/* roulang page: index */
:root {
            --bg-main: #F4F5F8;
            --bg-card: #FFFFFF;
            --bg-dark: #0B0C10;
            --bg-dark-card: #14171F;
            --brand-primary: #2B5876;
            --brand-accent: #00E599;
            --brand-cyan: #00C9FF;
            --text-main: #1E2022;
            --text-muted: #686D76;
            --text-light: #F4F5F8;
            --border-color: #E2E8F0;
            --border-dark: #2A303C;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --shadow-subtle: 0 10px 30px -10px rgba(0, 0, 0, 0.05);
            --shadow-elevated: 0 20px 40px -15px rgba(0, 0, 0, 0.1);
            --transition-smooth: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
        }

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

        html {
            scroll-behavior: smooth;
            font-family: system-ui, -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
            background-color: var(--bg-main);
            color: var(--text-main);
            -webkit-font-smoothing: antialiased;
        }

        body {
            line-height: 1.7;
            font-size: 15px;
            overflow-x: hidden;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition-smooth);
        }

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

        .container {
            width: 100%;
            max-width: 1240px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* 顶部公用栏 */
        .utility-bar {
            background-color: #ECEEF2;
            font-size: 13px;
            color: var(--text-muted);
            border-bottom: 1px solid var(--border-color);
            padding: 7px 0;
        }
        .utility-flex {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .utility-tags {
            display: flex;
            gap: 16px;
        }
        .utility-item {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .status-dot {
            width: 7px;
            height: 7px;
            background-color: var(--brand-accent);
            border-radius: 50%;
            display: inline-block;
            box-shadow: 0 0 6px var(--brand-accent);
        }

        /* 主吸顶导航 */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(226, 232, 240, 0.8);
            transition: var(--transition-smooth);
        }
        .nav-wrapper {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }
        .logo-group {
            display: flex;
            align-items: center;
            gap: 12px;
            font-weight: 700;
            font-size: 20px;
            letter-spacing: -0.02em;
            color: var(--text-main);
        }
        .logo-mark {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, #1E2022 0%, #2B5876 100%);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 800;
            font-size: 18px;
            box-shadow: 0 4px 12px rgba(43, 88, 118, 0.25);
        }
        .nav-menu {
            display: flex;
            align-items: center;
            gap: 28px;
            list-style: none;
        }
        .nav-link {
            font-size: 15px;
            font-weight: 500;
            color: #333940;
            position: relative;
            padding: 6px 0;
        }
        .nav-link:hover {
            color: var(--brand-primary);
        }
        .nav-link::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--brand-primary);
            transition: var(--transition-smooth);
        }
        .nav-link:hover::after {
            width: 100%;
        }
        .nav-action {
            display: flex;
            align-items: center;
            gap: 14px;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: #14171F;
            color: #FFFFFF;
            padding: 10px 22px;
            border-radius: 8px;
            font-size: 14px;
            font-weight: 600;
            border: 1px solid #14171F;
            cursor: pointer;
            transition: var(--transition-smooth);
        }
        .btn-primary:hover {
            background: #2B5876;
            border-color: #2B5876;
            transform: translateY(-2px);
            box-shadow: 0 6px 18px rgba(43, 88, 118, 0.3);
        }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: transparent;
            color: var(--text-main);
            padding: 10px 20px;
            border-radius: 8px;
            font-size: 14px;
            font-weight: 600;
            border: 1px solid var(--border-color);
            cursor: pointer;
            transition: var(--transition-smooth);
        }
        .btn-outline:hover {
            border-color: var(--brand-primary);
            color: var(--brand-primary);
            background: rgba(43, 88, 118, 0.04);
        }

        /* 移动端汉堡按钮 */
        .mobile-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: none;
            border: none;
            cursor: pointer;
            padding: 6px;
        }
        .mobile-toggle span {
            width: 24px;
            height: 2px;
            background: var(--text-main);
            transition: var(--transition-smooth);
        }

