.page-faq {
  --faq-idx: 236px;
  background: var(--ink);
  color: var(--text);
  padding-bottom: 78px;
}

.page-faq .faq-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
  padding: 26px 0 4px;
}

.page-faq .faq-hero h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(46px, 11vw, 104px);
  line-height: 0.94;
  letter-spacing: -0.02em;
  margin: 10px 0 0;
}

.page-faq .faq-hero__lede {
  margin: 18px 0 0;
  max-width: 32em;
  font-size: 17px;
  line-height: 1.75;
  color: var(--muted);
}

.page-faq .faq-hero__media {
  margin: 0;
  align-self: end;
}

@media (min-width: 900px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    align-items: end;
    gap: 48px;
    padding: 46px 0 10px;
  }
}

/* 四步操作小径 */
.page-faq .faq-trail {
  position: relative;
  margin-top: 36px;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.page-faq .faq-trail__line {
  display: none;
}

.page-faq .faq-step {
  position: relative;
  z-index: 1;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  padding: 16px 16px 18px;
  transition: transform var(--dur) ease, border-color var(--dur) ease;
}

.page-faq .faq-step:hover {
  transform: translateY(-2px);
  border-color: var(--line-hi);
}

.page-faq .faq-step__num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: var(--r-xs);
  background: var(--lime-mist);
  border: 1px solid var(--line-hi);
  color: var(--lime);
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 14px;
}

.page-faq .faq-step__title {
  margin: 12px 0 0;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 15.5px;
  line-height: 1.4;
}

.page-faq .faq-step__desc {
  margin: 6px 0 0;
  font-size: 14px;
  line-height: 1.65;
  color: var(--muted);
}

@media (min-width: 760px) {
  .page-faq .faq-trail {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 16px;
  }
  .page-faq .faq-trail__line {
    display: block;
    position: absolute;
    left: 0;
    right: 0;
    top: 46px;
    width: 100%;
    height: 2px;
    z-index: 0;
    color: var(--line);
    pointer-events: none;
  }
}

/* 主体两栏 */
.page-faq .faq-layout {
  margin-top: 52px;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
  align-items: start;
}

@media (min-width: 980px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-idx) minmax(0, 1fr);
    gap: 48px;
  }
}

/* 主题索引 */
.page-faq .faq-index {
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--ink-2);
  padding: 14px 14px 16px;
}

.page-faq .faq-index__title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--lime);
  text-transform: uppercase;
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: max-content;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: none;
}

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

.page-faq .faq-index__list a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 13px;
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  color: var(--muted);
  text-decoration: none;
  font-size: 14px;
  white-space: nowrap;
  transition: background var(--dur) ease, color var(--dur) ease, border-color var(--dur) ease;
}

.page-faq .faq-index__list a:hover,
.page-faq .faq-index__list a:focus-visible {
  background: var(--lime-mist);
  border-color: var(--line-hi);
  color: var(--text);
}

.page-faq .faq-index__list a:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 2px;
}

.page-faq .faq-index__num {
  display: none;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 12px;
  color: var(--lime);
}

@media (min-width: 980px) {
  .page-faq .faq-index {
    position: sticky;
    top: 96px;
    padding: 18px 16px;
  }
  .page-faq .faq-index__list {
    grid-auto-flow: row;
    grid-auto-columns: auto;
    gap: 2px;
    overflow: visible;
  }
  .page-faq .faq-index__list a {
    display: grid;
    grid-template-columns: 30px minmax(0, 1fr);
    align-items: baseline;
    gap: 8px;
    padding: 9px 10px;
    border: 0;
    border-left: 2px solid transparent;
    border-radius: var(--r-xs);
    font-size: 14.5px;
    white-space: normal;
  }
  .page-faq .faq-index__list a:hover,
  .page-faq .faq-index__list a:focus-visible {
    border-left-color: var(--lime);
  }
  .page-faq .faq-index__list a:focus-visible {
    outline-offset: -2px;
  }
  .page-faq .faq-index__num {
    display: inline;
  }
}

