/* 低分爆图 · 封面优先的图片榜
   ────────────────────────────────────────────────────────────────
   和低粉爆文（行式榜单）不同，这一页的主角是封面本身，所以采用竖图网格
   （3:4，微信贴图的主流比例），数据和标题让位给图片。
   材质沿用工作台的浅绿玻璃：白度打底 + 细线分层，不做卡片套卡片。
   所有选择器都挂在 #image-board 下，不污染全局。
   ──────────────────────────────────────────────────────────────── */

#image-board.ib-page {
  --ib-ink: #172a23;
  --ib-body: #4a5d54;
  --ib-muted: #84968d;
  --ib-faint: #9aaba2;
  --ib-accent: #2f7f60;
  --ib-line: rgba(40, 86, 66, .12);
  --ib-line-2: rgba(40, 86, 66, .2);
  --ib-warm: #9a6428;
  --ib-warm-soft: #fdf3e7;

  position: relative;
  container-type: inline-size;
  min-width: 0;
  padding: 28px 30px 44px;
  color: var(--ib-body);
  background: transparent;
  font-family: var(--sans);
}
#image-board *,
#image-board *::before,
#image-board *::after { box-sizing: border-box; }
#image-board [hidden] { display: none !important; }
#image-board :is(a, button, input, select):focus-visible {
  outline: 3px solid var(--ib-accent);
  outline-offset: 3px;
}

/* ---------------------------------------------------------------- 页头 */
#image-board .ib-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
  padding: 24px 26px;
  margin-bottom: 20px;
  border-radius: 24px;
  background: rgba(249, 255, 250, .79);
  border: 1px solid rgba(255, 255, 255, .68);
  box-shadow: 0 8px 24px -20px rgba(53, 97, 70, .42);
  -webkit-backdrop-filter: blur(12px) saturate(115%);
  backdrop-filter: blur(12px) saturate(115%);
}
#image-board .ib-head h1 {
  margin: 0;
  font-family: var(--serif);
  font-size: 32px;
  line-height: 1.35;
  font-weight: 600;
  letter-spacing: -.018em;
  color: var(--ib-ink);
}
#image-board .ib-head p {
  margin: 11px 0 0;
  max-width: 42em;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--ib-body);
}
#image-board .ib-stamp {
  margin-left: auto;
  padding-bottom: 4px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--ib-muted);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}
#image-board .ib-stamp b { color: var(--ib-accent); font-weight: 600; }

/* ---------------------------------------------------------------- 范围切换（玻璃容器） */
#image-board .ib-scopes {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin: 0 0 4px;
  padding: 10px 14px;
  border-radius: 18px;
  background-color: rgba(255, 255, 255, .48);
  background-image: linear-gradient(135deg,
    rgba(255, 255, 255, .4) 0%, rgba(255, 255, 255, .08) 50%,
    rgba(255, 255, 255, 0) 70%, rgba(255, 255, 255, .16) 100%);
  -webkit-backdrop-filter: blur(16px) saturate(140%);
  backdrop-filter: blur(16px) saturate(140%);
  border: 1px solid rgba(255, 255, 255, .52);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .7);
}
#image-board .ib-scope {
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  padding: 9px 16px;
  border: 1px solid var(--ib-line);
  border-radius: 999px;
  background: rgba(255, 255, 255, .58);
  font: inherit;
  font-size: 13.5px;
  color: var(--ib-body);
  cursor: pointer;
  transition: background .18s ease, border-color .18s ease, color .18s ease;
}
#image-board .ib-scope:hover { border-color: var(--ib-line-2); background: #fff; }
#image-board .ib-scope n {
  font-size: 11.5px;
  color: var(--ib-faint);
  font-variant-numeric: tabular-nums;
}
#image-board .ib-scope[aria-selected="true"] {
  background: linear-gradient(180deg, #b7ddc9, #a0cfb8);
  border-color: transparent;
  color: #164e39;
  font-weight: 600;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .75), 0 8px 18px -16px rgba(34, 106, 80, .5);
}
#image-board .ib-scope[aria-selected="true"] n { color: rgba(22, 78, 57, .55); }

