/* ============================================================
   常见问题 /faq/ —— 三步指引入口 + 分组问答
   ============================================================ */

.page-faq {
  --faq-ember-ink: #C13C1B;
  --faq-line: rgba(58, 71, 86, .22);
  --faq-line-light: rgba(169, 194, 217, .22);
  display: block;
}

/* ---------- 首屏与三步指引 ---------- */

.page-faq .faq-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding-block: clamp(42px, 6vw, 84px) clamp(60px, 8vw, 116px);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(130% 90% at 104% -12%, rgba(240, 83, 45, .18), transparent 62%),
    radial-gradient(90% 70% at -12% 112%, rgba(63, 166, 138, .12), transparent 60%),
    repeating-linear-gradient(90deg, rgba(169, 194, 217, .06) 0 1px, transparent 1px 96px);
}

.page-faq .crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-bottom: clamp(26px, 4vw, 50px);
  font-size: 13px;
  letter-spacing: .06em;
}

.page-faq .faq-hero__title {
  margin: clamp(14px, 2vw, 22px) 0 clamp(18px, 2.4vw, 28px);
  max-width: 14ch;
  font-size: clamp(34px, 7.6vw, 92px);
}

.page-faq .faq-hero__lead {
  max-width: 40em;
  margin: 0 0 clamp(36px, 5vw, 64px);
}

.page-faq .steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-faq .step {
  position: relative;
  min-height: 44px;
  padding: 24px 22px 26px;
  border: 1px solid var(--line-soft);
  border-top: 3px solid var(--ember);
  background: linear-gradient(165deg, rgba(36, 27, 69, .88), rgba(14, 26, 43, .34));
}

.page-faq .step__no {
  display: block;
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: clamp(30px, 4.6vw, 46px);
  font-weight: 400;
  line-height: 1;
  letter-spacing: .06em;
  color: var(--gold);
}

.page-faq .step__title {
  margin: 0 0 10px;
  font-size: 18px;
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--ivory);
}

.page-faq .step__body {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--mist);
}

.page-faq .faq-hero__figure {
  margin: clamp(40px, 6vw, 72px) 0 0;
  max-width: 760px;
}

.page-faq .faq-hero__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--faq-line-light);
}

/* ---------- 问答区 ---------- */

.page-faq .faq-body {
  padding-block: clamp(56px, 8vw, 108px);
}

.page-faq .faq-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: clamp(40px, 6vw, 72px);
}

.page-faq .faq-jump__link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  padding: 0 18px;
  border: 1px solid var(--faq-line);
  font-size: 14px;
  font-weight: 700;
  color: var(--ink);
  text-decoration: none;
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-faq .faq-jump__link .mono {
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--graphite);
}

.page-faq .faq-jump__link:hover {
  border-color: var(--ember);
  background-color: var(--ember-soft);
  color: var(--faq-ember-ink);
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(56px, 8vw, 112px);
}

.page-faq .faq-group__bar {
  display: block;
  width: 56px;
  height: 6px;
  margin-bottom: 20px;
}

.page-faq .faq-group__bar--ember { background: var(--ember); }
.page-faq .faq-group__bar--gold { background: var(--gold); }
.page-faq .faq-group__bar--celadon { background: var(--celadon); }

.page-faq .faq-group__title {
  margin: 0 0 12px;
}

.page-faq .faq-group__note {
  margin: 0;
  max-width: 34em;
}

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

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

.page-faq .faq-list {
  margin-top: clamp(26px, 3.5vw, 44px);
  border-top: 1px solid var(--faq-line);
}

/* ---------- 可展开条目 ---------- */

.page-faq .faq-item {
  position: relative;
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .faq-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--ember);
  transform: scaleY(0);
  transform-origin: top center;
  transition: transform var(--dur) var(--ease);
  pointer-events: none;
}

.page-faq .faq-group--entry .faq-item::before { background: var(--ember); }
.page-faq .faq-group--version .faq-item::before { background: var(--gold); }
.page-faq .faq-group--account .faq-item::before { background: var(--celadon); }

.page-faq .faq-item:has(.expand__trigger[aria-expanded="true"])::before,
.page-faq .faq-item[data-expand="open"]::before {
  transform: scaleY(1);
}

.page-faq .faq-item > .expand__trigger {
  display: grid;
  grid-template-columns: minmax(26px, auto) minmax(0, 1fr) auto;
  align-items: start;
  column-gap: 14px;
  width: 100%;
  min-height: 44px;
  padding: 22px 0;
  text-align: left;
  background: transparent;
  border: 0;
  cursor: pointer;
}

