.page-about {
  --about-rule: rgba(100, 112, 140, 0.34);
  --about-body: var(--parchment-muted);
  --about-max: 34em;
  position: relative;
  background: var(--void-indigo);
  color: var(--warm-paper);
  font-family: var(--font-body);
  overflow-x: hidden;
}

.page-about h1,
.page-about h2,
.page-about h3,
.page-about p,
.page-about ul,
.page-about ol,
.page-about figure {
  margin: 0;
}

.page-about ul,
.page-about ol {
  padding: 0;
  list-style: none;
}

.page-about .shell {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* ---------- 通用排版件 ---------- */
.page-about .about-kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  color: var(--neon-cyan);
}

.page-about .about-kicker__dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--neon-cyan);
  box-shadow: 0 0 12px var(--neon-cyan);
}

.page-about .about-h2 {
  margin-top: 0.9rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.7rem, 4.6vw, 2.9rem);
  line-height: 1.1;
  letter-spacing: -0.018em;
  color: var(--warm-paper);
  max-width: 22em;
}

.page-about .about-lede {
  margin-top: 1.1rem;
  max-width: var(--about-max);
  font-size: 1rem;
  line-height: 1.85;
  color: var(--about-body);
}

.page-about .about-section-head {
  margin-bottom: clamp(2rem, 5vw, 3.2rem);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(1.5rem, 4vw, 3rem) clamp(3.5rem, 8vw, 6.5rem);
  background:
    radial-gradient(120% 90% at 88% -12%, rgba(139, 108, 255, 0.22), transparent 62%),
    radial-gradient(90% 70% at 6% 108%, rgba(56, 242, 225, 0.10), transparent 60%),
    var(--void-indigo);
}

.page-about .about-hero::before {
  content: "2018";
  position: absolute;
  right: -0.05em;
  bottom: -0.16em;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(8rem, 30vw, 24rem);
  line-height: 0.78;
  letter-spacing: -0.04em;
  color: transparent;
  -webkit-text-stroke: 1px rgba(100, 112, 140, 0.22);
  pointer-events: none;
  user-select: none;
}

.page-about .about-hero__shell {
  position: relative;
  z-index: 1;
}

.page-about .about-hero__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(2rem, 5vw, 3.5rem);
}

.page-about .about-hero__title {
  margin-top: 1.1rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.2rem, 7.4vw, 4.4rem);
  line-height: 1.03;
  letter-spacing: -0.025em;
  color: var(--warm-paper);
  text-shadow: 0 0 44px rgba(56, 242, 225, 0.16);
}

.page-about .about-hero__lede {
  margin-top: 1.35rem;
  max-width: var(--about-max);
  font-size: 1rem;
  line-height: 1.9;
  color: var(--about-body);
}

.page-about .about-hero__stat-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem 1.25rem;
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--about-rule);
}

.page-about .about-stat {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  min-width: 0;
}

.page-about .about-stat__num {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.6rem, 4.6vw, 2.3rem);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--warm-paper);
}

.page-about .about-stat__num em {
  font-style: normal;
  font-size: 0.55em;
  margin-left: 0.12em;
  color: var(--neon-cyan);
}

.page-about .about-stat__label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--about-body);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 2rem;
}

.page-about .about-hero__media {
  position: relative;
  padding: 9px;
  background: linear-gradient(150deg, rgba(56, 242, 225, 0.30), rgba(139, 108, 255, 0.20) 55%, rgba(56, 242, 225, 0.04));
  border-radius: 2px 72px 2px 72px;
}

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 10 / 7;
  object-fit: cover;
  border-radius: 2px 64px 2px 64px;
}

.page-about .about-hero__note {
  display: block;
  margin-top: 0.8rem;
  padding-left: 0.2rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  line-height: 1.6;
  color: var(--about-body);
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  padding-block: clamp(3rem, 8vw, 6rem);
  background: linear-gradient(180deg, var(--void-indigo), var(--deep-blue) 40%, var(--deep-blue) 90%, var(--void-indigo));
}

.page-about .about-timeline__list {
  display: grid;
  gap: 0;
}

.page-about .about-timeline__item {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.7rem;
  padding: 1.5rem 0 1.5rem 1.35rem;
  border-left: 2px solid var(--about-rule);
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -7px;
  top: 2.05rem;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--void-indigo);
  border: 2px solid var(--line-strong);
}

.page-about .about-timeline__year {
  display: flex;
  align-items: baseline;
  gap: 0.7rem;
}

.page-about .about-timeline__num {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2rem, 6vw, 3.2rem);
  line-height: 1;
  letter-spacing: -0.03em;
  color: transparent;
  -webkit-text-stroke: 1px rgba(243, 233, 215, 0.55);
}

.page-about .about-timeline__phase {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  color: var(--electric-purple);
  white-space: nowrap;
}

.page-about .about-timeline__body h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  line-height: 1.35;
  letter-spacing: 0.005em;
  color: var(--warm-paper);
}

