.page-about {
  display: block;
  position: relative;
  overflow-x: clip;
}

.page-about .section {
  padding-top: clamp(44px, 7vw, 96px);
  padding-bottom: clamp(44px, 7vw, 96px);
}

.page-about h2 {
  margin: 12px 0 0;
  font-size: clamp(23px, 3.2vw, 40px);
  font-weight: 900;
  line-height: 1.16;
  letter-spacing: -.012em;
  color: var(--c-text);
  max-width: 24ch;
}

.page-about h3 {
  color: var(--c-text);
}

/* ============ 首屏 ============ */
.page-about .about-hero {
  position: relative;
  padding-top: clamp(26px, 4.5vw, 60px);
  padding-bottom: clamp(30px, 5vw, 64px);
  background:
    radial-gradient(120% 88% at 88% 4%, rgba(122, 92, 255, .17), transparent 58%),
    radial-gradient(90% 70% at 2% 0%, rgba(39, 230, 214, .09), transparent 60%);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 44px);
  align-items: start;
}

.page-about .about-hero h1 {
  margin: 12px 0 0;
  font-size: clamp(29px, 5.4vw, 60px);
  font-weight: 900;
  line-height: 1.07;
  letter-spacing: -.024em;
  color: var(--c-text);
  max-width: 18ch;
}

.page-about .about-hero .lede {
  margin-top: 20px;
  max-width: 62ch;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(22px, 3vw, 32px);
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin-top: clamp(28px, 4vw, 46px);
  background: var(--c-grid);
  border: 1px solid var(--c-grid);
}

.page-about .hero-stat {
  background: var(--c-bg);
  padding: 16px 16px 18px;
}

.page-about .hero-stat__num {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: clamp(24px, 3.6vw, 34px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--c-cyan);
}

.page-about .hero-stat__unit {
  margin-left: 4px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--c-dim);
}

.page-about .hero-stat__label {
  display: block;
  margin-top: 10px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--c-dim);
}

.page-about .about-hero__panel {
  position: relative;
  min-height: 210px;
  border: 1px solid var(--c-grid);
  overflow: hidden;
  background:
    repeating-linear-gradient(90deg, var(--c-grid-soft) 0 1px, transparent 1px 32px),
    repeating-linear-gradient(0deg, var(--c-grid-soft) 0 1px, transparent 1px 32px),
    radial-gradient(circle at 50% 50%, rgba(39, 230, 214, .16), transparent 64%),
    var(--c-panel);
}

.page-about .about-hero__panel::before,
.page-about .about-hero__panel::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  aspect-ratio: 1;
}

.page-about .about-hero__panel::before {
  width: min(70%, 300px);
  border: 1px solid rgba(39, 230, 214, .4);
}

.page-about .about-hero__panel::after {
  width: min(38%, 164px);
  border: 1px solid rgba(122, 92, 255, .55);
}

.page-about .about-hero__figure {
  margin: clamp(30px, 5vw, 58px) 0 0;
}

.page-about .about-hero__figure .media-frame {
  max-width: 100%;
}

@media (min-width: 561px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
    gap: clamp(32px, 5vw, 76px);
  }

  .page-about .about-hero__panel {
    min-height: 400px;
  }
}

/* ============ 时间轴 ============ */
.page-about .tl-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 3.4vw, 44px);
  align-items: end;
}

.page-about .tl-title {
  margin: 12px 0 0;
  font-size: clamp(24px, 3.2vw, 40px);
  font-weight: 900;
  line-height: 1.16;
  letter-spacing: -.012em;
  max-width: 22ch;
}

.page-about .tl-head .lede {
  margin-top: 16px;
  max-width: 62ch;
}

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

.page-about .tl-figure .media-frame {
  max-width: 300px;
}

.page-about .tl-list {
  position: relative;
  list-style: none;
  margin: clamp(34px, 5vw, 64px) 0 0;
  padding: 0;
}

.page-about .tl-list::before {
  content: "";
  position: absolute;
  top: 10px;
  bottom: 60px;
  left: 19px;
  width: 1px;
  background: linear-gradient(180deg, var(--c-cyan), var(--c-violet) 48%, rgba(30, 42, 68, .1));
}

.page-about .tl-item {
  position: relative;
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 8px 16px;
  padding-bottom: clamp(30px, 5vw, 56px);
}

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

.page-about .tl-rail {
  grid-column: 1;
  grid-row: 1;
}

.page-about .tl-node {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--c-cyan);
  background: var(--c-bg);
  border: 1px solid var(--c-cyan);
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-about .tl-item:hover .tl-node,
.page-about .tl-item:focus-within .tl-node {
  background: var(--c-cyan);
  color: var(--c-bg);
}

.page-about .tl-body {
  grid-column: 2;
  grid-row: 1;
  padding-top: 4px;
}

.page-about .tl-kicker {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .18em;
  color: var(--c-violet);
}

