/* ===================================================================
   株式会社 第一技研 — Corporate Site
   Palette: ink navy / paper white / restrained bronze
   =================================================================== */

:root {
  --ink:      #15202e;   /* 主役：ディープインクネイビー */
  --ink-2:    #1d2b3c;
  --paper:    #ffffff;
  --tint:     #f5f3ef;   /* 温かみのある紙白 */
  --line:     #e3ddd3;
  --text:     #25303c;
  --muted:    #5d6b78;
  --muted-d:  #93a0ab;   /* ダーク背景上の控えめテキスト */
  --bronze:   #9a7b4f;   /* 差し色：抑えたブロンズ */
  --bronze-l: #b89b71;
  --maxw:     1140px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: "Noto Sans JP", system-ui, sans-serif;
  color: var(--text);
  background: #0e1620; /* 固定モーションの基調色（明るい面は各セクションで上塗り） */
  line-height: 1.85;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img { max-width: 100%; display: block; }

a { color: inherit; text-decoration: none; }

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 28px; }

.pc-only { display: inline; }

/* ===================== Header ===================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid var(--line);
}
.header-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 28px;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand-logo { height: 26px; width: auto; }
.brand-text {
  font-family: "Noto Serif JP", serif;
  font-weight: 600;
  font-size: 1.02rem;
  letter-spacing: 0.04em;
  color: var(--ink);
}
.site-nav { display: flex; align-items: center; gap: 30px; }
.site-nav a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text);
  letter-spacing: 0.02em;
  transition: color 0.2s;
}
.site-nav a:hover { color: var(--bronze); }
.nav-cta {
  border: 1px solid var(--ink);
  border-radius: 2px;
  padding: 9px 18px;
  color: var(--ink) !important;
  transition: background 0.2s, color 0.2s !important;
}
.nav-cta:hover { background: var(--ink); color: #fff !important; }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: 0;
  cursor: pointer;
  padding: 8px;
}
.nav-toggle span {
  width: 24px; height: 2px;
  background: var(--ink);
  transition: 0.25s;
}

/* ===================== 上場グループ帯（最上部） ===================== */
.topband {
  position: relative;
  z-index: 1;
  background: var(--tint);
  border-bottom: 1px solid var(--line);
}
.topband-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 11px 28px;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 16px;
  flex-wrap: wrap;
}
.topband-text {
  margin: 0;
  font-size: 0.8rem;
  letter-spacing: 0.02em;
  color: var(--muted);
  line-height: 1.6;
  text-align: right;
}
.topband-text strong { font-weight: 500; color: var(--text); }
.topband-marks { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.topband-marks .listing-mark { height: 36px; width: auto; display: block; }
@media (max-width: 680px) {
  .topband-inner { padding: 10px 20px; gap: 10px; justify-content: flex-end; }
  .topband-text { font-size: 0.72rem; }
  .topband-marks .listing-mark { height: 30px; }
}

