/* =========================================================
   ASTRUST — 信頼 × 洗練（vivid-blue variant）
   Brand palette: vivid blue #127EC0 / warm orange #D87812
   ========================================================= */

:root {
  --navy-900: #127EC0;   /* PRIMARY vivid blue — headings & structure */
  --navy-700: #0F6BA8;   /* readable mid-blue — small text only */
  --navy:     #127EC0;   /* PRIMARY vivid blue */
  --navy-500: #127EC0;   /* PRIMARY vivid blue */
  --deep:     #0F6BA8;   /* readable mid-blue (never navy) */
  --deep-900: #0F6BA8;   /* readable mid-blue */
  --blue-soft: #7EBADE;  /* light blue tint */
  --blue-line: #cfe1f2;  /* light-blue hairline (stronger) */
  --orange:   #D87812;
  --orange-600: #B9640C;
  --ink:      #1c2836;
  --muted:    #5c6b7d;
  --line:     #d3e3f3;
  --bg:       #ffffff;
  --bg-soft:  #eef4fb;
  --cream:    #e8f4fd;
  --white:    #ffffff;

  --maxw: 1160px;
  --gutter: clamp(1.25rem, 5vw, 3rem);
  --section-y: clamp(4.5rem, 10vw, 8.5rem);
  --radius: 16px;
  --ease: cubic-bezier(.22, .61, .36, 1);

  /* 英字用スタックにも M PLUS を後詰め：日本語が混ざったとき端末任せの書体にならない */
  --font-en: "Raleway", "M PLUS 1", sans-serif;
  --font-jp: "M PLUS 1", sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: var(--font-jp);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.85;
  font-size: 16px;
  letter-spacing: .01em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img, svg { max-width: 100%; display: block; }
ul { list-style: none; margin: 0; padding: 0; }
a { color: inherit; text-decoration: none; }

/* キーボード操作時の選択枠：詳細画面の閉じるボタンと同じ意匠をサイト全体で統一 */
:focus-visible { outline: 3px solid var(--orange); outline-offset: 2px; }

/* 日本語の見出し・リード文は文節で自然に折り返し、行の長さを揃える
   （word-break/text-wrap とも対応ブラウザだけに効く段階的強化・非対応でも無害） */
.section__title, .section__desc, .hero__catch, .message__lead,
.strength-card__title, .card__title, .ai-card__title, .ai-hedy__title { word-break: auto-phrase; }
.section__title, .section__desc, .hero__catch, .message__lead { text-wrap: balance; }

/* Lift all page content above the fixed #bgFx network layer (art.css, z-index:0).
   The header (z-index:100) and drawer (z-index:90) already sit above it. */
main, .site-footer { position: relative; z-index: 1; }

.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* ---------- Header ---------- */
.site-header {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  height: 84px;
  display: flex; align-items: center;
  background: rgba(255,255,255,0);
  transition: background .4s var(--ease), height .4s var(--ease), box-shadow .4s var(--ease);
}
.site-header.is-scrolled {
  height: 66px;
  background: rgba(255,255,255,.92);
  backdrop-filter: saturate(160%) blur(10px);
  box-shadow: 0 1px 0 rgba(15,77,122,.06);
}
.header__inner {
  display: flex; align-items: center; justify-content: space-between;
  width: 100%; max-width: var(--maxw); margin-inline: auto;
}
.brand { display: inline-flex; align-items: center; gap: .6rem; }
.brand__logo {
  height: 32px; width: auto; display: block;
  transition: filter .4s var(--ease);
}
/* light hero: logo stays full color both before and after scroll */
.site-header:not(.is-scrolled) .brand__logo { filter: none; }
.footer__logo { height: 30px; width: auto; display: block; filter: none; }
.brand__mark {
  width: 16px; height: 16px; border-radius: 4px;
  background: linear-gradient(135deg, var(--navy) 40%, var(--orange));
  transform: rotate(45deg);
}
.brand__name {
  font-family: var(--font-en);
  font-weight: 800; letter-spacing: .22em;
  font-size: 1.15rem; color: var(--navy-900);
}
/* light hero: dark/blue text stays legible before scroll */
.site-header:not(.is-scrolled) .brand__name { color: var(--navy-900); }
.site-header:not(.is-scrolled) .gnav a { color: var(--navy-700); }
.site-header:not(.is-scrolled) .nav-toggle span { background: var(--deep); }

