.page-about {
  --about-line: rgba(92, 111, 134, 0.34);
  --about-line-strong: rgba(58, 242, 255, 0.55);
  --about-wash: rgba(28, 105, 212, 0.16);
  --about-card: #0d1c2d;
  --about-card-hover: #10253c;
}

.page-about .breadcrumbs {
  padding: 2px 0 20px;
}

.page-about a:focus-visible,
.page-about .tl-card:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  display: grid;
  gap: 26px;
  padding: clamp(26px, 5vw, 60px);
  border-radius: var(--r-lg);
  border: 1px solid rgba(58, 242, 255, 0.18);
  background:
    radial-gradient(120% 150% at 90% -10%, rgba(58, 242, 255, 0.2), transparent 58%),
    linear-gradient(152deg, rgba(28, 105, 212, 0.42) 0%, rgba(14, 59, 122, 0.32) 42%, rgba(11, 23, 38, 0.96) 100%);
  box-shadow: var(--shadow-deep);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(159, 176, 196, 0.12) 1px, transparent 1px),
    linear-gradient(90deg, rgba(159, 176, 196, 0.12) 1px, transparent 1px);
  background-size: 52px 52px;
  -webkit-mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.65), transparent 74%);
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.65), transparent 74%);
  pointer-events: none;
}

.page-about .about-hero__body {
  position: relative;
  z-index: 1;
}

.page-about .about-hero .page-title {
  max-width: 20em;
  margin: 10px 0 0;
  color: var(--mist);
  line-height: 1.16;
}

.page-about .about-hero .lede {
  max-width: 54em;
  margin-top: 18px;
  color: var(--cool);
}

.page-about .about-hero__facts {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  gap: 12px 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-hero__facts li {
  display: flex;
  flex-direction: column;
  gap: 3px;
  min-width: 104px;
  padding: 10px 16px 10px 14px;
  border-radius: var(--r-sm);
  border: 1px solid rgba(159, 176, 196, 0.22);
  border-left: 3px solid var(--bmw);
  background: rgba(5, 11, 20, 0.5);
}

.page-about .about-hero__num {
  font-size: 20px;
  color: var(--mist);
  line-height: 1.1;
}

.page-about .about-hero__label {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--cool);
}

/* ---------- 章节骨架 ---------- */
.page-about .about-chapter {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  margin-top: clamp(46px, 7vw, 92px);
}

.page-about .chapter-rail {
  display: flex;
  align-items: baseline;
  gap: 12px;
}

.page-about .chapter-rail__num {
  font-size: 30px;
  line-height: 1;
  color: var(--bmw);
  letter-spacing: 0.02em;
}

.page-about .chapter-rail__label {
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--cool);
}

.page-about .chapter-body {
  min-width: 0;
}

.page-about .chapter-title {
  margin: 0 0 14px;
  font-family: var(--font-cn);
  font-weight: 800;
  font-size: clamp(26px, 3.6vw, 40px);
  line-height: 1.24;
  letter-spacing: -0.02em;
  color: var(--mist);
}

.page-about .chapter-lede {
  max-width: 46em;
  margin: 0 0 22px;
  color: var(--cool);
  font-size: 16px;
  line-height: 1.75;
}

.page-about .inline-link {
  color: var(--cyan);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.page-about .inline-link:hover {
  color: var(--mist);
}

/* ---------- 01 起点 ---------- */
.page-about .origin-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
}

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

.page-about .about-figure .media-frame {
  border-radius: var(--r-md);
  overflow: hidden;
  border: 1px solid var(--about-line);
  background: var(--panel);
}

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

.page-about .about-figure .media-frame__caption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--steel);
}

.page-about .about-stats {
  margin-top: 26px;
}

.page-about .about-stats .stat {
  border-radius: var(--r-md);
  border: 1px solid var(--about-line);
  background: linear-gradient(160deg, rgba(28, 105, 212, 0.2), rgba(11, 23, 38, 0.92));
  padding: 18px;
}

.page-about .about-stats .stat__value {
  color: var(--mist);
  font-size: clamp(22px, 2.6vw, 30px);
}

.page-about .about-stats .stat__label {
  color: var(--cool);
  font-size: 13px;
  letter-spacing: 0.06em;
}

/* ---------- 02 时间轴 ---------- */
.page-about .timeline {
  position: relative;
  margin: 0;
  padding: 4px 0 0 26px;
  list-style: none;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 14px;
  bottom: 14px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(to bottom, var(--cyan), var(--bmw) 46%, rgba(28, 105, 212, 0.12));
}

.page-about .timeline__item {
  position: relative;
  margin-bottom: 16px;
}

.page-about .timeline__dot {
  position: absolute;
  left: -25px;
  top: 22px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--cyan);
  box-shadow: 0 0 0 4px rgba(58, 242, 255, 0.12);
}

