:root {
      --primary: #7928ca;
      --primary-light: #9d4edd;
      --primary-dark: #5a189a;
      --secondary: #d946ef;
      --accent: #00f2fe;
      --bg-main: #faf7ff;
      --bg-card: #ffffff;
      --text-main: #1e1b2e;
      --text-muted: #5e5873;
      --border-color: #ede7f6;
      --shadow-sm: 0 4px 12px rgba(121, 40, 202, 0.06);
      --shadow-md: 0 10px 25px rgba(121, 40, 202, 0.1);
      --shadow-lg: 0 20px 40px rgba(121, 40, 202, 0.15);
      --radius: 12px;
      --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

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

    body {
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
      background-color: var(--bg-main);
      color: var(--text-main);
      line-height: 1.65;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

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

    ul, ol {
      list-style: none;
    }

    img {
      max-width: 100%;
      height: auto;
      display: block;
    }

    .container {
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 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 var(--border-color);
      box-shadow: var(--shadow-sm);
    }

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

    .brand-box {
      display: flex;
      align-items: center;
      gap: 12px;
      height: 48px;
    }

    .brand-box .ai-page-logo {
      max-height: 44px;
      width: auto;
      object-fit: contain;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
    }

    .nav-links a {
      padding: 8px 14px;
      font-size: 15px;
      font-weight: 500;
      color: var(--text-muted);
      border-radius: 6px;
    }

    .nav-links a:hover,
    .nav-links a.active {
      color: var(--primary);
      background-color: rgba(121, 40, 202, 0.06);
    }

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      font-size: 15px;
      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) 0%, var(--secondary) 100%);
      color: #ffffff;
      box-shadow: 0 4px 14px rgba(121, 40, 202, 0.3);
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(121, 40, 202, 0.4);
      color: #ffffff;
    }

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

    .btn-outline:hover {
      background-color: rgba(121, 40, 202, 0.05);
      transform: translateY(-2px);
    }

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

    /* 模块通用样式 */
    .section-wrap {
      padding: 80px 0;
      position: relative;
    }

    .section-title-wrap {
      text-align: center;
      max-width: 780px;
      margin: 0 auto 50px auto;
    }

    .section-tag {
      display: inline-block;
      font-size: 13px;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 1px;
      color: var(--primary);
      background: rgba(121, 40, 202, 0.08);
      padding: 6px 14px;
      border-radius: 30px;
      margin-bottom: 14px;
    }

    .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);
    }

    /* 首屏纯CSS与几何卡片风格（无图片） */
    .hero-section {
      padding: 90px 0 80px 0;
      background: radial-gradient(circle at 80% 20%, rgba(217, 70, 239, 0.12) 0%, rgba(121, 40, 202, 0.04) 60%, transparent 100%),
                  radial-gradient(circle at 10% 80%, rgba(0, 242, 254, 0.08) 0%, transparent 50%);
      position: relative;
      border-bottom: 1px solid var(--border-color);
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 48px;
      align-items: center;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 16px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 50px;
      font-size: 13px;
      font-weight: 600;
      color: var(--primary);
      box-shadow: var(--shadow-sm);
      margin-bottom: 24px;
    }

    .hero-badge-dot {
      width: 8px;
      height: 8px;
      background-color: var(--secondary);
      border-radius: 50%;
      box-shadow: 0 0 8px var(--secondary);
    }

    .hero-title {
      font-size: 40px;
      font-weight: 900;
      line-height: 1.25;
      color: var(--text-main);
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

    .hero-title-gradient {
      background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-intro {
      font-size: 17px;
      color: var(--text-muted);
      margin-bottom: 32px;
      line-height: 1.8;
    }

    .hero-cta-group {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 36px;
    }

    .hero-stats {
      display: flex;
      gap: 32px;
      padding-top: 24px;
      border-top: 1px solid var(--border-color);
    }

    .hero-stat-item h4 {
      font-size: 26px;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 4px;
    }

