:root {
      --primary-color: #ff2a85;
      --primary-gradient: linear-gradient(135deg, #ff007a 0%, #7928ca 50%, #0070f3 100%);
      --accent-color: #00f0ff;
      --accent-warm: #ff8a00;
      --bg-page: #f8fafc;
      --bg-surface: #ffffff;
      --bg-alt: #f1f5f9;
      --text-main: #0f172a;
      --text-muted: #475569;
      --text-light: #64748b;
      --border-color: #e2e8f0;
      --border-glow: rgba(255, 0, 122, 0.2);
      --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.05);
      --shadow-md: 0 10px 25px -5px rgba(15, 23, 42, 0.08);
      --shadow-glow: 0 12px 30px rgba(255, 0, 122, 0.15);
      --container-max: 1200px;
      --radius-lg: 18px;
      --radius-md: 12px;
      --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    }

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

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

    body {
      background: radial-gradient(circle at 10% 10%, rgba(255, 0, 122, 0.03) 0%, transparent 40%),
                  radial-gradient(circle at 90% 80%, rgba(0, 112, 243, 0.04) 0%, transparent 50%),
                  var(--bg-page);
      min-height: 100vh;
      overflow-x: hidden;
    }

    .container {
      width: 100%;
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 20px;
    }

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      transition: var(--transition);
    }

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

    .brand-box {
      display: flex;
      align-items: center;
      gap: 12px;
      text-decoration: none;
    }

    .ai-page-logo {
      height: 38px;
      width: auto;
      display: block;
    }

    .brand-name {
      font-size: 20px;
      font-weight: 800;
      letter-spacing: -0.5px;
      background: var(--primary-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

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

    .nav-links li {
      margin: 0;
    }

    .nav-links a {
      display: inline-block;
      padding: 8px 14px;
      font-size: 14px;
      font-weight: 600;
      color: var(--text-muted);
      text-decoration: none;
      transition: var(--transition);
      border-radius: 8px;
    }

    .nav-links a:hover,
    .nav-links a.active {
      color: var(--primary-color);
      background: rgba(255, 42, 133, 0.06);
    }

    .header-cta {
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      font-size: 14px;
      font-weight: 700;
      border-radius: 50px;
      text-decoration: none;
      cursor: pointer;
      border: 1px solid transparent;
      transition: var(--transition);
      white-space: nowrap;
    }

    .btn-gradient {
      background: var(--primary-gradient);
      color: #ffffff;
      box-shadow: 0 4px 15px rgba(255, 0, 122, 0.3);
    }

    .btn-gradient:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 25px rgba(255, 0, 122, 0.45);
      color: #ffffff;
    }

    .btn-outline {
      background: #ffffff;
      color: var(--text-main);
      border: 1px solid var(--border-color);
    }

    .btn-outline:hover {
      border-color: var(--primary-color);
      color: var(--primary-color);
      background: rgba(255, 42, 133, 0.04);
    }

    .mobile-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 24px;
      color: var(--text-main);
      cursor: pointer;
      padding: 4px;
    }

    /* 区域通用样式 */
    section {
      padding: 80px 0;
      position: relative;
    }

    .section-header {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 50px;
    }

    .section-tag {
      display: inline-block;
      padding: 5px 14px;
      font-size: 12px;
      font-weight: 700;
      color: var(--primary-color);
      background: rgba(255, 42, 133, 0.08);
      border: 1px solid rgba(255, 42, 133, 0.2);
      border-radius: 20px;
      margin-bottom: 12px;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }

    .section-title {
      font-size: 32px;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 15px;
      letter-spacing: -0.5px;
    }

    .section-subtitle {
      font-size: 16px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 首屏 HERO 严禁图片纯CSS构建 */
    .hero-section {
      padding: 100px 0 80px;
      background: linear-gradient(180deg, #ffffff 0%, rgba(248, 250, 252, 0.8) 100%);
      position: relative;
      overflow: hidden;
      border-bottom: 1px solid var(--border-color);
    }

    .hero-pattern {
      position: absolute;
      top: 0;
      left: 50%;
      transform: translateX(-50%);
      width: 100%;
      max-width: 1400px;
      height: 100%;
      background: radial-gradient(circle at 50% 0%, rgba(255, 42, 133, 0.08) 0%, transparent 60%);
      pointer-events: none;
    }

    .hero-content {
      position: relative;
      z-index: 2;
      text-align: center;
      max-width: 880px;
      margin: 0 auto;
    }

    .hero-badge-group {
      display: inline-flex;
      align-items: center;
      background: #ffffff;
      padding: 6px 16px;
      border-radius: 50px;
      border: 1px solid rgba(255, 0, 122, 0.3);
      box-shadow: 0 4px 12px rgba(255, 0, 122, 0.08);
      margin-bottom: 24px;
      font-size: 13px;
      font-weight: 700;
      color: var(--text-main);
    }

    .hero-badge-group span {
      background: var(--primary-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      margin-right: 6px;
    }

