.page-faq {
  --faq-line: rgba(159, 176, 201, .16);
  --faq-line-strong: rgba(159, 176, 201, .34);
  --faq-panel-top: rgba(42, 27, 77, .62);
  --faq-panel-bottom: rgba(27, 16, 53, .74);
  --faq-shadow: 0 20px 44px rgba(4, 11, 24, .5);

  display: block;
  min-width: 0;
  overflow-x: hidden;
  color: var(--c-paper);
  font-family: var(--f-sans);
  font-size: 17px;
  line-height: 1.75;
  background:
    radial-gradient(1100px 520px at 90% -8%, rgba(44, 224, 214, .08), transparent 62%),
    linear-gradient(180deg, var(--c-ink) 0%, var(--c-ink-deep) 100%);
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(76px, 11vw, 132px) var(--gutter) clamp(30px, 5vw, 58px);
  border-bottom: 1px solid var(--faq-line);
  background:
    radial-gradient(760px 420px at 78% 0%, rgba(122, 36, 56, .48), transparent 66%),
    radial-gradient(520px 360px at 8% 100%, rgba(216, 164, 64, .12), transparent 70%),
    linear-gradient(165deg, var(--c-violet) 0%, var(--c-ink) 76%);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: .16;
  background-image: radial-gradient(rgba(244, 241, 232, .55) .8px, transparent 1px);
  background-size: 34px 34px;
  -webkit-mask-image: linear-gradient(180deg, #000 0%, transparent 78%);
  mask-image: linear-gradient(180deg, #000 0%, transparent 78%);
}

.page-faq .faq-hero-inner {
  position: relative;
  z-index: 1;
  max-width: var(--shell);
  margin-inline: auto;
  display: grid;
  gap: clamp(28px, 4.4vw, 52px);
  align-items: end;
}

.page-faq .faq-hero-copy {
  min-width: 0;
}

.page-faq .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 22px;
  padding: 0;
  list-style: none;
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--c-slate);
}

.page-faq .breadcrumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--faq-line-strong);
}

.page-faq .breadcrumb a {
  color: var(--c-slate);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .breadcrumb a:hover {
  color: var(--c-cyan);
  border-bottom-color: var(--c-cyan);
}

.page-faq .eyebrow {
  margin: 0;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--c-gold);
}

.page-faq .faq-hero .display {
  margin: 14px 0 0;
  font-size: clamp(36px, 7vw, 82px);
  font-weight: 900;
  line-height: 1.04;
  letter-spacing: -.022em;
  color: var(--c-paper);
  text-wrap: balance;
}

.page-faq .faq-hero .lede {
  margin: 22px 0 0;
  max-width: 50ch;
  font-size: clamp(16px, 1.7vw, 18px);
  line-height: 1.8;
  color: var(--c-slate);
}

.page-faq .faq-hero-figure {
  margin: 0;
  min-width: 0;
  border: 1px solid var(--faq-line-strong);
  border-radius: var(--radius);
  overflow: hidden;
  background: rgba(4, 11, 24, .6);
}

.page-faq .faq-hero-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(.9) contrast(1.08) brightness(.92);
}

/* ---------- 主体格栅 ---------- */

.page-faq .faq-layout {
  max-width: var(--shell);
  margin-inline: auto;
  padding: clamp(34px, 6vw, 74px) var(--gutter) clamp(56px, 9vw, 112px);
  display: grid;
  gap: clamp(30px, 5vw, 58px);
  min-width: 0;
}

.page-faq .faq-rail {
  min-width: 0;
}

.page-faq .faq-rail-sticky {
  display: grid;
  gap: 14px;
}

.page-faq .rail-label {
  margin: 0;
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--c-gold);
}

.page-faq .faq-rail-nav {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(142px, 1fr));
  gap: 6px;
  min-width: 0;
}

.page-faq .faq-rail-nav .rail-link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 12px;
  border: 1px solid transparent;
  border-left: 2px solid var(--faq-line);
  border-radius: var(--radius);
  color: var(--c-slate);
  text-decoration: none;
  font-size: 14.5px;
  line-height: 1.45;
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease),
    border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-faq .faq-rail-nav .rail-link:hover {
  color: var(--c-paper);
  border-left-color: var(--c-gold);
  background: rgba(216, 164, 64, .08);
  transform: translateX(2px);
}

