/* ===== 品牌概况 /profile/ 页面专属样式 ===== */

.page-about {
  --about-rule: color-mix(in srgb, var(--color-primary) 26%, transparent);
  --about-tick: calc(var(--border-thin) * 2);
  display: block;
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumb {
  padding-block: var(--space-3) 0;
}

.page-about .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}

.page-about .breadcrumb a {
  color: var(--color-ink-soft);
  text-decoration: none;
  transition: color 160ms ease;
}

.page-about .breadcrumb a:hover,
.page-about .breadcrumb a:focus-visible {
  color: var(--color-primary);
}

.page-about .breadcrumb li[aria-current] {
  color: var(--color-ink);
}

/* ---------- 页首 ---------- */
.page-about .about-intro {
  padding-block: var(--space-6) var(--space-8);
}

.page-about .about-intro .eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-primary);
}

.page-about .about-title {
  margin: var(--space-2) 0 0;
  max-width: 22ch;
  font-family: var(--font-heading);
  font-size: var(--text-3xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}

.page-about .about-intro .lede {
  margin: var(--space-3) 0 0;
  max-width: var(--measure);
  font-size: var(--text-lg);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-about .intro-figures {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-4);
  margin-top: var(--space-6);
  padding-top: var(--space-4);
  background-image: repeating-linear-gradient(to right, var(--about-rule) 0 1px, transparent 1px 14px);
  background-repeat: no-repeat;
  background-position: top left;
  background-size: 100% 10px;
}

.page-about .intro-figure {
  display: grid;
  gap: var(--space-1);
}

.page-about .intro-figure .figure-num {
  font-family: var(--font-mono);
  font-size: var(--text-figure);
  font-weight: var(--weight-heading);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--color-primary);
}

.page-about .intro-figure .figure-label {
  max-width: 30ch;
  font-size: var(--text-sm);
  line-height: 1.7;
  color: var(--color-ink-soft);
}

/* ---------- 章节索引 ---------- */
.page-about .index-rail {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin: var(--space-6) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .index-link {
  display: inline-flex;
  align-items: baseline;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-pill);
  background: var(--color-surface-alt);
  color: var(--color-ink-soft);
  font-size: var(--text-sm);
  text-decoration: none;
  transition: background 180ms ease, color 180ms ease, transform 180ms ease;
}

.page-about .index-link .num {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-primary);
}

.page-about .index-link:hover,
.page-about .index-link:focus-visible {
  background: var(--color-primary-soft);
  color: var(--color-primary);
  transform: translateY(-2px);
}

/* ---------- 区块与章节头 ---------- */
.page-about .section {
  padding-block: var(--section-y);
}

.page-about .section-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: var(--space-3);
  align-items: start;
  margin-bottom: var(--space-6);
}

.page-about .section-head .eyebrow {
  margin: 0 0 var(--space-1);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-primary);
}

.page-about .section-num {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-2xl);
  font-weight: var(--weight-heading);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--color-primary);
  text-decoration: none;
  transition: color 180ms ease;
}

.page-about .section-num:hover,
.page-about .section-num:focus-visible {
  color: var(--color-accent);
}

.page-about .section-head h2 {
  margin: 0;
  font-size: var(--text-2xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}

/* ---------- 栅格 ---------- */
.page-about .grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-6);
}

/* ---------- 图片容器 ---------- */
.page-about .media-frame {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  border-radius: var(--radius-lg);
  background: var(--color-surface-deep);
}

.page-about .media-frame--wide {
  aspect-ratio: 21 / 9;
}

.page-about .media-frame img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  max-width: 100%;
  height: auto;
}

.page-about .scope-figure {
  margin: 0;
}

.page-about .media-caption {
  margin-top: var(--space-2);
  font-size: var(--text-xs);
  line-height: 1.75;
  color: var(--color-ink-muted);
}

/* ---------- 01 记录范围 ---------- */
.page-about .scope-body p {
  margin: 0 0 var(--space-3);
  max-width: var(--measure);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink);
}

.page-about .scope-facts {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-2);
  margin-top: var(--space-4);
}

.page-about .scope-fact {
  display: grid;
  gap: var(--space-1);
  align-content: start;
  padding: var(--space-3);
  border-radius: var(--radius-md);
  background: var(--color-surface);
}

