.page-about{
  position:relative;
  color:var(--text-paper);
  background:
    radial-gradient(circle at 85% 12%, rgba(0,212,255,.06), transparent 320px),
    var(--bg-ink);
}

.page-about .page-shell{
  max-width:1440px;
  margin:0 auto;
  padding:24px 16px 96px;
}

/* 面包屑 */
.page-about .breadcrumb{
  display:flex;
  align-items:center;
  gap:10px;
  font-size:13px;
  font-weight:600;
  letter-spacing:.04em;
  color:var(--text-dim);
  margin:0 0 32px;
  padding:10px 0;
  border-bottom:1px solid var(--line-panel);
  text-transform:uppercase;
}

.page-about .breadcrumb-sep{
  color:var(--accent-blue);
}

.page-about .breadcrumb-current{
  color:var(--text-paper);
}

/* 页面标题区 */
.page-about .about-hero{
  position:relative;
  display:grid;
  grid-template-columns:1fr;
  gap:28px;
  padding:8px 0 44px;
  margin-bottom:64px;
  border-bottom:1px solid var(--line-blue);
}

.page-about .about-hero-copy{
  max-width:920px;
}

.page-about .main-heading{
  margin:0 0 18px;
  font-family:var(--font-head);
  font-weight:900;
  font-size:clamp(28px,5.2vw,50px);
  line-height:1.15;
  letter-spacing:-.01em;
  transform:skewX(-2deg);
  text-wrap:balance;
}

.page-about .heading-accent{
  display:inline-block;
  color:var(--accent-blue);
  position:relative;
  padding:0 2px;
}

.page-about .heading-accent::after{
  content:"";
  position:absolute;
  left:0;
  bottom:.08em;
  width:100%;
  height:.16em;
  background:linear-gradient(90deg,var(--accent-blue),rgba(0,212,255,.08));
  z-index:-1;
}

.page-about .page-intro{
  max-width:760px;
  font-size:clamp(15px,1.8vw,18px);
  line-height:1.75;
  color:var(--text-dim);
  margin:0;
}

.page-about .page-intro b{
  color:var(--text-paper);
}

/* 标题区数据 */
.page-about .about-hero-stats{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:1px;
  background:var(--line-panel);
  border:1px solid var(--line-panel);
  border-radius:2px;
  overflow:hidden;
}

.page-about .hero-stat{
  background:var(--bg-panel);
  padding:20px 16px;
  display:flex;
  flex-direction:column;
  gap:6px;
  transition:background .2s;
}

.page-about .hero-stat:hover{
  background:var(--bg-panel-2);
}

.page-about .hero-stat-flash{
  background:linear-gradient(135deg,var(--bg-panel) 60%,rgba(0,212,255,.1));
}

.page-about .hero-stat-num{
  font-family:var(--font-mono);
  font-size:clamp(24px,3.4vw,38px);
  font-weight:800;
  color:var(--accent-blue);
  letter-spacing:-.03em;
  line-height:1;
}

.page-about .hero-stat:nth-child(2) .hero-stat-num{
  color:var(--accent-green);
}

.page-about .hero-stat-label{
  font-size:12px;
  letter-spacing:.1em;
  color:var(--text-dim);
}

/* 旋转注释 */
.page-about .about-hero-note{
  position:absolute;
  right:0;
  top:80px;
  display:none;
  writing-mode:vertical-rl;
  gap:14px;
}

.page-about .hero-est{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.28em;
  color:var(--accent-blue);
}

/* 章节通用 */
.page-about .section-block{
  position:relative;
  padding:56px 0;
  border-top:1px solid transparent;
}

.page-about .section-block + .section-block{
  border-top-color:var(--line-panel);
}

.page-about .section-heading{
  display:flex;
  align-items:center;
  gap:16px;
  margin-bottom:36px;
  padding-left:14px;
  border-left:3px solid var(--accent-blue);
  transform:skewX(-3deg);
}

.page-about .section-heading .skew-label{
  font-family:var(--font-mono);
  font-size:13px;
  color:var(--accent-green);
  letter-spacing:.14em;
}

.page-about .section-heading h2{
  font-family:var(--font-head);
  font-weight:800;
  font-size:clamp(22px,3vw,32px);
  margin:0;
  letter-spacing:.01em;
}

.page-about .section-heading .rotated-note{
  display:none;
  margin-left:auto;
  writing-mode:vertical-rl;
  font-size:11px;
  letter-spacing:.32em;
  color:var(--text-faint);
  text-transform:uppercase;
}

