:root {
      --primary: #0f4c81;
      --primary-bright: #1a6dff;
      --primary-light: #eef5ff;
      --primary-dark: #0a2d4d;
      --accent: #00c2ff;
      --text-main: #1e293b;
      --text-muted: #64748b;
      --border-color: #e2e8f0;
      --bg-page: #f8fafc;
      --bg-card: #ffffff;
      --shadow-sm: 0 2px 4px rgba(15, 76, 129, 0.04);
      --shadow-md: 0 8px 24px rgba(15, 76, 129, 0.08);
      --shadow-lg: 0 16px 36px rgba(15, 76, 129, 0.12);
      --radius: 12px;
      --transition: all 0.25s ease;
    }

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

    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-page);
      color: var(--text-main);
      line-height: 1.6;
    }

    body {
      background-color: var(--bg-page);
      overflow-x: hidden;
    }

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

    .container {
      max-width: 1200px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
      width: 100%;
    }

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border-color);
    }

    .nav-wrap {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }

    .brand {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .brand-logo-box {
      width: 130px;
      display: flex;
      align-items: center;
    }

    .brand-logo-box img {
      max-width: 100%;
      height: auto;
      display: block;
    }

    .nav-links {
      display: flex;
      align-items: center;
      list-style: none;
      gap: 0;
    }

    .nav-links li a {
      font-size: 14px;
      font-weight: 500;
      color: var(--text-main);
      padding: 8px 12px;
      border-radius: 6px;
      display: block;
    }

    .nav-links li a:hover {
      color: var(--primary-bright);
      background-color: var(--primary-light);
    }

    .nav-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 20px;
      font-size: 14px;
      font-weight: 600;
      border-radius: 8px;
      cursor: pointer;
      border: 1px solid transparent;
      transition: var(--transition);
      text-align: center;
    }

    .btn-primary {
      background: linear-gradient(135deg, var(--primary-bright), var(--primary));
      color: #ffffff;
      box-shadow: 0 4px 12px rgba(26, 109, 255, 0.25);
    }

    .btn-primary:hover {
      background: linear-gradient(135deg, #2b79ff, #0a3d6d);
      transform: translateY(-1px);
      box-shadow: 0 6px 16px rgba(26, 109, 255, 0.35);
    }

    .btn-outline {
      border-color: var(--primary-bright);
      color: var(--primary-bright);
      background: #ffffff;
    }

    .btn-outline:hover {
      background: var(--primary-light);
    }

    .menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 24px;
      color: var(--text-main);
      cursor: pointer;
    }

    /* 首屏 Hero (严禁图片) */
    .hero-section {
      background: radial-gradient(circle at 85% 15%, rgba(0, 194, 255, 0.08) 0%, transparent 40%),
                  linear-gradient(180deg, #eef5ff 0%, #ffffff 100%);
      padding: 80px 0 60px;
      border-bottom: 1px solid var(--border-color);
      position: relative;
    }

    .hero-content {
      text-align: center;
      max-width: 900px;
      margin: 0 auto;
    }

    .hero-tag {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 16px;
      background-color: rgba(26, 109, 255, 0.1);
      color: var(--primary-bright);
      font-size: 13px;
      font-weight: 600;
      border-radius: 30px;
      margin-bottom: 20px;
      border: 1px solid rgba(26, 109, 255, 0.2);
    }

    .hero-title {
      font-size: 40px;
      font-weight: 800;
      color: var(--primary-dark);
      line-height: 1.25;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

    .hero-subtitle {
      font-size: 18px;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 36px;
    }

    .hero-buttons {
      display: flex;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 48px;
    }

    .hero-btn-main {
      padding: 14px 32px;
      font-size: 16px;
      background: linear-gradient(135deg, #1a6dff, #0f4c81);
      color: #ffffff;
      border-radius: 8px;
      box-shadow: 0 6px 20px rgba(26, 109, 255, 0.35);
      border: none;
      font-weight: 600;
    }

    .hero-btn-main:hover {
      box-shadow: 0 8px 24px rgba(26, 109, 255, 0.45);
      transform: translateY(-2px);
    }

    .hero-stats {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: 20px;
    }

    .stat-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      padding: 20px;
      border-radius: var(--radius);
      box-shadow: var(--shadow-sm);
      text-align: center;
    }

    .stat-num {
      font-size: 32px;
      font-weight: 800;
      color: var(--primary-bright);
      line-height: 1;
      margin-bottom: 8px;
    }

