.page-faq {
  --faq-rail: 236px;
  --faq-text: #C3CBD6;
  --faq-gap: 24px;
  display: block;
  overflow-x: hidden;
}

/* ---------- 顶部与首屏 ---------- */
.page-faq .faq-top {
  padding-top: 18px;
}

.page-faq .faq-hero {
  position: relative;
  margin-top: 14px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(120% 100% at 88% 0%, rgba(0, 230, 210, 0.12), transparent 58%),
    radial-gradient(80% 90% at 4% 100%, rgba(255, 45, 122, 0.10), transparent 62%),
    var(--ink);
  overflow: hidden;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
    0deg,
    rgba(242, 245, 247, 0.07) 0px,
    rgba(242, 245, 247, 0.07) 1px,
    transparent 1px,
    transparent 5px
  );
  opacity: 0.5;
  pointer-events: none;
  -webkit-mask-image: linear-gradient(90deg, transparent 0%, #000 58%, #000 100%);
  mask-image: linear-gradient(90deg, transparent 0%, #000 58%, #000 100%);
}

.page-faq .faq-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 28px;
  padding: 34px 0 44px;
}

.page-faq .faq-hero__kicker {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 16px;
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-faq .faq-hero__kicker::before {
  content: "";
  width: 28px;
  height: 1px;
  background: var(--cyan);
  flex: none;
}

.page-faq .faq-hero__title {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(34px, 7.4vw, 76px);
  line-height: 0.98;
  letter-spacing: -0.015em;
  color: var(--white);
}

.page-faq .faq-hero__title .hl {
  color: var(--cyan);
  text-shadow: 0 0 24px rgba(0, 230, 210, 0.35);
}

.page-faq .faq-hero__lede {
  margin: 0;
  max-width: 62ch;
  font-size: 16.5px;
  line-height: 1.8;
  color: var(--faq-text);
}

.page-faq .symptom-legend {
  margin: 26px 0 10px;
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--gray);
}

.page-faq .symptom-wall {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin-top: 10px;
}

.page-faq .symptom {
  display: inline-block;
  padding: 8px 14px;
  border: 1px solid var(--line);
  background: rgba(11, 18, 32, 0.78);
  color: var(--gray);
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.3;
  text-decoration: none;
  transition: color 0.18s ease, border-color 0.18s ease, background 0.18s ease;
}

.page-faq .symptom:hover,
.page-faq .symptom:focus-visible {
  color: var(--ink);
  background: var(--cyan);
  border-color: var(--cyan);
}

.page-faq .symptom--hot {
  background: var(--yellow);
  border-color: var(--yellow);
  color: var(--ink);
  font-weight: 700;
}

.page-faq .symptom--hot:hover,
.page-faq .symptom--hot:focus-visible {
  background: var(--white);
  border-color: var(--white);
  color: var(--ink);
}

.page-faq .faq-hero__fig {
  position: relative;
  margin: 0;
  border: 1px solid var(--line);
  background: var(--ink-2);
  box-shadow: var(--shadow-1);
}

.page-faq .faq-hero__fig::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), var(--magenta));
}

.page-faq .faq-hero__fig img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1400 / 500;
  object-fit: cover;
}

.page-faq .faq-hero__cap {
  display: block;
  padding: 10px 14px;
  border-top: 1px solid var(--line);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--gray);
}

/* ---------- 分栏骨架 ---------- */
.page-faq .faq-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 32px;
  padding-top: 42px;
}

.page-faq .faq-rail {
  border: 1px solid var(--line);
  background: var(--ink-2);
  padding: 14px 0;
}

.page-faq .faq-rail__title {
  margin: 0 0 10px;
  padding: 0 18px;
  font-size: 11.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-faq .faq-rail__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .faq-rail__link {
  display: block;
  padding: 9px 18px;
  border-left: 2px solid transparent;
  color: var(--gray);
  font-size: 14px;
  line-height: 1.5;
  text-decoration: none;
  transition: color 0.18s ease, background 0.18s ease, border-color 0.18s ease;
}

.page-faq .faq-rail__link:hover {
  color: var(--white);
  background: rgba(0, 230, 210, 0.05);
}

.page-faq .faq-rail__link[aria-current="true"] {
  color: var(--cyan);
  border-left-color: var(--magenta);
  background: rgba(0, 230, 210, 0.08);
}

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

/* ---------- 区块头 ---------- */
.page-faq .faq-block {
  margin-bottom: 56px;
  scroll-margin-top: 118px;
}

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

.page-faq .faq-block__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  column-gap: 14px;
  row-gap: 6px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 18px;
}

.page-faq .faq-block__no {
  grid-row: span 2;
  align-self: start;
  padding-top: 6px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--yellow);
}

.page-faq .faq-block__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(22px, 3.2vw, 32px);
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-faq .faq-block__sub {
  grid-column: 2;
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--gray);
}

/* ---------- 折叠问答 ---------- */
.page-faq .acc {
  border-top: 1px solid var(--line);
}

.page-faq .acc__item {
  border: 1px solid var(--line);
  border-top: 0;
  background: var(--ink-2);
  scroll-margin-top: 118px;
  transition: border-color 0.18s ease, background 0.18s ease;
}

.page-faq .acc__item:hover {
  border-color: var(--cyan-dim);
}

.page-faq .acc__item:target {
  border-color: var(--yellow);
  background: rgba(255, 212, 0, 0.06);
  box-shadow: inset 3px 0 0 var(--yellow);
}

.page-faq .acc__sum {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
  font-size: 16px;
  line-height: 1.5;
  color: var(--white);
}

