.comparative-hero {
  background: #eef5f3;
}

.comparative-grid,
.species-grid,
.system-compare-grid,
.evidence-ladder,
.case-grid {
  display: grid;
  gap: 1rem;
}

.comparative-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.species-grid { grid-template-columns: repeat(5, minmax(0, 1fr)); }
.system-compare-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.evidence-ladder { grid-template-columns: repeat(6, minmax(0, 1fr)); }
.case-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }

.comparative-choice {
  min-width: 0;
  padding: 1rem;
  color: var(--color-ink);
  text-align: left;
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  cursor: pointer;
}

.comparative-choice:hover,
.comparative-choice:focus-visible,
.comparative-choice[aria-pressed="true"] {
  border-color: var(--color-primary);
  background: #f0f7f5;
  box-shadow: var(--shadow-soft);
}

.comparative-choice.is-visited::after {
  display: inline-block;
  margin-top: 0.65rem;
  color: var(--color-primary);
  font-size: 0.78rem;
  font-weight: 700;
  content: "已查看";
}

.comparative-choice strong,
.comparative-choice small { display: block; }
.comparative-choice small { margin-top: 0.25rem; color: var(--color-ink-soft); }

.comparative-panel {
  margin-top: 1rem;
  padding: clamp(1rem, 3vw, 1.5rem);
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-left: 5px solid var(--color-primary);
  border-radius: var(--radius-lg);
}

.comparative-panel h3 { margin-top: 0; }
.comparative-panel__columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.special-index {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.65rem;
  margin-top: 1rem;
}

.special-index article {
  padding: 0.8rem;
  background: #f6f8f7;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
}

.special-index h4,
.special-index p { margin: 0; }
.special-index p { margin-top: 0.3rem; color: var(--color-ink-soft); font-size: 0.86rem; }

.evidence-step {
  position: relative;
  min-width: 0;
  padding: 1rem;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background: var(--color-surface);
}

.evidence-step::before {
  display: grid;
  width: 2rem;
  height: 2rem;
  place-items: center;
  margin-bottom: 0.6rem;
  color: #fff;
  background: var(--color-primary);
  border-radius: 50%;
  content: attr(data-order);
  font-weight: 700;
}

.evidence-step.is-viewed { border-color: var(--color-primary); background: #f0f7f5; }
.evidence-step button { margin-top: 0.7rem; }

.case-card {
  padding: 1.1rem;
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
}

.case-card details { margin-top: 0.8rem; }
.case-card.is-visited { border-color: var(--color-primary); }

.comparative-quiz fieldset {
  margin: 0 0 1rem;
  padding: 1rem;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
}

.comparative-quiz label { display: flex; gap: 0.6rem; margin: 0.55rem 0; }
.comparative-feedback { margin-top: 0.75rem; padding: 0.8rem; background: #f4f7f6; border-left: 4px solid var(--color-primary); }

@media (max-width: 1100px) {
  .species-grid,
  .evidence-ladder { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .comparative-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 760px) {
  .system-compare-grid,
  .case-grid,
  .comparative-panel__columns,
  .special-index { grid-template-columns: 1fr; }
  .species-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 480px) {
  .comparative-grid,
  .species-grid,
  .evidence-ladder { grid-template-columns: 1fr; }
}