.page-about {
  --about-rail: 56px;
  --about-line: rgba(147, 162, 176, .26);
  --about-rule: rgba(198, 161, 75, .38);
  --about-paper-ink: #3A4753;
  background: var(--night);
  color: var(--chalk);
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: 1.75;
}

.page-about .about-crumb {
  padding-top: clamp(14px, 2.4vw, 22px);
}

.page-about .about-crumb .breadcrumb {
  color: var(--mist);
  font-size: var(--fs-label);
  letter-spacing: .12em;
}

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

.page-about .about-crumb .breadcrumb a:hover {
  color: var(--gold);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(26px, 5vw, 58px) 0 clamp(38px, 6vw, 76px);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 84% 8%, rgba(226, 58, 46, .20), transparent 48%),
    linear-gradient(180deg, var(--ink) 0%, var(--night) 72%);
  z-index: 0;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(28px, 5vw, 52px);
}

.page-about .about-hero__copy .label {
  display: inline-block;
  margin-bottom: 16px;
}

.page-about .about-hero h1 {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-weight: 900;
  font-stretch: condensed;
  letter-spacing: -.02em;
  line-height: 1.1;
  font-size: clamp(30px, 7vw, 56px);
  color: var(--chalk);
}

.page-about .about-hero h1 em {
  font-style: normal;
  color: var(--red);
}

.page-about .about-hero__lead {
  margin: 0 0 26px;
  max-width: 34em;
  color: #C9D3DC;
}

.page-about .about-hero__acts {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 30px;
}

.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px 18px;
  margin: 0;
  padding-top: 20px;
  border-top: 1px solid var(--about-rule);
}

.page-about .about-hero__facts .fact {
  min-width: 0;
}

.page-about .about-hero__facts dt {
  font-size: var(--fs-label);
  letter-spacing: .12em;
  color: var(--mist);
}

.page-about .about-hero__facts dd {
  margin: 2px 0 0;
  font-family: var(--font-mono);
  font-size: 19px;
  color: var(--chalk);
}

.page-about .about-hero__board {
  display: flex;
  justify-content: center;
}

.page-about .board {
  width: 100%;
  max-width: 480px;
  height: auto;
}

.page-about .board-line {
  fill: none;
  stroke: var(--about-line);
  stroke-width: 1.4;
}

.page-about .board-panel rect,
.page-about .board-cells rect {
  fill: var(--stripe);
  stroke: var(--gold);
  stroke-width: 1.2;
}

.page-about .board-num {
  fill: var(--chalk);
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 56px;
  letter-spacing: -.02em;
  text-anchor: middle;
}

.page-about .board-lab {
  fill: var(--mist);
  font-family: var(--font-body);
  font-size: 12px;
  letter-spacing: .1em;
  text-anchor: middle;
}

.page-about .board-val {
  fill: var(--yellow);
  font-family: var(--font-mono);
  font-size: 20px;
  text-anchor: middle;
}

.page-about .board-dot-red {
  fill: var(--red);
}

.page-about .board-dot-yellow {
  fill: var(--yellow);
}

.page-about .board-note {
  fill: var(--mist);
  font-family: var(--font-mono);
  font-size: 12px;
}

/* ---------- 首屏下方宽幅图 ---------- */
.page-about .about-stadium {
  position: relative;
  margin: 0;
  background: var(--night);
}

.page-about .about-stadium img {
  display: block;
  width: 100%;
  height: clamp(180px, 34vw, 420px);
  object-fit: cover;
  filter: saturate(.75) brightness(.7);
}

.page-about .about-stadium::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 62%;
  background: linear-gradient(180deg, rgba(10, 26, 42, 0) 0%, var(--night) 92%);
  pointer-events: none;
}

/* ---------- 章节头通用 ---------- */
.page-about .section-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: clamp(14px, 3vw, 28px);
  align-items: start;
  margin-bottom: clamp(26px, 4vw, 48px);
}

.page-about .section-num {
  font-family: var(--font-index);
  font-weight: 200;
  font-size: clamp(52px, 10vw, 112px);
  line-height: .82;
  letter-spacing: -.04em;
  color: rgba(198, 161, 75, .3);
  user-select: none;
}

