/* roulang page: index */
:root {
            --primary: #0A4D4A;
            --primary-light: #0F766E;
            --primary-dark: #063230;
            --accent: #F59E0B;
            --accent-hover: #D97706;
            --dark: #0F172A;
            --dark-card: #1E293B;
            --light-bg: #F8FAFC;
            --white: #FFFFFF;
            --text-main: #1E293B;
            --text-muted: #64748B;
            --border: #E2E8F0;
            --radius-sm: 4px;
            --radius-md: 6px;
            --radius-lg: 8px;
            --shadow-subtle: 0 4px 12px rgba(15, 23, 42, 0.04);
            --shadow-hover: 0 16px 32px -8px rgba(10, 77, 74, 0.12);
            --container-max: 1240px;
            --transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
        }

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

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

        body {
            font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", Inter, "Helvetica Neue", sans-serif;
            color: var(--text-main);
            background-color: var(--white);
            line-height: 1.65;
            -webkit-font-smoothing: antialiased;
        }

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

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

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

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

        /* 顶部信息条 */
        .top-bar {
            background-color: #0B1320;
            color: #94A3B8;
            font-size: 13px;
            padding: 8px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .top-bar-inner {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .top-bar-tags {
            display: flex;
            gap: 20px;
        }
        .top-bar-tag-item {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .top-bar-contact {
            display: flex;
            gap: 18px;
        }

        /* 主导航条 */
        .header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border);
            transition: var(--transition);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }
        .brand-logo {
            display: flex;
            align-items: center;
            gap: 12px;
            font-weight: 700;
            font-size: 20px;
            color: var(--primary);
            letter-spacing: -0.5px;
        }
        .logo-symbol {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--white);
            font-weight: 900;
            font-size: 18px;
        }
        .nav-menu {
            display: flex;
            align-items: center;
            list-style: none;
            gap: 28px;
        }
        .nav-item a {
            font-size: 15px;
            font-weight: 500;
            color: #334155;
            padding: 6px 0;
            position: relative;
        }
        .nav-item a:hover,
        .nav-item a.active {
            color: var(--primary);
        }
        .nav-item a.active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 100%;
            height: 2px;
            background-color: var(--primary);
        }
        .header-cta-btn {
            background-color: var(--primary);
            color: var(--white);
            padding: 10px 20px;
            border-radius: var(--radius-sm);
            font-size: 14px;
            font-weight: 600;
            border: 1px solid transparent;
            cursor: pointer;
            transition: var(--transition);
        }
        .header-cta-btn:hover {
            background-color: var(--primary-light);
            box-shadow: 0 4px 12px rgba(15, 118, 110, 0.25);
        }
        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            cursor: pointer;
            padding: 8px;
        }
        .mobile-toggle span {
            display: block;
            width: 22px;
            height: 2px;
            background-color: #334155;
            margin: 5px 0;
            transition: var(--transition);
        }

