:root {
  --paper: #f4f2ed;
  --paper-deep: #ebe7df;
  --ink: #191816;
  --muted: #746f67;
  --hairline: rgba(25, 24, 22, 0.16);
  --cinnabar: #b43a2f;
  --cinnabar-soft: rgba(180, 58, 47, 0.1);
  --serif: "FZSongKeBenXiuKaiS-R-GB", "STSong", "Songti SC", "Noto Serif CJK SC", serif;
  --sans: "Microsoft YaHei UI", "PingFang SC", "Noto Sans CJK SC", sans-serif;
  --page-pad: clamp(18px, 3vw, 48px);
  color-scheme: light;
}

* { box-sizing: border-box; }

html {
  background: var(--paper);
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  min-height: 100vh;
  color: var(--ink);
  background-color: var(--paper);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180' viewBox='0 0 180 180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.82' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.045'/%3E%3C/svg%3E");
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body.viewer-open { overflow: hidden; }

button { font: inherit; }

.masthead {
  position: relative;
  border-bottom: 1px solid var(--ink);
  margin: 0 var(--page-pad);
}

.masthead__inner {
  min-height: 118px;
  display: flex;
  align-items: center;
  gap: 14px;
  position: relative;
}

.masthead h1 {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(2.6rem, 5vw, 5rem);
  font-weight: 800;
  letter-spacing: 0.025em;
  line-height: 1;
}

.seal {
  flex: 0 0 auto;
  display: grid;
  place-content: center;
  width: 30px;
  height: 44px;
  border: 1px solid currentColor;
  border-radius: 45% 42% 44% 40%;
  color: var(--cinnabar);
  font-family: var(--serif);
  font-size: 13px;
  font-weight: 700;
  line-height: 1.05;
}

.masthead__note {
  margin: 0 0 4px auto;
  color: #4b4742;
  font-family: var(--serif);
  font-size: 0.86rem;
  letter-spacing: 0.42em;
  white-space: nowrap;
}

.filter-panel {
  position: sticky;
  top: 0;
  z-index: 20;
  background: color-mix(in srgb, var(--paper) 94%, transparent);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--hairline);
}

.filter-panel__inner { padding: 0 var(--page-pad); }

.filter-rail {
  display: flex;
  align-items: center;
  overflow-x: auto;
  overscroll-behavior-x: contain;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

.filter-rail::-webkit-scrollbar { display: none; }

.filter-rail--primary {
  min-height: 68px;
  gap: clamp(12px, 2.5vw, 34px);
  border-bottom: 1px solid var(--hairline);
}

.filter-rail--secondary {
  min-height: 54px;
  gap: 8px;
}

.filter-button {
  appearance: none;
  flex: 0 0 auto;
  min-height: 42px;
  border: 0;
  border-radius: 2px;
  color: var(--ink);
  background: transparent;
  cursor: pointer;
  white-space: nowrap;
  transition: color 160ms ease, background-color 160ms ease, transform 160ms ease;
}

.filter-button--primary {
  padding: 9px 15px;
  font-family: var(--serif);
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.filter-button--primary[aria-pressed="true"] {
  color: #fff;
  background: var(--cinnabar);
}

.filter-button--secondary {
  padding: 7px 13px;
  color: #3f3b36;
  font-family: var(--serif);
  font-size: 0.94rem;
}

.filter-button--secondary[aria-pressed="true"] {
  color: var(--cinnabar);
  background: var(--cinnabar-soft);
  box-shadow: inset 0 0 0 1px rgba(180, 58, 47, 0.15);
}

.filter-button:hover { color: var(--cinnabar); }
.filter-button--primary[aria-pressed="true"]:hover { color: #fff; }
.filter-button:active { transform: translateY(1px); }
.filter-button:focus-visible,
.avatar-card:focus-visible,
.icon-button:focus-visible {
  outline: 2px solid var(--cinnabar);
  outline-offset: 3px;
}

.result-line {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 44px;
  color: var(--muted);
  font-family: var(--serif);
  font-size: 0.88rem;
}

.grid-mark {
  display: grid;
  grid-template-columns: repeat(2, 6px);
  gap: 3px;
}

.grid-mark i {
  width: 6px;
  height: 6px;
  background: var(--cinnabar);
}

.gallery {
  display: grid;
  grid-template-columns: repeat(8, minmax(0, 1fr));
  gap: 9px;
  padding: 0 var(--page-pad) 28px;
}

.avatar-card {
  position: relative;
  display: block;
  min-width: 0;
  aspect-ratio: 1;
  padding: 0;
  border: 1px solid rgba(25, 24, 22, 0.11);
  border-radius: 1px;
  overflow: hidden;
  background: #f8f7f3;
  cursor: zoom-in;
  content-visibility: auto;
  contain-intrinsic-size: 1px 250px;
}

.avatar-card[hidden] { display: none; }

.avatar-card img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 360ms cubic-bezier(.2,.75,.25,1), filter 220ms ease;
}

.avatar-card__caption {
  position: absolute;
  inset: auto 0 0;
  padding: 32px 10px 9px;
  color: #fff;
  background: linear-gradient(to bottom, transparent, rgba(18, 17, 15, 0.76));
  font-family: var(--serif);
  font-size: 0.82rem;
  line-height: 1.25;
  text-align: left;
  opacity: 0;
  transform: translateY(4px);
  transition: opacity 180ms ease, transform 180ms ease;
  pointer-events: none;
}

.avatar-card:hover img { transform: scale(1.025); }
.avatar-card:hover .avatar-card__caption,
.avatar-card:focus-visible .avatar-card__caption {
  opacity: 1;
  transform: translateY(0);
}

