.page-faq {
  --faq-measure: 760px;
  --faq-no: 3rem;
  background: var(--bg);
  color: var(--fg);
}

.page-faq .faq-crumbs {
  padding-top: 20px;
  padding-bottom: 20px;
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  background: var(--crimson-700);
  color: var(--cream-50);
  overflow: hidden;
  isolation: isolate;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--line-cream) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-cream) 1px, transparent 1px);
  background-size: 44px 44px;
  opacity: 0.55;
  pointer-events: none;
  z-index: -1;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  right: -60px;
  bottom: -90px;
  width: 260px;
  height: 260px;
  border: 1px solid var(--line-cream);
  box-shadow:
    inset 0 0 0 22px transparent,
    inset 0 0 0 23px var(--line-cream),
    inset 0 0 0 46px transparent,
    inset 0 0 0 47px var(--line-cream);
  pointer-events: none;
  z-index: -1;
}

.page-faq .faq-hero__inner {
  padding-top: 40px;
  padding-bottom: 44px;
}

.page-faq .faq-hero__label {
  color: var(--gold-300);
  margin: 0 0 16px;
}

.page-faq .faq-hero__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.4rem, 10vw, 4.6rem);
  line-height: 0.95;
  letter-spacing: -0.02em;
  background: linear-gradient(180deg, var(--gold-300) 0%, var(--gold-600) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.page-faq .faq-hero__lead {
  max-width: 44ch;
  margin: 20px 0 0;
  font-size: 16px;
  line-height: 1.75;
  color: rgba(251, 247, 239, 0.92);
}

.page-faq .faq-hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line-cream);
}

.page-faq .faq-hero__stat {
  flex: 1 1 0;
  min-width: 96px;
  padding: 14px 14px 0 0;
  border-right: 1px solid var(--line-cream);
}

.page-faq .faq-hero__stat:last-child {
  border-right: 0;
  padding-right: 0;
}

.page-faq .faq-hero__num {
  display: block;
  font-size: 28px;
  color: var(--gold-300);
  line-height: 1;
}

.page-faq .faq-hero__unit {
  display: block;
  margin-top: 6px;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: rgba(251, 247, 239, 0.7);
}

/* ---------- 分组索引 ---------- */

.page-faq .faq-index {
  padding-top: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-index__head {
  max-width: 60ch;
}

.page-faq .faq-index__title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.6rem, 5.5vw, 2.5rem);
  line-height: 1.15;
  letter-spacing: -0.01em;
}

.page-faq .faq-index__note {
  margin: 12px 0 0;
  color: var(--slate-500);
  font-size: 15px;
  line-height: 1.75;
}

.page-faq .faq-index__wall {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
  background: var(--line-strong);
  border: 1px solid var(--line-strong);
}

.page-faq .faq-index__cell {
  background: var(--parchment-100);
}

.page-faq .faq-tag {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 12px;
  padding: 18px 18px;
  color: var(--ink-900);
  text-decoration: none;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-faq .faq-tag__no {
  color: var(--gold-900);
  font-size: 13px;
  padding: 3px 8px;
  border: 1px solid var(--line-gold);
}

.page-faq .faq-tag__name {
  font-size: 17px;
  font-weight: 600;
}

.page-faq .faq-tag__range {
  font-size: 12px;
  color: var(--slate-500);
}

.page-faq .faq-tag:hover,
.page-faq .faq-tag:focus-visible {
  background: var(--crimson-700);
  color: var(--cream-50);
  outline: none;
}

.page-faq .faq-tag:hover .faq-tag__no,
.page-faq .faq-tag:focus-visible .faq-tag__no {
  color: var(--gold-300);
  border-color: var(--line-cream);
}

.page-faq .faq-tag:hover .faq-tag__range,
.page-faq .faq-tag:focus-visible .faq-tag__range {
  color: rgba(251, 247, 239, 0.72);
}

.page-faq .faq-tag:focus-visible {
  box-shadow: inset 0 0 0 2px var(--gold-600);
}

