.page-about{
  --about-rail-w: 204px;
  --about-gold-line: rgba(247,201,72,.72);
  background: var(--c-ink);
  color: var(--text);
  padding-bottom: clamp(48px, 8vw, 96px);
  overflow-x: clip;
}

/* ============ 首屏 ============ */
.page-about .about-hero{
  position: relative;
  overflow: hidden;
  padding: clamp(20px, 4vw, 40px) 0 clamp(44px, 6vw, 84px);
  background:
    radial-gradient(120% 100% at 88% -10%, rgba(255,90,31,.22), transparent 58%),
    radial-gradient(95% 80% at -5% 15%, rgba(45,226,230,.16), transparent 55%),
    linear-gradient(180deg, var(--c-ink) 0%, var(--c-ink-2) 100%);
  border-bottom: 1px solid var(--line);
}

.page-about .about-hero__inner{
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(22px, 3.4vw, 36px);
}

.page-about .about-hero__crumb{
  margin-bottom: 0;
}

.page-about .about-hero__tag{
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--c-cyan);
  text-transform: uppercase;
}

.page-about .about-hero h1{
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 5.2vw, 60px);
  line-height: 1.14;
  letter-spacing: .01em;
  color: var(--c-paper);
  max-width: 17em;
}

.page-about .about-hero__lede{
  margin: clamp(16px, 2.4vw, 24px) 0 0;
  max-width: 46em;
  color: var(--text-dim);
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.8;
}

.page-about .about-hero__actions{
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 30px);
}

.page-about .about-hero__stats{
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(10px, 2vw, 20px);
  border-top: 1px solid var(--line);
  padding-top: clamp(18px, 2.6vw, 28px);
}

.page-about .about-hero__stat{
  padding-left: 12px;
  border-left: 1px solid var(--line-strong);
}

.page-about .about-hero__stat-num{
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(20px, 3vw, 32px);
  line-height: 1.1;
  color: var(--c-gold);
  letter-spacing: -.01em;
}

.page-about .about-hero__stat-label{
  display: block;
  margin-top: 6px;
  font-size: 12px;
  line-height: 1.5;
  color: var(--text-dim);
}

.page-about .about-hero__beam{
  position: absolute;
  left: -8%;
  right: -8%;
  bottom: 0;
  height: 5px;
  background: linear-gradient(90deg, transparent, var(--c-cyan) 22%, var(--c-orange) 68%, transparent);
  opacity: .72;
  transform: skewY(-1.4deg);
  transform-origin: left bottom;
}

/* ============ 骨架与章节索引 ============ */
.page-about .about-shell{
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 3vw, 32px);
  padding-top: clamp(28px, 4vw, 52px);
}

.page-about .about-rail{
  display: none;
}

.page-about .about-rail__head{
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--c-haze);
}

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

.page-about .about-rail__item{
  border-bottom: 1px solid var(--line);
}

.page-about .about-rail__link{
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 10px 0 10px 10px;
  border-left: 2px solid transparent;
  color: var(--text-dim);
  font-size: 13px;
  text-decoration: none;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .about-rail__num{
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--c-gold);
  letter-spacing: .06em;
}

.page-about .about-rail__link:hover,
.page-about .about-rail__link:focus-visible{
  color: var(--c-paper);
  border-left-color: var(--c-cyan);
  background: rgba(45,226,230,.06);
  outline: none;
}

.page-about .about-rail__link[aria-current="true"],
.page-about .about-rail__link[aria-current="location"]{
  color: var(--c-cyan);
  border-left-color: var(--c-cyan);
}

.page-about .about-rail__back{
  display: inline-flex;
  width: 100%;
  justify-content: center;
}

/* ============ 章节通用 ============ */
.page-about .about-flow{
  min-width: 0;
}

.page-about .about-chapter{
  padding: clamp(30px, 5vw, 64px) 0;
  border-top: 1px solid var(--line);
}

.page-about .about-chapter:first-child{
  border-top: 0;
  padding-top: 0;
}

.page-about .about-chapter__head{
  display: flex;
  align-items: flex-start;
  gap: clamp(12px, 2.4vw, 26px);
  margin-bottom: clamp(20px, 3vw, 36px);
}

.page-about .about-chapter__num{
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: clamp(40px, 8vw, 100px);
  line-height: .78;
  letter-spacing: -.03em;
  color: rgba(247,201,72,.15);
  -webkit-text-stroke: 1.4px var(--about-gold-line);
}

