@charset "utf-8";
/* =========================================================
   株式会社大谷電気 コーポレートサイト
   Design tokens & shared components
   ========================================================= */

:root {
  --navy:        #16233f;
  --navy-2:      #1d2e4d;
  --navy-line:   #33456a;
  --cream:       #f4f0e8;
  --cream-2:     #efe9dd;
  --gold:        #c8a24a;
  --gold-soft:   #d8b968;
  --ink:         #2b2b2b;
  --ink-soft:    #55565a;
  --white:       #ffffff;
  --line:        #cdc6b6;

  --serif: "Noto Serif JP", "Yu Mincho", "Hiragino Mincho ProN", serif;
  --sans:  "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;

  --container: 1120px;
  --pad: clamp(20px, 5vw, 48px);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--sans);
  color: var(--ink);
  background: var(--cream);
  line-height: 1.9;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
  letter-spacing: .02em;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }

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

/* ---------- Typographic helpers ---------- */
.eyebrow {
  font-size: 11px;
  letter-spacing: .32em;
  font-weight: 500;
  color: var(--ink-soft);
  display: flex;
  align-items: center;
  gap: .7em;
  margin: 0 0 18px;
  text-transform: uppercase;
}
.eyebrow::before {
  content: "";
  width: 26px; height: 1px;
  background: var(--gold);
  display: inline-block;
}
.eyebrow.on-navy { color: rgba(255,255,255,.72); }
.eyebrow.gold    { color: var(--gold); }

.serif { font-family: var(--serif); }
.gold  { color: var(--gold); }

h1,h2,h3,h4 { font-weight: 500; margin: 0; }

.sec-title {
  font-family: var(--serif);
  font-size: clamp(24px, 3.4vw, 38px);
  line-height: 1.45;
  color: var(--navy);
  font-weight: 600;
  letter-spacing: .04em;
}
.sec-title.on-navy { color: #fff; }

.lead {
  color: var(--ink-soft);
  font-size: 14.5px;
  line-height: 2.05;
}

/* ---------- Arrow link button ---------- */
.arrow-link {
  display: inline-flex;
  align-items: center;
  gap: .5em;
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--navy);
  font-weight: 500;
}
.arrow-link::before { content: "▶"; font-size: 9px; color: var(--gold); }
.arrow-link.on-navy { color: #fff; }
.arrow-link:hover { color: var(--gold); }

/* ---------- Section rhythm ---------- */
.section { padding-block: clamp(56px, 8vw, 104px); }
.section.navy { background: var(--navy); color: #fff; }
.section.cream2 { background: var(--cream-2); }

.divider { height: 1px; background: var(--line); border: 0; margin: 0; }

/* =========================================================
   HEADER
   ========================================================= */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(244,240,232,.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.site-header .inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 66px;
}
.brand { display: flex; flex-direction: column; line-height: 1.25; }
.brand b {
  font-family: var(--serif); font-size: 18px; font-weight: 600;
  color: var(--navy); letter-spacing: .06em;
}
.brand span { font-size: 10px; letter-spacing: .28em; color: var(--ink-soft); }
.nav { display: flex; align-items: center; gap: 26px; }
.nav a { font-size: 13px; letter-spacing: .06em; color: var(--navy); }
.nav a:hover { color: var(--gold); }
.nav .nav-cta {
  background: var(--navy); color: #fff; padding: 10px 18px;
  font-size: 12px; letter-spacing: .1em; border-radius: 2px;
}
.nav .nav-cta:hover { background: var(--gold); color: #fff; }
.nav-toggle { display: none; }

