:root{--paper:#f7f5f0;--card:#fff;--ink:#1e2a3a;--muted:#6f7680;--line:#e2ded4;--navy:#13294b;--red:#a8342b;--gold:#9b7c47}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:70px}
body{margin:0;background:var(--paper);color:var(--ink);font:15px/1.7 -apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif}
a{color:inherit}
img{max-width:100%;height:auto}
.wrap{max-width:1180px;margin:0 auto;padding:0 20px}
.skip{position:fixed;top:-60px;left:8px;background:#fff;padding:8px;z-index:9}.skip:focus{top:8px}
.top{background:var(--navy);color:#fff;position:sticky;top:0;z-index:5}
.top-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:60px;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none}
.brand-mark{display:grid;place-items:center;width:34px;height:34px;border:1.5px solid #e9d9b4;border-radius:50%;font:600 17px "Songti SC",STSong,serif;color:#e9d9b4}
.brand-name{font:600 17px/1.2 "Songti SC",STSong,serif;letter-spacing:.04em}.brand-name small{display:block;font:11px/1.6 -apple-system,"PingFang SC",sans-serif;color:#b9c2d0;letter-spacing:0}
.nav{display:flex;gap:18px;font-size:13px}.nav a{text-decoration:none;color:#dfe5ee}.nav a:hover{color:#fff}
.main{padding:28px 20px 50px}
.eyebrow{font-size:10px;letter-spacing:.18em;color:var(--gold);margin:0 0 8px;font-weight:600}
h1{font:600 32px/1.35 "Songti SC",STSong,"Noto Serif CJK SC",serif;letter-spacing:.03em;margin:0 0 10px}
.lead{color:var(--muted);margin:0;max-width:720px}
.hero{display:flex;justify-content:space-between;align-items:flex-end;gap:30px;padding:8px 0 22px;border-bottom:1px solid var(--line)}
.stats{display:flex;gap:26px;margin:0;flex-shrink:0}.stats div{text-align:right}.stats dt{font:600 24px/1.2 Georgia,"Songti SC",serif;color:var(--navy)}.stats dd{margin:0;font-size:12px;color:var(--muted)}
.years{display:flex;flex-wrap:wrap;gap:6px;padding:16px 0 6px}
.years a{text-decoration:none;font-size:12px;padding:2px 9px;border:1px solid var(--line);border-radius:20px;background:#fff;color:var(--muted)}.years a:hover{border-color:var(--navy);color:var(--navy)}
.year h2{display:flex;align-items:baseline;gap:10px;font:600 22px Georgia,"Songti SC",serif;color:var(--navy);margin:30px 0 12px;padding-bottom:6px;border-bottom:2px solid var(--navy)}
.year h2 span{font:12px -apple-system,"PingFang SC",sans-serif;color:var(--muted)}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:14px}
.card{display:flex;flex-direction:column;background:var(--card);border:1px solid var(--line);border-radius:10px;overflow:hidden;text-decoration:none;transition:transform .15s,box-shadow .15s}
.card:hover{transform:translateY(-3px);box-shadow:0 10px 24px #13294b18}
.card-img{position:relative;height:170px;display:grid;place-items:center;background:radial-gradient(circle at 50% 45%,#fff,#f0ede5);padding:12px}
.card-img img{max-height:146px;width:auto;object-fit:contain}
.card-img.label-only .card-code{display:none}
.card-img.label-only{background:#ebe8df;padding:18px 10px}.card-img.label-only img{max-height:none;width:100%;border-radius:3px;box-shadow:0 2px 6px #0002}
.card-code{position:absolute;top:8px;left:9px;font:600 11px Georgia,serif;color:var(--navy);background:#fffc;padding:0 6px;border-radius:3px}
.card-body{padding:10px 12px 12px;border-top:1px solid var(--line)}
.card-title{font-weight:600;font-size:14px;line-height:1.5}
.card-meta{font-size:12px;color:var(--muted);margin-top:3px}
.crumbs{font-size:12px;color:var(--muted);margin-bottom:14px}.crumbs a{text-decoration:none}
.coin-head{margin-bottom:16px}
.pair{display:flex;gap:24px;justify-content:center;flex-wrap:wrap;background:radial-gradient(circle at 50% 40%,#fff,#efebe2);border:1px solid var(--line);border-radius:12px;padding:24px}
.pair figure{margin:0;text-align:center;flex:1 1 260px;max-width:380px}.pair img{width:100%;max-height:360px;object-fit:contain}