/* 01 品牌简介 */
.page-about .intro-layout{
  display:grid;
  grid-template-columns:1fr;
  gap:32px;
}

.page-about .intro-main p{
  margin:0 0 16px;
}

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

.page-about .intro-main b{
  color:var(--accent-blue);
  font-weight:700;
}

.page-about .intro-spec{
  background:var(--bg-panel);
  border:1px solid var(--line-panel);
  border-left:2px solid var(--accent-blue);
  position:relative;
  padding:24px;
  display:flex;
  flex-direction:column;
  gap:18px;
  border-radius:0 2px 2px 0;
}

.page-about .intro-spec::before{
  content:"";
  position:absolute;
  top:0;
  right:0;
  width:64px;
  height:3px;
  background:linear-gradient(90deg,var(--accent-blue),transparent);
}

.page-about .intro-spec::after{
  content:"";
  position:absolute;
  bottom:0;
  left:0;
  width:100%;
  height:100%;
  pointer-events:none;
  background:linear-gradient(180deg,rgba(0,212,255,.02),transparent 48%);
}

.page-about .intro-spec-title{
  font-size:14px;
  font-weight:800;
  letter-spacing:.24em;
  text-transform:uppercase;
  color:var(--accent-green);
  margin:0;
}

.page-about .profile-dl{
  margin:0;
  display:flex;
  flex-direction:column;
  gap:0;
}

.page-about .profile-dl-row{
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  gap:8px 16px;
  padding:12px 0;
  border-bottom:1px dashed var(--line-panel);
}

.page-about .profile-dl-row:last-child{
  border-bottom:none;
}

.page-about .profile-dl-row dt{
  color:var(--text-dim);
  font-size:13px;
  letter-spacing:.06em;
}

.page-about .profile-dl-row dd{
  margin:0;
  font-family:var(--font-mono);
  font-size:13px;
  color:var(--text-paper);
}

.page-about .intro-status{
  display:inline-flex;
  align-items:center;
  gap:8px;
  align-self:flex-start;
  margin-top:auto;
  padding:6px 12px;
  background:rgba(198,255,61,.06);
  border:1px solid rgba(198,255,61,.18);
  border-radius:2px;
}

.page-about .intro-status-text{
  font-size:12px;
  letter-spacing:.12em;
  color:var(--accent-green);
  font-weight:700;
}

/* 02 发展节点 */
.page-about .about-timeline{
  padding-left:0;
  padding-right:0;
}

.page-about .timeline-hero{
  position:relative;
  margin-bottom:44px;
  overflow:hidden;
  border-radius:2px;
  border:1px solid var(--line-panel);
}

.page-about .timeline-hero-img{
  display:block;
  width:100%;
  height:auto;
  max-width:100%;
  object-fit:cover;
  filter:brightness(.72) saturate(1.1) hue-rotate(-8deg);
}

.page-about .timeline-lead{
  padding:18px 20px;
  margin:0;
  font-size:14px;
  line-height:1.7;
  color:var(--text-dim);
  background:var(--bg-panel);
  border-top:1px solid var(--line-panel);
}

.page-about .timeline-lead::before{
  content:"↑ ";
  color:var(--accent-blue);
  font-family:var(--font-mono);
}

/* 时间线 */
.page-about .timeline-wrap{
  position:relative;
  padding-left:36px;
}

.page-about .timeline-wrap::before{
  content:"";
  position:absolute;
  left:12px;
  top:0;
  bottom:0;
  width:2px;
  background:linear-gradient(180deg,var(--accent-blue) 0%,rgba(0,212,255,.15) 40%,var(--accent-green) 100%);
  opacity:.8;
}

.page-about .timeline-list{
  list-style:none;
  margin:0;
  padding:0;
  display:flex;
  flex-direction:column;
  gap:28px;
}

.page-about .timeline-item{
  position:relative;
  display:grid;
  grid-template-columns:1fr;
  gap:10px;
}

.page-about .timeline-marker{
  position:absolute;
  left:-36px;
  top:4px;
  width:26px;
  height:26px;
  display:flex;
  align-items:center;
  justify-content:center;
  background:var(--bg-ink);
  border:2px solid var(--accent-blue);
  border-radius:50%;
  z-index:1;
}

.page-about .timeline-marker::before{
  content:"";
  position:absolute;
  inset:-5px;
  border:1px solid rgba(0,212,255,.2);
  border-radius:50%;
  transform:scale(.8);
  opacity:.6;
}

.page-about .timeline-item:nth-last-child(1) .timeline-marker{
  border-color:var(--accent-green);
}

