.page-faq {
  --faq-ink-soft: #2C4A41;
  --faq-ink-strong: #16332B;
  padding-bottom: clamp(56px, 8vw, 104px);
}

.page-faq .crumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  max-width: var(--shell-max);
  margin: 0 auto;
  padding: clamp(16px, 3vw, 26px) var(--gutter) 0;
  font-size: var(--fs-caption);
  letter-spacing: .04em;
  color: var(--graphite);
}
.page-faq .crumbs__link {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .2s ease, border-color .2s ease;
}
.page-faq .crumbs__link:hover {
  color: var(--mint);
  border-bottom-color: var(--mint);
}
.page-faq .crumbs__sep {
  color: var(--graphite);
}

/* 首屏 */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(22px, 4vw, 42px) 0 clamp(26px, 4.5vw, 50px);
  overflow: hidden;
}
.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(110% 84% at 84% 0%, rgba(92, 242, 180, .16), transparent 62%),
    linear-gradient(180deg, rgba(18, 43, 36, .95) 0%, rgba(11, 31, 26, 0) 100%);
  clip-path: polygon(0 0, 100% 0, 100% 72%, 0 100%);
  pointer-events: none;
}
.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
}
.page-faq .faq-hero__title {
  margin: 14px 0 0;
  max-width: 22ch;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(30px, 5.2vw, 52px);
  line-height: 1.14;
  letter-spacing: -0.02em;
  color: var(--paper);
}
.page-faq .faq-hero__lede {
  margin: 16px 0 0;
  max-width: 54ch;
  font-size: clamp(15px, 1.5vw, 18px);
  line-height: 1.8;
  color: var(--mist);
}

/* 主题胶囊 */
.page-faq .faq-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: clamp(20px, 3vw, 32px);
}
.page-faq .faq-jump__pill {
  display: inline-flex;
  align-items: center;
  padding: 10px 18px;
  border-radius: 999px;
  border: 1px solid var(--line-strong);
  background: rgba(18, 43, 36, .62);
  color: var(--paper);
  font-size: var(--fs-small);
  text-decoration: none;
  transition: color .2s ease, border-color .2s ease, transform .2s ease;
}
.page-faq .faq-jump__pill:hover {
  color: var(--mint);
  border-color: var(--mint);
  transform: translateY(-2px);
}
.page-faq .faq-jump__pill:focus-visible {
  outline: 2px solid var(--mint);
  outline-offset: 2px;
}

/* 主体三栏 */
.page-faq .faq-body {
  padding-top: clamp(18px, 3.5vw, 34px);
}
.page-faq .faq-body__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 4vw, 34px);
  align-items: start;
}
.page-faq .faq-main {
  display: grid;
  gap: clamp(26px, 4vw, 42px);
  min-width: 0;
}
.page-faq .faq-group,
.page-faq .faq-item,
.page-faq .faq-help {
  scroll-margin-top: 24px;
}

/* 边条 */
.page-faq .faq-rail {
  display: grid;
  gap: 14px;
  min-width: 0;
}
.page-faq .faq-rail__title {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--fs-caption);
  letter-spacing: .1em;
  color: var(--graphite);
}
.page-faq .faq-rail__note {
  margin: 0;
  font-size: var(--fs-caption);
  line-height: 1.7;
  color: var(--graphite);
}
.page-faq .faq-rail__note a {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid var(--line-strong);
  transition: color .2s ease, border-color .2s ease;
}
.page-faq .faq-rail__note a:hover {
  color: var(--mint);
  border-bottom-color: var(--mint);
}

.page-faq .faq-figure {
  margin: 0;
}
.page-faq .faq-figure__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: var(--r-md);
  border: 1px solid var(--line);
  background: var(--ink-700);
  object-fit: cover;
}
.page-faq .figure__caption {
  margin-top: 8px;
  font-size: var(--fs-caption);
  line-height: 1.6;
  color: var(--graphite);
}

