.page-about {
  --about-track-pad: clamp(1.2rem, 4vw, 2.4rem);
  background: var(--night);
  color: var(--chalk);
}

.page-about .breadcrumb {
  margin-top: clamp(1.1rem, 3vw, 1.8rem);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  padding: clamp(2rem, 5.5vw, 4rem) 0 clamp(2.6rem, 6vw, 4.6rem);
  background:
    radial-gradient(120% 90% at 90% 2%, rgba(55, 198, 255, .15), transparent 58%),
    radial-gradient(95% 80% at -5% 100%, rgba(29, 83, 52, .6), transparent 62%);
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(1.8rem, 4.5vw, 3.2rem);
  align-items: end;
}

.page-about .about-hero__eyebrow {
  margin: 0 0 .9rem;
  font-family: var(--font-label);
  font-size: .8125rem;
  font-weight: 500;
  letter-spacing: .16em;
  color: var(--blue);
}

.page-about .about-hero__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2rem, 5.6vw, 4rem);
  line-height: 1.06;
  letter-spacing: .01em;
  color: var(--chalk);
}

.page-about .about-hero__lede {
  margin: clamp(1rem, 2.4vw, 1.5rem) 0 0;
  max-width: 48ch;
  font-size: clamp(1rem, 1.6vw, 1.125rem);
  line-height: 1.8;
  color: var(--chalk);
  opacity: .86;
}

.page-about .about-hero__marks {
  display: grid;
  gap: 1.05rem;
  margin: 0;
  padding: clamp(1.2rem, 3vw, 1.6rem) 0 0;
  list-style: none;
  border-top: 1px solid var(--line-soft);
}

.page-about .about-hero__marks li {
  display: grid;
  gap: .15rem;
}

.page-about .about-mark__num {
  font-family: var(--font-numeric);
  font-weight: 600;
  font-size: clamp(1.5rem, 3.2vw, 2rem);
  letter-spacing: .02em;
  color: var(--yellow);
}

.page-about .about-mark__label {
  font-size: .875rem;
  line-height: 1.6;
  color: var(--mist);
}

/* ---------- 章节头 ---------- */

.page-about .about-chapter {
  max-width: 62ch;
  margin: 0 0 clamp(1.7rem, 4vw, 2.6rem);
}

.page-about .about-chapter__index {
  margin: 0 0 .65rem;
  font-family: var(--font-label);
  font-size: .8125rem;
  font-weight: 500;
  letter-spacing: .16em;
  color: var(--blue);
}

.page-about .about-chapter__title {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(1.45rem, 3.2vw, 2.2rem);
  line-height: 1.3;
  color: var(--chalk);
}

.page-about .about-chapter__lede {
  margin: .95rem 0 0;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 图片容器 ---------- */

.page-about .media-frame {
  display: flex;
  flex-direction: column;
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--night);
  box-shadow: var(--shadow-card);
}

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

.page-about .media-frame--cut {
  border-radius: 22px 22px 22px 88px;
}

.page-about .media-frame__caption {
  padding: .75rem clamp(1rem, 2.4vw, 1.35rem) .95rem;
  font-size: .8125rem;
  line-height: 1.65;
  color: var(--mist);
  background: rgba(10, 23, 18, .92);
}

/* ---------- 起点 ---------- */

.page-about .about-origin {
  padding: clamp(2.6rem, 6.5vw, 4.8rem) 0;
  background: var(--turf);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .about-origin__body {
  display: grid;
  gap: clamp(1.6rem, 4vw, 2.6rem);
  align-items: start;
}

.page-about .about-origin__text p {
  margin: 0 0 1rem;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--chalk);
  opacity: .86;
}

.page-about .about-origin__text p:first-child {
  font-family: var(--font-serif);
  font-size: clamp(1.0625rem, 1.9vw, 1.2rem);
  line-height: 1.78;
  opacity: 1;
}

