/* roulang page: index */
:root {
            --color-primary: #2F6DB3;
            --color-primary-light: #EBF3FA;
            --color-primary-deep: #1F4E7A;
            --color-accent: #1FA37A;
            --color-cta: #E98120;
            --color-cta-hover: #c96e15;
            --color-bg: #F7F9FC;
            --color-card: #FFFFFF;
            --color-text: #1F2933;
            --color-text-secondary: #5B6770;
            --color-border: #E1E7EC;
            --color-footer-bg: #172636;
            --color-footer-text: #B8C2CC;
            --color-img-placeholder: #EEF2F7;
            --radius-card: 12px;
            --radius-btn: 8px;
            --radius-badge: 999px;
            --shadow-card: 0 2px 8px rgba(31, 42, 53, .06);
            --shadow-card-hover: 0 8px 24px rgba(47, 109, 179, .12);
            --shadow-nav: 0 2px 12px rgba(31, 42, 53, .08);
            --transition-base: all .25s ease;
            --font-family-base: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            --section-gap: 72px;
            --card-padding: 28px;
            --grid-gap: 24px;
        }

        * {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-family-base);
            font-size: 15px;
            line-height: 1.75;
            color: var(--color-text);
            background-color: var(--color-bg);
            margin: 0;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        a {
            text-decoration: none;
            color: var(--color-primary);
            transition: var(--transition-base);
        }
        a:hover {
            color: var(--color-primary-deep);
        }
        a:focus-visible {
            outline: 2px solid var(--color-cta);
            outline-offset: 2px;
            border-radius: 2px;
        }
        img {
            max-width: 100%;
            height: auto;
            object-fit: cover;
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }
        button:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--color-cta);
            outline-offset: 1px;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.35;
            font-weight: 700;
            color: var(--color-text);
            margin-top: 0;
        }
        h1 {
            font-size: clamp(32px, 5vw, 44px);
            font-weight: 800;
            letter-spacing: .01em;
        }
        h2 {
            font-size: clamp(26px, 3.5vw, 34px);
            font-weight: 700;
        }
        h3 {
            font-size: clamp(20px, 2.5vw, 26px);
            font-weight: 650;
        }
        h4 {
            font-size: 18px;
            font-weight: 600;
        }
        p {
            margin: 0 0 1rem;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        section {
            padding: var(--section-gap) 0;
        }
        section.section-alt {
            background-color: #FFFFFF;
        }
        section.section-tint {
            background-color: var(--color-primary-light);
        }

        .section-label {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--color-primary);
            background: var(--color-primary-light);
            padding: 6px 14px;
            border-radius: var(--radius-badge);
            margin-bottom: 12px;
            letter-spacing: .02em;
        }
        .section-title {
            margin-bottom: 12px;
        }
        .section-desc {
            font-size: 16px;
            color: var(--color-text-secondary);
            max-width: 720px;
            margin-bottom: 32px;
        }
        .section-desc.center {
            margin-left: auto;
            margin-right: auto;
            text-align: center;
        }

        /* ============ NAV ============ */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1030;
            background: linear-gradient(135deg, var(--color-primary-deep) 0%, var(--color-primary) 65%, #4A8AC9 100%);
            box-shadow: var(--shadow-nav);
        }
        .site-header .navbar {
            padding: 0;
        }
        .site-header .navbar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            color: #FFFFFF;
            font-weight: 700;
            font-size: 22px;
            letter-spacing: .02em;
            padding: 14px 0;
        }
        .site-header .navbar-brand:hover {
            color: #FFFFFF;
            opacity: .9;
        }
        .brand-icon {
            width: 36px;
            height: 36px;
            border-radius: 9px;
            background: rgba(255, 255, 255, .15);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: #fff;
            flex-shrink: 0;
        }
        .site-header .navbar-toggler {
            border: none;
            color: #fff;
            font-size: 24px;
            padding: 10px 0;
        }
        .site-header .navbar-toggler:focus {
            box-shadow: none;
            outline: 2px solid rgba(255, 255, 255, .5);
            outline-offset: 2px;
            border-radius: 6px;
        }
        .site-header .navbar-nav {
            gap: 4px;
        }
        .site-header .navbar-nav .nav-link {
            color: rgba(255, 255, 255, .85);
            font-size: 14px;
            font-weight: 500;
            padding: 18px 14px !important;
            border-radius: 6px;
            transition: var(--transition-base);
            letter-spacing: .01em;
            position: relative;
            white-space: nowrap;
        }
        .site-header .navbar-nav .nav-link:hover,
        .site-header .navbar-nav .nav-link.active {
            color: #FFFFFF;
            background: rgba(255, 255, 255, .12);
        }
        .site-header .navbar-nav .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 8px;
            left: 14px;
            right: 14px;
            height: 2px;
            background: #FFFFFF;
            border-radius: 2px;
        }
        .nav-cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--color-cta);
            color: #FFFFFF;
            font-size: 14px;
            font-weight: 600;
            padding: 10px 18px;
            border-radius: var(--radius-btn);
            border: none;
            transition: var(--transition-base);
            white-space: nowrap;
        }
        .nav-cta-btn:hover {
            background: var(--color-cta-hover);
            color: #FFFFFF;
        }
        @media (max-width: 991.98px) {
            .site-header .navbar-collapse {
                background: linear-gradient(135deg, var(--color-primary-deep), var(--color-primary));
                border-radius: 0 0 12px 12px;
                padding: 12px 16px 16px;
                margin-top: 4px;
            }
            .site-header .navbar-nav .nav-link {
                padding: 12px 14px !important;
                font-size: 15px;
            }
            .site-header .navbar-nav .nav-link.active::after {
                display: none;
            }
            .nav-cta-btn {
                margin-top: 8px;
                width: fit-content;
            }
        }

        /* ============ HERO ============ */
        .hero-section {
            background: linear-gradient(180deg, #F7FAFD 0%, var(--color-primary-light) 60%, var(--color-bg) 100%);
            padding: 64px 0 56px;
            position: relative;
            overflow: hidden;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            top: -120px;
            right: -120px;
            width: 360px;
            height: 360px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(47, 109, 179, .08) 0%, transparent 70%);
            pointer-events: none;
        }
        .hero-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
            position: relative;
            z-index: 1;
        }
        .hero-content .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: #FFFFFF;
            border: 1px solid var(--color-border);
            border-radius: var(--radius-badge);
            padding: 7px 16px;
            font-size: 13px;
            font-weight: 600;
            color: var(--color-primary);
            margin-bottom: 18px;
            box-shadow: var(--shadow-card);
        }
        .hero-content .hero-badge .dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--color-accent);
            display: inline-block;
            animation: pulse-dot 1.8s infinite;
        }
        @keyframes pulse-dot {
            0%,
            100% {
                opacity: 1;
                transform: scale(1);
            }
            50% {
                opacity: .5;
                transform: scale(1.4);
            }
        }
        .hero-content h1 {
            margin-bottom: 16px;
            font-size: clamp(30px, 4.5vw, 42px);
        }
        .hero-content .hero-desc {
            font-size: 16px;
            color: var(--color-text-secondary);
            max-width: 540px;
            margin-bottom: 24px;
            line-height: 1.8;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            align-items: center;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-weight: 600;
            font-size: 15px;
            padding: 12px 24px;
            border-radius: var(--radius-btn);
            border: none;
            transition: var(--transition-base);
            cursor: pointer;
            text-align: center;
            justify-content: center;
        }
        .btn-primary {
            background: var(--color-cta);
            color: #FFFFFF;
        }
        .btn-primary:hover {
            background: var(--color-cta-hover);
            color: #FFFFFF;
            transform: translateY(-1px);
            box-shadow: 0 6px 18px rgba(233, 129, 32, .28);
        }
        .btn-outline {
            background: transparent;
            color: var(--color-primary);
            border: 1.5px solid var(--color-primary);
        }
        .btn-outline:hover {
            background: var(--color-primary-light);
            color: var(--color-primary-deep);
            border-color: var(--color-primary-deep);
        }
        .btn-sm {
            padding: 8px 16px;
            font-size: 13px;
            border-radius: 6px;
        }
        .hero-stats {
            display: flex;
            gap: 32px;
            margin-top: 28px;
            flex-wrap: wrap;
        }
        .hero-stat {
            display: flex;
            flex-direction: column;
        }
        .hero-stat .num {
            font-size: 28px;
            font-weight: 800;
            color: var(--color-primary-deep);
            line-height: 1.2;
        }
        .hero-stat .label {
            font-size: 13px;
            color: var(--color-text-secondary);
        }
        .hero-visual {
            background: #FFFFFF;
            border-radius: 16px;
            box-shadow: 0 12px 36px rgba(47, 109, 179, .14);
            overflow: hidden;
            border: 1px solid var(--color-border);
        }
        .hero-visual .visual-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 16px 20px;
            background: #FAFCFE;
            border-bottom: 1px solid var(--color-border);
            font-size: 14px;
            font-weight: 600;
            color: var(--color-primary-deep);
        }
        .hero-visual .visual-header .badge-live {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            font-size: 12px;
            background: rgba(31, 163, 122, .12);
            color: var(--color-accent);
            padding: 4px 10px;
            border-radius: var(--radius-badge);
        }
        .match-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 20px;
            border-bottom: 1px solid #F0F4F8;
            gap: 12px;
            flex-wrap: wrap;
        }
        .match-row:last-child {
            border-bottom: none;
        }
        .match-info {
            display: flex;
            align-items: center;
            gap: 12px;
            flex: 1;
            min-width: 200px;
        }
        .match-info .time {
            font-size: 13px;
            font-weight: 600;
            color: var(--color-primary);
            background: var(--color-primary-light);
            padding: 4px 10px;
            border-radius: 6px;
            white-space: nowrap;
        }
        .match-info .teams {
            font-size: 14px;
            font-weight: 600;
        }
        .match-tag {
            font-size: 12px;
            background: #F5F7FA;
            color: var(--color-text-secondary);
            padding: 4px 10px;
            border-radius: var(--radius-badge);
            white-space: nowrap;
        }
        .visual-footer {
            padding: 14px 20px;
            background: #FAFCFE;
            border-top: 1px solid var(--color-border);
            text-align: center;
            font-size: 13px;
            color: var(--color-text-secondary);
        }

        /* ============ BRAND INTRO SECTION ============ */
        .brand-intro-section {
            background: #FFFFFF;
            padding: 56px 0;
            border-bottom: 1px solid var(--color-border);
        }
        .brand-intro-card {
            background: #FFFFFF;
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 36px 40px;
            max-width: 880px;
            margin: 0 auto;
            border: 1px solid var(--color-border);
            text-align: center;
        }
        .brand-intro-card .brand-mark {
            width: 56px;
            height: 56px;
            border-radius: 14px;
            background: linear-gradient(135deg, var(--color-primary), var(--color-primary-deep));
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 26px;
            margin: 0 auto 16px;
            font-weight: 700;
        }
        .brand-intro-card p {
            font-size: 15.5px;
            color: var(--color-text-secondary);
            line-height: 1.8;
            margin-bottom: 0;
            text-align: left;
        }

        /* ============ CARDS ============ */
        .custom-card {
            background: var(--color-card);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--color-border);
            padding: var(--card-padding);
            transition: var(--transition-base);
            height: 100%;
            position: relative;
            overflow: hidden;
        }
        .custom-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
            border-color: rgba(47, 109, 179, .25);
        }
        .custom-card .card-icon {
            width: 48px;
            height: 48px;
            border-radius: 10px;
            background: var(--color-primary-light);
            color: var(--color-primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            margin-bottom: 16px;
            flex-shrink: 0;
        }
        .custom-card .card-icon.accent {
            background: rgba(31, 163, 122, .1);
            color: var(--color-accent);
        }
        .custom-card h3 {
            font-size: 19px;
            margin-bottom: 8px;
        }
        .custom-card p {
            font-size: 14px;
            color: var(--color-text-secondary);
            margin-bottom: 0;
            line-height: 1.7;
        }
        .custom-card .card-link {
            font-size: 13px;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            margin-top: 12px;
        }

        /* ============ SCENE CARDS ============ */
        .scene-card {
            background: #FFFFFF;
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--color-border);
            transition: var(--transition-base);
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .scene-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
            border-color: rgba(47, 109, 179, .25);
        }
        .scene-card .scene-img {
            aspect-ratio: 16/9;
            background: var(--color-img-placeholder);
            overflow: hidden;
            position: relative;
        }
        .scene-card .scene-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            display: block;
        }
        .scene-card .scene-body {
            padding: 20px 22px 22px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .scene-card .scene-tag {
            display: inline-block;
            font-size: 12px;
            background: var(--color-primary-light);
            color: var(--color-primary);
            padding: 4px 10px;
            border-radius: var(--radius-badge);
            margin-bottom: 10px;
            font-weight: 600;
        }
        .scene-card h4 {
            font-size: 17px;
            margin-bottom: 8px;
        }
        .scene-card p {
            font-size: 13.5px;
            color: var(--color-text-secondary);
            margin-bottom: 0;
            line-height: 1.7;
            flex: 1;
        }

        /* ============ CASE CARDS ============ */
        .case-card {
            background: #FFFFFF;
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--color-border);
            padding: 24px;
            transition: var(--transition-base);
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .case-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
            border-color: rgba(47, 109, 179, .25);
        }
        .case-card .case-meta {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
            margin-bottom: 12px;
        }
        .case-card .case-meta span {
            font-size: 12px;
            background: #F5F7FA;
            color: var(--color-text-secondary);
            padding: 4px 10px;
            border-radius: var(--radius-badge);
            font-weight: 500;
        }
        .case-card h4 {
            font-size: 17px;
            margin-bottom: 10px;
        }
        .case-card .case-desc {
            font-size: 13.5px;
            color: var(--color-text-secondary);
            line-height: 1.7;
            margin-bottom: 14px;
            flex: 1;
        }
        .case-card .case-stats {
            display: flex;
            gap: 24px;
            border-top: 1px solid #F0F4F8;
            padding-top: 14px;
        }
        .case-card .case-stats .stat-item .num {
            font-size: 20px;
            font-weight: 800;
            color: var(--color-primary-deep);
            line-height: 1.2;
        }
        .case-card .case-stats .stat-item .label {
            font-size: 12px;
            color: var(--color-text-secondary);
        }

        /* ============ PRICING ============ */
        .pricing-card {
            background: #FFFFFF;
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--color-border);
            padding: 28px 24px;
            transition: var(--transition-base);
            height: 100%;
            display: flex;
            flex-direction: column;
            position: relative;
        }
        .pricing-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }
        .pricing-card.featured {
            border: 2px solid var(--color-cta);
            box-shadow: 0 8px 28px rgba(233, 129, 32, .14);
        }
        .pricing-card .featured-badge {
            position: absolute;
            top: -12px;
            left: 50%;
            transform: translateX(-50%);
            background: var(--color-cta);
            color: #fff;
            font-size: 12px;
            font-weight: 700;
            padding: 5px 16px;
            border-radius: var(--radius-badge);
            white-space: nowrap;
        }
        .pricing-card .plan-name {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .pricing-card .plan-price {
            font-size: 36px;
            font-weight: 800;
            color: var(--color-primary-deep);
            margin-bottom: 4px;
        }
        .pricing-card .plan-price .unit {
            font-size: 15px;
            font-weight: 500;
            color: var(--color-text-secondary);
        }
        .pricing-card .plan-desc {
            font-size: 13px;
            color: var(--color-text-secondary);
            margin-bottom: 16px;
        }
        .pricing-card ul {
            list-style: none;
            padding: 0;
            margin: 0 0 20px;
            flex: 1;
        }
        .pricing-card ul li {
            font-size: 14px;
            color: var(--color-text);
            padding: 7px 0;
            border-bottom: 1px solid #F0F4F8;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .pricing-card ul li::before {
            content: '\f00c';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            color: var(--color-accent);
            font-size: 13px;
        }
        .pricing-card .btn {
            width: 100%;
            justify-content: center;
        }

        /* ============ REVIEWS ============ */
        .review-card {
            background: #FFFFFF;
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--color-border);
            padding: 20px 22px;
            transition: var(--transition-base);
            height: 100%;
        }
        .review-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
            border-color: rgba(47, 109, 179, .25);
        }
        .review-card .review-head {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 10px;
        }
        .review-card .review-avatar {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--color-primary-light);
            color: var(--color-primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            font-weight: 700;
            flex-shrink: 0;
        }
        .review-card .review-name {
            font-size: 14px;
            font-weight: 600;
        }
        .review-card .review-time {
            font-size: 12px;
            color: var(--color-text-secondary);
        }
        .review-card .review-text {
            font-size: 13.5px;
            color: var(--color-text-secondary);
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* ============ WORD OF MOUTH ============ */
        .wom-section {
            background: #FFFFFF;
        }
        .wom-data-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .wom-data-item {
            text-align: center;
            padding: 28px 16px;
            background: #FFFFFF;
            border-radius: var(--radius-card);
            border: 1px solid var(--color-border);
            transition: var(--transition-base);
        }
        .wom-data-item:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }
        .wom-data-item .wom-num {
            font-size: 36px;
            font-weight: 800;
            color: var(--color-primary);
            line-height: 1.2;
            margin-bottom: 4px;
        }
        .wom-data-item .wom-label {
            font-size: 13px;
            color: var(--color-text-secondary);
        }
        .wom-keywords {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            justify-content: center;
            margin-top: 24px;
        }
        .wom-keywords .kw-tag {
            background: var(--color-primary-light);
            color: var(--color-primary-deep);
            font-size: 13px;
            padding: 6px 14px;
            border-radius: var(--radius-badge);
            font-weight: 500;
        }

        /* ============ NEWS ============ */
        .news-item {
            background: #FFFFFF;
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--color-border);
            padding: 18px 22px;
            display: flex;
            gap: 16px;
            align-items: flex-start;
            transition: var(--transition-base);
            margin-bottom: 14px;
        }
        .news-item:hover {
            box-shadow: var(--shadow-card-hover);
            border-color: rgba(47, 109, 179, .25);
        }
        .news-item .news-date {
            font-size: 12px;
            font-weight: 600;
            color: var(--color-text-secondary);
            background: #F5F7FA;
            padding: 4px 10px;
            border-radius: 6px;
            white-space: nowrap;
            flex-shrink: 0;
            margin-top: 2px;
        }
        .news-item .news-content {
            flex: 1;
        }
        .news-item .news-title {
            font-size: 15px;
            font-weight: 600;
            color: var(--color-text);
            margin-bottom: 4px;
        }
        .news-item .news-summary {
            font-size: 13.5px;
            color: var(--color-text-secondary);
            line-height: 1.7;
            margin-bottom: 8px;
        }
        .news-item .news-link {
            font-size: 13px;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }

