.page-faq {
  --faq-line: rgba(27, 51, 88, .58);
  --faq-line-soft: rgba(27, 51, 88, .34);
  background: var(--ink-900);
  color: var(--paper);
}

.page-faq *,
.page-faq *::before,
.page-faq *::after {
  box-sizing: border-box;
}

.page-faq .section {
  position: relative;
  padding: clamp(2.4rem, 6vw, 4.2rem) 0;
}

.page-faq .section__head {
  display: flex;
  align-items: baseline;
  gap: .85rem;
  flex-wrap: wrap;
}

.page-faq .section__idx {
  font-family: var(--font-mono);
  font-size: .8rem;
  letter-spacing: .14em;
  color: var(--gold);
}

.page-faq .section__title {
  margin: 0;
  font-family: var(--font-head);
  font-size: clamp(1.25rem, 3vw, 1.7rem);
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--paper);
}

/* ---------- hero ---------- */

.page-faq .kb-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(2.2rem, 6vw, 4.4rem) 0 clamp(1.8rem, 5vw, 3.2rem);
  background:
    radial-gradient(115% 88% at 100% 0%, rgba(255, 106, 69, .17), transparent 56%),
    linear-gradient(178deg, var(--ink-900) 12%, var(--ink-800) 100%);
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .kb-hero__slash {
  position: absolute;
  top: -28%;
  right: -14%;
  width: min(62vw, 780px);
  height: 168%;
  background: linear-gradient(142deg, rgba(227, 182, 102, .18), rgba(227, 182, 102, 0) 62%);
  transform: skewX(-15deg);
  pointer-events: none;
}

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

.page-faq .crumbs {
  display: flex;
  align-items: center;
  gap: .5rem;
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .06em;
  color: var(--paper-faint);
}

.page-faq .crumbs__item {
  color: var(--paper-faint);
  text-decoration: none;
}

.page-faq .crumbs__item:hover {
  color: var(--gold-lite);
}

.page-faq .crumbs__sep {
  color: var(--rail);
}

.page-faq .page-head__kicker {
  margin: 1.6rem 0 0;
  font-family: var(--font-mono);
  font-size: .76rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--gold);
}

.page-faq .page-head__title {
  margin: .7rem 0 0;
  max-width: 22ch;
  font-family: var(--font-head);
  font-size: clamp(1.85rem, 5.2vw, 3.05rem);
  font-weight: 700;
  line-height: 1.16;
  letter-spacing: -.02em;
  color: var(--paper);
}

.page-faq .page-head__lead {
  margin: 1.15rem 0 0;
  max-width: 46ch;
  font-size: 1rem;
  line-height: 1.9;
  color: var(--paper-dim);
}

.page-faq .kb-hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 1.1rem 2.6rem;
  margin: 1.9rem 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .kb-hero__stats li {
  display: flex;
  align-items: baseline;
  gap: .45rem;
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .05em;
  color: var(--paper-faint);
}

.page-faq .kb-hero__stats b {
  font-family: var(--font-head);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--gold);
}

/* ---------- 分类归档 ---------- */

.page-faq .kb-cats__grid {
  display: grid;
  gap: 2.2rem;
  margin-top: 1.8rem;
}

.page-faq .kb-cats__list {
  position: relative;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .kb-cats__list::before {
  content: "";
  position: absolute;
  left: 19px;
  top: 14px;
  bottom: 16px;
  width: 1px;
  background: linear-gradient(180deg, var(--gold) 0%, var(--faq-line) 68%, transparent 100%);
}

.page-faq .kb-cat {
  position: relative;
  padding: 0 0 1.7rem 3.7rem;
}

.page-faq .kb-cat:last-child {
  padding-bottom: 0;
}

.page-faq .kb-cat__no {
  position: absolute;
  left: 0;
  top: 0;
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  border: 1px solid var(--faq-line);
  border-radius: 50%;
  background: var(--ink-900);
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .04em;
  color: var(--gold);
}

