/* ============================================================
   支持中心 /support/ —— 页面专属样式
   作用域：.page-faq
   ============================================================ */

.page-faq {
  --faq-tint: rgba(46, 123, 255, 0.06);
  --faq-gold-tint: rgba(242, 193, 78, 0.14);
  --faq-work-top: 96px;
  display: block;
  background: var(--paper);
  color: var(--text-strong);
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(32px, 5vw, 64px) clamp(56px, 8vw, 104px);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  right: -160px;
  top: -140px;
  width: 460px;
  height: 460px;
  border-radius: 50%;
  background: radial-gradient(circle at 50% 50%, rgba(46, 123, 255, 0.18), transparent 68%);
  pointer-events: none;
}

.page-faq .faq-hero .shell {
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: 30px;
  margin-top: clamp(24px, 3.5vw, 42px);
}

@media (min-width: 980px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    align-items: end;
    gap: clamp(32px, 4vw, 64px);
  }
}

.page-faq .faq-hero__title {
  margin: 12px 0 18px;
  font-size: clamp(40px, 7vw, 82px);
  font-weight: 900;
  line-height: 1.02;
  letter-spacing: -0.01em;
  color: var(--ink-navy);
}

.page-faq .faq-hero__lead {
  max-width: 60ch;
  color: var(--text-muted);
}

.page-faq .fact-strip {
  margin: 0;
  display: grid;
  gap: 0;
  padding: 8px 24px;
  border-radius: var(--r-lg);
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-1);
}

.page-faq .fact-strip__item {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 18px;
  padding: 16px 0;
  border-bottom: 1px dashed var(--line);
}

.page-faq .fact-strip__item:last-child {
  border-bottom: 0;
}

.page-faq .fact-strip dt {
  font-size: 14px;
  color: var(--text-muted);
  white-space: nowrap;
}

.page-faq .fact-strip dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 17px;
  font-weight: 600;
  color: var(--text-strong);
  text-align: right;
}

/* ---------- 热门问题速查 ---------- */

.page-faq .faq-hot {
  padding-block: clamp(56px, 7vw, 104px);
}

.page-faq .faq-hot .section-head__no {
  color: var(--gold);
}

.page-faq .faq-hot .section-head__title {
  color: var(--oninverse);
}

.page-faq .faq-hot .section-head__note {
  color: var(--oninverse-muted);
}

.page-faq .hot-list {
  list-style: none;
  margin: clamp(28px, 4vw, 44px) 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

@media (min-width: 760px) {
  .page-faq .hot-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px 18px;
  }
}

.page-faq .hot-list__link {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 20px;
  border-radius: var(--r-pill);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.14);
  color: var(--oninverse);
  text-decoration: none;
  transition: background 200ms var(--ease), border-color 200ms var(--ease),
    transform 180ms var(--ease);
}

.page-faq .hot-list__link:hover,
.page-faq .hot-list__link:focus-visible {
  background: var(--faq-gold-tint);
  border-color: var(--gold);
  transform: translateY(-2px);
}

.page-faq .hot-list__no {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--gold);
}

.page-faq .hot-list__q {
  flex: 1 1 auto;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
}

.page-faq .hot-list__go {
  flex: 0 0 auto;
  font-size: 15px;
  color: var(--electric);
  transition: transform 200ms var(--ease);
}

.page-faq .hot-list__link:hover .hot-list__go {
  transform: translateY(2px);
}

/* ---------- 问答工作区 ---------- */

.page-faq .faq-work-band {
  padding-block: clamp(56px, 8vw, 120px);
}

.page-faq .faq-work {
  display: grid;
  gap: 28px;
}

@media (min-width: 1020px) {
  .page-faq .faq-work {
    grid-template-columns: 236px minmax(0, 1fr);
    gap: clamp(36px, 4vw, 60px);
    align-items: start;
  }

  .page-faq .faq-idx {
    position: sticky;
    top: var(--faq-work-top);
  }
}

.page-faq .faq-idx__title {
  margin: 0 0 14px;
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-family: var(--font-mono);
  color: var(--text-muted);
}

.page-faq .faq-idx__group + .faq-idx__group {
  margin-top: 18px;
}

.page-faq .faq-idx__gt {
  margin: 0 0 6px;
  padding-left: 14px;
  font-size: 13px;
  font-weight: 700;
  color: var(--text-strong);
}

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

.page-faq .faq-idx__list a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 12px 9px 14px;
  border-radius: var(--r-md);
  border-left: 3px solid transparent;
  font-size: 14px;
  line-height: 1.45;
  color: var(--text-muted);
  text-decoration: none;
  transition: background 200ms var(--ease), color 200ms var(--ease),
    border-color 200ms var(--ease);
}

