.page-about {
  --about-toc-w: 236px;
  --about-col-gap: 64px;
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumb {
  padding: 24px 0 0;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: 34px 0 54px;
  border-bottom: 1px solid var(--line);
}

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(32px, 5.2vw, 66px);
  line-height: 1.03;
  letter-spacing: -0.02em;
  color: var(--white);
  margin: 18px 0 0;
  max-width: 18ch;
}

.page-about .about-hero__grid {
  margin-top: 32px;
  display: grid;
  gap: 32px;
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: 1.08fr 0.92fr;
    gap: 64px;
    align-items: end;
  }
}

.page-about .about-hero__lead {
  margin: 0;
  max-width: 40ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--text-dim);
}

@media (min-width: 700px) {
  .page-about .about-hero__lead {
    font-size: 17px;
  }
}

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

.page-about .about-fact {
  background: var(--ink-2);
  padding: 15px 16px 17px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}

.page-about .about-fact__num {
  display: block;
  font-family: var(--font-num);
  font-size: clamp(20px, 5.4vw, 26px);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.01em;
  color: var(--cyan);
  white-space: nowrap;
}

.page-about .about-fact__label {
  display: block;
  font-size: 12px;
  letter-spacing: .05em;
  line-height: 1.5;
  color: var(--slate);
}

/* ---------- 主体两栏 ---------- */
.page-about .about-body {
  display: grid;
  gap: 36px;
  padding-top: 48px;
  padding-bottom: 80px;
}

@media (min-width: 1000px) {
  .page-about .about-body {
    grid-template-columns: var(--about-toc-w) minmax(0, 1fr);
    gap: var(--about-col-gap);
    padding-top: 64px;
    padding-bottom: 104px;
  }
}

/* ---------- 左侧目录 ---------- */
.page-about .about-toc {
  align-self: start;
}

@media (min-width: 1000px) {
  .page-about .about-toc {
    position: sticky;
    top: calc(var(--header-h) + 28px);
  }
}

.page-about .about-toc__label {
  display: block;
  color: var(--slate);
}

.page-about .about-toc__list {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

@media (min-width: 1000px) {
  .page-about .about-toc__list {
    display: block;
    border-top: 1px solid var(--line);
  }
}

.page-about .about-toc__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 8px 12px;
  border: 1px solid var(--line-2);
  color: var(--text-dim);
  text-decoration: none;
  font-size: 13px;
  line-height: 1.5;
  transition: color .18s var(--ease), border-color .18s var(--ease), padding-left .18s var(--ease);
}

@media (min-width: 1000px) {
  .page-about .about-toc__link {
    border: 0;
    border-bottom: 1px solid var(--line-2);
    padding: 12px 2px;
    font-size: 14px;
  }
}

.page-about .about-toc__link:hover,
.page-about .about-toc__link:focus-visible {
  color: var(--white);
  border-color: var(--cyan);
}

@media (min-width: 1000px) {
  .page-about .about-toc__link:hover,
  .page-about .about-toc__link:focus-visible {
    padding-left: 10px;
  }
}

.page-about .about-toc__num {
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--slate);
  transition: color .18s var(--ease);
}

.page-about .about-toc__link:hover .about-toc__num,
.page-about .about-toc__link:focus-visible .about-toc__num {
  color: var(--cyan);
}

/* ---------- 章节通用 ---------- */
.page-about .about-sec {
  scroll-margin-top: calc(var(--header-h) + 20px);
  padding-top: 6px;
  margin-bottom: 72px;
}

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

.page-about .about-sec__head {
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 26px;
}

.page-about .about-sec__index {
  display: block;
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--slate);
  transition: color .2s var(--ease);
}

.page-about .about-sec.is-current .about-sec__index {
  color: var(--cyan);
}

.page-about .about-sec__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(23px, 3.2vw, 34px);
  line-height: 1.15;
  letter-spacing: -0.015em;
  color: var(--white);
  margin: 12px 0 0;
  max-width: 22ch;
}

.page-about .about-sec__lead {
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-dim);
  max-width: 58ch;
}

@media (min-width: 700px) {
  .page-about .about-sec__lead {
    font-size: 16px;
  }
}

