.page-faq {
  --faq-cut: 18px;
  --faq-gap: clamp(28px, 5vw, 64px);
  background: var(--fog);
  color: var(--ink);
  overflow-x: clip;
}

.page-faq .breadcrumbs {
  padding: 18px var(--gutter) 0;
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--slate);
}

.page-faq .breadcrumbs a {
  color: var(--jade);
  text-decoration: none;
}

.page-faq .breadcrumbs a:hover,
.page-faq .breadcrumbs a:focus-visible {
  text-decoration: underline;
}

/* 首屏 */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(24px, 4vw, 48px) 0 clamp(32px, 5vw, 60px);
  background:
    radial-gradient(120% 90% at 88% 0%, rgba(31, 138, 122, .16), transparent 62%),
    linear-gradient(165deg, var(--mist) 0%, var(--fog) 74%);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  right: -20%;
  top: -34%;
  width: 58%;
  height: 176%;
  background: linear-gradient(180deg, rgba(216, 165, 74, .22), rgba(31, 138, 122, .10));
  transform: rotate(9deg);
  pointer-events: none;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: var(--gutter);
  bottom: 16px;
  width: 88px;
  height: 5px;
  background: var(--cinnabar);
  transform: skewX(-24deg);
  pointer-events: none;
}

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

.page-faq .faq-hero .display {
  margin: 0 0 18px;
  font-size: clamp(34px, 7.4vw, 88px);
  line-height: 1.02;
  letter-spacing: -.035em;
  font-weight: 800;
  max-width: 15ch;
}

.page-faq .faq-hero .lede {
  max-width: 46ch;
  color: var(--slate);
  font-size: clamp(16px, 1.6vw, 18px);
  line-height: 1.75;
}

/* 三步路径 */
.page-faq .path-steps {
  list-style: none;
  margin: clamp(26px, 4vw, 40px) 0 clamp(26px, 4vw, 40px);
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-faq .path-step {
  position: relative;
  background: var(--fog);
  padding: 24px 20px 20px;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--faq-cut)), calc(100% - var(--faq-cut)) 100%, 0 100%);
  box-shadow: inset 0 3px 0 0 var(--jade);
  transition: transform .25s var(--ease), box-shadow .25s var(--ease);
}

.page-faq .path-step:hover {
  transform: translateY(-2px);
  box-shadow: inset 0 3px 0 0 var(--gold);
}

.page-faq .path-step__index {
  display: inline-block;
  font-size: 13px;
  letter-spacing: .16em;
  color: var(--jade);
}

.page-faq .path-step__title {
  margin: 8px 0 8px;
  font-size: clamp(19px, 2vw, 23px);
  font-weight: 700;
  line-height: 1.25;
}

.page-faq .path-step p {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--slate);
}

.page-faq .path-step__link {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--ink);
  text-decoration: none;
  border-bottom: 2px solid var(--gold);
  padding-bottom: 2px;
}

.page-faq .path-step__link:hover,
.page-faq .path-step__link:focus-visible {
  border-bottom-color: var(--cinnabar);
}

/* 图片容器 */
.page-faq .media-frame {
  margin: 0;
}

.page-faq .media-frame img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  background: var(--board);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
}

.page-faq .media-frame__cap {
  margin-top: 10px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--slate);
  letter-spacing: .02em;
}

/* 通用区块 */
.page-faq .faq-section {
  padding: clamp(40px, 6vw, 84px) 0;
}

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

.page-faq .faq-section .section-head {
  margin-bottom: clamp(22px, 3vw, 36px);
}

.page-faq .section-head__lede {
  max-width: 56ch;
  margin: 12px 0 0;
  color: var(--slate);
  font-size: 16px;
  line-height: 1.75;
}

.page-faq .split {
  display: grid;
  gap: var(--faq-gap);
}

.page-faq .split__lede {
  font-size: clamp(16px, 1.5vw, 18px);
  line-height: 1.75;
  margin: 0 0 14px;
}

.page-faq .split__body p,
.page-faq .split__aside p {
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--ink);
  margin: 0 0 14px;
}

.page-faq .split__body a,
.page-faq .split__aside a,
.page-faq .device-tail a,
.page-faq .qa-a a {
  color: var(--jade);
  text-decoration: none;
  border-bottom: 1px solid rgba(31, 138, 122, .4);
}

