.page-about {
  --about-cut: 13px;
  --about-gap: clamp(20px, 4vw, 48px);
  padding-bottom: clamp(48px, 9vw, 104px);
}

.page-about .breadcrumb {
  padding-top: clamp(16px, 3vw, 26px);
}

/* ---------- 首屏 ---------- */
.page-about .about-intro {
  padding-top: clamp(20px, 4vw, 40px);
  padding-bottom: clamp(24px, 5vw, 52px);
}

.page-about .about-intro__grid {
  display: grid;
  gap: clamp(20px, 4vw, 36px);
}

@media (min-width: 900px) {
  .page-about .about-intro__grid {
    grid-template-columns: 200px minmax(0, 1fr);
    gap: clamp(32px, 5vw, 76px);
    align-items: start;
  }
}

.page-about .about-intro__aside {
  border-top: 1px solid var(--line-strong);
  padding-top: 14px;
}

.page-about .about-intro__since {
  font-family: var(--font-mono);
  font-size: clamp(30px, 6vw, 46px);
  line-height: 1;
  color: var(--c-lime);
  margin: 12px 0 8px;
  letter-spacing: -0.02em;
}

.page-about .about-intro__since-label {
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--ink-soft);
  margin: 0;
}

.page-about .about-intro__title {
  font-size: clamp(34px, 8.4vw, 74px);
  line-height: 1.06;
  letter-spacing: -0.025em;
  font-weight: 300;
  margin: 0 0 20px;
}

.page-about .about-intro__lead {
  max-width: 62ch;
  margin: 0;
}

.page-about .about-intro__facts {
  list-style: none;
  margin: clamp(26px, 5vw, 40px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

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

.page-about .about-intro__facts li {
  background: var(--c-pitch);
  padding: 18px 16px 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.page-about .about-intro__factnum {
  font-family: var(--font-mono);
  font-size: clamp(22px, 3.4vw, 30px);
  line-height: 1;
  color: var(--c-lime);
  letter-spacing: -0.02em;
}

.page-about .about-intro__facts em {
  font-style: normal;
  font-size: 12px;
  line-height: 1.5;
  letter-spacing: 0.05em;
  color: var(--ink-soft);
}

/* ---------- 主题带局部微调 ---------- */
.page-about .band {
  margin-bottom: clamp(20px, 4vw, 34px);
}

.page-about .band__index {
  color: var(--c-lime);
}

.page-about .band--accent .band__index {
  color: var(--c-amber);
}

/* ---------- 左窄右宽分栏 ---------- */
.page-about .about-split {
  display: grid;
  gap: clamp(24px, 4vw, 40px);
}

@media (min-width: 960px) {
  .page-about .about-split {
    grid-template-columns: 168px minmax(0, 1fr);
    gap: clamp(36px, 5vw, 80px);
  }
}

.page-about .about-yindex {
  align-self: start;
}

@media (min-width: 960px) {
  .page-about .about-yindex {
    position: sticky;
    top: calc(var(--bar-h) + 28px);
  }
}

.page-about .about-yindex__cap {
  margin: 0 0 10px;
}

.page-about .yindex__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

.page-about .yindex__list::-webkit-scrollbar {
  display: none;
}

@media (min-width: 960px) {
  .page-about .yindex__list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    border-left: 1px solid var(--line);
  }
}

.page-about .yindex__link {
  display: block;
  white-space: nowrap;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--ink-soft);
  text-decoration: none;
  padding: 7px 12px;
  border: 1px solid var(--line);
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease), background-color 0.18s var(--ease);
}

@media (min-width: 960px) {
  .page-about .yindex__link {
    border: 0;
    border-left: 2px solid transparent;
    margin-left: -1px;
    padding: 8px 0 8px 14px;
  }
}

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

@media (min-width: 960px) {
  .page-about .yindex__link:hover,
  .page-about .yindex__link:focus-visible {
    border-color: transparent;
    border-left-color: var(--c-cyan);
  }
}

/* ---------- 导语段 ---------- */
.page-about .about-lede {
  font-size: 16px;
  line-height: 1.78;
  color: var(--ink-dim);
  margin: 0 0 clamp(26px, 4vw, 40px);
  max-width: 66ch;
}

