.page-about{
  --about-rail-x: 0px;
  --about-dot: 8px;
  --about-pad: 34px;
  --about-gap: clamp(56px, 8vw, 104px);
  padding-bottom: clamp(72px, 10vw, 140px);
}
@media (min-width: 900px){
  .page-about{
    --about-pad: 56px;
  }
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumbs{
  padding: 22px 0 0;
  font-size: 12px;
  letter-spacing: .12em;
}
.page-about .breadcrumbs ol{
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  color: var(--dim);
}
.page-about .breadcrumbs li + li::before{
  content: "/";
  margin-right: 8px;
  color: var(--line);
}
.page-about .breadcrumbs a{
  color: var(--mid);
  text-decoration: none;
}
.page-about .breadcrumbs a:hover,
.page-about .breadcrumbs a:focus-visible{
  color: var(--cyan);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero{
  display: grid;
  gap: clamp(28px, 4vw, 56px);
  align-items: center;
  padding: clamp(30px, 5vw, 64px) 0 clamp(52px, 7vw, 92px);
}
@media (min-width: 900px){
  .page-about .about-hero{
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
  }
}
.page-about .about-hero__title{
  margin: 14px 0 20px;
  font-size: clamp(34px, 5.2vw, 68px);
  font-weight: 300;
  line-height: 1.12;
  letter-spacing: -.02em;
  color: var(--hi);
}
.page-about .about-hero__lead{
  max-width: 60ch;
  margin: 0 0 30px;
  font-size: clamp(16px, 1.15vw, 18px);
  line-height: 1.8;
  color: var(--mid);
}
.page-about .about-hero__facts{
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px 24px;
  margin: 0 0 34px;
  padding: 0;
  list-style: none;
}
@media (min-width: 680px){
  .page-about .about-hero__facts{
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}
.page-about .about-fact{
  padding-top: 12px;
  border-top: 1px solid var(--line);
}
.page-about .about-fact__num{
  display: block;
  font-family: var(--font-cond);
  font-size: clamp(32px, 4.2vw, 52px);
  font-weight: 600;
  line-height: .92;
  letter-spacing: .01em;
  color: var(--hi);
}
.page-about .about-fact__unit{
  margin-left: .16em;
  font-size: .42em;
  color: var(--cyan);
}
.page-about .about-fact__label{
  display: block;
  margin-top: 8px;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--dim);
}
.page-about .about-hero__actions{
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}
.page-about .about-hero__media{
  position: relative;
  margin: 0;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  clip-path: polygon(0 0, 100% 0, 100% 88%, 0 100%);
  background: var(--rail);
}
.page-about .about-hero__media::after{
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(115deg, rgba(5, 8, 15, .72) 0%, rgba(5, 8, 15, 0) 58%),
              linear-gradient(0deg, rgba(255, 122, 47, .14), rgba(56, 232, 208, .08));
  pointer-events: none;
}
.page-about .about-hero__media img{
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}

/* ---------- 纵向主线 ---------- */
.page-about .about-thread{
  position: relative;
}
.page-about .about-thread::before{
  content: "";
  position: absolute;
  left: var(--about-rail-x);
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: linear-gradient(180deg, transparent, var(--line) 6%, var(--line) 94%, transparent);
}

/* ---------- 面板 ---------- */
.page-about .about-panel{
  position: relative;
  padding: 0 0 var(--about-gap) var(--about-pad);
}
.page-about .about-panel:last-child{
  padding-bottom: 12px;
}
.page-about .about-panel::before{
  content: "";
  position: absolute;
  left: calc(var(--about-rail-x) - 4px);
  top: 8px;
  width: var(--about-dot);
  height: var(--about-dot);
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 14px rgba(56, 232, 208, .65);
}
.page-about .about-panel__title{
  margin: 14px 0 20px;
  font-size: clamp(26px, 3.4vw, 42px);
  font-weight: 600;
  line-height: 1.24;
  letter-spacing: -.01em;
  color: var(--hi);
}
.page-about .about-panel__lead{
  max-width: 56ch;
  margin: 0 0 8px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--mid);
}
.page-about .about-panel__body{
  max-width: 68ch;
}
.page-about .about-panel__body p{
  margin: 0 0 18px;
  font-size: clamp(16px, 1.1vw, 17px);
  line-height: 1.85;
  color: var(--mid);
}
.page-about .about-panel__body p:last-child{
  margin-bottom: 0;
}

/* ---------- 起点标签 ---------- */
.page-about .about-tags{
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
}

