/* ========== 页面作用域：.page-about ========== */
.page-about{
  --about-neon:var(--c-neon);
  --about-orange:var(--c-orange);
  --about-gold:var(--c-gold);
  --about-panel:rgba(18,30,51,.72);
  --about-border:var(--c-border);
  --about-border-soft:var(--c-border-steel);
  --about-glow:rgba(57,255,20,.06);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero{
  position:relative;
  padding:20px 0 36px;
  overflow:hidden;
}
.page-about .about-hero::before{
  content:"";
  position:absolute;
  top:-120px;
  right:-100px;
  width:320px;
  height:320px;
  background:radial-gradient(circle,var(--about-glow) 0%,transparent 70%);
  pointer-events:none;
}
.page-about .about-hero::after{
  content:"";
  position:absolute;
  inset-inline:0;
  bottom:0;
  height:1px;
  background:linear-gradient(90deg,transparent,var(--c-neon) 50%,transparent);
  opacity:.35;
  pointer-events:none;
}

.page-about .about-breadcrumb{
  display:flex;
  align-items:center;
  gap:8px;
  font-family:var(--f-mono);
  font-size:.72rem;
  letter-spacing:.12em;
  color:var(--c-muted);
  padding-bottom:14px;
  margin-bottom:28px;
  border-bottom:1px solid var(--c-border-steel);
  position:relative;
  z-index:1;
}
.page-about .about-bc-link{
  color:var(--c-muted);
  text-decoration:none;
  transition:color .3s var(--tick);
}
.page-about .about-bc-link:hover{
  color:var(--c-neon);
}
.page-about .about-bc-current{
  color:var(--c-text);
}

.page-about .about-hero-shell{
  display:grid;
  gap:24px;
  position:relative;
  z-index:1;
}

.page-about .about-hero-copy .index-label{
  margin-bottom:14px;
}
.page-about .about-hero-copy{
  position:relative;
}
.page-about .about-hero-copy::after{
  content:"";
  display:block;
  width:60px;
  height:4px;
  margin-top:0;
  background:linear-gradient(90deg,var(--c-neon),transparent);
  clip-path:polygon(0 0,100% 0,85% 100%,0 100%);
}
.page-about .about-hero-copy h1{
  font-family:var(--f-head);
  font-size:clamp(1.5rem,4.2vw,2.4rem);
  line-height:1.25;
  letter-spacing:.01em;
  color:var(--c-text);
  margin:0 0 16px;
  max-width:13em;
}
.page-about .about-hero-lead{
  color:var(--c-muted);
  font-size:clamp(.92rem,1.6vw,1.05rem);
  line-height:1.8;
  margin:0 0 20px;
  max-width:38em;
}

.page-about .about-hero-meta{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:10px;
  margin:0;
  padding:14px;
  background:var(--c-bg-panel);
  border:1px solid var(--c-border);
  border-radius:var(--radius);
}
.page-about .about-meta-item{
  padding:10px 12px;
  background:rgba(10,20,40,.55);
  border-left:2px solid var(--c-neon);
}
.page-about .about-meta-item dt{
  font-size:.7rem;
  color:var(--c-muted);
  letter-spacing:.06em;
  margin-bottom:4px;
  font-family:var(--f-mono);
}
.page-about .about-meta-item dd{
  margin:0;
  font-size:1.1rem;
  color:var(--c-text);
  font-family:var(--f-mono);
  font-weight:700;
  letter-spacing:.02em;
}

