.page-faq {
  --faq-indent: 42px;
  display: block;
  overflow-x: clip;
}

.page-faq .faq-hero {
  position: relative;
  padding: clamp(26px, 4.6vw, 52px) 0 clamp(40px, 6vw, 72px);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: -34%;
  right: -14%;
  width: min(720px, 92vw);
  height: min(720px, 92vw);
  background: radial-gradient(circle at 50% 50%, rgba(155, 107, 255, .2), rgba(36, 224, 214, .06) 42%, transparent 68%);
  pointer-events: none;
  z-index: 0;
}

.page-faq .faq-hero__shell {
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
  margin-top: clamp(22px, 4vw, 42px);
}

.page-faq h1 {
  margin: 14px 0 0;
  font-size: clamp(27px, 5.2vw, 48px);
  line-height: 1.18;
  letter-spacing: -.02em;
  font-weight: 800;
  color: var(--fog);
  max-width: 19em;
  overflow-wrap: break-word;
}

.page-faq .faq-hero__lead {
  margin: 20px 0 0;
  max-width: 40em;
  font-size: clamp(15.5px, 1.85vw, 18px);
  line-height: 1.85;
  color: var(--silver);
}

.page-faq .faq-hero__stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.page-faq .faq-hero__stats li {
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--ink-850);
  padding: 16px 14px;
  display: grid;
  gap: 6px;
  min-width: 0;
}

.page-faq .faq-hero__num {
  font-size: clamp(22px, 3.6vw, 34px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--cyan);
}

.page-faq .faq-hero__unit {
  font-size: 12px;
  letter-spacing: .03em;
  color: var(--dust);
  line-height: 1.4;
}

.page-faq .faq-hero__figure {
  margin: clamp(26px, 4vw, 46px) 0 0;
}

/* ── 索引横带 ── */
.page-faq .faq-index {
  padding: clamp(34px, 5vw, 62px) 0;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, var(--ink-900) 0%, var(--ink-850) 100%);
}

.page-faq .faq-index__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px 20px;
  margin-bottom: 20px;
}

.page-faq .faq-index__title {
  margin: 0;
  font-size: clamp(19px, 2.6vw, 25px);
  letter-spacing: -.01em;
  color: var(--fog);
  font-weight: 800;
}

.page-faq .faq-index__note {
  margin: 0;
  font-size: 13px;
  color: var(--dust);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-faq .faq-index__item {
  min-width: 0;
}

.page-faq .faq-index__item a {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  grid-template-areas:
    "no name"
    "no meta";
  align-items: center;
  gap: 3px 12px;
  min-height: 86px;
  padding: 16px 18px;
  background: var(--ink-850);
  color: var(--fog);
  text-decoration: none;
  position: relative;
  transition: background .24s var(--ease);
}

.page-faq .faq-index__item a::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--violet);
  transform: scaleY(0);
  transform-origin: top center;
  transition: transform .3s var(--ease), background .3s var(--ease);
}

.page-faq .faq-index__item a:hover,
.page-faq .faq-index__item a:focus-visible {
  background: var(--ink-800);
}

.page-faq .faq-index__item a:hover::after,
.page-faq .faq-index__item a:focus-visible::after {
  transform: scaleY(1);
  background: var(--cyan);
}

.page-faq .faq-index__no {
  grid-area: no;
  font-size: 21px;
  font-weight: 700;
  line-height: 1;
  color: var(--violet);
}

.page-faq .faq-index__name {
  grid-area: name;
  font-size: 15.5px;
  font-weight: 700;
  line-height: 1.45;
  overflow-wrap: break-word;
}

.page-faq .faq-index__meta {
  grid-area: meta;
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--dust);
}

/* ── 问答分组 ── */
.page-faq .faq-group {
  padding: clamp(42px, 6vw, 88px) 0;
  border-bottom: 1px solid var(--line);
  position: relative;
}

.page-faq .faq-group__inner {
  display: grid;
  gap: clamp(20px, 3vw, 34px);
}

.page-faq .faq-group__head h2 {
  margin: 12px 0 0;
  font-size: clamp(21px, 3.3vw, 31px);
  line-height: 1.26;
  letter-spacing: -.015em;
  font-weight: 800;
  color: var(--fog);
}

.page-faq .faq-group__head .eyebrow {
  margin: 0;
}

.page-faq .faq-group__desc {
  margin: 14px 0 0;
  font-size: 14.5px;
  line-height: 1.82;
  color: var(--dust);
  max-width: 30em;
}

.page-faq .faq-group__main {
  min-width: 0;
}

.page-faq .faq-group__figure {
  margin: 0 0 clamp(20px, 3vw, 30px);
}

.page-faq .faq-list {
  display: grid;
  gap: 4px;
}

/* ── 可展开问答 ── */
.page-faq .qa {
  border-left: 2px solid var(--line);
  padding-left: clamp(14px, 2.2vw, 22px);
  transition: border-color .3s var(--ease);
}