        /* ============ CTA SECTION ============ */
        .cta-section {
            background: linear-gradient(135deg, #F7FAFD 0%, var(--color-primary-light) 100%);
            padding: 64px 0;
        }
        .cta-panel {
            background: #FFFFFF;
            border-radius: 16px;
            box-shadow: 0 12px 36px rgba(47, 109, 179, .12);
            padding: 48px 40px;
            text-align: center;
            max-width: 780px;
            margin: 0 auto;
            border: 1px solid var(--color-border);
        }
        .cta-panel h2 {
            margin-bottom: 12px;
        }
        .cta-panel p {
            font-size: 15px;
            color: var(--color-text-secondary);
            margin-bottom: 24px;
        }
        .cta-panel .btn {
            padding: 14px 32px;
            font-size: 16px;
        }

        /* ============ FOOTER ============ */
        .site-footer {
            background: var(--color-footer-bg);
            color: var(--color-footer-text);
            padding: 48px 0 32px;
            font-size: 14px;
        }
        .site-footer .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            color: #FFFFFF;
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 12px;
        }
        .site-footer .footer-brand .brand-icon {
            background: rgba(255, 255, 255, .15);
            color: #fff;
        }
        .site-footer .footer-desc {
            font-size: 13px;
            color: var(--color-footer-text);
            line-height: 1.7;
            max-width: 320px;
            margin-bottom: 20px;
        }
        .site-footer .footer-title {
            font-size: 15px;
            font-weight: 600;
            color: #FFFFFF;
            margin-bottom: 14px;
        }
        .site-footer .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .site-footer .footer-links li {
            margin-bottom: 8px;
        }
        .site-footer .footer-links a {
            color: var(--color-footer-text);
            font-size: 13.5px;
            transition: var(--transition-base);
        }
        .site-footer .footer-links a:hover {
            color: #FFFFFF;
        }
        .site-footer .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .08);
            margin-top: 32px;
            padding-top: 20px;
            text-align: center;
            font-size: 13px;
            color: rgba(184, 194, 204, .8);
        }
        .site-footer .footer-bottom a {
            color: var(--color-footer-text);
            transition: var(--transition-base);
        }
        .site-footer .footer-bottom a:hover {
            color: #FFFFFF;
        }
        .site-footer .footer-bottom .separator {
            margin: 0 8px;
            opacity: .5;
        }

        /* ============ RESPONSIVE ============ */
        @media (max-width: 1024px) {
            :root {
                --section-gap: 56px;
            }
            .hero-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .hero-content .hero-desc {
                max-width: 100%;
            }
            .wom-data-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            :root {
                --section-gap: 44px;
                --card-padding: 20px;
                --grid-gap: 16px;
            }
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .hero-section {
                padding: 40px 0 36px;
            }
            .hero-content h1 {
                font-size: 28px;
            }
            .hero-stats {
                gap: 20px;
            }
            .hero-stat .num {
                font-size: 22px;
            }
            .brand-intro-card {
                padding: 24px 20px;
            }
            .news-item {
                flex-direction: column;
                gap: 8px;
                padding: 16px 18px;
            }
            .cta-panel {
                padding: 32px 20px;
            }
            .site-footer .footer-title {
                margin-top: 20px;
            }
        }

        @media (max-width: 520px) {
            :root {
                --section-gap: 36px;
                --card-padding: 16px;
            }
            .hero-content h1 {
                font-size: 24px;
            }
            .hero-content .hero-desc {
                font-size: 15px;
            }
            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .btn {
                width: 100%;
                justify-content: center;
            }
            .wom-data-grid {
                grid-template-columns: 1fr;
                gap: 12px;
            }
            .match-row {
                flex-direction: column;
                align-items: flex-start;
            }
            .match-info {
                min-width: auto;
            }
            .section-desc {
                font-size: 15px;
            }
            .review-card {
                padding: 16px 18px;
            }
            .case-card {
                padding: 18px;
            }
            .pricing-card {
                padding: 22px 18px;
            }
        }

        .img-cover {
            width: 100%;
            height: 100%;
            object-fit: cover;
            display: block;
        }
        .img-ratio-16-9 {
            aspect-ratio: 16/9;
            background: var(--color-img-placeholder);
            border-radius: var(--radius-card);
            overflow: hidden;
        }
        .img-ratio-4-3 {
            aspect-ratio: 4/3;
            background: var(--color-img-placeholder);
            border-radius: var(--radius-card);
            overflow: hidden;
        }

/* roulang page: category1 */
:root {
            --color-primary: #2F6DB3;
            --color-primary-light: #EBF3FA;
            --color-primary-deep: #1F4E7A;
            --color-accent: #1FA37A;
            --color-cta: #E98120;
            --color-cta-hover: #c96e15;
            --color-bg: #F7F9FC;
            --color-card: #FFFFFF;
            --color-text: #1F2933;
            --color-text-secondary: #5B6770;
            --color-border: #E1E7EC;
            --color-footer-bg: #172636;
            --color-footer-text: #B8C2CC;
            --color-img-placeholder: #EEF2F7;
            --radius-card: 12px;
            --radius-btn: 8px;
            --radius-badge: 999px;
            --shadow-card: 0 2px 8px rgba(31, 42, 53, .06);
            --shadow-card-hover: 0 8px 24px rgba(47, 109, 179, .12);
            --shadow-nav: 0 2px 12px rgba(31, 42, 53, .08);
            --transition-base: all .25s ease;
            --font-family-base: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            --section-gap: 72px;
            --card-padding: 28px;
            --grid-gap: 24px;
        }

        * {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-family-base);
            font-size: 15px;
            line-height: 1.75;
            color: var(--color-text);
            background-color: var(--color-bg);
            margin: 0;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        a {
            text-decoration: none;
            color: var(--color-primary);
            transition: var(--transition-base);
        }

        a:hover {
            color: var(--color-primary-deep);
        }

        a:focus-visible {
            outline: 2px solid var(--color-cta);
            outline-offset: 2px;
            border-radius: 2px;
        }

        img {
            max-width: 100%;
            height: auto;
            object-fit: cover;
        }

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }

        button:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--color-cta);
            outline-offset: 1px;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        section {
            padding: var(--section-gap) 0;
        }

        section.section-alt {
            background-color: #FFFFFF;
        }

        section.section-tint {
            background-color: var(--color-primary-light);
        }

        .section-label {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--color-primary);
            background: var(--color-primary-light);
            padding: 6px 14px;
            border-radius: var(--radius-badge);
            margin-bottom: 12px;
            letter-spacing: .02em;
        }

        .section-title {
            margin-bottom: 12px;
            font-size: 30px;
            font-weight: 700;
            line-height: 1.35;
            color: var(--color-text);
        }

        .section-desc {
            font-size: 16px;
            color: var(--color-text-secondary);
            max-width: 720px;
            margin-bottom: 32px;
        }

        .section-desc.center {
            margin-left: auto;
            margin-right: auto;
            text-align: center;
        }

        /* ============ NAV ============ */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1030;
            background: linear-gradient(135deg, var(--color-primary-deep) 0%, var(--color-primary) 65%, #4A8AC9 100%);
            box-shadow: var(--shadow-nav);
        }

        .site-header .navbar {
            padding: 0;
        }

        .site-header .navbar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            color: #FFFFFF;
            font-weight: 700;
            font-size: 22px;
            letter-spacing: .02em;
            padding: 14px 0;
        }

        .site-header .navbar-brand:hover {
            color: #FFFFFF;
            opacity: .9;
        }

        .brand-icon {
            width: 36px;
            height: 36px;
            border-radius: 9px;
            background: rgba(255, 255, 255, .15);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: #fff;
            flex-shrink: 0;
        }

        .site-header .navbar-toggler {
            border: none;
            color: #fff;
            font-size: 24px;
            padding: 10px 0;
        }

        .site-header .navbar-toggler:focus {
            box-shadow: none;
            outline: 2px solid rgba(255, 255, 255, .5);
            outline-offset: 2px;
            border-radius: 6px;
        }

        .site-header .navbar-nav {
            gap: 4px;
        }

        .site-header .navbar-nav .nav-link {
            color: rgba(255, 255, 255, .85);
            font-size: 14px;
            font-weight: 500;
            padding: 18px 14px !important;
            border-radius: 6px;
            transition: var(--transition-base);
            letter-spacing: .01em;
            position: relative;
            white-space: nowrap;
        }

        .site-header .navbar-nav .nav-link:hover,
        .site-header .navbar-nav .nav-link.active {
            color: #FFFFFF;
            background: rgba(255, 255, 255, .12);
        }

        .nav-cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--color-cta);
            color: #fff;
            font-weight: 600;
            font-size: 14px;
            padding: 10px 20px;
            border-radius: var(--radius-btn);
            border: none;
            transition: var(--transition-base);
            white-space: nowrap;
        }

        .nav-cta-btn:hover {
            background: var(--color-cta-hover);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 4px 12px rgba(233, 129, 32, .3);
        }

        /* ============ PAGE HEADER ============ */
        .page-header {
            background: linear-gradient(135deg, var(--color-primary-light) 0%, #FFFFFF 55%, #FFFFFF 100%);
            padding: 52px 0 44px;
            border-bottom: 1px solid var(--color-border);
        }

        .breadcrumb-custom {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--color-text-secondary);
            margin-bottom: 18px;
            flex-wrap: wrap;
        }

        .breadcrumb-custom a {
            color: var(--color-primary);
            font-weight: 500;
        }

        .breadcrumb-custom a:hover {
            color: var(--color-primary-deep);
        }

        .breadcrumb-custom .separator {
            color: var(--color-border);
            font-size: 12px;
        }

        .breadcrumb-custom .current {
            color: var(--color-text-secondary);
            font-weight: 500;
        }

        .page-header-content {
            display: grid;
            grid-template-columns: 1fr 380px;
            gap: 40px;
            align-items: center;
        }

        .page-header-title {
            font-size: 36px;
            font-weight: 700;
            line-height: 1.3;
            color: var(--color-text);
            margin-bottom: 14px;
        }

        .page-header-desc {
            font-size: 16px;
            color: var(--color-text-secondary);
            max-width: 560px;
            margin-bottom: 0;
        }

        .page-header-image {
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card-hover);
            aspect-ratio: 16/10;
            background: var(--color-img-placeholder);
        }

        .page-header-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            display: block;
        }

        /* ============ FILTER + CARDS ============ */
        .filter-sidebar {
            position: sticky;
            top: 100px;
        }

        .filter-card {
            background: var(--color-card);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 24px;
            border: 1px solid var(--color-border);
        }

        .filter-card-title {
            font-size: 15px;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .filter-list {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .filter-list li button {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            background: transparent;
            border: 1px solid var(--color-border);
            border-radius: var(--radius-btn);
            padding: 10px 16px;
            font-size: 14px;
            color: var(--color-text-secondary);
            cursor: pointer;
            transition: var(--transition-base);
            font-weight: 500;
            text-align: left;
        }

        .filter-list li button:hover {
            border-color: var(--color-primary);
            color: var(--color-primary);
            background: var(--color-primary-light);
        }

        .filter-list li button.active {
            border-color: var(--color-primary);
            color: #fff;
            background: var(--color-primary);
            font-weight: 600;
        }

        .filter-list li button .count {
            font-size: 12px;
            background: var(--color-primary-light);
            color: var(--color-primary);
            padding: 2px 10px;
            border-radius: var(--radius-badge);
            font-weight: 600;
        }

        .filter-list li button.active .count {
            background: rgba(255, 255, 255, .25);
            color: #fff;
        }

        .product-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: var(--grid-gap);
        }

        .product-card {
            background: var(--color-card);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            border: 1px solid var(--color-border);
            transition: var(--transition-base);
            display: flex;
            flex-direction: column;
        }

        .product-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
            border-color: var(--color-primary);
        }

        .product-card-image {
            aspect-ratio: 16/9;
            background: var(--color-img-placeholder);
            overflow: hidden;
            position: relative;
        }

        .product-card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .5s ease;
        }

        .product-card:hover .product-card-image img {
            transform: scale(1.04);
        }

        .product-card-badge {
            position: absolute;
            top: 14px;
            left: 14px;
            background: rgba(31, 42, 53, .75);
            color: #fff;
            font-size: 12px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: var(--radius-badge);
            backdrop-filter: blur(4px);
        }

        .product-card-body {
            padding: 22px 24px 26px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .product-card-title {
            font-size: 18px;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 10px;
            line-height: 1.4;
        }

        .product-card-text {
            font-size: 14px;
            color: var(--color-text-secondary);
            margin-bottom: 16px;
            flex: 1;
            line-height: 1.7;
        }

        .product-card-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .product-card-tags .tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 500;
            color: var(--color-primary);
            background: var(--color-primary-light);
            padding: 4px 12px;
            border-radius: var(--radius-badge);
        }

        /* ============ ADVANTAGE ============ */
        .advantage-panel {
            background: var(--color-card);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--color-border);
            padding: 36px 40px;
        }

        .advantage-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
        }

        .advantage-item {
            text-align: center;
        }

        .advantage-icon {
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: var(--color-primary-light);
            color: var(--color-primary);
            font-size: 22px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 14px;
        }

        .advantage-number {
            font-size: 32px;
            font-weight: 700;
            color: var(--color-text);
            line-height: 1.2;
            margin-bottom: 6px;
        }

        .advantage-label {
            font-size: 13px;
            color: var(--color-text-secondary);
            font-weight: 500;
        }

        /* ============ SPECS ============ */
        .specs-wrapper {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--grid-gap);
        }

        .spec-card {
            background: var(--color-card);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--color-border);
            padding: 26px 28px;
        }

        .spec-card-title {
            font-size: 15px;
            font-weight: 700;
            color: var(--color-primary-deep);
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .spec-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .spec-list li {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 10px 0;
            border-bottom: 1px dashed var(--color-border);
            font-size: 14px;
        }

        .spec-list li:last-child {
            border-bottom: none;
        }

        .spec-list .spec-name {
            color: var(--color-text-secondary);
            font-weight: 500;
        }

        .spec-list .spec-value {
            color: var(--color-text);
            font-weight: 600;
            text-align: right;
        }

        /* ============ PROCESS ============ */
        .process-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--grid-gap);
            counter-reset: step;
        }

        .process-step {
            background: var(--color-card);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 28px 24px;
            position: relative;
            border: 1px solid var(--color-border);
            transition: var(--transition-base);
        }

        .process-step:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
            border-color: var(--color-primary);
        }

        .process-step-number {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--color-primary);
            color: #fff;
            font-size: 16px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 14px;
        }

        .process-step-title {
            font-size: 16px;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 8px;
        }

        .process-step-desc {
            font-size: 14px;
            color: var(--color-text-secondary);
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* ============ ENVIRONMENT ============ */
        .env-grid {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 18px;
        }

        .env-item {
            background: var(--color-card);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--color-border);
            padding: 24px 18px;
            text-align: center;
            transition: var(--transition-base);
        }

        .env-item:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
            border-color: var(--color-primary);
        }

        .env-item-icon {
            font-size: 32px;
            color: var(--color-primary);
            margin-bottom: 12px;
        }

        .env-item-name {
            font-size: 14px;
            font-weight: 600;
            color: var(--color-text);
            margin-bottom: 4px;
        }

        .env-item-note {
            font-size: 12px;
            color: var(--color-text-secondary);
        }

        /* ============ FAQ ============ */
        .accordion-custom .accordion-item {
            border: 1px solid var(--color-border);
            border-radius: var(--radius-btn) !important;
            margin-bottom: 12px;
            overflow: hidden;
            background: var(--color-card);
            box-shadow: var(--shadow-card);
        }

        .accordion-custom .accordion-button {
            background: var(--color-card);
            color: var(--color-text);
            font-weight: 600;
            font-size: 15px;
            padding: 18px 22px;
            border: none;
            box-shadow: none;
            transition: var(--transition-base);
            border-radius: var(--radius-btn) !important;
        }

        .accordion-custom .accordion-button:not(.collapsed) {
            background: var(--color-primary-light);
            color: var(--color-primary-deep);
            box-shadow: none;
        }

        .accordion-custom .accordion-button:focus {
            box-shadow: none;
            outline: 2px solid var(--color-cta);
            outline-offset: -2px;
        }

        .accordion-custom .accordion-button::after {
            background-size: 16px;
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 448 512'%3E%3Cpath fill='%232F6DB3' d='M201.4 374.6c12.5 12.5 32.8 12.5 45.3 0l160-160c12.5-12.5 12.5-32.8 0-45.3s-32.8-12.5-45.3 0L224 306.7 86.6 169.4c-12.5-12.5-32.8-12.5-45.3 0s-12.5 32.8 0 45.3l160 160z'/%3E%3C/svg%3E");
        }

        .accordion-custom .accordion-body {
            padding: 16px 22px 20px;
            font-size: 14px;
            color: var(--color-text-secondary);
            line-height: 1.75;
            background: var(--color-card);
        }

        /* ============ CTA ============ */
        .cta-card {
            background: linear-gradient(135deg, var(--color-primary-deep) 0%, var(--color-primary) 70%, #4A8AC9 100%);
            border-radius: var(--radius-card);
            padding: 52px 48px;
            text-align: center;
            color: #fff;
            box-shadow: var(--shadow-card-hover);
        }

        .cta-card-title {
            font-size: 30px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
            line-height: 1.35;
        }

        .cta-card-desc {
            font-size: 16px;
            color: rgba(255, 255, 255, .82);
            max-width: 540px;
            margin: 0 auto 28px;
            line-height: 1.7;
        }

        .btn-cta-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--color-cta);
            color: #fff;
            font-weight: 700;
            font-size: 16px;
            padding: 13px 30px;
            border-radius: var(--radius-btn);
            border: none;
            transition: var(--transition-base);
            cursor: pointer;
        }

        .btn-cta-primary:hover {
            background: var(--color-cta-hover);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 6px 18px rgba(233, 129, 32, .35);
        }

        /* ============ FOOTER ============ */
        .site-footer {
            background: var(--color-footer-bg);
            color: var(--color-footer-text);
            padding: 56px 0 28px;
            margin-top: 0;
        }

        .site-footer .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            color: #fff;
            font-weight: 700;
            font-size: 20px;
            margin-bottom: 14px;
        }

        .site-footer .footer-brand .brand-icon {
            background: rgba(255, 255, 255, .1);
        }

        .footer-desc {
            font-size: 14px;
            line-height: 1.75;
            color: var(--color-footer-text);
            max-width: 320px;
        }

