.page-about{
  --ab-rail-w: 208px;
  --ab-gap: 52px;
}

.page-about .about-crumb-sep{
  margin: 0 8px;
  color: var(--od-line);
}

/* ---------- 首屏 ---------- */
.page-about .about-intro{
  position: relative;
  padding-top: 26px;
  padding-bottom: 6px;
  overflow: hidden;
}

.page-about .about-intro__poster{
  position: absolute;
  right: -6px;
  top: -46px;
  font-family: var(--od-font-mono);
  font-size: clamp(84px, 19vw, 186px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.05em;
  color: var(--od-blue);
  opacity: .13;
  pointer-events: none;
  user-select: none;
}

.page-about .about-intro__title{
  position: relative;
  max-width: 15em;
  margin: 14px 0 18px;
  font-size: clamp(29px, 6.2vw, 58px);
  line-height: 1.12;
  letter-spacing: -.01em;
}

.page-about .about-intro__lede{
  position: relative;
  max-width: 62ch;
  margin: 0;
}

/* ---------- 主体网格 ---------- */
.page-about .about-body{
  display: grid;
  grid-template-columns: 1fr;
  gap: 34px;
  margin-top: 30px;
  padding-bottom: 64px;
}

/* ---------- 左栏索引脊线 ---------- */
.page-about .about-rail{
  display: none;
}

.page-about .about-rail__cap{
  display: block;
  font-family: var(--od-font-mono);
  font-size: 11.5px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--od-mute);
  margin-bottom: 16px;
}

.page-about .about-rail__list{
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.page-about .about-rail__link{
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 7px 0;
  font-size: 14px;
  line-height: 1.5;
  color: var(--od-mute);
  text-decoration: none;
  transition: color .2s var(--od-ease);
}

.page-about .about-rail__link::before{
  content: "";
  position: absolute;
  left: -23px;
  top: 14px;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: var(--od-line);
  transition: background .2s var(--od-ease), transform .2s var(--od-ease);
}

.page-about .about-rail__link:hover,
.page-about .about-rail__link:focus-visible{
  color: var(--od-white);
}

.page-about .about-rail__link:hover::before,
.page-about .about-rail__link:focus-visible::before{
  background: var(--od-orange);
  transform: scale(1.3);
}

.page-about .about-rail__num{
  font-family: var(--od-font-mono);
  font-size: 11.5px;
  color: var(--od-blue);
}

/* ---------- 章节流 ---------- */
.page-about .about-chapters{
  display: flex;
  flex-direction: column;
  gap: 56px;
  min-width: 0;
}

.page-about .about-chapter{
  position: relative;
  padding-left: 16px;
  min-width: 0;
}

.page-about .about-chapter::before{
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  bottom: 4px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--od-blue), rgba(0,87,255,0));
}

.page-about .about-chapter .od-section__head{
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 14px;
}

.page-about .about-chapter__lede{
  max-width: 62ch;
  margin: 0 0 22px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--od-mute);
}

.page-about .about-chapter__tail{
  margin: 22px 0 0;
  max-width: 62ch;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--od-mute);
}

.page-about .about-chapter a{
  color: var(--od-blue);
  text-decoration: underline;
  text-underline-offset: 3px;
}

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

/* ---------- 01 使用者 ---------- */
.page-about .about-users{
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .about-user{
  position: relative;
  padding: 18px 20px 18px 22px;
  background: var(--od-panel);
  border: 1px solid var(--od-line);
  border-radius: var(--od-r-md);
}

.page-about .about-user::before{
  content: "";
  position: absolute;
  left: 0;
  top: 16px;
  bottom: 16px;
  width: 3px;
  border-radius: 0 3px 3px 0;
  background: var(--od-blue);
}

.page-about .about-user:nth-child(2n)::before{
  background: var(--od-orange);
}

.page-about .about-user h3{
  margin: 0 0 8px;
  font-size: 17px;
}

.page-about .about-user p{
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--od-mute);
}

/* ---------- 02 规模 ---------- */
.page-about .about-hero-num{
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 14px;
  padding: 22px 22px 24px;
  margin-bottom: 20px;
  border: 1px solid var(--od-line);
  border-radius: var(--od-r-lg);
  background: linear-gradient(118deg, rgba(0,87,255,.18), rgba(255,107,0,.11) 78%, rgba(20,27,36,0) 100%);
}

.page-about .about-hero-num__value{
  font-family: var(--od-font-mono);
  font-size: clamp(54px, 13vw, 112px);
  font-weight: 700;
  line-height: .92;
  letter-spacing: -.04em;
  color: var(--od-white);
}

