.page-about {
  background: var(--ink);
  color: var(--paper);
}

.page-about [id] {
  scroll-margin-top: calc(var(--header-h) + 1.25rem);
}

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

.page-about a:hover,
.page-about a:focus-visible {
  color: var(--cyan-soft);
}

/* ---------- 封面 ---------- */
.page-about .about-cover {
  position: relative;
  overflow: hidden;
  padding-block: calc(var(--header-h) * 0.5) clamp(2rem, 5vw, 3.5rem);
  background:
    radial-gradient(120% 90% at 88% -10%, rgba(54, 224, 208, 0.14), transparent 58%),
    radial-gradient(90% 70% at 6% 110%, rgba(180, 81, 46, 0.12), transparent 62%),
    var(--ink);
}

.page-about .about-cover::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, var(--grid-soft) 1px, transparent 1px),
    linear-gradient(to bottom, var(--grid-soft) 1px, transparent 1px);
  background-size: 72px 72px;
  opacity: 0.35;
  pointer-events: none;
}

.page-about .about-cover::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 180px;
  background: linear-gradient(transparent, rgba(7, 11, 15, 0.9));
  pointer-events: none;
}

.page-about .about-cover .container {
  position: relative;
  z-index: 1;
}

.page-about .breadcrumbs {
  margin-bottom: clamp(1.5rem, 4vw, 2.5rem);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  color: var(--rock);
}

.page-about .breadcrumbs a {
  color: var(--paper-dim);
}

.page-about .about-cover__grid {
  display: grid;
  gap: clamp(1.75rem, 4vw, 3rem);
}

.page-about .about-title {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(2.6rem, 9vw, 5.6rem);
  line-height: 0.96;
  letter-spacing: 0.005em;
  margin: 0.5rem 0 1.25rem;
  color: var(--paper);
}

.page-about .about-cover__intro {
  max-width: 60ch;
  font-size: clamp(0.95rem, 1.6vw, 1.0625rem);
  line-height: 1.8;
  color: var(--paper-dim);
}

.page-about .about-cover__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.75rem;
}

.page-about .about-cover__index {
  border-top: 1px solid var(--grid);
  padding-top: 1rem;
}

.page-about .about-index__label {
  margin: 0 0 0.75rem;
  font-size: 0.6875rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--rock);
}

.page-about .about-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.125rem;
}

.page-about .about-index__list a {
  display: flex;
  align-items: baseline;
  gap: 0.625rem;
  padding: 0.4375rem 0;
  border-bottom: 1px solid rgba(36, 49, 58, 0.7);
  font-size: 0.8125rem;
  color: var(--paper-dim);
}

.page-about .about-index__list a:hover,
.page-about .about-index__list a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.page-about .about-index__num {
  font-family: var(--font-num);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--cyan);
  min-width: 1.5rem;
}

.page-about .about-band {
  margin-top: clamp(2rem, 5vw, 3.25rem);
  padding-top: 1.25rem;
  border-top: 1px solid var(--grid);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.25rem 1rem;
}

.page-about .about-band .stat {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

.page-about .about-band .stat__value {
  font-family: var(--font-num);
  font-weight: 300;
  font-size: clamp(1.85rem, 5vw, 3rem);
  line-height: 1;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .about-band .stat__value--cyan {
  color: var(--cyan);
}

.page-about .about-band .stat__label {
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--rock);
}

/* ---------- 通用区块 ---------- */
.page-about .about-block {
  position: relative;
  border-top: 1px solid var(--grid);
  background: var(--ink);
}

.page-about .about-block--timeline {
  background:
    linear-gradient(180deg, rgba(16, 24, 32, 0.9), rgba(7, 11, 15, 0.95));
}

.page-about .about-block--last {
  padding-bottom: clamp(3rem, 6vw, 5rem);
}

.page-about .about-split {
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.75rem);
}

.page-about .about-split__aside .h2 {
  margin: 0.5rem 0 1rem;
}

.page-about .about-note {
  margin: 0;
  max-width: 34ch;
  font-size: 0.875rem;
  line-height: 1.75;
  color: var(--rock);
}

.page-about .about-split__body {
  min-width: 0;
}

/* ---------- 场景卡 ---------- */
.page-about .about-scene__cards {
  display: grid;
  gap: 1rem;
}

