:root{
  --bg-page:#f4f2ed;--bg-white:#ffffff;--bg-card:#ffffff;--bg-accent:#eeebe4;
  --bg-dark:#1a1a2e;--bg-dark2:#232340;
  --red:#8b2332;--red-l:#a83245;--gold:#b8924a;--gold-l:#d4af6e;
  --c1:#1a1a2e;--c2:#3d3d56;--c3:#6b6b80;--c4:#9e9eb0;
  --cl:#e8e6f0;--bdr:rgba(26,26,46,.08);--bdr-d:rgba(255,255,255,.1);
  --ff:'Noto Sans SC','PingFang SC','Microsoft YaHei',sans-serif;
  --fe:'Inter','Helvetica Neue',sans-serif;
  --fd:'DM Serif Display',Georgia,serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;font-size:16px}
body{background:var(--bg-page);color:var(--c2);font-family:var(--ff);line-height:1.8;overflow-x:hidden}
[lang="en"] .zh{display:none!important}
[lang="zh-CN"] .en{display:none!important}

/* NAV */
nav{position:fixed;top:0;left:0;right:0;z-index:1000;background:rgba(255,255,255,.92);backdrop-filter:blur(20px) saturate(1.4);border-bottom:1px solid var(--bdr);transition:.4s}
nav.scrolled{background:rgba(255,255,255,.97);box-shadow:0 2px 24px rgba(0,0,0,.06)}
.ni{max-width:1240px;margin:0 auto;padding:0 48px;display:flex;align-items:center;justify-content:space-between;height:68px}
.nb{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--c1)}
.nl{width:36px;height:36px;background:var(--red);border-radius:6px;display:flex;align-items:center;justify-content:center;font-family:var(--fd);font-size:17px;font-weight:700;color:#fff}
.nbn{font-weight:700;font-size:15px;letter-spacing:2px;color:var(--c1)}
.nbs{font-family:var(--fe);font-size:10.5px;color:var(--c4);letter-spacing:1px;display:block;margin-top:-1px}
.nk{display:flex;gap:4px;list-style:none}
.nk a{display:block;padding:8px 16px;color:var(--c3);text-decoration:none;font-size:14px;font-weight:500;letter-spacing:.5px;border-radius:6px;transition:.25s}
.nk a:hover{color:var(--red);background:rgba(139,35,50,.04)}
.nk a.active{color:var(--red);font-weight:700}
.nk>li{position:relative}
.dropdown{display:none;position:absolute;top:100%;left:0;min-width:160px;background:#fff;border:1px solid var(--bdr);border-radius:8px;box-shadow:0 8px 24px rgba(0,0,0,.1);padding:8px 0;list-style:none;z-index:1000}
.has-dropdown:hover>.dropdown{display:block}
.dropdown li a{display:block;padding:8px 20px;color:var(--c3);font-size:13px;font-weight:400;white-space:nowrap;border-radius:0;transition:.2s}
.dropdown li a:hover{color:var(--red);background:rgba(139,35,50,.04)}
.nr{display:flex;align-items:center;gap:12px}
.nlg{font-size:12px;font-weight:600;color:var(--c3);border:1.5px solid var(--bdr);padding:5px 14px;border-radius:20px;cursor:pointer;transition:.3s;background:transparent;font-family:var(--fe)}
.nlg:hover{border-color:var(--red);color:var(--red)}
.nt{display:none;background:none;border:none;cursor:pointer;padding:8px}
.nt span{display:block;width:20px;height:2px;background:var(--c1);margin:5px 0;border-radius:1px}

