.page-faq {
  --faq-line: var(--hair);
  --faq-desktop: var(--turf);
  --faq-mobile: var(--night-bright);
  --faq-any: var(--muted);
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  padding-bottom: 64px;
}

.page-faq .crumb {
  padding-top: 18px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding: 22px 0 36px;
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: 28px;
}

.page-faq .faq-hero__copy h1 {
  margin: 10px 0 0;
  font-family: var(--font-head);
  font-weight: 800;
  line-height: 1.2;
}

.page-faq .faq-hero__copy .lead {
  margin: 16px 0 0;
  max-width: 48ch;
  color: var(--muted);
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.page-faq .faq-hero__visual {
  position: relative;
  border: 1px solid var(--hair);
  box-shadow: 6px 6px 0 var(--paper-2);
  background: var(--paper);
}

.page-faq .faq-hero__visual::before {
  content: "";
  display: block;
  height: 6px;
  background: linear-gradient(90deg, var(--turf-deep) 0 55%, var(--night) 55% 100%);
}

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

/* ---------- 主题跳转条 ---------- */
.page-faq .faq-jump {
  border-top: 1px solid var(--hair);
  border-bottom: 1px solid var(--hair);
  background: var(--paper-2);
}

.page-faq .faq-jump__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 16px;
  padding-top: 14px;
  padding-bottom: 14px;
}

.page-faq .faq-jump__label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.page-faq .faq-jump__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .faq-jump__list a {
  display: inline-block;
  padding: 4px 10px;
  font-size: 13px;
  line-height: 1.5;
  color: var(--ink);
  text-decoration: none;
  background: var(--paper);
  border: 1px solid var(--hair);
  border-radius: 2px;
  transition: border-color var(--t-fast) linear, transform var(--t-fast) linear,
    box-shadow var(--t-fast) linear;
}

.page-faq .faq-jump__list a:hover,
.page-faq .faq-jump__list a:focus-visible {
  border-color: var(--turf);
  box-shadow: inset 0 0 0 1px var(--turf);
  transform: translateY(-2px);
}

/* ---------- 分组标题 ---------- */
.page-faq .faq-group {
  padding-top: 44px;
}

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  padding-bottom: 14px;
  margin-bottom: 22px;
  border-bottom: 1px solid var(--rule);
}

.page-faq .faq-group__head .sec-num {
  margin: 0;
  line-height: 1;
}

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

.page-faq .faq-group__title h2 {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 800;
}

.page-faq .faq-group__title p {
  margin: 8px 0 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--muted);
  max-width: 62ch;
}

/* ---------- 问答网格 ---------- */
.page-faq .faq-grid {
  display: grid;
  gap: 16px;
}

/* ---------- 问答卡片 ---------- */
.page-faq .qa {
  --accent: var(--faq-any);
  background: var(--paper);
  border: 1px solid var(--hair);
  border-left: 4px solid var(--accent);
  border-radius: 2px;
  box-shadow: 4px 4px 0 var(--paper-2);
  transition: transform var(--t-fast) linear, box-shadow var(--t-fast) linear;
}

.page-faq .qa--desktop {
  --accent: var(--faq-desktop);
}

.page-faq .qa--mobile {
  --accent: var(--faq-mobile);
}

.page-faq .qa:hover {
  transform: translateY(-2px);
}

.page-faq .qa[open] {
  box-shadow: 4px 4px 0 var(--paper-2), inset 0 0 0 1px var(--accent);
}

.page-faq .qa__q {
  display: grid;
  grid-template-columns: 62px minmax(0, 1fr) 18px;
  gap: 4px 12px;
  align-items: start;
  padding: 16px 16px 16px 14px;
  cursor: pointer;
  list-style: none;
}

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

.page-faq .qa__q::marker {
  content: "";
}

.page-faq .qa__lead {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 6px;
}

.page-faq .qa__num {
  font-family: var(--font-mono);
  font-size: 19px;
  font-weight: 500;
  letter-spacing: 0.02em;
  line-height: 1.1;
  color: var(--accent);
}

