.page-about {
  --ab-idx-w: 152px;
  --ab-plate: linear-gradient(145deg, #24322d 0%, #0b1a16 38%, #3a4842 58%, #0a1714 100%);
  background: var(--ink);
  color: var(--text);
  padding-bottom: calc(var(--dock-h) + 40px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: calc(var(--strip-h) + var(--mob-header-h) + 20px) 0 0;
  background:
    radial-gradient(120% 90% at 88% -12%, rgba(20, 230, 198, 0.14), transparent 62%),
    linear-gradient(180deg, rgba(16, 49, 39, 0.55), rgba(5, 19, 15, 0) 72%);
}

.page-about .about-hero__inner {
  display: grid;
  gap: 24px;
  margin-top: 18px;
}

.page-about .about-hero h1 {
  font-family: var(--font-narrow);
  font-size: clamp(28px, 7vw, 52px);
  line-height: 1.14;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 0.35em 0 0.5em;
  max-width: 22ch;
}

.page-about .about-hero .lede {
  color: #cfe3dc;
  font-size: 15.5px;
  line-height: 1.8;
  margin: 0;
  max-width: 56ch;
}

.page-about .about-hero .eyebrow {
  color: var(--orange);
}

.page-about .about-hero__acts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.page-about .about-hero__plate {
  position: relative;
  padding: 20px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--ab-plate);
  box-shadow: inset 0 1px 0 rgba(243, 237, 225, 0.16), 0 20px 44px -26px #000;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
}

.page-about .about-hero__tag {
  display: inline-block;
  font-size: 10.5px;
  letter-spacing: 0.16em;
  color: var(--silver);
  padding: 5px 10px;
  border: 1px solid var(--line-strong);
  border-radius: 4px;
  background: rgba(5, 19, 15, 0.45);
}

.page-about .about-hero__year {
  font-family: var(--font-mono);
  font-size: clamp(58px, 17vw, 100px);
  line-height: 0.9;
  letter-spacing: -0.05em;
  color: var(--cyan-mist);
  text-shadow: 0 0 20px rgba(20, 230, 198, 0.45);
  margin: 10px 0 6px;
}

.page-about .about-hero__plate-copy {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: #cfe3dc;
}

.page-about .about-hero__facts {
  list-style: none;
  margin: 16px 0 0;
  padding: 14px 0 0;
  border-top: 1px solid var(--line);
  display: grid;
  gap: 8px;
  font-size: 13px;
  color: var(--muted);
}

.page-about .about-hero__facts .mono {
  color: var(--cyan);
  margin-right: 8px;
  font-size: 14px;
}

/* ---------- 数据带 ---------- */
.page-about .about-band {
  margin-top: 26px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line);
  border-radius: 10px;
  overflow: hidden;
}

.page-about .about-band__cell {
  background: #061712;
  padding: 16px 14px;
}

.page-about .about-band__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(24px, 6.4vw, 34px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--cyan);
  text-shadow: 0 0 14px rgba(20, 230, 198, 0.28);
}

.page-about .about-band__cap {
  display: block;
  margin-top: 8px;
  font-size: 12px;
  line-height: 1.55;
  letter-spacing: 0.02em;
  color: var(--muted);
}

/* ---------- 主体两栏 ---------- */
.page-about .about-body {
  padding-top: 40px;
}

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

.page-about .about-index__label {
  font-size: 10px;
  letter-spacing: 0.24em;
  color: var(--silver);
}

.page-about .about-index__list {
  list-style: none;
  margin: 12px 0 0;
  padding: 0 0 0 14px;
  position: relative;
}

.page-about .about-index__list::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  bottom: 6px;
  width: 1px;
  background: linear-gradient(180deg, var(--cyan), rgba(198, 210, 206, 0.12));
}

.page-about .about-index__list a {
  display: flex;
  gap: 10px;
  align-items: baseline;
  padding: 7px 0;
  color: var(--muted);
  text-decoration: none;
  font-size: 13px;
  letter-spacing: 0.02em;
  transition: color var(--dur) var(--ease);
}

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

.page-about .about-index__list .mono {
  font-size: 11px;
  color: var(--orange);
}

/* ---------- 章节 ---------- */
.page-about .about-sec {
  padding: 40px 0;
  border-top: 1px solid var(--line-soft);
  scroll-margin-top: calc(var(--strip-h) + 16px);
}

.page-about .about-sec:first-child {
  border-top: 0;
  padding-top: 8px;
}

.page-about .about-sec__head {
  max-width: 62ch;
  margin-bottom: 18px;
}

.page-about .about-sec__head .eyebrow {
  color: var(--orange);
  font-size: 11px;
  letter-spacing: 0.2em;
}

