/* roulang page: index */
:root {
      --bg-dark: #0B0F17;
      --bg-darker: #06090F;
      --bg-light: #F4F6F9;
      --bg-card: #FFFFFF;
      --primary: #00A896;
      --primary-dark: #028090;
      --accent-orange: #FF6B35;
      --accent-warm: #F7C59F;
      --text-main: #111827;
      --text-body: #374151;
      --text-muted: #6B7280;
      --text-white: #F9FAFB;
      --border-color: #E5E7EB;
      --border-dark: #1F2937;
      --radius-sm: 6px;
      --radius-md: 10px;
      --radius-lg: 16px;
      --shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
      --shadow-md: 0 8px 24px rgba(11,15,23,0.06);
      --shadow-lg: 0 16px 36px rgba(11,15,23,0.12);
      --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "PingFang SC", "Noto Sans CJK SC", "Microsoft YaHei", sans-serif;
    }

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

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

    body {
      font-family: var(--font-stack);
      color: var(--text-body);
      background-color: #FFFFFF;
      line-height: 1.6;
      overflow-x: hidden;
      -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;
    }

    .container {
      width: 100%;
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 顶部微型状态条 */
    .top-bar {
      background-color: var(--bg-darker);
      color: #9CA3AF;
      font-size: 0.8125rem;
      border-bottom: 1px solid #1E293B;
      padding: 8px 0;
    }
    .top-bar-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 12px;
    }
    .top-bar-tags {
      display: flex;
      gap: 16px;
      align-items: center;
    }
    .top-bar-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      color: #34D399;
      font-weight: 500;
    }
    .top-bar-badge::before {
      content: "";
      width: 6px;
      height: 6px;
      border-radius: 50%;
      background-color: #34D399;
      display: inline-block;
    }

    /* 主导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.96);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: 0 2px 8px rgba(0,0,0,0.03);
    }
    .nav-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .site-brand {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 1.25rem;
      font-weight: 800;
      color: var(--text-main);
      letter-spacing: -0.02em;
    }
    .brand-radar-icon {
      width: 32px;
      height: 32px;
      background: linear-gradient(135deg, var(--primary), var(--primary-dark));
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #FFF;
      font-weight: bold;
      font-size: 14px;
      box-shadow: 0 4px 10px rgba(0, 168, 150, 0.35);
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 28px;
      list-style: none;
    }
    .nav-item a {
      font-size: 0.9375rem;
      font-weight: 500;
      color: #4B5563;
    }
    .nav-item a:hover {
      color: var(--primary);
    }
    .nav-actions {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .btn-apply {
      padding: 10px 22px;
      border-radius: var(--radius-sm);
      font-size: 0.875rem;
      font-weight: 600;
      background: var(--primary);
      color: #FFF;
      display: inline-block;
      box-shadow: 0 2px 6px rgba(0, 168, 150, 0.25);
    }
    .btn-apply:hover {
      background: var(--primary-dark);
      transform: translateY(-1px);
    }

    /* 板块通用头部 */
    .section {
      padding: 96px 0;
      position: relative;
    }
    .section-light {
      background-color: var(--bg-light);
    }
    .section-dark {
      background-color: var(--bg-dark);
      color: var(--text-white);
    }
    .section-header {
      max-width: 820px;
      margin-bottom: 56px;
    }
    .section-header.center {
      margin-left: auto;
      margin-right: auto;
      text-align: center;
    }
    .section-badge {
      display: inline-block;
      font-size: 0.75rem;
      font-weight: 700;
      letter-spacing: 0.08em;
      text-transform: uppercase;
      padding: 4px 12px;
      background-color: rgba(0, 168, 150, 0.1);
      color: var(--primary);
      border-radius: 9999px;
      margin-bottom: 14px;
      border: 1px solid rgba(0, 168, 150, 0.2);
    }
    .section-dark .section-badge {
      background-color: rgba(0, 168, 150, 0.2);
      color: #5EEAD4;
      border-color: rgba(94, 234, 212, 0.3);
    }
    .section-title {
      font-size: 2.125rem;
      font-weight: 800;
      color: var(--text-main);
      line-height: 1.28;
      letter-spacing: -0.02em;
      margin-bottom: 16px;
    }
    .section-dark .section-title {
      color: var(--text-white);
    }
    .section-desc {
      font-size: 1.0625rem;
      color: var(--text-muted);
      line-height: 1.7;
    }
    .section-dark .section-desc {
      color: #9CA3AF;
    }