.pair figcaption{font-size:12px;color:var(--muted)}
.credit{font-size:12px;color:var(--muted);margin:8px 0 0}.credit a{text-underline-offset:3px}
.coin-body{display:grid;grid-template-columns:minmax(0,480px) minmax(0,1fr);gap:34px;margin-top:24px;align-items:start}
.coin-body h2{font:600 17px "Songti SC",STSong,serif;margin:0 0 10px;color:var(--navy)}.coin-body h2:not(:first-child){margin-top:22px}
.spec{border-collapse:collapse;width:100%;max-width:520px;background:#fff;border:1px solid var(--line)}
.spec th,.spec td{padding:8px 12px;border-bottom:1px solid var(--line);text-align:left;font-size:14px}.spec th{width:110px;color:var(--muted);font-weight:400;background:#faf8f3}
.idcard{background:#fff;border:1px solid var(--line);border-radius:10px;overflow:hidden;box-shadow:0 4px 16px #13294b12}
.idcard-label{display:block;width:100%;height:auto;border-bottom:1px solid var(--line)}
.idcard .spec{border:0;max-width:none}.idcard .spec tr:last-child th,.idcard .spec tr:last-child td{border-bottom:0}
.idcard-src{padding:8px 12px;margin:0;border-top:1px solid var(--line);background:#faf8f3}
.related h2{margin-top:0}.related .rel-grid+h2{margin-top:22px}.rel-note{margin:-6px 0 12px;font-size:13px;color:var(--muted)}.rel-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px}
.rel{display:flex;flex-direction:column;align-items:center;text-align:center;gap:4px;padding:10px 6px;background:#fff;border:1px solid var(--line);border-radius:10px;text-decoration:none;transition:transform .15s,box-shadow .15s}
.rel:hover{transform:translateY(-2px);box-shadow:0 8px 20px #13294b18}
.rel img,.rel .ph{width:100%;max-width:120px;height:auto;aspect-ratio:1;object-fit:contain}.rel-t{font-weight:600;font-size:13px;line-height:1.5}.rel-m{font-size:11px;color:var(--muted)}
@media (max-width:760px){.rel-grid{grid-template-columns:1fr;gap:0;border:1px solid var(--line);border-radius:10px;overflow:hidden;background:#fff}.rel{flex-direction:row;justify-content:space-between;align-items:baseline;text-align:left;gap:10px;padding:10px 12px;border:0;border-radius:0;border-top:1px solid var(--line)}.rel:first-child{border-top:0}.rel:hover{transform:none;box-shadow:none}.rel img,.rel .ph{display:none}.rel-t{font-size:14px}.rel-m{white-space:nowrap}}
.intro{max-width:820px;margin-top:34px}.intro h2{font:600 19px "Songti SC",STSong,serif;color:var(--navy);margin:0 0 6px;padding-bottom:6px;border-bottom:2px solid var(--navy)}
.intro h3{font:600 16px "Songti SC",STSong,serif;color:var(--navy);margin:20px 0 4px}.intro p{margin:6px 0;text-align:justify}
.label{margin:0}.label img{width:100%;border-radius:4px;box-shadow:0 3px 12px #0002}.label figcaption{font-size:12px;color:var(--muted);margin-top:6px}
.prevnext{display:flex;justify-content:space-between;gap:16px;margin-top:36px;padding-top:14px;border-top:1px solid var(--line);font-size:13px}.prevnext a{text-decoration:none;color:var(--navy)}
.page-head{margin-bottom:18px}
.table-wrap{overflow-x:auto;background:#fff;border:1px solid var(--line);border-radius:8px}
.list{border-collapse:collapse;width:100%;font-size:13px;min-width:760px}.list th,.list td{padding:7px 10px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}.list th{background:var(--navy);color:#fff;font-weight:500;position:sticky;top:0}.list a{text-decoration:none}.list td:first-child a{color:var(--navy);font-weight:600}
.prose{max-width:720px}.prose h2{font:600 18px "Songti SC",STSong,serif;color:var(--navy);margin:24px 0 6px}
.vh{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
.controls{position:sticky;top:var(--head-h,60px);z-index:3;background:var(--paper);padding-bottom:6px}
.hero-pin{margin-top:-28px;padding-top:28px;background:var(--paper)}
@media (min-width:761px){.hero-pin{position:sticky;top:var(--head-h,60px);z-index:3}.controls{top:calc(var(--head-h,60px) + var(--hero-h,0px))}
