.library .controls[hidden]{display:none!important}
.topics[hidden]{display:none!important}
:root{--song:"Noto Serif SC","Source Han Serif SC","Songti SC","STSong","SimSun",serif;--kai:"Kaiti SC","STKaiti","KaiTi","楷体",serif;--xing:"STXingkai","华文行楷","FZKai-Z03S","KaiTi","楷体",serif;--fang:"FangSong","STFangsong","仿宋",serif}
body{font-family:var(--song);letter-spacing:.015em}
.brand{font-family:Georgia,"Times New Roman",serif}.brand span,.eyebrow,nav,.meta,.material-meta,.material-tags,.tag,.stats span,.button,.search input,select{font-family:var(--sans)}
.hero{isolation:isolate;display:grid;grid-template-columns:minmax(0,800px) 1fr;grid-template-rows:1fr auto;align-items:center;background-image:linear-gradient(90deg,rgba(244,241,232,.99) 0%,rgba(244,241,232,.96) 34%,rgba(244,241,232,.58) 52%,rgba(244,241,232,.08) 72%),url("assets/academic-archive-hero-v1.webp");background-size:cover;background-position:center;border-bottom:1px solid rgba(124,105,75,.22);overflow:hidden}
.hero:before{content:"";position:absolute;inset:28px;border:1px solid rgba(124,105,75,.19);pointer-events:none;z-index:-1}
.hero:after{display:none}
.hero-copy{position:relative;z-index:1;max-width:790px}
.hero h1{font-family:var(--xing);font-weight:400;letter-spacing:.035em;font-size:clamp(48px,6.4vw,90px);line-height:1.25}
.hero h1 em{font-family:var(--kai);font-size:.82em;letter-spacing:.08em}
.intro{font-family:var(--fang);max-width:790px;font-size:18px;line-height:2.05;color:#4f5b54}
.hero-seal{position:absolute;right:4.5vw;top:72px;display:grid;grid-template-columns:1fr 1fr;background:rgba(139,54,38,.9);color:#f6efe1;font-family:var(--kai);font-size:15px;line-height:1;letter-spacing:.12em;padding:8px 7px;box-shadow:0 5px 18px rgba(53,31,20,.13);transform:rotate(2deg)}
.hero-seal span{writing-mode:vertical-rl;padding:2px}
.stats{grid-column:1 / -1;position:relative;z-index:1}
.stats strong{font-family:var(--kai);font-weight:500;font-size:34px}
.section-heading h2,.about h2,.material-category strong,.material-collection strong,.material-item h3,.paper h3,dialog h2{font-family:var(--kai);letter-spacing:.025em}
.section-heading h2,.about h2{font-size:42px}.material-category strong{font-size:23px}.material-collection strong{font-size:26px}.material-item h3{font-size:17px}.paper h3{font-size:22px}
.about{grid-template-columns:minmax(260px,.82fr) minmax(0,1.18fr);align-items:center;gap:clamp(38px,7vw,100px);background:#e9e5d9}
.about-visual{position:relative;margin:0;min-height:500px;overflow:hidden;background:#27251f;box-shadow:0 22px 55px rgba(46,39,29,.17)}
.about-visual:after{content:"";position:absolute;inset:14px;border:1px solid rgba(246,239,225,.35);pointer-events:none}
.about-visual img{width:100%;height:500px;display:block;object-fit:cover;object-position:center 62%;filter:saturate(.78) contrast(.96)}
.about-visual figcaption{position:absolute;left:0;right:0;bottom:0;display:flex;justify-content:space-between;gap:16px;padding:18px 25px;background:linear-gradient(transparent,rgba(19,18,15,.84));color:#f6efe1;font-family:var(--kai);font-size:15px;letter-spacing:.12em}
.about-visual figcaption span{font-family:var(--sans);font-size:9px;letter-spacing:.22em;align-self:end}
.about-copy{max-width:720px}.about p{font-family:var(--fang);font-size:17px;line-height:2.1}.about-motto{margin-top:32px;padding:18px 0 18px 24px;border-left:2px solid #8b3626;color:var(--green)!important;font-family:var(--kai)!important;font-size:20px!important;letter-spacing:.055em}
@media(max-width:780px){.hero{display:block;background-image:linear-gradient(90deg,rgba(244,241,232,.98) 0%,rgba(244,241,232,.92) 56%,rgba(244,241,232,.52) 100%),url("assets/academic-archive-hero-v1.webp");background-position:62% center}.hero:before{inset:16px}.hero-seal{right:22px;top:34px}.about{grid-template-columns:1fr}.about-visual,.about-visual img{height:430px;min-height:430px}.about-copy{max-width:none}}
@media(max-width:520px){.hero{background-image:linear-gradient(rgba(244,241,232,.92),rgba(244,241,232,.97)),url("assets/academic-archive-hero-v1.webp");background-position:70% center}.hero h1{font-size:46px;line-height:1.3;max-width:330px}.hero h1 em{font-size:.72em}.intro{font-size:16px;line-height:1.9}.section-heading h2,.about h2{font-size:34px}.hero-seal{font-size:12px;opacity:.9}.about-visual,.about-visual img{height:360px;min-height:360px}.about-visual figcaption{padding:16px 20px}.about-motto{font-size:18px!important}}
.recent-material .year{text-transform:uppercase;font-size:18px;letter-spacing:.08em}
.recent-material:focus{outline:1px solid var(--accent);outline-offset:2px}
.pdf-reader{margin:22px 0;border:1px solid var(--line);background:#e4e0d5;min-height:320px;overflow:hidden}
.pdf-toolbar{position:sticky;top:0;z-index:2;display:flex;align-items:center;justify-content:center;gap:14px;padding:10px;background:var(--card);border-bottom:1px solid var(--line)}
.pdf-toolbar button{appearance:none;border:1px solid var(--line);background:white;color:var(--ink);padding:8px 13px;cursor:pointer}
.pdf-toolbar button:disabled{opacity:.4;cursor:not-allowed}
.pdf-canvas-wrap{display:flex;justify-content:center;overflow:auto;padding:12px}
.pdf-canvas-wrap canvas{display:block;max-width:100%;height:auto!important;background:white;box-shadow:0 5px 24px rgba(0,0,0,.12)}
@media(max-width:520px){.pdf-reader{margin:16px -2px;min-height:260px}.pdf-toolbar{gap:8px}.pdf-toolbar button{padding:7px 10px}.pdf-canvas-wrap{padding:6px}}