.page-faq .faq-rhythm {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}
.page-faq .faq-rhythm li {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 10px 12px;
  border-radius: var(--r-sm);
  border: 1px solid var(--line);
  background: rgba(18, 43, 36, .55);
  font-size: var(--fs-caption);
  line-height: 1.65;
  color: var(--mist);
}
.page-faq .faq-rhythm__num {
  flex: 0 0 auto;
  min-width: 42px;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: var(--fs-small);
  color: var(--mint);
  white-space: nowrap;
}

/* 分组标题 */
.page-faq .faq-group {
  display: grid;
  gap: 10px;
  min-width: 0;
}
.page-faq .faq-group__head {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding-bottom: 4px;
}
.page-faq .faq-group__index {
  flex: 0 0 auto;
  padding-top: 2px;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: var(--fs-h3);
  line-height: 1;
  color: var(--cinnabar);
}
.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(20px, 2.6vw, 28px);
  letter-spacing: -0.01em;
  color: var(--paper);
}
.page-faq .faq-group__desc {
  margin: 6px 0 0;
  font-size: var(--fs-small);
  line-height: 1.7;
  color: var(--graphite);
}

/* 折叠问答 */
.page-faq .faq-item {
  position: relative;
  border-radius: var(--r-md);
  border: 1px solid var(--line);
  background: var(--ink-700);
  overflow: hidden;
  transition: border-color .2s ease, background-color .2s ease;
}
.page-faq .faq-item:hover {
  border-color: var(--line-strong);
}
.page-faq .faq-item[open] {
  border-color: var(--line-strong);
}
.page-faq .faq-item[open]::before {
  content: "";
  position: absolute;
  left: 0;
  top: 16px;
  bottom: 16px;
  width: 3px;
  border-radius: 0 3px 3px 0;
  background: var(--mint);
}
.page-faq .faq-item__q {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
  font-size: clamp(15px, 1.6vw, 17px);
  font-weight: 600;
  line-height: 1.6;
  color: var(--paper);
  transition: color .2s ease;
}
.page-faq .faq-item__q::-webkit-details-marker {
  display: none;
}
.page-faq .faq-item__q:focus-visible {
  outline: 2px solid var(--mint);
  outline-offset: -2px;
}
.page-faq .faq-item__mark {
  position: relative;
  flex: 0 0 auto;
  width: 20px;
  height: 20px;
  margin-top: 3px;
  border-radius: 50%;
  border: 1px solid var(--line-strong);
  transition: border-color .2s ease;
}
.page-faq .faq-item__mark::before,
.page-faq .faq-item__mark::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  background: var(--mist);
  transform: translate(-50%, -50%);
  transition: transform .2s ease, opacity .2s ease, background-color .2s ease;
}
.page-faq .faq-item__mark::before {
  width: 9px;
  height: 1.5px;
}
.page-faq .faq-item__mark::after {
  width: 1.5px;
  height: 9px;
}
.page-faq .faq-item[open] .faq-item__mark {
  border-color: var(--mint);
}
.page-faq .faq-item[open] .faq-item__mark::before,
.page-faq .faq-item[open] .faq-item__mark::after {
  background: var(--mint);
}
.page-faq .faq-item[open] .faq-item__mark::after {
  transform: translate(-50%, -50%) scaleY(0);
  opacity: 0;
}
.page-faq .faq-item__text {
  flex: 1 1 auto;
  min-width: 0;
}
.page-faq .faq-item__a {
  padding: 0 18px 18px 50px;
  font-size: var(--fs-small);
  line-height: 1.8;
  color: var(--mist);
}
.page-faq .faq-item__a p {
  margin: 0;
}
.page-faq .faq-item__a p + p {
  margin-top: 10px;
}
.page-faq .faq-item__a a {
  color: var(--mint);
  text-decoration: none;
  border-bottom: 1px solid rgba(92, 242, 180, .45);
}
.page-faq .faq-item__a a:hover {
  border-bottom-color: var(--mint);
}
.page-faq .faq-num {
  font-family: var(--font-mono);
  font-size: .95em;
  font-weight: 700;
  color: var(--paper);
  background: rgba(92, 242, 180, .14);
  border-radius: 4px;
  padding: 1px 6px;
  white-space: nowrap;
}

