/* roulang page: index */
:root {
      --primary: #0284c7;
      --primary-hover: #0369a1;
      --primary-light: #e0f2fe;
      --accent: #2563eb;
      --dark-slate: #0f172a;
      --card-dark: #1e293b;
      --text-main: #1e293b;
      --text-muted: #64748b;
      --bg-light: #f8fafc;
      --bg-white: #ffffff;
      --border-color: #e2e8f0;
      --border-dark: #334155;
      --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
      --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
      --shadow-lg: 0 12px 28px rgba(0,0,0,0.12);
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 18px;
      --container-max: 1240px;
    }

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

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

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      line-height: 1.65;
      color: var(--text-main);
      background-color: var(--bg-white);
      -webkit-font-smoothing: antialiased;
    }

    a {
      text-decoration: none;
      color: inherit;
      transition: all 0.25s ease;
    }

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

    button, input, select, textarea {
      font-family: inherit;
      font-size: 1rem;
      outline: none;
    }

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

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.96);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 76px;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 1.45rem;
      font-weight: 700;
      color: var(--dark-slate);
    }
    .brand-logo-icon {
      width: 40px;
      height: 40px;
      background: linear-gradient(135deg, var(--primary), var(--accent));
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      border-radius: var(--radius-sm);
      font-size: 1.25rem;
      font-weight: 800;
    }
    .nav-list {
      display: flex;
      list-style: none;
      gap: 24px;
    }
    .nav-link {
      font-size: 0.96rem;
      font-weight: 500;
      color: var(--text-main);
      padding: 8px 12px;
      border-radius: var(--radius-sm);
    }
    .nav-link:hover, .nav-link.active {
      color: var(--primary);
      background: var(--primary-light);
    }
    .nav-cta-btn {
      padding: 10px 22px;
      background: var(--primary);
      color: #fff;
      border-radius: var(--radius-sm);
      font-weight: 600;
      font-size: 0.95rem;
      border: none;
      cursor: pointer;
      box-shadow: 0 2px 8px rgba(2, 132, 199, 0.3);
    }
    .nav-cta-btn:hover {
      background: var(--primary-hover);
      box-shadow: 0 4px 12px rgba(2, 132, 199, 0.4);
    }

    /* 板块通用 */
    section {
      padding: 80px 0;
      position: relative;
    }
    .section-header {
      text-align: center;
      max-width: 820px;
      margin: 0 auto 50px auto;
    }
    .section-tag {
      display: inline-block;
      padding: 4px 14px;
      background: var(--primary-light);
      color: var(--primary);
      font-size: 0.85rem;
      font-weight: 600;
      border-radius: 50px;
      margin-bottom: 12px;
      letter-spacing: 0.5px;
    }
    .section-title {
      font-size: 2.25rem;
      font-weight: 700;
      color: var(--dark-slate);
      margin-bottom: 16px;
      line-height: 1.35;
    }
    .section-subtitle {
      font-size: 1.05rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 1. 首屏视觉看板（问答与搜索型 Hero） */
    #hero {
      padding: 90px 0 100px 0;
      background: linear-gradient(rgba(15, 23, 42, 0.88), rgba(15, 23, 42, 0.92)), url('/assets/images/9d398c5851758ebe.webp') center/cover no-repeat;
      color: #fff;
      text-align: center;
    }
    .hero-content {
      max-width: 900px;
      margin: 0 auto;
    }
    .hero-title {
      font-size: 2.9rem;
      font-weight: 800;
      line-height: 1.25;
      margin-bottom: 22px;
      letter-spacing: -0.5px;
    }
    .hero-intro {
      font-size: 1.15rem;
      line-height: 1.85;
      color: #cbd5e1;
      margin-bottom: 36px;
    }
    .hero-search-box {
      max-width: 680px;
      margin: 0 auto 28px;
      position: relative;
      background: #ffffff;
      border-radius: 50px;
      padding: 6px 8px 6px 24px;
      display: flex;
      align-items: center;
      box-shadow: 0 10px 30px rgba(0,0,0,0.35);
    }
    .hero-search-box input {
      flex: 1;
      border: none;
      background: transparent;
      color: var(--dark-slate);
      font-size: 1.05rem;
    }
    .hero-search-btn {
      background: var(--primary);
      color: #fff;
      border: none;
      padding: 12px 28px;
      border-radius: 40px;
      font-weight: 600;
      cursor: pointer;
      transition: background 0.2s;
    }
    .hero-search-btn:hover {
      background: var(--primary-hover);
    }
    .hero-hot-chips {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 10px;
      align-items: center;
    }
    .chips-label {
      color: #94a3b8;
      font-size: 0.9rem;
    }
    .chip-item {
      background: rgba(255, 255, 255, 0.12);
      border: 1px solid rgba(255, 255, 255, 0.2);
      padding: 6px 14px;
      border-radius: 20px;
      font-size: 0.88rem;
      color: #f1f5f9;
      transition: all 0.2s;
    }
    .chip-item:hover {
      background: rgba(255, 255, 255, 0.25);
      color: #fff;
      border-color: #fff;
    }

