.page-about {
  --about-index-width: 208px;
  --about-accent: var(--cyan);
  padding-bottom: clamp(3rem, 8vw, 6rem);
}

/* 面包屑 */
.page-about .breadcrumbs {
  padding-top: 1.5rem;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.06em;
  color: var(--mist);
}

.page-about .breadcrumbs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .breadcrumbs__item + .breadcrumbs__item::before {
  content: "/";
  margin-right: 0.45rem;
  color: var(--line);
}

.page-about .breadcrumbs a {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

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

/* 首屏 */
.page-about .about-hero {
  position: relative;
  padding: 2.5rem 0 2.75rem;
  border-bottom: 1px solid var(--line);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: -1px;
  width: min(38%, 320px);
  height: 3px;
  background: var(--cyan);
}

.page-about .about-hero__kicker {
  margin: 0 0 0.9rem;
  font-size: 0.74rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-about .about-hero__title {
  margin: 0 0 1.15rem;
  max-width: 20ch;
  font-family: var(--font-display);
  font-size: clamp(2rem, 7.4vw, 4.35rem);
  font-weight: 700;
  line-height: 0.98;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-about .about-hero__lede {
  max-width: 56ch;
  margin: 0;
  font-size: 1.02rem;
  line-height: 1.85;
  color: var(--mist);
}

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

.page-about .about-hero__stat {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  padding: 0.95rem 1rem;
  background: var(--panel);
}

.page-about .about-hero__num {
  font-size: 1.65rem;
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
  letter-spacing: -0.01em;
}

.page-about .about-hero__label {
  font-size: 0.82rem;
  color: var(--mist);
  letter-spacing: 0.02em;
}

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

/* 正文双栏 */
.page-about .about-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 2rem;
  padding-top: 2.75rem;
}

@media (min-width: 940px) {
  .page-about .about-body {
    grid-template-columns: var(--about-index-width) minmax(0, 1fr);
    gap: 3.5rem;
  }
}

/* 阶段索引 */
.page-about .stage-index {
  min-width: 0;
}

.page-about .stage-index__title {
  margin: 0 0 0.75rem;
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-about .stage-index__list {
  display: flex;
  gap: 0.5rem;
  margin: 0;
  padding: 0 0 0.6rem;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .stage-index__item {
  flex: 0 0 auto;
}

.page-about .stage-index__link {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  padding: 0.4rem 0.7rem;
  border: 1px solid var(--line);
  font-size: 0.8rem;
  line-height: 1.4;
  color: var(--mist);
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease), background 0.18s var(--ease);
}

.page-about .stage-index__link .mono {
  color: var(--cyan);
  font-size: 0.72rem;
}

.page-about .stage-index__link:hover,
.page-about .stage-index__link:focus-visible {
  color: var(--white);
  border-color: var(--cyan);
  background: rgba(41, 242, 192, 0.06);
  outline: none;
}

@media (min-width: 940px) {
  .page-about .stage-index {
    position: sticky;
    top: 5.5rem;
    align-self: start;
    max-height: calc(100vh - 7rem);
    overflow-y: auto;
  }

  .page-about .stage-index__list {
    flex-direction: column;
    gap: 0.4rem;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .stage-index__link {
    white-space: normal;
    border-color: transparent;
    border-left: 2px solid var(--line);
    padding: 0.45rem 0.5rem 0.45rem 0.75rem;
  }
}

/* 阶段区块 */
.page-about .stage {
  position: relative;
  padding: 2.2rem 0 2.9rem;
  border-top: 1px solid var(--line);
  scroll-margin-top: 5rem;
}

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

.page-about .stage__watermark {
  position: absolute;
  top: 0.4rem;
  right: 0;
  z-index: 0;
  font-family: var(--font-display);
  font-size: clamp(3.4rem, 12vw, 7.5rem);
  font-weight: 700;
  line-height: 0.8;
  letter-spacing: -0.03em;
  color: var(--line);
  opacity: 0.6;
  pointer-events: none;
  user-select: none;
}

.page-about .stage > :not(.stage__watermark) {
  position: relative;
  z-index: 1;
}

