/* Cormorant Garamond — Google Fonts, SIL OFL, 免费商用 ✅ */
/* Futura — 系统字体引用，上线需购买 Futura PT 网页授权 */
@font-face{font-family:'Futura Display';src:local('Futura Medium'),local('Futura-Medium'),local('Futura');font-weight:500;font-display:swap}
@font-face{font-family:'Futura Display';src:local('Futura Bold'),local('Futura-Bold');font-weight:700;font-display:swap}
@font-face{font-family:'Futura Display';src:local('Futura Condensed Medium'),local('Futura-CondensedMedium');font-weight:500;font-stretch:condensed;font-display:swap}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}

:root{
  --bg:#000;--wall:#000;
  --gold:#c9a96e;--lemon:#f0dc50;--text:#ede8e0;--dim:rgba(237,232,224,.4);
  --border:rgba(201,169,110,.15);
  --ease:cubic-bezier(.76,0,.24,1);
  --futura:'Futura Display','Futura','Jost','Century Gothic','Avenir',sans-serif;
}

html,body{width:100%;height:100%;overflow:hidden;background:var(--bg);color:var(--text);font-family:'Noto Serif SC','Songti SC',serif;-webkit-font-smoothing:antialiased}

/* 英文/数字全部用 Futura */
.room-num,.room-en,.entry-hero-en,.entry-hero-sub,.entry-hero-by,.entry-btn,.frames-label,.lang-btn,.ui-counter,.loader-pct,.loader-title,.overlay-text-en,.overlay-text-by,.overlay-text-num,.overlay-close-hint,.entry-hint,.kbd-key,.ov-close,.nav-arrow-inner,.fullscreen-btn,.room-read-full{font-family:var(--futura)}

/* 英文模式下标题和描述也用 Futura */
html[lang="en"] .room-title,html[lang="en"] .overlay-text-title{font-family:'Bodoni Moda','Jost','Noto Serif SC',serif;font-weight:400;font-style:italic;letter-spacing:-.02em;font-feature-settings:"liga" 1,"dlig" 1}
html[lang="en"] .room-desc,html[lang="en"] .overlay-text-body{font-family:var(--futura)}

.noise{position:fixed;inset:0;z-index:9999;pointer-events:none;opacity:.02;background-image:url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E")}

/* ===== 加载 ===== */
.loader{position:fixed;inset:0;z-index:1000;background:#000;display:flex;flex-direction:column;align-items:center;justify-content:center;transition:opacity .8s ease,visibility .8s ease}
.loader.done{opacity:0;visibility:hidden;pointer-events:none}
.loader-logo{height:80px;filter:brightness(0) invert(1);opacity:.15;margin-bottom:40px;transition:opacity 2s ease}
.loader-logo.bright{opacity:.8}
.loader-bar{width:320px;height:1px;background:rgba(201,169,110,.15);position:relative;overflow:hidden}
.loader-fill{height:100%;background:var(--gold);width:0%;transition:width .3s ease}
.loader-pct{font-size:14px;letter-spacing:.3em;color:var(--dim);margin-top:20px;font-variant-numeric:tabular-nums}

/* ===== 入场 ===== */
.entry{position:fixed;inset:0;z-index:100;display:flex;align-items:center;justify-content:center;transition:opacity 1.2s ease,visibility 1.2s ease;background:#000}
.entry-bg{position:absolute;inset:0;background:url('../assets/covers/entry-bg.jpg') center/cover no-repeat;opacity:.3;z-index:0;min-height:100vh;min-width:100vw}
.entry.gone{opacity:0;visibility:hidden;pointer-events:none}
.entry-video{position:absolute;inset:0;width:100%;height:100%;min-height:100vh;min-width:100vw;object-fit:cover;filter:brightness(.4) saturate(.65)}
.entry-overlay{position:absolute;inset:0;background:radial-gradient(ellipse at center,rgba(6,6,6,.15) 0%,rgba(6,6,6,.7) 100%)}

.entry-content{position:relative;z-index:2;text-align:center;padding:40px;max-width:800px}