/* 分组 */
.page-faq .faq-group {
  scroll-margin-top: 108px;
}

.page-faq .faq-group + .faq-group {
  margin-top: 48px;
}

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

.page-faq .faq-group__code {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--lime);
  padding-top: 5px;
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: clamp(20px, 4.6vw, 26px);
  letter-spacing: 0.01em;
  line-height: 1.25;
}

.page-faq .faq-group__note {
  margin: 6px 0 0;
  font-size: 14px;
  line-height: 1.6;
  color: var(--muted);
}

.page-faq .faq-group__media {
  margin: 18px 0 4px;
}

/* 折叠问答 */
.page-faq .faq-q {
  margin-top: 10px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  transition: border-color var(--dur) ease;
}

.page-faq .faq-q:hover {
  border-color: var(--line-hi);
}

.page-faq .faq-q[open] {
  border-color: var(--line-hi);
  background: var(--surface-hi);
}

.page-faq .faq-q > summary {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  padding: 15px 16px;
  cursor: pointer;
  list-style: none;
  font-weight: 600;
  font-size: 15.5px;
  line-height: 1.5;
  color: var(--text);
  border-radius: var(--r-sm);
}

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

.page-faq .faq-q > summary:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: -2px;
  background: var(--lime-mist);
}

.page-faq .faq-q__sign {
  position: relative;
  flex: 0 0 auto;
  width: 20px;
  height: 20px;
  margin-top: 1px;
  border: 1px solid var(--line);
  border-radius: 6px;
  transition: border-color var(--dur) ease;
}

.page-faq .faq-q[open] .faq-q__sign {
  border-color: var(--line-hi);
}

.page-faq .faq-q__sign::before,
.page-faq .faq-q__sign::after {
  content: "";
  position: absolute;
  background: var(--lime);
  border-radius: 1px;
  transition: transform var(--dur) ease, opacity var(--dur) ease;
}

.page-faq .faq-q__sign::before {
  left: 4px;
  right: 4px;
  top: 8px;
  height: 2px;
}

.page-faq .faq-q__sign::after {
  top: 4px;
  bottom: 4px;
  left: 8px;
  width: 2px;
}

.page-faq .faq-q[open] .faq-q__sign::after {
  transform: rotate(90deg);
  opacity: 0;
}

.page-faq .faq-q__body {
  max-width: 38em;
  padding: 0 16px 17px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

.page-faq .faq-q__body p {
  margin: 0;
}

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

.page-faq .faq-q__body a:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 2px;
}

.page-faq .hl {
  display: inline-block;
  padding: 0 5px;
  border-radius: 4px;
  background: var(--lime-mist);
  color: var(--text);
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 14px;
}

/* 联系方式块 */
.page-faq .faq-contact {
  margin-top: 22px;
  padding: 20px 18px 22px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--ink-2);
}

.page-faq .faq-contact__list {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .faq-contact__list li {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 2px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

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

.page-faq .faq-contact__note {
  margin: 14px 0 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--muted);
}

@media (min-width: 620px) {
  .page-faq .faq-contact__list li {
    grid-template-columns: 106px minmax(0, 1fr);
    gap: 14px;
    align-items: baseline;
  }
}

@media (min-width: 760px) {
  .page-faq .faq-q > summary {
    padding: 17px 20px;
    font-size: 16px;
  }
  .page-faq .faq-q__body {
    padding: 0 20px 19px;
  }
  .page-faq .faq-contact {
    padding: 24px 22px 26px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-step,
  .page-faq .faq-q,
  .page-faq .faq-q__sign,
  .page-faq .faq-q__sign::before,
  .page-faq .faq-q__sign::after,
  .page-faq .faq-index__list a {
    transition: none;
  }
  .page-faq .faq-step:hover {
    transform: none;
  }
}