:root {
      --primary: #1D7BFF;
      --primary-light: #00F2FE;
      --primary-gradient: linear-gradient(135deg, #1D7BFF 0%, #00F2FE 100%);
      --bg-dark: #0A0E1A;
      --bg-dark-card: #141B2D;
      --bg-light: rgb(223,230,233);
      --bg-white: #FFFFFF;
      --text-dark: #0F172A;
      --text-muted: #64748B;
      --text-light: #F8FAFC;
      --text-light-muted: #94A3B8;
      --border-color: rgba(29, 123, 255, 0.15);
      --border-dark: rgba(255, 255, 255, 0.08);
      --shadow-sm: 0 2px 8px rgba(0,0,0,0.05);
      --shadow-md: 0 10px 30px rgba(29, 123, 255, 0.1);
      --shadow-lg: 0 20px 40px rgba(0,0,0,0.15);
      --radius: 12px;
      --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

    * { box-sizing: border-box; margin: 0; padding: 0; }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
      color: var(--text-dark);
      background-color: var(--bg-light);
      line-height: 1.6;
      overflow-x: hidden;
    }
    a { text-decoration: none; color: inherit; transition: var(--transition); }
    img { max-width: 100%; height: auto; }
    ul { list-style: none; }

    .container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 24px; }
    
    
    .header { position: fixed; top: 0; left: 0; width: 100%; z-index: 1000; background: rgba(10, 14, 26, 0.85); backdrop-filter: blur(12px); border-bottom: 1px solid var(--border-dark); transition: var(--transition); }
    .header-container { display: flex; align-items: center; justify-content: space-between; height: 72px; }
    .logo { display: inline-flex; align-items: center; gap: 12px; text-decoration: none; }
    .logo img { display: block; height: 38px; width: auto; max-width: 160px; object-fit: contain; flex-shrink: 0; }
    .logo span { display: inline-block; font-size: 18px; font-weight: 800; line-height: 1; color: var(--text-light); white-space: nowrap; }
    .nav-menu { display: flex; align-items: center; gap: 32px; }
    .nav-link { font-size: 15px; font-weight: 500; color: var(--text-light-muted); }
    .nav-link:hover { color: var(--primary-light); }
    .nav-btn { padding: 8px 20px; font-size: 14px; display: inline-flex; align-items: center; justify-content: center; border-radius: var(--radius); font-weight: 600; cursor: pointer; border: none; background: var(--primary-gradient); color: var(--text-light); }
    .menu-toggle { display: none; background: none; border: none; color: var(--text-light); cursor: pointer; font-size: 24px; }

    .drawer { position: fixed; top: 0; left: -280px; width: 280px; height: 100vh; background: var(--bg-dark); z-index: 1100; padding: 30px 24px; box-shadow: var(--shadow-lg); transition: var(--transition); display: flex; flex-direction: column; gap: 40px; }
    .drawer.open { left: 0; }
    .drawer-overlay { position: fixed; top: 0; left: 0; width: 100vw; height: 100vh; background: rgba(0,0,0,0.6); backdrop-filter: blur(4px); z-index: 1050; opacity: 0; visibility: hidden; transition: var(--transition); }
    .drawer-overlay.show { opacity: 1; visibility: visible; }
    .drawer-header { display: flex; align-items: center; justify-content: space-between; }
    .drawer-close { background: none; border: none; color: var(--text-light-muted); font-size: 24px; cursor: pointer; }
    .drawer-nav { display: flex; flex-direction: column; gap: 20px; }
    .drawer-nav-link { font-size: 16px; font-weight: 500; color: var(--text-light-muted); }
    .drawer-nav-link:hover { color: var(--primary-light); }

    
    .page-banner {
      background: var(--bg-dark);
      background-image: radial-gradient(circle at center, rgba(29, 123, 255, 0.15) 0%, rgba(10, 14, 26, 0) 70%);
      padding: 130px 0 60px 0;
      color: var(--text-light);
      text-align: center;
    }
    .breadcrumbs {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      font-size: 14px;
      color: var(--text-light-muted);
      margin-bottom: 16px;
    }
    .breadcrumbs a:hover { color: var(--primary-light); }
    .page-title { font-size: 36px; font-weight: 800; letter-spacing: -0.5px; }

    
    .download-section { padding: 80px 0; background: var(--bg-white); }
    .download-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; margin-bottom: 50px; }
    .download-card {
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 40px 30px;
      text-align: center;
      background: var(--bg-light);
      transition: var(--transition);
    }
    .download-card:hover {
      transform: translateY(-6px);
      background: var(--bg-white);
      box-shadow: var(--shadow-md);
      border-color: var(--primary);
    }
    .download-icon { font-size: 48px; margin-bottom: 24px; }
    .download-card h3 { font-size: 20px; font-weight: 700; color: var(--text-dark); margin-bottom: 12px; }
    .download-card p { font-size: 14px; color: var(--text-muted); margin-bottom: 28px; line-height: 1.6; }
    
    .btn-download {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 100%;
      padding: 12px 24px;
      background: var(--primary-gradient);
      color: var(--text-light);
      border-radius: var(--radius);
      font-weight: 600;
      font-size: 14px;
      transition: var(--transition);
    }
    .btn-download:hover { transform: translateY(-2px); box-shadow: var(--shadow-sm); }

    
    .guide-section { padding: 80px 0; }
    .guide-step {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 30px;
      display: flex;
      gap: 24px;
      margin-bottom: 24px;
      align-items: center;
    }
    .guide-num {
      width: 50px;
      height: 50px;
      border-radius: 50%;
      background: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      font-weight: 800;
      flex-shrink: 0;
    }
    .guide-info h4 { font-size: 18px; font-weight: 700; color: var(--text-dark); margin-bottom: 8px; }
    .guide-info p { font-size: 14px; color: var(--text-muted); line-height: 1.6; }

    
    .footer { background: #070911; color: var(--text-light-muted); padding: 80px 0 40px 0; border-top: 1px solid var(--border-dark); font-size: 14px; }
    .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.5fr; gap: 50px; margin-bottom: 60px; }
    .footer-brand { display: flex; flex-direction: column; gap: 20px; }
    .footer-logo { display: inline-flex; align-items: center; gap: 12px; }
    .footer-logo img { height: 38px; }
    .footer-logo span { font-size: 18px; font-weight: 800; color: var(--text-light); margin-bottom: 0; }
    .footer-desc { line-height: 1.6; color: var(--text-light-muted); }
    .footer-title { font-size: 15px; font-weight: 700; color: var(--text-light); margin-bottom: 20px; text-transform: uppercase; letter-spacing: 0.5px; }
    .footer-links { display: flex; flex-direction: column; gap: 12px; }
    .footer-link:hover { color: var(--primary-light); }
    .footer-bottom { border-top: 1px solid var(--border-dark); padding-top: 30px; display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 20px; }
    .footer-meta { display: flex; gap: 24px; }
    .footer-risk-text { font-size: 12px; line-height: 1.8; color: rgba(255, 255, 255, 0.35); margin-top: 30px; border-top: 1px solid var(--border-dark); padding-top: 20px; }

    @media (max-width: 1024px) {
      .download-grid { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 768px) {
      .nav-menu { display: none; }
      .menu-toggle { display: block; }
      .download-grid { grid-template-columns: 1fr; }
      .guide-step { flex-direction: column; text-align: center; }
      .footer-grid { grid-template-columns: 1fr; gap: 30px; }
      .footer-bottom { flex-direction: column; text-align: center; }
    }