/* 三个页面只保留静态装饰，底色继续由各页管理；所有装饰均位于内容后方，不接收鼠标操作。 */
[data-background-scene]{position:relative;isolation:isolate}
.page-atmosphere{position:absolute;inset:0;z-index:-1;pointer-events:none;overflow:clip;contain:paint}
.page-atmosphere *{pointer-events:none}
.atmosphere-unit{position:absolute}

/* 关于页保留两块低透明度几何面，固定位置与亮度，不随鼠标、滚动或时间变化。 */
.placeholder-view .ph-about[data-background-scene]::after{display:none}
.atmosphere-plane{width:88%;height:820px;right:-24%;top:-80px}
.atmosphere-plane-secondary{width:82%;height:1000px;left:-29%;right:auto;top:47%}
.atmosphere-plane .atmosphere-surface{position:absolute;inset:0;opacity:.7;clip-path:polygon(30% 0,100% 8%,78% 100%,0 79%);background:linear-gradient(137deg,#aecfff24,#4c83c51c 52%,#24528b04 88%)}
.atmosphere-plane-secondary .atmosphere-surface{clip-path:polygon(0 13%,66% 0,100% 81%,25% 100%);background:linear-gradient(145deg,#8dbbf71c,#417bc41a 57%,transparent 88%)}

/* 联系页只保留宽幅柔光，维持已经确认的蓝色层次，填写表单时背景也保持稳定。 */
.contact-view .ct-page[data-background-scene]::before{display:none}
.atmosphere-wash{width:110%;height:70%;right:-30%;top:-12%}
.atmosphere-wash .atmosphere-surface{position:absolute;inset:0;opacity:.55;background:radial-gradient(ellipse at 56% 35%,#4b82c735,#2e579d14 44%,transparent 72%)}

/* 开放弧线复用现有装饰素材，仅作背景示意；移除沿线流动的亮段，保留淡线构图。 */
.unified-custom #main .technical-section[data-background-scene]::after{display:none}
.unified-custom #main .technical-section[data-background-scene]::before{opacity:.32}
.atmosphere-field{width:84%;height:100%;right:-22%;top:-4%;mask-image:linear-gradient(90deg,transparent,#000 34%,#000 82%,transparent);-webkit-mask-image:linear-gradient(90deg,transparent,#000 34%,#000 82%,transparent)}
.atmosphere-field svg{display:block;width:100%;height:100%;overflow:visible}
.atmosphere-field-base{fill:none;stroke:#9cc5f8;stroke-width:1;stroke-opacity:.22;vector-effect:non-scaling-stroke}
.structure-section .atmosphere-field{right:auto;left:-22%;transform:scaleX(-1)}

/* 手机收窄装饰并降低强度，继续使用静态背景。 */
@media(max-width:800px){
  .atmosphere-plane{width:135%;height:620px;right:-80%;top:20px}
  .atmosphere-plane-secondary{width:140%;height:760px;left:-95%;top:49%}
  .atmosphere-plane .atmosphere-surface{opacity:.65}
  .atmosphere-wash{width:170%;height:42%;right:-80%;top:-5%;opacity:.65}
  .atmosphere-field{width:125%;right:-70%;opacity:.65}
  .structure-section .atmosphere-field{left:-70%;right:auto}
}
@media print{.page-atmosphere{display:none}}