/* roulang page: index */
:root {
            --brand-blue: #1F5E8C;
            --brand-blue-dark: #174C6B;
            --brand-blue-deep: #122A38;
            --light-blue-bg: #EDF4FA;
            --light-blue-subtle: #F4F8FA;
            --text-primary: #152A38;
            --text-secondary: #526B7A;
            --accent-amber: #C4823C;
            --accent-cinnabar: #B4533B;
            --accent-trust: #2F7D6D;
            --border-line: #DCE5EC;
            --card-bg: #FFFFFF;
            --shadow-sm: 0 1px 2px rgba(21,42,56,0.05);
            --shadow-hover: 0 10px 30px rgba(21,42,56,0.12);
            --radius-card: 12px;
            --radius-btn: 999px;
            --radius-input: 12px;
            --radius-img: 8px;
            --font-serif: 'Noto Serif SC', 'Source Han Serif SC', serif;
            --font-sans: 'Noto Sans SC', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
            --transition-base: all 0.25s ease;
            --container-max: 1200px;
            --section-padding-lg: 76px;
            --section-padding-md: 56px;
            --section-padding-sm: 32px;
        }

        *, *::before, *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-sans);
            color: var(--text-primary);
            background-color: #FFFFFF;
            line-height: 1.7;
            font-size: 16px;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            overflow-x: hidden;
        }

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

        a:hover {
            color: var(--brand-blue-dark);
            text-decoration: none;
        }

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

        button, input, select, textarea {
            font-family: var(--font-sans);
        }

        button:focus-visible, a:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible {
            outline: 3px solid rgba(31,94,140,0.4);
            outline-offset: 2px;
        }

        .container-custom {
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        @media (max-width: 576px) {
            .container-custom {
                padding-left: 16px;
                padding-right: 16px;
            }
        }

        /* Header / Nav */
        .header-custom {
            background-color: #FFFFFF;
            border-bottom: 1px solid var(--border-line);
            position: sticky;
            top: 0;
            z-index: 1050;
            transition: box-shadow 0.3s ease;
        }

        .header-custom.scrolled {
            box-shadow: 0 4px 20px rgba(21,42,56,0.08);
        }

        .navbar-custom {
            padding: 12px 0;
            display: flex;
            align-items: center;
            gap: 20px;
            flex-wrap: wrap;
        }

        .navbar-custom .brand-logo {
            font-family: var(--font-serif);
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--brand-blue-dark);
            white-space: nowrap;
            letter-spacing: 0.02em;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .brand-logo .logo-icon {
            width: 36px;
            height: 36px;
            background: var(--brand-blue);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #FFF;
            font-size: 18px;
            flex-shrink: 0;
        }

        .nav-search-box {
            flex: 1 1 auto;
            max-width: 520px;
            min-width: 220px;
            position: relative;
            display: flex;
            align-items: center;
        }

        .nav-search-box input {
            width: 100%;
            padding: 10px 18px 10px 42px;
            border: 2px solid var(--border-line);
            border-radius: var(--radius-btn);
            font-size: 14px;
            background-color: var(--light-blue-subtle);
            color: var(--text-primary);
            transition: var(--transition-base);
        }

        .nav-search-box input:focus {
            border-color: var(--brand-blue);
            background-color: #FFFFFF;
            box-shadow: 0 0 0 4px rgba(31,94,140,0.08);
            outline: none;
        }

        .nav-search-box .search-icon {
            position: absolute;
            left: 16px;
            color: var(--text-secondary);
            font-size: 14px;
            pointer-events: none;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
            list-style: none;
            margin-left: auto;
        }

        .nav-links li a {
            display: inline-block;
            padding: 8px 16px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-primary);
            border-radius: var(--radius-btn);
            transition: var(--transition-base);
            white-space: nowrap;
        }

        .nav-links li a:hover {
            background-color: var(--light-blue-bg);
            color: var(--brand-blue);
        }

        .nav-links li a.active {
            background-color: var(--brand-blue);
            color: #FFFFFF;
        }

        .navbar-toggler-custom {
            display: none;
            background: none;
            border: 1px solid var(--border-line);
            border-radius: 8px;
            padding: 8px 12px;
            font-size: 20px;
            color: var(--text-primary);
            cursor: pointer;
            transition: var(--transition-base);
        }

        .navbar-toggler-custom:hover {
            background-color: var(--light-blue-bg);
        }

        .nav-mobile-collapse {
            display: none;
            width: 100%;
        }

        .nav-mobile-collapse.show {
            display: block;
        }

        .nav-mobile-collapse .nav-search-box {
            max-width: 100%;
            margin: 8px 0 12px;
        }

        .nav-mobile-collapse .nav-links {
            flex-direction: column;
            align-items: stretch;
            gap: 2px;
            margin: 0;
            padding: 0;
        }

        .nav-mobile-collapse .nav-links li a {
            display: block;
            padding: 10px 16px;
            border-radius: 8px;
        }

        @media (max-width: 991px) {
            .navbar-toggler-custom {
                display: block;
            }
            .nav-search-box.d-none-md {
                display: none;
            }
            .nav-links.d-none-md {
                display: none;
            }
            .nav-mobile-collapse {
                display: none;
                border-top: 1px solid var(--border-line);
                padding-top: 12px;
                margin-top: 8px;
            }
            .nav-mobile-collapse.show {
                display: block;
            }
        }

        @media (min-width: 992px) {
            .nav-search-box.d-none-md {
                display: flex;
            }
            .nav-links.d-none-md {
                display: flex;
            }
            .nav-mobile-collapse {
                display: none !important;
            }
        }

        /* Hero */
        .hero-section {
            position: relative;
            background-image: url('/assets/images/ef20184ed54f884b.jpg');
            background-size: cover;
            background-position: center;
            min-height: 620px;
            display: flex;
            align-items: center;
            overflow: hidden;
            clip-path: polygon(0 0, 100% 0, 100% calc(100% - 60px), 0 100%);
            margin-bottom: -30px;
        }

        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(105deg, rgba(18,42,56,0.88) 0%, rgba(31,94,140,0.72) 45%, rgba(18,42,56,0.55) 70%, rgba(18,42,56,0.4) 100%);
            z-index: 1;
        }

        .hero-overlay::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(115deg, rgba(18,42,56,0.3) 0%, transparent 40%);
            z-index: 1;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            padding: 80px 0 100px;
            color: #FFFFFF;
        }

        .hero-badge {
            display: inline-block;
            background-color: rgba(255,255,255,0.15);
            border: 1px solid rgba(255,255,255,0.3);
            border-radius: var(--radius-btn);
            padding: 6px 16px;
            font-size: 13px;
            font-weight: 500;
            letter-spacing: 0.04em;
            margin-bottom: 20px;
            backdrop-filter: blur(4px);
        }

        .hero-content h1 {
            font-family: var(--font-serif);
            font-size: clamp(28px, 3.2vw, 44px);
            font-weight: 700;
            line-height: 1.3;
            color: #FFFFFF;
            max-width: 680px;
            margin-bottom: 20px;
        }

        .hero-content .hero-subtitle {
            font-size: 16px;
            color: rgba(255,255,255,0.88);
            max-width: 620px;
            line-height: 1.8;
            margin-bottom: 30px;
        }

        .hero-search-row {
            display: flex;
            align-items: center;
            gap: 12px;
            max-width: 620px;
            flex-wrap: wrap;
        }

        .hero-search-wrap {
            flex: 1 1 320px;
            min-width: 260px;
            position: relative;
            display: flex;
            align-items: center;
        }

        .hero-search-wrap .search-icon {
            position: absolute;
            left: 18px;
            color: var(--text-secondary);
            font-size: 16px;
            pointer-events: none;
        }

        .hero-search-wrap input {
            width: 100%;
            padding: 14px 20px 14px 46px;
            border: none;
            border-radius: var(--radius-btn);
            font-size: 15px;
            background-color: #FFFFFF;
            color: var(--text-primary);
            box-shadow: 0 4px 20px rgba(0,0,0,0.15);
            transition: var(--transition-base);
        }

        .hero-search-wrap input:focus {
            outline: none;
            box-shadow: 0 8px 30px rgba(0,0,0,0.25);
        }

        .hero-cta-btn {
            padding: 14px 28px;
            border-radius: var(--radius-btn);
            border: none;
            font-size: 15px;
            font-weight: 600;
            cursor: pointer;
            background-color: var(--accent-amber);
            color: #FFFFFF;
            transition: var(--transition-base);
            white-space: nowrap;
        }

        .hero-cta-btn:hover {
            background-color: #B06E2A;
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(196,130,60,0.4);
        }

        .hero-side-card {
            background: rgba(255,255,255,0.12);
            border: 1px solid rgba(255,255,255,0.25);
            border-radius: var(--radius-card);
            padding: 24px;
            backdrop-filter: blur(8px);
            max-width: 280px;
            margin-left: auto;
        }

