.page-faq {
  --faq-rail: 296px;
  --faq-rail-top: 96px;
  position: relative;
  background:
    radial-gradient(760px 360px at 8% 0%, rgba(76, 255, 143, .09), transparent 60%),
    radial-gradient(620px 320px at 92% 4%, rgba(90, 169, 255, .08), transparent 62%),
    var(--ink);
  color: var(--text);
}

/* 首屏 */
.page-faq .faq-hero {
  padding: clamp(26px, 5vw, 62px) 0 clamp(20px, 3vw, 38px);
  border-bottom: var(--hair);
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: clamp(22px, 3vw, 42px);
  margin-top: 18px;
}

.page-faq .faq-hero__lead h1 {
  margin: 12px 0 0;
  font-family: var(--serif);
  font-weight: 700;
  font-size: clamp(30px, 5.2vw, 54px);
  line-height: 1.12;
  letter-spacing: -.01em;
  color: var(--white);
}

.page-faq .faq-hero__lead .lede {
  margin: 16px 0 0;
  max-width: 60ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--text);
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.page-faq .faq-hero__panel {
  border: var(--hair);
  border-radius: var(--radius);
  background: linear-gradient(160deg, rgba(22, 32, 42, .92), rgba(16, 22, 29, .58));
  box-shadow: var(--shadow);
  padding: clamp(16px, 2.4vw, 22px);
}

.page-faq .faq-hero__panel-title {
  margin: 0 0 14px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--neon);
}

.page-faq .faq-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px 14px;
}

.page-faq .faq-stat {
  display: grid;
  gap: 4px;
  min-width: 0;
  padding-top: 10px;
  border-top: 1px solid var(--line);
}

.page-faq .faq-stat__num {
  font-family: var(--mono);
  font-size: clamp(19px, 2vw, 24px);
  font-weight: 600;
  letter-spacing: -.02em;
  color: var(--white);
  line-height: 1.1;
  white-space: nowrap;
}

.page-faq .faq-stat:nth-child(2) .faq-stat__num {
  color: var(--neon);
}

.page-faq .faq-stat__label {
  font-size: 12px;
  line-height: 1.6;
  color: var(--text);
  opacity: .82;
}

/* 场景导航横条 */
.page-faq .faq-nav {
  border-bottom: var(--hair);
  background: linear-gradient(180deg, rgba(16, 22, 42, .06), rgba(16, 22, 29, .58));
}

.page-faq .faq-nav__inner {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-top: 10px;
  padding-bottom: 10px;
}

.page-faq .faq-nav__label {
  flex: 0 0 auto;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--text);
  opacity: .7;
}

.page-faq .faq-nav__list {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 2px 0;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

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

.page-faq .faq-nav__link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 6px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  white-space: nowrap;
  font-family: var(--sans);
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: .02em;
  color: var(--text);
  text-decoration: none;
  transition: color .16s var(--ease), border-color .16s var(--ease), background-color .16s var(--ease);
}

.page-faq .faq-nav__link:hover,
.page-faq .faq-nav__link:focus-visible {
  color: var(--white);
  border-color: var(--neon-deep);
  background: rgba(76, 255, 143, .07);
}

.page-faq .faq-nav__link.is-current {
  color: var(--neon);
  border-color: rgba(76, 255, 143, .5);
  background: rgba(76, 255, 143, .1);
}

.page-faq .faq-nav__num {
  font-family: var(--mono);
  font-size: 10px;
  color: inherit;
  opacity: .6;
}

/* 主体两栏 */
.page-faq .faq-body {
  display: grid;
  gap: clamp(28px, 4vw, 52px);
  padding-top: clamp(26px, 4vw, 52px);
  padding-bottom: clamp(28px, 4vw, 56px);
}

.page-faq .faq-stream {
  display: grid;
  gap: clamp(36px, 5vw, 68px);
  min-width: 0;
}

.page-faq .faq-group {
  scroll-margin-top: 24px;
  min-width: 0;
}

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: baseline;
  gap: 10px 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-group__index {
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--neon);
}

.page-faq .faq-group__head h2 {
  margin: 0;
  font-family: var(--serif);
  font-weight: 700;
  font-size: clamp(21px, 2.6vw, 30px);
  line-height: 1.25;
  color: var(--white);
}

.page-faq .faq-group__count {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .04em;
  color: var(--text);
  opacity: .7;
  white-space: nowrap;
}

.page-faq .faq-group__intro {
  margin: 14px 0 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--text);
}

.page-faq .faq-figure {
  margin: 18px 0 0;
  border: var(--hair);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-faq .faq-figure--side {
  margin-top: 0;
}

/* 折叠问答 */
.page-faq .faq-list {
  display: grid;
  gap: 10px;
  margin-top: 18px;
  min-width: 0;
}

.page-faq .faq-item {
  border: var(--hair);
  border-left: 2px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(16, 22, 29, .92), rgba(16, 22, 29, .6));
  transition: border-color .16s var(--ease), background-color .16s var(--ease);
}

.page-faq .faq-item:hover,
.page-faq .faq-item:focus-within {
  border-color: rgba(76, 255, 143, .38);
}

