.page-about {
  --about-rule: rgba(30, 91, 60, .40);
  --about-rule-soft: rgba(30, 91, 60, .20);
  position: relative;
  background: var(--sf-night);
  color: var(--sf-chalk);
  font-family: var(--sf-font-body);
  overflow-x: hidden;
}

.page-about .about-measure {
  max-width: 60ch;
}

.page-about .sf-section {
  padding-top: clamp(56px, 9vw, 104px);
  padding-bottom: clamp(56px, 9vw, 104px);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  padding-top: calc(var(--sf-header-h) + clamp(40px, 7vw, 80px));
  padding-bottom: clamp(44px, 7vw, 80px);
  border-bottom: 1px solid var(--about-rule);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(90deg, var(--sf-grid-line) 0 1px, transparent 1px 96px);
  pointer-events: none;
}

.page-about .about-hero > * {
  position: relative;
}

.page-about .about-hero .sf-breadcrumb {
  margin-bottom: clamp(20px, 3vw, 32px);
}

.page-about .about-hero h1 {
  margin: 0 0 clamp(16px, 2.5vw, 26px);
  max-width: 21ch;
}

.page-about .about-hero .sf-lead {
  max-width: 62ch;
  margin: 0;
}

.page-about .about-figures {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: clamp(32px, 5vw, 56px);
  background: var(--about-rule);
  border: 1px solid var(--about-rule);
}

.page-about .about-figures > div {
  display: grid;
  gap: 8px;
  align-content: start;
  padding: clamp(16px, 2.4vw, 24px);
  background: var(--sf-night);
}

.page-about .about-figures .sf-num {
  font-size: clamp(24px, 3vw, 34px);
  line-height: 1;
  color: var(--sf-glow);
}

.page-about .about-figures > div > span:last-child {
  font-size: 13px;
  line-height: 1.6;
  color: var(--sf-silver);
}

@media (min-width: 720px) {
  .page-about .about-figures {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 版本时间轴 ---------- */

.page-about .tl {
  list-style: none;
  margin: clamp(36px, 5vw, 64px) 0 0;
  padding: 0;
}

.page-about .tl__item {
  position: relative;
  padding: 0 0 36px 42px;
}

.page-about .tl__item::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 16px;
  bottom: 0;
  width: 1px;
  background: var(--sf-line);
}

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

.page-about .tl__item:last-child::before {
  bottom: auto;
  height: 40%;
}

.page-about .tl__dot {
  position: absolute;
  left: 3px;
  top: 5px;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--sf-glow);
  box-shadow: 0 0 0 4px rgba(200, 255, 77, .14);
}

.page-about .tl__head {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .tl__ver {
  font-family: var(--sf-font-mono);
  font-size: clamp(26px, 3vw, 36px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--sf-glow);
}

.page-about .tl__when {
  font-family: var(--sf-font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--sf-silver);
}

.page-about .tl__title {
  margin: 14px 0 10px;
  font-family: var(--sf-font-display);
  font-size: clamp(18px, 1.6vw, 21px);
  font-weight: 700;
  letter-spacing: .01em;
  color: var(--sf-chalk);
}

.page-about .tl__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--sf-silver);
}

.page-about .tl__stat {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px dashed var(--about-rule-soft);
}

.page-about .tl__stat b {
  font-family: var(--sf-font-mono);
  font-size: clamp(24px, 2.4vw, 32px);
  font-weight: 700;
  line-height: 1;
  color: var(--sf-amber);
}

.page-about .tl__stat span {
  font-size: 12px;
  color: var(--sf-silver);
}

.page-about .tl__more {
  margin-top: 16px;
}

.page-about .tl__more summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 0 0;
  border-top: 1px solid var(--about-rule);
  font-size: 13px;
  color: var(--sf-silver);
  cursor: pointer;
  list-style: none;
}

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

.page-about .tl__more summary::after {
  content: "+";
  font-family: var(--sf-font-mono);
  font-size: 16px;
  color: var(--sf-glow);
}

.page-about .tl__more[open] summary::after {
  content: "\2212";
}

.page-about .tl__more ul {
  margin: 12px 0 0;
  padding-left: 1.15em;
  font-size: 14px;
  line-height: 1.75;
  color: var(--sf-silver);
}

.page-about .tl__more li + li {
  margin-top: 6px;
}

.page-about .tl__tip {
  display: none;
}

@media (min-width: 900px) {
  .page-about .tl {
    display: grid;
    grid-template-columns: 1.15fr .85fr 1fr .95fr;
  }

