.page-faq {
  --faq-index-w: 248px;
  --faq-rule: rgba(138, 147, 163, 0.26);
  --faq-rule-strong: rgba(138, 147, 163, 0.46);
  --faq-ink-line: rgba(4, 16, 28, 0.2);
  background: var(--ink);
  color: var(--paper);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(22px, 4vw, 44px) 0 clamp(44px, 7vw, 84px);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan) 0%, rgba(46, 216, 230, 0.1) 52%, transparent 78%);
  opacity: 0.55;
}

.page-faq .faq-crumb-sep {
  color: var(--flame);
}

.page-faq .faq-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 52px);
  align-items: end;
  margin-top: clamp(22px, 3vw, 36px);
}

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

.page-faq .faq-hero__acts {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: clamp(22px, 3vw, 32px);
}

.page-faq .faq-hero__figure {
  margin: 0;
  min-width: 0;
}

.page-faq .faq-facts {
  margin: clamp(30px, 5vw, 56px) 0 0;
  padding-top: 20px;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  border-top: 2px solid var(--faq-rule);
}

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

.page-faq .faq-fact dt {
  margin: 0 0 6px;
  font-size: 11px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--rock);
}

.page-faq .faq-fact dd {
  margin: 0;
  font-size: clamp(15px, 1.6vw, 18px);
  font-weight: 700;
  letter-spacing: 0.01em;
}

/* ---------- 问题主体 ---------- */
.page-faq .faq-body {
  padding: clamp(44px, 6.5vw, 88px) 0 clamp(48px, 7vw, 96px);
}

.page-faq .faq-body__title {
  margin: 0 0 clamp(26px, 3.5vw, 46px);
  font-size: clamp(26px, 3.6vw, 44px);
  font-weight: 900;
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: var(--paper);
  transform: skewX(-2deg);
}

.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3vw, 44px);
  align-items: start;
}

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

.page-faq .faq-index__label {
  margin: 0 0 12px;
  font-size: 11px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--rock);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0 0 6px;
  display: flex;
  flex-wrap: nowrap;
  gap: 10px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-index__item {
  flex: 0 0 auto;
}

.page-faq .faq-index__item a {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  padding: 8px 16px;
  border: 2px solid var(--faq-rule);
  background: var(--ink-2);
  color: rgba(245, 242, 234, 0.76);
  font-size: 14px;
  line-height: 1.3;
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.25s ease, border-color 0.25s ease, background-color 0.25s ease;
}

.page-faq .faq-index__item a:hover,
.page-faq .faq-index__item a:focus-visible {
  color: var(--paper);
  border-color: var(--cyan);
  background: rgba(46, 216, 230, 0.08);
}

.page-faq .faq-index__num {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--flame);
}

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

.page-faq .faq-group {
  padding-bottom: clamp(24px, 3vw, 38px);
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(26px, 3.5vw, 44px);
}

.page-faq .faq-group + .faq-group::before {
  content: "";
  display: block;
  height: 12px;
  margin-bottom: clamp(20px, 3vw, 30px);
  background: repeating-linear-gradient(118deg, var(--faq-rule-strong) 0 2px, transparent 2px 12px);
  opacity: 0.6;
}

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 8px;
}

.page-faq .faq-group__num {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--flame);
}

.page-faq .faq-group__title {
  margin: 0;
  font-size: clamp(20px, 2.4vw, 30px);
  font-weight: 900;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-faq .faq-group__desc {
  margin: 0 0 clamp(14px, 2vw, 22px);
  max-width: 620px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--rock);
}

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

.page-faq .faq-group__body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 34px);
  align-items: start;
}

.page-faq .faq-group__figure {
  margin: 0;
  min-width: 0;
}

/* ---------- 折叠问答 ---------- */
.page-faq .faq-item {
  border-bottom: 1px solid var(--faq-rule);
}

.page-faq .faq-item__q {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  min-height: 44px;
  padding: 16px 0;
  cursor: pointer;
  list-style: none;
  font-size: clamp(15px, 1.5vw, 17px);
  font-weight: 700;
  line-height: 1.5;
  color: var(--paper);
  transition: color 0.25s ease;
}

