.page-about {
  --about-rule: 1px solid var(--hairline);
  --about-block-space: 84px;
  background-color: var(--ink-green);
  color: var(--body-light);
  overflow-x: hidden;
}

.page-about .about-sep {
  margin: 0 8px;
  color: var(--index-grey);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  padding: calc(var(--header-h) + 64px) 0 72px;
  border-bottom: var(--about-rule);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(130% 90% at 86% -12%, rgba(53, 224, 161, 0.12), transparent 60%),
    linear-gradient(180deg, rgba(15, 58, 46, 0.6), transparent 72%);
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 48px;
  background: var(--ink-green);
  transform: skewY(calc(var(--slant) * -0.5));
  transform-origin: left bottom;
  pointer-events: none;
}

.page-about .about-hero-inner {
  position: relative;
}

.page-about .about-hero .breadcrumb {
  font-size: var(--step-12);
  letter-spacing: 0.12em;
  color: var(--index-grey);
  margin-bottom: 48px;
}

.page-about .about-hero .breadcrumb a {
  color: var(--index-grey);
  text-decoration: none;
}

.page-about .about-hero .breadcrumb a:hover,
.page-about .about-hero .breadcrumb a:focus-visible {
  color: var(--neon);
}

.page-about .about-hero-grid {
  display: grid;
  gap: 44px;
}

.page-about .about-h1 {
  margin: 18px 0 24px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(40px, 8.4vw, 92px);
  line-height: 0.98;
  letter-spacing: -0.02em;
  color: var(--paper-bright);
}

.page-about .about-lede {
  max-width: 34em;
  margin: 0;
  font-size: var(--step-17);
  line-height: 1.85;
  color: var(--body-light);
}

.page-about .about-statline {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--hairline);
  border: var(--about-rule);
}

.page-about .about-stat {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 18px 16px 20px;
  background: var(--ink-green);
}

.page-about .about-num {
  font-family: var(--font-data);
  font-size: clamp(26px, 3.6vw, 40px);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--paper-bright);
}

.page-about .about-num i {
  font-style: normal;
  margin-left: 5px;
  font-size: 0.4em;
  color: var(--index-grey);
}

/* ---------- 通用双栏 ---------- */

.page-about .about-block {
  padding: var(--about-block-space) 0;
  border-bottom: var(--about-rule);
}

.page-about .about-block--alt {
  background: var(--charcoal);
}

.page-about .about-cols {
  display: grid;
  gap: 44px;
}

.page-about .about-block-head {
  margin-bottom: 36px;
}

.page-about .about-block-head h2 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(28px, 4.6vw, 48px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--paper-bright);
  max-width: 24em;
}

.page-about .about-block-sub {
  margin: 18px 0 0;
  max-width: 34em;
  font-size: var(--step-17);
  line-height: 1.85;
  color: var(--index-grey);
}

.page-about .about-col-main > p {
  margin: 0 0 22px;
  font-size: var(--step-17);
  line-height: 1.85;
  color: var(--body-light);
}

.page-about .about-col-main > p:last-child {
  margin-bottom: 0;
}

/* ---------- 自述三点 ---------- */

.page-about .about-point + .about-point {
  margin-top: 40px;
  padding-top: 40px;
  border-top: var(--about-rule);
}

.page-about .about-point h3 {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0 0 14px;
  font-size: var(--step-24);
  font-weight: 600;
  color: var(--paper-bright);
}

.page-about .about-point p {
  margin: 0;
  font-size: var(--step-17);
  line-height: 1.85;
  color: var(--body-light);
}

.page-about .about-point-no {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  border: 1px solid rgba(53, 224, 161, 0.4);
  font-family: var(--font-data);
  font-size: var(--step-12);
  color: var(--neon);
  letter-spacing: 0;
}

/* ---------- 图片 ---------- */

.page-about .about-figure {
  margin: 0 0 32px;
}

.page-about .about-figure-media {
  position: relative;
  overflow: hidden;
}

.page-about .about-figure-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(13, 26, 21, 0.12);
  pointer-events: none;
}