.page-about .about-hero-panel{
  background:var(--about-panel);
  backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
  border:1px solid var(--c-border);
  border-radius:var(--radius);
  box-shadow:var(--shadow-card);
  overflow:hidden;
  display:flex;
  flex-direction:column;
  position:relative;
}
.page-about .about-hero-panel::after{
  content:"";
  position:absolute;
  top:-1px;
  right:-1px;
  width:28px;
  height:28px;
  border-top:2px solid var(--c-neon);
  border-right:2px solid var(--c-neon);
  opacity:.7;
  pointer-events:none;
}
.page-about .about-panel-head{
  display:flex;
  align-items:center;
  gap:8px;
  padding:12px 14px;
  background:var(--c-bg-panel);
  border-bottom:1px solid var(--c-border);
  font-size:.8rem;
  color:var(--c-text);
}
.page-about .about-panel-sys{
  margin-left:auto;
  font-size:.66rem;
  color:var(--c-neon);
  letter-spacing:.08em;
}
.page-about .about-panel-list{
  margin:0;
  padding:4px 14px;
}
.page-about .about-panel-row{
  display:flex;
  justify-content:space-between;
  align-items:center;
  padding:10px 0;
  border-bottom:1px dashed var(--c-border-soft);
  font-size:.84rem;
}
.page-about .about-panel-row:last-child{
  border-bottom:none;
}
.page-about .about-panel-row dt{
  color:var(--c-muted);
  letter-spacing:.04em;
}
.page-about .about-panel-row dd{
  margin:0;
  color:var(--c-text);
  font-family:var(--f-mono);
  font-size:.82rem;
}
.page-about .about-panel-foot{
  display:flex;
  align-items:center;
  gap:8px;
  padding:10px 14px;
  background:rgba(10,20,40,.4);
  border-top:1px solid var(--c-border);
  font-size:.74rem;
  color:var(--c-muted);
}

/* ---------- 布局：目录索引 + 内容 ---------- */
.page-about .about-layout{
  display:grid;
  grid-template-columns:1fr;
  gap:0;
  padding-top:0;
  padding-bottom:64px;
}

.page-about .about-index{
  margin-bottom:28px;
  border-bottom:1px solid var(--c-border);
  padding-bottom:16px;
}
.page-about .about-index-title{
  font-family:var(--f-mono);
  font-size:.66rem;
  letter-spacing:.18em;
  color:var(--c-neon);
  margin:0 0 10px;
  text-transform:uppercase;
}
.page-about .about-index-list{
  display:flex;
  gap:8px;
  overflow-x:auto;
  list-style:none;
  margin:0;
  padding:0 0 4px;
  scrollbar-width:thin;
}
.page-about .about-index-item{
  flex:0 0 auto;
  display:flex;
  align-items:center;
  gap:6px;
  padding:7px 14px;
  background:var(--c-bg-panel);
  border:1px solid var(--c-border);
  border-radius:999px;
  font-size:.8rem;
}
.page-about .about-index-num{
  font-family:var(--f-mono);
  color:var(--c-neon);
  font-size:.7rem;
  letter-spacing:.06em;
}
.page-about .about-index-item a{
  color:var(--c-text);
  text-decoration:none;
  white-space:nowrap;
  transition:color .3s var(--tick);
}
.page-about .about-index-item a:hover{
  color:var(--c-neon);
}
.page-about .about-index-foot{
  margin-top:12px;
}
.page-about .about-index-foot .btn{
  width:100%;
  justify-content:center;
}

/* ---------- 章节通用 ---------- */
.page-about .about-section{
  padding:36px 0;
  border-bottom:1px solid var(--c-border);
}
.page-about .about-section:last-child{
  border-bottom:none;
}
.page-about .about-section-head{
  margin-bottom:24px;
  position:relative;
  padding-left:0;
}
.page-about .about-section-head .index-label{
  margin-bottom:10px;
}
.page-about .about-section-head h2{
  font-family:var(--f-head);
  font-size:clamp(1.2rem,2.4vw,1.6rem);
  color:var(--c-text);
  margin:0;
  line-height:1.35;
  letter-spacing:.01em;
}
.page-about .about-section-grid{
  display:grid;
  gap:24px;
  align-items:center;
}
.page-about .about-section-copy p{
  color:var(--c-muted);
  font-size:.92rem;
  line-height:1.8;
  margin:0 0 14px;
}
.page-about .about-section-copy p:last-child{
  margin-bottom:0;
}

/* ---------- 图文 ---------- */
.page-about .about-figure{
  margin:0;
  position:relative;
}
.page-about .about-figure-img{
  display:block;
  width:100%;
  max-width:100%;
  height:auto;
  border-radius:var(--radius);
  border:1px solid var(--c-border);
  box-shadow:var(--shadow-card);
}
.page-about .about-figure-cap{
  font-family:var(--f-mono);
  font-size:.7rem;
  letter-spacing:.08em;
  color:var(--c-muted);
  padding:10px 2px 10px 0;
  border-bottom:1px solid var(--c-border-soft);
}

