:root{--bg:#f2fbfd;--card:#fff;--ink:#0e1a1f;--muted:#5b7079;--line:#d5e8ee;--cy:#0e7490;--cy2:#0891b2;--max:900px}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font-family:"Hiragino Kaku Gothic ProN","Hiragino Sans","Noto Sans JP","Yu Gothic",Meiryo,sans-serif;font-size:16px;line-height:1.85}
img{max-width:100%;display:block;height:auto}
a{color:var(--cy);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3{line-height:1.4;margin:0;font-weight:800;letter-spacing:-.02em}
p{margin:0}
.wrap{max-width:var(--max);margin:0 auto;padding:0 20px}
.narrow{max-width:680px}
.lbl{font-family:ui-monospace,Menlo,monospace;font-size:10.5px;letter-spacing:.18em;color:var(--cy);margin-bottom:12px}
.skip{position:absolute;left:-9999px}
.skip:focus{left:10px;top:10px;background:var(--cy);color:#fff;padding:8px 12px;z-index:99}

.hd{background:rgba(242,251,253,.94);backdrop-filter:blur(8px);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:40}
.hd-in{display:flex;align-items:center;gap:16px;min-height:60px}
.br{display:inline-flex;align-items:center;gap:9px;color:var(--ink);font-size:14px}
.br:hover{text-decoration:none}
.day{font-family:ui-monospace,monospace;font-size:11px;font-weight:700;background:var(--ink);color:#7fe0ef;padding:2px 6px;border-radius:4px}
.nv{display:flex;gap:16px;font-size:12.5px;margin-left:auto}
.nv a{color:var(--muted)}
.nv a:hover{color:var(--cy);text-decoration:none}
.yt{font-size:12px;font-weight:700;border:1px solid var(--line);padding:5px 11px;border-radius:4px;color:var(--ink);background:#fff}
.yt:hover{background:var(--cy);border-color:var(--cy);color:#fff;text-decoration:none}
.bg{display:none;background:none;border:0;padding:10px;cursor:pointer;margin-left:auto}
.bg span{display:block;width:20px;height:2px;background:var(--ink);margin:5px 0}

.hero{padding:54px 0 30px}
.hero h1{font-size:clamp(30px,5.2vw,46px);line-height:1.22}
.lead{color:var(--muted);margin-top:18px;max-width:38em;font-size:15px}
.meter{margin-top:26px;max-width:340px}
.mbar{height:6px;background:#d9edf3;border-radius:999px;overflow:hidden}
.mbar i{display:block;height:100%;background:linear-gradient(90deg,var(--cy),var(--cy2))}
.meter p{font-family:ui-monospace,monospace;font-size:11px;color:var(--muted);margin-top:6px}
.acts{display:flex;gap:10px;flex-wrap:wrap;margin-top:24px}
.go{background:var(--ink);color:#fff;font-weight:700;font-size:14px;padding:12px 22px;border-radius:8px}
.go:hover{text-decoration:none;background:#173038}
.go2{border:1px solid var(--line);background:#fff;color:var(--ink);font-weight:700;font-size:14px;padding:12px 22px;border-radius:8px}
.go2:hover{border-color:var(--cy);color:var(--cy);text-decoration:none}

.h2{font-size:18px;margin:38px 0 14px}
.more{margin-top:14px;font-size:13.5px}
.phases{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.ph{background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px;color:var(--ink)}
.ph:hover{border-color:var(--cy);text-decoration:none}
.pr{font-family:ui-monospace,monospace;font-size:10.5px;color:var(--cy)}
.ph b{display:block;font-size:15px;margin:6px 0 5px}
.ph p{font-size:12.5px;color:var(--muted)}

.spine{list-style:none;margin:0;padding:0 0 0 30px;position:relative}
.spine::before{content:"";position:absolute;left:9px;top:6px;bottom:6px;width:2px;background:linear-gradient(#bfe3ec,#dff0f5)}
.node{position:relative;margin-bottom:8px}
.node::before{content:"";position:absolute;left:-25px;top:16px;width:10px;height:10px;border-radius:50%;background:#fff;border:2px solid var(--cy)}
.node a{display:flex;gap:12px;align-items:flex-start;background:#fff;border:1px solid var(--line);border-radius:10px;padding:12px 14px;color:var(--ink)}
.node a:hover{border-color:var(--cy);text-decoration:none}
.dn{font-family:ui-monospace,monospace;font-size:11px;font-weight:700;color:var(--cy);background:#e6f6fa;border-radius:4px;padding:2px 6px;white-space:nowrap}
.nb b{display:block;font-size:14px;line-height:1.6}
.nd{display:block;font-size:11px;color:var(--muted);margin-top:3px}

.panes{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.pane{background:#fff;border:1px solid var(--line);border-radius:10px;padding:16px}
.pane h3{font-size:14px;margin-bottom:6px}
.pane p{font-size:13px;color:var(--muted)}

