.page-faq {
  --faq-ink-soft: rgba(244, 241, 232, 0.76);
  --faq-ink-quiet: rgba(244, 241, 232, 0.5);
  --faq-line: rgba(110, 122, 118, 0.34);
  display: block;
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: 26px 0 84px;
  background: linear-gradient(168deg, var(--green) 0%, var(--green-deep) 68%, #05201a 100%);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 0 calc(100% - 36px));
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(to right, rgba(244, 241, 232, 0.07) 0 1px, transparent 1px 72px),
    repeating-linear-gradient(to bottom, rgba(244, 241, 232, 0.07) 0 1px, transparent 1px 72px);
}

.page-faq .faq-hero > .wrap {
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero .breadcrumb__link {
  color: rgba(244, 241, 232, 0.62);
}

.page-faq .faq-hero .breadcrumb__link:hover,
.page-faq .faq-hero .breadcrumb__link:focus-visible {
  color: var(--amber-light);
}

.page-faq .faq-hero .breadcrumb__current {
  color: var(--paper);
}

.page-faq .faq-hero .breadcrumb__sep {
  color: rgba(244, 241, 232, 0.32);
}

.page-faq .faq-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
  margin-top: 30px;
}

.page-faq .faq-hero__coord {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--amber);
  padding-left: 14px;
  border-left: 2px solid var(--amber);
}

.page-faq .faq-hero__title {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(36px, 8.4vw, 70px);
  line-height: 1.04;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-faq .faq-hero__lead {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--faq-ink-soft);
}

.page-faq .faq-brief {
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: rgba(244, 241, 232, 0.14);
  border: 1px solid rgba(244, 241, 232, 0.14);
}

.page-faq .faq-brief__item {
  background: rgba(7, 42, 32, 0.72);
  padding: 12px 14px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-faq .faq-brief__k {
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--faq-ink-quiet);
}

.page-faq .faq-brief__v {
  font-size: 22px;
  font-weight: 600;
  color: var(--amber-light);
  line-height: 1;
}

/* ---------- 主体两栏 ---------- */

.page-faq .faq-body {
  padding: 12px 0 0;
  background: var(--ink);
}

.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 34px;
  padding-bottom: 72px;
}

/* 左侧分组索引 */

.page-faq .faq-index {
  border-top: 2px solid var(--green);
  padding-top: 14px;
}

.page-faq .faq-index__label {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--grey);
}

.page-faq .faq-index__list {
  margin: 0;
  padding: 0 0 8px;
  list-style: none;
  display: flex;
  flex-wrap: nowrap;
  gap: 2px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-faq .faq-index__link {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 10px 12px;
  white-space: nowrap;
  text-decoration: none;
  font-size: 13px;
  color: var(--grey);
  border-left: 2px solid transparent;
  border-bottom: 1px solid var(--faq-line);
  transition: color 160ms var(--ease), border-color 160ms var(--ease), background-color 160ms var(--ease);
}

.page-faq .faq-index__num {
  font-size: 11px;
  color: rgba(110, 122, 118, 0.9);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--paper);
  border-left-color: var(--amber);
  background: rgba(242, 160, 61, 0.08);
}

.page-faq .faq-index__link:hover .faq-index__num,
.page-faq .faq-index__link:focus-visible .faq-index__num {
  color: var(--amber);
}

.page-faq .faq-index__tip {
  margin: 16px 0 0;
  padding-left: 12px;
  border-left: 1px solid var(--faq-line);
  font-size: 12px;
  line-height: 1.7;
  color: var(--grey);
}

/* 右侧问答区 */

.page-faq .faq-group {
  scroll-margin-top: calc(var(--nav-h) + 28px);
}

.page-faq .faq-group + .faq-group {
  position: relative;
  margin-top: 56px;
  padding-top: 40px;
}

.page-faq .faq-group + .faq-group::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 7px;
  background-image: repeating-linear-gradient(to right, var(--faq-line) 0 1px, transparent 1px 8px);
}

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: baseline;
  gap: 6px 14px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .faq-group__num {
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--amber);
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(21px, 4.6vw, 30px);
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-faq .faq-group__note {
  grid-column: 2;
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--grey);
}

/* 图 */

.page-faq .faq-figure {
  margin: 22px 0 0;
}

.page-faq .faq-figure__box {
  position: relative;
  overflow: hidden;
  background: var(--ink-2);
  border: 1px solid var(--faq-line);
}

.page-faq .faq-figure__box::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(to right, rgba(244, 241, 232, 0.05) 0 1px, transparent 1px 40px),
    repeating-linear-gradient(to bottom, rgba(244, 241, 232, 0.05) 0 1px, transparent 1px 40px);
}

.page-faq .faq-figure__box img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-faq .faq-figure__cap {
  margin: 10px 0 0;
  font-size: 12px;
  line-height: 1.7;
  color: var(--grey);
  padding-left: 12px;
  border-left: 1px solid var(--amber);
}

.page-faq .faq-split {
  margin-top: 22px;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
}

.page-faq .faq-split__lead {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--faq-ink-soft);
}

.page-faq .faq-figure--side {
  margin-top: 0;
}

.page-faq .faq-figure--side .faq-figure__box {
  border-left: 2px solid var(--volt);
}