/* ===================== Hero ===================== */
.hero {
  color: #fff;
  position: relative;
  overflow: hidden;
  padding: 96px 28px 0;
}
/* 固定背景モーション（外装改修ストーリー）：ページ全体に固定 */
.site-motion {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
  pointer-events: none;
  z-index: 0;
}
/* コンテンツはモーションより上に明示（負のz-indexは合成バグを踏むため不使用） */
.hero, .section, .site-footer { position: relative; z-index: 1; }
/* 文字の可読性を守るスクリム（左を濃く、右へ抜ける） */
.hero-scrim {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background:
    linear-gradient(90deg,
      rgba(14, 22, 32, 0.93) 0%,
      rgba(14, 22, 32, 0.72) 38%,
      rgba(14, 22, 32, 0.22) 66%,
      rgba(14, 22, 32, 0.38) 100%),
    linear-gradient(180deg, rgba(14, 22, 32, 0.35) 0%, transparent 22%, transparent 70%, rgba(14, 22, 32, 0.55) 100%);
}
.hero::before {
  /* 微かな対角グラデーションで奥行き */
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    radial-gradient(120% 90% at 85% 8%, rgba(154, 123, 79, 0.16), transparent 55%),
    linear-gradient(180deg, #18253500 0%, #101924 100%);
  pointer-events: none;
  opacity: .55;
}
.hero-inner, .hero-meta { position: relative; z-index: 2; }
.hero-inner {
  position: relative;
  max-width: var(--maxw);
  margin: 0 auto;
  padding-bottom: 64px;
}
.hero-eyebrow {
  font-size: 0.78rem;
  letter-spacing: 0.22em;
  color: var(--bronze-l);
  margin: 0 0 28px;
  font-weight: 500;
}
.hero-title {
  font-family: "Noto Serif JP", serif;
  font-weight: 600;
  font-size: clamp(2.1rem, 5.4vw, 3.65rem);
  line-height: 1.32;
  letter-spacing: 0.02em;
  margin: 0 0 30px;
}
.hero-title-em { color: #fff; position: relative; }
.hero-lead {
  font-family: "Noto Serif JP", serif;
  font-size: clamp(1.05rem, 2.3vw, 1.4rem);
  letter-spacing: 0.06em;
  color: #eef1f4;
  margin: 0 0 22px;
}
.hero-desc {
  color: var(--muted-d);
  font-size: 0.98rem;
  line-height: 2;
  max-width: 720px;
  margin: 0 0 40px;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 16px; }

.btn {
  display: inline-block;
  padding: 15px 30px;
  font-weight: 500;
  font-size: 0.95rem;
  letter-spacing: 0.04em;
  border-radius: 2px;
  transition: 0.22s;
}
.btn-primary { background: var(--bronze); color: #fff; }
.btn-primary:hover { background: var(--bronze-l); transform: translateY(-1px); }
.btn-ghost { border: 1px solid rgba(255, 255, 255, 0.4); color: #fff; }
.btn-ghost:hover { border-color: #fff; background: rgba(255, 255, 255, 0.08); }

.hero-meta {
  position: relative;
  max-width: var(--maxw);
  margin: 0 auto;
  border-top: 1px solid rgba(255, 255, 255, 0.14);
  padding: 30px 0 42px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 20px;
}
.hero-anniv { display: flex; align-items: baseline; gap: 14px; }
.hero-anniv-num {
  font-family: "Noto Serif JP", serif;
  font-weight: 700;
  font-size: 3.6rem;
  line-height: 1;
  color: #fff;
}
.hero-anniv-label {
  font-size: 0.82rem;
  letter-spacing: 0.2em;
  color: var(--bronze-l);
  line-height: 1.5;
}
.hero-anniv-label small { color: var(--muted-d); letter-spacing: 0.08em; }
.hero-license {
  font-size: 0.82rem;
  color: var(--muted-d);
  text-align: right;
  line-height: 1.9;
  margin: 0;
}

/* ===================== Section base ===================== */
.section { padding: 96px 0; background: var(--paper); }
.section-tint { background: var(--tint); }
/* ダーク面：固定モーションが透けて見える */
.section-dark { background: rgba(14, 22, 32, 0.5); color: #fff; }

.sec-head {
  display: flex;
  align-items: flex-start;
  gap: 24px;
  margin-bottom: 56px;
}
.sec-num {
  font-family: "Noto Serif JP", serif;
  font-weight: 700;
  font-size: 2rem;
  color: var(--bronze);
  line-height: 1;
  padding-top: 4px;
}
.sec-eyebrow {
  font-size: 0.74rem;
  letter-spacing: 0.2em;
  color: var(--bronze);
  font-weight: 500;
  margin: 0 0 12px;
}
.sec-title {
  font-family: "Noto Serif JP", serif;
  font-weight: 600;
  font-size: clamp(1.5rem, 3.4vw, 2.1rem);
  line-height: 1.5;
  letter-spacing: 0.02em;
  margin: 0;
  color: var(--ink);
}
.sec-head-light .sec-eyebrow { color: var(--bronze-l); }
.sec-head-light .sec-title { color: #fff; }

