.page-faq {
  --faq-rule: 1px solid var(--grid-600);
  --faq-cyan-wash: rgba(53, 240, 208, 0.06);
  --faq-cyan-line: rgba(53, 240, 208, 0.28);
  background: var(--ink-900);
  color: var(--paper-100);
  padding-bottom: clamp(48px, 7vw, 96px);
}

.page-faq a {
  color: var(--signal-cyan);
}

.page-faq a:focus-visible,
.page-faq summary:focus-visible {
  outline: 2px solid var(--focus-violet);
  outline-offset: 3px;
}

.page-faq .breadcrumb {
  padding-block: 18px 0;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.06em;
  color: var(--slate-500);
}

.page-faq .breadcrumb a {
  color: var(--slate-500);
  text-decoration: none;
}

.page-faq .breadcrumb a:hover {
  color: var(--signal-cyan);
}

.page-faq .breadcrumb__sep {
  padding-inline: 8px;
  color: var(--grid-600);
}

/* ---------- 首屏 ---------- */

.page-faq .faq-mast {
  padding-block: clamp(28px, 4vw, 52px) clamp(24px, 3.4vw, 40px);
  border-bottom: var(--faq-rule);
}

.page-faq .faq-mast .eyebrow {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--signal-cyan);
  margin: 0 0 14px;
}

.page-faq .faq-mast h1 {
  margin: 0;
  max-width: 20ch;
  font-family: var(--font-display);
  font-stretch: condensed;
  font-weight: 800;
  font-size: var(--fs-56);
  line-height: 1.02;
  letter-spacing: -0.02em;
  color: var(--paper-100);
}

.page-faq .faq-mast__lede {
  margin: 20px 0 0;
  max-width: 62ch;
  font-size: var(--fs-18);
  line-height: 1.65;
  color: var(--paper-100);
}

.page-faq .faq-mast__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
}

.page-faq .faq-mast__tags .tag {
  display: inline-block;
  padding: 5px 10px;
  border: 1px solid var(--grid-600);
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.06em;
  color: var(--slate-500);
}

/* ---------- 主体分栏 ---------- */

.page-faq .faq-shell {
  display: grid;
  gap: 28px;
  padding-top: clamp(28px, 4vw, 48px);
}

.page-faq .faq-index__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--sand-400);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: var(--faq-rule);
}

.page-faq .faq-index__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 12px 10px 12px 12px;
  border-bottom: var(--faq-rule);
  border-left: 2px solid transparent;
  font-size: var(--fs-16);
  color: var(--paper-100);
  text-decoration: none;
  transition: background 200ms var(--ease), border-color 200ms var(--ease), color 200ms var(--ease);
}

.page-faq .faq-index__num {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  color: var(--slate-500);
}

.page-faq .faq-index__link:hover {
  background: var(--faq-cyan-wash);
  border-left-color: var(--faq-cyan-line);
}

.page-faq .faq-index__link.is-current {
  background: var(--faq-cyan-wash);
  border-left-color: var(--signal-cyan);
}

.page-faq .faq-index__link.is-current .faq-index__num {
  color: var(--signal-cyan);
}

.page-faq .faq-index__note {
  margin: 16px 0 0;
  font-size: var(--fs-13);
  line-height: 1.6;
  color: var(--slate-500);
}

.page-faq .faq-index__cta {
  margin-top: 16px;
  width: 100%;
  justify-content: center;
  text-align: center;
}

/* ---------- 问答分组 ---------- */

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

.page-faq .faq-group {
  padding-bottom: clamp(32px, 4.5vw, 56px);
  margin-bottom: clamp(20px, 3vw, 32px);
  scroll-margin-top: 24px;
}

.page-faq .faq-group + .faq-group {
  border-top: var(--faq-rule);
  padding-top: clamp(28px, 4vw, 44px);
}

.page-faq .section-head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 12px;
}

.page-faq .section-head__num {
  font-family: var(--font-mono);
  font-size: var(--fs-22);
  color: var(--signal-cyan);
  letter-spacing: -0.02em;
}

