/* ----------------------------------------------------
       明艳撞色风格企业官网 Base CSS
    ---------------------------------------------------- */
    :root {
      --primary: #4f46e5;
      --primary-hover: #4338ca;
      --accent-orange: #ff5722;
      --accent-cyan: #06b6d4;
      --accent-amber: #f59e0b;
      --bg-main: #f8fafc;
      --bg-card: #ffffff;
      --text-dark: #0f172a;
      --text-muted: #475569;
      --border-color: #e2e8f0;
      --shadow-sm: 0 4px 6px -1px rgba(0,0,0,0.05);
      --shadow-md: 0 10px 25px -5px rgba(79,70,229,0.1);
      --shadow-lg: 0 20px 30px -10px rgba(0,0,0,0.12);
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 24px;
    }

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

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      background-color: var(--bg-main);
      color: var(--text-dark);
      line-height: 1.6;
      overflow-x: hidden;
    }

    a {
      color: var(--primary);
      text-decoration: none;
      transition: all 0.2s ease;
    }

    a:hover {
      color: var(--accent-orange);
    }

    /* 统一大容器 */
    .container {
      width: 100%;
      max-width: 1240px;
      margin: 0 auto;
      padding: 0 24px;
    }

    .section-padding {
      padding: 80px 0;
    }

    .section-header {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 50px auto;
    }

    .section-tag {
      display: inline-block;
      padding: 6px 16px;
      background: rgba(79,70,229,0.1);
      color: var(--primary);
      font-weight: 700;
      font-size: 14px;
      border-radius: 50px;
      margin-bottom: 12px;
      letter-spacing: 0.5px;
      border: 1px solid rgba(79,70,229,0.2);
    }

    .section-title {
      font-size: 32px;
      font-weight: 800;
      color: var(--text-dark);
      letter-spacing: -0.5px;
      margin-bottom: 14px;
    }

    .section-desc {
      font-size: 16px;
      color: var(--text-muted);
    }

    /* 按钮样式 */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 14px 28px;
      font-size: 16px;
      font-weight: 700;
      border-radius: var(--radius-sm);
      cursor: pointer;
      border: none;
      transition: all 0.25s ease;
      gap: 8px;
    }

    .btn-primary {
      background: linear-gradient(135deg, var(--primary) 0%, #6366f1 100%);
      color: #ffffff !important;
      box-shadow: 0 8px 20px rgba(79,70,229,0.3);
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 12px 25px rgba(79,70,229,0.4);
    }

    .btn-accent {
      background: linear-gradient(135deg, var(--accent-orange) 0%, #ff7849 100%);
      color: #ffffff !important;
      box-shadow: 0 8px 20px rgba(255,87,34,0.3);
    }

    .btn-accent:hover {
      transform: translateY(-2px);
      box-shadow: 0 12px 25px rgba(255,87,34,0.4);
    }

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

    .btn-outline:hover {
      border-color: var(--primary);
      color: var(--primary) !important;
    }

    /* ----------------------------------------------------
       顶部导航栏
    ---------------------------------------------------- */
    .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);
    }

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

    .logo-area {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .ai-page-logo {
      height: 42px;
      width: auto;
      object-fit: contain;
    }

    /* 要求的 .nav-links gap 属性必须为 0 */
    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      list-style: none;
    }

    .nav-links li a {
      display: block;
      padding: 8px 12px;
      font-size: 14px;
      font-weight: 600;
      color: var(--text-dark);
      border-radius: 6px;
    }

    .nav-links li a:hover {
      color: var(--primary);
      background: rgba(79,70,229,0.05);
    }

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

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

    /* ----------------------------------------------------
       1. 首屏 Hero 区域（严禁出现任何图片）
    ---------------------------------------------------- */
    .hero-section {
      background: radial-gradient(circle at 80% 20%, rgba(6,182,212,0.12) 0%, rgba(248,250,252,0) 50%),
                  radial-gradient(circle at 10% 80%, rgba(79,70,229,0.15) 0%, rgba(248,250,252,0) 50%),
                  #ffffff;
      padding: 90px 0 70px 0;
      position: relative;
      overflow: hidden;
      border-bottom: 1px solid var(--border-color);
    }

    .hero-wrapper {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 40px;
      align-items: center;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 14px;
      background: linear-gradient(90deg, rgba(255,87,34,0.1), rgba(79,70,229,0.1));
      border: 1px solid rgba(255,87,34,0.3);
      border-radius: 30px;
      font-size: 13px;
      font-weight: 700;
      color: var(--accent-orange);
      margin-bottom: 20px;
    }

