.page-about {
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-body);
  padding-bottom: 88px;
}

.page-about a {
  color: var(--cyan);
  text-decoration: none;
  transition: color var(--t) var(--ease);
}

.page-about a:hover {
  color: var(--cyan-soft);
}

.page-about :focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-about img {
  display: block;
  max-width: 100%;
  height: auto;
}

/* ---------- 面包屑 ---------- */
.about-crumbs {
  padding-top: 18px;
}

.about-crumbs__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--mist);
}

.about-crumbs__list a {
  color: var(--mist);
}

.about-crumbs__item[aria-current="page"] {
  color: var(--steel);
}

.about-crumbs__sep {
  color: var(--line);
}

/* ---------- 首屏 ---------- */
.about-hero {
  position: relative;
  overflow: hidden;
  padding: 24px 0 48px;
}

.about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(58% 52% at 84% 0%, rgba(31, 224, 207, 0.16), transparent 72%),
    linear-gradient(180deg, rgba(15, 21, 29, 0.9), transparent 68%);
}

.about-hero__grid {
  position: relative;
  display: grid;
  gap: 28px;
  align-items: start;
}

.about-kicker {
  display: inline-block;
  margin: 0;
  padding: 6px 12px;
  font-family: var(--font-num);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--cyan);
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(31, 224, 207, 0.12), rgba(31, 224, 207, 0));
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 6px), calc(100% - 6px) 100%, 0 100%);
}

.about-hero__title {
  margin: 18px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-stretch: condensed;
  font-size: clamp(32px, 7.2vw, 68px);
  line-height: 1.04;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.about-hero__title span {
  display: block;
  color: var(--cyan);
}

.about-hero__lead {
  max-width: 38ch;
  margin: 18px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--steel);
}

.about-hero__acts {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.about-figure {
  position: relative;
  margin: 0;
}

.about-figure img {
  width: 100%;
  object-fit: cover;
  filter: saturate(0.86) contrast(1.06);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%);
}

.about-figure::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  border: 1px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%);
}

.about-figure__cap {
  margin-top: 10px;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--mist);
}

.about-hero__figure img {
  aspect-ratio: 3 / 2;
}

/* ---------- 主体分栏 ---------- */
.about-body {
  display: grid;
  gap: 24px;
  padding-top: 8px;
}

/* ---------- 年份轴 ---------- */
.about-rail__head {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--mist);
}

.about-rail__eyebrow {
  color: var(--cyan);
  animation: about-blink 2.4s ease-in-out infinite;
}

@keyframes about-blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.25; }
}

.about-rail__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.about-rail__item {
  flex: 0 0 auto;
}

.about-rail__link {
  display: grid;
  gap: 2px;
  min-width: 148px;
  padding: 10px 12px;
  border-top: 2px solid var(--line);
  background: rgba(15, 21, 29, 0.7);
  color: var(--steel);
  transition: border-color var(--t) var(--ease), color var(--t) var(--ease), background var(--t) var(--ease);
}

.about-rail__year {
  font-family: var(--font-num);
  font-size: 15px;
  font-weight: 700;
  color: var(--mist);
  transition: color var(--t) var(--ease);
}

.about-rail__label {
  font-size: 13px;
  letter-spacing: 0.04em;
}

.about-rail__note {
  display: none;
}

.about-rail__link:hover,
.about-rail__link:focus-visible {
  border-top-color: var(--cyan);
  background: rgba(31, 224, 207, 0.08);
  color: var(--cyan-soft);
}

.about-rail__link:hover .about-rail__year,
.about-rail__link:focus-visible .about-rail__year {
  color: var(--cyan);
}

/* ---------- 章节通用 ---------- */
.about-sec {
  position: relative;
  padding: 36px 0 4px;
}

.about-sec + .about-sec {
  margin-top: 28px;
}

.about-sec::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  transform: skewY(-1.4deg);
  transform-origin: left center;
  background: linear-gradient(90deg, var(--cyan), rgba(31, 224, 207, 0.06) 64%, transparent);
}

.about-sec__head {
  display: grid;
  gap: 12px;
  margin-bottom: 24px;
}

.about-tag {
  justify-self: start;
  margin: 0;
  padding: 5px 10px;
  font-family: var(--font-num);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--ink);
  background: var(--cyan);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 6px), calc(100% - 6px) 100%, 0 100%);
}

