.page-about {
  --about-white-soft: rgba(255,255,255,0.82);
  --about-white-dim: rgba(255,255,255,0.55);
  --about-white-faint: rgba(255,255,255,0.08);
  --about-line-soft: rgba(31,59,87,0.38);
  --about-signal-glow: rgba(242,101,34,0.2);
  background: var(--panel);
  color: var(--text);
}
.page-about img {
  max-width: 100%;
  height: auto;
}

/* 首屏海报区 */
.page-about .about-hero {
  position: relative;
  background: var(--space);
  color: var(--white);
  padding: 2.75rem var(--page-gutter) 3.5rem;
  border-bottom: 2px solid var(--line);
}
.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: clamp(100px, 16vw, 220px);
  height: 6px;
  background: var(--signal);
}
.page-about .about-hero-inner {
  max-width: var(--content-w);
  margin: 0 auto;
  display: grid;
  gap: 2.5rem;
}
.page-about .about-breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 2rem;
  font-size: 0.8125rem;
}
.page-about .about-breadcrumb a {
  color: var(--about-white-soft);
  text-decoration: none;
  font-weight: 500;
  padding: 0.25rem 0;
  border-bottom: 2px solid transparent;
  transition: color var(--ease), border-color var(--ease);
}
.page-about .about-breadcrumb a:hover,
.page-about .about-breadcrumb a:focus-visible {
  color: var(--signal);
  border-bottom-color: var(--signal);
}
.page-about .about-breadcrumb-sep {
  color: var(--line);
}
.page-about .about-breadcrumb-current {
  color: var(--about-white-dim);
  font-weight: 700;
}
.page-about .about-eyebrow {
  margin: 0 0 0.875rem;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--signal);
}
.page-about .about-hero h1 {
  margin: 0 0 1.25rem;
  font-size: clamp(2.25rem, 7vw, 4.75rem);
  font-weight: 900;
  letter-spacing: -0.04em;
  line-height: 1.04;
  max-width: 13em;
}
.page-about .about-hero-lead {
  margin: 0 0 2rem;
  font-size: 1.0625rem;
  line-height: 1.85;
  color: var(--about-white-soft);
  max-width: 42em;
}
.page-about .about-hero-lead strong,
.page-about .about-why-text strong {
  color: var(--white);
  font-weight: 700;
  text-decoration: underline;
  text-decoration-color: var(--signal);
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
}
.page-about .about-hero-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem 2.75rem;
  padding-top: 1.5rem;
  border-top: 2px solid var(--line);
}
.page-about .about-hero-fact {
  display: grid;
  gap: 0.25rem;
}
.page-about .about-hero-fact-num {
  font-family: var(--font-mono);
  font-size: clamp(1.75rem, 4.5vw, 2.5rem);
  font-weight: 900;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--white);
}
.page-about .about-hero-fact-label {
  font-size: 0.8125rem;
  letter-spacing: 0.02em;
  color: var(--about-white-dim);
}

/* 右侧固定导读 */
.page-about .about-guide {
  background: var(--glass);
  border: 2px solid var(--line);
  padding: 1.5rem 1.25rem;
}
.page-about .about-guide-title {
  margin: 0 0 1rem;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--about-white-soft);
}
.page-about .about-guide-list {
  list-style: none;
  margin: 0 0 1.25rem;
  padding: 0;
  display: grid;
  gap: 0.375rem;
}
.page-about .about-guide-list a {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.625rem 0.75rem;
  color: var(--white);
  text-decoration: none;
  border: 2px solid transparent;
  transition: border-color var(--ease), background-color var(--ease), transform var(--ease);
}
.page-about .about-guide-list a:hover,
.page-about .about-guide-list a:focus-visible {
  border-color: var(--signal);
  background: var(--glass);
  transform: translateX(3px);
}
.page-about .about-guide-num {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--signal);
}
.page-about .about-guide-text {
  font-size: 0.9375rem;
  font-weight: 500;
}
.page-about .about-guide-note {
  margin: 1.25rem 0 0;
  padding-top: 1rem;
  border-top: 2px solid var(--line);
  font-size: 0.8125rem;
  line-height: 1.7;
  color: var(--about-white-dim);
}

