/* ============================================================
   電子部品商社 TOPページ
   統合案「深宇宙プレミアム × 緑の大気光」
   トークンはGATE3確定値（brief.md）— 変更不可
   ============================================================ */
:root {
  --space-navy: #0A1626;
  --space-navy-2: #12203A;
  --brand-blue: #004098;
  --mint: #7FD8BE;
  --earth-green: #2F7A62;
  --sky: #9CC6E8;
  --paper: #F6F8FB;
  --plate: #EEF1F5;
  --ink: #1A2433;
  --ink-soft: #4A5568;
  --hairline: #C3D0DE;
  --amber: #B27B2C;

  --font-serif: "Noto Serif JP", serif;
  --font-sans: "Noto Sans JP", sans-serif;
  --font-mono: "IBM Plex Mono", monospace;
  --font-label: "Jost", sans-serif;

  --w-content: 1200px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  font-weight: 400;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.9;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

.container { max-width: var(--w-content); margin: 0 auto; padding: 0 24px; }

/* ---------- 英字ラベル＋明朝見出しのセクション型 ---------- */
.sec-head { margin-bottom: 40px; }
.sec-label {
  font-family: var(--font-label);
  font-weight: 300;
  font-size: 12px;
  letter-spacing: 0.28em;
  color: var(--earth-green);
  display: flex;
  align-items: center;
  gap: 12px;
  text-transform: uppercase;
}
.sec-label::before { content: ""; width: 32px; height: 1px; background: var(--mint); }
.sec-head h2 {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 32px;
  letter-spacing: 0.06em;
  margin-top: 10px;
  color: var(--ink);
}
.sec-head--row { display: flex; align-items: flex-end; justify-content: space-between; gap: 24px; }
.sec-more {
  font-size: 13px;
  color: var(--brand-blue);
  letter-spacing: 0.08em;
  white-space: nowrap;
  padding-bottom: 6px;
  border-bottom: 1px solid transparent;
  transition: border-color .25s;
}
.sec-more:hover { border-color: var(--brand-blue); }

section { padding: 72px 0; }

/* ============================================================
   ヘッダー（透過→スクロールで紺・2段構成はモック準拠）
   ============================================================ */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: linear-gradient(180deg, rgba(10,22,38,.72), rgba(10,22,38,.28) 78%, rgba(10,22,38,0));
  transition: background .3s;
}
.site-header.is-scrolled { background: rgba(10,22,38,.96); box-shadow: 0 1px 0 rgba(127,216,190,.25); }

.header-top {
  display: flex;
  align-items: center;
  gap: 28px;
  max-width: var(--w-content);
  margin: 0 auto;
  padding: 14px 24px 10px;
}
.header-logo img { height: 22px; width: auto; }
.header-search {
  flex: 1;
  max-width: 430px;
  display: flex;
  align-items: center;
  gap: 10px;
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(195,208,222,.35);
  border-radius: 4px;
  padding: 7px 14px;
}
.header-search svg { flex-shrink: 0; opacity: .75; }
.header-search input {
  width: 100%;
  background: transparent;
  border: 0;
  outline: 0;
  color: #fff;
  font-family: var(--font-sans);
  font-size: 13px;
}
.header-search input::placeholder { color: rgba(255,255,255,.55); }
.header-utils { margin-left: auto; display: flex; align-items: center; gap: 22px; }
.header-stock-link {
  color: rgba(255,255,255,.85);
  font-size: 13px;
  letter-spacing: 0.05em;
  border-bottom: 1px solid transparent;
  transition: border-color .25s;
}
.header-stock-link:hover { border-color: var(--mint); }
.btn-contact {
  background: var(--brand-blue);
  color: #fff;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.08em;
  padding: 10px 26px;
  border-radius: 4px;
  transition: background .25s, transform .2s;
}
.btn-contact:hover { background: #00337a; transform: translateY(-1px); }

