/*
 * PUXIN shared brand shell
 *
 * This file is deliberately opt-in. It does not style global elements or
 * legacy utility names such as logo, nav-menu, btn, card, or panel.
 * Pages adopt it by adding the .puxin-brandbar* / .puxin-brandchip* /
 * .puxin-ui-* classes to their existing static DOM.
 */

.puxin-brandbar,
.puxin-brandchip,
.puxin-ui-button,
.puxin-ui-card,
.puxin-ui-chip {
  box-sizing: border-box;
}

.puxin-brandbar *,
.puxin-brandchip *,
.puxin-ui-button *,
.puxin-ui-card *,
.puxin-ui-chip * {
  box-sizing: border-box;
}

/* --------------------------------------------------------------------------
   Brand bar tokens and shell
   -------------------------------------------------------------------------- */

.puxin-brandbar,
.puxin-brandchip {
  --puxin-brandbar-ink: #0c1827;
  --puxin-brandbar-text: #1e2935;
  --puxin-brandbar-muted: #697581;
  --puxin-brandbar-paper: #ffffff;
  --puxin-brandbar-hover: #eef1f3;
  --puxin-brandbar-line: rgba(60, 60, 67, .16);
  --puxin-brandbar-cyan: #21c7f3;
  --puxin-brandbar-red: #ed1c24;
  --puxin-brandbar-yellow: #ffc900;
  --puxin-brandbar-radius-small: 8px;
  --puxin-brandbar-radius-medium: 12px;
  --puxin-brandbar-radius-large: 18px;
  --puxin-brandbar-radius-pill: 999px;
  --puxin-brandbar-shadow-low: 0 5px 18px rgba(15, 28, 42, .045);
  --puxin-brandbar-shadow-card: 0 8px 25px rgba(15, 28, 42, .07);
  --puxin-brandbar-shadow-float: 0 18px 44px rgba(15, 23, 42, .12);
  --puxin-brandbar-focus: 0 0 0 3px rgba(33, 199, 243, .34);
  --puxin-brandbar-font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}

.puxin-brandbar {
  position: sticky;
  top: 0;
  z-index: var(--puxin-brandbar-z, 1000);
  width: 100%;
  height: auto;
  min-width: 0;
  margin: 0;
  padding: 0;
  display: block;
  overflow: visible;
  border-bottom: 1px solid rgba(12, 24, 39, .10);
  background: rgba(255, 255, 255, .94);
  box-shadow: var(--puxin-brandbar-shadow-low);
  backdrop-filter: saturate(160%) blur(18px);
  -webkit-backdrop-filter: saturate(160%) blur(18px);
  color: var(--puxin-brandbar-text);
  font-family: var(--puxin-brandbar-font);
}

.puxin-brandbar__inner {
  position: relative;
  width: min(100%, var(--puxin-brandbar-shell-width, 1440px));
  max-width: none;
  height: auto;
  min-height: 76px;
  margin: 0 auto;
  padding: 0 clamp(22px, 3vw, 46px);
  display: grid;
  grid-template-columns: auto minmax(420px, 1fr) auto;
  grid-template-areas: "brand menu actions";
  align-items: center;
  gap: clamp(24px, 3.4vw, 54px);
  border: 0;
  background: transparent;
  box-shadow: none;
}

.puxin-brandbar__brand {
  grid-area: brand;
  min-width: 246px;
  display: inline-flex;
  align-items: center;
  gap: 11px;
  color: var(--puxin-brandbar-ink);
  text-decoration: none;
  transition: opacity .2s ease;
}

.puxin-brandbar__brand:hover {
  opacity: .84;
}

.puxin-brandbar__brand:focus-visible,
.puxin-brandbar__link:focus-visible,
.puxin-brandbar__search:focus-visible,
.puxin-brandbar__cta:focus-visible,
.puxin-brandbar__role:focus-visible,
.puxin-brandbar__toggle:focus-visible,
.puxin-brandchip:focus-visible,
.puxin-ui-button:focus-visible,
.puxin-ui-card--interactive:focus-visible,
.puxin-ui-chip:focus-visible {
  outline: 0;
  box-shadow: var(--puxin-brandbar-focus, 0 0 0 3px rgba(33, 199, 243, .34));
}

.puxin-brandbar__mark {
  position: relative;
  width: 50px;
  height: 50px;
  flex: 0 0 50px;
  overflow: hidden;
  border: 1px solid rgba(60, 60, 67, .18);
  border-radius: 13px;
  background: var(--puxin-brandbar-paper);
  box-shadow: 0 3px 9px rgba(15, 28, 42, .10);
}

/*
 * Logo contract: the supplied logo artwork is immutable. Always show the
 * complete square artwork with contain; never crop, tint, filter, or redraw it.
 */
.puxin-brandbar__mark-image,
.puxin-brandbar__mark > img {
  position: absolute;
  inset: 2px;
  width: calc(100% - 4px);
  height: calc(100% - 4px);
  max-width: none;
  object-fit: contain;
  object-position: center;
  filter: none;
  transform: none;
}