        /* 基础板块与标题规范 */
        .section-block {
            padding: 88px 0;
        }
        .section-bg-light {
            background-color: var(--light-bg);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }
        .section-header {
            max-width: 800px;
            margin: 0 auto 52px;
            text-align: center;
        }
        .section-eyebrow {
            display: inline-block;
            font-size: 13px;
            font-weight: 700;
            letter-spacing: 1.5px;
            text-transform: uppercase;
            color: var(--primary-light);
            margin-bottom: 10px;
            background: rgba(15, 118, 110, 0.08);
            padding: 4px 12px;
            border-radius: var(--radius-sm);
        }
        .section-title {
            font-size: 32px;
            font-weight: 800;
            color: var(--dark);
            line-height: 1.3;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }
        .section-subtitle {
            font-size: 16px;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* 1. Hero 蓝图区（Bento 首屏：主卡 + 2个功能卡 + CTA 贯穿条） */
        .hero-section {
            padding: 48px 0 72px;
            background: linear-gradient(180deg, #FFFFFF 0%, #F1F5F9 100%);
        }
        .bento-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr;
            grid-template-rows: auto auto;
            gap: 20px;
            margin-bottom: 20px;
        }
        .bento-main {
            grid-row: span 2;
            position: relative;
            background: var(--dark);
            border-radius: var(--radius-lg);
            overflow: hidden;
            display: flex;
            flex-direction: column;
            justify-content: flex-end;
            padding: 48px 44px;
            min-height: 520px;
            box-shadow: 0 20px 40px rgba(15, 23, 42, 0.12);
        }
        .bento-main-bg {
            position: absolute;
            inset: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            opacity: 0.38;
            mix-blend-mode: luminosity;
        }
        .bento-main-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(0deg, #09101E 20%, rgba(9, 16, 30, 0.4) 80%);
        }
        .bento-main-content {
            position: relative;
            z-index: 2;
            max-width: 620px;
        }
        .badge-voltage {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(245, 158, 11, 0.15);
            border: 1px solid rgba(245, 158, 11, 0.4);
            color: var(--accent);
            padding: 6px 14px;
            border-radius: var(--radius-sm);
            font-size: 13px;
            font-weight: 700;
            margin-bottom: 18px;
        }
        .hero-title {
            font-size: 42px;
            font-weight: 800;
            color: var(--white);
            line-height: 1.25;
            margin-bottom: 18px;
            letter-spacing: -1px;
        }
        .hero-desc {
            font-size: 15px;
            color: #CBD5E1;
            line-height: 1.7;
            margin-bottom: 28px;
        }
        .bento-sub-card {
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 28px 26px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            box-shadow: var(--shadow-subtle);
            transition: var(--transition);
        }
        .bento-sub-card:hover {
            border-color: var(--primary-light);
            transform: translateY(-3px);
            box-shadow: var(--shadow-hover);
        }
        .card-tag {
            font-size: 12px;
            font-weight: 700;
            color: var(--primary);
            text-transform: uppercase;
            letter-spacing: 0.8px;
            margin-bottom: 8px;
        }
        .sub-card-title {
            font-size: 19px;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 10px;
            line-height: 1.35;
        }
        .sub-card-text {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
            margin-bottom: 16px;
        }
        .card-spec-badge {
            display: flex;
            align-items: center;
            justify-content: space-between;
            border-top: 1px dashed var(--border);
            padding-top: 14px;
            font-size: 13px;
            color: #475569;
            font-weight: 600;
        }
        .hero-cta-banner {
            background: var(--primary-dark);
            border-radius: var(--radius-lg);
            padding: 20px 32px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            color: var(--white);
        }
        .banner-items {
            display: flex;
            gap: 36px;
        }
        .banner-item {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .banner-item-num {
            font-size: 20px;
            font-weight: 800;
            color: var(--accent);
        }
        .banner-item-txt {
            font-size: 13px;
            color: #E2E8F0;
            line-height: 1.3;
        }
        .btn-accent {
            background-color: var(--accent);
            color: #0F172A;
            padding: 12px 24px;
            border-radius: var(--radius-sm);
            font-weight: 700;
            font-size: 14px;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: var(--transition);
        }
        .btn-accent:hover {
            background-color: var(--accent-hover);
            color: var(--white);
        }

        /* 2. 问题陈述板块 (#problem) */
        .pain-points-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .pain-card {
            background: var(--white);
            border: 1px solid #FED7AA;
            border-top: 4px solid #EA580C;
            border-radius: var(--radius-md);
            padding: 30px 24px;
            box-shadow: var(--shadow-subtle);
        }
        .pain-index {
            font-size: 13px;
            font-weight: 800;
            color: #EA580C;
            margin-bottom: 12px;
        }
        .pain-title {
            font-size: 18px;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 12px;
        }
        .pain-desc {
            font-size: 14px;
            color: #475569;
            line-height: 1.65;
        }

