/* XR Pavilion LP
   レイアウトの考え方：展示室を順に歩くように。大きな展示（ビジュアル）と、作品キャプションのような小さく正確な文字を対にする。 */
:root {
  --paper: #f7f4ee;        /* 白〜温かいオフホワイト */
  --paper-2: #efeae1;      /* 区切りの面 */
  --surface: #fffdf9;      /* フォームなど手前の面 */
  --ink: #26231f;          /* 本文 */
  --ink-2: #5f5850;        /* 補足 */
  --line: #d9d1c4;         /* 罫線 */
  --accent: #34544d;       /* 青磁を深くした色：主CTA */
  --accent-ink: #f7f4ee;
  --accent-soft: #dfe7e2;
  --clay: #8d6a4c;         /* 土の色：小さな印 */
  --overlay: rgba(247, 244, 238, 0.86);

  --f-display: "Zen Old Mincho", "Hiragino Mincho ProN", "Yu Mincho", serif;
  --f-body: "Zen Kaku Gothic New", "Hiragino Sans", "Yu Gothic", system-ui, sans-serif;
  --f-mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;

  --gutter: clamp(16px, 4vw, 56px);
  --max: 1280px;
  --radius: 2px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #1d1c1a; --paper-2: #24221f; --surface: #2a2825; --ink: #ece7de; --ink-2: #b4ab9f;
    --line: #3d3933; --accent: #9fc0b6; --accent-ink: #172320; --accent-soft: #2b3a36; --clay: #c49d7b;
    --overlay: rgba(29, 28, 26, 0.86);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --paper: #1d1c1a; --paper-2: #24221f; --surface: #2a2825; --ink: #ece7de; --ink-2: #b4ab9f;
  --line: #3d3933; --accent: #9fc0b6; --accent-ink: #172320; --accent-soft: #2b3a36; --clay: #c49d7b;
  --overlay: rgba(29, 28, 26, 0.86);
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 84px; -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--f-body);
  font-size: 16px;
  line-height: 1.85;
  letter-spacing: 0.02em;
  font-feature-settings: "palt" 0;
  -webkit-font-smoothing: antialiased;
  /* 日本語は文節の切れ目で折り返し、行頭に小書きの仮名や約物を置かない */
  word-break: auto-phrase;
  line-break: strict;
}
img { max-width: 100%; height: auto; display: block; }
[hidden] { display: none !important; }
a { color: inherit; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
h1, h2, h3, h4 { margin: 0; font-weight: 500; text-wrap: balance; }
p, li, dd, summary { text-wrap: pretty; }
.nowrap { white-space: nowrap; }
.contact__title span { display: inline-block; } /* 句の途中で折り返さない */
p { margin: 0; }

.skip { position: absolute; left: -9999px; }
.skip:focus { left: 16px; top: 16px; z-index: 100; background: var(--surface); padding: 8px 12px; }

main > section { padding-inline: var(--gutter); }
main > section > * { max-width: var(--max); margin-inline: auto; }

/* ---------- 文字 ---------- */
.eyebrow, .label {
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-2);
  font-weight: 400;
}
.eyebrow { font-family: var(--f-body); text-transform: none; letter-spacing: 0.12em; font-size: 13px; font-weight: 500; color: var(--clay); }
.label { display: inline-flex; align-items: center; gap: 10px; }
.label::before { content: ""; width: 24px; height: 1px; background: currentColor; }
.h2 { font-family: var(--f-display); font-size: clamp(28px, 3.6vw, 44px); line-height: 1.45; letter-spacing: 0.04em; }
.h3 { font-family: var(--f-display); font-size: clamp(22px, 2.3vw, 30px); line-height: 1.55; letter-spacing: 0.04em; }
.h4 { font-family: var(--f-display); font-size: 21px; line-height: 1.5; }
.body-l { font-size: clamp(15px, 1.2vw, 17px); line-height: 2; color: var(--ink-2); max-width: 36em; }
.body-m { font-size: 15px; line-height: 1.95; color: var(--ink-2); max-width: 34em; }

/* ---------- ボタン ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 52px; padding: 0 28px;
  font: 500 15px/1.2 var(--f-body); letter-spacing: 0.06em;
  text-decoration: none; border-radius: var(--radius); border: 1px solid transparent;
  cursor: pointer; transition: background-color .2s, color .2s, border-color .2s, transform .2s;
  white-space: nowrap;
}
.btn--primary { background: var(--accent); color: var(--accent-ink); }
.btn--primary::after { content: "→"; font-family: var(--f-mono); transition: transform .2s; }
.btn--primary:hover { background: var(--ink); }
.btn--primary:hover::after { transform: translateX(3px); }
.btn--ghost { border-color: var(--ink); color: var(--ink); background: transparent; }
.btn--ghost:hover { background: var(--ink); color: var(--paper); }
.btn--sm { min-height: 42px; padding: 0 18px; font-size: 14px; }
.btn--block { width: 100%; }