.puxin-brandbar__copy {
  min-width: 0;
  display: grid;
  gap: 2px;
}

.puxin-brandbar__title,
.puxin-brandbar__copy > strong {
  overflow: hidden;
  color: var(--puxin-brandbar-ink);
  font-size: 18px;
  font-weight: 820;
  line-height: 1.16;
  letter-spacing: .035em;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.puxin-brandbar__subtitle,
.puxin-brandbar__copy > small {
  overflow: hidden;
  color: var(--puxin-brandbar-muted);
  font-size: 9px;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: .08em;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.puxin-brandbar__nav {
  position: static;
  inset: auto;
  grid-area: menu;
  align-self: stretch;
  min-width: 0;
  display: flex;
  align-items: stretch;
  justify-content: center;
  gap: clamp(17px, 1.8vw, 29px);
  margin: 0;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
  visibility: visible;
  opacity: 1;
  pointer-events: auto;
  transform: none;
  overflow: visible;
  list-style: none;
}

.puxin-brandbar__nav-item,
.puxin-brandbar__nav > li {
  min-width: 0;
  display: flex;
  align-items: stretch;
}

.puxin-brandbar__link {
  position: relative;
  min-width: 0;
  display: inline-flex;
  align-items: center;
  padding: 0 2px;
  border-radius: 0;
  color: var(--puxin-brandbar-text);
  background: transparent;
  font-size: 13px;
  font-weight: 680;
  line-height: 1;
  text-decoration: none;
  white-space: nowrap;
  transition: color .2s ease;
}

.puxin-brandbar__link-icon,
.puxin-brandbar__link > span {
  display: none;
}

.puxin-brandbar__link::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 12px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--puxin-brandbar-cyan);
  opacity: 0;
  transform: translate(-50%, 5px);
  transition: opacity .2s ease, transform .2s ease;
}

.puxin-brandbar__link:hover,
.puxin-brandbar__link--active,
.puxin-brandbar__link[aria-current="page"] {
  color: #000b17;
  background: transparent;
}

.puxin-brandbar__link:hover::after,
.puxin-brandbar__link--active::after,
.puxin-brandbar__link[aria-current="page"]::after {
  opacity: 1;
  transform: translate(-50%, 0);
}

.puxin-brandbar__actions {
  grid-area: actions;
  min-width: 0;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 12px;
  margin: 0;
  padding: 0;
}

.puxin-brandbar__search {
  width: 38px;
  height: 38px;
  flex: 0 0 38px;
  display: inline-grid;
  place-items: center;
  border-radius: 9px;
  color: #253241;
  text-decoration: none;
  transition: color .2s ease, background .2s ease;
}

.puxin-brandbar__search:hover {
  color: #000b17;
  background: var(--puxin-brandbar-hover);
}

.puxin-brandbar__search-icon,
.puxin-brandbar__search > svg {
  width: 20px;
  height: 20px;
  display: block;
}

.puxin-brandbar__divider {
  width: 1px;
  height: 23px;
  flex: 0 0 1px;
  background: var(--puxin-brandbar-line);
}

.puxin-brandbar__cta,
.puxin-brandbar__role {
  min-height: 39px;
  padding: 0 17px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--puxin-brandbar-ink);
  border-radius: 7px;
  color: #ffffff;
  background: var(--puxin-brandbar-ink);
  box-shadow: 0 5px 13px rgba(12, 24, 39, .16);
  font-size: 13px;
  font-weight: 700;
  line-height: 1;
  text-decoration: none;
  white-space: nowrap;
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}

.puxin-brandbar__cta:hover,
.puxin-brandbar__role:hover {
  color: #ffffff;
  background: #17283a;
  box-shadow: 0 9px 20px rgba(12, 24, 39, .20);
  transform: translateY(-1px);
}

.puxin-brandbar__toggle {
  position: static;
  inset: auto;
  grid-area: toggle;
  width: 42px;
  height: 42px;
  display: none;
  flex: 0 0 42px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  padding: 0;
  margin: 0;
  border: 1px solid var(--puxin-brandbar-line);
  border-radius: 9px;
  color: #253241;
  background: var(--puxin-brandbar-paper);
  font: inherit;
  cursor: pointer;
}

.puxin-brandbar__toggle-line,
.puxin-brandbar__toggle > span {
  width: 20px;
  height: 2px;
  display: block;
  border-radius: 2px;
  background: currentColor;
  transform-origin: center;
  transition: opacity .2s ease, transform .2s ease;
}

.puxin-brandbar__toggle[aria-expanded="true"] .puxin-brandbar__toggle-line:first-child,
.puxin-brandbar__toggle[aria-expanded="true"] > span:first-child {
  transform: translateY(7px) rotate(45deg);
}

.puxin-brandbar__toggle[aria-expanded="true"] .puxin-brandbar__toggle-line:nth-child(2),
.puxin-brandbar__toggle[aria-expanded="true"] > span:nth-child(2) {
  opacity: 0;
}

.puxin-brandbar__toggle[aria-expanded="true"] .puxin-brandbar__toggle-line:last-child,
.puxin-brandbar__toggle[aria-expanded="true"] > span:last-child {
  transform: translateY(-7px) rotate(-45deg);
}

