.page-faq {
  --faq-rail-w: 232px;
  --faq-sticky: 104px;
}

/* ============ 首屏 ============ */
.page-faq .faq-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 50%;
  top: -34%;
  width: min(920px, 130vw);
  height: 600px;
  transform: translateX(-50%);
  background:
    radial-gradient(closest-side, rgba(108, 43, 217, .42), rgba(34, 230, 230, .07) 58%, transparent 74%);
  pointer-events: none;
  z-index: -1;
}

.page-faq .faq-hero h1 {
  margin: 14px 0 18px;
  max-width: 21ch;
}

.page-faq .faq-hero__lead {
  max-width: 66ch;
}

.page-faq .faq-hero__tags {
  margin-top: 22px;
}

/* ============ 四步路径 ============ */
.page-faq .faq-steps .section-head {
  margin-bottom: clamp(22px, 3.5vw, 34px);
}

.page-faq .faq-steps__figure {
  margin: 0 0 clamp(24px, 4vw, 42px);
}

.page-faq .step-track {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-faq .step-node {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 22px 20px 20px;
  background: var(--fg-void);
  border: 3px solid var(--fg-line);
  transition: border-color .25s ease, transform .25s ease;
}

.page-faq .step-node:hover {
  border-color: var(--fg-violet);
  transform: translateY(-3px);
}

.page-faq .step-node__idx {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  flex: 0 0 auto;
  border: 2px solid var(--fg-cyan);
  background: var(--fg-void);
  color: var(--fg-cyan);
  font-size: 14px;
  letter-spacing: .1em;
}

.page-faq .step-node__title {
  margin: 0;
  font-size: 1.15rem;
  font-weight: 800;
  line-height: 1.4;
  color: var(--fg-ice);
}

.page-faq .step-node__desc {
  margin: 0;
  font-size: .95rem;
  line-height: 1.78;
  color: var(--fg-mist);
}

.page-faq .step-node__flag {
  margin: 0;
  padding: 9px 11px;
  border-left: 3px solid var(--fg-cyan);
  background: var(--fg-cyan-soft);
  color: var(--fg-ice);
  font-size: 12px;
  line-height: 1.65;
}

.page-faq .step-node__link {
  margin-top: auto;
  align-self: flex-start;
  padding-bottom: 2px;
  color: var(--fg-cyan);
  font-size: .875rem;
  font-weight: 700;
  text-decoration: none;
  border-bottom: 1px dashed rgba(34, 230, 230, .55);
  transition: color .2s ease, border-color .2s ease;
}

.page-faq .step-node__link:hover,
.page-faq .step-node__link:focus-visible {
  color: var(--fg-ember);
  border-bottom-color: var(--fg-ember);
}

@media (min-width: 700px) {
  .page-faq .step-track {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
  }
}

@media (min-width: 1060px) {
  .page-faq .step-track {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 22px;
  }

  .page-faq .step-node::after {
    content: "";
    position: absolute;
    top: 42px;
    right: -22px;
    width: 22px;
    height: 2px;
    background: repeating-linear-gradient(90deg, var(--fg-cyan) 0 5px, transparent 5px 11px);
    opacity: .6;
  }

  .page-faq .step-node:last-child::after {
    display: none;
  }
}

/* ============ 问答区 ============ */
.page-faq .faq-qa .section-head {
  margin-bottom: clamp(20px, 3vw, 30px);
}

.page-faq .faq-tools {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding-bottom: 18px;
  margin-bottom: clamp(22px, 3.5vw, 34px);
  border-bottom: 1px solid var(--fg-line);
}

.page-faq .faq-tools__label {
  margin-right: 4px;
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--fg-mist);
}

.page-faq .faq-tools .chip {
  cursor: pointer;
}

.page-faq .faq-tools .chip[aria-pressed="true"] {
  background: var(--fg-cyan);
  border-color: var(--fg-cyan);
  color: var(--fg-void);
  font-weight: 700;
}

.page-faq .faq-cols {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 3vw, 46px);
}

@media (min-width: 960px) {
  .page-faq .faq-cols {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
  }
}

/* ---- 左侧编号索引 ---- */
.page-faq .faq-rail {
  display: none;
}

@media (min-width: 960px) {
  .page-faq .faq-rail {
    display: block;
    position: sticky;
    top: var(--faq-sticky);
    align-self: start;
    padding-left: 18px;
    border-left: 2px solid var(--fg-cyan);
  }
}

.page-faq .faq-rail__title {
  margin: 0 0 16px;
  font-size: 12px;
  letter-spacing: .24em;
  color: var(--fg-cyan);
}

.page-faq .faq-rail__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-faq .faq-rail__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 8px 0;
  color: var(--fg-mist);
  font-size: .92rem;
  line-height: 1.5;
  text-decoration: none;
  transition: color .2s ease, transform .2s ease;
}

.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible {
  color: var(--fg-ice);
  transform: translateX(4px);
}

.page-faq .faq-rail__code {
  flex: 0 0 auto;
  color: var(--fg-pink);
  font-size: 12px;
  letter-spacing: .12em;
}

/* ---- 问题分组 ---- */
.page-faq .qa-stream {
  min-width: 0;
}

.page-faq .qa-group {
  margin-bottom: clamp(30px, 4vw, 52px);
  scroll-margin-top: var(--faq-sticky);
}

