.page-faq {
  --faq-tint: rgba(18, 58, 38, .38);
  --faq-answer-ink: rgba(233, 239, 232, .78);
  background: var(--black);
  color: var(--lime-white);
  font-family: var(--font-sans);
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: calc(var(--header-h) + 40px) 0 52px;
  border-bottom: 1px solid var(--hairline);
  background:
    radial-gradient(120% 88% at 88% 4%, rgba(28, 87, 56, .62), transparent 62%),
    radial-gradient(70% 60% at 2% 100%, rgba(107, 91, 210, .16), transparent 70%),
    linear-gradient(180deg, var(--black) 0%, var(--night) 100%);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  right: -12%;
  bottom: 26px;
  width: 62%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(198, 255, 61, .38), transparent);
  transform: rotate(-11deg);
  transform-origin: right center;
  pointer-events: none;
}

.page-faq .faq-hero__inner {
  position: relative;
  display: grid;
  gap: 36px;
  align-items: end;
}

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

.page-faq .faq-hero__title {
  margin: 14px 0 18px;
  font-size: clamp(42px, 10vw, 84px);
  font-weight: 900;
  line-height: .94;
  letter-spacing: -.035em;
}

.page-faq .faq-hero__lead {
  max-width: 46ch;
  color: var(--faq-answer-ink);
}

.page-faq .faq-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 30px;
  margin: 30px 0 0;
  padding: 20px 0 0;
  border-top: 1px solid var(--hairline);
  list-style: none;
}

.page-faq .faq-hero__facts li {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-size: 13px;
  letter-spacing: .03em;
  color: var(--mist);
}

.page-faq .faq-hero__facts .num {
  font-family: var(--font-mono);
  font-size: 19px;
  letter-spacing: -.01em;
  color: var(--volt);
}

.page-faq .faq-hero__media {
  margin: 0;
  width: 100%;
  aspect-ratio: 1 / 1;
}

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

@media (min-width: 900px) {
  .page-faq .faq-hero {
    padding: calc(var(--header-h) + 68px) 0 72px;
  }

  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, .82fr);
    gap: 56px;
  }
}

/* ---------- 主体两栏 ---------- */

.page-faq .faq-body {
  display: grid;
  gap: 36px;
  padding-top: 56px;
  padding-bottom: 88px;
  align-items: start;
}

@media (min-width: 1024px) {
  .page-faq .faq-body {
    grid-template-columns: 232px minmax(0, 1fr);
    gap: 64px;
    padding-top: 76px;
    padding-bottom: 112px;
  }
}

/* ---------- 左侧问题目录 ---------- */

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

.page-faq .faq-index__label {
  margin: 0 0 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--hairline);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-faq .faq-index__tabs {
  display: flex;
  gap: 2px;
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
  padding-bottom: 2px;
}

.page-faq .faq-index__tabs::-webkit-scrollbar {
  display: none;
}

.page-faq .faq-index .anchor-tab {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: none;
  padding: 12px 14px;
  border-left: 2px solid transparent;
  text-decoration: none;
  white-space: nowrap;
  font-size: 14px;
  color: var(--mist);
  transition: color var(--dur) var(--ease),
              background-color var(--dur) var(--ease),
              border-color var(--dur) var(--ease);
}

.page-faq .faq-index__num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--hairline);
  transition: color var(--dur) var(--ease);
}

.page-faq .faq-index .anchor-tab:hover,
.page-faq .faq-index .anchor-tab:focus-visible {
  color: var(--lime-white);
  background: var(--faq-tint);
}

.page-faq .faq-index .anchor-tab:hover .faq-index__num,
.page-faq .faq-index .anchor-tab:focus-visible .faq-index__num {
  color: var(--volt);
}

.page-faq .faq-index .anchor-tab[aria-current="location"] {
  color: var(--lime-white);
  border-left-color: var(--volt);
  background: rgba(198, 255, 61, .07);
}

.page-faq .faq-index .anchor-tab[aria-current="location"] .faq-index__num {
  color: var(--volt);
}

@media (min-width: 1024px) {
  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--header-h) + 28px);
  }

  .page-faq .faq-index__tabs {
    flex-direction: column;
    overflow: visible;
    gap: 0;
  }

  .page-faq .faq-index .anchor-tab {
    white-space: normal;
    align-items: flex-start;
    line-height: 1.5;
  }
}

/* ---------- 答案区 ---------- */

.page-faq .faq-answers {
  min-width: 0;
  display: grid;
  gap: 72px;
}

.page-faq .faq-group {
  scroll-margin-top: calc(var(--header-h) + 32px);
}

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--hairline);
}

.page-faq .faq-group__index {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--volt);
}