        /* 3. 制造实力与合规区 (#about) */
        .about-split {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 56px;
            align-items: center;
        }
        .about-image-wrapper {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: 0 16px 36px rgba(0,0,0,0.1);
        }
        .about-image-wrapper img {
            width: 100%;
            height: 420px;
            object-fit: cover;
        }
        .spec-overlay-card {
            position: absolute;
            bottom: 20px;
            left: 20px;
            right: 20px;
            background: rgba(15, 23, 42, 0.92);
            backdrop-filter: blur(8px);
            padding: 16px 20px;
            border-radius: var(--radius-sm);
            border-left: 4px solid var(--accent);
            color: var(--white);
        }
        .spec-overlay-card p {
            font-size: 13px;
            color: #CBD5E1;
        }
        .spec-overlay-card strong {
            color: var(--accent);
            font-weight: 700;
        }
        .about-text h3 {
            font-size: 26px;
            font-weight: 800;
            color: var(--dark);
            margin-bottom: 18px;
            line-height: 1.35;
        }
        .about-text p {
            font-size: 15px;
            color: #475569;
            margin-bottom: 20px;
            line-height: 1.7;
        }
        .spec-checklist {
            list-style: none;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 12px 20px;
            margin-top: 24px;
        }
        .spec-checklist li {
            font-size: 14px;
            font-weight: 600;
            color: #1E293B;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .spec-checklist li::before {
            content: '✓';
            color: var(--primary-light);
            font-weight: 900;
        }

        /* 4. 核心优势矩阵区 (#advantages) */
        .advantage-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .adv-card {
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 32px 26px;
            box-shadow: var(--shadow-subtle);
            transition: var(--transition);
        }
        .adv-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: var(--primary-light);
        }
        .adv-icon {
            width: 48px;
            height: 48px;
            border-radius: var(--radius-sm);
            background: rgba(10, 77, 74, 0.08);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 20px;
            margin-bottom: 20px;
        }
        .adv-card h4 {
            font-size: 18px;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 10px;
        }
        .adv-card p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.65;
        }

        /* 5. 热门新能源汽车工具分类展示区 (#products) */
        .product-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .product-card {
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            overflow: hidden;
            display: flex;
            flex-direction: column;
            box-shadow: var(--shadow-subtle);
            transition: var(--transition);
        }
        .product-card:hover {
            border-color: var(--primary);
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .product-img-wrap {
            height: 230px;
            overflow: hidden;
            background: #E2E8F0;
            position: relative;
        }
        .product-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .product-card:hover .product-img-wrap img {
            transform: scale(1.04);
        }
        .product-badge-top {
            position: absolute;
            top: 14px;
            left: 14px;
            background: var(--dark);
            color: var(--white);
            font-size: 12px;
            font-weight: 700;
            padding: 4px 10px;
            border-radius: var(--radius-sm);
        }
        .product-body {
            padding: 24px;
            flex-grow: 1;
            display: flex;
            flex-direction: column;
        }
        .product-body h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 10px;
            line-height: 1.4;
        }
        .product-body p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
            margin-bottom: 18px;
            flex-grow: 1;
        }
        .product-meta-specs {
            background: var(--light-bg);
            padding: 12px;
            border-radius: var(--radius-sm);
            font-size: 13px;
            color: #475569;
            margin-bottom: 18px;
        }
        .product-meta-specs div {
            display: flex;
            justify-content: space-between;
            margin-bottom: 4px;
        }
        .product-meta-specs div:last-child {
            margin-bottom: 0;
        }
        .btn-outline-product {
            display: block;
            text-align: center;
            padding: 10px;
            border: 1px solid var(--primary);
            color: var(--primary);
            font-size: 14px;
            font-weight: 600;
            border-radius: var(--radius-sm);
            transition: var(--transition);
        }
        .btn-outline-product:hover {
            background-color: var(--primary);
            color: var(--white);
        }