    .hero-stat-item p {
      font-size: 13px;
      color: var(--text-muted);
      font-weight: 500;
    }

    .hero-visual-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 20px;
      padding: 30px;
      box-shadow: var(--shadow-lg);
      position: relative;
    }

    .card-terminal-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 24px;
      padding-bottom: 16px;
      border-bottom: 1px solid var(--border-color);
    }

    .terminal-dots {
      display: flex;
      gap: 8px;
    }

    .terminal-dot {
      width: 10px;
      height: 10px;
      border-radius: 50%;
    }

    .dot-red { background-color: #ff5f56; }
    .dot-yellow { background-color: #ffbd2e; }
    .dot-green { background-color: #27c93f; }

    .terminal-title {
      font-size: 13px;
      font-weight: 600;
      color: var(--text-muted);
    }

    .model-flow-stack {
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .model-flow-node {
      background: var(--bg-main);
      padding: 14px 18px;
      border-radius: 12px;
      border: 1px solid rgba(121, 40, 202, 0.12);
      display: flex;
      align-items: center;
      justify-content: space-between;
    }

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

    .node-tag {
      font-size: 12px;
      padding: 3px 10px;
      background: rgba(121, 40, 202, 0.1);
      color: var(--primary);
      border-radius: 20px;
      font-weight: 600;
    }

    .node-desc {
      font-size: 12px;
      color: var(--text-muted);
      margin-top: 4px;
    }

    /* 关于我们与平台介绍 */
    .about-box {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 16px;
      padding: 40px;
      box-shadow: var(--shadow-sm);
    }

    .about-content-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 36px;
      align-items: center;
    }

    .about-p {
      font-size: 16px;
      color: var(--text-muted);
      margin-bottom: 18px;
      line-height: 1.8;
    }

    .feature-check-list {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 14px;
      margin-top: 24px;
    }

    .feature-check-item {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 14px;
      font-weight: 600;
      color: var(--text-main);
    }

    .check-icon {
      width: 18px;
      height: 18px;
      color: var(--primary);
      flex-shrink: 0;
    }

    /* 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;
    }

    .service-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .service-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-md);
      border-color: rgba(121, 40, 202, 0.3);
    }

    .service-card-icon {
      width: 48px;
      height: 48px;
      background: linear-gradient(135deg, rgba(121, 40, 202, 0.1) 0%, rgba(217, 70, 239, 0.1) 100%);
      color: var(--primary);
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 20px;
    }

    .service-card h3 {
      font-size: 18px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
    }

    .service-card p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 流程步骤 */
    .step-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 30px 24px;
      text-align: center;
      position: relative;
      box-shadow: var(--shadow-sm);
    }

    .step-num {
      width: 42px;
      height: 42px;
      margin: 0 auto 16px auto;
      background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
      color: #ffffff;
      font-size: 18px;
      font-weight: 800;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 4px 10px rgba(121, 40, 202, 0.25);
    }

    .step-card h3 {
      font-size: 17px;
      font-weight: 700;
      margin-bottom: 8px;
    }

    .step-card p {
      font-size: 13px;
      color: var(--text-muted);
    }

    /* 案例展示 */
    .case-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }

    .case-card:hover {
      box-shadow: var(--shadow-md);
      transform: translateY(-4px);
    }

    .case-img-wrap {
      width: 100%;
      height: 220px;
      background-color: #f1f0f5;
      overflow: hidden;
    }

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

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

    .case-body {
      padding: 24px;
    }

    .case-category {
      font-size: 12px;
      font-weight: 700;
      color: var(--primary);
      text-transform: uppercase;
      margin-bottom: 8px;
    }

    .case-body h3 {
      font-size: 17px;
      font-weight: 700;
      margin-bottom: 8px;
    }

