.page-about {
  background: var(--paper);
  color: var(--text);
  padding-bottom: 96px;
}

.page-about .container {
  padding-top: 0;
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumb {
  padding: 32px 0 0;
}

.page-about .breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.02em;
  color: var(--cold);
}

.page-about .breadcrumbs a {
  color: var(--ink-500);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .breadcrumbs a:hover,
.page-about .breadcrumbs a:focus-visible {
  color: var(--ink-900);
  border-bottom-color: var(--signal);
}

.page-about .breadcrumbs li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--line);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: 24px 0 56px;
  border-bottom: 1px solid var(--line);
}

.page-about .about-kicker {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--signal);
}

.page-about h1 {
  margin: 14px 0 20px;
  font-size: clamp(30px, 4.4vw, 48px);
  line-height: 1.15;
  letter-spacing: -0.01em;
  font-weight: 900;
  color: var(--ink-900);
  max-width: 22ch;
  overflow-wrap: break-word;
}

.page-about .about-lead {
  margin: 0;
  max-width: 40em;
  font-size: 17px;
  line-height: 1.75;
  color: var(--ink-700);
}

.page-about .about-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 40px 0 0;
  padding: 0;
  background: var(--line);
  border: 1px solid var(--line);
  list-style: none;
}

.page-about .about-fact {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 18px 18px 20px;
  background: var(--white);
}

.page-about .about-fact dt {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.02em;
  color: var(--cold);
}

.page-about .about-fact dd {
  margin: 0;
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--ink-900);
}

/* ---------- 目录导航 ---------- */
.page-about .about-index {
  padding: 22px 0 0;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-index ol {
  display: flex;
  gap: 22px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
}

.page-about .about-index a {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 4px 0;
  white-space: nowrap;
  text-decoration: none;
  font-size: 14px;
  color: var(--cold);
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-index a .mono {
  font-size: 12px;
  color: var(--signal);
}

.page-about .about-index a:hover,
.page-about .about-index a:focus-visible {
  color: var(--ink-900);
  border-bottom-color: var(--signal);
}

/* ---------- 章节骨架 ---------- */
.page-about .about-sec {
  padding: 72px 0;
  border-bottom: 1px solid var(--line);
  scroll-margin-top: 80px;
}

.page-about .about-sec:last-of-type {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-about .sec-head {
  margin-bottom: 32px;
  max-width: 48em;
}

.page-about .sec-num {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--signal);
}

.page-about .sec-head h2 {
  margin: 0;
  font-size: clamp(21px, 2.6vw, 30px);
  line-height: 1.3;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--ink-900);
}

.page-about .about-body p,
.page-about .net-intro,
.page-about .team-copy > p,
.page-about .eco-card p,
.page-about .cred-item p {
  margin: 0 0 20px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--text);
  max-width: 40em;
}

.page-about .about-body p:last-child,
.page-about .eco-card p:last-child,
.page-about .cred-item p:last-child {
  margin-bottom: 0;
}

/* ---------- 01 业务与客户 ---------- */
.page-about .about-cols {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 32px;
}

.page-about .about-aside {
  background: var(--white);
  border: 1px solid var(--line);
  border-top: 2px solid var(--ink-900);
  padding: 22px 20px 24px;
}

.page-about .aside-title {
  margin: 0 0 18px;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--cold);
}

.page-about .scene-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 18px;
}

.page-about .scene-list li {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  gap: 12px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
}

.page-about .scene-list li:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-about .scene-id {
  font-size: 12px;
  color: var(--signal);
  padding-top: 3px;
}

.page-about .scene-list h3 {
  margin: 0 0 4px;
  font-size: 15px;
  font-weight: 700;
  color: var(--ink-900);
}

.page-about .scene-list p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--cold);
}

/* ---------- 图片基础 ---------- */
.page-about .figure {
  margin: 0;
}

.page-about .figure-media {
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--blue-050);
}

.page-about .figure-media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
}

.page-about .figure-caption {
  margin: 12px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--cold);
}

/* ---------- 02 时间线 ---------- */
.page-about .tl-figure {
  margin-bottom: 8px;
}

.page-about .timeline {
  margin: 40px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-about .tl-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
  padding: 26px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .tl-mark {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-family: var(--font-mono);
}

.page-about .tl-year {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--ink-900);
}

.page-about .tl-q {
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--signal);
}

.page-about .tl-item--now .tl-year {
  color: var(--signal);
}

.page-about .tl-body h3 {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--ink-900);
}

.page-about .tl-body > p {
  margin: 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--text);
  max-width: 40em;
}

.page-about .tl-more {
  margin: 10px 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--signal-050);
  font-size: 14px;
  line-height: 1.75;
  color: var(--cold);
  max-width: 38em;
}

@media (hover: hover) and (pointer: fine) {
  .page-about .tl-more {
    max-height: 0;
    margin-top: 0;
    overflow: hidden;
    opacity: 0;
    border-left-color: transparent;
    transition: max-height 220ms var(--ease), opacity 160ms var(--ease),
      margin-top 220ms var(--ease), border-left-color 160ms var(--ease);
  }

