.page-about{
  --about-pad-lg: clamp(2.5rem, 6vw, 5.5rem);
  --about-pad-sm: clamp(1.25rem, 3vw, 2.25rem);
  --about-card-bg: rgba(3, 11, 26, .55);
  --about-soft-text: rgba(234, 242, 255, .74);
  position: relative;
  padding-left: var(--vh-rail);
  background: var(--vh-deep);
  color: var(--vh-mist);
  font-family: var(--vh-font-body);
  font-size: 16px;
  line-height: 1.7;
  overflow-x: clip;
}

@media (max-width: 1023px){
  .page-about{ padding-left: 0; }
}

.page-about .about-inner{
  width: 100%;
  max-width: var(--vh-max);
  margin-inline: auto;
  padding-inline: var(--vh-gutter);
}

.page-about .about-crumb{
  padding-top: clamp(1rem, 3vw, 2rem);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero{
  position: relative;
  padding-block: clamp(.75rem, 2.5vw, 1.75rem) clamp(2rem, 5vw, 3.5rem);
}

.page-about .about-hero::before{
  content: "";
  position: absolute;
  top: -12%;
  right: -10%;
  width: min(74%, 780px);
  height: 136%;
  background:
    radial-gradient(circle at 28% 14%, rgba(58, 30, 110, .92), transparent 62%),
    linear-gradient(140deg, rgba(38, 224, 214, .2) 0%, rgba(14, 107, 116, .18) 44%, rgba(255, 138, 61, .16) 100%);
  clip-path: polygon(30% 0, 100% 0, 100% 100%, 0 74%);
  z-index: 0;
  pointer-events: none;
}

.page-about .about-hero::after{
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(143, 163, 199, .07) 1px, transparent 1px);
  background-size: 100% 48px;
  -webkit-mask-image: linear-gradient(180deg, #000 0%, transparent 72%);
  mask-image: linear-gradient(180deg, #000 0%, transparent 72%);
  z-index: 0;
  pointer-events: none;
}

.page-about .about-hero__grid{
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(2rem, 4vw, 3rem);
}

@media (min-width: 900px){
  .page-about .about-hero__grid{
    grid-template-columns: minmax(0, 1.42fr) minmax(0, .58fr);
    align-items: end;
  }
}

.page-about .about-hero__lead .vh-title{ margin-block: .6rem 1.1rem; }

.page-about .about-hero__actions{
  display: flex;
  flex-wrap: wrap;
  gap: .7rem;
  margin-top: clamp(1.4rem, 3vw, 2.1rem);
}

.page-about .about-hero__figure{
  display: grid;
  gap: .6rem;
}

.page-about .about-fig{
  display: grid;
  gap: .15rem;
  padding: .85rem 1rem;
  border: 1px solid var(--vh-line);
  border-left: 2px solid var(--vh-cyan);
  background: var(--about-card-bg);
}

.page-about .about-fig:nth-child(2){ border-left-color: var(--vh-orange); }
.page-about .about-fig:nth-child(3){ border-left-color: var(--vh-teal); }

@media (min-width: 620px){
  .page-about .about-fig:nth-child(2){ margin-left: 1rem; }
  .page-about .about-fig:nth-child(3){ margin-left: 2rem; }
}

.page-about .about-fig__num{
  font-family: var(--vh-font-mono);
  font-size: 1.55rem;
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -.01em;
  color: var(--vh-orange);
}

.page-about .about-fig__label{
  font-size: .8rem;
  line-height: 1.5;
  color: var(--vh-steel);
}

/* ---------- 章节索引 ---------- */
.page-about .about-index{
  position: relative;
  z-index: 1;
  display: flex;
  gap: .5rem;
  overflow-x: auto;
  padding-top: clamp(1.5rem, 3vw, 2.4rem);
  scrollbar-width: thin;
}

.page-about .about-index a{
  flex: 0 0 auto;
  font-family: var(--vh-font-mono);
  font-size: .73rem;
  letter-spacing: .08em;
  color: var(--vh-steel);
  text-decoration: none;
  border: 1px solid var(--vh-line);
  padding: .34rem .68rem;
  transition: color .2s var(--vh-ease), border-color .2s var(--vh-ease);
}

.page-about .about-index a:hover,
.page-about .about-index a:focus-visible{
  color: var(--vh-cyan);
  border-color: var(--vh-cyan);
}