.page-about .about-origin__text p:last-child {
  margin-bottom: 0;
  padding-left: 1rem;
  border-left: 3px solid var(--yellow);
  opacity: 1;
}

/* ---------- 团队 ---------- */

.page-about .about-team {
  padding: clamp(2.6rem, 6.5vw, 4.8rem) 0;
  background: var(--paper);
  color: var(--ink);
}

.page-about .about-team .about-chapter__index {
  color: var(--grass);
}

.page-about .about-team .about-chapter__title {
  color: var(--ink);
}

.page-about .about-team .about-chapter__lede {
  color: rgba(16, 22, 19, .74);
}

.page-about .about-team__grid {
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.4rem);
  align-items: start;
}

.page-about .about-team__cards {
  display: grid;
  gap: .9rem;
}

.page-about .about-role {
  padding: clamp(1.05rem, 2.6vw, 1.45rem);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, .58);
  border: 1px solid rgba(29, 83, 52, .22);
  transition: transform .28s var(--ease), border-color .28s var(--ease), box-shadow .28s var(--ease);
}

.page-about .about-role:hover {
  transform: translateY(-4px);
  border-color: var(--blue);
  box-shadow: 0 18px 32px -26px rgba(16, 22, 19, .9);
}

.page-about .about-role__tag {
  display: inline-block;
  margin: 0 0 .55rem;
  padding: .2rem .7rem;
  border-radius: var(--pill);
  background: var(--grass);
  color: var(--chalk);
  font-family: var(--font-label);
  font-size: .75rem;
  font-weight: 500;
  letter-spacing: .08em;
}

.page-about .about-role__title {
  margin: 0 0 .5rem;
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--ink);
}

.page-about .about-role p {
  margin: 0;
  font-size: .9rem;
  line-height: 1.78;
  color: rgba(16, 22, 19, .76);
}

.page-about .about-role__meta {
  margin-top: .7rem !important;
  padding-top: .65rem;
  border-top: 1px dashed rgba(29, 83, 52, .3);
  font-family: var(--font-numeric);
  font-size: .78rem !important;
  letter-spacing: .01em;
  color: var(--grass) !important;
}

.page-about .about-team__figure {
  border-color: rgba(29, 83, 52, .28);
}

.page-about .about-team__figure .media-frame__caption {
  color: rgba(16, 22, 19, .7);
  background: rgba(255, 255, 255, .68);
}

.page-about .about-team__note {
  margin: clamp(1.4rem, 3.2vw, 2rem) 0 0;
  padding: clamp(1rem, 2.6vw, 1.35rem) clamp(1.1rem, 3vw, 1.6rem);
  border-left: 4px solid var(--red);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  background: rgba(255, 59, 87, .09);
  font-size: .95rem;
  line-height: 1.8;
  color: var(--ink);
}

/* ---------- 赛事分级 ---------- */

.page-about .about-events {
  padding: clamp(2.6rem, 6.5vw, 4.8rem) 0;
  background: var(--night);
}

.page-about .about-tiers {
  display: grid;
  gap: 1.1rem;
}

.page-about .about-tier {
  padding: clamp(1.15rem, 3vw, 1.7rem);
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  background: linear-gradient(158deg, rgba(29, 83, 52, .52), rgba(10, 23, 18, .72));
  transition: border-color .28s var(--ease), transform .28s var(--ease);
}

.page-about .about-tier:hover {
  transform: translateY(-4px);
  border-color: var(--blue);
}

.page-about .about-tier--full {
  border-color: rgba(255, 210, 63, .42);
  background: linear-gradient(158deg, rgba(255, 210, 63, .1), rgba(10, 23, 18, .78));
}

.page-about .about-tier__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .7rem;
  margin-bottom: .85rem;
}

.page-about .about-tier__head .capsule {
  font-family: var(--font-label);
  font-size: .78rem;
  font-weight: 500;
  letter-spacing: .1em;
}