/* ---------- ヘッダー ---------- */
.site-header {
  position: sticky; top: env(safe-area-inset-top, 0px); z-index: 50;
  padding-inline: var(--gutter);
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
  transition: border-color .3s;
}
.site-header.is-scrolled { border-bottom-color: var(--line); }
.site-header__inner { max-width: calc(var(--max) + 160px); margin: 0 auto; height: 68px; display: flex; align-items: center; gap: 32px; }
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink); white-space: nowrap; flex: none; }
.brand__mark { width: 26px; height: 26px; color: var(--accent); flex: none; }
.brand__name { font-family: var(--f-display); font-size: 20px; letter-spacing: 0.06em; font-weight: 700; }
.brand__by { font-family: var(--f-mono); font-size: 11px; color: var(--ink-2); letter-spacing: 0.06em; padding-left: 10px; border-left: 1px solid var(--line); }
.site-nav { display: flex; gap: 26px; margin-left: auto; font-size: 14px; }
.site-nav a { text-decoration: none; color: var(--ink-2); position: relative; }
.site-nav a:hover { color: var(--ink); }
.site-nav a::after { content: ""; position: absolute; left: 0; right: 100%; bottom: -4px; height: 1px; background: currentColor; transition: right .25s; }
.site-nav a:hover::after { right: 0; }
@media (max-width: 1080px) { .site-nav { display: none; } .site-header .btn { margin-left: auto; } }
@media (max-width: 560px) {
  .brand__by { display: none; }
  .brand__name { font-size: 17px; }
  .site-header__inner { height: 58px; }
  .site-header .btn { min-height: 38px; padding: 0 14px; font-size: 13px; }
  .site-header .btn::after { display: none; }
}

/* ---------- ファーストビュー ---------- */
.hero {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  gap: clamp(28px, 4vw, 64px);
  align-items: center;
  padding-block: clamp(16px, 3vw, 40px) clamp(56px, 7vw, 104px);
  max-width: calc(var(--max) + 2 * var(--gutter));
  margin-inline: auto;
}
main > section.hero > * { max-width: none; margin: 0; }
.hero__copy { display: grid; gap: 26px; align-content: center; padding-block: 24px; }
.hero__title {
  font-family: var(--f-display); font-weight: 500;
  font-size: clamp(28px, 2.75vw, 44px); line-height: 1.5; letter-spacing: 0.05em;
}
.hero__title span { display: inline-block; } /* 句の途中で折り返さない */
.hero__lead { font-size: clamp(15px, 1.15vw, 17px); line-height: 2; color: var(--ink-2); max-width: 30em; }
.hero__lead strong { color: var(--ink); font-weight: 700; background: linear-gradient(transparent 62%, var(--accent-soft) 62%); }
.hero__actions { display: flex; flex-wrap: wrap; gap: 12px; }

.hero__visual { position: relative; margin: 0; padding-bottom: 56px; }

/* 架空のブランドサイト（商品ページ・沿革ページ共通の部品）。サイトの中なので、LPのテーマに関わらず明るい配色に固定 */
.hero__visual > .site { margin-right: 7%; }
.site { position: relative; background: #fffdf9; color: #26231f; box-shadow: 0 40px 80px -40px rgba(50, 35, 20, 0.45), 0 0 0 1px rgba(60, 45, 30, 0.08); }
.site__head { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 14px clamp(16px, 2.4vw, 28px); border-bottom: 1px solid #ebe5da; }
.site__logo { display: inline-flex; align-items: baseline; gap: 8px; font-family: var(--f-display); font-weight: 700; font-size: 15px; letter-spacing: 0.22em; }
.site__logo small { font-family: var(--f-mono); font-weight: 400; font-size: 9px; letter-spacing: 0.16em; color: #7a7066; }
.site__nav { display: flex; gap: 18px; font-size: 11.5px; color: #6b635a; }
.site__nav .is-on { color: #26231f; border-bottom: 1px solid #26231f; }
.site__body { padding: 16px clamp(16px, 2.4vw, 28px) 20px; display: grid; gap: 14px; }
.site__crumb { font-size: 10.5px; color: #8a8076; letter-spacing: 0.06em; }
.site__titlerow { display: flex; flex-wrap: wrap; align-items: baseline; gap: 4px 18px; }
.site__h { font-family: var(--f-display); font-size: clamp(18px, 1.7vw, 24px); letter-spacing: 0.06em; }
.site__lead { font-size: 12px; color: #6b635a; }
.site__foot { display: flex; flex-wrap: wrap; align-items: center; gap: 12px 28px; }
.site__spec { display: flex; flex-wrap: wrap; gap: 6px 22px; margin: 0; font-size: 11.5px; }
.site__spec div { display: flex; gap: 8px; }
.site__spec dt { color: #8a8076; }
.site__spec dd { margin: 0; font-family: var(--f-mono); font-size: 11px; }
.site__btn { font-size: 11.5px; background: #26231f; color: #fffdf9; padding: 9px 16px; }

