:root{
  --bg:#f7f8f7; --ink:#0f1a20; --teal:#0f7f8f; --muted:#54626b; --dim:#8b979e;
  --line:#d5dcdb; --head:#eef2f1;
}
*{box-sizing:border-box}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font-family:"IBM Plex Sans","Noto Sans JP",system-ui,sans-serif;font-size:15.5px;line-height:1.85;
}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}
.mono{font-family:"IBM Plex Mono",monospace}
.wrap{width:min(1180px,calc(100% - 46px));margin:0 auto}

/* 顶栏 */
header{border-bottom:1px solid var(--ink);background:#fff}
header .wrap{display:flex;align-items:center;gap:22px;height:62px}
.monogram{width:30px;height:30px;background:var(--ink);color:#fff;display:flex;align-items:center;justify-content:center;font-family:"IBM Plex Mono",monospace;font-size:13px;font-weight:500;letter-spacing:.04em}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:17px;letter-spacing:.02em}
header nav{display:flex;gap:18px;margin-left:auto;flex-wrap:wrap}
header nav a{font-size:12.5px;color:var(--muted)}
header nav a.on{color:var(--teal);font-weight:600}
.btn{background:var(--teal);color:#fff;font-weight:700;font-size:12.5px;padding:9px 16px}
.subbar{border-bottom:1px solid var(--line);background:var(--head)}
.subbar .wrap{display:flex;gap:18px;padding:8px 0;font-family:"IBM Plex Mono",monospace;font-size:10.5px;color:var(--muted);letter-spacing:.06em}
.subbar b{color:var(--ink);font-weight:500}

/* 首屏 */
.hero{display:grid;grid-template-columns:minmax(0,1fr) 460px;gap:46px;padding:38px 0 30px;align-items:start}
.kick{font-family:"IBM Plex Mono",monospace;font-size:10.5px;letter-spacing:.2em;color:var(--teal);margin:0 0 12px}
h1{font-size:clamp(30px,3.8vw,46px);line-height:1.28;margin:0 0 14px;font-weight:700;letter-spacing:-.01em}
.hero p{color:var(--muted);font-size:14px;margin:0 0 18px;max-width:520px}
.ledger{border-top:1px solid var(--ink);border-bottom:1px solid var(--ink);margin:20px 0 18px;max-width:420px}
.ledger div{display:flex;justify-content:space-between;padding:9px 2px;border-bottom:1px solid var(--line)}
.ledger div:last-child{border-bottom:0}
.ledger span{font-family:"IBM Plex Mono",monospace;font-size:11px;color:var(--muted);letter-spacing:.06em}
.ledger b{font-size:12.5px;font-weight:600}
.shots{display:grid;grid-template-columns:1fr 1fr;gap:6px;border:1px solid var(--line);background:#fff;padding:6px}
.shots figure{margin:0;position:relative}
.shots img{width:100%;aspect-ratio:800/538;object-fit:cover}
.shots figcaption{font-family:"IBM Plex Mono",monospace;font-size:9px;color:var(--dim);padding:3px 2px 0;letter-spacing:.06em}

/* 伙伴 */
.strip{background:#fff;border-top:1px solid var(--ink);border-bottom:1px solid var(--line)}
.strip .wrap{display:flex;align-items:center;gap:30px;padding:17px 0;flex-wrap:wrap}
.strip .lb{font-family:"IBM Plex Mono",monospace;font-size:9.5px;letter-spacing:.2em;color:var(--dim)}
.strip .row{display:flex;gap:34px;align-items:center;flex-wrap:wrap}
.strip img{height:36px;width:auto;object-fit:contain}

/* 段落 */
section{padding:32px 0 6px}
.head{display:grid;grid-template-columns:60px 1fr auto;gap:16px;align-items:baseline;border-bottom:1px solid var(--ink);padding-bottom:8px;margin-bottom:14px}
.head .n{font-family:"IBM Plex Mono",monospace;font-size:11px;color:var(--teal);letter-spacing:.08em}
.head h2{font-size:20px;margin:0;font-weight:700}
.head .aside{font-family:"IBM Plex Mono",monospace;font-size:10px;color:var(--dim);letter-spacing:.08em}
table.t{width:100%;border-collapse:collapse;font-size:13.2px;background:#fff;border:1px solid var(--line)}
table.t th{text-align:left;font-family:"IBM Plex Mono",monospace;font-size:9.5px;letter-spacing:.12em;color:var(--dim);font-weight:400;background:var(--head);padding:8px 12px;border-bottom:1px solid var(--line)}
table.t td{padding:11px 12px;border-bottom:1px solid var(--line);color:var(--muted);vertical-align:top}
table.t tr:last-child td{border-bottom:0}
table.t td b{color:var(--ink);font-size:13.6px}
table.t td.n{font-family:"IBM Plex Mono",monospace;font-size:11px;color:var(--teal);width:56px}
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
.card{background:#fff;border:1px solid var(--line)}
.card img{width:100%;aspect-ratio:800/538;object-fit:cover}
.card div{padding:10px 12px}
.card b{display:block;font-size:13.6px}
.card small{color:var(--muted);font-size:11.8px;line-height:1.55;display:block}
.checks{list-style:none;padding:0;margin:0;background:#fff;border:1px solid var(--line)}
.checks li{padding:11px 14px 11px 34px;border-bottom:1px solid var(--line);position:relative;font-size:13.2px;color:var(--muted)}
.checks li:last-child{border-bottom:0}
.checks li:before{content:"";position:absolute;left:14px;top:17px;width:10px;height:6px;border-left:2px solid var(--teal);border-bottom:2px solid var(--teal);transform:rotate(-45deg)}

/* 子页 */
.pagehead{border-bottom:1px solid var(--ink);padding:38px 0 18px;display:grid;grid-template-columns:60px 1fr;gap:16px}
.pagehead .n{font-family:"IBM Plex Mono",monospace;font-size:11px;color:var(--teal);padding-top:10px}
.pagehead h1{font-size:clamp(28px,3.6vw,40px);margin:0 0 8px}
.pagehead p{margin:0;color:var(--muted);font-size:13.4px;max-width:640px}

/* FAQ */
.qtd{font-family:"IBM Plex Mono",monospace;font-size:10.5px;color:var(--teal);width:48px}
.prose{max-width:780px}
.prose h2{font-size:19px;margin:26px 0 6px}
.prose p{color:var(--muted);font-size:13.6px;margin:0 0 11px}

.timeline{border-top:1px solid var(--ink)}
.timeline>div{display:grid;grid-template-columns:64px minmax(0,1fr);gap:20px;padding:18px 0;border-bottom:1px solid var(--line)}
.timeline .step{font-family:"IBM Plex Mono",monospace;font-size:20px;color:var(--teal);letter-spacing:.02em}
.timeline b{display:block;font-size:15px;margin-bottom:3px}
.timeline p{margin:0;color:var(--muted);font-size:13.4px}

footer{border-top:1px solid var(--ink);margin-top:40px;background:#fff;padding:20px 0 26px}
footer .wrap{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;color:var(--dim);font-size:11.5px;font-family:"IBM Plex Mono",monospace}
footer b{color:var(--ink)}

@media(max-width:940px){
  .wrap{width:calc(100% - 32px)}
  .hero{grid-template-columns:1fr}
  header nav{display:none}
  .cards,.head{grid-template-columns:1fr}
  .head .aside{display:none}
  .pagehead{grid-template-columns:1fr}
  .pagehead .n{padding-top:0}
}