/* ---------- 01 为什么做多联赛赛程归档 ---------- */
.page-about .about-why-list{
  list-style:none;
  margin:20px 0 0;
  padding:0;
  display:grid;
  gap:10px;
}
.page-about .about-why-list li{
  position:relative;
  padding-left:22px;
  color:var(--c-text);
  font-size:.88rem;
  line-height:1.6;
}
.page-about .about-why-dot{
  position:absolute;
  left:0;
  top:.62em;
  width:7px;
  height:7px;
  background:var(--c-neon);
  transform:rotate(45deg);
}

/* ---------- 02 功能演进 ---------- */
.page-about .about-evolve-arrow{
  display:flex;
  align-items:center;
  gap:10px;
  margin-top:24px;
  padding:14px;
  background:var(--c-bg-panel);
  border:1px solid var(--c-border);
  border-radius:var(--radius);
}
.page-about .about-evolve-step{
  font-size:.74rem;
  color:var(--c-text);
  padding:4px 10px;
  background:var(--c-bg);
  border:1px solid var(--c-border);
  border-radius:2px;
  white-space:nowrap;
  letter-spacing:.04em;
}
.page-about .about-evolve-step:last-child{
  border-color:var(--c-neon);
  color:var(--c-neon);
}
.page-about .about-evolve-line{
  flex:1;
  height:1px;
  background:linear-gradient(90deg,var(--c-border),var(--c-neon));
  position:relative;
}
.page-about .about-evolve-line::after{
  content:"";
  position:absolute;
  right:0;
  top:-2px;
  width:5px;
  height:5px;
  background:var(--c-neon);
  transform:rotate(45deg);
}

.page-about .about-evolve-console{
  position:relative;
}
.page-about .about-evolve-window{
  background:var(--c-bg-panel);
  border:1px solid var(--c-border);
  border-radius:var(--radius);
  overflow:hidden;
  box-shadow:var(--shadow-card);
}
.page-about .about-evolve-bar{
  display:flex;
  align-items:center;
  gap:6px;
  padding:10px 14px;
  background:rgba(10,20,40,.6);
  border-bottom:1px solid var(--c-border);
}
.page-about .about-evolve-light{
  width:8px;
  height:8px;
  border-radius:50%;
  background:var(--c-border);
}
.page-about .about-evolve-light:first-child{
  background:var(--c-orange);
}
.page-about .about-evolve-light:nth-child(2){
  background:var(--c-gold);
}
.page-about .about-evolve-light:nth-child(3){
  background:var(--c-neon);
}
.page-about .about-evolve-title{
  margin-left:auto;
  font-size:.64rem;
  color:var(--c-muted);
  letter-spacing:.1em;
}
.page-about .about-evolve-screen{
  display:grid;
  grid-template-columns:1fr;
  gap:12px;
  padding:14px;
}
.page-about .about-evolve-card{
  background:var(--c-bg);
  border:1px solid var(--c-border);
  border-left:2px solid var(--c-neon);
  border-radius:var(--radius);
  padding:14px;
}
.page-about .about-evolve-league{
  font-family:var(--f-mono);
  font-size:.66rem;
  color:var(--c-muted);
  letter-spacing:.08em;
  margin:0 0 6px;
}
.page-about .about-evolve-live{
  display:flex;
  align-items:center;
  gap:6px;
  font-size:.7rem;
  color:var(--c-neon);
  margin:0 0 8px;
  font-family:var(--f-mono);
  letter-spacing:.06em;
}
.page-about .about-evolve-score{
  font-family:var(--f-mono);
  font-size:1.6rem;
  font-weight:700;
  color:var(--c-text);
  margin:0 0 6px;
  letter-spacing:.04em;
  font-variant-numeric:tabular-nums;
}
.page-about .about-evolve-teams{
  font-size:.8rem;
  color:var(--c-muted);
  margin:0;
  letter-spacing:.03em;
}
.page-about .about-evolve-note{
  padding:8px 14px;
  background:rgba(10,20,40,.4);
  border-top:1px solid var(--c-border);
  font-family:var(--f-mono);
  font-size:.66rem;
  color:var(--c-muted);
  letter-spacing:.08em;
}

/* ---------- 03 数据可信度 ---------- */
.page-about .about-data-tags{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  margin:20px 0 14px;
}
.page-about .about-data-trust{
  display:flex;
  align-items:flex-start;
  gap:10px;
  font-size:.82rem;
  color:var(--c-muted);
  padding:12px 14px;
  background:rgba(10,20,40,.5);
  border-left:2px solid var(--c-orange);
  margin:0;
  line-height:1.65;
}
.page-about .about-data-trust .status-dot{
  margin-top:6px;
  flex:0 0 auto;
}

