.chapter-header {
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid #dce2ee;
  background: rgba(255, 255, 255, .98);
  box-shadow: 0 5px 17px rgba(8, 30, 78, .07);
}
.chapter-header-inner {
  display: flex;
  align-items: center;
  gap: 18px;
  max-width: 1230px;
  min-height: 72px;
  margin: 0 auto;
  padding: 8px 28px;
}
.chapter-brand {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 10px;
  color: #081e4e;
  font-size: 12px;
  font-weight: 850;
  letter-spacing: .055em;
  text-decoration: none;
  text-transform: uppercase;
  white-space: nowrap;
}
.chapter-brand img {
  display: block;
  width: 49px;
  height: 49px;
  object-fit: contain;
}
.chapter-menu {
  display: flex;
  flex: 1 1 auto;
  align-items: center;
  flex-wrap: nowrap;
  justify-content: flex-end;
  gap: 2px;
  min-width: 0;
  overflow-x: auto;
  white-space: nowrap;
  scrollbar-width: thin;
}
.chapter-menu a {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  min-height: 38px;
  padding: 7px 9px;
  border: 1px solid transparent;
  border-radius: 8px;
  color: #4e5c75;
  font-size: 12px;
  font-weight: 800;
  text-decoration: none;
}
.chapter-menu a:hover,
.chapter-menu a:focus-visible {
  border-color: #efc5ca;
  background: #fff0f1;
  color: #a31322;
}
.chapter-index {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  justify-content: center;
  min-height: 38px;
  padding: 7px 15px;
  border: 1px solid #c91d2c;
  border-radius: 8px;
  background: #c91d2c;
  box-shadow: 0 3px 9px rgba(163, 19, 34, .18);
  color: #fff;
  font-size: 12px;
  font-weight: 850;
  text-decoration: none;
}
.chapter-index:hover,
.chapter-index:focus-visible {
  border-color: #a31322;
  background: #a31322;
  color: #fff;
}
.chapter-header a:focus-visible { outline: 3px solid #c91d2c; outline-offset: 2px; }
[id] { scroll-margin-top: 88px; }
.mobile-swipe-hint { display: none; }
@media (max-width: 750px) {
  .chapter-header-inner { gap: 10px; min-height: 60px; padding: 6px 16px; }
  .chapter-brand img { width: 42px; height: 42px; }
  .chapter-brand span { display: none; }
  .chapter-menu { justify-content: flex-start; -webkit-overflow-scrolling: touch; }
  .chapter-menu a { font-size: 11px; }
  .mobile-swipe-hint {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    width: fit-content;
    max-width: 100%;
    margin: 12px 0 8px;
    padding: 7px 11px;
    border: 1px solid #ead8a9;
    border-radius: 999px;
    background: #fff9e9;
    color: #684b13;
    font-size: 12px;
    font-weight: 750;
    line-height: 1.25;
  }
  .mobile-swipe-hint span { font-size: 17px; line-height: 1; }
  .map-shell, .table-wrap, .table-scroll { -webkit-overflow-scrolling: touch; }
}
@media print { .chapter-header, .mobile-swipe-hint { display: none; } }