/*
 * 見た目の方針（オーナーの選択：公的な落ち着き・信頼感／背景は白）
 * - 色はロゴから取る：墨（文字）・灰（ロゴの字）・朱（ロゴの四角）。朱は細い線と印にだけ使う
 * - 見出しは明朝、本文はゴシック
 * - 中身は画面の中央にそろえる。読む文章は幅を絞り、一覧や帯は広く使う
 * - 端末が暗い表示の設定でも白で出す（オーナーの指定）
 * 色と寸法は :root にだけ書く
 */
:root {
  --bg: #ffffff;
  --fg: #1c1c1e;
  --muted: #5f5d5e;
  --line: #e2e0dc;
  --surface: #f6f6f4;
  --ink: #1c1c1e;
  --on-ink: #ffffff;
  --link: #1f3f73;
  --seal: #b5121b;
  --dark: #15171c;
  --serif: "Noto Serif JP", "Hiragino Mincho ProN", "Yu Mincho", serif;
  --sans: system-ui, -apple-system, "Hiragino Sans", "Noto Sans JP", "Yu Gothic UI", sans-serif;
  --container: 1160px;
  --reading: 780px;
  --radius: 4px;
  --shadow: 0 1px 2px rgba(20, 20, 30, 0.04), 0 8px 24px rgba(20, 20, 30, 0.06);
  color-scheme: light;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  margin: 0;
  overflow-x: clip;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.9;
  letter-spacing: 0.02em;
}
a { color: var(--link); text-underline-offset: 0.2em; }
a:hover { text-decoration-thickness: 2px; }
img { max-width: 100%; height: auto; }
:focus-visible { outline: 2px solid var(--seal); outline-offset: 2px; }
h1, h2, h3 { font-family: var(--serif); font-weight: 600; letter-spacing: 0.04em; line-height: 1.5; }

.wrap { width: min(100% - 32px, var(--container)); margin-inline: auto; }
.center { text-align: center; }

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

/* ── 頭 ── */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 255, 255, 0.97);
  border-top: 3px solid var(--seal);
  border-bottom: 1px solid var(--line);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 76px; }
.brand { display: inline-flex; align-items: center; min-height: 44px; flex: none; }
.brand img { display: block; height: 52px; width: auto; }

.nav-list { list-style: none; margin: 0; padding: 0; display: flex; align-items: center; gap: 2px; }
.nav-item { position: relative; }
.nav-link {
  display: inline-flex; align-items: center; gap: 4px; min-height: 44px; padding: 0 12px;
  color: var(--fg); text-decoration: none; font-size: 0.95rem; font-weight: 500; white-space: nowrap;
}
.nav-link:hover, .nav-link[aria-current="page"] { color: var(--seal); }
.caret { width: 14px; height: 14px; fill: none; stroke: currentColor; stroke-width: 2; }
.sub-list {
  list-style: none; margin: 0; padding: 8px 0;
  position: absolute; top: 100%; left: 0; min-width: 280px;
  background: #fff; border: 1px solid var(--line); border-top: 2px solid var(--seal);
  box-shadow: var(--shadow);
  opacity: 0; visibility: hidden; transform: translateY(4px); transition: opacity 0.15s, transform 0.15s, visibility 0.15s;
}
.has-sub:hover > .sub-list, .has-sub:focus-within > .sub-list { opacity: 1; visibility: visible; transform: none; }
.sub-list a { display: flex; align-items: center; min-height: 44px; padding: 0 18px; color: var(--fg); text-decoration: none; font-size: 0.92rem; }
.sub-list a:hover, .sub-list a[aria-current="page"] { background: var(--surface); color: var(--seal); }
.nav-cta {
  display: inline-flex; align-items: center; min-height: 44px; padding: 0 20px; margin-left: 8px;
  background: var(--ink); color: #fff; text-decoration: none; font-weight: 600; font-size: 0.92rem; border-radius: var(--radius);
}
.nav-cta:hover { background: var(--seal); text-decoration: none; }

