.page-about{
  --page-gold-glow: rgba(212,168,67,.18);
  --page-line-grid: linear-gradient(rgba(212,168,67,.07) 1px,transparent 1px),
                     linear-gradient(90deg,rgba(212,168,67,.07) 1px,transparent 1px);
  background: var(--x-warm);
}

/* 面包屑 */
.page-about .page-about-breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:var(--x-space-2);
  padding-top:calc(var(--x-header-h) + var(--x-space-5));
  font-size:.875rem;
  color:rgba(255,255,255,.64);
}
.page-about .page-about-breadcrumb a{
  color:var(--x-gold);
  text-decoration:none;
  transition:color var(--x-transition);
}
.page-about .page-about-breadcrumb a:hover{
  color:var(--x-electric);
}
.page-about .page-breadcrumb-sep{
  color:rgba(255,255,255,.35);
}

/* 首屏 Hero */
.page-about .page-about-hero{
  position:relative;
  overflow:hidden;
  color:var(--x-white);
  background:
    radial-gradient(ellipse at 85% 20%,rgba(27,231,255,.15),transparent 45%),
    radial-gradient(ellipse at 10% 90%,rgba(212,168,67,.12),transparent 48%),
    var(--x-blue);
}
.page-about .page-about-hero::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:var(--page-line-grid);
  background-size:56px 56px;
  pointer-events:none;
}
.page-about .page-about-hero::after{
  content:"";
  position:absolute;
  top:0;
  right:-14%;
  width:55%;
  height:100%;
  background:linear-gradient(135deg,rgba(13,59,79,.95),rgba(10,27,42,.15) 82%);
  transform:skewX(-14deg);
  pointer-events:none;
}
.page-about .page-about-hero .x-container{
  position:relative;
  z-index:2;
}
.page-about .page-hero-watermark{
  position:absolute;
  right:-1rem;
  top:32%;
  z-index:1;
  font-family:var(--x-font-mono);
  font-size:4.5rem;
  font-weight:900;
  letter-spacing:.08em;
  line-height:1;
  color:rgba(212,168,67,.08);
  transform:rotate(-8deg);
  pointer-events:none;
  white-space:nowrap;
}
.page-about .page-about-hero-inner{
  display:grid;
  grid-template-columns:1fr;
  gap:var(--x-space-6);
  padding:var(--x-space-5) 0 var(--x-space-8);
}
.page-about .page-about-hero-copy .x-tag{
  margin-bottom:var(--x-space-4);
}
.page-about .page-about-hero-copy h1{
  color:var(--x-white);
  margin:0 0 var(--x-space-4);
}
.page-about .page-about-hero-lead{
  font-size:1.0625rem;
  line-height:1.75;
  color:rgba(255,255,255,.82);
  max-width:36rem;
  margin:0;
}
.page-about .page-about-hero-meta{
  display:flex;
  flex-wrap:wrap;
  gap:var(--x-space-5);
  margin-top:var(--x-space-5);
  padding-top:var(--x-space-4);
  border-top:1px solid rgba(212,168,67,.35);
}
.page-about .page-about-hero-meta > span{
  display:inline-flex;
  align-items:baseline;
  gap:.375rem;
  font-size:.875rem;
  color:rgba(255,255,255,.72);
}
.page-about .page-about-hero-meta .x-stat{
  font-size:1.625rem;
  line-height:1;
}
.page-about .page-about-hero-panel{
  position:relative;
  background:var(--x-teal);
  border:1px solid rgba(212,168,67,.4);
  padding:var(--x-space-5);
  transform:skewX(-4deg);
  box-shadow:var(--x-shadow-lg);
}
.page-about .page-about-hero-panel::after{
  content:"";
  position:absolute;
  top:-1px;
  right:-1px;
  width:56px;
  height:4px;
  background:var(--x-red);
}
.page-about .page-about-hero-panel > *{
  transform:skewX(4deg);
}
.page-about .page-hero-panel-label{
  display:inline-block;
  font-size:.75rem;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--x-electric);
  border-bottom:1px solid rgba(27,231,255,.4);
  padding-bottom:var(--x-space-2);
  margin-bottom:var(--x-space-4);
}
.page-about .page-hero-panel-list{
  list-style:none;
  margin:0 0 var(--x-space-5);
  padding:0;
  display:grid;
  gap:var(--x-space-3);
}
.page-about .page-hero-panel-list li{
  font-size:.9375rem;
  line-height:1.6;
  color:rgba(255,255,255,.88);
  padding-left:var(--x-space-3);
  border-left:2px solid var(--x-red);
}
.page-about .page-hero-panel-list b{
  color:var(--x-gold);
  font-family:var(--x-font-mono);
}
.page-about .page-about-hero-panel .x-btn{
  margin-top:var(--x-space-2);
}
.page-about .page-hero-panel-tip{
  margin:var(--x-space-4) 0 0;
  padding-top:var(--x-space-3);
  border-top:1px solid rgba(255,255,255,.12);
  font-size:.8125rem;
  color:rgba(255,255,255,.5);
}