/* ---------- 04 品牌承诺 ---------- */
.page-about .about-commit-intro{
  display:grid;
  gap:24px;
}
.page-about .about-commit-intro > p{
  color:var(--c-muted);
  line-height:1.8;
  font-size:.92rem;
  margin:0;
  max-width:42em;
}
.page-about .about-commit-cards{
  display:grid;
  gap:12px;
}
.page-about .about-commit-card{
  padding:14px 16px;
  background:var(--c-bg-panel);
  border:1px solid var(--c-border);
  border-radius:var(--radius);
  transition:border-color .3s var(--tick),transform .3s var(--tick);
}
.page-about .about-commit-card:hover{
  border-color:var(--c-neon);
  transform:translateY(-2px);
}
.page-about .about-commit-card-num{
  font-family:var(--f-mono);
  font-size:.7rem;
  color:var(--c-neon);
  letter-spacing:.1em;
  display:block;
  margin-bottom:6px;
}
.page-about .about-commit-card h3{
  font-family:var(--f-head);
  font-size:.98rem;
  color:var(--c-text);
  margin:0 0 6px;
}
.page-about .about-commit-card p{
  font-size:.82rem;
  color:var(--c-muted);
  line-height:1.65;
  margin:0;
}

.page-about .about-figure--commit{
  margin:32px 0 0;
}
.page-about .about-figure--commit .about-figure-img{
  max-height:420px;
  object-fit:cover;
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline-wrap{
  margin-top:48px;
  padding-top:32px;
  border-top:1px solid var(--c-border);
}
.page-about .about-timeline-title{
  font-family:var(--f-head);
  font-size:1.05rem;
  color:var(--c-text);
  margin:0 0 16px;
}
.page-about .about-timeline{
  background:var(--c-bg-panel);
  border:1px solid var(--c-border);
  border-radius:var(--radius);
  overflow:hidden;
}
.page-about .about-timeline-summary{
  display:flex;
  align-items:center;
  gap:10px;
  padding:14px 16px;
  cursor:pointer;
  list-style:none;
  font-size:.86rem;
  color:var(--c-text);
  border-bottom:1px solid var(--c-border);
  user-select:none;
  transition:background .3s var(--tick);
}
.page-about .about-timeline-summary::-webkit-details-marker{
  display:none;
}
.page-about .about-timeline-summary:hover{
  background:rgba(10,20,40,.4);
}
.page-about .about-timeline-toggle{
  font-family:var(--f-mono);
  font-size:.68rem;
  letter-spacing:.08em;
  color:var(--c-neon);
}
.page-about .about-timeline-toggle::before{
  content:"［收起］";
}
.page-about .about-timeline:not([open]) .about-timeline-toggle::before{
  content:"［展开］";
}
.page-about .about-timeline:not([open]) .about-timeline-summary{
  border-bottom:none;
}
.page-about .about-timeline-list{
  list-style:none;
  margin:0;
  padding:0;
  position:relative;
}
.page-about .about-timeline-list::before{
  content:"";
  position:absolute;
  left:26px;
  top:14px;
  bottom:14px;
  width:1px;
  background:linear-gradient(180deg,var(--c-neon),var(--c-border) 80%);
  opacity:.5;
}
.page-about .about-timeline-item{
  display:grid;
  grid-template-columns:52px minmax(0,1fr);
  gap:14px;
  padding:16px;
  position:relative;
}
.page-about .about-timeline-item:not(:last-child){
  border-bottom:1px dashed var(--c-border-soft);
}
.page-about .about-timeline-num{
  font-family:var(--f-mono);
  font-size:.7rem;
  color:var(--c-neon);
  background:var(--c-bg);
  border:1px solid var(--c-border);
  border-radius:2px;
  text-align:center;
  padding:4px 0;
  align-self:start;
  letter-spacing:.06em;
}
.page-about .about-timeline-body h4{
  font-family:var(--f-head);
  font-size:.94rem;
  color:var(--c-text);
  margin:0 0 6px;
  line-height:1.4;
}
.page-about .about-timeline-body p{
  font-size:.82rem;
  color:var(--c-muted);
  line-height:1.65;
  margin:0;
}

