/* roulang page: index */
:root {
            --primary: #2563EB;
            --primary-dark: #1D4FBF;
            --primary-light: #EAF1FE;
            --secondary: #0FA3A3;
            --success: #10B981;
            --warning: #F59E0B;
            --danger: #EF4444;
            --bg-page: #F7F9FC;
            --bg-card: #FFFFFF;
            --text-main: #1E293B;
            --text-sub: #475569;
            --text-muted: #94A3B8;
            --border-color: #E2E8F0;
            --radius-lg: 16px;
            --radius-md: 12px;
            --radius-sm: 8px;
            --radius-pill: 999px;
            --shadow-card: 0 1px 2px rgba(16, 24, 40, .04), 0 4px 16px rgba(16, 24, 40, .06);
            --shadow-hover: 0 4px 8px rgba(16, 24, 40, .06), 0 12px 32px rgba(16, 24, 40, .10);
            --shadow-nav: 0 1px 4px rgba(16, 24, 40, .04), 0 6px 20px rgba(16, 24, 40, .04);
            --font-sans: "PingFang SC", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", system-ui, -apple-system, "Segoe UI", sans-serif;
            --bs-primary: #2563EB;
            --bs-secondary: #0FA3A3;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-sans);
            background: var(--bg-page);
            color: var(--text-main);
            line-height: 1.75;
            margin: 0;
            -webkit-font-smoothing: antialiased;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color .2s ease;
        }

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

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

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

        .section-heading {
            text-align: center;
            margin-bottom: 48px;
        }

        .section-heading .section-tag {
            display: inline-block;
            padding: 4px 16px;
            border-radius: var(--radius-pill);
            background: var(--primary-light);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            letter-spacing: .05em;
            margin-bottom: 14px;
        }

        .section-heading .section-title {
            font-size: 30px;
            font-weight: 700;
            letter-spacing: -.5px;
            color: var(--text-main);
            margin: 0 0 12px;
        }

        .section-heading .section-desc {
            font-size: 16px;
            color: var(--text-sub);
            max-width: 720px;
            margin: 0 auto;
        }

        .btn {
            border-radius: var(--radius-pill);
            font-weight: 600;
            transition: all .2s ease;
        }

        .btn:focus,
        .btn:focus-visible {
            outline: 3px solid rgba(37, 99, 235, .3);
            box-shadow: none;
        }

        .btn-primary {
            --bs-btn-bg: var(--primary);
            --bs-btn-border-color: var(--primary);
            --bs-btn-hover-bg: var(--primary-dark);
            --bs-btn-hover-border-color: var(--primary-dark);
            --bs-btn-active-bg: var(--primary-dark);
            --bs-btn-active-border-color: var(--primary-dark);
            --bs-btn-focus-shadow-rgb: 37, 99, 235;
            padding: 10px 28px;
        }

        .btn-outline-primary {
            --bs-btn-color: var(--primary);
            --bs-btn-border-color: var(--primary);
            --bs-btn-hover-bg: var(--primary-light);
            --bs-btn-hover-border-color: var(--primary);
            --bs-btn-hover-color: var(--primary);
            --bs-btn-active-bg: var(--primary-light);
            --bs-btn-active-border-color: var(--primary);
            --bs-btn-active-color: var(--primary);
            padding: 10px 28px;
        }

        .btn-lg {
            padding: 14px 36px;
            font-size: 16px;
        }

        .btn-secondary {
            --bs-btn-bg: var(--secondary);
            --bs-btn-border-color: var(--secondary);
            --bs-btn-hover-bg: #0B8B8B;
            --bs-btn-hover-border-color: #0B8B8B;
            --bs-btn-active-bg: #0B8B8B;
            --bs-btn-focus-shadow-rgb: 15, 163, 163;
            padding: 10px 28px;
        }

        /* ---------- Header ---------- */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1030;
            background: #fff;
            box-shadow: var(--shadow-nav);
        }

        .header-top {
            height: 64px;
            background: #fff;
            border-bottom: 1px solid rgba(226, 232, 240, .6);
        }

        .header-top-inner {
            display: flex;
            align-items: center;
            gap: 20px;
            height: 64px;
        }

        .brand-logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .brand-logo-icon {
            width: 34px;
            height: 34px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 12px rgba(37, 99, 235, .25);
        }

        .brand-logo-icon svg {
            width: 20px;
            height: 20px;
            fill: #fff;
        }

        .brand-logo-text {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-main);
            letter-spacing: -.2px;
        }

        .header-search {
            max-width: 420px;
            flex: 1;
            position: relative;
        }

        .header-search .form-control {
            background: #F1F5F9;
            border: 1px solid transparent;
            border-radius: var(--radius-pill);
            height: 42px;
            padding-left: 42px;
            font-size: 14px;
            transition: all .2s;
        }

        .header-search .form-control:focus {
            background: #fff;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(37, 99, 235, .12);
        }

        .header-search .search-icon {
            position: absolute;
            left: 16px;
            top: 50%;
            transform: translateY(-50%);
            width: 18px;
            height: 18px;
            color: var(--text-muted);
            pointer-events: none;
        }

        .header-cta-btn {
            white-space: nowrap;
            padding: 8px 22px;
            font-size: 14px;
        }

        .navbar-burger {
            display: inline-flex;
            flex-direction: column;
            justify-content: center;
            gap: 5px;
            width: 44px;
            height: 44px;
            border: 1px solid var(--border-color);
            border-radius: 10px;
            background: #fff;
            padding: 8px;
            cursor: pointer;
            transition: border-color .2s, background .2s;
        }

        .navbar-burger:hover {
            border-color: var(--primary);
            background: var(--primary-light);
        }

        .navbar-burger span {
            display: block;
            height: 2px;
            border-radius: 2px;
            background: var(--text-main);
            transition: all .2s;
        }

        .header-nav {
            background: #fff;
            border-top: 1px solid rgba(226, 232, 240, .4);
        }

        .nav-tabs-scroll {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 8px 0;
            overflow-x: auto;
            scrollbar-width: none;
            -ms-overflow-style: none;
        }

        .nav-tabs-scroll::-webkit-scrollbar {
            display: none;
        }

        .nav-tab {
            display: inline-flex;
            align-items: center;
            white-space: nowrap;
            padding: 7px 18px;
            border-radius: var(--radius-pill);
            font-size: 14px;
            font-weight: 500;
            color: var(--text-sub);
            background: #F8FAFC;
            transition: all .2s ease;
        }

        .nav-tab:hover {
            background: var(--primary-light);
            color: var(--primary);
        }

        .nav-tab:focus-visible {
            outline: 3px solid rgba(37, 99, 235, .3);
        }

        .nav-tab.active {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 12px rgba(37, 99, 235, .25);
        }

        .mobile-nav-panel {
            background: #fff;
            border-top: 1px solid var(--border-color);
            padding: 12px 0 20px;
        }

        .mobile-nav-panel .mobile-nav-link {
            display: block;
            padding: 12px 8px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-sub);
            border-bottom: 1px solid rgba(226, 232, 240, .4);
        }

        .mobile-nav-panel .mobile-nav-link:last-child {
            border-bottom: none;
        }

        .mobile-nav-panel .mobile-nav-link:hover {
            color: var(--primary);
            background: var(--primary-light);
            border-radius: var(--radius-sm);
        }

        /* ---------- Hero ---------- */
        .hero-section {
            padding: 90px 0 100px;
            background: linear-gradient(180deg, #F0F5FF 0%, var(--bg-page) 100%);
            position: relative;
            overflow: hidden;
        }

        .hero-section::before {
            content: "";
            position: absolute;
            top: 0;
            right: 0;
            width: 60%;
            height: 100%;
            background-image: radial-gradient(circle, rgba(37, 99, 235, .06) 1px, transparent 1px);
            background-size: 24px 24px;
            pointer-events: none;
        }

        .hero-badge {
            display: inline-block;
            padding: 6px 16px;
            border-radius: var(--radius-pill);
            background: rgba(37, 99, 235, .09);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            letter-spacing: .04em;
            margin-bottom: 20px;
        }

        .hero-title {
            font-size: 38px;
            line-height: 1.25;
            font-weight: 700;
            letter-spacing: -0.5px;
            margin-bottom: 18px;
            color: var(--text-main);
        }