.gnav ul { display: flex; gap: clamp(1.1rem, 2.4vw, 2.3rem); }
.gnav a {
  font-family: var(--font-en);
  font-weight: 600; font-size: .82rem; letter-spacing: .12em;
  color: var(--navy-700); position: relative; padding: .4rem 0;
  transition: color .25s var(--ease);
}
.gnav a::after {
  content: ""; position: absolute; left: 0; bottom: -2px;
  width: 100%; height: 2px; background: var(--orange);
  transform: scaleX(0); transform-origin: left; transition: transform .3s var(--ease);
}
.gnav a:hover { color: var(--navy); }
.gnav a:hover::after { transform: scaleX(1); }

.nav-toggle {
  display: none; width: 42px; height: 42px; border: 0; background: none;
  cursor: pointer; padding: 8px; flex-direction: column; justify-content: center; gap: 5px;
}
.nav-toggle span { display: block; height: 2px; width: 100%; background: var(--deep); border-radius: 2px; transition: transform .3s var(--ease), opacity .3s var(--ease); }
body.drawer-open .nav-toggle span:nth-child(1) { transform: translateY(7px) rotate(45deg); background: #fff; }
body.drawer-open .nav-toggle span:nth-child(2) { opacity: 0; }
body.drawer-open .nav-toggle span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); background: #fff; }

/* ---------- Mobile drawer ---------- */
.drawer {
  position: fixed; inset: 0; z-index: 90;
  background: linear-gradient(160deg, #127EC0, #0f6ba8);
  display: flex; align-items: center; justify-content: center;
  opacity: 0; visibility: hidden; transition: opacity .4s var(--ease), visibility .4s;
}
body.drawer-open .drawer { opacity: 1; visibility: visible; }
.drawer ul { text-align: center; display: grid; gap: 1.4rem; }
.drawer a {
  font-family: var(--font-en); font-weight: 700; letter-spacing: .14em;
  font-size: 1.5rem; color: #fff;
}
.drawer a:hover { color: var(--cream); }

/* ---------- Hero ---------- */
.hero {
  position: relative; min-height: 100vh;
  display: flex; align-items: center;
  color: var(--ink); overflow: hidden;
  /* translucent so the fixed network layer shows through strongest in the hero */
  background:
    radial-gradient(120% 95% at 72% 26%, rgba(126,186,222,.24) 0%, rgba(126,186,222,0) 58%),
    linear-gradient(158deg, rgba(238,245,252,.74) 0%, rgba(226,237,248,.72) 52%, rgba(214,230,244,.72) 100%);
}
.hero__bg { position: absolute; inset: 0; }
.hero__grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(18,126,192,.09) 1px, transparent 1px),
    linear-gradient(90deg, rgba(18,126,192,.09) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(120% 90% at 70% 30%, #000 40%, transparent 78%);
}
.hero__glow {
  position: absolute; width: 60vw; height: 60vw; right: -12vw; top: -10vw;
  background: radial-gradient(circle, rgba(126,186,222,.30), transparent 62%);
  filter: blur(20px);
}
.hero__inner { position: relative; z-index: 2; padding-block: 8rem 6rem; }
.hero__eyebrow {
  /* weight は M PLUS 1 の読み込み済みウェイト(400/500/700)に合わせて 500 */
  font-family: var(--font-en); font-weight: 500; letter-spacing: .3em;
  font-size: .8rem; color: var(--navy-700); margin: 0 0 1.5rem;
}
.hero__title {
  font-family: var(--font-en); font-weight: 800;
  font-size: clamp(2.75rem, 7.5vw, 5.75rem);
  line-height: 1.05; letter-spacing: .01em; margin: 0;
  color: var(--navy-900);
  text-shadow: 0 10px 40px rgba(18,126,192,.14);
}
.hero__catch {
  margin: 1.4rem 0 0; max-width: 30ch;
  font-family: var(--font-jp); font-weight: 700;
  font-size: clamp(1.15rem, 2.2vw, 1.7rem); line-height: 1.55;
  letter-spacing: .04em; color: var(--navy-700);
}
.hero__lead {
  margin: 1.1rem 0 0; max-width: 34ch;
  font-size: clamp(1rem, 1.4vw, 1.15rem); color: var(--muted); font-weight: 400;
}
.hero__actions { margin-top: 2.8rem; display: flex; gap: 1rem; flex-wrap: wrap; }