.page-faq .faq-idx__list a:hover,
.page-faq .faq-idx__list a:focus-visible {
  background: var(--surface);
  color: var(--text-strong);
  border-left-color: var(--electric);
}

.page-faq .faq-idx__list a[aria-current="true"],
.page-faq .faq-idx__list a[aria-current="page"] {
  background: var(--surface);
  color: var(--text-strong);
  border-left-color: var(--gold);
  box-shadow: var(--shadow-1);
}

.page-faq .faq-idx__n {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--electric-ink);
}

/* 展开某条问答时，索引同步高亮 */
.page-faq .faq-work:has(#q-ios-1[open]) .faq-idx__list a[href="#q-ios-1"],
.page-faq .faq-work:has(#q-ios-2[open]) .faq-idx__list a[href="#q-ios-2"],
.page-faq .faq-work:has(#q-fb-1[open]) .faq-idx__list a[href="#q-fb-1"],
.page-faq .faq-work:has(#q-fb-2[open]) .faq-idx__list a[href="#q-fb-2"],
.page-faq .faq-work:has(#q-fb-3[open]) .faq-idx__list a[href="#q-fb-3"],
.page-faq .faq-work:has(#q-sync-1[open]) .faq-idx__list a[href="#q-sync-1"],
.page-faq .faq-work:has(#q-sync-2[open]) .faq-idx__list a[href="#q-sync-2"],
.page-faq .faq-work:has(#q-sync-3[open]) .faq-idx__list a[href="#q-sync-3"],
.page-faq .faq-work:has(#q-fee-1[open]) .faq-idx__list a[href="#q-fee-1"],
.page-faq .faq-work:has(#q-fee-2[open]) .faq-idx__list a[href="#q-fee-2"],
.page-faq .faq-work:has(#q-fee-3[open]) .faq-idx__list a[href="#q-fee-3"] {
  background: var(--surface);
  color: var(--text-strong);
  border-left-color: var(--gold);
  box-shadow: var(--shadow-1);
}

/* ---------- 问答分组 ---------- */

.page-faq .qa-group + .qa-group {
  margin-top: clamp(34px, 4.5vw, 60px);
}

.page-faq .qa-group__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 16px;
  padding: 18px 24px;
  border-radius: var(--r-lg);
  margin-bottom: 16px;
  background: var(--ink-navy);
  color: var(--oninverse);
}

.page-faq .qa-group__no {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--gold);
}

.page-faq .qa-group__title {
  margin: 0;
  font-size: clamp(20px, 2.4vw, 26px);
  font-weight: 800;
  line-height: 1.3;
}

.page-faq .qa-group__note {
  margin: 0 0 0 auto;
  font-size: 14px;
  color: var(--oninverse-muted);
}

.page-faq .qa-group--ios .qa-group__head {
  background: var(--deep-indigo);
}

.page-faq .qa-group--fb .qa-group__head {
  background: var(--deep-teal);
}

.page-faq .qa-group--sync .qa-group__head {
  background: var(--surface);
  color: var(--text-strong);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-1);
}

.page-faq .qa-group--sync .qa-group__no {
  color: var(--electric-ink);
}

.page-faq .qa-group--sync .qa-group__note {
  color: var(--text-muted);
}

.page-faq .qa-group--fee .qa-group__head {
  background: var(--deep-indigo);
}

/* ---------- 手风琴条目 ---------- */

.page-faq .qa {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-1);
  overflow: hidden;
  transition: border-color 200ms var(--ease), box-shadow 200ms var(--ease);
}

.page-faq .qa + .qa {
  margin-top: 12px;
}

.page-faq .qa:hover {
  box-shadow: var(--shadow-2);
}

.page-faq .qa[open] {
  border-color: var(--electric);
  box-shadow: var(--shadow-2);
}

.page-faq .qa__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 14px;
  padding: 20px 22px;
  cursor: pointer;
  list-style: none;
  transition: background 200ms var(--ease);
}

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

.page-faq .qa__head:hover {
  background: var(--faq-tint);
}

.page-faq .qa__no {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--electric-ink);
}

.page-faq .qa[open] .qa__no {
  color: var(--gold);
}

.page-faq .qa__q {
  font-size: 17px;
  font-weight: 700;
  line-height: 1.55;
  color: var(--text-strong);
}

.page-faq .qa__sign {
  position: relative;
  flex: 0 0 auto;
  width: 26px;
  height: 26px;
  border-radius: var(--r-pill);
  border: 1px solid var(--line);
  transition: border-color 200ms var(--ease), background 200ms var(--ease);
}

.page-faq .qa__sign::before,
.page-faq .qa__sign::after {
  content: "";
  position: absolute;
  left: 7px;
  right: 7px;
  top: 50%;
  height: 2px;
  border-radius: 2px;
  background: var(--electric-ink);
  transform: translateY(-50%);
  transition: transform 220ms var(--ease), opacity 220ms var(--ease);
}

