.page-faq {
  --faq-sidebar-w: 264px;
  --faq-gap: 48px;
  background:
    linear-gradient(90deg, rgba(30, 90, 168, 0.035) 1px, transparent 1px),
    linear-gradient(0deg, rgba(30, 90, 168, 0.035) 1px, transparent 1px),
    var(--color-surface);
  background-size: 32px 32px;
}

/* ===== 首屏 Hero ===== */
.page-faq .faq-hero {
  position: relative;
  min-height: 320px;
  display: flex;
  align-items: flex-end;
  overflow: hidden;
  background: var(--color-primary-dark);
}

.page-faq .faq-hero__media {
  position: absolute;
  inset: 0;
}

.page-faq .faq-hero__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.page-faq .faq-hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(100deg, rgba(15, 58, 107, 0.94) 0%, rgba(15, 58, 107, 0.78) 45%, rgba(15, 58, 107, 0.38) 100%);
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: var(--space-xl) var(--space-md) var(--space-lg);
}

.page-faq .faq-hero .breadcrumb {
  margin: 0 0 var(--space-md);
  padding: 0;
  background: transparent;
  color: rgba(255, 255, 255, 0.75);
  font-size: 0.9rem;
}

.page-faq .faq-hero .breadcrumb a {
  color: rgba(255, 255, 255, 0.75);
  text-decoration: none;
  transition: color var(--transition);
}

.page-faq .faq-hero .breadcrumb a:hover {
  color: var(--color-accent);
}

.page-faq .faq-hero .breadcrumb__separator {
  margin: 0 var(--space-xs);
  opacity: 0.5;
}

.page-faq .faq-hero h1 {
  color: var(--color-white);
  font-size: clamp(1.7rem, 4vw, 2.9rem);
  line-height: 1.16;
  max-width: 880px;
  margin: 0 0 var(--space-sm);
  letter-spacing: -0.01em;
}

.page-faq .faq-hero p {
  color: rgba(255, 255, 255, 0.86);
  font-size: 1rem;
  line-height: 1.7;
  max-width: 680px;
  margin: 0;
}

/* ===== 主体布局 ===== */
.page-faq .faq-layout {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: var(--space-lg) var(--space-md) var(--space-xl);
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

/* ===== 左侧分类目录 ===== */
.page-faq .faq-sidebar {
  flex-shrink: 0;
}

.page-faq .faq-sidebar__inner {
  position: sticky;
  top: var(--space-md);
}

.page-faq .faq-sidebar__title {
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-gray);
  margin: 0 0 var(--space-sm);
  padding-left: 4px;
}

.page-faq .faq-nav {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
}

.page-faq .faq-nav__link {
  display: inline-flex;
  align-items: center;
  padding: 10px 18px;
  border-radius: 999px;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  color: var(--color-primary-dark);
  font-size: 0.92rem;
  font-weight: 600;
  text-decoration: none;
  box-shadow: var(--shadow-card);
  transition: background var(--transition), color var(--transition), border-color var(--transition), transform var(--transition);
}

.page-faq .faq-nav__link:hover,
.page-faq .faq-nav__link.is-active {
  background: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
  transform: translateX(2px);
}

.page-faq .faq-sidebar__note {
  margin-top: var(--space-lg);
  padding: var(--space-md);
  background: var(--color-secondary);
  border-radius: var(--radius);
  border-left: 3px solid var(--color-accent);
  max-width: 260px;
}

.page-faq .faq-sidebar__note p {
  margin: 0 0 var(--space-sm);
  color: var(--color-graphite);
  font-size: 0.95rem;
  font-weight: 600;
}

/* ===== 内容区 ===== */
.page-faq .faq-content {
  flex: 1;
  min-width: 0;
}

.page-faq .faq-section {
  margin-bottom: var(--space-xl);
  scroll-margin-top: var(--space-md);
}

.page-faq .faq-section:last-child {
  margin-bottom: 0;
}

.page-faq .faq-section .section-title {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: clamp(1.4rem, 2.6vw, 1.9rem);
  margin-bottom: var(--space-sm);
}

.page-faq .faq-section__icon {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
  color: var(--color-primary);
}

.page-faq .faq-section__desc {
  color: var(--color-gray);
  font-size: 0.98rem;
  margin: 0 0 var(--space-md);
  max-width: 620px;
  line-height: 1.7;
}