.page-about .about-scene__card {
  padding: 1.375rem 1.25rem 1.5rem;
  background: var(--panel);
  border-left: 2px solid var(--cyan);
  border-radius: 0;
}

.page-about .about-scene__card:nth-child(2) {
  border-left-color: var(--ochre);
}

.page-about .about-scene__card:nth-child(3) {
  border-left-color: var(--flag-blue);
}

.page-about .about-scene__kicker {
  margin: 0 0 0.5rem;
  font-size: 0.6875rem;
  letter-spacing: 0.2em;
  color: var(--cyan-soft);
}

.page-about .about-scene__card:nth-child(2) .about-scene__kicker {
  color: var(--ochre);
}

.page-about .about-scene__card:nth-child(3) .about-scene__kicker {
  color: var(--flag-blue);
}

.page-about .about-scene__card .h3 {
  margin: 0 0 0.625rem;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(1.25rem, 2.6vw, 1.5rem);
  letter-spacing: 0.01em;
}

.page-about .about-scene__card p:last-child {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--paper-dim);
}

/* ---------- 矩阵 ---------- */
.page-about .about-matrix__figure {
  margin: 0;
  padding: 1rem;
  background: var(--panel-2);
  border: 1px solid var(--grid);
}

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

.page-about .mx-line {
  stroke: var(--grid);
  stroke-width: 2;
  stroke-dasharray: 6 6;
}

.page-about .mx-box {
  fill: rgba(16, 24, 32, 0.9);
  stroke: var(--grid);
  stroke-width: 1.5;
  transition: fill var(--dur) var(--ease), stroke var(--dur) var(--ease);
}

.page-about .mx-box--core {
  fill: rgba(54, 224, 208, 0.08);
  stroke: var(--cyan);
}

.page-about .mx-label {
  fill: var(--paper);
  font-family: var(--font-display);
  font-size: 26px;
  letter-spacing: 0.04em;
}

.page-about .mx-label--core {
  fill: var(--cyan);
}

.page-about .mx-sub {
  fill: var(--rock);
  font-family: var(--font-body);
  font-size: 16px;
  letter-spacing: 0.04em;
}

.page-about .mx-term:hover .mx-box {
  fill: rgba(54, 224, 208, 0.14);
  stroke: var(--cyan);
}

.page-about .mx-term:hover .mx-label {
  fill: var(--cyan-soft);
}

.page-about .media-frame__caption {
  margin-top: 0.75rem;
  font-size: 0.75rem;
  line-height: 1.7;
  color: var(--rock);
}

.page-about .about-matrix__terms {
  display: grid;
  gap: 1px;
  margin-top: 1.25rem;
  background: var(--grid);
  border: 1px solid var(--grid);
}

.page-about .about-term {
  background: var(--panel);
  padding: 1.125rem 1.125rem 1.25rem;
}

.page-about .about-term__name {
  margin: 0 0 0.5rem;
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 400;
  letter-spacing: 0.03em;
  color: var(--cyan);
}

.page-about .about-term__role {
  margin: 0 0 0.75rem;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--paper-dim);
}

.page-about .about-term__scale {
  margin: 0;
  padding-top: 0.625rem;
  border-top: 1px solid var(--grid);
  font-family: var(--font-num);
  font-size: 0.8125rem;
  letter-spacing: 0.06em;
  color: var(--rock);
}

.page-about .about-matrix__shot {
  margin: 1.25rem 0 0;
}

.page-about .about-matrix__shot img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--grid);
}

.page-about .about-shared {
  margin-top: 1.25rem;
  padding: 1.125rem 1.25rem;
  border-left: 2px solid var(--cyan);
  background: rgba(54, 224, 208, 0.06);
}

.page-about .about-shared p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--paper-dim);
}

.page-about .about-shared strong {
  color: var(--paper);
  font-weight: 600;
}

/* ---------- 时间轴 ---------- */
.page-about .about-years {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1.25rem 0 1.5rem;
}

.page-about .about-year {
  display: inline-block;
  padding: 0.3125rem 0.625rem;
  border: 1px solid var(--grid);
  font-family: var(--font-num);
  font-size: 0.8125rem;
  letter-spacing: 0.08em;
  color: var(--paper-dim);
}

