.page-faq {
  --faq-rail-w: 300px;
  --faq-gap: 56px;
  --faq-shadow: 0 22px 44px -28px rgba(0, 0, 0, .9);
  color: var(--fog);
  font-family: var(--font-body);
  line-height: 1.85;
  overflow-x: hidden;
}

.page-faq a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(59, 240, 220, .35);
  transition: border-color 180ms var(--ease), color 180ms var(--ease);
}

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

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

/* ---------- 面包屑 ---------- */
.page-faq .crumbs {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 22px 20px 0;
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--steel);
  text-transform: uppercase;
}

.page-faq .crumbs a {
  color: var(--steel);
  border-bottom-color: transparent;
}

.page-faq .crumbs a:hover {
  color: var(--cyan);
}

.page-faq .crumbs__sep {
  color: var(--line);
}

/* ---------- 章节色带 ---------- */
.page-faq .chapter-band {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 10px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--steel);
}

.page-faq .chapter-band__no {
  display: inline-block;
  padding: 3px 9px;
  background: var(--cyan);
  color: var(--ink);
  font-weight: 700;
  border-radius: 2px;
  letter-spacing: .08em;
}

.page-faq .chapter-band__name {
  color: var(--fog);
  font-weight: 700;
}

.page-faq .chapter-band__time {
  margin-left: auto;
  color: var(--steel);
  white-space: nowrap;
}

/* ---------- 容器 ---------- */
.page-faq .section {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 34px 20px 0;
}

.page-faq .faq-panel {
  padding-bottom: 70px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
  padding: 38px 0 6px;
}

.page-faq .faq-hero h1 {
  margin: 0 0 20px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 7.2vw, 58px);
  line-height: 1.06;
  letter-spacing: -.012em;
  color: var(--fog);
  text-wrap: balance;
}

.page-faq .faq-hero__lede {
  margin: 0;
  max-width: 62ch;
  font-size: 16px;
  color: var(--steel);
}

.page-faq .faq-hero__meta {
  margin: 20px 0 0;
  font-family: var(--font-data);
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--steel);
}

.page-faq .faq-hero__side {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  align-self: start;
  background: var(--line);
  border: 1px solid var(--line);
  box-shadow: var(--faq-shadow);
}

.page-faq .hero-fact {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 18px;
  background: var(--panel);
}

.page-faq .hero-fact__k {
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--steel);
}

.page-faq .hero-fact__v {
  font-family: var(--font-data);
  font-size: clamp(17px, 4.4vw, 24px);
  font-weight: 700;
  line-height: 1.2;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

/* ---------- 筛选 ---------- */
.page-faq .faq-shell {
  position: relative;
  margin-top: 26px;
}

.page-faq .faq-sel {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  border: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
}

.page-faq .faq-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 20px 0 26px;
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .faq-chip {
  display: inline-flex;
  align-items: center;
  padding: 8px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  color: var(--steel);
  font-family: var(--font-data);
  font-size: 13px;
  letter-spacing: .04em;
  cursor: pointer;
  user-select: none;
  transition: color 180ms var(--ease), border-color 180ms var(--ease), background 180ms var(--ease);
}

.page-faq .faq-chip:hover {
  color: var(--fog);
  border-color: var(--cyan);
}

.page-faq #fc-all:checked ~ .faq-filter label[for="fc-all"],
.page-faq #fc-login:checked ~ .faq-filter label[for="fc-login"],
.page-faq #fc-find:checked ~ .faq-filter label[for="fc-find"],
.page-faq #fc-field:checked ~ .faq-filter label[for="fc-field"],
.page-faq #fc-account:checked ~ .faq-filter label[for="fc-account"],
.page-faq #fc-help:checked ~ .faq-filter label[for="fc-help"] {
  background: var(--cyan);
  border-color: var(--cyan);
  color: var(--ink);
  font-weight: 700;
}

.page-faq #fc-login:checked ~ .faq-layout .faq-group:not([data-cat="login"]),
.page-faq #fc-login:checked ~ .faq-layout .rail-item:not([data-cat="login"]),
.page-faq #fc-find:checked ~ .faq-layout .faq-group:not([data-cat="find"]),
.page-faq #fc-find:checked ~ .faq-layout .rail-item:not([data-cat="find"]),
.page-faq #fc-field:checked ~ .faq-layout .faq-group:not([data-cat="field"]),
.page-faq #fc-field:checked ~ .faq-layout .rail-item:not([data-cat="field"]),
.page-faq #fc-account:checked ~ .faq-layout .faq-group:not([data-cat="account"]),
.page-faq #fc-account:checked ~ .faq-layout .rail-item:not([data-cat="account"]),
.page-faq #fc-help:checked ~ .faq-layout .faq-group:not([data-cat="help"]),
.page-faq #fc-help:checked ~ .faq-layout .rail-item:not([data-cat="help"]) {
  display: none;
}

/* ---------- 双栏骨架 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 34px;
  padding-top: 34px;
}

