.page-faq {
  --faq-cut: 22px;
  background: var(--ink);
  color: var(--white);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  padding: calc(var(--header-h) + 40px) 0 clamp(56px, 7vw, 96px);
  background: linear-gradient(180deg, var(--char) 0%, var(--ink) 72%);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--line) 18%, var(--lime) 50%, var(--line) 82%, transparent);
  opacity: .55;
}

.page-faq .faq-hero-grid {
  display: grid;
  gap: 36px;
}

.page-faq .faq-kicker {
  margin: 26px 0 14px;
  color: var(--mist);
}

.page-faq .faq-hero-lead .h-page {
  max-width: 16ch;
  margin: 0;
}

.page-faq .faq-lede {
  margin: 0 0 26px;
  max-width: 46ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--mist);
}

.page-faq .faq-hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 18px 32px;
  margin: 0;
  padding: 20px 0 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-faq .faq-hero-stats li {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-faq .faq-hero-stats .data {
  font-size: 22px;
  color: var(--lime);
}

.page-faq .faq-stat-label {
  font-family: var(--font-index);
  font-size: 13px;
  letter-spacing: .14em;
  color: var(--mist);
}

.page-faq .faq-hero-media {
  margin: 48px auto 0;
}

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

/* ---------- 主体画布 ---------- */

.page-faq .faq-body {
  padding: clamp(56px, 8vw, 120px) 0 clamp(72px, 10vw, 160px);
  background: var(--char);
}

.page-faq .faq-layout {
  display: grid;
  gap: 44px;
}

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

/* ---------- 分类索引 ---------- */

.page-faq .faq-index-title {
  margin: 0 0 14px;
  color: var(--mist);
}

.page-faq .faq-index-list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}

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

.page-faq .faq-index-link {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 10px 16px;
  font-family: var(--font-index);
  font-size: 14px;
  letter-spacing: .08em;
  color: var(--mist);
  text-decoration: none;
  white-space: nowrap;
  background: var(--graphite);
  clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 0 100%);
  transition: color 180ms var(--ease), background 180ms var(--ease);
}

.page-faq .faq-index-link:hover,
.page-faq .faq-index-link:focus-visible {
  color: var(--white);
  background: #24302A;
}

.page-faq .faq-index-count {
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: .02em;
  color: var(--lime);
}

/* ---------- 问答分组 ---------- */

.page-faq .qa-group {
  margin: 0 0 clamp(52px, 7vw, 88px);
  scroll-margin-top: calc(var(--header-h) + 24px);
}

.page-faq .qa-group:last-child {
  margin-bottom: 0;
}

.page-faq .qa-group-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 6px 16px;
  align-items: baseline;
  padding-bottom: 18px;
  margin-bottom: 4px;
  border-bottom: 1px solid var(--line);
}

.page-faq .qa-group-num {
  font-family: var(--font-data);
  font-size: 13px;
  letter-spacing: .02em;
  color: var(--orange);
}

.page-faq .qa-group-title {
  margin: 0;
  font-family: var(--font-head);
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: .01em;
}

.page-faq .qa-group-note {
  grid-column: 2;
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
}

.page-faq .qa-group:target > .qa-group-head {
  border-bottom-color: var(--lime);
}

.page-faq .qa-group:target > .qa-group-head .qa-group-num {
  color: var(--lime);
}

.page-faq .qa-group-body {
  display: grid;
  gap: 32px;
}

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

/* ---------- 单条问答 ---------- */

.page-faq .qa-item {
  border-bottom: 1px solid var(--line);
  transition: background 200ms var(--ease);
}

.page-faq .qa-item[open] {
  background: linear-gradient(180deg, rgba(200, 255, 61, .05), rgba(200, 255, 61, 0) 62%);
}

.page-faq .qa-q {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 20px 4px;
  font-size: 16.5px;
  font-weight: 500;
  line-height: 1.6;
  color: var(--white);
  cursor: pointer;
  list-style: none;
  transition: color 180ms var(--ease);
}

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

.page-faq .qa-q:hover {
  color: var(--lime);
}

.page-faq .qa-q-text {
  flex: 1 1 auto;
  min-width: 0;
}

.page-faq .qa-q-mark {
  position: relative;
  flex: none;
  width: 20px;
  height: 20px;
  margin-top: 4px;
  color: var(--mist);
  transition: color 180ms var(--ease);
}

.page-faq .qa-q-mark::before,
.page-faq .qa-q-mark::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 12px;
  height: 1px;
  background: currentColor;
  transform-origin: center;
  transition: transform 200ms var(--ease);
}

.page-faq .qa-q-mark::before {
  transform: translate(-50%, -50%);
}

.page-faq .qa-q-mark::after {
  transform: translate(-50%, -50%) rotate(90deg);
}

