/* roulang page: index */
:root {
      --primary-dark: #0A192F;
      --primary-blue: #1E40AF;
      --primary-accent: #2563EB;
      --accent-orange: #D97706;
      --accent-orange-hover: #B45309;
      --bg-light: #F8FAFC;
      --bg-white: #FFFFFF;
      --bg-gray: #F1F5F9;
      --bg-dark-section: #0B132B;
      --text-main: #0F172A;
      --text-muted: #64748B;
      --text-light: #94A3B8;
      --text-white: #FFFFFF;
      --border-color: #E2E8F0;
      --border-dark: #1E293B;
      --radius-sm: 4px;
      --radius-md: 8px;
      --radius-lg: 12px;
      --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
      --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -1px rgba(0, 0, 0, 0.04);
      --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.03);
      --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
      --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    }

    *, *::before, *::after {
      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", "Noto Sans SC", sans-serif;
      color: var(--text-main);
      background-color: var(--bg-light);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }

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

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

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

    .container {
      width: 100%;
      max-width: 1280px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }

    /* 顶部顶栏 */
    .top-bar {
      background-color: var(--primary-dark);
      color: var(--text-light);
      font-size: 0.85rem;
      border-bottom: 1px solid var(--border-dark);
      padding: 8px 0;
    }
    .top-bar .container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 12px;
    }
    .top-bar-info {
      display: flex;
      gap: 20px;
      align-items: center;
    }
    .top-bar-info span {
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    /* 核心导航条 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background-color: rgba(255, 255, 255, 0.98);
      backdrop-filter: blur(8px);
      box-shadow: var(--shadow-sm);
      border-bottom: 1px solid var(--border-color);
    }
    .nav-wrapper {
      display: flex;
      justify-content: space-between;
      align-items: center;
      height: 72px;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 1.45rem;
      font-weight: 700;
      color: var(--primary-dark);
      letter-spacing: -0.5px;
    }
    .brand-badge {
      background-color: var(--primary-blue);
      color: var(--text-white);
      font-size: 0.75rem;
      padding: 2px 8px;
      border-radius: var(--radius-sm);
      font-weight: 600;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 28px;
      list-style: none;
    }
    .nav-link {
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-main);
      transition: var(--transition);
      padding: 8px 0;
      position: relative;
    }
    .nav-link:hover, .nav-link.active {
      color: var(--primary-blue);
    }
    .nav-link::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background-color: var(--primary-blue);
      transition: var(--transition);
    }
    .nav-link:hover::after, .nav-link.active::after {
      width: 100%;
    }
    .nav-btn {
      background-color: var(--accent-orange);
      color: var(--text-white);
      padding: 10px 20px;
      border-radius: var(--radius-md);
      font-weight: 600;
      font-size: 0.95rem;
      display: inline-flex;
      align-items: center;
      gap: 6px;
      transition: var(--transition);
      box-shadow: 0 2px 4px rgba(217, 119, 6, 0.2);
    }
    .nav-btn:hover {
      background-color: var(--accent-orange-hover);
      transform: translateY(-1px);
    }