/* 版块通用结构 */
.page-about .about-section {
  padding: 3.5rem var(--page-gutter) 4rem;
  scroll-margin-top: calc(var(--header-h) + 16px);
}
.page-about .about-growth-inner,
.page-about .about-stats-inner,
.page-about .about-why-inner,
.page-about .about-process-inner {
  max-width: var(--content-w);
  margin: 0 auto;
}
.page-about .about-section-head {
  position: relative;
  margin-bottom: 2.5rem;
  padding-top: 1.25rem;
  border-top: 4px solid var(--line);
}
.page-about .about-section-num {
  display: block;
  margin-bottom: 0.75rem;
  font-family: var(--font-mono);
  font-size: clamp(2.75rem, 7vw, 4.5rem);
  font-weight: 900;
  line-height: 1;
  letter-spacing: -0.04em;
  color: rgba(11, 26, 42, 0.09);
  pointer-events: none;
  user-select: none;
}
.page-about .about-kicker {
  margin: 0 0 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--signal);
}
.page-about .about-section-head h2 {
  margin: 0 0 0.75rem;
  font-size: clamp(1.75rem, 4.5vw, 2.875rem);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.12;
}
.page-about .about-section-desc {
  margin: 0;
  max-width: 40em;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--muted);
}

/* 成长轨迹 */
.page-about .about-growth {
  position: relative;
  overflow: hidden;
  background: var(--track);
  color: var(--white);
}
.page-about .about-growth-bg {
  position: absolute;
  top: 3rem;
  right: -0.08em;
  font-family: var(--font-mono);
  font-size: clamp(9rem, 22vw, 20rem);
  font-weight: 900;
  line-height: 1;
  letter-spacing: -0.05em;
  color: var(--about-white-faint);
  pointer-events: none;
  user-select: none;
}
.page-about .about-growth .about-section-num,
.page-about .about-section-head--inverse .about-section-num {
  color: var(--about-white-faint);
}
.page-about .about-growth .about-section-desc,
.page-about .about-why .about-section-desc {
  color: var(--about-white-dim);
}
.page-about .about-growth-figure {
  margin: 0 0 2.5rem;
}
.page-about .about-growth-img {
  display: block;
  border: 2px solid var(--line);
  box-shadow: var(--shadow);
}
.page-about .about-growth-figcaption {
  margin-top: 0.75rem;
  font-size: 0.8125rem;
  line-height: 1.6;
  text-align: right;
  color: var(--about-white-dim);
}
.page-about .about-timeline {
  position: relative;
  list-style: none;
  margin: 2.5rem 0 0;
  padding: 0;
  max-width: 60rem;
}
.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 0.5rem;
  bottom: 0;
  width: 2px;
  background: var(--line);
}
.page-about .about-timeline-item {
  position: relative;
  padding: 0 0 2.5rem 2.25rem;
}
.page-about .about-timeline-item:last-child {
  padding-bottom: 0;
}
.page-about .about-timeline-node {
  position: absolute;
  left: 0;
  top: 0.25rem;
  width: 12px;
  height: 12px;
  border: 3px solid var(--line);
  border-radius: 50%;
  background: var(--track);
  transition: background-color var(--ease), border-color var(--ease), box-shadow var(--ease);
}
.page-about .about-timeline-item:hover .about-timeline-node,
.page-about .about-timeline-item:focus-within .about-timeline-node {
  background: var(--signal);
  border-color: var(--signal);
  box-shadow: 0 0 0 5px var(--about-signal-glow);
}
.page-about .about-timeline-phase {
  display: inline-block;
  margin-bottom: 0.625rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--signal);
}
.page-about .about-timeline-card {
  border: 2px solid var(--line);
  background: var(--glass);
  padding: 1.25rem 1.375rem;
  transition: border-color var(--ease), transform var(--ease);
}
.page-about .about-timeline-item:hover .about-timeline-card {
  border-color: var(--signal);
  transform: translateX(4px);
}
.page-about .about-timeline-card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.25rem;
  font-weight: 900;
  letter-spacing: -0.01em;
  color: var(--white);
}
.page-about .about-timeline-card p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--about-white-soft);
}
.page-about .about-growth-note {
  margin: 2.25rem 0 0;
  padding: 1.25rem 1.5rem;
  border: 2px solid var(--line);
  border-left: 4px solid var(--signal);
  background: var(--glass);
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--about-white-dim);
}
.page-about .about-growth-note a {
  color: var(--white);
  font-weight: 700;
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
  text-decoration-color: var(--signal);
  transition: color var(--ease);
}
.page-about .about-growth-note a:hover {
  color: var(--signal);
}