/* 巨大英文排版 */
.entry-hero-en{font-family:'Bodoni Moda','Jost','Noto Serif SC',serif;font-size:clamp(56px,11vw,130px);font-weight:400;font-style:italic;line-height:.88;letter-spacing:-.03em;color:rgb(240,220,80);text-align:left;opacity:0;animation:fadeUp 1s ease .2s forwards;font-feature-settings:"liga" 1,"dlig" 1}
.entry-hero-calligraphy{width:clamp(120px,20vw,240px);filter:brightness(0) invert(1);margin-top:36px;opacity:0;animation:fadeUpDim .8s ease .6s forwards;display:block;align-self:flex-start}
@keyframes fadeUpDim{from{opacity:0;transform:translateY(18px)}to{opacity:.9;transform:translateY(0)}}
.entry-hero-line{width:60px;height:1px;background:var(--gold);margin:32px 0;opacity:0;animation:fadeUp .6s ease .9s forwards}
.entry-logo-museum{position:absolute;top:24px;left:28px;height:36px;filter:brightness(0) invert(1);z-index:10;opacity:0;animation:fadeUpFull .8s ease .5s forwards}
@keyframes fadeUpFull{from{opacity:0;transform:translateY(18px)}to{opacity:1;transform:translateY(0)}}
@keyframes fadeUpToPoint{from{opacity:0;transform:translateY(18px)}to{opacity:.7;transform:translateY(0)}}
.entry-logo-studio{position:absolute;bottom:32px;right:32px;height:22px;filter:brightness(0) invert(1);z-index:10;opacity:0;animation:fadeUp .8s ease 1.2s forwards}

.entry-btn{display:inline-flex;align-items:center;gap:10px;padding:14px 52px;border:none;border-radius:28px;background:rgba(240,220,80,.12);color:var(--lemon);font-size:11px;letter-spacing:.3em;cursor:pointer;font-family:var(--futura);transition:all .3s ease;opacity:0;animation:fadeUp .8s ease 1.6s forwards;margin-top:36px;align-self:flex-start;backdrop-filter:blur(8px)}
.entry-btn svg{width:14px;height:14px;transition:transform .3s ease}
.entry-btn:hover{background:rgba(240,220,80,.2)}
.entry-btn:hover svg{transform:translateX(4px)}

.entry-hint{position:absolute;bottom:48px;left:0;right:0;text-align:center;font-size:8px;letter-spacing:.5em;text-transform:uppercase;color:rgba(201,169,110,.2);opacity:0;animation:fadeUp .8s ease 2.2s forwards,breathe 3s ease-in-out 3s infinite}

@keyframes fadeUp{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}
@keyframes breathe{0%,100%{opacity:.25}50%{opacity:.5}}

/* ===== 展厅（渐隐切换，不再横移） ===== */
/* 总览页 */
.overview{position:fixed;inset:0;z-index:90;background:#000;display:flex;align-items:center;justify-content:center;opacity:0;visibility:hidden;transition:opacity .8s ease,visibility .8s ease;padding:20px}
.overview.active{opacity:1;visibility:visible}
.overview-grid{display:grid;grid-template-columns:repeat(4,1fr);grid-template-rows:repeat(4,1fr);gap:4px;width:100%;height:100%}
.overview-cell{position:relative;overflow:hidden;cursor:pointer;border-radius:2px}
.overview-cell img{width:100%;height:100%;object-fit:cover;filter:brightness(.25) blur(1.5px);transition:filter .5s ease,transform .5s ease}
.overview-cell:hover img{filter:brightness(.65) blur(0px);transform:scale(1.05)}
.overview-cell .ov-label{position:absolute;top:10px;left:10px;right:8px;bottom:10px;font:400 italic clamp(20px,2.9vw,34px)/1.1 'Bodoni Moda','Noto Serif SC','Jost',serif;letter-spacing:-.02em;color:var(--lemon);opacity:.85;transition:opacity .4s ease;text-shadow:0 2px 18px rgba(0,0,0,.85);font-feature-settings:"liga" 1,"dlig" 1;word-break:break-word;hyphens:none;display:flex;align-items:flex-start;justify-content:flex-start}
.overview-cell:hover .ov-label{opacity:1}
.overview-cell.ov-hero{grid-column:2/4;grid-row:2/4}
.overview-cell.ov-hero img{filter:brightness(.45) blur(0px)}
.overview-cell.ov-hero:hover img{filter:brightness(.75) blur(0px);transform:scale(1.03)}
.overview-cell.ov-hero .ov-label{font-size:clamp(26px,4.5vw,45px);opacity:1;top:14px;left:14px;right:14px;align-items:flex-start}