.page-faq .kb-cat__name {
  display: block;
  font-family: var(--font-head);
  font-size: 1.06rem;
  font-weight: 700;
  letter-spacing: .01em;
  color: var(--paper);
}

.page-faq .kb-cat__meta {
  display: block;
  margin-top: .3rem;
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .07em;
  color: var(--paper-faint);
}

.page-faq .kb-cat__desc {
  margin: .55rem 0 0;
  max-width: 40ch;
  font-size: .93rem;
  line-height: 1.85;
  color: var(--paper-dim);
}

.page-faq .kb-cat__go {
  display: inline-block;
  margin-top: .6rem;
  padding-bottom: 2px;
  font-family: var(--font-mono);
  font-size: .76rem;
  letter-spacing: .05em;
  color: var(--gold-lite);
  text-decoration: none;
  border-bottom: 1px solid rgba(227, 182, 102, .38);
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.page-faq .kb-cat__go:hover {
  color: var(--coral);
  border-bottom-color: var(--coral);
}

.page-faq .kb-cats__figure {
  margin: 0;
  border: 1px solid var(--faq-line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--panel);
}

.page-faq .kb-cats__figure .figure__media,
.page-faq .kb-flows__figure .figure__media {
  aspect-ratio: auto;
  background: linear-gradient(158deg, rgba(16, 32, 63, .9), rgba(8, 18, 42, .98));
}

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

.page-faq .kb-cats__figure .figure__cap,
.page-faq .kb-flows__figure .figure__cap {
  padding: .8rem 1rem;
  border-top: 1px solid var(--faq-line-soft);
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .05em;
  color: var(--paper-faint);
}

/* ---------- 三条高频操作 ---------- */

.page-faq .kb-flows__grid {
  display: grid;
  gap: 2rem;
  margin-top: 1.8rem;
}

.page-faq .kb-flows__figure {
  margin: 0;
  border: 1px solid var(--faq-line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--panel);
}

.page-faq .kb-flows__items {
  display: grid;
  gap: 1.15rem;
}

.page-faq .kb-flow {
  position: relative;
  padding: 1.25rem 1.3rem 1.35rem;
  border: 1px solid var(--faq-line);
  border-left: 3px solid var(--jade);
  border-radius: 0 var(--radius) var(--radius) 0;
  background: var(--panel);
}

.page-faq .kb-flow--b {
  border-left-color: var(--violet);
}

.page-faq .kb-flow--c {
  border-left-color: var(--copper);
}

.page-faq .kb-flow__no {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .14em;
  color: var(--gold);
}

.page-faq .kb-flow__title {
  margin: .25rem 0 0;
  font-family: var(--font-head);
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: .01em;
  color: var(--paper);
}

.page-faq .kb-flow__steps {
  margin: .85rem 0 0;
  padding: 0;
  list-style: none;
  counter-reset: kf;
  display: grid;
  gap: .55rem;
}

.page-faq .kb-flow__steps li {
  position: relative;
  padding-left: 2.05rem;
  font-size: .92rem;
  line-height: 1.78;
  color: var(--paper-dim);
  counter-increment: kf;
}

.page-faq .kb-flow__steps li::before {
  content: counter(kf);
  position: absolute;
  left: 0;
  top: .18rem;
  width: 1.35rem;
  height: 1.35rem;
  display: grid;
  place-items: center;
  border: 1px solid rgba(227, 182, 102, .45);
  border-radius: 50%;
  font-family: var(--font-mono);
  font-size: .68rem;
  color: var(--gold);
}

/* ---------- 详细解答 ---------- */

.page-faq .kb-answers__grid {
  display: grid;
  gap: 2rem;
  margin-top: 1.8rem;
}

.page-faq .kb-index {
  display: flex;
  overflow-x: auto;
  gap: .5rem;
  padding-top: .8rem;
  border-top: 1px solid var(--faq-line);
  scrollbar-width: thin;
}

