.page-faq {
  --faq-line: rgba(11, 27, 51, .14);
  --faq-line-soft: rgba(11, 27, 51, .08);
  --faq-tint: rgba(11, 27, 51, .045);
  --faq-dark-line: rgba(200, 211, 224, .18);
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding: clamp(26px, 5vw, 56px) 0 clamp(34px, 5vw, 68px);
  background:
    radial-gradient(820px 380px at 90% -12%, rgba(122, 108, 240, .16), transparent 70%),
    radial-gradient(640px 340px at 2% 0%, rgba(255, 107, 74, .13), transparent 68%),
    var(--paper);
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: clamp(22px, 4vw, 40px);
  margin-top: clamp(18px, 3.4vw, 34px);
}

.page-faq .faq-hero__title {
  margin: 10px 0 0;
  font-size: clamp(30px, 6.4vw, 58px);
  line-height: 1.1;
  letter-spacing: -.02em;
  font-weight: 800;
}

.page-faq .faq-hero__intro {
  margin: 16px 0 0;
  font-size: 16px;
  line-height: 1.78;
  color: var(--steel);
  max-width: 34em;
}

.page-faq .faq-hero__aside {
  position: relative;
  background: var(--white);
  border: 1px solid var(--faq-line);
  border-radius: var(--radius);
  padding: 22px 20px 6px;
}

.page-faq .faq-hero__aside::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--grad);
}

.page-faq .faq-hero__aside-title {
  margin: 0 0 6px;
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--steel);
  text-transform: uppercase;
}

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

.page-faq .faq-jump li + li {
  border-top: 1px solid var(--faq-line-soft);
}

.page-faq .faq-jump a {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  gap: 10px;
  align-items: baseline;
  padding: 13px 0;
  color: var(--ink);
  text-decoration: none;
  font-size: 14.5px;
  transition: color .2s var(--ease), padding-left .2s var(--ease);
}

.page-faq .faq-jump a:hover,
.page-faq .faq-jump a:focus-visible {
  color: var(--coral);
  padding-left: 5px;
}

.page-faq .faq-jump .mono {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .08em;
  color: var(--coral);
}

/* ---------- 三步路径 ---------- */
.page-faq .faq-guide__grid {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
}

.page-faq .faq-guide__figure {
  border: 1px solid var(--faq-line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--white);
}

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

.page-faq .faq-guide__caption {
  margin: 10px 0 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .1em;
  color: var(--steel);
}

.page-faq .faq-guide__note {
  margin: 12px 0 20px;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--steel);
  max-width: 32em;
}

.page-faq .faq-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .faq-steps__item {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  column-gap: 14px;
  padding: 18px 0;
  border-top: 1px solid var(--faq-line);
}

.page-faq .faq-steps__num {
  grid-row: 1 / span 2;
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 600;
  line-height: 1.2;
  color: var(--coral);
}

.page-faq .faq-steps__item h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  line-height: 1.4;
}

.page-faq .faq-steps__item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--steel);
}

/* ---------- 问答区 ---------- */
.page-faq .faq-qa__head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 12px 24px;
  margin-bottom: clamp(18px, 3vw, 28px);
}

.page-faq .faq-qa__count {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--steel);
}

.page-faq .faq-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 18px;
}

.page-faq .faq-chips .filter-btn {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .04em;
  padding: 8px 15px;
  border: 1px solid var(--faq-line);
  border-radius: 999px;
  background: var(--white);
  color: var(--ink);
  cursor: pointer;
  transition: background .2s var(--ease), color .2s var(--ease), border-color .2s var(--ease);
}

.page-faq .faq-chips .filter-btn:hover,
.page-faq .faq-chips .filter-btn:focus-visible {
  border-color: var(--coral);
  color: var(--coral);
}

.page-faq .faq-chips .filter-btn[aria-pressed="true"] {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--white);
}

.page-faq .faq-list {
  border-top: 1px solid var(--faq-line);
}

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

.page-faq .faq-item > summary {
  list-style: none;
  cursor: pointer;
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr) 26px;
  gap: 10px;
  align-items: start;
  padding: 16px 4px;
  transition: background .2s var(--ease);
}

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

.page-faq .faq-item > summary:hover {
  background: var(--faq-tint);
}

.page-faq .faq-item[open] > summary {
  background: var(--faq-tint);
}

.page-faq .faq-item__index {
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.9;
  color: var(--steel);
}