    /* 板块 1: 首屏 (Hero - 直播预告与实时监测封版) */
    .hero-section {
      position: relative;
      background-color: var(--bg-darker);
      background-image: linear-gradient(rgba(11, 15, 23, 0.88), rgba(6, 9, 15, 0.94)), url('/assets/images/bb29a8cb0d0db486.webp');
      background-size: cover;
      background-position: center;
      color: #FFF;
      padding: 100px 0 110px;
      overflow: hidden;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 48px;
      align-items: center;
    }
    .hero-content h1 {
      font-size: 2.875rem;
      font-weight: 900;
      line-height: 1.2;
      letter-spacing: -0.03em;
      margin-bottom: 24px;
      color: #FFFFFF;
    }
    .hero-content h1 span {
      background: linear-gradient(90deg, #5EEAD4, #F7C59F);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-intro {
      font-size: 1.125rem;
      line-height: 1.75;
      color: #D1D5DB;
      margin-bottom: 36px;
      max-width: 620px;
    }
    .hero-action-group {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 36px;
    }
    .btn-hero-primary {
      padding: 14px 32px;
      background: var(--primary);
      color: #FFF;
      border-radius: var(--radius-sm);
      font-weight: 700;
      font-size: 1rem;
      display: inline-flex;
      align-items: center;
      gap: 10px;
      box-shadow: 0 4px 14px rgba(0, 168, 150, 0.4);
    }
    .btn-hero-primary:hover {
      background: var(--primary-dark);
      transform: translateY(-2px);
    }
    .btn-hero-outline {
      padding: 14px 28px;
      border: 1px solid #4B5563;
      color: #F9FAFB;
      border-radius: var(--radius-sm);
      font-weight: 600;
      font-size: 1rem;
    }
    .btn-hero-outline:hover {
      background: rgba(255,255,255,0.08);
      border-color: #9CA3AF;
    }
    /* 首屏右侧：空域时空联演预告卡 */
    .stream-preview-card {
      background: rgba(17, 24, 39, 0.75);
      backdrop-filter: blur(16px);
      border: 1px solid rgba(255, 255, 255, 0.12);
      border-radius: var(--radius-lg);
      padding: 30px;
      box-shadow: 0 20px 50px rgba(0,0,0,0.5);
    }
    .stream-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 20px;
      border-bottom: 1px solid rgba(255,255,255,0.08);
      padding-bottom: 14px;
    }
    .stream-tag {
      background: rgba(255, 107, 53, 0.2);
      color: var(--accent-orange);
      border: 1px solid rgba(255, 107, 53, 0.4);
      font-size: 0.75rem;
      font-weight: 700;
      padding: 3px 10px;
      border-radius: 4px;
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }
    .stream-tag::before {
      content: "";
      width: 6px;
      height: 6px;
      background: var(--accent-orange);
      border-radius: 50%;
      animation: pulse 1.5s infinite;
    }
    @keyframes pulse {
      0% { opacity: 0.4; }
      50% { opacity: 1; }
      100% { opacity: 0.4; }
    }
    .countdown-timer-wrap {
      margin: 20px 0;
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 10px;
      text-align: center;
    }
    .countdown-box {
      background: rgba(11, 15, 23, 0.6);
      border: 1px solid rgba(255,255,255,0.08);
      border-radius: var(--radius-sm);
      padding: 12px 6px;
    }
    .countdown-num {
      font-size: 1.5rem;
      font-weight: 800;
      color: #5EEAD4;
      display: block;
      font-family: monospace;
    }
    .countdown-label {
      font-size: 0.6875rem;
      color: #9CA3AF;
    }
    .stream-desc {
      font-size: 0.875rem;
      color: #D1D5DB;
      line-height: 1.6;
      margin-bottom: 20px;
    }
    .stream-subscribe-form {
      display: flex;
      gap: 8px;
    }
    .stream-input {
      flex: 1;
      background: rgba(0, 0, 0, 0.4);
      border: 1px solid rgba(255,255,255,0.2);
      padding: 10px 14px;
      border-radius: var(--radius-sm);
      color: #FFF;
      font-size: 0.875rem;
    }
    .stream-input:focus {
      outline: none;
      border-color: var(--primary);
    }
    .btn-remind {
      background: var(--accent-orange);
      color: #FFF;
      border: none;
      padding: 10px 18px;
      border-radius: var(--radius-sm);
      font-weight: 600;
      font-size: 0.875rem;
      cursor: pointer;
      white-space: nowrap;
    }
    .btn-remind:hover {
      background: #E85A26;
    }

