/* 基础复位与主题设置：镭射幻彩风格（浅色基底 + 幻彩高光 + 深色文字保证清晰可读） */
    :root {
      --primary-color: #5b21b6;
      --primary-gradient: linear-gradient(135deg, #6366f1 0%, #a855f7 50%, #ec4899 100%);
      --hologram-bg: linear-gradient(120deg, #f0f4ff 0%, #faeefd 35%, #f0fdf4 70%, #fff7ed 100%);
      --card-bg: rgba(255, 255, 255, 0.85);
      --card-border: 1px solid rgba(168, 85, 247, 0.2);
      --text-main: #1e1b4b;
      --text-muted: #4c1d95;
      --text-sub: #475569;
      --accent-color: #d946ef;
      --shadow-sm: 0 4px 12px rgba(147, 51, 234, 0.08);
      --shadow-lg: 0 12px 32px rgba(147, 51, 234, 0.15);
      --radius: 12px;
      --max-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, "Noto Sans", sans-serif;
      background-color: #f8fafc;
      color: var(--text-main);
      line-height: 1.6;
    }

    body {
      background: var(--hologram-bg);
      background-attachment: fixed;
      min-height: 100vh;
      overflow-x: hidden;
    }

    /* 统一全局容器 */
    .container {
      width: 100%;
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 0 20px;
    }

    /* 通用区块排版 */
    section {
      padding: 70px 0;
      position: relative;
    }

    .section-title-wrap {
      text-align: center;
      margin-bottom: 45px;
    }

    .section-tag {
      display: inline-block;
      padding: 4px 14px;
      font-size: 13px;
      font-weight: 600;
      color: var(--primary-color);
      background: rgba(168, 85, 247, 0.12);
      border-radius: 20px;
      margin-bottom: 10px;
      letter-spacing: 1px;
    }

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

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

    /* 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(168, 85, 247, 0.15);
      box-shadow: var(--shadow-sm);
    }

    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 70px;
    }

    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      text-decoration: none;
    }

    .ai-page-logo {
      height: 40px;
      width: auto;
      display: block;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 0; /* 按规则要求明确设置为0 */
      list-style: none;
    }

    .nav-links li a {
      display: inline-block;
      padding: 8px 12px;
      font-size: 14px;
      font-weight: 500;
      color: var(--text-main);
      text-decoration: none;
      transition: all 0.2s ease;
      border-radius: 6px;
    }

    .nav-links li a:hover {
      color: var(--primary-color);
      background: rgba(168, 85, 247, 0.08);
    }

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

    .btn-primary {
      display: inline-block;
      padding: 10px 22px;
      background: var(--primary-gradient);
      color: #ffffff !important;
      font-weight: 600;
      font-size: 14px;
      border-radius: 30px;
      text-decoration: none;
      box-shadow: 0 4px 14px rgba(168, 85, 247, 0.35);
      transition: transform 0.2s, box-shadow 0.2s;
      border: none;
      cursor: pointer;
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(168, 85, 247, 0.5);
    }

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

    /* 首屏 HERO 区域（严禁任何图片） */
    .hero-section {
      padding: 80px 0 60px 0;
      background: radial-gradient(circle at 50% 30%, rgba(217, 70, 239, 0.15), transparent 70%);
      text-align: center;
    }

    .hero-content {
      max-width: 900px;
      margin: 0 auto;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 18px;
      background: rgba(255, 255, 255, 0.9);
      border: 1px solid rgba(168, 85, 247, 0.3);
      border-radius: 30px;
      font-size: 14px;
      color: var(--primary-color);
      font-weight: 600;
      margin-bottom: 24px;
      box-shadow: var(--shadow-sm);
    }

    h1.hero-title {
      font-size: 34px;
      font-weight: 900;
      color: #0f172a;
      line-height: 1.3;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

    .hero-subtitle {
      font-size: 18px;
      color: #334155;
      margin-bottom: 35px;
      max-width: 760px;
      margin-left: auto;
      margin-right: auto;
    }

