/* =========================================================
   藤鉄工業株式会社  共通スタイル
   信頼感・重厚デザイン  /  ネイビー × スチール × ブラス
   ========================================================= */

:root {
  --navy:      #2b7a51;   /* 緑（見出し・濃い面・フッター） */
  --navy-2:    #328c5c;
  --navy-3:    #3f9d6c;
  --steel:     #6f8b7d;
  --steel-lt:  #a4c2b2;
  --line:      #dfece4;
  --bg:        #ffffff;
  --bg-soft:   #f2faf5;
  --bg-soft-2: #e6f4eb;
  --ink:       #223029;
  --ink-soft:  #4b5d55;
  --accent:    #3fa06d;   /* アクセントグリーン */
  --accent-dk: #2f8156;
  --radius:    10px;
  --maxw:      1140px;
  --shadow:    0 10px 30px rgba(19,74,42,.10);
  --shadow-lg: 0 24px 60px rgba(19,74,42,.18);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.85;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

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

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

/* ---------- セクション見出し ---------- */
.section { padding: 92px 0; }
.section--soft { background: var(--bg-soft); }

.sec-head { text-align: center; margin-bottom: 56px; }
.sec-head .en {
  display: block; letter-spacing: .28em; font-size: 13px; font-weight: 700;
  color: var(--accent); margin-bottom: 14px; text-transform: uppercase;
}
.sec-head .ja {
  font-size: clamp(26px, 3.4vw, 36px); font-weight: 700; color: var(--navy);
  letter-spacing: .04em; position: relative; display: inline-block; padding-bottom: 18px;
}
.sec-head .ja::after {
  content: ""; position: absolute; left: 50%; bottom: 0; transform: translateX(-50%);
  width: 52px; height: 3px; background: var(--accent);
}

/* ---------- ヘッダー ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.94); backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 76px; max-width: var(--maxw); margin: 0 auto; padding: 0 24px;
}
.brand { display: flex; align-items: center; gap: 14px; }
.brand .mark {
  width: 46px; height: 46px; flex: none;
  display: block; object-fit: contain;
  background: none; border-radius: 0; box-shadow: none;
}
.brand .txt b { display: block; font-size: 18px; color: var(--navy); letter-spacing: .06em; line-height: 1.3; }
.brand .txt span { display: block; font-size: 11px; color: var(--steel); letter-spacing: .14em; }

.nav { display: flex; align-items: center; gap: 4px; }
.nav a {
  padding: 10px 16px; font-size: 14.5px; font-weight: 500; color: var(--ink-soft);
  border-radius: 6px; transition: .2s; letter-spacing: .04em;
}
.nav a:hover { color: var(--navy); background: var(--bg-soft); }
.nav a.is-active { color: var(--navy); font-weight: 700; }
.nav .nav-cta {
  margin-left: 8px; background: var(--accent); color: #fff; font-weight: 700;
}
.nav .nav-cta:hover { background: var(--accent-dk); color: #fff; }
.nav .nav-employee { color: var(--navy); font-size: 13px; }

.nav-toggle {
  display: none; width: 44px; height: 44px; border: 1px solid var(--line);
  background: #fff; border-radius: 8px; cursor: pointer; position: relative;
}
.nav-toggle span, .nav-toggle span::before, .nav-toggle span::after {
  content: ""; position: absolute; left: 50%; transform: translateX(-50%);
  width: 20px; height: 2px; background: var(--navy); transition: .2s;
}
.nav-toggle span { top: 50%; }
.nav-toggle span::before { top: -6px; }
.nav-toggle span::after { top: 6px; }

/* ---------- ヒーロー（汎用 下層ページ） ---------- */
.page-hero {
  position: relative; color: #fff; text-align: center;
  padding: 96px 24px; overflow: hidden;
  background: linear-gradient(135deg, var(--navy) 0%, var(--navy-3) 100%);
}
.page-hero::after {
  content: ""; position: absolute; inset: 0; opacity: .14;
  background-image: linear-gradient(135deg, rgba(255,255,255,.18) 25%, transparent 25%, transparent 50%, rgba(255,255,255,.18) 50%, rgba(255,255,255,.18) 75%, transparent 75%);
  background-size: 24px 24px;
}
.page-hero .inner { position: relative; z-index: 1; }
.page-hero .en { letter-spacing: .3em; color: var(--accent); font-size: 13px; font-weight: 700; }
.page-hero h1 { font-size: clamp(28px, 4vw, 42px); margin-top: 12px; letter-spacing: .06em; }
.breadcrumb { font-size: 13px; color: var(--steel-lt); margin-top: 18px; letter-spacing: .04em; }
.breadcrumb a:hover { color: #fff; }

