.page-faq {
  --faq-rail-top: calc(var(--header-h) + 28px);
  color: var(--ice);
  background: var(--abyss);
  overflow-x: hidden;
}

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

.page-faq .breadcrumbs a {
  color: var(--steel);
  text-decoration: none;
  transition: color .2s var(--ease);
}

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

.page-faq .breadcrumbs span {
  margin: 0 6px;
  color: var(--line);
}

/* 首屏 */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  margin-top: 14px;
  padding: 26px 0 34px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(760px 360px at 96% -20%, rgba(25, 227, 208, .18), transparent 62%),
    linear-gradient(160deg, var(--tactical) 0%, var(--abyss) 78%);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(90deg, rgba(25, 227, 208, .055) 0 1px, transparent 1px 92px),
    linear-gradient(112deg, transparent 0 58%, rgba(245, 165, 36, .1) 58% 58.6%, transparent 58.6%);
  pointer-events: none;
}

.page-faq .faq-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 26px;
}

.page-faq .faq-hero__copy h1 {
  margin: 12px 0 0;
  font-size: clamp(27px, 7.2vw, 42px);
  line-height: 1.12;
  font-weight: 900;
  letter-spacing: -.02em;
  color: var(--ice);
}

.page-faq .faq-hero__lead {
  margin: 16px 0 0;
  max-width: 56ch;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--ice);
  opacity: .86;
}

.page-faq .faq-hero__note {
  display: flex;
  gap: 10px;
  align-items: baseline;
  margin: 18px 0 0;
  padding: 9px 12px;
  border: 1px solid var(--line);
  border-left: 2px solid var(--cyan);
  background: rgba(11, 43, 69, .72);
  font-size: 13px;
  line-height: 1.65;
  color: var(--ice);
}

.page-faq .faq-hero__note .mono {
  flex: none;
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--amber);
}

.page-faq .faq-hero__figure {
  margin: 0;
}

/* 分栏骨架 */
.page-faq .faq-split {
  display: grid;
  gap: 26px;
  padding: 30px 0 60px;
}

.page-faq .faq-groups {
  min-width: 0;
}

/* 左侧索引轨道 */
.page-faq .faq-rail {
  border-top: 2px solid var(--cyan);
  padding-top: 14px;
  min-width: 0;
}

.page-faq .faq-rail__list {
  display: flex;
  gap: 8px;
  margin: 12px 0 0;
  padding: 0 0 8px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-faq .faq-rail__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  white-space: nowrap;
  font-size: 13px;
  color: var(--ice);
  text-decoration: none;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--tactical);
  transition: color .2s var(--ease), border-color .2s var(--ease), background .2s var(--ease);
}

.page-faq .faq-rail__idx {
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--cyan);
}

.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible {
  color: var(--amber);
  border-color: var(--amber);
  background: rgba(245, 165, 36, .12);
}

.page-faq .faq-rail__note {
  display: none;
  margin: 18px 0 0;
  padding-top: 14px;
  border-top: 1px dashed var(--line);
  font-size: 13px;
  line-height: 1.75;
  color: var(--steel);
}

/* 问题分组 */
.page-faq .faq-group {
  padding: 22px 0 24px;
  border-top: 1px solid var(--line);
  scroll-margin-top: calc(var(--header-h) + 24px);
}

.page-faq .faq-group:first-child {
  border-top-color: var(--cyan);
}

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
}

.page-faq .faq-group__head .section-num {
  flex: none;
  font-size: 24px;
  line-height: 1;
}

.page-faq .faq-group__head h2 {
  margin: 0;
  font-size: clamp(19px, 4.4vw, 24px);
  line-height: 1.3;
  font-weight: 900;
  letter-spacing: -.01em;
  color: var(--ice);
}

.page-faq .faq-group__intro {
  margin: 10px 0 16px;
  max-width: 62ch;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--steel);
}

