.page-faq {
  --faq-dot: rgba(11, 27, 58, .24);
  --faq-dot-dark: rgba(214, 235, 247, .26);
  --faq-indent: clamp(18px, 3.4vw, 26px);
  background: var(--paper);
  color: var(--charcoal);
}

/* ---------- 首屏框景 ---------- */

.page-faq .faq-masthead {
  position: relative;
  overflow: hidden;
  background-color: var(--navy);
  background-image:
    linear-gradient(rgba(127, 196, 232, .075) 1px, transparent 1px),
    linear-gradient(90deg, rgba(127, 196, 232, .075) 1px, transparent 1px);
  background-size: 100% 38px, 38px 100%;
  color: var(--cream);
  padding: calc(var(--header-h) + clamp(30px, 6vw, 72px)) 0 clamp(48px, 7vw, 88px);
}

.page-faq .faq-masthead::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: clamp(90px, 22vw, 200px);
  background: linear-gradient(180deg, var(--ice) 0%, rgba(127, 196, 232, 0) 100%);
  pointer-events: none;
}

.page-faq .faq-masthead::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  width: clamp(88px, 20vw, 240px);
  height: clamp(14px, 2.6vw, 30px);
  background: var(--referee);
  clip-path: polygon(100% 0, 100% 100%, 0 100%);
  pointer-events: none;
}

.page-faq .faq-masthead__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4.5vw, 52px);
  align-items: end;
}

.page-faq .breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 20px;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
}

.page-faq .breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  margin-right: 8px;
  color: rgba(214, 235, 247, .45);
}

.page-faq .breadcrumb__link,
.page-faq .breadcrumb__current {
  color: rgba(214, 235, 247, .8);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .25s var(--ease), border-color .25s var(--ease);
}

.page-faq .breadcrumb__link:hover {
  color: var(--ice);
  border-bottom-color: var(--ice);
}

.page-faq .faq-masthead__kicker {
  margin: 0;
  color: var(--ice);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  text-transform: uppercase;
}

.page-faq .faq-masthead__title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(42px, 10vw, 78px);
  line-height: .94;
  letter-spacing: -.015em;
  color: var(--cream);
}

.page-faq .faq-masthead__lede {
  margin: 20px 0 0;
  max-width: 36em;
  color: rgba(214, 235, 247, .86);
  font-family: var(--font-serif);
  font-size: clamp(16px, 1.7vw, 18px);
  line-height: 1.8;
}

.page-faq .faq-masthead__figure {
  margin: 0;
  aspect-ratio: 16 / 10;
  border: 1px solid var(--line-dark);
}

/* ---------- 分组索引条 ---------- */

.page-faq .faq-jump {
  background: var(--ice-soft);
  border-bottom: 1px solid var(--line-strong);
}

.page-faq .faq-jump__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 26px;
  margin: 0;
  padding: 16px 0;
  list-style: none;
}

.page-faq .faq-jump__item {
  position: relative;
}

.page-faq .faq-jump__item + .faq-jump__item::before {
  content: "";
  position: absolute;
  left: -14px;
  top: 50%;
  width: 4px;
  height: 4px;
  margin-top: -2px;
  background: var(--stone);
  border-radius: 50%;
}

.page-faq .faq-jump__link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  color: var(--navy);
  font-size: 14px;
  line-height: 1.4;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .25s var(--ease), border-color .25s var(--ease);
}

.page-faq .faq-jump__num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--clay);
}

.page-faq .faq-jump__link:hover,
.page-faq .faq-jump__link:focus-visible {
  color: var(--referee);
  border-bottom-color: var(--referee);
}

/* ---------- 章节骨架 ---------- */

.page-faq .faq-section {
  padding: clamp(40px, 6.5vw, 80px) 0;
}

.page-faq .faq-section--soft {
  background: var(--ice-soft);
}

.page-faq .faq-section--dark {
  background: var(--navy);
  color: var(--cream);
}

.page-faq .faq-section__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 4px 18px;
  align-items: start;
  margin-bottom: clamp(20px, 3.4vw, 36px);
}

.page-faq .faq-section__num {
  font-family: var(--font-mono);
  font-size: clamp(30px, 6vw, 48px);
  line-height: .9;
  color: var(--clay);
  letter-spacing: -.02em;
}

.page-faq .faq-section__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(24px, 4vw, 36px);
  line-height: 1.1;
  letter-spacing: -.01em;
  color: var(--navy);
}

.page-faq .faq-section__desc {
  margin: 10px 0 0;
  max-width: 40em;
  font-size: 15px;
  line-height: 1.7;
  color: var(--stone);
}

.page-faq .faq-section__body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 48px);
  align-items: start;
}

.page-faq .faq-section__figure {
  margin: 0;
  aspect-ratio: 10 / 7;
  border: 1px solid var(--line-strong);
}

/* ---------- 问答手风琴 ---------- */

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

.page-faq .faq-item {
  position: relative;
  border-bottom: 1px dotted var(--faq-dot);
}

