:root{
  --bg:#f2f3f5;--paper:#ffffff;--ink:#2b2f36;--mut:#71767e;--line:#dfe1e6;
  --accent:#4a5468;--warn:#b8860b;--maxw:940px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--ink);font-family:"Hiragino Sans","Yu Gothic","Noto Sans JP",system-ui,sans-serif;line-height:1.8;font-size:15px}
a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto;display:block}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 22px}

header.site{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.95);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.top{display:flex;align-items:center;justify-content:space-between;height:64px;gap:16px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:1.2rem;letter-spacing:.04em}
.logo .sq{width:30px;height:30px;border-radius:8px;background:var(--accent);color:#fff;display:grid;place-items:center;font-weight:800}
.nav-toggle{display:none;background:none;border:0;font-size:1.5rem;color:var(--ink);cursor:pointer}
nav.main{display:flex;gap:18px;align-items:center;font-size:.92rem}
nav.main a{padding:6px 0;border-bottom:2px solid transparent;font-weight:600;color:#4d525b}
nav.main a:hover,nav.main a.active{color:var(--accent);border-color:var(--accent)}
.btn{display:inline-block;background:var(--accent);color:#fff;padding:11px 26px;border-radius:8px;font-weight:700;font-size:.94rem;transition:transform .15s}
.btn:hover{transform:translateY(-2px)}
.btn.ghost{background:transparent;color:var(--accent);border:1.5px solid var(--accent)}
.btn.sm{padding:8px 18px;font-size:.86rem}

.hero{padding:64px 0 56px;background:linear-gradient(180deg,#eef0f4,var(--bg))}
.hero .kicker{display:inline-block;color:var(--warn);font-weight:800;letter-spacing:.16em;font-size:.78rem;margin-bottom:14px}
.hero h1{font-size:clamp(2rem,5.4vw,3.5rem);font-weight:800;line-height:1.14}
.hero .sub{margin:18px 0 0;max-width:640px;color:var(--mut);font-size:1.05rem}
.hero .flag{margin-top:24px;display:flex;gap:10px;flex-wrap:wrap}
.hero .flag span{background:#fff7e6;border:1px solid #eed89a;color:#8a6d1a;padding:7px 16px;border-radius:999px;font-size:.85rem;font-weight:700}

section.blk{padding:48px 0}
section.blk.alt{background:var(--paper);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
h2.sec{font-size:1.4rem;font-weight:800;margin-bottom:10px}
p.sec-sub{color:var(--mut);margin-bottom:24px;max-width:620px}
.grid{display:grid;gap:16px}
.g3{grid-template-columns:repeat(3,1fr)}
.card{background:var(--paper);border:1px solid var(--line);border-radius:10px;padding:22px}
.card h3{color:var(--accent);font-size:1.02rem;margin-bottom:8px}
.card p{color:var(--mut);font-size:.92rem}
.panel{background:var(--paper);border:1px solid var(--line);border-radius:12px;padding:24px;margin-bottom:16px}
.panel h3{color:var(--accent);font-size:1.08rem;margin-bottom:8px}
.panel p,.panel li{color:var(--mut);font-size:.94rem}
.panel ul{margin:10px 0 0 18px}
.panel li{margin-bottom:8px}
.warn{background:#fff7e6;border-left:4px solid var(--warn);padding:16px 20px;border-radius:8px;color:#7a6217;font-size:.92rem;margin-top:20px}
.tbl{width:100%;border-collapse:collapse;font-size:.93rem;background:var(--paper);border:1px solid var(--line);border-radius:10px;overflow:hidden;margin:16px 0}
.tbl th,.tbl td{padding:12px 16px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
.tbl th{background:#eef0f4;color:var(--accent);font-weight:800}
.tbl tr:last-child td{border-bottom:0}

.phead{padding:48px 0 26px;border-bottom:1px solid var(--line)}
.crumb{font-size:.84rem;color:var(--mut);margin-bottom:12px}
.crumb a{color:var(--accent)}
.phead h1{font-size:clamp(1.8rem,4.3vw,2.6rem);font-weight:800}
.lede{margin-top:12px;max-width:700px;color:var(--mut);font-size:1.02rem}
.narrow{max-width:820px!important}
.cta-card{border:1.5px dashed var(--line);border-radius:12px;padding:34px;text-align:center;background:var(--paper);margin-top:24px}
.cta-card h3{color:var(--accent);font-size:1.25rem;margin-bottom:8px}
.cta-card p{color:var(--mut);font-size:.94rem;max-width:520px;margin:0 auto 18px}

footer.site{border-top:1px solid var(--line);margin-top:50px;padding:34px 0 28px;color:var(--mut);font-size:.88rem;background:#eef0f4}
.ft{display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap}
.ft .logo{color:var(--ink)}
.ft nav{display:flex;gap:16px;flex-wrap:wrap}
.ft nav a:hover{color:var(--accent)}

@media(max-width:820px){
  .g3{grid-template-columns:1fr}
  .nav-toggle{display:block}
  nav.main{position:fixed;top:64px;left:0;right:0;background:#fff;flex-direction:column;align-items:flex-start;padding:18px 24px;gap:15px;border-bottom:1px solid var(--line);display:none}
  nav.main.open{display:flex}
  .hero{padding:46px 0 44px}
  section.blk{padding:38px 0}
}