:root {
  --paper: #f3f0e9;
  --ink: #181816;
  --muted: #6c6962;
  --line: rgba(24, 24, 22, 0.18);
  --gutter: clamp(16px, 2.5vw, 40px);
  color-scheme: light;
  font-family: Inter, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  font-synthesis: none;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
}

body.is-locked {
  overflow: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  color: inherit;
  font: inherit;
}

img {
  display: block;
  max-width: 100%;
}

.home-header,
.gallery-header,
.site-footer {
  margin-inline: var(--gutter);
}

.home-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  padding-block: 22px;
  border-bottom: 1px solid var(--line);
}

.brand {
  display: inline-flex;
  flex-direction: column;
  gap: 3px;
}

.brand-cn {
  font-size: 20px;
  font-weight: 650;
  letter-spacing: 0.08em;
}

.brand-en,
.edition-note,
.hero-kicker,
.collection-index,
.collection-count,
.collection-open,
.section-number,
.image-total,
.category-nav,
.site-footer,
.image-code,
.lightbox-bar,
.lightbox-loader {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.13em;
  line-height: 1.2;
}

.brand-en {
  color: var(--muted);
  font-size: 8px;
}

.edition-note {
  display: flex;
  gap: 28px;
  padding-top: 4px;
  color: var(--muted);
}

.hero {
  min-height: min(78vh, 820px);
  margin-inline: var(--gutter);
  padding: clamp(68px, 12vh, 140px) 0 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
}

.hero-kicker {
  margin: 0;
  color: var(--muted);
}

.hero-intro {
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--muted);
  font-size: 8px;
  font-weight: 600;
  letter-spacing: 0.14em;
}

.hero-particle-cover {
  min-height: clamp(540px, 67vh, 760px);
  margin-block: clamp(18px, 3vh, 38px);
}

.hero-title-index,
.particle-title-meta,
.particle-label {
  color: var(--muted);
  font-size: 8px;
  font-weight: 650;
  letter-spacing: 0.14em;
}

.particle-stage {
  position: relative;
  min-width: 0;
  min-height: clamp(540px, 67vh, 760px);
  overflow: hidden;
  border-block: 1px solid var(--line);
  cursor: crosshair;
  touch-action: pan-y;
}

.particle-stage::before {
  position: absolute;
  z-index: 2;
  top: 18px;
  left: 18px;
  width: 44px;
  height: 1px;
  background: var(--line);
  content: "";
  pointer-events: none;
}

#logo-particles {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
}

.particle-fallback {
  position: absolute;
  inset: 45% auto auto 48%;
  width: min(91%, 1180px);
  max-height: 88%;
  object-fit: contain;
  opacity: 0.86;
  transform: translate(-50%, -50%);
  transition: opacity 400ms ease;
  pointer-events: none;
}

.particle-stage.is-ready .particle-fallback {
  opacity: 0;
}

.particle-title {
  position: absolute;
  z-index: 3;
  right: clamp(16px, 2.5vw, 38px);
  bottom: clamp(18px, 3vw, 40px);
  display: grid;
  grid-template-columns: auto minmax(0, auto);
  align-items: end;
  gap: 8px 18px;
  text-align: right;
  pointer-events: none;
}

.particle-title .hero-title-index {
  align-self: start;
  padding-top: 0.55em;
}

.particle-title h1 {
  grid-column: 2;
  margin: 0;
  font-family: Inter, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: clamp(76px, 10vw, 154px);
  font-weight: 620;
  letter-spacing: -0.115em;
  line-height: 0.78;
}

.particle-title-meta {
  grid-column: 2;
  display: flex;
  justify-content: flex-end;
  gap: clamp(18px, 3vw, 46px);
  margin-top: 8px;
}

.particle-title-meta p {
  margin: 0;
}

.particle-label {
  position: absolute;
  z-index: 2;
  top: 16px;
  right: 16px;
  line-height: 1.45;
  text-align: right;
  pointer-events: none;
}

.hero-bottom {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-top: 54px;
}

.hero-bottom p {
  max-width: 420px;
  margin: 0;
  color: var(--muted);
  font-size: clamp(12px, 1.2vw, 15px);
  line-height: 1.7;
}

.hero-legend {
  display: flex;
  gap: 16px;
  color: var(--muted);
  font-size: 8px;
  font-weight: 650;
  letter-spacing: 0.14em;
}