    /* 板块 2: 品类入口 (空域数据品类体系) */
    .category-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .category-card {
      background: #FFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      transition: all 0.3s ease;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .category-card:hover {
      border-color: var(--primary);
      box-shadow: var(--shadow-md);
      transform: translateY(-3px);
    }
    .cat-icon-wrap {
      width: 48px;
      height: 48px;
      background: rgba(0, 168, 150, 0.08);
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 18px;
      color: var(--primary);
      font-weight: 800;
      font-size: 1.25rem;
    }
    .category-card h3 {
      font-size: 1.125rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
    }
    .category-card p {
      font-size: 0.875rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 16px;
    }
    .category-link {
      font-size: 0.8125rem;
      font-weight: 600;
      color: var(--primary-dark);
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    /* 板块 3: 空域指标看板 (数据驱动流核验) */
    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .metric-box {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-top: 4px solid var(--primary);
      border-radius: var(--radius-md);
      padding: 28px 20px;
      box-shadow: var(--shadow-sm);
    }
    .metric-value {
      font-size: 2.375rem;
      font-weight: 900;
      color: var(--text-main);
      letter-spacing: -0.03em;
      line-height: 1;
      margin-bottom: 10px;
      font-family: monospace;
    }
    .metric-label {
      font-size: 0.9375rem;
      font-weight: 700;
      color: var(--text-body);
      margin-bottom: 6px;
    }
    .metric-sub {
      font-size: 0.8125rem;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* 板块 4: 服务矩阵 (网格化调度与感知) */
    .matrix-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .matrix-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 32px 24px;
      transition: all 0.3s;
    }
    .matrix-card:hover {
      box-shadow: var(--shadow-md);
      border-color: rgba(0, 168, 150, 0.4);
    }
    .matrix-card-title {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }
    .matrix-card-desc {
      font-size: 0.9375rem;
      color: var(--text-body);
      line-height: 1.65;
      margin-bottom: 20px;
    }
    .matrix-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
    }
    .matrix-tag-item {
      font-size: 0.75rem;
      background: #F3F4F6;
      color: #4B5563;
      padding: 3px 8px;
      border-radius: 4px;
    }

    /* 板块 5: 结果对比 (传统调度 vs 全要素自动化平台) */
    .compare-container {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }
    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
    }
    .compare-table th {
      background: #F9FAFB;
      padding: 18px 24px;
      font-size: 0.9375rem;
      font-weight: 700;
      color: var(--text-main);
      border-bottom: 1px solid var(--border-color);
    }
    .compare-table td {
      padding: 20px 24px;
      font-size: 0.9375rem;
      border-bottom: 1px solid var(--border-color);
      line-height: 1.6;
    }
    .compare-table tr:last-child td {
      border-bottom: none;
    }
    .compare-col-feature {
      font-weight: 600;
      color: var(--text-main);
      width: 25%;
    }
    .compare-col-legacy {
      color: #6B7280;
      width: 37.5%;
      background: #FAFAFA;
    }
    .compare-col-platform {
      color: var(--primary-dark);
      font-weight: 600;
      width: 37.5%;
      background: rgba(0, 168, 150, 0.03);
    }