/* ---------- 用户承诺 ---------- */
.page-about .about-promise{
  margin-top:48px;
  padding:24px 20px;
  background:linear-gradient(135deg,rgba(10,20,40,.6),rgba(27,42,74,.35));
  border:1px solid var(--c-border);
  border-radius:var(--radius);
  position:relative;
}
.page-about .about-promise::before{
  content:"";
  position:absolute;
  top:0;
  left:0;
  width:88px;
  height:3px;
  background:linear-gradient(90deg,var(--c-neon),transparent);
}
.page-about .about-promise-head{
  margin-bottom:20px;
}
.page-about .about-promise-head .index-label{
  margin-bottom:10px;
}
.page-about .about-promise-head h3{
  font-family:var(--f-head);
  font-size:1.15rem;
  color:var(--c-text);
  margin:0;
  line-height:1.35;
}
.page-about .about-promise-grid{
  display:grid;
  gap:12px;
}
.page-about .about-promise-card{
  padding:16px;
  background:rgba(18,30,51,.6);
  border:1px solid var(--c-border);
  border-radius:var(--radius);
  border-top:2px solid var(--c-orange);
}
.page-about .about-promise-num{
  font-family:var(--f-mono);
  font-size:.78rem;
  color:var(--c-orange);
  letter-spacing:.1em;
  display:block;
  margin-bottom:8px;
}
.page-about .about-promise-card h4{
  font-family:var(--f-head);
  font-size:.94rem;
  color:var(--c-text);
  margin:0 0 8px;
  line-height:1.4;
}
.page-about .about-promise-card p{
  font-size:.84rem;
  color:var(--c-muted);
  line-height:1.7;
  margin:0;
}
.page-about .about-promise-links{
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  margin-top:24px;
}

/* ---------- 响应式：平板与桌面 ---------- */
@media(min-width:600px){
  .page-about .about-evolve-screen{
    grid-template-columns:1fr 1fr;
  }
  .page-about .about-commit-cards{
    grid-template-columns:repeat(3,1fr);
  }
  .page-about .about-promise{
    padding:28px;
  }
  .page-about .about-promise-grid{
    grid-template-columns:repeat(3,1fr);
  }
}

@media(min-width:900px){
  .page-about .about-hero{
    padding:32px 0 56px;
  }
  .page-about .about-hero-shell{
    grid-template-columns:minmax(0,1.2fr) minmax(0,.8fr);
    gap:48px;
    align-items:stretch;
  }
  .page-about .about-hero-meta{
    grid-template-columns:repeat(4,1fr);
    padding:16px;
  }
  .page-about .about-meta-item dd{
    font-size:1.2rem;
  }

  .page-about .about-layout{
    grid-template-columns:220px minmax(0,1fr);
    gap:48px;
    align-items:start;
    padding-bottom:88px;
  }
  .page-about .about-index{
    position:sticky;
    top:120px;
    align-self:start;
    border-bottom:none;
    border-right:1px solid var(--c-border);
    margin-bottom:0;
    padding-bottom:0;
    padding-right:24px;
  }
  .page-about .about-index-list{
    flex-direction:column;
    gap:0;
    overflow:visible;
  }
  .page-about .about-index-item{
    display:flex;
    align-items:center;
    gap:10px;
    padding:12px 0;
    background:transparent;
    border:none;
    border-radius:0;
    border-bottom:1px dashed var(--c-border-soft);
  }
  .page-about .about-index-item a{
    white-space:normal;
    font-size:.84rem;
    line-height:1.4;
  }
  .page-about .about-index-item:first-child{
    padding-top:0;
  }
  .page-about .about-index-foot{
    margin-top:16px;
  }

  .page-about .about-section{
    padding:52px 0;
  }
  .page-about .about-section-head{
    margin-bottom:32px;
  }
  .page-about .about-section-grid{
    grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);
    gap:44px;
  }
  .page-about .about-section-grid--reverse{
    grid-template-columns:minmax(0,.85fr) minmax(0,1.15fr);
  }
  .page-about .about-section-grid--reverse > :first-child{
    order:2;
  }

  .page-about .about-commit-intro{
    grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);
    gap:44px;
    align-items:start;
  }
  .page-about .about-commit-intro > p{
    margin:0;
  }
  .page-about .about-figure--commit{
    margin:40px 0 0;
  }
}

.page-about {
  --c-border-soft: var(--c-border-steel);
}