/* FAQ 页样式 — 与官网整体视觉一致（暖纸色 + 鼠尾草绿） */
:root {
  --bg-app: #F2EFE9;
  --bg-surface: #FCFBFA;
  --bg-panel: #F4F7F5;
  --bg-tint: #E8EFEA;
  --primary: #6B8E7B;
  --primary-strong: #567462;
  --foreground: #3F4F46;
  --subtle: #6B7A72;
  --line: rgba(107, 142, 123, 0.25);
  --radius-lg: 18px;
  --radius-md: 12px;
  --shadow-md: 0 6px 24px rgba(74, 93, 83, 0.08);
  --font-serif: "Noto Serif SC", "Songti SC", "SimSun", serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--bg-app);
  color: var(--foreground);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
}

/* === 顶栏 === */
.topbar {
  background: rgba(242, 239, 233, 0.85);
  backdrop-filter: blur(8px);
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid var(--line);
}

.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.brand {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--foreground);
  text-decoration: none;
  letter-spacing: 0.06em;
}

.topbar-links {
  display: flex;
  align-items: center;
  gap: 26px;
  font-size: 0.92rem;
}

.topbar-links a {
  color: var(--subtle);
  text-decoration: none;
  transition: color 0.2s;
}

.topbar-links a:hover,
.topbar-links a[aria-current="page"] {
  color: var(--primary-strong);
  font-weight: 600;
}

.topbar-links .cta-link {
  color: var(--primary-strong);
  font-weight: 600;
}

/* === 页头 === */
.faq-hero {
  padding: 72px 0 40px;
  text-align: center;
}

.eyebrow {
  display: inline-block;
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  color: var(--primary-strong);
  background: var(--bg-tint);
  padding: 6px 16px;
  border-radius: 999px;
  margin-bottom: 20px;
}

.faq-hero h1 {
  font-family: var(--font-serif);
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--foreground);
  margin-bottom: 14px;
}

.faq-hero .lead {
  color: var(--subtle);
  max-width: 560px;
  margin: 0 auto;
}

/* === FAQ 列表 === */
.faq-list {
  padding-bottom: 24px;
}

.faq-item {
  background: var(--bg-surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  margin-bottom: 14px;
  overflow: hidden;
  transition: border-color 0.2s;
}

.faq-item:hover {
  border-color: rgba(107, 142, 123, 0.45);
}

.faq-item summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 26px;
  font-weight: 600;
  font-size: 1.02rem;
  color: var(--foreground);
  user-select: none;
}

.faq-item summary::-webkit-details-marker { display: none; }

/* 收起/展开指示器 */
.faq-item summary::after {
  content: "+";
  flex-shrink: 0;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-tint);
  color: var(--primary-strong);
  font-size: 1.1rem;
  font-weight: 400;
  transition: transform 0.25s ease;
}

.faq-item[open] summary::after {
  transform: rotate(45deg);
}

.faq-answer {
  padding: 4px 26px 24px;
  color: var(--subtle);
  font-size: 0.96rem;
  border-top: 1px dashed rgba(107, 142, 123, 0.18);
  padding-top: 16px;
}

.faq-answer p { margin-bottom: 12px; }
.faq-answer p:last-child { margin-bottom: 0; }

.faq-answer ul,
.faq-answer ol {
  margin: 0 0 12px 22px;
}

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

.faq-answer strong {
  color: var(--foreground);
  font-weight: 600;
}

.faq-answer a {
  color: var(--primary-strong);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* === 底部 CTA === */
.faq-cta {
  text-align: center;
  background: linear-gradient(180deg, var(--bg-panel) 0%, var(--bg-app) 100%);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 52px 32px;
  margin: 32px 0 64px;
}

.faq-cta h2 {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  margin-bottom: 12px;
}

.faq-cta p {
  color: var(--subtle);
  max-width: 520px;
  margin: 0 auto 24px;
}

.btn-primary {
  display: inline-block;
  background: var(--primary);
  color: #fff;
  text-decoration: none;
  font-weight: 600;
  padding: 14px 34px;
  border-radius: 999px;
  transition: background 0.2s, transform 0.2s;
}

.btn-primary:hover {
  background: var(--primary-strong);
  transform: translateY(-1px);
}

/* === 页脚 === */
.footer {
  border-top: 1px solid var(--line);
  background: var(--bg-surface);
}

.footer-inner {
  padding: 36px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 14px;
}

.footer-brand {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 1.1rem;
}

.footer-links {
  display: flex;
  gap: 20px;
  font-size: 0.88rem;
}

.footer-links a {
  color: var(--subtle);
  text-decoration: none;
}

.footer-links a:hover { color: var(--primary-strong); }

.footer-copy {
  font-size: 0.8rem;
  color: var(--subtle);
}

.footer-beian a {
  color: var(--subtle);
  text-decoration: none;
  margin-left: 6px;
}

/* === 响应式 === */
@media (max-width: 720px) {
  .topbar-links { gap: 16px; }
  .topbar-links a:nth-child(2),
  .topbar-links a:nth-child(3) { display: none; }
  .faq-hero { padding: 48px 0 28px; }
  .faq-hero h1 { font-size: 1.7rem; }
  .faq-item summary { padding: 17px 18px; font-size: 0.95rem; }
  .faq-answer { padding-left: 18px; padding-right: 18px; }
}