/* roulang page: index */
:root {
            --brand-blue: #4A78B4;
            --brand-blue-dark: #2E4F7E;
            --brand-blue-light: #E9F0F8;
            --brand-gold: #D9A05B;
            --brand-gold-light: #F5EDE0;
            --bg-main: #F7F9FC;
            --text-main: #1A1A1A;
            --text-secondary: #5C5C5C;
            --text-muted: #888888;
            --border-light: #E6EDF5;
            --card-shadow: 0 4px 16px rgba(74, 120, 180, 0.08);
            --card-shadow-hover: 0 8px 24px rgba(74, 120, 180, 0.14);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-pill: 50px;
            --font-stack: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            --section-pad-y: 80px;
            --section-pad-y-mobile: 48px;
            --transition-base: 0.25s ease;
        }

        * {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-stack);
            background-color: var(--bg-main);
            color: var(--text-main);
            font-size: 16px;
            line-height: 1.7;
            margin: 0;
            padding: 0;
            overflow-x: hidden;
        }

        a {
            color: var(--brand-blue);
            text-decoration: none;
            transition: color var(--transition-base);
        }
        a:hover {
            color: var(--brand-blue-dark);
            text-decoration: none;
        }
        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--brand-blue);
            outline-offset: 3px;
            border-radius: 4px;
        }

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

        h1, h2, h3, h4, h5, h6 {
            font-family: var(--font-stack);
            color: var(--text-main);
            margin-top: 0;
        }

        h1 {
            font-size: clamp(28px, 4vw, 38px);
            font-weight: 700;
            line-height: 1.35;
            color: var(--text-main);
            letter-spacing: -0.01em;
        }

        h2 {
            font-size: clamp(22px, 3vw, 28px);
            font-weight: 600;
            line-height: 1.4;
            margin-bottom: 12px;
        }

        h3 {
            font-size: clamp(17px, 2vw, 20px);
            font-weight: 600;
            line-height: 1.5;
        }

        p {
            margin-bottom: 0;
            color: var(--text-secondary);
        }

        .container-custom {
            max-width: 1140px;
            margin: 0 auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        .container {
            max-width: 1140px;
        }

        section {
            padding-top: var(--section-pad-y);
            padding-bottom: var(--section-pad-y);
        }

        /* ==================== Header / Nav ==================== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1050;
            background: #FFFFFF;
            box-shadow: 0 2px 12px rgba(42, 67, 101, 0.06);
            border-bottom: 1px solid var(--border-light);
        }

        .navbar-custom {
            padding: 0;
            background: transparent;
        }

        .navbar-custom .navbar-brand {
            font-family: var(--font-stack);
            font-weight: 700;
            font-size: 18px;
            color: var(--brand-blue-dark);
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 14px 0;
            white-space: nowrap;
        }

        .navbar-custom .navbar-brand .brand-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 34px;
            height: 34px;
            background: var(--brand-blue);
            color: #fff;
            border-radius: var(--radius-sm);
            font-size: 16px;
            font-weight: 700;
            flex-shrink: 0;
        }

        .navbar-custom .navbar-brand:hover {
            color: var(--brand-blue-dark);
        }

        .navbar-custom .nav-link {
            font-family: var(--font-stack);
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 20px 14px !important;
            position: relative;
            transition: color var(--transition-base);
        }

        .navbar-custom .nav-link:hover,
        .navbar-custom .nav-link:focus {
            color: var(--brand-blue);
        }

        .navbar-custom .nav-link.active {
            color: var(--brand-blue);
        }

        .navbar-custom .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 8px;
            left: 14px;
            right: 14px;
            height: 2px;
            background: var(--brand-blue);
            border-radius: 2px;
        }

        .navbar-toggler {
            border: 1px solid var(--border-light);
            border-radius: var(--radius-sm);
            padding: 8px 10px;
            background: #fff;
        }

        .navbar-toggler:focus {
            box-shadow: 0 0 0 3px rgba(74, 120, 180, 0.2);
            border-color: var(--brand-blue);
        }

        .navbar-toggler-icon {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='%232E4F7E' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
        }

        .nav-cta-link {
            display: inline-block;
            background: var(--brand-blue);
            color: #fff !important;
            padding: 8px 18px !important;
            border-radius: var(--radius-sm);
            font-weight: 500;
            font-size: 14px;
            transition: background var(--transition-base);
        }
        .nav-cta-link:hover {
            background: var(--brand-blue-dark);
            color: #fff !important;
        }