        /* 6. 高压安全深色对比区 (#philosophy) */
        .section-dark {
            background-color: var(--dark);
            color: var(--white);
            padding: 92px 0;
            position: relative;
        }
        .section-dark .section-title {
            color: var(--white);
        }
        .section-dark .section-subtitle {
            color: #94A3B8;
        }
        .timeline-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            position: relative;
        }
        .timeline-card {
            background: rgba(30, 41, 59, 0.7);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--radius-md);
            padding: 28px 22px;
            position: relative;
        }
        .timeline-card::after {
            content: '';
            position: absolute;
            top: 36px;
            right: -14px;
            width: 14px;
            height: 2px;
            background: rgba(255, 255, 255, 0.2);
            z-index: 1;
        }
        .timeline-card:last-child::after {
            display: none;
        }
        .step-num {
            font-size: 14px;
            font-weight: 800;
            color: var(--accent);
            text-transform: uppercase;
            letter-spacing: 1px;
            margin-bottom: 12px;
        }
        .timeline-card h4 {
            font-size: 17px;
            font-weight: 700;
            color: var(--white);
            margin-bottom: 10px;
        }
        .timeline-card p {
            font-size: 13px;
            color: #94A3B8;
            line-height: 1.65;
        }

        /* 7. 工程工法与解决方案区 (#solutions) */
        .solution-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .solution-step-item {
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 24px 20px;
            border-left: 3px solid var(--primary);
        }
        .solution-seq {
            display: inline-block;
            font-size: 12px;
            font-weight: 800;
            color: var(--primary);
            background: rgba(10, 77, 74, 0.08);
            padding: 2px 8px;
            border-radius: var(--radius-sm);
            margin-bottom: 10px;
        }
        .solution-step-item h4 {
            font-size: 16px;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 8px;
        }
        .solution-step-item p {
            font-size: 13px;
            color: #64748B;
            line-height: 1.6;
        }

        /* 8. 标杆企业应用案例墙 (#cases) */
        .case-wall-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 26px;
        }
        .case-card {
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-subtle);
        }
        .case-img-box {
            height: 190px;
            position: relative;
        }
        .case-img-box img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .case-badge {
            position: absolute;
            bottom: 12px;
            left: 14px;
            background: rgba(15, 23, 42, 0.85);
            color: var(--white);
            font-size: 12px;
            font-weight: 600;
            padding: 3px 10px;
            border-radius: var(--radius-sm);
        }
        .case-body {
            padding: 22px;
        }
        .case-body h4 {
            font-size: 17px;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 10px;
        }
        .case-body p {
            font-size: 14px;
            color: #475569;
            line-height: 1.6;
            margin-bottom: 14px;
        }
        .case-result-highlight {
            font-size: 13px;
            color: var(--primary-light);
            font-weight: 700;
            border-top: 1px solid var(--border);
            padding-top: 10px;
        }

        /* 9. 关键数据条 (#metrics) */
        .metrics-section {
            background: #0B1320;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            padding: 56px 0;
            color: var(--white);
        }
        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
            text-align: center;
        }
        .metric-item {
            padding: 12px;
            border-right: 1px solid rgba(255, 255, 255, 0.08);
        }
        .metric-item:last-child {
            border-right: none;
        }
        .metric-num {
            font-size: 40px;
            font-weight: 900;
            color: var(--accent);
            line-height: 1.1;
            margin-bottom: 8px;
            letter-spacing: -0.5px;
        }
        .metric-num span {
            font-size: 20px;
            font-weight: 600;
            margin-left: 2px;
        }
        .metric-label {
            font-size: 15px;
            font-weight: 600;
            color: #E2E8F0;
            margin-bottom: 4px;
        }
        .metric-desc {
            font-size: 12px;
            color: #94A3B8;
        }

        /* 10. 用户口碑评价区 (#reviews) */
        .reviews-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .review-card {
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            box-shadow: var(--shadow-subtle);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }
        .review-quote {
            font-size: 14px;
            color: #334155;
            line-height: 1.7;
            margin-bottom: 20px;
            position: relative;
        }
        .review-author {
            display: flex;
            align-items: center;
            gap: 12px;
            border-top: 1px solid var(--border);
            padding-top: 16px;
        }
        .author-avatar {
            width: 42px;
            height: 42px;
            border-radius: 50%;
            background: rgba(10, 77, 74, 0.12);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 15px;
        }
        .author-info h5 {
            font-size: 14px;
            font-weight: 700;
            color: var(--dark);
        }
        .author-info p {
            font-size: 12px;
            color: var(--text-muted);
        }

