:root {
      --primary: #0052cc;
      --primary-dark: #0747a6;
      --primary-light: #e8f0fe;
      --accent: #00c7e6;
      --accent-warm: #ff8b00;
      --text-main: #172b4d;
      --text-muted: #5e6c84;
      --bg-page: #f4f7fb;
      --bg-card: #ffffff;
      --border-color: #dbe4f0;
      --shadow-sm: 0 2px 8px rgba(9, 30, 66, 0.06);
      --shadow-md: 0 8px 24px rgba(9, 30, 66, 0.1);
      --shadow-lg: 0 16px 40px rgba(9, 30, 66, 0.12);
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 18px;
      --container-width: 1200px;
    }
    *, *::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;
      overflow-x: hidden;
      -webkit-font-smoothing: antialiased;
    }
    a {
      color: var(--primary);
      text-decoration: none;
      transition: all 0.25s ease;
    }
    a:hover {
      color: var(--primary-dark);
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    .site-container {
      width: 100%;
      max-width: var(--container-width);
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }
    .section-wrap {
      padding: 70px 0;
      position: relative;
    }
    .section-wrap.alt-bg {
      background-color: #ffffff;
    }
    .section-head {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 45px auto;
    }
    .section-tag {
      display: inline-block;
      font-size: 0.85rem;
      font-weight: 700;
      color: var(--primary);
      background: var(--primary-light);
      padding: 4px 14px;
      border-radius: 50px;
      margin-bottom: 12px;
      letter-spacing: 0.5px;
    }
    .section-title {
      font-size: 2rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 12px;
      letter-spacing: -0.5px;
    }
    .section-desc {
      font-size: 1rem;
      color: var(--text-muted);
    }

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.96);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }
    .nav-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .brand-box {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .brand-box .ai-page-logo {
      height: 38px;
      width: auto;
    }
    .brand-title {
      font-size: 1.25rem;
      font-weight: 800;
      color: var(--primary-dark);
    }
    .nav-links {
      display: flex;
      align-items: center;
      list-style: none;
      gap: 0;
    }
    .nav-links li a {
      font-size: 0.95rem;
      color: var(--text-main);
      font-weight: 500;
      padding: 8px 14px;
      border-radius: var(--radius-sm);
      display: block;
    }
    .nav-links li a:hover {
      color: var(--primary);
      background: var(--primary-light);
    }
    .nav-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .btn-nav-portal {
      background: var(--primary);
      color: #ffffff !important;
      padding: 8px 18px;
      border-radius: var(--radius-sm);
      font-weight: 600;
      font-size: 0.9rem;
      box-shadow: 0 4px 12px rgba(0, 82, 204, 0.2);
    }
    .btn-nav-portal:hover {
      background: var(--primary-dark);
      transform: translateY(-1px);
    }
    .nav-toggle-btn {
      display: none;
      background: none;
      border: 1px solid var(--border-color);
      padding: 6px 10px;
      border-radius: 6px;
      font-size: 1.2rem;
      cursor: pointer;
      color: var(--text-main);
    }

    /* Hero 首屏 (无图片) */
    .hero-wrap {
      background: linear-gradient(135deg, #091e42 0%, #0052cc 60%, #008da6 100%);
      color: #ffffff;
      padding: 90px 0 80px 0;
      position: relative;
      overflow: hidden;
    }
    .hero-glow-1 {
      position: absolute;
      top: -20%;
      right: -10%;
      width: 500px;
      height: 500px;
      background: radial-gradient(circle, rgba(0, 199, 230, 0.35) 0%, rgba(0, 82, 204, 0) 70%);
      border-radius: 50%;
      pointer-events: none;
    }
    .hero-glow-2 {
      position: absolute;
      bottom: -30%;
      left: -10%;
      width: 600px;
      height: 600px;
      background: radial-gradient(circle, rgba(255, 139, 0, 0.2) 0%, rgba(9, 30, 66, 0) 70%);
      border-radius: 50%;
      pointer-events: none;
    }
    .hero-content {
      position: relative;
      z-index: 2;
      text-align: center;
      max-width: 880px;
      margin: 0 auto;
    }
    .hero-badge {
      display: inline-flex;
      align-items: center;
      background: rgba(255, 255, 255, 0.15);
      border: 1px solid rgba(255, 255, 255, 0.3);
      padding: 6px 16px;
      border-radius: 30px;
      font-size: 0.9rem;
      font-weight: 600;
      color: #ffffff;
      margin-bottom: 24px;
      backdrop-filter: blur(8px);
    }
    .hero-title {
      font-size: 2.8rem;
      font-weight: 900;
      line-height: 1.25;
      margin-bottom: 20px;
      letter-spacing: -1px;
      color: #ffffff;
    }
    .hero-lead {
      font-size: 1.15rem;
      line-height: 1.7;
      color: rgba(255, 255, 255, 0.9);
      margin-bottom: 36px;
      max-width: 760px;
      margin-left: auto;
      margin-right: auto;
    }
    .hero-actions {
      display: flex;
      justify-content: center;
      align-items: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 50px;
    }
    .btn-hero-primary {
      background: #ff8b00;
      color: #ffffff;
      font-size: 1.1rem;
      font-weight: 700;
      padding: 14px 34px;
      border-radius: var(--radius-sm);
      box-shadow: 0 8px 20px rgba(255, 139, 0, 0.4);
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }
    .btn-hero-primary:hover {
      background: #e07700;
      color: #ffffff;
      transform: translateY(-2px);
    }
    .btn-hero-secondary {
      background: rgba(255, 255, 255, 0.15);
      color: #ffffff;
      border: 1px solid rgba(255, 255, 255, 0.4);
      font-size: 1.05rem;
      font-weight: 600;
      padding: 13px 28px;
      border-radius: var(--radius-sm);
      backdrop-filter: blur(6px);
    }
    .btn-hero-secondary:hover {
      background: rgba(255, 255, 255, 0.25);
      color: #ffffff;
    }

