:root {
            --primary: rgb(55,65,81);
            --primary-dark: rgb(31,41,55);
            --bg-body: #f9fafb;
            --bg-white: #ffffff;
            --text-main: #111827;
            --text-muted: #6b7280;
            --border-color: #e5e7eb;
            --radius-md: 8px;
            --radius-lg: 12px;
            --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
            --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
            --transition: all 0.3s ease;
        }
        * { box-sizing: border-box; margin: 0; padding: 0; }
        body { font-family: -apple-system, BlinkMacSystemFont, sans-serif; background-color: var(--bg-body); color: var(--text-main); line-height: 1.6; }
        a { text-decoration: none; color: inherit; transition: var(--transition); }
        ul, ol { list-style: none; }
        img { max-width: 100%; height: auto; display: block; }
        .container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 20px; }
        
        
        .site-header { background: var(--bg-white); box-shadow: var(--shadow-sm); position: sticky; top: 0; z-index: 50; }
        .header-inner { display: flex; align-items: center; justify-content: space-between; height: 70px; }
        .logo { display: inline-flex; align-items: center; gap: 12px; text-decoration: none; }
        .logo img { display: block; height: 36px; 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(--primary); white-space: nowrap; }
        .desktop-nav { display: none; }
        @media (min-width: 992px) {
            .desktop-nav { display: block; flex: 1; margin: 0 40px; }
            .desktop-nav ul { display: flex; gap: 24px; align-items: center; }
            .desktop-nav a { font-weight: 500; font-size: 15px; padding: 8px 0; position: relative; }
            .desktop-nav a:hover { 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 { width: 100%; }
        }
        .mobile-menu-btn { display: block; background: none; border: none; padding: 8px; cursor: pointer; color: var(--text-main); }
        .mobile-menu-btn svg { width: 24px; height: 24px; fill: currentColor; }
        @media (min-width: 992px) { .mobile-menu-btn { display: none; } }
        
        .mobile-drawer-overlay { position: fixed; inset: 0; background: rgba(0,0,0,0.5); z-index: 100; opacity: 0; visibility: hidden; transition: var(--transition); }
        .mobile-drawer-overlay.active { opacity: 1; visibility: visible; }
        .mobile-drawer { position: fixed; top: 0; left: -300px; width: 280px; height: 100%; background: var(--bg-white); z-index: 101; transition: var(--transition); display: flex; flex-direction: column; }
        .mobile-drawer.active { left: 0; }
        .drawer-header { display: flex; align-items: center; justify-content: space-between; padding: 20px; border-bottom: 1px solid var(--border-color); }
        .drawer-close-btn { background: none; border: none; font-size: 28px; color: var(--text-muted); cursor: pointer; }
        .drawer-body { flex: 1; overflow-y: auto; padding: 20px 0; }
        .drawer-body ul li a { display: block; padding: 12px 24px; font-weight: 500; border-bottom: 1px solid #f3f4f6; }

        
        .dl-hero { background: var(--bg-white); padding: 80px 0; border-bottom: 1px solid var(--border-color); overflow: hidden; }
        .dl-hero-grid { display: grid; grid-template-columns: 1fr; gap: 50px; align-items: center; }
        @media (min-width: 992px) { .dl-hero-grid { grid-template-columns: 1fr 1fr; } }
        .dl-content h1 { font-size: 38px; font-weight: 800; color: var(--text-main); margin-bottom: 20px; line-height: 1.2; }
        .dl-content p { font-size: 16px; color: var(--text-muted); margin-bottom: 30px; max-width: 500px; }
        
        .dl-buttons { display: flex; gap: 20px; flex-wrap: wrap; margin-bottom: 30px; }
        .dl-btn { display: inline-flex; align-items: center; justify-content: center; gap: 10px; padding: 14px 28px; border-radius: var(--radius-lg); font-size: 16px; font-weight: 600; color: #fff; background: var(--primary); box-shadow: var(--shadow-sm); transition: var(--transition); border: none; cursor: pointer; }
        .dl-btn:hover { background: var(--primary-dark); transform: translateY(-3px); box-shadow: var(--shadow-md); }
        .dl-btn svg { width: 24px; height: 24px; fill: currentColor; }
        .dl-btn.ios { background: #000; }
        .dl-btn.ios:hover { background: #333; }
        
