body {
    font-family: Arial, Helvetica, sans-serif;
    background-color: #f4f6f8;
    margin: 0;
    padding: 0;
    color: #333;
}

.container {
    max-width: 900px;
    margin: 40px auto;
    background: #ffffff;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
}

h1 {
    text-align: center;
    color: #2c3e50;
}

.effective {
    text-align: center;
    font-size: 14px;
    color: #777;
    margin-bottom: 30px;
}

section {
    margin-bottom: 25px;
}

h2 {
    color: #1a5276;
    font-size: 20px;
    margin-bottom: 10px;
}

p, li {
    font-size: 15px;
    line-height: 1.7;
}

ul {
    padding-left: 20px;
}

@media (max-width: 600px) {
    .container {
        margin: 20px;
        padding: 20px;
    }
}