        .hero-side-card .side-label {
            font-size: 13px;
            color: rgba(255,255,255,0.75);
            letter-spacing: 0.05em;
            text-transform: uppercase;
            margin-bottom: 8px;
        }

        .hero-side-card .side-number {
            font-size: 36px;
            font-weight: 700;
            color: #FFFFFF;
            font-family: var(--font-serif);
            line-height: 1.2;
        }

        .hero-side-card .side-change {
            font-size: 14px;
            color: #7ED4A9;
            font-weight: 600;
            margin-top: 4px;
        }

        @media (max-width: 768px) {
            .hero-section {
                min-height: auto;
                clip-path: polygon(0 0, 100% 0, 100% calc(100% - 30px), 0 100%);
                margin-bottom: -15px;
            }
            .hero-content {
                padding: 60px 0 80px;
            }
            .hero-side-card {
                max-width: 100%;
                margin-left: 0;
                margin-top: 24px;
            }
        }

        /* Sections */
        .section-custom {
            padding: var(--section-padding-lg) 0;
        }

        .section-custom.alt-bg {
            background-color: var(--light-blue-subtle);
        }

        .section-custom.light-bg {
            background-color: var(--light-blue-bg);
        }

        .section-custom.deep-bg {
            background-color: var(--brand-blue-deep);
            color: #FFFFFF;
        }

        @media (max-width: 768px) {
            .section-custom {
                padding: var(--section-padding-md) 0;
            }
        }

        @media (max-width: 520px) {
            .section-custom {
                padding: var(--section-padding-sm) 0;
            }
        }

        .section-label {
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.08em;
            color: var(--accent-amber);
            text-transform: uppercase;
            margin-bottom: 10px;
            display: inline-block;
        }

        .section-title {
            font-family: var(--font-serif);
            font-size: clamp(22px, 2.4vw, 30px);
            font-weight: 700;
            color: var(--text-primary);
            line-height: 1.35;
            margin-bottom: 16px;
        }

        .section-desc {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.8;
            max-width: 680px;
        }

        .deep-bg .section-title {
            color: #FFFFFF;
        }
        .deep-bg .section-desc {
            color: rgba(255,255,255,0.75);
        }

        /* Cards */
        .card-custom {
            background: var(--card-bg);
            border: 1px solid var(--border-line);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-sm);
            transition: var(--transition-base);
            overflow: hidden;
            height: 100%;
        }

        .card-custom:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
            border-color: rgba(31,94,140,0.25);
        }

        .card-custom .card-body-pad {
            padding: 20px 24px;
        }

        .card-custom .card-title-sm {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 8px;
            line-height: 1.5;
        }

        .card-custom .card-text-sm {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* Buttons */
        .btn-primary-custom {
            background-color: var(--brand-blue);
            color: #FFFFFF;
            border: none;
            border-radius: var(--radius-btn);
            padding: 12px 24px;
            font-size: 15px;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition-base);
            display: inline-flex;
            align-items: center;
            gap: 8px;
            white-space: nowrap;
        }

        .btn-primary-custom:hover {
            background-color: var(--brand-blue-dark);
            color: #FFFFFF;
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(31,94,140,0.3);
        }

        .btn-accent {
            background-color: var(--accent-amber);
            color: #FFFFFF;
            border: none;
            border-radius: var(--radius-btn);
            padding: 12px 24px;
            font-size: 15px;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition-base);
            display: inline-flex;
            align-items: center;
            gap: 8px;
            white-space: nowrap;
        }

        .btn-accent:hover {
            background-color: #B06E2A;
            color: #FFFFFF;
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(196,130,60,0.35);
        }

        .btn-outline-custom {
            background: transparent;
            color: var(--brand-blue);
            border: 2px solid var(--brand-blue);
            border-radius: var(--radius-btn);
            padding: 10px 22px;
            font-size: 15px;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition-base);
            display: inline-flex;
            align-items: center;
            gap: 8px;
            white-space: nowrap;
        }

        .btn-outline-custom:hover {
            background-color: var(--brand-blue);
            color: #FFFFFF;
            transform: translateY(-2px);
        }

        /* Badge */
        .badge-heat {
            display: inline-block;
            background-color: rgba(196,130,60,0.12);
            color: var(--accent-amber);
            border: 1px solid rgba(196,130,60,0.25);
            border-radius: var(--radius-btn);
            padding: 4px 12px;
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 0.02em;
            white-space: nowrap;
        }

        .badge-cinnabar {
            background-color: rgba(180,83,59,0.12);
            color: var(--accent-cinnabar);
            border-color: rgba(180,83,59,0.25);
        }

        .badge-trust {
            background-color: rgba(47,125,109,0.12);
            color: var(--accent-trust);
            border-color: rgba(47,125,109,0.25);
        }

        /* Cover images */
        .cover-img {
            width: 100%;
            object-fit: cover;
            border-radius: var(--radius-img);
            aspect-ratio: 16 / 9;
        }

        .cover-img-4by3 {
            aspect-ratio: 4 / 3;
        }

        /* Indicator cards */
        .metric-card {
            background: #FFFFFF;
            border: 1px solid var(--border-line);
            border-radius: var(--radius-card);
            padding: 24px 22px;
            box-shadow: var(--shadow-sm);
            transition: var(--transition-base);
            height: 100%;
            display: flex;
            flex-direction: column;
            gap: 6px;
        }

        .metric-card:hover {
            box-shadow: var(--shadow-hover);
            border-color: rgba(31,94,140,0.2);
        }

        .metric-card .metric-icon {
            width: 42px;
            height: 42px;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            margin-bottom: 6px;
            flex-shrink: 0;
        }

        .metric-icon.blue {
            background-color: rgba(31,94,140,0.1);
            color: var(--brand-blue);
        }

        .metric-icon.amber {
            background-color: rgba(196,130,60,0.12);
            color: var(--accent-amber);
        }

        .metric-icon.green {
            background-color: rgba(47,125,109,0.12);
            color: var(--accent-trust);
        }

        .metric-icon.red {
            background-color: rgba(180,83,59,0.1);
            color: var(--accent-cinnabar);
        }

        .metric-card .metric-value {
            font-size: 30px;
            font-weight: 700;
            color: var(--text-primary);
            line-height: 1.2;
            font-feature-settings: 'tnum';
        }

        .metric-card .metric-unit {
            font-size: 13px;
            color: var(--text-secondary);
            font-weight: 500;
        }

        .metric-card .metric-change {
            font-size: 13px;
            font-weight: 600;
        }

        .metric-change.up {
            color: var(--accent-trust);
        }
        .metric-change.down {
            color: var(--accent-cinnabar);
        }

        /* Ranking list */
        .rank-list-item {
            display: flex;
            align-items: center;
            gap: 16px;
            padding: 16px 18px;
            background: #FFFFFF;
            border: 1px solid var(--border-line);
            border-radius: var(--radius-card);
            margin-bottom: 10px;
            transition: var(--transition-base);
        }

        .rank-list-item:hover {
            box-shadow: var(--shadow-sm);
            border-color: rgba(31,94,140,0.3);
            transform: translateX(4px);
        }

        .rank-number {
            font-family: var(--font-serif);
            font-size: 28px;
            font-weight: 700;
            color: var(--brand-blue);
            width: 44px;
            flex-shrink: 0;
            text-align: center;
        }

        .rank-number.top1 {
            color: var(--accent-amber);
        }
        .rank-number.top2 {
            color: var(--accent-cinnabar);
        }
        .rank-number.top3 {
            color: var(--accent-trust);
        }

        .rank-info {
            flex: 1;
            min-width: 0;
        }

        .rank-info .rank-title {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 4px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .rank-bar {
            height: 8px;
            background-color: var(--light-blue-bg);
            border-radius: 4px;
            overflow: hidden;
            margin-top: 6px;
        }

        .rank-bar-fill {
            height: 100%;
            background: linear-gradient(90deg, var(--brand-blue), var(--accent-amber));
            border-radius: 4px;
            transition: width 0.5s ease;
        }

        .rank-change {
            font-size: 13px;
            font-weight: 600;
            margin-left: 12px;
            flex-shrink: 0;
        }

        /* Service matrix */
        .service-card-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            margin-bottom: 14px;
        }

        /* Comparison */
        .compare-panel {
            background: #FFFFFF;
            border: 1px solid var(--border-line);
            border-radius: var(--radius-card);
            padding: 24px;
            box-shadow: var(--shadow-sm);
            height: 100%;
        }

        .compare-panel.highlight {
            border-color: var(--brand-blue);
            box-shadow: 0 4px 16px rgba(31,94,140,0.1);
        }

        .compare-panel .compare-header {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 14px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .compare-panel .compare-stat {
            font-size: 28px;
            font-weight: 700;
            color: var(--brand-blue);
            font-family: var(--font-serif);
        }

        .compare-bar {
            height: 10px;
            background-color: var(--light-blue-bg);
            border-radius: 5px;
            margin: 12px 0;
            overflow: hidden;
        }