    /* 板块 6: 附近推荐与区域服务节点 (区域网格枢纽) */
    .node-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .node-card {
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      background: #FFFFFF;
      display: flex;
      flex-direction: column;
    }
    .node-image {
      height: 180px;
      width: 100%;
      object-fit: cover;
    }
    .node-body {
      padding: 24px;
      flex: 1;
      display: flex;
      flex-direction: column;
    }
    .node-title {
      font-size: 1.125rem;
      font-weight: 700;
      margin-bottom: 8px;
      color: var(--text-main);
    }
    .node-status {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      font-size: 0.75rem;
      color: var(--primary);
      margin-bottom: 12px;
    }
    .node-status::before {
      content: "";
      width: 8px;
      height: 8px;
      background: var(--primary);
      border-radius: 50%;
    }
    .node-desc {
      font-size: 0.875rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 16px;
      flex: 1;
    }
    .node-spec-line {
      font-size: 0.8125rem;
      color: #4B5563;
      border-top: 1px dashed var(--border-color);
      padding-top: 12px;
    }

    /* 板块 7: 系统演进里程碑 (时间线路线图) */
    .timeline-wrap {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }
    .timeline-item {
      background: rgba(255,255,255,0.04);
      border: 1px solid rgba(255,255,255,0.1);
      border-radius: var(--radius-md);
      padding: 24px;
      position: relative;
    }
    .timeline-item.active {
      border-color: var(--primary);
      background: rgba(0, 168, 150, 0.08);
    }
    .timeline-date {
      font-size: 0.8125rem;
      font-weight: 700;
      color: var(--accent-warm);
      margin-bottom: 8px;
      display: block;
    }
    .timeline-title {
      font-size: 1.0625rem;
      font-weight: 700;
      color: #FFF;
      margin-bottom: 10px;
    }
    .timeline-desc {
      font-size: 0.875rem;
      color: #9CA3AF;
      line-height: 1.6;
    }

    /* 板块 8: 口碑榜与应用评价 (标杆认证与评价) */
    .review-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .review-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .review-stars {
      color: #F59E0B;
      font-size: 0.875rem;
      letter-spacing: 2px;
      margin-bottom: 14px;
    }
    .review-quote {
      font-size: 0.9375rem;
      color: var(--text-body);
      line-height: 1.7;
      margin-bottom: 20px;
    }
    .review-author-wrap {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid #F3F4F6;
      padding-top: 16px;
    }
    .author-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: #E5E7EB;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: var(--text-muted);
    }
    .author-name {
      font-size: 0.9375rem;
      font-weight: 700;
      color: var(--text-main);
    }
    .author-org {
      font-size: 0.8125rem;
      color: var(--text-muted);
    }

    /* 板块 9: 保障承诺与合规标准 (工业级安全基底) */
    .guarantee-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .guarantee-card {
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px 20px;
      background: #FFF;
      text-align: center;
    }
    .guarantee-icon {
      width: 56px;
      height: 56px;
      margin: 0 auto 16px;
      background: rgba(0, 168, 150, 0.08);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary);
      font-size: 1.5rem;
      font-weight: bold;
    }
    .guarantee-card h4 {
      font-size: 1.0625rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
    }
    .guarantee-card p {
      font-size: 0.8125rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 板块 10: 到店与接入协同流程 (全生命周期对接) */
    .workflow-wrap {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }
    .step-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      position: relative;
    }
    .step-badge {
      font-size: 1.75rem;
      font-weight: 900;
      color: rgba(0, 168, 150, 0.25);
      line-height: 1;
      margin-bottom: 12px;
      font-family: monospace;
    }
    .step-card h4 {
      font-size: 1.0625rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
    }
    .step-card p {
      font-size: 0.875rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 板块 11: 资讯研讨与行业动态 (动态研讨列表) */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .news-card {
      background: #FFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      display: flex;
      flex-direction: column;
    }
    .news-cover {
      height: 190px;
      width: 100%;
      object-fit: cover;
    }
    .news-content {
      padding: 22px;
      flex: 1;
      display: flex;
      flex-direction: column;
    }
    .news-date {
      font-size: 0.75rem;
      color: var(--text-muted);
      margin-bottom: 8px;
    }
    .news-content h4 {
      font-size: 1.0625rem;
      font-weight: 700;
      color: var(--text-main);
      line-height: 1.45;
      margin-bottom: 10px;
    }
    .news-content p {
      font-size: 0.875rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 16px;
      flex: 1;
    }
    .news-link {
      font-size: 0.8125rem;
      font-weight: 600;
      color: var(--primary);
    }

