:root { --primary: rgb(14,116,144); --primary-light: rgba(14,116,144,0.05); --text-main: #1e293b; --text-muted: #64748b; --bg-body: #f8fafc; --border-color: #e2e8f0; }
        * { margin: 0; padding: 0; box-sizing: border-box; }
        body { font-family: sans-serif; background: var(--bg-body); color: var(--text-main); line-height: 1.6; display: flex; flex-direction: column; min-height: 100vh; }
        a { text-decoration: none; color: inherit; transition: 0.3s; }
        ul { list-style: none; }
        img { max-width: 100%; display: block; }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
        
        .header { background: #fff; box-shadow: 0 2px 10px rgba(0,0,0,0.05); position: sticky; top: 0; z-index: 100; }
        .header-inner { display: flex; justify-content: space-between; align-items: center; height: 80px; }
        .logo { display: inline-flex; align-items: center; gap: 12px; }
        .logo img { height: 45px; max-width: 180px; object-fit: contain; flex-shrink: 0; }
        .logo span { font-size: 22px; font-weight: 800; color: var(--primary); white-space: nowrap; }
        .desktop-nav { display: flex; gap: 30px; }
        .desktop-nav a { font-weight: 500; padding: 8px 12px; border-radius: 6px; }
        .desktop-nav a:hover { color: var(--primary); background: var(--primary-light); }
        .menu-toggle { display: none; font-size: 24px; color: var(--primary); cursor: pointer; }
        
        .drawer-overlay { position: fixed; inset: 0; background: rgba(0,0,0,0.5); z-index: 999; opacity: 0; visibility: hidden; transition: 0.3s; }
        .drawer-overlay.active { opacity: 1; visibility: visible; }
        .drawer { position: fixed; top: 0; left: -300px; width: 280px; height: 100%; background: #fff; z-index: 1000; transition: 0.3s; display: flex; flex-direction: column; }
        .drawer.active { left: 0; }
        .drawer-header { padding: 20px; border-bottom: 1px solid var(--border-color); display: flex; justify-content: space-between; align-items: center; }
        .drawer-close { font-size: 28px; cursor: pointer; color: var(--text-muted); }
        .drawer-nav { padding: 20px 0; }
        .drawer-nav a { display: block; padding: 15px 25px; border-bottom: 1px solid var(--border-color); font-weight: 500; }

        
        .dl-hero { padding: 80px 0; background: #fff; text-align: center; border-bottom: 1px solid var(--border-color); }
        .dl-hero h1 { font-size: 38px; color: var(--primary); margin-bottom: 20px; }
        .dl-hero p { font-size: 18px; color: var(--text-muted); max-width: 700px; margin: 0 auto 40px; }
        .dl-box { display: inline-block; background: var(--bg-body); padding: 30px 50px; border-radius: 16px; border: 2px dashed var(--primary); }
        .code-display { font-size: 42px; font-weight: 900; letter-spacing: 5px; color: var(--text-main); margin-bottom: 15px; }
        .copy-btn { background: var(--primary); color: #fff; border: none; padding: 12px 30px; font-size: 16px; font-weight: bold; border-radius: 30px; cursor: pointer; transition: 0.3s; box-shadow: 0 5px 15px rgba(14,116,144,0.2); }
        .copy-btn:hover { background: var(--primary-hover); transform: translateY(-2px); }

        .steps-section { padding: 80px 0; }
        .sec-title { text-align: center; margin-bottom: 50px; }
        .sec-title h2 { font-size: 30px; color: var(--primary); margin-bottom: 15px; }
        
        .steps-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; position: relative; }
        .step-card { background: #fff; padding: 40px 30px; border-radius: 12px; box-shadow: 0 5px 20px rgba(0,0,0,0.03); text-align: center; position: relative; z-index: 2; border: 1px solid var(--border-color); }
        .step-num { width: 60px; height: 60px; background: var(--primary); color: #fff; font-size: 24px; font-weight: bold; border-radius: 50%; display: flex; align-items: center; justify-content: center; margin: -70px auto 20px; border: 5px solid #fff; box-shadow: 0 5px 10px rgba(0,0,0,0.1); }
        .step-card h3 { font-size: 20px; margin-bottom: 15px; }
        .step-card p { color: var(--text-muted); font-size: 15px; }
        .step-img { margin-top: 20px; border-radius: 8px; overflow: hidden; border: 1px solid var(--border-color); }

        .faq-section { background: #fff; padding: 80px 0; }
        .faq-list { max-width: 800px; margin: 0 auto; }
        .faq-item { border-bottom: 1px solid var(--border-color); padding: 25px 0; }
        .faq-item h4 { font-size: 18px; color: var(--text-main); margin-bottom: 10px; display: flex; align-items: center; gap: 10px; }
        .faq-item h4::before { content: 'Q'; color: var(--primary); font-weight: 900; font-size: 22px; }
        .faq-item p { color: var(--text-muted); padding-left: 28px; font-size: 15px; }

        .footer { background: #1e293b; color: #94a3b8; padding: 60px 0 20px; margin-top: auto; }
        .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
        .foot-about .logo span, .foot-title { color: #fff; }
        .foot-links li { margin-bottom: 12px; }
        .footer-bottom { text-align: center; padding-top: 20px; border-top: 1px solid rgba(255,255,255,0.1); }

        @media(max-width: 992px) { .steps-grid { grid-template-columns: 1fr; gap: 60px; margin-top: 40px; } .step-num { margin: -70px auto 20px; } }
        @media(max-width: 768px) { .desktop-nav { display: none; } .menu-toggle { display: block; } .footer-grid { grid-template-columns: 1fr; } .dl-hero h1 { font-size: 28px; } .code-display { font-size: 32px; } }