.page-about{
  --axis: rgba(51,214,208,.42);
  --earth-veil: rgba(110,74,44,.24);
  --warm-veil: rgba(255,106,31,.10);
  --cool-veil: rgba(51,214,208,.09);
  padding: 26px 0 78px;
  color: var(--ice);
  overflow-x: hidden;
}

.page-about .crumbs{
  margin-bottom: 30px;
}

.page-about .sec{
  margin-top: 76px;
}

.page-about h2{
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(26px, 4.2vw, 40px);
  line-height: 1.22;
  letter-spacing: .01em;
  margin: 0 0 18px;
  color: var(--cream);
}

.page-about h3{
  font-family: var(--font-geo);
  font-size: 17px;
  line-height: 1.4;
  margin: 0 0 10px;
  color: var(--ice);
  letter-spacing: .01em;
}

.page-about .sec__lede{
  max-width: 62ch;
  margin-bottom: 26px;
}

.page-about .prose a{
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(51,214,208,.42);
  transition: border-color .14s ease, color .14s ease;
}

.page-about .prose a:hover,
.page-about .prose a:focus-visible{
  color: var(--ember);
  border-bottom-color: var(--lava);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero{
  display: grid;
  gap: 30px;
  align-items: end;
}

.page-about .about-hero__media{
  position: relative;
  margin: 0;
}

.page-about .about-hero__media img{
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 34px), calc(100% - 34px) 100%, 0 100%);
  background: linear-gradient(150deg, rgba(255,106,31,.18), rgba(51,214,208,.08));
}

.page-about .about-hero__media::before{
  content: "";
  position: absolute;
  inset: -18px -18px auto auto;
  width: 46%;
  aspect-ratio: 1;
  background: radial-gradient(circle, rgba(255,106,31,.30), transparent 68%);
  pointer-events: none;
  z-index: 0;
}

.page-about .about-hero__media .media__cap{
  position: relative;
  z-index: 1;
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--ash);
}

.page-about .about-hero__lede .t-display{
  margin: 10px 0 18px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 5.4vw, 56px);
  line-height: 1.15;
  color: var(--cream);
  text-wrap: balance;
}

.page-about .about-hero__lede .prose{
  max-width: 60ch;
  color: var(--ash);
}

.page-about .about-hero__lede .prose + .prose{
  margin-top: 12px;
}

.page-about .about-hero__actions{
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 26px 0 0;
}

@media (min-width: 900px){
  .page-about .about-hero{
    grid-template-columns: minmax(0, .92fr) minmax(0, 1.08fr);
    gap: 52px;
  }
  .page-about .about-hero__media{
    align-self: start;
  }
}

/* ---------- 源点 ---------- */
.page-about .origin-cols{
  display: grid;
  gap: 16px;
  max-width: 74ch;
}

.page-about .origin-cols .prose{
  margin: 0;
  color: var(--ash);
}

.page-about .symbol-list{
  list-style: none;
  margin: 32px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .symbol-list__item{
  position: relative;
  padding: 20px 18px 18px 62px;
  background: linear-gradient(120deg, var(--warm-veil), rgba(22,25,31,.9) 52%);
  border-left: 2px solid var(--line-warm);
}

.page-about .symbol-list__item p{
  margin: 0;
  color: var(--ash);
  font-size: 15px;
  line-height: 1.7;
}

.page-about .symbol-list__no{
  position: absolute;
  left: 18px;
  top: 21px;
  font-size: 22px;
  line-height: 1;
  color: var(--lava);
  text-shadow: 0 0 14px rgba(255,106,31,.55);
}

@media (min-width: 820px){
  .page-about .origin-cols{
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 26px;
    max-width: none;
  }
  .page-about .symbol-list{
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }
  .page-about .symbol-list__item{
    padding: 22px 20px 20px;
    border-left: 0;
    border-top: 2px solid var(--line-warm);
  }
  .page-about .symbol-list__no{
    position: static;
    display: block;
    margin-bottom: 10px;
  }
}

/* ---------- 时间轴 ---------- */
.page-about .timeline-figure{
  margin: 0 0 34px;
}

.page-about .timeline-figure img{
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border: 1px solid var(--line);
  background: var(--slate);
}

.page-about .timeline-figure .media__cap{
  display: block;
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--ash);
}

.page-about .timeline{
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column-reverse;
}