.about-sec__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-stretch: condensed;
  font-size: clamp(24px, 5vw, 40px);
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.about-sec__lead {
  max-width: 38ch;
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist);
}

.about-sec__after {
  max-width: 38ch;
  margin: 16px 0 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 图文分栏 ---------- */
.about-split {
  display: grid;
  gap: 22px;
}

.about-text {
  max-width: 38ch;
}

.about-text--wide {
  max-width: 60ch;
  margin-top: 24px;
}

.about-text p {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--steel);
}

.about-text p:last-child {
  margin-bottom: 0;
}

/* ---------- 工序 ---------- */
.about-flow {
  display: grid;
  gap: 10px;
}

.about-step {
  position: relative;
  padding: 16px 16px 14px;
  background: var(--ink-2);
  border: 1px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%);
  transition: border-color var(--t) var(--ease), transform var(--t) var(--ease), background var(--t) var(--ease);
}

.about-step:hover,
.about-step:focus-visible {
  border-color: var(--cyan-deep);
  transform: translateY(-4px);
  background: linear-gradient(180deg, rgba(31, 224, 207, 0.12), var(--ink-2) 72%);
}

.about-step__num {
  display: block;
  font-family: var(--font-num);
  font-size: 24px;
  font-weight: 700;
  line-height: 1;
  color: var(--flame);
}

.about-step__title {
  margin: 8px 0 6px;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--paper);
}

.about-step__desc {
  margin: 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--steel);
}

.about-step__meta {
  margin: 10px 0 0;
  padding-top: 8px;
  border-top: 1px dashed var(--line);
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--mist);
}

.about-step__more {
  max-height: 0;
  margin: 0;
  overflow: hidden;
  opacity: 0;
  font-size: 12px;
  line-height: 1.7;
  color: var(--cyan-soft);
  transition: max-height var(--t) var(--ease), opacity var(--t) var(--ease), margin var(--t) var(--ease);
}

.about-step:hover .about-step__more,
.about-step:focus-visible .about-step__more {
  max-height: 96px;
  margin-top: 8px;
  opacity: 1;
}

.about-figure--wide {
  margin-top: 24px;
}

.about-figure--wide img {
  aspect-ratio: 10 / 7;
}

/* ---------- 版本 ---------- */
.about-versions {
  display: grid;
  gap: 12px;
}

.about-version {
  padding: 18px;
  background: var(--ink-2);
  border-top: 2px solid var(--line);
}

.about-version--now {
  border-top-color: var(--flame);
  background: linear-gradient(180deg, rgba(255, 90, 43, 0.12), var(--ink-2) 62%);
}

.about-version__era {
  margin: 0;
  font-family: var(--font-num);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--cyan);
}

.about-version__title {
  margin: 8px 0 8px;
  font-size: 17px;
  font-weight: 700;
  color: var(--paper);
}

.about-version__desc {
  margin: 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--steel);
}

.about-tablewrap {
  margin-top: 22px;
  overflow-x: auto;
  border: 1px solid var(--line);
}

.about-table {
  width: 100%;
  min-width: 400px;
  border-collapse: collapse;
  font-size: 13px;
}

.about-table__cap {
  padding: 10px 12px;
  text-align: left;
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--mist);
  background: var(--ink-3);
  border-bottom: 1px solid var(--line);
}

.about-table th,
.about-table td {
  padding: 10px 12px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--line);
  color: var(--steel);
  line-height: 1.65;
}

.about-table thead th {
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--cyan);
  background: var(--ink-2);
}

.about-table tbody th {
  color: var(--paper);
  font-weight: 500;
  white-space: nowrap;
}

.about-table tbody tr:nth-child(even) {
  background: rgba(15, 21, 29, 0.62);
}

.about-table tbody tr:hover {
  background: rgba(31, 224, 207, 0.08);
}

/* ---------- 团队 ---------- */
.about-team {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}

.about-team__row {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.about-team__num {
  font-family: var(--font-num);
  font-size: 28px;
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.about-team__body {
  min-width: 0;
}

.about-team__name {
  margin: 0;
  font-size: 15px;
  font-weight: 700;
  color: var(--paper);
}