.page-faq .split__body a:hover,
.page-faq .split__aside a:hover,
.page-faq .device-tail a:hover,
.page-faq .qa-a a:hover {
  border-bottom-color: var(--cinnabar);
}

.page-faq .aside-note {
  margin: 12px 0 0;
  font-size: 13px;
  color: var(--slate);
  line-height: 1.6;
  padding-left: 12px;
  border-left: 2px solid var(--gold);
}

/* 导航树 */
.page-faq .nav-tree {
  display: grid;
  gap: 10px;
  margin-top: 18px;
}

.page-faq .nav-group {
  background: var(--fog);
  border-left: 3px solid var(--board);
  padding: 4px 4px 4px 14px;
  transition: border-color .2s var(--ease), background .2s var(--ease);
}

.page-faq .nav-group[open] {
  border-left-color: var(--jade);
  background: var(--mist);
}

.page-faq .nav-group summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 11px 8px 11px 0;
  cursor: pointer;
  font-weight: 700;
  font-size: 16px;
  list-style: none;
}

.page-faq .nav-group summary::-webkit-details-marker {
  display: none;
}

.page-faq .nav-group__sign {
  position: relative;
  width: 14px;
  height: 14px;
  flex: 0 0 14px;
}

.page-faq .nav-group__sign::before,
.page-faq .nav-group__sign::after {
  content: "";
  position: absolute;
  background: var(--jade);
  border-radius: 1px;
  transition: transform .22s var(--ease);
}

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

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

.page-faq .nav-group[open] .nav-group__sign::after {
  transform: scaleY(0);
}

.page-faq .nav-group ul {
  list-style: none;
  margin: 0 0 8px;
  padding: 4px 0 4px 14px;
  border-left: 1px dashed var(--board);
  display: grid;
  gap: 6px;
}

.page-faq .nav-group li {
  font-size: 14px;
  line-height: 1.6;
  color: var(--night);
  letter-spacing: .01em;
}

/* 设备对照 */
.page-faq .device-grid {
  display: grid;
  gap: 14px;
}

.page-faq .device-card {
  background: var(--fog);
  padding: 22px 20px;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--faq-cut)), calc(100% - var(--faq-cut)) 100%, 0 100%);
  box-shadow: inset 0 0 0 1px var(--board);
}

.page-faq .device-card__key {
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--jade);
  margin: 0 0 8px;
}

.page-faq .device-card h3 {
  margin: 0 0 10px;
  font-size: clamp(19px, 2vw, 22px);
  font-weight: 700;
}

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

.page-faq .device-tail {
  margin: clamp(20px, 3vw, 28px) 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink);
  max-width: 60ch;
}

/* 批次与公告 */
.page-faq .batch-card {
  background: var(--night);
  color: var(--fog);
  padding: 26px 22px;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 24px), calc(100% - 24px) 100%, 0 100%);
}

.page-faq .batch-card__title {
  margin: 0 0 12px;
  font-size: clamp(20px, 2.2vw, 24px);
  font-weight: 700;
  color: var(--fog);
}

.page-faq .batch-card p {
  color: rgba(244, 248, 247, .82);
  font-size: 15px;
  line-height: 1.75;
  margin: 0 0 14px;
}

.page-faq .batch-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 16px;
}

.page-faq .batch-chip {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .06em;
  padding: 5px 10px;
  color: var(--ink);
  background: var(--glow);
  clip-path: polygon(6px 0, 100% 0, 100% calc(100% - 6px), calc(100% - 6px) 100%, 0 100%, 0 6px);
}

.page-faq .batch-body__title {
  margin: 0 0 12px;
  font-size: clamp(20px, 2.2vw, 24px);
  font-weight: 700;
}

/* 问答 */
.page-faq .qa-layout {
  display: grid;
  gap: clamp(22px, 3vw, 40px);
}

.page-faq .qa-toc {
  background: var(--fog);
  padding: 18px 18px 20px;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 16px), calc(100% - 16px) 100%, 0 100%);
  box-shadow: inset 3px 0 0 0 var(--gold);
}

.page-faq .qa-toc__title {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--slate);
}

