/* R04 · 开源字体库 / 骨架反解自 uncut.wtf
   基因：近白纸底 · 字为尊 · 1px 分栏线 · 无圆角无阴影 · 元数据一律等宽小写 */

:root{
  --bg:#fcfcfb;
  --ink:#0a0a0a;
  --muted:#767674;
  --line:#e4e3df;
  --hover:#f3f2ee;
  --pad:clamp(18px,3.6vw,52px);
}

*{margin:0;padding:0;box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  background:var(--bg);color:var(--ink);
  font-family:system-ui,-apple-system,"Helvetica Neue","PingFang SC","Microsoft YaHei",Arial,sans-serif;
  font-size:16px;line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
::selection{background:var(--ink);color:var(--bg)}
:focus-visible{outline:2px solid var(--ink);outline-offset:3px}

.meta{font-family:ui-monospace,"SFMono-Regular",Menlo,Consolas,monospace;font-size:11px;letter-spacing:.02em;color:var(--muted);text-transform:lowercase}

/* 顶栏 */
.top{position:sticky;top:0;z-index:40;background:rgba(252,252,251,.94);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.top-in{max-width:1560px;margin:0 auto;padding:0 var(--pad);height:64px;display:flex;align-items:center;justify-content:space-between;gap:18px}
.brand{font-weight:700;font-size:15px;letter-spacing:-.03em}
.brand sup{font-size:9px;font-weight:400;vertical-align:super;color:var(--muted);margin-left:3px}
.nav{display:flex;gap:clamp(12px,1.8vw,26px);overflow-x:auto;scrollbar-width:none}
.nav::-webkit-scrollbar{display:none}
.nav a{font-size:12.5px;color:var(--muted);padding:3px 0;white-space:nowrap;transition:color .2s}
.nav a:hover,.nav a[aria-current]{color:var(--ink)}
.nav a[aria-current]{text-decoration:underline;text-underline-offset:5px;text-decoration-thickness:1px}

/* 首屏：字撑满 */
.hero{max-width:1560px;margin:0 auto;padding:clamp(40px,7vw,100px) var(--pad) clamp(28px,4vw,52px)}
.hero h1{
  font-size:clamp(4rem,17vw,15rem);
  line-height:.82;letter-spacing:-.055em;font-weight:800;
}
.hero-row{
  display:flex;justify-content:space-between;align-items:flex-end;gap:24px;flex-wrap:wrap;
  margin-top:clamp(22px,3vw,40px);padding-top:18px;border-top:1px solid var(--ink);
}
.hero-row p{max-width:46ch;font-size:15px;color:var(--muted);line-height:1.75}
.hero-row .count{font-family:ui-monospace,monospace;font-size:12px;color:var(--ink)}

/* 分类标题 */
.cat{
  max-width:1560px;margin:0 auto;padding:clamp(26px,3.6vw,48px) var(--pad) 0;
  display:flex;align-items:baseline;justify-content:space-between;gap:18px;
}
.cat h2{
  font-size:clamp(1.6rem,3.4vw,2.6rem);letter-spacing:-.04em;font-weight:600;line-height:1;
}
.cat .meta{white-space:nowrap}

/* 字体网格：靠线分栏，不靠卡片 */
.grid{
  max-width:1560px;margin:0 auto;padding:clamp(14px,2vw,22px) var(--pad) clamp(30px,4vw,50px);
  display:grid;grid-template-columns:repeat(3,1fr);
  border-top:1px solid var(--line);border-left:1px solid var(--line);
  margin-left:auto;margin-right:auto;
}
.grid-wrap{max-width:1560px;margin:0 auto;padding:0 var(--pad)}
.cell{
  border-right:1px solid var(--line);border-bottom:1px solid var(--line);
  padding:clamp(16px,2vw,26px) clamp(14px,1.8vw,22px) clamp(12px,1.4vw,18px);
  display:flex;flex-direction:column;justify-content:space-between;min-height:clamp(158px,14.5vw,200px);
  transition:background .25s ease;
}
.cell:hover{background:var(--hover)}
.spec{
  font-size:clamp(34px,3.6vw,54px);line-height:1;letter-spacing:-.02em;
  padding:clamp(6px,1vw,14px) 0 clamp(22px,2.6vw,34px);
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
/* 四种字类，用系统栈模拟 */
.f-sans{font-family:"Helvetica Neue",Arial,sans-serif;font-weight:500}
.f-serif{font-family:Georgia,"Times New Roman","Songti SC",serif;font-weight:400}
.f-mono{font-family:ui-monospace,"SFMono-Regular",Menlo,Consolas,monospace;font-weight:400;letter-spacing:-.04em}
.f-display{font-family:"Arial Black",Impact,"Haettenschweiler",sans-serif;font-weight:900;letter-spacing:-.05em;transform:scaleY(1.06);transform-origin:bottom left}
.f-cn{font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;font-weight:300;letter-spacing:.02em}
.f-song{font-family:"Songti SC","Source Han Serif SC",Georgia,serif;font-weight:600;letter-spacing:.06em}
.f-kai{font-family:"Kaiti SC",KaiTi,"STKaiti",serif;font-weight:400;letter-spacing:.04em}
.f-round{font-family:"Yuanti SC","Hiragino Sans GB",system-ui,sans-serif;font-weight:500;letter-spacing:-.01em}