    /* 2. 技术架构与可验证参数 */
    #about {
      background-color: var(--bg-white);
    }
    .about-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 50px;
      align-items: center;
    }
    .about-media {
      position: relative;
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-lg);
    }
    .about-media img {
      width: 100%;
      height: 420px;
      object-fit: cover;
    }
    .spec-table-box {
      background: var(--bg-light);
      border-radius: var(--radius-md);
      padding: 24px;
      border: 1px solid var(--border-color);
      margin-top: 24px;
    }
    .spec-table {
      width: 100%;
      border-collapse: collapse;
    }
    .spec-table td {
      padding: 10px 12px;
      border-bottom: 1px solid var(--border-color);
      font-size: 0.95rem;
    }
    .spec-table tr:last-child td {
      border-bottom: none;
    }
    .spec-table .spec-k {
      color: var(--text-muted);
      width: 40%;
    }
    .spec-table .spec-v {
      color: var(--primary);
      font-weight: 700;
    }

    /* 3. 核心优势六宫格 */
    #advantages {
      background-color: var(--bg-light);
    }
    .grid-6 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .card-adv {
      background: #fff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 30px 24px;
      transition: all 0.3s ease;
      box-shadow: var(--shadow-sm);
    }
    .card-adv:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-lg);
      border-color: var(--primary);
    }
    .adv-icon-badge {
      width: 48px;
      height: 48px;
      background: var(--primary-light);
      color: var(--primary);
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      font-weight: 700;
      margin-bottom: 18px;
    }
    .adv-title {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--dark-slate);
      margin-bottom: 12px;
    }
    .adv-desc {
      color: var(--text-muted);
      font-size: 0.92rem;
      line-height: 1.6;
    }

    /* 4. 硬件与核心产品阵列（三列对比） */
    #products {
      background-color: var(--bg-white);
    }
    .products-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }
    .product-card {
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      background: #fff;
      display: flex;
      flex-direction: column;
      box-shadow: var(--shadow-sm);
      transition: transform 0.25s, box-shadow 0.25s;
    }
    .product-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }
    .product-thumb {
      height: 220px;
      position: relative;
      background: #e2e8f0;
    }
    .product-thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    .product-body {
      padding: 24px;
      flex: 1;
      display: flex;
      flex-direction: column;
    }
    .product-name {
      font-size: 1.3rem;
      font-weight: 700;
      color: var(--dark-slate);
      margin-bottom: 10px;
    }
    .product-summary {
      color: var(--text-muted);
      font-size: 0.92rem;
      margin-bottom: 18px;
      flex: 1;
    }
    .product-specs-list {
      list-style: none;
      background: var(--bg-light);
      padding: 14px;
      border-radius: var(--radius-sm);
      margin-bottom: 20px;
      font-size: 0.86rem;
      color: var(--text-main);
    }
    .product-specs-list li {
      margin-bottom: 6px;
    }
    .product-specs-list li:last-child {
      margin-bottom: 0;
    }
    .product-btn {
      width: 100%;
      text-align: center;
      padding: 10px;
      background: #fff;
      color: var(--primary);
      border: 1px solid var(--primary);
      border-radius: var(--radius-sm);
      font-weight: 600;
    }
    .product-btn:hover {
      background: var(--primary);
      color: #fff;
    }

