.page-about {
  --about-rail-w: 236px;
  --about-indent: clamp(20px, 3vw, 38px);
  display: block;
  padding-block: clamp(26px, 4vw, 52px) clamp(72px, 9vw, 128px);
}

.page-about .breadcrumbs {
  margin-bottom: clamp(22px, 3vw, 38px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  display: grid;
  gap: clamp(16px, 2vw, 24px);
  padding-bottom: clamp(38px, 5vw, 64px);
  border-bottom: 1px solid var(--line);
}

.page-about .about-hero__kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  color: var(--ice);
}

.page-about .about-hero__kicker::before {
  content: "";
  width: 24px;
  height: 1px;
  background: var(--ice);
}

.page-about .about-hero__title {
  margin: 0;
  max-width: 18ch;
  font-size: clamp(32px, 5vw, 62px);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--pale);
}

.page-about .about-hero__lede {
  margin: 0;
  max-width: 68ch;
  font-size: clamp(16px, 1.15vw, 17px);
  line-height: 1.85;
  color: var(--body-ink);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 6px;
}

/* ---------- 分栏骨架 ---------- */
.page-about .about-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(32px, 5vw, 56px);
  padding-top: clamp(40px, 5vw, 72px);
}

.page-about .about-rail {
  display: none;
  background: linear-gradient(180deg, rgba(29, 24, 64, 0.96), rgba(29, 24, 64, 0.82));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px 18px 24px;
  box-shadow: var(--shadow-soft);
}

.page-about .about-rail__title {
  margin: 0 0 14px;
  color: var(--mist);
}

.page-about .chapter-rail__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-about .chapter-rail__link {
  display: block;
  padding: 9px 12px;
  border-left: 2px solid transparent;
  color: var(--mist);
  font-size: 14px;
  line-height: 1.5;
  text-decoration: none;
  transition: color 0.22s ease, border-color 0.22s ease, background-color 0.22s ease;
}

.page-about .chapter-rail__link:hover,
.page-about .chapter-rail__link:focus-visible {
  color: var(--pale);
  background: rgba(138, 221, 255, 0.07);
}

.page-about .chapter-rail__link[aria-current="true"] {
  color: var(--ice);
  border-left-color: var(--ice);
  background: rgba(138, 221, 255, 0.08);
}

/* ---------- 纵向章节与时间轴 ---------- */
.page-about .about-body {
  position: relative;
  min-width: 0;
}

.page-about .chapter {
  position: relative;
  padding-left: var(--about-indent);
  padding-bottom: clamp(52px, 7vw, 92px);
}

.page-about .chapter:last-of-type {
  padding-bottom: clamp(28px, 3.4vw, 44px);
}

.page-about .chapter::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  bottom: 0;
  width: 1px;
  background: linear-gradient(180deg, var(--line-ice), var(--line) 45%, rgba(27, 46, 65, 0.35));
}

.page-about .chapter:last-of-type::before {
  bottom: auto;
  height: 46px;
}

.page-about .chapter::after {
  content: "";
  position: absolute;
  left: -3px;
  top: 7px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--ink);
  border: 1px solid var(--ice);
}

.page-about .chapter__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding-bottom: 14px;
  margin-bottom: clamp(20px, 2.6vw, 30px);
  border-bottom: 1px solid var(--line);
}

.page-about .chapter__index {
  min-width: 26px;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--ice);
}

.page-about .chapter__title {
  margin: 0;
  font-size: clamp(22px, 2.8vw, 32px);
  font-weight: 800;
  line-height: 1.28;
  letter-spacing: -0.015em;
  color: var(--pale);
}

.page-about .chapter__body {
  display: grid;
  gap: 16px;
}

.page-about .chapter__body p {
  margin: 0;
  max-width: 72ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--body-ink);
}

.page-about .chapter__body--split {
  gap: clamp(26px, 3.6vw, 44px);
}

/* ---------- 四条内容线 ---------- */
.page-about .lineup {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .lineup__item {
  display: grid;
  gap: 12px;
  align-content: start;
  padding: clamp(20px, 2.6vw, 30px);
  background: var(--ink);
  border-left: 2px solid var(--line);
  transition: background-color 0.24s ease;
}

