.material-collections-page {
  background:
    radial-gradient(circle at 8% 8%, rgba(176, 137, 70, 0.1), transparent 24%),
    linear-gradient(180deg, #fffdfa 0%, var(--surface-page) 48%, #f0ede2 100%);
}

.material-collections-page :where(h1, h2, p, strong, a) {
  overflow-wrap: anywhere;
}

.collections-hero {
  padding: var(--space-16) 0 var(--space-10);
  border-bottom: 1px solid var(--border-soft);
  background:
    linear-gradient(115deg, rgba(255, 253, 247, 0.98), rgba(246, 241, 225, 0.9)),
    repeating-linear-gradient(105deg, transparent 0 28px, rgba(155, 107, 43, 0.04) 29px 30px);
}

.collections-hero-inner {
  max-width: 980px;
  text-align: center;
}

.collections-hero .section-eyebrow {
  margin: 0 0 var(--space-3);
  color: var(--gold);
  font-family: var(--font-ui), var(--font-cjk);
  font-size: 12px;
  font-weight: 600;
  line-height: 1.4;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.collections-hero h1 {
  margin: 0;
  color: var(--green-950);
  font-family: var(--font-display);
  font-size: 56px;
  font-weight: 400;
  line-height: 1.05;
}

.collections-hero-inner > p:last-child {
  max-width: 820px;
  margin: var(--space-5, 20px) auto 0;
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
}

.material-collection {
  padding: var(--space-16) 0;
}

.material-collection--solid {
  border-block: 1px solid rgba(10, 70, 42, 0.08);
  background: rgba(232, 236, 225, 0.46);
}

.material-collection--printed {
  background:
    radial-gradient(circle at 88% 12%, rgba(155, 107, 43, 0.08), transparent 24%),
    rgba(255, 253, 247, 0.5);
}

.collection-inner {
  container-type: inline-size;
}

.collection-header {
  max-width: 1100px;
  margin-bottom: var(--space-8);
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr);
  gap: var(--space-6);
  align-items: start;
}

.collection-number {
  width: 56px;
  height: 56px;
  margin: 2px 0 0;
  display: grid;
  place-items: center;
  border: 1px solid rgba(155, 107, 43, 0.66);
  border-radius: 50%;
  color: #8d5e1e;
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 600;
  line-height: 1;
  background: rgba(255, 253, 247, 0.68);
}

.collection-header h2 {
  margin: 0;
  color: var(--green-950);
  font-family: var(--font-display);
  font-size: 40px;
  font-weight: 600;
  line-height: 1.12;
}

.collection-subtitle {
  margin: var(--space-3) 0 0;
  color: #54613f;
  font-family: var(--font-ui), var(--font-cjk);
  font-size: 18px;
  font-weight: 500;
  line-height: 1.35;
}

.collection-subtitle:empty {
  display: none;
}

.collection-description {
  max-width: 840px;
  margin: var(--space-3) 0 0;
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
}

.collection-swipe-hint {
  display: none;
}

.collection-grid {
  display: grid;
  gap: var(--space-6);
}

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

.collection-grid--four {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.collection-strip {
  position: relative;
}

.collection-strip-nav {
  position: absolute;
  top: 50%;
  z-index: 3;
  width: 44px;
  height: 44px;
  margin: 0;
  padding: 0;
  display: grid;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.42);
  border-radius: 50%;
  color: var(--white);
  background: rgba(5, 43, 25, 0.52);
  box-shadow: 0 8px 20px rgba(5, 32, 19, 0.18);
  transform: translateY(-50%);
  opacity: 0;
  pointer-events: none;
  cursor: pointer;
  transition:
    opacity 150ms ease,
    background 150ms ease,
    transform 150ms ease;
}

.collection-strip-nav svg {
  width: 22px;
  height: 22px;
}

.collection-strip-nav--prev {
  left: var(--space-2);
}

.collection-strip-nav--next {
  right: var(--space-2);
}

.collection-strip:not(.is-scrollable) .collection-strip-nav {
  display: none;
}

.collection-strip.is-scrollable:hover .collection-strip-nav,
.collection-strip.is-scrollable.is-controls-visible .collection-strip-nav,
.collection-strip.is-scrollable:focus-within .collection-strip-nav {
  opacity: 0.72;
  pointer-events: auto;
}

.collection-strip.is-scrollable .collection-strip-nav:hover,
.collection-strip.is-scrollable .collection-strip-nav:focus-visible {
  opacity: 1;
  background: rgba(5, 43, 25, 0.82);
}

