/* 全局基础重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* 圆角 */
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    
    /* 颜色 */
    --primary: #3b82f6;
    --primary-dark: #2563eb;
    --primary-light: #dbeafe;
    
    --accent: #6366f1;
    --accent-dark: #4f46e5;
    
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    
    /* 背景 */
    --bg: #f8fafc;
    --bg-alt: #f1f5f9;
    --surface: #ffffff;
    
    /* 文本 */
    --text: #0f172a;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    
    /* 边框 */
    --border: #e2e8f0;
    --border-light: #f1f5f9;
    
    /* 阴影 */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 8px -2px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 12px 24px -4px rgba(0, 0, 0, 0.08);
}

html, body {
    height: 100%;
    font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Text', 'Segoe UI', Roboto, 'PingFang SC', 'Microsoft YaHei', sans-serif;
    font-size: 14px;
    line-height: 1.6;
    color: var(--text);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    background: var(--bg);
}

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.2s ease;
}

a:hover {
    color: var(--primary);
}

ul, ol {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
    vertical-align: middle;
    display: block;
}

button, input, select, textarea {
    font-family: inherit;
    font-size: inherit;
    outline: none;
    border: none;
    background: transparent;
}

table {
    border-collapse: collapse;
    border-spacing: 0;
}