* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            background-color: #ffffff;
            color: #1e1e2f;
            line-height: 1.5;
        }

        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .site-header {
            background-color: #ffffff;
            border-bottom: 1px solid #eaeef2;
            position: sticky;
            top: 0;
            z-index: 100;
            backdrop-filter: blur(8px);
            background-color: rgba(255, 255, 255, 0.96);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            padding: 20px 0;
            gap: 16px;
        }

        .logo-area {
            display: flex;
            align-items: center;
            gap: 10px;
            text-decoration: none;
        }

        .logo-svg {
            width: 36px;
            height: 36px;
            display: block;
        }

        .logo-text {
            font-size: 26px;
            font-weight: 700;
            letter-spacing: -0.5px;
            color: #0a2540;
        }

        .nav-links {
            display: flex;
            gap: 32px;
            align-items: center;
            flex-wrap: wrap;
        }

        .nav-links a {
            text-decoration: none;
            font-weight: 500;
            color: #2c3e4e;
            transition: color 0.2s;
            font-size: 1rem;
        }

        .nav-links a:hover,
        .nav-links a.active {
            color: #1c6e8f;
        }

        .lang-switch {
            display: flex;
            gap: 12px;
            border-left: 1px solid #dce5ec;
            padding-left: 24px;
        }

        .lang-switch span {
            font-size: 0.85rem;
            font-weight: 500;
            color: #5a6e7c;
            cursor: default;
        }

        .lang-switch .active-lang {
            color: #1c6e8f;
            font-weight: 600;
        }

        .page-hero {
            background: linear-gradient(135deg, #f1f7fc 0%, #ffffff 100%);
            padding: 56px 0 48px;
            text-align: center;
            border-bottom: 1px solid #e2edf2;
        }

        .page-hero h1 {
            font-size: clamp(2rem, 4vw, 3rem);
            font-weight: 800;
            color: #0a2540;
            margin-bottom: 16px;
        }

        .page-hero p {
            font-size: 1.2rem;
            color: #3e5a76;
            max-width: 680px;
            margin: 0 auto;
        }

        .download-platforms {
            padding: 70px 0 90px;
            background: #ffffff;
        }

        .platform-grid {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 40px;
            margin-top: 20px;
        }

        .platform-card {
            background: #ffffff;
            border-radius: 36px;
            box-shadow: 0 20px 35px -12px rgba(0, 0, 0, 0.08);
            flex: 1;
            min-width: 240px;
            max-width: 280px;
            padding: 32px 24px;
            text-align: center;
            transition: transform 0.2s, box-shadow 0.2s;
            border: 1px solid #edf2f6;
        }

        .platform-card:hover {
            transform: translateY(-6px);
            box-shadow: 0 28px 40px -16px rgba(0, 0, 0, 0.12);
            border-color: #d0e2ed;
        }

        .platform-icon {
            font-size: 58px;
            margin-bottom: 20px;
        }

        .platform-card h2 {
            font-size: 1.8rem;
            font-weight: 700;
            margin-bottom: 12px;
            color: #0f2b3d;
        }

        .platform-desc {
            color: #5a6e7c;
            font-size: 0.9rem;
            margin-bottom: 24px;
            min-height: 60px;
        }

        .download-btn {
            display: inline-block;
            background-color: #0f2b3d;
            color: white;
            padding: 12px 28px;
            border-radius: 40px;
            font-weight: 600;
            text-decoration: none;
            transition: all 0.2s;
            margin-top: 8px;
            font-size: 0.95rem;
        }

        .download-btn:hover {
            background-color: #1c6e8f;
            transform: scale(1.02);
            box-shadow: 0 6px 14px rgba(28, 110, 143, 0.25);
        }

        .version-info {
            margin-top: 20px;
            font-size: 0.75rem;
            color: #8ba0ae;
        }

        .comparison-section {
            background: #f8fbfe;
            padding: 64px 0;
            border-top: 1px solid #e9f0f5;
        }

        .comparison-table {
            overflow-x: auto;
        }

        .comparison-table table {
            width: 100%;
            border-collapse: collapse;
            background: white;
            border-radius: 28px;
            overflow: hidden;
            box-shadow: 0 4px 14px rgba(0,0,0,0.02);
        }

        .comparison-table th, .comparison-table td {
            padding: 18px 16px;
            text-align: left;
            border-bottom: 1px solid #eef3f8;
        }

        .comparison-table th {
            background-color: #f0f6fa;
            font-weight: 600;
            color: #1a4a6e;
        }

        .comparison-table tr:last-child td {
            border-bottom: none;
        }

        .check-mark {
            color: #2a9d8f;
            font-weight: 700;
        }

        .site-footer {
            background: #0a1c2a;
            color: #cddfe7;
            padding: 56px 0 32px;
        }

        .footer-grid {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 40px;
            margin-bottom: 48px;
        }

        .footer-col {
            flex: 1;
            min-width: 150px;
        }

        .footer-col h4 {
            color: white;
            margin-bottom: 20px;
            font-size: 1rem;
        }

        .footer-col a {
            display: block;
            color: #b9d0df;
            text-decoration: none;
            margin-bottom: 12px;
            font-size: 0.9rem;
            transition: color 0.2s;
        }

        .footer-col a:hover {
            color: white;
        }

        .copyright {
            text-align: center;
            padding-top: 32px;
            border-top: 1px solid #1e3a4a;
            font-size: 0.85rem;
        }

        @media (max-width: 768px) {
            .header-inner {
                flex-direction: column;
                align-items: flex-start;
            }
            .nav-links {
                width: 100%;
                justify-content: space-between;
            }
            .lang-switch {
                border-left: none;
                padding-left: 0;
                margin-top: 8px;
            }
            .platform-grid {
                gap: 30px;
            }
            .platform-card {
                max-width: 100%;
            }
        }