.page-about {
  --about-grid-line: rgba(42, 90, 74, 0.34);
  --about-deco-line: rgba(57, 255, 20, 0.07);
  --about-scope-bg: var(--color-bg-mid);
  background:
    repeating-radial-gradient(circle at 82% 8%, var(--about-deco-line) 0 2px, transparent 2px 44px),
    linear-gradient(180deg, var(--color-bg-dark) 0%, var(--color-bg-mid) 100%);
  color: var(--color-text);
  font-family: var(--font-body);
  line-height: 1.7;
}

.page-about .site-container {
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--gutters);
}

.page-about .breadcrumb {
  margin-bottom: 1.5rem;
}

.page-about .section-head {
  display: grid;
  gap: 0.6rem;
  margin-bottom: 2rem;
}

.page-about .section--tight {
  padding-block: 2rem;
}

.page-about__eyebrow {
  font-family: var(--font-data);
  font-size: 0.74rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin: 0 0 0.75rem;
}

.page-about img {
  max-width: 100%;
  height: auto;
}

/* 面包屑 */
.page-about__breadcrumb {
  padding-top: 1rem;
}

/* ===== 品牌英雄区 ===== */
.page-about__hero {
  padding-block: clamp(2.5rem, 7vw, 5rem) 2.5rem;
  border-bottom: 1px solid var(--color-border);
  position: relative;
}

.page-about__hero-inner {
  display: grid;
  gap: 2rem;
  align-items: center;
}

.page-about__hero h1 {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 5.5vw, 3.7rem);
  line-height: 1.1;
  margin: 0;
  color: var(--color-text);
  letter-spacing: 0.01em;
}

.page-about__hero-sub {
  margin-top: 0.4rem;
  font-family: var(--font-data);
  font-size: clamp(1rem, 2vw, 1.3rem);
  color: var(--color-data);
}

.page-about__hero-lead {
  max-width: 46em;
  margin-top: 1.5rem;
  color: var(--color-text-secondary);
  font-size: 1rem;
}

.page-about__hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(1rem, 3vw, 2.5rem);
  margin-top: 2rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--color-border);
}

.page-about__hero-stat {
  display: flex;
  flex-direction: column-reverse;
  gap: 0.15rem;
}

.page-about__stat-num {
  font-family: var(--font-data);
  font-size: clamp(1.5rem, 3vw, 2.4rem);
  font-weight: 700;
  color: var(--color-data);
  line-height: 1.1;
}

.page-about__stat-label {
  font-size: 0.78rem;
  color: var(--color-text-secondary);
}

.page-about__hero-figure {
  margin: 0;
  border: 1px solid var(--color-border);
  background: var(--color-bg-card);
}

.page-about__hero-figure figcaption,
.page-about__timeline-figure figcaption,
.page-about__team-figure figcaption {
  padding: 0.75rem 1rem;
  font-size: 0.78rem;
  color: var(--color-text-secondary);
  border-top: 1px solid var(--color-border);
  background: var(--color-bg-mid);
}

/* ===== 档案导读 ===== */
.page-about__contents {
  padding-block: 2.5rem 3rem;
  border-bottom: 1px solid var(--color-border);
}

.page-about__contents-list {
  display: grid;
  gap: 0.75rem;
  margin-top: 1.75rem;
}

.page-about__contents-item {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  padding: 1.1rem 1rem;
  background: var(--color-bg-mid);
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-accent);
  text-decoration: none;
  color: var(--color-text);
  transition: background-color 0.25s ease, border-color 0.25s ease, transform 0.2s ease;
}

.page-about__contents-num {
  font-family: var(--font-data);
  color: var(--color-accent);
  font-size: 1.05rem;
}

.page-about__contents-name {
  font-family: var(--font-heading);
  font-size: 1rem;
}

.page-about__contents-meta {
  font-size: 0.76rem;
  color: var(--color-text-secondary);
  font-family: var(--font-data);
}

/* ===== 品牌概况 ===== */
.page-about__overview {
  padding-block: 3rem;
}

.page-about__overview-grid {
  display: grid;
  gap: 2rem;
  align-items: start;
}

.page-about__overview-main p {
  color: var(--color-text-secondary);
  font-size: 0.96rem;
  margin-bottom: 1rem;
}

.page-about__overview-main strong {
  color: var(--color-text);
}

.page-about__overview-lead {
  font-size: 1.05rem;
  color: var(--color-text);
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 1.25rem;
}

.page-about__link {
  align-self: flex-start;
  text-decoration: none;
  margin-top: 0.5rem;
}

.page-about__aside {
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-accent);
  background: var(--color-bg-mid);
  padding: 1.25rem 1.25rem 1rem;
}

.page-about__aside-label {
  font-family: var(--font-data);
  font-size: 0.72rem;
  color: var(--color-accent);
  letter-spacing: 0.16em;
  margin: 0;
}

.page-about__aside-text {
  margin-top: 0.75rem;
  color: var(--color-text-secondary);
  font-size: 0.9rem;
}