    .hero-title {
      font-size: 44px;
      line-height: 1.25;
      font-weight: 900;
      color: var(--text-main);
      margin-bottom: 24px;
      letter-spacing: -1px;
    }

    .hero-title .highlight {
      background: var(--primary-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-desc {
      font-size: 18px;
      line-height: 1.8;
      color: var(--text-muted);
      margin-bottom: 36px;
    }

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

    .btn-hero-primary {
      padding: 16px 40px;
      font-size: 17px;
      font-weight: 800;
      letter-spacing: 0.5px;
      background: var(--primary-gradient);
      color: #ffffff;
      border-radius: 50px;
      box-shadow: 0 8px 30px rgba(255, 0, 122, 0.4);
      border: none;
      text-decoration: none;
      display: inline-flex;
      align-items: center;
      gap: 8px;
      transition: var(--transition);
    }

    .btn-hero-primary:hover {
      transform: translateY(-3px) scale(1.02);
      box-shadow: 0 12px 35px rgba(255, 0, 122, 0.55);
      color: #ffffff;
    }

    .hero-stats-panel {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      padding: 24px 30px;
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-md);
    }

    .stat-item {
      text-align: center;
      border-right: 1px solid var(--border-color);
    }

    .stat-item:last-child {
      border-right: none;
    }

    .stat-number {
      font-size: 32px;
      font-weight: 900;
      color: var(--text-main);
      line-height: 1;
      margin-bottom: 6px;
      background: var(--primary-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .stat-label {
      font-size: 13px;
      font-weight: 600;
      color: var(--text-light);
    }

    /* 平台矩阵标签条 */
    .model-tags-bar {
      margin-top: 40px;
      text-align: center;
    }

    .model-tags-title {
      font-size: 13px;
      font-weight: 700;
      color: var(--text-light);
      text-transform: uppercase;
      margin-bottom: 14px;
      letter-spacing: 1px;
    }

    .model-pill-wrap {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 8px;
    }

    .model-pill {
      font-size: 12px;
      padding: 5px 12px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 20px;
      color: var(--text-muted);
      font-weight: 600;
      transition: var(--transition);
    }

    .model-pill:hover {
      border-color: var(--primary-color);
      color: var(--primary-color);
      transform: translateY(-2px);
    }

    /* 通用卡片网格 */
    .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: 30px;
    }

    .card {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }

    .card:hover {
      border-color: rgba(255, 42, 133, 0.35);
      transform: translateY(-4px);
      box-shadow: var(--shadow-glow);
    }

    .card-icon {
      width: 48px;
      height: 48px;
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 18px;
      font-size: 22px;
      background: rgba(255, 42, 133, 0.08);
      color: var(--primary-color);
    }

    .card-title {
      font-size: 18px;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 10px;
    }

    .card-text {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
      flex-grow: 1;
    }

    .card-footer-action {
      margin-top: 16px;
      font-size: 13px;
      font-weight: 700;
      color: var(--primary-color);
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    /* 图文视觉区 */
    .media-card {
      background: #ffffff;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }

    .media-card:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-md);
    }

    .media-img-wrap {
      width: 100%;
      height: 220px;
      overflow: hidden;
      background: var(--bg-alt);
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .media-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.5s ease;
    }

    .media-card:hover .media-img-wrap img {
      transform: scale(1.05);
    }

    .media-body {
      padding: 22px;
    }

    /* 对比评测高亮 */
    .rating-banner {
      background: linear-gradient(135deg, rgba(255, 0, 122, 0.05) 0%, rgba(0, 112, 243, 0.05) 100%);
      border: 2px solid rgba(255, 42, 133, 0.25);
      border-radius: var(--radius-lg);
      padding: 30px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 30px;
      flex-wrap: wrap;
      gap: 20px;
    }

    .rating-left {
      display: flex;
      align-items: center;
      gap: 20px;
    }

    .score-badge {
      font-size: 42px;
      font-weight: 900;
      background: var(--primary-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      line-height: 1;
    }

    .stars {
      color: #ff9900;
      font-size: 20px;
      letter-spacing: 2px;
    }

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

    .custom-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
    }

    .custom-table th,
    .custom-table td {
      padding: 18px 24px;
      border-bottom: 1px solid var(--border-color);
      font-size: 14px;
    }

    .custom-table th {
      background: var(--bg-alt);
      font-weight: 700;
      color: var(--text-main);
    }

    .custom-table tr:hover td {
      background: rgba(255, 42, 133, 0.02);
    }

    .highlight-col {
      background: rgba(255, 42, 133, 0.04);
      font-weight: 700;
      color: var(--primary-color);
    }

    /* 流程与时间线 */
    .process-steps {
      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-lg);
      padding: 24px;
      position: relative;
    }

    .step-number {
      font-size: 28px;
      font-weight: 900;
      color: rgba(255, 42, 133, 0.3);
      line-height: 1;
      margin-bottom: 12px;
    }

    /* 表单区域 */
    .form-wrapper {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 40px;
      box-shadow: var(--shadow-md);
    }

    .form-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 20px;
      margin-bottom: 20px;
    }

    .form-group {
      display: flex;
      flex-direction: column;
      gap: 8px;
    }