/* ---------- 发展脉络 ---------- */
.page-about .about-path{
  padding-block: var(--about-pad-lg);
  border-top: 1px solid var(--vh-line);
  background: linear-gradient(180deg, rgba(58, 30, 110, .18), transparent 62%);
}

.page-about .about-path__head{
  display: grid;
  gap: .7rem;
  max-width: 46rem;
}

.page-about .about-path__intro{
  margin: 0;
  max-width: 62ch;
  color: var(--vh-steel);
}

.page-about .about-timeline{
  list-style: none;
  position: relative;
  margin: clamp(2rem, 4vw, 3rem) 0 0;
  padding: 0;
  display: grid;
  gap: clamp(1.5rem, 3vw, 2.25rem);
}

.page-about .about-timeline::before{
  content: "";
  position: absolute;
  left: 5px;
  top: .8rem;
  bottom: .8rem;
  width: 1px;
  background: linear-gradient(180deg, var(--vh-cyan), rgba(58, 30, 110, .7) 55%, var(--vh-orange));
  opacity: .72;
}

.page-about .about-timeline__item{
  position: relative;
  padding-left: 1.9rem;
}

.page-about .about-timeline__item::before{
  content: "";
  position: absolute;
  left: 0;
  top: .55rem;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--vh-deep);
  border: 1px solid var(--vh-cyan);
  box-shadow: 0 0 0 4px rgba(38, 224, 214, .1);
}

.page-about .about-timeline__year{
  display: block;
  font-family: var(--vh-font-mono);
  font-size: clamp(1.4rem, 3vw, 1.85rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: .05em;
  color: var(--vh-orange);
  margin-bottom: .35rem;
}

.page-about .about-timeline__title{
  margin: 0 0 .4rem;
  font-size: clamp(1.08rem, 2vw, 1.28rem);
  font-weight: 700;
  letter-spacing: .01em;
}

.page-about .about-timeline__text{
  margin: 0;
  max-width: 60ch;
  font-size: .94rem;
  color: var(--about-soft-text);
}

.page-about .about-timeline__tags{
  display: flex;
  flex-wrap: wrap;
  gap: .4rem;
  margin: .75rem 0 0;
}

@media (min-width: 860px){
  .page-about .about-timeline::before{ left: 6.8rem; }

  .page-about .about-timeline__item{
    display: grid;
    grid-template-columns: 5.5rem minmax(0, 1fr);
    column-gap: 2.6rem;
    padding-left: 0;
  }

  .page-about .about-timeline__item::before{
    left: calc(6.8rem - 5.5px);
    top: .6rem;
  }
}

.page-about .about-figure{
  margin: clamp(2rem, 4vw, 3rem) 0 0;
  border: 1px solid var(--vh-line);
  background: linear-gradient(150deg, rgba(14, 107, 116, .3), rgba(3, 11, 26, .78));
  overflow: hidden;
}

.page-about .about-figure img{
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 12 / 7;
  object-fit: cover;
  opacity: .85;
}

.page-about .about-figure figcaption{
  padding: .7rem 1rem;
  border-top: 1px solid var(--vh-line);
  font-family: var(--vh-font-mono);
  font-size: .73rem;
  letter-spacing: .03em;
  color: var(--vh-steel);
}

/* ---------- 团队分工 ---------- */
.page-about .about-team{
  padding-block: var(--about-pad-lg);
  border-top: 1px solid var(--vh-line);
}

.page-about .about-team__head{
  display: grid;
  gap: .7rem;
  max-width: 48rem;
}

.page-about .about-team__intro{
  margin: 0;
  max-width: 62ch;
  color: var(--vh-steel);
}

.page-about .about-team__cards{
  display: grid;
  gap: 1rem;
  margin-top: clamp(1.75rem, 4vw, 2.75rem);
}

.page-about .about-team__card{
  padding: clamp(1.1rem, 2.5vw, 1.55rem);
  border: 1px solid var(--vh-line);
  border-top: 2px solid var(--vh-cyan);
  background: var(--about-card-bg);
}

.page-about .about-team__card:nth-child(2){ border-top-color: var(--vh-orange); }
.page-about .about-team__card:nth-child(3){ border-top-color: var(--vh-teal); }

.page-about .about-team__card h3{
  margin: 0 0 .55rem;
  font-size: 1.14rem;
  font-weight: 700;
  letter-spacing: .01em;
}

.page-about .about-team__card p{
  margin: 0;
  font-size: .92rem;
  color: var(--about-soft-text);
}

