.page-about {
  --about-tick: 62px;
  --about-soft: rgba(11, 13, 15, .72);
  background: var(--warm);
  color: var(--carbon);
  overflow-x: hidden;
}

.page-about .breadcrumb {
  padding-top: 18px;
}

.page-about .eyebrow {
  font-size: 12px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--clay);
  margin: 0;
}

.page-about h2 {
  font-size: clamp(22px, 5.4vw, 34px);
  line-height: 1.24;
  font-weight: 900;
  letter-spacing: -.02em;
  margin: 10px 0 0;
}

.page-about h3 {
  font-size: 17px;
  font-weight: 800;
  letter-spacing: -.01em;
  margin: 0;
}

/* ---------- 首屏：错位色块 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  margin-top: 14px;
  padding: 46px 0 54px;
  background: var(--carbon);
  background-image:
    repeating-linear-gradient(90deg, rgba(244, 240, 232, .045) 0 1px, transparent 1px 84px),
    repeating-linear-gradient(0deg, rgba(244, 240, 232, .045) 0 1px, transparent 1px 84px);
  color: var(--warm);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  z-index: -1;
  top: -32%;
  right: -18%;
  width: min(640px, 92%);
  height: 176%;
  background: linear-gradient(164deg, var(--red-deep) 0%, var(--red) 48%, var(--clay) 100%);
  clip-path: polygon(34% 0, 100% 0, 100% 100%, 0 100%);
  transform: rotate(-4deg);
  opacity: .94;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 6px;
  background: linear-gradient(90deg, var(--red) 0%, var(--volt) 54%, var(--blue) 100%);
}

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

.page-about .about-hero .eyebrow {
  color: var(--volt);
}

.page-about .about-hero h1 {
  font-size: clamp(28px, 7.4vw, 54px);
  line-height: 1.12;
  font-weight: 900;
  letter-spacing: -.025em;
  margin: 14px 0 0;
  max-width: 20ch;
}

.page-about .about-hero .lead {
  margin: 18px 0 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.78;
  color: rgba(244, 240, 232, .82);
}

.page-about .about-hero__facts {
  display: grid;
  gap: 1px;
  margin: 32px 0 0;
  padding: 0;
  list-style: none;
  background: var(--line-dark);
  border: 1px solid var(--line-dark);
}

.page-about .about-hero__facts li {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 14px 16px;
  background: var(--carbon-soft);
  font-size: 13px;
  color: rgba(244, 240, 232, .68);
}

.page-about .about-hero__num {
  font-size: 26px;
  font-weight: 600;
  line-height: 1.1;
  color: var(--volt);
}

/* ---------- 分区节奏 ---------- */
.page-about .section {
  padding: 52px 0;
}

.page-about .about-zone--paper {
  background: var(--warm);
}

.page-about .about-zone--cream {
  background: var(--cream);
}

.page-about .about-zone--night {
  background: var(--carbon);
  color: var(--warm);
}

.page-about .about-zone--night .eyebrow {
  color: var(--volt);
}

.page-about .about-intro {
  margin: 16px 0 0;
  max-width: 68ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--stone);
}

.page-about .about-zone--night .about-intro {
  color: rgba(244, 240, 232, .78);
}

/* ---------- 双栏 ---------- */
.page-about .about-split {
  display: grid;
  gap: 26px;
  margin-top: 24px;
}

.page-about .about-split__main p {
  margin: 0 0 15px;
  font-size: 15.5px;
  line-height: 1.82;
  color: var(--soft, var(--stone));
}

.page-about .about-zone--night .about-split__main p {
  color: rgba(244, 240, 232, .8);
}

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

.page-about .about-split__aside {
  padding: 4px 0 4px 18px;
  border-left: 3px solid var(--clay);
}

.page-about .about-split__aside--volt {
  border-left-color: var(--volt);
}

.page-about .about-split__aside--clay {
  border-left-color: var(--clay);
}

.page-about .about-aside__label {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--clay);
}

