.page-about {
  --about-ink-line: rgba(37, 26, 20, 0.16);
  --about-cyan-soft: rgba(0, 229, 255, 0.28);
  --about-violet-soft: rgba(108, 43, 255, 0.32);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding-top: 22px;
  padding-bottom: 44px;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: -18% -14% auto -14%;
  height: 560px;
  background-image:
    linear-gradient(90deg, var(--sg-line-soft) 1px, transparent 1px),
    linear-gradient(180deg, var(--sg-line-soft) 1px, transparent 1px);
  background-size: 68px 68px;
  -webkit-mask-image: radial-gradient(120% 88% at 46% 0%, #000 6%, transparent 76%);
  mask-image: radial-gradient(120% 88% at 46% 0%, #000 6%, transparent 76%);
  pointer-events: none;
}

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

.page-about .about-hero__grid {
  display: grid;
  gap: 30px;
}

.page-about .about-hero__title {
  margin: 14px 0 18px;
  font-family: var(--sg-sans);
  font-weight: 900;
  font-size: clamp(1.95rem, 6.6vw, 3.9rem);
  line-height: 1.08;
  letter-spacing: -0.015em;
  color: var(--sg-mist);
  text-wrap: balance;
}

.page-about .about-hero__plate {
  display: inline-block;
  margin-bottom: 12px;
  padding: 6px 16px 7px;
  font-family: var(--sg-mono);
  font-size: clamp(0.8rem, 2.4vw, 1rem);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--sg-night);
  background: linear-gradient(96deg, var(--sg-cyan), #9df4ff 55%, var(--sg-mint));
  transform: skewX(-8deg);
}

.page-about .about-hero__lede {
  max-width: 62ch;
  margin: 0 0 24px;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--sg-blueprint);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 30px;
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin: 0;
  padding: 16px 0 0;
  list-style: none;
  border-top: 1px solid var(--sg-line);
}

.page-about .about-hero__stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding-left: 12px;
  border-left: 2px solid var(--about-violet-soft);
}

.page-about .about-hero__stat:nth-child(2) {
  border-left-color: var(--about-cyan-soft);
}

.page-about .about-hero__stat:nth-child(3) {
  border-left-color: rgba(255, 107, 26, 0.42);
}

.page-about .about-hero__stat-num {
  font-family: var(--sg-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(1.5rem, 5.2vw, 2.2rem);
  font-weight: 500;
  line-height: 1;
  color: var(--sg-mist);
}

.page-about .about-hero__stat-num em {
  font-style: normal;
  font-size: 0.52em;
  color: var(--sg-cyan);
  margin-left: 2px;
}

.page-about .about-hero__stat-label {
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--sg-blueprint);
}

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

/* ---------- 发展轨迹 ---------- */
.page-about .about-trail__head {
  max-width: 62ch;
  margin-bottom: 30px;
}

.page-about .about-trail__title {
  margin: 12px 0 14px;
  font-size: clamp(1.5rem, 4.4vw, 2.4rem);
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--sg-mist);
}

.page-about .about-trail__lede {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--sg-blueprint);
}

.page-about .about-trail__body {
  display: grid;
  gap: 22px;
}

.page-about .about-years {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 2px 0 10px;
  scrollbar-width: thin;
}

.page-about .about-years__item {
  flex: 0 0 auto;
  display: flex;
  align-items: baseline;
  gap: 6px;
  padding: 8px 14px;
  border: 1px solid var(--sg-line);
  border-left: 2px solid var(--sg-violet);
  background: rgba(14, 11, 26, 0.72);
  text-decoration: none;
  transition: border-color 200ms var(--sg-ease), background 200ms var(--sg-ease);
}

.page-about .about-years__num {
  font-family: var(--sg-mono);
  font-variant-numeric: tabular-nums;
  font-size: 0.95rem;
  color: var(--sg-mist);
}

.page-about .about-years__label {
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  color: var(--sg-blueprint);
}

.page-about .about-years__item:hover,
.page-about .about-years__item:focus-visible {
  border-color: var(--sg-cyan);
  border-left-color: var(--sg-cyan);
  background: rgba(0, 229, 255, 0.07);
}

.page-about .about-stages {
  display: grid;
  gap: 26px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-stage {
  display: grid;
  gap: 12px;
}

.page-about .about-stage__year {
  font-family: var(--sg-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 300;
  font-size: clamp(2.3rem, 10vw, 3.6rem);
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--sg-blueprint);
}

@supports (-webkit-text-stroke: 1px #000) {
  .page-about .about-stage__year {
    color: transparent;
    -webkit-text-stroke: 1px rgba(169, 155, 199, 0.72);
  }
}

.page-about .about-stage__plate {
  padding: 20px 20px 22px;
  background: var(--sg-paper);
  color: var(--sg-ink);
  border-left: 4px solid var(--sg-violet);
  box-shadow: var(--sg-shadow);
}