/* ---------- 左侧索引 ---------- */
.page-faq .faq-rail {
  align-self: start;
}

.page-faq .faq-rail__title {
  margin: 0 0 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--steel);
}

.page-faq .faq-rail__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.page-faq .rail-item a {
  display: block;
  padding: 9px 12px 9px 14px;
  border-left: 2px solid var(--line);
  border-bottom: 0;
  font-size: 14px;
  line-height: 1.55;
  color: var(--steel);
  transition: color 180ms var(--ease), border-color 180ms var(--ease), background 180ms var(--ease);
}

.page-faq .rail-item a:hover,
.page-faq .rail-item a:focus-visible {
  color: var(--cyan);
  border-left-color: var(--cyan);
  background: rgba(59, 240, 220, .07);
}

/* ---------- 问答条目 ---------- */
.page-faq .faq-group {
  margin: 0 0 58px;
}

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

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 14px;
  margin-bottom: 4px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-group__no {
  font-family: var(--font-data);
  font-size: 13px;
  letter-spacing: .12em;
  color: var(--amber);
}

.page-faq .faq-group h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(21px, 4.6vw, 30px);
  line-height: 1.14;
  letter-spacing: -.006em;
  color: var(--fog);
}

.page-faq .faq-group__intro {
  margin: 16px 0 4px;
  font-size: 14px;
  color: var(--steel);
}

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

.page-faq .qa > summary {
  position: relative;
  display: block;
  padding: 17px 38px 17px 0;
  cursor: pointer;
  list-style: none;
  font-size: 16px;
  font-weight: 500;
  line-height: 1.6;
  color: var(--fog);
  transition: color 180ms var(--ease);
}

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

.page-faq .qa > summary::marker {
  content: "";
}

.page-faq .qa > summary::after {
  content: "";
  position: absolute;
  right: 10px;
  top: 50%;
  width: 8px;
  height: 8px;
  border-right: 2px solid var(--cyan);
  border-bottom: 2px solid var(--cyan);
  transform: translateY(-72%) rotate(45deg);
  transition: transform 200ms var(--ease);
}

.page-faq .qa[open] > summary::after {
  transform: translateY(-28%) rotate(-135deg);
}

.page-faq .qa > summary:hover {
  color: var(--cyan);
}

.page-faq .qa > summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
  border-radius: 2px;
}

.page-faq .qa__body {
  padding: 0 0 22px;
}

.page-faq .qa__act {
  display: inline-block;
  margin: 0 0 12px;
  padding-bottom: 5px;
  border-bottom: 1px solid rgba(59, 240, 220, .45);
  font-family: var(--font-data);
  font-size: 13px;
  letter-spacing: .03em;
  line-height: 1.6;
  color: var(--cyan);
}

.page-faq .qa__body p {
  margin: 0;
  max-width: 66ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--steel);
}

/* ---------- 图片 ---------- */
.page-faq .faq-fig {
  margin: 26px 0 0;
  border: 1px solid var(--line);
  background: var(--panel);
  box-shadow: var(--faq-shadow);
}

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

.page-faq .faq-fig--wide {
  border-color: rgba(154, 107, 255, .38);
}

.page-faq .faq-fig .media__caption {
  display: block;
  padding: 12px 16px;
  border-top: 1px solid var(--line);
  font-size: 13px;
  line-height: 1.7;
  color: var(--steel);
}

/* ---------- 滚动显现 ---------- */
.page-faq [data-reveal] {
  transition: opacity 320ms var(--ease), transform 320ms var(--ease);
}

.page-faq [data-reveal].is-in {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  .page-faq [data-reveal],
  .page-faq .qa > summary::after,
  .page-faq .faq-chip,
  .page-faq .rail-item a {
    transition: none;
  }

  .page-faq [data-reveal] {
    opacity: 1;
    transform: none;
  }
}

/* ---------- 平板 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-hero__side {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .hero-fact {
    padding: 18px 16px;
  }

  .page-faq .faq-filter {
    gap: 10px;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 960px) {
  .page-faq .section {
    padding: 44px 32px 0;
  }

  .page-faq .crumbs {
    padding: 28px 32px 0;
  }

  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: var(--faq-gap);
    padding: 60px 0 14px;
  }

  .page-faq .faq-hero__lede {
    font-size: 18px;
  }

  .page-faq .faq-shell {
    margin-top: 32px;
  }

  .page-faq .faq-filter {
    padding: 22px 0 30px;
  }

  .page-faq .faq-layout {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
    gap: var(--faq-gap);
    padding-top: 44px;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: 96px;
    max-height: calc(100vh - 130px);
    overflow-y: auto;
    padding-right: 4px;
  }

  .page-faq .faq-panel {
    padding-bottom: 96px;
  }

  .page-faq .qa > summary {
    font-size: 17px;
    padding: 19px 42px 19px 0;
  }

  .page-faq .qa__body p {
    font-size: 15.5px;
  }
}

@media (min-width: 1200px) {
  .page-faq {
    --faq-rail-w: 320px;
    --faq-gap: 72px;
  }
}
<<<END>>>