:root {
      --primary: #ff4d6d;
      --primary-light: #ff758f;
      --secondary: #5925dc;
      --accent-cyan: #00b4d8;
      --accent-orange: #ff9f1c;
      --accent-green: #2ec4b6;
      --bg-candy: #fff9fa;
      --bg-white: #ffffff;
      --bg-soft: #f8f9fe;
      --text-main: #1f2438;
      --text-muted: #5e657b;
      --text-light: #8e95a9;
      --border-color: #f0e6ed;
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 24px;
      --shadow-sm: 0 4px 12px rgba(255, 77, 109, 0.08);
      --shadow-md: 0 10px 30px rgba(89, 37, 220, 0.08);
      --shadow-lg: 0 18px 40px rgba(0, 0, 0, 0.06);
      --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
    }

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

    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }

    body {
      font-family: var(--font-stack);
      background-color: var(--bg-candy);
      color: var(--text-main);
      line-height: 1.6;
      overflow-x: hidden;
    }

    a {
      text-decoration: none;
      color: inherit;
      transition: all 0.25s ease;
    }

    img {
      max-width: 100%;
      height: auto;
      vertical-align: middle;
      display: inline-block;
    }

    .container {
      width: 100%;
      max-width: 1240px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }

    /* 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-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .brand-wrap {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .brand-wrap .ai-page-logo {
      height: 40px;
      width: auto;
    }
    .brand-text {
      font-size: 1.25rem;
      font-weight: 800;
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      list-style: none;
    }
    .nav-links li a {
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-main);
      padding: 8px 14px;
      border-radius: 20px;
      transition: all 0.2s;
    }
    .nav-links li a:hover,
    .nav-links li a.active {
      color: var(--primary);
      background-color: #fff0f3;
    }
    .nav-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .btn-main {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      border-radius: 30px;
      font-weight: 600;
      font-size: 0.95rem;
      background: linear-gradient(135deg, #ff4d6d 0%, #ff758f 50%, #ff9f1c 100%);
      color: #ffffff !important;
      box-shadow: 0 4px 15px rgba(255, 77, 109, 0.3);
      border: none;
      cursor: pointer;
      transition: transform 0.2s, box-shadow 0.2s;
    }
    .btn-main:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(255, 77, 109, 0.4);
    }
    .btn-secondary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      border-radius: 30px;
      font-weight: 600;
      font-size: 0.95rem;
      background: #ffffff;
      color: var(--secondary);
      border: 1.5px solid #e0d7f8;
      cursor: pointer;
      transition: all 0.2s;
    }
    .btn-secondary:hover {
      background: #f4efff;
      border-color: var(--secondary);
    }
    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      font-size: 1.6rem;
      color: var(--text-main);
      cursor: pointer;
    }