  .page-about .tl__item {
    padding: 112px clamp(14px, 1.8vw, 26px) 0 0;
  }

  .page-about .tl__item::before {
    left: 0;
    right: 0;
    top: 60px;
    bottom: auto;
    width: auto;
    height: 1px;
    background: var(--sf-line);
  }

  .page-about .tl__item:last-child::before {
    height: 1px;
    right: 42%;
  }

  .page-about .tl__dot {
    left: 0;
    top: 53px;
  }

  .page-about .tl__tip {
    display: block;
    position: absolute;
    top: 8px;
    left: 0;
    max-width: 250px;
    padding: 9px 12px;
    border: 1px solid var(--about-rule);
    border-radius: var(--sf-radius);
    background: var(--sf-pitch);
    font-size: 12px;
    line-height: 1.6;
    color: var(--sf-chalk);
    opacity: 0;
    visibility: hidden;
    transform: translateY(6px);
    transition: opacity .18s ease, transform .18s ease, visibility .18s;
    pointer-events: none;
    z-index: 6;
  }

  .page-about .tl__tip b {
    font-family: var(--sf-font-mono);
    color: var(--sf-amber);
    margin-right: 4px;
  }

  .page-about .tl__item:hover .tl__tip,
  .page-about .tl__item:focus-within .tl__tip {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }
}

/* ---------- 中段图片带 ---------- */

.page-about .about-break {
  margin: 0;
  border-top: 1px solid var(--about-rule);
  border-bottom: 1px solid var(--about-rule);
  background: var(--sf-deep);
}

.page-about .about-break .sf-container {
  padding-top: clamp(24px, 4vw, 48px);
  padding-bottom: clamp(24px, 4vw, 48px);
}

/* ---------- 团队 ---------- */

.page-about .about-team__grid {
  display: grid;
  gap: clamp(28px, 4vw, 48px);
  align-items: start;
}

.page-about .about-team__copy {
  border-left: 1px solid var(--about-rule);
  padding-left: clamp(18px, 2.4vw, 28px);
}

.page-about .about-team__copy h2 {
  margin: 12px 0 18px;
}

.page-about .about-team__copy .sf-prose + .sf-prose {
  margin-top: 14px;
}

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

@media (min-width: 900px) {
  .page-about .about-team__grid {
    grid-template-columns: 1.05fr 1fr;
  }
}

.page-about .shift {
  list-style: none;
  display: grid;
  gap: 1px;
  margin: clamp(36px, 5vw, 56px) 0 0;
  padding: 0;
  background: var(--about-rule);
  border: 1px solid var(--about-rule);
}

.page-about .shift__item {
  display: grid;
  gap: 8px;
  padding: clamp(18px, 2.2vw, 26px);
  background: var(--sf-deep);
  border-top: 3px solid var(--sf-line);
}

.page-about .shift__item--b {
  border-top-color: var(--sf-amber);
  background: linear-gradient(180deg, rgba(255, 122, 24, .12), rgba(11, 35, 24, 0));
}

.page-about .shift__item--c {
  border-top-color: var(--sf-trend);
}

.page-about .shift__time {
  font-family: var(--sf-font-mono);
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--sf-glow);
}

.page-about .shift__name {
  font-family: var(--sf-font-display);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: .02em;
}

.page-about .shift__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--sf-silver);
}

@media (min-width: 820px) {
  .page-about .shift {
    grid-template-columns: 1fr 1.05fr 1fr;
  }
}

/* ---------- 联赛版图 ---------- */

.page-about .about-leagues__grid {
  display: grid;
  gap: clamp(24px, 3.5vw, 40px);
  margin-top: clamp(32px, 5vw, 56px);
}

.page-about .league-group h3 {
  margin: 0 0 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--about-rule);
  font-family: var(--sf-font-display);
  font-size: 19px;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--sf-chalk);
}

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

.page-about .league-list li {
  display: grid;
  grid-template-columns: minmax(62px, 84px) 1fr;
  gap: 14px;
  padding: 11px 0;
  border-bottom: 1px dashed var(--about-rule-soft);
  font-size: 14px;
  line-height: 1.65;
}

.page-about .league-list__name {
  font-family: var(--sf-font-display);
  font-size: 15px;
  font-weight: 700;
  color: var(--sf-glow);
}

.page-about .league-list__note {
  color: var(--sf-silver);
}

@media (min-width: 860px) {
  .page-about .about-leagues__grid {
    grid-template-columns: 1fr 1fr;
  }
}

