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

    body {
      background: #f8fafc;
      font-family: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
      color: #0b1e33;
      line-height: 1.5;
      -webkit-font-smoothing: antialiased;
    }

    .wrapper {
      max-width: 1280px;
      margin: 0 auto;
      padding: 1.8rem 1.8rem 2.8rem;
    }

    /* 导航栏 —— 与首页一致，但更简洁 */
    .navbar {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 1rem;
      margin-bottom: 2.8rem;
    }

    .logo {
      display: flex;
      align-items: center;
      gap: 0.5rem;
      font-weight: 700;
      font-size: 1.5rem;
      color: #0f172a;
    }

    .logo-icon {
      font-size: 2rem;
    }

    .nav-links {
      display: flex;
      gap: 2rem;
      font-weight: 500;
    }

    .nav-links a {
      text-decoration: none;
      color: #1e293b;
      transition: color 0.15s;
    }

    .nav-links a:hover {
      color: #2563eb;
    }

    .nav-cta {
      background: #0f172a;
      color: white !important;
      padding: 0.5rem 1.4rem;
      border-radius: 60px;
      font-weight: 600;
    }

    /* 下载页头部 —— 创意简洁 */
    .download-header {
      text-align: center;
      margin-bottom: 3rem;
    }

    .download-header h1 {
      font-size: 3.5rem;
      font-weight: 800;
      letter-spacing: -0.02em;
      margin-bottom: 1rem;
      color: #0a1424;
    }

    .header-highlight {
      background: linear-gradient(145deg, #2563eb, #1e40af);
      background-clip: text;
      -webkit-background-clip: text;
      color: transparent;
    }

    .subhead {
      font-size: 1.2rem;
      color: #334155;
      max-width: 700px;
      margin: 0 auto 1.2rem;
    }

    .version-badge {
      display: inline-flex;
      align-items: center;
      gap: 0.5rem;
      background: #eef2ff;
      padding: 0.4rem 1.2rem;
      border-radius: 60px;
      font-weight: 500;
      color: #1e40af;
    }

    /* 下载卡片网格 —— 核心资源区 */
    .download-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 2rem;
      margin: 2.5rem 0 3.5rem;
    }

    .dl-card {
      background: white;
      border-radius: 32px;
      padding: 2rem 1.8rem 2rem;
      box-shadow: 0 20px 35px -10px rgba(0,0,0,0.05);
      border: 1px solid #eef2f6;
      transition: transform 0.2s, box-shadow 0.2s;
      display: flex;
      flex-direction: column;
    }

    .dl-card:hover {
      transform: translateY(-6px);
      box-shadow: 0 30px 45px -12px rgba(37,99,235,0.12);
      border-color: #cbdffc;
    }

    .card-icon {
      font-size: 2.8rem;
      margin-bottom: 1.2rem;
    }

    .dl-card h3 {
      font-size: 1.8rem;
      font-weight: 700;
      margin-bottom: 0.3rem;
    }

    .platform-tag {
      color: #64748b;
      margin-bottom: 1.5rem;
      font-size: 0.9rem;
    }

    .file-meta {
      background: #f1f5f9;
      border-radius: 20px;
      padding: 0.8rem 1rem;
      margin: 1rem 0 1.2rem;
      display: flex;
      justify-content: space-between;
      font-size: 0.9rem;
    }

    .btn-download {
      background: #0f172a;
      color: white;
      border: none;
      border-radius: 60px;
      padding: 1rem 1.5rem;
      font-weight: 600;
      font-size: 1.1rem;
      text-decoration: none;
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      transition: 0.2s;
      margin-top: auto;
      cursor: pointer;
      border: 1px solid #0f172a;
    }

    .btn-download:hover {
      background: #1e293b;
      transform: scale(1.02);
    }

    .btn-outline-light {
      background: transparent;
      color: #0f172a;
      border: 1.5px solid #cbd5e1;
      margin-top: 0.8rem;
    }

    .btn-outline-light:hover {
      background: #f1f5f9;
      border-color: #94a3b8;
      transform: scale(1.01);
    }

    .extra-links {
      display: flex;
      gap: 0.8rem;
      justify-content: center;
      margin-top: 0.8rem;
      font-size: 0.9rem;
    }

    /* 安装指引 —— 创意三步 */
    .install-guide {
      background: linear-gradient(145deg, #ffffff, #f9fcff);
      border-radius: 40px;
      padding: 2.5rem 2.5rem;
      margin: 2.5rem 0;
      border: 1px solid #e2edf7;
    }

    .guide-title {
      font-size: 2rem;
      font-weight: 700;
      margin-bottom: 2rem;
      display: flex;
      align-items: center;
      gap: 0.8rem;
    }

    .steps {
      display: flex;
      flex-wrap: wrap;
      gap: 2rem;
      justify-content: space-between;
    }

    .step-item {
      flex: 1;
      min-width: 160px;
    }

    .step-num {
      background: #0f172a;
      color: white;
      width: 40px;
      height: 40px;
      border-radius: 30px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      margin-bottom: 1rem;
    }

    /* 信任条 */
    .trust-mini {
      display: flex;
      flex-wrap: wrap;
      gap: 2rem;
      justify-content: space-around;
      background: white;
      border-radius: 28px;
      padding: 1.5rem 2rem;
      margin: 2rem 0;
      border: 1px solid #eef2f6;
    }

    .footer {
      margin-top: 3rem;
      text-align: center;
      color: #64748b;
      font-size: 0.9rem;
    }

    /* 响应式 */
    @media (max-width: 800px) {
      .download-grid {
        grid-template-columns: 1fr;
      }
      .download-header h1 {
        font-size: 2.5rem;
      }
      .navbar {
        flex-direction: column;
        align-items: stretch;
      }
      .nav-links {
        justify-content: space-around;
      }
    }

    .glowing-dot {
      display: inline-block;
      width: 10px;
      height: 10px;
      background: #10b981;
      border-radius: 50%;
      margin-right: 6px;
      box-shadow: 0 0 0 2px #10b98133;
    }

    .fingerprint-tag {
      background: #e9f0ff;
      border-radius: 20px;
      padding: 0.2rem 0.8rem;
      font-size: 0.8rem;
      color: #2563eb;
    }