.puxin-brandbar__mobile-only,
.puxin-brandbar__mobile-role,
.puxin-brandbar__nav > .puxin-brandbar__mobile-role {
  display: none;
}

/* --------------------------------------------------------------------------
   Compact brand chip for immersive or fixed-height application shells
   -------------------------------------------------------------------------- */

.puxin-brandchip {
  min-height: 44px;
  max-width: min(280px, calc(100vw - 24px));
  padding: 4px 11px 4px 4px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  overflow: hidden;
  border: 1px solid var(--puxin-brandbar-line);
  border-radius: var(--puxin-brandbar-radius-medium);
  color: var(--puxin-brandbar-ink);
  background: rgba(255, 255, 255, .94);
  box-shadow: var(--puxin-brandbar-shadow-card);
  font-family: var(--puxin-brandbar-font);
  text-decoration: none;
  backdrop-filter: saturate(150%) blur(14px);
  -webkit-backdrop-filter: saturate(150%) blur(14px);
  transition: transform .2s ease, box-shadow .2s ease;
}

.puxin-brandchip:hover {
  box-shadow: var(--puxin-brandbar-shadow-float);
  transform: translateY(-1px);
}

.puxin-brandchip--fixed {
  position: fixed;
  top: max(12px, env(safe-area-inset-top));
  left: max(12px, env(safe-area-inset-left));
  z-index: var(--puxin-brandchip-z, 2101);
}

.puxin-brandchip--dark {
  border-color: rgba(255, 255, 255, .18);
  color: #ffffff;
  background: rgba(5, 13, 20, .86);
  box-shadow: 0 8px 28px rgba(0, 0, 0, .24);
}

.puxin-brandchip__mark {
  position: relative;
  width: 34px;
  height: 34px;
  flex: 0 0 34px;
  overflow: hidden;
  border: 1px solid rgba(60, 60, 67, .16);
  border-radius: 9px;
  background: #ffffff;
}

.puxin-brandchip__mark-image {
  position: absolute;
  inset: 2px;
  width: calc(100% - 4px);
  height: calc(100% - 4px);
  max-width: none;
  object-fit: contain;
  object-position: center;
  filter: none;
  transform: none;
}

.puxin-brandchip__copy {
  min-width: 0;
  display: grid;
  gap: 1px;
  overflow: hidden;
  text-align: left;
  line-height: 1.08;
}

.puxin-brandchip__copy strong,
.puxin-brandchip__copy small {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.puxin-brandchip__copy strong {
  color: currentColor;
  font-size: 11px;
  font-weight: 820;
  letter-spacing: .045em;
}

.puxin-brandchip__copy small {
  color: var(--puxin-brandbar-muted);
  font-size: 7.5px;
  font-weight: 680;
  letter-spacing: .04em;
}

.puxin-brandchip--dark .puxin-brandchip__copy small {
  color: rgba(255, 255, 255, .7);
}

/* --------------------------------------------------------------------------
   Optional UI primitives. These affect only explicitly opted-in elements.
   Pages can theme them with --puxin-ui-* custom properties on any ancestor.
   -------------------------------------------------------------------------- */

.puxin-ui-button {
  min-height: 40px;
  padding: 0 16px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 1px solid var(--puxin-ui-line, rgba(60, 60, 67, .16));
  border-radius: var(--puxin-ui-radius, 8px);
  color: var(--puxin-ui-ink, #0c1827);
  background: var(--puxin-ui-paper, #ffffff);
  box-shadow: none;
  font-family: var(--puxin-ui-font, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif);
  font-size: 13px;
  font-weight: 700;
  line-height: 1;
  text-align: center;
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;
  transition: color .2s ease, background .2s ease, border-color .2s ease,
    box-shadow .2s ease, transform .2s ease;
}

.puxin-ui-button--primary {
  border-color: var(--puxin-ui-accent, #0c1827);
  color: var(--puxin-ui-on-accent, #ffffff);
  background: var(--puxin-ui-accent, #0c1827);
  box-shadow: 0 5px 13px rgba(12, 24, 39, .16);
}

.puxin-ui-button--secondary {
  border-color: var(--puxin-ui-line-strong, rgba(12, 24, 39, .24));
  color: var(--puxin-ui-ink, #0c1827);
  background: var(--puxin-ui-paper, #ffffff);
}

.puxin-ui-button--ghost {
  border-color: transparent;
  color: var(--puxin-ui-ink, #0c1827);
  background: transparent;
}

.puxin-ui-button--icon {
  width: 40px;
  padding: 0;
  flex: 0 0 40px;
}

.puxin-ui-button[disabled],
.puxin-ui-button[aria-disabled="true"] {
  opacity: .48;
  pointer-events: none;
  cursor: not-allowed;
}

