.book-support {
  max-width: 720px;
  margin: 58px auto 12px;
  text-align: center;
}

.book-support h2 {
  margin: 0 0 10px;
  font-size: clamp(1.8rem, 4vw, 2.5rem);
}

.book-support p {
  max-width: 560px;
  margin: 0 auto 24px;
  color: var(--muted);
  line-height: 1.65;
}

.book-support .support-bookmark {
  box-sizing: border-box;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 58px;
  width: min(100%, 390px);
  padding: 14px 48px 14px 28px;
  border: 0;
  border-radius: 0;
  background: rgba(108, 206, 208, .92);
  color: #173b40;
  font-weight: 750;
  text-decoration: none;
  clip-path: polygon(0 0, 92% 0, 100% 50%, 92% 100%, 0 100%);
  box-shadow: 0 7px 14px rgba(40, 70, 77, .08);
  transition: transform .2s ease, filter .2s ease;
}

.book-support .support-bookmark:hover,
.book-support .support-bookmark:focus-visible {
  transform: translateX(7px);
  filter: brightness(1.04);
}

@media (max-width: 600px) {
  .book-support {
    margin-top: 46px;
  }

  .book-support .support-bookmark {
    width: 92%;
  }
}