/* ====== Reset (一部) ====== */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Hiragino Sans", "Noto Sans JP", "Helvetica Neue", Arial, "Yu Gothic UI", "YuGothic", Meiryo, sans-serif; color: #0f172a; background: #ffffff; line-height: 1.7; }
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
:root{
  --bg:#ffffff; --fg:#0f172a; --muted:#475569; --brand:#0ea5e9; --brand-2:#22c55e; --accent:#111827; --surface:#f8fafc; --ring: #bae6fd;
}

/* ====== Layout ====== */
.container { width: min(1100px, 92vw); margin-inline: auto; }
header.site-header { position: sticky; top: 0; z-index: 50; background: rgba(255,255,255,.9); backdrop-filter: blur(8px); border-bottom: 1px solid #e5e7eb; }
.nav { display:flex; align-items:center; justify-content:space-between; padding: 12px 0; }
.brand { display:flex; align-items:center; gap: 10px; }
.brand-logo { width: 28px; height: 28px; border-radius: 7px; background: linear-gradient(135deg, var(--brand), var(--brand-2)); box-shadow: 0 2px 12px rgba(14,165,233,.35) }
.brand-name { font-weight: 700; letter-spacing: .02em; }
.nav-links { display:flex; gap: 18px; font-size: .95rem; color: var(--muted); }
.nav-links a:hover { color: var(--fg); text-decoration: underline; text-underline-offset: 3px; }

/* ====== Hero ====== */
.hero { position: relative; isolation:isolate; background: radial-gradient(1200px 400px at 50% -10%, #e0f2fe 0%, transparent 60%), linear-gradient(180deg, #ffffff 0%, #f8fafc 100%); }
.hero-inner { padding: clamp(48px, 8vw, 104px) 0; display:grid; grid-template-columns: 1.1fr .9fr; gap: 32px; align-items:center; }
.hero h1 { font-size: clamp(34px, 5vw, 56px); line-height: 1.05; margin: 0 0 12px; letter-spacing: .01em; }
.hero p.lead { color: var(--muted); font-size: clamp(16px, 2.3vw, 18px); margin: 0 0 24px; }
.cta { display:flex; gap: 12px; flex-wrap: wrap; }
.btn { display:inline-flex; align-items:center; gap:8px; padding: 12px 18px; border-radius: 999px; font-weight:600; border:1px solid transparent; transition: transform .04s ease, box-shadow .2s; }
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--brand); color: #fff; box-shadow: 0 6px 20px rgba(14,165,233,.35); }
.btn-primary:hover { box-shadow: 0 10px 28px rgba(14,165,233,.45); }
.btn-outline { border-color:#cbd5e1; background:#fff; }
.hero-visual { aspect-ratio: 4/3; border-radius: 18px; overflow:hidden; background:
  radial-gradient(80% 60% at 70% 20%, rgba(34,197,94,.15), transparent 60%),
  radial-gradient(70% 70% at 30% 80%, rgba(14,165,233,.18), transparent 60%),
  linear-gradient(135deg, #f1f5f9 0%, #ffffff 100%);
  border:1px solid #e5e7eb;
  box-shadow: 0 10px 40px rgba(2,6,23,.08);
}

/* ====== About (ブランド紹介) ====== */
section { padding: clamp(40px, 6vw, 72px) 0; }
.section-head { display:flex; align-items:end; justify-content:space-between; gap: 16px; margin-bottom: 24px; }
.section-head h2 { font-size: clamp(22px, 3.2vw, 28px); margin:0; }
.muted { color: var(--muted); font-size: .95rem; }
.about { background: var(--surface); border-top: 1px solid #e5e7eb; border-bottom: 1px solid #e5e7eb; }
.about-grid { display:grid; grid-template-columns: 1fr 1fr; gap: 28px; }
.about-card { background:#fff; border:1px solid #e5e7eb; border-radius:16px; padding:20px; box-shadow: 0 6px 20px rgba(2,6,23,.04); }
.about-card h3 { margin: 0 0 6px; font-size: 1.05rem; }
.about-card p { margin: 0; color: var(--muted); }

/* ====== Links (事業リンク) ====== */
.links-grid { display:grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.link-card { position:relative; border-radius: 16px; border:1px solid #e5e7eb; overflow:hidden; background:#fff; box-shadow: 0 8px 28px rgba(2,6,23,.05); transition: transform .15s ease, box-shadow .2s; }
.link-card:hover { transform: translateY(-3px); box-shadow: 0 12px 34px rgba(2,6,23,.08); }
.link-thumb { height: 160px; background:
  radial-gradient(70% 50% at 80% 20%, rgba(14,165,233,.22), transparent 60%),
  linear-gradient(135deg, #e2e8f0 0%, #f8fafc 100%);
}
.link-body { padding: 16px 18px; }
.link-title { font-weight:700; margin: 0 0 6px; }
.link-desc { margin: 0; color: var(--muted); font-size: .95rem; }
.chip { display:inline-block; font-size: .75rem; color: #0369a1; background:#e0f2fe; border:1px solid #bae6fd; padding: 2px 8px; border-radius: 999px; }

/* ====== Feeds (最新情報) ====== */
.feeds { background: var(--surface); border-top: 1px solid #e5e7eb; border-bottom: 1px solid #e5e7eb; }
.feeds-grid { display:grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.embed { background:#fff; border:1px solid #e5e7eb; border-radius: 14px; overflow:hidden; box-shadow: 0 8px 28px rgba(2,6,23,.05); }
.embed header { padding: 10px 14px; border-bottom: 1px solid #e5e7eb; font-weight: 600; }
.embed .frame { aspect-ratio: 16/10; width: 100%; border: 0; }
.embed .placeholder { padding: 16px; color: var(--muted); font-size: .95rem; }

/* ====== Footer ====== */
footer { padding: 28px 0; color: var(--muted); font-size: .95rem; }
.footer-grid { display:flex; align-items:center; justify-content:space-between; gap: 16px; flex-wrap: wrap; }
.footer-links { display:flex; gap: 16px; }

/* ====== Responsive ====== */
@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; }
  .about-grid, .feeds-grid, .links-grid { grid-template-columns: 1fr; }
  .nav-links { display:none; }
}