/* =========================================================
   HERO
   ========================================================= */
.hero { position: relative; }
.hero-media { position: relative; height: clamp(360px, 52vw, 560px); overflow: hidden; }
.hero-media img { width: 100%; height: 100%; object-fit: cover; object-position: center 30%; }
.hero-media::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(100deg, rgba(10,18,36,.62) 0%, rgba(10,18,36,.28) 45%, rgba(10,18,36,0) 70%);
}
.hero-copy {
  position: absolute; inset: 0; z-index: 2;
  display: flex; flex-direction: column; justify-content: center;
}
.hero-copy .container { width: 100%; }
.hero-eyebrow {
  color: #fff; font-size: 12px; letter-spacing: .5em; margin: 0 0 22px;
}
.hero-title {
  font-family: var(--serif); color: #fff; font-weight: 600;
  font-size: clamp(30px, 5.4vw, 62px); line-height: 1.4; letter-spacing: .06em;
  text-shadow: 0 2px 18px rgba(0,0,0,.3);
}
.hero-title .mark { font-size: .82em; }

/* Intro under hero */
.intro { text-align: center; padding-block: clamp(48px, 7vw, 86px); }
.intro h2 {
  font-family: var(--serif); font-weight: 600; color: var(--navy);
  font-size: clamp(22px, 3.6vw, 40px); letter-spacing: .06em; line-height: 1.5;
}
.intro p { margin: 26px 0 0; color: var(--ink-soft); font-size: 15px; line-height: 2.1; }
.intro .strong { color: var(--ink); font-weight: 500; }

/* =========================================================
   CATEGORY CARDS (4)
   ========================================================= */
.cats { padding-bottom: clamp(48px, 7vw, 80px); }
.cats-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px;
}
.cat-card {
  background: var(--navy); color: #fff; padding: 30px 24px 26px;
  display: flex; flex-direction: column; min-height: 220px;
  border: 1px solid var(--navy-line);
  transition: transform .25s ease, background .25s ease;
}
.cat-card:hover { transform: translateY(-4px); background: var(--navy-2); }
.cat-card .cat-no {
  font-size: 11px; letter-spacing: .18em; color: rgba(255,255,255,.6);
  margin-bottom: 18px;
}
.cat-card .cat-no b { color: var(--gold); font-weight: 500; margin-left: .4em; }
.cat-card h3 {
  font-family: var(--serif); font-size: 22px; font-weight: 600; letter-spacing: .04em;
}
.cat-card p { font-size: 12.5px; color: rgba(255,255,255,.72); margin: 12px 0 0; line-height: 1.85; }
.cat-card .arrow-link { margin-top: auto; padding-top: 22px; }

/* =========================================================
   困った LIST
   ========================================================= */
.troubles { }
.troubles-head { display: flex; flex-wrap: wrap; align-items: baseline; gap: 14px 20px; margin-bottom: 10px; }
.troubles-head h2 {
  font-family: var(--serif); color: var(--navy); font-size: clamp(20px, 2.8vw, 30px);
  font-weight: 600; letter-spacing: .04em;
}
.troubles-head h2 .hl {
  background: linear-gradient(transparent 62%, rgba(200,162,74,.4) 62%);
  padding: 0 .1em;
}
.troubles-head .note { font-size: 13px; color: var(--ink-soft); }
.troubles-sub { font-size: 13px; color: var(--ink-soft); margin: 0 0 28px; }
.troubles-grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  column-gap: 40px; row-gap: 20px;
  border-top: 1px solid var(--line); padding-top: 30px;
}
.trouble {
  display: flex; gap: 14px; align-items: flex-start;
  font-size: 14px; color: var(--ink);
}
.trouble .n { color: var(--gold); font-size: 12px; font-weight: 600; letter-spacing: .1em; padding-top: .35em; min-width: 20px; }
.trouble.full { grid-column: 1 / -1; }

/* =========================================================
   NUMBERED FEATURE CARDS (4 / 5)
   ========================================================= */
.feature-head { margin-bottom: 40px; }
.feature-head .row { display: flex; flex-wrap: wrap; align-items: baseline; gap: 8px 18px; }
.feature-head h2 {
  font-family: var(--serif); color: var(--navy); font-size: clamp(22px, 3vw, 32px); font-weight: 600;
}
.feature-head.on-navy h2 { color: #fff; }
.feature-head .sub { font-size: 13.5px; color: var(--ink-soft); }
.feature-head.on-navy .sub { color: rgba(255,255,255,.7); }