.page-about .about-sec__title {
  font-family: var(--font-narrow);
  font-size: clamp(22px, 4.8vw, 34px);
  line-height: 1.24;
  font-weight: 800;
  letter-spacing: -0.01em;
  margin: 8px 0 10px;
}

.page-about .about-sec__lede {
  margin: 0;
  color: var(--muted);
  font-size: 14.5px;
  line-height: 1.75;
}

.page-about .about-sec p {
  font-size: 15px;
  line-height: 1.8;
  color: #cde0d9;
  margin: 0 0 0.9em;
}

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

/* ---------- 图片 ---------- */
.page-about .figure-frame {
  margin: 0 0 22px;
}

.page-about .figure-frame__media {
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow: hidden;
  background: var(--panel);
}

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

.page-about .figure-frame__cap {
  margin-top: 8px;
  font-size: 12px;
  letter-spacing: 0.02em;
  color: var(--muted);
}

/* ---------- 团队 ---------- */
.page-about .team__seg {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 18px;
}

.page-about .team__seg .seg__btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--muted);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 999px;
  cursor: pointer;
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease),
    border-color var(--dur) var(--ease);
}

.page-about .team__seg .seg__btn .mono {
  font-size: 11px;
  opacity: 0.8;
}

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

.page-about .team__seg .seg__btn[aria-selected="true"] {
  color: #04140f;
  background: var(--cyan);
  border-color: var(--cyan);
}

.page-about .team__seg .seg__btn[aria-selected="true"] .mono {
  opacity: 0.75;
}

.page-about .duty {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .duty li {
  position: relative;
  padding: 12px 14px 12px 34px;
  border: 1px solid var(--line-soft);
  border-radius: 10px;
  background: rgba(16, 49, 39, 0.5);
  font-size: 14.5px;
  line-height: 1.72;
  color: #cfe3dc;
}

.page-about .duty li::before {
  content: "";
  position: absolute;
  left: 14px;
  top: 19px;
  width: 7px;
  height: 7px;
  border: 1px solid var(--cyan);
  transform: rotate(45deg);
}

/* ---------- 版本时间线 ---------- */
.page-about .ver {
  display: grid;
  gap: 22px;
}

.page-about .ver__track {
  position: relative;
  display: grid;
  gap: 8px;
  padding-left: 22px;
}

.page-about .ver__track::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 12px;
  bottom: 12px;
  width: 1px;
  background: linear-gradient(180deg, var(--cyan), rgba(198, 210, 206, 0.15));
}

.page-about .ver__node {
  position: relative;
  display: grid;
  gap: 3px;
  text-align: left;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--panel);
  color: var(--muted);
  font-family: inherit;
  cursor: pointer;
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease),
    box-shadow var(--dur) var(--ease);
}

.page-about .ver__node::before {
  content: "";
  position: absolute;
  left: -20px;
  top: 50%;
  margin-top: -5px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--ink);
  border: 1px solid var(--line-strong);
}

.page-about .ver__node .ver__v {
  font-family: var(--font-mono);
  font-size: 15px;
  letter-spacing: 0.02em;
  color: var(--silver);
}

.page-about .ver__node .ver__name {
  font-size: 13px;
  letter-spacing: 0.02em;
}

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

.page-about .ver__node[aria-selected="true"] {
  border-color: rgba(20, 230, 198, 0.55);
  background: var(--panel-2);
  box-shadow: 0 0 0 1px rgba(20, 230, 198, 0.16), 0 14px 34px -24px var(--cyan);
}

.page-about .ver__node[aria-selected="true"] .ver__v {
  color: var(--cyan-mist);
  text-shadow: 0 0 12px rgba(20, 230, 198, 0.45);
}

.page-about .ver__node[aria-selected="true"]::before {
  background: var(--cyan);
  border-color: var(--cyan);
  box-shadow: 0 0 12px rgba(20, 230, 198, 0.7);
}

.page-about .ver__panel {
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-left: 2px solid var(--cyan);
  border-radius: 0 12px 12px 0;
  background: linear-gradient(120deg, rgba(16, 49, 39, 0.9), rgba(10, 33, 24, 0.55));
}

.page-about .ver__panel-title {
  font-size: 17px;
  font-weight: 800;
  line-height: 1.4;
  letter-spacing: -0.01em;
  margin: 0 0 8px;
  color: var(--text);
}

.page-about .ver__panel p {
  font-size: 14.5px;
  line-height: 1.78;
  color: #c6dbd4;
  margin: 0;
}

.page-about .ver__plate {
  margin: 24px 0 0;
}

.page-about .ver__next {
  margin: 18px 0 0;
  padding: 14px 16px;
  border: 1px dashed rgba(255, 106, 43, 0.42);
  border-radius: 10px;
  font-size: 14px;
  line-height: 1.75;
  color: #d7e6e0;
}

.page-about .ver__next .mono {
  color: var(--orange);
  margin-right: 8px;
  font-size: 13px;
  letter-spacing: 0.06em;
}

