.opening{padding-block:48px 32px;max-width:920px}@media (min-width:900px){.opening{padding-block:76px 44px}}.opening-meta-row{display:flex;align-items:center;flex-wrap:wrap;gap:10px 14px;margin-bottom:8px}.opening h1{font-size:clamp(32px,6.6vw,54px);letter-spacing:.02em;line-height:1.32;margin-block:14px 18px;font-weight:700}.opening .lede{max-width:36em;font-size:17.5px;line-height:2.05;color:var(--sumi-2)}.map-stage{padding-bottom:56px;border-bottom:var(--rule)}@media (min-width:900px){.map-stage{padding-bottom:76px}}.home-portals{padding-block:56px 84px}.portal-grid{display:grid;grid-template-columns:1fr;grid-gap:20px;gap:20px;margin-top:24px}@media (min-width:640px){.portal-grid{grid-template-columns:repeat(2,1fr);gap:20px}}@media (min-width:1024px){.portal-grid{grid-template-columns:repeat(4,1fr);gap:22px}}.portal-card{--accent:var(--shu);display:flex;flex-direction:column;justify-content:space-between;padding:26px 24px 22px;background:var(--card);border:1px solid var(--rule-color,rgba(0,0,0,.08));border-top:2.5px solid var(--accent);border-radius:4px;text-decoration:none;color:inherit;box-shadow:0 2px 10px rgba(0,0,0,.03);transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);position:relative;min-height:260px}.portal-accent-ai{--accent:#2b5b84}.portal-accent-shu{--accent:var(--shu,#b4452f)}.portal-accent-kin{--accent:#b08d3c}.portal-accent-sumi{--accent:#4a4e51}@media (hover:hover){.portal-card:hover{transform:translateY(-4px);box-shadow:0 10px 24px rgba(0,0,0,.08);border-color:var(--accent)}}.portal-card-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}.portal-idx-tag{font-family:var(--font-sans);font-size:11px;letter-spacing:.12em;opacity:.9}.portal-idx-tag,.portal-stamp{font-weight:700;color:var(--accent)}.portal-stamp{display:inline-flex;align-items:center;justify-content:center;font-family:var(--font-mincho);font-size:12.5px;letter-spacing:.06em;background:color-mix(in srgb,var(--accent) 8%,transparent);border:1px solid var(--accent);border-radius:2px;padding:1px 6px;line-height:1.2;transition:transform .2s var(--ease)}.portal-card:hover .portal-stamp{transform:scale(1.06)}.portal-card-body{display:flex;flex-direction:column;flex:1 1}.portal-eyebrow{display:block;font-size:11px;font-weight:600;letter-spacing:.08em;color:var(--usu);margin-bottom:8px}.portal-title{font-family:var(--font-mincho);font-size:19px;font-weight:600;color:var(--sumi);line-height:1.4;margin:0 0 10px;letter-spacing:.02em;transition:color .18s var(--ease)}.portal-card:hover .portal-title{color:var(--accent)}.portal-summary{font-size:13px;color:var(--sumi-2);line-height:1.75;margin:0 0 20px;flex:1 1}.portal-card-foot{padding-top:14px;border-top:1px dashed var(--rule-color,rgba(0,0,0,.08));margin-top:auto}.portal-link{display:inline-flex;align-items:center;gap:6px;font-size:12.5px;font-weight:600;color:var(--sumi-2);letter-spacing:.04em;transition:color .18s var(--ease),transform .18s var(--ease)}.portal-card:hover .portal-link{color:var(--accent);transform:translateX(4px)}