.page-about .about-chapter__title{
  min-width: 0;
  padding-top: 4px;
}

.page-about .about-chapter__kicker{
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--c-cyan);
  margin-bottom: 10px;
}

.page-about .about-chapter h2{
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(21px, 3.1vw, 34px);
  line-height: 1.3;
  color: var(--c-paper);
  letter-spacing: .01em;
}

.page-about .about-chapter__intro{
  margin: 0 0 clamp(20px, 3vw, 32px);
  max-width: 50em;
  color: var(--text-dim);
  font-size: 15px;
  line-height: 1.85;
}

/* ============ 图片容器 ============ */
.page-about .about-figure{
  margin: 0;
  padding: 8px;
  border: 1px solid var(--line-strong);
  background: linear-gradient(155deg, rgba(36,18,77,.9), rgba(18,10,36,.9));
}

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

.page-about .about-figure__cap{
  padding: 10px 2px 2px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--c-haze);
}

.page-about .about-figure--sliced img{
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 26px), 0 100%);
}

.page-about .about-figure--wide{
  margin-bottom: clamp(26px, 4vw, 44px);
}

/* ============ 01 品牌起点 ============ */
.page-about .about-origin{
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 3vw, 28px);
}

.page-about .about-origin__text p{
  margin: 0 0 14px;
  color: var(--text);
  font-size: 15px;
  line-height: 1.9;
}

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

/* ============ 02 五条服务线 ============ */
.page-about .about-lines{
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-line{
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 4px 14px;
  padding: 16px 14px 18px;
  border-top: 1px solid var(--line);
  border-left: 2px solid transparent;
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .about-line:last-child{
  border-bottom: 1px solid var(--line);
}

.page-about .about-line:hover,
.page-about .about-line:focus-within{
  border-left-color: var(--c-cyan);
  background: rgba(45,226,230,.05);
}

.page-about .about-line__num{
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 15px;
  color: var(--c-gold);
  padding-top: 2px;
}

.page-about .about-line__body h3{
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  color: var(--c-paper);
  letter-spacing: .02em;
}

.page-about .about-line__body p{
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--text-dim);
}

/* ============ 03 年表 ============ */
.page-about .about-timeline{
  list-style: none;
  margin: 0;
  padding: 0 0 8px;
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(190px, 1fr);
  gap: 0;
  overflow-x: auto;
  overscroll-behavior-x: contain;
}

.page-about .about-timeline__item{
  position: relative;
  padding: 52px 16px 6px 0;
}

.page-about .about-timeline__item::before{
  content: "";
  position: absolute;
  top: 24px;
  left: 0;
  right: 8px;
  height: 1px;
  background: linear-gradient(90deg, var(--line-strong), var(--line));
}

.page-about .about-timeline__item::after{
  content: "";
  position: absolute;
  top: 19px;
  left: 0;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--c-gold);
  box-shadow: 0 0 0 4px rgba(247,201,72,.14);
  transition: box-shadow var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .about-timeline__item:hover::after{
  box-shadow: 0 0 0 7px rgba(247,201,72,.2);
  transform: scale(1.1);
}

.page-about .about-timeline__year{
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(20px, 2.6vw, 26px);
  font-weight: 700;
  color: var(--c-cyan);
  letter-spacing: -.01em;
  margin-bottom: 8px;
}

.page-about .about-timeline__label{
  margin: 0 0 8px;
  font-size: 15px;
  font-weight: 700;
  color: var(--c-paper);
  line-height: 1.4;
}

.page-about .about-timeline__text{
  margin: 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--text-dim);
  padding-right: 12px;
}

/* ============ 04 团队 ============ */
.page-about .about-crew{
  list-style: none;
  margin: 0 0 clamp(24px, 3.6vw, 40px);
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-about .about-crew__item{
  padding: 18px 16px 20px;
  border: 1px solid var(--line);
  border-top: 2px solid var(--c-gold);
  background: linear-gradient(180deg, rgba(36,18,77,.72), rgba(18,10,36,.4));
}

.page-about .about-crew__num{
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--c-gold);
  margin-bottom: 10px;
}

.page-about .about-crew__item h3{
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 700;
  color: var(--c-paper);
  letter-spacing: .02em;
}

.page-about .about-crew__item p{
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-dim);
}

