.page-certification {
  --cert-toc-w: 208px;
  --cert-gutter-gap: var(--space-8);
  background: var(--color-surface);
}

/* ============ 首屏 ============ */
.page-certification .cert-hero {
  padding-top: calc(var(--space-8) * 2 + var(--space-2));
  padding-bottom: 0;
  background: var(--color-surface);
}

.page-certification .cert-hero .breadcrumb {
  margin-bottom: var(--space-6);
}

.page-certification .cert-hero__top {
  display: grid;
  gap: var(--space-6);
  padding-bottom: var(--space-6);
}

.page-certification .cert-hero__head {
  min-width: 0;
}

.page-certification .cert-hero__head .kicker {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-primary);
  margin: 0 0 var(--space-2);
  text-transform: uppercase;
}

.page-certification .cert-hero__title {
  font-family: var(--font-heading);
  font-size: var(--text-display);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
  margin: 0;
  word-break: break-word;
}

.page-certification .cert-hero__sub {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  line-height: 1.35;
  color: var(--color-ink-soft);
  letter-spacing: 0.04em;
  margin: var(--space-2) 0 0;
}

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

.page-certification .cert-hero__stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3) var(--space-6);
  border-top: var(--border-thin) solid var(--color-line);
  padding-top: var(--space-3);
}

.page-certification .cert-stat {
  display: flex;
  align-items: baseline;
  gap: var(--space-1);
}

.page-certification .cert-stat__num {
  font-family: var(--font-mono);
  font-size: var(--text-2xl);
  line-height: 1;
  color: var(--color-accent);
}

.page-certification .cert-stat__lbl {
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
  letter-spacing: 0.03em;
}

/* 深底条款目录带 */
.page-certification .cert-band {
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  padding: var(--space-4) 0;
}

.page-certification .cert-band__inner {
  display: grid;
  gap: var(--space-2);
}

.page-certification .cert-band__label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  color: var(--color-contrast-accent);
  margin: 0;
  text-transform: uppercase;
}

.page-certification .cert-band__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-6);
  counter-reset: none;
}

.page-certification .cert-band__list a {
  display: inline-flex;
  align-items: baseline;
  gap: var(--space-1);
  font-size: var(--text-sm);
  color: var(--color-contrast-ink);
  text-decoration: none;
  padding-bottom: 3px;
  border-bottom: var(--border-thin) solid transparent;
  transition: border-color 160ms linear, color 160ms linear;
}

.page-certification .cert-band__list a .mono {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-contrast-accent);
  letter-spacing: 0.04em;
}

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

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

.page-certification .cert-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1440 / 540;
  object-fit: cover;
  filter: sepia(0.28) contrast(1.04) saturate(0.8);
}

/* ============ 正文与侧边目录 ============ */
.page-certification .cert-body {
  display: grid;
  gap: var(--space-6);
  padding-top: var(--section-y);
  padding-bottom: var(--section-y);
  align-items: start;
}

.page-certification .cert-toc-col {
  min-width: 0;
  order: -1;
}

.page-certification .cert-toc-col .toc {
  background: var(--color-surface-alt);
  border: 3px double var(--color-line);
  border-radius: var(--radius-sm);
  padding: var(--space-3);
}

.page-certification .cert-toc-col .toc__title {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  color: var(--color-primary);
  margin: 0;
  text-transform: uppercase;
}

.page-certification .cert-toc-col .toc__list {
  list-style: none;
  margin: var(--space-2) 0 0;
  padding: 0;
  display: grid;
  gap: var(--space-2);
}

.page-certification .cert-toc-col .toc__list a {
  display: flex;
  gap: var(--space-1);
  align-items: baseline;
  font-size: var(--text-sm);
  line-height: 1.4;
  color: var(--color-ink-soft);
  text-decoration: none;
  padding-bottom: 2px;
  border-bottom: var(--border-thin) solid transparent;
  transition: color 160ms linear, border-color 160ms linear;
}

.page-certification .cert-toc-col .toc__list a .mono {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
}

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

.page-certification .cert-toc-col .toc__list a[aria-current="true"] {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
  font-weight: 600;
}

.page-certification .cert-toc-col .toc__list a[aria-current="true"] .mono {
  color: var(--color-accent);
}

.page-certification .cert-article {
  min-width: 0;
}

/* ============ 合规域 ============ */
.page-certification .cert-domain {
  margin-bottom: var(--space-8);
  scroll-margin-top: calc(var(--space-8) + var(--space-6));
}

.page-certification .cert-domain:last-of-type {
  margin-bottom: var(--space-6);
}

.page-certification .cert-domain__head {
  display: grid;
  gap: var(--space-2);
  justify-items: start;
  padding-top: var(--space-3);
  border-top: 3px double var(--color-ink);
  margin-bottom: var(--space-4);
}

.page-certification .cert-domain__head .num-tag {
  justify-self: start;
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
}

.page-certification .cert-domain__head h2 {
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
  margin: 0;
}

.page-certification .cert-domain__scope {
  max-width: var(--measure);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
  margin: 0;
  padding-left: var(--space-2);
  border-left: 2px solid var(--color-primary);
}

/* ============ 条款 ============ */
.page-certification .cert-clause {
  border: 3px double var(--color-line);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  padding: var(--space-3);
  margin-bottom: var(--space-3);
  transition: border-color 180ms linear;
}

.page-certification .cert-clause:hover {
  border-color: var(--color-primary);
}

.page-certification .cert-clause__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--space-1) var(--space-2);
  margin-bottom: var(--space-2);
}

.page-certification .cert-clause__no {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: 0.08em;
  background: var(--color-primary);
  color: var(--color-primary-ink);
  padding: 2px var(--space-1);
  border-radius: var(--radius-sm);
  flex: 0 0 auto;
}

