body {
  margin: 0;
  font-family: "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
  color: #333;
  background: #fff;
  line-height: 1.7;
}

.top-line {
  height: 6px;
  background: #b08a3c;
}

.container {
  width: min(960px, calc(100% - 32px));
  margin: 0 auto;
}

.site-header {
  padding: 28px 0 18px;
  background: #fff;
}

.site-logo a {
  color: #222;
  text-decoration: none;
  font-size: 2rem;
  font-weight: 700;
  display: block;
  width: 100%;
}

.site-description {
  margin: 8px 0 0;
  color: #666;
  font-size: 0.95rem;
}

.global-nav {
  background: #8c6b2f;
}

.global-nav .container {
  display: flex;
  flex-wrap: wrap;
}

.global-nav a {
  color: #fff;
  text-decoration: none;
  padding: 12px 18px;
  display: inline-block;
  font-size: 0.95rem;
}

.global-nav a:hover {
  background: #735823;
}

.notice-bar {
  background: #f5f1e7;
  border-top: 1px solid #ddd2b5;
  border-bottom: 1px solid #ddd2b5;
  padding: 10px 0;
  color: #5a4a22;
  font-size: 0.95rem;
}

.page-main {
  padding: 24px 0 48px;
}

.hero-slider {
  margin: 0 auto 32px;
  max-width: 960px;
}

.slider-window {
  overflow: hidden;
  width: 100%;
  padding: 0;
}

.slider-track {
  display: flex;
  gap: 24px;
  transition: transform 0.8s ease;
}

.slide {
  flex: 0 0 min(640px, 100%);
  width: min(640px, 100%);
  height: 260px;
  border: 1px solid #d8d8d8;
  background: #fafafa;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  overflow: hidden;
}

.slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.content-section {
  margin-bottom: 36px;
}

.content-section h2 {
  font-size: 1.4rem;
  border-bottom: 2px solid #b08a3c;
  padding-bottom: 6px;
  margin-bottom: 14px;
}

.note {
  font-size: 0.85rem;
  color: #666;
  margin-top: -10px;
  margin-bottom: 20px;
}

.site-logo-image {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  margin: 0 auto;
}

/* 英語ページだけPCで少し大きく */
@media (min-width: 769px) {
  .logo-en {
    transform: scale(1.10);
    transform-origin: center;
    margin-bottom: 20px;
  }
}

.site-footer {
  margin-top: 60px;
  padding: 30px 0;
  border-top: 1px solid #ddd;
  background: #f9f9f9;
}

.site-footer h3 {
  font-size: 1.2rem;
  margin-bottom: 14px;
}

.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  column-gap: 40px;
  row-gap: 8px;
}

.footer-links li {
  margin: 0;
  padding: 0;
}

.footer-links a {
  color: #0044cc;
  text-decoration: none;
}

.footer-copy {
  margin-top: 30px;
  padding-top: 15px;
  border-top: 1px solid #ddd;
  text-align: center;
  font-size: 0.9rem;
  color: #666;
}

.research-grid {
  display: flex;
  gap: 20px;
  margin: 30px 0;
}

.research-card {
  flex: 1;
  border: 1px solid #ddd;
  padding: 16px;
  background: #fafafa;
}

.research-card img {
  width: 100%;
  height: auto;
  margin-bottom: 10px;
}

@media (max-width: 768px) {
  .header-inner {
    display: block;
    width: 100%;
    overflow: hidden;
  }

  .site-logo-image {
    width: 100vw !important;
    max-width: 100vw !important;
    height: auto !important;
    margin: 0 auto !important;
    transform: none !important;
  }

  .logo-en,
  .logo-ja {
    transform: none !important;
    margin-bottom: 0 !important;
  }

  .site-description {
    text-align: center;
    font-size: 14px;
    line-height: 1.5;
    margin-top: 8px;
  }

  .research-grid {
    flex-direction: column;
  }

  .footer-links {
    grid-template-columns: 1fr;
  }
}