.page-about{
  background: var(--paper);
  color: var(--ink);
  overflow-x: hidden;
}

.page-about .section{
  padding-block: clamp(48px, 7vw, 96px);
}

.page-about .about-crumb{
  padding-block: clamp(16px, 3vw, 28px) 0;
}

.page-about .about-head{
  max-width: 62ch;
  margin-bottom: clamp(28px, 4vw, 52px);
}

.page-about .about-head--tight{
  margin-bottom: clamp(22px, 3vw, 36px);
}

.page-about .about-hero .eyebrow,
.page-about .about-rules .eyebrow,
.page-about .about-miles-wrap .eyebrow,
.page-about .about-cta .eyebrow{
  color: var(--neon);
}

.page-about .eyebrow{
  font-family: var(--font-mono);
  letter-spacing: .14em;
  text-transform: none;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero{
  position: relative;
  isolation: isolate;
  color: var(--paper);
  background:
    radial-gradient(115% 130% at 88% -10%, rgba(200,255,61,.20) 0%, rgba(200,255,61,0) 58%),
    linear-gradient(158deg, #0A1F17 0%, #111513 82%);
  padding-block: clamp(36px, 6vw, 76px) clamp(46px, 8vw, 104px);
  overflow: clip;
}

.page-about .about-hero::after{
  content: "";
  position: absolute;
  right: -14%;
  bottom: -42%;
  width: min(640px, 78vw);
  aspect-ratio: 1.35;
  background: linear-gradient(118deg, var(--neon) 0%, var(--neon-deep) 100%);
  opacity: .17;
  transform: rotate(-6deg);
  border-radius: 44% 56% 42% 58% / 58% 40% 60% 42%;
  z-index: -1;
  pointer-events: none;
}

.page-about .about-hero__grid{
  display: grid;
  gap: clamp(28px, 5vw, 56px);
  position: relative;
  z-index: 1;
}

.page-about .about-hero__title{
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(46px, 11.5vw, 116px);
  line-height: .94;
  letter-spacing: -.015em;
  margin: .1em 0 .34em;
  color: var(--paper);
}

.page-about .about-hero__title span{
  color: var(--neon);
}

.page-about .about-hero__text{
  max-width: 56ch;
  font-size: clamp(var(--fs-16), 1.1vw + .7rem, var(--fs-18));
  line-height: 1.8;
  color: #d5e2d2;
  margin: 0 0 clamp(22px, 3vw, 32px);
}

.page-about .about-hero__actions{
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* 比分牌 */
.page-about .about-board{
  list-style: none;
  margin: 0;
  padding: 2px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2px;
  background: rgba(200,255,61,.22);
  border-radius: var(--radius-m);
  overflow: hidden;
}

.page-about .about-board__item{
  background: #0C2418;
  padding: clamp(12px, 2.4vw, 18px) clamp(12px, 2.4vw, 20px);
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}

.page-about .about-board__num{
  font-family: var(--font-mono);
  font-size: clamp(26px, 5.6vw, 42px);
  line-height: 1;
  color: var(--neon);
  letter-spacing: -.01em;
  font-variant-numeric: tabular-nums;
}

.page-about .about-board__unit{
  font-size: .5em;
  margin-left: 2px;
  color: var(--neon-deep);
}

.page-about .about-board__label{
  font-size: var(--fs-12);
  color: #9FB4A3;
  letter-spacing: .04em;
}

/* ---------- 起点 ---------- */
.page-about .about-origin__grid{
  display: grid;
  gap: clamp(26px, 4vw, 52px);
  align-items: center;
}

.page-about .about-origin__text .h-section{
  margin-top: .18em;
  margin-bottom: .5em;
}

.page-about .about-origin__text .prose + .prose{
  margin-top: 1em;
}

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

.page-about .img-frame{
  margin: 0;
  position: relative;
  border-radius: var(--radius-m);
  overflow: hidden;
  background: var(--coal);
  box-shadow: var(--shadow-1);
}

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

.page-about .img-frame::after{
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 4px;
  background: linear-gradient(90deg, var(--neon) 0%, var(--red) 42%, var(--amber) 100%);
}

.page-about .img-frame__caption{
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: .04em;
  line-height: 1.6;
  padding: 12px 16px 14px;
  color: #A9B9AC;
  background: #0C2418;
  margin: 0;
}

/* ---------- 三条原则 ---------- */
.page-about .about-rules .lede{
  color: #BFCFC0;
}

.page-about .about-rules__list{
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(16px, 2.4vw, 26px);
}

.page-about .about-rule{
  background: rgba(243,246,236,.045);
  border: 1px solid rgba(200,255,61,.24);
  border-radius: var(--radius-m);
  padding: clamp(20px, 3vw, 32px);
  transition: transform .3s var(--ease), border-color .3s var(--ease), box-shadow .3s var(--ease), background-color .3s var(--ease);
}

.page-about .about-rule:hover,
.page-about .about-rule:focus-within{
  transform: translateY(-4px);
  border-color: var(--neon);
  background: rgba(243,246,236,.075);
  box-shadow: var(--shadow-2);
}

