/* ==========================================================================
   s-cleans.jp — corporate  |  design tokens follow docs/PROPOSAL.md §3
   ========================================================================== */
:root {
  --c-primary: #1B3A5C;      /* Navy */
  --c-primary-dark: #12283F;
  --c-accent: #2F80ED;       /* Accent blue */
  --c-accent-dark: #1F63BF;
  --c-text: #1F2933;
  --c-text-sub: #52606D;
  --c-muted: #7B8794;
  --c-line: #E4E7EB;
  --c-bg: #FFFFFF;
  --c-bg-soft: #F5F7FA;
  --c-bg-tint: #EEF4FC;
  --c-todo-bg: #FFF4D6;
  --c-todo-fg: #8A5A00;
  --c-dummy-bg: #FDE2E2;
  --c-dummy-fg: #9B1C1C;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 2px 12px rgba(27, 58, 92, .08);
  --shadow-hover: 0 8px 28px rgba(27, 58, 92, .14);
  --max: 1120px;
  --gutter: 20px;
  --header-h: 64px;
  --font: "Noto Sans JP", -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Hiragino Kaku Gothic ProN", Meiryo, system-ui, sans-serif;
}

/* ---------- reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: calc(var(--header-h) + 16px); }
body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.8;
  color: var(--c-text);
  background: var(--c-bg);
  font-feature-settings: "palt";
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3, h4 { margin: 0; line-height: 1.4; font-weight: 700; letter-spacing: .02em; }
p { margin: 0 0 1em; }
p:last-child { margin-bottom: 0; }
ul, ol { margin: 0; padding: 0; }
a { color: var(--c-accent); text-decoration: none; }
a:hover { text-decoration: underline; }
img, svg { max-width: 100%; height: auto; display: block; }
table { border-collapse: collapse; width: 100%; }
address { font-style: normal; }
button { font: inherit; cursor: pointer; }
:focus-visible { outline: 3px solid var(--c-accent); outline-offset: 3px; border-radius: 4px; }
.visually-hidden { position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }

/* ---------- skip link ---------- */
.skip-link {
  position: absolute; left: 8px; top: -100px; z-index: 1000;
  background: var(--c-primary); color: #fff; padding: 10px 16px; border-radius: var(--radius-sm);
  font-weight: 700;
}
.skip-link:focus { top: 8px; text-decoration: none; }

/* ---------- badges ---------- */
.todo, .dummy {
  display: inline-block; vertical-align: middle;
  font-size: 11px; font-weight: 700; line-height: 1;
  padding: 4px 7px; border-radius: 4px; margin: 0 4px;
  letter-spacing: .04em; white-space: nowrap;
}
.todo { background: var(--c-todo-bg); color: var(--c-todo-fg); border: 1px solid #F0D48A; }
.dummy { background: var(--c-dummy-bg); color: var(--c-dummy-fg); border: 1px solid #F5B5B5; }

/* ---------- layout ---------- */
.container { width: 100%; max-width: var(--max); margin: 0 auto; padding: 0 var(--gutter); }
.container--narrow { max-width: 800px; }
.section { padding: 64px 0; }
.section--soft { background: var(--c-bg-soft); }
.section--tint { background: var(--c-bg-tint); }
.section-title { margin-bottom: 36px; }
.section-title .en {
  display: block; font-size: 12px; font-weight: 700; letter-spacing: .18em; color: var(--c-accent); margin-bottom: 8px;
}
.section-title .ja { font-size: 26px; color: var(--c-primary); }
.section-title--center { text-align: center; }
.section-lead { color: var(--c-text-sub); max-width: 720px; }
.section-title--center + .section-lead { margin: -16px auto 36px; text-align: center; }
.more { text-align: center; margin-top: 36px; }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 48px; padding: 10px 26px; border-radius: 999px;
  font-weight: 700; font-size: 15px; line-height: 1.3;
  border: 2px solid transparent; transition: background .2s, color .2s, transform .15s, box-shadow .2s;
  text-decoration: none;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn--primary { background: var(--c-accent); color: #fff; border-color: var(--c-accent); }
.btn--primary:hover { background: var(--c-accent-dark); border-color: var(--c-accent-dark); }
.btn--navy { background: var(--c-primary); color: #fff; border-color: var(--c-primary); }
.btn--navy:hover { background: var(--c-primary-dark); border-color: var(--c-primary-dark); }
.btn--outline { background: transparent; color: var(--c-primary); border-color: var(--c-primary); }
.btn--outline:hover { background: var(--c-primary); color: #fff; }
.btn--white { background: #fff; color: var(--c-primary); border-color: #fff; }
.btn--white:hover { background: var(--c-bg-tint); }
.btn--ghost { background: transparent; color: #fff; border-color: rgba(255,255,255,.7); }
.btn--ghost:hover { background: rgba(255,255,255,.12); }
.btn--sm { min-height: 40px; padding: 6px 18px; font-size: 14px; }
.btn--block { width: 100%; }
.btn .arrow { font-size: 18px; line-height: 1; }
.ext::after { content: "↗"; font-size: .8em; margin-left: 4px; }

