:root {
            --primary: #1D7BFF;
            --primary-glow: rgba(29, 123, 255, 0.15);
            --ocean-ink: #0A1128;
            --ocean-light: #1C2541;
            --glacier-blue: #48CAE4;
            --silver-white: #F4F6F9;
            --slate-gray: rgb(75,85,99);
            --slate-light: #E2E8F0;
            --text-main: #1E293B;
            --text-muted: #64748B;
            --glass-bg: rgba(255, 255, 255, 0.85);
            --glass-border: rgba(226, 232, 240, 0.8);
            --shadow: 0 10px 30px -10px rgba(0,0,0,0.08);
            --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, sans-serif; background-color: var(--silver-white); color: var(--text-main); line-height: 1.6; }
        a { text-decoration: none; color: inherit; transition: var(--transition); }

        header { background: var(--glass-bg); backdrop-filter: blur(12px); border-bottom: 1px solid var(--glass-border); position: sticky; top: 0; z-index: 100; }
        .header-container { max-width: 1200px; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; padding: 15px 20px; }
        .logo { display: inline-flex; align-items: center; gap: 12px; }
        .logo img { height: 40px; width: auto; max-width: 160px; object-fit: contain; }
        .logo span { font-size: 18px; font-weight: 800; color: var(--ocean-ink); }
        .nav-desktop { display: flex; align-items: center; gap: 32px; }
        .nav-desktop a { font-size: 15px; font-weight: 500; color: var(--slate-gray); }
        .menu-toggle { display: none; background: none; border: none; font-size: 24px; color: var(--ocean-ink); cursor: pointer; }

        .drawer-backdrop { position: fixed; top: 0; left: 0; width: 100vw; height: 100vh; background: rgba(10, 17, 40, 0.6); backdrop-filter: blur(4px); z-index: 999; opacity: 0; pointer-events: none; transition: var(--transition); }
        .drawer { position: fixed; top: 0; left: -320px; width: 300px; height: 100vh; background: #fff; z-index: 1000; box-shadow: 5px 0 30px rgba(0,0,0,0.15); display: flex; flex-direction: column; transition: var(--transition); }
        .drawer.active { left: 0; }
        .drawer-backdrop.active { opacity: 1; pointer-events: auto; }
        .drawer-header { padding: 24px; border-bottom: 1px solid var(--slate-light); display: flex; justify-content: space-between; align-items: center; }
        .drawer-close { background: none; border: none; font-size: 28px; color: var(--text-muted); cursor: pointer; }
        .drawer-nav { padding: 24px; display: flex; flex-direction: column; gap: 20px; overflow-y: auto; flex: 1; }
        .drawer-nav a { font-size: 16px; font-weight: 600; color: var(--text-main); padding: 8px 12px; }

        .page-header { background: radial-gradient(circle at 50% 0%, var(--ocean-light) 0%, var(--ocean-ink) 100%); color: #fff; padding: 60px 20px; text-align: center; }
        .page-header h1 { font-size: 32px; font-weight: 800; }

        .main-container { max-width: 1200px; margin: 60px auto; padding: 0 20px; display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 32px; }
        
        .download-card { background: #fff; border: 1px solid var(--glass-border); border-radius: 16px; padding: 40px; text-align: center; transition: var(--transition); }
        .download-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); border-color: var(--primary); }
        .download-icon { font-size: 48px; margin-bottom: 24px; display: inline-block; }
        .download-card h3 { font-size: 22px; font-weight: 700; color: var(--ocean-ink); margin-bottom: 12px; }
        .download-card p { font-size: 14px; color: var(--text-muted); margin-bottom: 30px; }
        .download-meta { display: flex; justify-content: center; gap: 16px; margin-bottom: 30px; font-size: 12px; color: var(--text-muted); }
        
        .btn-download { display: inline-flex; align-items: center; gap: 8px; background: var(--primary); color: #fff; padding: 14px 28px; border-radius: 10px; font-weight: 600; }
        .btn-download:hover { background: #3b82f6; }

        .step-section { max-width: 1200px; margin: 80px auto; padding: 0 20px; }
        .step-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 24px; margin-top: 40px; }
        .step-card { background: #fff; border: 1px solid var(--glass-border); border-radius: 12px; padding: 24px; position: relative; }
        .step-num { width: 36px; height: 36px; border-radius: 50%; background: var(--primary-glow); color: var(--primary); display: flex; align-items: center; justify-content: center; font-weight: 800; margin-bottom: 16px; }
        .step-card h4 { font-size: 16px; font-weight: 700; margin-bottom: 10px; color: var(--ocean-ink); }
        .step-card p { font-size: 13px; color: var(--text-muted); }

        footer { background: var(--ocean-ink); color: #94A3B8; font-size: 14px; border-top: 1px solid var(--ocean-light); }
        .footer-top { max-width: 1200px; margin: 0 auto; padding: 60px 20px; display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 40px; }
        .footer-col h3 { font-size: 16px; color: #fff; font-weight: 700; margin-bottom: 20px; }
        .footer-col ul { list-style: none; }
        .footer-col ul li { margin-bottom: 12px; }
        .footer-col ul li a:hover { color: #fff; }
        .footer-brand p { margin-top: 15px; font-size: 13px; line-height: 1.6; }
        .footer-brand .logo span { color: #fff; }
        .footer-bottom { border-top: 1px solid var(--ocean-light); padding: 30px 20px; text-align: center; }

        @media (max-width: 768px) {
            .nav-desktop { display: none; }
            .menu-toggle { display: block; }
        }