.page-faq {
  color: var(--ink);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: 26px 0 clamp(36px, 7vw, 80px);
  border-bottom: 2px solid var(--line-2);
  background: linear-gradient(180deg, var(--abyss-800), var(--abyss-900) 72%);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  right: -14%;
  top: -22%;
  width: min(560px, 72vw);
  aspect-ratio: 1 / 1;
  background: conic-gradient(from 210deg at 62% 42%, rgba(47, 243, 214, .18), rgba(123, 92, 255, .13), transparent 66%);
  clip-path: polygon(100% 0, 100% 100%, 0 0);
  pointer-events: none;
}

.page-faq .breadcrumb {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 0 0 24px;
  padding: 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .12em;
  color: var(--ink-mute);
}

.page-faq .breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  margin-right: 8px;
  color: var(--slate-400);
}

.page-faq .breadcrumb__link {
  color: var(--ink-dim);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .16s var(--ease), border-color .16s var(--ease);
}

.page-faq .breadcrumb__link:hover {
  color: var(--cyan);
  border-color: var(--cyan);
}

.page-faq .faq-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 28px;
}

.page-faq .faq-hero h1 {
  margin: 10px 0 0;
  font-size: clamp(32px, 7.4vw, 60px);
  line-height: .96;
  letter-spacing: -.02em;
  font-weight: 900;
}

.page-faq .faq-hero__text {
  margin: 22px 0 0;
  max-width: 34em;
  font-size: 16px;
  line-height: 1.75;
  color: var(--ink-dim);
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-faq .faq-hero__meta {
  border: 2px solid var(--line-2);
  border-left: 4px solid var(--cyan);
  background: var(--abyss-800);
  padding: 18px 18px 12px;
}

.page-faq .faq-meta__label {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--ink-mute);
}

.page-faq .faq-meta__row {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: baseline;
  gap: 6px 12px;
  padding: 11px 0;
  border-top: 1px solid var(--line-1);
}

.page-faq .faq-meta__k {
  font-size: 13px;
  color: var(--ink-dim);
}

.page-faq .faq-meta__v {
  font-family: var(--font-mono);
  font-size: 14.5px;
  color: var(--cyan);
}

/* ---------- 章节头 ---------- */
.page-faq .chapter {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 26px;
}

.page-faq .chapter__title {
  margin: 4px 0 0;
  font-size: clamp(24px, 4.4vw, 38px);
  line-height: 1.08;
  font-weight: 900;
  letter-spacing: -.02em;
}

/* ---------- 主题网格 ---------- */
.page-faq .faq-topics__grid {
  display: grid;
  gap: 22px;
}

.page-faq .topic-grid {
  display: grid;
  gap: 12px;
}

.page-faq .topic {
  position: relative;
  display: block;
  padding: 16px 16px 18px;
  border: 2px solid var(--line-2);
  background: var(--abyss-800);
  color: inherit;
  text-decoration: none;
  transition: transform .18s var(--ease), border-color .18s var(--ease), box-shadow .18s var(--ease), background .18s var(--ease);
}

.page-faq .topic:hover,
.page-faq .topic:focus-visible {
  border-color: var(--cyan);
  background: var(--abyss-700);
  transform: translate(-4px, -4px);
  box-shadow: var(--shadow-hard);
}

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

.page-faq .topic__num {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .14em;
  color: var(--cyan);
}

.page-faq .topic__title {
  margin: 8px 0 6px;
  font-size: 19px;
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--ink);
}

.page-faq .topic__desc {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--ink-dim);
}

/* ---------- 图片容器 ---------- */
.page-faq .faq-fig {
  margin: 0;
  border: 2px solid var(--line-2);
  background: var(--abyss-700);
  box-shadow: var(--shadow-hard);
}

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

.page-faq .faq-fig figcaption {
  padding: 10px 14px;
  border-top: 2px solid var(--line-2);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .1em;
  color: var(--ink-mute);
}

