.math-case-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.math-case-item {
  min-width: 0;
  padding: 22px;
  border: 1px solid var(--math-line);
  border-left: 4px solid var(--math-gold);
  background: #fbf8f1;
}

.math-case-item strong {
  display: block;
  margin-bottom: 10px;
  color: var(--math-gold-deep);
  font-size: 12px;
}

.math-case-item p {
  margin: 0;
  color: #344059;
  font-size: 15px;
  line-height: 1.85;
}

@media (max-width: 560px) {
  .math-case-item { padding: 18px; }
}