        .compare-bar-fill {
            height: 100%;
            border-radius: 5px;
            background-color: var(--brand-blue);
        }

        .compare-bar-fill.warm {
            background-color: var(--accent-amber);
        }

        .compare-bar-fill.deep {
            background-color: var(--brand-blue-deep);
        }

        /* Timeline */
        .timeline-custom {
            position: relative;
            padding-left: 36px;
        }

        .timeline-custom::before {
            content: '';
            position: absolute;
            left: 10px;
            top: 8px;
            bottom: 8px;
            width: 2px;
            background-color: var(--border-line);
        }

        .timeline-item {
            position: relative;
            padding-bottom: 28px;
            padding-left: 12px;
        }

        .timeline-item:last-child {
            padding-bottom: 0;
        }

        .timeline-item::before {
            content: '';
            position: absolute;
            left: -33px;
            top: 8px;
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background-color: var(--brand-blue);
            border: 2px solid #FFFFFF;
            box-shadow: 0 0 0 3px rgba(31,94,140,0.2);
        }

        .timeline-item .tl-year {
            font-weight: 700;
            color: var(--brand-blue);
            font-size: 14px;
            margin-bottom: 4px;
        }

        .timeline-item .tl-text {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* Topic grid */
        .topic-card {
            position: relative;
            border-radius: var(--radius-card);
            overflow: hidden;
            border: 1px solid var(--border-line);
            height: 100%;
            transition: var(--transition-base);
        }

        .topic-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }

        .topic-card img {
            width: 100%;
            aspect-ratio: 16 / 9;
            object-fit: cover;
            display: block;
        }

        .topic-card-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(18,42,56,0.85) 0%, rgba(18,42,56,0.35) 50%, transparent 100%);
            display: flex;
            flex-direction: column;
            justify-content: flex-end;
            padding: 18px;
            border-radius: var(--radius-card);
        }

        .topic-card-overlay .topic-name {
            color: #FFFFFF;
            font-weight: 600;
            font-size: 15px;
            line-height: 1.4;
            margin-top: 6px;
        }

        /* News card */
        .news-card .card-body-pad {
            padding: 16px 18px;
        }

        .news-card .news-title {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            line-height: 1.5;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-card .news-excerpt {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-card .news-meta {
            font-size: 12px;
            color: var(--text-secondary);
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }

        .empty-state {
            border: 2px dashed var(--border-line);
            border-radius: var(--radius-card);
            padding: 40px 24px;
            text-align: center;
            color: var(--text-secondary);
            font-size: 15px;
            background-color: var(--light-blue-subtle);
        }

        /* Guarantee */
        .guarantee-item {
            display: flex;
            align-items: flex-start;
            gap: 14px;
            padding: 18px;
            background: #FFFFFF;
            border-radius: var(--radius-card);
            border: 1px solid var(--border-line);
            height: 100%;
            transition: var(--transition-base);
        }

        .guarantee-item:hover {
            border-color: rgba(31,94,140,0.25);
            box-shadow: var(--shadow-sm);
        }

        .guarantee-item .gi-icon {
            width: 44px;
            height: 44px;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            flex-shrink: 0;
            background-color: rgba(31,94,140,0.08);
            color: var(--brand-blue);
        }

        .guarantee-item .gi-title {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 4px;
        }

        .guarantee-item .gi-text {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin: 0;
        }

        /* Quick answers */
        .quick-answer-item {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            padding: 14px 16px;
            background: #FFFFFF;
            border-radius: 10px;
            border: 1px solid var(--border-line);
            margin-bottom: 8px;
            transition: var(--transition-base);
        }

        .quick-answer-item:hover {
            border-color: rgba(31,94,140,0.2);
        }

        .quick-answer-item .qa-number {
            font-size: 13px;
            font-weight: 700;
            color: var(--brand-blue);
            background-color: rgba(31,94,140,0.08);
            border-radius: 6px;
            padding: 2px 8px;
            flex-shrink: 0;
            margin-top: 2px;
        }

        .quick-answer-item .qa-content {
            flex: 1;
        }

        .quick-answer-item .qa-q {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 3px;
        }

        .quick-answer-item .qa-a {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.6;
            margin: 0;
        }

        /* FAQ Accordion */
        .accordion-custom .accordion-item {
            border: 1px solid var(--border-line);
            border-radius: var(--radius-card) !important;
            margin-bottom: 10px;
            overflow: hidden;
            background: #FFFFFF;
            box-shadow: var(--shadow-sm);
        }

        .accordion-custom .accordion-button {
            background: #FFFFFF;
            color: var(--text-primary);
            font-weight: 600;
            font-size: 15px;
            padding: 18px 22px;
            border: none;
            box-shadow: none;
            border-radius: var(--radius-card);
            display: flex;
            align-items: center;
            gap: 12px;
        }

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

        .accordion-custom .accordion-button:focus {
            box-shadow: none;
            border-color: var(--brand-blue);
            outline: 2px solid rgba(31,94,140,0.3);
            outline-offset: 0;
        }

        .accordion-custom .accordion-button::after {
            content: '\f067';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            background: none;
            color: var(--brand-blue);
            font-size: 14px;
            margin-left: auto;
            transition: transform 0.3s ease;
        }

        .accordion-custom .accordion-button:not(.collapsed)::after {
            content: '\f068';
            transform: rotate(0deg);
        }

        .accordion-custom .accordion-body {
            padding: 0 22px 18px;
            color: var(--text-secondary);
            font-size: 14px;
            line-height: 1.8;
        }

        /* Form */
        .subscribe-panel {
            background: linear-gradient(135deg, var(--brand-blue-deep) 0%, var(--brand-blue-dark) 50%, var(--brand-blue) 100%);
            border-radius: var(--radius-card);
            padding: 40px 36px;
            color: #FFFFFF;
            position: relative;
            overflow: hidden;
        }

        .subscribe-panel::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -60px;
            width: 200px;
            height: 200px;
            background: rgba(255,255,255,0.06);
            border-radius: 50%;
        }

        .subscribe-panel::after {
            content: '';
            position: absolute;
            bottom: -80px;
            left: -40px;
            width: 180px;
            height: 180px;
            background: rgba(255,255,255,0.04);
            border-radius: 50%;
        }

        .subscribe-panel .sub-title {
            font-family: var(--font-serif);
            font-size: clamp(20px, 2vw, 26px);
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 10px;
        }

        .subscribe-panel .sub-text {
            font-size: 14px;
            color: rgba(255,255,255,0.8);
            margin-bottom: 22px;
        }

        .subscribe-form {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
            position: relative;
            z-index: 2;
        }

        .subscribe-form input {
            flex: 1 1 260px;
            padding: 14px 18px;
            border: 2px solid rgba(255,255,255,0.3);
            border-radius: var(--radius-input);
            font-size: 15px;
            background-color: rgba(255,255,255,0.12);
            color: #FFFFFF;
            transition: var(--transition-base);
        }

        .subscribe-form input::placeholder {
            color: rgba(255,255,255,0.65);
        }

        .subscribe-form input:focus {
            outline: none;
            border-color: rgba(255,255,255,0.7);
            background-color: rgba(255,255,255,0.18);
        }

        .subscribe-form .btn-subscribe {
            padding: 14px 28px;
            border-radius: var(--radius-btn);
            border: none;
            font-size: 15px;
            font-weight: 600;
            cursor: pointer;
            background-color: var(--accent-amber);
            color: #FFFFFF;
            transition: var(--transition-base);
            white-space: nowrap;
        }

        .subscribe-form .btn-subscribe:hover {
            background-color: #B06E2A;
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(0,0,0,0.25);
        }

        .privacy-note {
            font-size: 12px;
            color: rgba(255,255,255,0.55);
            margin-top: 14px;
        }

        /* Footer */
        .footer-custom {
            background-color: var(--brand-blue-deep);
            color: rgba(255,255,255,0.8);
            padding: 50px 0 24px;
            margin-top: auto;
        }

        .footer-custom .footer-brand {
            font-family: var(--font-serif);
            font-size: 1.3rem;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 12px;
        }

        .footer-custom .footer-desc {
            font-size: 14px;
            color: rgba(255,255,255,0.6);
            line-height: 1.8;
        }

        .footer-custom .footer-heading {
            font-size: 14px;
            font-weight: 600;
            color: #FFFFFF;
            letter-spacing: 0.06em;
            margin-bottom: 14px;
            text-transform: uppercase;
        }

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

        .footer-custom ul li {
            margin-bottom: 8px;
        }

        .footer-custom ul li a {
            color: rgba(255,255,255,0.65);
            font-size: 14px;
            transition: var(--transition-base);
        }

        .footer-custom ul li a:hover {
            color: #FFFFFF;
            padding-left: 4px;
        }

        .footer-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
        }

        .footer-tags .ftag {
            background: rgba(255,255,255,0.08);
            border: 1px solid rgba(255,255,255,0.15);
            border-radius: var(--radius-btn);
            padding: 4px 12px;
            font-size: 12px;
            color: rgba(255,255,255,0.7);
            transition: var(--transition-base);
            cursor: default;
        }