/* ---------- placeholder photo ---------- */
.ph {
  position: relative; display: flex; align-items: center; justify-content: center;
  width: 100%; aspect-ratio: 16 / 9; border-radius: var(--radius); overflow: hidden;
  background: linear-gradient(135deg, #C9D9EC 0%, #E7EEF7 45%, #B7CDE6 100%);
  color: var(--c-primary); font-size: 13px; font-weight: 700; letter-spacing: .08em; text-align: center;
}
.ph::before {
  content: ""; position: absolute; inset: 0;
  background: repeating-linear-gradient(45deg, rgba(255,255,255,.35) 0 10px, transparent 10px 20px);
}
.ph > span { position: relative; padding: 6px 12px; background: rgba(255,255,255,.7); border-radius: 6px; }
.ph--square { aspect-ratio: 1 / 1; }
.ph--wide { aspect-ratio: 21 / 9; }
.ph--map { aspect-ratio: 4 / 3; background: linear-gradient(135deg, #DCE7F3 0%, #F1F5F9 50%, #CFDDEC 100%); }

/* ---------- utility bar: GROUP SITES (desktop only) ---------- */
.util { display: none; background: var(--c-primary); color: #DCE7F3; font-size: 12px; }
.util__inner { display: flex; align-items: center; gap: 18px; min-height: 36px; }
.util__label { font-weight: 700; letter-spacing: .16em; color: #9FB6CF; }
.util__list { list-style: none; display: flex; gap: 4px; margin-left: auto; }
.util__list a { display: inline-block; padding: 6px 12px; color: #E7EEF7; border-radius: 999px; }
.util__list a:hover { background: rgba(255,255,255,.12); text-decoration: none; color: #fff; }
.util__list a:focus-visible { outline-color: #fff; }

/* ---------- header ---------- */
.header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,.94); backdrop-filter: saturate(160%) blur(8px);
  border-bottom: 1px solid var(--c-line);
}
.header__inner { display: flex; align-items: center; justify-content: space-between; min-height: var(--header-h); gap: 16px; }
.logo { display: inline-flex; align-items: center; gap: 10px; color: var(--c-primary); text-decoration: none; }
.logo:hover { text-decoration: none; }
.logo svg { width: 36px; height: 36px; flex: none; }
.logo__text { display: flex; flex-direction: column; line-height: 1.15; }
.logo__ja { font-size: 15px; font-weight: 700; letter-spacing: .04em; }
.logo__en { font-size: 10px; font-weight: 500; letter-spacing: .16em; color: var(--c-text-sub); }
.menu-btn {
  display: inline-flex; flex-direction: column; justify-content: center; gap: 5px;
  width: 44px; height: 44px; padding: 10px; border: 0; border-radius: var(--radius-sm); background: transparent;
}
.menu-btn span { display: block; height: 2px; background: var(--c-primary); border-radius: 2px; transition: transform .25s, opacity .25s; }
.menu-btn[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.menu-btn[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.menu-btn[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
.nav {
  position: absolute; left: 0; right: 0; top: 100%;
  background: #fff; border-bottom: 1px solid var(--c-line); box-shadow: var(--shadow);
  padding: 8px var(--gutter) 20px;
}
.nav { display: none; }
.nav.is-open { display: block; }
.nav__list { list-style: none; display: flex; flex-direction: column; }
.nav__list a { display: block; padding: 12px 4px; color: var(--c-text); font-weight: 500; border-bottom: 1px solid var(--c-line); }
.nav__list a:hover { color: var(--c-accent); text-decoration: none; }
.nav__cta { margin-top: 14px; }
.nav__group { margin-top: 18px; }
.nav__group-label { font-size: 11px; letter-spacing: .14em; color: var(--c-muted); font-weight: 700; margin-bottom: 6px; }
.nav__group a { font-size: 14px; color: var(--c-text-sub); }

