body.immersive-reader-open{overflow:hidden}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
#immersive-reader{position:fixed;inset:0;z-index:10000;display:grid;grid-template-rows:auto minmax(0,1fr) auto;background:#faf8f1;color:#283d33}
#immersive-reader[hidden]{display:none!important}
.immersive-reader-header{display:grid;grid-template-columns:48px minmax(0,1fr) auto;align-items:center;gap:16px;padding:16px clamp(16px,4vw,52px);border-bottom:1px solid #e1e5d8;background:#fffdf8}
.immersive-reader-close{width:44px;height:44px;border:1px solid #d8dfd2;border-radius:50%;background:#fff;color:#284e40;font-size:26px;line-height:1}
.immersive-reader-kicker{font-size:10px;letter-spacing:1.6px;text-transform:uppercase;color:#738074}
.immersive-reader-header h2{margin:4px 0 0;font-family:Georgia,"Noto Serif SC",serif;font-size:clamp(18px,2vw,24px);line-height:1.25;letter-spacing:0}
.immersive-reader-language{max-width:180px;border:1px solid #d7decd;border-radius:24px;background:#fffdf7;padding:9px 12px;color:#284e40;font-size:13px}
.immersive-reader-content{width:min(100%,1280px);min-height:0;margin:auto;padding:24px clamp(16px,5vw,64px) 28px;display:grid;grid-template-columns:minmax(0,1.1fr) minmax(280px,.9fr);align-items:center;gap:clamp(28px,5vw,72px);overflow:auto;overscroll-behavior:contain}
.immersive-reader-art{display:flex;align-items:center;justify-content:center;min-width:0;min-height:0}
.immersive-reader-art img{display:block;width:100%;max-height:calc(100dvh - 210px);object-fit:contain;border-radius:4px}
.immersive-reader-copy{max-width:56ch;margin:auto 0;font-family:Georgia,"Noto Serif SC","Songti SC",serif}
.immersive-reader-copy h3{margin:0 0 18px;font-family:system-ui,"Microsoft YaHei",sans-serif;font-size:12px;font-weight:600;letter-spacing:1px;color:#738074}
.immersive-reader-transcript{margin:0;white-space:pre-wrap;overflow-wrap:anywhere;font-size:clamp(20px,2.15vw,30px);line-height:1.72;color:#292d28}
.immersive-reader-empty{font-family:system-ui,"Microsoft YaHei",sans-serif;font-size:15px;line-height:1.8;color:#738074}
.immersive-reader-footer{padding:13px 18px calc(13px + env(safe-area-inset-bottom));border-top:1px solid #e1e5d8;background:#fffdf8}
.immersive-reader-controls{width:min(100%,620px);margin:auto;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:22px}
.immersive-reader-page{grid-column:1/-1;margin-bottom:-10px;text-align:center;font-size:12px;color:#738074}
.immersive-reader-control{min-height:52px;border:1px solid #d6dfd2;border-radius:28px;background:#f8f8f2;color:#284e40;padding:10px 18px;font-size:14px;font-weight:600}
.immersive-reader-control:disabled{opacity:.42}
.immersive-reader-control.next{justify-self:end}
.immersive-reader-play{width:58px;height:58px;border:0;border-radius:50%;background:#284e40;color:#fff;font-size:18px;box-shadow:0 7px 20px #284e4025}
.immersive-reader-progress{grid-column:1/-1;width:100%;height:4px;overflow:hidden;border-radius:9px;background:#e6e9df}
.immersive-reader-progress span{display:block;width:0;height:100%;background:#79946e;transition:width .2s ease}
@media(max-width:700px){
  .immersive-reader-header{grid-template-columns:42px minmax(0,1fr) auto;gap:10px;padding:12px 14px}
  .immersive-reader-close{width:40px;height:40px}
  .immersive-reader-language{max-width:122px;padding:8px 9px;font-size:12px}
  .immersive-reader-content{display:flex;flex-direction:column;align-items:stretch;justify-content:flex-start;gap:18px;padding:18px 18px 22px}
  .immersive-reader-art{flex:0 0 auto;width:100%;min-height:0}
  .immersive-reader-art img{width:100%;max-height:39dvh}
  .immersive-reader-copy{width:100%;max-width:58ch;margin:0 auto}
  .immersive-reader-copy h3{margin-bottom:9px}
  .immersive-reader-transcript{font-size:clamp(19px,5.5vw,23px);line-height:1.62}
  .immersive-reader-footer{padding:10px 14px calc(10px + env(safe-area-inset-bottom))}
  .immersive-reader-controls{gap:12px}
  .immersive-reader-control{min-height:46px;padding:9px 13px;font-size:12px}
  .immersive-reader-play{width:54px;height:54px}
}
@media(prefers-reduced-motion:reduce){.immersive-reader-progress span{transition:none}}