.page-certification .cert-clause__head h3 {
  flex: 1 1 auto;
  min-width: 0;
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: 0.02em;
  color: var(--color-ink);
  margin: 0;
}

.page-certification .cert-copy {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  background: transparent;
  border: var(--border-thin) solid var(--color-line);
  color: var(--color-ink-muted);
  border-radius: var(--radius-sm);
  padding: 2px var(--space-1);
  cursor: pointer;
  transition: color 160ms linear, border-color 160ms linear;
}

.page-certification .cert-copy:hover,
.page-certification .cert-copy:focus-visible {
  color: var(--color-accent);
  border-color: var(--color-accent);
}

.page-certification .cert-copy.is-copied {
  color: var(--color-primary);
  border-color: var(--color-primary);
}

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

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

.page-certification .cert-clause__meta {
  max-width: var(--measure);
  margin: 0;
  padding-top: var(--space-2);
  border-top: var(--border-thin) solid var(--color-line);
  font-size: var(--text-xs);
  line-height: 1.6;
  color: var(--color-ink-muted);
}

.page-certification .cert-clause__meta .mono {
  font-family: var(--font-mono);
  letter-spacing: 0.06em;
  color: var(--color-ink-soft);
}

.page-certification .cert-clause__sep {
  margin: 0 var(--space-1);
  color: var(--color-line);
}

/* ============ 图片 ============ */
.page-certification .cert-figure {
  margin: 0 0 var(--space-4);
}

.page-certification .cert-figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius-sm);
  filter: sepia(0.22) contrast(1.05) saturate(0.85);
}

.page-certification .cert-figure figcaption {
  margin-top: var(--space-1);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  color: var(--color-ink-muted);
}

/* ============ 小结框 ============ */
.page-certification .cert-digest {
  background: var(--color-primary-soft);
  border-left: 2px solid var(--color-accent);
  border-radius: var(--radius-sm);
  padding: var(--space-3) var(--space-4);
  margin: 0 0 var(--space-8);
}

.page-certification .cert-digest__title {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  color: var(--color-accent);
  margin: 0 0 var(--space-2);
  text-transform: uppercase;
}

.page-certification .cert-digest p:last-child {
  max-width: var(--measure);
  margin: 0;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink);
}

/* ============ 可折叠要点 ============ */
.page-certification .cert-note {
  background: var(--color-surface-alt);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-sm);
  padding: var(--space-2) var(--space-3);
  margin: 0 0 var(--space-3);
}

.page-certification .cert-note summary {
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.04em;
  color: var(--color-primary);
  list-style: none;
}

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

.page-certification .cert-note summary::before {
  content: "＋ ";
  color: var(--color-accent);
  font-family: var(--font-mono);
}

.page-certification .cert-note[open] summary::before {
  content: "－ ";
}

.page-certification .cert-note p {
  max-width: var(--measure);
  margin: var(--space-2) 0 0;
  padding-top: var(--space-2);
  border-top: var(--border-thin) solid var(--color-line);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

/* ============ 相关入口 ============ */
.page-certification .cert-related {
  border-top: 3px double var(--color-ink);
  padding-top: var(--space-4);
  margin-top: var(--space-6);
}

.page-certification .cert-related__title {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
  margin: 0 0 var(--space-2);
}

.page-certification .cert-related__lede {
  max-width: var(--measure);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
  margin: 0 0 var(--space-4);
}

.page-certification .cert-related__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-certification .cert-related__list li {
  display: grid;
  gap: var(--space-1);
  padding: var(--space-3) 0;
  border-top: var(--border-thin) solid var(--color-line);
}

.page-certification .cert-related__list li:last-child {
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-certification .cert-related__list a {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  line-height: 1.3;
  color: var(--color-ink);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  justify-self: start;
  transition: color 160ms linear, border-color 160ms linear;
}

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

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

/* ============ 响应式 ============ */
@media (min-width: 900px) {
  .page-certification .cert-hero__top {
    grid-template-columns: minmax(0, 1fr) 216px;
    gap: var(--space-8);
    align-items: end;
    padding-bottom: var(--space-8);
  }

  .page-certification .cert-hero__stats {
    flex-direction: column;
    flex-wrap: nowrap;
    align-items: flex-start;
    gap: var(--space-3);
    border-top: 0;
    border-left: var(--border-thin) solid var(--color-line);
    padding-top: 0;
    padding-left: var(--space-4);
  }

  .page-certification .cert-band__inner {
    grid-template-columns: 180px minmax(0, 1fr);
    align-items: baseline;
    gap: var(--space-6);
  }

  .page-certification .cert-clause {
    padding: var(--space-4);
  }

  .page-certification .cert-related__list li {
    grid-template-columns: 240px minmax(0, 1fr);
    align-items: baseline;
    gap: var(--space-4);
  }
}

@media (min-width: 1000px) {
  .page-certification .cert-body {
    grid-template-columns: var(--cert-toc-w) minmax(0, 1fr);
    gap: var(--cert-gutter-gap);
  }

  .page-certification .cert-toc-col {
    position: sticky;
    top: calc(var(--space-8) + var(--space-3));
    order: 0;
  }

  .page-certification .cert-article {
    max-width: 100%;
  }
}

@media (max-width: 480px) {
  .page-certification .cert-hero {
    padding-top: calc(var(--space-8) + var(--space-6));
  }

  .page-certification .cert-clause__head h3 {
    flex-basis: 100%;
    font-size: var(--text-base);
  }

  .page-certification .cert-digest {
    padding: var(--space-3);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-certification .cert-clause,
  .page-certification .cert-copy,
  .page-certification .cert-band__list a,
  .page-certification .cert-toc-col .toc__list a,
  .page-certification .cert-related__list a {
    transition: none;
  }
}
<<<END>>>