.page-about .about-stage__plate--dark {
  background: linear-gradient(158deg, var(--sg-deep), #140b2a 62%, var(--sg-deep));
  color: var(--sg-mist);
  border: 1px solid var(--sg-line);
  border-left: 4px solid var(--sg-cyan);
}

.page-about .about-stage__index {
  margin: 0 0 8px;
  font-family: var(--sg-mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(37, 26, 20, 0.62);
}

.page-about .about-stage__plate--dark .about-stage__index {
  color: var(--sg-cyan);
}

.page-about .about-stage__plate h3 {
  margin: 0 0 10px;
  font-size: 1.1rem;
  font-weight: 800;
  line-height: 1.35;
  color: inherit;
}

.page-about .about-stage__plate p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.85;
  color: rgba(37, 26, 20, 0.82);
}

.page-about .about-stage__plate--dark p {
  color: var(--sg-blueprint);
}

.page-about .about-stage__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-stage__figure {
  margin: 18px 0 0;
}

/* ---------- 日常运营 ---------- */
.page-about .about-ops__head {
  max-width: 62ch;
  margin-bottom: 26px;
}

.page-about .about-ops__title {
  margin: 12px 0 14px;
  font-size: clamp(1.5rem, 4.4vw, 2.4rem);
  font-weight: 900;
  line-height: 1.22;
  color: var(--sg-mist);
}

.page-about .about-ops__lede {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--sg-blueprint);
}

.page-about .about-ops__list {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--sg-line);
}

.page-about .about-ops__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 4px 16px;
  padding: 20px 0;
  border-bottom: 1px solid var(--sg-line);
}

.page-about .about-ops__num {
  grid-row: span 2;
  font-family: var(--sg-mono);
  font-variant-numeric: tabular-nums;
  font-size: 1.5rem;
  font-weight: 300;
  line-height: 1.1;
  color: var(--sg-cyan);
}

.page-about .about-ops__item h3 {
  margin: 0;
  font-size: 1.02rem;
  font-weight: 700;
  line-height: 1.5;
  color: var(--sg-mist);
}

.page-about .about-ops__item p {
  grid-column: 2;
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--sg-blueprint);
}

/* ---------- 团队 ---------- */
.page-about .about-team__grid {
  display: grid;
  gap: 26px;
}

.page-about .about-team__title {
  margin: 12px 0 14px;
  font-size: clamp(1.5rem, 4.4vw, 2.4rem);
  font-weight: 900;
  line-height: 1.22;
  color: var(--sg-mist);
}

.page-about .about-team__lede {
  margin: 0 0 22px;
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--sg-blueprint);
}

.page-about .about-team__roles {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-team__role {
  display: grid;
  grid-template-columns: 58px minmax(0, 1fr);
  gap: 2px 14px;
  padding: 12px 14px;
  background: rgba(14, 11, 26, 0.78);
  border: 1px solid var(--sg-line);
  border-left: 2px solid var(--sg-violet);
}

.page-about .about-team__n {
  grid-row: span 2;
  font-family: var(--sg-mono);
  font-variant-numeric: tabular-nums;
  font-size: 1.6rem;
  font-weight: 500;
  line-height: 1;
  color: var(--sg-cyan);
  align-self: center;
}

.page-about .about-team__role-name {
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--sg-mist);
}

.page-about .about-team__role-desc {
  font-size: 0.82rem;
  line-height: 1.7;
  color: var(--sg-blueprint);
}

.page-about .about-team__media {
  margin: 0;
  aspect-ratio: 4 / 5;
}

.page-about .about-team__media .sg-media__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ---------- 合作生态 ---------- */
.page-about .about-partners__grid {
  display: grid;
  gap: 24px;
}

.page-about .about-partners__title {
  margin: 12px 0 14px;
  font-size: clamp(1.5rem, 4.4vw, 2.4rem);
  font-weight: 900;
  line-height: 1.22;
  color: var(--sg-mist);
}

.page-about .about-partners__lede {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--sg-blueprint);
}

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

.page-about .about-partners__item {
  padding: 16px 18px 18px;
  background: linear-gradient(152deg, rgba(14, 11, 26, 0.95), rgba(20, 11, 42, 0.7));
  border: 1px solid var(--sg-line);
}

.page-about .about-partners__n {
  display: block;
  font-family: var(--sg-mono);
  font-variant-numeric: tabular-nums;
  font-size: 2rem;
  font-weight: 500;
  line-height: 1;
  color: var(--sg-mint);
}

.page-about .about-partners__item h3 {
  margin: 6px 0 8px;
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--sg-mist);
}

.page-about .about-partners__item p {
  margin: 0;
  font-size: 0.86rem;
  line-height: 1.8;
  color: var(--sg-blueprint);
}