/* 組み込んだ体験（XR Pavilionの制作範囲） */
.embed { position: relative; outline: 1.5px dashed var(--accent); outline-offset: 5px; }
.embed__label {
  position: absolute; left: 10px; top: -12px; z-index: 4; margin: 0;
  font-size: 11px; font-weight: 700; letter-spacing: 0.04em; color: var(--accent-ink);
  background: var(--accent); padding: 5px 10px; white-space: nowrap;
}
.stage__canvas {
  position: relative; width: 100%; aspect-ratio: 16 / 9;
  background: #ece5d9 url("../img/poster-hero.jpg") center / cover no-repeat;
  overflow: hidden;
}
.stage__canvas canvas { display: block; width: 100% !important; height: 100% !important; opacity: 0; transition: opacity .8s; touch-action: pan-y; }
.stage.is-ready .stage__canvas canvas { opacity: 1; }
.stage__canvas::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: radial-gradient(120% 90% at 50% 45%, transparent 60%, rgba(60, 45, 30, 0.12));
}
.stage__hotspots { position: absolute; inset: 0; pointer-events: none; overflow: hidden; }
.hotspot {
  position: absolute; left: 0; top: 0; pointer-events: auto;
  display: inline-flex; align-items: center; gap: 8px;
  padding: 0; border: 0; background: none; cursor: pointer; color: #26231f;
  font: 500 12px/1 var(--f-body); letter-spacing: 0.08em;
  transition: opacity .3s;
}
.hotspot__dot { width: 22px; height: 22px; border-radius: 50%; background: rgba(255, 253, 249, 0.92); box-shadow: 0 1px 6px rgba(40, 30, 20, 0.25); display: grid; place-items: center; flex: none; }
.hotspot__dot::after { content: ""; width: 7px; height: 7px; border-radius: 50%; background: #34544d; animation: pulse 2.4s ease-in-out infinite; }
.hotspot__label { background: rgba(255, 253, 249, 0.92); padding: 6px 10px; border-radius: 2px; white-space: nowrap; box-shadow: 0 1px 6px rgba(40, 30, 20, 0.12); }
.hotspot.is-flip { flex-direction: row-reverse; transform-origin: right; }
.hotspot[aria-expanded="true"] .hotspot__dot::after { background: #8d6a4c; }
@keyframes pulse { 50% { transform: scale(1.5); opacity: .6; } }
@media (prefers-reduced-motion: reduce) { .hotspot__dot::after { animation: none; } }

.stage__info {
  position: absolute; right: 12px; top: 12px; z-index: 3; width: min(270px, calc(100% - 24px));
  background: rgba(255, 253, 249, 0.92); color: #26231f; backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
  padding: 16px 18px; display: grid; gap: 6px; border-top: 2px solid #34544d;
  box-shadow: 0 10px 40px rgba(40, 30, 20, 0.14);
}
.stage__info-close { position: absolute; right: 6px; top: 4px; border: 0; background: none; font-size: 20px; cursor: pointer; color: #5f5850; width: 32px; height: 32px; }
.stage__info-kind { font-family: var(--f-mono); font-size: 10.5px; letter-spacing: 0.14em; color: #8d6a4c; }
.stage__info-name { font-family: var(--f-display); font-size: 16px; line-height: 1.5; }
.stage__info-note { font-size: 12.5px; line-height: 1.75; color: #5f5850; }
.stage__info-link { font-size: 12.5px; font-weight: 500; color: #34544d; text-decoration: none; display: inline-flex; gap: 6px; }
.spec { display: grid; grid-template-columns: auto 1fr; gap: 2px 14px; margin: 2px 0; font-family: var(--f-mono); font-size: 11.5px; line-height: 1.7; }
.spec dt { color: #5f5850; }
.spec dd { margin: 0; font-variant-numeric: tabular-nums; }

/* 体験の中の操作（組み込まれた側のUI） */
.stage__tabs { position: absolute; left: 10px; bottom: 10px; z-index: 2; display: flex; gap: 4px; padding: 4px; background: rgba(255, 253, 249, 0.86); backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px); border-radius: 99px; }
.stage__tabs button {
  border: 0; background: transparent; color: #5f5850;
  font: 500 12px/1 var(--f-body); letter-spacing: 0.04em; padding: 8px 12px; border-radius: 99px; cursor: pointer;
  transition: all .2s;
}
.stage__tabs button:hover { color: #26231f; }
.stage__tabs button[aria-selected="true"] { background: #26231f; color: #fffdf9; }
.stage__hint { position: absolute; right: 10px; top: 10px; z-index: 2; margin: 0; font-family: var(--f-mono); font-size: 10.5px; color: #4a443d; letter-spacing: 0.06em; background: rgba(255, 253, 249, 0.8); padding: 4px 8px; pointer-events: none; }
.stage__touch { display: none; }

