/* ===== 品牌故事页面专属样式 ===== */
.page-about{
  background:var(--neutral-light);
  color:var(--neutral-dark);
  font-family:var(--font-body);
  line-height:1.75;
  overflow-x:hidden;
}
.page-about .breadcrumb{
  max-width:1200px;
  margin:0 auto;
  padding:18px 20px 0;
  font-size:13px;
  color:var(--primary);
}
.page-about .breadcrumb a{
  color:var(--data-cyan);
  text-decoration:none;
  transition:color .2s;
}
.page-about .breadcrumb a:hover{
  color:var(--accent);
}
.page-about .breadcrumb-sep{
  margin:0 8px;
  color:var(--neutral);
}

/* 首屏英雄区 */
.page-about .about-hero{
  background:
    radial-gradient(circle at 85% 20%,rgba(255,107,53,.18),transparent 42%),
    radial-gradient(circle at 18% 82%,rgba(0,180,216,.12),transparent 34%),
    var(--primary-deep);
  color:#fff;
  padding:72px 20px 64px;
  position:relative;
  overflow:hidden;
}
.page-about .about-hero-inner{
  max-width:1200px;
  margin:0 auto;
}
.page-about .about-hero .eyebrow{
  color:var(--accent);
  letter-spacing:.14em;
  text-transform:uppercase;
  font-size:13px;
  font-weight:700;
  margin-bottom:10px;
}
.page-about .about-hero h1{
  font-family:var(--font-heading);
  font-size:clamp(28px,5.4vw,48px);
  font-weight:800;
  line-height:1.22;
  letter-spacing:-.02em;
  max-width:900px;
  margin:0 0 18px;
}
.page-about .about-hero .lead{
  font-size:16px;
  line-height:1.85;
  opacity:.92;
  max-width:720px;
  margin-bottom:30px;
}
.page-about .about-hero-actions{
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  margin-bottom:44px;
}
.page-about .btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  border-radius:999px;
  padding:12px 26px;
  font-size:15px;
  font-weight:600;
  text-decoration:none;
  border:1.5px solid transparent;
  transition:background .2s,color .2s,border-color .2s,transform .2s,box-shadow .2s;
}
.page-about .btn-accent{
  background:var(--accent);
  color:#fff;
  box-shadow:0 8px 24px rgba(255,107,53,.3);
}
.page-about .btn-accent:hover{
  background:var(--accent-light);
  transform:translateY(-2px);
  box-shadow:0 12px 32px rgba(255,107,53,.38);
}
.page-about .btn-ghost{
  background:transparent;
  color:#fff;
  border-color:rgba(255,255,255,.5);
}
.page-about .btn-ghost:hover{
  border-color:var(--accent);
  color:var(--accent);
}
.page-about .hero-stats{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:14px;
  border-top:1px solid rgba(255,255,255,.16);
  padding-top:32px;
}
.page-about .hero-stat{
  background:rgba(255,255,255,.07);
  border:1px solid rgba(255,255,255,.12);
  border-radius:var(--radius);
  padding:18px 16px;
  -webkit-backdrop-filter:blur(8px);
  backdrop-filter:blur(8px);
  transition:border-color .25s,transform .25s;
}
.page-about .hero-stat:hover{
  border-color:var(--accent);
  transform:translateY(-3px);
}
.page-about .hero-stat-num{
  display:block;
  font-family:var(--font-data);
  font-size:clamp(24px,3.6vw,36px);
  font-weight:700;
  color:var(--accent);
  line-height:1.1;
}
.page-about .hero-stat-label{
  display:block;
  font-size:13px;
  color:rgba(255,255,255,.78);
  margin-top:6px;
  letter-spacing:.05em;
}

/* 章节通用 */
.page-about .about-section{
  padding:64px 20px;
}
.page-about .about-container{
  max-width:1200px;
  margin:0 auto;
}
.page-about .chapter-head{
  display:flex;
  flex-direction:column;
  gap:14px;
  align-items:flex-start;
  margin-bottom:38px;
}
.page-about .chapter-index{
  font-family:var(--font-data);
  font-weight:800;
  font-size:56px;
  line-height:1;
  color:var(--accent);
  white-space:nowrap;
}
.page-about .chapter-index::before{
  content:attr(data-index);
}
.page-about .chapter-title{
  font-family:var(--font-heading);
  font-size:clamp(24px,3.4vw,36px);
  line-height:1.3;
  font-weight:700;
  color:var(--primary-deep);
  margin:6px 0 8px;
}
.page-about .chapter-sub{
  font-size:15px;
  color:var(--neutral-dark);
  opacity:.78;
  margin-top:6px;
  max-width:560px;
}
.page-about .eyebrow{
  display:inline-block;
  font-size:13px;
  font-weight:700;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--accent);
  margin-bottom:2px;
}