.feature-grid { display: grid; gap: 0; }
.feature-grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
.feature-grid.cols-4 { grid-template-columns: repeat(4, 1fr); }
.feature-grid.cols-5 { grid-template-columns: repeat(5, 1fr); }

/* Promise cards (bordered, one filled) */
.promise-card { border: 1px solid var(--line); background: #fff; padding: 22px 22px 24px; }
.promise-card .fno {
  font-family: var(--serif); font-size: 34px; color: var(--gold); font-weight: 600;
  line-height: 1; margin-bottom: 14px; display: block;
}
.promise-card h4 { font-size: 15px; color: var(--navy); font-weight: 600; margin-bottom: 10px; }
.promise-card p { font-size: 12.5px; color: var(--ink-soft); line-height: 1.85; margin: 0; }
.promise-card.filled { background: var(--navy); border-color: var(--navy); }
.promise-card.filled h4 { color: #fff; }
.promise-card.filled p { color: rgba(255,255,255,.7); }
.feature {
  padding: 6px 26px 6px 0;
  border-left: 1px solid var(--line);
  padding-left: 26px;
}
.feature:first-child { border-left: 0; padding-left: 0; }
.on-navy .feature { border-color: var(--navy-line); }
.feature .fno {
  font-family: var(--serif); font-size: 30px; color: var(--gold); font-weight: 600;
  line-height: 1; margin-bottom: 16px; display: block;
}
.feature h4 {
  font-size: 15px; color: var(--navy); line-height: 1.6; margin-bottom: 12px; font-weight: 600;
}
.on-navy .feature h4 { color: #fff; }
.feature p { font-size: 12.5px; color: var(--ink-soft); line-height: 1.9; margin: 0; }
.on-navy .feature p { color: rgba(255,255,255,.66); }

/* =========================================================
   SPLIT (image + text)
   ========================================================= */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(28px, 5vw, 64px); align-items: center; }
.split.narrow-media { grid-template-columns: 0.85fr 1.15fr; }
.split-media img { width: 100%; height: 100%; max-height: 420px; object-fit: cover; }
.split-media .cap {
  display: inline-block; background: var(--navy); color: #fff;
  font-size: 11px; letter-spacing: .06em; padding: 6px 12px; margin-top: -34px; position: relative; z-index:2;
}

/* At-a-glance / promise box */
.glance { background: #fff; color: var(--navy); padding: 34px 32px; }
.glance .eyebrow { color: var(--ink-soft); }
.glance h3 { font-family: var(--serif); font-size: 24px; font-weight: 600; line-height: 1.5; margin-bottom: 22px; }
.glance-badges { display: flex; gap: 30px; margin-bottom: 20px; }
.glance-badges .b { text-align: center; }
.glance-badges .b b { font-family: var(--serif); font-size: 30px; color: var(--navy); display:block; }
.glance-badges .b span { font-size: 11px; color: var(--ink-soft); }
.glance > p { font-size: 12.5px; color: var(--ink-soft); margin: 0; }

/* tag list e.g. 照明／配線／… */
.tag-line { font-size: clamp(15px, 2vw, 20px); color: var(--navy); letter-spacing: .05em; font-weight: 500; }
.tag-line .gold { color: var(--gold); }

/* =========================================================
   TYPE CARDS (工事領域) — bordered navy cards row
   ========================================================= */
.type-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; }
.type-card {
  border: 1px solid var(--navy-line); padding: 22px 18px 24px; min-height: 180px;
  background: transparent;
}
.section.navy .type-card { background: rgba(255,255,255,.02); }
.type-card.filled { background: var(--navy-2); }
.type-card .tno { font-size: 10px; letter-spacing: .18em; color: var(--gold); margin-bottom: 14px; }
.type-card h4 { font-family: var(--serif); font-size: 17px; color: #fff; font-weight: 600; margin-bottom: 12px; }
.type-card p { font-size: 12px; color: rgba(255,255,255,.66); line-height: 1.85; margin: 0; }
.type-card p .hl { color: var(--gold-soft); }

