.page-certification {
  --cert-mark: 15px;
  --cert-rail: 6px;
  --cert-node-gap: var(--space-6);
}

/* ---------- 首屏 ---------- */
.page-certification .cert-hero {
  padding-top: var(--space-3);
  padding-bottom: var(--space-6);
}

.page-certification .cert-hero__frame {
  position: relative;
  border: var(--border-thick) solid var(--color-ink);
  padding: clamp(var(--space-4), 5vw, var(--space-8)) clamp(var(--space-2), 4vw, var(--space-6)) clamp(var(--space-4), 5vw, var(--space-6));
  background: var(--color-surface);
}

.page-certification .cert-hero__frame::before {
  content: "";
  position: absolute;
  inset: 3px;
  border: var(--border-thin) solid var(--color-ink);
  pointer-events: none;
}

.page-certification .cert-hero__kicker {
  margin: 0 0 var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.3em;
  text-align: center;
  color: var(--color-ink-muted);
}

.page-certification .cert-hero__title {
  margin: 0 0 var(--space-3);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-display);
  line-height: var(--leading-heading);
  letter-spacing: 0.16em;
  text-indent: 0.16em;
  text-align: center;
  color: var(--color-ink);
}

.page-certification .cert-hero__lede {
  max-width: 58ch;
  margin: 0 auto var(--space-6);
  font-size: var(--text-lg);
  line-height: var(--leading-body);
  text-align: center;
  color: var(--color-ink-soft);
}

/* ---------- 阶段横轴 ---------- */
.page-certification .cert-axis {
  position: relative;
  padding: var(--space-2) 0;
}

.page-certification .cert-axis__list {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-2) var(--space-3);
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-certification .cert-axis__item {
  flex: 0 1 auto;
}

.page-certification .cert-axis__link {
  display: inline-flex;
  flex-direction: column;
  gap: 2px;
  padding: var(--space-1) var(--space-3);
  border: var(--border-thin) solid var(--color-ink);
  background: var(--color-surface);
  font-family: var(--font-heading);
  text-decoration: none;
  color: var(--color-ink);
  transition: border-color 0.18s ease, transform 0.18s ease, background-color 0.18s ease;
}

.page-certification .cert-axis__link:hover,
.page-certification .cert-axis__link:focus-visible {
  border-color: var(--color-accent);
  background: var(--color-highlight);
  transform: translateY(-2px);
}

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

.page-certification .cert-axis__name {
  font-size: var(--text-lg);
  letter-spacing: 0.14em;
}

@media (min-width: 641px) {
  .page-certification .cert-axis__list {
    justify-content: space-between;
  }

  .page-certification .cert-axis::before {
    content: "";
    position: absolute;
    left: var(--space-4);
    right: var(--space-4);
    top: 50%;
    border-top: var(--border-thin) dotted var(--color-ink-muted);
    z-index: 0;
  }
}

/* ---------- 首屏错位数字 ---------- */
.page-certification .cert-figures {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: flex-end;
  gap: var(--space-3) var(--space-6);
  margin-top: var(--space-6);
  padding-top: var(--space-4);
  border-top: var(--border-thin) dotted var(--color-line);
}

.page-certification .cert-figure {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
}

.page-certification .cert-figure__value {
  font-family: var(--font-mono);
  font-size: var(--text-figure);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--color-ink);
}

.page-certification .cert-figure__label {
  font-size: var(--text-xs);
  letter-spacing: 0.18em;
  color: var(--color-ink-muted);
}

@media (min-width: 901px) {
  .page-certification .cert-figures {
    justify-content: flex-end;
    padding-right: var(--space-4);
  }

  .page-certification .cert-figure:nth-child(1) {
    margin-bottom: var(--space-4);
  }

  .page-certification .cert-figure:nth-child(2) {
    margin-bottom: 0;
  }

  .page-certification .cert-figure:nth-child(3) {
    margin-bottom: var(--space-6);
  }
}

