.page-about {
  --about-rail-top: 92px;
  --about-axis: var(--accent-cyan);
  --about-fade: rgba(43, 227, 210, 0.08);
}

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

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

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  padding-top: clamp(1rem, 3.5vw, 2.25rem);
  padding-bottom: clamp(2rem, 5vw, 3.25rem);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.5rem, 4vw, 2.75rem);
}

.page-about .about-hero__title {
  margin: 0.7rem 0 0;
  font-size: clamp(1.85rem, 6vw, 3.35rem);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.025em;
  color: var(--text-primary);
}

.page-about .about-hero__intro {
  margin: 1rem 0 0;
  max-width: 40ch;
  font-size: 0.975rem;
  line-height: 1.78;
  color: var(--text-body);
}

.page-about .about-hero__media {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--bg-panel);
}

.page-about .about-kpis {
  margin-top: clamp(1.75rem, 4vw, 2.75rem);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.page-about .about-kpi {
  background: var(--bg-panel);
  padding: 0.95rem 1rem 1.05rem;
}

.page-about .about-kpi__num {
  display: block;
  font-family: var(--font-numeric);
  font-size: clamp(1.5rem, 6vw, 2.35rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.03em;
  color: var(--accent-cyan);
}

.page-about .about-kpi__label {
  display: block;
  margin-top: 0.35rem;
  font-size: 0.78rem;
  line-height: 1.45;
  color: var(--text-dim);
}

/* ---------- 主体：左轴 + 右流 ---------- */

.page-about .about-body__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.75rem, 5vw, 3rem);
}

.page-about .about-rail__inner {
  padding: 1.15rem 1.1rem 1.35rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: linear-gradient(158deg, var(--bg-panel) 0%, var(--bg-deep) 100%);
}

.page-about .about-rail .filter-bar {
  margin-top: 0.8rem;
}

.page-about .about-timeline {
  position: relative;
  list-style: none;
  margin: 1.15rem 0 0;
  padding: 0;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 0.55rem;
  bottom: 0.95rem;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--accent-cyan) 0%, var(--about-fade) 100%);
}

.page-about .about-timeline__item {
  position: relative;
  padding-left: 1.55rem;
  padding-bottom: 1rem;
  transition: opacity 180ms var(--ease);
}

.page-about .about-timeline__item:last-child {
  padding-bottom: 0;
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 7px;
  width: 10px;
  height: 10px;
  box-sizing: border-box;
  border-radius: 50%;
  background: var(--bg-deep);
  border: 2px solid var(--state-green);
}

.page-about .about-timeline__link {
  display: block;
  text-decoration: none;
  color: inherit;
  border-radius: var(--radius-sm);
}

.page-about .about-timeline__link:focus-visible {
  outline: 2px solid var(--accent-cyan);
  outline-offset: 3px;
}

.page-about .about-timeline__year {
  display: block;
  font-family: var(--font-numeric);
  font-size: 1.05rem;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: 0.02em;
  color: var(--accent-cyan);
}

.page-about .about-timeline__title {
  display: block;
  margin-top: 0.15rem;
  font-size: 0.82rem;
  line-height: 1.55;
  color: var(--text-dim);
  transition: color 180ms var(--ease);
}

.page-about .about-timeline__link:hover .about-timeline__title,
.page-about .about-timeline__link:focus-visible .about-timeline__title {
  color: var(--text-primary);
}

/* ---------- 右流区块 ---------- */

.page-about .about-block {
  padding-bottom: clamp(2rem, 5vw, 3.25rem);
  margin-bottom: clamp(2rem, 5vw, 3.25rem);
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-block:last-child {
  padding-bottom: 0;
  margin-bottom: 0;
  border-bottom: none;
}

.page-about .about-block__no {
  display: block;
  margin-bottom: 0.35rem;
  font-family: var(--font-numeric);
  font-size: clamp(2.4rem, 9vw, 4.4rem);
  font-weight: 700;
  line-height: 0.88;
  letter-spacing: -0.045em;
  color: rgba(43, 227, 210, 0.24);
}

.page-about .about-block__title {
  margin: 0 0 0.85rem;
  font-size: clamp(1.28rem, 3.8vw, 1.85rem);
  font-weight: 800;
  line-height: 1.24;
  letter-spacing: -0.022em;
  color: var(--text-primary);
}

.page-about .about-block .prose {
  margin: 0 0 0.9rem;
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--text-body);
}

.page-about .about-block .prose:last-child {
  margin-bottom: 0;
}

.page-about .about-sub {
  margin: 2rem 0 0.85rem;
  font-size: 1.02rem;
  font-weight: 700;
  letter-spacing: -0.012em;
  color: var(--text-primary);
}

.page-about .about-sub::before {
  content: "";
  display: block;
  width: 42px;
  height: 2px;
  margin-bottom: 0.6rem;
  background: var(--accent-cyan);
  border-radius: 2px;
}