.about-team__desc {
  margin: 4px 0 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--steel);
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: 26px;
  background: var(--line);
  border: 1px solid var(--line);
}

.about-stats__cell {
  padding: 14px;
  background: var(--ink-2);
}

.about-stats__num {
  margin: 0;
  font-family: var(--font-num);
  font-size: clamp(22px, 5.2vw, 32px);
  font-weight: 700;
  line-height: 1.1;
  color: var(--paper);
  font-variant-numeric: tabular-nums;
}

.about-stats__num em {
  font-style: normal;
  font-size: 0.55em;
  color: var(--flame);
  margin-left: 2px;
}

.about-stats__label {
  margin: 6px 0 0;
  font-size: 12px;
  line-height: 1.6;
  color: var(--mist);
}

/* ---------- 伙伴 ---------- */
.about-partners {
  display: grid;
  gap: 12px;
}

.about-partner {
  padding: 16px;
  background: var(--ink-3);
  border: 1px solid var(--line);
  border-left: 3px solid var(--cyan-deep);
}

.about-partner__num {
  margin: 0;
  font-family: var(--font-num);
  font-size: 30px;
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
}

.about-partner__num em {
  font-style: normal;
  font-size: 0.5em;
  color: var(--mist);
  margin-left: 3px;
}

.about-partner__title {
  margin: 10px 0 6px;
  font-size: 15px;
  font-weight: 700;
  color: var(--paper);
}

.about-partner__desc {
  margin: 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--steel);
}

/* ---------- 收尾 ---------- */
.about-cta {
  display: grid;
  gap: 16px;
  margin-top: 56px;
  padding: 24px 20px;
  border: 1px solid var(--line);
  background:
    linear-gradient(120deg, rgba(31, 224, 207, 0.16), rgba(255, 90, 43, 0.1) 68%, rgba(8, 11, 16, 0) 100%),
    var(--ink-2);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 16px), calc(100% - 16px) 100%, 0 100%);
}

.about-cta__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-stretch: condensed;
  font-size: clamp(22px, 4.6vw, 30px);
  line-height: 1.15;
  color: var(--paper);
}

.about-cta__desc {
  margin: 8px 0 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--steel);
}

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

/* ---------- 响应式 ---------- */
@media (min-width: 600px) {
  .about-flow {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

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

@media (min-width: 720px) {
  .about-split {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 28px;
    align-items: start;
  }

  .about-hero {
    padding-bottom: 56px;
  }

  .about-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    padding: 30px 28px;
  }

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

  .about-table {
    min-width: 520px;
  }
}

@media (min-width: 960px) {
  .about-hero__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: 44px;
  }

  .about-hero__figure img {
    aspect-ratio: 4 / 3;
    max-height: 380px;
  }

  .about-body {
    grid-template-columns: 216px minmax(0, 1fr);
    gap: 56px;
    padding-top: 24px;
  }

  .about-rail {
    position: sticky;
    top: 112px;
    align-self: start;
  }

  .about-rail__list {
    display: grid;
    gap: 6px;
    overflow: visible;
    padding-bottom: 0;
  }

  .about-rail__item {
    flex: none;
  }

  .about-rail__link {
    min-width: 0;
    border-top: 0;
    border-left: 2px solid var(--line);
    background: transparent;
    padding: 10px 12px 10px 14px;
  }

  .about-rail__link:hover,
  .about-rail__link:focus-visible {
    border-top-color: transparent;
    border-left-color: var(--cyan);
    background: rgba(31, 224, 207, 0.08);
  }

  .about-rail__note {
    display: block;
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    font-size: 11px;
    line-height: 1.6;
    color: var(--mist);
    transition: max-height var(--t) var(--ease), opacity var(--t) var(--ease), margin var(--t) var(--ease);
  }

  .about-rail__link:hover .about-rail__note,
  .about-rail__link:focus-visible .about-rail__note {
    max-height: 56px;
    margin-top: 6px;
    opacity: 1;
  }

  .about-sec {
    padding-top: 44px;
  }

  .about-sec + .about-sec {
    margin-top: 40px;
  }
}

@media (min-width: 1180px) {
  .about-flow {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about * {
    transition-duration: 0.01ms !important;
    animation: none !important;
  }

  .about-step:hover,
  .about-step:focus-visible {
    transform: none;
  }
}
<<<END>>>