.page-about .about-lede--wide {
  max-width: 78ch;
  margin-bottom: clamp(22px, 3.6vw, 34px);
}

/* ---------- 纵向时间线 ---------- */
.page-about .vtl {
  list-style: none;
  margin: 0;
  padding: 0 0 0 30px;
  position: relative;
}

.page-about .vtl::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 8px;
  bottom: 18px;
  width: 2px;
  background: linear-gradient(180deg, var(--c-green) 0%, rgba(31, 107, 79, 0.35) 62%, rgba(31, 107, 79, 0) 100%);
}

.page-about .vtl__item {
  position: relative;
  padding-bottom: clamp(26px, 4vw, 42px);
}

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

.page-about .vtl__item::before {
  content: "";
  position: absolute;
  left: -30px;
  top: 5px;
  width: 16px;
  height: 16px;
  background: var(--c-green);
  clip-path: polygon(0 0, 62% 0, 100% 38%, 100% 100%, 38% 100%, 0 62%);
}

.page-about .vtl__item--hot::before {
  background: var(--c-lime);
}

.page-about .vtl__time {
  margin: 0 0 8px;
  color: var(--ink-soft);
}

.page-about .vtl__title {
  margin: 0 0 8px;
  font-size: clamp(18px, 2.3vw, 22px);
  line-height: 1.35;
  font-weight: 500;
}

.page-about .vtl__text {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--ink-dim);
  max-width: 62ch;
}

.page-about .vtl__figure {
  list-style: none;
  padding-bottom: clamp(26px, 4vw, 42px);
}

.page-about .vtl__figure .about-media {
  max-width: 640px;
}

/* ---------- 图片容器 ---------- */
.page-about .about-media {
  margin: 0;
  position: relative;
  background: var(--c-stand);
  clip-path: polygon(0 0, calc(100% - var(--about-cut)) 0, 100% var(--about-cut), 100% 100%, var(--about-cut) 100%, 0 calc(100% - var(--about-cut)));
}

.page-about .about-media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: 3 / 2;
  filter: saturate(0.92) brightness(0.86);
}

.page-about .about-media--inline img {
  aspect-ratio: 3 / 2;
}

.page-about .about-media--wide img {
  aspect-ratio: 16 / 10;
}

.page-about .about-media .media-frame__caption {
  padding: 12px 16px 14px;
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--ink-soft);
  background: var(--c-pitch-2);
  margin: 0;
}

.page-about .about-media--wide {
  margin-bottom: clamp(28px, 5vw, 46px);
}

/* ---------- 分段切换与主线面板 ---------- */
.page-about .about-lines {
  position: relative;
  margin-top: clamp(6px, 1.6vw, 14px);
}

.page-about .about-lines .segmented__list {
  display: flex;
  gap: 4px;
  overflow-x: auto;
  scrollbar-width: none;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

.page-about .about-lines .segmented__list::-webkit-scrollbar {
  display: none;
}

.page-about .about-lines .segmented__btn {
  flex: 0 0 auto;
  white-space: nowrap;
  font-size: 13px;
  letter-spacing: 0.06em;
  padding: 10px 16px;
  background: transparent;
  color: var(--ink-soft);
  border: 1px solid var(--line);
  border-radius: 0;
  cursor: pointer;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-about .about-lines .segmented__btn:hover,
.page-about .about-lines .segmented__btn:focus-visible {
  color: var(--ink);
  border-color: var(--line-strong);
}

.page-about .about-lines .segmented__btn[aria-selected="true"] {
  color: var(--c-pitch);
  background: var(--c-lime);
  border-color: var(--c-lime);
}

.page-about .about-lines .segmented__indicator {
  display: block;
  height: 2px;
  width: 42px;
  background: var(--c-lime);
  margin-top: -1px;
}