/* ---------- 数据流程 ---------- */
.page-about .flow__fig {
  margin-bottom: 18px;
}

.page-about .flow-panel {
  padding: 10px;
  border-radius: 14px;
}

.page-about .flow {
  display: grid;
  gap: 1px;
  background: rgba(10, 33, 24, 0.2);
  border-radius: 10px;
  overflow: hidden;
}

.page-about .flow__step {
  background: var(--paper);
  padding: 18px 18px 20px;
}

.page-about .flow__idx {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: #0a7f6d;
}

.page-about .flow__name {
  font-size: 17px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: #06231b;
  margin: 6px 0 8px;
}

.page-about .flow__text {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.78;
  color: #2c4038;
}

/* ---------- 赛事覆盖 ---------- */
.page-about .cov {
  display: grid;
  gap: 12px;
}

.page-about .cov__card {
  position: relative;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: linear-gradient(180deg, rgba(16, 49, 39, 0.85), rgba(10, 33, 24, 0.7));
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%);
}

.page-about .cov__card::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 34px;
  height: 2px;
  background: var(--orange);
}

.page-about .cov__cn {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.2em;
  color: var(--silver);
}

.page-about .cov__name {
  font-size: 18px;
  font-weight: 800;
  letter-spacing: -0.01em;
  margin: 10px 0 8px;
  color: var(--text);
}

.page-about .cov__desc {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--muted);
}

.page-about .cov__notes {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .cov__notes li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.75;
  color: #c6dbd4;
}

.page-about .cov__notes li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 8px;
  height: 1px;
  background: var(--cyan);
}

/* ---------- 里程碑 ---------- */
.page-about .mile {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .mile__item {
  display: grid;
  grid-template-columns: 62px minmax(0, 1fr);
  gap: 14px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .mile__mark {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--orange);
  padding-top: 4px;
}

.page-about .mile__title {
  margin: 0 0 5px;
  font-size: 15.5px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--text);
}

.page-about .mile__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--muted);
}

/* ---------- 继续了解 ---------- */
.page-about .about-cta {
  padding: 22px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background:
    radial-gradient(120% 150% at 100% 0%, rgba(255, 106, 43, 0.16), transparent 56%),
    var(--panel);
}

.page-about .about-cta .eyebrow {
  color: var(--orange);
  font-size: 11px;
  letter-spacing: 0.2em;
}

.page-about .about-cta .about-sec__title {
  margin-top: 8px;
}

.page-about .about-cta__links {
  display: grid;
  gap: 10px;
  margin-top: 16px;
}

.page-about .about-cta__link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: rgba(5, 19, 15, 0.5);
  color: var(--text);
  text-decoration: none;
  font-size: 14px;
  line-height: 1.5;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease),
    transform var(--dur) var(--ease);
}

.page-about .about-cta__link .mono {
  color: var(--cyan);
  font-size: 14px;
}

.page-about .about-cta__link:hover,
.page-about .about-cta__link:focus-visible {
  border-color: var(--cyan);
  color: var(--cyan-mist);
  transform: translateX(2px);
}

/* ---------- 渐进增强 ---------- */
.page-about [data-tab-panel][aria-hidden="true"] {
  display: none;
}

/* ---------- 断点 ---------- */
@media (min-width: 620px) {
  .page-about .about-band {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

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

  .page-about .mile__item {
    grid-template-columns: 84px minmax(0, 1fr);
    gap: 20px;
  }
}

@media (min-width: 900px) {
  .page-about {
    padding-bottom: 72px;
  }

  .page-about .about-hero {
    padding-top: calc(var(--strip-h) + 42px);
  }

  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.42fr) minmax(0, 1fr);
    gap: 40px;
    align-items: start;
    margin-top: 24px;
  }

  .page-about .about-band {
    margin-top: 34px;
  }

  .page-about .about-band__cell {
    padding: 20px 18px;
  }

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

  .page-about .about-body {
    padding-top: 56px;
  }

  .page-about .ver {
    grid-template-columns: 230px minmax(0, 1fr);
    gap: 40px;
    align-items: start;
  }

  .page-about .cover-wide {
    grid-column: span 1;
  }
}

@media (min-width: 960px) {
  .page-about .about-body {
    display: grid;
    grid-template-columns: var(--ab-idx-w) minmax(0, 1fr);
    gap: 48px;
    align-items: start;
  }

  .page-about .about-index {
    display: block;
    position: sticky;
    top: calc(var(--strip-h) + 72px);
  }

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

  .page-about .about-sec:first-child {
    padding-top: 0;
  }
}

@media (min-width: 1180px) {
  .page-about .about-hero h1 {
    max-width: 20ch;
  }

  .page-about .about-sec p {
    font-size: 15.5px;
  }
}
<<<END>>>