:root{color-scheme:light;--ink:#152738;--muted:#566778;--line:#dce5eb;--blue:#2f668b;--bg:#f7f9fb}*{box-sizing:border-box}body{margin:0;background:var(--bg);font:16px/1.8 -apple-system,BlinkMacSystemFont,"Hiragino Kaku Gothic ProN","Noto Sans JP",sans-serif;color:var(--ink)}a{color:var(--blue);text-underline-offset:3px}a:hover{text-decoration-thickness:2px}.container{max-width:820px;margin:auto;padding:0 24px}.site-header{background:#fff;border-bottom:1px solid var(--line)}.header-inner{display:flex;gap:24px;align-items:center;justify-content:space-between;padding-top:18px;padding-bottom:18px}.brand{font-weight:750;font-size:17px;text-decoration:none;color:var(--ink);white-space:nowrap}.mark{display:inline-grid;place-items:center;border-radius:7px;width:29px;height:29px;margin-right:7px;background:#e2eff7;color:#205b82}nav{display:flex;gap:22px;flex-wrap:wrap}nav a{color:var(--muted);font-size:13px;text-decoration:none}.eyebrow{color:var(--blue);font-size:11px;letter-spacing:.18em;font-weight:700;margin:58px 0 10px}h1{font-size:clamp(30px,5vw,44px);letter-spacing:-.03em;line-height:1.35;margin:0 0 12px}.lead{color:var(--muted);font-size:17px;margin:0 0 35px}.content{background:white;border:1px solid var(--line);border-radius:16px;padding:18px 36px 36px;box-shadow:0 10px 38px #16283707}.content section{margin:22px 0 30px}.content h2{font-size:18px;line-height:1.5;margin:28px 0 10px}.content p{margin:10px 0;color:#354759}.notice{padding:18px 22px;border-radius:9px;background:#f0f6fa;border-left:3px solid var(--blue)}.notice p{margin:5px 0 0}.date{font-size:13px;color:var(--muted)!important}footer{margin:55px 0 0;border-top:1px solid var(--line);padding:22px 0 32px;color:var(--muted);font-size:12px}footer .container{display:flex;justify-content:space-between;gap:15px}@media(max-width:620px){.header-inner{align-items:flex-start;flex-direction:column;gap:12px;padding:14px 24px}nav{gap:15px}.eyebrow{margin-top:38px}.content{padding:14px 20px 22px}footer .container{display:block}footer span{margin-left:12px}}