.page-about{
  position: relative;
  background: var(--color-primary);
  color: var(--color-text);
  overflow: hidden;
}
.page-about::before{
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(115deg, transparent 0 78%, rgba(0,255,136,0.035) 78.2% 78.6%, transparent 78.8%),
    linear-gradient(35deg, transparent 0 86%, rgba(255,77,0,0.03) 86.2% 86.6%, transparent 86.8%);
  pointer-events: none;
  z-index: 0;
}
.page-about > *{
  position: relative;
  z-index: 1;
}

/* 英雄区 */
.about-hero{
  padding: 72px 0 56px;
  background:
    radial-gradient(ellipse at 85% 20%, rgba(0,255,136,0.06), transparent 55%),
    radial-gradient(ellipse at 15% 90%, rgba(255,77,0,0.05), transparent 45%),
    var(--color-primary-deep);
  border-bottom: 1px solid var(--color-border);
}
.about-hero-inner{
  display: grid;
  grid-template-columns: 1fr;
  gap: 44px;
  align-items: center;
}
.about-hero-badge{
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--color-text-mid);
  letter-spacing: 0.04em;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  padding: 7px 16px;
  margin-bottom: 24px;
}
.about-hero h1{
  font-family: var(--font-heading);
  font-size: clamp(2.6rem, 7vw, 4.2rem);
  line-height: 1.04;
  letter-spacing: 0.01em;
  margin: 0 0 20px;
  text-transform: uppercase;
}
.about-hero-lead{
  font-size: 1.25rem;
  line-height: 1.7;
  color: var(--color-text);
  margin: 0 0 16px;
  max-width: 52rem;
}
.about-hero-desc{
  font-size: 1rem;
  line-height: 1.8;
  color: var(--color-text-mid);
  margin: 0 0 32px;
  max-width: 52rem;
}
.about-hero-actions{
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}
.about-hero-visual svg{
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  box-shadow: 0 30px 80px rgba(0,0,0,0.35);
}
@media (min-width: 900px){
  .about-hero{
    padding: 88px 0 72px;
  }
  .about-hero-inner{
    grid-template-columns: 1.08fr 0.92fr;
    gap: 68px;
  }
}

/* 面包屑 */
.page-about .breadcrumb{
  padding-top: 28px;
  margin-bottom: 8px;
}

/* 章节公共头 */
.page-about .section-head{
  margin-bottom: 40px;
}
.page-about .section-head .section-label{
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.page-about .section-head .section-title{
  margin: 14px 0 14px;
  font-size: clamp(1.9rem, 4vw, 2.6rem);
  line-height: 1.18;
}
.page-about .section-head .section-subtitle{
  color: var(--color-text-mid);
  font-size: 1.02rem;
  line-height: 1.8;
  max-width: 640px;
  margin: 0;
}

/* 发展历程区 */
.about-journey{
  padding: 88px 0 96px;
  border-bottom: 1px solid var(--color-border);
}

/* 时间轴 */
.about-timeline{
  position: relative;
  padding-left: 32px;
  margin-bottom: 48px;
}
.about-timeline::before{
  content: "";
  position: absolute;
  left: 10px;
  top: 6px;
  bottom: 6px;
  width: 2px;
  background: linear-gradient(to bottom, var(--color-accent), var(--color-hot) 60%, var(--color-accent));
  opacity: 0.25;
  border-radius: 2px;
}
.timeline-item{
  position: relative;
  padding-bottom: 40px;
}
.timeline-item:last-child{
  padding-bottom: 0;
}
.timeline-item::before{
  content: "";
  position: absolute;
  left: -28px;
  top: 8px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--color-accent);
  border: 3px solid var(--color-primary-deep);
  box-shadow: 0 0 0 2px var(--color-accent), 0 0 18px rgba(0,255,136,0.45);
  z-index: 1;
}
.timeline-phase{
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--color-accent);
  background: rgba(0,255,136,0.07);
  border: 1px solid rgba(0,255,136,0.18);
  border-radius: var(--radius-pill);
  padding: 5px 14px;
  margin-bottom: 12px;
}
.timeline-card{
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 26px 28px;
  transition: transform 0.28s ease, background 0.28s ease, border-color 0.28s ease, box-shadow 0.28s ease;
}
.timeline-card:hover{
  transform: translateY(-4px);
  background: var(--color-card-hover);
  border-color: rgba(0,255,136,0.28);
  box-shadow: 0 16px 40px rgba(0,0,0,0.22);
}
.timeline-title{
  font-size: 1.35rem;
  font-family: var(--font-heading);
  font-weight: 700;
  letter-spacing: 0.02em;
  margin: 0 0 10px;
}
.timeline-desc{
  font-size: 0.98rem;
  line-height: 1.8;
  color: var(--color-text-mid);
  margin: 0;
}
.timeline-desc strong{
  color: var(--color-accent);
  font-weight: 600;
}
.timeline-tags{
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}
.timeline-tags span{
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--color-text-mid);
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  padding: 4px 12px;
}

/* 时间轴配图 */
.timeline-photo{
  margin: 56px 0 64px;
}
.timeline-photo img{
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  display: block;
}
.timeline-photo figcaption{
  margin-top: 12px;
  font-size: 0.85rem;
  color: var(--color-text-mid);
  font-family: var(--font-mono);
}

