/* roulang page: index */
:root {
            --color-primary: #1464e6;
            --color-primary-light: rgba(20, 100, 230, 0.08);
            --color-primary-border: rgba(20, 100, 230, 0.25);
            --color-secondary: #ff7a1a;
            --color-secondary-dark: #e66800;
            --color-bg: #f7f9fc;
            --color-surface: #ffffff;
            --color-text: #1a2333;
            --color-text-secondary: #5b6b7c;
            --color-border: #e4e9f0;
            --color-dark: #101826;
            --color-dark-light: #1b2a3a;
            --radius-card: 12px;
            --radius-btn: 8px;
            --radius-badge: 999px;
            --shadow-card: 0 8px 30px rgba(20, 40, 80, 0.08);
            --shadow-hover: 0 14px 40px rgba(20, 40, 80, 0.12);
            --container-width: 1200px;
            --font-family: system-ui, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            --transition-base: all 0.3s ease;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-family);
            background: var(--color-bg);
            color: var(--color-text);
            line-height: 1.8;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }

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

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

        ul,
        ol {
            list-style: none;
        }

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

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

        @media (max-width: 640px) {
            .container {
                padding: 0 16px;
            }
        }

        .section {
            padding: 96px 0;
        }

        .section-lg {
            padding: 110px 0;
        }

        .section-sm {
            padding: 64px 0;
        }

        .section-bg-white {
            background: var(--color-surface);
        }

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

        .section-header {
            text-align: center;
            max-width: 720px;
            margin: 0 auto 56px;
        }

        .section-header .section-tag {
            display: inline-block;
            background: var(--color-primary-light);
            color: var(--color-primary);
            font-size: 13px;
            font-weight: 600;
            padding: 6px 18px;
            border-radius: var(--radius-badge);
            margin-bottom: 16px;
            letter-spacing: 1px;
        }

        .section-header h2 {
            font-size: 32px;
            font-weight: 800;
            line-height: 1.4;
            color: var(--color-text);
            margin-bottom: 14px;
        }

        .section-header p {
            color: var(--color-text-secondary);
            font-size: 16px;
            line-height: 1.8;
        }

        .section-header.left-align {
            text-align: left;
            margin-left: 0;
            margin-right: 0;
        }

        /* ---------- Buttons ---------- */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-weight: 600;
            font-size: 15px;
            line-height: 1;
            padding: 14px 30px;
            border-radius: var(--radius-btn);
            border: 2px solid transparent;
            cursor: pointer;
            transition: var(--transition-base);
            text-align: center;
            min-height: 46px;
        }

        .btn-primary {
            background: var(--color-secondary);
            color: #fff;
            border-color: var(--color-secondary);
        }

        .btn-primary:hover {
            background: var(--color-secondary-dark);
            border-color: var(--color-secondary-dark);
            transform: translateY(-2px);
            box-shadow: 0 10px 24px rgba(255, 122, 26, 0.3);
        }

        .btn-primary:active {
            transform: translateY(1px);
            box-shadow: none;
        }

        .btn-outline {
            background: transparent;
            color: var(--color-primary);
            border-color: var(--color-primary);
        }

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

        .btn-outline:active {
            transform: translateY(1px);
        }

        .btn-white {
            background: #fff;
            color: var(--color-text);
            border-color: #fff;
        }

        .btn-white:hover {
            background: rgba(255, 255, 255, 0.9);
            transform: translateY(-2px);
        }

        .btn-sm {
            padding: 9px 20px;
            font-size: 14px;
            min-height: 40px;
        }

        .btn:focus-visible,
        .btn-outline:focus-visible {
            outline: 3px solid rgba(20, 100, 230, 0.35);
            outline-offset: 2px;
        }

        .btn-primary:focus-visible {
            outline: 3px solid rgba(255, 122, 26, 0.4);
            outline-offset: 2px;
        }

        /* ---------- Header / Nav ---------- */
        .site-header {
            position: relative;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--color-border);
            box-shadow: 0 2px 20px rgba(20, 40, 80, 0.04);
        }

        .header-top {
            border-bottom: 1px solid rgba(228, 233, 240, 0.7);
        }

        .header-brand-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 0;
            gap: 20px;
        }

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

        .brand-icon {
            width: 42px;
            height: 42px;
            background: linear-gradient(135deg, var(--color-primary) 0%, #4d94ff 100%);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 900;
            font-size: 22px;
            line-height: 1;
            box-shadow: 0 4px 12px rgba(20, 100, 230, 0.25);
        }

        .brand-text {
            font-size: 22px;
            font-weight: 800;
            color: var(--color-text);
            letter-spacing: 0.5px;
            white-space: nowrap;
        }

        .brand-text span {
            color: var(--color-primary);
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 20px;
        }

        .header-phone {
            display: flex;
            align-items: center;
            gap: 8px;
            color: var(--color-text-secondary);
            font-size: 14px;
            font-weight: 500;
        }

        .header-phone i {
            color: var(--color-primary);
            font-size: 16px;
        }

        .menu-toggle {
            display: none;
            width: 44px;
            height: 44px;
            align-items: center;
            justify-content: center;
            background: transparent;
            border: 1px solid var(--color-border);
            border-radius: 8px;
            color: var(--color-text);
            font-size: 20px;
            cursor: pointer;
            transition: var(--transition-base);
        }

        .menu-toggle:hover {
            background: var(--color-primary-light);
            border-color: var(--color-primary);
            color: var(--color-primary);
        }

        .header-nav {
            background: transparent;
        }

        .channel-nav {
            display: flex;
            align-items: center;
            gap: 4px;
            padding: 6px 0;
            flex-wrap: wrap;
        }

        .nav-link {
            display: inline-flex;
            align-items: center;
            padding: 10px 20px;
            color: var(--color-text-secondary);
            font-weight: 600;
            font-size: 15px;
            border-radius: 8px;
            transition: var(--transition-base);
            border: 1px solid transparent;
            min-height: 44px;
        }

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

        .nav-link.active {
            color: var(--color-primary);
            background: var(--color-primary-light);
            position: relative;
        }

        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 4px;
            left: 20px;
            right: 20px;
            height: 2px;
            background: var(--color-primary);
            border-radius: 2px;
        }

        @media (max-width: 768px) {
            .header-actions .header-phone {
                display: none;
            }
            .menu-toggle {
                display: flex;
            }
            .header-nav {
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: #fff;
                border-bottom: 1px solid var(--color-border);
                box-shadow: 0 10px 30px rgba(20, 40, 80, 0.08);
                max-height: 0;
                overflow: hidden;
                transition: max-height 0.35s ease;
            }
            .header-nav.open {
                max-height: 320px;
            }
            .channel-nav {
                flex-direction: column;
                align-items: stretch;
                padding: 12px 20px;
                gap: 4px;
            }
            .nav-link {
                border-radius: 8px;
            }
            .nav-link.active::after {
                display: none;
            }
            .nav-link.active {
                background: var(--color-primary-light);
            }
        }

        /* ---------- Hero ---------- */
        .hero {
            position: relative;
            padding: 80px 0 100px;
            background: linear-gradient(135deg, rgba(247, 249, 252, 0.95) 0%, rgba(255, 255, 255, 0.9) 40%, rgba(20, 100, 230, 0.06) 100%);
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 700px;
            height: 700px;
            background: radial-gradient(circle, rgba(20, 100, 230, 0.08) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .hero-grid {
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 60px;
            align-items: center;
            position: relative;
            z-index: 2;
        }

        .hero-content {
            position: relative;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 122, 26, 0.1);
            border: 1px solid rgba(255, 122, 26, 0.25);
            color: var(--color-secondary);
            font-size: 13px;
            font-weight: 600;
            padding: 7px 18px;
            border-radius: var(--radius-badge);
            margin-bottom: 22px;
            letter-spacing: 0.5px;
        }

        .hero-badge i {
            font-size: 14px;
        }

        .hero-title {
            font-size: 42px;
            font-weight: 900;
            line-height: 1.3;
            color: var(--color-text);
            margin-bottom: 18px;
            letter-spacing: -0.5px;
        }

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

        .hero-title .highlight::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 0;
            right: 0;
            height: 8px;
            background: rgba(20, 100, 230, 0.15);
            border-radius: 4px;
            z-index: -1;
        }

        .hero-subtitle {
            font-size: 16px;
            line-height: 1.9;
            color: var(--color-text-secondary);
            margin-bottom: 30px;
            max-width: 460px;
        }

        .hero-actions {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
            margin-bottom: 36px;
        }

        .hero-trust {
            display: flex;
            align-items: center;
            gap: 24px;
            flex-wrap: wrap;
        }

        .hero-trust span {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--color-text-secondary);
        }

        .hero-trust strong {
            font-size: 18px;
            font-weight: 800;
            color: var(--color-text);
        }