.page-about .tl-card {
  padding: 18px 20px;
  border-radius: var(--r-md);
  border: 1px solid var(--about-line);
  background: var(--about-card);
  transition: border-color 0.22s var(--ease), background 0.22s var(--ease), transform 0.22s var(--ease);
}

.page-about .tl-card:hover,
.page-about .tl-card:focus-within {
  border-color: var(--about-line-strong);
  background: var(--about-card-hover);
  transform: translateY(-2px);
}

.page-about .tl-card__meta {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--cyan);
}

.page-about .tl-card__title {
  margin: 8px 0 8px;
  font-size: 20px;
  font-weight: 700;
  line-height: 1.35;
  color: var(--mist);
}

.page-about .tl-card__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--cool);
}

.page-about .tl-card__more {
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transition: max-height 0.28s var(--ease), opacity 0.24s var(--ease), margin-top 0.24s var(--ease);
}

.page-about .tl-card__more p {
  margin: 0;
  padding-top: 12px;
  border-top: 1px solid var(--about-line);
  font-size: 15px;
  line-height: 1.72;
  color: var(--cool);
}

.page-about .tl-card:hover .tl-card__more,
.page-about .tl-card:focus-within .tl-card__more {
  max-height: 320px;
  opacity: 1;
  margin-top: 12px;
}

/* ---------- 03 团队 ---------- */
.page-about .team-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
  align-items: start;
}

.page-about .team-visual {
  padding: 20px;
  border-radius: var(--r-lg);
  border: 1px solid var(--about-line);
  background: radial-gradient(110% 120% at 20% 0%, rgba(28, 105, 212, 0.28), rgba(11, 23, 38, 0.96) 68%);
}

.page-about .team-ring {
  display: block;
  width: 100%;
  max-width: 240px;
  margin: 0 auto;
  height: auto;
}

.page-about .team-ring__track {
  fill: none;
  stroke: rgba(92, 111, 134, 0.28);
  stroke-width: 22;
}

.page-about .team-ring__seg {
  fill: none;
  stroke-width: 22;
  transform: rotate(-90deg);
  transform-origin: 100px 100px;
  transition: stroke-width 0.2s var(--ease);
}

.page-about .team-ring__seg--edit {
  stroke: var(--bmw);
}

.page-about .team-ring__seg--tech {
  stroke: var(--cyan);
}

.page-about .team-ring__seg--cs {
  stroke: var(--orange);
}

.page-about .team-ring:hover .team-ring__seg {
  stroke-width: 26;
}

.page-about .team-ring__center {
  fill: var(--mist);
  font-family: var(--font-en);
  font-size: 15px;
  font-weight: 700;
}

.page-about .team-ring__center--sub {
  fill: var(--cool);
  font-size: 12px;
  font-weight: 500;
  font-family: var(--font-cn);
  letter-spacing: 0.1em;
}

.page-about .team-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
  font-size: 13px;
  color: var(--cool);
}

.page-about .team-legend li {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.page-about .team-legend__dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
}

.page-about .team-legend__dot--edit {
  background: var(--bmw);
}

.page-about .team-legend__dot--tech {
  background: var(--cyan);
}

.page-about .team-legend__dot--cs {
  background: var(--orange);
}

.page-about .team-panel__intro {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.72;
  color: var(--cool);
}

.page-about .team-panel .tabpanel {
  padding-top: 14px;
}

.page-about .team-panel__title {
  margin: 0 0 10px;
  font-size: 19px;
  font-weight: 700;
  color: var(--mist);
}

.page-about .team-panel .tabpanel p {
  margin: 0 0 12px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--cool);
}

.page-about .team-list {
  margin: 0;
  padding-left: 18px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--cool);
}

.page-about .team-list li::marker {
  color: var(--cyan);
}

.page-about .about-figure--wide {
  margin-top: 28px;
}

/* ---------- 04 合作生态 ---------- */
.page-about .eco-wrap {
  padding: 14px 8px;
  border-radius: var(--r-lg);
  border: 1px solid var(--about-line);
  background: radial-gradient(120% 130% at 50% 0%, rgba(14, 59, 122, 0.5), rgba(5, 11, 20, 0.96) 72%);
}

.page-about .eco-map {
  display: block;
  width: 100%;
  max-width: 620px;
  margin: 0 auto;
  height: auto;
}

.page-about .eco-link {
  stroke: rgba(159, 176, 196, 0.32);
  stroke-width: 1.6;
  stroke-dasharray: 5 7;
}

.page-about .eco-core circle {
  fill: var(--bmw);
  stroke: rgba(58, 242, 255, 0.5);
  stroke-width: 2;
}

.page-about .eco-core text {
  fill: var(--mist);
  font-family: var(--font-cn);
  font-size: 14px;
  font-weight: 700;
}

