.page-about{
  --about-lead:#D6E1EB;
  --about-card:rgba(7,16,24,.62);
  --about-grid:rgba(159,179,200,.09);
  background:
    radial-gradient(1100px 520px at 88% -10%, rgba(28,110,140,.34), transparent 62%),
    radial-gradient(700px 380px at 2% 30%, rgba(53,242,196,.07), transparent 70%),
    var(--ink-night);
  color:var(--lamp);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero{
  position:relative;
  padding:clamp(22px,4vw,44px) 0 clamp(34px,6vw,72px);
  border-bottom:1px solid var(--line-soft);
}
.page-about .about-hero::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:
    linear-gradient(to right,var(--about-grid) 1px,transparent 1px),
    linear-gradient(to bottom,var(--about-grid) 1px,transparent 1px);
  background-size:64px 64px;
  -webkit-mask-image:linear-gradient(150deg,#000 8%,transparent 74%);
  mask-image:linear-gradient(150deg,#000 8%,transparent 74%);
  pointer-events:none;
}
.page-about .about-hero__inner{
  position:relative;
  display:grid;
  gap:clamp(24px,4vw,44px);
  align-items:start;
}
.page-about .crumbs__list{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  margin:0 0 18px;
  padding:0;
  list-style:none;
  font-size:13px;
  color:var(--fog);
}
.page-about .crumbs__link{
  color:var(--fog);
  text-decoration:none;
}
.page-about .crumbs__link:hover{color:var(--neon);}
.page-about .crumbs__sep{color:rgba(159,179,200,.55);}
.page-about .about-hero h1{
  margin:12px 0 0;
  font-family:var(--font-display);
  font-weight:800;
  font-size:clamp(34px,8.6vw,68px);
  line-height:1.04;
  letter-spacing:-.02em;
  color:var(--lamp);
}
.page-about .about-hero__lead{
  margin:18px 0 0;
  max-width:32em;
  font-size:clamp(16px,1.7vw,17.5px);
  line-height:1.8;
  color:var(--about-lead);
}
.page-about .about-hero__facts{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:10px;
  margin:24px 0 0;
  padding:0;
  list-style:none;
}
.page-about .about-fact{
  display:flex;
  flex-direction:column;
  gap:4px;
  padding:12px 14px;
  border:1px solid var(--line-soft);
  border-radius:var(--r-md);
  background:var(--about-card);
  font-size:13px;
  line-height:1.5;
  color:var(--fog);
}
.page-about .about-fact .num{
  font-family:var(--font-mono);
  font-size:26px;
  line-height:1;
  letter-spacing:.02em;
  color:var(--amber);
}
.page-about .about-hero__actions{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-top:26px;
}
.page-about .about-hero__media{
  margin:0;
  border-radius:var(--r-xl);
  overflow:hidden;
  box-shadow:var(--shadow-deep);
  transform:rotate(-1.4deg);
}
.page-about .about-hero__media .media-frame__el{
  display:block;
  width:100%;
  height:auto;
  object-fit:cover;
}
.page-about .about-hero__media .media-frame__cap{
  font-size:12.5px;
  font-style:italic;
  color:var(--fog);
}

/* ---------- 主体骨架 ---------- */
.page-about .about-body{
  display:grid;
  gap:clamp(28px,4vw,44px);
  padding:clamp(34px,5vw,68px) 0 clamp(48px,8vw,96px);
}

/* ---------- 左侧赛季节点 ---------- */
.page-about .about-aside__label{
  margin:0 0 12px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.16em;
  color:var(--neon);
}
.page-about .about-axis{
  display:flex;
  gap:10px;
  margin:0;
  padding:0 0 8px;
  list-style:none;
  overflow-x:auto;
  scrollbar-width:thin;
}
.page-about .about-axis__node{
  display:flex;
  flex-direction:column;
  gap:4px;
  min-width:148px;
  padding:10px 14px;
  border:1px solid var(--line);
  border-radius:var(--r-md);
  background:var(--about-card);
  text-decoration:none;
  transition:border-color var(--dur),transform var(--dur);
}
.page-about .about-axis__node:hover,
.page-about .about-axis__node:focus-visible{
  border-color:var(--line-neon);
  transform:translateY(-2px);
}
.page-about .about-axis__year{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  color:var(--amber);
}
.page-about .about-axis__text{
  font-size:13px;
  line-height:1.4;
  color:var(--fog);
}
.page-about .about-chapters{
  display:flex;
  flex-wrap:wrap;
  gap:6px;
  margin-top:16px;
  padding-top:16px;
  border-top:1px solid var(--line-soft);
}
.page-about .spy-link{
  padding:6px 12px;
  border:1px solid transparent;
  border-radius:var(--r-pill);
  font-size:13px;
  color:var(--fog);
  text-decoration:none;
  transition:color var(--dur),background var(--dur);
}
.page-about .spy-link:hover{color:var(--lamp);}
.page-about .spy-link.is-active{
  color:var(--ink-night);
  background:var(--neon);
  border-color:var(--neon);
  font-weight:600;
}