        .hero-title .brand-highlight {
            color: var(--primary);
        }

        .hero-subtitle {
            font-size: 18px;
            line-height: 1.7;
            color: var(--text-sub);
            margin-bottom: 32px;
            max-width: 520px;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-bottom: 32px;
        }

        .hero-points {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            font-size: 14px;
            color: var(--text-sub);
        }

        .hero-points span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .hero-points .check-icon {
            width: 18px;
            height: 18px;
            border-radius: 50%;
            background: rgba(16, 185, 129, .12);
            color: var(--success);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 11px;
            font-weight: 700;
        }

        .hero-visual {
            position: relative;
            min-height: 420px;
        }

        .hero-visual-main {
            position: absolute;
            top: 20px;
            left: 20px;
            right: 0;
            height: 380px;
            border-radius: var(--radius-lg);
            background: linear-gradient(135deg, rgba(37, 99, 235, .15), rgba(15, 163, 163, .10)), url('/assets/images/backpic/back-1.png') center/cover;
            border: 1px solid rgba(255, 255, 255, .8);
            box-shadow: var(--shadow-hover);
            overflow: hidden;
        }

        .hero-visual-main::after {
            content: "";
            position: absolute;
            inset: 0;
            background: rgba(37, 99, 235, .06);
        }

        .visual-label {
            position: absolute;
            top: 24px;
            left: 28px;
            z-index: 2;
            background: rgba(255, 255, 255, .9);
            border-radius: var(--radius-pill);
            padding: 6px 16px;
            font-size: 13px;
            font-weight: 600;
            color: var(--text-sub);
            display: inline-flex;
            align-items: center;
            gap: 8px;
            box-shadow: 0 2px 10px rgba(16, 24, 40, .06);
        }

        .visual-label::before {
            content: "";
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--success);
            box-shadow: 0 0 0 3px rgba(16, 185, 129, .2);
        }

        .visual-chart {
            position: absolute;
            bottom: 40px;
            left: 28px;
            right: 28px;
            z-index: 2;
            height: 180px;
            display: flex;
            align-items: flex-end;
            gap: 14px;
            padding: 16px;
            background: rgba(255, 255, 255, .55);
            border-radius: var(--radius-md);
            backdrop-filter: none;
        }

        .visual-chart .chart-bar {
            flex: 1;
            border-radius: 6px 6px 0 0;
            background: linear-gradient(to top, rgba(37, 99, 235, .3), rgba(37, 99, 235, .75));
            min-height: 20px;
        }

        .visual-chart .chart-bar:nth-child(2) {
            background: linear-gradient(to top, rgba(15, 163, 163, .3), rgba(15, 163, 163, .8));
        }

        .hero-float-card {
            position: absolute;
            background: #fff;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-hover);
            padding: 16px 18px;
            z-index: 5;
        }

        .hero-float-card.float-a {
            top: 0;
            right: 10px;
            min-width: 150px;
            border-left: 4px solid var(--secondary);
        }

        .float-label {
            font-size: 12px;
            color: var(--text-muted);
            margin-bottom: 2px;
        }

        .float-value {
            font-size: 26px;
            font-weight: 700;
            font-feature-settings: "tnum";
            color: var(--text-main);
        }

        .float-value span {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-muted);
            margin-left: 2px;
        }

        .float-delta {
            font-size: 12px;
            font-weight: 600;
            margin-top: 2px;
        }

        .float-delta.up {
            color: var(--success);
        }

        .hero-float-card.float-b {
            bottom: 0;
            left: 0;
            width: 168px;
            padding: 6px;
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid rgba(226, 232, 240, .7);
        }

        .hero-float-card.float-b img {
            width: 100%;
            height: 100px;
            object-fit: cover;
            border-radius: 8px;
        }

        .hero-float-card.float-b .float-b-caption {
            position: absolute;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(15, 23, 42, .55);
            color: #fff;
            font-size: 12px;
            text-align: center;
            padding: 4px;
            border-radius: 0 0 10px 10px;
        }

        /* ---------- Metrics ---------- */
        .metrics-section {
            padding: 90px 0;
            background: var(--bg-page);
        }

        .metric-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 26px 24px 22px;
            box-shadow: var(--shadow-card);
            border: 1px solid rgba(226, 232, 240, .5);
            transition: all .25s ease;
            position: relative;
            overflow: hidden;
        }

        .metric-card::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: var(--primary);
            opacity: 0;
            transition: opacity .25s;
        }

        .metric-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(37, 99, 235, .25);
        }

        .metric-card:hover::before {
            opacity: 1;
        }

        .metric-card.accent::before {
            background: var(--secondary);
        }

        .metric-value {
            font-size: 44px;
            font-weight: 700;
            font-feature-settings: "tnum";
            line-height: 1.1;
            color: var(--text-main);
            letter-spacing: -.5px;
            margin-bottom: 6px;
        }

        .metric-card.accent .metric-value {
            color: var(--secondary);
        }

        .metric-name {
            font-size: 15px;
            color: var(--text-sub);
            margin-bottom: 10px;
        }

        .metric-trend {
            font-size: 13px;
            font-weight: 500;
            margin-bottom: 14px;
        }

        .metric-trend.up {
            color: var(--success);
        }

        .metric-trend.down {
            color: var(--danger);
        }

        .metric-track {
            height: 6px;
            border-radius: 4px;
            background: #F1F5F9;
            overflow: hidden;
        }

        .metric-track span {
            display: block;
            height: 100%;
            border-radius: 4px;
            background: linear-gradient(90deg, var(--primary), #60A5FA);
        }

        .metric-card.accent .metric-track span {
            background: linear-gradient(90deg, var(--secondary), #2DD4BF);
        }

        /* ---------- Service Matrix ---------- */
        .services-section {
            padding: 90px 0;
            background: #fff;
        }

        .service-card {
            background: #fff;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-color);
            padding: 32px 30px;
            display: flex;
            gap: 24px;
            box-shadow: var(--shadow-card);
            transition: all .25s ease;
            position: relative;
            overflow: hidden;
        }

        .service-card::before {
            content: "";
            position: absolute;
            left: 0;
            top: 0;
            bottom: 0;
            width: 4px;
            background: var(--primary);
            opacity: 0;
            transition: opacity .25s;
        }

        .service-card:hover {
            border-color: rgba(37, 99, 235, .3);
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
        }

        .service-card:hover::before {
            opacity: 1;
        }

        .service-card .service-icon {
            width: 56px;
            height: 56px;
            border-radius: var(--radius-md);
            background: var(--primary-light);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            transition: all .25s ease;
        }

        .service-card .service-icon svg {
            width: 26px;
            height: 26px;
            stroke: var(--primary);
            fill: none;
            stroke-width: 2;
            stroke-linecap: round;
            stroke-linejoin: round;
            transition: all .25s ease;
        }

        .service-card:hover .service-icon {
            background: linear-gradient(135deg, var(--primary), #4F86F7);
            box-shadow: 0 6px 16px rgba(37, 99, 235, .28);
        }

        .service-card:hover .service-icon svg {
            stroke: #fff;
        }

        .service-card .service-body {
            flex: 1;
        }

        .service-card .service-title {
            font-size: 19px;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text-main);
        }

        .service-card .service-desc {
            font-size: 15px;
            line-height: 1.7;
            color: var(--text-sub);
            margin-bottom: 12px;
        }

        .service-card .service-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: gap .2s;
        }

        .service-card .service-link:hover {
            gap: 8px;
        }

        .service-card .service-link .arrow {
            font-size: 16px;
            line-height: 1;
        }

        /* ---------- Comparison ---------- */
        .comparison-section {
            padding: 90px 0;
            background: var(--bg-page);
        }

        .comparison-grid {
            display: flex;
            gap: 32px;
            margin-bottom: 32px;
        }

        .comparison-col {
            flex: 1;
            border-radius: var(--radius-lg);
            padding: 28px 30px;
            box-shadow: var(--shadow-card);
            position: relative;
        }

        .comparison-col.traditional {
            background: #fff;
            border: 1px solid var(--border-color);
        }

        .comparison-col.hth {
            background: #fff;
            border: 1px solid rgba(37, 99, 235, .25);
            box-shadow: var(--shadow-hover);
        }

        .comparison-col .comp-title {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 20px;
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--text-main);
        }

        .comp-badge {
            display: inline-block;
            padding: 4px 14px;
            border-radius: var(--radius-pill);
            font-size: 13px;
            font-weight: 600;
        }

