.page-faq {
  --faq-rail: 268px;
  --faq-gap: clamp(28px, 4vw, 56px);
}

.page-faq .faq-crumb-wrap {
  padding-top: clamp(14px, 2.4vw, 26px);
}

.page-faq .breadcrumb {
  font-family: var(--font-mono);
  font-size: var(--fs-anno);
  color: var(--c-mute);
}

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

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

.page-faq .breadcrumb [aria-current="page"] {
  color: var(--c-white);
}

/* ---------- 页头 ---------- */

.page-faq .faq-hero {
  position: relative;
  margin-top: clamp(14px, 2.4vw, 24px);
  overflow: hidden;
  background: var(--c-deck);
  border-top: 1px solid var(--c-line);
  border-bottom: 2px solid var(--c-line);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  right: -8%;
  bottom: -40%;
  width: 46%;
  height: 150%;
  background: linear-gradient(160deg, rgba(138, 92, 255, .18), rgba(0, 240, 208, .06) 62%, transparent 78%);
  clip-path: polygon(38% 0, 100% 0, 100% 100%, 0 100%);
  pointer-events: none;
}

.page-faq .faq-hero__media {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.page-faq .faq-hero__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .3;
  filter: saturate(.55) contrast(1.12);
}

.page-faq .faq-hero__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(104deg, var(--c-void) 16%, rgba(5, 7, 12, .82) 52%, rgba(5, 7, 12, .42) 100%);
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
  padding-block: clamp(40px, 6vw, 84px) clamp(32px, 4.5vw, 60px);
}

.page-faq .faq-hero__inner h1 {
  margin: 14px 0 0;
  max-width: 18em;
  font-size: clamp(32px, 6.2vw, 62px);
  line-height: 1.08;
  letter-spacing: -.02em;
  font-weight: 800;
  color: var(--c-white);
}

.page-faq .faq-hero__lede {
  margin: 20px 0 0;
  max-width: 32em;
  font-size: var(--fs-body);
  line-height: 1.75;
  color: var(--c-mute);
}

.page-faq .faq-hero__stats {
  list-style: none;
  margin: clamp(28px, 4vw, 40px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 20px;
  border-top: 1px solid var(--c-line);
  padding-top: 22px;
  max-width: 60rem;
}

.page-faq .faq-hero__stats li {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}

.page-faq .faq-hero__stats .num {
  font-family: var(--font-mono);
  font-size: clamp(20px, 2.6vw, 27px);
  color: var(--c-cyan);
  letter-spacing: -.01em;
  line-height: 1.1;
}

.page-faq .faq-hero__stat-k {
  font-size: var(--fs-sm);
  color: var(--c-mute);
  line-height: 1.5;
}

/* ---------- 两栏骨架 ---------- */

.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--faq-gap);
  padding-block: clamp(34px, 5vw, 62px) clamp(48px, 7vw, 96px);
  align-items: start;
}

/* ---------- 左栏索引 ---------- */

.page-faq .faq-index {
  background: var(--c-panel);
  border: 1px solid var(--c-line);
  box-shadow: var(--shadow-hard-sm);
  padding: 18px 16px 16px;
  min-width: 0;
}

.page-faq .faq-index__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: var(--fs-anno);
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--c-mute);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .faq-index__link {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: baseline;
  gap: 12px;
  padding: 11px 8px;
  border-bottom: 1px solid var(--c-line);
  color: var(--c-white);
  text-decoration: none;
  transition: background var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}

.page-faq .faq-index__link:hover {
  background: rgba(0, 240, 208, .07);
}

.page-faq .faq-index__link:focus-visible {
  outline: 2px solid var(--c-cyan);
  outline-offset: 2px;
}

.page-faq .faq-index__num {
  font-family: var(--font-mono);
  font-size: var(--fs-anno);
  color: var(--c-purple);
}

.page-faq .faq-index__name {
  font-size: 15px;
  font-weight: 500;
  line-height: 1.4;
}

.page-faq .faq-index__count {
  font-family: var(--font-mono);
  font-size: var(--fs-anno);
  color: var(--c-cyan);
}

.page-faq .faq-index__note {
  margin: 12px 0 0;
  font-family: var(--font-mono);
  font-size: var(--fs-anno);
  color: var(--c-mute);
  line-height: 1.6;
}

.page-faq .faq-index__cta {
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--c-line);
}

/* ---------- 右栏问答流 ---------- */

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

.page-faq .faq-chapter {
  margin-bottom: clamp(38px, 5.5vw, 64px);
  scroll-margin-top: 96px;
}

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

.page-faq .faq-chapter__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px 18px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--c-line);
  margin-bottom: 8px;
}

.page-faq .faq-chapter__title {
  margin: 0;
  font-size: clamp(22px, 3.4vw, 32px);
  line-height: 1.2;
  letter-spacing: -.01em;
  font-weight: 800;
  color: var(--c-white);
}