.collection-strip.is-scrollable .collection-strip-nav:disabled {
  opacity: 0.28;
  cursor: default;
}

.collection-card {
  position: relative;
  min-width: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  border: 1px solid rgba(155, 107, 43, 0.3);
  border-radius: var(--radius);
  overflow: hidden;
  color: var(--green-950);
  background: rgba(255, 255, 255, 0.9);
  box-shadow: 0 14px 28px rgba(22, 36, 29, 0.07);
  text-align: left;
  cursor: default;
  transition:
    border-color 150ms ease,
    box-shadow 150ms ease,
    transform 150ms ease;
}

.collection-card:hover,
.collection-card:focus-within {
  border-color: rgba(10, 70, 42, 0.46);
  box-shadow: 0 18px 36px rgba(22, 36, 29, 0.13);
  transform: translateY(-3px);
}

.collection-card-heading {
  min-height: 78px;
  padding: var(--space-4);
  display: grid;
  grid-template-columns: 36px minmax(0, 1fr);
  gap: var(--space-3);
  align-items: center;
  border-bottom: 1px solid rgba(155, 107, 43, 0.16);
  background: linear-gradient(120deg, rgba(255, 253, 247, 0.98), rgba(247, 241, 224, 0.8));
}

.collection-card-heading > span {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border: 1px solid rgba(155, 107, 43, 0.52);
  border-radius: 50%;
  color: #8d5e1e;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 600;
  line-height: 1;
}

.collection-card-heading strong {
  color: var(--green-950);
  font-family: var(--font-ui), var(--font-cjk);
  font-size: 16px;
  font-weight: 600;
  line-height: 1.3;
}

.collection-card-media {
  aspect-ratio: 3 / 4;
  display: block;
  overflow: hidden;
  background: #f7f4ed;
}

.collection-card-media img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: contain;
  object-position: center;
  -webkit-user-drag: none;
  user-select: none;
  pointer-events: none;
  transition: transform 200ms ease;
}

.collection-card:hover .collection-card-media img,
.collection-card:focus-within .collection-card-media img {
  transform: scale(1.012);
}

.collection-card-zoom {
  position: absolute;
  right: var(--space-3);
  bottom: var(--space-3);
  z-index: 2;
  width: 40px;
  height: 40px;
  margin: 0;
  padding: 0;
  display: grid;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.66);
  border-radius: 50%;
  color: var(--white);
  background: rgba(5, 43, 25, 0.78);
  box-shadow: 0 6px 16px rgba(5, 32, 19, 0.2);
  cursor: zoom-in;
  transition:
    background 150ms ease,
    transform 150ms ease;
}

.collection-card-zoom:hover,
.collection-card-zoom:focus-visible {
  background: var(--green-900);
  transform: scale(1.05);
}

.collection-card-zoom svg {
  width: 20px;
  height: 20px;
}

.collections-return-wrap {
  padding-block: var(--space-10) var(--space-16);
}

.collections-return {
  width: fit-content;
  margin-inline: auto;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  color: var(--green-950);
  font-family: var(--font-ui), var(--font-cjk);
  font-size: 16px;
  font-weight: 600;
  line-height: 1.3;
  text-align: center;
  transition:
    color 150ms ease,
    transform 150ms ease;
}

.collections-return svg {
  width: 20px;
  height: 20px;
  flex: 0 0 auto;
}

.collections-return:hover,
.collections-return:focus-visible {
  color: var(--green-800);
  transform: translateX(-3px);
}

.collections-lightbox {
  width: min(94vw, 1120px);
  max-width: none;
  max-height: 94vh;
  padding: 0;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: var(--radius);
  overflow: hidden;
  background: rgba(13, 31, 23, 0.97);
  box-shadow: 0 28px 80px rgba(0, 0, 0, 0.36);
}

.collections-lightbox::backdrop {
  background: rgba(4, 18, 11, 0.8);
}

.collections-lightbox-inner {
  position: relative;
  display: grid;
  place-items: center;
  padding: clamp(var(--space-4), 3vw, var(--space-8));
}

.collections-lightbox img {
  width: auto;
  height: auto;
  max-width: 100%;
  max-height: min(80vh, 920px);
  object-fit: contain;
}

.collections-lightbox p {
  max-width: 760px;
  margin: var(--space-3) auto 0;
  color: #f5e7bd;
  font-family: var(--font-ui), var(--font-cjk);
  font-size: 15px;
  line-height: 1.4;
  text-align: center;
}

