body {
  line-height: 1.7;
}

.faq-container {
  width: 100%;
  max-width: 920px;
  margin: 0 auto;
  padding: 0 20px;
}

.faq-hero {
  background: linear-gradient(135deg, var(--primary-green), var(--primary-green-dark));
  color: var(--white);
  padding: 84px 0 72px;
  text-align: center;
}

.faq-hero h1 {
  font-size: clamp(2.35rem, 5vw, 4rem);
  line-height: 1.08;
  margin-bottom: 18px;
  font-weight: 700;
  letter-spacing: -0.04em;
}

.faq-hero p {
  font-size: 1.15rem;
  max-width: 780px;
  margin: 0 auto;
  color: rgba(255, 255, 255, 0.9);
  font-weight: 300;
}

.faq-content {
  padding: 64px 0 78px;
  background: var(--white);
}

.summary-card {
  box-shadow: 0 12px 30px rgba(15, 23, 42, 0.04);
}

.category-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  margin-bottom: 46px;
}

.category-nav button {
  background: var(--light-bg);
  border: 1px solid var(--border);
  color: var(--dark-text);
  text-decoration: none;
  font-family: inherit;
  cursor: pointer;
  border-radius: 999px;
  padding: 10px 16px;
  font-weight: 700;
  font-size: 0.92rem;
  transition: background-color 0.2s, color 0.2s, transform 0.2s;
}

.category-nav button:hover {
  background: var(--primary-green);
  color: var(--white);
  transform: translateY(-1px);
}

.faq-section {
  padding: 34px 0;
  border-top: 1px solid var(--border);
}

.faq-section h2 {
  color: var(--dark-text);
  font-size: 1.8rem;
  line-height: 1.25;
  margin-bottom: 20px;
}

.faq-list {
  display: grid;
  gap: 14px;
}

details {
  background: var(--light-bg);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 0;
  overflow: hidden;
  transition: border-color 0.2s, box-shadow 0.2s;
}

details[open] {
  background: var(--white);
  border-color: rgba(0, 150, 106, 0.35);
  box-shadow: 0 10px 24px rgba(15, 23, 42, 0.05);
}

summary {
  cursor: pointer;
  list-style: none;
  padding: 20px 22px;
  font-weight: 700;
  color: var(--dark-text);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

summary::-webkit-details-marker {
  display: none;
}

summary::after {
  content: '+';
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--primary-green-soft);
  color: var(--primary-green);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 1.2rem;
  font-weight: 700;
}

details[open] summary::after {
  content: '−';
}

.answer {
  padding: 0 22px 22px;
  color: #334155;
  font-size: 1rem;
}

.answer p {
  margin-bottom: 14px;
}

.answer p:last-child {
  margin-bottom: 0;
}

.answer ul {
  padding-left: 22px;
  margin: 10px 0 14px;
}

.answer li {
  margin-bottom: 8px;
}

.answer a {
  color: var(--primary-green);
  font-weight: 700;
  text-decoration: none;
}

.answer a:hover {
  text-decoration: underline;
}

.notice-box {
  margin: 18px 0 0;
}

.btn {
  background-color: var(--primary-green);
  color: var(--white) !important;
  padding: 14px 24px;
  font-size: 1rem;
  transition: transform 0.2s, box-shadow 0.2s;
}

.btn:hover {
  box-shadow: 0 8px 18px rgba(0, 150, 106, 0.18);
  text-decoration: none !important;
}

@media (max-width: 700px) {
  .faq-container {
    padding-left: 16px;
    padding-right: 16px;
  }

  .faq-hero {
    padding: 64px 0 56px;
  }

  .summary-card,
  .contact-card {
    padding: 22px;
    border-radius: 18px;
  }

  .faq-section h2 {
    font-size: 1.45rem;
  }

  summary {
    padding: 18px;
  }

  .answer {
    padding: 0 18px 20px;
  }
}