.page-faq .breadcrumb {
  padding-top: 20px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--slate-mute);
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.page-faq .breadcrumb a {
  color: var(--slate-mute);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

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

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  display: grid;
  gap: 32px;
  padding: 28px 0 8px;
}

.page-faq .faq-hero__text .eyebrow {
  display: block;
  margin-bottom: 14px;
}

.page-faq .faq-hero__text h1 {
  margin: 0 0 20px;
}

.page-faq .faq-hero__text .lede {
  margin: 0 0 28px;
  color: var(--slate-mute);
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-faq .faq-hero__visual {
  margin: 0;
  position: relative;
  border: 1px solid var(--hairline);
  background: var(--deep-indigo);
  overflow: hidden;
}

.page-faq .faq-hero__visual::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(160deg, rgba(53, 230, 210, .16), rgba(7, 10, 24, 0) 58%);
  pointer-events: none;
}

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

/* ---------- 索引 + 问答流 ---------- */
.page-faq .faq-board__inner {
  display: grid;
  gap: 32px;
}

.page-faq .faq-index {
  border-left: 1px solid var(--hairline);
}

.page-faq .faq-index__title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--signal-cyan);
  text-transform: uppercase;
}

.page-faq .faq-index__list {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 18px;
}

.page-faq .faq-index__link {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 6px 0;
  font-size: 14px;
  color: var(--slate-mute);
  text-decoration: none;
  transition: color .2s var(--ease);
}

.page-faq .faq-index__link::before {
  content: "";
  display: block;
  width: 10px;
  height: 1px;
  background: var(--hairline);
  transition: width .24s var(--ease), background .24s var(--ease);
}

.page-faq .faq-index__link:hover {
  color: var(--paper-white);
}

.page-faq .faq-index__link[data-active] {
  color: var(--signal-cyan);
}

.page-faq .faq-index__link[data-active]::before {
  width: 26px;
  background: var(--signal-cyan);
}

.page-faq .faq-index__num {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--cyan-deep);
}

.page-faq .faq-index__link[data-active] .faq-index__num {
  color: var(--signal-cyan);
}

/* ---------- 过滤 ---------- */
.page-faq .faq-filter {
  margin-bottom: 28px;
  padding: 16px;
  border: 1px solid var(--hairline);
  background: var(--glass-indigo);
  backdrop-filter: blur(8px);
}

.page-faq .faq-filter__label {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--slate-mute);
}

.page-faq .faq-filter__input {
  width: 100%;
  box-sizing: border-box;
  padding: 12px 14px;
  background: var(--void-indigo);
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  color: var(--paper-white);
  font-family: var(--font-mono);
  font-size: 14px;
  transition: border-color .2s var(--ease), box-shadow .2s var(--ease);
}

.page-faq .faq-filter__input::placeholder {
  color: var(--slate-mute);
  opacity: .7;
}

.page-faq .faq-filter__input:focus {
  outline: none;
  border-color: var(--signal-cyan);
  box-shadow: 0 0 0 2px rgba(53, 230, 210, .18);
}

.page-faq .faq-filter__empty {
  margin: 12px 0 0;
  font-size: 14px;
  color: var(--alert-rose);
}

/* ---------- 分组 ---------- */
.page-faq .faq-group {
  scroll-margin-top: calc(var(--header-h) + 24px);
  margin-bottom: 44px;
}

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

.page-faq .faq-group__head {
  margin-bottom: 18px;
}

.page-faq .faq-group__head .exhibit-label {
  margin-bottom: 12px;
}

.page-faq .faq-group__head h2 {
  margin: 0;
}

/* ---------- 折叠问答 ---------- */
.page-faq .accordion-item {
  position: relative;
  border: 1px solid var(--hairline);
  border-bottom: none;
  background: var(--deep-indigo);
}

.page-faq .accordion-item:last-child {
  border-bottom: 1px solid var(--hairline);
}

.page-faq .accordion-item::before {
  content: "";
  position: absolute;
  left: -1px;
  top: -1px;
  bottom: -1px;
  width: 2px;
  background: var(--signal-cyan);
  transform: scaleY(0);
  transform-origin: top center;
  transition: transform .26s var(--ease);
  pointer-events: none;
}

.page-faq .accordion-item:hover::before,
.page-faq .accordion-item[data-open]::before {
  transform: scaleY(1);
}

.page-faq .accordion-trigger {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  width: 100%;
  box-sizing: border-box;
  padding: 18px 18px;
  background: transparent;
  border: none;
  text-align: left;
  cursor: pointer;
  color: var(--paper-white);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  transition: color .2s var(--ease), background .2s var(--ease);
}

.page-faq .accordion-trigger:hover {
  background: rgba(53, 230, 210, .05);
}

.page-faq .accordion-trigger:focus-visible {
  outline: 2px solid var(--signal-cyan);
  outline-offset: -2px;
}

.page-faq .faq-q__num {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.9;
  color: var(--cyan-deep);
  transition: color .2s var(--ease);
}

.page-faq .accordion-item[data-open] .faq-q__num {
  color: var(--pulse-orange);
}