.collections {
  margin: 0 var(--gutter);
}

.collection-card {
  display: grid;
  grid-template-columns: minmax(0, 1.7fr) minmax(250px, 0.7fr);
  gap: clamp(22px, 5vw, 90px);
  padding-block: clamp(44px, 7vw, 100px);
  border-bottom: 1px solid var(--line);
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 700ms ease, transform 700ms ease;
}

.collection-card.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.collection-card:nth-child(even) {
  grid-template-columns: minmax(250px, 0.7fr) minmax(0, 1.7fr);
}

.collection-card:nth-child(even) .collection-image {
  grid-column: 2;
}

.collection-card:nth-child(even) .collection-meta {
  grid-column: 1;
  grid-row: 1;
}

.collection-image {
  position: relative;
  min-height: 340px;
  max-height: 72vh;
  overflow: hidden;
  background: #ddd8ce;
}

.collection-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 900ms cubic-bezier(0.2, 0.65, 0.2, 1);
}

.collection-open {
  position: absolute;
  right: 12px;
  bottom: 12px;
  padding: 10px 12px;
  background: rgba(243, 240, 233, 0.92);
  opacity: 0;
  transform: translateY(6px);
  transition: opacity 260ms ease, transform 260ms ease;
}

.collection-card:hover .collection-image img {
  transform: scale(1.018);
}

.collection-card:hover .collection-open {
  opacity: 1;
  transform: translateY(0);
}

.collection-meta {
  display: grid;
  grid-template-columns: auto 1fr;
  align-content: start;
  gap: 12px 18px;
  padding-top: 2px;
}

.collection-index {
  color: var(--muted);
}

.collection-meta h2 {
  margin: -5px 0 0;
  font-family: Inter, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: clamp(40px, 5vw, 82px);
  font-weight: 500;
  letter-spacing: -0.055em;
  line-height: 0.95;
}

.collection-count {
  grid-column: 2;
  color: var(--muted);
}

.collection-meta p {
  grid-column: 2;
  max-width: 240px;
  margin: 32px 0 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.6;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding-block: 24px 32px;
  color: var(--muted);
}

.gallery-header {
  position: relative;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 24px;
  padding-block: 20px 22px;
  border-bottom: 1px solid var(--line);
}

.brand--small .brand-cn {
  font-size: 16px;
}

.gallery-heading {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: end;
  gap: 16px;
  padding-top: clamp(42px, 8vw, 110px);
}

.gallery-heading h1 {
  margin: 0;
  font-family: Inter, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: clamp(68px, 12vw, 190px);
  font-weight: 500;
  letter-spacing: -0.075em;
  line-height: 0.76;
}

.section-number,
.image-total {
  padding-bottom: 4px;
  color: var(--muted);
}

.category-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 10px 20px;
  color: var(--muted);
}

.category-nav a {
  position: relative;
  padding-block: 2px 7px;
}

.category-nav a::after {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  height: 1px;
  background: currentColor;
  content: "";
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 220ms ease;
}

.category-nav a:hover::after,
.category-nav a[aria-current="page"]::after {
  transform: scaleX(1);
  transform-origin: left;
}

.masonry {
  min-height: 70vh;
  margin: 0 var(--gutter);
  padding-block: var(--gutter);
  column-count: 2;
  column-gap: clamp(9px, 1.2vw, 18px);
}

.gallery-card {
  position: relative;
  display: block;
  width: 100%;
  margin: 0 0 clamp(9px, 1.2vw, 18px);
  padding: 0;
  overflow: hidden;
  border: 0;
  background: #dfdbd2;
  cursor: zoom-in;
  break-inside: avoid;
}

.gallery-card img {
  width: 100%;
  height: auto;
  opacity: 0;
  transform: scale(1.008);
  transition: opacity 480ms ease, transform 600ms ease;
}

.gallery-card img.is-loaded {
  opacity: 1;
  transform: scale(1);
}

.gallery-card::after {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 65%, rgba(0, 0, 0, 0.42));
  content: "";
  opacity: 0;
  transition: opacity 240ms ease;
}

.image-code {
  position: absolute;
  z-index: 1;
  right: 10px;
  bottom: 9px;
  color: #fff;
  opacity: 0;
  transform: translateY(4px);
  transition: opacity 240ms ease, transform 240ms ease;
}