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  font-family: var(--font-jp); font-weight: 700; font-size: .95rem;
  padding: .95rem 2.1rem; border-radius: 999px;
  transition: transform .25s var(--ease), background .25s var(--ease), color .25s var(--ease), box-shadow .25s var(--ease);
  will-change: transform;
}
/* PRIMARY CTA = brand orange, used confidently as the lively accent */
.btn--primary { background: var(--orange); color: #fff; box-shadow: 0 10px 26px rgba(216,120,18,.32); }
.btn--primary:hover { background: var(--orange-600); transform: translateY(-3px); box-shadow: 0 16px 32px rgba(216,120,18,.42); }
.btn--ghost { border: 1.5px solid var(--blue-soft); color: var(--navy-900); }
.btn--ghost:hover { background: rgba(18,126,192,.08); border-color: var(--navy-900); transform: translateY(-3px); }

.hero__scroll {
  position: absolute; left: 50%; bottom: 2rem; transform: translateX(-50%);
  z-index: 2; display: grid; justify-items: center; gap: .7rem;
  font-family: var(--font-en); font-size: .68rem; letter-spacing: .3em; color: var(--navy-700);
}
.hero__scroll-line { width: 1px; height: 46px; background: rgba(18,126,192,.28); overflow: hidden; position: relative; }
.hero__scroll-line::after {
  content: ""; position: absolute; inset: 0; background: var(--orange);
  animation: scrollDown 2s var(--ease) infinite;
}
@keyframes scrollDown { 0% { transform: translateY(-100%);} 60%,100% { transform: translateY(100%);} }

/* ---------- Section base ---------- */
/* scroll-margin-top: 固定ヘッダー(スクロール時66px)の下に着地させ、見出し上の余白を守る */
.section { padding-block: var(--section-y); scroll-margin-top: 66px; }
.section__head { margin-bottom: clamp(2.5rem, 5vw, 4rem); }
.section__label {
  font-family: var(--font-en); font-weight: 700; letter-spacing: .28em;
  font-size: .78rem; color: #0f6ba8;
  display: inline-flex; align-items: center; gap: .7rem;
}
.section__label::before { content: ""; width: 28px; height: 2px; background: var(--orange); }
.section__label--light { color: #0f6ba8; }
.section__title {
  font-size: clamp(1.7rem, 3.4vw, 2.5rem); font-weight: 700;
  color: #0E4E7A; margin: 1rem 0 0; letter-spacing: .045em; line-height: 1.4;
}
.section__title--light { color: #0E4E7A; }
.section__desc { margin: 1rem 0 0; color: var(--muted); max-width: 52ch; }

/* ---------- Message ---------- */
.message { background: rgba(255,255,255,.93); text-align: center; }
.message__body { display: grid; gap: 1.4rem; place-items: center; }
.message__lead {
  font-size: clamp(1.35rem, 3.2vw, 2.15rem); font-weight: 700; line-height: 1.7;
  color: var(--navy-900); margin: 0; letter-spacing: .04em;
}
.message__txt {
  max-width: 60ch; margin: .2rem auto 0; color: var(--muted);
  font-size: clamp(.95rem, 1.4vw, 1.05rem); line-height: 2;
}
.message__en {
  font-family: var(--font-en); font-weight: 500; font-style: italic;
  color: var(--navy-500); font-size: clamp(.9rem, 1.6vw, 1.05rem); margin: .4rem 0 0; line-height: 1.8;
}

