.page-about {
  --about-pad: clamp(56px, 9vw, 108px);
  --about-rule: 1px solid var(--line-500);
  background: var(--ink-950);
  color: var(--paper-050);
  overflow-x: hidden;
}

.page-about h1,
.page-about h2,
.page-about h3 {
  font-family: var(--font-display);
  letter-spacing: -0.02em;
  line-height: 1.12;
  margin: 0;
}

.page-about .eyebrow {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--lime-200);
  margin: 0 0 10px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding-block: clamp(36px, 6vw, 76px) clamp(48px, 8vw, 96px);
  background:
    radial-gradient(120% 90% at 84% -10%, rgba(199, 255, 62, 0.16), transparent 58%),
    radial-gradient(80% 70% at 0% 100%, rgba(255, 138, 61, 0.1), transparent 60%),
    linear-gradient(180deg, var(--ink-950) 0%, var(--ink-900) 100%);
  overflow: hidden;
}

.page-about .about-hero__inner {
  display: grid;
  gap: 32px;
  align-items: center;
}

.page-about .about-hero h1 {
  font-size: clamp(2.1rem, 6vw, 4.2rem);
  margin: 0 0 20px;
  max-width: 20ch;
}

.page-about .about-hero__lead {
  max-width: 52ch;
  margin: 0;
  color: var(--mist-300);
  font-size: 0.98rem;
  line-height: 1.85;
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-block: 28px;
  background: var(--line-500);
  border: var(--about-rule);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.page-about .about-stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 14px;
  background: var(--panel-800);
}

.page-about .about-stat__num {
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: clamp(1.35rem, 3vw, 1.9rem);
  color: var(--lime-400);
  font-variant-numeric: tabular-nums lining-nums;
}

.page-about .about-stat__label {
  font-size: 0.76rem;
  color: var(--mist-300);
  letter-spacing: 0.02em;
}

.page-about .about-hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 0;
}

.page-about .about-hero__media {
  margin: 0;
  aspect-ratio: 14 / 9;
  border-radius: var(--radius-md);
  clip-path: polygon(0 4%, 100% 0, 100% 100%, 0 96%);
  box-shadow: 0 18px 40px -24px rgba(0, 0, 0, 0.9);
}

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  max-width: 100%;
}

/* ---------- 品牌故事 ---------- */
.page-about .about-story {
  padding-block: var(--about-pad);
  background: var(--ink-900);
}

.page-about .about-story__panel {
  position: relative;
  padding: clamp(24px, 4vw, 48px) clamp(20px, 4vw, 52px);
  border: var(--about-rule);
  border-left: 3px solid var(--lime-400);
  border-radius: var(--radius-md);
  background: linear-gradient(160deg, var(--panel-800) 0%, var(--ink-900) 78%);
}

.page-about .about-story__index {
  position: absolute;
  top: clamp(16px, 3vw, 28px);
  right: clamp(18px, 3vw, 32px);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 800;
  color: var(--edge-700);
  letter-spacing: 0.1em;
}

.page-about .about-story h2 {
  font-size: clamp(1.5rem, 3.6vw, 2.6rem);
  margin-bottom: 22px;
  max-width: 26ch;
}

.page-about .about-story__body {
  display: grid;
  gap: 18px;
}

.page-about .about-story__body p {
  margin: 0;
  color: var(--mist-300);
  font-size: 0.96rem;
  line-height: 1.85;
}

/* ---------- 通用章节头 ---------- */
.page-about .about-section-head {
  max-width: 62ch;
  margin-bottom: clamp(24px, 4vw, 40px);
}

.page-about .about-section-head h2 {
  font-size: clamp(1.5rem, 3.8vw, 2.6rem);
  margin-bottom: 12px;
}

.page-about .about-section-head__lead {
  margin: 0;
  color: var(--mist-300);
  font-size: 0.94rem;
  line-height: 1.8;
}

