/* roulang page: index */
:root {
            --color-primary: #4A90D9;
            --color-primary-dark: #3A76B5;
            --color-primary-light: #8AB8E8;
            --color-primary-soft: rgba(74, 144, 217, 0.1);
            --color-accent: #00B386;
            --color-accent-dark: #009975;
            --color-accent-soft: rgba(0, 179, 134, 0.1);
            --color-bg: #F5F8FB;
            --color-bg-alt: #EDF3F8;
            --color-card: #FFFFFF;
            --color-text: #1A2430;
            --color-text-body: #4A5568;
            --color-text-light: #8A94A6;
            --color-border: #E2E9F0;
            --color-footer-bg: #132536;
            --color-footer-text: #8A94A6;
            --color-success: #00B386;
            --color-warning: #F5A623;
            --color-error: #E5484D;
            --radius-card: 12px;
            --radius-btn: 8px;
            --radius-chip: 6px;
            --shadow-card: 0 2px 8px rgba(74, 144, 217, 0.08);
            --shadow-card-hover: 0 8px 24px rgba(74, 144, 217, 0.15);
            --shadow-float: 0 4px 16px rgba(74, 144, 217, 0.1);
            --transition-base: all 0.25s ease;
            --container-max: 1240px;
            --space-section: 80px;
            --space-section-mobile: 56px;
            --font-main: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
            --font-mono: "SF Mono", Consolas, "Liberation Mono", monospace;
        }

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

        html { scroll-behavior: smooth; font-size: 16px; }

        body {
            font-family: var(--font-main);
            background-color: var(--color-bg);
            color: var(--color-text-body);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

        img { max-width: 100%; display: block; }
        a { color: var(--color-primary); text-decoration: none; transition: color 0.2s ease; }
        a:hover { color: var(--color-primary-dark); }
        ul, ol { list-style: none; }
        button { font-family: inherit; border: none; cursor: pointer; background: none; }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: 32px;
            padding-right: 32px;
        }

        .section { padding: var(--space-section) 0; }
        .section-alt { background-color: var(--color-bg-alt); }
        .section-white { background-color: var(--color-card); }

        .section-header {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 40px;
        }
        .section-header .line {
            width: 2px;
            height: 24px;
            background-color: var(--color-primary);
            border-radius: 2px;
            flex-shrink: 0;
        }
        .section-header .line.accent {
            background-color: var(--color-accent);
        }
        .section-header h2 {
            font-size: 28px;
            font-weight: 700;
            color: var(--color-text);
            line-height: 1.3;
            letter-spacing: -0.5px;
        }
        .section-sub {
            font-size: 15px;
            color: var(--color-text-light);
            margin-top: -28px;
            margin-bottom: 40px;
            padding-left: 14px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 44px;
            padding: 0 24px;
            border-radius: var(--radius-btn);
            font-size: 15px;
            font-weight: 600;
            letter-spacing: 0.3px;
            transition: var(--transition-base);
            white-space: nowrap;
        }
        .btn-primary {
            background-color: var(--color-primary);
            color: #fff;
        }
        .btn-primary:hover {
            background-color: var(--color-primary-dark);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 6px 16px rgba(74, 144, 217, 0.25);
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: none;
        }
        .btn-primary:focus-visible {
            outline: 2px solid rgba(74, 144, 217, 0.4);
            outline-offset: 2px;
        }
        .btn-secondary {
            background: #fff;
            border: 1px solid var(--color-primary);
            color: var(--color-primary);
        }
        .btn-secondary:hover {
            background: rgba(74, 144, 217, 0.05);
            border-color: var(--color-primary-dark);
            color: var(--color-primary-dark);
        }
        .btn-accent {
            background-color: var(--color-accent);
            color: #fff;
        }
        .btn-accent:hover {
            background-color: var(--color-accent-dark);
            color: #fff;
        }
        .btn-lg { height: 52px; padding: 0 36px; font-size: 16px; }
        .btn-sm { height: 38px; padding: 0 18px; font-size: 14px; }

        .text-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--color-primary);
            font-weight: 500;
            font-size: 14px;
            background: none;
            padding: 0;
        }
        .text-link i { transition: transform 0.25s ease; font-size: 12px; }
        .text-link:hover { color: var(--color-primary-dark); }
        .text-link:hover i { transform: translateX(4px); }

        .badge {
            display: inline-flex;
            align-items: center;
            padding: 3px 10px;
            border-radius: var(--radius-chip);
            font-size: 12px;
            font-weight: 500;
            background-color: var(--color-primary-soft);
            color: var(--color-primary);
        }
        .badge-accent {
            background-color: var(--color-accent);
            color: #fff;
            font-weight: 600;
            padding: 2px 8px;
            font-size: 12px;
            border-radius: var(--radius-chip);
        }
        .badge-official {
            background-color: rgba(74, 144, 217, 0.12);
            color: var(--color-primary);
            padding: 2px 8px;
            border-radius: var(--radius-chip);
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 0.5px;
        }

        .card {
            background: var(--color-card);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            transition: var(--transition-base);
        }
        .card-hover:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
        }

        /* ===== Header & Navigation ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(8px);
            border-bottom: 1px solid var(--color-border);
            box-shadow: 0 2px 12px rgba(74, 144, 217, 0.06);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 20px;
        }
        .logo-area {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-shrink: 0;
        }
        .logo-text {
            font-size: 21px;
            font-weight: 800;
            color: var(--color-text);
            letter-spacing: -0.5px;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .logo-text span { color: var(--color-primary); }
        .nav-chip-wrap {
            display: flex;
            align-items: center;
            gap: 8px;
            overflow-x: auto;
            scrollbar-width: none;
            padding: 4px;
            -ms-overflow-style: none;
        }
        .nav-chip-wrap::-webkit-scrollbar { display: none; }
        .nav-chip {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 8px 18px;
            border-radius: 20px;
            font-size: 14px;
            font-weight: 500;
            color: var(--color-text-body);
            background: transparent;
            border: 1px solid var(--color-border);
            transition: var(--transition-base);
            white-space: nowrap;
        }
        .nav-chip i { font-size: 14px; opacity: 0.75; }
        .nav-chip:hover {
            background: var(--color-primary-soft);
            border-color: transparent;
            color: var(--color-primary);
        }
        .nav-chip.active {
            background: var(--color-primary);
            color: #fff;
            border-color: var(--color-primary);
        }
        .nav-chip.active i { opacity: 1; }
        .header-cta {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }
        .header-cta .btn { height: 40px; padding: 0 20px; font-size: 14px; }

        .mobile-toggle {
            display: none;
            width: 42px;
            height: 42px;
            border-radius: 8px;
            align-items: center;
            justify-content: center;
            background: var(--color-bg);
            color: var(--color-text);
            font-size: 20px;
            cursor: pointer;
            transition: var(--transition-base);
        }
        .mobile-toggle:hover { background: var(--color-primary-soft); color: var(--color-primary); }

        .mobile-nav {
            display: none;
            padding: 16px 20px 24px;
            border-top: 1px solid var(--color-border);
            background: #fff;
        }
        .mobile-nav.show { display: block; }
        .mobile-nav .nav-chip-mobile {
            display: block;
            width: 100%;
            text-align: left;
            padding: 14px 16px;
            border-radius: 8px;
            font-size: 15px;
            font-weight: 500;
            color: var(--color-text-body);
            border-bottom: 1px solid rgba(226, 233, 240, 0.5);
            transition: var(--transition-base);
        }
        .mobile-nav .nav-chip-mobile:last-child { border-bottom: none; }
        .mobile-nav .nav-chip-mobile:hover { background: var(--color-primary-soft); color: var(--color-primary); }
        .mobile-nav .nav-chip-mobile.active { background: var(--color-primary-soft); color: var(--color-primary); font-weight: 600; }
        .mobile-nav .btn {
            margin-top: 16px;
            width: 100%;
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            background: linear-gradient(transparent, rgba(255,255,255,0.3)), url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
            background-color: var(--color-bg-alt);
            padding: 88px 0 80px;
            overflow: hidden;
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(255, 255, 255, 0.88);
            z-index: 1;
        }
        .hero::after {
            content: '';
            position: absolute;
            top: -80px;
            right: -60px;
            width: 320px;
            height: 320px;
            border-radius: 50%;
            background: rgba(74, 144, 217, 0.06);
            z-index: 1;
        }
        .hero .container {
            position: relative;
            z-index: 2;
            display: flex;
            align-items: center;
            gap: 48px;
        }
        .hero-left {
            flex: 0 0 55%;
            max-width: 640px;
        }
        .hero-right {
            flex: 0 0 45%;
            max-width: 520px;
        }
        .hero-right img {
            width: 100%;
            border-radius: var(--radius-card);
            box-shadow: 0 10px 30px rgba(74, 144, 217, 0.18);
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.85);
            border: 1px solid rgba(74, 144, 217, 0.25);
            padding: 6px 16px;
            border-radius: 24px;
            font-size: 13px;
            font-weight: 500;
            color: var(--color-primary);
            margin-bottom: 20px;
            backdrop-filter: blur(6px);
        }
        .hero-badge .dot {
            width: 6px;
            height: 6px;
            background: var(--color-accent);
            border-radius: 50%;
            animation: pulse 2s infinite;
        }
        @keyframes pulse {
            0%, 100% { opacity: 1; transform: scale(1); }
            50% { opacity: 0.5; transform: scale(0.8); }
        }
        .hero h1 {
            font-size: 42px;
            font-weight: 800;
            line-height: 1.25;
            color: var(--color-text);
            letter-spacing: -1px;
            margin-bottom: 20px;
        }
        .hero h1 .highlight {
            color: var(--color-primary);
        }
        .hero-sub {
            font-size: 16px;
            color: var(--color-text-body);
            line-height: 1.7;
            margin-bottom: 32px;
            max-width: 480px;
        }
        .hero-stats {
            display: flex;
            gap: 40px;
            margin-top: 40px;
        }
        .hero-stat .num {
            font-family: var(--font-mono);
            font-size: 28px;
            font-weight: 700;
            color: var(--color-primary);
            line-height: 1.2;
        }
        .hero-stat .label {
            font-size: 13px;
            color: var(--color-text-light);
            margin-top: 4px;
        }
        .hero-actions {
            display: flex;
            align-items: center;
            gap: 24px;
            flex-wrap: wrap;
        }

