.page-faq {
  --faq-gap: clamp(20px, 3.4vw, 44px);
  --faq-pad: clamp(16px, 3vw, 30px);
  --faq-fade: cubic-bezier(.2, .7, .3, 1);
  padding-bottom: clamp(40px, 7vw, 88px);
}

/* ---------- 面包屑 ---------- */
.page-faq .faq-crumb {
  padding: clamp(16px, 3vw, 28px) 0 clamp(10px, 2vw, 16px);
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--frost);
}
.page-faq .faq-crumb a {
  color: var(--frost);
  text-decoration: none;
  transition: color .18s var(--faq-fade);
}
.page-faq .faq-crumb a:hover,
.page-faq .faq-crumb a:focus-visible {
  color: var(--cyan);
}

/* ---------- 首屏框景 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 0 var(--cut) 0 var(--cut);
  background:
    radial-gradient(120% 140% at 100% 0%, var(--cyan-wash), transparent 58%),
    var(--ink);
  padding: clamp(26px, 5vw, 56px) clamp(20px, 4vw, 48px) clamp(24px, 4vw, 44px);
}
.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 9px;
  background-image: repeating-linear-gradient(90deg, var(--line-2) 0 1px, transparent 1px 24px);
  opacity: .55;
  pointer-events: none;
}
.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  right: -70px;
  bottom: -90px;
  width: 240px;
  height: 240px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(56, 225, 214, .16), transparent 70%);
  pointer-events: none;
}
.page-faq .faq-hero h1 {
  position: relative;
  margin: 12px 0 0;
  font-family: var(--f-head);
  font-weight: 900;
  font-size: clamp(30px, 5.6vw, 62px);
  line-height: 1.06;
  letter-spacing: -.02em;
  color: var(--ice);
  max-width: 16em;
}
.page-faq .faq-hero .lede {
  position: relative;
  margin: clamp(14px, 2vw, 22px) 0 0;
  max-width: 58ch;
  color: var(--text);
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.85;
}

/* ---------- 首屏数据条 ---------- */
.page-faq .faq-facts {
  position: relative;
  list-style: none;
  margin: clamp(22px, 3.6vw, 36px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: 0 var(--cut) 0 var(--cut);
  overflow: hidden;
}
.page-faq .faq-facts__item {
  background: var(--deep);
  padding: 14px clamp(12px, 2vw, 20px) 16px;
  display: flex;
  flex-direction: column;
  gap: 5px;
}
.page-faq .faq-facts__num {
  font-family: var(--f-mono);
  font-size: clamp(26px, 3.4vw, 38px);
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
}
.page-faq .faq-facts__label {
  font-size: 12.5px;
  letter-spacing: .05em;
  color: var(--frost);
}

/* ---------- 横向主题带 ---------- */
.page-faq .faq-band {
  margin-top: clamp(22px, 3.4vw, 38px);
}

/* ---------- 两栏主体 ---------- */
.page-faq .faq-stage {
  margin-top: var(--faq-gap);
  display: grid;
  gap: var(--faq-gap);
}

/* ---------- 分类目录 ---------- */
.page-faq .faq-toc__title {
  margin: 0 0 10px;
  font-family: var(--f-mono);
  font-size: 11.5px;
  font-weight: 500;
  letter-spacing: .18em;
  color: var(--frost);
}
.page-faq .faq-toc__list {
  list-style: none;
  margin: 0;
  padding: 0 0 6px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}
.page-faq .faq-toc__row {
  flex: 0 0 auto;
}
.page-faq .faq-toc__link {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--text);
  text-decoration: none;
  font-size: 14px;
  white-space: nowrap;
  transition: border-color .18s var(--faq-fade), background .18s var(--faq-fade), color .18s var(--faq-fade);
}
.page-faq .faq-toc__num {
  font-family: var(--f-mono);
  font-size: 11px;
  color: var(--cyan);
}
.page-faq .faq-toc__count {
  font-family: var(--f-mono);
  font-size: 11px;
  color: var(--frost);
}
.page-faq .faq-toc__link:hover,
.page-faq .faq-toc__link:focus-visible {
  border-color: var(--cyan);
  background: var(--cyan-wash);
  color: var(--ice);
}