.page-about .about-hero-num__unit{
  font-family: var(--od-font-mono);
  font-size: 17px;
  color: var(--od-mute);
}

.page-about .about-hero-num__label{
  flex: 1 1 240px;
  min-width: 210px;
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--od-mute);
}

.page-about .about-stats{
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.page-about .about-stats .od-stat{
  padding: 15px 16px 17px;
  background: var(--od-panel-deep);
  border: 1px solid var(--od-line);
  border-radius: var(--od-r-md);
}

.page-about .about-stats .od-stat__num{
  font-family: var(--od-font-mono);
  font-size: 26px;
  font-weight: 700;
  line-height: 1.1;
  color: var(--od-white);
}

.page-about .about-stats .od-stat__label{
  display: block;
  margin-top: 5px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--od-mute);
}

/* ---------- 03 批次号 ---------- */
.page-about .about-batch{
  display: grid;
  gap: 24px;
}

.page-about .about-batch__copy p{
  margin: 0 0 14px;
  font-size: 15.5px;
  line-height: 1.82;
  color: var(--od-mute);
}

.page-about .about-keys{
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  border-top: 1px solid var(--od-line);
}

.page-about .about-keys li{
  display: flex;
  flex-wrap: wrap;
  gap: 6px 14px;
  padding: 12px 0;
  border-bottom: 1px solid var(--od-line);
  font-size: 15px;
  line-height: 1.72;
  color: var(--od-mute);
}

.page-about .about-keys__k{
  flex: 0 0 74px;
  padding-top: 2px;
  font-family: var(--od-font-mono);
  font-size: 12.5px;
  letter-spacing: .04em;
  color: var(--od-blue);
}

.page-about .about-batch__media{
  margin: 0;
  border: 1px solid var(--od-line);
  border-radius: var(--od-r-md);
  overflow: hidden;
}

/* ---------- 04 团队 ---------- */
.page-about .about-team{
  display: grid;
  gap: 12px;
  margin-bottom: 22px;
}

.page-about .about-role{
  position: relative;
  overflow: hidden;
  padding: 22px 22px 24px;
  background: var(--od-panel);
  border: 1px solid var(--od-line);
  border-radius: var(--od-r-md);
}

.page-about .about-role::after{
  content: "";
  position: absolute;
  right: -34px;
  bottom: -34px;
  width: 112px;
  height: 112px;
  border-radius: 50%;
  background: var(--od-blue);
  opacity: .14;
}

.page-about .about-role--data::after{
  background: var(--od-orange);
}

.page-about .about-role--tech::after{
  background: var(--od-green);
}

.page-about .about-role__num{
  position: relative;
  display: block;
  margin-bottom: 10px;
  font-family: var(--od-font-mono);
  font-size: 44px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.03em;
  color: var(--od-white);
}

.page-about .about-role__unit{
  margin-left: 5px;
  font-size: 14px;
  color: var(--od-mute);
}

.page-about .about-role h3{
  position: relative;
  margin: 0 0 8px;
  font-size: 16.5px;
  color: var(--od-white);
}

.page-about .about-role p{
  position: relative;
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--od-mute);
}

.page-about .about-team__media{
  margin: 0;
  border: 1px solid var(--od-line);
  border-radius: var(--od-r-md);
  overflow: hidden;
}

/* ---------- 05 赛季节点 ---------- */
.page-about .about-era-jump{
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 22px;
}

.page-about .about-era-jump__item{
  padding: 6px 14px;
  font-family: var(--od-font-mono);
  font-size: 12.5px;
  letter-spacing: .04em;
  color: var(--od-mute);
  text-decoration: none;
  border: 1px solid var(--od-line);
  border-radius: 999px;
  transition: color .2s var(--od-ease), background-color .2s var(--od-ease), border-color .2s var(--od-ease);
}

.page-about .about-era-jump__item:hover{
  color: var(--od-ink);
  background: var(--od-orange);
  border-color: var(--od-orange);
}

.page-about .about-era-poster{
  margin: 0 0 26px;
  border: 1px solid var(--od-line);
  border-radius: var(--od-r-md);
  overflow: hidden;
}

.page-about .about-eras{
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-eras::before{
  content: "";
  position: absolute;
  left: 7px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--od-blue), var(--od-orange));
}