/* 同じサイトの沿革ページ（小さく重ねる） */
.site-mini {
  position: absolute; right: 0; bottom: 0; z-index: 5; width: min(220px, 34%);
  display: grid; text-decoration: none; color: #26231f; background: #fffdf9;
  box-shadow: 0 24px 48px -20px rgba(50, 35, 20, 0.5), 0 0 0 1px rgba(60, 45, 30, 0.08);
  transition: transform .25s;
}
.site-mini:hover { transform: translateY(-4px); }
.site-mini__head { display: flex; justify-content: space-between; gap: 8px; padding: 7px 10px; border-bottom: 1px solid #ebe5da; font-size: 9.5px; color: #6b635a; }
.site-mini__head span:first-child { font-family: var(--f-display); font-weight: 700; letter-spacing: 0.2em; color: #26231f; }
.site-mini__img { position: relative; display: block; }
.site-mini__img img { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; }
.site-mini__era { position: absolute; left: 10px; bottom: 8px; font-family: var(--f-display); font-size: 15px; color: #fbf3e2; text-shadow: 0 1px 8px rgba(0, 0, 0, .5); letter-spacing: 0.08em; }
.site-mini__text { display: grid; gap: 1px; padding: 9px 10px 10px; }
.site-mini__kind { font-size: 12px; font-weight: 700; }
.site-mini__go { font-size: 11.5px; color: #34544d; }

@media (max-width: 1100px) { .site__nav span:not(.is-on):nth-child(n+3) { display: none; } }
@media (max-width: 900px) {
  .hero { grid-template-columns: minmax(0, 1fr); gap: 20px; }
  .hero__copy { display: contents; }
  .eyebrow { order: 1; margin-top: 12px; }
  .hero__title { order: 2; }
  .hero__lead { order: 3; }
  main > section.hero > .hero__visual { order: 4; margin-top: 8px; padding-bottom: 0; }
  .hero__visual > .site { margin-right: 0; }
  .hero__actions { order: 5; }
  .hero__actions .btn { flex: 1 1 auto; }
  .site-mini { position: static; width: auto; margin-top: 14px; grid-template-columns: 112px 1fr; align-items: center; }
  .site-mini__head { display: none; }
  .site-mini__era { font-size: 12px; left: 6px; bottom: 4px; }
  .stage__hint { display: none; }
  .stage__touch {
    display: inline-flex; position: absolute; right: 10px; bottom: 10px; z-index: 2; align-items: center;
    border: 0; background: rgba(255, 253, 249, 0.9); color: #26231f;
    font: 500 12px/1 var(--f-body); padding: 10px 12px; border-radius: 99px; cursor: pointer;
  }
  .stage__touch[aria-pressed="true"] { background: #26231f; color: #fffdf9; }
}
@media (max-width: 560px) {
  .site__body { gap: 12px; }
  .site__lead { display: none; }
  .site__nav { gap: 12px; }
  .stage__canvas { aspect-ratio: 4 / 3.4; }
  .stage__tabs { left: 8px; bottom: 8px; }
  .stage__tabs button { padding: 8px 9px; font-size: 11.5px; }
  .stage__touch { bottom: 52px; right: 8px; }
  .embed__label { font-size: 11px; }
  .stage__info { left: 8px; right: 8px; top: auto; bottom: 8px; width: auto; }
}

/* ---------- セクション見出し ---------- */
.section-head { display: grid; gap: 20px; margin-bottom: clamp(40px, 6vw, 80px) !important; }
.section-head--row { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); align-items: end; gap: 20px 48px; }
.section-head--row > div { display: grid; gap: 20px; }
@media (max-width: 900px) { .section-head--row { grid-template-columns: minmax(0, 1fr); } }

