.page-certification {
  --cert-node-offset: calc(var(--space-4) + 4px);
  --cert-rule: 2px;
}

/* ============ 首屏 ============ */
.page-certification .cert-hero {
  position: relative;
  overflow: hidden;
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  padding-block: var(--space-8) var(--space-8);
}

.page-certification .cert-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(to right, var(--color-contrast-line) 1px, transparent 1px);
  background-size: 12.5% 100%;
  opacity: 0.4;
  pointer-events: none;
}

.page-certification .cert-hero__inner {
  position: relative;
  z-index: 1;
}

.page-certification .cert-hero__crumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-1);
  margin-bottom: var(--space-6);
  font-size: var(--text-sm);
  letter-spacing: 0.04em;
  color: var(--color-contrast-ink);
  opacity: 0.72;
}

.page-certification .cert-hero__crumb a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 140ms ease;
}

.page-certification .cert-hero__crumb a:hover,
.page-certification .cert-hero__crumb a:focus-visible {
  border-bottom-color: var(--color-contrast-accent);
}

.page-certification .cert-hero__eyebrow {
  color: var(--color-contrast-accent);
  margin: 0 0 var(--space-3);
}

.page-certification .cert-hero__title {
  margin: 0;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-display);
  line-height: 1.02;
  letter-spacing: 0.01em;
  color: var(--color-contrast-ink);
  text-wrap: balance;
}

.page-certification .cert-hero__body {
  display: grid;
  gap: var(--space-6);
  margin-top: var(--space-6);
}

.page-certification .cert-hero__figures {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-3);
}

.page-certification .cert-figure {
  border-top: 2px solid var(--color-contrast-accent);
  padding-top: var(--space-2);
  min-width: 0;
}

.page-certification .cert-figure__value {
  margin: 0 0 var(--space-1);
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  font-size: var(--text-figure);
  line-height: 1;
  color: var(--color-contrast-ink);
}

.page-certification .cert-figure__label {
  margin: 0;
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  color: var(--color-contrast-ink);
  opacity: 0.66;
}

.page-certification .cert-hero__lede {
  margin: 0;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-contrast-ink);
  opacity: 0.88;
}

/* 首屏横向时间轴带 */
.page-certification .cert-axis {
  margin-top: var(--space-8);
  padding-top: var(--space-4);
  border-top: var(--cert-rule) solid var(--color-contrast-line);
}

.page-certification .cert-axis__caption {
  margin: 0 0 var(--space-4);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-contrast-accent);
}

.page-certification .cert-axis__track {
  position: relative;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-2);
  padding-top: var(--space-1);
}

.page-certification .cert-axis__track::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 9px;
  height: var(--cert-rule);
  background: linear-gradient(90deg, var(--color-contrast-accent) 0%, var(--color-contrast-line) 78%, transparent 100%);
}

.page-certification .cert-axis__node {
  display: grid;
  justify-items: start;
  gap: var(--space-2);
  min-width: 0;
}

.page-certification .cert-axis__dot {
  width: 12px;
  height: 12px;
  border-radius: var(--radius-pill);
  background: var(--color-contrast-surface);
  border: 2px solid var(--color-contrast-accent);
  box-sizing: border-box;
}

.page-certification .cert-axis__label {
  font-size: var(--text-sm);
  line-height: 1.4;
  letter-spacing: 0.04em;
  color: var(--color-contrast-ink);
  opacity: 0.86;
}

.page-certification .cert-axis__note {
  margin: var(--space-4) 0 0;
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  color: var(--color-contrast-ink);
  opacity: 0.56;
}

/* ============ 通栏总览图 ============ */
.page-certification .cert-band {
  background: var(--color-surface);
  padding-block: var(--space-8);
}

.page-certification .cert-band__figure {
  margin: 0;
}

.page-certification .cert-band__frame {
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.page-certification .cert-band .media-frame__caption {
  margin-top: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}

/* ============ 通用小标题组合 ============ */
.page-certification .cert-head {
  display: grid;
  gap: var(--space-2);
  max-width: 66ch;
  margin-bottom: var(--space-8);
}

.page-certification .cert-head__lede {
  margin: 0;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-certification .cert-subtitle {
  margin: 0 0 var(--space-3);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
  padding-left: var(--space-2);
  border-left: 3px solid var(--color-primary);
}

/* ============ 三条主线 ============ */
.page-certification .cert-line {
  display: grid;
  gap: var(--space-4);
  padding-block: var(--space-6);
  border-top: var(--cert-rule) solid var(--color-line);
}

.page-certification .cert-line + .cert-line {
  border-top-width: 1px;
}

.page-certification .cert-line__rail {
  display: grid;
  align-content: start;
  gap: var(--space-2);
}

