:root{
  --navy:#15499A;
  --navy-dark:#15499A;
  --blue:#15499A;
  --ink:#1e2937;
  --muted:#65758b;
  --line:#d9e1ea;
  --soft:#f6f9fc;
  --paper:#ffffff;
  --max:1120px;
  --radius:16px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  color:var(--ink);
  background:#fff;
  line-height:1.72;
  font-size:16px;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.site-header{
  position:sticky;top:0;z-index:30;
  background:#15499A;
  border-bottom:1px solid #15499A;
  box-shadow:0 8px 22px rgba(21,73,154,.16);
}
.navbar{
  width:min(var(--max),calc(100% - 42px));
  margin:0 auto;
  min-height:66px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:22px;
  flex-wrap:nowrap;
}
.brand{display:flex;align-items:center;gap:12px;min-width:360px;flex:0 0 auto}
.brand-text{display:block;min-width:0}
.brand-row{display:flex;align-items:center;gap:14px;white-space:nowrap}
.sysu-logo{height:30px;width:auto;max-width:182px;object-fit:contain;display:block;flex:0 0 auto;}
.logo-mark{display:none}
.brand-title{display:block;font-size:18px;font-weight:800;color:#fff;line-height:1.18}
.brand-sub{display:none}
.nav-links{display:flex;align-items:center;justify-content:flex-end;gap:4px;flex-wrap:nowrap;white-space:nowrap;flex:0 1 auto}
.nav-links a{
  padding:8px 8px;
  color:rgba(255,255,255,.9);
  border-radius:10px;
  font-size:13px;
  line-height:1.2;
  white-space:nowrap;
  font-weight:650;
}
.nav-links a:hover,.nav-links a.active{background:rgba(255,255,255,.16);color:#fff}
.menu-btn{display:none;border:1px solid rgba(255,255,255,.35);background:rgba(255,255,255,.08);color:#fff;border-radius:10px;padding:8px 10px;font-weight:700}
.hero{
  background:linear-gradient(180deg,#f8fbfe 0%,#ffffff 82%);
  border-bottom:1px solid var(--line);
}
.hero-inner{
  width:min(var(--max),calc(100% - 42px));
  margin:0 auto;
  padding:64px 0 56px;
  display:grid;
  grid-template-columns:1.22fr .78fr;
  gap:46px;
  align-items:center;
}
.kicker{color:var(--blue);font-size:13px;letter-spacing:.12em;text-transform:uppercase;font-weight:800;margin-bottom:13px}
h1{font-size:44px;line-height:1.15;margin:0 0 18px;color:var(--navy-dark);letter-spacing:-.02em}
.hero p,.page-hero p{font-size:18px;color:#4b5c70;margin:0;max-width:760px}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:26px}
.btn{display:inline-flex;align-items:center;justify-content:center;border-radius:10px;padding:11px 16px;font-weight:800;border:1px solid transparent;font-size:14px}
.btn.primary{background:var(--navy);color:#fff}.btn.secondary{background:#fff;color:var(--navy);border-color:var(--line)}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-top:30px}
.stat{background:#fff;border:1px solid var(--line);border-radius:14px;padding:15px 14px}.stat strong{display:block;font-size:23px;color:var(--navy);line-height:1.1}.stat span{font-size:13px;color:var(--muted)}
.portrait-card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:14px;min-height:400px;display:flex;align-items:center;justify-content:center;overflow:hidden}
.pi-photo{width:100%;height:370px;object-fit:contain;object-position:center;background:#fff;border-radius:14px;border:1px solid var(--line)}
.photo-fallback{display:none;width:100%;height:370px;border-radius:14px;background:#eef4f9;align-items:center;justify-content:center;text-align:center;color:var(--navy);font-size:20px;font-weight:800;letter-spacing:.08em}
.section{width:min(var(--max),calc(100% - 42px));margin:0 auto;padding:58px 0}.section.tight{padding:38px 0}.section.compact{padding-top:34px}
.section-head{margin-bottom:24px;display:flex;align-items:flex-end;justify-content:space-between;gap:20px}.section-title{margin:0;color:var(--navy-dark);font-size:29px;line-height:1.25;letter-spacing:-.01em}.section-desc{margin:8px 0 0;color:var(--muted);font-size:15px;max-width:820px}
.grid{display:grid;gap:18px}.grid.two{grid-template-columns:repeat(2,1fr)}.grid.three{grid-template-columns:repeat(3,1fr)}
.card{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:22px}.card h3{margin:0 0 10px;color:var(--navy);font-size:20px}.card p{margin:0;color:#43566b}.card ul{margin:12px 0 0;padding-left:20px;color:#43566b}.card li{margin:7px 0}
.split{display:grid;grid-template-columns:.9fr 1.1fr;gap:28px;align-items:start}.info-list{display:grid;gap:0;border-top:1px solid var(--line)}.info-item{display:grid;grid-template-columns:145px 1fr;gap:14px;padding:13px 0;border-bottom:1px solid var(--line)}.info-item b{color:var(--navy)}.info-item span{color:#40536a}.timeline{border-left:2px solid #d7e4ef;padding-left:20px;display:grid;gap:16px}.time-item{position:relative;border:1px solid var(--line);border-radius:14px;padding:16px;background:#fff}.time-item:before{content:"";position:absolute;left:-27px;top:23px;width:11px;height:11px;border-radius:50%;background:var(--blue)}.time-item b{color:var(--navy)}
.page-hero{background:#f8fbfe;border-bottom:1px solid var(--line)}.page-hero .section{padding:48px 0}.breadcrumb{font-size:13px;color:var(--muted);margin-bottom:12px}.breadcrumb a{color:var(--navy);font-weight:700}
.notice{background:var(--navy);color:#fff;border-radius:18px;padding:30px}.notice h2{margin:0 0 10px;font-size:28px}.notice p{margin:0;color:rgba(255,255,255,.84)}.notice .btn{margin-top:18px;background:#fff;color:var(--navy)}
.footer{background:#0b2740;color:#fff;margin-top:46px}.footer-inner{width:min(var(--max),calc(100% - 42px));margin:0 auto;padding:32px 0;display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap}.footer p{margin:4px 0;color:rgba(255,255,255,.72);font-size:14px}.footer b{color:#fff}
.table-wrap{overflow:auto;border:1px solid var(--line);border-radius:14px;background:#fff}table{border-collapse:collapse;width:100%;min-width:820px}th,td{padding:12px 14px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}th{background:#f3f7fb;color:var(--navy);font-weight:800;font-size:14px}td{color:#40536a;font-size:14px}.callout{border-left:4px solid var(--blue);background:#f6faff;border-radius:12px;padding:16px 18px;color:#40536a}
/* Publications + projects page: quieter, denser, more formal */
.anchor-nav{display:flex;gap:10px;flex-wrap:wrap;margin-top:24px}.anchor-nav a{border:1px solid var(--line);background:#fff;border-radius:10px;padding:9px 12px;color:var(--navy);font-weight:750;font-size:14px}.anchor-nav a:hover{background:#eef4f9}
.pub-layout{display:grid;grid-template-columns:1fr 280px;gap:28px;align-items:start}.side-panel{position:sticky;top:92px;border:1px solid var(--line);border-radius:14px;background:#fff;padding:18px}.side-panel h3{margin:0 0 12px;color:var(--navy);font-size:17px}.side-panel a{display:block;padding:8px 0;border-top:1px solid var(--line);color:#43566b;font-weight:650}.side-panel a:first-of-type{border-top:0}.pub-list{display:grid;gap:12px;margin:0;padding:0;list-style:none;counter-reset:pub}.pub{counter-increment:pub;display:grid;grid-template-columns:46px 1fr;gap:15px;border:1px solid var(--line);border-radius:14px;background:#fff;padding:17px 18px}.pub:before{content:counter(pub);width:34px;height:34px;border-radius:9px;background:#eef4f9;color:var(--navy);display:flex;align-items:center;justify-content:center;font-weight:800}.pub-title{font-weight:760;color:#1f2f43;line-height:1.62}.pub-title em{font-style:normal;color:var(--navy);font-weight:850}.pub-meta{margin-top:8px;display:flex;gap:8px;flex-wrap:wrap}.tag{display:inline-flex;align-items:center;border-radius:999px;background:#f1f6fb;color:var(--navy);padding:3px 9px;font-size:12px;font-weight:800}.tag.year{background:#eef7f0;color:#2f6846}.tag.journal{background:#f5f2ff;color:#58408c}.pub-note{font-size:13px;color:var(--muted);margin-top:12px}.projects-grid{display:grid;gap:12px}.project-card{border:1px solid var(--line);border-radius:14px;background:#fff;padding:17px 18px;display:grid;grid-template-columns:1fr auto;gap:12px}.project-title{font-weight:800;color:#1f2f43}.project-meta{margin-top:6px;color:#52667c;font-size:14px}.project-badges{display:flex;gap:8px;align-items:flex-start;flex-wrap:wrap;justify-content:flex-end;min-width:145px}.badge{display:inline-flex;border-radius:999px;padding:4px 9px;font-size:12px;font-weight:800;background:#f1f6fb;color:var(--navy);white-space:nowrap}.badge.active{background:#eef7f0;color:#2f6846}.badge.done{background:#f8f1ef;color:#8a4b38}.badge.role{background:#eef4f9;color:#284963}.subsection-title{font-size:24px;color:var(--navy-dark);margin:0 0 14px}.subsection-lead{color:var(--muted);margin:0 0 20px;max-width:820px}.divider{height:1px;background:var(--line);margin:42px 0}