/* ============ 05 合作与保障 ============ */
.page-about .about-eco{
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(14px, 3vw, 40px);
  margin-bottom: clamp(26px, 4vw, 44px);
  justify-content: start;
}

.page-about .about-eco__node{
  width: 100%;
  max-width: 220px;
  aspect-ratio: 1;
  border-radius: 50%;
  border: 1px solid var(--line-strong);
  display: grid;
  place-content: center;
  gap: 8px;
  text-align: center;
  padding: 16px;
  background:
    radial-gradient(circle at 50% 24%, rgba(45,226,230,.18), transparent 66%),
    radial-gradient(circle at 74% 92%, rgba(255,90,31,.16), transparent 62%),
    rgba(36,18,77,.5);
}

.page-about .about-eco__num{
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: clamp(30px, 5vw, 46px);
  line-height: 1;
  color: var(--c-gold);
}

.page-about .about-eco__label{
  display: block;
  font-size: 12px;
  line-height: 1.5;
  color: var(--text-dim);
}

.page-about .about-quality h3{
  margin: 0 0 14px;
  font-size: 16px;
  font-weight: 700;
  color: var(--c-paper);
  letter-spacing: .03em;
}

.page-about .about-quality__list{
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-quality__list li{
  position: relative;
  padding: 14px 16px 14px 30px;
  border: 1px solid var(--line);
  border-left: 2px solid var(--c-cyan);
  background: rgba(36,18,77,.42);
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-dim);
}

.page-about .about-quality__list li::before{
  content: "";
  position: absolute;
  top: 22px;
  left: 13px;
  width: 6px;
  height: 6px;
  background: var(--c-mint);
  border-radius: 50%;
}

.page-about .about-quality__list strong{
  display: block;
  margin-bottom: 5px;
  color: var(--c-paper);
  font-weight: 700;
  font-size: 14.5px;
}

/* ============ 06 找到我们 ============ */
.page-about .about-doors{
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-about .about-door{
  display: grid;
  align-content: start;
  gap: 10px;
  padding: 20px 18px 22px;
  border: 1px solid var(--line-strong);
  background: linear-gradient(200deg, rgba(45,226,230,.08), rgba(18,10,36,.2) 55%);
}

.page-about .about-door__num{
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .18em;
  color: var(--c-orange);
}

.page-about .about-door h3{
  margin: 0;
  font-size: 17px;
  font-weight: 700;
  color: var(--c-paper);
  letter-spacing: .02em;
}

.page-about .about-door p{
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-dim);
  word-break: break-word;
}

.page-about .about-door__link{
  justify-self: start;
  margin-top: 4px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--c-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(45,226,230,.45);
  padding-bottom: 2px;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-door__link:hover,
.page-about .about-door__link:focus-visible{
  color: var(--c-gold);
  border-color: var(--c-gold);
  outline: none;
}

/* ============ 响应式 ============ */
@media (min-width: 640px){
  .page-about .about-crew{
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .about-doors{
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 860px){
  .page-about .about-origin{
    grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr);
    gap: clamp(24px, 4vw, 52px);
    align-items: start;
  }
  .page-about .about-crew{
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-doors{
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .about-hero__inner{
    grid-template-columns: minmax(0, 1.4fr) minmax(0, .85fr);
    align-items: end;
    gap: clamp(24px, 4vw, 60px);
  }
  .page-about .about-hero__crumb{
    grid-column: 1 / -1;
  }
  .page-about .about-hero__stats{
    grid-template-columns: 1fr;
    border-top: 0;
    padding-top: 0;
    gap: 16px;
    padding-left: clamp(0px, 2vw, 24px);
    border-left: 1px solid var(--line);
  }
  .page-about .about-hero__stat{
    padding-left: 0;
    border-left: 0;
  }
}

@media (min-width: 1024px){
  .page-about .about-shell{
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    gap: clamp(28px, 4vw, 64px);
    align-items: start;
  }
  .page-about .about-rail{
    display: block;
    position: sticky;
    top: 104px;
    align-self: start;
  }
}

@media (min-width: 1180px){
  .page-about .about-chapter__num{
    font-size: 108px;
  }
}

@media (prefers-reduced-motion: reduce){
  .page-about .about-line,
  .page-about .about-rail__link,
  .page-about .about-door__link,
  .page-about .about-timeline__item::after{
    transition: none;
  }
  .page-about .about-timeline__item:hover::after{
    transform: none;
  }
}
<<<END>>>