/* 品牌缘起 */
.page-about .origin-section{
  background:#fff;
}
.page-about .origin-grid{
  display:grid;
  gap:28px;
}
.page-about .origin-copy p{
  font-size:15px;
  margin-bottom:16px;
}
.page-about .origin-lead{
  font-family:var(--font-heading);
  font-size:18px;
  line-height:1.8;
  color:var(--primary-deep);
  margin-bottom:16px;
  padding-left:16px;
  border-left:4px solid var(--accent);
}
.page-about .origin-media{
  margin:0;
  position:relative;
  overflow:hidden;
  border-radius:var(--radius);
  box-shadow:0 18px 48px rgba(11,36,71,.16);
}
.page-about .media-frame img{
  display:block;
  width:100%;
  height:auto;
  object-fit:cover;
}
.page-about .media-frame figcaption{
  font-size:13px;
  color:var(--neutral-dark);
  padding:14px 16px;
  background:#fff;
  border-top:1px solid var(--neutral);
  letter-spacing:.03em;
}
.page-about .origin-principles{
  display:grid;
  gap:16px;
  margin-top:36px;
}
.page-about .principle-card{
  background:var(--neutral-light);
  border:1px solid var(--neutral);
  border-radius:var(--radius);
  padding:26px 22px;
  transition:border-color .25s,box-shadow .25s,transform .25s;
}
.page-about .principle-card:hover{
  border-color:var(--accent);
  box-shadow:0 14px 38px rgba(11,36,71,.08);
  transform:translateY(-4px);
}
.page-about .principle-num{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:40px;
  height:40px;
  border-radius:12px;
  background:var(--primary-deep);
  color:#fff;
  font-family:var(--font-data);
  font-weight:700;
  font-size:18px;
  margin-bottom:16px;
}
.page-about .principle-card h3{
  font-family:var(--font-heading);
  font-size:18px;
  font-weight:700;
  color:var(--primary-deep);
  margin-bottom:8px;
}
.page-about .principle-card p{
  font-size:14px;
  margin:0;
}

/* 发展里程碑 */
.page-about .milestone-section{
  background:var(--neutral-light);
}
.page-about .timeline{
  position:relative;
  margin-top:20px;
}
.page-about .timeline::before{
  content:"";
  position:absolute;
  left:12px;
  top:10px;
  bottom:24px;
  width:2px;
  background:linear-gradient(to bottom,var(--accent),var(--neutral));
}
.page-about .timeline-item{
  position:relative;
  padding-left:52px;
  padding-bottom:42px;
}
.page-about .timeline-item:last-child{
  padding-bottom:0;
}
.page-about .timeline-marker{
  margin-bottom:14px;
}
.page-about .marker-dot{
  position:absolute;
  left:0;
  top:4px;
  width:26px;
  height:26px;
  border-radius:50%;
  background:var(--accent);
  border:5px solid var(--neutral-light);
  box-shadow:0 0 0 1px var(--accent),0 0 16px rgba(255,107,53,.28);
}
.page-about .marker-year{
  display:inline-block;
  font-family:var(--font-data);
  font-weight:700;
  font-size:16px;
  color:#fff;
  background:var(--primary);
  border-radius:999px;
  padding:4px 16px;
  letter-spacing:.05em;
}
.page-about .timeline-card{
  background:#fff;
  border:1px solid var(--neutral);
  border-radius:var(--radius);
  padding:26px 22px;
  transition:border-color .25s,box-shadow .25s,transform .25s;
}
.page-about .timeline-card:hover{
  border-color:var(--accent);
  box-shadow:0 14px 38px rgba(11,36,71,.1);
  transform:translateY(-2px);
}
.page-about .timeline-card h3{
  font-family:var(--font-heading);
  font-size:19px;
  font-weight:700;
  color:var(--primary-deep);
  margin-bottom:10px;
}
.page-about .timeline-card p{
  font-size:14px;
  margin:0;
}

/* 团队与组织 */
.page-about .team-section{
  background:#fff;
}
.page-about .team-layout{
  display:grid;
  gap:32px;
}
.page-about .team-copy p{
  font-size:15px;
  margin-bottom:16px;
}
.page-about .team-lead{
  font-family:var(--font-heading);
  font-size:18px;
  color:var(--primary-deep);
  font-weight:600;
  line-height:1.8;
}
.page-about .team-roles{
  display:grid;
  gap:16px;
  margin-top:28px;
}
.page-about .role-card{
  background:var(--neutral-light);
  border:1px solid var(--neutral);
  border-radius:var(--radius);
  padding:24px 20px;
  transition:border-color .25s,box-shadow .25s,transform .25s;
}
.page-about .role-card:hover{
  border-color:var(--accent);
  box-shadow:0 14px 34px rgba(11,36,71,.09);
  transform:translateY(-3px);
}
.page-about .role-count{
  display:inline-block;
  font-family:var(--font-data);
  font-size:42px;
  font-weight:700;
  color:var(--accent);
  line-height:1.1;
  margin-bottom:12px;
}
.page-about .role-unit{
  font-size:24px;
  color:var(--accent);
}
.page-about .role-title{
  display:block;
  font-size:16px;
  font-weight:700;
  color:var(--primary-deep);
  letter-spacing:.04em;
  margin-bottom:8px;
}
.page-about .role-desc{
  font-size:13px;
  color:var(--neutral-dark);
  opacity:.8;
  margin:0;
}
.page-about .team-media{
  margin:0;
  border-radius:var(--radius);
  overflow:hidden;
  box-shadow:0 18px 48px rgba(11,36,71,.14);
}

