.page-faq {
  --faq-rail: 292px;
  --faq-accent: var(--magenta);
  background-color: var(--paper);
  color: var(--on-light);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  background-color: var(--ink);
  color: var(--on-dark);
  background-image:
    var(--scan),
    repeating-linear-gradient(118deg, rgba(255, 46, 147, .09) 0 2px, transparent 2px 30px),
    repeating-linear-gradient(62deg, rgba(44, 123, 255, .07) 0 2px, transparent 2px 46px);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: var(--spectrum);
  z-index: 2;
}

.page-faq .faq-hero .breadcrumbs {
  padding-top: clamp(20px, 3vw, 34px);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .04em;
}

.page-faq .faq-hero .breadcrumbs a {
  color: rgba(244, 239, 230, .62);
  text-decoration: none;
}

.page-faq .faq-hero .breadcrumbs a:hover {
  color: var(--green);
}

.page-faq .faq-hero .breadcrumbs span[aria-current] {
  color: var(--on-dark);
}

.page-faq .faq-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 32px;
  padding-block: clamp(34px, 5vw, 62px) clamp(48px, 7vw, 88px);
}

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

.page-faq .faq-kicker {
  display: inline-block;
  margin: 0 0 20px;
  padding: 5px 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--green);
  border: 1px solid rgba(56, 248, 176, .45);
}

.page-faq .faq-hero h1 {
  margin: 0 0 20px;
  font-size: clamp(34px, 6vw, 76px);
  line-height: 1.04;
  letter-spacing: -.02em;
  font-weight: 900;
}

.page-faq .faq-mark-word {
  background: var(--magenta);
  color: var(--ink);
  padding: 0 .1em;
  -webkit-box-decoration-break: clone;
  box-decoration-break: clone;
}

.page-faq .faq-lede {
  max-width: 62ch;
  margin: 0;
  font-size: 16px;
  line-height: 1.78;
  color: var(--on-dark-mute);
}

.page-faq .faq-hero-side {
  min-width: 0;
  padding: 18px 20px 20px;
  background: var(--ink-2);
  border: var(--bd) solid rgba(244, 239, 230, .3);
  box-shadow: 5px 5px 0 rgba(255, 46, 147, .5);
}

.page-faq .faq-side-title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--amber);
}

.page-faq .faq-stat-list {
  margin: 0;
}

.page-faq .faq-stat-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 9px 0;
  border-bottom: 1px solid rgba(244, 239, 230, .14);
}

.page-faq .faq-stat-row:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-faq .faq-stat-row dt {
  font-size: 14px;
  color: var(--on-dark-mute);
}

.page-faq .faq-stat-row dd {
  margin: 0;
  font-size: 14px;
  color: var(--on-dark);
  text-align: right;
}

.page-faq .faq-mono {
  font-family: var(--font-mono);
  letter-spacing: .02em;
}

/* ---------- 主体两栏 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 52px);
  padding-block: clamp(36px, 5vw, 76px) clamp(44px, 6vw, 96px);
}

/* ---------- 左侧索引 ---------- */
.page-faq .faq-index {
  align-self: start;
  border: var(--bd) solid var(--brown);
  background: var(--paper-2);
  box-shadow: var(--shadow-1);
  overflow: hidden;
}

.page-faq .faq-index-head {
  margin: 0;
  padding: 12px 16px;
  background: var(--brown);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
}

.page-faq .faq-index-list {
  list-style: none;
  margin: 0;
  padding: 10px;
  display: grid;
  gap: 6px;
}

.page-faq .faq-index-link {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  align-items: center;
  gap: 10px;
  padding: 9px 10px;
  border: 1px solid transparent;
  color: var(--on-light);
  font-size: 15px;
  text-decoration: none;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease),
    border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-faq .faq-index-num {
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.2;
  text-align: center;
  color: var(--amber);
  border: 1px solid var(--amber);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .faq-index-link:hover,
.page-faq .faq-index-link:focus-visible {
  background: var(--spectrum);
  color: var(--ink);
  border-color: var(--brown);
  transform: translateX(2px);
}

.page-faq .faq-index-link:hover .faq-index-num,
.page-faq .faq-index-link:focus-visible .faq-index-num {
  color: var(--ink);
  border-color: var(--ink);
}

.page-faq .faq-index-link:focus-visible {
  outline: 2px solid var(--magenta);
  outline-offset: 2px;
}

.page-faq .faq-index-art {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border-top: 2px solid var(--brown);
  object-fit: cover;
}

/* ---------- 问答流 ---------- */
.page-faq .faq-stream {
  display: grid;
  gap: clamp(34px, 4vw, 56px);
  min-width: 0;
}

.page-faq .faq-group {
  scroll-margin-top: 96px;
}

.page-faq .faq-group:nth-of-type(1) { --faq-accent: var(--magenta); }
.page-faq .faq-group:nth-of-type(2) { --faq-accent: var(--blue); }
.page-faq .faq-group:nth-of-type(3) { --faq-accent: var(--green); }
.page-faq .faq-group:nth-of-type(4) { --faq-accent: var(--amber); }
.page-faq .faq-group:nth-of-type(5) { --faq-accent: var(--violet); }
.page-faq .faq-group:nth-of-type(6) { --faq-accent: var(--magenta); }