/* ---------- breadcrumb ---------- */
.breadcrumb { padding: 14px 0; font-size: 13px; color: var(--c-text-sub); background: var(--c-bg-soft); border-bottom: 1px solid var(--c-line); }
.breadcrumb ol { list-style: none; display: flex; flex-wrap: wrap; gap: 4px 10px; }
.breadcrumb li + li::before { content: "/"; margin-right: 10px; color: var(--c-muted); }
.breadcrumb a { color: var(--c-text-sub); }
.breadcrumb [aria-current="page"] { color: var(--c-primary); font-weight: 700; }

/* ---------- page head (inner pages) ---------- */
.page-hero { padding: 56px 0 40px; background: linear-gradient(180deg, #fff 0%, var(--c-bg-tint) 100%); }
.page-hero .en { display: block; font-size: 12px; letter-spacing: .18em; color: var(--c-accent); font-weight: 700; margin-bottom: 8px; }
.page-hero h1 { font-size: 30px; color: var(--c-primary); }
.page-hero p { color: var(--c-text-sub); margin-top: 12px; max-width: 720px; }

/* ---------- hero ---------- */
.hero { position: relative; overflow: hidden; background: var(--c-primary); color: #fff; }
.hero__bg {
  position: absolute; inset: 0;
  background:
    radial-gradient(1200px 600px at 85% 10%, rgba(47,128,237,.55), transparent 60%),
    radial-gradient(900px 500px at 10% 100%, rgba(255,255,255,.10), transparent 60%),
    linear-gradient(160deg, #1B3A5C 0%, #163049 60%, #12283F 100%);
}
.hero__bg::after {
  content: ""; position: absolute; inset: 0;
  background: repeating-linear-gradient(-45deg, rgba(255,255,255,.035) 0 14px, transparent 14px 28px);
}
.hero__inner { position: relative; padding: 80px 0 64px; }
.hero__eyebrow { font-size: 12px; letter-spacing: .2em; font-weight: 700; color: #BFD7F5; margin-bottom: 18px; }
.hero h1 { font-size: 34px; line-height: 1.35; letter-spacing: .04em; margin-bottom: 20px; }
.hero__lead { font-size: 16px; color: #DCE7F3; max-width: 560px; margin-bottom: 32px; }
.hero__actions { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 44px; }
.hero__stats { list-style: none; display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.hero__stats li { background: rgba(255,255,255,.08); border: 1px solid rgba(255,255,255,.14); border-radius: var(--radius); padding: 14px 16px; }
.hero__stats .num { display: block; font-size: 30px; font-weight: 700; line-height: 1.1; letter-spacing: .02em; }
.hero__stats .num small { font-size: 14px; margin-left: 2px; font-weight: 700; }
.hero__stats .label { display: block; font-size: 12px; color: #BFD7F5; margin-top: 4px; }
.hero__stats .todo { vertical-align: top; margin-left: 6px; }