.page-about .about-era{
  position: relative;
  padding: 0 0 26px 34px;
}

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

.page-about .about-era__dot{
  position: absolute;
  left: 0;
  top: 5px;
  width: 16px;
  height: 16px;
  border-radius: 4px;
  background: var(--od-ink);
  border: 2px solid var(--od-blue);
  transition: background-color .2s var(--od-ease), border-color .2s var(--od-ease);
}

.page-about .about-era:nth-child(2n) .about-era__dot{
  border-color: var(--od-orange);
}

.page-about .about-era:target .about-era__dot{
  background: var(--od-orange);
  border-color: var(--od-orange);
}

.page-about .about-era__year{
  display: block;
  margin-bottom: 6px;
  font-family: var(--od-font-mono);
  font-size: 12.5px;
  letter-spacing: .07em;
  color: var(--od-mute);
}

.page-about .about-era h3{
  margin: 0 0 6px;
  font-size: 17px;
  color: var(--od-white);
}

.page-about .about-era p{
  max-width: 58ch;
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--od-mute);
}

/* ---------- 06 核录流程 ---------- */
.page-about .about-flow{
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  list-style: none;
  margin: 0 0 20px;
  padding: 0;
}

.page-about .about-flow .od-path__dot{
  font-family: var(--od-font-mono);
  font-weight: 700;
}

.page-about .about-fold{
  padding: 16px 18px;
  border: 1px solid var(--od-line);
  border-radius: var(--od-r-md);
  background: var(--od-panel-deep);
}

.page-about .about-fold .od-fold__body p{
  margin: 0 0 12px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--od-mute);
}

.page-about .about-fold .od-fold__body p:last-child{
  margin-bottom: 0;
}

.page-about .about-fold .od-fold__body strong{
  color: var(--od-white);
  font-weight: 700;
}

/* ---------- 07 合作生态 ---------- */
.page-about .about-partners{
  display: grid;
  gap: 12px;
}

.page-about .about-partner-card{
  padding: 22px;
  background: var(--od-panel);
  border: 1px solid var(--od-line);
  border-radius: var(--od-r-md);
  border-left: 3px solid var(--od-blue);
}

.page-about .about-partner-card:last-child{
  border-left-color: var(--od-orange);
}

.page-about .about-partner-card h3{
  margin: 0 0 10px;
  font-size: 16.5px;
  color: var(--od-white);
}

.page-about .about-partner-card p{
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--od-mute);
}

/* ---------- 08 联络 ---------- */
.page-about .about-contact{
  margin: 0 0 22px;
  border-top: 1px solid var(--od-line);
}

.page-about .about-contact__line{
  display: flex;
  flex-wrap: wrap;
  gap: 4px 16px;
  margin: 0;
  padding: 13px 0;
  border-bottom: 1px solid var(--od-line);
  font-size: 15.5px;
  line-height: 1.7;
  color: var(--od-white);
}

.page-about .about-contact__k{
  flex: 0 0 88px;
  padding-top: 2px;
  font-family: var(--od-font-mono);
  font-size: 12.5px;
  letter-spacing: .06em;
  color: var(--od-mute);
}

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

/* ---------- 媒体通用 ---------- */
.page-about .od-media img{
  display: block;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 桌面 ---------- */
@media (min-width: 1000px){
  .page-about .about-body{
    grid-template-columns: var(--ab-rail-w) minmax(0, 1fr);
    gap: var(--ab-gap);
    margin-top: 48px;
  }

  .page-about .about-rail{
    display: block;
    position: sticky;
    top: 128px;
    align-self: start;
    padding-left: 24px;
  }

  .page-about .about-rail::before{
    content: "";
    position: absolute;
    left: 5px;
    top: 40px;
    bottom: 6px;
    width: 2px;
    border-radius: 2px;
    background: linear-gradient(180deg, var(--od-blue), var(--od-orange));
  }

  .page-about .about-chapter{
    padding-left: 0;
  }

  .page-about .about-chapter::before{
    display: none;
  }

  .page-about .about-intro__poster{
    top: -58px;
  }
}

@media (min-width: 760px){
  .page-about .about-users{
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }

  .page-about .about-stats{
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 12px;
  }

  .page-about .about-team{
    grid-template-columns: 1.28fr 1fr .92fr;
  }

  .page-about .about-partners{
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
  }

  .page-about .about-batch{
    grid-template-columns: minmax(0, 1fr) 300px;
    gap: 32px;
    align-items: start;
  }

  .page-about .about-keys__k{
    flex-basis: 88px;
  }
}

@media (min-width: 860px){
  .page-about .about-flow{
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 18px;
  }
}
<<<END>>>