.page-about {
  --about-gold-line: rgba(201, 164, 92, 0.45);
  --about-shadow: 0 24px 60px -34px rgba(7, 20, 38, 0.42);
  --about-card: #FFFCF5;
  background: var(--warm);
  color: var(--ink);
  font-family: var(--font-body);
  overflow-x: clip;
}

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

/* 面包屑 */
.page-about .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding-top: 18px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--ink-55);
}

.page-about .breadcrumb a {
  color: var(--ink-55);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}

.page-about .breadcrumb a:hover,
.page-about .breadcrumb a:focus-visible {
  color: var(--star);
  border-bottom-color: var(--about-gold-line);
}

.page-about .breadcrumb [aria-current="page"] {
  color: var(--ink);
}

/* 首屏 */
.about-hero {
  position: relative;
  padding: 0 0 clamp(46px, 7vw, 86px);
  background:
    radial-gradient(120% 90% at 92% 0%, rgba(22, 58, 99, 0.10) 0%, rgba(22, 58, 99, 0) 58%),
    linear-gradient(180deg, var(--paper) 0%, var(--warm) 82%);
}

.about-hero__inner {
  display: grid;
  gap: clamp(28px, 5vw, 56px);
  align-items: center;
  padding-top: clamp(26px, 5vw, 56px);
}

.about-hero__title {
  margin: 0.55em 0 0;
  font-family: var(--font-display);
  font-size: clamp(1.95rem, 5.4vw, 3.5rem);
  line-height: 1.1;
  letter-spacing: -0.03em;
  color: var(--deep);
}

.about-hero__lead {
  margin: 18px 0 0;
  max-width: 46ch;
  font-size: clamp(0.98rem, 2.2vw, 1.06rem);
  line-height: 1.85;
  color: var(--ink-70);
}

.about-hero__facts {
  list-style: none;
  margin: 26px 0 0;
  padding: 18px 0 0;
  border-top: 1px solid var(--line);
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(96px, 1fr));
  gap: 14px 18px;
}

.about-fact__num {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(1.2rem, 3.2vw, 1.55rem);
  letter-spacing: -0.02em;
  color: var(--star);
  line-height: 1.1;
}

.about-fact__label {
  display: block;
  margin-top: 6px;
  font-size: 0.74rem;
  letter-spacing: 0.04em;
  color: var(--ink-55);
}

.about-hero__figure {
  position: relative;
  margin: 0;
  overflow: hidden;
  border-radius: 3px 44px 3px 3px;
  box-shadow: var(--about-shadow);
  background: var(--deep);
}

.about-hero__figure img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.about-hero__figure figcaption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 14px 16px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--gold-soft);
  background: linear-gradient(180deg, rgba(7, 20, 38, 0) 0%, rgba(7, 20, 38, 0.78) 100%);
}

/* 定位段落 */
.about-intro {
  padding: clamp(34px, 6vw, 62px) 0 clamp(30px, 5vw, 54px);
  background: var(--warm);
}

.about-intro__body {
  max-width: 66ch;
  padding-left: clamp(16px, 3vw, 30px);
  border-left: 2px solid var(--gold);
}

.about-intro__kicker {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  color: var(--slate);
}

.about-intro__text {
  margin: 0;
  font-family: var(--font-serif);
  font-size: clamp(1rem, 2vw, 1.1rem);
  line-height: 1.9;
  color: var(--ink-70);
}

/* 章节头 */
.about-head {
  display: grid;
  gap: 10px;
  margin: 0 0 clamp(26px, 4vw, 44px);
}

.about-head__no {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  color: var(--gold);
}

.about-head h2 {
  margin: 0;
  font-family: var(--font-serif);
  font-size: clamp(1.45rem, 3.6vw, 2.35rem);
  line-height: 1.28;
  letter-spacing: -0.01em;
  color: var(--deep);
}

.about-head p {
  margin: 0;
  max-width: 58ch;
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--ink-70);
}

.about-head--invert h2 {
  color: var(--warm);
}

.about-head--invert .about-head__no {
  color: var(--gold-soft);
}

/* 时间轴 */
.about-timeline {
  padding: clamp(48px, 8vw, 88px) 0;
  background: var(--paper);
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
}

.about-timeline__body {
  position: relative;
}

.about-track {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}

.about-track::before {
  content: "";
  position: absolute;
  left: 10px;
  top: 4px;
  bottom: 4px;
  width: 1px;
  background: linear-gradient(180deg, rgba(201, 164, 92, 0) 0%, var(--gold) 14%, rgba(201, 164, 92, 0.35) 86%, rgba(201, 164, 92, 0) 100%);
}