    /* 5. 行业解决方案流 */
    #solutions {
      background-color: var(--bg-light);
    }
    .solution-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      margin-bottom: 40px;
      background: #fff;
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }
    .solution-row:nth-child(even) {
      direction: rtl;
    }
    .solution-row:nth-child(even) .solution-text {
      direction: ltr;
    }
    .solution-img-box img {
      width: 100%;
      height: 100%;
      min-height: 320px;
      object-fit: cover;
    }
    .solution-text {
      padding: 40px;
      display: flex;
      flex-direction: column;
      justify-content: center;
    }
    .solution-badge {
      font-size: 0.82rem;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 8px;
      display: inline-block;
    }
    .solution-name {
      font-size: 1.6rem;
      font-weight: 700;
      color: var(--dark-slate);
      margin-bottom: 14px;
    }
    .solution-desc {
      color: var(--text-muted);
      font-size: 0.95rem;
      line-height: 1.7;
      margin-bottom: 20px;
    }
    .solution-bullets {
      list-style: none;
      font-size: 0.9rem;
      color: var(--text-main);
    }
    .solution-bullets li {
      position: relative;
      padding-left: 20px;
      margin-bottom: 8px;
    }
    .solution-bullets li::before {
      content: "✔";
      position: absolute;
      left: 0;
      color: #10b981;
      font-size: 0.8rem;
    }

    /* 6. 深色对比模式：全域管控云平台 */
    #platform {
      background-color: var(--dark-slate);
      color: #f8fafc;
      padding: 90px 0;
    }
    #platform .section-title {
      color: #ffffff;
    }
    #platform .section-subtitle {
      color: #94a3b8;
    }
    .platform-display {
      display: grid;
      grid-template-columns: 1fr 1.2fr;
      gap: 50px;
      align-items: center;
      margin-top: 30px;
    }
    .platform-features {
      display: flex;
      flex-direction: column;
      gap: 20px;
    }
    .platform-item {
      background: var(--card-dark);
      border: 1px solid var(--border-dark);
      padding: 24px;
      border-radius: var(--radius-md);
      transition: border-color 0.25s;
    }
    .platform-item:hover {
      border-color: var(--primary);
    }
    .platform-item h4 {
      font-size: 1.15rem;
      color: #38bdf8;
      margin-bottom: 8px;
    }
    .platform-item p {
      font-size: 0.9rem;
      color: #94a3b8;
      line-height: 1.6;
    }
    .platform-board {
      background: #090d16;
      border: 1px solid var(--border-dark);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: 0 10px 40px rgba(0,0,0,0.6);
    }
    .board-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      border-bottom: 1px solid var(--border-dark);
      padding-bottom: 14px;
      margin-bottom: 20px;
    }
    .board-status {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 0.85rem;
      color: #10b981;
    }
    .board-status-dot {
      width: 8px;
      height: 8px;
      background: #10b981;
      border-radius: 50%;
      box-shadow: 0 0 8px #10b981;
    }
    .board-stats-row {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 12px;
      margin-bottom: 20px;
    }
    .board-stat-box {
      background: var(--card-dark);
      padding: 14px;
      border-radius: var(--radius-sm);
      text-align: center;
    }
    .board-stat-val {
      font-size: 1.4rem;
      font-weight: 700;
      color: #38bdf8;
    }
    .board-stat-lbl {
      font-size: 0.78rem;
      color: #64748b;
      margin-top: 4px;
    }
    .board-preview-img {
      border-radius: var(--radius-sm);
      overflow: hidden;
      height: 200px;
    }
    .board-preview-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    /* 7. 标杆工程案例展示墙 */
    #cases {
      background-color: var(--bg-white);
    }
    .cases-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 22px;
    }
    .case-card {
      background: #fff;
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      transition: transform 0.25s, box-shadow 0.25s;
    }
    .case-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-md);
    }
    .case-thumb {
      height: 170px;
    }
    .case-thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    .case-content {
      padding: 18px;
    }
    .case-location {
      font-size: 0.8rem;
      color: var(--primary);
      font-weight: 600;
      margin-bottom: 4px;
    }
    .case-title {
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--dark-slate);
      margin-bottom: 12px;
    }
    .case-metric {
      font-size: 0.85rem;
      color: var(--text-muted);
      border-top: 1px solid var(--border-color);
      padding-top: 10px;
    }
    .case-metric strong {
      color: #059669;
    }

    /* 8. 真实业务场景用户故事 */
    #stories {
      background-color: var(--bg-light);
    }
    .story-container {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 32px;
    }
    .story-card {
      background: #fff;
      border-radius: var(--radius-md);
      padding: 36px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }
    .story-role {
      font-size: 0.9rem;
      font-weight: 700;
      color: var(--accent);
      margin-bottom: 12px;
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .story-headline {
      font-size: 1.35rem;
      font-weight: 700;
      color: var(--dark-slate);
      margin-bottom: 16px;
    }
    .story-body {
      font-size: 0.94rem;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 24px;
    }
    .story-comparison {
      display: grid;
      grid-template-columns: 1fr 1fr;
      background: var(--bg-light);
      padding: 14px 18px;
      border-radius: var(--radius-sm);
      gap: 10px;
      font-size: 0.86rem;
    }
    .comp-col-before {
      color: #dc2626;
    }
    .comp-col-after {
      color: #16a34a;
      font-weight: 600;
    }