/* 版本进化展示 */
.about-version-feature{
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  background: var(--color-primary-deep);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  overflow: hidden;
}
.version-media{
  order: 2;
}
.version-media img{
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius-md);
  display: block;
}
.version-info{
  order: 1;
}
.version-title{
  font-family: var(--font-heading);
  font-size: 1.6rem;
  line-height: 1.3;
  margin: 14px 0 12px;
}
.version-desc{
  font-size: 0.98rem;
  line-height: 1.8;
  color: var(--color-text-mid);
  margin: 0 0 20px;
}
.version-list{
  list-style: none;
  padding: 0;
  margin: 0 0 28px;
  display: grid;
  gap: 10px;
}
.version-list li{
  position: relative;
  padding-left: 28px;
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--color-text-mid);
}
.version-list li::before{
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-accent);
  box-shadow: 0 0 8px rgba(0,255,136,0.5);
}
.version-list li:nth-child(2n)::before{
  background: var(--color-hot);
  box-shadow: 0 0 8px rgba(255,77,0,0.4);
}
.version-list li strong{
  color: var(--color-text);
  font-weight: 600;
}
@media (min-width: 820px){
  .about-version-feature{
    grid-template-columns: 260px 1fr;
    gap: 48px;
    padding: 40px;
  }
  .version-media{
    order: 1;
  }
  .version-info{
    order: 2;
  }
}

/* 服务理念区 */
.about-philosophy{
  padding: 88px 0 96px;
  border-bottom: 1px solid var(--color-border);
  background:
    linear-gradient(135deg, transparent 0 88%, rgba(0,255,136,0.03) 88.4% 88.8%, transparent 89%),
    var(--color-primary);
}
.philosophy-grid{
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}
.philosophy-card{
  position: relative;
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  transition: transform 0.3s ease, background 0.3s ease, border-color 0.3s ease;
  overflow: hidden;
}
.philosophy-card:hover{
  transform: translateY(-6px);
  background: var(--color-card-hover);
  border-color: rgba(0,255,136,0.22);
}
.philosophy-no{
  font-family: var(--font-mono);
  font-size: 2.4rem;
  font-weight: 700;
  color: transparent;
  -webkit-text-stroke: 1px rgba(0,255,136,0.4);
  position: absolute;
  top: 20px;
  right: 24px;
  line-height: 1;
  opacity: 0.8;
}
.philosophy-icon{
  width: 56px;
  height: 56px;
  margin-bottom: 20px;
}
.philosophy-icon svg{
  width: 100%;
  height: 100%;
  display: block;
}
.philosophy-card h3{
  font-size: 1.4rem;
  font-family: var(--font-heading);
  letter-spacing: 0.02em;
  margin: 0 0 12px;
}
.philosophy-card p{
  font-size: 0.95rem;
  line-height: 1.85;
  color: var(--color-text-mid);
  margin: 0;
}
@media (min-width: 760px){
  .philosophy-grid{
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }
  .philosophy-card{
    padding: 44px 32px;
  }
}

/* 数据与资质区 */
.about-data{
  padding: 88px 0 80px;
  background:
    radial-gradient(ellipse at 80% 10%, rgba(0,255,136,0.045), transparent 50%),
    var(--color-primary-deep);
}
.about-data-grid{
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 48px;
}
.data-card{
  padding: 28px 20px;
  text-align: center;
}
.data-card .data-value{
  font-family: var(--font-mono);
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--color-accent);
  line-height: 1.1;
  display: block;
  margin-bottom: 6px;
}
.data-card:nth-child(2) .data-value{
  color: var(--color-hot);
}
.data-card .data-label{
  font-size: 0.9rem;
  color: var(--color-text-mid);
  letter-spacing: 0.04em;
}
@media (min-width: 760px){
  .about-data-grid{
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
  }
  .data-card{
    padding: 36px 20px;
  }
  .data-card .data-value{
    font-size: 2.8rem;
  }
}

/* 视觉行 */
.about-visual-row{
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  align-items: stretch;
  margin-bottom: 48px;
}
.about-data-figure{
  margin: 0;
}
.about-data-figure img{
  width: 100%;
  max-width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--radius-lg);
  display: block;
  min-height: 260px;
}
.about-compliance{
  padding: 32px 28px;
}
.about-compliance .section-label{
  margin-bottom: 12px;
}
.compliance-title{
  font-family: var(--font-heading);
  font-size: 1.4rem;
  margin: 0 0 12px;
}
.compliance-desc{
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--color-text-mid);
  margin: 0 0 22px;
}
.compliance-list{
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--color-border);
}
.compliance-row{
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 0;
  border-bottom: 1px solid var(--color-border);
}
.compliance-row dt{
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--color-text-mid);
  letter-spacing: 0.04em;
  white-space: nowrap;
}
.compliance-row dd{
  margin: 0;
  font-size: 0.92rem;
  color: var(--color-text);
  text-align: right;
}
@media (min-width: 900px){
  .about-visual-row{
    grid-template-columns: 1fr 420px;
    gap: 28px;
  }
}

/* 日志链接 */
.about-journal-link{
  text-align: center;
  padding: 40px 0 24px;
}
.about-journal-link p{
  font-size: 1.05rem;
  color: var(--color-text-mid);
  margin: 0 0 18px;
}

/* 窄屏适配 */
@media (max-width: 480px){
  .about-hero{
    padding: 56px 0 44px;
  }
  .about-journey,
  .about-philosophy,
  .about-data{
    padding: 64px 0 72px;
  }
  .timeline-card{
    padding: 20px;
  }
  .about-version-feature{
    padding: 20px;
  }
  .data-card .data-value{
    font-size: 1.7rem;
  }
  .philosophy-card{
    padding: 28px 24px;
  }
  .about-compliance{
    padding: 24px 20px;
  }
}