.page-faq .kb-index__item {
  flex: 0 0 auto;
  display: flex;
  align-items: baseline;
  gap: .5rem;
  padding: .5rem .15rem;
  border-bottom: 2px solid transparent;
  font-size: .88rem;
  text-decoration: none;
  color: var(--paper-dim);
  white-space: nowrap;
  transition: color .2s var(--ease), border-color .2s var(--ease), background .2s var(--ease);
}

.page-faq .kb-index__item:hover {
  color: var(--gold-lite);
  border-bottom-color: var(--gold);
}

.page-faq .kb-index__no {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .08em;
  color: var(--gold);
}

.page-faq .kb-index__count {
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .05em;
  color: var(--paper-faint);
}

.page-faq .kb-groups {
  display: grid;
  gap: 2.2rem;
}

.page-faq .kb-group {
  scroll-margin-top: 5.5rem;
}

.page-faq .kb-group__title {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: .6rem;
  margin: 0 0 .9rem;
  font-family: var(--font-head);
  font-size: 1rem;
  font-weight: 700;
  color: var(--paper);
}

.page-faq .kb-group__tag {
  display: inline-block;
  padding: .2rem .62rem;
  border: 1px solid currentColor;
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: .7rem;
  font-weight: 500;
  letter-spacing: .06em;
}

.page-faq .kb-group--a .kb-group__tag {
  color: var(--jade);
}

.page-faq .kb-group--b .kb-group__tag {
  color: var(--violet);
}

.page-faq .kb-group--c .kb-group__tag {
  color: var(--copper);
}

.page-faq .kb-group--d .kb-group__tag {
  color: var(--gold);
}

.page-faq .kb-q {
  border: 1px solid var(--faq-line);
  border-radius: var(--radius);
  background: rgba(16, 32, 63, .52);
  overflow: hidden;
}

.page-faq .kb-q + .kb-q {
  margin-top: .6rem;
}

.page-faq .kb-q .disclosure__summary {
  display: flex;
  align-items: flex-start;
  gap: .8rem;
  padding: .95rem 1.1rem;
  list-style: none;
  cursor: pointer;
  font-size: .95rem;
  line-height: 1.7;
  color: var(--paper);
  transition: background .2s var(--ease), color .2s var(--ease);
}

.page-faq .kb-q .disclosure__summary::-webkit-details-marker {
  display: none;
}

.page-faq .kb-q .disclosure__summary::after {
  content: "+";
  margin-left: auto;
  padding-left: .6rem;
  font-family: var(--font-mono);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--gold);
  transition: color .22s var(--ease);
}

.page-faq .kb-q[open] .disclosure__summary::after {
  content: "−";
  color: var(--coral);
}

.page-faq .kb-q .disclosure__summary:hover {
  background: rgba(27, 51, 88, .45);
}

.page-faq .kb-q__no {
  flex: 0 0 auto;
  padding-top: .16rem;
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .06em;
  color: var(--gold);
  transition: color .22s var(--ease);
}

.page-faq .kb-q[open] .kb-q__no {
  color: var(--coral);
}

.page-faq .kb-q__text {
  flex: 1 1 auto;
}

.page-faq .kb-q .disclosure__body {
  padding: 0 1.1rem 1.1rem 2.55rem;
  font-size: .91rem;
  line-height: 1.9;
  color: var(--paper-dim);
}

.page-faq .kb-q .disclosure__body p {
  margin: 0;
  max-width: 42ch;
}

/* ---------- 提交反馈 ---------- */

.page-faq .kb-submit__prose {
  margin-top: 1.4rem;
}

.page-faq .kb-submit__prose > p {
  max-width: 42ch;
  margin: 0 0 1.1rem;
  font-size: .97rem;
  line-height: 1.9;
  color: var(--paper-dim);
}

.page-faq .kb-submit__list {
  margin: 0 0 1.2rem;
  padding: 0;
  list-style: none;
  display: grid;
  gap: .7rem;
  counter-reset: ks;
}

