/* ============ 品牌概况页专属样式 ============ */
.page-about{
  --about-gold:#FFD700;
  --about-orange:#FF8C00;
  --about-red:#FF3B30;
  --about-graphite:#1C1C1E;
  --about-ink:#111111;
  --about-mist:#F2F2F7;
  --about-white:#FFFFFF;
  position:relative;
  overflow-x:clip;
  background:var(--about-graphite);
  color:var(--about-white);
}

/* 面包屑深色适配 */
.page-about .breadcrumb{
  max-width:var(--max-w);
  margin-inline:auto;
  padding:20px 24px 0;
}
.page-about .breadcrumb__link{
  text-decoration:none;
  color:rgba(255,255,255,.58);
  transition:color .25s;
}
.page-about .breadcrumb__link:hover{
  color:var(--about-gold);
}
.page-about .breadcrumb__current{
  color:var(--about-gold);
  font-weight:600;
}

/* 统一节标题 */
.page-about .section-heading{
  position:relative;
  padding-left:18px;
  margin-bottom:36px;
}
.page-about .section-heading::before{
  content:'';
  position:absolute;
  left:0;
  top:6px;
  bottom:6px;
  width:4px;
  border-radius:4px;
  background:linear-gradient(180deg,var(--about-gold),var(--about-orange));
}
.page-about .section-title{
  font-size:26px;
  line-height:1.25;
  font-weight:800;
  letter-spacing:-.01em;
  margin-top:6px;
  color:var(--about-white);
}
.page-about .section-description{
  margin-top:8px;
  font-size:14px;
  color:rgba(255,255,255,.6);
}
.page-about .eyebrow{
  font-family:var(--font-mono);
  font-size:13px;
  color:var(--about-gold);
  text-transform:uppercase;
  letter-spacing:.14em;
}

/* 品牌故事 */
.page-about .story-section{
  position:relative;
  padding:48px 24px 72px;
}
.page-about .story-section::before{
  content:'';
  position:absolute;
  inset:0;
  pointer-events:none;
  background:
    radial-gradient(circle at 14% 22%,rgba(255,59,48,.20),transparent 42%),
    radial-gradient(circle at 86% 70%,rgba(255,215,0,.14),transparent 38%);
}
.page-about .story-layout{
  position:relative;
  display:grid;
  gap:40px;
  align-items:center;
  max-width:var(--max-w);
  margin-inline:auto;
}
.page-about .story-copy .eyebrow{
  color:var(--about-gold);
}
.page-about .story-copy h1{
  font-size:38px;
  line-height:1.2;
  font-weight:800;
  letter-spacing:-.02em;
  margin:12px 0 20px;
  color:var(--about-white);
}
.page-about .story-lead{
  font-size:18px;
  line-height:1.7;
  color:rgba(255,255,255,.85);
}
.page-about .story-copy p{
  margin:16px 0 0;
  font-size:15px;
  color:rgba(255,255,255,.66);
}
.page-about .story-cta{
  margin-top:24px;
}
.page-about .story-figure{
  margin:0;
  border:1px solid rgba(255,215,0,.30);
  border-radius:20px;
  overflow:hidden;
  background:rgba(255,255,255,.04);
  box-shadow:0 24px 70px rgba(0,0,0,.35);
}
.page-about .story-image{
  display:block;
  width:100%;
  height:auto;
  object-fit:cover;
}
.page-about .story-caption{
  padding:12px 16px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:rgba(255,255,255,.6);
  border-top:1px solid rgba(255,215,0,.22);
}

/* 发展里程碑 */
.page-about .milestone-section{
  position:relative;
  padding:72px 0 80px;
  background:var(--about-ink);
  overflow:hidden;
}
.page-about .milestone-bg{
  position:absolute;
  inset:0;
  pointer-events:none;
}
.page-about .milestone-bg-img{
  width:100%;
  height:100%;
  object-fit:cover;
  opacity:.16;
  filter:saturate(.35);
}
.page-about .milestone-bg::after{
  content:'';
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,rgba(17,17,17,.90),rgba(17,17,17,.76) 48%,rgba(17,17,17,.94));
}
.page-about .milestone-particle{
  position:absolute;
  z-index:1;
  border-radius:50%;
  filter:blur(1.5px);
  pointer-events:none;
}
.page-about .milestone-particle.p1{
  top:16%;
  left:7%;
  width:13px;
  height:13px;
  background:rgba(255,59,48,.5);
}
.page-about .milestone-particle.p2{
  top:58%;
  right:8%;
  width:8px;
  height:8px;
  background:rgba(255,215,0,.55);
}
.page-about .milestone-particle.p3{
  top:38%;
  left:64%;
  width:11px;
  height:11px;
  background:rgba(255,140,0,.4);
}
.page-about .milestone-heading{
  margin-bottom:40px;
}