        /* 基础 Section 结构 */
        section {
            padding: 96px 0;
            position: relative;
        }
        .section-header {
            max-width: 780px;
            margin-bottom: 56px;
        }
        .section-header.center {
            text-align: center;
            margin-left: auto;
            margin-right: auto;
        }
        .section-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 4px 14px;
            border-radius: 20px;
            background: #E8ECEF;
            color: var(--brand-primary);
            font-size: 12px;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.05em;
            margin-bottom: 16px;
        }
        .section-title {
            font-size: 34px;
            font-weight: 700;
            line-height: 1.25;
            color: var(--text-main);
            margin-bottom: 16px;
            letter-spacing: -0.01em;
        }
        .section-intro {
            font-size: 16px;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* 板块 01: Hero */
        #hero {
            padding: 80px 0 100px;
            background: linear-gradient(180deg, #F8FAFC 0%, #EDF1F5 100%);
            overflow: hidden;
        }
        .hero-grid {
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 40px;
            align-items: center;
        }
        .hero-content h1 {
            font-size: 48px;
            font-weight: 800;
            line-height: 1.15;
            letter-spacing: -0.02em;
            margin-bottom: 20px;
            color: #101418;
        }
        .hero-lead {
            font-size: 17px;
            color: var(--text-muted);
            line-height: 1.75;
            margin-bottom: 32px;
        }
        .hero-cta-group {
            display: flex;
            gap: 16px;
            margin-bottom: 44px;
            flex-wrap: wrap;
        }
        .hero-metrics-bar {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
            padding: 24px;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-subtle);
        }
        .metric-item .val {
            font-size: 28px;
            font-weight: 800;
            color: #101418;
            line-height: 1;
            margin-bottom: 6px;
        }
        .metric-item .val span {
            font-size: 14px;
            font-weight: 500;
            color: var(--brand-primary);
            margin-left: 2px;
        }
        .metric-item .lbl {
            font-size: 13px;
            color: var(--text-muted);
        }
        .hero-visual {
            position: relative;
        }
        .hero-img-wrap {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: 0 25px 50px -12px rgba(15, 23, 42, 0.25);
            border: 1px solid rgba(255, 255, 255, 0.8);
        }
        .hero-img-wrap img {
            width: 100%;
            height: 480px;
            object-fit: cover;
            transition: transform 0.8s ease;
        }
        .hero-badge-float {
            position: absolute;
            bottom: 20px;
            left: 20px;
            background: rgba(11, 12, 16, 0.85);
            backdrop-filter: blur(12px);
            padding: 12px 20px;
            border-radius: 12px;
            color: #fff;
            border: 1px solid rgba(255, 255, 255, 0.15);
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .pulse-beacon {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background-color: var(--brand-accent);
            box-shadow: 0 0 8px var(--brand-accent);
        }

        /* 板块 02: 出行痛点与代际断层 */
        #industry-shift {
            background-color: #FFFFFF;
        }
        .shift-comparison-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
        }
        .shift-card {
            padding: 36px;
            border-radius: var(--radius-md);
            transition: var(--transition-smooth);
        }
        .shift-card.legacy {
            background: #F8F9FA;
            border: 1px dashed #CBD5E1;
        }
        .shift-card.modern {
            background: #F0F5F9;
            border: 1px solid #B8D0E3;
            box-shadow: var(--shadow-subtle);
        }
        .shift-card-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 24px;
        }
        .shift-card-title {
            font-size: 20px;
            font-weight: 700;
        }
        .shift-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 18px;
        }
        .shift-list-item {
            display: flex;
            gap: 14px;
            align-items: flex-start;
        }
        .shift-icon {
            flex-shrink: 0;
            width: 24px;
            height: 24px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 13px;
            font-weight: 700;
            margin-top: 2px;
        }
        .shift-icon.bad {
            background: #FEE2E2;
            color: #DC2626;
        }
        .shift-icon.good {
            background: #D1FAE5;
            color: #059669;
        }