.puxin-ui-card {
  display: block;
  min-width: 0;
  overflow: hidden;
  border: 1px solid var(--puxin-ui-line, rgba(60, 60, 67, .16));
  border-radius: var(--puxin-ui-card-radius, 18px);
  color: var(--puxin-ui-ink, #1e2935);
  background: var(--puxin-ui-paper, #ffffff);
  box-shadow: var(--puxin-ui-card-shadow, 0 8px 25px rgba(15, 28, 42, .07));
}

.puxin-ui-card--flat {
  box-shadow: none;
}

.puxin-ui-card--feature {
  border-radius: var(--puxin-ui-feature-radius, 22px);
  box-shadow: var(--puxin-ui-feature-shadow, 0 18px 44px rgba(15, 23, 42, .12));
}

.puxin-ui-card--interactive {
  color: var(--puxin-ui-ink, #1e2935);
  text-decoration: none;
  transition: border-color .2s ease, box-shadow .2s ease, transform .2s ease;
}

.puxin-ui-chip {
  min-height: 28px;
  max-width: 100%;
  padding: 0 10px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  overflow: hidden;
  border: 1px solid var(--puxin-ui-line, rgba(60, 60, 67, .16));
  border-radius: 999px;
  color: var(--puxin-ui-muted, #697581);
  background: var(--puxin-ui-paper, #ffffff);
  font-family: var(--puxin-ui-font, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif);
  font-size: 11px;
  font-weight: 700;
  line-height: 1;
  text-decoration: none;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.puxin-ui-chip--accent {
  border-color: color-mix(in srgb, var(--puxin-ui-accent, #21c7f3) 34%, transparent);
  color: var(--puxin-ui-accent-text, #075c73);
  background: color-mix(in srgb, var(--puxin-ui-accent, #21c7f3) 10%, #ffffff);
}

.puxin-ui-chip--dark {
  border-color: var(--puxin-ui-ink, #0c1827);
  color: #ffffff;
  background: var(--puxin-ui-ink, #0c1827);
}

@media (hover: hover) {
  .puxin-ui-button:hover {
    border-color: var(--puxin-ui-line-strong, rgba(12, 24, 39, .28));
    background: var(--puxin-ui-hover, #eef1f3);
    transform: translateY(-1px);
  }

  .puxin-ui-button--primary:hover {
    border-color: var(--puxin-ui-accent-hover, #17283a);
    color: var(--puxin-ui-on-accent, #ffffff);
    background: var(--puxin-ui-accent-hover, #17283a);
    box-shadow: 0 9px 20px rgba(12, 24, 39, .20);
  }

  .puxin-ui-button--ghost:hover {
    border-color: transparent;
  }

  .puxin-ui-card--interactive:hover {
    border-color: var(--puxin-ui-line-strong, rgba(12, 24, 39, .28));
    box-shadow: var(--puxin-ui-feature-shadow, 0 18px 44px rgba(15, 23, 42, .12));
    transform: translateY(-2px);
  }
}

/* --------------------------------------------------------------------------
   Brand bar responsive contract
   -------------------------------------------------------------------------- */

@media (max-width: 1120px) {
  .puxin-brandbar__inner {
    min-height: 70px;
    grid-template-columns: auto 1fr auto;
    grid-template-areas: "brand actions toggle";
    gap: 14px;
  }

  .puxin-brandbar__actions {
    justify-self: end;
  }

  .puxin-brandbar__toggle {
    display: flex;
  }

  .puxin-brandbar__nav {
    position: absolute;
    top: calc(100% + 1px);
    left: 22px;
    right: 22px;
    z-index: 10;
    max-height: calc(100vh - 70px);
    padding: 10px;
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 6px;
    overflow-y: auto;
    border: 1px solid var(--puxin-brandbar-line);
    border-radius: var(--puxin-brandbar-radius-medium);
    background: rgba(255, 255, 255, .98);
    box-shadow: var(--puxin-brandbar-shadow-float);
    visibility: hidden;
    opacity: 0;
    pointer-events: none;
    transform: translateY(-8px);
    transition: opacity .2s ease, transform .2s ease, visibility .2s ease;
    overscroll-behavior: contain;
  }

  .puxin-brandbar__nav--open {
    visibility: visible;
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
  }

  .puxin-brandbar__nav-item,
  .puxin-brandbar__nav > li,
  .puxin-brandbar__link {
    width: 100%;
  }

  .puxin-brandbar__link {
    min-height: 44px;
    justify-content: center;
    padding: 0 12px;
    border-radius: 7px;
    background: #f7f8f9;
  }

  .puxin-brandbar__link::after {
    bottom: 5px;
  }
}

@media (max-width: 768px) {
  .puxin-brandbar__inner {
    min-height: 70px;
    padding-inline: 16px;
    grid-template-columns: minmax(0, 1fr) auto;
    grid-template-areas: "brand toggle";
    gap: 10px;
  }

  .puxin-brandbar__brand {
    min-width: 0;
    gap: 8px;
  }

  .puxin-brandbar__mark {
    width: 44px;
    height: 44px;
    flex-basis: 44px;
    border-radius: 11px;
  }

  .puxin-brandbar__mark-image {
    width: calc(100% - 4px);
    height: calc(100% - 4px);
  }