.endnote {
  display: flex;
  align-items: center;
  gap: 16px;
  margin: 20px auto 42px;
  width: min(480px, calc(100% - 48px));
  color: var(--muted);
  font-family: var(--serif);
  font-size: 0.78rem;
  white-space: nowrap;
}

.endnote::before,
.endnote::after {
  content: "";
  height: 1px;
  flex: 1;
  background: var(--hairline);
}

.viewer {
  width: min(980px, calc(100vw - 40px));
  max-width: none;
  max-height: calc(100dvh - 40px);
  padding: 0;
  border: 0;
  background: #f8f7f3;
  color: var(--ink);
  box-shadow: 0 26px 80px rgba(0, 0, 0, 0.34);
  overflow: visible;
}

.viewer::backdrop {
  background: rgba(15, 14, 13, 0.76);
  backdrop-filter: blur(4px);
}

.viewer__shell {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(260px, 0.8fr);
  position: relative;
  min-height: min(680px, calc(100dvh - 40px));
}

.viewer__media {
  margin: 0;
  padding: 22px 0 22px 22px;
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.viewer__media img {
  display: block;
  width: 100%;
  min-height: 0;
  flex: 1;
  object-fit: contain;
  background: var(--paper);
}

.viewer__media figcaption {
  padding-top: 10px;
  color: var(--muted);
  font-family: var(--serif);
  font-size: 0.78rem;
}

.viewer__info {
  align-self: center;
  padding: 50px 40px;
}

.viewer__number {
  margin: 0 0 10px;
  color: var(--cinnabar);
  font-family: var(--serif);
  font-size: 0.85rem;
  letter-spacing: 0.12em;
}

.viewer__info h2 {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(1.7rem, 3vw, 2.7rem);
  line-height: 1.18;
}

.viewer__rule {
  width: 34px;
  height: 1px;
  margin: 22px 0;
  background: var(--ink);
}

.viewer__tags { display: grid; gap: 12px; }

.tag-group {
  display: grid;
  grid-template-columns: 60px 1fr;
  align-items: start;
  gap: 12px;
}

.tag-group dt {
  color: var(--muted);
  font-size: 0.74rem;
  line-height: 1.8;
}

.tag-group dd {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin: 0;
}

.tag {
  padding: 5px 8px;
  border: 1px solid var(--hairline);
  border-radius: 2px;
  font-family: var(--serif);
  font-size: 0.8rem;
  line-height: 1;
}

.tag--primary {
  border-color: rgba(180, 58, 47, 0.18);
  color: #7f2e27;
  background: var(--cinnabar-soft);
}

.icon-button {
  appearance: none;
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 0;
  border-radius: 50%;
  color: var(--ink);
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  cursor: pointer;
}

.icon-button svg {
  width: 24px;
  height: 24px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.7;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.viewer__close {
  position: absolute;
  z-index: 3;
  top: 10px;
  right: 10px;
}

.viewer__nav {
  position: fixed;
  z-index: 3;
  top: 50%;
  color: #fff;
  background: rgba(15, 14, 13, 0.36);
  transform: translateY(-50%);
}

.viewer__nav--prev { left: max(12px, calc((100vw - 1080px) / 2)); }
.viewer__nav--next { right: max(12px, calc((100vw - 1080px) / 2)); }

@media (max-width: 1279px) {
  .gallery { grid-template-columns: repeat(6, minmax(0, 1fr)); }
}

@media (max-width: 959px) {
  .masthead__note { display: none; }
  .gallery { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .viewer__shell { grid-template-columns: minmax(0, 1.1fr) minmax(240px, .9fr); }
  .viewer__info { padding: 42px 28px; }
}

@media (max-width: 639px) {
  :root { --page-pad: 14px; }

  .masthead { margin: 0 var(--page-pad); }
  .masthead__inner { min-height: 88px; gap: 9px; }
  .masthead h1 { font-size: clamp(2.05rem, 10.7vw, 2.75rem); }
  .seal { width: 24px; height: 36px; font-size: 11px; }

  .filter-rail--primary {
    min-height: 58px;
    gap: 8px;
    scroll-padding-inline: var(--page-pad);
  }

  .filter-rail--secondary {
    min-height: 50px;
    margin-inline: calc(var(--page-pad) * -1);
    padding-inline: var(--page-pad);
    scroll-padding-inline: var(--page-pad);
  }

  .filter-button--primary {
    min-height: 40px;
    padding: 8px 12px;
    font-size: 0.92rem;
  }

  .filter-button--secondary {
    min-height: 38px;
    padding: 6px 10px;
    font-size: 0.86rem;
  }

  .result-line { min-height: 40px; }

  .gallery {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 5px;
    padding: 0 5px 20px;
  }

  .avatar-card { border-color: rgba(25, 24, 22, 0.09); }
  .avatar-card__caption { display: none; }

  .viewer {
    width: 100vw;
    height: 100dvh;
    max-height: none;
    margin: 0;
  }

  .viewer__shell {
    grid-template-columns: 1fr;
    grid-template-rows: minmax(0, 1fr) auto;
    height: 100dvh;
    min-height: 0;
  }

  .viewer__media {
    min-height: 0;
    padding: 58px 14px 0;
  }

  .viewer__media figcaption { padding: 8px 2px 6px; }
  .viewer__info { padding: 16px 20px 22px; }
  .viewer__info h2 { font-size: 1.55rem; }
  .viewer__rule { margin: 14px 0; }
  .viewer__tags { gap: 8px; }

  .viewer__close { top: max(8px, env(safe-area-inset-top)); right: 8px; }
  .viewer__nav { position: absolute; top: 42%; }
  .viewer__nav--prev { left: 8px; }
  .viewer__nav--next { right: 8px; }
  .endnote { margin-bottom: 28px; }
}

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