.page-about .about-timeline__body p {
  margin-top: 0.55rem;
  max-width: var(--about-max);
  font-size: 0.95rem;
  line-height: 1.82;
  color: var(--about-body);
}

.page-about .about-timeline__figure {
  margin-top: clamp(2rem, 5vw, 3rem);
  padding: 8px;
  border: 1px solid var(--about-rule);
  border-radius: 2px 40px 2px 40px;
}

.page-about .about-timeline__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 8 / 5;
  object-fit: cover;
  border-radius: 2px 34px 2px 34px;
}

.page-about .about-timeline__figure figcaption {
  margin-top: 0.7rem;
  padding-inline: 0.3rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  line-height: 1.6;
  color: var(--about-body);
}

@supports (animation-timeline: view()) {
  .page-about .about-timeline__item {
    animation: about-tl-line linear both;
    animation-timeline: view();
    animation-range: cover 0% cover 100%;
  }

  @keyframes about-tl-line {
    0% { border-left-color: var(--about-rule); }
    22% { border-left-color: var(--neon-cyan); }
    68% { border-left-color: var(--neon-cyan); }
    100% { border-left-color: var(--about-rule); }
  }
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  padding-block: clamp(3rem, 8vw, 6rem);
  background: var(--void-indigo);
}

.page-about .about-team__layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.75rem, 4vw, 2.75rem);
}

.page-about .about-team__media {
  align-self: start;
  padding: 8px;
  background: linear-gradient(160deg, rgba(139, 108, 255, 0.24), rgba(56, 242, 225, 0.10));
  border-radius: 40px 2px 40px 2px;
}

.page-about .about-team__media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border-radius: 34px 2px 34px 2px;
}

.page-about .about-team__media figcaption {
  margin-top: 0.7rem;
  padding-inline: 0.35rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  line-height: 1.6;
  color: var(--about-body);
}

.page-about .about-role {
  --role-tone: var(--neon-cyan);
  --role-bg: rgba(56, 242, 225, 0.08);
  margin-bottom: 0.85rem;
  padding: 0.95rem 1.05rem;
  background: var(--role-bg);
  border-left: 3px solid var(--role-tone);
  border-radius: 0 18px 0 18px;
}

.page-about .about-role:nth-of-type(1) {
  --role-tone: var(--neon-cyan);
  --role-bg: rgba(56, 242, 225, 0.08);
}

.page-about .about-role:nth-of-type(2) {
  --role-tone: var(--electric-purple);
  --role-bg: rgba(139, 108, 255, 0.11);
}

.page-about .about-role:nth-of-type(3) {
  --role-tone: var(--signal-orange);
  --role-bg: rgba(255, 90, 54, 0.09);
}

.page-about .about-role:nth-of-type(4) {
  --role-tone: var(--focus-gold);
  --role-bg: rgba(255, 209, 102, 0.08);
}

.page-about .about-role__summary {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  min-height: 44px;
  cursor: pointer;
  list-style: none;
}

.page-about .about-role__summary::-webkit-details-marker {
  display: none;
}

.page-about .about-role__summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 1.05rem;
  line-height: 1;
  color: var(--role-tone);
}

.page-about .about-role[open] .about-role__summary::after {
  content: "–";
}

.page-about .about-role__index {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--role-tone);
}

.page-about .about-role__name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.2rem;
  letter-spacing: 0.01em;
  color: var(--warm-paper);
}

.page-about .about-role__count {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--about-body);
}

.page-about .about-role__body {
  padding-top: 0.75rem;
  border-top: 1px solid var(--about-rule);
  margin-top: 0.6rem;
}

.page-about .about-role__tags {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.05em;
  line-height: 1.7;
  color: var(--role-tone);
}

.page-about .about-role__body p + p,
.page-about .about-role__tags + p {
  margin-top: 0.55rem;
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--about-body);
}

/* ---------- 工序 ---------- */
.page-about .about-process {
  padding-block: clamp(3rem, 8vw, 6rem);
  background: var(--deep-blue);
}

.page-about .about-process__track {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  border-top: 1px solid var(--about-rule);
}

.page-about .about-step {
  --step-tone: var(--neon-cyan);
  position: relative;
  padding: 1.35rem 0;
  border-bottom: 1px solid var(--about-rule);
}

.page-about .about-step:nth-child(2) { --step-tone: var(--electric-purple); }
.page-about .about-step:nth-child(3) { --step-tone: var(--signal-orange); }
.page-about .about-step:nth-child(4) { --step-tone: var(--focus-gold); }
.page-about .about-step:nth-child(5) { --step-tone: var(--signal-green); }

.page-about .about-step::before {
  content: "";
  display: block;
  width: 2.1rem;
  height: 3px;
  margin-bottom: 0.85rem;
  background: var(--step-tone);
}

.page-about .about-step__index {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--step-tone);
}

.page-about .about-step h3 {
  margin-top: 0.3rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: 0.01em;
  color: var(--warm-paper);
}