        /* ==================== Hero ==================== */
        .hero-section {
            background: linear-gradient(135deg, #FFFFFF 0%, var(--brand-blue-light) 100%);
            padding-top: 56px;
            padding-bottom: 40px;
            position: relative;
            overflow: hidden;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            top: -120px;
            right: -120px;
            width: 420px;
            height: 420px;
            background: radial-gradient(circle, rgba(74, 120, 180, 0.07) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .hero-content {
            position: relative;
            z-index: 1;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: #fff;
            border: 1px solid var(--border-light);
            color: var(--brand-blue-dark);
            font-size: 13px;
            font-weight: 500;
            padding: 6px 14px;
            border-radius: var(--radius-pill);
            margin-bottom: 18px;
            box-shadow: 0 2px 8px rgba(74, 120, 180, 0.06);
        }
        .hero-badge .dot {
            width: 8px;
            height: 8px;
            background: var(--brand-gold);
            border-radius: 50%;
            display: inline-block;
        }

        .hero-subtitle {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.8;
            max-width: 560px;
            margin-bottom: 24px;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-bottom: 22px;
        }

        .hero-stats-mini {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            padding-top: 14px;
            border-top: 1px solid var(--border-light);
        }
        .hero-stat-item {
            display: flex;
            align-items: baseline;
            gap: 6px;
            font-size: 13px;
            color: var(--text-muted);
        }
        .hero-stat-item strong {
            font-size: 20px;
            font-weight: 700;
            color: var(--brand-blue-dark);
        }

        .hero-image-wrapper {
            position: relative;
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: 0 12px 32px rgba(42, 67, 101, 0.14);
            border: 1px solid rgba(255, 255, 255, 0.6);
        }
        .hero-image-wrapper img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .hero-region-tags {
            position: absolute;
            bottom: 16px;
            left: 16px;
            right: 16px;
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
        }
        .region-tag {
            display: inline-block;
            background: rgba(255, 255, 255, 0.92);
            color: var(--text-main);
            font-size: 12px;
            padding: 4px 10px;
            border-radius: var(--radius-pill);
            font-weight: 500;
            backdrop-filter: blur(6px);
        }

        /* ==================== Chips Strip ==================== */
        .chips-strip {
            background: #fff;
            border-bottom: 1px solid var(--border-light);
            padding: 12px 0;
        }
        .chips-strip .chip {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 12px;
            font-weight: 500;
            padding: 5px 12px;
            border-radius: var(--radius-pill);
            white-space: nowrap;
            transition: all var(--transition-base);
        }
        .chip .chip-dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            flex-shrink: 0;
        }
        .chip-warmup {
            background: var(--brand-blue-light);
            color: var(--brand-blue-dark);
        }
        .chip-warmup .chip-dot {
            background: var(--brand-gold);
        }
        .chip-live {
            background: var(--brand-blue);
            color: #fff;
        }
        .chip-live .chip-dot {
            background: #fff;
            animation: pulse-dot 1.6s infinite;
        }
        .chip-replay {
            background: var(--brand-gold-light);
            color: #8B6B3D;
        }
        .chip-replay .chip-dot {
            background: var(--brand-gold);
        }

        @keyframes pulse-dot {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.4; }
        }

        .chips-scroll {
            display: flex;
            gap: 8px;
            overflow-x: auto;
            scroll-snap-type: x proximity;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: none;
        }
        .chips-scroll::-webkit-scrollbar {
            display: none;
        }

        /* ==================== Buttons ==================== */
        .btn-brand {
            background: var(--brand-blue);
            color: #fff;
            border: none;
            border-radius: var(--radius-sm);
            padding: 10px 22px;
            font-size: 15px;
            font-weight: 500;
            font-family: var(--font-stack);
            transition: background var(--transition-base), transform var(--transition-base);
            display: inline-block;
            text-align: center;
        }
        .btn-brand:hover {
            background: var(--brand-blue-dark);
            color: #fff;
            transform: translateY(-1px);
        }
        .btn-brand:active {
            transform: translateY(0);
        }

        .btn-outline-brand {
            background: #fff;
            color: var(--brand-blue);
            border: 1px solid var(--brand-blue);
            border-radius: var(--radius-sm);
            padding: 10px 22px;
            font-size: 15px;
            font-weight: 500;
            font-family: var(--font-stack);
            transition: background var(--transition-base), color var(--transition-base);
            display: inline-block;
            text-align: center;
        }
        .btn-outline-brand:hover {
            background: var(--brand-blue-light);
            color: var(--brand-blue-dark);
            border-color: var(--brand-blue-dark);
        }