    /* 9. 关键运行数据统计条 */
    #metrics {
      background: linear-gradient(135deg, #0284c7, #1d4ed8);
      color: #fff;
      padding: 60px 0;
    }
    .metrics-bar {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      text-align: center;
    }
    .metric-cell-val {
      font-size: 2.7rem;
      font-weight: 800;
      line-height: 1.1;
      margin-bottom: 6px;
      letter-spacing: -0.5px;
    }
    .metric-cell-lbl {
      font-size: 0.95rem;
      color: #e0f2fe;
    }

    /* 10. 多行业客户评价与见证 */
    #testimonials {
      background-color: var(--bg-white);
    }
    .testimonials-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .testimonial-card {
      background: var(--bg-light);
      padding: 30px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
    }
    .star-rating {
      color: #f59e0b;
      margin-bottom: 14px;
      font-size: 1.1rem;
    }
    .testimonial-quote {
      font-size: 0.94rem;
      color: var(--text-main);
      line-height: 1.7;
      margin-bottom: 20px;
      font-style: italic;
    }
    .testimonial-author {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--dark-slate);
    }
    .testimonial-unit {
      font-size: 0.82rem;
      color: var(--text-muted);
    }

    /* 11. 行业动态与资讯摘要 */
    #news {
      background-color: var(--bg-light);
    }
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
      margin-bottom: 40px;
    }
    .news-card {
      background: #fff;
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }
    .news-thumb {
      height: 180px;
    }      overflow: hidden;
    }
    .news-thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.3s ease;
    }
    .news-card:hover .news-thumb img {
      transform: scale(1.05);
    }
    .news-body {
      padding: 22px;
    }
    .news-date {
      font-size: 0.8rem;
      color: var(--text-muted);
      margin-bottom: 8px;
    }
    .news-heading {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--dark-slate);
      margin-bottom: 10px;
      line-height: 1.45;
    }
    .news-excerpt {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.6;
    }
    .news-bottom-action {
      text-align: center;
    }
    .btn-secondary {
      display: inline-block;
      padding: 12px 30px;
      background: #fff;
      color: var(--primary);
      border: 1px solid var(--primary);
      border-radius: var(--radius-sm);
      font-weight: 600;
      box-shadow: var(--shadow-sm);
    }
    .btn-secondary:hover {
      background: var(--primary);
      color: #fff;
    }

    /* 12. 常见问题解答手风琴 */
    #faq {
      background-color: var(--bg-white);
    }
    .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: #fff;
      overflow: hidden;
      transition: border-color 0.2s;
    }
    .faq-item.active {
      border-color: var(--primary);
    }
    .faq-trigger {
      width: 100%;
      padding: 20px 24px;
      text-align: left;
      background: transparent;
      border: none;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--dark-slate);
    }
    .faq-icon {
      font-size: 1.25rem;
      color: var(--primary);
      transition: transform 0.25s ease;
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
    }
    .faq-panel {
      padding: 0 24px 20px;
      color: var(--text-muted);
      font-size: 0.94rem;
      line-height: 1.7;
      display: none;
      border-top: 1px dashed var(--border-color);
      margin-top: 4px;
      padding-top: 14px;
    }
    .faq-item.active .faq-panel {
      display: block;
    }

