.page-about {
  --about-axis: rgba(217, 164, 65, 0.55);
  --about-line-dark: rgba(16, 35, 58, 0.12);
  --about-line-light: rgba(244, 239, 230, 0.16);
  --about-body-dark: rgba(16, 35, 58, 0.72);
  --about-body-light: rgba(244, 239, 230, 0.76);
  overflow-x: clip;
  background: var(--ink);
  color: var(--paper);
}

/* 面包屑与首屏 */
.page-about .about-crumb {
  padding-top: clamp(18px, 3vw, 30px);
}

.page-about .about-hero {
  position: relative;
  padding: clamp(36px, 6vw, 72px) 0 clamp(52px, 8vw, 108px);
  background:
    radial-gradient(110% 80% at 84% 0%, rgba(200, 50, 42, 0.16), transparent 62%),
    radial-gradient(90% 70% at 6% 100%, rgba(31, 107, 79, 0.22), transparent 58%),
    var(--ink);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 4px;
  background: linear-gradient(90deg,
    var(--red) 0 26%,
    var(--gold) 26% 56%,
    var(--green) 56% 78%,
    var(--gold) 78% 100%);
  opacity: 0.85;
}

.page-about .about-hero .display {
  margin: clamp(12px, 2vw, 22px) 0 clamp(16px, 2.4vw, 26px);
  color: var(--paper);
  line-height: 1.05;
}

.page-about .about-hero__lede {
  font-size: clamp(16px, 1.6vw, 19px);
  line-height: 1.85;
  color: var(--about-body-light);
  max-width: 60ch;
}

.page-about .about-hero .hand-remark {
  margin: clamp(18px, 3vw, 30px) 0 0;
}

/* 展区通用节奏 */
.page-about .section {
  position: relative;
}

.page-about .about-lead {
  margin-top: clamp(14px, 2vw, 22px);
  font-size: clamp(16px, 1.6vw, 18px);
  line-height: 1.85;
}

.page-about .about-row {
  display: grid;
  gap: clamp(28px, 4vw, 52px);
  align-items: start;
}

.page-about .about-row__text > * + * {
  margin-top: clamp(14px, 2vw, 20px);
}

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

/* 展示牌标题微调 */
.page-about .exhibit-label {
  margin-bottom: clamp(18px, 2.6vw, 26px);
}

/* A-02 时间轴 */
.page-about .timeline {
  list-style: none;
  margin: clamp(28px, 4vw, 44px) 0 0;
  padding: 0 0 0 32px;
  position: relative;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, var(--gold) 0%, rgba(217, 164, 65, 0.15) 100%);
}

.page-about .timeline__node {
  position: relative;
  padding-bottom: clamp(28px, 4vw, 48px);
}

.page-about .timeline__node:last-child {
  padding-bottom: 0;
}

.page-about .timeline__node::before {
  content: "";
  position: absolute;
  left: -28px;
  top: 0.55em;
  width: 11px;
  height: 11px;
  margin-left: -6px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 5px var(--paper), 0 0 0 6px var(--about-line-dark);
}

.page-about .timeline__ver {
  display: block;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(40px, 7.5vw, 84px);
  line-height: 0.95;
  letter-spacing: -0.03em;
  color: rgba(16, 35, 58, 0.2);
  font-variant-numeric: tabular-nums;
  margin-bottom: 6px;
}

.page-about .timeline__title {
  margin: 0 0 8px;
  font-size: clamp(19px, 2.2vw, 24px);
  font-weight: 500;
  color: var(--ink);
  line-height: 1.4;
}

.page-about .timeline__desc {
  margin: 0;
  max-width: 60ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--about-body-dark);
}

/* A-03 说明牌 */
.page-about .about-plate {
  padding: clamp(22px, 3.4vw, 38px);
  background: rgba(27, 51, 80, 0.55);
  border: 1px solid var(--gold);
  display: flex;
  flex-direction: column;
  gap: clamp(16px, 2.4vw, 22px);
}

