body {
    background-color: #ecf0f1;
}

.page-content {
    max-width: 900px;
    margin: 0 auto;
    padding: 40px 20px;
    background-color: white;
    margin-top: 20px;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.page-content h1 {
    color: #2c3e50;
    margin-top: 0;
    text-align: left;
    font-size: 36px;
    margin-bottom: 30px;
}

.page-content h2 {
    color: #34495e;
    margin-top: 30px;
    margin-bottom: 15px;
    font-size: 24px;
}

.page-content h3 {
    color: #34495e;
    margin-top: 20px;
    margin-bottom: 10px;
    font-size: 20px;
}

.page-content p {
    color: #555;
    margin-bottom: 15px;
    font-size: 16px;
    line-height: 1.8;
}

.page-content ul {
    margin-left: 30px;
    margin-bottom: 20px;
}

.page-content li {
    color: #555;
    margin-bottom: 10px;
    line-height: 1.6;
}

.tip-box {
    background-color: #e8f4f8;
    border-left: 4px solid #3498db;
    padding: 20px;
    margin: 20px 0;
    border-radius: 5px;
}

.tip-box strong {
    color: #2980b9;
}

.warning-box {
    background-color: #fef5e7;
    border-left: 4px solid #f39c12;
    padding: 20px;
    margin: 20px 0;
    border-radius: 5px;
}

.warning-box strong {
    color: #d68910;
}