        /* ===== Features 功能分组 ===== */
        .features-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
            max-width: 960px;
            margin: 0 auto;
        }
        .feature-card {
            padding: 24px;
            display: flex;
            gap: 16px;
            align-items: flex-start;
        }
        .feature-card.offset-right { margin-right: -48px; }
        .feature-card.offset-left { margin-left: -48px; }
        .feature-icon {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--color-primary-soft);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: var(--color-primary);
            flex-shrink: 0;
        }
        .feature-card h3 {
            font-size: 16px;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 6px;
        }
        .feature-card p {
            font-size: 14px;
            color: var(--color-text-light);
            line-height: 1.6;
        }

        /* ===== Scenarios 使用场景 ===== */
        .scenario-block {
            display: flex;
            align-items: center;
            gap: 64px;
            padding: 32px 0;
        }
        .scenario-block:nth-child(even) {
            flex-direction: row-reverse;
        }
        .scenario-text {
            flex: 1;
        }
        .scenario-text h3 {
            font-size: 22px;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 16px;
            line-height: 1.4;
        }
        .scenario-text p {
            font-size: 14px;
            color: var(--color-text-light);
            margin-bottom: 20px;
            line-height: 1.7;
        }
        .scenario-check-list li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: 14px;
            color: var(--color-text-body);
            margin-bottom: 10px;
        }
        .scenario-check-list li i {
            color: var(--color-accent);
            font-size: 14px;
            margin-top: 4px;
            flex-shrink: 0;
        }
        .scenario-image {
            flex: 1;
            max-width: 480px;
        }
        .scenario-image img {
            width: 100%;
            aspect-ratio: 4 / 3;
            object-fit: cover;
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
        }

        /* ===== Case 案例 ===== */
        .case-scroll {
            overflow-x: auto;
            padding-bottom: 12px;
            margin: 0 -0px;
            scrollbar-width: thin;
        }
        .case-track {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            min-width: 0;
        }
        .case-card {
            overflow: hidden;
            display: flex;
            flex-direction: column;
        }
        .case-card-img {
            height: 140px;
            background: var(--color-bg-alt);
            overflow: hidden;
        }
        .case-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .case-card:hover .case-card-img img { transform: scale(1.05); }
        .case-card-body {
            padding: 16px 20px 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .case-card-body h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--color-text);
            line-height: 1.4;
        }
        .case-card-body p {
            font-size: 13px;
            color: var(--color-text-light);
            line-height: 1.6;
            flex: 1;
        }
        .case-card-footer {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 13px;
        }
        .case-card-footer .client { color: var(--color-text-light); }
        .case-card-footer .result {
            font-weight: 700;
            color: var(--color-accent);
            font-family: var(--font-mono);
            font-size: 16px;
        }

        /* ===== Pricing 价格 ===== */
        .pricing-wrapper {
            display: flex;
            gap: 0;
            background: var(--color-card);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            overflow: hidden;
        }
        .pricing-compare {
            flex: 0 0 34%;
            padding: 32px;
            border-right: 1px solid var(--color-border);
        }
        .pricing-compare h3 {
            font-size: 16px;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 24px;
        }
        .compare-row {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 10px 0;
            font-size: 14px;
            color: var(--color-text-body);
            border-bottom: 1px dashed rgba(226, 233, 240, 0.7);
        }
        .compare-row:last-child { border-bottom: none; }
        .compare-row i {
            color: var(--color-accent);
            font-size: 14px;
            width: 18px;
            flex-shrink: 0;
        }
        .pricing-tiers {
            flex: 1;
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 0;
        }
        .price-card {
            padding: 32px 24px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            border-left: 1px solid var(--color-border);
            position: relative;
            transition: var(--transition-base);
        }
        .price-card:hover {
            background: var(--color-bg);
        }
        .price-card.recommend {
            background: linear-gradient(180deg, rgba(74, 144, 217, 0.04), rgba(0, 0, 0, 0));
        }
        .price-card.recommend .badge-accent {
            position: absolute;
            top: 12px;
            right: 12px;
        }
        .price-tag {
            margin-bottom: 12px;
        }
        .price-tag .name {
            font-size: 16px;
            font-weight: 700;
            color: var(--color-text);
            margin-right: 8px;
        }
        .price-tag .amount {
            font-size: 28px;
            font-weight: 700;
            font-family: var(--font-mono);
            color: var(--color-text);
            display: inline-flex;
            align-items: baseline;
        }
        .price-tag .amount .symbol {
            font-size: 16px;
            font-weight: 600;
            color: var(--color-text-light);
            margin-right: 2px;
        }
        .price-tag .period {
            font-size: 13px;
            color: var(--color-text-light);
            margin-left: 4px;
        }
        .price-desc {
            font-size: 13px;
            color: var(--color-text-light);
            margin-bottom: 16px;
            line-height: 1.6;
        }
        .price-feature-list li {
            font-size: 13px;
            color: var(--color-text-body);
            padding: 5px 0;
            padding-left: 20px;
            position: relative;
        }
        .price-feature-list li::before {
            content: '';
            position: absolute;
            left: 0;
            top: 12px;
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--color-primary-light);
            border: 2px solid var(--color-primary);
        }
        .price-card .btn {
            margin-top: 20px;
            width: 100%;
        }

        /* ===== CTA 通栏 ===== */
        .cta-banner {
            border: 1px solid rgba(74, 144, 217, 0.2);
            background: var(--color-bg-alt);
            border-radius: 16px;
            padding: 40px 48px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            flex-wrap: wrap;
        }
        .cta-banner h3 {
            font-size: 22px;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 8px;
        }
        .cta-banner p {
            font-size: 14px;
            color: var(--color-text-light);
            max-width: 560px;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--color-footer-bg);
            padding: 56px 0 0;
            margin-top: 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 40px;
            padding-bottom: 48px;
        }
        .footer-brand .logo-text {
            color: #fff;
            margin-bottom: 16px;
        }
        .footer-brand .logo-text span { color: var(--color-primary-light); }
        .footer-brand p {
            font-size: 14px;
            color: var(--color-footer-text);
            line-height: 1.7;
            max-width: 320px;
        }
        .footer-col h4 {
            font-size: 14px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
        }
        .footer-col ul li { margin-bottom: 10px; }
        .footer-col ul li a {
            font-size: 14px;
            color: var(--color-footer-text);
            transition: color 0.2s ease;
        }
        .footer-col ul li a:hover {
            color: #fff;
        }
        .footer-contact li {
            display: flex;
            align-items: flex-start;
            gap: 8px;
            color: var(--color-footer-text);
            font-size: 14px;
            margin-bottom: 12px;
        }
        .footer-contact li i {
            color: var(--color-primary-light);
            margin-top: 4px;
            width: 16px;
            flex-shrink: 0;
            font-size: 14px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding: 20px 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
        }
        .footer-bottom p {
            font-size: 13px;
            color: var(--color-footer-text);
        }
        .footer-bottom a { color: var(--color-footer-text); }
        .footer-bottom a:hover { color: #fff; }