    /* 纯CSS首屏指标与特色面板 (替代图片) */
    .hero-feature-deck {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      margin-top: 20px;
    }
    .deck-item {
      background: rgba(255, 255, 255, 0.1);
      border: 1px solid rgba(255, 255, 255, 0.2);
      border-radius: var(--radius-md);
      padding: 20px 16px;
      text-align: left;
      backdrop-filter: blur(10px);
    }
    .deck-num {
      font-size: 1.8rem;
      font-weight: 800;
      color: #00c7e6;
      line-height: 1;
      margin-bottom: 6px;
    }
    .deck-label {
      font-size: 0.95rem;
      font-weight: 600;
      color: #ffffff;
      margin-bottom: 4px;
    }
    .deck-sub {
      font-size: 0.8rem;
      color: rgba(255, 255, 255, 0.75);
    }

    /* 核心矩阵标签云 */
    .model-strip {
      background: #ffffff;
      border-bottom: 1px solid var(--border-color);
      padding: 18px 0;
    }
    .strip-inner {
      display: flex;
      align-items: center;
      gap: 12px;
      flex-wrap: wrap;
      justify-content: center;
    }
    .strip-label {
      font-size: 0.85rem;
      font-weight: 700;
      color: var(--primary-dark);
      margin-right: 6px;
    }
    .tag-chip {
      background: var(--bg-page);
      border: 1px solid var(--border-color);
      color: var(--text-main);
      padding: 4px 10px;
      border-radius: 4px;
      font-size: 0.8rem;
      font-weight: 500;
    }

    /* 平台介绍 */
    .platform-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 36px;
      align-items: center;
    }
    .platform-text h3 {
      font-size: 1.6rem;
      font-weight: 700;
      margin-bottom: 16px;
      color: var(--primary-dark);
    }
    .platform-text p {
      font-size: 0.95rem;
      color: var(--text-muted);
      margin-bottom: 20px;
      line-height: 1.7;
    }
    .feature-list {
      list-style: none;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 12px;
    }
    .feature-item {
      background: var(--primary-light);
      padding: 10px 14px;
      border-radius: var(--radius-sm);
      font-size: 0.88rem;
      font-weight: 600;
      color: var(--primary-dark);
      border-left: 3px solid var(--primary);
    }
    .platform-media-card {
      background: #ffffff;
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-md);
      border: 1px solid var(--border-color);
    }
    .platform-media-card img {
      width: 100%;
      height: auto;
    }
    .media-card-caption {
      padding: 16px 20px;
      font-size: 0.9rem;
      color: var(--text-main);
      font-weight: 600;
      background: #ffffff;
    }

    /* 服务能力卡片网格 (24场景精选) */
    .card-grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .card-grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .service-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px 20px;
      transition: all 0.3s ease;
      position: relative;
    }
    .service-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: var(--primary);
    }
    .service-badge {
      display: inline-block;
      font-size: 0.75rem;
      font-weight: 700;
      color: var(--primary);
      background: var(--primary-light);
      padding: 2px 8px;
      border-radius: 4px;
      margin-bottom: 12px;
    }
    .service-card h4 {
      font-size: 1.15rem;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--text-main);
    }
    .service-card p {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 对比评测板块 */
    .review-score-banner {
      background: linear-gradient(135deg, #0747a6, #0052cc);
      color: #ffffff;
      border-radius: var(--radius-md);
      padding: 24px 30px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 20px;
      margin-bottom: 30px;
    }
    .score-badge-main {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .big-score {
      font-size: 3rem;
      font-weight: 900;
      color: #00c7e6;
      line-height: 1;
    }
    .stars-box {
      font-size: 1.25rem;
      color: #ffab00;
      font-weight: 700;
    }
    .compare-table-wrap {
      background: #ffffff;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      overflow-x: auto;
      box-shadow: var(--shadow-sm);
    }
    .compare-table {
      width: 100%;
      border-collapse: collapse;
      min-width: 680px;
      text-align: left;
    }
    .compare-table th, .compare-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
      font-size: 0.92rem;
    }
    .compare-table th {
      background: var(--primary-light);
      color: var(--primary-dark);
      font-weight: 700;
    }
    .compare-table tr:last-child td {
      border-bottom: none;
    }
    .compare-table td.highlight {
      background: #f8fbff;
      color: var(--primary);
      font-weight: 700;
    }

