.page-about{
  --about-line-soft:rgba(17,24,32,0.1);
  --about-line-dark:rgba(141,155,174,0.28);
  --about-body:#3A4B60;
  background:var(--white);
  color:var(--charcoal);
}

.page-about p{ line-height:1.85; }

.page-about h2{
  margin:14px 0 0;
  font-family:var(--font-display);
  font-size:clamp(1.55rem,3.6vw,2.45rem);
  line-height:1.16;
  letter-spacing:-0.02em;
  color:var(--deep);
}

.page-about a:focus-visible,
.page-about button:focus-visible{
  outline:2px solid var(--cyan);
  outline-offset:3px;
  border-radius:6px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero{
  position:relative;
  overflow:hidden;
  padding:clamp(22px,4vw,38px) 0 clamp(42px,7vw,80px);
  background-color:var(--deep);
  background-image:
    linear-gradient(rgba(104,216,255,0.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(104,216,255,0.05) 1px,transparent 1px);
  background-size:64px 64px;
  color:var(--silver);
}

.page-about .about-hero::before{
  content:"";
  position:absolute;
  top:-20%;
  right:-18%;
  width:min(640px,82vw);
  height:min(640px,82vw);
  border-radius:50%;
  background:radial-gradient(circle at 34% 34%,rgba(104,216,255,0.22),rgba(10,26,47,0) 64%);
  pointer-events:none;
}

.page-about .about-hero::after{
  content:"";
  position:absolute;
  left:-10%;
  right:-10%;
  bottom:-150px;
  height:260px;
  background:var(--steel);
  opacity:0.3;
  transform:skewY(-4deg);
  pointer-events:none;
}

.page-about .about-hero .wrap{ position:relative; z-index:1; }

.page-about .about-crumbs{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:6px;
  font-family:var(--font-mono);
  font-size:0.72rem;
  letter-spacing:0.05em;
  color:var(--mist);
}
.page-about .about-crumbs a{ color:var(--silver); text-decoration:none; }
.page-about .about-crumbs a:hover{ color:var(--orange); }

.page-about .about-hero__grid{
  display:grid;
  gap:clamp(26px,4vw,44px);
  margin-top:clamp(24px,4vw,40px);
}

.page-about .about-hero__title{
  margin:14px 0 0;
  font-family:var(--font-display);
  font-size:clamp(2.1rem,6vw,4.3rem);
  font-weight:900;
  line-height:1.04;
  letter-spacing:-0.03em;
  color:var(--white);
}

.page-about .about-hero__lead{
  max-width:48ch;
  margin:18px 0 0;
  font-size:clamp(0.98rem,1.6vw,1.1rem);
  line-height:1.85;
  color:rgba(233,240,247,0.82);
}

.page-about .about-hero__actions{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-top:24px;
}

.page-about .about-plate{
  align-self:start;
  padding:clamp(18px,3vw,26px);
  border:1px solid rgba(104,216,255,0.28);
  border-radius:var(--radius-lg);
  background:linear-gradient(160deg,rgba(44,79,115,0.62),rgba(5,13,26,0.92));
  box-shadow:var(--shadow-sticker);
}

.page-about .about-plate__tag{
  margin:0;
  font-size:0.72rem;
  letter-spacing:0.06em;
  color:var(--cyan);
}

.page-about .about-plate__list{
  display:grid;
  gap:10px;
  margin:16px 0 0;
}

.page-about .about-plate__list > div{
  display:grid;
  grid-template-columns:auto minmax(0,1fr);
  gap:12px;
  align-items:baseline;
  padding-top:10px;
  border-top:1px dashed rgba(141,155,174,0.32);
}

.page-about .about-plate__list dt{
  font-family:var(--font-mono);
  font-size:0.7rem;
  letter-spacing:0.06em;
  color:var(--mist);
  white-space:nowrap;
}

.page-about .about-plate__list dd{
  margin:0;
  font-size:0.93rem;
  line-height:1.6;
  color:var(--silver);
}

.page-about .about-figures{
  display:grid;
  gap:1px;
  margin:clamp(30px,5vw,52px) 0 0;
  padding:0;
  list-style:none;
  background:rgba(141,155,174,0.24);
  border-top:1px solid var(--about-line-dark);
  border-bottom:1px solid var(--about-line-dark);
}