.page-about__aside-index {
  margin-top: 1rem;
  font-family: var(--font-data);
  font-size: 0.74rem;
  color: var(--color-text-secondary);
}

.page-about__aside-cert {
  margin-top: 1rem;
  padding-top: 0.75rem;
  border-top: 1px dashed var(--color-border);
  font-family: var(--font-data);
  font-size: 0.72rem;
  color: var(--color-text-secondary);
}

/* ===== 服务范围 ===== */
.page-about__scope {
  padding-block: 3rem;
  background: var(--about-scope-bg);
  border-block: 1px solid var(--color-border);
}

.page-about .section-head--split {
  display: grid;
  gap: 1rem;
}

.page-about__scope-metrics {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.6rem;
}

.page-about__live {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-data);
  font-size: 0.74rem;
  color: var(--color-data);
  border: 1px solid rgba(57, 255, 20, 0.3);
  background: rgba(57, 255, 20, 0.06);
  padding: 0.35rem 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.page-about__live-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-data);
  box-shadow: 0 0 8px rgba(57, 255, 20, 0.7);
  animation: page-about-pulse 2s ease-out infinite;
}

@keyframes page-about-pulse {
  0%, 100% {
    opacity: 1;
    box-shadow: 0 0 8px rgba(57, 255, 20, 0.7);
  }
  50% {
    opacity: 0.5;
    box-shadow: 0 0 2px rgba(57, 255, 20, 0.3);
  }
}

.page-about__scope-grid {
  display: grid;
  gap: 1rem;
  margin-top: 2rem;
}

.page-about__league-card,
.page-about__feature-card,
.page-about__indicator-card {
  position: relative;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%);
}

.page-about__card-title {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  margin: 0;
  color: var(--color-text);
  letter-spacing: 0.02em;
}

.page-about__league-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.5rem 0.75rem;
}

.page-about__league-list li {
  font-family: var(--font-data);
  font-size: 0.88rem;
  padding: 0.5rem 0.65rem;
  background: rgba(57, 255, 20, 0.06);
  border: 1px solid var(--color-border);
  color: var(--color-text);
}

.page-about__note {
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  margin: 0;
}

.page-about__feature-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
}

.page-about__feature-list li {
  padding: 0.7rem 0;
  border-bottom: 1px solid rgba(42, 90, 74, 0.45);
}

.page-about__feature-name {
  display: block;
  font-weight: 700;
  color: var(--color-accent);
  font-size: 0.93rem;
}

.page-about__feature-desc {
  display: block;
  font-size: 0.82rem;
  color: var(--color-text-secondary);
  margin-top: 0.15rem;
}

.page-about__feature-desc a {
  color: var(--color-data);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about__indicator-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.5rem;
}

.page-about__indicator-item {
  font-family: var(--font-data);
  font-size: 0.8rem;
  padding: 0.55rem 0.6rem;
  background: var(--color-bg-dark);
  border-left: 2px solid var(--color-data);
  color: var(--color-text);
}

/* ===== 发展里程碑 ===== */
.page-about__milestones {
  padding-block: 3rem;
}

.page-about__timeline {
  position: relative;
  display: grid;
  gap: 1.5rem;
  margin-top: 2rem;
}

.page-about__timeline::before {
  content: "";
  position: absolute;
  left: 0.65rem;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--color-accent), var(--color-border));
}

.page-about__timeline-item {
  position: relative;
  padding-left: 2.5rem;
}

.page-about__timeline-year {
  font-family: var(--font-data);
  font-weight: 700;
  color: var(--color-accent);
  font-size: 1.1rem;
}

.page-about__timeline-dot {
  position: absolute;
  left: 0;
  top: 0.4rem;
  width: 1.3rem;
  height: 1.3rem;
  border-radius: 50%;
  background: var(--color-bg-dark);
  border: 3px solid var(--color-accent);
  box-shadow: 0 0 0 4px rgba(255, 193, 7, 0.16);
}

.page-about__timeline-content h3 {
  margin: 0.25rem 0 0.3rem;
  font-family: var(--font-heading);
  font-size: 1rem;
  color: var(--color-text);
}

.page-about__timeline-content p {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  margin: 0;
}

.page-about__timeline-figure {
  margin-top: 2rem;
}

.page-about__timeline-figure .img-frame {
  margin: 0;
  border: 1px solid var(--color-border);
}

.page-about__milestones-note {
  margin-top: 1.5rem;
  font-size: 0.85rem;
  color: var(--color-text-secondary);
}

.page-about__milestones-note a {
  color: var(--color-accent);
}

/* ===== 团队与组织 ===== */
.page-about__team {
  padding-block: 3rem;
  background: var(--color-bg-mid);
  border-block: 1px solid var(--color-border);
}

.page-about__team-headcount {
  font-family: var(--font-data);
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  display: flex;
  align-items: baseline;
  gap: 0.4rem;
}

.page-about__team-headcount .page-about__stat-num {
  font-size: 1.4rem;
}

.page-about__team-grid {
  display: grid;
  gap: 1rem;
  margin-top: 2rem;
}

.page-about__team-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  transition: transform 0.2s ease, border-color 0.2s ease;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%);
}