.page-about .section-title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-weight: 900;
  font-stretch: condensed;
  letter-spacing: -.015em;
  line-height: 1.14;
  font-size: var(--fs-section);
}

.page-about .section-lead {
  margin: 0;
  max-width: 46em;
  color: var(--mist);
}

/* ---------- 01 品牌主张 ---------- */
.page-about .about-why {
  padding: clamp(44px, 7vw, 88px) 0;
}

.page-about .about-why__grid {
  display: grid;
  gap: 18px;
}

.page-about .why-card {
  padding: clamp(20px, 3vw, 30px);
  background: linear-gradient(160deg, rgba(15, 48, 41, .92), rgba(10, 26, 42, .92));
  border: 1px solid var(--about-line);
  border-left: 3px solid var(--red);
}

.page-about .why-card .tag {
  display: inline-block;
  margin-bottom: 12px;
}

.page-about .why-card h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: var(--fs-sub);
  letter-spacing: -.01em;
  color: var(--chalk);
}

.page-about .why-card p {
  margin: 0;
  color: #C3CED8;
}

/* ---------- 纸色区块通用 ---------- */
.page-about .sheet {
  position: relative;
  z-index: 2;
  background: var(--paper);
  color: var(--about-paper-ink);
  padding: clamp(52px, 8vw, 100px) 0;
}

.page-about .sheet::before,
.page-about .sheet::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  height: 16px;
  background: var(--paper);
  pointer-events: none;
}

.page-about .sheet::before {
  top: -15px;
  clip-path: polygon(0 100%, 100% 0, 100% 100%, 0 100%);
}

.page-about .sheet::after {
  bottom: -15px;
  clip-path: polygon(0 0, 100% 0, 0 100%, 0 0);
}

.page-about .sheet .section-num {
  color: rgba(226, 58, 46, .3);
}

.page-about .sheet .section-title {
  color: var(--night);
}

.page-about .sheet .section-lead {
  color: #5A6773;
}

/* ---------- 02 四类内容关系 ---------- */
.page-about .flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
}

.page-about .flow__node {
  min-width: 0;
  padding: 20px;
  background: var(--chalk);
  border: 1px solid rgba(36, 48, 61, .18);
  box-shadow: 0 2px 0 rgba(36, 48, 61, .06), 4px 6px 0 rgba(36, 48, 61, .05);
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .flow__node:nth-child(odd) {
  transform: translateY(-6px);
}

.page-about .flow__node:nth-child(4n + 3) {
  transform: translateY(6px);
}

.page-about .flow__node .tag {
  display: inline-block;
  margin-bottom: 10px;
}

.page-about .flow__node h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 20px;
  letter-spacing: -.01em;
  color: var(--night);
}

.page-about .flow__node p {
  margin: 0;
  font-size: 15px;
  line-height: 1.68;
  color: #55626E;
}

.page-about .flow__arrow {
  position: relative;
  height: 26px;
}

.page-about .flow__arrow::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 10px;
  height: 10px;
  margin: -7px 0 0 -5px;
  border-right: 2px solid var(--red);
  border-bottom: 2px solid var(--red);
  transform: rotate(45deg);
}

.page-about .flow:has(.flow__node:hover) .flow__node:not(:hover) {
  opacity: .42;
}

.page-about .flow__note {
  margin: 30px 0 0;
  padding-left: 16px;
  border-left: 2px solid var(--gold);
  font-size: 15px;
  color: #5A6773;
}

/* ---------- 03 赛季时间轴 ---------- */
.page-about .about-timeline {
  padding: clamp(48px, 8vw, 96px) 0 clamp(56px, 9vw, 110px);
}

.page-about .era-index {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: clamp(26px, 4vw, 44px);
}

.page-about .era-index a {
  padding: 6px 12px;
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: .06em;
  color: var(--mist);
  text-decoration: none;
  border: 1px solid var(--about-line);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .era-index a:hover,
.page-about .era-index a:focus-visible {
  color: var(--yellow);
  border-color: var(--gold);
}

.page-about .track {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}

.page-about .track::before {
  content: "";
  position: absolute;
  left: calc(var(--about-rail) / 2);
  top: 12px;
  bottom: 22px;
  width: 1px;
  background: linear-gradient(180deg, var(--gold) 0%, rgba(198, 161, 75, .18) 100%);
}