/* ---------- 团队比例与列表 ---------- */
.page-about .about-ratio{
  display: flex;
  gap: 2px;
  height: 14px;
  margin: 30px 0 0;
  overflow: hidden;
  border-radius: 1px;
}
.page-about .about-ratio__seg{
  display: block;
  height: 100%;
  transform-origin: left center;
  animation: aboutGrow .9s var(--ease) both;
}
.page-about .about-ratio__seg--svc{
  width: 56.5%;
  background: var(--cyan);
  animation-delay: .05s;
}
.page-about .about-ratio__seg--content{
  width: 19.6%;
  background: var(--orange);
  animation-delay: .16s;
}
.page-about .about-ratio__seg--data{
  width: 13%;
  background: var(--violet);
  animation-delay: .27s;
}
.page-about .about-ratio__seg--tech{
  width: 10.9%;
  background: var(--line);
  animation-delay: .38s;
}
@keyframes aboutGrow{
  from{ transform: scaleX(0); }
  to{ transform: scaleX(1); }
}

.page-about .about-team{
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
  margin: 30px 0 0;
  padding: 0;
  list-style: none;
}
@media (min-width: 700px){
  .page-about .about-team{
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 30px 36px;
  }
}
@media (min-width: 1100px){
  .page-about .about-team{
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}
.page-about .about-team__item{
  padding-top: 16px;
  border-top: 1px solid var(--line);
}
.page-about .about-team__num{
  margin: 0;
  font-family: var(--font-cond);
  font-size: 38px;
  font-weight: 600;
  line-height: .9;
  color: var(--hi);
}
.page-about .about-team__item--svc .about-team__num{ color: var(--cyan); }
.page-about .about-team__item--content .about-team__num{ color: var(--orange); }
.page-about .about-team__item--data .about-team__num{ color: var(--violet); }
.page-about .about-team__item--tech .about-team__num{ color: var(--mid); }
.page-about .about-team__name{
  margin: 12px 0 10px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: .04em;
  color: var(--hi);
}
.page-about .about-team__desc{
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mid);
}

/* ---------- 比赛日节奏 ---------- */
.page-about .about-day{
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  margin: 34px 0 0;
  padding: 0;
  list-style: none;
}
@media (min-width: 900px){
  .page-about .about-day{
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0 28px;
  }
}
.page-about .about-day__step{
  position: relative;
  padding: 22px 0 24px;
  border-top: 1px solid var(--line);
}
@media (min-width: 900px){
  .page-about .about-day__step{
    padding: 26px 0 0;
  }
}
.page-about .about-day__step::before{
  content: "";
  position: absolute;
  top: -3px;
  left: 0;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--cyan);
}
.page-about .about-day__time{
  margin: 0;
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--cyan);
}
.page-about .about-day__name{
  margin: 12px 0 10px;
  font-size: 17px;
  font-weight: 600;
  color: var(--hi);
}
.page-about .about-day__text{
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mid);
}

/* ---------- 数据能力 ---------- */
.page-about .about-panel--data{
  position: relative;
}
.page-about .about-data__bg{
  position: relative;
  width: 100%;
  height: 190px;
  margin: 28px 0 0;
  opacity: .3;
  pointer-events: none;
}
.page-about .about-data__bg img{
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}
.page-about .about-data__text{
  max-width: 66ch;
}
.page-about .about-data__text > p{
  margin: 0 0 18px;
  font-size: clamp(16px, 1.1vw, 17px);
  line-height: 1.85;
  color: var(--mid);
}
@media (min-width: 900px){
  .page-about .about-data__bg{
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    width: min(46%, 520px);
    height: auto;
    margin: 0;
    opacity: .25;
    -webkit-mask-image: linear-gradient(270deg, #000 0%, rgba(0, 0, 0, .2) 70%, transparent 100%);
    mask-image: linear-gradient(270deg, #000 0%, rgba(0, 0, 0, .2) 70%, transparent 100%);
  }
  .page-about .about-data__text{
    position: relative;
    z-index: 1;
  }
}
.page-about .about-metrics{
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  margin: 30px 0 0;
}
@media (min-width: 640px){
  .page-about .about-metrics{
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 44px;
  }
}
.page-about .about-metrics__row{
  padding: 14px 0;
  border-top: 1px solid var(--line);
}
.page-about .about-metrics dt{
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--dim);
}
.page-about .about-metrics dd{
  margin: 8px 0 0;
  font-size: 16px;
  color: var(--hi);
  font-family: var(--font-cond);
  letter-spacing: .02em;
}