/* 问答条目 */

.page-faq .faq-list {
  margin-top: 8px;
}

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

.page-faq .qa__q {
  display: grid;
  grid-template-columns: 12px minmax(0, 1fr) 14px;
  align-items: start;
  gap: 14px;
  padding: 18px 2px;
  cursor: pointer;
  list-style: none;
  transition: background-color 160ms var(--ease);
}

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

.page-faq .qa__q:hover,
.page-faq .qa__q:focus-visible {
  background: rgba(244, 241, 232, 0.035);
}

.page-faq .qa__dot {
  width: 8px;
  height: 8px;
  margin-top: 8px;
  border-radius: 50%;
  background: var(--grey);
  transition: background-color 200ms var(--ease), box-shadow 200ms var(--ease);
}

.page-faq .qa[open] .qa__dot {
  background: var(--ok);
  box-shadow: 0 0 0 3px rgba(53, 208, 127, 0.18);
}

.page-faq .qa__text {
  font-size: 15px;
  line-height: 1.6;
  color: var(--paper);
  font-weight: 500;
}

.page-faq .qa[open] .qa__text {
  color: var(--amber-light);
}

.page-faq .qa__sign {
  position: relative;
  width: 14px;
  height: 14px;
  margin-top: 6px;
}

.page-faq .qa__sign::before,
.page-faq .qa__sign::after {
  content: "";
  position: absolute;
  background: var(--amber);
  transition: transform 200ms var(--ease), opacity 200ms var(--ease);
}

.page-faq .qa__sign::before {
  left: 0;
  right: 0;
  top: 50%;
  height: 1px;
  transform: translateY(-50%);
}

.page-faq .qa__sign::after {
  top: 0;
  bottom: 0;
  left: 50%;
  width: 1px;
  transform: translateX(-50%);
}

.page-faq .qa[open] .qa__sign::after {
  transform: translateX(-50%) scaleY(0);
  opacity: 0;
}

.page-faq .qa__a {
  padding: 0 10px 22px 40px;
}

.page-faq .qa__a p {
  margin: 0 0 10px;
  max-width: 62ch;
  font-size: 14px;
  line-height: 1.85;
  color: var(--faq-ink-soft);
}

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

.page-faq .faq-steps {
  margin: 0 0 14px;
  padding: 4px 0 4px 16px;
  list-style: none;
  border-left: 1px solid var(--faq-line);
}

.page-faq .faq-steps li {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  gap: 10px;
  padding: 5px 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--faq-ink-soft);
}

.page-faq .faq-steps .num {
  font-size: 12px;
  color: var(--amber);
}

.page-faq .faq-link {
  color: var(--amber-light);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 196, 107, 0.5);
  transition: color 160ms var(--ease), border-color 160ms var(--ease);
}

.page-faq .faq-link:hover,
.page-faq .faq-link:focus-visible {
  color: var(--amber);
  border-bottom-color: var(--amber);
}

/* ---------- 收尾 ---------- */

.page-faq .faq-tail {
  padding: 0 0 76px;
  background: var(--ink);
}

.page-faq .faq-tail__box {
  border: 1px solid var(--faq-line);
  border-left: 4px solid var(--green);
  padding: 24px 20px;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
  background: linear-gradient(120deg, rgba(12, 59, 46, 0.32) 0%, rgba(16, 19, 20, 0) 62%);
}

.page-faq .faq-tail__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 20px;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-faq .faq-tail__body {
  margin: 0;
  max-width: 62ch;
  font-size: 14px;
  line-height: 1.85;
  color: var(--faq-ink-soft);
}

.page-faq .faq-tail__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-content: start;
}

/* ---------- 响应式 ---------- */

@media (min-width: 720px) {
  .page-faq .faq-hero {
    padding: 34px 0 96px;
  }

  .page-faq .faq-brief {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .page-faq .faq-group__note {
    grid-column: auto;
    justify-self: end;
  }

  .page-faq .faq-figure__box img {
    max-height: 420px;
  }

  .page-faq .faq-split {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: start;
    gap: 28px;
  }

  .page-faq .faq-tail__box {
    padding: 30px 28px;
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    align-items: center;
  }

  .page-faq .faq-tail__links {
    justify-content: flex-end;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 52px;
    align-items: end;
  }

  .page-faq .faq-layout {
    grid-template-columns: 246px minmax(0, 1fr);
    gap: 56px;
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--nav-h) + 24px);
    align-self: start;
  }

  .page-faq .faq-index__list {
    flex-direction: column;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-index__link {
    border-bottom: none;
    border-left: 2px solid transparent;
    padding: 11px 10px 11px 14px;
    white-space: normal;
  }

  .page-faq .qa__a {
    padding-left: 44px;
  }
}

@media (min-width: 1180px) {
  .page-faq .faq-group + .faq-group {
    margin-top: 68px;
    padding-top: 48px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-index__link,
  .page-faq .qa__q,
  .page-faq .qa__dot,
  .page-faq .qa__sign::before,
  .page-faq .qa__sign::after,
  .page-faq .faq-link {
    transition: none;
  }
}
</main>