.page-about .about-figure-media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(0.7) contrast(1.02);
}

.page-about .about-figure figcaption {
  margin-top: 12px;
  color: var(--index-grey);
  border-left: 1px solid var(--hairline);
  padding-left: 10px;
}

.page-about .about-col-main .about-figure--wide {
  margin-top: 36px;
  margin-bottom: 0;
}

/* ---------- 索引 ---------- */

.page-about .about-index {
  border-top: 1px solid rgba(53, 224, 161, 0.4);
  padding-top: 18px;
}

.page-about .about-index ol {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-about .about-index a {
  display: block;
  padding: 9px 10px;
  font-size: var(--step-14);
  color: var(--index-grey);
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: color 0.24s var(--ease), border-color 0.24s var(--ease), background-color 0.24s var(--ease);
}

.page-about .about-index a:hover,
.page-about .about-index a:focus-visible {
  color: var(--paper-bright);
  border-left-color: var(--neon);
  background: rgba(53, 224, 161, 0.06);
}

.page-about .about-index a[aria-current="true"] {
  color: var(--neon);
  border-left-color: var(--neon);
}

/* ---------- 注释块 ---------- */

.page-about .about-note {
  padding: 20px 18px;
  background: var(--paper);
  border: 1px solid var(--deep-teal);
  color: var(--ink-green);
}

.page-about .about-note + .about-note {
  margin-top: 20px;
}

.page-about .about-note .index-label {
  color: var(--deep-teal);
  margin-bottom: 10px;
}

.page-about .about-note p {
  margin: 0;
  font-size: var(--step-14);
  line-height: 1.8;
  color: var(--ink-green);
}

.page-about .about-note--warn {
  border-left: 3px solid var(--correct-red);
}

.page-about .about-note--warn .index-label {
  color: var(--correct-red);
}

.page-about .about-node-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-about .about-node-list li {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(15, 58, 46, 0.25);
  font-size: var(--step-14);
}

.page-about .about-node-list li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-about .about-node-list em {
  font-style: normal;
  font-family: var(--font-data);
  font-size: var(--step-12);
  color: var(--deep-teal);
  white-space: nowrap;
}

/* ---------- 五赛季时间线 ---------- */

.page-about .about-timeline-band {
  padding: var(--about-block-space) 0;
  background: var(--charcoal);
  border-bottom: var(--about-rule);
}

.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 36px 24px;
}

.page-about .about-tl-item {
  position: relative;
  padding-top: 34px;
  border-top: 1px solid var(--hairline);
}

.page-about .about-tl-node {
  position: absolute;
  top: -4px;
  left: 0;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--neon);
  box-shadow: 0 0 0 4px rgba(53, 224, 161, 0.14);
  transition: box-shadow 0.28s var(--ease);
}

.page-about .about-tl-item:first-child .about-tl-node,
.page-about .about-tl-item:last-child .about-tl-node {
  box-shadow: 0 0 0 6px rgba(53, 224, 161, 0.2);
}

.page-about .about-tl-year {
  margin: 0 0 8px;
  font-family: var(--font-data);
  font-size: var(--step-24);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--neon);
}

.page-about .about-tl-item h3 {
  margin: 0 0 8px;
  font-size: var(--step-17);
  font-weight: 600;
  color: var(--paper-bright);
}

.page-about .about-tl-desc {
  margin: 0;
  font-size: var(--step-14);
  line-height: 1.75;
  color: var(--index-grey);
  transition: color 0.3s var(--ease);
}

.page-about .about-tl-item:hover .about-tl-desc,
.page-about .about-tl-item:focus-within .about-tl-desc {
  color: var(--body-light);
}

.page-about .about-tl-item:hover .about-tl-node {
  box-shadow: 0 0 0 7px rgba(53, 224, 161, 0.24);
}