/* 手风琴 */
.page-faq .qa {
  margin-bottom: 10px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--line);
  background: var(--tactical);
  transition: border-color .22s var(--ease), background .22s var(--ease);
}

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

.page-faq .qa[open] {
  border-left-color: var(--amber);
  background:
    linear-gradient(90deg, rgba(245, 165, 36, .1), transparent 46%),
    var(--panel);
}

.page-faq .qa__q {
  position: relative;
  display: block;
  padding: 14px 46px 14px 14px;
  list-style: none;
  font-size: 15px;
  font-weight: 700;
  line-height: 1.55;
  color: var(--ice);
  cursor: pointer;
  transition: color .2s var(--ease);
}

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

.page-faq .qa__q::after {
  content: "+";
  position: absolute;
  right: 14px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--cyan);
}

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

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

.page-faq .qa__a {
  margin: 0 14px 15px;
  padding: 12px 0 0;
  border-top: 1px solid rgba(44, 90, 117, .75);
  font-size: 14.5px;
  line-height: 1.82;
  color: var(--ice);
  opacity: .9;
}

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

.page-faq .qa__a a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(25, 227, 208, .45);
}

.page-faq .qa__a a:hover {
  color: var(--amber);
  border-bottom-color: var(--amber);
}

.page-faq .faq-group__back {
  display: inline-block;
  margin-top: 8px;
  padding-bottom: 2px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--steel);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.page-faq .faq-group__back:hover {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

/* 联系卡片 */
.page-faq .faq-contact {
  display: grid;
  gap: 18px;
  margin-top: 18px;
}

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

.page-faq .faq-contact__item {
  padding: 10px 12px;
  border-left: 2px solid var(--cyan);
  background: linear-gradient(90deg, rgba(25, 227, 208, .09), rgba(11, 43, 69, .65) 62%);
}

.page-faq .faq-contact__label {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--steel);
}

.page-faq .faq-contact__value {
  display: block;
  margin-top: 4px;
  font-size: 14.5px;
  line-height: 1.65;
  color: var(--ice);
  word-break: break-word;
}

.page-faq .faq-note {
  margin: 16px 0 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--steel);
}

.page-faq .faq-note a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(25, 227, 208, .45);
}

@media (min-width: 960px) {
  .page-faq .faq-hero {
    padding: 38px 0 46px;
  }

  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr);
    align-items: center;
    gap: 44px;
  }

  .page-faq .faq-hero__copy h1 {
    font-size: clamp(36px, 3.7vw, 56px);
  }

  .page-faq .faq-hero__lead {
    font-size: 17px;
  }

  .page-faq .faq-split {
    grid-template-columns: 258px minmax(0, 1fr);
    gap: 48px;
    padding: 44px 0 80px;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: var(--faq-rail-top);
    align-self: start;
    max-height: calc(100vh - var(--faq-rail-top) - 24px);
    overflow-y: auto;
  }

  .page-faq .faq-rail__list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-rail__link {
    display: flex;
    padding: 9px 10px 9px 12px;
    border: 0;
    border-left: 2px solid transparent;
    border-radius: 0;
    background: none;
    color: var(--steel);
    font-size: 14px;
    white-space: normal;
  }

  .page-faq .faq-rail__link:hover,
  .page-faq .faq-rail__link:focus-visible {
    color: var(--amber);
    border-left-color: var(--amber);
    background: rgba(245, 165, 36, .08);
  }

  .page-faq .faq-rail__note {
    display: block;
  }

  .page-faq .faq-group {
    padding: 28px 0 30px;
  }

  .page-faq .faq-group__head .section-num {
    font-size: 30px;
  }

  .page-faq .qa__q {
    padding: 16px 52px 16px 18px;
    font-size: 16px;
  }

  .page-faq .qa__a {
    margin: 0 18px 18px;
    padding-top: 14px;
    font-size: 15px;
  }
}

