:root {
      --bg-main: #fbfbfe;
      --bg-card: #ffffff;
      --bg-alt: #f4f6fc;
      --text-main: #182033;
      --text-muted: #5e6d8a;
      --text-light: #8896b3;
      --candy-pink: #ff527b;
      --candy-blue: #3b82f6;
      --candy-purple: #8b5cf6;
      --candy-cyan: #06b6d4;
      --candy-orange: #ff7a18;
      --candy-green: #10b981;
      --candy-yellow: #f59e0b;
      --border-color: rgba(226, 232, 246, 0.85);
      --gradient-candy: linear-gradient(135deg, #ff527b 0%, #8b5cf6 50%, #3b82f6 100%);
      --gradient-subtle: linear-gradient(180deg, #f8faff 0%, #f1f4fd 100%);
      --shadow-sm: 0 4px 12px rgba(139, 92, 246, 0.05);
      --shadow-md: 0 10px 25px rgba(59, 130, 246, 0.08);
      --shadow-lg: 0 20px 40px rgba(255, 82, 123, 0.12);
      --radius-sm: 10px;
      --radius-md: 16px;
      --radius-lg: 24px;
      --radius-full: 9999px;
      --container-width: 1200px;
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
      -webkit-tap-highlight-color: transparent;
    }

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

    body {
      background: radial-gradient(circle at 10% 0%, rgba(255, 82, 123, 0.05) 0%, transparent 40%),
                  radial-gradient(circle at 90% 20%, rgba(59, 130, 246, 0.05) 0%, transparent 40%),
                  radial-gradient(circle at 50% 80%, rgba(139, 92, 246, 0.04) 0%, transparent 50%),
                  var(--bg-main);
      min-height: 100vh;
      overflow-x: hidden;
    }

    .container {
      width: 100%;
      max-width: var(--container-width);
      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);
      border-bottom: 1px solid var(--border-color);
      transition: all 0.3s ease;
    }

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

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

    .brand-logo-wrap {
      width: 130px;
      height: 40px;
      display: flex;
      align-items: center;
    }

    .ai-page-logo {
      max-height: 100%;
      object-fit: contain;
    }

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

    .nav-item {
      position: relative;
    }

    .nav-item a {
      display: inline-block;
      padding: 8px 14px;
      font-size: 14px;
      font-weight: 500;
      color: var(--text-main);
      text-decoration: none;
      transition: color 0.2s, transform 0.2s;
      border-radius: var(--radius-full);
    }

    .nav-item a:hover {
      color: var(--candy-pink);
      background: rgba(255, 82, 123, 0.08);
    }

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-weight: 600;
      font-size: 14px;
      padding: 10px 22px;
      border-radius: var(--radius-full);
      text-decoration: none;
      transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
      cursor: pointer;
      border: 1px solid transparent;
    }

    .btn-candy {
      background: var(--gradient-candy);
      color: #ffffff !important;
      box-shadow: 0 4px 15px rgba(255, 82, 123, 0.35);
    }

    .btn-candy:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 25px rgba(255, 82, 123, 0.45);
    }

    .btn-outline {
      background: #ffffff;
      color: var(--candy-purple);
      border-color: rgba(139, 92, 246, 0.3);
    }

    .btn-outline:hover {
      border-color: var(--candy-purple);
      background: rgba(139, 92, 246, 0.05);
      transform: translateY(-2px);
    }

    .mobile-menu-btn {
      display: none;
      flex-direction: column;
      gap: 5px;
      background: transparent;
      border: none;
      cursor: pointer;
      padding: 6px;
    }

    .mobile-menu-btn span {
      width: 22px;
      height: 2px;
      background: var(--text-main);
      border-radius: 2px;
      transition: 0.3s;
    }

    /* 区域通用样式 */
    .section-spacing {
      padding: 70px 0;
      position: relative;
    }