/* ===================== About ===================== */
.about-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.3fr;
  gap: 56px;
  align-items: start;
}
.about-statement {
  font-family: "Noto Serif JP", serif;
  font-weight: 600;
  font-size: clamp(1.4rem, 3vw, 1.95rem);
  line-height: 1.7;
  letter-spacing: 0.03em;
  color: var(--ink);
  margin: 0;
}
.about-body p { margin: 0 0 22px; color: var(--text); }
.about-body p:last-child { margin-bottom: 0; }

/* ===================== Cards ===================== */
.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.card-grid-3 { grid-template-columns: repeat(3, 1fr); }
.card {
  background: var(--paper);
  padding: 38px 32px;
  transition: transform 0.2s;
}
.section-tint .card { background: var(--tint); }
.card-num {
  font-family: "Noto Serif JP", serif;
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--bronze);
  letter-spacing: 0.05em;
}
.card h3 {
  font-family: "Noto Serif JP", serif;
  font-weight: 600;
  font-size: 1.18rem;
  color: var(--ink);
  margin: 14px 0 12px;
  letter-spacing: 0.02em;
}
.card p { margin: 0; font-size: 0.92rem; color: var(--muted); line-height: 1.9; }

/* ===================== Service ===================== */
.service-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0;
  border-top: 1px solid var(--line);
}
.service-item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 24px;
  align-items: start;
  padding: 32px 16px;
  border-bottom: 1px solid var(--line);
}
.service-item:nth-child(odd) { border-right: 1px solid var(--line); padding-right: 40px; }
.service-item:nth-child(even) { padding-left: 40px; }
.service-num {
  font-family: "Noto Serif JP", serif;
  font-weight: 700;
  font-size: 1.5rem;
  color: var(--bronze);
  line-height: 1.1;
}
.service-body { min-width: 0; }
.service-item h3 {
  font-family: "Noto Serif JP", serif;
  font-weight: 600;
  font-size: 1.2rem;
  color: var(--ink);
  margin: 0 0 8px;
}
.service-item p { margin: 0; font-size: 0.92rem; color: var(--muted); }

/* ===================== Stats ===================== */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.12);
}
.stat { background: rgba(21, 32, 46, 0.72); padding: 38px 28px; }
.stat-label { font-size: 0.82rem; color: var(--bronze-l); letter-spacing: 0.08em; margin: 0 0 14px; }
.stat-num {
  font-family: "Noto Serif JP", serif;
  font-weight: 700;
  font-size: 3.3rem;
  line-height: 1;
  color: #fff;
  margin: 0 0 16px;
}
.stat-num span { font-size: 1.05rem; font-weight: 500; margin-left: 4px; color: var(--muted-d); }
.stat-note { font-size: 0.82rem; color: var(--muted-d); line-height: 1.85; margin: 0; }

/* ===================== Works ===================== */
.works-caption {
  font-family: "Noto Serif JP", serif;
  font-size: 1.05rem;
  color: var(--ink);
  letter-spacing: 0.04em;
  margin: 0 0 28px;
}
.works-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
  margin-bottom: 64px;
}
.work {
  background: var(--paper);
  border: 1px solid var(--line);
  padding: 30px 28px;
  transition: transform 0.2s, box-shadow 0.2s;
}
.work:hover { transform: translateY(-3px); box-shadow: 0 14px 30px rgba(21, 32, 46, 0.08); }
.work-tag {
  display: inline-block;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--bronze);
  border: 1px solid var(--bronze);
  border-radius: 2px;
  padding: 3px 10px;
  margin-bottom: 16px;
}
.work h3 {
  font-family: "Noto Serif JP", serif;
  font-weight: 600;
  font-size: 1.1rem;
  color: var(--ink);
  margin: 0 0 12px;
  line-height: 1.55;
}
.work-meta { font-size: 0.85rem; color: var(--muted); margin: 0; }