/* 热门问题胶囊 */
.page-faq .faq-hot {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.page-faq .faq-hot__link {
  display: inline-block;
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(18, 43, 36, .5);
  color: var(--mist);
  font-size: var(--fs-caption);
  text-decoration: none;
  white-space: nowrap;
  transition: color .2s ease, border-color .2s ease, background-color .2s ease;
}
.page-faq .faq-hot__link:hover {
  color: var(--mint);
  border-color: var(--mint);
  background: rgba(92, 242, 180, .1);
}
.page-faq .faq-hot__link:focus-visible {
  outline: 2px solid var(--mint);
  outline-offset: 2px;
}

/* 反馈面板 */
.page-faq .faq-help {
  padding-top: clamp(38px, 6vw, 72px);
}
.page-faq .faq-help__panel {
  padding: clamp(20px, 4vw, 42px);
  border-radius: var(--r-xl);
  border: 1px solid rgba(7, 18, 15, .1);
  background: var(--paper);
  color: var(--faq-ink-strong);
  box-shadow: var(--shadow-1);
}
.page-faq .faq-help__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 34px);
  align-items: center;
}
.page-faq .faq-help__eyebrow {
  margin: 0;
  color: var(--cinnabar);
}
.page-faq .faq-help__title {
  margin: 8px 0 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(24px, 3.4vw, 34px);
  letter-spacing: -0.02em;
  line-height: 1.2;
  color: var(--ink-900);
}
.page-faq .faq-help__lede {
  margin: 12px 0 0;
  font-size: var(--fs-small);
  line-height: 1.8;
  color: var(--faq-ink-soft);
}
.page-faq .faq-help__list {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  gap: 9px;
}
.page-faq .faq-help__list li {
  display: flex;
  gap: 12px;
  align-items: baseline;
  padding-bottom: 9px;
  border-bottom: 1px solid rgba(7, 18, 15, .1);
  font-size: var(--fs-small);
  line-height: 1.7;
  color: var(--faq-ink-strong);
}
.page-faq .faq-help__list li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}
.page-faq .faq-help__label {
  flex: 0 0 auto;
  min-width: 72px;
  font-family: var(--font-mono);
  font-size: var(--fs-caption);
  letter-spacing: .04em;
  color: var(--cinnabar);
}
.page-faq .faq-help__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}
.page-faq .faq-help__ghost {
  color: var(--ink-800);
  border-color: rgba(7, 18, 15, .3);
}
.page-faq .faq-help__ghost:hover {
  color: var(--ink-900);
  border-color: var(--ink-800);
}
.page-faq .faq-help__figure {
  margin: 0;
}
.page-faq .faq-help__figure .faq-figure__img {
  border-color: rgba(7, 18, 15, .12);
  background: var(--ink-700);
}
.page-faq .faq-help__figure .figure__caption {
  color: var(--faq-ink-soft);
}

/* 平板与桌面 */
@media (min-width: 700px) {
  .page-faq .faq-item__a {
    padding-left: 18px;
    padding-right: 26px;
  }
  .page-faq .faq-help__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
  }
}

@media (min-width: 920px) {
  .page-faq .faq-body__grid {
    grid-template-columns: minmax(0, 200px) minmax(0, 1fr) minmax(0, 200px);
    gap: 26px;
  }
  .page-faq .faq-rail--left {
    position: sticky;
    top: 24px;
  }
}

@media (min-width: 1200px) {
  .page-faq .faq-body__grid {
    grid-template-columns: minmax(0, 236px) minmax(0, 660px) minmax(0, 236px);
    gap: 32px;
    justify-content: center;
  }
  .page-faq .faq-item__a {
    padding-left: 50px;
    padding-right: 24px;
  }
}

@media (max-width: 639px) {
  .page-faq .faq-hot {
    flex-wrap: nowrap;
    overflow-x: auto;
    padding-bottom: 8px;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: thin;
  }
  .page-faq .faq-hot li {
    flex: 0 0 auto;
  }
  .page-faq .faq-jump__pill {
    flex: 1 1 auto;
    justify-content: center;
  }
  .page-faq .faq-help__label {
    min-width: 62px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-jump__pill:hover {
    transform: none;
  }
  .page-faq .faq-item__mark::before,
  .page-faq .faq-item__mark::after {
    transition: none;
  }
}