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

.page-faq .faq-item__q:hover {
  color: var(--cyan);
}

.page-faq .faq-item__mark {
  flex: 0 0 auto;
  width: 24px;
  height: 24px;
  margin-top: 1px;
  display: grid;
  place-items: center;
  border: 2px solid var(--faq-rule);
  color: var(--cyan);
  transition: transform 0.3s ease, border-color 0.3s ease, color 0.3s ease;
}

.page-faq .faq-item[open] .faq-item__mark {
  transform: rotate(90deg);
  border-color: var(--cyan);
}

.page-faq .faq-item__q:hover .faq-item__mark {
  border-color: var(--cyan);
}

.page-faq .faq-item__a {
  padding: 0 0 18px;
  max-width: 68ch;
  border-left: 2px solid transparent;
  padding-left: 0;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(245, 242, 234, 0.8);
}

.page-faq .faq-item[open] .faq-item__a {
  border-left-color: var(--cyan);
  padding-left: 16px;
  animation: faq-rise 0.38s ease both;
}

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

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

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

.page-faq .faq-item__a a:hover {
  color: var(--paper);
}

.page-faq .faq-key {
  font-family: var(--mono);
  font-weight: 800;
  color: var(--lime);
}

@keyframes faq-rise {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* ---------- 人工协助 ---------- */
.page-faq .faq-help {
  padding: clamp(48px, 7vw, 92px) 0;
  color: var(--black);
}

.page-faq .faq-help__title {
  margin: 0 0 10px;
  font-size: clamp(25px, 3.4vw, 42px);
  font-weight: 900;
  line-height: 1.16;
  letter-spacing: -0.02em;
  color: var(--black);
}

.page-faq .faq-help__lead {
  margin: 0 0 clamp(24px, 3vw, 38px);
  max-width: 640px;
  font-size: 17px;
  line-height: 1.75;
  color: rgba(4, 16, 28, 0.76);
}

.page-faq .faq-channels {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  border-top: 2px solid var(--faq-ink-line);
}

.page-faq .faq-channel {
  padding: 22px 0;
  border-bottom: 2px solid var(--faq-ink-line);
  min-width: 0;
}

.page-faq .faq-channel__key {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: rgba(4, 16, 28, 0.58);
}

.page-faq .faq-channel__body {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.78;
  color: var(--black);
}

.page-faq .faq-channel:last-child .faq-channel__body {
  margin-bottom: 0;
}

.page-faq .faq-channel__strong {
  font-family: var(--mono);
  font-weight: 800;
  letter-spacing: 0;
  word-break: break-word;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: clamp(36px, 5vw, 64px);
  }

  .page-faq .faq-layout {
    grid-template-columns: var(--faq-index-w) minmax(0, 1fr);
    gap: clamp(28px, 4vw, 56px);
  }

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

  .page-faq .faq-index__label {
    padding-left: 2px;
  }

  .page-faq .faq-index__list {
    display: block;
    padding-bottom: 0;
    overflow: visible;
    border-left: 2px solid var(--faq-rule);
  }

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

  .page-faq .faq-index__item a {
    min-height: 0;
    padding: 12px 4px 12px 16px;
    margin-left: -2px;
    border: 0;
    border-left: 3px solid transparent;
    background: transparent;
    white-space: normal;
    font-size: 15px;
  }

  .page-faq .faq-index__item a:hover,
  .page-faq .faq-index__item a:focus-visible {
    border-left-color: var(--flame);
    background: rgba(46, 216, 230, 0.06);
    color: var(--paper);
  }

  .page-faq .faq-channels {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .faq-channel {
    padding: 26px 26px 26px 0;
    border-bottom: 0;
    border-right: 2px solid var(--faq-ink-line);
  }

  .page-faq .faq-channel + .faq-channel {
    padding-left: 26px;
  }

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

@media (min-width: 1100px) {
  .page-faq .faq-group--venue .faq-group__body {
    grid-template-columns: minmax(0, 1fr) 320px;
    gap: clamp(28px, 3vw, 44px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item[open] .faq-item__a {
    animation: none;
  }

  .page-faq .faq-item__mark {
    transition: none;
  }
}