/* ---------- ユースケース ---------- */
.usecases { padding-block: clamp(80px, 11vw, 150px); background: var(--paper-2); }
.case { display: grid; grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); gap: clamp(28px, 4.5vw, 72px); align-items: start; }
.case + .case { margin-top: clamp(72px, 10vw, 136px) !important; padding-top: clamp(72px, 10vw, 136px); border-top: 1px solid var(--line); }
.case--flip { grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); }
.case--flip .case__visual { order: 2; }
.case__visual { display: grid; gap: 16px; min-width: 0; }
.case__text { display: grid; gap: 18px; min-width: 0; }
.case__kicker { font-family: var(--f-mono); font-size: 11.5px; letter-spacing: 0.14em; color: var(--clay); }
.case__lead { font-size: 15px; line-height: 2; color: var(--ink-2); }
.case__meta { display: grid; grid-template-columns: auto 1fr; gap: 8px 18px; margin: 0; font-size: 13.5px; line-height: 1.8; }
.case__meta dt { color: var(--ink-2); font-size: 12px; padding-top: 1px; }
.case__meta dd { margin: 0; }
.case__note { font-size: 12px; line-height: 1.8; color: var(--ink-2); }
.case__links { display: flex; flex-wrap: wrap; gap: 8px 24px; }
.case__cta, .case__demo { font-size: 14.5px; font-weight: 700; color: var(--accent); text-decoration: none; border-bottom: 1px solid currentColor; padding-bottom: 2px; }
.case__cta:hover { color: var(--ink); }
.case__spaces { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; }
.case__spaces img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; }
.case__spaces span { display: block; padding-top: 6px; font-size: 11.5px; color: var(--ink-2); }
@media (max-width: 900px) {
  .case, .case--flip { grid-template-columns: minmax(0, 1fr); }
  .case--flip .case__visual { order: 0; }
}
.browser { background: var(--surface); border: 1px solid var(--line); box-shadow: 0 30px 60px -30px rgba(50, 35, 20, 0.35); }
.browser__bar { display: flex; align-items: center; gap: 14px; padding: 10px 14px; border-bottom: 1px solid var(--line); }
.browser__dots { display: flex; gap: 6px; }
.browser__dots i { width: 9px; height: 9px; border-radius: 50%; background: var(--line); }
.browser__url { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-family: var(--f-mono); font-size: 11.5px; color: var(--ink-2); background: var(--paper-2); padding: 5px 12px; border-radius: 99px; }
.browser__view { position: relative; aspect-ratio: 16 / 10; overflow: hidden; background: #ece5d9; }
.exp-img { width: 100%; height: 100%; object-fit: cover; transition: transform 1.1s cubic-bezier(.2,.7,.2,1), opacity .4s; }
.browser__view[data-view="2"] .exp-img,
.browser__view[data-view="3"] .exp-img { transform: scale(1.04); }
.exp-layer { position: absolute; inset: 0; opacity: 0; pointer-events: none; transition: opacity .45s; }
.browser__view[data-view="3"] .exp-layer--3,
.browser__view[data-view="4"] .exp-layer--4 { opacity: 1; }
.mini-info { position: absolute; right: 5%; top: 8%; width: min(46%, 260px); background: rgba(255, 253, 249, 0.92); color: #26231f; padding: 16px 18px; display: grid; gap: 4px; border-top: 2px solid #34544d; box-shadow: 0 10px 30px rgba(40,30,20,.16); }
.mini-info__kind { font-family: var(--f-mono); font-size: 10px; letter-spacing: .14em; color: #8d6a4c; }
.mini-info__name { font-family: var(--f-display); font-size: clamp(13px, 1.3vw, 16px); line-height: 1.5; }
.mini-info__spec { font-family: var(--f-mono); font-size: 10.5px; color: #5f5850; }
.mini-info__link { font-size: 12px; font-weight: 700; color: #34544d; margin-top: 4px; }
.mock-pdp { position: absolute; inset: 0; background: #fffdf9; color: #26231f; display: grid; grid-template-columns: 1.1fr 1fr; }
.mock-pdp__img img { width: 100%; height: 100%; object-fit: cover; }
.mock-pdp__text { padding: 8% 7%; display: grid; align-content: center; gap: 10px; }
.mock-pdp__brand { font-family: var(--f-mono); font-size: 10px; letter-spacing: .14em; color: #5f5850; }
.mock-pdp__name { font-family: var(--f-display); font-size: clamp(15px, 1.8vw, 22px); }
.mock-pdp__price { font-family: var(--f-mono); font-size: 13px; }
.mock-pdp__btn { background: #26231f; color: #fffdf9; font-size: 12px; text-align: center; padding: 9px; margin-top: 6px; }
.mock-pdp__note { font-size: 10.5px; color: #5f5850; line-height: 1.6; }
.browser__badge {
  position: absolute; left: 12px; bottom: 12px; z-index: 2;
  font-size: 11px; font-weight: 500; letter-spacing: 0.04em; color: #26231f;
  background: rgba(255, 253, 249, 0.92); padding: 6px 10px; border-left: 3px solid #8d6a4c;
}
.steps { list-style: none; margin: 0; padding: 0; display: grid; border-top: 1px solid var(--line); }
.steps li { border-bottom: 1px solid var(--line); }
.steps button {
  width: 100%; text-align: left; background: none; border: 0; color: var(--ink); cursor: pointer;
  display: grid; grid-template-columns: 40px 1fr; gap: 2px 8px; padding: 18px 4px; font: inherit;
}
.steps__n { grid-row: span 2; font-family: var(--f-display); font-size: 26px; line-height: 1.1; color: var(--line); transition: color .2s; }
.steps__t { font-weight: 700; font-size: 16px; }
.steps__d { font-size: 13.5px; line-height: 1.8; color: var(--ink-2); max-height: 0; overflow: hidden; opacity: 0; transition: max-height .4s, opacity .3s; }
.steps button[aria-selected="true"] .steps__n { color: var(--accent); }
.steps button[aria-selected="true"] .steps__d { max-height: 120px; opacity: 1; padding-top: 4px; }
.steps button:hover .steps__n { color: var(--ink-2); }
@media (max-width: 900px) {
  .browser { margin-inline: calc(-1 * var(--gutter) / 2); }
  .steps__d { max-height: none; opacity: 1; }
}