        .comp-badge.trad-badge {
            background: #F1F5F9;
            color: var(--text-muted);
        }

        .comp-badge.hth-badge {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 3px 8px rgba(37, 99, 235, .25);
        }

        .comparison-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .comparison-col ul li {
            padding: 10px 0;
            font-size: 15px;
            color: var(--text-sub);
            display: flex;
            gap: 10px;
            align-items: flex-start;
            border-bottom: 1px dashed rgba(226, 232, 240, .7);
        }

        .comparison-col ul li:last-child {
            border-bottom: none;
        }

        .comp-icon {
            width: 20px;
            height: 20px;
            border-radius: 50%;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 12px;
            font-weight: 700;
            flex-shrink: 0;
            margin-top: 3px;
        }

        .comp-icon.x {
            background: rgba(239, 68, 68, .1);
            color: var(--danger);
        }

        .comp-icon.ok {
            background: rgba(16, 185, 129, .12);
            color: var(--success);
        }

        .comparison-col.hth ul li:first-child {
            background: rgba(16, 185, 129, .06);
            border-radius: 8px;
            padding-left: 10px;
            padding-right: 10px;
            border-bottom: 1px solid rgba(16, 185, 129, .1);
        }

        .comparison-summary {
            text-align: center;
            padding-top: 16px;
        }

        .comparison-summary .summary-text {
            font-size: 18px;
            color: var(--text-main);
            font-weight: 600;
            margin-bottom: 20px;
        }

        /* ---------- FAQ ---------- */
        .faq-section {
            padding: 90px 0;
            background: #fff;
        }

        .faq-wrap {
            max-width: 760px;
            margin: 0 auto;
        }

        .accordion-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            margin-bottom: 14px;
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: box-shadow .2s;
        }

        .accordion-item:focus-within {
            box-shadow: 0 0 0 3px rgba(37, 99, 235, .12);
        }

        .accordion-button {
            font-weight: 600;
            font-size: 16px;
            color: var(--text-main);
            background: #fff;
            box-shadow: none;
            padding: 18px 22px;
            border-radius: 12px;
            transition: color .2s;
        }

        .accordion-button:not(.collapsed) {
            color: var(--primary);
            background: #fff;
            box-shadow: inset 0 3px 0 var(--primary);
        }

        .accordion-button:focus {
            box-shadow: none;
            border: none;
            outline: none;
        }

        .accordion-button::after {
            background-image: none;
            content: "+";
            font-size: 22px;
            font-weight: 400;
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            transition: transform .25s ease;
        }

        .accordion-button:not(.collapsed)::after {
            transform: rotate(45deg);
        }

        .accordion-body {
            padding: 18px 22px 22px;
            font-size: 15px;
            color: var(--text-sub);
            line-height: 1.75;
            background: #F8FAFC;
            border-top: 1px solid var(--border-color);
        }

        /* ---------- News ---------- */
        .news-section {
            padding: 90px 0;
            background: var(--bg-page);
        }

        .news-list {
            max-width: 860px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .news-card {
            display: flex;
            align-items: center;
            background: #fff;
            border-radius: var(--radius-md);
            padding: 20px 22px;
            box-shadow: var(--shadow-card);
            border: 1px solid rgba(226, 232, 240, .5);
            gap: 20px;
            transition: all .25s ease;
            color: var(--text-main);
            position: relative;
            overflow: hidden;
        }

        .news-card:hover {
            transform: translateX(4px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(37, 99, 235, .2);
            color: var(--text-main);
        }

        .news-card::before {
            content: "";
            position: absolute;
            left: 0;
            top: 0;
            bottom: 0;
            width: 3px;
            background: var(--primary);
            opacity: 0;
            transition: opacity .25s;
        }

        .news-card:hover::before {
            opacity: 1;
        }

        .news-date {
            width: 64px;
            flex-shrink: 0;
            text-align: center;
            border-right: 1px solid var(--border-color);
            padding-right: 16px;
        }

        .news-day {
            font-size: 30px;
            font-weight: 700;
            color: var(--primary);
            font-feature-settings: "tnum";
            line-height: 1.1;
        }

        .news-month {
            font-size: 13px;
            color: var(--text-muted);
            margin-top: 2px;
        }

        .news-body {
            flex: 1;
            min-width: 0;
        }

        .news-meta {
            margin-bottom: 4px;
        }

        .news-category {
            display: inline-block;
            padding: 2px 10px;
            border-radius: 6px;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 12px;
            font-weight: 600;
        }

        .news-title {
            font-size: 17px;
            font-weight: 700;
            margin: 0 0 6px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
            color: var(--text-main);
            transition: color .2s;
        }

        .news-card:hover .news-title {
            color: var(--primary);
        }

        .news-excerpt {
            font-size: 14px;
            color: var(--text-sub);
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
            margin: 0;
        }

        .news-arrow {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: #F1F5F9;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: var(--text-sub);
            flex-shrink: 0;
            transition: all .25s ease;
        }

        .news-card:hover .news-arrow {
            background: var(--primary);
            color: #fff;
        }

        .news-empty {
            max-width: 860px;
            margin: 0 auto;
            border: 2px dashed var(--border-color);
            border-radius: var(--radius-lg);
            padding: 48px 20px;
            text-align: center;
            background: #fff;
        }

        .news-empty-icon {
            width: 64px;
            height: 64px;
            border-radius: 50%;
            background: var(--primary-light);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 28px;
            margin: 0 auto 14px;
        }

        .news-empty-title {
            font-size: 17px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 6px;
        }

        .news-empty-text {
            font-size: 14px;
            color: var(--text-muted);
        }

        /* ---------- Contact Form ---------- */
        .contact-section {
            padding: 90px 0;
            background: #fff;
        }

        .contact-info-panel {
            padding: 16px 0;
        }

        .contact-info-panel img {
            width: 100%;
            aspect-ratio: 16/7;
            object-fit: cover;
            border-radius: var(--radius-md);
            margin-bottom: 24px;
            display: block;
            box-shadow: var(--shadow-card);
        }

        .contact-info-panel .contact-title {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 12px;
        }

        .contact-points {
            list-style: none;
            padding: 0;
            margin: 0 0 20px;
        }

        .contact-points li {
            font-size: 14px;
            color: var(--text-sub);
            padding: 7px 0;
            display: flex;
            gap: 10px;
            align-items: center;
        }

        .contact-points li .point-icon {
            width: 22px;
            height: 22px;
            border-radius: 6px;
            background: rgba(15, 163, 163, .12);
            color: var(--secondary);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 12px;
            font-weight: 700;
        }

        .contact-hotline-label {
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 2px;
        }

        .contact-hotline {
            font-size: 32px;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: 1px;
            font-feature-settings: "tnum";
        }

        .contact-form-card {
            background: #fff;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-hover);
            border: 1px solid rgba(226, 232, 240, .5);
            padding: 36px 34px;
        }

        .contact-form-card .form-label {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-main);
        }

        .contact-form-card .form-label .required {
            color: var(--danger);
            margin-left: 2px;
        }

        .contact-form-card .form-control,
        .contact-form-card .form-select {
            border-radius: 10px;
            border: 1px solid #D1D9E6;
            background: #FBFCFE;
            padding: 10px 14px;
            font-size: 14px;
            height: 46px;
            transition: all .2s;
        }

        .contact-form-card textarea.form-control {
            height: auto;
            min-height: 120px;
            resize: vertical;
        }

        .contact-form-card .form-control:focus,
        .contact-form-card .form-select:focus {
            background: #fff;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(37, 99, 235, .12);
        }

        .contact-form-card .form-control.is-invalid,
        .contact-form-card .form-select.is-invalid {
            border-color: var(--danger);
        }

        .contact-form-card .invalid-feedback {
            font-size: 13px;
        }

        .submit-btn {
            width: 100%;
            height: 48px;
            border-radius: 10px;
            font-size: 16px;
            font-weight: 600;
            background: var(--primary);
            color: #fff;
            border: none;
            cursor: pointer;
            transition: all .2s ease;
        }

        .submit-btn:hover {
            background: var(--primary-dark);
            transform: translateY(-1px);
            box-shadow: 0 6px 16px rgba(37, 99, 235, .25);
        }

        .submit-btn.submitted {
            background: var(--success);
            transform: none;
            box-shadow: none;
        }

