.page-faq {
  --faq-rail-w: 236px;
  --faq-line: var(--mist);
  display: block;
  padding-top: calc(var(--header-h) + clamp(20px, 4vw, 46px));
  padding-bottom: clamp(48px, 7vw, 96px);
  background: var(--paper);
  color: var(--ink);
}

.page-faq .faq-shell {
  width: min(100% - var(--gutter) * 2, var(--wrap));
  margin-inline: auto;
}

/* ---------- 页头 ---------- */

.page-faq .faq-mast {
  position: relative;
  padding-bottom: clamp(20px, 3.4vw, 40px);
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .faq-mast::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: clamp(56px, 11vw, 152px);
  height: 3px;
  background: var(--gobi);
}

.page-faq .faq-mast .eyebrow {
  color: var(--gobi);
}

.page-faq .faq-mast__title {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(30px, 6.2vw, 60px);
  line-height: 1.06;
  letter-spacing: -0.02em;
  max-width: 18ch;
  text-wrap: balance;
}

.page-faq .faq-mast__lede {
  margin-top: clamp(14px, 2vw, 22px);
  max-width: 66ch;
  font-size: clamp(15px, 1.2vw, 16px);
  line-height: 1.8;
  color: var(--ink-soft);
}

.page-faq .faq-mast__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 10px;
  margin: clamp(18px, 2.6vw, 28px) 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-mast__meta li {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  border: 1px solid var(--faq-line);
  background: var(--paper-deep);
  font-size: 12px;
  line-height: 1.4;
  color: var(--slate);
}

.page-faq .faq-mast__meta .mono {
  color: var(--ink);
  font-size: 13px;
}

/* ---------- 布局 ---------- */

.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 48px);
  padding-top: clamp(26px, 4vw, 52px);
}

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

.page-faq .faq-rail__label {
  margin: 0 0 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--faq-line);
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--gobi);
}

.page-faq .faq-nav {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  overscroll-behavior-x: contain;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  padding-bottom: 6px;
}

.page-faq .faq-nav__link {
  flex: 0 0 auto;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 3px;
  min-height: 48px;
  padding: 8px 14px;
  border: 1px solid var(--faq-line);
  background: var(--paper-deep);
  color: var(--ink);
  text-decoration: none;
  font-size: 13px;
  line-height: 1.35;
  transition: background-color var(--t-base), border-color var(--t-base), transform var(--t-base);
}

.page-faq .faq-nav__link:hover {
  background: rgba(233, 197, 63, 0.25);
  border-color: var(--gobi);
  transform: translateX(2px);
}

.page-faq .faq-nav__link:focus-visible {
  outline: 2px solid var(--night);
  outline-offset: 2px;
}

.page-faq .faq-nav__code {
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--gobi);
}

.page-faq .faq-fig {
  margin: 20px 0 0;
}

.page-faq .faq-fig img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--faq-line);
  background: var(--paper-deep);
  filter: saturate(0.7) contrast(1.05);
}

.page-faq .faq-fig figcaption {
  margin-top: 8px;
  font-size: 12px;
  line-height: 1.65;
  color: var(--slate);
}

.page-faq .faq-fig--rail {
  padding-top: 18px;
  border-top: 1px solid var(--faq-line);
}

.page-faq .faq-fig--wide {
  margin-top: clamp(24px, 3.4vw, 40px);
}

/* ---------- 区块 ---------- */

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

.page-faq .faq-block + .faq-block {
  margin-top: clamp(34px, 5vw, 64px);
  padding-top: clamp(28px, 4vw, 48px);
  border-top: 1px solid var(--faq-line);
}

.page-faq .faq-block__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0 14px;
  align-items: baseline;
  margin-bottom: clamp(16px, 2.4vw, 26px);
}

.page-faq .faq-block__code {
  grid-row: 1;
  padding: 3px 8px;
  border: 1px solid var(--gobi);
  color: var(--gobi);
  font-size: 12px;
  letter-spacing: 0.05em;
  white-space: nowrap;
}

.page-faq .faq-block__title {
  grid-row: 1;
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(21px, 3.4vw, 30px);
  line-height: 1.16;
  letter-spacing: -0.015em;
}

.page-faq .faq-block__note {
  grid-column: 2;
  margin: 10px 0 0;
  max-width: 62ch;
  font-size: 14px;
  line-height: 1.75;
  color: var(--slate);
}

.page-faq .faq-block__tail {
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--faq-line);
  font-size: 14px;
  line-height: 1.75;
  color: var(--slate);
}

.page-faq .faq-block__tail a {
  color: var(--gobi);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-block__tail a:hover {
  color: var(--gobi-deep);
}

/* ---------- 问题条目 ---------- */

.page-faq .faq-block__items {
  display: block;
}

.page-faq .faq-item {
  position: relative;
  border: 1px solid var(--faq-line);
  background: var(--paper);
  box-shadow: 3px 3px 0 var(--faq-line);
  transition: box-shadow var(--t-base), border-color var(--t-base);
}

.page-faq .faq-item + .faq-item {
  margin-top: 10px;
}

.page-faq .faq-item[data-open],
.page-faq .faq-item:has(.faq-q__toggle[aria-expanded="true"]) {
  border-color: var(--ink);
  box-shadow: 5px 3px 0 var(--faq-line);
}