  .puxin-brandbar__title,
  .puxin-brandbar__copy > strong {
    max-width: 180px;
    font-size: 15px;
  }

  .puxin-brandbar__subtitle,
  .puxin-brandbar__copy > small {
    display: block;
    font-size: 7.5px;
    letter-spacing: .055em;
  }

  .puxin-brandbar__actions {
    display: none;
  }

  .puxin-brandbar__nav {
    left: 16px;
    right: 16px;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .puxin-brandbar__mobile-only,
  .puxin-brandbar__mobile-role,
  .puxin-brandbar__nav > .puxin-brandbar__mobile-role {
    display: block;
    grid-column: 1 / -1;
  }

  .puxin-brandbar__link--mobile-cta,
  .puxin-brandbar__mobile-role .puxin-brandbar__link {
    color: #ffffff;
    border: 1px solid var(--puxin-brandbar-ink);
    background: var(--puxin-brandbar-ink);
  }

  .puxin-brandbar__link--mobile-cta:hover,
  .puxin-brandbar__link--mobile-cta[aria-current="page"],
  .puxin-brandbar__mobile-role .puxin-brandbar__link:hover {
    color: #ffffff;
    background: #17283a;
  }

  .puxin-ui-button {
    min-height: 44px;
  }

  .puxin-ui-button--icon {
    width: 44px;
    flex-basis: 44px;
  }
}

@media (max-width: 480px) {
  .puxin-brandbar__inner {
    padding-inline: 12px;
  }

  .puxin-brandbar__title,
  .puxin-brandbar__copy > strong {
    max-width: 168px;
  }

  .puxin-brandbar__nav {
    left: 12px;
    right: 12px;
    grid-template-columns: 1fr;
  }

  .puxin-brandbar__mobile-only,
  .puxin-brandbar__mobile-role,
  .puxin-brandbar__nav > .puxin-brandbar__mobile-role {
    grid-column: auto;
  }

  .puxin-brandchip__copy {
    max-width: 128px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .puxin-brandbar__brand,
  .puxin-brandbar__link,
  .puxin-brandbar__link::after,
  .puxin-brandbar__search,
  .puxin-brandbar__cta,
  .puxin-brandbar__role,
  .puxin-brandbar__toggle-line,
  .puxin-brandbar__nav,
  .puxin-brandchip,
  .puxin-ui-button,
  .puxin-ui-card--interactive {
    transition-duration: 0.001ms;
  }
}

/* --------------------------------------------------------------------------
   Adaptive page identity

   A compact identity cluster is inserted into an existing application header.
   Pages without a usable header receive the larger .puxin-pagebar. Theme
   colors belong to the navigation surface only; the logo artwork never changes.
   -------------------------------------------------------------------------- */

html[data-puxin-nav-theme] {
  --puxin-shell-surface: rgba(255, 255, 255, .96);
  --puxin-shell-surface-solid: #ffffff;
  --puxin-shell-text: #0c1827;
  --puxin-shell-muted: #667483;
  --puxin-shell-line: rgba(12, 24, 39, .16);
  --puxin-shell-hover: #eef3f5;
  --puxin-shell-accent: #21c7f3;
  --puxin-shell-action: #0c1827;
  --puxin-shell-action-text: #ffffff;
  --puxin-shell-shadow: 0 8px 24px rgba(12, 24, 39, .10);
}

html[data-puxin-nav-theme="forest"] {
  --puxin-shell-surface: rgba(14, 32, 21, .94);
  --puxin-shell-surface-solid: #0e2015;
  --puxin-shell-text: #f2ecd9;
  --puxin-shell-muted: #b9b49f;
  --puxin-shell-line: rgba(242, 236, 217, .19);
  --puxin-shell-hover: #1e3d28;
  --puxin-shell-accent: #e8c46a;
  --puxin-shell-action: #c94708;
  --puxin-shell-action-text: #ffffff;
  --puxin-shell-shadow: 0 10px 28px rgba(3, 12, 7, .28);
}

html[data-puxin-nav-theme="carbon"] {
  --puxin-shell-surface: rgba(6, 6, 10, .95);
  --puxin-shell-surface-solid: #06060a;
  --puxin-shell-text: #e8e4dc;
  --puxin-shell-muted: #aaa7a1;
  --puxin-shell-line: rgba(232, 228, 220, .16);
  --puxin-shell-hover: #1a1a22;
  --puxin-shell-accent: #e66b57;
  --puxin-shell-action: #c43e2a;
  --puxin-shell-action-text: #ffffff;
  --puxin-shell-shadow: 0 10px 30px rgba(0, 0, 0, .34);
}

html[data-puxin-nav-theme="parchment"] {
  --puxin-shell-surface: rgba(247, 244, 238, .96);
  --puxin-shell-surface-solid: #f7f4ee;
  --puxin-shell-text: #2b2620;
  --puxin-shell-muted: #766f65;
  --puxin-shell-line: rgba(43, 38, 32, .18);
  --puxin-shell-hover: #eee8dd;
  --puxin-shell-accent: #b48820;
  --puxin-shell-action: #745633;
  --puxin-shell-action-text: #ffffff;
  --puxin-shell-shadow: 0 10px 28px rgba(56, 42, 26, .13);
}

