:root {
      --primary: #4f46e5;
      --primary-dark: #3730a3;
      --primary-light: #6366f1;
      --secondary: #ec4899;
      --accent: #06b6d4;
      --accent-warm: #f59e0b;
      --bg-page: #f8fafc;
      --bg-card: #ffffff;
      --text-main: #0f172a;
      --text-muted: #475569;
      --border-color: #e2e8f0;
      --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.05);
      --shadow-md: 0 10px 25px -5px rgba(15, 23, 42, 0.08);
      --shadow-lg: 0 20px 35px -10px rgba(15, 23, 42, 0.12);
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
    }
    *, *::before, *::after {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-page);
      color: var(--text-main);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: all 0.25s ease;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    .container {
      width: 100%;
      max-width: 1200px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }
    .section-wrap {
      padding-top: 80px;
      padding-bottom: 80px;
      border-bottom: 1px solid var(--border-color);
      background-color: var(--bg-page);
    }
    .section-wrap.alt-bg {
      background-color: #ffffff;
    }
    .section-header {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 50px auto;
    }
    .section-badge {
      display: inline-block;
      padding: 6px 14px;
      background: linear-gradient(135deg, rgba(79, 70, 229, 0.1), rgba(236, 72, 153, 0.1));
      color: var(--primary);
      font-size: 0.875rem;
      font-weight: 600;
      border-radius: 9999px;
      margin-bottom: 12px;
      letter-spacing: 0.5px;
    }
    .section-title {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--text-main);
      line-height: 1.3;
      margin-bottom: 16px;
    }
    .section-desc {
      font-size: 1.05rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(226, 232, 240, 0.8);
      box-shadow: 0 1px 10px rgba(0,0,0,0.03);
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .brand-logo img {
      max-height: 42px;
      width: auto;
    }
    .brand-text {
      font-size: 1.35rem;
      font-weight: 800;
      color: var(--primary-dark);
      letter-spacing: -0.5px;
    }
    .nav-links {
      display: flex;
      gap: 0;
      list-style: none;
      align-items: center;
    }
    .nav-links li a {
      padding: 8px 12px;
      font-weight: 600;
      font-size: 0.95rem;
      color: var(--text-muted);
      border-radius: var(--radius-sm);
    }
    .nav-links li a:hover {
      color: var(--primary);
      background: rgba(79, 70, 229, 0.05);
    }
    .nav-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      font-size: 0.95rem;
      font-weight: 600;
      border-radius: var(--radius-md);
      transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
      cursor: pointer;
      border: 1px solid transparent;
      text-align: center;
    }
    .btn-primary {
      background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
      color: #ffffff;
      box-shadow: 0 4px 14px rgba(79, 70, 229, 0.3);
    }
    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(79, 70, 229, 0.4);
      color: #ffffff;
    }
    .btn-outline {
      border-color: var(--border-color);
      background: #ffffff;
      color: var(--text-main);
    }
    .btn-outline:hover {
      border-color: var(--primary);
      color: var(--primary);
      background: rgba(79, 70, 229, 0.03);
    }
    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      font-size: 1.5rem;
      cursor: pointer;
      color: var(--text-main);
      padding: 6px;
    }

    /* Hero 首屏 (严格无图片) */
    .hero-section {
      position: relative;
      overflow: hidden;
      padding: 90px 0 80px 0;
      background: radial-gradient(circle at 10% 20%, rgba(99, 102, 241, 0.08) 0%, rgba(236, 72, 153, 0.05) 50%, rgba(248, 250, 252, 1) 100%);
      border-bottom: 1px solid var(--border-color);
    }
    .hero-content {
      text-align: center;
      max-width: 920px;
      margin: 0 auto;
    }
    .hero-tag {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 8px 18px;
      border-radius: 9999px;
      background: #ffffff;
      border: 1px solid rgba(79, 70, 229, 0.2);
      box-shadow: var(--shadow-sm);
      font-size: 0.9rem;
      font-weight: 700;
      color: var(--primary-dark);
      margin-bottom: 24px;
    }
    .hero-tag-dot {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: var(--secondary);
      box-shadow: 0 0 8px var(--secondary);
    }
    .hero-title {
      font-size: 2.8rem;
      font-weight: 900;
      line-height: 1.25;
      color: var(--text-main);
      margin-bottom: 24px;
      letter-spacing: -1px;
    }
    .hero-title span {
      background: linear-gradient(135deg, #4f46e5 0%, #ec4899 50%, #06b6d4 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-desc {
      font-size: 1.15rem;
      color: var(--text-muted);
      line-height: 1.8;
      max-width: 780px;
      margin: 0 auto 36px auto;
    }
    .hero-btns {
      display: flex;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 48px;
    }
    .hero-btn-large {
      padding: 14px 34px;
      font-size: 1.05rem;
      font-weight: 700;
    }
    .hero-stats {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      margin-top: 20px;
    }
    .stat-card {
      background: rgba(255, 255, 255, 0.85);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 20px 16px;
      box-shadow: var(--shadow-sm);
      backdrop-filter: blur(8px);
      transition: transform 0.25s ease;
    }
    .stat-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: rgba(79, 70, 229, 0.3);
    }
    .stat-num {
      font-size: 1.75rem;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 4px;
    }
    .stat-label {
      font-size: 0.875rem;
      color: var(--text-muted);
      font-weight: 600;
    }

