.page-faq {
  --faq-rail: 224px;
  --faq-gap: clamp(24px, 3.4vw, 52px);
  padding-top: calc(var(--bar-h) + 12px);
  padding-bottom: clamp(56px, 9vw, 104px);
}

@media (min-width: 1100px) {
  .page-faq {
    padding-top: clamp(24px, 3vw, 48px);
  }
}

/* ---------- 面包屑 ---------- */
.page-faq .crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--muted);
}

.page-faq .crumbs a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(35, 230, 208, .35);
  padding-bottom: 1px;
}

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

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

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  display: grid;
  gap: clamp(24px, 3.6vw, 48px);
  margin-top: clamp(20px, 3vw, 36px);
  padding-bottom: clamp(28px, 4.5vw, 56px);
  border-bottom: 1px solid var(--hair);
}

@media (min-width: 880px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, .9fr);
    align-items: end;
  }
}

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

.page-faq .faq-h1 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.95rem, 5.6vw, 3.5rem);
  line-height: 1.06;
  letter-spacing: -0.02em;
  margin: 12px 0 0;
  color: var(--paper);
  max-width: 22ch;
}

.page-faq .faq-hero__lead {
  margin: clamp(14px, 2vw, 22px) 0 0;
  max-width: 46ch;
  color: var(--muted);
  font-size: clamp(15px, 1.6vw, 16.5px);
  line-height: 1.8;
}

.page-faq .faq-quick {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1px;
  margin: clamp(20px, 3vw, 30px) 0 0;
  background: var(--hair-soft);
  border: 1px solid var(--hair-soft);
}

.page-faq .faq-quick__item {
  background: var(--ink);
  padding: 12px 14px;
  display: grid;
  gap: 6px;
  align-content: start;
}

.page-faq .faq-quick__label {
  margin: 0;
  font-size: 12px;
  color: var(--muted);
  letter-spacing: .02em;
  line-height: 1.5;
}

.page-faq .faq-quick__val {
  margin: 0;
  display: flex;
  align-items: baseline;
  gap: 4px;
}

.page-faq .faq-quick__val .num {
  font-family: var(--mono);
  font-size: clamp(1.5rem, 3vw, 2rem);
  line-height: 1;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-quick__val .unit {
  font-size: 12px;
  color: var(--muted);
}

/* ---------- 图片 ---------- */
.page-faq .faq-figure {
  position: relative;
  margin: 0;
  border: 1px solid var(--hair);
  background: var(--ink-2);
}

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

.page-faq .faq-figure--hero img {
  aspect-ratio: 4 / 3;
}

.page-faq .faq-figure--hero::before {
  content: "";
  position: absolute;
  left: -1px;
  top: -1px;
  width: 52px;
  height: 3px;
  background: var(--cyan);
}

.page-faq .faq-figure--inline {
  margin: 0 0 20px;
}

.page-faq .faq-figure--inline img {
  aspect-ratio: 10 / 7;
}

.page-faq .faq-figcap {
  padding: 10px 14px;
  border-top: 1px solid var(--hair-soft);
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 主体两栏 ---------- */
.page-faq .faq-layout {
  display: grid;
  gap: var(--faq-gap);
  margin-top: clamp(30px, 5vw, 62px);
}

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

/* ---------- 左侧分组索引 ---------- */
.page-faq .faq-index {
  display: grid;
  gap: 12px;
}

.page-faq .faq-index__cap {
  margin: 0;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--line);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-left: 1px solid var(--hair);
}

.page-faq .faq-index__list li {
  margin: 0;
}

.page-faq .faq-index__list a {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  align-items: center;
  gap: 6px;
  padding: 8px 10px 8px 13px;
  margin-left: -1px;
  border-left: 2px solid transparent;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.5;
  text-decoration: none;
  transition: color .18s ease, border-color .18s ease, background-color .18s ease;
}

.page-faq .faq-index__list a:hover,
.page-faq .faq-index__list a:focus-visible {
  color: var(--paper);
  border-left-color: var(--cyan);
  background: rgba(35, 230, 208, .07);
}

.page-faq .faq-index__list .num {
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--line);
}

.page-faq .faq-index__list a:hover .num,
.page-faq .faq-index__list a:focus-visible .num {
  color: var(--cyan);
}

.page-faq .faq-index__foot {
  margin: 0;
  padding-top: 12px;
  border-top: 1px solid var(--hair-soft);
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

.page-faq .faq-index__foot a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(35, 230, 208, .4);
}

@media (min-width: 1000px) {
  .page-faq .faq-index {
    position: sticky;
    top: 24px;
    align-self: start;
  }
}

@media (max-width: 999px) {
  .page-faq .faq-index__list {
    display: flex;
    gap: 0;
    overflow-x: auto;
    border-left: 0;
    border-bottom: 1px solid var(--hair);
    scrollbar-width: none;
    -ms-overflow-style: none;
  }

  .page-faq .faq-index__list::-webkit-scrollbar {
    display: none;
  }

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

  .page-faq .faq-index__list a {
    grid-template-columns: auto minmax(0, auto);
    gap: 7px;
    white-space: nowrap;
    margin-left: 0;
    margin-bottom: -1px;
    border-left: 0;
    border-bottom: 2px solid transparent;
    padding: 10px 14px;
    font-size: 13.5px;
  }

  .page-faq .faq-index__list a:hover,
  .page-faq .faq-index__list a:focus-visible {
    border-left-color: transparent;
    border-bottom-color: var(--cyan);
  }
}

