/* ============================================================
   核验规范 / spec —— 页面专属样式
   作用域：.page-standards
   ============================================================ */

.page-standards {
  background: var(--color-surface);
}

/* ---------- 首屏 ---------- */

.page-standards .spec-hero {
  padding-top: var(--space-4);
}

.page-standards .spec-hero .eyebrow {
  margin-bottom: var(--space-3);
}

.page-standards .spec-hero__lede {
  max-width: var(--measure);
  margin-top: var(--space-4);
  color: var(--color-ink-soft);
}

.page-standards .spec-hero__lower {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-8);
  margin-top: var(--space-8);
}

.page-standards .spec-hero__figures {
  display: grid;
  gap: 0;
}

.page-standards .hero-figure {
  padding-block: var(--space-6);
}

.page-standards .hero-figure:first-child {
  padding-top: 0;
}

.page-standards .hero-figure:last-child {
  padding-bottom: 0;
}

.page-standards .hero-figure .figure {
  display: block;
  font-family: var(--font-heading);
  line-height: 0.86;
  color: var(--color-contrast-surface);
}

.page-standards .hero-figure .figure-label {
  display: block;
  margin-top: var(--space-2);
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}

.page-standards .hero-figure__note {
  display: block;
  max-width: 38ch;
  margin-top: var(--space-1);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-muted);
}

.page-standards .spec-hero__visual {
  position: relative;
  aspect-ratio: 3 / 4;
  overflow: hidden;
  background: var(--color-contrast-surface);
}

.page-standards .spec-hero__visual img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.35;
}

.page-standards .spec-flow {
  position: absolute;
  inset: var(--space-4);
  width: calc(100% - var(--space-8));
  height: calc(100% - var(--space-8));
}

.page-standards .spec-flow__lines {
  fill: none;
  stroke: var(--color-contrast-accent);
  stroke-width: 1;
  vector-effect: non-scaling-stroke;
}

.page-standards .spec-flow__labels {
  fill: var(--color-contrast-ink);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.06em;
}

@media (min-width: 900px) {
  .page-standards .spec-hero__lower {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: var(--gutter);
    align-items: center;
  }
}

/* ---------- 能力区 ---------- */

.page-standards .cap-list {
  display: grid;
  gap: var(--space-8);
  margin-top: var(--space-6);
}

@media (min-width: 900px) {
  .page-standards .cap-list {
    gap: var(--space-8);
    margin-top: var(--space-8);
  }
}

.page-standards .cap__media {
  position: relative;
}

.page-standards .cap__index {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.18em;
  color: var(--color-contrast-accent);
}

.page-standards .cap__title {
  margin-top: var(--space-1);
  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-contrast-ink);
}

.page-standards .cap__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-6);
  margin-top: var(--space-6);
}

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

.page-standards .cap__list {
  display: grid;
  gap: var(--space-2);
  margin-top: var(--space-3);
  padding: 0;
  list-style: none;
}

.page-standards .cap__list li {
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink);
}

.page-standards .cap__std {
  margin-top: var(--space-6);
}

.page-standards .cap__facts {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-4);
  margin: var(--space-3) 0 0;
}

.page-standards .cap__fact {
  margin: 0;
}

.page-standards .cap__fact dt {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  color: var(--color-ink-muted);
}

.page-standards .cap__fact dd {
  margin: var(--space-1) 0 0;
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}

@media (min-width: 720px) {
  .page-standards .cap__title {
    font-size: var(--text-2xl);
  }

  .page-standards .cap__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--gutter);
  }

  .page-standards .cap__facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--gutter);
  }
}

/* ---------- 承接边界 ---------- */

.page-standards .quote {
  max-width: var(--measure);
  margin-top: var(--space-6);
}

.page-standards .bound-list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-6);
  margin-top: var(--space-8);
  padding: 0;
  list-style: none;
}

.page-standards .bound-item__title {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}

.page-standards .bound-item__desc {
  max-width: 42ch;
  margin-top: var(--space-2);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-standards .expand {
  margin-top: var(--space-8);
}

.page-standards .expand__summary {
  font-size: var(--text-base);
  font-weight: var(--weight-heading);
  color: var(--color-accent);
  cursor: pointer;
  list-style: none;
  text-decoration: underline;
  text-underline-offset: 0.24em;
}

.page-standards .expand__summary::-webkit-details-marker {
  display: none;
}

.page-standards .expand__summary::marker {
  content: "";
}

.page-standards .expand__body {
  margin-top: var(--space-4);
}

.page-standards .expand__body .cap__list {
  margin-top: 0;
}

@media (min-width: 720px) {
  .page-standards .bound-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-6) var(--gutter);
  }
}

/* ---------- 延伸入口 ---------- */

.page-standards .next-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-6);
  margin-top: var(--space-6);
}

.page-standards .next-link {
  display: block;
  color: inherit;
  text-decoration: none;
}

.page-standards .next-link__kicker {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.16em;
  color: var(--color-ink-muted);
}

.page-standards .next-link__title {
  display: block;
  margin-top: var(--space-2);
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-ink);
  transition: color 160ms ease;
}

.page-standards .next-link:hover .next-link__title,
.page-standards .next-link:focus-visible .next-link__title {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 0.22em;
}

@media (min-width: 720px) {
  .page-standards .next-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--gutter);
  }
}

@media (min-width: 1000px) {
  .page-standards .next-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 窄屏保护与动效收敛 ---------- */

@media (max-width: 480px) {
  .page-standards .spec-hero__visual {
    aspect-ratio: 1 / 1;
  }

  .page-standards .spec-flow {
    inset: var(--space-3);
    width: calc(100% - var(--space-6));
    height: calc(100% - var(--space-6));
  }
}

.page-standards img,
.page-standards svg {
  max-width: 100%;
}

.page-standards .spec-hero__visual img {
  max-width: none;
}

@media (prefers-reduced-motion: reduce) {
  .page-standards .next-link__title {
    transition: none;
  }
}