.page-faq {
  --faq-line: rgba(11, 31, 58, .14);
  --faq-radius: 14px;
  background: var(--paper);
  color: var(--ink);
}

.page-faq .faq-shell {
  padding-bottom: clamp(2.5rem, 7vw, 5rem);
}

.page-faq .breadcrumbs {
  margin: .75rem 0 clamp(1rem, 3vw, 1.75rem);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.5rem);
  align-items: center;
  padding-bottom: clamp(2rem, 5vw, 3.5rem);
}

.page-faq .faq-hero__title {
  margin: .5rem 0 1rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2rem, 7.6vw, 3.75rem);
  line-height: 1.07;
  letter-spacing: -.035em;
  color: var(--navy);
  max-width: 20em;
}

.page-faq .faq-hero__copy .lede {
  max-width: 46ch;
  font-size: 1rem;
  line-height: 1.9;
  color: var(--ink);
}

.page-faq .faq-hero__chips {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  margin: 1.5rem 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-hero__chips li {
  padding: .4rem .8rem;
  border-radius: 999px;
  background: var(--sage);
  color: var(--navy);
  font-family: var(--font-mono);
  font-size: .76rem;
  letter-spacing: .02em;
}

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

.page-faq .figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
}

.page-faq .faq-hero__figure .figure__frame {
  overflow: hidden;
  border: 1px solid var(--sand);
  border-radius: var(--faq-radius);
  background: var(--sand);
}

.page-faq .faq-hero__figure .figure__frame img {
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.page-faq .figure__caption {
  margin-top: .6rem;
  font-family: var(--font-mono);
  font-size: .8rem;
  line-height: 1.6;
  letter-spacing: .01em;
  color: var(--steel);
}

/* ---------- 主体两栏 ---------- */
.page-faq .faq-layout {
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.75rem);
  align-items: start;
}

.page-faq .faq-index {
  border-top: 2px solid var(--navy);
  padding-top: .85rem;
}

.page-faq .faq-index__title {
  margin: 0 0 .65rem;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--steel);
}

.page-faq .faq-index__list {
  display: flex;
  gap: .4rem;
  margin: 0;
  padding: 0 0 .35rem;
  list-style: none;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.page-faq .faq-index__item {
  flex: 0 0 auto;
}

.page-faq .faq-index__link {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  padding: .5rem .85rem;
  border: 1px solid var(--sand);
  border-radius: 999px;
  background: rgba(255, 255, 255, .72);
  color: var(--navy);
  text-decoration: none;
  font-size: .88rem;
  white-space: nowrap;
  transition: border-color .22s var(--ease), color .22s var(--ease), background-color .22s var(--ease);
}

.page-faq .faq-index__num {
  font-family: var(--font-mono);
  font-size: .72rem;
  color: var(--signal);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  border-color: var(--signal);
  color: var(--signal);
}

.page-faq a:focus-visible,
.page-faq summary:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 2px;
}

/* ---------- 问题分组 ---------- */
.page-faq .faq-groups {
  display: flex;
  flex-direction: column;
  gap: clamp(2rem, 5vw, 3.25rem);
  min-width: 0;
}

.page-faq .faq-group {
  min-width: 0;
  scroll-margin-top: 6.5rem;
}

.page-faq .faq-group__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: .3rem .85rem;
  padding-bottom: .9rem;
  margin-bottom: 1.1rem;
  border-bottom: 2px solid var(--navy);
}

.page-faq .faq-group__num {
  font-size: .8rem;
  letter-spacing: .1em;
  color: var(--signal);
}

.page-faq .faq-group__title {
  flex: 1 1 auto;
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.35rem, 5vw, 1.9rem);
  line-height: 1.2;
  letter-spacing: -.02em;
  color: var(--navy);
}

.page-faq .faq-group__lede {
  flex: 1 1 100%;
  margin: .3rem 0 0;
  font-size: .92rem;
  line-height: 1.75;
  color: var(--steel);
}

/* ---------- 折叠问答 ---------- */
.page-faq .qa {
  margin-bottom: .55rem;
  border: 1px solid var(--sand);
  border-left: 3px solid var(--sand);
  border-radius: 0 10px 10px 0;
  background: rgba(255, 255, 255, .6);
  overflow: hidden;
  transition: background-color .22s var(--ease), border-color .22s var(--ease);
}

.page-faq .qa[open] {
  background: var(--sage);
  border-left-color: var(--signal);
  border-color: rgba(11, 31, 58, .1);
  border-left-color: var(--signal);
}

.page-faq .qa__q {
  position: relative;
  display: block;
  padding: .9rem 2.6rem .9rem 1rem;
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.5;
  letter-spacing: -.01em;
  color: var(--navy);
  cursor: pointer;
  list-style: none;
  transition: color .2s var(--ease);
}

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

.page-faq .qa__q::marker {
  content: "";
}

.page-faq .qa__q::after {
  content: "";
  position: absolute;
  right: 1.05rem;
  top: 50%;
  width: 9px;
  height: 9px;
  border-right: 2px solid var(--steel);
  border-bottom: 2px solid var(--steel);
  transform: translateY(-70%) rotate(45deg);
  transition: transform .22s var(--ease), border-color .22s var(--ease);
}

.page-faq .qa[open] .qa__q::after {
  transform: translateY(-25%) rotate(-135deg);
  border-color: var(--signal);
}

.page-faq .qa__q:hover {
  color: var(--signal);
}

.page-faq .qa__a {
  padding: 0 1rem 1.05rem;
  font-size: .95rem;
  line-height: 1.85;
  color: var(--ink);
}