/* Spec card (工事領域 TYPE cards) on light bg */
.spec-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; }
.spec-card { border: 1px solid var(--line); background: #fff; padding: 22px 18px 24px; min-height: 190px; }
.spec-card .tno { font-size: 10px; letter-spacing: .18em; color: var(--gold); margin-bottom: 14px; font-weight: 600; }
.spec-card h4 { font-family: var(--serif); font-size: 17px; color: var(--navy); font-weight: 600; margin-bottom: 12px; }
.spec-card p { font-size: 12px; color: var(--ink-soft); line-height: 1.85; margin: 0; }
.spec-card p .hl { color: var(--gold); }
.spec-card.filled { background: var(--navy); border-color: var(--navy); }
.spec-card.filled h4 { color: #fff; }
.spec-card.filled p { color: rgba(255,255,255,.7); }
.spec-card.filled p .hl { color: var(--gold-soft); }

/* Reason cards (選ばれる理由) — numbered, bordered, one filled */
.reason-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; }
.reason-card { border: 1px solid var(--line); background: #fff; padding: 22px 18px 24px; min-height: 200px; }
.reason-card .rno { font-family: var(--serif); font-size: 30px; color: var(--gold); font-weight: 600; line-height: 1; margin-bottom: 14px; display: block; }
.reason-card h4 { font-size: 14.5px; color: var(--navy); font-weight: 600; line-height: 1.6; margin-bottom: 12px; }
.reason-card p { font-size: 12px; color: var(--ink-soft); line-height: 1.85; margin: 0; }
.reason-card.filled { background: var(--navy); border-color: var(--navy); }
.reason-card.filled h4 { color: #fff; }
.reason-card.filled p { color: rgba(255,255,255,.7); }
.reason-card.filled p .hl { color: var(--gold-soft); }

/* =========================================================
   CHALLENGE (2 photos)
   ========================================================= */
.photo-pair { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.photo-pair figure { position: relative; margin: 0; }
.photo-pair img { width: 100%; height: 240px; object-fit: cover; }
.photo-pair figcaption {
  position: absolute; left: 12px; bottom: 12px;
  background: rgba(22,35,63,.85); color: #fff; font-size: 11px; padding: 5px 12px; letter-spacing: .04em;
}

/* mini tags (challenge voices) */
.mini-tags { display: grid; grid-template-columns: 1fr 1fr; gap: 12px 28px; margin-top: 28px; }
.mini-tags span { font-size: 13.5px; color: var(--ink); }