        .footer-title {
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }

        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-links a {
            color: var(--color-footer-text);
            font-size: 14px;
            transition: var(--transition-base);
        }

        .footer-links a:hover {
            color: #fff;
            padding-left: 4px;
        }

        .footer-bottom {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-wrap: wrap;
            margin-top: 40px;
            padding-top: 22px;
            border-top: 1px solid rgba(255, 255, 255, .08);
            font-size: 13px;
            color: var(--color-footer-text);
        }

        .footer-bottom a {
            color: var(--color-footer-text);
        }

        .footer-bottom a:hover {
            color: #fff;
        }

        .footer-bottom .separator {
            opacity: .5;
        }

        /* ============ RESPONSIVE ============ */
        @media (max-width: 991px) {
            .site-header .navbar-nav {
                padding: 12px 0;
            }
            .site-header .navbar-nav .nav-link {
                padding: 12px 16px !important;
                color: #fff;
            }
            .nav-cta-btn {
                margin: 8px 0 14px;
                width: 100%;
                justify-content: center;
            }
            .site-header .navbar-collapse {
                background: rgba(31, 78, 122, .95);
                border-radius: 8px;
                padding: 10px 16px;
                margin-top: 8px;
            }
            .page-header-content {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .page-header-image {
                max-width: 480px;
            }
            .filter-sidebar {
                position: static;
                margin-bottom: 24px;
            }
            .filter-list {
                flex-direction: row;
                flex-wrap: wrap;
            }
            .filter-list li {
                flex: 1 1 auto;
                min-width: 140px;
            }
            .advantage-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .specs-wrapper {
                grid-template-columns: 1fr;
            }
            .process-steps {
                grid-template-columns: repeat(2, 1fr);
            }
            .env-grid {
                grid-template-columns: repeat(3, 1fr);
            }
        }

        @media (max-width: 767px) {
            :root {
                --section-gap: 48px;
                --card-padding: 22px;
                --grid-gap: 16px;
            }
            .page-header {
                padding: 36px 0 30px;
            }
            .page-header-title {
                font-size: 28px;
            }
            .product-grid {
                grid-template-columns: 1fr;
            }
            .advantage-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .process-steps {
                grid-template-columns: 1fr;
            }
            .env-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .cta-card {
                padding: 36px 22px;
            }
            .cta-card-title {
                font-size: 24px;
            }
            .section-title {
                font-size: 24px;
            }
        }

        @media (max-width: 520px) {
            :root {
                --section-gap: 36px;
                --card-padding: 18px;
                --grid-gap: 12px;
            }
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .page-header-title {
                font-size: 24px;
            }
            .page-header-desc {
                font-size: 14px;
            }
            .product-card-body {
                padding: 16px 18px 20px;
            }
            .product-card-title {
                font-size: 16px;
            }
            .advantage-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .advantage-number {
                font-size: 24px;
            }
            .advantage-icon {
                width: 42px;
                height: 42px;
                font-size: 18px;
            }
            .env-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .env-item {
                padding: 16px 10px;
            }
            .env-item-icon {
                font-size: 24px;
            }
            .filter-list li {
                min-width: 100%;
            }
            .footer-bottom {
                font-size: 12px;
                gap: 6px;
            }
            .cta-card {
                padding: 28px 16px;
            }
            .cta-card-title {
                font-size: 20px;
            }
            .btn-cta-primary {
                font-size: 14px;
                padding: 11px 22px;
            }
            .section-desc {
                font-size: 14px;
            }
        }

/* roulang page: category3 */
:root {
            --color-primary: #2F6DB3;
            --color-primary-light: #EBF3FA;
            --color-primary-deep: #1F4E7A;
            --color-accent: #1FA37A;
            --color-cta: #E98120;
            --color-cta-hover: #c96e15;
            --color-bg: #F7F9FC;
            --color-card: #FFFFFF;
            --color-text: #1F2933;
            --color-text-secondary: #5B6770;
            --color-border: #E1E7EC;
            --color-footer-bg: #172636;
            --color-footer-text: #B8C2CC;
            --color-img-placeholder: #EEF2F7;
            --radius-card: 12px;
            --radius-btn: 8px;
            --radius-badge: 999px;
            --shadow-card: 0 2px 8px rgba(31, 42, 53, .06);
            --shadow-card-hover: 0 8px 24px rgba(47, 109, 179, .12);
            --shadow-nav: 0 2px 12px rgba(31, 42, 53, .08);
            --transition-base: all .25s ease;
            --font-family-base: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            --section-gap: 72px;
            --card-padding: 28px;
            --grid-gap: 24px;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-family-base);
            font-size: 15px;
            line-height: 1.75;
            color: var(--color-text);
            background-color: var(--color-bg);
            margin: 0;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            text-decoration: none;
            color: var(--color-primary);
            transition: var(--transition-base);
        }
        a:hover {
            color: var(--color-primary-deep);
        }
        a:focus-visible {
            outline: 2px solid var(--color-cta);
            outline-offset: 2px;
            border-radius: 2px;
        }
        img {
            max-width: 100%;
            height: auto;
            object-fit: cover;
        }
        button, input, select, textarea {
            font-family: inherit;
            font-size: inherit;
        }
        button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible {
            outline: 2px solid var(--color-cta);
            outline-offset: 1px;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }
        section {
            padding: var(--section-gap) 0;
            position: relative;
        }
        section.section-alt {
            background-color: #FFFFFF;
        }
        section.section-tint {
            background-color: var(--color-primary-light);
        }
        .section-label {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--color-primary);
            background: var(--color-primary-light);
            padding: 6px 14px;
            border-radius: var(--radius-badge);
            margin-bottom: 12px;
            letter-spacing: .02em;
        }
        .section-title {
            margin-bottom: 12px;
            font-weight: 700;
            color: var(--color-text);
            line-height: 1.35;
        }
        .section-head {
            margin-bottom: 32px;
        }
        .section-desc {
            font-size: 16px;
            color: var(--color-text-secondary);
            max-width: 720px;
            margin-bottom: 0;
        }
        .section-desc.center {
            margin-left: auto;
            margin-right: auto;
            text-align: center;
        }

        /* ============ NAV ============ */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1030;
            background: linear-gradient(135deg, var(--color-primary-deep) 0%, var(--color-primary) 65%, #4A8AC9 100%);
            box-shadow: var(--shadow-nav);
        }
        .site-header .navbar {
            padding: 0;
        }
        .site-header .navbar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            color: #FFFFFF;
            font-weight: 700;
            font-size: 22px;
            letter-spacing: .02em;
            padding: 14px 0;
        }
        .site-header .navbar-brand:hover {
            color: #FFFFFF;
            opacity: .9;
        }
        .brand-icon {
            width: 36px;
            height: 36px;
            border-radius: 9px;
            background: rgba(255, 255, 255, .15);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: #fff;
            flex-shrink: 0;
        }
        .site-header .navbar-toggler {
            border: none;
            color: #fff;
            font-size: 24px;
            padding: 10px 0;
        }
        .site-header .navbar-toggler:focus {
            box-shadow: none;
            outline: 2px solid rgba(255, 255, 255, .5);
            outline-offset: 2px;
            border-radius: 6px;
        }
        .site-header .navbar-nav {
            gap: 4px;
        }
        .site-header .navbar-nav .nav-link {
            color: rgba(255, 255, 255, .85);
            font-size: 14px;
            font-weight: 500;
            padding: 18px 14px !important;
            border-radius: 6px;
            transition: var(--transition-base);
            letter-spacing: .01em;
            position: relative;
            white-space: nowrap;
        }
        .site-header .navbar-nav .nav-link:hover,
        .site-header .navbar-nav .nav-link.active {
            color: #FFFFFF;
            background: rgba(255, 255, 255, .12);
        }
        .nav-cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--color-cta);
            color: #fff;
            font-weight: 600;
            font-size: 14px;
            padding: 10px 18px;
            border-radius: var(--radius-btn);
            transition: var(--transition-base);
            white-space: nowrap;
        }
        .nav-cta-btn:hover {
            background: var(--color-cta-hover);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 4px 12px rgba(233, 129, 32, .25);
        }

        /* ============ CATEGORY HERO ============ */
        .category-hero {
            background: linear-gradient(180deg, #F7F9FC 0%, #FFFFFF 100%);
            padding: 48px 0;
            border-bottom: 1px solid var(--color-border);
        }
        .category-hero h1 {
            font-size: 38px;
            font-weight: 700;
            color: var(--color-text);
            margin: 0 0 16px;
            line-height: 1.3;
        }
        .hero-desc {
            font-size: 17px;
            color: var(--color-text-secondary);
            max-width: 560px;
            margin-bottom: 28px;
        }
        .hero-actions {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }
        .btn {
            padding: 10px 22px;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 15px;
            transition: var(--transition-base);
            display: inline-flex;
            align-items: center;
            gap: 8px;
            border: 1px solid transparent;
        }
        .btn:focus-visible {
            outline: 2px solid var(--color-cta);
            outline-offset: 2px;
        }
        .btn-cta {
            background: var(--color-cta);
            color: #fff;
            border-color: var(--color-cta);
        }
        .btn-cta:hover {
            background: var(--color-cta-hover);
            border-color: var(--color-cta-hover);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 6px 16px rgba(233, 129, 32, .25);
        }
        .btn-outline-primary {
            border-color: var(--color-primary);
            color: var(--color-primary);
            background: transparent;
        }
        .btn-outline-primary:hover {
            background: var(--color-primary-light);
            border-color: var(--color-primary);
            color: var(--color-primary-deep);
            transform: translateY(-1px);
        }
        .hero-quick-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 16px;
            background: #FFFFFF;
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            padding: 24px;
            box-shadow: var(--shadow-card);
        }
        .quick-card {
            display: flex;
            align-items: center;
            gap: 12px;
            background: var(--color-bg);
            border-radius: var(--radius-btn);
            padding: 14px 16px;
            color: var(--color-text);
            font-weight: 500;
            transition: var(--transition-base);
            border: 1px solid transparent;
        }
        .quick-card:hover {
            background: #FFFFFF;
            border-color: var(--color-border);
            box-shadow: var(--shadow-card-hover);
            color: var(--color-primary);
            transform: translateY(-2px);
        }
        .quick-icon {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--color-primary-light);
            color: var(--color-primary);
            font-size: 16px;
            flex-shrink: 0;
        }

        /* ============ SCENE GRID ============ */
        .scene-card {
            background: var(--color-card);
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: var(--transition-base);
            height: 100%;
            display: flex;
            flex-direction: column;
            border: 1px solid var(--color-border);
        }
        .scene-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
            border-color: rgba(47, 109, 179, .25);
        }
        .scene-card-img {
            aspect-ratio: 16 / 9;
            overflow: hidden;
            background: var(--color-img-placeholder);
        }
        .scene-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .scene-card-body {
            padding: var(--card-padding);
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .scene-tag {
            display: inline-block;
            background: var(--color-primary-light);
            color: var(--color-primary-deep);
            font-size: 12px;
            font-weight: 600;
            padding: 4px 10px;
            border-radius: var(--radius-badge);
            margin-bottom: 10px;
            width: fit-content;
        }
        .scene-card h3 {
            font-size: 20px;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--color-text);
        }
        .scene-card p {
            font-size: 14px;
            color: var(--color-text-secondary);
            margin-bottom: 16px;
            flex: 1;
        }
        .scene-link {
            font-weight: 600;
            font-size: 14px;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--color-primary);
            transition: var(--transition-base);
        }
        .scene-link:hover {
            gap: 10px;
            color: var(--color-primary-deep);
        }

        /* ============ CASE CARDS ============ */
        .case-card {
            background: #FFFFFF;
            border-radius: var(--radius-card);
            padding: var(--card-padding);
            box-shadow: var(--shadow-card);
            transition: var(--transition-base);
            border: 1px solid var(--color-border);
            height: 100%;
        }
        .case-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
        }
        .case-stat {
            display: flex;
            align-items: baseline;
            gap: 8px;
            margin-bottom: 12px;
        }
        .case-stat-value {
            font-size: 32px;
            font-weight: 700;
            color: var(--color-primary);
        }
        .case-stat-label {
            font-size: 14px;
            color: var(--color-text-secondary);
        }
        .case-card h3 {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 8px;
        }
        .case-card p {
            font-size: 14px;
            color: var(--color-text-secondary);
            margin-bottom: 12px;
        }
        .case-tag {
            display: inline-block;
            background: #F0F4F9;
            color: #4B5A6A;
            font-size: 12px;
            padding: 4px 10px;
            border-radius: var(--radius-badge);
        }

        /* ============ TOOL CARDS ============ */
        .tool-card {
            background: #FFFFFF;
            border-radius: var(--radius-card);
            padding: var(--card-padding);
            border: 1px solid var(--color-border);
            box-shadow: var(--shadow-card);
            transition: var(--transition-base);
        }
        .tool-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-card-hover);
        }
        .tool-icon {
            width: 48px;
            height: 48px;
            border-radius: 10px;
            background: var(--color-primary-light);
            color: var(--color-primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            margin-bottom: 16px;
        }
        .tool-card h3 {
            font-size: 19px;
            font-weight: 600;
            margin-bottom: 8px;
        }
        .tool-card p {
            font-size: 14px;
            color: var(--color-text-secondary);
            margin-bottom: 0;
        }

        /* ============ PRODUCT CARDS ============ */
        .product-card {
            background: var(--color-card);
            border-radius: var(--radius-card);
            padding: 20px;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--color-border);
            transition: var(--transition-base);
            display: flex;
            align-items: center;
            gap: 16px;
            height: 100%;
        }
        .product-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-card-hover);
            border-color: rgba(47, 109, 179, .25);
        }
        .product-thumb {
            width: 56px;
            height: 56px;
            border-radius: 10px;
            background: var(--color-primary-light);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            color: var(--color-primary);
            flex-shrink: 0;
        }
        .product-info h4 {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 4px;
            color: var(--color-text);
        }
        .product-info p {
            font-size: 13px;
            color: var(--color-text-secondary);
            margin-bottom: 0;
        }

        /* ============ FAQ ============ */
        .faq-section .accordion-item {
            background: #FFFFFF;
            border: 1px solid var(--color-border);
            border-radius: var(--radius-btn) !important;
            margin-bottom: 12px;
            overflow: hidden;
            box-shadow: none;
        }
        .faq-section .accordion-button {
            background: #FFFFFF;
            color: var(--color-text);
            font-weight: 600;
            font-size: 15px;
            padding: 18px 20px;
            border-radius: var(--radius-btn) !important;
            transition: var(--transition-base);
            border: none;
            box-shadow: none;
        }
        .faq-section .accordion-button:not(.collapsed) {
            background: var(--color-primary-light);
            color: var(--color-primary-deep);
            box-shadow: none;
        }
        .faq-section .accordion-button:focus {
            box-shadow: none;
            outline: 2px solid var(--color-cta);
            outline-offset: -2px;
        }
        .faq-section .accordion-button::after {
            filter: invert(30%) sepia(60%) saturate(500%);
            transition: var(--transition-base);
        }
        .faq-section .accordion-body {
            padding: 16px 20px;
            font-size: 14px;
            color: var(--color-text-secondary);
            background: #FFFFFF;
        }

        /* ============ CTA ============ */
        .cta-section {
            background: #FFFFFF;
        }
        .cta-card {
            background: linear-gradient(120deg, var(--color-primary-deep) 0%, var(--color-primary) 70%);
            border-radius: var(--radius-card);
            padding: 48px 40px;
            display: flex;
            flex-direction: column;
            align-items: flex-start;
            gap: 16px;
            color: #FFFFFF;
            box-shadow: 0 12px 32px rgba(31, 78, 122, .18);
        }
        .cta-card h2 {
            font-size: 28px;
            font-weight: 700;
            margin: 0;
            color: #FFFFFF;
            line-height: 1.35;
        }
        .cta-card p {
            font-size: 16px;
            margin: 0;
            color: rgba(255, 255, 255, .85);
            max-width: 600px;
        }
        .cta-card .btn-cta {
            background: #FFFFFF;
            color: var(--color-primary-deep);
            border-color: #FFFFFF;
            font-weight: 700;
        }
        .cta-card .btn-cta:hover {
            background: var(--color-cta);
            border-color: var(--color-cta);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(233, 129, 32, .35);
        }

        /* ============ FOOTER ============ */
        .site-footer {
            background: var(--color-footer-bg);
            color: var(--color-footer-text);
            padding: 48px 0 32px;
            font-size: 14px;
        }
        .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            color: #FFFFFF;
            font-weight: 700;
            font-size: 22px;
            margin-bottom: 16px;
        }
        .footer-desc {
            font-size: 14px;
            color: var(--color-footer-text);
            max-width: 300px;
            margin-bottom: 0;
        }
        .footer-title {
            font-size: 15px;
            font-weight: 600;
            color: #FFFFFF;
            margin-bottom: 16px;
        }
        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-links li {
            margin-bottom: 10px;
        }
        .footer-links a {
            color: var(--color-footer-text);
            font-size: 14px;
            transition: var(--transition-base);
        }
        .footer-links a:hover {
            color: #FFFFFF;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .08);
            margin-top: 32px;
            padding-top: 20px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 8px;
            font-size: 13px;
        }
        .footer-bottom a {
            color: var(--color-footer-text);
        }
        .footer-bottom a:hover {
            color: #FFFFFF;
        }
        .footer-bottom .separator {
            color: rgba(255, 255, 255, .25);
        }

        /* ============ RESPONSIVE ============ */
        @media (max-width: 991.98px) {
            :root {
                --section-gap: 56px;
                --card-padding: 24px;
            }
            .site-header .navbar-collapse {
                background: linear-gradient(135deg, var(--color-primary-deep) 0%, var(--color-primary) 100%);
                border-radius: 8px;
                padding: 12px;
                margin: 8px 0;
            }
            .site-header .navbar-nav .nav-link {
                padding: 12px 14px !important;
                color: #fff;
            }
            .nav-cta-btn {
                margin-top: 8px;
                justify-content: center;
            }
            .category-hero h1 {
                font-size: 30px;
            }
            .hero-quick-grid {
                margin-top: 24px;
            }
        }
        @media (max-width: 767.98px) {
            :root {
                --section-gap: 44px;
                --card-padding: 20px;
                --grid-gap: 16px;
            }
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .quick-card {
                padding: 12px 12px;
                font-size: 14px;
            }
            .cta-card {
                padding: 32px 24px;
            }
            .cta-card h2 {
                font-size: 22px;
            }
        }
        @media (max-width: 519.98px) {
            :root {
                --section-gap: 36px;
                --card-padding: 16px;
                --grid-gap: 12px;
            }
            .category-hero {
                padding: 32px 0;
            }
            .category-hero h1 {
                font-size: 26px;
            }
            .hero-desc {
                font-size: 15px;
            }
            .hero-quick-grid {
                grid-template-columns: 1fr;
                padding: 16px;
                gap: 10px;
            }
            .btn {
                width: 100%;
                justify-content: center;
            }
            .hero-actions {
                gap: 8px;
            }
            .product-card {
                flex-direction: column;
                align-items: flex-start;
            }
            .scene-card-body {
                padding: 16px;
            }
        }