        /* ---------- Footer ---------- */
        .site-footer {
            background: #0F172A;
            color: #CBD5E1;
            padding-top: 64px;
        }

        .footer-info .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 16px;
        }

        .footer-logo .brand-logo-icon {
            width: 32px;
            height: 32px;
            border-radius: 9px;
        }

        .footer-logo .footer-logo-text {
            color: #fff;
            font-size: 20px;
            font-weight: 700;
        }

        .footer-info p {
            font-size: 13px;
            line-height: 1.8;
            color: #94A3B8;
            max-width: 300px;
        }

        .footer-social {
            display: flex;
            gap: 8px;
            margin-top: 16px;
        }

        .footer-social .social-btn {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(255, 255, 255, .08);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #CBD5E1;
            font-size: 14px;
            transition: all .2s;
            cursor: pointer;
        }

        .footer-social .social-btn:hover {
            background: var(--primary);
            color: #fff;
        }

        .footer-title {
            font-size: 14px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 18px;
        }

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

        .footer-links li {
            margin-bottom: 10px;
        }

        .footer-links a {
            font-size: 14px;
            color: #94A3B8;
            transition: color .2s;
        }

        .footer-links a:hover {
            color: #60A5FA;
        }

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

        .footer-contact-list li {
            font-size: 14px;
            color: #94A3B8;
            margin-bottom: 12px;
            display: flex;
            gap: 8px;
            align-items: flex-start;
        }

        .footer-contact-list li .contact-icon {
            color: var(--primary);
            flex-shrink: 0;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .08);
            margin-top: 48px;
            padding: 20px 0 24px;
        }

        .footer-bottom-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            flex-wrap: wrap;
        }

        .footer-bottom .copyright {
            font-size: 13px;
            color: #94A3B8;
        }

        .footer-bottom .legal-links {
            display: flex;
            gap: 18px;
            align-items: center;
        }

        .footer-bottom .legal-links a {
            font-size: 13px;
            color: #64748B;
        }

        .footer-bottom .legal-links a:hover {
            color: #60A5FA;
        }

        /* ---------- Responsive ---------- */
        @media (max-width: 991.98px) {
            .hero-section {
                padding: 60px 0 80px;
            }

            .hero-title {
                font-size: 32px;
            }

            .hero-visual {
                min-height: 340px;
            }

            .metric-value {
                font-size: 36px;
            }

            .comparison-grid {
                flex-direction: column;
            }

            .contact-form-card {
                margin-top: 28px;
            }

            .header-search {
                display: none;
            }
        }

        @media (max-width: 767.98px) {
            .metrics-section {
                padding: 60px 0;
            }

            .services-section {
                padding: 60px 0;
            }

            .comparison-section {
                padding: 60px 0;
            }

            .faq-section {
                padding: 60px 0;
            }

            .news-section {
                padding: 60px 0;
            }

            .contact-section {
                padding: 60px 0;
            }

            .site-footer {
                padding-top: 48px;
            }

            .metric-card {
                padding: 20px;
            }

            .metric-value {
                font-size: 34px;
            }

            .service-card {
                padding: 24px 20px;
                flex-direction: column;
                gap: 16px;
            }

            .service-card .service-icon {
                width: 48px;
                height: 48px;
            }

            .section-heading .section-title {
                font-size: 24px;
            }

            .comparison-col {
                padding: 22px 18px;
            }

            .news-card {
                padding: 16px;
                gap: 12px;
                align-items: flex-start;
            }

            .news-date {
                width: 48px;
                padding-right: 10px;
            }

            .news-day {
                font-size: 24px;
            }

            .news-excerpt {
                white-space: normal;
                display: -webkit-box;
                -webkit-line-clamp: 2;
                -webkit-box-orient: vertical;
            }

            .hero-title {
                font-size: 28px;
            }

            .hero-subtitle {
                font-size: 16px;
            }

            .hero-points {
                gap: 12px;
                font-size: 13px;
            }

            .contact-hotline {
                font-size: 26px;
            }

            .footer-bottom-inner {
                flex-direction: column;
                align-items: flex-start;
            }
        }

        @media (max-width: 575.98px) {
            .hero-actions .btn {
                width: 100%;
            }

            .btn-lg {
                width: 100%;
            }

            .metric-value {
                font-size: 30px;
            }

            .hero-visual {
                min-height: 280px;
            }

            .hero-visual-main {
                height: 320px;
            }

            .visual-chart {
                height: 140px;
            }

            .hero-float-card.float-b {
                width: 130px;
            }

            .hero-float-card.float-b img {
                height: 80px;
            }

            .contact-form-card {
                padding: 24px 20px;
            }

            .footer-bottom .legal-links {
                flex-wrap: wrap;
                gap: 10px;
            }
        }