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

.page-faq .qa__q {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 15px 2px 15px 0;
  cursor: pointer;
  list-style: none;
  font-size: clamp(15.5px, 2.1vw, 18px);
  font-weight: 700;
  line-height: 1.6;
  color: var(--fog);
  transition: color .24s var(--ease);
}

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

.page-faq .qa__q::marker {
  content: "";
}

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

.page-faq .qa__q::after {
  content: "";
  flex: 0 0 auto;
  width: 9px;
  height: 9px;
  margin: 8px 4px 0 auto;
  border-right: 1.5px solid var(--violet);
  border-bottom: 1.5px solid var(--violet);
  transform: rotate(45deg);
  transition: transform .32s var(--ease), border-color .32s var(--ease), margin .32s var(--ease);
}

.page-faq .qa[open] .qa__q::after {
  border-color: var(--cyan);
  transform: rotate(-135deg);
  margin-top: 12px;
}

.page-faq .qa__no {
  flex: 0 0 auto;
  width: 30px;
  font-size: 13px;
  letter-spacing: .05em;
  color: var(--violet);
  padding-top: 4px;
  transition: color .3s var(--ease);
}

.page-faq .qa[open] .qa__no {
  color: var(--cyan);
}

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

.page-faq .qa__a {
  margin-left: var(--faq-indent);
  padding: 0 0 20px;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--silver);
  max-width: 42em;
  animation: faqFade .32s var(--ease);
}

@keyframes faqFade {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa__a {
    animation: none;
  }
}

.page-faq .qa__a p {
  margin: 0 0 12px;
}

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

.page-faq .qa__a a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(36, 224, 214, .42);
  transition: border-color .24s var(--ease);
}

.page-faq .qa__a a:hover {
  border-bottom-color: var(--cyan);
}

.page-faq .qa__a .copy-btn {
  font-family: var(--mono);
  font-size: 12px;
}

/* ── 步骤列表 ── */
.page-faq .qa-steps {
  list-style: none;
  margin: 16px 0 16px;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-faq .qa-steps li {
  display: grid;
  grid-template-columns: 68px minmax(0, 1fr);
  gap: 10px;
  align-items: start;
  padding: 11px 0;
  border-top: 1px solid var(--line-soft);
  font-size: 15px;
  line-height: 1.78;
  color: var(--silver);
}

.page-faq .qa-steps li:last-child {
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .qa-steps .mono {
  font-size: 11.5px;
  letter-spacing: .08em;
  color: var(--cyan);
  padding-top: 4px;
}

/* ── 分组收尾 ── */
.page-faq .faq-group__foot {
  margin-top: 22px;
  padding-top: 16px;
  border-top: 1px solid var(--line-soft);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 14px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--dust);
}

.page-faq .faq-group__foot .btn {
  font-size: 13px;
}

/* ── 收尾联络带 ── */
.page-faq .faq-help {
  padding: clamp(42px, 6vw, 78px) 0;
  background:
    linear-gradient(118deg, rgba(155, 107, 255, .14) 0%, rgba(36, 224, 214, .07) 52%, transparent 88%),
    var(--ink-900);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-help__inner {
  display: grid;
  gap: 24px;
}

.page-faq .faq-help h2 {
  margin: 12px 0 0;
  font-size: clamp(21px, 3.1vw, 30px);
  line-height: 1.28;
  letter-spacing: -.015em;
  font-weight: 800;
  color: var(--fog);
}

.page-faq .faq-help p {
  margin: 14px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--silver);
  max-width: 46em;
  overflow-wrap: break-word;
}

.page-faq .faq-help .eyebrow {
  margin: 0;
}

.page-faq .faq-help .btn {
  justify-self: start;
}

/* ── 响应式 ── */
@media (max-width: 600px) {
  .page-faq .qa__a {
    margin-left: 0;
    padding-left: 0;
  }

  .page-faq .qa-steps li {
    grid-template-columns: 58px minmax(0, 1fr);
    gap: 8px;
    font-size: 14.5px;
  }

  .page-faq .faq-hero__stats li {
    padding: 13px 10px;
  }
}

@media (min-width: 720px) {
  .page-faq .faq-index__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-faq .faq-group__inner {
    grid-template-columns: minmax(0, 244px) minmax(0, 1fr);
    gap: clamp(34px, 5vw, 72px);
    align-items: start;
  }

  .page-faq .faq-group__head {
    position: sticky;
    top: 128px;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    align-items: end;
    gap: clamp(32px, 4.5vw, 60px);
  }

  .page-faq .faq-help__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 44px;
  }

  .page-faq .faq-help .btn {
    justify-self: end;
  }
}

@media (min-width: 1080px) {
  .page-faq .faq-index__list {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }
}