.catalog-header[data-site-navigation-v4],
.catalog-header[data-site-navigation-v4] * {
  box-sizing: border-box;
}

.catalog-header[data-site-navigation-v4] {
  --site-navigation-paper: #f7f7f5;
  --site-navigation-panel: #ffffff;
  --site-navigation-ink: #151515;
  --site-navigation-muted: #62676f;
  --site-navigation-line: #d7d8d5;
  --site-navigation-accent: #2b6bff;
  --site-navigation-max: 1240px;
  position: relative;
  z-index: 30;
  border-bottom: 1px solid var(--site-navigation-line);
  background: rgba(247, 247, 245, 0.96);
  color: var(--site-navigation-ink);
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.65;
}

.catalog-header[data-site-navigation-v4] a {
  color: inherit;
  text-decoration: none;
}

.catalog-header[data-site-navigation-v4] button {
  color: inherit;
  font: inherit;
}

.catalog-header[data-site-navigation-v4] img {
  display: block;
  max-width: 100%;
}

.catalog-header[data-site-navigation-v4] .catalog-shell {
  width: min(calc(100% - 48px), var(--site-navigation-max));
  margin-inline: auto;
}

.catalog-header[data-site-navigation-v4] .catalog-header__row {
  display: grid;
  grid-template-columns: 178px minmax(0, 1fr) auto;
  align-items: center;
  min-height: 76px;
  gap: 32px;
}

.catalog-header[data-site-navigation-v4] .catalog-brand {
  width: 162px;
}

.catalog-header[data-site-navigation-v4] .catalog-brand img {
  width: 100%;
  height: auto;
}

.catalog-header[data-site-navigation-v4] .catalog-nav {
  display: flex;
  align-items: center;
  gap: 30px;
}

.catalog-header[data-site-navigation-v4] .catalog-nav__knowledge {
  position: relative;
  display: flex;
  align-self: stretch;
  align-items: center;
}

.catalog-header[data-site-navigation-v4] .catalog-nav > a,
.catalog-header[data-site-navigation-v4] .catalog-nav__knowledge > a {
  position: relative;
  padding-block: 25px;
  font-size: 14px;
  white-space: nowrap;
}

.catalog-header[data-site-navigation-v4] .catalog-nav > a::after,
.catalog-header[data-site-navigation-v4] .catalog-nav__knowledge > a::after {
  position: absolute;
  right: 0;
  bottom: 18px;
  left: 0;
  height: 1px;
  background: currentColor;
  content: "";
  opacity: 0;
}

.catalog-header[data-site-navigation-v4] .catalog-nav > a:hover::after,
.catalog-header[data-site-navigation-v4] .catalog-nav > a.is-current::after,
.catalog-header[data-site-navigation-v4] .catalog-nav__knowledge > a:hover::after,
.catalog-header[data-site-navigation-v4] .catalog-nav__knowledge > a.is-current::after {
  opacity: 1;
}

.catalog-header[data-site-navigation-v4] .catalog-knowledge-menu {
  position: absolute;
  z-index: 40;
  top: calc(100% - 1px);
  left: -20px;
  width: 220px;
  padding: 6px 0;
  border: 1px solid var(--site-navigation-line);
  background: var(--site-navigation-panel);
  box-shadow: 0 18px 42px rgba(21, 21, 21, 0.12);
  opacity: 0;
  pointer-events: none;
  transform: translateY(-6px);
  visibility: hidden;
  transition: opacity 160ms ease, transform 160ms ease, visibility 160ms ease;
}

.catalog-header[data-site-navigation-v4] .catalog-nav__knowledge.is-open .catalog-knowledge-menu {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
  visibility: visible;
}

.catalog-header[data-site-navigation-v4] .catalog-nav .catalog-knowledge-menu a {
  display: block;
  padding: 7px 14px;
  color: var(--site-navigation-ink);
  font-size: 13px;
  line-height: 1.45;
  white-space: normal;
}

.catalog-header[data-site-navigation-v4] .catalog-nav .catalog-knowledge-menu a::after {
  display: none;
}

