.page-faq {
  --faq-cut: 18px;
  color: var(--ink);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: 28px 0 64px;
  background: linear-gradient(180deg, var(--frost) 0%, var(--snow) 72%);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  z-index: -1;
  top: -180px;
  right: -160px;
  width: min(620px, 78vw);
  height: min(620px, 78vw);
  border-radius: 50%;
  background: radial-gradient(circle at 35% 35%, rgba(95, 198, 232, 0.5), rgba(95, 198, 232, 0) 68%);
  pointer-events: none;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  z-index: -1;
  top: 0;
  right: 0;
  width: min(380px, 46vw);
  height: 100%;
  background: linear-gradient(200deg, rgba(255, 122, 52, 0.18) 0%, rgba(255, 122, 52, 0) 64%);
  clip-path: polygon(36% 0, 100% 0, 100% 100%, 0 100%);
  pointer-events: none;
}

.page-faq .faq-hero .breadcrumb {
  margin-bottom: 30px;
}

.page-faq .faq-hero-grid {
  display: grid;
  gap: 32px;
}

.page-faq .faq-hero h1 {
  margin: 10px 0 18px;
  font-size: clamp(36px, 6.2vw, 78px);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--pine);
  transform: skewX(-5deg);
  transform-origin: left bottom;
}

.page-faq .faq-hero .eyebrow {
  color: var(--clay);
}

.page-faq .faq-hero .lead {
  max-width: 48ch;
  margin: 0;
  font-size: clamp(16px, 1.35vw, 19px);
  line-height: 1.78;
  color: var(--ink);
}

.page-faq .faq-hero-card {
  position: relative;
  padding: 22px 22px 16px;
  background: var(--white);
  border: 1px solid var(--line);
  clip-path: polygon(0 0, calc(100% - var(--faq-cut)) 0, 100% var(--faq-cut), 100% 100%, 0 100%);
  box-shadow: 0 22px 44px -30px rgba(15, 46, 51, 0.6);
}

.page-faq .faq-hero-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 88px;
  height: 3px;
  background: linear-gradient(90deg, var(--ember), var(--gold));
}

.page-faq .faq-hero-card .card-eyebrow {
  color: var(--stone);
}

.page-faq .faq-quick {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
}

.page-faq .faq-quick li + li {
  border-top: 1px solid var(--frost);
}

.page-faq .faq-quick a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 13px 0;
  color: var(--ink);
  font-size: 15px;
  line-height: 1.5;
  text-decoration: none;
  transition: color 0.2s var(--ease);
}

.page-faq .faq-quick a::before {
  content: "";
  flex: none;
  width: 7px;
  height: 7px;
  background: var(--ice);
  clip-path: polygon(0 0, 100% 50%, 0 100%);
  transition: background-color 0.2s var(--ease);
}

.page-faq .faq-quick a:hover,
.page-faq .faq-quick a:focus-visible {
  color: var(--ember-deep);
}

.page-faq .faq-quick a:hover::before,
.page-faq .faq-quick a:focus-visible::before {
  background: var(--ember);
}

/* ---------- 两栏骨架 ---------- */
.page-faq .faq-layout {
  padding: 48px 0 72px;
}

.page-faq .faq-index {
  margin-bottom: 36px;
}

.page-faq .faq-index-title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--clay);
}

.page-faq .faq-index-list {
  list-style: none;
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 8px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-faq .faq-index-list li {
  flex: 0 0 auto;
}

.page-faq .faq-index-link {
  display: block;
  padding: 9px 14px;
  border: 1px solid var(--line);
  background: var(--white);
  color: var(--stone);
  font-size: 13px;
  line-height: 1.4;
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.page-faq .faq-index-link .mono {
  margin-right: 6px;
  color: var(--clay);
}

.page-faq .faq-index-link:hover,
.page-faq .faq-index-link:focus-visible {
  color: var(--pine);
  border-color: var(--ice);
  background: var(--frost);
}

