/* =========================================================
   社区页样式 — Mosaic 图片墙
   ========================================================= */

.mosaic {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  grid-auto-rows: 90px;
  gap: var(--s-3);
}
.mosaic__item {
  position: relative;
  overflow: hidden;
  border-radius: var(--r-md);
  background: var(--c-bg-alt);
  transition: transform var(--t-med) var(--ease-out);
  cursor: pointer;
}
.mosaic__item:hover { transform: scale(1.005); }
.mosaic__item img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.6s var(--ease-out); }
.mosaic__item:hover img { transform: scale(1.04); }
.mosaic__item .placeholder { width: 100%; height: 100%; border: 0; border-radius: 0; font-size: 0.7rem; }

.mosaic__item--wide  { grid-column: span 6; grid-row: span 3; }
.mosaic__item--tall  { grid-column: span 3; grid-row: span 4; }
.mosaic__item--sq    { grid-column: span 3; grid-row: span 3; }
.mosaic__item--half  { grid-column: span 3; grid-row: span 2; }
.mosaic__item--mini  { grid-column: span 3; grid-row: span 2; }

.mosaic__caption {
  position: absolute; left: 0; right: 0; bottom: 0;
  padding: var(--s-3) var(--s-4);
  background: linear-gradient(to top, rgba(14,14,16,0.78), rgba(14,14,16,0));
  color: #fff;
  font-size: var(--fs-sm);
  letter-spacing: 0.02em;
  opacity: 1;
  transform: none;
  transition: all var(--t-med) var(--ease-out);
}

.mosaic__placeholder-tag {
  position: absolute; top: 12px; left: 12px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  color: var(--c-primary-2);
  background: rgba(255,255,255,0.92);
  padding: 0.25rem 0.55rem;
  border-radius: 999px;
}

@media (max-width: 880px) {
  .mosaic { grid-template-columns: repeat(6, 1fr); }
  .mosaic__item--wide  { grid-column: span 6; grid-row: span 3; }
  .mosaic__item--tall  { grid-column: span 3; grid-row: span 3; }
  .mosaic__item--sq    { grid-column: span 3; grid-row: span 2; }
  .mosaic__item--half  { grid-column: span 3; grid-row: span 2; }
  .mosaic__item--mini  { grid-column: span 3; grid-row: span 2; }
}
@media (max-width: 540px) {
  .mosaic { grid-auto-rows: 80px; }
  .mosaic__item--wide, .mosaic__item--tall, .mosaic__item--sq { grid-column: span 6; grid-row: span 2; }
  .mosaic__item--half, .mosaic__item--mini { grid-column: span 3; grid-row: span 2; }
}

/* —— 状态条 ——————————————————————— */
.community-stats {
  display: grid; grid-template-columns: 1fr 1fr; gap: var(--s-6);
  padding: var(--s-8) 0; border-top: 1px solid var(--c-line);
}
@media (max-width: 540px) {
  .community-stats { grid-template-columns: 1fr; }
}
.cs__label { font-family: var(--font-mono); font-size: 0.7rem; letter-spacing: 0.16em; color: var(--c-mute); text-transform: uppercase; margin-bottom: var(--s-2); }
.cs__value { font-size: var(--fs-3xl); font-weight: 400; letter-spacing: -0.02em; }
.cs__desc { color: var(--c-mute); margin-top: var(--s-2); font-size: var(--fs-sm); max-width: 40ch; }