.header-nav { border-top: 1px solid rgba(195,208,222,.18); }
.header-nav ul {
  display: flex;
  gap: 8px;
  max-width: var(--w-content);
  margin: 0 auto;
  padding: 0 24px;
}
.header-nav a {
  display: block;
  padding: 11px 18px;
  color: rgba(255,255,255,.88);
  font-size: 13.5px;
  letter-spacing: 0.06em;
  position: relative;
}
.header-nav a::after {
  content: "";
  position: absolute;
  left: 18px; right: 18px; bottom: 6px;
  height: 1px;
  background: var(--mint);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .3s;
}
.header-nav a:hover::after { transform: scaleX(1); }

/* SPハンバーガー */
.nav-toggle { display: none; }

/* ============================================================
   ヒーロー（1a 全面ブリード・緑の大気光）
   ============================================================ */
.hero {
  position: relative;
  height: 860px;
  background: var(--space-navy);
  overflow: hidden;
  display: flex;
  align-items: flex-end;
}
.hero__bg {
  position: absolute;
  inset: 0;
  background: url(assets/img/hero_airglow.jpg) center bottom / cover no-repeat;
}
/* 紺オーバーレイ: 上は深く・大気光の弧(上段1/3)は活かす・最下部は紙面へ「大気圏を抜ける」 */
.hero__bg::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg,
    rgba(10,22,38,.66) 0%,
    rgba(10,22,38,.22) 30%,
    rgba(10,22,38,.06) 44%,
    rgba(10,22,38,.18) 66%,
    rgba(10,22,38,.30) 82%,
    rgba(246,248,251,.94) 97%,
    #F6F8FB 100%);
}
/* 経緯線グリッド（精密機器の図面感・5%） */
.hero__grid {
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(0deg, rgba(156,198,232,.05) 0 1px, transparent 1px 120px),
    repeating-linear-gradient(90deg, rgba(156,198,232,.05) 0 1px, transparent 1px 120px);
}
.hero__inner {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: var(--w-content);
  margin: 0 auto;
  padding: 0 24px 150px;
}
.hero-label {
  font-family: var(--font-label);
  font-weight: 300;
  font-size: 13px;
  letter-spacing: 0.32em;
  color: var(--mint);
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 26px;
}
.hero-label::before { content: ""; width: 44px; height: 1px; background: var(--mint); }
.hero h1 {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 56px;
  line-height: 1.55;
  letter-spacing: 0.08em;
  color: #fff;
  text-shadow: 0 2px 24px rgba(10,22,38,.45);
  margin-bottom: 22px;
}
.br-sp br { display: none; }
.hero-sub {
  color: rgba(255,255,255,.88);
  font-size: 16px;
  letter-spacing: 0.05em;
  margin-bottom: 40px;
  text-shadow: 0 1px 12px rgba(10,22,38,.5);
}
.hero-chips { display: flex; gap: 14px; flex-wrap: wrap; }
.chip {
  display: flex;
  align-items: baseline;
  gap: 10px;
  border: 1px solid rgba(195,208,222,.45);
  background: rgba(10,22,38,.35);
  backdrop-filter: blur(3px);
  border-radius: 3px;
  padding: 10px 20px;
}
.chip b {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 15px;
  color: #fff;
  letter-spacing: 0.04em;
}
.chip span { font-size: 11.5px; color: var(--sky); letter-spacing: 0.1em; }
.hero-scroll {
  position: absolute;
  right: 34px;
  bottom: 120px;
  z-index: 2;
  font-family: var(--font-label);
  font-size: 10px;
  letter-spacing: 0.3em;
  color: rgba(255,255,255,.6);
  writing-mode: vertical-rl;
  display: flex;
  align-items: center;
  gap: 10px;
}
.hero-scroll::after {
  content: "";
  width: 1px;
  height: 56px;
  background: linear-gradient(180deg, var(--mint), transparent);
  animation: scrollLine 2.2s ease-in-out infinite;
}
@keyframes scrollLine { 0% { transform: scaleY(0); transform-origin: top; } 55% { transform: scaleY(1); transform-origin: top; } 100% { transform: scaleY(1); opacity: 0; } }