.page-about .about-partners__honor {
  position: relative;
  overflow: hidden;
  padding: 20px;
  background: var(--sg-paper);
  color: var(--sg-ink);
  border-left: 4px solid var(--sg-orange);
}

.page-about .about-partners__honor-label {
  margin: 0 0 8px;
  font-family: var(--sg-mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(37, 26, 20, 0.6);
}

.page-about .about-partners__honor-text {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.85;
  color: rgba(37, 26, 20, 0.86);
}

.page-about .about-partners__stamp {
  display: inline-block;
  margin-top: 14px;
  padding: 4px 10px;
  font-family: var(--sg-mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  color: var(--sg-paper);
  background: var(--sg-ink);
}

/* ---------- 收束 ---------- */
.page-about .about-close__panel {
  position: relative;
  overflow: hidden;
  padding: 28px 22px 30px;
  background:
    radial-gradient(120% 140% at 100% 0%, rgba(0, 229, 255, 0.16), transparent 58%),
    linear-gradient(140deg, rgba(108, 43, 255, 0.26), rgba(14, 11, 26, 0.94) 60%);
  border: 1px solid var(--sg-line-cyan);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 26px), calc(100% - 26px) 100%, 0 100%);
}

.page-about .about-close__title {
  margin: 12px 0 14px;
  font-size: clamp(1.4rem, 4.2vw, 2.2rem);
  font-weight: 900;
  line-height: 1.24;
  color: var(--sg-mist);
}

.page-about .about-close__text {
  max-width: 62ch;
  margin: 0 0 22px;
  font-size: 0.95rem;
  line-height: 1.85;
  color: var(--sg-blueprint);
}

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

.page-about .about-close__note {
  margin: 18px 0 0;
  font-family: var(--sg-mono);
  font-size: 0.74rem;
  letter-spacing: 0.04em;
  color: rgba(169, 155, 199, 0.85);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-hero__stats {
    max-width: 560px;
  }

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

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

@media (min-width: 900px) {
  .page-about .about-hero {
    padding-top: 34px;
    padding-bottom: 68px;
  }

  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, 0.94fr);
    align-items: end;
    gap: 52px;
  }

  .page-about .about-hero__title {
    margin-top: 16px;
  }

  .page-about .about-trail__head,
  .page-about .about-ops__head {
    max-width: 56ch;
  }

  .page-about .about-trail__body {
    grid-template-columns: 190px minmax(0, 1fr);
    gap: 56px;
    align-items: start;
  }

  .page-about .about-years {
    position: sticky;
    top: calc(var(--sg-header-h) + 28px);
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding: 0;
    border-left: 1px solid var(--sg-line);
  }

  .page-about .about-years__item {
    border: 1px solid transparent;
    border-left: 2px solid transparent;
    background: transparent;
    padding: 9px 12px;
  }

  .page-about .about-years__item:hover,
  .page-about .about-years__item:focus-visible {
    border-color: transparent;
    border-left-color: var(--sg-cyan);
    background: rgba(0, 229, 255, 0.06);
  }

  .page-about .about-stage {
    position: relative;
    grid-template-columns: 150px minmax(0, 1fr);
    gap: 34px;
    align-items: start;
  }

  .page-about .about-stage::before {
    content: "";
    position: absolute;
    left: 88px;
    top: 22px;
    bottom: -26px;
    width: 1px;
    background: linear-gradient(180deg, rgba(108, 43, 255, 0.62), rgba(0, 229, 255, 0.22));
  }

  .page-about .about-stage:last-child::before {
    display: none;
  }

  .page-about .about-stage__year {
    position: relative;
    z-index: 1;
    background: linear-gradient(180deg, var(--sg-night) 62%, transparent);
    padding-bottom: 8px;
  }

  .page-about .about-stage__plate {
    padding: 24px 26px 26px;
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: 48px;
    align-items: start;
  }

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

  .page-about .about-partners__grid {
    grid-template-columns: minmax(0, 0.86fr) minmax(0, 1.14fr);
    grid-template-areas:
      "head list"
      "honor list";
    column-gap: 44px;
    row-gap: 22px;
    align-items: start;
  }

  .page-about .about-partners__head {
    grid-area: head;
  }

  .page-about .about-partners__list {
    grid-area: list;
    align-self: stretch;
  }

  .page-about .about-partners__honor {
    grid-area: honor;
  }

  .page-about .about-close__panel {
    padding: 44px 48px 46px;
  }
}

@media (min-width: 1200px) {
  .page-about .about-trail__body {
    grid-template-columns: 210px minmax(0, 1fr);
    gap: 72px;
  }

  .page-about .about-stage {
    grid-template-columns: 168px minmax(0, 1fr);
    gap: 42px;
  }

  .page-about .about-stage::before {
    left: 104px;
  }

  .page-about .about-team__grid {
    gap: 60px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-years__item {
    transition: none;
  }
}
<<<END>>>