.page-about {
  --about-line: rgba(11, 30, 58, 0.14);
  --about-line-dark: rgba(255, 255, 255, 0.18);
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  overflow-x: hidden;
}

.page-about .wrap {
  max-width: 1180px;
  margin-inline: auto;
  padding-inline: var(--gutter);
}

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

/* ---------- 首屏拼贴 ---------- */
.page-about .about-hero {
  padding-block: clamp(20px, 3vw, 34px) clamp(34px, 5vw, 64px);
  border-bottom: 1px solid var(--about-line);
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(26px, 4vw, 44px);
  min-width: 0;
}

.page-about .about-hero__lead {
  min-width: 0;
}

.page-about .about-hero__title {
  margin: 12px 0 0;
  font-size: clamp(32px, 6.4vw, 72px);
  font-weight: 900;
  line-height: 1.04;
  letter-spacing: -0.02em;
  color: var(--navy);
  max-width: 16em;
}

.page-about .about-hero__intro {
  margin: 20px 0 0;
  font-size: clamp(16px, 1.6vw, 18px);
  line-height: 1.78;
  color: var(--ink-2);
  max-width: 40em;
  border-left: 3px solid var(--mint);
  padding-left: 16px;
}

.page-about .about-hero__act {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 26px;
}

.page-about .about-hero__side {
  min-width: 0;
  display: grid;
  gap: 18px;
  align-content: start;
}

.page-about .about-status {
  border: 1px solid var(--about-line);
  background: #fff;
}

.page-about .about-status__row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--about-line);
}

.page-about .about-status__row:last-child {
  border-bottom: 0;
}

.page-about .about-status__k {
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--ink-2);
}

.page-about .about-status__v {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 700;
  color: var(--navy);
}

.page-about .about-toc {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--about-line);
}

.page-about .about-toc__link {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 10px 2px;
  border-bottom: 1px solid var(--about-line);
  color: var(--ink);
  text-decoration: none;
  font-size: 14px;
  transition: color 160ms ease, padding-left 160ms ease;
}

.page-about .about-toc__link .mono {
  font-size: 12px;
  color: var(--violet);
  letter-spacing: 0.06em;
}

.page-about .about-toc__link:hover,
.page-about .about-toc__link:focus-visible {
  color: var(--wine);
  padding-left: 8px;
}

/* ---------- 通用段落 ---------- */
.page-about .about-sec {
  padding-block: clamp(38px, 6vw, 76px);
  border-bottom: 1px solid var(--about-line);
  scroll-margin-top: 80px;
}

.page-about .sec-head {
  display: grid;
  gap: 10px;
  margin-bottom: clamp(22px, 3.4vw, 36px);
}

.page-about .sec-head__idx {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--violet);
}

.page-about .sec-head__title {
  margin: 0;
  font-size: clamp(23px, 3.6vw, 38px);
  font-weight: 800;
  line-height: 1.22;
  letter-spacing: -0.015em;
  color: var(--navy);
  max-width: 22em;
}

.page-about .about-sec__lead {
  margin: 0 0 24px;
  max-width: 46em;
  font-size: 16px;
  line-height: 1.78;
  color: var(--ink-2);
}

.page-about .about-sec p {
  font-size: 16px;
  line-height: 1.78;
  color: var(--ink-2);
}

/* ---------- 01 覆盖 ---------- */
.page-about .cover {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
  min-width: 0;
}

.page-about .cover__text {
  min-width: 0;
}

.page-about .cover__text p {
  margin: 0 0 14px;
}

.page-about .cover__fig,
.page-about .principles__fig,
.page-about .timeline__fig {
  margin: 0;
  min-width: 0;
  border: 1px solid var(--about-line);
  background: var(--paper-2);
}

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

.page-about .cover__cap,
.page-about .principles__cap,
.page-about .timeline__cap {
  display: block;
  padding: 9px 14px;
  font-size: 11px;
  letter-spacing: 0.05em;
  color: var(--ink-2);
  background: #fff;
  border-top: 1px solid var(--about-line);
}

.page-about .metrics {
  margin-top: 24px;
  border-top: 1px solid var(--navy);
}

.page-about .metric {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 4px 14px;
  padding: 12px 0 10px;
  border-bottom: 1px solid var(--about-line);
}

.page-about .metric__k {
  font-size: 13px;
  color: var(--ink-2);
  align-self: center;
}

