.page-faq {
  --faq-index-w: 264px;
  --faq-gap: clamp(24px, 3.4vw, 48px);
  display: block;
  background: var(--snow);
  color: var(--ink);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(120% 90% at 10% 0%, rgba(46, 107, 255, .34), transparent 62%),
    radial-gradient(90% 80% at 94% 10%, rgba(255, 90, 54, .2), transparent 64%),
    var(--night);
  color: var(--snow);
  padding: calc(var(--header-h) + clamp(28px, 6vw, 64px)) 0 clamp(48px, 7vw, 84px);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 3px;
  background: linear-gradient(90deg,
    var(--flag-blue) 0 20%,
    var(--white) 20% 40%,
    var(--flag-red) 40% 60%,
    var(--flag-green) 60% 80%,
    var(--flag-yellow) 80% 100%);
  opacity: .92;
  pointer-events: none;
}

.page-faq .faq-crumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: .82rem;
  color: rgba(247, 250, 255, .66);
  margin-bottom: clamp(24px, 4vw, 44px);
}

.page-faq .faq-crumb a {
  color: var(--ice);
  text-decoration: none;
  border-bottom: 1px solid rgba(77, 163, 255, .4);
}

.page-faq .faq-crumb a:hover,
.page-faq .faq-crumb a:focus-visible {
  border-bottom-color: var(--ice);
}

.page-faq .faq-hero__inner {
  display: grid;
  gap: clamp(30px, 4.5vw, 56px);
  align-items: center;
}

.page-faq .faq-hero .eyebrow {
  margin: 0;
  font-size: .74rem;
  font-weight: 700;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--flag-yellow);
}

.page-faq .faq-hero h1 {
  margin: 14px 0 0;
  font-size: clamp(30px, 5.2vw, 56px);
  line-height: 1.14;
  font-weight: 900;
  letter-spacing: -.01em;
  max-width: 20ch;
}

.page-faq .faq-hero__lead {
  margin: 20px 0 0;
  max-width: 56ch;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.85;
  color: rgba(247, 250, 255, .82);
}

.page-faq .faq-hero__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 22px;
}

.page-faq .faq-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 22px;
  margin-top: 30px;
  padding-top: 24px;
  border-top: 1px solid var(--line-dark);
}

.page-faq .faq-stat__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(19px, 2.4vw, 26px);
  font-weight: 700;
  line-height: 1.1;
  color: var(--orange);
}

.page-faq .faq-stat__label {
  display: block;
  margin-top: 6px;
  font-size: .8rem;
  line-height: 1.5;
  color: rgba(247, 250, 255, .66);
}

.page-faq .faq-hero__media {
  margin: 0;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line-dark);
  box-shadow: var(--shadow-2);
  background: rgba(247, 250, 255, .06);
}

.page-faq .faq-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
}

/* ---------- 问答主体 ---------- */
.page-faq .faq-board {
  padding: clamp(40px, 6vw, 80px) 0 clamp(56px, 8vw, 104px);
  background: var(--snow);
}

.page-faq .faq-board__title {
  margin: 0 0 clamp(24px, 3.4vw, 40px);
  font-size: clamp(19px, 2.2vw, 24px);
  font-weight: 800;
  letter-spacing: .02em;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-layout {
  display: grid;
  gap: var(--faq-gap);
  align-items: start;
}

/* 索引 */
.page-faq .faq-index {
  padding: 20px 18px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.page-faq .faq-index .label {
  margin: 0;
  color: var(--ink-soft);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-faq .faq-index__list a {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  border-left: 2px solid transparent;
  color: var(--ink-soft);
  font-size: .93rem;
  line-height: 1.5;
  text-decoration: none;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .faq-index__list a:hover,
.page-faq .faq-index__list a:focus-visible {
  background: rgba(77, 163, 255, .1);
  border-left-color: var(--ice);
  color: var(--ink);
}

.page-faq .faq-index__list .stat-mono {
  flex: 0 0 auto;
  font-size: .76rem;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--flag-blue);
}

.page-faq .faq-index__help {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px dashed var(--line);
  font-size: .86rem;
  line-height: 1.78;
  color: var(--ink-soft);
}

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

.page-faq .faq-index__help a {
  color: var(--flag-blue);
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px solid rgba(46, 107, 255, .3);
}

/* 分组 */
.page-faq .faq-answers {
  min-width: 0;
}

.page-faq .faq-group {
  scroll-margin-top: calc(var(--header-h) + 24px);
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(34px, 5vw, 58px);
}

