.page-faq {
  --faq-rail: 232px;
  --faq-gap: clamp(28px, 4vw, 48px);
  background: var(--ink);
  color: var(--text);
}

.page-faq [data-accent="cyan"] { --card-accent: var(--cyan); }
.page-faq [data-accent="amber"] { --card-accent: var(--amber); }
.page-faq [data-accent="violet"] { --card-accent: var(--violet); }
.page-faq [data-accent="forest"] { --card-accent: var(--forest); }
.page-faq [data-accent="wine"] { --card-accent: var(--wine); }

/* 面包屑 */
.page-faq .faq-crumb-wrap {
  padding-top: 20px;
  padding-bottom: 4px;
}

.page-faq .breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-faq .breadcrumb-list > li + li::before {
  content: "/";
  margin: 0 9px;
  color: var(--line);
}

.page-faq .breadcrumb-link {
  color: var(--muted);
  text-decoration: none;
  transition: color var(--dur) var(--ease);
}

.page-faq .breadcrumb-link:hover,
.page-faq .breadcrumb-link:focus-visible {
  color: var(--cyan);
}

.page-faq .breadcrumb-current {
  color: var(--text);
}

/* 首屏 */
.page-faq .faq-hero {
  padding-top: clamp(24px, 4vw, 50px);
  padding-bottom: clamp(30px, 4.5vw, 56px);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-hero-grid {
  display: grid;
  gap: clamp(26px, 4vw, 44px);
  align-items: start;
}

.page-faq .faq-kicker {
  margin: 0 0 18px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-faq .faq-h1 {
  margin: 0 0 20px;
  font-family: var(--mono);
  font-weight: 600;
  font-size: clamp(1.7rem, 5.4vw, 3rem);
  line-height: 1.18;
  letter-spacing: -0.015em;
}

.page-faq .faq-lede {
  margin: 0 0 26px;
  max-width: 62ch;
  color: var(--muted);
  font-size: 16.5px;
  line-height: 1.75;
}

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

.page-faq .faq-quick {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-faq .faq-quick-item {
  display: block;
  padding: 16px 18px 18px;
  background: var(--panel-deep);
  color: inherit;
  text-decoration: none;
  border-top: 2px solid transparent;
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .faq-quick-item:hover {
  background: var(--panel);
  border-top-color: var(--cyan);
}

.page-faq .faq-quick-code {
  display: block;
  margin: 0 0 8px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--cyan);
}

.page-faq .faq-quick-title {
  display: block;
  margin: 0 0 6px;
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.5;
}

.page-faq .faq-quick-text {
  display: block;
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
}

/* 布局 */
.page-faq .faq-layout {
  display: grid;
  gap: var(--faq-gap);
  padding-top: clamp(32px, 5vw, 62px);
  padding-bottom: clamp(46px, 6vw, 88px);
}

.page-faq .faq-rail {
  padding: 18px 18px 20px;
  border: 1px solid var(--line);
  background: var(--panel-deep);
}

.page-faq .faq-rail-title {
  margin: 0 0 14px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-faq .faq-rail-list {
  display: grid;
  gap: 1px;
  margin: 0 0 16px;
  padding: 0;
  list-style: none;
  background: var(--line);
}

.page-faq .faq-rail-list a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 11px 12px;
  background: var(--panel-deep);
  color: var(--text);
  text-decoration: none;
  font-size: 14px;
  line-height: 1.45;
  border-left: 2px solid transparent;
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .faq-rail-list a:hover,
.page-faq .faq-rail-list a:focus-visible {
  background: var(--panel);
  border-left-color: var(--cyan);
}

.page-faq .faq-rail-code {
  flex: none;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--cyan);
}

.page-faq .faq-rail-note {
  margin: 0;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--muted);
}

.page-faq .faq-body {
  display: grid;
  gap: clamp(38px, 5vw, 66px);
  min-width: 0;
}