        .btn-gold {
            background: var(--brand-gold);
            color: #fff;
            border: none;
            border-radius: var(--radius-sm);
            padding: 10px 22px;
            font-size: 15px;
            font-weight: 500;
            font-family: var(--font-stack);
            transition: background var(--transition-base), transform var(--transition-base);
            display: inline-block;
            text-align: center;
        }
        .btn-gold:hover {
            background: #C58A3E;
            color: #fff;
            transform: translateY(-1px);
        }

        /* ==================== Cards General ==================== */
        .card-custom {
            background: #fff;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            box-shadow: var(--card-shadow);
            transition: box-shadow var(--transition-base), transform var(--transition-base);
            height: 100%;
        }
        .card-custom:hover {
            box-shadow: var(--card-shadow-hover);
            transform: translateY(-4px);
        }

        .card-img-top-custom {
            border-radius: var(--radius-md) var(--radius-md) 0 0;
            overflow: hidden;
        }
        .card-img-top-custom img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .card-custom:hover .card-img-top-custom img {
            transform: scale(1.03);
        }

        .card-body-custom {
            padding: 20px 20px 22px;
        }

        .card-title-custom {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 8px;
        }

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

        .card-link-custom {
            font-size: 14px;
            font-weight: 500;
            color: var(--brand-blue);
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: color var(--transition-base);
        }
        .card-link-custom:hover {
            color: var(--brand-blue-dark);
        }

        /* ==================== Metrics Board ==================== */
        .metrics-section {
            background: #fff;
            border-bottom: 1px solid var(--border-light);
        }
        .metric-card {
            background: #fff;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 22px 20px;
            text-align: center;
            box-shadow: 0 2px 10px rgba(74, 120, 180, 0.05);
            transition: box-shadow var(--transition-base), transform var(--transition-base);
            height: 100%;
        }
        .metric-card:hover {
            box-shadow: var(--card-shadow-hover);
            transform: translateY(-3px);
        }
        .metric-icon {
            font-size: 28px;
            color: var(--brand-blue);
            margin-bottom: 10px;
        }
        .metric-value {
            font-size: 38px;
            font-weight: 700;
            color: var(--brand-blue-dark);
            line-height: 1.2;
            margin-bottom: 4px;
        }
        .metric-label {
            font-size: 14px;
            color: var(--text-secondary);
            font-weight: 500;
        }
        .metric-note {
            font-size: 12px;
            color: var(--text-muted);
            margin-top: 4px;
        }

        /* ==================== Section Headers ==================== */
        .section-header {
            text-align: left;
            margin-bottom: 32px;
        }
        .section-header .section-label {
            display: inline-block;
            font-size: 13px;
            font-weight: 500;
            color: var(--brand-blue);
            background: var(--brand-blue-light);
            padding: 4px 12px;
            border-radius: var(--radius-pill);
            margin-bottom: 8px;
        }
        .section-header h2 {
            margin-bottom: 8px;
        }
        .section-header .section-desc {
            font-size: 15px;
            color: var(--text-secondary);
            max-width: 680px;
            line-height: 1.8;
        }

        /* ==================== Comparison ==================== */
        .comparison-card {
            background: #fff;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            box-shadow: var(--card-shadow);
            padding: 28px 24px;
            height: 100%;
        }
        .comparison-card.highlight {
            border-left: 4px solid var(--brand-blue);
            background: linear-gradient(135deg, #FFFFFF 0%, var(--brand-blue-light) 100%);
        }
        .comparison-card .comp-title {
            font-size: 20px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .comparison-row {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 8px 0;
            border-bottom: 1px solid #F0F4FA;
            font-size: 14px;
        }
        .comparison-row:last-child {
            border-bottom: none;
        }
        .comparison-row .row-label {
            color: var(--text-secondary);
            font-weight: 500;
        }
        .comparison-row .row-value {
            color: var(--text-main);
            font-weight: 500;
        }
        .comparison-row .row-value.win {
            color: var(--brand-blue-dark);
            font-weight: 600;
        }
        .comparison-row .row-value.neutral {
            color: var(--text-muted);
        }

