.page-about {
  --about-rail: 88px;
  --about-hair: rgba(198, 208, 214, 0.75);
  --about-hair-dark: rgba(198, 208, 214, 0.22);
  background: var(--c-canvas);
  color: var(--c-ink);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  background: var(--c-ink);
  color: var(--c-canvas);
  padding: 56px 0 60px;
}

.page-about .about-hero__deco {
  position: absolute;
  inset: 0;
  pointer-events: none;
  display: none;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 34px;
}

.page-about .about-crumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: rgba(247, 242, 230, 0.62);
}

.page-about .about-crumb a {
  color: rgba(247, 242, 230, 0.82);
  text-decoration: none;
  border-bottom: 1px solid rgba(22, 198, 208, 0.55);
  padding-bottom: 1px;
}

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

.page-about .about-crumb [aria-current="page"] {
  color: var(--c-canvas);
}

.page-about .about-hero__eyebrow {
  margin: 20px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--c-cyan);
}

.page-about .about-hero__title {
  margin: 14px 0 0;
  font-size: clamp(32px, 6.4vw, 60px);
  line-height: 1.1;
  font-weight: 900;
  letter-spacing: -0.02em;
  max-width: 15em;
}

.page-about .about-hero__lead {
  margin: 20px 0 0;
  font-size: 16px;
  line-height: 1.8;
  color: rgba(247, 242, 230, 0.86);
  max-width: 34em;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.page-about .about-hero .btn--ghost {
  border-color: rgba(247, 242, 230, 0.45);
  color: var(--c-canvas);
}

.page-about .about-hero .btn--ghost:hover {
  border-color: var(--c-cyan);
  color: var(--c-cyan);
}

/* 首屏概览面板 */
.page-about .about-facts {
  background: var(--c-paper);
  color: var(--c-ink);
  border-top: 3px solid var(--c-orange);
  align-self: start;
}

.page-about .about-facts__cap {
  margin: 0;
  padding: 14px 18px 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--c-clay);
  border-bottom: 1px solid var(--c-grid);
}

.page-about .about-facts__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-facts__row {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 15px 18px;
  border-bottom: 1px solid var(--c-grid);
}

.page-about .about-facts__row:last-child {
  border-bottom: 0;
}

.page-about .about-facts__v {
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--c-orange-deep);
  min-width: 70px;
}

.page-about .about-facts__k {
  font-size: 13.5px;
  line-height: 1.5;
  color: var(--c-slate);
}

@media (min-width: 900px) {
  .page-about .about-hero {
    padding: 84px 0 92px;
  }

  .page-about .about-hero__deco {
    display: block;
  }

  .page-about .about-hero__deco::before {
    content: "";
    position: absolute;
    top: -18%;
    bottom: -18%;
    left: 52%;
    right: -14%;
    background: linear-gradient(152deg, var(--c-orange) 0%, var(--c-orange-deep) 100%);
    transform: skewX(-11deg);
    opacity: 0.95;
  }

  .page-about .about-hero__deco::after {
    content: "";
    position: absolute;
    top: -18%;
    bottom: -18%;
    left: 50.4%;
    width: 2px;
    background: var(--c-cyan);
    transform: skewX(-11deg);
    opacity: 0.9;
  }

  .page-about .about-hero__inner {
    grid-template-columns: 1.05fr 0.95fr;
    gap: 52px;
    align-items: center;
  }

  .page-about .about-facts {
    box-shadow: 0 0 0 1px rgba(12, 26, 43, 0.1);
  }
}

/* ---------- 通用正文块 ---------- */
.page-about .about-p {
  margin: 18px 0 0;
  font-size: 15.5px;
  line-height: 1.82;
  color: var(--c-slate);
  max-width: 62ch;
}

.page-about .about-p--note {
  border-left: 3px solid var(--c-cyan);
  padding-left: 14px;
  font-size: 14.5px;
  color: var(--c-ink);
}

/* ---------- 章节画板骨架 ---------- */
.page-about .about-board {
  display: grid;
  gap: 18px;
}

.page-about .about-board__rail {
  display: flex;
  align-items: center;
  gap: 14px;
}

.page-about .about-board__num {
  font-family: var(--font-mono);
  font-size: 40px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--c-clay);
  opacity: 0.42;
}

.page-about .about-board__label {
  font-size: 11px;
  letter-spacing: 0.28em;
  color: var(--c-slate);
  writing-mode: horizontal-tb;
}

.page-about .about-board__body {
  min-width: 0;
  border-top: 2px solid var(--c-ink);
  padding-top: 22px;
}

@media (min-width: 880px) {
  .page-about .about-board {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: 44px;
  }