/* ---------- 本地布局 ---------- */
.page-about .about-local{
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 48px);
  align-items: center;
}
.page-about .about-local::after{
  content: "";
  position: absolute;
  inset: -6% -3% -6% 0;
  z-index: 0;
  pointer-events: none;
  background:
    repeating-linear-gradient(90deg, rgba(56, 232, 208, .07) 0 1px, transparent 1px 110px),
    radial-gradient(58% 46% at 78% 34%, rgba(255, 122, 47, .1), transparent 72%);
}
.page-about .about-local__media,
.page-about .about-local__copy{
  position: relative;
  z-index: 1;
}
.page-about .about-local__media{
  margin: 0;
  aspect-ratio: 3 / 4;
  overflow: hidden;
  clip-path: polygon(0 0, 100% 0, 100% 92%, 0 100%);
  background: var(--rail);
}
.page-about .about-local__media img{
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}
@media (min-width: 900px){
  .page-about .about-local{
    grid-template-columns: minmax(0, .72fr) minmax(0, 1fr);
  }
}
.page-about .about-local__copy > p{
  max-width: 58ch;
  margin: 0 0 18px;
  font-size: clamp(16px, 1.1vw, 17px);
  line-height: 1.85;
  color: var(--mid);
}
.page-about .about-local__list{
  display: grid;
  gap: 12px;
  margin: 26px 0 24px;
  padding: 0;
  list-style: none;
}
.page-about .about-local__list li{
  position: relative;
  padding-left: 22px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--mid);
}
.page-about .about-local__list li::before{
  content: "";
  position: absolute;
  left: 0;
  top: .78em;
  width: 9px;
  height: 1px;
  background: var(--orange);
}
.page-about .about-local__more{
  margin: 0;
}

/* ---------- 发展历程 ---------- */
.page-about .about-tl{
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  margin: 38px 0 0;
  padding: 0;
  list-style: none;
}
.page-about .about-tl__item{
  position: relative;
  padding: 0 0 30px 30px;
  border-left: 1px solid var(--line);
}
.page-about .about-tl__item::before{
  content: "";
  position: absolute;
  left: -5px;
  top: 6px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--void);
  border: 1px solid var(--cyan);
}
.page-about .about-tl__item:last-child{
  padding-bottom: 8px;
}
.page-about .about-tl__year{
  margin: 0;
  font-family: var(--font-cond);
  font-size: 30px;
  font-weight: 600;
  line-height: 1;
  letter-spacing: .02em;
  color: var(--hi);
}
.page-about .about-tl__name{
  margin: 10px 0 8px;
  font-size: 15px;
  font-weight: 600;
  color: var(--cyan);
}
.page-about .about-tl__text{
  margin: 0;
  max-width: 46ch;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mid);
}
@media (min-width: 960px){
  .page-about .about-tl{
    grid-template-columns: repeat(6, minmax(0, 1fr));
    gap: 0 22px;
    margin-top: 48px;
  }
  .page-about .about-tl__item{
    border-left: 0;
    border-top: 1px solid var(--line);
    padding: 30px 0 0;
  }
  .page-about .about-tl__item::before{
    left: 0;
    top: -5px;
  }
  .page-about .about-tl__item:last-child{
    padding-bottom: 0;
  }
  .page-about .about-tl__year{
    font-size: clamp(28px, 2.6vw, 40px);
  }
}

/* ---------- 下一步 ---------- */
.page-about .about-next-wrap{
  padding-top: clamp(40px, 6vw, 72px);
}
.page-about .about-next{
  display: grid;
  gap: 0;
  margin: 34px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}
.page-about .about-next li{
  border-bottom: 1px solid var(--line);
}
.page-about .about-next a{
  display: flex;
  flex-wrap: wrap;
  gap: 6px 24px;
  align-items: baseline;
  justify-content: space-between;
  padding: 22px 0;
  text-decoration: none;
  color: var(--hi);
  transition: color .3s var(--ease), padding-left .3s var(--ease);
}
.page-about .about-next a:hover,
.page-about .about-next a:focus-visible{
  color: var(--cyan);
  padding-left: 10px;
}
.page-about .about-next__label{
  font-size: clamp(18px, 1.6vw, 22px);
  font-weight: 600;
  letter-spacing: -.01em;
}
.page-about .about-next__hint{
  font-size: 14px;
  line-height: 1.7;
  color: var(--mid);
  max-width: 46ch;
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce){
  .page-about .about-ratio__seg{
    animation: none;
    transform: none;
  }
  .page-about .about-next a{
    transition: color .2s linear;
  }
  .page-about .about-next a:hover,
  .page-about .about-next a:focus-visible{
    padding-left: 0;
  }
}