.gallery-card:hover::after,
.gallery-card:focus-visible::after,
.gallery-card:hover .image-code,
.gallery-card:focus-visible .image-code {
  opacity: 1;
}

.gallery-card:hover .image-code,
.gallery-card:focus-visible .image-code {
  transform: translateY(0);
}

.gallery-card:focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: 3px;
}

.gallery-status {
  min-height: 42vh;
  display: grid;
  place-items: center;
  color: var(--muted);
  font-size: 11px;
  letter-spacing: 0.12em;
}

.gallery-status[hidden] {
  display: none;
}

.lightbox {
  position: fixed;
  z-index: 20;
  inset: 0;
  display: grid;
  grid-template-columns: 54px minmax(0, 1fr) 54px;
  grid-template-rows: 54px minmax(0, 1fr);
  background: rgba(15, 15, 14, 0.97);
  color: #f5f2eb;
  animation: lightbox-in 180ms ease both;
}

.lightbox[hidden] {
  display: none;
}

.lightbox-bar {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  padding-inline: 18px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.18);
}

.lightbox-close {
  justify-self: end;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  min-width: 54px;
  min-height: 40px;
  padding: 7px 0 7px 12px;
  border: 0;
  background: transparent;
  color: inherit;
  cursor: pointer;
  font-size: 11px;
}

.lightbox-close-icon {
  font-size: 20px;
  font-weight: 300;
  line-height: 1;
}

.lightbox-tools {
  position: absolute;
  z-index: 2;
  top: 68px;
  left: 50%;
  display: flex;
  align-items: center;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.2);
  background: rgba(20, 20, 19, 0.82);
  backdrop-filter: blur(12px);
  transform: translateX(-50%);
}

.lightbox-tools button,
.lightbox-tools span {
  min-width: 42px;
  padding: 8px 9px;
  border: 0;
  border-right: 1px solid rgba(255, 255, 255, 0.15);
  background: transparent;
  color: inherit;
  font-size: 9px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-align: center;
}

.lightbox-tools button {
  cursor: pointer;
}

.lightbox-tools button:hover {
  background: rgba(255, 255, 255, 0.1);
}

.lightbox-tools span {
  min-width: 58px;
  border-right: 0;
  color: rgba(255, 255, 255, 0.66);
}

.lightbox-stage {
  position: relative;
  grid-column: 2;
  grid-row: 2;
  min-width: 0;
  min-height: 0;
  overflow: auto;
  overscroll-behavior: contain;
  scrollbar-color: rgba(255, 255, 255, 0.34) transparent;
  touch-action: pan-x pan-y;
}

.lightbox-stage.is-draggable {
  cursor: grab;
}

.lightbox-stage.is-dragging {
  cursor: grabbing;
  user-select: none;
}

.lightbox-canvas {
  display: grid;
  min-width: 100%;
  min-height: 100%;
  padding: clamp(42px, 5vw, 78px) clamp(12px, 2vw, 28px) clamp(12px, 2vw, 28px);
  place-items: center;
}

.lightbox-stage img {
  width: auto;
  height: auto;
  max-width: none;
  max-height: none;
  object-fit: contain;
  opacity: 0;
  user-select: none;
  -webkit-user-drag: none;
  transition: opacity 240ms ease;
}

.lightbox-stage img.is-loaded {
  opacity: 1;
}

.lightbox-loader {
  position: absolute;
  z-index: 3;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  background: rgba(20, 20, 19, 0.78);
  backdrop-filter: blur(8px);
  color: rgba(255, 255, 255, 0.55);
}

.lightbox-loader[hidden] {
  display: none;
}

.lightbox-loader-spinner {
  width: 12px;
  height: 12px;
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-top-color: #fff;
  border-radius: 50%;
  animation: loader-spin 800ms linear infinite;
}

@keyframes loader-spin {
  to { transform: rotate(360deg); }
}

.lightbox-nav {
  grid-row: 2;
  border: 0;
  background: transparent;
  color: inherit;
  cursor: pointer;
  font-size: 18px;
  transition: background 180ms ease;
}

.lightbox-nav:hover {
  background: rgba(255, 255, 255, 0.06);
}

.lightbox-prev {
  grid-column: 1;
}

.lightbox-next {
  grid-column: 3;
}

@keyframes lightbox-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

@media (min-width: 760px) {
  .masonry { column-count: 3; }
}

@media (min-width: 1180px) {
  .masonry { column-count: 4; }
}

@media (min-width: 1680px) {
  .masonry { column-count: 5; }
}

@media (max-width: 720px) {
  .edition-note span:first-child,
  .brand--small .brand-en {
    display: none;
  }

