.intro-content{display:grid;grid-template-columns:auto 1fr;gap:clamp(28px,4vw,56px);align-items:center;max-width:960px}.culture-symbol-box{display:grid;place-items:center;width:clamp(140px,16vw,200px);aspect-ratio:1;background:var(--white);border:1px solid var(--line)}.culture-symbol{display:block;width:70%;height:auto}.title-year{display:block;margin-bottom:4px;font-family:var(--font-serif);font-weight:700;font-size:1.1rem;letter-spacing:.15em;color:var(--shu)}.intro-body p{margin-top:20px;padding-left:20px;border-left:2px solid var(--shu);font-size:1.05rem;line-height:2;color:#45474b}.details-grid{display:grid;grid-template-columns:1fr 1.6fr;gap:clamp(40px,6vw,96px);align-items:start}.details-head{position:sticky;top:calc(var(--header-height) + 40px)}.info-list{border-top:1px solid var(--sumi)}.info-item{display:grid;grid-template-columns:130px 1fr;gap:24px;padding:22px 0;border-bottom:1px solid var(--line)}.info-item dt{font-family:var(--font-serif);font-weight:700;letter-spacing:.1em;color:var(--ai)}.info-item dd{font-size:1rem;line-height:1.9}.info-item small{display:inline-block;margin-top:4px;font-size:.85rem;color:var(--muted)}@media(max-width:960px){.details-grid{grid-template-columns:1fr;gap:32px}.details-head{position:static}}@media(max-width:600px){.intro-content{grid-template-columns:1fr}.info-item{grid-template-columns:1fr;gap:6px}}