/* =========================================================
   RECRUIT / PARTNER PANELS
   ========================================================= */
.rp-head { display: flex; flex-wrap: wrap; align-items: baseline; gap: 6px 16px; margin-bottom: 40px; }
.rp-head h2 { font-family: var(--serif); color: var(--navy); font-size: clamp(22px, 3vw, 30px); font-weight: 600; }
.rp-head h2 .sep { color: var(--gold); margin: 0 .35em; font-weight: 400; }
.rp-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }
.rp-card { border: 1px solid var(--line); background: #fff; }
.rp-card .banner {
  display: flex; align-items: center; gap: 18px;
  padding: 26px 28px; background: linear-gradient(90deg, #e9e3d6, #f2ece0);
}
.rp-card .banner .avatar {
  width: 58px; height: 58px; border-radius: 50%; flex: none;
  display: grid; place-items: center; font-size: 11px; color: #fff;
}
.rp-card .banner .avatar.navy { background: var(--navy); }
.rp-card .banner .avatar.light { background: #fff; border: 1px solid var(--line); }
.rp-card .banner .b-label { font-size: 10px; letter-spacing: .2em; color: var(--ink-soft); margin-bottom: 6px; }
.rp-card .banner h3 { font-family: var(--serif); font-size: 21px; color: var(--navy); font-weight: 600; }
.rp-card .body { padding: 28px; }
.rp-card .body .k { font-size: 11px; letter-spacing: .2em; color: var(--gold); margin-bottom: 12px; }
.rp-card .body h4 { font-family: var(--serif); font-size: 20px; color: var(--navy); font-weight: 600; margin-bottom: 16px; }
.rp-card .body p { font-size: 12.5px; color: var(--ink-soft); line-height: 1.9; margin: 0 0 22px; }
.rp-card .body .callout {
  background: var(--navy); color: #fff; font-size: 12px; line-height: 1.9;
  padding: 16px 18px; margin-bottom: 22px;
}
.rp-card .body .callout .gold { color: var(--gold-soft); }
.btn {
  display: inline-flex; align-items: center; gap: .6em;
  border: 1px solid var(--navy); color: var(--navy);
  padding: 12px 26px; font-size: 13px; letter-spacing: .08em;
  transition: .2s;
}
.btn:hover { background: var(--navy); color: #fff; }
.btn.solid { background: var(--navy); color: #fff; }
.btn.solid:hover { background: var(--gold); border-color: var(--gold); }
.rp-card .body .foot { display: flex; align-items: center; gap: 18px; flex-wrap: wrap; }
.rp-card .body .foot .fnote { font-size: 11px; color: var(--ink-soft); }

/* =========================================================
   FOOTER CONTACT
   ========================================================= */
.foot-contact { border-top: 1px solid var(--line); }
.fc-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; padding-block: 54px; }
.fc-col { border-left: 1px solid var(--line); padding-left: 26px; }
.fc-col:first-child { border-left: 0; padding-left: 0; }
.fc-col .k { font-size: 10px; letter-spacing: .22em; color: var(--ink-soft); margin-bottom: 12px; }
.fc-col .k .sep { color: var(--gold); margin: 0 .4em; }
.fc-col .v { font-family: var(--serif); font-size: clamp(22px, 2.6vw, 28px); color: var(--navy); font-weight: 600; letter-spacing: .04em; }
.fc-col .v a:hover { color: var(--gold); }
.fc-col .s { font-size: 11.5px; color: var(--ink-soft); margin-top: 8px; }
.fc-col .s .gold { color: var(--gold); }

.site-footer { background: var(--navy); color: rgba(255,255,255,.7); }
.site-footer .inner { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 16px; padding-block: 26px; align-items: center; }
.site-footer .brand b { color: #fff; }
.site-footer .brand span { color: rgba(255,255,255,.5); }
.site-footer .copy { font-size: 11px; letter-spacing: .08em; }

/* =========================================================
   PAGE HERO (sub pages)
   ========================================================= */
.page-hero { background: var(--navy); color: #fff; padding-block: clamp(60px, 9vw, 110px); }
.page-hero .eyebrow { color: rgba(255,255,255,.7); }
.page-hero h1 {
  font-family: var(--serif); font-size: clamp(28px, 4.6vw, 50px); font-weight: 600;
  line-height: 1.5; letter-spacing: .05em;
}
.page-hero p { color: rgba(255,255,255,.72); margin-top: 22px; max-width: 640px; }

/* Breadcrumb */
.crumbs { font-size: 11px; color: var(--ink-soft); padding-block: 16px; letter-spacing: .06em; }
.crumbs a:hover { color: var(--gold); }
.crumbs .sep { margin: 0 .6em; color: var(--line); }