    /* Token 比价卡片 */
    .token-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .token-card {
      background: #ffffff;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      padding: 24px;
      position: relative;
    }
    .token-card.featured {
      border: 2px solid var(--primary);
      box-shadow: var(--shadow-md);
    }
    .token-tag-top {
      position: absolute;
      top: -12px;
      right: 20px;
      background: var(--primary);
      color: #ffffff;
      font-size: 0.75rem;
      padding: 2px 10px;
      border-radius: 12px;
      font-weight: 700;
    }
    .token-price {
      font-size: 2rem;
      font-weight: 800;
      color: var(--primary-dark);
      margin: 12px 0 6px 0;
    }
    .token-price span {
      font-size: 0.85rem;
      color: var(--text-muted);
      font-weight: normal;
    }

    /* 标准流程时间线 */
    .process-steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }
    .step-box {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px 20px;
      position: relative;
    }
    .step-badge {
      width: 36px;
      height: 36px;
      background: var(--primary);
      color: #ffffff;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      margin-bottom: 14px;
    }
    .step-box h4 {
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 8px;
    }
    .step-box p {
      font-size: 0.85rem;
      color: var(--text-muted);
    }

    /* 案例中心展示 */
    .case-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 30px;
    }
    .case-card {
      background: #ffffff;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }
    .case-card-img-wrap {
      width: 100%;
      height: 240px;
      overflow: hidden;
      background: #e2e8f0;
    }
    .case-card-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    .case-card-body {
      padding: 20px;
    }
    .case-card-body h4 {
      font-size: 1.2rem;
      font-weight: 700;
      margin-bottom: 8px;
    }
    .case-card-body p {
      font-size: 0.9rem;
      color: var(--text-muted);
      margin-bottom: 12px;
    }

    /* 用户评论 */
    .review-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .review-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .review-text {
      font-size: 0.92rem;
      color: var(--text-main);
      margin-bottom: 20px;
      line-height: 1.6;
      font-style: normal;
    }
    .review-author {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid var(--border-color);
      padding-top: 14px;
    }
    .author-avatar-badge {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
    }
    .author-info h5 {
      font-size: 0.95rem;
      font-weight: 700;
    }
    .author-info span {
      font-size: 0.8rem;
      color: var(--text-muted);
    }

    /* FAQ 折叠 */
    .faq-container {
      max-width: 900px;
      margin: 0 auto;
    }
    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      margin-bottom: 12px;
      overflow: hidden;
    }
    .faq-question {
      padding: 18px 20px;
      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;
      background: #ffffff;
    }
    .faq-question:hover {
      background: #fafcff;
      color: var(--primary);
    }
    .faq-arrow {
      font-size: 0.9rem;
      transition: transform 0.3s ease;
      color: var(--text-muted);
    }
    .faq-answer {
      padding: 0 20px 18px 20px;
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.6;
      display: none;
    }
    .faq-item.active .faq-answer {
      display: block;
    }
    .faq-item.active .faq-arrow {
      transform: rotate(180deg);
    }

    /* 表单与需求匹配 */
    .form-section-box {
      background: #ffffff;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      padding: 40px;
      box-shadow: var(--shadow-md);
      max-width: 860px;
      margin: 0 auto;
    }
    .custom-form {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
    }
    .form-group.full-width {
      grid-column: span 2;
    }
    .form-group label {
      display: block;
      font-size: 0.9rem;
      font-weight: 600;
      margin-bottom: 6px;
      color: var(--text-main);
    }
    .form-group input, .form-group select, .form-group textarea {
      width: 100%;
      padding: 12px 14px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 0.92rem;
      outline: none;
      transition: border-color 0.2s ease;
      background: #ffffff;
      color: var(--text-main);
    }
    .form-group input:focus, .form-group select:focus, .form-group textarea:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px var(--primary-light);
    }
    .btn-submit {
      background: var(--primary);
      color: #ffffff;
      border: none;
      padding: 14px 28px;
      font-size: 1rem;
      font-weight: 700;
      border-radius: var(--radius-sm);
      cursor: pointer;
      width: 100%;
      transition: background 0.25s ease;
    }
    .btn-submit:hover {
      background: var(--primary-dark);
    }