.page-about .about-plate .index-note {
  color: var(--gold);
}

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

.page-about .about-plate__steps li {
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr);
  align-items: baseline;
  gap: 10px;
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(217, 164, 65, 0.22);
  color: var(--about-body-light);
  line-height: 1.75;
}

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

.page-about .about-plate__no {
  font-family: var(--font-index);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--gold);
}

.page-about .about-plate__link {
  align-self: flex-start;
}

/* A-04 团队分工 */
.page-about .about-team {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
  margin-top: clamp(22px, 3.4vw, 34px);
  align-items: start;
}

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

.page-about .ratio-bars {
  list-style: none;
  margin: clamp(20px, 3vw, 28px) 0 0;
  padding: 0;
  display: grid;
  gap: clamp(16px, 2.4vw, 24px);
}

.page-about .ratio-bar {
  transition: transform 0.35s var(--ease);
}

.page-about .ratio-bar__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}

.page-about .ratio-bar__name {
  font-size: 17px;
  font-weight: 500;
  color: var(--ink);
}

.page-about .ratio-bar__num {
  font-family: var(--font-index);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--red);
}

.page-about .ratio-bar__track {
  margin: 9px 0 9px;
  height: 8px;
  background: rgba(16, 35, 58, 0.1);
  overflow: hidden;
}

.page-about .ratio-bar__fill {
  display: block;
  height: 100%;
  transition: filter 0.3s var(--ease);
}

.page-about .ratio-bar__fill--a {
  width: 43%;
  background: var(--red);
}

.page-about .ratio-bar__fill--b {
  width: 36%;
  background: var(--green);
}

.page-about .ratio-bar__fill--c {
  width: 21%;
  background: var(--gold);
}

.page-about .ratio-bar__note {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--about-body-dark);
}

@media (hover: hover) {
  .page-about .ratio-bar:hover {
    transform: translateX(5px);
  }

  .page-about .ratio-bar:hover .ratio-bar__fill {
    filter: brightness(1.15) saturate(1.1);
  }
}

/* A-05 内容来源 */
.page-about .source-strip {
  display: grid;
  gap: clamp(14px, 2.4vw, 24px);
  margin-top: clamp(26px, 4vw, 44px);
}

.page-about .source-source {
  position: relative;
  padding: clamp(20px, 3vw, 32px);
  background: rgba(27, 51, 80, 0.55);
  border-top: 2px solid var(--green);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.page-about .source-source .index-note {
  color: var(--gold);
}

.page-about .source-source h3 {
  margin: 0;
  font-size: clamp(19px, 2.2vw, 25px);
  font-weight: 400;
  line-height: 1.4;
  color: var(--paper);
}

.page-about .source-source p {
  margin: 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--about-body-light);
}

.page-about .source-source--main {
  background: linear-gradient(158deg, rgba(200, 50, 42, 0.26), rgba(27, 51, 80, 0.62) 62%);
  border-top-color: var(--red);
}

.page-about .source-source:last-child {
  border-top-color: var(--gold);
}

/* A-06 年度回顾 */
.page-about .about-batch {
  margin: clamp(24px, 4vw, 40px) 0 0;
}

.page-about .about-06__cta {
  margin-top: clamp(24px, 4vw, 40px);
  padding-top: clamp(20px, 3vw, 28px);
  border-top: 1px solid var(--about-line-dark);
}

.page-about .about-06__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 18px;
}

/* 响应式 */
@media (min-width: 760px) {
  .page-about .source-strip {
    grid-template-columns: 1.5fr 1fr 0.9fr;
    align-items: stretch;
  }
}

@media (min-width: 880px) {
  .page-about .about-01 .about-row {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

  .page-about .about-03 .about-row {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: stretch;
  }

  .page-about .about-01 .about-row__figure {
    margin-right: calc(-1 * var(--gutter));
  }

  .page-about .about-batch {
    margin-left: calc(-1 * var(--gutter));
    margin-right: calc(-1 * var(--gutter));
  }
}

@media (min-width: 900px) {
  .page-about .about-team {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ratio-bar,
  .page-about .ratio-bar__fill {
    transition: none;
  }

  .page-about .ratio-bar:hover {
    transform: none;
  }
}
<<<END>>>