/* roulang page: category1 */
:root {
            --primary: #2563EB;
            --primary-dark: #1D4FBF;
            --primary-light: #EAF1FE;
            --secondary: #0FA3A3;
            --success: #10B981;
            --warning: #F59E0B;
            --danger: #EF4444;
            --info: #3B82F6;
            --bg-page: #F7F9FC;
            --bg-card: #FFFFFF;
            --bg-block: #F1F5F9;
            --text-main: #1E293B;
            --text-secondary: #475569;
            --text-muted: #94A3B8;
            --border: #E2E8F0;
            --radius-lg: 16px;
            --radius-md: 12px;
            --radius-sm: 8px;
            --shadow-sm: 0 1px 2px rgba(16,24,40,0.04), 0 4px 16px rgba(16,24,40,0.06);
            --shadow-md: 0 4px 8px rgba(16,24,40,0.06), 0 12px 32px rgba(16,24,40,0.10);
            --shadow-nav: 0 1px 4px rgba(16,24,40,0.04), 0 6px 20px rgba(16,24,40,0.04);
            --font-sans: "PingFang SC", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", system-ui, sans-serif;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-sans);
            background: var(--bg-page);
            color: var(--text-main);
            line-height: 1.75;
            margin: 0;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color .2s ease;
        }
        a:hover {
            color: var(--primary-dark);
        }
        img {
            max-width: 100%;
            height: auto;
        }
        .container {
            max-width: 1200px;
            padding: 0 24px;
        }
        .section {
            padding: 100px 0;
        }
        .section-header {
            text-align: center;
            max-width: 680px;
            margin: 0 auto 56px;
        }
        .section-title {
            font-size: 32px;
            font-weight: 700;
            letter-spacing: -0.5px;
            color: var(--text-main);
            margin-bottom: 12px;
            position: relative;
            display: inline-block;
        }
        .section-title::before {
            content: '';
            display: inline-block;
            width: 6px;
            height: 28px;
            background: var(--primary);
            border-radius: 3px;
            margin-right: 12px;
            vertical-align: -3px;
        }
        .section-desc {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.7;
        }
        .btn {
            border-radius: 10px;
            font-weight: 600;
            padding: 12px 24px;
            transition: all .25s ease;
        }
        .btn-primary {
            background: var(--primary);
            border: 1px solid var(--primary);
            color: #fff;
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }
        .btn-outline-primary {
            border: 1px solid var(--primary);
            color: var(--primary);
            background: transparent;
        }
        .btn-outline-primary:hover {
            background: var(--primary-light);
            border-color: var(--primary);
            color: var(--primary-dark);
            transform: translateY(-2px);
        }
        .btn-secondary {
            background: var(--secondary);
            border: 1px solid var(--secondary);
            color: #fff;
        }
        .btn-secondary:hover {
            background: #0d8f8f;
            border-color: #0d8f8f;
            color: #fff;
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }
        .card {
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            transition: all .25s ease;
        }
        .card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .badge {
            border-radius: 6px;
            padding: 6px 12px;
            font-weight: 500;
            font-size: 13px;
        }
        .bg-primary-light {
            background: var(--primary-light);
        }
        .text-primary {
            color: var(--primary);
        }
        .text-secondary {
            color: var(--text-secondary);
        }
        .text-muted {
            color: var(--text-muted);
        }
        /* Header */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: #fff;
            box-shadow: var(--shadow-nav);
        }
        .header-top {
            background: #fff;
            border-bottom: 1px solid var(--border);
        }
        .header-top .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 64px;
            gap: 24px;
        }
        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            text-decoration: none;
            flex-shrink: 0;
        }
        .brand-logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: var(--primary);
            border-radius: 10px;
            flex-shrink: 0;
        }
        .brand-logo-icon svg {
            width: 24px;
            height: 24px;
            fill: none;
            stroke: #fff;
            stroke-width: 1.8;
        }
        .brand-logo-text {
            font-size: 22px;
            font-weight: 700;
            color: var(--text-main);
            letter-spacing: -0.3px;
        }
        .header-search {
            flex: 0 1 420px;
            position: relative;
        }
        .header-search input {
            width: 100%;
            height: 44px;
            border-radius: 999px;
            border: 1px solid transparent;
            background: var(--bg-page);
            padding: 0 48px 0 20px;
            font-size: 14px;
            color: var(--text-main);
            transition: all .25s ease;
            outline: none;
        }
        .header-search input:focus {
            background: #fff;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(37, 99, 235, .15);
        }
        .header-search .search-icon {
            position: absolute;
            right: 16px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--text-muted);
            font-size: 16px;
            pointer-events: none;
        }
        .header-cta .btn {
            padding: 10px 24px;
            font-size: 14px;
        }
        .header-nav {
            background: #fff;
        }
        .header-nav .container {
            padding-top: 8px;
            padding-bottom: 8px;
        }
        .nav-tabs-scroll {
            display: flex;
            gap: 8px;
            overflow-x: auto;
            scrollbar-width: none;
            -ms-overflow-style: none;
            padding: 4px 0;
        }
        .nav-tabs-scroll::-webkit-scrollbar {
            display: none;
        }
        .nav-tab {
            display: inline-flex;
            align-items: center;
            padding: 8px 20px;
            border-radius: 999px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            background: transparent;
            border: none;
            white-space: nowrap;
            transition: all .2s ease;
            text-decoration: none;
        }
        .nav-tab:hover {
            background: var(--primary-light);
            color: var(--primary);
        }
        .nav-tab.active {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 2px 8px rgba(37, 99, 235, .3);
        }
        .navbar-toggler {
            border: none;
            background: transparent;
            padding: 8px 10px;
            border-radius: 8px;
            color: var(--text-main);
        }
        .navbar-toggler:focus {
            box-shadow: none;
            outline: 2px solid var(--primary);
        }
        .mobile-search {
            padding: 12px 20px;
            background: var(--bg-page);
        }
        .mobile-search input {
            width: 100%;
            height: 40px;
            border-radius: 999px;
            border: 1px solid var(--border);
            padding: 0 16px;
            font-size: 14px;
            outline: none;
        }
        .mobile-search input:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(37, 99, 235, .15);
        }
        /* Hero */
        .hero-section {
            position: relative;
            padding: 80px 0 100px;
            background: linear-gradient(180deg, #F0F5FF 0%, var(--bg-page) 100%);
            overflow: hidden;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-image: radial-gradient(rgba(37, 99, 235, .08) 1px, transparent 1px);
            background-size: 24px 24px;
            pointer-events: none;
        }
        .hero-content {
            position: relative;
            z-index: 2;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary-light);
            color: var(--primary-dark);
            border-radius: 999px;
            padding: 6px 16px;
            font-size: 13px;
            font-weight: 500;
            margin-bottom: 20px;
        }
        .hero-title {
            font-size: 40px;
            font-weight: 700;
            letter-spacing: -0.5px;
            line-height: 1.2;
            margin-bottom: 16px;
            color: var(--text-main);
        }
        .hero-title .highlight {
            color: var(--primary);
        }
        .hero-subtitle {
            font-size: 18px;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 32px;
            max-width: 480px;
        }
        .hero-btns {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }
        .hero-visual {
            position: relative;
            z-index: 2;
        }
        .hero-panel {
            background: #fff;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-md);
            padding: 12px;
            border: 1px solid var(--border);
            position: relative;
        }
        .hero-panel img {
            width: 100%;
            border-radius: 12px;
            aspect-ratio: 4/3;
            object-fit: cover;
        }
        .hero-float-card {
            position: absolute;
            bottom: -24px;
            left: -24px;
            background: #fff;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-md);
            padding: 16px 20px;
            display: flex;
            align-items: center;
            gap: 12px;
            border: 1px solid var(--border);
        }
        .hero-float-card .num {
            font-size: 32px;
            font-weight: 700;
            color: var(--primary);
            line-height: 1;
        }
        .hero-float-card .label {
            font-size: 13px;
            color: var(--text-secondary);
        }
        .hero-float-card .trend {
            font-size: 14px;
            font-weight: 600;
            color: var(--success);
        }
        /* Feature Cards */
        .feature-card {
            background: #fff;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            padding: 28px;
            height: 100%;
            transition: all .25s ease;
            position: relative;
            overflow: hidden;
        }
        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 4px;
            height: 100%;
            background: var(--primary);
            opacity: 0;
            transition: opacity .25s ease;
        }
        .feature-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }
        .feature-card:hover::before {
            opacity: 1;
        }
        .feature-card .icon-box {
            width: 56px;
            height: 56px;
            border-radius: 12px;
            background: var(--primary-light);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
            transition: all .25s ease;
        }
        .feature-card:hover .icon-box {
            background: var(--primary);
        }
        .feature-card:hover .icon-box svg {
            stroke: #fff;
        }
        .feature-card .icon-box svg {
            width: 26px;
            height: 26px;
            stroke: var(--primary);
            stroke-width: 2;
            fill: none;
            stroke-linecap: round;
            stroke-linejoin: round;
            transition: stroke .25s ease;
        }
        .feature-card h3 {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 10px;
            color: var(--text-main);
        }
        .feature-card p {
            font-size: 14px;
            line-height: 1.65;
            color: var(--text-secondary);
            margin-bottom: 14px;
        }
        .feature-card .learn-more {
            font-size: 14px;
            font-weight: 500;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: gap .2s ease;
        }
        .feature-card .learn-more:hover {
            gap: 8px;
        }
        /* Advantage Section */
        .advantage-section {
            background: var(--bg-block);
        }
        .advantage-item {
            display: flex;
            gap: 16px;
            padding: 20px;
            background: #fff;
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            margin-bottom: 16px;
            transition: all .25s ease;
        }
        .advantage-item:hover {
            box-shadow: var(--shadow-md);
            transform: translateX(4px);
        }
        .advantage-item .adv-icon {
            flex-shrink: 0;
            width: 44px;
            height: 44px;
            border-radius: 10px;
            background: var(--primary-light);
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .advantage-item .adv-icon svg {
            width: 22px;
            height: 22px;
            stroke: var(--primary);
            stroke-width: 2;
            fill: none;
            stroke-linecap: round;
            stroke-linejoin: round;
        }
        .advantage-item h4 {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 4px;
        }
        .advantage-item p {
            font-size: 14px;
            color: var(--text-secondary);
            margin: 0;
        }
        /* Scenario Cards */
        .scenario-card {
            background: #fff;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            padding: 28px 24px;
            height: 100%;
            transition: all .25s ease;
            position: relative;
            overflow: hidden;
        }
        .scenario-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }
        .scenario-card .scenario-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: var(--secondary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            margin-bottom: 16px;
        }
        .scenario-card .scenario-icon svg {
            width: 22px;
            height: 22px;
            stroke: #fff;
            stroke-width: 2;
            fill: none;
            stroke-linecap: round;
            stroke-linejoin: round;
        }
        .scenario-card h3 {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 10px;
        }
        .scenario-card p {
            font-size: 14px;
            color: var(--text-secondary);
            margin: 0;
            line-height: 1.65;
        }
        .scenario-card .scenario-tag {
            display: inline-block;
            margin-top: 12px;
            font-size: 12px;
            font-weight: 500;
            color: var(--secondary);
            background: rgba(15, 163, 163, .1);
            border-radius: 6px;
            padding: 4px 10px;
        }
        /* Process Steps */
        .process-section {
            background: var(--bg-block);
        }
        .process-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .process-step {
            background: #fff;
            border-radius: var(--radius-lg);
            padding: 32px 24px;
            text-align: center;
            border: 1px solid var(--border);
            position: relative;
            transition: all .25s ease;
        }
        .process-step:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }
        .process-step .step-num {
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 20px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
        }
        .process-step h4 {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 8px;
        }
        .process-step p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.6;
            margin: 0;
        }
        .process-step::after {
            content: '→';
            position: absolute;
            right: -18px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--primary);
            font-size: 20px;
            font-weight: 700;
            z-index: 2;
        }
        .process-step:last-child::after {
            display: none;
        }
        /* FAQ */
        .faq-accordion .accordion-item {
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            background: #fff;
            overflow: hidden;
        }
        .faq-accordion .accordion-button {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-main);
            background: #fff;
            padding: 20px 24px;
            border: none;
            box-shadow: none;
            position: relative;
        }
        .faq-accordion .accordion-button::after {
            background: none;
            content: '+';
            font-size: 24px;
            font-weight: 400;
            color: var(--primary);
            line-height: 1;
            transition: transform .3s ease;
            transform: rotate(0);
        }
        .faq-accordion .accordion-button:not(.collapsed)::after {
            transform: rotate(45deg);
        }
        .faq-accordion .accordion-button:not(.collapsed) {
            background: #fff;
            color: var(--primary-dark);
            box-shadow: inset 0 3px 0 var(--primary);
        }
        .faq-accordion .accordion-button:focus {
            box-shadow: none;
            border: none;
        }
        .faq-accordion .accordion-body {
            padding: 0 24px 20px;
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.7;
            background: #fff;
        }
        /* CTA Form */
        .cta-section {
            background: #fff;
        }
        .cta-info {
            padding: 32px 0;
        }
        .cta-info .cta-title {
            font-size: 32px;
            font-weight: 700;
            letter-spacing: -0.5px;
            margin-bottom: 16px;
        }
        .cta-info .cta-desc {
            font-size: 16px;
            color: var(--text-secondary);
            margin-bottom: 24px;
        }
        .cta-points {
            list-style: none;
            padding: 0;
            margin: 0 0 24px;
        }
        .cta-points li {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 15px;
            color: var(--text-main);
            padding: 6px 0;
        }
        .cta-points li .point-icon {
            width: 20px;
            height: 20px;
            border-radius: 50%;
            background: var(--success);
            color: #fff;
            font-size: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }
        .cta-phone {
            font-size: 26px;
            font-weight: 700;
            color: var(--primary);
            margin-top: 20px;
            display: block;
        }
        .cta-form-card {
            background: #fff;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-md);
            border: 1px solid var(--border);
            padding: 36px;
        }
        .cta-form-card .form-label {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 6px;
        }
        .cta-form-card .form-label .required {
            color: var(--danger);
        }
        .cta-form-card .form-control,
        .cta-form-card .form-select {
            height: 46px;
            border-radius: 10px;
            border: 1px solid #D1D9E6;
            background: #FBFCFE;
            font-size: 14px;
            color: var(--text-main);
            padding: 0 16px;
            transition: all .25s ease;
        }
        .cta-form-card .form-control:focus,
        .cta-form-card .form-select:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(37, 99, 235, .15);
            background: #fff;
        }
        .cta-form-card textarea.form-control {
            height: auto;
            padding: 12px 16px;
            min-height: 120px;
            resize: vertical;
        }
        .cta-form-card .btn-submit {
            width: 100%;
            height: 48px;
            border-radius: 10px;
            font-size: 16px;
            font-weight: 600;
            background: var(--primary);
            color: #fff;
            border: none;
            transition: all .25s ease;
            margin-top: 8px;
        }
        .cta-form-card .btn-submit:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }
        /* Footer */
        .site-footer {
            background: #0F172A;
            color: #94A3B8;
            padding: 70px 0 0;
            font-size: 14px;
        }
        .site-footer a {
            color: #94A3B8;
            text-decoration: none;
            transition: color .2s ease;
        }
        .site-footer a:hover {
            color: var(--primary-light);
        }
        .footer-info {
            padding-right: 20px;
        }
        .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 16px;
        }
        .footer-logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: var(--primary);
            border-radius: 10px;
        }
        .footer-logo-icon svg {
            width: 22px;
            height: 22px;
        }
        .footer-logo-text {
            font-size: 20px;
            font-weight: 700;
            color: #fff;
        }
        .footer-info p {
            font-size: 13px;
            line-height: 1.7;
            color: #8A94A6;
            margin-bottom: 20px;
        }
        .footer-social {
            display: flex;
            gap: 10px;
        }
        .social-btn {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(255, 255, 255, .08);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 13px;
            color: #C0C8D4;
            cursor: pointer;
            transition: all .25s ease;
        }
        .social-btn:hover {
            background: var(--primary);
            color: #fff;
        }
        .footer-title {
            font-size: 15px;
            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 {
            font-size: 14px;
        }
        .footer-contact-list {
            list-style: none;
            padding: 0;
            margin: 0;
            font-size: 14px;
        }
        .footer-contact-list li {
            display: flex;
            gap: 8px;
            margin-bottom: 10px;
            line-height: 1.5;
        }
        .footer-contact-list li svg {
            width: 18px;
            height: 18px;
            flex-shrink: 0;
            margin-top: 3px;
            color: var(--primary);
            fill: none;
            stroke: currentColor;
            stroke-width: 2;
            stroke-linecap: round;
            stroke-linejoin: round;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .08);
            margin-top: 50px;
            padding: 20px 0;
        }
        .footer-bottom .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
        }
        .footer-bottom .copyright {
            color: #8A94A6;
            font-size: 13px;
        }
        .footer-bottom-links {
            display: flex;
            gap: 20px;
            font-size: 13px;
        }
        .footer-bottom-links a {
            color: #8A94A6;
        }
        .footer-bottom-links a:hover {
            color: #fff;
        }
        /* Responsive */
        @media (max-width: 1199.98px) {
            .header-search {
                flex: 0 1 320px;
            }
        }
        @media (max-width: 991.98px) {
            .section {
                padding: 72px 0;
            }
            .header-search {
                display: none;
            }
            .header-cta .btn {
                display: none;
            }
            .header-nav {
                overflow-x: auto;
            }
            .nav-tabs-scroll {
                padding-bottom: 4px;
            }
            .hero-section {
                padding: 56px 0 80px;
            }
            .hero-title {
                font-size: 32px;
            }
            .hero-visual {
                margin-top: 48px;
            }
            .hero-float-card {
                left: 0;
                bottom: -16px;
            }
            .process-steps {
                grid-template-columns: repeat(2, 1fr);
            }
            .process-step:nth-child(2)::after {
                display: none;
            }
            .cta-info {
                padding: 0 0 32px;
            }
        }
        @media (max-width: 767.98px) {
            .section {
                padding: 56px 0;
            }
            .section-title {
                font-size: 26px;
            }
            .hero-title {
                font-size: 28px;
            }
            .hero-subtitle {
                font-size: 16px;
            }
            .hero-btns .btn {
                width: 100%;
            }
            .process-steps {
                grid-template-columns: 1fr;
            }
            .process-step::after {
                display: none;
            }
            .cta-form-card {
                padding: 24px;
            }
            .footer-bottom .container {
                flex-direction: column;
                text-align: center;
            }
            .footer-bottom-links {
                flex-wrap: wrap;
                justify-content: center;
            }
            .footer-logo-text {
                font-size: 18px;
            }
        }
        @media (max-width: 575.98px) {
            .hero-btns .btn {
                width: 100%;
                text-align: center;
            }
            .hero-float-card {
                display: none;
            }
            .cta-phone {
                font-size: 22px;
            }
            .nav-tab {
                padding: 6px 14px;
                font-size: 13px;
            }
            .section-title::before {
                width: 5px;
                height: 22px;
                margin-right: 8px;
            }
        }