    /* 品牌模型聚合池 */
    .model-tags-wrap {
      padding: 40px 0;
      background: #ffffff;
      border-bottom: 1px solid var(--border-color);
    }
    .model-title {
      text-align: center;
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--text-muted);
      text-transform: uppercase;
      letter-spacing: 1px;
      margin-bottom: 20px;
    }
    .tag-cloud {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 10px;
    }
    .model-badge {
      background: var(--bg-page);
      border: 1px solid var(--border-color);
      padding: 6px 14px;
      border-radius: 9999px;
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--text-main);
      transition: all 0.2s ease;
    }
    .model-badge:hover {
      background: var(--primary);
      color: #ffffff;
      border-color: var(--primary);
      transform: translateY(-2px);
    }

    /* 网格卡片与通用组件 */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }
    .grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .service-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
      display: flex;
      flex-direction: column;
      height: 100%;
    }
    .service-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-lg);
      border-color: rgba(79, 70, 229, 0.3);
    }
    .card-icon-box {
      width: 48px;
      height: 48px;
      border-radius: 12px;
      background: linear-gradient(135deg, rgba(79, 70, 229, 0.15), rgba(236, 72, 153, 0.15));
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.3rem;
      font-weight: 800;
      margin-bottom: 20px;
    }
    .service-card h3 {
      font-size: 1.25rem;
      font-weight: 700;
      margin-bottom: 12px;
      color: var(--text-main);
    }
    .service-card p {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.6;
      flex-grow: 1;
    }

    /* 对比评测高亮卡片 */
    .eval-highlight {
      background: linear-gradient(135deg, #1e1b4b 0%, #312e81 100%);
      color: #ffffff;
      border-radius: var(--radius-lg);
      padding: 40px;
      margin-bottom: 40px;
      box-shadow: var(--shadow-lg);
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 24px;
    }
    .eval-score-box {
      display: flex;
      align-items: center;
      gap: 20px;
    }
    .score-big {
      font-size: 3.5rem;
      font-weight: 900;
      color: #facc15;
      line-height: 1;
    }
    .score-stars {
      color: #facc15;
      font-size: 1.3rem;
      margin-bottom: 4px;
    }
    .score-label {
      font-size: 1rem;
      color: #cbd5e1;
    }
    .eval-features {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 16px;
      max-width: 550px;
    }
    .eval-feat-item {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 0.95rem;
      color: #f1f5f9;
    }
    .check-icon {
      color: #10b981;
      font-weight: bold;
    }

    /* 对比表格 */
    .table-container {
      width: 100%;
      overflow-x: auto;
      background: #ffffff;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }
    .comparison-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 700px;
    }
    .comparison-table th, .comparison-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
      font-size: 0.95rem;
    }
    .comparison-table th {
      background: #f8fafc;
      font-weight: 700;
      color: var(--text-main);
    }
    .comparison-table tr:hover {
      background: rgba(79, 70, 229, 0.02);
    }
    .badge-highlight {
      display: inline-block;
      padding: 4px 10px;
      border-radius: 6px;
      font-size: 0.85rem;
      font-weight: 700;
      background: rgba(16, 185, 129, 0.12);
      color: #047857;
    }

    /* 流程步骤 */
    .step-card {
      position: relative;
      background: #ffffff;
      padding: 28px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }
    .step-badge {
      font-size: 2rem;
      font-weight: 900;
      color: rgba(79, 70, 229, 0.2);
      line-height: 1;
      margin-bottom: 12px;
    }
    .step-card h4 {
      font-size: 1.15rem;
      font-weight: 700;
      margin-bottom: 10px;
    }

    /* 图文展示区 */
    .gallery-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }
    .gallery-card {
      background: #ffffff;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }
    .gallery-img-wrap {
      width: 100%;
      height: 240px;
      overflow: hidden;
      background: #e2e8f0;
    }
    .gallery-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }
    .gallery-card:hover .gallery-img-wrap img {
      transform: scale(1.04);
    }
    .gallery-info {
      padding: 20px;
    }
    .gallery-info h4 {
      font-size: 1.15rem;
      font-weight: 700;
      margin-bottom: 8px;
    }
    .gallery-info p {
      font-size: 0.9rem;
      color: var(--text-muted);
    }

    /* 用户评论 */
    .review-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .review-text {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 20px;
      font-style: italic;
    }
    .reviewer-meta {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid var(--border-color);
      padding-top: 16px;
    }
    .reviewer-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1.1rem;
    }
    .reviewer-name {
      font-weight: 700;
      font-size: 0.95rem;
      color: var(--text-main);
    }
    .reviewer-role {
      font-size: 0.85rem;
      color: var(--text-muted);
    }

