* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        body {
            background-color: #f5f7fa;
            color: #333;
            line-height: 1.6;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 20px;
        }
        header {
            text-align: center;
            padding: 40px 0;
            background-color: #fff;
            border-radius: 8px;
            box-shadow: 0 2px 10px rgba(0,0,0,0.05);
            margin-bottom: 30px;
        }
        h1 {
            color: #2c3e50;
            font-size: 2.5rem;
            margin-bottom: 10px;
        }
        .subtitle {
            color: #7f8c8d;
            font-size: 1.1rem;
        }
        .section {
            background-color: #fff;
            border-radius: 8px;
            box-shadow: 0 2px 10px rgba(0,0,0,0.05);
            padding: 30px;
            margin-bottom: 30px;
        }
        h2 {
            color: #2980b9;
            font-size: 1.8rem;
            margin-bottom: 20px;
            border-bottom: 2px solid #ecf0f1;
            padding-bottom: 10px;
        }
        .intro {
            margin-bottom: 25px;
            font-size: 1.05rem;
            color: #555;
        }
        .alternative-list {
            margin: 20px 0;
            padding-left: 20px;
        }
        .alternative-list li {
            margin-bottom: 10px;
            color: #34495e;
        }
        .alternative-list strong {
            color: #27ae60;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            margin-top: 20px;
        }
        table thead {
            background-color: #2980b9;
            color: #fff;
        }
        table th, table td {
            padding: 12px 15px;
            text-align: left;
            border-bottom: 1px solid #ecf0f1;
        }
        table tbody tr:hover {
            background-color: #f8f9fa;
        }
        .spec-note {
            margin-top: 15px;
            font-size: 0.95rem;
            color: #7f8c8d;
        }
        footer {
            text-align: center;
            padding: 20px 0;
            color: #7f8c8d;
            font-size: 0.9rem;
        }
        footer a {
            color: #2980b9;
            text-decoration: none;
        }
        footer a:hover {
            text-decoration: underline;
        }
        @media (max-width: 768px) {
            h1 {
                font-size: 2rem;
            }
            .section {
                padding: 20px;
            }
            table {
                font-size: 0.9rem;
            }
        }