.page-faq {
  --faq-pad: clamp(20px, 4vw, 40px);
  --faq-line: rgba(198, 208, 221, .18);
  background: var(--hth-night);
  color: var(--hth-on-dark);
  font-family: var(--hth-sans);
  padding-top: calc(var(--hth-header-h) + 24px);
  overflow-x: hidden;
}

.page-faq .hth-lede {
  color: var(--hth-on-dark-dim);
}

/* ---------- 面包屑 ---------- */
.page-faq .hth-crumbs {
  margin-bottom: 24px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding-top: clamp(16px, 3vw, 40px);
  padding-bottom: clamp(32px, 5vw, 64px);
}

.page-faq .faq-hero__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 5vw, 56px);
  align-items: center;
}

.page-faq .hth-eyebrow {
  font-family: var(--hth-serif);
  letter-spacing: .12em;
  color: var(--hth-neon);
}

.page-faq .faq-hero__title {
  font-family: var(--hth-sans);
  font-weight: 900;
  letter-spacing: -.02em;
  font-size: clamp(30px, 6vw, 58px);
  line-height: 1.18;
  margin: 14px 0 20px;
  color: #fff;
  max-width: 16em;
}

.page-faq .faq-hero__lede {
  max-width: 40em;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.8;
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.page-faq .faq-hero__figure {
  margin: 0;
  border: 1px solid var(--hth-line);
  background: var(--hth-stand);
  position: relative;
}

.page-faq .faq-hero__figure::after {
  content: "";
  position: absolute;
  inset: auto 0 0 auto;
  width: 42%;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--hth-neon));
}

.page-faq .faq-hero__figure .hth-figure__media,
.page-faq .faq-hero__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 两条结论卡片 ---------- */
.page-faq .faq-quick__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}

.page-faq .faq-quick__card {
  border: 1px solid var(--hth-line);
  border-top: 2px solid var(--hth-touch);
  background: linear-gradient(160deg, var(--hth-stand) 0%, var(--hth-night-deep) 100%);
  padding: 28px 24px 24px;
  position: relative;
  overflow: hidden;
}

.page-faq .faq-quick__card--neon {
  border-top-color: var(--hth-neon);
}

.page-faq .faq-quick__card::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(198, 208, 221, .07) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(198, 208, 221, .07) 1px, transparent 1px);
  background-size: 48px 48px;
  pointer-events: none;
}

.page-faq .faq-quick__tag {
  font-family: var(--hth-serif);
  font-size: 13px;
  letter-spacing: .2em;
  color: var(--hth-note);
  margin: 0 0 16px;
  position: relative;
}

.page-faq .faq-quick__value {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin: 0 0 16px;
  position: relative;
}

.page-faq .faq-quick__num {
  font-family: var(--hth-mono);
  font-weight: 600;
  font-size: clamp(42px, 8vw, 64px);
  line-height: 1;
  color: var(--hth-neon);
}

.page-faq .faq-quick__unit {
  font-size: 15px;
  color: var(--hth-on-dark-dim);
  letter-spacing: .06em;
}

.page-faq .faq-quick__desc {
  position: relative;
  margin: 0 0 18px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--hth-on-dark-dim);
  max-width: 34em;
}

.page-faq .faq-quick__jump {
  position: relative;
  display: inline-block;
  font-size: 14px;
  color: var(--hth-mist);
  text-decoration: none;
  border-bottom: 1px dashed rgba(169, 247, 220, .5);
  padding-bottom: 2px;
}

.page-faq .faq-quick__jump:hover,
.page-faq .faq-quick__jump:focus-visible {
  color: var(--hth-neon);
  border-bottom-color: var(--hth-neon);
}

/* ---------- 筛选条 ---------- */
.page-faq .faq-filterbar {
  padding-top: 12px;
  padding-bottom: 12px;
  border-top: 1px solid var(--hth-line);
  border-bottom: 1px solid var(--hth-line);
}

.page-faq .faq-filter {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.page-faq .faq-filter .hth-filter__btn {
  background: transparent;
  border: 1px solid var(--hth-line-strong);
  color: var(--hth-on-dark-dim);
  font-family: var(--hth-sans);
  font-size: 14px;
  padding: 8px 16px;
  border-radius: 0;
  cursor: pointer;
  transition: color .25s var(--hth-ease), border-color .25s var(--hth-ease), background .25s var(--hth-ease);
}

.page-faq .faq-filter .hth-filter__btn:hover,
.page-faq .faq-filter .hth-filter__btn:focus-visible {
  color: var(--hth-on-dark);
  border-color: var(--hth-neon);
}