.page-faq .section-head__title {
  margin: 0;
  font-family: var(--font-display);
  font-stretch: condensed;
  font-weight: 800;
  font-size: var(--fs-28);
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--paper-100);
}

.page-faq .faq-group__intro {
  margin: 0 0 20px;
  max-width: 60ch;
  font-size: var(--fs-16);
  line-height: 1.65;
  color: var(--slate-500);
}

/* ---------- 折叠问答 ---------- */

.page-faq .qa {
  border-top: var(--faq-rule);
  background: transparent;
  transition: background 200ms var(--ease);
}

.page-faq .qa:last-of-type {
  border-bottom: var(--faq-rule);
}

.page-faq .qa__q {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 16px 4px;
  cursor: pointer;
  list-style: none;
  transition: background 200ms var(--ease), padding-left 200ms var(--ease);
}

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

.page-faq .qa__q:hover {
  background: var(--faq-cyan-wash);
  padding-left: 10px;
}

.page-faq .qa__num {
  flex: none;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.04em;
  color: var(--sand-400);
}

.page-faq .qa__text {
  flex: 1 1 auto;
  font-size: var(--fs-16);
  font-weight: 600;
  line-height: 1.5;
  color: var(--paper-100);
}

.page-faq .qa__sign {
  position: relative;
  flex: none;
  width: 16px;
  height: 16px;
  align-self: center;
}

.page-faq .qa__sign::before,
.page-faq .qa__sign::after {
  content: "";
  position: absolute;
  background: var(--signal-cyan);
  transition: transform 200ms var(--ease), opacity 200ms var(--ease);
}

.page-faq .qa__sign::before {
  left: 0;
  right: 0;
  top: calc(50% - 1px);
  height: 2px;
}

.page-faq .qa__sign::after {
  top: 0;
  bottom: 0;
  left: calc(50% - 1px);
  width: 2px;
}

.page-faq .qa[open] .qa__sign::after {
  transform: scaleY(0);
  opacity: 0;
}

.page-faq .qa[open] .qa__q {
  background: var(--faq-cyan-wash);
  padding-left: 10px;
}

.page-faq .qa__a {
  padding: 4px 4px 20px 10px;
  border-left: 2px solid var(--teal-700);
  margin-left: 4px;
}

.page-faq .qa__lead {
  margin: 0;
  font-size: var(--fs-16);
  line-height: 1.65;
  color: var(--paper-100);
  font-weight: 600;
}

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

.page-faq .qa__a p + p,
.page-faq .qa__a p + ol,
.page-faq .qa__a ol + p {
  margin-top: 12px;
}

.page-faq .qa__steps {
  counter-reset: faqstep;
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
}

.page-faq .qa__steps li {
  counter-increment: faqstep;
  display: grid;
  grid-template-columns: 2.2em minmax(0, 1fr);
  gap: 4px;
  padding: 9px 0;
  border-bottom: 1px dotted var(--grid-600);
  font-size: var(--fs-16);
  line-height: 1.6;
  color: var(--paper-100);
}

.page-faq .qa__steps li::before {
  content: counter(faqstep, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: var(--fs-13);
  color: var(--signal-cyan);
  padding-top: 3px;
}

.page-faq .qa__rel {
  margin-top: 14px !important;
  font-size: var(--fs-13);
  letter-spacing: 0.02em;
  color: var(--slate-500);
}

.page-faq .qa__rel a {
  color: var(--signal-cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 图文分栏 ---------- */

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

.page-faq .faq-figure {
  margin: 0;
}

.page-faq .media-frame {
  position: relative;
  margin: 0;
  border: var(--faq-rule);
  overflow: hidden;
  aspect-ratio: 3 / 2;
}

.page-faq .media-frame--wide {
  aspect-ratio: 16 / 9;
}

.page-faq .media-frame img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
  filter: saturate(0.82) contrast(1.04);
}