/* roulang page: category2 */
:root {
            --color-primary: #2F6DB3;
            --color-primary-light: #EBF3FA;
            --color-primary-deep: #1F4E7A;
            --color-accent: #1FA37A;
            --color-cta: #E98120;
            --color-cta-hover: #c96e15;
            --color-bg: #F7F9FC;
            --color-card: #FFFFFF;
            --color-text: #1F2933;
            --color-text-secondary: #5B6770;
            --color-border: #E1E7EC;
            --color-footer-bg: #172636;
            --color-footer-text: #B8C2CC;
            --color-img-placeholder: #EEF2F7;
            --radius-card: 12px;
            --radius-btn: 8px;
            --radius-badge: 999px;
            --shadow-card: 0 2px 8px rgba(31, 42, 53, .06);
            --shadow-card-hover: 0 8px 24px rgba(47, 109, 179, .12);
            --shadow-nav: 0 2px 12px rgba(31, 42, 53, .08);
            --transition-base: all .25s ease;
            --font-family-base: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            --section-gap: 72px;
            --card-padding: 28px;
            --grid-gap: 24px;
        }

        @media (max-width: 991.98px) {
            :root {
                --section-gap: 56px;
            }
        }

        @media (max-width: 767.98px) {
            :root {
                --section-gap: 44px;
                --card-padding: 20px;
                --grid-gap: 16px;
            }
        }

        @media (max-width: 519.98px) {
            :root {
                --section-gap: 36px;
                --card-padding: 16px;
            }
        }

        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-family-base);
            font-size: 15px;
            line-height: 1.75;
            color: var(--color-text);
            background-color: var(--color-bg);
            margin: 0;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            text-decoration: none;
            color: var(--color-primary);
            transition: var(--transition-base);
        }
        a:hover {
            color: var(--color-primary-deep);
        }
        a:focus-visible {
            outline: 2px solid var(--color-cta);
            outline-offset: 2px;
            border-radius: 2px;
        }
        img {
            max-width: 100%;
            height: auto;
            object-fit: cover;
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }
        button:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--color-cta);
            outline-offset: 1px;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }
        section {
            padding: var(--section-gap) 0;
        }
        section.section-alt {
            background-color: #FFFFFF;
        }
        section.section-tint {
            background-color: var(--color-primary-light);
        }
        .section-label {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--color-primary);
            background: var(--color-primary-light);
            padding: 6px 14px;
            border-radius: var(--radius-badge);
            margin-bottom: 12px;
            letter-spacing: .02em;
        }
        .section-title {
            font-size: 28px;
            font-weight: 700;
            line-height: 1.35;
            color: var(--color-text);
            margin-bottom: 12px;
        }
        .section-desc {
            font-size: 16px;
            color: var(--color-text-secondary);
            max-width: 720px;
            margin-bottom: 32px;
            line-height: 1.8;
        }
        .section-desc.center {
            margin-left: auto;
            margin-right: auto;
            text-align: center;
        }

        /* ============ NAV ============ */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1030;
            background: linear-gradient(135deg, var(--color-primary-deep) 0%, var(--color-primary) 65%, #4A8AC9 100%);
            box-shadow: var(--shadow-nav);
        }
        .site-header .navbar {
            padding: 0;
        }
        .site-header .navbar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            color: #FFFFFF;
            font-weight: 700;
            font-size: 22px;
            letter-spacing: .02em;
            padding: 14px 0;
        }
        .site-header .navbar-brand:hover {
            color: #FFFFFF;
            opacity: .9;
        }
        .brand-icon {
            width: 36px;
            height: 36px;
            border-radius: 9px;
            background: rgba(255, 255, 255, .15);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: #fff;
            flex-shrink: 0;
        }
        .site-header .navbar-toggler {
            border: none;
            color: #fff;
            font-size: 24px;
            padding: 10px 0;
        }
        .site-header .navbar-toggler:focus {
            box-shadow: none;
            outline: 2px solid rgba(255, 255, 255, .5);
            outline-offset: 2px;
            border-radius: 6px;
        }
        .site-header .navbar-nav {
            gap: 4px;
        }
        .site-header .navbar-nav .nav-link {
            color: rgba(255, 255, 255, .85);
            font-size: 14px;
            font-weight: 500;
            padding: 18px 13px !important;
            border-radius: 6px;
            transition: var(--transition-base);
            letter-spacing: .01em;
            position: relative;
            white-space: nowrap;
        }
        .site-header .navbar-nav .nav-link:hover,
        .site-header .navbar-nav .nav-link.active {
            color: #FFFFFF;
            background: rgba(255, 255, 255, .12);
        }
        .nav-cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--color-cta);
            color: #FFFFFF;
            font-weight: 600;
            font-size: 14px;
            padding: 10px 22px;
            border-radius: var(--radius-btn);
            transition: var(--transition-base);
            white-space: nowrap;
            border: none;
            letter-spacing: .01em;
        }
        .nav-cta-btn:hover {
            background: var(--color-cta-hover);
            color: #FFFFFF;
            transform: translateY(-1px);
        }
        @media (max-width: 991.98px) {
            .site-header .navbar-collapse {
                background: linear-gradient(135deg, var(--color-primary-deep), var(--color-primary));
                border-radius: 0 0 12px 12px;
                padding: 12px 16px;
                margin-top: 4px;
            }
            .site-header .navbar-nav .nav-link {
                padding: 12px 14px !important;
            }
            .nav-cta-btn {
                margin: 8px 14px 12px;
                justify-content: center;
            }
        }

        /* ============ BUTTONS ============ */
        .btn-primary-custom {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--color-cta);
            color: #FFFFFF;
            font-weight: 600;
            font-size: 15px;
            padding: 12px 28px;
            border-radius: var(--radius-btn);
            border: none;
            transition: var(--transition-base);
            cursor: pointer;
            letter-spacing: .01em;
        }
        .btn-primary-custom:hover {
            background: var(--color-cta-hover);
            color: #FFFFFF;
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(233, 129, 32, .25);
        }
        .btn-outline-custom {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: transparent;
            color: var(--color-primary);
            font-weight: 600;
            font-size: 15px;
            padding: 11px 26px;
            border-radius: var(--radius-btn);
            border: 1.5px solid var(--color-primary);
            transition: var(--transition-base);
            cursor: pointer;
            letter-spacing: .01em;
        }
        .btn-outline-custom:hover {
            background: var(--color-primary-light);
            color: var(--color-primary-deep);
            border-color: var(--color-primary-deep);
            transform: translateY(-2px);
        }
        .btn-sm-action {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            font-weight: 600;
            color: var(--color-primary);
            background: var(--color-primary-light);
            padding: 8px 16px;
            border-radius: 6px;
            border: none;
            transition: var(--transition-base);
            cursor: pointer;
        }
        .btn-sm-action:hover {
            background: var(--color-primary);
            color: #fff;
        }

        /* ============ BADGES ============ */
        .badge-soft {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            font-size: 12px;
            font-weight: 600;
            color: var(--color-primary-deep);
            background: var(--color-primary-light);
            padding: 5px 12px;
            border-radius: var(--radius-badge);
            letter-spacing: .01em;
        }
        .badge-accent {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            font-size: 12px;
            font-weight: 600;
            color: #fff;
            background: var(--color-accent);
            padding: 5px 12px;
            border-radius: var(--radius-badge);
            letter-spacing: .01em;
        }
        .badge-outline {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            font-size: 12px;
            font-weight: 500;
            color: var(--color-text-secondary);
            background: #fff;
            border: 1px solid var(--color-border);
            padding: 4px 12px;
            border-radius: var(--radius-badge);
            letter-spacing: .01em;
        }

        /* ============ HERO ============ */
        .hero-solutions {
            background: linear-gradient(180deg, #F7F9FC 0%, #FFFFFF 100%);
            padding: 64px 0 56px;
            border-bottom: 1px solid var(--color-border);
        }
        .hero-solutions .hero-title {
            font-size: 38px;
            font-weight: 700;
            line-height: 1.3;
            color: var(--color-text);
            margin-bottom: 14px;
            letter-spacing: .01em;
        }
        .hero-solutions .hero-sub {
            font-size: 17px;
            color: var(--color-text-secondary);
            max-width: 640px;
            line-height: 1.8;
            margin-bottom: 20px;
        }
        .hero-solutions .hero-badges {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-bottom: 24px;
        }
        .hero-solutions .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-bottom: 20px;
        }
        .hero-solutions .hero-qualification {
            background: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            padding: 20px 24px;
            box-shadow: var(--shadow-card);
            max-width: 480px;
        }
        .hero-solutions .hero-qualification h3 {
            font-size: 16px;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 10px;
        }
        .hero-solutions .hero-qualification p {
            font-size: 14px;
            color: var(--color-text-secondary);
            margin-bottom: 0;
            line-height: 1.7;
        }
        .hero-solutions .hero-image-wrap {
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            background: var(--color-img-placeholder);
            aspect-ratio: 16/10;
        }
        .hero-solutions .hero-image-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        @media (max-width: 767.98px) {
            .hero-solutions {
                padding: 40px 0 36px;
            }
            .hero-solutions .hero-title {
                font-size: 28px;
            }
            .hero-solutions .hero-sub {
                font-size: 15px;
            }
        }

        /* ============ SOLUTION CARDS MIXED ============ */
        .solution-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .solution-card-lg {
            background: var(--color-card);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            transition: var(--transition-base);
            border: 1px solid var(--color-border);
            display: flex;
            flex-direction: column;
        }
        .solution-card-lg:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
            border-color: rgba(47, 109, 179, .3);
        }
        .solution-card-lg .solution-cover {
            aspect-ratio: 16/7;
            background: var(--color-img-placeholder);
            overflow: hidden;
            position: relative;
        }
        .solution-card-lg .solution-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .solution-card-lg .solution-body {
            padding: 24px 26px 26px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .solution-card-lg .solution-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-bottom: 10px;
        }
        .solution-card-lg h3 {
            font-size: 19px;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .solution-card-lg p {
            font-size: 14px;
            color: var(--color-text-secondary);
            line-height: 1.75;
            margin-bottom: 16px;
            flex: 1;
        }
        .solution-card-lg .solution-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--color-primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .solution-card-lg .solution-link:hover {
            color: var(--color-primary-deep);
        }
        .solution-row-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
            margin-top: 8px;
        }
        .solution-card-row {
            background: var(--color-card);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--color-border);
            padding: 20px 24px;
            display: flex;
            align-items: center;
            gap: 20px;
            transition: var(--transition-base);
        }
        .solution-card-row:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
            border-color: rgba(47, 109, 179, .3);
        }
        .solution-card-row .row-icon {
            width: 52px;
            height: 52px;
            border-radius: 10px;
            background: var(--color-primary-light);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            color: var(--color-primary);
            flex-shrink: 0;
        }
        .solution-card-row .row-content {
            flex: 1;
            min-width: 0;
        }
        .solution-card-row .row-content h4 {
            font-size: 16px;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 4px;
        }
        .solution-card-row .row-content p {
            font-size: 13px;
            color: var(--color-text-secondary);
            margin-bottom: 0;
            line-height: 1.65;
        }
        .solution-card-row .row-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
            margin-top: 6px;
        }
        @media (max-width: 767.98px) {
            .solution-grid {
                grid-template-columns: 1fr;
            }
            .solution-card-row {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
            }
            .solution-card-lg .solution-cover {
                aspect-ratio: 16/9;
            }
        }

        /* ============ COMPARISON PANEL ============ */
        .comparison-panel {
            background: var(--color-card);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--color-border);
            overflow: hidden;
        }
        .comparison-panel .comparison-header {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1fr;
            background: var(--color-primary-deep);
            color: #fff;
            font-weight: 600;
            font-size: 14px;
            padding: 16px 24px;
            gap: 12px;
        }
        .comparison-panel .comparison-row {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1fr;
            padding: 14px 24px;
            gap: 12px;
            font-size: 14px;
            border-bottom: 1px solid var(--color-border);
            align-items: center;
        }
        .comparison-panel .comparison-row:last-child {
            border-bottom: none;
        }
        .comparison-panel .comparison-row:nth-child(even) {
            background: #FAFBFD;
        }
        .comparison-panel .comparison-row .dim-label {
            font-weight: 600;
            color: var(--color-text);
        }
        .comparison-panel .comparison-row .cell-value {
            color: var(--color-text-secondary);
        }
        .comparison-panel .comparison-row .cell-highlight {
            color: var(--color-accent);
            font-weight: 600;
        }
        .comparison-panel .comparison-row .cell-check {
            color: var(--color-accent);
            font-size: 16px;
        }
        .comparison-panel .comparison-row .cell-dash {
            color: #B0B8C0;
        }
        @media (max-width: 767.98px) {
            .comparison-panel .comparison-header,
            .comparison-panel .comparison-row {
                grid-template-columns: 1fr 1fr 1fr;
                font-size: 12px;
                padding: 12px 14px;
                gap: 8px;
            }
            .comparison-panel .comparison-header .header-dim,
            .comparison-panel .comparison-row .dim-label {
                grid-column: 1 / -1;
                font-weight: 700;
                padding-bottom: 4px;
                border-bottom: 1px dashed var(--color-border);
            }
        }
        @media (max-width: 519.98px) {
            .comparison-panel .comparison-header,
            .comparison-panel .comparison-row {
                grid-template-columns: 1fr 1fr;
                font-size: 11px;
                padding: 10px 10px;
                gap: 6px;
            }
        }

        /* ============ STEPS TIMELINE ============ */
        .steps-timeline {
            display: flex;
            flex-direction: column;
            gap: 0;
            position: relative;
            padding-left: 32px;
        }
        .steps-timeline::before {
            content: '';
            position: absolute;
            left: 11px;
            top: 8px;
            bottom: 8px;
            width: 2px;
            background: var(--color-border);
        }
        .step-item {
            position: relative;
            padding: 0 0 32px 8px;
            display: flex;
            gap: 18px;
            align-items: flex-start;
        }
        .step-item:last-child {
            padding-bottom: 0;
        }
        .step-item .step-dot {
            position: absolute;
            left: -32px;
            top: 4px;
            width: 24px;
            height: 24px;
            border-radius: 50%;
            background: var(--color-primary);
            color: #fff;
            font-size: 12px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            box-shadow: 0 0 0 4px rgba(47, 109, 179, .15);
        }
        .step-item .step-content {
            flex: 1;
        }
        .step-item .step-content h4 {
            font-size: 16px;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 4px;
        }
        .step-item .step-content p {
            font-size: 14px;
            color: var(--color-text-secondary);
            margin-bottom: 0;
            line-height: 1.7;
        }

        /* ============ RESOURCE CARDS ============ */
        .resource-list {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .resource-card {
            background: var(--color-card);
            border-radius: var(--radius-card);
            border: 1px solid var(--color-border);
            padding: 24px;
            box-shadow: var(--shadow-card);
            transition: var(--transition-base);
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .resource-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
            border-color: rgba(47, 109, 179, .3);
        }
        .resource-card .resource-icon {
            width: 48px;
            height: 48px;
            border-radius: 10px;
            background: var(--color-primary-light);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: var(--color-primary);
            flex-shrink: 0;
        }
        .resource-card h4 {
            font-size: 15px;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 0;
        }
        .resource-card p {
            font-size: 13px;
            color: var(--color-text-secondary);
            margin-bottom: 0;
            line-height: 1.65;
            flex: 1;
        }
        .resource-card .resource-meta {
            font-size: 12px;
            color: #8A949E;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .resource-card .btn-sm-action {
            align-self: flex-start;
        }
        @media (max-width: 767.98px) {
            .resource-list {
                grid-template-columns: 1fr;
            }
        }

        /* ============ CASE SNIPPET ============ */
        .case-snippet-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }
        .case-snippet-card {
            background: var(--color-card);
            border-radius: var(--radius-card);
            border: 1px solid var(--color-border);
            padding: 22px 24px;
            box-shadow: var(--shadow-card);
            transition: var(--transition-base);
        }
        .case-snippet-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }
        .case-snippet-card .case-metric {
            font-size: 26px;
            font-weight: 700;
            color: var(--color-primary);
            line-height: 1.2;
            margin-bottom: 6px;
        }
        .case-snippet-card .case-label {
            font-size: 13px;
            font-weight: 600;
            color: var(--color-text);
            margin-bottom: 8px;
        }
        .case-snippet-card p {
            font-size: 13px;
            color: var(--color-text-secondary);
            margin-bottom: 12px;
            line-height: 1.7;
        }
        .case-snippet-card .case-link {
            font-size: 13px;
            font-weight: 600;
            color: var(--color-primary);
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }
        @media (max-width: 767.98px) {
            .case-snippet-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ============ CTA FORM ============ */
        .cta-form-card {
            background: linear-gradient(160deg, var(--color-primary-deep) 0%, var(--color-primary) 55%, #4A8AC9 100%);
            border-radius: var(--radius-card);
            padding: 40px 44px;
            box-shadow: 0 6px 20px rgba(31, 78, 122, .2);
            color: #fff;
        }
        .cta-form-card h2 {
            font-size: 26px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 8px;
        }
        .cta-form-card p {
            font-size: 14px;
            color: rgba(255, 255, 255, .85);
            margin-bottom: 24px;
            line-height: 1.7;
        }
        .cta-form-card .form-control {
            background: rgba(255, 255, 255, .12);
            border: 1px solid rgba(255, 255, 255, .25);
            color: #fff;
            border-radius: var(--radius-btn);
            padding: 11px 16px;
            font-size: 14px;
            transition: var(--transition-base);
        }
        .cta-form-card .form-control::placeholder {
            color: rgba(255, 255, 255, .6);
        }
        .cta-form-card .form-control:focus {
            background: rgba(255, 255, 255, .2);
            border-color: rgba(255, 255, 255, .5);
            box-shadow: none;
            outline: none;
            color: #fff;
        }
        .cta-form-card .form-select {
            background: rgba(255, 255, 255, .12);
            border: 1px solid rgba(255, 255, 255, .25);
            color: #fff;
            border-radius: var(--radius-btn);
            padding: 11px 16px;
            font-size: 14px;
        }
        .cta-form-card .form-select option {
            color: var(--color-text);
            background: #fff;
        }
        .cta-form-card .form-label {
            font-size: 13px;
            font-weight: 600;
            color: rgba(255, 255, 255, .85);
            margin-bottom: 6px;
        }
        .cta-form-card .btn-cta-form {
            background: var(--color-cta);
            color: #fff;
            font-weight: 600;
            font-size: 15px;
            padding: 12px 32px;
            border-radius: var(--radius-btn);
            border: none;
            transition: var(--transition-base);
            width: 100%;
        }
        .cta-form-card .btn-cta-form:hover {
            background: var(--color-cta-hover);
            transform: translateY(-2px);
            box-shadow: 0 4px 14px rgba(233, 129, 32, .35);
        }
        @media (max-width: 767.98px) {
            .cta-form-card {
                padding: 28px 22px;
            }
            .cta-form-card h2 {
                font-size: 22px;
            }
        }

