main p > img[src^="qtt_"] {
  display: block;
  max-width: 100%;
  margin: 1.25rem auto;
  border-radius: 4px;
}

.coal main p > img[src^="qtt_"],
.navy main p > img[src^="qtt_"],
.ayu main p > img[src^="qtt_"] {
  filter: invert(1) hue-rotate(180deg);
}