        .footer-tags .ftag:hover {
            background: rgba(255,255,255,0.15);
            color: #FFFFFF;
        }

        .footer-custom .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.1);
            padding-top: 18px;
            margin-top: 36px;
            font-size: 13px;
            color: rgba(255,255,255,0.5);
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 10px;
        }

        @media (max-width: 768px) {
            .footer-custom .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* Utility spacing */
        .mt-2-custom { margin-top: 12px; }
        .mt-3-custom { margin-top: 20px; }
        .mt-4-custom { margin-top: 30px; }
        .mb-2-custom { margin-bottom: 12px; }
        .mb-3-custom { margin-bottom: 20px; }

        /* Responsive tweaks */
        @media (max-width: 991px) {
            .rank-number { font-size: 22px; width: 34px; }
            .metric-card .metric-value { font-size: 24px; }
        }

        @media (max-width: 768px) {
            .hero-side-card { max-width: 100%; }
            .rank-list-item { flex-wrap: wrap; gap: 8px; }
            .rank-change { margin-left: auto; }
            .timeline-custom { padding-left: 28px; }
            .timeline-item::before { left: -25px; }
            .subscribe-panel { padding: 28px 20px; }
        }

        @media (max-width: 520px) {
            .navbar-custom { gap: 12px; }
            .brand-logo { font-size: 1.1rem; }
            .hero-cta-btn { width: 100%; }
            .hero-search-wrap { min-width: 100%; }
            .section-title { font-size: 20px; }
            .card-body-pad { padding: 16px 18px; }
        }

