/* ============================================================
   Aoki Tech Studio — base.css
   デザイン憲法: _notes/design-constitution.md（2026-08-04 実測）
   トークン/FV ＋ フィード構造
   ============================================================ */

/* ---------- Tokens ---------- */
:root {
  --bg: #f2f2f2;
  --surface: #e9e9e9;
  --white: #ffffff;
  --ink: #0d0d0d;
  --ink-dark: #121212;
  --gold: #c2924d;
  --gold-line: rgba(200, 158, 98, 0.3);
  --gold-line-strong: rgba(200, 158, 98, 0.55);
  --muted: #6b6b6b;
  --muted-2: #6b6b6b;
  --line: #d6d6d6;
  --line-form: #8a8a8a;
  /* 明るい面で文字に使う金（AA準拠）。罫線・小面は --gold のまま */
  --gold-text: #7d5c24;
  --gold-lg: #a97e3d;

  --font-jp: 'Shippori Mincho', 'Hiragino Mincho ProN', 'Yu Mincho', serif;
  --font-en: 'Cormorant', Georgia, serif;

  --container: 1600px;
  --gutter: 32px;

  --ease-drama: cubic-bezier(0.93, 0, 0.1, 1);
  --ease-reveal: cubic-bezier(0.26, 0.06, 0, 1);
  --ease-bounce: cubic-bezier(0.34, 1.56, 0.64, 1);

  --band: clamp(100px, 12vw, 200px);
  --band-s: clamp(64px, 8vw, 120px);
}

html {
  line-break: strict;
  overflow-x: clip;
}

body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-jp);
  font-size: 16px;
  line-height: 1.75;
  font-weight: 500;
  letter-spacing: 0.02em;
  overflow-x: clip;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
.nb { white-space: nowrap; }
br.br-sp { display: none; }
@media (max-width: 767px) {
  br.br-sp { display: inline; }
  br.br-pc { display: none; }
}

::selection { background: var(--gold); color: var(--ink); }

/* ---------- Layout ---------- */
.container {
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.container--narrow { max-width: 1120px; }
.band { padding-block: var(--band); position: relative; }
.band--s { padding-block: var(--band-s); }
.band--white { background: var(--white); }
.band--dark { background: var(--ink-dark); color: #f2f2f2; }
.band--flush-top { padding-top: 0; }

/* ---------- Typography system ---------- */
.eyebrow {
  font-family: var(--font-en);
  font-style: italic;
  font-weight: 500;
  font-size: 15px;
  letter-spacing: 0.14em;
  color: var(--gold-text);
  display: flex;
  align-items: center;
  gap: 14px;
}
.eyebrow::before {
  content: "";
  width: 40px;
  height: 1px;
  background: var(--gold-line-strong);
}
.eyebrow--center { justify-content: center; }
.eyebrow--center::after {
  content: "";
  width: 40px;
  height: 1px;
  background: var(--gold-line-strong);
}

.kicker {
  font-family: var(--font-en);
  font-weight: 400;
  font-size: clamp(48px, 8vw, 120px);
  line-height: 1;
  letter-spacing: 0.01em;
  color: var(--ink);
}
.kicker--ghost { color: transparent; -webkit-text-stroke: 1px var(--gold-line-strong); }

.sec-head { margin-bottom: clamp(40px, 6vw, 88px); }
.sec-head .eyebrow { margin-bottom: 20px; }
.sec-head h2 {
  font-size: clamp(26px, 3.4vw, 40px);
  font-weight: 600;
  line-height: 1.5;
  letter-spacing: 0.08em;
}
.sec-head .sec-lead {
  margin-top: 18px;
  color: var(--muted);
  font-size: 15px;
  max-width: 640px;
}
.sec-head--center { text-align: center; }
.sec-head--center .sec-lead { margin-inline: auto; }

.en-num {
  font-family: var(--font-en);
  font-weight: 500;
  font-variant-numeric: lining-nums;
}