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

    .badge-tag {
      display: inline-block;
      font-size: 13px;
      font-weight: 700;
      padding: 6px 16px;
      border-radius: var(--radius-full);
      background: linear-gradient(90deg, rgba(255, 82, 123, 0.12), rgba(139, 92, 246, 0.12));
      color: var(--candy-purple);
      margin-bottom: 14px;
      border: 1px solid rgba(139, 92, 246, 0.2);
    }

    .section-title {
      font-size: 32px;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 16px;
      line-height: 1.3;
    }

    .section-desc {
      font-size: 16px;
      color: var(--text-muted);
    }

    /* 首屏 HERO 区域 - 严禁出现图片 */
    .hero-section {
      padding: 80px 0 60px;
      position: relative;
      text-align: center;
      background: linear-gradient(180deg, rgba(255, 255, 255, 0.8) 0%, rgba(244, 246, 252, 0.6) 100%);
      border-bottom: 1px solid var(--border-color);
    }

    .hero-h1 {
      font-size: 42px;
      font-weight: 900;
      color: var(--text-main);
      letter-spacing: -0.5px;
      line-height: 1.25;
      margin-bottom: 20px;
    }

    .hero-h1 span {
      background: var(--gradient-candy);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-lead {
      font-size: 18px;
      color: var(--text-muted);
      max-width: 820px;
      margin: 0 auto 36px;
      line-height: 1.7;
    }

    .hero-actions {
      display: flex;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 50px;
    }

    .btn-hero-primary {
      font-size: 16px;
      padding: 14px 34px;
      background: var(--gradient-candy);
      color: #ffffff;
      border-radius: var(--radius-full);
      box-shadow: 0 8px 30px rgba(255, 82, 123, 0.4);
    }

    .btn-hero-primary:hover {
      transform: translateY(-3px) scale(1.02);
      box-shadow: 0 12px 36px rgba(255, 82, 123, 0.5);
    }

    .btn-hero-secondary {
      font-size: 16px;
      padding: 14px 30px;
      background: #ffffff;
      color: var(--text-main);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-full);
      box-shadow: var(--shadow-sm);
    }

    .btn-hero-secondary:hover {
      border-color: var(--candy-blue);
      color: var(--candy-blue);
      transform: translateY(-3px);
    }

    /* 首屏无图纯CSS特性卡片 */
    .hero-stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: 20px;
    }

    .stat-card {
      background: #ffffff;
      padding: 24px 20px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      text-align: center;
      transition: all 0.3s ease;
    }

    .stat-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: rgba(139, 92, 246, 0.3);
    }

    .stat-number {
      font-size: 32px;
      font-weight: 800;
      color: var(--candy-pink);
      line-height: 1;
      margin-bottom: 8px;
    }

    .stat-label {
      font-size: 14px;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 4px;
    }

    .stat-desc {
      font-size: 12px;
      color: var(--text-muted);
    }

    /* 支持模型滚动胶囊池 */
    .model-pills-bar {
      margin-top: 40px;
      padding: 16px 20px;
      background: rgba(255, 255, 255, 0.7);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-full);
      display: flex;
      align-items: center;
      justify-content: center;
      flex-wrap: wrap;
      gap: 10px;
    }

    .model-pill-title {
      font-size: 13px;
      font-weight: 700;
      color: var(--text-muted);
      margin-right: 6px;
    }

    .model-pill {
      font-size: 12px;
      font-weight: 600;
      padding: 4px 12px;
      border-radius: var(--radius-full);
      background: #f1f4fd;
      color: #3b4d75;
      border: 1px solid rgba(139, 92, 246, 0.15);
      transition: 0.2s;
    }

    .model-pill:hover {
      background: var(--candy-purple);
      color: #ffffff;
      transform: scale(1.05);
    }

    /* 网格通用布局 */
    .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;
      align-items: center;
    }

    /* 卡片通用样式 */
    .candy-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 30px;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
      position: relative;
      overflow: hidden;
    }

    .candy-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-md);
      border-color: rgba(59, 130, 246, 0.3);
    }