.page-faq .faq-group__head {
  padding-bottom: 14px;
  border-bottom: 2px solid var(--night);
}

.page-faq .faq-group__num {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: .76rem;
  font-weight: 700;
  letter-spacing: .16em;
  color: var(--orange);
  background: rgba(255, 90, 54, .1);
  padding: 4px 10px;
  border-radius: 999px;
}

.page-faq .faq-group__head h2 {
  margin: 12px 0 0;
  font-size: clamp(21px, 2.6vw, 30px);
  font-weight: 800;
  line-height: 1.28;
}

.page-faq .faq-group__desc {
  margin: 10px 0 0;
  max-width: 60ch;
  font-size: .95rem;
  line-height: 1.8;
  color: var(--ink-soft);
}

.page-faq .faq-shot {
  margin: 20px 0 18px;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--night-2);
}

.page-faq .faq-shot img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 5 / 3;
  object-fit: cover;
}

/* 手风琴 */
.page-faq .qa-list {
  margin-top: 18px;
  display: grid;
  gap: 10px;
}

.page-faq .qa {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-faq .qa[open] {
  border-color: rgba(77, 163, 255, .55);
  box-shadow: var(--shadow-1);
}

.page-faq .qa summary {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.55;
  color: var(--ink);
}

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

.page-faq .qa summary:focus-visible {
  outline: 2px solid var(--ice);
  outline-offset: -2px;
}

.page-faq .qa__q {
  flex: 1 1 auto;
  min-width: 0;
}

.page-faq .qa__icon {
  position: relative;
  flex: 0 0 auto;
  width: 22px;
  height: 22px;
  margin-top: 2px;
  border-radius: 50%;
  background: rgba(77, 163, 255, .16);
  transition: background var(--dur) var(--ease);
}

.page-faq .qa__icon::before,
.page-faq .qa__icon::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--ice);
  border-radius: 2px;
  transform: translate(-50%, -50%);
}

.page-faq .qa__icon::before {
  width: 10px;
  height: 2px;
}

.page-faq .qa__icon::after {
  width: 2px;
  height: 10px;
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}

.page-faq .qa[open] .qa__icon {
  background: var(--orange);
}

.page-faq .qa[open] .qa__icon::before {
  background: var(--white);
}

.page-faq .qa[open] .qa__icon::after {
  background: var(--white);
  transform: translate(-50%, -50%) scaleY(0);
  opacity: 0;
}

.page-faq .qa__body {
  padding: 0 18px 18px;
  font-size: .95rem;
  line-height: 1.85;
  color: var(--ink-soft);
}

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

.page-faq .qa__body p + p,
.page-faq .qa__body ol + p {
  margin-top: 10px;
}

.page-faq .qa[open] .qa__body {
  animation: faq-reveal .28s var(--ease) both;
}

@keyframes faq-reveal {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.page-faq .qa-steps {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-faq .qa-steps li {
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr);
  gap: 10px;
  align-items: start;
  font-size: .94rem;
  line-height: 1.75;
}

.page-faq .qa-steps .step-num {
  font-family: var(--font-mono);
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .04em;
  text-align: center;
  padding: 3px 0;
  border-radius: 6px;
  color: var(--night);
  background: rgba(77, 163, 255, .18);
}

/* ---------- 结尾行动带 ---------- */
.page-faq .faq-cta {
  position: relative;
  overflow: hidden;
  background: var(--night);
  color: var(--snow);
  padding: clamp(40px, 6vw, 72px) 0;
}

.page-faq .faq-cta::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(80% 130% at 88% 16%, rgba(46, 107, 255, .32), transparent 64%);
  pointer-events: none;
}

.page-faq .faq-cta__inner {
  position: relative;
  display: grid;
  gap: 24px;
  align-items: center;
}

.page-faq .faq-cta h2 {
  margin: 0;
  font-size: clamp(22px, 3vw, 32px);
  font-weight: 900;
  line-height: 1.25;
}

.page-faq .faq-cta p {
  margin: 10px 0 0;
  max-width: 60ch;
  font-size: .95rem;
  line-height: 1.85;
  color: rgba(247, 250, 255, .8);
}

.page-faq .faq-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-index-w) minmax(0, 1fr);
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--header-h) + 20px);
  }
}

@media (min-width: 860px) {
  .page-faq .faq-cta__inner {
    grid-template-columns: minmax(0, 1fr) auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq *,
  .page-faq *::before,
  .page-faq *::after {
    animation: none !important;
    transition: none !important;
  }
}