/* roulang page: article */
:root {
            --primary: #2563EB;
            --primary-dark: #1D4FBF;
            --primary-light: #EAF1FE;
            --secondary: #14B8A6;
            --success: #10B981;
            --warning: #F59E0B;
            --danger: #EF4444;
            --info: #3B82F6;
            --bg-page: #F7F9FC;
            --bg-card: #FFFFFF;
            --bg-soft: #F1F5F9;
            --text-main: #1E293B;
            --text-secondary: #475569;
            --text-muted: #94A3B8;
            --border: #E2E8F0;
            --radius-lg: 16px;
            --radius-md: 12px;
            --radius-sm: 8px;
            --shadow-card: 0 1px 2px rgba(16,24,40,0.04), 0 4px 16px rgba(16,24,40,0.06);
            --shadow-hover: 0 4px 8px rgba(16,24,40,0.06), 0 12px 32px rgba(16,24,40,0.10);
            --shadow-nav: 0 1px 4px rgba(16,24,40,0.04), 0 6px 20px rgba(16,24,40,0.04);
            --font-family: "PingFang SC", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", system-ui, sans-serif;
            --bs-primary: #2563EB;
            --bs-primary-rgb: 37, 99, 235;
            --bs-link-color: #2563EB;
            --bs-link-color-rgb: 37, 99, 235;
            --bs-link-hover-color: #1D4FBF;
            --bs-link-hover-color-rgb: 29, 79, 191;
            --bs-body-font-family: var(--font-family);
            --bs-body-color: var(--text-main);
            --bs-body-bg: var(--bg-page);
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-family);
            background: var(--bg-page);
            color: var(--text-main);
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color .2s ease;
        }
        a:hover {
            color: var(--primary-dark);
        }
        img {
            max-width: 100%;
            height: auto;
        }
        .container {
            max-width: 1200px;
            padding-left: 24px;
            padding-right: 24px;
        }
        .btn {
            border-radius: 10px;
            font-weight: 600;
            padding: 10px 26px;
            transition: all .2s ease;
        }
        .btn-primary {
            --bs-btn-bg: var(--primary);
            --bs-btn-border-color: var(--primary);
            --bs-btn-hover-bg: var(--primary-dark);
            --bs-btn-hover-border-color: var(--primary-dark);
            --bs-btn-active-bg: #1747B8;
            --bs-btn-active-border-color: #1747B8;
            --bs-btn-disabled-bg: var(--primary);
            --bs-btn-disabled-border-color: var(--primary);
            border-radius: 10px;
            box-shadow: 0 2px 8px rgba(37,99,235,0.18);
        }
        .btn-primary:hover {
            transform: translateY(-1px);
            box-shadow: 0 6px 18px rgba(37,99,235,0.22);
        }
        .btn-outline-primary {
            --bs-btn-color: var(--primary);
            --bs-btn-border-color: var(--primary);
            --bs-btn-hover-bg: var(--primary-light);
            --bs-btn-hover-color: var(--primary-dark);
            --bs-btn-hover-border-color: var(--primary-dark);
            --bs-btn-active-bg: var(--primary-light);
            --bs-btn-active-border-color: var(--primary);
            border-radius: 10px;
        }
        .btn:focus-visible,
        .form-control:focus,
        .form-select:focus {
            outline: 3px solid rgba(37, 99, 235, 0.3);
            box-shadow: none;
            border-color: var(--primary);
        }

