/* 首页宫格 */
.mosaic {
  width: min(1200px, calc(100% - 48px));
  margin: 28px auto 56px;
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  grid-template-rows: 180px 180px 180px 220px;
  gap: 12px;
}
.mosaic a {
  position: relative;
  overflow: hidden;
  display: block;
  background: #dfe3e8;
}
.mosaic img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.tile-hq { grid-row: 1 / 4; }
.tile-service { grid-column: 1 / -1; }

@media (max-width: 800px) {
  .mosaic {
    grid-template-columns: 1fr;
    grid-template-rows: none;
  }
  .tile-hq, .tile-service { grid-row: auto; grid-column: auto; }
  .mosaic a { height: 200px; }
}