/* ---------------------------------------------------------------- 口径说明（收敛为内联提示） */
#image-board .ib-note {
  margin: 0 0 10px;
  padding: 7px 14px;
  border-radius: 10px;
  background: rgba(232, 244, 237, .38);
  font-size: 11.5px;
  line-height: 1.6;
  color: var(--ib-faint);
}
#image-board .ib-note b { color: var(--ib-muted); font-weight: 600; }

/* ---------------------------------------------------------------- 工具条（玻璃层） */
#image-board .ib-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 16px;
  padding: 10px 12px;
  border: 1px solid rgba(255, 255, 255, .66);
  border-radius: 14px;
  background: rgba(249, 255, 250, .72);
  box-shadow: 0 5px 16px -14px rgba(36, 67, 47, .35);
  -webkit-backdrop-filter: blur(10px) saturate(115%);
  backdrop-filter: blur(10px) saturate(115%);
}
#image-board .ib-search {
  display: flex;
  align-items: center;
  gap: 9px;
  flex: 1 1 240px;
  max-width: 360px;
  min-width: 0;
  min-height: 42px;
  padding: 0 14px;
  border: 1px solid rgba(40, 86, 66, .09);
  border-radius: 12px;
  background: rgba(255, 255, 255, .74);
  transition: border-color .18s ease, background .18s ease;
}
#image-board .ib-search svg { flex: none; color: var(--ib-faint); }
#image-board .ib-search input {
  width: 100%;
  min-width: 0;
  border: 0;
  outline: 0;
  background: none;
  font: inherit;
  font-size: 14px;
  color: var(--ib-ink);
}
#image-board .ib-search input::placeholder { color: var(--ib-faint); }
#image-board .ib-search:focus-within { border-color: var(--ib-accent); background: #fff; }

#image-board .ib-select {
  min-height: 42px;
  padding: 0 34px 0 14px;
  border: 1px solid rgba(40, 86, 66, .09);
  border-radius: 12px;
  background-color: rgba(255, 255, 255, .74);
  color: var(--ib-body);
  font: inherit;
  font-size: 13.5px;
  cursor: pointer;
  appearance: none;
  background-image:
    linear-gradient(45deg, transparent 50%, var(--ib-faint) 50%),
    linear-gradient(135deg, var(--ib-faint) 50%, transparent 50%);
  background-position: calc(100% - 18px) 19px, calc(100% - 13px) 19px;
  background-size: 5px 5px, 5px 5px;
  background-repeat: no-repeat;
}
#image-board .ib-select:hover { border-color: var(--ib-line-2); }
#image-board .ib-tail {
  margin-left: auto;
  font-size: 12px;
  color: var(--ib-faint);
  font-variant-numeric: tabular-nums;
}

/* ---------------------------------------------------------------- 赛道 */
#image-board .ib-tracks {
  display: flex;
  gap: 7px;
  overflow-x: auto;
  padding: 4px 2px 12px;
  margin-bottom: 6px;
  border-bottom: 1px solid var(--ib-line);
  scrollbar-width: none;
}
#image-board .ib-tracks::-webkit-scrollbar { display: none; }
#image-board .ib-track {
  flex: none;
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  padding: 7px 13px;
  border: 1px solid transparent;
  border-radius: 999px;
  background: rgba(255, 255, 255, .46);
  font: inherit;
  font-size: 13px;
  color: var(--ib-body);
  white-space: nowrap;
  cursor: pointer;
  transition: background .18s ease, color .18s ease, border-color .18s ease;
}
#image-board .ib-track:hover { border-color: var(--ib-line); background: rgba(255, 255, 255, .86); }
#image-board .ib-track n { font-size: 12px; line-height: 1.5; color: var(--ib-muted); font-variant-numeric: tabular-nums; }
#image-board .ib-track.is-active {
  background: #e1eee2;
  border-color: transparent;
  color: #285b3a;
  font-weight: 600;
}
#image-board .ib-track.is-active n { color: rgba(29, 92, 67, .6); }

/* ---------------------------------------------------------------- 网格 */
#image-board .ib-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(212px, 1fr));
  gap: 16px;
  align-items: start;
}