.page-about .about-zone--night .about-aside__label {
  color: var(--volt);
}

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

.page-about .about-aside__list li {
  padding: 8px 0;
  font-size: 14px;
  line-height: 1.7;
  border-top: 1px solid var(--line-light);
  color: var(--stone);
}

.page-about .about-zone--night .about-aside__list li {
  border-top-color: var(--line-dark);
  color: rgba(244, 240, 232, .8);
}

.page-about .about-aside__list li:first-child {
  border-top: none;
}

/* ---------- 图文 ---------- */
.page-about .about-media-split {
  display: grid;
  gap: 22px;
  margin-top: 26px;
}

.page-about .about-media-split__figure,
.page-about .about-season-figure,
.page-about .about-team-figure {
  margin: 0;
}

.page-about .about-media-split__text p {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--stone);
}

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

.page-about .about-season-figure {
  margin-top: 30px;
}

.page-about .about-team-figure {
  margin-top: 30px;
}

/* ---------- 字段表 ---------- */
.page-about .field-list {
  margin: 30px 0 0;
  padding: 0;
}

.page-about .field-list__row {
  display: grid;
  gap: 6px;
  padding: 15px 0;
  border-top: 1px solid var(--line-light);
}

.page-about .field-list dt {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .04em;
  color: var(--blue);
}

.page-about .field-list dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--stone);
}

/* ---------- 赛季阶梯 ---------- */
.page-about .ladder {
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .ladder__item {
  position: relative;
  display: grid;
  grid-template-columns: var(--about-tick) minmax(0, 1fr);
  gap: 6px 16px;
  padding: 20px 0 20px 18px;
  border-top: 1px solid var(--line-dark);
}

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

.page-about .ladder__tick {
  position: relative;
  padding-top: 3px;
  font-size: 13px;
  letter-spacing: .05em;
  color: var(--clay);
}

.page-about .ladder__tick::before {
  content: "";
  position: absolute;
  left: -18px;
  top: 7px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--clay);
}

.page-about .ladder__item:nth-child(2) .ladder__tick::before {
  background: var(--blue);
}

.page-about .ladder__item:nth-child(3) .ladder__tick::before {
  background: var(--volt);
}

.page-about .ladder__item:nth-child(4) .ladder__tick::before {
  background: var(--red);
}

.page-about .ladder__title {
  color: var(--warm);
}

.page-about .ladder__item p {
  margin: 8px 0 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: rgba(244, 240, 232, .78);
}

/* ---------- 分段切换 ---------- */
.page-about .about-tabs {
  margin-top: 36px;
}

.page-about .tabs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  border-bottom: 1px solid var(--line-dark);
}

.page-about .tabs__tab {
  appearance: none;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .04em;
  color: rgba(244, 240, 232, .66);
  background: transparent;
  border: 1px solid transparent;
  padding: 10px 13px;
  cursor: pointer;
  transition: color .18s ease, background-color .18s ease;
}

.page-about .tabs__tab:hover {
  color: var(--warm);
}

.page-about .tabs__tab[aria-selected="true"] {
  color: var(--carbon);
  background: var(--volt);
  border-color: var(--volt);
}

.page-about .tabs__panel {
  padding: 22px 0 0;
  max-width: 72ch;
}

.page-about .tabs__panel p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(244, 240, 232, .8);
}

.page-about .about-tabs__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 22px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
  font-size: 13px;
  color: rgba(244, 240, 232, .62);
}

.page-about .about-tabs__meta .mono {
  color: var(--volt);
  font-weight: 600;
}

/* ---------- 团队 ---------- */
.page-about .crew {
  display: grid;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .crew__item {
  padding: 18px 0;
  border-top: 1px solid var(--line-light);
}

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

.page-about .crew__idx {
  display: block;
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--clay);
  margin-bottom: 6px;
}