    /* FAQ 手风琴 */
    .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;
      box-shadow: var(--shadow-sm);
    }
    .faq-question {
      padding: 20px 24px;
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--text-main);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
      transition: background-color 0.2s ease;
    }
    .faq-question:hover {
      background-color: rgba(79, 70, 229, 0.02);
    }
    .faq-icon {
      font-size: 1.2rem;
      transition: transform 0.3s ease;
      color: var(--primary);
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease, padding 0.35s ease;
      padding: 0 24px;
      color: var(--text-muted);
      font-size: 0.95rem;
      line-height: 1.7;
    }
    .faq-item.active .faq-answer {
      max-height: 300px;
      padding: 0 24px 20px 24px;
      border-top: 1px solid #f1f5f9;
    }

    /* 需求匹配表单与联系 */
    .form-contact-wrap {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 36px;
      align-items: start;
    }
    .contact-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 32px;
      box-shadow: var(--shadow-sm);
    }
    .qr-box {
      margin-top: 24px;
      padding: 20px;
      background: var(--bg-page);
      border-radius: var(--radius-sm);
      text-align: center;
      display: inline-block;
      border: 1px dashed var(--border-color);
    }
    .qr-box img {
      width: 140px;
      height: 140px;
      margin: 0 auto 10px auto;
      border-radius: 6px;
    }
    .form-group {
      margin-bottom: 18px;
    }
    .form-group label {
      display: block;
      font-size: 0.9rem;
      font-weight: 700;
      margin-bottom: 6px;
      color: var(--text-main);
    }
    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 0.95rem;
      outline: none;
      transition: border-color 0.2s ease, box-shadow 0.2s ease;
    }
    .form-control:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.15);
    }
    textarea.form-control {
      min-height: 110px;
      resize: vertical;
    }

    /* 最新文章与资讯 */
    .article-list {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
      margin-bottom: 24px;
    }
    .article-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .article-item h4 {
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 12px;
      line-height: 1.4;
      color: var(--text-main);
    }
    .article-item h4 a:hover {
      color: var(--primary);
    }
    .article-links-row {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 16px;
      padding: 16px;
      background: #ffffff;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
    }
    .article-links-row a {
      font-size: 0.85rem;
      color: var(--primary);
      text-decoration: underline;
    }

    /* 友情链接与页脚 */
    .links-section {
      padding: 30px 0;
      background: #ffffff;
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
    }
    .links-wrap {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      align-items: center;
    }
    .links-title {
      font-size: 0.9rem;
      font-weight: 700;
      color: var(--text-main);
    }
    .links-wrap a {
      font-size: 0.875rem;
      color: var(--text-muted);
      padding: 4px 10px;
      background: var(--bg-page);
      border-radius: 4px;
    }
    .links-wrap a:hover {
      color: var(--primary);
      background: rgba(79, 70, 229, 0.08);
    }

    .site-footer {
      background: #0f172a;
      color: #94a3b8;
      padding: 50px 0 30px 0;
    }
    .footer-content {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 36px;
      margin-bottom: 40px;
    }
    .footer-brand h3 {
      color: #ffffff;
      font-size: 1.4rem;
      margin-bottom: 12px;
      font-weight: 800;
    }
    .footer-col h4 {
      color: #ffffff;
      font-size: 1.05rem;
      margin-bottom: 16px;
      font-weight: 700;
    }
    .footer-col ul {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-col ul li a {
      color: #94a3b8;
      font-size: 0.9rem;
    }
    .footer-col ul li a:hover {
      color: #ffffff;
    }
    .footer-bottom {
      border-top: 1px solid #334155;
      padding-top: 24px;
      text-align: center;
      font-size: 0.85rem;
      color: #64748b;
    }

    /* 悬浮工具栏 */
    .float-widget {
      position: fixed;
      right: 24px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .float-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: #ffffff;
      color: var(--text-main);
      box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      border: 1px solid var(--border-color);
      transition: all 0.25s ease;
      font-weight: 700;
      font-size: 0.85rem;
    }
    .float-btn.primary {
      background: var(--primary);
      color: #ffffff;
      border: none;
    }
    .float-btn:hover {
      transform: translateY(-3px);
      box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
    }

    /* 响应式调整 */
    @media (max-width: 992px) {
      .grid-3, .grid-4, .hero-stats, .article-list {
        grid-template-columns: repeat(2, 1fr);
      }
      .gallery-grid, .form-contact-wrap {
        grid-template-columns: 1fr;
      }
      .footer-content {
        grid-template-columns: 1fr 1fr;
      }
      .hero-title {
        font-size: 2.2rem;
      }
      .nav-links {
        display: none;
      }
      .mobile-menu-btn {
        display: block;
      }
    }
    @media (max-width: 640px) {
      .grid-2, .grid-3, .grid-4, .hero-stats, .article-list, .eval-features {
        grid-template-columns: 1fr;
      }
      .footer-content {
        grid-template-columns: 1fr;
      }
      .hero-title {
        font-size: 1.85rem;
      }
      .section-wrap {
        padding-top: 50px;
        padding-bottom: 50px;
      }
      .eval-highlight {
        padding: 24px;
      }
    }