.page-faq {
  --faq-gap: clamp(52px, 8vw, 124px);
  --faq-rule: 1px solid var(--fh-iron);
  display: block;
  background:
    linear-gradient(180deg, rgba(14, 107, 112, 0.12) 0%, rgba(10, 11, 13, 0) 26%),
    linear-gradient(0deg, rgba(194, 21, 27, 0.10) 0%, rgba(10, 11, 13, 0) 22%);
}

.page-faq .fh-section {
  padding-block: var(--faq-gap);
}

.page-faq .faq-crumbs {
  padding-top: clamp(18px, 3.5vw, 38px);
}

.page-faq .fh-breadcrumb__sep {
  color: var(--fh-iron);
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  padding-top: clamp(24px, 5vw, 60px);
  padding-bottom: clamp(36px, 6vw, 76px);
}

.page-faq .faq-hero__inner {
  max-width: 1120px;
}

.page-faq .faq-hero__title {
  margin: 18px 0 0;
  line-height: 1.04;
  color: var(--fh-bone);
}

.page-faq .faq-hero__lead {
  margin: 30px 0 0;
  max-width: 44em;
  color: var(--fh-mist);
  font-size: clamp(0.96rem, 1.4vw, 1.08rem);
}

.page-faq .faq-hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(22px, 4vw, 60px);
  margin: 42px 0 0;
  padding: 24px 0 0;
  border-top: var(--faq-rule);
  list-style: none;
}

.page-faq .faq-hero__stats li {
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.page-faq .faq-hero__stats .fh-data {
  color: var(--fh-flame);
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 700;
  line-height: 1;
}

.page-faq .faq-hero__stats li span:last-child {
  font-size: 0.84rem;
  letter-spacing: 0.06em;
  color: var(--fh-mist);
}

/* ---------- 通用区块头 ---------- */

.page-faq .faq-sec__head,
.page-faq .faq-topic__head {
  margin-bottom: clamp(22px, 3.6vw, 42px);
}

.page-faq .faq-sec__title,
.page-faq .faq-topic__title {
  margin: 12px 0 0;
  font-size: clamp(1.5rem, 3.4vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -0.015em;
  line-height: 1.28;
  color: var(--fh-bone);
}

/* ---------- 主题索引 ---------- */

.page-faq .faq-index__grid {
  gap: clamp(28px, 5vw, 68px);
  align-items: start;
}

.page-faq .faq-topics {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: var(--faq-rule);
}

.page-faq .faq-topics__item {
  border-bottom: var(--faq-rule);
}

.page-faq .faq-topics__link {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: baseline;
  gap: 14px;
  padding: 18px 4px;
  text-decoration: none;
  color: var(--fh-bone);
  transition: padding-left 0.25s var(--fh-ease), background-color 0.25s var(--fh-ease);
}

.page-faq .faq-topics__link:hover,
.page-faq .faq-topics__link:focus-visible {
  padding-left: 12px;
  background: rgba(47, 224, 214, 0.05);
}

.page-faq .faq-topics__num {
  font-family: var(--fh-font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  color: var(--fh-flame);
}

.page-faq .faq-topics__name {
  font-size: clamp(1.02rem, 2.1vw, 1.42rem);
  font-weight: 700;
  transition: color 0.25s var(--fh-ease);
}

.page-faq .faq-topics__link:hover .faq-topics__name {
  color: var(--fh-amber);
}

.page-faq .faq-topics__count {
  font-family: var(--fh-font-mono);
  font-size: 0.78rem;
  color: var(--fh-mist);
  white-space: nowrap;
}

.page-faq .faq-index__media {
  margin: 0;
  border: var(--faq-rule);
  background: var(--fh-ink);
  position: relative;
  overflow: hidden;
}

.page-faq .faq-index__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(47, 224, 214, 0.12), rgba(10, 11, 13, 0) 58%);
  pointer-events: none;
}

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

/* ---------- 主题章节 ---------- */

.page-faq .faq-topic__body {
  gap: clamp(26px, 4.5vw, 56px);
  align-items: start;
}

.page-faq .faq-list {
  border-top: var(--faq-rule);
}

.page-faq .faq-item {
  border-bottom: var(--faq-rule);
}

.page-faq .faq-item > summary {
  display: flex;
  align-items: flex-start;
  gap: 18px;
  padding: clamp(16px, 2.3vw, 24px) 0;
  cursor: pointer;
  list-style: none;
}

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

.page-faq .faq-item__q {
  font-size: clamp(0.99rem, 1.55vw, 1.16rem);
  font-weight: 700;
  line-height: 1.6;
  color: var(--fh-bone);
  transition: color 0.25s var(--fh-ease);
}

.page-faq .faq-item > summary:hover .faq-item__q,
.page-faq .faq-item[open] .faq-item__q {
  color: var(--fh-amber);
}

.page-faq .faq-item__mark {
  position: relative;
  order: 2;
  flex: none;
  margin-left: auto;
  margin-top: 6px;
  width: 16px;
  height: 16px;
  border: 1px solid var(--fh-iron);
  transition: border-color 0.25s var(--fh-ease), background-color 0.25s var(--fh-ease);
}

.page-faq .faq-item > summary:hover .faq-item__mark,
.page-faq .faq-item[open] .faq-item__mark {
  border-color: var(--fh-flame);
  background: rgba(255, 90, 31, 0.10);
}

.page-faq .faq-item__mark::before,
.page-faq .faq-item__mark::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--fh-flame);
}

.page-faq .faq-item__mark::before {
  width: 8px;
  height: 1px;
  transform: translate(-50%, -50%);
}