.page-about .lineup__item:hover {
  background: rgba(29, 24, 64, 0.6);
}

.page-about .lineup__item--ice {
  border-left-color: var(--ice);
}

.page-about .lineup__item--aurora {
  border-left-color: var(--aurora);
}

.page-about .lineup__item--wine {
  border-left-color: var(--wine);
}

.page-about .lineup__item--amber {
  border-left-color: var(--amber);
}

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

.page-about .lineup__title {
  margin: 0;
  font-size: 19px;
  font-weight: 700;
  line-height: 1.45;
  color: var(--pale);
}

.page-about .lineup__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--body-ink);
}

.page-about .lineup__link {
  justify-self: start;
  padding-bottom: 2px;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--ice);
  text-decoration: none;
  border-bottom: 1px solid rgba(138, 221, 255, 0.4);
  transition: color 0.2s ease, border-color 0.2s ease;
}

.page-about .lineup__link:hover,
.page-about .lineup__link:focus-visible {
  color: var(--amber);
  border-bottom-color: var(--amber);
}

/* ---------- 图片容器 ---------- */
.page-about .media-frame {
  margin: 0 0 clamp(24px, 3vw, 34px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--teal);
}

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

.page-about .media-frame__caption {
  padding: 12px 16px;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--mist);
  border-top: 1px solid var(--line);
}

.page-about .media-frame--tall {
  margin-bottom: 0;
}

.page-about .media-frame--chart {
  margin-top: clamp(24px, 3vw, 34px);
  margin-bottom: clamp(24px, 3vw, 34px);
}

/* ---------- 团队 ---------- */
.page-about .team-grid {
  display: grid;
  gap: 1px;
  margin-top: clamp(24px, 3vw, 34px);
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .team-card {
  display: grid;
  gap: 14px;
  align-content: start;
  padding: clamp(22px, 2.8vw, 32px);
  background: var(--ink);
}

.page-about .team-card--data {
  background: linear-gradient(180deg, rgba(11, 60, 58, 0.55), rgba(6, 21, 35, 1) 72%);
}

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

.page-about .team-card__name {
  margin: 0;
  font-size: 20px;
  font-weight: 700;
  color: var(--pale);
}

.page-about .team-card__count {
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--aurora);
}

.page-about .team-card__intro {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--body-ink);
}

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

.page-about .duty {
  padding: 12px 0 12px 14px;
  border-top: 1px solid var(--line);
  border-left: 2px solid transparent;
  transition: border-color 0.22s ease, background-color 0.22s ease;
}

.page-about .duty:last-child {
  border-bottom: 1px solid var(--line);
}

.page-about .duty:hover,
.page-about .duty:focus-within {
  border-left-color: var(--ice);
  background: rgba(138, 221, 255, 0.05);
}

.page-about .duty__name {
  display: block;
  margin-bottom: 4px;
  font-size: 15px;
  font-weight: 500;
  color: var(--pale);
}

.page-about .duty__detail {
  display: block;
  font-size: 13.5px;
  line-height: 1.78;
  color: var(--mist);
  transition: color 0.22s ease;
}

.page-about .duty:hover .duty__detail,
.page-about .duty:focus-within .duty__detail {
  color: var(--body-ink);
}

.page-about .team-note {
  margin: clamp(22px, 2.8vw, 30px) 0 0;
  max-width: 74ch;
  padding-left: 16px;
  border-left: 2px solid var(--wine);
  font-size: 14.5px;
  line-height: 1.82;
  color: var(--body-ink);
}

/* ---------- 流程 ---------- */
.page-about .flow {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .flow__item {
  border-top: 1px solid var(--line);
}

.page-about .flow__item:last-child {
  border-bottom: 1px solid var(--line);
}

.page-about .flow__summary {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 6px 14px;
  align-items: baseline;
  padding: 16px 4px;
  cursor: pointer;
  list-style: none;
}

.page-about .flow__summary::-webkit-details-marker {
  display: none;
}

.page-about .flow__num {
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--ice);
}

.page-about .flow__name {
  font-size: 16px;
  font-weight: 500;
  color: var(--pale);
  transition: color 0.2s ease;
}

.page-about .flow__time {
  grid-column: 2;
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--mist);
}

.page-about .flow__step[open] .flow__name {
  color: var(--ice);
}

.page-about .flow__desc {
  margin: 0;
  padding: 0 4px 18px 30px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--body-ink);
}