/* ---------- 分类手风琴 ---------- */
.page-faq .faq-cat {
  background: var(--ink);
  border: 1px solid var(--line);
  border-radius: 0 var(--cut) 0 var(--cut);
  margin-bottom: clamp(14px, 2.2vw, 22px);
  transition: border-color .2s var(--faq-fade);
}
.page-faq .faq-cat:last-child {
  margin-bottom: 0;
}
.page-faq .faq-cat[open] {
  border-color: rgba(56, 225, 214, .34);
}
.page-faq .faq-cat__head {
  display: flex;
  align-items: center;
  gap: clamp(10px, 1.6vw, 16px);
  padding: clamp(16px, 2.6vw, 22px) var(--faq-pad);
  cursor: pointer;
  list-style: none;
  border-left: 3px solid transparent;
  transition: border-color .22s var(--faq-fade), background .22s var(--faq-fade);
}
.page-faq .faq-cat__head::-webkit-details-marker {
  display: none;
}
.page-faq .faq-cat__head:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -2px;
}
.page-faq .faq-cat[open] > .faq-cat__head {
  border-left-color: var(--cyan);
  background: linear-gradient(90deg, var(--cyan-wash), transparent 72%);
}
.page-faq .faq-cat__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 auto;
  width: 38px;
  height: 38px;
  color: var(--cyan);
  border: 1px solid var(--line-2);
  border-radius: 0 10px 0 10px;
  background: rgba(56, 225, 214, .06);
  transition: background .22s var(--faq-fade), color .22s var(--faq-fade), border-color .22s var(--faq-fade);
}
.page-faq .faq-cat[open] .faq-cat__icon {
  color: var(--deep);
  background: var(--cyan);
  border-color: var(--cyan);
}
.page-faq .faq-cat__title {
  flex: 1 1 auto;
  margin: 0;
  font-family: var(--f-head);
  font-size: clamp(19px, 2.4vw, 26px);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -.01em;
  color: var(--ice);
}
.page-faq .faq-cat__meta {
  flex: 0 0 auto;
  font-family: var(--f-mono);
  font-size: 12px;
  color: var(--frost);
  white-space: nowrap;
}
.page-faq .faq-cat__chev {
  flex: 0 0 auto;
  width: 9px;
  height: 9px;
  margin-right: 3px;
  border-right: 1.5px solid var(--frost);
  border-bottom: 1.5px solid var(--frost);
  transform: rotate(45deg);
  transition: transform .22s var(--faq-fade), border-color .22s var(--faq-fade);
}
.page-faq .faq-cat[open] .faq-cat__chev {
  transform: rotate(-135deg);
  border-color: var(--cyan);
}

.page-faq .faq-cat__body {
  border-top: 1px solid var(--line);
  padding: 0 var(--faq-pad) clamp(18px, 3vw, 28px);
  animation: faq-cat-in .24s var(--faq-fade);
}
@keyframes faq-cat-in {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: none; }
}

/* ---------- 分类引言与配图 ---------- */
.page-faq .faq-cat__intro {
  display: grid;
  gap: clamp(16px, 2.6vw, 28px);
  align-items: start;
  padding: clamp(18px, 3vw, 26px) 0;
}
.page-faq .faq-figure {
  margin: 0;
}
.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: 0 var(--cut) 0 var(--cut);
  filter: saturate(.92) contrast(1.04);
}
.page-faq .faq-figure--wide img {
  aspect-ratio: 7 / 4;
}
.page-faq .faq-figure .figure__cap {
  display: block;
  margin-top: 10px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--frost);
}
.page-faq .faq-cat__note {
  margin: 0;
  max-width: 58ch;
  color: var(--text);
  font-size: 15px;
  line-height: 1.85;
}

