:root{--ink:#0A0A0B;--ink-2:#5B6068;--ink-3:#9AA0A8;--ink-4:#C4C8CD;--line:#EAECEF;--bg-2:#F7F8F9;--e:cubic-bezier(.16,1,.3,1)}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{background:#fff;color:var(--ink);font:400 16px/1.7 -apple-system,BlinkMacSystemFont,"Segoe UI",Inter,system-ui,sans-serif;-webkit-font-smoothing:antialiased}
.doc{max-width:720px;margin:0 auto;padding:0 32px 120px}
nav{position:sticky;top:0;z-index:10;backdrop-filter:blur(18px) saturate(1.5);-webkit-backdrop-filter:blur(18px) saturate(1.5);background:rgba(255,255,255,.78);border-bottom:1px solid var(--line)}
nav .inner{max-width:720px;margin:0 auto;padding:16px 32px;display:flex;align-items:center}
.brand{display:flex;align-items:center;gap:9px;font-size:15px;font-weight:600;letter-spacing:-.015em;color:var(--ink);text-decoration:none}
.glyph{position:relative;width:17px;height:17px;flex:0 0 17px}
.glyph i{position:absolute;border-radius:3px;transition:all .5s var(--e)}
.glyph i:first-child{inset:0 4px 4px 0;border:1.5px solid var(--ink-4)}
.glyph i:last-child{inset:4px 0 0 4px;border:1.5px solid var(--ink)}
.brand:hover .glyph i:first-child{transform:translate(-1px,-1px)}
.brand:hover .glyph i:last-child{transform:translate(1px,1px)}
nav .sp{margin-left:auto}
nav a.nl{color:var(--ink-2);text-decoration:none;font-size:14px;margin-left:24px;transition:color .2s}
nav a.nl:hover{color:var(--ink)}
header.dh{padding:88px 0 44px;border-bottom:1px solid var(--line);margin-bottom:48px}
header.dh h1{font-size:clamp(32px,5vw,46px);line-height:1.05;font-weight:600;letter-spacing:-.04em}
header.dh .meta{margin-top:14px;font-size:13.5px;color:var(--ink-3)}
.summary{background:var(--bg-2);border:1px solid var(--line);border-radius:14px;padding:22px 24px;margin-bottom:48px}
.summary h2{font-size:13px;font-weight:600;letter-spacing:.02em;margin:0 0 10px;padding:0;border:0}
.summary p{font-size:14.5px;color:var(--ink-2);margin:0}
.summary p+p{margin-top:9px}
h2{font-size:20px;font-weight:600;letter-spacing:-.02em;margin:44px 0 12px;padding-top:0}
h2:first-of-type{margin-top:0}
h3{font-size:16px;font-weight:600;margin:26px 0 8px}
p{color:var(--ink-2);margin-bottom:14px}
ul{margin:0 0 18px 0;padding-left:0;list-style:none;display:grid;gap:9px}
li{color:var(--ink-2);font-size:15px;padding-left:20px;position:relative}
li::before{content:"";position:absolute;left:2px;top:11px;width:5px;height:5px;border-radius:50%;background:var(--ink-4)}
strong{color:var(--ink);font-weight:500}
a{color:var(--ink);text-decoration:underline;text-underline-offset:2px;text-decoration-color:var(--ink-4);transition:text-decoration-color .2s}
a:hover{text-decoration-color:var(--ink)}
table{width:100%;border-collapse:collapse;margin:6px 0 20px;font-size:14.5px}
th,td{text-align:left;padding:11px 12px;border-bottom:1px solid var(--line);vertical-align:top}
th{font-weight:500;color:var(--ink);font-size:13px;border-bottom-color:var(--ink-4)}
td{color:var(--ink-2)}
footer.site{border-top:1px solid var(--line);padding:26px 0 70px;display:flex;align-items:center;gap:18px;font-size:13px;color:var(--ink-3);flex-wrap:wrap}
footer.site .sp{margin-left:auto}
footer.site a{color:var(--ink-3);text-decoration:none}
footer.site a:hover{color:var(--ink)}
@media(max-width:600px){nav a.nl{margin-left:16px}header.dh{padding-top:56px}}