.page-faq {
  --faq-pad: clamp(1rem, 3vw, 1.5rem);
  --faq-shell-narrow: 900px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(1.5rem, 5vw, 3.25rem) 0 clamp(2rem, 5vw, 3.25rem);
  background:
    linear-gradient(180deg, rgba(7, 11, 20, 0.4) 0%, rgba(7, 11, 20, 0.9) 100%),
    var(--nebula);
  border-bottom: 1px solid var(--hairline);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.32;
  background-image:
    repeating-linear-gradient(0deg, transparent 0 39px, var(--hairline-soft) 39px 40px),
    repeating-linear-gradient(90deg, transparent 0 39px, var(--hairline-soft) 39px 40px);
}

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

.page-faq .faq-hero .breadcrumb {
  margin-bottom: 1.25rem;
}

.page-faq .faq-hero h1 {
  margin: 0.5rem 0 0;
  max-width: 20ch;
  font-size: clamp(2rem, 5.4vw, 4rem);
}

.page-faq .faq-hero__lede {
  max-width: 58ch;
  margin-top: 1rem;
  color: var(--silver);
  opacity: 0.88;
}

.page-faq .faq-index {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1.75rem;
}

.page-faq .faq-index .chip {
  text-decoration: none;
}

/* ---------- 三步法 ---------- */
.page-faq .faq-steps {
  border-bottom: 1px solid var(--hairline-soft);
}

.page-faq .faq-steps__grid {
  margin-top: clamp(1.5rem, 4vw, 2.5rem);
}

.page-faq .faq-diagram {
  margin: 0;
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--midnight);
  box-shadow: 0 18px 40px -28px rgba(0, 0, 0, 0.9);
}

.page-faq .faq-diagram img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 12 / 7;
}

.page-faq .faq-diagram__cap {
  padding: 0.75rem 1rem;
  font-size: 0.8125rem;
  line-height: 1.6;
  color: var(--orbit);
  background: var(--panel);
  border-top: 1px solid var(--hairline-soft);
}

.page-faq .faq-diagram--replay {
  margin-bottom: 1.5rem;
}

.page-faq .faq-diagram--replay img {
  aspect-ratio: 10 / 7;
}

.page-faq .faq-flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.75rem;
}

.page-faq .faq-flow__item {
  position: relative;
  padding: var(--faq-pad) var(--faq-pad) var(--faq-pad) calc(var(--faq-pad) + 0.9rem);
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  background: var(--panel);
}

.page-faq .faq-flow__item::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 3px;
  border-radius: var(--radius) 0 0 var(--radius);
  background: linear-gradient(180deg, var(--signal), var(--mist));
}

.page-faq .faq-flow__num {
  display: block;
  font-size: 0.8125rem;
  letter-spacing: 0.1em;
  color: var(--signal);
}

.page-faq .faq-flow__title {
  margin: 0.375rem 0 0.5rem;
  font-size: 1.125rem;
}

.page-faq .faq-flow__text {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--orbit);
}

/* ---------- 问答主体布局 ---------- */
.page-faq .faq-layout {
  display: grid;
  gap: clamp(1.5rem, 4vw, 3rem);
  grid-template-columns: 1fr;
}

.page-faq .faq-side__label {
  margin: 0 0 0.875rem;
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  color: var(--orbit);
  text-transform: uppercase;
}

.page-faq .faq-side__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.page-faq .faq-side__list a {
  display: inline-block;
  padding: 0.4375rem 0.75rem;
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--silver);
  text-decoration: none;
  background: var(--midnight);
  transition: border-color var(--seek) ease, color var(--seek) ease, background var(--seek) ease;
}

.page-faq .faq-side__list a:hover,
.page-faq .faq-side__list a:focus-visible {
  border-color: var(--signal);
  color: var(--signal-soft);
  background: var(--panel);
}

.page-faq .faq-group {
  padding-bottom: clamp(1.5rem, 4vw, 2.5rem);
  margin-bottom: clamp(1.5rem, 4vw, 2.5rem);
  border-bottom: 1px solid var(--hairline-soft);
  scroll-margin-top: 96px;
}

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

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}

.page-faq .faq-group__num {
  font-size: 0.8125rem;
  letter-spacing: 0.1em;
  color: var(--signal);
}

