* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f5f7;
    padding: 20px;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    background-color: #fff;
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

h1 {
    font-size: 32px;
    font-weight: 600;
    margin-bottom: 10px;
    color: #1d1d1f;
}

.subtitle {
    font-size: 18px;
    color: #86868b;
    margin-bottom: 30px;
}

.last-updated {
    font-size: 14px;
    color: #86868b;
    margin-bottom: 40px;
    padding-bottom: 20px;
    border-bottom: 1px solid #d2d2d7;
}

h2 {
    font-size: 24px;
    font-weight: 600;
    margin-top: 40px;
    margin-bottom: 15px;
    color: #1d1d1f;
}

h3 {
    font-size: 20px;
    font-weight: 600;
    margin-top: 30px;
    margin-bottom: 12px;
    color: #1d1d1f;
}

p,
li {
    font-size: 16px;
    margin-bottom: 15px;
    color: #1d1d1f;
}

ul,
ol {
    margin-left: 20px;
    margin-bottom: 20px;
}

li {
    margin-bottom: 10px;
}

.highlight {
    background-color: #f5f5f7;
    padding: 20px;
    border-radius: 8px;
    margin: 20px 0;
}

.warning {
    background-color: #fff3cd;
    border-left: 4px solid #ff9500;
    padding: 20px;
    border-radius: 8px;
    margin: 20px 0;
}

.contact {
    margin-top: 40px;
    padding-top: 30px;
    border-top: 1px solid #d2d2d7;
}

a {
    color: #0071e3;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

.lang-switch {
    text-align: right;
    margin-bottom: 20px;
    font-size: 14px;
}

@media (max-width: 600px) {
    body {
        padding: 12px;
    }

    .container {
        padding: 20px;
    }

    h1 {
        font-size: 28px;
    }

    h2 {
        font-size: 22px;
    }

    h3 {
        font-size: 18px;
    }
}