.page-about {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--f-body);
}

.page-about .breadcrumb {
  padding: 14px 0 0;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  margin-top: 10px;
  padding: 36px 0 44px;
  overflow: hidden;
  background: linear-gradient(150deg, var(--sand) 0%, var(--sand) 58%, #dcccb0 100%);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: repeating-linear-gradient(90deg, rgba(11, 59, 60, .07) 0 1px, transparent 1px 46px);
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 28px;
}

.page-about .about-hero__kicker {
  display: inline-block;
  margin: 0 0 14px;
  padding: 4px 10px;
  background: var(--orange);
  color: var(--teal-deep);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .12em;
  transform: skewX(-6deg);
}

.page-about .about-hero__title {
  margin: 0 0 18px;
  font-family: var(--f-display);
  font-size: clamp(30px, 7.4vw, 56px);
  font-weight: 800;
  letter-spacing: -.02em;
  line-height: 1.14;
  color: var(--teal-deep);
}

.page-about .about-hero__text {
  margin: 0 0 22px;
  max-width: 36em;
  font-size: 17px;
  line-height: 1.8;
  color: var(--ink);
}

.page-about .about-hero__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0;
}

.page-about .about-hero__panel {
  position: relative;
  background: var(--teal);
  color: var(--paper);
  padding: 26px 22px;
  box-shadow: 10px 10px 0 rgba(11, 59, 60, .16);
}

.page-about .about-hero__panel-title {
  margin: 0 0 16px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .12em;
  color: var(--orange-soft);
}

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

.page-about .about-hero__facts li {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 10px 0 12px;
  border-bottom: 1px solid rgba(248, 246, 240, .2);
}

.page-about .about-hero__facts li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-about .about-hero__num {
  font-family: var(--f-mono);
  font-size: 40px;
  font-weight: 800;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--orange);
}

.page-about .about-hero__unit {
  font-size: 14px;
  letter-spacing: .06em;
  color: rgba(248, 246, 240, .84);
}

/* ---------- 主体两栏 ---------- */
.page-about .about-body {
  display: block;
  padding: 0 0 56px;
}

/* ---------- 目录 ---------- */
.page-about .about-index {
  padding: 18px 0 6px;
  border-bottom: 2px solid var(--teal);
  margin-bottom: 6px;
}

.page-about .about-index__title {
  margin: 0 0 10px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .12em;
  color: var(--muted);
}

.page-about .about-index__nav {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 8px;
  scrollbar-width: thin;
}

.page-about .about-index__link {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 12px;
  border: 1px solid var(--line-strong);
  background: var(--paper);
  color: var(--teal);
  text-decoration: none;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .04em;
  transition: background .2s var(--ease), color .2s var(--ease), border-color .2s var(--ease);
}

.page-about .about-index__link:hover {
  border-color: var(--orange);
  color: var(--orange);
}

.page-about .about-index__num {
  font-family: var(--f-mono);
  font-size: 13px;
  color: var(--orange);
}

.page-about .about-index__link[aria-current="true"] {
  background: var(--orange);
  border-color: var(--orange);
  color: var(--teal-deep);
}

.page-about .about-index__link[aria-current="true"] .about-index__num {
  color: var(--teal-deep);
}

.page-about .about-index__top {
  display: none;
  align-items: center;
  gap: 6px;
  margin-top: 16px;
  padding: 8px 14px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--paper);
  color: var(--teal);
  font: inherit;
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
  transition: background .2s var(--ease), color .2s var(--ease);
}

.page-about .about-index__top:hover {
  background: var(--teal);
  border-color: var(--teal);
  color: var(--paper);
}

/* ---------- 章节 ---------- */
.page-about .about-section {
  position: relative;
  padding: 34px 0 40px;
}

.page-about .about-section + .about-section::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background-image: repeating-linear-gradient(90deg, var(--line-strong) 0 8px, transparent 8px 18px);
}

.page-about .about-section__head {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 20px;
}

.page-about .about-section__num {
  flex: 0 0 auto;
  font-family: var(--f-mono);
  font-size: 38px;
  font-weight: 800;
  line-height: .92;
  letter-spacing: -.03em;
  color: var(--orange);
}

