.bt-hk-section {
  padding: 24px 0 10px;
}
.bt-hk-container {
  width: min(1280px, calc(100% - 40px));
  margin: 0 auto;
}
.bt-hk-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.bt-hk-card {
  display: block;
  border-radius: 22px;
  overflow: hidden;
  box-shadow: 0 10px 25px rgba(0,0,0,.08);
  background: #f4f6f8;
  transition: transform .2s ease, box-shadow .2s ease;
}
.bt-hk-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 16px 35px rgba(0,0,0,.12);
}
.bt-hk-card img {
  display: block;
  width: 100%;
  height: auto;
}
@media (max-width: 900px){
  .bt-hk-cards {
    grid-template-columns: 1fr;
  }
}