.page-faq .qa-item[open] .qa-q-mark {
  color: var(--lime);
}

.page-faq .qa-item[open] .qa-q-mark::after {
  transform: translate(-50%, -50%) rotate(0deg);
}

.page-faq .qa-a {
  padding: 0 4px 28px;
}

.page-faq .qa-a p {
  margin: 0 0 14px;
  max-width: 66ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--pale);
}

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

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

.page-faq .hl {
  padding: 0 4px;
  color: var(--ink);
  font-weight: 500;
  background: var(--lime);
}

.page-faq .qa-steps {
  counter-reset: faqstep;
  display: grid;
  gap: 10px;
  margin: 16px 0 4px;
  padding: 0;
  list-style: none;
}

.page-faq .qa-steps li {
  position: relative;
  counter-increment: faqstep;
  padding-left: 36px;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--pale);
}

.page-faq .qa-steps li::before {
  content: counter(faqstep, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 1px;
  display: grid;
  place-items: center;
  width: 26px;
  height: 23px;
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: .02em;
  color: var(--lime);
  border: 1px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% 68%, 74% 100%, 0 100%);
}

.page-faq .qa-aside {
  margin: 0;
}

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

/* ---------- 横向提示条 ---------- */

.page-faq .faq-tip {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px 24px;
  margin: 0 0 clamp(52px, 7vw, 88px);
  padding: 24px 26px;
  background: var(--graphite);
  border-left: 3px solid var(--orange);
  clip-path: polygon(0 0, calc(100% - var(--faq-cut)) 0, 100% var(--faq-cut), 100% 100%, 0 100%);
}

.page-faq .faq-tip p {
  flex: 1 1 320px;
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--pale);
}

.page-faq .faq-tip--strong {
  border-left-color: var(--lime);
  background: linear-gradient(120deg, #22301F 0%, var(--graphite) 70%);
}

/* ---------- 联系区块 ---------- */

.page-faq .qa-group--contact {
  padding: 30px 26px 34px;
  background: linear-gradient(150deg, var(--graphite) 0%, var(--ink) 100%);
  clip-path: polygon(0 0, calc(100% - 34px) 0, 100% 34px, 100% 100%, 0 100%);
}

.page-faq .faq-reach {
  display: grid;
  gap: 18px;
  margin-top: 32px;
  padding-top: 26px;
  border-top: 1px solid var(--line);
}

.page-faq .faq-reach-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-faq .faq-reach-item .index-label {
  color: var(--mist);
}

.page-faq .faq-reach-value {
  font-size: 15px;
  color: var(--white);
  word-break: break-all;
}

/* ---------- 响应式 ---------- */

@media (min-width: 700px) {
  .page-faq .faq-reach {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero-grid {
    grid-template-columns: 1.15fr .85fr;
    gap: 64px;
    align-items: end;
  }

  .page-faq .faq-a {
    padding-left: 36px;
  }

  .page-faq .qa-group--android .qa-group-body {
    grid-template-columns: minmax(0, 1fr) 268px;
    gap: 48px;
    align-items: start;
  }
}

@media (min-width: 1025px) {
  .page-faq .faq-layout {
    grid-template-columns: 236px minmax(0, 1fr);
    gap: 72px;
    align-items: start;
  }

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

  .page-faq .faq-index-list {
    flex-direction: column;
    gap: 0;
    padding: 0;
    overflow: visible;
    border-left: 1px solid var(--line);
  }

  .page-faq .faq-index-link {
    background: transparent;
    clip-path: none;
    padding: 11px 14px;
    white-space: normal;
  }

  .page-faq .faq-index-link::before {
    content: "";
    position: absolute;
    left: -1px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--lime);
    transform: scaleY(0);
    transform-origin: top center;
    transition: transform 180ms var(--ease);
  }

  .page-faq .faq-index-link:hover,
  .page-faq .faq-index-link:focus-visible {
    background: transparent;
    color: var(--white);
  }

  .page-faq .faq-index-link:hover::before,
  .page-faq .faq-index-link:focus-visible::before {
    transform: scaleY(1);
  }

  .page-faq .faq-index-count {
    margin-left: auto;
  }
}

@media (min-width: 1180px) {
  .page-faq .qa-a {
    padding-left: 44px;
  }

  .page-faq .qa-group--android .qa-group-body {
    grid-template-columns: minmax(0, 1fr) 300px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa-q,
  .page-faq .qa-q-mark,
  .page-faq .qa-q-mark::before,
  .page-faq .qa-q-mark::after,
  .page-faq .qa-item,
  .page-faq .faq-index-link,
  .page-faq .faq-index-link::before {
    transition: none;
  }
}