.page-about {
  --about-rail: 152px;
  --about-node: 15px;
  --about-line-light: #D7DDE1;
  --cat-ball: #FF4D00;
  --cat-combat: #E01B24;
  --cat-track: #FFD400;
  --cat-water: #2D9CFF;
  --cat-skill: #93A1AD;
  --cat-snow: #7A2A0A;
}

.page-about [hidden] {
  display: none !important;
}

.page-about :focus-visible {
  outline: 2px solid var(--bolt);
  outline-offset: 3px;
}

.page-about .mono {
  font-family: var(--font-mono);
  letter-spacing: 0.02em;
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumb {
  padding-top: 24px;
}

.page-about .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: var(--step-xs);
  letter-spacing: 0.06em;
  color: var(--steel);
}

.page-about .breadcrumb li + li::before {
  content: "/";
  margin: 0 10px;
  color: var(--ink-700);
}

.page-about .breadcrumb [aria-current="page"] {
  color: var(--mist);
}

/* ---------- 区块标题行 ---------- */
.page-about .about-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 14px 40px;
  margin-bottom: clamp(28px, 4vw, 44px);
}

.page-about .about-head h2 {
  margin: 10px 0 0;
}

.page-about .about-headnote {
  max-width: 42ch;
  margin: 0;
  font-size: var(--step-sm);
  line-height: 1.9;
  color: var(--steel);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-top: clamp(32px, 5vw, 64px);
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(32px, 5vw, 64px);
}

@media (min-width: 1000px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 0.88fr) minmax(0, 1.12fr);
    align-items: start;
  }
}

.page-about .about-hero__lead {
  margin: 22px 0 0;
  max-width: 46ch;
  font-size: var(--step-md);
  line-height: 1.9;
  color: var(--mist);
}

.page-about .about-hero__note {
  margin: 18px 0 0;
  max-width: 46ch;
  padding-left: 14px;
  border-left: 2px solid var(--lava);
  font-size: var(--step-sm);
  line-height: 1.9;
  color: var(--steel);
}

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

.page-about .about-hero__visual {
  display: grid;
  gap: 20px;
}

@media (min-width: 1000px) {
  .page-about .about-hero__visual {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.95fr);
    align-items: start;
  }
}

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

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  background: var(--ink-700);
  border: 1px solid var(--ink-700);
}

.page-about .about-stat {
  padding: 18px 16px;
  background: var(--ink-900);
}

.page-about .about-stat dt {
  font-family: var(--font-mono);
  font-size: var(--step-xs);
  letter-spacing: 0.08em;
  color: var(--steel);
}

.page-about .about-stat__value {
  margin: 8px 0 0;
  font-family: var(--font-mono);
  font-size: clamp(24px, 3vw, 38px);
  font-weight: 700;
  line-height: 1.1;
  color: var(--mist);
}

/* ---------- 业务本质 ---------- */
.page-about .about-essence__grid {
  display: grid;
  gap: clamp(24px, 4vw, 56px);
}

@media (min-width: 900px) {
  .page-about .about-essence__grid {
    grid-template-columns: minmax(0, 0.36fr) minmax(0, 0.64fr);
  }
}

.page-about .about-essence__body p {
  margin-top: 0;
  color: var(--steel);
}

.page-about .about-essence__body p:first-child {
  color: var(--mist);
  font-size: var(--step-lg);
  line-height: 1.75;
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline__layout {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
}

@media (min-width: 900px) {
  .page-about .about-timeline__layout {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
  }
}

.page-about .about-rail__title {
  margin: 0 0 12px;
  font-size: var(--step-xs);
  letter-spacing: 0.14em;
  color: var(--steel);
}

.page-about .about-rail__list {
  display: flex;
  gap: 6px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
}

@media (min-width: 900px) {
  .page-about .about-rail__list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding: 0;
    border-left: 1px solid var(--ink-700);
  }

  .page-about .about-rail {
    position: sticky;
    top: 128px;
    align-self: start;
  }
}

.page-about .about-rail__link {
  display: block;
  padding: 7px 13px;
  font-family: var(--font-mono);
  font-size: var(--step-sm);
  color: var(--steel);
  text-decoration: none;
  border: 1px solid var(--ink-700);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease),
    background var(--dur) var(--ease);
}

@media (min-width: 900px) {
  .page-about .about-rail__link {
    border: 0;
    border-left: 2px solid transparent;
    margin-left: -1px;
    padding: 5px 0 5px 15px;
  }
}

.page-about .about-rail__link:hover,
.page-about .about-rail__link:focus-visible {
  color: var(--bolt);
  border-color: var(--lava);
  background: var(--lava-soft);
}