/* HERO */
.hero{min-height:100vh;display:flex;align-items:center;position:relative;overflow:hidden;padding-top:68px;background:var(--bg-white)}
.hero-pat{position:absolute;inset:0;opacity:.02;background-image:repeating-linear-gradient(0deg,var(--c1) 0px,transparent 1px,transparent 100px),repeating-linear-gradient(90deg,var(--c1) 0px,transparent 1px,transparent 100px)}
.hi{position:relative;max-width:1240px;margin:0 auto;padding:80px 48px;display:grid;grid-template-columns:1fr 360px;gap:80px;align-items:center}
.hc{animation:fiu .9s ease both}
.hl{display:inline-flex;align-items:center;gap:10px;font-family:var(--fe);font-size:12px;font-weight:600;color:var(--red);letter-spacing:2px;text-transform:uppercase;margin-bottom:24px;opacity:0;animation:fiu .7s ease .15s both}
.hl::before{content:'';width:28px;height:2px;background:var(--red);border-radius:1px}
.hn{font-size:50px;font-weight:900;line-height:1.15;letter-spacing:5px;color:var(--c1);margin-bottom:6px;opacity:0;animation:fiu .7s ease .25s both}
.hne{font-family:var(--fd);font-size:26px;font-weight:400;font-style:italic;color:var(--c4);margin-bottom:28px;opacity:0;animation:fiu .7s ease .35s both}
.ht{font-size:16px;color:var(--c3);line-height:2;margin-bottom:12px;opacity:0;animation:fiu .7s ease .42s both}
.hm{font-size:14.5px;color:var(--c3);line-height:1.9;border-left:3px solid var(--red);padding-left:18px;margin:24px 0 32px;max-width:500px;font-style:italic;opacity:0;animation:fiu .7s ease .5s both}
.ha{display:flex;gap:14px;opacity:0;animation:fiu .7s ease .6s both}
.btn{display:inline-flex;align-items:center;gap:8px;padding:11px 26px;font-family:var(--ff);font-size:13.5px;font-weight:600;letter-spacing:.5px;border-radius:6px;text-decoration:none;transition:.3s;cursor:pointer;border:none}
.bp{background:var(--red);color:#fff}
.bp:hover{background:var(--red-l);transform:translateY(-2px);box-shadow:0 6px 20px rgba(139,35,50,.2)}
.bo{border:1.5px solid var(--c4);color:var(--c2);background:transparent}
.bo:hover{border-color:var(--red);color:var(--red)}
.hp{position:relative;opacity:0;animation:fiu .9s ease .3s both}
.hpf{width:320px;height:400px;border-radius:10px;overflow:hidden;box-shadow:0 20px 60px rgba(0,0,0,.1)}
.hpf img{width:100%;height:100%;object-fit:cover;object-position:center top}
.hpd{position:absolute;top:-10px;right:-10px;width:100%;height:100%;border:2px solid var(--red);border-radius:10px;z-index:-1;opacity:.15}
.hps{position:absolute;bottom:-24px;left:-24px;background:var(--bg-white);border:1px solid var(--bdr);border-radius:10px;padding:16px 24px;display:flex;gap:28px;box-shadow:0 8px 30px rgba(0,0,0,.06)}
.si{text-align:center}
.sn{font-family:var(--fd);font-size:26px;font-weight:700;color:var(--red);line-height:1}
.sl{font-size:11px;color:var(--c4);margin-top:4px;letter-spacing:1px}

/* SECTIONS */
.sx{max-width:1240px;margin:0 auto;padding:96px 48px}
.sh{text-align:center;margin-bottom:56px}
.slab{font-family:var(--fe);font-size:12px;font-weight:600;letter-spacing:3px;text-transform:uppercase;color:var(--red);margin-bottom:10px}
.st{font-size:30px;font-weight:700;letter-spacing:3px;color:var(--c1);margin-bottom:14px}
.sli{width:40px;height:3px;background:var(--red);margin:0 auto;border-radius:2px}

/* UPDATES */
.updates{background:var(--bg-page)}
.ug{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.uc{background:var(--bg-card);border:1px solid var(--bdr);border-radius:10px;padding:30px;transition:.3s;cursor:pointer;position:relative;overflow:hidden}
.uc::before{content:'';position:absolute;top:0;left:0;width:100%;height:3px;background:var(--red);transform:scaleX(0);transform-origin:left;transition:transform .4s}
.uc:hover{transform:translateY(-4px);box-shadow:0 12px 36px rgba(0,0,0,.06)}
.uc:hover::before{transform:scaleX(1)}
.utg{display:inline-block;font-family:var(--fe);font-size:10.5px;font-weight:700;letter-spacing:1.5px;color:var(--red);background:rgba(139,35,50,.06);padding:3px 10px;border-radius:4px;margin-bottom:14px}
.utt{font-size:16px;font-weight:700;line-height:1.6;margin-bottom:10px;color:var(--c1)}
.ue{font-size:13.5px;color:var(--c3);line-height:1.8;margin-bottom:14px}
.um{font-size:12px;color:var(--c4);font-family:var(--fe)}