.menu-button { display: none; }

/* 幅の狭い画面：メニューを畳み、開くと縦に並べる */
@media (max-width: 1023px) {
  .header-inner { min-height: 64px; flex-wrap: wrap; }
  .brand img { height: 42px; }
  .js .menu-button {
    display: inline-flex; flex-direction: column; align-items: center; justify-content: center;
    min-width: 52px; min-height: 48px; padding: 0; border: 1px solid var(--line); border-radius: var(--radius);
    background: #fff; color: var(--fg); cursor: pointer; font: inherit;
  }
  .bars, .bars::before, .bars::after { display: block; width: 20px; height: 2px; background: currentColor; position: relative; transition: transform 0.2s; }
  .bars::before, .bars::after { content: ""; position: absolute; left: 0; }
  .bars::before { top: -6px; }
  .bars::after { top: 6px; }
  .is-open .bars { background: transparent; }
  .is-open .bars::before { transform: translateY(6px) rotate(45deg); }
  .is-open .bars::after { transform: translateY(-6px) rotate(-45deg); }
  .menu-button-label { font-size: 0.62rem; line-height: 1; margin-top: 9px; }

  .global-nav { width: 100%; padding-bottom: 12px; }
  .js .global-nav { display: none; }
  .js .is-open .global-nav { display: block; max-height: calc(100vh - 70px); overflow-y: auto; }
  .nav-list { flex-direction: column; align-items: stretch; gap: 0; }
  .nav-item { border-top: 1px solid var(--line); }
  .nav-link { width: 100%; padding: 0 4px; font-weight: 600; }
  .caret { display: none; }
  .sub-list { position: static; opacity: 1; visibility: visible; transform: none; border: 0; box-shadow: none; padding: 0 0 8px; min-width: 0; }
  .sub-list a { padding: 0 4px 0 16px; }
  .nav-cta { width: 100%; justify-content: center; margin: 12px 0 0; }
}

/* ── 下層ページの見出しの帯（元サイトが下層ページに敷いていた画像） ── */
.page-band { position: relative; background: var(--dark) url("/images/page-band.jpg") center / cover no-repeat; color: #fff; text-align: center; }
.page-band::after { content: ""; position: absolute; inset: 0; background: rgba(14, 16, 22, 0.5); }
.page-band .wrap { position: relative; z-index: 1; padding-block: clamp(48px, 8vw, 88px); }
.page-band h1 { margin: 0; font-size: clamp(1.6rem, 4.4vw, 2.4rem); letter-spacing: 0.08em; }
.page-band h1::after { content: ""; display: block; width: 44px; height: 3px; background: var(--seal); margin: 16px auto 0; }

/* ── 下層ページの本文：中央の読みやすい幅 ── */
.main-page { padding-block: clamp(40px, 6vw, 72px) clamp(56px, 8vw, 96px); }
.prose { max-width: var(--reading); margin-inline: auto; overflow-wrap: anywhere; }
.prose > :first-child { margin-top: 0; }
.prose h2 {
  font-size: clamp(1.3rem, 3vw, 1.55rem); margin: 2.6em 0 0.9em; padding-bottom: 0.45em;
  border-bottom: 1px solid var(--line); display: flex; align-items: baseline; gap: 0.6em;
}
.prose h2::before { content: ""; flex: none; width: 0.5em; height: 0.5em; background: var(--seal); transform: translateY(-0.1em); }
.prose h3 { font-size: 1.15rem; margin: 2em 0 0.6em; }
.prose table { border-collapse: collapse; width: 100%; display: block; overflow-x: auto; font-size: 0.94rem; line-height: 1.7; margin: 1.4em 0; }
.prose th, .prose td { border: 1px solid var(--line); padding: 10px 14px; text-align: left; vertical-align: top; }
.prose th { background: var(--surface); font-weight: 600; white-space: nowrap; }
.prose blockquote { margin: 1.4em 0; padding: 4px 0 4px 18px; border-left: 3px solid var(--line); color: var(--muted); }
.prose hr { border: 0; border-top: 1px solid var(--line); margin: 2.4em 0; }
.prose ol, .prose ul { padding-left: 1.4em; }
.prose li + li { margin-top: 0.3em; }
.lead { font-size: 1.08rem; color: var(--muted); margin-bottom: 2em; padding: 20px 24px; background: var(--surface); border-left: 3px solid var(--seal); }