        /* 板块 03: 全栈自研整车架构 */
        #architecture {
            background-color: #F8FAFC;
        }
        .arch-layout {
            display: grid;
            grid-template-columns: 1fr 1.1fr;
            gap: 48px;
            align-items: center;
        }
        .arch-media {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-elevated);
            border: 1px solid var(--border-color);
        }
        .arch-media img {
            width: 100%;
            height: 440px;
            object-fit: cover;
        }
        .tech-pill-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 20px;
            margin-top: 28px;
        }
        .tech-pill-card {
            background: #FFFFFF;
            padding: 20px 24px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-color);
            display: flex;
            gap: 20px;
            align-items: center;
            transition: var(--transition-smooth);
        }
        .tech-pill-card:hover {
            border-color: var(--brand-primary);
            transform: translateX(4px);
        }
        .tech-pill-num {
            font-size: 24px;
            font-weight: 800;
            color: var(--brand-primary);
            opacity: 0.8;
            font-family: monospace;
        }

        /* 板块 04: 全场景智能驾驶系统 (6卡网格) */
        #intelligent-driving {
            background-color: #FFFFFF;
        }
        .card-grid-6 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .pilot-card {
            background: #FBFBFC;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 32px 28px;
            transition: var(--transition-smooth);
            position: relative;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }
        .pilot-card:hover {
            border-color: var(--brand-primary);
            background: #FFFFFF;
            transform: translateY(-4px);
            box-shadow: var(--shadow-elevated);
        }
        .pilot-card-top {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 20px;
        }
        .pilot-icon-badge {
            width: 44px;
            height: 44px;
            background: rgba(43, 88, 118, 0.08);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--brand-primary);
            font-size: 20px;
            font-weight: 700;
        }
        .pilot-status-tag {
            font-size: 11px;
            font-weight: 600;
            padding: 3px 8px;
            border-radius: 4px;
            background: #EDF2F7;
            color: #4A5568;
            letter-spacing: 0.05em;
        }
        .pilot-status-tag.active {
            background: rgba(0, 229, 153, 0.15);
            color: #047857;
        }
        .pilot-card h3 {
            font-size: 19px;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--text-main);
        }
        .pilot-card p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.65;
        }

        /* 板块 05: 旗舰车型矩阵 */
        #models {
            background-color: #F8FAFC;
        }
        .model-cards-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .model-product-card {
            background: #FFFFFF;
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-color);
            transition: var(--transition-smooth);
            display: flex;
            flex-direction: column;
        }
        .model-product-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-elevated);
            border-color: #CBD5E1;
        }
        .model-img-stage {
            height: 240px;
            background: #EAEFF4;
            overflow: hidden;
            position: relative;
        }
        .model-img-stage img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.6s ease;
        }
        .model-product-card:hover .model-img-stage img {
            transform: scale(1.05);
        }
        .model-badge-float {
            position: absolute;
            top: 16px;
            left: 16px;
            background: rgba(15, 23, 42, 0.85);
            color: #FFF;
            font-size: 12px;
            padding: 4px 10px;
            border-radius: 6px;
            font-weight: 600;
        }
        .model-card-body {
            padding: 28px;
            display: flex;
            flex-direction: column;
            flex-grow: 1;
        }
        .model-card-body h3 {
            font-size: 22px;
            font-weight: 700;
            margin-bottom: 6px;
        }
        .model-type-sub {
            font-size: 13px;
            color: var(--brand-primary);
            font-weight: 600;
            margin-bottom: 20px;
        }
        .model-specs-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 8px;
            padding: 16px 0;
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
            margin-bottom: 24px;
            text-align: center;
        }
        .model-spec-val {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-main);
        }
        .model-spec-lbl {
            font-size: 11px;
            color: var(--text-muted);
            margin-top: 2px;
        }
        .model-price-box {
            display: flex;
            align-items: baseline;
            justify-content: space-between;
            margin-top: auto;
            padding-top: 10px;
        }
        .price-num {
            font-size: 22px;
            font-weight: 800;
            color: #101418;
        }
        .price-num span {
            font-size: 13px;
            font-weight: normal;
            color: var(--text-muted);
        }

