.page-about {
  --about-rail-w: 236px;
  --about-num: var(--font-numeric);
  background: var(--ink-900);
  color: var(--paper);
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumb {
  padding-top: clamp(18px, 3vw, 30px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(16px, 3vw, 32px) 0 clamp(42px, 6vw, 72px);
  border-bottom: 1px solid var(--line);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(118deg, rgba(43, 232, 200, 0.14), rgba(43, 232, 200, 0) 46%),
    linear-gradient(300deg, rgba(255, 122, 47, 0.12), rgba(255, 122, 47, 0) 42%),
    repeating-linear-gradient(90deg, rgba(31, 58, 51, 0.5) 0 1px, transparent 1px 104px);
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
}

.page-about .about-hero__tag {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin: 0 0 clamp(16px, 2.4vw, 24px);
  padding: 6px 15px 6px 11px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--glass);
  font-family: var(--about-num);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--cyan-soft);
}

.page-about .about-hero__tag::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(43, 232, 200, 0.16);
}

.page-about .about-hero__title {
  margin: 0;
  max-width: 18ch;
  font-family: var(--font-heading);
  font-size: clamp(34px, 7.6vw, 66px);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .about-hero__lead {
  margin: clamp(18px, 2.6vw, 26px) 0 0;
  max-width: 64ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.85;
  color: var(--muted);
}

.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(28px, 4vw, 46px) 0 0;
  padding: 1px;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-fact {
  padding: 16px 16px 18px;
  background: var(--ink-800);
  border-top: 3px solid var(--cyan);
}

.page-about .about-fact:nth-child(2),
.page-about .about-fact:nth-child(4) {
  border-top-color: var(--orange);
}

.page-about .about-fact__num {
  display: block;
  font-family: var(--about-num);
  font-size: clamp(34px, 6.4vw, 52px);
  font-weight: 500;
  line-height: 0.95;
  font-variant-numeric: tabular-nums;
  color: var(--paper);
}

.page-about .about-fact__label {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
}

/* ---------- 流程区 ---------- */
.page-about .about-flow {
  background: var(--ink-800);
  border-bottom: 1px solid var(--line);
}

.page-about .about-flow__grid {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
}

.page-about .about-flow__rail-caption {
  margin: 0 0 12px;
  font-family: var(--about-num);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--dim);
}

.page-about .about-flow__list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(148px, 1fr));
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-flow__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 10px 12px;
  border-left: 3px solid var(--line);
  color: var(--muted);
  font-size: 14px;
  line-height: 1.5;
  text-decoration: none;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease), background-color 0.18s var(--ease);
}

.page-about .about-flow__link:hover,
.page-about .about-flow__link:focus-visible {
  color: var(--paper);
  border-left-color: var(--cyan);
  background: rgba(43, 232, 200, 0.08);
}

.page-about .about-flow__n {
  font-family: var(--about-num);
  font-size: 15px;
  font-variant-numeric: tabular-nums;
  color: var(--cyan);
}

.page-about .about-flow__rail-note {
  margin: 16px 0 0;
  padding-left: 12px;
  border-left: 1px solid var(--line);
  font-size: 13px;
  line-height: 1.75;
  color: var(--dim);
}

.page-about .about-flow__stream {
  min-width: 0;
}

.page-about .about-flow__lead {
  margin-bottom: clamp(20px, 3vw, 30px);
}

.page-about .about-flow__intro {
  margin: clamp(14px, 2vw, 20px) 0 0;
  max-width: 66ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--muted);
}

.page-about .about-flow__figure {
  margin: clamp(22px, 3vw, 34px) 0 0;
}

.page-about .flow-node {
  padding: clamp(22px, 3vw, 30px) 0 clamp(24px, 3.4vw, 34px);
  border-top: 1px solid var(--line);
  scroll-margin-top: calc(var(--header-h) + 20px);
}

.page-about .flow-node:last-child {
  border-bottom: 1px solid var(--line);
}

.page-about .flow-node__meta {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin: 0 0 10px;
}

.page-about .flow-node__idx {
  font-family: var(--about-num);
  font-size: clamp(26px, 4.6vw, 40px);
  font-weight: 500;
  line-height: 1;
  font-variant-numeric: tabular-nums;
  color: var(--cyan);
}

