.page-about {
  --about-gap: clamp(20px, 3vw, 44px);
  --about-cut: 22px;
  --about-shadow: 0 20px 44px rgba(3, 9, 24, .45);
  --about-body-ink: #3B342C;
  --about-rule: rgba(27, 23, 20, .16);
  position: relative;
  padding-top: var(--bar-h);
  background: var(--ink-blue);
  color: var(--glass-white);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  overflow-wrap: break-word;
}

@media (min-width: 901px) {
  .page-about {
    padding-left: var(--rail-w);
  }
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  max-width: var(--shell);
  margin-inline: auto;
  padding: clamp(26px, 5vw, 56px) var(--gutter) clamp(32px, 5vw, 64px);
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(110% 80% at 88% 0%, rgba(47, 224, 208, .17), transparent 62%),
    radial-gradient(90% 70% at 0% 110%, rgba(255, 90, 31, .16), transparent 66%);
}

.page-about .about-crumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--haze-blue);
}

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

.page-about .about-crumb a:hover,
.page-about .about-crumb a:focus-visible {
  border-bottom-color: currentColor;
}

.page-about .about-kicker {
  margin: 20px 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .22em;
  color: var(--energy-yellow);
}

.page-about .about-hero h1 {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.9rem, 7vw, 4.2rem);
  line-height: 1.06;
  letter-spacing: -.02em;
  color: #fff;
  text-wrap: balance;
}

.page-about .about-lead {
  max-width: 62ch;
  margin: 0;
  font-size: clamp(.98rem, 2.4vw, 1.08rem);
  color: var(--glass-white);
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin: 30px 0 0;
  padding: 0;
}

.page-about .about-stat {
  padding: 14px 14px 16px;
  border: 1px solid var(--line);
  background: rgba(232, 238, 249, .05);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%);
}

.page-about .about-stat dt {
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--haze-blue);
}

.page-about .about-stat dd {
  margin: 4px 0 0;
  font-family: var(--font-mono);
  font-size: clamp(1.4rem, 5vw, 2rem);
  line-height: 1.15;
  color: var(--electric-cyan);
}

.page-about .about-stat__unit {
  margin-left: 6px;
  font-family: var(--font-body);
  font-size: 12px;
  letter-spacing: 0;
  color: var(--haze-blue);
}

.page-about .about-hero__mark {
  display: none;
}

/* ---------- 主体网格 ---------- */
.page-about .about-body {
  display: block;
}

.page-about .about-rail {
  position: sticky;
  top: var(--bar-h);
  z-index: 4;
  padding: 10px var(--gutter);
  border-bottom: 1px solid var(--line);
  background: rgba(10, 22, 51, .94);
  backdrop-filter: blur(8px);
}

.page-about .about-rail__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 4px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .about-rail__link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-size: 12px;
  white-space: nowrap;
  color: var(--haze-blue);
  text-decoration: none;
  transition: color .2s var(--ease), background .2s var(--ease), border-color .2s var(--ease);
}

.page-about .about-rail__idx {
  font-family: var(--font-mono);
  color: var(--neon-orange);
}

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

.page-about .about-rail__link:hover .about-rail__idx,
.page-about .about-rail__link:focus-visible .about-rail__idx {
  color: var(--ink-blue);
}

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

.page-about .about-section {
  padding: clamp(34px, 6vw, 62px) var(--gutter);
  border-bottom: 1px solid var(--line);
}

.page-about .about-head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 16px;
}

.page-about .about-head__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--neon-orange);
}

.page-about .about-head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.4rem, 4.6vw, 2.3rem);
  line-height: 1.18;
  letter-spacing: -.01em;
  color: #fff;
}

.page-about .about-intro {
  max-width: 64ch;
  margin: 0 0 22px;
  color: var(--glass-white);
}

.page-about .about-note {
  margin: 20px 0 0;
  max-width: 64ch;
  font-size: .88rem;
  color: var(--haze-blue);
}

