.page-about{
  --about-section-pad:clamp(52px,7vw,104px);
  --about-gap:clamp(28px,4vw,56px);
  --about-heading-size:clamp(28px,4vw,42px);
}

/* ===== Hero ===== */
.page-about .about-hero{
  position:relative;
  overflow:hidden;
  color:#fff;
  background:
    linear-gradient(115deg,rgba(212,160,23,0.22) 0%,rgba(26,92,66,0) 46%),
    linear-gradient(180deg,var(--color-primary-dark) 0%,var(--color-primary) 100%);
  padding:clamp(44px,6vw,80px) var(--container-pad) clamp(40px,6vw,68px);
}
.page-about .about-hero-shape{
  position:absolute;
  top:90px;
  right:-70px;
  width:230px;
  height:130px;
  background:rgba(212,160,23,0.85);
  transform:rotate(-14deg);
  border-radius:6px;
  pointer-events:none;
  z-index:0;
}
.page-about .about-hero::after{
  content:"";
  position:absolute;
  inset:0;
  background-image:
    linear-gradient(rgba(255,255,255,0.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,0.05) 1px,transparent 1px);
  background-size:36px 36px;
  mask-image:linear-gradient(90deg,transparent 25%,#000 70%);
  pointer-events:none;
}
.page-about .about-hero-inner{
  position:relative;
  z-index:1;
  max-width:var(--container-max);
  margin-inline:auto;
}
.page-about .about-hero .breadcrumbs{
  margin:0 0 22px;
}
.page-about .about-hero .breadcrumbs a{
  color:rgba(255,255,255,0.78);
  text-decoration:none;
  transition:color var(--transition-fast);
}
.page-about .about-hero .breadcrumbs a:hover{
  color:#fff;
}
.page-about .about-hero .breadcrumbs [aria-current="page"]{
  color:var(--color-accent-light);
}
.page-about .about-hero-eyebrow{
  margin:0 0 12px;
  font-family:var(--font-data);
  font-size:14px;
  letter-spacing:0.16em;
  text-transform:uppercase;
  color:var(--color-accent-light);
}
.page-about .about-hero h1{
  margin:0 0 16px;
  max-width:780px;
  font-size:clamp(34px,6vw,62px);
  line-height:1.08;
  letter-spacing:-0.02em;
  font-weight:900;
  font-style:italic;
}
.page-about .about-hero-lead{
  max-width:640px;
  margin:0 0 30px;
  font-size:clamp(17px,2.4vw,21px);
  line-height:1.75;
  color:rgba(255,255,255,0.9);
}
.page-about .about-hero-actions{
  display:flex;
  flex-wrap:wrap;
  gap:12px;
}
.page-about .about-hero .btn-outline{
  border-color:rgba(255,255,255,0.68);
  color:#fff;
}
.page-about .about-hero .btn-outline:hover,
.page-about .about-hero .btn-outline:focus{
  background:rgba(255,255,255,0.14);
  border-color:#fff;
  color:#fff;
}
.page-about .about-hero-stats{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:12px 16px;
  margin:40px 0 0;
}
.page-about .about-hero-stat{
  padding:16px 18px;
  background:rgba(255,255,255,0.08);
  border:1px solid rgba(255,255,255,0.12);
  border-radius:var(--radius);
  backdrop-filter:blur(6px);
}
.page-about .about-hero-stat-label{
  margin:0 0 8px;
  font-size:13px;
  color:rgba(255,255,255,0.7);
}
.page-about .about-hero-stat-number{
  margin:0;
  font-family:var(--font-data);
  font-weight:700;
  font-size:clamp(28px,4vw,42px);
  line-height:1;
  color:var(--color-accent-light);
}

