:root {
  --teal-950: #123f43;
  --teal-800: #185b5c;
  --teal-700: #257572;
  --teal-500: #579995;
  --teal-200: #c9e1dc;
  --teal-100: #eaf5f2;
  --teal-50: #f4faf8;
  --gold: #ae8648;
  --ink-soft: #627879;
  --line: rgba(25, 91, 92, 0.14);
  --shadow: 0 18px 48px rgba(19, 66, 67, 0.09);
  --page-gutter: clamp(20px, 4.5vw, 72px);
  --ui-font: "DM Sans", "Avenir Next", "Helvetica Neue", sans-serif;
  --editorial-font: "Newsreader", Georgia, serif;
  --chinese-font: "Noto Sans SC", "PingFang SC", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  position: relative;
  min-width: 320px;
  margin: 0;
  color: var(--teal-950);
  background:
    radial-gradient(circle at 12% 0, rgba(190, 224, 215, 0.32), transparent 31rem),
    linear-gradient(180deg, #fbfdfc, #f2f8f6 52rem);
  font-family: var(--ui-font);
  font-size: 16px;
  line-height: 1.5;
}

body::before {
  position: absolute;
  z-index: -1;
  top: 0;
  right: 0;
  left: 0;
  height: 315px;
  content: "";
  pointer-events: none;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.18), rgba(255, 255, 255, 0.68)),
    url("assets/brand/homepage-landscape-west-lake-full-v1.webp") center bottom / cover no-repeat;
  opacity: 0.72;
}

button,
a {
  font: inherit;
}

a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 3px solid rgba(37, 117, 114, 0.28);
  outline-offset: 3px;
}

.culture-shell,
.site-footer {
  width: auto;
  margin-inline: var(--page-gutter);
}

.culture-shell {
  min-height: calc(100vh - 180px);
  padding: 16px 0 48px;
}

.catalog-intro {
  display: flex;
  max-width: 1580px;
  margin: 0 auto 16px;
  align-items: end;
  justify-content: space-between;
  gap: 28px;
}

.eyebrow {
  margin: 0 0 4px;
  color: var(--teal-700);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.catalog-intro h1 {
  margin: 0;
  font-family: var(--editorial-font);
  font-size: clamp(2.15rem, 3.2vw, 3.25rem);
  font-weight: 600;
  letter-spacing: -0.035em;
  line-height: 1;
}

.catalog-intro > div > p:last-child {
  margin: 8px 0 0;
  color: var(--ink-soft);
  font-size: 1rem;
}

.collection-count,
.selected-count {
  display: flex;
  margin: 0;
  align-items: baseline;
  gap: 7px;
  color: var(--ink-soft);
}

.collection-count strong,
.selected-count strong {
  color: var(--teal-800);
  font-family: var(--editorial-font);
  font-size: 2.1rem;
  font-weight: 600;
}

.loading-message {
  max-width: 1580px;
  margin: 20px auto;
  color: var(--ink-soft);
}

.loading-message.is-error {
  color: #99443f;
}

.main-catalogs {
  display: grid;
  max-width: 1580px;
  margin: 0 auto;
  grid-template-columns: repeat(8, minmax(0, 1fr));
  gap: 10px;
}

.catalog-button {
  position: relative;
  display: grid;
  min-height: 186px;
  padding: 18px 12px 16px;
  align-content: center;
  justify-items: center;
  border: 1px solid var(--line);
  border-radius: 13px;
  color: var(--teal-950);
  background: rgba(255, 255, 255, 0.88);
  box-shadow: 0 9px 24px rgba(19, 66, 67, 0.06);
  text-align: center;
  cursor: pointer;
  transition: border-color 160ms ease, box-shadow 160ms ease, transform 160ms ease;
}

.catalog-button:hover {
  border-color: rgba(37, 117, 114, 0.42);
  box-shadow: 0 14px 30px rgba(19, 66, 67, 0.1);
  transform: translateY(-2px);
}

.catalog-button[aria-pressed="true"] {
  border-color: var(--teal-700);
  background: linear-gradient(180deg, #fff, var(--teal-100));
  box-shadow: inset 0 0 0 1px var(--teal-700), 0 14px 32px rgba(19, 66, 67, 0.1);
}