/* ---------- 阶段区块 ---------- */
.page-certification .cert-stage {
  padding-top: var(--space-6);
  padding-bottom: var(--space-6);
}

.page-certification .cert-stage + .cert-stage {
  border-top: var(--border-thin) dotted var(--color-line);
}

.page-certification .cert-stage__head {
  max-width: 62ch;
  margin: 0 auto var(--space-6);
  text-align: center;
}

.page-certification .cert-stage__kicker {
  margin: 0 0 var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.28em;
  color: var(--color-accent);
}

.page-certification .cert-stage__title {
  margin: 0 0 var(--space-3);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-3xl);
  line-height: var(--leading-heading);
  letter-spacing: 0.08em;
  color: var(--color-ink);
}

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

/* ---------- 图版 ---------- */
.page-certification .cert-plate {
  margin: 0 auto var(--space-6);
  max-width: 100%;
}

.page-certification .cert-plate__media {
  padding: var(--cert-rail);
  border: var(--border-thick) solid var(--color-ink);
  background: var(--color-surface-deep);
}

.page-certification .cert-plate__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border: var(--border-thin) solid var(--color-line);
}

.page-certification .cert-plate__media--wide img {
  aspect-ratio: 21 / 9;
}

.page-certification .cert-plate__caption {
  margin-top: var(--space-2);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-muted);
}

@media (min-width: 901px) {
  .page-certification .cert-plate--narrow {
    max-width: 62%;
    margin-left: auto;
    margin-right: 0;
  }
}

/* ---------- 时间线 ---------- */
.page-certification .cert-timeline {
  position: relative;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-certification .cert-timeline::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: calc(var(--cert-mark) / 2 - 1px);
  border-left: var(--border-thin) dotted var(--color-line);
}

.page-certification .cert-node {
  position: relative;
  padding-left: calc(var(--cert-mark) + var(--space-3));
  padding-bottom: var(--space-4);
}

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

.page-certification .cert-node__mark {
  position: absolute;
  top: 5px;
  left: 0;
  width: var(--cert-mark);
  height: var(--cert-mark);
  background: var(--color-surface);
  border: var(--border-thin) solid var(--color-ink);
  transition: background-color 0.18s ease, border-color 0.18s ease;
}

.page-certification .cert-node__body {
  position: relative;
  padding: var(--space-3);
  border: var(--border-thin) solid var(--color-line);
  background: var(--color-surface);
  transition: border-color 0.18s ease, background-color 0.18s ease;
}

.page-certification .cert-node__body:hover,
.page-certification .cert-node__body:focus-visible,
.page-certification .cert-node__body:focus-within {
  border-color: var(--color-accent);
  outline: none;
}

.page-certification .cert-node__body:focus-visible {
  box-shadow: 0 0 0 2px var(--color-focus);
}

.page-certification .cert-node:hover .cert-node__mark {
  background: var(--color-accent);
  border-color: var(--color-accent);
}

.page-certification .cert-node__step {
  display: inline-block;
  margin-bottom: 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-node__title {
  margin: 0 0 var(--space-2);
  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-node__text {
  margin: 0;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-certification .cert-node__change {
  margin: var(--space-2) 0 0;
  padding-top: var(--space-2);
  border-top: var(--border-thin) dotted var(--color-line);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-muted);
}

.page-certification .cert-node__change b {
  margin-right: var(--space-1);
  font-family: var(--font-mono);
  font-weight: 400;
  font-size: var(--text-xs);
  letter-spacing: 0.16em;
  color: var(--color-primary);
}

.page-certification .cert-node__change a {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-certification .cert-node__change a:hover,
.page-certification .cert-node__change a:focus-visible {
  color: var(--color-focus);
}

@media (min-width: 901px) {
  .page-certification .cert-timeline::before {
    left: 50%;
    margin-left: -1px;
  }

  .page-certification .cert-node {
    width: calc(50% - var(--space-4));
    padding-left: 0;
    padding-bottom: var(--space-4);
  }