/* 视频加载前的模糊封面 + 播放提示 */
.video-poster-blur{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;filter:blur(12px) brightness(.6);transition:opacity .8s ease;z-index:2}
.video-poster-blur.hidden{opacity:0;pointer-events:none}
.video-play-hint{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:60px;height:60px;border-radius:50%;background:rgba(255,255,255,.15);backdrop-filter:blur(8px);display:flex;align-items:center;justify-content:center;font-size:20px;color:rgba(255,255,255,.7);z-index:3;transition:opacity .6s ease;pointer-events:none}
.video-play-hint.hidden{opacity:0}
/* 视频淡入 */

.hall{position:fixed;inset:0;overflow:hidden}

.room{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:var(--wall);overflow:hidden;opacity:0;visibility:hidden;transition:opacity .7s ease,visibility .7s ease;z-index:1}
.room.active{opacity:1;visibility:visible;z-index:2}

/* 磨砂背景 */
.room-blur-bg{position:absolute;inset:-60px;width:calc(100% + 120px);height:calc(100% + 120px);object-fit:cover;filter:blur(80px) brightness(.3) saturate(.5);opacity:0;transition:opacity 1.4s ease;pointer-events:none;z-index:0}
.room.active .room-blur-bg{opacity:1}

/* 光晕 */
.room-glow{position:absolute;inset:0;opacity:0;transition:opacity 1.2s ease .1s;pointer-events:none;z-index:1}
.room.active .room-glow{opacity:1}

/* 作品容器 */
.artwork-wrap{position:relative;z-index:2;display:flex;align-items:center;gap:52px;max-width:96vw;max-height:92vh;opacity:0;transform:scale(.97);transition:opacity .6s ease .15s,transform .6s var(--ease) .15s}
.room.active .artwork-wrap{opacity:1;transform:scale(1)}

/* 媒体 */
.artwork-media{position:relative;flex-shrink:0;display:flex;align-items:center;justify-content:center}

.artwork-media video,
.artwork-media img.artwork-img{
  max-height:82vh;width:auto;max-width:50vw;object-fit:contain;
  box-shadow:none;border:none;outline:none;background:transparent;display:block
}
.room.landscape .artwork-media video,
.room.landscape .artwork-media img.artwork-img{max-height:68vh;max-width:72vw}
video::-webkit-media-controls{display:none!important}
video{background:transparent!important}

/* 全屏按钮 */
.media-inner{position:relative;display:inline-flex;align-items:center;justify-content:center}
.fullscreen-btn{position:absolute;bottom:8px;right:8px;width:32px;height:32px;border:1px solid rgba(255,255,255,.12);border-radius:8px;background:rgba(255,255,255,.08);color:rgba(255,255,255,.8);cursor:pointer;display:flex;align-items:center;justify-content:center;opacity:0;transition:all .25s ease;backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);z-index:3}
.media-inner:hover .fullscreen-btn{opacity:1}
.fullscreen-btn:hover{opacity:1!important;border-color:var(--lemon);color:var(--lemon)}
.fullscreen-btn svg{width:16px;height:16px}

/* 右侧文字 */
.room-text{max-width:360px;opacity:0;transform:translateX(20px);transition:opacity .55s ease .25s,transform .55s var(--ease) .25s}
.room.active .room-text{opacity:1;transform:translateX(0)}

.room-num{font-size:10px;letter-spacing:.4em;color:var(--lemon);display:block;margin-bottom:16px}
.room-title{font-size:clamp(26px,3.2vw,44px);font-weight:300;letter-spacing:.06em;line-height:1.2;color:var(--lemon)}
.room-en{font-size:12px;letter-spacing:.12em;color:rgba(240,220,80,.4);margin-top:10px;display:block;font-family:'Bodoni Moda','Jost','Noto Serif SC',serif;font-style:italic}
.room-divider{width:24px;height:1px;background:var(--lemon);margin:16px 0;opacity:.4}
.room-desc{font-size:13px;line-height:2.1;color:rgba(240,220,80,.45);letter-spacing:.04em}
.room-read-full{font-size:9px;color:var(--lemon);letter-spacing:.2em;margin-top:14px;cursor:pointer;transition:all .3s;display:inline-flex;align-items:center;gap:4px;padding:0;background:none;border:none;border-bottom:1px solid rgba(240,220,80,.4);padding-bottom:3px}
.room-read-full::after{content:'▾';font-size:8px;opacity:.7}
.room-read-full:hover{border-bottom-color:var(--lemon)}

