.page-about {
  --about-side: 15rem;
  --about-body-max: 34rem;
  background: var(--kk-ink);
  color: var(--kk-paper);
  font-family: var(--font-body);
  overflow-x: hidden;
  padding-bottom: clamp(2rem, 6vw, 4rem);
}

.page-about .about-crumb {
  padding-top: clamp(1rem, 3vw, 1.75rem);
}

.page-about .about-kicker {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--kk-mint);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(1.5rem, 4vw, 2.5rem) 0 clamp(2rem, 6vw, 3.75rem);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--kk-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--kk-line) 1px, transparent 1px);
  background-size: 64px 64px;
  opacity: 0.18;
  -webkit-mask-image: radial-gradient(ellipse at 78% 12%, #000 0%, transparent 68%);
  mask-image: radial-gradient(ellipse at 78% 12%, #000 0%, transparent 68%);
  pointer-events: none;
}

.page-about .about-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.5rem, 4vw, 3rem);
  align-items: end;
}

.page-about .about-hero__title {
  margin: 0.6rem 0 1.1rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.1rem, 7vw, 4.4rem);
  line-height: 0.98;
  letter-spacing: -0.012em;
  color: var(--kk-paper);
}

.page-about .about-hero__lead {
  max-width: var(--about-body-max);
  margin: 0;
  font-size: 1.0625rem;
  line-height: 1.72;
  color: var(--kk-paper-88);
}

.page-about .about-hero__aside {
  display: grid;
  gap: 1px;
  background: var(--kk-line);
  border: 1px solid var(--kk-line);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.page-about .about-stat {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  background: var(--kk-panel);
  padding: 1rem 1.15rem;
}

.page-about .about-stat__num {
  flex: none;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 1.85rem;
  font-weight: 700;
  line-height: 1;
  color: var(--kk-mint);
}

.page-about .about-stat__label {
  font-size: 0.875rem;
  line-height: 1.5;
  color: var(--kk-paper-76);
}

/* ---------- 章节导航 ---------- */

.page-about .about-toc {
  position: sticky;
  top: 0;
  z-index: 30;
  background: rgba(11, 43, 38, 0.94);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border-top: 1px solid var(--kk-line);
  border-bottom: 1px solid var(--kk-line);
}

.page-about .about-toc__inner {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 0.6rem 0;
}

.page-about .about-toc__label {
  flex: none;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.2em;
  color: var(--kk-paper-60);
}

.page-about .about-toc__list {
  display: flex;
  gap: 0.3rem;
  margin: 0;
  padding: 0 0.15rem;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}

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

.page-about .about-toc__link {
  display: block;
  white-space: nowrap;
  padding: 0.38rem 0.75rem;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 0.8125rem;
  color: var(--kk-paper-76);
  text-decoration: none;
  transition: color 0.2s var(--ease), background 0.2s var(--ease);
}

.page-about .about-toc__link:hover,
.page-about .about-toc__link:focus-visible {
  color: var(--kk-ink);
  background: var(--kk-mint);
  outline: none;
}

/* ---------- 章节骨架 ---------- */

.page-about .about-body {
  padding-top: clamp(0.5rem, 2vw, 1rem);
}

.page-about .chapter {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.1rem;
  padding: clamp(2rem, 5vw, 3.5rem) 0;
  border-top: 1px solid var(--kk-line);
  scroll-margin-top: 4.5rem;
}

.page-about .chapter__side {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.page-about .chapter__num {
  flex: none;
  display: inline-block;
  padding: 0.15rem 0.65rem;
  border: 1px solid var(--kk-line);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  color: var(--kk-clay);
}

.page-about .chapter__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.45rem, 3.2vw, 2.2rem);
  line-height: 1.06;
  letter-spacing: -0.008em;
  color: var(--kk-paper);
}

.page-about .chapter__main p {
  max-width: var(--about-body-max);
  margin: 0 0 1rem;
  font-size: 1rem;
  line-height: 1.75;
  color: var(--kk-paper-88);
}

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

.page-about .chapter__lead {
  font-size: 1.0625rem;
  color: var(--kk-paper);
}

.page-about .about-link {
  color: var(--kk-mint);
  text-decoration: none;
  border-bottom: 1px solid rgba(95, 242, 210, 0.4);
  padding-bottom: 1px;
}