    /* 基础板块通用样式 */
    .section-padding {
      padding: 80px 0;
    }
    .section-title-wrap {
      margin-bottom: 50px;
      text-align: center;
      max-width: 760px;
      margin-left: auto;
      margin-right: auto;
    }
    .section-title-wrap.text-left {
      text-align: left;
      margin-left: 0;
      margin-right: 0;
      max-width: 100%;
    }
    .section-tag {
      display: inline-block;
      font-size: 0.82rem;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 1px;
      color: var(--primary-blue);
      background-color: #DBEAFE;
      padding: 4px 12px;
      border-radius: var(--radius-sm);
      margin-bottom: 12px;
    }
    .section-title {
      font-size: clamp(1.6rem, 2.8vw, 2.25rem);
      font-weight: 700;
      color: var(--primary-dark);
      line-height: 1.3;
      margin-bottom: 14px;
    }
    .section-desc {
      font-size: 1rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* Section 1: Hero (视频官网全宽遮罩视觉) */
    .hero-section {
      position: relative;
      background-image: linear-gradient(rgba(10, 25, 47, 0.88), rgba(10, 25, 47, 0.92)), url('/assets/images/c64dad77b33cbda3.webp');
      background-size: cover;
      background-position: center;
      background-attachment: fixed;
      color: var(--text-white);
      padding: 110px 0 100px;
      border-bottom: 1px solid var(--border-dark);
    }
    .hero-content {
      max-width: 860px;
      margin: 0 auto;
      text-align: center;
    }
    .hero-badge-top {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background-color: rgba(255, 255, 255, 0.12);
      border: 1px solid rgba(255, 255, 255, 0.25);
      padding: 6px 16px;
      border-radius: 9999px;
      font-size: 0.85rem;
      margin-bottom: 24px;
      letter-spacing: 0.5px;
    }
    .hero-title {
      font-size: clamp(2rem, 4.2vw, 3.25rem);
      font-weight: 700;
      line-height: 1.25;
      margin-bottom: 22px;
      letter-spacing: -0.5px;
    }
    .hero-description {
      font-size: clamp(1rem, 1.2vw, 1.125rem);
      color: #CBD5E1;
      line-height: 1.75;
      margin-bottom: 36px;
      max-width: 780px;
      margin-left: auto;
      margin-right: auto;
    }
    .hero-actions {
      display: flex;
      justify-content: center;
      align-items: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 48px;
    }
    .btn-primary {
      background-color: var(--accent-orange);
      color: var(--text-white);
      padding: 14px 32px;
      border-radius: var(--radius-md);
      font-weight: 600;
      font-size: 1rem;
      display: inline-flex;
      align-items: center;
      gap: 8px;
      transition: var(--transition);
      border: none;
      cursor: pointer;
    }
    .btn-primary:hover {
      background-color: var(--accent-orange-hover);
      transform: translateY(-2px);
      box-shadow: 0 6px 12px rgba(217, 119, 6, 0.3);
    }
    .btn-outline {
      background-color: rgba(255, 255, 255, 0.08);
      color: var(--text-white);
      border: 1px solid rgba(255, 255, 255, 0.3);
      padding: 14px 28px;
      border-radius: var(--radius-md);
      font-weight: 600;
      font-size: 1rem;
      display: inline-flex;
      align-items: center;
      gap: 8px;
      transition: var(--transition);
    }
    .btn-outline:hover {
      background-color: rgba(255, 255, 255, 0.18);
      border-color: var(--text-white);
    }
    .hero-features-bar {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      background-color: rgba(15, 23, 42, 0.6);
      border: 1px solid rgba(255, 255, 255, 0.12);
      border-radius: var(--radius-lg);
      padding: 20px 24px;
      backdrop-filter: blur(6px);
      text-align: left;
    }
    .hero-feature-item {
      display: flex;
      flex-direction: column;
      border-right: 1px solid rgba(255, 255, 255, 0.1);
      padding-right: 16px;
    }
    .hero-feature-item:last-child {
      border-right: none;
      padding-right: 0;
    }
    .hero-feature-label {
      font-size: 0.8rem;
      color: var(--text-light);
      margin-bottom: 4px;
    }
    .hero-feature-val {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--text-white);
    }

    /* Section 2: 入口矩阵 (核心品类快速导航) */
    .section-matrix {
      background-color: var(--bg-white);
      border-bottom: 1px solid var(--border-color);
    }
    .matrix-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .matrix-card {
      background-color: var(--bg-light);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .matrix-card:hover {
      border-color: var(--primary-accent);
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }
    .matrix-icon {
      width: 48px;
      height: 48px;
      background-color: #EFF6FF;
      color: var(--primary-blue);
      border-radius: var(--radius-md);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.25rem;
      font-weight: 700;
      margin-bottom: 16px;
    }
    .matrix-card h3 {
      font-size: 1.15rem;
      color: var(--primary-dark);
      margin-bottom: 8px;
    }
    .matrix-card p {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.5;
      margin-bottom: 16px;
    }
    .matrix-link {
      font-size: 0.875rem;
      color: var(--primary-blue);
      font-weight: 600;
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    /* Section 3: 制造硬实力与技术标准 */
    .section-strength {
      background-color: var(--bg-light);
      border-bottom: 1px solid var(--border-color);
    }
    .strength-wrapper {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
    }
    .strength-image-box {
      position: relative;
      border-radius: var(--radius-lg);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-lg);
    }
    .strength-tag-badge {
      position: absolute;
      bottom: 20px;
      left: 20px;
      background-color: rgba(10, 25, 47, 0.9);
      color: var(--text-white);
      padding: 12px 20px;
      border-radius: var(--radius-md);
      font-size: 0.85rem;
      backdrop-filter: blur(4px);
      border: 1px solid rgba(255, 255, 255, 0.15);
    }
    .strength-content h2 {
      font-size: 2rem;
      color: var(--primary-dark);
      line-height: 1.3;
      margin-bottom: 16px;
    }
    .strength-content p {
      font-size: 0.98rem;
      color: var(--text-muted);
      line-height: 1.75;
      margin-bottom: 24px;
    }
    .strength-list {
      list-style: none;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
      margin-bottom: 28px;
    }
    .strength-list-item {
      display: flex;
      align-items: flex-start;
      gap: 10px;
      font-size: 0.92rem;
      color: var(--text-main);
    }
    .strength-list-item strong {
      color: var(--primary-blue);
    }