.page-faq .faq-item__h {
  margin: 0;
  font-size: inherit;
  font-weight: inherit;
}

.page-faq .faq-q__toggle {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  width: 100%;
  min-height: 56px;
  margin: 0;
  padding: 16px 18px;
  border: 0;
  background: transparent;
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
  transition: background-color var(--t-base);
}

.page-faq .faq-q__toggle:hover {
  background: rgba(233, 197, 63, 0.25);
}

.page-faq .faq-q__toggle:focus-visible {
  outline: 2px solid var(--night);
  outline-offset: -3px;
}

.page-faq .faq-q__code {
  flex: 0 0 auto;
  padding-top: 3px;
  font-size: 13px;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.05em;
  color: var(--gobi);
}

.page-faq .faq-q__label {
  flex: 1 1 auto;
  min-width: 0;
  font-size: clamp(15px, 1.6vw, 17px);
  font-weight: 600;
  line-height: 1.5;
  letter-spacing: -0.005em;
  color: var(--ink);
}

.page-faq .faq-q__mark {
  flex: 0 0 auto;
  width: 18px;
  height: 18px;
  margin-top: 4px;
  display: grid;
  place-items: center;
  border: 1px solid var(--faq-line);
  background: var(--paper-deep);
  transition: border-color var(--t-base), background-color var(--t-base);
}

.page-faq .faq-q__mark svg {
  display: block;
}

.page-faq .faq-q__mark path {
  fill: none;
  stroke: var(--slate);
  stroke-width: 2;
  stroke-linecap: square;
  stroke-linejoin: miter;
  transition: opacity var(--t-base), stroke var(--t-base);
}

.page-faq .faq-q__mark-check {
  opacity: 0;
}

.page-faq .faq-item[data-open] .faq-q__mark,
.page-faq .faq-item:has(.faq-q__toggle[aria-expanded="true"]) .faq-q__mark {
  border-color: var(--turf);
  background: rgba(46, 107, 75, 0.14);
}

.page-faq .faq-item[data-open] .faq-q__mark-plus,
.page-faq .faq-item:has(.faq-q__toggle[aria-expanded="true"]) .faq-q__mark-plus {
  opacity: 0;
}

.page-faq .faq-item[data-open] .faq-q__mark-check,
.page-faq .faq-item:has(.faq-q__toggle[aria-expanded="true"]) .faq-q__mark-check {
  opacity: 1;
  stroke: var(--turf);
}

.page-faq .faq-q__panel {
  border-top: 1px solid var(--faq-line);
  background: var(--paper-deep);
}

.page-faq .faq-q__panel[hidden] {
  display: none;
}

.page-faq .faq-q__body {
  padding: 16px 20px 20px 46px;
  max-width: 70ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.page-faq .faq-q__body p {
  margin: 0 0 10px;
}

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

.page-faq .faq-q__lede {
  padding-left: 12px;
  border-left: 2px solid var(--gobi);
  color: var(--ink);
  font-weight: 600;
}

.page-faq .faq-q__body a {
  color: var(--gobi);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-q__body a:hover {
  color: var(--gobi-deep);
}

.page-faq .faq-q__body a:focus-visible {
  outline: 2px solid var(--night);
  outline-offset: 2px;
}

/* ---------- 窄屏收束 ---------- */

@media (max-width: 560px) {
  .page-faq .faq-block__head {
    grid-template-columns: minmax(0, 1fr);
    gap: 10px;
  }

  .page-faq .faq-block__code {
    justify-self: start;
  }

  .page-faq .faq-block__note {
    grid-column: 1;
    margin-top: 4px;
  }

  .page-faq .faq-q__body {
    padding: 14px 16px 18px 18px;
  }

  .page-faq .faq-q__toggle {
    gap: 10px;
  }
}

/* ---------- 桌面 ---------- */

@media (min-width: 960px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
    gap: clamp(36px, 5vw, 76px);
  }

  .page-faq .faq-rail {
    position: sticky;
    top: calc(var(--header-h) + 22px);
  }

  .page-faq .faq-nav {
    display: block;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-nav__link {
    width: 100%;
    margin-bottom: 6px;
    padding: 10px 12px 10px 16px;
    border-color: transparent;
    border-left: 2px solid var(--faq-line);
    background: transparent;
  }

  .page-faq .faq-nav__link:hover {
    border-color: transparent;
    border-left-color: var(--gobi);
    background: rgba(233, 197, 63, 0.25);
    transform: translateX(2px);
  }

  .page-faq .faq-q__body {
    padding-left: 52px;
  }
}

@media (min-width: 1180px) {
  .page-faq .faq-fig--wide {
    margin-right: calc(-1 * clamp(0px, 4vw, 56px));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item,
  .page-faq .faq-nav__link,
  .page-faq .faq-q__toggle,
  .page-faq .faq-q__mark,
  .page-faq .faq-q__mark path {
    transition-property: color, background-color, border-color, box-shadow, opacity, stroke;
    transition-duration: 120ms;
  }

  .page-faq .faq-nav__link:hover {
    transform: none;
  }
}