/* roulang page: article */
:root {
            --brand-blue: #1F5E8C;
            --brand-blue-dark: #174C6B;
            --brand-blue-deep: #122A38;
            --light-blue-bg: #EDF4FA;
            --light-blue-subtle: #F4F8FA;
            --text-primary: #152A38;
            --text-secondary: #526B7A;
            --accent-amber: #C4823C;
            --accent-cinnabar: #B4533B;
            --accent-trust: #2F7D6D;
            --border-line: #DCE5EC;
            --card-bg: #FFFFFF;
            --shadow-sm: 0 1px 2px rgba(21,42,56,0.05);
            --shadow-hover: 0 10px 30px rgba(21,42,56,0.12);
            --radius-card: 12px;
            --radius-btn: 999px;
            --radius-input: 12px;
            --radius-img: 8px;
            --font-serif: 'Noto Serif SC', 'Source Han Serif SC', serif;
            --font-sans: 'Noto Sans SC', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
            --transition-base: all 0.25s ease;
            --container-max: 1200px;
            --section-padding-lg: 76px;
            --section-padding-md: 56px;
            --section-padding-sm: 32px;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-sans);
            color: var(--text-primary);
            background-color: #FFFFFF;
            line-height: 1.7;
            font-size: 16px;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            overflow-x: hidden;
        }
        a {
            text-decoration: none;
            color: var(--brand-blue);
            transition: var(--transition-base);
        }
        a:hover {
            color: var(--brand-blue-dark);
            text-decoration: none;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button, input, select, textarea {
            font-family: var(--font-sans);
        }
        button:focus-visible, a:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible {
            outline: 3px solid rgba(31,94,140,0.4);
            outline-offset: 2px;
        }
        .container-custom {
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }
        /* Header / Nav */
        .header-custom {
            background-color: #FFFFFF;
            border-bottom: 1px solid var(--border-line);
            position: sticky;
            top: 0;
            z-index: 1050;
            transition: box-shadow 0.3s ease;
        }
        .header-custom.scrolled {
            box-shadow: 0 4px 20px rgba(21,42,56,0.08);
        }
        .navbar-custom {
            padding: 12px 0;
            display: flex;
            align-items: center;
            gap: 20px;
            flex-wrap: wrap;
        }
        .navbar-custom .brand-logo {
            font-family: var(--font-serif);
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--brand-blue-dark);
            white-space: nowrap;
            letter-spacing: 0.02em;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .brand-logo .logo-icon {
            width: 36px;
            height: 36px;
            background: var(--brand-blue);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #FFF;
            font-size: 18px;
            flex-shrink: 0;
        }
        .nav-search-box {
            flex: 1 1 auto;
            max-width: 520px;
            min-width: 220px;
            position: relative;
            display: flex;
            align-items: center;
        }
        .nav-search-box input {
            width: 100%;
            padding: 10px 18px 10px 42px;
            border: 2px solid var(--border-line);
            border-radius: var(--radius-btn);
            font-size: 14px;
            background-color: var(--light-blue-subtle);
            color: var(--text-primary);
            transition: var(--transition-base);
        }
        .nav-search-box input:focus {
            border-color: var(--brand-blue);
            background-color: #FFFFFF;
            box-shadow: 0 0 0 4px rgba(31,94,140,0.08);
            outline: none;
        }
        .nav-search-box .search-icon {
            position: absolute;
            left: 16px;
            color: var(--text-secondary);
            font-size: 14px;
            pointer-events: none;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
            list-style: none;
            margin-left: auto;
            margin-bottom: 0;
            padding-left: 0;
        }
        .nav-links li a {
            display: inline-block;
            padding: 8px 16px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-primary);
            border-radius: var(--radius-btn);
            transition: var(--transition-base);
            white-space: nowrap;
        }
        .nav-links li a:hover {
            background-color: var(--light-blue-bg);
            color: var(--brand-blue);
        }
        .nav-links li a.active {
            background-color: var(--brand-blue);
            color: #FFFFFF;
        }
        .navbar-toggler-custom {
            display: none;
            background: none;
            border: 1px solid var(--border-line);
            border-radius: 8px;
            padding: 8px 12px;
            font-size: 20px;
            color: var(--text-primary);
            cursor: pointer;
            transition: var(--transition-base);
        }
        .navbar-toggler-custom:hover {
            background-color: var(--light-blue-bg);
        }
        .nav-mobile-collapse {
            display: none;
            width: 100%;
        }
        .d-none-md {
            display: flex;
        }
        /* Article Page Main */
        .article-main {
            flex: 1 1 auto;
            padding-bottom: var(--section-padding-lg);
            background-color: #FFFFFF;
        }
        .article-top {
            background-color: var(--light-blue-subtle);
            border-bottom: 1px solid var(--border-line);
            padding: 28px 0 20px;
        }
        .breadcrumb-custom {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 6px;
            font-size: 13px;
            color: var(--text-secondary);
            margin-bottom: 0;
        }
        .breadcrumb-custom a {
            color: var(--text-secondary);
            font-weight: 500;
        }
        .breadcrumb-custom a:hover {
            color: var(--brand-blue);
        }
        .breadcrumb-custom .separator {
            color: #9DB2C0;
            font-size: 12px;
        }
        .breadcrumb-custom .current {
            color: var(--text-primary);
            font-weight: 600;
            max-width: 320px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        .article-header-section {
            padding: 32px 0 24px;
        }
        .article-h1 {
            font-family: var(--font-serif);
            font-size: clamp(28px, 3.2vw, 44px);
            font-weight: 900;
            color: var(--text-primary);
            line-height: 1.38;
            letter-spacing: 0.01em;
            margin-bottom: 16px;
        }
        .article-summary {
            font-size: 17px;
            color: var(--text-secondary);
            line-height: 1.75;
            max-width: 780px;
            margin-bottom: 0;
        }
        .article-meta-bar {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 14px;
            padding: 16px 0;
            border-top: 1px solid var(--border-line);
            border-bottom: 1px solid var(--border-line);
            font-size: 13px;
            color: var(--text-secondary);
        }
        .article-meta-bar .meta-item {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            white-space: nowrap;
        }
        .article-meta-bar .meta-item i {
            color: var(--brand-blue);
            font-size: 13px;
        }
        .badge-heat {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            background-color: var(--light-blue-bg);
            color: var(--brand-blue-dark);
            font-size: 12px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: var(--radius-btn);
            white-space: nowrap;
        }
        .badge-heat.high {
            background-color: #FFF3E8;
            color: var(--accent-cinnabar);
        }
        .badge-heat i {
            font-size: 11px;
        }
        .article-content-section {
            padding: 40px 0 32px;
        }
        .article-content-wrapper {
            max-width: 720px;
        }
        .article-content {
            font-size: 16px;
            line-height: 1.85;
            color: var(--text-primary);
            word-break: break-word;
        }
        .article-content h2 {
            font-family: var(--font-serif);
            font-size: 24px;
            font-weight: 700;
            color: var(--text-primary);
            margin-top: 2em;
            margin-bottom: 0.8em;
            line-height: 1.4;
        }
        .article-content h3 {
            font-family: var(--font-serif);
            font-size: 19px;
            font-weight: 700;
            color: var(--text-primary);
            margin-top: 1.6em;
            margin-bottom: 0.6em;
            line-height: 1.5;
        }
        .article-content p {
            margin-bottom: 1em;
            color: var(--text-primary);
        }
        .article-content ul,
        .article-content ol {
            margin-bottom: 1.2em;
            padding-left: 1.4em;
        }
        .article-content li {
            margin-bottom: 0.5em;
            color: var(--text-primary);
        }
        .article-content blockquote {
            border-left: 4px solid var(--brand-blue);
            background-color: var(--light-blue-bg);
            padding: 16px 20px;
            margin: 1.5em 0;
            border-radius: 0 8px 8px 0;
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.75;
        }
        .article-content blockquote p {
            margin-bottom: 0;
            color: inherit;
        }
        .article-content img {
            border-radius: var(--radius-img);
            margin: 1.5em auto;
            max-height: 480px;
            object-fit: cover;
            width: 100%;
        }
        .article-content a {
            color: var(--brand-blue);
            border-bottom: 1px dashed rgba(31,94,140,0.4);
        }
        .article-content a:hover {
            color: var(--brand-blue-dark);
            border-bottom-color: var(--brand-blue-dark);
        }
        .article-content table {
            width: 100%;
            margin: 1.5em 0;
            border-collapse: collapse;
            font-size: 14px;
        }
        .article-content table th,
        .article-content table td {
            border: 1px solid var(--border-line);
            padding: 10px 14px;
            text-align: left;
        }
        .article-content table th {
            background-color: var(--light-blue-subtle);
            font-weight: 600;
            color: var(--text-primary);
        }
        .article-not-found {
            text-align: center;
            padding: 60px 20px;
            background-color: var(--light-blue-subtle);
            border-radius: var(--radius-card);
            border: 1px dashed var(--border-line);
        }
        .article-not-found h2 {
            font-family: var(--font-serif);
            font-size: 22px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 12px;
        }
        .article-not-found p {
            color: var(--text-secondary);
            margin-bottom: 18px;
        }
        .btn-primary-custom {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background-color: var(--brand-blue);
            color: #FFFFFF;
            border: 2px solid var(--brand-blue);
            padding: 10px 22px;
            font-size: 14px;
            font-weight: 600;
            border-radius: var(--radius-btn);
            transition: var(--transition-base);
            cursor: pointer;
            white-space: nowrap;
        }
        .btn-primary-custom:hover {
            background-color: var(--brand-blue-dark);
            border-color: var(--brand-blue-dark);
            color: #FFFFFF;
            transform: translateY(-1px);
            box-shadow: var(--shadow-hover);
        }
        .btn-outline-custom {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background-color: #FFFFFF;
            color: var(--brand-blue);
            border: 2px solid var(--brand-blue);
            padding: 10px 22px;
            font-size: 14px;
            font-weight: 600;
            border-radius: var(--radius-btn);