/* ---------- Header ---------- */
.header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  transition: background 0.4s var(--ease-reveal), box-shadow 0.4s var(--ease-reveal);
}
.header.is-scrolled { background: rgba(242, 242, 242, 0.92); }
.band--dark ~ .header { color: inherit; }
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px var(--gutter);
  max-width: var(--container);
  margin-inline: auto;
}
.header-logo {
  font-family: var(--font-en);
  font-weight: 600;
  font-size: 21px;
  letter-spacing: 0.03em;
  line-height: 1.2;
  display: flex;
  align-items: center;
  gap: 10px;
}
.header-logo .logo-mark { width: 26px; height: 26px; }
.header-logo .logo-mark path,
.header-logo .logo-mark circle { stroke: var(--gold); }
.gnav { display: flex; align-items: center; gap: 34px; }
.gnav a {
  font-size: 14px;
  letter-spacing: 0.1em;
  font-weight: 500;
  position: relative;
  padding-block: 6px;
}
.gnav a::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 100%; height: 1px;
  background: var(--gold);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.45s var(--ease-drama);
}
.gnav a:hover::after { transform: scaleX(1); transform-origin: left; }
.gnav sup {
  font-family: var(--font-en);
  font-style: italic;
  font-size: 12px;
  color: var(--gold-text);
  margin-left: 3px;
  letter-spacing: 0;
}
.gnav .gnav-cta {
  border: 1px solid var(--ink);
  border-radius: 999px;
  padding: 9px 22px;
  transition: background 0.35s var(--ease-reveal), color 0.35s var(--ease-reveal), border-color 0.35s var(--ease-reveal);
}
.gnav .gnav-cta::after { content: none; }
.gnav .gnav-cta:hover { background: var(--ink); color: #fff; }

/* SP menu */
.menu-btn {
  display: none;
  width: 52px; height: 52px;
  border: 1px solid var(--gold-line-strong);
  border-radius: 50%;
  background: rgba(242, 242, 242, 0.9);
  position: relative;
  z-index: 130;
  cursor: pointer;
}
.menu-btn span {
  position: absolute;
  left: 50%; top: 50%;
  width: 20px; height: 1.5px;
  background: var(--ink);
  transition: transform 0.4s var(--ease-drama), opacity 0.3s;
}
.menu-btn span:nth-child(1) { transform: translate(-50%, calc(-50% - 5px)); }
.menu-btn span:nth-child(2) { transform: translate(-50%, -50%); }
.menu-btn span:nth-child(3) { transform: translate(-50%, calc(-50% + 5px)); }
.menu-btn[aria-expanded="true"] span:nth-child(1) { transform: translate(-50%, -50%) rotate(45deg); }
.menu-btn[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.menu-btn[aria-expanded="true"] span:nth-child(3) { transform: translate(-50%, -50%) rotate(-45deg); }

.sp-menu {
  position: fixed;
  inset: 0;
  z-index: 120;
  background: var(--bg);
  display: grid;
  place-content: center;
  text-align: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.5s var(--ease-reveal), visibility 0.5s;
}
.sp-menu.is-open { opacity: 1; visibility: visible; }
/* メニュー展開中の背面スクロール止め（html が実スクローラー） */
html.is-menu-open,
html.is-menu-open body { overflow: hidden; }
.sp-menu a {
  display: block;
  font-size: 24px;
  font-weight: 600;
  letter-spacing: 0.12em;
  padding: 14px 0;
}
.sp-menu sup {
  font-family: var(--font-en);
  font-style: italic;
  font-size: 14px;
  color: var(--gold-text);
  margin-left: 4px;
}
.sp-menu .sp-menu-en {
  font-family: var(--font-en);
  font-style: italic;
  font-size: 14px;
  color: var(--gold-text);
  display: block;
  letter-spacing: 0.16em;
}