.page-about .ver{
  display: grid;
  grid-template-columns: 22px minmax(0, 1fr);
  grid-template-areas:
    "axis year"
    "axis body";
  column-gap: 14px;
  padding-bottom: 30px;
}

.page-about .ver:first-child{
  padding-bottom: 0;
}

.page-about .ver__axis{
  grid-area: axis;
  position: relative;
  display: block;
}

.page-about .ver__axis::before{
  content: "";
  position: absolute;
  left: 50%;
  top: 4px;
  bottom: 0;
  width: 0;
  transform: translateX(-50%);
  border-left: 1px dashed var(--axis);
}

.page-about .ver:first-child .ver__axis::before{
  bottom: 60%;
  opacity: .5;
}

.page-about .ver__axis::after{
  content: "";
  position: absolute;
  left: 50%;
  top: 6px;
  width: 11px;
  height: 11px;
  margin-left: -5.5px;
  border-radius: 50%;
  background: var(--lava);
  box-shadow: 0 0 0 4px rgba(255,106,31,.16), 0 0 16px 3px rgba(255,106,31,.45);
}

.page-about .ver__year{
  grid-area: year;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--cyan);
  margin-bottom: 10px;
}

.page-about .ver__body{
  grid-area: body;
  min-width: 0;
  max-width: 100%;
}

.page-about .ver__card{
  padding: 20px 18px;
  transition: transform .18s ease, box-shadow .18s ease;
}

.page-about .ver__card:hover,
.page-about .ver__card:focus-within{
  transform: translateY(-2px);
  box-shadow: 0 0 0 1px rgba(255,106,31,.42), 0 14px 34px -20px rgba(255,106,31,.75);
}

.page-about .ver__card--now{
  background: linear-gradient(150deg, rgba(255,106,31,.16), rgba(22,25,31,.94) 58%);
}

.page-about .ver__tag{
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--ember);
}

.page-about .ver__card p{
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--ash);
}

.page-about .ver__link{
  margin-top: 12px !important;
}

.page-about .ver__link a{
  color: var(--cyan);
  font-size: 14px;
  text-decoration: none;
  border-bottom: 1px solid rgba(51,214,208,.4);
  transition: color .14s ease, border-color .14s ease;
}

.page-about .ver__link a:hover,
.page-about .ver__link a:focus-visible{
  color: var(--lava);
  border-bottom-color: var(--lava);
}

@media (min-width: 760px){
  .page-about .ver{
    grid-template-columns: 88px 24px minmax(0, 1fr);
    grid-template-areas: "year axis body";
    column-gap: 18px;
  }
  .page-about .ver__year{
    font-size: 15px;
    margin-bottom: 0;
    padding-top: 22px;
    text-align: right;
  }
  .page-about .ver__card{
    padding: 24px 26px;
  }
  .page-about .ver:nth-child(1) .ver__body{ max-width: 68%; }
  .page-about .ver:nth-child(2) .ver__body{ max-width: 80%; }
  .page-about .ver:nth-child(3) .ver__body{ max-width: 92%; }
  .page-about .ver:nth-child(4) .ver__body{ max-width: 100%; }
}

/* ---------- 规模数据带 ---------- */
.page-about .scale-band{
  list-style: none;
  margin: 0 0 30px;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .scale-band__item{
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 22px 16px;
  background: linear-gradient(180deg, rgba(22,25,31,.96), rgba(11,13,16,.99));
}

.page-about .scale-band__num{
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(34px, 6vw, 54px);
  line-height: .98;
  color: var(--lava);
  letter-spacing: -.01em;
}

.page-about .scale-band__item:nth-child(2) .scale-band__num{
  color: var(--ember);
}

.page-about .scale-band__item:nth-child(3) .scale-band__num{
  color: var(--cream);
}

.page-about .scale-band__item:nth-child(4) .scale-band__num{
  color: var(--cyan);
}

.page-about .scale-band__label{
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--ash);
}

.page-about .sec--scale .prose{
  max-width: 66ch;
  color: var(--ash);
}

.page-about .dim-list{
  list-style: none;
  margin: 20px 0 22px;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

@media (min-width: 760px){
  .page-about .scale-band{
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .scale-band__item{
    padding: 28px 22px;
  }
}