.page-faq .faq-item[open] {
  border-left-color: var(--neon);
  background: linear-gradient(180deg, rgba(22, 32, 42, .95), rgba(16, 22, 29, .68));
}

.page-faq .faq-q {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 16px;
  cursor: pointer;
  list-style: none;
  font-family: var(--sans);
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--white);
}

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

.page-faq .faq-q::before {
  content: "+";
  flex: 0 0 auto;
  font-family: var(--mono);
  font-size: 17px;
  line-height: 1.35;
  color: var(--neon);
  transition: transform .16s var(--ease);
}

.page-faq .faq-item[open] .faq-q::before {
  content: "–";
}

.page-faq .faq-q:focus-visible {
  outline: 1px solid var(--neon);
  outline-offset: -2px;
}

.page-faq .faq-a {
  padding: 0 16px 16px clamp(30px, 6vw, 44px);
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--text);
  animation: faq-reveal .24s var(--ease) both;
}

.page-faq .faq-a p {
  margin: 0 0 8px;
}

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

@keyframes faq-reveal {
  from {
    opacity: 0;
    transform: translateY(5px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* 图配问答 */
.page-faq .faq-split {
  display: grid;
  gap: 18px;
  margin-top: 18px;
}

.page-faq .faq-split .faq-list {
  margin-top: 0;
}

/* 侧栏 */
.page-faq .faq-rail {
  display: grid;
  gap: 14px;
  align-content: start;
  min-width: 0;
}

.page-faq .rail-card {
  border: var(--hair);
  border-radius: var(--radius);
  background: linear-gradient(170deg, rgba(22, 32, 42, .8), rgba(16, 22, 29, .5));
  box-shadow: var(--shadow);
  padding: 16px;
}

.page-faq .rail-card--steps {
  border-left: 2px solid var(--neon-deep);
}

.page-faq .rail-card--note {
  background: linear-gradient(170deg, rgba(76, 255, 143, .08), rgba(16, 22, 29, .62));
  border-color: rgba(76, 255, 143, .22);
}

.page-faq .rail-card__title {
  margin: 0 0 12px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--neon);
}

.page-faq .rail-list {
  display: grid;
  gap: 2px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .rail-link {
  display: block;
  padding: 8px 0;
  border-bottom: 1px dashed rgba(42, 53, 65, .8);
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--blue);
  text-decoration: none;
  transition: color .16s var(--ease), padding-left .16s var(--ease);
}

.page-faq .rail-list li:last-child .rail-link {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-faq .rail-link:hover,
.page-faq .rail-link:focus-visible {
  color: var(--neon);
  padding-left: 4px;
}

.page-faq .rail-steps {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0 0 0 2px;
  list-style: none;
  counter-reset: faq-step;
}

.page-faq .rail-step {
  position: relative;
  padding-left: 30px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--text);
  counter-increment: faq-step;
}

.page-faq .rail-step::before {
  content: counter(faq-step);
  position: absolute;
  left: 0;
  top: 1px;
  width: 19px;
  height: 19px;
  border: 1px solid var(--neon-deep);
  border-radius: 50%;
  font-family: var(--mono);
  font-size: 10px;
  line-height: 17px;
  text-align: center;
  color: var(--neon);
}

.page-faq .rail-step::after {
  content: "";
  position: absolute;
  left: 9px;
  top: 21px;
  bottom: -12px;
  width: 1px;
  background: var(--line);
}

.page-faq .rail-step:last-child::after {
  display: none;
}

.page-faq .rail-note {
  margin: 0 0 14px;
  font-size: 13px;
  line-height: 1.75;
  color: var(--text);
}

.page-faq .rail-cta {
  display: inline-flex;
  width: 100%;
  justify-content: center;
}

/* 收束条 */
.page-faq .faq-cta-wrap {
  padding-bottom: clamp(36px, 6vw, 76px);
}

.page-faq .faq-cta {
  display: grid;
  gap: 18px;
  padding: clamp(20px, 3vw, 32px);
  border: var(--hair);
  border-radius: var(--radius);
  background: linear-gradient(120deg, rgba(76, 255, 143, .1), rgba(16, 22, 29, .92) 58%);
  box-shadow: var(--shadow);
}

.page-faq .faq-cta__text h2 {
  margin: 0;
  font-family: var(--serif);
  font-weight: 700;
  font-size: clamp(20px, 2.6vw, 28px);
  line-height: 1.3;
  color: var(--white);
}

.page-faq .faq-cta__text p {
  margin: 10px 0 0;
  max-width: 54ch;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--text);
}

.page-faq .faq-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* 平板与桌面 */
@media (min-width: 720px) {
  .page-faq .faq-split {
    grid-template-columns: minmax(0, 1fr) minmax(0, .58fr);
    align-items: start;
  }

  .page-faq .faq-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 24px;
  }

  .page-faq .faq-cta__actions {
    justify-content: flex-end;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1fr) 330px;
    align-items: end;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-body {
    grid-template-columns: minmax(0, 1fr) var(--faq-rail);
    align-items: start;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: var(--faq-rail-top);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-a {
    animation: none;
  }

  .page-faq .faq-q::before,
  .page-faq .faq-item,
  .page-faq .rail-link {
    transition: none;
  }
}