.catalog-header[data-site-navigation-v4] .catalog-nav .catalog-knowledge-menu a:hover,
.catalog-header[data-site-navigation-v4] .catalog-nav .catalog-knowledge-menu a:focus-visible,
.catalog-header[data-site-navigation-v4] .catalog-nav .catalog-knowledge-menu a.is-current {
  background: var(--site-navigation-ink);
  color: #fff;
  outline: none;
}

.catalog-header[data-site-navigation-v4] .catalog-nav .catalog-knowledge-menu:has(a:hover) a.is-current:not(:hover),
.catalog-header[data-site-navigation-v4] .catalog-nav .catalog-knowledge-menu:has(a:focus-visible) a.is-current:not(:focus-visible) {
  background: transparent;
  color: var(--site-navigation-ink);
}

.catalog-header[data-site-navigation-v4] .catalog-header__actions {
  display: flex;
  align-items: center;
  gap: 22px;
}

.catalog-header[data-site-navigation-v4] .catalog-account {
  display: inline-flex;
  min-width: 44px;
  min-height: 44px;
  max-width: 220px;
  align-items: center;
  justify-content: center;
  text-align: center;
  font-size: 14px;
  line-height: 1.2;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.catalog-header[data-site-navigation-v4] .catalog-workbench {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  padding: 0 22px;
  border: 1px solid var(--site-navigation-ink);
  border-radius: 4px;
  background: var(--site-navigation-ink);
  color: #fff;
  font-size: 14px;
  font-weight: 700;
}

.catalog-header[data-site-navigation-v4] .catalog-menu,
.catalog-header[data-site-navigation-v4] .catalog-mobile-nav {
  display: none;
}

.catalog-header[data-site-navigation-v4] :is(a, button):focus-visible {
  outline: 2px solid var(--site-navigation-accent);
  outline-offset: 3px;
}

@media (max-width: 1023px) {
  .catalog-header[data-site-navigation-v4] .catalog-header__row {
    grid-template-columns: 156px minmax(0, 1fr) auto;
    gap: 18px;
  }

  .catalog-header[data-site-navigation-v4] .catalog-nav {
    gap: 18px;
  }

  .catalog-header[data-site-navigation-v4] .catalog-header__actions {
    gap: 12px;
  }
}

@media (max-width: 767px) {
  .catalog-header[data-site-navigation-v4] .catalog-shell {
    width: min(calc(100% - 32px), var(--site-navigation-max));
  }

  .catalog-header[data-site-navigation-v4] .catalog-header__row {
    grid-template-columns: minmax(0, 1fr) auto;
    min-height: 68px;
  }

  .catalog-header[data-site-navigation-v4] .catalog-brand {
    width: 148px;
  }

  .catalog-header[data-site-navigation-v4] .catalog-nav,
  .catalog-header[data-site-navigation-v4] .catalog-header__actions {
    display: none;
  }

  .catalog-header[data-site-navigation-v4] .catalog-menu {
    display: inline-flex;
    width: 44px;
    height: 44px;
    align-items: center;
    justify-content: center;
    border: 0;
    background: transparent;
    cursor: pointer;
  }

  .catalog-header[data-site-navigation-v4] .catalog-menu span,
  .catalog-header[data-site-navigation-v4] .catalog-menu span::before {
    display: block;
    width: 22px;
    height: 1px;
    background: var(--site-navigation-ink);
    content: "";
  }

  .catalog-header[data-site-navigation-v4] .catalog-menu span::before {
    transform: translateY(-7px);
  }

  .catalog-header[data-site-navigation-v4] .catalog-mobile-nav {
    border-top: 1px solid var(--site-navigation-line);
    border-bottom: 1px solid var(--site-navigation-line);
    background: var(--site-navigation-panel);
  }

  .catalog-header[data-site-navigation-v4] .catalog-mobile-nav.is-open,
  .catalog-header[data-site-navigation-v4] .catalog-mobile-nav.open {
    display: block;
  }

  .catalog-header[data-site-navigation-v4] .catalog-mobile-nav__inner {
    display: grid;
    padding-block: 10px 16px;
  }

  .catalog-header[data-site-navigation-v4] .catalog-mobile-nav a {
    display: flex;
    min-height: 44px;
    align-items: center;
    border-bottom: 1px solid var(--site-navigation-line);
    font-size: 15px;
  }

