/* ================= 发展历程 / page-about ================= */

.page-about {
  --about-hair: rgba(212, 175, 55, .26);
  --about-hair-soft: rgba(143, 163, 156, .18);
  --about-panel: #10231D;
  --about-panel-hi: #16332A;
  --about-rise: .55s;
  color: var(--paper);
  background:
    radial-gradient(1200px 540px at 84% -10%, rgba(25, 227, 194, .07), transparent 60%),
    radial-gradient(900px 480px at -8% 30%, rgba(212, 175, 55, .055), transparent 60%),
    var(--ink);
  overflow-x: clip;
}

.page-about h1,
.page-about h2,
.page-about h3 {
  font-family: var(--font-head);
  letter-spacing: -.02em;
  line-height: 1.05;
  color: var(--paper);
  margin: 0;
}

.page-about .breadcrumbs {
  padding-top: clamp(1rem, 3vw, 1.75rem);
}

.page-about .stat-num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(1.6rem, 4vw, 2.5rem);
  line-height: 1;
  letter-spacing: -.03em;
  color: var(--amber);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  padding-bottom: clamp(2.5rem, 6vw, 4.5rem);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.75rem, 4vw, 2.75rem);
  padding-top: clamp(1.25rem, 4vw, 2.25rem);
  padding-bottom: clamp(2rem, 5vw, 3.5rem);
}

.page-about .about-hero__lead h1 {
  font-size: clamp(2rem, 6.4vw, 4.4rem);
  line-height: 1.02;
  margin-bottom: clamp(.9rem, 2.4vw, 1.4rem);
}

.page-about .about-hero__intro {
  max-width: 48ch;
  color: var(--muted);
  font-size: clamp(.94rem, 1.15vw, 1.05rem);
  line-height: 1.85;
}

.page-about .factstrip {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  background: var(--about-hair-soft);
  border: 1px solid var(--about-hair-soft);
}

.page-about .factstrip__row {
  background: var(--about-panel);
  padding: clamp(.85rem, 2vw, 1.15rem);
}

.page-about .factstrip__row dt {
  font-size: .75rem;
  letter-spacing: .12em;
  color: var(--muted);
  margin-bottom: .45rem;
}

.page-about .factstrip__row dd {
  margin: 0;
  display: flex;
  align-items: baseline;
  gap: .3rem;
}

.page-about .factstrip__row dd small {
  font-size: .78rem;
  color: var(--muted);
}

.page-about .about-hero__media {
  margin: 0;
}

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 18 / 7;
  object-fit: cover;
  filter: saturate(.85) contrast(1.06) brightness(.88);
}

/* ---------- 起点 ---------- */

.page-about .about-origin__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.5rem, 3.5vw, 2.5rem);
}

.page-about .about-origin__main .section__title {
  margin-bottom: clamp(1rem, 2.5vw, 1.5rem);
}

.page-about .about-origin__note {
  align-self: start;
}

.page-about .about-origin__note p {
  color: var(--muted);
  line-height: 1.85;
  font-size: .92rem;
}

/* ---------- 时间轴 ---------- */

.page-about .tl {
  list-style: none;
  display: flex;
  gap: 0;
  margin: clamp(1.75rem, 4vw, 2.5rem) 0 0;
  padding: 0 0 1rem;
  overflow-x: auto;
  overscroll-behavior-x: contain;
  scroll-snap-type: x proximity;
  scrollbar-width: thin;
  scrollbar-color: var(--line) transparent;
  border-top: 1px solid var(--about-hair-soft);
}

.page-about .tl::-webkit-scrollbar {
  height: 4px;
}

.page-about .tl::-webkit-scrollbar-thumb {
  background: var(--line);
  border-radius: 2px;
}

.page-about .tl__item {
  position: relative;
  flex: 0 0 min(19rem, 78vw);
  scroll-snap-align: start;
  padding: 1.85rem clamp(1.25rem, 2.5vw, 2rem) 1.5rem 0;
  border-right: 1px solid var(--about-hair-soft);
  background: linear-gradient(180deg, rgba(22, 51, 42, .42), transparent 68%);
  transition: transform var(--about-rise) var(--ease), background var(--about-rise) var(--ease);
}

.page-about .tl__item::before {
  content: "";
  position: absolute;
  top: -4px;
  left: 0;
  width: 8px;
  height: 8px;
  background: var(--gold);
  transform: rotate(45deg);
  transition: background var(--about-rise) var(--ease), box-shadow var(--about-rise) var(--ease);
}