.page-about .flow-total {
  margin: clamp(20px, 2.6vw, 28px) 0 0;
  max-width: 74ch;
  font-size: 14.5px;
  line-height: 1.82;
  color: var(--body-ink);
}

/* ---------- 规模 ---------- */
.page-about .metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .metric {
  display: grid;
  gap: 8px;
  align-content: start;
  padding: clamp(18px, 2.2vw, 26px);
  background: var(--ink);
}

.page-about .metric__value {
  font-size: clamp(28px, 3.4vw, 40px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--ice);
}

.page-about .metric__value--aurora {
  color: var(--aurora);
}

.page-about .metric__value--amber {
  color: var(--amber);
}

.page-about .metric__label {
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist);
}

/* ---------- 素材来源 ---------- */
.page-about .source-list {
  display: grid;
  gap: 1px;
  margin-top: clamp(22px, 2.8vw, 32px);
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .source-item {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr);
  gap: 16px;
  align-items: start;
  padding: clamp(16px, 2.2vw, 22px);
  background: var(--ink);
}

.page-about .source-item__key {
  padding-top: 3px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--aurora);
}

.page-about .source-item__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--body-ink);
}

.page-about .source-item__text a {
  color: var(--ice);
  text-decoration: none;
  border-bottom: 1px solid rgba(138, 221, 255, 0.4);
}

.page-about .source-item__text a:hover {
  color: var(--amber);
  border-bottom-color: var(--amber);
}

/* ---------- 接下来 ---------- */
.page-about .next-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(18px, 2.4vw, 28px);
}

.page-about .next-item {
  display: grid;
  grid-template-columns: 18px minmax(0, 1fr);
  gap: 16px;
  align-items: start;
}

.page-about .next-item__mark {
  position: relative;
  width: 12px;
  height: 12px;
  margin-top: 6px;
  border: 1px solid var(--amber);
  border-radius: 2px;
}

.page-about .next-item__mark::after {
  content: "";
  position: absolute;
  inset: 3px;
  background: var(--amber);
  border-radius: 1px;
}

.page-about .next-item__title {
  margin: 0 0 6px;
  font-size: 17px;
  font-weight: 700;
  color: var(--pale);
}

.page-about .next-item__text {
  margin: 0;
  max-width: 66ch;
  font-size: 14.5px;
  line-height: 1.82;
  color: var(--body-ink);
}

/* ---------- 收尾 ---------- */
.page-about .about-cta {
  display: grid;
  gap: 18px;
  margin-top: clamp(20px, 3vw, 34px);
  margin-left: var(--about-indent);
  padding: clamp(24px, 3.2vw, 38px);
  border: 1px solid var(--line);
  border-left: 2px solid var(--amber);
  border-radius: var(--radius);
  background: linear-gradient(135deg, rgba(29, 24, 64, 0.72), rgba(6, 21, 35, 1) 68%);
}

.page-about .about-cta__title {
  margin: 0;
  font-size: clamp(19px, 2.2vw, 24px);
  font-weight: 700;
  line-height: 1.4;
  color: var(--pale);
}

.page-about .about-cta__text {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.82;
  color: var(--body-ink);
}

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

/* ---------- 桌面栅格 ---------- */
@media (min-width: 720px) {
  .page-about .lineup {
    grid-template-columns: 1fr 1fr;
  }

  .page-about .flow__summary {
    grid-template-columns: auto minmax(0, 1fr) auto;
    gap: 0 18px;
    padding: 18px 4px;
  }

  .page-about .flow__time {
    grid-column: 3;
  }
}

@media (min-width: 820px) {
  .page-about .metrics {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .chapter__body--split {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .team-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 1000px) {
  .page-about .about-layout {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    gap: clamp(48px, 6vw, 104px);
  }

  .page-about .about-rail {
    display: block;
    position: sticky;
    top: calc(var(--header-h) + 30px);
    align-self: start;
    max-height: calc(100vh - var(--header-h) - 60px);
    overflow-y: auto;
  }
}

@media (min-width: 1280px) {
  .page-about {
    --about-rail-w: 268px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .chapter-rail__link,
  .page-about .lineup__item,
  .page-about .lineup__link,
  .page-about .duty,
  .page-about .duty__detail,
  .page-about .flow__name {
    transition: none;
  }
}
</｜｜DSML｜｜ parameter>
</｜｜DSML｜｜ invoke>
</output>