/* Research page contribution blocks */
.research-page{padding-top:50px}
.research-intro{margin-bottom:10px}
.research-feature{
  display:grid;
  grid-template-columns:minmax(0,.92fr) minmax(420px,1.08fr);
  gap:30px;
  align-items:center;
  padding:34px 0;
  border-top:1px solid var(--line);
}
.research-feature:first-of-type{border-top:0;padding-top:22px}
.research-feature.reverse .research-copy{order:2}
.research-feature.reverse .research-figure{order:1}
.research-copy{padding:4px 0}
.research-index{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:38px;
  height:30px;
  border-radius:999px;
  background:#eef4f9;
  color:var(--navy);
  font-weight:850;
  font-size:13px;
  letter-spacing:.04em;
  margin-bottom:12px;
}
.research-copy h2{
  margin:0 0 14px;
  color:var(--navy-dark);
  font-size:25px;
  line-height:1.28;
  letter-spacing:-.01em;
}
.research-copy p{margin:0 0 13px;color:#40536a;line-height:1.78}
.research-copy p:last-child{margin-bottom:0}
.research-copy em{color:var(--navy);font-style:normal;font-weight:760}
.research-figure{
  margin:0;
  border:1px solid var(--line);
  border-radius:18px;
  overflow:hidden;
  background:#fff;
  box-shadow:0 14px 36px rgba(18,57,91,.07);
}
.research-figure img{
  width:100%;
  aspect-ratio:4/3;
  object-fit:cover;
  background:#fff;
}
.research-figure figcaption{
  border-top:1px solid var(--line);
  padding:10px 14px;
  color:var(--muted);
  font-size:13px;
  line-height:1.45;
  background:#fbfdff;
}