.page-about .about-tier__count {
  font-family: var(--font-numeric);
  font-size: .82rem;
  letter-spacing: .02em;
  color: var(--mist);
}

.page-about .about-tier__desc {
  margin: 0;
  font-size: .95rem;
  line-height: 1.8;
  color: var(--chalk);
  opacity: .88;
}

.page-about .about-tier__list {
  display: grid;
  gap: .6rem;
  margin: 1rem 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-tier__list li {
  position: relative;
  padding-left: 1.15rem;
  font-size: .9rem;
  line-height: 1.75;
  color: var(--chalk);
  opacity: .82;
}

.page-about .about-tier__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .68em;
  width: .42rem;
  height: .42rem;
  border-radius: 50%;
  background: var(--blue);
}

.page-about .about-tier--full .about-tier__list li::before {
  background: var(--yellow);
}

/* ---------- 球迷生态 ---------- */

.page-about .about-fans {
  padding: clamp(2.6rem, 6.5vw, 4.8rem) 0;
  background: var(--turf);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .about-fans__body {
  display: grid;
  gap: clamp(1.6rem, 4vw, 2.6rem);
  align-items: start;
}

.page-about .about-fans__text p {
  margin: 0 0 1rem;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--chalk);
  opacity: .86;
}

.page-about .about-fans__stats {
  display: grid;
  gap: .85rem;
  margin: clamp(1.2rem, 3vw, 1.6rem) 0 0;
  padding: clamp(1rem, 2.6vw, 1.3rem) 0 0;
  list-style: none;
  border-top: 1px solid var(--line-soft);
}

.page-about .about-fans__stats li {
  display: grid;
  gap: .1rem;
}

.page-about .about-fans__num {
  font-family: var(--font-numeric);
  font-weight: 600;
  font-size: clamp(1.25rem, 2.6vw, 1.6rem);
  letter-spacing: .02em;
  color: var(--yellow);
}

.page-about .about-fans__label {
  font-size: .875rem;
  line-height: 1.6;
  color: var(--mist);
}

/* ---------- 版本时间线 ---------- */

.page-about .about-timeline {
  padding: clamp(2.6rem, 6.5vw, 4.8rem) 0;
  background: var(--night);
}

.page-about .about-track {
  position: relative;
  display: grid;
  gap: clamp(.9rem, 2.4vw, 1.3rem);
  margin: 0;
  padding: 0 0 0 var(--about-track-pad);
  list-style: none;
}

.page-about .about-track::before {
  content: "";
  position: absolute;
  left: 0;
  top: .7rem;
  bottom: .7rem;
  width: 2px;
  border-radius: var(--pill);
  background: linear-gradient(180deg, var(--yellow), var(--grass) 48%, var(--blue));
  opacity: .6;
}

.page-about .about-track__item {
  position: relative;
}

.page-about .about-track__item::before {
  content: "";
  position: absolute;
  left: calc(-1 * var(--about-track-pad) - 5px);
  top: .95rem;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--night);
  border: 2px solid var(--yellow);
}

.page-about .about-track__node {
  display: block;
}

.page-about .about-track__summary {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: .7rem;
  padding: clamp(.8rem, 2.2vw, 1.05rem) clamp(1rem, 2.6vw, 1.35rem);
  border-radius: var(--radius-md);
  border: 1px solid var(--line);
  background: rgba(18, 50, 31, .55);
  cursor: pointer;
  list-style: none;
  transition: border-color .25s var(--ease), background-color .25s var(--ease);
}

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

.page-about .about-track__summary::marker {
  content: "";
}

.page-about .about-track__summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-numeric);
  font-size: 1.05rem;
  line-height: 1;
  color: var(--mist);
}

.page-about .about-track__summary:hover {
  border-color: var(--blue);
}

.page-about .about-track__node[open] .about-track__summary {
  border-color: rgba(255, 210, 63, .5);
  border-bottom-left-radius: 0;
  border-bottom-right-radius: 0;
}