        /* ============ FOOTER ============ */
        .site-footer {
            background: var(--color-footer-bg);
            color: var(--color-footer-text);
            padding: 56px 0 24px;
            margin-top: 0;
        }
        .site-footer .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            color: #fff;
            font-weight: 700;
            font-size: 20px;
            margin-bottom: 14px;
        }
        .site-footer .footer-brand .brand-icon {
            background: rgba(255, 255, 255, .1);
        }
        .site-footer .footer-desc {
            font-size: 13px;
            color: var(--color-footer-text);
            line-height: 1.7;
            max-width: 300px;
        }
        .site-footer .footer-title {
            font-size: 14px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: .02em;
        }
        .site-footer .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .site-footer .footer-links li {
            margin-bottom: 8px;
        }
        .site-footer .footer-links a {
            font-size: 13px;
            color: var(--color-footer-text);
            transition: var(--transition-base);
        }
        .site-footer .footer-links a:hover {
            color: #FFFFFF;
        }
        .site-footer .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .1);
            margin-top: 40px;
            padding-top: 20px;
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 13px;
            color: var(--color-footer-text);
        }
        .site-footer .footer-bottom a {
            color: var(--color-footer-text);
        }
        .site-footer .footer-bottom a:hover {
            color: #FFFFFF;
        }
        .site-footer .footer-bottom .separator {
            color: rgba(255, 255, 255, .25);
        }
        @media (max-width: 767.98px) {
            .site-footer {
                padding: 40px 0 20px;
            }
            .site-footer .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 4px;
            }
            .site-footer .footer-bottom .separator {
                display: none;
            }
        }

/* roulang page: category5 */
:root {
            --color-primary: #2F6DB3;
            --color-primary-light: #EBF3FA;
            --color-primary-deep: #1F4E7A;
            --color-accent: #1FA37A;
            --color-cta: #E98120;
            --color-cta-hover: #c96e15;
            --color-bg: #F7F9FC;
            --color-card: #FFFFFF;
            --color-text: #1F2933;
            --color-text-secondary: #5B6770;
            --color-border: #E1E7EC;
            --color-footer-bg: #172636;
            --color-footer-text: #B8C2CC;
            --color-img-placeholder: #EEF2F7;
            --radius-card: 12px;
            --radius-btn: 8px;
            --radius-badge: 999px;
            --shadow-card: 0 2px 8px rgba(31, 42, 53, .06);
            --shadow-card-hover: 0 8px 24px rgba(47, 109, 179, .12);
            --shadow-nav: 0 2px 12px rgba(31, 42, 53, .08);
            --transition-base: all .25s ease;
            --font-family-base: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            --section-gap: 72px;
            --card-padding: 28px;
            --grid-gap: 24px;
        }
        @media (max-width: 992px) {
            :root {
                --section-gap: 56px;
                --card-padding: 24px;
                --grid-gap: 20px;
            }
        }
        @media (max-width: 768px) {
            :root {
                --section-gap: 44px;
                --card-padding: 20px;
                --grid-gap: 16px;
            }
        }
        @media (max-width: 576px) {
            :root {
                --section-gap: 36px;
                --card-padding: 16px;
                --grid-gap: 12px;
            }
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-family-base);
            font-size: 15px;
            line-height: 1.75;
            color: var(--color-text);
            background-color: var(--color-bg);
            margin: 0;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            text-decoration: none;
            color: var(--color-primary);
            transition: var(--transition-base);
        }
        a:hover {
            color: var(--color-primary-deep);
        }
        a:focus-visible {
            outline: 2px solid var(--color-cta);
            outline-offset: 2px;
            border-radius: 2px;
        }
        img {
            max-width: 100%;
            height: auto;
            object-fit: cover;
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }
        button:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--color-cta);
            outline-offset: 1px;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }
        section {
            padding: var(--section-gap) 0;
        }
        section.section-alt {
            background-color: #FFFFFF;
        }
        section.section-tint {
            background-color: var(--color-primary-light);
        }
        .section-label {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--color-primary);
            background: var(--color-primary-light);
            padding: 6px 14px;
            border-radius: var(--radius-badge);
            margin-bottom: 12px;
            letter-spacing: .02em;
        }
        .section-title {
            margin-bottom: 12px;
        }
        .section-desc {
            font-size: 16px;
            color: var(--color-text-secondary);
            max-width: 720px;
            margin-bottom: 32px;
        }
        .section-desc.center {
            margin-left: auto;
            margin-right: auto;
            text-align: center;
        }
        /* ============ NAV ============ */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1030;
            background: linear-gradient(135deg, var(--color-primary-deep) 0%, var(--color-primary) 65%, #4A8AC9 100%);
            box-shadow: var(--shadow-nav);
        }
        .site-header .navbar {
            padding: 0;
        }
        .site-header .navbar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            color: #FFFFFF;
            font-weight: 700;
            font-size: 22px;
            letter-spacing: .02em;
            padding: 14px 0;
        }
        .site-header .navbar-brand:hover {
            color: #FFFFFF;
            opacity: .9;
        }
        .brand-icon {
            width: 36px;
            height: 36px;
            border-radius: 9px;
            background: rgba(255, 255, 255, .15);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: #fff;
            flex-shrink: 0;
        }
        .site-header .navbar-toggler {
            border: none;
            color: #fff;
            font-size: 24px;
            padding: 10px 0;
        }
        .site-header .navbar-toggler:focus {
            box-shadow: none;
            outline: 2px solid rgba(255, 255, 255, .5);
            outline-offset: 2px;
            border-radius: 6px;
        }
        .site-header .navbar-nav {
            gap: 4px;
        }
        .site-header .navbar-nav .nav-link {
            color: rgba(255, 255, 255, .85);
            font-size: 14px;
            font-weight: 500;
            padding: 18px 14px !important;
            border-radius: 6px;
            transition: var(--transition-base);
            letter-spacing: .01em;
            position: relative;
            white-space: nowrap;
        }
        .site-header .navbar-nav .nav-link:hover,
        .site-header .navbar-nav .nav-link.active {
            color: #FFFFFF;
            background: rgba(255, 255, 255, .12);
        }
        .site-header .navbar-nav .nav-link.active::after {
            content: '';
            position: absolute;
            left: 14px;
            right: 14px;
            bottom: 8px;
            height: 2px;
            background: #fff;
            border-radius: 2px;
        }
        .nav-cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--color-cta);
            color: #fff;
            font-weight: 600;
            font-size: 14px;
            padding: 10px 22px;
            border-radius: var(--radius-btn);
            transition: var(--transition-base);
            white-space: nowrap;
        }
        .nav-cta-btn:hover {
            background: var(--color-cta-hover);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 4px 12px rgba(233, 129, 32, .3);
        }
        @media (max-width: 991.98px) {
            .site-header .navbar-collapse {
                background: linear-gradient(135deg, var(--color-primary-deep), var(--color-primary));
                padding: 16px;
                border-radius: 0 0 12px 12px;
                margin-top: 0;
            }
            .site-header .navbar-nav .nav-link {
                padding: 12px 16px !important;
            }
            .nav-cta-btn {
                margin-top: 8px;
                justify-content: center;
            }
        }
        /* ============ HERO ============ */
        .pricing-hero {
            background: linear-gradient(180deg, #F7F9FC 0%, #FFFFFF 100%);
            padding: 64px 0 40px;
        }
        .pricing-hero-content {
            display: flex;
            align-items: center;
            gap: 48px;
        }
        .pricing-hero-text {
            flex: 1 1 50%;
        }
        .pricing-hero-text .section-label {
            margin-bottom: 16px;
        }
        .pricing-hero-text h1 {
            font-size: 40px;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 16px;
            line-height: 1.3;
        }
        .pricing-hero-text .lead {
            font-size: 17px;
            color: var(--color-text-secondary);
            margin-bottom: 28px;
            max-width: 540px;
        }
        .pricing-hero-text .hero-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }
        .pricing-hero-image {
            flex: 1 1 45%;
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card-hover);
            background: var(--color-img-placeholder);
            position: relative;
        }
        .pricing-hero-image img {
            width: 100%;
            height: 100%;
            display: block;
            aspect-ratio: 4/3;
            object-fit: cover;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: #fff;
            border: 1px solid var(--color-border);
            border-radius: var(--radius-badge);
            padding: 6px 14px;
            font-size: 13px;
            color: var(--color-primary-deep);
            box-shadow: var(--shadow-card);
            position: absolute;
            bottom: 20px;
            left: 20px;
            font-weight: 500;
        }
        .hero-badge i {
            color: var(--color-accent);
        }
        @media (max-width: 992px) {
            .pricing-hero-content {
                flex-direction: column;
                align-items: flex-start;
            }
            .pricing-hero-image {
                width: 100%;
                flex-basis: auto;
            }
        }
        @media (max-width: 576px) {
            .pricing-hero-text h1 {
                font-size: 32px;
            }
            .pricing-hero-text .lead {
                font-size: 16px;
            }
            .pricing-hero-image img {
                aspect-ratio: 16/9;
            }
        }
        /* ============ PRICE CARDS ============ */
        .price-cards-section {
            background: #FFFFFF;
        }
        .price-cards-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--grid-gap);
        }
        .pricing-card {
            background: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            padding: var(--card-padding);
            transition: var(--transition-base);
            display: flex;
            flex-direction: column;
            box-shadow: var(--shadow-card);
            position: relative;
            height: 100%;
        }
        .pricing-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
            border-color: var(--color-primary);
        }
        .pricing-card.featured {
            border: 2px solid var(--color-cta);
            box-shadow: 0 8px 28px rgba(233, 129, 32, .15);
            transform: scale(1.02);
        }
        .pricing-card.featured:hover {
            transform: scale(1.02) translateY(-4px);
        }
        .featured-flag {
            position: absolute;
            top: -14px;
            right: 20px;
            background: var(--color-cta);
            color: #fff;
            font-size: 13px;
            font-weight: 600;
            padding: 4px 14px;
            border-radius: var(--radius-badge);
            box-shadow: 0 4px 8px rgba(233, 129, 32, .2);
        }
        .pricing-card .plan-name {
            font-size: 18px;
            font-weight: 600;
            color: var(--color-primary-deep);
            margin-bottom: 8px;
        }
        .pricing-card .plan-price {
            font-size: 36px;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 4px;
        }
        .pricing-card .plan-price-unit {
            font-size: 16px;
            font-weight: 400;
            color: var(--color-text-secondary);
        }
        .pricing-card .plan-description {
            color: var(--color-text-secondary);
            font-size: 14px;
            margin: 16px 0 24px;
            min-height: 60px;
        }
        .pricing-card .plan-features {
            list-style: none;
            padding: 0;
            margin: 0 0 28px;
            flex: 1;
        }
        .pricing-card .plan-features li {
            display: flex;
            align-items: flex-start;
            gap: 8px;
            font-size: 14px;
            color: var(--color-text);
            margin-bottom: 12px;
            line-height: 1.5;
        }
        .pricing-card .plan-features li i {
            color: var(--color-accent);
            font-size: 16px;
            margin-top: 2px;
            flex-shrink: 0;
        }
        .pricing-card .btn-plan {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: transparent;
            border: 2px solid var(--color-primary);
            color: var(--color-primary);
            font-weight: 600;
            font-size: 15px;
            padding: 12px 20px;
            border-radius: var(--radius-btn);
            transition: var(--transition-base);
        }
        .pricing-card .btn-plan:hover {
            background: var(--color-primary);
            color: #fff;
        }
        .pricing-card.featured .btn-plan {
            background: var(--color-cta);
            border-color: var(--color-cta);
            color: #fff;
        }
        .pricing-card.featured .btn-plan:hover {
            background: var(--color-cta-hover);
            border-color: var(--color-cta-hover);
        }
        @media (max-width: 992px) {
            .price-cards-grid {
                grid-template-columns: 1fr;
                max-width: 520px;
                margin: 0 auto;
            }
            .pricing-card.featured {
                transform: none;
            }
            .pricing-card.featured:hover {
                transform: translateY(-4px);
            }
        }
        /* ============ COMPARISON TABLE ============ */
        .comparison-wrapper {
            background: #FFFFFF;
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            padding: 32px;
            box-shadow: var(--shadow-card);
        }
        .comparison-table {
            width: 100%;
            border-collapse: collapse;
        }
        .comparison-table th,
        .comparison-table td {
            padding: 16px 20px;
            text-align: left;
            border-bottom: 1px solid var(--color-border);
            font-size: 14px;
            vertical-align: middle;
        }
        .comparison-table th {
            background: var(--color-primary-light);
            color: var(--color-primary-deep);
            font-weight: 600;
            font-size: 15px;
        }
        .comparison-table th:first-child {
            border-radius: 8px 0 0 0;
        }
        .comparison-table th:last-child {
            border-radius: 0 8px 0 0;
        }
        .comparison-table tr:last-child td {
            border-bottom: none;
        }
        .comparison-table td:first-child {
            font-weight: 600;
            color: var(--color-text);
            width: 200px;
        }
        .comparison-table .check-icon {
            color: var(--color-accent);
            font-size: 16px;
        }
        .comparison-table .dash-icon {
            color: var(--color-text-secondary);
            font-size: 16px;
        }
        .comparison-table .highlight-col {
            background: rgba(233, 129, 32, .04);
            border-left: 2px solid var(--color-cta);
            border-right: 2px solid var(--color-cta);
        }
        @media (max-width: 768px) {
            .comparison-wrapper {
                padding: 16px;
                overflow-x: auto;
            }
            .comparison-table {
                min-width: 600px;
            }
        }
        /* ============ PAYMENT / UPGRADE ============ */
        .payment-grid,
        .upgrade-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: var(--grid-gap);
        }
        .payment-card,
        .upgrade-card {
            background: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            padding: var(--card-padding);
            box-shadow: var(--shadow-card);
            transition: var(--transition-base);
        }
        .payment-card:hover,
        .upgrade-card:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-card-hover);
            border-color: var(--color-primary);
        }
        .payment-card i,
        .upgrade-card i {
            font-size: 28px;
            color: var(--color-primary);
            margin-bottom: 16px;
            display: inline-block;
        }
        .payment-card h3,
        .upgrade-card h3 {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--color-text);
        }
        .payment-card p,
        .upgrade-card p {
            font-size: 14px;
            color: var(--color-text-secondary);
            margin-bottom: 0;
        }
        /* ============ FAQ ============ */
        .faq-section {
            background: #FFFFFF;
        }
        .accordion-item {
            background: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: 8px !important;
            margin-bottom: 16px;
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: var(--transition-base);
        }
        .accordion-item:hover {
            box-shadow: var(--shadow-card-hover);
        }
        .accordion-button {
            background: var(--color-card);
            color: var(--color-text);
            font-weight: 600;
            font-size: 16px;
            padding: 20px 24px;
            border-radius: 8px !important;
            box-shadow: none;
        }
        .accordion-button:not(.collapsed) {
            background: var(--color-primary-light);
            color: var(--color-primary-deep);
            border-bottom: 1px solid var(--color-border);
        }
        .accordion-button:focus {
            box-shadow: none;
            outline: 2px solid var(--color-cta);
            outline-offset: -2px;
        }
        .accordion-button::after {
            filter: brightness(0.5);
        }
        .accordion-body {
            padding: 20px 24px;
            font-size: 14px;
            color: var(--color-text-secondary);
            background: #fff;
        }
        /* ============ CTA ============ */
        .cta-panel {
            background: linear-gradient(135deg, var(--color-primary-deep) 0%, var(--color-primary) 100%);
            border-radius: var(--radius-card);
            padding: 56px 48px;
            color: #fff;
            box-shadow: var(--shadow-card-hover);
            text-align: center;
        }
        .cta-panel h2 {
            font-size: 34px;
            font-weight: 700;
            margin-bottom: 16px;
        }
        .cta-panel p {
            font-size: 16px;
            color: rgba(255, 255, 255, .85);
            max-width: 640px;
            margin: 0 auto 28px;
        }
        .cta-panel .btn-cta-light {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--color-cta);
            color: #fff;
            font-weight: 600;
            font-size: 16px;
            padding: 14px 32px;
            border-radius: var(--radius-btn);
            transition: var(--transition-base);
            border: none;
        }
        .cta-panel .btn-cta-light:hover {
            background: var(--color-cta-hover);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(0, 0, 0, .2);
        }
        @media (max-width: 576px) {
            .cta-panel {
                padding: 36px 24px;
            }
            .cta-panel h2 {
                font-size: 28px;
            }
        }
        /* ============ FOOTER ============ */
        .site-footer {
            background: var(--color-footer-bg);
            color: var(--color-footer-text);
            padding: 56px 0 32px;
            font-size: 14px;
        }
        .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }
        .footer-brand .brand-icon {
            background: rgba(255, 255, 255, .12);
        }
        .footer-desc {
            font-size: 14px;
            color: var(--color-footer-text);
            max-width: 320px;
            line-height: 1.7;
        }
        .footer-title {
            font-size: 16px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
        }
        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-links li {
            margin-bottom: 10px;
        }
        .footer-links a {
            color: var(--color-footer-text);
            transition: var(--transition-base);
        }
        .footer-links a:hover {
            color: #fff;
        }
        .footer-bottom {
            margin-top: 40px;
            padding-top: 24px;
            border-top: 1px solid rgba(255, 255, 255, .1);
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 8px;
            font-size: 13px;
        }
        .footer-bottom .separator {
            color: var(--color-footer-text);
        }
        .footer-bottom a {
            color: var(--color-footer-text);
        }
        .footer-bottom a:hover {
            color: #fff;
        }
        @media (max-width: 576px) {
            .site-footer {
                padding: 40px 0 24px;
            }
            .footer-brand {
                font-size: 20px;
            }
            .footer-title {
                font-size: 15px;
            }
        }
        /* ============ MISC ============ */
        .img-cover {
            width: 100%;
            height: 100%;
            display: block;
            object-fit: cover;
        }
        .text-accent {
            color: var(--color-accent) !important;
        }
        .text-primary-deep {
            color: var(--color-primary-deep) !important;
        }
        .bg-primary-light {
            background: var(--color-primary-light) !important;
        }