/* INSIGHTS */
.insights{background:var(--bg-white)}
.il{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:start}
.if{background:var(--bg-card);border:1px solid var(--bdr);border-radius:10px;overflow:hidden;transition:.3s}
.if:hover{box-shadow:0 12px 36px rgba(0,0,0,.06)}
.ifi{height:200px;background:linear-gradient(135deg,var(--bg-accent),#e8e0d4);display:flex;align-items:center;justify-content:center;color:var(--c4);font-size:13px;overflow:hidden}
.ifb{padding:28px}
.ifb h3{font-size:18px;font-weight:700;line-height:1.5;margin-bottom:12px;color:var(--c1)}
.ifb p{font-size:14px;color:var(--c3);line-height:1.9}
.ils{display:flex;flex-direction:column;gap:16px}
.ii{display:flex;gap:18px;padding:20px;background:var(--bg-card);border:1px solid var(--bdr);border-radius:10px;transition:.3s;cursor:pointer}
.ii:hover{box-shadow:0 6px 20px rgba(0,0,0,.05);border-color:rgba(139,35,50,.15)}
.iin{font-family:var(--fd);font-size:34px;font-weight:700;color:rgba(139,35,50,.12);line-height:1;min-width:44px}
.iic h4{font-size:15px;font-weight:600;line-height:1.5;margin-bottom:4px;color:var(--c1)}
.iic p{font-size:13px;color:var(--c4);line-height:1.7}

/* RESEARCH */
.rp{background:var(--bg-dark);color:var(--cl)}
.rp .slab{color:var(--gold-l)}.rp .st{color:#fff}.rp .sli{background:var(--gold)}
.ra{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.rc{padding:32px;background:var(--bg-dark2);border:1px solid var(--bdr-d);border-radius:10px;transition:.35s;position:relative;overflow:hidden}
.rc::after{content:'';position:absolute;bottom:0;left:0;width:0;height:2px;background:var(--gold);transition:width .5s}
.rc:hover::after{width:100%}
.rc:hover{background:rgba(255,255,255,.06);border-color:rgba(255,255,255,.15)}
.ri{margin-bottom:18px;display:block;width:32px;height:32px;color:var(--gold-l)}.ri svg{width:100%;height:100%}
.rc h3{font-size:17px;font-weight:700;margin-bottom:6px;letter-spacing:1px;color:#fff}
.rc .es{font-family:var(--fe);font-size:11.5px;color:var(--gold-l);margin-bottom:12px;font-style:italic}
.rc p{font-size:13.5px;color:rgba(255,255,255,.6);line-height:1.8}

/* QUICK LINKS */
.ql{background:var(--bg-page)}
.qg{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.qa{display:flex;flex-direction:column;align-items:center;gap:12px;padding:32px 20px;background:var(--bg-card);border:1px solid var(--bdr);border-radius:10px;text-decoration:none;color:var(--c3);transition:.3s}
.qa:hover{border-color:rgba(139,35,50,.2);color:var(--red);transform:translateY(-3px);box-shadow:0 8px 24px rgba(0,0,0,.05)}
.qi{width:50px;height:50px;border-radius:12px;background:rgba(139,35,50,.04);border:1px solid var(--bdr);display:flex;align-items:center;justify-content:center;transition:.3s;color:var(--red)}.qi svg{width:24px;height:24px}
.qa:hover .qi{background:rgba(139,35,50,.08)}
.qn{font-size:13px;font-weight:600;letter-spacing:.5px}
.qs{font-size:11px;color:var(--c4);font-family:var(--fe)}