.page-faq .faq-item__q {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 16px 42px 16px var(--faq-indent);
  cursor: pointer;
  list-style: none;
  position: relative;
  transition: background-color .25s var(--ease);
}

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

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

.page-faq .faq-item__q::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  bottom: 12px;
  width: 3px;
  background: var(--referee);
  transform: scaleY(0);
  transform-origin: top center;
  transition: transform .3s var(--ease);
}

.page-faq .faq-item[open] > .faq-item__q::before {
  transform: scaleY(1);
}

.page-faq .faq-item__q::after {
  content: "";
  position: absolute;
  right: 16px;
  top: 50%;
  width: 9px;
  height: 9px;
  margin-top: -7px;
  border-right: 1.5px solid var(--navy);
  border-bottom: 1.5px solid var(--navy);
  transform: rotate(45deg);
  transition: transform .3s var(--ease);
}

.page-faq .faq-item[open] > .faq-item__q::after {
  transform: rotate(-135deg);
  margin-top: -2px;
}

.page-faq .faq-item__q:hover {
  background: rgba(127, 196, 232, .16);
}

.page-faq .faq-item__num {
  flex: 0 0 auto;
  min-width: 2.9em;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--clay);
  padding-top: 4px;
}

.page-faq .faq-item__text {
  margin: 0;
  font-family: var(--font-body);
  font-weight: 500;
  font-size: clamp(16px, 1.7vw, 18px);
  line-height: 1.55;
  color: var(--navy);
}

.page-faq .faq-item__body {
  padding: 4px 24px 22px var(--faq-indent);
}

.page-faq .faq-item__a {
  margin: 0;
  padding: 14px 16px 16px;
  background: var(--ice-soft);
  border-left: 2px solid var(--ice);
  font-size: 16px;
  line-height: 1.78;
  color: var(--charcoal);
}

.page-faq .faq-item__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
  opacity: 1;
}

.page-faq .faq-item[open] .faq-item__tags {
  animation: faq-tag-in .34s var(--ease) both;
}

.page-faq .faq-item__tags .tag {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .02em;
}

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

/* ---------- 深色协助区 ---------- */

.page-faq .faq-assist__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 56px);
  align-items: start;
}

.page-faq .faq-assist__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(30px, 6vw, 46px);
  line-height: .9;
  color: var(--clay);
  letter-spacing: -.02em;
}

.page-faq .faq-assist__title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(26px, 4.4vw, 40px);
  line-height: 1.08;
  letter-spacing: -.01em;
  color: var(--cream);
}

.page-faq .faq-assist__lead {
  margin: 18px 0 0;
  max-width: 34em;
  color: rgba(214, 235, 247, .84);
  font-family: var(--font-serif);
  font-size: 16px;
  line-height: 1.8;
}

.page-faq .faq-assist__contact {
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--faq-dot-dark);
}

.page-faq .faq-assist__row {
  display: grid;
  grid-template-columns: 5.4em minmax(0, 1fr);
  gap: 4px 16px;
  padding: 16px 0;
  border-bottom: 1px dotted var(--faq-dot-dark);
}

.page-faq .faq-assist__key {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--ice);
}

.page-faq .faq-assist__value {
  margin: 0;
  font-size: 16px;
  line-height: 1.6;
  color: var(--cream);
  word-break: break-word;
}

.page-faq .faq-assist__link {
  color: var(--cream);
  text-decoration: none;
  border-bottom: 1px solid rgba(127, 196, 232, .5);
  transition: color .25s var(--ease), border-color .25s var(--ease);
}

.page-faq .faq-assist__link:hover {
  color: var(--ice);
  border-bottom-color: var(--ice);
}

.page-faq .faq-assist__note {
  margin: 16px 0 0;
  font-size: 13px;
  line-height: 1.75;
  color: rgba(214, 235, 247, .62);
}

/* ---------- 响应式 ---------- */

@media (min-width: 700px) {
  .page-faq .faq-masthead__figure {
    aspect-ratio: 14 / 9;
  }

  .page-faq .faq-assist__row {
    grid-template-columns: 6.5em minmax(0, 1fr);
  }
}

@media (min-width: 960px) {
  .page-faq .faq-masthead__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

  .page-faq .faq-section__body {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: clamp(28px, 4vw, 56px);
  }

  .page-faq .faq-assist__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
  }

  .page-faq .faq-item__q {
    padding-top: 18px;
    padding-bottom: 18px;
  }

  .page-faq .faq-item__q::before {
    top: 14px;
    bottom: 14px;
  }
}

@media (min-width: 1200px) {
  .page-faq .faq-list {
    border-top-color: var(--faq-dot);
  }

  .page-faq .faq-item__text {
    max-width: 52em;
  }

  .page-faq .faq-item__a {
    max-width: 62em;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item__q::before,
  .page-faq .faq-item__q::after,
  .page-faq .faq-item__q {
    transition: none;
  }

  .page-faq .faq-item[open] .faq-item__tags {
    animation: none;
    opacity: 1;
    transform: none;
  }
}
<<<END>>>