/* 歴史・沿革：架空の会社（山景製陶）の沿革ページ。枠の中をスクロールして読み、1958年の写真の中へ入る */
.hpage { background: #faf7f1; color: #26231f; }
.hpage .site__logo { font-size: 16px; letter-spacing: 0.24em; }
.hpage__view { position: relative; height: clamp(440px, 64vh, 580px); overflow: hidden; }
.hpage__scroll { position: absolute; inset: 0; overflow-y: auto; overscroll-behavior-y: auto; scrollbar-width: thin; touch-action: pan-y; }
.hpage__scroll:focus-visible { outline: 2px solid #34544d; outline-offset: -3px; }
.hist { padding: 20px clamp(16px, 3vw, 32px) 48px; }
.hist__title { font-family: var(--f-display); font-size: clamp(26px, 3vw, 36px); letter-spacing: 0.08em; margin-top: 10px; }
.hist__sub { font-family: var(--f-display); font-size: clamp(14px, 1.4vw, 17px); letter-spacing: 0.08em; margin-top: 6px; color: #3d3833; }
.hist__intro { font-size: 12.5px; line-height: 2; color: #5f5850; margin-top: 12px; max-width: 32em; }
.hist__list { list-style: none; margin: 24px 0 0; padding: 0 0 0 22px; border-left: 1px solid #cfc5b6; display: grid; gap: 28px; }
.hist__item { position: relative; display: grid; grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr); gap: 4px 20px; align-content: start; }
.hist__item::before { content: ""; position: absolute; left: -26px; top: 12px; width: 7px; height: 7px; border-radius: 50%; background: #8d6a4c; }
.hist__head { grid-column: 1; display: flex; flex-wrap: wrap; align-items: baseline; gap: 4px 14px; }
.hist__year { font-family: var(--f-display); font-size: clamp(22px, 2.4vw, 28px); letter-spacing: 0.04em; font-variant-numeric: tabular-nums; }
.hist__h { font-family: var(--f-display); font-size: clamp(14px, 1.3vw, 16px); letter-spacing: 0.06em; }
.hist__text { grid-column: 1; font-size: 12px; line-height: 1.95; color: #5f5850; }
.hist__photo { grid-column: 2; grid-row: 1 / span 2; width: 100%; aspect-ratio: 16 / 8.6; object-fit: cover; display: block; }
/* 1958年：スクロールの間とどまり、写真の中へ入る */
.hist__item--enter { display: block; }
.hist__pin { position: sticky; top: 0; height: var(--view-h, 480px); display: grid; grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr); gap: 4px 20px; align-content: center; margin-top: -24px; }
.hist__pin::before { content: ""; position: absolute; left: -26px; top: calc(50% - 32px); width: 7px; height: 7px; border-radius: 50%; background: #34544d; box-shadow: 0 0 0 4px rgba(52, 84, 77, 0.18); }
.hist__photo--enter { position: relative; cursor: zoom-in; aspect-ratio: 16 / 9; }
.hist__photo--enter img { width: 100%; height: 100%; object-fit: cover; display: block; }
.hist__enter { position: absolute; right: 10px; bottom: 9px; font-family: var(--f-display); font-size: 11.5px; letter-spacing: 0.08em; color: #fbf3e2; text-shadow: 0 1px 8px rgba(0, 0, 0, .6); }

/* 写真の中（WebGL）。とどまっている間だけ、枠の上に重ねる */
.journey { --world-op: 0; --sepia: 1; --text-op: 0; --p: 0; position: absolute; inset: 0; z-index: 3; pointer-events: none; overflow: hidden; }
.journey__world { position: absolute; inset: 0; opacity: var(--world-op); filter: sepia(var(--sepia)) saturate(calc(1 - var(--sepia) * 0.4)); }
.journey__world canvas { display: block; width: 100% !important; height: 100% !important; }
.journey__dust { position: absolute; inset: 0; width: 100%; height: 100%; mix-blend-mode: screen; opacity: 0; transition: opacity .8s; }
.journey__zoom { position: absolute; left: 0; top: 0; overflow: hidden; box-shadow: 0 18px 40px -16px rgba(40, 28, 16, 0.5); }
.journey__zoom img { width: 100%; height: 100%; object-fit: cover; display: block; }
.journey__text { position: absolute; left: 4.5%; top: 6%; color: #fbf6ec; text-shadow: 0 1px 14px rgba(20, 14, 8, 0.7); opacity: var(--text-op); }
.journey__year { font-family: var(--f-display); font-size: clamp(20px, 2.6vw, 32px); letter-spacing: 0.1em; line-height: 1.2; }
.journey__line { font-size: clamp(11px, 1.05vw, 13.5px); margin-top: 4px; letter-spacing: 0.06em; }
.journey__bar { position: absolute; left: 0; right: 0; bottom: 0; height: 3px; background: rgba(255, 253, 249, 0.35); opacity: var(--text-op); }
.journey__bar span { display: block; height: 100%; width: calc(var(--p) * 100%); background: #34544d; }
.hpage__view .browser__badge { z-index: 5; }
.journey__hint {
  position: absolute; right: 12px; bottom: 12px; z-index: 6; margin: 0; pointer-events: none;
  display: inline-flex; align-items: center; gap: 8px; white-space: nowrap;
  font-size: 11.5px; font-weight: 500; letter-spacing: 0.06em; color: #fffdf9;
  background: rgba(38, 35, 31, 0.78); padding: 7px 13px; border-radius: 99px; transition: opacity .4s;
}
.journey__hint b { font-weight: 400; display: inline-block; animation: nudge 1.6s ease-in-out infinite; }
.hpage[data-state="inside"] .journey__hint b { display: none; }
.hpage.hint-off .journey__hint { opacity: 0; }
@keyframes nudge { 50% { transform: translateY(4px); } }
@media (prefers-reduced-motion: reduce) { .journey__hint b { animation: none; } }