/* Member page */
.member-section{padding-top:42px}
.member-lead{max-width:820px;color:var(--muted);margin:8px 0 0}
.member-list{display:grid;gap:26px;margin-top:24px}
.member-card{
  display:grid;
  grid-template-columns:260px 1fr;
  gap:30px;
  align-items:start;
  padding:0 0 28px;
  border-bottom:1px solid var(--line);
}
.member-card:last-child{border-bottom:0;padding-bottom:0}
.member-photo-wrap{
  width:260px;
  aspect-ratio:1/1;
  border:1px solid var(--line);
  background:#f7fafc;
  overflow:hidden;
  display:flex;
  align-items:center;
  justify-content:center;
}
.member-photo{
  width:100%;
  height:100%;
  object-fit:cover;
  display:block;
}
.member-photo-placeholder{
  width:100%;
  height:100%;
  display:flex;
  align-items:center;
  justify-content:center;
  color:var(--navy);
  font-weight:800;
  letter-spacing:.08em;
  background:#eef4f9;
}
.member-info{padding-top:4px}
.member-info h3{margin:0 0 4px;color:var(--ink);font-size:22px;line-height:1.25}
.member-position{margin:0 0 8px;color:var(--navy);font-weight:800}
.member-email{margin:0 0 16px;color:#23364d;font-size:17px;word-break:break-word}
.member-info p{margin:0 0 10px;color:#2f4054;line-height:1.76}
.member-info .muted{color:var(--muted)}
.member-note{border-left:4px solid var(--navy);background:#f6faff;border-radius:12px;padding:14px 16px;color:#40536a;margin-top:20px}