        /* ===== FAQ ===== */
        .faq-wrapper {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .faq-item {
            background: var(--color-card);
            border-radius: 10px;
            box-shadow: var(--shadow-card);
            overflow: hidden;
            transition: var(--transition-base);
        }
        .faq-item.active {
            border-left: 3px solid rgba(74, 144, 217, 0.35);
        }
        .faq-question {
            display: flex;
            align-items: center;
            gap: 16px;
            padding: 18px 24px;
            cursor: pointer;
            font-size: 15px;
            font-weight: 600;
            color: var(--color-text);
            background: transparent;
            width: 100%;
            text-align: left;
            transition: background 0.2s ease;
        }
        .faq-question:hover { background: rgba(74, 144, 217, 0.03); }
        .faq-q-icon {
            width: 24px;
            height: 24px;
            min-width: 24px;
            background: var(--color-primary);
            color: #fff;
            border-radius: 5px;
            font-size: 12px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .faq-arrow {
            margin-left: auto;
            font-size: 14px;
            color: var(--color-text-light);
            transition: transform 0.3s ease;
        }
        .faq-item.active .faq-arrow { transform: rotate(180deg); }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease;
        }
        .faq-answer-inner {
            padding: 0 24px 20px;
            font-size: 14px;
            color: var(--color-text-light);
            line-height: 1.7;
            padding-left: 64px;
        }

        /* ===== CTA / Contact ===== */
        .contact-section {
            padding: 72px 0 64px;
            background: var(--color-bg);
        }
        .contact-card {
            background: var(--color-card);
            border-radius: 16px;
            box-shadow: var(--shadow-card);
            padding: 48px;
            display: flex;
            gap: 48px;
            align-items: center;
            max-width: 960px;
            margin: 0 auto;
        }
        .contact-info {
            flex: 1;
        }
        .contact-info h3 {
            font-size: 24px;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 12px;
        }
        .contact-info p {
            font-size: 14px;
            color: var(--color-text-light);
            margin-bottom: 24px;
            line-height: 1.7;
        }
        .contact-methods {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .contact-method {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 14px;
            color: var(--color-text-body);
        }
        .contact-method i {
            width: 36px;
            height: 36px;
            min-width: 36px;
            background: var(--color-primary-soft);
            color: var(--color-primary);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 15px;
        }
        .contact-form {
            flex: 1;
        }
        .form-group { margin-bottom: 18px; }
        .form-group label {
            display: block;
            font-size: 13px;
            font-weight: 600;
            color: var(--color-text);
            margin-bottom: 6px;
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            height: 44px;
            padding: 12px;
            border: 1px solid #CBD5E0;
            border-radius: var(--radius-btn);
            font-size: 14px;
            font-family: inherit;
            color: var(--color-text);
            background: #fff;
            transition: var(--transition-base);
        }
        .form-group textarea {
            height: 100px;
            resize: vertical;
        }
        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            outline: none;
            border-color: var(--color-primary);
            box-shadow: 0 0 0 3px rgba(74, 144, 217, 0.3);
        }
        .form-group input::placeholder,
        .form-group textarea::placeholder {
            color: #A0AEC0;
        }

        /* ===== 资讯列表（首页） ===== */
        .news-layout {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
            align-items: stretch;
        }
        .news-main-card {
            padding: 0;
            overflow: hidden;
            display: flex;
            flex-direction: column;
        }
        .news-main-card .news-img {
            height: 180px;
            overflow: hidden;
        }
        .news-main-card .news-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .news-main-body {
            padding: 20px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .news-main-body .news-title {
            font-size: 18px;
            font-weight: 700;
            color: var(--color-text);
            line-height: 1.4;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-main-body .news-title a { color: inherit; }
        .news-main-body .news-title a:hover { color: var(--color-primary); }
        .news-excerpt {
            font-size: 14px;
            color: var(--color-text-light);
            line-height: 1.7;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 13px;
            color: var(--color-text-light);
            margin-top: 16px;
            padding-top: 12px;
            border-top: 1px solid var(--color-border);
        }
        .news-meta .badge {
            font-size: 12px;
            padding: 2px 8px;
        }
        .news-right-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .news-small-item {
            display: flex;
            gap: 14px;
            padding: 14px;
            align-items: center;
        }
        .news-small-item .thumb {
            width: 64px;
            height: 64px;
            min-width: 64px;
            border-radius: 10px;
            overflow: hidden;
        }
        .news-small-item .thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .news-small-body {
            flex: 1;
            min-width: 0;
        }
        .news-small-body .news-title {
            font-size: 15px;
            font-weight: 600;
            color: var(--color-text);
            line-height: 1.4;
            margin-bottom: 4px;
            display: -webkit-box;
            -webkit-line-clamp: 1;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-small-body .news-title a { color: inherit; }
        .news-small-body .news-title a:hover { color: var(--color-primary); }
        .news-small-time {
            font-size: 12px;
            color: var(--color-text-light);
        }
        .news-small-cat {
            font-size: 12px;
            color: var(--color-primary);
        }
        .news-empty {
            border: 2px dashed var(--color-border);
            border-radius: var(--radius-card);
            padding: 60px 20px;
            text-align: center;
            color: var(--color-text-light);
            font-size: 15px;
            background: var(--color-card);
            grid-column: 1 / -1;
        }
        .news-empty i {
            font-size: 40px;
            margin-bottom: 16px;
            color: var(--color-border);
        }
        .news-empty p { color: var(--color-text-light); }

        /* ===== Scroll Top ===== */
        .scroll-top {
            position: fixed;
            bottom: 32px;
            right: 32px;
            width: 40px;
            height: 40px;
            background: rgba(255, 255, 255, 0.9);
            border-radius: 10px;
            box-shadow: var(--shadow-float);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--color-primary);
            font-size: 18px;
            cursor: pointer;
            opacity: 0;
            visibility: hidden;
            transition: var(--transition-base);
            z-index: 999;
        }
        .scroll-top.show {
            opacity: 1;
            visibility: visible;
        }
        .scroll-top:hover {
            background: #fff;
            color: var(--color-primary-dark);
            transform: translateY(-3px);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1200px) {
            .container { padding-left: 24px; padding-right: 24px; }
            .hero h1 { font-size: 36px; }
            .case-track { grid-template-columns: repeat(4, 340px); overflow-x: auto; }
            .case-scroll { margin-right: -24px; padding-right: 24px; }
            .pricing-compare { flex-basis: 30%; }
        }

        @media (max-width: 992px) {
            .header-inner { height: auto; padding: 12px 0; flex-wrap: wrap; }
            .nav-chip-wrap { display: none; }
            .mobile-toggle { display: flex; margin-left: auto; }
            .header-cta .btn { display: none; }
            .mobile-nav.show { display: block; }

            .hero { padding: 60px 0; }
            .hero .container { flex-direction: column; gap: 40px; }
            .hero-left { flex: none; max-width: 100%; }
            .hero-right { flex: none; max-width: 100%; }

            .features-grid { grid-template-columns: 1fr 1fr; max-width: 100%; }
            .feature-card.offset-right { margin-right: 0; }
            .feature-card.offset-left { margin-left: 0; }

            .scenario-block { gap: 32px; padding: 24px 0; }
            .scenario-image { max-width: 420px; }

            .pricing-wrapper { flex-direction: column; }
            .pricing-compare { border-right: none; border-bottom: 1px solid var(--color-border); }
            .pricing-tiers { grid-template-columns: repeat(3, 1fr); }

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

            .contact-card { flex-direction: column; padding: 32px; }
            .contact-info { width: 100%; }
            .contact-form { width: 100%; }
        }

        @media (max-width: 768px) {
            .section { padding: var(--space-section-mobile) 0; }
            .section-header h2 { font-size: 24px; }
            .features-grid { grid-template-columns: 1fr; gap: 16px; }
            .scenario-block { flex-direction: column !important; gap: 24px; padding: 16px 0; }
            .scenario-image { max-width: 100%; }
            .pricing-tiers { grid-template-columns: 1fr; }
            .price-card { border-left: none; border-top: 1px solid var(--color-border); }
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .hero-stats { gap: 24px; }
            .hero-stat .num { font-size: 22px; }
            .cta-banner { padding: 32px 24px; }
        }

        @media (max-width: 576px) {
            .container { padding-left: 16px; padding-right: 16px; }
            .hero { padding: 48px 0; }
            .hero h1 { font-size: 28px; }
            .hero-sub { font-size: 14px; }
            .hero-actions { flex-direction: column; align-items: flex-start; gap: 16px; }
            .hero-actions .btn { width: 100%; }
            .hero-stats { flex-wrap: wrap; gap: 20px; }

            .section-header { margin-bottom: 24px; }
            .section-header h2 { font-size: 22px; }
            .section-sub { padding-left: 14px; font-size: 13px; margin-bottom: 24px; }

            .feature-card { padding: 16px; }
            .feature-icon { width: 40px; height: 40px; font-size: 16px; }

            .case-track { grid-template-columns: repeat(4, 280px); gap: 16px; }
            .case-scroll { margin-right: -16px; padding-right: 16px; }

            .news-main-card .news-img { height: 160px; }
            .news-main-body { padding: 16px; }
            .news-small-item .thumb { width: 56px; height: 56px; min-width: 56px; }
            .news-small-item { padding: 12px; }

