.page-about {
  --about-rail-w: 232px;
  --about-quote-bg: rgba(18, 58, 44, 0.78);
  --about-ring-size: 200px;
  background: var(--field);
  color: var(--paper);
}

/* 首屏 */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: calc(var(--header-total) + 40px) 0 52px;
  background: linear-gradient(158deg, var(--night) 0%, var(--field) 62%, var(--field) 100%);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  top: -18%;
  right: -22%;
  width: 74%;
  height: 136%;
  background: linear-gradient(206deg, rgba(47, 227, 192, 0.16), rgba(31, 122, 82, 0.07) 58%, transparent 100%);
  clip-path: polygon(30% 0, 100% 0, 72% 100%, 0 100%);
  pointer-events: none;
}

.page-about .about-hero-inner {
  position: relative;
  z-index: 1;
}

.page-about .about-crumbs {
  margin-bottom: 22px;
  font-size: 13px;
  color: var(--mist);
}

.page-about .about-crumbs a {
  color: var(--mist);
  text-decoration: none;
}

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

.page-about .about-hero h1 {
  margin: 14px 0 0;
  max-width: 20ch;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 7.2vw, 62px);
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-about .about-hero-lead {
  margin: 22px 0 0;
  max-width: 62ch;
  font-size: clamp(15px, 3.4vw, 17px);
  line-height: 1.85;
  color: rgba(243, 246, 241, 0.82);
}

.page-about .about-hero-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 40px 0 0;
  padding: 0;
  list-style: none;
  background: var(--line-soft);
  border: 1px solid var(--line);
}

.page-about .about-hero-stats .stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px 16px;
  background: rgba(6, 27, 19, 0.72);
}

.page-about .about-hero-stats .stat-value {
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  font-size: clamp(26px, 6vw, 36px);
  line-height: 1;
  color: var(--paper);
}

.page-about .about-hero-stats .stat-value--accent {
  color: var(--cyan);
}

.page-about .about-hero-stats .stat-label {
  font-size: 12.5px;
  line-height: 1.5;
  letter-spacing: 0.04em;
  color: var(--mist);
}

/* 布局骨架 */
.page-about .about-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  padding-bottom: 72px;
}

.page-about .about-rail {
  border-top: 1px solid var(--line-strong);
  padding-top: 16px;
}

.page-about .about-rail-title {
  margin: 0 0 14px;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--mist);
}

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

.page-about .rail-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-size: 13px;
  color: rgba(243, 246, 241, 0.78);
  text-decoration: none;
  transition: border-color 200ms ease, color 200ms ease, background-color 200ms ease;
}

.page-about .rail-num {
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  font-size: 11px;
  color: var(--mist);
}

.page-about .rail-link:hover,
.page-about .rail-link:focus-visible {
  border-color: var(--line-strong);
  color: var(--cyan);
}

.page-about .rail-link[data-active="true"] {
  border-color: var(--cyan);
  background: var(--cyan-soft);
  color: var(--cyan);
}

.page-about .rail-link[data-active="true"] .rail-num {
  color: var(--cyan);
}

/* 区块 */
.page-about .about-flow {
  min-width: 0;
}

.page-about .about-block {
  padding: 44px 0 8px;
  border-top: 1px solid var(--line-soft);
}

.page-about .about-block:first-child {
  border-top: 1px solid var(--line-strong);
  padding-top: 32px;
}

.page-about .about-block-head {
  margin-bottom: 22px;
}

.page-about .about-epoch {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--cyan);
}

.page-about .about-epoch .num {
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
}

.page-about .about-block-head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(22px, 5vw, 36px);
  line-height: 1.24;
  letter-spacing: -0.015em;
  color: var(--paper);
}

.page-about .about-body p {
  margin: 0 0 18px;
  font-size: clamp(15px, 3.4vw, 16.5px);
  line-height: 1.85;
  color: rgba(243, 246, 241, 0.82);
}