/* ============================================================
   注目マーケット（1e 白カード＋デュオトーン写真上置き）
   ============================================================ */
.markets { padding-top: 8px; }
.market-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.market-card {
  background: #fff;
  border: 1px solid rgba(195,208,222,.55);
  border-radius: 6px;
  overflow: hidden;
  transition: transform .3s, box-shadow .3s;
  display: flex;
  flex-direction: column;
}
.market-card:hover { transform: translateY(-4px); box-shadow: 0 14px 34px rgba(10,22,38,.12); }
.market-card__photo { position: relative; aspect-ratio: 16 / 10; overflow: hidden; }
.market-card__photo img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s; }
.market-card:hover .market-card__photo img { transform: scale(1.04); }
.market-card__tag {
  position: absolute;
  top: 14px; left: 14px;
  font-family: var(--font-label);
  font-weight: 400;
  font-size: 10.5px;
  letter-spacing: 0.22em;
  color: var(--mint);
  border: 1px solid rgba(127,216,190,.7);
  background: rgba(10,22,38,.55);
  padding: 4px 12px;
  border-radius: 2px;
}
.market-card__body { padding: 24px 26px 26px; border-top: 2px solid var(--mint); flex: 1; display: flex; flex-direction: column; }
.market-card__body h3 {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 19px;
  letter-spacing: 0.05em;
  margin-bottom: 10px;
}
.market-card__body p { font-size: 13.5px; color: var(--ink-soft); line-height: 1.85; flex: 1; }
.market-card__foot {
  margin-top: 18px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.market-card__date { font-family: var(--font-mono); font-size: 11.5px; color: var(--ink-soft); letter-spacing: 0.05em; }
.market-card__more { font-size: 12.5px; color: var(--brand-blue); letter-spacing: 0.06em; }

/* ============================================================
   取扱メーカー（10ロゴ）
   ============================================================ */
.makers { background: #fff; border-top: 1px solid rgba(195,208,222,.4); border-bottom: 1px solid rgba(195,208,222,.4); }
.maker-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 14px; }
.maker-card {
  border: 1px solid rgba(195,208,222,.5);
  border-radius: 4px;
  background: var(--paper);
  height: 84px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 4px;
  transition: border-color .25s, background .25s;
}
.maker-card:hover { border-color: var(--brand-blue); background: #fff; }
.maker-card b {
  font-family: var(--font-label);
  font-weight: 400;
  font-size: 15px;
  letter-spacing: 0.12em;
  color: var(--space-navy-2);
}
.maker-card span { font-size: 10.5px; color: var(--ink-soft); letter-spacing: 0.06em; }

/* ============================================================
   商品カテゴリー（1g multiply合成 ＋ 1hの型番・在庫バッジ）
   ============================================================ */
.cat-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.cat-card {
  background: #fff;
  border: 1px solid rgba(195,208,222,.55);
  border-radius: 6px;
  padding: 22px;
  display: flex;
  gap: 20px;
  align-items: center;
  transition: transform .3s, box-shadow .3s, border-color .3s;
}
.cat-card:hover { transform: translateY(-3px); box-shadow: 0 10px 26px rgba(10,22,38,.1); border-color: var(--sky); }
.cat-card__plate {
  width: 128px;
  height: 128px;
  flex-shrink: 0;
  background: var(--plate);
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.cat-card__plate img { mix-blend-mode: multiply; max-width: 86%; max-height: 86%; object-fit: contain; }
.cat-card__plate img.is-small { max-width: 56%; max-height: 56%; } /* 低解像度サムネは等倍以下で品質差を吸収 */
.cat-card__body h3 { font-family: var(--font-serif); font-weight: 600; font-size: 17.5px; letter-spacing: 0.05em; }
.cat-card__en {
  font-family: var(--font-label);
  font-weight: 300;
  font-size: 10px;
  letter-spacing: 0.24em;
  color: var(--earth-green);
  text-transform: uppercase;
  display: block;
  margin-bottom: 2px;
}
.cat-card__code {
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--ink-soft);
  letter-spacing: 0.02em;
  display: block;
  margin-top: 8px;
}
.stock-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--earth-green);
  border: 1px solid rgba(47,122,98,.4);
  border-radius: 20px;
  padding: 2px 12px;
  margin-top: 10px;
}
.stock-badge::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--earth-green); }
.stock-badge.is-low { color: var(--amber); border-color: rgba(178,123,44,.4); }
.stock-badge.is-low::before { background: var(--amber); }