/* ---------- 发展坐标 ---------- */
.page-about .about-timeline {
  padding-block: var(--about-pad);
  background:
    linear-gradient(180deg, var(--ink-950) 0%, var(--ink-900) 100%);
}

.page-about .about-years {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: clamp(24px, 4vw, 36px);
}

.page-about .about-years a {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.86rem;
  letter-spacing: 0.06em;
  padding: 8px 18px;
  border: 1px solid var(--edge-700);
  border-radius: 999px;
  color: var(--lime-200);
  text-decoration: none;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-years a:hover,
.page-about .about-years a:focus-visible {
  background: var(--lime-400);
  border-color: var(--lime-400);
  color: var(--ink-950);
}

.page-about .about-track {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 20px;
}

.page-about .about-track__item {
  position: relative;
  padding-left: 20px;
  border-left: 1px solid var(--line-500);
  display: grid;
  gap: 8px;
}

.page-about .about-track__item::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 8px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--edge-700);
  transition: background var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about .about-track__item:target::before,
.page-about .about-track__item:hover::before {
  background: var(--lime-400);
  box-shadow: 0 0 0 5px rgba(199, 255, 62, 0.14);
}

.page-about .about-track__year {
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: 1.28rem;
  letter-spacing: 0.02em;
  color: var(--lime-400);
  font-variant-numeric: tabular-nums lining-nums;
}

.page-about .about-track__card h3 {
  font-size: 1.02rem;
  margin-bottom: 8px;
  color: var(--paper-050);
}

.page-about .about-track__card p {
  margin: 0;
  color: var(--mist-300);
  font-size: 0.93rem;
  line-height: 1.8;
}

.page-about .about-timeline__figure {
  margin: clamp(32px, 5vw, 56px) 0 0;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: var(--about-rule);
}

.page-about .about-timeline__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  max-width: 100%;
  opacity: 0.86;
}

.page-about .about-timeline__figure figcaption {
  padding: 12px 16px;
  font-size: 0.78rem;
  color: var(--mist-300);
  background: var(--panel-800);
  border-top: var(--about-rule);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  padding-block: var(--about-pad);
  background: linear-gradient(180deg, var(--ink-900) 0%, var(--ink-950) 100%);
}

.page-about .about-team__grid {
  display: grid;
  gap: 28px;
}

.page-about .about-team__media {
  margin: 0;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: var(--about-rule);
  aspect-ratio: 3 / 2;
}

.page-about .about-team__media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  max-width: 100%;
}

.page-about .about-role {
  border: var(--about-rule);
  border-radius: var(--radius-md);
  background: var(--panel-800);
  margin-bottom: 12px;
  overflow: hidden;
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .about-role:last-child {
  margin-bottom: 0;
}

.page-about .about-role[open] {
  border-color: var(--edge-700);
  background: linear-gradient(140deg, var(--panel-800), var(--ink-900));
}

.page-about .about-role summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 15px 18px;
  cursor: pointer;
  list-style: none;
  font-weight: 700;
  font-size: 0.98rem;
  color: var(--paper-050);
}

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

.page-about .about-role summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 1.15rem;
  line-height: 1;
  color: var(--lime-400);
  transition: transform var(--dur) var(--ease);
}

.page-about .about-role[open] summary::after {
  content: "\2013";
}

.page-about .about-role__count {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-weight: 700;
  color: var(--orange-500);
  letter-spacing: 0.04em;
}

.page-about .about-role p {
  margin: 0;
  padding: 0 18px 18px;
  color: var(--mist-300);
  font-size: 0.92rem;
  line-height: 1.8;
  border-top: 1px dashed var(--line-500);
  padding-top: 14px;
}

/* ---------- 流程 ---------- */
.page-about .about-process {
  padding-block: var(--about-pad);
  background: var(--ink-950);
}

.page-about .about-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .about-steps li {
  position: relative;
  padding: 20px 18px 22px;
  border: var(--about-rule);
  border-radius: var(--radius-md);
  background: linear-gradient(170deg, var(--panel-800) 0%, var(--ink-900) 100%);
}

