.page-faq {
  --faq-rail-w: 236px;
  --faq-gap: 52px;
}

/* ---------- 首屏 ---------- */
.page-faq__hero {
  padding-top: clamp(20px, 4vw, 36px);
}

.page-faq__hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
  margin-top: clamp(20px, 4vw, 40px);
}

.page-faq__hero-side {
  border-top: 1px solid var(--ml-line);
  padding-top: 14px;
}

.page-faq__hero-note {
  margin-top: 10px;
  letter-spacing: .04em;
}

.page-faq__title {
  max-width: 17ch;
}

.page-faq__lead {
  margin-top: 18px;
  max-width: 62ch;
}

.page-faq__actions {
  margin-top: 26px;
  flex-wrap: wrap;
}

.page-faq__figure {
  margin: clamp(28px, 5vw, 48px) 0 0;
}

.page-faq__figure .ml-media {
  border-radius: var(--ml-r-lg);
}

/* ---------- 入口卡 ---------- */
.page-faq__entry-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin-top: clamp(22px, 4vw, 34px);
}

.page-faq__entry {
  display: flex;
  flex-direction: column;
  gap: 8px;
  text-decoration: none;
  color: inherit;
  transition: transform .24s var(--ml-ease), border-color .24s var(--ml-ease), background-color .24s var(--ml-ease);
}

.page-faq__entry:hover,
.page-faq__entry:focus-visible {
  transform: translateY(-3px);
  border-color: rgba(31, 224, 200, .5);
  background-color: var(--ml-sheet-strong);
}

.page-faq__entry .ml-card__title {
  font-size: 1.02rem;
  letter-spacing: .02em;
}

.page-faq__entry .ml-card__link {
  color: var(--ml-cyan);
  font-family: var(--ml-mono);
  font-size: .78rem;
  letter-spacing: .06em;
}

/* ---------- 索引 + 问答 ---------- */
.page-faq__layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
}

.page-faq__rail {
  display: none;
}

.page-faq__rail-list {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-faq__rail-item {
  margin: 0;
}

.page-faq__rail-link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 12px;
  border-left: 2px solid var(--ml-line-soft);
  color: var(--ml-text);
  text-decoration: none;
  font-size: .9rem;
  transition: border-color .22s var(--ml-ease), color .22s var(--ml-ease), background-color .22s var(--ml-ease);
}

.page-faq__rail-link .ml-num {
  color: var(--ml-mist);
  font-size: .76rem;
}

.page-faq__rail-link:hover,
.page-faq__rail-link:focus-visible {
  border-left-color: var(--ml-cyan);
  color: var(--ml-snow);
  background-color: rgba(31, 224, 200, .07);
}

.page-faq__rail-link--warm:hover,
.page-faq__rail-link--warm:focus-visible {
  border-left-color: var(--ml-orange);
  background-color: rgba(255, 159, 69, .08);
}

.page-faq__rail-note {
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--ml-line-soft);
}

/* ---------- 分组 ---------- */
.faq-group + .faq-group {
  margin-top: clamp(34px, 5vw, 52px);
}

.faq-group__head {
  border-top: 1px solid var(--ml-line);
  padding-top: 16px;
}

.faq-group__title {
  margin-top: 8px;
}

.faq-group__intro {
  margin: 10px 0 0;
  max-width: 58ch;
  color: var(--ml-text);
  font-size: .95rem;
  line-height: 1.75;
}

/* ---------- 手风琴条目 ---------- */
.page-faq .faq-item {
  margin-top: 12px;
  border: 1px solid var(--ml-line);
  border-radius: var(--ml-r);
  background-color: var(--ml-sheet);
  overflow: hidden;
  transition: background-color .24s var(--ml-ease), border-color .24s var(--ml-ease), box-shadow .24s var(--ml-ease);
}

.page-faq .faq-item > summary {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
  color: var(--ml-snow);
}

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

.page-faq .faq-item > summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--ml-mono);
  font-size: 1.1rem;
  line-height: 1;
  color: var(--ml-cyan);
  transition: color .24s var(--ml-ease), transform .24s var(--ml-ease);
}