    .stat-label {
      font-size: 13px;
      color: var(--text-muted);
    }

    /* 通用区块与标题 */
    .section-wrap {
      padding: 80px 0;
      border-bottom: 1px solid var(--border-color);
      background-color: var(--bg-card);
    }

    .section-wrap.alt-bg {
      background-color: #f1f5f9;
    }

    .section-header {
      text-align: center;
      max-width: 720px;
      margin: 0 auto 48px;
    }

    .section-subtitle {
      font-size: 13px;
      font-weight: 700;
      text-transform: uppercase;
      color: var(--primary-bright);
      letter-spacing: 1.5px;
      margin-bottom: 8px;
      display: block;
    }

    .section-title {
      font-size: 30px;
      font-weight: 800;
      color: var(--primary-dark);
      margin-bottom: 14px;
    }

    .section-desc {
      font-size: 15px;
      color: var(--text-muted);
    }

    /* 网格与卡片 */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 32px;
      align-items: center;
    }

    .feature-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px;
      transition: var(--transition);
      box-shadow: var(--shadow-sm);
    }

    .feature-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: rgba(26, 109, 255, 0.4);
    }

    .card-icon-pill {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 44px;
      height: 44px;
      background: var(--primary-light);
      color: var(--primary-bright);
      border-radius: 10px;
      font-weight: 800;
      font-size: 18px;
      margin-bottom: 16px;
    }

    .feature-card h3 {
      font-size: 18px;
      color: var(--primary-dark);
      margin-bottom: 10px;
      font-weight: 700;
    }

    .feature-card p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 平台支持标签云 */
    .models-chip-grid {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      margin-top: 30px;
    }

    .model-chip {
      background: #ffffff;
      border: 1px solid var(--border-color);
      padding: 8px 16px;
      border-radius: 20px;
      font-size: 13px;
      font-weight: 600;
      color: var(--text-main);
      box-shadow: var(--shadow-sm);
    }

    /* 响应式图片展示容器 */
    .media-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }

    .media-card-img-wrap {
      width: 100%;
      background: #e2e8f0;
    }

    .media-card-img-wrap img {
      width: 100%;
      height: auto;
      display: block;
      object-fit: cover;
    }

    .media-card-body {
      padding: 20px;
    }

    .media-card-body h4 {
      font-size: 16px;
      margin-bottom: 8px;
      color: var(--primary-dark);
    }

    /* 评测与对比表格 */
    .rating-banner {
      background: linear-gradient(135deg, #0f4c81, #1a6dff);
      color: #ffffff;
      border-radius: var(--radius);
      padding: 30px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 30px;
      flex-wrap: wrap;
      gap: 20px;
    }

    .rating-info h3 {
      font-size: 24px;
      font-weight: 700;
      margin-bottom: 6px;
    }

    .rating-score {
      font-size: 48px;
      font-weight: 900;
      color: #ffd166;
      line-height: 1;
    }

    .table-container {
      width: 100%;
      overflow-x: auto;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      box-shadow: var(--shadow-sm);
    }

    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 640px;
    }

    .compare-table th, .compare-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
      font-size: 14px;
    }

    .compare-table th {
      background: #f8fafc;
      font-weight: 700;
      color: var(--primary-dark);
    }

    .compare-table tr:last-child td {
      border-bottom: none;
    }

    .highlight-col {
      background: rgba(26, 109, 255, 0.03);
      font-weight: 600;
      color: var(--primary-bright);
    }

    /* 流程时间线 */
    .flow-steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }

    .flow-step-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px 20px;
      position: relative;
    }

    .flow-step-num {
      width: 32px;
      height: 32px;
      background: var(--primary-bright);
      color: #ffffff;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      margin-bottom: 14px;
    }

    /* 表单与需求匹配 */
    .form-container {
      max-width: 680px;
      margin: 0 auto;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 36px;
      box-shadow: var(--shadow-md);
    }

    .form-group {
      margin-bottom: 20px;
    }

    .form-group label {
      display: block;
      font-size: 14px;
      font-weight: 600;
      margin-bottom: 8px;
      color: var(--primary-dark);
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      font-size: 14px;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      background: #f8fafc;
      color: var(--text-main);
      outline: none;
      transition: var(--transition);
    }

    .form-control:focus {
      border-color: var(--primary-bright);
      background: #ffffff;
      box-shadow: 0 0 0 3px rgba(26, 109, 255, 0.15);
    }

    textarea.form-control {
      resize: vertical;
      min-height: 100px;
    }

    /* FAQ 手风琴 */
    .faq-list {
      max-width: 860px;
      margin: 0 auto;
    }