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

.page-about .about-track::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, var(--lava) 0%, var(--soil) 45%, var(--ink-700) 100%);
}

.page-about .about-track__item {
  position: relative;
  padding: 0 0 40px 36px;
  scroll-margin-top: 140px;
}

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

.page-about .about-track__node {
  position: absolute;
  left: 0;
  top: 5px;
  width: var(--about-node);
  height: var(--about-node);
  border-radius: 50%;
  background: var(--ink-900);
  border: 2px solid var(--lava);
  box-shadow: 0 0 0 4px rgba(255, 77, 0, 0.12);
}

.page-about .about-track__title {
  margin: 10px 0 8px;
  font-size: var(--step-lg);
  font-weight: 800;
  line-height: 1.4;
  color: var(--mist);
}

.page-about .about-track__text {
  margin: 0;
  max-width: 62ch;
  font-size: var(--step-md);
  line-height: 1.9;
  color: var(--steel);
}

.page-about .about-track__item:target .about-track__title {
  color: var(--bolt);
}

.page-about .about-track__item:target .about-track__node {
  background: var(--lava);
}

/* ---------- 校对流程 ---------- */
.page-about .about-proof__figure {
  margin: 0 0 clamp(24px, 3vw, 36px);
}

.page-about .about-steps {
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--ink-700);
  border: 1px solid var(--ink-700);
}

@media (min-width: 800px) {
  .page-about .about-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-about .about-step {
  padding: clamp(20px, 3vw, 32px);
  background: var(--ink-900);
  transition: background var(--dur) var(--ease);
}

.page-about .about-step:hover {
  background: var(--ink-800);
}

.page-about .about-step__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--step-sm);
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--lava);
}

.page-about .about-step h3 {
  margin: 14px 0 10px;
  font-size: var(--step-lg);
  font-weight: 800;
  color: var(--mist);
}

.page-about .about-step__text {
  margin: 0;
  font-size: var(--step-md);
  line-height: 1.9;
  color: var(--steel);
}

/* ---------- 分类表格 ---------- */
.page-about .about-filter__chips {
  margin-bottom: 24px;
}

.page-about .about-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--ink-700);
}

.page-about .about-cat-table {
  width: 100%;
  min-width: 760px;
  margin: 0;
  border-collapse: collapse;
  font-size: var(--step-sm);
}

.page-about .about-cat-table thead th {
  padding: 14px 16px;
  text-align: left;
  white-space: nowrap;
  font-family: var(--font-mono);
  font-size: var(--step-xs);
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--steel);
  background: var(--ink-800);
  border-bottom: 1px solid var(--ink-700);
}

.page-about .about-cat-table tbody tr {
  --row: var(--steel);
  background: var(--ink-900);
  transition: background var(--dur) var(--ease);
}

.page-about .about-cat-table tbody tr[data-tags="球类对抗"] { --row: var(--cat-ball); }
.page-about .about-cat-table tbody tr[data-tags="格斗竞技"] { --row: var(--cat-combat); }
.page-about .about-cat-table tbody tr[data-tags="田径路跑"] { --row: var(--cat-track); }
.page-about .about-cat-table tbody tr[data-tags="水上项目"] { --row: var(--cat-water); }
.page-about .about-cat-table tbody tr[data-tags="技巧评分类"] { --row: var(--cat-skill); }
.page-about .about-cat-table tbody tr[data-tags="冰雪与综合"] { --row: var(--cat-snow); }

.page-about .about-cat-table tbody tr:hover {
  background: var(--lava-soft);
}

.page-about .about-cat-table th[scope="row"],
.page-about .about-cat-table td {
  padding: 18px 16px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--ink-700);
}

.page-about .about-cat-table th[scope="row"] {
  position: relative;
  padding-left: 30px;
  font-weight: 800;
  font-size: var(--step-md);
  color: var(--mist);
  white-space: nowrap;
}

.page-about .about-cat-table th[scope="row"]::before {
  content: "";
  position: absolute;
  left: 14px;
  top: 25px;
  width: 7px;
  height: 7px;
  background: var(--row);
}

.page-about .about-cat-items {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-cat-items li {
  padding: 3px 9px;
  border-left: 2px solid var(--row);
  background: var(--ink-800);
  font-size: var(--step-xs);
  color: var(--mist);
  white-space: nowrap;
}

.page-about .about-cat-table__count {
  font-family: var(--font-mono);
  font-size: var(--step-lg);
  font-weight: 700;
  color: var(--row);
}

