:root{
  --green:#3f8f4f; --green-dark:#2c6b39; --green-light:#eaf4ec;
  --accent:#e52822; --ink:#1c2421; --muted:#5d6b63; --line:#e2e8e3;
  --bg:#f6f8f6; --card:#ffffff; --chip:#eef3ef; --shadow:0 1px 3px rgba(20,40,25,.08),0 1px 2px rgba(20,40,25,.04);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  color:var(--ink);background:var(--bg);line-height:1.55;font-size:15px}
a{color:var(--green-dark);text-decoration:none}
.header{background:linear-gradient(135deg,var(--green-dark),var(--green));color:#fff;padding:26px 22px 20px}
.header .wrap{max-width:1180px;margin:0 auto}
.header h1{margin:0 0 4px;font-size:25px;letter-spacing:.3px}
.header .sub{opacity:.92;font-size:14px}
.header .meta{margin-top:8px;font-size:12.5px;opacity:.85}
.toolbar{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.96);backdrop-filter:blur(6px);
  border-bottom:1px solid var(--line);padding:12px 22px}
.toolbar .wrap{max-width:1180px;margin:0 auto;display:flex;gap:12px;align-items:center;flex-wrap:wrap}
.search{flex:1;min-width:240px;position:relative}
.search input{width:100%;padding:11px 38px 11px 40px;border:1.5px solid var(--line);border-radius:10px;
  font-size:15px;outline:none;transition:border-color .15s}
.search input:focus{border-color:var(--green)}
.search svg{position:absolute;left:12px;top:50%;transform:translateY(-50%);opacity:.5}
.search .clear{position:absolute;right:10px;top:50%;transform:translateY(-50%);cursor:pointer;border:none;
  background:none;font-size:18px;color:var(--muted);display:none}
.suggest{position:absolute;top:calc(100% + 5px);left:0;right:0;background:#fff;border:1px solid var(--line);
  border-radius:10px;box-shadow:0 8px 24px rgba(20,40,25,.16);max-height:340px;overflow:auto;z-index:90;display:none}
.suggest.open{display:block}
.suggest .item{padding:9px 12px;cursor:pointer;display:flex;gap:9px;align-items:center;font-size:14px;border-bottom:1px solid #f1f5f2}
.suggest .item:last-child{border-bottom:none}
.suggest .item.active,.suggest .item:hover{background:var(--green-light)}
.suggest .tag{font-size:10px;text-transform:uppercase;letter-spacing:.4px;padding:2px 7px;border-radius:5px;flex:none;font-weight:700}
.suggest .tag.author{background:#e7f0fb;color:#2c5b8c}
.suggest .tag.keyword{background:var(--chip);color:var(--green-dark)}
.suggest .tag.title{background:#fbeede;color:#a35a16}
.suggest .lbl{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.suggest mark{background:#fff3b0}
.filters{display:flex;gap:6px;flex-wrap:wrap}
.fbtn{border:1.5px solid var(--line);background:#fff;border-radius:20px;padding:7px 13px;font-size:13px;
  cursor:pointer;color:var(--muted);transition:all .12s;white-space:nowrap}
.fbtn.active{background:var(--green);border-color:var(--green);color:#fff;font-weight:600}
.count{font-size:13px;color:var(--muted);white-space:nowrap}
.bulk{display:flex;gap:6px;white-space:nowrap}
.bulkbtn{border:1.5px solid var(--green);background:#fff;color:var(--green-dark);border-radius:8px;
  padding:7px 12px;font-size:13px;font-weight:600;cursor:pointer;display:inline-flex;align-items:center;gap:6px;transition:all .12s}
.bulkbtn:hover{background:var(--green);color:#fff}
.bulkbtn svg{width:14px;height:14px}
.layout{max-width:1180px;margin:0 auto;padding:18px 22px 60px;display:grid;grid-template-columns:230px 1fr;gap:26px}
.nav{position:sticky;top:74px;align-self:start;max-height:calc(100vh - 90px);overflow:auto}
.nav h3{font-size:11px;text-transform:uppercase;letter-spacing:.8px;color:var(--muted);margin:0 0 8px}
.nav a{display:block;padding:8px 10px;border-radius:8px;color:var(--ink);margin-bottom:2px;
  border-left:3px solid transparent;transition:background .12s}
.nav a:hover{background:var(--green-light)}
.nav a.active{background:var(--green-light);border-left-color:var(--green)}
.nav a.active .nav-name{font-weight:600;color:var(--green-dark)}
.nav-name{display:block;font-size:13.5px;line-height:1.35}
