/* ==================== 缤纷糖果亮色风 核心 CSS ==================== */
    :root {
      --primary: #6c5ce7;
      --primary-hover: #5b4bc4;
      --accent-pink: #ff7675;
      --accent-cyan: #00cec9;
      --accent-yellow: #fdcb6e;
      --accent-orange: #e17055;
      --accent-blue: #0984e3;
      --bg-base: #f7f9fc;
      --bg-surface: #ffffff;
      --bg-card: #ffffff;
      --text-main: #2d3436;
      --text-muted: #636e72;
      --text-light: #b2bec3;
      --border-color: #e2e8f0;
      --shadow-sm: 0 4px 12px rgba(108, 92, 231, 0.08);
      --shadow-md: 0 8px 24px rgba(108, 92, 231, 0.12);
      --shadow-lg: 0 16px 36px rgba(108, 92, 231, 0.16);
      --radius-sm: 8px;
      --radius-md: 16px;
      --radius-lg: 24px;
      --container-width: 1200px;
    }

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

    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      background-color: var(--bg-base);
      color: var(--text-main);
      line-height: 1.6;
    }

    body {
      overflow-x: hidden;
    }

    a {
      color: var(--primary);
      text-decoration: none;
      transition: all 0.25s ease;
    }

    a:hover {
      color: var(--primary-hover);
    }

    /* 统一居中容器 */
    .container {
      width: 100%;
      max-width: var(--container-width);
      margin: 0 auto;
      padding: 0 20px;
    }

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

    .section-title-wrap {
      text-align: center;
      margin-bottom: 50px;
    }

    .section-badge {
      display: inline-block;
      padding: 6px 16px;
      background: rgba(108, 92, 231, 0.1);
      color: var(--primary);
      font-weight: 600;
      font-size: 14px;
      border-radius: 20px;
      margin-bottom: 12px;
    }

    .section-title {
      font-size: 32px;
      font-weight: 800;
      color: var(--text-main);
      letter-spacing: -0.5px;
      margin-bottom: 12px;
    }

    .section-subtitle {
      font-size: 16px;
      color: var(--text-muted);
      max-width: 700px;
      margin: 0 auto;
    }

    /* 按钮基础 */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 12px 28px;
      font-size: 16px;
      font-weight: 700;
      border-radius: 30px;
      border: none;
      cursor: pointer;
      transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
      text-decoration: none;
      box-shadow: 0 4px 14px rgba(0,0,0,0.08);
    }

    .btn-primary {
      background: linear-gradient(135deg, var(--primary) 0%, #a55eea 100%);
      color: #ffffff !important;
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 20px rgba(108, 92, 231, 0.35);
    }

    .btn-accent {
      background: linear-gradient(135deg, #ff7675 0%, #ff6b81 100%);
      color: #ffffff !important;
    }

    .btn-accent:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 20px rgba(255, 118, 117, 0.35);
    }

    .btn-outline {
      background: #ffffff;
      color: var(--primary) !important;
      border: 2px solid var(--primary);
    }

    .btn-outline:hover {
      background: var(--primary);
      color: #ffffff !important;
      transform: translateY(-2px);
    }

    /* ==================== 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 rgba(0, 0, 0, 0.05);
      box-shadow: var(--shadow-sm);
    }

    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 76px;
    }

    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .ai-page-logo {
      height: 40px;
      width: auto;
      object-fit: contain;
    }

    /* 明确要求 nav-links 的 gap 属性为 0 */
    .nav-links {
      display: flex;
      align-items: center;
      list-style: none;
      gap: 0;
    }

    .nav-links li {
      margin: 0 4px;
    }

    .nav-links a {
      padding: 8px 12px;
      font-size: 14px;
      font-weight: 600;
      color: var(--text-main);
      border-radius: 8px;
      display: inline-block;
    }

    .nav-links a:hover {
      color: var(--primary);
      background: rgba(108, 92, 231, 0.06);
    }

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

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

    /* ==================== 首屏 Hero (无图片) ==================== */
    .hero-section {
      background: linear-gradient(135deg, #f3f0ff 0%, #e8f4ff 50%, #fff0f5 100%);
      padding: 100px 0 80px;
      text-align: center;
      position: relative;
      overflow: hidden;
    }

    /* 装饰性纯 CSS 浮动圆圈 */
    .hero-bg-shape {
      position: absolute;
      border-radius: 50%;
      filter: blur(50px);
      opacity: 0.6;
      z-index: 0;
    }
    .shape-1 { width: 300px; height: 300px; background: #a55eea; top: -50px; left: -50px; }
    .shape-2 { width: 350px; height: 350px; background: #7bed9f; bottom: -80px; right: -50px; }
    .shape-3 { width: 250px; height: 250px; background: #ff7675; top: 40%; left: 70%; }