.page-about .timeline-item:nth-last-child(1) .timeline-marker::before{
  border-color:rgba(198,255,61,.3);
}

.page-about .timeline-marker time{
  font-family:var(--font-mono);
  font-size:9px;
  font-weight:800;
  color:var(--accent-blue);
  letter-spacing:.02em;
}

.page-about .timeline-item:nth-last-child(1) .timeline-marker time{
  color:var(--accent-green);
}

.page-about .timeline-card{
  background:var(--bg-panel);
  border:1px solid var(--line-panel);
  border-radius:2px;
  position:relative;
  padding:18px 18px 16px;
  transition:border-color .2s, box-shadow .2s, transform .2s;
}

.page-about .timeline-card::before{
  content:"";
  position:absolute;
  left:-24px;
  top:20px;
  width:22px;
  height:1px;
  background:linear-gradient(90deg,var(--accent-blue),transparent);
  opacity:.55;
}

.page-about .timeline-card:hover,
.page-about .timeline-card:focus-within{
  border-color:rgba(0,212,255,.4);
  box-shadow:0 8px 24px rgba(0,0,0,.32);
  transform:translateY(-2px);
}

.page-about .timeline-card-title{
  font-size:17px;
  font-weight:800;
  margin:0 0 10px;
  line-height:1.4;
  letter-spacing:.01em;
}

.page-about .timeline-card p{
  margin:0 0 12px;
  font-size:14px;
  line-height:1.7;
  color:var(--text-dim);
}

.page-about .timeline-tags{
  display:flex;
  flex-wrap:wrap;
  gap:6px;
}

/* 03 数据 */
.page-about .data-layout{
  display:grid;
  grid-template-columns:1fr;
  gap:36px;
}

.page-about .data-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:1px;
  background:var(--line-panel);
  border:1px solid var(--line-panel);
  border-radius:2px;
  overflow:hidden;
}

.page-about .data-card{
  background:var(--bg-panel);
  padding:22px 16px 20px;
  display:flex;
  flex-direction:column;
  gap:8px;
  min-height:128px;
  position:relative;
  transition:background .2s;
}

.page-about .data-card:hover{
  background:var(--bg-panel-2);
}

.page-about .data-card-accent{
  background:linear-gradient(145deg,var(--bg-panel) 55%,rgba(0,212,255,.1));
}

.page-about .data-card-label{
  font-size:12px;
  letter-spacing:.14em;
  color:var(--text-dim);
  text-transform:uppercase;
}

.page-about .data-card-value{
  font-family:var(--font-mono);
  font-size:clamp(26px,4vw,40px);
  font-weight:800;
  line-height:1;
  color:var(--accent-blue);
  letter-spacing:-.03em;
}

.page-about .data-card:nth-child(2) .data-card-value,
.page-about .data-card:nth-child(5) .data-card-value{
  color:var(--accent-green);
}

.page-about .data-card:nth-child(3) .data-card-value{
  color:var(--amber);
}

.page-about .data-card-unit{
  font-size:13px;
  color:var(--text-dim);
}

.page-about .data-disclaimer{
  margin:14px 0 0;
  padding-left:14px;
  border-left:2px solid var(--amber);
  font-size:12px;
  line-height:1.6;
  color:var(--text-dim);
}

.page-about .data-media{
  margin:0;
  padding:0;
  border:1px solid var(--line-panel);
  border-radius:2px;
  background:var(--bg-panel);
  overflow:hidden;
  position:relative;
}

.page-about .data-media-img{
  display:block;
  width:100%;
  height:auto;
  max-width:100%;
  object-fit:cover;
  filter:brightness(.78) saturate(1.05);
}

.page-about .data-media-caption{
  display:flex;
  align-items:center;
  gap:14px;
  padding:14px 18px;
  border-top:1px solid var(--line-panel);
  font-size:13px;
  color:var(--text-dim);
  letter-spacing:.06em;
  background:var(--bg-panel);
}

/* 04 团队 */
.page-about .team-layout{
  display:grid;
  grid-template-columns:1fr;
  gap:36px;
}

.page-about .team-copy p{
  margin:0 0 18px;
}

.page-about .team-copy b{
  color:var(--accent-blue);
}

.page-about .team-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:14px;
  margin-top:26px;
}

.page-about .team-unit{
  background:var(--bg-panel);
  border:1px solid var(--line-panel);
  border-left:2px solid var(--accent-blue);
  padding:18px 16px 14px;
  position:relative;
  transition:border-color .2s, background .2s;
}

.page-about .team-unit:hover{
  border-left-color:var(--accent-green);
  background:var(--bg-panel-2);
}