.page-faq .faq-group__title {
  margin: 0;
  font-size: clamp(23px, 4.6vw, 34px);
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -.02em;
}

.page-faq .faq-group__note {
  margin: 18px 0 4px;
  max-width: 60ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 章节配图 ---------- */

.page-faq .faq-figure {
  margin: 26px 0 6px;
  width: 100%;
  aspect-ratio: 2 / 1;
}

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

/* ---------- 问答条目 ---------- */

.page-faq .faq-list {
  border-top: 1px solid var(--hairline);
}

.page-faq .faq-item {
  border-bottom: 1px solid var(--hairline);
  transition: background-color var(--dur) var(--ease);
}

.page-faq .faq-item[open] {
  background: rgba(198, 255, 61, .035);
}

.page-faq .faq-item > summary {
  display: grid;
  grid-template-columns: 26px minmax(0, 1fr) 18px;
  gap: 14px;
  align-items: start;
  padding: 20px 8px;
  cursor: pointer;
  list-style: none;
  transition: background-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,
.page-faq .faq-item > summary:focus-visible {
  background: var(--faq-tint);
  outline: none;
}

.page-faq .faq-item > summary:focus-visible {
  box-shadow: inset 0 0 0 1px var(--volt);
}

.page-faq .faq-item__num {
  padding-top: 4px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--mist);
}

.page-faq .faq-item__q {
  font-size: 17px;
  font-weight: 700;
  line-height: 1.55;
  letter-spacing: -.005em;
  color: var(--lime-white);
}

.page-faq .faq-item__mark {
  position: relative;
  width: 16px;
  height: 16px;
  margin-top: 6px;
}

.page-faq .faq-item__mark::before,
.page-faq .faq-item__mark::after {
  content: "";
  position: absolute;
  background: var(--mist);
  transition: transform var(--dur) var(--ease),
              background-color var(--dur) var(--ease);
}

.page-faq .faq-item__mark::before {
  top: 7px;
  left: 0;
  width: 16px;
  height: 1.5px;
}

.page-faq .faq-item__mark::after {
  top: 0;
  left: 7px;
  width: 1.5px;
  height: 16px;
}

.page-faq .faq-item[open] .faq-item__mark::before {
  background: var(--volt);
}

.page-faq .faq-item[open] .faq-item__mark::after {
  transform: scaleY(0);
}

.page-faq .faq-item__a {
  padding: 0 8px 24px 40px;
  max-width: 68ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--faq-answer-ink);
}

@media (max-width: 480px) {
  .page-faq .faq-item > summary {
    grid-template-columns: 22px minmax(0, 1fr) 16px;
    gap: 12px;
    padding: 18px 4px;
  }

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

  .page-faq .faq-item__a {
    padding: 0 4px 22px 34px;
    font-size: 15.5px;
  }
}

/* ---------- 结尾行动区 ---------- */

.page-faq .faq-more {
  position: relative;
  overflow: hidden;
  border-top: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
  background: linear-gradient(150deg, var(--grass-deep) 0%, var(--night) 100%);
}

.page-faq .faq-more::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
    -45deg,
    rgba(198, 255, 61, .06) 0 1px,
    transparent 1px 24px
  );
  pointer-events: none;
}

.page-faq .faq-more__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 32px;
  padding-top: 56px;
  padding-bottom: 56px;
}

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

.page-faq .faq-more__title {
  margin: 12px 0 14px;
  font-size: clamp(24px, 4.4vw, 36px);
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -.02em;
}

.page-faq .faq-more__text {
  margin: 0;
  max-width: 54ch;
  font-size: 15.5px;
  line-height: 1.8;
  color: rgba(233, 239, 232, .78);
}

.page-faq .faq-more__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 14px;
}

.page-faq .faq-more__links {
  flex-basis: 100%;
  margin: 6px 0 0;
  font-size: 13px;
  letter-spacing: .02em;
  color: var(--mist);
}

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

.page-faq .faq-more__links a:hover,
.page-faq .faq-more__links a:focus-visible {
  color: var(--volt);
  border-bottom-color: var(--volt);
}

@media (min-width: 900px) {
  .page-faq .faq-more__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 56px;
    padding-top: 72px;
    padding-bottom: 72px;
  }

  .page-faq .faq-more__actions {
    flex-direction: column;
    align-items: flex-end;
    gap: 14px;
  }

  .page-faq .faq-more__links {
    flex-basis: auto;
    text-align: right;
  }
}

/* ---------- 减弱动效 ---------- */

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-index .anchor-tab,
  .page-faq .faq-item,
  .page-faq .faq-item > summary,
  .page-faq .faq-item__mark::before,
  .page-faq .faq-item__mark::after,
  .page-faq .faq-more__links a {
    transition: none;
  }
}