    .hero-title {
      font-size: 40px;
      line-height: 1.2;
      font-weight: 900;
      color: var(--text-dark);
      margin-bottom: 20px;
      letter-spacing: -0.8px;
    }

    .hero-subtitle {
      font-size: 18px;
      color: var(--text-muted);
      margin-bottom: 32px;
      line-height: 1.6;
    }

    .hero-ctas {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 40px;
    }

    .hero-features-list {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 14px;
    }

    .hero-feat-item {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 14px;
      font-weight: 600;
      color: var(--text-dark);
    }

    .hero-feat-icon {
      width: 20px;
      height: 20px;
      border-radius: 50%;
      background: rgba(6,182,212,0.15);
      color: var(--accent-cyan);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 12px;
      font-weight: 900;
    }

    /* 首屏纯 CSS 科技感数据展示卡片（替代无图） */
    .hero-card-panel {
      background: #ffffff;
      border-radius: var(--radius-lg);
      border: 2px solid var(--border-color);
      padding: 30px;
      box-shadow: var(--shadow-lg);
      position: relative;
    }

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

    .panel-dots {
      display: flex;
      gap: 6px;
    }

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

    .dot-1 { background: #ff5f56; }
    .dot-2 { background: #ffbd2e; }
    .dot-3 { background: #27c93f; }

    .panel-status {
      font-size: 12px;
      font-weight: 700;
      color: #10b981;
      background: rgba(16,185,129,0.1);
      padding: 4px 10px;
      border-radius: 20px;
    }

    .hero-metrics-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 16px;
    }

    .metric-box {
      background: var(--bg-main);
      padding: 20px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
    }

    .metric-value {
      font-size: 28px;
      font-weight: 900;
      color: var(--primary);
      margin-bottom: 4px;
    }

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

    /* ----------------------------------------------------
       通用的卡片与区块样式
    ---------------------------------------------------- */
    .cards-grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .cards-grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .feature-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px;
      transition: all 0.3s ease;
      box-shadow: var(--shadow-sm);
    }

    .feature-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-md);
      border-color: var(--primary);
    }

    .card-icon {
      width: 52px;
      height: 52px;
      border-radius: 12px;
      background: rgba(79,70,229,0.1);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 24px;
      margin-bottom: 20px;
      font-weight: 900;
    }

    .card-title {
      font-size: 20px;
      font-weight: 700;
      margin-bottom: 10px;
    }

    .card-desc {
      font-size: 14px;
      color: var(--text-muted);
    }

    /* ----------------------------------------------------
       对比评测板块 (5星, 9.9分)
    ---------------------------------------------------- */
    .rating-banner {
      background: linear-gradient(135deg, #0f172a 0%, #1e1b4b 100%);
      color: #ffffff;
      border-radius: var(--radius-lg);
      padding: 40px;
      margin-bottom: 40px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      box-shadow: var(--shadow-lg);
    }

    .rating-score-box {
      display: flex;
      align-items: center;
      gap: 24px;
    }

    .score-big {
      font-size: 54px;
      font-weight: 900;
      color: var(--accent-amber);
      line-height: 1;
    }

    .score-stars {
      color: #f59e0b;
      font-size: 22px;
      margin-bottom: 4px;
    }

    .compare-table {
      width: 100%;
      border-collapse: collapse;
      background: #ffffff;
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--border-color);
    }

    .compare-table th, .compare-table td {
      padding: 16px 20px;
      text-align: left;
      border-bottom: 1px solid var(--border-color);
      font-size: 14px;
    }

    .compare-table th {
      background: #f1f5f9;
      font-weight: 700;
      color: var(--text-dark);
    }

    .compare-table td.highlight {
      background: rgba(79,70,229,0.05);
      font-weight: 700;
      color: var(--primary);
    }

    /* ----------------------------------------------------
       Token 比价表格
    ---------------------------------------------------- */
    .pricing-table-wrapper {
      overflow-x: auto;
      background: #ffffff;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

    .pricing-table {
      width: 100%;
      border-collapse: collapse;
      min-width: 650px;
    }

    .pricing-table th, .pricing-table td {
      padding: 16px 24px;
      text-align: left;
      border-bottom: 1px solid var(--border-color);
    }