.page-faq .qa__a > :first-child {
  margin-top: 0;
}

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

.page-faq .qa__a p {
  margin: 0 0 .6rem;
}

.page-faq .qa__a ul {
  margin: .35rem 0 .65rem;
  padding-left: 1.15rem;
}

.page-faq .qa__a li {
  margin-bottom: .35rem;
}

.page-faq .qa__a strong {
  color: var(--navy);
}

.page-faq .qa__a a {
  color: var(--navy);
  text-decoration: underline;
  text-decoration-color: var(--signal);
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
}

.page-faq .qa__a a:hover {
  color: var(--signal);
}

.page-faq .qa__table-wrap {
  margin: .8rem 0 .3rem;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-faq .qa__table {
  width: 100%;
  min-width: 420px;
  border-collapse: collapse;
  font-size: .86rem;
}

.page-faq .qa__table th,
.page-faq .qa__table td {
  padding: .5rem .6rem;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .qa__table thead th {
  font-family: var(--font-mono);
  font-size: .72rem;
  font-weight: 500;
  letter-spacing: .08em;
  color: var(--steel);
}

.page-faq .qa__table td:first-child {
  font-weight: 700;
  color: var(--navy);
  white-space: nowrap;
}

.page-faq .qa__table tbody tr:nth-child(odd) {
  background: rgba(255, 255, 255, .45);
}

/* ---------- 老用户分栏 ---------- */
.page-faq .faq-mobile-grid {
  display: grid;
  gap: 1.25rem;
  min-width: 0;
}

.page-faq .faq-mobile-grid__figure .figure__frame {
  overflow: hidden;
  border-radius: var(--faq-radius);
  background: var(--sand);
}

.page-faq .faq-mobile-grid__figure .figure__frame img {
  aspect-ratio: 5 / 6;
  object-fit: cover;
}

/* ---------- 底部服务台 ---------- */
.page-faq .faq-desk {
  position: relative;
  overflow: hidden;
  margin-top: clamp(.5rem, 3vw, 1.5rem);
  padding: clamp(1.4rem, 5vw, 2.75rem);
  border-radius: 18px;
  background: var(--navy);
  color: var(--paper);
}

.page-faq .faq-desk::after {
  content: "";
  position: absolute;
  right: -60px;
  bottom: -60px;
  width: 180px;
  height: 180px;
  border: 2px solid rgba(255, 90, 31, .35);
  border-radius: 50%;
  pointer-events: none;
}

.page-faq .faq-desk__eyebrow {
  margin: 0 0 .5rem;
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .16em;
  color: var(--signal);
}

.page-faq .faq-desk__title {
  margin: 0 0 .7rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.4rem, 5vw, 2.1rem);
  line-height: 1.2;
  letter-spacing: -.02em;
  color: var(--paper);
}

.page-faq .faq-desk__lede {
  max-width: 52ch;
  margin: 0 0 1.5rem;
  font-size: .95rem;
  line-height: 1.85;
  color: rgba(247, 244, 239, .82);
}

.page-faq .faq-desk__facts {
  display: grid;
  gap: .85rem 1.5rem;
  margin: 0 0 1.75rem;
  padding: 0;
}

.page-faq .faq-desk__fact {
  min-width: 0;
  padding-top: .7rem;
  border-top: 1px solid rgba(247, 244, 239, .18);
}

.page-faq .faq-desk__fact dt {
  margin-bottom: .3rem;
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .12em;
  color: rgba(247, 244, 239, .55);
}

.page-faq .faq-desk__fact dd {
  margin: 0;
  font-size: .92rem;
  line-height: 1.6;
  color: var(--paper);
  overflow-wrap: anywhere;
}

.page-faq .faq-desk__actions {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  gap: .7rem;
}

.page-faq .faq-desk__actions .btn {
  text-decoration: none;
}

.page-faq .faq-desk__actions .btn--ghost {
  border-color: rgba(247, 244, 239, .45);
  color: var(--paper);
}

.page-faq .faq-desk__actions .btn--ghost:hover,
.page-faq .faq-desk__actions .btn--ghost:focus-visible {
  border-color: var(--signal);
  color: var(--signal);
}

/* ---------- 断点 ---------- */
@media (min-width: 600px) {
  .page-faq .faq-desk__facts {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 780px) {
  .page-faq .faq-mobile-grid {
    grid-template-columns: minmax(0, 1fr) minmax(160px, 240px);
    align-items: start;
    gap: 1.5rem;
  }
}

@media (min-width: 820px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 1.04fr) minmax(0, .96fr);
  }
}

@media (min-width: 1040px) {
  .page-faq .faq-layout {
    grid-template-columns: minmax(200px, 236px) minmax(0, 1fr);
    gap: clamp(2rem, 4vw, 3.5rem);
  }

  .page-faq .faq-index {
    position: sticky;
    top: 6.5rem;
    border-top: 0;
    padding-top: 0;
  }

  .page-faq .faq-index__title {
    padding-left: .95rem;
  }

  .page-faq .faq-index__list {
    flex-direction: column;
    gap: .1rem;
    overflow: visible;
    padding-bottom: 0;
  }

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

  .page-faq .faq-index__link {
    border: 0;
    border-left: 3px solid transparent;
    border-radius: 0 8px 8px 0;
    background: transparent;
    padding: .55rem .9rem;
    white-space: normal;
    font-size: .92rem;
  }

  .page-faq .faq-index__link:hover,
  .page-faq .faq-index__link:focus-visible {
    background: var(--signal-mist);
    border-left-color: var(--signal);
    color: var(--navy);
  }
}

@media (min-width: 1120px) {
  .page-faq .faq-desk__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa,
  .page-faq .qa__q,
  .page-faq .qa__q::after,
  .page-faq .faq-index__link {
    transition: none;
  }
}