:root{
  --navy:#071b3a;--blue:#1554c0;--blue2:#2d67c7;--green:#2f7d1e;
  --gold:#d99a00;--ink:#182235;--muted:#647084;--line:#d8e0ec;
  --panel:#f5f8fc;--white:#fff;--max:1220px;--article:900px;
}
*{box-sizing:border-box} html{scroll-behavior:smooth}
body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif;color:var(--ink);line-height:1.7;background:#fff}
a{color:inherit} img{max-width:100%;display:block}
.site-header{position:sticky;top:0;z-index:30;background:#fffffff2;backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.navbar{max-width:var(--max);margin:auto;padding:.8rem 1.2rem;display:flex;justify-content:space-between;align-items:center;gap:2rem}
.brand{display:flex;align-items:center;gap:.75rem;text-decoration:none;font-weight:900;color:var(--navy)}
.brand-mark{width:44px;height:44px;border-radius:11px;display:grid;place-items:center;background:var(--navy);color:#ffd34d}
nav{display:flex;gap:1.25rem;flex-wrap:wrap}
nav a{text-decoration:none;color:var(--muted);font-weight:750}
nav a:hover{color:var(--blue)}
.hero{max-width:var(--max);margin:auto;padding:7rem 1.2rem 5rem;display:grid;grid-template-columns:1.1fr .9fr;gap:4rem;align-items:center}
.eyebrow{margin:0 0 .6rem;color:var(--blue);font-weight:900;letter-spacing:.11em;text-transform:uppercase;font-size:.8rem}
h1,h2,h3,h4{color:var(--navy);line-height:1.14;margin-top:0;scroll-margin-top:90px}
h1{font-size:clamp(3rem,6vw,5.5rem);letter-spacing:-.05em;margin-bottom:1.25rem}
h2{font-size:clamp(1.9rem,3.6vw,3.1rem);letter-spacing:-.035em;margin-top:3rem}
h3{font-size:1.45rem;margin-top:2rem}
h4{font-size:1.1rem;margin-top:1.4rem}
.lead{font-size:1.22rem;color:var(--muted)}
.actions{display:flex;gap:1rem;flex-wrap:wrap;margin-top:1.7rem}
.btn{display:inline-flex;padding:.88rem 1.18rem;border-radius:10px;text-decoration:none;font-weight:850}
.btn.primary{background:var(--blue);color:#fff}.btn.secondary{border:1px solid var(--line);background:#fff;color:var(--navy)}
.research-map{display:grid;gap:.7rem}
.research-map .step{padding:1.05rem;border:1px solid var(--line);border-radius:14px;background:var(--panel);text-align:center;font-weight:850;color:var(--navy);box-shadow:0 10px 25px #071b3a12}
.research-map .step.blue{background:var(--blue);color:#fff;border-color:var(--blue)}
.research-map .arrow{text-align:center;color:#91a3bd;font-size:1.5rem}
.section{padding:6rem 1.2rem}.section.alt{background:var(--panel)}
.container{max-width:var(--max);margin:auto}
.section-head{display:grid;grid-template-columns:68px 1fr;gap:1.25rem;margin-bottom:2.7rem}
.num{border-top:3px solid var(--blue);padding-top:.4rem;color:var(--blue);font-weight:900}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:2rem}
.card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:1.45rem;box-shadow:0 12px 32px #071b3a12}
.card p{color:var(--muted)}
.tag{display:inline-block;padding:.3rem .58rem;border-radius:999px;background:#eaf2ff;color:var(--blue);font-size:.78rem;font-weight:850;margin-bottom:.7rem}
.paper-hero{max-width:var(--max);margin:auto;padding:5.5rem 1.2rem 2rem}
.paper-meta{display:flex;gap:.7rem;flex-wrap:wrap;margin:.8rem 0 1.4rem}
.paper-meta span{background:var(--panel);border:1px solid var(--line);padding:.4rem .7rem;border-radius:999px;color:var(--muted);font-size:.85rem;font-weight:750}
.page-layout{max-width:var(--max);margin:auto;padding:1rem 1.2rem 5rem;display:grid;grid-template-columns:260px minmax(0,1fr);gap:2.4rem}
.toc{position:sticky;top:88px;align-self:start;border:1px solid var(--line);border-radius:14px;padding:1rem;background:#fff}
.toc strong{display:block;margin-bottom:.6rem;color:var(--navy)}
.toc a{display:block;text-decoration:none;color:var(--muted);padding:.28rem 0;font-size:.92rem}
.toc a:hover{color:var(--blue)}
.article{max-width:var(--article);min-width:0}
.article p{font-size:1.03rem}
.abstract{padding:1.25rem 1.35rem;background:var(--panel);border:1px solid var(--line);border-radius:14px}
.callout{padding:1rem 1.2rem;border-left:5px solid var(--blue);background:#eef5ff;border-radius:8px;color:var(--navy);font-weight:800;margin:1.4rem 0}
.callout.green{border-left-color:var(--green);background:#f1f8ed;color:var(--green)}
.definition{padding:1rem 1.2rem;border:1px solid #b9ccea;background:#f7faff;border-radius:12px;margin:1.4rem 0}
.figure{margin:2rem 0;border:1px solid var(--line);border-radius:14px;background:#fff;padding:.8rem}
.figure figcaption{color:var(--muted);font-size:.9rem;padding:.7rem .2rem 0}
.table-wrap{overflow-x:auto;background:#fff;border:1px solid var(--line);border-radius:14px;margin:1.5rem 0}
table{width:100%;border-collapse:collapse;font-size:.92rem}
caption{text-align:left;padding:1rem;font-weight:850;color:var(--navy)}
th{background:var(--blue);color:#fff}
th,td{padding:.7rem;border-bottom:1px solid var(--line);text-align:center}
tbody tr:nth-child(even){background:#f7f9fc}
.metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem;margin:1.8rem 0}
.metric{padding:1.2rem;background:#fff;border:1px solid var(--line);border-radius:14px}
.metric strong{display:block;font-size:2rem;color:var(--green)}.metric span{color:var(--muted)}
.refs{font-size:.95rem}.refs li{margin:.55rem 0}
.footer{background:var(--navy);color:#fff;padding:2rem 1.2rem}
.footer-inner{max-width:var(--max);margin:auto;display:flex;justify-content:space-between;gap:1rem;align-items:center}
.footer a{color:#a8c5ff;text-decoration:none}
@media(max-width:950px){
 nav{display:none}.hero,.grid-2,.page-layout{grid-template-columns:1fr}
 .hero{padding-top:4rem}.toc{position:static}.metrics{grid-template-columns:1fr}
 .section-head{grid-template-columns:44px 1fr}
}