:root {
      --primary: rgb(126,34,206);
      --primary-hover: rgb(109,26,184);
      --primary-light: rgba(126,34,206,0.1);
      --text-main: #334155;
      --text-dark: #0F172A;
      --text-light: #64748B;
      --border-color: #E2E8F0;
      --max-width: 1200px;
    }
    * { 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-main); background: #FAFAFC; line-height: 1.6; }
    a { text-decoration: none; color: inherit; transition: all 0.3s ease; }
    ul { list-style: none; }
    img { max-width: 100%; height: auto; }

    
    .header { background: #FFFFFF; border-bottom: 1px solid var(--border-color); position: sticky; top: 0; z-index: 1000; box-shadow: 0 2px 10px rgba(0,0,0,0.02); }
    .header-container { max-width: var(--max-width); margin: 0 auto; padding: 0 20px; height: 72px; display: flex; align-items: center; justify-content: space-between; }
    .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: 18px; font-weight: 800; line-height: 1; color: var(--text-dark); white-space: nowrap; }
    .nav-desktop { display: flex; align-items: center; gap: 32px; }
    .nav-desktop a { font-size: 15px; font-weight: 500; color: var(--text-main); padding: 8px 0; border-bottom: 2px solid transparent; }
    .nav-desktop a:hover { color: var(--primary); border-bottom-color: var(--primary); }
    .nav-btn { background: var(--primary); color: #FFFFFF !important; padding: 10px 20px !important; border-radius: 6px; border-bottom: none !important; }
    .nav-btn:hover { background: var(--primary-hover); transform: translateY(-1px); }
    .menu-toggle { display: none; background: none; border: none; font-size: 24px; cursor: pointer; color: var(--text-dark); }

    
    .drawer-overlay { position: fixed; top: 0; left: 0; right: 0; bottom: 0; background: rgba(0,0,0,0.5); z-index: 2000; display: none; opacity: 0; transition: opacity 0.3s ease; }
    .drawer { position: fixed; top: 0; left: -280px; bottom: 0; width: 280px; background: #FFFFFF; z-index: 2001; box-shadow: 4px 0 20px rgba(0,0,0,0.1); padding: 24px; display: flex; flex-direction: column; gap: 32px; transition: left 0.3s ease; }
    .drawer.active { left: 0; }
    .drawer-overlay.active { display: block; opacity: 1; }
    .drawer-header { display: flex; align-items: center; justify-content: space-between; }
    .drawer-close { background: none; border: none; font-size: 24px; cursor: pointer; color: var(--text-light); }
    .drawer-nav { display: flex; flex-direction: column; gap: 20px; }
    .drawer-nav a { font-size: 16px; font-weight: 500; color: var(--text-dark); padding: 10px 0; border-bottom: 1px solid var(--border-color); }
    .drawer-nav a:hover { color: var(--primary); }

    
    .container { max-width: 900px; margin: 40px auto; padding: 0 20px; }
    .download-header { text-align: center; margin-bottom: 48px; }
    .download-title { font-size: 32px; font-weight: 800; color: var(--text-dark); margin-bottom: 16px; }
    .download-subtitle { font-size: 16px; color: var(--text-light); }

    .download-section { background: #FFFFFF; border: 1px solid var(--border-color); border-radius: 12px; padding: 40px; margin-bottom: 30px; }
    .download-title-inner { font-size: 22px; font-weight: 700; color: var(--text-dark); margin-bottom: 24px; display: flex; align-items: center; gap: 10px; }
    .download-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; margin-top: 20px; }
    .download-card-item { border: 1px solid var(--border-color); border-radius: 8px; padding: 24px; background: #FAFAFC; text-align: center; display: flex; flex-direction: column; align-items: center; }
    .download-icon { font-size: 40px; margin-bottom: 16px; }
    .download-card-item h4 { font-size: 18px; font-weight: 700; color: var(--text-dark); margin-bottom: 8px; }
    .download-card-item p { font-size: 14px; color: var(--text-light); margin-bottom: 20px; flex-grow: 1; }
    .download-btn { width: 100%; display: inline-flex; align-items: center; justify-content: center; font-size: 14px; font-weight: 600; padding: 12px 24px; border-radius: 6px; background: var(--primary); color: #FFFFFF; transition: all 0.3s ease; }
    .download-btn:hover { background: var(--primary-hover); transform: translateY(-1px); }

    
    .steps-list { display: flex; flex-direction: column; gap: 24px; margin-top: 20px; }
    .step-item { display: flex; gap: 20px; }
    .step-num { width: 32px; height: 32px; background: var(--primary); color: #FFFFFF; display: flex; align-items: center; justify-content: center; border-radius: 50%; font-weight: 700; font-size: 14px; flex-shrink: 0; }
    .step-content h4 { font-size: 16px; font-weight: 700; color: var(--text-dark); margin-bottom: 6px; }
    .step-content p { font-size: 14px; color: var(--text-light); line-height: 1.6; }

    
    .footer { background: #0F172A; color: #94A3B8; padding: 60px 20px 30px; border-top: 1px solid rgba(255,255,255,0.05); }
    .footer-container { max-width: var(--max-width); margin: 0 auto; display: grid; grid-template-columns: 2fr repeat(3, 1fr); gap: 40px; margin-bottom: 48px; }
    .footer-brand .logo span { color: #FFFFFF; }
    .footer-brand p { margin-top: 16px; font-size: 14px; line-height: 1.6; }
    .footer-column h3 { font-size: 16px; font-weight: 600; color: #FFFFFF; margin-bottom: 20px; }
    .footer-column ul { display: flex; flex-direction: column; gap: 12px; }
    .footer-column a { font-size: 14px; color: #94A3B8; }
    .footer-column a:hover { color: #FFFFFF; }
    .footer-bottom { max-width: var(--max-width); margin: 0 auto; border-top: 1px solid rgba(255,255,255,0.1); padding-top: 30px; display: flex; align-items: center; justify-content: space-between; font-size: 13px; }

    @media (max-width: 968px) {
      .nav-desktop { display: none; }
      .menu-toggle { display: block; }
      .footer-container { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 768px) {
      .download-grid { grid-template-columns: 1fr; }
      .footer-container { grid-template-columns: 1fr; }
      .footer-bottom { flex-direction: column; gap: 16px; text-align: center; }
    }