.page-about .team-unit-id{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.18em;
  color:var(--text-faint);
  display:block;
  margin-bottom:10px;
}

.page-about .team-unit-name{
  margin:0 0 6px;
  font-size:15px;
  font-weight:800;
}

.page-about .team-unit-desc{
  margin:0;
  font-size:12px;
  color:var(--text-dim);
  line-height:1.6;
}

.page-about .team-media{
  margin:0 0 20px;
  border:1px solid var(--line-panel);
  border-radius:2px;
  background:var(--bg-panel);
  overflow:hidden;
}

.page-about .team-media-img{
  display:block;
  width:100%;
  height:auto;
  max-width:100%;
  object-fit:cover;
  filter:brightness(.8) saturate(1.08);
}

.page-about .team-media-caption{
  display:flex;
  align-items:center;
  gap:14px;
  padding:12px 16px;
  border-top:1px solid var(--line-panel);
  font-size:12px;
  letter-spacing:.05em;
  color:var(--text-dim);
}

.page-about .team-partner{
  background:var(--bg-panel);
  border:1px solid var(--line-panel);
  border-right:2px solid var(--accent-green);
  padding:20px;
  position:relative;
}

.page-about .team-partner-title{
  font-size:14px;
  font-weight:800;
  letter-spacing:.12em;
  color:var(--accent-green);
  margin:0 0 10px;
}

.page-about .team-partner p{
  margin:0 0 16px;
  font-size:13px;
  line-height:1.7;
  color:var(--text-dim);
}

.page-about .partner-status{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:12px;
  color:var(--text-paper);
  letter-spacing:.06em;
  padding-top:12px;
  border-top:1px dashed var(--line-panel);
}

/* 05 服务理念 */
.page-about .promise-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:18px;
  margin-bottom:28px;
}

.page-about .promise-item{
  position:relative;
  background:var(--bg-panel);
  border:1px solid var(--line-panel);
  padding:26px 20px 22px;
  overflow:hidden;
  transition:border-color .2s, transform .2s;
}

.page-about .promise-item:hover{
  border-color:rgba(0,212,255,.32);
  transform:translateY(-2px);
}

.page-about .promise-item::after{
  content:"";
  position:absolute;
  right:-20px;
  bottom:-20px;
  width:90px;
  height:90px;
  background:linear-gradient(135deg,transparent 48%,rgba(0,212,255,.08));
  border-radius:50%;
}

.page-about .promise-indicator{
  display:block;
  width:30px;
  height:3px;
  margin-bottom:18px;
}

.page-about .promise-indicator-blue{
  background:linear-gradient(90deg,var(--accent-blue),transparent);
}

.page-about .promise-indicator-green{
  background:linear-gradient(90deg,var(--accent-green),transparent);
}

.page-about .promise-indicator-amber{
  background:linear-gradient(90deg,var(--amber),transparent);
}

.page-about .promise-item-title{
  font-size:19px;
  font-weight:800;
  margin:0 0 12px;
  letter-spacing:.05em;
}

.page-about .promise-item p{
  margin:0;
  font-size:14px;
  line-height:1.72;
  color:var(--text-dim);
}

.page-about .promise-bar{
  border-top:1px solid var(--line-panel);
  border-bottom:1px solid var(--line-panel);
  padding:22px 0;
  margin-bottom:32px;
}

.page-about .promise-bar p{
  margin:0;
  font-size:14px;
  line-height:1.85;
  color:var(--text-dim);
}

.page-about .promise-bar .link{
  color:var(--accent-blue);
  border-bottom:1px dashed rgba(0,212,255,.4);
  text-decoration:none;
  transition:color .2s,border-color .2s;
}

.page-about .promise-bar .link:hover{
  color:var(--accent-green);
  border-bottom-color:rgba(198,255,61,.5);
}

.page-about .promise-back{
  display:flex;
  justify-content:flex-start;
}

/* 按钮 */
.page-about .btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:12px 24px;
  border-radius:2px;
  font-weight:700;
  font-size:14px;
  letter-spacing:.08em;
  text-decoration:none;
  border:1px solid transparent;
  transition:background .2s,border-color .2s,color .2s,transform .2s;
  line-height:1;
}

.page-about .btn-primary{
  background:var(--accent-blue);
  color:#04121f;
  transform:skewX(-3deg);
}

.page-about .btn-primary:hover{
  background:#67e2ff;
}

.page-about .btn-primary .btn-label{
  display:inline-block;
  transform:skewX(3deg);
}

