.page-about {
  background: var(--ink);
  color: var(--cream);
  overflow-x: clip;
}

.page-about .mono {
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
}

/* 首屏 */
.page-about .about-hero {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 24px var(--gutter) 8px;
}

.page-about .about-hero__crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--mist);
}

.page-about .about-hero__crumbs a {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.page-about .about-hero__crumbs a:hover,
.page-about .about-hero__crumbs a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
  padding: 28px 0 40px;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-hero__title {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(30px, 8.4vw, 64px);
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: var(--cream);
}

.page-about .about-hero__title::after {
  content: "";
  display: block;
  width: 72px;
  height: 3px;
  margin-top: 20px;
  background: var(--orange);
}

.page-about .about-hero__intro {
  margin: 0;
  font-size: 16px;
  line-height: 1.75;
  color: rgba(244, 239, 228, 0.84);
  max-width: 36em;
}

.page-about .about-hero__meta {
  margin: 18px 0 0;
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--mist);
  padding-top: 14px;
  border-top: 1px dashed var(--line);
}

/* 章节骨架 */
.page-about .chapter {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 48px var(--gutter);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
  scroll-margin-top: calc(var(--bar) + 16px);
}

.page-about .chapter__rail {
  display: flex;
  align-items: center;
  gap: 12px;
}

.page-about .chapter__num {
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--cyan);
  border: 1px solid var(--line-strong);
  padding: 4px 8px;
  clip-path: var(--cut-sm);
  white-space: nowrap;
}

.page-about .chapter__note {
  font-size: 11px;
  letter-spacing: 0.28em;
  color: var(--mist);
  white-space: nowrap;
}

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

.page-about .chapter__title {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-size: clamp(22px, 5.4vw, 40px);
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -0.01em;
  color: var(--cream);
}

.page-about .chapter__body > p {
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.75;
  color: rgba(244, 239, 228, 0.8);
  max-width: 38em;
}

/* 支撑事实 */
.page-about .facts {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  max-width: 42em;
}

.page-about .facts li {
  padding: 14px 0 14px 16px;
  border-left: 2px solid var(--line-strong);
  border-bottom: 1px solid var(--line-soft);
  font-size: 15px;
  line-height: 1.7;
  color: rgba(244, 239, 228, 0.86);
  transition: border-left-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-about .facts li:first-child {
  border-top: 1px solid var(--line-soft);
}

.page-about .facts li:hover {
  border-left-color: var(--cyan);
  color: var(--cream);
}

/* 图片 */
.page-about .about-figure {
  margin: 32px 0 0;
  max-width: 100%;
}

.page-about .about-figure .media {
  margin: 0;
  overflow: hidden;
  clip-path: var(--cut-md);
  background: var(--panel-2);
  border: 1px solid var(--line);
}

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

.page-about .about-figure figcaption {
  margin-top: 10px;
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.04em;
  color: var(--mist);
}

/* 主张留白块 */
.page-about .pull {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 64px var(--gutter);
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
}

.page-about .pull__text {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(26px, 7.2vw, 64px);
  line-height: 1.14;
  letter-spacing: -0.02em;
  color: var(--cream);
  max-width: 16em;
}

.page-about .pull__text em {
  font-style: normal;
  color: var(--orange);
}

/* 时间轴 */
.page-about .tline {
  margin: 28px 0 8px;
}

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

.page-about .tline__base {
  stroke: var(--line-soft);
  stroke-width: 1;
  stroke-dasharray: 3 5;
}

.page-about .tline__path {
  fill: none;
  stroke: var(--cyan);
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.page-about .tline__dot {
  fill: var(--ink);
  stroke: var(--cyan);
  stroke-width: 2;
}

.page-about .tline__dot--now {
  fill: var(--orange);
  stroke: var(--orange);
}

.page-about .tline__tag {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  fill: var(--mist);
}

.page-about .tline__jumps {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}

.page-about .tline__jump {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--mist);
  text-decoration: none;
  border: 1px solid var(--line);
  padding: 6px 10px;
  clip-path: var(--cut-sm);
  transition: color var(--dur) var(--ease), background-color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .tline__jump:hover,
.page-about .tline__jump:focus-visible {
  color: var(--ink);
  background: var(--cyan);
  border-color: var(--cyan);
}

.page-about .stages {
  margin-top: 28px;
  display: grid;
  gap: 2px;
}

.page-about .stage {
  padding: 18px 0 18px 18px;
  border-left: 2px solid var(--line-strong);
  scroll-margin-top: calc(var(--bar) + 24px);
  transition: border-left-color var(--dur) var(--ease);
}

.page-about .stage:target {
  border-left-color: var(--orange);
  background: linear-gradient(90deg, rgba(255, 107, 44, 0.09), rgba(255, 107, 44, 0) 72%);
}

.page-about .stage__label {
  margin: 0 0 8px;
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--orange);
}