  .hero {
    min-height: 72vh;
    padding-top: 90px;
  }

  .hero-particle-cover {
    min-height: min(68vh, 580px);
    margin-block: 26px 32px;
  }

  .particle-stage {
    min-height: min(68vh, 580px);
    border-block: 1px solid var(--line);
  }

  .particle-title {
    right: 10px;
    bottom: 16px;
    display: block;
    max-width: calc(100% - 20px);
  }

  .particle-title .hero-title-index {
    display: block;
    margin-bottom: 8px;
  }

  .particle-title h1 {
    font-size: clamp(62px, 22vw, 88px);
    line-height: 0.82;
  }

  .particle-title-meta {
    display: block;
    margin-top: 12px;
    font-size: 6px;
    line-height: 1.8;
  }

  .particle-title-meta span {
    display: none;
  }

  .particle-label {
    top: 12px;
    right: 10px;
    font-size: 6px;
  }

  .collection-card,
  .collection-card:nth-child(even) {
    display: flex;
    flex-direction: column;
    gap: 22px;
  }

  .collection-card:nth-child(even) .collection-image,
  .collection-card:nth-child(even) .collection-meta {
    grid-column: auto;
    grid-row: auto;
  }

  .collection-image {
    min-height: 280px;
    max-height: 62vh;
  }

  .collection-meta p {
    margin-top: 12px;
  }

  .gallery-header {
    grid-template-columns: 1fr;
  }

  .category-nav {
    justify-content: flex-start;
  }

  .gallery-heading {
    padding-top: 36px;
  }

  .gallery-heading h1 {
    font-size: clamp(64px, 24vw, 112px);
  }

  .lightbox {
    grid-template-columns: 1fr;
    grid-template-rows: 64px minmax(0, 1fr) 72px;
  }

  .lightbox-bar {
    position: relative;
    z-index: 5;
    grid-column: 1;
    grid-row: 1;
    padding-inline: 12px;
    padding-top: env(safe-area-inset-top);
    background: rgba(15, 15, 14, 0.96);
  }

  .lightbox-close {
    position: fixed;
    z-index: 8;
    top: calc(8px + env(safe-area-inset-top));
    right: 8px;
    min-width: 76px;
    min-height: 48px;
    justify-content: center;
    padding: 0 12px;
    border: 1px solid rgba(255, 255, 255, 0.28);
    border-radius: 24px;
    background: rgba(34, 34, 32, 0.94);
    backdrop-filter: blur(12px);
    font-size: 12px;
  }

  .lightbox-close-icon {
    font-size: 25px;
  }

  .lightbox-tools {
    position: relative;
    top: auto;
    left: auto;
    grid-column: 1;
    grid-row: 3;
    align-self: stretch;
    justify-self: stretch;
    justify-content: center;
    border-width: 1px 0 0;
    background: rgba(15, 15, 14, 0.98);
    transform: none;
    padding-bottom: env(safe-area-inset-bottom);
  }

  .lightbox-tools button {
    flex: 1 1 0;
    min-width: 56px;
    min-height: 58px;
    padding: 10px;
    font-size: 12px;
  }

  .lightbox-tools span {
    display: none;
  }

  .lightbox-stage {
    grid-column: 1;
    grid-row: 2;
  }

  .lightbox-canvas {
    padding: 26px 10px;
  }

  .lightbox-nav {
    position: fixed;
    z-index: 6;
    top: 50%;
    width: 48px;
    height: 76px;
    border: 1px solid rgba(255, 255, 255, 0.18);
    background: rgba(20, 20, 19, 0.78);
    backdrop-filter: blur(8px);
    transform: translateY(-50%);
  }

  .lightbox-prev {
    left: 0;
  }

  .lightbox-next {
    right: 0;
  }

  .lightbox-loader {
    max-width: calc(100% - 32px);
    font-size: 9px;
  }
}

@media (max-width: 360px) {
  .masonry {
    column-count: 1;
  }
}

@media (hover: none) {
  .gallery-card:active::after,
  .gallery-card:active .image-code {
    opacity: 1;
  }

  .collection-open {
    display: none;
  }
}

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