.page-about .track__item {
  position: relative;
  display: grid;
  grid-template-columns: var(--about-rail) minmax(0, 1fr);
  gap: clamp(12px, 2.4vw, 26px);
  padding-bottom: clamp(26px, 4vw, 42px);
  scroll-margin-top: 96px;
}

.page-about .track__rail {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding-top: 2px;
}

.page-about .track__idx {
  font-family: var(--font-index);
  font-weight: 200;
  font-size: 26px;
  line-height: 1;
  color: var(--mist);
}

.page-about .track__dot {
  position: relative;
  z-index: 1;
  width: 11px;
  height: 11px;
  margin-top: 10px;
  border-radius: 50%;
  background: var(--red);
  box-shadow: 0 0 0 5px rgba(226, 58, 46, .16);
}

.page-about .track__body {
  min-width: 0;
  padding-bottom: 4px;
  border-bottom: 1px dashed var(--about-line);
}

.page-about .track__era {
  margin: 0 0 4px;
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: .12em;
  color: var(--yellow);
}

.page-about .track__body h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(19px, 3.4vw, 24px);
  letter-spacing: -.01em;
  color: var(--chalk);
}

.page-about .track__body p {
  margin: 0;
  max-width: 44em;
  color: #C3CED8;
}

/* ---------- 04 内容团队 ---------- */
.page-about .about-team__grid {
  display: grid;
  gap: clamp(24px, 4vw, 40px);
  margin-bottom: clamp(30px, 5vw, 52px);
}

.page-about .team-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 22px;
}

.page-about .team-list li {
  padding-left: 18px;
  border-left: 3px solid rgba(226, 58, 46, .35);
}

.page-about .team-list h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 20px;
  letter-spacing: -.01em;
  color: var(--night);
}

.page-about .team-list p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.72;
  color: #55626E;
}

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

.page-about .about-team__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border: 1px solid rgba(36, 48, 61, .2);
}

.page-about .about-team__figure figcaption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: .04em;
  color: #6B7884;
}

.page-about .steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-about .steps__item {
  position: relative;
  padding: 18px 18px 18px 20px;
  background: var(--chalk);
  border: 1px solid rgba(36, 48, 61, .16);
}

.page-about .steps__item:not(:last-child)::after {
  content: "";
  position: absolute;
  left: 28px;
  bottom: -18px;
  width: 0;
  height: 18px;
  border-left: 1px dashed rgba(198, 161, 75, .8);
}

.page-about .steps__no {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--chalk);
  background: var(--night);
}

.page-about .steps__item h4 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 18px;
  color: var(--night);
}

.page-about .steps__item p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.68;
  color: #5A6773;
}

/* ---------- 05 更新节奏 ---------- */
.page-about .about-rhythm {
  padding: clamp(48px, 8vw, 96px) 0;
}

.page-about .meters {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--about-line);
  border: 1px solid var(--about-line);
}

.page-about .meter {
  min-width: 0;
  padding: clamp(16px, 2.6vw, 26px);
  background: var(--stripe);
}

.page-about .meter__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(26px, 5vw, 42px);
  font-weight: 700;
  line-height: 1.1;
  color: var(--chalk);
  letter-spacing: -.01em;
  overflow-wrap: anywhere;
}

.page-about .meter:nth-child(2n) .meter__num {
  color: var(--yellow);
}

.page-about .meter__lab {
  display: block;
  margin-top: 6px;
  font-size: var(--fs-label);
  letter-spacing: .08em;
  color: var(--mist);
}

.page-about .about-rhythm__note {
  display: grid;
  gap: 16px;
  margin-top: clamp(24px, 4vw, 38px);
}

.page-about .about-rhythm__note p {
  margin: 0;
  padding-left: 16px;
  border-left: 2px solid var(--red);
  color: #C3CED8;
}

.page-about .about-rhythm__note strong {
  color: var(--chalk);
}

/* ---------- 06 山西运营背景 ---------- */
.page-about .about-shanxi__grid {
  display: grid;
  gap: clamp(24px, 4vw, 40px);
  align-items: center;
}

