.page-faq {
  --faq-index: 280px;
  padding-bottom: clamp(48px, 7vw, 96px);
}

.page-faq .page-head__title {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: .01em;
  line-height: 1.12;
  max-width: 24ch;
}

.page-faq .faq-head__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
  margin-top: 22px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .05em;
  color: var(--mist);
}

.page-faq .faq-head__meta b {
  color: var(--cyan);
  font-weight: 600;
}

/* 首屏流程图 */
.page-faq .faq-hero {
  position: relative;
  margin: clamp(24px, 4vw, 40px) 0 0;
  padding: 0;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border: 1px solid var(--line-strong);
  background: var(--pitch-2);
}

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

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(200deg, rgba(47, 243, 208, .14), transparent 42%);
  box-shadow: inset 0 0 0 1px rgba(47, 243, 208, .18);
}

.page-faq .faq-hero .media__caption {
  position: absolute;
  left: 0;
  bottom: 0;
  z-index: 1;
  margin: 0;
  padding: 9px 14px;
  background: rgba(2, 10, 8, .84);
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .05em;
  color: var(--mist);
}

@media (min-width: 760px) {
  .page-faq .faq-hero {
    aspect-ratio: 16 / 7;
  }
}

/* 三步自查流程带 */
.page-faq .faq-flow {
  margin-top: clamp(28px, 4.5vw, 56px);
  padding: clamp(20px, 3vw, 34px) 0;
  border-top: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-flow__list {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-faq .faq-flow__item {
  position: relative;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 14px;
  padding-bottom: 16px;
  border-bottom: 1px dashed var(--line);
}

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

.page-faq .faq-flow__num {
  font-family: var(--font-mono);
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 600;
  line-height: 1;
  color: var(--cyan);
}

.page-faq .faq-flow__step {
  margin: 0;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: .04em;
  text-transform: uppercase;
  color: var(--white);
}

.page-faq .faq-flow__desc {
  margin: 7px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
}

@media (min-width: 860px) {
  .page-faq .faq-flow__list {
    grid-template-columns: repeat(3, 1fr);
    gap: 0;
  }

  .page-faq .faq-flow__item {
    padding: 0 clamp(20px, 3vw, 40px) 0 0;
    border-bottom: 0;
  }

  .page-faq .faq-flow__item::after {
    content: "";
    position: absolute;
    right: 0;
    top: 12px;
    width: clamp(16px, 2.4vw, 32px);
    height: 1px;
    background: linear-gradient(90deg, var(--blue), transparent);
  }

  .page-faq .faq-flow__item:last-child {
    padding-right: 0;
  }

  .page-faq .faq-flow__item:last-child::after {
    display: none;
  }
}

/* 双栏主体 */
.page-faq .faq-layout {
  margin-top: clamp(28px, 4vw, 52px);
  display: grid;
  gap: clamp(28px, 3.5vw, 48px);
}

@media (min-width: 920px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-index) minmax(0, 1fr);
    align-items: start;
  }
}

.page-faq .faq-side {
  display: grid;
  gap: clamp(18px, 2vw, 26px);
  min-width: 0;
}

@media (min-width: 920px) {
  .page-faq .faq-side {
    position: sticky;
    top: 96px;
  }
}

/* 左侧分类索引 */
.page-faq .faq-index {
  border: 1px solid var(--line-strong);
  background: linear-gradient(180deg, var(--pitch-2), var(--pitch));
  padding: 16px 16px 8px;
}

.page-faq .faq-index__title {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 10px 0 0;
  padding: 0;
}

.page-faq .faq-index__link {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 11px 2px;
  border-top: 1px solid var(--line);
  font-size: 14px;
  line-height: 1.4;
  color: var(--paper);
  text-decoration: none;
  transition: color var(--dur) var(--ease), padding-left var(--dur) var(--ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--cyan);
  padding-left: 8px;
}

.page-faq .faq-index__count {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--mist);
  flex: 0 0 auto;
}

/* 侧栏图与帮助卡 */
.page-faq .faq-side__media {
  padding: 0;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--pitch-2);
}

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

@media (min-width: 920px) {
  .page-faq .faq-side__media {
    aspect-ratio: 3 / 4;
  }
}