.page-about .about-team__tags{
  display: flex;
  flex-wrap: wrap;
  gap: .4rem;
  margin-top: .9rem;
}

@media (min-width: 760px){
  .page-about .about-team__cards{ grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .page-about .about-team__card:nth-child(2){ margin-top: 1.5rem; }
  .page-about .about-team__card:nth-child(3){ margin-top: 3rem; }
}

.page-about .about-team__lower{
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.5rem);
  margin-top: clamp(1.75rem, 4vw, 2.75rem);
}

@media (min-width: 860px){
  .page-about .about-team__lower{
    grid-template-columns: minmax(0, .88fr) minmax(0, 1.12fr);
    align-items: start;
  }
}

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

.page-about .about-team__media img{
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  opacity: .8;
}

.page-about .about-team__subtitle{
  margin: 0 0 .25rem;
  font-size: .82rem;
  font-weight: 600;
  letter-spacing: .16em;
  color: var(--vh-steel);
}

.page-about .about-std-list{
  list-style: none;
  margin: .9rem 0 0;
  padding: 0;
  display: grid;
  gap: .8rem;
}

.page-about .about-std{
  padding: .85rem 1rem;
  border-left: 1px solid var(--vh-line-strong);
  background: linear-gradient(90deg, rgba(38, 224, 214, .08), transparent 72%);
}

.page-about .about-std__num{
  display: inline-block;
  font-family: var(--vh-font-mono);
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--vh-cyan);
}

.page-about .about-std__label{
  display: inline-block;
  margin-left: .5rem;
  font-size: .76rem;
  letter-spacing: .14em;
  color: var(--vh-steel);
}

.page-about .about-std__text{
  margin: .28rem 0 0;
  font-size: .89rem;
  color: var(--about-soft-text);
}

/* ---------- 天津锚点 ---------- */
.page-about .about-city{
  padding-block: var(--about-pad-lg);
  border-top: 1px solid var(--vh-line);
  background: radial-gradient(circle at 80% 28%, rgba(58, 30, 110, .48), transparent 58%);
}

.page-about .about-city__grid{
  display: grid;
  gap: clamp(1.75rem, 4vw, 3rem);
}

@media (min-width: 900px){
  .page-about .about-city__grid{
    grid-template-columns: minmax(0, 1.06fr) minmax(0, .94fr);
    align-items: center;
  }
}

.page-about .about-city__intro{
  margin: .7rem 0 0;
  max-width: 58ch;
  color: var(--about-soft-text);
}

.page-about .about-city__points{
  list-style: none;
  margin: clamp(1.25rem, 3vw, 1.75rem) 0 0;
  padding: 0;
  display: grid;
  gap: .85rem;
}

.page-about .about-city__points li{
  position: relative;
  padding-left: 1rem;
  font-size: .92rem;
  color: var(--about-soft-text);
}

.page-about .about-city__points li::before{
  content: "";
  position: absolute;
  left: 0;
  top: .62em;
  width: 5px;
  height: 5px;
  background: var(--vh-orange);
  transform: rotate(45deg);
}

.page-about .about-city__points strong{
  display: block;
  margin-bottom: .1rem;
  font-size: .98rem;
  font-weight: 600;
  color: var(--vh-mist);
}

.page-about .about-city__media{
  position: relative;
  margin: 0;
  border: 1px solid var(--vh-line-strong);
  overflow: hidden;
}

.page-about .about-city__media img{
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  opacity: .78;
}

.page-about .about-city__media::after{
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(200deg, rgba(8, 27, 58, .12), rgba(3, 11, 26, .78));
  pointer-events: none;
}

/* ---------- 合作生态 ---------- */
.page-about .about-eco{
  padding-block: var(--about-pad-lg);
  border-top: 1px solid var(--vh-line);
}

.page-about .about-eco__head{
  display: grid;
  gap: .7rem;
  max-width: 48rem;
}

.page-about .about-eco__head p{
  margin: 0;
  max-width: 62ch;
  color: var(--about-soft-text);
}

.page-about .about-eco__tree{
  margin-top: clamp(1.75rem, 4vw, 2.5rem);
  display: grid;
  gap: clamp(1.25rem, 3vw, 2rem);
}

@media (min-width: 860px){
  .page-about .about-eco__tree{
    grid-template-columns: minmax(0, .42fr) minmax(0, .58fr);
    align-items: center;
  }
}

