:root{
    --brand:var(--ui-primary);
    --brand-light:var(--ui-primary-soft);
    --brand-soft:var(--ui-primary-soft);
    --ink:var(--ui-text);
    --ink-2:var(--ui-text);
    --text:var(--ui-muted);
    --text-soft:var(--ui-muted);
    --line:var(--ui-border);
    --surface:var(--ui-background);
    --white:#FFFFFF;
    --dark-a:#0A1729;
    --dark-b:#000F29;
    --radius-s:10px;
    --radius-m:12px;
    --radius-l:18px;
    --maxw:1200px;
  }
  *{box-sizing:border-box;margin:0;padding:0}
  html{scroll-behavior:smooth}
  body{
    font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
    color:var(--ink);
    background:var(--white);
    -webkit-font-smoothing:antialiased;
    line-height:1.6;
  }
  a{color:inherit;text-decoration:none}
  img{display:block;max-width:100%}
  .wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}
  .section{padding:96px 0}

  /* ---------- 导航 ---------- */
  header{
    position:sticky;top:0;z-index:60;
    background:rgba(255,255,255,.88);
    backdrop-filter:blur(14px);
    border-bottom:1px solid rgba(234,234,234,.8);
  }
  .nav{height:76px;display:flex;align-items:center;justify-content:space-between;gap:24px}
  .brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
  .brand img{width:34px;height:34px;border-radius:9px}
  .brand span{font-size:19px;font-weight:700;letter-spacing:.2px}
  .menu{display:flex;align-items:center;gap:38px}
  .menu a{
    font-size:var(--ui-font-size);color:var(--text);position:relative;padding:4px 0;
    transition:color .2s ease;
  }
  .menu a::after{
    content:"";position:absolute;left:0;bottom:-2px;height:2px;width:0;
    background:var(--brand);border-radius:2px;transition:width .25s ease;
  }
  .menu a:hover{color:var(--ink)}
  .menu a:hover::after,.menu a.active::after{width:100%}
  .menu a.active{color:var(--ink);font-weight:500}
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    font-size:16px;font-weight:500;border-radius:var(--radius-s);
    padding:15px 30px;border:1px solid transparent;cursor:pointer;
    transition:all .22s ease;white-space:nowrap;
  }
  .btn-primary{background:var(--brand);color:#fff;box-shadow:0 6px 18px rgba(1,80,178,.22)}
  .btn-primary:hover{background:#01408f;transform:translateY(-1px);box-shadow:0 10px 24px rgba(1,80,178,.28)}
  .btn-ghost{background:#fff;color:var(--ink);border-color:#D6D9DE}
  .btn-ghost:hover{border-color:var(--brand);color:var(--brand)}
  .btn-sm{padding:11px 22px;font-size:var(--ui-font-size);border-radius:8px}
  .nav-toggle{display:none;background:none;border:none;cursor:pointer;padding:8px}
  .nav-toggle span{display:block;width:22px;height:2px;background:var(--ink);border-radius:2px;margin:4px 0}

  /* ---------- 首屏 ---------- */
  .hero{
    background:var(--ui-surface);
    padding:80px 0;
    overflow:hidden;
  }
  .hero-inner{display:flex;align-items:center;gap:72px}
  .hero-copy{flex:1;min-width:0;display:flex;flex-direction:column;gap:24px}
  .pill{
    display:inline-flex;align-items:center;gap:8px;align-self:flex-start;
    padding:8px 16px;border-radius:100px;font-size:var(--ui-font-size);font-weight:500;
    color:var(--brand);background:var(--brand-light);border:1px solid #D4E1F7;
  }
  .pill i{width:6px;height:6px;border-radius:50%;background:var(--brand);flex-shrink:0}
  h1{
    font-size:52px;line-height:1.31;font-weight:700;letter-spacing:-.5px;
    color:var(--ink);
  }
  .hero-sub{font-size:17px;line-height:1.76;color:var(--text)}
  .hero-sub strong{color:var(--ink-2);font-weight:500}
  .hero-btns{display:flex;gap:14px;flex-wrap:wrap}
  .hero-stats{display:flex;align-items:center;gap:26px;flex-wrap:wrap}
  .stat{display:flex;align-items:baseline;gap:4px}
  .stat b{font-size:17px;font-weight:700;color:var(--ink)}
  .stat span{font-size:var(--ui-font-size);color:var(--text)}
  .divider{width:1px;height:18px;background:#D6D9DE}
  .hero-visual{
    width:520px;flex-shrink:0;border-radius:var(--radius-l);overflow:hidden;
    box-shadow:0 24px 60px rgba(10,22,40,.14);
    background:#fff;
  }
  .hero-visual img{width:100%;height:560px;object-fit:cover;object-position:center}

