.page-faq {
  --faq-gap: clamp(20px, 3.2vw, 40px);
  --faq-rail-w: 132px;
}

/* ---------- 首屏封面 ---------- */
.page-faq .faq-cover {
  position: relative;
  overflow: hidden;
  border-bottom: var(--rule);
  background-color: var(--ink-950);
  background-image:
    radial-gradient(120% 92% at 6% -10%, rgba(30, 58, 99, .9) 0%, rgba(12, 24, 48, 0) 62%),
    radial-gradient(72% 60% at 94% 12%, rgba(183, 240, 74, .16) 0%, rgba(12, 24, 48, 0) 66%),
    radial-gradient(90% 70% at 58% 118%, rgba(255, 107, 74, .18) 0%, rgba(12, 24, 48, 0) 72%);
  padding-block: clamp(40px, 7vw, 92px) clamp(30px, 5vw, 64px);
}

.page-faq .faq-cover::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(126, 150, 188, .38) 1px, transparent 1px);
  background-size: 22px 22px;
  opacity: .3;
  pointer-events: none;
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, .95), transparent 80%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, .95), transparent 80%);
}

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

.page-faq .faq-cover .breadcrumb {
  margin-bottom: clamp(20px, 3.4vw, 40px);
}

.page-faq .faq-cover__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--faq-gap);
}

.page-faq .faq-cover__title {
  margin: 12px 0 0;
  color: var(--mist);
  line-height: 1.06;
  overflow-wrap: break-word;
}

.page-faq .faq-cover__accent {
  color: var(--lime);
}

.page-faq .faq-cover__lead {
  margin-top: 18px;
  color: var(--ink-400);
}

.page-faq .faq-cover__meta {
  border-top: var(--rule);
  padding-top: 14px;
}

.page-faq .faq-cover__meta-label {
  margin: 0 0 10px;
  color: var(--mono-lime);
}

.page-faq .faq-cover__meta-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
  color: var(--ink-400);
  font-size: 13px;
  line-height: 1.6;
}

.page-faq .faq-cover__meta-list .mono {
  display: block;
  color: var(--mist);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
}

@media (min-width: 960px) {
  .page-faq .faq-cover__grid {
    grid-template-columns: minmax(0, 1fr) minmax(230px, 300px);
    align-items: end;
    gap: clamp(32px, 5vw, 72px);
  }
}

/* ---------- 主体栏格 ---------- */
.page-faq .faq-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
}

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

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

@media (min-width: 1080px) {
  .page-faq .faq-body {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
    gap: clamp(24px, 3vw, 48px);
  }

  .page-faq .faq-rail {
    display: block;
    position: sticky;
    top: calc(var(--nav-h) + 28px);
    align-self: start;
  }

  .page-faq .faq-rail ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    gap: 10px;
  }

  .page-faq .faq-rail a {
    display: block;
    padding-left: 10px;
    border-left: 2px solid var(--ink-700);
    color: var(--ink-400);
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: .1em;
    text-decoration: none;
    line-height: 1.5;
  }

  .page-faq .faq-rail a.is-active,
  .page-faq .faq-rail a[aria-current="location"] {
    border-left-color: var(--lime);
    color: var(--lime);
  }
}

/* ---------- 区块标题 ---------- */
.page-faq .faq-section {
  padding-block: clamp(34px, 5vw, 66px);
}

.page-faq .faq-section--flush {
  padding-top: clamp(18px, 2.6vw, 30px);
}

.page-faq .faq-sec__head {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
  margin-bottom: clamp(20px, 3vw, 34px);
}

.page-faq .faq-sec__head h2 {
  margin: 8px 0 0;
  color: var(--mist);
}

.page-faq .faq-sec__note {
  margin: 0;
  color: var(--ink-400);
}

.page-faq .section--sand .faq-sec__head h2 {
  color: var(--ink-on-sand);
}

.page-faq .section--sand .faq-sec__note,
.page-faq .section--sand .eyebrow {
  color: var(--sand-soft);
}

@media (min-width: 900px) {
  .page-faq .faq-sec__head {
    grid-template-columns: minmax(0, 1fr) minmax(190px, 240px);
    align-items: end;
    gap: 24px;
  }
}

/* ---------- 筛选条 ---------- */
.page-faq .faq-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-faq .filter-bar__btn {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
}

.page-faq .filter-bar__btn[aria-pressed="true"] {
  background: var(--coral);
  border-color: var(--coral);
  color: var(--ink-950);
}

.page-faq .faq-filter__hint {
  margin: 16px 0 0;
  max-width: 38em;
  color: var(--ink-400);
  font-size: 13px;
  line-height: 1.7;
}

/* ---------- 问答折叠条目 ---------- */
.page-faq .faq-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  border-top: var(--rule);
}

.page-faq .faq-item {
  border-bottom: var(--rule);
  transition: opacity var(--t) var(--ease);
}

.page-faq .faq__q {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr) 16px;
  gap: 10px;
  align-items: baseline;
  padding: 15px 0;
  cursor: pointer;
  list-style: none;
}

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

.page-faq .faq__num {
  color: var(--mono-lime);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
}

.page-faq .faq__title {
  color: var(--mist);
  font-size: 17px;
  font-weight: 600;
  line-height: 1.55;
}

.page-faq .faq__q:hover .faq__title {
  color: var(--lime);
}

.page-faq .faq__mark {
  justify-self: end;
  position: relative;
  width: 12px;
  height: 12px;
  margin-top: 6px;
}

.page-faq .faq__mark::before,
.page-faq .faq__mark::after {
  content: "";
  position: absolute;
  left: 0;
  top: 5px;
  width: 12px;
  height: 1px;
  background: var(--lime);
  transition: transform var(--t) var(--ease), background var(--t) var(--ease);
}

