.lab-header {
  box-sizing: border-box;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px 28px;
  width: min(100% - 112px, 1424px);
  min-height: 108px;
  margin-inline: auto;
  padding-block: 18px;
  border-bottom: 1px solid #d1d6cb;
  color: #193b31;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
}

.lab-header a {
  color: inherit;
  text-decoration: none;
}

.lab-brand {
  display: inline-flex;
  align-items: center;
  gap: 18px;
  min-height: 44px;
}

.lab-brand-name {
  font-size: 25px;
  font-weight: 750;
  letter-spacing: -1.1px;
  line-height: 1.4;
}

.lab-brand-slash {
  margin-left: 17px;
  color: #c4532b;
  font-weight: 400;
}

.lab-brand-author {
  font-size: 14px;
  letter-spacing: .04em;
}

.lab-nav {
  display: flex;
  align-items: center;
  gap: 32px;
  font-size: 13px;
  line-height: 1.5;
}

.lab-nav a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding-block: 10px;
  box-sizing: border-box;
  border-bottom: 2px solid transparent;
  white-space: nowrap;
}

.lab-nav a[aria-current="page"] {
  color: #b34824;
  border-bottom-color: currentColor;
}

.lab-header a:hover {
  color: #b34824;
}

.lab-header a:focus-visible {
  outline: 2px solid #c4532b;
  outline-offset: 5px;
  border-radius: 2px;
}

@media (max-width: 1180px) {
  .lab-header { width: calc(100% - 72px); }
}

@media (max-width: 860px) {
  .lab-header { width: calc(100% - 56px); min-height: 90px; }
}

@media (max-width: 540px) {
  .lab-header { width: calc(100% - 40px); min-height: 82px; gap: 10px 20px; padding-block: 16px; }
  .lab-brand { gap: 11px; }
  .lab-brand-name { font-size: 21px; }
  .lab-brand-slash { margin-left: 10px; }
  .lab-brand-author { display: none; }
  .lab-nav { gap: 20px; font-size: 12px; }
}