            .cta-banner { padding: 28px 20px; }
            .cta-banner h3 { font-size: 18px; }
            .cta-banner .btn { width: 100%; }

            .contact-card { padding: 24px; }
            .btn-lg { height: 48px; padding: 0 28px; font-size: 15px; }

            .scroll-top { bottom: 20px; right: 20px; }
            .nav-chip-mobile .badge-official { display: inline-block; margin-left: 6px; }
        }

        @media (max-width: 400px) {
            .logo-text { font-size: 17px; }
            .hero h1 { font-size: 25px; }
            .pricing-compare { padding: 24px 20px; }
            .price-card { padding: 24px 20px; }
        }

/* roulang page: category1 */
:root {
  --color-primary: #4A90D9;
  --color-primary-dark: #3A76B5;
  --color-primary-light: #8AB8E8;
  --color-accent: #00B386;
  --color-bg: #F5F8FB;
  --color-bg-alt: #EDF3F8;
  --color-card: #FFFFFF;
  --color-text: #1A2430;
  --color-text-body: #4A5568;
  --color-text-light: #8A94A6;
  --color-border: #E2E9F0;
  --radius-card: 12px;
  --radius-btn: 8px;
  --radius-chip: 6px;
  --shadow-sm: 0 2px 8px rgba(74,144,217,0.08);
  --shadow-hover: 0 8px 24px rgba(74,144,217,0.15);
  --container-width: 1240px;
  --section-space: 80px;
  --font-main: -apple-system, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
}
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: var(--font-main);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text-body);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}
img {
  max-width: 100%;
  display: block;
}
a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color .25s ease;
}
ul {
  list-style: none;
}
button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}
input,
select,
textarea {
  font-family: inherit;
}
.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 32px;
}
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 44px;
  padding: 0 24px;
  border-radius: var(--radius-btn);
  background: var(--color-primary);
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  border: 1px solid var(--color-primary);
  transition: all .25s ease;
}
.btn-primary:hover {
  background: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  color: #fff;
}
.btn-primary:active {
  transform: translateY(1px);
}
.btn-primary:focus-visible {
  outline: 2px solid rgba(74,144,217,0.4);
  outline-offset: 2px;
}
.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 44px;
  padding: 0 24px;
  border-radius: var(--radius-btn);
  background: #fff;
  color: var(--color-primary);
  font-size: 15px;
  font-weight: 600;
  border: 1px solid var(--color-primary);
  transition: all .25s ease;
}
.btn-secondary:hover {
  background: rgba(74,144,217,0.05);
  color: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
}
.btn-text {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--color-primary);
  font-size: 15px;
  font-weight: 600;
  background: none;
  padding: 6px 0;
  border: none;
}
.btn-text i {
  transition: transform .25s ease;
}
.btn-text:hover {
  color: var(--color-primary-dark);
}
.btn-text:hover i {
  transform: translateX(4px);
}
/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,0.96);
  backdrop-filter: blur(4px);
  border-bottom: 1px solid var(--color-border);
  box-shadow: 0 2px 8px rgba(74,144,217,0.06);
}
.header-inner {
  display: flex;
  align-items: center;
  gap: 24px;
  min-height: 72px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}
.brand-name {
  font-size: 22px;
  font-weight: 800;
  color: var(--color-text);
  letter-spacing: -0.5px;
}
.brand-name span {
  color: var(--color-primary);
}
.logo-badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  background: rgba(74,144,217,0.1);
  color: var(--color-primary);
  border-radius: var(--radius-chip);
  font-size: 12px;
  font-weight: 700;
  line-height: 1.4;
}
.nav-chip-wrap {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: auto;
}
.nav-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: 999px;
  background: transparent;
  border: 1px solid var(--color-border);
  color: var(--color-text-body);
  font-size: 14px;
  font-weight: 500;
  transition: all .25s ease;
  white-space: nowrap;
}
.nav-chip i {
  font-size: 14px;
}
.nav-chip:hover {
  background: rgba(74,144,217,0.08);
  border-color: transparent;
  color: var(--color-primary);
}
.nav-chip.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}
.header-cta {
  margin-left: 8px;
  flex-shrink: 0;
}
.nav-mobile-cta {
  display: none;
}
.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  color: var(--color-text);
  border-radius: var(--radius-btn);
  background: none;
  border: 1px solid var(--color-border);
  margin-left: auto;
  transition: all .25s ease;
}
.nav-toggle:hover {
  background: rgba(74,144,217,0.08);
  border-color: transparent;
}
/* Page Hero */
.page-hero {
  position: relative;
  padding: 64px 0 56px;
  background-image: linear-gradient(rgba(245,248,251,0.92), rgba(245,248,251,0.92)), url('/assets/images/backpic/back-1.webp');
  background-size: cover;
  background-position: center;
  border-bottom: 1px solid var(--color-border);
}
.page-hero .container {
  position: relative;
  z-index: 2;
}
.breadcrumb {
  font-size: 13px;
  color: var(--color-text-light);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}
.breadcrumb a {
  color: var(--color-text-light);
}
.breadcrumb a:hover {
  color: var(--color-primary);
}
.breadcrumb .sep {
  color: #C3CEDC;
}
.breadcrumb .current {
  color: var(--color-text-body);
}
.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  background: rgba(0,179,134,0.1);
  color: var(--color-accent);
  font-size: 13px;
  font-weight: 600;
  border-radius: 999px;
  margin-bottom: 16px;
}
.page-hero h1 {
  font-size: 30px;
  font-weight: 800;
  color: var(--color-text);
  line-height: 1.3;
  letter-spacing: 0.5px;
  margin-bottom: 12px;
}
.hero-desc {
  font-size: 15px;
  color: var(--color-text-body);
  max-width: 560px;
  margin-bottom: 26px;
}
.hero-actions {
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
}
/* Sections */
.section {
  padding: var(--section-space) 0;
}
.section-alt {
  background: var(--color-bg-alt);
}
.section-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 36px;
}
.section-bar {
  display: inline-block;
  width: 2px;
  height: 24px;
  background: var(--color-accent);
  flex-shrink: 0;
}
.section-head h2 {
  font-size: 28px;
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.3;
}
/* Split Card */
.split-card {
  display: grid;
  grid-template-columns: 6fr 5fr;
  background: var(--color-card);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  align-items: stretch;
  transition: box-shadow .25s ease;
}
.split-card:hover {
  box-shadow: var(--shadow-hover);
}
.split-media {
  min-height: 320px;
}
.split-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.split-body {
  padding: 40px 36px 40px 28px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
}
.split-body p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-text-body);
  margin-bottom: 20px;
}
.check-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 24px;
}
.check-list li {
  position: relative;
  padding-left: 28px;
  font-size: 14px;
  color: var(--color-text-body);
}
.check-list li::before {
  content: "\f00c";
  font-family: "Font Awesome 6 Free";
  font-weight: 900;
  position: absolute;
  left: 0;
  top: 1px;
  width: 18px;
  height: 18px;
  background: rgba(0,179,134,0.12);
  color: var(--color-accent);
  border-radius: 50%;
  font-size: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
}
/* Data Grid */
.data-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.data-card {
  background: var(--color-card);
  border-radius: var(--radius-card);
  padding: 36px 24px 32px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(255,255,255,0);
  transition: all .25s ease;
}
.data-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
}
.data-num {
  font-family: "SF Mono", Consolas, monospace;
  font-size: 32px;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.2;
}
.data-num span {
  font-size: 22px;
  color: var(--color-primary-light);
}
.data-label {
  font-size: 14px;
  color: var(--color-text-light);
  margin-top: 10px;
}
/* Scene Grid */
.scene-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.scene-card {
  display: block;
  background: var(--color-card);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  text-align: center;
  padding-bottom: 20px;
  transition: all .25s ease;
  color: var(--color-text);
}
.scene-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
  color: var(--color-text);
}
.scene-img {
  position: relative;
  aspect-ratio: 1;
  overflow: hidden;
}
.scene-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .4s ease;
}
.scene-overlay {
  position: absolute;
  inset: 0;
  background: rgba(74,144,217,0.28);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity .3s ease;
}
.scene-overlay i {
  color: #fff;
  font-size: 24px;
}
.scene-card:hover .scene-overlay {
  opacity: 1;
}
.scene-card:hover .scene-img img {
  transform: scale(1.05);
}
.scene-card h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text);
  margin-top: 16px;
  margin-bottom: 6px;
}
.scene-card p {
  font-size: 13px;
  color: var(--color-text-light);
  padding: 0 16px;
  line-height: 1.6;
}
/* Steps */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  counter-reset: step;
}
.step-card {
  background: var(--color-card);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-sm);
  padding: 28px 24px 26px;
  position: relative;
  border-top: 3px solid transparent;
  transition: all .25s ease;
}
.step-card:hover {
  border-top-color: var(--color-accent);
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
}
.step-num {
  font-family: "SF Mono", Consolas, monospace;
  font-size: 24px;
  font-weight: 700;
  color: var(--color-primary-light);
  line-height: 1.2;
  margin-bottom: 12px;
  display: block;
}
.step-card h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 8px;
}
.step-card p {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
}
/* FAQ */
.faq-wrap {
  max-width: 880px;
  margin: 0 auto;
}
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.faq-item {
  background: var(--color-card);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-sm);
  border-left: 3px solid transparent;
  overflow: hidden;
  transition: all .3s ease;
}
.faq-item.active {
  border-left-color: var(--color-primary);
  box-shadow: var(--shadow-hover);
}
.faq-question {
  display: flex;
  align-items: center;
  gap: 14px;
  width: 100%;
  padding: 20px 24px;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
  text-align: left;
  background: none;
  transition: background .25s ease;
}
.faq-question:hover {
  background: rgba(74,144,217,0.04);
}
.faq-q {
  flex-shrink: 0;
  width: 26px;
  height: 26px;
  border-radius: 6px;
  background: var(--color-primary);
  color: #fff;
  font-size: 13px;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.faq-arrow {
  margin-left: auto;
  color: var(--color-text-light);
  font-size: 14px;
  transition: transform .3s ease, color .3s ease;
}
.faq-item.active .faq-arrow {
  transform: rotate(180deg);
  color: var(--color-primary);
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height .35s ease;
}
.faq-item.active .faq-answer {
  max-height: 600px;
}
.faq-answer p {
  padding: 0 24px 22px 64px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--color-text-body);
}
/* CTA */
.cta-section {
  padding: 72px 0 80px;
}
.cta-card {
  background: #EAF2FB;
  border: 1px solid rgba(74,144,217,0.2);
  border-radius: 16px;
  padding: 48px 40px;
  text-align: center;
}
.cta-card h2 {
  font-size: 22px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 12px;
}
.cta-card p {
  font-size: 15px;
  color: var(--color-text-body);
  max-width: 640px;
  margin: 0 auto 28px;
  line-height: 1.8;
}
.cta-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}
.cta-contact {
  margin-top: 22px;
  display: flex;
  justify-content: center;
  gap: 28px;
  flex-wrap: wrap;
  font-size: 14px;
  color: var(--color-text-light);
}
.cta-contact i {
  color: var(--color-primary);
  margin-right: 6px;
}
/* Footer */
.site-footer {
  background: #132536;
  color: #AEBAC9;
  padding: 64px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding-bottom: 48px;
}
.footer-brand .logo-text {
  font-size: 22px;
  font-weight: 800;
  color: #fff;
}
.footer-brand .logo-text span {
  color: var(--color-primary-light);
}
.footer-brand p {
  margin-top: 14px;
  font-size: 13px;
  line-height: 1.8;
  color: #8A9BAD;
  max-width: 280px;
}
.footer-col h4 {
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 18px;
}
.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer-col ul li {
  font-size: 14px;
}
.footer-col ul li a {
  color: #AEBAC9;
  transition: color .25s ease;
}
.footer-col ul li a:hover {
  color: #fff;
}
.footer-contact li {
  color: #AEBAC9;
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 14px;
}
.footer-contact i {
  color: var(--color-primary-light);
  margin-top: 4px;
  width: 16px;
  text-align: center;
}
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding: 22px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  font-size: 13px;
  color: #7C8A9B;
}
/* Responsive */
@media (max-width: 1199px) {
  .container {
    padding: 0 24px;
  }
  .split-card {
    grid-template-columns: 1fr 1fr;
  }
  .split-body {
    padding: 32px 28px;
  }
}
@media (max-width: 991px) {
  .nav-toggle {
    display: inline-flex;
  }
  .header-cta {
    display: none;
  }
  .nav-chip-wrap {
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    gap: 8px;
    background: #fff;
    padding: 16px;
    border-bottom: 1px solid var(--color-border);
    box-shadow: 0 16px 32px rgba(74,144,217,0.12);
    border-radius: 0 0 12px 12px;
    margin: 0;
  }
  .nav-chip-wrap.nav-open {
    display: flex;
  }
  .nav-chip {
    width: 100%;
    justify-content: flex-start;
    border-radius: var(--radius-btn);
    border-color: transparent;
    background: transparent;
  }
  .nav-chip:hover {
    background: rgba(74,144,217,0.08);
  }
  .nav-chip.active {
    background: rgba(74,144,217,0.1);
    color: var(--color-primary);
    border-color: transparent;
  }
  .nav-mobile-cta {
    display: inline-flex;
    width: 100%;
    justify-content: center;
    margin-top: 8px;
  }
  .scene-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }
  .steps-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }
  .data-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
  }
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
  }
  .faq-answer p {
    padding-left: 24px;
  }
}
@media (max-width: 767px) {
  :root {
    --section-space: 56px;
  }
  .container {
    padding: 0 20px;
  }
  .page-hero {
    padding: 44px 0 40px;
  }
  .page-hero h1 {
    font-size: 28px;
  }
  .section-head h2 {
    font-size: 24px;
  }
  .split-card {
    grid-template-columns: 1fr;
  }
  .split-media {
    min-height: 220px;
  }
  .split-body {
    padding: 28px 22px;
  }
  .data-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .data-card {
    padding: 28px 20px;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .cta-card {
    padding: 36px 24px;
  }
}
@media (max-width: 575px) {
  .container {
    padding: 0 16px;
  }
  .header-inner {
    gap: 12px;
  }
  .brand-name {
    font-size: 20px;
  }
  .logo-badge {
    padding: 2px 8px;
    font-size: 11px;
  }
  .page-hero h1 {
    font-size: 22px;
  }
  .hero-desc {
    font-size: 14px;
  }
  .hero-actions {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }
  .scene-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .steps-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .section-head h2 {
    font-size: 22px;
  }
  .split-card {
    border-radius: 10px;
  }
  .cta-card {
    border-radius: 12px;
  }
  .cta-actions {
    flex-direction: column;
    align-items: stretch;
  }
  .cta-actions .btn-primary,
  .cta-actions .btn-secondary {
    width: 100%;
  }
  .footer-col h4 {
    margin-bottom: 14px;
  }
}