.clients-title {
  font-family: "Noto Serif JP", serif;
  font-size: 1.05rem;
  color: var(--ink);
  margin: 0 0 18px;
}
.clients-list { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--line); }
.clients-list li {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
  padding: 16px 4px;
  border-bottom: 1px solid var(--line);
}
.clients-list span { font-weight: 500; color: var(--ink); }
.clients-list em { font-style: normal; font-size: 0.85rem; color: var(--muted); white-space: nowrap; }

/* ===================== Quality & Safety ===================== */
.qs-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; }
.qs-cat {
  font-family: "Noto Serif JP", serif;
  font-weight: 600;
  font-size: 1.15rem;
  color: var(--ink);
  margin: 0 0 18px;
  padding-bottom: 14px;
  border-bottom: 2px solid var(--bronze);
}
.qs-list { list-style: none; margin: 0; padding: 0; }
.qs-list li {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
  padding: 13px 2px;
  border-bottom: 1px solid var(--line);
}
.qs-list span { color: var(--text); font-size: 0.95rem; }
.qs-list em {
  font-style: normal;
  font-family: "Noto Serif JP", serif;
  font-weight: 700;
  color: var(--ink);
  white-space: nowrap;
}
.qs-foot { font-size: 0.85rem; color: var(--muted); margin: 22px 0 0; }

/* ===================== Flow ===================== */
.flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0;
  counter-reset: none;
}
.flow-step {
  position: relative;
  padding: 0 22px;
  border-left: 1px solid var(--line);
}
.flow-step:first-child { border-left: 0; padding-left: 0; }
.flow-num {
  font-family: "Noto Serif JP", serif;
  font-weight: 700;
  font-size: 0.92rem;
  letter-spacing: 0.1em;
  color: var(--bronze);
  display: block;
  margin-bottom: 14px;
}
.flow-step h3 {
  font-family: "Noto Serif JP", serif;
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--ink);
  margin: 0 0 10px;
}
.flow-step p { font-size: 0.86rem; color: var(--muted); margin: 0; line-height: 1.85; }
.flow-note {
  margin: 40px 0 0;
  padding-top: 28px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.92rem;
}

/* ===================== Stability lead ===================== */
.stability-lead {
  font-size: 1rem;
  color: var(--text);
  max-width: 880px;
  margin: 0 0 20px;
  line-height: 2;
}
.stability-lead strong { font-weight: 700; color: var(--ink); }
/* 上場マーク（東証・名証）：第一技研ロゴより小さく表示 */
.listing-marks {
  display: flex;
  align-items: center;
  gap: 20px;
  margin: 0 0 44px;
}
.listing-mark {
  height: 42px;
  width: auto;
  display: block;
}
@media (max-width: 680px) {
  .listing-mark { height: 38px; }
  .listing-marks { gap: 14px; }
}

/* ===================== Company profile ===================== */
.profile { margin: 0; border-top: 1px solid var(--line); }
.profile-row {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 24px;
  padding: 22px 4px;
  border-bottom: 1px solid var(--line);
}
.profile-row dt {
  font-family: "Noto Serif JP", serif;
  font-weight: 600;
  color: var(--ink);
  margin: 0;
}
.profile-row dd { margin: 0; color: var(--text); }
.profile-row dd small { color: var(--muted); font-size: 0.85rem; }
/* 役員は「役職＋氏名」を縦に並べ、氏名の頭を揃える */
.profile-row dd .officer { display: block; }
.profile-row dd .officer + .officer { margin-top: 6px; }
.profile-row dd .officer-role { display: inline-block; min-width: 8.5em; }

