.page-faq {
  --faq-tone: var(--cyan);
  --faq-cut: 12px;
  background: var(--bg-night);
  color: var(--text);
  overflow-x: clip;
}

.page-faq .breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 18px 0 4px;
  font-size: 13px;
  color: var(--muted);
}

.page-faq .breadcrumb a {
  color: var(--muted);
  text-decoration: none;
  transition: color .18s var(--ease);
}

.page-faq .breadcrumb a:hover {
  color: var(--accent-warm);
}

.page-faq .breadcrumb__sep {
  color: var(--line);
}

/* ---------- 页头 ---------- */

.page-faq .faq-hero {
  position: relative;
  padding: 22px 0 32px;
  background:
    radial-gradient(760px 360px at 8% -20%, rgba(56, 214, 224, .15), transparent 62%),
    radial-gradient(680px 340px at 92% 0%, rgba(255, 90, 54, .17), transparent 62%),
    linear-gradient(180deg, var(--bg-night) 0%, var(--bg-deep) 100%);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(230, 238, 247, .05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(230, 238, 247, .05) 1px, transparent 1px);
  background-size: 46px 46px;
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, .7), transparent 88%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, .7), transparent 88%);
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 26px;
  align-items: center;
}

.page-faq .faq-hero__copy .eyebrow {
  margin: 0 0 12px;
  color: var(--accent-warm);
}

.page-faq .faq-hero h1 {
  margin: 0 0 14px;
  font-family: var(--sans);
  font-size: clamp(27px, 6.4vw, 44px);
  font-weight: 800;
  line-height: 1.16;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-faq .faq-hero .lede {
  margin: 0;
  max-width: 58ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--muted);
}

.page-faq .faq-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
  margin: 22px 0 0;
  padding: 0;
}

.page-faq .faq-stats__item {
  padding: 10px 12px;
  background: rgba(18, 50, 74, .58);
  border: 1px solid var(--line);
  border-left: 2px solid var(--accent);
  border-radius: 2px;
}

.page-faq .faq-stats__k {
  font-size: 11.5px;
  letter-spacing: .08em;
  color: var(--muted);
}

.page-faq .faq-stats__v {
  margin: 4px 0 0;
  font-size: 17px;
  font-weight: 700;
  color: var(--text);
}

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

.page-faq .figure__frame--cut {
  position: relative;
  overflow: hidden;
  background: var(--bg-panel);
  border: 1px solid var(--line);
  clip-path: polygon(0 0, calc(100% - 20px) 0, 100% 20px, 100% 100%, 20px 100%, 0 calc(100% - 20px));
}

.page-faq .figure__frame--cut::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: linear-gradient(rgba(230, 238, 247, .06) 1px, transparent 1px);
  background-size: 100% 30px;
}

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

.page-faq .figure__cap {
  margin-top: 10px;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 主体骨架 ---------- */

.page-faq .faq-shell {
  display: grid;
  gap: 24px;
  align-items: start;
  padding-top: 30px;
  padding-bottom: 64px;
}

.page-faq .faq-index {
  padding: 16px 16px 18px;
  background: linear-gradient(180deg, rgba(18, 50, 74, .74), rgba(14, 26, 51, .92));
  border: 1px solid var(--line);
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 14px 100%, 0 calc(100% - 14px));
}

.page-faq .faq-index__title {
  margin: 0 0 12px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--accent-warm);
}

.page-faq .faq-index__list {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: max-content;
  gap: 4px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-faq .faq-index__link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 10px;
  white-space: nowrap;
  font-size: 14px;
  color: var(--muted);
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: color .18s var(--ease), background-color .18s var(--ease), border-color .18s var(--ease);
}

.page-faq .faq-index__link:hover {
  color: var(--text);
  background: rgba(56, 214, 224, .08);
}

.page-faq .faq-index__link.is-on,
.page-faq .faq-index__link[aria-current] {
  color: var(--text);
  border-left-color: var(--accent);
  background: rgba(255, 90, 54, .13);
}

.page-faq .faq-index__num {
  font-size: 11.5px;
  color: var(--accent-warm);
}

.page-faq .faq-index__note {
  margin: 14px 0 0;
  padding-top: 12px;
  border-top: 1px solid var(--line);
  font-size: 12.5px;
  line-height: 1.75;
  color: var(--muted);
}

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

/* ---------- 分组 ---------- */

.page-faq .faq-group {
  margin: 0 0 34px;
  scroll-margin-top: 118px;
}

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

.page-faq .faq-group--cyan { --tone: var(--cyan); }
.page-faq .faq-group--amber { --tone: var(--amber); }
.page-faq .faq-group--rose { --tone: var(--rose); }
.page-faq .faq-group--green { --tone: var(--green); }
.page-faq .faq-group--accent { --tone: var(--accent); }
.page-faq .faq-group--muted { --tone: var(--muted); }