@media (max-width: 1023px) {
  .gnav { display: none; }
  .menu-btn { display: block; }
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.12em;
  border: 1px solid var(--ink);
  border-radius: 999px;
  padding: 18px 44px;
  background: transparent;
  color: var(--ink);
  cursor: pointer;
  position: relative;
  isolation: isolate;
  overflow: hidden;
  transition: color 0.4s var(--ease-drama), border-color 0.4s var(--ease-drama);
}
.btn::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--ink);
  transform: scaleY(0);
  transform-origin: bottom;
  transition: transform 0.4s var(--ease-drama);
  z-index: -1;
}
.btn:hover { color: #fff; }
.btn:hover::before { transform: scaleY(1); }
.btn--fill { background: var(--ink); color: #fff; }
.btn--fill::before { background: var(--gold); transform-origin: top; }
.btn--fill:hover { border-color: var(--gold); }
.btn--gold { border-color: var(--gold); color: var(--gold-text); }
.btn--gold::before { background: var(--gold); }
.btn .btn-arrow { font-family: var(--font-en); font-style: italic; }

.textlink {
  font-family: var(--font-en);
  font-style: italic;
  font-weight: 500;
  font-size: 16px;
  letter-spacing: 0.08em;
  color: var(--ink);
  display: inline-flex;
  align-items: center;
  gap: 10px;
  border-bottom: 1px solid var(--gold-line-strong);
  padding-bottom: 4px;
  transition: color 0.3s, border-color 0.3s;
}
.textlink:hover { color: var(--gold-text); border-color: var(--gold); }

/* ---------- 数字付き行リスト（Issues / Strengths / Process） ---------- */
.num-rows { border-top: 1px solid var(--gold-line); }
.num-row {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: clamp(20px, 4vw, 64px);
  padding-block: clamp(28px, 4vw, 52px);
  border-bottom: 1px solid var(--gold-line);
  align-items: start;
}
.num-row .num {
  font-family: var(--font-en);
  font-style: italic;
  font-weight: 400;
  font-size: clamp(36px, 4.6vw, 64px);
  line-height: 1;
  color: var(--gold-lg);
}
.num-row h3 {
  font-size: clamp(19px, 2vw, 24px);
  font-weight: 600;
  letter-spacing: 0.08em;
  line-height: 1.6;
  margin-bottom: 10px;
}
.num-row p { color: #3c3c3c; font-size: 15px; max-width: 800px; }
@media (max-width: 767px) {
  .num-row { grid-template-columns: 64px 1fr; }
}

/* ---------- Stats ---------- */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--gold-line);
  border-bottom: 1px solid var(--gold-line);
}
.stat {
  padding: clamp(32px, 4vw, 56px) 20px;
  text-align: center;
  border-left: 1px solid var(--gold-line);
}
.stat:first-child { border-left: none; }
.stat .stat-value {
  font-family: var(--font-en);
  font-weight: 400;
  font-size: clamp(48px, 6.4vw, 96px);
  font-variant-numeric: tabular-nums;
  line-height: 1.05;
  color: var(--ink);
}
.stat .stat-value .stat-suffix {
  font-size: 0.42em;
  font-style: italic;
  color: var(--gold-lg);
  margin-left: 2px;
}
.stat .stat-label { margin-top: 10px; font-size: 13px; letter-spacing: 0.14em; color: var(--muted); }
@media (max-width: 767px) {
  .stats { grid-template-columns: 1fr 1fr; }
  .stat:nth-child(3) { border-left: none; }
  .stat:nth-child(n+3) { border-top: 1px solid var(--gold-line); }
}