/* ---------- 团队分工面板 ---------- */
.page-about .about-roles {
  display: grid;
  gap: 14px;
  margin-top: 24px;
}

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

.page-about .about-role {
  position: relative;
  background: var(--ink-2);
  border: 1px solid var(--line);
  padding: 22px 20px 26px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: border-color .18s var(--ease);
}

.page-about .about-role::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 3px;
  background: var(--cyan);
  transition: width .22s var(--ease);
}

.page-about .about-role:hover,
.page-about .about-role:focus-within {
  border-color: var(--cyan);
}

.page-about .about-role:hover::after,
.page-about .about-role:focus-within::after {
  width: 100%;
}

.page-about .about-role__count {
  margin: 0;
  font-family: var(--font-num);
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--slate);
}

.page-about .about-role__count .num {
  font-size: 26px;
  font-weight: 700;
  color: var(--cyan);
  letter-spacing: -0.01em;
  margin-right: 2px;
}

.page-about .about-role__name {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 20px;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-about .about-role__duty {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-dim);
  flex: 1;
}

.page-about .about-role__tags {
  list-style: none;
  margin: 0;
  padding: 12px 0 0;
  border-top: 1px solid var(--line-2);
  display: flex;
  flex-wrap: wrap;
  gap: 6px 14px;
}

.page-about .about-role__tags li {
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--slate);
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: 30px 0 0;
  border: 1px solid var(--line);
  background: var(--ink-2);
  overflow: hidden;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 3 / 2;
}

.page-about .about-figure--wide img {
  aspect-ratio: 7 / 4;
}

.page-about .about-figure__cap {
  padding: 12px 16px;
  font-size: 12px;
  letter-spacing: .04em;
  line-height: 1.7;
  color: var(--slate);
  border-top: 1px solid var(--line-2);
}

/* ---------- 四道工序 ---------- */
.page-about .about-steps {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  border-top: 1px solid var(--line);
}

@media (min-width: 860px) {
  .page-about .about-steps {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-about .about-step {
  padding: 20px 0 22px;
  border-bottom: 1px solid var(--line-2);
}

@media (min-width: 860px) {
  .page-about .about-step {
    border-bottom: 0;
    border-right: 1px solid var(--line-2);
    padding: 22px 20px 24px 0;
  }
  .page-about .about-step + .about-step {
    padding-left: 20px;
  }
  .page-about .about-step:last-child {
    border-right: 0;
    padding-right: 0;
  }
}

.page-about .about-step__idx {
  display: block;
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--cyan);
}

.page-about .about-step__name {
  margin: 10px 0 8px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 19px;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-about .about-step__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-dim);
}

.page-about .about-note {
  margin-top: 24px;
  padding: 16px 18px 18px;
  border-left: 3px solid var(--cyan);
  background: var(--ink-2);
}

.page-about .about-note p {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--text);
}

/* ---------- 六类联赛专题 ---------- */
.page-about .about-leagues {
  display: grid;
  gap: 14px;
  margin-top: 24px;
}

@media (min-width: 620px) {
  .page-about .about-leagues {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1100px) {
  .page-about .about-leagues {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-about .about-league {
  --acc: var(--teal);
  background: var(--ink-2);
  border-top: 2px solid var(--acc);
  padding: 20px 18px 22px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: background .18s var(--ease);
}

.page-about .about-league:nth-child(2n) {
  --acc: var(--violet);
}

.page-about .about-league:hover {
  background: #1A2352;
}

.page-about .about-league__name {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 17px;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-about .about-league__text {
  margin: 0;
  flex: 1;
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-dim);
}

.page-about .about-league__focus {
  margin: 0;
  padding-top: 10px;
  border-top: 1px solid var(--line-2);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--slate);
}

.page-about .about-leagues__foot {
  margin: 20px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-dim);
}

.page-about .about-link {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 242, 212, .4);
  transition: border-color .18s var(--ease);
}

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

/* ---------- 发展时间线 ---------- */
.page-about .about-tl {
  display: grid;
  gap: 30px;
  margin-top: 24px;
}