    /* 模块通用样式 */
    .section {
      padding: 70px 0;
      position: relative;
    }
    .section-alt {
      background-color: var(--bg-soft);
    }
    .section-header {
      text-align: center;
      max-width: 800px;
      margin: 0 auto 50px;
    }
    .section-tag {
      display: inline-block;
      padding: 6px 16px;
      border-radius: 20px;
      font-size: 0.85rem;
      font-weight: 700;
      text-transform: uppercase;
      margin-bottom: 12px;
      background: #ffe5ec;
      color: var(--primary);
    }
    .section-title {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 16px;
      line-height: 1.3;
    }
    .section-desc {
      font-size: 1.05rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 首屏 Hero */
    .hero-section {
      padding: 70px 0 60px;
      background: radial-gradient(circle at 10% 20%, #fff0f3 0%, #f7f0ff 40%, #ffffff 80%);
      text-align: center;
      border-bottom: 1px solid var(--border-color);
    }
    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 8px 20px;
      background: #ffffff;
      border-radius: 30px;
      border: 1px solid #ffd3dd;
      box-shadow: var(--shadow-sm);
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--primary);
      margin-bottom: 24px;
    }
    .hero-title {
      font-size: 2.6rem;
      font-weight: 900;
      color: var(--text-main);
      margin-bottom: 20px;
      line-height: 1.25;
      letter-spacing: -0.5px;
    }
    .hero-title span {
      background: linear-gradient(135deg, #ff4d6d 0%, #8338ec 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-desc {
      font-size: 1.15rem;
      color: var(--text-muted);
      max-width: 820px;
      margin: 0 auto 36px;
    }
    .hero-cta-group {
      display: flex;
      justify-content: center;
      gap: 16px;
      margin-bottom: 40px;
      flex-wrap: wrap;
    }
    .hero-cta-official {
      padding: 14px 34px;
      font-size: 1.1rem;
      font-weight: 700;
      background: linear-gradient(135deg, #ff4d6d, #7209b7);
      color: #ffffff !important;
      border-radius: 40px;
      box-shadow: 0 8px 25px rgba(255, 77, 109, 0.4);
      display: inline-flex;
      align-items: center;
      gap: 10px;
      transition: all 0.3s;
    }
    .hero-cta-official:hover {
      transform: translateY(-3px) scale(1.02);
      box-shadow: 0 12px 30px rgba(114, 9, 183, 0.45);
    }
    .hero-stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 18px;
      max-width: 1000px;
      margin: 0 auto;
    }
    .hero-stat-card {
      background: #ffffff;
      padding: 24px 16px;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-sm);
      border: 1px solid #ffeef2;
      text-align: center;
      transition: transform 0.25s ease;
    }
    .hero-stat-card:hover {
      transform: translateY(-4px);
    }
    .hero-stat-card h3 {
      font-size: 1.8rem;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 4px;
    }
    .hero-stat-card p {
      font-size: 0.9rem;
      color: var(--text-muted);
    }

    /* 平台支持模型标签流 */
    .model-strip {
      padding: 30px 0;
      background: #ffffff;
      border-bottom: 1px solid var(--border-color);
    }
    .model-strip-title {
      text-align: center;
      font-size: 0.95rem;
      color: var(--text-light);
      margin-bottom: 16px;
      font-weight: 600;
    }
    .tag-cloud {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 10px;
    }
    .model-tag {
      padding: 6px 14px;
      border-radius: 20px;
      font-size: 0.85rem;
      font-weight: 600;
      background: #faf7fd;
      color: #63528f;
      border: 1px solid #ebdefe;
      transition: all 0.2s;
    }
    .model-tag:hover {
      background: var(--secondary);
      color: #ffffff;
      transform: scale(1.05);
    }

    /* 网格卡片组件 */
    .cards-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 24px;
    }
    .candy-card {
      background: #ffffff;
      border-radius: var(--radius-md);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--border-color);
      transition: all 0.3s cubic-bezier(0.165, 0.84, 0.44, 1);
      display: flex;
      flex-direction: column;
    }
    .candy-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-md);
      border-color: #ffd0dc;
    }
    .card-icon {
      width: 52px;
      height: 52px;
      border-radius: 14px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.6rem;
      margin-bottom: 18px;
      background: #fff0f3;
      color: var(--primary);
    }
    .candy-card:nth-child(2n) .card-icon {
      background: #f1edff;
      color: var(--secondary);
    }
    .candy-card:nth-child(3n) .card-icon {
      background: #e6f9f7;
      color: var(--accent-green);
    }
    .candy-card:nth-child(4n) .card-icon {
      background: #fff5e6;
      color: var(--accent-orange);
    }
    .candy-card h3 {
      font-size: 1.25rem;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--text-main);
    }
    .candy-card p {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.6;
      flex-grow: 1;
    }

    /* 流程组件 */
    .flow-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .flow-item {
      background: #ffffff;
      border-radius: var(--radius-md);
      padding: 24px;
      border: 1px solid var(--border-color);
      position: relative;
    }
    .flow-step {
      font-size: 0.85rem;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 8px;
    }
    .flow-item h4 {
      font-size: 1.15rem;
      margin-bottom: 8px;
    }
    .flow-item p {
      font-size: 0.9rem;
      color: var(--text-muted);
    }

