.page-faq {
  --faq-rule: 1px solid var(--line-soft);
  --faq-shadow: 0 18px 36px rgba(3, 8, 20, 0.42);
  position: relative;
  padding-bottom: clamp(48px, 7vw, 92px);
}

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

.page-faq .breadcrumbs {
  padding-top: 18px;
}

.page-faq a:focus-visible,
.page-faq summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: 6px;
}

/* ---------- Hero ---------- */

.page-faq .faq-hero {
  position: relative;
  isolation: isolate;
  padding: clamp(22px, 4vw, 42px) 0 clamp(28px, 4vw, 44px);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: -10% 0 -20% 0;
  z-index: -1;
  background-image:
    linear-gradient(to right, rgba(30, 58, 99, 0.55) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(30, 58, 99, 0.55) 1px, transparent 1px);
  background-size: 96px 96px;
  opacity: 0.34;
  -webkit-mask-image: radial-gradient(ellipse 70% 65% at 26% 30%, #000 0%, transparent 78%);
  mask-image: radial-gradient(ellipse 70% 65% at 26% 30%, #000 0%, transparent 78%);
  pointer-events: none;
}

.page-faq .faq-hero__inner {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
  align-items: end;
}

.page-faq .faq-hero__lead .eyebrow {
  margin: 0;
}

.page-faq .faq-hero__lead h1 {
  margin: 16px 0 0;
  font-size: clamp(38px, 9vw, 78px);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 0.98;
  color: var(--text);
}

.page-faq .faq-hero__lead .lead {
  margin: 22px 0 0;
  max-width: 36em;
  font-size: 16.5px;
  line-height: 1.8;
  color: var(--text-dim);
}

.page-faq .faq-hero__meta {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.page-faq .faq-hero__meta .status-strip {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--gold);
}

.page-faq .faq-hero__meta .status-strip__sep {
  color: var(--line);
}

.page-faq .faq-hero__note {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 场景卡 ---------- */

.page-faq .faq-scenes {
  padding: clamp(10px, 2vw, 20px) 0 clamp(38px, 6vw, 72px);
}

.page-faq .faq-scenes__grid {
  display: grid;
  gap: 16px;
  grid-template-columns: 1fr;
}

.page-faq .faq-scene {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-height: 168px;
  padding: 24px 18px 18px;
  background: var(--paper);
  color: var(--black);
  border: 2px solid var(--black);
  border-radius: 5px;
  box-shadow: var(--faq-shadow);
  text-decoration: none;
  transform: rotate(-0.5deg);
  transition: transform 0.32s var(--ease), box-shadow 0.32s var(--ease);
}

.page-faq .faq-scene:nth-child(even) {
  transform: rotate(0.6deg);
}

.page-faq .faq-scene::after {
  content: "";
  position: absolute;
  top: -2px;
  left: 18px;
  right: 18px;
  height: 3px;
  background: var(--cyan);
  border-radius: 0 0 2px 2px;
}

.page-faq .faq-scene:nth-child(4)::after {
  background: var(--gold);
}

.page-faq .faq-scene:hover,
.page-faq .faq-scene:focus-visible {
  transform: rotate(0deg) translateY(-5px);
  box-shadow: 0 26px 46px rgba(3, 8, 20, 0.55);
}

.page-faq .faq-scene__idx {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: rgba(11, 14, 20, 0.5);
}

.page-faq .faq-scene__title {
  font-size: 19px;
  font-weight: 800;
  letter-spacing: -0.01em;
  line-height: 1.25;
}

.page-faq .faq-scene__desc {
  font-size: 13.5px;
  line-height: 1.65;
  color: rgba(11, 14, 20, 0.72);
}

.page-faq .faq-scene__arrow {
  margin-top: auto;
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--black);
}

/* ---------- 问答组 ---------- */

.page-faq .faq-group {
  padding: clamp(34px, 5vw, 60px) 0;
  border-top: var(--faq-rule);
  scroll-margin-top: 118px;
}

.page-faq .faq-group__inner {
  display: grid;
  gap: clamp(22px, 4vw, 40px);
}

.page-faq .faq-group__aside {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.page-faq .faq-group__aside .eyebrow {
  margin: 0;
}

.page-faq .faq-group__title {
  margin: 0;
  font-size: clamp(23px, 4.4vw, 30px);
  font-weight: 800;
  letter-spacing: -0.015em;
  line-height: 1.15;
  color: var(--text);
}