    /* Section 4: 卖点三连进阶 (六大核心工业优势) */
    .section-advantages {
      background-color: var(--bg-white);
      border-bottom: 1px solid var(--border-color);
    }
    .advantages-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .advantage-card {
      background-color: var(--bg-light);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px;
      transition: var(--transition);
      position: relative;
    }
    .advantage-card:hover {
      border-color: var(--primary-accent);
      box-shadow: var(--shadow-lg);
      transform: translateY(-4px);
    }
    .advantage-number {
      font-size: 1.8rem;
      font-weight: 800;
      color: #E2E8F0;
      margin-bottom: 12px;
      line-height: 1;
    }
    .advantage-card h3 {
      font-size: 1.15rem;
      color: var(--primary-dark);
      margin-bottom: 10px;
    }
    .advantage-card p {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* Section 5: 核心机器人产品矩阵微表格卡片 */
    .section-products {
      background-color: var(--bg-gray);
      border-bottom: 1px solid var(--border-color);
    }
    .products-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .product-card {
      background-color: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      overflow: hidden;
      display: flex;
      flex-direction: column;
      transition: var(--transition);
      box-shadow: var(--shadow-sm);
    }
    .product-card:hover {
      box-shadow: var(--shadow-xl);
      border-color: var(--primary-accent);
    }
    .product-img-box {
      height: 220px;
      overflow: hidden;
      position: relative;
    }
    .product-img-box img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }
    .product-card:hover .product-img-box img {
      transform: scale(1.05);
    }
    .product-type-badge {
      position: absolute;
      top: 14px;
      left: 14px;
      background-color: var(--primary-blue);
      color: var(--text-white);
      padding: 4px 10px;
      border-radius: var(--radius-sm);
      font-size: 0.75rem;
      font-weight: 600;
    }
    .product-body {
      padding: 24px;
      flex: 1;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .product-title {
      font-size: 1.25rem;
      color: var(--primary-dark);
      margin-bottom: 8px;
      font-weight: 700;
    }
    .product-desc {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 16px;
    }
    .spec-table {
      width: 100%;
      border-collapse: collapse;
      font-size: 0.85rem;
      margin-bottom: 20px;
      background-color: var(--bg-light);
      border-radius: var(--radius-sm);
      overflow: hidden;
    }
    .spec-table tr {
      border-bottom: 1px solid var(--border-color);
    }
    .spec-table tr:last-child {
      border-bottom: none;
    }
    .spec-table td {
      padding: 8px 12px;
      color: var(--text-main);
    }
    .spec-table td.spec-key {
      color: var(--text-muted);
      width: 40%;
      font-weight: 500;
    }
    .product-btn {
      background-color: #EFF6FF;
      color: var(--primary-blue);
      text-align: center;
      padding: 10px 0;
      border-radius: var(--radius-md);
      font-weight: 600;
      font-size: 0.9rem;
      transition: var(--transition);
      border: 1px solid #BFDBFE;
    }
    .product-btn:hover {
      background-color: var(--primary-blue);
      color: var(--text-white);
    }

