.page-about {
  --about-gutter: clamp(14px, 3vw, 28px);
  --about-line: rgba(232, 240, 234, .14);
  position: relative;
  overflow-x: clip;
  padding-bottom: clamp(48px, 8vw, 110px);
  color: var(--fog);
  background:
    radial-gradient(880px 420px at 88% -8%, rgba(198, 255, 61, .10), transparent 70%),
    radial-gradient(680px 380px at 4% 42%, rgba(255, 106, 42, .055), transparent 72%);
}

.page-about * {
  box-sizing: border-box;
}

.page-about a {
  color: inherit;
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumb {
  margin-top: clamp(18px, 3.6vw, 40px);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--slate);
}

.page-about .breadcrumb a {
  color: var(--fog-70);
  text-decoration: none;
}

.page-about .breadcrumb a:hover {
  color: var(--lime);
}

.page-about .breadcrumb span[aria-hidden] {
  margin: 0 8px;
  color: rgba(143, 166, 178, .55);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  display: grid;
  gap: clamp(26px, 5vw, 54px);
  padding-top: clamp(18px, 3.4vw, 32px);
  align-items: start;
}

.page-about .eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  color: var(--lime);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .22em;
  text-transform: uppercase;
}

.page-about .eyebrow::before {
  content: "";
  width: 26px;
  height: 2px;
  background: var(--lime);
}

.page-about .about-hero h1 {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-size: clamp(34px, 8.4vw, 88px);
  font-weight: 800;
  line-height: 1.02;
  letter-spacing: -.02em;
  color: var(--fog);
}

.page-about .about-hero h1 .hl {
  color: var(--lime);
  box-shadow: inset 0 -.12em 0 rgba(198, 255, 61, .22);
}

.page-about .hero-lede {
  margin: clamp(16px, 2.6vw, 24px) 0 0;
  max-width: 56ch;
  font-size: clamp(15px, 1.9vw, 18px);
  line-height: 1.82;
  color: var(--fog-80);
}

.page-about .hero-stats {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0;
  margin: clamp(22px, 3.6vw, 36px) 0 0;
  padding: 0;
  border-top: 1px solid var(--line-strong);
}

.page-about .hero-stats li {
  padding: 14px 10px 14px 0;
  border-bottom: 1px solid var(--about-line);
}

.page-about .hero-stats li:nth-child(even) {
  padding-left: var(--about-gutter);
  border-left: 1px solid var(--about-line);
}

.page-about .stat-num {
  display: block;
  font-size: clamp(26px, 5vw, 40px);
  line-height: 1;
  font-weight: 700;
  letter-spacing: .01em;
  color: var(--lime);
}

.page-about .stat-label {
  display: block;
  margin-top: 8px;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--slate);
}

.page-about .hero-figure {
  position: relative;
  margin: 0;
}

.page-about .slant-frame {
  position: relative;
  overflow: hidden;
  border-radius: var(--r-md);
  clip-path: polygon(0 4%, 100% 0, 100% 96%, 0 100%);
  background: var(--moss);
}

.page-about .slant-frame img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-about .slant-frame--wide img {
  aspect-ratio: 10 / 7;
}

.page-about .slant-frame--tall img {
  aspect-ratio: 4 / 3;
}

.page-about .hero-figure .media-cap {
  margin-top: 10px;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--slate);
}

.page-about .rot-note {
  position: absolute;
  top: 8px;
  right: 4px;
  writing-mode: vertical-rl;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .3em;
  color: var(--lime);
  background: rgba(11, 15, 16, .78);
  padding: 12px 4px;
  border-radius: 999px;
  border: 1px solid rgba(198, 255, 61, .35);
}

/* ---------- 章节通用 ---------- */
.page-about .story-section {
  padding-top: clamp(52px, 9vw, 116px);
}

.page-about .sec-head {
  display: grid;
  gap: 10px;
  margin-bottom: clamp(20px, 3.4vw, 40px);
  border-top: 1px solid var(--about-line);
  padding-top: clamp(16px, 2.6vw, 26px);
}

.page-about .sec-index {
  margin: 0;
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--orange);
}

.page-about .story-section h2 {
  margin: 0;
  max-width: 22ch;
  font-family: var(--font-display);
  font-size: clamp(25px, 4.6vw, 46px);
  font-weight: 800;
  line-height: 1.14;
  letter-spacing: -.015em;
  color: var(--fog);
}

.page-about .sec-lede {
  margin: 0 0 clamp(20px, 3vw, 30px);
  max-width: 62ch;
  font-size: clamp(15px, 1.8vw, 17px);
  line-height: 1.8;
  color: var(--fog-70);
}