        /* ===== Header ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1030;
            background: #fff;
            box-shadow: var(--shadow-nav);
        }
        .header-top {
            height: 64px;
            border-bottom: 1px solid var(--border);
        }
        .header-top-inner {
            display: flex;
            align-items: center;
            gap: 16px;
            height: 100%;
        }
        .brand-logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .brand-logo-icon {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: var(--primary-light);
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .brand-logo-icon svg {
            width: 26px;
            height: 26px;
        }
        .brand-logo-text {
            font-size: 22px;
            font-weight: 700;
            color: var(--text-main);
            letter-spacing: -0.3px;
            white-space: nowrap;
        }
        .header-search {
            width: 360px;
            margin-left: auto;
            margin-right: 12px;
        }
        .header-search .form-control {
            border-radius: 50px;
            background: var(--bg-soft);
            border: 1px solid transparent;
            padding-left: 40px;
            height: 40px;
            font-size: 14px;
        }
        .header-search .form-control:focus {
            background: #fff;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(37,99,235,0.12);
        }
        .header-search {
            position: relative;
        }
        .search-icon {
            position: absolute;
            left: 14px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--text-muted);
            width: 16px;
            height: 16px;
            pointer-events: none;
        }
        .header-cta {
            white-space: nowrap;
            font-size: 14px;
            padding: 8px 20px;
            border-radius: 50px;
        }
        .navbar-toggler {
            border: none;
            background: none;
            width: 44px;
            height: 44px;
            padding: 8px;
            border-radius: 10px;
            display: inline-flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 5px;
        }
        .navbar-toggler span {
            display: block;
            width: 22px;
            height: 2px;
            background: var(--text-main);
            border-radius: 2px;
            transition: .3s;
        }
        .navbar-toggler:hover span {
            background: var(--primary);
        }
        .header-nav {
            background: var(--bg-page);
            border-bottom: 1px solid var(--border);
        }
        .nav-tabs-scroll {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 8px 0;
            overflow-x: auto;
            scrollbar-width: none;
            -webkit-overflow-scrolling: touch;
        }
        .nav-tabs-scroll::-webkit-scrollbar {
            display: none;
        }
        .nav-tab {
            display: inline-flex;
            align-items: center;
            padding: 7px 18px;
            border-radius: 50px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            background: transparent;
            white-space: nowrap;
            transition: all .2s ease;
        }
        .nav-tab:hover {
            background: var(--primary-light);
            color: var(--primary);
        }
        .nav-tab.active {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 2px 10px rgba(37,99,235,0.25);
        }
        .mobile-nav-panel {
            background: #fff;
            border-bottom: 1px solid var(--border);
            padding: 12px 24px 18px;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }
        .mobile-nav-link {
            padding: 10px 16px;
            border-radius: 10px;
            font-size: 15px;
            color: var(--text-secondary);
            transition: all .2s;
        }
        .mobile-nav-link:hover {
            background: var(--primary-light);
            color: var(--primary);
        }
        .mobile-nav-link.active {
            background: var(--primary);
            color: #fff;
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb-nav {
            background: var(--bg-soft);
            padding: 14px 0;
            border-bottom: 1px solid var(--border);
        }
        .breadcrumb-nav .breadcrumb {
            margin: 0;
            padding: 0;
            background: transparent;
        }
        .breadcrumb-nav .breadcrumb-item {
            font-size: 14px;
            color: var(--text-muted);
        }
        .breadcrumb-nav .breadcrumb-item a {
            color: var(--text-secondary);
            transition: color .2s;
        }
        .breadcrumb-nav .breadcrumb-item a:hover {
            color: var(--primary);
        }
        .breadcrumb-nav .breadcrumb-item.active {
            color: var(--text-main);
            max-width: 260px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
            display: inline-block;
            vertical-align: bottom;
        }
        .breadcrumb-nav .breadcrumb-item + .breadcrumb-item::before {
            color: var(--text-muted);
            content: "/";
        }

        /* ===== Article Main ===== */
        .article-main {
            padding: 56px 0 80px;
        }
        .article-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            padding: 48px;
            max-width: 880px;
            margin: 0 auto;
        }
        .article-header {
            margin-bottom: 32px;
            padding-bottom: 28px;
            border-bottom: 1px solid var(--border);
        }
        .article-title {
            font-size: 32px;
            font-weight: 700;
            line-height: 1.35;
            letter-spacing: -0.5px;
            color: var(--text-main);
            margin-bottom: 16px;
        }
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 8px 20px;
            font-size: 14px;
            color: var(--text-muted);
        }
        .meta-item {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            white-space: nowrap;
        }
        .meta-item svg {
            width: 14px;
            height: 14px;
            color: var(--text-muted);
            opacity: 0.8;
        }
        .meta-item a {
            color: var(--text-secondary);
        }
        .meta-item a:hover {
            color: var(--primary);
        }
        .article-content {
            font-size: 16px;
            line-height: 1.8;
            color: var(--text-main);
        }
        .article-content p {
            margin-bottom: 24px;
        }
        .article-content h2 {
            font-size: 24px;
            font-weight: 700;
            color: var(--text-main);
            border-left: 4px solid var(--primary);
            padding-left: 14px;
            margin: 40px 0 20px;
            line-height: 1.4;
        }
        .article-content h3 {
            font-size: 20px;
            font-weight: 600;
            color: var(--text-main);
            margin: 32px 0 16px;
        }
        .article-content h4 {
            font-size: 17px;
            font-weight: 600;
            color: var(--text-main);
            margin: 24px 0 12px;
        }
        .article-content ul,
        .article-content ol {
            padding-left: 24px;
            margin: 16px 0 24px;
        }
        .article-content li {
            margin-bottom: 8px;
        }
        .article-content blockquote {
            background: var(--bg-soft);
            border-left: 4px solid var(--primary);
            padding: 16px 20px;
            border-radius: 0 12px 12px 0;
            font-style: italic;
            color: var(--text-secondary);
            margin: 24px 0;
            font-size: 15px;
        }
        .article-content blockquote p:last-child {
            margin-bottom: 0;
        }
        .article-content img {
            max-width: 100%;
            height: auto;
            border-radius: var(--radius-md);
            margin: 24px 0;
            display: block;
        }
        .article-content figure {
            margin: 24px 0;
        }
        .article-content figcaption {
            font-size: 13px;
            color: var(--text-muted);
            text-align: center;
            margin-top: 8px;
        }
        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 24px 0;
            font-size: 15px;
        }
        .article-content table th,
        .article-content table td {
            border: 1px solid var(--border);
            padding: 12px 16px;
            text-align: left;
        }
        .article-content table th {
            background: var(--bg-soft);
            font-weight: 600;
        }
        .article-content a {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 3px;
        }
        .article-content a:hover {
            color: var(--primary-dark);
        }
        .article-content code {
            background: var(--primary-light);
            color: var(--primary-dark);
            padding: 2px 7px;
            border-radius: 6px;
            font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
            font-size: 0.88em;
        }
        .article-content pre {
            background: #0F172A;
            color: #E2E8F0;
            padding: 20px 24px;
            border-radius: var(--radius-md);
            overflow-x: auto;
            margin: 24px 0;
            line-height: 1.6;
        }
        .article-content pre code {
            background: transparent;
            color: inherit;
            padding: 0;
            font-size: 14px;
        }
        .article-content .table-wrap {
            overflow-x: auto;
        }