/* ---------- 分组通用 ---------- */

.page-faq .faq-group {
  padding-top: 44px;
  padding-bottom: 52px;
}

.page-faq .faq-group--parch {
  background: var(--parchment-100);
}

.page-faq .faq-group__head {
  max-width: 62ch;
  margin-bottom: 26px;
}

.page-faq .faq-group__title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.5rem, 5vw, 2.2rem);
  line-height: 1.2;
  letter-spacing: -0.01em;
}

.page-faq .faq-group__note {
  margin: 10px 0 0;
  color: var(--slate-500);
  font-size: 15px;
  line-height: 1.75;
}

.page-faq .faq-figure {
  margin: 0 0 30px;
}

/* ---------- 深红分隔带 ---------- */

.page-faq .faq-band {
  position: relative;
  height: 10px;
  background: var(--crimson-700);
  border-top: 1px solid var(--gold-900);
  border-bottom: 1px solid var(--gold-900);
}

.page-faq .faq-band::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 96px;
  height: 1px;
  background: var(--gold-600);
  transform: translateY(-50%);
}

.page-faq .faq-band::after {
  content: "";
  position: absolute;
  right: 0;
  top: 50%;
  width: 14px;
  height: 1px;
  background: var(--gold-600);
  transform: translateY(-50%);
}

/* ---------- 问答条目 ---------- */

.page-faq .faq-list {
  max-width: var(--faq-measure);
  margin: 0 auto;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

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

.page-faq .faq-item details {
  padding: 0;
}

.page-faq .faq-item summary {
  display: grid;
  grid-template-columns: var(--faq-no) 1fr 1.4rem;
  align-items: start;
  gap: 10px;
  padding: 15px 0;
  cursor: pointer;
  list-style: none;
  transition: color var(--dur) var(--ease);
}

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

.page-faq .faq-item summary::marker {
  content: "";
}

.page-faq .faq-item summary:hover {
  color: var(--crimson-500);
}

.page-faq .faq-item summary:focus-visible {
  outline: 2px solid var(--gold-600);
  outline-offset: 2px;
}

.page-faq .faq-item__no {
  color: var(--gold-900);
  font-size: 13px;
  padding-top: 4px;
}

.page-faq .faq-item__q {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.65;
}

.page-faq .faq-item summary::after {
  content: "";
  justify-self: end;
  margin-top: 6px;
  width: 11px;
  height: 11px;
  border: 1px solid var(--gold-600);
  background-image:
    linear-gradient(var(--gold-600), var(--gold-600)),
    linear-gradient(var(--gold-600), var(--gold-600));
  background-size: 5px 1px, 1px 5px;
  background-position: center center;
  background-repeat: no-repeat;
  transition: background-size 220ms var(--ease);
}

.page-faq .faq-item details[open] summary::after {
  background-size: 5px 1px, 1px 0;
}

.page-faq .faq-item details[open] summary .faq-item__q {
  color: var(--crimson-700);
}

.page-faq .faq-item__a {
  padding: 0 1.4rem 20px calc(var(--faq-no) + 10px);
}

.page-faq .faq-item__a p {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--umber-700);
}

.page-faq .faq-item__a a {
  color: var(--gold-900);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

.page-faq .faq-item__a a:hover,
.page-faq .faq-item__a a:focus-visible {
  color: var(--crimson-500);
}

/* ---------- 现象对照表 ---------- */

.page-faq .faq-diag-wrap {
  max-width: var(--faq-measure);
  margin: 32px auto 0;
}

.page-faq .faq-diag {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

.page-faq .faq-diag__cap {
  caption-side: top;
  text-align: left;
  padding-bottom: 12px;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--slate-500);
}

.page-faq .faq-diag th {
  font-size: 12px;
  letter-spacing: 0.18em;
  font-weight: 500;
  color: var(--gold-900);
  padding: 0 12px 10px 0;
  border-bottom: 1px solid var(--line-strong);
}

.page-faq .faq-diag td {
  padding: 14px 12px 14px 0;
  font-size: 15px;
  line-height: 1.7;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
  color: var(--umber-700);
}

.page-faq .faq-diag td:first-child {
  color: var(--ink-900);
  font-weight: 600;
  width: 38%;
}