.page-about .stage__title {
  margin: 0 0 8px;
  font-size: 19px;
  font-weight: 800;
  line-height: 1.35;
  color: var(--cream);
}

.page-about .stage__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: rgba(244, 239, 228, 0.78);
  max-width: 36em;
}

/* 团队档案卡 */
.page-about .gram {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  margin-top: 28px;
}

.page-about .gram__card {
  background: var(--cream);
  color: var(--paper-ink);
  padding: 20px 20px 18px;
  clip-path: var(--cut-md);
  box-shadow: inset 0 0 0 1px var(--paper-shadow);
}

.page-about .gram__code {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--orange);
}

.page-about .gram__name {
  margin: 8px 0 6px;
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 800;
  letter-spacing: 0.01em;
  color: var(--paper-ink);
}

.page-about .gram__role {
  margin: 0;
  font-size: 13px;
  line-height: 1.65;
  color: var(--paper-muted);
}

.page-about .gram__toggle {
  margin-top: 16px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  font-family: inherit;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--paper-ink);
  background: transparent;
  border: 1px solid var(--paper-ink);
  clip-path: var(--cut-sm);
  cursor: pointer;
  transition: background-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-about .gram__toggle:hover {
  background: var(--paper-ink);
  color: var(--cream);
}

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

.page-about .gram__toggle[aria-expanded="true"] .gram__chev {
  transform: rotate(45deg);
}

.page-about .gram__chev {
  display: inline-block;
  font-size: 12px;
  line-height: 1;
  transition: transform var(--dur-slow) var(--ease);
}

.page-about .gram__panel {
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px dashed var(--paper-shadow);
}

.page-about .gram__panel ul {
  margin: 0;
  padding-left: 16px;
  display: grid;
  gap: 8px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--paper-ink);
}

/* 规模数据 */
.page-about .stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: 26px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .stats__item {
  background: var(--panel);
  padding: 18px 14px;
}

.page-about .stats__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 26px;
  line-height: 1.15;
  color: var(--cyan);
}

.page-about .stats__label {
  display: block;
  margin-top: 8px;
  font-size: 12px;
  line-height: 1.5;
  letter-spacing: 0.04em;
  color: var(--mist);
}

/* 合作生态 */
.page-about .partners {
  margin-top: 28px;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  clip-path: var(--cut-md);
}

.page-about .partners__col {
  background: var(--panel-2);
  padding: 20px 18px;
}

.page-about .partners__k {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--gold);
}

.page-about .partners__v {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(244, 239, 228, 0.82);
}

.page-about .partners__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
  font-size: 14px;
  line-height: 1.6;
  color: rgba(244, 239, 228, 0.86);
}

.page-about .partners__list li {
  padding-left: 14px;
  position: relative;
}

.page-about .partners__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 6px;
  height: 1px;
  background: var(--cyan);
}

.page-about .partners__link {
  display: inline-block;
  margin-top: 14px;
  font-size: 13px;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--line-strong);
  padding-bottom: 2px;
}

.page-about .partners__link:hover,
.page-about .partners__link:focus-visible {
  border-bottom-color: var(--cyan);
}

/* 收束 */
.page-about .outro {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 56px var(--gutter) 72px;
  border-top: 1px solid var(--line-soft);
}

.page-about .outro__eyebrow {
  margin: 0 0 12px;
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--mist);
}

.page-about .outro__title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: clamp(22px, 5.2vw, 34px);
  font-weight: 800;
  line-height: 1.22;
  color: var(--cream);
}

.page-about .outro__text {
  margin: 0 0 24px;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(244, 239, 228, 0.78);
  max-width: 40em;
}

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

/* 断点 */
@media (min-width: 768px) {
  .page-about .about-hero {
    padding-top: 32px;
  }

  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
    align-items: end;
    gap: 40px;
    padding: 40px 0 56px;
  }

  .page-about .chapter {
    padding: 64px var(--gutter);
    gap: 28px;
  }

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

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

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

  .page-about .pull {
    padding: 88px var(--gutter);
  }
}

@media (min-width: 1024px) {
  .page-about .chapter {
    grid-template-columns: 104px minmax(0, 1fr);
    column-gap: 64px;
    padding: 88px var(--gutter);
  }

  .page-about .chapter__rail {
    flex-direction: column;
    align-items: flex-start;
    justify-content: flex-start;
    gap: 18px;
    padding-top: 8px;
  }

  .page-about .chapter__note {
    writing-mode: vertical-rl;
    letter-spacing: 0.34em;
  }

  .page-about .chapter__body {
    max-width: 82%;
  }

  .page-about .about-hero__grid {
    padding: 52px 0 72px;
  }

  .page-about .stages {
    margin-top: 36px;
    gap: 6px;
  }

  .page-about .stage {
    padding: 22px 0 22px 26px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .facts li,
  .page-about .tline__jump,
  .page-about .gram__toggle,
  .page-about .gram__chev,
  .page-about .stage {
    transition: none;
  }
}
<<<END>>>