.page-faq .qa-group:last-child {
  margin-bottom: 0;
}

.page-faq .qa-group__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin: 0 0 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--fg-line);
}

.page-faq .qa-group__code {
  color: var(--fg-pink);
  font-size: 13px;
  letter-spacing: .18em;
}

.page-faq .qa-group__title {
  margin: 0;
  font-size: clamp(1.15rem, 2.2vw, 1.45rem);
  font-weight: 800;
  line-height: 1.35;
  color: var(--fg-ice);
}

/* ---- 折叠条目 ---- */
.page-faq .qa {
  position: relative;
  margin-bottom: 10px;
  background: var(--fg-night);
  border: 3px solid var(--fg-line);
  transition: border-color .2s ease, box-shadow .2s ease, margin-bottom .2s ease;
}

.page-faq .qa::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 0;
  background: var(--fg-pink);
  pointer-events: none;
  transition: width .22s ease;
}

.page-faq .qa:hover {
  border-color: rgba(168, 85, 247, .55);
}

.page-faq .qa[open] {
  margin-bottom: 16px;
  border-color: var(--fg-violet);
  box-shadow: var(--fg-shadow-hard);
}

.page-faq .qa[open]::before {
  width: 5px;
}

.page-faq .qa__summary {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 17px 18px;
  cursor: pointer;
  list-style: none;
  transition: transform .2s ease;
}

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

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

.page-faq .qa[open] .qa__summary {
  transform: translateX(4px);
}

.page-faq .qa__idx {
  flex: 0 0 auto;
  padding-top: 2px;
  color: var(--fg-cyan);
  font-size: 15px;
  letter-spacing: .1em;
  transition: color .2s ease;
}

.page-faq .qa[open] .qa__idx {
  color: var(--fg-pink);
}

.page-faq .qa__q {
  flex: 1 1 auto;
  min-width: 0;
  font-size: 1.0625rem;
  font-weight: 700;
  line-height: 1.58;
  color: var(--fg-ice);
}

.page-faq .qa__marker {
  flex: 0 0 auto;
  color: var(--fg-mist);
  font-size: 1.15rem;
  line-height: 1.35;
  transition: color .2s ease, transform .22s ease;
}

.page-faq .qa[open] .qa__marker {
  color: var(--fg-pink);
  transform: rotate(45deg);
}

.page-faq .qa__body {
  padding: 4px 20px 20px 58px;
}

.page-faq .qa__body p {
  margin: 0 0 .75em;
  font-size: .97rem;
  line-height: 1.82;
  color: var(--fg-mist);
}

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

.page-faq .qa__body strong {
  color: var(--fg-ice);
  font-weight: 700;
}

.page-faq .qa__tip {
  margin-top: .9em;
  padding: 10px 13px;
  border: 2px solid var(--fg-cyan);
  border-left-width: 5px;
  background: var(--fg-cyan-soft);
  color: var(--fg-ice);
  font-size: .9rem;
  line-height: 1.72;
}

.page-faq .faq-net__figure {
  margin: 0 0 22px;
}

/* ============ 转人工 ============ */
.page-faq .help-panel {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 3vw, 30px);
  padding: clamp(22px, 4vw, 42px);
  background: var(--fg-night);
  border: 3px solid var(--fg-violet);
  box-shadow: var(--fg-shadow-hard);
}

.page-faq .help-panel__head h2 {
  margin: 10px 0 14px;
  max-width: 22ch;
}

.page-faq .help-panel__desc {
  margin: 0 0 14px;
  max-width: 48ch;
  font-size: .97rem;
  line-height: 1.8;
  color: var(--fg-mist);
}

.page-faq .help-contact {
  margin: 0;
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--fg-cyan);
  word-break: break-word;
}

.page-faq .help-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
  align-content: start;
}

.page-faq .help-list li {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 11px 13px;
  background: rgba(5, 4, 10, .55);
  border: 1px solid var(--fg-line);
  font-size: .95rem;
  line-height: 1.7;
  color: var(--fg-mist);
}

.page-faq .help-list__code {
  flex: 0 0 auto;
  color: var(--fg-cyan);
  font-size: 12px;
  letter-spacing: .12em;
}

.page-faq .help-panel__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  padding-top: 20px;
  border-top: 1px solid var(--fg-line);
}

@media (min-width: 900px) {
  .page-faq .help-panel {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  }

  .page-faq .help-panel__head {
    grid-column: 1;
  }

  .page-faq .help-list {
    grid-column: 2;
    grid-row: 1 / span 2;
  }

  .page-faq .help-panel__actions {
    grid-column: 1 / -1;
  }
}

@media (max-width: 560px) {
  .page-faq .qa__summary {
    gap: 10px;
    padding: 15px 14px;
  }

  .page-faq .qa__body {
    padding: 2px 14px 18px 14px;
  }

  .page-faq .step-node {
    padding: 18px 16px 16px;
  }

  .page-faq .help-panel {
    padding: 20px 16px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .step-node,
  .page-faq .qa,
  .page-faq .qa__summary,
  .page-faq .qa__marker,
  .page-faq .qa__idx,
  .page-faq .qa::before,
  .page-faq .faq-rail__link {
    transition: none;
  }
}
<<<END>>>