.page-certification .cert-line__index {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-ink-muted);
}

.page-certification .cert-line__name {
  margin: 0;
  padding-left: var(--space-2);
  border-left: 3px solid var(--color-primary);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-xl);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}

.page-certification .cert-line__note {
  margin: 0;
  font-size: var(--text-sm);
  line-height: 1.75;
  color: var(--color-ink-soft);
}

.page-certification .cert-steps {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-certification .cert-step {
  position: relative;
  padding: var(--space-4) 0 var(--space-4) var(--space-6);
  border-left: 1px solid var(--color-line);
}

.page-certification .cert-step::before {
  content: "";
  position: absolute;
  left: 0;
  top: var(--cert-node-offset);
  margin-left: -5px;
  width: 9px;
  height: 9px;
  border-radius: var(--radius-pill);
  background: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-surface-alt);
}

.page-certification .cert-step:last-child {
  padding-bottom: 0;
}

.page-certification .cert-step__phase {
  margin: 0 0 var(--space-1);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.16em;
  color: var(--color-ink-muted);
}

.page-certification .cert-step__title {
  margin: 0 0 var(--space-1);
  font-family: var(--font-heading);
  font-weight: 500;
  font-size: var(--text-lg);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}

.page-certification .cert-step__desc {
  margin: 0 0 var(--space-2);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
  max-width: var(--measure);
}

.page-certification .cert-step__outcome {
  margin: 0;
  padding: var(--space-2) var(--space-3);
  background: var(--color-primary-soft);
  border-left: 2px solid var(--color-primary);
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  line-height: 1.78;
  color: var(--color-ink);
}

.page-certification .cert-step__outcome-label {
  display: block;
  margin-bottom: calc(var(--space-1) / 2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.16em;
  color: var(--color-ink-muted);
}

.page-certification .cert-step__scope {
  margin: var(--space-2) 0 0;
  padding-top: var(--space-1);
  border-top: 1px dashed var(--color-line);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.04em;
  color: var(--color-ink-muted);
  transition: color 140ms ease, border-color 140ms ease;
}

.page-certification .cert-step:hover .cert-step__scope,
.page-certification .cert-step:focus-within .cert-step__scope {
  color: var(--color-accent);
  border-top-color: var(--color-accent);
}

.page-certification .cert-line__figure {
  margin: var(--space-4) 0 0;
}

.page-certification .cert-line__figure .media-frame {
  border-radius: var(--radius-md);
  overflow: hidden;
}

.page-certification .cert-line__figure .media-frame__caption {
  margin-top: var(--space-2);
  font-size: var(--text-sm);
  line-height: 1.7;
  color: var(--color-ink-soft);
}

/* ============ 校对流程 ============ */
.page-certification .cert-review__figure {
  margin: 0 0 var(--space-6);
}

.page-certification .cert-review__figure .media-frame {
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.page-certification .cert-review__figure .media-frame__caption {
  margin-top: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}

.page-certification .cert-flow-row {
  display: grid;
  gap: var(--space-3);
}

.page-certification .cert-flow {
  position: relative;
  padding: var(--space-3);
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-top: 3px solid var(--color-primary);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-1);
}

.page-certification .cert-flow__head {
  display: grid;
  gap: calc(var(--space-1) / 2);
  padding-right: var(--space-4);
  position: relative;
  cursor: pointer;
  list-style: none;
}

.page-certification .cert-flow__head::-webkit-details-marker {
  display: none;
}

.page-certification .cert-flow__head::after {
  content: "+";
  position: absolute;
  right: 0;
  top: 0;
  font-family: var(--font-mono);
  font-size: var(--text-lg);
  line-height: 1;
  color: var(--color-primary);
}

.page-certification .cert-flow[open] .cert-flow__head::after {
  content: "−";
  color: var(--color-accent);
}

.page-certification .cert-flow__step {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-ink-muted);
}

.page-certification .cert-flow__name {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}

.page-certification .cert-flow__body {
  margin-top: var(--space-2);
  padding-top: var(--space-2);
  border-top: 1px solid var(--color-line);
  font-size: var(--text-sm);
  line-height: 1.8;
  color: var(--color-ink-soft);
}

.page-certification .cert-flow__body ul {
  margin: 0;
  padding-left: 1.1em;
  display: grid;
  gap: var(--space-1);
}

/* 纠错路径 */
.page-certification .cert-report {
  margin-top: var(--space-8);
  padding-top: var(--space-6);
  border-top: var(--cert-rule) solid var(--color-line);
}

.page-certification .cert-report__steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-3);
}

.page-certification .cert-report__steps li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: var(--space-3);
  align-items: baseline;
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--color-line);
}