    /* 板块 12: 常见疑难答疑 (FAQ) */
    .faq-list {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .faq-item {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
    }
    .faq-question {
      padding: 20px 24px;
      font-size: 1.0625rem;
      font-weight: 700;
      color: var(--text-main);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
    }
    .faq-question::after {
      content: "+";
      font-size: 1.25rem;
      font-weight: 400;
      color: var(--primary);
    }
    .faq-answer {
      padding: 0 24px 20px;
      font-size: 0.9375rem;
      color: var(--text-body);
      line-height: 1.7;
    }

    /* 板块 13: 预约入口与商业对接 (全站唯一收口行动区) */
    .contact-card-wrap {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-lg);
      display: grid;
      grid-template-columns: 1fr 1fr;
      overflow: hidden;
    }
    .contact-info-side {
      background: linear-gradient(135deg, var(--bg-dark), #1A2232);
      color: #FFF;
      padding: 48px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .contact-info-side h3 {
      font-size: 1.75rem;
      font-weight: 800;
      margin-bottom: 16px;
      line-height: 1.3;
    }
    .contact-info-side p {
      font-size: 0.9375rem;
      color: #D1D5DB;
      line-height: 1.7;
      margin-bottom: 30px;
    }
    .contact-channels {
      display: flex;
      flex-direction: column;
      gap: 14px;
    }
    .channel-item {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 0.875rem;
      color: #E5E7EB;
    }
    .contact-form-side {
      padding: 48px;
      background: #FFFFFF;
    }
    .form-group {
      margin-bottom: 18px;
    }
    .form-label {
      display: block;
      font-size: 0.875rem;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 6px;
    }
    .form-control {
      width: 100%;
      padding: 12px 14px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 0.875rem;
      background: #FAFAFA;
      transition: border-color 0.2s;
    }
    .form-control:focus {
      outline: none;
      border-color: var(--primary);
      background: #FFF;
    }
    .btn-submit {
      width: 100%;
      padding: 14px;
      background: var(--primary);
      color: #FFF;
      border: none;
      border-radius: var(--radius-sm);
      font-size: 1rem;
      font-weight: 700;
      cursor: pointer;
      box-shadow: 0 4px 12px rgba(0, 168, 150, 0.3);
      transition: background 0.2s;
    }
    .btn-submit:hover {
      background: var(--primary-dark);
    }

    /* 页脚 (Footer) */
    .site-footer {
      background-color: var(--bg-darker);
      color: #9CA3AF;
      border-top: 1px solid #1E293B;
      padding: 72px 0 36px;
      font-size: 0.875rem;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1fr;
      gap: 40px;
      margin-bottom: 50px;
    }
    .footer-brand-title {
      font-size: 1.25rem;
      font-weight: 800;
      color: #FFF;
      margin-bottom: 14px;
    }
    .footer-brand-desc {
      line-height: 1.7;
      font-size: 0.875rem;
      color: #9CA3AF;
      margin-bottom: 20px;
    }
    .footer-col h5 {
      font-size: 0.9375rem;
      font-weight: 700;
      color: #FFF;
      margin-bottom: 18px;
    }
    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-links a:hover {
      color: #5EEAD4;
    }
    .footer-bottom {
      border-top: 1px solid rgba(255,255,255,0.08);
      padding-top: 28px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 0.8125rem;
      color: #6B7280;
    }

    /* 响应式断点适配 */
    @media (max-width: 1024px) {
      .hero-grid {
        grid-template-columns: 1fr;
        gap: 40px;
      }
      .category-grid, .metrics-grid, .guarantee-grid, .workflow-wrap, .timeline-wrap {
        grid-template-columns: repeat(2, 1fr);
      }
      .matrix-grid, .node-grid, .review-grid, .news-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
      }
      .section {
        padding: 60px 0;
      }
      .hero-content h1 {
        font-size: 2.125rem;
      }
      .matrix-grid, .node-grid, .review-grid, .news-grid, .category-grid, .metrics-grid, .guarantee-grid, .workflow-wrap, .timeline-wrap {
        grid-template-columns: 1fr;
      }
      .contact-card-wrap {
        grid-template-columns: 1fr;
      }
      .contact-info-side, .contact-form-side {
        padding: 32px 20px;
      }
      .compare-table {
        display: block;
        overflow-x: auto;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
    }