.page-about .metric__v {
  font-family: var(--mono);
  font-size: clamp(17px, 2.2vw, 21px);
  font-weight: 700;
  color: var(--navy);
  letter-spacing: 0.02em;
  text-align: right;
}

.page-about .metric__bar {
  grid-column: 1 / -1;
  height: 3px;
  background: var(--paper-2);
  overflow: hidden;
}

.page-about .metric__fill {
  display: block;
  height: 100%;
  width: 100%;
  background: var(--navy);
}

.page-about .metric:nth-child(2) .metric__fill {
  width: 82%;
  background: var(--navy-3);
}

.page-about .metric:nth-child(3) .metric__fill {
  width: 68%;
  background: var(--mint);
}

.page-about .metric:nth-child(4) .metric__fill {
  width: 54%;
  background: var(--amber);
}

.page-about .metric:nth-child(5) .metric__fill {
  width: 40%;
  background: var(--wine);
}

/* ---------- 02 原则 ---------- */
.page-about .principles {
  display: grid;
  gap: clamp(22px, 3.4vw, 40px);
  min-width: 0;
}

.page-about .principles__list {
  min-width: 0;
  border-top: 1px solid var(--navy);
}

.page-about .principle {
  display: grid;
  grid-template-columns: 12px minmax(0, 1fr);
  gap: 14px;
  padding: 18px 0;
  border-bottom: 1px solid var(--about-line);
}

.page-about .principle .lamp {
  margin-top: 8px;
}

.page-about .principle__title {
  margin: 0 0 6px;
  font-size: clamp(17px, 2vw, 20px);
  font-weight: 800;
  color: var(--navy);
  letter-spacing: -0.01em;
}

.page-about .principle__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-2);
}

.page-about .principles__fig {
  align-self: start;
}

/* ---------- 03 岗位 ---------- */
.page-about .roles {
  display: grid;
  gap: 10px;
}

.page-about .role {
  border: 1px solid var(--about-line);
  background: #fff;
  transition: border-color 180ms ease, box-shadow 180ms ease;
}

.page-about .role[open] {
  border-color: var(--navy);
  box-shadow: inset 3px 0 0 0 var(--mint);
}

.page-about .role summary {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  padding: 15px 16px;
  cursor: pointer;
  list-style: none;
}

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

.page-about .role summary:focus-visible {
  outline: 2px solid var(--violet);
  outline-offset: -4px;
}

.page-about .role__no {
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--violet);
}

.page-about .role__name {
  font-size: 16px;
  font-weight: 700;
  color: var(--navy);
  min-width: 0;
}

.page-about .role__hint {
  font-size: 11px;
  letter-spacing: 0.05em;
  color: var(--ink-2);
  padding: 3px 8px;
  background: var(--paper-2);
  white-space: nowrap;
}

.page-about .role[open] .role__hint {
  background: var(--amber);
  color: #1a1f26;
}

.page-about .role__body {
  padding: 0 16px 16px;
  border-top: 1px dashed var(--about-line);
  margin-top: 2px;
  padding-top: 12px;
}

.page-about .role__body p {
  margin: 0;
  font-size: 15px;
}

/* ---------- 04 时间轴 ---------- */
.page-about .timeline-wrap {
  display: grid;
  gap: clamp(24px, 3.6vw, 42px);
  min-width: 0;
}

.page-about .timeline {
  list-style: none;
  margin: 0 0 0 6px;
  padding: 0 0 0 24px;
  border-left: 2px solid var(--navy-3);
  min-width: 0;
}

.page-about .stage {
  position: relative;
  padding-bottom: 26px;
  min-width: 0;
}

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

.page-about .stage::before {
  content: "";
  position: absolute;
  left: -33px;
  top: 4px;
  width: 14px;
  height: 14px;
  background: var(--paper);
  border: 2px solid var(--navy);
  transition: background 180ms ease, border-color 180ms ease;
}

.page-about .stage:hover::before,
.page-about .stage:focus-within::before {
  background: var(--amber);
  border-color: var(--amber);
}

.page-about .stage--current::before {
  background: var(--mint);
  border-color: var(--mint);
  box-shadow: 0 0 0 4px rgba(0, 229, 168, 0.2);
}

.page-about .stage__ver {
  display: inline-block;
  font-size: 11px;
  letter-spacing: 0.06em;
  color: #fff;
  background: var(--navy);
  padding: 3px 9px;
}

.page-about .stage--current .stage__ver {
  background: var(--wine);
}

.page-about .stage__title {
  margin: 8px 0 4px;
  font-size: clamp(16px, 2vw, 19px);
  font-weight: 800;
  color: var(--navy);
}