        /* 板块 06: 数字沉浸座舱生态 (暗色对比) */
        #cockpit {
            background-color: var(--bg-dark);
            color: #FFFFFF;
            overflow: hidden;
        }
        #cockpit .section-badge {
            background: rgba(255, 255, 255, 0.1);
            color: var(--brand-accent);
        }
        #cockpit .section-title {
            color: #FFFFFF;
        }
        #cockpit .section-intro {
            color: #94A3B8;
        }
        .cockpit-view-wrap {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-dark);
            box-shadow: 0 30px 60px -20px rgba(0, 0, 0, 0.7);
            margin-bottom: 40px;
        }
        .cockpit-view-wrap img {
            width: 100%;
            height: 480px;
            object-fit: cover;
            filter: brightness(0.9);
        }
        .cockpit-features-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .cockpit-feature-item {
            background: var(--bg-dark-card);
            border: 1px solid var(--border-dark);
            border-radius: var(--radius-md);
            padding: 24px;
            transition: var(--transition-smooth);
        }
        .cockpit-feature-item:hover {
            border-color: var(--brand-accent);
            transform: translateY(-4px);
        }
        .cockpit-feature-item h3 {
            font-size: 17px;
            color: #FFFFFF;
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .cockpit-feature-item p {
            font-size: 13px;
            color: #94A3B8;
            line-height: 1.6;
        }

        /* 板块 07: 智驾实测用户故事 */
        #stories {
            background-color: #FFFFFF;
        }
        .story-cards-flow {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
        }
        .story-card {
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            background: #FAFBFD;
            overflow: hidden;
            display: flex;
            flex-direction: column;
        }
        .story-img-top {
            height: 200px;
            overflow: hidden;
        }
        .story-img-top img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .story-body {
            padding: 26px;
            display: flex;
            flex-direction: column;
            flex-grow: 1;
        }
        .story-tag-bar {
            display: flex;
            justify-content: space-between;
            font-size: 12px;
            color: var(--brand-primary);
            font-weight: 600;
            margin-bottom: 12px;
        }
        .story-quote {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 16px;
            line-height: 1.5;
        }
        .story-desc {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.65;
            margin-bottom: 20px;
        }
        .story-user-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-top: auto;
            padding-top: 14px;
            border-top: 1px solid var(--border-color);
        }
        .story-avatar {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: #E2E8F0;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 14px;
            color: var(--brand-primary);
        }
        .story-user-text {
            font-size: 12px;
        }
        .story-user-name {
            font-weight: 700;
            color: var(--text-main);
        }
        .story-user-car {
            color: var(--text-muted);
        }

        /* 板块 08: 关键数据统计条 */
        #metrics {
            background: linear-gradient(135deg, #1A222D 0%, #0F1319 100%);
            color: #FFFFFF;
            padding: 70px 0;
            border-top: 1px solid #2B3342;
            border-bottom: 1px solid #2B3342;
        }
        .metrics-4col-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            text-align: center;
        }
        .stat-block .stat-num {
            font-size: 44px;
            font-weight: 800;
            color: #FFFFFF;
            line-height: 1;
            margin-bottom: 10px;
            letter-spacing: -0.02em;
        }
        .stat-block .stat-num span {
            font-size: 20px;
            color: var(--brand-accent);
            margin-left: 2px;
            font-weight: 600;
        }
        .stat-block .stat-name {
            font-size: 15px;
            font-weight: 600;
            color: #E2E8F0;
            margin-bottom: 6px;
        }
        .stat-block .stat-note {
            font-size: 12px;
            color: #8E9BAE;
            line-height: 1.4;
        }

        /* 板块 09: 真实车主圈层声音 */
        #testimonials {
            background-color: #F8FAFC;
        }
        .testimonials-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .testi-card {
            background: #FFFFFF;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 30px;
            box-shadow: var(--shadow-subtle);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }
        .testi-stars {
            color: #F59E0B;
            font-size: 15px;
            margin-bottom: 16px;
            letter-spacing: 2px;
        }
        .testi-content {
            font-size: 14px;
            color: #374151;
            line-height: 1.7;
            margin-bottom: 24px;
        }
        .testi-author {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 16px;
            border-top: 1px solid var(--border-color);
            font-size: 12px;
        }
        .testi-name-box strong {
            display: block;
            font-size: 14px;
            color: var(--text-main);
        }
        .testi-badge {
            background: #ECFDF5;
            color: #059669;
            padding: 3px 8px;
            border-radius: 4px;
            font-weight: 600;
        }

