.page-about{
  --about-pad: clamp(20px, 4vw, 56px);
  --about-max: calc(var(--container-width) + 80px);
  background:
    radial-gradient(circle at 88% 12%, rgba(57,255,20,0.06), transparent 30%),
    radial-gradient(circle at 12% 80%, rgba(255,107,53,0.08), transparent 35%),
    var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  line-height: 1.65;
  overflow-x: hidden;
}

/* 面包屑 */
.page-about .breadcrumb{
  display: flex;
  align-items: center;
  gap: 8px;
  max-width: var(--about-max);
  margin-inline: auto;
  padding: 18px var(--about-pad) 0;
  font-family: var(--font-mono);
  font-size: .8rem;
  color: var(--color-text-secondary);
}
.page-about .breadcrumb a{
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: color var(--transition);
}
.page-about .breadcrumb a:hover{
  color: var(--color-primary);
}
.page-about .breadcrumb-sep{
  color: var(--color-border);
}

/* ---------- 英雄首屏：框景 + 2016 ---------- */
.page-about .about-hero{
  position: relative;
  max-width: var(--about-max);
  margin-inline: auto;
  padding: 24px var(--about-pad) 0;
}
.page-about .hero-frame{
  position: relative;
  border: 2px solid var(--color-border);
  outline: 1px solid rgba(45,70,89,.4);
  outline-offset: 6px;
  padding: 42px var(--about-pad) 50px;
  overflow: hidden;
  background:
    linear-gradient(rgba(45,70,89,.26) 1px, transparent 1px),
    linear-gradient(90deg, rgba(45,70,89,.26) 1px, transparent 1px);
  background-size: 44px 44px;
  background-position: center;
}
.page-about .hero-frame::before{
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 74% 18%, rgba(255,107,53,.16), transparent 52%);
  pointer-events: none;
}
.page-about .hero-edge{
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  z-index: 2;
}
.page-about .hero-edge-top{
  top: 0;
  background: linear-gradient(90deg, var(--color-primary), transparent 70%);
}
.page-about .hero-edge-bottom{
  bottom: 0;
  background: linear-gradient(270deg, var(--color-highlight), transparent 70%);
}
.page-about .hero-corner{
  position: absolute;
  width: 14px;
  height: 14px;
  z-index: 3;
  border-color: var(--color-highlight);
  border-style: solid;
}
.page-about .hero-corner-tl{
  top: -2px;
  left: -2px;
  border-width: 3px 0 0 3px;
}
.page-about .hero-corner-tr{
  top: -2px;
  right: -2px;
  border-width: 3px 3px 0 0;
}
.page-about .hero-corner-bl{
  bottom: -2px;
  left: -2px;
  border-width: 0 0 3px 3px;
}
.page-about .hero-corner-br{
  right: -2px;
  bottom: -2px;
  border-width: 0 3px 3px 0;
}
.page-about .hero-kicker{
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 18px;
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .18em;
  color: var(--color-text-secondary);
}
.page-about .hero-kicker span:not(:last-child)::after{
  content: "·";
  margin-left: 12px;
  color: var(--color-primary);
}
.page-about .hero-title{
  position: relative;
  z-index: 1;
  margin: 0;
  font-family: var(--font-headings);
  font-size: clamp(1.9rem, 4.8vw, 3.4rem);
  line-height: 1.08;
  letter-spacing: .01em;
}
.page-about .hero-title-main{
  display: block;
}
.page-about .hero-title-sub{
  display: block;
  color: var(--color-primary);
}
.page-about .hero-title-sep{
  display: none;
}
.page-about .hero-year-ghost{
  position: relative;
  z-index: 0;
  display: block;
  margin: 12px 0 6px;
  font-family: var(--font-headings);
  font-size: clamp(7rem, 30vw, 15rem);
  line-height: .92;
  color: rgba(255,107,53,.12);
  letter-spacing: -.03em;
  user-select: none;
}
.page-about .hero-lead{
  position: relative;
  z-index: 1;
  max-width: 56ch;
  margin: 14px 0 0;
  font-size: 1.02rem;
  line-height: 1.8;
  color: var(--color-text-secondary);
}
.page-about .hero-stats{
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--color-border);
  padding-top: 18px;
}
.page-about .hero-stats li{
  display: flex;
  flex-direction: column;
  border-left: 2px solid var(--color-border);
  padding-left: 12px;
}
.page-about .hs-num{
  font-family: var(--font-headings);
  font-size: 1.5rem;
  line-height: 1.2;
  color: var(--color-highlight);
}
.page-about .hs-cap{
  font-size: .78rem;
  color: var(--color-text-secondary);
  letter-spacing: .06em;
}