.page-about .tl__num {
  font-family: var(--font-mono);
  font-size: clamp(1.6rem, 3.4vw, 2.2rem);
  line-height: 1;
  color: var(--amber);
  opacity: .82;
  margin: 0 0 .7rem;
}

.page-about .tl__title {
  font-size: clamp(1.05rem, 2.1vw, 1.25rem);
  margin-bottom: .4rem;
}

.page-about .tl__meta {
  font-size: .76rem;
  letter-spacing: .08em;
  color: var(--muted);
  margin: 0 0 .7rem;
}

.page-about .tl__desc {
  font-size: .88rem;
  line-height: 1.8;
  color: var(--muted);
  margin: 0;
  transition: color var(--about-rise) var(--ease);
}

@media (hover: hover) {
  .page-about .tl__item:hover {
    transform: translateY(-2px);
    background: linear-gradient(180deg, rgba(22, 51, 42, .8), transparent 74%);
  }

  .page-about .tl__item:hover::before {
    background: var(--cyan);
    box-shadow: 0 0 0 5px rgba(25, 227, 194, .16);
  }

  .page-about .tl__item:hover .tl__desc {
    color: var(--paper);
  }
}

/* ---------- 数据能力 ---------- */

.page-about .about-data__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.75rem, 4vw, 3.25rem);
  align-items: center;
}

.page-about .about-data__copy .section__title {
  margin-bottom: clamp(.9rem, 2.2vw, 1.35rem);
}

.page-about .about-data__text {
  color: var(--muted);
  font-size: .95rem;
  line-height: 1.88;
  max-width: 52ch;
}

.page-about .about-data__text a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(25, 227, 194, .35);
}

.page-about .about-data__text a:hover {
  border-bottom-color: var(--cyan);
}

.page-about .datagrid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(1.5rem, 3vw, 2rem) 0 0;
  background: var(--about-hair-soft);
  border: 1px solid var(--about-hair-soft);
}

.page-about .datagrid__cell {
  background: var(--about-panel);
  padding: clamp(.9rem, 2vw, 1.15rem) clamp(.9rem, 2vw, 1.2rem) clamp(1rem, 2.2vw, 1.3rem);
}

.page-about .datagrid__cell dt {
  font-size: .75rem;
  letter-spacing: .12em;
  color: var(--muted);
  margin-bottom: .5rem;
}

.page-about .datagrid__cell dd {
  margin: 0;
  display: flex;
  align-items: baseline;
  gap: .3rem;
}

.page-about .datagrid__cell dd small {
  font-size: .76rem;
  color: var(--muted);
}

.page-about .about-data__media {
  margin: 0;
}

.page-about .about-data__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

/* ---------- 团队 ---------- */

.page-about .about-team__grid {
  margin-top: clamp(1.75rem, 4vw, 2.5rem);
}

.page-about .about-team__card {
  border-left: 2px solid var(--about-hair);
  padding-left: clamp(.9rem, 2vw, 1.35rem);
}

.page-about .about-team__card .card__body a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(25, 227, 194, .35);
}

.page-about .about-team__card .card__body a:hover {
  border-bottom-color: var(--cyan);
}

/* ---------- 赛季档案 ---------- */

.page-about .about-archive__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.75rem, 4vw, 3.25rem);
  align-items: start;
}

.page-about .about-archive__media {
  margin: 0;
}

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

.page-about .about-archive__main .section__title {
  margin-bottom: clamp(.9rem, 2.2vw, 1.35rem);
}

.page-about .about-archive__text {
  color: var(--muted);
  font-size: .95rem;
  line-height: 1.88;
  max-width: 54ch;
}

.page-about .about-archive__text a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(25, 227, 194, .35);
}

.page-about .about-archive__text a:hover {
  border-bottom-color: var(--cyan);
}

.page-about .archlist {
  margin-top: clamp(1.5rem, 3vw, 2rem);
  border-top: 1px solid var(--about-hair-soft);
}

.page-about .arch {
  border-bottom: 1px solid var(--about-hair-soft);
}

.page-about .arch summary {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.05rem .25rem;
  cursor: pointer;
  list-style: none;
  transition: color .25s var(--ease), padding-left .25s var(--ease);
}

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

.page-about .arch summary::after {
  content: "＋";
  font-family: var(--font-mono);
  font-size: .95rem;
  color: var(--muted);
  transition: color .25s var(--ease);
}