/* ---------- 团队 ---------- */
.page-about .crew{
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.page-about .crew__item{
  position: relative;
  padding: 22px 16px 20px;
  background: linear-gradient(155deg, var(--warm-veil), rgba(22,25,31,.94) 48%);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 16px), calc(100% - 16px) 100%, 0 100%);
  transition: background .2s ease;
}

.page-about .crew__item:nth-child(even){
  clip-path: polygon(0 0, 100% 0, 100% 100%, 16px 100%, 0 calc(100% - 16px));
  background: linear-gradient(205deg, var(--cool-veil), rgba(22,25,31,.94) 48%);
}

.page-about .crew__item::before{
  content: "";
  position: absolute;
  left: 16px;
  right: 16px;
  top: 0;
  height: 2px;
  background: var(--lava);
  opacity: .8;
}

.page-about .crew__item:nth-child(even)::before{
  background: var(--cyan);
  opacity: .6;
}

.page-about .crew__item:hover,
.page-about .crew__item:focus-within{
  background: linear-gradient(155deg, rgba(255,106,31,.24), rgba(22,25,31,.94) 56%);
}

.page-about .crew__no{
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--ember);
}

.page-about .crew__item p{
  margin: 0;
  font-size: 14px;
  line-height: 1.68;
  color: var(--ash);
}

.page-about .sec--crew > .prose{
  max-width: 66ch;
  margin-top: 26px;
  color: var(--ash);
}

@media (min-width: 880px){
  .page-about .crew{
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 14px;
  }
  .page-about .crew__item{
    padding: 26px 20px 24px;
  }
}

/* ---------- 山西 ---------- */
.page-about .shanxi{
  position: relative;
  display: grid;
  gap: 26px;
  padding: 30px 20px;
  background:
    radial-gradient(130% 150% at 100% 0%, var(--warm-veil), transparent 58%),
    var(--earth-veil);
  border-top: 1px solid var(--line-warm);
  border-bottom: 1px solid var(--line);
}

.page-about .shanxi__text .prose{
  margin: 0 0 14px;
  color: var(--ice);
  opacity: .86;
}

.page-about .shanxi__media{
  margin: 0;
}

.page-about .shanxi__media img{
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border-left: 2px solid var(--lava);
  background: var(--slate);
}

.page-about .shanxi__media .media__cap{
  display: block;
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--ember);
}

.page-about .node-row{
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
}

.page-about .node-row__item{
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--cream);
}

.page-about .node-row__dot{
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--signal);
  box-shadow: 0 0 10px 2px rgba(226,38,59,.6);
}

@media (min-width: 860px){
  .page-about .shanxi{
    grid-template-columns: minmax(0, 1.12fr) minmax(0, .88fr);
    gap: 40px;
    padding: 44px 36px;
    align-items: center;
  }
}

/* ---------- 合作 ---------- */
.page-about .partner-cols{
  display: grid;
  gap: 16px;
  margin-bottom: 28px;
}

.page-about .partner-cols .prose{
  margin: 0;
  color: var(--ash);
}

.page-about .partner-grid{
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .partner-grid__item{
  padding: 22px 18px;
  background: rgba(22,25,31,.9);
  transition: background .18s ease;
}

.page-about .partner-grid__item:hover{
  background: rgba(255,106,31,.10);
}

.page-about .partner-grid__item p{
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ash);
}

@media (min-width: 820px){
  .page-about .partner-cols{
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 26px;
  }
  .page-about .partner-grid{
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .partner-grid__item{
    padding: 26px 22px;
  }
}

/* ---------- 下一步 ---------- */
.page-about .next-grid{
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .next-grid__item a{
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 20px 18px;
  text-decoration: none;
  color: var(--ash);
  font-size: 14px;
  line-height: 1.65;
  background: rgba(22,25,31,.86);
  border: 1px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%);
  transition: border-color .18s ease, background .18s ease, transform .18s ease;
}

.page-about .next-grid__item a:hover,
.page-about .next-grid__item a:focus-visible{
  border-color: var(--lava);
  background: rgba(255,106,31,.12);
  transform: translateY(-2px);
}

.page-about .next-grid__no{
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--cyan);
}

.page-about .next-grid__item strong{
  font-family: var(--font-geo);
  font-size: 16px;
  color: var(--ice);
  letter-spacing: .01em;
}

@media (min-width: 780px){
  .page-about .next-grid{
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 14px;
  }
}

@media (prefers-reduced-motion: reduce){
  .page-about *{
    transition: none !important;
    animation: none !important;
  }
}