/* 空間の中の説明：その場所に近づくと現れる */
.journey__tips { position: absolute; inset: 0; overflow: hidden; }
.tip { position: absolute; left: 0; top: 0; --near: 0; opacity: var(--near); }
.tip__dot {
  position: absolute; left: -10px; top: -10px; width: 20px; height: 20px; border-radius: 50%;
  border: 1.5px solid rgba(255, 253, 249, 0.95); background: #34544d;
  box-shadow: 0 0 0 calc(10px * var(--near)) rgba(255, 253, 249, 0.18);
}
.tip__dot::after { content: ""; position: absolute; inset: 5px; border-radius: 50%; background: #fffdf9; }
.tip__panel {
  position: absolute; left: 18px; bottom: 16px; width: max-content; max-width: min(250px, 50vw);
  background: rgba(255, 253, 249, 0.93); color: #26231f; padding: 10px 13px 11px; border-left: 2px solid #34544d;
  box-shadow: 0 10px 28px -10px rgba(20, 14, 8, 0.5);
  transform: translate(var(--dx, 0px), calc((1 - var(--near)) * 8px));
}
.tip__panel::before { content: ""; position: absolute; left: -18px; bottom: -16px; width: 20px; height: 1px; background: rgba(255, 253, 249, 0.9); transform-origin: left; transform: rotate(-42deg); }
.tip.is-left .tip__panel { left: auto; right: 18px; border-left: 0; border-right: 2px solid #34544d; text-align: right; }
.tip.is-left .tip__panel::before { left: auto; right: -18px; transform-origin: right; transform: rotate(42deg); }
.tip__title { font-family: var(--f-display); font-size: 14px; letter-spacing: 0.06em; }
.tip__text { font-size: 11.5px; line-height: 1.7; color: #4a443d; margin-top: 2px; }
@media (max-width: 560px) {
  .hpage__view { height: min(560px, 76vh); }
  .hist__item, .hist__pin { grid-template-columns: minmax(0, 1fr); }
  .hist__photo { grid-column: 1; grid-row: auto; margin-top: 6px; }
  .hist__pin { align-content: center; }
  .hpage .site__nav span:not(.is-on) { display: none; }
  .journey__hint { right: 50%; transform: translateX(50%); }
  .tip__panel { max-width: 56vw; padding: 8px 10px; }
  .tip__title { font-size: 13px; }
  .tip__text { font-size: 11px; }
}

/* ---------- 流れ ---------- */
.flow { padding-block: clamp(80px, 10vw, 140px); }
.flow__list { list-style: none; padding: 0; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 0; }
.flow__list li { position: relative; padding: 0 clamp(12px, 1.6vw, 24px) 0 0; display: grid; gap: 10px; align-content: start; min-width: 0; }
.flow__list li::before { content: ""; position: absolute; left: 30px; right: 0; top: 15px; height: 1px; background: var(--line); }
.flow__list li:last-child::before { display: none; }
.flow__n { position: relative; width: 31px; height: 31px; border-radius: 50%; border: 1px solid var(--ink); display: grid; place-items: center; font-family: var(--f-mono); font-size: 13px; background: var(--paper-2); }
.flow__list h3 { font-size: 16px; font-weight: 700; margin-top: 10px; }
.flow__list p { font-size: 13.5px; line-height: 1.9; color: var(--ink-2); }
.flow__cta { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 20px; margin-top: clamp(48px, 6vw, 80px) !important; padding-top: 32px; border-top: 1px solid var(--line); }
.flow__cta p { font-family: var(--f-display); font-size: clamp(19px, 2vw, 24px); }
@media (max-width: 900px) {
  .flow__list { grid-template-columns: minmax(0, 1fr); gap: 26px; }
  .flow__list li { grid-template-columns: 31px 1fr; column-gap: 16px; padding: 0; }
  .flow__list li > :not(.flow__n) { grid-column: 2; }
  .flow__n { grid-row: span 2; }
  .flow__list h3 { margin-top: 3px; }
  .flow__list li::before { left: 15px; right: auto; top: 31px; bottom: -26px; width: 1px; height: auto; }
  .flow__cta .btn { width: 100%; }
}

/* ---------- FAQ ---------- */
.faq { padding-block: clamp(72px, 9vw, 120px); border-top: 1px solid var(--line); display: grid; grid-template-columns: minmax(0, 4fr) minmax(0, 8fr); gap: 32px clamp(32px, 5vw, 80px); max-width: calc(var(--max) + 2 * var(--gutter)); margin-inline: auto; }
main > section.faq > * { margin: 0; max-width: none; }
.faq__head { display: grid; gap: 20px; align-content: start; position: sticky; top: 100px; }
.faq__list { border-top: 1px solid var(--ink); }
.faq details { border-bottom: 1px solid var(--line); }
.faq summary { list-style: none; cursor: pointer; display: flex; justify-content: space-between; gap: 20px; padding: 22px 4px; font-weight: 500; font-size: 16px; line-height: 1.7; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; font-family: var(--f-mono); font-size: 20px; line-height: 1.3; color: var(--ink-2); transition: transform .25s; flex: none; }
.faq details[open] summary::after { transform: rotate(45deg); }
.faq details p { padding: 0 40px 24px 4px; font-size: 14.5px; line-height: 2; color: var(--ink-2); max-width: 40em; }
@media (max-width: 900px) { .faq { grid-template-columns: minmax(0, 1fr); } .faq__head { position: static; } }