.page-about .arch[open] summary::after {
  content: "－";
  color: var(--cyan);
}

.page-about .arch summary:hover {
  color: var(--gold);
  padding-left: .55rem;
}

.page-about .arch__round {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(1rem, 2.2vw, 1.25rem);
  color: var(--amber);
}

.page-about .arch__body {
  padding: .1rem .25rem 1.25rem;
  max-width: 48ch;
  color: var(--muted);
  font-size: .9rem;
  line-height: 1.85;
}

.page-about .arch__body p {
  margin: 0;
}

/* ---------- 生态与认可 ---------- */

.page-about .about-ecosystem__filter {
  margin-top: clamp(1.5rem, 3vw, 2rem);
}

.page-about .section__note a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(25, 227, 194, .35);
}

.page-about .tagcloud {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: .6rem;
  margin: clamp(1.25rem, 3vw, 1.75rem) 0 0;
  padding: 0;
}

.page-about .tagcloud__item {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .55rem 1rem;
  background: var(--about-panel);
  border: 1px solid var(--about-hair-soft);
  color: var(--paper);
  font-size: .84rem;
  line-height: 1.4;
  transition: border-color .28s var(--ease), transform .28s var(--ease);
}

.page-about .tagcloud__item::before {
  content: "";
  flex: none;
  width: 6px;
  height: 6px;
  background: var(--muted);
}

.page-about .tagcloud__item[data-tags~="数据"]::before { background: var(--cyan); }
.page-about .tagcloud__item[data-tags~="媒体"]::before { background: var(--gold); }
.page-about .tagcloud__item[data-tags~="高校"]::before { background: var(--paper); }
.page-about .tagcloud__item[data-tags~="荣誉"]::before { background: var(--amber); }

.page-about .tagcloud__item:hover {
  border-color: var(--about-hair);
  transform: translateY(-2px);
}

.page-about .is-hidden {
  display: none !important;
}

/* ---------- 地域 ---------- */

.page-about .about-region {
  position: relative;
  overflow: hidden;
}

.page-about .about-region::after {
  content: "";
  position: absolute;
  left: -10%;
  right: -10%;
  bottom: 0;
  height: min(240px, 38vw);
  pointer-events: none;
  z-index: 0;
  background:
    repeating-linear-gradient(118deg, transparent 0 26px, rgba(212, 175, 55, .07) 26px 27px),
    repeating-linear-gradient(62deg, transparent 0 30px, rgba(31, 77, 64, .38) 30px 31px);
  -webkit-mask-image: linear-gradient(to top, rgba(0, 0, 0, .95), transparent 84%);
  mask-image: linear-gradient(to top, rgba(0, 0, 0, .95), transparent 84%);
}

.page-about .about-region__inner {
  position: relative;
  z-index: 1;
  max-width: 56ch;
}

.page-about .about-region__inner .section__title {
  margin-bottom: clamp(.85rem, 2vw, 1.2rem);
}

.page-about .about-region__text {
  color: var(--muted);
  font-size: .95rem;
  line-height: 1.88;
}

/* ---------- 入场 ---------- */

@media (prefers-reduced-motion: no-preference) {
  @supports (animation-timeline: view()) {
    .page-about [data-reveal] {
      animation: about-in linear both;
      animation-timeline: view();
      animation-range: entry 0% cover 26%;
    }
  }
}

@keyframes about-in {
  from {
    opacity: 0;
    transform: translate3d(0, .85rem, 0);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about [data-reveal] {
    animation: none;
    opacity: 1;
    transform: none;
  }
}

/* ---------- 响应式 ---------- */

@media (min-width: 720px) {
  .page-about .about-hero__media img {
    aspect-ratio: 18 / 7;
  }
}

@media (max-width: 719px) {
  .page-about .about-hero__media img {
    aspect-ratio: 4 / 3;
  }

  .page-about .tl__item {
    flex-basis: 76vw;
  }
}

@media (min-width: 880px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    column-gap: clamp(2rem, 5vw, 4.5rem);
    align-items: end;
  }

  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    column-gap: clamp(2rem, 5vw, 4rem);
    align-items: start;
  }

  .page-about .about-data__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
  }

  .page-about .about-archive__grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
  }
}

@media (min-width: 1100px) {
  .page-about .tl {
    overflow-x: visible;
    flex-wrap: wrap;
  }

  .page-about .tl__item {
    flex: 1 1 15rem;
  }
}
<<<END>>>