/* roulang page: index */
:root {
      --primary: hsl(154, 85%, 40%);
      --primary-hover: hsl(154, 85%, 34%);
      --primary-light: hsla(154, 85%, 44%, 0.12);
      --secondary: hsl(215, 65%, 20%);
      --bg: hsl(220, 20%, 97%);
      --bg-alt: #ffffff;
      --bg-dark: #0C1017;
      --bg-dark-card: #151B26;
      --text: hsl(222, 47%, 11%);
      --text-muted: hsl(215, 16%, 47%);
      --text-inverse: #ffffff;
      --border: hsl(215, 20%, 90%);
      --border-dark: rgba(255, 255, 255, 0.08);
      --danger: hsl(354, 70%, 54%);
      --radius-sm: 8px;
      --radius-md: 12px;
      --radius-lg: 16px;
      --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
      --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.06);
      --shadow-lg: 0 12px 36px rgba(0, 0, 0, 0.09);
      --font-mono: ui-monospace, "SF Mono", "Roboto Mono", "Helvetica Neue", monospace;
      --font-main: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
    }

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

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: var(--font-main);
      background-color: var(--bg);
      color: var(--text);
      line-height: 1.65;
      font-size: 15px;
      -webkit-font-smoothing: antialiased;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: color 0.2s ease;
    }

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

    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 顶部导航 */
    .top-bar {
      background-color: #070a0e;
      color: #94a3b8;
      font-size: 13px;
      padding: 8px 0;
      border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    }
    .top-bar-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .status-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }
    .pulse-dot {
      width: 8px;
      height: 8px;
      background-color: var(--primary);
      border-radius: 50%;
      box-shadow: 0 0 8px var(--primary);
      animation: pulse 2s infinite;
    }
    @keyframes pulse {
      0%, 100% { opacity: 1; transform: scale(1); }
      50% { opacity: 0.4; transform: scale(0.85); }
    }

    header.site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-bottom: 1px solid var(--border);
    }
    .nav-container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      height: 72px;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 20px;
      font-weight: 800;
      color: var(--secondary);
    }
    .brand-logo svg {
      width: 32px;
      height: 32px;
      fill: var(--primary);
    }
    .main-nav {
      display: flex;
      align-items: center;
      gap: 28px;
    }
    .main-nav a {
      font-weight: 500;
      color: var(--text);
      font-size: 15px;
    }
    .main-nav a:hover {
      color: var(--primary);
    }
    .nav-btn {
      background-color: var(--primary);
      color: #fff;
      padding: 10px 20px;
      border-radius: var(--radius-sm);
      font-weight: 600;
      font-size: 14px;
      transition: background-color 0.2s ease, transform 0.2s ease;
    }
    .nav-btn:hover {
      background-color: var(--primary-hover);
      transform: translateY(-1px);
    }
    .menu-toggle {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      padding: 8px;
    }

    /* 按钮基础 */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 12px 26px;
      border-radius: var(--radius-sm);
      font-weight: 600;
      font-size: 15px;
      cursor: pointer;
      transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
      border: 1px solid transparent;
    }
    .btn-primary {
      background-color: var(--primary);
      color: #fff;
    }
    .btn-primary:hover {
      background-color: var(--primary-hover);
      box-shadow: 0 4px 14px hsla(154, 85%, 44%, 0.35);
      transform: translateY(-2px);
    }
    .btn-secondary {
      background: #fff;
      color: var(--secondary);
      border-color: var(--border);
    }
    .btn-secondary:hover {
      background-color: var(--bg);
      border-color: #cbd5e1;
      transform: translateY(-2px);
    }
    .btn-dark {
      background-color: #1e293b;
      color: #fff;
      border-color: rgba(255, 255, 255, 0.1);
    }
    .btn-dark:hover {
      background-color: #334155;
      transform: translateY(-2px);
    }