/* 时间轴 */
.page-about .timeline{
  position:relative;
  padding:20px 0 8px;
}
.page-about .timeline::before{
  content:'';
  position:absolute;
  top:0;
  bottom:0;
  left:24px;
  width:2px;
  background:linear-gradient(180deg,var(--about-gold) 0%,var(--about-orange) 72%,var(--about-red) 100%);
  opacity:.55;
}
.page-about .timeline__item{
  position:relative;
  padding-left:64px;
  margin-bottom:36px;
}
.page-about .timeline__dot{
  position:absolute;
  left:16px;
  top:26px;
  width:16px;
  height:16px;
  border-radius:50%;
  background:var(--about-gold);
  box-shadow:0 0 0 4px rgba(255,215,0,.16),0 0 22px rgba(255,215,0,.55);
}
.page-about .timeline__card{
  background:rgba(255,255,255,.045);
  border:1px solid rgba(255,255,255,.09);
  border-radius:16px;
  padding:22px;
  transition:transform .28s ease,border-color .28s ease,background .28s ease;
}
.page-about .timeline__card:hover{
  transform:translateY(-4px);
  border-color:rgba(255,215,0,.42);
  background:rgba(255,255,255,.075);
}
.page-about .tag--year{
  display:inline-block;
  margin-bottom:10px;
  padding:3px 12px;
  border:1px solid rgba(255,215,0,.4);
  border-radius:999px;
  background:rgba(255,215,0,.08);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--about-gold);
}
.page-about .timeline__card h3{
  margin:0 0 8px;
  font-size:20px;
  font-weight:700;
  color:var(--about-white);
}
.page-about .timeline__card p{
  margin:0;
  font-size:14px;
  line-height:1.7;
  color:rgba(255,255,255,.66);
}
.page-about .timeline-link{
  display:inline-block;
  margin-top:12px;
  font-size:14px;
  text-decoration:none;
  color:var(--about-gold);
  border-bottom:1px solid rgba(255,215,0,.35);
  transition:color .25s,border-color .25s;
}
.page-about .timeline-link:hover{
  color:var(--about-orange);
  border-color:rgba(255,140,0,.5);
}

/* 资质与认证 */
.page-about .cert-section{
  padding:72px 0;
  background:var(--about-mist);
}
.page-about .cert-section .eyebrow,
.page-about .team-section .eyebrow{
  color:var(--about-orange);
}
.page-about .cert-section .section-title,
.page-about .team-section .section-title{
  color:var(--about-ink);
}
.page-about .cert-section .section-description,
.page-about .team-section .section-description{
  color:rgba(17,17,17,.64);
}
.page-about .cert-grid{
  display:grid;
  gap:20px;
}
.page-about .cert-card{
  background:#fff;
  border:1px solid var(--gray-light);
  border-radius:18px;
  padding:28px 24px;
  box-shadow:0 6px 24px rgba(0,0,0,.06);
  transition:transform .3s ease,box-shadow .3s ease,border-color .3s ease;
}
.page-about .cert-card:hover{
  transform:translateY(-6px);
  box-shadow:0 16px 38px rgba(0,0,0,.10);
  border-color:rgba(255,140,0,.35);
}
.page-about .cert-badge{
  display:flex;
  width:64px;
  height:64px;
  align-items:center;
  justify-content:center;
  margin-bottom:18px;
  border-radius:16px;
  background:rgba(255,215,0,.10);
  transition:transform .6s cubic-bezier(.2,.8,.2,1);
}
.page-about .cert-card:hover .cert-badge,
.page-about .cert-card:focus-within .cert-badge{
  transform:rotateY(360deg);
}
.page-about .cert-badge svg{
  width:54px;
  height:54px;
}
.page-about .cert-card h3{
  font-size:19px;
  line-height:1.4;
  font-weight:700;
  margin:0 0 10px;
  color:var(--about-ink);
}
.page-about .cert-card p{
  margin:0;
  font-size:14px;
  line-height:1.7;
  color:rgba(17,17,17,.66);
}