/* 氛围背景图 — 禁用，纯黑 */
.room-atmos,.room-blur-bg,.room-glow{display:none!important}
/* dot 悬停缩略图预览 */
.dot{position:relative}
.dot-preview{position:absolute;bottom:20px;left:50%;transform:translateX(-50%) translateY(6px);opacity:0;visibility:hidden;transition:all .25s ease;pointer-events:none;display:flex;flex-direction:column;align-items:center;gap:4px;z-index:300}
.dot:hover .dot-preview{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0)}
.dot-preview img{width:80px;height:60px;object-fit:cover;border-radius:3px;box-shadow:0 4px 16px rgba(0,0,0,.6);border:1px solid rgba(201,169,110,.2)}
.dot-preview span{font-size:8px;letter-spacing:.1em;color:var(--dim);white-space:nowrap}

/* ===== 左右导航箭头（大、显眼） ===== */
.nav-arrow{position:fixed;top:0;bottom:0;z-index:50;width:80px;display:flex;align-items:center;justify-content:center;cursor:pointer;opacity:0;visibility:hidden;transition:opacity .4s ease;background:transparent}
.nav-arrow.on{opacity:1;visibility:visible}
.nav-arrow-l{left:0}
.nav-arrow-r{right:0}

.nav-arrow-inner{width:48px;height:48px;border:1px solid var(--border);border-radius:50%;background:rgba(6,6,6,.3);color:rgba(237,232,224,.4);display:flex;align-items:center;justify-content:center;transition:all .3s ease;backdrop-filter:blur(6px)}
.nav-arrow-inner svg{width:18px;height:18px}
.nav-arrow-inner{border-color:rgba(240,220,80,.15);color:rgba(240,220,80,.4)}
.nav-arrow:hover .nav-arrow-inner{border-color:var(--lemon);color:var(--lemon);background:rgba(6,6,6,.6);transform:scale(1.1)}

/* 左右两侧悬停热区高亮 */
.nav-arrow::before{content:'';position:absolute;inset:0;background:linear-gradient(to right,rgba(201,169,110,.03),transparent);opacity:0;transition:opacity .3s ease}
.nav-arrow-r::before{background:linear-gradient(to left,rgba(201,169,110,.03),transparent)}
.nav-arrow:hover::before{opacity:1}

/* 初始导航提示（脉冲动画） */
.nav-arrow.pulse .nav-arrow-inner{animation:arrowPulse 2s ease-in-out 3}
@keyframes arrowPulse{0%,100%{border-color:var(--border);transform:scale(1)}50%{border-color:var(--gold);transform:scale(1.12)}}

/* ===== 顶部 UI ===== */
.ui-top{position:fixed;top:0;left:0;right:0;z-index:200;padding:18px 28px;display:flex;align-items:center;gap:16px;opacity:0;visibility:hidden;transition:opacity .5s ease}
.ui-top.on{opacity:1;visibility:visible}
.ui-top.dim{opacity:.15}
.ui-top.dim:hover{opacity:1}

.ui-exit{background:none;border:none;color:var(--dim);font-size:14px;cursor:pointer;font-family:inherit;transition:color .2s;flex-shrink:0}
.ui-exit:hover{color:var(--lemon)}
.ui-logo{height:36px;filter:brightness(0) invert(1);opacity:1;margin-right:4px;cursor:pointer;flex-shrink:0}
.ui-title{white-space:nowrap;display:flex;align-items:center;overflow:hidden;flex-shrink:1;min-width:0}
.ui-title-logo{height:16px;filter:brightness(0) invert(1);opacity:.8}
.ui-spacer{flex:1}
.ui-counter{display:none}
#ui-cur{color:var(--text)}
.ui-slash{margin:0 4px}