  .coins-wrap{overflow:visible}.coins-wrap .coins thead th{top:calc(var(--head-h,60px) + var(--hero-h,0px) + var(--ctrl-h,0px))}.coins thead th:first-child{border-top-left-radius:8px}.coins thead th:last-child{border-top-right-radius:8px}}
.toolbar{display:flex;flex-wrap:wrap;gap:12px 22px;align-items:center;padding:18px 0 4px}
.seg{display:flex;align-items:center;gap:0}.seg-label{font-size:12px;color:var(--muted);margin-right:8px}
.seg button{font:13px -apple-system,"PingFang SC",sans-serif;padding:5px 14px;border:1px solid var(--line);background:#fff;color:var(--ink);cursor:pointer;margin-left:-1px}
.seg button:first-of-type{border-radius:6px 0 0 6px;margin-left:0}.seg button:last-of-type{border-radius:0 6px 6px 0}
.seg button[aria-pressed=true]{background:var(--navy);border-color:var(--navy);color:#fff;position:relative}
.seg button:focus-visible{outline:2px solid var(--gold);outline-offset:1px;position:relative}
.coins-wrap{margin-top:10px}
.coins{border-collapse:collapse;width:100%;font-size:13px}
.coins thead th{background:var(--navy);color:#fff;font-weight:500;text-align:left;padding:7px 10px;position:sticky;top:0;z-index:1}
.coins td{padding:6px 10px;border-bottom:1px solid var(--line);vertical-align:middle}
.coins .grp-head th{text-align:left;font:600 16px Georgia,"Songti SC",serif;color:var(--navy);background:#f1eee6;padding:9px 12px;border-bottom:1px solid var(--line)}
.coins .grp-head span{font:12px -apple-system,"PingFang SC",sans-serif;color:var(--muted);margin-left:10px}
.coins .row:hover td{background:#faf8f3}
.coins td.c-img{width:150px;padding:5px 8px}.c-img a{display:flex;gap:6px;justify-content:center}
.c-img img{width:64px;height:64px;object-fit:contain}
.ph{display:block;width:64px;height:64px;border-radius:50%;background:radial-gradient(circle at 40% 35%,#f4f1ea,#e4dfd3);box-shadow:inset 0 0 0 1px #d8d2c4}
.pair-sm{margin-top:12px;padding:14px;background:#faf8f3}.pair-sm figure{max-width:200px;flex-basis:160px}
.coins td.c-id{font:600 12px Georgia,serif;color:var(--navy);white-space:nowrap}
.coins td.c-title a{text-decoration:none;font-weight:600;font-size:14px}.coins td.c-title a:hover{color:var(--red)}
.m-meta{display:none}
.c-year,.c-face,.c-date,.c-mint,.c-theme{white-space:nowrap}
.coins[data-by=theme] .c-theme,.coins[data-by=face] .c-face{display:none}
.lb{position:fixed;inset:0;z-index:50;background:#0d1520e8;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:20px;cursor:zoom-out}
.lb[hidden]{display:none}.lb img{max-width:min(92vw,900px);max-height:84vh;object-fit:contain;cursor:default}
.lb-cap{color:#dfe5ee;font-size:13px;margin:10px 0 0}
.lb-close{position:absolute;top:max(12px,env(safe-area-inset-top));right:14px;width:44px;height:44px;border:0;border-radius:50%;background:#ffffff26;color:#fff;font-size:28px;line-height:1;cursor:pointer}
.lb-close:hover{background:#ffffff40}
.pair a{cursor:zoom-in}
.foot{border-top:1px solid var(--line);color:var(--muted);font-size:12px;padding:18px 0 26px;line-height:1.9}.foot a{color:inherit}
@media (max-width:760px){
  .hero{flex-direction:column;align-items:flex-start}.stats div{text-align:left}
  h1{font-size:25px}.coin-body{grid-template-columns:1fr}
  .grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.card-img{height:130px}.card-img img{max-height:110px}
  .nav{gap:12px;width:100%;padding-bottom:8px;overflow-x:auto}
  .pair{gap:10px;padding:14px;flex-wrap:nowrap}.pair figure{flex:1 1 0;min-width:0}
  .coins thead{display:none}
  .coins .c-id,.coins .c-year,.coins .c-theme,.coins .c-face,.coins .c-date,.coins .c-mint{display:none}
  .coins td.c-img{width:112px;padding:6px 4px 6px 8px}.c-img a{gap:4px}.c-img img,.ph{width:50px;height:50px}
  .m-meta{display:block;font-size:12px;color:var(--muted);line-height:1.6;margin-top:2px}
  .seg button{padding:5px 11px}
}