@media (min-width: 960px) {
  .page-faq .faq-hero {
    padding: 34px 0 78px;
  }

  .page-faq .faq-hero-grid {
    grid-template-columns: minmax(0, 1.25fr) minmax(280px, 0.75fr);
    align-items: end;
    gap: 56px;
  }

  .page-faq .faq-hero-copy {
    padding-bottom: 6px;
  }

  .page-faq .faq-layout {
    display: grid;
    grid-template-columns: 248px minmax(0, 1fr);
    gap: 64px;
    padding: 76px 0 104px;
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--header-h) + 28px);
    align-self: start;
    margin-bottom: 0;
  }

  .page-faq .faq-index-list {
    display: block;
    overflow: visible;
    padding: 0 0 0 18px;
    position: relative;
  }

  .page-faq .faq-index-list::before {
    content: "";
    position: absolute;
    left: 0;
    top: 2px;
    bottom: 2px;
    width: 2px;
    background: linear-gradient(180deg, var(--ice), var(--frost) 68%, rgba(228, 236, 242, 0));
  }

  .page-faq .faq-index-list li + li {
    margin-top: 2px;
  }

  .page-faq .faq-index-link {
    border: 0;
    border-left: 2px solid transparent;
    background: transparent;
    white-space: normal;
    padding: 9px 8px 9px 10px;
    font-size: 14px;
    line-height: 1.55;
  }

  .page-faq .faq-index-link:hover,
  .page-faq .faq-index-link:focus-visible {
    background: transparent;
    border-left-color: var(--ember);
    color: var(--pine);
  }
}

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

.page-faq .faq-group + .faq-group {
  margin-top: 58px;
}

.page-faq .faq-group-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 14px;
  border-bottom: 2px solid var(--pine);
}

.page-faq .faq-group-head .index-num {
  flex: none;
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--ember);
}

.page-faq .faq-group-title {
  flex: 1 1 auto;
  margin: 0;
  font-size: clamp(22px, 2.6vw, 30px);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--pine);
}

.page-faq .faq-group-head .tag {
  flex: none;
}

.page-faq .faq-list {
  margin-top: 4px;
}

/* ---------- 问答条目 ---------- */
.page-faq .qa {
  border-bottom: 1px solid var(--line);
  border-left: 3px solid transparent;
  transition: border-color 0.24s var(--ease), background-color 0.24s var(--ease);
}

.page-faq .qa[open] {
  border-left-color: var(--ember);
  background: linear-gradient(90deg, rgba(255, 122, 52, 0.08), rgba(255, 122, 52, 0) 58%);
}

.page-faq .qa summary {
  position: relative;
  display: block;
  padding: 17px 42px 17px 13px;
  cursor: pointer;
  list-style: none;
  font-size: 17px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--ink);
  transition: color 0.2s var(--ease);
}

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

.page-faq .qa summary::marker {
  content: "";
}

.page-faq .qa summary::after {
  content: "";
  position: absolute;
  top: 50%;
  right: 16px;
  width: 14px;
  height: 2px;
  background: var(--stone);
  transform: translateY(-50%);
  transition: background-color 0.24s var(--ease);
}

.page-faq .qa summary::before {
  content: "";
  position: absolute;
  top: 50%;
  right: 22px;
  width: 2px;
  height: 14px;
  background: var(--stone);
  transform: translateY(-50%);
  transition: transform 0.24s var(--ease), background-color 0.24s var(--ease);
}

.page-faq .qa[open] summary::before {
  transform: translateY(-50%) scaleY(0);
}

.page-faq .qa[open] summary::before,
.page-faq .qa[open] summary::after {
  background: var(--ember);
}

.page-faq .qa summary:hover {
  color: var(--ember-deep);
}

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

.page-faq .qa-body {
  padding: 0 42px 20px 13px;
  font-size: 16px;
  line-height: 1.78;
  color: var(--ink);
}