/* ============================================================
   トピック
   ============================================================ */
.topics { background: #fff; border-top: 1px solid rgba(195,208,222,.4); }
.topic-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.topic-card { border: 1px solid rgba(195,208,222,.55); border-radius: 6px; overflow: hidden; background: #fff; transition: transform .3s, box-shadow .3s; }
.topic-card:hover { transform: translateY(-3px); box-shadow: 0 10px 26px rgba(10,22,38,.1); }
.topic-card__photo { aspect-ratio: 16 / 9; overflow: hidden; background: var(--plate); display: flex; align-items: center; justify-content: center; }
.topic-card__photo img { mix-blend-mode: multiply; max-width: 74%; max-height: 82%; object-fit: contain; }
.topic-card__body { padding: 20px 22px 24px; }
.topic-tag {
  display: inline-block;
  font-size: 10.5px;
  letter-spacing: 0.14em;
  color: var(--brand-blue);
  border: 1px solid rgba(0,64,152,.35);
  border-radius: 2px;
  padding: 2px 10px;
  margin-bottom: 12px;
}
.topic-card__body h3 { font-size: 15px; font-weight: 500; line-height: 1.7; letter-spacing: 0.03em; }
.topic-card__maker { font-family: var(--font-label); font-size: 11px; letter-spacing: 0.18em; color: var(--ink-soft); display: block; margin-top: 10px; }

/* ============================================================
   在庫リスト
   ============================================================ */
.stock-note { display: flex; gap: 22px; align-items: center; margin-bottom: 18px; font-size: 12.5px; color: var(--ink-soft); }
.stock-note .dot { display: inline-flex; align-items: center; gap: 7px; }
.stock-note .dot::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--earth-green); }
.stock-table-wrap { background: #fff; border: 1px solid rgba(195,208,222,.55); border-radius: 6px; overflow: hidden; }
.stock-table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
.stock-table th {
  background: var(--space-navy-2);
  color: rgba(255,255,255,.92);
  font-weight: 500;
  font-size: 12px;
  letter-spacing: 0.12em;
  text-align: left;
  padding: 12px 22px;
}
.stock-table td { padding: 15px 22px; border-top: 1px solid rgba(195,208,222,.4); }
.stock-table td.mono { font-family: var(--font-mono); font-feature-settings: "tnum"; letter-spacing: 0.02em; }
.stock-table tr:hover td { background: var(--paper); }

/* ============================================================
   お知らせ
   ============================================================ */
.news-list { border-top: 1px solid rgba(195,208,222,.55); }
.news-list li { border-bottom: 1px solid rgba(195,208,222,.55); }
.news-list a {
  display: flex;
  align-items: center;
  gap: 22px;
  padding: 17px 10px;
  transition: background .25s;
}
.news-list a:hover { background: #fff; }
.news-date { font-family: var(--font-mono); font-feature-settings: "tnum"; font-size: 12.5px; color: var(--ink-soft); flex-shrink: 0; }
.news-badge {
  flex-shrink: 0;
  font-size: 10.5px;
  letter-spacing: 0.1em;
  border-radius: 2px;
  padding: 2px 10px;
  border: 1px solid;
}
.news-badge.is-imp { color: #A8332E; border-color: rgba(168,51,46,.45); }
.news-badge.is-new { color: var(--earth-green); border-color: rgba(47,122,98,.45); }
.news-badge.is-info { color: var(--ink-soft); border-color: rgba(195,208,222,.9); }
.news-title { font-size: 14px; letter-spacing: 0.02em; }

