/* 背景与产品介绍站保持一致，装饰层不拦截页面操作。 */
:root{--bg:#f4f9ff}
body{background:#f4f9ff}
.site-ambient{position:fixed;inset:0;pointer-events:none;z-index:0;overflow:hidden}
.site-ambient-orb{position:absolute;border-radius:50%;filter:blur(80px);opacity:.45;animation:ambient-float 14s ease-in-out infinite}
.site-ambient-orb:nth-child(1){width:320px;height:320px;background:#2f6bff;top:-60px;right:-80px}
.site-ambient-orb:nth-child(2){width:260px;height:260px;background:#00c2ff;top:420px;left:-90px;animation-delay:-4s}
.site-ambient-orb:nth-child(3){width:200px;height:200px;background:#2f6bff;bottom:180px;right:-60px;animation-delay:-8s;opacity:.3}
main.container{position:relative;z-index:1}
header{background:rgba(244,249,255,.82);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border-bottom:1px solid rgba(255,255,255,.6)}
@keyframes ambient-float{0%,100%{transform:translateY(0) scale(1)}50%{transform:translateY(25px) scale(1.05)}}
@media(prefers-reduced-motion:reduce){.site-ambient-orb{animation:none}}
@media print{.site-ambient{display:none}body,header{background:white}header{backdrop-filter:none;-webkit-backdrop-filter:none}}