        /* 板块 10: 前沿技术与动态发布 */
        #news {
            background-color: #FFFFFF;
        }
        .news-bento-layout {
            display: grid;
            grid-template-columns: 1.1fr 1fr;
            gap: 32px;
            align-items: stretch;
        }
        .news-featured-card {
            background: #F4F6F9;
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-color);
            display: flex;
            flex-direction: column;
        }
        .news-featured-img {
            height: 280px;
            overflow: hidden;
        }
        .news-featured-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .news-featured-content {
            padding: 30px;
            display: flex;
            flex-direction: column;
            flex-grow: 1;
        }
        .news-date {
            font-size: 12px;
            color: var(--brand-primary);
            font-weight: 600;
            margin-bottom: 8px;
        }
        .news-featured-content h3 {
            font-size: 21px;
            font-weight: 700;
            margin-bottom: 12px;
            line-height: 1.4;
        }
        .news-featured-content p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
        }
        .news-list-col {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }
        .news-list-item {
            background: #FAFBFD;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 22px;
            transition: var(--transition-smooth);
            cursor: pointer;
        }
        .news-list-item:hover {
            border-color: var(--brand-primary);
            transform: translateX(4px);
            background: #FFFFFF;
        }
        .news-list-item h4 {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--text-main);
        }
        .news-list-item p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* 板块 11: 购车与智能用车指南 (FAQ) */
        #faq {
            background-color: #F8FAFC;
        }
        .faq-accordion-container {
            max-width: 860px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .faq-item {
            background: #FFFFFF;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition-smooth);
        }
        .faq-item[open] {
            border-color: #CBD5E1;
            box-shadow: var(--shadow-subtle);
        }
        .faq-item summary {
            padding: 22px 28px;
            font-size: 17px;
            font-weight: 700;
            color: var(--text-main);
            cursor: pointer;
            list-style: none;
            display: flex;
            justify-content: space-between;
            align-items: center;
            user-select: none;
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-arrow {
            width: 18px;
            height: 18px;
            transition: transform 0.3s ease;
            font-size: 14px;
            color: var(--brand-primary);
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .faq-item[open] .faq-arrow {
            transform: rotate(180deg);
        }
        .faq-answer {
            padding: 0 28px 24px 28px;
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.75;
            border-top: 1px dashed #F1F5F9;
            padding-top: 16px;
        }

        /* 板块 12: 全系定制与试驾预约 (转化面板) */
        #test-drive {
            background-color: #FFFFFF;
        }
        .booking-dual-card {
            background: linear-gradient(135deg, #10141B 0%, #1E2734 100%);
            border-radius: var(--radius-lg);
            overflow: hidden;
            display: grid;
            grid-template-columns: 1fr 1fr;
            box-shadow: var(--shadow-elevated);
            color: #FFFFFF;
        }
        .booking-info-pane {
            padding: 60px 48px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            border-right: 1px solid rgba(255, 255, 255, 0.1);
        }
        .booking-info-pane h3 {
            font-size: 32px;
            font-weight: 800;
            margin-bottom: 16px;
            line-height: 1.3;
        }
        .booking-info-pane p {
            color: #94A3B8;
            font-size: 15px;
            margin-bottom: 36px;
            line-height: 1.7;
        }
        .benefit-checklist {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .benefit-checklist li {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 14px;
            color: #E2E8F0;
        }
        .check-badge {
            width: 22px;
            height: 22px;
            background: rgba(0, 229, 153, 0.2);
            color: var(--brand-accent);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 12px;
            font-weight: bold;
        }
        .booking-form-pane {
            padding: 60px 48px;
            background: rgba(255, 255, 255, 0.03);
        }
        .booking-form {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }
        .form-row {
            display: flex;
            gap: 16px;
        }
        .form-group {
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .form-group label {
            font-size: 13px;
            color: #CBD5E1;
            font-weight: 500;
        }
        .form-input, .form-select {
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.2);
            padding: 13px 16px;
            border-radius: 8px;
            color: #FFF;
            font-size: 14px;
            outline: none;
            transition: var(--transition-smooth);
        }
        .form-input:focus, .form-select:focus {
            border-color: var(--brand-cyan);
            background: rgba(255, 255, 255, 0.12);
        }
        .form-select option {
            background: #1A222D;
            color: #FFF;
        }
        .privacy-box {
            font-size: 12px;
            color: #94A3B8;
            display: flex;
            align-items: center;
            gap: 8px;
            margin-top: 4px;
        }
        .privacy-box input {
            accent-color: var(--brand-accent);
        }
        .btn-submit-booking {
            background: linear-gradient(135deg, #00C9FF 0%, #00E599 100%);
            color: #0B0C10;
            border: none;
            padding: 15px;
            border-radius: 8px;
            font-size: 16px;
            font-weight: 700;
            cursor: pointer;
            transition: var(--transition-smooth);
            margin-top: 10px;
        }
        .btn-submit-booking:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 25px -5px rgba(0, 229, 153, 0.4);
        }