/* ============================================================
   フッター（深宇宙・地平線ヘアライン・星）
   ============================================================ */
.site-footer {
  position: relative;
  background: var(--space-navy);
  color: rgba(255,255,255,.82);
  margin-top: 40px;
  overflow: hidden;
}
.site-footer::before { /* 地平線ヘアライン */
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--mint) 30%, var(--sky) 60%, transparent);
  opacity: .8;
}
.site-footer::after { /* 微細な星 */
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(1px 1px at 12% 30%, rgba(255,255,255,.4) 50%, transparent 51%),
    radial-gradient(1px 1px at 32% 68%, rgba(255,255,255,.28) 50%, transparent 51%),
    radial-gradient(1.5px 1.5px at 56% 22%, rgba(156,198,232,.4) 50%, transparent 51%),
    radial-gradient(1px 1px at 72% 55%, rgba(255,255,255,.3) 50%, transparent 51%),
    radial-gradient(1px 1px at 88% 34%, rgba(127,216,190,.35) 50%, transparent 51%);
  pointer-events: none;
}
.footer-inner {
  position: relative;
  z-index: 1;
  max-width: var(--w-content);
  margin: 0 auto;
  padding: 64px 24px 30px;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
}
.footer-brand img { height: 20px; width: auto; margin-bottom: 18px; }
.footer-brand p { font-size: 13px; line-height: 2; color: rgba(255,255,255,.66); }
.footer-brand .tagline { font-family: var(--font-serif); font-size: 14.5px; color: rgba(255,255,255,.9); letter-spacing: 0.08em; margin-bottom: 10px; }
.footer-col h4 {
  font-family: var(--font-label);
  font-weight: 400;
  font-size: 11px;
  letter-spacing: 0.26em;
  color: var(--mint);
  margin-bottom: 16px;
  text-transform: uppercase;
}
.footer-col li { margin-bottom: 9px; }
.footer-col a { font-size: 13px; color: rgba(255,255,255,.78); transition: color .25s; }
.footer-col a:hover { color: var(--mint); }
.footer-bottom {
  position: relative;
  z-index: 1;
  border-top: 1px solid rgba(195,208,222,.18);
  text-align: center;
  padding: 20px 24px;
  font-family: var(--font-label);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: rgba(255,255,255,.5);
}

/* ============================================================
   下層ページ共通部分（common.html / common_company.html）
   ============================================================ */
body.subpage { padding-top: 101px; background: #fff; }
body.subpage .site-header { background: rgba(10,22,38,.97); box-shadow: 0 1px 0 rgba(127,216,190,.25); }

/* パンくず（下層ヒーロー内に白文字で重ねる） */
.breadcrumb { position: absolute; top: 0; left: 0; right: 0; z-index: 3; }
.breadcrumb ol { display: flex; flex-wrap: wrap; gap: 10px; max-width: var(--w-content); margin: 0 auto; padding: 18px 24px; font-size: 12px; letter-spacing: .03em; }
.breadcrumb li { display: flex; gap: 10px; align-items: center; color: rgba(255,255,255,.62); }
.breadcrumb li:not(:last-child)::after { content: "/"; color: rgba(255,255,255,.3); font-size: 11px; }
.breadcrumb a { transition: color .25s; }
.breadcrumb a:hover { color: var(--mint); }
.breadcrumb li:last-child { color: rgba(255,255,255,.95); }