/* 语言 */
.lang-switch{display:flex;gap:2px}
.lang-btn{background:none;border:1px solid transparent;color:var(--dim);font-size:10px;letter-spacing:.1em;padding:5px 10px;cursor:pointer;font-family:inherit;transition:all .2s;border-radius:2px}
.lang-btn:hover{color:var(--text);border-color:var(--border)}
.lang-btn.active{color:var(--lemon);border-color:rgba(240,220,80,.4)}

/* ===== 进度条 ===== */
.progress-bar{position:fixed;bottom:0;left:0;right:0;z-index:200;height:2px;background:rgba(201,169,110,.08);opacity:0;visibility:hidden;transition:opacity .5s ease}
.progress-bar.on{opacity:1;visibility:visible}
.progress-fill{height:100%;background:var(--lemon);transition:width .6s var(--ease);opacity:.6}

/* 圆点 */
.dots{position:fixed;bottom:20px;left:50%;transform:translateX(-50%);z-index:200;display:flex;gap:5px;align-items:center;opacity:0;visibility:hidden;transition:opacity .5s}
.dots.on{opacity:1;visibility:visible}
.dot{width:4px;height:4px;border-radius:50%;background:rgba(240,220,80,.2);cursor:pointer;transition:all .3s ease}
.dot.active{background:var(--lemon);transform:scale(1.6)}
.dot:hover{background:rgba(240,220,80,.5)}

/* ===== 全文阅读层 ===== */
.overlay-text{position:fixed;inset:0;z-index:500;background:rgba(6,6,6,.97);display:none;overflow-y:auto;backdrop-filter:blur(12px)}
.overlay-text.on{display:block}
.overlay-text-inner{max-width:640px;padding:60px 40px;margin:0 auto}
.overlay-text-cover{width:100%;aspect-ratio:21/9;object-fit:cover;margin-bottom:36px;opacity:.8;border:none}
.overlay-top-bar{display:flex;align-items:center;margin-bottom:32px;position:relative}
.overlay-top-bar .overlay-lang-switch{position:absolute;right:0;top:50%;transform:translateY(-50%)}
.overlay-lang-switch{display:flex;gap:2px}
.overlay-lang-switch .lang-btn{background:none;border:1px solid transparent;color:var(--dim);font-size:10px;letter-spacing:.1em;padding:5px 10px;cursor:pointer;font-family:var(--futura);transition:all .2s;border-radius:2px}
.overlay-lang-switch .lang-btn:hover{color:var(--text);border-color:var(--border)}
.overlay-lang-switch .lang-btn.active{color:var(--lemon);border-color:rgba(240,220,80,.4)}
.overlay-text-logo{height:33px;filter:brightness(0) invert(1);opacity:.7;cursor:pointer;transition:opacity .2s}
.overlay-text-logo:hover{opacity:.9}
.overlay-feiyidashang-logo{height:28px;cursor:default;opacity:.5;position:absolute;left:50%;transform:translateX(-50%)}
.overlay-text-close{position:fixed;top:24px;right:32px;background:none;border:none;color:var(--dim);font-size:18px;cursor:pointer;transition:color .2s;z-index:501}
.overlay-text-close:hover{color:var(--lemon)}

/* 社交链接 左下角 */
.social-links{position:fixed;bottom:20px;left:24px;z-index:150;display:flex;gap:8px;align-items:center;opacity:0;visibility:hidden;transition:opacity .5s;height:18px}
.social-links.on{opacity:1;visibility:visible}
.social-icon{display:flex;align-items:center;justify-content:center;text-decoration:none;width:20px;height:20px;border-radius:0;background:none;border:none;transition:all .25s ease;position:relative}
.social-icon:hover{background:none}
.social-icon svg{width:18px;height:18px;flex-shrink:0}
.social-svg-icon{width:20px;height:20px;flex-shrink:0;filter:brightness(0) invert(1);opacity:.7;transition:opacity .2s}
.social-icon:hover .social-svg-icon{opacity:1}
.social-icon span{font-family:var(--futura);font-size:8px;letter-spacing:.1em;position:absolute;bottom:100%;left:50%;transform:translateX(-50%);white-space:nowrap;background:rgba(0,0,0,.7);backdrop-filter:blur(8px);padding:3px 8px;border-radius:4px;color:rgba(255,255,255,.7);opacity:0;pointer-events:none;transition:opacity .2s;margin-bottom:6px}
.social-icon:hover span{opacity:1}