/* ===================== Contact ===================== */
/* お問い合わせは連絡先の視認性優先でストーリーを透けさせない */
.section-contact { text-align: center; background: var(--ink); }
.contact-eyebrow {
  font-size: 0.76rem;
  letter-spacing: 0.24em;
  color: var(--bronze-l);
  margin: 0 0 22px;
}
.contact-title {
  font-family: "Noto Serif JP", serif;
  font-weight: 600;
  font-size: clamp(1.7rem, 4vw, 2.5rem);
  line-height: 1.5;
  margin: 0 0 24px;
  color: #fff;
}
.contact-lead {
  color: var(--muted-d);
  max-width: 680px;
  margin: 0 auto 48px;
  font-size: 0.98rem;
  line-height: 2;
}
.contact-card {
  display: inline-block;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 3px;
  padding: 36px 48px;
  background: rgba(255, 255, 255, 0.03);
}
.contact-company {
  font-family: "Noto Serif JP", serif;
  font-weight: 600;
  font-size: 1.1rem;
  color: #fff;
  margin: 0 0 10px;
}
.contact-addr { color: var(--muted-d); font-size: 0.9rem; margin: 0 0 24px; line-height: 2; }
.contact-fax { font-size: 0.85rem; opacity: 0.85; }

/* お問い合わせフォーム */
.contact-form {
  max-width: 680px;
  margin: 8px auto 0;
  text-align: left;
}
.cf-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.cf-field {
  display: block;
  margin-bottom: 16px;
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  color: var(--muted-d);
}
.cf-req {
  display: inline-block;
  font-size: 0.68rem;
  color: #f0d7a8;
  border: 1px solid rgba(240, 215, 168, 0.5);
  border-radius: 2px;
  padding: 1px 6px;
  margin-left: 4px;
  letter-spacing: 0.06em;
}
.contact-form input,
.contact-form textarea {
  display: block;
  width: 100%;
  margin-top: 7px;
  padding: 12px 14px;
  font-family: inherit;
  font-size: 0.95rem;
  color: #fff;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 2px;
  box-sizing: border-box;
  transition: border-color 0.2s, background 0.2s;
}
.contact-form textarea { resize: vertical; min-height: 120px; line-height: 1.8; }
.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--bronze-l);
  background: rgba(255, 255, 255, 0.09);
}
.contact-form input::placeholder,
.contact-form textarea::placeholder { color: var(--muted-d); }
.cf-hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.cf-submit {
  margin-top: 8px;
  border: 0;
  cursor: pointer;
  font-size: 1rem;
  padding: 15px 44px;
}
.cf-note {
  font-size: 0.8rem;
  color: var(--muted-d);
  margin: 16px 0 0;
  line-height: 1.9;
}
.cf-note a {
  color: #f0d7a8;
  border-bottom: 1px solid rgba(240, 215, 168, 0.4);
  padding-bottom: 1px;
  transition: border-color 0.2s;
}
.cf-note a:hover { border-bottom-color: #f0d7a8; }
@media (max-width: 680px) {
  .cf-row { grid-template-columns: 1fr; gap: 0; }
}
.contact-tel {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 28px;
  flex-wrap: wrap;
}
.tel-link {
  font-family: "Noto Serif JP", serif;
  font-weight: 700;
  font-size: 1.75rem;
  color: #fff;
  letter-spacing: 0.04em;
}
.tel-link:hover { color: var(--bronze-l); }
.contact-fax { color: var(--muted-d); font-size: 0.95rem; letter-spacing: 0.04em; }

/* ===================== Footer ===================== */
.site-footer { background: rgba(10, 16, 24, 0.55); color: var(--muted-d); padding: 48px 0; }
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 24px;
}
.footer-brand { display: flex; align-items: center; gap: 22px; flex-wrap: wrap; }
.footer-logo { height: 30px; width: auto; opacity: 0.92; }
.footer-license { font-size: 0.78rem; line-height: 1.8; margin: 0; }
.footer-copy { font-size: 0.78rem; letter-spacing: 0.06em; margin: 0; }