        /* 11. 维保技术资讯与标准区 (#news) */
        .news-layout {
            display: grid;
            grid-template-columns: 1.2fr 1fr;
            gap: 28px;
        }
        .news-featured-card {
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-subtle);
            display: flex;
            flex-direction: column;
        }
        .news-featured-img {
            height: 240px;
        }
        .news-featured-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .news-featured-body {
            padding: 26px;
            flex-grow: 1;
        }
        .news-date {
            font-size: 12px;
            font-weight: 700;
            color: var(--primary-light);
            margin-bottom: 8px;
        }
        .news-featured-body h3 {
            font-size: 20px;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 12px;
            line-height: 1.4;
        }
        .news-featured-body p {
            font-size: 14px;
            color: #475569;
            line-height: 1.65;
        }
        .news-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .news-list-item {
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 20px 22px;
            box-shadow: var(--shadow-subtle);
            transition: var(--transition);
        }
        .news-list-item:hover {
            border-color: var(--primary-light);
            transform: translateX(4px);
        }
        .news-list-item h4 {
            font-size: 16px;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .news-list-item p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* 12. 选型操作常见问题 FAQ (#faq) */
        .faq-container {
            max-width: 860px;
            margin: 0 auto;
        }
        .accordion-item {
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            margin-bottom: 14px;
            overflow: hidden;
            box-shadow: var(--shadow-subtle);
        }
        .accordion-header {
            width: 100%;
            padding: 20px 24px;
            text-align: left;
            background: none;
            border: none;
            outline: none;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 16px;
            font-weight: 700;
            color: var(--dark);
            transition: var(--transition);
        }
        .accordion-header:hover {
            color: var(--primary);
            background: #F8FAFC;
        }
        .accordion-icon {
            font-size: 18px;
            font-weight: 800;
            color: var(--primary);
            transition: transform 0.3s ease;
        }
        .accordion-item.open .accordion-icon {
            transform: rotate(45deg);
        }
        .accordion-body {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s cubic-bezier(0, 1, 0, 1);
            background: #FAFBFD;
        }
        .accordion-body-inner {
            padding: 0 24px 22px;
            font-size: 14px;
            color: #475569;
            line-height: 1.7;
            border-top: 1px solid #EDF2F7;
        }

        /* 13. 保障条 (#guarantee) */
        .guarantee-strip {
            background: #F1F5F9;
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
            padding: 44px 0;
        }
        .guarantee-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .guarantee-item {
            display: flex;
            align-items: center;
            gap: 16px;
            background: var(--white);
            padding: 18px 20px;
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
        }
        .guarantee-icon {
            width: 44px;
            height: 44px;
            background: rgba(15, 118, 110, 0.1);
            color: var(--primary);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            font-weight: 900;
            flex-shrink: 0;
        }
        .guarantee-text h4 {
            font-size: 15px;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 2px;
        }
        .guarantee-text p {
            font-size: 12px;
            color: var(--text-muted);
        }

        /* 14. 终极行动转化区 (#contact) */
        .contact-card-box {
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            display: grid;
            grid-template-columns: 1.1fr 1fr;
            box-shadow: 0 20px 40px rgba(15, 23, 42, 0.08);
        }
        .contact-info-col {
            background: linear-gradient(135deg, #0A4D4A 0%, #063230 100%);
            color: var(--white);
            padding: 48px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }
        .contact-info-col h3 {
            font-size: 28px;
            font-weight: 800;
            margin-bottom: 16px;
            line-height: 1.3;
        }
        .contact-info-col p {
            font-size: 15px;
            color: #CBD5E1;
            line-height: 1.7;
            margin-bottom: 28px;
        }
        .contact-meta-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .contact-meta-item {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 14px;
            color: #E2E8F0;
        }
        .contact-meta-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--accent);
        }
        .contact-form-col {
            padding: 48px;
            background: var(--white);
        }
        .contact-form-col h4 {
            font-size: 20px;
            font-weight: 800;
            color: var(--dark);
            margin-bottom: 8px;
        }
        .contact-form-col p {
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 24px;
        }
        .form-group {
            margin-bottom: 18px;
        }
        .form-label {
            display: block;
            font-size: 13px;
            font-weight: 600;
            color: #334155;
            margin-bottom: 6px;
        }
        .form-control {
            width: 100%;
            padding: 12px 14px;
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            font-size: 14px;
            color: var(--dark);
            outline: none;
            transition: var(--transition);
        }
        .form-control:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(10, 77, 74, 0.12);
        }
        .form-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
        }
        .btn-submit {
            width: 100%;
            background: var(--primary);
            color: var(--white);
            border: none;
            padding: 14px 20px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 700;
            cursor: pointer;
            transition: var(--transition);
        }
        .btn-submit:hover {
            background: var(--primary-light);
            box-shadow: 0 8px 16px rgba(10, 77, 74, 0.2);
        }