.page-faq .faq__mark::after {
  transform: rotate(90deg);
}

.page-faq details[open] .faq__mark::after {
  transform: rotate(0deg);
}

.page-faq details[open] .faq__q .faq__title {
  color: var(--lime);
}

.page-faq .faq__a {
  padding: 0 0 18px 56px;
}

.page-faq .faq__a p {
  margin: 0 0 12px;
  max-width: 38em;
  color: var(--mist);
  font-size: 16px;
  line-height: 1.75;
}

.page-faq .faq__go {
  display: inline-block;
  padding-bottom: 2px;
  border-bottom: 1px solid rgba(183, 240, 74, .55);
  color: var(--lime);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  line-height: 1.6;
  text-decoration: none;
  transition: border-color var(--t) var(--ease), color var(--t) var(--ease);
}

.page-faq .faq__go:hover {
  border-bottom-color: var(--lime);
  color: var(--mist);
}

@media (min-width: 900px) {
  .page-faq .faq-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: clamp(26px, 4vw, 56px);
  }
}

@media (max-width: 560px) {
  .page-faq .faq__q {
    grid-template-columns: 40px minmax(0, 1fr) 14px;
    gap: 8px;
  }

  .page-faq .faq__a {
    padding-left: 48px;
  }
}

/* ---------- 档位与权益 ---------- */
.page-faq .faq-tier {
  display: grid;
  gap: var(--faq-gap);
}

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

.page-faq .faq-tier__figure img {
  border: var(--rule);
}

.page-faq .faq-tier__body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--faq-gap);
}

.page-faq .faq-tier__table-wrap {
  min-width: 0;
  overflow-x: auto;
}

.page-faq .faq-tier__table {
  width: 100%;
  min-width: 520px;
  border-collapse: collapse;
}

.page-faq .faq-tier__table caption {
  caption-side: top;
  text-align: left;
  padding-bottom: 10px;
  color: var(--ink-400);
}

.page-faq .faq-tier__table th,
.page-faq .faq-tier__table td {
  text-align: left;
  vertical-align: top;
  padding: 12px 14px;
}

.page-faq .faq-tier__side {
  display: grid;
  gap: 12px;
  align-content: start;
}

.page-faq .faq-tier__side-text {
  margin: 0;
  max-width: 34em;
  color: var(--ink-400);
  font-size: 15px;
  line-height: 1.75;
}

.page-faq .faq-tier__side .btn {
  justify-self: start;
}

@media (min-width: 960px) {
  .page-faq .faq-tier__body {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    gap: clamp(26px, 3.6vw, 52px);
    align-items: start;
  }
}

/* ---------- 记录与更正 ---------- */
.page-faq .faq-correct {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--faq-gap);
}

.page-faq .faq-correct__lead {
  margin: 0 0 clamp(20px, 3vw, 32px);
  max-width: 34em;
  color: var(--ink-on-sand);
  font-size: 17px;
  line-height: 2;
}

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

.page-faq .faq-step {
  border-top: 1px solid var(--sand-edge);
  padding: 16px 0 18px;
}

.page-faq .faq-step__num {
  display: block;
  margin-bottom: 6px;
  color: var(--coral);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
}

.page-faq .faq-step h3 {
  margin: 0 0 8px;
  color: var(--ink-on-sand);
}

.page-faq .faq-step p {
  margin: 0;
  max-width: 36em;
  color: var(--ink-on-sand);
  font-size: 16px;
  line-height: 1.9;
}

.page-faq .faq-correct__foot {
  margin: clamp(20px, 3vw, 30px) 0 0;
  max-width: 34em;
  color: var(--ink-on-sand);
  font-size: 15px;
  line-height: 2;
}

.page-faq .section--sand .faq__go {
  border-bottom-color: rgba(22, 35, 59, .45);
  color: var(--ink-on-sand);
}

.page-faq .section--sand .faq__go:hover {
  border-bottom-color: var(--ink-on-sand);
}

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

.page-faq .faq-correct__figure img {
  border: 1px solid var(--sand-edge);
}

.page-faq .section--sand .media__cap {
  color: var(--sand-soft);
}

@media (min-width: 900px) {
  .page-faq .faq-correct {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    gap: clamp(26px, 4vw, 56px);
    align-items: start;
  }
}

/* ---------- 收束 ---------- */
.page-faq .faq-exit {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--faq-gap);
}

.page-faq .faq-exit__panel {
  display: grid;
  gap: 12px;
  align-content: start;
}

.page-faq .faq-exit__label {
  margin: 0;
  color: var(--mono-lime);
}

.page-faq .faq-exit__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
  color: var(--mist);
  font-size: 15px;
  line-height: 1.7;
  overflow-wrap: anywhere;
}

.page-faq .faq-exit__list .mono {
  display: inline-block;
  min-width: 44px;
  color: var(--ink-400);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
}

.page-faq .faq-exit__note {
  margin: 0;
  max-width: 34em;
  color: var(--ink-400);
  font-size: 14px;
  line-height: 1.75;
}

.page-faq .faq-exit__panel .btn {
  justify-self: start;
}

.page-faq .faq-exit__links {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
  border-top: var(--rule);
}

.page-faq .faq-exit__links li {
  border-bottom: var(--rule);
  padding-bottom: 12px;
}

@media (min-width: 900px) {
  .page-faq .faq-exit {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: clamp(26px, 4vw, 56px);
    align-items: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item,
  .page-faq .faq__mark::before,
  .page-faq .faq__mark::after,
  .page-faq .faq__go {
    transition: none;
  }
}
</main>