    /* Section 6: 深色工业智能控制理念 */
    .section-tech-concept {
      background-color: var(--bg-dark-section);
      color: var(--text-white);
      border-bottom: 1px solid var(--border-dark);
    }
    .tech-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .tech-card {
      background-color: rgba(255, 255, 255, 0.04);
      border: 1px solid rgba(255, 255, 255, 0.1);
      border-radius: var(--radius-md);
      padding: 30px;
      transition: var(--transition);
    }
    .tech-card:hover {
      background-color: rgba(255, 255, 255, 0.07);
      border-color: var(--primary-accent);
      transform: translateY(-4px);
    }
    .tech-icon {
      font-size: 2rem;
      margin-bottom: 16px;
      color: #60A5FA;
    }
    .tech-card h3 {
      font-size: 1.2rem;
      margin-bottom: 12px;
      color: var(--text-white);
    }
    .tech-card p {
      font-size: 0.92rem;
      color: var(--text-light);
      line-height: 1.7;
    }

    /* Section 7: 应用场景落地流 */
    .section-scenarios {
      background-color: var(--bg-white);
      border-bottom: 1px solid var(--border-color);
    }
    .scenario-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .scenario-card {
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      background-color: var(--bg-light);
      display: flex;
      flex-direction: column;
    }
    .scenario-img {
      height: 160px;
      overflow: hidden;
    }
    .scenario-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    .scenario-content {
      padding: 18px;
      flex: 1;
    }
    .scenario-content h3 {
      font-size: 1.1rem;
      color: var(--primary-dark);
      margin-bottom: 8px;
    }
    .scenario-content p {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 12px;
    }
    .scenario-stat {
      font-size: 0.82rem;
      color: var(--accent-orange);
      font-weight: 700;
      background-color: #FEF3C7;
      padding: 4px 8px;
      border-radius: var(--radius-sm);
      display: inline-block;
    }

    /* Section 8: 工业效能关键数据统计条 */
    .section-counters {
      background-color: var(--primary-dark);
      color: var(--text-white);
      padding: 60px 0;
      border-bottom: 1px solid var(--border-dark);
    }
    .counters-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      text-align: center;
    }
    .counter-item {
      border-right: 1px solid rgba(255, 255, 255, 0.12);
      padding: 0 16px;
    }
    .counter-item:last-child {
      border-right: none;
    }
    .counter-val {
      font-size: clamp(2rem, 3.5vw, 3rem);
      font-weight: 800;
      color: var(--accent-orange);
      line-height: 1.1;
      margin-bottom: 8px;
    }
    .counter-unit {
      font-size: 1.2rem;
      font-weight: 600;
    }
    .counter-label {
      font-size: 0.95rem;
      color: #94A3B8;
      font-weight: 500;
    }

    /* Section 9: 标杆客户案例与ROI回报 */
    .section-cases {
      background-color: var(--bg-light);
      border-bottom: 1px solid var(--border-color);
    }
    .cases-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 32px;
    }
    .case-card {
      background-color: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 32px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .case-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 16px;
    }
    .case-title {
      font-size: 1.25rem;
      color: var(--primary-dark);
      font-weight: 700;
    }
    .case-badge {
      font-size: 0.8rem;
      color: #065F46;
      background-color: #D1FAE5;
      padding: 4px 10px;
      border-radius: 9999px;
      font-weight: 600;
    }
    .case-desc {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 20px;
    }
    .case-metrics {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 12px;
      background-color: var(--bg-light);
      padding: 16px;
      border-radius: var(--radius-md);
      text-align: center;
    }
    .metric-val {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--primary-blue);
      display: block;
    }
    .metric-name {
      font-size: 0.75rem;
      color: var(--text-muted);
    }

    /* Section 10: 自动化方案 vs 传统人工作业对比矩阵 */
    .section-comparison {
      background-color: var(--bg-white);
      border-bottom: 1px solid var(--border-color);
    }
    .compare-table-wrapper {
      overflow-x: auto;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-sm);
    }
    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 0.95rem;
    }
    .compare-table th {
      background-color: var(--primary-dark);
      color: var(--text-white);
      padding: 18px 24px;
      font-weight: 600;
    }
    .compare-table th.highlight-col {
      background-color: var(--primary-blue);
    }
    .compare-table td {
      padding: 18px 24px;
      border-bottom: 1px solid var(--border-color);
      color: var(--text-main);
    }
    .compare-table tr:nth-child(even) {
      background-color: var(--bg-light);
    }
    .compare-table td.feature-name {
      font-weight: 600;
      color: var(--primary-dark);
      width: 24%;
    }
    .compare-table td.highlight-cell {
      font-weight: 600;
      color: var(--primary-blue);
      background-color: rgba(37, 99, 235, 0.04);
    }

