/* =======================================================
   faq.css — 常见问题页专属样式
   依赖：global.css（Design Tokens / 导航 / 页脚 / 通用工具）
   ======================================================= */

/* ===========================
   Page Hero（复用 news.css 同款）
   =========================== */
.page-hero {
  background: var(--brand-dark);
  height: 300px;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  margin-top: var(--nav-h);
}

.page-hero-glow {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 30% 50%, rgba(10,158,206,.22) 0%, transparent 55%),
    radial-gradient(circle at 72% 50%, rgba(4,82,151,.28) 0%, transparent 55%);
  z-index: 0;
}

.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.03) 1px, transparent 1px);
  background-size: 40px 40px;
  z-index: 0;
}

.page-hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  color: white;
  padding: 0 2rem;
}

.page-hero-content .breadcrumb {
  font-size: 0.82rem;
  color: rgba(255,255,255,.55);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  justify-content: center;
}

.page-hero-content .breadcrumb a {
  color: rgba(255,255,255,.55);
  transition: color var(--transition);
}
.page-hero-content .breadcrumb a:hover { color: rgba(255,255,255,.9); }

.page-hero-content h1 {
  font-family: var(--font-serif);
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  margin-bottom: 0.75rem;
  line-height: 1.2;
}

.page-hero-content .hero-sub {
  font-size: 1rem;
  opacity: 0.75;
}

/* ===========================
   FAQ 主体区
   =========================== */
.faq-section {
  padding: 80px 0 100px;
  background: #fff;
}

.faq-inner {
  max-width: 860px;
  margin: 0 auto;
  padding: 0 24px;
}

/* 搜索栏 */
.faq-search-wrap {
  position: relative;
  margin-bottom: 56px;
}

.faq-search-icon {
  position: absolute;
  left: 18px;
  top: 50%;
  transform: translateY(-50%);
  width: 20px;
  height: 20px;
  color: var(--neutral-500);
  pointer-events: none;
}

.faq-search {
  width: 100%;
  padding: 16px 20px 16px 52px;
  font-size: 1rem;
  font-family: var(--font-sans);
  border: 2px solid var(--neutral-300);
  border-radius: 50px;
  background: var(--neutral-100);
  color: var(--neutral-900);
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.faq-search:focus {
  border-color: var(--brand-primary);
  box-shadow: 0 0 0 4px rgba(4,82,151,.1);
  background: #fff;
}

.faq-search::placeholder { color: var(--neutral-500); }

/* ===========================
   分类 Tab 栏
   =========================== */
.faq-tabs {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}

.faq-tab {
  padding: 8px 22px;
  border-radius: 50px;
  font-size: 0.9rem;
  font-family: var(--font-sans);
  font-weight: 500;
  border: 1.5px solid var(--neutral-300);
  background: #fff;
  color: var(--neutral-500);
  cursor: pointer;
  transition: all var(--transition);
}

.faq-tab:hover {
  border-color: var(--brand-primary);
  color: var(--brand-primary);
}

.faq-tab.active {
  background: var(--brand-primary);
  border-color: var(--brand-primary);
  color: #fff;
  box-shadow: var(--shadow-sm);
}

/* ===========================
   FAQ 分组
   =========================== */
.faq-group {
  display: none;
}

.faq-group.active {
  display: block;
  animation: fadeInUp 0.3s ease both;
}

.faq-group-title {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--brand-dark);
  margin-bottom: 20px;
  padding-bottom: 14px;
  border-bottom: 2px solid var(--brand-light);
}

.faq-group-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  background: var(--brand-light);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.faq-group-icon svg {
  width: 18px;
  height: 18px;
  color: var(--brand-primary);
}

/* ===========================
   手风琴 Item
   =========================== */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin-bottom: 56px;
}

.faq-item {
  border: 1px solid var(--neutral-300);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  overflow: hidden;
  transition: box-shadow var(--transition), border-color var(--transition);
  background: #fff;
}

.faq-item:hover {
  border-color: var(--brand-primary);
  box-shadow: var(--shadow-md);
}

.faq-item.open {
  border-color: var(--brand-primary);
  box-shadow: 0 4px 20px rgba(4,82,151,.12);
}

.faq-q {
  width: 100%;
  text-align: left;
  padding: 20px 24px;
  font-size: 0.97rem;
  font-weight: 600;
  color: var(--neutral-900);
  background: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 14px;
  font-family: var(--font-sans);
  transition: color var(--transition), background var(--transition);
  line-height: 1.5;
}

.faq-q:hover { color: var(--brand-primary); }
.faq-item.open .faq-q {
  color: var(--brand-primary);
  background: rgba(4,82,151,.03);
}

.faq-q-num {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border-radius: var(--radius-sm);
  background: var(--brand-light);
  color: var(--brand-primary);
  font-size: 0.78rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition), color var(--transition);
}