.page-faq .qa__sign::after {
  transform: translateY(-50%) rotate(90deg);
}

.page-faq .qa[open] .qa__sign {
  border-color: var(--gold);
  background: var(--faq-gold-tint);
}

.page-faq .qa[open] .qa__sign::after {
  transform: translateY(-50%) rotate(0deg);
  opacity: 0;
}

.page-faq .qa__body {
  padding: 18px 22px 24px;
  border-top: 1px dashed var(--line);
}

.page-faq .qa__body p {
  margin: 0 0 12px;
  max-width: 68ch;
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-strong);
}

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

/* ---------- 章节配图 ---------- */

.page-faq .qa-figure {
  margin: 18px 0 0;
}

.page-faq .qa-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border-radius: var(--r-lg);
}

.page-faq .qa-figure .frame__caption {
  margin-top: 10px;
  font-size: 14px;
  color: var(--text-muted);
}

/* ---------- 仍需帮助 ---------- */

.page-faq .faq-help {
  padding-block: clamp(56px, 7vw, 108px);
}

.page-faq .help-panel {
  display: grid;
  gap: 32px;
}

@media (min-width: 940px) {
  .page-faq .help-panel {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
    align-items: start;
    gap: clamp(40px, 5vw, 72px);
  }
}

.page-faq .help-panel .eyebrow {
  color: var(--gold);
}

.page-faq .help-panel__title {
  margin: 10px 0 16px;
  font-size: clamp(26px, 3.4vw, 40px);
  font-weight: 800;
  line-height: 1.2;
  color: var(--oninverse);
}

.page-faq .help-panel__lead {
  margin: 0 0 26px;
  max-width: 60ch;
  font-size: 16px;
  line-height: 1.75;
  color: var(--oninverse-muted);
}

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

.page-faq .help-panel__contact {
  padding: 10px 24px;
  border-radius: var(--r-lg);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.14);
}

.page-faq .help-panel__contact .contact-row {
  padding: 16px 0;
  border-bottom: 1px dashed rgba(255, 255, 255, 0.16);
}

.page-faq .help-panel__contact .contact-row:last-child {
  border-bottom: 0;
}

.page-faq .help-panel__contact .contact-row__label {
  color: var(--oninverse-muted);
}

.page-faq .help-panel__contact .contact-row__value {
  color: var(--gold);
}

.page-faq .help-panel__contact .contact-row__value--plain,
.page-faq .help-panel__contact .contact-row__hours {
  color: var(--oninverse);
}

/* ---------- 窄屏适配 ---------- */

@media (max-width: 1019px) {
  .page-faq .faq-idx {
    display: flex;
    align-items: center;
    gap: 18px;
    overflow-x: auto;
    padding-bottom: 14px;
    margin-bottom: 6px;
    border-bottom: 1px solid var(--line);
    scrollbar-width: none;
  }

  .page-faq .faq-idx::-webkit-scrollbar {
    display: none;
  }

  .page-faq .faq-idx__title,
  .page-faq .faq-idx__gt {
    display: none;
  }

  .page-faq .faq-idx__group {
    display: flex;
    flex: 0 0 auto;
    margin: 0 !important;
  }

  .page-faq .faq-idx__list {
    display: flex;
    gap: 8px;
    flex: 0 0 auto;
  }

  .page-faq .faq-idx__list a {
    white-space: nowrap;
    padding: 8px 14px;
    border: 1px solid var(--line);
    border-left: 1px solid var(--line);
    border-radius: var(--r-pill);
    background: var(--surface);
    color: var(--text-muted);
  }
}

@media (max-width: 640px) {
  .page-faq .faq-hero::after {
    display: none;
  }

  .page-faq .hot-list__link {
    padding: 14px 16px;
  }

  .page-faq .hot-list__q {
    font-size: 15px;
  }

  .page-faq .qa__head {
    grid-template-columns: auto minmax(0, 1fr);
    gap: 10px;
    padding: 16px 16px;
  }

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

  .page-faq .qa__sign {
    display: none;
  }

  .page-faq .qa__body {
    padding: 16px 16px 20px;
  }

  .page-faq .qa-group__head {
    padding: 16px 18px;
  }

  .page-faq .qa-group__note {
    margin-left: 0;
    flex-basis: 100%;
  }

  .page-faq .help-panel__contact {
    padding: 6px 18px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .hot-list__link,
  .page-faq .hot-list__go,
  .page-faq .faq-idx__list a,
  .page-faq .qa,
  .page-faq .qa__head,
  .page-faq .qa__sign,
  .page-faq .qa__sign::before,
  .page-faq .qa__sign::after {
    transition: none;
  }

  .page-faq .hot-list__link:hover {
    transform: none;
  }
}