    /* 评测对比表格 */
    .rating-banner {
      background: linear-gradient(135deg, #ffffff 0%, #fff2f5 100%);
      border: 2px solid #ffccd7;
      border-radius: var(--radius-lg);
      padding: 30px;
      margin-bottom: 30px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 20px;
    }
    .score-badge {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .score-num {
      font-size: 3rem;
      font-weight: 900;
      color: var(--primary);
      line-height: 1;
    }
    .score-stars {
      color: #ffb703;
      font-size: 1.4rem;
    }
    .table-container {
      background: #ffffff;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      overflow-x: auto;
      box-shadow: var(--shadow-sm);
    }
    .custom-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 0.95rem;
    }
    .custom-table th, .custom-table td {
      padding: 16px 20px;
      border-bottom: 1px solid #f2ecf0;
    }
    .custom-table th {
      background-color: #faf7fa;
      font-weight: 700;
      color: var(--text-main);
    }
    .custom-table tr:hover td {
      background-color: #fff9fb;
    }
    .status-badge-high {
      display: inline-block;
      padding: 4px 10px;
      border-radius: 12px;
      background: #e6f9f7;
      color: #0c8a7b;
      font-weight: 700;
      font-size: 0.85rem;
    }
    .status-badge-low {
      display: inline-block;
      padding: 4px 10px;
      border-radius: 12px;
      background: #f1f3f7;
      color: #8c93a4;
      font-size: 0.85rem;
    }

    /* 案例展示 */
    .case-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }
    .case-card {
      background: #ffffff;
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }
    .case-img-wrap {
      overflow: hidden;
      background: #f8f8fa;
    }
    .case-img-wrap img {
      width: 100%;
      display: block;
      transition: transform 0.3s;
    }
    .case-card:hover .case-img-wrap img {
      transform: scale(1.03);
    }
    .case-info {
      padding: 24px;
    }
    .case-info h4 {
      font-size: 1.2rem;
      margin-bottom: 8px;
    }
    .case-info p {
      font-size: 0.92rem;
      color: var(--text-muted);
    }

    /* 用户评论 */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .review-card {
      background: #ffffff;
      border-radius: var(--radius-md);
      padding: 26px;
      border: 1px solid var(--border-color);
      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: 1.6;
      margin-bottom: 18px;
    }
    .reviewer-meta {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px dashed #f0e6ed;
      padding-top: 14px;
    }
    .reviewer-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      display: flex;
      align-items: center;
      justify-content: center;
      color: #ffffff;
      font-weight: 700;
    }
    .reviewer-info h5 {
      font-size: 0.95rem;
      color: var(--text-main);
    }
    .reviewer-info span {
      font-size: 0.8rem;
      color: var(--text-light);
    }

    /* FAQ折叠 */
    .faq-list {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }
    .faq-item {
      background: #ffffff;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }
    .faq-question {
      padding: 20px 24px;
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--text-main);
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      user-select: none;
    }
    .faq-question:hover {
      color: var(--primary);
    }
    .faq-toggle-icon {
      font-size: 1.2rem;
      transition: transform 0.3s;
    }
    .faq-answer {
      padding: 0 24px 20px;
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.7;
      display: none;
    }
    .faq-item.active .faq-answer {
      display: block;
    }
    .faq-item.active .faq-toggle-icon {
      transform: rotate(45deg);
      color: var(--primary);
    }

    /* 需求匹配与表单 */
    .form-wrapper {
      background: #ffffff;
      border-radius: var(--radius-lg);
      padding: 40px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
      max-width: 800px;
      margin: 0 auto;
    }
    .form-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 18px;
      margin-bottom: 20px;
    }
    .form-group {
      display: flex;
      flex-direction: column;
      gap: 6px;
    }
    .form-group.full {
      grid-column: span 2;
    }
    .form-label {
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--text-main);
    }
    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1.5px solid #e7dfeb;
      border-radius: var(--radius-sm);
      font-size: 0.95rem;
      font-family: inherit;
      outline: none;
      transition: border-color 0.2s;
    }
    .form-control:focus {
      border-color: var(--primary);
    }
    textarea.form-control {
      min-height: 110px;
      resize: vertical;
    }