/* ---------- about ---------- */
.about { display: grid; gap: 32px; }
.about__text p { color: var(--c-text-sub); }
.about__text .lead { font-size: 20px; font-weight: 700; color: var(--c-primary); line-height: 1.6; margin-bottom: 20px; }
.about__areas { list-style: none; display: flex; flex-wrap: wrap; gap: 8px; margin-top: 20px; }
.about__areas li { font-size: 13px; font-weight: 700; color: var(--c-primary); background: var(--c-bg-tint); border-radius: 999px; padding: 6px 14px; }

/* ---------- cards ---------- */
.card-grid { display: grid; gap: 20px; grid-template-columns: 1fr; }
.card {
  background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 24px; display: flex; flex-direction: column; gap: 12px;
  transition: box-shadow .2s, transform .2s;
}
.card:hover { box-shadow: var(--shadow-hover); transform: translateY(-2px); }
.card h3 { font-size: 18px; color: var(--c-primary); }
.card p { color: var(--c-text-sub); font-size: 15px; }
.card .card__foot { margin-top: auto; padding-top: 8px; }
.card .tag { align-self: flex-start; }
.tag {
  display: inline-block; font-size: 11px; font-weight: 700; letter-spacing: .1em; line-height: 1;
  padding: 6px 10px; border-radius: 4px; background: var(--c-bg-tint); color: var(--c-accent);
}
.tag--navy { background: var(--c-primary); color: #fff; }

/* business cards (large) */
.biz-list { display: grid; gap: 28px; }
.biz {
  display: grid; gap: 0; background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius);
  box-shadow: var(--shadow); overflow: hidden; transition: box-shadow .2s, transform .2s;
}
.biz:hover { box-shadow: var(--shadow-hover); transform: translateY(-2px); }
.biz .ph { border-radius: 0; aspect-ratio: 16 / 9; }
.biz__body { padding: 28px 24px 28px; display: flex; flex-direction: column; gap: 14px; }
.biz__num { font-size: 12px; letter-spacing: .2em; font-weight: 700; color: var(--c-accent); }
.biz__body h3 { font-size: 22px; color: var(--c-primary); line-height: 1.4; }
.biz__body h3 small { display: block; font-size: 13px; color: var(--c-text-sub); font-weight: 500; letter-spacing: .06em; margin-top: 4px; }
.biz__body p { color: var(--c-text-sub); }
.biz__points { list-style: none; display: flex; flex-wrap: wrap; gap: 8px; }
.biz__points li { font-size: 13px; background: var(--c-bg-soft); border: 1px solid var(--c-line); border-radius: 999px; padding: 5px 12px; color: var(--c-text); }
.biz__foot { margin-top: auto; padding-top: 6px; display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.biz__url { font-size: 13px; color: var(--c-muted); word-break: break-all; }
.biz--sub { border-style: dashed; box-shadow: none; }
.biz--sub:hover { transform: none; box-shadow: var(--shadow); }
.biz--sub .biz__body { padding: 22px 24px; }
.biz--sub h3 { font-size: 18px; }

/* ---------- news ---------- */
.news-list { list-style: none; border-top: 1px solid var(--c-line); }
.news-list li { border-bottom: 1px solid var(--c-line); }
.news-list a, .news-list .news-item { display: flex; flex-direction: column; gap: 4px; padding: 18px 4px; color: var(--c-text); }
.news-list a:hover { text-decoration: none; background: var(--c-bg-soft); }
.news-list a:hover .news-title { color: var(--c-accent); text-decoration: underline; }
.news-date { font-size: 13px; color: var(--c-muted); font-variant-numeric: tabular-nums; letter-spacing: .04em; }
.news-cat { font-size: 11px; font-weight: 700; color: var(--c-accent); background: var(--c-bg-tint); padding: 3px 8px; border-radius: 4px; line-height: 1; }
.news-meta { display: flex; align-items: center; gap: 10px; }
.news-title { font-weight: 500; }

/* news archive */
.news-archive { list-style: none; display: grid; gap: 16px; }
.news-archive article { background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius); padding: 22px 24px; box-shadow: var(--shadow); }
.news-archive h2 { font-size: 18px; color: var(--c-primary); margin: 8px 0 10px; }
.news-archive p { color: var(--c-text-sub); font-size: 15px; }
.news-archive .news-body { white-space: normal; }