/* ページヒーロー型B: 写真バナー（注目マーケット・製品ページ用） */
.page-hero--photo { position: relative; min-height: 360px; display: flex; align-items: center; background: var(--space-navy); overflow: hidden; }
.page-hero--photo .ph-bg { position: absolute; inset: 0; background-size: cover; background-position: center; }
.page-hero--photo .ph-bg::after { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(10,22,38,.92) 0%, rgba(10,22,38,.62) 52%, rgba(10,22,38,.32) 100%); }
.page-hero__inner { position: relative; z-index: 1; max-width: var(--w-content); margin: 0 auto; padding: 0 24px; width: 100%; }
.page-hero__tag { font-family: var(--font-label); font-size: 11px; letter-spacing: .22em; color: var(--mint); border: 1px solid rgba(127,216,190,.7); padding: 4px 14px; border-radius: 2px; display: inline-block; margin-bottom: 18px; }
.page-hero--photo h1 { font-family: var(--font-serif); font-weight: 600; font-size: 36px; letter-spacing: .06em; color: #fff; margin-bottom: 14px; }
.page-hero__lead { color: rgba(255,255,255,.86); font-size: 14.5px; max-width: 640px; line-height: 1.9; }

/* ページヒーロー型A: 紺帯・センター（会社情報・採用など文字ページ用） */
.page-hero--band { background: linear-gradient(180deg, var(--space-navy), var(--space-navy-2)); text-align: center; padding: 84px 24px 62px; position: relative; overflow: hidden; }
.page-hero--band::after { content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 1px; background: linear-gradient(90deg, transparent, var(--mint) 40%, var(--sky) 60%, transparent); }
.page-hero--band .ph-label { font-family: var(--font-label); font-weight: 300; font-size: 12px; letter-spacing: .3em; color: var(--mint); display: block; margin-bottom: 14px; }
.page-hero--band h1 { font-family: var(--font-serif); font-weight: 600; font-size: 34px; letter-spacing: .08em; color: #fff; }

/* 下層本文 */
.subpage-body { max-width: 860px; margin: 0 auto; padding: 64px 24px 40px; }
.subpage-body .lead { font-size: 16px; line-height: 2; color: var(--ink); margin-bottom: 44px; }
.art-sec { margin-bottom: 48px; }
.art-sec h2 { font-family: var(--font-serif); font-weight: 600; font-size: 22px; letter-spacing: .05em; padding-left: 16px; border-left: 3px solid var(--brand-blue); margin-bottom: 18px; }
.art-sec h2 .num { font-family: var(--font-label); color: var(--earth-green); margin-right: 10px; }
.art-sec p { color: var(--ink-soft); line-height: 1.95; margin-bottom: 14px; }

/* 本文内テーブル */
.data-table { width: 100%; border-collapse: collapse; font-size: 14px; border: 1px solid rgba(195,208,222,.6); }
.data-table th { background: var(--paper); text-align: left; padding: 13px 18px; width: 32%; font-weight: 500; border-bottom: 1px solid rgba(195,208,222,.5); vertical-align: top; }
.data-table td { padding: 13px 18px; border-bottom: 1px solid rgba(195,208,222,.5); color: var(--ink-soft); }
.data-table tr:last-child th, .data-table tr:last-child td { border-bottom: 0; }

/* FAQ アコーディオン */
.faq details { border: 1px solid rgba(195,208,222,.6); border-radius: 4px; margin-bottom: 12px; overflow: hidden; }
.faq summary { padding: 16px 48px 16px 20px; cursor: pointer; font-weight: 500; font-size: 14.5px; list-style: none; position: relative; background: #fff; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; position: absolute; right: 20px; top: 15px; color: var(--brand-blue); font-family: var(--font-mono); font-size: 16px; }
.faq details[open] summary::after { content: "−"; }
.faq details[open] summary { border-bottom: 1px solid rgba(195,208,222,.5); }
.faq .faq-a { padding: 16px 20px; font-size: 14px; color: var(--ink-soft); line-height: 1.9; }