.page-faq .qa__label {
  font-size: 12px;
  line-height: 1.4;
  padding: 1px 6px;
  color: var(--ink);
  border: 1px solid var(--accent);
  border-radius: 2px;
  white-space: nowrap;
}

.page-faq .qa__text {
  padding-top: 2px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 17px;
  line-height: 1.45;
  color: var(--ink);
}

.page-faq .qa__mark {
  position: relative;
  width: 16px;
  height: 16px;
  margin-top: 4px;
}

.page-faq .qa__mark::before,
.page-faq .qa__mark::after {
  content: "";
  position: absolute;
  background: var(--accent);
  transition: transform var(--t-mid) linear;
}

.page-faq .qa__mark::before {
  left: 0;
  top: 7px;
  width: 16px;
  height: 2px;
}

.page-faq .qa__mark::after {
  left: 7px;
  top: 0;
  width: 2px;
  height: 16px;
}

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

.page-faq .qa__body {
  padding: 0 16px 18px 14px;
  border-top: 1px solid var(--hair);
}

.page-faq .qa[open] .qa__body {
  animation: faq-open var(--t-mid) linear;
}

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

/* ---------- 步骤条 ---------- */
.page-faq .faq-steps {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
}

.page-faq .faq-steps li {
  position: relative;
  padding: 0 0 14px 26px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink);
}

.page-faq .faq-steps li::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 20px;
  bottom: 0;
  width: 1px;
  background: var(--rule);
}

.page-faq .faq-steps li::after {
  content: "";
  position: absolute;
  left: 0;
  top: 5px;
  width: 11px;
  height: 11px;
  border: 1px solid var(--accent);
  border-radius: 2px;
  background: var(--paper);
}

.page-faq .faq-steps li:last-child {
  padding-bottom: 0;
}

.page-faq .faq-steps li:last-child::before {
  display: none;
}

/* ---------- 键盘索引区块 ---------- */
.page-faq .faq-keyboard {
  display: grid;
  gap: 20px;
  margin-top: 44px;
  padding: 20px;
  background: var(--night);
  border-radius: 2px;
}

.page-faq .faq-keyboard h3 {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 22px;
  line-height: 1.3;
  color: var(--paper);
}

.page-faq .faq-keyboard p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--on-dark);
}

.page-faq .faq-keyboard .media-frame {
  border: 1px solid rgba(247, 248, 246, 0.22);
  background: var(--turf-deep);
}

.page-faq .faq-keyboard .media-frame__note {
  color: var(--on-dark-soft);
}

/* ---------- 结尾引导 ---------- */
.page-faq .faq-cta {
  margin-top: 56px;
  border-top: 4px solid var(--turf);
  border-bottom: 1px solid var(--hair);
  background: var(--paper-2);
}

.page-faq .faq-cta__inner {
  display: grid;
  gap: 18px;
  padding-top: 30px;
  padding-bottom: 30px;
}

.page-faq .faq-cta__inner h2 {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 800;
}

.page-faq .faq-cta__inner p {
  margin: 10px 0 0;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

.page-faq .faq-cta__inner .btn {
  justify-self: start;
}

/* ---------- 断点 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
  }

  .page-faq .faq-cta__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 32px;
  }

  .page-faq .faq-cta__inner .btn {
    justify-self: end;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero {
    padding: 30px 0 46px;
  }

  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 48px;
    align-items: start;
  }

  .page-faq .faq-keyboard {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    gap: 32px;
    align-items: center;
    padding: 28px;
  }

  .page-faq .faq-group {
    padding-top: 52px;
  }

  .page-faq .faq-group__head {
    grid-template-columns: auto minmax(0, 1fr);
    gap: 20px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa,
  .page-faq .qa__mark::before,
  .page-faq .qa__mark::after,
  .page-faq .faq-jump__list a {
    transition: none;
  }

  .page-faq .qa:hover,
  .page-faq .faq-jump__list a:hover,
  .page-faq .faq-jump__list a:focus-visible {
    transform: none;
  }

  .page-faq .qa[open] .qa__body {
    animation: none;
  }
}