.page-about .tl-heading {
  margin: 10px 0 0;
  font-size: clamp(18px, 2.3vw, 26px);
  font-weight: 800;
  line-height: 1.36;
  max-width: 26ch;
}

.page-about .tl-body > p:not(.tl-kicker) {
  margin: 12px 0 0;
  color: var(--c-dim);
  font-size: 14.5px;
  line-height: 1.85;
  max-width: 62ch;
}

.page-about .tl-marks {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  border-top: 1px solid var(--c-grid);
  max-width: 72ch;
}

.page-about .tl-marks li {
  position: relative;
  padding: 11px 0 11px 22px;
  border-bottom: 1px solid var(--c-grid);
  font-size: 14px;
  line-height: 1.72;
  color: var(--c-text);
}

.page-about .tl-marks li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 20px;
  width: 10px;
  height: 1px;
  background: var(--c-cyan);
}

@media (min-width: 768px) {
  .page-about .tl-list::before {
    left: 27px;
  }

  .page-about .tl-item {
    grid-template-columns: 56px minmax(0, 1fr);
    gap: 10px 30px;
  }

  .page-about .tl-node {
    width: 56px;
    height: 56px;
    font-size: 15px;
  }
}

@media (min-width: 860px) {
  .page-about .tl-head {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, .55fr);
  }

  .page-about .tl-figure {
    justify-self: end;
  }
}

@media (min-width: 1200px) {
  .page-about .tl-list {
    padding-left: 34px;
  }

  .page-about .tl-list::after {
    content: "阶段 01 — 03 · 沿时间推进";
    position: absolute;
    left: -6px;
    top: 4px;
    writing-mode: vertical-rl;
    font-family: var(--font-mono);
    font-size: 10.5px;
    letter-spacing: .32em;
    color: var(--c-dim);
    opacity: .8;
  }
}

/* ============ 能力演进 ============ */
.page-about .about-cap .lede {
  margin-top: 16px;
  max-width: 66ch;
}

.page-about .cap-list {
  list-style: none;
  margin: clamp(28px, 4vw, 48px) 0 0;
  padding: 0;
  border-top: 1px solid var(--c-grid);
}

.page-about .cap-row {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 6px 16px;
  padding: clamp(18px, 2.6vw, 26px) 0;
  border-bottom: 1px solid var(--c-grid);
  transition: background var(--dur) var(--ease);
}

.page-about .cap-row:hover {
  background: linear-gradient(90deg, rgba(39, 230, 214, .07), transparent 62%);
}

.page-about .cap-idx {
  grid-column: 1;
  grid-row: 1;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--c-cyan);
  padding-top: 3px;
}

.page-about .cap-name {
  grid-column: 2;
  grid-row: 1;
  margin: 0;
  font-size: clamp(16px, 2vw, 20px);
  font-weight: 800;
  line-height: 1.4;
}

.page-about .cap-desc {
  grid-column: 2;
  grid-row: 2;
  margin: 0;
  color: var(--c-dim);
  font-size: 14.5px;
  line-height: 1.85;
  max-width: 68ch;
}

@media (min-width: 900px) {
  .page-about .cap-row {
    grid-template-columns: 60px minmax(0, 230px) minmax(0, 1fr);
    gap: clamp(20px, 3vw, 52px);
    align-items: baseline;
  }

  .page-about .cap-idx {
    grid-column: 1;
    grid-row: 1;
  }

  .page-about .cap-name {
    grid-column: 2;
    grid-row: 1;
  }

  .page-about .cap-desc {
    grid-column: 3;
    grid-row: 1;
  }
}

/* ============ 服务覆盖 ============ */
.page-about .about-reach .lede {
  margin-top: 16px;
  max-width: 64ch;
}

.page-about .about-reach .data-band {
  margin-top: clamp(28px, 4vw, 46px);
}

.page-about .about-reach .data-unit {
  margin-left: 2px;
  font-size: .5em;
  color: var(--c-dim);
}

.page-about .reach-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 3.6vw, 48px);
  margin-top: clamp(28px, 4vw, 48px);
  align-items: start;
}

.page-about .reach-copy h3 {
  margin: 0 0 14px;
  font-size: clamp(17px, 2.1vw, 22px);
  font-weight: 800;
  line-height: 1.4;
  max-width: 24ch;
}

.page-about .reach-copy p {
  margin: 0 0 14px;
  color: var(--c-dim);
  font-size: 14.5px;
  line-height: 1.88;
  max-width: 60ch;
}

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

@media (min-width: 880px) {
  .page-about .reach-body {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, .98fr);
  }
}

/* ============ 团队与运营 ============ */
.page-about .about-crew .lede {
  margin-top: 16px;
  max-width: 64ch;
}