.page-faq .faq-group-title {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin: 0 0 18px;
  padding-bottom: 12px;
  border-bottom: 3px solid var(--brown);
  font-size: clamp(22px, 2.6vw, 30px);
  font-weight: 900;
  letter-spacing: -.01em;
  line-height: 1.2;
}

.page-faq .faq-group-title::before {
  content: "";
  flex: none;
  width: 14px;
  height: 14px;
  background: var(--faq-accent);
  transform: translateY(-2px);
}

.page-faq .faq-group-count {
  margin-left: auto;
  flex: none;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: .04em;
  color: var(--on-light-mute);
}

.page-faq .qa-item {
  margin-bottom: 12px;
  border: var(--bd) solid var(--brown);
  background: var(--paper-2);
  box-shadow: var(--shadow-1);
  transition: box-shadow var(--dur) var(--ease), transform var(--dur) var(--ease),
    border-left-width var(--dur) var(--ease);
}

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

.page-faq .qa-item:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-2);
}

.page-faq .qa-item[open] {
  border-left: 6px solid var(--faq-accent);
}

.page-faq .qa-q {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr) 20px;
  align-items: center;
  gap: 12px;
  padding: 15px 16px;
  cursor: pointer;
  list-style: none;
  font-size: clamp(16px, 1.7vw, 19px);
  font-weight: 700;
  line-height: 1.5;
  color: var(--on-light);
}

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

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

.page-faq .qa-q:focus-visible {
  outline: 2px solid var(--magenta);
  outline-offset: -4px;
}

.page-faq .qa-num {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  line-height: 1.3;
  text-align: center;
  padding: 2px 0;
  color: var(--faq-accent);
  border: 1px solid var(--faq-accent);
}

.page-faq .qa-text {
  min-width: 0;
}

.page-faq .qa-mark {
  position: relative;
  width: 18px;
  height: 18px;
  border: 2px solid var(--brown);
  background: var(--paper-2);
  transition: background var(--dur-2) var(--ease);
}

.page-faq .qa-mark::before,
.page-faq .qa-mark::after {
  content: "";
  position: absolute;
  left: 3px;
  right: 3px;
  top: 50%;
  height: 2px;
  background: var(--brown);
  transform: translateY(-50%);
}

.page-faq .qa-mark::after {
  transform: translateY(-50%) rotate(90deg);
  transition: transform var(--dur-2) var(--ease);
}

.page-faq .qa-item[open] .qa-mark {
  background: var(--faq-accent);
}

.page-faq .qa-item[open] .qa-mark::after {
  transform: translateY(-50%) rotate(0deg);
}

.page-faq .qa-a {
  padding: 0 18px 18px;
  border-top: 1px solid var(--hair-light);
}

.page-faq .qa-a p {
  margin: 14px 0 0;
  max-width: 70ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--on-light-mute);
}

.page-faq .qa-a strong {
  font-family: var(--font-mono);
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--on-light);
}

.page-faq .qa-ref {
  font-size: 14px;
}

.page-faq .qa-ref a {
  color: var(--blue);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-faq .qa-ref a:hover,
.page-faq .qa-ref a:focus-visible {
  color: var(--magenta);
  border-bottom-color: var(--magenta);
}

/* ---------- 口径说明区 ---------- */
.page-faq .faq-metrics {
  position: relative;
  padding-block: clamp(44px, 6vw, 88px);
  background-color: var(--ink-2);
  background-image: var(--scan);
  color: var(--on-dark);
}

.page-faq .faq-metrics::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--spectrum);
}

.page-faq .faq-metrics-head {
  max-width: 68ch;
  margin-bottom: clamp(24px, 3vw, 40px);
}

.page-faq .faq-metrics-head h2 {
  margin: 0 0 14px;
  font-size: clamp(26px, 3.4vw, 40px);
  font-weight: 900;
  line-height: 1.12;
  letter-spacing: -.015em;
}

.page-faq .faq-metrics-lede {
  margin: 0;
  font-size: 16px;
  line-height: 1.78;
  color: var(--on-dark-mute);
}

.page-faq .faq-chart-figure {
  margin: 0 0 clamp(22px, 3vw, 34px);
  padding: clamp(14px, 2vw, 24px);
  border: 2px solid var(--violet);
  background: rgba(244, 239, 230, .04);
}

.page-faq .faq-chart {
  display: block;
  width: 100%;
  max-width: 620px;
  height: auto;
  margin: 0 auto;
}

.page-faq .faq-chart text {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  fill: var(--on-dark-mute);
}

.page-faq .faq-chart-grid line {
  stroke: rgba(244, 239, 230, .16);
  stroke-width: 1;
}