.page-about .about-link:hover,
.page-about .about-link:focus-visible {
  border-bottom-color: var(--kk-mint);
}

/* ---------- 固定路线 ---------- */

.page-about .route__track {
  display: flex;
  gap: 0;
  margin: 1.5rem 0 1.1rem;
  padding: 0 0 0.75rem;
  list-style: none;
  overflow-x: auto;
  scroll-snap-type: x proximity;
}

.page-about .route__step {
  position: relative;
  flex: 1 0 13.5rem;
  padding: 0 1.4rem 0 0;
  scroll-snap-align: start;
}

.page-about .route__step:not(:last-child)::after {
  content: "";
  position: absolute;
  left: 2rem;
  right: 0.25rem;
  top: 1rem;
  height: 1px;
  background: linear-gradient(90deg, var(--kk-mint), var(--kk-line));
  opacity: 0.7;
}

.page-about .route__dot {
  position: relative;
  z-index: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  border: 1px solid var(--kk-mint);
  border-radius: 50%;
  background: var(--kk-ink);
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--kk-mint);
  transition: background 0.2s var(--ease), color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}

.page-about .route__step:hover .route__dot {
  background: var(--kk-mint);
  color: var(--kk-ink);
  box-shadow: 0 0 0 5px var(--kk-mint-soft);
}

.page-about .route__name {
  margin: 0.6rem 0 0.3rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.2rem;
  line-height: 1.1;
  color: var(--kk-paper);
}

.page-about .route__desc {
  margin: 0;
  max-width: 14rem;
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--kk-paper-76);
}

.page-about .route__branch {
  display: block;
  margin-top: 0.6rem;
  padding-left: 0.6rem;
  border-left: 2px solid var(--kk-violet);
  font-size: 0.78rem;
  line-height: 1.55;
  color: var(--kk-paper-60);
}

/* ---------- 配图 ---------- */

.page-about .about-figure {
  margin: 1.6rem 0 1.1rem;
  border: 1px solid var(--kk-line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--kk-panel);
  box-shadow: var(--shadow-card);
}

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

.page-about .about-figure figcaption {
  padding: 0.7rem 1rem;
  border-top: 1px solid var(--kk-line);
  font-size: 0.8125rem;
  line-height: 1.6;
  color: var(--kk-paper-60);
}

/* ---------- 团队构成 ---------- */

.page-about .team-split {
  margin: 1.5rem 0 1.4rem;
}

.page-about .team-split__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 2.5rem;
  grid-template-areas:
    "name num"
    "bar bar";
  gap: 0.35rem 0.75rem;
  align-items: center;
  padding: 0.85rem 0;
  border-top: 1px solid var(--kk-line);
}

.page-about .team-split__row:last-child {
  border-bottom: 1px solid var(--kk-line);
}

.page-about .team-split__name {
  grid-area: name;
  font-size: 0.9375rem;
  color: var(--kk-paper);
}

.page-about .team-split__num {
  grid-area: num;
  text-align: right;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 1rem;
  font-weight: 700;
  color: var(--kk-mint);
}

.page-about .team-split__bar {
  grid-area: bar;
  display: block;
  height: 6px;
  border-radius: 999px;
  background: rgba(242, 239, 230, 0.1);
  overflow: hidden;
}

.page-about .team-split__fill {
  display: block;
  height: 100%;
  border-radius: 999px;
  background: var(--kk-mint);
}

.page-about .team-split__fill--a { width: 46%; }
.page-about .team-split__fill--b { width: 31%; background: var(--kk-violet); }
.page-about .team-split__fill--c { width: 23%; background: var(--kk-track); }

/* ---------- 联赛网格 ---------- */

.page-about .league-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 1.4rem 0 1.2rem;
  padding: 0;
  list-style: none;
  background: var(--kk-line);
  border: 1px solid var(--kk-line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .league-grid__item {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  padding: 0.95rem 0.85rem;
  background: var(--kk-panel);
}

.page-about .league-grid__cat {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.05rem;
  line-height: 1.1;
  color: var(--kk-paper);
}

.page-about .league-grid__item:nth-child(3n + 2) .league-grid__cat { color: var(--kk-mint); }
.page-about .league-grid__item:nth-child(3n + 3) .league-grid__cat { color: var(--kk-clay); }