/* roulang page: category6 */
:root {
            --color-primary: #2F6DB3;
            --color-primary-light: #EBF3FA;
            --color-primary-deep: #1F4E7A;
            --color-accent: #1FA37A;
            --color-cta: #E98120;
            --color-cta-hover: #c96e15;
            --color-bg: #F7F9FC;
            --color-card: #FFFFFF;
            --color-text: #1F2933;
            --color-text-secondary: #5B6770;
            --color-border: #E1E7EC;
            --color-footer-bg: #172636;
            --color-footer-text: #B8C2CC;
            --color-img-placeholder: #EEF2F7;
            --radius-card: 12px;
            --radius-btn: 8px;
            --radius-badge: 999px;
            --shadow-card: 0 2px 8px rgba(31, 42, 53, .06);
            --shadow-card-hover: 0 8px 24px rgba(47, 109, 179, .12);
            --shadow-nav: 0 2px 12px rgba(31, 42, 53, .08);
            --transition-base: all .25s ease;
            --font-family-base: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            --section-gap: 72px;
            --card-padding: 28px;
            --grid-gap: 24px;
        }
        @media (max-width: 991.98px) {
            :root {
                --section-gap: 56px;
            }
        }
        @media (max-width: 767.98px) {
            :root {
                --section-gap: 44px;
                --card-padding: 20px;
                --grid-gap: 16px;
            }
        }
        @media (max-width: 575.98px) {
            :root {
                --section-gap: 36px;
                --card-padding: 16px;
            }
        }

        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-family-base);
            font-size: 15px;
            line-height: 1.75;
            color: var(--color-text);
            background-color: var(--color-bg);
            margin: 0;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            text-decoration: none;
            color: var(--color-primary);
            transition: var(--transition-base);
        }
        a:hover {
            color: var(--color-primary-deep);
        }
        a:focus-visible {
            outline: 2px solid var(--color-cta);
            outline-offset: 2px;
            border-radius: 2px;
        }
        img {
            max-width: 100%;
            height: auto;
            object-fit: cover;
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }
        button:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--color-cta);
            outline-offset: 1px;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }
        section {
            padding: var(--section-gap) 0;
        }
        section.section-alt {
            background-color: #FFFFFF;
        }
        section.section-tint {
            background-color: var(--color-primary-light);
        }
        .section-label {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--color-primary);
            background: var(--color-primary-light);
            padding: 6px 14px;
            border-radius: var(--radius-badge);
            margin-bottom: 12px;
            letter-spacing: .02em;
        }
        .section-title {
            margin-bottom: 12px;
            font-weight: 700;
            color: var(--color-text);
            line-height: 1.35;
        }
        .section-desc {
            font-size: 16px;
            color: var(--color-text-secondary);
            max-width: 720px;
            margin-bottom: 32px;
            line-height: 1.7;
        }
        .section-desc.center {
            margin-left: auto;
            margin-right: auto;
            text-align: center;
        }

        /* ============ NAV ============ */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1030;
            background: linear-gradient(135deg, var(--color-primary-deep) 0%, var(--color-primary) 65%, #4A8AC9 100%);
            box-shadow: var(--shadow-nav);
        }
        .site-header .navbar {
            padding: 0;
        }
        .site-header .navbar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            color: #FFFFFF;
            font-weight: 700;
            font-size: 22px;
            letter-spacing: .02em;
            padding: 14px 0;
        }
        .site-header .navbar-brand:hover {
            color: #FFFFFF;
            opacity: .9;
        }
        .brand-icon {
            width: 36px;
            height: 36px;
            border-radius: 9px;
            background: rgba(255, 255, 255, .15);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: #fff;
            flex-shrink: 0;
        }
        .site-header .navbar-toggler {
            border: none;
            color: #fff;
            font-size: 24px;
            padding: 10px 0;
        }
        .site-header .navbar-toggler:focus {
            box-shadow: none;
            outline: 2px solid rgba(255, 255, 255, .5);
            outline-offset: 2px;
            border-radius: 6px;
        }
        .site-header .navbar-nav {
            gap: 4px;
        }
        .site-header .navbar-nav .nav-link {
            color: rgba(255, 255, 255, .85);
            font-size: 14px;
            font-weight: 500;
            padding: 18px 14px !important;
            border-radius: 6px;
            transition: var(--transition-base);
            letter-spacing: .01em;
            position: relative;
            white-space: nowrap;
        }
        .site-header .navbar-nav .nav-link:hover,
        .site-header .navbar-nav .nav-link.active {
            color: #FFFFFF;
            background: rgba(255, 255, 255, .12);
        }
        .site-header .navbar-nav .nav-link.active::after {
            content: '';
            position: absolute;
            left: 14px;
            right: 14px;
            bottom: 10px;
            height: 2px;
            background: #FFFFFF;
            border-radius: 2px;
        }
        .nav-cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--color-cta);
            color: #FFFFFF;
            font-size: 14px;
            font-weight: 600;
            padding: 10px 20px;
            border-radius: var(--radius-btn);
            transition: var(--transition-base);
            white-space: nowrap;
        }
        .nav-cta-btn:hover {
            background: var(--color-cta-hover);
            color: #FFFFFF;
            transform: translateY(-1px);
        }
        .nav-cta-btn i {
            font-size: 14px;
        }
        @media (max-width: 991.98px) {
            .site-header .navbar-collapse {
                background: linear-gradient(135deg, var(--color-primary-deep) 0%, var(--color-primary) 100%);
                border-radius: 0 0 12px 12px;
                padding: 12px 16px 20px;
                margin-top: 4px;
            }
            .site-header .navbar-nav .nav-link {
                padding: 12px 14px !important;
            }
            .site-header .navbar-nav .nav-link.active::after {
                display: none;
            }
            .nav-cta-btn {
                margin-top: 8px;
                justify-content: center;
                width: 100%;
            }
        }

        /* ============ PAGE HERO ============ */
        .page-hero {
            background: linear-gradient(180deg, var(--color-primary-light) 0%, var(--color-bg) 100%);
            padding: 48px 0 32px;
            border-bottom: 1px solid var(--color-border);
        }
        .page-hero .page-breadcrumb {
            font-size: 13px;
            color: var(--color-text-secondary);
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: wrap;
        }
        .page-hero .page-breadcrumb a {
            color: var(--color-primary);
            font-weight: 500;
        }
        .page-hero .page-breadcrumb a:hover {
            color: var(--color-primary-deep);
        }
        .page-hero .page-breadcrumb .sep {
            color: var(--color-border);
        }
        .page-hero h1 {
            font-size: 36px;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 12px;
            line-height: 1.3;
        }
        .page-hero .page-hero-desc {
            font-size: 16px;
            color: var(--color-text-secondary);
            max-width: 720px;
            line-height: 1.7;
        }

        /* ============ NEWS LIST ============ */
        .news-list-section {
            background: var(--color-bg);
        }
        .news-main-card {
            background: var(--color-card);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: var(--card-padding);
            margin-bottom: var(--grid-gap);
            transition: var(--transition-base);
            border: 1px solid var(--color-border);
            display: flex;
            gap: 20px;
            align-items: flex-start;
        }
        .news-main-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
            border-color: rgba(47, 109, 179, .25);
        }
        .news-main-card .news-cover {
            width: 200px;
            min-width: 200px;
            height: 130px;
            border-radius: 8px;
            overflow: hidden;
            background: var(--color-img-placeholder);
            flex-shrink: 0;
        }
        .news-main-card .news-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition-base);
        }
        .news-main-card:hover .news-cover img {
            transform: scale(1.03);
        }
        .news-main-card .news-content {
            flex: 1;
            min-width: 0;
        }
        .news-main-card .news-date {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            color: var(--color-text-secondary);
            background: var(--color-primary-light);
            padding: 4px 12px;
            border-radius: var(--radius-badge);
            margin-bottom: 10px;
            font-weight: 500;
        }
        .news-main-card .news-date i {
            font-size: 12px;
            color: var(--color-primary);
        }
        .news-main-card .news-title {
            font-size: 20px;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 10px;
            line-height: 1.4;
        }
        .news-main-card .news-summary {
            font-size: 15px;
            color: var(--color-text-secondary);
            margin-bottom: 14px;
            line-height: 1.7;
        }
        .news-main-card .btn-read {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: var(--color-primary);
            background: var(--color-primary-light);
            border: 1px solid rgba(47, 109, 179, .2);
            padding: 8px 18px;
            border-radius: var(--radius-btn);
            transition: var(--transition-base);
        }
        .news-main-card .btn-read:hover {
            background: var(--color-primary);
            color: #FFFFFF;
            border-color: var(--color-primary);
        }

        /* ============ HOT TAGS ============ */
        .hot-tags-section {
            background: #FFFFFF;
        }
        .hot-tags-wrapper {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }
        .hot-tag-item {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--color-primary-light);
            color: var(--color-primary-deep);
            font-size: 14px;
            font-weight: 500;
            padding: 10px 18px;
            border-radius: var(--radius-badge);
            border: 1px solid rgba(47, 109, 179, .15);
            transition: var(--transition-base);
        }
        .hot-tag-item:hover {
            background: var(--color-primary);
            color: #FFFFFF;
            border-color: var(--color-primary);
            transform: translateY(-1px);
        }
        .hot-tag-item i {
            font-size: 13px;
        }

        /* ============ TOPICS ============ */
        .topics-section {
            background: var(--color-bg);
        }
        .topic-card {
            background: var(--color-card);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            transition: var(--transition-base);
            border: 1px solid var(--color-border);
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .topic-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
            border-color: rgba(47, 109, 179, .25);
        }
        .topic-card .topic-cover {
            width: 100%;
            height: 160px;
            background: var(--color-img-placeholder);
            overflow: hidden;
        }
        .topic-card .topic-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition-base);
        }
        .topic-card:hover .topic-cover img {
            transform: scale(1.04);
        }
        .topic-card .topic-body {
            padding: 20px 24px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .topic-card .topic-tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            color: var(--color-accent);
            background: rgba(31, 163, 122, .1);
            padding: 4px 12px;
            border-radius: var(--radius-badge);
            margin-bottom: 10px;
            align-self: flex-start;
        }
        .topic-card .topic-title {
            font-size: 18px;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .topic-card .topic-desc {
            font-size: 14px;
            color: var(--color-text-secondary);
            line-height: 1.7;
            margin-bottom: 16px;
            flex: 1;
        }
        .topic-card .topic-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--color-primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .topic-card .topic-link:hover {
            color: var(--color-primary-deep);
        }

        /* ============ SUBSCRIBE ============ */
        .subscribe-section {
            background: linear-gradient(135deg, var(--color-primary-deep) 0%, var(--color-primary) 60%, #4A8AC9 100%);
            border-radius: 0;
        }
        .subscribe-card {
            background: rgba(255, 255, 255, .08);
            border: 1px solid rgba(255, 255, 255, .15);
            border-radius: var(--radius-card);
            padding: 40px;
            text-align: center;
            color: #FFFFFF;
        }
        .subscribe-card .subscribe-title {
            font-size: 28px;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 12px;
            line-height: 1.35;
        }
        .subscribe-card .subscribe-desc {
            font-size: 16px;
            color: rgba(255, 255, 255, .85);
            max-width: 600px;
            margin: 0 auto 24px;
            line-height: 1.7;
        }
        .subscribe-form {
            display: flex;
            gap: 12px;
            max-width: 480px;
            margin: 0 auto;
            flex-wrap: wrap;
            justify-content: center;
        }
        .subscribe-form input {
            flex: 1;
            min-width: 200px;
            padding: 12px 18px;
            border-radius: var(--radius-btn);
            border: 1px solid rgba(255, 255, 255, .25);
            background: rgba(255, 255, 255, .95);
            color: var(--color-text);
            font-size: 14px;
            transition: var(--transition-base);
        }
        .subscribe-form input:focus {
            outline: 2px solid var(--color-cta);
            outline-offset: 1px;
            border-color: transparent;
        }
        .subscribe-form .btn-subscribe {
            background: var(--color-cta);
            color: #FFFFFF;
            border: none;
            padding: 12px 28px;
            border-radius: var(--radius-btn);
            font-size: 15px;
            font-weight: 600;
            transition: var(--transition-base);
            white-space: nowrap;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .subscribe-form .btn-subscribe:hover {
            background: var(--color-cta-hover);
            transform: translateY(-1px);
        }

        /* ============ ANNOUNCEMENTS ============ */
        .announce-section {
            background: #FFFFFF;
        }
        .announce-item {
            display: flex;
            align-items: flex-start;
            gap: 16px;
            padding: 18px 20px;
            border: 1px solid var(--color-border);
            border-radius: 10px;
            margin-bottom: 12px;
            background: var(--color-bg);
            transition: var(--transition-base);
        }
        .announce-item:hover {
            background: var(--color-primary-light);
            border-color: rgba(47, 109, 179, .2);
        }
        .announce-item .announce-icon {
            width: 40px;
            height: 40px;
            border-radius: 8px;
            background: var(--color-primary);
            color: #FFFFFF;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            flex-shrink: 0;
        }
        .announce-item .announce-content {
            flex: 1;
            min-width: 0;
        }
        .announce-item .announce-date {
            font-size: 12px;
            color: var(--color-text-secondary);
            font-weight: 500;
            margin-bottom: 4px;
        }
        .announce-item .announce-text {
            font-size: 15px;
            color: var(--color-text);
            line-height: 1.6;
        }

        /* ============ CTA ============ */
        .cta-section {
            background: var(--color-bg);
        }
        .cta-panel {
            background: linear-gradient(135deg, var(--color-primary-deep) 0%, var(--color-primary) 100%);
            border-radius: var(--radius-card);
            padding: 48px 40px;
            text-align: center;
            color: #FFFFFF;
            box-shadow: var(--shadow-card-hover);
        }
        .cta-panel .cta-title {
            font-size: 30px;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 12px;
            line-height: 1.35;
        }
        .cta-panel .cta-desc {
            font-size: 16px;
            color: rgba(255, 255, 255, .85);
            max-width: 600px;
            margin: 0 auto 24px;
            line-height: 1.7;
        }
        .cta-panel .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--color-cta);
            color: #FFFFFF;
            border: none;
            padding: 14px 36px;
            border-radius: var(--radius-btn);
            font-size: 16px;
            font-weight: 600;
            transition: var(--transition-base);
        }
        .cta-panel .btn-cta:hover {
            background: var(--color-cta-hover);
            transform: translateY(-2px);
        }

        /* ============ FOOTER ============ */
        .site-footer {
            background: var(--color-footer-bg);
            padding: 56px 0 24px;
            color: var(--color-footer-text);
        }
        .site-footer .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 16px;
        }
        .site-footer .footer-brand .brand-icon {
            background: rgba(255, 255, 255, .1);
        }
        .site-footer .footer-desc {
            font-size: 14px;
            color: var(--color-footer-text);
            line-height: 1.7;
            max-width: 300px;
        }
        .site-footer .footer-title {
            font-size: 15px;
            font-weight: 600;
            color: #FFFFFF;
            margin-bottom: 16px;
        }
        .site-footer .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .site-footer .footer-links li {
            margin-bottom: 10px;
        }
        .site-footer .footer-links a {
            color: var(--color-footer-text);
            font-size: 14px;
            transition: var(--transition-base);
        }
        .site-footer .footer-links a:hover {
            color: #FFFFFF;
        }
        .site-footer .footer-bottom {
            margin-top: 40px;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, .1);
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 13px;
        }
        .site-footer .footer-bottom a {
            color: var(--color-footer-text);
        }
        .site-footer .footer-bottom a:hover {
            color: #FFFFFF;
        }
        .site-footer .footer-bottom .separator {
            color: rgba(255, 255, 255, .3);
            margin: 0 4px;
        }

        /* ============ RESPONSIVE ============ */
        @media (max-width: 767.98px) {
            .page-hero h1 {
                font-size: 28px;
            }
            .news-main-card {
                flex-direction: column;
                gap: 14px;
            }
            .news-main-card .news-cover {
                width: 100%;
                min-width: unset;
                height: 180px;
            }
            .news-main-card .news-title {
                font-size: 18px;
            }
            .topic-card .topic-cover {
                height: 140px;
            }
            .subscribe-card {
                padding: 24px 20px;
            }
            .subscribe-card .subscribe-title {
                font-size: 22px;
            }
            .cta-panel {
                padding: 32px 24px;
            }
            .cta-panel .cta-title {
                font-size: 24px;
            }
        }
        @media (max-width: 575.98px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .page-hero {
                padding: 32px 0 24px;
            }
            .page-hero h1 {
                font-size: 24px;
            }
            .news-main-card {
                padding: 16px;
            }
            .news-main-card .news-cover {
                height: 150px;
            }
            .news-main-card .news-summary {
                font-size: 14px;
            }
            .subscribe-form {
                flex-direction: column;
            }
            .subscribe-form input {
                min-width: unset;
                width: 100%;
            }
            .subscribe-form .btn-subscribe {
                width: 100%;
                justify-content: center;
            }
            .site-footer .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 4px;
            }
        }

/* roulang page: category4 */
:root {
            --color-primary: #2F6DB3;
            --color-primary-light: #EBF3FA;
            --color-primary-deep: #1F4E7A;
            --color-accent: #1FA37A;
            --color-cta: #E98120;
            --color-cta-hover: #c96e15;
            --color-bg: #F7F9FC;
            --color-card: #FFFFFF;
            --color-text: #1F2933;
            --color-text-secondary: #5B6770;
            --color-border: #E1E7EC;
            --color-footer-bg: #172636;
            --color-footer-text: #B8C2CC;
            --color-img-placeholder: #EEF2F7;
            --radius-card: 12px;
            --radius-btn: 8px;
            --radius-badge: 999px;
            --shadow-card: 0 2px 8px rgba(31, 42, 53, .06);
            --shadow-card-hover: 0 8px 24px rgba(47, 109, 179, .12);
            --shadow-nav: 0 2px 12px rgba(31, 42, 53, .08);
            --transition-base: all .25s ease;
            --font-family-base: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            --section-gap: 72px;
            --card-padding: 28px;
            --grid-gap: 24px;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-family-base);
            font-size: 15px;
            line-height: 1.75;
            color: var(--color-text);
            background-color: var(--color-bg);
            margin: 0;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        a {
            text-decoration: none;
            color: var(--color-primary);
            transition: var(--transition-base);
        }
        a:hover {
            color: var(--color-primary-deep);
        }
        a:focus-visible {
            outline: 2px solid var(--color-cta);
            outline-offset: 2px;
            border-radius: 2px;
        }

        img {
            max-width: 100%;
            height: auto;
            object-fit: cover;
        }