/* Full site navigation uses the same four surfaces as compact tools. */
html[data-puxin-nav-theme="forest"] .puxin-brandbar,
html[data-puxin-nav-theme="carbon"] .puxin-brandbar {
  --puxin-brandbar-paper: #ffffff;
  --puxin-brandbar-ink: var(--puxin-shell-text);
  --puxin-brandbar-text: var(--puxin-shell-text);
  --puxin-brandbar-muted: var(--puxin-shell-muted);
  --puxin-brandbar-hover: var(--puxin-shell-hover);
  --puxin-brandbar-line: var(--puxin-shell-line);
  --puxin-brandbar-cyan: var(--puxin-shell-accent);
  border-bottom-color: var(--puxin-shell-line);
  color: var(--puxin-shell-text);
  background: var(--puxin-shell-surface);
  box-shadow: var(--puxin-shell-shadow);
}

html[data-puxin-nav-theme="forest"] .puxin-brandbar__link:hover,
html[data-puxin-nav-theme="forest"] .puxin-brandbar__link--active,
html[data-puxin-nav-theme="forest"] .puxin-brandbar__link[aria-current="page"],
html[data-puxin-nav-theme="carbon"] .puxin-brandbar__link:hover,
html[data-puxin-nav-theme="carbon"] .puxin-brandbar__link--active,
html[data-puxin-nav-theme="carbon"] .puxin-brandbar__link[aria-current="page"],
html[data-puxin-nav-theme="forest"] .puxin-brandbar__search,
html[data-puxin-nav-theme="carbon"] .puxin-brandbar__search,
html[data-puxin-nav-theme="forest"] .puxin-brandbar__toggle,
html[data-puxin-nav-theme="carbon"] .puxin-brandbar__toggle {
  color: var(--puxin-shell-text);
}

html[data-puxin-nav-theme="forest"] .puxin-brandbar__cta,
html[data-puxin-nav-theme="forest"] .puxin-brandbar__role,
html[data-puxin-nav-theme="carbon"] .puxin-brandbar__cta,
html[data-puxin-nav-theme="carbon"] .puxin-brandbar__role {
  border-color: var(--puxin-shell-action);
  color: var(--puxin-shell-action-text);
  background: var(--puxin-shell-action);
}

html[data-puxin-nav-theme="parchment"] .puxin-brandbar {
  --puxin-brandbar-ink: #2b2620;
  --puxin-brandbar-text: #4b4339;
  --puxin-brandbar-muted: #766f65;
  --puxin-brandbar-hover: #eee8dd;
  --puxin-brandbar-line: rgba(43, 38, 32, .18);
  --puxin-brandbar-cyan: #b48820;
  border-bottom-color: rgba(43, 38, 32, .13);
  background: rgba(247, 244, 238, .96);
  box-shadow: var(--puxin-shell-shadow);
}

.puxin-shell-host {
  position: relative;
  isolation: isolate;
}

.puxin-pagebrand,
.puxin-pagebar,
.puxin-shell-home,
.puxin-shell-course {
  box-sizing: border-box;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}

.puxin-pagebrand *,
.puxin-pagebar *,
.puxin-shell-home *,
.puxin-shell-course * {
  box-sizing: border-box;
}

.puxin-pagebrand {
  min-width: 0;
  max-width: min(330px, 42vw);
  min-height: 40px;
  flex: 0 0 auto;
  order: -100;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin: 0 2px 0 0;
  color: var(--puxin-shell-text);
}

html[data-puxin-nav-density="app"] .puxin-pagebrand {
  max-width: min(260px, 46vw);
  min-height: 34px;
  gap: 4px;
}

html[data-puxin-nav-density="app"] .puxin-pagebrand__identity {
  min-height: 34px;
  padding: 2px 7px 2px 2px;
  border-radius: 9px;
}

html[data-puxin-nav-density="app"] .puxin-pagebrand__mark {
  width: 28px;
  height: 28px;
  flex-basis: 28px;
  border-radius: 7px;
}

html[data-puxin-nav-density="app"] .puxin-pagebrand__copy {
  display: grid;
}

html[data-puxin-nav-density="app"] .puxin-pagebrand__copy strong {
  font-size: 10px;
}

html[data-puxin-nav-density="app"] .puxin-pagebrand__copy small {
  font-size: 6.8px;
}

html[data-puxin-nav-density="app"] .puxin-pagebrand .puxin-shell-home {
  width: 34px;
  min-width: 34px;
  min-height: 34px;
  padding: 0;
}

html[data-puxin-nav-density="app"] .puxin-pagebrand .puxin-shell-home span {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.puxin-pagebrand__identity {
  min-width: 0;
  min-height: 40px;
  padding: 3px 9px 3px 3px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  overflow: hidden;
  border: 1px solid var(--puxin-shell-line);
  border-radius: 11px;
  color: var(--puxin-shell-text);
  background: var(--puxin-shell-surface);
  box-shadow: var(--puxin-shell-shadow);
  text-decoration: none;
  backdrop-filter: saturate(145%) blur(14px);
  -webkit-backdrop-filter: saturate(145%) blur(14px);
  transition: border-color .18s ease, transform .18s ease, box-shadow .18s ease;
}

