:root {
      --primary: rgb(249,115,22);
      --primary-hover: rgb(234,88,12);
      --primary-light: rgb(254,243,199);
      --dark: #0f172a;
      --slate-700: #334155;
      --slate-100: #f1f5f9;
      --white: #ffffff;
      --shadow: 0 10px 30px -10px rgba(249,115,22, 0.15);
      --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    * { margin: 0; padding: 0; box-sizing: border-box; }
    body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif; color: var(--slate-700); background-color: #f8fafc; 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 20px; }
    
    
    .site-header { background: var(--white); box-shadow: 0 2px 10px rgba(0,0,0,0.03); position: sticky; top: 0; z-index: 100; height: 72px; display: flex; align-items: center; }
    .header-container { display: flex; justify-content: space-between; align-items: center; width: 100%; }
    
    .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: var(--dark); white-space: nowrap; letter-spacing: -0.5px; }
    
    .desktop-nav { display: flex; gap: 32px; align-items: center; }
    .desktop-nav a { font-size: 15px; font-weight: 600; color: var(--slate-700); position: relative; padding: 8px 0; }
    .desktop-nav a:hover, .desktop-nav a.active { color: var(--primary); }
    .desktop-nav a::after { content: ''; position: absolute; bottom: 0; left: 0; width: 0; height: 2px; background: var(--primary); transition: var(--transition); }
    .desktop-nav a:hover::after, .desktop-nav a.active::after { width: 100%; }
    
    .menu-btn { display: none; background: none; border: none; cursor: pointer; flex-direction: column; gap: 6px; z-index: 110; padding: 4px; }
    .menu-btn span { width: 24px; height: 2px; background: var(--dark); transition: var(--transition); transform-origin: center; }
    
    
    .overlay { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(15, 23, 42, 0.6); backdrop-filter: blur(4px); opacity: 0; visibility: hidden; z-index: 105; transition: var(--transition); }
    .overlay.active { opacity: 1; visibility: visible; }
    .drawer { position: fixed; top: 0; left: -320px; width: 300px; height: 100%; background: var(--white); z-index: 109; box-shadow: 10px 0 30px rgba(0,0,0,0.1); transition: var(--transition); display: flex; flex-direction: column; padding: 24px; }
    .drawer.active { left: 0; }
    .drawer-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 40px; }
    .drawer-header .close-btn { background: none; border: none; font-size: 28px; cursor: pointer; color: var(--slate-700); }
    .drawer-nav { display: flex; flex-direction: column; gap: 20px; }
    .drawer-nav a { font-size: 16px; font-weight: 600; padding: 10px 0; border-bottom: 1px solid var(--slate-100); }
    .drawer-nav a:hover { color: var(--primary); padding-left: 8px; }

    
    .page-banner { background: #1e293b; color: var(--white); padding: 50px 0; border-bottom: 4px solid var(--primary); }
    .breadcrumbs { display: flex; gap: 8px; font-size: 14px; color: #94a3b8; margin-bottom: 12px; }
    .breadcrumbs a:hover { color: var(--primary); }
    .banner-title { font-size: 28px; font-weight: 800; }
    
    
    .download-section { padding: 80px 0; background: var(--white); }
    .download-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 40px; }
    .download-card { border: 1px solid var(--slate-100); border-radius: 16px; padding: 40px; text-align: center; background: var(--white); box-shadow: 0 4px 6px -1px rgba(0,0,0,0.01); transition: var(--transition); }
    .download-card:hover { transform: translateY(-5px); box-shadow: var(--shadow); border-color: rgba(249,115,22, 0.2); }
    .platform-icon { font-size: 48px; margin-bottom: 20px; }
    .download-card h3 { font-size: 22px; font-weight: 700; color: var(--dark); margin-bottom: 16px; }
    .download-card p { font-size: 15px; color: var(--slate-700); margin-bottom: 30px; }
    .qr-box { background: var(--slate-100); width: 140px; height: 140px; margin: 0 auto 30px; border-radius: 8px; display: flex; align-items: center; justify-content: center; border: 1px solid var(--slate-100); }
    .qr-box img { width: 120px; height: 120px; }
    .btn-download { width: 100%; max-width: 240px; background: var(--primary); color: var(--white); font-weight: 600; padding: 12px 0; border-radius: 8px; display: inline-flex; align-items: center; justify-content: center; gap: 8px; }
    .btn-download:hover { background: var(--primary-hover); }
    
    
    .guide-section { padding: 80px 0; background: #f8fafc; }
    .guide-steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; margin-top: 40px; }
    .step-card { background: var(--white); padding: 30px; border-radius: 12px; border: 1px solid var(--slate-100); position: relative; }
    .step-num { font-size: 36px; font-weight: 800; color: rgba(249,115,22,0.15); position: absolute; top: 20px; right: 30px; line-height: 1; }
    .step-card h4 { font-size: 18px; font-weight: 700; color: var(--dark); margin-bottom: 12px; }
    .step-card p { font-size: 14px; color: var(--slate-700); line-height: 1.6; }

    
    .site-footer { background: #0f172a; color: #94a3b8; padding: 70px 0 30px; border-top: 1px solid #1e293b; }
    .footer-grid { display: grid; grid-template-columns: 1.5fr repeat(3, 1fr); gap: 40px; margin-bottom: 50px; }
    .footer-brand .logo span { color: var(--white); }
    .footer-brand p { margin-top: 20px; font-size: 14px; line-height: 1.7; }
    .footer-box h4 { font-size: 16px; color: var(--white); font-weight: 700; margin-bottom: 24px; position: relative; padding-bottom: 8px; }
    .footer-box h4::after { content: ''; position: absolute; bottom: 0; left: 0; width: 30px; height: 2px; background: var(--primary); }
    .footer-links { list-style: none; }
    .footer-links li { margin-bottom: 12px; }
    .footer-links a { font-size: 14px; }
    .footer-links a:hover { color: var(--primary); padding-left: 6px; }
    .footer-bottom { border-top: 1px solid #1e293b; padding-top: 30px; display: flex; justify-content: space-between; align-items: center; font-size: 13px; }
    .footer-legal { display: flex; gap: 24px; }
    .footer-legal a:hover { color: var(--white); }

    
    @media (max-width: 992px) {
      .download-grid { grid-template-columns: 1fr; }
      .guide-steps { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 768px) {
      .desktop-nav { display: none; }
      .menu-btn { display: flex; }
      .footer-grid { grid-template-columns: 1fr; }
      .footer-bottom { flex-direction: column; gap: 20px; text-align: center; }
    }