.page-faq .faq-rail-nav .rail-link[aria-current] {
  color: var(--c-paper);
  border-left-color: var(--c-cyan);
  background: rgba(44, 224, 214, .1);
}

.page-faq .faq-rail-nav .rail-index {
  flex: none;
  font-family: var(--f-mono);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: .08em;
  color: var(--c-gold);
}

.page-faq .rail-meter {
  height: 2px;
  background: var(--faq-line);
  overflow: hidden;
}

.page-faq .rail-meter > span {
  display: block;
  width: 100%;
  height: 100%;
  transform: scaleX(0);
  transform-origin: left center;
  background: linear-gradient(90deg, var(--c-cyan), var(--c-gold), var(--c-orange));
  transition: transform .18s linear;
}

.page-faq .faq-body {
  display: grid;
  gap: clamp(36px, 5.5vw, 74px);
  min-width: 0;
}

/* ---------- 分类区块 ---------- */

.page-faq .faq-block {
  min-width: 0;
  padding-top: clamp(30px, 5vw, 54px);
  border-top: 1px solid var(--faq-line);
  scroll-margin-top: 96px;
}

.page-faq .faq-block:first-child {
  padding-top: 0;
  border-top: 0;
}

.page-faq .faq-block-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  column-gap: clamp(14px, 2.2vw, 24px);
  row-gap: 8px;
  align-items: baseline;
  margin-bottom: clamp(20px, 3vw, 32px);
}

.page-faq .faq-block-num {
  grid-column: 1;
  grid-row: 1;
  font-family: var(--f-mono);
  font-size: clamp(26px, 4vw, 40px);
  font-weight: 700;
  line-height: .95;
  letter-spacing: -.02em;
  color: var(--c-gold);
}

.page-faq .faq-block-head .h2 {
  grid-column: 2;
  grid-row: 1;
  margin: 0;
  font-size: clamp(22px, 3.2vw, 34px);
  font-weight: 700;
  line-height: 1.24;
  color: var(--c-paper);
}

.page-faq .faq-block-note {
  grid-column: 2;
  grid-row: 2;
  margin: 0;
  max-width: 64ch;
  font-size: 15px;
  line-height: 1.72;
  color: var(--c-slate);
}

.page-faq .faq-block-note a {
  color: var(--c-cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

.page-faq .faq-sub {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: clamp(24px, 3.4vw, 38px) 0 14px;
  font-size: clamp(17px, 2vw, 20px);
  font-weight: 700;
  letter-spacing: .01em;
  color: var(--c-paper);
}

.page-faq .faq-sub::before {
  content: "";
  flex: none;
  width: 22px;
  height: 2px;
  background: var(--c-cyan);
}

/* ---------- 问答条目 ---------- */

.page-faq .faq-list {
  display: grid;
  gap: 10px;
  min-width: 0;
}

.page-faq .faq-item {
  position: relative;
  border: 1px solid var(--faq-line);
  border-left: 3px solid var(--c-wine);
  border-radius: var(--radius);
  background: linear-gradient(180deg, var(--faq-panel-top), var(--faq-panel-bottom));
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease),
    background var(--dur) var(--ease);
}

.page-faq .faq-item::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 1px;
  pointer-events: none;
  background: linear-gradient(90deg, rgba(244, 241, 232, .26), transparent 62%);
}

.page-faq .faq-item:hover {
  border-color: var(--faq-line-strong);
  border-left-color: var(--c-gold);
  transform: translateY(-1px);
}

.page-faq .faq-item[open] {
  border-left-color: var(--c-cyan);
  background: linear-gradient(180deg, rgba(42, 27, 77, .92), rgba(27, 16, 53, .95));
}

.page-faq .faq-q {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: clamp(10px, 1.6vw, 16px);
  padding: clamp(15px, 2vw, 20px) clamp(14px, 2vw, 22px);
  cursor: pointer;
  list-style: none;
  font-size: clamp(15px, 1.7vw, 17.5px);
  font-weight: 700;
  line-height: 1.5;
  color: var(--c-paper);
}