        .hero-image {
            position: relative;
            border-radius: 16px;
            overflow: hidden;
            box-shadow: 0 20px 60px rgba(20, 40, 80, 0.15);
            aspect-ratio: 4/3;
            background: var(--color-surface);
        }

        .hero-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.6s ease;
        }

        .hero-image:hover img {
            transform: scale(1.03);
        }

        .hero-image::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(20, 40, 80, 0.12) 0%, transparent 50%);
            pointer-events: none;
        }

        .hero-image-badge {
            position: absolute;
            bottom: 18px;
            left: 18px;
            z-index: 2;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(4px);
            border-radius: 10px;
            padding: 10px 16px;
            font-size: 13px;
            font-weight: 600;
            color: var(--color-text);
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .hero-image-badge i {
            color: var(--color-secondary);
        }

        @media (max-width: 1024px) {
            .hero-grid {
                gap: 40px;
            }
            .hero-title {
                font-size: 36px;
            }
        }

        @media (max-width: 768px) {
            .hero {
                padding: 50px 0 60px;
            }
            .hero-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .hero-content {
                text-align: left;
            }
            .hero-title {
                font-size: 32px;
            }
            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .hero-actions .btn {
                width: 100%;
            }
        }

        /* ---------- Proof Bar ---------- */
        .proof-bar {
            background: var(--color-surface);
            border-bottom: 1px solid var(--color-border);
            padding: 30px 0;
            margin-top: -1px;
        }

        .proof-stats {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 30px;
            text-align: center;
        }

        .stat-item {
            padding: 10px 0;
            position: relative;
        }

        .stat-item:not(:last-child)::after {
            content: '';
            position: absolute;
            right: -15px;
            top: 20%;
            bottom: 20%;
            width: 1px;
            background: var(--color-border);
        }

        .stat-number {
            display: block;
            font-size: 36px;
            font-weight: 900;
            line-height: 1.2;
            color: var(--color-primary);
        }

        .stat-label {
            display: block;
            font-size: 14px;
            color: var(--color-text-secondary);
            margin-top: 6px;
        }

        @media (max-width: 768px) {
            .proof-stats {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .stat-item:nth-child(2)::after {
                display: none;
            }
            .stat-number {
                font-size: 28px;
            }
        }

        @media (max-width: 520px) {
            .proof-stats {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
        }

        /* ---------- Features ---------- */
        .features {
            background: var(--color-surface);
        }

        .feature-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            margin-bottom: 80px;
            align-items: center;
        }

        .feature-row:last-child {
            margin-bottom: 0;
        }

        .feature-row.reverse .feature-image {
            order: 2;
        }

        .feature-row.reverse .feature-content {
            order: 1;
        }

        .feature-tag {
            display: inline-block;
            background: var(--color-primary-light);
            color: var(--color-primary);
            font-size: 12px;
            font-weight: 600;
            padding: 4px 14px;
            border-radius: var(--radius-badge);
            margin-bottom: 14px;
            letter-spacing: 0.5px;
        }

        .feature-title {
            font-size: 28px;
            font-weight: 800;
            line-height: 1.4;
            color: var(--color-text);
            margin-bottom: 16px;
        }

        .feature-desc {
            font-size: 15px;
            line-height: 1.8;
            color: var(--color-text-secondary);
            margin-bottom: 20px;
        }

        .feature-list {
            margin-bottom: 24px;
        }

        .feature-list li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            padding: 8px 0;
            font-size: 15px;
            color: var(--color-text-secondary);
        }

        .feature-list li i {
            color: var(--color-primary);
            font-size: 16px;
            margin-top: 3px;
            flex-shrink: 0;
        }

        .feature-image {
            border-radius: 16px;
            overflow: hidden;
            box-shadow: var(--shadow-hover);
            aspect-ratio: 4/3;
            background: var(--color-bg);
        }

        .feature-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

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

        .feature-wide {
            background: linear-gradient(135deg, var(--color-primary) 0%, #1a5ec9 100%);
            border-radius: 16px;
            padding: 48px;
            color: #fff;
            display: grid;
            grid-template-columns: 1.5fr 1fr;
            gap: 40px;
            align-items: center;
            box-shadow: 0 16px 40px rgba(20, 100, 230, 0.25);
            position: relative;
            overflow: hidden;
        }

        .feature-wide::before {
            content: '';
            position: absolute;
            top: -40px;
            right: -40px;
            width: 240px;
            height: 240px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
        }

        .feature-wide .feature-content {
            position: relative;
            z-index: 2;
        }

        .feature-wide h3 {
            font-size: 26px;
            font-weight: 800;
            margin-bottom: 14px;
            line-height: 1.4;
        }

        .feature-wide p {
            font-size: 15px;
            line-height: 1.8;
            opacity: 0.92;
            margin-bottom: 0;
        }

        .feature-wide .feature-icon {
            width: 100px;
            height: 100px;
            background: rgba(255, 255, 255, 0.15);
            border: 1px solid rgba(255, 255, 255, 0.25);
            border-radius: 24px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 36px;
            color: #fff;
            justify-self: end;
            position: relative;
            z-index: 2;
        }

        @media (max-width: 768px) {
            .feature-row,
            .feature-row.reverse {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .feature-row.reverse .feature-image {
                order: 1;
            }
            .feature-row.reverse .feature-content {
                order: 2;
            }
            .feature-title {
                font-size: 24px;
            }
            .feature-wide {
                grid-template-columns: 1fr;
                padding: 36px 24px;
            }
            .feature-wide .feature-icon {
                justify-self: start;
            }
        }

        /* ---------- Showcase ---------- */
        .showcase {
            background: var(--color-bg);
            overflow: hidden;
        }

        .showcase-scroll {
            display: flex;
            gap: 24px;
            overflow-x: auto;
            padding: 8px 4px 28px;
            scroll-snap-type: x mandatory;
            -webkit-overflow-scrolling: touch;
        }

        .showcase-scroll::-webkit-scrollbar {
            height: 6px;
        }

        .showcase-scroll::-webkit-scrollbar-track {
            background: transparent;
        }

        .showcase-scroll::-webkit-scrollbar-thumb {
            background: var(--color-border);
            border-radius: 3px;
        }

        .showcase-card {
            min-width: 340px;
            max-width: 400px;
            background: var(--color-surface);
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: var(--transition-base);
            border: 1px solid var(--color-border);
            flex: 0 0 auto;
            scroll-snap-align: start;
        }

        .showcase-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-6px);
        }

        .showcase-card-image {
            aspect-ratio: 16/10;
            overflow: hidden;
            background: var(--color-bg);
        }

        .showcase-card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .showcase-card:hover .showcase-card-image img {
            transform: scale(1.05);
        }

        .showcase-card-body {
            padding: 22px 24px 26px;
        }

        .showcase-card-title {
            font-size: 18px;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 8px;
            line-height: 1.4;
        }

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

        .showcase-card-tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            color: var(--color-secondary);
            background: rgba(255, 122, 26, 0.08);
            padding: 4px 12px;
            border-radius: var(--radius-badge);
            margin-bottom: 12px;
        }

        @media (max-width: 640px) {
            .showcase-card {
                min-width: 280px;
            }
        }

        /* ---------- Evidence ---------- */
        .evidence {
            background: var(--color-surface);
        }

        .evidence-grid {
            display: grid;
            grid-template-columns: 0.9fr 1.1fr;
            gap: 60px;
            align-items: start;
        }

        .evidence-left {
            position: sticky;
            top: 100px;
        }

        .evidence-left h2 {
            font-size: 32px;
            font-weight: 800;
            line-height: 1.4;
            margin-bottom: 16px;
            color: var(--color-text);
        }

        .evidence-left p {
            color: var(--color-text-secondary);
            font-size: 15px;
            line-height: 1.8;
            margin-bottom: 24px;
        }

        .evidence-badge-list {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }

        .evidence-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--color-bg);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-badge);
            padding: 8px 16px;
            font-size: 13px;
            font-weight: 500;
            color: var(--color-text-secondary);
        }

        .evidence-badge i {
            color: var(--color-primary);
        }

        .timeline {
            position: relative;
            padding-left: 30px;
        }

        .timeline::before {
            content: '';
            position: absolute;
            left: 8px;
            top: 8px;
            bottom: 8px;
            width: 2px;
            background: linear-gradient(to bottom, var(--color-primary) 0%, var(--color-border) 100%);
            border-radius: 2px;
        }

        .timeline-item {
            position: relative;
            padding: 20px 24px;
            background: var(--color-bg);
            border-radius: var(--radius-card);
            border: 1px solid var(--color-border);
            margin-bottom: 20px;
            transition: var(--transition-base);
        }

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

        .timeline-item:hover {
            box-shadow: var(--shadow-card);
            border-color: var(--color-primary-border);
        }

