.page-about {
  --about-card: rgba(255, 255, 255, 0.05);
  --about-ink-soft: rgba(10, 26, 47, 0.76);
  position: relative;
  color: var(--white);
  background:
    radial-gradient(90% 55% at 100% 0%, rgba(19, 42, 74, 0.95), transparent 62%),
    radial-gradient(70% 45% at 0% 22%, rgba(255, 106, 0, 0.10), transparent 66%),
    var(--ink);
}

/* ---------- 通用块内标题 ---------- */
.page-about .about-head {
  max-width: 62ch;
  margin-bottom: clamp(28px, 4vw, 52px);
}

.page-about .about-head h2 {
  margin: 0 0 0.55em;
  font-size: clamp(1.75rem, 4.4vw, 3.1rem);
  line-height: 1.12;
  font-weight: 900;
  letter-spacing: -0.015em;
}

.page-about .about-head .lede {
  margin: 0;
  color: var(--muted);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: -12% -6% auto -6%;
  height: 80%;
  pointer-events: none;
  background:
    radial-gradient(48% 72% at 84% 6%, rgba(255, 106, 0, 0.30), transparent 68%),
    radial-gradient(44% 64% at 4% -6%, rgba(155, 255, 59, 0.14), transparent 70%);
}

.page-about .about-hero > * {
  position: relative;
}

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

.page-about .about-hero__lead h1 {
  margin: 0.18em 0 0.5em;
  font-size: clamp(2.15rem, 7.2vw, 4.4rem);
  line-height: 1.05;
  font-weight: 900;
  letter-spacing: -0.02em;
}

.page-about .about-hero__accent {
  display: block;
  color: var(--orange);
}

.page-about .about-hero__lead .lede {
  max-width: 58ch;
  margin: 0;
  color: var(--muted);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 32px);
}

.page-about .about-hero__panel {
  padding: clamp(20px, 3vw, 30px);
}

.page-about .about-hero__panel-title {
  margin: 0 0 1.1em;
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--neon);
}

.page-about .about-hero__panel-row {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 0;
  border-top: 1px solid var(--line);
}

.page-about .about-hero__panel-row:first-of-type {
  padding-top: 0;
  border-top: 0;
}

.page-about .about-hero__num {
  font-size: clamp(1.5rem, 4.2vw, 2.1rem);
  font-weight: 700;
  line-height: 1.1;
  color: var(--white);
}

.page-about .about-hero__cap {
  font-size: 0.88rem;
  line-height: 1.6;
  color: var(--muted);
}

.page-about .about-hero__tiles {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: clamp(28px, 4vw, 52px);
}

.page-about .about-hero__tile {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.07), rgba(255, 255, 255, 0));
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-hero__tile:hover,
.page-about .about-hero__tile:focus-within {
  transform: translateY(-4px);
  border-color: var(--orange);
}

.page-about .about-hero__tile-num {
  font-size: clamp(1.35rem, 3.6vw, 1.9rem);
  font-weight: 700;
  color: var(--orange);
  line-height: 1.1;
}

.page-about .about-hero__tile-label {
  font-size: 0.86rem;
  line-height: 1.55;
  color: var(--muted);
}

/* ---------- 运营历程时间线 ---------- */
.page-about .about-trail {
  position: relative;
}

.page-about .about-trail::after {
  content: "";
  display: block;
  height: 2px;
  margin-top: clamp(32px, 5vw, 64px);
  background: linear-gradient(90deg, transparent, var(--orange), var(--neon), transparent);
  transform: skewY(-1.2deg);
  opacity: 0.75;
}

.page-about .timeline {
  position: relative;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: linear-gradient(180deg, var(--orange), rgba(155, 255, 59, 0.7) 62%, transparent);
  opacity: 0.55;
}

.page-about .timeline__item {
  position: relative;
  padding: 0 0 clamp(26px, 3.6vw, 42px) 40px;
}

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--ink-2);
  border: 2px solid var(--orange);
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about .timeline__item:hover::before {
  border-color: var(--neon);
  box-shadow: 0 0 0 5px rgba(155, 255, 59, 0.14);
}

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

.page-about .timeline__stage {
  margin: 0 0 0.5em;
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--neon);
}