.page-about .about-cat-table .mono-chip {
  margin: 0 4px 4px 0;
}

/* ---------- 团队 ---------- */
.page-about .about-crew__grid {
  display: grid;
  gap: 1px;
  background: var(--ink-700);
  border: 1px solid var(--ink-700);
}

@media (min-width: 640px) {
  .page-about .about-crew__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1000px) {
  .page-about .about-crew__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-about .about-crew__card {
  padding: clamp(20px, 3vw, 28px);
  background: var(--ink-900);
  transition: background var(--dur) var(--ease);
}

.page-about .about-crew__card:hover {
  background: var(--ink-800);
}

.page-about .about-crew__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(26px, 3vw, 36px);
  font-weight: 700;
  line-height: 1.05;
  color: var(--lava);
}

.page-about .about-crew__card h3 {
  margin: 10px 0 8px;
  font-size: var(--step-md);
  font-weight: 800;
  color: var(--mist);
}

.page-about .about-crew__card p {
  margin: 0;
  font-size: var(--step-sm);
  line-height: 1.9;
  color: var(--steel);
}

/* ---------- 桌面端 ---------- */
.page-about .about-desk {
  background:
    radial-gradient(120% 90% at 88% 12%, rgba(122, 42, 10, 0.42), transparent 62%),
    var(--ink-800);
  border-top: 1px solid var(--ink-700);
  border-bottom: 1px solid var(--ink-700);
}

.page-about .about-desk__grid {
  display: grid;
  gap: clamp(28px, 4vw, 56px);
}

@media (min-width: 900px) {
  .page-about .about-desk__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.08fr);
    align-items: start;
  }
}

.page-about .about-desk__lead {
  margin: 18px 0 28px;
  max-width: 46ch;
  font-size: var(--step-md);
  line-height: 1.9;
  color: var(--mist);
}

.page-about .about-desk__list {
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--ink-700);
  border: 1px solid var(--ink-700);
}

.page-about .about-desk__list li {
  padding: 22px 24px;
  background: var(--ink-900);
  transition: background var(--dur) var(--ease);
}

.page-about .about-desk__list li:hover {
  background: var(--ink-850);
}

.page-about .about-desk__list h3 {
  margin: 12px 0 8px;
  font-size: var(--step-lg);
  font-weight: 800;
  color: var(--mist);
}

.page-about .about-desk__list p {
  margin: 0;
  font-size: var(--step-md);
  line-height: 1.9;
  color: var(--steel);
}

.page-about .about-desk__list .mono-chip {
  margin: 0;
}

/* ---------- 协作 ---------- */
.page-about .about-collab__grid {
  display: grid;
  gap: clamp(28px, 4vw, 56px);
}

@media (min-width: 900px) {
  .page-about .about-collab__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.88fr);
    align-items: center;
  }
}

.page-about .about-collab__text p {
  margin: 18px 0 0;
  max-width: 54ch;
  font-size: var(--step-md);
  line-height: 1.9;
  color: var(--steel);
}

.page-about .about-collab__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 28px;
  margin-top: 28px;
  padding-top: 22px;
  border-top: 1px solid var(--ink-700);
}

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

/* ---------- 站点信息 ---------- */
.page-about .about-site__grid {
  display: grid;
  gap: clamp(28px, 4vw, 48px);
}

@media (min-width: 860px) {
  .page-about .about-site__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: start;
  }
}

.page-about .about-site h2 {
  margin: 10px 0 0;
  color: var(--paper-ink);
}

.page-about .about-site__text {
  margin: 18px 0 28px;
  max-width: 46ch;
  font-size: var(--step-md);
  line-height: 1.9;
  color: var(--paper-sub);
}

.page-about .about-site__btn {
  margin-top: 4px;
}

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

.page-about .about-site__fact {
  padding: 16px 18px;
  background: var(--paper);
}

.page-about .about-site__fact dt {
  font-family: var(--font-mono);
  font-size: var(--step-xs);
  letter-spacing: 0.08em;
  color: var(--paper-sub);
}

.page-about .about-site__fact dd {
  margin: 8px 0 0;
  font-size: var(--step-md);
  font-weight: 600;
  color: var(--paper-ink);
  word-break: break-word;
}

.page-about .about-site__note {
  margin: 0;
  padding: 16px 18px;
  background: var(--paper);
  font-size: var(--step-sm);
  line-height: 1.8;
  color: var(--paper-sub);
}

/* ---------- 窄屏收口 ---------- */
@media (max-width: 639px) {
  .page-about .about-stats {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-about .about-cat-table th[scope="row"] {
    padding-left: 26px;
  }
}
<<<END>>>