:root {
            --theme-color: rgb(168,85,247);
            --theme-color-dark: rgb(147, 51, 234);
            --theme-color-light: rgba(168,85,247, 0.1);
            --text-color: #333;
            --text-color-light: #666;
            --bg-color: #ffffff;
            --bg-color-alt: #f8f9fa;
            --border-color: #e9ecef;
            --container-width: 1200px;
        }
        body { margin: 0; font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif; font-size: 16px; line-height: 1.6; color: var(--text-color); background-color: var(--bg-color); -webkit-font-smoothing: antialiased; }
        *, *::before, *::after { box-sizing: border-box; }
        a { color: var(--theme-color); text-decoration: none; transition: color 0.3s; }
        a:hover { color: var(--theme-color-dark); }
        .container { max-width: var(--container-width); margin: 0 auto; padding: 0 15px; }
        .btn { display: inline-block; padding: 12px 28px; font-size: 16px; font-weight: 600; text-align: center; border-radius: 8px; transition: all 0.3s ease; cursor: pointer; border: none; }
        .btn-primary { background-color: var(--theme-color); color: #fff; }
        .btn-primary:hover { background-color: var(--theme-color-dark); transform: translateY(-2px); box-shadow: 0 4px 15px rgba(168,85,247,0.3); }
        header { position: fixed; top: 0; left: 0; width: 100%; z-index: 1000; padding: 15px 0; transition: all 0.3s ease; background-color: rgba(255,255,255,0.95); backdrop-filter: blur(10px); box-shadow: 0 2px 10px rgba(0,0,0,0.05); }
        .header-container { 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: 700; line-height: 1; color: #111; white-space: nowrap; }
        .main-nav { display: none; }
        .nav-toggle { display: block; width: 24px; height: 24px; cursor: pointer; z-index: 1002; position: relative; }
        .nav-toggle span { display: block; background-color: #333; height: 2px; width: 100%; border-radius: 2px; transition: all 0.3s; position: absolute; }
        .nav-toggle span:nth-child(1) { top: 5px; }
        .nav-toggle span:nth-child(2) { top: 11px; }
        .nav-toggle span:nth-child(3) { top: 17px; }
        .mobile-nav-open .nav-toggle span:nth-child(1) { top: 11px; transform: rotate(45deg); }
        .mobile-nav-open .nav-toggle span:nth-child(2) { opacity: 0; }
        .mobile-nav-open .nav-toggle span:nth-child(3) { top: 11px; transform: rotate(-45deg); }
        .drawer-nav { position: fixed; top: 0; left: -300px; width: 300px; height: 100%; background-color: #fff; box-shadow: 0 0 20px rgba(0,0,0,0.1); transition: left 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94); z-index: 1001; display: flex; flex-direction: column; }
        .drawer-nav-header { padding: 20px; border-bottom: 1px solid var(--border-color); }
        .drawer-nav-header .logo span { color: #111; }
        .drawer-nav-body { flex-grow: 1; overflow-y: auto; padding: 20px 0; }
        .drawer-nav-body a { display: block; padding: 12px 20px; font-size: 16px; color: var(--text-color); font-weight: 500; }
        .drawer-nav-body a:hover { background-color: var(--theme-color-light); color: var(--theme-color); }
        .nav-mask { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background-color: rgba(0,0,0,0.5); opacity: 0; visibility: hidden; transition: opacity 0.4s, visibility 0.4s; z-index: 1000; }
        .mobile-nav-open .drawer-nav { left: 0; }
        .mobile-nav-open .nav-mask { opacity: 1; visibility: visible; }
        .page-header { padding: 140px 0 60px; background: linear-gradient(135deg, rgb(168,85,247), rgb(126, 34, 206)); color: #fff; text-align: center; }
        .page-header h1 { font-size: 40px; margin: 0 0 10px; }
        .main-content { padding: 80px 0; }
        .download-section { text-align: center; }
        .download-section h2 { font-size: 36px; margin-bottom: 20px; }
        .download-section p { font-size: 18px; color: var(--text-color-light); max-width: 700px; margin: 0 auto 40px; }
        .download-buttons { display: flex; justify-content: center; gap: 20px; flex-wrap: wrap; }
        .download-btn { display: inline-flex; align-items: center; gap: 10px; padding: 15px 30px; font-size: 18px; font-weight: 600; border-radius: 8px; background-color: #2c3e50; color: #fff; transition: all 0.3s; }
        .download-btn:hover { background-color: #34495e; transform: translateY(-3px); }
        .download-btn .icon { font-size: 24px; }
        .steps-section { background-color: var(--bg-color-alt); padding: 80px 0; }
        .section-header { text-align: center; margin-bottom: 60px; }
        .section-header h2 { font-size: 36px; margin: 0 0 10px; font-weight: 700; color: #111; }
        .section-header p { font-size: 18px; color: var(--text-color-light); max-width: 700px; margin: 0 auto; }
        .steps-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 30px; }
        .step-item { background-color: #fff; padding: 30px; border-radius: 12px; text-align: center; box-shadow: 0 4px 15px rgba(0,0,0,0.05); }
        .step-item .step-number { display: inline-block; width: 50px; height: 50px; line-height: 50px; border-radius: 50%; background-color: var(--theme-color); color: #fff; font-size: 24px; font-weight: 700; margin-bottom: 20px; }
        .step-item h3 { font-size: 22px; margin: 0 0 10px; }
        .step-item p { color: var(--text-color-light); }
        footer { background-color: #1f2937; color: #d1d5db; padding: 60px 0 30px; }
        .footer-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 40px; margin-bottom: 40px; }
        .footer-col h4 { font-size: 18px; color: #fff; margin-bottom: 20px; }
        .footer-col p { margin-bottom: 20px; }
        .footer-col ul { list-style: none; padding: 0; margin: 0; }
        .footer-col ul li { margin-bottom: 10px; }
        .footer-col ul a { color: #d1d5db; transition: color 0.3s; }
        .footer-col ul a:hover { color: #fff; }
        .footer-col .logo span { color: #fff; }
        .footer-bottom { border-top: 1px solid #374151; padding-top: 30px; text-align: center; font-size: 14px; color: #9ca3af; }
        @media (min-width: 992px) {
            .main-nav { display: flex; align-items: center; gap: 30px; }
            .main-nav a { color: #333; font-weight: 500; position: relative; padding: 5px 0; }
            .main-nav a::after { content: ''; position: absolute; bottom: 0; left: 0; width: 0; height: 2px; background-color: var(--theme-color); transition: width 0.3s; }
            .main-nav a:hover::after, .main-nav a.active::after { width: 100%; }
            .nav-toggle { display: none; }
        }