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }
        button:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--color-cta);
            outline-offset: 1px;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        section {
            padding: var(--section-gap) 0;
        }
        section.section-alt {
            background-color: #FFFFFF;
        }
        section.section-tint {
            background-color: var(--color-primary-light);
        }

        .section-label {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--color-primary);
            background: var(--color-primary-light);
            padding: 6px 14px;
            border-radius: var(--radius-badge);
            margin-bottom: 12px;
            letter-spacing: .02em;
        }

        .section-title {
            margin-bottom: 12px;
            font-weight: 700;
            font-size: 28px;
            line-height: 1.35;
            color: var(--color-text);
        }

        .section-desc {
            font-size: 16px;
            color: var(--color-text-secondary);
            max-width: 720px;
            margin-bottom: 32px;
            line-height: 1.7;
        }
        .section-desc.center {
            margin-left: auto;
            margin-right: auto;
            text-align: center;
        }

        /* ============ NAV ============ */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1030;
            background: linear-gradient(135deg, var(--color-primary-deep) 0%, var(--color-primary) 65%, #4A8AC9 100%);
            box-shadow: var(--shadow-nav);
        }
        .site-header .navbar {
            padding: 0;
        }
        .site-header .navbar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            color: #FFFFFF;
            font-weight: 700;
            font-size: 22px;
            letter-spacing: .02em;
            padding: 14px 0;
        }
        .site-header .navbar-brand:hover {
            color: #FFFFFF;
            opacity: .9;
        }
        .brand-icon {
            width: 36px;
            height: 36px;
            border-radius: 9px;
            background: rgba(255, 255, 255, .15);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: #fff;
            flex-shrink: 0;
        }
        .site-header .navbar-toggler {
            border: none;
            color: #fff;
            font-size: 24px;
            padding: 10px 0;
        }
        .site-header .navbar-toggler:focus {
            box-shadow: none;
            outline: 2px solid rgba(255, 255, 255, .5);
            outline-offset: 2px;
            border-radius: 6px;
        }
        .site-header .navbar-nav {
            gap: 4px;
        }
        .site-header .navbar-nav .nav-link {
            color: rgba(255, 255, 255, .85);
            font-size: 14px;
            font-weight: 500;
            padding: 18px 14px !important;
            border-radius: 6px;
            transition: var(--transition-base);
            letter-spacing: .01em;
            position: relative;
            white-space: nowrap;
        }
        .site-header .navbar-nav .nav-link:hover,
        .site-header .navbar-nav .nav-link.active {
            color: #FFFFFF;
            background: rgba(255, 255, 255, .12);
        }
        .nav-cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--color-cta);
            color: #FFFFFF;
            font-size: 14px;
            font-weight: 600;
            padding: 10px 20px;
            border-radius: var(--radius-btn);
            transition: var(--transition-base);
            white-space: nowrap;
            border: none;
        }
        .nav-cta-btn:hover {
            background: var(--color-cta-hover);
            color: #FFFFFF;
            transform: translateY(-1px);
            box-shadow: 0 6px 16px rgba(233, 129, 32, .35);
        }
        .nav-cta-btn i {
            font-size: 13px;
        }

        /* ============ PAGE HEADER ============ */
        .page-header {
            position: relative;
            background-color: var(--color-bg);
            padding: 48px 0 40px;
            overflow: hidden;
        }
        .page-header::before {
            content: "";
            position: absolute;
            top: -120px;
            right: -120px;
            width: 420px;
            height: 420px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(47, 109, 179, .08) 0%, transparent 70%);
            pointer-events: none;
        }
        .page-header .breadcrumb-wrap {
            margin-bottom: 16px;
            position: relative;
            z-index: 1;
        }
        .breadcrumb-custom {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--color-text-secondary);
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .breadcrumb-custom li {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .breadcrumb-custom a {
            color: var(--color-primary);
            font-weight: 500;
        }
        .breadcrumb-custom a:hover {
            color: var(--color-primary-deep);
        }
        .breadcrumb-custom .separator {
            color: var(--color-border);
            font-size: 12px;
        }
        .breadcrumb-custom .current {
            color: var(--color-text-secondary);
        }
        .page-header h1 {
            font-size: 38px;
            font-weight: 700;
            line-height: 1.25;
            margin-bottom: 14px;
            color: var(--color-text);
            position: relative;
            z-index: 1;
        }
        .page-header .page-subtitle {
            font-size: 16px;
            color: var(--color-text-secondary);
            max-width: 680px;
            line-height: 1.7;
            position: relative;
            z-index: 1;
        }

        /* ============ CASE CARDS ============ */
        .case-card {
            background: var(--color-card);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            transition: var(--transition-base);
            height: 100%;
            display: flex;
            flex-direction: column;
            border: 1px solid var(--color-border);
        }
        .case-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
            border-color: rgba(47, 109, 179, .4);
        }
        .case-card .card-img-wrap {
            position: relative;
            aspect-ratio: 16 / 9;
            overflow: hidden;
            background: var(--color-img-placeholder);
        }
        .case-card .card-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition-base);
        }
        .case-card:hover .card-img-wrap img {
            transform: scale(1.03);
        }
        .case-card .case-tag {
            position: absolute;
            top: 16px;
            left: 16px;
            background: rgba(255, 255, 255, .92);
            color: var(--color-primary);
            font-size: 12px;
            font-weight: 600;
            padding: 6px 14px;
            border-radius: var(--radius-badge);
            letter-spacing: .02em;
            box-shadow: 0 2px 8px rgba(31, 42, 53, .08);
        }
        .case-card .card-body {
            padding: var(--card-padding);
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .case-card .case-metric-row {
            display: flex;
            gap: 18px;
            flex-wrap: wrap;
            margin-bottom: 14px;
        }
        .case-card .metric-item {
            display: flex;
            align-items: baseline;
            gap: 4px;
            font-size: 13px;
            color: var(--color-text-secondary);
        }
        .case-card .metric-item .metric-value {
            font-size: 20px;
            font-weight: 700;
            color: var(--color-primary);
            line-height: 1;
        }
        .case-card .metric-item .metric-unit {
            font-size: 13px;
            font-weight: 500;
            color: var(--color-text-secondary);
        }
        .case-card .card-title {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--color-text);
            line-height: 1.4;
        }
        .case-card .card-text {
            font-size: 14px;
            color: var(--color-text-secondary);
            line-height: 1.7;
            margin-bottom: 16px;
            flex: 1;
        }
        .case-card .card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: var(--color-primary);
            transition: var(--transition-base);
            align-self: flex-start;
        }
        .case-card .card-link:hover {
            color: var(--color-primary-deep);
            gap: 10px;
        }
        .case-card .card-link i {
            font-size: 12px;
        }

        /* ============ METRICS STRIP ============ */
        .metrics-strip {
            background: linear-gradient(135deg, var(--color-primary-deep) 0%, var(--color-primary) 60%, #4A8AC9 100%);
            border-radius: var(--radius-card);
            padding: 36px 32px;
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            box-shadow: 0 12px 32px rgba(31, 78, 122, .18);
        }
        .metrics-strip .metric-block {
            text-align: center;
            color: #fff;
        }
        .metrics-strip .metric-block .metric-number {
            font-size: 38px;
            font-weight: 700;
            line-height: 1.2;
            margin-bottom: 4px;
        }
        .metrics-strip .metric-block .metric-label {
            font-size: 14px;
            font-weight: 500;
            opacity: .88;
        }

        /* ============ TESTIMONIALS ============ */
        .testimonial-card {
            background: var(--color-card);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 28px;
            border-left: 4px solid var(--color-accent);
            transition: var(--transition-base);
            height: 100%;
        }
        .testimonial-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }
        .testimonial-card .quote-icon {
            color: var(--color-accent);
            font-size: 22px;
            margin-bottom: 12px;
            display: block;
        }
        .testimonial-card .quote-text {
            font-size: 15px;
            color: var(--color-text);
            line-height: 1.7;
            margin-bottom: 16px;
        }
        .testimonial-card .quote-author {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            font-weight: 600;
            color: var(--color-text-secondary);
        }
        .testimonial-card .quote-author .author-avatar {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--color-primary-light);
            color: var(--color-primary);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 15px;
            font-weight: 700;
            flex-shrink: 0;
        }

        /* ============ PROCESS STEPS ============ */
        .process-flow {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            position: relative;
        }
        .process-flow::before {
            content: "";
            position: absolute;
            top: 28px;
            left: 12.5%;
            right: 12.5%;
            height: 2px;
            background: var(--color-border);
            z-index: 0;
        }
        .process-step {
            text-align: center;
            position: relative;
            z-index: 1;
        }
        .process-step .step-number {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--color-card);
            border: 2px solid var(--color-primary);
            color: var(--color-primary);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            font-weight: 700;
            margin-bottom: 14px;
            box-shadow: 0 4px 12px rgba(47, 109, 179, .15);
            transition: var(--transition-base);
        }
        .process-step:hover .step-number {
            background: var(--color-primary);
            color: #fff;
            transform: translateY(-3px);
            box-shadow: 0 8px 20px rgba(47, 109, 179, .25);
        }
        .process-step .step-title {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--color-text);
        }
        .process-step .step-desc {
            font-size: 13px;
            color: var(--color-text-secondary);
            line-height: 1.6;
        }

        /* ============ RELATED SOLUTIONS ============ */
        .solution-mini-card {
            background: var(--color-card);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 24px;
            transition: var(--transition-base);
            height: 100%;
            display: flex;
            flex-direction: column;
            border: 1px solid var(--color-border);
        }
        .solution-mini-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
            border-color: rgba(47, 109, 179, .4);
        }
        .solution-mini-card .solution-icon {
            width: 44px;
            height: 44px;
            border-radius: 10px;
            background: var(--color-primary-light);
            color: var(--color-primary);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            margin-bottom: 14px;
        }
        .solution-mini-card .solution-name {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--color-text);
        }
        .solution-mini-card .solution-desc {
            font-size: 13px;
            color: var(--color-text-secondary);
            line-height: 1.6;
            margin-bottom: 14px;
            flex: 1;
        }
        .solution-mini-card .solution-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: var(--color-primary);
        }
        .solution-mini-card .solution-link:hover {
            color: var(--color-primary-deep);
            gap: 10px;
        }

        /* ============ FAQ ============ */
        .faq-wrap .accordion-item {
            border: 1px solid var(--color-border);
            border-radius: 10px !important;
            margin-bottom: 12px;
            overflow: hidden;
            box-shadow: var(--shadow-card);
            background: var(--color-card);
        }
        .faq-wrap .accordion-button {
            background: var(--color-card);
            color: var(--color-text);
            font-weight: 600;
            font-size: 15px;
            padding: 18px 22px;
            border-radius: 10px !important;
            box-shadow: none;
            transition: var(--transition-base);
        }
        .faq-wrap .accordion-button:not(.collapsed) {
            background: var(--color-primary-light);
            color: var(--color-primary-deep);
            box-shadow: none;
        }
        .faq-wrap .accordion-button:focus {
            box-shadow: none;
            outline: 2px solid var(--color-cta);
            outline-offset: -2px;
        }
        .faq-wrap .accordion-button::after {
            filter: invert(35%) sepia(15%) saturate(900%) hue-rotate(185deg);
        }
        .faq-wrap .accordion-body {
            padding: 18px 22px;
            font-size: 14px;
            color: var(--color-text-secondary);
            line-height: 1.7;
            background: #fff;
        }

        /* ============ CTA SECTION ============ */
        .cta-banner {
            background: linear-gradient(135deg, var(--color-primary-deep) 0%, var(--color-primary) 70%, #4A8AC9 100%);
            border-radius: var(--radius-card);
            padding: 48px 40px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            flex-wrap: wrap;
            box-shadow: 0 12px 36px rgba(31, 78, 122, .22);
        }
        .cta-banner .cta-content {
            flex: 1;
            min-width: 260px;
        }
        .cta-banner .cta-title {
            font-size: 26px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 8px;
            line-height: 1.3;
        }
        .cta-banner .cta-desc {
            font-size: 15px;
            color: rgba(255, 255, 255, .85);
            line-height: 1.65;
            margin-bottom: 0;
        }
        .cta-banner .cta-action {
            flex-shrink: 0;
        }
        .btn-cta-white {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: #FFFFFF;
            color: var(--color-primary-deep);
            font-size: 15px;
            font-weight: 700;
            padding: 14px 28px;
            border-radius: var(--radius-btn);
            transition: var(--transition-base);
            border: none;
        }
        .btn-cta-white:hover {
            background: var(--color-cta);
            color: #FFFFFF;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(233, 129, 32, .35);
        }
        .btn-cta-white i {
            font-size: 14px;
        }

        /* ============ FOOTER ============ */
        .site-footer {
            background: var(--color-footer-bg);
            color: var(--color-footer-text);
            padding: 56px 0 28px;
            margin-top: 0;
        }
        .site-footer .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            color: #fff;
            font-weight: 700;
            font-size: 20px;
            margin-bottom: 14px;
        }
        .site-footer .footer-brand .brand-icon {
            background: rgba(255, 255, 255, .12);
            color: #fff;
        }
        .site-footer .footer-desc {
            font-size: 14px;
            color: var(--color-footer-text);
            line-height: 1.7;
            max-width: 280px;
            margin-bottom: 0;
        }
        .site-footer .footer-title {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 14px;
            letter-spacing: .02em;
        }
        .site-footer .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .site-footer .footer-links li {
            margin-bottom: 8px;
        }
        .site-footer .footer-links a {
            color: var(--color-footer-text);
            font-size: 14px;
            transition: var(--transition-base);
        }
        .site-footer .footer-links a:hover {
            color: #fff;
            padding-left: 3px;
        }
        .site-footer .footer-bottom {
            margin-top: 40px;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, .1);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 13px;
            color: var(--color-footer-text);
        }
        .site-footer .footer-bottom a {
            color: var(--color-footer-text);
            transition: var(--transition-base);
        }
        .site-footer .footer-bottom a:hover {
            color: #fff;
        }
        .site-footer .footer-bottom .separator {
            opacity: .5;
        }

        /* ============ RESPONSIVE ============ */
        @media (max-width: 1024px) {
            .process-flow {
                grid-template-columns: repeat(2, 1fr);
                gap: 32px;
            }
            .process-flow::before {
                display: none;
            }
            .metrics-strip {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
                padding: 28px 24px;
            }
            .metrics-strip .metric-block .metric-number {
                font-size: 30px;
            }
        }

        @media (max-width: 992px) {
            .site-header .navbar-nav {
                padding: 12px 0;
                background: rgba(31, 78, 122, .98);
                border-radius: 10px;
                margin-top: 8px;
                padding-left: 16px;
                padding-right: 16px;
            }
            .site-header .navbar-nav .nav-link {
                padding: 10px 14px !important;
            }
            .nav-cta-btn {
                display: none;
            }
            .page-header h1 {
                font-size: 32px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --section-gap: 48px;
                --card-padding: 20px;
                --grid-gap: 16px;
            }
            section {
                padding: var(--section-gap) 0;
            }
            .section-title {
                font-size: 24px;
            }
            .page-header {
                padding: 32px 0 28px;
            }
            .page-header h1 {
                font-size: 28px;
            }
            .metrics-strip {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
                padding: 24px 18px;
            }
            .metrics-strip .metric-block .metric-number {
                font-size: 26px;
            }
            .testimonial-card {
                padding: 20px;
            }
            .cta-banner {
                padding: 32px 24px;
                flex-direction: column;
                text-align: center;
                gap: 20px;
            }
            .cta-banner .cta-title {
                font-size: 22px;
            }
            .site-footer {
                padding: 40px 0 20px;
            }
            .site-footer .footer-bottom {
                flex-direction: column;
                gap: 6px;
                text-align: center;
            }
            .site-footer .footer-bottom .separator {
                display: none;
            }
        }

        @media (max-width: 520px) {
            :root {
                --section-gap: 36px;
                --card-padding: 16px;
                --grid-gap: 12px;
            }
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .section-title {
                font-size: 21px;
            }
            .section-desc {
                font-size: 14px;
            }
            .page-header h1 {
                font-size: 24px;
            }
            .page-header .page-subtitle {
                font-size: 14px;
            }
            .process-flow {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .metrics-strip {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
                padding: 18px 14px;
            }
            .metrics-strip .metric-block .metric-number {
                font-size: 22px;
            }
            .metrics-strip .metric-block .metric-label {
                font-size: 12px;
            }
            .case-card .card-body {
                padding: 16px;
            }
            .case-card .card-title {
                font-size: 16px;
            }
            .testimonial-card {
                padding: 16px;
            }
            .testimonial-card .quote-text {
                font-size: 14px;
            }
            .cta-banner .cta-title {
                font-size: 20px;
            }
            .btn-cta-white {
                width: 100%;
                justify-content: center;
                padding: 12px 20px;
                font-size: 14px;
            }
            .footer-desc {
                max-width: 100%;
            }
        }

/* roulang page: category7 */
:root {
            --color-primary: #2F6DB3;
            --color-primary-light: #EBF3FA;
            --color-primary-deep: #1F4E7A;
            --color-accent: #1FA37A;
            --color-cta: #E98120;
            --color-cta-hover: #c96e15;
            --color-bg: #F7F9FC;
            --color-card: #FFFFFF;
            --color-text: #1F2933;
            --color-text-secondary: #5B6770;
            --color-border: #E1E7EC;
            --color-footer-bg: #172636;
            --color-footer-text: #B8C2CC;
            --color-img-placeholder: #EEF2F7;
            --radius-card: 12px;
            --radius-btn: 8px;
            --radius-badge: 999px;
            --shadow-card: 0 2px 8px rgba(31, 42, 53, .06);
            --shadow-card-hover: 0 8px 24px rgba(47, 109, 179, .12);
            --shadow-nav: 0 2px 12px rgba(31, 42, 53, .08);
            --transition-base: all .25s ease;
            --font-family-base: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            --section-gap: 72px;
            --card-padding: 28px;
            --grid-gap: 24px;
        }

        @media (max-width: 992px) {
            :root {
                --section-gap: 56px;
                --card-padding: 22px;
                --grid-gap: 18px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --section-gap: 44px;
                --card-padding: 20px;
                --grid-gap: 16px;
            }
        }