/* FOOTER */
footer{background:var(--bg-dark);color:rgba(255,255,255,.5)}
.fi{max-width:1240px;margin:0 auto;padding:56px 48px 32px}
.ft{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;margin-bottom:40px}
.fbn{color:#fff;font-weight:700;font-size:15px;letter-spacing:2px}
.fb p{font-size:13px;line-height:1.9;margin-top:14px;max-width:280px}
.fc-roles{margin-top:18px}
.fc-roles a{display:block;font-size:13px;color:rgba(255,255,255,.4);text-decoration:none;padding:4px 0;transition:.3s}
.fc h4{font-size:12px;font-weight:700;letter-spacing:2px;color:rgba(255,255,255,.7);margin-bottom:18px;text-transform:uppercase}
.fc a{display:block;font-size:13px;color:rgba(255,255,255,.4);text-decoration:none;padding:4px 0;transition:.3s}
.fc a:hover{color:var(--gold-l)}
.fbt{border-top:1px solid var(--bdr-d);padding-top:20px;text-align:center;font-size:12px;font-family:var(--fe)}

/* ANIMATIONS */
.sci{position:absolute;bottom:36px;left:50%;transform:translateX(-50%);display:flex;flex-direction:column;align-items:center;gap:8px;color:var(--c4);font-size:10px;letter-spacing:2px;font-family:var(--fe);font-weight:600;animation:fd 2s ease-in-out infinite}
.scl{width:1px;height:36px;background:linear-gradient(to bottom,var(--red),transparent)}
@keyframes fiu{from{opacity:0;transform:translateY(24px)}to{opacity:1;transform:translateY(0)}}
@keyframes fd{0%,100%{transform:translateX(-50%) translateY(0)}50%{transform:translateX(-50%) translateY(8px)}}
.rv{opacity:0;transform:translateY(20px);transition:opacity .6s,transform .6s}
.rv.v{opacity:1;transform:translateY(0)}

/* PAGE HERO (inner pages) */
.page-hero{padding-top:136px;padding-bottom:0;background:var(--bg-white)}
.page-body{background:var(--bg-page)}

/* ABOUT */
.about-grid{display:grid;grid-template-columns:300px 1fr;gap:60px;align-items:start}
.about-photo img{width:100%;border-radius:10px;box-shadow:0 12px 40px rgba(0,0,0,.1)}
.about-text h2{font-size:28px;font-weight:900;letter-spacing:3px;margin-bottom:8px}
.about-title{font-size:15px;color:var(--c3);margin-bottom:24px}
.about-bio{font-size:14.5px;line-height:2;color:var(--c2)}
.awards-section{margin-top:64px;padding-top:40px;border-top:1px solid var(--bdr)}
.awards-section h3{font-size:20px;font-weight:700;margin-bottom:24px;letter-spacing:2px}
.award-item{padding:12px 0;border-bottom:1px solid var(--bdr);display:flex;gap:16px;font-size:14px}
.award-year{font-family:var(--fe);font-weight:700;color:var(--red);min-width:50px}

/* PUBLICATIONS */
.pub-filter{display:flex;gap:8px;margin-bottom:32px;flex-wrap:wrap}
.pub-tag{display:inline-block;padding:6px 18px;border:1px solid var(--bdr);border-radius:20px;font-size:13px;text-decoration:none;color:var(--c3);transition:.3s}
.pub-tag:hover,.pub-tag.active{border-color:var(--red);color:var(--red);background:rgba(139,35,50,.04)}
.pub-list{display:flex;flex-direction:column;gap:16px}
.pub-card{background:var(--bg-card);border:1px solid var(--bdr);border-radius:10px;padding:28px;transition:.3s}
.pub-card:hover{box-shadow:0 6px 20px rgba(0,0,0,.05)}
.pub-type{display:inline-block;font-family:var(--fe);font-size:10px;font-weight:700;letter-spacing:1.5px;color:var(--red);background:rgba(139,35,50,.06);padding:2px 8px;border-radius:4px;margin-bottom:10px}
.pub-card h3{font-size:16px;font-weight:700;line-height:1.6;margin-bottom:6px;color:var(--c1)}
.pub-authors{font-size:13px;color:var(--c3);margin-bottom:4px}
.pub-meta{font-size:12px;color:var(--c4);margin-bottom:8px}
.pub-abstract{font-size:13px;color:var(--c3);line-height:1.8;margin-bottom:12px}
.pub-stats{display:flex;gap:16px;font-size:12px;font-family:var(--fe)}
.pub-stats a{color:var(--red);text-decoration:none}
.pub-stats a:hover{text-decoration:underline}