        .timeline-item::before {
            content: '';
            position: absolute;
            left: -26px;
            top: 28px;
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background: var(--color-primary);
            border: 3px solid #fff;
            box-shadow: 0 0 0 2px var(--color-primary-border);
        }

        .timeline-year {
            font-size: 13px;
            font-weight: 700;
            color: var(--color-primary);
            display: block;
            margin-bottom: 6px;
        }

        .timeline-title {
            font-size: 16px;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 6px;
        }

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

        @media (max-width: 1024px) {
            .evidence-grid {
                grid-template-columns: 1fr;
                gap: 40px;
            }
            .evidence-left {
                position: static;
            }
        }

        /* ---------- Pricing ---------- */
        .pricing {
            background: var(--color-bg);
        }

        .pricing-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
            margin-top: 20px;
        }

        .pricing-card {
            background: var(--color-surface);
            border-radius: 16px;
            border: 1px solid var(--color-border);
            padding: 36px 30px;
            position: relative;
            transition: var(--transition-base);
            box-shadow: var(--shadow-card);
            display: flex;
            flex-direction: column;
        }

        .pricing-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-6px);
        }

        .pricing-card.featured {
            border-color: var(--color-primary);
            box-shadow: 0 16px 48px rgba(20, 100, 230, 0.15);
            background: linear-gradient(170deg, #fff 0%, rgba(20, 100, 230, 0.03) 100%);
        }

        .pricing-badge {
            position: absolute;
            top: -14px;
            right: 24px;
            background: var(--color-secondary);
            color: #fff;
            font-size: 12px;
            font-weight: 700;
            padding: 5px 16px;
            border-radius: var(--radius-badge);
            box-shadow: 0 4px 12px rgba(255, 122, 26, 0.3);
            letter-spacing: 0.5px;
        }

        .pricing-name {
            font-size: 20px;
            font-weight: 800;
            color: var(--color-text);
            margin-bottom: 8px;
        }

        .pricing-desc {
            font-size: 14px;
            color: var(--color-text-secondary);
            line-height: 1.6;
            margin-bottom: 20px;
        }

        .pricing-price {
            font-size: 36px;
            font-weight: 900;
            color: var(--color-text);
            line-height: 1.2;
            margin-bottom: 22px;
        }

        .pricing-price small {
            font-size: 16px;
            font-weight: 600;
            color: var(--color-text-secondary);
        }

        .pricing-list {
            margin-bottom: 28px;
            flex: 1;
        }

        .pricing-list li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            padding: 7px 0;
            font-size: 14px;
            color: var(--color-text-secondary);
        }

        .pricing-list li i {
            color: var(--color-primary);
            font-size: 14px;
            margin-top: 4px;
        }

        .pricing-card .btn {
            width: 100%;
            justify-content: center;
        }

        @media (max-width: 1024px) {
            .pricing-grid {
                grid-template-columns: 1fr;
                gap: 24px;
                max-width: 520px;
                margin: 0 auto;
            }
        }

        /* ---------- FAQ ---------- */
        .faq {
            background: var(--color-surface);
        }

        .faq-grid {
            display: grid;
            grid-template-columns: 0.8fr 1.2fr;
            gap: 60px;
            align-items: start;
        }

        .faq-sidebar h2 {
            font-size: 32px;
            font-weight: 800;
            line-height: 1.4;
            margin-bottom: 16px;
        }

        .faq-sidebar p {
            color: var(--color-text-secondary);
            margin-bottom: 24px;
            font-size: 15px;
            line-height: 1.8;
        }

        .faq-sidebar .btn {
            margin-bottom: 16px;
        }

        .faq-sidebar-contact {
            background: var(--color-bg);
            border-radius: var(--radius-card);
            padding: 20px 24px;
            border: 1px solid var(--color-border);
            margin-top: 10px;
        }

        .faq-sidebar-contact p {
            font-size: 14px;
            color: var(--color-text-secondary);
            margin-bottom: 8px;
        }

        .faq-sidebar-contact a {
            font-weight: 700;
            color: var(--color-primary);
            font-size: 16px;
        }

        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            overflow: hidden;
            transition: var(--transition-base);
        }

        .faq-item.open {
            border-color: var(--color-primary-border);
            box-shadow: 0 4px 20px rgba(20, 100, 230, 0.08);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 24px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 600;
            color: var(--color-text);
            transition: var(--transition-base);
            border: none;
            background: none;
            width: 100%;
            text-align: left;
            min-height: 54px;
        }

        .faq-question:hover {
            color: var(--color-primary);
        }

        .faq-icon {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            border: 1px solid var(--color-border);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            color: var(--color-text-secondary);
            transition: var(--transition-base);
            flex-shrink: 0;
        }

        .faq-item.open .faq-icon {
            transform: rotate(45deg);
            background: var(--color-primary);
            border-color: var(--color-primary);
            color: #fff;
        }

        .faq-answer {
            padding: 0 24px;
            display: none;
            border-top: 1px solid var(--color-border);
        }

        .faq-item.open .faq-answer {
            display: block;
            padding: 16px 24px 20px;
        }

        .faq-answer p {
            font-size: 15px;
            line-height: 1.8;
            color: var(--color-text-secondary);
        }

        @media (max-width: 1024px) {
            .faq-grid {
                grid-template-columns: 1fr;
                gap: 40px;
            }
        }

        /* ---------- News ---------- */
        .news {
            background: var(--color-bg);
        }

        .news-grid {
            display: grid;
            grid-template-columns: 1.2fr 1fr;
            gap: 30px;
            align-items: start;
        }

        .news-featured .news-card {
            display: grid;
            grid-template-columns: 1fr 1fr;
            background: var(--color-surface);
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--color-border);
            transition: var(--transition-base);
            height: 100%;
        }

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

        .news-thumb {
            overflow: hidden;
            aspect-ratio: 16/10;
            height: 100%;
            min-height: 200px;
            position: relative;
            background: var(--color-bg);
        }

        .news-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .news-card:hover .news-thumb img {
            transform: scale(1.05);
        }

        .news-body {
            padding: 26px 28px;
            display: flex;
            flex-direction: column;
        }

        .news-category {
            display: inline-block;
            font-size: 12px;
            font-weight: 700;
            color: var(--color-secondary);
            background: rgba(255, 122, 26, 0.1);
            padding: 4px 14px;
            border-radius: var(--radius-badge);
            align-self: flex-start;
            margin-bottom: 14px;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

        .news-title {
            font-size: 22px;
            font-weight: 800;
            line-height: 1.4;
            color: var(--color-text);
            margin-bottom: 12px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-summary {
            font-size: 14px;
            line-height: 1.7;
            color: var(--color-text-secondary);
            margin-bottom: 16px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            flex: 1;
        }

        .news-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 13px;
            color: var(--color-text-secondary);
        }

        .news-date {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .news-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .news-item {
            display: flex;
            align-items: center;
            gap: 16px;
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            padding: 18px 22px;
            transition: var(--transition-base);
            min-height: 74px;
        }

        .news-item:hover {
            border-color: var(--color-primary-border);
            box-shadow: var(--shadow-card);
            transform: translateX(4px);
        }

        .news-item .news-category {
            margin-bottom: 0;
            flex-shrink: 0;
        }

        .news-item-title {
            font-size: 15px;
            font-weight: 600;
            color: var(--color-text);
            line-height: 1.5;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-item .news-date {
            flex-shrink: 0;
            white-space: nowrap;
        }

        .news-empty {
            grid-column: 1 / -1;
            background: var(--color-surface);
            border: 2px dashed var(--color-border);
            border-radius: var(--radius-card);
            padding: 60px 30px;
            text-align: center;
            color: var(--color-text-secondary);
        }

        .news-empty i {
            font-size: 40px;
            color: var(--color-border);
            margin-bottom: 14px;
            display: block;
        }

        .news-empty p {
            font-size: 16px;
            line-height: 1.7;
        }

        @media (max-width: 1024px) {
            .news-grid {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 640px) {
            .news-featured .news-card {
                grid-template-columns: 1fr;
            }
            .news-thumb {
                min-height: 180px;
            }
            .news-item {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }
            .news-item .news-date {
                white-space: normal;
            }
        }

        /* ---------- Contact ---------- */
        .contact {
            background: var(--color-bg);
            position: relative;
        }

        .contact::before {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 200px;
            background: linear-gradient(to top, rgba(20, 100, 230, 0.03) 0%, transparent 100%);
            pointer-events: none;
        }

        .contact-grid {
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 60px;
            align-items: start;
            position: relative;
            z-index: 2;
        }

        .contact-info h2 {
            font-size: 32px;
            font-weight: 800;
            line-height: 1.4;
            margin-bottom: 18px;
        }

        .contact-info p {
            color: var(--color-text-secondary);
            margin-bottom: 30px;
            font-size: 15px;
            line-height: 1.8;
        }