/* 今天的数据 */
.page-about .about-stats {
  background: var(--panel);
  color: var(--text);
}
.page-about .about-stats-layout {
  display: grid;
  gap: 2.5rem;
}
.page-about .about-stats-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}
.page-about .about-stat-card {
  background: var(--white);
  border: 2px solid var(--line);
  box-shadow: var(--shadow);
  padding: 1.375rem 1.5rem 1.5rem;
  transition: border-color var(--ease), box-shadow var(--ease), transform var(--ease);
}
.page-about .about-stat-card:hover {
  border-color: var(--signal);
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}
.page-about .about-stat-num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.875rem, 5vw, 2.625rem);
  font-weight: 900;
  letter-spacing: -0.04em;
  line-height: 1;
  color: var(--text);
}
.page-about .about-stat-label {
  display: inline-block;
  margin-top: 0.875rem;
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--text);
}
.page-about .about-stat-desc {
  margin: 0.5rem 0 0;
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--muted);
}
.page-about .about-stat-card--status {
  background: var(--space);
  color: var(--white);
}
.page-about .about-stat-card--status .about-stat-label {
  color: var(--white);
}
.page-about .about-stat-card--status .about-stat-desc {
  color: var(--about-white-dim);
}
.page-about .about-status-list {
  display: grid;
  gap: 0.5rem;
  margin: 0.875rem 0 0;
}
.page-about .about-status-row {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  padding: 0.5rem 0.625rem;
  border: 1px solid var(--about-line-soft);
  background: var(--glass);
}
.page-about .about-status-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--signal);
  box-shadow: 0 0 0 3px var(--about-signal-glow);
}
.page-about .about-status-name {
  flex: 1;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--white);
}
.page-about .about-status-pill {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--signal);
  border: 1px solid var(--signal);
  background: var(--signal-soft);
  padding: 0.125rem 0.5rem;
}
.page-about .about-stats-figure {
  margin: 0;
}
.page-about .about-stats-figure img {
  display: block;
  width: 100%;
  border: 2px solid var(--line);
  box-shadow: var(--shadow);
}
.page-about .about-stats-figcaption {
  margin-top: 0.75rem;
  font-size: 0.8125rem;
  line-height: 1.6;
  color: var(--muted);
}

/* 为什么坚持入口归整 */
.page-about .about-why {
  background: var(--space);
  color: var(--white);
}
.page-about .about-why-layout {
  display: grid;
  gap: 2.5rem;
}
.page-about .about-why-body {
  max-width: 46em;
}
.page-about .about-why-statement {
  margin: 0 0 1.5rem;
  padding-left: 1.25rem;
  border-left: 4px solid var(--signal);
  font-size: clamp(1.375rem, 3.5vw, 2rem);
  font-weight: 900;
  letter-spacing: -0.01em;
  line-height: 1.4;
}
.page-about .about-why-text {
  margin: 0 0 1.75rem;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--about-white-soft);
}
.page-about .about-why-list {
  list-style: none;
  margin: 0 0 1.75rem;
  padding: 0;
  display: grid;
  gap: 0.75rem;
}
.page-about .about-why-list li {
  position: relative;
  padding: 1rem 1.125rem 1rem 1.5rem;
  background: var(--glass);
  border: 1px solid var(--line);
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--about-white-soft);
  transition: border-color var(--ease), transform var(--ease);
}
.page-about .about-why-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--signal);
}
.page-about .about-why-list li:hover {
  border-color: var(--signal);
  transform: translateX(3px);
}
.page-about .about-why-more {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--about-white-dim);
}
.page-about .about-why-more a {
  color: var(--white);
  font-weight: 700;
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
  text-decoration-color: var(--signal);
  transition: color var(--ease);
}
.page-about .about-why-more a:hover {
  color: var(--signal);
}