/* ---------- 问答列表 ---------- */
.page-faq .faq-list {
  counter-reset: faq;
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}
.page-faq .faq-item {
  padding: 16px 0 15px;
  border-bottom: 1px solid var(--line);
  scroll-margin-top: 96px;
  transition: background .2s var(--faq-fade), box-shadow .2s var(--faq-fade);
}
.page-faq .faq-item:target {
  background: var(--cyan-wash);
  box-shadow: inset 2px 0 0 var(--cyan);
  padding-left: 12px;
}
.page-faq .faq-item__q {
  display: flex;
  gap: 9px;
  margin: 0;
  font-family: var(--f-body);
  font-size: 15.5px;
  font-weight: 700;
  line-height: 1.6;
  color: var(--ice);
}
.page-faq .faq-item__q::before {
  counter-increment: faq;
  content: counter(faq, decimal-leading-zero);
  flex: 0 0 auto;
  font-family: var(--f-mono);
  font-size: 11.5px;
  font-weight: 500;
  line-height: 2.15;
  color: var(--cyan);
}
.page-faq .faq-item__a {
  margin: 6px 0 0;
  padding-left: 26px;
  color: var(--text);
  font-size: 14.5px;
  line-height: 1.8;
}
.page-faq .faq-item__a a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(56, 225, 214, .38);
  transition: border-color .18s var(--faq-fade);
}
.page-faq .faq-item__a a:hover,
.page-faq .faq-item__a a:focus-visible {
  border-bottom-color: var(--cyan);
}

/* ---------- 仍未解决 ---------- */
.page-faq .faq-help {
  margin-top: clamp(34px, 6vw, 68px);
}
.page-faq .faq-help__panel {
  display: grid;
  gap: clamp(18px, 3vw, 32px);
  padding: clamp(24px, 4.4vw, 46px);
}
.page-faq .faq-help__panel h2 {
  margin: 8px 0 12px;
  font-family: var(--f-head);
  font-size: clamp(22px, 3vw, 32px);
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: -.02em;
  color: var(--ice);
}
.page-faq .faq-help__panel p {
  margin: 0;
  max-width: 58ch;
  color: var(--text);
  font-size: 15px;
  line-height: 1.85;
}
.page-faq .faq-help__act {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-content: center;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 780px) {
  .page-faq .faq-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: clamp(26px, 4vw, 52px);
  }
}

@media (min-width: 820px) {
  .page-faq .faq-help__panel {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-stage {
    grid-template-columns: 244px minmax(0, 1fr);
    gap: clamp(32px, 4vw, 64px);
    align-items: start;
  }
  .page-faq .faq-toc {
    position: sticky;
    top: clamp(20px, 4vh, 48px);
  }
  .page-faq .faq-toc__list {
    display: block;
    overflow: visible;
    padding: 0;
    border-left: 1px solid var(--line);
  }
  .page-faq .faq-toc__row {
    margin: 0;
  }
  .page-faq .faq-toc__link {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr) auto;
    align-items: baseline;
    gap: 10px;
    width: 100%;
    margin-left: -1px;
    padding: 11px 12px 11px 15px;
    border: 0;
    border-left: 2px solid transparent;
    border-radius: 0;
    white-space: normal;
    transition: border-color .18s var(--faq-fade), background .18s var(--faq-fade), color .18s var(--faq-fade);
  }
  .page-faq .faq-toc__link:hover,
  .page-faq .faq-toc__link:focus-visible {
    border-left-color: var(--cyan);
    background: linear-gradient(90deg, var(--cyan-wash), transparent);
  }
  .page-faq .faq-cat__intro {
    grid-template-columns: minmax(0, 240px) minmax(0, 1fr);
  }
  .page-faq .faq-cat__intro--stack {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (min-width: 1180px) {
  .page-faq .faq-cat__intro {
    grid-template-columns: minmax(0, 280px) minmax(0, 1fr);
  }
  .page-faq .faq-cat__intro--stack {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-cat__body {
    animation: none;
  }
  .page-faq .faq-cat__chev,
  .page-faq .faq-cat__icon,
  .page-faq .faq-toc__link,
  .page-faq .faq-item {
    transition: none;
  }
}