.page-about .about-rule__badge{
  display: block;
  width: 42px;
  height: 42px;
  color: var(--neon);
  margin-bottom: 16px;
}

.page-about .about-rule__tag{
  font-size: var(--fs-12);
  letter-spacing: .12em;
  color: var(--amber);
  margin: 0 0 8px;
}

.page-about .about-rules .h-card{
  color: var(--paper);
  font-size: clamp(var(--fs-18), 1.4vw + .7rem, var(--fs-24));
  margin: 0 0 .6em;
  line-height: 1.35;
}

.page-about .about-rule__lead{
  margin: 0;
  color: #C6D4C5;
  font-size: var(--fs-16);
  line-height: 1.78;
}

.page-about .about-rule__more{
  margin: 0;
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  color: #93A896;
  font-size: var(--fs-14);
  line-height: 1.7;
  transition: max-height .4s var(--ease), opacity .3s var(--ease), margin-top .4s var(--ease);
}

.page-about .about-rule:hover .about-rule__more,
.page-about .about-rule:focus-within .about-rule__more{
  max-height: 9em;
  opacity: 1;
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px dashed rgba(200,255,61,.35);
}

@media (hover: none){
  .page-about .about-rule__more{
    max-height: none;
    opacity: 1;
    margin-top: 14px;
    padding-top: 14px;
    border-top: 1px dashed rgba(200,255,61,.3);
  }
}

/* ---------- 内容流程 ---------- */
.page-about .about-flow__grid{
  display: grid;
  gap: clamp(26px, 4vw, 52px);
  align-items: start;
}

.page-about .about-flow__body .h-section{
  margin-top: .18em;
  margin-bottom: clamp(20px, 3vw, 32px);
}

.page-about .about-steps{
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(14px, 2vw, 20px);
}

.page-about .about-steps li{
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  column-gap: 14px;
  row-gap: 4px;
  padding-bottom: clamp(14px, 2vw, 20px);
  border-bottom: 1px solid rgba(10,31,23,.12);
}

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

.page-about .about-steps__idx{
  grid-column: 1;
  grid-row: 1 / span 2;
  font-size: var(--fs-14);
  letter-spacing: .08em;
  color: var(--green);
  padding-top: 3px;
}

.page-about .about-steps h3{
  grid-column: 2;
  grid-row: 1;
  margin: 0;
  font-family: var(--font-display);
  font-size: var(--fs-24);
  line-height: 1.2;
  color: var(--ink);
}

.page-about .about-steps p{
  grid-column: 2;
  grid-row: 2;
  margin: 0;
  font-size: var(--fs-16);
  line-height: 1.75;
  color: #2C3A32;
}

/* ---------- 团队 ---------- */
.page-about .about-team__grid{
  display: grid;
  gap: clamp(24px, 3.6vw, 44px);
  align-items: start;
}

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

.page-about .about-team__stats li{
  background: var(--paper);
  padding: clamp(16px, 2.6vw, 24px);
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}

.page-about .about-team__stats li:first-child{
  grid-column: span 2;
  background: var(--ink);
}

.page-about .about-team__num{
  font-family: var(--font-mono);
  font-size: clamp(34px, 6vw, 52px);
  line-height: 1;
  color: var(--green);
  font-variant-numeric: tabular-nums;
}

.page-about .about-team__stats li:first-child .about-team__num{
  color: var(--neon);
}

.page-about .about-team__label{
  font-size: var(--fs-16);
  font-weight: 700;
  color: var(--ink);
}

.page-about .about-team__stats li:first-child .about-team__label{
  color: var(--paper);
}

.page-about .about-team__desc{
  font-size: var(--fs-14);
  line-height: 1.6;
  color: var(--sage);
}

.page-about .about-team__stats li:first-child .about-team__desc{
  color: #A9B9AC;
}

.page-about .about-team__figure img{
  border-radius: var(--radius-m);
}

.page-about .about-team__authors{
  border-left: 3px solid var(--neon-deep);
  padding-left: clamp(16px, 2.4vw, 24px);
}

.page-about .about-team__authors-num{
  font-size: var(--fs-14);
  letter-spacing: .1em;
  color: var(--red);
  margin: 0 0 10px;
}

.page-about .about-team__authors .prose{
  margin: 0;
  color: #2C3A32;
}

/* ---------- 里程碑 ---------- */
.page-about .about-miles-wrap .lede{
  color: #BFCFC0;
}

.page-about .about-miles{
  list-style: none;
  margin: 0;
  padding: 0;
  max-width: 78ch;
}

.page-about .about-mile{
  position: relative;
  padding: 0 0 clamp(28px, 4vw, 44px) clamp(22px, 3.4vw, 34px);
  border-left: 2px dashed rgba(200,255,61,.32);
}

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

.page-about .about-mile::before{
  content: "";
  position: absolute;
  left: -9px;
  top: 12px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--neon);
  box-shadow: 0 0 0 5px rgba(200,255,61,.14);
}

