* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
    line-height: 1.6;
}

body {
    color: #333;
    padding: 20px;
    max-width: 800px;
    margin: 0 auto;
    background-color: #fff;
    font-size: 15px;
}

.container {
    width: 100%;
    word-break: break-word;
}

h1 {
    font-size: 22px;
    text-align: center;
    margin: 20px 0;
    color: #1a1a1a;
    font-weight: 600;
}

h2 {
    font-size: 18px;
    margin: 25px 0 10px;
    color: #2c3e50;
    font-weight: 600;
}

h3 {
    font-size: 16px;
    margin: 20px 0 8px;
    color: #34495e;
    font-weight: 600;
}

p, li {
    margin-bottom: 12px;
    text-align: justify;
}

ul, ol {
    padding-left: 24px;
    margin-bottom: 12px;
}

.update-date {
    text-align: center;
    color: #666;
    margin-bottom: 20px;
    font-size: 14px;
}

.section {
    margin-bottom: 20px;
}

.indent {
    text-indent: 2em;
}

.bold {
    font-weight: 600;
}

@media (max-width: 480px) {
    body {
        padding: 12px;
        font-size: 14px;
    }

    h1 {
        font-size: 20px;
    }

    h2 {
        font-size: 17px;
    }

    h3 {
        font-size: 15px;
    }
}