.page-about .about-year:hover,
.page-about .about-year:focus-visible {
  border-color: var(--cyan);
  color: var(--cyan);
}

.page-about .about-timeline__bg {
  margin: 0;
  display: none;
}

.page-about .about-timeline__bg img {
  display: block;
  width: 100%;
  height: auto;
  opacity: 0.75;
  border: 1px solid var(--grid);
}

.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 1.25rem;
  border-left: 1px solid var(--grid);
}

.page-about .about-node {
  position: relative;
  padding: 1.25rem 0 1.5rem 0.25rem;
  border-bottom: 1px solid var(--grid);
  transition: background var(--dur) var(--ease);
}

.page-about .about-node:last-child {
  border-bottom: none;
  padding-bottom: 0.5rem;
}

.page-about .about-node::before {
  content: "";
  position: absolute;
  left: calc(-1.25rem - 5.5px);
  top: 1.75rem;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 3px var(--ink);
}

.page-about .about-node:nth-child(2)::before { background: var(--cyan-soft); }
.page-about .about-node:nth-child(3)::before { background: var(--flag-blue); }
.page-about .about-node:nth-child(4)::before { background: var(--flag-green); }
.page-about .about-node:nth-child(5)::before { background: var(--flag-yellow); }
.page-about .about-node:nth-child(6)::before { background: var(--ochre); }

.page-about .about-node:target {
  background: linear-gradient(90deg, rgba(54, 224, 208, 0.1), transparent 70%);
}

.page-about .about-node:target::before {
  background: var(--cyan);
  box-shadow: 0 0 0 3px var(--ink), 0 0 0 6px rgba(54, 224, 208, 0.25);
}

.page-about .about-node__year {
  margin: 0 0 0.25rem;
  font-family: var(--font-num);
  font-weight: 300;
  font-size: clamp(2rem, 7vw, 3.25rem);
  line-height: 1;
  letter-spacing: -0.01em;
  color: rgba(242, 237, 228, 0.34);
}

.page-about .about-node:target .about-node__year {
  color: var(--cyan);
}

.page-about .about-node__title {
  margin: 0 0 0.5rem;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(1.0625rem, 2.4vw, 1.3125rem);
  letter-spacing: 0.02em;
  color: var(--paper);
}

.page-about .about-node__text {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--paper-dim);
  max-width: 52ch;
}

/* ---------- 运营 ---------- */
.page-about .about-ops {
  display: grid;
  gap: 1.25rem;
}

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

.page-about .about-ops__figure img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--grid);
}

.page-about .about-ops__figure .media-frame__caption {
  margin-top: 0.625rem;
}

.page-about .about-ops__list {
  display: grid;
  gap: 1px;
  background: var(--grid);
  border: 1px solid var(--grid);
}

.page-about .about-ops__item {
  display: grid;
  grid-template-columns: 4.5rem minmax(0, 1fr);
  align-items: baseline;
  gap: 0.75rem;
  padding: 1rem 1.125rem;
  background: var(--panel-2);
}

.page-about .about-ops__num {
  font-family: var(--font-num);
  font-weight: 300;
  font-size: clamp(1.5rem, 4.5vw, 2rem);
  line-height: 1;
  letter-spacing: -0.01em;
  color: var(--cyan);
  text-align: right;
}

.page-about .about-ops__item p {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.75;
  color: var(--paper-dim);
}

/* ---------- 规模表 ---------- */
.page-about .about-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9375rem;
}

.page-about .about-table__caption {
  caption-side: top;
  text-align: left;
  padding-bottom: 0.75rem;
  font-size: 0.6875rem;
  letter-spacing: 0.2em;
  color: var(--rock);
}

.page-about .about-table th,
.page-about .about-table td {
  padding: 0.8125rem 0.5rem 0.8125rem 0;
  border-bottom: 1px solid var(--grid);
  text-align: left;
  vertical-align: baseline;
}

.page-about .about-table th {
  font-weight: 400;
  color: var(--rock);
  width: 42%;
  font-size: 0.8125rem;
  letter-spacing: 0.04em;
}

.page-about .about-table td {
  font-family: var(--font-num);
  font-size: 1rem;
  letter-spacing: 0.03em;
  color: var(--paper);
}