.puxin-pagebrand__identity:hover {
  border-color: var(--puxin-shell-accent);
  color: var(--puxin-shell-text);
  transform: translateY(-1px);
}

/* Existing page headers keep their own surface. The shared identity upgrades
   the original logo position without drawing a second floating pill. */
.puxin-pagebrand__identity.puxin-pagebrand__identity--native {
  padding: 2px 4px 2px 0;
  border-color: transparent;
  border-radius: 0;
  color: inherit;
  background: transparent;
  box-shadow: none;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
}

.puxin-pagebrand__identity.puxin-pagebrand__identity--native .puxin-pagebrand__copy strong,
.puxin-pagebrand__identity.puxin-pagebrand__identity--native .puxin-pagebrand__copy small {
  color: inherit;
}

.puxin-pagebrand__identity.puxin-pagebrand__identity--native .puxin-pagebrand__copy small {
  opacity: .64;
}

.puxin-pagebrand__identity.puxin-pagebrand__identity--native:hover {
  border-color: transparent;
  background: transparent;
  box-shadow: none;
  transform: none;
}

.puxin-pagebrand__mark {
  position: relative;
  width: 32px;
  height: 32px;
  flex: 0 0 32px;
  overflow: hidden;
  border: 1px solid rgba(12, 24, 39, .14);
  border-radius: 8px;
  background: #ffffff;
}

.puxin-pagebrand__mark img {
  position: absolute;
  inset: 2px;
  width: calc(100% - 4px);
  height: calc(100% - 4px);
  max-width: none;
  object-fit: contain;
  object-position: center;
  filter: none;
  transform: none;
}

.puxin-pagebrand__copy {
  min-width: 0;
  display: grid;
  gap: 1px;
  text-align: left;
  line-height: 1.1;
}

.puxin-pagebrand__copy strong,
.puxin-pagebrand__copy small {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.puxin-pagebrand__copy strong {
  color: var(--puxin-shell-text);
  font-size: 11px;
  font-weight: 820;
  letter-spacing: .055em;
}

.puxin-pagebrand__copy small {
  color: var(--puxin-shell-muted);
  font-size: 7.5px;
  font-weight: 680;
  letter-spacing: .04em;
}

.puxin-shell-home,
.puxin-shell-course {
  min-height: 36px;
  padding: 0 11px;
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  border: 1px solid var(--puxin-shell-line);
  border-radius: 9px;
  color: var(--puxin-shell-text);
  background: var(--puxin-shell-surface);
  box-shadow: none;
  font-size: 11px;
  font-weight: 760;
  line-height: 1;
  text-decoration: none;
  white-space: nowrap;
  backdrop-filter: saturate(145%) blur(14px);
  -webkit-backdrop-filter: saturate(145%) blur(14px);
  transition: border-color .18s ease, background .18s ease, transform .18s ease;
}

.puxin-shell-home:hover,
.puxin-shell-course:hover {
  border-color: var(--puxin-shell-accent);
  color: var(--puxin-shell-text);
  background: var(--puxin-shell-hover);
  transform: translateY(-1px);
}

.puxin-shell-home svg,
.puxin-shell-course svg {
  width: 14px;
  height: 14px;
  flex: 0 0 14px;
  display: block;
}

.puxin-shell-home--primary {
  border-color: var(--puxin-shell-action);
  color: var(--puxin-shell-action-text);
  background: var(--puxin-shell-action);
}

.puxin-shell-home--primary:hover {
  border-color: var(--puxin-shell-action);
  color: var(--puxin-shell-action-text);
  background: var(--puxin-shell-action);
  filter: brightness(1.08);
}

/* Old cached runtimes used to inject a separate home button. The brand link is
   now the only home affordance, so hide any stale node before JavaScript runs. */
.puxin-shell-home,
[data-puxin-section="home"] {
  display: none !important;
}

img.puxin-shell-legacy-logo {
  width: 40px !important;
  height: 40px !important;
  max-width: 40px !important;
  max-height: 40px !important;
  padding: 2px !important;
  border: 1px solid rgba(12, 24, 39, .14) !important;
  border-radius: 10px !important;
  background: #ffffff !important;
  object-fit: contain !important;
  object-position: center !important;
  filter: none !important;
  transform: none !important;
}

.puxin-pagebar {
  position: sticky;
  top: 0;
  z-index: var(--puxin-pagebar-z, 2050);
  width: 100%;
  min-height: 64px;
  padding: 8px clamp(14px, 3vw, 34px);
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 16px;
  border-bottom: 1px solid var(--puxin-shell-line);
  color: var(--puxin-shell-text);
  background: var(--puxin-shell-surface);
  box-shadow: var(--puxin-shell-shadow);
  backdrop-filter: saturate(155%) blur(18px);
  -webkit-backdrop-filter: saturate(155%) blur(18px);
}

html[data-puxin-nav-density="app"] .puxin-pagebar {
  min-height: 52px;
  padding-block: 6px;
}