.collections-lightbox-close {
  position: absolute;
  top: var(--space-3);
  right: var(--space-3);
  z-index: 1;
  width: 42px;
  height: 42px;
  padding: 0;
  display: grid;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.42);
  border-radius: 50%;
  color: var(--white);
  background: rgba(5, 32, 19, 0.78);
  cursor: pointer;
  transition:
    background 150ms ease,
    transform 150ms ease;
}

.collections-lightbox-close:hover,
.collections-lightbox-close:focus-visible {
  background: var(--green-900);
  transform: scale(1.05);
}

.collections-lightbox-close svg {
  width: 22px;
  height: 22px;
}

body[data-current-lang="zh"] .collections-hero h1,
body[data-current-lang="zh"] .collection-header h2 {
  font-family: var(--font-cjk);
  font-weight: 600;
  line-height: 1.14;
}

/* 宽档仍 Grid 但偏紧时：缩标题区，不折列。 */
@container (min-width: 781px) and (max-width: 1100px) {
  .collection-card-heading {
    min-height: 72px;
    padding: var(--space-3);
  }

  .collection-card-heading strong {
    font-size: 14px;
    line-height: 1.25;
  }

  .collection-grid--four .collection-card-heading {
    min-height: 88px;
  }

  .collection-header h2 {
    font-size: 34px;
  }

  .collection-subtitle {
    font-size: 16px;
  }
}

/* 窄档：单行横滑（阈值 780，覆盖原三列死区） */
@container (max-width: 780px) {
  .collection-header {
    margin-bottom: var(--space-4);
    grid-template-columns: 48px minmax(0, 1fr);
    gap: var(--space-3);
  }

  .collection-number {
    width: 44px;
    height: 44px;
    font-size: 23px;
  }

  .collection-swipe-hint {
    margin: 0 0 var(--space-3);
    padding-inline-start: 60px;
    display: block;
    color: #6a7359;
    font-family: var(--font-ui), var(--font-cjk);
    font-size: 12px;
    font-weight: 500;
    line-height: 1.4;
  }

  .collection-grid,
  .collection-grid--three,
  .collection-grid--four {
    display: flex;
    gap: var(--space-4);
    margin-inline: calc(var(--container-gutter) / -2);
    padding: var(--space-1) calc(var(--container-gutter) / 2) var(--space-3);
    overflow-x: auto;
    overscroll-behavior-inline: contain;
    scroll-snap-type: inline mandatory;
    scroll-padding-inline: calc(var(--container-gutter) / 2);
    touch-action: pan-x;
    scrollbar-width: thin;
    scrollbar-color: rgba(10, 70, 42, 0.35) transparent;
  }

  .collection-grid::-webkit-scrollbar {
    height: 6px;
  }

  .collection-grid::-webkit-scrollbar-thumb {
    border-radius: 999px;
    background: rgba(10, 70, 42, 0.35);
  }

  .collection-strip-nav--prev {
    left: calc(var(--container-gutter) / 2);
  }

  .collection-strip-nav--next {
    right: calc(var(--container-gutter) / 2);
  }

  .collection-grid.is-dragging {
    scroll-snap-type: none;
    cursor: grabbing;
  }

  .collection-grid.is-dragging .collection-card,
  .collection-grid.is-dragging .collection-card:hover {
    transform: none;
    cursor: grabbing;
  }

  .collection-card {
    flex: 0 0 min(82%, 320px);
    scroll-snap-align: start;
    touch-action: pan-x;
    cursor: grab;
  }

  .collection-card:hover,
  .collection-card:focus-within {
    transform: none;
  }

  .collection-card-zoom {
    touch-action: manipulation;
    cursor: zoom-in;
  }
}

@media (max-width: 680px) {
  .collections-hero {
    padding: var(--space-10) 0 var(--space-8);
  }

  .collections-hero h1 {
    font-size: 38px;
  }

  .material-collection {
    padding: var(--space-10) 0;
  }

  .collection-header h2 {
    font-size: 30px;
  }

  .collection-subtitle {
    font-size: 16px;
  }

  .collection-card-heading {
    min-height: 72px;
  }

  .collections-return-wrap {
    padding-block: var(--space-10);
  }

  .collections-return {
    align-items: flex-start;
    font-size: 15px;
  }

  .collections-lightbox {
    width: 96vw;
  }

  .collections-lightbox-inner {
    padding: var(--space-4);
  }

  .collections-lightbox img {
    max-height: 80vh;
  }
}

@media (prefers-reduced-motion: reduce) {
  .collection-card,
  .collection-card-media img,
  .collection-card-zoom,
  .collection-strip-nav,
  .collections-return,
  .collections-lightbox-close {
    transition: none;
  }
}