    .candy-card::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 4px;
      background: var(--gradient-candy);
      opacity: 0;
      transition: opacity 0.3s;
    }

    .candy-card:hover::before {
      opacity: 1;
    }

    .card-icon-box {
      width: 52px;
      height: 52px;
      border-radius: 14px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 24px;
      font-weight: 700;
      margin-bottom: 20px;
      background: linear-gradient(135deg, rgba(255, 82, 123, 0.12), rgba(139, 92, 246, 0.12));
      color: var(--candy-purple);
    }

    .card-title {
      font-size: 20px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
    }

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

    /* 一站式场景展示 */
    .scene-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 22px;
      box-shadow: var(--shadow-sm);
      transition: all 0.25s ease;
    }

    .scene-card:hover {
      border-color: var(--candy-pink);
      transform: translateY(-3px);
      box-shadow: 0 8px 20px rgba(255, 82, 123, 0.1);
    }

    .scene-badge {
      display: inline-block;
      font-size: 11px;
      font-weight: 700;
      padding: 3px 10px;
      border-radius: var(--radius-full);
      background: rgba(255, 82, 123, 0.1);
      color: var(--candy-pink);
      margin-bottom: 10px;
    }

    .scene-title {
      font-size: 16px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
    }

    .scene-desc {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* 对比评测专属样式 */
    .review-score-banner {
      background: linear-gradient(135deg, #2a164d 0%, #171c3b 100%);
      color: #ffffff;
      border-radius: var(--radius-lg);
      padding: 40px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 24px;
      margin-bottom: 30px;
      box-shadow: 0 15px 35px rgba(23, 28, 59, 0.2);
    }

    .score-big {
      font-size: 64px;
      font-weight: 900;
      color: #ffc107;
      line-height: 1;
    }

    .score-info h3 {
      font-size: 24px;
      margin-bottom: 8px;
    }

    .score-stars {
      color: #ffc107;
      font-size: 20px;
      letter-spacing: 2px;
      margin-bottom: 6px;
    }

    .score-info p {
      font-size: 14px;
      color: #c7d2fe;
    }

    .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;
      font-size: 14px;
      min-width: 650px;
    }

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

    .custom-table th {
      background: #f8faff;
      font-weight: 700;
      color: var(--text-main);
    }

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

    .custom-table .highlight-col {
      background: rgba(255, 82, 123, 0.03);
      font-weight: 600;
      color: var(--candy-pink);
    }

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

    .flow-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 26px 20px;
      text-align: center;
      position: relative;
    }

    .flow-number {
      width: 40px;
      height: 40px;
      margin: 0 auto 16px;
      border-radius: 50%;
      background: var(--gradient-candy);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 16px;
    }

    /* 案例中心 & 媒体展示 */
    .media-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: 0.3s;
    }

    .media-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-md);
    }

    .media-img-wrap {
      width: 100%;
      height: 220px;
      overflow: hidden;
      background: #eef2f9;
      position: relative;
    }

    .media-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }

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

    .media-content {
      padding: 22px;
    }

    /* 用户评论 */
    .review-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 26px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .review-text {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 20px;
      font-style: italic;
    }

    .review-author {
      display: flex;
      align-items: center;
      gap: 14px;
    }

    .author-avatar-text {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--candy-blue), var(--candy-purple));
      color: #ffffff;
      font-weight: 700;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 16px;
    }

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

    .author-role {
      font-size: 12px;
      color: var(--candy-purple);
    }

    /* FAQ 折叠面板 */
    .faq-list {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: all 0.25s;
    }

    .faq-header {
      padding: 20px 24px;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: space-between;
      font-weight: 700;
      font-size: 16px;
      color: var(--text-main);
      user-select: none;
    }

    .faq-header:hover {
      color: var(--candy-purple);
      background: rgba(139, 92, 246, 0.02);
    }

    .faq-icon {
      font-size: 20px;
      transition: transform 0.3s ease;
      color: var(--candy-purple);
      font-weight: bold;
    }