    .hero-content {
      position: relative;
      z-index: 1;
      max-width: 900px;
      margin: 0 auto;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 8px 20px;
      background: #ffffff;
      border-radius: 30px;
      box-shadow: 0 4px 15px rgba(0,0,0,0.06);
      margin-bottom: 24px;
      font-size: 14px;
      font-weight: 700;
      color: var(--primary);
    }

    .hero-title {
      font-size: 42px;
      line-height: 1.25;
      font-weight: 900;
      color: #1e272e;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

    .hero-title .gradient-text {
      background: linear-gradient(135deg, #6c5ce7 0%, #ff7675 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-desc {
      font-size: 18px;
      color: var(--text-muted);
      margin-bottom: 36px;
      line-height: 1.7;
    }

    .hero-btns {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 40px;
    }

    .hero-tags {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 10px;
    }

    .hero-tag-item {
      background: rgba(255, 255, 255, 0.8);
      padding: 6px 14px;
      border-radius: 20px;
      font-size: 13px;
      color: var(--text-main);
      font-weight: 600;
      border: 1px solid rgba(0, 0, 0, 0.05);
    }

    /* ==================== 数据指标卡片 ==================== */
    .metrics-section {
      margin-top: -40px;
      padding-top: 0;
      z-index: 10;
    }

    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
      gap: 20px;
    }

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

    .metric-card:hover {
      transform: translateY(-5px);
    }

    .metric-num {
      font-size: 36px;
      font-weight: 900;
      color: var(--primary);
      margin-bottom: 4px;
      font-family: Arial, sans-serif;
    }

    .metric-label {
      font-size: 14px;
      color: var(--text-muted);
      font-weight: 600;
    }

    /* ==================== 服务能力与场景卡片 (缤纷色系) ==================== */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
      gap: 24px;
    }

    .service-card {
      background: var(--bg-surface);
      border-radius: var(--radius-md);
      padding: 28px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .service-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-lg);
      border-color: transparent;
    }

    .card-accent-1 { border-top: 5px solid #6c5ce7; }
    .card-accent-2 { border-top: 5px solid #ff7675; }
    .card-accent-3 { border-top: 5px solid #00cec9; }
    .card-accent-4 { border-top: 5px solid #fdcb6e; }

    .service-icon {
      width: 50px;
      height: 50px;
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 24px;
      margin-bottom: 20px;
      font-weight: bold;
    }

    .icon-p1 { background: rgba(108, 92, 231, 0.12); color: #6c5ce7; }
    .icon-p2 { background: rgba(255, 118, 117, 0.12); color: #ff7675; }
    .icon-p3 { background: rgba(0, 206, 201, 0.12); color: #00cec9; }
    .icon-p4 { background: rgba(253, 203, 110, 0.2); color: #d63031; }

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

    .service-desc {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 20px;
    }

    /* ==================== 案例中心 (支持可视化图片展示) ==================== */
    .cases-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
      gap: 30px;
    }

    .case-card {
      background: var(--bg-surface);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--border-color);
      transition: all 0.3s ease;
    }

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

    .case-img-wrap {
      width: 100%;
      height: 200px;
      overflow: hidden;
      background: #eef2f7;
      display: flex;
      align-items: center;
      justify-content: center;
    }

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

    .case-title {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--text-main);
    }

    .case-desc {
      font-size: 14px;
      color: var(--text-muted);
      margin-bottom: 16px;
    }

    /* ==================== 对比评测板块 (5星, 9.9分) ==================== */
    .eval-section {
      background: #ffffff;
      border-radius: var(--radius-lg);
      padding: 50px 40px;
      box-shadow: var(--shadow-md);
      border: 1px solid var(--border-color);
    }

    .rating-banner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      background: linear-gradient(135deg, #6c5ce7 0%, #a55eea 100%);
      color: #ffffff;
      padding: 24px 32px;
      border-radius: var(--radius-md);
      margin-bottom: 40px;
      flex-wrap: wrap;
      gap: 20px;
    }

    .rating-score {
      display: flex;
      align-items: center;
      gap: 16px;
    }

    .big-num {
      font-size: 48px;
      font-weight: 900;
      line-height: 1;
    }

    .star-wrap {
      font-size: 24px;
      color: #fdcb6e;
    }

    .eval-table-wrap {
      width: 100%;
      overflow-x: auto;
    }

    .eval-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 600px;
    }

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

    .eval-table th {
      background: #f8f9fe;
      font-size: 15px;
      font-weight: 700;
      color: var(--text-main);
    }

    .eval-table td {
      font-size: 14px;
      color: var(--text-muted);
    }

    .eval-table tr:hover {
      background: rgba(108, 92, 231, 0.02);
    }

    .highlight-cell {
      color: var(--primary) !important;
      font-weight: 700;
    }

    /* ==================== Token 比价与模型支持 ==================== */
    .token-table-wrap {
      background: #ffffff;
      border-radius: var(--radius-md);
      padding: 30px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

    .model-pills {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-top: 20px;
    }