.faq-item.open .faq-q-num {
  background: var(--brand-primary);
  color: #fff;
}

.faq-q-text { flex: 1; }

.faq-q-arrow {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  color: var(--neutral-500);
  transition: transform var(--transition), color var(--transition);
}

.faq-item.open .faq-q-arrow {
  transform: rotate(180deg);
  color: var(--brand-primary);
}

/* 答案折叠区 */
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s cubic-bezier(0.16, 1, 0.3, 1),
              padding 0.3s ease,
              opacity 0.3s ease;
  opacity: 0;
}

.faq-item.open .faq-a {
  max-height: 600px;
  opacity: 1;
}

.faq-a-inner {
  padding: 22px 24px 22px 66px;
  font-size: 0.93rem;
  color: var(--neutral-500);
  line-height: 1.85;
}

.faq-a-inner p { margin-bottom: 10px; }
.faq-a-inner p:last-child { margin-bottom: 0; }

.faq-a-inner ul {
  list-style: none;
  padding: 0;
  margin: 8px 0 10px;
}

.faq-a-inner ul li {
  padding: 5px 0 5px 20px;
  position: relative;
  color: var(--neutral-500);
}

.faq-a-inner ul li::before {
  content: '';
  position: absolute;
  left: 4px;
  top: 50%;
  transform: translateY(-50%);
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--brand-accent);
}

.faq-a-inner strong {
  color: var(--brand-dark);
  font-weight: 600;
}

/* ===========================
   没搜到时的空状态
   =========================== */
.faq-empty {
  display: none;
  text-align: center;
  padding: 64px 0;
  color: var(--neutral-500);
}

.faq-empty svg {
  width: 64px;
  height: 64px;
  margin: 0 auto 20px;
  color: var(--neutral-300);
}

.faq-empty h3 {
  font-size: 1.1rem;
  margin-bottom: 8px;
  color: var(--neutral-700);
}

/* ===========================
   底部 CTA
   =========================== */
.faq-cta {
  background: linear-gradient(135deg, var(--brand-dark) 0%, #0a2a50 100%);
  border-radius: var(--radius-lg);
  padding: 56px 40px;
  text-align: center;
  position: relative;
  overflow: hidden;
  margin-top: 64px;
}

.faq-cta::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.03) 1px, transparent 1px);
  background-size: 32px 32px;
}

.faq-cta-glow {
  position: absolute;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(10,158,206,.18) 0%, transparent 70%);
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  pointer-events: none;
}

.faq-cta-content {
  position: relative;
  z-index: 1;
}

.faq-cta h3 {
  font-family: var(--font-serif);
  font-size: clamp(1.3rem, 2.5vw, 1.8rem);
  color: #fff;
  margin-bottom: 12px;
}

.faq-cta p {
  font-size: 1rem;
  color: rgba(255,255,255,.7);
  margin-bottom: 32px;
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

.faq-cta-btns {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn-cta-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  background: var(--brand-accent);
  color: #fff;
  border-radius: var(--radius-full);
  font-size: 0.95rem;
  font-weight: 600;
  font-family: var(--font-sans);
  text-decoration: none;
  transition: all var(--transition);
  border: none;
  cursor: pointer;
}

.btn-cta-primary:hover {
  background: #0b8fb5;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(10,158,206,.4);
}

.btn-cta-ghost {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  background: transparent;
  color: #fff;
  border: 1.5px solid rgba(255,255,255,.4);
  border-radius: var(--radius-full);
  font-size: 0.95rem;
  font-weight: 500;
  font-family: var(--font-sans);
  text-decoration: none;
  transition: all var(--transition);
  cursor: pointer;
}

.btn-cta-ghost:hover {
  border-color: rgba(255,255,255,.8);
  background: rgba(255,255,255,.08);
  transform: translateY(-2px);
}

/* ===========================
   Reveal 动画
   =========================== */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.visible {
  opacity: 1;
  transform: none;
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: none; }
}

/* ===========================
   搜索高亮
   =========================== */
mark.faq-highlight {
  background: rgba(10,158,206,.15);
  color: var(--brand-primary);
  border-radius: 2px;
  padding: 0 2px;
  font-style: normal;
}

/* ===========================
   搜索状态 — 计数
   =========================== */
.faq-search-hint {
  font-size: 0.82rem;
  color: var(--neutral-500);
  margin-top: 10px;
  padding-left: 18px;
  height: 18px;
}

/* ===========================
   Responsive
   =========================== */
@media (max-width: 768px) {
  .faq-section { padding: 56px 0 72px; }
  .faq-q { padding: 16px 18px; font-size: 0.93rem; }
  .faq-a-inner { padding: 0 18px 18px 50px; }
  .faq-cta { padding: 40px 24px; }
  .page-hero { height: 240px; }
}