.page-about .about-timeline-figure {
  margin: 56px 0 0;
}

.page-about .about-timeline-figure figcaption {
  margin-top: 12px;
  color: var(--index-grey);
}

/* ---------- 四步流程 ---------- */

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

.page-about .about-step {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 18px;
  padding: 26px 0;
  border-top: var(--about-rule);
}

.page-about .about-step:last-child {
  border-bottom: var(--about-rule);
}

.page-about .about-step-no {
  font-family: var(--font-data);
  font-size: var(--step-14);
  letter-spacing: 0.02em;
  color: var(--neon);
  padding-top: 3px;
}

.page-about .about-step-body h3 {
  margin: 0 0 8px;
  font-size: var(--step-24);
  font-weight: 600;
  color: var(--paper-bright);
}

.page-about .about-step-body p {
  margin: 0;
  font-size: var(--step-17);
  line-height: 1.85;
  color: var(--body-light);
}

/* ---------- 分工表 ---------- */

.page-about .about-table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-roster {
  width: 100%;
  min-width: 260px;
  border-collapse: collapse;
  font-size: var(--step-14);
}

.page-about .about-roster caption {
  text-align: left;
  padding-bottom: 14px;
  color: var(--index-grey);
}

.page-about .about-roster th,
.page-about .about-roster td {
  text-align: left;
  padding: 12px 10px 12px 0;
  border-bottom: var(--about-rule);
  vertical-align: top;
  line-height: 1.6;
}

.page-about .about-roster thead th {
  font-size: var(--step-12);
  font-weight: 500;
  letter-spacing: 0.14em;
  color: var(--index-grey);
}

.page-about .about-roster tbody th {
  font-weight: 500;
  color: var(--body-light);
  white-space: nowrap;
}

.page-about .about-roster tbody td {
  color: var(--index-grey);
}

.page-about .about-roster tbody td:nth-child(2) {
  font-family: var(--font-data);
  color: var(--neon);
  white-space: nowrap;
}

/* ---------- 协作生态 ---------- */

.page-about .about-partners {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--hairline);
  border: var(--about-rule);
}

.page-about .about-partner {
  background: var(--ink-green);
  padding: 28px 22px 30px;
}

.page-about .about-partner-num {
  margin: 0 0 14px;
  font-family: var(--font-data);
  font-size: clamp(40px, 6vw, 72px);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--neon);
}

.page-about .about-partner h3 {
  margin: 0 0 10px;
  font-size: var(--step-24);
  font-weight: 600;
  color: var(--paper-bright);
}

.page-about .about-partner p {
  margin: 0;
  font-size: var(--step-14);
  line-height: 1.8;
  color: var(--body-light);
}

/* ---------- 更正动作 ---------- */

.page-about .about-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 32px;
}

/* ---------- 响应式 ---------- */

@media (min-width: 640px) {
  .page-about .about-statline {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

@media (min-width: 720px) {
  .page-about .about-timeline {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 960px) {
  .page-about {
    --about-block-space: 112px;
  }

  .page-about .about-hero {
    padding-top: calc(var(--header-h) + 96px);
    padding-bottom: 96px;
  }

  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    align-items: end;
    gap: 72px;
  }

  .page-about .about-cols {
    grid-template-columns: minmax(0, 1fr) minmax(240px, 320px);
    gap: 72px;
  }

  .page-about .about-index {
    position: sticky;
    top: calc(var(--header-h-solid) + 28px);
  }
}

@media (min-width: 1080px) {
  .page-about .about-timeline {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 0 24px;
    padding-left: 0;
    padding-right: 0;
  }

  .page-about .about-tl-item:first-child {
    padding-left: 0;
    margin-left: 0;
  }

  .page-about .about-tl-item:last-child {
    padding-right: 24px;
    margin-right: 24px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-index a,
  .page-about .about-tl-desc,
  .page-about .about-tl-node {
    transition: none;
  }
}
<<<END>>>