.page-about__team-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-accent);
}

.page-about__team-icon {
  font-size: 1.6rem;
  color: var(--color-data);
  line-height: 1;
}

.page-about__team-card h3 {
  font-family: var(--font-heading);
  font-size: 1rem;
  margin: 0;
  color: var(--color-text);
}

.page-about__team-card p {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  margin: 0;
}

.page-about__team-bottom {
  display: grid;
  gap: 2rem;
  margin-top: 2.5rem;
  align-items: center;
}

.page-about__team-figure {
  margin: 0;
  border: 1px solid var(--color-border);
}

.page-about__team-text h3 {
  font-family: var(--font-heading);
  font-size: 1.35rem;
  margin: 0 0 0.75rem;
  color: var(--color-text);
}

.page-about__team-text p {
  color: var(--color-text-secondary);
  font-size: 0.92rem;
  margin-bottom: 1rem;
}

/* ===== 数据理念 ===== */
.page-about__philosophy {
  padding-block: 3rem;
}

.page-about__philosophy-grid {
  display: grid;
  gap: 2rem;
  margin-top: 2rem;
  align-items: start;
}

.page-about__philosophy-copy p {
  color: var(--color-text-secondary);
  margin-bottom: 1rem;
  font-size: 0.96rem;
}

.page-about__philosophy-copy strong {
  color: var(--color-text);
}

.page-about__philosophy-quote {
  border-left: 4px solid var(--color-accent);
  padding-left: 1rem;
  font-family: var(--font-data);
  font-size: 0.9rem;
  color: var(--color-text);
}

.page-about__philosophy-panel {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.page-about__flow-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.65rem;
}

.page-about__flow-list li {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.85rem;
  color: var(--color-text);
}

.page-about__flow-step {
  font-family: var(--font-data);
  color: var(--color-data);
  font-size: 0.78rem;
  background: rgba(57, 255, 20, 0.08);
  padding: 0.2rem 0.45rem;
  border: 1px solid rgba(57, 255, 20, 0.3);
}

.page-about__philosophy-chart {
  margin-top: 2.5rem;
  background: var(--color-bg-mid);
  border: 1px solid var(--color-border);
  padding: 1.5rem;
}

.page-about__bar-chart {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0.75rem;
  align-items: end;
  min-height: 200px;
  margin-top: 1rem;
}

.page-about__bar-chart .data-chart__bar {
  display: flex;
  flex-direction: column-reverse;
  justify-content: flex-end;
  align-items: center;
  gap: 0.4rem;
}

.page-about__bar-chart .data-chart__bar span {
  font-size: 0.72rem;
  font-family: var(--font-data);
  color: var(--color-text-secondary);
  white-space: nowrap;
  text-align: center;
}

/* ===== 信任声明 ===== */
.page-about__trust {
  border-top: 1px solid var(--color-border);
  background: var(--color-bg-dark);
  padding: 2rem 0 2.5rem;
}

.page-about__trust p {
  max-width: 56em;
  margin: 0;
  color: var(--color-text-secondary);
  font-size: 0.92rem;
  border-left: 3px solid var(--color-accent);
  padding-left: 1rem;
}

/* ===== 响应式 ===== */
@media (min-width: 640px) {
  .page-about__contents-list {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-about__scope-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-about__league-card,
  .page-about__indicator-card {
    min-height: 100%;
  }

  .page-about__team-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-about__philosophy-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  }
}

@media (min-width: 900px) {
  .page-about__hero-inner {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  }

  .page-about__contents-list {
    grid-template-columns: repeat(5, 1fr);
  }

  .page-about__contents-item {
    padding: 1.25rem 1rem;
  }

  .page-about__overview-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 300px);
  }

  .page-about .section-head--split {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: end;
  }

  .page-about__scope-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.2fr) minmax(0, 1fr);
  }

  .page-about__timeline {
    display: grid;
    grid-template-columns: repeat(6, minmax(170px, 1fr));
    overflow-x: auto;
    padding-bottom: 0.5rem;
    gap: 1rem;
    align-items: start;
  }

  .page-about__timeline::before {
    left: 0;
    right: 0;
    top: 0.65rem;
    bottom: auto;
    width: auto;
    height: 2px;
    background: linear-gradient(90deg, var(--color-accent), var(--color-border));
  }

  .page-about__timeline-item {
    padding: 0 0.5rem 0;
  }

  .page-about__timeline-year {
    display: block;
    font-size: 1.05rem;
  }

  .page-about__timeline-dot {
    top: 0.58rem;
    left: 0.5rem;
  }

  .page-about__timeline-content {
    margin-top: 1.4rem;
  }

  .page-about__team-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .page-about__team-bottom {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  }
}

@media (min-width: 1200px) {
  .page-about__hero {
    padding-block: 4.5rem 3rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about__live-dot {
    animation: none;
  }

  .page-about__team-card:hover {
    transform: none;
  }

  .page-about__contents-item,
  .page-about__team-card {
    transition: none;
  }
}