.page-about .about-track__node[open] .about-track__summary::after {
  content: "–";
  color: var(--yellow);
}

.page-about .about-track__version {
  font-family: var(--font-numeric);
  font-weight: 600;
  font-size: .9rem;
  letter-spacing: .04em;
  color: var(--yellow);
}

.page-about .about-track__name {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(1rem, 2vw, 1.125rem);
  color: var(--chalk);
}

.page-about .about-track__body {
  padding: clamp(.85rem, 2.4vw, 1.15rem) clamp(1rem, 2.6vw, 1.35rem) clamp(1rem, 2.6vw, 1.3rem);
  border: 1px solid rgba(255, 210, 63, .3);
  border-top: 0;
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  background: rgba(10, 23, 18, .72);
}

.page-about .about-track__body p {
  margin: 0;
  font-size: .95rem;
  line-height: 1.82;
  color: var(--mist);
}

/* ---------- 接下来三年 ---------- */

.page-about .about-next {
  padding: clamp(2.6rem, 6.5vw, 5rem) 0 clamp(3rem, 8vw, 5.5rem);
  background: linear-gradient(180deg, var(--night) 0%, var(--turf) 100%);
}

.page-about .about-next__list {
  display: grid;
  gap: clamp(1.2rem, 3.4vw, 1.9rem);
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-next__item {
  padding-left: clamp(2.6rem, 7vw, 3.4rem);
  position: relative;
}

.page-about .about-next__num {
  position: absolute;
  left: 0;
  top: .1rem;
  font-family: var(--font-numeric);
  font-weight: 600;
  font-size: clamp(1.5rem, 3.4vw, 2.1rem);
  letter-spacing: .02em;
  color: rgba(55, 198, 255, .55);
}

.page-about .about-next__title {
  margin: 0 0 .5rem;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(1.05rem, 2.2vw, 1.3rem);
  line-height: 1.4;
  color: var(--chalk);
}

.page-about .about-next__item p {
  margin: 0;
  max-width: 58ch;
  font-size: .95rem;
  line-height: 1.85;
  color: var(--mist);
}

.page-about .about-next__cta {
  display: flex;
  flex-wrap: wrap;
  gap: .8rem;
  margin-top: clamp(1.8rem, 4.5vw, 2.8rem);
}

.page-about .about-next__more {
  margin: 1.1rem 0 0;
  font-size: .9rem;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .about-next__more a {
  color: var(--blue);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .about-next__more a:hover {
  color: var(--yellow);
}

/* ---------- 断点 ---------- */

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

  .page-about .about-hero__marks {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.2rem;
  }
}

@media (min-width: 780px) {
  .page-about .about-tiers {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: clamp(1.2rem, 3vw, 1.8rem);
  }

  .page-about .about-fans__stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.2rem;
  }
}

@media (min-width: 960px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, .85fr);
  }

  .page-about .about-hero__marks {
    grid-template-columns: minmax(0, 1fr);
    padding: 0 0 0 clamp(1.2rem, 3vw, 1.9rem);
    border-top: 0;
    border-left: 1px solid var(--line-soft);
  }

  .page-about .about-origin__body {
    grid-template-columns: minmax(0, 1fr) minmax(0, .95fr);
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, .82fr);
  }

  .page-about .about-fans__body {
    grid-template-columns: minmax(0, .82fr) minmax(0, 1.08fr);
  }

  .page-about .about-next__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: clamp(1.6rem, 4vw, 3rem);
  }
}

@media (min-width: 1180px) {
  .page-about .about-hero__grid {
    gap: 4rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-role,
  .page-about .about-tier,
  .page-about .about-track__summary {
    transition: none;
  }

  .page-about .about-role:hover,
  .page-about .about-tier:hover {
    transform: none;
  }
}
</main>