/* ---------- Works feed（1x/2x混成） ---------- */
.feed {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}
.feed-card { position: relative; display: block; }
.feed-card--wide { grid-column: span 2; }
.feed-card .feed-media {
  position: relative;
  aspect-ratio: 393 / 471;
  overflow: hidden;
  background: var(--surface);
}
.feed-card--wide .feed-media { aspect-ratio: 804 / 471; }
.feed-card .feed-media img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 1s var(--ease-reveal);
}
.feed-card:hover .feed-media img { transform: scale(1.045); }
.feed-card .feed-media::after {
  content: "";
  position: absolute;
  inset: 0;
  border: 1px solid rgba(200, 158, 98, 0.18);
  pointer-events: none;
}
.feed-card .feed-body { padding: 16px 2px 0; }
.feed-card .feed-tag {
  font-family: var(--font-en);
  font-style: italic;
  font-size: 12.5px;
  letter-spacing: 0.12em;
  color: var(--gold-text);
}
.feed-card .feed-title {
  font-size: 18px;
  font-weight: 600;
  letter-spacing: 0.06em;
  line-height: 1.5;
  margin-top: 6px;
}
.feed-card .feed-desc { margin-top: 6px; font-size: 13.5px; color: var(--muted); }
@media (max-width: 1023px) {
  .feed { grid-template-columns: 1fr 1fr; }
  .feed-card--wide { grid-column: span 2; }
}
@media (max-width: 767px) {
  .feed { grid-template-columns: 1fr; gap: 40px; }
  .feed-card--wide { grid-column: span 1; }
  .feed-card .feed-media, .feed-card--wide .feed-media { aspect-ratio: 4 / 3; }
}

/* ---------- Service cards ---------- */
.svc-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border-top: 1px solid var(--gold-line);
  border-left: 1px solid var(--gold-line);
}
.svc {
  border-right: 1px solid var(--gold-line);
  border-bottom: 1px solid var(--gold-line);
  padding: clamp(28px, 3vw, 48px);
  position: relative;
  background: transparent;
  transition: background 0.5s var(--ease-reveal);
}
.svc:hover { background: var(--white); }
.svc .svc-num {
  font-family: var(--font-en);
  font-style: italic;
  font-size: 15px;
  color: var(--gold-text);
}
.svc h3 {
  font-size: 19px;
  font-weight: 600;
  letter-spacing: 0.06em;
  margin: 14px 0 12px;
  line-height: 1.55;
}
.svc p { font-size: 14px; color: #3c3c3c; }
.svc .svc-icon { width: 44px; height: 44px; margin-bottom: 18px; }
.svc .svc-icon * { stroke: var(--gold); fill: none; stroke-width: 1.2; }
@media (max-width: 1023px) { .svc-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 767px) { .svc-grid { grid-template-columns: 1fr; } }

/* ---------- Tech stack（dark band 内） ---------- */
.tech-list {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}
.tech-list li {
  font-family: var(--font-en);
  font-size: 15px;
  letter-spacing: 0.06em;
  border: 1px solid rgba(200, 158, 98, 0.45);
  border-radius: 999px;
  padding: 10px 24px;
  color: #e9e9e9;
  transition: background 0.35s, color 0.35s;
}
.tech-list li:hover { background: var(--gold); color: var(--ink-dark); }

/* ---------- Voice ---------- */
.voice-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.voice {
  background: var(--white);
  padding: clamp(28px, 3vw, 44px);
  border-top: 1px solid var(--gold);
  display: flex;
  flex-direction: column;
  gap: 18px;
}
.voice .voice-stars { color: var(--gold-lg); font-size: 14px; letter-spacing: 0.3em; }
.voice blockquote { font-size: 14.5px; line-height: 2; flex: 1; }
.voice .voice-meta { font-size: 12.5px; color: var(--muted); letter-spacing: 0.06em; }
.voice-note { font-size: 12.5px; color: var(--muted); margin-bottom: 24px; }
@media (max-width: 1023px) { .voice-grid { grid-template-columns: 1fr; } }