.page-about .timeline__title {
  margin: 0 0 0.5em;
  font-size: clamp(1.1rem, 2.8vw, 1.55rem);
  font-weight: 800;
  line-height: 1.3;
}

.page-about .timeline__text {
  max-width: 62ch;
  margin: 0;
  color: var(--muted);
}

/* ---------- 服务范围（浅色分区） ---------- */
.page-about .about-scope {
  color: var(--ink);
  background: linear-gradient(150deg, var(--ice) 0%, #D3E4FF 100%);
}

.page-about .about-scope h2 {
  color: var(--ink);
}

.page-about .about-scope .eyebrow {
  color: var(--orange);
}

.page-about .about-scope .lede {
  color: var(--about-ink-soft);
}

.page-about .scope-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 48px);
  align-items: center;
}

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

.page-about .scope-figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--r-lg);
  object-fit: cover;
}

.page-about .scope-figure figcaption,
.page-about .team-figure figcaption {
  margin-top: 12px;
  font-size: 0.83rem;
  line-height: 1.7;
  color: var(--about-ink-soft);
}

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

.page-about .scope-list li {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding: 14px 16px;
  border: 1px solid rgba(10, 26, 47, 0.12);
  border-radius: var(--r-md);
  background: rgba(255, 255, 255, 0.72);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .scope-list li:hover {
  transform: translateX(4px);
  border-color: var(--orange);
}

.page-about .scope-list__key {
  font-size: 0.95rem;
  font-weight: 800;
  color: var(--ink);
}

.page-about .scope-list__val {
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--about-ink-soft);
}

.page-about .scope-map {
  margin-top: clamp(28px, 4vw, 48px);
}

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

.page-about .scope-map__arc {
  stroke: rgba(10, 26, 47, 0.16);
  stroke-width: 1.5;
  stroke-dasharray: 6 8;
}

.page-about .scope-map__node .scope-map__halo {
  fill: var(--orange);
  opacity: 0.16;
  transition: opacity var(--dur) var(--ease);
}

.page-about .scope-map__node .scope-map__dot {
  fill: var(--orange);
}

.page-about .scope-map__node:hover .scope-map__halo {
  opacity: 0.42;
}

.page-about .scope-map__label {
  fill: rgba(10, 26, 47, 0.82);
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 600;
  text-anchor: middle;
}

/* ---------- 团队 ---------- */
.page-about .team-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 48px);
  align-items: start;
}

.page-about .team-roles {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .team-role {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: linear-gradient(160deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.02));
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .team-role:hover,
.page-about .team-role:focus-within {
  transform: translateY(-4px);
  border-color: var(--orange-2);
}

.page-about .team-role__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 3.8vw, 2.1rem);
  font-weight: 700;
  line-height: 1.1;
  color: var(--neon);
}

.page-about .team-role__name {
  display: block;
  margin-top: 4px;
  font-size: 1rem;
  font-weight: 700;
}

.page-about .team-role__desc {
  margin: 8px 0 0;
  font-size: 0.86rem;
  line-height: 1.7;
  color: var(--muted);
}

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

.page-about .team-figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--r-lg);
  object-fit: cover;
}

/* ---------- 资质与荣誉 ---------- */
.page-about .about-cred__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 48px);
  align-items: center;
}

.page-about .about-cred__figure {
  margin: 0;
}

.page-about .about-cred__figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--r-lg);
  object-fit: cover;
}

.page-about .about-cred__copy h2 {
  margin: 0.18em 0 0.55em;
  font-size: clamp(1.65rem, 4vw, 2.7rem);
  line-height: 1.14;
  font-weight: 900;
  letter-spacing: -0.015em;
}

.page-about .about-cred__copy .lede {
  margin: 0 0 clamp(20px, 3vw, 32px);
  color: var(--muted);
}

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

.page-about .cred-list li {
  position: relative;
  padding: 16px 18px 16px 52px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--about-card);
  transition: border-color var(--dur) var(--ease);
}

.page-about .cred-list li:hover {
  border-color: var(--orange);
}

.page-about .cred-list li::before {
  content: "";
  position: absolute;
  left: 20px;
  top: 22px;
  width: 14px;
  height: 14px;
  border-radius: 4px;
  background: linear-gradient(135deg, var(--orange), var(--neon));
}