.page-about .line-panel {
  padding-top: clamp(20px, 3.4vw, 32px);
}

.page-about .line-panel[hidden] {
  display: none;
}

.page-about .line-panel__kicker {
  margin: 0 0 12px;
}

.page-about .line-panel__kicker--transit {
  color: var(--c-orange);
}

.page-about .line-panel__lead {
  font-size: clamp(16px, 2.1vw, 19px);
  line-height: 1.72;
  color: var(--ink);
  margin: 0 0 18px;
  max-width: 66ch;
}

.page-about .line-panel__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
  max-width: 78ch;
}

.page-about .line-panel__list li {
  position: relative;
  padding-left: 20px;
  font-size: 15px;
  line-height: 1.72;
  color: var(--ink-dim);
}

.page-about .line-panel__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 9px;
  height: 2px;
  background: var(--c-cyan);
}

/* ---------- 团队与环形图 ---------- */
.page-about .about-roles {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
}

@media (min-width: 860px) {
  .page-about .about-roles {
    grid-template-columns: 240px minmax(0, 1fr);
    align-items: center;
    gap: clamp(32px, 5vw, 72px);
  }
}

.page-about .about-ring {
  position: relative;
  width: min(240px, 62vw);
  margin: 0 auto;
}

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

.page-about .about-ring__center {
  position: absolute;
  inset: 0;
  margin: 0;
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 4px;
}

.page-about .about-ring__num {
  font-family: var(--font-mono);
  font-size: 38px;
  line-height: 1;
  color: var(--c-mist);
  letter-spacing: -0.02em;
}

.page-about .about-ring__center em {
  font-style: normal;
  font-size: 12px;
  color: var(--ink-soft);
}

.page-about .about-roles__list {
  margin: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .role-item {
  background: var(--c-pitch-2);
  padding: 18px 18px 20px;
}

.page-about .role-item__key {
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: 14px;
  letter-spacing: 0.04em;
  color: var(--c-mist);
  margin-bottom: 8px;
}

.page-about .role-item__dot {
  width: 9px;
  height: 9px;
  flex: 0 0 auto;
  transform: rotate(45deg);
  background: var(--c-grey);
}

.page-about .role-item--transit .role-item__dot {
  background: var(--c-orange);
}

.page-about .role-item--live .role-item__dot {
  background: var(--c-cyan);
}

.page-about .role-item--data .role-item__dot {
  background: var(--c-lime);
}

.page-about .role-item__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--ink-dim);
  max-width: 70ch;
}

/* ---------- 确认流程 ---------- */
.page-about .flow-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  counter-reset: flow;
}

@media (min-width: 700px) {
  .page-about .flow-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1080px) {
  .page-about .flow-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-about .flow-step {
  background: var(--c-night);
  padding: 22px 20px 26px;
  position: relative;
}

.page-about .flow-step__num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--c-cyan);
  margin: 0 0 14px;
}

.page-about .flow-step__title {
  margin: 0 0 10px;
  font-size: 17px;
  line-height: 1.4;
  font-weight: 500;
}

.page-about .flow-step__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.74;
  color: var(--ink-dim);
}

/* ---------- 终场核对 ---------- */
.page-about .about-final {
  display: grid;
  gap: 26px;
  padding: clamp(24px, 4.4vw, 46px);
  background: linear-gradient(120deg, rgba(184, 255, 60, 0.09) 0%, rgba(53, 224, 200, 0.06) 46%, rgba(7, 19, 15, 0) 100%), var(--c-pitch-2);
  border: 1px solid var(--line-strong);
  clip-path: polygon(0 0, calc(100% - var(--about-cut)) 0, 100% var(--about-cut), 100% 100%, var(--about-cut) 100%, 0 calc(100% - var(--about-cut)));
}

@media (min-width: 880px) {
  .page-about .about-final {
    grid-template-columns: minmax(0, 1fr) 200px;
    align-items: center;
    gap: clamp(32px, 5vw, 64px);
  }
}

.page-about .about-final__title {
  margin: 10px 0 16px;
  font-size: clamp(22px, 3.4vw, 32px);
  line-height: 1.28;
}

.page-about .about-final__text {
  margin: 0 0 12px;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--ink-dim);
  max-width: 64ch;
}

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

.page-about .about-final__stat {
  border-left: 2px solid var(--c-lime);
  padding-left: 18px;
}