  .catalog-header[data-site-navigation-v4] .catalog-mobile-topic-group {
    border-bottom: 1px solid var(--site-navigation-line);
  }

  .catalog-header[data-site-navigation-v4] .catalog-mobile-topic-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: stretch;
  }

  .catalog-header[data-site-navigation-v4] .catalog-mobile-topic-row > a {
    border-bottom: 0;
  }

  .catalog-header[data-site-navigation-v4] .catalog-mobile-topic-toggle {
    min-width: 72px;
    border: 0;
    border-left: 1px solid var(--site-navigation-line);
    background: transparent;
    color: var(--site-navigation-muted);
    cursor: pointer;
    font-size: 13px;
  }

  .catalog-header[data-site-navigation-v4] .catalog-mobile-topic-toggle::after {
    margin-left: 7px;
    content: "+";
  }

  .catalog-header[data-site-navigation-v4] .catalog-mobile-topic-group.is-open .catalog-mobile-topic-toggle::after {
    content: "−";
  }

  .catalog-header[data-site-navigation-v4] .catalog-mobile-topic-toggle:focus-visible {
    outline-offset: -3px;
  }

  .catalog-header[data-site-navigation-v4] .catalog-mobile-topic-menu {
    display: grid;
    padding: 6px 0;
    border-top: 1px solid var(--site-navigation-line);
    background: #fff;
  }

  .catalog-header[data-site-navigation-v4] .catalog-mobile-topic-menu[hidden] {
    display: none;
  }

  .catalog-header[data-site-navigation-v4] .catalog-mobile-nav .catalog-mobile-topic-menu a {
    min-height: 40px;
    padding: 6px 14px;
    border-bottom: 0;
    color: var(--site-navigation-muted);
    font-size: 14px;
  }

  .catalog-header[data-site-navigation-v4] .catalog-mobile-nav .catalog-mobile-topic-menu a:hover,
  .catalog-header[data-site-navigation-v4] .catalog-mobile-nav .catalog-mobile-topic-menu a:focus-visible,
  .catalog-header[data-site-navigation-v4] .catalog-mobile-nav .catalog-mobile-topic-menu a.is-current {
    background: var(--site-navigation-ink);
    color: #fff;
    outline: none;
  }

  .catalog-header[data-site-navigation-v4] .catalog-mobile-nav .catalog-mobile-topic-menu:has(a:hover) a.is-current:not(:hover),
  .catalog-header[data-site-navigation-v4] .catalog-mobile-nav .catalog-mobile-topic-menu:has(a:focus-visible) a.is-current:not(:focus-visible) {
    background: transparent;
    color: var(--site-navigation-ink);
  }
}

@media (prefers-reduced-motion: reduce) {
  .catalog-header[data-site-navigation-v4] *,
  .catalog-header[data-site-navigation-v4] *::before,
  .catalog-header[data-site-navigation-v4] *::after {
    transition-duration: 0.01ms !important;
  }
}

.home-header-actions[data-home-navigation-actions] {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-left: auto;
}

.home-header-actions[data-home-navigation-actions] .home-header-login {
  display: none;
  color: #fff;
  font-size: 13px;
}

.home-header-actions[data-home-navigation-actions] .header-cta {
  margin-left: 0;
  border-radius: 4px;
}

.header .nav[data-home-navigation] {
  height: 100%;
}

.header .nav[data-home-navigation] .catalog-nav__knowledge {
  position: relative;
  display: flex;
  align-self: stretch;
  align-items: center;
}

.header .nav[data-home-navigation] .catalog-nav__knowledge > a {
  display: inline-flex;
  align-items: center;
}

.header .nav[data-home-navigation] .catalog-knowledge-menu {
  position: absolute;
  z-index: 40;
  top: calc(100% - 1px);
  left: -20px;
  width: 220px;
  padding: 6px 0;
  border: 1px solid #d7d8d5;
  background: #fff;
  box-shadow: 0 18px 42px rgba(21, 21, 21, 0.16);
  color: #151515;
  opacity: 0;
  pointer-events: none;
  transform: translateY(-6px);
  visibility: hidden;
  transition: opacity 160ms ease, transform 160ms ease, visibility 160ms ease;
}