    .model-pill {
      background: #f1f2f6;
      color: var(--text-main);
      font-size: 13px;
      font-weight: 600;
      padding: 6px 14px;
      border-radius: 20px;
      border: 1px solid #dfe4ea;
    }

    /* ==================== 标准流程步骤 ==================== */
    .process-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
      gap: 20px;
    }

    .process-card {
      background: #ffffff;
      padding: 24px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      position: relative;
    }

    .process-step {
      font-size: 14px;
      font-weight: 900;
      color: var(--accent-pink);
      margin-bottom: 8px;
    }

    .process-title {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 8px;
    }

    /* ==================== 客户评论 (6条) ==================== */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
      gap: 24px;
    }

    .review-card {
      background: #ffffff;
      border-radius: var(--radius-md);
      padding: 24px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

    .review-user {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 16px;
    }

    .avatar-placeholder {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--primary) 0%, var(--accent-pink) 100%);
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: bold;
    }

    .user-info .name {
      font-size: 16px;
      font-weight: 700;
    }

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

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

    /* ==================== FAQ 折叠面板 ==================== */
    .faq-list {
      max-width: 900px;
      margin: 0 auto;
    }

    .faq-item {
      background: #ffffff;
      border-radius: var(--radius-sm);
      margin-bottom: 14px;
      border: 1px solid var(--border-color);
      overflow: hidden;
    }

    .faq-question {
      padding: 20px 24px;
      font-size: 16px;
      font-weight: 700;
      color: var(--text-main);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .faq-question::after {
      content: '+';
      font-size: 20px;
      color: var(--primary);
      transition: transform 0.3s ease;
    }

    .faq-item.active .faq-question::after {
      content: '-';
      transform: rotate(180deg);
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      background: #fcfcfd;
      padding: 0 24px;
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    .faq-item.active .faq-answer {
      max-height: 300px;
      padding: 16px 24px 24px;
      border-top: 1px solid #f1f2f6;
    }

    /* ==================== 文章列表 ==================== */
    .articles-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 20px;
    }

    .article-item {
      background: #ffffff;
      border-radius: var(--radius-sm);
      padding: 20px;
      border: 1px solid var(--border-color);
    }

    .article-item h4 {
      font-size: 16px;
      margin-bottom: 8px;
    }

    /* ==================== 联系与需求表单 ==================== */
    .contact-wrapper {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      background: #ffffff;
      border-radius: var(--radius-lg);
      padding: 40px;
      box-shadow: var(--shadow-md);
      border: 1px solid var(--border-color);
    }

    .contact-info {
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .qr-box {
      margin-top: 20px;
      display: flex;
      align-items: center;
      gap: 20px;
    }

    .qr-box img {
      width: 130px;
      height: 130px;
      border-radius: 8px;
      border: 1px solid var(--border-color);
    }

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

    .form-group label {
      display: block;
      font-size: 14px;
      font-weight: 700;
      margin-bottom: 8px;
      color: var(--text-main);
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      font-size: 14px;
      outline: none;
      transition: border 0.3s ease;
    }

    .form-control:focus {
      border-color: var(--primary);
    }

    /* ==================== 页脚与友情链接 ==================== */
    .site-footer {
      background: #1e272e;
      color: #dcdde1;
      padding: 60px 0 30px;
    }

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

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

    .footer-col ul {
      list-style: none;
    }

    .footer-col ul li {
      margin-bottom: 10px;
    }

    .footer-col ul li a {
      color: #a4b0be;
      font-size: 14px;
    }

    .footer-col ul li a:hover {
      color: #ffffff;
    }

    .friend-links {
      border-top: 1px solid #353b48;
      padding-top: 24px;
      margin-bottom: 24px;
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      align-items: center;
    }

    .friend-links span {
      font-size: 14px;
      font-weight: bold;
      color: #ffffff;
    }

    .friend-links a {
      color: #a4b0be;
      font-size: 13px;
    }

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

    .copyright {
      text-align: center;
      font-size: 13px;
      color: #718093;
      border-top: 1px solid #2f3640;
      padding-top: 20px;
    }

    /* 浮动客服入口 */
    .floating-cs {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-btn {
      width: 50px;
      height: 50px;
      border-radius: 50%;
      background: var(--primary);
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 4px 15px rgba(0,0,0,0.2);
      cursor: pointer;
      font-size: 20px;
      transition: transform 0.3s ease;
    }

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

    /* 响应式适配 */
    @media (max-width: 992px) {
      .hero-title { font-size: 32px; }
      .contact-wrapper { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr 1fr; }
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
        position: absolute;
        top: 76px;
        left: 0;
        width: 100%;
        background: #ffffff;
        flex-direction: column;
        padding: 20px 0;
        box-shadow: var(--shadow-md);
      }
      .nav-links.active { display: flex; }
      .nav-links li { margin: 8px 0; }
      .mobile-toggle { display: block; }
      .hero-section { padding: 60px 0 40px; }
      .hero-title { font-size: 26px; }
      .footer-grid { grid-template-columns: 1fr; }
    }