.page-about .about-final__statnum {
  margin: 0;
  font-family: var(--font-mono);
  color: var(--c-lime);
  line-height: 1;
  display: flex;
  align-items: baseline;
  gap: 5px;
}

.page-about .about-final__statnum-v {
  font-size: clamp(40px, 7vw, 58px);
  letter-spacing: -0.03em;
}

.page-about .about-final__statnum-u {
  font-size: 14px;
  color: var(--ink-dim);
}

.page-about .about-final__statlabel {
  margin: 10px 0 0;
}

/* ---------- 覆盖与访问支持 ---------- */
.page-about .coverage-grid {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
}

@media (min-width: 960px) {
  .page-about .coverage-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    align-items: start;
    gap: clamp(36px, 5vw, 72px);
  }
}

.page-about .coverage-grid__figure {
  margin: 0;
}

.page-about .coverage-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .coverage-list li {
  background: var(--c-pitch);
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 14px 16px;
}

.page-about .coverage-list__num {
  font-family: var(--font-mono);
  font-size: clamp(20px, 2.6vw, 26px);
  line-height: 1;
  color: var(--c-cyan);
  flex: 0 0 auto;
  min-width: 4.6em;
  letter-spacing: -0.02em;
}

.page-about .coverage-list__label {
  font-size: 14px;
  line-height: 1.65;
  color: var(--ink-dim);
}

/* ---------- 合作折叠 ---------- */
.page-about .coop-details {
  display: grid;
  gap: 1px;
  background: var(--line);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .coop-details__item {
  background: var(--c-pitch-2);
}

.page-about .coop-details__summary {
  cursor: pointer;
  padding: 18px 18px 18px 20px;
  font-size: 15.5px;
  letter-spacing: 0.03em;
  color: var(--c-mist);
  display: flex;
  align-items: center;
  gap: 10px;
  list-style: none;
  transition: color 0.18s var(--ease), background-color 0.18s var(--ease);
}

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

.page-about .coop-details__summary::before {
  content: "";
  width: 9px;
  height: 9px;
  flex: 0 0 auto;
  transform: rotate(45deg);
  border: 1px solid var(--c-orange);
  transition: background-color 0.18s var(--ease);
}

.page-about .coop-details__item[open] .coop-details__summary::before {
  background: var(--c-orange);
}

.page-about .coop-details__summary:hover,
.page-about .coop-details__summary:focus-visible {
  color: var(--c-cyan);
  background: rgba(53, 224, 200, 0.05);
}

.page-about .coop-details__body {
  padding: 0 20px 22px 39px;
}

.page-about .coop-details__body p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--ink-dim);
  max-width: 70ch;
}

/* ---------- 接下来的赛季 ---------- */
.page-about .next-list {
  list-style: none;
  margin: 0 0 clamp(30px, 5vw, 52px);
  padding: 0;
  display: grid;
  gap: clamp(18px, 3vw, 28px);
}

@media (min-width: 800px) {
  .page-about .next-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1px;
    background: var(--line);
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
  }
}

.page-about .next-item {
  padding-top: 18px;
  border-top: 2px solid var(--c-green);
}

@media (min-width: 800px) {
  .page-about .next-item {
    border-top: 0;
    background: var(--c-pitch-2);
    padding: 22px 20px 26px;
  }
}

.page-about .next-item__title {
  margin: 0 0 10px;
  font-size: 17px;
  line-height: 1.42;
  font-weight: 500;
}

.page-about .next-item__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.76;
  color: var(--ink-dim);
}

/* ---------- 底部引导 ---------- */
.page-about .about-cta {
  padding-top: clamp(22px, 3.6vw, 34px);
  border-top: 1px solid var(--line);
}

.page-about .about-cta__text {
  margin: 0 0 18px;
  font-size: 16px;
  line-height: 1.72;
  color: var(--ink);
  max-width: 56ch;
}

.page-about .about-cta__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 减弱动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .yindex__link,
  .page-about .about-lines .segmented__btn,
  .page-about .coop-details__summary {
    transition: none;
  }
}
<<<END>>>