.header .nav[data-home-navigation] .catalog-nav__knowledge.is-open .catalog-knowledge-menu {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
  visibility: visible;
}

.header .nav[data-home-navigation] .catalog-knowledge-menu a {
  display: block;
  padding: 7px 14px;
  color: #151515;
  font-size: 13px;
  line-height: 1.45;
  white-space: normal;
}

.header .nav[data-home-navigation] .catalog-knowledge-menu a::after {
  display: none;
}

.header .nav[data-home-navigation] .catalog-knowledge-menu a:hover,
.header .nav[data-home-navigation] .catalog-knowledge-menu a:focus-visible,
.header .nav[data-home-navigation] .catalog-knowledge-menu a.is-current {
  background: #151515;
  color: #fff;
  outline: none;
}

.header .nav[data-home-navigation] .catalog-knowledge-menu:has(a:hover) a.is-current:not(:hover),
.header .nav[data-home-navigation] .catalog-knowledge-menu:has(a:focus-visible) a.is-current:not(:focus-visible) {
  background: transparent;
  color: #151515;
}

.header .mobile-nav-inner[data-home-navigation] .catalog-mobile-topic-group {
  border-bottom: 1px solid #d7d8d5;
}

.header .mobile-nav-inner[data-home-navigation] .catalog-mobile-topic-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: stretch;
}

.header .mobile-nav-inner[data-home-navigation] .catalog-mobile-topic-row > a {
  display: flex;
  align-items: center;
}

.header .mobile-nav-inner[data-home-navigation] .catalog-mobile-topic-toggle {
  min-width: 72px;
  border: 0;
  border-left: 1px solid #d7d8d5;
  background: transparent;
  color: #62676f;
  cursor: pointer;
  font-size: 13px;
}

.header .mobile-nav-inner[data-home-navigation] .catalog-mobile-topic-toggle::after {
  margin-left: 7px;
  content: "+";
}

.header .mobile-nav-inner[data-home-navigation] .catalog-mobile-topic-group.is-open .catalog-mobile-topic-toggle::after {
  content: "−";
}

.header .mobile-nav-inner[data-home-navigation] .catalog-mobile-topic-menu {
  display: grid;
  padding: 6px 0;
  border-top: 1px solid #d7d8d5;
  background: #fff;
}

.header .mobile-nav-inner[data-home-navigation] .catalog-mobile-topic-menu[hidden] {
  display: none;
}

.header .mobile-nav-inner[data-home-navigation] .catalog-mobile-topic-menu a {
  min-height: 40px;
  padding: 6px 14px;
  color: #62676f;
  font-size: 15px;
  letter-spacing: normal;
}

.header .mobile-nav-inner[data-home-navigation] .catalog-mobile-topic-menu a:hover,
.header .mobile-nav-inner[data-home-navigation] .catalog-mobile-topic-menu a:focus-visible,
.header .mobile-nav-inner[data-home-navigation] .catalog-mobile-topic-menu a.is-current {
  background: #151515;
  color: #fff;
  outline: none;
}

.header .mobile-nav.open:has(.mobile-nav-inner[data-home-navigation]) {
  max-height: calc(100dvh - 76px);
  overflow-y: auto;
}

@media (min-width: 810px) {
  .home-header-actions[data-home-navigation-actions] .home-header-login {
    display: inline-flex;
  }
}