.page-about .about-step p {
  margin-top: 0.45rem;
  max-width: 22em;
  font-size: 0.9rem;
  line-height: 1.78;
  color: var(--about-body);
}

/* ---------- 移动优先 ---------- */
.page-about .about-mobile {
  padding-block: clamp(3rem, 8vw, 6rem);
  background: var(--void-indigo);
}

.page-about .about-mobile__panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.5rem, 4vw, 2.5rem);
  padding: clamp(1.4rem, 4vw, 2.6rem);
  background: linear-gradient(135deg, rgba(13, 24, 48, 0.92), rgba(7, 11, 22, 0.55));
  border: 1px solid var(--about-rule);
  border-radius: 2px 46px 2px 46px;
}

.page-about .about-mobile__figure {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  padding-bottom: 1.2rem;
  border-bottom: 1px solid var(--about-rule);
}

.page-about .about-mobile__num {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(3.4rem, 12vw, 5.6rem);
  line-height: 0.92;
  letter-spacing: -0.04em;
  color: var(--warm-paper);
}

.page-about .about-mobile__num em {
  font-style: normal;
  font-size: 0.42em;
  margin-left: 0.1em;
  color: var(--neon-cyan);
}

.page-about .about-mobile__caption {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  color: var(--about-body);
}

.page-about .about-mobile__points h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.15rem, 3.2vw, 1.45rem);
  line-height: 1.35;
  color: var(--warm-paper);
}

.page-about .about-mobile__points p {
  margin-top: 0.7rem;
  max-width: var(--about-max);
  font-size: 0.95rem;
  line-height: 1.85;
  color: var(--about-body);
}

.page-about .about-mobile__list {
  margin-top: 1.2rem;
  display: grid;
  gap: 0.55rem;
}

.page-about .about-mobile__list li {
  position: relative;
  padding-left: 1.15rem;
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--about-body);
}

.page-about .about-mobile__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--electric-purple);
}

/* ---------- 合作生态 ---------- */
.page-about .about-partners {
  padding-block: clamp(3rem, 8vw, 6rem);
  background: linear-gradient(180deg, var(--void-indigo), var(--deep-blue));
}

.page-about .about-partners__list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  border-top: 1px solid var(--about-rule);
}

.page-about .about-partner {
  padding: 1.35rem 0;
  border-bottom: 1px solid var(--about-rule);
}

.page-about .about-partner__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.page-about .about-partner__head h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.2rem;
  letter-spacing: 0.01em;
  color: var(--warm-paper);
}

.page-about .about-partner p {
  margin-top: 0.55rem;
  max-width: 30em;
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--about-body);
}

/* ---------- 收尾 ---------- */
.page-about .about-cta {
  position: relative;
  padding-block: clamp(3rem, 8vw, 6rem);
  background:
    radial-gradient(90% 120% at 90% 0%, rgba(56, 242, 225, 0.14), transparent 60%),
    linear-gradient(160deg, var(--deep-blue), var(--void-indigo));
  clip-path: polygon(0 0, 100% 2.5rem, 100% 100%, 0 100%);
}

.page-about .about-cta__shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.75rem;
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-content: start;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-hero__stat-row {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-partners__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 2.25rem;
  }

  .page-about .about-partner:nth-child(odd) {
    padding-right: 1rem;
  }

  .page-about .about-mobile__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 1.5rem;
  }
}

@media (min-width: 760px) {
  .page-about .about-process__track {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .page-about .about-step {
    padding: 1.4rem 1rem;
    border-bottom: none;
    border-left: 1px solid var(--about-rule);
  }

  .page-about .about-step:first-child {
    padding-left: 0;
    border-left: 0;
  }

  .page-about .about-step:last-child {
    padding-right: 0;
  }

  .page-about .about-mobile__panel {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    align-items: start;
  }

  .page-about .about-mobile__figure {
    padding-bottom: 0;
    border-bottom: 0;
    border-right: 1px solid var(--about-rule);
    padding-right: 1.5rem;
  }

  .page-about .about-cta__shell {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
  }

  .page-about .about-timeline__item {
    grid-template-columns: minmax(0, 9rem) minmax(0, 1fr);
    gap: 2.5rem;
    padding: 1.75rem 0 1.75rem 2rem;
  }

  .page-about .about-timeline__year {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.35rem;
  }

  .page-about .about-timeline__item::before {
    top: 2.35rem;
  }
}

@media (min-width: 960px) {
  .page-about .about-team__layout {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    align-items: start;
  }

  .page-about .about-team__media {
    position: sticky;
    top: 6rem;
  }
}

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

  .page-about .about-partner {
    padding: 0 1.5rem;
    border-left: 1px solid var(--about-rule);
  }

  .page-about .about-partner:first-child {
    padding-left: 0;
    border-left: 0;
  }

  .page-about .about-partner:last-child {
    padding-right: 0;
  }

  .page-about .about-partner__head {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.55rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}
<<<END>>>