#image-board .ib-card {
  position: relative;
  display: flex;
  flex-direction: column;
  min-width: 0;
  padding: 8px 8px 12px;
  border: 1px solid rgba(255, 255, 255, .7);
  border-radius: 18px;
  background: rgba(249, 255, 250, .72);
  -webkit-backdrop-filter: blur(12px) saturate(115%);
  backdrop-filter: blur(12px) saturate(115%);
  box-shadow: 0 8px 24px -20px rgba(53, 97, 70, .42);
  transition: transform .22s ease, box-shadow .22s ease, border-color .22s ease, background-color .22s ease;
}
#image-board .ib-card:hover {
  transform: translateY(-3px);
  border-color: rgba(255, 255, 255, .72);
  background-color: rgba(255, 255, 255, .74);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .9), 0 20px 40px -26px rgba(24, 64, 46, .6);
}

/* 封面：3:4 竖图，图片进入后用淡入削掉加载突变 */
#image-board .ib-cover {
  position: relative;
  aspect-ratio: 3 / 4;
  overflow: hidden;
  border-radius: 12px;
  background: linear-gradient(160deg, #eef3ef, #e3ebe5);
}
#image-board .ib-cover img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transition: opacity .34s ease, transform .5s ease;
}
#image-board .ib-card:hover .ib-cover img { transform: scale(1.035); }
#image-board .ib-cover img.is-ready { opacity: 1; }

/* 取不到图时的占位：不显示破图图标，改用浅色块 + 标题前两个字 */
#image-board .ib-fallback {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 12px;
  text-align: center;
  font-family: var(--serif);
  font-size: 26px;
  letter-spacing: .08em;
  color: rgba(23, 68, 50, .5);
  background:
    radial-gradient(120% 90% at 20% 0%, rgba(183, 221, 201, .85), transparent 62%),
    linear-gradient(150deg, #eef5f0, #dfe9e2);
}

#image-board .ib-rank {
  position: absolute;
  top: 8px;
  left: 8px;
  min-width: 24px;
  height: 24px;
  padding: 0 7px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  background: rgba(18, 45, 34, .74);
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
  font-family: var(--serif);
  font-size: 12.5px;
  font-weight: 600;
  color: #fff;
  font-variant-numeric: tabular-nums;
}
#image-board .ib-rank.is-top { background: #b8762c; }

#image-board .ib-kind {
  position: absolute;
  top: 8px;
  right: 8px;
  padding: 3px 8px;
  border-radius: 999px;
  font-size: 12px;
  background: rgba(255, 255, 255, .88);
  color: #3c6a55;
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
}

/* 封面底部压一层渐变条，把「阅读 / 分享」直接压在图上，节省纵向空间 */
#image-board .ib-onimg {
  position: absolute;
  inset: auto 0 0 0;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 8px;
  padding: 26px 10px 9px;
  background: linear-gradient(to top, rgba(12, 32, 24, .8), rgba(12, 32, 24, .28) 52%, transparent);
  color: #fff;
  pointer-events: none;
}
#image-board .ib-read {
  font-size: 15px;
  font-weight: 650;
  line-height: 1.2;
  letter-spacing: -.01em;
  font-variant-numeric: tabular-nums;
  text-shadow: 0 1px 6px rgba(0, 0, 0, .4);
}
#image-board .ib-read small { margin-left: 2px; font-size: 12px; font-weight: 500; opacity: .82; }
#image-board .ib-share {
  font-size: 11px;
  opacity: .9;
  font-variant-numeric: tabular-nums;
}
#image-board .ib-boost {
  padding: 2px 7px;
  border-radius: 6px;
  background: rgba(255, 214, 156, .95);
  color: #6b3f0e;
  font-size: 11px;
  font-weight: 650;
  font-variant-numeric: tabular-nums;
}

/* 卡片正文 */
#image-board .ib-body { padding: 10px 4px 0; min-width: 0; }
#image-board .ib-title {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin: 0 0 7px;
  font-family: var(--serif);
  font-size: 15.5px;
  line-height: 1.42;
  font-weight: 600;
  color: var(--ib-ink);
  text-decoration: none;
}
#image-board .ib-title:hover { color: var(--ib-accent); }
#image-board .ib-sub {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin: 0 0 9px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--ib-faint);
}
#image-board .ib-facts {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
  font-size: 11px;
  color: var(--ib-muted);
}
#image-board .ib-facts em {
  padding: 2px 7px;
  border-radius: 6px;
  background: rgba(40, 86, 66, .055);
  font-style: normal;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}
#image-board .ib-facts em.is-warm { background: var(--ib-warm-soft); color: var(--ib-warm); }