/* roulang page: article */
/* ============ 设计变量 ============ */
:root {
    --color-primary: #4A90D9;
    --color-primary-dark: #3A76B5;
    --color-primary-light: #8AB8E8;
    --color-primary-soft: rgba(74, 144, 217, 0.1);
    --color-accent: #00B386;
    --color-bg: #F5F8FB;
    --color-bg-deep: #EDF3F8;
    --color-card: #FFFFFF;
    --color-text: #1A2430;
    --color-text-body: #4A5568;
    --color-text-light: #8A94A6;
    --color-border: #E2E9F0;
    --color-footer: #132536;
    --color-danger: #E5484D;
    --color-warning: #F5A623;
    --radius-card: 12px;
    --radius-btn: 8px;
    --radius-chip: 6px;
    --shadow-card: 0 2px 8px rgba(74, 144, 217, 0.08);
    --shadow-hover: 0 8px 24px rgba(74, 144, 217, 0.15);
    --container-w: 1240px;
    --section-pad: 80px;
    --header-h: 72px;
    --font-main: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
    --font-num: "SF Mono", Consolas, "Courier New", monospace;
    --transition: all .25s ease;
}

/* ============ 基础 Reset ============ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
    font-family: var(--font-main);
    font-size: 16px;
    line-height: 1.7;
    color: var(--color-text-body);
    background: var(--color-bg);
    -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; transition: var(--transition); }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input, textarea { font-family: inherit; }
::selection { background: rgba(74, 144, 217, 0.2); }
a:focus-visible, button:focus-visible, .btn:focus-visible {
    outline: 2px solid rgba(74, 144, 217, 0.4);
    outline-offset: 2px;
}

.container { max-width: var(--container-w); margin: 0 auto; padding: 0 32px; }

/* ============ 按钮 ============ */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 8px;
    height: 44px; padding: 0 24px; border-radius: var(--radius-btn);
    font-size: 15px; font-weight: 600; transition: var(--transition);
    white-space: nowrap;
}
.btn-primary { background: var(--color-primary); color: #fff; }
.btn-primary:hover { background: var(--color-primary-dark); }
.btn-primary:active { transform: translateY(1px); }