/* 资质与荣誉 */
.page-about .credential-section{
  background:var(--primary-deep);
  color:#fff;
}
.page-about .credential-section .chapter-title{
  color:#fff;
}
.page-about .credential-section .chapter-sub{
  color:rgba(255,255,255,.76);
}
.page-about .credential-grid{
  display:grid;
  gap:20px;
  margin-bottom:28px;
}
.page-about .credential-card{
  background:rgba(255,255,255,.08);
  border:1px solid rgba(255,255,255,.14);
  border-radius:var(--radius);
  padding:30px 24px;
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  transition:border-color .25s,transform .25s,box-shadow .25s;
}
.page-about .credential-card:hover{
  border-color:var(--accent);
  transform:translateY(-4px);
  box-shadow:0 16px 40px rgba(0,0,0,.28);
}
.page-about .credential-badge{
  display:inline-flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  width:76px;
  height:76px;
  background:var(--accent);
  border-radius:18px;
  margin-bottom:18px;
  box-shadow:0 12px 28px rgba(255,107,53,.34);
}
.page-about .badge-top{
  font-family:var(--font-data);
  font-size:20px;
  font-weight:800;
  line-height:1;
  letter-spacing:.06em;
}
.page-about .badge-bottom{
  font-family:var(--font-data);
  font-size:12px;
  font-weight:600;
  line-height:1;
  margin-top:5px;
}
.page-about .credential-card h3{
  font-family:var(--font-heading);
  font-size:19px;
  font-weight:700;
  color:#fff;
  margin-bottom:10px;
}
.page-about .credential-card p{
  font-size:14px;
  color:rgba(255,255,255,.82);
  margin-bottom:18px;
}
.page-about .credential-card .tag{
  display:inline-block;
  font-size:12px;
  font-weight:600;
  letter-spacing:.06em;
  padding:6px 14px;
  border-radius:999px;
}
.page-about .credential-card .tag-accent{
  background:rgba(255,107,53,.2);
  color:var(--accent-light);
  border:1px solid rgba(255,107,53,.36);
}
.page-about .credential-bottom{
  display:grid;
  gap:22px;
}
.page-about .credential-media{
  margin:0;
  border-radius:var(--radius);
  overflow:hidden;
  box-shadow:0 18px 48px rgba(0,0,0,.32);
}
.page-about .credential-media figcaption{
  background:rgba(255,255,255,.06);
  color:rgba(255,255,255,.7);
  border-top:1px solid rgba(255,255,255,.12);
  font-size:13px;
  padding:14px 16px;
}
.page-about .credential-note{
  background:rgba(255,255,255,.08);
  border:1px solid rgba(255,255,255,.14);
  border-radius:var(--radius);
  padding:28px 24px;
  -webkit-backdrop-filter:blur(8px);
  backdrop-filter:blur(8px);
}
.page-about .credential-note p{
  font-size:14px;
  color:rgba(255,255,255,.84);
  margin-bottom:12px;
}
.page-about .credential-note p:last-child{
  margin-bottom:0;
}

/* 合作生态 */
.page-about .partner-section{
  background:var(--neutral-light);
}
.page-about .partner-lead{
  font-size:15px;
  max-width:680px;
  margin-bottom:30px;
}
.page-about .partner-grid{
  display:grid;
  gap:18px;
}
.page-about .partner-card{
  background:#fff;
  border:1px solid var(--neutral);
  border-radius:var(--radius);
  padding:24px 22px;
  transition:border-color .25s,box-shadow .25s,transform .25s;
}
.page-about .partner-card:hover{
  border-color:var(--accent);
  box-shadow:0 16px 40px rgba(11,36,71,.1);
  transform:translateY(-3px);
}
.page-about .partner-card summary{
  cursor:pointer;
  list-style:none;
  display:flex;
  flex-direction:column;
  gap:8px;
}
.page-about .partner-card summary::-webkit-details-marker{
  display:none;
}
.page-about .partner-type{
  display:inline-block;
  align-self:flex-start;
  font-size:12px;
  font-weight:700;
  letter-spacing:.1em;
  text-transform:uppercase;
  color:var(--data-cyan);
  background:rgba(0,180,216,.1);
  border-radius:999px;
  padding:5px 14px;
}
.page-about .partner-card-title{
  font-family:var(--font-heading);
  font-size:18px;
  font-weight:700;
  color:var(--primary-deep);
  margin:4px 0 2px;
}
.page-about .partner-preview{
  font-size:14px;
  color:var(--neutral-dark);
  opacity:.8;
  line-height:1.7;
}
.page-about .partner-more{
  display:inline-block;
  align-self:flex-start;
  font-size:13px;
  font-weight:600;
  color:var(--accent);
  margin-top:6px;
  transition:color .2s;
}
.page-about .partner-card[open] .partner-more{
  color:var(--accent-light);
}
.page-about .partner-details{
  border-top:1px dashed var(--neutral);
  margin-top:16px;
  padding-top:16px;
  font-size:14px;
  color:var(--neutral-dark);
}
.page-about .partner-details p{
  margin:0;
}