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

.page-faq .faq-sec-head {
  position: relative;
  margin: 0 0 26px;
  padding-top: 22px;
}

.page-faq .faq-sec-head::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 52px;
  height: 2px;
  background: var(--cyan);
}

.page-faq .faq-sec-head .section-code {
  margin: 0 0 12px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-faq .faq-sec-title {
  margin: 0 0 12px;
  font-family: var(--mono);
  font-weight: 600;
  font-size: clamp(1.22rem, 2.8vw, 1.75rem);
  line-height: 1.32;
  letter-spacing: -0.01em;
}

.page-faq .faq-sec-lede {
  margin: 0;
  max-width: 68ch;
  color: var(--muted);
  font-size: 15.5px;
  line-height: 1.75;
}

/* 五个系列 */
.page-faq .faq-series {
  display: grid;
  gap: 1px;
  margin: 0 0 26px;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-faq .faq-series-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 16px;
  padding: 20px;
  background: var(--panel-deep);
  border-left: 2px solid var(--card-accent, var(--cyan));
  transition: background var(--dur) var(--ease);
}

.page-faq .faq-series-item:hover {
  background: var(--panel);
}

.page-faq .faq-series-code {
  font-family: var(--mono);
  font-size: 20px;
  line-height: 1;
  letter-spacing: 0.04em;
  color: var(--card-accent, var(--cyan));
}

.page-faq .faq-series-name {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 600;
  line-height: 1.45;
}

.page-faq .faq-series-desc {
  margin: 0 0 10px;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--muted);
}

.page-faq .faq-series-when {
  margin: 0;
  padding-left: 12px;
  border-left: 1px solid var(--line);
  font-size: 13px;
  line-height: 1.65;
  color: var(--muted);
}

.page-faq .faq-figure {
  margin: 26px 0 0;
}

/* 四步配置 */
.page-faq .faq-steps {
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-faq .faq-step {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 16px;
  padding: 20px;
  background: var(--panel-deep);
  transition: background var(--dur) var(--ease);
}

.page-faq .faq-step:hover,
.page-faq .faq-step:focus-within {
  background: var(--panel);
}

.page-faq .faq-step-num {
  font-family: var(--mono);
  font-size: 24px;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--cyan);
}

.page-faq .faq-step-title {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 600;
  line-height: 1.45;
}

.page-faq .faq-step-text {
  margin: 0 0 12px;
  font-size: 14.5px;
  line-height: 1.72;
}

.page-faq .faq-step-tip {
  margin: 0;
  padding-top: 11px;
  border-top: 1px dashed var(--line);
  font-size: 13px;
  line-height: 1.65;
  color: var(--muted);
}

.page-faq .faq-tip-label {
  margin-right: 8px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--amber);
}

/* 按编号定位 */
.page-faq .faq-lookup-grid {
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-faq .faq-lookup-card {
  padding: 20px;
  background: var(--panel-deep);
  border-top: 2px solid var(--card-accent, var(--cyan));
  transition: background var(--dur) var(--ease);
}

.page-faq .faq-lookup-card:hover {
  background: var(--panel);
}

.page-faq .faq-lookup-title {
  margin: 0 0 10px;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.45;
}

.page-faq .faq-lookup-text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--muted);
}

.page-faq .faq-code-chip {
  display: inline-block;
  padding: 1px 6px;
  border: 1px solid var(--line);
  background: var(--panel);
  font-family: var(--mono);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--cyan);
  white-space: nowrap;
}

.page-faq .faq-note {
  margin: 20px 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--violet);
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--muted);
}

/* 常见报错 */
.page-faq .faq-errors {
  display: grid;
  gap: 10px;
}

.page-faq .faq-err {
  background: var(--panel-deep);
  border: 1px solid var(--line);
  border-top: 2px solid var(--amber);
  transition: background var(--dur) var(--ease);
}