        .contact-info-list {
            margin-bottom: 30px;
        }

        .contact-info-list li {
            display: flex;
            align-items: flex-start;
            gap: 16px;
            padding: 12px 0;
            border-bottom: 1px solid var(--color-border);
            font-size: 15px;
            color: var(--color-text);
        }

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

        .contact-info-list i {
            color: var(--color-primary);
            font-size: 18px;
            width: 22px;
            margin-top: 4px;
        }

        .contact-info-list strong {
            display: block;
            font-weight: 600;
            color: var(--color-text);
        }

        .contact-info-list span {
            color: var(--color-text-secondary);
            font-size: 14px;
        }

        .contact-form {
            background: var(--color-surface);
            border-radius: 16px;
            padding: 36px;
            border: 1px solid var(--color-border);
            box-shadow: var(--shadow-card);
        }

        .contact-form h3 {
            font-size: 22px;
            font-weight: 800;
            margin-bottom: 6px;
        }

        .contact-form p {
            font-size: 14px;
            color: var(--color-text-secondary);
            margin-bottom: 24px;
        }

        .form-group {
            margin-bottom: 20px;
        }

        .form-label {
            display: block;
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 6px;
            color: var(--color-text);
        }

        .form-input,
        .form-select,
        .form-textarea {
            width: 100%;
            padding: 12px 16px;
            border: 1px solid var(--color-border);
            border-radius: var(--radius-btn);
            font-size: 15px;
            color: var(--color-text);
            background: var(--color-bg);
            transition: var(--transition-base);
            min-height: 46px;
        }

        .form-input:focus,
        .form-select:focus,
        .form-textarea:focus {
            outline: none;
            border-color: var(--color-primary);
            box-shadow: 0 0 0 3px rgba(20, 100, 230, 0.12);
            background: #fff;
        }

        .form-textarea {
            min-height: 110px;
            resize: vertical;
        }

        .form-hint {
            font-size: 12px;
            color: var(--color-text-secondary);
            margin-top: 8px;
        }

        .form-submit-line {
            margin-top: 8px;
        }

        .form-submit-line .btn {
            width: 100%;
        }

        @media (max-width: 1024px) {
            .contact-grid {
                grid-template-columns: 1fr;
                gap: 40px;
            }
        }

        @media (max-width: 640px) {
            .contact-form {
                padding: 24px 20px;
            }
        }

        /* ---------- Footer ---------- */
        .site-footer {
            background: var(--color-dark);
            color: rgba(255, 255, 255, 0.85);
            padding: 80px 0 0;
            position: relative;
        }

        .site-footer::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(to right, var(--color-primary) 0%, var(--color-secondary) 50%, transparent 100%);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 50px;
        }

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

        .footer-brand .brand-icon {
            width: 36px;
            height: 36px;
            font-size: 18px;
        }

        .footer-brand .brand-text {
            color: #fff;
            font-size: 20px;
        }

        .footer-desc {
            font-size: 14px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.6);
            margin-bottom: 20px;
        }

        .footer-social {
            display: flex;
            gap: 10px;
        }

        .footer-social a {
            width: 40px;
            height: 40px;
            border-radius: 8px;
            background: rgba(255, 255, 255, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255, 255, 255, 0.7);
            font-size: 16px;
            transition: var(--transition-base);
        }

        .footer-social a:hover {
            background: var(--color-primary);
            color: #fff;
            transform: translateY(-2px);
        }

        .footer-title {
            font-size: 16px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 20px;
            position: relative;
            padding-bottom: 10px;
        }

        .footer-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 30px;
            height: 2px;
            background: var(--color-secondary);
        }

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

        .footer-links a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 14px;
            line-height: 1.6;
            transition: var(--transition-base);
            display: inline-block;
            padding: 4px 0;
        }

        .footer-links a:hover {
            color: #fff;
            padding-left: 6px;
        }

        .footer-contact li {
            display: flex;
            gap: 10px;
            margin-bottom: 14px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            line-height: 1.6;
        }

        .footer-contact i {
            color: var(--color-secondary);
            font-size: 14px;
            margin-top: 4px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 24px 0;
            text-align: center;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.45);
        }

        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 30px;
            }
        }

        @media (max-width: 640px) {
            .footer-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ---------- Float CTA ---------- */
        .float-cta {
            position: fixed;
            right: 24px;
            bottom: 24px;
            z-index: 999;
            opacity: 0;
            visibility: hidden;
            transform: translateY(20px);
            transition: var(--transition-base);
        }

        .float-cta.visible {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }

        .float-cta a {
            display: flex;
            align-items: center;
            gap: 8px;
            background: var(--color-secondary);
            color: #fff;
            padding: 14px 24px;
            border-radius: 50px;
            box-shadow: 0 8px 24px rgba(255, 122, 26, 0.35);
            font-weight: 600;
            font-size: 15px;
            transition: var(--transition-base);
        }

        .float-cta a:hover {
            background: var(--color-secondary-dark);
            transform: translateY(-2px);
            box-shadow: 0 12px 30px rgba(255, 122, 26, 0.4);
        }

        @media (max-width: 640px) {
            .float-cta {
                right: 16px;
                bottom: 16px;
            }
            .float-cta a {
                padding: 12px 18px;
                font-size: 14px;
            }
        }

        /* ---------- Utility ---------- */
        .text-center {
            text-align: center;
        }

        .mt-20 {
            margin-top: 20px;
        }

        .mt-40 {
            margin-top: 40px;
        }

        .mb-20 {
            margin-bottom: 20px;
        }

        .mb-40 {
            margin-bottom: 40px;
        }

        .faq-answer.active {
            display: block;
        }

/* roulang page: category1 */
:root {
            --color-primary: #1464e6;
            --color-primary-dark: #0d4fbd;
            --color-secondary: #ff7a1a;
            --color-secondary-dark: #e8650a;
            --color-bg: #f7f9fc;
            --color-surface: #ffffff;
            --color-text: #1a2333;
            --color-text-secondary: #5b6b7c;
            --color-border: #e4e9f0;
            --color-dark: #101826;
            --radius-card: 12px;
            --radius-btn: 8px;
            --radius-badge: 999px;
            --shadow-card: 0 8px 30px rgba(20, 40, 80, 0.08);
            --shadow-card-hover: 0 14px 40px rgba(20, 40, 80, 0.12);
            --container-width: 1200px;
            --section-padding: 96px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: system-ui, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            background: var(--color-bg);
            color: var(--color-text);
            line-height: 1.8;
            -webkit-font-smoothing: antialiased;
        }

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

        ul {
            list-style: none;
        }

        a {
            text-decoration: none;
            color: inherit;
        }

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

        .grid-container {
            max-width: var(--container-width);
            padding: 0 24px;
        }

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

        .section-alt {
            background: var(--color-bg);
        }

        .section-header {
            margin-bottom: 48px;
        }

        .section-tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 700;
            color: var(--color-secondary);
            letter-spacing: 1px;
            margin-bottom: 8px;
            text-transform: uppercase;
        }

        .section-title {
            font-size: 32px;
            font-weight: 800;
            color: var(--color-text);
            line-height: 1.4;
            margin-bottom: 12px;
        }

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

        h1,
        h2,
        h3 {
            font-family: inherit;
            color: var(--color-text);
        }

        .btn-primary,
        .btn-secondary,
        .btn-outline,
        .btn-outline-light,
        .btn-cta-light,
        .btn-cta-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 15px;
            padding: 13px 28px;
            transition: all 0.25s ease;
            cursor: pointer;
            border: 1px solid transparent;
            line-height: 1.4;
        }

        .btn-primary {
            background: var(--color-secondary);
            color: #fff;
            box-shadow: 0 6px 18px rgba(255, 122, 26, 0.2);
        }

        .btn-primary:hover {
            background: var(--color-secondary-dark);
            transform: translateY(-2px);
            box-shadow: 0 12px 28px rgba(255, 122, 26, 0.28);
        }

        .btn-secondary {
            background: var(--color-surface);
            color: var(--color-primary);
            border-color: var(--color-primary);
        }

        .btn-secondary:hover {
            background: rgba(20, 100, 230, 0.06);
            transform: translateY(-2px);
        }

        .btn-outline {
            background: transparent;
            color: var(--color-primary);
            border-color: var(--color-primary);
        }

        .btn-outline:hover {
            background: rgba(20, 100, 230, 0.06);
            transform: translateY(-2px);
        }

        .btn-outline-light {
            background: transparent;
            color: #fff;
            border-color: rgba(255, 255, 255, 0.85);
        }

        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.1);
            transform: translateY(-2px);
        }

        .btn-primary:focus-visible,
        .btn-secondary:focus-visible,
        .btn-outline:focus-visible,
        .btn-outline-light:focus-visible,
        .btn-cta-light:focus-visible,
        .btn-cta-outline:focus-visible,
        a:focus-visible {
            outline: 3px solid rgba(20, 100, 230, 0.35);
            outline-offset: 2px;
        }

