:root {
      --primary: rgb(126, 34, 206);
      --primary-hover: rgb(109, 28, 182);
      --tech-blue: #1D7BFF;
      --tech-cyan: #00EBFF;
      --dark-bg: #0A0F1D;
      --silver: #E2E8F0;
      --light-bg: #F8FAFC;
      --text-dark: #0F172A;
      --text-light: #64748B;
      --border: #E2E8F0;
      --glass-border: rgba(255, 255, 255, 0.08);
    }
    * { box-sizing: border-box; margin: 0; padding: 0; }
    body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif; color: var(--text-dark); background-color: #fff; line-height: 1.5; }
    a { color: inherit; text-decoration: none; transition: all 0.3s ease; }
    img { max-width: 100%; height: auto; }
    
    
    .header { background: var(--dark-bg); border-bottom: 1px solid var(--glass-border); position: sticky; top: 0; z-index: 100; transition: all 0.3s; }
    .header-container { max-width: 1200px; margin: 0 auto; padding: 15px 20px; display: flex; justify-content: space-between; align-items: center; }
    .logo { display: inline-flex; align-items: center; gap: 12px; text-decoration: none; }
    .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: #fff; white-space: nowrap; letter-spacing: 0.5px; }
    .nav-menu { display: flex; align-items: center; gap: 30px; }
    .nav-menu a { color: var(--silver); font-weight: 500; font-size: 15px; }
    .nav-menu a:hover { color: var(--tech-cyan); }
    .menu-btn { display: none; background: none; border: none; color: #fff; cursor: pointer; padding: 5px; }
    .menu-btn svg { width: 24px; height: 24px; fill: currentColor; }

    
    .drawer-overlay { position: fixed; top: 0; left: 0; width: 100vw; height: 100vh; background: rgba(0,0,0,0.6); z-index: 998; opacity: 0; pointer-events: none; transition: opacity 0.3s ease; backdrop-filter: blur(4px); }
    .drawer { position: fixed; top: 0; left: -300px; width: 300px; height: 100vh; background: var(--dark-bg); z-index: 999; padding: 30px 20px; display: flex; flex-direction: column; gap: 30px; transition: left 0.3s cubic-bezier(0.4, 0, 0.2, 1); border-right: 1px solid var(--glass-border); }
    .drawer.active { left: 0; }
    .drawer-overlay.active { opacity: 1; pointer-events: auto; }
    .drawer-header { display: flex; justify-content: space-between; align-items: center; }
    .drawer-close { background: none; border: none; color: #fff; cursor: pointer; }
    .drawer-close svg { width: 24px; height: 24px; fill: currentColor; }
    .drawer-menu { display: flex; flex-direction: column; gap: 20px; }
    .drawer-menu a { color: var(--silver); font-size: 16px; font-weight: 500; padding: 10px 0; border-bottom: 1px solid rgba(255,255,255,0.05); }
    .drawer-menu a:hover { color: var(--tech-cyan); }

    
    .page-banner { background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%); color: #fff; padding: 60px 20px; text-align: center; }
    .breadcrumb { display: flex; justify-content: center; gap: 10px; font-size: 14px; color: var(--silver); margin-bottom: 15px; }
    .breadcrumb a:hover { color: var(--tech-cyan); }
    .page-banner h1 { font-size: 32px; font-weight: 800; }

    
    .section { padding: 80px 20px; background: var(--light-bg); }
    .container { max-width: 1100px; margin: 0 auto; }
    
    .download-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 30px; margin-bottom: 60px; }
    .download-card { background: #fff; border: 1px solid var(--border); border-radius: 16px; padding: 40px 30px; text-align: center; transition: all 0.3s; display: flex; flex-direction: column; align-items: center; justify-content: space-between; }
    .download-card:hover { transform: translateY(-5px); box-shadow: 0 20px 40px rgba(0,0,0,0.05); border-color: var(--primary); }
    .platform-icon { font-size: 48px; margin-bottom: 20px; }
    .platform-name { font-size: 20px; font-weight: 800; color: var(--text-dark); margin-bottom: 8px; }
    .platform-ver { font-size: 13px; color: var(--text-light); margin-bottom: 25px; }
    .download-btn { display: inline-flex; align-items: center; justify-content: center; width: 100%; padding: 12px 24px; font-size: 14px; font-weight: 700; border-radius: 8px; transition: all 0.3s; background: var(--primary); color: #fff; }
    .download-btn:hover { background: var(--primary-hover); }

    
    .guide-section { padding: 80px 20px; background: #fff; }
    .guide-title { text-align: center; margin-bottom: 50px; }
    .guide-title h2 { font-size: 28px; font-weight: 800; color: var(--text-dark); }
    
    .steps-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 40px; }
    .step-card { display: flex; gap: 20px; }
    .step-num { width: 44px; height: 44px; background: rgba(126, 34, 206, 0.1); color: var(--primary); font-size: 18px; font-weight: 800; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
    .step-info h3 { font-size: 18px; font-weight: 700; color: var(--text-dark); margin-bottom: 8px; }
    .step-info p { font-size: 14px; color: var(--text-light); line-height: 1.6; }

    
    .footer { background: #0F172A; color: var(--silver); padding: 80px 20px 40px; border-top: 1px solid rgba(255,255,255,0.05); }
    .footer-grid { max-width: 1200px; margin: 0 auto; display: grid; grid-template-columns: 2fr repeat(3, 1fr); gap: 50px; margin-bottom: 60px; }
    .footer-brand .logo { margin-bottom: 20px; }
    .footer-brand .logo span { color: #fff; }
    .footer-brand p { font-size: 14px; color: #94A3B8; line-height: 1.6; margin-bottom: 20px; }
    .footer-title { font-size: 16px; font-weight: 700; color: #fff; margin-bottom: 24px; position: relative; padding-bottom: 8px; }
    .footer-title::after { content: ''; position: absolute; left: 0; bottom: 0; width: 30px; height: 2px; background: var(--primary); }
    .footer-links { list-style: none; display: flex; flex-direction: column; gap: 12px; }
    .footer-links a { font-size: 14px; color: #94A3B8; }
    .footer-links a:hover { color: #fff; padding-left: 5px; }
    .footer-contact { font-size: 14px; color: #94A3B8; display: flex; flex-direction: column; gap: 10px; }
    .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; font-size: 13px; color: #64748B; }
    .footer-bottom-links { display: flex; gap: 20px; }
    .footer-bottom-links a:hover { color: #fff; }

    @media (max-width: 768px) {
      .nav-menu { display: none; }
      .menu-btn { display: block; }
      .footer-grid { grid-template-columns: 1fr; gap: 40px; }
    }