/* ---------- tables ---------- */
.table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }
.table { min-width: 560px; background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius); overflow: hidden; }
.table th, .table td { padding: 16px 18px; text-align: left; vertical-align: top; border-bottom: 1px solid var(--c-line); font-size: 15px; }
.table tr:last-child th, .table tr:last-child td { border-bottom: 0; }
.table th { width: 32%; background: var(--c-bg-soft); color: var(--c-primary); font-weight: 700; white-space: nowrap; }
.table td ul { padding-left: 1.2em; }
.table td ul li { margin-bottom: 4px; }
.table--def th { width: 28%; }
.table td a[href^="tel:"] { color: var(--c-text); font-weight: 700; }

/* ---------- timeline ---------- */
.timeline { list-style: none; position: relative; padding-left: 28px; }
.timeline::before { content: ""; position: absolute; left: 8px; top: 8px; bottom: 8px; width: 2px; background: var(--c-line); }
.timeline li { position: relative; padding: 0 0 28px 12px; }
.timeline li:last-child { padding-bottom: 0; }
.timeline li::before {
  content: ""; position: absolute; left: -26px; top: 8px; width: 14px; height: 14px; border-radius: 50%;
  background: #fff; border: 3px solid var(--c-accent);
}
.timeline li.is-todo::before { border-color: #E0B84A; border-style: dashed; }
.timeline .year { display: block; font-size: 13px; font-weight: 700; letter-spacing: .1em; color: var(--c-accent); font-variant-numeric: tabular-nums; }
.timeline .event { font-size: 16px; color: var(--c-text); }
.timeline .event small { display: block; font-size: 13px; color: var(--c-text-sub); margin-top: 2px; }

/* ---------- recruit ---------- */
.recruit-grid { display: grid; gap: 20px; }
.recruit-card { background: #fff; border-radius: var(--radius); padding: 26px 24px; box-shadow: var(--shadow); border: 1px solid var(--c-line); display: flex; flex-direction: column; gap: 12px; }
.recruit-card h3 { font-size: 18px; color: var(--c-primary); }
.recruit-card ul { list-style: none; display: flex; flex-wrap: wrap; gap: 8px; }
.recruit-card ul li { font-size: 13px; background: var(--c-bg-tint); color: var(--c-primary); border-radius: 999px; padding: 5px 12px; font-weight: 500; }
.recruit-card .card__foot { margin-top: auto; padding-top: 8px; }

/* ---------- cta band ---------- */
.cta-band { background: var(--c-primary); color: #fff; padding: 56px 0; text-align: center; }
.cta-band h2 { font-size: 24px; margin-bottom: 12px; }
.cta-band p { color: #DCE7F3; margin-bottom: 24px; }
.cta-band__actions { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; }
.cta-band .tel { display: inline-block; font-size: 28px; font-weight: 700; color: #fff; letter-spacing: .04em; }
.cta-band .tel:hover { text-decoration: none; }
.cta-band .tel small { display: block; font-size: 13px; font-weight: 400; color: #BFD7F5; letter-spacing: 0; }

/* ---------- office / base cards ---------- */
.base-grid { display: grid; gap: 24px; }
.base { background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
.base .ph { border-radius: 0; }
.base__body { padding: 22px 24px; }
.base__body h3 { font-size: 18px; color: var(--c-primary); margin-bottom: 10px; }
.base__body dl { display: grid; grid-template-columns: 5.5em 1fr; gap: 6px 12px; font-size: 15px; }
.base__body dt { color: var(--c-text-sub); font-weight: 500; }
.base__body dd { margin: 0; }
.base__body dd a[href^="tel:"] { color: var(--c-text); font-weight: 700; }

