:root {
      --primary-color: rgb(20,184,166);
      --primary-hover: rgb(13,148,136);
      --bg-dark: #090d16;
      --bg-light: #f8fafc;
      --text-dark: #0f172a;
      --text-light: #64748b;
      --border-color: #e2e8f0;
      --glacier-blue: #1D7BFF;
    }
    * { 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: var(--bg-light); line-height: 1.6; }
    a { text-decoration: none; color: inherit; transition: all 0.3s; }
    
    
    header { background: #fff; border-bottom: 1px solid var(--border-color); position: sticky; top: 0; z-index: 100; box-shadow: 0 1px 3px rgba(0,0,0,0.05); }
    .header-container { max-width: 1200px; margin: 0 auto; display: flex; justify-content: space-between; align-items: center; padding: 15px 20px; }
    .logo { display: inline-flex; align-items: center; gap: 12px; }
    .logo img { display: block; height: 40px; width: auto; max-width: 160px; object-fit: contain; flex-shrink: 0; }
    .logo span { display: inline-block; font-size: 20px; font-weight: 800; line-height: 1; color: var(--text-dark); white-space: nowrap; }
    .nav-menu { display: flex; gap: 24px; align-items: center; }
    .nav-menu a { font-size: 15px; font-weight: 500; color: #475569; padding: 8px 12px; border-radius: 6px; }
    .nav-menu a:hover { color: var(--primary-color); background: #f1f5f9; }
    .menu-toggle { display: none; background: none; border: none; font-size: 24px; cursor: pointer; color: var(--text-dark); }

    
    .drawer-mask { position: fixed; top: 0; left: 0; right: 0; bottom: 0; background: rgba(0,0,0,0.5); z-index: 1000; opacity: 0; pointer-events: none; transition: opacity 0.3s ease; }
    .drawer-mask.active { opacity: 1; pointer-events: auto; }
    .mobile-drawer { position: fixed; top: 0; left: -280px; width: 280px; height: 100%; background: #fff; z-index: 1001; box-shadow: 4px 0 20px rgba(0,0,0,0.15); transition: left 0.3s ease; padding: 24px; display: flex; flex-direction: column; gap: 24px; }
    .mobile-drawer.active { left: 0; }
    .drawer-header { display: flex; justify-content: space-between; align-items: center; }
    .drawer-close { background: none; border: none; font-size: 24px; cursor: pointer; }
    .drawer-nav { display: flex; flex-direction: column; gap: 16px; }
    .drawer-nav a { font-size: 16px; font-weight: 500; padding: 10px; border-radius: 6px; }
    .drawer-nav a:hover { background: #f1f5f9; color: var(--primary-color); }

    
    .page-banner { background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%); color: #fff; padding: 60px 20px; text-align: center; }
    .page-banner h1 { font-size: 32px; font-weight: 800; margin-bottom: 12px; }
    .page-banner p { font-size: 16px; color: #94a3b8; max-width: 600px; margin: 0 auto; }

    
    .download-container { max-width: 1000px; margin: 60px auto; padding: 0 20px; }
    
    
    .download-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 40px; margin-bottom: 60px; }
    .download-card { background: #fff; border: 1px solid var(--border-color); border-radius: 16px; padding: 40px; text-align: center; transition: all 0.3s; }
    .download-card:hover { transform: translateY(-5px); box-shadow: 0 12px 24px rgba(0,0,0,0.05); border-color: var(--primary-color); }
    .download-icon { font-size: 48px; margin-bottom: 20px; }
    .download-card h2 { font-size: 22px; font-weight: 700; margin-bottom: 12px; }
    .download-card p { font-size: 14px; color: var(--text-light); margin-bottom: 24px; line-height: 1.6; }
    .download-btn { display: inline-block; width: 100%; max-width: 220px; background: var(--primary-color); color: #fff; padding: 12px 24px; border-radius: 8px; font-weight: 600; text-align: center; }
    .download-btn:hover { background: var(--primary-hover); }
    .download-btn.secondary { background: #334155; }
    .download-btn.secondary:hover { background: #1e293b; }
    .qr-placeholder { width: 140px; height: 140px; margin: 24px auto 0; background: #f1f5f9; border: 1px dashed var(--border-color); display: flex; align-items: center; justify-content: center; font-size: 12px; color: var(--text-light); }

    
    .guide-card { background: #fff; border: 1px solid var(--border-color); border-radius: 16px; padding: 40px; }
    .guide-card h3 { font-size: 20px; font-weight: 700; margin-bottom: 24px; border-left: 4px solid var(--primary-color); padding-left: 12px; }
    .steps { display: flex; flex-direction: column; gap: 20px; }
    .step-item { display: flex; gap: 20px; align-items: flex-start; }
    .step-num { width: 32px; height: 32px; background: rgba(20,184,166,0.1); color: var(--primary-color); font-weight: 700; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
    .step-text h4 { font-size: 16px; font-weight: 600; margin-bottom: 4px; }
    .step-text p { font-size: 14px; color: var(--text-light); }

    
    footer { background: #0f172a; color: #94a3b8; padding: 60px 20px 30px; border-top: 1px solid #1e293b; }
    .footer-container { max-width: 1200px; margin: 0 auto; display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
    .footer-brand { display: flex; flex-direction: column; gap: 16px; }
    .footer-brand .logo span { color: #fff; }
    .footer-title { color: #f8fafc; font-size: 16px; font-weight: 600; margin-bottom: 20px; }
    .footer-links { list-style: none; display: flex; flex-direction: column; gap: 12px; }
    .footer-links a { font-size: 14px; }
    .footer-links a:hover { color: var(--primary-color); }
    .footer-bottom { max-width: 1200px; margin: 0 auto; padding-top: 30px; border-top: 1px solid #1e293b; display: flex; justify-content: space-between; align-items: center; font-size: 14px; }

    @media (max-width: 768px) {
      .nav-menu { display: none; }
      .menu-toggle { display: block; }
      .download-grid { grid-template-columns: 1fr; }
      .footer-container { grid-template-columns: 1fr; }
      .footer-bottom { flex-direction: column; gap: 16px; text-align: center; }
    }