    /* 通用板块 */
    section {
      padding: 80px 0;
    }
    .section-header {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 50px;
    }
    .section-header.text-left {
      text-align: left;
      margin: 0 0 40px;
      max-width: none;
    }
    .section-tag {
      display: inline-block;
      font-size: 13px;
      font-weight: 700;
      color: var(--primary);
      text-transform: uppercase;
      letter-spacing: 1px;
      background: var(--primary-light);
      padding: 4px 12px;
      border-radius: 20px;
      margin-bottom: 12px;
    }
    .section-title {
      font-size: 34px;
      font-weight: 800;
      line-height: 1.25;
      color: var(--secondary);
      margin-bottom: 16px;
    }
    .section-desc {
      font-size: 16px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 1. Hero 裂变拼团首屏 */
    .hero-section {
      background: linear-gradient(135deg, rgba(12, 16, 23, 0.94), rgba(21, 27, 38, 0.9)), url('/assets/images/backpic/back-1.jpg') center/cover no-repeat;
      color: #fff;
      padding: 100px 0 90px;
      position: relative;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 50px;
      align-items: center;
    }
    .hero-content h1 {
      font-size: 46px;
      line-height: 1.18;
      font-weight: 800;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }
    .hero-content h1 span {
      color: var(--primary);
    }
    .hero-text {
      font-size: 16px;
      line-height: 1.8;
      color: #cbd5e1;
      margin-bottom: 30px;
    }
    .hero-actions {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 36px;
    }
    .hero-stats-row {
      display: flex;
      gap: 28px;
      border-top: 1px solid rgba(255, 255, 255, 0.1);
      padding-top: 24px;
    }
    .hero-stat-item strong {
      display: block;
      font-size: 26px;
      font-family: var(--font-mono);
      font-weight: 700;
      color: #fff;
    }
    .hero-stat-item span {
      font-size: 13px;
      color: #94a3b8;
    }

    /* 拼团裂变卡片 */
    .fission-card {
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid rgba(255, 255, 255, 0.12);
      backdrop-filter: blur(12px);
      border-radius: var(--radius-lg);
      padding: 30px;
      box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
    }
    .fission-badge {
      display: inline-block;
      background: var(--danger);
      color: #fff;
      font-size: 12px;
      font-weight: 700;
      padding: 3px 10px;
      border-radius: 4px;
      margin-bottom: 12px;
    }
    .fission-title {
      font-size: 20px;
      font-weight: 700;
      margin-bottom: 8px;
      color: #fff;
    }
    .fission-desc {
      font-size: 14px;
      color: #94a3b8;
      margin-bottom: 20px;
    }
    .progress-bar-wrapper {
      margin-bottom: 18px;
    }
    .progress-label-row {
      display: flex;
      justify-content: space-between;
      font-size: 13px;
      margin-bottom: 6px;
      color: #cbd5e1;
    }
    .progress-track {
      background: rgba(255, 255, 255, 0.15);
      height: 8px;
      border-radius: 4px;
      overflow: hidden;
    }
    .progress-fill {
      height: 100%;
      background: linear-gradient(90deg, var(--primary), #38bdf8);
      border-radius: 4px;
      width: 78%;
    }
    .fission-team-list {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 24px;
    }
    .avatar-stack {
      display: flex;
    }
    .avatar-stack span {
      width: 34px;
      height: 34px;
      border-radius: 50%;
      background: #334155;
      border: 2px solid #0f172a;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 12px;
      margin-left: -8px;
    }
    .avatar-stack span:first-child {
      margin-left: 0;
    }
    .fission-team-info {
      font-size: 13px;
      color: #cbd5e1;
    }
    .fission-team-info strong {
      color: var(--primary);
    }

    /* 2. 赛事痛点对比板块 */
    .challenges-section {
      background-color: var(--bg-alt);
    }
    .challenges-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }
    .pain-item {
      display: flex;
      gap: 16px;
      margin-bottom: 24px;
      padding: 18px;
      border-radius: var(--radius-md);
      background: var(--bg);
      border-left: 4px solid var(--danger);
    }
    .pain-num {
      font-size: 18px;
      font-weight: 800;
      color: var(--danger);
      font-family: var(--font-mono);
    }
    .pain-text h4 {
      font-size: 17px;
      font-weight: 700;
      color: var(--secondary);
      margin-bottom: 4px;
    }
    .pain-text p {
      font-size: 14px;
      color: var(--text-muted);
    }
    .radar-box {
      background: #0f172a;
      border-radius: var(--radius-lg);
      padding: 30px;
      color: #fff;
      border: 1px solid #1e293b;
    }
    .radar-metric-row {
      display: flex;
      justify-content: space-between;
      margin-bottom: 12px;
      padding-bottom: 12px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }
    .radar-metric-row:last-child {
      border-bottom: none;
      margin-bottom: 0;
      padding-bottom: 0;
    }
    .radar-metric-title {
      font-size: 14px;
      color: #94a3b8;
    }
    .radar-metric-val {
      font-family: var(--font-mono);
      font-weight: 700;
      font-size: 15px;
    }
    .val-good { color: var(--primary); }
    .val-bad { color: var(--danger); }

