.page-about{
  --about-axis-w: 176px;
  --about-gutter: 18px;
  background:
    radial-gradient(1100px 520px at 86% -8%, rgba(43,31,77,.5), transparent 62%),
    radial-gradient(900px 480px at -12% 42%, rgba(92,31,51,.26), transparent 66%),
    var(--yb-ink);
  color: var(--yb-text);
  font-family: var(--yb-font);
  position: relative;
}

.page-about *,
.page-about *::before,
.page-about *::after{
  box-sizing: border-box;
}

.page-about img{
  max-width: 100%;
  height: auto;
  display: block;
}

.page-about a{
  color: inherit;
}

/* ---------- 首屏 ---------- */

.page-about .about-hero{
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: 24px 0 40px;
  border-bottom: 1px solid var(--yb-line);
}

.page-about .about-hero__bg{
  position: absolute;
  inset: 0;
  z-index: -2;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .26;
}

.page-about .about-hero::after{
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(180deg, rgba(5,32,28,.44) 0%, rgba(5,32,28,.9) 58%, var(--yb-ink) 100%),
    linear-gradient(96deg, rgba(43,31,77,.62) 0%, rgba(43,31,77,0) 60%);
}

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

.page-about .yb-crumbs{
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 28px;
  font: 500 12px/1 var(--yb-mono);
  letter-spacing: .06em;
  color: var(--yb-muted);
}

.page-about .yb-crumbs a{
  color: var(--yb-muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .2s var(--yb-ease), border-color .2s var(--yb-ease);
}

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

.page-about .yb-crumbs [aria-current="page"]{
  color: var(--yb-text);
}

.page-about .about-crumbs__sep{
  color: var(--yb-line);
}

.page-about .about-hero__title{
  margin: 10px 0 0;
  font-weight: 900;
  font-size: clamp(31px, 6.6vw, 58px);
  line-height: 1.1;
  letter-spacing: -.02em;
  color: var(--yb-text);
}

.page-about .about-hero__title::after{
  content: "";
  display: block;
  width: 60px;
  height: 3px;
  margin-top: 20px;
  background: linear-gradient(90deg, var(--yb-cyan), rgba(56,242,196,0));
}

.page-about .about-hero__lede{
  margin: 20px 0 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.8;
  color: rgba(233,246,242,.84);
}

.page-about .about-hero__stats{
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0,1fr));
  gap: 1px;
  background: var(--yb-line);
  border: 1px solid var(--yb-line);
  border-radius: var(--yb-radius);
  overflow: hidden;
}

.page-about .about-hero__stats > li{
  display: flex;
  flex-direction: column;
  gap: 7px;
  padding: 15px 16px;
  background: rgba(11,46,40,.9);
}

.page-about .about-hero__num{
  font: 700 28px/1 var(--yb-mono);
  letter-spacing: -.02em;
  color: var(--yb-cyan);
}

.page-about .about-hero__num--yellow{
  color: var(--yb-yellow);
}

.page-about .about-hero__statlabel{
  font-size: 12px;
  line-height: 1.5;
  letter-spacing: .04em;
  color: var(--yb-muted);
}

/* ---------- 主体骨架 ---------- */

.page-about .about-body{
  padding: 32px 0 52px;
}

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

.page-about .about-stream{
  display: flex;
  flex-direction: column;
  min-width: 0;
}

/* ---------- 章节轴 ---------- */

.page-about .about-axis{
  display: flex;
  gap: 6px;
  overflow-x: auto;
  padding: 0 var(--about-gutter) 10px;
  margin: 0 calc(-1 * var(--about-gutter));
  border-bottom: 1px solid var(--yb-line);
  scrollbar-width: none;
}

.page-about .about-axis::-webkit-scrollbar{
  display: none;
}

.page-about .about-axis__item{
  flex: 0 0 auto;
  padding: 7px 12px;
  border: 1px solid var(--yb-line);
  border-radius: 999px;
  font: 500 12px/1 var(--yb-mono);
  letter-spacing: .06em;
  color: var(--yb-muted);
  text-decoration: none;
  white-space: nowrap;
  transition: color .22s var(--yb-ease), border-color .22s var(--yb-ease), background-color .22s var(--yb-ease);
}

.page-about .about-axis__item:hover{
  color: var(--yb-text);
  border-color: var(--yb-cyan);
}

.page-about .about-axis__item.is-active{
  color: var(--yb-ink);
  background: var(--yb-cyan);
  border-color: var(--yb-cyan);
}