    /* Section 11: 工业机器人技术与行业资讯精选 */
    .section-news {
      background-color: var(--bg-light);
      border-bottom: 1px solid var(--border-color);
    }
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .news-card {
      background-color: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      display: flex;
      flex-direction: column;
      transition: var(--transition);
    }
    .news-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }
    .news-img {
      height: 180px;
      overflow: hidden;
    }
    .news-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    .news-body {
      padding: 22px;
      flex: 1;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .news-date {
      font-size: 0.8rem;
      color: var(--text-muted);
      margin-bottom: 8px;
    }
    .news-title {
      font-size: 1.1rem;
      color: var(--primary-dark);
      font-weight: 700;
      line-height: 1.4;
      margin-bottom: 10px;
    }
    .news-desc {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 16px;
    }
    .news-readmore {
      font-size: 0.85rem;
      color: var(--primary-blue);
      font-weight: 600;
      align-self: flex-start;
    }

    /* Section 12: 导入常见问题 FAQ (手风琴) */
    .section-faq {
      background-color: var(--bg-white);
      border-bottom: 1px solid var(--border-color);
    }
    .faq-container {
      max-width: 860px;
      margin: 0 auto;
    }
    .faq-item {
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      margin-bottom: 14px;
      background-color: var(--bg-light);
      overflow: hidden;
      transition: var(--transition);
    }
    .faq-item.active {
      border-color: var(--primary-accent);
      background-color: var(--bg-white);
      box-shadow: var(--shadow-sm);
    }
    .faq-question {
      padding: 18px 24px;
      font-size: 1.05rem;
      font-weight: 600;
      color: var(--primary-dark);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
    }
    .faq-icon {
      font-size: 1.25rem;
      color: var(--primary-blue);
      transition: transform 0.25s ease;
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
      color: var(--accent-orange);
    }
    .faq-answer {
      padding: 0 24px;
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.7;
    }
    .faq-item.active .faq-answer {
      padding: 0 24px 20px 24px;
      max-height: 250px;
    }

    /* Section 13: 平台与服务双重保障条 */
    .section-guarantee {
      background-color: #0F172A;
      color: var(--text-white);
      padding: 50px 0;
      border-bottom: 1px solid var(--border-dark);
    }
    .guarantee-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .guarantee-card {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .guarantee-icon {
      width: 48px;
      height: 48px;
      background-color: rgba(37, 99, 235, 0.2);
      border: 1px solid var(--primary-accent);
      color: #60A5FA;
      border-radius: var(--radius-md);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.25rem;
      font-weight: 700;
      flex-shrink: 0;
    }
    .guarantee-text h4 {
      font-size: 1rem;
      margin-bottom: 4px;
      color: var(--text-white);
    }
    .guarantee-text p {
      font-size: 0.82rem;
      color: var(--text-light);
    }

    /* Section 14: 底部转化表单与技术选型 */
    .section-cta {
      background-color: var(--bg-light);
      border-bottom: 1px solid var(--border-color);
    }
    .cta-wrapper {
      display: grid;
      grid-template-columns: 1fr 1.1fr;
      gap: 48px;
      align-items: center;
      background-color: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 48px;
      box-shadow: var(--shadow-md);
    }
    .cta-info h2 {
      font-size: 2rem;
      color: var(--primary-dark);
      line-height: 1.3;
      margin-bottom: 16px;
    }
    .cta-info p {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 24px;
    }
    .cta-contact-box {
      border-top: 1px solid var(--border-color);
      padding-top: 20px;
    }
    .cta-tel {
      font-size: 1.6rem;
      font-weight: 800;
      color: var(--primary-blue);
      margin-bottom: 4px;
    }
    .cta-sub {
      font-size: 0.85rem;
      color: var(--text-muted);
    }
    .form-box {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
    }
    .form-group-full {
      grid-column: span 2;
    }
    .form-label {
      display: block;
      font-size: 0.88rem;
      font-weight: 600;
      margin-bottom: 6px;
      color: var(--text-main);
    }
    .form-control {
      width: 100%;
      padding: 12px 14px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      font-size: 0.92rem;
      background-color: var(--bg-light);
      transition: var(--transition);
    }
    .form-control:focus {
      outline: none;
      border-color: var(--primary-blue);
      background-color: var(--bg-white);
      box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
    }
    .btn-submit {
      width: 100%;
      background-color: var(--accent-orange);
      color: var(--text-white);
      padding: 14px;
      border-radius: var(--radius-md);
      font-weight: 700;
      font-size: 1rem;
      border: none;
      cursor: pointer;
      transition: var(--transition);
    }
    .btn-submit:hover {
      background-color: var(--accent-orange-hover);
    }