/* ---------- contact routing ---------- */
.route-grid { display: grid; gap: 18px; }
.route {
  display: flex; flex-direction: column; gap: 10px; padding: 24px; border-radius: var(--radius);
  background: #fff; border: 1px solid var(--c-line); box-shadow: var(--shadow); color: var(--c-text);
  transition: box-shadow .2s, transform .2s;
}
.route:hover { text-decoration: none; box-shadow: var(--shadow-hover); transform: translateY(-2px); }
.route__icon { width: 44px; height: 44px; border-radius: 10px; background: var(--c-bg-tint); color: var(--c-accent); display: inline-flex; align-items: center; justify-content: center; font-weight: 700; font-size: 13px; letter-spacing: .05em; }
.route h3 { font-size: 18px; color: var(--c-primary); }
.route p { color: var(--c-text-sub); font-size: 14px; }
.route .route__link { margin-top: auto; font-weight: 700; color: var(--c-accent); }
.route:hover .route__link { text-decoration: underline; }

.tel-box { background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius); padding: 24px; box-shadow: var(--shadow); display: grid; gap: 18px; }
.tel-box .tel { font-size: 30px; font-weight: 700; color: var(--c-primary); letter-spacing: .04em; line-height: 1.2; }
.tel-box .tel:hover { text-decoration: none; color: var(--c-accent); }
.tel-box .label { font-size: 12px; font-weight: 700; color: var(--c-accent); letter-spacing: .12em; margin-bottom: 4px; }
.tel-box small { display: block; color: var(--c-text-sub); font-size: 13px; }

/* ---------- form ---------- */
.form { background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius); padding: 28px 24px; box-shadow: var(--shadow); }
.form__note { background: var(--c-todo-bg); border: 1px solid #F0D48A; color: var(--c-todo-fg); border-radius: var(--radius-sm); padding: 12px 14px; font-size: 14px; margin-bottom: 24px; }
.field { display: grid; gap: 6px; margin-bottom: 20px; }
.field label, .field .legend { font-weight: 700; font-size: 15px; color: var(--c-primary); }
.req { display: inline-block; font-size: 11px; font-weight: 700; color: #fff; background: #C0392B; border-radius: 4px; padding: 3px 6px; line-height: 1; margin-left: 8px; vertical-align: middle; }
.opt { display: inline-block; font-size: 11px; font-weight: 700; color: var(--c-text-sub); background: var(--c-bg-soft); border-radius: 4px; padding: 3px 6px; line-height: 1; margin-left: 8px; vertical-align: middle; }
.field .hint { font-size: 13px; color: var(--c-text-sub); }
.field input[type="text"], .field input[type="tel"], .field input[type="email"], .field select, .field textarea {
  width: 100%; font: inherit; font-size: 16px; padding: 12px 14px; border: 1px solid #C5CCD3; border-radius: var(--radius-sm); background: #fff; color: var(--c-text);
}
.field textarea { min-height: 160px; resize: vertical; }
.field input:focus, .field select:focus, .field textarea:focus { border-color: var(--c-accent); box-shadow: 0 0 0 3px rgba(47,128,237,.18); outline: none; }
fieldset.field { border: 0; padding: 0; margin: 0 0 20px; }
fieldset.field legend { padding: 0; margin-bottom: 6px; }
.choices { display: flex; flex-wrap: wrap; gap: 8px 18px; }
.choices label { display: inline-flex; align-items: center; gap: 6px; font-weight: 400; color: var(--c-text); font-size: 15px; }
.choices input { width: 18px; height: 18px; accent-color: var(--c-accent); }
.agree { display: flex; align-items: flex-start; gap: 10px; font-size: 15px; margin-bottom: 24px; }
.agree input { width: 18px; height: 18px; margin-top: 4px; accent-color: var(--c-accent); }
.form__actions { display: grid; gap: 10px; }
.btn[disabled], .btn[aria-disabled="true"] { opacity: .55; cursor: not-allowed; transform: none; }

/* ---------- prose (privacy etc.) ---------- */
.prose h2 { font-size: 20px; color: var(--c-primary); margin: 40px 0 12px; padding-left: 14px; border-left: 4px solid var(--c-accent); line-height: 1.5; }
.prose h2:first-child { margin-top: 0; }
.prose p, .prose li { color: var(--c-text); }
.prose ul, .prose ol { padding-left: 1.4em; margin-bottom: 1em; }
.prose li { margin-bottom: 6px; }
.prose .meta { font-size: 14px; color: var(--c-text-sub); }