/* ============ 顶部导航 ============ */
.site-header {
    position: sticky; top: 0; z-index: 100;
    background: rgba(255, 255, 255, 0.96);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--color-border);
}
.header-inner {
    display: flex; align-items: center; justify-content: space-between;
    gap: 24px; height: var(--header-h);
}
.brand { display: flex; align-items: center; gap: 8px; flex-shrink: 0; }
.logo-text { font-size: 22px; font-weight: 800; color: var(--color-text); letter-spacing: .5px; }
.logo-text span { color: var(--color-primary); }
.nav-chip-wrap {
    display: flex; align-items: center; justify-content: center;
    gap: 8px; flex: 1; flex-wrap: wrap;
}
.nav-chip {
    display: inline-flex; align-items: center; gap: 6px;
    padding: 8px 16px; border-radius: 999px;
    font-size: 14px; font-weight: 500; color: var(--color-text-body);
    border: 1px solid var(--color-border); background: transparent;
    transition: var(--transition); white-space: nowrap;
}
.nav-chip i { font-size: 13px; opacity: .8; }
.nav-chip:hover { background: var(--color-bg-deep); border-color: transparent; color: var(--color-primary); }
.nav-chip.active { background: var(--color-primary); border-color: var(--color-primary); color: #fff; }
.header-actions { display: flex; align-items: center; gap: 16px; flex-shrink: 0; }
.nav-cta { height: 40px; padding: 0 20px; }
.nav-mobile-cta { display: none; margin-top: 12px; width: 100%; }

/* 汉堡按钮 */
.nav-toggle {
    display: none; flex-direction: column; justify-content: center; gap: 5px;
    width: 40px; height: 40px; padding: 8px;
    border-radius: var(--radius-btn); background: var(--color-bg-deep);
}
.nav-toggle .bar { display: block; width: 100%; height: 2px; background: var(--color-text); border-radius: 2px; transition: var(--transition); }
.nav-toggle.open .bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open .bar:nth-child(2) { opacity: 0; }
.nav-toggle.open .bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ============ 面包屑 ============ */
.breadcrumb { padding: 18px 0 8px; }
.breadcrumb .container { display: flex; align-items: center; flex-wrap: wrap; gap: 6px; font-size: 13px; color: var(--color-text-light); }
.breadcrumb a { color: var(--color-text-light); display: inline-flex; align-items: center; gap: 6px; }
.breadcrumb a:hover { color: var(--color-primary); }
.bc-sep { color: #C0C8D4; margin: 0 4px; }
.bc-current { color: var(--color-text); max-width: 320px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* ============ 文章页主区块 ============ */
.article-page { padding-bottom: var(--section-pad); }
.article-card {
    background: var(--color-card); border-radius: var(--radius-card);
    box-shadow: var(--shadow-card); padding: 48px;
    max-width: 920px; margin: 24px auto 0;
}
.article-header h1 {
    font-size: 28px; font-weight: 700; color: var(--color-text);
    line-height: 1.4; letter-spacing: .5px; margin-bottom: 16px;
}
.article-meta {
    display: flex; flex-wrap: wrap; gap: 24px;
    font-size: 13px; color: var(--color-text-light); margin-bottom: 28px;
}
.meta-item { display: inline-flex; align-items: center; }
.meta-item i { margin-right: 6px; color: var(--color-primary); }
.article-cover { border-radius: var(--radius-card); overflow: hidden; margin-bottom: 36px; aspect-ratio: 16 / 7; }
.article-cover img { width: 100%; height: 100%; object-fit: cover; }

/* ============ 正文排版 ============ */
.article-body { max-width: 720px; margin: 0 auto; font-size: 16px; line-height: 1.8; color: #2D2D2D; }
.article-body p { margin-bottom: 20px; }
.article-body h2 {
    font-size: 22px; font-weight: 700; color: var(--color-text);
    margin: 36px 0 16px; padding-left: 12px;
    border-left: 3px solid var(--color-primary);
}
.article-body h3 { font-size: 18px; font-weight: 700; color: var(--color-text); margin: 32px 0 12px; }
.article-body blockquote {
    border-left: 3px solid var(--color-primary); background: var(--color-bg-deep);
    padding: 16px 20px; border-radius: 0 8px 8px 0; color: #555; margin: 24px 0;
}
.article-body blockquote p { margin-bottom: 0; }
.article-body a { color: var(--color-primary); text-decoration: underline; }
.article-body a:hover { color: var(--color-primary-dark); }
.article-body img { max-width: 100%; height: auto; border-radius: 8px; margin: 24px auto; }
.article-body ul { margin-bottom: 20px; }
.article-body ul li { position: relative; padding-left: 20px; margin-bottom: 8px; }
.article-body ul li::before {
    content: ''; position: absolute; left: 2px; top: 10px;
    width: 8px; height: 8px; border: 2px solid var(--color-primary); border-radius: 50%;
}
.article-body ol { margin-bottom: 20px; padding-left: 20px; list-style: decimal; }
.article-body ol li { margin-bottom: 8px; }
.article-body figure { margin: 24px 0; text-align: center; }
.article-body figcaption { font-size: 13px; color: var(--color-text-light); margin-top: 8px; }

/* ============ 标签与分享 ============ */
.article-tags {
    display: flex; flex-wrap: wrap; gap: 8px;
    max-width: 720px; margin: 40px auto 0;
    padding-top: 24px; border-top: 1px solid var(--color-border);
}
.tag {
    display: inline-block; padding: 6px 14px; border-radius: 999px;
    background: #F1F4F8; font-size: 12px; color: var(--color-text-body);
    transition: var(--transition);
}
.tag:hover { background: var(--color-primary-soft); color: var(--color-primary); }
.article-share { display: flex; align-items: center; flex-wrap: wrap; gap: 12px; max-width: 720px; margin: 24px auto 0; }
.article-share span { font-size: 14px; color: var(--color-text-light); }
.share-btn {
    display: inline-flex; align-items: center; gap: 6px;
    height: 36px; padding: 0 16px; border-radius: var(--radius-btn);
    background: var(--color-bg-deep); font-size: 13px; color: var(--color-text-body);
    transition: var(--transition);
}
.share-btn:hover { background: var(--color-primary); color: #fff; }
.share-btn i { font-size: 14px; }

/* ============ 未找到状态 ============ */
.article-not-found {
    max-width: 720px; margin: 40px auto 80px;
    background: var(--color-card); border-radius: var(--radius-card);
    box-shadow: var(--shadow-card); padding: 64px 32px; text-align: center;
}
.article-not-found i { font-size: 48px; color: var(--color-primary-light); margin-bottom: 16px; }
.article-not-found p { font-size: 18px; color: var(--color-text); margin-bottom: 24px; }

/* ============ 相关阅读 ============ */
.related-section { margin-top: var(--section-pad); }
.related-head { display: flex; align-items: center; gap: 12px; margin-bottom: 32px; }
.related-head::before {
    content: ''; width: 3px; height: 22px;
    background: var(--color-accent); border-radius: 2px;
}
.related-head h2 { font-size: 26px; font-weight: 700; color: var(--color-text); }
.related-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.related-card {
    display: block; background: var(--color-card);
    border-radius: var(--radius-card); overflow: hidden;
    box-shadow: var(--shadow-card); transition: var(--transition);
}
.related-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.related-img { aspect-ratio: 16 / 9; overflow: hidden; }
.related-img img { width: 100%; height: 100%; object-fit: cover; }
.related-card-body { padding: 20px; }
.related-card-body h3 {
    font-size: 16px; font-weight: 600; color: var(--color-text);
    line-height: 1.5; white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
    margin-bottom: 10px;
}
.related-date { font-size: 12px; color: var(--color-text-light); }
.back-to-list {
    display: inline-flex; align-items: center; gap: 8px;
    margin-top: 36px; font-size: 14px; font-weight: 600; color: var(--color-primary);
}
.back-to-list:hover { color: var(--color-primary-dark); }
.back-to-list i { transition: transform .25s ease; }
.back-to-list:hover i { transform: translateX(-4px); }

/* ============ CTA 通栏 ============ */
.cta-section { padding-top: var(--section-pad); }
.cta-box {
    background: var(--color-bg-deep);
    border: 1px solid rgba(74, 144, 217, 0.2);
    border-radius: 16px; padding: 56px 32px; text-align: center;
}
.cta-box h2 { font-size: 24px; font-weight: 700; color: var(--color-text); margin-bottom: 10px; }
.cta-box p { font-size: 14px; color: var(--color-text-light); margin-bottom: 28px; }

/* ============ 页脚 ============ */
.site-footer { background: var(--color-footer); padding: 64px 0 0; margin-top: 0; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.4fr; gap: 40px; padding-bottom: 48px; }
.footer-brand .logo-text { color: #fff; }
.footer-brand p { font-size: 13px; line-height: 1.8; margin-top: 16px; color: rgba(255, 255, 255, 0.55); }
.footer-col h4 { font-size: 15px; font-weight: 600; color: #fff; margin-bottom: 18px; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col a { font-size: 13px; color: rgba(255, 255, 255, 0.6); }
.footer-col a:hover { color: #fff; }
.footer-contact li {
    font-size: 13px; color: rgba(255, 255, 255, 0.6);
    margin-bottom: 10px; display: flex; align-items: center; gap: 10px;
}
.footer-contact i { color: var(--color-primary-light); }
.footer-bottom {
    display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: 20px 0; font-size: 13px; color: rgba(255, 255, 255, 0.45);
}