/* 統計サイトへの導線。dai1giken.co.jp/shuzen-stats/ は同じドメインの配下に置いてあり、
   ここからリンクを張ることで、あちらの評価が本サイトと一体になる。**消さないこと。**
   以前は別ドメイン（github.io）にあり、リンクも無かったので評価が本サイトに移らなかった。 */
.footer-stats {
  padding-bottom: 26px;
  margin-bottom: 26px;
  border-bottom: 1px solid rgba(147, 160, 171, 0.18);
}
.footer-stats-link {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 8px 16px;
  text-decoration: none;
  color: var(--muted-d);
}
.footer-stats-label {
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  color: var(--bronze-l);
  border: 1px solid rgba(184, 155, 113, 0.45);
  padding: 3px 10px;
}
.footer-stats-title {
  font-family: "Noto Serif JP", serif;
  font-weight: 700;
  font-size: 1.05rem;
  color: #fff;
  letter-spacing: 0.04em;
}
.footer-stats-link:hover .footer-stats-title { color: var(--bronze-l); }
.footer-stats-desc { font-size: 0.78rem; line-height: 1.8; flex: 1 1 320px; }
.footer-stats-arrow { margin-left: auto; color: var(--bronze-l); font-size: 1.05rem; }
@media (max-width: 680px) {
  .footer-stats-arrow { display: none; }
  .footer-stats-desc { flex-basis: 100%; }
}

/* ===================== Responsive ===================== */
@media (max-width: 920px) {
  .about-grid { grid-template-columns: 1fr; gap: 28px; }
  .card-grid, .card-grid-3 { grid-template-columns: repeat(2, 1fr); }
  .stat-grid { grid-template-columns: repeat(2, 1fr); }
  .works-grid { grid-template-columns: repeat(2, 1fr); }
  .qs-grid { grid-template-columns: 1fr; gap: 40px; }
  .flow { grid-template-columns: 1fr 1fr; gap: 28px 22px; }
  .flow-step { border-left: 0; padding: 0; }
}

@media (max-width: 680px) {
  .pc-only { display: none; }
  /* モバイルは背景モーションを止めて軽量化（各面は不透明に戻す） */
  .site-motion { display: none; }
  .hero-scrim { background: none; }
  .hero { background: var(--ink); }
  .section-dark { background: var(--ink); }
  .stat { background: var(--ink); }
  .site-footer { background: #0e1620; }
  .section { padding: 64px 0; }
  .header-inner { height: 60px; }
  .brand-text { display: none; }

  /* モバイルナビ */
  .nav-toggle { display: flex; }
  .site-nav {
    position: fixed;
    inset: 60px 0 auto 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: #fff;
    border-bottom: 1px solid var(--line);
    padding: 8px 28px 24px;
    transform: translateY(-12px);
    opacity: 0;
    pointer-events: none;
    transition: 0.25s;
    box-shadow: 0 20px 30px rgba(0, 0, 0, 0.06);
  }
  body.nav-open .site-nav { transform: none; opacity: 1; pointer-events: auto; }
  .site-nav a { padding: 14px 0; border-bottom: 1px solid var(--line); }
  .nav-cta { text-align: center; border: 1px solid var(--ink); margin-top: 12px; }
  body.nav-open .nav-toggle span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  body.nav-open .nav-toggle span:nth-child(2) { opacity: 0; }
  body.nav-open .nav-toggle span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

  .sec-head { gap: 16px; margin-bottom: 38px; }
  .sec-num { font-size: 1.6rem; }
  .hero { padding-top: 64px; }
  .card-grid, .card-grid-3 { grid-template-columns: 1fr; }
  .stat-grid { grid-template-columns: 1fr; }
  .works-grid { grid-template-columns: 1fr; }
  .service-list { grid-template-columns: 1fr; }
  .service-item, .service-item:nth-child(odd), .service-item:nth-child(even) {
    padding: 24px 0; border-right: 0;
  }
  .flow { grid-template-columns: 1fr; gap: 24px; }
  .profile-row { grid-template-columns: 1fr; gap: 6px; padding: 18px 4px; }
  .hero-meta { padding-bottom: 32px; }
  .hero-license { text-align: left; }
  .contact-card { padding: 28px 24px; display: block; }
  .contact-tel { gap: 14px; }
}