/* ---------- FAQ ---------- */
.faq { border-top: 1px solid var(--gold-line); }
.faq-item { border-bottom: 1px solid var(--gold-line); }
.faq-item summary {
  list-style: none;
  cursor: pointer;
  display: grid;
  grid-template-columns: 56px 1fr 40px;
  align-items: center;
  gap: 16px;
  padding-block: 26px;
  font-size: 16.5px;
  font-weight: 600;
  letter-spacing: 0.05em;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary .faq-q {
  font-family: var(--font-en);
  font-style: italic;
  font-size: 22px;
  color: var(--gold-text);
  text-align: center;
}
.faq-item summary .faq-toggle {
  position: relative;
  width: 36px; height: 36px;
  border: 1px solid var(--gold-line-strong);
  border-radius: 50%;
}
.faq-item summary .faq-toggle::before,
.faq-item summary .faq-toggle::after {
  content: "";
  position: absolute;
  left: 50%; top: 50%;
  width: 12px; height: 1px;
  background: var(--gold);
  transform: translate(-50%, -50%);
  transition: transform 0.4s var(--ease-drama);
}
.faq-item summary .faq-toggle::after { transform: translate(-50%, -50%) rotate(90deg); }
.faq-item[open] summary .faq-toggle::after { transform: translate(-50%, -50%) rotate(0deg); }
.faq-item .faq-a {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 16px;
  padding: 0 40px 28px 0;
}
.faq-item .faq-a .faq-a-mark {
  font-family: var(--font-en);
  font-style: italic;
  font-size: 22px;
  color: var(--muted);
  text-align: center;
}
.faq-item .faq-a p { font-size: 15px; color: #3c3c3c; }

/* ---------- Pricing ---------- */
.price-rows { border-top: 1px solid var(--gold-line); }
.price-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 20px;
  align-items: end;
  padding-block: clamp(24px, 3vw, 36px);
  border-bottom: 1px solid var(--gold-line);
}
.price-row h3 { font-size: 18px; font-weight: 600; letter-spacing: 0.06em; }
.price-row .price-desc { font-size: 13.5px; color: var(--muted); margin-top: 6px; }
.price-row .price-value {
  font-family: var(--font-en);
  font-size: clamp(26px, 3vw, 38px);
  font-weight: 500;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}
.price-row .price-value small { font-family: var(--font-jp); font-size: 13px; color: var(--muted); }
.price-note { font-size: 13px; color: var(--muted); margin-top: 20px; }
@media (max-width: 600px) {
  .price-row { grid-template-columns: 1fr; align-items: start; gap: 8px; }
}

/* ---------- Note cards ---------- */
.note-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.note-card { display: block; }
.note-card .note-media {
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: var(--surface);
  position: relative;
}
.note-card .note-media img { width: 100%; height: 100%; object-fit: cover; transition: transform 1s var(--ease-reveal); }
.note-card:hover .note-media img { transform: scale(1.045); }
.note-card .note-media::after { content: ""; position: absolute; inset: 0; border: 1px solid rgba(200,158,98,.18); pointer-events: none; }
.note-card .note-date { font-family: var(--font-en); font-style: italic; font-size: 13px; color: var(--gold-text); margin-top: 14px; display: block; }
.note-card h3 { font-size: 16.5px; font-weight: 600; line-height: 1.7; margin-top: 6px; letter-spacing: 0.04em; }
.note-card .note-tag { font-size: 12px; color: var(--muted); margin-top: 6px; display: block; letter-spacing: 0.08em; }
@media (max-width: 1023px) { .note-grid { grid-template-columns: 1fr; } }

/* ---------- Marquee ---------- */
.ticker {
  overflow: hidden;
  border-block: 1px solid var(--gold-line);
  padding-block: 18px;
  position: relative;
}
.ticker-track {
  display: flex;
  gap: 0;
  width: max-content;
  animation: ticker-scroll 30s linear infinite;
}
.ticker-track span {
  font-family: var(--font-en);
  font-style: italic;
  font-weight: 400;
  font-size: clamp(18px, 2vw, 26px);
  letter-spacing: 0.1em;
  color: var(--gold);
  white-space: nowrap;
  padding-right: 3.2em;
}
@keyframes ticker-scroll {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