.faq details{background:#fff;border:1px solid var(--line);border-radius:10px;padding:13px 15px;margin-bottom:8px}
.faq summary{cursor:pointer;list-style:none;font-weight:700;font-size:14px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::before{content:"Q ";color:var(--cy);font-family:ui-monospace,monospace;font-size:12px}
.faq p{font-size:13.5px;color:var(--muted);margin-top:9px}
.hsub{color:var(--muted);font-size:13.5px;margin-top:12px}
.cta{background:#fff;border:1px solid var(--line);border-radius:12px;padding:22px;text-align:center;margin:20px 0 46px}
.cta p{color:var(--muted);font-size:13.5px;margin-bottom:12px}
.cta a{display:inline-block;background:var(--ink);color:#fff;padding:11px 22px;border-radius:8px;font-size:13px;font-weight:700}
.cta a:hover{text-decoration:none;background:#173038}

.bc{font-family:ui-monospace,monospace;font-size:11px;color:var(--muted);padding:20px 0 10px}
.bc a{color:var(--muted)}
h1{font-size:clamp(24px,4vw,32px);margin-top:6px}
.ehead{padding-bottom:16px;border-bottom:1px solid var(--line)}
.erow{display:flex;gap:10px;align-items:center;margin-bottom:8px}
.dbig{font-family:ui-monospace,monospace;font-size:12px;font-weight:700;background:var(--ink);color:#7fe0ef;padding:3px 9px;border-radius:5px}
.chip{font-size:11px;border:1px solid var(--line);border-radius:999px;padding:1px 9px;color:var(--muted)}
.ed{font-family:ui-monospace,monospace;font-size:11px;color:var(--muted);margin-left:auto}
.body{padding:18px 0}
.body h2{font-size:16px;margin:26px 0 8px;padding-left:10px;border-left:3px solid var(--cy)}
.body p{font-size:15px;color:#22343c;margin:10px 0}
.note{background:#fff;border:1px solid var(--line);border-left:3px solid var(--cy);border-radius:8px;padding:12px 15px}
.note p{font-size:14.5px;margin:0}
.pn{display:flex;gap:10px;margin-top:26px}
.pn a{flex:1;background:#fff;border:1px solid var(--line);border-radius:10px;padding:11px 13px;font-size:12.5px;color:var(--ink)}
.pn a:hover{border-color:var(--cy);text-decoration:none}
.pn span{display:block;font-size:10px;color:var(--muted);margin-bottom:3px}
.pn .nx{text-align:right}
.ph{flex:1}
.rel{border-top:1px solid var(--line);margin-top:28px;padding-top:16px}
.rel h2{font-size:13px;margin-bottom:8px}
.rel ul{list-style:none;padding:0;margin:0}
.rel li{display:flex;justify-content:space-between;gap:12px;padding:8px 0;border-bottom:1px solid var(--line);font-size:13.5px}
.rel li span{font-size:11px;color:var(--muted)}
.back{margin:22px 0 46px;font-size:13.5px}
.nf{padding:70px 0 90px}
.box{background:#fff;border:1px solid var(--line);border-radius:10px;padding:14px 16px;margin:18px 0}
.box p{font-size:13px;margin:3px 0;color:var(--muted)}
.tbl{width:100%;border-collapse:collapse;font-size:13.5px;margin:16px 0;background:#fff}
.tbl th,.tbl td{border:1px solid var(--line);padding:8px 11px;text-align:left;vertical-align:top}
.tbl th{background:#eaf7fa;color:var(--muted);font-weight:400;white-space:nowrap}
code{font-family:ui-monospace,monospace;font-size:12px;background:#e6f6fa;padding:1px 5px;border-radius:4px}
.ul{list-style:none;padding:0;margin:12px 0;font-size:14.5px;color:#22343c}
.ul li{padding:4px 0 4px 16px;position:relative}
.ul li::before{content:"—";position:absolute;left:0;color:var(--cy)}
.upd{font-family:ui-monospace,monospace;font-size:11px;color:var(--muted);margin-top:8px}

.ft{border-top:1px solid var(--line);background:#fff;padding:34px 0 28px;font-size:12.5px;margin-top:20px}
.fg{display:grid;grid-template-columns:1.7fr 1fr 1fr;gap:26px}
.fd{color:var(--muted);font-size:12px;margin:10px 0;line-height:1.8}
.fyt{font-size:12px;font-weight:700}
.ft nav h3{font-size:10px;letter-spacing:.16em;color:var(--muted);margin-bottom:8px}
.ft nav a{display:block;color:var(--ink);padding:2px 0;font-size:12px}
.fl2{border-top:1px solid var(--line);margin-top:24px;padding-top:14px;font-size:11px;color:var(--muted)}
.fl2 p{margin:2px 0}
.cp{margin-top:8px}

@media(max-width:860px){
.nv{display:none;position:absolute;top:100%;left:0;right:0;background:var(--bg);border-bottom:1px solid var(--line);flex-direction:column;gap:0;padding:6px 20px 16px}
.nv.open{display:flex}
.nv a{padding:11px 0;border-bottom:1px solid var(--line)}
.yt{display:none}
.bg{display:block}
.phases,.panes,.fg{grid-template-columns:1fr}
}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}