    /* 13. 工程交付与售后保障承诺条 */
    #guarantee {
      background: #f1f5f9;
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
      padding: 50px 0;
    }
    .guarantee-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .guarantee-card {
      display: flex;
      align-items: flex-start;
      gap: 16px;
      background: #fff;
      padding: 20px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-color);
    }
    .guarantee-num {
      width: 36px;
      height: 36px;
      background: var(--primary-light);
      color: var(--primary);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 1.1rem;
      flex-shrink: 0;
    }
    .guarantee-info h5 {
      font-size: 1rem;
      font-weight: 700;
      color: var(--dark-slate);
      margin-bottom: 4px;
    }
    .guarantee-info p {
      font-size: 0.84rem;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* 14. 方案预约与车场评估表单 */
    #contact {
      background-color: var(--bg-white);
      padding: 90px 0;
    }
    .contact-layout {
      display: grid;
      grid-template-columns: 1fr 1.1fr;
      gap: 60px;
      align-items: start;
    }
    .contact-info-panel h3 {
      font-size: 2rem;
      font-weight: 800;
      color: var(--dark-slate);
      margin-bottom: 18px;
    }
    .contact-info-panel p {
      color: var(--text-muted);
      font-size: 1rem;
      margin-bottom: 30px;
      line-height: 1.7;
    }
    .contact-direct-card {
      background: var(--bg-light);
      border-radius: var(--radius-md);
      padding: 26px;
      border: 1px solid var(--border-color);
      margin-bottom: 24px;
    }
    .direct-item {
      display: flex;
      align-items: center;
      gap: 14px;
      margin-bottom: 14px;
      font-size: 0.95rem;
      color: var(--dark-slate);
    }
    .direct-item:last-child {
      margin-bottom: 0;
    }
    .direct-k {
      color: var(--text-muted);
      width: 75px;
    }
    .contact-form-box {
      background: #fff;
      padding: 40px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-lg);
    }
    .form-group {
      margin-bottom: 18px;
    }
    .form-label {
      display: block;
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--dark-slate);
      margin-bottom: 8px;
    }
    .form-control {
      width: 100%;
      padding: 12px 14px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      background: #fff;
      color: var(--dark-slate);
    }
    .form-control:focus {
      border-color: var(--primary);
    }
    .form-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
    }
    .form-submit-btn {
      width: 100%;
      padding: 14px;
      background: var(--primary);
      color: #fff;
      font-size: 1.05rem;
      font-weight: 700;
      border: none;
      border-radius: var(--radius-sm);
      cursor: pointer;
      transition: background 0.2s;
    }
    .form-submit-btn:hover {
      background: var(--primary-hover);
    }
    .form-privacy-note {
      font-size: 0.78rem;
      color: var(--text-muted);
      margin-top: 10px;
      text-align: center;
    }

    /* 页脚 */
    .site-footer {
      background: #090d16;
      color: #94a3b8;
      padding: 70px 0 30px;
      border-top: 1px solid var(--border-dark);
      font-size: 0.9rem;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
      gap: 40px;
      margin-bottom: 50px;
    }
    .footer-brand h4 {
      font-size: 1.35rem;
      color: #fff;
      margin-bottom: 14px;
    }
    .footer-brand p {
      line-height: 1.7;
      margin-bottom: 20px;
    }
    .footer-col h5 {
      font-size: 1rem;
      color: #fff;
      margin-bottom: 18px;
    }
    .footer-links {
      list-style: none;
    }
    .footer-links li {
      margin-bottom: 10px;
    }
    .footer-links a:hover {
      color: #38bdf8;
    }
    .footer-bottom {
      border-top: 1px solid var(--border-dark);
      padding-top: 28px;
      text-align: center;
      font-size: 0.85rem;
    }

    /* 响应式断点 */
    @media (max-width: 1024px) {
      .grid-6 {
        grid-template-columns: repeat(2, 1fr);
      }
      .cases-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .guarantee-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      .site-header {
        height: auto;
        padding: 12px 0;
      }
      .header-inner {
        flex-direction: column;
        gap: 14px;
        height: auto;
      }
      .nav-list {
        flex-wrap: wrap;
        justify-content: center;
        gap: 8px;
      }
      .hero-title {
        font-size: 2.1rem;
      }
      .about-grid, .platform-display, .story-container, .contact-layout {
        grid-template-columns: 1fr;
      }
      .products-grid, .testimonials-grid, .news-grid {
        grid-template-columns: 1fr;
      }
      .metrics-bar {
        grid-template-columns: repeat(2, 1fr);
        gap: 30px;
      }
      .solution-row, .solution-row:nth-child(even) {
        grid-template-columns: 1fr;
        direction: ltr;
      }
      .solution-row:nth-child(even) .solution-text {
        direction: ltr;
      }
      .form-row {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 520px) {
      .grid-6, .cases-grid, .guarantee-grid, .footer-grid, .metrics-bar {
        grid-template-columns: 1fr;
      }
      .hero-search-box {
        flex-direction: column;
        border-radius: var(--radius-md);
        padding: 12px;
        gap: 10px;
      }
      .hero-search-btn {
        width: 100%;
        border-radius: var(--radius-sm);
      }
      .contact-form-box {
        padding: 22px;
      }
    }