.page-faq {
  --faq-rule: rgba(17, 18, 20, .14);
  --faq-rule-night: rgba(231, 227, 218, .16);
  --faq-pad: clamp(20px, 3vw, 34px);
  display: block;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(26px, 4.5vw, 60px) 0 clamp(24px, 3.5vw, 48px);
  overflow: hidden;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: -18%;
  right: -14%;
  width: 66%;
  height: 136%;
  background: linear-gradient(135deg, rgba(11, 18, 32, .07), rgba(255, 90, 31, .08) 62%, rgba(200, 155, 60, .05));
  transform: skewX(-12deg);
  pointer-events: none;
}

.page-faq .faq-hero > .phx-container {
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero__title {
  max-width: 15ch;
}

.page-faq .faq-hero__lede {
  max-width: 46ch;
  margin-top: 20px;
}

.page-faq .faq-facts {
  margin: 6px 0 0;
  padding: 0 0 0 18px;
  border-left: 1px solid var(--phx-line-strong);
}

.page-faq .faq-facts__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  padding: 11px 0;
  border-bottom: 1px dashed var(--phx-line);
}

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

.page-faq .faq-facts dt {
  font-family: var(--phx-font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--phx-muted);
}

.page-faq .faq-facts dd {
  margin: 0;
  font-family: var(--phx-font-mono);
  font-size: 21px;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--phx-ink);
  line-height: 1;
}

.page-faq .faq-hero__strip {
  margin: 34px 0 0;
  border: 1px solid var(--phx-line);
  overflow: hidden;
  background: var(--phx-night);
}

.page-faq .faq-hero__strip img {
  display: block;
  width: 100%;
  height: clamp(110px, 15vw, 180px);
  object-fit: cover;
}

/* ---------- 主体分栏 ---------- */
.page-faq .faq-shell {
  padding-bottom: clamp(44px, 7vw, 92px);
}

/* ---------- 问题索引 ---------- */
.page-faq .faq-index {
  margin-bottom: 30px;
}

.page-faq .faq-index__title {
  margin: 0 0 12px;
  padding-bottom: 9px;
  border-bottom: 1px solid var(--phx-line-strong);
  font-family: var(--phx-font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--phx-muted);
}

.page-faq .faq-index .phx-toc__list {
  display: flex;
  gap: 7px;
  margin: 0;
  padding: 0 0 8px;
  list-style: none;
  overflow-x: auto;
  overscroll-behavior-x: contain;
  scrollbar-width: thin;
}

.page-faq .faq-index .phx-toc__list > li {
  list-style: none;
  flex: 0 0 auto;
}

.page-faq .faq-index .phx-toc__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 11px;
  border: 1px solid var(--faq-rule);
  color: var(--phx-ink);
  white-space: nowrap;
  text-decoration: none;
  font-size: 13px;
  line-height: 1.3;
  transition: border-color .18s var(--phx-ease), color .18s var(--phx-ease);
}

.page-faq .faq-index .phx-toc__link:hover {
  border-color: var(--phx-brass);
}

.page-faq .faq-index__num {
  font-family: var(--phx-font-mono);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--phx-muted);
  transition: color .18s var(--phx-ease);
}

.page-faq .faq-index .phx-toc__link:hover .faq-index__num,
.page-faq .faq-index .phx-toc__link.is-active .faq-index__num,
.page-faq .faq-index .phx-toc__link[aria-current="true"] .faq-index__num {
  color: var(--phx-flame);
}

/* ---------- 问答分组 ---------- */
.page-faq .faq-body {
  min-width: 0;
}

.page-faq .faq-group {
  position: relative;
  margin-bottom: 26px;
  padding: var(--faq-pad);
  background: var(--phx-bone);
  border: 1px solid var(--phx-line);
  box-shadow: var(--phx-shadow);
  scroll-margin-top: 76px;
}

.page-faq .faq-group--night {
  background: var(--phx-night);
  border-color: var(--faq-rule-night);
  box-shadow: none;
  color: var(--phx-mist);
}

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: baseline;
  column-gap: 14px;
  padding-bottom: 14px;
  margin-bottom: 4px;
  border-bottom: 1px solid var(--phx-brass);
}

.page-faq .faq-group__num {
  font-family: var(--phx-font-mono);
  font-size: 26px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: .02em;
  color: var(--phx-brass);
}

.page-faq .faq-group:not(.faq-group--night) .faq-group__num {
  color: var(--phx-accent-ink);
}

.page-faq .faq-group__head h2 {
  margin: 0;
  font-size: clamp(19px, 2.3vw, 25px);
  line-height: 1.3;
  letter-spacing: -.01em;
}

.page-faq .faq-group__meta {
  grid-column: 1 / -1;
  margin: 11px 0 0;
  font-family: var(--phx-font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--phx-muted);
}

.page-faq .faq-group--night .faq-group__meta {
  color: var(--phx-mist);
  opacity: .68;
}

/* ---------- 折叠条目 ---------- */
.page-faq .faq-group__list {
  margin-top: 6px;
}

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

.page-faq .faq-group--night .faq-item {
  border-bottom-color: var(--faq-rule-night);
}

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

.page-faq .faq-item__q {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr) 22px;
  gap: 12px;
  align-items: start;
  padding: 17px 2px;
  cursor: pointer;
  list-style: none;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.5;
  transition: color .18s var(--phx-ease);
}

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

.page-faq .faq-item__q::marker {
  content: "";
}

.page-faq .faq-item__num {
  font-family: var(--phx-font-mono);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: .08em;
  line-height: 2;
  color: var(--phx-muted);
  transition: color .18s var(--phx-ease);
}