.page-about .about-figure{
  display:flex;
  flex-direction:column;
  gap:6px;
  padding:18px 14px 20px;
  background:var(--deep);
  transition:background var(--dur) var(--ease);
}

.page-about .about-figure:hover,
.page-about .about-figure:focus-within{ background:rgba(44,79,115,0.42); }

.page-about .about-figure__num{
  font-family:var(--font-mono);
  font-size:clamp(1.75rem,4.4vw,2.5rem);
  font-weight:700;
  line-height:1;
  color:var(--white);
}

.page-about .about-figure:first-child .about-figure__num{ color:var(--orange); }

.page-about .about-figure__num span{
  font-size:0.6em;
  color:var(--orange);
}

.page-about .about-figure__label{
  font-size:0.84rem;
  line-height:1.55;
  color:var(--mist);
}

.page-about .about-jump{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  margin-top:clamp(24px,4vw,36px);
}

.page-about .about-jump a{
  padding:7px 14px;
  border:1px solid rgba(141,155,174,0.4);
  border-radius:var(--radius-pill);
  font-family:var(--font-mono);
  font-size:0.73rem;
  letter-spacing:0.04em;
  color:var(--silver);
  text-decoration:none;
  transition:color var(--dur) var(--ease),background var(--dur) var(--ease),border-color var(--dur) var(--ease);
}

.page-about .about-jump a:hover{
  background:var(--silver);
  border-color:var(--silver);
  color:var(--deep);
}

/* ---------- 起点与客户 ---------- */
.page-about .about-origin{ background:var(--white); }

.page-about .about-origin__text{
  margin:16px 0 0;
  font-size:1rem;
  color:var(--about-body);
}

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

.page-about .about-sector{
  padding:14px 16px;
  border:1px solid var(--about-line-soft);
  border-left:3px solid var(--steel);
  border-radius:var(--radius-md);
  background:var(--white);
  transition:transform var(--dur) var(--ease),border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}

.page-about .about-sector:hover,
.page-about .about-sector:focus-within{
  transform:translateX(3px);
  border-left-color:var(--orange);
  box-shadow:0 16px 30px -26px rgba(5,13,26,0.85);
}

.page-about .about-sector h3{
  margin:0 0 5px;
  font-size:1rem;
  letter-spacing:-0.01em;
  color:var(--deep);
}

.page-about .about-sector p{
  margin:0;
  font-size:0.93rem;
  color:var(--about-body);
}

/* ---------- 发展历程 ---------- */
.page-about .about-timeline{ background:var(--silver); }

.page-about .about-timeline__head{
  max-width:62ch;
  margin-bottom:clamp(24px,4vw,40px);
}

.page-about .about-timeline-list{
  position:relative;
  margin:0;
  padding:0 0 0 34px;
  list-style:none;
}

.page-about .about-timeline-list::before{
  content:"";
  position:absolute;
  left:8px;
  top:8px;
  bottom:26px;
  width:2px;
  border-radius:2px;
  background:linear-gradient(180deg,var(--orange),var(--steel) 58%,rgba(44,79,115,0.16));
}

.page-about .about-milestone{
  position:relative;
  padding-bottom:20px;
}

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

.page-about .about-milestone::before{
  content:"";
  position:absolute;
  left:-31px;
  top:8px;
  width:12px;
  height:12px;
  border-radius:50%;
  background:var(--silver);
  border:2px solid var(--steel);
  transition:border-color var(--dur) var(--ease),transform var(--dur) var(--ease);
}

.page-about .about-milestone:hover::before,
.page-about .about-milestone:focus-within::before{
  border-color:var(--orange);
  transform:scale(1.25);
}

.page-about .about-milestone__year{
  display:inline-block;
  margin-bottom:6px;
  font-size:0.9rem;
  font-weight:700;
  letter-spacing:0.1em;
  color:var(--steel);
}

.page-about .about-milestone__card{
  padding:16px 18px;
  border:1px solid var(--about-line-soft);
  border-left:3px solid var(--steel);
  border-radius:var(--radius-md);
  background:var(--white);
  transition:transform var(--dur) var(--ease),border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}