.page-faq .faq-group__note {
  margin: 0;
  max-width: 30em;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--mist);
}

.page-faq .faq-group__main {
  display: flex;
  flex-direction: column;
  gap: clamp(20px, 3vw, 30px);
  min-width: 0;
}

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

.page-faq .faq-figure--square {
  max-width: 440px;
}

/* ---------- 问答折叠板 ---------- */

.page-faq .faq-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.page-faq .faq-item {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(16, 37, 68, 0.78), rgba(10, 23, 48, 0.62));
  overflow: hidden;
  transition: border-color 0.3s var(--ease);
}

.page-faq .faq-item[open] {
  border-color: rgba(44, 229, 214, 0.45);
}

.page-faq .faq-item__q {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px 16px 16px 18px;
  cursor: pointer;
  list-style: none;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.55;
  color: var(--text);
}

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

.page-faq .faq-item__idx {
  flex: 0 0 auto;
  padding-top: 3px;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--cyan);
}

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

.page-faq .faq-item__mark {
  flex: 0 0 auto;
  margin-left: auto;
  width: 24px;
  height: 24px;
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: 15px;
  line-height: 1;
  color: var(--cyan);
  border: 1px solid var(--line);
  border-radius: 7px;
  transition: transform 0.28s var(--ease), color 0.28s var(--ease), border-color 0.28s var(--ease);
}

.page-faq .faq-item[open] .faq-item__mark {
  transform: rotate(90deg);
  color: var(--gold);
  border-color: rgba(242, 181, 68, 0.6);
}

.page-faq .faq-item__a {
  position: relative;
  padding: 2px 18px 20px 26px;
  font-size: 15.5px;
  line-height: 1.82;
  color: var(--text-dim);
}

.page-faq .faq-item__a::before {
  content: "";
  position: absolute;
  top: 4px;
  bottom: 22px;
  left: 9px;
  width: 2px;
  border-radius: 2px;
  background: var(--cyan);
}

.page-faq .faq-item__a p {
  margin: 0 0 10px;
}

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

.page-faq .faq-key {
  display: inline-block;
  margin-right: 8px;
  padding: 1px 7px;
  border-radius: 4px;
  background: var(--gold);
  color: var(--black);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  vertical-align: 1px;
}

/* ---------- 收束 ---------- */

.page-faq .faq-closing {
  padding: clamp(30px, 5vw, 56px) 0 0;
}

.page-faq .faq-closing__note {
  margin: 0 0 clamp(20px, 3vw, 30px);
}

.page-faq .faq-closing__note p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
}

.page-faq .faq-closing__index {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding-top: 20px;
  border-top: var(--faq-rule);
}

.page-faq .faq-closing__label {
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-faq .faq-closing__list {
  display: grid;
  gap: 10px 26px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-closing__list a {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--text-dim);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.24s var(--ease), border-color 0.24s var(--ease);
}

.page-faq .faq-closing__list a::before {
  content: "—";
  font-family: var(--font-mono);
  color: var(--cyan);
}

.page-faq .faq-closing__list a:hover,
.page-faq .faq-closing__list a:focus-visible {
  color: var(--cyan-soft);
  border-bottom-color: rgba(44, 229, 214, 0.5);
}

/* ---------- 响应式 ---------- */

@media (min-width: 640px) {
  .page-faq .faq-scenes__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (min-width: 940px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
  }

  .page-faq .faq-hero__meta {
    padding-top: 0;
    padding-left: 24px;
    border-top: 0;
    border-left: 1px solid var(--line);
  }

  .page-faq .faq-group__inner {
    grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
    align-items: start;
  }

  .page-faq .faq-group__aside {
    position: sticky;
    top: 118px;
  }
}

@media (min-width: 1060px) {
  .page-faq .faq-scenes__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    align-items: start;
  }

  .page-faq .faq-scene:nth-child(2) {
    margin-top: 24px;
  }

  .page-faq .faq-scene:nth-child(3) {
    margin-top: 9px;
  }

  .page-faq .faq-scene:nth-child(4) {
    margin-top: 32px;
  }
}

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

  .page-faq .faq-scene,
  .page-faq .faq-scene:nth-child(even) {
    transform: none;
  }

  .page-faq .faq-scene:hover,
  .page-faq .faq-scene:focus-visible {
    transform: none;
  }
}