    /* 3. 架构解决方案 */
    .solutions-section {
      background-color: var(--bg);
    }
    .solutions-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 50px;
      align-items: center;
    }
    .solution-bullets {
      list-style: none;
      margin-top: 24px;
    }
    .solution-bullets li {
      position: relative;
      padding-left: 28px;
      margin-bottom: 16px;
      font-size: 15px;
      color: var(--text);
    }
    .solution-bullets li::before {
      content: "✓";
      position: absolute;
      left: 0;
      top: 0;
      color: var(--primary);
      font-weight: 800;
    }
    .img-frame {
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-md);
      border: 1px solid var(--border);
    }

    /* 4. 已上线能力（核心特性） */
    .features-section {
      background-color: var(--bg-alt);
    }
    .features-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .feature-card {
      background: var(--bg);
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 30px;
      transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
    }
    .feature-card:hover {
      transform: translateY(-4px);
      border-color: var(--primary);
      box-shadow: var(--shadow-md);
    }
    .feature-icon {
      width: 48px;
      height: 48px;
      border-radius: 10px;
      background: var(--primary-light);
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 20px;
    }
    .feature-icon svg {
      width: 24px;
      height: 24px;
      fill: var(--primary);
    }
    .feature-card h3 {
      font-size: 19px;
      font-weight: 700;
      color: var(--secondary);
      margin-bottom: 10px;
    }
    .feature-card p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 5. 终端产品展示 */
    .products-section {
      background-color: var(--bg);
    }
    .products-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .product-card {
      background: #fff;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
    }
    .product-img {
      height: 200px;
      overflow: hidden;
      background: #0f172a;
    }
    .product-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }
    .product-card:hover .product-img img {
      transform: scale(1.05);
    }
    .product-body {
      padding: 24px;
      flex: 1;
      display: flex;
      flex-direction: column;
    }
    .product-body h3 {
      font-size: 19px;
      font-weight: 700;
      color: var(--secondary);
      margin-bottom: 8px;
    }
    .product-body p {
      font-size: 14px;
      color: var(--text-muted);
      margin-bottom: 20px;
      flex: 1;
    }
    .product-link {
      font-weight: 600;
      color: var(--primary);
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    /* 6. 深色技术理念与数据分发流程 */
    .tech-concept-section {
      background-color: var(--bg-dark);
      color: #fff;
      padding: 90px 0;
    }
    .tech-header {
      text-align: center;
      max-width: 780px;
      margin: 0 auto 50px;
    }
    .tech-header h2 {
      font-size: 32px;
      font-weight: 800;
      color: #fff;
      margin-bottom: 14px;
    }
    .tech-header p {
      color: #94a3b8;
      font-size: 15px;
    }
    .tech-flow-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .tech-flow-card {
      background: var(--bg-dark-card);
      border: 1px solid var(--border-dark);
      border-radius: var(--radius-md);
      padding: 24px;
      position: relative;
    }
    .flow-step-num {
      font-family: var(--font-mono);
      font-size: 13px;
      color: var(--primary);
      font-weight: 700;
      margin-bottom: 10px;
    }
    .tech-flow-card h4 {
      font-size: 16px;
      font-weight: 700;
      color: #fff;
      margin-bottom: 8px;
    }
    .tech-flow-card p {
      font-size: 13px;
      color: #94a3b8;
      line-height: 1.6;
    }

    /* 7. 进行中与规划中能力 */
    .roadmap-section {
      background-color: var(--bg-alt);
    }
    .roadmap-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 30px;
    }
    .roadmap-col {
      background: var(--bg);
      border-radius: var(--radius-lg);
      padding: 30px;
      border: 1px solid var(--border);
    }
    .roadmap-col-header {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 24px;
      padding-bottom: 16px;
      border-bottom: 2px solid var(--border);
    }
    .roadmap-col-header h3 {
      font-size: 20px;
      font-weight: 700;
      color: var(--secondary);
    }
    .badge-in-progress {
      background: #fef3c7;
      color: #d97706;
      font-size: 12px;
      font-weight: 700;
      padding: 2px 8px;
      border-radius: 4px;
    }
    .badge-planned {
      background: #e0f2fe;
      color: #0284c7;
      font-size: 12px;
      font-weight: 700;
      padding: 2px 8px;
      border-radius: 4px;
    }
    .roadmap-item {
      margin-bottom: 20px;
      padding-bottom: 16px;
      border-bottom: 1px dashed var(--border);
    }
    .roadmap-item:last-child {
      margin-bottom: 0;
      padding-bottom: 0;
      border-bottom: none;
    }
    .roadmap-item h4 {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 6px;
      color: var(--secondary);
    }
    .roadmap-item p {
      font-size: 14px;
      color: var(--text-muted);
    }