.about-track__item {
  position: relative;
  padding-left: 32px;
}

.about-track__item + .about-track__item {
  margin-top: 16px;
}

.about-track__item::after {
  content: "";
  position: absolute;
  left: 6px;
  top: 24px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 4px rgba(201, 164, 92, 0.16);
}

.about-node {
  padding: 16px 18px;
  background: var(--about-card);
  border: 1px solid var(--line-soft);
  border-radius: 2px 16px 2px 2px;
  box-shadow: 0 18px 40px -36px rgba(7, 20, 38, 0.6);
  transition: border-color var(--t-fast) var(--ease);
}

.about-node[open] {
  border-color: var(--about-gold-line);
}

.about-node summary {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 14px;
  cursor: pointer;
  list-style: none;
}

.about-node summary::-webkit-details-marker {
  display: none;
}

.about-node summary::marker {
  content: "";
}

.about-node summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: var(--slate);
}

.about-node[open] summary::after {
  content: "–";
  color: var(--gold);
}

.about-node summary:focus-visible {
  outline: 2px solid var(--star);
  outline-offset: 4px;
  border-radius: 2px;
}

.about-node__year {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.1em;
  color: var(--gold);
}

.about-node__label {
  font-family: var(--font-display);
  font-size: 1.02rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.about-node__text {
  margin: 12px 0 0;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--ink-70);
}

.about-timeline__figure {
  position: relative;
  margin: clamp(30px, 5vw, 58px) 0 0;
}

.about-timeline__figure img {
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border-radius: 2px 2px 2px 30px;
}

.about-timeline__figure figcaption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  color: var(--ink-55);
}

/* 业务版图 */
.about-lines {
  padding: clamp(48px, 8vw, 88px) 0;
  background: var(--warm);
}

.about-lines__grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.about-line {
  padding: 20px 20px 22px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.7) 0%, rgba(255, 255, 255, 0) 100%);
  border-top: 2px solid rgba(201, 164, 92, 0.32);
  border-radius: 2px;
  transition: border-color var(--t-fast) var(--ease);
}

.about-line:hover,
.about-line:focus-within {
  border-top-color: var(--gold);
}

.about-line__no {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--gold);
}

.about-line h3 {
  margin: 8px 0;
  font-family: var(--font-display);
  font-size: 1.1rem;
  letter-spacing: -0.01em;
  color: var(--deep);
}

.about-line p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--ink-70);
}

.about-lines__more {
  margin: clamp(26px, 4vw, 42px) 0 0;
}

/* 服务规模 */
.about-stats {
  position: relative;
  overflow: hidden;
  padding: clamp(48px, 8vw, 86px) 0;
  color: var(--warm);
  background: linear-gradient(155deg, #163A63 0%, #0B1F3A 52%, #071426 100%);
}

.about-stats::after {
  content: "";
  position: absolute;
  left: -10%;
  right: -10%;
  bottom: -46%;
  height: 70%;
  background: radial-gradient(60% 60% at 50% 0%, rgba(201, 164, 92, 0.16) 0%, rgba(201, 164, 92, 0) 70%);
  pointer-events: none;
}

.about-stats .shell {
  position: relative;
  z-index: 1;
}

.about-stats__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 26px 20px;
}

.about-stat {
  padding-top: 16px;
  border-top: 1px solid var(--line-invert);
}

.about-stat__num {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(1.95rem, 4.4vw, 2.9rem);
  line-height: 1;
  letter-spacing: -0.045em;
  color: var(--gold-soft);
}

.about-stat__unit {
  display: block;
  margin-top: 10px;
  font-size: 0.84rem;
  letter-spacing: 0.04em;
  color: rgba(246, 242, 232, 0.86);
}

.about-stat__note {
  margin: 8px 0 0;
  font-size: 0.76rem;
  line-height: 1.7;
  color: rgba(246, 242, 232, 0.56);
}

.about-stats__foot {
  margin: clamp(30px, 5vw, 48px) 0 0;
  max-width: 44ch;
  font-family: var(--font-serif);
  font-size: clamp(1rem, 2vw, 1.15rem);
  line-height: 1.75;
  color: rgba(246, 242, 232, 0.92);
}

/* 团队 */
.about-team {
  padding: clamp(48px, 8vw, 88px) 0;
  background: var(--paper);
}

.about-team__inner {
  display: grid;
  gap: clamp(28px, 5vw, 54px);
}

.about-team__text {
  margin: 0 0 16px;
  max-width: 54ch;
  font-size: 0.95rem;
  line-height: 1.85;
  color: var(--ink-70);
}