.page-about .about-milestone:hover .about-milestone__card,
.page-about .about-milestone:focus-within .about-milestone__card{
  transform:translateY(-3px);
  border-left-color:var(--orange);
  box-shadow:0 18px 34px -26px rgba(5,13,26,0.85);
}

.page-about .about-milestone__card h3{
  margin:0 0 6px;
  font-size:1.02rem;
  letter-spacing:-0.01em;
  color:var(--deep);
}

.page-about .about-milestone__card p{
  margin:0;
  font-size:0.93rem;
  color:var(--about-body);
}

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

.page-about .about-timeline__figure img{
  display:block;
  width:100%;
  height:auto;
  border:1px solid var(--about-line-soft);
  border-radius:var(--radius-lg);
  background:var(--deep);
  object-fit:cover;
}

.page-about .about-timeline__figure figcaption{
  margin-top:10px;
  font-family:var(--font-mono);
  font-size:0.72rem;
  line-height:1.65;
  letter-spacing:0.03em;
  color:#5C6F85;
}

/* ---------- 服务网络 ---------- */
.page-about .about-network{
  background:var(--deep);
  color:var(--silver);
}

.page-about .about-network h2{ color:var(--white); }

.page-about .about-network__grid{
  display:grid;
  gap:clamp(24px,4vw,44px);
}

.page-about .about-network p{
  margin:16px 0 0;
  color:rgba(233,240,247,0.8);
}

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

.page-about .about-network__roles li{
  padding:7px 13px;
  border:1px solid rgba(104,216,255,0.34);
  border-radius:var(--radius-pill);
  font-family:var(--font-mono);
  font-size:0.72rem;
  letter-spacing:0.05em;
  color:var(--cyan);
}

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

.page-about .about-network__figure img{
  display:block;
  width:100%;
  height:auto;
  border:1px solid rgba(104,216,255,0.24);
  border-radius:var(--radius-lg);
  background:var(--ink);
  object-fit:cover;
}

.page-about .about-network__figure figcaption{
  margin-top:10px;
  font-family:var(--font-mono);
  font-size:0.72rem;
  line-height:1.65;
  color:var(--mist);
}

/* ---------- 版本说明 ---------- */
.page-about .about-version{ background:var(--white); }

.page-about .about-version__head{ max-width:66ch; }

.page-about .about-version__lead{
  margin:16px 0 0;
  font-size:1rem;
  color:var(--about-body);
}

.page-about .about-version__bands{
  margin-top:clamp(24px,4vw,40px);
  border-top:1px solid var(--about-line-soft);
}

.page-about .about-version__band{
  display:grid;
  gap:6px 18px;
  padding:20px 0;
  border-bottom:1px solid var(--about-line-soft);
  transition:background var(--dur) var(--ease),padding-left var(--dur) var(--ease);
}

.page-about .about-version__band:hover,
.page-about .about-version__band:focus-within{
  padding-left:14px;
  background:rgba(233,240,247,0.6);
}

.page-about .about-version__no{
  font-size:1.4rem;
  font-weight:700;
  color:var(--steel);
}

.page-about .about-version__band h3{
  margin:0;
  font-size:1.02rem;
  letter-spacing:-0.01em;
  color:var(--deep);
}

.page-about .about-version__band p{
  margin:0;
  font-size:0.95rem;
  color:var(--about-body);
}

/* ---------- 合作方式 ---------- */
.page-about .about-services{ background:var(--silver); }

.page-about .about-services__lead{
  margin:16px 0 22px;
  font-size:0.98rem;
  color:var(--about-body);
}

.page-about .about-services .accordion{
  display:grid;
  gap:10px;
}

.page-about .about-services .accordion__item{
  overflow:hidden;
  border:1px solid var(--about-line-soft);
  border-radius:var(--radius-md);
  background:var(--white);
  transition:border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}

.page-about .about-services .accordion__item:hover,
.page-about .about-services .accordion__item:focus-within{
  border-color:rgba(255,107,44,0.5);
  box-shadow:0 16px 30px -26px rgba(5,13,26,0.85);
}

.page-about .about-services .accordion__panel p{
  margin:0 0 10px;
  font-size:0.95rem;
  color:var(--about-body);
}

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

/* ---------- 资质与协作 ---------- */
.page-about .about-trust{
  background:var(--ink);
  color:var(--silver);
}

