.topic-directory-section {
  padding-top: 42px;
}

.topic-directory-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 34px 24px;
}

.topic-directory-card {
  min-width: 0;
  min-height: 0;
  display: block;
  position: relative;
  padding: 0 0 24px;
  border-radius: 8px;
  background: transparent;
  color: #354052;
  box-shadow: none;
  transition: transform 0.22s;
}

.topic-directory-card:hover {
  transform: translateY(-4px);
  box-shadow: none;
}

.topic-directory-cover {
  width: 100%;
  aspect-ratio: 4 / 3;
  display: block;
  overflow: hidden;
  border: 1px solid #e8edf5;
  border-radius: 8px;
  background: #edf2fa;
}

.topic-directory-cover img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
  transition: transform 0.38s;
}

.topic-directory-card:hover .topic-directory-cover img {
  transform: scale(1.045);
}

.topic-directory-card .topic-directory-info {
  width: calc(100% - 34px);
  height: 46px;
  min-height: 42px;
  position: absolute;
  left: 17px;
  right: 17px;
  bottom: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 16px;
  border: 1px solid #edf0f5;
  border-radius: 6px;
  background: #fff;
  box-shadow: 0 12px 24px rgba(38, 58, 91, 0.08);
}

.topic-directory-card .topic-directory-info strong {
  min-width: 0;
  overflow: hidden;
  color: #364153;
  font-size: 17px;
  white-space: nowrap;
  text-overflow: ellipsis;
  text-align: center;
}

.topic-directory-card .topic-directory-info small {
  flex: 0 0 auto;
  height: auto;
  margin: 0;
  color: #969eaa;
  font-size: 12px;
  line-height: 1;
}

.topic-software-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.topic-software-grid .home-software-card {
  min-height: 260px;
}

.topic-software-grid .empty {
  grid-column: 1 / -1;
}

.topic-current-cover {
  width: min(360px, 100%);
  aspect-ratio: 4 / 3;
  display: block;
  object-fit: cover;
  border: 1px solid #dfe5ee;
  border-radius: 8px;
}

.topic-admin-cover {
  width: 92px;
  height: 62px;
  display: block;
  object-fit: cover;
  border: 1px solid #dfe5ee;
  border-radius: 7px;
}

@media (max-width: 1040px) {
  .topic-directory-grid,
  .topic-software-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 760px) {
  .topic-directory-grid,
  .topic-software-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .topic-directory-grid {
    gap: 26px 14px;
  }

  .topic-directory-card .topic-directory-info {
    width: calc(100% - 20px);
    height: 42px;
    min-height: 40px;
    left: 10px;
    right: 10px;
    padding: 9px 12px;
  }

  .topic-directory-card .topic-directory-info strong {
    font-size: 16px;
  }
}

@media (max-width: 480px) {
  .topic-directory-grid,
  .topic-software-grid {
    grid-template-columns: 1fr;
  }

  .topic-directory-cover {
    aspect-ratio: 16 / 10;
  }
}