.faq {
  padding: var(--space-24) 0;
  border-top: 1px solid var(--color-border);
}

.faq__head {
  text-align: center;
  max-width: 520px;
  margin: 0 auto var(--space-12);
}

.faq__title {
  font-size: clamp(26px, 3vw, 36px);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.1;
  color: var(--color-text-primary);
  margin-bottom: var(--space-4);
}

.faq__sub {
  font-size: var(--text-base);
  line-height: 1.7;
  color: var(--color-text-secondary);
}

.faq__list {
  max-width: 720px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.faq__item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-bg);
  overflow: hidden;
  transition: box-shadow 0.15s ease;
}

.faq__item[open] { box-shadow: var(--shadow-md); }
.faq__item[open] .faq__question { color: var(--color-accent); }

.faq__question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  list-style: none;
  padding: var(--space-5) var(--space-6);
  font-size: var(--text-md);
  font-weight: 600;
  color: var(--color-text-primary);
  cursor: pointer;
  user-select: none;
  transition: color 0.15s ease;
}

.faq__question::-webkit-details-marker { display: none; }
.faq__question::marker { display: none; }

.faq__question::after {
  content: '';
  display: block;
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%236b7280' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-size: contain;
  transition: transform 0.2s ease;
}

.faq__item[open] .faq__question::after { transform: rotate(180deg); }

.faq__answer {
  padding: var(--space-5) var(--space-6);
  font-size: var(--text-base);
  line-height: 1.75;
  color: var(--color-text-secondary);
  border-top: 1px solid var(--color-border);
}

.faq__answer a {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.faq__answer a:hover { color: var(--color-accent-hover); }

@media (max-width: 600px) {
  .faq { padding: var(--space-16) 0; }
  .faq__question {
    font-size: var(--text-base);
    padding: var(--space-4) var(--space-5);
  }
  .faq__answer { padding: var(--space-4) var(--space-5); }
}