.page-about .flow-node[data-role="data"] .flow-node__idx {
  color: var(--orange);
}

.page-about .flow-node__role {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--dim);
}

.page-about .flow-node__title {
  margin: 0 0 10px;
  font-family: var(--font-heading);
  font-size: clamp(19px, 2.6vw, 24px);
  font-weight: 700;
  line-height: 1.35;
  color: var(--paper);
}

.page-about .flow-node__body {
  margin: 0;
  max-width: 68ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--muted);
}

.page-about .flow-node__more {
  margin-top: 14px;
  border: 1px solid var(--line);
  background: var(--glass);
}

.page-about .flow-node__more > summary {
  padding: 10px 14px;
  cursor: pointer;
  list-style: none;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--cyan-soft);
}

.page-about .flow-node__more > summary::-webkit-details-marker {
  display: none;
}

.page-about .flow-node__more > summary::before {
  content: "＋";
  display: inline-block;
  margin-right: 8px;
  color: var(--cyan);
}

.page-about .flow-node__more[open] > summary::before {
  content: "－";
}

.page-about .flow-node__more > p {
  margin: 0;
  padding: 0 14px 14px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 赛季归档 ---------- */
.page-about .about-archive__lead {
  margin: clamp(14px, 2vw, 20px) 0 0;
  max-width: 70ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--muted);
}

.page-about .about-archive__band {
  margin: clamp(22px, 3vw, 34px) 0;
}

.page-about .about-archive__filters {
  margin-bottom: clamp(18px, 2.6vw, 26px);
}

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

.page-about .archive-row {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr) auto;
  align-items: center;
  gap: 6px 14px;
  padding: 12px 8px;
  border-bottom: 1px solid var(--line);
  transition: background-color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-about .archive-row:hover {
  background: var(--glass);
}

.page-about .archive-row__season {
  font-family: var(--about-num);
  font-size: 19px;
  font-weight: 500;
  font-variant-numeric: tabular-nums;
  color: var(--cyan);
}

.page-about .archive-row__name {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-size: 14px;
  color: var(--paper);
}

.page-about .archive-row__state {
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--dim);
}

.page-about .archive-row__count {
  font-family: var(--about-num);
  font-size: 17px;
  font-variant-numeric: tabular-nums;
  text-align: right;
  color: var(--orange-soft);
}

.page-about .about-archive__note {
  margin: clamp(20px, 2.6vw, 28px) 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-archive__note a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(43, 232, 200, 0.4);
}

.page-about .about-archive__note a:hover,
.page-about .about-archive__note a:focus-visible {
  color: var(--cyan-soft);
  border-bottom-color: var(--cyan-soft);
}

/* ---------- 细节数据 ---------- */
.page-about .about-detail {
  background: var(--ink-800);
  border-block: 1px solid var(--line);
}

.page-about .about-detail__grid {
  display: grid;
  gap: clamp(24px, 3.6vw, 44px);
}

.page-about .about-detail__body {
  margin: clamp(14px, 2vw, 20px) 0 0;
  max-width: 64ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--muted);
}

.page-about .about-detail__list {
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-about .about-detail__item {
  display: grid;
  gap: 4px;
  padding: 14px 0 14px 16px;
  border-bottom: 1px solid var(--line);
  border-left: 3px solid var(--orange);
}

.page-about .about-detail__key {
  font-family: var(--font-heading);
  font-size: 17px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-detail__val {
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

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

/* ---------- 更新节奏 ---------- */
.page-about .about-cadence__lead {
  margin: clamp(14px, 2vw, 20px) 0 0;
  max-width: 68ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--muted);
}

.page-about .cadence-list {
  margin: clamp(24px, 3.2vw, 36px) 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-about .cadence-item {
  display: grid;
  gap: 6px;
  padding: 16px 16px 18px 18px;
  border-bottom: 1px solid var(--line);
  border-left: 4px solid var(--cyan);
  background: linear-gradient(90deg, rgba(43, 232, 200, 0.07), rgba(43, 232, 200, 0) 48%);
}

.page-about .cadence-item--orange {
  border-left-color: var(--orange);
  background: linear-gradient(90deg, rgba(255, 122, 47, 0.08), rgba(255, 122, 47, 0) 48%);
}

