:root{
  --paper:#f7f6f2;--grid:#e9e7df;--ink:#20242b;--muted:#6b7280;--line:#ddd9cd;
  --red:#b5341f;--red-soft:#f6e3de;--card:#fffdf8;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;color:var(--ink);
  font:17px/1.75 "Source Serif 4",Georgia,"Times New Roman",serif;
  background:var(--paper);
  background-image:linear-gradient(var(--grid) 1px,transparent 1px),linear-gradient(90deg,var(--grid) 1px,transparent 1px);
  background-size:32px 32px;
}
.shell{max-width:780px;margin:auto;padding:0 22px}
header{padding:22px 0;border-bottom:2px solid var(--ink);background:var(--paper)}
header .shell{display:flex;justify-content:space-between;align-items:baseline}
.brand{font:800 1.05rem/1 "Fraunces",Georgia,serif;letter-spacing:-.01em;color:var(--ink);text-decoration:none}
.brand em{font-style:normal;color:var(--red)}
.motto{font:500 .72rem/1 "IBM Plex Mono",ui-monospace,Menlo,monospace;letter-spacing:.14em;text-transform:uppercase;color:var(--muted)}
main{padding-bottom:40px}
h1{font:600 clamp(1.9rem,5vw,2.7rem)/1.12 "Fraunces",Georgia,serif;letter-spacing:-.02em;margin:44px 0 12px;text-wrap:balance}
.meta{color:var(--muted);font:400 .8rem/1.6 "IBM Plex Mono",ui-monospace,monospace;margin:0 0 26px}
h2{font:600 1.4rem/1.25 "Fraunces",Georgia,serif;margin:46px 0 12px;letter-spacing:-.012em}
h2::before{content:"§ ";color:var(--red);font-weight:400}
p{margin:0 0 14px}
a{color:var(--red);text-decoration-thickness:1.5px;text-underline-offset:.18em}
a:hover{color:#8e2917}
/* 实测读数条 */
.readout{display:flex;flex-wrap:wrap;gap:0;margin:26px 0 8px;border:2px solid var(--ink);background:var(--card)}
.readout div{flex:1 1 160px;padding:16px 18px;border-right:1px dashed var(--line)}
.readout div:last-child{border-right:0}
.readout b{display:block;font:700 1.55rem/1.1 "IBM Plex Mono",ui-monospace,monospace;letter-spacing:-.02em;font-variant-numeric:tabular-nums}
.readout span{display:block;margin-top:5px;font:500 .68rem/1.4 "IBM Plex Mono",ui-monospace,monospace;letter-spacing:.1em;text-transform:uppercase;color:var(--muted)}
.readout .measured{color:var(--red)}
/* 表格=账本 */
table{width:100%;border-collapse:collapse;margin:18px 0;background:var(--card);font:15px/1.55 "Source Serif 4",Georgia,serif}
th,td{padding:11px 13px;border:1px solid var(--line);text-align:left;vertical-align:top}
th{background:var(--ink);color:#f5f2ea;font:600 .78rem/1.4 "IBM Plex Mono",ui-monospace,monospace;letter-spacing:.06em;text-transform:uppercase}
td strong{font-family:"IBM Plex Mono",ui-monospace,monospace;font-size:.92em;font-variant-numeric:tabular-nums}
/* 红笔批注 */
.note{position:relative;background:var(--card);border:1px solid var(--line);border-left:5px solid var(--red);padding:16px 20px;margin:24px 0;font-size:.96em}
.note::before{content:"MARGIN NOTE";position:absolute;top:-9px;left:14px;background:var(--red);color:#fff;padding:2px 8px;font:700 .58rem/1 "IBM Plex Mono",monospace;letter-spacing:.14em}
pre{background:#1b212b;color:#e8edf4;padding:20px;overflow-x:auto;font:13.5px/1.65 "IBM Plex Mono",ui-monospace,monospace;border-radius:0;border-left:5px solid var(--red)}
code{font-family:"IBM Plex Mono",ui-monospace,monospace;font-size:.92em}
.disclosure{color:var(--muted);font:italic 400 .84rem/1.65 "Source Serif 4",Georgia,serif;border-top:1px dashed var(--line);margin-top:44px;padding-top:14px}
footer{margin-top:52px;padding:24px 0 44px;border-top:2px solid var(--ink);color:var(--muted);font:.78rem/1.7 "IBM Plex Mono",ui-monospace,monospace}
footer a{color:var(--muted)}
/* 首页 */
.index-hero{padding:56px 0 34px}
.index-hero h1{font-size:clamp(2.3rem,7vw,3.6rem);margin:0 0 14px}
.index-hero h1 em{font-style:normal;color:var(--red);text-decoration:underline;text-decoration-thickness:4px;text-underline-offset:.14em}
.sub{color:var(--muted);max-width:58ch;margin:0 0 12px}
.stamp{display:inline-block;margin:10px 0 30px;padding:6px 12px;border:2px solid var(--red);color:var(--red);font:700 .7rem/1 "IBM Plex Mono",monospace;letter-spacing:.16em;text-transform:uppercase;transform:rotate(-1.2deg)}
.card{display:block;position:relative;border:1px solid var(--line);border-left:5px solid var(--ink);background:var(--card);padding:24px 26px;margin:0 0 14px;text-decoration:none;color:var(--ink);transition:border-color .15s ease,transform .15s ease}
.card:hover{border-left-color:var(--red);transform:translateX(3px)}
.card h2{margin:0 0 8px;font-size:1.28rem}
.card h2::before{content:""}
.card p{margin:0;color:var(--muted);font-size:.96rem}
.tag{display:inline-block;margin-bottom:10px;color:var(--red);font:700 .66rem/1 "IBM Plex Mono",monospace;letter-spacing:.13em;text-transform:uppercase}
@media(max-width:600px){table{font-size:13px}th,td{padding:8px 9px}.readout b{font-size:1.2rem}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.card{transition:none}}