/* ---------- sitemap page ---------- */
.sitemap-grid { display: grid; gap: 28px; }
.sitemap-group h2 { font-size: 16px; color: var(--c-primary); margin-bottom: 12px; padding-bottom: 8px; border-bottom: 2px solid var(--c-primary); }
.sitemap-group ul { list-style: none; display: grid; gap: 8px; }
.sitemap-group li a { display: inline-block; padding: 4px 0; color: var(--c-text); }
.sitemap-group li a:hover { color: var(--c-accent); }
.sitemap-group .sub { color: var(--c-muted); font-size: 13px; margin-left: 6px; }

/* ---------- footer ---------- */
.footer { background: var(--c-primary-dark); color: #C9D6E4; padding: 56px 0 28px; font-size: 14px; }
.footer a { color: #E7EEF7; }
.footer a:hover { color: #fff; }
.footer__top { display: grid; gap: 36px; }
.footer .logo { color: #fff; }
.footer .logo__en { color: #9FB6CF; }
.footer__addr { margin-top: 16px; line-height: 1.9; }
.footer__addr strong { display: block; color: #fff; font-size: 13px; letter-spacing: .06em; }
.footer__addr a[href^="tel:"] { color: #fff; font-weight: 700; }
.footer__col h2 { font-size: 12px; letter-spacing: .18em; color: #9FB6CF; font-weight: 700; margin-bottom: 14px; }
.footer__col ul { list-style: none; display: grid; gap: 8px; }
.footer__col li small { display: block; color: #9FB6CF; font-size: 12px; }
.footer__sns { display: flex; flex-wrap: wrap; gap: 10px; }
.footer__sns li a { display: inline-flex; align-items: center; gap: 6px; padding: 6px 12px; border: 1px solid rgba(255,255,255,.25); border-radius: 999px; font-size: 13px; }
.footer__sns li a:hover { background: rgba(255,255,255,.08); text-decoration: none; }
.footer__bottom { margin-top: 40px; padding-top: 20px; border-top: 1px solid rgba(255,255,255,.14); display: flex; flex-wrap: wrap; gap: 10px 20px; justify-content: space-between; align-items: center; font-size: 12px; color: #9FB6CF; }
.footer__links { list-style: none; display: flex; flex-wrap: wrap; gap: 6px 18px; }
.footer__links a { color: #C9D6E4; }
.footer .todo { background: rgba(255,244,214,.9); }

/* ==========================================================================
   Breakpoints: 640 / 960
   ========================================================================== */
@media (min-width: 640px) {
  .section { padding: 80px 0; }
  .section-title .ja { font-size: 30px; }
  .hero__inner { padding: 104px 0 88px; }
  .hero h1 { font-size: 44px; }
  .hero__lead { font-size: 17px; }
  .hero__stats { grid-template-columns: repeat(4, 1fr); }
  .card-grid { grid-template-columns: repeat(2, 1fr); }
  .biz { grid-template-columns: 5fr 7fr; }
  .biz .ph { aspect-ratio: auto; height: 100%; min-height: 260px; }
  .biz__body { padding: 36px 32px; }
  .biz--sub { grid-template-columns: 1fr; }
  .news-list a, .news-list .news-item { flex-direction: row; align-items: baseline; gap: 20px; padding: 20px 8px; }
  .news-list .news-meta { flex: none; width: 190px; }
  .recruit-grid { grid-template-columns: repeat(2, 1fr); }
  .base-grid { grid-template-columns: repeat(2, 1fr); }
  .route-grid { grid-template-columns: repeat(2, 1fr); }
  .tel-box { grid-template-columns: 1fr 1fr; }
  .form { padding: 36px; }
  .form__actions { grid-template-columns: 1fr; justify-items: center; }
  .footer__top { grid-template-columns: 1fr 1fr; }
  .sitemap-grid { grid-template-columns: repeat(2, 1fr); }
  .page-hero { padding: 72px 0 48px; }
  .page-hero h1 { font-size: 36px; }
}