.page-about .about-mile__year{
  display: block;
  font-family: var(--font-display);
  font-size: clamp(38px, 8vw, 68px);
  line-height: 1;
  letter-spacing: .02em;
  color: transparent;
  -webkit-text-stroke: 1.4px var(--neon);
  margin-bottom: 6px;
}

.page-about .about-miles-wrap .h-card{
  color: var(--paper);
  font-size: clamp(var(--fs-18), 1.3vw + .7rem, var(--fs-24));
  margin: 0 0 .5em;
  line-height: 1.35;
}

.page-about .about-mile p{
  margin: 0;
  color: #C0CFC1;
  font-size: var(--fs-16);
  line-height: 1.78;
  max-width: 60ch;
}

/* ---------- 合作生态 ---------- */
.page-about .about-eco__inner{
  display: grid;
  gap: clamp(24px, 4vw, 52px);
  align-items: start;
}

.page-about .about-eco .eyebrow{
  color: var(--amber);
}

.page-about .about-eco .h-section{
  color: var(--paper);
  margin-top: .18em;
}

.page-about .about-eco__text{
  margin: 1em 0 0;
  max-width: 56ch;
  color: #B9C7BA;
  font-size: var(--fs-16);
  line-height: 1.8;
}

.page-about .about-eco__marks{
  list-style: none;
  margin: 0 0 20px;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .about-eco__marks li{
  font-family: var(--font-mono);
  font-size: var(--fs-14);
  letter-spacing: .08em;
  color: var(--neon);
  border: 1px solid rgba(200,255,61,.38);
  border-radius: 999px;
  padding: 10px 18px;
  background: rgba(200,255,61,.06);
}

.page-about .about-eco__honor{
  margin: 0;
  padding-left: 14px;
  border-left: 3px solid var(--red);
  color: #D6E2D4;
  font-size: var(--fs-16);
  line-height: 1.7;
}

/* ---------- 收束 ---------- */
.page-about .about-cta__inner{
  display: grid;
  gap: clamp(24px, 4vw, 48px);
  align-items: start;
}

.page-about .about-cta .h-section{
  color: var(--paper);
  margin-top: .18em;
}

.page-about .about-cta .prose{
  color: #C0CFC1;
  max-width: 58ch;
  margin-top: 1em;
}

.page-about .about-cta__links{
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
  background: rgba(200,255,61,.2);
  border-radius: var(--radius-m);
  overflow: hidden;
}

.page-about .about-cta__links li{
  background: #0C2418;
}

.page-about .about-cta__links .link-arrow{
  display: block;
  padding: clamp(14px, 2.4vw, 20px) clamp(16px, 3vw, 26px);
  color: var(--paper);
  text-decoration: none;
  font-size: var(--fs-16);
  border-left: 3px solid transparent;
  transition: background-color .28s var(--ease), border-color .28s var(--ease), padding-left .28s var(--ease);
}

.page-about .about-cta__links .link-arrow:hover,
.page-about .about-cta__links .link-arrow:focus-visible{
  background: rgba(200,255,61,.12);
  border-left-color: var(--neon);
  padding-left: clamp(22px, 3.6vw, 34px);
}

.page-about a:focus-visible,
.page-about button:focus-visible{
  outline: 2px solid var(--neon);
  outline-offset: 2px;
}

/* ---------- 平板 / 桌面 ---------- */
@media (min-width: 760px){
  .page-about .about-hero__grid{
    grid-template-columns: minmax(0, 1.5fr) minmax(0, .8fr);
    align-items: end;
  }

  .page-about .about-board{
    align-self: end;
  }

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

  .page-about .about-rule:nth-child(2){
    margin-top: 44px;
  }

  .page-about .about-rule:nth-child(3){
    margin-top: 16px;
  }

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

  .page-about .about-team__stats li:first-child{
    grid-column: span 1;
  }

  .page-about .about-eco__inner{
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
  }

  .page-about .about-cta__inner{
    grid-template-columns: minmax(0, 1fr) minmax(0, .85fr);
  }
}

@media (min-width: 980px){
  .page-about .about-origin__grid{
    grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr);
  }

  .page-about .about-flow__grid{
    grid-template-columns: minmax(0, .82fr) minmax(0, 1.18fr);
  }

  .page-about .about-team__grid{
    grid-template-columns: minmax(0, 1fr) minmax(0, .95fr);
    grid-template-areas:
      "stats figure"
      "authors figure";
    align-items: start;
  }

  .page-about .about-team__stats{ grid-area: stats; }
  .page-about .about-team__figure{ grid-area: figure; margin: 0; }
  .page-about .about-team__authors{ grid-area: authors; }

  .page-about .about-mile{
    padding-bottom: clamp(34px, 3vw, 52px);
  }
}

@media (prefers-reduced-motion: reduce){
  .page-about .about-rule,
  .page-about .about-rule__more,
  .page-about .about-cta__links .link-arrow{
    transition: none;
  }
  .page-about .about-rule:hover,
  .page-about .about-rule:focus-within{
    transform: none;
  }
}
<<<END>>>