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

    body {
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
      background: linear-gradient(135deg, #6C8EBF 0%, #D6E3F8 100%);
      min-height: 100vh;
      display: flex;
      justify-content: center;
      align-items: center;
      padding: 20px;
    }

    .container {
      background: #ffffff;
      max-width: 900px;
      width: 100%;
      border-radius: 16px;
      box-shadow: 0 20px 60px rgba(108, 142, 191, 0.3);
      overflow: hidden;
    }

    .header {
      background: linear-gradient(135deg, #6C8EBF 0%, #8FA8C9 100%);
      color: white;
      padding: 40px;
      text-align: center;
    }

    .header h1 {
      font-size: 32px;
      font-weight: 700;
      margin-bottom: 10px;
    }

    .header p {
      font-size: 16px;
      opacity: 0.9;
    }

    .content {
      padding: 40px;
    }

    .section {
      margin-bottom: 40px;
    }

    .section-title {
      font-size: 20px;
      font-weight: 700;
      color: #333;
      margin-bottom: 20px;
      padding-bottom: 10px;
      border-bottom: 2px solid #6C8EBF;
    }

    .data-source {
      background: #F5F5F5;
      border-left: 4px solid #6C8EBF;
      padding: 20px;
      margin-bottom: 16px;
      border-radius: 8px;
      transition: all 0.3s ease;
    }

    .data-source:hover {
      box-shadow: 0 4px 12px rgba(108, 142, 191, 0.2);
      transform: translateX(4px);
    }

    .data-source-name {
      font-size: 18px;
      font-weight: 600;
      color: #6C8EBF;
      margin-bottom: 8px;
    }

    .data-source-desc {
      font-size: 14px;
      color: #666;
      line-height: 1.6;
      margin-bottom: 12px;
    }

    .data-source-link {
      display: inline-flex;
      align-items: center;
      color: #6C8EBF;
      text-decoration: none;
      font-weight: 500;
      font-size: 14px;
      transition: all 0.3s ease;
    }

    .data-source-link:hover {
      color: #5A7AA8;
      text-decoration: underline;
    }

    .data-source-link::before {
      content: "🔗";
      margin-right: 6px;
    }

    .disclaimer {
      background: #fff3cd;
      border: 1px solid #ffc107;
      border-radius: 8px;
      padding: 20px;
      margin-top: 30px;
    }

    .disclaimer-title {
      font-size: 16px;
      font-weight: 700;
      color: #856404;
      margin-bottom: 10px;
    }

    .disclaimer-text {
      font-size: 14px;
      color: #856404;
      line-height: 1.8;
    }

    .footer {
      background: #f8f9fa;
      padding: 20px;
      text-align: center;
      font-size: 14px;
      color: #666;
    }

    .footer a {
      color: #6C8EBF;
      text-decoration: none;
    }

    .footer a:hover {
      text-decoration: underline;
    }

    .back-btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background: linear-gradient(135deg, #6C8EBF 0%, #8FA8C9 100%);
      color: white;
      padding: 12px 30px;
      border-radius: 8px;
      text-decoration: none;
      font-weight: 600;
      margin-top: 20px;
      transition: all 0.3s ease;
    }

    .back-btn:hover {
      box-shadow: 0 6px 20px rgba(108, 142, 191, 0.4);
      transform: translateY(-2px);
    }

    .back-btn::before {
      content: "← ";
      margin-right: 6px;
    }

    @media (max-width: 768px) {
      .header {
        padding: 30px 20px;
      }

      .header h1 {
        font-size: 24px;
      }

      .content {
        padding: 20px;
      }

      .section-title {
        font-size: 18px;
      }

      .data-source {
        padding: 16px;
      }
    }