/* Shared knowledge navigation; independent of catalog or encyclopedia content. */
.knowledge-nav-disclosure { display: inline-flex; position: relative; align-items: center; gap: 0; }
.knowledge-nav-disclosure > a { position: relative; display: inline-flex; align-items: center; min-height: 44px; padding-block: 0; white-space: nowrap; font-size: 14px; }
.knowledge-nav-disclosure > a::after { position: absolute; right: 0; bottom: 3px; left: 0; height: 1px; background: currentColor; content: ""; opacity: 0; }
.knowledge-nav-disclosure > a:is(:hover, .is-current)::after { opacity: 1; }
.knowledge-nav-disclosure__toggle { display: inline-flex; align-items: center; justify-content: center; width: 44px; min-width: 44px; min-height: 44px; padding: 0; border: 0; border-radius: 4px; background: transparent; color: inherit; font: inherit; cursor: pointer; }
.knowledge-nav-disclosure__toggle:hover { background: rgba(21, 21, 21, 0.05); }
.knowledge-nav-disclosure__toggle svg { transition: transform 140ms ease; }
.knowledge-nav-disclosure__toggle[aria-expanded="true"] svg { transform: rotate(180deg); }
.knowledge-nav-disclosure__menu { position: absolute; top: calc(100% + 8px); left: -12px; z-index: 100; min-width: 180px; padding: 6px; border: 1px solid #d7d8d5; border-radius: 6px; background: #fff; color: #151515; box-shadow: 0 10px 28px #00000012; }
.knowledge-nav-disclosure .knowledge-nav-disclosure__menu > a { position: relative; display: flex; min-height: 44px; padding: 10px 12px; border: 0; border-radius: 3px; align-items: center; color: #151515; font-size: 14px; font-weight: 400; line-height: 1.5; white-space: nowrap; text-decoration: none; }
/* Legacy catalog descendants inherit a top-level underline unless reset here. */
.knowledge-nav-disclosure .knowledge-nav-disclosure__menu > a::before,
.knowledge-nav-disclosure .knowledge-nav-disclosure__menu > a::after { display: none; content: none; }
.knowledge-nav-disclosure .knowledge-nav-disclosure__menu > a:hover { background: #f1f2ef; }
.knowledge-nav-disclosure .knowledge-nav-disclosure__menu > a.is-current { background: #151515; color: #fff; }
.knowledge-nav-disclosure :focus-visible, .knowledge-sections :focus-visible, .knowledge-topics :focus-visible { outline: 2px solid #2b6bff; outline-offset: 3px; }
.knowledge-nav-disclosure__menu[hidden], .knowledge-round4-page [hidden] { display: none !important; }
.knowledge-sections { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin: 0 0 24px; padding: 0; }
.knowledge-sections a { display: inline-flex; align-items: center; justify-content: center; min-height: 44px; padding: 8px 16px; border: 1px solid #d7d8d5; border-radius: 24px; background: #fff; color: #151515; text-decoration: none; font-size: 14px; font-weight: 400; line-height: 1.5; }
.knowledge-sections a:hover { border-color: #151515; background: #f1f2ef; }
.knowledge-sections a.is-current { background: #151515; color: #fff; border-color: #151515; }
.courses-sales-page .courses-page__header { position: relative; }
.courses-sales-page .knowledge-section-navigation { padding-top: 24px; }
.courses-sales-page .knowledge-section-navigation > .knowledge-sections { margin-bottom: 0; }
.courses-sales-page .knowledge-section-navigation + .course-sales-hero { padding-top: 40px; }
@media (max-width: 639px) {
  .courses-sales-page .knowledge-section-navigation + .course-sales-hero { padding-top: 28px; }
}
html[data-knowledge-navigation-v2] .round4-knowledge-layout { display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: 32px; align-items: start; }
.knowledge-topics { min-width: 0; position: sticky; top: 100px; }