    .case-body p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 对比评测表格与卡片 */
    .rating-header-card {
      background: linear-gradient(135deg, rgba(121, 40, 202, 0.08) 0%, rgba(217, 70, 239, 0.05) 100%);
      border: 1px solid rgba(121, 40, 202, 0.2);
      border-radius: 16px;
      padding: 30px;
      text-align: center;
      margin-bottom: 36px;
      box-shadow: var(--shadow-sm);
    }

    .rating-stars {
      color: #ffb800;
      font-size: 24px;
      margin-bottom: 8px;
      letter-spacing: 4px;
    }

    .rating-score {
      font-size: 44px;
      font-weight: 900;
      color: var(--primary);
      line-height: 1;
      margin-bottom: 6px;
    }

    .rating-score span {
      font-size: 20px;
      color: var(--text-muted);
      font-weight: 600;
    }

    .rating-desc {
      font-size: 15px;
      color: var(--text-main);
      font-weight: 600;
    }

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

    .comparison-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 14px;
    }

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

    .comparison-table th {
      background: #fcfaff;
      font-weight: 700;
      color: var(--text-main);
      white-space: nowrap;
    }

    .comparison-table th.highlight-col,
    .comparison-table td.highlight-col {
      background: rgba(121, 40, 202, 0.04);
      font-weight: 700;
      color: var(--primary);
    }

    .badge-highlight {
      display: inline-block;
      padding: 2px 8px;
      font-size: 12px;
      background: var(--primary);
      color: #ffffff;
      border-radius: 4px;
      margin-left: 6px;
      vertical-align: middle;
    }

    /* 标签云与支持大模型 */
    .model-tags-box {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      justify-content: center;
      background: #ffffff;
      padding: 36px;
      border-radius: 16px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

    .model-tag {
      padding: 8px 18px;
      background: var(--bg-main);
      border: 1px solid rgba(121, 40, 202, 0.15);
      border-radius: 30px;
      font-size: 14px;
      font-weight: 600;
      color: var(--text-main);
      transition: var(--transition);
    }

    .model-tag:hover {
      background: var(--primary);
      color: #ffffff;
      transform: translateY(-2px);
      box-shadow: 0 4px 10px rgba(121, 40, 202, 0.2);
    }

    /* 用户评论 */
    .testimonial-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .testimonial-text {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.8;
      margin-bottom: 20px;
      position: relative;
    }

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

    .user-avatar-initial {
      width: 44px;
      height: 44px;
      background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
      color: #ffffff;
      font-weight: 700;
      font-size: 16px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
    }

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

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

    /* FAQ 折叠面板 */
    .faq-grid {
      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: 10px;
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }

    .faq-item.active {
      border-color: rgba(121, 40, 202, 0.4);
    }

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

    .faq-icon {
      font-size: 20px;
      color: var(--primary);
      transition: transform 0.3s ease;
      font-weight: 400;
    }

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

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
      background: #fdfcff;
    }

    .faq-answer-inner {
      padding: 0 24px 20px 24px;
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.8;
      border-top: 1px dashed var(--border-color);
      padding-top: 14px;
    }

    /* 表单与联系模块 */
    .contact-wrapper {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 36px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 16px;
      padding: 40px;
      box-shadow: var(--shadow-sm);
    }

    .contact-info-col h3 {
      font-size: 22px;
      font-weight: 800;
      margin-bottom: 16px;
    }

    .contact-details {
      display: flex;
      flex-direction: column;
      gap: 16px;
      margin-top: 24px;
    }

    .contact-item {
      display: flex;
      align-items: center;
      gap: 14px;
      font-size: 14px;
      color: var(--text-main);
    }

    .contact-item strong {
      color: var(--primary);
      min-width: 80px;
    }

    .qr-box {
      margin-top: 24px;
      padding: 16px;
      background: var(--bg-main);
      border-radius: 10px;
      display: inline-block;
      border: 1px solid var(--border-color);
    }

    .qr-box img {
      width: 140px;
      height: 140px;
      object-fit: cover;
      border-radius: 6px;
      margin-bottom: 8px;
    }

    .qr-box p {
      font-size: 12px;
      text-align: center;
      color: var(--text-muted);
      font-weight: 600;
    }