.catalog-icon {
  display: grid;
  width: 82px;
  height: 82px;
  margin-bottom: 10px;
  place-items: center;
  background: transparent;
}

.catalog-icon img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  transform: scale(1.18);
}

.catalog-button strong,
.catalog-button span {
  display: block;
}

.catalog-button strong {
  font-family: var(--chinese-font);
  font-size: 1.05rem;
  line-height: 1.25;
}

.catalog-button .catalog-en {
  min-height: 2.5em;
  margin-top: 4px;
  color: var(--teal-700);
  font-family: var(--editorial-font);
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.18;
}

.catalog-browser {
  max-width: 1580px;
  margin: 28px auto 0;
  border-top: 1px solid var(--line);
}

.selected-catalog {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  padding: 25px 4px 18px;
  align-items: center;
  gap: 14px;
}

.subcatalog-prompt {
  margin: 0 4px 9px;
  color: var(--teal-700);
  font-size: 0.86rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.selected-icon {
  display: grid;
  width: 60px;
  height: 60px;
  place-items: center;
  background: transparent;
}

.selected-icon img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  transform: scale(1.12);
}

.selected-catalog h2 {
  display: flex;
  margin: 0;
  align-items: baseline;
  gap: 10px;
  line-height: 1.15;
}

.selected-catalog h2 span:first-child {
  font-family: var(--chinese-font);
  font-size: 1.6rem;
}

.selected-catalog h2 span:last-child {
  color: var(--teal-700);
  font-family: var(--editorial-font);
  font-size: 1.45rem;
  font-weight: 600;
}

.subcatalogs {
  display: grid;
  padding: 0 4px 24px;
  grid-template-columns: repeat(var(--selection-count, 1), minmax(0, 1fr));
  gap: 12px;
}

.subcatalog-button {
  display: grid;
  min-width: 210px;
  min-height: 72px;
  padding: 11px 16px 12px;
  align-content: center;
  gap: 3px;
  border: 1px solid var(--line);
  border-radius: 14px;
  color: #315c5e;
  background: rgba(255, 255, 255, 0.9);
  cursor: pointer;
  line-height: 1.12;
  text-align: center;
}

.subcatalog-button .subcatalog-en,
.subcatalog-button .subcatalog-zh {
  display: block;
}

.subcatalog-button .subcatalog-en {
  color: var(--ink-soft);
  font-family: var(--editorial-font);
  font-size: 0.92rem;
  font-weight: 600;
}

.subcatalog-button .subcatalog-zh {
  color: #315c5e;
  font-family: var(--chinese-font);
  font-size: 1rem;
  font-weight: 700;
}

.subcatalog-button:hover,
.subcatalog-button[aria-pressed="true"] {
  border-color: var(--teal-700);
  color: #fff;
  background: var(--teal-700);
}

.subcatalog-button[aria-pressed="true"] .subcatalog-en,
.subcatalog-button:hover .subcatalog-en {
  color: #fff;
}

.subcatalog-button[aria-pressed="true"] .subcatalog-zh,
.subcatalog-button:hover .subcatalog-zh {
  color: rgba(255, 255, 255, 0.78);
}

.stories-section {
  padding: 26px 0 18px;
  border-top: 1px solid var(--line);
}

.stories-heading {
  display: flex;
  margin-bottom: 18px;
  padding: 0 4px;
  align-items: end;
  justify-content: space-between;
  gap: 20px;
}

.stories-heading h2 {
  margin: 0;
  font-family: var(--editorial-font);
  font-size: clamp(1.8rem, 2.8vw, 2.7rem);
  font-weight: 600;
  letter-spacing: -0.025em;
  line-height: 1;
}

.stories-heading .eyebrow {
  margin-bottom: 10px;
}

.stories-heading > p {
  margin: 0;
  color: var(--ink-soft);
}

.story-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 15px;
}

.story-card {
  display: grid;
  overflow: hidden;
  grid-template-rows: auto 1fr;
  border: 1px solid var(--line);
  border-radius: 12px;
  color: var(--teal-950);
  background: rgba(255, 255, 255, 0.94);
  box-shadow: 0 8px 24px rgba(19, 66, 67, 0.06);
  text-decoration: none;
  transition: border-color 160ms ease, box-shadow 160ms ease, transform 160ms ease;
}