        /* ==================== Timeline ==================== */
        .timeline-list {
            position: relative;
            padding-left: 30px;
        }
        .timeline-list::before {
            content: '';
            position: absolute;
            left: 10px;
            top: 4px;
            bottom: 4px;
            width: 2px;
            background: var(--border-light);
            border-radius: 2px;
        }
        .timeline-item {
            position: relative;
            padding-bottom: 28px;
        }
        .timeline-item:last-child {
            padding-bottom: 0;
        }
        .timeline-item::before {
            content: '';
            position: absolute;
            left: -25px;
            top: 6px;
            width: 10px;
            height: 10px;
            background: var(--brand-blue);
            border-radius: 50%;
            box-shadow: 0 0 0 3px rgba(74, 120, 180, 0.18);
        }
        .timeline-item .tl-date {
            font-size: 13px;
            color: var(--brand-gold);
            font-weight: 600;
            margin-bottom: 2px;
        }
        .timeline-item .tl-title {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 4px;
        }
        .timeline-item .tl-desc {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* ==================== News List ==================== */
        .news-card {
            background: #fff;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            box-shadow: var(--card-shadow);
            overflow: hidden;
            transition: box-shadow var(--transition-base), transform var(--transition-base);
            height: 100%;
        }
        .news-card:hover {
            box-shadow: var(--card-shadow-hover);
            transform: translateY(-4px);
        }
        .news-card .news-img {
            height: 170px;
            overflow: hidden;
            border-radius: 0;
        }
        .news-card .news-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .news-card:hover .news-img img {
            transform: scale(1.03);
        }
        .news-card .news-body {
            padding: 18px 18px 20px;
        }
        .news-meta {
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 10px;
            flex-wrap: wrap;
        }
        .news-date {
            font-size: 12px;
            color: var(--text-muted);
        }
        .news-tag {
            font-size: 12px;
            font-weight: 500;
            padding: 3px 10px;
            border-radius: var(--radius-pill);
            background: var(--brand-blue-light);
            color: var(--brand-blue-dark);
        }
        .news-title {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 6px;
            line-height: 1.5;
        }
        .news-excerpt {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* ==================== Trust/Guarantee ==================== */
        .guarantee-item {
            display: flex;
            align-items: flex-start;
            gap: 14px;
            background: #fff;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            box-shadow: var(--card-shadow);
            padding: 20px 18px;
            height: 100%;
            transition: box-shadow var(--transition-base);
        }
        .guarantee-item:hover {
            box-shadow: var(--card-shadow-hover);
        }
        .guarantee-icon {
            font-size: 24px;
            color: var(--brand-blue);
            flex-shrink: 0;
            margin-top: 2px;
            width: 32px;
            text-align: center;
        }
        .guarantee-title {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 4px;
        }
        .guarantee-desc {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* ==================== Quick FAQ ==================== */
        .quick-card {
            background: #fff;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            box-shadow: var(--card-shadow);
            padding: 18px 20px;
            display: flex;
            flex-direction: column;
            height: 100%;
            transition: box-shadow var(--transition-base), transform var(--transition-base);
        }
        .quick-card:hover {
            box-shadow: var(--card-shadow-hover);
            transform: translateY(-3px);
        }
        .quick-card .qc-question {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 8px;
            line-height: 1.5;
        }
        .quick-card .qc-link {
            margin-top: auto;
            font-size: 14px;
            font-weight: 500;
            color: var(--brand-blue);
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }
        .quick-card .qc-link:hover {
            color: var(--brand-blue-dark);
        }

        /* ==================== FAQ Accordion ==================== */
        .accordion-custom .accordion-item {
            background: #fff;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-sm) !important;
            margin-bottom: 10px;
            overflow: hidden;
            box-shadow: 0 2px 8px rgba(74, 120, 180, 0.04);
            transition: box-shadow var(--transition-base);
        }
        .accordion-custom .accordion-item:hover {
            box-shadow: var(--card-shadow);
        }
        .accordion-custom .accordion-button {
            background: #fff;
            color: var(--text-main);
            font-weight: 600;
            font-size: 15px;
            font-family: var(--font-stack);
            padding: 18px 20px;
            border: none;
            box-shadow: none !important;
            transition: color var(--transition-base);
        }
        .accordion-custom .accordion-button:not(.collapsed) {
            background: var(--brand-blue-light);
            color: var(--brand-blue-dark);
        }
        .accordion-custom .accordion-button::after {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%232E4F7E'%3e%3cpath fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3e%3c/svg%3e");
        }
        .accordion-custom .accordion-body {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
            padding: 16px 20px 20px;
        }