.page-about .stage:first-child .stage__watermark {
  top: 0;
}

.page-about .stage__meta {
  margin: 0 0 0.7rem;
  font-size: 0.73rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-about .stage__title {
  margin: 0 0 1rem;
  font-family: var(--font-body);
  font-weight: 800;
  font-size: clamp(1.42rem, 4.2vw, 2.05rem);
  line-height: 1.28;
  letter-spacing: -0.005em;
  color: var(--white);
}

.page-about .stage p {
  max-width: 62ch;
  margin: 0 0 1rem;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--mist);
}

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

@media (min-width: 940px) {
  .page-about .stage {
    padding: 2.8rem 0 3.6rem;
  }
}

/* 阶段 04 图文分栏 */
@media (min-width: 880px) {
  .page-about .stage--split {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 320px);
    gap: 2.5rem;
    align-items: start;
  }

  .page-about .stage--split .stage__watermark {
    right: 340px;
  }
}

.page-about .stage--split .stage__column {
  min-width: 0;
}

.page-about .stage__figure {
  margin: 1.5rem 0 0;
}

@media (min-width: 880px) {
  .page-about .stage--split .stage__figure {
    margin-top: 2.4rem;
  }
}

.page-about .stage__figure--band {
  margin-top: 2rem;
}

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

/* 栏目矩阵 */
.page-about .matrix {
  display: grid;
  gap: 0.55rem;
  margin: 1.5rem 0 0;
  padding: 0;
  list-style: none;
}

.page-about .matrix__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.6rem;
  padding: 0.85rem 0.95rem 0.85rem 1rem;
  background: var(--panel);
  border: 1px solid var(--line);
  border-left: 3px solid var(--cat-accent, var(--cyan));
  transition: border-color 0.18s var(--ease), transform 0.18s var(--ease);
}

.page-about .matrix__row:nth-child(1) { --cat-accent: var(--cyan); }
.page-about .matrix__row:nth-child(2) { --cat-accent: var(--orange); }
.page-about .matrix__row:nth-child(3) { --cat-accent: var(--yellow); }
.page-about .matrix__row:nth-child(4) { --cat-accent: var(--cyan); }
.page-about .matrix__row:nth-child(5) { --cat-accent: var(--orange); }
.page-about .matrix__row:nth-child(6) { --cat-accent: var(--yellow); }

.page-about .matrix__row:hover,
.page-about .matrix__row:focus-within {
  border-color: var(--cat-accent, var(--cyan));
  border-left-color: var(--cat-accent, var(--cyan));
  transform: translateX(3px);
}

.page-about .matrix__cat {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.55rem;
}

.page-about .matrix__code {
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  color: var(--cat-accent, var(--cyan));
}

.page-about .matrix__cat h3 {
  margin: 0;
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--white);
}

.page-about .matrix__count {
  font-size: 0.74rem;
  color: var(--mist);
}

.page-about .matrix__leagues {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.page-about .league-pill {
  display: inline-block;
  padding: 0.24rem 0.6rem;
  border: 1px solid var(--line);
  background: rgba(41, 242, 192, 0.04);
  font-size: 0.82rem;
  color: var(--white);
}

@media (min-width: 720px) {
  .page-about .matrix__row {
    grid-template-columns: 220px minmax(0, 1fr);
    align-items: center;
    gap: 1.25rem;
  }
}

/* 团队切换 */
.page-about .team-switch {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin: 1.5rem 0 1rem;
}

.page-about .team-switch__btn {
  padding: 0.4rem 0.8rem;
  border: 1px solid var(--line);
  background: transparent;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.02em;
  color: var(--mist);
  cursor: pointer;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease), background 0.18s var(--ease);
}

.page-about .team-switch__btn:hover,
.page-about .team-switch__btn:focus-visible {
  border-color: var(--cyan);
  color: var(--white);
  outline: none;
}

.page-about .team-switch__btn.is-active {
  border-color: var(--cyan);
  background: var(--cyan);
  color: var(--bg);
  font-weight: 700;
}

.page-about .team-roster {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.7rem;
}

@media (min-width: 640px) {
  .page-about .team-roster {
    grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  }
}