/* ===== 两栏布局与目录 ===== */
.page-about .about-layout{
  display:grid;
  grid-template-columns:minmax(0,1fr);
  gap:32px;
  padding-block:clamp(36px,5vw,64px);
}
.page-about .about-main{
  min-width:0;
  display:grid;
  gap:clamp(40px,6vw,72px);
}
.page-about .about-toc{
  display:flex;
  flex-wrap:nowrap;
  overflow-x:auto;
  gap:8px;
  padding:10px 12px;
  margin-inline:calc(var(--container-pad) * -1);
  border-radius:0;
  background:rgba(255,255,255,0.82);
  backdrop-filter:blur(10px);
  box-shadow:var(--shadow-sm);
  scrollbar-width:none;
  -webkit-tap-highlight-color:transparent;
}
.page-about .about-toc::-webkit-scrollbar{
  display:none;
}
.page-about .about-toc-title{
  flex:0 0 auto;
  align-self:center;
  margin:0 8px 0 0;
  font-size:13px;
  font-weight:700;
  letter-spacing:0.1em;
  color:var(--color-text-muted);
}
.page-about .about-toc-link{
  flex:0 0 auto;
  display:inline-flex;
  align-items:center;
  padding:10px 14px;
  border-radius:999px;
  background:transparent;
  color:var(--color-text);
  font-size:14px;
  font-weight:600;
  line-height:1;
  text-decoration:none;
  transition:background var(--transition-fast),color var(--transition-fast);
}
.page-about .about-toc-link:hover,
.page-about .about-toc-link:focus,
.page-about .about-toc-link:active{
  background:rgba(212,160,23,0.16);
  color:var(--color-accent-dark);
}
.page-about .about-toc-status{
  flex:0 0 auto;
  display:flex;
  align-items:center;
  gap:8px;
  margin-left:auto;
  padding:10px 4px;
  font-size:13px;
  color:var(--color-text-muted);
  white-space:nowrap;
}

/* ===== 章节通用 ===== */
.page-about .about-section{
  scroll-margin-top:104px;
}
.page-about .about-section-head{
  display:flex;
  align-items:baseline;
  gap:14px;
  margin-bottom:24px;
}
.page-about .about-section-index{
  font-family:var(--font-data);
  font-weight:700;
  font-size:15px;
  color:var(--color-accent-dark);
}
.page-about .about-section-head h2{
  margin:0;
  font-size:var(--about-heading-size);
  font-weight:900;
  line-height:1.2;
  color:var(--color-primary);
}
.page-about .about-section-lead{
  margin:0 0 20px;
  font-size:15px;
  line-height:1.6;
  color:var(--color-text-muted);
}

/* ===== 品牌故事 ===== */
.page-about .about-brand-grid{
  display:grid;
  gap:28px;
}
.page-about .about-brand-copy p{
  margin:0 0 16px;
  font-size:15px;
  line-height:1.8;
  color:var(--color-text);
}
.page-about .about-mission{
  margin:24px 0 0;
  padding:10px 0 10px 18px;
  border-left:4px solid var(--color-accent);
  background:linear-gradient(90deg,rgba(212,160,23,0.1),rgba(212,160,23,0));
  font-size:clamp(17px,2vw,21px);
  font-weight:700;
  line-height:1.6;
  color:var(--color-primary);
}
.page-about .about-brand-figure,
.page-about .about-milestones-figure,
.page-about .about-commit-figure{
  margin:0;
}
.page-about .about-brand-figure img{
  width:100%;
  height:auto;
  aspect-ratio:4 / 3;
  object-fit:cover;
  border-radius:var(--radius);
  box-shadow:var(--shadow-md);
}
.page-about .about-brand-figure figcaption,
.page-about .about-milestones-figure figcaption,
.page-about .about-commit-figure figcaption{
  margin-top:10px;
  font-size:13px;
  color:var(--color-text-muted);
}

/* ===== 发展历程 ===== */
.page-about .about-section--milestones{
  background:linear-gradient(135deg,rgba(212,160,23,0.1) 0%,rgba(212,160,23,0) 56%);
  border:1px solid rgba(212,160,23,0.28);
  border-radius:var(--radius);
  padding:clamp(24px,4vw,40px);
}
.page-about .about-milestones-grid{
  display:grid;
  gap:32px;
  align-items:center;
}
.page-about .about-timeline{
  list-style:none;
  margin:0;
  padding:0;
  display:grid;
  gap:8px;
}
.page-about .about-timeline-item{
  position:relative;
  padding:12px 0 16px 22px;
  transition:background var(--transition-fast),transform var(--transition-fast);
  border-radius:var(--radius-sm);
}
.page-about .about-timeline-item::before{
  content:"";
  position:absolute;
  left:0;
  top:20px;
  width:12px;
  height:12px;
  border-radius:50%;
  background:var(--color-surface);
  border:3px solid var(--color-accent);
  box-shadow:0 0 0 4px rgba(212,160,23,0.18);
}
.page-about .about-timeline-item:not(:last-child)::after{
  content:"";
  position:absolute;
  left:5px;
  top:36px;
  bottom:-8px;
  width:2px;
  background:linear-gradient(180deg,var(--color-accent),rgba(212,160,23,0.12));
}
.page-about .about-timeline-item:hover{
  background:rgba(255,255,255,0.7);
  transform:translateX(4px);
}
.page-about .about-timeline-marker{
  display:inline-block;
  padding:4px 12px;
  border-radius:999px;
  background:rgba(212,160,23,0.14);
  color:var(--color-accent-dark);
  font-family:var(--font-data);
  font-size:13px;
  font-weight:700;
  letter-spacing:0.04em;
  margin-bottom:8px;
}
.page-about .about-timeline-content h3{
  margin:0 0 6px;
  font-size:19px;
  font-weight:800;
  color:var(--color-primary);
}
.page-about .about-timeline-content p{
  margin:0;
  font-size:14px;
  line-height:1.7;
  color:var(--color-text-muted);
}
.page-about .about-milestones-figure{
  order:-1;
}
.page-about .about-milestones-figure img{
  width:100%;
  height:auto;
  aspect-ratio:2 / 1;
  object-fit:cover;
  border-radius:var(--radius);
  box-shadow:var(--shadow-md);
}