        /* Header */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 200;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--color-border);
        }

        .header-top {
            background: #fff;
            border-bottom: 1px solid var(--color-border);
        }

        .header-top-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: 64px;
            gap: 16px;
        }

        .brand-logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 800;
            color: var(--color-text);
        }

        .brand-icon {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--color-primary), #3b82f6);
            color: #fff;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 20px;
            flex-shrink: 0;
        }

        .brand-text {
            font-size: 20px;
            font-weight: 800;
            color: var(--color-text);
        }

        .header-top-right {
            display: flex;
            align-items: center;
            gap: 22px;
        }

        .header-phone {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            font-weight: 600;
            color: var(--color-text);
            transition: color 0.2s;
        }

        .header-phone:hover {
            color: var(--color-primary);
        }

        .header-contact-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: var(--color-primary);
            border: 1px solid var(--color-primary);
            padding: 7px 18px;
            border-radius: var(--radius-btn);
            transition: all 0.25s;
        }

        .header-contact-link:hover {
            background: var(--color-primary);
            color: #fff;
        }

        .menu-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 24px;
            color: var(--color-text);
            cursor: pointer;
            width: 44px;
            height: 44px;
            border-radius: 8px;
        }

        .menu-toggle:hover {
            background: var(--color-bg);
        }

        .channel-nav {
            background: rgba(255, 255, 255, 0.92);
            border-bottom: 1px solid var(--color-border);
        }

        .nav-inner {
            display: flex;
            align-items: center;
            min-height: 52px;
            gap: 4px;
        }

        .nav-link {
            display: inline-block;
            padding: 14px 20px;
            font-size: 15px;
            font-weight: 600;
            color: var(--color-text-secondary);
            border-bottom: 2px solid transparent;
            transition: color 0.2s, border-color 0.2s;
            border-radius: 6px 6px 0 0;
        }

        .nav-link:hover {
            color: var(--color-primary);
            background: rgba(20, 100, 230, 0.04);
        }

        .nav-link.active {
            color: var(--color-primary);
            border-bottom-color: var(--color-primary);
            background: rgba(20, 100, 230, 0.04);
        }

        /* Banner */
        .page-banner {
            position: relative;
            background: url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
            padding: 110px 0;
            color: #fff;
        }

        .banner-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(90deg, rgba(16, 24, 38, 0.78), rgba(16, 24, 38, 0.45) 60%, rgba(16, 24, 38, 0.25));
        }

        .banner-content {
            position: relative;
            z-index: 2;
        }

        .banner-inner {
            max-width: 620px;
        }

        .banner-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            font-weight: 700;
            color: rgba(255, 255, 255, 0.9);
            background: rgba(255, 255, 255, 0.14);
            border: 1px solid rgba(255, 255, 255, 0.25);
            padding: 7px 16px;
            border-radius: var(--radius-badge);
            margin-bottom: 20px;
            letter-spacing: 0.5px;
        }

        .page-banner h1 {
            font-size: 44px;
            font-weight: 900;
            line-height: 1.25;
            color: #fff;
            margin-bottom: 18px;
        }

        .banner-subtitle {
            font-size: 18px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.92);
            max-width: 540px;
            margin-bottom: 32px;
        }

        .banner-btns {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
        }

        /* Breadcrumb */
        .breadcrumb-bar {
            background: var(--color-bg);
            border-bottom: 1px solid var(--color-border);
            padding: 14px 0;
            font-size: 13px;
            color: var(--color-text-secondary);
        }

        .breadcrumb-bar a {
            color: var(--color-primary);
            transition: opacity 0.2s;
        }

        .breadcrumb-bar a:hover {
            opacity: 0.8;
        }

        .breadcrumb-bar .sep {
            margin: 0 8px;
            color: rgba(26, 35, 51, 0.4);
        }

        /* Trust bar */
        .trust-bar {
            background: #fff;
            border-bottom: 1px solid var(--color-border);
        }

        .trust-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            padding: 36px 0;
        }

        .trust-item {
            text-align: center;
            padding: 8px 12px;
        }

        .trust-num {
            font-size: 38px;
            font-weight: 900;
            color: var(--color-primary);
            line-height: 1.2;
        }

        .trust-label {
            font-size: 14px;
            color: var(--color-text-secondary);
            margin-top: 6px;
        }

        /* Features */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 32px;
        }

        .feature-card {
            background: var(--color-surface);
            border-radius: var(--radius-card);
            padding: 32px;
            display: flex;
            gap: 20px;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--color-border);
            transition: transform 0.3s, box-shadow 0.3s;
        }

        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-card-hover);
        }

        .feature-icon {
            width: 56px;
            height: 56px;
            flex-shrink: 0;
            border-radius: 14px;
            background: linear-gradient(135deg, rgba(20, 100, 230, 0.1), rgba(20, 100, 230, 0.06));
            color: var(--color-primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
        }

        .feature-body h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .feature-body p {
            font-size: 15px;
            color: var(--color-text-secondary);
            line-height: 1.8;
        }

        /* Scenarios */
        .scenario-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
        }

        .scenario-card {
            background: var(--color-surface);
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--color-border);
            transition: transform 0.3s, box-shadow 0.3s;
        }

        .scenario-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-card-hover);
        }

        .scenario-img {
            overflow: hidden;
        }

        .scenario-img img {
            width: 100%;
            aspect-ratio: 16 / 10;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

        .scenario-card:hover .scenario-img img {
            transform: scale(1.05);
        }

        .scenario-body {
            padding: 24px;
        }

        .scenario-body h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .scenario-body p {
            font-size: 15px;
            color: var(--color-text-secondary);
            line-height: 1.8;
        }

        /* Process */
        .process-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .process-step {
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            padding: 28px 24px;
            text-align: center;
            transition: transform 0.3s, box-shadow 0.3s, border-color 0.3s;
        }

        .process-step:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card);
            border-color: rgba(20, 100, 230, 0.3);
        }

        .step-num {
            font-size: 30px;
            font-weight: 900;
            color: rgba(20, 100, 230, 0.18);
            line-height: 1;
            margin-bottom: 12px;
        }

        .process-step h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
        }

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

        /* Showcase */
        .showcase-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 32px;
        }

        .showcase-card {
            background: var(--color-surface);
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--color-border);
            display: flex;
            flex-direction: column;
            transition: transform 0.3s, box-shadow 0.3s;
        }

        .showcase-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-card-hover);
        }

        .showcase-card img {
            width: 100%;
            aspect-ratio: 16 / 10;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

        .showcase-card:hover img {
            transform: scale(1.03);
        }

        .showcase-main img {
            aspect-ratio: 16 / 11;
        }

        .showcase-main {
            grid-row: span 2;
        }

        .showcase-body {
            padding: 24px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .showcase-tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 700;
            color: var(--color-secondary);
            background: rgba(255, 122, 26, 0.1);
            border-radius: var(--radius-badge);
            padding: 4px 14px;
            align-self: flex-start;
            margin-bottom: 14px;
            letter-spacing: 0.4px;
        }

        .showcase-body h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .showcase-body p {
            font-size: 15px;
            color: var(--color-text-secondary);
            line-height: 1.8;
        }

        /* Pricing */
        .pricing-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
            align-items: stretch;
        }

        .pricing-card {
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            padding: 32px;
            position: relative;
            display: flex;
            flex-direction: column;
            box-shadow: var(--shadow-card);
            transition: transform 0.3s, box-shadow 0.3s;
        }

        .pricing-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-card-hover);
        }

        .pricing-card.featured {
            border: 2px solid var(--color-primary);
            box-shadow: 0 18px 50px rgba(20, 100, 230, 0.14);
        }

        .badge {
            position: absolute;
            top: -14px;
            left: 32px;
            background: var(--color-primary);
            color: #fff;
            font-size: 12px;
            font-weight: 700;
            padding: 5px 16px;
            border-radius: var(--radius-badge);
            letter-spacing: 0.5px;
        }

        .pricing-card h3 {
            font-size: 22px;
            font-weight: 800;
            margin-bottom: 6px;
        }

        .pricing-desc {
            font-size: 14px;
            color: var(--color-text-secondary);
            margin-bottom: 20px;
        }

        .pricing-price {
            font-size: 36px;
            font-weight: 900;
            color: var(--color-text);
            line-height: 1.2;
            margin-bottom: 24px;
        }

        .pricing-price span {
            font-size: 14px;
            font-weight: 400;
            color: var(--color-text-secondary);
            margin-left: 4px;
        }

        .pricing-list {
            margin-bottom: 28px;
            display: grid;
            gap: 12px;
        }

        .pricing-list li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: 15px;
            color: var(--color-text-secondary);
            line-height: 1.6;
        }