/* 本页锚点索引 */
.page-about .about-anchors{
  display: flex;
  flex-wrap: wrap;
  gap: 8px 14px;
  max-width: var(--about-max);
  margin: 26px auto 0;
  padding: 0 var(--about-pad);
}
.page-about .about-anchors a{
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  border: 1px solid var(--color-border);
  font-size: .84rem;
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: all var(--transition);
}
.page-about .about-anchors a span{
  font-family: var(--font-mono);
  font-size: .72rem;
  color: var(--color-primary);
}
.page-about .about-anchors a:hover{
  color: var(--color-text);
  border-color: var(--color-primary);
  transform: translateY(-2px);
}

/* ---------- 通用板块骨架 ---------- */
.page-about .about-section{
  position: relative;
  max-width: var(--about-max);
  margin-inline: auto;
  padding: 72px var(--about-pad) 8px;
}
.page-about .section-idx{
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 20px;
  padding-top: 12px;
  border-top: 1px solid var(--color-border);
}
.page-about .idx-num{
  font-family: var(--font-headings);
  font-size: 1.2rem;
  color: var(--color-primary);
}
.page-about .idx-en{
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .2em;
  color: var(--color-text-secondary);
}
.page-about .section-body{
  max-width: 100%;
}
.page-about .section-head{
  margin-bottom: 40px;
}
.page-about .section-h2{
  margin: 0 0 8px;
  font-family: var(--font-headings);
  font-size: clamp(1.7rem, 3.5vw, 2.5rem);
  line-height: 1.2;
}
.page-about .section-head p{
  max-width: 60ch;
  margin: 0;
  color: var(--color-text-secondary);
}

/* ---------- 品牌故事 ---------- */
.page-about .story-grid{
  display: grid;
  gap: 32px;
}
.page-about .story-title{
  margin: 0;
  font-family: var(--font-headings);
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  line-height: 1.35;
}
.page-about .story-copy p{
  margin: 0 0 16px;
  color: var(--color-text-secondary);
}
.page-about .story-quote{
  margin: 28px 0 0;
  padding: 20px 24px;
  border-left: 3px solid var(--color-primary);
  background: linear-gradient(90deg, rgba(255,107,53,.1), transparent 80%);
}
.page-about .story-quote p{
  margin: 0 0 6px;
  font-family: var(--font-headings);
  font-size: 1.3rem;
  color: var(--color-text);
}
.page-about .story-quote cite{
  font-style: normal;
  font-size: .82rem;
  color: var(--color-highlight);
}