.page-about .about-axis__item:focus-visible{
  outline: 2px solid var(--yb-cyan);
  outline-offset: 2px;
}

/* ---------- 章节通用 ---------- */

.page-about .about-block{
  position: relative;
  padding: 34px 0 40px;
  border-top: 1px solid var(--yb-line);
  scroll-margin-top: 88px;
}

.page-about .about-block:first-child{
  border-top: 0;
  padding-top: 6px;
}

.page-about .about-block__index{
  margin: 0 0 10px;
  font: 600 12px/1 var(--yb-mono);
  letter-spacing: .18em;
  color: var(--yb-cyan);
}

.page-about .about-block__title{
  margin: 0;
  max-width: 24ch;
  font-size: clamp(21px, 4vw, 33px);
  font-weight: 800;
  line-height: 1.32;
  letter-spacing: -.01em;
  color: var(--yb-text);
}

.page-about .about-prose{
  margin-top: 16px;
  max-width: 72ch;
}

.page-about .about-block > p,
.page-about .about-prose p{
  margin: 0 0 14px;
  font-size: 16px;
  line-height: 1.78;
  color: rgba(233,246,242,.84);
}

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

/* ---------- 业务范围：Bento ---------- */

.page-about .about-bento{
  display: grid;
  grid-template-columns: minmax(0,1fr);
  gap: 14px;
  margin-top: 26px;
}

.page-about .about-bento__card{
  position: relative;
  padding: 20px 20px 22px;
  border: 1px solid var(--yb-line);
  border-radius: var(--yb-radius);
  background: linear-gradient(162deg, rgba(11,46,40,.97) 0%, rgba(5,32,28,.92) 100%);
  transition: transform .24s var(--yb-ease), border-color .24s var(--yb-ease), box-shadow .24s var(--yb-ease);
}

.page-about .about-bento__card:hover{
  transform: translateY(-2px);
  border-color: var(--yb-cyan);
  box-shadow: 0 0 0 1px rgba(56,242,196,.22);
}

.page-about .about-bento__kicker{
  display: inline-block;
  margin-bottom: 12px;
  font: 500 11px/1 var(--yb-mono);
  letter-spacing: .14em;
  color: var(--yb-cyan);
}

.page-about .about-bento__card h3{
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--yb-text);
}

.page-about .about-bento__card p{
  margin: 0;
  font-size: 15px;
  line-height: 1.74;
  color: var(--yb-muted);
}

/* ---------- 联赛覆盖：统计条 ---------- */

.page-about .about-split{
  display: flex;
  flex-wrap: wrap;
  margin-top: 24px;
  border: 1px solid var(--yb-line);
  border-radius: var(--yb-radius);
  overflow: hidden;
  background: linear-gradient(118deg, rgba(56,242,196,.1) 0%, rgba(11,46,40,.94) 48%);
}

.page-about .about-split__cell{
  flex: 1 1 150px;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 6px;
  padding: 18px 20px;
  border-left: 1px solid var(--yb-line);
  text-align: right;
}

.page-about .about-split__cell:first-child{
  border-left: 0;
}

.page-about .about-split__num{
  font: 700 clamp(30px, 5vw, 42px)/1 var(--yb-mono);
  letter-spacing: -.02em;
  color: var(--yb-cyan);
}

.page-about .about-split__label{
  font-size: 13px;
  line-height: 1.5;
  letter-spacing: .04em;
  color: var(--yb-muted);
}

/* ---------- 图块 ---------- */

.page-about .about-media{
  margin: 26px 0 0;
  border: 1px solid var(--yb-line);
  border-radius: var(--yb-radius);
  overflow: hidden;
  background: linear-gradient(180deg, var(--yb-ink), var(--yb-indigo));
}

.page-about .about-media img{
  width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(.62) contrast(1.06);
}

.page-about .about-media .yb-media__caption{
  padding: 12px 16px 14px;
  border-top: 1px solid var(--yb-line);
  font-size: 13px;
  line-height: 1.65;
  color: var(--yb-muted);
}

.page-about .about-media--mid{
  max-width: 900px;
}

/* ---------- 更新节奏 ---------- */

.page-about .about-rhythm{
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--yb-line);
  border: 1px solid var(--yb-line);
  border-radius: var(--yb-radius);
  overflow: hidden;
}

.page-about .about-rhythm li{
  display: grid;
  gap: 6px;
  padding: 16px 18px;
  background: var(--yb-ink);
}

.page-about .about-rhythm__time{
  font: 600 12px/1.5 var(--yb-mono);
  letter-spacing: .08em;
  color: var(--yb-orange);
}