@media (max-width:960px){
  .research-feature,.research-feature.reverse{grid-template-columns:1fr;gap:18px;padding:28px 0}
  .research-feature.reverse .research-copy,.research-feature.reverse .research-figure{order:initial}
  .research-copy h2{font-size:22px}
}

@media (max-width:960px){.menu-btn{display:block}.nav-links{display:none;position:absolute;left:21px;right:21px;top:66px;background:#15499A;border:1px solid rgba(255,255,255,.25);border-radius:14px;padding:10px}.nav-links.open{display:grid}.hero-inner,.grid.two,.grid.three,.split,.pub-layout{grid-template-columns:1fr}.side-panel{position:static;order:-1}.stats{grid-template-columns:repeat(2,1fr)}h1{font-size:34px}.section-title{font-size:26px}.info-item{grid-template-columns:1fr;gap:4px}.project-card{grid-template-columns:1fr}.project-badges{justify-content:flex-start}}
@media (max-width:540px){.navbar,.section,.hero-inner,.footer-inner{width:min(100% - 26px,var(--max))}.brand{display:flex;align-items:center;gap:12px;min-width:360px;flex:0 0 auto}
.brand-text{display:block;min-width:0}
.brand-row{display:flex;align-items:center;gap:14px;white-space:nowrap}
.sysu-logo{height:30px;width:auto;max-width:182px;object-fit:contain;display:block;flex:0 0 auto;}.brand-sub{display:none}.stats{grid-template-columns:1fr}.pub{grid-template-columns:1fr}.pub:before{width:30px;height:30px}.btn{width:100%}.hero-actions{display:grid}.pi-photo,.photo-fallback{height:320px}}

@media (max-width:540px){.sysu-logo{height:24px;max-width:132px;}.brand{min-width:auto}.brand-row{gap:9px}.brand-title{font-size:16px}}


@media (max-width:760px){
  .member-card{grid-template-columns:1fr;gap:16px}
  .member-photo-wrap{width:100%;max-width:320px}
  .member-info h3{font-size:20px}
}