.page-about .crew__desc {
  margin: 8px 0 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--stone);
}

.page-about .rhythm {
  display: grid;
  gap: 1px;
  margin-top: 30px;
  background: var(--line-light);
  border: 1px solid var(--line-light);
}

.page-about .rhythm__cell {
  background: var(--warm);
  padding: 16px 18px;
}

.page-about .rhythm__key {
  margin: 0;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--red);
}

.page-about .rhythm__val {
  margin: 8px 0 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--stone);
}

/* ---------- 历程折叠 ---------- */
.page-about .milestones {
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .milestone-wrap {
  border-top: 1px solid var(--line-light);
}

.page-about .milestone-wrap:last-child {
  border-bottom: 1px solid var(--line-light);
}

.page-about .milestone[open] {
  background: linear-gradient(90deg, rgba(184, 107, 75, .1) 0%, transparent 62%);
}

.page-about .milestone__sum {
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding: 16px 12px 16px 4px;
  cursor: pointer;
  list-style: none;
}

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

.page-about .milestone__sum::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 16px;
  color: var(--clay);
}

.page-about .milestone[open] .milestone__sum::after {
  content: "–";
}

.page-about .milestone__year {
  min-width: 52px;
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--red);
}

.page-about .milestone__head {
  font-size: 16px;
  font-weight: 800;
  letter-spacing: -.01em;
}

.page-about .milestone__body {
  padding: 0 12px 20px 4px;
}

.page-about .milestone__body p {
  margin: 0;
  max-width: 64ch;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--stone);
  border-left: 2px solid var(--clay);
  padding-left: 14px;
}

/* ---------- 联系与后续 ---------- */
.page-about .about-contact {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-contact li {
  display: grid;
  gap: 3px;
  padding: 9px 0;
  border-top: 1px solid var(--line-light);
}

.page-about .about-contact li:first-child {
  border-top: none;
  padding-top: 0;
}

.page-about .about-contact__key {
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--moss);
}

.page-about .about-contact__val {
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--carbon);
  word-break: break-word;
}

.page-about .about-next {
  margin-top: 44px;
  padding-top: 22px;
  border-top: 3px solid var(--carbon);
}

.page-about .about-next__label {
  margin: 0 0 14px;
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--clay);
}

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

.page-about .about-next__list li {
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding: 13px 15px;
  background: var(--warm);
}

.page-about .about-next__list a {
  font-size: 15px;
  font-weight: 700;
  color: var(--blue);
  text-decoration: none;
  width: fit-content;
  border-bottom: 1px solid transparent;
}

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

.page-about .about-next__list span {
  font-size: 13px;
  line-height: 1.6;
  color: var(--stone);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about {
    --about-tick: 86px;
  }

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

  .page-about .field-list__row {
    grid-template-columns: 150px minmax(0, 1fr);
    gap: 28px;
    align-items: baseline;
  }

  .page-about .crew {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 46px;
  }

  .page-about .crew__item:nth-child(2) {
    border-top-color: var(--line-light);
  }

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

  .page-about .milestone__body {
    padding-left: 72px;
  }

  .page-about .milestone__body p {
    padding-left: 18px;
  }

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

@media (min-width: 980px) {
  .page-about .section {
    padding: 76px 0;
  }

  .page-about .about-hero {
    padding: 74px 0 84px;
  }

  .page-about .about-split {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, .72fr);
    gap: 54px;
    align-items: start;
  }

  .page-about .about-media-split {
    grid-template-columns: minmax(0, 460px) minmax(0, 1fr);
    gap: 44px;
    align-items: center;
  }

  .page-about .ladder__item {
    grid-template-columns: var(--about-tick) minmax(0, 1fr);
    gap: 28px;
    padding: 24px 0 24px 20px;
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-about .tabs__tab {
    transition: none;
  }
}
</final>

.page-about {
  --soft: currentColor;
}