/* CTA区块 */
.page-about .about-cta-section{
  background:
    radial-gradient(circle at 12% 20%,rgba(0,180,216,.16),transparent 40%),
    radial-gradient(circle at 88% 80%,rgba(255,107,53,.14),transparent 36%),
    var(--primary);
  color:#fff;
  padding:80px 20px;
  text-align:center;
}
.page-about .about-cta-section .about-container{
  max-width:780px;
}
.page-about .about-cta-section h2{
  font-family:var(--font-heading);
  font-size:clamp(26px,4vw,40px);
  font-weight:800;
  color:#fff;
  margin:10px 0 14px;
  letter-spacing:-.02em;
}
.page-about .about-cta-section p{
  font-size:15px;
  opacity:.88;
  margin-bottom:28px;
  line-height:1.8;
}
.page-about .about-cta-actions{
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  justify-content:center;
}

/* ===== 响应式增强 ===== */
@media (min-width:768px){
  .page-about .hero-stats{
    grid-template-columns:repeat(4,1fr);
    gap:16px;
  }
  .page-about .origin-grid{
    grid-template-columns:1fr 1fr;
    gap:36px;
    align-items:start;
  }
  .page-about .origin-principles{
    grid-template-columns:repeat(3,1fr);
    gap:18px;
  }
  .page-about .timeline-item{
    display:grid;
    grid-template-columns:200px 1fr;
    gap:48px;
    padding-left:0;
    padding-bottom:48px;
  }
  .page-about .timeline::before{
    left:99px;
  }
  .page-about .timeline-marker{
    margin-bottom:0;
    position:relative;
  }
  .page-about .marker-dot{
    left:86px;
    top:10px;
  }
  .page-about .marker-year{
    font-size:20px;
    padding:6px 20px;
    margin-left:130px;
  }
  .page-about .timeline-card{
    padding:30px 26px;
  }
  .page-about .team-layout{
    grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);
    gap:44px;
    align-items:start;
  }
  .page-about .team-roles{
    grid-template-columns:repeat(3,1fr);
    gap:16px;
  }
  .page-about .role-card{
    padding:26px 18px;
  }
  .page-about .role-count{
    font-size:36px;
  }
  .page-about .credential-grid{
    grid-template-columns:repeat(2,1fr);
    gap:22px;
  }
  .page-about .credential-bottom{
    grid-template-columns:minmax(0,1fr) minmax(0,1fr);
    gap:24px;
    align-items:stretch;
  }
  .page-about .partner-grid{
    grid-template-columns:repeat(3,1fr);
    gap:20px;
  }
}

@media (min-width:1024px){
  .page-about .about-section{
    padding:88px 24px;
  }
  .page-about .chapter-head{
    flex-direction:row;
    gap:28px;
    align-items:flex-start;
    margin-bottom:48px;
  }
  .page-about .chapter-head > div{
    padding-top:6px;
  }
  .page-about .chapter-index{
    font-size:72px;
  }
  .page-about .chapter-title{
    font-size:38px;
  }
  .page-about .timeline-item{
    grid-template-columns:240px 1fr;
    gap:72px;
  }
  .page-about .timeline::before{
    left:119px;
  }
  .page-about .marker-dot{
    left:106px;
  }
  .page-about .marker-year{
    font-size:22px;
    margin-left:152px;
  }
  .page-about .timeline-card p{
    font-size:15px;
  }
  .page-about .role-count{
    font-size:44px;
  }
  .page-about .credential-card{
    padding:36px 30px;
  }
  .page-about .credential-note{
    display:flex;
    flex-direction:column;
    justify-content:center;
  }
  .page-about .credential-note p{
    font-size:15px;
  }
  .page-about .partner-card{
    padding:30px 26px;
  }
  .page-about .partner-card-title{
    font-size:20px;
  }
}