.page-about .story-section p {
  font-size: clamp(15px, 1.75vw, 17px);
  line-height: 1.82;
  color: var(--fog-80);
}

.page-about .text-link {
  display: inline-block;
  margin-top: 6px;
  color: var(--ice);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px solid rgba(127, 231, 212, .45);
  padding-bottom: 2px;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.page-about .text-link:hover,
.page-about .text-link:focus-visible {
  color: var(--lime);
  border-color: var(--lime);
}

/* ---------- 起点与定位 ---------- */
.page-about .origin-grid {
  display: grid;
  gap: clamp(22px, 3.6vw, 40px);
}

.page-about .origin-main p {
  margin: 0 0 16px;
}

.page-about .origin-main p:last-child {
  margin-bottom: 0;
}

.page-about .origin-aside {
  padding: clamp(16px, 2.6vw, 24px);
  border-radius: var(--r-md);
  background: linear-gradient(160deg, rgba(18, 53, 43, .85), rgba(11, 15, 16, .55));
  border-left: 2px solid var(--lime);
}

.page-about .aside-kicker {
  margin: 0 0 12px;
  font-size: 11px;
  letter-spacing: .22em;
  color: var(--lime);
}

.page-about .aside-list {
  list-style: none;
  margin: 0 0 14px;
  padding: 0;
}

.page-about .aside-list li {
  position: relative;
  padding-left: 18px;
  margin-bottom: 12px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--fog-70);
}

.page-about .aside-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 8px;
  height: 2px;
  background: var(--orange);
}

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

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--lime) 0%, rgba(198, 255, 61, .38) 42%, rgba(198, 255, 61, .06) 100%);
}

.page-about .tl-item {
  position: relative;
}

.page-about .tl-item + .tl-item {
  margin-top: 12px;
}

.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: -26px;
  top: 20px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--lime);
}

.page-about .tl-node {
  border: 1px solid var(--about-line);
  border-radius: var(--r-md);
  background: linear-gradient(180deg, rgba(18, 53, 43, .62), rgba(11, 15, 16, .42));
  padding: 14px clamp(14px, 2.4vw, 20px);
  transition: border-color .25s var(--ease), box-shadow .25s var(--ease);
}

.page-about .tl-node:hover {
  border-color: rgba(198, 255, 61, .4);
}

.page-about .tl-node[open] {
  border-color: rgba(198, 255, 61, .55);
  box-shadow: inset 3px 0 0 var(--lime);
}

.page-about .tl-node summary {
  display: flex;
  align-items: center;
  gap: 12px;
  list-style: none;
  cursor: pointer;
}

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

.page-about .tl-node summary:focus-visible {
  outline: 2px solid var(--ice);
  outline-offset: 4px;
  border-radius: 6px;
}

.page-about .tl-ver {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--carbon);
  background: var(--lime);
  padding: 3px 8px;
  border-radius: 6px;
}

.page-about .tl-node[open] .tl-ver {
  background: var(--orange);
  color: var(--carbon);
}

.page-about .tl-name {
  font-size: clamp(16px, 2.4vw, 20px);
  font-weight: 700;
  color: var(--fog);
}

.page-about .tl-plus {
  position: relative;
  margin-left: auto;
  width: 16px;
  height: 16px;
  flex: 0 0 16px;
  color: var(--lime);
}

.page-about .tl-plus::before,
.page-about .tl-plus::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  background: currentColor;
}

.page-about .tl-plus::before {
  width: 14px;
  height: 2px;
}

.page-about .tl-plus::after {
  width: 2px;
  height: 14px;
  transition: transform .25s var(--ease), opacity .25s var(--ease);
}

.page-about .tl-node[open] .tl-plus::after {
  transform: translate(-50%, -50%) scaleY(0);
  opacity: 0;
}

.page-about .tl-body {
  margin: 12px 0 2px;
  font-size: 14px;
  line-height: 1.78;
  color: var(--fog-70);
}

.page-about .tl-figure {
  margin: clamp(22px, 3.6vw, 34px) 0 0;
  max-width: 720px;
}

.page-about .tl-figure .media-cap {
  margin-top: 10px;
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--slate);
}

/* ---------- 团队 ---------- */
.page-about .team-grid {
  display: grid;
  gap: 14px;
}

.page-about .team-card {
  padding: clamp(16px, 2.4vw, 22px);
  border-radius: var(--r-md);
  background: rgba(232, 240, 234, .035);
  border: 1px solid var(--about-line);
}

.page-about .team-num {
  display: block;
  font-size: clamp(30px, 5vw, 44px);
  line-height: 1;
  font-weight: 700;
  color: var(--lime);
  letter-spacing: .01em;
}

.page-about .team-card:nth-child(2) .team-num {
  color: var(--orange);
}

.page-about .team-card h3 {
  margin: 10px 0 8px;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--fog);
}