/* tudou_studio 常驻右下角 */
.studio-watermark{position:fixed;bottom:20px;right:24px;z-index:150;height:18px;filter:brightness(0) invert(1);opacity:.9;pointer-events:none;transition:opacity .5s}
.overlay-text-num{font-size:9px;letter-spacing:.4em;color:var(--lemon);margin-bottom:16px}
.overlay-text-title{font-size:clamp(28px,4vw,42px);font-weight:200;letter-spacing:.08em;color:var(--lemon);line-height:1.3}
.overlay-text-en{font-family:'Bodoni Moda',serif;font-size:13px;letter-spacing:.12em;color:var(--dim);font-style:italic;margin-top:8px}
.overlay-text-divider{width:40px;height:1px;background:var(--gold);margin:28px 0;opacity:.4}
.overlay-text-body{font-size:14px;line-height:2.4;color:rgba(237,232,224,.6);letter-spacing:.05em;white-space:pre-line}
.overlay-text-by{font-size:10px;letter-spacing:.2em;color:rgba(240,220,80,.3);margin-top:40px;padding-top:20px;border-top:1px solid rgba(240,220,80,.1)}

/* ===== About 页面 ===== */
.overlay-about{position:fixed;inset:0;z-index:600;background:rgba(0,0,0,.98);display:none;overflow-y:auto;backdrop-filter:blur(16px)}
.overlay-about.on{display:block}
.overlay-about-close{position:fixed;top:24px;right:32px;background:none;border:none;color:var(--dim);font-size:18px;cursor:pointer;transition:color .2s;z-index:601}
.overlay-about-close:hover{color:var(--lemon)}
.overlay-about-inner{max-width:580px;padding:80px 40px;margin:0 auto}
.about-photo{width:100%;aspect-ratio:21/9;object-fit:cover;margin-bottom:40px;opacity:.8;border-radius:4px}
.about-logo{height:32px;filter:brightness(0) invert(1);opacity:.6}
.about-name{font-family:'Bodoni Moda',serif;font-size:clamp(36px,5vw,56px);font-weight:400;font-style:italic;color:var(--lemon);line-height:1.2;letter-spacing:-.02em}
.about-name-cn{font-family:'Noto Serif SC',serif;font-size:clamp(20px,3vw,28px);color:rgba(240,220,80,.85);letter-spacing:.1em}
.about-divider{width:40px;height:1px;background:var(--lemon);margin:28px 0;opacity:.3}
.about-tagline{font-family:var(--futura);font-size:12px;letter-spacing:.15em;color:rgba(240,220,80,.8);margin-bottom:32px}
.about-body{font-size:14px;line-height:2.2;color:rgba(237,232,224,.85);letter-spacing:.04em}
.about-body p{margin-bottom:20px}
.about-quote{font-style:italic;color:var(--lemon);opacity:.85;border-left:2px solid rgba(240,220,80,.5);padding-left:16px;margin-top:28px}
.about-links{margin-top:40px;padding-top:20px;border-top:1px solid rgba(240,220,80,.1);display:flex;gap:24px}
.about-links a{font-family:var(--futura);font-size:11px;letter-spacing:.15em;color:var(--lemon);opacity:.4;text-decoration:none;transition:opacity .2s}
.about-links a:hover{opacity:1}

/* Entry actions row */
.entry-actions{display:flex;gap:16px;align-items:center;opacity:0;animation:fadeUp .8s ease 1.6s forwards;margin-top:8px}
.entry-actions .entry-btn{opacity:1;animation:none;margin-top:0}
.entry-btn-about{background:transparent!important;color:rgba(255,255,255,.4)!important;padding:14px 24px!important;font-size:10px!important;letter-spacing:.2em!important;border:1px solid rgba(255,255,255,.1)!important}
.entry-btn-about:hover{background:rgba(255,255,255,.06)!important;color:rgba(255,255,255,.7)!important}