.page-about .about-eco__hub{
  position: relative;
  display: grid;
  gap: .35rem;
  padding: clamp(1.4rem, 4vw, 2.35rem);
  border: 1px solid var(--vh-line-strong);
  background: radial-gradient(circle at 28% 14%, rgba(38, 224, 214, .18), rgba(3, 11, 26, .86) 72%);
}

.page-about .about-eco__hub::after{
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 26px;
  height: 26px;
  background: linear-gradient(225deg, var(--vh-orange) 0 50%, transparent 50%);
}

.page-about .about-eco__hub-num{
  font-family: var(--vh-font-mono);
  font-size: clamp(2.6rem, 7vw, 4rem);
  font-weight: 700;
  line-height: 1;
  color: var(--vh-orange);
}

.page-about .about-eco__hub-label{
  font-size: .95rem;
  font-weight: 600;
  color: var(--vh-mist);
}

.page-about .about-eco__hub-note{
  font-size: .8rem;
  color: var(--vh-steel);
}

.page-about .about-eco__branches{
  list-style: none;
  margin: 0;
  padding: 0 0 0 1.4rem;
  border-left: 1px solid var(--vh-line-strong);
  display: grid;
  gap: 1rem;
}

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

.page-about .about-branch::before{
  content: "";
  position: absolute;
  left: -1.4rem;
  top: .85rem;
  width: 1rem;
  height: 1px;
  background: var(--vh-line-strong);
}

.page-about .about-branch h3{
  margin: 0 0 .25rem;
  font-size: 1rem;
  font-weight: 700;
  color: var(--vh-mist);
}

.page-about .about-branch p{
  margin: 0;
  font-size: .88rem;
  color: var(--about-soft-text);
}

/* ---------- 更新节奏 ---------- */
.page-about .about-road{
  padding-block: var(--about-pad-lg);
  border-top: 1px solid var(--vh-line);
}

.page-about .about-road__head{
  max-width: 44rem;
}

.page-about .about-road__grid{
  display: grid;
  gap: 1rem;
  margin-top: clamp(1.5rem, 3vw, 2rem);
}

@media (min-width: 800px){
  .page-about .about-road__grid{ grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

.page-about .about-road__card{
  padding: clamp(1.05rem, 2.4vw, 1.5rem);
  border: 1px solid var(--vh-line);
  background: linear-gradient(160deg, rgba(58, 30, 110, .38), rgba(3, 11, 26, .74));
}

.page-about .about-road__tag{
  display: inline-block;
  margin-bottom: .75rem;
  padding: .16rem .5rem;
  border: 1px solid var(--vh-line-strong);
  font-family: var(--vh-font-mono);
  font-size: .71rem;
  letter-spacing: .12em;
  color: var(--vh-cyan);
}

.page-about .about-road__card h3{
  margin: 0 0 .45rem;
  font-size: 1.04rem;
  font-weight: 700;
}

.page-about .about-road__card p{
  margin: 0;
  font-size: .89rem;
  color: var(--about-soft-text);
}

.page-about .about-road__card a{
  color: var(--vh-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(38, 224, 214, .35);
}

.page-about .about-road__card a:hover,
.page-about .about-road__card a:focus-visible{
  border-bottom-color: var(--vh-cyan);
}

/* ---------- 咨询入口 ---------- */
.page-about .about-cta{
  padding-block: clamp(2rem, 5vw, 4rem) clamp(2.5rem, 6vw, 5rem);
  border-top: 1px solid var(--vh-line);
}

.page-about .about-cta__box{
  display: grid;
  gap: 1.4rem;
  padding: clamp(1.4rem, 4vw, 2.6rem);
  border: 1px solid var(--vh-line-strong);
  background:
    radial-gradient(circle at 88% 8%, rgba(255, 138, 61, .2), transparent 56%),
    linear-gradient(135deg, rgba(38, 224, 214, .1), rgba(58, 30, 110, .38));
}

@media (min-width: 820px){
  .page-about .about-cta__box{
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 2rem;
  }
}

.page-about .about-cta__title{
  margin: 0 0 .6rem;
  font-family: var(--vh-font-display);
  font-size: clamp(1.35rem, 3vw, 2rem);
  font-weight: 800;
  line-height: 1.2;
}

.page-about .about-cta__text{
  margin: 0;
  max-width: 56ch;
  font-size: .92rem;
  color: var(--about-soft-text);
}

.page-about .about-cta__actions{
  display: flex;
  flex-wrap: wrap;
  gap: .7rem;
}
<<<END>>>