/* ---------- 发展里程碑 ---------- */
.page-about .milestone-layout{
  display: grid;
  gap: 48px;
}
.page-about .timeline-list{
  position: relative;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .timeline-list::before{
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 23px;
  width: 2px;
  background: linear-gradient(180deg, var(--color-primary) 0%, var(--color-highlight) 100%);
  transform: translateX(-1px);
}
.page-about .tl-item{
  display: grid;
  grid-template-columns: 46px 1fr;
  gap: 12px;
  align-items: start;
  margin-bottom: 34px;
}
.page-about .tl-card{
  grid-column: 2;
  position: relative;
  background: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  padding: 18px 20px;
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
}
.page-about .tl-card::before{
  content: "";
  position: absolute;
  top: 24px;
  left: -1px;
  width: 2px;
  height: 24px;
  background: var(--color-primary);
  opacity: .6;
}
.page-about .tl-card:hover{
  transform: translateY(-4px);
  border-color: rgba(255,107,53,.6);
  box-shadow: 0 10px 24px rgba(9,17,26,.45);
}
.page-about .tl-card h3{
  margin: 4px 0 6px;
  font-family: var(--font-headings);
  font-size: 1.08rem;
  letter-spacing: .03em;
}
.page-about .tl-card p{
  margin: 0;
  font-size: .9rem;
  color: var(--color-text-secondary);
}
.page-about .tl-year{
  display: block;
  font-family: var(--font-mono);
  font-size: .84rem;
  letter-spacing: .14em;
  color: var(--color-primary);
}
.page-about .tl-dot{
  grid-column: 1;
  justify-self: end;
  align-self: start;
  margin-top: 22px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--color-primary);
  border: 3px solid var(--color-bg-deep);
  box-shadow: 0 0 0 2px var(--color-border), 0 0 12px rgba(255,107,53,.5);
  transition: all var(--transition);
}
.page-about .tl-dot:hover{
  background: var(--color-highlight);
  box-shadow: 0 0 0 2px var(--color-primary), 0 0 22px rgba(57,255,20,.65);
}
.page-about .milestone-figure{
  margin: 0;
  border: 1px solid var(--color-border);
  background: var(--color-bg-deep);
  overflow: hidden;
}
.page-about .milestone-figure img{
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.page-about .milestone-figure figcaption{
  padding: 12px 16px;
  font-family: var(--font-mono);
  font-size: .76rem;
  letter-spacing: .1em;
  color: var(--color-text-secondary);
  border-top: 1px solid var(--color-border);
}

/* ---------- 技术实力 ---------- */
.page-about .tech-stat-band{
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 40px;
}
.page-about .tech-stat{
  position: relative;
  background: var(--color-bg-deep);
  border: 1px solid var(--color-border);
  padding: 20px 16px;
  overflow: hidden;
  transition: transform var(--transition), border-color var(--transition);
}
.page-about .tech-stat::after{
  content: "";
  position: absolute;
  right: -12px;
  bottom: -12px;
  width: 48px;
  height: 48px;
  border: 2px solid var(--color-border);
  border-radius: 50%;
  opacity: .4;
}
.page-about .tech-stat:hover{
  transform: translateY(-3px);
  border-color: rgba(57,255,20,.5);
}
.page-about .tech-num{
  display: block;
  font-family: var(--font-headings);
  font-size: 1.9rem;
  line-height: 1.1;
  color: var(--color-highlight);
}
.page-about .tech-cap{
  display: block;
  margin-top: 6px;
  font-weight: 600;
  color: var(--color-text);
}
.page-about .tech-stat p{
  margin: 6px 0 0;
  font-size: .82rem;
  color: var(--color-text-secondary);
}
.page-about .tech-layout{
  display: grid;
  gap: 28px;
  margin-bottom: 40px;
}
.page-about .tech-figure{
  margin: 0;
  border: 1px solid var(--color-border);
  overflow: hidden;
  background: var(--color-bg-deep);
}
.page-about .tech-figure img{
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.page-about .tech-detail-col h3{
  margin: 0 0 12px;
  font-family: var(--font-headings);
  font-size: 1.4rem;
}
.page-about .tech-detail-col h4{
  margin: 28px 0 8px;
  font-size: 1rem;
  color: var(--color-primary);
}
.page-about .tech-detail-col p{
  margin: 0 0 12px;
  color: var(--color-text-secondary);
}
.page-about .tech-bullets{
  margin: 20px 0;
  padding: 0;
  list-style: none;
}
.page-about .tech-bullets li{
  position: relative;
  padding: 6px 0 6px 24px;
  color: var(--color-text-secondary);
  border-bottom: 1px dashed var(--color-border);
}
.page-about .tech-bullets li::before{
  content: "";
  position: absolute;
  left: 4px;
  top: 15px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--color-primary);
}
.page-about .tech-cert{
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin: 28px 0;
  padding: 18px;
  background: linear-gradient(120deg, rgba(255,107,53,.1), rgba(57,255,20,.04)), var(--color-bg-deep);
  border: 1px solid var(--color-border);
}
.page-about .cert-badge{
  flex: 0 0 auto;
  font-family: var(--font-headings);
  font-size: .95rem;
  letter-spacing: .05em;
  color: var(--color-primary);
  border: 1px solid rgba(255,107,53,.5);
  padding: 4px 8px;
  transform: skew(-6deg);
}
.page-about .cert-copy strong{
  display: block;
  margin-bottom: 4px;
}
.page-about .cert-copy p{
  margin: 0;
  font-size: .86rem;
}
.page-about .tech-actions{
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* 数据曲线 */
.page-about .curve-figure{
  margin: 48px 0 0;
  padding: 20px 16px 12px;
  border: 1px solid var(--color-border);
  background: var(--color-bg-deep);
}
.page-about .data-curve{
  display: block;
  width: 100%;
  height: auto;
  max-height: 240px;
}
.page-about .curve-figure figcaption{
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .12em;
  color: var(--color-text-secondary);
}