/* ============ 回到顶部 / Toast ============ */
.back-top {
    position: fixed; right: 24px; bottom: 32px; z-index: 90;
    width: 44px; height: 44px; border-radius: var(--radius-btn);
    background: var(--color-primary); color: #fff;
    box-shadow: 0 4px 16px rgba(74, 144, 217, 0.35);
    opacity: 0; visibility: hidden; transform: translateY(12px);
    transition: var(--transition);
}
.back-top.show { opacity: 1; visibility: visible; transform: translateY(0); }
.back-top:hover { background: var(--color-primary-dark); }
.toast {
    position: fixed; left: 50%; bottom: 48px; z-index: 200;
    transform: translateX(-50%) translateY(16px);
    background: var(--color-text); color: #fff;
    padding: 10px 20px; border-radius: 999px; font-size: 13px;
    opacity: 0; visibility: hidden; transition: var(--transition);
}
.toast.show { opacity: 1; visibility: visible; transform: translateX(-50%) translateY(0); }

/* ============ 响应式断点 ============ */
@media (max-width: 1199px) {
    .related-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 991px) {
    :root { --section-pad: 56px; }
    .container { padding: 0 24px; }
    .nav-chip-wrap {
        display: none;
        position: absolute; top: var(--header-h); left: 0; right: 0;
        background: #fff; padding: 20px 24px;
        box-shadow: 0 12px 32px rgba(26, 36, 48, 0.1);
        flex-direction: column; align-items: stretch;
        border-bottom: 1px solid var(--color-border);
    }
    .nav-chip-wrap.open { display: flex; }
    .nav-chip { border-radius: var(--radius-btn); padding: 12px 16px; }
    .nav-chip.active { background: var(--color-bg-deep); color: var(--color-primary); border-color: transparent; }
    .nav-toggle { display: flex; }
    .nav-cta { display: none; }
    .nav-mobile-cta { display: flex; }
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
    .article-card { padding: 32px; }
}

@media (max-width: 767px) {
    .related-grid { grid-template-columns: repeat(2, 1fr); }
    .article-card { padding: 24px 16px; }
    .article-header h1 { font-size: 26px; }
    .cta-box { padding: 40px 24px; }
}

@media (max-width: 575px) {
    .container { padding: 0 16px; }
    .related-grid { grid-template-columns: 1fr; }
    .article-card { border-radius: 10px; margin-top: 16px; }
    .article-header h1 { font-size: 24px; }
    .article-meta { gap: 12px; }
    .article-cover { border-radius: 8px; }
    .footer-grid { grid-template-columns: 1fr; }
    .back-top { right: 16px; bottom: 20px; }
    .cta-box { padding: 40px 20px; }
    .cta-box h2 { font-size: 20px; }
    .article-share { gap: 8px; }
}

/* roulang page: category2 */
/* ===== 设计变量 ===== */
        :root {
            --color-primary: #4A90D9;
            --color-primary-dark: #3A76B5;
            --color-primary-light: #8AB8E8;
            --color-primary-bg: rgba(74, 144, 217, .08);
            --color-accent: #00B386;
            --color-bg: #F5F8FB;
            --color-bg-deep: #EDF3F8;
            --color-card: #FFFFFF;
            --color-text: #1A2430;
            --color-body: #4A5568;
            --color-muted: #8A94A6;
            --color-border: #E2E9F0;
            --color-footer: #132536;
            --radius-card: 12px;
            --radius-btn: 8px;
            --radius-chip: 6px;
            --shadow-card: 0 2px 8px rgba(74, 144, 217, .08);
            --shadow-hover: 0 8px 24px rgba(74, 144, 217, .15);
            --transition: all .25s ease;
            --container: 1240px;
            --font-base: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
            --font-num: "SF Mono", Consolas, "Courier New", monospace;
        }

        /* ===== Reset / Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            margin: 0;
            font-family: var(--font-base);
            font-size: 16px;
            line-height: 1.7;
            color: var(--color-body);
            background: var(--color-bg);
            -webkit-font-smoothing: antialiased;
        }
        h1,
        h2,
        h3,
        h4,
        p,
        ul,
        figure {
            margin: 0;
        }
        ul {
            padding: 0;
            list-style: none;
        }
        a {
            color: var(--color-primary);
            text-decoration: none;
            transition: var(--transition);
        }
        img {
            max-width: 100%;
            display: block;
        }
        button {
            font-family: inherit;
        }
        input,
        textarea,
        select {
            font-family: inherit;
        }

        /* ===== 容器 ===== */
        .container {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 32px;
        }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            height: 44px;
            padding: 0 24px;
            border-radius: var(--radius-btn);
            font-size: 14px;
            font-weight: 600;
            text-decoration: none;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            font-family: inherit;
            line-height: 1;
            white-space: nowrap;
        }
        .btn-primary {
            background: var(--color-primary);
            color: #fff !important;
        }
        .btn-primary:hover {
            background: var(--color-primary-dark);
            box-shadow: 0 6px 16px rgba(74, 144, 217, .25);
        }
        .btn-primary:active {
            transform: translateY(1px);
        }
        .btn-primary:focus-visible {
            outline: 2px solid rgba(74, 144, 217, .4);
            outline-offset: 2px;
        }
        .btn-outline {
            background: #fff;
            color: var(--color-primary) !important;
            border: 1px solid var(--color-primary);
        }
        .btn-outline:hover {
            background: rgba(74, 144, 217, .05);
        }
        .btn-outline:focus-visible {
            outline: 2px solid rgba(74, 144, 217, .4);
            outline-offset: 2px;
        }

        /* ===== Header / 导航 ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, .96);
            border-bottom: 1px solid var(--color-border);
            box-shadow: 0 1px 8px rgba(74, 144, 217, .05);
        }
        .header-inner {
            display: flex;
            align-items: center;
            gap: 20px;
            min-height: 68px;
        }
        .logo {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            text-decoration: none;
            flex-shrink: 0;
        }
        .logo-text {
            font-size: 20px;
            font-weight: 800;
            color: var(--color-text);
            letter-spacing: .5px;
        }
        .logo-text span {
            color: var(--color-primary);
        }
        .logo-badge {
            font-size: 11px;
            font-weight: 600;
            color: var(--color-primary);
            background: rgba(74, 144, 217, .1);
            padding: 2px 6px;
            border-radius: var(--radius-chip);
            line-height: 1.5;
        }
        .nav-chip-wrap {
            display: flex;
            align-items: center;
            gap: 8px;
            margin-left: auto;
            margin-right: auto;
        }
        .nav-chip {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 16px;
            border-radius: 20px;
            font-size: 14px;
            font-weight: 500;
            color: var(--color-body);
            background: transparent;
            border: 1px solid var(--color-border);
            transition: var(--transition);
            text-decoration: none;
            white-space: nowrap;
        }
        .nav-chip i {
            font-size: 14px;
        }
        .nav-chip:hover {
            background: rgba(74, 144, 217, .08);
            border-color: transparent;
            color: var(--color-primary);
        }
        .nav-chip.active {
            background: var(--color-primary);
            color: #fff;
            border-color: var(--color-primary);
        }
        .nav-chip.active:hover {
            background: var(--color-primary-dark);
            color: #fff;
        }
        .header-cta {
            flex-shrink: 0;
        }
        .mobile-cta {
            display: none;
        }
        .nav-toggle {
            display: none;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: transparent;
            border: 1px solid var(--color-border);
            border-radius: var(--radius-btn);
            color: var(--color-text);
            font-size: 16px;
            cursor: pointer;
            transition: var(--transition);
            flex-shrink: 0;
        }
        .nav-toggle:hover {
            background: rgba(74, 144, 217, .06);
            color: var(--color-primary);
        }

        /* ===== 分类页 Banner ===== */
        .page-banner {
            position: relative;
            background: var(--color-bg-deep);
            padding: 64px 0 88px;
            text-align: center;
            overflow: hidden;
        }
        .page-banner::before {
            content: "";
            position: absolute;
            top: -180px;
            left: 50%;
            transform: translateX(-50%);
            width: 600px;
            height: 400px;
            background: radial-gradient(ellipse at center, rgba(74, 144, 217, .08) 0%, transparent 70%);
            pointer-events: none;
        }
        .banner-inner {
            position: relative;
            z-index: 2;
        }
        .banner-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            font-weight: 600;
            color: var(--color-primary);
            background: rgba(74, 144, 217, .08);
            padding: 6px 14px;
            border-radius: 20px;
            margin-bottom: 20px;
        }
        .banner-inner h1 {
            font-size: 24px;
            font-weight: 800;
            line-height: 1.4;
            letter-spacing: .5px;
            color: var(--color-text);
            margin-bottom: 12px;
        }
        .banner-inner .banner-desc {
            font-size: 14px;
            color: var(--color-body);
            max-width: 460px;
            margin: 0 auto;
        }
        .banner-actions {
            display: flex;
            gap: 16px;
            justify-content: center;
            margin-top: 28px;
            flex-wrap: wrap;
        }