.page-faq .faq-chapter__meta {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--fs-anno);
  color: var(--c-amber);
  letter-spacing: .04em;
}

/* ---------- 折叠条目 ---------- */

.page-faq .faq-item {
  position: relative;
  border-bottom: 1px solid var(--c-line);
}

.page-faq .faq-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: transparent;
  transition: background var(--t-fast) var(--ease);
}

.page-faq .faq-item[open]::before {
  background: var(--c-cyan);
}

.page-faq .faq-item__q {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px 8px 16px 14px;
  cursor: pointer;
  list-style: none;
  transition: background var(--t-fast) var(--ease), color var(--t-fast) var(--ease);
}

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

.page-faq .faq-item__q:hover {
  background: rgba(0, 240, 208, .05);
}

.page-faq .faq-item__q:focus-visible {
  outline: 2px solid var(--c-cyan);
  outline-offset: 2px;
}

.page-faq .faq-item__mark {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 16px;
  line-height: 1.55;
  color: var(--c-cyan);
  width: 1em;
  text-align: center;
}

.page-faq .faq-item__mark::before {
  content: "+";
}

.page-faq .faq-item[open] .faq-item__mark::before {
  content: "−";
}

.page-faq .faq-item__text {
  font-size: var(--fs-body);
  font-weight: 500;
  line-height: 1.6;
  color: var(--c-white);
}

.page-faq .faq-item[open] .faq-item__text {
  color: var(--c-cyan);
}

.page-faq .faq-item__a {
  padding: 0 12px 20px 14px;
}

.page-faq .faq-item__a p {
  margin: 0;
  max-width: 34em;
  font-size: var(--fs-body);
  line-height: 1.78;
  color: var(--c-mute);
}

.page-faq .faq-item__a p + p {
  margin-top: 12px;
}

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

.page-faq .faq-item__a a:hover {
  color: var(--c-white);
}

.page-faq .faq-item__a a:focus-visible {
  outline: 2px solid var(--c-cyan);
  outline-offset: 2px;
}

/* ---------- 配图 ---------- */

.page-faq .faq-figure {
  margin: 16px 0 22px;
  border: 1px solid var(--c-line);
  background: var(--c-panel);
  box-shadow: var(--shadow-hard-sm);
}

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

.page-faq .faq-figure figcaption {
  padding: 10px 14px;
  border-top: 1px solid var(--c-line);
  font-family: var(--font-mono);
  font-size: var(--fs-anno);
  line-height: 1.6;
  color: var(--c-mute);
}

/* ---------- 联络清单 ---------- */

.page-faq .faq-prep {
  list-style: none;
  counter-reset: faqprep;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-faq .faq-prep li {
  counter-increment: faqprep;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
  padding: 11px 14px;
  background: var(--c-deck);
  border-left: 2px solid var(--c-purple);
  font-size: var(--fs-sm);
  line-height: 1.7;
  color: var(--c-mute);
}

.page-faq .faq-prep li::before {
  content: counter(faqprep, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: var(--fs-anno);
  color: var(--c-cyan);
}

.page-faq .faq-prep strong {
  color: var(--c-white);
  font-weight: 500;
}

/* ---------- 服务信息面板 ---------- */

.page-faq .faq-sla {
  margin-top: 20px;
  padding: 18px 16px;
  background: var(--c-panel);
  border: 1px solid var(--c-line);
  border-top: 2px solid var(--c-cyan);
  box-shadow: var(--shadow-hard-sm);
}

.page-faq .faq-sla__row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 6px 18px;
  padding: 9px 0;
  border-bottom: 1px solid var(--c-line);
}

.page-faq .faq-sla__k {
  font-family: var(--font-mono);
  font-size: var(--fs-anno);
  letter-spacing: .06em;
  color: var(--c-mute);
}

.page-faq .faq-sla__v {
  font-size: var(--fs-sm);
  color: var(--c-white);
  word-break: break-word;
}

.page-faq .faq-sla__v--mono {
  font-family: var(--font-mono);
  font-size: 13px;
}

.page-faq .faq-sla__note {
  margin: 12px 0 0;
  font-size: var(--fs-sm);
  line-height: 1.7;
  color: var(--c-mute);
}

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

.page-faq .faq-sla__note a:focus-visible {
  outline: 2px solid var(--c-cyan);
  outline-offset: 2px;
}

/* ---------- 响应式 ---------- */

@media (min-width: 720px) {
  .page-faq .faq-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

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

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

  .page-faq .faq-index__cta .btn {
    width: 100%;
    justify-content: center;
  }

  .page-faq .faq-item__a {
    padding-left: 34px;
  }
}

@media (min-width: 1200px) {
  .page-faq .faq-hero__inner h1 {
    max-width: 16em;
  }
}

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