/* ---------- 团队与用户 ---------- */
.page-about .team-layout{
  display: grid;
  gap: 36px;
}
.page-about .team-visual{
  position: relative;
  border: 1px solid var(--color-border);
  background: var(--color-bg-deep);
  overflow: hidden;
}
.page-about .team-visual > img{
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.page-about .role-list{
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin: 0;
  padding: 14px;
  list-style: none;
  background: rgba(15,26,36,.88);
  border-top: 1px solid var(--color-border);
}
.page-about .role-item{
  border: 1px solid var(--color-border);
  background: var(--color-bg-surface);
  padding: 10px 12px;
  transition: all var(--transition);
}
.page-about .role-item:hover{
  border-color: var(--color-primary);
  background: var(--color-bg-deep);
}
.page-about .role-chip{
  display: block;
  font-weight: 700;
  font-size: .92rem;
  color: var(--color-text);
}
.page-about .role-item:hover .role-chip{
  color: var(--color-primary);
}
.page-about .role-detail{
  display: block;
  margin-top: 2px;
  font-size: .8rem;
  color: var(--color-text-secondary);
}
.page-about .team-copy h3{
  margin: 0 0 14px;
  font-family: var(--font-headings);
  font-size: 1.35rem;
}
.page-about .team-copy p{
  margin: 0 0 14px;
  color: var(--color-text-secondary);
}
.page-about .team-stats{
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin: 26px 0 24px;
}
.page-about .team-stat{
  background: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  padding: 14px 8px;
  text-align: center;
  transition: all var(--transition);
}
.page-about .team-stat:hover{
  border-color: var(--color-highlight);
  transform: translateY(-3px);
}
.page-about .team-stat strong{
  display: block;
  font-family: var(--font-headings);
  font-size: 1.5rem;
  color: var(--color-highlight);
}
.page-about .team-stat span{
  display: block;
  margin-top: 2px;
  font-size: .76rem;
  color: var(--color-text-secondary);
}

/* ---------- 荣誉认可 ---------- */
.page-about .honor-grid{
  display: grid;
  gap: 16px;
}
.page-about .honor-card{
  position: relative;
  background: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  padding: 48px 20px 24px;
  overflow: hidden;
  transition: transform var(--transition), border-color var(--transition);
}
.page-about .honor-card:hover{
  transform: translateY(-4px) rotate(-1deg);
  border-color: rgba(255,107,53,.5);
}
.page-about .honor-mark{
  position: absolute;
  top: -18px;
  right: -10px;
  font-family: var(--font-headings);
  font-size: 4.2rem;
  line-height: 1;
  color: rgba(255,107,53,.14);
  letter-spacing: -.02em;
  pointer-events: none;
}
.page-about .honor-card:hover .honor-mark{
  color: rgba(255,107,53,.3);
  transform: rotate(-4deg);
}
.page-about .honor-card h3{
  margin: 0 0 8px;
  font-family: var(--font-headings);
  font-size: 1.05rem;
  line-height: 1.4;
}
.page-about .honor-card p{
  margin: 0;
  font-size: .88rem;
  color: var(--color-text-secondary);
}