.page-about .about-trust h2{ color:var(--white); }

.page-about .about-trust p{
  margin:16px 0 0;
  color:rgba(233,240,247,0.78);
}

.page-about .about-trust__list{
  display:grid;
  gap:12px;
  margin:20px 0 0;
  padding:0;
  list-style:none;
}

.page-about .about-trust__list li{
  display:grid;
  grid-template-columns:auto minmax(0,1fr);
  gap:12px;
  align-items:start;
  font-size:0.95rem;
  line-height:1.75;
  color:rgba(233,240,247,0.8);
}

.page-about .about-trust__list li::before{
  content:"";
  width:8px;
  height:8px;
  margin-top:8px;
  border-radius:2px;
  background:var(--green);
  box-shadow:0 0 0 4px rgba(126,217,87,0.14);
}

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

.page-about .about-trust__figure img{
  display:block;
  width:100%;
  height:auto;
  border:1px solid rgba(141,155,174,0.3);
  border-radius:var(--radius-lg);
  background:var(--deep);
  object-fit:cover;
}

.page-about .about-trust__figure figcaption{
  margin-top:10px;
  font-family:var(--font-mono);
  font-size:0.72rem;
  line-height:1.65;
  color:var(--mist);
}

.page-about .about-pledge{
  display:grid;
  gap:1px;
  margin-top:clamp(28px,5vw,44px);
  overflow:hidden;
  border-radius:var(--radius-md);
  background:rgba(141,155,174,0.24);
}

.page-about .about-pledge > div{
  display:flex;
  flex-direction:column;
  gap:6px;
  padding:18px 16px;
  background:rgba(44,79,115,0.34);
}

.page-about .about-pledge__num{
  font-size:1.4rem;
  font-weight:700;
  letter-spacing:0.04em;
  color:var(--green);
}

.page-about .about-pledge__label{
  font-size:0.84rem;
  line-height:1.6;
  color:var(--mist);
}

/* ---------- 结尾 ---------- */
.page-about .about-cta{ background:var(--white); }

.page-about .about-cta__panel{
  position:relative;
  overflow:hidden;
  padding:clamp(26px,5vw,52px);
  border-radius:var(--radius-lg);
  background:linear-gradient(135deg,var(--deep),var(--steel));
  color:var(--white);
}

.page-about .about-cta__panel::after{
  content:"";
  position:absolute;
  top:-70px;
  right:-70px;
  width:230px;
  height:230px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(255,107,44,0.45),rgba(255,107,44,0) 68%);
  pointer-events:none;
}

.page-about .about-cta__panel > *{ position:relative; }

.page-about .about-cta__panel h2{
  margin-top:0;
  color:var(--white);
}

.page-about .about-cta__panel p{
  max-width:56ch;
  margin:14px 0 0;
  color:rgba(233,240,247,0.82);
}

.page-about .about-cta__actions{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-top:24px;
}

/* ---------- 响应式 ---------- */
@media (min-width:700px){
  .page-about .about-figures{ grid-template-columns:repeat(4,minmax(0,1fr)); }
  .page-about .about-pledge{ grid-template-columns:repeat(3,minmax(0,1fr)); }
  .page-about .about-sectors{ grid-template-columns:repeat(2,minmax(0,1fr)); }
}

@media (min-width:760px){
  .page-about .about-version__band{
    grid-template-columns:80px minmax(0,1fr) minmax(0,1.4fr);
    align-items:start;
  }
}

@media (min-width:880px){
  .page-about .about-hero__grid{
    grid-template-columns:minmax(0,1.6fr) minmax(0,1fr);
    align-items:start;
  }
  .page-about .about-plate{ transform:translateY(12px); }
}

@media (min-width:900px){
  .page-about .about-network__grid{
    grid-template-columns:minmax(0,1.1fr) minmax(0,1fr);
    align-items:center;
  }
}

@media (prefers-reduced-motion:reduce){
  .page-about *{
    transition-duration:1ms !important;
    animation-duration:1ms !important;
  }
  .page-about .about-sector:hover,
  .page-about .about-milestone:hover .about-milestone__card,
  .page-about .about-milestone:hover::before,
  .page-about .about-plate{
    transform:none;
  }
}