.page-faq .faq-group__head h2 {
  margin: 0;
  font-size: clamp(1.25rem, 2.4vw, 1.75rem);
}

/* ---------- 折叠问答 ---------- */
.page-faq .qa {
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  background: var(--panel);
  margin-bottom: 0.625rem;
  transition: border-color var(--seek) ease, background var(--seek) ease;
}

.page-faq .qa:last-of-type {
  margin-bottom: 0;
}

.page-faq .qa[open] {
  border-color: rgba(255, 122, 26, 0.42);
  background: var(--panel-2);
}

.page-faq .qa__q {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.9375rem 1.125rem;
  cursor: pointer;
  list-style: none;
  font-weight: 600;
  color: var(--silver);
  line-height: 1.55;
  transition: color var(--seek) ease;
}

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

.page-faq .qa__q:hover {
  color: var(--signal-soft);
}

.page-faq .qa__q::after {
  content: "+";
  margin-left: auto;
  flex: none;
  font-family: var(--font-mono);
  font-size: 1.125rem;
  line-height: 1.2;
  color: var(--signal);
}

.page-faq .qa[open] .qa__q::after {
  content: "\2212";
  color: var(--signal-soft);
}

.page-faq .qa__n {
  flex: none;
  font-size: 0.8125rem;
  letter-spacing: 0.06em;
  color: var(--orbit);
  padding-top: 0.15rem;
}

.page-faq .qa__a {
  padding: 0 1.125rem 1.125rem 2.75rem;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--orbit);
}

.page-faq .qa__a p {
  margin: 0 0 0.75em;
}

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

.page-faq .qa__a a {
  color: var(--mist);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .qa__a a:hover {
  color: var(--signal-soft);
}

/* ---------- 收尾联系卡 ---------- */
.page-faq .faq-contact {
  margin-top: clamp(1.5rem, 4vw, 2.25rem);
}

.page-faq .faq-contact__card {
  display: grid;
  gap: clamp(1.25rem, 3vw, 2rem);
  padding: clamp(1.5rem, 4vw, 2.5rem);
  border: 1px solid rgba(255, 122, 26, 0.34);
  border-radius: var(--radius-lg);
  background:
    linear-gradient(150deg, var(--panel) 0%, var(--panel-2) 68%, rgba(255, 122, 26, 0.16) 130%);
}

.page-faq .faq-contact__card h3 {
  margin: 0.5rem 0 0.75rem;
  font-size: clamp(1.2rem, 2.2vw, 1.5rem);
}

.page-faq .faq-contact__text {
  margin: 0 0 0.875rem;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--orbit);
}

.page-faq .faq-contact__side {
  display: grid;
  gap: 0.625rem;
  align-content: start;
}

.page-faq .faq-contact__phone {
  margin: 0;
  font-size: 1.125rem;
  letter-spacing: 0.06em;
  color: var(--silver);
}

.page-faq .faq-contact__note {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.75;
  color: var(--orbit);
}

.page-faq .faq-contact__note a {
  color: var(--mist);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-contact__card .copy-row {
  flex-wrap: wrap;
}

/* ---------- 桌面布局 ---------- */
@media (min-width: 1000px) {
  .page-faq .faq-layout {
    grid-template-columns: minmax(180px, 220px) minmax(0, 1fr);
    align-items: start;
  }

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

  .page-faq .faq-side__list {
    flex-direction: column;
  }

  .page-faq .faq-side__list a {
    display: block;
  }

  .page-faq .faq-contact__card {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
    align-items: center;
  }
}

@media (min-width: 1180px) {
  .page-faq .faq-contact {
    max-width: var(--faq-shell-narrow);
    margin-left: auto;
    margin-right: auto;
  }
}

/* ---------- 窄屏收敛 ---------- */
@media (max-width: 560px) {
  .page-faq .faq-hero h1 {
    font-size: clamp(1.75rem, 8vw, 2.25rem);
    max-width: none;
  }

  .page-faq .qa__a {
    padding-left: 1.125rem;
  }

  .page-faq .qa__q {
    font-size: 0.9375rem;
  }

  .page-faq .faq-contact__card .copy-value {
    display: block;
    word-break: break-all;
  }
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-faq .qa,
  .page-faq .faq-side__list a,
  .page-faq .qa__q {
    transition: none;
  }
}
<<<END>>>