:root {
    /* 颜色系统 - 浅色主题 */
    --color-primary: #6750A4;
    --color-primary-container: #EADDFF;
    --color-secondary: #625B71;
    --color-secondary-container: #E8DEF8;
    --color-tertiary: #7D5260;
    --color-tertiary-container: #FFD8E4;
    --color-surface: #FFFBFE;
    --color-surface-variant: #E7E0EC;
    --color-background: #F3EDF7;
    --color-error: #B3261E;
    --color-error-container: #F9DEDC;
    --color-on-primary: #FFFFFF;
    --color-on-secondary: #FFFFFF;
    --color-on-tertiary: #FFFFFF;
    --color-on-surface: #1C1B1F;
    --color-on-surface-variant: #49454F;
    --color-on-error: #FFFFFF;
    
    /* 阴影 */
    --shadow-1: 0 1px 3px rgba(0,0,0,0.12), 0 1px 2px rgba(0,0,0,0.24);
    --shadow-2: 0 3px 6px rgba(0,0,0,0.16), 0 3px 6px rgba(0,0,0,0.23);
    --shadow-3: 0 10px 20px rgba(0,0,0,0.1), 0 6px 6px rgba(0,0,0,0.1);
    --shadow-4: 0 14px 28px rgba(0,0,0,0.12), 0 10px 10px rgba(0,0,0,0.1);
    
    /* 圆角 */
    --radius-small: 8px;
    --radius-medium: 12px;
    --radius-large: 16px;
    --radius-extra-large: 28px;
    --radius-full: 999px;
    
    /* 间距 */
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-5: 24px;
    --space-6: 32px;
    --space-7: 48px;
    --space-8: 64px;
    
    /* 动画时间 */
    --duration-short: 100ms;
    --duration-medium: 250ms;
    --duration-long: 500ms;
    --duration-extra-long: 1000ms;
    
    /* 字体 */
    --font-family: 'Roboto', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
    --font-weight-regular: 400;
    --font-weight-medium: 500;
    --font-weight-bold: 700;
    
    /* 毛玻璃模糊度 */
    --blur-amount: 10px;
}