.page-about .team-card {
  padding: 1rem 1.05rem 1.1rem;
  background: var(--panel);
  border: 1px solid var(--line);
  border-top: 2px solid var(--cyan);
}

.page-about .team-card:nth-child(1) { border-top-color: var(--cyan); }
.page-about .team-card:nth-child(2) { border-top-color: var(--yellow); }
.page-about .team-card:nth-child(3) { border-top-color: var(--orange); }
.page-about .team-card:nth-child(4) { border-top-color: var(--mist); }

.page-about .team-card[hidden],
.page-about .team-card.is-filtered-out {
  display: none;
}

.page-about .team-card__num {
  margin: 0 0 0.4rem;
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1;
  color: var(--white);
}

.page-about .team-card__title {
  margin: 0 0 0.5rem;
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--white);
}

.page-about .team-card__desc {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--mist);
}

/* 三期翻新 */
.page-about .phases {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.75rem;
  margin: 1.5rem 0 1.5rem;
  padding: 0;
  list-style: none;
}

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

.page-about .phase {
  position: relative;
  padding: 1.15rem 1.05rem 1.3rem;
  background:
    linear-gradient(158deg, rgba(41, 242, 192, 0.07), transparent 62%),
    var(--panel);
  border: 1px solid var(--line);
}

.page-about .phase::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 42%;
  height: 2px;
  background: var(--cyan);
  transform: skewX(calc(-1 * var(--slant)));
  transform-origin: left bottom;
}

.page-about .phase__num {
  margin: 0 0 0.55rem;
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--cyan);
}

.page-about .phase__title {
  margin: 0 0 0.6rem;
  font-size: 1.08rem;
  font-weight: 700;
  color: var(--white);
}

.page-about .phase__text {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.75;
  color: var(--mist);
}

/* 荣誉 */
.page-about .honours__list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.85rem;
  margin: 1.5rem 0 0;
  padding: 0;
  list-style: none;
}

@media (min-width: 800px) {
  .page-about .honours__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
  }
}

.page-about .honour {
  padding: 1.3rem 1.2rem 1.4rem;
  background: var(--brown);
  border: 1px solid var(--line);
  border-left: 3px solid var(--yellow);
}

.page-about .honour__tag {
  margin: 0 0 0.5rem;
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--yellow);
}

.page-about .honour__title {
  margin: 0 0 0.6rem;
  font-size: 1.08rem;
  font-weight: 700;
  line-height: 1.4;
  color: var(--cream);
}

.page-about .honour__text {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--mist);
}

/* 联赛带 */
.page-about .league-strip {
  margin-top: clamp(2.5rem, 6vw, 4rem);
}

/* 下一步 */
.page-about .about-next {
  margin-top: clamp(2.5rem, 6vw, 4rem);
  padding-top: 1.75rem;
  border-top: 1px solid var(--line);
}

.page-about .about-next__title {
  margin: 0 0 1.1rem;
  font-size: 1.12rem;
  font-weight: 700;
  color: var(--white);
}

.page-about .about-next__list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.75rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

@media (min-width: 720px) {
  .page-about .about-next__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1080px) {
  .page-about .about-next__list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-about .about-next__item {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  padding: 0.95rem 1rem;
  background: var(--panel);
  border: 1px solid var(--line);
  border-bottom: 3px solid var(--line);
  transition: border-color 0.18s var(--ease), transform 0.18s var(--ease);
}

.page-about .about-next__item:hover,
.page-about .about-next__item:focus-within {
  border-bottom-color: var(--cyan);
  transform: translateY(-4px);
}

.page-about .about-next__link {
  font-size: 1rem;
  font-weight: 700;
  color: var(--white);
  text-decoration: none;
}

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

.page-about .about-next__desc {
  font-size: 0.85rem;
  line-height: 1.7;
  color: var(--mist);
}

/* 窄屏溢出保护 */
@media (max-width: 480px) {
  .page-about .about-hero__title {
    font-size: clamp(1.75rem, 9vw, 2.4rem);
    max-width: none;
  }

  .page-about .stage__watermark {
    font-size: 3.2rem;
  }

  .page-about .matrix__row {
    padding-left: 0.85rem;
  }
}
<<<END>>>