/* TEACHING / SERVICES */
.teach-section{margin-bottom:48px}
.teach-section h3{font-size:20px;font-weight:700;margin-bottom:20px;letter-spacing:1px;padding-bottom:12px;border-bottom:2px solid var(--red)}
.teach-card{background:var(--bg-card);border:1px solid var(--bdr);border-radius:10px;padding:24px;margin-bottom:12px;transition:.3s}
.teach-card:hover{box-shadow:0 4px 16px rgba(0,0,0,.04)}
.teach-card h4{font-size:15px;font-weight:700;margin-bottom:8px;color:var(--c1)}
.teach-content{font-size:13.5px;color:var(--c3);line-height:1.9}

/* CONTACT */
.contact-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:24px}
.contact-card{background:var(--bg-card);border:1px solid var(--bdr);border-radius:10px;padding:40px;text-align:center}
.contact-icon{width:36px;height:36px;margin-bottom:16px;color:var(--red)}.contact-icon svg{width:100%;height:100%}
.contact-card h3{font-size:16px;font-weight:700;margin-bottom:12px;color:var(--c1)}
.contact-card p{font-size:14px;color:var(--c3);line-height:1.8}

/* SUB-SECTIONS */
.sub-section{margin-bottom:56px}
.sub-section:last-child{margin-bottom:0}
.sub-header{display:flex;align-items:center;gap:16px;margin-bottom:28px;padding-bottom:16px;border-bottom:2px solid var(--red)}
.sub-num{font-family:var(--fd);font-size:24px;font-weight:700;color:var(--red);line-height:1;min-width:36px;width:36px;height:36px;border:2px solid var(--red);border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:15px}
.sub-header h3{font-size:20px;font-weight:700;letter-spacing:1px;color:var(--c1)}
.placeholder-box{background:var(--bg-card);border:1px dashed var(--bdr);border-radius:10px;padding:48px;text-align:center;color:var(--c4);font-size:14px;line-height:1.8}
.page-content{background:var(--bg-card);border:1px solid var(--bdr);border-radius:10px;padding:32px;font-size:14.5px;line-height:2;color:var(--c2)}

.empty-state{text-align:center;padding:60px;color:var(--c4);font-size:14px}

/* RESPONSIVE */
@media(max-width:1024px){
  .hi{grid-template-columns:1fr;gap:40px}.hp{display:flex;justify-content:center;order:-1}.hpf{width:260px;height:320px}.hn{font-size:38px}
  .ug,.ra{grid-template-columns:repeat(2,1fr)}.qg{grid-template-columns:repeat(2,1fr)}.ft{grid-template-columns:1fr 1fr}
  .about-grid{grid-template-columns:1fr;gap:32px}.about-photo img{max-width:300px}
}
@media(max-width:768px){
  .ni{padding:0 24px}.nk{display:none}.nt{display:block}
  .nk.open{display:flex;flex-direction:column;position:absolute;top:68px;left:0;right:0;background:#fff;border-bottom:1px solid var(--bdr);padding:12px 24px;z-index:999}
  .nk.open .dropdown{display:none;position:static;box-shadow:none;border:none;background:transparent;padding:0 0 0 16px;min-width:auto}
  .nk.open .has-dropdown.sub-open>.dropdown{display:block}
  .nk.open .dropdown li a{font-size:13px;padding:6px 12px;color:var(--c4)}
  .sx{padding:64px 24px}.hi{padding:40px 24px}.hn{font-size:32px;letter-spacing:3px}
  .ug,.il,.ra{grid-template-columns:1fr}.qg{grid-template-columns:1fr 1fr}.ft{grid-template-columns:1fr}.fbt{flex-direction:column;gap:8px;text-align:center}
}