/* 内容怎么更新 */
.page-about .about-process {
  background: var(--panel);
}
.page-about .about-process-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1.25rem;
}
.page-about .about-process-step {
  position: relative;
  padding: 1.5rem 3rem 1.5rem 1.5rem;
  background: var(--white);
  border: 2px solid var(--line);
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: border-color var(--ease), box-shadow var(--ease), transform var(--ease);
}
.page-about .about-process-step:hover {
  border-color: var(--signal);
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}
.page-about .about-process-num {
  display: inline-block;
  margin-bottom: 0.875rem;
  padding: 0.125rem 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--signal);
  border: 1px solid var(--signal);
  background: var(--signal-soft);
}
.page-about .about-process-step h3 {
  margin: 0 0 0.5rem;
  font-size: 1.125rem;
  font-weight: 900;
  color: var(--text);
}
.page-about .about-process-step p {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--muted);
}
.page-about .about-process-arrow {
  position: absolute;
  right: 1.25rem;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.375rem;
  line-height: 1;
  color: var(--signal);
  transition: transform var(--ease);
}
.page-about .about-process-step:hover .about-process-arrow,
.page-about .about-process-step:focus-within .about-process-arrow {
  transform: translate(4px, -50%);
}
.page-about .about-process-figure {
  margin: 2rem 0 0;
}
.page-about .about-process-figure img {
  display: block;
  width: 100%;
  border: 2px solid var(--line);
  box-shadow: var(--shadow);
}
.page-about .about-process-figcaption {
  margin-top: 0.75rem;
  font-size: 0.8125rem;
  line-height: 1.6;
  color: var(--muted);
}
.page-about .about-process-foot {
  margin: 1.25rem 0 0;
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--muted);
}
.page-about .about-process-foot a {
  color: var(--signal);
  font-weight: 700;
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
  transition: color var(--ease);
}
.page-about .about-process-foot a:hover {
  color: var(--text);
}

/* 底部相关页面导航 */
.page-about .about-close {
  padding: 2.5rem var(--page-gutter) 3rem;
  background: var(--track);
  border-top: 2px solid var(--line);
}
.page-about .about-close-note {
  max-width: var(--content-w);
  margin: 0 auto 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--signal);
}
.page-about .about-close-links {
  max-width: var(--content-w);
  margin: 0 auto;
  display: grid;
  gap: 1rem;
}
.page-about .about-close-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.125rem 1.25rem;
  background: var(--glass);
  border: 2px solid var(--line);
  color: var(--white);
  text-decoration: none;
  font-size: 0.9375rem;
  font-weight: 700;
  transition: border-color var(--ease), transform var(--ease), background-color var(--ease);
}
.page-about .about-close-link::after {
  content: "→";
  color: var(--signal);
  font-size: 1.125rem;
  line-height: 1;
  transition: transform var(--ease);
}
.page-about .about-close-link:hover,
.page-about .about-close-link:focus-visible {
  border-color: var(--signal);
  transform: translateX(3px);
}
.page-about .about-close-link:hover::after,
.page-about .about-close-link:focus-visible::after {
  transform: translateX(3px);
}

@media (min-width: 720px) {
  .page-about .about-hero-inner {
    gap: 3rem;
  }
  .page-about .about-stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .page-about .about-process-steps {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
  }
  .page-about .about-close-links {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .page-about .about-hero {
    min-height: calc(100vh - var(--header-h));
    padding: 4.5rem var(--page-gutter) 5rem;
  }
  .page-about .about-hero-inner {
    grid-template-columns: minmax(0, 1.55fr) minmax(280px, 0.7fr);
    gap: 4.5rem;
    align-items: start;
  }
  .page-about .about-guide {
    position: sticky;
    top: calc(var(--header-h) + 28px);
    margin-top: 5rem;
  }
  .page-about .about-section {
    padding: 5.5rem var(--page-gutter) 6rem;
  }
  .page-about .about-section-head {
    padding-top: 2rem;
  }
  .page-about .about-section-num {
    position: absolute;
    top: -2.75rem;
    right: 0;
    margin-bottom: 0;
    font-size: clamp(5rem, 10vw, 8rem);
  }
  .page-about .about-section-head h2,
  .page-about .about-kicker,
  .page-about .about-section-desc {
    position: relative;
    z-index: 1;
  }
  .page-about .about-timeline-item {
    display: grid;
    grid-template-columns: 10rem minmax(0, 1fr);
    gap: 1.5rem;
  }
  .page-about .about-timeline-phase {
    display: block;
    margin-bottom: 0;
    padding-top: 0.5rem;
    text-align: right;
  }
  .page-about .about-stats-layout {
    grid-template-columns: minmax(0, 1.3fr) minmax(280px, 0.7fr);
    gap: 3rem;
    align-items: stretch;
  }
  .page-about .about-stats-figure img {
    height: 100%;
    min-height: 420px;
    object-fit: cover;
  }
  .page-about .about-why-layout {
    grid-template-columns: minmax(280px, 0.65fr) minmax(0, 1.35fr);
    gap: 4rem;
    align-items: start;
  }
  .page-about .about-process-steps {
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
  }
  .page-about .about-process-step {
    padding: 1.75rem 3.5rem 1.75rem 1.5rem;
  }
  .page-about .about-close-links {
    grid-template-columns: repeat(4, 1fr);
    gap: 1.25rem;
  }
}