/* ---------- 章节通用 ---------- */
.page-about .about-section{
  padding:clamp(26px,4vw,40px) 0;
  border-top:1px solid var(--line-soft);
}
.page-about .about-section:first-child{
  padding-top:0;
  border-top:0;
}
.page-about .about-section h2{
  margin:10px 0 18px;
  font-family:var(--font-display);
  font-weight:800;
  font-size:clamp(26px,4.6vw,42px);
  line-height:1.1;
  letter-spacing:-.015em;
  color:var(--lamp);
}
.page-about .about-section p{
  margin:0 0 1em;
  max-width:36em;
  font-size:clamp(16px,1.6vw,17px);
  line-height:1.8;
  color:var(--about-lead);
}
.page-about .about-section a{
  color:var(--neon);
  text-decoration:underline;
  text-underline-offset:3px;
}
.page-about .about-section a:hover{color:var(--amber);}

.page-about .about-callout{
  margin-top:22px;
  padding:16px 18px;
  border-left:3px solid var(--amber);
  border-radius:0 var(--r-md) var(--r-md) 0;
  background:rgba(255,180,58,.08);
  font-size:15px;
  line-height:1.75;
  color:var(--lamp);
}

/* ---------- 五条内容线 ---------- */
.page-about .line-list{
  display:grid;
  gap:10px;
  margin:24px 0 0;
  padding:0;
  list-style:none;
}
.page-about .line-row{
  padding:14px 16px;
  border:1px solid var(--line-soft);
  border-radius:var(--r-lg);
  background:linear-gradient(118deg,rgba(28,110,140,.2),rgba(7,16,24,.55) 62%);
  transition:border-color var(--dur);
}
.page-about .line-row:hover{border-color:var(--line-neon);}
.page-about .line-row__head{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px;
}
.page-about .line-row__idx{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.1em;
  color:var(--amber);
}
.page-about .line-row__title{
  margin:0;
  font-size:16px;
  font-weight:700;
  color:var(--lamp);
}
.page-about .line-row__head .pill{margin-left:auto;}
.page-about .line-row__desc{
  margin:8px 0 0;
  font-size:14.5px;
  line-height:1.75;
  color:var(--fog);
}

.page-about .about-offset{
  display:grid;
  gap:18px;
  margin-top:26px;
}
.page-about .about-offset__media{
  margin:0;
  border-radius:var(--r-lg);
  overflow:hidden;
}
.page-about .about-offset__media .media-frame__el,
.page-about .about-cityband .media-frame__el{
  display:block;
  width:100%;
  height:auto;
  object-fit:cover;
}
.page-about .about-offset__text h3{
  margin:0 0 8px;
  font-family:var(--font-display);
  font-size:22px;
  font-weight:800;
  color:var(--lamp);
}
.page-about .about-offset__text p{
  margin:0;
  font-size:15.5px;
  color:var(--fog);
}

/* ---------- 团队 ---------- */
.page-about .team-stats{
  display:grid;
  gap:10px;
  margin:24px 0 0;
  padding:0;
  list-style:none;
}
.page-about .team-stat{
  display:grid;
  gap:4px;
  padding:16px 18px;
  border:1px solid var(--line-soft);
  border-radius:var(--r-lg);
  background:var(--about-card);
}
.page-about .team-stat__num{
  font-family:var(--font-mono);
  font-size:34px;
  line-height:1;
  color:var(--amber);
}
.page-about .team-stat__label{
  font-size:15px;
  font-weight:700;
  color:var(--lamp);
}
.page-about .team-stat__note{
  font-size:13.5px;
  line-height:1.6;
  color:var(--fog);
}