.story-card:hover {
  border-color: rgba(37, 117, 114, 0.38);
  box-shadow: 0 16px 34px rgba(19, 66, 67, 0.11);
  transform: translateY(-3px);
}

.story-image {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background:
    linear-gradient(110deg, transparent 30%, rgba(255, 255, 255, 0.72) 48%, transparent 66%),
    var(--teal-100);
  background-size: 220% 100%, auto;
  animation: image-loading 1.4s linear infinite;
}

.story-image.is-ready {
  animation: none;
  background: var(--teal-100);
}

.story-image img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transition: opacity 180ms ease;
}

.story-image.is-ready img {
  opacity: 1;
}

@keyframes image-loading {
  to {
    background-position: -220% 0, 0 0;
  }
}

.story-copy {
  display: grid;
  min-height: 216px;
  padding: 17px 18px 16px;
  grid-template-rows: auto auto 1fr auto;
}

.story-copy h3,
.story-copy h4,
.story-copy p {
  margin: 0;
}

.story-copy h3 {
  font-family: var(--chinese-font);
  font-size: 1.12rem;
  line-height: 1.35;
}

.story-copy h4 {
  margin-top: 5px;
  color: var(--teal-700);
  font-family: var(--editorial-font);
  font-size: 1.05rem;
  font-weight: 600;
  line-height: 1.2;
}

.story-copy p {
  margin-top: 11px;
  color: var(--ink-soft);
  font-size: 0.86rem;
  line-height: 1.42;
}

.story-link-label {
  display: inline-flex;
  margin-top: 14px;
  align-items: center;
  justify-content: space-between;
  color: var(--teal-800);
  font-size: 0.82rem;
  font-weight: 700;
}

.story-link-label b {
  display: grid;
  width: 28px;
  height: 28px;
  place-items: center;
  border-radius: 50%;
  color: #fff;
  background: var(--teal-700);
}

.site-footer {
  display: flex;
  padding: 20px 4px 28px;
  align-items: center;
  justify-content: center;
  gap: 12px;
  border-top: 1px solid var(--line);
}

.site-footer img {
  width: 44px;
  height: 44px;
  object-fit: contain;
}

.site-footer div {
  display: grid;
  justify-items: start;
  color: var(--ink-soft);
  font-size: 0.78rem;
  text-align: left;
}

.site-footer strong {
  color: #456566;
  font-size: 0.86rem;
}

@media (max-width: 1340px) {
  .culture-shell {
    padding-top: 16px;
  }

  .catalog-intro {
    margin-bottom: 16px;
  }

  .catalog-intro > div > p:last-child {
    margin-top: 8px;
  }

  .main-catalogs {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 8px;
  }

  .catalog-button {
    min-height: 136px;
    padding: 10px 10px 9px;
  }

  .catalog-icon {
    width: 64px;
    height: 64px;
    margin-bottom: 2px;
  }

  .catalog-button .catalog-en {
    min-height: 0;
    margin-top: 2px;
  }

  .catalog-browser {
    margin-top: 16px;
  }

  .selected-catalog {
    padding: 16px 4px 10px;
  }

  .selected-icon {
    width: 48px;
    height: 48px;
  }

  .subcatalogs[data-selection-count="4"],
  .subcatalogs[data-selection-count="5"] {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .subcatalog-button {
    min-width: 0;
  }

  .story-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 920px) {
  .culture-shell {
    padding-top: 16px;
  }

  .story-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

}

@media (max-width: 680px) {
  body::before {
    height: 360px;
  }

  .catalog-intro {
    align-items: start;
  }

  .catalog-intro h1 {
    font-size: clamp(2.1rem, 10vw, 2.85rem);
  }

  .collection-count {
    display: none;
  }

  .main-catalogs {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .catalog-button {
    min-height: 140px;
  }

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

  .selected-count {
    display: none;
  }

  .selected-catalog h2 {
    display: grid;
    gap: 2px;
  }

  .subcatalogs[data-selection-count="3"],
  .subcatalogs[data-selection-count="4"],
  .subcatalogs[data-selection-count="5"] {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .story-grid {
    grid-template-columns: 1fr;
  }

  .story-copy {
    min-height: 0;
  }

}

@media (max-width: 460px) {
  .subcatalogs {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}