/* ---------- Page hero（下層共通） ---------- */
.page-hero {
  padding-top: clamp(150px, 18vw, 240px);
  padding-bottom: var(--band-s);
  position: relative;
}
.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 12.5px;
  color: var(--muted);
  letter-spacing: 0.08em;
  margin-bottom: 34px;
}
.breadcrumbs a { color: var(--muted); transition: color 0.3s; }
.breadcrumbs a:hover { color: var(--gold); }
.breadcrumbs .bc-sep { color: var(--gold-line-strong); }
.page-hero h1 {
  font-size: clamp(30px, 4.4vw, 56px);
  font-weight: 600;
  line-height: 1.45;
  letter-spacing: 0.08em;
  margin-top: 18px;
}
.page-hero .page-lead {
  margin-top: 22px;
  color: #3c3c3c;
  font-size: 15.5px;
  max-width: 720px;
}
.page-hero .page-kicker {
  position: absolute;
  right: 0;
  top: clamp(90px, 11vw, 150px);
  font-family: var(--font-en);
  font-weight: 400;
  font-size: clamp(60px, 11vw, 170px);
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1px var(--gold-line);
  pointer-events: none;
  user-select: none;
  white-space: nowrap;
  overflow: hidden;
  max-width: 100%;
}

/* ---------- Meta card（works 下層 dl） ---------- */
.meta-card {
  background: var(--white);
  border-top: 1px solid var(--gold);
  padding: clamp(28px, 3vw, 40px);
}
.meta-card dl { display: grid; gap: 0; }
.meta-card .meta-row {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 14px;
  padding-block: 12px;
  border-bottom: 1px solid var(--gold-line);
  font-size: 13.5px;
}
.meta-card .meta-row:last-child { border-bottom: none; }
.meta-card dt { color: var(--muted); letter-spacing: 0.08em; }
.meta-card dd { color: var(--ink); }
.tag-list { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px; }
.tag-list li {
  font-family: var(--font-en);
  font-size: 12.5px;
  letter-spacing: 0.05em;
  border: 1px solid var(--gold-line-strong);
  border-radius: 999px;
  padding: 5px 14px;
  color: var(--gold-text);
}

/* ---------- Prose（privacy / note article 本文） ---------- */
.prose h2 {
  font-size: 21px;
  font-weight: 600;
  letter-spacing: 0.06em;
  margin: 56px 0 18px;
  padding-left: 18px;
  border-left: 2px solid var(--gold);
  line-height: 1.6;
}
.prose p { margin-bottom: 18px; font-size: 15px; color: #2c2c2c; }
.prose ul { margin: 0 0 18px; padding-left: 0; }
.prose ul li {
  font-size: 15px;
  color: #2c2c2c;
  padding: 8px 0 8px 26px;
  position: relative;
  border-bottom: 1px solid var(--gold-line);
}
.prose ul li::before {
  content: "";
  position: absolute;
  left: 4px; top: 1.15em;
  width: 10px; height: 1px;
  background: var(--gold);
}

/* ---------- CTA band ---------- */
.cta-band {
  background: var(--ink-dark);
  color: #f2f2f2;
  text-align: center;
  padding-block: var(--band);
  position: relative;
  overflow: hidden;
}
.cta-band .eyebrow { justify-content: center; margin-bottom: 22px; }
.cta-band .eyebrow::after { content: ""; width: 40px; height: 1px; background: var(--gold-line-strong); }
.cta-band h2 { font-size: clamp(26px, 3.6vw, 44px); font-weight: 600; letter-spacing: 0.1em; line-height: 1.6; }
.cta-band p { margin: 24px auto 40px; max-width: 620px; font-size: 15px; color: #c9c9c9; }
.cta-band .btn { border-color: #f2f2f2; color: #f2f2f2; }
.cta-band .btn::before { background: var(--gold); }
.cta-band .btn--fill { background: var(--gold); border-color: var(--gold); color: var(--ink-dark); }
.cta-band .btn--fill::before { background: #f2f2f2; }
.cta-band .btn--fill:hover { color: var(--ink-dark); }
.cta-band .cta-btns { display: flex; gap: 18px; justify-content: center; flex-wrap: wrap; }
.cta-band .cta-ring {
  position: absolute;
  inset: 50% auto auto 50%;
  width: min(150vw, 1200px);
  aspect-ratio: 1;
  transform: translate(-50%, -50%);
  opacity: 0.14;
  pointer-events: none;
}