    /* 统一页脚 */
    .site-footer {
      background-color: var(--primary-dark);
      color: var(--text-light);
      padding: 60px 0 28px;
      font-size: 0.88rem;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
      gap: 40px;
      margin-bottom: 48px;
    }
    .footer-brand h3 {
      font-size: 1.35rem;
      color: var(--text-white);
      margin-bottom: 14px;
    }
    .footer-brand p {
      line-height: 1.7;
      margin-bottom: 16px;
      font-size: 0.88rem;
    }
    .footer-col h4 {
      font-size: 1rem;
      color: var(--text-white);
      margin-bottom: 16px;
      font-weight: 600;
    }
    .footer-links {
      list-style: none;
    }
    .footer-links li {
      margin-bottom: 10px;
    }
    .footer-links a {
      color: var(--text-light);
      transition: var(--transition);
    }
    .footer-links a:hover {
      color: var(--text-white);
      padding-left: 4px;
    }
    .footer-bottom {
      border-top: 1px solid var(--border-dark);
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 0.8rem;
    }

    /* 移动端底部固定转化条 */
    .mobile-sticky-bar {
      display: none;
      position: fixed;
      bottom: 0;
      left: 0;
      width: 100%;
      height: 60px;
      background-color: rgba(10, 25, 47, 0.96);
      backdrop-filter: blur(8px);
      z-index: 9999;
      border-top: 1px solid var(--border-dark);
      padding: 0 16px;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
    }
    .mobile-call-btn {
      flex: 1;
      height: 42px;
      background-color: #334155;
      color: var(--text-white);
      border-radius: var(--radius-md);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 600;
      font-size: 0.9rem;
    }
    .mobile-form-btn {
      flex: 1.2;
      height: 42px;
      background-color: var(--accent-orange);
      color: var(--text-white);
      border-radius: var(--radius-md);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 600;
      font-size: 0.9rem;
    }

    /* 响应式媒体查询断点 */
    @media (max-width: 1024px) {
      .matrix-grid, .scenario-grid, .guarantee-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .advantages-grid, .products-grid, .tech-grid, .news-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .strength-wrapper, .cta-wrapper {
        grid-template-columns: 1fr;
        gap: 36px;
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .hero-features-bar {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
      }
      .hero-feature-item {
        border-right: none;
      }
    }

    @media (max-width: 768px) {
      .section-padding {
        padding: 56px 0;
      }
      .top-bar {
        display: none;
      }
      .nav-links, .nav-btn {
        display: none;
      }
      .advantages-grid, .products-grid, .tech-grid, .news-grid, .cases-grid, .counters-grid {
        grid-template-columns: 1fr;
      }
      .strength-list {
        grid-template-columns: 1fr;
      }
      .form-box {
        grid-template-columns: 1fr;
      }
      .form-group-full {
        grid-column: span 1;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .mobile-sticky-bar {
        display: flex;
      }
      body {
        padding-bottom: 60px;
      }
    }

    @media (max-width: 520px) {
      .matrix-grid, .scenario-grid, .guarantee-grid, .hero-features-bar {
        grid-template-columns: 1fr;
      }
      .hero-actions {
        flex-direction: column;
        width: 100%;
      }
      .btn-primary, .btn-outline {
        width: 100%;
        justify-content: center;
      }
      .case-metrics {
        grid-template-columns: 1fr;
      }
    }