.page-faq {
  --faq-line: rgba(143, 163, 184, .18);
  --faq-block: clamp(40px, 6vw, 84px);
  --faq-gap: clamp(20px, 4vw, 48px);
  background: var(--navy-900);
  color: var(--mist);
  padding-bottom: var(--faq-block);
  overflow-x: hidden;
}

.page-faq .faq-crumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 20px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
}

.page-faq .faq-crumb .s3-crumb {
  color: var(--steel);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.page-faq .faq-crumb .s3-crumb:hover,
.page-faq .faq-crumb .s3-crumb:focus-visible {
  color: var(--cyan-400);
  border-bottom-color: var(--line-cyan);
}

.page-faq .faq-crumb .s3-crumb[aria-current="page"] {
  color: var(--mist);
}

/* 首屏 */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(24px, 4vw, 56px) 0 clamp(48px, 7vw, 84px);
  overflow: hidden;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: -20% -10% 20% -10%;
  background:
    radial-gradient(60% 55% at 78% 30%, rgba(36, 224, 214, .16), transparent 70%),
    radial-gradient(45% 45% at 18% 12%, rgba(255, 107, 26, .13), transparent 72%);
  pointer-events: none;
  z-index: 0;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: -8%;
  right: -8%;
  bottom: -46px;
  height: 110px;
  background: var(--navy-700);
  transform: skewY(-3deg);
  z-index: 0;
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(24px, 4vw, 44px);
  align-items: end;
}

.page-faq .faq-hero__title {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(34px, 7vw, 68px);
  line-height: 1.04;
  letter-spacing: -.02em;
}

.page-faq .faq-hero__accent {
  color: var(--orange-500);
  display: inline-block;
  transform: skewX(-2deg);
}

.page-faq .faq-hero__lead {
  margin: 20px 0 0;
  max-width: 46ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.78;
  color: rgba(245, 248, 251, .82);
}

.page-faq .faq-hero__meta {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
  border-top: 1px solid var(--faq-line);
  padding-top: 18px;
}

.page-faq .faq-hero__meta li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12.5px;
}

.page-faq .faq-hero__meta-k {
  color: var(--steel);
  letter-spacing: .08em;
  min-width: 68px;
}

.page-faq .faq-hero__meta-v {
  color: var(--mist);
}

.page-faq .faq-hero__media {
  margin: 0;
  border: 1px solid var(--line-cyan);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--navy-700);
}

.page-faq .faq-hero__media .s3-media__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-faq .faq-hero__media .s3-media__cap {
  display: block;
  padding: 10px 14px 12px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--steel);
  border-top: 1px solid var(--faq-line);
}

/* 高频四问 */
.page-faq .faq-hot {
  position: relative;
  z-index: 1;
  padding: clamp(28px, 4vw, 48px) 0 clamp(32px, 5vw, 64px);
}

.page-faq .faq-hot__title {
  margin: 0 0 18px;
  font-family: var(--font-mono);
  font-weight: 400;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--cyan-400);
  text-transform: uppercase;
}

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

.page-faq .faq-hot__link {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 18px;
  border: 1px solid var(--faq-line);
  border-radius: var(--radius-sm);
  background: var(--glass);
  color: var(--mist);
  text-decoration: none;
  transition: transform .22s var(--ease), border-color .22s var(--ease), background .22s var(--ease);
}

.page-faq .faq-hot__link:hover,
.page-faq .faq-hot__link:focus-visible {
  transform: translateY(-3px);
  border-color: var(--line-cyan);
  background: var(--glass-strong);
}

.page-faq .faq-hot__link:focus-visible {
  outline: 2px solid var(--cyan-400);
  outline-offset: 3px;
}

.page-faq .faq-hot__num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--orange-500);
  letter-spacing: .06em;
}

.page-faq .faq-hot__q {
  flex: 1 1 auto;
  font-size: 15px;
  line-height: 1.5;
}

.page-faq .faq-hot__go {
  color: var(--cyan-400);
  font-family: var(--font-mono);
  font-size: 15px;
}

/* 主体：索引 + 手风琴 */
.page-faq .faq-layout {
  display: grid;
  gap: var(--faq-gap);
  align-items: start;
}

.page-faq .faq-index {
  border: 1px solid var(--faq-line);
  border-radius: var(--radius);
  background: var(--navy-700);
  padding: 18px 18px 16px;
}

.page-faq .faq-index__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .16em;
  color: var(--steel);
}

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

.page-faq .faq-index__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 8px;
  border-radius: var(--radius-sm);
  color: rgba(245, 248, 251, .86);
  text-decoration: none;
  font-size: 14px;
  line-height: 1.5;
  border-left: 2px solid transparent;
  transition: background .2s var(--ease), border-color .2s var(--ease), color .2s var(--ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  background: var(--navy-500);
  border-left-color: var(--orange-500);
  color: var(--mist);
}

.page-faq .faq-index__link:focus-visible {
  outline: 2px solid var(--cyan-400);
  outline-offset: 2px;
}

.page-faq .faq-index__num {
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--cyan-400);
}

.page-faq .faq-index__foot {
  margin: 14px 0 0;
  padding-top: 12px;
  border-top: 1px solid var(--faq-line);
  font-size: 12px;
  line-height: 1.65;
  color: var(--steel);
}

.page-faq .faq-body {
  display: grid;
  gap: clamp(28px, 5vw, 56px);
  min-width: 0;
}

.page-faq .faq-group {
  min-width: 0;
  scroll-margin-top: calc(var(--nav-h) + 20px);
}

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: baseline;
  gap: 6px 14px;
  padding-bottom: 14px;
  border-bottom: 2px solid var(--line);
}