/* ── ボタン ── */
.cta { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.cta.center { justify-content: center; }
.button {
  display: inline-flex; align-items: center; justify-content: center; min-height: 52px; padding: 0 28px;
  border-radius: var(--radius); background: var(--ink); color: var(--on-ink); border: 1px solid var(--ink);
  text-decoration: none; font-weight: 600; letter-spacing: 0.04em; transition: background 0.15s, color 0.15s, border-color 0.15s;
}
.button:hover { background: var(--seal); border-color: var(--seal); text-decoration: none; }
.button.outline { background: transparent; color: var(--ink); }
.button.outline:hover { background: var(--ink); color: #fff; border-color: var(--ink); }
.button.ghost { background: transparent; color: #fff; border-color: rgba(255, 255, 255, 0.85); }
.button.ghost:hover { background: #fff; color: var(--ink); border-color: #fff; }

/* ── トップ：画面幅いっぱいのバナー（元サイトの主画像5枚を切り替える） ── */
.main-wide { padding: 0; }
.hero {
  position: relative; overflow: hidden; color: #fff; background: var(--dark);
  min-height: clamp(520px, 78vh, 760px); display: flex; align-items: center;
}
.hero-slides, .hero-slide, .hero-slide img { position: absolute; inset: 0; width: 100%; height: 100%; }
.hero-slide { opacity: 0; transition: opacity 1.2s ease; }
.hero-slide.is-active { opacity: 1; }
.hero-slide img { object-fit: cover; transform: scale(1.04); transition: transform 7s ease-out; }
.hero-slide.is-active img { transform: scale(1); }
@media (prefers-reduced-motion: reduce) {
  .hero-slide, .hero-slide img { transition: none; transform: none; }
}
.hero::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: linear-gradient(90deg, rgba(12, 14, 20, 0.85) 0%, rgba(12, 14, 20, 0.6) 50%, rgba(12, 14, 20, 0.2) 100%);
}
.hero-inner { position: relative; z-index: 1; width: min(100% - 32px, var(--container)); margin-inline: auto; padding-block: 72px 112px; }
.hero-inner > * { max-width: 640px; }
.hero-eyebrow { margin: 0 0 12px; font-size: 0.78rem; letter-spacing: 0.24em; text-transform: uppercase; color: rgba(255, 255, 255, 0.75); }
.hero h1 { margin: 0; font-size: clamp(2.1rem, 6vw, 3.6rem); line-height: 1.3; color: #fff; }
.hero h1::after { content: ""; display: block; width: 56px; height: 3px; background: var(--seal); margin-top: 22px; }
.hero-text { margin: 22px 0 0; font-size: clamp(1rem, 2vw, 1.12rem); color: rgba(255, 255, 255, 0.92); }
.hero strong { color: #fff; }
.hero .button:not(.ghost) { background: #fff; color: var(--ink); border-color: #fff; }
.hero .button:not(.ghost):hover { background: var(--seal); color: #fff; border-color: var(--seal); }

.hero-controls {
  position: absolute; z-index: 2; left: 50%; bottom: 28px; transform: translateX(-50%);
  width: min(100% - 32px, var(--container)); display: flex; align-items: center; gap: 12px;
}
.hero-arrow, .hero-pause {
  display: inline-flex; align-items: center; justify-content: center; width: 44px; height: 44px; padding: 0;
  border: 1px solid rgba(255, 255, 255, 0.6); border-radius: 50%; background: rgba(0, 0, 0, 0.2); color: #fff; cursor: pointer;
}
.hero-arrow:hover, .hero-pause:hover { background: rgba(255, 255, 255, 0.2); }
.hero-arrow svg, .hero-pause svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 2; }
.hero-pause .i-play { display: none; fill: currentColor; stroke: none; }
.hero-pause[aria-pressed="true"] .i-play { display: block; }
.hero-pause[aria-pressed="true"] .i-pause { display: none; }
.hero-dots { display: flex; align-items: center; }
.hero-dots button { width: 44px; height: 44px; padding: 0; border: 0; background: transparent; cursor: pointer; position: relative; }
.hero-dots button::before {
  content: ""; position: absolute; left: 50%; top: 50%; width: 28px; height: 3px; transform: translate(-50%, -50%);
  background: rgba(255, 255, 255, 0.45); transition: background 0.2s;
}
.hero-dots button[aria-current="true"]::before { background: #fff; }
@media (max-width: 599px) {
  .hero { min-height: 600px; align-items: flex-end; }
  .hero::after { background: linear-gradient(180deg, rgba(12, 14, 20, 0.35) 0%, rgba(12, 14, 20, 0.88) 55%); }
  .hero-inner { padding-block: 96px 100px; }
  .hero-arrow { display: none; }
  .hero .cta .button { width: 100%; }
  .hero-dots button { width: 36px; }
  .hero-dots button::before { width: 22px; }
}