.page-certification .cert-report__steps li:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-certification .cert-report__num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: var(--text-lg);
  font-weight: 700;
  line-height: 1;
  color: var(--color-primary);
}

.page-certification .cert-report__steps p {
  margin: 0;
  font-size: var(--text-base);
  line-height: 1.7;
  color: var(--color-ink);
}

.page-certification .cert-report__foot {
  margin: var(--space-4) 0 0;
  font-size: var(--text-sm);
  line-height: 1.8;
  color: var(--color-ink-soft);
}

/* ============ 备案与主体 ============ */
.page-certification .cert-filing__grid {
  display: grid;
  gap: var(--space-6);
}

.page-certification .cert-filing__text .prose {
  margin: 0 0 var(--space-3);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink);
}

.page-certification .cert-filing__text .prose:last-child {
  margin-bottom: 0;
}

.page-certification .cert-filing__facts {
  margin: 0;
  display: grid;
  gap: 0;
  border-top: var(--cert-rule) solid var(--color-ink);
}

.page-certification .cert-fact {
  display: grid;
  gap: calc(var(--space-1) / 2);
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--color-line);
}

.page-certification .cert-fact dt {
  font-size: var(--text-xs);
  letter-spacing: 0.16em;
  color: var(--color-ink-muted);
}

.page-certification .cert-fact dd {
  margin: 0;
  font-size: var(--text-base);
  line-height: 1.5;
  color: var(--color-ink);
  overflow-wrap: anywhere;
}

.page-certification .cert-fact dd.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
}

/* ============ 使用边界 ============ */
.page-certification .cert-boundary__grid {
  display: grid;
  gap: var(--space-6);
}

.page-certification .cert-boundary__text .prose {
  margin: 0 0 var(--space-3);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink);
}

.page-certification .cert-boundary__text .prose:last-child {
  margin-bottom: 0;
}

.page-certification .cert-boundary__links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: var(--cert-rule) solid var(--color-line);
}

.page-certification .cert-boundary__links li {
  display: grid;
  gap: calc(var(--space-1) / 2);
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--color-line);
}

.page-certification .cert-boundary__links span {
  font-size: var(--text-sm);
  line-height: 1.7;
  color: var(--color-ink-soft);
}

/* ============ 响应式 ============ */
@media (min-width: 720px) {
  .page-certification .cert-flow-row {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--space-4);
  }

  .page-certification .cert-flow:not(:last-child)::after {
    content: "";
    position: absolute;
    top: var(--space-4);
    right: calc(var(--space-4) * -1);
    width: var(--space-4);
    height: var(--cert-rule);
    background: var(--color-primary);
  }

  .page-certification .cert-report__steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-4) var(--space-6);
  }

  .page-certification .cert-report__steps li {
    padding-bottom: 0;
    border-bottom: 0;
  }
}

@media (min-width: 900px) {
  .page-certification .cert-hero {
    padding-block: var(--space-8) var(--space-8);
  }

  .page-certification .cert-hero__body {
    grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
    align-items: start;
    gap: var(--space-8);
  }

  .page-certification .cert-line {
    grid-template-columns: minmax(0, 3fr) minmax(0, 9fr);
    gap: var(--space-8);
  }

  .page-certification .cert-line__rail {
    position: sticky;
    top: var(--space-6);
  }

  .page-certification .cert-filing__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: var(--space-8);
    align-items: start;
  }

  .page-certification .cert-boundary__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: var(--space-8);
    align-items: start;
  }

  .page-certification .cert-review__figure {
    max-width: 780px;
  }
}

@media (min-width: 1080px) {
  .page-certification .cert-report__steps {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-certification .cert-flow-row {
    gap: var(--space-6);
  }

  .page-certification .cert-flow:not(:last-child)::after {
    right: calc(var(--space-6) * -1);
    width: var(--space-6);
  }
}

@media (max-width: 520px) {
  .page-certification .cert-hero__figures {
    grid-template-columns: minmax(0, 1fr);
    gap: var(--space-2);
  }

  .page-certification .cert-axis__track {
    grid-template-columns: minmax(0, 1fr);
    padding-top: 0;
    gap: var(--space-3);
  }

  .page-certification .cert-axis__track::before {
    top: 0;
    bottom: 0;
    right: auto;
    width: var(--cert-rule);
    height: auto;
    background: linear-gradient(180deg, var(--color-contrast-accent) 0%, var(--color-contrast-line) 80%, transparent 100%);
  }

  .page-certification .cert-axis__node {
    grid-template-columns: auto minmax(0, 1fr);
    align-items: center;
    gap: var(--space-2);
    padding-left: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-certification .cert-hero__crumb a,
  .page-certification .cert-step__scope {
    transition: none;
  }
}