    /* 8. 真实业务案例 */
    .case-section {
      background-color: var(--bg);
    }
    .case-card {
      background: #fff;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border);
      overflow: hidden;
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      box-shadow: var(--shadow-sm);
    }
    .case-body {
      padding: 40px;
    }
    .case-tag {
      font-size: 13px;
      color: var(--primary);
      font-weight: 700;
      margin-bottom: 8px;
    }
    .case-title {
      font-size: 24px;
      font-weight: 800;
      color: var(--secondary);
      margin-bottom: 16px;
    }
    .case-desc {
      font-size: 15px;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 24px;
    }
    .case-img {
      background: #0f172a;
    }
    .case-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    /* 9. 关键指标统计条 */
    .metrics-bar-section {
      background: linear-gradient(135deg, hsl(215, 65%, 20%), hsl(222, 35%, 12%));
      color: #fff;
      padding: 60px 0;
    }
    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      text-align: center;
    }
    .metric-item strong {
      display: block;
      font-family: var(--font-mono);
      font-size: 44px;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 6px;
    }
    .metric-item span {
      font-size: 15px;
      color: #cbd5e1;
    }

    /* 10. 用户与机构口碑 */
    .reviews-section {
      background-color: var(--bg-alt);
    }
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .review-card {
      background: var(--bg);
      border-radius: var(--radius-md);
      padding: 26px;
      border: 1px solid var(--border);
    }
    .stars {
      color: #f59e0b;
      margin-bottom: 12px;
      font-size: 16px;
    }
    .review-text {
      font-size: 14px;
      color: var(--text);
      line-height: 1.65;
      margin-bottom: 20px;
    }
    .review-author {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .author-avatar {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: #cbd5e1;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: var(--secondary);
    }
    .author-info h5 {
      font-size: 15px;
      font-weight: 700;
      color: var(--secondary);
    }
    .author-info p {
      font-size: 12px;
      color: var(--text-muted);
    }

    /* 11. 更新日志与版本记录 */
    .changelog-section {
      background-color: var(--bg);
    }
    .timeline {
      max-width: 800px;
      margin: 0 auto;
      position: relative;
      padding-left: 32px;
    }
    .timeline::before {
      content: "";
      position: absolute;
      top: 0;
      bottom: 0;
      left: 7px;
      width: 2px;
      background: #cbd5e1;
    }
    .timeline-item {
      position: relative;
      margin-bottom: 36px;
    }
    .timeline-item:last-child {
      margin-bottom: 0;
    }
    .timeline-item::before {
      content: "";
      position: absolute;
      left: -32px;
      top: 6px;
      width: 16px;
      height: 16px;
      border-radius: 50%;
      background: var(--bg);
      border: 3px solid var(--primary);
    }
    .timeline-date {
      font-family: var(--font-mono);
      font-size: 13px;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 6px;
    }
    .timeline-content {
      background: #fff;
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 20px 24px;
      box-shadow: var(--shadow-sm);
    }
    .timeline-content h4 {
      font-size: 17px;
      font-weight: 700;
      color: var(--secondary);
      margin-bottom: 8px;
    }
    .timeline-content p {
      font-size: 14px;
      color: var(--text-muted);
    }

    /* 12. 体育资讯与赛事实况摘要 */
    .insights-section {
      background-color: var(--bg-alt);
    }
    .insights-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
      margin-bottom: 40px;
    }
    .insight-card {
      background: var(--bg);
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border);
      display: flex;
      flex-direction: column;
      transition: transform 0.25s ease;
    }
    .insight-card:hover {
      transform: translateY(-4px);
    }
    .insight-thumb {
      height: 180px;
      overflow: hidden;
      position: relative;
    }
    .insight-thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    .insight-badge {
      position: absolute;
      top: 12px;
      left: 12px;
      background: rgba(15, 23, 42, 0.85);
      color: #fff;
      font-size: 12px;
      padding: 3px 8px;
      border-radius: 4px;
      backdrop-filter: blur(4px);
    }
    .insight-body {
      padding: 20px;
      flex: 1;
      display: flex;
      flex-direction: column;
    }
    .insight-body h4 {
      font-size: 17px;
      font-weight: 700;
      color: var(--secondary);
      margin-bottom: 10px;
      line-height: 1.4;
    }
    .insight-body p {
      font-size: 14px;
      color: var(--text-muted);
      flex: 1;
      margin-bottom: 16px;
    }
    .insight-date {
      font-size: 12px;
      color: #94a3b8;
    }
    .insights-action {
      text-align: center;
    }