  .page-about .about-board__rail {
    flex-direction: column;
    align-items: flex-start;
    gap: 18px;
    padding-top: 6px;
  }

  .page-about .about-board__num {
    font-size: 46px;
  }

  .page-about .about-board__label {
    writing-mode: vertical-rl;
    letter-spacing: 0.34em;
  }
}

.page-about .about-board .sec-head {
  margin-bottom: 4px;
}

.page-about .about-board .sec-head__note {
  color: var(--c-clay);
}

/* ---------- 索引行 ---------- */
.page-about .about-ledger {
  margin: 24px 0 20px;
  border-top: 1px solid var(--c-grid);
}

.page-about .about-ledger .ledger__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 4px;
  border-bottom: 1px solid var(--c-grid);
  font-size: 14.5px;
  color: var(--c-slate);
}

.page-about .about-ledger .ledger__row span:last-child {
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 700;
  color: var(--c-ink);
  white-space: nowrap;
}

/* ---------- 媒体框 ---------- */
.page-about .about-media {
  margin: 26px 0 0;
  position: relative;
  overflow: hidden;
}

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

.page-about .about-media .media__cap {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--c-clay);
}

/* ---------- 赛道列表 ---------- */
.page-about .track-list {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--c-grid);
}

.page-about .track-item {
  display: grid;
  gap: 8px;
  padding: 20px 2px;
  border-bottom: 1px solid var(--c-grid);
}

.page-about .track-item .tag {
  justify-self: start;
}

.page-about .track-item__title {
  margin: 0;
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--c-ink);
}

.page-about .track-item__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--c-slate);
  max-width: 60ch;
}

@media (min-width: 720px) {
  .page-about .track-item {
    grid-template-columns: 92px minmax(0, 1fr);
    grid-template-areas:
      "tag title"
      "tag text";
    column-gap: 22px;
    row-gap: 6px;
    align-items: start;
  }

  .page-about .track-item .tag {
    grid-area: tag;
    margin-top: 5px;
  }

  .page-about .track-item__title {
    grid-area: title;
  }

  .page-about .track-item__text {
    grid-area: text;
  }
}

/* ---------- 团队 ---------- */
.page-about .team-grid {
  display: grid;
  gap: 26px;
  margin-top: 4px;
}

.page-about .team-grid__media {
  margin-top: 0;
}

.page-about .team-stats {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(118px, 1fr));
  gap: 1px;
  background: var(--c-grid);
  border-top: 1px solid var(--c-grid);
  border-bottom: 1px solid var(--c-grid);
}

.page-about .team-stat {
  background: var(--c-canvas);
  padding: 16px 14px;
  display: grid;
  gap: 6px;
}

.page-about .team-stat__v {
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--c-orange);
}

.page-about .team-stat__k {
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--c-slate);
}

@media (min-width: 900px) {
  .page-about .team-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.92fr);
    gap: 40px;
    align-items: start;
  }
}

/* ---------- 校对流程 ---------- */
.page-about .flow-box {
  margin-top: 34px;
  padding: 22px 18px 20px;
  background: var(--c-paper);
  border-left: 3px solid var(--c-cyan);
}

.page-about .flow-box__cap {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.18em;
  color: var(--c-clay);
}

.page-about .about-flow {
  display: block;
  width: 100%;
  max-width: 620px;
  height: auto;
}

.page-about .about-flow rect {
  fill: none;
  stroke: var(--c-slate);
  stroke-width: 1.5;
}

.page-about .about-flow line {
  stroke: var(--c-grid);
  stroke-width: 1.6;
}

.page-about .about-flow line.is-alt {
  stroke: var(--c-cyan);
}

.page-about .about-flow text {
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 600;
  fill: var(--c-ink);
  text-anchor: middle;
}

.page-about .flow-box__note {
  margin: 14px 0 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--c-slate);
}

/* ---------- 时间轴色带 ---------- */
.page-about .about-band {
  background: var(--c-ink);
  color: var(--c-canvas);
  padding: 56px 0 60px;
  margin-top: 8px;
}

.page-about .about-band__head {
  border-bottom: 1px solid var(--about-hair-dark);
  padding-bottom: 20px;
}

.page-about .about-band__title {
  margin: 0;
  font-size: clamp(26px, 4.6vw, 40px);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.15;
}

.page-about .about-band__lead {
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(247, 242, 230, 0.76);
  max-width: 52ch;
}

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

.page-about .about-timeline__node {
  position: relative;
  padding: 24px 16px 24px 22px;
  border-bottom: 1px solid var(--about-hair-dark);
  transition: background var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .about-timeline__node::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--c-grid);
}