.page-faq .kb-submit__list li {
  position: relative;
  padding: .85rem 1rem .85rem 3rem;
  max-width: 46ch;
  border: 1px solid var(--faq-line);
  border-radius: var(--radius);
  background: rgba(16, 32, 63, .5);
  font-size: .92rem;
  line-height: 1.82;
  color: var(--paper-dim);
  counter-increment: ks;
}

.page-faq .kb-submit__list li::before {
  content: counter(ks, decimal-leading-zero);
  position: absolute;
  left: 1rem;
  top: .95rem;
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .06em;
  color: var(--gold);
}

.page-faq .kb-submit__list b {
  color: var(--paper);
  font-weight: 700;
}

/* ---------- 兜底路径 ---------- */

.page-faq .kb-more__panel {
  display: grid;
  gap: 1.4rem;
  padding: clamp(1.5rem, 4vw, 2.6rem);
  border: 1px solid var(--faq-line);
  border-radius: var(--radius);
  background:
    radial-gradient(120% 140% at 8% 0%, rgba(255, 106, 69, .13), transparent 58%),
    var(--panel);
}

.page-faq .kb-more__title {
  margin: .45rem 0 0;
  font-family: var(--font-head);
  font-size: clamp(1.2rem, 3vw, 1.6rem);
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--paper);
}

.page-faq .kb-more__body p {
  margin: 0;
  max-width: 44ch;
  font-size: .95rem;
  line-height: 1.9;
  color: var(--paper-dim);
}

.page-faq .kb-more__aside {
  margin-top: .9rem !important;
  font-size: .88rem !important;
  color: var(--paper-faint) !important;
}

.page-faq .kb-more__aside a {
  color: var(--gold-lite);
  text-decoration: none;
  border-bottom: 1px solid rgba(227, 182, 102, .38);
}

.page-faq .kb-more__aside a:hover {
  color: var(--coral);
  border-bottom-color: var(--coral);
}

.page-faq .kb-more__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .8rem;
  margin-top: 1.4rem;
}

.page-faq .kb-more__actions .btn {
  text-decoration: none;
}

/* ---------- 桌面端 ---------- */

@media (min-width: 900px) {
  .page-faq .kb-cats__grid {
    grid-template-columns: minmax(0, 1.32fr) minmax(0, 1fr);
    gap: 3.4rem;
    align-items: start;
  }

  .page-faq .kb-cats__figure {
    margin-top: 1.2rem;
  }

  .page-faq .kb-answers__grid {
    grid-template-columns: 190px minmax(0, 1fr);
    gap: 3rem;
    align-items: start;
  }

  .page-faq .kb-index {
    display: grid;
    gap: .25rem;
    overflow: visible;
    padding-top: 0;
    border-top: 0;
    border-left: 1px solid var(--faq-line);
    position: sticky;
    top: 5.5rem;
  }

  .page-faq .kb-index__item {
    padding: .55rem .7rem .55rem 1rem;
    margin-left: -1px;
    border-bottom: 0;
    border-left: 2px solid transparent;
    white-space: normal;
  }

  .page-faq .kb-index__item:hover {
    border-bottom-color: transparent;
    border-left-color: var(--gold);
    background: rgba(27, 51, 88, .38);
  }

  .page-faq .kb-index__name {
    flex: 1 1 auto;
  }

  .page-faq .kb-index__count {
    margin-left: auto;
  }

  .page-faq .kb-more__panel {
    grid-template-columns: minmax(0, .85fr) minmax(0, 1.5fr);
    gap: 2.6rem;
    align-items: start;
  }
}

@media (min-width: 960px) {
  .page-faq .kb-flows__grid {
    grid-template-columns: minmax(0, 320px) minmax(0, 1fr);
    gap: 3.4rem;
    align-items: start;
  }
}

@media (max-width: 899px) {
  .page-faq .kb-index__count {
    margin-left: .3rem;
  }

  .page-faq .kb-cats__list::before {
    bottom: 24px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq * {
    transition-duration: .01ms !important;
  }
}
<<<END>>>