        /* 统一页脚 */
        .site-footer {
            background: #0B0E14;
            color: #8C96A6;
            padding: 80px 0 30px;
            border-top: 1px solid #1E2430;
            font-size: 13px;
        }
        .footer-grid-top {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
            gap: 48px;
            padding-bottom: 50px;
            border-bottom: 1px solid #1E2430;
        }
        .footer-brand-title {
            font-size: 20px;
            font-weight: 800;
            color: #FFFFFF;
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .footer-brand-desc {
            line-height: 1.75;
            color: #94A3B8;
            margin-bottom: 20px;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 20px;
        }
        .footer-links {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .footer-links a:hover {
            color: #FFFFFF;
            padding-left: 4px;
        }
        .footer-contact-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
            color: #94A3B8;
        }
        .footer-bottom-bar {
            padding-top: 30px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 16px;
            font-size: 12px;
            color: #64748B;
        }

        /* 移动端菜单抽屉 */
        .mobile-nav-drawer {
            display: none;
            position: fixed;
            top: 72px;
            left: 0;
            width: 100%;
            background: #FFFFFF;
            border-bottom: 1px solid var(--border-color);
            padding: 24px;
            box-shadow: var(--shadow-elevated);
            z-index: 999;
        }
        .mobile-nav-drawer.active {
            display: block;
        }
        .mobile-nav-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 18px;
        }
        .mobile-nav-list a {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-main);
        }

        /* 响应式断点适配 */
        @media (max-width: 1024px) {
            .hero-grid, .arch-layout, .news-bento-layout, .booking-dual-card {
                grid-template-columns: 1fr;
            }
            .card-grid-6, .model-cards-grid, .story-cards-flow, .testimonials-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .cockpit-features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .metrics-4col-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 40px;
            }
            .footer-grid-top {
                grid-template-columns: repeat(2, 1fr);
            }
            .booking-info-pane {
                border-right: none;
                border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            }
        }

        @media (max-width: 768px) {
            .utility-bar {
                display: none;
            }
            .nav-menu {
                display: none;
            }
            .mobile-toggle {
                display: flex;
            }
            .hero-content h1 {
                font-size: 34px;
            }
            .hero-img-wrap img {
                height: 320px;
            }
            .section-title {
                font-size: 26px;
            }
            section {
                padding: 64px 0;
            }
            .shift-comparison-grid,
            .card-grid-6,
            .model-cards-grid,
            .story-cards-flow,
            .testimonials-grid,
            .cockpit-features-grid,
            .metrics-4col-grid {
                grid-template-columns: 1fr;
            }
            .booking-info-pane, .booking-form-pane {
                padding: 36px 20px;
            }
            .form-row {
                flex-direction: column;
                gap: 20px;
            }
            .footer-grid-top {
                grid-template-columns: 1fr;
                gap: 36px;
            }
            .footer-bottom-bar {
                flex-direction: column;
                text-align: center;
            }
        }