.page-about .about-timeline__node--data::before {
  background: var(--c-gold);
}

.page-about .about-timeline__node--product::before {
  background: var(--c-cyan);
}

.page-about .about-timeline__node--now::before {
  background: var(--c-orange);
}

.page-about .about-timeline__season {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: rgba(247, 242, 230, 0.6);
}

.page-about .about-timeline__title {
  margin: 10px 0 0;
  font-size: 19px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--c-canvas);
}

.page-about .about-timeline__text {
  margin: 8px 0 0;
  font-size: 13.5px;
  line-height: 1.78;
  color: rgba(247, 242, 230, 0.74);
}

@media (min-width: 860px) {
  .page-about .about-timeline {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .page-about .about-timeline__node {
    padding: 28px 18px 26px;
    border-bottom: 0;
    border-right: 1px solid var(--about-hair-dark);
  }

  .page-about .about-timeline__node:last-child {
    border-right: 0;
  }

  .page-about .about-timeline__node::before {
    left: 0;
    right: 0;
    bottom: auto;
    width: auto;
    height: 3px;
  }

  .page-about .about-timeline__node:hover,
  .page-about .about-timeline__node:focus-within {
    background: rgba(255, 255, 255, 0.055);
    transform: translateY(-4px);
  }
}

.page-about .about-versions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  margin-top: 34px;
  padding-top: 22px;
  border-top: 1px dashed var(--about-hair-dark);
}

.page-about .about-versions__lead {
  font-size: 13px;
  letter-spacing: 0.06em;
  color: rgba(247, 242, 230, 0.68);
}

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

.page-about .about-versions__list li {
  font-family: var(--font-mono);
  font-size: 13px;
  padding: 5px 11px;
  border: 1px solid rgba(22, 198, 208, 0.55);
  color: var(--c-cyan);
}

.page-about .about-versions__list li:last-child {
  background: var(--c-cyan);
  border-color: var(--c-cyan);
  color: var(--c-ink);
  font-weight: 700;
}

.page-about .about-versions__note {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: rgba(247, 242, 230, 0.62);
  flex: 1 1 240px;
}

/* ---------- 合作生态 ---------- */
.page-about .partner-grid {
  display: grid;
  gap: 28px;
  margin-top: 4px;
}

.page-about .partner-grid__media {
  margin-top: 0;
  order: -1;
}

.page-about .source-list {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--c-grid);
}

.page-about .source-item {
  display: grid;
  grid-template-columns: 16px minmax(0, 1fr);
  gap: 12px;
  padding: 16px 2px;
  border-bottom: 1px solid var(--c-grid);
}

.page-about .source-item .dot {
  margin-top: 7px;
}

.page-about .source-item__title {
  margin: 0;
  font-size: 16px;
  font-weight: 700;
  color: var(--c-ink);
}

.page-about .source-item__text {
  margin: 6px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--c-slate);
}

@media (min-width: 900px) {
  .page-about .partner-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.78fr);
    gap: 44px;
    align-items: start;
  }

  .page-about .partner-grid__media {
    order: 2;
  }
}

/* ---------- 服务规矩 ---------- */
.page-about .rule-list {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 0;
  counter-reset: none;
}

.page-about .rule-item {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 16px;
  padding: 20px 2px;
  border-bottom: 1px solid var(--c-grid);
}

.page-about .rule-item:first-child {
  border-top: 1px solid var(--c-grid);
}

.page-about .rule-item__idx {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  color: var(--c-clay);
  padding-top: 3px;
}

.page-about .rule-item__title {
  margin: 0;
  font-size: 17px;
  font-weight: 800;
  color: var(--c-ink);
  letter-spacing: -0.005em;
}

.page-about .rule-item__text {
  margin: 7px 0 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--c-slate);
  max-width: 62ch;
}

@media (min-width: 720px) {
  .page-about .rule-item {
    grid-template-columns: 64px minmax(0, 1fr);
    gap: 24px;
    padding: 22px 2px;
  }
}

/* ---------- 收尾 ---------- */
.page-about .about-cta {
  background: var(--c-paper);
  border-top: 2px solid var(--c-ink);
}

.page-about .about-cta__inner {
  display: grid;
  gap: 26px;
}

.page-about .about-cta__title {
  margin: 0;
  font-size: clamp(24px, 4.2vw, 34px);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.page-about .about-cta__lead {
  margin: 14px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-slate);
  max-width: 52ch;
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-self: center;
}

@media (min-width: 900px) {
  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 48px;
    align-items: center;
  }
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .about-timeline__node {
    transition: none;
  }

  .page-about .about-timeline__node:hover,
  .page-about .about-timeline__node:focus-within {
    transform: none;
  }
}
<<<END>>>