@charset "UTF-8";

/* ============================================================
   沿革（History）
   - デザイン基準：PC 1280px（コンテンツ幅 約890px 中央）
   - ヘッダー・フッターはフル幅、コンテンツは中央寄せ
   - SP はレイアウトが崩れない範囲で段組み変更
   ============================================================ */

/* ---------- Reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; }
h1, h2, h3, h4, h5, h6, p, figure, figcaption, dl, dd, dt { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
img, picture, svg { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }

/* ---------- Tokens ---------- */
:root {
  --c-navy: #0c1d3d;
  --c-black: #000;
  --c-line: #c9c9c9;
  --c-subbar: #d9d9d9;
  --c-footer: #14133b;

  --ff-jp: "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Yu Gothic", "游ゴシック", "Meiryo", sans-serif;
  --ff-en: "Inter", "Helvetica Neue", Arial, sans-serif;
  --ff-en-head: "Avenir Next", "Segoe UI", "Inter", "Helvetica Neue", Arial, sans-serif;

  --page-w: 1280px;
  --content-w: 890px;
}

/* ---------- Base ---------- */
body {
  font-family: var(--ff-jp);
  color: var(--c-black);
  background: #fff;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
.page { background: #fff; }

/* ---------- Global header / footer（帯フル幅・中身は中央 max1280） ---------- */
.site-header { width: 100%; background: #fff; }
.site-footer { width: 100%; background: var(--c-footer); }
.site-header img,
.site-footer img {
  display: block;
  width: 100%;
  max-width: var(--page-w);
  height: auto;
  margin: 0 auto;
}

/* ---------- Breadcrumb（フル幅帯） ---------- */
.subbar { width: 100%; background: var(--c-subbar); }
.subbar__inner {
  max-width: var(--page-w);
  margin: 0 auto;
  min-height: 25px;
  display: flex;
  align-items: center;
  padding: 0 47px;
}
.breadcrumb {
  font-family: var(--ff-jp);
  font-size: 10px;
  line-height: 1.4;
  color: #000;
}
.breadcrumb__link { font-weight: 300; }

/* ---------- Content ---------- */
.content { padding: 56px 0 100px; }
.content__inner {
  width: var(--content-w);
  max-width: calc(100% - 48px);
  margin: 0 auto;
}

/* ---------- Section heading ---------- */
.sec__head {
  padding-bottom: 18px;
  border-bottom: 1px solid var(--c-line);
}
.sec__title {
  font-family: var(--ff-en-head);
  font-weight: 700;
  font-size: 35px;
  line-height: 1.4;
  color: var(--c-navy);
}
.sec__sub {
  margin-top: 10px;
  font-family: var(--ff-jp);
  font-weight: 600;
  font-size: 20px;
  line-height: 1.4;
  color: var(--c-black);
}

/* ---------- 年表 ---------- */
.history { margin-top: 30px; }
.history__row {
  display: flex;
  font-family: var(--ff-jp);
  font-weight: 300;
  font-size: 18px;
  line-height: 1.8;
  color: var(--c-black);
  border-bottom: solid 1px #D2D7E1;
  padding: 5px 0;
}
.history__row dt {
  flex: 0 0 116px;
  font-weight: 300;
  line-height: 1.7;
}
.history__row dd { flex: 1 1 auto;line-height: 1.7; }

/* ---------- 写真 ---------- */
.history-photos {
  display: flex;
  align-items: flex-start;
  gap: 48px;
  margin-top: 56px;
}
.history-photos__item img {
  width: 100%;
  height: auto;
}
.history-photos__item figcaption {
  margin-top: 14px;
  font-family: var(--ff-jp);
  font-weight: 300;
  font-size: 12px;
  line-height: 1.4;
  color: var(--c-black);
}
.history-photos__item--1 { flex: 0 0 355px; }
.history-photos__item--1 img { width: 305px; }
.history-photos__item--2 { flex: 0 0 382px; }

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 1024px) {
  .content { padding: 48px 0 80px; }
  .sec__title { font-size: clamp(26px, 3.4vw, 35px); }
}

@media (max-width: 768px) {
  .content__inner { max-width: calc(100% - 40px); }
  .sec__sub { font-size: clamp(15px, 2.4vw, 20px); }

  .history__row { font-size: 15px; line-height: 1.7; }
  .history__row dt { flex-basis: 96px; }

  /* 写真：縦積み */
  .history-photos {
    flex-direction: column;
    gap: 32px;
    align-items: center;
  }
  .history-photos__item { width: 100%; max-width: 460px; flex: 0 0 auto; }
  .history-photos__item--1 img,
  .history-photos__item--2 img { width: 100%; }
  .history-photos__item figcaption { font-size: 12px; }
}

@media (max-width: 480px) {
  .subbar__inner { padding: 0 20px; min-height: 20px; }
  .content { padding: 32px 0 56px; }
  .content__inner { max-width: calc(100% - 32px); }

  .history { margin-top: 24px; }
  .history__row { flex-direction: column; }
  .history__row dt { flex-basis: auto; font-weight: 600; margin-top: 6px; }
  .history__row:first-child dt { margin-top: 0; }
  .history__row dd { margin-bottom: 4px; }
}