.page-faq .qa-toc ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-faq .qa-toc a {
  display: block;
  font-size: 14px;
  line-height: 1.5;
  color: var(--night);
  text-decoration: none;
  padding: 4px 0 4px 10px;
  border-left: 2px solid transparent;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.page-faq .qa-toc a:hover,
.page-faq .qa-toc a:focus-visible {
  color: var(--jade);
  border-left-color: var(--jade);
}

.page-faq .qa-list {
  display: grid;
  gap: 12px;
}

.page-faq .qa-item {
  background: var(--fog);
  position: relative;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%);
  box-shadow: inset 0 0 0 1px var(--board);
  transition: box-shadow .2s var(--ease);
}

.page-faq .qa-item[open] {
  box-shadow: inset 0 0 0 1px var(--jade);
}

.page-faq .qa-item summary {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 18px 44px 18px 18px;
  cursor: pointer;
  list-style: none;
  position: relative;
}

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

.page-faq .qa-item summary::after {
  content: "+";
  position: absolute;
  right: 18px;
  top: 14px;
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1;
  color: var(--jade);
}

.page-faq .qa-item[open] summary::after {
  content: "−";
  color: var(--cinnabar);
}

.page-faq .qa-num {
  font-size: 13px;
  letter-spacing: .12em;
  color: var(--gold);
  flex: 0 0 auto;
}

.page-faq .qa-q {
  font-size: clamp(15.5px, 1.6vw, 17px);
  font-weight: 700;
  line-height: 1.55;
}

.page-faq .qa-a {
  padding: 0 18px 20px 43px;
  border-top: 1px solid var(--board);
  margin-top: 0;
  padding-top: 14px;
}

.page-faq .qa-a p {
  margin: 0 0 12px;
  font-size: 15px;
  line-height: 1.78;
  color: var(--slate);
}

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

.page-faq .qa-a .batch-chip {
  margin: 0 2px;
}

/* 延伸 */
.page-faq .faq-next {
  padding: clamp(36px, 5vw, 72px) 0 clamp(44px, 6vw, 80px);
  background: linear-gradient(180deg, var(--fog), var(--mist));
}

.page-faq .faq-next__title {
  margin: 0 0 clamp(20px, 3vw, 30px);
  font-size: clamp(24px, 3.4vw, 40px);
  font-weight: 700;
  line-height: 1.15;
}

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

.page-faq .next-links a {
  display: grid;
  gap: 6px;
  padding: 18px 20px;
  background: var(--fog);
  text-decoration: none;
  color: var(--ink);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 16px), calc(100% - 16px) 100%, 0 100%);
  box-shadow: inset 0 0 0 1px var(--board);
  transition: transform .22s var(--ease), box-shadow .22s var(--ease);
}

.page-faq .next-links a:hover,
.page-faq .next-links a:focus-visible {
  transform: translateY(-2px);
  box-shadow: inset 0 0 0 1px var(--gold);
}

.page-faq .next-links__k {
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--jade);
}

.page-faq .next-links__v {
  font-size: 15px;
  line-height: 1.6;
  color: var(--night);
}

/* 响应式 */
@media (min-width: 700px) {
  .page-faq .path-steps {
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
  }

  .page-faq .device-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
  }

  .page-faq .next-links {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 960px) {
  .page-faq .split--nav {
    grid-template-columns: 7fr 5fr;
    align-items: start;
  }

  .page-faq .split--batch {
    grid-template-columns: 5fr 7fr;
    align-items: start;
  }

  .page-faq .faq-hero .display {
    max-width: 13ch;
  }

  .page-faq .qa-layout {
    grid-template-columns: 240px 1fr;
    align-items: start;
  }

  .page-faq .qa-toc {
    position: sticky;
    top: 24px;
  }

  .page-faq .next-links {
    grid-template-columns: repeat(4, 1fr);
  }
}

@media (min-width: 1200px) {
  .page-faq .faq-hero {
    padding-top: clamp(36px, 4vw, 56px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .path-step,
  .page-faq .next-links a,
  .page-faq .nav-group__sign::before,
  .page-faq .nav-group__sign::after {
    transition: none;
  }

  .page-faq .path-step:hover,
  .page-faq .next-links a:hover {
    transform: none;
  }
}
<<<END>>>