#image-board .ib-actions {
  display: flex;
  gap: 8px;
  margin-top: 11px;
}
#image-board .ib-act {
  flex: 1;
  min-height: 34px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--ib-line);
  border-radius: 10px;
  background: rgba(255, 255, 255, .8);
  font-size: 12.5px;
  color: var(--ib-body);
  text-decoration: none;
  cursor: pointer;
  transition: border-color .16s ease, color .16s ease, background .16s ease;
}
#image-board .ib-act:hover { border-color: var(--ib-accent); color: var(--ib-accent); background: #fff; }
#image-board .ib-act.is-primary {
  border-color: transparent;
  background: #dcefe4;
  color: #1d5c43;
  font-weight: 600;
}
#image-board .ib-act.is-primary:hover { background: #cbe7d8; color: #164e39; }

/* ---------------------------------------------------------------- 状态 */
#image-board .ib-empty {
  padding: 64px 20px;
  text-align: center;
  color: var(--ib-muted);
}
#image-board .ib-empty strong {
  display: block;
  margin-bottom: 8px;
  font-family: var(--serif);
  font-size: 20px;
  font-weight: 600;
  color: var(--ib-ink);
}
#image-board .ib-empty p { margin: 0; font-size: 13px; line-height: 1.7; }

/* 骨架屏：切换赛道时先占位，避免页面高度塌陷 */
#image-board .ib-skeleton .ib-cover {
  background: linear-gradient(100deg, #eef3ef 30%, #f7faf8 50%, #eef3ef 70%);
  background-size: 220% 100%;
  animation: ib-shimmer 1.15s linear infinite;
}
@keyframes ib-shimmer {
  from { background-position: 120% 0; }
  to { background-position: -80% 0; }
}
@media (prefers-reduced-motion: reduce) {
  #image-board .ib-card,
  #image-board .ib-cover img { transition: none; }
  #image-board .ib-skeleton .ib-cover { animation: none; }
}

/* 全局 shell 会给所有 section 注入实色底，爆图页需透出浅绿环境光。 */
body.atelier.image-board-body #image-board.ib-page {
  background: transparent !important;
}

/* ---------------------------------------------------------------- 窄屏 */
@media (min-width: 1101px) {
  body.atelier.image-board-body {
    background: radial-gradient(ellipse at 30% 10%, #b4dec5 0, transparent 65%), linear-gradient(135deg, #c5e3d0, #e0ecdc) !important;
    background-attachment: fixed !important;
  }
  body.atelier.image-board-body .app-shell {
    display: block !important;
    max-width: none !important;
    padding: 28px 40px 30px 0 !important;
    background: transparent !important;
  }
  body.atelier.image-board-body #image-board.ib-page {
    width: 100% !important;
    max-width: none !important;
    padding: 0 !important;
    margin: 0 !important;
  }
}
@media (min-width: 1101px) and (max-width: 1279px) {
  body.atelier.image-board-body .app-shell { padding-right: 28px !important; }
}
@supports not (backdrop-filter: blur(12px)) {
  #image-board .ib-head, #image-board .ib-bar, #image-board .ib-card { background: #f3fbf5; }
}
@media (prefers-reduced-transparency: reduce) {
  #image-board .ib-head, #image-board .ib-bar, #image-board .ib-card {
    background: #f3fbf5;
    -webkit-backdrop-filter: none;
    backdrop-filter: none;
  }
}

@container (max-width: 620px) {
  #image-board .ib-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 11px; }
  #image-board .ib-title { font-size: 13.5px; }
  #image-board .ib-sub { display: none; }
  #image-board .ib-actions .ib-act.is-primary { display: none; }
}
@media (max-width: 640px) {
  #image-board.ib-page { padding: 20px 15px 44px; }
  #image-board .ib-head { padding: 20px; border-radius: 20px; }
  #image-board .ib-head h1 { font-size: 28px; }
  #image-board .ib-head p { font-size: 14px; }
  #image-board .ib-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
  #image-board .ib-card { padding: 7px 7px 10px; border-radius: 14px; }
  #image-board .ib-title { font-size: 13px; }
  #image-board .ib-sub { display: none; }
  #image-board .ib-actions { display: none; }
  #image-board .ib-tail { width: 100%; margin-left: 0; }
  #image-board .ib-select { flex: 1 1 auto; }
}