    /* 13. 平台常见疑问 FAQ */
    .faq-section {
      background-color: var(--bg);
    }
    .faq-list {
      max-width: 840px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .faq-card {
      background: #fff;
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: all 0.2s ease;
    }
    .faq-card.active {
      border-color: var(--primary);
      background-color: #fafdfb;
    }
    .faq-question {
      padding: 20px 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      user-select: none;
    }
    .faq-question h4 {
      font-size: 16px;
      font-weight: 700;
      color: var(--secondary);
    }
    .faq-icon {
      font-size: 20px;
      color: var(--primary);
      font-weight: 700;
      transition: transform 0.25s ease;
    }
    .faq-card.active .faq-icon {
      transform: rotate(45deg);
    }
    .faq-answer {
      display: none;
      padding: 0 24px 20px 24px;
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
    }
    .faq-card.active .faq-answer {
      display: block;
    }

    /* 14. 沉浸式收口行动区与更新订阅 */
    .cta-section {
      background: linear-gradient(135deg, #070a0e 0%, #111827 100%);
      color: #fff;
      padding: 80px 0;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
    }
    .cta-box {
      max-width: 760px;
      margin: 0 auto;
      text-align: center;
    }
    .cta-box h2 {
      font-size: 34px;
      font-weight: 800;
      margin-bottom: 16px;
    }
    .cta-box p {
      font-size: 16px;
      color: #94a3b8;
      margin-bottom: 32px;
      line-height: 1.7;
    }
    .cta-form {
      display: flex;
      gap: 12px;
      max-width: 520px;
      margin: 0 auto 28px;
    }
    .cta-input {
      flex: 1;
      padding: 14px 18px;
      border-radius: var(--radius-sm);
      border: 1px solid rgba(255, 255, 255, 0.2);
      background: rgba(255, 255, 255, 0.06);
      color: #fff;
      font-size: 14px;
      outline: none;
    }
    .cta-input:focus {
      border-color: var(--primary);
      background: rgba(255, 255, 255, 0.1);
    }
    .cta-guarantees {
      display: flex;
      justify-content: center;
      gap: 28px;
      font-size: 13px;
      color: #64748b;
    }

    /* 页脚 */
    footer.site-footer {
      background-color: var(--bg-dark);
      color: #94a3b8;
      padding: 70px 0 30px;
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      font-size: 14px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
      gap: 40px;
      margin-bottom: 50px;
    }
    .footer-brand h4 {
      font-size: 18px;
      font-weight: 800;
      color: #fff;
      margin-bottom: 14px;
    }
    .footer-brand p {
      font-size: 13px;
      line-height: 1.7;
      margin-bottom: 16px;
    }
    .footer-col h5 {
      font-size: 15px;
      font-weight: 700;
      color: #fff;
      margin-bottom: 16px;
    }
    .footer-links {
      list-style: none;
    }
    .footer-links li {
      margin-bottom: 10px;
    }
    .footer-links a:hover {
      color: var(--primary);
    }
    .contact-item {
      margin-bottom: 10px;
      font-size: 13px;
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.06);
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 13px;
      color: #64748b;
    }

    /* 移动端菜单抽屉与响应式 */
    .mobile-drawer {
      display: none;
      position: fixed;
      top: 72px;
      left: 0;
      right: 0;
      bottom: 0;
      background: rgba(12, 16, 23, 0.96);
      backdrop-filter: blur(20px);
      z-index: 99;
      flex-direction: column;
      padding: 30px 24px;
      gap: 20px;
    }
    .mobile-drawer a {
      color: #fff;
      font-size: 18px;
      font-weight: 600;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
      padding-bottom: 12px;
    }
    .mobile-drawer.active {
      display: flex;
    }

    @media (max-width: 1024px) {
      .hero-grid,
      .challenges-grid,
      .solutions-grid,
      .case-card,
      .roadmap-grid {
        grid-template-columns: 1fr;
      }
      .features-grid,
      .products-grid,
      .tech-flow-grid,
      .reviews-grid,
      .insights-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .metrics-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 30px;
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      .top-bar { display: none; }
      .main-nav { display: none; }
      .menu-toggle { display: block; }
      .hero-content h1 { font-size: 32px; }
      .section-title { font-size: 26px; }
      .features-grid,
      .products-grid,
      .tech-flow-grid,
      .reviews-grid,
      .insights-grid {
        grid-template-columns: 1fr;
      }
      .metrics-grid {
        grid-template-columns: 1fr 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
        gap: 30px;
      }
      .footer-bottom {
        flex-direction: column;
        gap: 12px;
        text-align: center;
      }
      .cta-form {
        flex-direction: column;
      }
      .hero-stats-row {
        flex-direction: column;
        gap: 16px;
      }
    }