    .form-group.full {
      grid-column: span 2;
    }

    .form-label {
      font-size: 14px;
      font-weight: 700;
      color: var(--text-main);
    }

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

    .form-control:focus {
      border-color: var(--primary-color);
      background: #ffffff;
      box-shadow: 0 0 0 3px rgba(255, 42, 133, 0.15);
    }

    textarea.form-control {
      min-height: 110px;
      resize: vertical;
    }

    /* 折叠面板 FAQ */
    .faq-accordion {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

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

    .faq-header {
      padding: 18px 24px;
      font-size: 16px;
      font-weight: 700;
      color: var(--text-main);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
    }

    .faq-header:hover {
      color: var(--primary-color);
    }

    .faq-icon {
      font-size: 18px;
      transition: transform 0.3s ease;
      color: var(--text-light);
    }

    .faq-body {
      padding: 0 24px;
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease, padding 0.35s ease;
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    .faq-item.active {
      border-color: rgba(255, 42, 133, 0.3);
      box-shadow: var(--shadow-sm);
    }

    .faq-item.active .faq-header {
      color: var(--primary-color);
    }

    .faq-item.active .faq-icon {
      transform: rotate(180deg);
      color: var(--primary-color);
    }

    .faq-item.active .faq-body {
      padding: 0 24px 20px;
      max-height: 300px;
    }

    /* 用户评论 */
    .testimonial-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .testimonial-author {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-top: 18px;
    }

    .author-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--primary-gradient);
      display: flex;
      align-items: center;
      justify-content: center;
      color: #ffffff;
      font-weight: 800;
      font-size: 16px;
    }

    .author-info h4 {
      font-size: 15px;
      font-weight: 700;
      color: var(--text-main);
    }

    .author-info p {
      font-size: 12px;
      color: var(--text-light);
    }

    /* 联系与客服展示 */
    .contact-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 30px;
      align-items: start;
    }

    .qr-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 28px;
      text-align: center;
      display: flex;
      flex-direction: column;
      align-items: center;
    }

    .qr-image-container {
      width: 180px;
      height: 180px;
      padding: 8px;
      background: #ffffff;
      border: 1px dashed var(--primary-color);
      border-radius: var(--radius-md);
      margin: 16px 0;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .qr-image-container img {
      width: 100%;
      height: 100%;
      object-fit: contain;
    }

    .contact-info-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 12px;
      width: 100%;
      text-align: left;
      font-size: 14px;
    }

    .contact-info-list li {
      display: flex;
      justify-content: space-between;
      border-bottom: 1px dashed var(--border-color);
      padding-bottom: 8px;
    }

    /* 文章与外链 */
    .articles-list {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .article-item {
      display: flex;
      justify-content: space-between;
      align-items: center;
      background: #ffffff;
      padding: 16px 20px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      text-decoration: none;
      color: var(--text-main);
      transition: var(--transition);
    }

    .article-item:hover {
      border-color: var(--primary-color);
      color: var(--primary-color);
      transform: translateX(4px);
    }

    /* 友情链接与页脚 */
    .site-footer {
      background: #0f172a;
      color: #94a3b8;
      padding: 60px 0 30px;
      border-top: 1px solid #1e293b;
    }

    .footer-links-bar {
      border-bottom: 1px solid #334155;
      padding-bottom: 24px;
      margin-bottom: 30px;
    }

    .footer-links-title {
      color: #f8fafc;
      font-size: 15px;
      font-weight: 700;
      margin-bottom: 14px;
    }

    .footer-links-list {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
    }

    .footer-links-list a {
      color: #94a3b8;
      text-decoration: none;
      font-size: 14px;
      transition: var(--transition);
    }

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

    .footer-bottom {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 13px;
    }

    /* 悬浮客服小部件 */
    .float-service {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: #ffffff;
      box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      color: var(--primary-color);
      border: 1px solid var(--border-color);
      transition: var(--transition);
      text-decoration: none;
    }

    .float-btn:hover {
      transform: scale(1.1);
      background: var(--primary-color);
      color: #ffffff;
    }

    /* 响应式适配 */
    @media (max-width: 992px) {
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        padding: 20px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
      }
      .nav-links.show {
        display: flex;
      }
      .mobile-toggle {
        display: block;
      }
      .grid-4, .grid-3 {
        grid-template-columns: repeat(2, 1fr);
      }
      .hero-stats-panel {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
      }
      .process-steps {
        grid-template-columns: repeat(2, 1fr);
      }
      .contact-grid, .grid-2 {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 640px) {
      .hero-title {
        font-size: 28px;
      }
      .grid-4, .grid-3, .process-steps, .hero-stats-panel {
        grid-template-columns: 1fr;
      }
      .stat-item {
        border-right: none;
        border-bottom: 1px solid var(--border-color);
        padding-bottom: 12px;
      }
      .stat-item:last-child {
        border-bottom: none;
      }
      .form-grid {
        grid-template-columns: 1fr;
      }
      .form-group.full {
        grid-column: span 1;
      }
    }