        .pricing-list i {
            color: var(--color-primary);
            margin-top: 3px;
            font-size: 14px;
        }

        .pricing-card .btn-primary,
        .pricing-card .btn-secondary {
            margin-top: auto;
        }

        /* FAQ */
        .faq-wrap {
            display: grid;
            grid-template-columns: 0.85fr 1.15fr;
            gap: 56px;
            align-items: start;
        }

        .faq-left .section-desc {
            margin: 14px 0 24px;
        }

        .faq-contact {
            margin-top: 32px;
            padding-top: 24px;
            border-top: 1px solid var(--color-border);
            display: grid;
            gap: 12px;
        }

        .faq-contact-item {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 15px;
            color: var(--color-text-secondary);
        }

        .faq-contact-item i {
            color: var(--color-primary);
            width: 20px;
            text-align: center;
        }

        .faq-list {
            display: grid;
            gap: 14px;
        }

        .faq-item {
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            overflow: hidden;
            transition: border-color 0.3s, box-shadow 0.3s;
        }

        .faq-item.open {
            border-color: rgba(20, 100, 230, 0.35);
            border-left: 3px solid var(--color-primary);
            box-shadow: var(--shadow-card);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 20px 24px;
            font-size: 16px;
            font-weight: 700;
            color: var(--color-text);
            cursor: pointer;
            transition: color 0.2s;
            min-height: 56px;
        }

        .faq-item.open .faq-question {
            color: var(--color-primary);
        }

        .faq-icon {
            width: 30px;
            height: 30px;
            flex-shrink: 0;
            border-radius: 50%;
            background: var(--color-bg);
            color: var(--color-text-secondary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            transition: transform 0.3s, background 0.3s, color 0.3s;
        }

        .faq-item.open .faq-icon {
            transform: rotate(45deg);
            background: var(--color-primary);
            color: #fff;
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease;
        }

        .faq-item.open .faq-answer {
            max-height: 400px;
        }

        .faq-answer p {
            padding: 0 24px 22px;
            font-size: 15px;
            color: var(--color-text-secondary);
            line-height: 1.8;
        }

        /* Service updates */
        .update-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .update-card {
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-left: 4px solid var(--color-primary);
            border-radius: 10px;
            padding: 24px;
            box-shadow: var(--shadow-card);
            transition: transform 0.3s, box-shadow 0.3s;
        }

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

        .update-date {
            display: inline-block;
            font-size: 13px;
            font-weight: 700;
            color: var(--color-secondary);
            margin-bottom: 8px;
        }

        .update-card p {
            font-size: 15px;
            color: var(--color-text);
            line-height: 1.7;
        }

        /* CTA */
        .cta-section {
            background: linear-gradient(135deg, var(--color-primary) 0%, #0d4fbd 100%);
            color: #fff;
            padding: 84px 0;
            position: relative;
            overflow: hidden;
        }

        .cta-lines {
            position: absolute;
            inset: 0;
            pointer-events: none;
            background: repeating-linear-gradient(90deg, rgba(255, 255, 255, 0.04) 0 2px, transparent 2px 80px);
            opacity: 0.6;
        }

        .cta-inner {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 720px;
            margin: 0 auto;
        }

        .cta-inner h2 {
            font-size: 36px;
            font-weight: 900;
            color: #fff;
            line-height: 1.3;
            margin-bottom: 16px;
        }

        .cta-inner p {
            font-size: 16px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.9);
            margin-bottom: 32px;
        }

        .cta-btns {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
        }

        .btn-cta-light {
            background: #fff;
            color: var(--color-primary);
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
        }

        .btn-cta-light:hover {
            background: rgba(255, 255, 255, 0.9);
            transform: translateY(-2px);
        }

        .btn-cta-outline {
            border: 1px solid rgba(255, 255, 255, 0.85);
            color: #fff;
            background: rgba(255, 255, 255, 0.06);
        }

        .btn-cta-outline:hover {
            background: rgba(255, 255, 255, 0.12);
            transform: translateY(-2px);
        }

        /* Footer */
        .site-footer {
            background: var(--color-dark);
            color: #aab5c5;
            padding-top: 64px;
            font-size: 15px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 48px;
            padding-bottom: 48px;
        }

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

        .footer-brand .brand-text {
            color: #fff;
            font-size: 20px;
            font-weight: 800;
        }

        .footer-desc {
            font-size: 14px;
            line-height: 1.8;
            color: #8b98a9;
            margin-bottom: 20px;
            max-width: 360px;
        }

        .footer-social {
            display: flex;
            gap: 10px;
        }

        .footer-social a {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            transition: background 0.25s, transform 0.25s;
        }

        .footer-social a:hover {
            background: var(--color-secondary);
            transform: translateY(-3px);
        }

        .footer-title {
            font-size: 16px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 18px;
            position: relative;
            padding-bottom: 10px;
        }

        .footer-title::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: 0;
            width: 28px;
            height: 3px;
            border-radius: 2px;
            background: var(--color-secondary);
        }

        .footer-links {
            display: grid;
            gap: 10px;
        }

        .footer-links a {
            color: #8b98a9;
            font-size: 14px;
            transition: color 0.2s, padding-left 0.2s;
        }

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

        .footer-contact {
            display: grid;
            gap: 12px;
        }

        .footer-contact li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            color: #8b98a9;
            font-size: 14px;
            line-height: 1.6;
        }

        .footer-contact i {
            color: var(--color-secondary);
            margin-top: 4px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding: 24px 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 10px;
            font-size: 13px;
            color: #7d8a9c;
        }

        /* Float CTA */
        .float-cta {
            position: fixed;
            right: 24px;
            bottom: 24px;
            z-index: 999;
            background: var(--color-secondary);
            color: #fff;
            border-radius: var(--radius-badge);
            padding: 14px 26px;
            display: none;
            align-items: center;
            gap: 10px;
            box-shadow: 0 10px 30px rgba(255, 122, 26, 0.35);
            font-weight: 600;
            font-size: 15px;
            transition: transform 0.25s, box-shadow 0.25s, opacity 0.3s;
            border: none;
        }

        .float-cta.show {
            display: inline-flex;
        }

        .float-cta:hover {
            transform: translateY(-3px);
            box-shadow: 0 14px 36px rgba(255, 122, 26, 0.42);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            :root {
                --section-padding: 80px;
            }

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

            .showcase-grid {
                grid-template-columns: 1fr 1fr;
            }

            .showcase-main {
                grid-row: auto;
            }

            .faq-wrap {
                grid-template-columns: 1fr;
                gap: 40px;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 36px;
            }
        }

        @media (max-width: 768px) {
            .header-top-right {
                display: none;
            }

            .menu-toggle {
                display: inline-flex;
                align-items: center;
                justify-content: center;
            }

            .channel-nav {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: #fff;
                box-shadow: 0 16px 30px rgba(20, 40, 80, 0.08);
                border-bottom: 1px solid var(--color-border);
            }

            .site-header.open .channel-nav {
                display: block;
            }

            .nav-inner {
                flex-direction: column;
                align-items: stretch;
                padding: 12px 0;
            }

            .nav-link {
                border-bottom: none;
                border-left: 3px solid transparent;
                border-radius: 6px;
                padding: 14px 16px;
            }

            .nav-link.active {
                border-bottom: none;
                border-left-color: var(--color-primary);
                background: rgba(20, 100, 230, 0.06);
            }

            .page-banner {
                padding: 80px 0;
            }

            .page-banner h1 {
                font-size: 34px;
            }

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

            .trust-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
                padding: 28px 0;
            }

            .feature-grid {
                grid-template-columns: 1fr;
            }

            .scenario-grid {
                grid-template-columns: 1fr;
            }

            .process-grid {
                grid-template-columns: 1fr 1fr;
            }

            .showcase-grid {
                grid-template-columns: 1fr;
            }

            .pricing-grid {
                grid-template-columns: 1fr;
            }

            .update-grid {
                grid-template-columns: 1fr;
            }

            .cta-inner h2 {
                font-size: 28px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .float-cta {
                right: 16px;
                bottom: 16px;
                padding: 12px 18px;
                font-size: 14px;
            }
        }

        @media (max-width: 520px) {
            :root {
                --section-padding: 64px;
            }

            .grid-container {
                padding: 0 16px;
            }

            .brand-text {
                font-size: 18px;
            }

            .process-grid {
                grid-template-columns: 1fr;
            }

            .banner-btns {
                flex-direction: column;
                align-items: stretch;
            }

            .banner-btns .btn-primary,
            .banner-btns .btn-outline-light {
                text-align: center;
            }

            .trust-grid {
                grid-template-columns: 1fr 1fr;
            }

            .trust-num {
                font-size: 30px;
            }

            .footer-bottom {
                justify-content: center;
                text-align: center;
            }
        }