  .page-certification .cert-node:nth-child(odd) {
    margin-right: auto;
    padding-right: var(--space-2);
  }

  .page-certification .cert-node:nth-child(odd) .cert-node__mark {
    left: auto;
    right: calc(-1 * var(--space-4) - calc(var(--cert-mark) / 2) + 1px);
  }

  .page-certification .cert-node:nth-child(even) {
    margin-left: auto;
    padding-left: var(--space-2);
  }

  .page-certification .cert-node:nth-child(even) .cert-node__mark {
    left: calc(-1 * var(--space-4) - calc(var(--cert-mark) / 2) + 1px);
  }
}

/* ---------- 标准清单 ---------- */
.page-certification .cert-ledger-section {
  padding-top: var(--space-6);
  padding-bottom: var(--space-6);
  border-top: var(--border-thin) dotted var(--color-line);
}

.page-certification .cert-ledger {
  border: var(--border-thick) solid var(--color-ink);
  background: var(--color-surface);
  overflow-x: auto;
}

.page-certification .cert-ledger table {
  width: 100%;
  min-width: 620px;
  border-collapse: collapse;
  font-size: var(--text-base);
}

.page-certification .cert-ledger thead th {
  padding: var(--space-2) var(--space-3);
  background: var(--color-primary-soft);
  border-bottom: var(--border-thick) solid var(--color-ink);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-sm);
  letter-spacing: 0.14em;
  text-align: left;
  color: var(--color-ink);
}

.page-certification .cert-ledger tbody th,
.page-certification .cert-ledger tbody td {
  padding: var(--space-2) var(--space-3);
  border-top: var(--border-thin) dotted var(--color-line);
  text-align: left;
  vertical-align: top;
  font-weight: var(--weight-body);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-certification .cert-ledger tbody th {
  font-family: var(--font-heading);
  color: var(--color-ink);
}

.page-certification .cert-ledger tbody tr:first-child th,
.page-certification .cert-ledger tbody tr:first-child td {
  border-top: none;
}

.page-certification .cert-ledger tbody tr {
  transition: background-color 0.16s ease;
}

.page-certification .cert-ledger tbody tr:hover {
  background: var(--color-highlight);
}

.page-certification .cert-status {
  display: inline-block;
  padding: 2px var(--space-1);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  white-space: nowrap;
}

.page-certification .cert-status--on {
  background: var(--color-primary);
  color: var(--color-primary-ink);
}

.page-certification .cert-status--watch {
  background: transparent;
  border: var(--border-thin) solid var(--color-accent);
  color: var(--color-accent);
}

/* ---------- 行动出口 ---------- */
.page-certification .cert-action {
  padding-top: var(--space-6);
  padding-bottom: var(--space-8);
}

.page-certification .cert-action__frame {
  position: relative;
  padding: clamp(var(--space-4), 5vw, var(--space-8)) clamp(var(--space-2), 4vw, var(--space-6));
  border: var(--border-thick) solid var(--color-ink);
  background: var(--color-surface-alt);
  text-align: center;
}

.page-certification .cert-action__frame::before {
  content: "";
  position: absolute;
  inset: 3px;
  border: var(--border-thin) solid var(--color-ink);
  pointer-events: none;
}

.page-certification .cert-action__kicker {
  margin: 0 0 var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.3em;
  color: var(--color-ink-muted);
}

.page-certification .cert-action__title {
  margin: 0 0 var(--space-3);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-3xl);
  line-height: var(--leading-heading);
  letter-spacing: 0.08em;
  color: var(--color-ink);
}

.page-certification .cert-action__text {
  max-width: 56ch;
  margin: 0 auto var(--space-4);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-certification .cert-action__links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
}

.page-certification .cert-action__note {
  margin: 0;
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-muted);
}

.page-certification .cert-action__note a {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-certification .cert-action__note a:hover,
.page-certification .cert-action__note a:focus-visible {
  color: var(--color-focus);
}