.page-faq .media-frame__caption {
  position: absolute;
  left: 0;
  bottom: 0;
  max-width: 100%;
  padding: 6px 10px;
  background: rgba(10, 18, 16, 0.82);
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.04em;
  color: var(--sand-400);
}

/* ---------- 转人工区块 ---------- */

.page-faq .faq-group--help {
  border-top: 2px solid var(--signal-cyan);
  padding-top: clamp(24px, 3.4vw, 36px);
}

.page-faq .faq-help {
  display: grid;
  gap: 28px;
  background: var(--charcoal-800);
  border: var(--faq-rule);
  padding: clamp(20px, 3.6vw, 40px);
}

.page-faq .faq-help .eyebrow {
  display: block;
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--signal-orange);
}

.page-faq .faq-help__title {
  margin: 0;
  font-family: var(--font-display);
  font-stretch: condensed;
  font-weight: 800;
  font-size: var(--fs-28);
  line-height: 1.12;
  letter-spacing: -0.01em;
  color: var(--paper-100);
}

.page-faq .faq-help__lede {
  margin: 14px 0 0;
  max-width: 58ch;
  font-size: var(--fs-16);
  line-height: 1.7;
  color: var(--paper-100);
}

.page-faq .faq-help__contacts {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  border-top: var(--faq-rule);
}

.page-faq .faq-help__contact {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 16px;
  align-items: baseline;
  padding: 11px 0;
  border-bottom: var(--faq-rule);
}

.page-faq .faq-help__key {
  min-width: 6em;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.12em;
  color: var(--sand-400);
}

.page-faq .faq-help__val {
  font-family: var(--font-mono);
  font-size: var(--fs-16);
  color: var(--paper-100);
  word-break: break-word;
}

.page-faq .faq-help__before {
  margin: 22px 0 10px;
  font-size: var(--fs-13);
  letter-spacing: 0.04em;
  color: var(--slate-500);
}

.page-faq .faq-help__checklist {
  list-style: none;
  margin: 0 0 24px;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-faq .faq-help__checklist li {
  display: grid;
  grid-template-columns: 16px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  font-size: var(--fs-16);
  line-height: 1.55;
  color: var(--paper-100);
}

.page-faq .faq-help__checklist li::before {
  content: "";
  width: 14px;
  height: 14px;
  margin-top: 4px;
  border: 1px solid var(--signal-cyan);
}

.page-faq .faq-help__figure {
  margin: 0;
}

.page-faq .faq-help .btn--signal {
  display: inline-block;
  text-decoration: none;
}

/* ---------- 响应式 ---------- */

@media (min-width: 760px) {
  .page-faq .faq-help {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
    align-items: start;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-shell {
    grid-template-columns: 232px minmax(0, 1fr);
    gap: 56px;
    padding-top: clamp(36px, 5vw, 56px);
  }

  .page-faq .faq-index {
    position: sticky;
    top: 24px;
    align-self: start;
  }

  .page-faq .faq-mast h1 {
    max-width: 24ch;
  }

  .page-faq .qa__q {
    padding: 18px 6px;
  }

  .page-faq .qa__a {
    padding-left: 22px;
  }
}

@media (min-width: 1080px) {
  .page-faq .faq-group__cols {
    grid-template-columns: minmax(0, 1fr) 300px;
    gap: 32px;
    align-items: start;
  }

  .page-faq .faq-figure {
    position: sticky;
    top: 24px;
  }
}

@media (max-width: 899px) {
  .page-faq .faq-index__list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(148px, 1fr));
    border-top: none;
  }

  .page-faq .faq-index__link {
    border-top: var(--faq-rule);
    font-size: var(--fs-13);
    padding: 10px 8px;
  }

  .page-faq .faq-index__note,
  .page-faq .faq-index__cta {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa__sign::before,
  .page-faq .qa__sign::after,
  .page-faq .qa__q,
  .page-faq .faq-index__link {
    transition: none;
  }
}
<<<END>>>