/* Background comparisons share the same Discuz layout and original masthead. */
html[data-bian-style]{--bian-art:none;--bian-art-position:center top;--bian-art-size:100% auto}
html[data-bian-style] body{background:#09090b!important;isolation:isolate}
/* Preserve the original generated colors, with no dimming or saturation filter. */
html[data-bian-style] body::before{content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;background-image:var(--bian-art);background-position:var(--bian-art-position);background-size:var(--bian-art-size);background-repeat:no-repeat}
html[data-bian-style="shore"]{--bian-art:url(scenes/balanced/shore.webp)}
html[data-bian-style="haunting"]{--bian-art:url(scenes/balanced/haunting.webp)}
html[data-bian-style="midnight"]{--bian-art:url(scenes/balanced/midnight.webp)}
html[data-bian-style="bulu"]{--bian-art:url(scenes/balanced/bulu.webp)}
html[data-bian-style="campus"]{--bian-art:url(scenes/balanced/campus.webp)}
html[data-bian-style="urban"]{--bian-art:url(scenes/balanced/urban.webp)}
html[data-bian-style="scene"]{--bian-art:url(folk-page-background.webp)}
html[data-bian-style="signal"]{--bian-art:url(analog-red-background-v2.webp);--bian-art-size:cover}
html[data-bian-style="grid"]{--bian-art:url(ornaments/lantern.webp),url(ornaments/talismans.webp),url(ornaments/paper-doll.webp),url(ornaments/flowers.webp),url(ornaments/talismans.webp),url(ornaments/lantern.webp);--bian-art-position:left 2vw top 48px,right 1.4vw top 100px,left 2.8vw top 400px,right 1.2vw bottom 24px,left 1vw bottom 20px,right 4vw top 390px;--bian-art-size:160px auto,170px auto,150px auto,185px auto,110px auto,100px auto}
.bian-collage{display:none;position:fixed;inset:27px 0 0;pointer-events:none;overflow:hidden;z-index:0}
html[data-bian-style="collage"] .bian-collage{display:block}
.bian-collage-edge{position:absolute;top:0;bottom:0;width:max(0px,calc((100% - 996px)/2));overflow:hidden}
.bian-collage-left{left:0}.bian-collage-right{right:0}
.bian-collage img{position:absolute;height:auto;max-width:none;user-select:none}
.bian-collage-left .ornament-lantern{width:300px;left:-95px;top:-100px;transform:rotate(-19deg);opacity:.8}
.bian-collage-left .ornament-talismans{width:180px;left:53px;top:172px;transform:rotate(23deg);opacity:.52}
.bian-collage-left .ornament-flowers{width:335px;left:-125px;bottom:-89px;transform:rotate(-34deg);opacity:.6}
.bian-collage-right .ornament-flowers{width:295px;right:-155px;top:-114px;transform:rotate(147deg);opacity:.44}
.bian-collage-right .ornament-talismans{width:150px;right:20px;bottom:260px;transform:rotate(-28deg);opacity:.37}
.bian-collage-right .ornament-paper-doll{width:275px;right:-85px;bottom:-88px;transform:rotate(12deg);opacity:.7}
.bian-style-preview{position:fixed;right:12px;bottom:12px;z-index:1000;font:12px/1.6 Tahoma,"SimSun",serif;color:#d8bfc8;background:#170f14;border:1px solid #805061;box-shadow:2px 2px 0 #000;max-width:calc(100vw - 24px)}
.bian-style-preview summary{padding:7px 12px;cursor:pointer;list-style:disclosure-closed}
.bian-style-preview[open] summary{list-style:disclosure-open;border-bottom:1px solid #54323f}
.bian-style-options{padding:9px;width:252px;max-height:65vh;overflow-y:auto}.bian-style-options p{font-size:11px;color:#ab8f9b;margin:0 0 8px}
.bian-style-options button{display:inline-block;vertical-align:top;width:120px;margin:2px;padding:6px 0;cursor:pointer;background:#271923;border:1px solid #684354;color:#d8bfc8;font:12px "SimSun",serif}
.bian-style-options button img{display:block;width:108px;height:32px;object-fit:cover;margin:0 auto 6px}
.bian-scene-original{display:block;margin:8px 2px 2px;text-align:center;text-decoration:underline}.bian-scene-original[hidden]{display:none}
.bian-style-options button[aria-pressed="true"]{background:#653346;color:#fff;border-color:#c18a9d;box-shadow:inset 1px 1px #b07788}
.bian-style-options button:focus-visible,.bian-style-preview summary:focus-visible{outline:2px solid #f1b3c7;outline-offset:2px}
@media(max-width:1200px){.bian-collage-left .ornament-talismans{left:-30px}.bian-collage-right .ornament-paper-doll{right:-142px}}
@media(max-width:1000px){.bian-collage{display:none!important}html[data-bian-style] body::before{display:none}}