/* ── トップ：帯（セクション） ── */
.section { padding-block: clamp(64px, 9vw, 112px); }
.section.tinted { background: var(--surface); }
.section-head { text-align: center; max-width: 760px; margin: 0 auto clamp(36px, 5vw, 56px); }
.eyebrow { margin: 0 0 8px; font-size: 0.78rem; letter-spacing: 0.24em; text-transform: uppercase; color: var(--seal); font-weight: 600; }
.section-title { margin: 0; font-size: clamp(1.6rem, 4vw, 2.2rem); }
.section-title::after { content: ""; display: block; width: 40px; height: 2px; background: var(--seal); margin: 18px auto 0; }
.split .section-title::after { margin-left: 0; }
.section-lead { margin: 20px 0 0; color: var(--muted); }

.split { display: grid; gap: clamp(32px, 5vw, 64px); align-items: center; }
@media (min-width: 900px) { .split { grid-template-columns: 1fr 1fr; } }
.split p { color: #333; }
.split-figure { margin: 0; }
.split-figure img { display: block; width: 100%; height: auto; box-shadow: var(--shadow); }

.role-grid, .principles, .usecase-grid, .link-grid { list-style: none; margin: 0; padding: 0; display: grid; gap: 20px; }
.role-grid { grid-template-columns: repeat(auto-fit, minmax(min(100%, 260px), 1fr)); }
.role-card { background: #fff; padding: 32px 28px; border-top: 3px solid var(--ink); box-shadow: var(--shadow); text-align: center; }
.role-icon { width: 48px; height: 48px; fill: none; stroke: var(--seal); stroke-width: 1.5; stroke-linecap: round; stroke-linejoin: round; }
.role-card h3 { margin: 12px 0 8px; font-size: 1.2rem; }
.role-card p { margin: 0; color: var(--muted); font-size: 0.95rem; text-align: left; }
.role-card .more { display: inline-block; margin-top: 14px; font-size: 0.9rem; font-weight: 600; }

.principles { grid-template-columns: repeat(auto-fit, minmax(min(100%, 200px), 1fr)); }
.principles li { padding: 28px 24px; border: 1px solid var(--line); background: #fff; }
.principle-no { display: block; font-family: var(--serif); font-size: 2rem; line-height: 1; color: var(--seal); letter-spacing: 0.04em; }
.principles h3 { margin: 14px 0 8px; font-size: 1.1rem; }
.principles p { margin: 0; color: var(--muted); font-size: 0.92rem; }

.scope-grid { display: grid; gap: 20px; grid-template-columns: repeat(auto-fit, minmax(min(100%, 300px), 1fr)); max-width: 960px; margin-inline: auto; }
.scope-card { background: #fff; padding: 32px; box-shadow: var(--shadow); }
.scope-card h3 { margin: 0 0 12px; font-size: 1.2rem; display: flex; align-items: center; gap: 10px; }
.scope-card h3 span { display: inline-flex; align-items: center; justify-content: center; width: 32px; height: 32px; border-radius: 50%; font-family: var(--sans); font-size: 1rem; color: #fff; }
.scope-card.can h3 span { background: #1f6f43; }
.scope-card.cannot h3 span { background: var(--muted); }
.scope-card ul { margin: 0; padding-left: 1.2em; }
.scope-note { max-width: 960px; margin: 24px auto 0; text-align: center; font-size: 0.9rem; color: var(--muted); }

.usecase-grid { grid-template-columns: repeat(auto-fill, minmax(min(100%, 320px), 1fr)); }
.usecase-card { display: flex; height: 100%; background: #fff; border: 1px solid var(--line); text-decoration: none; color: var(--fg); transition: box-shadow 0.2s, transform 0.2s; }
.usecase-card:hover { box-shadow: var(--shadow); transform: translateY(-2px); }
.usecase-card img { flex: none; width: 112px; height: auto; aspect-ratio: 310 / 440; object-fit: cover; }
.usecase-body { display: flex; flex-direction: column; justify-content: center; padding: 16px 20px; }
.usecase-title { font-family: var(--serif); font-weight: 600; font-size: 1.12rem; }
.usecase-summary { margin-top: 6px; font-size: 0.86rem; color: var(--muted); line-height: 1.7; }
.section .center { margin-top: 40px; }