.page-faq .faq-filter .hth-filter__btn[aria-pressed="true"] {
  background: var(--hth-neon);
  border-color: var(--hth-neon);
  color: var(--hth-night);
  font-weight: 600;
}

.page-faq .hth-filter__count {
  margin-left: auto;
  font-family: var(--hth-mono);
  font-weight: 600;
  font-size: 14px;
  color: var(--hth-note);
}

/* ---------- 问答区块 ---------- */
.page-faq .faq-block {
  padding-block: clamp(36px, 6vw, 72px);
  border-bottom: 1px solid var(--hth-line);
}

.page-faq .faq-block__head {
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-areas:
    "idx title"
    "idx note";
  column-gap: 16px;
  row-gap: 8px;
  align-items: start;
  margin-bottom: 28px;
}

.page-faq .faq-block__idx {
  grid-area: idx;
  font-family: var(--hth-mono);
  font-weight: 600;
  font-size: 15px;
  color: var(--hth-night);
  background: var(--hth-neon);
  width: 30px;
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 6px;
}

.page-faq .faq-block__title {
  grid-area: title;
  font-family: var(--hth-sans);
  font-weight: 800;
  letter-spacing: -.015em;
  font-size: clamp(22px, 3.4vw, 36px);
  line-height: 1.3;
  margin: 0;
  color: #fff;
}

.page-faq .faq-block__note {
  grid-area: note;
  margin: 0;
  font-size: 14px;
  color: var(--hth-note);
}

/* ---------- 折叠问答条目 ---------- */
.page-faq .faq-list {
  border-bottom: 1px solid var(--hth-line);
}

.page-faq .faq-item {
  position: relative;
  border-top: 1px solid var(--hth-line);
  border-left: 2px solid transparent;
  padding-inline: 4px 8px;
  transition: border-color .3s var(--hth-ease), background-color .3s var(--hth-ease);
}

.page-faq .faq-item:first-child {
  border-top: 0;
}

.page-faq .faq-item[open] {
  border-left-color: var(--hth-neon);
  background: linear-gradient(90deg, rgba(40, 240, 168, .07), rgba(40, 240, 168, 0) 55%);
}

.page-faq .faq-item__q {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 20px 0;
  cursor: pointer;
  list-style: none;
  font-size: clamp(15px, 1.6vw, 17px);
  font-weight: 600;
  line-height: 1.7;
  color: var(--hth-on-dark);
  transition: color .25s var(--hth-ease);
}

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

.page-faq .faq-item__q:hover {
  color: #fff;
}

.page-faq .faq-item__q:focus-visible {
  outline: 2px solid var(--hth-neon);
  outline-offset: 2px;
}

.page-faq .faq-item__no {
  font-family: var(--hth-mono);
  font-weight: 600;
  font-size: 13px;
  color: var(--hth-neon);
  flex: 0 0 auto;
  padding-top: 2px;
}

.page-faq .faq-item__text {
  flex: 1 1 auto;
}

.page-faq .faq-item__q::after {
  content: "+";
  flex: 0 0 auto;
  font-family: var(--hth-mono);
  font-size: 20px;
  line-height: 1;
  color: var(--hth-neon);
  transition: transform .3s var(--hth-ease);
}

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

.page-faq .faq-item__a {
  padding: 0 0 22px calc(14px + 1.6em);
  max-width: 62em;
}

.page-faq .faq-item__a p {
  margin: 0 0 12px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--hth-on-dark-dim);
}

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

.page-faq .faq-item__a a {
  color: var(--hth-mist);
  text-decoration: none;
  border-bottom: 1px solid rgba(169, 247, 220, .45);
}

.page-faq .faq-item__a a:hover,
.page-faq .faq-item__a a:focus-visible {
  color: var(--hth-neon);
  border-bottom-color: var(--hth-neon);
}

/* ---------- 入口收藏区块的分栏 ---------- */
.page-faq .faq-block__split {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

.page-faq .faq-block__figure {
  margin: 0;
  border: 1px solid var(--hth-line);
  background: var(--hth-stand);
}

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

.page-faq .faq-block__figure .hth-figure__cap {
  padding: 12px 16px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--hth-note);
  border-top: 1px solid var(--hth-line);
}

/* ---------- 数据指标条 ---------- */
.page-faq .faq-data__stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--hth-line);
  border: 1px solid var(--hth-line);
  margin-bottom: 28px;
}