.page-about .about-rhythm li p{
  margin: 0;
  font-size: 15px;
  line-height: 1.74;
  color: rgba(233,246,242,.82);
}

/* ---------- 发展脉络 ---------- */

.page-about .about-timeline{
  list-style: none;
  margin: 26px 0 0;
  padding: 0 0 0 22px;
  border-left: 1px solid var(--yb-line);
}

.page-about .about-timeline__item{
  position: relative;
  padding-bottom: 26px;
}

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

.page-about .about-timeline__item::before{
  content: "";
  position: absolute;
  left: -27px;
  top: 5px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  border: 2px solid var(--yb-cyan);
  background: var(--yb-ink);
}

.page-about .about-timeline__year{
  display: block;
  margin-bottom: 8px;
  font: 700 13px/1 var(--yb-mono);
  letter-spacing: .1em;
  color: var(--yb-yellow);
}

.page-about .about-timeline__item h3{
  margin: 0 0 6px;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--yb-text);
}

.page-about .about-timeline__item p{
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.74;
  color: var(--yb-muted);
}

/* ---------- 团队分工 ---------- */

.page-about .about-team{
  display: grid;
  grid-template-columns: minmax(0,1fr);
  gap: 1px;
  margin-top: 24px;
  background: var(--yb-line);
  border: 1px solid var(--yb-line);
  border-radius: var(--yb-radius);
  overflow: hidden;
}

.page-about .about-team__cell{
  padding: 20px 18px 22px;
  border-top: 2px solid rgba(56,242,196,.5);
  background: linear-gradient(180deg, rgba(11,46,40,.98), rgba(5,32,28,.98));
}

.page-about .about-team__num{
  display: block;
  font: 700 32px/1 var(--yb-mono);
  letter-spacing: -.02em;
  color: var(--yb-cyan);
}

.page-about .about-team__name{
  display: block;
  margin-top: 10px;
  font-size: 15px;
  font-weight: 700;
  color: var(--yb-text);
}

.page-about .about-team__cell p{
  margin: 8px 0 0;
  font-size: 13px;
  line-height: 1.66;
  color: var(--yb-muted);
}

/* ---------- 合作与认可 ---------- */

.page-about .about-honor{
  margin-top: 26px;
  padding: 24px 20px 22px;
  border: 1px solid var(--yb-line);
  border-radius: var(--yb-radius);
  background:
    radial-gradient(520px 240px at 100% 0%, rgba(56,242,196,.14), transparent 68%),
    linear-gradient(150deg, var(--yb-indigo) 0%, rgba(5,32,28,.95) 74%);
}

.page-about .about-honor__grid{
  display: grid;
  grid-template-columns: minmax(0,1fr);
  gap: 14px;
}

.page-about .about-honor__card{
  position: relative;
  padding: 18px 18px 20px;
  border: 1px solid var(--yb-line);
  border-radius: 12px;
  background: rgba(5,32,28,.55);
  outline: none;
  transition: border-color .24s var(--yb-ease), background-color .24s var(--yb-ease);
}

.page-about .about-honor__card:hover,
.page-about .about-honor__card:focus-visible{
  border-color: var(--yb-cyan);
  background: rgba(11,46,40,.82);
}

.page-about .about-honor__num{
  display: block;
  font: 700 30px/1 var(--yb-mono);
  letter-spacing: -.02em;
  color: var(--yb-yellow);
}

.page-about .about-honor__num--text{
  font-size: 22px;
  letter-spacing: 0;
}

.page-about .about-honor__card h3{
  margin: 12px 0 0;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--yb-text);
}

.page-about .about-honor__note{
  margin: 0;
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  font-size: 13px;
  line-height: 1.66;
  color: var(--yb-muted);
  transition: max-height .3s var(--yb-ease), opacity .3s var(--yb-ease), margin-top .3s var(--yb-ease);
}

.page-about .about-honor__card:hover .about-honor__note,
.page-about .about-honor__card:focus-visible .about-honor__note{
  max-height: 96px;
  opacity: 1;
  margin-top: 8px;
}

/* ---------- 结尾导流 ---------- */

.page-about .about-cta{
  display: grid;
  grid-template-columns: minmax(0,1fr);
  gap: 22px;
  margin-top: 12px;
  padding: 26px 20px 26px;
  border: 1px solid var(--yb-line);
  border-radius: var(--yb-radius);
  background: linear-gradient(122deg, rgba(92,31,51,.6) 0%, rgba(5,32,28,.92) 64%);
  scroll-margin-top: 88px;
}