        .qr-code-area { display: flex; align-items: center; gap: 20px; padding: 20px; background: var(--bg-body); border-radius: var(--radius-md); display: inline-flex; border: 1px dashed var(--border-color); }
        .qr-placeholder { width: 100px; height: 100px; background: #fff; display: flex; align-items: center; justify-content: center; border-radius: 8px; box-shadow: var(--shadow-sm); }
        .qr-placeholder svg { width: 60px; height: 60px; fill: var(--primary); }
        .qr-text { font-size: 14px; color: var(--text-muted); }
        .qr-text strong { display: block; color: var(--text-main); font-size: 16px; margin-bottom: 5px; }
        
        .dl-visual { position: relative; perspective: 1000px; }
        .phone-mockup { width: 300px; height: 600px; background: #fff; border: 12px solid #1f2937; border-radius: 40px; margin: 0 auto; box-shadow: 0 25px 50px -12px rgba(0,0,0,0.25); position: relative; overflow: hidden; transform: rotateY(-10deg) rotateX(5deg); }
        .phone-mockup::before { content: ''; position: absolute; top: 0; left: 50%; transform: translateX(-50%); width: 120px; height: 24px; background: #1f2937; border-bottom-left-radius: 12px; border-bottom-right-radius: 12px; z-index: 10; }
        .phone-screen { width: 100%; height: 100%; background: linear-gradient(135deg, var(--primary) 0%, #1f2937 100%); display: flex; flex-direction: column; padding: 40px 20px 20px; }
        .screen-ui { background: rgba(255,255,255,0.1); border-radius: 8px; margin-bottom: 15px; padding: 15px; }
        .screen-ui.graph { flex: 1; display: flex; align-items: flex-end; gap: 10px; justify-content: space-between; }
        .screen-ui.graph span { width: 15%; background: #ca8a04; border-radius: 4px 4px 0 0; }

        
        .dl-steps { padding: 80px 0; }
        .section-title { text-align: center; font-size: 28px; font-weight: 700; margin-bottom: 50px; }
        .step-grid { display: grid; grid-template-columns: 1fr; gap: 30px; counter-reset: step-counter; }
        @media (min-width: 768px) { .step-grid { grid-template-columns: repeat(3, 1fr); } }
        .step-card { background: var(--bg-white); padding: 40px 30px; border-radius: var(--radius-lg); text-align: center; position: relative; border: 1px solid var(--border-color); box-shadow: var(--shadow-sm); }
        .step-card::before { counter-increment: step-counter; content: counter(step-counter); position: absolute; top: -20px; left: 50%; transform: translateX(-50%); width: 40px; height: 40px; background: var(--primary); color: #fff; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 20px; font-weight: 800; border: 4px solid var(--bg-body); }
        .step-card h3 { font-size: 20px; margin: 20px 0 10px; color: var(--text-main); }
        .step-card p { font-size: 14px; color: var(--text-muted); }
        
        
        .site-footer { background: #1f2937; color: #9ca3af; padding: 60px 0 20px; font-size: 14px; }
        .footer-grid { display: grid; grid-template-columns: 1fr; gap: 40px; margin-bottom: 40px; max-width:1200px; margin-left:auto; margin-right:auto; padding:0 20px;}
        @media (min-width: 768px) { .footer-grid { grid-template-columns: 2fr 1fr 1fr; } }
        .footer-brand .logo span { color: #fff; }
        .footer-desc { margin-top: 16px; line-height: 1.8; }
        .footer-nav h3, .footer-links h3 { color: #fff; font-size: 16px; font-weight: 600; margin-bottom: 20px; }
        .footer-nav ul, .footer-links ul { display: flex; flex-direction: column; gap: 12px; }
        .footer-nav a:hover, .footer-links a:hover { color: #fff; }
        .footer-bottom { border-top: 1px solid #374151; padding-top: 20px; text-align: center; display: flex; flex-direction: column; gap: 10px; align-items: center; max-width:1200px; margin:0 auto;}
        @media (min-width: 768px) { .footer-bottom { flex-direction: row; justify-content: space-between; } }
        .footer-bottom-links { display: flex; gap: 16px; }