.page-faq .faq-metric {
  background: var(--hth-night-deep);
  padding: 20px 18px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.page-faq .faq-metric .hth-metric__value {
  font-family: var(--hth-mono);
  font-weight: 600;
  font-size: clamp(26px, 4.4vw, 38px);
  line-height: 1;
  color: var(--hth-neon);
}

.page-faq .faq-metric .hth-metric__label {
  font-size: 13px;
  color: var(--hth-note);
  line-height: 1.6;
}

/* ---------- 人工处理 ---------- */
.page-faq .faq-help {
  padding-block: clamp(36px, 6vw, 72px);
}

.page-faq .faq-help__panel {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  border: 1px solid var(--hth-line-strong);
  background:
    radial-gradient(120% 140% at 0% 0%, rgba(30, 78, 140, .55), rgba(6, 21, 43, 0) 62%),
    var(--hth-night-deep);
  padding: clamp(24px, 4vw, 44px);
}

.page-faq .faq-help__title {
  font-family: var(--hth-sans);
  font-weight: 800;
  letter-spacing: -.015em;
  font-size: clamp(21px, 3.2vw, 32px);
  line-height: 1.35;
  margin: 12px 0 18px;
  color: #fff;
}

.page-faq .faq-help__desc {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--hth-on-dark-dim);
  max-width: 42em;
}

.page-faq .faq-help__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.page-faq .faq-help__contact {
  margin: 0;
  border-top: 1px solid var(--hth-line);
}

.page-faq .faq-help__row {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 0;
  border-bottom: 1px solid var(--hth-line);
}

.page-faq .faq-help__row dt {
  font-family: var(--hth-serif);
  font-size: 13px;
  letter-spacing: .14em;
  color: var(--hth-note);
}

.page-faq .faq-help__row dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--hth-on-dark);
  word-break: break-word;
}

.page-faq .faq-help__row dd.hth-num {
  font-family: var(--hth-mono);
  font-weight: 600;
  letter-spacing: .02em;
  color: var(--hth-neon);
}

/* ---------- 关键词标签 ---------- */
.page-faq .faq-tags-block {
  padding-block: clamp(32px, 5vw, 64px) clamp(48px, 7vw, 96px);
}

.page-faq .faq-tags-block__title {
  font-family: var(--hth-sans);
  font-weight: 800;
  letter-spacing: -.015em;
  font-size: clamp(22px, 3.4vw, 34px);
  margin: 0 0 10px;
  color: #fff;
}

.page-faq .faq-tags-block__note {
  margin: 0 0 24px;
  font-size: 14px;
  color: var(--hth-note);
}

.page-faq .faq-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-faq .faq-tag {
  display: inline-block;
  background: var(--hth-mist);
  color: var(--hth-ink);
  font-size: 14px;
  line-height: 1.5;
  padding: 8px 14px;
  text-decoration: none;
  border-radius: 0;
  transition: background-color .25s var(--hth-ease), color .25s var(--hth-ease), transform .25s var(--hth-ease);
}

.page-faq .faq-tag:hover,
.page-faq .faq-tag:focus-visible {
  background: var(--hth-neon);
  color: var(--hth-night);
  transform: translateY(-2px);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-quick__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-faq .faq-data__stats {
    grid-template-columns: repeat(4, 1fr);
  }

  .page-faq .faq-help__row {
    flex-direction: row;
    align-items: baseline;
    gap: 20px;
  }

  .page-faq .faq-help__row dt {
    flex: 0 0 96px;
  }
}

@media (min-width: 900px) {
  .page-faq {
    padding-top: calc(var(--hth-header-h) + 36px);
  }

  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
  }

  .page-faq .faq-block__split {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, .75fr);
    align-items: start;
    gap: 44px;
  }

  .page-faq .faq-block__figure {
    position: sticky;
    top: calc(var(--hth-header-h-s) + 24px);
  }

  .page-faq .faq-help__panel {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, .7fr);
    gap: 48px;
    align-items: start;
  }

  .page-faq .faq-help__contact {
    border-top: 0;
  }

  .page-faq .faq-help__row:first-child {
    border-top: 1px solid var(--hth-line);
  }
}

@media (min-width: 1100px) {
  .page-faq .faq-item__q {
    padding: 24px 8px;
  }

  .page-faq .faq-item__a {
    padding-left: calc(14px + 2em);
    padding-bottom: 28px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-tag,
  .page-faq .faq-item__q::after,
  .page-faq .faq-item,
  .page-faq .hth-filter__btn {
    transition: none;
  }

  .page-faq .faq-tag:hover,
  .page-faq .faq-tag:focus-visible {
    transform: none;
  }
}