.history-switch { position:relative; z-index:12; top:auto; left:auto; display:grid; grid-template-columns:repeat(4,minmax(0,1fr)); width:min(1080px,calc(100% - 38px)); margin:24px auto; transform:none; border:1px solid rgba(255,255,255,.18); background:#101010; }
.history-switch a { display:flex; flex-direction:column; gap:5px; padding:16px 20px; color:#aaa; text-decoration:none; }
.history-switch a+a { border-left:1px solid rgba(255,255,255,.15); }
.history-switch span { color:#c8aa6e; font-size:.72rem; letter-spacing:.22em; }
.history-switch strong { color:#ddd; font-size:.9rem; font-weight:500; letter-spacing:.04em; }
.history-switch small { color:#777; font-size:.76rem; }
.history-switch .is-current { background:rgba(200,170,110,.11); }
.history-switch .is-current strong { color:#fff; }
.acoustic-history-hero { position:relative; min-height:100svh; display:flex; align-items:center; overflow:hidden; }
.acoustic-history-hero>img { position:absolute; inset:0; display:block; width:100%; height:100%; object-fit:cover; object-position:center; }
.acoustic-history-hero .story-hero-shade { position:absolute; inset:0; z-index:1; background:linear-gradient(90deg,rgba(0,0,0,.88) 0%,rgba(0,0,0,.46) 52%,rgba(0,0,0,.3) 100%),linear-gradient(180deg,rgba(0,0,0,.12),rgba(0,0,0,.82)); }
.acoustic-history-hero .story-hero-copy { position:relative; z-index:2; }
.acoustic-history-hero .story-scroll { z-index:2; }
.acoustic-history-page .timeline-year { font-size:1.08rem; line-height:1.5; }
.history-next { text-align:center; border-top:1px solid #242424; }
.history-next h2 { margin:0 0 22px; font-family:Georgia,'Times New Roman',serif; font-size:clamp(1.8rem,3.5vw,3rem); line-height:1.45; font-weight:400; }
.history-next>p:not(.story-label) { max-width:690px; margin:0 auto 34px; color:#aaa; line-height:2.05; }
.acoustic-history-closing>img { object-fit:cover; filter:saturate(.78); }
.acoustic-history-closing .story-closing-shade { background:linear-gradient(90deg,rgba(0,0,0,.93),rgba(0,0,0,.58) 58%,rgba(0,0,0,.22)); }
@media(max-width:700px) {
  .history-switch { top:auto; width:calc(100% - 24px); margin:14px auto 22px; }
  .history-switch { grid-template-columns:repeat(2,1fr); }
  .history-switch a { padding:11px 10px; }
  .history-switch a:nth-child(3) { border-left:0; border-top:1px solid rgba(255,255,255,.15); }
  .history-switch a:nth-child(4) { border-top:1px solid rgba(255,255,255,.15); }
  .history-switch strong { font-size:.8rem; }
  .history-switch small { display:none; }
  .acoustic-history-hero { min-height:82svh; }
  .acoustic-history-hero>img { object-position:62% center; }
  .acoustic-history-hero .story-hero-copy { padding-top:225px; }
  .acoustic-history-hero .story-hero-shade { background:linear-gradient(180deg,rgba(0,0,0,.28),rgba(0,0,0,.48) 42%,rgba(0,0,0,.94)); }
  .history-next { text-align:left; }
  .history-next .story-button { width:100%; box-sizing:border-box; }
}

/* Japanese heading reflow */
.acoustic-history-page h1,.acoustic-history-page h2,.acoustic-history-page h3{line-break:strict;word-break:normal;overflow-wrap:normal;text-wrap:pretty;}
@media(max-width:700px){.acoustic-history-page h2{font-size:clamp(1.5rem,6.45vw,1.8rem);line-height:1.65}.acoustic-history-page h3{line-height:1.75}}