    /* 行业资讯 & 最新文章 */
    .article-links-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }
    .article-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      padding: 18px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .article-card h5 {
      font-size: 1rem;
      font-weight: 700;
      margin-bottom: 8px;
      color: var(--text-main);
    }
    .article-card p {
      font-size: 0.85rem;
      color: var(--text-muted);
      margin-bottom: 12px;
    }

    /* 加盟代理板块 */
    .agent-box {
      background: linear-gradient(135deg, #091e42 0%, #0052cc 100%);
      color: #ffffff;
      border-radius: var(--radius-lg);
      padding: 40px;
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 30px;
      align-items: center;
    }
    .agent-box h3 {
      font-size: 1.8rem;
      font-weight: 800;
      margin-bottom: 14px;
      color: #ffffff;
    }
    .agent-box p {
      font-size: 0.95rem;
      color: rgba(255, 255, 255, 0.85);
      margin-bottom: 20px;
      line-height: 1.7;
    }
    .agent-qr-wrap {
      background: #ffffff;
      border-radius: var(--radius-md);
      padding: 20px;
      text-align: center;
      color: var(--text-main);
    }
    .agent-qr-wrap img {
      max-width: 160px;
      margin: 0 auto 10px auto;
      border-radius: var(--radius-sm);
    }

    /* 页脚 */
    .site-footer {
      background: #091e42;
      color: #cfd7e6;
      padding: 50px 0 24px 0;
      border-top: 1px solid rgba(255, 255, 255, 0.1);
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1fr;
      gap: 30px;
      margin-bottom: 40px;
    }
    .footer-col h4 {
      font-size: 1rem;
      font-weight: 700;
      color: #ffffff;
      margin-bottom: 16px;
    }
    .footer-col p {
      font-size: 0.88rem;
      line-height: 1.6;
      margin-bottom: 10px;
    }
    .footer-links-list {
      list-style: none;
    }
    .footer-links-list li {
      margin-bottom: 8px;
    }
    .footer-links-list li a {
      color: #cfd7e6;
      font-size: 0.88rem;
    }
    .footer-links-list li a:hover {
      color: #ffffff;
    }
    .friend-links-box {
      border-top: 1px solid rgba(255, 255, 255, 0.1);
      padding-top: 20px;
      margin-bottom: 20px;
      font-size: 0.85rem;
    }
    .friend-links-box a {
      color: #9fb3d0;
      margin-right: 14px;
      display: inline-block;
      margin-bottom: 6px;
    }
    .friend-links-box a:hover {
      color: #ffffff;
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding-top: 20px;
      text-align: center;
      font-size: 0.82rem;
      color: #7a8fae;
    }

    /* 浮动客服挂件 */
    .float-dock {
      position: fixed;
      right: 20px;
      bottom: 40px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .dock-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: var(--primary);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.1rem;
      box-shadow: var(--shadow-md);
      cursor: pointer;
      border: none;
      transition: all 0.2s ease;
      text-decoration: none;
    }
    .dock-btn:hover {
      background: var(--primary-dark);
      transform: scale(1.08);
      color: #ffffff;
    }

    /* 响应式断点 */
    @media (max-width: 992px) {
      .hero-title { font-size: 2.2rem; }
      .card-grid-4 { grid-template-columns: repeat(2, 1fr); }
      .card-grid-3 { grid-template-columns: repeat(2, 1fr); }
      .token-grid { grid-template-columns: 1fr; }
      .process-steps { grid-template-columns: repeat(2, 1fr); }
      .platform-grid { grid-template-columns: 1fr; }
      .case-grid { grid-template-columns: 1fr; }
      .review-grid { grid-template-columns: 1fr; }
      .hero-feature-deck { grid-template-columns: repeat(2, 1fr); }
      .agent-box { grid-template-columns: 1fr; text-align: center; }
      .footer-grid { grid-template-columns: 1fr 1fr; }
      .custom-form { grid-template-columns: 1fr; }
      .form-group.full-width { grid-column: span 1; }
    }
    @media (max-width: 768px) {
      .nav-links {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #ffffff;
        border-bottom: 1px solid var(--border-color);
        padding: 16px 20px;
        box-shadow: var(--shadow-md);
      }
      .nav-links.show {
        display: flex;
      }
      .nav-toggle-btn {
        display: block;
      }
      .card-grid-4 { grid-template-columns: 1fr; }
      .card-grid-3 { grid-template-columns: 1fr; }
      .article-links-grid { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr; }
      .hero-feature-deck { grid-template-columns: 1fr; }
    }