.about-plates {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.about-plate {
  padding: 18px 20px;
  background: var(--about-card);
  border: 1px solid var(--line-soft);
  border-left: 3px solid var(--gold);
  border-radius: 2px 14px 2px 2px;
}

.about-plate__num {
  font-family: var(--font-display);
  font-size: 1.7rem;
  letter-spacing: -0.03em;
  color: var(--deep);
  line-height: 1.1;
}

.about-plate__label {
  display: block;
  margin-top: 6px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  color: var(--slate);
}

.about-plate__text {
  margin: 10px 0 0;
  font-size: 0.88rem;
  line-height: 1.75;
  color: var(--ink-70);
}

/* 合作生态 */
.about-eco {
  padding: clamp(48px, 8vw, 88px) 0;
  background: linear-gradient(180deg, #F1EFE6 0%, var(--warm) 100%);
}

.about-eco__inner {
  display: grid;
  gap: clamp(28px, 4vw, 48px);
}

.about-eco__list {
  list-style: none;
  margin: 0 0 20px;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.about-eco__item {
  padding: 14px 12px;
  background: rgba(255, 255, 255, 0.68);
  border-top: 2px solid rgba(22, 58, 99, 0.2);
  border-radius: 0 0 10px 10px;
}

.about-eco__num {
  font-family: var(--font-display);
  font-size: 1.5rem;
  letter-spacing: -0.03em;
  color: var(--star);
  line-height: 1.1;
}

.about-eco__label {
  display: block;
  margin-top: 6px;
  font-size: 0.74rem;
  line-height: 1.5;
  color: var(--ink-55);
}

.about-honor {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px 18px;
  background: var(--deep);
  color: var(--warm);
  border-radius: 2px 16px 2px 2px;
}

.about-honor__mark {
  font-size: 0.8rem;
  line-height: 1.7;
  color: var(--gold);
}

.about-honor p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.75;
  color: rgba(246, 242, 232, 0.9);
}

.about-eco__figure {
  margin: 0;
  overflow: hidden;
  border-radius: 30px 2px 2px 2px;
  box-shadow: var(--about-shadow);
}

.about-eco__figure img {
  width: 100%;
  aspect-ratio: 14 / 9;
  object-fit: cover;
}

.about-eco__figure figcaption {
  padding: 12px 16px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  color: var(--ink-55);
  background: rgba(255, 255, 255, 0.72);
}

/* 结尾 */
.about-cta {
  padding: clamp(54px, 9vw, 100px) 0;
  background:
    radial-gradient(90% 120% at 10% 0%, rgba(201, 164, 92, 0.16) 0%, rgba(201, 164, 92, 0) 62%),
    var(--warm);
}

.about-cta__inner {
  max-width: 62ch;
}

.about-cta h2 {
  margin: 0 0 16px;
  font-family: var(--font-serif);
  font-size: clamp(1.55rem, 4vw, 2.4rem);
  line-height: 1.28;
  letter-spacing: -0.01em;
  color: var(--deep);
}

.about-cta p {
  margin: 0 0 26px;
  font-size: 0.95rem;
  line-height: 1.85;
  color: var(--ink-70);
}

.about-cta p a {
  color: var(--star);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.about-cta p a:hover,
.about-cta p a:focus-visible {
  color: var(--deep);
}

.about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* 中等屏幕 */
@media (min-width: 760px) {
  .about-stats__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 24px;
  }

  .about-lines__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px 28px;
    padding-bottom: 30px;
  }

  .about-line:nth-child(even) {
    transform: translateY(30px);
  }

  .about-timeline__figure {
    width: 76%;
    margin-left: auto;
  }
}

/* 桌面 */
@media (min-width: 920px) {
  .about-hero__inner {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  }

  .about-plates {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
  }

  .about-plate {
    padding: 20px 16px;
  }

  .about-track::before {
    left: 50%;
  }

  .about-track__item {
    width: 50%;
    padding: 0 44px 0 0;
  }

  .about-track__item:nth-child(even) {
    margin-left: 50%;
    padding: 0 0 0 44px;
  }

  .about-track__item + .about-track__item {
    margin-top: 22px;
  }

  .about-track__item::after {
    top: 26px;
    left: auto;
    right: -5px;
  }

  .about-track__item:nth-child(even)::after {
    right: auto;
    left: -5px;
  }

  .about-team__inner {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: start;
  }

  .about-eco__inner {
    grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
    align-items: center;
  }

  .about-eco__figure {
    order: 2;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-line,
  .page-about .about-node,
  .page-about .breadcrumb a {
    transition: none;
  }

  .page-about .about-line:nth-child(even) {
    transform: none;
  }
}
<<<END>>>