.page-about .about-inline-link {
  color: var(--electric-cyan);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}

.page-about .about-inline-link:hover,
.page-about .about-inline-link:focus-visible {
  color: var(--energy-yellow);
}

/* ---------- 奶油纸层 ---------- */
.page-about .about-paper {
  position: relative;
  padding: clamp(20px, 3.4vw, 38px);
  background: var(--cream);
  color: var(--ink-black);
  border-radius: var(--radius);
  box-shadow: var(--about-shadow);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--about-cut)), calc(100% - var(--about-cut)) 100%, 0 100%);
}

.page-about .about-paper__lead {
  margin: 0 0 18px;
  font-size: 1rem;
  color: var(--about-body-ink);
}

/* ---------- 四类价值 ---------- */
.page-about .about-values {
  display: grid;
  gap: 18px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-value {
  padding-top: 12px;
  border-top: 2px solid var(--about-rule);
}

.page-about .about-value__idx {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--press-red);
}

.page-about .about-value__title {
  margin: 4px 0 6px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.05rem;
  line-height: 1.35;
  color: var(--ink-black);
}

.page-about .about-value__text {
  margin: 0;
  font-size: .94rem;
  line-height: 1.8;
  color: var(--about-body-ink);
}

/* ---------- 图 ---------- */
.page-about .about-figure,
.page-about .about-team__media,
.page-about .about-eco__media {
  margin: 0;
}

.page-about .about-figure {
  margin-bottom: 26px;
}

.page-about .about-figure img,
.page-about .about-team__media img,
.page-about .about-eco__media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border-radius: var(--radius);
}

.page-about .about-figure img {
  aspect-ratio: 3 / 2;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 26px), calc(100% - 26px) 100%, 0 100%);
}

.page-about .about-figure__cap {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--haze-blue);
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  position: relative;
  margin: 6px 0 0;
  padding: 0 0 0 28px;
  list-style: none;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--neon-orange), var(--electric-cyan));
  opacity: .65;
}

.page-about .about-tl-item {
  position: relative;
  padding-bottom: 26px;
}

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

.page-about .about-tl-item::before {
  content: "";
  position: absolute;
  left: -26px;
  top: 8px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--ink-blue);
  border: 2px solid var(--electric-cyan);
  box-shadow: 0 0 0 4px rgba(47, 224, 208, .12);
}

.page-about .about-tl-year {
  font-family: var(--font-mono);
  font-size: 1.2rem;
  letter-spacing: .08em;
  color: var(--energy-yellow);
}

.page-about .about-tl-title {
  margin: 2px 0 6px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.08rem;
  color: #fff;
}

.page-about .about-tl-text {
  max-width: 58ch;
  margin: 0;
  font-size: .94rem;
  color: var(--glass-white);
}

.page-about .about-tl-more {
  max-width: 58ch;
  margin: 10px 0 0;
  padding-left: 10px;
  border-left: 2px solid var(--line);
  font-size: .84rem;
  color: var(--haze-blue);
  max-height: 12em;
  opacity: 1;
  transition: max-height .38s var(--ease), opacity .3s var(--ease), margin-top .3s var(--ease);
}

/* ---------- 目录地图 ---------- */
.page-about .about-map {
  display: grid;
  gap: 24px;
}

.page-about .about-map__figure {
  margin: 0;
  padding: 18px;
  border: 1px solid var(--line);
  background:
    linear-gradient(rgba(47, 224, 208, .06) 1px, transparent 1px) 0 0 / 100% 28px,
    rgba(18, 35, 79, .75);
  border-radius: var(--radius);
}

.page-about .about-map__svg {
  display: block;
  width: 100%;
  max-width: 240px;
  height: auto;
  margin-inline: auto;
}

.page-about .about-map__cap {
  margin-top: 10px;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--haze-blue);
}

.page-about .about-map__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 2px;
}

