* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Arial', sans-serif;
        }
        body {
            background-color: #f5f7fa;
            color: #333;
            line-height: 1.6;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 20px;
        }
        .header {
            background-color: #1a237e;
            color: white;
            padding: 30px 0;
            text-align: center;
            margin-bottom: 30px;
            border-radius: 8px;
        }
        .header h1 {
            font-size: 32px;
            margin-bottom: 10px;
        }
        .header p {
            font-size: 18px;
            opacity: 0.9;
        }
        .section {
            background: white;
            padding: 25px;
            border-radius: 8px;
            margin-bottom: 25px;
            box-shadow: 0 2px 10px rgba(0,0,0,0.05);
        }
        .section h2 {
            color: #1a237e;
            font-size: 24px;
            margin-bottom: 15px;
            border-left: 5px solid #1a237e;
            padding-left: 10px;
        }
        .section h3 {
            color: #283593;
            font-size: 20px;
            margin: 20px 0 12px;
        }
        .keyword-list {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin: 15px 0;
        }
        .keyword-list span {
            background-color: #e8eaf6;
            color: #1a237e;
            padding: 6px 12px;
            border-radius: 20px;
            font-size: 14px;
        }
        .content-text {
            font-size: 16px;
            margin-bottom: 15px;
            color: #444;
        }
        .spec-table {
            width: 100%;
            border-collapse: collapse;
            margin: 15px 0;
            font-size: 15px;
        }
        .spec-table td {
            border: 1px solid #e0e0e0;
            padding: 10px 12px;
            vertical-align: top;
        }
        .spec-table td:first-child {
            width: 38%;
            font-weight: 60%;
            background-color: #f8f9fa;
        }
        .whatsapp-btn {
            display: inline-block;
            background-color: #25D366;
            color: #fff;
            padding: 10px 20px;
            border-radius: 50px;
            text-decoration: none;
            font-weight: bold;
            margin-top: 10px;
        }
        .whatsapp-btn:hover {
            opacity: 0.9;
        }
        .cta {
            background-color: #283593;
            color: white;
            text-align: center;
            padding: 30px;
            border-radius: 8px;
            margin-top: 20px;
        }
        .cta h2 {
            color: white;
            margin-bottom: 15px;
        }
        .cta p {
            font-size: 17px;
            margin-bottom: 10px;
        }