  /* ---------- 通用标题 ---------- */
  .sec-head{display:flex;flex-direction:column;align-items:center;gap:16px;text-align:center}
  .sec-tag{font-size:var(--ui-font-size);font-weight:500;color:var(--brand);letter-spacing:.5px}
  h2{font-size:40px;line-height:1.3;font-weight:700;letter-spacing:-.4px}
  .sec-sub{font-size:var(--ui-font-size);line-height:1.75;color:var(--text);max-width:720px}

  /* ---------- 痛点 ---------- */
  .pain{background:var(--surface)}
  .pain .sec-head{align-items:flex-start;text-align:left}
  .pain .sec-head p{font-size:var(--ui-font-size);line-height:1.75;color:var(--text);max-width:420px;text-align:left}
  .pain-head{display:flex;align-items:flex-end;justify-content:space-between;gap:48px}
  .pain-head .left{display:flex;flex-direction:column;gap:16px}
  .pain-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-top:56px}
  .pain-card{
    display:flex;gap:16px;align-items:flex-start;
    background:#fff;border:1px solid var(--line);border-radius:var(--radius-m);
    padding:28px;transition:all .25s ease;
  }
  .pain-card:hover{border-color:#CFDDF5;box-shadow:0 12px 30px rgba(10,22,40,.06);transform:translateY(-2px)}
  .icon-box{
    width:48px;height:48px;border-radius:var(--radius-m);flex-shrink:0;
    display:flex;align-items:center;justify-content:center;
  }
  .icon-box svg{width:24px;height:24px}
  .bg-blue{background:#EDF2FB}
  .bg-red{background:#FDEEEC}
  .bg-amber{background:#FCF3E6}
  .bg-green{background:#E9F7F2}
  .pain-card h3{font-size:20px;font-weight:700;color:var(--ink);margin-bottom:6px}
  .pain-card p{font-size:var(--ui-font-size);line-height:1.72;color:var(--text)}

  /* ---------- 核心产品 ---------- */
  .products .sec-head{margin-bottom:64px}
  .prod-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
  .prod-card{
    display:flex;flex-direction:column;gap:18px;
    background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-m);
    padding:32px;transition:all .25s ease;
  }
  .prod-card:hover{background:#fff;border-color:#CFDDF5;box-shadow:0 16px 40px rgba(10,22,40,.08);transform:translateY(-3px)}
  .shot{
    width:100%;height:200px;border-radius:var(--radius-s);overflow:hidden;
    border:1px solid #E6EAF2;background:#fff;
  }
  .shot img{width:100%;height:100%;object-fit:cover;object-position:left top}
  .prod-card h3{font-size:19px;font-weight:700;color:var(--ink);line-height:1.4}
  .prod-card p{font-size:var(--ui-font-size);line-height:1.72;color:var(--text)}

  /* ---------- 优势数据 ---------- */
  .metrics{padding-top:0}
  .metric-card{
    position:relative;overflow:hidden;border-radius:20px;
    background:var(--ui-surface);
    padding:48px 56px;
    display:flex;align-items:center;justify-content:space-between;gap:48px;
    color:var(--ui-text);
    border:1px solid var(--ui-border);
  }
  .metric-card::before{
    content:"";position:absolute;width:460px;height:460px;border-radius:50%;
    right:-90px;top:-120px;
    background:none;
    pointer-events:none;
  }
  .metric-copy{position:relative;z-index:1;max-width:520px}
  .metric-copy .kicker{font-size:var(--ui-font-size);font-weight:500;color:var(--ui-primary);letter-spacing:.5px;margin-bottom:12px;display:block}
  .metric-copy h2{font-size:36px;line-height:1.34;color:var(--ui-text);margin-bottom:12px}
  .metric-copy p{font-size:var(--ui-font-size);line-height:1.75;color:var(--ui-muted)}
  .metric-list{position:relative;z-index:1;display:flex;gap:56px}
  .metric-item{text-align:center}
  .metric-item b{display:block;font-size:44px;font-weight:700;line-height:1.1;letter-spacing:-1px}
  .metric-item span{display:block;font-size:var(--ui-font-size);color:var(--ui-muted);margin-top:8px}
  .metric-item:nth-child(1) b{color:var(--ui-primary)}
  .metric-item:nth-child(2) b{color:var(--ui-primary)}
  .metric-item:nth-child(3) b{color:var(--ui-primary)}