    .pricing-table th {
      background: #f8fafc;
      font-weight: 700;
    }

    .badge-discount {
      display: inline-block;
      padding: 2px 8px;
      background: rgba(255,87,34,0.1);
      color: var(--accent-orange);
      font-size: 12px;
      font-weight: 700;
      border-radius: 4px;
    }

    /* ----------------------------------------------------
       案例展示区
    ---------------------------------------------------- */
    .case-card {
      background: #ffffff;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      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: #e2e8f0;
    }

    .case-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    .case-body {
      padding: 20px;
    }

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

    .case-desc {
      font-size: 13px;
      color: var(--text-muted);
    }

    /* ----------------------------------------------------
       FAQ 折叠面板
    ---------------------------------------------------- */
    .faq-accordion {
      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: var(--radius-md);
      overflow: hidden;
    }

    .faq-header {
      padding: 20px 24px;
      font-weight: 700;
      font-size: 16px;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
    }

    .faq-header:hover {
      background: #f8fafc;
    }

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

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

    .faq-body {
      padding: 0 24px 20px 24px;
      font-size: 14px;
      color: var(--text-muted);
      display: none;
      line-height: 1.7;
    }

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

    /* ----------------------------------------------------
       用户评论
    ---------------------------------------------------- */
    .reviews-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;
      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: var(--primary);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 16px;
    }

    .user-info h4 {
      font-size: 15px;
      font-weight: 700;
    }

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

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

    .contact-info {
      display: flex;
      flex-direction: column;
      gap: 20px;
    }

    .info-item {
      display: flex;
      align-items: flex-start;
      gap: 14px;
    }

    .info-icon {
      width: 40px;
      height: 40px;
      background: rgba(6,182,212,0.1);
      color: var(--accent-cyan);
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
    }

    .qr-container {
      margin-top: 10px;
      display: flex;
      align-items: center;
      gap: 16px;
      background: var(--bg-main);
      padding: 16px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
    }

    .qr-container img {
      width: 100px;
      height: 100px;
      object-fit: contain;
      border-radius: 6px;
    }

    .form-group {
      margin-bottom: 18px;
    }

    .form-group label {
      display: block;
      font-size: 14px;
      font-weight: 700;
      margin-bottom: 6px;
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 14px;
      outline: none;
      transition: border 0.2s;
    }

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

    textarea.form-control {
      height: 110px;
      resize: vertical;
    }

    /* ----------------------------------------------------
       页脚与友情链接
    ---------------------------------------------------- */
    .footer {
      background: #0f172a;
      color: #94a3b8;
      padding: 60px 0 30px 0;
      border-top: 1px solid #1e293b;
    }

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

    .footer-brand h3 {
      color: #ffffff;
      font-size: 20px;
      margin-bottom: 12px;
    }

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

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

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

    .footer-links ul li a {
      color: #94a3b8;
      font-size: 14px;
    }

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

    .friend-links {
      border-top: 1px solid #1e293b;
      padding-top: 24px;
      margin-bottom: 24px;
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      align-items: center;
    }

    .friend-links span {
      color: #ffffff;
      font-weight: 700;
      font-size: 14px;
    }

    .friend-links a {
      color: #94a3b8;
      font-size: 13px;
    }

    .friend-links a:hover {
      color: var(--accent-orange);
    }

    .footer-bottom {
      text-align: center;
      font-size: 13px;
      border-top: 1px solid #1e293b;
      padding-top: 24px;
    }

    /* ----------------------------------------------------
       浮动悬浮挂件
    ---------------------------------------------------- */
    .float-widget {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .float-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: var(--primary);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: var(--shadow-md);
      cursor: pointer;
      font-weight: 800;
      border: none;
    }

    .float-btn:hover {
      background: var(--accent-orange);
    }

    /* 响应式适配 */
    @media (max-width: 992px) {
      .hero-wrapper, .contact-wrapper, .rating-banner {
        grid-template-columns: 1fr;
        flex-direction: column;
      }

      .cards-grid-3, .cards-grid-4, .reviews-grid {
        grid-template-columns: repeat(2, 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;
        box-shadow: var(--shadow-md);
        border-bottom: 1px solid var(--border-color);
      }

      .nav-links.active {
        display: flex;
      }

      .mobile-toggle {
        display: block;
      }

      .hero-title {
        font-size: 30px;
      }

      .cards-grid-3, .cards-grid-4, .reviews-grid {
        grid-template-columns: 1fr;
      }

      .footer-grid {
        grid-template-columns: 1fr;
      }
    }