*,*:before,*:after{margin:0;padding:0;box-sizing:border-box}:root{--color-primary: #4f46e5;--color-primary-light: #818cf8;--color-primary-dark: #3730a3;--color-success: #10b981;--color-warning: #f59e0b;--color-danger: #ef4444;--color-info: #3b82f6;--color-text: #1f2937;--color-text-secondary: #6b7280;--color-text-placeholder: #9ca3af;--color-border: #e5e7eb;--color-bg: #f9fafb;--color-bg-white: #ffffff;--spacing-xs: 4px;--spacing-sm: 8px;--spacing-md: 16px;--spacing-lg: 24px;--spacing-xl: 32px;--radius-sm: 6px;--radius-md: 10px;--radius-lg: 16px;--radius-full: 9999px;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .05);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .1);--shadow-lg: 0 10px 25px -3px rgba(0, 0, 0, .1);--font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;--font-size-xs: 12px;--font-size-sm: 14px;--font-size-base: 16px;--font-size-lg: 18px;--font-size-xl: 20px;--font-size-2xl: 24px}html{font-size:16px;-webkit-text-size-adjust:100%}body{font-family:var(--font-sans);font-size:var(--font-size-base);color:var(--color-text);background-color:var(--color-bg);line-height:1.6;-webkit-font-smoothing:antialiased}a{color:var(--color-primary);text-decoration:none}img{max-width:100%;height:auto;display:block}button{cursor:pointer;font-family:inherit;font-size:inherit;border:none;outline:none}input,textarea,select{font-family:inherit;font-size:inherit;outline:none}.btn{display:inline-flex;align-items:center;justify-content:center;padding:10px 20px;font-weight:500;border-radius:var(--radius-md);transition:all .2s ease}.btn-primary{background:var(--color-primary);color:#fff}.btn-primary:active{background:var(--color-primary-dark);transform:scale(.98)}.btn-block{width:100%}.card{background:var(--color-bg-white);border-radius:var(--radius-md);padding:var(--spacing-md);box-shadow:var(--shadow-sm)}