    .faq-body {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s cubic-bezier(0, 1, 0, 1);
      padding: 0 24px;
      color: var(--text-muted);
      font-size: 14px;
      line-height: 1.7;
    }

    .faq-item.active {
      border-color: rgba(139, 92, 246, 0.3);
      box-shadow: 0 4px 15px rgba(139, 92, 246, 0.06);
    }

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

    .faq-item.active .faq-body {
      max-height: 400px;
      padding-bottom: 20px;
    }

    /* 表单与需求匹配 */
    .form-wrapper {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 36px;
      box-shadow: var(--shadow-md);
    }

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

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

    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 14px;
      background: #fbfcfe;
      color: var(--text-main);
      outline: none;
      transition: border-color 0.2s;
    }

    .form-control:focus {
      border-color: var(--candy-purple);
      background: #ffffff;
      box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.15);
    }

    /* 资讯与友情链接 */
    .article-tags-list {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 20px;
    }

    .article-tag-item {
      display: inline-block;
      padding: 10px 18px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-full);
      font-size: 13px;
      color: var(--text-main);
      text-decoration: none;
      transition: all 0.2s;
    }

    .article-tag-item:hover {
      border-color: var(--candy-blue);
      color: var(--candy-blue);
      background: rgba(59, 130, 246, 0.05);
      transform: translateY(-2px);
    }

    /* 联系与二维码 */
    .contact-card-box {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 30px;
      text-align: center;
      box-shadow: var(--shadow-sm);
    }

    .qr-container {
      width: 160px;
      height: 160px;
      margin: 16px auto;
      padding: 8px;
      border: 1px dashed var(--candy-purple);
      border-radius: var(--radius-md);
      background: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .qr-container img {
      max-width: 100%;
      height: auto;
      border-radius: 8px;
    }

    /* 页脚设计 */
    .site-footer {
      background: #111728;
      color: #94a3b8;
      padding: 60px 0 30px;
      font-size: 13px;
    }

    .footer-top-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 30px;
      margin-bottom: 40px;
    }

    .footer-title {
      font-size: 15px;
      font-weight: 700;
      color: #ffffff;
      margin-bottom: 18px;
    }

    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .footer-links a {
      color: #94a3b8;
      text-decoration: none;
      transition: color 0.2s;
    }

    .footer-links a:hover {
      color: #ffffff;
    }

    .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: 16px;
    }

    .footer-links-inline a {
      color: #94a3b8;
      text-decoration: none;
      margin-right: 16px;
    }

    .footer-links-inline a:hover {
      color: #ffffff;
    }

    /* 浮动客服挂件 */
    .floating-kefu {
      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: var(--gradient-candy);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 6px 20px rgba(255, 82, 123, 0.4);
      cursor: pointer;
      text-decoration: none;
      font-size: 13px;
      font-weight: bold;
      border: none;
      transition: transform 0.2s;
    }

    .float-btn:hover {
      transform: scale(1.1);
    }

    /* 响应式适配 */
    @media (max-width: 992px) {
      .hero-h1 { font-size: 32px; }
      .grid-4, .hero-stats-grid, .flow-steps { grid-template-columns: repeat(2, 1fr); }
      .grid-3 { grid-template-columns: repeat(2, 1fr); }
      .footer-top-grid { grid-template-columns: repeat(2, 1fr); }
      .mobile-menu-btn { display: flex; }
      .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.active { display: flex; }
      .nav-item a { width: 100%; padding: 12px 16px; }
    }

    @media (max-width: 640px) {
      .hero-h1 { font-size: 26px; }
      .section-title { font-size: 24px; }
      .grid-4, .grid-3, .grid-2, .hero-stats-grid, .flow-steps { grid-template-columns: 1fr; }
      .footer-top-grid { grid-template-columns: 1fr; }
      .score-big { font-size: 48px; }
      .review-score-banner { text-align: center; justify-content: center; }
    }