.page-faq .faq-item[open] .faq-item__index {
  color: var(--coral);
}

.page-faq .faq-item__q {
  display: block;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 16px;
  line-height: 1.55;
  color: var(--ink);
}

.page-faq .faq-item__cat {
  display: block;
  margin-top: 7px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .14em;
  color: var(--steel);
}

.page-faq .faq-item__cat--coral { color: var(--coral); }
.page-faq .faq-item__cat--celadon { color: #16926f; }
.page-faq .faq-item__cat--amber { color: #a97a10; }

.page-faq .faq-item__icon {
  position: relative;
  width: 26px;
  height: 26px;
  margin-top: 2px;
  border: 1px solid var(--faq-line);
  border-radius: 50%;
  color: var(--ink);
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.page-faq .faq-item__icon::before,
.page-faq .faq-item__icon::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  background: currentColor;
  transform: translate(-50%, -50%);
}

.page-faq .faq-item__icon::before {
  width: 10px;
  height: 1.5px;
}

.page-faq .faq-item__icon::after {
  width: 1.5px;
  height: 10px;
  transition: transform .2s var(--ease), opacity .2s var(--ease);
}

.page-faq .faq-item[open] .faq-item__icon {
  color: var(--coral);
  border-color: var(--coral);
}

.page-faq .faq-item[open] .faq-item__icon::after {
  transform: translate(-50%, -50%) scaleY(0);
  opacity: 0;
}

.page-faq .faq-item__a {
  padding: 2px 6px 20px;
}

.page-faq .faq-item__a p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--steel);
  max-width: 36em;
}

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

.page-faq .faq-item__a ol {
  margin: 10px 0 0;
  padding-left: 1.25em;
  color: var(--steel);
  font-size: 15px;
  line-height: 1.8;
  max-width: 36em;
}

.page-faq .faq-item__a ol li + li {
  margin-top: 5px;
}

.page-faq .faq-item__a a {
  color: var(--coral);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}

/* ---------- 版本记录 ---------- */
.page-faq .faq-version {
  background-color: var(--ink);
  background-image:
    linear-gradient(var(--faq-dark-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--faq-dark-line) 1px, transparent 1px);
  background-size: 72px 72px;
  color: var(--white);
}

.page-faq .faq-version__title {
  margin-top: 10px;
  max-width: 22em;
}

.page-faq .faq-version__grid {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
  margin-top: clamp(22px, 4vw, 38px);
}

.page-faq .faq-version__stat {
  border-left: 1px solid var(--faq-dark-line);
  padding-left: 18px;
}

.page-faq .faq-version__num {
  display: block;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(76px, 18vw, 156px);
  line-height: .82;
  letter-spacing: -.045em;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  -webkit-text-fill-color: transparent;
}

.page-faq .faq-version__stat-note {
  margin: 12px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--amber);
}

.page-faq .faq-version__stat-text {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--c-text-soft);
  max-width: 24em;
}

.page-faq .faq-version__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-faq .faq-version__item {
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr);
  gap: 12px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--faq-dark-line);
}

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

.page-faq .faq-version__item .mono {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .08em;
  color: var(--amber);
  padding-top: 4px;
}

.page-faq .faq-version__item h3 {
  margin: 0 0 5px;
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  color: var(--white);
}

.page-faq .faq-version__item p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--c-text-soft);
  max-width: 34em;
}

/* ---------- 案例标签 ---------- */
.page-faq .faq-case__grid {
  display: grid;
  gap: clamp(20px, 3.4vw, 36px);
}

.page-faq .faq-case__panel {
  position: relative;
  background: var(--white);
  border: 1px solid var(--faq-line);
  padding: 22px 20px;
  clip-path: polygon(0 0, calc(100% - 22px) 0, 100% 22px, 100% 100%, 0 100%);
}

.page-faq .faq-case__panel::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 22px;
  height: 22px;
  background: var(--grad);
  opacity: .9;
  clip-path: polygon(0 0, 100% 100%, 0 100%);
}

.page-faq .faq-case__panel-title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .14em;
  color: var(--steel);
}

.page-faq .faq-case__tags {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 16px;
  padding: 0;
}

.page-faq .faq-case__panel-text {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--steel);
  max-width: 30em;
}