/* 合作伙伴 */
.page-about .partner-section{
  padding:72px 0;
  background:var(--about-graphite);
}
.page-about .partner-layout{
  display:grid;
  gap:36px;
  align-items:center;
  margin-top:8px;
}
.page-about .partner-copy p{
  margin:0 0 16px;
  font-size:15px;
  color:rgba(255,255,255,.68);
}
.page-about .partner-btn{
  margin-top:8px;
  border-color:rgba(255,215,0,.55);
  color:var(--about-gold);
}
.page-about .partner-btn:hover{
  background:rgba(255,215,0,.10);
}
.page-about .partner-stats{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:14px;
  padding:0;
  margin:0;
  list-style:none;
}
.page-about .stat-item{
  padding:20px 14px;
  text-align:center;
  background:rgba(255,255,255,.05);
  border:1px solid rgba(255,215,0,.18);
  border-radius:16px;
}
.page-about .stat-item__num{
  display:block;
  font-family:var(--font-mono);
  font-size:28px;
  font-weight:700;
  line-height:1.2;
  color:var(--about-gold);
}
.page-about .stat-item__label{
  display:block;
  margin-top:6px;
  font-size:13px;
  line-height:1.5;
  color:rgba(255,255,255,.62);
}

/* 团队与文化 */
.page-about .team-section{
  padding:72px 0;
  background:var(--about-mist);
  color:var(--about-ink);
}
.page-about .team-layout{
  display:grid;
  gap:36px;
  align-items:center;
}
.page-about .team-content p{
  margin:0 0 16px;
  font-size:15px;
  line-height:1.8;
  color:rgba(17,17,17,.72);
}
.page-about .team-figure{
  margin:0;
  border:1px solid #E5E5EA;
  border-radius:20px;
  overflow:hidden;
  background:#fff;
}
.page-about .team-image{
  display:block;
  width:100%;
  height:auto;
  object-fit:cover;
}
.page-about .team-caption{
  padding:12px 16px;
  font-family:var(--font-mono);
  font-size:12px;
  color:var(--gray);
  border-top:1px solid #E5E5EA;
}
.page-about .team-details{
  margin-top:8px;
  padding:16px 18px;
  border:1px solid #E5E5EA;
  border-radius:14px;
  background:#fff;
}
.page-about .team-details summary{
  display:flex;
  align-items:center;
  gap:10px;
  list-style:none;
  cursor:pointer;
  font-weight:700;
  font-size:15px;
  color:var(--about-ink);
}
.page-about .team-details summary::-webkit-details-marker{
  display:none;
}
.page-about .team-details summary::after{
  content:'+';
  margin-left:auto;
  font-family:var(--font-mono);
  font-size:22px;
  line-height:1;
  color:var(--about-orange);
  transition:transform .25s;
}
.page-about .team-details[open] summary::after{
  content:'−';
  transform:rotate(180deg);
}
.page-about .team-list{
  margin:16px 0 0;
  padding-left:20px;
  color:rgba(17,17,17,.72);
}
.page-about .team-list li{
  margin-bottom:8px;
  font-size:14px;
}

/* 桌面端布局 */
@media (min-width:768px){
  .page-about .story-layout{
    grid-template-columns:1.15fr .85fr;
  }
  .page-about .story-copy h1{
    font-size:48px;
  }
  .page-about .milestone-section{
    padding-top:88px;
    padding-bottom:96px;
  }
  .page-about .section-title{
    font-size:32px;
  }
  .page-about .timeline::before{
    left:50%;
    transform:translateX(-50%);
  }
  .page-about .timeline__item{
    width:50%;
    padding-left:0;
    margin-bottom:48px;
  }
  .page-about .timeline__item--left{
    padding-right:56px;
  }
  .page-about .timeline__item--right{
    margin-left:50%;
    padding-left:56px;
  }
  .page-about .timeline__item--left .timeline__dot{
    left:auto;
    right:-9px;
  }
  .page-about .timeline__item--right .timeline__dot{
    left:-9px;
  }
  .page-about .timeline__item--left .timeline__card{
    text-align:right;
  }
  .page-about .cert-grid{
    grid-template-columns:repeat(3,1fr);
  }
  .page-about .partner-layout{
    grid-template-columns:1fr 1fr;
    gap:48px;
  }
  .page-about .partner-stats{
    grid-template-columns:repeat(2,1fr);
    gap:16px;
  }
  .page-about .team-layout{
    grid-template-columns:1.1fr .9fr;
    gap:48px;
  }
  .page-about .stat-item__num{
    font-size:32px;
  }
}

@media (min-width:1024px){
  .page-about .partner-stats{
    grid-template-columns:repeat(4,1fr);
  }
}