        /* ==================== Form ==================== */
        .form-section {
            background: #fff;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            box-shadow: var(--card-shadow);
            padding: 32px 28px;
        }
        .form-section .form-label {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-main);
            margin-bottom: 6px;
        }
        .form-section .form-control,
        .form-section .form-select {
            border: 1px solid var(--border-light);
            border-radius: var(--radius-sm);
            padding: 10px 14px;
            font-size: 14px;
            font-family: var(--font-stack);
            color: var(--text-main);
            transition: border-color var(--transition-base), box-shadow var(--transition-base);
            background: #fff;
        }
        .form-section .form-control:focus,
        .form-section .form-select:focus {
            border-color: var(--brand-blue);
            box-shadow: 0 0 0 3px rgba(74, 120, 180, 0.12);
            outline: none;
        }
        .form-section .form-control::placeholder {
            color: var(--text-muted);
        }
        .form-section textarea.form-control {
            min-height: 110px;
            resize: vertical;
        }
        .form-hint {
            font-size: 12px;
            color: var(--text-muted);
            margin-top: 10px;
        }

        /* ==================== Scenario Cards ==================== */
        .scenario-card {
            background: #fff;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            box-shadow: var(--card-shadow);
            overflow: hidden;
            transition: box-shadow var(--transition-base), transform var(--transition-base);
            height: 100%;
        }
        .scenario-card:hover {
            box-shadow: var(--card-shadow-hover);
            transform: translateY(-4px);
        }
        .scenario-card .sc-img {
            height: 200px;
            overflow: hidden;
        }
        .scenario-card .sc-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .scenario-card:hover .sc-img img {
            transform: scale(1.03);
        }
        .scenario-card .sc-body {
            padding: 20px;
        }
        .scenario-card .sc-title {
            font-size: 17px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 8px;
        }
        .scenario-card .sc-desc {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* ==================== Reviews ==================== */
        .review-card {
            background: #fff;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            box-shadow: var(--card-shadow);
            padding: 20px;
            height: 100%;
            display: flex;
            flex-direction: column;
            transition: box-shadow var(--transition-base);
        }
        .review-card:hover {
            box-shadow: var(--card-shadow-hover);
        }
        .review-stars {
            margin-bottom: 10px;
            font-size: 16px;
            letter-spacing: 2px;
        }
        .review-stars .star-filled {
            color: var(--brand-gold);
        }
        .review-stars .star-empty {
            color: #DDD;
        }
        .review-text {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 12px;
            flex-grow: 1;
        }
        .review-author {
            font-size: 13px;
            color: var(--text-muted);
            font-weight: 500;
        }

        /* ==================== Hot List / Tags ==================== */
        .hot-list-item {
            display: flex;
            align-items: center;
            justify-content: space-between;
            background: #fff;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-light);
            padding: 12px 16px;
            margin-bottom: 8px;
            transition: box-shadow var(--transition-base), border-color var(--transition-base);
        }
        .hot-list-item:hover {
            box-shadow: var(--card-shadow);
            border-color: var(--brand-blue-light);
        }
        .hot-list-title {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-main);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .hot-list-title .hot-rank {
            font-weight: 700;
            color: var(--brand-blue-dark);
            font-size: 15px;
            width: 24px;
            text-align: center;
            flex-shrink: 0;
        }
        .hot-badge {
            font-size: 11px;
            font-weight: 500;
            background: var(--brand-gold-light);
            color: #8B6B3D;
            padding: 2px 8px;
            border-radius: var(--radius-pill);
            flex-shrink: 0;
        }

        /* ==================== Footer ==================== */
        .site-footer {
            background: #FFFFFF;
            border-top: 1px solid var(--border-light);
            padding: 40px 0 20px;
            margin-top: 0;
        }
        .site-footer .footer-brand {
            font-size: 18px;
            font-weight: 700;
            color: var(--brand-blue-dark);
            margin-bottom: 10px;
        }
        .site-footer .footer-desc {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.8;
            max-width: 500px;
            margin-bottom: 14px;
        }
        .site-footer .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .site-footer .footer-links li {
            margin-bottom: 8px;
        }
        .site-footer .footer-links a {
            font-size: 13px;
            color: var(--text-secondary);
            transition: color var(--transition-base);
        }
        .site-footer .footer-links a:hover {
            color: var(--brand-blue);
        }
        .site-footer .footer-bottom {
            border-top: 1px solid var(--border-light);
            padding-top: 16px;
            margin-top: 24px;
            font-size: 12px;
            color: var(--text-muted);
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 8px;
        }