.page-about .scope-fact .fact-value {
  font-family: var(--font-mono);
  font-size: var(--text-xl);
  font-weight: var(--weight-heading);
  line-height: 1.1;
  color: var(--color-primary);
}

.page-about .scope-fact .fact-note {
  font-size: var(--text-sm);
  line-height: 1.75;
  color: var(--color-ink-soft);
}

/* ---------- 02 推进次序：刻度尺 ---------- */
.page-about .ruler {
  display: grid;
  gap: var(--space-2);
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .ruler-step {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: var(--space-3);
  align-items: start;
  padding: var(--space-3);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  transition: transform 180ms ease, box-shadow 180ms ease;
}

.page-about .ruler-step:hover,
.page-about .ruler-step:focus-within {
  transform: translateY(-3px);
  box-shadow: var(--shadow-1);
}

.page-about .ruler-order {
  padding-left: var(--space-2);
  border-left: var(--about-tick) solid var(--about-rule);
  font-family: var(--font-mono);
  font-size: var(--text-xl);
  line-height: 1.15;
  color: var(--color-primary);
  transition: border-color 180ms ease;
}

.page-about .ruler-step:hover .ruler-order,
.page-about .ruler-step:focus-within .ruler-order {
  border-color: var(--color-accent);
}

.page-about .ruler-name {
  margin: 0;
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: 1.4;
  color: var(--color-ink);
}

.page-about .ruler-brief {
  margin: var(--space-1) 0 0;
  font-size: var(--text-sm);
  line-height: 1.75;
  color: var(--color-ink-soft);
}

.page-about .ruler-detail {
  margin: var(--space-2) 0 0;
  max-width: var(--measure);
  font-size: var(--text-sm);
  line-height: 1.85;
  color: var(--color-ink-muted);
  transition: color 180ms ease;
}

.page-about .ruler-step:hover .ruler-detail,
.page-about .ruler-step:focus-within .ruler-detail {
  color: var(--color-ink-soft);
}

/* ---------- 03 能力边界 ---------- */
.page-about .bounds {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-3);
}

.page-about .bound-item {
  display: grid;
  gap: var(--space-2);
  align-content: start;
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  transition: transform 180ms ease, box-shadow 180ms ease;
}

.page-about .bound-item:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-1);
}

.page-about .bound-item h3 {
  margin: 0;
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: 1.4;
  color: var(--color-ink);
}

.page-about .bound-item p {
  margin: 0;
  font-size: var(--text-sm);
  line-height: 1.85;
  color: var(--color-ink-soft);
}

.page-about .bound-item a {
  color: var(--color-primary);
  text-decoration: underline;
  text-decoration-color: var(--about-rule);
  text-underline-offset: 3px;
  transition: color 160ms ease, text-decoration-color 160ms ease;
}

.page-about .bound-item a:hover,
.page-about .bound-item a:focus-visible {
  color: var(--color-accent);
  text-decoration-color: var(--color-accent);
}

/* ---------- 04 数据治理 ---------- */
.page-about .principles {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-2);
}

.page-about .principle {
  display: grid;
  gap: var(--space-2);
  align-content: start;
  padding: var(--space-3);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  transition: transform 180ms ease, box-shadow 180ms ease;
}

.page-about .principle:hover,
.page-about .principle:focus-within {
  transform: translateY(-3px);
  box-shadow: var(--shadow-1);
}

.page-about .principle-head {
  display: flex;
  align-items: baseline;
  gap: var(--space-2);
}

.page-about .principle-head .num {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-primary);
}

.page-about .principle h3 {
  margin: 0;
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: 1.4;
  color: var(--color-ink);
}

.page-about .principle p {
  margin: 0;
  font-size: var(--text-sm);
  line-height: 1.85;
  color: var(--color-ink-soft);
}

.page-about .principle-link {
  align-self: start;
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
  text-decoration: none;
  border-bottom: var(--border-thin) solid var(--color-line);
  transition: color 160ms ease, border-color 160ms ease;
}

.page-about .principle:hover .principle-link,
.page-about .principle-link:focus-visible {
  color: var(--color-accent);
  border-color: var(--color-accent);
}

/* ---------- 05 维护分工 ---------- */
.page-about .roles {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-3);
}

.page-about .role {
  display: grid;
  gap: var(--space-1);
  align-content: start;
  padding: var(--space-3);
  border-radius: var(--radius-md);
  background: var(--color-surface-alt);
}