        /* ===== Empty State ===== */
        .article-empty {
            text-align: center;
            padding: 80px 20px;
        }
        .empty-icon {
            width: 68px;
            height: 68px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 30px;
            font-weight: 700;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
        }
        .article-empty h2 {
            font-size: 24px;
            font-weight: 700;
            margin-bottom: 12px;
        }
        .article-empty p {
            color: var(--text-muted);
            margin-bottom: 28px;
        }

        /* ===== Related ===== */
        .related-section {
            padding: 80px 0;
            background: var(--bg-page);
        }
        .section-head {
            margin-bottom: 36px;
        }
        .section-subtitle {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 10px;
            letter-spacing: 0.05em;
            text-transform: uppercase;
        }
        .section-subtitle::before {
            content: "";
            width: 22px;
            height: 3px;
            background: var(--primary);
            border-radius: 2px;
        }
        .section-head h2 {
            font-size: 30px;
            font-weight: 700;
            color: var(--text-main);
            margin: 0;
            letter-spacing: -0.4px;
        }
        .related-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            height: 100%;
            display: flex;
            flex-direction: column;
            transition: all .25s ease;
            border: 1px solid rgba(226, 232, 240, 0.5);
        }
        .related-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .related-card .card-img-wrap {
            aspect-ratio: 16 / 9;
            overflow: hidden;
            position: relative;
        }
        .related-card .card-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .4s ease;
        }
        .related-card:hover .card-img-wrap img {
            transform: scale(1.04);
        }
        .related-card .card-body {
            padding: 20px 24px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .related-card .card-date {
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            gap: 5px;
        }
        .related-card .card-title {
            font-size: 17px;
            font-weight: 600;
            color: var(--text-main);
            line-height: 1.45;
            margin-bottom: 10px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .card-text {
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 16px;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .card-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: gap .2s ease;
        }
        .related-card .card-link svg {
            width: 14px;
            height: 14px;
            transition: transform .2s ease;
        }
        .related-card .card-link:hover {
            color: var(--primary-dark);
            gap: 7px;
        }
        .back-entry {
            text-align: center;
            margin-top: 40px;
        }
        .back-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-secondary);
            padding: 10px 22px;
            border-radius: 50px;
            background: var(--bg-card);
            border: 1px solid var(--border);
            transition: all .2s ease;
        }
        .back-link:hover {
            color: var(--primary);
            border-color: var(--primary);
            background: var(--primary-light);
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 80px 0;
            position: relative;
            background: var(--bg-soft) url('/assets/images/backpic/back-2.png') center / cover no-repeat;
        }
        .cta-section::before {
            content: "";
            position: absolute;
            inset: 0;
            background: rgba(247, 249, 252, 0.92);
            pointer-events: none;
        }
        .cta-box {
            position: relative;
            text-align: center;
            max-width: 720px;
            margin: 0 auto;
            padding: 20px;
        }
        .cta-box h2 {
            font-size: 30px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 14px;
            letter-spacing: -0.4px;
        }
        .cta-box p {
            font-size: 16px;
            color: var(--text-secondary);
            margin-bottom: 28px;
        }
        .cta-box .btn {
            padding: 12px 36px;
            font-size: 16px;
            border-radius: 50px;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #0F172A;
            color: #CBD5E1;
            padding: 72px 0 0;
        }
        .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 16px;
        }
        .footer-logo .brand-logo-icon {
            background: rgba(37, 99, 235, 0.2);
            border-radius: 10px;
        }
        .footer-logo .brand-logo-icon svg .shield-bg {
            fill: none;
            stroke: #60A5FA;
        }
        .footer-logo .brand-logo-icon svg .shield-fill {
            fill: #2563EB;
        }
        .footer-logo-text {
            font-size: 22px;
            font-weight: 700;
            color: #fff;
        }
        .footer-info p {
            font-size: 14px;
            line-height: 1.7;
            color: #94A3B8;
            margin-bottom: 20px;
            max-width: 360px;
        }
        .footer-social {
            display: flex;
            gap: 10px;
        }
        .social-btn {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 13px;
            color: #CBD5E1;
            cursor: pointer;
            transition: all .2s ease;
        }
        .social-btn:hover {
            background: var(--primary);
            color: #fff;
        }
        .footer-title {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 18px;
        }
        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-links li {
            margin-bottom: 10px;
        }
        .footer-links a {
            color: #94A3B8;
            font-size: 14px;
            transition: color .2s ease;
        }
        .footer-links a:hover {
            color: #60A5FA;
        }
        .footer-contact-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-contact-list li {
            margin-bottom: 10px;
            font-size: 14px;
            color: #94A3B8;
            display: flex;
            align-items: flex-start;
            gap: 8px;
        }
        .footer-contact-list li span {
            color: #64748B;
            min-width: 60px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            margin-top: 48px;
            padding: 20px 0;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 10px;
            font-size: 13px;
            color: #64748B;
        }
        .footer-legal a {
            color: #64748B;
            font-size: 13px;
            margin-left: 18px;
            transition: color .2s;
        }
        .footer-legal a:hover {
            color: #94A3B8;
        }

        /* ===== Responsive ===== */
        @media (max-width: 991.98px) {
            .header-search {
                width: 280px;
            }
            .header-nav {
                position: sticky;
                top: 64px;
                z-index: 1020;
            }
            .article-card {
                padding: 36px 28px;
            }
            .article-title {
                font-size: 27px;
            }
        }
        @media (max-width: 767.98px) {
            .header-search {
                display: none !important;
            }
            .header-top {
                height: 60px;
            }
            .article-main {
                padding: 32px 0 56px;
            }
            .article-card {
                padding: 28px 20px;
                border-radius: 12px;
            }
            .article-title {
                font-size: 23px;
                line-height: 1.4;
            }
            .article-meta {
                gap: 6px 14px;
                font-size: 13px;
            }
            .article-content {
                font-size: 15px;
            }
            .article-content h2 {
                font-size: 20px;
            }
            .related-section {
                padding: 56px 0;
            }
            .section-head h2 {
                font-size: 25px;
            }
            .cta-section {
                padding: 56px 0;
            }
            .cta-box h2 {
                font-size: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .footer-legal a {
                margin-left: 10px;
                margin-right: 10px;
            }
        }
        @media (max-width: 575.98px) {
            .header-cta {
                display: none !important;
            }
            .article-card {
                padding: 24px 18px;
            }
            .article-title {
                font-size: 21px;
            }
            .article-meta {
                flex-direction: column;
                align-items: flex-start;
                gap: 4px 0;
            }
            .related-card .card-body {
                padding: 18px 18px 20px;
            }
            .breadcrumb-nav .breadcrumb-item:nth-child(3) {
                display: none;
            }
        }
        @media (min-width: 992px) {
            .header-nav.d-none.d-lg-block {
                display: block !important;
            }
        }