.page-about .about-section__title {
  margin: 6px 0 0;
  font-family: var(--f-display);
  font-size: clamp(21px, 4.6vw, 32px);
  font-weight: 800;
  letter-spacing: -.02em;
  line-height: 1.22;
  color: var(--teal-deep);
}

.page-about .about-section__intro {
  margin: 0 0 22px;
  max-width: 42em;
  font-size: 16px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-section__lead {
  margin: 18px 0 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink);
}

.page-about .about-section__lead a {
  color: var(--teal);
  text-decoration: underline;
  text-decoration-color: var(--aqua);
  text-underline-offset: 3px;
}

.page-about .about-section__lead a:hover {
  color: var(--orange);
}

.page-about .about-section__grid {
  display: grid;
  gap: 24px;
}

.page-about .about-section .prose {
  max-width: 42em;
}

.page-about .about-section .prose p {
  margin: 0 0 1.05em;
  font-size: 17px;
  line-height: 1.8;
  color: var(--ink);
}

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

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: 0;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--line-strong);
  box-shadow: 8px 8px 0 rgba(11, 59, 60, .1);
}

.page-about .about-figure__caption {
  margin-top: 12px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
  border-left: 2px solid var(--orange-soft);
  padding-left: 10px;
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 6px 0 0 26px;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 12px;
  bottom: 14px;
  width: 2px;
  background: linear-gradient(180deg, var(--orange) 0%, var(--aqua) 100%);
}

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

.page-about .about-node:last-child {
  padding-bottom: 0;
}

.page-about .about-node::before {
  content: "";
  position: absolute;
  left: -26px;
  top: 5px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--paper);
  border: 2px solid var(--orange);
}

.page-about .about-node__year {
  display: inline-block;
  font-family: var(--f-mono);
  font-size: 21px;
  font-weight: 800;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--teal);
}

.page-about .about-node__title {
  margin: 7px 0 6px;
  font-size: 17px;
  font-weight: 800;
  color: var(--teal-deep);
}

.page-about .about-node__text {
  margin: 0;
  font-size: 16px;
  line-height: 1.78;
  color: var(--ink);
}

.page-about .about-node__detail {
  margin: 10px 0 0;
  padding-left: 12px;
  border-left: 2px solid var(--orange-soft);
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  display: grid;
  gap: 14px;
  margin-top: 20px;
}

.page-about .about-team__item {
  background: var(--paper);
  border: 1px solid var(--line-strong);
  box-shadow: 5px 5px 0 rgba(11, 59, 60, .08);
  padding: 18px 16px;
  transition: transform .25s var(--ease), box-shadow .25s var(--ease);
}

.page-about .about-team__item:hover {
  transform: translate(3px, -3px);
  box-shadow: 8px 8px 0 rgba(11, 59, 60, .14);
}

.page-about .about-team__name {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 800;
  color: var(--teal);
}

.page-about .about-team__name::before {
  content: "";
  width: 10px;
  height: 10px;
  background: var(--orange);
  transform: skewX(-12deg);
}

.page-about .about-team__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink);
}

.page-about .about-flow {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-flow__step {
  background: var(--sand);
  border-top: 3px solid var(--teal);
  padding: 13px 14px 15px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink);
}

.page-about .about-flow__num {
  display: block;
  margin-bottom: 6px;
  font-family: var(--f-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--orange);
}

/* ---------- 赛事网络 ---------- */
.page-about .about-stats {
  list-style: none;
  margin: 0 0 24px;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-strong);
  border: 1px solid var(--line-strong);
}

.page-about .about-stat {
  background: var(--teal-deep);
  padding: 16px 14px;
}

.page-about .about-stat__num {
  display: block;
  font-family: var(--f-mono);
  font-size: 28px;
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -.02em;
  color: var(--orange);
}

.page-about .about-stat__label {
  display: block;
  margin-top: 6px;
  font-size: 12px;
  letter-spacing: .08em;
  color: rgba(248, 246, 240, .78);
}

.page-about .about-partners {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-about .about-partners__item {
  border-left: 3px solid var(--aqua);
  padding: 2px 0 2px 14px;
}