  /* ---------- 联系我们 ---------- */
  .contact{background:#fff;padding-top:0}
  .contact .sec-head{margin-bottom:48px}
  .contact-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;align-items:stretch}
  .contact-card{
    display:flex;flex-direction:column;gap:12px;
    background:var(--surface);border:1px solid var(--line);
    border-radius:var(--radius-m);padding:28px;transition:all .25s ease;
  }
  .contact-card:hover{border-color:#CFDDF5;box-shadow:0 12px 30px rgba(10,22,40,.06)}
  .contact-card .ico{width:22px;height:22px;color:var(--brand)}
  .contact-card .label{font-size:var(--ui-font-size);color:var(--text)}
  .contact-card .value{font-size:18px;font-weight:700;color:var(--ink);line-height:1.45}
  .contact-card .note{font-size:var(--ui-font-small);color:var(--text-soft)}
  .contact-wx{flex-direction:row;gap:20px;align-items:center}
  .contact-wx img{width:104px;height:104px;border-radius:8px;flex-shrink:0;background:#fff}
  .contact-wx .col{display:flex;flex-direction:column;gap:12px;min-width:0}

  .cta{
    margin-top:24px;border-radius:16px;background:var(--brand-light);
    padding:32px 40px;display:flex;align-items:center;justify-content:space-between;gap:32px;
  }
  .cta h3{font-size:20px;font-weight:700;color:var(--ink);margin-bottom:6px}
  .cta p{font-size:var(--ui-font-size);color:var(--text)}

  /* ---------- 页脚 ---------- */
  footer{background:var(--ui-surface);color:var(--ui-text);border-top:1px solid var(--ui-border)}
  .foot-main{display:flex;gap:64px;padding:72px 0 56px}
  .foot-brand{width:360px;flex-shrink:0;display:flex;flex-direction:column;gap:20px}
  .foot-brand .brand span{color:var(--ui-muted)}
  .foot-brand p{font-size:var(--ui-font-size);line-height:1.85;color:var(--ui-muted)}
  .foot-cols{display:grid;grid-template-columns:repeat(4,1fr);gap:32px;flex:1}
  .foot-col{display:flex;flex-direction:column;gap:16px}
  .foot-col h4{font-size:var(--ui-font-size);font-weight:700;color:var(--ui-text)}
  .foot-col a{font-size:var(--ui-font-size);color:var(--ui-muted);transition:color .2s ease}
  .foot-col a:hover{color:var(--ui-primary)}
  .foot-bottom{
    border-top:1px solid var(--ui-border);padding:26px 0;
    display:flex;align-items:center;justify-content:space-between;gap:16px;
    font-size:var(--ui-font-size);color:var(--ui-muted);flex-wrap:wrap;
  }
  .foot-bottom a:hover{color:var(--ui-primary)}

  /* ---------- 进场动画 ---------- */
  .reveal{opacity:0;transform:translateY(22px);transition:opacity .6s ease,transform .6s ease}
  .reveal.in{opacity:1;transform:none}

  /* ---------- 响应式 ---------- */
  @media (max-width:1180px){
    .hero-inner{gap:44px}
    .hero-visual{width:440px}
    .hero-visual img{height:420px}
    h1{font-size:44px}
    .prod-grid{grid-template-columns:repeat(2,1fr)}
    .metric-card{flex-direction:column;align-items:flex-start;gap:36px}
    .metric-list{gap:44px}
  }
  @media (max-width:900px){
    .nav-toggle{display:block}
    .menu{
      position:absolute;top:76px;left:0;right:0;background:#fff;
      flex-direction:column;gap:0;padding:8px 0 16px;
      border-bottom:1px solid var(--line);
      display:none;
    }
    .menu.open{display:flex}
    .menu a{width:100%;padding:14px 24px;border-bottom:1px solid #F4F4F4}
    .menu a::after{display:none}
    .hero-inner{flex-direction:column-reverse;align-items:stretch}
    .hero-visual{width:100%}
    .hero-visual img{height:360px}
    h1{font-size:34px;line-height:1.35}
    h2{font-size:28px}
    .section{padding:64px 0}
    .hero{padding:48px 0 56px}    .pain-head{flex-direction:column;align-items:flex-start;gap:16px}
    .pain .sec-head p{text-align:left}
    .pain-grid{grid-template-columns:1fr;margin-top:40px}
    .prod-grid{grid-template-columns:1fr}
    .contact-grid{grid-template-columns:1fr}
    .cta{flex-direction:column;align-items:flex-start;gap:20px;padding:28px 24px}
    .metric-card{padding:36px 28px}
    .metric-copy h2{font-size:26px}
    .metric-list{flex-wrap:wrap;gap:28px}
    .metric-item b{font-size:34px}
    .foot-main{flex-direction:column;gap:40px;padding:56px 0 40px}
    .foot-brand{width:100%}
    .foot-cols{grid-template-columns:1fr 1fr;gap:28px}
    .foot-bottom{flex-direction:column;align-items:flex-start;gap:8px}
  }