@media (min-width: 960px) {
  :root { --gutter: 32px; --header-h: 112px; }
  .util { display: block; }
  .section { padding: 104px 0; }
  .section-title .ja { font-size: 34px; }
  .menu-btn { display: none; }
  .nav { position: static; display: block; background: transparent; border: 0; box-shadow: none; padding: 0; }
  .nav__list { flex-direction: row; align-items: center; gap: 4px; }
  .nav__list a { padding: 8px 14px; border: 0; font-size: 15px; border-radius: 999px; }
  .nav__list a:hover { background: var(--c-bg-tint); color: var(--c-primary); }
  .nav__cta { margin: 0 0 0 10px; }
  .nav__cta .btn { min-height: 42px; padding: 6px 22px; font-size: 14px; }
  .nav__group { display: none; }
  .nav__list { display: flex; }
  .nav__list li.nav__cta { list-style: none; }
  .hero__inner { padding: 136px 0 112px; }
  .hero h1 { font-size: 54px; }
  .hero__lead { font-size: 18px; max-width: 640px; }
  .hero__stats li { padding: 18px 20px; }
  .hero__stats .num { font-size: 36px; }
  .about { grid-template-columns: 6fr 5fr; align-items: center; gap: 56px; }
  .about__text .lead { font-size: 24px; }
  .card-grid--3 { grid-template-columns: repeat(3, 1fr); }
  .biz { grid-template-columns: 1fr 1fr; }
  .biz__body { padding: 48px 44px; }
  .biz__body h3 { font-size: 26px; }
  .news-list a, .news-list .news-item { padding: 22px 12px; }
  .table th, .table td { padding: 18px 24px; }
  .table th { width: 26%; }
  .timeline { padding-left: 0; }
  .timeline::before { left: 128px; }
  .timeline li { display: grid; grid-template-columns: 120px 1fr; gap: 24px; padding: 0 0 32px 0; }
  .timeline li::before { left: 122px; top: 8px; }
  .timeline .year { text-align: right; font-size: 15px; padding-top: 2px; }
  .timeline .event { padding-left: 32px; }
  .recruit-grid { gap: 28px; }
  .cta-band { padding: 80px 0; }
  .cta-band h2 { font-size: 30px; }
  .route-grid { grid-template-columns: repeat(4, 1fr); }
  .footer__top { grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 40px; }
  .sitemap-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; }
}

/* ---------- small utilities (no inline styles: CSP style-src 'self') ---------- */
.section-lead--foot { margin-top: 32px; font-size: 14px; }
.meta--foot { margin-top: 40px; }

/* ---------- form mock notice (#36, R2-9) ---------- */
.form__notice { min-height: 1.5em; margin: 6px 0 0; font-weight: 700; color: var(--c-todo-fg); text-align: center; }
.form__notice:empty { display: none; }
.form__notice.is-shown { background: var(--c-todo-bg); border: 1px solid #F0D48A; border-radius: var(--radius-sm); padding: 12px 14px; }

/* ---------- privacy: 全角数字の番号リスト ---------- */
.list-jp { list-style: none; padding-left: 1em; }
.list-jp li { text-indent: -2em; padding-left: 2em; }

/* ---------- definition tables stack on small screens (#29) ---------- */
@media (max-width: 639.98px) {
  .table--def { min-width: 0; }
  .table--def tr, .table--def th, .table--def td { display: block; width: 100%; }
  .table--def th { border-bottom: 0; padding: 12px 16px 4px; font-size: 13px; letter-spacing: .04em; }
  .table--def td { padding: 4px 16px 14px; }
  .table--def tr { border-bottom: 1px solid var(--c-line); }
  .table--def tr:last-child { border-bottom: 0; }
  .table--def tr:last-child th, .table--def tr:last-child td { border-bottom: 0; }
}

/* ---------- 404 page: cards as links ---------- */
a.card { color: inherit; }
a.card:hover { text-decoration: none; }
a.card:hover h3 { color: var(--c-accent); }