    /* 文章与资讯 */
    .article-box {
      background: #ffffff;
      border-radius: var(--radius-md);
      padding: 30px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }
    .article-links {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 20px;
    }
    .article-item {
      padding: 10px 18px;
      background: #fbf9fc;
      border-radius: 8px;
      font-size: 0.9rem;
      color: var(--secondary);
      border: 1px solid #f0e6f5;
    }
    .article-item:hover {
      background: #f5effe;
    }

    /* 页脚与收尾 */
    .site-footer {
      background: #ffffff;
      border-top: 1px solid var(--border-color);
      padding: 50px 0 24px;
    }
    .footer-main-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 30px;
      margin-bottom: 40px;
    }
    .footer-col h4 {
      font-size: 1.05rem;
      font-weight: 700;
      margin-bottom: 16px;
      color: var(--text-main);
    }
    .footer-col p {
      font-size: 0.9rem;
      color: var(--text-muted);
      margin-bottom: 8px;
    }
    .footer-links-list {
      list-style: none;
    }
    .footer-links-list li {
      margin-bottom: 8px;
    }
    .footer-links-list a {
      font-size: 0.9rem;
      color: var(--text-muted);
    }
    .footer-links-list a:hover {
      color: var(--primary);
    }
    .qrcode-box {
      display: inline-block;
      padding: 8px;
      background: #ffffff;
      border: 1px solid #ebdfee;
      border-radius: 8px;
    }
    .qrcode-box img {
      width: 100px;
      height: 100px;
    }
    .friend-links-box {
      border-top: 1px solid var(--border-color);
      padding-top: 20px;
      margin-bottom: 24px;
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 14px;
      font-size: 0.85rem;
      color: var(--text-light);
    }
    .friend-links-box a {
      color: var(--text-muted);
    }
    .friend-links-box a:hover {
      color: var(--primary);
    }
    .footer-bottom {
      border-top: 1px solid #f6eff4;
      padding-top: 20px;
      text-align: center;
      font-size: 0.85rem;
      color: var(--text-light);
    }

    /* 浮动客服 */
    .float-panel {
      position: fixed;
      right: 20px;
      bottom: 40px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .float-btn {
      width: 50px;
      height: 50px;
      border-radius: 50%;
      background: #ffffff;
      color: var(--primary);
      border: 1.5px solid #ffd0dc;
      box-shadow: 0 4px 15px rgba(0,0,0,0.1);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.2rem;
      cursor: pointer;
      position: relative;
      transition: all 0.2s;
    }
    .float-btn:hover {
      background: var(--primary);
      color: #ffffff;
      transform: scale(1.08);
    }
    .float-qr {
      position: absolute;
      right: 60px;
      bottom: 0;
      background: #ffffff;
      padding: 12px;
      border-radius: 12px;
      box-shadow: var(--shadow-lg);
      border: 1px solid var(--border-color);
      display: none;
      text-align: center;
      width: 140px;
    }
    .float-qr img {
      width: 116px;
      height: 116px;
    }
    .float-btn:hover .float-qr {
      display: block;
    }

    /* 响应式适配 */
    @media (max-width: 992px) {
      .hero-title {
        font-size: 2.1rem;
      }
      .hero-stats-grid,
      .flow-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .reviews-grid {
        grid-template-columns: 1fr;
      }
      .footer-main-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .nav-links {
        display: none;
      }
      .mobile-menu-btn {
        display: block;
      }
    }
    @media (max-width: 768px) {
      .section {
        padding: 50px 0;
      }
      .section-title {
        font-size: 1.8rem;
      }
      .case-grid,
      .form-grid {
        grid-template-columns: 1fr;
      }
      .form-group.full {
        grid-column: span 1;
      }
      .hero-stats-grid,
      .flow-grid {
        grid-template-columns: 1fr;
      }
      .rating-banner {
        flex-direction: column;
        align-items: flex-start;
      }
      .footer-main-grid {
        grid-template-columns: 1fr;
      }
    }