.page-faq .faq-err:hover {
  background: var(--panel);
}

.page-faq .faq-err-sum {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 15px 18px;
  cursor: pointer;
  list-style: none;
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.5;
}

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

.page-faq .faq-err-code {
  flex: none;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--amber);
}

.page-faq .faq-err-name {
  flex: 1 1 auto;
  min-width: 0;
}

.page-faq .faq-err-caret {
  position: relative;
  flex: none;
  align-self: center;
  width: 10px;
  height: 10px;
}

.page-faq .faq-err-caret::before,
.page-faq .faq-err-caret::after {
  content: "";
  position: absolute;
  background: var(--muted);
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}

.page-faq .faq-err-caret::before {
  top: 4px;
  left: 0;
  width: 10px;
  height: 1px;
}

.page-faq .faq-err-caret::after {
  top: 0;
  left: 4px;
  width: 1px;
  height: 10px;
}

.page-faq .faq-err[open] .faq-err-caret::after {
  transform: scaleY(0);
  opacity: 0;
}

.page-faq .faq-err-body {
  padding: 0 18px 18px;
}

.page-faq .faq-err-dl {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 9px 14px;
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
}

.page-faq .faq-err-dl dt {
  padding-top: 4px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--muted);
  white-space: nowrap;
}

.page-faq .faq-err-dl dd {
  margin: 0;
  color: var(--text);
}

/* 提交纠错 */
.page-faq .faq-fix-steps {
  display: grid;
  gap: 0;
  margin: 0 0 20px;
  padding: 0;
  list-style: none;
}

.page-faq .faq-fix-steps li {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
  font-size: 15px;
  line-height: 1.75;
}

.page-faq .faq-fix-steps li:first-child {
  border-top: 1px solid var(--line);
}

.page-faq .faq-fix-steps p {
  margin: 0;
  min-width: 0;
}

.page-faq .faq-fix-code {
  padding-top: 3px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--cyan);
}

.page-faq .faq-fix-mail {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

/* 联系客服 */
.page-faq .faq-contact-grid {
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-faq .faq-contact-card {
  padding: 22px 20px;
  background: var(--panel-deep);
  border-top: 2px solid var(--card-accent, var(--cyan));
}

.page-faq .faq-contact-label {
  margin: 0 0 10px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-faq .faq-contact-value {
  margin: 0 0 12px;
  font-family: var(--mono);
  font-size: clamp(15px, 2.4vw, 18px);
  letter-spacing: 0.02em;
  color: var(--text);
  word-break: break-all;
}

.page-faq .faq-contact-text {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--muted);
}

.page-faq .faq-cta {
  display: grid;
  gap: 18px;
  margin-top: clamp(32px, 5vw, 54px);
  padding: clamp(22px, 3.5vw, 34px);
  border: 1px solid var(--line);
  background: var(--panel);
}

.page-faq .faq-cta-title {
  margin: 0 0 8px;
  font-family: var(--mono);
  font-size: clamp(1.05rem, 2vw, 1.3rem);
  font-weight: 600;
  line-height: 1.4;
}

.page-faq .faq-cta-text {
  margin: 0;
  max-width: 60ch;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--muted);
}

/* 断点 */
@media (min-width: 560px) {
  .page-faq .faq-quick {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (min-width: 720px) {
  .page-faq .faq-lookup-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

@media (min-width: 760px) {
  .page-faq .faq-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero-grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
    gap: clamp(32px, 4vw, 64px);
  }

  .page-faq .faq-rail {
    position: sticky;
    top: 92px;
    align-self: start;
  }

  .page-faq .faq-rail-list {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-quick-item,
  .page-faq .faq-rail-list a,
  .page-faq .faq-series-item,
  .page-faq .faq-step,
  .page-faq .faq-lookup-card,
  .page-faq .faq-err,
  .page-faq .faq-err-caret::before,
  .page-faq .faq-err-caret::after,
  .page-faq .breadcrumb-link {
    transition: none;
  }
}