.page-about .about-step__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--orange-500);
  margin-bottom: 10px;
}

.page-about .about-steps h3 {
  font-size: 1rem;
  margin-bottom: 8px;
  color: var(--lime-200);
}

.page-about .about-steps p {
  margin: 0;
  color: var(--mist-300);
  font-size: 0.9rem;
  line-height: 1.78;
}

/* ---------- 合作生态 ---------- */
.page-about .about-partners {
  padding-block: var(--about-pad);
  background: linear-gradient(180deg, var(--ink-900) 0%, var(--ink-950) 100%);
}

.page-about .about-partners__grid {
  display: grid;
  gap: 18px;
  margin-top: 8px;
}

.page-about .about-partners__grid article {
  padding-top: 18px;
  border-top: 2px solid var(--edge-700);
}

.page-about .about-partners__grid h3 {
  font-size: 1.05rem;
  margin-bottom: 10px;
  color: var(--paper-050);
}

.page-about .about-partners__grid p {
  margin: 0;
  color: var(--mist-300);
  font-size: 0.92rem;
  line-height: 1.8;
}

.page-about .about-partners__note {
  margin: clamp(26px, 4vw, 40px) 0 0;
  padding: 16px 18px;
  border-left: 3px solid var(--orange-500);
  background: var(--panel-800);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 0.92rem;
  color: var(--paper-050);
  line-height: 1.8;
}

.page-about .about-partners__note a {
  color: var(--lime-400);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .about-partners__note a:hover,
.page-about .about-partners__note a:focus-visible {
  color: var(--lime-200);
}

/* ---------- 长期方向 ---------- */
.page-about .about-longterm {
  padding-block: var(--about-pad);
  background:
    radial-gradient(90% 70% at 100% 0%, rgba(199, 255, 62, 0.1), transparent 62%),
    linear-gradient(150deg, var(--panel-800) 0%, var(--ink-950) 72%);
  border-top: var(--about-rule);
}

.page-about .about-longterm__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 20px;
}

.page-about .about-longterm__list li {
  padding-left: 18px;
  border-left: 1px solid var(--line-500);
}

.page-about .about-longterm__list h3 {
  font-size: 1rem;
  margin-bottom: 8px;
  color: var(--lime-200);
}

.page-about .about-longterm__list p {
  margin: 0;
  color: var(--mist-300);
  font-size: 0.92rem;
  line-height: 1.8;
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-story__body {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px 32px;
  }

  .page-about .about-story__body p:first-child {
    grid-column: 1 / -1;
  }

  .page-about .about-partners__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
  }
}

@media (min-width: 860px) {
  .page-about .about-track {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 28px 32px;
    padding-bottom: 40px;
  }

  .page-about .about-track__item {
    border-left: 0;
    border-top: 1px solid var(--line-500);
    padding: 20px 0 0;
  }

  .page-about .about-track__item::before {
    left: 0;
    top: -5px;
  }

  .page-about .about-track__item:nth-child(even) {
    transform: translateY(34px);
  }

  .page-about .about-steps {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 18px;
  }

  .page-about .about-steps li:not(:last-child)::after {
    content: "";
    position: absolute;
    top: 50%;
    right: -19px;
    width: 20px;
    height: 1px;
    background: var(--edge-700);
  }

  .page-about .about-longterm__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 26px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__inner {
    grid-template-columns: 7fr 5fr;
    gap: 52px;
  }

  .page-about .about-hero h1 {
    max-width: 18ch;
  }

  .page-about .about-team__grid {
    grid-template-columns: 5fr 7fr;
    gap: 40px;
    align-items: start;
  }

  .page-about .about-team__media {
    position: sticky;
    top: calc(var(--header-h) + 24px);
  }
}

@media (min-width: 1120px) {
  .page-about .about-story__panel {
    padding: 56px 64px;
  }

  .page-about .about-hero__lead {
    font-size: 1.02rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-track__item:nth-child(even) {
    transform: none;
  }
}
<<<END>>>