.page-about {
  --about-rail: 104px;
  --about-prose: 60ch;
  --about-glow: rgba(56, 242, 196, 0.16);
  display: block;
  color: var(--bone);
  background: var(--ink);
  overflow-x: hidden;
}

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

/* ---------- 面包屑 ---------- */
.page-about .breadcrumbs {
  padding-top: clamp(16px, 3vw, 26px);
}
.page-about .breadcrumbs__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--moss);
}
.page-about .breadcrumbs__item + .breadcrumbs__item::before {
  content: "—";
  margin-right: 8px;
  color: var(--line);
}
.page-about .breadcrumbs__item a {
  color: var(--moss);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}
.page-about .breadcrumbs__item a:hover,
.page-about .breadcrumbs__item a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}
.page-about .breadcrumbs__item[aria-current="page"] {
  color: var(--bone);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(24px, 5vw, 56px) 0 clamp(32px, 6vw, 72px);
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(120% 90% at 84% 4%, var(--about-glow), transparent 58%),
    linear-gradient(180deg, var(--deep) 0%, var(--ink) 78%);
}
.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(to right, rgba(30, 74, 61, 0.55) 0 1px, transparent 1px 76px),
    repeating-linear-gradient(to bottom, rgba(30, 74, 61, 0.4) 0 1px, transparent 1px 76px);
  opacity: 0.7;
}
.page-about .about-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(24px, 4vw, 44px);
}
.page-about .about-hero__meta {
  margin: 0 0 14px;
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--cyan);
  text-transform: uppercase;
}
.page-about .about-hero__title {
  margin: 0 0 18px;
  font-size: clamp(30px, 7.2vw, 60px);
  line-height: 1.08;
  letter-spacing: -0.01em;
  font-weight: 800;
}
.page-about .about-hero__intro {
  margin: 0;
  max-width: 54ch;
  font-size: 17px;
  line-height: 1.9;
  color: #DCD7CA;
}
.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px 20px;
  margin: 28px 0 0;
}
.page-about .about-fact {
  border-top: 1px solid var(--line);
  padding-top: 10px;
}
.page-about .about-fact__label {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--moss);
}
.page-about .about-fact__num {
  margin: 6px 0 0 0;
  font-size: clamp(22px, 3.4vw, 30px);
  line-height: 1.2;
  color: var(--cyan);
  border-bottom: 2px solid rgba(56, 242, 196, 0.4);
  display: inline-block;
  padding-bottom: 2px;
}
.page-about .about-hero__media {
  margin: 0;
}
.page-about .about-hero__media img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  border: 1px solid var(--line);
}
.page-about .media-frame__caption {
  margin-top: 12px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--moss);
}

/* ---------- 章节索引条 ---------- */
.page-about .about-toc {
  border-bottom: 1px solid var(--line);
  background: rgba(43, 53, 50, 0.4);
}
.page-about .about-toc__inner {
  display: flex;
  gap: 22px;
  padding: 12px 0;
  overflow-x: auto;
  scrollbar-width: none;
}
.page-about .about-toc__inner::-webkit-scrollbar {
  display: none;
}
.page-about .about-toc__link {
  flex: 0 0 auto;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--moss);
  text-decoration: none;
  white-space: nowrap;
  padding-bottom: 2px;
  border-bottom: 1px solid transparent;
  transition: color 0.25s ease, border-color 0.25s ease;
}
.page-about .about-toc__link:hover,
.page-about .about-toc__link:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

/* ---------- 区块骨架 ---------- */
.page-about .about-block {
  padding: clamp(40px, 6vw, 80px) 0;
  border-bottom: 1px solid rgba(30, 74, 61, 0.6);
  scroll-margin-top: 24px;
}
.page-about .about-block:nth-of-type(even) {
  background: rgba(43, 53, 50, 0.26);
}
.page-about .about-block:target {
  background: rgba(56, 242, 196, 0.06);
  box-shadow: inset 3px 0 0 var(--cyan);
}
.page-about .about-block__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
}
.page-about .about-index {
  display: flex;
  align-items: center;
  gap: 10px;
}
.page-about .about-index__num {
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--clay);
}
.page-about .about-index__label {
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--moss);
}
.page-about .about-index::after {
  content: "";
  width: 28px;
  height: 1px;
  background: var(--line);
  flex: 0 0 auto;
}
.page-about .about-block__title {
  margin: 0 0 16px;
  font-size: clamp(24px, 4.4vw, 36px);
  line-height: 1.2;
  letter-spacing: -0.005em;
  font-weight: 800;
}
.page-about .about-block__lead {
  margin: 0 0 24px;
  max-width: var(--about-prose);
  font-size: 16.5px;
  line-height: 1.85;
  color: var(--moss);
}
.page-about .about-prose {
  max-width: var(--about-prose);
}
.page-about .about-prose p {
  margin: 0 0 18px;
  font-size: 17px;
  line-height: 1.85;
  color: #DCD7CA;
}
.page-about .about-prose p:last-child {
  margin-bottom: 0;
}
.page-about .hl {
  color: var(--bone);
  border-bottom: 2px solid rgba(56, 242, 196, 0.45);
  padding-bottom: 1px;
}