.nav-time{display:block;font-size:11.5px;color:var(--muted);margin-top:3px}
.nav-count{display:block;font-size:11.5px;color:var(--green-dark);font-weight:600;margin-top:1px}
.mobnav{display:none}
.content{min-width:0}
.session{margin-bottom:34px;scroll-margin-top:80px}
.session-head{display:flex;align-items:baseline;gap:10px;border-bottom:2px solid var(--green);
  padding-bottom:8px;margin-bottom:6px}
.session-head h2{margin:0;font-size:20px;color:var(--green-dark)}
.session-head .sn{font-size:13px;color:var(--muted)}
.type-group{margin-top:16px}
.type-title{font-size:13px;text-transform:uppercase;letter-spacing:.6px;color:var(--muted);
  font-weight:700;margin:0 0 10px}
.card{background:var(--card);border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow);
  margin-bottom:12px;overflow:hidden;transition:box-shadow .15s}
.card:hover{box-shadow:0 4px 14px rgba(20,40,25,.10)}
.card-head{padding:0 0 14px 0;cursor:pointer}
.card-top{display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:9px 16px;border-bottom:1px solid var(--line);background:#fafcfa;border-radius:12px 12px 0 0}
.badge{font-size:11px;font-weight:700;letter-spacing:.6px;text-transform:uppercase;padding:4px 11px;
  border-radius:6px;color:#fff;white-space:nowrap}
.b-key{background:var(--accent)} .b-oral{background:var(--green-dark)}
.b-flash{background:#d98324} .b-poster{background:#5a7d8c} .b-plenary{background:#7a4ea3}
.card-top-left{display:flex;align-items:center;gap:9px;flex-wrap:wrap;min-width:0}
.timechip{display:inline-flex;align-items:center;gap:5px;font-size:12px;font-weight:600;
  padding:4px 10px;border-radius:14px;white-space:nowrap}
.timechip svg{width:13px;height:13px;flex:none}
.timechip.talk{color:var(--green-dark);background:var(--green-light)}
.timechip.poster{color:#5a6470;background:#eef2f4}
.card-top .card-id{font-size:12px;color:#8a988f;font-weight:600;white-space:nowrap}
.card-titlerow{display:flex;gap:12px;align-items:flex-start;padding:13px 16px 0 16px}
.card-main{flex:1;min-width:0;text-align:left}
.card-title{font-weight:650;font-size:15.5px;margin:0 0 5px;color:var(--ink)}
.card-authors{font-size:13.5px;color:var(--muted)}
.card-authors .pres{color:var(--green-dark);font-weight:650}
.kw{margin-top:8px;display:flex;gap:6px;flex-wrap:wrap}
.kw span{background:var(--chip);color:var(--green-dark);font-size:11.5px;padding:3px 9px;border-radius:12px}
.toggle{flex:none;color:var(--muted);font-size:14px;align-self:center;transition:transform .15s}
.card.open .toggle{transform:rotate(180deg)}
.card-body{display:none;padding:0 16px 16px 16px;border-top:1px solid var(--line);margin-top:0}
.card.open .card-body{display:block;padding-top:14px}
.card-body p{margin:0 0 10px;font-size:14px;color:#33403a}
.card-body p:last-child{margin-bottom:0}
mark{background:#fff3b0;color:inherit;padding:0 1px;border-radius:2px}
.noresults{padding:40px;text-align:center;color:var(--muted)}
.backtop{position:fixed;right:20px;bottom:20px;background:var(--green-dark);color:#fff;border:none;
  width:44px;height:44px;border-radius:50%;font-size:20px;cursor:pointer;box-shadow:var(--shadow);
  display:none;z-index:60}
.footer{text-align:center;color:var(--muted);font-size:12.5px;padding:20px}
@media(max-width:860px){
  .layout{grid-template-columns:1fr}
  .nav{display:none}
  .mobnav{display:block;position:sticky;top:62px;z-index:40;background:var(--bg);
    padding:10px 22px;border-bottom:1px solid var(--line)}
  .mobnav select{width:100%;padding:11px 12px;border:1.5px solid var(--line);border-radius:10px;
    font-size:15px;background:#fff;color:var(--ink);outline:none;appearance:none;
    background-image:url("data:image/svg+xml;charset=US-ASCII,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%232c6b39' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
    background-repeat:no-repeat;background-position:right 12px center}
  .mobnav select:focus{border-color:var(--green)}
}