.puxin-pagebar .puxin-pagebrand__identity {
  box-shadow: none;
}

.puxin-pagebar__context {
  min-width: 0;
  display: grid;
  gap: 1px;
}

.puxin-pagebar__context strong,
.puxin-pagebar__context small {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.puxin-pagebar__context strong {
  color: var(--puxin-shell-text);
  font-size: 13px;
  font-weight: 760;
}

.puxin-pagebar__context small {
  color: var(--puxin-shell-muted);
  font-size: 9px;
}

.puxin-pagebar__actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 7px;
}

.puxin-pagebar--floating {
  position: fixed;
  top: max(10px, env(safe-area-inset-top));
  left: max(10px, env(safe-area-inset-left));
  width: auto;
  max-width: calc(100vw - 20px);
  min-height: 48px;
  grid-template-columns: auto minmax(0, 1fr) auto;
  padding: 4px;
  border: 1px solid var(--puxin-shell-line);
  border-radius: 13px;
}

.puxin-pagebar--floating .puxin-pagebar__context small,
.puxin-pagebar--floating .puxin-shell-course {
  display: none;
}

/* The lesson rail is intentionally only 104px wide on desktop. Keep the
   original logo and both brand lines visible by stacking them in its native
   header instead of creating a second floating bar. */
@media (min-width: 761px) {
  body.lesson-unified-rail .drawer-head .brand.puxin-pagebrand__identity {
    width: 100% !important;
    height: 100% !important;
    min-height: 0 !important;
    padding: 2px !important;
    display: grid !important;
    grid-template-columns: 1fr !important;
    grid-template-rows: 25px auto !important;
    justify-items: center !important;
    align-content: center !important;
    gap: 2px !important;
    overflow: visible !important;
  }

  body.lesson-unified-rail .drawer-head .brand .puxin-pagebrand__mark {
    width: 25px !important;
    height: 25px !important;
    min-width: 25px !important;
    display: block !important;
    grid-row: 1 !important;
    border-radius: 6px !important;
  }

  body.lesson-unified-rail .drawer-head .brand .puxin-pagebrand__copy {
    width: 100% !important;
    display: grid !important;
    grid-row: 2 !important;
    justify-items: center !important;
    gap: 0 !important;
  }

  body.lesson-unified-rail .drawer-head .brand .puxin-pagebrand__copy strong {
    font: 800 8px/1.15 "Microsoft YaHei", "PingFang SC", sans-serif !important;
    letter-spacing: .015em !important;
  }

  body.lesson-unified-rail .drawer-head .brand .puxin-pagebrand__copy small {
    margin-top: 1px !important;
    font: 650 5.5px/1.1 "Microsoft YaHei", "PingFang SC", sans-serif !important;
    letter-spacing: .01em !important;
  }
}

@media (max-width: 1180px) {
  .puxin-pagebrand__copy small {
    display: block;
  }

  .puxin-pagebrand {
    max-width: min(260px, 44vw);
  }

  html[data-puxin-nav-density="app"] .puxin-shell-host[data-puxin-shell-mode="compact"] > h1 {
    display: none;
  }
}

@media (max-width: 820px) {
  html[data-puxin-page-shell-ready="true"] body > .puxin-brandchip--fixed {
    width: auto !important;
    max-width: calc(100vw - 24px);
  }

  html[data-puxin-page-shell-ready="true"] body > .puxin-brandchip--fixed .puxin-brandchip__copy {
    display: grid !important;
  }

  .puxin-pagebrand {
    max-width: none;
    gap: 4px;
  }

  .puxin-pagebrand__identity {
    padding-right: 4px;
  }

  .puxin-pagebrand__copy {
    display: grid;
  }

  .puxin-shell-home,
  .puxin-shell-course {
    width: 36px;
    min-width: 36px;
    padding: 0;
  }

  .puxin-shell-home span,
  .puxin-shell-course span {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap;
  }

  .puxin-pagebar {
    min-height: 56px;
    padding: 6px 10px;
    gap: 8px;
  }

  .puxin-pagebar__context strong {
    font-size: 11px;
  }

  .puxin-pagebar__context small,
  .puxin-pagebar__actions .puxin-shell-course {
    display: none;
  }
}

@media (max-width: 520px) {
  .puxin-pagebar__context {
    display: none;
  }

  .puxin-pagebar {
    grid-template-columns: minmax(0, 1fr) auto;
  }

  .puxin-pagebar .puxin-pagebrand__copy {
    display: grid;
  }
}

@media (max-width: 360px) {
  .puxin-pagebrand__copy strong {
    font-size: 9.5px;
    letter-spacing: .02em;
  }

  .puxin-pagebrand__copy small {
    font-size: 6.5px;
    letter-spacing: .02em;
  }
}

@media (prefers-reduced-motion: reduce) {
  .puxin-pagebrand__identity,
  .puxin-shell-home,
  .puxin-shell-course {
    transition-duration: .001ms;
  }
}