/* ---------- 01 起点 ---------- */
.page-about .about-quote {
  margin: 26px 0 0;
  padding: 18px 22px;
  max-width: var(--about-prose);
  border-left: 2px solid var(--cyan);
  background: linear-gradient(90deg, rgba(56, 242, 196, 0.09), transparent 72%);
  font-size: 17px;
  line-height: 1.8;
  color: var(--bone);
}
.page-about .about-origin__media {
  margin: 30px 0 0;
  max-width: 640px;
}
.page-about .about-origin__media img {
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border: 1px solid var(--line);
}

/* ---------- 02 时间轴 ---------- */
.page-about .about-timeline__list {
  list-style: none;
  margin: 0;
  padding: 0 0 0 30px;
  position: relative;
}
.page-about .about-timeline__list::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 10px;
  bottom: 12px;
  width: 1px;
  background: linear-gradient(180deg, var(--cyan), var(--line) 45%, transparent);
}
.page-about .about-timeline__item {
  position: relative;
  padding-bottom: 18px;
}
.page-about .about-timeline__item:last-child {
  padding-bottom: 0;
}
.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -30px;
  top: 8px;
  width: 15px;
  height: 15px;
  border: 1px solid var(--cyan);
  background: var(--ink);
  transform: rotate(45deg);
  transition: background 0.3s ease, box-shadow 0.3s ease;
}
.page-about .about-timeline__item:hover::before,
.page-about .about-timeline__item:focus-within::before {
  background: var(--cyan);
  box-shadow: 0 0 0 6px rgba(56, 242, 196, 0.16);
}
.page-about .about-timeline__card {
  padding: 16px 18px;
  background: rgba(43, 53, 50, 0.5);
  border: 1px solid var(--line);
  border-left: 2px solid transparent;
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 0 100%);
  transition: background 0.3s ease, border-color 0.3s ease;
}
.page-about .about-timeline__item:hover .about-timeline__card,
.page-about .about-timeline__item:focus-within .about-timeline__card {
  background: rgba(43, 53, 50, 0.82);
  border-left-color: var(--cyan);
}
.page-about .about-timeline__step {
  display: block;
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--clay);
}
.page-about .about-timeline__name {
  margin: 8px 0 6px;
  font-size: 19px;
  font-weight: 700;
}
.page-about .about-timeline__detail {
  margin: 0;
  max-width: 58ch;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--moss);
  transition: color 0.3s ease;
}
.page-about .about-timeline__item:hover .about-timeline__detail,
.page-about .about-timeline__item:focus-within .about-timeline__detail {
  color: #D3CEC1;
}

/* ---------- 03 团队 ---------- */
.page-about .about-team__grid {
  display: grid;
  gap: clamp(24px, 4vw, 40px);
}
.page-about .about-role {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  gap: 14px;
  padding: 20px 0;
  border-top: 1px solid var(--line);
}
.page-about .about-role:last-child {
  border-bottom: 1px solid var(--line);
}
.page-about .about-role__num {
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--cyan);
  padding-top: 5px;
}
.page-about .about-role__name {
  margin: 0 0 8px;
  font-size: 19px;
  font-weight: 700;
}
.page-about .about-role p {
  margin: 0;
  max-width: 54ch;
  font-size: 16px;
  line-height: 1.8;
  color: #CBC6B9;
}
.page-about .about-team__media {
  margin: 0;
}
.page-about .about-team__media img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border: 1px solid var(--line);
}