.page-faq .qa-body > :first-child {
  margin-top: 0;
}

.page-faq .qa-body > :last-child {
  margin-bottom: 0;
}

.page-faq .qa-body p {
  margin: 0 0 0.85em;
}

.page-faq .qa-body ol,
.page-faq .qa-body ul {
  margin: 0.7em 0 0.9em;
  padding-left: 1.4em;
}

.page-faq .qa-body li {
  margin-bottom: 0.4em;
}

.page-faq .qa-body li::marker {
  color: var(--ice-deep);
  font-family: var(--font-mono);
}

.page-faq .qa-body a {
  color: var(--ice-deep);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .qa-body .hl {
  padding: 1px 4px;
}

/* ---------- 图 ---------- */
.page-faq .faq-figure {
  margin: 20px 0 26px;
  background: var(--frost);
  clip-path: polygon(0 0, calc(100% - var(--faq-cut)) 0, 100% var(--faq-cut), 100% 100%, 0 100%);
}

.page-faq .faq-figure--square {
  max-width: 460px;
}

.page-faq .faq-figure .frame-caption {
  display: block;
  padding: 10px 16px 12px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--stone);
  background: var(--white);
}

/* ---------- 三步自检 ---------- */
.page-faq .faq-check {
  margin: 26px 0 8px;
  padding: 22px 20px 20px;
  background: linear-gradient(140deg, var(--pine) 0%, #143C42 100%);
  color: var(--snow);
  clip-path: polygon(0 0, calc(100% - 22px) 0, 100% 22px, 100% 100%, 0 100%);
}

.page-faq .faq-check-title {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--gold);
}

.page-faq .faq-check-arrow {
  display: block;
  width: 100%;
  max-width: 330px;
  height: auto;
  margin: 0 0 14px;
  opacity: 0.9;
}

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

.page-faq .faq-check-list li {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  gap: 10px;
  align-items: start;
}

.page-faq .faq-check-num {
  padding-top: 2px;
  font-size: 13px;
  color: var(--ice);
}

.page-faq .faq-check-list p {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: rgba(246, 248, 250, 0.9);
}

/* ---------- 结尾入口 ---------- */
.page-faq .faq-cta {
  display: grid;
  gap: 16px;
  margin-top: 60px;
  padding: 26px 24px;
  background: linear-gradient(135deg, var(--moss) 0%, var(--pine) 100%);
  color: var(--snow);
  clip-path: polygon(0 0, calc(100% - 22px) 0, 100% 22px, 100% 100%, 0 100%);
}

.page-faq .faq-cta p {
  margin: 0;
  font-size: 16px;
  line-height: 1.75;
  color: rgba(246, 248, 250, 0.92);
}

.page-faq .faq-cta strong {
  color: var(--white);
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.01em;
  word-break: break-all;
}

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

.page-faq .faq-cta .btn-ghost {
  color: var(--snow);
  border-color: rgba(246, 248, 250, 0.5);
  background: transparent;
}

.page-faq .faq-cta .btn-ghost:hover,
.page-faq .faq-cta .btn-ghost:focus-visible {
  color: var(--pine);
  background: var(--snow);
  border-color: var(--snow);
}

@media (min-width: 640px) {
  .page-faq .qa summary {
    padding: 19px 48px 19px 16px;
    font-size: 18px;
  }

  .page-faq .qa-body {
    padding: 0 48px 24px 16px;
  }

  .page-faq .faq-check {
    padding: 26px 26px 24px;
  }

  .page-faq .faq-cta {
    padding: 30px 30px;
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (min-width: 960px) {
  .page-faq .faq-group + .faq-group {
    margin-top: 72px;
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa summary::before,
  .page-faq .qa summary::after,
  .page-faq .faq-index-link,
  .page-faq .faq-quick a {
    transition: none;
  }
}