/* ---------- Footer ---------- */
.footer { background: var(--ink-dark); color: #9a9a9a; padding: 60px 0 40px; border-top: 1px solid rgba(200,158,98,.22); }
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}
.footer-logo { font-family: var(--font-en); font-weight: 600; font-size: 19px; color: #f2f2f2; letter-spacing: 0.03em; }
.footer-nav { display: flex; gap: 26px; flex-wrap: wrap; }
.footer-nav a { font-size: 13px; letter-spacing: 0.08em; transition: color 0.3s; }
.footer-nav a:hover { color: var(--gold); }
.footer-copy { font-family: var(--font-en); font-size: 12.5px; letter-spacing: 0.08em; }

/* ---------- Back to top ---------- */
.backtop {
  position: fixed;
  right: 24px; bottom: 24px;
  z-index: 90;
  width: 56px; height: 56px;
  border: 1px solid var(--gold-line-strong);
  border-radius: 50%;
  background: rgba(242, 242, 242, 0.92);
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.4s, visibility 0.4s;
  display: grid;
  place-content: center;
}
.backtop.is-visible { opacity: 1; visibility: visible; }
.backtop::before {
  content: "";
  width: 9px; height: 9px;
  border-top: 1.5px solid var(--ink);
  border-left: 1.5px solid var(--ink);
  transform: rotate(45deg) translate(2px, 2px);
}

/* ---------- Forms（contact） ---------- */
.form-field { margin-bottom: 28px; }
.form-field label {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.08em;
  margin-bottom: 10px;
}
.req {
  font-size: 12px;
  color: var(--ink);
  background: var(--gold);
  padding: 2px 9px;
  letter-spacing: 0.1em;
}
.form-field input[type="text"],
.form-field input[type="email"],
.form-field input[type="tel"],
.form-field select,
.form-field textarea {
  width: 100%;
  background: var(--white);
  border: 1px solid var(--line);
  padding: 14px 16px;
  font-family: var(--font-jp);
  font-size: 15px;
  color: var(--ink);
  transition: border-color 0.3s;
}
.form-field input:focus-visible,
.form-field select:focus-visible,
.form-field textarea:focus-visible {
  border-color: var(--gold-text);
}
.form-field textarea { min-height: 180px; resize: vertical; }
.form-field input[type="text"],
.form-field input[type="email"],
.form-field input[type="tel"],
.form-field select,
.form-field textarea { border-color: var(--line-form); }
.form-check { display: flex; align-items: center; gap: 10px; font-size: 14px; }
.form-check a { color: var(--gold); text-decoration: underline; }
.form-note { font-size: 12.5px; color: var(--muted); margin-top: 16px; }

/* ---------- Focus / a11y ---------- */
:focus-visible { outline: 2px solid var(--gold-text); outline-offset: 3px; }
/* 暗い面ではもとの金の方がコントラストが高い（6.7:1） */
.band--dark :focus-visible,
.cta-band :focus-visible,
.footer :focus-visible,
.sp-menu :focus-visible { outline-color: var(--gold); }
.band--dark .eyebrow,
.cta-band .eyebrow { color: var(--gold); }
.band--dark .tech-list li:hover { color: var(--ink-dark); }
.skip-link {
  position: fixed;
  left: 8px; top: 8px;
  z-index: 200;
  background: var(--ink);
  color: #fff;
  padding: 10px 18px;
  font-size: 13px;
  transform: translateY(-300%);
  transition: transform 0.3s;
}
.skip-link:focus { transform: translateY(0); }

/* ---------- Utility ---------- */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(32px, 5vw, 80px); align-items: start; }
@media (max-width: 1023px) { .grid-2 { grid-template-columns: 1fr; } }
.sticky-col { position: sticky; top: 120px; }
@media (max-width: 1023px) { .sticky-col { position: static; } }