.page-faq .faq-chart-line {
  stroke: var(--magenta);
  stroke-width: 2.5;
}

.page-faq .faq-chart-dot {
  fill: var(--green);
  stroke: var(--ink);
  stroke-width: 2;
}

.page-faq .faq-metrics-art {
  display: block;
  width: 100%;
  max-width: 720px;
  height: auto;
  margin: 0 0 clamp(22px, 3vw, 34px);
  border: 2px solid rgba(244, 239, 230, .24);
}

.page-faq .faq-table-shell {
  background: var(--paper-2);
  border: var(--bd) solid var(--brown);
  box-shadow: 7px 7px 0 var(--magenta);
}

.page-faq .faq-table-shell .data-table {
  width: 100%;
  margin: 0;
  border-collapse: collapse;
  font-size: 14px;
}

.page-faq .faq-table-shell .data-table th,
.page-faq .faq-table-shell .data-table td {
  padding: 12px 14px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--hair-light);
}

.page-faq .faq-table-shell .data-table thead th {
  background: var(--brown);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  font-weight: 500;
  white-space: nowrap;
}

.page-faq .faq-table-shell .data-table tbody tr:nth-child(even) {
  background: rgba(30, 26, 23, .035);
}

.page-faq .faq-table-shell .data-table tbody tr:hover {
  background: rgba(255, 46, 147, .08);
}

.page-faq .faq-table-shell .data-table tbody th {
  font-weight: 700;
  color: var(--on-light);
  white-space: nowrap;
}

.page-faq .faq-table-shell .data-table strong {
  font-family: var(--font-mono);
  letter-spacing: .02em;
}

.page-faq .faq-table-shell .data-table a {
  color: var(--blue);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.page-faq .faq-table-shell .data-table a:hover {
  border-bottom-color: var(--magenta);
  color: var(--magenta);
}

.page-faq .term {
  position: relative;
  border-bottom: 1px dashed var(--violet);
  cursor: help;
}

.page-faq .term::after {
  content: attr(data-tip);
  position: absolute;
  left: 0;
  bottom: calc(100% + 8px);
  z-index: 4;
  width: max-content;
  max-width: 260px;
  padding: 8px 10px;
  background: var(--ink);
  color: var(--paper);
  border: 1px solid var(--green);
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 400;
  line-height: 1.55;
  letter-spacing: 0;
  white-space: normal;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--dur-2) var(--ease);
}

.page-faq .term:hover::after,
.page-faq .term:focus-visible::after {
  opacity: 1;
  visibility: visible;
}

.page-faq .term:focus-visible {
  outline: 2px solid var(--magenta);
  outline-offset: 2px;
}

/* ---------- 兜底联系区 ---------- */
.page-faq .faq-escalate {
  position: relative;
  padding-block: clamp(44px, 6vw, 88px);
  background-color: var(--ink);
  background-image: var(--scan);
  color: var(--on-dark);
}

.page-faq .faq-escalate::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--spectrum);
}

.page-faq .faq-escalate-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 56px);
  align-items: start;
}

.page-faq .faq-escalate-main h2 {
  margin: 0 0 16px;
  font-size: clamp(26px, 3.4vw, 38px);
  font-weight: 900;
  line-height: 1.14;
  letter-spacing: -.015em;
}

.page-faq .faq-escalate-main p {
  max-width: 62ch;
  margin: 0;
  font-size: 16px;
  line-height: 1.78;
  color: var(--on-dark-mute);
}

.page-faq .faq-escalate-links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 26px;
}

.page-faq .faq-escalate .btn--ghost {
  color: var(--on-dark);
  border-color: var(--on-dark);
  box-shadow: 4px 4px 0 var(--blue);
}

.page-faq .faq-contact-list {
  margin: 0;
  border: 2px solid rgba(244, 239, 230, .22);
  background: var(--ink-2);
}

.page-faq .faq-contact-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 4px;
  padding: 14px 18px;
  border-bottom: 1px solid rgba(244, 239, 230, .14);
}

.page-faq .faq-contact-row:last-child {
  border-bottom: 0;
}

.page-faq .faq-contact-row dt {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--amber);
}

.page-faq .faq-contact-row dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.65;
  color: var(--on-dark);
  word-break: break-word;
}

.page-faq .faq-contact-row--note dd {
  font-size: 14px;
  color: var(--on-dark-mute);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-contact-row {
    grid-template-columns: 118px minmax(0, 1fr);
    gap: 14px;
    align-items: baseline;
  }

  .page-faq .qa-q {
    grid-template-columns: 46px minmax(0, 1fr) 22px;
    padding: 17px 20px;
  }

  .page-faq .qa-a {
    padding: 0 22px 22px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 3fr);
    gap: clamp(32px, 5vw, 80px);
    align-items: end;
  }

  .page-faq .faq-escalate-grid {
    grid-template-columns: minmax(0, 3fr) minmax(0, 2fr);
    gap: clamp(32px, 5vw, 72px);
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
    gap: clamp(32px, 4vw, 60px);
    align-items: start;
  }

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