/* ===== 数据能力 ===== */
.page-about .about-section--data{
  position:relative;
  background:
    radial-gradient(circle at 90% 0%,rgba(212,160,23,0.2),rgba(212,160,23,0) 42%),
    linear-gradient(150deg,var(--color-primary-light) 0%,var(--color-primary) 58%,var(--color-primary-dark) 100%);
  border-radius:var(--radius);
  padding:clamp(28px,5vw,48px);
  color:#fff;
  overflow:hidden;
}
.page-about .about-section--data::before{
  content:"";
  position:absolute;
  right:-80px;
  bottom:-80px;
  width:260px;
  height:260px;
  border:36px solid rgba(212,160,23,0.13);
  border-radius:50%;
  pointer-events:none;
}
.page-about .about-section--data .about-data-velocity{
  position:absolute;
  right:0;
  bottom:0;
  width:min(480px,70%);
  height:auto;
  opacity:0.15;
  pointer-events:none;
}
.page-about .about-section--data > *:not(.about-data-velocity){
  position:relative;
  z-index:1;
}
.page-about .about-section--data .about-section-head h2,
.page-about .about-section--data .about-section-lead{
  color:#fff;
}
.page-about .about-section--data .about-section-index{
  color:var(--color-accent-light);
}
.page-about .about-section--data .about-section-lead{
  color:rgba(255,255,255,0.82);
}
.page-about .about-section-flag{
  margin-bottom:20px;
}
.page-about .about-data-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:14px;
}
.page-about .about-data-card{
  padding:22px 20px;
  background:rgba(255,255,255,0.08);
  border:1px solid rgba(255,255,255,0.12);
  border-radius:var(--radius);
  transition:background var(--transition-fast),transform var(--transition-fast);
}
.page-about .about-data-card:hover{
  background:rgba(255,255,255,0.13);
  transform:translateY(-3px);
}
.page-about .about-data-number{
  display:block;
  margin-bottom:12px;
  font-family:var(--font-data);
  font-size:clamp(42px,7vw,64px);
  font-weight:700;
  line-height:1;
  color:var(--color-accent-light);
  letter-spacing:-0.02em;
}
.page-about .about-data-label{
  margin:0 0 8px;
  font-size:17px;
  font-weight:800;
  color:#fff;
}
.page-about .about-data-caption{
  margin:0;
  font-size:14px;
  line-height:1.65;
  color:rgba(255,255,255,0.78);
}
.page-about .about-data-note{
  margin:24px 0 0;
  font-size:14px;
  color:rgba(255,255,255,0.82);
}
.page-about .about-data-note a{
  color:var(--color-accent-light);
  text-decoration:none;
  border-bottom:1px solid rgba(230,190,74,0.4);
}
.page-about .about-data-note a:hover{
  color:#fff;
  border-color:#fff;
}