/* ---------- Strength ---------- */
.strength { background: linear-gradient(180deg, rgba(231,241,251,.82) 0%, rgba(223,234,247,.82) 100%); position: relative; overflow: hidden; }
.strength > .container { position: relative; z-index: 1; }
.strength__accent {
  position: absolute; left: -9vw; bottom: -10vw;
  width: min(42vw, 420px); height: min(42vw, 420px);
  z-index: 0; opacity: .45; pointer-events: none; will-change: transform;
}
.strength__accent .art-ring { fill: none; stroke: rgba(18,126,192,.18); stroke-width: 1; }
.strength__accent .art-ring--accent { stroke: rgba(18,126,192,.32); }
.strength__accent .art-node { fill: rgba(18,126,192,.3); }
.strength__accent .art-node--accent { fill: rgba(216,120,18,.6); }

.strengths { display: grid; grid-template-columns: repeat(3, 1fr); gap: clamp(1.2rem, 2vw, 1.6rem); }
.strength-card {
  background: linear-gradient(180deg, #ffffff 0%, #f4f9fe 100%);
  border: 1px solid var(--blue-line); border-radius: var(--radius);
  padding: clamp(1.8rem, 3vw, 2.6rem);
  box-shadow: 0 6px 22px rgba(18,126,192,.08);
  transition: transform .35s var(--ease), box-shadow .35s var(--ease), border-color .35s var(--ease);
  position: relative; overflow: hidden;
}
.strength-card::before {
  content: ""; position: absolute; left: 0; top: 0; height: 3px; width: 100%;
  background: var(--orange); transform: scaleX(0); transform-origin: left;
  transition: transform .4s var(--ease);
}
.strength-card:hover { transform: translateY(-5px); box-shadow: 0 20px 44px rgba(18,126,192,.14); border-color: var(--navy); }
.strength-card:hover::before { transform: scaleX(1); }
.strength-card__icon {
  width: 60px; height: 60px; display: inline-flex; align-items: center; justify-content: center;
  border-radius: 14px; color: var(--navy);
  background: linear-gradient(135deg, rgba(18,126,192,.10), rgba(216,120,18,.10));
  margin-bottom: 1.4rem; transition: color .35s var(--ease), transform .35s var(--ease);
}
.strength-card__icon svg { width: 32px; height: 32px; }
.strength-card:hover .strength-card__icon { color: var(--orange); transform: scale(1.06) rotate(-3deg); }
.strength-card__title { font-size: 1.25rem; font-weight: 700; color: #0F6BA8; margin: 0 0 .8rem; line-height: 1.5; }
.strength-card__txt { color: var(--muted); font-size: .95rem; margin: 0; }
/* staggered reveal */
.strengths .strength-card.reveal:nth-child(2) { transition-delay: 110ms; }
.strengths .strength-card.reveal:nth-child(3) { transition-delay: 220ms; }


/* parallax layers: GPU hint */
[data-parallax] { will-change: transform; }

/* ---------- Business ---------- */
/* translucent tint so the fixed network reads only as a whisper behind copy */
.business { background: rgba(255,255,255,.82); }