/* roulang page: article */
/* ========== 设计变量 ========== */
:root {
  --color-primary: #1464e6;
  --color-primary-dark: #0d4fbe;
  --color-primary-light: rgba(20, 100, 230, 0.08);
  --color-secondary: #ff7a1a;
  --color-secondary-dark: #e56708;
  --color-bg: #f7f9fc;
  --color-surface: #ffffff;
  --color-text: #1a2333;
  --color-text-secondary: #5b6b7c;
  --color-border: #e4e9f0;
  --radius: 12px;
  --radius-btn: 8px;
  --shadow-card: 0 8px 30px rgba(20, 40, 80, 0.08);
  --shadow-hover: 0 14px 40px rgba(20, 40, 80, 0.12);
  --transition: 0.25s ease;
}

/* ========== Reset & Base ========== */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: system-ui, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  font-size: 16px;
  line-height: 1.8;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-primary); text-decoration: none; transition: color 0.2s ease; }
a:hover { color: var(--color-primary-dark); }
h1, h2, h3, h4, h5, h6 { line-height: 1.4; margin: 0 0 0.5em; font-weight: 800; color: var(--color-text); }
p { margin: 0 0 1.5em; }
ul, ol { margin: 0 0 1.5em; padding-left: 1.2em; }
li { margin-bottom: 0.4em; }
button, input, select, textarea { font-family: inherit; font-size: inherit; }
.container { max-width: 1280px; margin: 0 auto; padding: 0 24px; }

/* ========== 按钮 ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius-btn);
  font-weight: 600;
  font-size: 15px;
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition);
  min-height: 44px;
  text-align: center;
  line-height: 1.2;
  background: transparent;
}
.btn:focus-visible {
  outline: 3px solid rgba(20, 100, 230, 0.3);
  outline-offset: 2px;
}
.btn-primary { background: var(--color-secondary); color: #fff; border-color: var(--color-secondary); }
.btn-primary:hover { background: var(--color-secondary-dark); border-color: var(--color-secondary-dark); color: #fff; transform: translateY(-2px); box-shadow: 0 8px 20px rgba(255, 122, 26, 0.25); }
.btn-primary:active { transform: translateY(0); }
.btn-outline { background: transparent; border-color: var(--color-primary); color: var(--color-primary); }
.btn-outline:hover { background: var(--color-primary-light); color: var(--color-primary); transform: translateY(-2px); }
.btn-outline:active { transform: translateY(0); }
.btn-lg { padding: 16px 36px; font-size: 16px; }
.btn-sm { padding: 8px 18px; font-size: 14px; min-height: 36px; }
.btn-block { width: 100%; }

/* ========== Header ========== */
.site-header {
  background: #fff;
  border-bottom: 1px solid var(--color-border);
}
.header-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: 20px;
}
.brand { display: flex; align-items: center; gap: 10px; color: var(--color-text); flex-shrink: 0; }
.brand:hover { color: var(--color-text); }
.brand-icon {
  width: 36px;
  height: 36px;
  background: var(--color-primary);
  color: #fff;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
  font-size: 18px;
  flex-shrink: 0;
}
.brand-text { font-weight: 800; font-size: 20px; letter-spacing: 0.5px; white-space: nowrap; }
.header-actions { display: flex; align-items: center; gap: 16px; }
.header-phone { color: var(--color-text); display: flex; align-items: center; gap: 6px; font-weight: 600; font-size: 15px; white-space: nowrap; }
.header-phone:hover { color: var(--color-primary); }
.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  background: #fff;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  transition: border-color 0.2s;
}
.menu-toggle:hover { border-color: var(--color-primary); }
.menu-toggle span { width: 20px; height: 2px; background: var(--color-text); border-radius: 2px; transition: all 0.3s ease; }
.menu-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.menu-toggle.active span:nth-child(2) { opacity: 0; }
.menu-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ========== 频道导航 ========== */
.channel-nav {
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-top: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 1px 0 rgba(20, 40, 80, 0.03);
}
.channel-nav-inner { display: flex; align-items: center; height: 48px; gap: 4px; }
.nav-link {
  display: flex;
  align-items: center;
  height: 48px;
  padding: 0 18px;
  color: var(--color-text-secondary);
  font-weight: 600;
  font-size: 15px;
  border-bottom: 3px solid transparent;
  transition: all var(--transition);
  white-space: nowrap;
}
.nav-link:hover { color: var(--color-primary); background: rgba(20, 100, 230, 0.03); }
.nav-link.active { color: var(--color-primary); border-bottom-color: var(--color-secondary); }

/* ========== 面包屑 ========== */
.breadcrumb-wrap { background: var(--color-bg); padding: 14px 0; border-bottom: 1px solid var(--color-border); }
.breadcrumb-inner { display: flex; align-items: center; flex-wrap: wrap; gap: 0; font-size: 14px; }
.breadcrumb-wrap a { color: var(--color-text-secondary); display: inline-flex; align-items: center; min-height: 32px; }
.breadcrumb-wrap a:hover { color: var(--color-primary); }
.breadcrumb-wrap .sep { margin: 0 10px; color: #b8c2d0; }
.breadcrumb-wrap .current { color: var(--color-text); font-weight: 600; max-width: 420px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* ========== 文章页头 ========== */
.article-hero {
  background: linear-gradient(135deg, rgba(8, 18, 40, 0.82) 0%, rgba(8, 18, 40, 0.58) 60%, rgba(20, 100, 230, 0.35) 100%), url('/assets/images/backpic/back-1.webp') center / cover no-repeat;
  padding: 88px 0 72px;
  color: #fff;
}
.article-heading { max-width: 880px; }
.article-category {
  display: inline-block;
  background: var(--color-secondary);
  color: #fff;
  font-size: 13px;
  font-weight: 700;
  padding: 4px 16px;
  border-radius: 999px;
  margin-bottom: 18px;
  letter-spacing: 0.5px;
}
.article-hero h1 { font-size: 42px; line-height: 1.3; margin-bottom: 18px; color: #fff; }
.article-meta { display: flex; align-items: center; gap: 12px; color: rgba(255, 255, 255, 0.85); font-size: 14px; flex-wrap: wrap; }
.article-meta i { margin-right: 4px; }
.meta-sep { color: rgba(255, 255, 255, 0.4); }

/* ========== 主内容区 ========== */
.article-main { padding: 56px 0 80px; }
.article-layout { align-items: flex-start; }
.article-layout .cell { min-width: 0; }
.article-body {
  background: var(--color-surface);
  border-radius: var(--radius);
  padding: 48px;
  box-shadow: var(--shadow-card);
}
.article-body > *:last-child { margin-bottom: 0; }
.article-body p { font-size: 16px; line-height: 1.9; color: #33404f; }
.article-body h2 { font-size: 26px; margin: 1.8em 0 0.6em; padding-left: 14px; border-left: 4px solid var(--color-primary); }
.article-body h3 { font-size: 20px; margin: 1.5em 0 0.5em; }
.article-body a { color: var(--color-primary); text-decoration: underline; text-underline-offset: 3px; }
.article-body a:hover { color: var(--color-secondary); }
.article-body img { border-radius: var(--radius); margin: 28px auto; }
.article-body blockquote { margin: 28px 0; padding: 20px 24px; background: var(--color-bg); border-left: 4px solid var(--color-secondary); border-radius: 0 8px 8px 0; color: var(--color-text-secondary); font-style: normal; }
.article-body ul, .article-body ol { margin-bottom: 1.6em; }
.article-body li { line-height: 1.9; }
.article-body figure { margin: 28px 0; }
.article-body figcaption { font-size: 13px; color: var(--color-text-secondary); text-align: center; margin-top: 8px; }
.article-body table { width: 100%; border-collapse: collapse; margin: 24px 0; font-size: 15px; }
.article-body th, .article-body td { border: 1px solid var(--color-border); padding: 10px 14px; text-align: left; }
.article-body th { background: var(--color-bg); font-weight: 700; }
.article-body hr { border: none; border-top: 1px solid var(--color-border); margin: 32px 0; }
.article-body code { background: var(--color-bg); border-radius: 4px; padding: 2px 6px; font-size: 14px; }

/* 空态 */
.empty-state { text-align: center; padding: 70px 20px; }
.empty-state i { font-size: 56px; color: #c6d0dd; margin-bottom: 18px; }
.empty-state h2 { font-size: 24px; margin-bottom: 8px; }
.empty-state p { color: var(--color-text-secondary); margin-bottom: 24px; }

/* 分页 */
.article-pagination {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
  flex-wrap: wrap;
}
.pagination-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 16px;
  color: var(--color-text-secondary);
  font-weight: 600;
  font-size: 14px;
  border-radius: var(--radius-btn);
  transition: all var(--transition);
}
.pagination-link:hover { color: var(--color-primary); background: var(--color-primary-light); }