.page-about .cadence-item__when {
  font-family: var(--about-num);
  font-size: 17px;
  letter-spacing: 0.02em;
  color: var(--paper);
}

.page-about .cadence-item__what {
  font-size: 15px;
  line-height: 1.7;
  color: var(--muted);
}

.page-about .cadence-item__who {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--dim);
}

/* ---------- 赛季专题 ---------- */
.page-about .about-topics__lead {
  margin: clamp(14px, 2vw, 20px) 0 0;
  max-width: 70ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--muted);
}

.page-about .topic-lanes {
  display: grid;
  gap: 1px;
  margin: clamp(24px, 3.2vw, 36px) 0 0;
  padding: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .topic-lane {
  padding: clamp(20px, 3vw, 30px);
  background: var(--ink-800);
  border-top: 5px solid var(--cyan);
}

.page-about .topic-lane--top {
  border-top-color: var(--cyan-soft);
}

.page-about .topic-lane--survive {
  border-top-color: var(--orange);
}

.page-about .topic-lane__idx {
  margin: 0;
  font-family: var(--about-num);
  font-size: 34px;
  font-weight: 500;
  line-height: 1;
  color: var(--line);
}

.page-about .topic-lane__name {
  margin: 12px 0 8px;
  font-family: var(--font-heading);
  font-size: clamp(20px, 2.6vw, 24px);
  font-weight: 700;
  color: var(--paper);
}

.page-about .topic-lane__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-topics__note {
  margin: clamp(18px, 2.4vw, 24px) 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-topics__note a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(43, 232, 200, 0.4);
}

.page-about .about-topics__note a:hover,
.page-about .about-topics__note a:focus-visible {
  color: var(--cyan-soft);
  border-bottom-color: var(--cyan-soft);
}

/* ---------- 工作习惯 ---------- */
.page-about .about-habits {
  background: var(--ink-800);
  border-block: 1px solid var(--line);
}

.page-about .habit-grid {
  display: grid;
  gap: 1px;
  margin-top: clamp(24px, 3.2vw, 34px);
  padding: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .habit-item {
  padding: clamp(18px, 2.6vw, 26px);
  background: var(--ink-800);
}

.page-about .habit-item__num {
  display: block;
  font-family: var(--about-num);
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--orange);
}

.page-about .habit-item__name {
  margin: 10px 0 8px;
  font-family: var(--font-heading);
  font-size: clamp(17px, 2.2vw, 20px);
  font-weight: 700;
  line-height: 1.4;
  color: var(--paper);
}

.page-about .habit-item__body {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 收尾 ---------- */
.page-about .about-cta__inner {
  padding: clamp(26px, 4vw, 44px);
  border: 1px solid var(--line);
  background:
    linear-gradient(120deg, rgba(43, 232, 200, 0.1), rgba(43, 232, 200, 0) 52%),
    var(--glass);
}

.page-about .about-cta__title {
  margin: 0;
  max-width: 26ch;
  font-family: var(--font-heading);
  font-size: clamp(22px, 3.4vw, 34px);
  font-weight: 900;
  line-height: 1.25;
  color: var(--paper);
}

.page-about .about-cta__body {
  margin: clamp(14px, 2vw, 18px) 0 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--muted);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: clamp(20px, 2.8vw, 28px) 0 0;
}

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

  .page-about .about-detail__item {
    grid-template-columns: 130px minmax(0, 1fr);
    align-items: baseline;
    gap: 16px;
  }

  .page-about .cadence-item {
    grid-template-columns: 190px minmax(0, 1fr) 150px;
    align-items: baseline;
    gap: 8px 22px;
  }

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

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

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

  .page-about .about-flow__rail {
    position: sticky;
    top: 32px;
    align-self: start;
  }

  .page-about .about-flow__list {
    grid-template-columns: 1fr;
    gap: 2px;
  }

  .page-about .about-flow__link {
    padding: 11px 14px;
  }

  .page-about .about-detail__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
    align-items: center;
    gap: clamp(32px, 5vw, 60px);
  }

  .page-about .about-detail__figure {
    align-self: stretch;
  }
}
<<<END>>>