.page-about .eco-core__sub {
  fill: rgba(244, 248, 255, 0.72);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.06em;
}

.page-about .eco-node circle {
  fill: rgba(11, 23, 38, 0.94);
  stroke: rgba(159, 176, 196, 0.42);
  stroke-width: 1.6;
  transition: stroke 0.2s var(--ease), fill 0.2s var(--ease);
}

.page-about .eco-node text {
  fill: var(--mist);
  font-family: var(--font-en);
  font-size: 14px;
  font-weight: 700;
}

.page-about .eco-node__sub {
  fill: var(--cool);
  font-family: var(--font-cn);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.04em;
}

.page-about .eco-node:hover circle,
.page-about .eco-node:focus-within circle {
  stroke: var(--cyan);
  fill: rgba(28, 105, 212, 0.42);
}

.page-about .eco-copy {
  margin-top: 22px;
}

.page-about .eco-copy p {
  color: var(--cool);
}

/* ---------- 05 服务能力 ---------- */
.page-about .about-quality {
  margin-top: 6px;
}

.page-about .about-quality .card {
  border-radius: var(--r-md);
  border: 1px solid var(--about-line);
  background: var(--about-card);
  padding: 18px;
}

.page-about .about-quality .card__title {
  color: var(--mist);
  font-size: 17px;
}

.page-about .about-quality .card__meta {
  color: var(--cyan);
  font-size: 12px;
  letter-spacing: 0.08em;
}

.page-about .about-quality .card__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--cool);
}

.page-about .callout {
  margin-top: 22px;
}

.page-about .quality-tail {
  margin: 18px 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--cool);
}

/* ---------- 06 联系 ---------- */
.page-about .about-figure--first {
  margin: 0 0 24px;
}

.page-about .contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.page-about .contact-card {
  padding: 18px;
  border-radius: var(--r-md);
  border: 1px solid var(--about-line);
  border-top: 3px solid var(--orange);
  background: var(--about-card);
}

.page-about .contact-card__key {
  display: block;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--cool);
}

.page-about .contact-card__value {
  display: block;
  margin-top: 8px;
  font-size: 17px;
  line-height: 1.4;
  color: var(--mist);
  word-break: break-word;
}

.page-about .contact-card p {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--cool);
}

.page-about .contact-note {
  margin: 20px 0 18px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--cool);
}

/* ---------- 结尾导航 ---------- */
.page-about .about-next {
  margin-top: clamp(48px, 7vw, 90px);
  padding-top: 26px;
  border-top: 1px solid var(--about-line);
}

.page-about .about-next__title {
  margin: 0;
  font-size: clamp(22px, 2.6vw, 28px);
  font-weight: 700;
  color: var(--mist);
}

.page-about .about-next__links {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-top: 18px;
}

.page-about .about-next__link {
  display: block;
  padding: 18px 20px;
  border-radius: var(--r-md);
  border: 1px solid var(--about-line);
  background: linear-gradient(158deg, var(--about-wash), rgba(11, 23, 38, 0.94));
  text-decoration: none;
  transition: border-color 0.2s var(--ease), transform 0.2s var(--ease);
}

.page-about .about-next__link:hover {
  border-color: var(--about-line-strong);
  transform: translateY(-3px);
}

.page-about .about-next__label {
  display: block;
  font-size: 17px;
  font-weight: 700;
  color: var(--mist);
}

.page-about .about-next__desc {
  display: block;
  margin-top: 6px;
  font-size: 14px;
  line-height: 1.65;
  color: var(--cool);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .origin-layout {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: 28px;
    align-items: start;
  }

  .page-about .contact-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-next__links {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

@media (min-width: 900px) {
  .page-about .about-chapter {
    grid-template-columns: 92px minmax(0, 1fr);
    gap: 30px;
  }

  .page-about .chapter-rail {
    position: sticky;
    top: 96px;
    flex-direction: column;
    align-items: flex-start;
    gap: 14px;
    align-self: start;
  }

  .page-about .chapter-rail__num {
    font-size: 40px;
  }

  .page-about .chapter-rail__label {
    writing-mode: vertical-rl;
    letter-spacing: 0.34em;
    font-size: 12px;
  }

  .page-about .team-layout {
    grid-template-columns: 260px minmax(0, 1fr);
    gap: 34px;
  }

  .page-about .about-hero {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.65fr);
    align-items: end;
    gap: 36px;
  }

  .page-about .about-hero__facts {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 8px;
  }
}

@media (max-width: 899px) {
  .page-about .tl-card__more {
    max-height: none;
    opacity: 1;
    margin-top: 12px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .tl-card,
  .page-about .about-next__link,
  .page-about .eco-node circle,
  .page-about .team-ring__seg {
    transition: none;
  }

  .page-about .tl-card:hover,
  .page-about .about-next__link:hover {
    transform: none;
  }
}
<<<END>>>