/* ---------- 04 专题体系 ---------- */
.page-about .about-leagues {
  display: grid;
  gap: var(--gap);
}
.page-about .about-league {
  padding: 20px 22px 22px;
  background: rgba(43, 53, 50, 0.6);
  border-top: 2px solid var(--cyan);
  clip-path: polygon(0 0, calc(100% - 16px) 0, 100% 16px, 100% 100%, 0 100%);
}
.page-about .about-league:nth-child(2) {
  border-top-color: var(--clay);
}
.page-about .about-league:nth-child(3) {
  border-top-color: var(--dawn);
}
.page-about .about-league__name {
  margin: 12px 0 8px;
  font-size: 18px;
  font-weight: 700;
}
.page-about .about-league p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: #CBC6B9;
}
.page-about .about-phases {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.page-about .about-phase {
  background: var(--ink);
  padding: 18px 16px;
}
.page-about .about-phase__num {
  display: block;
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--clay);
}
.page-about .about-phase__name {
  margin: 8px 0 6px;
  font-size: 17px;
  font-weight: 700;
}
.page-about .about-phase__desc {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--moss);
}

/* ---------- 05 记分与复核 ---------- */
.page-about .about-verify__pair {
  display: grid;
  gap: 0;
  margin-top: 8px;
}
.page-about .about-verify__col {
  padding: 22px;
}
.page-about .about-verify__col:first-child {
  background: rgba(43, 53, 50, 0.55);
}
.page-about .about-verify__col:last-child {
  background: rgba(15, 61, 46, 0.5);
}
.page-about .about-verify__label {
  display: block;
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--cyan);
}
.page-about .about-verify__name {
  margin: 10px 0 10px;
  font-size: 19px;
  font-weight: 700;
}
.page-about .about-verify__col p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.85;
  color: #CBC6B9;
}
.page-about .about-verify__note {
  margin: 24px 0 0;
  max-width: var(--about-prose);
  padding-top: 18px;
  border-top: 1px solid var(--line);
  font-size: 16px;
  line-height: 1.85;
  color: #DCD7CA;
}

/* ---------- 06 长期可回看 ---------- */
.page-about .about-archive__grid {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
}
.page-about .about-archive__figure {
  display: grid;
  gap: 8px;
  align-content: start;
  padding: 22px;
  background: linear-gradient(150deg, rgba(15, 61, 46, 0.8), rgba(11, 16, 14, 0.9));
  border: 1px solid var(--line);
  clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 0 100%);
}
.page-about .about-archive__num {
  font-size: clamp(40px, 11vw, 76px);
  line-height: 1;
  color: var(--cyan);
  border-bottom: 3px solid rgba(56, 242, 196, 0.35);
  display: inline-block;
  padding-bottom: 8px;
}
.page-about .about-archive__unit {
  font-size: 14px;
  letter-spacing: 0.08em;
  color: var(--moss);
}

/* ---------- 收束行动 ---------- */
.page-about .about-next {
  border-bottom: none;
  padding-bottom: clamp(48px, 7vw, 88px);
}
.page-about .about-next__inner {
  padding: clamp(24px, 4vw, 44px);
  background: linear-gradient(120deg, rgba(15, 61, 46, 0.78), rgba(11, 16, 14, 0.92));
}
.page-about .about-next__title {
  margin: 0 0 10px;
  font-size: clamp(22px, 3.6vw, 30px);
  font-weight: 800;
}
.page-about .about-next__text {
  margin: 0;
  max-width: 52ch;
  font-size: 16px;
  line-height: 1.85;
  color: #CBC6B9;
}
.page-about .about-next__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .about-hero__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-verify__pair {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  }
  .page-about .about-verify__col + .about-verify__col {
    border-left: 1px solid rgba(56, 242, 196, 0.4);
  }
  .page-about .about-phases {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    align-items: end;
  }
  .page-about .about-block__grid {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: var(--gap);
  }
  .page-about .about-index {
    display: block;
    position: sticky;
    top: 24px;
    align-self: start;
  }
  .page-about .about-index::after {
    margin-top: 14px;
  }
  .page-about .about-index__label {
    display: block;
    margin-top: 8px;
  }
  .page-about .about-leagues {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.8fr);
    align-items: start;
  }
  .page-about .about-team__media {
    margin-top: 56px;
  }
  .page-about .about-archive__grid {
    grid-template-columns: minmax(0, 0.72fr) minmax(0, 1fr);
    align-items: start;
  }
}

@media (min-width: 1180px) {
  .page-about .about-block__grid {
    grid-template-columns: 128px minmax(0, 1fr) minmax(0, 0.42fr);
  }
  .page-about .about-block__body {
    grid-column: 2 / 4;
  }
  .page-about .about-block__body .about-prose,
  .page-about .about-block__body .about-block__lead {
    max-width: 62ch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-timeline__item::before,
  .page-about .about-timeline__card,
  .page-about .about-timeline__detail,
  .page-about .about-toc__link {
    transition: none;
  }
}
<<<END>>>