/* ===================== 工事経歴一覧（トグル） ===================== */
.kg-block { margin-top: 56px; }
.kg-toggle {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 16px;
  background: var(--paper);
  border: 1px solid var(--ink);
  border-radius: 2px;
  padding: 22px 28px;
  cursor: pointer;
  text-align: left;
  transition: background 0.2s, color 0.2s;
}
.section-tint .kg-toggle { background: var(--tint); }
.kg-toggle:hover { background: var(--ink); color: #fff; }
.kg-toggle-main {
  font-family: "Noto Serif JP", serif;
  font-weight: 600;
  font-size: 1.12rem;
  letter-spacing: 0.02em;
}
.kg-toggle-sub { font-size: 0.85rem; color: var(--muted); }
.kg-toggle:hover .kg-toggle-sub { color: var(--muted-d); }
.kg-toggle-icon {
  margin-left: auto;
  width: 12px; height: 12px;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: rotate(45deg);
  transition: transform 0.25s;
  flex-shrink: 0;
}
.kg-toggle[aria-expanded="true"] .kg-toggle-icon { transform: rotate(-135deg); }

.kg-panel {
  border: 1px solid var(--line);
  border-top: 0;
  background: var(--paper);
  padding: 28px;
}
.kg-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  flex-wrap: wrap;
  margin-bottom: 18px;
}
.kg-search {
  flex: 1 1 260px;
  font-family: inherit;
  font-size: 0.95rem;
  padding: 12px 16px;
  border: 1px solid var(--line);
  border-radius: 2px;
  color: var(--text);
  background: var(--tint);
}
.kg-search:focus { outline: none; border-color: var(--bronze); background: #fff; }
.kg-filters { display: flex; gap: 8px; flex-wrap: wrap; }
.kg-filter {
  font-family: inherit;
  font-size: 0.85rem;
  padding: 9px 16px;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--muted);
  border-radius: 2px;
  cursor: pointer;
  transition: 0.18s;
}
.kg-filter:hover { border-color: var(--ink); color: var(--ink); }
.kg-filter.is-active { background: var(--ink); color: #fff; border-color: var(--ink); }
.kg-note { font-size: 0.82rem; color: var(--muted); margin: 0 0 16px; }
.kg-count { margin-left: 6px; color: var(--bronze); font-weight: 500; }

.kg-tablewrap { max-height: 62vh; overflow: auto; border: 1px solid var(--line); }
.kg-table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
.kg-table thead th {
  position: sticky;
  top: 0;
  z-index: 1;
  background: var(--ink);
  color: #fff;
  font-family: "Noto Serif JP", serif;
  font-weight: 600;
  font-size: 0.86rem;
  text-align: left;
  padding: 13px 16px;
  letter-spacing: 0.03em;
  white-space: nowrap;
}
.kg-table tbody td { padding: 12px 16px; border-bottom: 1px solid var(--line); vertical-align: top; }
.kg-table tbody tr:nth-child(even) { background: var(--tint); }
.kg-table tbody tr:hover { background: #eef0f1; }
.kg-date { white-space: nowrap; color: var(--muted); font-variant-numeric: tabular-nums; }
.kg-name { font-weight: 500; color: var(--ink); min-width: 180px; }
.kg-work { color: var(--text); }
.kg-badge {
  display: inline-block;
  font-size: 0.72rem;
  padding: 2px 9px;
  border-radius: 2px;
  white-space: nowrap;
}
.kg-comm { background: #e7ecf2; color: #2a4666; }
.kg-resi { background: #efeadf; color: #7a5f33; }

@media (max-width: 680px) {
  .kg-toggle { padding: 18px 20px; flex-wrap: wrap; gap: 6px; }
  .kg-toggle-icon { margin-left: auto; }
  .kg-panel { padding: 18px 14px; }
  .kg-table { font-size: 0.82rem; }
  .kg-table thead th, .kg-table tbody td { padding: 10px 10px; }
  .kg-cat { display: none; }
  .kg-tablewrap { max-height: 70vh; }
}