/* ===== 服务承诺 ===== */
.page-about .about-section--commit{
  position:relative;
  background:
    linear-gradient(160deg,rgba(212,160,23,0.08) 0%,rgba(212,160,23,0) 40%),
    var(--color-bg);
  border-radius:var(--radius);
  padding:clamp(24px,4vw,40px);
}
.page-about .about-commit-grid{
  display:grid;
  gap:28px;
  position:relative;
  z-index:1;
}
.page-about .about-commit-list{
  list-style:none;
  margin:0;
  padding:0;
  display:grid;
  gap:16px;
}
.page-about .about-commit-item{
  padding:18px 20px;
  background:var(--color-surface);
  border-left:4px solid var(--color-accent);
  border-radius:var(--radius-sm);
  box-shadow:var(--shadow-sm);
  transition:box-shadow var(--transition-fast),transform var(--transition-fast);
}
.page-about .about-commit-item:hover{
  box-shadow:var(--shadow-md);
  transform:translateX(3px);
}
.page-about .about-commit-item h3{
  margin:0 0 6px;
  font-size:17px;
  font-weight:800;
  color:var(--color-primary);
}
.page-about .about-commit-item p{
  margin:0;
  font-size:14px;
  line-height:1.7;
  color:var(--color-text-muted);
}
.page-about .about-commit-contact{
  margin-top:20px;
  padding:20px;
  background:var(--color-primary);
  border-radius:var(--radius);
  color:#fff;
}
.page-about .about-commit-contact-label{
  margin:0 0 8px;
  font-size:12px;
  font-weight:700;
  letter-spacing:0.14em;
  text-transform:uppercase;
  color:var(--color-accent-light);
}
.page-about .about-commit-contact-mail{
  margin:0 0 6px;
  font-size:18px;
  font-weight:800;
  color:#fff;
}
.page-about .about-commit-contact-meta{
  margin:0;
  font-size:14px;
  color:rgba(255,255,255,0.82);
}
.page-about .about-commit-contact-note{
  margin:12px 0 0;
  padding-top:12px;
  border-top:1px solid rgba(255,255,255,0.16);
  font-size:13px;
  line-height:1.6;
  color:rgba(255,255,255,0.72);
}
.page-about .about-commit-figure img{
  width:100%;
  height:auto;
  aspect-ratio:4 / 3;
  object-fit:cover;
  border-radius:var(--radius);
  box-shadow:var(--shadow-lg);
}
.page-about .about-commit-links{
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  margin-top:28px;
  position:relative;
  z-index:1;
}
.page-about .about-commit-links .btn{
  flex:1 1 auto;
  min-width:140px;
}

/* ===== 平板与桌面增强 ===== */
@media (min-width:600px){
  .page-about .about-section--milestones{
    padding:clamp(28px,5vw,48px);
  }
  .page-about .about-data-grid{
    grid-template-columns:repeat(2,1fr);
  }
}
@media (min-width:760px){
  .page-about .about-hero-stats{
    grid-template-columns:repeat(4,1fr);
  }
  .page-about .about-brand-grid{
    grid-template-columns:minmax(0,1.1fr) minmax(0,0.9fr);
    gap:48px;
    align-items:center;
  }
}
@media (min-width:820px){
  .page-about .about-commit-grid{
    grid-template-columns:minmax(0,1fr) minmax(0,0.9fr);
    gap:40px;
    align-items:center;
  }
}
@media (min-width:900px){
  .page-about .about-layout{
    grid-template-columns:240px minmax(0,1fr);
    gap:48px;
  }
  .page-about .about-toc{
    position:sticky;
    top:24px;
    flex-direction:column;
    align-items:stretch;
    overflow:visible;
    gap:4px;
    margin:0;
    padding:18px;
    border-radius:var(--radius);
    align-self:start;
    box-shadow:var(--shadow-md);
  }
  .page-about .about-toc-title{
    margin:0 0 8px;
    padding-bottom:10px;
    border-bottom:1px solid var(--color-border);
    text-transform:uppercase;
  }
  .page-about .about-toc-link{
    border-radius:var(--radius-sm);
    white-space:normal;
  }
  .page-about .about-toc-status{
    margin:16px 0 0;
    border-top:1px solid var(--color-border);
    padding:14px 4px 4px;
  }
  .page-about .about-milestones-grid{
    grid-template-columns:minmax(0,1.05fr) minmax(0,0.95fr);
    gap:40px;
  }
  .page-about .about-milestones-figure{
    order:2;
  }
}
@media (min-width:1000px){
  .page-about .about-data-grid{
    grid-template-columns:repeat(3,1fr);
  }
}
@media (prefers-reduced-motion:no-preference){
  .page-about .about-timeline-item,
  .page-about .about-data-card,
  .page-about .about-commit-item{
    transition:background var(--transition-base),box-shadow var(--transition-base),transform var(--transition-base);
  }
}