.page-faq .faq-fig--wide {
  margin: 18px 0 6px;
}

/* ---------- 问答主体：左目录 + 右手风琴 ---------- */
.page-faq .faq-shell {
  display: grid;
  gap: 26px;
}

.page-faq .faq-index {
  border: 2px solid var(--line-2);
  background: var(--abyss-800);
  padding: 14px;
}

.page-faq .faq-index__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--ink-mute);
}

.page-faq .faq-index__list {
  list-style: none;
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 4px;
  overflow-x: auto;
}

.page-faq .faq-index__list li {
  flex: 0 0 auto;
}

.page-faq .faq-index__link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border: 2px solid var(--line-1);
  color: var(--ink-dim);
  text-decoration: none;
  font-size: 13.5px;
  white-space: nowrap;
  transition: border-color .16s var(--ease), color .16s var(--ease), background .16s var(--ease);
}

.page-faq .faq-index__link .mono {
  font-size: 11.5px;
  color: var(--slate-400);
  transition: color .16s var(--ease);
}

.page-faq .faq-index__link:hover {
  border-color: var(--cyan);
  color: var(--ink);
  background: var(--abyss-700);
}

.page-faq .faq-index__link:hover .mono {
  color: var(--cyan);
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(32px, 5vw, 54px);
}

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 10px 14px;
  align-items: baseline;
  padding-bottom: 14px;
  border-bottom: 2px solid var(--line-2);
  margin-bottom: 18px;
}

.page-faq .faq-group__num {
  font-size: 12.5px;
  letter-spacing: .1em;
  color: var(--cyan);
}

.page-faq .faq-group__title {
  margin: 0;
  font-size: clamp(21px, 3.6vw, 28px);
  font-weight: 900;
  letter-spacing: -.01em;
  line-height: 1.2;
}

.page-faq .faq-group__desc {
  grid-column: 1 / -1;
  margin: 0;
  max-width: 40em;
  font-size: 14px;
  line-height: 1.72;
  color: var(--ink-dim);
}

.page-faq .faq-group__desc a,
.page-faq .qa__body a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 243, 214, .4);
}

.page-faq .faq-group__desc a:hover,
.page-faq .qa__body a:hover {
  border-color: var(--cyan);
}

/* ---------- 手风琴条目 ---------- */
.page-faq .qa {
  border: 2px solid var(--line-2);
  background: var(--abyss-800);
  margin: 0 0 10px;
  transition: border-color .16s var(--ease), box-shadow .16s var(--ease);
}

.page-faq .qa:hover:not([open]) {
  border-color: var(--cyan);
}

.page-faq .qa[open] {
  border-color: var(--cyan);
  box-shadow: 6px 6px 0 rgba(47, 243, 214, .14);
}

.page-faq .qa summary {
  position: relative;
  cursor: pointer;
  list-style: none;
  padding: 15px 52px 15px 18px;
  font-size: 15.5px;
  font-weight: 700;
  line-height: 1.55;
  color: var(--ink);
}

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

.page-faq .qa summary::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 0;
  background: var(--orange);
  transition: width .16s var(--ease);
}

.page-faq .qa summary:hover::before {
  width: 4px;
}

.page-faq .qa summary::after {
  content: "+";
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1;
  color: var(--cyan);
}

.page-faq .qa[open] summary::after {
  content: "–";
}

.page-faq .qa summary:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: 4px;
}

.page-faq .qa__body {
  padding: 14px 18px 18px;
  border-top: 1px solid var(--line-1);
}

.page-faq .qa__body p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--ink-dim);
}

.page-faq .qa__body p + p {
  margin-top: 10px;
}

.page-faq .faq-group__foot {
  margin: 16px 0 0;
  font-size: 13.5px;
  color: var(--ink-mute);
}

.page-faq .faq-group__foot a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 2px solid rgba(47, 243, 214, .35);
  padding-bottom: 1px;
  margin-left: 4px;
}

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

/* ---------- 自助与人工 ---------- */
.page-faq .faq-help {
  border-top: 2px solid var(--line-2);
  background: linear-gradient(180deg, var(--abyss-800), var(--abyss-900) 65%);
}