@media (min-width: 960px) {
  .page-about .about-tl {
    grid-template-columns: minmax(0, 1fr) 240px;
    gap: 48px;
    align-items: start;
  }
}

.page-about .about-tl__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-tl__item {
  position: relative;
  padding: 0 0 22px 30px;
}

.page-about .about-tl__item::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 24px;
  bottom: 0;
  width: 1px;
  background: var(--line);
}

.page-about .about-tl__item:last-child::before {
  display: none;
}

.page-about .about-tl__item::after {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 11px;
  height: 11px;
  background: var(--ink);
  border: 1px solid var(--cyan);
  transition: background .2s var(--ease);
}

.page-about .about-tl__item:has(.about-tl__node[open])::after {
  background: var(--cyan);
}

.page-about .about-tl__summary {
  list-style: none;
  cursor: pointer;
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
  padding: 2px 0 0;
  transition: color .18s var(--ease);
}

@media (min-width: 560px) {
  .page-about .about-tl__summary {
    grid-template-columns: 104px minmax(0, 1fr);
    gap: 2px 16px;
    align-items: baseline;
  }
}

.page-about .about-tl__summary::-webkit-details-marker {
  display: none;
}

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

.page-about .about-tl__season {
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--cyan);
}

.page-about .about-tl__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 18px;
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-about .about-tl__body p {
  margin: 8px 0 0;
  max-width: 54ch;
  font-size: 14px;
  line-height: 1.85;
  color: var(--text-dim);
}

@media (min-width: 560px) {
  .page-about .about-tl__body {
    padding-left: 120px;
  }
  .page-about .about-tl__body p {
    margin-top: 5px;
  }
}

.page-about .about-tl__visual {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--ink-2);
  overflow: hidden;
}

.page-about .about-tl__visual img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 5 / 7;
}

/* ---------- 合作与荣誉 ---------- */
.page-about .about-sec--band {
  background: linear-gradient(160deg, rgba(255, 91, 54, .1), rgba(10, 16, 38, 0) 74%);
  border-left: 3px solid var(--pulse);
  padding: 26px 22px 32px;
}

@media (min-width: 760px) {
  .page-about .about-sec--band {
    padding: 30px 30px 36px;
  }
}

.page-about .about-partner-grid {
  display: grid;
  gap: 14px;
  margin-top: 26px;
}

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

.page-about .about-partner {
  border: 1px solid var(--line);
  background: rgba(10, 16, 38, .62);
  padding: 18px 18px 20px;
}

.page-about .about-partner__num {
  display: block;
  font-family: var(--font-num);
  font-size: clamp(24px, 4.4vw, 32px);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.01em;
  color: var(--pulse);
}

.page-about .about-partner__label {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--white);
}

.page-about .about-partner p {
  margin: 10px 0 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--text-dim);
}

/* ---------- 纠错通道 ---------- */
.page-about .about-fix {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line-2);
  border: 1px solid var(--line);
}

@media (min-width: 760px) {
  .page-about .about-fix {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-about .about-fix li {
  background: var(--ink-2);
  padding: 16px 16px 18px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text);
}

.page-about .about-fix li .num {
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--cyan);
}

.page-about .about-fix__note {
  margin: 18px 0 22px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-dim);
}

/* ---------- 结尾去向 ---------- */
.page-about .about-next {
  background: var(--ink-2);
  border-top: 1px solid var(--line);
  padding: 52px 0 64px;
}

.page-about .about-next__title {
  margin: 0 0 22px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(22px, 3.4vw, 38px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--white);
}

.page-about .about-next__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line-2);
  border: 1px solid var(--line);
}

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

.page-about .about-next__link {
  display: grid;
  gap: 6px;
  padding: 22px 20px 24px;
  background: var(--ink-2);
  text-decoration: none;
  transition: background .18s var(--ease);
}

.page-about .about-next__link:hover,
.page-about .about-next__link:focus-visible {
  background: rgba(47, 242, 212, .07);
}

.page-about .about-next__num {
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--slate);
}

.page-about .about-next__name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 19px;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-about .about-next__desc {
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-dim);
}

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

@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    transition-duration: .01ms !important;
    animation-duration: .01ms !important;
  }
}