    .contact-form {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .form-group {
      display: flex;
      flex-direction: column;
      gap: 6px;
    }

    .form-group label {
      font-size: 14px;
      font-weight: 600;
      color: var(--text-main);
    }

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

    .form-control:focus {
      border-color: var(--primary);
      background: #ffffff;
      box-shadow: 0 0 0 3px rgba(121, 40, 202, 0.1);
    }

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

    /* 资讯列表 */
    .news-list {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .news-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 10px;
      padding: 20px 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      transition: var(--transition);
    }

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

    .news-title {
      font-size: 15px;
      font-weight: 600;
      color: var(--text-main);
    }

    .news-link {
      color: var(--primary);
      font-size: 13px;
      font-weight: 600;
      flex-shrink: 0;
      margin-left: 16px;
    }

    /* 加盟代理与横幅 */
    .partner-banner {
      background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
      color: #ffffff;
      border-radius: 16px;
      padding: 50px 40px;
      text-align: center;
      box-shadow: var(--shadow-lg);
    }

    .partner-banner h2 {
      font-size: 32px;
      font-weight: 800;
      margin-bottom: 16px;
      color: #ffffff;
    }

    .partner-banner p {
      font-size: 16px;
      color: rgba(255, 255, 255, 0.9);
      max-width: 720px;
      margin: 0 auto 30px auto;
      line-height: 1.8;
    }

    .partner-banner .btn-primary {
      background: #ffffff;
      color: var(--primary);
      box-shadow: 0 4px 14px rgba(0, 0, 0, 0.2);
    }

    .partner-banner .btn-primary:hover {
      background: #f8f6fc;
      transform: translateY(-2px);
    }

    /* 友情链接与页脚 */
    .site-footer {
      background-color: #171520;
      color: #a09cb0;
      padding: 60px 0 30px 0;
      border-top: 1px solid #282436;
      font-size: 14px;
    }

    .footer-top {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 36px;
      padding-bottom: 40px;
      border-bottom: 1px solid #282436;
    }

    .footer-col h4 {
      color: #ffffff;
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 20px;
    }

    .footer-links-list li {
      margin-bottom: 10px;
    }

    .footer-links-list a {
      color: #a09cb0;
    }

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

    .friend-links-wrap {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 24px;
      padding-top: 24px;
      border-top: 1px solid #282436;
    }

    .friend-links-wrap a {
      color: #8c879d;
      font-size: 13px;
    }

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

    .footer-bottom {
      text-align: center;
      padding-top: 30px;
      font-size: 13px;
      color: #6a657c;
    }

    /* 悬浮小组件 */
    .float-panel {
      position: fixed;
      right: 20px;
      bottom: 40px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-btn {
      width: 46px;
      height: 46px;
      background: #ffffff;
      color: var(--primary);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
      cursor: pointer;
      border: 1px solid var(--border-color);
      transition: var(--transition);
      font-weight: bold;
    }

    .float-btn:hover {
      background: var(--primary);
      color: #ffffff;
      transform: translateY(-3px);
    }

    /* 响应式媒体查询 */
    @media (max-width: 1024px) {
      .hero-grid {
        grid-template-columns: 1fr;
        gap: 40px;
      }
      .grid-4 {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-top {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      .menu-toggle {
        display: block;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        align-items: stretch;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
        padding: 16px;
        gap: 0;
      }
      .nav-links.show {
        display: flex;
      }
      .nav-links a {
        padding: 12px 16px;
      }
      .hero-title {
        font-size: 30px;
      }
      .grid-3 {
        grid-template-columns: 1fr;
      }
      .grid-4 {
        grid-template-columns: 1fr;
      }
      .about-content-grid,
      .contact-wrapper {
        grid-template-columns: 1fr;
      }
      .feature-check-list {
        grid-template-columns: 1fr;
      }
      .footer-top {
        grid-template-columns: 1fr;
      }
    }