:root {
  --site-header-height: 55px;
}

.site-header {
  position: fixed;
  z-index: 50;
  top: 0;
  left: 0;
  width: 100%;
  min-height: var(--site-header-height);
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 30px;
  padding: 8px var(--page-padding);
  color: var(--ink);
  border-bottom: 1px solid var(--line);
  background: rgba(236, 235, 230, 0.88);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.35) inset;
  backdrop-filter: blur(24px) saturate(145%);
  -webkit-backdrop-filter: blur(24px) saturate(145%);
}

.brand-mark {
  width: max-content;
  font: 700 clamp(20px, 2vw, 30px)/1 var(--display);
  letter-spacing: -0.07em;
}

.brand-mark--image {
  width: 42px;
  height: 38px;
  overflow: hidden;
  border-radius: 3px;
  background: #ed1b24;
}

.brand-mark--image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.site-nav-shell {
  --nav-inline-size: clamp(316px, 34vw, 420px);
  --nav-column-gap: clamp(0px, 0.28vw, 4px);
  position: absolute;
  right: 10px;
  left: 0;
  width: var(--nav-inline-size);
  margin: auto;
}

.site-nav {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  align-items: center;
  gap: var(--nav-column-gap);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
}

.site-nav a {
  position: relative;
  display: flex;
  justify-content: center;
  padding: 10px 14px;
  text-align: center;
}

.site-nav a::after {
  position: absolute;
  bottom: 7px;
  left: 14px;
  width: calc(100% - 28px);
  height: 1px;
  content: "";
  background: currentColor;
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 240ms ease;
}

.site-nav a:hover::after {
  transform: scaleX(1);
  transform-origin: left;
}

.detailed-header {
  position: fixed;
  top: var(--site-header-height);
  left: 0;
  width: 100%;
  display: grid;
  grid-template-columns: 1fr;
  column-gap: 30px;
  row-gap: 8px;
  padding: 8px var(--page-padding) 18px;
  border-bottom: 1px solid var(--line);
  background: rgba(236, 235, 230, 0.88);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.35) inset;
  opacity: 0;
  pointer-events: none;
  transform: translateY(-10px);
  transition: opacity 220ms ease, transform 220ms ease;
  backdrop-filter: blur(24px) saturate(145%);
  -webkit-backdrop-filter: blur(24px) saturate(145%);
  isolation: isolate;
}

.detailed-header::after {
  position: absolute;
  inset: 0;
  z-index: -1;
  content: "";
  background: rgba(236, 235, 230, 0.92);
}

@media (hover: hover) and (pointer: fine) {
  .site-header:hover .detailed-header,
  .site-header:focus-within .detailed-header {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
  }
}

.detailed-header-grid {
  position: relative;
  z-index: 1;
  justify-self: center;
  grid-column: 1;
  grid-row: 1;
  width: var(--nav-inline-size);
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--nav-column-gap);
  margin: 6px 10px 0 0;
}

.detailed-header-column {
  min-width: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 9px;
  padding: 0 14px;
  text-align: center;
}

.detailed-header-column a {
  width: 100%;
  max-width: 180px;
  color: rgba(17, 17, 15, 0.72);
  font-size: 11px;
  font-weight: 700;
  line-height: 1.35;
  text-transform: uppercase;
}

.detailed-header-column a:hover,
.detailed-header-column a:focus-visible {
  color: var(--store-red, #c9362f);
}

.header-actions {
  grid-column: 3;
  justify-self: end;
  display: flex;
  align-items: center;
  gap: clamp(6px, 0.7vw, 9px);
}

.pill-button {
  min-width: clamp(108px, 12vw, 142px);
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px clamp(11px, 1vw, 15px);
  border-radius: 99px;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
}

.pill-button--dark {
  color: var(--paper);
  background: var(--ink);
}

.pill-button--store {
  border: 0;
  color: var(--white);
  background: var(--store-red, #c9362f);
  cursor: pointer;
}

@media (max-width: 900px) {
  :root {
    --site-header-height: 57px;
    --mobile-action-width: clamp(108px, 12vw, 142px);
    --mobile-nav-inline-size: clamp(220px, 56vw, 320px);
  }

  .site-header {
    grid-template-columns: auto minmax(0, 1fr) auto;
    gap: 10px;
    padding-top: 8px;
    padding-bottom: 8px;
  }

  .site-nav-shell {
    position: relative;
    right: auto;
    left: auto;
    justify-self: center;
    width: min(100%, var(--mobile-nav-inline-size));
    margin: 0;
  }

  .site-nav {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0;
    font-size: 11px;
  }

  .site-nav a {
    min-width: 0;
    padding: 12px 2px;
    white-space: nowrap;
  }

  .site-nav a::after {
    right: 7px;
    bottom: 5px;
    left: 7px;
    width: auto;
  }

  .header-actions {
    gap: 0;
  }

  .header-actions .pill-button--dark {
    display: none;
  }

  .site-header--sub {
    --mobile-action-width: 42px;
    grid-template-columns: 42px minmax(0, 1fr) 42px;
  }

  .site-header--sub .header-actions {
    width: 42px;
  }

  .detailed-header {
    top: var(--site-header-height);
    grid-template-columns: 42px minmax(0, 1fr) var(--mobile-action-width);
    column-gap: 10px;
    max-height: calc(100svh - var(--site-header-height));
    padding: 8px var(--page-padding) 20px;
    overflow-y: auto;
  }

  .detailed-header-grid {
    grid-column: 2;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    width: min(100%, var(--mobile-nav-inline-size));
    gap: 20px 0;
    margin: 4px 0 0;
  }

  .detailed-header-column {
    align-items: center;
    gap: 8px;
    padding: 0 2px;
    text-align: center;
  }

  .detailed-header-column a {
    max-width: none;
    font-size: 12px;
  }

  .site-header.is-mobile-nav-open .detailed-header {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
  }
}

@media (max-width: 600px) {
  :root {
    --mobile-action-width: 42px;
  }

  .site-header {
    gap: 8px;
    padding-top: 8px;
  }

  .pill-button {
    min-width: 0;
    padding: 10px 12px;
    font-size: 9px;
  }

  .header-actions {
    gap: 5px;
  }

  .pill-button > span:last-child {
    display: none;
  }

  .pill-button .lang-zh {
    font-size: 0;
  }

  .pill-button--dark .lang-zh::after {
    content: "合作";
    font-size: 9px;
  }

  .pill-button--store .lang-zh::after {
    content: "商店";
    font-size: 9px;
  }

  .detailed-header {
    column-gap: 8px;
  }

  .detailed-header-column a {
    font-size: 10px;
  }
}