@media (min-width: 1180px) {
  .page-faq .faq-contact {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: start;
    gap: 26px;
  }
}
</main>

.page-faq {
  --faq-rail-top: calc(var(--header-h) + 28px);
  color: var(--ice);
  background: var(--abyss);
  overflow-x: hidden;
}

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

.page-faq .breadcrumbs a {
  color: var(--steel);
  text-decoration: none;
  transition: color .2s var(--ease);
}

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

.page-faq .breadcrumbs span {
  margin: 0 6px;
  color: var(--line);
}

.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  margin-top: 14px;
  padding: 26px 0 34px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(760px 360px at 96% -20%, rgba(25, 227, 208, .18), transparent 62%),
    linear-gradient(160deg, var(--tactical) 0%, var(--abyss) 78%);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(90deg, rgba(25, 227, 208, .055) 0 1px, transparent 1px 92px),
    linear-gradient(112deg, transparent 0 58%, rgba(245, 165, 36, .1) 58% 58.6%, transparent 58.6%);
  pointer-events: none;
}

.page-faq .faq-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 26px;
}

.page-faq .faq-hero__copy h1 {
  margin: 12px 0 0;
  font-size: clamp(27px, 7.2vw, 42px);
  line-height: 1.12;
  font-weight: 900;
  letter-spacing: -.02em;
  color: var(--ice);
}

.page-faq .faq-hero__lead {
  margin: 16px 0 0;
  max-width: 56ch;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--ice);
  opacity: .86;
}

.page-faq .faq-hero__note {
  display: flex;
  gap: 10px;
  align-items: baseline;
  margin: 18px 0 0;
  padding: 9px 12px;
  border: 1px solid var(--line);
  border-left: 2px solid var(--cyan);
  background: rgba(11, 43, 69, .72);
  font-size: 13px;
  line-height: 1.65;
  color: var(--ice);
}

.page-faq .faq-hero__note .mono {
  flex: none;
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--amber);
}

.page-faq .faq-hero__figure {
  margin: 0;
}

.page-faq .faq-split {
  display: grid;
  gap: 26px;
  padding: 30px 0 60px;
}

.page-faq .faq-groups {
  min-width: 0;
}

.page-faq .faq-rail {
  min-width: 0;
  padding-top: 14px;
  border-top: 2px solid var(--cyan);
}

.page-faq .faq-rail__list {
  display: flex;
  gap: 8px;
  margin: 12px 0 0;
  padding: 0 0 8px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-faq .faq-rail__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  white-space: nowrap;
  font-size: 13px;
  color: var(--ice);
  text-decoration: none;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--tactical);
  transition: color .2s var(--ease), border-color .2s var(--ease), background .2s var(--ease);
}

.page-faq .faq-rail__idx {
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--cyan);
}

.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible {
  color: var(--amber);
  border-color: var(--amber);
  background: rgba(245, 165, 36, .12);
}

.page-faq .faq-rail__note {
  display: none;
  margin: 18px 0 0;
  padding-top: 14px;
  border-top: 1px dashed var(--line);
  font-size: 13px;
  line-height: 1.75;
  color: var(--steel);
}

.page-faq .faq-group {
  padding: 22px 0 24px;
  border-top: 1px solid var(--line);
  scroll-margin-top: calc(var(--header-h) + 24px);
}

.page-faq .faq-group:first-child {
  border-top-color: var(--cyan);
}

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
}

.page-faq .faq-group__head .section-num {
  flex: none;
  font-size: 24px;
  line-height: 1;
}

.page-faq .faq-group__head h2 {
  margin: 0;
  font-size: clamp(19px, 4.4vw, 24px);
  line-height: 1.3;
  font-weight: 900;
  letter-spacing: -.01em;
  color: var(--ice);
}

.page-faq .faq-group__intro {
  margin: 10px 0 16px;
  max-width: 62ch;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--steel);
}