.link-grid { grid-template-columns: repeat(auto-fit, minmax(min(100%, 240px), 1fr)); }
.link-card { display: block; height: 100%; padding: 28px 24px; background: #fff; border: 1px solid var(--line); border-top: 3px solid var(--seal); text-decoration: none; color: var(--fg); transition: box-shadow 0.2s; }
.link-card:hover { box-shadow: var(--shadow); }
.link-card strong { display: block; font-family: var(--serif); font-size: 1.15rem; margin-bottom: 6px; }
.link-card span { display: block; color: var(--muted); font-size: 0.9rem; line-height: 1.7; }

/* ── 一覧（活用分野・よくある質問） ── */
.cards { list-style: none; padding: 0; display: grid; gap: 16px; grid-template-columns: repeat(auto-fill, minmax(min(100%, 240px), 1fr)); }
.cards li { border: 1px solid var(--line); border-top: 3px solid var(--ink); padding: 20px 22px; background: #fff; transition: box-shadow 0.2s; }
.cards li:hover { box-shadow: var(--shadow); }
.cards a { font-weight: 600; font-family: var(--serif); font-size: 1.08rem; }
.cards p { margin: 6px 0 0; font-size: 0.88rem; color: var(--muted); line-height: 1.7; }
.prose:has(> .cards) { max-width: var(--container); }
.faq { border-bottom: 1px solid var(--line); }
.faq:first-of-type { border-top: 1px solid var(--line); }
.faq summary { cursor: pointer; font-weight: 600; min-height: 60px; display: flex; align-items: center; gap: 0.8em; list-style: none; padding-right: 32px; position: relative; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::before { content: "Q"; flex: none; font-family: var(--serif); color: var(--seal); font-weight: 700; font-size: 1.2rem; }
.faq summary::after { content: "+"; position: absolute; right: 4px; font-size: 1.4rem; font-weight: 400; color: var(--muted); }
.faq[open] summary::after { content: "−"; }
.faq > :not(summary) { padding-left: 2em; }

/* ── 足の上のお問い合わせの帯 ── */
.footer-cta { background: var(--dark) url("/images/page-band.jpg") center / cover no-repeat; color: #fff; position: relative; }
.footer-cta::after { content: ""; position: absolute; inset: 0; background: rgba(14, 16, 22, 0.6); }
.footer-cta-inner { position: relative; z-index: 1; display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 24px; padding-block: clamp(40px, 6vw, 64px); }
.footer-cta-title { margin: 0; font-family: var(--serif); font-size: clamp(1.3rem, 3vw, 1.7rem); font-weight: 600; }
.footer-cta-text { margin: 8px 0 0; color: rgba(255, 255, 255, 0.85); }
.footer-cta-actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 0; }
.footer-cta .button { background: #fff; color: var(--ink); border-color: #fff; }
.footer-cta .button:hover { background: var(--seal); color: #fff; border-color: var(--seal); }
.footer-cta .button.outline { background: transparent; color: #fff; border-color: rgba(255, 255, 255, 0.85); }
.footer-cta .button.outline:hover { background: #fff; color: var(--ink); }