.page-faq .faq-item > .expand__trigger:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 2px;
}

.page-faq .faq-item .expand__no {
  padding-top: 4px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--faq-ember-ink);
}

.page-faq .faq-group--version .faq-item .expand__no { color: #8A6A10; }
.page-faq .faq-group--account .faq-item .expand__no { color: #2C7A66; }

.page-faq .faq-item .expand__title {
  font-size: clamp(16px, 1.9vw, 19px);
  font-weight: 700;
  line-height: 1.6;
  letter-spacing: -.005em;
  color: var(--ink);
}

.page-faq .faq-item .expand__panel {
  min-width: 0;
  overflow: hidden;
}

.page-faq .faq-item .expand__inner {
  padding-bottom: 26px;
}

.page-faq .faq-item .expand__body p {
  margin: 0 0 1em;
  max-width: 36em;
  font-size: 16px;
  line-height: 1.9;
  color: var(--graphite);
}

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

.page-faq .faq-item .expand__body a {
  color: var(--faq-ember-ink);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
  padding-bottom: 1px;
}

.page-faq .faq-item .expand__body a:hover {
  color: var(--wine);
}

.page-faq .faq-version {
  display: inline-block;
  margin: 6px 0 16px;
  padding: 10px 22px;
  font-family: var(--font-mono);
  font-size: 22px;
  letter-spacing: .14em;
  color: var(--ink);
  background-color: rgba(169, 194, 217, .18);
  background-image:
    repeating-linear-gradient(0deg, rgba(58, 71, 86, .12) 0 1px, transparent 1px 11px),
    repeating-linear-gradient(90deg, rgba(58, 71, 86, .12) 0 1px, transparent 1px 11px);
  border: 1px solid var(--faq-line);
}

/* ---------- 联系收束 ---------- */

.page-faq .faq-help {
  position: relative;
  padding-block: clamp(64px, 9vw, 120px);
}

.page-faq .faq-help__grid {
  display: grid;
  gap: clamp(36px, 5vw, 64px);
}

.page-faq .faq-help__title {
  margin: clamp(14px, 2vw, 20px) 0 18px;
  max-width: 22ch;
}

.page-faq .faq-help__lead {
  max-width: 34em;
  margin: 0 0 clamp(24px, 3vw, 34px);
}

.page-faq .faq-help__sub {
  margin: 0;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--gold);
}

.page-faq .faq-help__list {
  list-style: none;
  margin: clamp(16px, 2vw, 22px) 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-faq .faq-help__list li {
  position: relative;
  padding-left: 22px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--mist);
}

.page-faq .faq-help__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .68em;
  width: 10px;
  height: 1px;
  background: var(--gold);
}

.page-faq .faq-help__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: clamp(28px, 4vw, 40px);
}

.page-faq .faq-help__panel .status-panel {
  margin: 0;
}

/* ---------- 断点：平板以上 ---------- */

@media (min-width: 860px) {
  .page-faq .steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0;
    align-items: stretch;
  }

  .page-faq .step + .step {
    margin-left: 40px;
  }

  .page-faq .step + .step::before {
    content: "";
    position: absolute;
    left: -30px;
    top: 52px;
    width: 22px;
    height: 1px;
    background: var(--line-gold);
  }

  .page-faq .step + .step::after {
    content: "";
    position: absolute;
    left: -12px;
    top: 48px;
    width: 8px;
    height: 8px;
    border-top: 1px solid var(--gold);
    border-right: 1px solid var(--gold);
    transform: rotate(45deg);
  }
}

@media (min-width: 900px) {
  .page-faq .faq-item {
    display: grid;
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    column-gap: clamp(32px, 4vw, 64px);
    align-items: start;
  }

  .page-faq .faq-item > .expand__trigger {
    grid-column: 1;
    grid-row: 1;
  }

  .page-faq .faq-item > .expand__panel {
    grid-column: 2;
    grid-row: 1;
  }

  .page-faq .faq-item .expand__inner {
    padding-top: 22px;
  }

  .page-faq .faq-group__split {
    grid-template-columns: minmax(0, 6fr) minmax(0, 4fr);
    gap: clamp(40px, 5vw, 72px);
    align-items: center;
  }

  .page-faq .faq-group__figure {
    max-width: 420px;
    margin-left: auto;
    width: 100%;
  }

  .page-faq .faq-help__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
    gap: clamp(48px, 6vw, 88px);
    align-items: start;
  }
}

@media (min-width: 1280px) {
  .page-faq .faq-hero__figure {
    max-width: 860px;
  }
}

/* ---------- 减少动效 ---------- */

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