.page-about .about-table tr:hover td {
  color: var(--cyan-soft);
}

.page-about .about-table__note {
  margin: 1rem 0 0;
  font-size: 0.8125rem;
  line-height: 1.75;
  color: var(--rock);
}

/* ---------- 合作 ---------- */
.page-about .about-partners {
  display: grid;
  gap: 1rem;
}

.page-about .about-partners__card {
  padding: 1.25rem;
  background: var(--panel);
  border-top: 1px solid var(--cyan);
  border-radius: 0;
}

.page-about .about-partners__card .h3 {
  margin: 0 0 0.625rem;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 1.3125rem;
  letter-spacing: 0.02em;
  color: var(--cyan);
}

.page-about .about-partners__card p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--paper-dim);
}

.page-about .about-honor {
  list-style: none;
  margin: 1.25rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.75rem;
}

.page-about .about-honor li {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.625rem;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--grid);
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--paper-dim);
}

/* ---------- 原则 ---------- */
.page-about .about-principles {
  display: grid;
  gap: 1px;
  background: var(--grid);
  border: 1px solid var(--grid);
}

.page-about .about-principle {
  background: var(--panel);
  padding: 1.25rem 1.125rem;
}

.page-about .about-principle__num {
  display: block;
  margin-bottom: 0.5rem;
  font-family: var(--font-num);
  font-size: 0.8125rem;
  letter-spacing: 0.14em;
  color: var(--ochre);
}

.page-about .about-principle .h3 {
  margin: 0 0 0.5rem;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 1.1875rem;
  letter-spacing: 0.02em;
  color: var(--paper);
}

.page-about .about-principle p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--paper-dim);
}

.page-about .about-next {
  margin-top: 1.5rem;
  padding: 1.25rem;
  border: 1px solid var(--grid);
  background:
    linear-gradient(120deg, rgba(54, 224, 208, 0.08), rgba(7, 11, 15, 0) 65%),
    var(--panel-2);
}

.page-about .about-next__lead {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-size: 1.125rem;
  letter-spacing: 0.03em;
  color: var(--paper);
}

.page-about .about-next__links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

/* ---------- 中等屏幕 ---------- */
@media (min-width: 720px) {
  .page-about .about-band {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .page-about .about-scene__card:nth-child(3) {
    grid-column: 1 / -1;
  }

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

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

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

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

/* ---------- 桌面屏 ---------- */
@media (min-width: 980px) {
  .page-about .about-cover {
    padding-block: calc(var(--header-h) * 0.9) clamp(3rem, 5vw, 4.5rem);
  }

  .page-about .about-cover__grid {
    grid-template-columns: minmax(0, 1fr) 280px;
    align-items: start;
  }

  .page-about .about-cover__index {
    border-top: none;
    border-left: 1px solid var(--grid);
    padding-top: 0;
    padding-left: 1.5rem;
  }

  .page-about .about-split {
    grid-template-columns: 250px minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-split__aside {
    position: sticky;
    top: calc(var(--header-h) + 1.5rem);
    align-self: start;
  }

  .page-about .about-timeline__bg {
    display: block;
    margin-top: 1.5rem;
  }

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

  .page-about .about-scene__card:nth-child(2) {
    margin-top: 1.75rem;
  }

  .page-about .about-scene__card:nth-child(3) {
    grid-column: auto;
    margin-top: 3.5rem;
  }

  .page-about .about-node {
    display: grid;
    grid-template-columns: 8rem minmax(0, 1fr);
    column-gap: 1.75rem;
    padding: 1.75rem 0 1.75rem 1rem;
  }

  .page-about .about-node__year {
    grid-row: 1 / span 3;
    grid-column: 1;
    font-size: clamp(2.4rem, 3.6vw, 3.5rem);
    padding-top: 0.125rem;
  }

  .page-about .about-node__title,
  .page-about .about-node__text {
    grid-column: 2;
  }

  .page-about .about-ops {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: start;
  }

  .page-about .about-timeline {
    padding-left: 2rem;
  }

  .page-about .about-node::before {
    left: calc(-2rem - 5.5px);
    top: 2.25rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .mx-box,
  .page-about .about-node,
  .page-about .about-year {
    transition: none;
  }
}
<<<END>>>