/* ---------- Business cards ---------- */
.cards {
  display: grid; gap: clamp(1.2rem, 2vw, 1.6rem);
  grid-template-columns: repeat(2, 1fr);
}
.card {
  background: linear-gradient(180deg, #ffffff 0%, #f5faff 100%);
  border: 1px solid var(--blue-line); border-radius: var(--radius);
  padding: clamp(1.8rem, 3vw, 2.6rem);
  display: flex; flex-direction: column;
  box-shadow: 0 6px 22px rgba(18,126,192,.08);
  transition: transform .35s var(--ease), box-shadow .35s var(--ease), border-color .35s var(--ease);
  position: relative; overflow: hidden;
}
.card::before {
  content: ""; position: absolute; left: 0; top: 0; height: 3px; width: 100%;
  background: var(--orange);
  transform: scaleX(0); transform-origin: left; transition: transform .4s var(--ease);
}
.card:hover { transform: translateY(-5px); box-shadow: 0 20px 44px rgba(18,126,192,.14); border-color: var(--navy); }
.card:hover::before { transform: scaleX(1); }
.card__top { display: flex; align-items: center; justify-content: space-between; margin-bottom: 1.4rem; }
.card__no {
  font-family: var(--font-en); font-weight: 800; font-size: 2.4rem;
  color: var(--line); line-height: 1; letter-spacing: .02em; transition: color .35s var(--ease);
}
.card:hover .card__no { color: rgba(18,126,192,.35); }
.card__icon { width: 48px; height: 48px; color: var(--navy); }
.card:hover .card__icon { color: #0F6BA8; }
.card__icon svg { width: 100%; height: 100%; transition: color .35s var(--ease); }
.card__title { font-size: 1.25rem; font-weight: 700; color: #0F6BA8; margin: 0 0 .9rem; line-height: 1.5; }
.card__txt { color: var(--muted); font-size: .95rem; margin: 0 0 1.4rem; flex-grow: 1; }
.card__tags { display: flex; flex-wrap: wrap; gap: .5rem; margin-bottom: 1.6rem; }
.card__tags li {
  font-size: .76rem; color: var(--navy-700); background: var(--bg-soft);
  border: 1px solid var(--blue-line); padding: .3rem .7rem; border-radius: 999px;
}
.card__more {
  font-family: var(--font-en); font-weight: 700; font-size: .85rem; letter-spacing: .06em;
  /* navy-700: 白地カード上で 4.5:1 を確実に満たす青（--navy は 4.39 で僅かに未達） */
  color: var(--navy-700); display: inline-flex; align-items: center; gap: .5rem;
  transition: gap .25s var(--ease), color .25s var(--ease);
}
.card__more span { transition: transform .25s var(--ease); }
.card__more:hover { color: var(--orange); }
.card__more:hover span { transform: translateX(4px); }

/* 5th business card spans full width so the 2-col grid stays balanced */
.card--ai { grid-column: 1 / -1; }
.card--ai .card__no { color: rgba(18,126,192,.28); }

/* ---------- AI・先端技術 (deep-blue differentiator band) ---------- */
.ai {
  position: relative; overflow: hidden; color: #fff;
  /* deep navy band, slightly translucent so the network shows through.
     基準内で最も明るい紺にそろえ、濃淡は横方向のみ（縦スクロール中に色が変わって見えないように）。
     最明端 rgba(11,79,128,.92) は「カードのガラス(+8%白)＋ホバー(+14%白)」の上でも
     白文字が 4.5:1 (WCAG AA) を満たす上限。これ以上明るくする時は再計算すること。 */
  background: linear-gradient(100deg, rgba(9,66,108,.92) 0%, rgba(11,79,128,.92) 100%);
}
.ai__bg {
  position: absolute; inset: 0; z-index: 0; pointer-events: none; opacity: .55;
  -webkit-mask-image: radial-gradient(130% 120% at 78% 20%, #000 28%, transparent 84%);
          mask-image: radial-gradient(130% 120% at 78% 20%, #000 28%, transparent 84%);
}
.ai::after {
  content: ""; position: absolute; left: -10vw; bottom: -12vw; z-index: 0;
  width: 42vw; height: 42vw; border-radius: 50%; pointer-events: none;
  background: radial-gradient(circle, rgba(216,120,18,.22), transparent 68%);
}
.ai__art { position: absolute; inset: -8% -4%; width: 108%; height: 116%; will-change: transform; }
.ai__art .art-line { stroke: rgba(255,255,255,.42); stroke-width: 1; fill: none; }
.ai__art .art-node { fill: rgba(255,255,255,.9); }
.ai__art .art-node--accent { fill: #F0A24E; }
.ai__inner { position: relative; z-index: 1; }
.section__label--ai { color: #d5ecfa; }
.section__label--ai::before { background: var(--orange); }
.section__title--ai { color: #fff; }
.ai__body {
  margin: 1.4rem 0 0; max-width: 62ch; color: rgba(255,255,255,.95);
  font-size: 1.02rem; line-height: 2;
}
.ai-cards {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: clamp(1.2rem, 2vw, 1.6rem); margin-top: clamp(2.4rem, 5vw, 3.4rem);
}
.ai-card {
  position: relative; overflow: hidden;
  background: rgba(255,255,255,.08); border: 1px solid rgba(255,255,255,.22);
  border-radius: var(--radius); padding: clamp(1.6rem, 3vw, 2.2rem);
  -webkit-backdrop-filter: blur(6px); backdrop-filter: blur(6px);
  transition: transform .35s var(--ease), box-shadow .35s var(--ease),
              border-color .35s var(--ease), background .35s var(--ease);
}
.ai-card::before {
  content: ""; position: absolute; left: 0; top: 0; height: 3px; width: 100%;
  background: var(--orange);
  transform: scaleX(0); transform-origin: left; transition: transform .4s var(--ease);
}
.ai-card:hover {
  transform: translateY(-5px); background: rgba(255,255,255,.14);
  border-color: rgba(255,255,255,.5); box-shadow: 0 20px 44px rgba(0,0,0,.24);
}
.ai-card:hover::before { transform: scaleX(1); }
.ai-card__icon { display: block; width: 44px; height: 44px; color: #cfe8f9; margin-bottom: 1.2rem; }
.ai-card__icon svg { width: 100%; height: 100%; transition: color .35s var(--ease); }
.ai-card:hover .ai-card__icon { color: #F0A24E; }
.ai-card__title { font-size: 1.25rem; font-weight: 700; color: #fff; margin: 0 0 .8rem; line-height: 1.5; }
.ai-card__txt { color: rgba(255,255,255,.94); font-size: .95rem; margin: 0; }
.ai-cards .ai-card.reveal:nth-child(2) { transition-delay: 110ms; }
.ai-cards .ai-card.reveal:nth-child(3) { transition-delay: 220ms; }