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

.page-faq .faq-q-mark {
  display: grid;
  place-items: center;
  width: 26px;
  height: 26px;
  border: 1px solid var(--faq-line-strong);
  border-radius: 50%;
  font-family: var(--f-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--c-cyan);
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-faq .faq-item[open] .faq-q-mark {
  border-color: var(--c-cyan);
  color: var(--c-gold);
}

.page-faq .faq-q-toggle {
  position: relative;
  flex: none;
  width: 14px;
  height: 14px;
}

.page-faq .faq-q-toggle::before,
.page-faq .faq-q-toggle::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--c-gold);
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}

.page-faq .faq-q-toggle::before {
  width: 14px;
  height: 1.5px;
  transform: translate(-50%, -50%);
}

.page-faq .faq-q-toggle::after {
  width: 1.5px;
  height: 14px;
  transform: translate(-50%, -50%);
}

.page-faq .faq-item[open] .faq-q-toggle::after {
  transform: translate(-50%, -50%) scaleY(0);
  opacity: 0;
}

.page-faq .faq-a {
  padding: 0 clamp(14px, 2vw, 22px) clamp(18px, 2.4vw, 24px);
  padding-left: calc(clamp(14px, 2vw, 22px) + 42px);
  color: var(--c-slate);
  font-size: 16px;
  line-height: 1.8;
}

.page-faq .faq-a p {
  margin: 0;
}

.page-faq .faq-a a {
  color: var(--c-cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

.page-faq .faq-a a:hover {
  color: var(--c-gold);
}

/* ---------- 图文块 ---------- */

.page-faq .faq-figure {
  margin: 0 0 clamp(18px, 2.6vw, 26px);
  min-width: 0;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--faq-line-strong);
  border-radius: var(--radius);
  filter: saturate(.92) contrast(1.06) brightness(.94);
}

.page-faq .faq-figure .figure-caption {
  margin-top: 10px;
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--c-slate);
}

/* ---------- 收口面板 ---------- */

.page-faq .faq-help-panel {
  display: grid;
  gap: clamp(18px, 2.6vw, 28px);
  padding: clamp(22px, 3.4vw, 38px);
  border: 1px solid var(--faq-line-strong);
  border-radius: var(--radius);
  background:
    radial-gradient(520px 260px at 100% 0%, rgba(255, 122, 61, .16), transparent 70%),
    linear-gradient(150deg, rgba(122, 36, 56, .34), rgba(27, 16, 53, .92) 64%);
  box-shadow: var(--faq-shadow);
}

.page-faq .faq-help-copy {
  min-width: 0;
}

.page-faq .faq-help-title {
  margin: 0 0 8px;
  font-size: clamp(18px, 2.4vw, 23px);
  font-weight: 700;
  color: var(--c-paper);
}

.page-faq .faq-help-text {
  margin: 0;
  max-width: 58ch;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--c-slate);
}

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

/* ---------- 响应式 ---------- */

@media (min-width: 720px) {
  .page-faq .faq-help-panel {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero-inner {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, .94fr);
  }
}

@media (min-width: 1080px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--rail) minmax(0, 1fr);
    gap: clamp(40px, 5vw, 84px);
    align-items: start;
  }

  .page-faq .faq-rail-sticky {
    position: sticky;
    top: 92px;
    gap: 16px;
    padding: 22px 18px;
    border: 1px solid var(--faq-line);
    border-radius: var(--radius);
    background: linear-gradient(180deg, rgba(42, 27, 77, .86), rgba(8, 18, 38, .88));
    box-shadow: var(--faq-shadow);
  }

  .page-faq .faq-rail-nav {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 560px) {
  .page-faq .faq-a {
    padding-left: clamp(14px, 2vw, 22px);
  }

  .page-faq .faq-block-head {
    grid-template-columns: auto minmax(0, 1fr);
  }

  .page-faq .faq-help-actions .btn {
    flex: 1 1 auto;
    text-align: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item,
  .page-faq .faq-q-mark,
  .page-faq .faq-q-toggle::before,
  .page-faq .faq-q-toggle::after,
  .page-faq .faq-rail-nav .rail-link,
  .page-faq .rail-meter > span {
    transition: none;
  }

  .page-faq .faq-item:hover,
  .page-faq .faq-rail-nav .rail-link:hover {
    transform: none;
  }
}