:root {
  --blue:         #005AAB;
  --blue-dark:    #368AD5;
  --blue-deeper:  #003F78;
  --blue-vivid:   #0A70E3;
  --blue-light:   #EBF4FC;
  --white:        #ffffff;
  --off-white:    #F9F9F8;
  --gray-100:     #D0D0D9;
  --gray-200:     #9EAAB1;
  --gray-400:     #656568;
  --gray-600:     #5F6368;
  --text:         #191A1C;
  --sans:         "Gen Interface JP", Helvetica, "Hiragino Sans", "Noto Sans JP", sans-serif;
  --transition:   0.18s ease;
}

@font-face { font-family: "Gen Interface JP"; src: url("/fonts/gen-interface-jp/GenInterfaceJP-Regular.woff2") format("woff2"), local("Gen Interface JP"); font-weight: 400; font-display: swap; }
@font-face { font-family: "Gen Interface JP-Bold"; src: url("/fonts/gen-interface-jp/GenInterfaceJP-Bold.woff2") format("woff2"), local("Gen Interface JP-Bold"); font-weight: 700; font-display: swap; }

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: var(--sans); font-size: 18px; line-height: 1.8; color: var(--text); background: var(--white); -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }
a { text-decoration: none; color: inherit; }

.breadcrumb { background: transparent; border-bottom: none; padding: 0; }
.breadcrumb__inner {
  max-width: 1200px; margin: 0 auto; padding: 12px 48px;
  display: flex; align-items: center; gap: 8px;
  font-size: 12px; color: var(--gray-600);
}
.breadcrumb a { color: var(--blue); text-decoration: underline; transition: color var(--transition); }
.breadcrumb a:hover { color: var(--blue-dark); }
.breadcrumb__sep { color: var(--gray-400); font-size: 11px; }
.breadcrumb__cur { color: var(--text); font-weight: 500; }

.detail-section a:not(.env-video-btn) { color: var(--blue); text-decoration: underline; }
.detail-section a:not(.env-video-btn):hover { color: var(--blue-dark); }

.page-layout { max-width: 1200px; margin: 0 auto; padding: 40px 48px 56px; }
.page-main { min-width: 0; }
.page-h1 {
  font-size: 48px; font-weight: 800; color: var(--text);
  letter-spacing: -0.02em; margin-bottom: 16px;
}
.page-intro { font-size: 18px; color: var(--text); line-height: 1.85; margin-bottom: 16px; }
.page-intro:last-child { margin-bottom: 0; }

.detail-section { margin-bottom: 48px; }

.env-photo-single { border-radius: 16px; overflow: hidden; margin-bottom: 48px; }
.env-photo-single img { width: 100%; height: auto; display: block; }

.env-video-btn {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--blue); color: #fff; font-size: 18px; font-weight: 700;
  padding: 12px 24px; border-radius: 100px; text-decoration: none;
  transition: background var(--transition);
}
.env-video-btn:hover { background: var(--blue-deeper); }
.env-video-btn i { font-size: 11px; }

.env-note-box { background: var(--off-white); border: 1px solid var(--gray-200); border-radius: 16px; padding: 24px 28px; }
.env-note-box__title { font-size: 24px; font-weight: 700; color: var(--text); margin-bottom: 8px; }
.env-note-box__desc { font-size: 18px; color: var(--text); line-height: 1.8; }

@media (max-width: 768px) {
  .breadcrumb__inner { padding: 10px 20px; font-size: 10px; flex-wrap: wrap; }
  .page-layout { max-width: 100%; margin: 0; padding: 32px 20px; }
  .page-h1 { font-size: 28px; }
  .page-intro { font-size: 12px; }
  .env-photo-single { margin-bottom: 32px; }
  .env-note-box__title { font-size: 16px; }
  .env-note-box__desc { font-size: 12px; }
  .env-video-btn { font-size: 16px; }
}