.page-faq .faq-side__help .faq-side__text {
  margin: 8px 0 16px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
}

/* 右侧问答 */
.page-faq .faq-body {
  display: grid;
  gap: clamp(32px, 4vw, 54px);
  min-width: 0;
}

.page-faq .faq-sec {
  scroll-margin-top: 110px;
}

.page-faq .faq-sec__head {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: baseline;
  gap: 6px 12px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--cyan);
}

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

.page-faq .faq-sec__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(21px, 3vw, 30px);
  font-weight: 700;
  letter-spacing: .01em;
  line-height: 1.2;
  color: var(--white);
}

.page-faq .faq-sec__head .tag {
  grid-column: 2;
  justify-self: start;
  margin-left: 0;
}

.page-faq .faq-sec__lead {
  margin: 14px 0 4px;
  font-size: 15px;
  line-height: 1.78;
  color: var(--mist);
  max-width: 66ch;
}

/* 折叠条目 */
.page-faq .qa {
  border-bottom: 1px solid var(--line);
}

.page-faq .qa__q {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: start;
  gap: 12px;
  padding: 16px 0;
  list-style: none;
  cursor: pointer;
}

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

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

.page-faq .qa__q:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

.page-faq .qa__num {
  padding-top: 4px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .04em;
  color: var(--mist);
}

.page-faq .qa__text {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--white);
  transition: color var(--dur) var(--ease);
}

.page-faq .qa__q:hover .qa__text,
.page-faq .qa__q:focus-visible .qa__text {
  color: var(--cyan);
}

.page-faq .qa__mark {
  position: relative;
  width: 14px;
  height: 14px;
  margin-top: 5px;
  flex: 0 0 auto;
}

.page-faq .qa__mark::before,
.page-faq .qa__mark::after {
  content: "";
  position: absolute;
  background: var(--cyan);
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}

.page-faq .qa__mark::before {
  left: 0;
  top: 6px;
  width: 14px;
  height: 2px;
}

.page-faq .qa__mark::after {
  left: 6px;
  top: 0;
  width: 2px;
  height: 14px;
}

.page-faq .qa[open] .qa__mark::after {
  transform: scaleY(0);
  opacity: 0;
}

.page-faq .qa[open] .qa__text {
  color: var(--cyan);
}

.page-faq .qa__a {
  padding: 0 0 20px;
  max-width: 70ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--paper);
}

.page-faq .qa__a p {
  margin: 0 0 10px;
}

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

.page-faq .qa__a strong {
  color: var(--white);
  font-weight: 600;
}

.page-faq .qa__steps {
  list-style: none;
  counter-reset: qa-step;
  margin: 12px 0 0;
  padding: 0;
  display: grid;
  gap: 9px;
}

.page-faq .qa__steps li {
  counter-increment: qa-step;
  position: relative;
  padding-left: 32px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
}

.page-faq .qa__steps li::before {
  content: counter(qa-step, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 2px;
  width: 22px;
  height: 18px;
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--blue);
  border: 1px solid var(--line-strong);
}

.page-faq .qa__path {
  display: inline-block;
  margin: 4px 0 10px;
  padding: 7px 12px;
  border-left: 2px solid var(--cyan);
  background: rgba(47, 243, 208, .07);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  color: var(--cyan);
  max-width: 100%;
  overflow-wrap: anywhere;
}

/* 延伸入口 */
.page-faq .faq-next {
  margin-top: clamp(6px, 2vw, 16px);
  padding-top: clamp(20px, 3vw, 28px);
  border-top: 1px solid var(--line-strong);
}

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

@media (min-width: 700px) {
  .page-faq .faq-next__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.page-faq .faq-next__link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 15px 16px;
  border: 1px solid var(--line);
  background: var(--pitch-2);
  font-size: 14px;
  line-height: 1.5;
  color: var(--white);
  text-decoration: none;
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-faq .faq-next__link span:last-child {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  color: var(--cyan);
}

.page-faq .faq-next__link:hover,
.page-faq .faq-next__link:focus-visible {
  border-color: var(--cyan);
  background: var(--pitch-3);
}

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