.page-faq {
  --faq-h1: clamp(32px, 5.2vw, 64px);
  --faq-rail: 232px;
  --faq-ans: clamp(15px, .34vw + 13.7px, 17px);
  --faq-gap: clamp(14px, 2vw, 22px);
  padding-top: calc(var(--bar-h) + 12px);
  padding-bottom: clamp(48px, 7vw, 96px);
  overflow-x: clip;
}

/* ---------- 头部 ---------- */

.page-faq .faq-head {
  padding-top: clamp(4px, 1.5vw, 16px);
}

.page-faq .faq-head__grid {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
  padding-top: clamp(20px, 3.5vw, 48px);
}

.page-faq .faq-head__title {
  margin: .38em 0 0;
  font-size: var(--faq-h1);
  font-weight: 300;
  line-height: 1.08;
  letter-spacing: -.012em;
  color: var(--white);
  max-width: 20ch;
}

.page-faq .faq-head .lede {
  margin-top: 1.1em;
  max-width: 46ch;
  color: var(--mute);
}

.page-faq .faq-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 30px;
  margin: clamp(22px, 3vw, 34px) 0 0;
  padding: 16px 0 0;
  border-top: 1px solid var(--hair);
  list-style: none;
}

.page-faq .faq-meta__item {
  min-width: 8ch;
}

.page-faq .faq-meta__k {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: .08em;
  color: var(--mute-dim);
}

.page-faq .faq-meta__v {
  display: block;
  margin-top: 5px;
  font-size: var(--fs-sm);
  color: var(--white);
}

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

.page-faq .faq-head__figure .media-frame {
  border-radius: 0;
}

/* ---------- 首屏六条 ---------- */

.page-faq .faq-priority {
  position: relative;
  margin-top: clamp(40px, 7vw, 88px);
  padding: clamp(36px, 6vw, 76px) 0;
  background: linear-gradient(180deg, rgba(18, 42, 64, .62), rgba(10, 26, 42, 0) 82%);
}

.page-faq .faq-priority__head {
  max-width: 46ch;
  margin-bottom: clamp(18px, 3vw, 32px);
}

.page-faq .faq-priority__title {
  margin: .45em 0 0;
  font-size: clamp(20px, 1.7vw + 14px, 32px);
  font-weight: 400;
  line-height: 1.3;
  color: var(--white);
}

.page-faq .faq-priority__list {
  border-top: 1px solid var(--hair-strong);
}

/* ---------- 手风琴条目 ---------- */

.page-faq .faq-item {
  border-left: 2px solid transparent;
  border-bottom: 1px solid var(--hair);
  padding-left: clamp(12px, 2vw, 22px);
  transition: border-left-color 160ms var(--ease);
}

.page-faq .faq-priority__list .faq-item {
  border-bottom-color: var(--hair-strong);
}

.page-faq .faq-item[open] {
  border-left-color: var(--cyan);
}

.page-faq .faq-item__q {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: clamp(12px, 2vw, 20px);
  align-items: center;
  padding: clamp(16px, 2.4vw, 24px) 0;
  cursor: pointer;
  list-style: none;
}

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

.page-faq .faq-item__q:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 4px;
}

.page-faq .faq-item__num {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: .08em;
  color: var(--mute-dim);
  white-space: nowrap;
  transform-origin: left center;
  transition: color 160ms var(--ease), transform 160ms var(--ease);
}

.page-faq .faq-item[open] .faq-item__num {
  color: var(--cyan);
  transform: scale(1.12);
}

.page-faq .faq-item__text {
  font-size: var(--fs-body);
  line-height: 1.55;
  color: var(--white);
}

.page-faq .faq-priority__list .faq-item__text {
  font-size: clamp(18px, 1.4vw + 13px, 26px);
  line-height: 1.5;
  letter-spacing: -.005em;
}

.page-faq .faq-item__mark {
  position: relative;
  display: block;
  width: 15px;
  height: 15px;
}

.page-faq .faq-item__mark::before,
.page-faq .faq-item__mark::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 0;
  width: 100%;
  height: 1px;
  background: var(--mute-dim);
  transition: background 160ms var(--ease), transform 160ms var(--ease);
}

.page-faq .faq-item__mark::after {
  transform: rotate(90deg);
}

.page-faq .faq-item[open] .faq-item__mark::before,
.page-faq .faq-item[open] .faq-item__mark::after {
  background: var(--cyan);
}

.page-faq .faq-item[open] .faq-item__mark::after {
  transform: rotate(0deg);
}

.page-faq .faq-item__a {
  padding: 0 0 clamp(18px, 2.6vw, 28px);
  padding-left: clamp(0px, 3.2vw, 46px);
}

.page-faq .faq-item__a p {
  margin: 0;
  max-width: 62ch;
  font-size: var(--faq-ans);
  line-height: 1.85;
  color: var(--mute);
}

.page-faq .faq-item__a p + p {
  margin-top: .8em;
}

.page-faq .faq-item__a .text-accent {
  text-decoration: none;
  border-bottom: 1px solid rgba(59, 240, 210, .45);
}