/* ===== 全屏预览 ===== */
.overlay-img{position:fixed;inset:0;z-index:500;background:rgba(3,3,3,.97);display:none;align-items:center;justify-content:center;cursor:zoom-out;backdrop-filter:blur(8px)}
.overlay-img.on{display:flex}
.overlay-img img{max-width:92vw;max-height:92vh;object-fit:contain;animation:zoomIn .3s ease}
.overlay-close-hint{position:absolute;bottom:30px;left:50%;transform:translateX(-50%);font-size:9px;letter-spacing:.2em;color:var(--dim);opacity:.3}
@keyframes zoomIn{from{opacity:0;transform:scale(.95)}to{opacity:1;transform:scale(1)}}

.overlay-vid{position:fixed;inset:0;z-index:400;background:rgba(3,3,3,.98);display:none;align-items:center;justify-content:center;backdrop-filter:blur(8px)}
.overlay-vid.on{display:flex}
.overlay-vid video{max-width:94vw;max-height:94vh;width:auto;height:auto}
.ov-close{position:absolute;top:22px;right:28px;background:none;border:none;color:var(--dim);font-size:18px;cursor:pointer;transition:color .2s}
.ov-close:hover{color:var(--gold)}

/* 键盘提示 */
.kbd-hint{position:fixed;bottom:50px;left:50%;z-index:250;transform:translateX(-50%);display:flex;gap:20px;align-items:center;opacity:0;transition:opacity .6s ease;pointer-events:none}
.kbd-hint.on{opacity:1}
.kbd-hint.fade{opacity:0}
.kbd-key{font-size:9px;letter-spacing:.15em;color:var(--dim);display:flex;align-items:center;gap:6px}
.kbd-key kbd{display:inline-block;padding:3px 8px;border:1px solid var(--border);border-radius:3px;font-family:inherit;font-size:9px;color:var(--gold)}

/* ===== 移动端 ===== */
@media(max-width:768px){
  .artwork-wrap{flex-direction:column;gap:12px;justify-content:center}
  .artwork-media{width:100%;display:flex;justify-content:center}
  .artwork-media video,.artwork-media img.artwork-img{max-height:42vh;max-width:90vw;width:auto;height:auto}
  .room.landscape .artwork-media video,.room.landscape .artwork-media img.artwork-img{max-width:92vw;max-height:35vh}
  .room-text{max-width:88vw;text-align:center}
  .room-divider{margin:8px auto}
  .room-desc{font-size:12px;line-height:1.6;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;text-overflow:ellipsis}
  .room-title{font-size:clamp(22px,5vw,28px)}
  .room-cn{font-size:clamp(12px,3vw,16px)}
  .room-num{font-size:10px}
  .room-read-full{font-size:8px;padding:6px 18px;margin-top:8px}

  .nav-arrow{width:50px}
  .nav-arrow-inner{width:36px;height:36px}
  .nav-arrow-inner svg{width:14px;height:14px}

  .kbd-hint{display:none}
  .entry-hint{bottom:28px}
  .ui-top{padding:10px 12px;position:fixed}
  .ui-top.dim{opacity:1}
  .ui-logo{height:29px;opacity:1}
  .entry-logo-museum{height:29px;top:14px;left:14px}
  .ui-title{display:flex;position:absolute;left:50%;transform:translateX(-50%)}
  .ui-title-logo{display:block;height:14px;opacity:.7}
  .lang-switch,.overlay-lang-switch{position:relative}
  .lang-switch .lang-btn,.overlay-lang-switch .lang-btn{display:none;font-size:9px;padding:3px 6px}
  .lang-switch .lang-btn.active,.overlay-lang-switch .lang-btn.active{display:block}
  .dot{width:5px;height:5px;transition:all .3s ease}
  .dot.dot-hidden{display:none}

  .social-links{bottom:14px;left:12px;gap:6px}
  .social-svg-icon{width:14px;height:14px}
  .studio-watermark{height:14px;bottom:14px;right:12px}

  .overview{padding:6px}
  .overview-grid{grid-template-columns:repeat(3,1fr);gap:3px}
  .overview-cell.ov-hero{grid-column:1/3;grid-row:2/4}
  .overview-cell .ov-label{font-size:clamp(10px,3vw,16px);top:8px;left:8px}
  .overview-cell.ov-hero .ov-label{font-size:clamp(16px,5vw,24px);bottom:12px;left:12px}
}