:root {
      --primary: #1D7BFF;
      --primary-hover: #0052D4;
      --deep-bg: #0B0E11;
      --base-bg: rgb(243,244,246);
      --text-dark: #1E2329;
      --text-gray: #474D57;
      --text-light: #707A8A;
      --silver: #EAECEF;
      --success: #0ECB81;
    }
    * { box-sizing: border-box; margin: 0; padding: 0; }
    body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif; background-color: var(--base-bg); color: var(--text-dark); line-height: 1.6; }
    a { text-decoration: none; color: inherit; transition: 0.3s; }
    
    
    .header { background: var(--deep-bg); color: #ffffff; position: sticky; top: 0; z-index: 1000; border-bottom: 1px solid rgba(255,255,255,0.1); }
    .header-container { display: flex; align-items: center; justify-content: space-between; max-width: 1200px; margin: 0 auto; padding: 15px 20px; }
    .logo { display: inline-flex; align-items: center; gap: 12px; }
    .logo img { display: block; height: 36px; width: auto; max-width: 160px; object-fit: contain; }
    .logo span { font-size: 18px; font-weight: 800; color: #ffffff; }
    .nav-desktop { display: flex; align-items: center; gap: 24px; }
    .nav-desktop a { color: #eaecef; font-size: 15px; font-weight: 500; }
    .nav-desktop a:hover { color: var(--primary); }
    .menu-toggle { display: none; background: none; border: none; cursor: pointer; flex-direction: column; gap: 6px; }
    .menu-toggle span { display: block; width: 25px; height: 2px; background: #ffffff; }
    
    
    .drawer-overlay { display: none; position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0,0,0,0.6); z-index: 2000; }
    .drawer { position: fixed; top: 0; left: -280px; width: 280px; height: 100%; background: var(--deep-bg); z-index: 2001; transition: 0.3s ease; padding: 20px; }
    .drawer.active { left: 0; }
    .drawer-overlay.active { display: block; }
    .drawer-header { display: flex; align-items: center; justify-content: space-between; border-bottom: 1px solid rgba(255,255,255,0.1); padding-bottom: 15px; margin-bottom: 20px; }
    .drawer-close { background: none; border: none; color: #ffffff; font-size: 28px; cursor: pointer; }
    .drawer-nav a { display: block; color: #eaecef; font-size: 16px; padding: 12px 0; border-bottom: 1px solid rgba(255,255,255,0.05); }

    
    .container { max-width: 1100px; margin: 60px auto; padding: 0 20px; }
    .breadcrumb { font-size: 14px; color: var(--text-gray); margin-bottom: 30px; }
    .breadcrumb a { color: var(--primary); }
    .breadcrumb span { margin: 0 8px; }

    
    .download-header { text-align: center; margin-bottom: 60px; }
    .download-header h1 { font-size: 36px; font-weight: 800; color: var(--text-dark); margin-bottom: 15px; }
    .download-header p { font-size: 18px; color: var(--text-gray); }

    
    .download-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 40px; margin-bottom: 60px; }
    .download-card { background: #ffffff; border-radius: 16px; padding: 40px; border: 1px solid var(--silver); display: flex; flex-direction: column; align-items: center; text-align: center; }
    .platform-icon { font-size: 64px; margin-bottom: 20px; }
    .download-card h3 { font-size: 22px; font-weight: 700; margin-bottom: 12px; }
    .download-card p { font-size: 15px; color: var(--text-gray); margin-bottom: 30px; line-height: 1.6; }
    .download-action-btn { background: var(--primary); color: #ffffff; padding: 14px 40px; border-radius: 8px; font-weight: 600; width: 100%; text-align: center; }
    .download-action-btn:hover { background: var(--primary-hover); transform: translateY(-2px); }

    
    .verification-box { background: #ffffff; border-radius: 16px; padding: 40px; border: 1px solid var(--silver); margin-bottom: 40px; }
    .verification-box h2 { font-size: 22px; font-weight: 700; margin-bottom: 20px; color: var(--text-dark); }
    .verification-box p { font-size: 15px; color: var(--text-gray); line-height: 1.7; margin-bottom: 15px; }
    .hash-code { background: var(--base-bg); padding: 15px; border-radius: 8px; font-family: monospace; font-size: 13px; color: var(--text-dark); border: 1px dashed var(--silver); word-break: break-all; }

    
    .steps-section { background: #ffffff; border-radius: 16px; padding: 40px; border: 1px solid var(--silver); }
    .steps-section h2 { font-size: 22px; font-weight: 700; margin-bottom: 30px; }
    .step-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
    .step-item { display: flex; flex-direction: column; gap: 10px; }
    .step-num { font-size: 24px; font-weight: 800; color: var(--primary); }
    .step-title { font-size: 16px; font-weight: 700; }
    .step-desc { font-size: 14px; color: var(--text-gray); }

    
    .footer { background: var(--deep-bg); color: #ffffff; padding: 80px 20px 40px 20px; border-top: 1px solid rgba(255,255,255,0.1); margin-top: 80px; }
    .footer-container { max-width: 1200px; margin: 0 auto; display: grid; grid-template-columns: 1.5fr repeat(3, 1fr); gap: 40px; margin-bottom: 60px; }
    .footer-brand { display: flex; flex-direction: column; gap: 20px; }
    .footer-brand p { color: #8491A5; font-size: 14px; line-height: 1.6; }
    .footer-col h4 { font-size: 16px; font-weight: 700; margin-bottom: 20px; color: #ffffff; }
    .footer-col ul { display: flex; flex-direction: column; gap: 12px; }
    .footer-col a { color: #8491A5; font-size: 14px; }
    .footer-col a:hover { color: var(--primary); padding-left: 5px; }
    .footer-bottom { max-width: 1200px; margin: 0 auto; padding-top: 30px; border-top: 1px solid rgba(255,255,255,0.05); display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 20px; color: #8491A5; font-size: 13px; }

    @media (max-width: 768px) {
      .nav-desktop { display: none; }
      .menu-toggle { display: flex; }
      .download-grid, .step-list { grid-template-columns: 1fr; }
      .footer-container { grid-template-columns: 1fr; }
    }