/* =========================================================
   CONTACT FORM
   ========================================================= */
.form-wrap { max-width: 720px; margin-inline: auto; }
.form-row { margin-bottom: 22px; }
.form-row label { display: block; font-size: 13px; font-weight: 600; color: var(--navy); margin-bottom: 8px; }
.form-row label .req { color: #b5462f; font-size: 11px; margin-left: .5em; }
.form-row input, .form-row select, .form-row textarea {
  width: 100%; font-family: var(--sans); font-size: 15px; color: var(--ink);
  border: 1px solid var(--line); background: #fff; padding: 13px 15px; border-radius: 2px;
}
.form-row textarea { min-height: 160px; resize: vertical; }
.form-row .hint { font-size: 12px; color: var(--ink-soft); margin: 6px 0 0; }

/* 内容別ラジオ選択 */
.radio-group { display: flex; flex-wrap: wrap; gap: 12px; }
.radio-group label {
  display: flex; align-items: center; gap: 9px; margin: 0;
  border: 1px solid var(--line); background: #fff; border-radius: 2px;
  padding: 13px 20px; cursor: pointer; font-size: 14px; font-weight: 500; color: var(--ink);
  transition: .18s;
}
.radio-group input { accent-color: var(--navy); width: 16px; height: 16px; }
.radio-group label:hover { border-color: var(--gold); }
.radio-group label:has(input:checked) { border-color: var(--gold); background: #fbf7ee; color: var(--navy); }
.form-row input:focus, .form-row select:focus, .form-row textarea:focus {
  outline: none; border-color: var(--gold); box-shadow: 0 0 0 3px rgba(200,162,74,.15);
}
.form-actions { text-align: center; margin-top: 34px; }
.form-actions .btn { padding: 15px 54px; font-size: 15px; cursor: pointer; }
.form-note { font-size: 12px; color: var(--ink-soft); text-align: center; margin-top: 16px; }
.alert { padding: 16px 20px; border-radius: 3px; margin-bottom: 28px; font-size: 14px; }
.alert.ok { background: #e8f1e8; border: 1px solid #9cc39c; color: #2f5d2f; }
.alert.ng { background: #f6e7e3; border: 1px solid #d0a99f; color: #8a3b28; }

/* =========================================================
   RESPONSIVE
   ========================================================= */
@media (max-width: 960px) {
  .cats-grid { grid-template-columns: repeat(2, 1fr); }
  .troubles-grid { grid-template-columns: repeat(2, 1fr); }
  .feature-grid.cols-4, .feature-grid.cols-5 { grid-template-columns: repeat(2, 1fr); row-gap: 30px; }
  .feature { border-left: 0 !important; padding-left: 0 !important; border-top: 1px solid var(--line); padding-top: 22px; }
  .on-navy .feature { border-top-color: var(--navy-line); }
  .type-grid { grid-template-columns: repeat(2, 1fr); }
  .split, .split.narrow-media { grid-template-columns: 1fr; }
  .rp-grid { grid-template-columns: 1fr; }
  .fc-grid { grid-template-columns: 1fr; }
  .fc-col { border-left: 0; padding-left: 0; border-top: 1px solid var(--line); padding-top: 22px; }
  .fc-col:first-child { border-top: 0; padding-top: 0; }
}
@media (max-width: 640px) {
  .nav { position: fixed; inset: 66px 0 auto 0; background: var(--cream); flex-direction: column; gap: 0;
         border-bottom: 1px solid var(--line); transform: translateY(-120%); transition: transform .3s; padding: 8px 0; }
  .nav.open { transform: translateY(0); }
  .nav a { width: 100%; padding: 14px var(--pad); border-top: 1px solid var(--line); }
  .nav .nav-cta { margin: 10px var(--pad); text-align: center; }
  .nav-toggle { display: flex; flex-direction: column; gap: 5px; background: none; border: 0; cursor: pointer; padding: 8px; }
  .nav-toggle span { width: 24px; height: 2px; background: var(--navy); display: block; }
  .cats-grid { grid-template-columns: 1fr; }
  .troubles-grid { grid-template-columns: 1fr; }
  .feature-grid.cols-4, .feature-grid.cols-5 { grid-template-columns: 1fr; }
  .type-grid { grid-template-columns: 1fr; }
  .photo-pair { grid-template-columns: 1fr; }
}