.knowledge-topics h2 { font-size: 13px; font-weight: 600; color: #62676f; margin: 0 0 10px; }
.knowledge-topics__list { display: grid; gap: 4px; }
.knowledge-topics__list button { display: flex; min-height: 44px; align-items: center; justify-content: space-between; gap: 8px; width: 100%; padding: 10px 12px; border: 0; border-radius: 4px; text-align: left; background: transparent; color: #151515; font: inherit; font-size: 14px; cursor: pointer; }
.knowledge-topics__list button span:last-child { color: #777; font-size: 12px; }
.knowledge-topics__list button[aria-pressed="true"] { background: #eceeea; box-shadow: inset 3px 0 #2b6bff; }
.knowledge-topics__mobile { display: none; }
html[data-knowledge-navigation-v2] .round4-results { min-width: 0; margin: 0; }
html[data-knowledge-navigation-v2] .round4-index-toolbar { grid-template-columns: minmax(0, 1fr) minmax(100px, 140px) minmax(100px, 130px); }
html[data-knowledge-navigation-v2] .resource-catalog-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.knowledge-map-view { margin: 8px 0 40px; }
html[data-knowledge-navigation-v2] .knowledge-map-view .round4-map-section { display: block; width: auto; padding: 0; margin: 0; }
html[data-knowledge-navigation-v2] .knowledge-map-view .knowledge-map { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 20px; padding: 0; max-height: none; }
html[data-knowledge-navigation-v2] .knowledge-map-view .knowledge-map__stage { display: block; min-width: 0; padding: 16px; background: #f5f6f2; border: 1px solid #dedfdc; }
html[data-knowledge-navigation-v2] .knowledge-map-view .knowledge-map__nodes { display: grid; gap: 12px; }
html[data-knowledge-navigation-v2] .knowledge-map-view .knowledge-map__node { min-height: 68px; padding: 12px; }
.knowledge-map-view .knowledge-map__track { display: none; }
.knowledge-load-error { padding: 16px; border-left: 3px solid #b65e20; background: #fff8ee; margin: 12px 0; }
.knowledge-result-count { color: #62676f; font-size: 13px; margin: 12px 0; }
@media (max-width: 1023px) {
  html[data-knowledge-navigation-v2] .round4-knowledge-layout { display: block; }
  .knowledge-topics { position: static; margin-bottom: 18px; }
  .knowledge-topics h2, .knowledge-topics__list { display: none; }
  .knowledge-topics__mobile { display: block; }
  .knowledge-topics__mobile summary { display: inline-flex; align-items: center; min-height: 44px; padding: 8px 14px; border: 1px solid #d7d8d5; border-radius: 4px; cursor: pointer; }
  .knowledge-topics__mobile select { display: block; min-height: 44px; width: 100%; margin-top: 8px; padding: 8px; border: 1px solid #d7d8d5; background: #fff; font: inherit; }
  html[data-knowledge-navigation-v2] .knowledge-map-view .knowledge-map { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .catalog-mobile-nav__inner .knowledge-nav-disclosure, .mobile-nav-inner .knowledge-nav-disclosure { display: grid; grid-template-columns: minmax(0, 1fr) 44px; width: 100%; }
  .catalog-mobile-nav__inner .knowledge-nav-disclosure__menu, .mobile-nav-inner .knowledge-nav-disclosure__menu { position: static; grid-column: 1 / -1; min-width: 0; margin: 4px 0 10px; box-shadow: none; }
}
@media (max-width: 639px) {
  html[data-knowledge-navigation-v2] .round4-index-toolbar { grid-template-columns: minmax(0, 1fr); }
  html[data-knowledge-navigation-v2] .resource-catalog-grid, html[data-knowledge-navigation-v2] .knowledge-map-view .knowledge-map { grid-template-columns: minmax(0, 1fr); }
  .knowledge-sections { gap: 6px; }
  .knowledge-sections a { padding-inline: 12px; font-size: 13px; }
}

