/* 默认浅色风格 */
body{background:var(--bg);--card:#ffffff;--link-text:#1f2430;--card-line:rgba(15,23,42,.08);--icon-bg:rgba(245,247,251,.9);--arrow:#98a2b3;}
body::after{content:"";position:fixed;inset:0;pointer-events:none;z-index:0;background:linear-gradient(180deg,rgba(255,255,255,.45),rgba(255,255,255,0) 46%);}