.page-faq .faq-case__scenes {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .faq-case__scenes li {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  gap: 10px;
  padding: 11px 0;
  border-top: 1px solid var(--faq-line);
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--ink);
}

.page-faq .faq-case__scenes .mono {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .06em;
  color: var(--celadon);
  padding-top: 3px;
}

.page-faq .faq-case__body-note {
  margin: 16px 0 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--steel);
}

.page-faq .faq-case__body-note a {
  color: var(--coral);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
  margin-left: 4px;
}

/* ---------- 联系准备 ---------- */
.page-faq .faq-prep__grid {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
}

.page-faq .faq-prep__intro {
  margin: 12px 0 0;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--steel);
  max-width: 32em;
}

.page-faq .faq-check {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-faq .faq-check li {
  display: grid;
  grid-template-columns: 22px minmax(0, 1fr);
  gap: 12px;
  padding: 14px 16px;
  background: var(--white);
  border: 1px solid var(--faq-line);
  border-left: 3px solid transparent;
  border-image: var(--grad) 1;
  transition: transform .2s var(--ease);
}

.page-faq .faq-check li:hover {
  transform: translateX(3px);
}

.page-faq .faq-check__box {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  margin-top: 2px;
  border-radius: 2px;
  background: var(--grad);
  color: var(--white);
  font-size: 12px;
  line-height: 1;
}

.page-faq .faq-check li h3 {
  margin: 0 0 4px;
  font-family: var(--font-display);
  font-size: 15.5px;
  font-weight: 700;
}

.page-faq .faq-check li p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--steel);
}

.page-faq .faq-prep__figure {
  border: 1px solid var(--faq-line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--white);
}

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

.page-faq .faq-contact {
  margin-top: 18px;
  background: var(--white);
  border: 1px solid var(--faq-line);
  border-top: 3px solid var(--coral);
  padding: 18px 18px 16px;
}

.page-faq .faq-contact__title {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .14em;
  color: var(--steel);
}

.page-faq .faq-contact__row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 12px;
  padding: 11px 0;
  border-bottom: 1px dashed var(--faq-line);
}

.page-faq .faq-contact__key {
  flex: 0 0 42px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .1em;
  color: var(--steel);
}

.page-faq .faq-contact__value {
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--ink);
  text-decoration: none;
  word-break: break-all;
}

.page-faq .faq-contact__value:hover {
  color: var(--coral);
}

.page-faq .faq-contact__value--plain {
  color: var(--ink);
}

.page-faq .faq-contact .copy-btn {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .06em;
  padding: 5px 11px;
  border: 1px solid var(--faq-line);
  border-radius: 999px;
  background: var(--paper);
  color: var(--ink);
  cursor: pointer;
  transition: background .2s var(--ease), color .2s var(--ease), border-color .2s var(--ease);
}

.page-faq .faq-contact .copy-btn:hover,
.page-faq .faq-contact .copy-btn:focus-visible {
  background: var(--coral);
  border-color: var(--coral);
  color: var(--white);
}

.page-faq .faq-contact__note {
  margin: 12px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--steel);
}

.page-faq .faq-contact__note a {
  color: var(--coral);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-case__scenes {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-faq .faq-item > summary {
    grid-template-columns: 42px minmax(0, 1fr) 28px;
    gap: 14px;
    padding: 18px 6px;
  }
  .page-faq .faq-item__q {
    font-size: 17px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.42fr) minmax(0, .72fr);
    align-items: start;
  }
  .page-faq .faq-guide__grid {
    grid-template-columns: minmax(0, .88fr) minmax(0, 1.12fr);
    align-items: start;
  }
  .page-faq .faq-version__grid {
    grid-template-columns: minmax(0, .62fr) minmax(0, 1.38fr);
    align-items: start;
  }
  .page-faq .faq-case__grid {
    grid-template-columns: minmax(0, .88fr) minmax(0, 1.12fr);
    align-items: start;
  }
  .page-faq .faq-prep__grid {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, .98fr);
    align-items: start;
  }
  .page-faq .faq-item__a {
    padding-left: 56px;
    padding-right: 44px;
  }
  .page-faq .faq-case__scenes {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-check li,
  .page-faq .faq-jump a,
  .page-faq .faq-item__icon::after,
  .page-faq .faq-chips .filter-btn {
    transition: none;
  }
  .page-faq .faq-check li:hover {
    transform: none;
  }
}
<<<END>>>