        @media (max-width: 576px) {
            :root {
                --section-gap: 36px;
                --card-padding: 16px;
                --grid-gap: 12px;
            }
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-family-base);
            font-size: 15px;
            line-height: 1.75;
            color: var(--color-text);
            background-color: var(--color-bg);
            margin: 0;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        a {
            text-decoration: none;
            color: var(--color-primary);
            transition: var(--transition-base);
        }

        a:hover {
            color: var(--color-primary-deep);
        }

        a:focus-visible {
            outline: 2px solid var(--color-cta);
            outline-offset: 2px;
            border-radius: 2px;
        }

        img {
            max-width: 100%;
            height: auto;
            object-fit: cover;
        }

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }

        button:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--color-cta);
            outline-offset: 1px;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        section {
            padding: var(--section-gap) 0;
        }

        section.section-alt {
            background-color: #FFFFFF;
        }

        section.section-tint {
            background-color: var(--color-primary-light);
        }

        .section-label {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--color-primary);
            background: var(--color-primary-light);
            padding: 6px 14px;
            border-radius: var(--radius-badge);
            margin-bottom: 12px;
            letter-spacing: .02em;
        }

        .section-title {
            margin-bottom: 12px;
            font-weight: 700;
            font-size: 30px;
            line-height: 1.35;
            color: var(--color-text);
        }

        .section-desc {
            font-size: 16px;
            color: var(--color-text-secondary);
            max-width: 720px;
            margin-bottom: 32px;
            line-height: 1.8;
        }

        .section-desc.center {
            margin-left: auto;
            margin-right: auto;
            text-align: center;
        }

        /* ============ NAV ============ */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1030;
            background: linear-gradient(135deg, var(--color-primary-deep) 0%, var(--color-primary) 65%, #4A8AC9 100%);
            box-shadow: var(--shadow-nav);
        }

        .site-header .navbar {
            padding: 0;
        }

        .site-header .navbar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            color: #FFFFFF;
            font-weight: 700;
            font-size: 22px;
            letter-spacing: .02em;
            padding: 14px 0;
        }

        .site-header .navbar-brand:hover {
            color: #FFFFFF;
            opacity: .9;
        }

        .brand-icon {
            width: 36px;
            height: 36px;
            border-radius: 9px;
            background: rgba(255, 255, 255, .15);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: #fff;
            flex-shrink: 0;
        }

        .site-header .navbar-toggler {
            border: none;
            color: #fff;
            font-size: 24px;
            padding: 10px 0;
        }

        .site-header .navbar-toggler:focus {
            box-shadow: none;
            outline: 2px solid rgba(255, 255, 255, .5);
            outline-offset: 2px;
            border-radius: 6px;
        }

        .site-header .navbar-nav {
            gap: 4px;
        }

        .site-header .navbar-nav .nav-link {
            color: rgba(255, 255, 255, .85);
            font-size: 14px;
            font-weight: 500;
            padding: 18px 14px !important;
            border-radius: 6px;
            transition: var(--transition-base);
            letter-spacing: .01em;
            position: relative;
            white-space: nowrap;
        }

        .site-header .navbar-nav .nav-link:hover,
        .site-header .navbar-nav .nav-link.active {
            color: #FFFFFF;
            background: rgba(255, 255, 255, .12);
        }

        .site-header .navbar-nav .nav-link.active::after {
            content: "";
            position: absolute;
            left: 14px;
            right: 14px;
            bottom: 8px;
            height: 2px;
            background: #fff;
            border-radius: 2px;
        }

        .nav-cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--color-cta);
            color: #FFFFFF;
            font-weight: 600;
            font-size: 14px;
            padding: 10px 20px;
            border-radius: var(--radius-btn);
            transition: var(--transition-base);
            white-space: nowrap;
        }

        .nav-cta-btn:hover {
            background: var(--color-cta-hover);
            color: #FFFFFF;
            transform: translateY(-1px);
            box-shadow: 0 4px 12px rgba(233, 129, 32, .35);
        }

        /* ============ HELP HERO ============ */
        .help-hero {
            background: linear-gradient(180deg, #FFFFFF 0%, var(--color-bg) 100%);
            padding: 64px 0 48px;
            border-bottom: 1px solid var(--color-border);
        }

        .help-hero .hero-title {
            font-size: 38px;
            font-weight: 700;
            line-height: 1.3;
            color: var(--color-text);
            margin-bottom: 16px;
        }

        .help-hero .hero-desc {
            font-size: 17px;
            color: var(--color-text-secondary);
            max-width: 680px;
            line-height: 1.8;
            margin-bottom: 28px;
        }

        .help-search-box {
            max-width: 620px;
            margin-bottom: 32px;
        }

        .help-search-box .input-group {
            border-radius: var(--radius-btn);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--color-border);
            transition: var(--transition-base);
        }

        .help-search-box .input-group:focus-within {
            border-color: var(--color-primary);
            box-shadow: 0 4px 16px rgba(47, 109, 179, .15);
        }

        .help-search-box .form-control {
            border: none;
            padding: 14px 18px;
            font-size: 15px;
            background: #FFFFFF;
            color: var(--color-text);
        }

        .help-search-box .form-control::placeholder {
            color: #9AA7B4;
        }

        .help-search-box .form-control:focus {
            box-shadow: none;
            outline: none;
        }

        .help-search-box .search-btn {
            background: var(--color-primary);
            color: #fff;
            border: none;
            padding: 0 24px;
            font-weight: 600;
            transition: var(--transition-base);
        }

        .help-search-box .search-btn:hover {
            background: var(--color-primary-deep);
            color: #fff;
        }

        .help-hero-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 28px;
        }

        .help-hero-stat {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .help-hero-stat .stat-icon {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: var(--color-primary-light);
            color: var(--color-primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            flex-shrink: 0;
        }

        .help-hero-stat .stat-text {
            font-size: 14px;
            color: var(--color-text-secondary);
        }

        .help-hero-stat .stat-text strong {
            display: block;
            font-size: 20px;
            color: var(--color-text);
            font-weight: 700;
            line-height: 1.3;
        }

        .help-hero-image {
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card-hover);
            min-height: 260px;
            background: var(--color-img-placeholder);
        }

        .help-hero-image img {
            width: 100%;
            height: 100%;
            min-height: 260px;
            object-fit: cover;
            display: block;
        }

        /* ============ QUICK START ============ */
        .quick-start-card {
            background: var(--color-card);
            border-radius: var(--radius-card);
            padding: 26px;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--color-border);
            transition: var(--transition-base);
            height: 100%;
            position: relative;
            overflow: hidden;
        }

        .quick-start-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
            border-color: rgba(47, 109, 179, .35);
        }

        .quick-start-card .step-number {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: var(--color-primary);
            color: #fff;
            font-weight: 700;
            font-size: 18px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 16px;
        }

        .quick-start-card .step-title {
            font-size: 18px;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 10px;
        }

        .quick-start-card .step-text {
            font-size: 14px;
            color: var(--color-text-secondary);
            line-height: 1.75;
            margin-bottom: 0;
        }

        /* ============ HELP CATEGORY ============ */
        .help-category-card {
            background: var(--color-card);
            border-radius: var(--radius-card);
            padding: 22px 20px;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--color-border);
            text-align: center;
            transition: var(--transition-base);
            height: 100%;
            display: block;
            color: var(--color-text);
        }

        .help-category-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
            border-color: rgba(47, 109, 179, .35);
            color: var(--color-text);
        }

        .help-category-card .cat-icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            background: var(--color-primary-light);
            color: var(--color-primary);
            font-size: 22px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 14px;
            transition: var(--transition-base);
        }

        .help-category-card:hover .cat-icon {
            background: var(--color-primary);
            color: #fff;
        }

        .help-category-card .cat-name {
            font-size: 15px;
            font-weight: 600;
            color: var(--color-text);
            margin-bottom: 4px;
        }

        .help-category-card .cat-count {
            font-size: 13px;
            color: var(--color-text-secondary);
        }

        /* ============ FAQ ACCORDION ============ */
        .faq-accordion .accordion-item {
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card) !important;
            margin-bottom: 12px;
            background: var(--color-card);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            transition: var(--transition-base);
        }

        .faq-accordion .accordion-item:hover {
            border-color: rgba(47, 109, 179, .3);
        }

        .faq-accordion .accordion-button {
            background: var(--color-card);
            color: var(--color-text);
            font-weight: 600;
            font-size: 16px;
            padding: 20px 24px;
            border: none;
            box-shadow: none;
            border-radius: var(--radius-card) !important;
            transition: var(--transition-base);
        }

        .faq-accordion .accordion-button:not(.collapsed) {
            background: var(--color-primary-light);
            color: var(--color-primary-deep);
            box-shadow: none;
            border-bottom: 1px solid var(--color-border);
            border-radius: var(--radius-card) var(--radius-card) 0 0 !important;
        }

        .faq-accordion .accordion-button:focus {
            box-shadow: none;
            outline: 2px solid var(--color-cta);
            outline-offset: -2px;
        }

        .faq-accordion .accordion-button::after {
            content: "\f078";
            font-family: "Font Awesome 6 Free";
            font-weight: 900;
            background-image: none;
            width: auto;
            height: auto;
            font-size: 14px;
            color: var(--color-primary);
            transition: var(--transition-base);
        }

        .faq-accordion .accordion-button:not(.collapsed)::after {
            content: "\f077";
            color: var(--color-primary-deep);
        }

        .faq-accordion .accordion-body {
            padding: 20px 24px;
            font-size: 15px;
            line-height: 1.8;
            color: var(--color-text-secondary);
            background: var(--color-card);
        }

        /* ============ POLICY CARD ============ */
        .policy-card {
            background: var(--color-card);
            border-radius: var(--radius-card);
            padding: 24px;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--color-border);
            height: 100%;
            transition: var(--transition-base);
        }

        .policy-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }

        .policy-card .policy-icon {
            width: 44px;
            height: 44px;
            border-radius: 10px;
            background: var(--color-primary-light);
            color: var(--color-primary);
            font-size: 18px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 14px;
        }

        .policy-card .policy-title {
            font-size: 17px;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 10px;
        }

        .policy-card .policy-text {
            font-size: 14px;
            color: var(--color-text-secondary);
            line-height: 1.75;
            margin-bottom: 0;
        }

        /* ============ CONTACT SUPPORT ============ */
        .contact-support-card {
            background: linear-gradient(135deg, var(--color-primary-deep) 0%, var(--color-primary) 70%, #4A8AC9 100%);
            border-radius: var(--radius-card);
            padding: 40px;
            color: #FFFFFF;
            box-shadow: 0 8px 28px rgba(47, 109, 179, .25);
        }

        .contact-support-card .contact-title {
            font-size: 26px;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 12px;
        }

        .contact-support-card .contact-desc {
            font-size: 15px;
            color: rgba(255, 255, 255, .85);
            margin-bottom: 24px;
            line-height: 1.75;
        }

        .contact-methods {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            margin-bottom: 24px;
        }

        .contact-method {
            display: flex;
            align-items: center;
            gap: 12px;
            background: rgba(255, 255, 255, .12);
            border-radius: var(--radius-btn);
            padding: 12px 18px;
            transition: var(--transition-base);
        }

        .contact-method:hover {
            background: rgba(255, 255, 255, .2);
        }

        .contact-method .cm-icon {
            width: 36px;
            height: 36px;
            border-radius: 8px;
            background: rgba(255, 255, 255, .2);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            color: #fff;
            flex-shrink: 0;
        }

        .contact-method .cm-text {
            font-size: 14px;
            color: rgba(255, 255, 255, .9);
            line-height: 1.4;
        }

        .contact-method .cm-text strong {
            display: block;
            font-size: 15px;
            color: #fff;
            font-weight: 600;
        }

        /* ============ FEEDBACK FORM ============ */
        .feedback-card {
            background: var(--color-card);
            border-radius: var(--radius-card);
            padding: 32px;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--color-border);
        }

        .feedback-card .form-label {
            font-weight: 600;
            font-size: 14px;
            color: var(--color-text);
            margin-bottom: 6px;
        }

        .feedback-card .form-control,
        .feedback-card .form-select {
            border: 1px solid var(--color-border);
            border-radius: var(--radius-btn);
            padding: 11px 16px;
            font-size: 14px;
            color: var(--color-text);
            background: #FFFFFF;
            transition: var(--transition-base);
        }

        .feedback-card .form-control:focus,
        .feedback-card .form-select:focus {
            border-color: var(--color-primary);
            box-shadow: 0 0 0 3px rgba(47, 109, 179, .12);
        }

        .feedback-card .form-control::placeholder {
            color: #9AA7B4;
        }

        .feedback-card .btn-submit {
            background: var(--color-cta);
            color: #fff;
            border: none;
            padding: 12px 28px;
            font-weight: 600;
            font-size: 15px;
            border-radius: var(--radius-btn);
            transition: var(--transition-base);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .feedback-card .btn-submit:hover {
            background: var(--color-cta-hover);
            transform: translateY(-1px);
            box-shadow: 0 4px 14px rgba(233, 129, 32, .35);
        }

        /* ============ RESOURCE LIST ============ */
        .resource-list-item {
            background: var(--color-card);
            border-radius: var(--radius-card);
            padding: 18px 22px;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--color-border);
            display: flex;
            align-items: center;
            gap: 16px;
            margin-bottom: 12px;
            transition: var(--transition-base);
            color: var(--color-text);
        }

        .resource-list-item:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-1px);
            border-color: rgba(47, 109, 179, .3);
            color: var(--color-text);
        }

        .resource-list-item .res-icon {
            width: 44px;
            height: 44px;
            border-radius: 10px;
            background: var(--color-primary-light);
            color: var(--color-primary);
            font-size: 18px;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }

        .resource-list-item .res-info {
            flex: 1;
        }

        .resource-list-item .res-title {
            font-size: 15px;
            font-weight: 600;
            color: var(--color-text);
            margin-bottom: 2px;
        }

        .resource-list-item .res-meta {
            font-size: 13px;
            color: var(--color-text-secondary);
        }

        .resource-list-item .res-action {
            color: var(--color-primary);
            font-size: 14px;
            font-weight: 600;
            white-space: nowrap;
            transition: var(--transition-base);
        }

        .resource-list-item .res-action:hover {
            color: var(--color-primary-deep);
        }

        /* ============ FOOTER ============ */
        .site-footer {
            background: var(--color-footer-bg);
            color: var(--color-footer-text);
            padding: 56px 0 24px;
        }

        .site-footer .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            color: #FFFFFF;
            font-weight: 700;
            font-size: 20px;
            margin-bottom: 14px;
        }

        .site-footer .footer-brand .brand-icon {
            background: rgba(255, 255, 255, .12);
            color: #fff;
        }

        .site-footer .footer-desc {
            font-size: 14px;
            color: var(--color-footer-text);
            line-height: 1.8;
            max-width: 280px;
            margin-bottom: 0;
        }

        .site-footer .footer-title {
            font-size: 15px;
            font-weight: 600;
            color: #FFFFFF;
            margin-bottom: 16px;
        }

        .site-footer .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .site-footer .footer-links li {
            margin-bottom: 8px;
        }

        .site-footer .footer-links a {
            font-size: 14px;
            color: var(--color-footer-text);
            transition: var(--transition-base);
        }

        .site-footer .footer-links a:hover {
            color: #FFFFFF;
        }

        .site-footer .footer-bottom {
            margin-top: 40px;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, .08);
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--color-footer-text);
        }

        .site-footer .footer-bottom a {
            color: var(--color-footer-text);
        }

        .site-footer .footer-bottom a:hover {
            color: #FFFFFF;
        }

        .site-footer .footer-bottom .separator {
            color: rgba(255, 255, 255, .25);
        }

        /* ============ BUTTONS ============ */
        .btn-outline-primary-custom {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: transparent;
            color: var(--color-primary);
            border: 1px solid var(--color-primary);
            padding: 10px 20px;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 14px;
            transition: var(--transition-base);
        }

        .btn-outline-primary-custom:hover {
            background: var(--color-primary-light);
            color: var(--color-primary-deep);
            border-color: var(--color-primary);
        }

        .btn-cta-custom {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--color-cta);
            color: #fff;
            border: none;
            padding: 12px 26px;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 15px;
            transition: var(--transition-base);
        }

        .btn-cta-custom:hover {
            background: var(--color-cta-hover);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 4px 14px rgba(233, 129, 32, .35);
        }

        /* ============ RESPONSIVE ============ */
        @media (max-width: 992px) {
            .site-header .navbar-collapse {
                background: linear-gradient(135deg, var(--color-primary-deep) 0%, var(--color-primary) 100%);
                border-radius: 0 0 12px 12px;
                padding: 12px 16px;
                margin-top: 4px;
            }
            .site-header .navbar-nav .nav-link {
                padding: 12px 14px !important;
            }
            .site-header .navbar-nav .nav-link.active::after {
                display: none;
            }
            .nav-cta-btn {
                margin: 8px 0;
                justify-content: center;
            }
            .help-hero .hero-title {
                font-size: 32px;
            }
        }

        @media (max-width: 768px) {
            .help-hero {
                padding: 40px 0 32px;
            }
            .help-hero .hero-title {
                font-size: 27px;
            }
            .help-hero .hero-desc {
                font-size: 15px;
            }
            .section-title {
                font-size: 24px;
            }
            .contact-support-card {
                padding: 28px 22px;
            }
            .contact-support-card .contact-title {
                font-size: 22px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 4px;
            }
        }

        @media (max-width: 576px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .help-hero .hero-title {
                font-size: 23px;
            }
            .help-hero-stats {
                gap: 16px;
            }
            .help-hero-stat .stat-text strong {
                font-size: 17px;
            }
            .help-hero-image,
            .help-hero-image img {
                min-height: 200px;
            }
            .feedback-card {
                padding: 20px 16px;
            }
            .contact-methods {
                flex-direction: column;
            }
            .resource-list-item {
                flex-wrap: wrap;
                padding: 16px;
            }
            .resource-list-item .res-action {
                width: 100%;
                text-align: right;
                padding-top: 8px;
                border-top: 1px solid var(--color-border);
            }
        }

/* roulang: framework shim */
/* 覆盖 Bootstrap 等对 a/btn 的全局默认，避免导航出现下划线/蓝链 */
.site-header a,.site-header a:hover,.navbar a,.navbar a:hover,.nav-links a,.nav-links a:hover,header nav a,header nav a:hover{text-decoration:none}
.site-header .btn,.navbar .btn,.nav-cta{text-decoration:none}