.page-faq .qa {
  margin-bottom: 10px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--line);
  background: var(--tactical);
  transition: border-color .22s var(--ease), background .22s var(--ease);
}

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

.page-faq .qa[open] {
  border-left-color: var(--amber);
  background:
    linear-gradient(90deg, rgba(245, 165, 36, .1), transparent 46%),
    var(--panel);
}

.page-faq .qa__q {
  position: relative;
  display: block;
  padding: 14px 46px 14px 14px;
  list-style: none;
  font-size: 15px;
  font-weight: 700;
  line-height: 1.55;
  color: var(--ice);
  cursor: pointer;
  transition: color .2s var(--ease);
}

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

.page-faq .qa__q::after {
  content: "+";
  position: absolute;
  right: 14px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--cyan);
}

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

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

.page-faq .qa__a {
  margin: 0 14px 15px;
  padding: 12px 0 0;
  border-top: 1px solid rgba(44, 90, 117, .75);
  font-size: 14.5px;
  line-height: 1.82;
  color: var(--ice);
  opacity: .9;
}

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

.page-faq .qa__a a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(25, 227, 208, .45);
}

.page-faq .qa__a a:hover {
  color: var(--amber);
  border-bottom-color: var(--amber);
}

.page-faq .faq-group__back {
  display: inline-block;
  margin-top: 8px;
  padding-bottom: 2px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--steel);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.page-faq .faq-group__back:hover {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.page-faq .faq-contact {
  display: grid;
  gap: 18px;
  margin-top: 18px;
}

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

.page-faq .faq-contact__item {
  padding: 10px 12px;
  border-left: 2px solid var(--cyan);
  background: linear-gradient(90deg, rgba(25, 227, 208, .09), rgba(11, 43, 69, .65) 62%);
}

.page-faq .faq-contact__label {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--steel);
}

.page-faq .faq-contact__value {
  display: block;
  margin-top: 4px;
  font-size: 14.5px;
  line-height: 1.65;
  color: var(--ice);
  word-break: break-word;
}

.page-faq .faq-note {
  margin: 16px 0 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--steel);
}

.page-faq .faq-note a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(25, 227, 208, .45);
}

@media (min-width: 960px) {
  .page-faq .faq-hero {
    padding: 38px 0 46px;
  }

  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr);
    align-items: center;
    gap: 44px;
  }

  .page-faq .faq-hero__copy h1 {
    font-size: clamp(36px, 3.7vw, 56px);
  }

  .page-faq .faq-hero__lead {
    font-size: 17px;
  }

  .page-faq .faq-split {
    grid-template-columns: 258px minmax(0, 1fr);
    gap: 48px;
    padding: 44px 0 80px;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: var(--faq-rail-top);
    align-self: start;
    max-height: calc(100vh - var(--faq-rail-top) - 24px);
    overflow-y: auto;
  }

  .page-faq .faq-rail__list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-rail__link {
    display: flex;
    padding: 9px 10px 9px 12px;
    border: 0;
    border-left: 2px solid transparent;
    border-radius: 0;
    background: none;
    color: var(--steel);
    font-size: 14px;
    white-space: normal;
  }

  .page-faq .faq-rail__link:hover,
  .page-faq .faq-rail__link:focus-visible {
    color: var(--amber);
    border-left-color: var(--amber);
    background: rgba(245, 165, 36, .08);
  }

  .page-faq .faq-rail__note {
    display: block;
  }

  .page-faq .faq-group {
    padding: 28px 0 30px;
  }

  .page-faq .faq-group__head .section-num {
    font-size: 30px;
  }

  .page-faq .qa__q {
    padding: 16px 52px 16px 18px;
    font-size: 16px;
  }

  .page-faq .qa__a {
    margin: 0 18px 18px;
    padding-top: 14px;
    font-size: 15px;
  }
}

@media (min-width: 1180px) {
  .page-faq .faq-contact {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: start;
    gap: 26px;
  }
}
<<<END>>>