.page-about .about-cta h2{
  margin: 0 0 10px;
  font-size: clamp(20px, 3.4vw, 26px);
  font-weight: 800;
  line-height: 1.36;
  color: var(--yb-text);
}

.page-about .about-cta p{
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.78;
  color: rgba(233,246,242,.84);
}

.page-about .about-cta p a{
  color: var(--yb-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(56,242,196,.45);
  transition: border-color .2s var(--yb-ease);
}

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

.page-about .about-cta__actions{
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .about-cta__actions a{
  font-size: 13px;
  text-decoration: none;
}

/* ---------- 入场动效 ---------- */

.page-about [data-reveal]{
  opacity: 1;
}

.yb-reveal-ready .page-about [data-reveal]{
  opacity: 0;
  transform: translateY(8px);
  transition: opacity .32s var(--yb-ease), transform .32s var(--yb-ease);
}

.yb-reveal-ready .page-about [data-reveal].is-in{
  opacity: 1;
  transform: none;
}

.page-about .about-team__num,
.page-about .about-honor__num{
  transition: transform .28s var(--yb-ease);
}

.yb-reveal-ready .page-about .about-block.is-in .about-team__num,
.yb-reveal-ready .page-about .about-block.is-in .about-honor__num{
  animation: about-rise .42s var(--yb-ease) both;
}

@keyframes about-rise{
  from{ transform: translateY(6px); }
  to{ transform: translateY(0); }
}

/* ---------- 断点 ---------- */

@media (min-width: 620px){
  .page-about .about-rhythm li{
    grid-template-columns: 132px minmax(0,1fr);
    gap: 18px;
    align-items: baseline;
  }
}

@media (min-width: 760px){
  .page-about{
    --about-gutter: 28px;
  }

  .page-about .about-hero{
    padding: 30px 0 46px;
  }

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

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

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

@media (min-width: 860px){
  .page-about .about-bento{
    grid-template-columns: repeat(12, minmax(0,1fr));
  }

  .page-about .about-bento__card{
    grid-column: span 6;
  }

  .page-about .about-bento__card--wide{
    grid-column: span 12;
  }

  .page-about .about-cta{
    grid-template-columns: minmax(0,1.5fr) minmax(0,1fr);
    align-items: center;
    padding: 34px 30px;
  }

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

@media (min-width: 960px){
  .page-about .about-shell{
    grid-template-columns: var(--about-axis-w) minmax(0,1fr);
    gap: 52px;
    align-items: start;
  }

  .page-about .about-axis{
    position: sticky;
    top: 92px;
    display: block;
    overflow: visible;
    margin: 0;
    padding: 4px 0 4px 14px;
    border-bottom: 0;
    border-left: 1px solid var(--yb-line);
  }

  .page-about .about-axis__item{
    display: block;
    margin-left: -15px;
    padding: 9px 0 9px 13px;
    border: 0;
    border-left: 2px solid transparent;
    border-radius: 0;
    background: none;
    font-size: 12px;
  }

  .page-about .about-axis__item:hover{
    color: var(--yb-text);
    border-color: transparent;
    border-left-color: rgba(56,242,196,.5);
  }

  .page-about .about-axis__item.is-active{
    color: var(--yb-cyan);
    background: none;
    border-color: transparent;
    border-left-color: var(--yb-cyan);
  }

  .page-about .about-block{
    padding: 42px 0 50px;
  }

  .page-about .about-block__title{
    max-width: 26ch;
  }

  .page-about .about-hero__title{
    font-size: clamp(36px, 4.6vw, 58px);
  }
}

@media (min-width: 1180px){
  .page-about .about-bento__card--wide{
    display: grid;
    grid-template-columns: 160px minmax(0,1fr);
    column-gap: 26px;
    align-items: start;
    padding: 24px 26px 26px;
  }

  .page-about .about-bento__card--wide .about-bento__kicker{
    grid-column: 1;
    grid-row: 1;
    margin-bottom: 0;
    padding-top: 5px;
  }

  .page-about .about-bento__card--wide h3{
    grid-column: 2;
    grid-row: 1;
    margin-bottom: 10px;
  }

  .page-about .about-bento__card--wide p{
    grid-column: 2;
    grid-row: 2;
  }
}

@media (prefers-reduced-motion: reduce){
  .page-about *,
  .page-about *::before,
  .page-about *::after{
    transition-duration: .001ms !important;
    animation-duration: .001ms !important;
  }

  .yb-reveal-ready .page-about [data-reveal]{
    opacity: 1;
    transform: none;
  }
}