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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f5f5;
    padding: 20px;
    max-width: 800px;
    margin: 0 auto;
}

.container {
    background: white;
    border-radius: 12px;
    padding: 30px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.page-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 8px;
    padding-bottom: 14px;
    border-bottom: 3px solid #134653;
}

.page-header h1 {
    border-bottom: none;
    padding-bottom: 0;
    margin-bottom: 4px;
}

.app-icon {
    width: 72px;
    height: 72px;
    border-radius: 16px;
    flex-shrink: 0;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.15);
}

.app-version {
    color: #666;
    font-size: 14px;
    margin-bottom: 20px;
}

h1 {
    color: #2c3e50;
    margin-bottom: 10px;
    font-size: 28px;
    border-bottom: 3px solid #134653;
    padding-bottom: 10px;
}

h2 {
    color: #34495e;
    margin-top: 30px;
    margin-bottom: 15px;
    font-size: 22px;
    border-left: 4px solid #134653;
    padding-left: 15px;
}

h3 {
    color: #555;
    margin-top: 20px;
    margin-bottom: 10px;
    font-size: 18px;
}

p {
    margin-bottom: 15px;
    text-align: justify;
}

ul, ol {
    margin-left: 25px;
    margin-bottom: 15px;
}

li {
    margin-bottom: 8px;
}

.section {
    margin-bottom: 30px;
}

.feature-box {
    background: #f8f9fa;
    border-left: 4px solid #134653;
    padding: 15px;
    margin: 15px 0;
    border-radius: 4px;
}

.tip {
    background: #e3f2fd;
    border-left: 4px solid #2196F3;
    padding: 15px;
    margin: 15px 0;
    border-radius: 4px;
    color: #000;
}

.warning {
    background: #fff3cd;
    border-left: 4px solid #ffc107;
    padding: 15px;
    margin: 15px 0;
    border-radius: 4px;
    color: #000;
}

.contact-box {
    background: #eef6f4;
    border-left: 4px solid #134653;
    padding: 15px;
    margin: 15px 0;
    border-radius: 4px;
}

code {
    background: #f4f4f4;
    padding: 2px 6px;
    border-radius: 3px;
    font-family: 'Courier New', monospace;
    font-size: 14px;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin: 15px 0 20px;
    font-size: 15px;
}

th, td {
    border: 1px solid #ddd;
    padding: 10px 12px;
    text-align: left;
}

th {
    background: #eef6f4;
    color: #134653;
    font-weight: 600;
}

.tab-icon {
    width: 20px;
    height: 20px;
    vertical-align: -4px;
    margin-right: 6px;
}

.footer-note {
    margin-top: 28px;
    padding-top: 16px;
    border-top: 1px solid #e0e0e0;
    color: #666;
    font-size: 14px;
    text-align: center;
}

@media (prefers-color-scheme: dark) {
    body {
        background-color: #121212;
        color: #e0e0e0;
    }

    .container {
        background: #1e1e1e;
    }

    h1, h2, h3 {
        color: #ffffff;
    }

    .app-version,
    .footer-note {
        color: #b0b0b0;
    }

    .feature-box,
    .contact-box {
        background: #2a2a2a;
    }

    .tip {
        background: #1a2836;
        color: #e0e0e0;
    }

    .warning {
        background: #3a3219;
        color: #e0e0e0;
    }

    code {
        background: #2a2a2a;
        color: #e0e0e0;
    }

    th {
        background: #2a3533;
        color: #8fd4c4;
    }

    td, th {
        border-color: #444;
    }

    .footer-note {
        border-top-color: #444;
    }
}