.page-about .cred-list__name {
  display: block;
  font-weight: 700;
}

.page-about .cred-list__desc {
  display: block;
  margin-top: 4px;
  font-size: 0.87rem;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 合作生态 ---------- */
.page-about .partner-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .partner-card {
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: linear-gradient(150deg, rgba(19, 42, 74, 0.92), rgba(10, 26, 47, 0.6));
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .partner-card:hover,
.page-about .partner-card:focus-within {
  transform: translateY(-4px);
  border-color: var(--neon);
}

.page-about .partner-card__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.4rem, 3.4vw, 1.9rem);
  font-weight: 700;
  line-height: 1.1;
  color: var(--orange);
}

.page-about .partner-card__name {
  display: block;
  margin-top: 6px;
  font-weight: 700;
}

.page-about .partner-card__desc {
  margin: 8px 0 0;
  font-size: 0.86rem;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 更新节奏与规模 ---------- */
.page-about .rhythm-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 48px);
  align-items: start;
}

.page-about .rhythm-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.page-about .rhythm-stat {
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--about-card);
}

.page-about .rhythm-stat__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.55rem, 4vw, 2.35rem);
  font-weight: 700;
  line-height: 1.08;
  color: var(--white);
}

.page-about .rhythm-stat__label {
  display: block;
  margin-top: 6px;
  font-size: 0.85rem;
  color: var(--muted);
}

.page-about .rhythm-list {
  display: grid;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .rhythm-list li {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 15px 0;
  border-bottom: 1px solid var(--line);
  font-size: 0.95rem;
}

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

.page-about .rhythm-list__key {
  font-weight: 600;
  color: var(--white);
}

.page-about .rhythm-list__val {
  font-family: var(--font-mono);
  font-size: 0.86rem;
  white-space: nowrap;
  color: var(--neon);
}

.page-about .rhythm-note {
  margin: clamp(24px, 3.4vw, 40px) 0 0;
  max-width: 66ch;
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .rhythm-note a {
  color: var(--orange-2);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.page-about .rhythm-note a:hover {
  color: var(--neon);
}

/* ---------- 收尾 ---------- */
.page-about .about-cta__inner {
  display: grid;
  gap: clamp(20px, 3vw, 32px);
  padding: clamp(26px, 5vw, 56px);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: linear-gradient(135deg, rgba(255, 106, 0, 0.20), rgba(155, 255, 59, 0.10) 55%, rgba(19, 42, 74, 0.65));
}

.page-about .about-cta__inner h2 {
  margin: 0 0 0.5em;
  font-size: clamp(1.6rem, 4vw, 2.5rem);
  font-weight: 900;
  line-height: 1.14;
  letter-spacing: -0.015em;
}

.page-about .about-cta__inner .lede {
  margin: 0;
  max-width: 60ch;
  color: rgba(255, 255, 255, 0.82);
}

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

/* ---------- 响应式 ---------- */
@media (min-width: 620px) {
  .page-about .scope-list li {
    grid-template-columns: 108px minmax(0, 1fr);
    gap: 14px;
    align-items: baseline;
  }
}

@media (min-width: 760px) {
  .page-about .about-hero__tiles {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

@media (min-width: 860px) {
  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1.35fr) auto;
    align-items: center;
  }

  .page-about .about-cta__actions {
    justify-content: flex-end;
  }

  .page-about .timeline__item {
    display: grid;
    grid-template-columns: 140px minmax(0, 1fr);
    column-gap: 28px;
    align-items: start;
    padding-left: 52px;
  }

  .page-about .timeline__stage {
    grid-column: 1;
    grid-row: 1 / span 2;
    padding-top: 6px;
    margin-bottom: 0;
  }

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

  .page-about .timeline__text {
    grid-column: 2;
    grid-row: 2;
  }

  .page-about .timeline::before {
    left: 7px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.82fr);
  }

  .page-about .scope-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  }

  .page-about .team-grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  }

  .page-about .about-cred__grid {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  }

  .page-about .rhythm-grid {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  }
}

@media (max-width: 419px) {
  .page-about .rhythm-list li {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
  }

  .page-about .rhythm-list__val {
    white-space: normal;
  }

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

  .page-about .partner-grid {
    grid-template-columns: minmax(0, 1fr);
  }
}
<<<END>>>
</main>