@media (max-width: 1023px) {
  .catalog-mobile-nav__inner .knowledge-nav-disclosure > a,
  .mobile-nav-inner .knowledge-nav-disclosure > a { padding-block: 10px; border-bottom: 0; }
  .catalog-mobile-nav__inner .knowledge-nav-disclosure > a::after,
  .mobile-nav-inner .knowledge-nav-disclosure > a::after { display: none; content: none; }
  .catalog-mobile-nav__inner .knowledge-nav-disclosure__toggle,
  .mobile-nav-inner .knowledge-nav-disclosure__toggle { width: 44px; min-width: 44px; }
  .catalog-header[data-site-navigation-v4] .catalog-mobile-nav .knowledge-nav-disclosure__menu a { border-bottom: 0; }
}
@media (prefers-reduced-motion: reduce) {
  .knowledge-nav-disclosure__toggle svg { transition: none; }
}

/* Common UI corrections, following the site's existing typography and palette. */
.catalog-header[data-site-navigation-v4] .catalog-header__row { grid-template-columns:162px minmax(0,1fr) auto; gap:24px; }
.catalog-header[data-site-navigation-v4] .catalog-nav { gap:18px; }
.catalog-header[data-site-navigation-v4] .catalog-header__actions { gap:16px; min-width:0; }
.catalog-header[data-site-navigation-v4] .catalog-account { max-width:160px; }
.catalog-header[data-site-navigation-v4] .public-pro-link, .home-header-actions .public-pro-link { display:inline-flex; align-items:center; min-height:44px; white-space:nowrap; font-size:14px; text-decoration:none; }
.catalog-header[data-site-navigation-v4] .catalog-brand { flex-shrink:0; }
.catalog-header[data-site-navigation-v4] :focus-visible { outline:2px solid #1552cc; outline-offset:3px; }
.encyclopedia-site-context { width:min(1240px,calc(100% - 48px)); margin:14px auto; display:flex; align-items:center; justify-content:space-between; gap:16px; font:14px/1.6 "PingFang SC","Microsoft YaHei",sans-serif; }
.encyclopedia-site-context a { color:#1552cc; }
.encyclopedia-site-context .header-search { min-height:44px; }
.closeout-catalog-status { margin-top:20px; font-size:14px; }
.closeout-catalog-status button { padding:10px 14px; background:white; color:#1552cc; border:1px solid #aebbd1; border-radius:4px; font:inherit; cursor:pointer; }
.knowledge-load-error button { min-height:44px; padding:8px 14px; border:1px solid currentColor; background:white; color:#1552cc; font:inherit; cursor:pointer; }
.site-footer-v3 .site-footer-v3__social { flex-wrap:wrap; row-gap:12px; }
.site-footer-v3 .site-footer-v3__brand, .site-footer-v3 .site-footer-v3__group { min-width:0; }
@media(max-width:1199px) {
  .catalog-header[data-site-navigation-v4] .catalog-header__row { display:flex; justify-content:space-between; min-height:70px; gap:16px; }
  .catalog-header[data-site-navigation-v4] .catalog-nav, .catalog-header[data-site-navigation-v4] .catalog-header__actions { display:none; }
  .catalog-header[data-site-navigation-v4] .catalog-brand { width:156px; }
  .catalog-header[data-site-navigation-v4] .catalog-menu { display:inline-flex; align-items:center; justify-content:center; min-height:44px; min-width:44px; border:1px solid #d7d8d5; background:transparent; cursor:pointer; }
  .catalog-header[data-site-navigation-v4] .catalog-menu span { position:relative; width:20px; height:1px; background:#151515; }
  .catalog-header[data-site-navigation-v4] .catalog-menu span::before { content:""; position:absolute; left:0; top:-6px; width:20px; height:1px; background:#151515; }
  .catalog-header[data-site-navigation-v4] .catalog-mobile-nav { display:none; background:#fff; border-top:1px solid #d7d8d5; }
  .catalog-header[data-site-navigation-v4] .catalog-mobile-nav.open { display:block; }
  .catalog-header[data-site-navigation-v4] .catalog-mobile-nav__inner { display:grid; padding-block:10px 16px; }
  .catalog-header[data-site-navigation-v4] .catalog-mobile-nav a { display:flex; align-items:center; min-height:44px; padding-block:9px; border-bottom:1px solid #d7d8d5; }
  .catalog-mobile-nav .knowledge-nav-disclosure { display:flex; flex-wrap:wrap; }
  .catalog-mobile-nav .knowledge-nav-disclosure > a { flex:1; }
  .catalog-mobile-nav .knowledge-nav-disclosure__menu { position:static; width:100%; }
  .home-redesign-header .nav[data-home-navigation], .home-redesign-header .home-header-actions { display:none; }
  .home-redesign-header .menu-toggle { display:flex; margin-left:auto; }
  .home-redesign-header .header-row { display:flex; justify-content:space-between; }
  .home-redesign-header .mobile-nav { gap:0; padding:12px 28px 16px; }
  .home-redesign-header .mobile-nav a { font-size:16px; line-height:1.5; min-height:44px; padding:10px 0; margin:0; }
  .home-redesign-header .mobile-nav .knowledge-nav-disclosure > a { font-size:16px; }
}
@media(max-width:420px) { .catalog-header[data-site-navigation-v4] .catalog-shell { width:calc(100% - 32px); } .encyclopedia-site-context { width:calc(100% - 32px); } }