/* ========== 侧边栏 ========== */
.sidebar-sticky { display: flex; flex-direction: column; gap: 24px; }
@media (min-width: 1024px) {
  .sidebar-sticky { position: sticky; top: 76px; }
}
.sidebar-widget {
  background: var(--color-surface);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow-card);
}
.sidebar-widget h3 {
  font-size: 17px;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--color-bg);
  position: relative;
}
.sidebar-widget h3::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 36px;
  height: 2px;
  background: var(--color-secondary);
  border-radius: 2px;
}
.sidebar-list { list-style: none; margin: 0; padding: 0; }
.sidebar-list li { margin: 0; }
.sidebar-list a {
  display: flex;
  align-items: center;
  min-height: 44px;
  padding: 8px 0;
  color: var(--color-text-secondary);
  border-bottom: 1px solid #f2f4f8;
  transition: all var(--transition);
  font-size: 15px;
}
.sidebar-list a:hover { color: var(--color-primary); padding-left: 8px; }
.sidebar-list li:last-child a { border-bottom: none; }
.sidebar-about p { font-size: 14px; color: var(--color-text-secondary); margin-bottom: 16px; }
.contact-widget { background: var(--color-primary); color: #fff; }
.contact-widget h3 { color: #fff; border-bottom: 1px solid rgba(255, 255, 255, 0.2); }
.contact-widget h3::after { background: #fff; }
.contact-widget p { color: rgba(255, 255, 255, 0.9); font-size: 15px; margin-bottom: 16px; }
.contact-widget .btn-primary { background: var(--color-secondary); border-color: var(--color-secondary); }
.contact-widget .btn-primary:hover { background: var(--color-secondary-dark); border-color: var(--color-secondary-dark); }

/* ========== 相关推荐 ========== */
.related-section { background: var(--color-bg); padding: 72px 0; border-top: 1px solid var(--color-border); }
.section-head { display: flex; justify-content: space-between; align-items: flex-end; margin-bottom: 36px; gap: 16px; flex-wrap: wrap; }
.section-head h2 { font-size: 30px; margin: 0; }
.section-link { color: var(--color-primary); font-weight: 600; font-size: 15px; display: inline-flex; align-items: center; gap: 6px; min-height: 44px; }
.section-link:hover { color: var(--color-secondary); }
.related-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.related-card {
  background: var(--color-surface);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: all 0.3s ease;
  display: block;
  color: var(--color-text);
}
.related-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); color: var(--color-text); }
.related-thumb { aspect-ratio: 16 / 10; overflow: hidden; background: #eceff5; }
.related-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s ease; }
.related-card:hover .related-thumb img { transform: scale(1.05); }
.related-info { padding: 20px 20px 22px; }
.related-info .badge {
  display: inline-block;
  background: var(--color-primary-light);
  color: var(--color-primary);
  font-size: 12px;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 999px;
  margin-bottom: 10px;
}
.related-info h3 { font-size: 16px; margin: 0; line-height: 1.5; }

/* ========== CTA ========== */
.cta-section {
  background: #101826;
  color: #fff;
  padding: 72px 0;
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: '';
  position: absolute;
  right: -80px;
  top: -80px;
  width: 320px;
  height: 320px;
  border: 1px solid rgba(255, 122, 26, 0.3);
  border-radius: 50%;
}
.cta-section::after {
  content: '';
  position: absolute;
  right: -40px;
  top: -40px;
  width: 160px;
  height: 160px;
  border: 1px solid rgba(20, 100, 230, 0.4);
  border-radius: 50%;
}
.cta-inner { position: relative; z-index: 1; text-align: center; max-width: 760px; margin: 0 auto; padding: 0 24px; }
.cta-inner h2 { font-size: 32px; margin-bottom: 14px; color: #fff; }
.cta-inner p { color: rgba(255, 255, 255, 0.8); margin: 0 0 32px; font-size: 16px; }
.cta-actions { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; }

/* ========== 页脚 ========== */
.site-footer { background: #0d1421; color: #9ba8b8; padding: 64px 0 0; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.2fr; gap: 40px; padding-bottom: 48px; }
.footer-brand { display: flex; align-items: center; gap: 10px; margin-bottom: 16px; }
.footer-brand .brand-icon {
  width: 34px;
  height: 34px;
  background: var(--color-primary);
  color: #fff;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
  font-size: 16px;
}
.footer-brand .brand-text { color: #fff; font-weight: 800; font-size: 20px; }
.footer-desc { font-size: 14px; line-height: 1.8; color: #7d8b9d; margin-bottom: 20px; }
.footer-social { display: flex; gap: 12px; }
.footer-social a {
  width: 36px;
  height: 36px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 14px;
  transition: all var(--transition);
}
.footer-social a:hover { background: var(--color-primary); border-color: var(--color-primary); color: #fff; }
.footer-title { color: #fff; font-size: 16px; margin-bottom: 18px; font-weight: 700; }
.footer-links,
.footer-contact { list-style: none; margin: 0; padding: 0; }
.footer-links li,
.footer-contact li { margin-bottom: 10px; }
.footer-links a { color: #7d8b9d; font-size: 14px; display: inline-flex; align-items: center; min-height: 30px; transition: color var(--transition); }
.footer-links a:hover { color: var(--color-secondary); }
.footer-contact li { font-size: 14px; display: flex; align-items: flex-start; gap: 8px; color: #7d8b9d; line-height: 1.7; }
.footer-contact i { color: var(--color-secondary); margin-top: 4px; }
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 20px 0;
  text-align: center;
  font-size: 13px;
  color: #5a6a7a;
}
.footer-bottom-inner { display: flex; flex-direction: column; gap: 4px; }
.footer-domain { opacity: 0.8; }

/* ========== 浮动 CTA ========== */
.floating-cta {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 99;
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--color-secondary);
  color: #fff;
  padding: 14px 22px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 14px;
  box-shadow: 0 10px 30px rgba(255, 122, 26, 0.35);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all 0.3s ease;
}
.floating-cta.show { opacity: 1; visibility: visible; transform: translateY(0); }
.floating-cta:hover { background: var(--color-secondary-dark); color: #fff; transform: translateY(-2px); }
.floating-cta:focus-visible { outline: 3px solid rgba(255, 122, 26, 0.4); outline-offset: 2px; }

/* ========== 响应式 ========== */
@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .article-hero { padding: 64px 0 48px; }
  .article-hero h1 { font-size: 34px; }
  .related-grid { grid-template-columns: repeat(2, 1fr); }
  .cta-inner h2 { font-size: 28px; }
}

@media (max-width: 768px) {
  .container { padding: 0 20px; }
  .article-main { padding: 40px 0 56px; }
  .article-body { padding: 32px 24px; }
  .article-body h2 { font-size: 22px; }
  .article-body p { font-size: 15px; }
  .section-head h2 { font-size: 26px; }
  .related-grid { gap: 20px; }
  .cta-section { padding: 56px 0; }
  .cta-actions { flex-direction: column; align-items: stretch; }
  .cta-actions .btn { width: 100%; }
  .site-footer { padding-top: 48px; }
}

@media (max-width: 640px) {
  .container { padding: 0 16px; }
  .header-top { height: 60px; }
  .brand-text { font-size: 18px; }
  .header-phone { display: none; }
  .header-actions .btn-outline { display: none; }
  .menu-toggle { display: flex; }
  .channel-nav {
    display: none;
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    background: #fff;
    border-bottom: 1px solid var(--color-border);
    box-shadow: 0 20px 40px rgba(20, 40, 80, 0.12);
    z-index: 100;
  }
  .channel-nav.show { display: block; }
  .channel-nav-inner { flex-direction: column; align-items: stretch; height: auto; padding: 8px 0; }
  .nav-link { height: 48px; width: 100%; padding: 0 16px; border-bottom: 1px solid var(--color-border); }
  .nav-link:last-child { border-bottom: none; }
  .article-hero { padding: 48px 0 40px; }
  .article-hero h1 { font-size: 28px; }
  .article-meta { font-size: 13px; gap: 8px; }
  .article-body { padding: 28px 20px; }
  .article-body blockquote { padding: 16px; }
  .article-pagination { flex-direction: column; }
  .related-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .cta-inner h2 { font-size: 24px; }
  .floating-cta { padding: 13px 16px; }
  .floating-cta span { display: none; }
  .floating-cta { border-radius: 50%; width: 50px; height: 50px; justify-content: center; right: 16px; bottom: 16px; }
  .breadcrumb-wrap .current { max-width: 180px; }
}

@media (max-width: 520px) {
  .article-hero h1 { font-size: 24px; }
  .section-head h2 { font-size: 22px; }
  .section-head { align-items: flex-start; }
  .btn-lg { padding: 14px 24px; }
  .sidebar-widget { padding: 20px; }
}