        /* ==================== Responsive ==================== */
        @media (max-width: 991px) {
            section {
                padding-top: var(--section-pad-y-mobile);
                padding-bottom: var(--section-pad-y-mobile);
            }
            .navbar-custom .nav-link {
                padding: 12px 8px !important;
                font-size: 14px;
            }
            .navbar-custom .nav-link.active::after {
                bottom: 4px;
                left: 8px;
                right: 8px;
            }
            .hero-section {
                padding-top: 36px;
                padding-bottom: 28px;
            }
            .hero-image-wrapper {
                margin-top: 24px;
                max-height: 320px;
            }
        }

        @media (max-width: 767px) {
            .navbar-custom .navbar-brand {
                font-size: 15px;
                padding: 12px 0;
            }
            .navbar-custom .navbar-brand .brand-mark {
                width: 28px;
                height: 28px;
                font-size: 13px;
            }
            .navbar-custom .nav-link {
                padding: 10px 4px !important;
                font-size: 13px;
            }
            .nav-cta-link {
                padding: 6px 14px !important;
                font-size: 12px;
            }
            section {
                padding-top: 40px;
                padding-bottom: 40px;
            }
            .hero-section {
                padding-top: 24px;
                padding-bottom: 20px;
            }
            .hero-badge {
                font-size: 12px;
                padding: 5px 12px;
                margin-bottom: 12px;
            }
            .hero-subtitle {
                font-size: 14px;
                line-height: 1.7;
                margin-bottom: 16px;
            }
            .hero-actions {
                gap: 8px;
            }
            .hero-actions .btn-brand,
            .hero-actions .btn-outline-brand {
                width: 100%;
                font-size: 14px;
                padding: 9px 16px;
            }
            .hero-stats-mini {
                gap: 12px;
            }
            .metric-card {
                padding: 16px 12px;
            }
            .metric-value {
                font-size: 28px;
            }
            .comparison-card {
                padding: 20px 16px;
            }
            .form-section {
                padding: 20px 16px;
            }
            .site-footer .footer-bottom {
                flex-direction: column;
                gap: 4px;
                text-align: center;
            }
            .chips-scroll {
                gap: 6px;
            }
            .chips-strip .chip {
                font-size: 11px;
                padding: 4px 10px;
            }
        }

        @media (max-width: 520px) {
            .navbar-custom .navbar-brand {
                font-size: 13px;
                gap: 5px;
            }
            .navbar-custom .navbar-brand .brand-mark {
                width: 24px;
                height: 24px;
                font-size: 11px;
            }
            .navbar-custom .nav-link {
                padding: 8px 2px !important;
                font-size: 12px;
            }
            .hero-section {
                padding-top: 16px;
            }
            h1 {
                font-size: 24px;
                line-height: 1.4;
            }
            h2 {
                font-size: 20px;
            }
            .hero-image-wrapper {
                max-height: 240px;
            }
            .metric-card {
                padding: 14px 10px;
            }
            .metric-value {
                font-size: 24px;
            }
            .metric-label {
                font-size: 12px;
            }
            .section-header .section-desc {
                font-size: 13px;
            }
            .comparison-card .comp-title {
                font-size: 17px;
            }
            .comparison-row {
                font-size: 13px;
                gap: 8px;
            }
            .news-card .news-img {
                height: 140px;
            }
            .news-card .news-body {
                padding: 14px;
            }
            .news-title {
                font-size: 14px;
            }
            .guarantee-item {
                padding: 14px 12px;
                gap: 10px;
            }
            .guarantee-icon {
                font-size: 20px;
                width: 24px;
            }
            .guarantee-title {
                font-size: 14px;
            }
            .guarantee-desc {
                font-size: 12px;
            }
            .quick-card {
                padding: 14px 16px;
            }
            .quick-card .qc-question {
                font-size: 13px;
            }
            .accordion-custom .accordion-button {
                font-size: 13px;
                padding: 14px 16px;
            }
            .accordion-custom .accordion-body {
                font-size: 13px;
                padding: 12px 16px 16px;
            }
            .scenario-card .sc-img {
                height: 150px;
            }
            .scenario-card .sc-body {
                padding: 14px;
            }
            .scenario-card .sc-title {
                font-size: 15px;
            }
            .scenario-card .sc-desc {
                font-size: 13px;
            }
            .review-card {
                padding: 14px;
            }
            .review-text {
                font-size: 13px;
            }
            .hot-list-item {
                padding: 10px 12px;
            }
            .hot-list-title {
                font-size: 13px;
            }
        }

/* 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}