.page-faq {
  --faq-toc-w: 272px;
  --faq-anchor: #faq-update;
}

/* 首屏封面 */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(115% 145% at 4% 0%, rgba(57, 255, 136, .16), transparent 58%),
    radial-gradient(95% 125% at 97% 6%, rgba(255, 122, 26, .15), transparent 62%),
    var(--deck-navy);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(29, 78, 117, .34) 1px, transparent 1px),
    linear-gradient(90deg, rgba(29, 78, 117, .34) 1px, transparent 1px);
  background-size: 68px 68px;
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, .7), transparent 82%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, .7), transparent 82%);
  pointer-events: none;
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
  padding-top: clamp(24px, 4.5vw, 54px);
  padding-bottom: clamp(30px, 5vw, 62px);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3vw, 40px);
  align-items: center;
}

.page-faq .faq-hero__inner .breadcrumbs {
  margin-bottom: 16px;
}

.page-faq .faq-hero h1 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.85rem, 4.6vw, 3rem);
  line-height: 1.16;
  letter-spacing: -.02em;
  color: var(--ice);
}

.page-faq .faq-hero__lead {
  margin: 14px 0 0;
  max-width: 48ch;
  color: var(--steel);
  font-size: clamp(.98rem, 1.05vw, 1.06rem);
  line-height: 1.85;
}

.page-faq .faq-hero__actions {
  margin-top: 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-faq .faq-hero__figure {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--glass-blue);
  box-shadow: var(--shadow-deep);
}

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

@media (min-width: 920px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, .94fr);
  }
}

/* 双栏骨架 */
.page-faq .faq-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 3vw, 44px);
  padding-top: clamp(30px, 5vw, 62px);
  padding-bottom: clamp(40px, 6vw, 88px);
}

@media (min-width: 1000px) {
  .page-faq .faq-shell {
    grid-template-columns: var(--faq-toc-w) minmax(0, 1fr);
    align-items: start;
  }
}

/* 左侧问题目录 */
.page-faq .faq-toc {
  min-width: 0;
}

.page-faq .faq-toc__inner {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(22, 57, 92, .74);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  padding: 18px 16px;
}

@media (min-width: 1000px) {
  .page-faq .faq-toc {
    position: sticky;
    top: 104px;
  }
}

.page-faq .faq-toc__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .18em;
  color: var(--amber);
}

.page-faq .faq-toc__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 2px;
}

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

.page-faq .faq-toc__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 10px;
  border-left: 2px solid transparent;
  border-radius: var(--radius-sm);
  color: var(--ice);
  font-size: .93rem;
  line-height: 1.5;
  text-decoration: none;
  transition: background .2s var(--ease), color .2s var(--ease), border-color .2s var(--ease);
}

.page-faq .faq-toc__link:hover,
.page-faq .faq-toc__link:focus-visible {
  background: rgba(57, 255, 136, .1);
  border-left-color: var(--volt);
  color: var(--volt);
}

.page-faq .faq-toc__num {
  flex: none;
  font-family: var(--font-mono);
  font-size: .74rem;
  color: var(--arc);
}

.page-faq .faq-toc__note {
  margin: 14px 0 0;
  padding-top: 14px;
  border-top: 1px dashed var(--line);
  color: var(--steel);
  font-size: .85rem;
  line-height: 1.75;
}

.page-faq .faq-toc__note a {
  color: var(--volt);
  text-underline-offset: 3px;
}

/* 右侧问答主体 */
.page-faq .faq-body {
  min-width: 0;
}

.page-faq .faq-section {
  scroll-margin-top: 112px;
}

.page-faq .faq-section + .faq-section {
  margin-top: clamp(34px, 5vw, 66px);
}

.page-faq .faq-section__head {
  display: grid;
  grid-template-columns: 2.8rem minmax(0, 1fr);
  column-gap: 12px;
  align-items: start;
  padding-bottom: 14px;
  margin-bottom: 20px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-section__head .section-num {
  font-family: var(--font-mono);
  font-size: 1.45rem;
  font-weight: 700;
  line-height: 1.25;
  color: var(--arc);
}

.page-faq .faq-section__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.2rem, 2.2vw, 1.62rem);
  line-height: 1.35;
  letter-spacing: -.01em;
  color: var(--ice);
}

.page-faq .faq-section__lead {
  grid-column: 2;
  margin: 8px 0 0;
  color: var(--steel);
  font-size: .94rem;
  line-height: 1.8;
}

.page-faq .faq-figure {
  margin: 0 0 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--panel-blue);
}

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

.page-faq .faq-figure figcaption {
  padding: 10px 16px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: .78rem;
  line-height: 1.7;
  color: var(--steel);
}

/* 折叠问答卡 */
.page-faq .faq-item {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel-blue);
  overflow: hidden;
  transition: border-color .25s var(--ease), box-shadow .25s var(--ease);
}

.page-faq .faq-item + .faq-item {
  margin-top: 12px;
}

.page-faq .faq-item[open] {
  border-color: rgba(57, 255, 136, .5);
  box-shadow: 0 18px 44px -34px rgba(0, 0, 0, .95);
}

.page-faq .faq-item[open]::before {
  content: "";
  display: block;
  height: 2px;
  background: linear-gradient(90deg, var(--volt), var(--arc));
}

.page-faq .faq-item__q {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 15px 18px;
  cursor: pointer;
  list-style: none;
  color: var(--ice);
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.65;
}

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

.page-faq .faq-item__q:focus-visible {
  outline: 2px solid var(--volt);
  outline-offset: -3px;
}

.page-faq .faq-item__q::after {
  content: "+";
  flex: none;
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 1.05rem;
  line-height: 1.5;
  color: var(--volt);
}

.page-faq .faq-item[open] .faq-item__q::after {
  content: "−";
  color: var(--arc);
}

.page-faq .faq-item__n {
  flex: none;
  padding-top: .28em;
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .06em;
  color: var(--steel);
}

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

.page-faq .faq-item__a {
  padding: 0 18px 18px;
  border-top: 1px solid var(--line);
}

.page-faq .faq-item__a p {
  margin: 14px 0 0;
  color: var(--steel);
  font-size: .96rem;
  line-height: 1.85;
}

.page-faq .faq-item__a a {
  color: var(--volt);
  text-underline-offset: 3px;
}

.page-faq .k {
  font-family: var(--font-mono);
  font-style: normal;
  font-weight: 700;
  color: var(--leaf);
}

/* 联系引导条 */
.page-faq .faq-cta {
  margin-top: 20px;
  padding: 18px 20px;
  border: 1px solid rgba(255, 122, 26, .45);
  border-radius: var(--radius);
  background: linear-gradient(100deg, rgba(255, 122, 26, .12), rgba(15, 41, 66, .9));
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px 20px;
}

.page-faq .faq-cta__text {
  flex: 1 1 22rem;
  margin: 0;
  color: var(--ice);
  font-size: .95rem;
  line-height: 1.75;
}

@media (max-width: 560px) {
  .page-faq .faq-section__head {
    grid-template-columns: minmax(0, 1fr);
    row-gap: 6px;
  }

  .page-faq .faq-section__head .section-num,
  .page-faq .faq-section__lead {
    grid-column: 1;
  }

  .page-faq .faq-item__q {
    padding: 14px;
    gap: 10px;
    font-size: .96rem;
  }

  .page-faq .faq-item__a {
    padding: 0 14px 16px;
  }

  .page-faq .faq-cta {
    padding: 16px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item,
  .page-faq .faq-toc__link {
    transition: none;
  }
}