<style>
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            background-color: #ffffff;
            color: #1f2937;
            line-height: 1.5;
        }
        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
        }
        :root {
            --primary-light: #eef5ff;
            --primary: #2b7ef2;
            --primary-dark: #1a5bc4;
            --gray-bg: #f9fafb;
            --border-light: #e5e7eb;
        }
        .navbar {
            background: white;
            border-bottom: 1px solid var(--border-light);
            position: sticky;
            top: 0;
            z-index: 50;
            backdrop-filter: blur(8px);
            background-color: rgba(255,255,255,0.96);
        }
        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            padding: 16px 24px;
            max-width: 1400px;
            margin: 0 auto;
        }
        .logo-area {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .logo-icon {
            font-size: 28px;
            color: var(--primary);
        }
        .logo-area h1 {
            font-size: 1.8rem;
            font-weight: 700;
            margin: 0;
            line-height: 1;
        }
        .logo-area h1 a {
            text-decoration: none;
            color: #0a2540;
            letter-spacing: -0.5px;
        }
        .logo-area h1 a span {
            color: var(--primary);
        }
        .nav-links {
            display: flex;
            gap: 32px;
            align-items: center;
        }
        .nav-links a {
            text-decoration: none;
            font-weight: 500;
            color: #1f2937;
            transition: color 0.2s;
        }
        .nav-links a:hover, .nav-links a.active {
            color: var(--primary);
        }
        .btn-primary {
            background-color: var(--primary);
            color: white;
            padding: 10px 24px;
            border-radius: 40px;
            text-decoration: none;
            font-weight: 600;
            display: inline-block;
            transition: background 0.2s;
            border: none;
            cursor: pointer;
        }
        .btn-primary:hover {
            background-color: var(--primary-dark);
        }
        .btn-outline {
            border: 1px solid var(--primary);
            background: transparent;
            color: var(--primary);
            padding: 10px 24px;
            border-radius: 40px;
            font-weight: 600;
            text-decoration: none;
            display: inline-block;
            transition: all 0.2s;
        }
        .btn-outline:hover {
            background: var(--primary);
            color: white;
        }
        .section-title {
            font-size: 2rem;
            font-weight: 700;
            text-align: center;
            margin: 48px 0 24px;
        }
        .grid-download {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 32px;
            margin: 40px 0;
        }
        .download-card {
            background: white;
            border-radius: 28px;
            padding: 28px 20px;
            box-shadow: 0 12px 30px rgba(0,0,0,0.05);
            border: 1px solid var(--border-light);
            text-align: center;
            transition: transform 0.2s;
        }
        .download-card:hover { transform: translateY(-6px);}
        .download-icon {
            font-size: 3rem;
            color: var(--primary);
            margin-bottom: 20px;
        }
        .os-version {
            font-size: 0.85rem;
            color: #4b5563;
            margin: 8px 0;
        }
        .btn-download {
            background: var(--primary-light);
            color: var(--primary-dark);
            padding: 10px 20px;
            border-radius: 40px;
            text-decoration: none;
            font-weight: 600;
            display: inline-block;
            margin-top: 16px;
            transition: all 0.2s;
        }
        .btn-download:hover {
            background: var(--primary);
            color: white;
        }
        .faq-item {
            border-bottom: 1px solid var(--border-light);
            margin-bottom: 12px;
        }
        details {
            padding: 16px 0;
            cursor: pointer;
        }
        summary {
            font-weight: 600;
            font-size: 1.1rem;
            list-style: none;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        summary::-webkit-details-marker { display: none; }
        summary:after {
            content: "➕";
            font-size: 1rem;
            color: var(--primary);
        }
        details[open] summary:after {
            content: "➖";
        }
        .footer {
            background: #0a2540;
            color: #e2e8f0;
            padding: 48px 0 24px;
            margin-top: 60px;
        }
        .keyword-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            justify-content: center;
            margin: 20px 0;
        }
        .keyword-tags a {
            background: #1e3a5f;
            padding: 6px 14px;
            border-radius: 30px;
            font-size: 0.85rem;
            color: #cbd5e1;
            text-decoration: none;
        }
        .hero-download {
            background: linear-gradient(120deg, #eef5ff, #ffffff);
            padding: 60px 0;
            text-align: center;
        }
        @media (max-width: 768px) {
            .nav-container { flex-direction: column; gap: 16px; }
            .section-title { font-size: 1.8rem; }
        }
    </style>