.page-about .about-map__item {
  padding: 14px 0;
  border-bottom: 1px dashed var(--line);
}

.page-about .about-map__item:first-child {
  padding-top: 0;
}

.page-about .about-map__code {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--neon-orange);
}

.page-about .about-map__name {
  margin: 4px 0 4px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.02rem;
  line-height: 1.35;
}

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

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

.page-about .about-map__desc {
  margin: 0;
  font-size: .9rem;
  color: var(--haze-blue);
}

/* ---------- 分段切换 ---------- */
.page-about .about-tabs {
  margin-top: 6px;
}

.page-about .about-tabs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--about-rule);
}

.page-about .about-tabs__btn {
  cursor: pointer;
  padding: 8px 12px;
  border: 1px solid var(--about-rule);
  border-radius: var(--radius);
  background: transparent;
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .06em;
  color: var(--ink-black);
  transition: background .2s var(--ease), color .2s var(--ease), border-color .2s var(--ease);
}

.page-about .about-tabs__btn:hover,
.page-about .about-tabs__btn:focus-visible {
  border-color: var(--ink-black);
}

.page-about .about-tabs__btn[aria-selected="true"] {
  background: var(--ink-black);
  border-color: var(--ink-black);
  color: var(--cream);
}

.page-about .about-tabs__panel {
  padding-top: 16px;
  font-size: .95rem;
  line-height: 1.8;
  color: var(--about-body-ink);
}

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

.page-about .about-tabs__panel:focus-visible {
  outline: 2px solid var(--press-red);
  outline-offset: 4px;
}

.page-about .about-ind {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-ind__item {
  padding: 5px 10px;
  border: 1px solid rgba(200, 50, 30, .35);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: .76rem;
  letter-spacing: .04em;
  color: var(--press-red);
}

.page-about .about-paths {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-paths__item {
  padding-left: 12px;
  border-left: 2px solid var(--press-red);
  font-size: .92rem;
}

.page-about .about-paths__label {
  display: inline-block;
  margin-right: 8px;
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .08em;
  color: var(--ink-black);
  background: rgba(47, 224, 208, .35);
  padding: 1px 8px;
  border-radius: var(--radius);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  display: grid;
  gap: 24px;
}

.page-about .about-team__media img {
  aspect-ratio: 10 / 7;
  border: 1px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 24px), calc(100% - 24px) 100%, 0 100%);
}

.page-about .about-team__text p {
  margin: 0 0 14px;
  font-size: .96rem;
  color: var(--glass-white);
}

.page-about .about-team__stats {
  display: grid;
  gap: 12px;
  margin: 0 0 16px;
  padding: 0;
  list-style: none;
}

.page-about .about-team__stat {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 10px 12px;
  border-left: 3px solid var(--electric-cyan);
  background: rgba(232, 238, 249, .06);
}

.page-about .about-team__val {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  letter-spacing: .02em;
  color: var(--energy-yellow);
  white-space: nowrap;
}

.page-about .about-team__key {
  font-size: .84rem;
  color: var(--haze-blue);
}

/* ---------- 合作生态 ---------- */
.page-about .about-eco {
  display: grid;
  gap: 24px;
}

.page-about .about-eco__media img {
  aspect-ratio: 4 / 3;
  border: 1px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 24px), calc(100% - 24px) 100%, 0 100%);
}

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

.page-about .about-eco__item {
  padding: 16px 16px 18px;
  border: 1px solid var(--line);
  background: rgba(18, 35, 79, .7);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%);
}

.page-about .about-eco__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--neon-orange);
}

.page-about .about-eco__title {
  margin: 4px 0 6px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1rem;
  color: #fff;
}

.page-about .about-eco__text {
  margin: 0;
  font-size: .9rem;
  color: var(--haze-blue);
}

/* ---------- 结尾入口 ---------- */
.page-about .about-cta {
  padding: clamp(34px, 6vw, 64px) var(--gutter);
  background:
    radial-gradient(80% 120% at 100% 0%, rgba(255, 90, 31, .2), transparent 60%),
    var(--stand-blue);
  border-bottom: 1px solid var(--line);
}