        /* 页脚区域 */
        .footer {
            background: #09101E;
            color: #94A3B8;
            padding: 72px 0 36px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            font-size: 14px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
            gap: 48px;
            margin-bottom: 48px;
        }
        .footer-brand h4 {
            font-size: 20px;
            font-weight: 800;
            color: var(--white);
            margin-bottom: 14px;
        }
        .footer-brand p {
            line-height: 1.7;
            font-size: 13px;
            color: #64748B;
            margin-bottom: 18px;
        }
        .footer-col h5 {
            font-size: 15px;
            font-weight: 700;
            color: var(--white);
            margin-bottom: 18px;
        }
        .footer-links {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-links a {
            color: #94A3B8;
            font-size: 13px;
        }
        .footer-links a:hover {
            color: var(--white);
            padding-left: 4px;
        }
        .footer-contact-item {
            margin-bottom: 12px;
            font-size: 13px;
            color: #94A3B8;
            display: flex;
            flex-direction: column;
            gap: 2px;
        }
        .footer-contact-item strong {
            color: #E2E8F0;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 28px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 12px;
            color: #64748B;
        }

        /* 响应式断点控制 */
        @media (max-width: 1024px) {
            .bento-grid {
                grid-template-columns: 1fr;
            }
            .bento-main {
                min-height: 440px;
            }
            .about-split {
                grid-template-columns: 1fr;
                gap: 40px;
            }
            .timeline-grid,
            .solution-steps,
            .guarantee-grid,
            .metrics-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .timeline-card::after {
                display: none;
            }
            .metric-item:nth-child(2) {
                border-right: none;
            }
            .case-wall-grid,
            .product-grid,
            .advantage-grid,
            .pain-points-grid,
            .reviews-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .news-layout {
                grid-template-columns: 1fr;
            }
            .contact-card-box {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 36px;
            }
        }

        @media (max-width: 768px) {
            .top-bar {
                display: none;
            }
            .nav-menu {
                display: none;
                position: absolute;
                top: 72px;
                left: 0;
                width: 100%;
                background: var(--white);
                flex-direction: column;
                padding: 24px;
                border-bottom: 1px solid var(--border);
                box-shadow: 0 16px 24px rgba(0,0,0,0.06);
                gap: 16px;
            }
            .nav-menu.active {
                display: flex;
            }
            .mobile-toggle {
                display: block;
            }
            .header-cta-btn {
                display: none;
            }
            .hero-title {
                font-size: 30px;
            }
            .section-title {
                font-size: 26px;
            }
            .section-block {
                padding: 56px 0;
            }
            .hero-cta-banner {
                flex-direction: column;
                align-items: flex-start;
                gap: 20px;
            }
            .banner-items {
                flex-direction: column;
                gap: 14px;
            }
            .case-wall-grid,
            .product-grid,
            .advantage-grid,
            .pain-points-grid,
            .reviews-grid,
            .timeline-grid,
            .solution-steps,
            .guarantee-grid,
            .metrics-grid {
                grid-template-columns: 1fr;
            }
            .metric-item {
                border-right: none;
                border-bottom: 1px solid rgba(255, 255, 255, 0.08);
                padding-bottom: 16px;
            }
            .form-row {
                grid-template-columns: 1fr;
            }
            .contact-info-col,
            .contact-form-col {
                padding: 28px 20px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                gap: 12px;
                text-align: center;
            }
        }