.page-faq .faq-q__text {
  flex: 1 1 auto;
}

.page-faq .accordion-panel {
  padding: 0 18px 0 46px;
  max-height: 40rem;
  overflow: hidden;
  opacity: 1;
  transition: max-height .32s var(--ease), opacity .32s var(--ease),
              padding .32s var(--ease);
}

.page-faq .accordion-item:not([data-open]) .accordion-panel {
  max-height: 0;
  opacity: 0;
  padding-top: 0;
  padding-bottom: 0;
}

.page-faq .accordion-panel p {
  margin: 0 0 12px;
  max-width: 34em;
  font-size: 14px;
  line-height: 1.75;
  color: var(--slate-mute);
}

.page-faq .accordion-panel .link-arrow {
  display: inline-block;
  margin-bottom: 20px;
  font-size: 13px;
}

.page-faq .tier-strip {
  margin: 4px 0 20px;
  flex-wrap: wrap;
}

.page-faq .accordion-item[hidden] {
  display: none;
}

/* ---------- 小屏端反馈 ---------- */
.page-faq .faq-mobile {
  position: relative;
}

.page-faq .faq-mobile::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, var(--signal-cyan), rgba(53, 230, 210, 0));
}

.page-faq .faq-mobile__inner {
  display: grid;
  gap: 40px;
}

.page-faq .faq-mobile__text .exhibit-label {
  margin-bottom: 16px;
}

.page-faq .faq-mobile__text h2 {
  margin: 0 0 18px;
}

.page-faq .faq-mobile__text .prose {
  margin: 0 0 32px;
  color: var(--slate-mute);
}

.page-faq .faq-steps {
  list-style: none;
  margin: 0 0 32px;
  padding: 0;
  border-top: 1px solid var(--hairline);
}

.page-faq .faq-step {
  display: flex;
  gap: 16px;
  padding: 18px 0;
  border-bottom: 1px solid var(--hairline);
}

.page-faq .faq-step__idx {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border: 2px solid var(--signal-cyan);
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--signal-cyan);
}

.page-faq .faq-step__title {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  color: var(--paper-white);
}

.page-faq .faq-step__body p {
  margin: 0;
  max-width: 32em;
  font-size: 14px;
  line-height: 1.7;
  color: var(--slate-mute);
}

.page-faq .faq-mobile__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-faq .faq-mobile__visual {
  margin: 0;
  align-self: start;
}

.page-faq .faq-mobile__visual img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--hairline);
  background: var(--deep-indigo);
  object-fit: cover;
}

.page-faq .faq-mobile__visual figcaption {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--slate-mute);
}

/* ---------- 处理节奏 ---------- */
.page-faq .faq-sla__head {
  margin-bottom: 32px;
}

.page-faq .faq-sla__head .eyebrow {
  display: block;
  margin-bottom: 12px;
}

.page-faq .faq-sla__head h2 {
  margin: 0;
}

.page-faq .faq-sla__grid {
  display: grid;
  gap: 16px;
  margin-bottom: 32px;
}

.page-faq .faq-sla__card {
  padding: 24px 20px;
  border-left: 2px solid var(--pulse-orange);
}

.page-faq .faq-sla__figure {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 28px;
  font-weight: 700;
  color: var(--paper-white);
  letter-spacing: -.01em;
}

.page-faq .faq-sla__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  color: var(--signal-cyan);
}

.page-faq .faq-sla__card p:last-child {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--slate-mute);
}

.page-faq .faq-sla__foot {
  display: grid;
  gap: 16px;
  padding-top: 24px;
  border-top: 1px solid var(--hairline);
}

.page-faq .faq-sla__foot .prose {
  margin: 0;
  font-size: 14px;
  color: var(--slate-mute);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-sla__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }

  .page-faq .faq-sla__foot {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }

  .page-faq .faq-mobile__inner {
    grid-template-columns: minmax(0, 1fr) minmax(0, 320px);
    gap: 48px;
    align-items: start;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: 56px;
    align-items: end;
    padding: 56px 0 16px;
  }

  .page-faq .faq-hero__text h1 {
    font-size: 64px;
    line-height: 1.04;
  }

  .page-faq .faq-board__inner {
    grid-template-columns: 232px minmax(0, 1fr);
    gap: 56px;
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--header-h) + 28px);
  }

  .page-faq .faq-index__list {
    flex-direction: column;
    gap: 2px;
  }

  .page-faq .faq-index__link {
    width: 100%;
  }

  .page-faq .faq-group {
    margin-bottom: 64px;
  }

  .page-faq .accordion-trigger {
    padding: 22px 24px;
    font-size: 17px;
  }

  .page-faq .accordion-panel {
    padding-left: 58px;
    padding-right: 24px;
  }
}

@media (min-width: 1200px) {
  .page-faq .faq-mobile__inner {
    grid-template-columns: minmax(0, 8fr) minmax(0, 4fr);
  }

  .page-faq .faq-hero__text h1 {
    font-size: 76px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .accordion-item::before,
  .page-faq .faq-index__link::before,
  .page-faq .accordion-panel,
  .page-faq .faq-filter__input {
    transition: none;
  }
}