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

      html {
        scroll-behavior: smooth;
      }

      body {
        font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
        line-height: 1.6;
        color: #1f2937;
        background-color: #ffffff;
      }

      /* 通用样式 */
      .container {
        max-width: 1200px;
        margin: 0 auto;
        padding: 0 20px;
      }

      a {
        color: #1e40af;
        text-decoration: none;
        transition: color 0.3s ease;
      }

      a:hover {
        color: #1e3a8a;
        text-decoration: underline;
      }

      button {
        font-family: inherit;
        cursor: pointer;
        border: none;
        border-radius: 6px;
        transition: all 0.3s ease;
      }

      /* 头部导航 */
      header {
        background-color: #ffffff;
        border-bottom: 1px solid #e5e7eb;
        position: sticky;
        top: 0;
        z-index: 100;
        box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
      }

      nav {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 16px 0;
      }

      .logo {
        font-size: 24px;
        font-weight: 700;
        color: #1e40af;
      }

      .nav-links {
        display: flex;
        gap: 30px;
        list-style: none;
      }

      .nav-links a {
        font-size: 14px;
        font-weight: 500;
        color: #4b5563;
      }

      .nav-links a:hover {
        color: #1e40af;
        text-decoration: none;
      }

      /* Hero区域 */
      .hero {
        background: linear-gradient(135deg, #1e40af 0%, #1e3a8a 100%);
        color: #ffffff;
        padding: 80px 0;
        text-align: center;
      }

      .hero h1 {
        font-size: 48px;
        font-weight: 700;
        margin-bottom: 20px;
        line-height: 1.2;
      }

      .hero p {
        font-size: 18px;
        margin-bottom: 30px;
        opacity: 0.95;
        max-width: 600px;
        margin-left: auto;
        margin-right: auto;
      }

      .hero-cta {
        display: flex;
        gap: 15px;
        justify-content: center;
        flex-wrap: wrap;
      }

      .btn {
        padding: 12px 32px;
        font-size: 16px;
        font-weight: 600;
        border-radius: 6px;
        transition: all 0.3s ease;
      }

      .btn-primary {
        background-color: #f97316;
        color: #ffffff;
      }

      .btn-primary:hover {
        background-color: #ea580c;
        transform: translateY(-2px);
        box-shadow: 0 4px 12px rgba(249, 115, 22, 0.3);
      }

      .btn-secondary {
        background-color: rgba(255, 255, 255, 0.2);
        color: #ffffff;
        border: 2px solid #ffffff;
      }

      .btn-secondary:hover {
        background-color: rgba(255, 255, 255, 0.3);
        transform: translateY(-2px);
      }

      /* 快速导航 */
      .quick-nav {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        gap: 20px;
        padding: 60px 0;
      }

      .nav-card {
        background: #f3f4f6;
        padding: 30px;
        border-radius: 8px;
        text-align: center;
        transition: all 0.3s ease;
        border: 2px solid transparent;
      }

      .nav-card:hover {
        background: #ffffff;
        border-color: #1e40af;
        box-shadow: 0 4px 12px rgba(30, 64, 175, 0.1);
        transform: translateY(-4px);
      }

      .nav-card h3 {
        font-size: 20px;
        margin-bottom: 10px;
        color: #1e40af;
      }

      .nav-card p {
        font-size: 14px;
        color: #6b7280;
      }

      /* 新手指南 */
      .guide-section {
        padding: 80px 0;
        background-color: #f9fafb;
      }

      .section-title {
        font-size: 36px;
        font-weight: 700;
        margin-bottom: 50px;
        text-align: center;
        color: #1f2937;
      }

      .section-subtitle {
        font-size: 14px;
        color: #f97316;
        font-weight: 600;
        text-transform: uppercase;
        letter-spacing: 1px;
        margin-bottom: 10px;
      }

      .guide-steps {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
        gap: 30px;
      }

      .step-card {
        background: #ffffff;
        padding: 30px;
        border-radius: 8px;
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
        transition: all 0.3s ease;
      }

      .step-card:hover {
        box-shadow: 0 8px 16px rgba(0, 0, 0, 0.12);
        transform: translateY(-4px);
      }

      .step-number {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        width: 50px;
        height: 50px;
        background-color: #1e40af;
        color: #ffffff;
        border-radius: 50%;
        font-size: 24px;
        font-weight: 700;
        margin-bottom: 15px;
      }