        /* ===== 板块通用 ===== */
        section {
            padding: 80px 0;
        }
        .section-head {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 40px;
        }
        .section-head::before {
            content: "";
            width: 3px;
            height: 24px;
            background: var(--color-primary);
            border-radius: 2px;
            flex-shrink: 0;
        }
        .section-head h2 {
            font-size: 28px;
            font-weight: 700;
            color: var(--color-text);
            line-height: 1.3;
        }

        /* ===== 场景段落（交替图文） ===== */
        .section-scene {
            background: var(--color-bg);
        }
        .scene-list {
            display: flex;
            flex-direction: column;
            gap: 64px;
        }
        .scene-row {
            display: grid;
            grid-template-columns: 6fr 5fr;
            gap: 48px;
            align-items: center;
        }
        .scene-row.reverse .scene-img {
            order: 2;
        }
        .scene-row.reverse .scene-text {
            order: 1;
        }
        .scene-img {
            overflow: hidden;
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
        }
        .scene-img img {
            width: 100%;
            aspect-ratio: 4/3;
            object-fit: cover;
            transition: transform .4s ease;
        }
        .scene-row:hover .scene-img img {
            transform: scale(1.02);
        }
        .scene-step {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 1px;
            color: var(--color-primary);
            background: rgba(74, 144, 217, .08);
            padding: 4px 10px;
            border-radius: var(--radius-chip);
            margin-bottom: 12px;
        }
        .scene-text h3 {
            font-size: 22px;
            font-weight: 700;
            color: var(--color-text);
            line-height: 1.4;
            margin-bottom: 14px;
        }
        .scene-text p {
            color: var(--color-body);
            font-size: 15px;
            line-height: 1.7;
            margin-bottom: 20px;
        }
        .check-list li {
            position: relative;
            padding-left: 28px;
            margin-bottom: 10px;
            font-size: 14px;
            color: var(--color-body);
        }
        .check-list li::before {
            content: "\f00c";
            font-family: "Font Awesome 6 Free";
            font-weight: 900;
            position: absolute;
            left: 0;
            top: 0;
            color: var(--color-accent);
            font-size: 13px;
        }

        /* ===== 数据指标 ===== */
        .section-stats {
            background: var(--color-bg-deep);
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .stat-card {
            background: var(--color-card);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 40px 24px;
            text-align: center;
            transition: var(--transition);
        }
        .stat-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .stat-num {
            font-family: var(--font-num);
            font-size: 40px;
            font-weight: 800;
            color: var(--color-primary);
            line-height: 1.2;
        }
        .stat-label {
            font-size: 14px;
            color: var(--color-muted);
            margin-top: 10px;
        }
        .stats-note {
            text-align: center;
            color: var(--color-muted);
            font-size: 13px;
            margin-top: 28px;
        }

        /* ===== 功能清单卡 ===== */
        .section-features {
            background: var(--color-bg);
        }
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .feature-card {
            background: var(--color-card);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 28px 24px;
            transition: var(--transition);
            border-top: 3px solid transparent;
        }
        .feature-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-top-color: var(--color-primary);
        }
        .feature-icon {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: rgba(74, 144, 217, .1);
            color: var(--color-primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            margin-bottom: 16px;
            transition: var(--transition);
        }
        .feature-card:hover .feature-icon {
            background: var(--color-primary);
            color: #fff;
        }
        .feature-card h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--color-text);
            margin-bottom: 10px;
            line-height: 1.4;
        }
        .feature-card p {
            font-size: 14px;
            color: var(--color-body);
            line-height: 1.7;
        }

        /* ===== FAQ ===== */
        .section-faq {
            background: var(--color-bg-deep);
        }
        .faq-list {
            max-width: 880px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--color-card);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 0 24px;
            margin-bottom: 16px;
            border-left: 3px solid transparent;
            transition: var(--transition);
        }
        .faq-item.active {
            border-left-color: var(--color-primary);
            box-shadow: var(--shadow-hover);
        }
        .faq-question {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 20px 0;
            cursor: pointer;
            font-size: 15px;
            font-weight: 600;
            color: var(--color-text);
            user-select: none;
        }
        .faq-q {
            width: 28px;
            height: 28px;
            background: var(--color-primary);
            color: #fff;
            font-size: 12px;
            font-weight: 700;
            border-radius: 6px;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }
        .faq-question i {
            margin-left: auto;
            font-size: 13px;
            color: var(--color-muted);
            transition: transform .3s ease;
        }
        .faq-item.active .faq-question i {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height .3s ease;
            padding: 0 0 0 42px;
        }
        .faq-item.active .faq-answer {
            max-height: 320px;
            padding-bottom: 20px;
        }
        .faq-answer p {
            font-size: 14px;
            color: var(--color-body);
            line-height: 1.7;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--color-bg);
            padding: 80px 0 96px;
        }
        .cta-box {
            background: var(--color-bg-deep);
            border: 1px solid rgba(74, 144, 217, .2);
            border-radius: var(--radius-card);
            padding: 56px 48px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-box::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: var(--color-primary);
        }
        .cta-box h2 {
            font-size: 28px;
            font-weight: 700;
            color: var(--color-text);
            line-height: 1.3;
            margin-bottom: 12px;
        }
        .cta-box p {
            color: var(--color-body);
            font-size: 15px;
            margin-bottom: 28px;
        }
        .cta-actions {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--color-footer);
            padding: 64px 0 0;
            color: rgba(255, 255, 255, .6);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
            gap: 48px;
            padding-bottom: 48px;
        }
        .footer-brand .logo-text {
            font-size: 22px;
            color: #fff;
        }
        .footer-brand .logo-text span {
            color: var(--color-primary-light);
        }
        .footer-brand p {
            font-size: 13px;
            line-height: 1.7;
            color: rgba(255, 255, 255, .55);
            margin-top: 14px;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 18px;
        }
        .footer-col ul li {
            margin-bottom: 10px;
            font-size: 13px;
        }
        .footer-col ul li a {
            color: rgba(255, 255, 255, .55);
            text-decoration: none;
            transition: var(--transition);
        }
        .footer-col ul li a:hover {
            color: #fff;
        }
        .footer-contact i {
            color: var(--color-primary-light);
            margin-right: 8px;
            font-size: 13px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .08);
            padding: 20px 0;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
            font-size: 13px;
            color: rgba(255, 255, 255, .4);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .scene-row {
                grid-template-columns: 5fr 5fr;
                gap: 32px;
            }
            .feature-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 992px) {
            .container {
                padding: 0 24px;
            }
            .nav-toggle {
                display: inline-flex;
            }
            .nav-chip-wrap {
                position: fixed;
                top: 68px;
                left: 0;
                right: 0;
                background: #fff;
                flex-direction: column;
                align-items: stretch;
                padding: 20px 24px;
                margin: 0;
                display: none;
                border-bottom: 1px solid var(--color-border);
                box-shadow: 0 12px 30px rgba(0, 0, 0, .06);
                z-index: 98;
            }
            .nav-chip-wrap.open {
                display: flex;
            }
            .nav-chip {
                justify-content: center;
                padding: 12px 16px;
            }
            .header-cta {
                display: none;
            }
            .mobile-cta {
                display: inline-flex;
                margin-top: 8px;
            }
            .scene-row,
            .scene-row.reverse {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .scene-row.reverse .scene-img {
                order: 1;
            }
            .scene-row.reverse .scene-text {
                order: 2;
            }
            section {
                padding: 64px 0;
            }
            .page-banner {
                padding: 56px 0 72px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 40px;
            }
        }

        @media (max-width: 768px) {
            .section-head h2 {
                font-size: 24px;
            }
            .scene-text h3 {
                font-size: 20px;
            }
            .cta-box {
                padding: 40px 24px;
            }
            .cta-box h2 {
                font-size: 24px;
            }
            .banner-inner h1 {
                font-size: 24px;
            }
            .feature-grid {
                gap: 16px;
            }
        }

        @media (max-width: 576px) {
            .container {
                padding: 0 16px;
            }
            .page-banner {
                padding: 48px 0 60px;
            }
            .banner-actions {
                flex-direction: column;
                align-items: center;
            }
            .banner-actions .btn {
                width: 100%;
                max-width: 280px;
            }
            .stats-grid {
                grid-template-columns: 1fr;
                gap: 12px;
            }
            .stat-card {
                padding: 24px;
            }
            .stat-num {
                font-size: 32px;
            }
            .scene-img img {
                aspect-ratio: 4/3;
            }
            .feature-grid {
                grid-template-columns: 1fr;
            }
            .cta-section {
                padding: 56px 0 72px;
            }
            .cta-box {
                border-radius: 10px;
            }
            .cta-actions .btn {
                width: 100%;
                max-width: 280px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
                justify-content: center;
            }
        }