.page-about .league-chart {
  margin: clamp(36px, 5vw, 56px) 0 0;
  padding: clamp(18px, 2.6vw, 28px);
  border: 1px solid var(--about-rule);
  background: var(--sf-deep);
}

.page-about .league-chart svg {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .league-chart figcaption {
  margin-top: 12px;
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--sf-silver);
}

.page-about .chart-axis {
  stroke: var(--sf-line);
  stroke-width: 1;
}

.page-about .chart-grid {
  stroke: rgba(30, 91, 60, .32);
  stroke-width: 1;
  stroke-dasharray: 3 7;
}

.page-about .chart-line {
  fill: none;
  stroke: var(--sf-glow);
  stroke-width: 2.5;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.page-about .chart-dot {
  fill: var(--sf-night);
  stroke: var(--sf-glow);
  stroke-width: 2;
}

.page-about .chart-dot--end {
  fill: var(--sf-glow);
}

.page-about .chart-label {
  font-family: var(--sf-font-mono);
  font-size: 13px;
  fill: var(--sf-silver);
}

.page-about .chart-label--now {
  fill: var(--sf-chalk);
}

/* ---------- 专题系列 ---------- */

.page-about .series {
  list-style: none;
  display: grid;
  gap: 1px;
  margin: clamp(32px, 5vw, 56px) 0 0;
  padding: 0;
  background: var(--about-rule-soft);
}

.page-about .series__item {
  padding: clamp(22px, 2.6vw, 32px);
  background: var(--sf-deep);
}

.page-about .series__item:nth-child(2) {
  background: var(--sf-pitch);
}

.page-about .series__idx {
  display: block;
  margin-bottom: 14px;
  font-family: var(--sf-font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--sf-amber);
}

.page-about .series__item h3 {
  margin: 0 0 12px;
  font-family: var(--sf-font-display);
  font-size: clamp(20px, 2vw, 24px);
  font-weight: 700;
  color: var(--sf-chalk);
}

.page-about .series__item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--sf-silver);
}

@media (min-width: 820px) {
  .page-about .series {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- 合作生态 ---------- */

.page-about .about-partners__grid {
  display: grid;
  gap: clamp(28px, 4vw, 48px);
  align-items: center;
}

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

.page-about .about-partners__copy h2 {
  margin: 12px 0 18px;
}

.page-about .about-partners__copy .sf-prose + .sf-prose {
  margin-top: 14px;
}

@media (min-width: 900px) {
  .page-about .about-partners__grid {
    grid-template-columns: 1fr 1.1fr;
  }
}

/* ---------- 阶段成果 ---------- */

.page-about .honours {
  display: grid;
  gap: clamp(24px, 3.5vw, 40px);
  margin-top: clamp(28px, 4vw, 48px);
}

.page-about .honours__cases .sf-prose + .sf-prose {
  margin-top: 14px;
}

.page-about .honours__list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--about-rule);
}

.page-about .honours__list li {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 0;
  border-bottom: 1px dashed var(--about-rule-soft);
}

.page-about .honours__key {
  font-size: 15px;
  color: var(--sf-chalk);
}

.page-about .honours__val {
  font-family: var(--sf-font-mono);
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--sf-glow);
  white-space: nowrap;
}

@media (min-width: 860px) {
  .page-about .honours {
    grid-template-columns: 1.2fr 1fr;
  }
}

/* ---------- 接下来的赛季 ---------- */

.page-about .next-list {
  list-style: none;
  display: grid;
  gap: 1px;
  margin: clamp(28px, 4vw, 44px) 0 0;
  padding: 0;
  background: var(--about-rule-soft);
}

.page-about .next-list li {
  padding: clamp(20px, 2.4vw, 28px);
  background: var(--sf-night);
  border-top: 2px solid var(--sf-glow);
}

.page-about .next-list__idx {
  display: block;
  margin-bottom: 12px;
  font-family: var(--sf-font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--sf-silver);
}

.page-about .next-list h3 {
  margin: 0 0 10px;
  font-family: var(--sf-font-display);
  font-size: 20px;
  font-weight: 700;
  color: var(--sf-chalk);
}

.page-about .next-list p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--sf-silver);
}

@media (min-width: 820px) {
  .page-about .next-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-about .about-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(32px, 5vw, 48px);
}

/* ---------- 动效降级 ---------- */

@media (prefers-reduced-motion: reduce) {
  .page-about .tl__tip,
  .page-about .tl__dot {
    transition: none;
  }
}
</final_marker>