      .step-card h3 {
        font-size: 18px;
        margin-bottom: 10px;
        color: #1f2937;
      }

      .step-card p {
        font-size: 14px;
        color: #6b7280;
        line-height: 1.6;
      }

      /* 平台对比 */
      .comparison-section {
        padding: 80px 0;
      }

      .comparison-table {
        width: 100%;
        border-collapse: collapse;
        background: #ffffff;
        border-radius: 8px;
        overflow: hidden;
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
      }

      .comparison-table thead {
        background-color: #1e40af;
        color: #ffffff;
      }

      .comparison-table th {
        padding: 16px;
        text-align: left;
        font-weight: 600;
        font-size: 14px;
      }

      .comparison-table td {
        padding: 16px;
        border-bottom: 1px solid #e5e7eb;
        font-size: 14px;
      }

      .comparison-table tbody tr:hover {
        background-color: #f9fafb;
      }

      .comparison-table tbody tr:last-child td {
        border-bottom: none;
      }

      .platform-name {
        font-weight: 600;
        color: #1f2937;
      }

      .badge {
        display: inline-block;
        padding: 4px 12px;
        border-radius: 20px;
        font-size: 12px;
        font-weight: 600;
      }

      .badge-safe {
        background-color: #dcfce7;
        color: #166534;
      }

      .badge-warning {
        background-color: #fef3c7;
        color: #92400e;
      }

      /* 安全提示 */
      .security-section {
        padding: 80px 0;
        background-color: #f9fafb;
      }

      .security-tips {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
        gap: 30px;
      }

      .tip-card {
        background: #ffffff;
        padding: 30px;
        border-radius: 8px;
        border-left: 4px solid #f97316;
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
      }

      .tip-card h3 {
        font-size: 18px;
        margin-bottom: 10px;
        color: #1f2937;
      }

      .tip-card p {
        font-size: 14px;
        color: #6b7280;
        line-height: 1.6;
      }

      .tip-icon {
        font-size: 24px;
        margin-bottom: 10px;
      }

      /* 常见问题 */
      .faq-section {
        padding: 80px 0;
      }

      .faq-container {
        max-width: 800px;
        margin: 0 auto;
      }

      .faq-item {
        margin-bottom: 20px;
        border: 1px solid #e5e7eb;
        border-radius: 8px;
        overflow: hidden;
        background: #ffffff;
      }

      .faq-question {
        padding: 20px;
        background-color: #f3f4f6;
        cursor: pointer;
        font-weight: 600;
        display: flex;
        justify-content: space-between;
        align-items: center;
        transition: all 0.3s ease;
      }

      .faq-question:hover {
        background-color: #e5e7eb;
      }

      .faq-toggle {
        font-size: 20px;
        transition: transform 0.3s ease;
      }

      .faq-item.active .faq-toggle {
        transform: rotate(180deg);
      }

      .faq-answer {
        padding: 20px;
        display: none;
        color: #6b7280;
        font-size: 14px;
        line-height: 1.6;
      }

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

      /* 页脚 */
      footer {
        background-color: #1f2937;
        color: #d1d5db;
        padding: 60px 0 20px;
      }

      .footer-content {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        gap: 40px;
        margin-bottom: 40px;
      }

      .footer-section h3 {
        color: #ffffff;
        margin-bottom: 15px;
        font-size: 16px;
      }

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

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

      .footer-section a {
        color: #d1d5db;
        font-size: 14px;
      }

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

      .footer-bottom {
        border-top: 1px solid #374151;
        padding-top: 20px;
        text-align: center;
        font-size: 14px;
        color: #9ca3af;
      }

      /* 响应式设计 */
      @media (max-width: 768px) {
        .hero h1 {
          font-size: 32px;
        }

        .hero p {
          font-size: 16px;
        }

        .nav-links {
          gap: 15px;
          font-size: 12px;
        }

        .section-title {
          font-size: 28px;
        }

        .comparison-table th,
        .comparison-table td {
          padding: 12px;
          font-size: 12px;
        }

        .guide-steps,
        .security-tips {
          grid-template-columns: 1fr;
        }
      }

      /* 平滑滚动 */
      .scroll-smooth {
        scroll-behavior: smooth;
      }

      /* 打字动画 */
      @keyframes fadeInUp {
        from {
          opacity: 0;
          transform: translateY(20px);
        }
        to {
          opacity: 1;
          transform: translateY(0);
        }
      }

      .fade-in {
        animation: fadeInUp 0.6s ease-out;
      }