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

.page-faq .acc__sum::after {
  content: "+";
  margin-left: auto;
  flex: none;
  font-family: var(--font-mono);
  font-size: 16px;
  line-height: 1;
  color: var(--cyan);
}

.page-faq .acc__item[open] > .acc__sum::after {
  content: "-";
  color: var(--magenta);
}

.page-faq .acc__item[open] > .acc__sum {
  border-bottom: 1px solid var(--line);
}

.page-faq .acc__no {
  flex: none;
  min-width: 34px;
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--yellow);
}

.page-faq .acc__body {
  padding: 16px 18px 20px 64px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--faq-text);
}

.page-faq .acc__why {
  margin: 12px 0 0;
  padding-left: 12px;
  border-left: 2px solid var(--line);
  font-size: 14px;
  line-height: 1.75;
  color: var(--gray);
}

.page-faq .acc__copy {
  margin: 14px 0 0;
}

/* ---------- 步骤清单 ---------- */
.page-faq .steps {
  counter-reset: step;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .steps > li {
  position: relative;
  counter-increment: step;
  padding-left: 36px;
  margin-bottom: 10px;
}

.page-faq .steps > li:last-child {
  margin-bottom: 0;
}

.page-faq .steps > li::before {
  content: counter(step, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 2px;
  padding: 1px 4px;
  border: 1px solid var(--cyan-dim);
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.4;
  color: var(--cyan);
}

/* ---------- 流程 ---------- */
.page-faq .faq-flow-fig {
  margin: 0 0 22px;
  border: 1px solid var(--line);
  background: var(--ink-2);
  position: relative;
  overflow: hidden;
}

.page-faq .faq-flow-fig::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(115deg, rgba(0, 230, 210, 0.10), transparent 45%);
  pointer-events: none;
}

.page-faq .faq-flow-fig img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1000 / 600;
  object-fit: cover;
}

.page-faq .flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-faq .flow__node {
  background: var(--ink-2);
  padding: 18px 16px 20px;
  position: relative;
  overflow: hidden;
}

.page-faq .flow__node::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
}

.page-faq .flow__node--cyan::before {
  background: var(--cyan);
}

.page-faq .flow__node--yellow::before {
  background: var(--yellow);
}

.page-faq .flow__node--magenta::before {
  background: var(--magenta);
}

.page-faq .flow__idx {
  display: block;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--gray);
}

.page-faq .flow__name {
  margin: 8px 0 6px;
  font-family: var(--font-display);
  font-size: 19px;
  color: var(--white);
}

.page-faq .flow__desc {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--gray);
}

/* ---------- 准备清单 ---------- */
.page-faq .checklist {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
}

.page-faq .checklist > li {
  border-left: 2px solid var(--cyan-dim);
  padding-left: 16px;
}

.page-faq .checklist b {
  display: block;
  margin-bottom: 4px;
  font-size: 15px;
  color: var(--white);
}

.page-faq .checklist span {
  display: block;
  font-size: 14px;
  line-height: 1.75;
  color: var(--gray);
}

.page-faq .faq-prepare__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin: 24px 0 0;
}

/* ---------- 工单状态 ---------- */
.page-faq .status-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-faq .status-row {
  background: var(--ink-2);
  padding: 16px 18px;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px;
  align-items: baseline;
}

.page-faq .status-row p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--faq-text);
}

.page-faq .faq-status__note {
  margin: 20px 0 0;
  padding: 14px 16px;
  border: 1px dashed var(--line);
  font-size: 14px;
  line-height: 1.75;
  color: var(--gray);
}

/* ---------- 结尾行动条 ---------- */
.page-faq .faq-cta {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
  margin: 56px 0 88px;
  padding: 26px 22px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--cyan);
  background:
    linear-gradient(100deg, rgba(0, 230, 210, 0.10), transparent 52%),
    var(--ink-2);
}

.page-faq .faq-cta__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: clamp(21px, 3vw, 28px);
  line-height: 1.2;
  color: var(--white);
}

.page-faq .faq-cta__body p {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--faq-text);
}

.page-faq .faq-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: flex-start;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-faq .checklist {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px 24px;
  }

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

  .page-faq .status-row {
    grid-template-columns: 116px minmax(0, 1fr);
    gap: 18px;
  }

  .page-faq .faq-cta {
    padding: 30px 28px;
  }
}

@media (min-width: 940px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    align-items: center;
    gap: 44px;
    padding: 58px 0 66px;
  }

  .page-faq .flow {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq .faq-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 32px;
    padding: 34px 32px;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-shell {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
    gap: 44px;
    padding-top: 52px;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: 112px;
    align-self: start;
    max-height: calc(100vh - 140px);
    overflow-y: auto;
  }
}

@media (max-width: 1023px) {
  .page-faq .faq-rail {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  .page-faq .faq-rail__title {
    display: none;
  }

  .page-faq .faq-rail__list {
    display: flex;
    gap: 8px;
  }

  .page-faq .faq-rail__link {
    white-space: nowrap;
    border-left: 0;
    border-bottom: 2px solid transparent;
    padding: 6px 10px;
    font-size: 13px;
  }

  .page-faq .faq-rail__link[aria-current="true"] {
    border-left-color: transparent;
    border-bottom-color: var(--magenta);
  }
}

@media (max-width: 560px) {
  .page-faq .acc__body {
    padding: 14px 14px 18px 18px;
  }

  .page-faq .acc__sum {
    padding: 14px 14px;
    font-size: 15px;
    gap: 10px;
  }

  .page-faq .acc__no {
    min-width: 30px;
  }

  .page-faq .symptom {
    font-size: 12px;
    padding: 7px 11px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .symptom,
  .page-faq .faq-rail__link,
  .page-faq .acc__item {
    transition: none;
  }
}