.page-faq .faq-steps {
  counter-reset: step;
  list-style: none;
  display: grid;
  gap: 10px;
  margin: 0 0 14px;
  padding: 0;
}

.page-faq .faq-steps li {
  position: relative;
  counter-increment: step;
  padding-left: 36px;
  font-size: var(--faq-ans);
  line-height: 1.7;
  color: var(--mute);
}

.page-faq .faq-steps li::before {
  content: counter(step, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 2px;
  padding: 1px 5px;
  border: 1px solid var(--hair-strong);
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: .06em;
  color: var(--cyan);
}

/* ---------- 主体：分类索引 + 问答长卷 ---------- */

.page-faq .faq-body {
  display: grid;
  gap: clamp(32px, 6vw, 64px);
  margin-top: clamp(44px, 7vw, 96px);
}

.page-faq .faq-rail__label {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: .14em;
  color: var(--mute-dim);
}

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

.page-faq .faq-rail__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  padding: 0 14px;
  border: 1px solid var(--hair);
  font-size: var(--fs-sm);
  color: var(--white);
  text-decoration: none;
  transition: border-color 160ms var(--ease), color 160ms var(--ease);
}

.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible {
  border-color: var(--cyan);
  color: var(--cyan);
}

.page-faq .faq-rail__num {
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: .08em;
  color: var(--mute-dim);
}

.page-faq .faq-rail__figure {
  display: none;
  margin: 30px 0 0;
}

.page-faq .faq-stream {
  display: flex;
  flex-direction: column;
  gap: clamp(34px, 5vw, 72px);
  min-width: 0;
}

.page-faq .faq-group {
  scroll-margin-top: calc(var(--bar-h) + 28px);
}

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--hair-strong);
  margin-bottom: 2px;
}

.page-faq .faq-group__num {
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: .12em;
  color: var(--cyan);
}

.page-faq .faq-group__title {
  margin: 0;
  font-size: clamp(20px, 1.5vw + 14px, 30px);
  font-weight: 400;
  line-height: 1.25;
  letter-spacing: -.01em;
  color: var(--white);
}

.page-faq .faq-group .faq-item__text {
  font-size: clamp(16px, .4vw + 14.5px, 19px);
}

.page-faq .faq-group .faq-item__q {
  padding: clamp(14px, 2vw, 20px) 0;
}

/* ---------- 收束 ---------- */

.page-faq .faq-help {
  margin-top: clamp(48px, 8vw, 108px);
}

.page-faq .faq-help__panel {
  padding: clamp(26px, 4vw, 56px);
}

.page-faq .faq-help__grid {
  display: grid;
  gap: clamp(26px, 4vw, 52px);
}

.page-faq .faq-help__title {
  margin: .45em 0 0;
  font-size: clamp(22px, 1.8vw + 15px, 38px);
  font-weight: 300;
  line-height: 1.22;
  letter-spacing: -.01em;
  color: var(--white);
}

.page-faq .faq-help__text {
  margin: 1.2em 0 0;
  max-width: 46ch;
  font-size: var(--faq-ans);
  line-height: 1.85;
  color: var(--mute);
}

.page-faq .faq-help__text .text-accent {
  text-decoration: none;
  border-bottom: 1px solid rgba(59, 240, 210, .45);
}

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

.page-faq .faq-help__contact-row {
  display: grid;
  grid-template-columns: 8ch minmax(0, 1fr);
  gap: 12px;
  padding: 13px 0;
  border-bottom: 1px solid var(--hair);
}

.page-faq .faq-help__contact-label {
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: .08em;
  color: var(--mute-dim);
  padding-top: 3px;
}

.page-faq .faq-help__contact-value {
  margin: 0;
  font-size: var(--fs-sm);
  line-height: 1.6;
  color: var(--white);
  word-break: break-word;
}

.page-faq .faq-help__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 30px);
}

/* ---------- 响应式 ---------- */

@media (min-width: 720px) {
  .page-faq .faq-item__a {
    padding-left: clamp(0px, 4vw, 56px);
  }
}

@media (min-width: 900px) {
  .page-faq .faq-head__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
  }

  .page-faq .faq-help__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    align-items: start;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-body {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: calc(var(--bar-h) + 32px);
  }

  .page-faq .faq-rail__list {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 0;
    border-left: 1px solid var(--hair);
  }

  .page-faq .faq-rail__link {
    display: flex;
    min-height: 0;
    padding: 11px 12px 11px 16px;
    border: 0;
    border-left: 2px solid transparent;
    margin-left: -1px;
  }

  .page-faq .faq-rail__link:hover,
  .page-faq .faq-rail__link:focus-visible {
    border-left-color: var(--cyan);
    color: var(--cyan);
  }

  .page-faq .faq-rail__figure {
    display: block;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item,
  .page-faq .faq-item__num,
  .page-faq .faq-item__mark::before,
  .page-faq .faq-item__mark::after,
  .page-faq .faq-rail__link {
    transition: none;
  }

  .page-faq .faq-item[open] .faq-item__num {
    transform: none;
  }
}