/* ---------- CTA ---------- */
.page-about .about-cta{
  max-width: var(--about-max);
  margin-inline: auto;
  padding: 72px var(--about-pad) 88px;
}
.page-about .cta-panel{
  position: relative;
  padding: 44px 28px;
  overflow: hidden;
  border: 1px solid var(--color-border);
  background: linear-gradient(135deg, rgba(255,107,53,.14), rgba(57,255,20,.04) 55%, rgba(26,42,58,.55)), var(--color-bg-deep);
}
.page-about .cta-panel::before{
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-highlight));
}
.page-about .cta-kicker{
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: .76rem;
  letter-spacing: .2em;
  color: var(--color-highlight);
}
.page-about .cta-panel h2{
  margin: 0 0 10px;
  font-family: var(--font-headings);
  font-size: clamp(1.6rem, 3vw, 2.2rem);
}
.page-about .cta-panel > p{
  margin: 0 0 24px;
  color: var(--color-text-secondary);
}
.page-about .cta-actions{
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 响应式：平板与桌面 ---------- */
@media (min-width: 768px){
  .page-about .hero-frame{
    display: grid;
    grid-template-columns: 1.35fr .85fr;
    grid-template-areas:
      "kicker year"
      "title  year"
      "lead   year"
      "stats  year";
    column-gap: 24px;
    align-items: center;
    padding-top: 64px;
    padding-bottom: 64px;
  }
  .page-about .hero-kicker{
    grid-area: kicker;
    align-self: end;
    margin-bottom: 4px;
  }
  .page-about .hero-title{
    grid-area: title;
    align-self: start;
  }
  .page-about .hero-year-ghost{
    grid-area: year;
    justify-self: end;
    align-self: center;
    margin: 0;
    font-size: clamp(9rem, 18vw, 19rem);
    color: rgba(255,107,53,.14);
  }
  .page-about .hero-lead{
    grid-area: lead;
    margin-top: 18px;
  }
  .page-about .hero-stats{
    grid-area: stats;
    grid-template-columns: repeat(4, 1fr);
    margin-top: 18px;
  }
  .page-about .hero-stats li{
    border-left: 2px solid transparent;
  }
  .page-about .hero-stats li:hover{
    border-left-color: var(--color-highlight);
  }

  .page-about .story-grid{
    grid-template-columns: 1fr 1.1fr;
    gap: 60px;
    align-items: start;
  }

  .page-about .milestone-layout{
    grid-template-columns: 1.1fr .9fr;
    gap: 48px;
    align-items: start;
  }
  .page-about .timeline-list::before{
    left: 50%;
  }
  .page-about .tl-item:nth-child(odd) .tl-card{
    grid-column: 1;
    grid-row: 1;
    justify-self: end;
    text-align: right;
  }
  .page-about .tl-item:nth-child(odd) .tl-card::before{
    left: auto;
    right: -1px;
  }
  .page-about .tl-item:nth-child(even) .tl-card{
    grid-column: 3;
    grid-row: 1;
    justify-self: start;
  }
  .page-about .tl-item:nth-child(even) .tl-card::before{
    left: -1px;
  }
  .page-about .tl-dot{
    grid-column: 2;
    justify-self: center;
    margin-top: 24px;
  }

  .page-about .tech-layout{
    grid-template-columns: 1fr 1.05fr;
    gap: 36px;
    align-items: center;
  }
  .page-about .team-layout{
    grid-template-columns: 1.05fr .95fr;
    gap: 40px;
    align-items: start;
  }
  .page-about .role-list{
    grid-template-columns: 1fr 1fr;
  }
  .page-about .honor-grid{
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 1100px){
  .page-about .about-section{
    padding-top: 88px;
  }
  .page-about .section-idx{
    position: absolute;
    left: var(--about-pad);
    top: 88px;
    flex-direction: column;
    gap: 2px;
    border-top: none;
    border-left: 2px solid var(--color-border);
    padding-left: 14px;
    margin-bottom: 0;
    writing-mode: horizontal-tb;
  }
  .page-about .section-body{
    margin-left: 64px;
  }
  .page-about .tech-stat-band{
    gap: 14px;
  }
  .page-about .honor-grid{
    grid-template-columns: repeat(4, 1fr);
  }
  .page-about .role-detail{
    display: none;
  }
  .page-about .role-item:hover .role-detail{
    display: block;
  }
  .page-about .cta-panel{
    padding: 56px 64px;
  }
}