/* HEDY — self-developed AI product highlight panel */
.ai-hedy {
  position: relative; overflow: hidden;
  margin-top: clamp(1.2rem, 2vw, 1.6rem);
  display: flex; align-items: center; gap: clamp(1.2rem, 3vw, 2.4rem);
  flex-wrap: wrap;
  padding: clamp(1.8rem, 3.4vw, 2.6rem);
  border-radius: var(--radius);
  /* ガラスの白は .12 まで：帯の最も明るい端の上でも本文 4.5:1 を維持する上限 */
  background: linear-gradient(120deg, rgba(255,255,255,.12), rgba(255,255,255,.05));
  border: 1px solid rgba(255,255,255,.34);
  box-shadow: 0 20px 46px rgba(0,0,0,.22);
  -webkit-backdrop-filter: blur(8px); backdrop-filter: blur(8px);
}
.ai-hedy::before {
  content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 4px;
  background: linear-gradient(180deg, var(--orange), #F0A24E);
}
.ai-hedy__badge {
  flex: none; align-self: flex-start;
  display: inline-block; padding: .4rem .9rem; border-radius: 999px;
  font-size: .72rem; font-weight: 700; letter-spacing: .14em;
  color: #fff; background: rgba(216,120,18,.9);
  box-shadow: 0 6px 16px rgba(216,120,18,.34);
}
.ai-hedy__body { flex: 1 1 320px; min-width: 0; }
.ai-hedy__title {
  font-size: clamp(1.2rem, 2.4vw, 1.5rem); font-weight: 700; color: #fff;
  margin: 0 0 .8rem; line-height: 1.5;
}
.ai-hedy__txt { color: rgba(255,255,255,.94); font-size: 1rem; line-height: 1.95; margin: 0; }


