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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', sans-serif;
    background: #fff;
    line-height: 1.6;
    color: #333;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
}

.header {
    text-align: center;
    padding: 30px 20px;
    border-bottom: 1px solid #eee;
    margin-bottom: 24px;
}

.logo {
    font-size: 48px;
    margin-bottom: 12px;
}

.app-name {
    font-size: 24px;
    font-weight: 700;
    color: #333;
    margin-bottom: 8px;
}

.subtitle {
    font-size: 18px;
    color: #666;
}

.section {
    margin-bottom: 28px;
}

.update-date {
    text-align: center;
    color: #888;
    font-size: 14px;
    margin-bottom: 20px;
}

.intro {
    font-size: 15px;
    color: #555;
    text-align: justify;
    padding: 16px;
    border-left: 3px solid #333;
    background: #f9f9f9;
    margin-bottom: 24px;
}

.section-title {
    font-size: 17px;
    font-weight: 600;
    color: #333;
    margin-bottom: 12px;
}

.section-content {
    padding-left: 20px;
}

.section-content p {
    font-size: 15px;
    color: #555;
    margin-bottom: 10px;
    line-height: 1.8;
}

.contact-info {
    margin-top: 8px;
}

.contact-label {
    font-weight: 600;
    color: #333;
}

.contact-value {
    color: #555;
}

.footer {
    text-align: center;
    padding: 24px 20px;
    border-top: 1px solid #eee;
    margin-top: 24px;
}

.footer p {
    font-size: 14px;
    color: #666;
}

@media screen and (max-width: 480px) {
    .container {
        padding: 16px;
    }

    .logo {
        font-size: 40px;
    }

    .app-name {
        font-size: 20px;
    }

    .section-content {
        padding-left: 16px;
    }

    .section-content p {
        font-size: 14px;
    }
}