.page-about .about-cta__title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.3rem, 4.4vw, 2rem);
  letter-spacing: -.01em;
  color: #fff;
}

.page-about .about-cta__text {
  max-width: 60ch;
  margin: 0 0 22px;
  font-size: .95rem;
  color: var(--glass-white);
}

.page-about .about-cta__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 平板与桌面 ---------- */
@media (min-width: 720px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 14px;
  }

  .page-about .about-values {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px 30px;
  }

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

  .page-about .about-team__stat {
    flex-direction: column;
    align-items: flex-start;
    gap: 2px;
  }
}

@media (hover: hover) and (min-width: 720px) {
  .page-about .about-tl-more {
    max-height: 0;
    margin-top: 0;
    opacity: 0;
    overflow: hidden;
  }

  .page-about .about-tl-item:hover .about-tl-more,
  .page-about .about-tl-item:focus-within .about-tl-more {
    max-height: 12em;
    margin-top: 10px;
    opacity: 1;
  }
}

@media (min-width: 960px) {
  .page-about .about-body {
    display: grid;
    grid-template-columns: 92px minmax(0, 1fr);
    column-gap: var(--about-gap);
    max-width: var(--shell);
    margin-inline: auto;
    padding-inline: var(--gutter);
    align-items: start;
  }

  .page-about .about-rail {
    position: sticky;
    top: calc(var(--bar-h) + 28px);
    align-self: start;
    padding: 48px 0 0;
    border-bottom: 0;
    background: none;
    backdrop-filter: none;
  }

  .page-about .about-rail__list {
    flex-direction: column;
    gap: 12px;
    overflow: visible;
  }

  .page-about .about-rail__link {
    display: grid;
    gap: 2px;
    padding: 8px 10px;
    white-space: normal;
    line-height: 1.35;
    border-left: 2px solid var(--line);
    border-radius: 0;
  }

  .page-about .about-rail__label {
    font-size: 11px;
  }

  .page-about .about-section,
  .page-about .about-cta {
    padding-inline: 0;
    padding-block: clamp(44px, 4.6vw, 76px);
  }

  .page-about .about-hero__mark {
    display: block;
    position: absolute;
    right: 18px;
    top: 120px;
    writing-mode: vertical-rl;
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: .34em;
    color: var(--press-red);
    opacity: .85;
  }

  .page-about .about-map {
    grid-template-columns: minmax(0, 260px) minmax(0, 1fr);
    gap: 40px;
    align-items: start;
  }

  .page-about .about-map__figure {
    position: sticky;
    top: calc(var(--bar-h) + 48px);
  }

  .page-about .about-map__item {
    display: grid;
    grid-template-columns: 76px minmax(0, 1fr);
    grid-template-areas:
      "code name"
      "code desc";
    column-gap: 18px;
    align-items: baseline;
  }

  .page-about .about-map__code {
    grid-area: code;
  }

  .page-about .about-map__name {
    grid-area: name;
    margin-top: 0;
  }

  .page-about .about-map__desc {
    grid-area: desc;
  }

  .page-about .about-team {
    grid-template-columns: minmax(0, .92fr) minmax(0, 1.08fr);
    gap: 36px;
    align-items: center;
  }

  .page-about .about-eco {
    grid-template-columns: minmax(0, 1fr) minmax(0, .85fr);
    gap: 36px;
    align-items: start;
  }

  .page-about .about-values {
    gap: 26px 34px;
  }

  .page-about .about-tabs__panel {
    max-width: 68ch;
  }
}

@media (min-width: 1200px) {
  .page-about .about-paper--values {
    padding: 40px 44px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-tl-more,
  .page-about .about-rail__link,
  .page-about .about-tabs__btn {
    transition: none;
  }
}
<<<PAGE_CSS_END>>>