    .hero-actions {
      display: flex;
      justify-content: center;
      align-items: center;
      gap: 16px;
      margin-bottom: 45px;
      flex-wrap: wrap;
    }

    .btn-lg {
      padding: 14px 36px;
      font-size: 16px;
    }

    .btn-secondary {
      display: inline-block;
      padding: 14px 32px;
      background: #ffffff;
      color: var(--primary-color);
      font-weight: 600;
      font-size: 16px;
      border-radius: 30px;
      text-decoration: none;
      border: 1px solid rgba(168, 85, 247, 0.4);
      box-shadow: var(--shadow-sm);
      transition: all 0.2s;
    }

    .btn-secondary:hover {
      background: #fcf4ff;
      border-color: var(--accent-color);
      transform: translateY(-2px);
    }

    /* 视觉标签阵列（取代图片） */
    .hero-model-tags {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 8px;
      max-width: 850px;
      margin: 0 auto;
    }

    .model-pill {
      padding: 5px 12px;
      background: rgba(255, 255, 255, 0.7);
      border: 1px solid rgba(168, 85, 247, 0.2);
      border-radius: 6px;
      font-size: 12px;
      color: var(--text-muted);
      font-weight: 500;
    }

    /* 数据指标卡片 */
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: -30px;
    }

    .stat-card {
      background: var(--card-bg);
      border: var(--card-border);
      border-radius: var(--radius);
      padding: 24px;
      text-align: center;
      box-shadow: var(--shadow-sm);
      backdrop-filter: blur(8px);
    }

    .stat-num {
      font-size: 32px;
      font-weight: 800;
      color: var(--primary-color);
      margin-bottom: 4px;
    }

    .stat-label {
      font-size: 14px;
      color: var(--text-sub);
    }

    /* 服务能力通用网格 */
    .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: var(--card-bg);
      border: var(--card-border);
      border-radius: var(--radius);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
    }

    .service-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-lg);
      border-color: var(--accent-color);
    }

    .service-icon-box {
      width: 48px;
      height: 48px;
      border-radius: 10px;
      background: var(--primary-gradient);
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-size: 20px;
      font-weight: bold;
      margin-bottom: 18px;
    }

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

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

    /* 对比评测模块 */
    .rating-banner {
      background: linear-gradient(135deg, #ffffff 0%, #f3e8ff 100%);
      border: 2px solid rgba(168, 85, 247, 0.3);
      border-radius: var(--radius);
      padding: 30px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 30px;
      box-shadow: var(--shadow-sm);
    }

    .rating-score {
      display: flex;
      align-items: center;
      gap: 15px;
    }

    .score-num {
      font-size: 48px;
      font-weight: 900;
      color: var(--primary-color);
      line-height: 1;
    }

    .stars {
      color: #f59e0b;
      font-size: 22px;
      letter-spacing: 2px;
    }

    .compare-table-wrapper {
      overflow-x: auto;
      background: var(--card-bg);
      border: var(--card-border);
      border-radius: var(--radius);
      box-shadow: var(--shadow-sm);
    }

    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 650px;
    }

    .compare-table th, .compare-table td {
      padding: 16px 20px;
      border-bottom: 1px solid rgba(168, 85, 247, 0.12);
    }

    .compare-table th {
      background: rgba(168, 85, 247, 0.08);
      font-weight: 700;
      color: var(--text-main);
    }

    .highlight-cell {
      background: rgba(168, 85, 247, 0.05);
      font-weight: 700;
      color: var(--primary-color);
    }

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

    .step-card {
      background: var(--card-bg);
      border: var(--card-border);
      border-radius: var(--radius);
      padding: 24px;
      position: relative;
    }

    .step-num {
      font-size: 36px;
      font-weight: 900;
      color: rgba(168, 85, 247, 0.25);
      position: absolute;
      top: 15px;
      right: 20px;
    }

    /* 案例中心 */
    .case-card {
      background: var(--card-bg);
      border: var(--card-border);
      border-radius: var(--radius);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }

    .case-img-holder {
      width: 100%;
      overflow: hidden;
      background: #e2e8f0;
    }

