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

:root {
  --teal: #4EA99E;
  --teal-light: #5CC5B8;
  --teal-soft: #E0F5F1;
  --white: #FFFFFF;
  --cream: #FFFDF8;
  --dark: #2D2D2D;
  --dark-sub: #4A4A4A;
  --gray: #7A7A7A;
  --gray-border: #ECECEC;
  --font: 'Noto Sans JP', 'Hiragino Kaku Gothic ProN', sans-serif;
  --font-en: 'DM Sans', sans-serif;
}

html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body { font-family: var(--font); font-weight: 400; color: var(--dark); background: var(--cream); line-height: 1.9; font-size: 15px; }
a { color: inherit; text-decoration: none; }

/* HEADER */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--gray-border);
  height: 64px;
  display: flex;
  align-items: center;
}
.header-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.header-logo {
  font-weight: 700;
  font-size: 16px;
  color: var(--teal);
  letter-spacing: 0.04em;
}
.header-back {
  font-size: 13px;
  color: var(--gray);
  transition: color 0.2s;
}
.header-back:hover { color: var(--teal); }

/* MAIN */
.main {
  max-width: 800px;
  margin: 0 auto;
  padding: 60px 24px 100px;
}

.page-title-en {
  font-family: var(--font-en);
  font-size: 12px;
  font-weight: 500;
  color: var(--teal);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: 8px;
}
.page-title {
  font-size: 28px;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 48px;
  letter-spacing: 0.04em;
}

/* SECTION */
.sitemap-section {
  margin-bottom: 40px;
}
.sitemap-section-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--teal);
  letter-spacing: 0.06em;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--teal-soft);
  margin-bottom: 16px;
}
.sitemap-list {
  list-style: none;
}
.sitemap-list li {
  border-bottom: 1px solid var(--gray-border);
}
.sitemap-list li:last-child {
  border-bottom: none;
}
.sitemap-list a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 8px;
  font-size: 15px;
  font-weight: 400;
  color: var(--dark-sub);
  transition: color 0.2s, background 0.2s;
  border-radius: 6px;
}
.sitemap-list a:hover {
  color: var(--teal);
  background: var(--teal-soft);
}
.sitemap-list .link-arrow {
  font-size: 12px;
  color: var(--gray);
  transition: color 0.2s, transform 0.2s;
  flex-shrink: 0;
  margin-left: 12px;
}
.sitemap-list a:hover .link-arrow {
  color: var(--teal);
  transform: translateX(3px);
}
.sitemap-list .link-url {
  font-family: var(--font-en);
  font-size: 12px;
  color: var(--gray);
  margin-left: 12px;
  flex-shrink: 0;
}
.external-badge {
  display: inline-block;
  font-size: 10px;
  font-weight: 500;
  color: var(--teal);
  background: var(--teal-soft);
  padding: 2px 8px;
  border-radius: 10px;
  margin-left: 8px;
  flex-shrink: 0;
}

/* FOOTER */
.footer {
  background: var(--dark);
  color: rgba(255,255,255,0.5);
  text-align: center;
  padding: 32px 24px;
  font-size: 12px;
  letter-spacing: 0.04em;
}
.footer a {
  color: rgba(255,255,255,0.7);
  transition: color 0.2s;
}
.footer a:hover { color: var(--white); }

/* RESPONSIVE */
@media (max-width: 600px) {
  .page-title { font-size: 22px; margin-bottom: 36px; }
  .sitemap-list a { padding: 12px 4px; font-size: 14px; }
  .sitemap-list .link-url { display: none; }
  .main { padding: 40px 16px 80px; }
}