/* 下層CTA */
.sub-cta { background: var(--paper); border-top: 1px solid rgba(195,208,222,.5); text-align: center; padding: 56px 24px; }
.sub-cta h3 { font-family: var(--font-serif); font-size: 22px; margin-bottom: 10px; letter-spacing: .05em; }
.sub-cta p { color: var(--ink-soft); font-size: 14px; margin-bottom: 24px; }

/* ============================================================
   レスポンシブ（SP=1c: チップ縦積み）
   ============================================================ */
@media (max-width: 1024px) {
  .maker-grid { grid-template-columns: repeat(4, 1fr); }
  .market-grid, .cat-grid, .topic-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-inner { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 767px) {
  body { font-size: 14px; }
  section { padding: 52px 0; }
  .sec-head h2 { font-size: 24px; }

  /* ヘッダー: 検索は2段目へ・ナビはドロワー */
  .header-top { flex-wrap: wrap; gap: 8px; padding: 12px 14px; }
  .header-logo { min-width: 0; flex: 1; }
  .header-logo img { height: 13px; }
  .header-utils { gap: 6px; margin-left: 0; flex-shrink: 0; }
  .header-stock-link { display: none; }
  .btn-contact { padding: 8px 13px; font-size: 11.5px; letter-spacing: 0.04em; }
  .header-search { order: 3; flex-basis: 100%; max-width: none; }
  .header-nav { display: none; }
  .header-nav.is-open {
    display: block;
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(10,22,38,.98);
    padding-top: 110px;
    z-index: 90;
  }
  .header-nav.is-open ul { flex-direction: column; gap: 0; }
  .header-nav.is-open a { font-size: 16px; padding: 16px 24px; border-bottom: 1px solid rgba(195,208,222,.15); }
  .nav-toggle {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 40px; height: 40px;
    background: transparent;
    border: 0;
    cursor: pointer;
    z-index: 101;
    padding: 8px;
  }
  .nav-toggle span { display: block; height: 1.5px; background: #fff; transition: transform .3s, opacity .3s; }
  .nav-toggle.is-open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
  .nav-toggle.is-open span:nth-child(2) { opacity: 0; }
  .nav-toggle.is-open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

  /* ヒーロー: SP縦構図・チップ縦積み(1c) */
  .hero { height: 720px; }
  .hero__bg { background-image: url(assets/img/hero_airglow_sp.jpg); background-position: center 40%; }
  .hero__inner { padding-bottom: 90px; }
  .hero h1 { font-size: 30px; line-height: 1.62; }
  .br-sp br { display: inline; }
  .hero-sub { font-size: 13.5px; }
  .hero-chips { flex-direction: column; gap: 10px; max-width: 300px; }
  .chip { justify-content: space-between; }
  .hero-scroll { display: none; }

  .market-grid, .cat-grid, .topic-grid { grid-template-columns: 1fr; }
  .maker-grid { grid-template-columns: repeat(2, 1fr); }
  .sec-head--row { flex-direction: column; align-items: flex-start; gap: 8px; }

  .stock-table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }
  .stock-table { min-width: 560px; }
  .stock-table th, .stock-table td { padding: 10px 12px; font-size: 12px; white-space: nowrap; }
  .news-list a { flex-wrap: wrap; gap: 10px; }
  .news-title { flex-basis: 100%; }

  .footer-inner { grid-template-columns: 1fr; gap: 30px; padding: 48px 20px 26px; }

  /* 下層ページ SP */
  body.subpage { padding-top: 92px; }
  .page-hero--photo { min-height: 260px; }
  .page-hero--photo h1 { font-size: 25px; }
  .page-hero__lead { font-size: 13.5px; }
  .page-hero--band { padding: 44px 20px; }
  .page-hero--band h1 { font-size: 24px; }
  .subpage-body { padding: 44px 20px 32px; }
  .subpage-body .lead { font-size: 15px; }
  .art-sec h2 { font-size: 19px; }
  .data-table th { width: auto; }
}