/* ---------- ボタン ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 15px 34px; border-radius: 6px; font-weight: 700; font-size: 15px;
  letter-spacing: .06em; transition: .25s; cursor: pointer; border: none;
}
.btn--accent { background: var(--accent); color: #fff; box-shadow: 0 8px 20px rgba(63,160,109,.32); }
.btn--accent:hover { background: var(--accent-dk); transform: translateY(-2px); }
.btn--ghost { background: transparent; color: #fff; border: 1.5px solid rgba(255,255,255,.55); }
.btn--ghost:hover { background: #fff; color: var(--navy); }
.btn--navy { background: var(--navy); color: #fff; }
.btn--navy:hover { background: var(--navy-3); transform: translateY(-2px); }
.btn .arrow { transition: .25s; }
.btn:hover .arrow { transform: translateX(4px); }

/* ---------- フッター帯 / CTA ---------- */
.cta-band {
  background: linear-gradient(135deg, var(--navy) 0%, var(--navy-3) 100%);
  color: #fff; text-align: center; padding: 80px 24px;
}
.cta-band .en { letter-spacing: .3em; color: var(--accent); font-size: 13px; font-weight: 700; }
.cta-band h2 { font-size: clamp(24px, 3vw, 32px); margin: 12px 0 16px; letter-spacing: .05em; }
.cta-band p { color: #c5cedb; margin-bottom: 32px; }

/* ---------- フッター ---------- */
.site-footer { background: var(--navy); color: #c4cdda; padding: 64px 0 28px; font-size: 14px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 40px; }
.footer-grid h4 { color: #fff; font-size: 16px; margin-bottom: 16px; letter-spacing: .08em; }
.footer-brand b { color: #fff; font-size: 20px; letter-spacing: .08em; }
.footer-brand p { margin-top: 14px; line-height: 1.9; color: #98a4b6; }
.footer-links a { display: block; padding: 7px 0; color: #c4cdda; transition: .2s; }
.footer-links a:hover { color: var(--accent); }
.footer-contact div { margin-bottom: 12px; }
.footer-contact .lab { color: var(--accent); font-size: 12px; letter-spacing: .12em; }
.footer-contact .val { color: #fff; font-size: 18px; font-weight: 700; letter-spacing: .04em; }
.footer-bottom {
  margin-top: 48px; padding-top: 22px; border-top: 1px solid rgba(255,255,255,.1);
  text-align: center; color: #7f8da1; font-size: 12px; letter-spacing: .04em;
}

/* ---------- 汎用カード / グリッド ---------- */
.grid { display: grid; gap: 28px; }
.cols-3 { grid-template-columns: repeat(3, 1fr); }
.cols-2 { grid-template-columns: repeat(2, 1fr); }
.cols-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  overflow: hidden; box-shadow: var(--shadow); transition: .3s;
}
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.card .thumb { aspect-ratio: 4/3; overflow: hidden; background: var(--bg-soft-2); }
.card .thumb img { width: 100%; height: 100%; object-fit: cover; transition: .5s; }
.card:hover .thumb img { transform: scale(1.06); }
.card .body { padding: 22px 24px 26px; }
.card .body h3 { font-size: 19px; color: var(--navy); margin-bottom: 10px; letter-spacing: .04em; }
.card .body p { color: var(--ink-soft); font-size: 14.5px; }
.card .num { font-size: 13px; font-weight: 800; color: var(--accent); letter-spacing: .16em; }

/* ---------- テーブル ---------- */
.table-wrap { overflow-x: auto; box-shadow: var(--shadow); border-radius: var(--radius); }
table.tbl { width: 100%; border-collapse: collapse; background: #fff; font-size: 14.5px; min-width: 560px; }
table.tbl th, table.tbl td { padding: 15px 18px; text-align: left; border-bottom: 1px solid var(--line); }
table.tbl th {
  background: var(--navy-2); color: #fff; font-weight: 600; letter-spacing: .06em; white-space: nowrap;
}
table.tbl tbody th { background: var(--bg-soft); color: var(--navy); width: 30%; }
table.tbl tbody tr:hover td { background: #fafbfc; }
table.tbl .cat { background: var(--bg-soft-2); font-weight: 700; color: var(--navy); }

/* ---------- 区切り ---------- */
.fade-up { opacity: 0; transform: translateY(24px); transition: .7s cubic-bezier(.2,.7,.3,1); }
.fade-up.in { opacity: 1; transform: none; }

/* ---------- レスポンシブ ---------- */
@media (max-width: 900px) {
  .cols-3, .cols-4 { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .nav {
    position: fixed; inset: 76px 0 auto 0; flex-direction: column; align-items: stretch;
    background: #fff; border-bottom: 1px solid var(--line); padding: 12px 20px 20px;
    gap: 2px; box-shadow: var(--shadow); display: none;
  }
  .nav.open { display: flex; }
  .nav a { padding: 14px 12px; font-size: 16px; }
  .nav .nav-cta { margin: 8px 0 0; text-align: center; }
  .nav .nav-employee { font-size: 16px; }
  .nav-toggle { display: block; }
}
@media (max-width: 600px) {
  .section { padding: 64px 0; }
  .cols-2, .cols-3, .cols-4 { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .brand .txt span { display: none; }
}