/* Group photos on Member page */
.group-photo-section{padding-top:34px}
.group-photo-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:28px 30px;
  margin-top:24px;
}
.group-photo-card{
  background:#fff;
  border:1px solid var(--line);
  border-radius:16px;
  overflow:hidden;
}
.group-photo-wrap{
  width:100%;
  aspect-ratio:16/10;
  background:#f7fafc;
  display:flex;
  align-items:center;
  justify-content:center;
  border-bottom:1px solid var(--line);
}
.group-photo{
  width:100%;
  height:100%;
  object-fit:cover;
  display:block;
}
.group-photo-placeholder{
  width:100%;
  height:100%;
  display:flex;
  align-items:center;
  justify-content:center;
  background:#eef4f9;
  color:var(--navy);
  font-weight:800;
  letter-spacing:.06em;
}
.group-photo-caption{
  min-height:58px;
  padding:14px 16px;
  color:#40536a;
  font-size:15px;
  line-height:1.65;
  background:#fff;
}

@media (max-width:760px){
  .group-photo-grid{grid-template-columns:1fr;gap:20px}
}


/* News page */
.news-section{padding-top:42px}
.news-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:28px;
  margin-top:24px;
}
.news-card{
  background:#fff;
  border:1px solid var(--line);
  border-radius:16px;
  overflow:hidden;
}
.news-photo-wrap{
  width:100%;
  aspect-ratio:16/10;
  background:#f7fafc;
  display:flex;
  align-items:center;
  justify-content:center;
  border-bottom:1px solid var(--line);
}
.news-photo{
  width:100%;
  height:100%;
  object-fit:cover;
  display:block;
}
.news-photo-placeholder{
  width:100%;
  height:100%;
  display:flex;
  align-items:center;
  justify-content:center;
  background:#eef4f9;
  color:var(--navy);
  font-weight:800;
  letter-spacing:.06em;
}
.news-caption{
  min-height:52px;
  padding:13px 16px;
  margin:0;
  color:#40536a;
  font-size:15px;
  line-height:1.6;
  background:#fff;
}

@media (max-width:760px){
  .news-grid{grid-template-columns:1fr;gap:20px}
}

/* News page - left text and right stacked scroll gallery */
.news-scroll-list{
  display:grid;
  grid-template-columns:1fr;
  gap:32px;
  margin-top:24px;
}
.news-scroll-card{
  display:grid;
  grid-template-columns:minmax(260px, .86fr) minmax(420px, 1.14fr);
  gap:30px;
  align-items:center;
  background:#fff;
  border:1px solid var(--line);
  border-radius:18px;
  padding:24px;
  box-shadow:0 14px 34px rgba(12,44,71,.08);
}
.news-scroll-text{
  padding:4px 4px 4px 2px;
}
.news-scroll-text h3{
  margin:0 0 12px;
  color:var(--navy);
  font-size:24px;
  line-height:1.28;
}
.news-scroll-text p:not(.news-kicker){
  margin:0;
  color:#40536a;
  font-size:15.5px;
  line-height:1.75;
}
.news-scroll-viewport{
  height:430px;
  max-height:430px;
  overflow-y:scroll;
  overflow-x:hidden;
  padding:10px 10px 10px 0;
  border-radius:16px;
  scroll-snap-type:y proximity;
  scrollbar-gutter:stable;
  -webkit-overflow-scrolling:touch;
}
.news-scroll-figure{
  margin:0 0 18px;
  border:1px solid var(--line);
  border-radius:14px;
  overflow:hidden;
  background:#f7fafc;
  scroll-snap-align:start;
}
.news-scroll-figure:last-child{
  margin-bottom:0;
}
.news-scroll-figure img{
  width:100%;
  height:auto;
  display:block;
}
.news-scroll-viewport::-webkit-scrollbar{
  width:9px;
}
.news-scroll-viewport::-webkit-scrollbar-track{
  background:#eef4f9;
  border-radius:999px;
}
.news-scroll-viewport::-webkit-scrollbar-thumb{
  background:#9fb4cc;
  border-radius:999px;
}
@media (max-width:900px){
  .news-scroll-card{
    grid-template-columns:1fr;
    padding:20px;
  }
  .news-scroll-viewport{
    height:390px;
    max-height:390px;
  }
}
@media (max-width:560px){
  .news-scroll-viewport{
    height:340px;
    max-height:340px;
  }
}