/* 状态点 */
.page-about .status-dot{
  display:inline-block;
  width:8px;
  height:8px;
  border-radius:50%;
  flex-shrink:0;
}

.page-about .status-green{
  background:var(--accent-green);
  box-shadow:0 0 8px rgba(198,255,61,.6);
}

/* 中等屏幕（平板） */
@media (min-width: 640px){
  .page-about .page-shell{
    padding-left:28px;
    padding-right:28px;
  }

  .page-about .data-grid{
    grid-template-columns:repeat(3,minmax(0,1fr));
  }

  .page-about .team-grid{
    grid-template-columns:repeat(4,minmax(0,1fr));
    gap:12px;
  }

  .page-about .promise-grid{
    grid-template-columns:repeat(3,1fr);
    gap:14px;
  }

  .page-about .intro-spec{
    padding:28px;
  }

  .page-about .timeline-card{
    padding:20px 22px 18px;
  }

  .page-about .about-hero-stats{
    grid-template-columns:repeat(3,1fr);
  }

  .page-about .about-hero-note{
    display:none;
  }
}

/* 桌面 */
@media (min-width: 1024px){
  .page-about .page-shell{
    padding-left:48px;
    padding-right:48px;
  }

  .page-about .about-hero{
    grid-template-columns:minmax(0,1fr) minmax(320px,420px);
    gap:48px;
    align-items:end;
  }

  .page-about .about-hero .about-hero-copy{
    grid-column:1;
  }

  .page-about .about-hero-stats{
    grid-column:2;
    grid-row:1;
    margin-bottom:4px;
  }

  .page-about .about-hero-note{
    display:flex;
  }

  .page-about .intro-layout{
    grid-template-columns:minmax(0,1fr) 340px;
    gap:48px;
    align-items:start;
  }

  .page-about .intro-spec{
    position:sticky;
    top:calc(var(--header-h) + 24px);
    padding:28px 26px;
  }

  .page-about .section-heading .rotated-note{
    display:inline-block;
  }

  .page-about .section-heading{
    padding-left:18px;
  }

  /* 时间线桌面列 */
  .page-about .timeline-list{
    display:grid;
    grid-template-columns:1fr 1fr;
    gap:36px 48px;
  }

  .page-about .timeline-item:nth-child(even){
    transform:translateY(28px);
  }

  .page-about .timeline-card::after{
    content:"";
    position:absolute;
    right:10px;
    top:10px;
    width:6px;
    height:6px;
    background:var(--accent-blue);
    opacity:.25;
    transition:opacity .2s;
  }

  .page-about .timeline-card:hover::after{
    opacity:1;
  }

  /* 数据 */
  .page-about .data-layout{
    grid-template-columns:minmax(0,1fr) 420px;
    gap:48px;
    align-items:start;
  }

  .page-about .data-media{
    position:sticky;
    top:calc(var(--header-h) + 24px);
  }

  .page-about .data-card{
    min-height:150px;
    padding:26px 20px 22px;
  }

  .page-about .data-card-value{
    font-size:clamp(28px,3vw,42px);
  }

  /* 团队 */
  .page-about .team-layout{
    grid-template-columns:minmax(0,1fr) 360px;
    gap:56px;
    align-items:start;
  }

  .page-about .team-side{
    position:sticky;
    top:calc(var(--header-h) + 24px);
  }

  .page-about .team-grid{
    grid-template-columns:repeat(2,minmax(0,1fr));
    gap:16px;
  }

  /* 服务理念 */
  .page-about .promise-grid{
    gap:18px;
  }

  .page-about .promise-item{
    padding:30px 24px 26px;
  }

  .page-about .promise-back{
    justify-content:flex-end;
  }
}

/* 大屏 */
@media (min-width: 1440px){
  .page-about .page-shell{
    padding-left:64px;
    padding-right:64px;
  }

  .page-about .about-hero{
    gap:56px;
  }

  .page-about .intro-layout{
    grid-template-columns:minmax(0,1fr) 380px;
  }

  .page-about .data-layout{
    grid-template-columns:minmax(0,1fr) 480px;
  }

  .page-about .team-layout{
    grid-template-columns:minmax(0,1fr) 400px;
  }

  .page-about .timeline-lead{
    padding:20px 28px;
    font-size:15px;
  }
}

/* 减少动效偏好 */
@media (prefers-reduced-motion: reduce){
  .page-about .timeline-card:hover,
  .page-about .timeline-card:focus-within,
  .page-about .data-card:hover,
  .page-about .promise-item:hover{
    transform:none;
    transition:none;
  }
}