.page-about .stage__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-2);
}

.page-about .timeline__fig {
  align-self: start;
}

/* ---------- 05 质量 ---------- */
.page-about .quality {
  display: grid;
  gap: 12px;
}

.page-about .quality__item {
  padding: 18px;
  background: #fff;
  border: 1px solid var(--about-line);
  border-top: 3px solid var(--navy);
}

.page-about .quality__item:nth-child(2) {
  border-top-color: var(--violet);
}

.page-about .quality__item:nth-child(3) {
  border-top-color: var(--mint);
}

.page-about .quality__num {
  display: block;
  font-size: clamp(26px, 4vw, 34px);
  font-weight: 700;
  color: var(--navy);
  letter-spacing: 0.01em;
  line-height: 1;
  margin-bottom: 10px;
}

.page-about .quality__title {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 800;
  color: var(--navy);
}

.page-about .quality__item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
}

.page-about .quality__item--wide {
  background: var(--paper-2);
  border-top-color: var(--wine);
}

/* ---------- 06 生态 ---------- */
.page-about .partners {
  display: grid;
  gap: 12px;
}

.page-about .partners__panel {
  padding: clamp(20px, 3vw, 30px);
  border: 1px solid var(--about-line);
}

.page-about .partners__panel h3 {
  margin: 8px 0 10px;
  font-size: clamp(18px, 2.4vw, 23px);
  font-weight: 800;
  letter-spacing: -0.01em;
}

.page-about .partners__panel p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
}

.page-about .partners__panel--navy {
  background: var(--navy);
  border-color: var(--navy);
  color: #fff;
}

.page-about .partners__panel--navy h3 {
  color: #fff;
}

.page-about .partners__panel--navy p {
  color: rgba(255, 255, 255, 0.82);
}

.page-about .partners__panel--navy .kicker {
  color: var(--mint);
}

.page-about .partners__panel--paper {
  background: #fff;
}

.page-about .partners__panel--paper h3 {
  color: var(--navy);
}

/* ---------- 结尾出口 ---------- */
.page-about .about-next {
  margin-block: clamp(34px, 5vw, 60px) clamp(40px, 6vw, 72px);
  padding: clamp(24px, 4vw, 40px);
  background: var(--navy-2);
  color: #fff;
}

.page-about .about-next__title {
  margin: 0 0 10px;
  font-size: clamp(21px, 3vw, 30px);
  font-weight: 800;
  letter-spacing: -0.01em;
}

.page-about .about-next__lead {
  margin: 0 0 20px;
  max-width: 44em;
  font-size: 15px;
  line-height: 1.78;
  color: rgba(255, 255, 255, 0.78);
}

.page-about .about-next__list {
  list-style: none;
  margin: 0 0 22px;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--about-line-dark);
}

.page-about .about-next__list a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 13px 2px;
  border-bottom: 1px solid var(--about-line-dark);
  color: #fff;
  text-decoration: none;
  font-size: 15px;
  font-weight: 600;
  transition: color 160ms ease, padding-left 160ms ease;
}

.page-about .about-next__list a .mono {
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--mint);
}

.page-about .about-next__arrow {
  margin-left: auto;
  color: var(--amber);
}

.page-about .about-next__list a:hover,
.page-about .about-next__list a:focus-visible {
  color: var(--mint);
  padding-left: 8px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-about .metrics {
    display: grid;
    grid-template-columns: 1fr 1fr;
    column-gap: 26px;
  }

  .page-about .quality {
    grid-template-columns: 1fr 1fr;
  }

  .page-about .quality__item--wide {
    grid-column: 1 / -1;
  }

  .page-about .partners {
    grid-template-columns: 1fr 1fr;
  }

  .page-about .about-next__list {
    grid-template-columns: 1fr 1fr;
    column-gap: 28px;
  }
}

@media (min-width: 960px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.42fr) minmax(0, 0.7fr);
    align-items: start;
  }

  .page-about .cover {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr);
    align-items: start;
  }

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

  .page-about .timeline-wrap {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: start;
  }

  .page-about .timeline {
    margin-left: 8px;
  }

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

  .page-about .quality__item--wide {
    grid-column: 1 / -1;
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-about .about-toc__link,
  .page-about .role,
  .page-about .stage::before,
  .page-about .about-next__list a {
    transition: none;
  }
}
<<<END>>>