    .ai-page-image {
      width: 100%;
      height: 200px;
      object-fit: cover;
      display: block;
      transition: transform 0.3s;
    }

    .case-card:hover .ai-page-image {
      transform: scale(1.05);
    }

    .case-body {
      padding: 20px;
    }

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

    .faq-item {
      background: var(--card-bg);
      border: var(--card-border);
      border-radius: var(--radius);
      overflow: hidden;
    }

    .faq-question {
      width: 100%;
      padding: 18px 24px;
      text-align: left;
      background: none;
      border: none;
      font-size: 16px;
      font-weight: 700;
      color: var(--text-main);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .faq-answer {
      padding: 0 24px 18px 24px;
      font-size: 14px;
      color: var(--text-sub);
      display: none;
      line-height: 1.7;
    }

    .faq-item.active .faq-answer {
      display: block;
    }

    .faq-icon {
      font-size: 18px;
      transition: transform 0.3s;
    }

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

    /* 客户评论 */
    .testimonial-card {
      background: var(--card-bg);
      border: var(--card-border);
      border-radius: var(--radius);
      padding: 24px;
      box-shadow: var(--shadow-sm);
    }

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

    .avatar-placeholder {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: var(--primary-gradient);
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: bold;
    }

    /* 表单与联系区域 */
    .contact-wrapper {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      background: var(--card-bg);
      border: var(--card-border);
      border-radius: var(--radius);
      padding: 40px;
      box-shadow: var(--shadow-lg);
    }

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

    .form-group label {
      display: block;
      font-size: 14px;
      font-weight: 600;
      margin-bottom: 6px;
      color: var(--text-main);
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid rgba(168, 85, 247, 0.3);
      border-radius: 8px;
      font-size: 14px;
      background: #ffffff;
      color: var(--text-main);
    }

    .form-control:focus {
      outline: none;
      border-color: var(--primary-color);
      box-shadow: 0 0 0 3px rgba(168, 85, 247, 0.15);
    }

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

    .qr-box {
      text-align: center;
      padding: 20px;
      background: #ffffff;
      border-radius: 12px;
      border: 1px dashed rgba(168, 85, 247, 0.4);
    }

    .qr-box img {
      width: 160px;
      height: 160px;
      object-fit: contain;
    }

    /* 页脚区域 */
    .site-footer {
      background: #0f172a;
      color: #94a3b8;
      padding: 60px 0 30px 0;
      margin-top: 60px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 40px;
      margin-bottom: 40px;
    }

    .footer-title {
      color: #f8fafc;
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 16px;
    }

    .footer-links {
      list-style: none;
    }

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

    .footer-links a {
      color: #94a3b8;
      text-decoration: none;
      font-size: 14px;
    }

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

    .friend-links {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
    }

    .friend-links a {
      color: #94a3b8;
      font-size: 13px;
      text-decoration: none;
    }

    .friend-links a:hover {
      color: #d946ef;
    }

    .footer-bottom {
      border-top: 1px solid #1e293b;
      padding-top: 25px;
      text-align: center;
      font-size: 13px;
      color: #64748b;
    }

    /* 浮动客服 */
    .float-kefu {
      position: fixed;
      right: 25px;
      bottom: 25px;
      z-index: 999;
      background: var(--primary-gradient);
      color: #fff;
      width: 56px;
      height: 56px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 8px 24px rgba(168, 85, 247, 0.4);
      cursor: pointer;
      font-size: 24px;
      text-decoration: none;
    }

    /* 响应式调整 */
    @media (max-width: 992px) {
      .grid-3, .grid-4, .process-steps, .stats-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .contact-wrapper {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      h1.hero-title {
        font-size: 26px;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        width: 100%;
        background: #ffffff;
        flex-direction: column;
        padding: 20px;
        box-shadow: var(--shadow-lg);
      }
      .nav-links.active {
        display: flex;
      }
      .mobile-menu-btn {
        display: block;
      }
      .grid-3, .grid-4, .process-steps, .stats-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
    }