.page-faq .faq-item[open] {
  background-color: var(--ml-sheet-strong);
  border-color: rgba(31, 224, 200, .42);
  box-shadow: inset 3px 0 0 var(--ml-cyan);
}

.page-faq .faq-item[open] > summary::after {
  content: "–";
  color: var(--ml-orange);
}

.faq-item__no {
  color: var(--ml-mist);
  font-size: .78rem;
  flex: 0 0 auto;
}

.faq-item__q {
  font-size: .98rem;
  font-weight: 500;
  line-height: 1.6;
}

.page-faq .faq-item[open] .faq-item__q {
  color: var(--ml-cyan);
}

.faq-item__body {
  padding: 0 18px 18px 46px;
  animation: faqItemIn .26s var(--ml-ease) both;
}

.faq-item__body p {
  margin: 0 0 10px;
  color: var(--ml-text);
  font-size: .92rem;
  line-height: 1.8;
}

.faq-item__body p:last-child {
  margin-bottom: 0;
}

.faq-item__links {
  margin-top: 14px !important;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.faq-item__links .ml-chip {
  text-decoration: none;
}

.faq-item__links .ml-chip:hover,
.faq-item__links .ml-chip:focus-visible {
  background-color: rgba(31, 224, 200, .14);
}

@keyframes faqItemIn {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* ---------- 联系 ---------- */
.page-faq__contact {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
  padding: clamp(20px, 3.4vw, 34px);
  border: 1px solid var(--ml-line);
  border-radius: var(--ml-r-lg);
  background:
    radial-gradient(130% 130% at 0% 0%, rgba(31, 224, 200, .12), transparent 56%),
    radial-gradient(110% 110% at 100% 100%, rgba(255, 159, 69, .09), transparent 60%),
    var(--ml-stand);
}

.page-faq__contact-text {
  margin: 14px 0 0;
  color: var(--ml-text);
  line-height: 1.8;
  max-width: 56ch;
}

.page-faq__contact-list {
  margin: 22px 0 0;
  display: grid;
  gap: 10px;
}

.page-faq__contact-row {
  display: grid;
  grid-template-columns: 62px minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--ml-line-soft);
}

.page-faq__contact-row dt {
  color: var(--ml-mist);
  font-size: .76rem;
  letter-spacing: .08em;
}

.page-faq__contact-row dd {
  margin: 0;
  color: var(--ml-snow);
  font-size: .93rem;
  word-break: break-word;
}

.page-faq__contact-row dd a {
  color: var(--ml-cyan);
  text-decoration: none;
}

.page-faq__contact-row dd a:hover,
.page-faq__contact-row dd a:focus-visible {
  text-decoration: underline;
}

.page-faq__flowline {
  display: block;
  width: 100%;
  height: auto;
  margin-top: 24px;
}

.page-faq__flowtext {
  fill: var(--ml-text);
  font-family: var(--ml-font);
  font-size: 15px;
}

.page-faq__contact-btn {
  margin-top: 22px;
  align-self: flex-start;
}

.page-faq__contact-fig {
  margin: 0;
}

.page-faq__contact-fig .ml-media {
  border-radius: var(--ml-r);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-faq__entry-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .faq-item > summary {
    padding: 18px 22px;
  }

  .faq-item__body {
    padding: 0 22px 20px 58px;
  }
}

@media (min-width: 900px) {
  .page-faq__hero-grid {
    grid-template-columns: minmax(0, .68fr) minmax(0, 2fr);
    gap: 40px;
    align-items: end;
  }

  .page-faq__hero-side {
    padding-top: 20px;
  }

  .page-faq__figure {
    width: 78%;
    margin-left: auto;
  }

  .page-faq__entry-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq__contact {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    align-items: start;
  }
}

@media (min-width: 1024px) {
  .page-faq__layout {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
    gap: var(--faq-gap);
    align-items: start;
  }

  .page-faq__rail {
    display: block;
    position: sticky;
    top: calc(var(--ml-header-h) + 28px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq__entry,
  .page-faq .faq-item,
  .page-faq .faq-item > summary::after {
    transition: none;
  }

  .faq-item__body {
    animation: none;
  }

  .page-faq__entry:hover,
  .page-faq__entry:focus-visible {
    transform: none;
  }
}