.page-faq .faq-item__mark::after {
  width: 1px;
  height: 8px;
  transform: translate(-50%, -50%) scaleY(1);
  transition: transform 0.26s var(--fh-ease);
}

.page-faq .faq-item[open] .faq-item__mark::after {
  transform: translate(-50%, -50%) scaleY(0);
}

.page-faq .faq-item__a {
  margin: 0 0 clamp(18px, 2.5vw, 26px);
  padding: 4px 0 0 18px;
  border-left: 2px solid var(--fh-cyan);
  max-width: 46em;
}

.page-faq .faq-item__a p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.85;
  color: var(--fh-mist);
}

/* ---------- 旁注 ---------- */

.page-faq .faq-aside {
  margin: 0;
}

.page-faq .faq-aside__box {
  border: var(--faq-rule);
  background: var(--fh-ink);
  padding: clamp(20px, 3vw, 28px);
}

.page-faq .faq-aside__box--hot {
  border-color: rgba(255, 90, 31, 0.5);
  background: linear-gradient(150deg, rgba(194, 21, 27, 0.18), rgba(20, 23, 27, 0.9) 70%);
}

.page-faq .faq-aside__text {
  margin: 14px 0 0;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--fh-mist);
}

.page-faq .faq-aside__link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-top: 18px;
  padding: 10px 16px;
  border: 1px solid var(--fh-iron);
  color: var(--fh-bone);
  font-size: 0.88rem;
  text-decoration: none;
  transition: border-color 0.25s var(--fh-ease), color 0.25s var(--fh-ease), transform 0.25s var(--fh-ease);
}

.page-faq .faq-aside__link:hover,
.page-faq .faq-aside__link:focus-visible {
  border-color: var(--fh-cyan);
  color: var(--fh-cyan);
  transform: translateY(-2px);
}

.page-faq .faq-aside__link--hot {
  border-color: rgba(255, 90, 31, 0.6);
  color: var(--fh-amber);
}

.page-faq .faq-aside__link--hot:hover,
.page-faq .faq-aside__link--hot:focus-visible {
  border-color: var(--fh-flame);
  color: var(--fh-flame);
}

.page-faq .faq-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
}

/* ---------- 窄幅图带 ---------- */

.page-faq .faq-banner {
  margin: 0;
  border-top: var(--faq-rule);
  border-bottom: var(--faq-rule);
  overflow: hidden;
}

.page-faq .faq-banner img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1600 / 600;
  object-fit: cover;
}

/* ---------- 底部收口 ---------- */

.page-faq .faq-cta {
  padding-bottom: clamp(64px, 10vw, 140px);
}

.page-faq .faq-cta__band {
  display: grid;
  gap: clamp(26px, 4vw, 52px);
  padding: clamp(26px, 4.5vw, 56px);
  border-top: 2px solid var(--fh-teal);
  border-right: var(--faq-rule);
  border-bottom: var(--faq-rule);
  border-left: var(--faq-rule);
  background:
    linear-gradient(155deg, rgba(14, 107, 112, 0.30), rgba(10, 11, 13, 0) 68%),
    var(--fh-ink);
}

.page-faq .faq-cta__title {
  margin: 12px 0 0;
  font-size: clamp(1.5rem, 3.2vw, 2.3rem);
  font-weight: 800;
  line-height: 1.28;
  color: var(--fh-bone);
}

.page-faq .faq-cta__lead {
  margin: 18px 0 0;
  max-width: 40em;
  color: var(--fh-mist);
  font-size: 0.94rem;
}

.page-faq .faq-paths {
  display: grid;
  gap: 14px;
  align-content: start;
}

.page-faq .faq-path {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 18px 20px;
  border: 1px solid var(--fh-iron);
  background: rgba(10, 11, 13, 0.6);
  color: var(--fh-bone);
  text-decoration: none;
  transition: transform 0.25s var(--fh-ease), border-color 0.25s var(--fh-ease), background-color 0.25s var(--fh-ease);
}

.page-faq .faq-path:hover,
.page-faq .faq-path:focus-visible {
  transform: translateY(-4px);
  border-color: var(--fh-cyan);
  background: rgba(20, 23, 27, 0.92);
}

.page-faq .faq-path--hot {
  border-color: rgba(255, 90, 31, 0.55);
  background: rgba(194, 21, 27, 0.14);
}

.page-faq .faq-path--hot:hover,
.page-faq .faq-path--hot:focus-visible {
  border-color: var(--fh-flame);
  background: rgba(194, 21, 27, 0.24);
}

.page-faq .faq-path__label {
  display: block;
  font-size: 1rem;
  font-weight: 700;
}

.page-faq .faq-path__desc {
  display: block;
  margin-top: 5px;
  font-size: 0.82rem;
  font-weight: 400;
  color: var(--fh-mist);
}

.page-faq .faq-path__arrow {
  margin-left: auto;
  font-family: var(--fh-font-mono);
  font-size: 1.05rem;
  color: var(--fh-flame);
}

/* ---------- 响应式 ---------- */

@media (max-width: 900px) {
  .page-faq .faq-hero__title {
    font-size: clamp(2rem, 9vw, 3.1rem);
  }

  .page-faq .faq-hero__stats {
    gap: 20px 32px;
  }

  .page-faq .faq-index__grid,
  .page-faq .faq-topic__body {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-faq .faq-index__media {
    margin-top: 8px;
  }

  .page-faq .faq-item__q {
    font-size: 1rem;
  }

  .page-faq .faq-banner img {
    aspect-ratio: 16 / 9;
  }
}

@media (min-width: 901px) {
  .page-faq .faq-aside {
    position: sticky;
    top: calc(var(--fh-nav-h) + 28px);
  }

  .page-faq .faq-cta__band {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: center;
  }
}