/* 团队三条线 */

.page-about .about-team {
  margin: 1.1rem 0 1.2rem;
}

.page-about .about-team .index-list__meta {
  margin: 0.3rem 0 0;
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--text-body);
}

.page-about .about-team__media,
.page-about .about-partners__media {
  margin: 1.35rem 0 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--bg-panel);
}

/* 数据加工四步 */

.page-about .about-pipeline {
  list-style: none;
  margin: 1.2rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.8rem;
}

.page-about .about-pipeline li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.7rem;
  align-items: baseline;
}

.page-about .about-pipeline b {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  white-space: nowrap;
  padding: 0.16rem 0.55rem;
  border-radius: 999px;
  border: 1px solid rgba(43, 227, 210, 0.35);
  color: var(--accent-cyan);
}

.page-about .about-pipeline li:nth-child(2) b {
  border-color: rgba(124, 92, 255, 0.4);
  color: var(--state-purple);
}

.page-about .about-pipeline li:nth-child(3) b {
  border-color: rgba(56, 193, 114, 0.4);
  color: var(--state-green);
}

.page-about .about-pipeline li:nth-child(4) b {
  border-color: rgba(255, 106, 26, 0.45);
  color: var(--accent-orange);
}

.page-about .about-pipeline span {
  font-size: 0.885rem;
  line-height: 1.72;
  color: var(--text-body);
}

/* 覆盖范围坐标点阵 */

.page-about .about-coord {
  display: grid;
  grid-template-columns: repeat(13, minmax(0, 1fr));
  gap: 6px;
  max-width: 340px;
  margin: 1.3rem 0 0.5rem;
}

.page-about .about-coord span {
  display: block;
  aspect-ratio: 1 / 1;
  border-radius: 50%;
  background: var(--line);
}

.page-about .about-coord span:nth-child(3n) {
  background: var(--accent-cyan);
  opacity: 0.5;
}

.page-about .about-coord span:nth-child(5n) {
  background: var(--state-green);
  opacity: 0.45;
}

.page-about .about-coord span:nth-child(7n) {
  background: var(--accent-orange);
  opacity: 0.4;
}

/* 栏目分组 */

.page-about .about-cols {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.1rem;
}

.page-about .about-col {
  padding-left: 0.9rem;
  border-left: 2px solid var(--line);
}

.page-about .about-col:nth-child(1) { border-left-color: var(--accent-cyan); }
.page-about .about-col:nth-child(2) { border-left-color: var(--state-purple); }
.page-about .about-col:nth-child(3) { border-left-color: var(--state-green); }
.page-about .about-col:nth-child(4) { border-left-color: var(--accent-orange); }

.page-about .about-col__title {
  margin: 0;
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text-primary);
}

.page-about .about-col__list {
  list-style: none;
  margin: 0.55rem 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.page-about .about-col__list li {
  font-size: 0.775rem;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--bg-deep);
  color: var(--text-dim);
}

/* 更新节奏 */

.page-about .about-cycles {
  list-style: none;
  margin: 1.2rem 0 0;
  padding: 0;
}

.page-about .about-cycle {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.8rem;
  padding: 1rem 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .about-cycle:first-child {
  border-top-color: var(--line);
}

.page-about .about-cycle .status-dot {
  margin-top: 0.42rem;
}

.page-about .about-cycle__title {
  margin: 0 0 0.3rem;
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text-primary);
}

.page-about .about-cycle__body p {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.75;
  color: var(--text-body);
}

/* 服务与支持 */

.page-about .about-support {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.9rem;
  margin: 1.35rem 0 1.15rem;
}

.page-about .about-support__item {
  padding: 0.85rem 1rem;
  border-radius: var(--radius-md);
  background: var(--bg-panel);
  border: 1px solid var(--line);
}

.page-about .about-support__label {
  display: block;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--text-dim);
}

.page-about .about-support__value {
  display: block;
  margin-top: 0.3rem;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--accent-cyan);
  word-break: break-all;
}

.page-about .about-support__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-top: 1.2rem;
}

/* ---------- 响应式 ---------- */

@media (min-width: 640px) {
  .page-about .about-support {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-cols {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.35rem 1.6rem;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
    align-items: end;
  }

  .page-about .about-kpis {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-team__media {
    width: calc(100% + 3rem);
    margin-right: -3rem;
  }
}

@media (min-width: 1024px) {
  .page-about .about-body__grid {
    grid-template-columns: minmax(250px, 4fr) minmax(0, 7fr);
    align-items: start;
    gap: clamp(2rem, 4vw, 3.5rem);
  }

  .page-about .about-rail {
    position: sticky;
    top: var(--about-rail-top);
    align-self: start;
  }

  .page-about .about-hero__intro {
    font-size: 1rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-timeline__item,
  .page-about .about-timeline__title {
    transition: none;
  }
}
<<<END>>>