            transition: var(--transition-base);
            cursor: pointer;
            white-space: nowrap;
        }
        .btn-outline-custom:hover {
            background-color: var(--light-blue-bg);
            color: var(--brand-blue-dark);
            border-color: var(--brand-blue-dark);
            transform: translateY(-1px);
        }
        .btn-accent {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background-color: var(--accent-amber);
            color: #FFFFFF;
            border: 2px solid var(--accent-amber);
            padding: 10px 22px;
            font-size: 14px;
            font-weight: 600;
            border-radius: var(--radius-btn);
            transition: var(--transition-base);
            cursor: pointer;
            white-space: nowrap;
        }
        .btn-accent:hover {
            background-color: #A96E32;
            border-color: #A96E32;
            color: #FFFFFF;
            transform: translateY(-1px);
            box-shadow: var(--shadow-hover);
        }
        .article-tags-section {
            padding: 20px 0 28px;
            border-top: 1px solid var(--border-line);
        }
        .article-tags {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 10px;
        }
        .article-tags .tag-label {
            font-size: 13px;
            font-weight: 600;
            color: var(--text-secondary);
            margin-right: 4px;
        }
        .article-tags .tag-item {
            display: inline-block;
            padding: 5px 14px;
            background-color: var(--light-blue-bg);
            color: var(--brand-blue-dark);
            font-size: 13px;
            font-weight: 500;
            border-radius: var(--radius-btn);
            border: 1px solid transparent;
            transition: var(--transition-base);
            cursor: pointer;
        }
        .article-tags .tag-item:hover {
            background-color: #D9E7F2;
            color: var(--brand-blue);
            border-color: var(--border-line);
        }
        .article-tags .tag-item.hot {
            background-color: #FFF3E8;
            color: var(--accent-cinnabar);
        }
        .article-tags .tag-item.hot:hover {
            background-color: #FCE8D8;
        }
        .related-section {
            padding: 40px 0 32px;
            border-top: 1px solid var(--border-line);
        }
        .section-heading {
            font-family: var(--font-serif);
            font-size: clamp(22px, 2.4vw, 30px);
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 24px;
        }
        .card-custom {
            background: var(--card-bg);
            border: 1px solid var(--border-line);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-sm);
            transition: var(--transition-base);
            overflow: hidden;
            height: 100%;
        }
        .card-custom:hover {
            box-shadow: var(--shadow-hover);
            border-color: #C8D7E3;
            transform: translateY(-3px);
        }
        .card-custom .card-img-wrap {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16/9;
            background-color: var(--light-blue-subtle);
        }
        .card-custom .card-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .card-custom:hover .card-img-wrap img {
            transform: scale(1.04);
        }
        .card-custom .card-body-custom {
            padding: 16px 18px 18px;
        }
        .card-custom .card-title {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            line-height: 1.55;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .card-custom .card-title a {
            color: var(--text-primary);
        }
        .card-custom .card-title a:hover {
            color: var(--brand-blue);
        }
        .card-custom .card-desc {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 10px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .card-custom .card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 12px;
            color: var(--text-secondary);
        }
        .card-custom .card-meta .date {
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }
        .back-nav-section {
            padding: 20px 0 36px;
        }
        .back-nav-section .btn-group-custom {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }
        .subscribe-mini-section {
            padding: 32px 0 8px;
        }
        .subscribe-mini-card {
            background-color: var(--brand-blue-deep);
            border-radius: var(--radius-card);
            padding: 32px 32px 28px;
            color: #FFFFFF;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 20px;
            justify-content: space-between;
            box-shadow: 0 12px 36px rgba(18,42,56,0.18);
        }
        .subscribe-mini-card h2 {
            font-family: var(--font-serif);
            font-size: 20px;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 6px;
        }
        .subscribe-mini-card p {
            color: #B9CCD8;
            font-size: 14px;
            margin-bottom: 0;
        }
        .subscribe-mini-card .form-inline-custom {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
            align-items: center;
        }
        .subscribe-mini-card .form-inline-custom input {
            padding: 10px 16px;
            border: 2px solid rgba(255,255,255,0.25);
            border-radius: var(--radius-input);
            background-color: rgba(255,255,255,0.1);
            color: #FFFFFF;
            font-size: 14px;
            min-width: 240px;
            transition: var(--transition-base);
        }
        .subscribe-mini-card .form-inline-custom input::placeholder {
            color: #9DB2C0;
        }
        .subscribe-mini-card .form-inline-custom input:focus {
            border-color: rgba(255,255,255,0.6);
            background-color: rgba(255,255,255,0.15);
            outline: none;
        }
        .subscribe-mini-card .privacy-text {
            font-size: 12px;
            color: #7E95A6;
            margin-top: 8px;
        }
        /* Footer */
        .footer-custom {
            background-color: var(--brand-blue-deep);
            color: #B9CCD8;
            padding: 56px 0 28px;
            margin-top: auto;
        }
        .footer-brand {
            font-family: var(--font-serif);
            font-size: 1.2rem;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 12px;
        }
        .footer-desc {
            font-size: 14px;
            line-height: 1.7;
            color: #9DB2C0;
            margin-bottom: 0;
        }
        .footer-heading {
            font-size: 14px;
            font-weight: 600;
            color: #FFFFFF;
            margin-bottom: 14px;
            letter-spacing: 0.02em;
        }
        .footer-custom ul {
            list-style: none;
            padding-left: 0;
            margin-bottom: 0;
        }
        .footer-custom ul li {
            margin-bottom: 8px;
        }
        .footer-custom ul li a {
            color: #9DB2C0;
            font-size: 14px;
            transition: var(--transition-base);
        }
        .footer-custom ul li a:hover {
            color: #FFFFFF;
        }
        .footer-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .ftag {
            display: inline-block;
            padding: 4px 12px;
            background-color: rgba(255,255,255,0.08);
            color: #B9CCD8;
            font-size: 12px;
            border-radius: var(--radius-btn);
            transition: var(--transition-base);
            cursor: default;
        }
        .ftag:hover {
            background-color: rgba(255,255,255,0.16);
            color: #FFFFFF;
        }
        .mb-2-custom {
            margin-bottom: 8px;
        }
        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 8px;
            padding-top: 24px;
            margin-top: 32px;
            border-top: 1px solid rgba(255,255,255,0.1);
            font-size: 12px;
            color: #7E95A6;
        }
        /* Responsive */
        @media (max-width: 1024px) {
            .container-custom {
                padding-left: 20px;
                padding-right: 20px;
            }
            .navbar-custom {
                gap: 14px;
            }
            .nav-search-box {
                max-width: 360px;
            }
        }
        @media (max-width: 768px) {
            .d-none-md {
                display: none !important;
            }
            .navbar-toggler-custom {
                display: block;
                margin-left: auto;
            }
            .nav-mobile-collapse.show {
                display: block;
                padding-top: 12px;
            }
            .nav-mobile-collapse .nav-search-box {
                max-width: 100%;
                margin-bottom: 10px;
                display: flex;
            }
            .nav-mobile-collapse .nav-links {
                flex-direction: column;
                align-items: stretch;
                gap: 4px;
                margin-left: 0;
            }
            .nav-mobile-collapse .nav-links li a {
                display: block;
                padding: 10px 16px;
                text-align: center;
            }
            .navbar-custom .brand-logo {
                font-size: 1.15rem;
            }
            .navbar-custom {
                flex-wrap: nowrap;
            }
            .article-h1 {
                font-size: 24px;
            }
            .article-summary {
                font-size: 15px;
            }
            .article-meta-bar {
                gap: 10px;
                font-size: 12px;
            }
            .article-content {
                font-size: 15px;
                line-height: 1.8;
            }
            .article-content h2 {
                font-size: 21px;
            }
            .article-content h3 {
                font-size: 17px;
            }
            .subscribe-mini-card {
                padding: 24px 20px;
                flex-direction: column;
                align-items: flex-start;
            }
            .subscribe-mini-card .form-inline-custom {
                width: 100%;
            }
            .subscribe-mini-card .form-inline-custom input {
                min-width: 0;
                flex: 1 1 auto;
            }
            .article-main {
                padding-bottom: var(--section-padding-sm);
            }
            .footer-custom {
                padding: 36px 0 20px;
            }
        }
        @media (max-width: 520px) {
            .container-custom {
                padding-left: 12px;
                padding-right: 12px;
            }
            .navbar-custom {
                padding: 10px 0;
            }
            .navbar-custom .brand-logo {
                font-size: 1.05rem;
                gap: 6px;
            }
            .brand-logo .logo-icon {
                width: 30px;
                height: 30px;
                font-size: 15px;
                border-radius: 6px;
            }
            .navbar-toggler-custom {
                padding: 6px 10px;
                font-size: 17px;
            }
            .article-h1 {
                font-size: 21px;
                line-height: 1.45;
            }
            .article-summary {
                font-size: 14px;
            }
            .article-meta-bar {
                flex-direction: column;
                align-items: flex-start;
                gap: 6px;
            }
            .article-content {
                font-size: 14px;
                line-height: 1.75;
            }
            .article-content h2 {
                font-size: 19px;
            }
            .article-content h3 {
                font-size: 16px;
            }
            .article-tags .tag-item {
                font-size: 12px;
                padding: 4px 10px;
            }
            .section-heading {
                font-size: 19px;
            }
            .subscribe-mini-card h2 {
                font-size: 17px;
            }
            .subscribe-mini-card .form-inline-custom input {
                font-size: 13px;
                padding: 9px 14px;
            }
            .btn-primary-custom,
            .btn-outline-custom,
            .btn-accent {
                padding: 9px 16px;
                font-size: 13px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
        }