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

/* 印刷引言块 */
.page-about .about-quote {
  position: relative;
  margin: 30px 0 12px;
  padding: 24px 22px 24px 26px;
  background: var(--about-quote-bg);
  border: 1px solid var(--line);
  border-left: 3px solid var(--cyan);
  box-shadow: var(--shadow-panel);
}

.page-about .about-quote::before {
  content: "";
  position: absolute;
  inset: 6px;
  border: 1px solid var(--line-soft);
  pointer-events: none;
}

.page-about .about-quote-index {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--cyan);
}

.page-about .about-quote p {
  position: relative;
  margin: 0;
  font-size: clamp(15px, 3.6vw, 18px);
  line-height: 1.78;
  color: var(--paper);
}

/* 图片 */
.page-about .about-figure {
  margin: 30px 0 12px;
}

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

.page-about .about-breath {
  margin: 0 0 34px;
}

.page-about .about-breath .media-frame {
  border: 1px solid var(--line);
}

.page-about .media-caption {
  margin-top: 10px;
  font-size: 12.5px;
  line-height: 1.72;
  color: var(--mist);
}

/* 覆盖环 */
.page-about .about-ring-wrap {
  position: relative;
  width: var(--about-ring-size);
  max-width: 100%;
  margin: 28px auto 26px;
}

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

.page-about .ring-seg {
  transition: stroke-width 200ms ease;
}

.page-about .ring-group:hover .ring-seg {
  stroke-width: 20;
}

.page-about .ring-center {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  pointer-events: none;
}

.page-about .ring-center-num {
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  font-size: 34px;
  line-height: 1;
  color: var(--paper);
}

.page-about .ring-center-label {
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.page-about .ring-tip {
  position: absolute;
  left: 50%;
  bottom: -6px;
  transform: translate(-50%, 8px);
  margin: 0;
  padding: 4px 10px;
  border: 1px solid var(--line-strong);
  background: var(--night);
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  white-space: nowrap;
  color: var(--cyan);
  opacity: 0;
  transition: opacity 180ms ease, transform 180ms ease;
  pointer-events: none;
}

.page-about .about-ring-wrap:has(.ring-hit--eu:hover) .ring-tip--eu,
.page-about .about-ring-wrap:has(.ring-hit--sa:hover) .ring-tip--sa,
.page-about .about-ring-wrap:has(.ring-hit--as:hover) .ring-tip--as {
  opacity: 1;
  transform: translate(-50%, 0);
}

.page-about .about-legend {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin: 0 0 12px;
  padding: 0;
  list-style: none;
  background: var(--line-soft);
  border: 1px solid var(--line);
}

.page-about .about-legend-item {
  display: grid;
  grid-template-columns: 12px minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  background: rgba(6, 27, 19, 0.7);
}

.page-about .about-swatch {
  width: 12px;
  height: 12px;
  border-radius: 2px;
  background: var(--cyan);
}

.page-about .about-legend-item--sa .about-swatch {
  background: var(--grass);
}

.page-about .about-legend-item--as .about-swatch {
  background: var(--orange);
}

.page-about .about-legend-name {
  font-size: 14px;
  color: rgba(243, 246, 241, 0.86);
}

.page-about .about-legend-num {
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  font-size: 18px;
  color: var(--paper);
}

/* 更新节奏 */
.page-about .about-rhythm {
  margin: 24px 0 12px;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line);
}

.page-about .rhythm-item {
  padding: 18px 18px 20px;
  background: rgba(18, 58, 44, 0.5);
  border-left: 2px solid transparent;
  transition: background-color 200ms ease, border-color 200ms ease;
}

.page-about .rhythm-item:hover {
  background: rgba(18, 58, 44, 0.8);
  border-left-color: var(--cyan);
}

.page-about .rhythm-when {
  margin: 0 0 8px;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--yellow);
}

.page-about .rhythm-when .num {
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
}

.page-about .rhythm-what {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(243, 246, 241, 0.82);
}

