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

:root {
    --primary-light: #3B82F6;
    --primary-dark: #60A5FA;
    --primary-bg-light: #EFF6FF;
    --card-bg: #FFFFFF;
    --text-primary: #1A1A1A;
    --text-secondary: #666666;
    --text-tertiary: #999999;
    --border-color: #E5E7EB;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
}

html {
    font-size: 16px;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    background-color: #F5F7FA;
    color: var(--text-primary);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 680px;
    margin: 0 auto;
    padding: 16px;
    min-height: 100vh;
}

.header {
    text-align: center;
    padding: 32px 20px 28px;
    margin-bottom: 20px;
}

.logo {
    font-size: 26px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-light), var(--primary-dark));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 8px;
    letter-spacing: 1px;
}

.title {
    font-size: 22px;
    color: var(--text-primary);
    font-weight: 600;
    letter-spacing: 0.5px;
}

.subtitle {
    font-size: 13px;
    color: var(--text-tertiary);
    margin-top: 8px;
}

.content {
    padding: 0 4px;
}

.content h2 {
    font-size: 18px;
    color: var(--text-primary);
    margin: 28px 0 14px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 10px;
}

.content h2::before {
    content: '';
    width: 4px;
    height: 18px;
    background: linear-gradient(180deg, var(--primary-light), var(--primary-dark));
    border-radius: 2px;
}

.content h3 {
    font-size: 16px;
    color: var(--text-primary);
    margin: 20px 0 10px;
    font-weight: 500;
}

.content p {
    margin: 12px 0;
    color: var(--text-secondary);
    text-align: justify;
    line-height: 1.8;
}

.content ul, .content ol {
    margin: 14px 0;
    padding-left: 24px;
}

.content li {
    margin: 10px 0;
    color: var(--text-secondary);
    line-height: 1.7;
    position: relative;
}

.content strong {
    color: var(--text-primary);
    font-weight: 600;
}

.highlight {
    background: linear-gradient(135deg, #FFFBEB 0%, #FEF3C7 100%);
    padding: 16px;
    border-radius: var(--radius-md);
    margin: 20px 0;
    border: 1px solid #FDE68A;
}

.highlight p {
    color: #92400E;
    font-weight: 500;
    margin-bottom: 8px;
}

.highlight ul {
    margin: 0;
}

.highlight li {
    color: #A16207;
}

.notice {
    background: linear-gradient(135deg, #ECFDF5 0%, #D1FAE5 100%);
    padding: 16px;
    border-radius: var(--radius-md);
    margin: 20px 0;
    border: 1px solid #6EE7B7;
}

.notice p {
    color: #065F46;
    font-weight: 500;
    margin-bottom: 8px;
}

.notice ul {
    margin: 0;
}

.notice li {
    color: #047857;
}

.warning {
    background: linear-gradient(135deg, #FEF2F2 0%, #FEE2E2 100%);
    padding: 16px;
    border-radius: var(--radius-md);
    margin: 20px 0;
    border: 1px solid #FCA5A5;
}

.warning p {
    color: #991B1B;
    font-weight: 500;
    margin-bottom: 8px;
}

.warning ul {
    margin: 0;
}

.warning li {
    color: #B91C1C;
}

.footer {
    text-align: center;
    padding: 32px 20px 24px;
    margin-top: 40px;
    color: var(--text-tertiary);
    font-size: 13px;
}

.version-info {
    font-size: 12px;
    color: var(--text-tertiary);
    margin-top: 8px;
    letter-spacing: 0.5px;
}

@media (max-width: 480px) {
    .container {
        padding: 12px;
    }

    .header {
        padding: 28px 16px 24px;
    }

    .logo {
        font-size: 24px;
    }

    .title {
        font-size: 20px;
    }

    .content h2 {
        font-size: 17px;
        margin: 24px 0 12px;
    }

    .content h3 {
        font-size: 15px;
    }

    .content p {
        font-size: 15px;
        line-height: 1.75;
    }

    .content li {
        font-size: 15px;
    }

    .highlight, .notice, .warning {
        padding: 14px;
    }

    .footer {
        padding: 24px 16px 20px;
        margin-top: 32px;
    }
}

@media (prefers-color-scheme: dark) {
    body {
        background-color: #0F172A;
        color: #E2E8F0;
    }

    .container {
        background-color: #1E293B;
    }

    .title {
        color: #F1F5F9;
    }

    .content h2 {
        color: #F1F5F9;
    }

    .content h3 {
        color: #E2E8F0;
    }

    .content p {
        color: #94A3B8;
    }

    .content li {
        color: #94A3B8;
    }

    .content strong {
        color: #F1F5F9;
    }

    .version-info {
        color: #64748B;
    }

    .footer {
        color: #64748B;
    }
}