.page-about .rhythm{
  margin:22px 0 0;
  border:1px solid var(--line-soft);
  border-radius:var(--r-lg);
  background:rgba(7,16,24,.7);
  overflow:hidden;
}
.page-about .rhythm__row{
  display:grid;
  gap:2px;
  padding:12px 16px;
  border-top:1px solid var(--line-soft);
}
.page-about .rhythm__row:first-child{border-top:0;}
.page-about .rhythm__k{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--neon);
}
.page-about .rhythm__v{
  font-size:14.5px;
  line-height:1.6;
  color:var(--lamp);
}

.page-about .about-cityband{
  margin:24px 0 0;
  border-radius:var(--r-xl);
  overflow:hidden;
  box-shadow:var(--shadow-deep);
}

/* ---------- 合作 ---------- */
.page-about .partner-grid{
  display:grid;
  gap:10px;
  margin-top:24px;
}
.page-about .partner-card{
  padding:18px;
  border:1px solid var(--line-soft);
  border-radius:var(--r-lg);
  background:linear-gradient(160deg,rgba(53,242,196,.09),rgba(7,16,24,.6) 70%);
}
.page-about .partner-card__num{
  font-family:var(--font-mono);
  font-size:30px;
  line-height:1;
  color:var(--amber);
}
.page-about .partner-card__title{
  margin:10px 0 6px;
  font-size:16px;
  font-weight:700;
  color:var(--lamp);
}
.page-about .partner-card p{
  margin:0;
  font-size:14.5px;
  line-height:1.7;
  color:var(--fog);
}

.page-about .honors{
  margin-top:20px;
  padding:18px;
  border-radius:var(--r-lg);
  background:var(--paper);
  color:var(--ink-cabin);
}
.page-about .honors__title{
  margin:0 0 10px;
  font-family:var(--font-display);
  font-size:20px;
  font-weight:800;
  color:var(--ink-cabin);
}
.page-about .honors__list{
  display:grid;
  gap:8px;
  margin:0 0 12px;
  padding:0;
  list-style:none;
}
.page-about .honors__list li{
  position:relative;
  padding-left:18px;
  font-size:15px;
  line-height:1.6;
  color:#1B2A38;
}
.page-about .honors__list li::before{
  content:"";
  position:absolute;
  left:0;
  top:9px;
  width:9px;
  height:9px;
  border-radius:2px;
  background:var(--teal);
  transform:skewX(-12deg);
}
.page-about .honors__note{
  margin:0;
  font-size:14px;
  line-height:1.7;
  color:#33465A;
}
.page-about .honors__note a{color:#0E5A72;}

/* ---------- 里程碑 ---------- */
.page-about .milestones{
  position:relative;
  display:grid;
  gap:14px;
  margin:24px 0 0;
  padding:0 0 0 20px;
  list-style:none;
}
.page-about .milestones::before{
  content:"";
  position:absolute;
  left:4px;
  top:8px;
  bottom:8px;
  width:2px;
  border-radius:2px;
  background:linear-gradient(180deg,var(--neon),var(--teal) 52%,rgba(255,180,58,.75));
}
.page-about .milestone{
  position:relative;
  display:grid;
  gap:6px;
}
.page-about .milestone::before{
  content:"";
  position:absolute;
  left:-20px;
  top:9px;
  width:10px;
  height:10px;
  border-radius:50%;
  border:2px solid var(--teal);
  background:var(--ink-night);
}
.page-about .milestone:target::before{
  border-color:var(--neon);
  background:var(--neon);
}
.page-about .milestone__year{
  display:inline-block;
  align-self:start;
  padding:2px 10px;
  border-radius:var(--r-pill);
  background:rgba(53,242,196,.14);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--neon);
}
.page-about .milestone__body h3{
  margin:0 0 4px;
  font-size:16.5px;
  font-weight:700;
  color:var(--lamp);
}
.page-about .milestone__body p{
  margin:0;
  font-size:14.5px;
  line-height:1.7;
  color:var(--fog);
}

