:root{
  --bg:#ffffff;--bg-alt:#f5f7fa;--text:#1a1f2b;--muted:#5d6675;--line:#e3e7ee;
  --accent:#1f5eff;--accent-dark:#1548c4;--accent-soft:#e8efff;
  --max:1040px;
}
@media (prefers-color-scheme:dark){
  :root{--bg:#0f1218;--bg-alt:#161b24;--text:#eef1f6;--muted:#a3adbd;--line:#2a3140;--accent:#5b8cff;--accent-dark:#3f70e6;--accent-soft:#1c2a4a;}
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font-family:"Noto Sans JP","Inter",system-ui,-apple-system,"Hiragino Sans","Hiragino Kaku Gothic ProN",sans-serif;line-height:1.8;-webkit-font-smoothing:antialiased}
.container{max-width:var(--max);margin:0 auto;padding:0 20px}
a{color:var(--accent)}
.skip{position:absolute;left:-999px;top:0;background:var(--accent);color:#fff;padding:8px 12px}
.skip:focus{left:8px;top:8px;z-index:100}

.site-header{position:sticky;top:0;background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:blur(10px);border-bottom:1px solid var(--line);z-index:10}
.nav{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--text);font-family:"Inter","Noto Sans JP",sans-serif;font-weight:700;letter-spacing:.02em;font-size:1.05rem}
.brand-mark{width:22px;height:22px;border-radius:6px;background:linear-gradient(135deg,var(--accent),#6fb1ff);position:relative}
.brand-mark::after{content:"";position:absolute;left:6px;bottom:5px;width:10px;height:10px;border-left:3px solid #fff;border-bottom:3px solid #fff}
nav a{color:var(--muted);text-decoration:none;font-size:.95rem;margin-left:22px}
nav a:hover{color:var(--text)}
@media (max-width:560px){nav a{margin-left:14px;font-size:.88rem}}

.hero{padding:96px 0 80px;background:radial-gradient(900px 400px at 10% -10%,var(--accent-soft),transparent 60%)}
.eyebrow{font-family:"Inter",sans-serif;font-weight:600;font-size:.8rem;letter-spacing:.14em;text-transform:uppercase;color:var(--accent);margin:0 0 12px}
h1{font-size:clamp(2rem,5.5vw,3.2rem);line-height:1.3;margin:0 0 20px;font-weight:700;letter-spacing:.01em}
h2{font-size:clamp(1.5rem,3.2vw,2rem);margin:0 0 32px;font-weight:700}
h3{font-size:1.15rem;margin:0 0 10px}
.lead{font-size:1.08rem;color:var(--muted);max-width:640px;margin:0 0 32px}
.cta{display:flex;gap:12px;flex-wrap:wrap}
.btn{display:inline-block;padding:12px 24px;border-radius:8px;text-decoration:none;font-weight:600;border:1px solid transparent;transition:background .15s,color .15s}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:hover{background:var(--accent-dark)}
.btn-ghost{border-color:var(--line);color:var(--text)}
.btn-ghost:hover{background:var(--bg-alt)}

.section{padding:80px 0}
.section-alt{background:var(--bg-alt)}
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:20px}
.card{background:var(--bg);border:1px solid var(--line);border-radius:12px;padding:28px 24px}
.card p{margin:0;color:var(--muted);font-size:.97rem}

.profile{margin:0;border-top:1px solid var(--line)}
.profile>div{display:grid;grid-template-columns:160px 1fr;gap:16px;padding:18px 0;border-bottom:1px solid var(--line)}
.profile dt{font-weight:600;margin:0}
.profile dd{margin:0;color:var(--muted)}
@media (max-width:560px){.profile>div{grid-template-columns:1fr;gap:4px}}

.contact{text-align:center}
.contact p{max-width:560px;margin:0 auto 24px;color:var(--muted)}
.muted{color:var(--muted);font-size:.9rem;margin-top:16px!important}

.site-footer{border-top:1px solid var(--line);padding:28px 0;font-size:.85rem;color:var(--muted)}
.site-footer p{margin:0}