.page-about .team-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--fog-70);
}

/* ---------- 资料库 ---------- */
.page-about .library-grid {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
  align-items: start;
}

.page-about .library-copy > p {
  margin: 0 0 22px;
}

.page-about .lib-block {
  padding-left: 16px;
  border-left: 2px solid rgba(198, 255, 61, .45);
  margin-bottom: 20px;
}

.page-about .lib-block:nth-of-type(2) {
  border-left-color: rgba(127, 231, 212, .5);
}

.page-about .lib-block:nth-of-type(3) {
  border-left-color: rgba(255, 106, 42, .6);
}

.page-about .lib-block h3 {
  margin: 0 0 6px;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--fog);
}

.page-about .lib-block p {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--fog-70);
}

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

.page-about .library-figure .media-cap {
  margin-top: 10px;
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--slate);
}

/* ---------- 合作 ---------- */
.page-about .partner-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-about .partner-list li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 16px;
  align-items: start;
  padding: 18px 0;
  border-bottom: 1px solid var(--about-line);
}

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

.page-about .partner-num {
  font-size: clamp(20px, 3.6vw, 30px);
  font-weight: 700;
  line-height: 1.2;
  color: var(--lime);
  min-width: 76px;
}

.page-about .partner-list h3 {
  margin: 0 0 6px;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--fog);
}

.page-about .partner-list p {
  margin: 0;
  font-size: 14px;
  line-height: 1.76;
  color: var(--fog-70);
}

.page-about .honor-row {
  display: grid;
  gap: 12px;
  margin-top: 24px;
}

.page-about .honor {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 0;
  padding: 14px 16px;
  border-radius: var(--r-sm);
  background: rgba(255, 194, 75, .07);
  border: 1px solid rgba(255, 194, 75, .28);
  font-size: 14px;
  font-weight: 600;
  color: var(--fog);
}

.page-about .honor-tag {
  font-size: 10px;
  letter-spacing: .18em;
  color: var(--amber);
}

/* ---------- 服务承诺 ---------- */
.page-about .promise-grid {
  display: grid;
  gap: 14px;
}

.page-about .promise-card {
  position: relative;
  padding: clamp(18px, 2.6vw, 26px);
  border-radius: var(--r-md);
  background: linear-gradient(155deg, rgba(18, 53, 43, .78), rgba(11, 15, 16, .5));
  border: 1px solid var(--about-line);
  border-top: 2px solid var(--lime);
}

.page-about .promise-card--orange {
  border-top-color: var(--orange);
}

.page-about .promise-mark {
  display: inline-block;
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--slate);
}

.page-about .promise-card h3 {
  margin: 8px 0 8px;
  font-size: clamp(17px, 2.4vw, 21px);
  font-weight: 800;
  letter-spacing: .03em;
  color: var(--fog);
}

.page-about .promise-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--fog-70);
}

.page-about .promise-card p .text-link {
  margin-top: 0;
  font-size: 14px;
  word-break: break-all;
}

.page-about .promise-cta {
  margin-top: clamp(24px, 4vw, 40px);
  padding-top: clamp(18px, 3vw, 28px);
  border-top: 1px solid var(--about-line);
}

.page-about .promise-cta > p {
  margin: 0 0 18px;
  max-width: 60ch;
  color: var(--fog-70);
}

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

.page-about .cta-row .cta {
  flex: 1 1 auto;
  justify-content: center;
  text-align: center;
}

/* ---------- 断点 ---------- */
@media (min-width: 680px) {
  .page-about .hero-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .hero-stats li:nth-child(even) {
    padding-left: 0;
    border-left: 0;
  }

  .page-about .hero-stats li + li {
    padding-left: var(--about-gutter);
    border-left: 1px solid var(--about-line);
  }

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

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

  .page-about .honor-row {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, .88fr);
    align-items: center;
  }

  .page-about .origin-grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, .75fr);
    align-items: start;
  }

  .page-about .library-grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
  }

  .page-about .library-figure {
    margin-top: 8px;
  }

  .page-about .tl-figure {
    margin-left: clamp(0px, 4vw, 48px);
  }
}

@media (min-width: 1080px) {
  .page-about .team-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    align-items: start;
    padding-bottom: 34px;
  }

  .page-about .team-card:nth-child(2) {
    transform: translateY(24px);
  }

  .page-about .team-card:nth-child(3) {
    transform: translateY(-10px);
  }

  .page-about .team-card:nth-child(4) {
    transform: translateY(32px);
  }

  .page-about .story-section h2 {
    max-width: 26ch;
  }

  .page-about .cta-row .cta {
    flex: 0 0 auto;
  }
}
<<<END>>>