/* 品牌叙事 */
.page-about .page-about-narrative{
  background:var(--x-warm);
}
.page-about .page-about-narrative-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:var(--x-space-6);
}
.page-about .page-about-narrative-copy h2{
  margin:var(--x-space-3) 0 var(--x-space-4);
}
.page-about .page-about-narrative-copy .x-body-copy + .x-body-copy{
  margin-top:var(--x-space-3);
}
.page-about .page-about-narrative-visual{
  position:relative;
  padding:var(--x-space-3);
  background:var(--x-blue);
  transform:skewX(-2deg);
}
.page-about .page-narrative-img{
  width:100%;
  max-width:100%;
  height:auto;
  display:block;
  object-fit:cover;
}

/* 发展里程碑 */
.page-about .page-about-milestones{
  background:linear-gradient(135deg,var(--x-blue-deep),var(--x-teal) 62%,var(--x-blue));
  color:var(--x-white);
}
.page-about .page-about-milestones .x-section-head h2{
  color:var(--x-white);
}
.page-about .page-about-timeline{
  position:relative;
  display:grid;
  gap:var(--x-space-5);
  padding-left:2.25rem;
  margin-top:var(--x-space-6);
}
.page-about .page-timeline-svg{
  position:absolute;
  top:0;
  bottom:0;
  left:12px;
  width:2px;
  height:100%;
  overflow:visible;
}
.page-about .page-timeline-item{
  position:static;
  display:grid;
  gap:var(--x-space-3);
}
.page-about .page-timeline-dot{
  position:absolute;
  left:7px;
  top:6px;
  width:12px;
  height:12px;
  border-radius:50%;
  background:var(--x-red);
  border:2px solid var(--x-gold);
  box-shadow:0 0 0 4px rgba(230,57,70,.22);
  transition:transform var(--x-transition),box-shadow var(--x-transition);
}
.page-about .page-timeline-item:hover .page-timeline-dot{
  transform:scale(1.35);
  box-shadow:0 0 0 7px rgba(230,57,70,.28);
}
.page-about .page-timeline-card{
  background:rgba(255,255,255,.05);
  border:1px solid rgba(255,255,255,.1);
  padding:var(--x-space-4);
  transition:border-color var(--x-transition),background var(--x-transition),transform var(--x-transition);
}
.page-about .page-timeline-card:hover{
  border-color:var(--x-gold);
  background:rgba(212,168,67,.08);
  transform:translateY(-3px);
}
.page-about .page-timeline-year{
  font-family:var(--x-font-mono);
  font-size:1.25rem;
  font-weight:700;
  color:var(--x-electric);
}
.page-about .page-timeline-card h3{
  font-size:1.0625rem;
  color:var(--x-white);
  margin:var(--x-space-2) 0;
}
.page-about .page-timeline-card p{
  font-size:.875rem;
  line-height:1.65;
  color:rgba(255,255,255,.72);
  margin:0;
}

/* 近三年主页改版回顾 */
.page-about .page-about-redesign{
  background:var(--x-warm);
}
.page-about .page-about-redesign-head{
  display:grid;
  gap:var(--x-space-4);
  margin-bottom:var(--x-space-6);
}
.page-about .page-about-redesign-intro{
  font-size:1rem;
  line-height:1.7;
  color:var(--x-ink);
  max-width:42rem;
  margin:0;
}
.page-about .page-about-year-group{
  display:grid;
  gap:var(--x-space-4);
  padding-top:var(--x-space-4);
  margin-bottom:var(--x-space-6);
  border-top:1px solid rgba(10,27,42,.12);
}
.page-about .page-about-year-tag{
  display:flex;
  align-items:flex-start;
}
.page-about .page-redesign-card-group{
  display:grid;
  grid-template-columns:1fr;
  gap:var(--x-space-4);
}
.page-about .page-redesign-card{
  position:relative;
  overflow:hidden;
  padding:var(--x-space-5);
  transition:transform var(--x-transition),box-shadow var(--x-transition);
}
.page-about .page-redesign-card::before{
  content:"";
  position:absolute;
  top:0;
  left:0;
  width:4px;
  height:100%;
  background:var(--x-gold);
  transform:scaleY(0);
  transform-origin:bottom;
  transition:transform var(--x-transition);
}
.page-about .page-redesign-card:hover{
  transform:translateY(-4px);
  box-shadow:var(--x-shadow);
}
.page-about .page-redesign-card:hover::before{
  transform:scaleY(1);
}
.page-about .page-version-index{
  display:block;
  font-family:var(--x-font-mono);
  font-size:2rem;
  font-weight:800;
  line-height:1;
  color:var(--x-gold);
  margin-bottom:var(--x-space-3);
  transition:color var(--x-transition);
}
.page-about .page-redesign-card:hover .page-version-index{
  color:var(--x-red);
}
.page-about .page-redesign-card h3{
  color:var(--x-white);
  font-size:1.0625rem;
  margin:0 0 var(--x-space-2);
}
.page-about .page-redesign-card p{
  color:rgba(255,255,255,.68);
  font-size:.875rem;
  line-height:1.65;
  margin:0;
}
.page-about .page-redesign-banner-img{
  display:block;
  width:100%;
  max-width:100%;
  height:auto;
  object-fit:cover;
  margin-top:var(--x-space-4);
  border:1px solid rgba(10,27,42,.15);
}