.page-about .about-partners__name {
  margin: 0 0 6px;
  font-size: 15px;
  font-weight: 800;
  color: var(--teal);
}

.page-about .about-partners__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--ink);
}

/* ---------- 合作规则 ---------- */
.page-about .about-rules {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-about .about-rules__item {
  display: grid;
  gap: 5px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .about-rules__name {
  font-size: 15px;
  font-weight: 800;
  color: var(--teal);
}

.page-about .about-rules__text {
  margin: 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink);
}

/* ---------- 里程碑 ---------- */
.page-about .about-milestones {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-milestones__item {
  display: grid;
  grid-template-columns: 78px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .about-milestones__year {
  font-family: var(--f-mono);
  font-size: 14px;
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--orange);
  padding-top: 2px;
}

.page-about .about-milestones__text {
  margin: 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink);
}

/* ---------- 结尾 ---------- */
.page-about .about-cta {
  margin-top: 26px;
  padding: 22px 20px;
  background: var(--sand);
  border-left: 4px solid var(--orange);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
}

.page-about .about-cta__text {
  flex: 1 1 100%;
  margin: 0;
  font-size: 16px;
  line-height: 1.7;
  font-weight: 700;
  color: var(--teal-deep);
}

.page-about .about-cta__link {
  color: var(--teal);
  font-size: 14px;
  font-weight: 700;
  text-decoration: underline;
  text-decoration-color: var(--aqua);
  text-underline-offset: 3px;
}

.page-about .about-cta__link:hover {
  color: var(--orange);
}

/* ---------- 平板 ---------- */
@media (min-width: 720px) {
  .page-about .about-team {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

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

  .page-about .about-partners {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }

  .page-about .about-rules__item {
    grid-template-columns: 152px minmax(0, 1fr);
    gap: 22px;
    align-items: baseline;
  }

  .page-about .about-cta {
    padding: 26px 24px;
  }

  .page-about .about-cta__text {
    flex: 1 1 auto;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 900px) {
  .page-about .about-hero {
    padding: 56px 0 64px;
  }

  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, .88fr);
    align-items: center;
    gap: 0;
  }

  .page-about .about-hero__panel {
    margin-left: -60px;
    padding: 42px 34px 42px 76px;
    clip-path: polygon(13% 0, 100% 0, 100% 100%, 0 100%);
  }

  .page-about .about-hero__num {
    font-size: 48px;
  }

  .page-about .about-section__grid--media {
    grid-template-columns: minmax(0, 1.34fr) minmax(0, 1fr);
    gap: 36px;
    align-items: start;
  }

  .page-about .about-flow {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-milestones__item {
    grid-template-columns: 96px minmax(0, 1fr);
    gap: 24px;
  }
}

@media (min-width: 1024px) {
  .page-about .about-body {
    display: grid;
    grid-template-columns: 176px minmax(0, 1fr);
    gap: 54px;
    align-items: start;
    padding: 34px 0 72px;
  }

  .page-about .about-index {
    position: sticky;
    top: 96px;
    border-bottom: 0;
    border-left: 2px solid var(--line-strong);
    padding: 0 0 0 16px;
    margin-bottom: 0;
  }

  .page-about .about-index__title {
    margin-bottom: 14px;
  }

  .page-about .about-index__nav {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .about-index__link {
    border: 0;
    border-left: 2px solid transparent;
    margin-left: -18px;
    padding: 8px 0 8px 16px;
    background: none;
    font-size: 14px;
    letter-spacing: .02em;
  }

  .page-about .about-index__link:hover {
    color: var(--orange);
    border-left-color: var(--orange-soft);
  }

  .page-about .about-index__num {
    font-family: var(--f-mono);
    font-size: 20px;
    font-weight: 800;
    letter-spacing: -.02em;
  }

  .page-about .about-index__link[aria-current="true"] {
    background: none;
    border-left-color: var(--orange);
    color: var(--orange);
  }

  .page-about .about-index__link[aria-current="true"] .about-index__num {
    color: var(--orange);
  }

  .page-about .about-index__top {
    display: inline-flex;
  }

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

  .page-about .about-section:first-child::before {
    content: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-team__item,
  .page-about .about-index__link,
  .page-about .about-index__top {
    transition: none;
  }

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