:root{
 --bg:#061d27;--card:#0b3440;--soft:#103d48;--text:#f5f7f7;--muted:#b7c8cd;
 --gold:#d5a83f;--gold2:#f0d486;--mint:#63d4c4;--line:#315862;--white:#fff;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:Tahoma,Arial,sans-serif;background:linear-gradient(180deg,#061d27,#04161d);color:var(--text);line-height:1.9}
a{color:inherit}
.wrap{max-width:1100px;margin:auto;padding:20px}
.top{position:sticky;top:0;z-index:20;background:#072630eF;border-bottom:1px solid #315862;backdrop-filter:blur(12px)}
.topin{max-width:1100px;margin:auto;padding:12px 20px;display:flex;align-items:center;gap:12px}
.brand{margin-inline-start:auto;font-weight:900;font-size:1.1rem}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;text-decoration:none;border:1px solid var(--line);background:#0a2e38;color:var(--text);border-radius:12px;padding:9px 13px;font-weight:800}
.btn.gold{background:linear-gradient(135deg,#b67d16,#e2b64f);color:#09191f;border-color:#e5c167}
.hero{margin-top:22px;background:linear-gradient(145deg,#0b3944,#082730);border:1px solid var(--line);border-radius:24px;padding:28px;box-shadow:0 20px 50px #0004}
.tag{display:inline-block;background:#173f48;color:var(--mint);border-radius:999px;padding:5px 10px;font-size:.82rem;font-weight:900}
h1{font-size:clamp(2rem,5vw,4rem);line-height:1.28;margin:12px 0;color:#fff}
h2{color:var(--mint);margin-top:34px;scroll-margin-top:95px}
.lead{font-size:1.16rem;color:#d7e1e4}
.meta{display:flex;gap:8px;flex-wrap:wrap;margin-top:18px}
.meta span{background:#082b34;border:1px solid var(--line);border-radius:999px;padding:6px 10px;color:#c6d5d9}
.toc{margin:22px 0;background:#0b313b;border:1px solid var(--line);border-radius:18px;padding:18px}
.toc b{display:block;font-size:1.2rem;margin-bottom:10px}
.toc a{display:block;text-decoration:none;color:var(--mint);padding:7px 0;border-bottom:1px solid #234a54}
.article{background:#082731;border:1px solid var(--line);border-radius:24px;padding:26px;margin:20px 0}
.article p{color:#eef3f4;font-size:1.04rem}
.sourcebox{margin-top:34px;background:#0a323d;border:1px solid #55747b;border-radius:18px;padding:18px}
.sourcebox li{margin:12px 0;color:#d7e1e4}
.sourcebox a{color:#f2d58d}
.crumbs{display:flex;gap:8px;flex-wrap:wrap;color:#c8d5d8;margin:18px 0}
.crumbs a{text-decoration:none;color:#f2d58d}
.nav2{display:flex;justify-content:space-between;gap:10px;margin:26px 0}
.nav2 .btn{flex:1}
.volume-grid,.study-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:20px}
.card{display:block;text-decoration:none;background:#0a303a;border:1px solid var(--line);border-radius:18px;padding:18px;min-height:170px}
.card small{color:var(--mint)}.card h3{margin:8px 0;color:#fff}.card p{color:#becdd1}
footer{border-top:1px solid #315862;margin-top:40px;padding:28px 20px;text-align:center;color:#9fb4b9}
@media(max-width:760px){
 .wrap{padding:14px}.hero,.article{padding:18px}.volume-grid,.study-grid{grid-template-columns:1fr}.nav2{display:grid}.topin{padding:10px 12px}.brand{font-size:.95rem}
}
@media print{
 .top,.nav2,footer{display:none!important}body{background:#fff;color:#000}.hero,.article,.sourcebox{background:#fff;color:#000;border:1px solid #ccc;box-shadow:none}.lead,.article p,.meta span{color:#222}h1,h2{color:#000}
}


/* V6.2 repeated encyclopedia brand */
.top{background:#fff!important;color:#10264a!important;border-bottom:1px solid #dfe5e8!important;box-shadow:0 3px 12px rgba(15,47,99,.06)!important}
.topin{max-width:1440px!important;min-height:88px!important;gap:12px!important}
.top .brand{display:flex!important;align-items:center!important;gap:12px!important;color:#10264a!important;font-weight:900!important}
.top .brand::before{content:"";display:block;width:58px;height:58px;flex:0 0 58px;background:url("brand-icon.svg") center/contain no-repeat}
.top .btn{background:#0f2f63!important;color:#fff!important;border:0!important}
.hero{border-right:6px solid #d9b341!important}
.tag,.btn.gold{background:#d9b341!important;color:#0f2f63!important;border-color:#d9b341!important}
a{color:#0f2f63}
@media(max-width:640px){
 .topin{min-height:78px!important;padding:10px 14px!important}
 .top .brand{font-size:.92rem!important}
 .top .brand::before{width:46px;height:46px;flex-basis:46px}
}