/* ---------- 问答分组 ---------- */
.page-faq .faq-sections {
  min-width: 0;
  display: grid;
  gap: clamp(32px, 5vw, 56px);
}

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

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  column-gap: 10px;
  align-items: baseline;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--hair);
  margin-bottom: 18px;
}

.page-faq .faq-group__num {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--cyan);
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.3rem, 3vw, 1.85rem);
  letter-spacing: -0.01em;
  line-height: 1.2;
  color: var(--paper);
}

.page-faq .faq-group__lead {
  grid-column: 2;
  margin: 8px 0 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--muted);
}

.page-faq .faq-flow {
  display: block;
  width: min(260px, 100%);
  height: auto;
  margin: 0 0 16px;
  color: var(--cyan);
  opacity: .7;
}

/* ---------- 问答卡 ---------- */
.page-faq .faq-list {
  display: grid;
}

.page-faq .qa-card {
  border: 1px solid var(--hair);
  background: var(--ink-2);
  transition: border-color .2s ease, background-color .2s ease;
}

.page-faq .qa-card + .qa-card {
  margin-top: -1px;
}

.page-faq .qa-card[open] {
  position: relative;
  z-index: 1;
  border-color: rgba(35, 230, 208, .38);
  background: var(--ink);
}

.page-faq .qa-card summary {
  display: grid;
  grid-template-columns: 18px minmax(0, 1fr);
  align-items: center;
  gap: 12px;
  padding: 15px 16px;
  cursor: pointer;
  list-style: none;
  color: var(--paper);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.6;
  transition: color .18s ease, background-color .18s ease;
}

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

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

.page-faq .qa-card summary:hover {
  background: rgba(35, 230, 208, .05);
}

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

.page-faq .qa-card[open] > summary {
  background: rgba(35, 230, 208, .06);
}

.page-faq .qa-mark {
  position: relative;
  display: block;
  width: 12px;
  height: 12px;
  justify-self: center;
}

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

.page-faq .qa-mark::before {
  left: 50%;
  top: 0;
  width: 1.5px;
  height: 100%;
  transform: translateX(-50%);
}

.page-faq .qa-mark::after {
  top: 50%;
  left: 0;
  width: 100%;
  height: 1.5px;
  transform: translateY(-50%);
}

.page-faq .qa-card[open] .qa-mark::before {
  background: var(--cyan);
}

.page-faq .qa-card[open] .qa-mark::after {
  opacity: 0;
  transform: translateY(-50%) scaleX(0);
}

/* ---------- 答案区 ---------- */
.page-faq .qa-body {
  position: relative;
  padding: 2px 18px 20px 46px;
  max-width: 62ch;
  color: var(--muted);
  font-size: 14.5px;
  line-height: 1.85;
  overflow-wrap: break-word;
}

.page-faq .qa-body::before {
  content: "";
  position: absolute;
  left: 16px;
  top: 4px;
  bottom: 22px;
  width: 14px;
  background-image: repeating-linear-gradient(
    to bottom,
    var(--hair) 0,
    var(--hair) 1px,
    transparent 1px,
    transparent 7px
  );
  opacity: .85;
}

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

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

.page-faq .qa-body a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(35, 230, 208, .4);
}

.page-faq .qa-body a:hover {
  border-bottom-color: var(--cyan);
}

.page-faq .qa-steps {
  list-style: none;
  margin: 10px 0 12px;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-faq .qa-steps li {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  gap: 8px;
  align-items: baseline;
}

.page-faq .qa-step-num {
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: .06em;
  color: var(--cyan);
}

@keyframes faq-fade-in {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}

.page-faq .qa-card[open] .qa-body {
  animation: faq-fade-in .28s ease both;
}

/* ---------- 关键提示 ---------- */
.page-faq .faq-note {
  margin: 16px 0 0;
  padding: 12px 14px;
  border-left: 3px solid var(--stoppage);
  background: rgba(255, 90, 43, .07);
  color: var(--paper);
  font-size: 13.5px;
  line-height: 1.75;
}

/* ---------- 结尾引导 ---------- */
.page-faq .faq-followup {
  margin-top: clamp(40px, 6vw, 72px);
  padding: clamp(22px, 4vw, 40px);
  border: 1px solid var(--hair);
  background:
    linear-gradient(135deg, rgba(35, 230, 208, .1), rgba(6, 10, 14, 0) 58%),
    var(--ink-2);
  display: grid;
  gap: 14px;
  justify-items: start;
}

.page-faq .faq-followup__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.2rem, 2.6vw, 1.7rem);
  letter-spacing: -0.01em;
  line-height: 1.25;
  color: var(--paper);
}

.page-faq .faq-followup__text {
  margin: 0;
  max-width: 58ch;
  color: var(--muted);
  font-size: 14.5px;
  line-height: 1.85;
}

.page-faq .faq-followup__actions {
  gap: 10px;
}

/* ---------- 窄屏与动效兼容 ---------- */
@media (max-width: 420px) {
  .page-faq .qa-card summary {
    font-size: 14.5px;
    padding: 14px;
  }

  .page-faq .qa-body {
    padding-left: 34px;
    padding-right: 14px;
  }

  .page-faq .qa-body::before {
    left: 10px;
    width: 12px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa-card[open] .qa-body {
    animation: none;
  }

  .page-faq .qa-mark::before,
  .page-faq .qa-mark::after,
  .page-faq .qa-card,
  .page-faq .qa-card summary,
  .page-faq .faq-index__list a {
    transition: none;
  }
}