/* ---------- Company ---------- */
.company { background: rgba(238,244,251,.82); }
.company__grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: clamp(1.2rem, 2vw, 1.6rem); }
.corp {
  background: linear-gradient(180deg, #ffffff 0%, #f4f9fe 100%);
  border: 1px solid var(--blue-line); border-radius: var(--radius);
  padding: clamp(1.6rem, 3vw, 2.3rem);
  box-shadow: 0 5px 18px rgba(18,126,192,.07);
  transition: transform .3s var(--ease), box-shadow .3s var(--ease), border-color .3s var(--ease);
}
.corp:hover { transform: translateY(-4px); box-shadow: 0 18px 40px rgba(18,126,192,.14); border-color: var(--navy); }
.corp__name {
  font-size: 1.1rem; font-weight: 700; color: #0F6BA8; margin: 0 0 1.2rem;
  padding-bottom: 1rem; border-bottom: 2px solid var(--cream); position: relative;
}
.corp__name::after { content: ""; position: absolute; left: 0; bottom: -2px; width: 48px; height: 2px; background: var(--orange); }
.corp__dl { display: grid; gap: .7rem; margin: 0; }
.corp__dl > div { display: grid; grid-template-columns: 5.5em 1fr; gap: .6rem; align-items: start; }
.corp__dl dt { font-size: .82rem; color: var(--navy-700); font-weight: 700; margin: 0; }
.corp__dl dd { margin: 0; font-size: .9rem; color: var(--ink); }

/* ---------- Footer ---------- */
.site-footer { background: rgba(238,246,252,.92); color: var(--ink); padding-block: clamp(3rem, 6vw, 4.5rem) 2rem; border-top: 1px solid var(--blue-line); }
.footer__inner { display: flex; justify-content: space-between; align-items: flex-start; gap: 2rem; flex-wrap: wrap; }
.brand__name--footer { color: var(--navy-900); font-size: 1.5rem; }
.footer__tag { font-family: var(--font-en); color: var(--muted); font-size: .85rem; margin: .6rem 0 0; letter-spacing: .04em; }
.footer__nav ul { display: flex; gap: 1.6rem; flex-wrap: wrap; }
.footer__nav a { font-family: var(--font-en); font-weight: 600; font-size: .82rem; letter-spacing: .1em; color: var(--navy-700); transition: color .25s var(--ease); }
.footer__nav a:hover { color: var(--orange); }
.copyright {
  margin: clamp(2.5rem, 5vw, 3.5rem) 0 0; padding-top: 1.6rem;
  border-top: 1px solid var(--line);
  font-family: var(--font-en); font-size: .74rem; letter-spacing: .06em; color: var(--muted); text-align: center;
}

/* ---------- Reveal on scroll ---------- */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .8s var(--ease), transform .8s var(--ease); }
.reveal.is-visible { opacity: 1; transform: none; }
.cards .card.reveal { transition-delay: calc(var(--i, 0) * 90ms); }

/* ---------- Responsive ---------- */
.br-sp { display: none; }

@media (max-width: 900px) {
  .cards { grid-template-columns: 1fr; }
  .company__grid { grid-template-columns: 1fr; }
  .information__stats { grid-template-columns: repeat(2, 1fr); gap: 2rem 1rem; }
  .strengths { grid-template-columns: 1fr; }
  .ai-cards { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  .gnav { display: none; }
  .nav-toggle { display: flex; }
  .br-sp { display: inline; }
  .hero { min-height: 90vh; }
  .hero__inner { padding-block: 7rem 5rem; text-align: center; }
  .hero__catch, .hero__lead { margin-left: auto; margin-right: auto; }
  .hero__actions { justify-content: center; }
  /* 社名の肩書きは、スマホでは細い線＋控えめの静かな見出しに（案1） */
  .hero__eyebrow {
    display: flex; align-items: center; justify-content: center; gap: .7rem;
    font-weight: 500; font-size: .74rem; letter-spacing: .16em;
    color: var(--muted); margin-bottom: 1.4rem;
  }
  .hero__eyebrow::before { content: ""; width: 26px; height: 1px; background: var(--navy-700); opacity: .55; }
  .footer__inner { flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  * { scroll-behavior: auto !important; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .hero__scroll-line::after { animation: none; }
  /* freeze parallax layers at their resting position */
  [data-parallax] { transform: none !important; }
  .hero__inner { transform: none !important; opacity: 1 !important; }
}