/* 苹果端服务发展 */
.page-about .page-about-apple{
  background:linear-gradient(160deg,var(--x-blue),var(--x-teal));
  color:var(--x-white);
}
.page-about .page-about-apple-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:var(--x-space-6);
}
.page-about .page-about-apple-copy h2{
  color:var(--x-white);
  margin:var(--x-space-3) 0 var(--x-space-4);
}
.page-about .page-about-apple-copy .x-body-copy{
  color:rgba(255,255,255,.78);
}
.page-about .page-about-apple-list{
  list-style:none;
  margin:var(--x-space-4) 0 0;
  padding:0;
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:var(--x-space-3);
}
.page-about .page-about-apple-list li{
  position:relative;
  padding-left:var(--x-space-4);
  font-size:.9375rem;
  line-height:1.5;
  color:rgba(255,255,255,.9);
}
.page-about .page-about-apple-list li::before{
  content:"";
  position:absolute;
  left:0;
  top:.45em;
  width:.5em;
  height:.5em;
  background:var(--x-electric);
  transform:rotate(45deg);
}
.page-about .page-about-apple-steps{
  margin-top:var(--x-space-5);
}
.page-about .page-about-apple .x-step-title{
  color:var(--x-gold);
}
.page-about .page-about-apple .x-step-desc{
  color:rgba(255,255,255,.75);
}
.page-about .page-about-apple-note{
  align-self:end;
}

/* 团队与能力 */
.page-about .page-about-team{
  background:var(--x-warm);
}
.page-about .page-about-team-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:var(--x-space-6);
}
.page-about .page-about-team-copy .x-body-copy + .x-body-copy{
  margin-top:var(--x-space-3);
}
.page-about .page-about-team-stats{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:var(--x-space-4);
  margin-top:var(--x-space-5);
  padding-top:var(--x-space-4);
  border-top:1px solid rgba(10,27,42,.12);
}
.page-about .page-about-team-stat{
  display:grid;
  gap:.125rem;
}
.page-about .page-about-team-stat .x-stat{
  font-size:2rem;
  line-height:1.1;
}
.page-about .page-about-team-note{
  margin-top:var(--x-space-4);
  font-size:.9375rem;
  color:rgba(10,27,42,.7);
}
.page-about .page-about-team-visual{
  position:relative;
  padding:var(--x-space-3);
  background:linear-gradient(135deg,var(--x-blue),var(--x-teal));
  transform:skewX(-2deg);
}
.page-about .page-team-img{
  width:100%;
  max-width:100%;
  height:auto;
  display:block;
  object-fit:cover;
}

/* 相关页面导航 */
.page-about .page-about-context-nav{
  background:var(--x-blue);
  padding:var(--x-space-7) 0;
}
.page-about .page-context-nav-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:var(--x-space-3);
}
.page-about .page-context-link{
  display:flex;
  align-items:center;
  gap:var(--x-space-2);
  text-decoration:none;
  color:var(--x-ink);
  font-weight:600;
  transition:border-color var(--x-transition),transform var(--x-transition),color var(--x-transition);
}
.page-about .page-context-link:hover{
  border-color:var(--x-gold);
  color:var(--x-red);
  transform:translateY(-3px);
}

@media (min-width: 64rem){
  .page-about .page-hero-watermark{
    font-size:9rem;
    right:2rem;
  }
  .page-about .page-about-hero-inner{
    grid-template-columns:1fr 24rem;
    gap:var(--x-space-7);
    padding-bottom:var(--x-space-8);
  }
  .page-about .page-about-hero-lead{
    font-size:1.1875rem;
  }
  .page-about .page-about-narrative-grid{
    grid-template-columns:1fr .9fr;
    gap:var(--x-space-7);
  }
  .page-about .page-about-redesign-head{
    grid-template-columns:1fr 1fr;
    align-items:end;
  }
  .page-about .page-about-year-group{
    grid-template-columns:120px 1fr;
    gap:var(--x-space-5);
  }
  .page-about .page-redesign-card-group{
    grid-template-columns:repeat(auto-fit,minmax(240px,1fr));
  }
  .page-about .page-about-apple-grid{
    grid-template-columns:1fr 320px;
    gap:var(--x-space-7);
  }
  .page-about .page-about-team-grid{
    grid-template-columns:1fr .85fr;
    gap:var(--x-space-7);
  }
  .page-about .page-about-team-stats{
    grid-template-columns:repeat(4,1fr);
  }
  .page-about .page-context-nav-grid{
    grid-template-columns:repeat(auto-fit,minmax(200px,1fr));
  }
}