/* roulang page: category1 */
:root {
            --brand-blue: #1F5E8C;
            --brand-blue-dark: #174C6B;
            --brand-blue-deep: #122A38;
            --light-blue-bg: #EDF4FA;
            --light-blue-subtle: #F4F8FA;
            --text-primary: #152A38;
            --text-secondary: #526B7A;
            --accent-amber: #C4823C;
            --accent-cinnabar: #B4533B;
            --accent-trust: #2F7D6D;
            --border-line: #DCE5EC;
            --card-bg: #FFFFFF;
            --shadow-sm: 0 1px 2px rgba(21,42,56,0.05);
            --shadow-hover: 0 10px 30px rgba(21,42,56,0.12);
            --radius-card: 12px;
            --radius-btn: 999px;
            --radius-input: 12px;
            --radius-img: 8px;
            --font-serif: 'Noto Serif SC', 'Source Han Serif SC', serif;
            --font-sans: 'Noto Sans SC', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
            --transition-base: all 0.25s ease;
            --container-max: 1200px;
            --section-padding-lg: 76px;
            --section-padding-md: 56px;
            --section-padding-sm: 32px;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-sans);
            color: var(--text-primary);
            background-color: #FFFFFF;
            line-height: 1.7;
            font-size: 16px;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            overflow-x: hidden;
        }
        a {
            text-decoration: none;
            color: var(--brand-blue);
            transition: var(--transition-base);
        }
        a:hover {
            color: var(--brand-blue-dark);
            text-decoration: none;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button, input, select, textarea {
            font-family: var(--font-sans);
        }
        button:focus-visible, a:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible {
            outline: 3px solid rgba(31,94,140,0.4);
            outline-offset: 2px;
        }
        .container-custom {
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }
        /* Header / Nav */
        .header-custom {
            background-color: #FFFFFF;
            border-bottom: 1px solid var(--border-line);
            position: sticky;
            top: 0;
            z-index: 1050;
            transition: box-shadow 0.3s ease;
        }
        .header-custom.scrolled {
            box-shadow: 0 4px 20px rgba(21,42,56,0.08);
        }
        .navbar-custom {
            padding: 12px 0;
            display: flex;
            align-items: center;
            gap: 20px;
            flex-wrap: wrap;
        }
        .navbar-custom .brand-logo {
            font-family: var(--font-serif);
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--brand-blue-dark);
            white-space: nowrap;
            letter-spacing: 0.02em;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .brand-logo .logo-icon {
            width: 36px;
            height: 36px;
            background: var(--brand-blue);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #FFF;
            font-size: 18px;
            flex-shrink: 0;
        }
        .nav-search-box {
            flex: 1 1 auto;
            max-width: 520px;
            min-width: 220px;
            position: relative;
            display: flex;
            align-items: center;
        }
        .nav-search-box input {
            width: 100%;
            padding: 10px 18px 10px 42px;
            border: 2px solid var(--border-line);
            border-radius: var(--radius-btn);
            font-size: 14px;
            background-color: var(--light-blue-subtle);
            color: var(--text-primary);
            transition: var(--transition-base);
        }
        .nav-search-box input:focus {
            border-color: var(--brand-blue);
            background-color: #FFFFFF;
            box-shadow: 0 0 0 4px rgba(31,94,140,0.08);
            outline: none;
        }
        .nav-search-box .search-icon {
            position: absolute;
            left: 16px;
            color: var(--text-secondary);
            font-size: 14px;
            pointer-events: none;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
            list-style: none;
            margin-left: auto;
        }
        .nav-links li a {
            display: inline-block;
            padding: 8px 16px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-primary);
            border-radius: var(--radius-btn);
            transition: var(--transition-base);
            white-space: nowrap;
        }
        .nav-links li a:hover {
            background-color: var(--light-blue-bg);
            color: var(--brand-blue);
        }
        .nav-links li a.active {
            background-color: var(--brand-blue);
            color: #FFFFFF;
        }
        .navbar-toggler-custom {
            display: none;
            background: none;
            border: 1px solid var(--border-line);
            border-radius: 8px;
            padding: 8px 12px;
            font-size: 20px;
            color: var(--text-primary);
            cursor: pointer;
            transition: var(--transition-base);
        }
        .navbar-toggler-custom:hover {
            background-color: var(--light-blue-bg);
        }
        .nav-mobile-collapse {
            display: none;
            width: 100%;
        }
        .nav-mobile-collapse.show {
            display: block;
        }
        /* Section Common */
        .section-custom {
            padding: var(--section-padding-md) 0;
        }
        .section-alt {
            background-color: var(--light-blue-subtle);
        }
        .section-heading {
            margin-bottom: 36px;
        }
        .section-heading .section-kicker {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--accent-amber);
            text-transform: uppercase;
            letter-spacing: 0.08em;
            margin-bottom: 8px;
        }
        .section-heading h2 {
            font-family: var(--font-serif);
            font-size: clamp(22px, 2.4vw, 30px);
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 10px;
            line-height: 1.35;
        }
        .section-heading p {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 720px;
            margin-bottom: 0;
        }
        /* Buttons */
        .btn-accent {
            display: inline-block;
            background-color: var(--accent-amber);
            color: #FFFFFF;
            padding: 12px 28px;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 15px;
            border: none;
            transition: var(--transition-base);
            text-align: center;
            cursor: pointer;
        }
        .btn-accent:hover {
            background-color: #A96E2F;
            color: #FFFFFF;
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(196,130,60,0.25);
        }
        .btn-outline-custom {
            display: inline-block;
            background-color: transparent;
            color: var(--brand-blue);
            padding: 10px 24px;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 15px;
            border: 2px solid var(--brand-blue);
            transition: var(--transition-base);
            text-align: center;
            cursor: pointer;
        }
        .btn-outline-custom:hover {
            background-color: var(--brand-blue);
            color: #FFFFFF;
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(31,94,140,0.2);
        }
        .btn-primary-custom {
            display: inline-block;
            background-color: var(--brand-blue);
            color: #FFFFFF;
            padding: 12px 28px;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 15px;
            border: none;
            transition: var(--transition-base);
            text-align: center;
            cursor: pointer;
        }
        .btn-primary-custom:hover {
            background-color: var(--brand-blue-dark);
            color: #FFFFFF;
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(31,94,140,0.25);
        }
        /* Cards */
        .card-custom {
            background: var(--card-bg);
            border: 1px solid var(--border-line);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-sm);
            transition: var(--transition-base);
            overflow: hidden;
            height: 100%;
        }
        .card-custom:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
            border-color: rgba(31,94,140,0.25);
        }
        .card-custom .card-img-wrap {
            position: relative;
            overflow: hidden;
            border-radius: var(--radius-img) var(--radius-img) 0 0;
        }
        .card-custom .cover-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .card-custom:hover .cover-img {
            transform: scale(1.05);
        }
        .card-custom .card-body-custom {
            padding: 20px 22px 22px;
        }
        .card-custom .card-title-custom {
            font-family: var(--font-serif);
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .card-custom .card-text-custom {
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 14px;
            line-height: 1.65;
        }
        /* Badge */
        .badge-heat {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            background-color: rgba(180,83,59,0.1);
            color: var(--accent-cinnabar);
            font-size: 12px;
            font-weight: 700;
            padding: 4px 12px;
            border-radius: 999px;
            border: 1px solid rgba(180,83,59,0.2);
        }
        .badge-heat i {
            font-size: 10px;
        }
        .badge-region {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            background-color: var(--light-blue-bg);
            color: var(--brand-blue);
            font-size: 12px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 999px;
        }
        .badge-up {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            background-color: rgba(47,125,109,0.1);
            color: var(--accent-trust);
            font-size: 12px;
            font-weight: 700;
            padding: 4px 10px;
            border-radius: 999px;
            border: 1px solid rgba(47,125,109,0.2);
        }
        /* Hero / Category Banner */
        .category-banner {
            background: linear-gradient(135deg, #FFFFFF 0%, var(--light-blue-bg) 55%, #E8F0F7 100%);
            border-bottom: 1px solid var(--border-line);
            padding: 48px 0 40px;
        }
        .breadcrumb-custom {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-secondary);
            margin-bottom: 20px;
            flex-wrap: wrap;
        }
        .breadcrumb-custom a {
            color: var(--text-secondary);
            font-weight: 500;
        }
        .breadcrumb-custom a:hover {
            color: var(--brand-blue);
        }
        .breadcrumb-custom .divider {
            color: var(--border-line);
            font-size: 11px;
        }
        .breadcrumb-custom .current {
            color: var(--brand-blue);
            font-weight: 600;
        }
        .category-banner h1 {
            font-family: var(--font-serif);
            font-size: clamp(28px, 3.2vw, 44px);
            font-weight: 900;
            color: var(--text-primary);
            margin-bottom: 14px;
            line-height: 1.3;
            letter-spacing: 0.01em;
        }
        .category-banner .banner-desc {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 760px;
            line-height: 1.75;
            margin-bottom: 24px;
        }
        .category-banner .banner-search {
            max-width: 560px;
            position: relative;
        }
        .category-banner .banner-search input {
            width: 100%;
            padding: 14px 20px 14px 48px;
            border: 2px solid var(--border-line);
            border-radius: var(--radius-btn);
            font-size: 15px;
            background-color: #FFFFFF;
            color: var(--text-primary);
            transition: var(--transition-base);
            box-shadow: var(--shadow-sm);
        }
        .category-banner .banner-search input:focus {
            border-color: var(--brand-blue);
            box-shadow: 0 0 0 4px rgba(31,94,140,0.08);
            outline: none;
        }
        .category-banner .banner-search .search-icon {
            position: absolute;
            left: 18px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--text-secondary);
            font-size: 16px;
            pointer-events: none;
        }
        /* Filter Toolbar */
        .filter-toolbar {
            background: var(--card-bg);
            border: 1px solid var(--border-line);
            border-radius: var(--radius-card);
            padding: 18px 22px;
            margin-bottom: 32px;
            display: flex;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
        }
        .filter-toolbar .filter-label {
            font-size: 13px;
            font-weight: 600;
            color: var(--text-secondary);
            white-space: nowrap;
        }
        .filter-pills {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
            flex: 1;
        }
        .filter-pill {
            padding: 8px 18px;
            border-radius: 999px;
            font-size: 13px;
            font-weight: 500;
            color: var(--text-primary);
            background-color: #FFFFFF;
            border: 1px solid var(--border-line);
            cursor: pointer;
            transition: var(--transition-base);
            white-space: nowrap;
        }
        .filter-pill:hover {
            border-color: var(--brand-blue);
            color: var(--brand-blue);
            background-color: var(--light-blue-bg);
        }
        .filter-pill.active-pill {
            background-color: var(--brand-blue);
            color: #FFFFFF;
            border-color: var(--brand-blue);
        }
        .filter-select {
            padding: 8px 16px;
            border-radius: 10px;
            border: 1px solid var(--border-line);
            font-size: 13px;
            color: var(--text-primary);
            background-color: #FFFFFF;
            cursor: pointer;
            transition: var(--transition-base);
        }
        .filter-select:focus {
            border-color: var(--brand-blue);
            outline: none;
            box-shadow: 0 0 0 4px rgba(31,94,140,0.08);
        }
        /* Card Grid */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        /* Heat Indicator Bar */
        .heat-indicator-bar {
            background: var(--card-bg);
            border: 1px solid var(--border-line);
            border-radius: var(--radius-card);
            padding: 28px 30px;
        }
