:root{
  --navy:#16243F; --navy-2:#1B2E52; --teal:#1C7293; --teal-dk:#0F5366;
  --gold:#E8A33D; --ink:#1E293B; --muted:#5B6678; --line:#DCE3EC;
  --bg:#FFFFFF; --bg-soft:#F4F7FA; --maxw:760px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{margin:0;background:var(--bg);color:var(--ink);
  font-family:"Noto Sans JP",-apple-system,BlinkMacSystemFont,"Hiragino Sans",sans-serif;
  font-size:16px;line-height:1.9;-webkit-font-smoothing:antialiased}
.en body, body.en{line-height:1.65}
h1,h2,h3{font-family:"Shippori Mincho","Hiragino Mincho ProN",serif;
  color:var(--navy);line-height:1.45;letter-spacing:.02em;font-weight:600}
h1{font-size:1.9rem;margin:.2em 0 .6em}
h2{font-size:1.3rem;margin:2.2em 0 .6em;padding-left:.7em;border-left:4px solid var(--teal)}
p{margin:0 0 1.2em}
a{color:var(--teal-dk);text-decoration-color:rgba(28,114,147,.4);text-underline-offset:3px}
a:hover{color:var(--teal)}
a:focus-visible,button:focus-visible{outline:2px solid var(--gold);outline-offset:2px}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 22px}
/* header */
.site-head{border-bottom:1px solid var(--line);background:var(--bg)}
.site-head .wrap{display:flex;flex-wrap:wrap;align-items:baseline;gap:.4em 1.2em;padding-top:18px;padding-bottom:14px}
.brand{font-family:"Shippori Mincho",serif;font-size:1.05rem;font-weight:700;color:var(--navy);text-decoration:none}
.brand small{display:block;font-family:"Noto Sans JP",sans-serif;font-weight:400;font-size:.72rem;color:var(--muted);letter-spacing:.06em}
nav.main{margin-left:auto;display:flex;flex-wrap:wrap;gap:1.1em;font-size:.88rem}
nav.main a{text-decoration:none;color:var(--ink)}
nav.main a[aria-current=page]{color:var(--teal-dk);font-weight:600;border-bottom:2px solid var(--gold)}
.lang{font-size:.78rem;color:var(--muted)}
/* hero */
.hero{padding:64px 0 40px}
.hero .kicker{font-size:.82rem;letter-spacing:.18em;color:var(--teal-dk);text-transform:uppercase;margin-bottom:1em}
.hero h1{font-size:2.05rem}
.hero .by{color:var(--muted);font-size:.95rem}
/* definition block — signature element */
.teigi{position:relative;margin:2.4em 0;padding:1.6em 1.7em 1.5em;
  background:var(--bg-soft);border:1px solid var(--line);border-left:5px solid var(--navy)}
.teigi .term{font-family:"Shippori Mincho",serif;font-weight:700;color:var(--navy);font-size:1.02rem}
.teigi .yomi{font-size:.74rem;color:var(--muted);letter-spacing:.12em;margin-left:.8em}
.teigi p{margin:.7em 0 0;font-size:.97rem}
.teigi .role{margin-top:.9em;padding-top:.9em;border-top:1px dashed var(--line);color:var(--muted);font-size:.9rem}
.teigi::after{content:"定義";position:absolute;top:-1px;right:-1px;background:var(--navy);color:#fff;
  font-size:.68rem;letter-spacing:.25em;padding:.25em .8em .25em 1em}
.en .teigi::after{content:"DEFINITION";letter-spacing:.18em}
/* content helpers */
.lead{font-size:1.04rem}
.note{font-size:.85rem;color:var(--muted)}
figure{margin:2.2em 0}
figure img,figure svg{max-width:100%;height:auto;border:1px solid var(--line)}
figcaption{font-size:.82rem;color:var(--muted);margin-top:.6em}
.stub{margin:2em 0;padding:1.1em 1.3em;background:var(--bg-soft);border:1px dashed var(--line);
  color:var(--muted);font-size:.9rem}
/* CTA buttons & pricing */
.cta-row{display:flex;flex-wrap:wrap;gap:.8em;margin:1.8em 0}
.btn{display:inline-block;padding:.85em 1.5em;border-radius:6px;text-decoration:none;font-weight:600;font-size:.95rem}
.btn-primary{background:var(--teal);color:#fff}
.btn-primary:hover{background:var(--teal-dk);color:#fff}
.btn-ghost{border:1.5px solid var(--teal);color:var(--teal-dk);background:transparent}
.btn-ghost:hover{background:var(--bg-soft);color:var(--teal-dk)}
.btn small{display:block;font-weight:400;font-size:.72rem;opacity:.85;margin-top:.15em}
.price{font-family:"Shippori Mincho",serif;font-size:2rem;font-weight:700;color:var(--navy)}
.price small{font-size:.9rem;color:var(--muted);font-weight:400}
.kit-list{list-style:none;margin:1.2em 0;padding:0}
.kit-list li{padding:.5em 0 .5em 1.6em;border-bottom:1px solid var(--line);position:relative;font-size:.95rem}
.kit-list li::before{content:"▸";position:absolute;left:.2em;color:var(--teal)}
/* page list (hub & top) */
.pagelist{list-style:none;margin:1.6em 0;padding:0}
.pagelist li{border-top:1px solid var(--line)}
.pagelist li:last-child{border-bottom:1px solid var(--line)}
.pagelist a{display:block;padding:1.05em .4em;text-decoration:none}
.pagelist .q{font-family:"Shippori Mincho",serif;font-weight:600;color:var(--navy)}
.pagelist .d{display:block;font-size:.86rem;color:var(--muted);margin-top:.25em}
.pagelist a:hover .q{color:var(--teal-dk)}
/* footer */
.site-foot{margin-top:80px;border-top:1px solid var(--line);background:var(--bg-soft)}
.site-foot .wrap{padding:30px 22px 40px;font-size:.84rem;color:var(--muted)}
.site-foot .def{font-size:.82rem;margin-bottom:1em}
@media(max-width:560px){
  .hero{padding:44px 0 30px}
  .hero h1{font-size:1.55rem}
  h1{font-size:1.5rem}
  nav.main{margin-left:0}
}