/* ===== 手风琴 ===== */
.page-faq .faq-item {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  margin-bottom: var(--space-sm);
  transition: box-shadow var(--transition), border-color var(--transition);
}

.page-faq .faq-item[open] {
  border-color: rgba(30, 90, 168, 0.28);
  box-shadow: var(--shadow-card);
}

.page-faq .faq-item summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md);
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-graphite);
  user-select: none;
}

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

.page-faq .faq-item summary::after {
  content: "+";
  margin-left: auto;
  font-size: 1.4rem;
  font-weight: 400;
  line-height: 1;
  color: var(--color-primary);
  transition: transform var(--transition);
}

.page-faq .faq-item[open] summary::after {
  content: "–";
}

.page-faq .faq-item__number {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--color-accent);
  color: var(--color-white);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.86rem;
  font-weight: 700;
  box-shadow: 0 2px 6px rgba(245, 166, 35, 0.3);
}

.page-faq .faq-item__title {
  flex: 1;
  min-width: 0;
}

.page-faq .faq-item__answer {
  padding: 0 var(--space-md) var(--space-md) calc(var(--space-md) + 48px);
  color: var(--color-gray);
  font-size: 0.95rem;
  line-height: 1.75;
}

.page-faq .faq-item__answer p {
  margin: 0 0 var(--space-sm);
}

.page-faq .faq-item__answer p:last-child {
  margin-bottom: 0;
}

.page-faq .faq-item__answer .faq-inline-link {
  margin-top: var(--space-sm);
}

.page-faq .faq-inline-link {
  display: inline-flex;
  color: var(--color-link);
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px dashed rgba(58, 141, 222, 0.5);
  transition: color var(--transition), border-bottom-color var(--transition);
}

.page-faq .faq-inline-link:hover {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

/* ===== 联系支持区 ===== */
.page-faq .faq-support {
  max-width: var(--container-max);
  margin: 0 auto var(--space-xl);
  padding: var(--space-lg) var(--space-md);
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
  background:
    linear-gradient(135deg, rgba(30, 90, 168, 0.04) 0%, rgba(227, 237, 249, 0.5) 100%),
    var(--color-white);
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-card);
}

.page-faq .faq-support__media {
  flex-shrink: 0;
}

.page-faq .faq-support__media img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  border-radius: var(--radius);
  box-shadow: var(--shadow-float);
}

.page-faq .faq-support__content {
  flex: 1;
  min-width: 0;
}

.page-faq .faq-support__content .section-title {
  margin-top: 0;
  font-size: clamp(1.35rem, 2.4vw, 1.8rem);
}

.page-faq .faq-support__content p {
  color: var(--color-gray);
  line-height: 1.75;
  margin: var(--space-sm) 0 var(--space-md);
}

.page-faq .faq-support__list {
  list-style: none;
  padding: 0;
  margin: 0 0 var(--space-md);
  display: grid;
  gap: var(--space-xs);
}

.page-faq .faq-support__list li {
  position: relative;
  padding-left: 22px;
  color: var(--color-graphite);
  font-size: 0.96rem;
  line-height: 1.6;
}

.page-faq .faq-support__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 9px;
  height: 9px;
  border-radius: 2px;
  background: var(--color-accent);
  transform: rotate(45deg);
}

.page-faq .faq-support__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.page-faq .faq-support__actions .btn {
  text-decoration: none;
}

/* ===== 平板与桌面 ===== */
@media (min-width: 640px) {
  .page-faq .faq-nav {
    flex-direction: row;
  }

  .page-faq .faq-support {
    flex-direction: row;
    align-items: center;
  }

  .page-faq .faq-support__media {
    flex: 0 0 280px;
  }

  .page-faq .faq-support__list {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 940px) {
  .page-faq .faq-hero {
    min-height: 380px;
  }

  .page-faq .faq-layout {
    flex-direction: row;
    align-items: flex-start;
    gap: var(--faq-gap);
  }

  .page-faq .faq-sidebar {
    width: var(--faq-sidebar-w);
  }

  .page-faq .faq-nav {
    flex-direction: column;
    gap: var(--space-xs);
  }

  .page-faq .faq-nav__link {
    width: 100%;
  }

  .page-faq .faq-support__media {
    flex-basis: 340px;
  }
}

@media (min-width: 1200px) {
  .page-faq .faq-layout {
    gap: 72px;
  }
}