.page-faq .faq-help__grid {
  display: grid;
  gap: 16px;
}

.page-faq .help-col {
  border: 2px solid var(--line-2);
  background: var(--abyss-900);
  padding: 20px 18px 22px;
}

.page-faq .help-col--human {
  border-color: rgba(255, 122, 47, .5);
  box-shadow: 8px 8px 0 rgba(255, 122, 47, .14);
}

.page-faq .help-col h3 {
  margin: 10px 0 10px;
  font-size: 20px;
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: -.01em;
}

.page-faq .help-col > p {
  margin: 0 0 12px;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--ink-dim);
}

.page-faq .help-list {
  list-style: none;
  display: grid;
  gap: 9px;
  margin: 0;
  padding: 0;
}

.page-faq .help-list li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  line-height: 1.65;
  color: var(--ink-dim);
}

.page-faq .help-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .6em;
  width: 6px;
  height: 6px;
  background: var(--cyan);
}

.page-faq .help-col--human .help-list li::before {
  background: var(--orange);
}

.page-faq .contact-list {
  list-style: none;
  margin: 0 0 12px;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .contact-list li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 12px;
  padding-top: 10px;
  border-top: 1px solid var(--line-1);
  font-size: 14.5px;
}

.page-faq .contact-list li:first-child {
  padding-top: 0;
  border-top: 0;
}

.page-faq .contact-list .mono {
  min-width: 46px;
  font-size: 11.5px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--ink-mute);
}

.page-faq .contact-list strong {
  font-weight: 600;
  color: var(--ink);
  word-break: break-all;
}

.page-faq .help-col--human .btn {
  margin-top: 6px;
}

.page-faq .faq-links {
  display: grid;
  gap: 10px;
  margin-top: 24px;
  padding-top: 20px;
  border-top: 2px solid var(--line-2);
}

.page-faq .faq-links__item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 12px 14px;
  border: 2px solid var(--line-1);
  color: var(--ink-dim);
  text-decoration: none;
  font-size: 13.5px;
  transition: border-color .16s var(--ease), color .16s var(--ease), transform .16s var(--ease), background .16s var(--ease);
}

.page-faq .faq-links__item .mono {
  color: var(--cyan);
}

.page-faq .faq-links__item:hover {
  border-color: var(--cyan);
  color: var(--ink);
  background: var(--abyss-800);
  transform: translate(-3px, -3px);
}

/* ---------- 断点 ---------- */
@media (min-width: 620px) {
  .page-faq .topic-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .faq-links {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 860px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: 44px;
    align-items: end;
  }

  .page-faq .faq-help__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
  }

  .page-faq .help-col {
    padding: 24px 22px 26px;
  }
}

@media (min-width: 980px) {
  .page-faq .faq-links {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-shell {
    grid-template-columns: 236px minmax(0, 1fr);
    gap: 44px;
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 96px;
    padding: 18px 16px;
  }

  .page-faq .faq-index__list {
    display: block;
    overflow: visible;
    padding: 0;
  }

  .page-faq .faq-index__list li + li {
    margin-top: 2px;
  }

  .page-faq .faq-index__link {
    border: 0;
    border-left: 3px solid var(--line-1);
    padding: 9px 0 9px 12px;
    white-space: normal;
  }

  .page-faq .faq-index__link:hover {
    border-left-color: var(--orange);
    background: transparent;
  }
}

@media (min-width: 1100px) {
  .page-faq .faq-topics__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 380px);
    gap: 34px;
    align-items: start;
  }

  .page-faq .qa summary {
    font-size: 16px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .topic,
  .page-faq .faq-links__item,
  .page-faq .qa,
  .page-faq .qa summary::before,
  .page-faq .faq-index__link {
    transition: none;
  }

  .page-faq .topic:hover,
  .page-faq .topic:focus-visible,
  .page-faq .faq-links__item:hover {
    transform: none;
  }
}
<<<END>>>