/* ---------- 提交方式 ---------- */

.page-faq .faq-submit {
  color: var(--cream-50);
  padding-top: 44px;
  padding-bottom: 48px;
}

.page-faq .faq-submit__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}

.page-faq .faq-submit__label {
  color: var(--gold-300);
  margin: 0 0 12px;
}

.page-faq .faq-submit__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.5rem, 5vw, 2.2rem);
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--cream-50);
}

.page-faq .faq-submit__text {
  margin: 14px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(251, 247, 239, 0.8);
}

.page-faq .faq-submit__sub {
  margin: 0 0 14px;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--gold-300);
}

.page-faq .faq-submit__items {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line-cream);
}

.page-faq .faq-submit__items li {
  padding: 14px 0;
  border-bottom: 1px solid var(--line-cream);
  font-size: 15px;
  line-height: 1.75;
  color: rgba(251, 247, 239, 0.9);
}

.page-faq .faq-submit__items .data-num {
  color: var(--gold-300);
  margin-right: 10px;
  font-size: 13px;
}

.page-faq .faq-submit__foot {
  margin: 16px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(251, 247, 239, 0.68);
}

/* ---------- 响应式 ---------- */

@media (min-width: 640px) {
  .page-faq {
    --faq-no: 4.2rem;
  }

  .page-faq .faq-crumbs {
    padding-top: 24px;
    padding-bottom: 24px;
  }

  .page-faq .faq-hero__inner {
    padding-top: 56px;
    padding-bottom: 60px;
  }

  .page-faq .faq-hero__lead {
    font-size: 17px;
    margin-top: 24px;
  }

  .page-faq .faq-hero__num {
    font-size: 34px;
  }

  .page-faq .faq-index {
    padding-top: 64px;
    padding-bottom: 64px;
  }

  .page-faq .faq-index__wall {
    grid-template-columns: repeat(2, 1fr);
    margin-top: 34px;
  }

  .page-faq .faq-tag {
    padding: 22px 22px;
    gap: 16px;
  }

  .page-faq .faq-tag__name {
    font-size: 19px;
  }

  .page-faq .faq-group {
    padding-top: 60px;
    padding-bottom: 68px;
  }

  .page-faq .faq-group__head {
    margin-bottom: 34px;
  }

  .page-faq .faq-figure {
    margin-bottom: 40px;
  }

  .page-faq .faq-item summary {
    gap: 16px;
    padding: 18px 0;
  }

  .page-faq .faq-item__q {
    font-size: 17px;
  }

  .page-faq .faq-item__a {
    padding-bottom: 24px;
    padding-right: 2.4rem;
  }

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

  .page-faq .faq-submit {
    padding-top: 56px;
    padding-bottom: 60px;
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-index__wall {
    grid-template-columns: repeat(4, 1fr);
  }

  .page-faq .faq-tag {
    grid-template-columns: 1fr;
    gap: 8px;
    align-content: start;
    padding: 24px 20px 26px;
  }

  .page-faq .faq-tag__range {
    margin-top: 4px;
  }

  .page-faq .faq-hero__inner {
    padding-top: 68px;
    padding-bottom: 72px;
  }

  .page-faq .faq-hero__lead {
    margin-top: 28px;
  }

  .page-faq .faq-submit__inner {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
    gap: 56px;
    align-items: start;
  }
}

@media (max-width: 639px) {
  .page-faq .faq-diag thead {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
  }

  .page-faq .faq-diag,
  .page-faq .faq-diag tbody,
  .page-faq .faq-diag tr,
  .page-faq .faq-diag td {
    display: block;
    width: 100%;
  }

  .page-faq .faq-diag tr {
    padding: 14px 0;
    border-bottom: 1px solid var(--line);
  }

  .page-faq .faq-diag td {
    padding: 2px 0;
    border-bottom: 0;
  }

  .page-faq .faq-diag td:first-child {
    width: auto;
    margin-bottom: 4px;
  }

  .page-faq .faq-diag td:last-child {
    color: var(--slate-500);
    font-size: 14px;
  }
}

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