.page-faq .faq-group__head {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
  padding-bottom: 11px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-group__mark {
  flex: none;
  width: 10px;
  height: 10px;
  background: var(--tone, var(--accent));
  transform: rotate(45deg);
}

.page-faq .faq-group__num {
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--muted);
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--sans);
  font-size: clamp(18px, 3.4vw, 22px);
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--text);
}

/* ---------- 问答条目 ---------- */

.page-faq .qa {
  position: relative;
  margin-bottom: 10px;
  background: linear-gradient(180deg, rgba(18, 50, 74, .62), rgba(11, 22, 42, .88));
  border: 1px solid var(--line);
  border-left: 3px solid var(--tone, var(--line));
  clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 12px 100%, 0 calc(100% - 12px));
  transition: background-color .2s var(--ease);
}

.page-faq .qa[open] {
  background: linear-gradient(180deg, rgba(23, 62, 90, .8), rgba(11, 22, 42, .92));
}

.page-faq .qa__q {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  position: relative;
  padding: 14px 44px 14px 16px;
  list-style: none;
  cursor: pointer;
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.62;
  color: var(--text);
}

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

.page-faq .qa__q::after {
  content: "";
  position: absolute;
  top: 19px;
  right: 19px;
  width: 10px;
  height: 10px;
  border-right: 2px solid var(--muted);
  border-bottom: 2px solid var(--muted);
  transform: rotate(45deg);
  transition: transform .2s var(--ease), border-color .2s var(--ease);
}

.page-faq .qa[open] .qa__q::after {
  transform: rotate(225deg);
  border-color: var(--tone, var(--accent));
}

.page-faq .qa__label {
  flex: none;
  margin-top: 2px;
  font-size: 11.5px;
  font-weight: 700;
  color: var(--tone, var(--accent));
}

.page-faq .qa__a {
  padding: 13px 18px 16px 16px;
  border-top: 1px solid var(--line);
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

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

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

.page-faq .qa__steps {
  margin: 0 0 4px;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
  counter-reset: faqstep;
}

.page-faq .qa__steps li {
  position: relative;
  padding-left: 34px;
  counter-increment: faqstep;
}

.page-faq .qa__steps li::before {
  content: counter(faqstep, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 3px;
  padding: 1px 4px;
  font-family: var(--mono);
  font-size: 11px;
  line-height: 1.3;
  color: var(--rose);
  border: 1px solid rgba(255, 78, 122, .45);
}

.page-faq .qa__next {
  margin: 12px 0 0;
  font-size: 13.5px;
}

.page-faq .qa__next a {
  color: var(--accent-warm);
  text-decoration: none;
  border-bottom: 1px dotted rgba(255, 138, 61, .55);
  transition: color .18s var(--ease), border-color .18s var(--ease);
}

.page-faq .qa__next a:hover {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

/* ---------- 勘误流程配图 ---------- */

.page-faq .faq-fix-visual {
  margin: 0 0 34px;
}

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

/* ---------- 收尾 ---------- */

.page-faq .faq-cta {
  padding: 22px 20px 24px;
  background:
    linear-gradient(135deg, rgba(255, 90, 54, .16), rgba(18, 50, 74, .7) 58%),
    var(--bg-deep);
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent);
  clip-path: polygon(0 0, calc(100% - 16px) 0, 100% 16px, 100% 100%, 16px 100%, 0 calc(100% - 16px));
}

.page-faq .faq-cta h2 {
  margin: 0 0 8px;
  font-family: var(--sans);
  font-size: 20px;
  font-weight: 800;
  color: var(--text);
}

.page-faq .faq-cta p {
  margin: 0 0 16px;
  max-width: 60ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--muted);
}

.page-faq .faq-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 响应式 ---------- */

@media (min-width: 560px) {
  .page-faq .faq-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 880px) {
  .page-faq .faq-hero {
    padding: 30px 0 42px;
  }

  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, .94fr);
    gap: 44px;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-shell {
    grid-template-columns: 240px minmax(0, 1fr);
    gap: 40px;
    padding-top: 38px;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 96px;
    padding: 18px 18px 20px;
  }

  .page-faq .faq-index__list {
    grid-auto-flow: row;
    grid-auto-columns: auto;
    gap: 2px;
    overflow-x: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-index__link {
    display: flex;
    width: 100%;
    white-space: normal;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa__q::after,
  .page-faq .qa,
  .page-faq .faq-index__link,
  .page-faq .qa__next a {
    transition: none;
  }
}