    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      margin-bottom: 12px;
      overflow: hidden;
      transition: var(--transition);
    }

    .faq-question {
      padding: 18px 20px;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-weight: 600;
      color: var(--primary-dark);
      user-select: none;
    }

    .faq-question:hover {
      background: var(--primary-light);
    }

    .faq-icon {
      font-size: 18px;
      color: var(--primary-bright);
      transition: transform 0.2s ease;
    }

    .faq-answer {
      padding: 0 20px 18px;
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
      display: none;
    }

    .faq-item.active .faq-answer {
      display: block;
    }

    .faq-item.active .faq-icon {
      transform: rotate(45deg);
    }

    /* 用户评论 */
    .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);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .review-text {
      font-size: 14px;
      color: var(--text-main);
      line-height: 1.7;
      margin-bottom: 16px;
    }

    .review-author {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid var(--border-color);
      padding-top: 14px;
    }

    .author-badge {
      width: 38px;
      height: 38px;
      background: var(--primary-light);
      color: var(--primary-bright);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 14px;
    }

    .author-meta h5 {
      font-size: 14px;
      color: var(--primary-dark);
    }

    .author-meta span {
      font-size: 12px;
      color: var(--text-muted);
    }

    /* 资讯与链接区 */
    .article-links {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      justify-content: center;
      margin-top: 16px;
    }

    .article-chip {
      padding: 8px 16px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 6px;
      font-size: 13px;
      color: var(--primary);
    }

    .article-chip:hover {
      border-color: var(--primary-bright);
      color: var(--primary-bright);
    }

    /* 页脚 */
    .site-footer {
      background: #0a2d4d;
      color: #94a3b8;
      padding: 60px 0 30px;
      border-top: 1px solid rgba(255, 255, 255, 0.1);
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
      margin-bottom: 40px;
    }

    .footer-col h4 {
      color: #ffffff;
      font-size: 16px;
      margin-bottom: 16px;
      font-weight: 600;
    }

    .footer-col p {
      font-size: 13px;
      line-height: 1.8;
      margin-bottom: 10px;
    }

    .footer-col ul {
      list-style: none;
    }

    .footer-col ul li {
      margin-bottom: 8px;
    }

    .footer-col ul li a {
      color: #94a3b8;
      font-size: 13px;
    }

    .footer-col ul li a:hover {
      color: #ffffff;
    }

    .footer-qr {
      width: 110px;
      background: #ffffff;
      padding: 6px;
      border-radius: 6px;
    }

    .footer-qr img {
      width: 100%;
      height: auto;
      display: block;
    }

    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 12px;
      font-size: 13px;
    }

    .friend-links {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      align-items: center;
    }

    .friend-links a {
      color: #cbd5e1;
    }

    .friend-links a:hover {
      color: #38bdf8;
    }

    /* 悬浮客服 */
    .floating-contact {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-btn {
      width: 48px;
      height: 48px;
      background: var(--primary-bright);
      color: #ffffff;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: var(--shadow-lg);
      cursor: pointer;
      border: none;
      font-size: 18px;
      transition: var(--transition);
    }

    .float-btn:hover {
      background: var(--primary-dark);
      transform: scale(1.05);
    }

    .qr-modal {
      position: absolute;
      right: 60px;
      bottom: 0;
      background: #ffffff;
      padding: 12px;
      border-radius: 8px;
      box-shadow: var(--shadow-lg);
      border: 1px solid var(--border-color);
      display: none;
      width: 140px;
      text-align: center;
    }

    .qr-modal img {
      width: 100%;
      height: auto;
      display: block;
      margin-bottom: 6px;
    }

    .qr-modal span {
      font-size: 12px;
      color: var(--text-main);
      font-weight: 600;
    }

    .floating-contact:hover .qr-modal {
      display: block;
    }

    /* 响应式断点 */
    @media (max-width: 1024px) {
      .grid-4, .hero-stats, .flow-steps {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-3, .review-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 768px) {
      .menu-toggle {
        display: block;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #ffffff;
        flex-direction: column;
        padding: 16px 20px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
      }
      .nav-links.show {
        display: flex;
      }
      .hero-title {
        font-size: 28px;
      }
      .hero-stats, .grid-4, .grid-3, .grid-2, .flow-steps, .review-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .footer-bottom {
        flex-direction: column;
        align-items: flex-start;
      }
    }