        .heat-indicator-bar .heat-bar-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 24px;
            flex-wrap: wrap;
            gap: 12px;
        }
        .heat-indicator-bar .heat-bar-header h3 {
            font-family: var(--font-serif);
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 0;
            color: var(--text-primary);
        }
        .heat-row {
            display: flex;
            align-items: center;
            gap: 16px;
            margin-bottom: 18px;
        }
        .heat-row:last-child {
            margin-bottom: 0;
        }
        .heat-row .heat-rank {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background-color: var(--light-blue-bg);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 15px;
            color: var(--brand-blue);
            flex-shrink: 0;
        }
        .heat-row .heat-rank.rank-1 {
            background-color: var(--accent-cinnabar);
            color: #FFFFFF;
        }
        .heat-row .heat-rank.rank-2 {
            background-color: var(--accent-amber);
            color: #FFFFFF;
        }
        .heat-row .heat-rank.rank-3 {
            background-color: var(--accent-trust);
            color: #FFFFFF;
        }
        .heat-row .heat-info {
            flex: 1;
            min-width: 120px;
        }
        .heat-row .heat-info .heat-name {
            font-weight: 600;
            font-size: 15px;
            color: var(--text-primary);
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }
        .heat-row .heat-info .heat-change {
            font-size: 13px;
            color: var(--text-secondary);
        }
        .heat-row .heat-bar-track {
            flex: 2;
            min-width: 150px;
            height: 8px;
            background-color: var(--light-blue-bg);
            border-radius: 999px;
            overflow: hidden;
        }
        .heat-row .heat-bar-track .heat-bar-fill {
            height: 100%;
            border-radius: 999px;
            background: linear-gradient(90deg, var(--brand-blue), var(--accent-amber));
            transition: width 0.6s ease;
        }
        .heat-row .heat-value {
            font-weight: 700;
            font-size: 18px;
            color: var(--brand-blue-dark);
            min-width: 70px;
            text-align: right;
            font-variant-numeric: tabular-nums;
        }
        /* Topic List */
        .topic-list-card {
            display: flex;
            gap: 18px;
            background: var(--card-bg);
            border: 1px solid var(--border-line);
            border-radius: var(--radius-card);
            padding: 18px;
            transition: var(--transition-base);
            align-items: center;
            margin-bottom: 16px;
        }
        .topic-list-card:hover {
            box-shadow: var(--shadow-hover);
            border-color: rgba(31,94,140,0.25);
            transform: translateY(-2px);
        }
        .topic-list-card .topic-thumb {
            width: 120px;
            height: 80px;
            border-radius: var(--radius-img);
            overflow: hidden;
            flex-shrink: 0;
        }
        .topic-list-card .topic-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .topic-list-card .topic-info {
            flex: 1;
        }
        .topic-list-card .topic-title {
            font-weight: 700;
            font-size: 1.02rem;
            color: var(--text-primary);
            margin-bottom: 4px;
            line-height: 1.45;
        }
        .topic-list-card .topic-meta {
            font-size: 13px;
            color: var(--text-secondary);
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }
        /* Dynamic list */
        .dynamic-list-item {
            display: flex;
            gap: 14px;
            padding: 16px 0;
            border-bottom: 1px dashed var(--border-line);
            align-items: flex-start;
        }
        .dynamic-list-item:last-child {
            border-bottom: none;
        }
        .dynamic-list-item .dynamic-date {
            min-width: 90px;
            font-size: 13px;
            color: var(--text-secondary);
            font-weight: 500;
            padding-top: 2px;
        }
        .dynamic-list-item .dynamic-content {
            flex: 1;
        }
        .dynamic-list-item .dynamic-title {
            font-weight: 600;
            font-size: 15px;
            color: var(--text-primary);
            margin-bottom: 4px;
            line-height: 1.5;
        }
        .dynamic-list-item .dynamic-summary {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.65;
        }
        /* FAQ */
        .faq-accordion-custom .accordion-item {
            background: var(--card-bg);
            border: 1px solid var(--border-line);
            border-radius: var(--radius-card) !important;
            margin-bottom: 14px;
            overflow: hidden;
            box-shadow: var(--shadow-sm);
        }
        .faq-accordion-custom .accordion-header {
            margin: 0;
        }
        .faq-accordion-custom .accordion-button {
            background: var(--card-bg);
            color: var(--text-primary);
            font-weight: 700;
            font-size: 16px;
            padding: 20px 24px;
            border: none;
            box-shadow: none;
            border-radius: var(--radius-card) !important;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
        }
        .faq-accordion-custom .accordion-button:not(.collapsed) {
            background-color: var(--light-blue-bg);
            color: var(--brand-blue-dark);
            box-shadow: none;
        }
        .faq-accordion-custom .accordion-button:focus {
            box-shadow: 0 0 0 4px rgba(31,94,140,0.08);
            outline: none;
        }
        .faq-accordion-custom .accordion-button::after {
            display: none;
        }
        .faq-accordion-custom .accordion-button .faq-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 32px;
            height: 32px;
            background-color: var(--light-blue-bg);
            border-radius: 50%;
            font-size: 14px;
            color: var(--brand-blue);
            flex-shrink: 0;
            transition: transform 0.3s ease;
        }
        .faq-accordion-custom .accordion-button:not(.collapsed) .faq-icon {
            background-color: var(--brand-blue);
            color: #FFFFFF;
            transform: rotate(45deg);
        }
        .faq-accordion-custom .accordion-body {
            padding: 18px 24px 22px;
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.75;
            border-top: 1px solid var(--border-line);
        }
        /* CTA Card */
        .cta-card-category {
            background: linear-gradient(135deg, var(--brand-blue-deep) 0%, var(--brand-blue-dark) 55%, var(--brand-blue) 100%);
            border-radius: var(--radius-card);
            padding: 40px 36px;
            color: #FFFFFF;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 28px;
            flex-wrap: wrap;
        }
        .cta-card-category .cta-text h3 {
            font-family: var(--font-serif);
            font-size: clamp(20px, 2vw, 26px);
            font-weight: 700;
            margin-bottom: 8px;
            color: #FFFFFF;
            line-height: 1.4;
        }
        .cta-card-category .cta-text p {
            font-size: 15px;
            color: rgba(255,255,255,0.8);
            margin-bottom: 0;
            line-height: 1.7;
            max-width: 520px;
        }
        .cta-card-category .cta-form {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
            min-width: 280px;
            max-width: 420px;
        }
        .cta-card-category .cta-form input {
            flex: 1;
            min-width: 200px;
            padding: 12px 18px;
            border-radius: 10px;
            border: none;
            font-size: 14px;
            background-color: rgba(255,255,255,0.95);
            color: var(--text-primary);
            transition: var(--transition-base);
        }
        .cta-card-category .cta-form input:focus {
            outline: none;
            box-shadow: 0 0 0 4px rgba(255,255,255,0.2);
        }
        .cta-card-category .cta-form .btn-accent {
            padding: 12px 22px;
            white-space: nowrap;
        }
        /* Footer */
        .footer-custom {
            background-color: var(--brand-blue-deep);
            color: rgba(255,255,255,0.85);
            padding: 48px 0 24px;
            margin-top: auto;
        }
        .footer-brand {
            font-family: var(--font-serif);
            font-size: 1.2rem;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 12px;
        }
        .footer-desc {
            font-size: 14px;
            color: rgba(255,255,255,0.7);
            line-height: 1.7;
        }
        .footer-heading {
            font-size: 15px;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 16px;
            letter-spacing: 0.02em;
        }
        .footer-custom ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-custom ul li {
            margin-bottom: 10px;
        }
        .footer-custom ul li a {
            color: rgba(255,255,255,0.75);
            font-size: 14px;
            transition: var(--transition-base);
        }
        .footer-custom ul li a:hover {
            color: #FFFFFF;
            padding-left: 4px;
        }
        .footer-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .ftag {
            display: inline-block;
            padding: 5px 14px;
            background-color: rgba(255,255,255,0.08);
            border: 1px solid rgba(255,255,255,0.15);
            border-radius: 999px;
            font-size: 12px;
            color: rgba(255,255,255,0.8);
            transition: var(--transition-base);
        }
        .ftag:hover {
            background-color: rgba(255,255,255,0.15);
            color: #FFFFFF;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.12);
            margin-top: 36px;
            padding-top: 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 13px;
            color: rgba(255,255,255,0.55);
        }
        .mb-2-custom {
            margin-bottom: 14px !important;
        }
        /* Responsive */
        @media (max-width: 1024px) {
            .card-grid {
                grid-template-columns: repeat(3, 1fr);
                gap: 18px;
            }
            .category-banner {
                padding: 36px 0 32px;
            }
            .section-custom {
                padding: 48px 0;
            }
        }
        @media (max-width: 768px) {
            .navbar-custom {
                flex-wrap: nowrap;
            }
            .navbar-custom .d-none-md {
                display: none !important;
            }
            .navbar-toggler-custom {
                display: block;
                margin-left: auto;
            }
            .nav-mobile-collapse {
                padding-top: 12px;
                border-top: 1px solid var(--border-line);
                margin-top: 8px;
            }
            .nav-mobile-collapse .nav-search-box {
                max-width: 100%;
                margin-bottom: 10px;
            }
            .nav-mobile-collapse .nav-links {
                flex-direction: column;
                align-items: flex-start;
                margin-left: 0;
                gap: 4px;
            }
            .nav-mobile-collapse .nav-links li {
                width: 100%;
            }
            .nav-mobile-collapse .nav-links li a {
                display: block;
                width: 100%;
                padding: 10px 16px;
            }
            .card-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .category-banner h1 {
                font-size: 26px;
            }
            .category-banner .banner-desc {
                font-size: 15px;
            }
            .filter-toolbar {
                padding: 14px 16px;
                gap: 12px;
            }
            .heat-indicator-bar {
                padding: 20px 18px;
            }
            .heat-row {
                gap: 10px;
                flex-wrap: wrap;
            }
            .heat-row .heat-bar-track {
                min-width: 100px;
                flex: 1;
            }
            .heat-row .heat-value {
                min-width: 55px;
                font-size: 16px;
            }
            .topic-list-card {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
            }
            .topic-list-card .topic-thumb {
                width: 100%;
                height: 160px;
            }
            .cta-card-category {
                padding: 28px 24px;
                flex-direction: column;
                align-items: flex-start;
            }
            .cta-card-category .cta-form {
                width: 100%;
                min-width: auto;
                max-width: 100%;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
                gap: 6px;
            }
        }
        @media (max-width: 520px) {
            .container-custom {
                padding-left: 16px;
                padding-right: 16px;
            }
            .section-custom {
                padding: 32px 0;
            }
            .card-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }
            .category-banner {
                padding: 28px 0 24px;
            }
            .category-banner h1 {
                font-size: 22px;
            }
            .category-banner .banner-search input {
                padding: 12px 16px 12px 40px;
                font-size: 14px;
            }
            .filter-toolbar {
                flex-direction: column;
                align-items: flex-start;
            }
            .filter-pills {
                width: 100%;
            }
            .heat-indicator-bar {
                padding: 16px 14px;
            }
            .heat-row .heat-info .heat-name {
                font-size: 14px;
            }
            .heat-row .heat-value {
                font-size: 15px;
                min-width: 48px;
            }
            .faq-accordion-custom .accordion-button {
                padding: 16px 18px;
                font-size: 15px;
            }
            .faq-accordion-custom .accordion-body {
                padding: 14px 18px 18px;
                font-size: 14px;
            }
            .cta-card-category {
                padding: 24px 18px;
            }
            .cta-card-category .cta-form input {
                min-width: 100%;
            }
            .cta-card-category .cta-form .btn-accent {
                width: 100%;
            }
        }

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