/* 时间轴 */
.page-about .about-timeline {
  margin: 26px 0 12px;
}

.page-about .about-timeline .timeline-track {
  display: flex;
  gap: 14px;
  margin: 0;
  padding: 0 0 14px;
  list-style: none;
  overflow-x: auto;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
}

.page-about .timeline-item {
  position: relative;
  flex: 0 0 78%;
  scroll-snap-align: start;
  padding: 22px 18px 20px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-top: 2px solid var(--grass);
}

.page-about .timeline-node {
  position: absolute;
  top: -7px;
  left: 18px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 3px rgba(47, 227, 192, 0.18);
}

.page-about .timeline-year {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--cyan);
}

.page-about .timeline-title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 16px;
  line-height: 1.4;
  color: var(--paper);
}

.page-about .timeline-text {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.78;
  color: rgba(243, 246, 241, 0.74);
}

/* 行动入口 */
.page-about .about-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 30px 0 56px;
}

.page-about .about-cta .btn {
  text-decoration: none;
}

/* 桌面端 */
@media (min-width: 901px) {
  .page-about .about-hero {
    padding: calc(var(--header-total) + 64px) 0 76px;
  }

  .page-about .about-hero-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    margin-top: 52px;
  }

  .page-about .about-layout {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    gap: clamp(40px, 5vw, 76px);
    padding-top: 24px;
    padding-bottom: 96px;
  }

  .page-about .about-rail {
    border-top: none;
    padding-top: 0;
  }

  .page-about .about-rail-inner {
    position: sticky;
    top: calc(var(--header-total) + 28px);
    border-top: 2px solid var(--cyan);
    padding-top: 18px;
  }

  .page-about .about-rail-title {
    margin-bottom: 18px;
  }

  .page-about .about-rail-list {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 2px;
    position: relative;
    padding-left: 16px;
  }

  .page-about .about-rail-list::before {
    content: "";
    position: absolute;
    left: 3px;
    top: 6px;
    bottom: 6px;
    width: 1px;
    background: var(--line);
  }

  .page-about .rail-link {
    border: none;
    border-radius: 0;
    padding: 9px 0 9px 10px;
    background: none;
    font-size: 13.5px;
    transition: color 200ms ease, transform 200ms ease;
  }

  .page-about .rail-link::before {
    content: "";
    position: absolute;
    left: -16px;
    width: 7px;
    height: 7px;
    margin-top: 1px;
    border-radius: 50%;
    background: var(--line-strong);
    transition: background-color 200ms ease, box-shadow 200ms ease;
  }

  .page-about .rail-link {
    position: relative;
  }

  .page-about .rail-link:hover {
    transform: translateX(3px);
  }

  .page-about .rail-link[data-active="true"] {
    background: none;
    color: var(--cyan);
    transform: translateX(3px);
  }

  .page-about .rail-link[data-active="true"]::before {
    background: var(--cyan);
    box-shadow: 0 0 0 4px rgba(47, 227, 192, 0.16);
  }

  .page-about .about-block {
    padding: 56px 0 12px;
  }

  .page-about .about-block:first-child {
    padding-top: 40px;
  }

  .page-about .about-body {
    max-width: 68ch;
  }

  .page-about .about-quote {
    margin-left: clamp(0px, 6%, 64px);
  }

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

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

  .page-about .about-ring-wrap {
    --about-ring-size: 236px;
    margin: 34px 0 30px;
  }

  .page-about .timeline-item {
    flex: 0 0 240px;
  }

  .page-about .about-figure {
    margin-top: 36px;
    max-width: 720px;
  }
}

@media (min-width: 1200px) {
  .page-about .about-hero h1 {
    max-width: 22ch;
  }

  .page-about .timeline-item {
    flex: 1 1 0;
  }
}
</｜｜DSML｜｜ parameter>
</｜｜DSML｜｜ invoke>
</｜｜DSML｜｜ calls>