.page-faq .faq-group--night .faq-item__num {
  color: rgba(231, 227, 218, .62);
}

.page-faq .faq-item__q:hover .faq-item__num,
.page-faq .faq-item[open] .faq-item__num {
  color: var(--phx-flame);
}

.page-faq .faq-item__mark {
  position: relative;
  justify-self: end;
  align-self: center;
  width: 22px;
  height: 22px;
  border: 1px solid var(--phx-line-strong);
  color: var(--phx-ink);
  transition: border-color .18s var(--phx-ease), color .18s var(--phx-ease);
}

.page-faq .faq-group--night .faq-item__mark {
  border-color: rgba(231, 227, 218, .32);
  color: var(--phx-mist);
}

.page-faq .faq-item__mark::before,
.page-faq .faq-item__mark::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 10px;
  height: 1px;
  background: currentColor;
  transform: translate(-50%, -50%);
}

.page-faq .faq-item__mark::after {
  transform: translate(-50%, -50%) rotate(90deg);
  transition: transform .22s var(--phx-ease);
}

.page-faq .faq-item[open] .faq-item__mark {
  border-color: var(--phx-brass);
  color: var(--phx-brass);
}

.page-faq .faq-item[open] .faq-item__mark::after {
  transform: translate(-50%, -50%) rotate(0deg);
}

.page-faq .faq-item__a {
  padding: 0 14px 22px 56px;
  border-left: 1px solid transparent;
  transition: border-color .24s var(--phx-ease), transform .24s var(--phx-ease);
}

.page-faq .faq-item[open] .faq-item__a {
  border-left-color: var(--phx-brass);
  transform: translateX(5px);
}

.page-faq .faq-item__a p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--phx-gray-ink);
}

.page-faq .faq-group--night .faq-item__a p {
  color: rgba(231, 227, 218, .82);
}

.page-faq .faq-item[open] .faq-item__a > p {
  animation: faqAnsIn .28s var(--phx-ease) both;
}

@keyframes faqAnsIn {
  from { opacity: 0; transform: translateY(-5px); }
  to { opacity: 1; transform: none; }
}

/* ---------- 字段示意图 ---------- */
.page-faq .faq-figure {
  margin: 20px 0 6px;
  background: var(--phx-bone);
  border: 1px solid var(--faq-rule);
}

.page-faq .faq-group--night .faq-figure {
  border-color: var(--faq-rule-night);
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 10 / 7;
  object-fit: cover;
}

.page-faq .faq-figure__cap {
  padding: 10px 13px;
  border-top: 1px solid var(--faq-rule);
  font-family: var(--phx-font-mono);
  font-size: 11px;
  letter-spacing: .04em;
  line-height: 1.65;
  color: var(--phx-muted);
}

.page-faq .faq-group--night .faq-figure__cap {
  border-top-color: var(--faq-rule-night);
  color: rgba(231, 227, 218, .68);
}

/* ---------- 收尾 ---------- */
.page-faq .faq-outro {
  display: grid;
  gap: 18px;
  padding: clamp(24px, 3vw, 36px);
  background: var(--phx-night-deep);
  border-top: 2px solid var(--phx-flame);
}

.page-faq .faq-outro__text {
  margin: 0;
  max-width: 52ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--phx-mist);
}

.page-faq .faq-outro__acts {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 窄屏 ---------- */
@media (max-width: 640px) {
  .page-faq .faq-item__q {
    grid-template-columns: 30px minmax(0, 1fr) 20px;
    gap: 9px;
    font-size: 15px;
    padding: 14px 0;
  }

  .page-faq .faq-item__a {
    padding: 0 6px 18px 39px;
  }

  .page-faq .faq-item[open] .faq-item__a {
    transform: translateX(3px);
  }

  .page-faq .faq-group__num {
    font-size: 21px;
  }
}

/* ---------- 桌面：左侧索引 + 右侧问答 ---------- */
@media (min-width: 940px) {
  .page-faq .faq-shell {
    display: grid;
    grid-template-columns: 228px minmax(0, 1fr);
    gap: clamp(28px, 4vw, 60px);
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 26px;
    margin-bottom: 0;
    max-height: calc(100vh - 56px);
    overflow-y: auto;
  }

  .page-faq .faq-index .phx-toc__list {
    flex-direction: column;
    gap: 0;
    padding-bottom: 0;
    border-top: 1px solid var(--phx-line);
    overflow: visible;
  }

  .page-faq .faq-index .phx-toc__list > li {
    flex: 1 1 auto;
  }

  .page-faq .faq-index .phx-toc__link {
    display: grid;
    grid-template-columns: 30px minmax(0, 1fr);
    gap: 10px;
    align-items: start;
    width: 100%;
    white-space: normal;
    padding: 10px 6px 10px 10px;
    border: 0;
    border-bottom: 1px solid var(--phx-line);
    border-left: 2px solid transparent;
    font-size: 12.5px;
    line-height: 1.55;
  }

  .page-faq .faq-index .phx-toc__link:hover {
    border-left-color: var(--phx-brass);
  }

  .page-faq .faq-index .phx-toc__link.is-active,
  .page-faq .faq-index .phx-toc__link[aria-current="true"],
  .page-faq .faq-index .phx-toc__link[aria-current="location"] {
    border-left-color: var(--phx-flame);
    color: var(--phx-flame);
    background: rgba(255, 90, 31, .05);
  }

  .page-faq .faq-hero__lede {
    margin-top: 24px;
  }
}
<<<END>>>