.page-about .about-shanxi__copy p {
  margin: 0 0 16px;
  max-width: 44em;
  color: #55626E;
}

.page-about .about-shanxi__acts {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.page-about .about-shanxi__figure {
  margin: 0;
  padding: 14px 0;
  border-top: 1px solid rgba(198, 161, 75, .5);
  border-bottom: 1px solid rgba(198, 161, 75, .5);
}

.page-about .about-shanxi__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 1;
  object-fit: cover;
}

/* ---------- 收尾 ---------- */
.page-about .about-cta {
  padding: clamp(48px, 8vw, 96px) 0 clamp(56px, 9vw, 104px);
}

.page-about .about-cta__panel {
  position: relative;
  padding: clamp(24px, 4vw, 46px);
  background: linear-gradient(150deg, var(--ink) 0%, var(--night) 70%);
  border: 1px solid var(--about-rule);
}

.page-about .about-cta__panel .label {
  display: inline-block;
  margin-bottom: 14px;
}

.page-about .about-cta__panel h2 {
  margin: 0 0 clamp(20px, 3vw, 32px);
  font-family: var(--font-display);
  font-weight: 900;
  font-stretch: condensed;
  letter-spacing: -.015em;
  line-height: 1.16;
  font-size: var(--fs-section);
  color: var(--chalk);
}

.page-about .about-cta__grid {
  display: grid;
  gap: 14px;
}

.page-about .about-cta__card {
  display: block;
  min-width: 0;
  padding: 20px;
  text-decoration: none;
  background: rgba(22, 35, 47, .82);
  border: 1px solid var(--about-line);
  border-top: 3px solid var(--red);
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .about-cta__card:hover,
.page-about .about-cta__card:focus-visible {
  background: rgba(15, 48, 41, .92);
  border-color: var(--gold);
  border-top-color: var(--yellow);
}

.page-about .about-cta__kicker {
  display: block;
  font-size: var(--fs-label);
  letter-spacing: .12em;
  color: var(--yellow);
}

.page-about .about-cta__card strong {
  display: block;
  margin: 8px 0 14px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 19px;
  line-height: 1.35;
  color: var(--chalk);
}

.page-about .about-cta__go {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--mist);
}

.page-about .about-cta__card:hover .about-cta__go {
  color: var(--gold);
}

/* ---------- 桌面端 ---------- */
@media (min-width: 760px) {
  .page-about .about-hero__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .page-about .why-card:nth-child(2) {
    transform: translateY(24px);
  }

  .page-about .why-card:nth-child(3) {
    transform: translateY(48px);
  }

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

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

  .page-about .steps {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 22px;
  }

  .page-about .steps__item:not(:last-child)::after {
    left: auto;
    right: -22px;
    bottom: auto;
    top: 30px;
    width: 22px;
    height: 0;
    border-left: 0;
    border-top: 1px dashed rgba(198, 161, 75, .8);
  }
}

@media (min-width: 900px) {
  .page-about {
    --about-rail: 96px;
  }

  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr);
    align-items: center;
    gap: clamp(36px, 5vw, 64px);
  }

  .page-about .about-hero h1 {
    font-size: clamp(38px, 4.6vw, 58px);
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    align-items: start;
  }

  .page-about .about-shanxi__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, .8fr);
  }

  .page-about .flow {
    grid-template-columns: minmax(0, 1fr) 30px minmax(0, 1fr) 30px minmax(0, 1fr) 30px minmax(0, 1fr);
    align-items: start;
  }

  .page-about .flow__arrow {
    height: auto;
    align-self: center;
  }

  .page-about .flow__arrow::before {
    margin: -6px 0 0 -6px;
    transform: rotate(-45deg);
  }

  .page-about .flow__node:first-child {
    transform: translateY(-18px);
  }

  .page-about .flow__node:nth-child(3) {
    transform: translateY(10px);
  }

  .page-about .flow__node:nth-child(5) {
    transform: translateY(-8px);
  }

  .page-about .flow__node:last-child {
    transform: translateY(26px);
  }

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

  .page-about .meters {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .flow__node,
  .page-about .about-cta__card {
    transition: none;
  }
}
<<<END>>>