.cell-foot{display:flex;justify-content:space-between;align-items:flex-end;gap:12px;border-top:1px solid transparent}
.cell-foot h3{font-size:14px;font-weight:600;letter-spacing:-.01em;line-height:1.3}
.cell-foot .by{font-family:ui-monospace,monospace;font-size:10.5px;color:var(--muted);margin-top:3px;display:block}
.cell-links{display:flex;gap:10px;flex:none}
.cell-links a{font-family:ui-monospace,monospace;font-size:10.5px;color:var(--muted);border-bottom:1px solid var(--line);padding-bottom:1px;transition:color .2s,border-color .2s}
.cell-links a:hover{color:var(--ink);border-color:var(--ink)}

/* 页头 */
.phead{max-width:1560px;margin:0 auto;padding:clamp(34px,5vw,72px) var(--pad) clamp(20px,2.6vw,34px)}
.phead h1{font-size:clamp(2.2rem,7vw,5.4rem);line-height:.92;letter-spacing:-.05em;font-weight:800}
.phead .sub{margin-top:20px;max-width:52ch;color:var(--muted);font-size:15px;line-height:1.8}

/* 字体详情 */
.specimen{
  max-width:1560px;margin:0 auto;padding:0 var(--pad) clamp(30px,4vw,56px);
}
.big{
  border-top:1px solid var(--ink);border-bottom:1px solid var(--ink);
  padding:clamp(16px,3vw,40px) 0;overflow:hidden;
}
.big span{
  display:block;font-size:clamp(6rem,26vw,24rem);line-height:.78;letter-spacing:-.06em;
  font-family:"Songti SC","Source Han Serif SC",Georgia,serif;font-weight:600;
  white-space:nowrap;
}
.rows{border-top:1px solid var(--line)}
.row{
  display:grid;grid-template-columns:200px 1fr;gap:clamp(14px,3vw,44px);
  padding:clamp(16px,2vw,24px) 0;border-bottom:1px solid var(--line);align-items:baseline;
}
.row dt{font-family:ui-monospace,monospace;font-size:11px;color:var(--muted);text-transform:lowercase}
.row dd{font-size:15px;line-height:1.75}
.weights{display:flex;flex-wrap:wrap;gap:clamp(8px,1.2vw,16px)}
.weights span{border:1px solid var(--line);padding:7px 12px;font-size:13px;letter-spacing:.02em}

/* 字符网格 */
.charset{display:grid;grid-template-columns:repeat(auto-fill,minmax(46px,1fr));border-top:1px solid var(--line);border-left:1px solid var(--line);margin-top:12px}
.charset i{
  font-style:normal;display:flex;align-items:center;justify-content:center;
  aspect-ratio:1;border-right:1px solid var(--line);border-bottom:1px solid var(--line);
  font-size:20px;color:var(--ink);
}

/* 开源说明 */
.two{display:grid;grid-template-columns:1fr 1fr;gap:clamp(24px,5vw,72px)}
.two p{font-size:15px;color:var(--muted);line-height:1.85;max-width:46ch}
.two h3{font-size:14px;letter-spacing:.02em;margin-bottom:12px;font-weight:600}

.btn{
  display:inline-flex;align-items:center;gap:8px;border:1px solid var(--ink);padding:11px 18px;
  font-size:12.5px;transition:background .22s,color .22s;
}
.btn:hover{background:var(--ink);color:var(--bg)}

/* 页脚 */
.foot{border-top:1px solid var(--ink);margin-top:clamp(40px,6vw,80px)}
.foot-in{max-width:1560px;margin:0 auto;padding:clamp(26px,3.4vw,42px) var(--pad);
  display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap}
.foot p{font-size:12.5px;color:var(--muted);max-width:40ch;line-height:1.7}
.foot nav{display:flex;gap:18px;flex-wrap:wrap}
.foot nav a{font-size:12.5px;color:var(--muted)}
.foot nav a:hover{color:var(--ink)}
.foot-btm{max-width:1560px;margin:0 auto;padding:14px var(--pad) 26px;border-top:1px solid var(--line);
  display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;
  font-family:ui-monospace,monospace;font-size:10.5px;color:var(--muted)}

/* 入场 */
.rv{opacity:0;transform:translateY(10px);transition:opacity .6s ease,transform .6s ease}
.rv.in{opacity:1;transform:none}

@media (max-width:1024px){
  .grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:680px){
  .grid{grid-template-columns:1fr}
  .cell{min-height:auto}
  .hero h1{font-size:clamp(3.4rem,20vw,6rem)}
  .row{grid-template-columns:1fr;gap:6px}
  .two{grid-template-columns:1fr}
  .spec{font-size:clamp(30px,9vw,40px)}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important}
  .rv{opacity:1;transform:none}
}