  .page-about .tl-item:hover .tl-more,
  .page-about .tl-item:focus-within .tl-more {
    max-height: 12em;
    margin-top: 10px;
    opacity: 1;
    border-left-color: var(--signal-050);
  }
}

/* ---------- 03 团队 ---------- */
.page-about .team-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 32px;
}

.page-about .role-list {
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}

.page-about .role-list li {
  display: grid;
  grid-template-columns: 58px minmax(0, 1fr);
  gap: 14px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .role-id {
  font-size: 12px;
  padding-top: 3px;
  color: var(--signal);
}

.page-about .role-list h3 {
  margin: 0 0 4px;
  font-size: 15px;
  font-weight: 700;
  color: var(--ink-900);
}

.page-about .role-list p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--cold);
}

/* ---------- 04 服务网络 ---------- */
.page-about .net-intro {
  margin-bottom: 28px;
}

.page-about .net-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0 0 32px;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .net-stats li {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 16px 18px 18px;
  background: var(--white);
}

.page-about .net-key {
  font-size: 12px;
  letter-spacing: 0.02em;
  color: var(--cold);
}

.page-about .net-stats strong {
  font-size: 19px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--ink-900);
}

.page-about .net-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 32px;
}

.page-about .growth {
  display: block;
  width: 100%;
  height: auto;
  background: var(--white);
  border: 1px solid var(--line);
}

.page-about .growth .g-axis {
  stroke: var(--line);
  stroke-width: 1;
}

.page-about .growth .g-grid {
  stroke: var(--line);
  stroke-width: 1;
  stroke-dasharray: 4 5;
}

.page-about .growth .g-line {
  fill: none;
  stroke: var(--ink-500);
  stroke-width: 2.5;
  stroke-linejoin: round;
  stroke-linecap: round;
}

.page-about .growth .g-dot {
  fill: var(--paper);
  stroke: var(--ink-500);
  stroke-width: 2;
}

.page-about .growth .g-dot--now {
  fill: var(--signal);
  stroke: var(--paper);
  stroke-width: 2;
}

/* ---------- 05 资质 ---------- */
.page-about .cred-list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-about .cred-item {
  position: relative;
  padding: 24px 0 24px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .cred-check {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  margin-right: 8px;
  vertical-align: middle;
  border-radius: 50%;
  background: var(--signal-050);
  color: var(--confirm);
}

.page-about .cred-id {
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--signal);
  vertical-align: middle;
}

.page-about .cred-item h3 {
  margin: 14px 0 10px;
  font-size: 18px;
  font-weight: 800;
  color: var(--ink-900);
}

.page-about .cred-item p {
  margin-bottom: 0;
}

/* ---------- 06 合作生态 ---------- */
.page-about .eco-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
}

.page-about .eco-card {
  padding: 24px 22px 26px;
  background: var(--white);
  border: 1px solid var(--line);
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-about .eco-card:hover {
  border-color: var(--ink-500);
  background: var(--blue-050);
}

.page-about .eco-id {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--signal);
}

.page-about .eco-card h3 {
  margin: 0 0 12px;
  font-size: 18px;
  font-weight: 800;
  color: var(--ink-900);
}

.page-about .about-cta {
  margin-top: 36px;
  padding: 28px 24px 30px;
  background: var(--ink-900);
  color: var(--white);
}

.page-about .about-cta p {
  margin: 0 0 22px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--blue-050);
  max-width: 46em;
}

.page-about .cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .cta-actions .btn {
  text-decoration: none;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .about-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-fact {
    padding: 22px 22px 24px;
  }

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

  .page-about .eco-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 24px;
  }

  .page-about .cred-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0 32px;
    border-top: 1px solid var(--line);
  }

  .page-about .cred-item {
    padding: 24px 0 26px;
  }
}

@media (min-width: 900px) {
  .page-about .about-cols {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 56px;
  }

  .page-about .team-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 48px;
    align-items: start;
  }

  .page-about .net-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 32px;
    align-items: start;
  }

  .page-about .tl-item {
    grid-template-columns: 168px minmax(0, 1fr);
    gap: 40px;
    padding: 30px 0;
  }

  .page-about .tl-mark {
    position: relative;
    padding-left: 18px;
  }

  .page-about .tl-mark::before {
    content: "";
    position: absolute;
    left: 0;
    top: 6px;
    bottom: 6px;
    width: 2px;
    background: var(--line);
    transition: background-color var(--dur) var(--ease);
  }

  .page-about .tl-item:hover .tl-mark::before,
  .page-about .tl-item:focus-within .tl-mark::before {
    background: var(--signal);
  }

  .page-about .tl-item--now .tl-mark::before {
    background: var(--signal);
  }
}

@media (min-width: 1024px) {
  .page-about {
    padding-bottom: 120px;
  }

  .page-about .about-sec {
    padding: 88px 0;
  }
}
<<<END>>>