.page-about .crew-list {
  list-style: none;
  margin: clamp(28px, 4vw, 48px) 0 0;
  padding: 0;
  border-top: 1px solid var(--c-grid);
}

.page-about .crew-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
  padding: clamp(20px, 2.8vw, 28px) 0;
  border-bottom: 1px solid var(--c-grid);
}

.page-about .crew-name {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0;
  font-size: clamp(16px, 2vw, 20px);
  font-weight: 800;
  line-height: 1.35;
}

.page-about .crew-name::before {
  content: "";
  flex: 0 0 auto;
  width: 9px;
  height: 9px;
  background: var(--c-cyan);
}

.page-about .crew-desc {
  margin: 0;
  color: var(--c-dim);
  font-size: 14.5px;
  line-height: 1.86;
  max-width: 68ch;
}

@media (min-width: 760px) {
  .page-about .crew-row {
    grid-template-columns: minmax(0, 200px) minmax(0, 1fr);
    gap: clamp(20px, 3vw, 52px);
    align-items: baseline;
  }
}

/* ============ 公告与版本机制 ============ */
.page-about .about-signal .lede {
  margin-top: 16px;
  max-width: 62ch;
}

.page-about .mech-list {
  list-style: none;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin: clamp(28px, 4vw, 48px) 0 0;
  padding: 0;
  background: var(--c-grid);
  border: 1px solid var(--c-grid);
}

.page-about .mech-item {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: clamp(20px, 2.8vw, 28px);
  background: var(--c-panel);
  transition: background var(--dur) var(--ease);
}

.page-about .mech-item:hover {
  background: var(--c-panel-2);
}

.page-about .mech-key {
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--c-cyan);
}

.page-about .mech-title {
  margin: 0;
  font-size: clamp(16px, 1.9vw, 18px);
  font-weight: 800;
  line-height: 1.4;
}

.page-about .mech-desc {
  margin: 0;
  color: var(--c-dim);
  font-size: 13.8px;
  line-height: 1.82;
}

.page-about .mech-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: clamp(24px, 3.4vw, 36px) 0 0;
}

@media (min-width: 760px) {
  .page-about .mech-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1200px) {
  .page-about .mech-list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ============ 资质与联系 ============ */
.page-about .trust-panel {
  position: relative;
  padding: clamp(22px, 4vw, 48px);
  border: 1px solid var(--c-grid);
  border-left: 2px solid var(--c-cyan);
  background:
    linear-gradient(180deg, rgba(39, 230, 214, .055), transparent 46%),
    var(--c-panel);
}

.page-about .trust-panel h2 {
  max-width: 26ch;
}

.page-about .trust-intro {
  margin: 18px 0 0;
  color: var(--c-dim);
  font-size: 14.5px;
  line-height: 1.88;
  max-width: 66ch;
}

.page-about .trust-list {
  list-style: none;
  margin: clamp(22px, 3vw, 34px) 0 0;
  padding: 0;
  max-width: 74ch;
}

.page-about .trust-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 4px;
  padding: 13px 0;
  border-top: 1px solid var(--c-grid);
}

.page-about .trust-k {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .14em;
  color: var(--c-dim);
}

.page-about .trust-v {
  font-size: 15px;
  line-height: 1.62;
  color: var(--c-text);
  word-break: break-word;
}

.page-about .trust-note {
  margin: 22px 0 0;
  padding-left: 16px;
  border-left: 2px solid var(--c-violet);
  color: var(--c-dim);
  font-size: 13.8px;
  line-height: 1.82;
  max-width: 66ch;
}

.page-about .trust-cta {
  margin: clamp(22px, 3vw, 30px) 0 0;
}

@media (min-width: 620px) {
  .page-about .trust-item {
    grid-template-columns: minmax(0, 120px) minmax(0, 1fr);
    gap: 16px;
    align-items: baseline;
  }
}

/* ============ 接着看 ============ */
.page-about .next-links {
  list-style: none;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 0;
  background: var(--c-grid);
  border-top: 1px solid var(--c-grid);
  border-bottom: 1px solid var(--c-grid);
}

.page-about .next-links a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 20px 18px;
  background: var(--c-bg);
  color: var(--c-text);
  font-size: 14px;
  line-height: 1.5;
  text-decoration: none;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-about .next-links a::after {
  content: "→";
  flex: 0 0 auto;
  font-family: var(--font-mono);
  color: var(--c-cyan);
  transition: transform var(--dur) var(--ease);
}

.page-about .next-links a:hover,
.page-about .next-links a:focus-visible {
  background: var(--c-panel-2);
  color: var(--c-cyan);
}

.page-about .next-links a:hover::after,
.page-about .next-links a:focus-visible::after {
  transform: translateX(5px);
}

@media (min-width: 760px) {
  .page-about .next-links {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1100px) {
  .page-about .next-links {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ============ 通用图片约束 ============ */
.page-about img {
  max-width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}
<<<END>>>