/* ---------- 服务承诺 ---------- */
.page-about .promise-list{
  margin:24px 0 0;
  border:1px solid var(--line-soft);
  border-radius:var(--r-lg);
  overflow:hidden;
  background:rgba(7,16,24,.66);
}
.page-about .promise-list__row{
  display:grid;
  gap:4px;
  padding:14px 16px;
  border-top:1px solid var(--line-soft);
}
.page-about .promise-list__row:first-child{border-top:0;}
.page-about .promise-list dt{
  font-size:13px;
  font-weight:700;
  letter-spacing:.04em;
  color:var(--amber);
}
.page-about .promise-list dd{
  margin:0;
  font-size:14.5px;
  line-height:1.7;
  color:var(--lamp);
}

.page-about .about-contact{
  display:grid;
  gap:10px;
  margin-top:18px;
}
.page-about .about-contact__row{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px 12px;
  padding:12px 14px;
  border:1px dashed var(--line);
  border-radius:var(--r-md);
}
.page-about .about-contact__label{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.12em;
  color:var(--fog);
  min-width:64px;
}
.page-about .about-contact__value{
  flex:1 1 200px;
  font-size:14.5px;
  line-height:1.6;
  color:var(--lamp);
  word-break:break-word;
}

.page-about .about-actions{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-top:24px;
}

/* ---------- 中等屏幕 ---------- */
@media (min-width:700px){
  .page-about .about-hero__facts{grid-template-columns:repeat(4,minmax(0,1fr));}
  .page-about .line-list{grid-template-columns:repeat(2,minmax(0,1fr));}
  .page-about .line-row:nth-child(1){grid-column:1 / -1;}
  .page-about .team-stats{grid-template-columns:repeat(3,minmax(0,1fr));}
  .page-about .partner-grid{grid-template-columns:repeat(3,minmax(0,1fr));}
  .page-about .rhythm__row{grid-template-columns:150px minmax(0,1fr);align-items:baseline;gap:12px;}
  .page-about .promise-list__row{grid-template-columns:150px minmax(0,1fr);align-items:baseline;gap:12px;}
  .page-about .about-offset{grid-template-columns:minmax(0,1fr) minmax(0,1fr);align-items:center;}
  .page-about .about-offset__media{transform:rotate(1.2deg);}
  .page-about .milestone{grid-template-columns:96px minmax(0,1fr);gap:14px;align-items:start;}
}

/* ---------- 桌面：左窄右宽，年份轴粘性跟随 ---------- */
@media (min-width:960px){
  .page-about .about-hero__inner{
    grid-template-columns:1.02fr .98fr;
    align-items:center;
  }
  .page-about .about-body{
    grid-template-columns:246px minmax(0,1fr);
    gap:clamp(32px,4vw,64px);
    align-items:start;
  }
  .page-about .about-aside__inner{
    position:sticky;
    top:96px;
  }
  .page-about .about-axis{
    flex-direction:column;
    gap:2px;
    padding:0 0 0 18px;
    overflow:visible;
    position:relative;
  }
  .page-about .about-axis::before{
    content:"";
    position:absolute;
    left:4px;
    top:6px;
    bottom:6px;
    width:2px;
    border-radius:2px;
    background:linear-gradient(180deg,var(--neon),var(--teal) 58%,rgba(255,180,58,.65));
  }
  .page-about .about-axis__node{
    flex-direction:row;
    align-items:baseline;
    gap:8px;
    min-width:0;
    padding:6px 0;
    border:0;
    background:transparent;
    position:relative;
  }
  .page-about .about-axis__node:hover{transform:translateX(2px);}
  .page-about .about-axis__node::before{
    content:"";
    position:absolute;
    left:-18px;
    top:50%;
    width:10px;
    height:10px;
    transform:translateY(-50%);
    border-radius:50%;
    border:2px solid var(--teal);
    background:var(--ink-night);
    transition:background var(--dur),border-color var(--dur);
  }
  .page-about .about-axis__node:hover::before,
  .page-about .about-axis__node:focus-visible::before{
    border-color:var(--neon);
    background:var(--neon);
  }
  .page-about .about-axis__year{font-size:11px;}
  .page-about .about-axis__text{font-size:12.5px;}
  .page-about .milestones{padding-left:26px;}
  .page-about .milestone::before{left:-26px;}
}

@media (prefers-reduced-motion:reduce){
  .page-about .about-hero__media,
  .page-about .about-offset__media{transform:none;}
  .page-about .about-axis__node,
  .page-about .spy-link{transition:none;}
}