/* ── 足 ── */
.site-footer { background: #fff; color: var(--muted); font-size: 0.88rem; border-top: 1px solid var(--line); }
.footer-grid { display: grid; gap: 36px 32px; padding-block: 56px 40px; grid-template-columns: repeat(auto-fit, minmax(min(100%, 180px), 1fr)); }
.footer-about { grid-column: 1 / -1; }
@media (min-width: 1024px) {
  .footer-grid { grid-template-columns: 1.6fr repeat(5, 1fr); }
  .footer-about { grid-column: auto; }
}
.footer-brand { margin: 0 0 12px; }
.footer-brand img { display: block; height: 48px; width: auto; }
.footer-address { font-style: normal; line-height: 1.8; margin-bottom: 12px; }
.footer-note { margin: 0; font-size: 0.8rem; line-height: 1.8; }
.footer-heading { margin: 0 0 10px; font-weight: 700; color: var(--fg); font-size: 0.9rem; letter-spacing: 0.06em; padding-bottom: 8px; border-bottom: 2px solid var(--seal); display: inline-block; }
.footer-heading a { color: inherit; text-decoration: none; }
.footer-links { list-style: none; padding: 0; margin: 0; }
.footer-links a { display: inline-flex; align-items: center; min-height: 36px; color: var(--fg); text-decoration: none; }
.footer-links a:hover { color: var(--seal); text-decoration: underline; }
.footer-links-dense a { min-height: 32px; }
@media (max-width: 599px) { .footer-links a, .footer-links-dense a { min-height: 44px; } }
.footer-bottom { background: var(--dark); color: rgba(255, 255, 255, 0.75); font-size: 0.8rem; }
.footer-bottom-inner { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px; padding-block: 16px; }
.footer-bottom p { margin: 0; }
.footer-tagline { font-family: var(--serif); letter-spacing: 0.12em; }

/* ── 下書き（仮の住所でだけ出る） ── */
.draft-badge {
  position: fixed; z-index: 60; right: 12px; bottom: 12px; max-width: min(420px, calc(100% - 24px)); margin: 0;
  padding: 8px 12px; border: 1px solid #d97706; background: #fffbeb; color: #78350f; font-size: 0.78rem; line-height: 1.6;
  box-shadow: var(--shadow);
}

/* ── お問い合わせのフォーム ── */
.site-form { margin-top: 2em; padding: clamp(20px, 4vw, 36px); border: 1px solid var(--line); border-top: 3px solid var(--seal); background: #fff; }
.form-grid { display: grid; gap: 0 20px; grid-template-columns: repeat(auto-fit, minmax(min(100%, 260px), 1fr)); }
.form-row { margin-bottom: 18px; }
.form-row label { display: block; font-weight: 600; font-size: 0.92rem; margin-bottom: 6px; }
.req { display: inline-block; margin-left: 8px; padding: 0 6px; font-size: 0.72rem; line-height: 1.6; color: #fff; background: var(--seal); border-radius: 2px; vertical-align: 1px; }
.site-form input, .site-form select, .site-form textarea {
  width: 100%; min-height: 48px; padding: 10px 12px; font: inherit; font-size: 16px; color: var(--fg);
  border: 1px solid #c9c6c0; border-radius: var(--radius); background: #fff;
}
.site-form textarea { resize: vertical; line-height: 1.7; }
.site-form :is(input, select, textarea):focus { outline: 2px solid var(--seal); outline-offset: 0; border-color: var(--seal); }
.site-form [aria-invalid="true"] { border-color: var(--seal); background: #fff7f7; }
.form-hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.form-note { font-size: 0.85rem; color: var(--muted); }
.form-actions { margin: 8px 0 0; }
.form-actions .button { min-width: 200px; }
.form-actions .button:disabled { opacity: 0.6; cursor: wait; }
.form-status { margin: 12px 0 0; font-weight: 600; }
.form-status.is-error { color: var(--seal); }
.form-status.is-error::before { content: "✕ "; }
.form-status.is-success { color: #1f6f43; }
.form-status.is-success::before { content: "✓ "; }

/* ── 活用分野の一覧（企画書 16章） ── */
.prose.wide { max-width: var(--container); }
.usecase-list { list-style: none; padding: 0; margin: 2em 0; display: grid; gap: 20px; grid-template-columns: repeat(auto-fill, minmax(min(100%, 480px), 1fr)); }
.usecase-item { display: flex; gap: 20px; padding: 20px; border: 1px solid var(--line); border-top: 3px solid var(--seal); background: #fff; scroll-margin-top: 96px; }
.usecase-item img { flex: none; width: 96px; height: auto; aspect-ratio: 310 / 440; object-fit: cover; }
.usecase-item h2 { margin: 0 0 8px; padding: 0; border: 0; font-size: 1.25rem; }
.usecase-item h2::before { display: none; }
.usecase-item dl { margin: 0; display: grid; grid-template-columns: auto 1fr; gap: 4px 12px; font-size: 0.92rem; line-height: 1.7; }
.usecase-item dt { color: var(--muted); white-space: nowrap; }
.usecase-item dd { margin: 0; }
.prose li + li.usecase-item { margin-top: 0; }