.page-about .league-grid__note {
  font-size: 0.78rem;
  line-height: 1.5;
  color: var(--kk-paper-60);
}

/* ---------- 版本演进 ---------- */

.page-about .versions {
  margin: 1.4rem 0 0;
  padding: 0;
  list-style: none;
}

.page-about .versions__item {
  display: grid;
  grid-template-columns: 2.75rem minmax(0, 1fr);
  gap: 0.9rem 1rem;
  padding: 1rem 0;
  border-top: 1px solid var(--kk-line);
  transition: transform 0.24s var(--ease), border-color 0.24s var(--ease);
}

.page-about .versions__item:hover {
  transform: translateX(4px);
  border-top-color: var(--kk-mint);
}

.page-about .versions__tag {
  align-self: start;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 2.75rem;
  border: 1px solid var(--kk-line);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--kk-paper-76);
  transition: color 0.24s var(--ease), background 0.24s var(--ease), border-color 0.24s var(--ease);
}

.page-about .versions__item:hover .versions__tag {
  background: var(--kk-mint);
  border-color: var(--kk-mint);
  color: var(--kk-ink);
}

.page-about .versions__name {
  margin: 0 0 0.3rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.15rem;
  line-height: 1.15;
  color: var(--kk-paper);
}

.page-about .versions__note {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.68;
  color: var(--kk-paper-76);
}

/* ---------- 合作与荣誉 ---------- */

.page-about .honor-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin: 1.4rem 0 1.2rem;
  background: var(--kk-line);
  border: 1px solid var(--kk-line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .honor {
  display: flex;
  align-items: baseline;
  gap: 0.85rem;
  padding: 1rem 1.1rem;
  background: var(--kk-panel);
}

.page-about .honor__num {
  flex: none;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 1.6rem;
  font-weight: 700;
  line-height: 1;
  color: var(--kk-mint);
}

.page-about .honor__label {
  font-size: 0.875rem;
  line-height: 1.55;
  color: var(--kk-paper-76);
}

/* ---------- 收尾 ---------- */

.page-about .about-cta {
  margin-top: clamp(1.5rem, 4vw, 3rem);
  padding: clamp(1.75rem, 5vw, 3.25rem) 0;
  background: var(--kk-panel);
  border-top: 1px solid var(--kk-line);
  border-bottom: 1px solid var(--kk-line);
}

.page-about .about-cta__title {
  margin: 0 0 0.75rem;
  max-width: 26rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.5rem, 4vw, 2.4rem);
  line-height: 1.06;
  color: var(--kk-paper);
}

.page-about .about-cta__text {
  max-width: var(--about-body-max);
  margin: 0 0 1.4rem;
  font-size: 1rem;
  line-height: 1.72;
  color: var(--kk-paper-88);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

/* ---------- 响应式 ---------- */

@media (min-width: 760px) {
  .page-about .league-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

  .page-about .honor {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }

  .page-about .team-split__row {
    grid-template-columns: 9rem minmax(0, 1fr) 2.5rem;
    grid-template-areas: "name bar num";
    gap: 0.9rem;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
  }

  .page-about .chapter {
    grid-template-columns: var(--about-side) minmax(0, 1fr);
    gap: clamp(1.5rem, 4vw, 3rem);
  }

  .page-about .chapter__side {
    display: block;
    position: sticky;
    top: 5rem;
    align-self: start;
  }

  .page-about .chapter__num {
    padding: 0;
    border: 0;
    border-radius: 0;
    font-size: clamp(2.4rem, 4.2vw, 3.6rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    line-height: 0.9;
    color: var(--kk-clay);
  }

  .page-about .chapter__title {
    margin-top: 0.75rem;
  }

  .page-about .route__step {
    flex: 1 0 12rem;
  }
}

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

@media (max-width: 560px) {
  .page-about .about-hero__title br {
    display: none;
  }

  .page-about .route__step {
    flex: 0 0 82%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .route__dot,
  .page-about .versions__item,
  .page-about .versions__tag,
  .page-about .about-toc__link {
    transition: none;
  }

  .page-about .versions__item:hover {
    transform: none;
  }
}
<<<END>>>