.page-about .role-name {
  margin: 0;
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  color: var(--color-ink);
}

.page-about .role-name .num {
  display: inline-block;
  margin-right: var(--space-1);
  padding-left: var(--space-2);
  border-left: var(--about-tick) solid var(--color-primary-soft);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-primary);
}

.page-about .role p {
  margin: 0;
  font-size: var(--text-sm);
  line-height: 1.85;
  color: var(--color-ink-soft);
}

.page-about .role p a {
  color: var(--color-primary);
  text-decoration: underline;
  text-decoration-color: var(--about-rule);
  text-underline-offset: 3px;
}

.page-about .role p a:hover,
.page-about .role p a:focus-visible {
  color: var(--color-accent);
}

.page-about .coop-note {
  margin: var(--space-4) 0 0;
  max-width: var(--measure);
  padding: var(--space-3);
  border-radius: var(--radius-md);
  background: var(--color-primary-soft);
  font-size: var(--text-sm);
  line-height: 1.9;
  color: var(--color-ink);
}

/* ---------- 06 强对比收束区 ---------- */
.page-about .section--score {
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
}

.page-about .section--score .eyebrow {
  color: var(--color-contrast-accent);
}

.page-about .section--score .section-num {
  color: var(--color-contrast-accent);
}

.page-about .section--score .section-num:hover,
.page-about .section--score .section-num:focus-visible {
  color: var(--color-accent);
}

.page-about .section--score .section-head h2 {
  color: var(--color-contrast-ink);
}

.page-about .outro-body {
  max-width: var(--measure);
}

.page-about .outro-body p {
  margin: 0 0 var(--space-4);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-contrast-ink);
}

.page-about .cluster {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
}

.page-about .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-2) var(--space-3);
  border: var(--border-thin) solid transparent;
  border-radius: var(--radius-pill);
  font-size: var(--text-sm);
  font-weight: var(--weight-heading);
  text-decoration: none;
  background: var(--color-primary);
  color: var(--color-primary-ink);
  transition: background 180ms ease, color 180ms ease, border-color 180ms ease, transform 180ms ease;
}

.page-about .btn:hover,
.page-about .btn:focus-visible {
  transform: translateY(-2px);
}

.page-about .btn--accent {
  background: var(--color-accent);
  color: var(--color-accent-ink);
}

.page-about .btn--ghost {
  background: transparent;
  color: var(--color-ink);
  border-color: var(--color-line);
}

.page-about .section--score .btn--ghost {
  color: var(--color-contrast-ink);
  border-color: color-mix(in srgb, var(--color-contrast-ink) 42%, transparent);
}

.page-about .section--score .btn--ghost:hover,
.page-about .section--score .btn--ghost:focus-visible {
  color: var(--color-contrast-accent);
  border-color: var(--color-contrast-accent);
}

.page-about .outro-media {
  margin-top: var(--space-6);
  background: color-mix(in srgb, var(--color-contrast-ink) 14%, transparent);
}

/* ---------- 焦点反馈 ---------- */
.page-about a:focus-visible {
  outline: var(--about-tick) solid var(--color-focus);
  outline-offset: 2px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 560px) {
  .page-about .scope-facts {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .intro-figures {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--space-3);
  }
}

@media (min-width: 720px) {
  .page-about .about-title {
    font-size: var(--text-4xl);
  }

  .page-about .section-num {
    font-size: var(--text-4xl);
  }

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

@media (min-width: 860px) {
  .page-about .bounds {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

  .page-about .ruler-step {
    padding: var(--space-4);
  }
}

@media (min-width: 900px) {
  .page-about .grid {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: var(--gutter);
  }

  .page-about .col-7 {
    grid-column: span 7;
  }

  .page-about .col-5 {
    grid-column: span 5;
  }

  .page-about .scope-grid {
    align-items: start;
  }
}

@media (min-width: 1040px) {
  .page-about .section-head {
    gap: var(--space-4);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .index-link,
  .page-about .ruler-step,
  .page-about .ruler-order,
  .page-about .ruler-detail,
  .page-about .bound-item,
  .page-about .principle,
  .page-about .principle-link,
  .page-about .btn {
    transition: none;
  }

  .page-about .index-link:hover,
  .page-about .ruler-step:hover,
  .page-about .bound-item:hover,
  .page-about .principle:hover,
  .page-about .btn:hover {
    transform: none;
  }
}