/* ---------- 相談 ---------- */
.contact {
  padding-block: clamp(80px, 11vw, 160px);
  display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 6fr); gap: 40px clamp(32px, 6vw, 96px);
  max-width: calc(var(--max) + 2 * var(--gutter)); margin-inline: auto;
  border-top: 1px solid var(--line);
}
main > section.contact > * { margin: 0; max-width: none; }
.contact__intro { display: grid; gap: 24px; align-content: start; }
.contact__title { font-family: var(--f-display); font-size: clamp(28px, 3.4vw, 44px); line-height: 1.5; letter-spacing: 0.04em; }
.contact__topics { list-style: none; padding: 0; margin: 8px 0 0; display: grid; gap: 0; border-top: 1px solid var(--line); }
.contact__topics li { padding: 12px 0 12px 22px; border-bottom: 1px solid var(--line); font-size: 14.5px; position: relative; }
.contact__topics li::before { content: "?"; position: absolute; left: 0; font-family: var(--f-mono); color: var(--clay); }
.form { background: var(--surface); border: 1px solid var(--line); padding: clamp(22px, 3.4vw, 44px); display: grid; gap: 22px; align-content: start; }
.field { display: grid; gap: 8px; border: 0; padding: 0; margin: 0; min-width: 0; }
.field label, .field legend { font-size: 13px; font-weight: 500; padding: 0; }
.field legend { margin-bottom: 8px; }
.field-row { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 22px; }
input[type="text"], input[type="email"], textarea {
  width: 100%; font: 16px/1.6 var(--f-body); color: var(--ink); background: var(--paper);
  border: 1px solid var(--line); border-radius: var(--radius); padding: 12px 14px;
}
input:focus, textarea:focus { outline: 2px solid var(--accent); outline-offset: 0; border-color: transparent; }
textarea { resize: vertical; }
textarea::placeholder { color: var(--ink-2); opacity: .7; font-size: 14px; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip input { position: absolute; opacity: 0; pointer-events: none; }
.chip span { display: inline-block; padding: 8px 14px; border: 1px solid var(--line); border-radius: 99px; font-size: 13.5px; cursor: pointer; transition: all .15s; }
.chip input:checked + span { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.chip input:focus-visible + span { outline: 2px solid var(--accent); outline-offset: 2px; }
.field__opt { margin-left: 8px; font-size: 11.5px; font-weight: 400; color: var(--ink-2); }
input[aria-invalid="true"], textarea[aria-invalid="true"] { border-color: var(--clay); }
.form__note { font-size: 12.5px; line-height: 1.8; color: var(--ink-2); margin: 0; }
.form__note a { color: inherit; text-decoration: underline; text-underline-offset: 3px; }
.form__status { white-space: pre-line; font-size: 13.5px; line-height: 1.8; padding: 12px 16px; background: var(--accent-soft); }
.form__status[data-type="error"] { background: transparent; border: 1px solid var(--clay); color: var(--ink); }
.btn:disabled { opacity: .6; cursor: progress; }
@media (max-width: 900px) { .contact { grid-template-columns: minmax(0, 1fr); } }
@media (max-width: 560px) { .field-row { grid-template-columns: minmax(0, 1fr); } }

/* ---------- 提供会社・フッター ---------- */
.site-footer { padding: 40px var(--gutter) calc(40px + env(safe-area-inset-bottom, 0px)); display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 16px; background: var(--paper-2); }
.site-footer__org { font-size: 13px; color: var(--ink-2); margin-left: auto; }
.site-footer__org a { color: var(--ink); text-underline-offset: 3px; }
.site-footer__org a:hover { color: var(--accent); }
.site-footer__copy { font-family: var(--f-mono); font-size: 11.5px; color: var(--ink-2); }
@media (max-width: 560px) { .site-footer__org { margin-left: 0; flex-basis: 100%; } }

/* ---------- スマホ用の固定CTA ---------- */
.mobile-cta { display: none; }
@media (max-width: 760px) {
  .mobile-cta {
    display: flex; gap: 8px; position: fixed; left: 0; right: 0; bottom: 0; z-index: 60;
    padding: 10px 12px calc(10px + env(safe-area-inset-bottom, 0px));
    background: color-mix(in srgb, var(--paper) 94%, transparent); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
    border-top: 1px solid var(--line);
    transform: translateY(110%); transition: transform .35s;
  }
  .mobile-cta.is-visible { transform: none; }
  .mobile-cta .btn--primary { flex: 1; min-height: 48px; }
  .site-footer { padding-bottom: calc(110px + env(safe-area-inset-bottom, 0px)); }
}