:root {
      --primary: #1D7BFF;
      --accent: rgb(225,112,85);
      --dark: #0B132B;
      --light: #F4F7FC;
      --white: #ffffff;
      --text: #2D3748;
      --text-muted: #718096;
      --transition: all 0.3s ease;
    }
    * { box-sizing: border-box; margin: 0; padding: 0; }
    body { font-family: -apple-system, BlinkMacSystemFont, sans-serif; background: var(--light); color: var(--text); line-height: 1.6; }
    a { text-decoration: none; color: inherit; transition: var(--transition); }
    img { max-width: 100%; height: auto; display: block; }
    .container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

    
    header { background: rgba(11, 19, 43, 0.95); backdrop-filter: blur(10px); border-bottom: 1px solid rgba(255,255,255,0.1); position: fixed; width: 100%; top: 0; z-index: 1000; }
    .header-inner { display: flex; align-items: center; justify-content: space-between; height: 72px; }
    .logo { display: inline-flex; align-items: center; gap: 12px; }
    .logo img { display: block; height: 40px; width: auto; max-width: 160px; object-fit: contain; }
    .logo span { font-size: 20px; font-weight: 800; color: var(--white); }
    .nav-desktop { display: flex; align-items: center; gap: 32px; }
    .nav-desktop a { color: rgba(255,255,255,0.8); font-size: 15px; font-weight: 500; padding: 6px 0; }
    .nav-desktop a:hover { color: var(--primary); }
    .menu-toggle { display: none; background: none; border: none; color: var(--white); cursor: pointer; }

    
    .drawer-overlay { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0,0,0,0.6); z-index: 2000; opacity: 0; pointer-events: none; transition: var(--transition); backdrop-filter: blur(4px); }
    .drawer { position: fixed; top: 0; left: -320px; width: 320px; height: 100%; background: var(--dark); color: var(--white); z-index: 2001; transition: var(--transition); display: flex; flex-direction: column; padding: 24px; }
    .drawer-overlay.active { opacity: 1; pointer-events: auto; }
    .drawer.active { left: 0; }
    .drawer-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 40px; }
    .drawer-close svg { width: 24px; height: 24px; }
    .drawer-nav { display: flex; flex-direction: column; gap: 20px; }
    .drawer-nav a { font-size: 18px; font-weight: 500; color: rgba(255,255,255,0.8); }

    
    .inner-banner { background: radial-gradient(circle at 50% 30%, rgba(29, 123, 255, 0.15) 0%, rgba(11, 19, 43, 0) 70%), var(--dark); color: var(--white); padding: 140px 0 60px; text-align: center; }

    
    .download-section { padding: 80px 0; background: var(--white); }
    .download-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
    .download-info h2 { font-size: 32px; font-weight: 800; color: var(--dark); margin-bottom: 16px; }
    .download-info p { color: var(--text-muted); margin-bottom: 32px; font-size: 16px; }
    
    .download-buttons { display: flex; flex-direction: column; gap: 16px; max-width: 400px; }
    .download-btn { display: flex; align-items: center; gap: 16px; background: var(--dark); color: var(--white); padding: 16px 24px; border-radius: 12px; transition: var(--transition); }
    .download-btn:hover { background: var(--primary); transform: translateY(-3px); }
    .download-btn-icon { font-size: 28px; }
    .download-btn-text h4 { font-size: 16px; font-weight: 700; }
    .download-btn-text p { font-size: 12px; opacity: 0.8; margin-bottom: 0; }

    .qrcode-box { display: flex; align-items: center; gap: 24px; margin-top: 40px; padding: 20px; border-radius: 12px; background: var(--light); border: 1px solid rgba(0,0,0,0.05); }
    .qrcode-img { width: 120px; height: 120px; background: #ddd; border-radius: 8px; display: flex; align-items: center; justify-content: center; font-size: 12px; color: var(--text-muted); font-weight: bold; text-align: center; border: 2px solid var(--white); }
    .qrcode-text h3 { font-size: 18px; font-weight: 700; color: var(--dark); margin-bottom: 4px; }
    .qrcode-text p { font-size: 13px; color: var(--text-muted); margin-bottom: 0; }

    
    .guide-section { padding: 100px 0; background: var(--light); }
    .guide-steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; margin-top: 50px; }
    .guide-card { background: var(--white); padding: 40px; border-radius: 16px; position: relative; border: 1px solid rgba(0,0,0,0.03); }
    .step-num { position: absolute; top: -20px; left: 40px; width: 44px; height: 44px; border-radius: 50%; background: var(--primary); color: var(--white); font-weight: 800; display: flex; align-items: center; justify-content: center; font-size: 18px; box-shadow: 0 8px 16px rgba(29, 123, 255, 0.3); }
    .guide-card h3 { font-size: 20px; font-weight: 700; color: var(--dark); margin: 16px 0 12px; }
    .guide-card p { color: var(--text-muted); font-size: 14px; }

    
    footer { background: var(--dark); color: rgba(255,255,255,0.6); padding: 80px 0 40px; font-size: 14px; }
    .footer-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 40px; margin-bottom: 60px; }
    .footer-col h4 { color: var(--white); font-size: 16px; font-weight: 700; margin-bottom: 24px; position: relative; padding-bottom: 8px; }
    .footer-col h4::after { content: ''; position: absolute; left: 0; bottom: 0; width: 30px; height: 2px; background: var(--primary); }
    .footer-col ul { list-style: none; }
    .footer-col ul li { margin-bottom: 12px; }
    .footer-col ul li a:hover { color: var(--primary); padding-left: 4px; }
    .footer-logo-area { display: flex; flex-direction: column; gap: 16px; }
    .footer-bottom { border-top: 1px solid rgba(255,255,255,0.05); padding-top: 40px; text-align: center; display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 20px; }
    .footer-bottom-links { display: flex; gap: 24px; }

    
    @media (max-width: 992px) {
      .download-grid { grid-template-columns: 1fr; gap: 40px; }
      .guide-steps { grid-template-columns: 1fr; gap: 40px; }
    }
    @media (max-width: 768px) {
      .nav-desktop { display: none; }
      .menu-toggle { display: block; }
      .footer-grid { grid-template-columns: 1fr; }
    }