.page-faq .faq-group__num {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--orange-500);
  letter-spacing: .08em;
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(22px, 2.8vw, 30px);
  line-height: 1.2;
  letter-spacing: -.01em;
}

.page-faq .faq-group__desc {
  grid-column: 2 / -1;
  margin: 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--steel);
}

.page-faq .faq-list {
  margin-top: 4px;
  display: grid;
  gap: 0;
}

.page-faq .faq-item {
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .faq-item__summary {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 18px 4px;
  cursor: pointer;
  list-style: none;
  border-radius: var(--radius-sm);
  transition: background .22s var(--ease);
}

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

.page-faq .faq-item__summary:hover {
  background: rgba(18, 63, 102, .45);
}

.page-faq .faq-item__summary:focus-visible {
  outline: 2px solid var(--cyan-400);
  outline-offset: 2px;
}

.page-faq .faq-item__num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--steel);
  padding-top: 3px;
  flex: 0 0 auto;
}

.page-faq .faq-item__q {
  flex: 1 1 auto;
  font-size: clamp(15px, 1.7vw, 17px);
  font-weight: 500;
  line-height: 1.55;
  color: var(--mist);
}

.page-faq .faq-item__icon {
  position: relative;
  flex: 0 0 auto;
  width: 20px;
  height: 20px;
  margin-top: 2px;
  border: 1px solid var(--line-cyan);
  border-radius: 4px;
}

.page-faq .faq-item__icon::before,
.page-faq .faq-item__icon::after {
  content: "";
  position: absolute;
  background: var(--cyan-400);
  transition: transform .22s var(--ease), opacity .22s var(--ease);
}

.page-faq .faq-item__icon::before {
  top: 50%;
  left: 4px;
  right: 4px;
  height: 1.5px;
  transform: translateY(-50%);
}

.page-faq .faq-item__icon::after {
  left: 50%;
  top: 4px;
  bottom: 4px;
  width: 1.5px;
  transform: translateX(-50%);
}

.page-faq .faq-item[open] .faq-item__icon::after {
  transform: translateX(-50%) scaleY(0);
  opacity: 0;
}

.page-faq .faq-item[open] .faq-item__summary {
  background: rgba(18, 63, 102, .55);
}

.page-faq .faq-item[open] .faq-item__num {
  color: var(--orange-500);
}

.page-faq .faq-item__body {
  padding: 4px 4px 22px 34px;
  border-left: 2px solid var(--cyan-400);
  margin-left: 6px;
  background: linear-gradient(90deg, rgba(11, 42, 71, .9), rgba(11, 42, 71, .35));
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.page-faq .faq-item__body p {
  margin: 0 0 10px;
  max-width: 62ch;
  font-size: 14.5px;
  line-height: 1.78;
  color: rgba(245, 248, 251, .84);
}

.page-faq .faq-item__body p:last-of-type {
  margin-bottom: 0;
}

.page-faq .faq-item__link {
  display: inline-block;
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .04em;
  color: var(--cyan-400);
  text-decoration: none;
  border-bottom: 1px solid var(--line-cyan);
  padding-bottom: 2px;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.page-faq .faq-item__link:hover,
.page-faq .faq-item__link:focus-visible {
  color: var(--orange-300);
  border-bottom-color: var(--orange-300);
}

.page-faq .faq-item__link:focus-visible {
  outline: 2px solid var(--cyan-400);
  outline-offset: 3px;
}

.page-faq .faq-figure {
  margin: clamp(20px, 3vw, 28px) 0 0;
  border: 1px solid var(--line-cyan);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--navy-700);
}

.page-faq .faq-figure .s3-media__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-faq .faq-figure .s3-media__cap {
  display: block;
  padding: 10px 14px 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--steel);
  border-top: 1px solid var(--faq-line);
}

/* 收尾 */
.page-faq .faq-cta {
  margin-top: clamp(40px, 6vw, 88px);
  padding: clamp(34px, 5vw, 64px) 0;
  background:
    linear-gradient(115deg, rgba(255, 107, 26, .14), transparent 46%),
    var(--navy-700);
  border-top: 1px solid var(--line-cyan);
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .faq-cta__inner {
  display: grid;
  gap: 22px;
  align-items: center;
}

.page-faq .faq-cta__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(24px, 3.4vw, 38px);
  line-height: 1.2;
  letter-spacing: -.01em;
}

.page-faq .faq-cta__lead {
  margin: 12px 0 0;
  max-width: 56ch;
  font-size: 14.5px;
  line-height: 1.78;
  color: rgba(245, 248, 251, .82);
}

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

@media (min-width: 640px) {
  .page-faq .faq-hero__meta {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
  }

  .page-faq .faq-hero__meta li {
    flex-direction: column;
    gap: 4px;
  }

  .page-faq .faq-hot__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

  .page-faq .faq-hot__list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq .faq-hot__link {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
    min-height: 112px;
  }

  .page-faq .faq-hot__q {
    font-size: 14px;
  }

  .page-faq .faq-layout {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    gap: clamp(28px, 3.5vw, 56px);
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--nav-h) + 18px);
  }

  .page-faq .faq-cta__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    justify-content: space-between;
  }

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

  .page-faq .faq-item__body {
    padding-left: 42px;
  }
}

@media (min-width: 1200px) {
  .page-faq .faq-hero__text {
    padding-bottom: 12px;
  }

  .page-faq .faq-hero__media {
    transform: rotate(-1.2deg);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-hot__link,
  .page-faq .faq-hero__media,
  .page-faq .faq-item__icon::before,
  .page-faq .faq-item__icon::after {
    transition: none;
    transform: none;
  }

  .page-faq .faq-hot__link:hover {
    transform: none;
  }
}