:root{
  --brand:#0052D9; --brand-dark:#003EB3; --brand-soft:#EBF2FF;
  --ink:#1D2129; --ink-2:#4E5969; --ink-3:#86909C;
  --bg-soft:#F7F8FA; --line:#E5E6EB; --white:#fff;
  --dark:#0B0D11; --dark-2:#0B193A;
  --radius:16px; --radius-sm:10px;
  --shadow:0 2px 8px rgba(29,33,41,.05);
  --shadow-lg:0 16px 40px rgba(11,13,17,.10);
  --max:1200px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:'Noto Sans SC',system-ui,-apple-system,'PingFang SC','Helvetica Neue','Microsoft YaHei',sans-serif;
  color:var(--ink); background:var(--white); line-height:1.7;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer;border:none;background:none}
.wrap{max-width:var(--max);margin:0 auto;padding:0 24px}

/* ---------- Header ---------- */
.hdr{position:sticky;top:0;z-index:80;background:rgba(255,255,255,.92);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.hdr-in{display:flex;align-items:center;justify-content:space-between;height:72px;gap:24px}
.logo{display:flex;align-items:center;gap:10px;flex-shrink:0}
.logo img{height:38px;width:auto;object-fit:contain}
.nav{display:flex;align-items:center;gap:4px}
.nav a{padding:8px 14px;border-radius:8px;font-size:15px;color:var(--ink-2);transition:.18s}
.nav a:hover{color:var(--brand);background:var(--brand-soft)}
.nav a.on{color:var(--brand);font-weight:500;background:var(--brand-soft)}
.nav-item{position:relative}
.drop{
  position:absolute;top:calc(100% + 10px);left:50%;transform:translateX(-50%) translateY(-6px);
  background:var(--white);border:1px solid var(--line);border-radius:12px;
  box-shadow:var(--shadow-lg);padding:8px;min-width:200px;
  opacity:0;visibility:hidden;transition:.18s;
}
.nav-item:hover .drop{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0)}
.drop a{display:block;padding:10px 12px;border-radius:8px;font-size:14px;color:var(--ink);transition:.15s}
.drop a:hover{background:var(--bg-soft);color:var(--brand)}
.drop a small{display:block;color:var(--ink-3);font-size:12px;line-height:1.5}
.hdr-cta{display:flex;align-items:center;gap:12px;flex-shrink:0}
.burger{display:none;width:40px;height:40px;align-items:center;justify-content:center;border-radius:8px}
.burger:hover{background:var(--bg-soft)}
.burger svg{width:22px;height:22px;stroke:var(--ink)}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 22px;border-radius:8px;font-size:15px;font-weight:500;
  transition:.18s;white-space:nowrap;
}
.btn-p{background:var(--brand);color:#fff}
.btn-p:hover{background:var(--brand-dark);transform:translateY(-1px);box-shadow:0 6px 18px rgba(0,82,217,.28)}
.btn-o{background:transparent;color:#fff;border:1px solid rgba(255,255,255,.42)}
.btn-o:hover{background:rgba(255,255,255,.12);border-color:#fff}
.btn-w{background:#fff;color:var(--brand);font-weight:600}
.btn-w:hover{transform:translateY(-1px);box-shadow:0 6px 18px rgba(0,0,0,.18)}
.btn-lg{height:52px;padding:0 30px;font-size:16px}

/* ---------- Sections ---------- */
.sec{padding:88px 0}
.sec-soft{background:var(--bg-soft)}
.eyebrow{display:inline-block;font-size:14px;font-weight:500;color:var(--brand);margin-bottom:14px}
.sec-h{max-width:760px;margin-bottom:48px}
.sec-h h2{font-size:36px;line-height:1.35;font-weight:700;letter-spacing:-.4px;margin-bottom:14px}
.sec-h p{font-size:17px;color:var(--ink-2)}
.center{margin-left:auto;margin-right:auto;text-align:center}

/* ---------- Hero ---------- */
.hero{
  position:relative;overflow:hidden;
  background:linear-gradient(180deg,var(--dark) 0%,var(--dark-2) 100%);
  color:#fff;padding:100px 0 84px;
}
.hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:
    radial-gradient(820px 420px at 80% 18%,rgba(0,82,217,.34),transparent 62%),
    radial-gradient(520px 320px at 10% 92%,rgba(0,140,255,.15),transparent 60%);
}
.hero-in{position:relative;display:grid;grid-template-columns:1fr .88fr;gap:48px;align-items:center}
.hero-tag{
  display:inline-flex;align-items:center;gap:8px;
  padding:7px 14px;border-radius:999px;font-size:13px;font-weight:500;
  background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.16);
  color:#C9D2E3;margin-bottom:24px;
}
.hero-tag i{width:6px;height:6px;border-radius:50%;background:#4C8DFF;display:inline-block}
.hero h1{font-size:50px;line-height:1.24;font-weight:700;letter-spacing:-1px;margin-bottom:20px}
.hero-sub{font-size:18px;color:#C9CDD4;max-width:600px;margin-bottom:32px}
.hero-btns{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:34px}
.trust{display:flex;flex-wrap:wrap;gap:26px;padding-top:26px;border-top:1px solid rgba(255,255,255,.12)}
.trust span{display:flex;align-items:center;gap:8px;font-size:14px;color:#9AA4B8}
.trust svg{width:15px;height:15px;stroke:#4C8DFF;flex-shrink:0}

/* ---------- Hero visual : 产品工作台窗口 ---------- */
.hero-visual{position:relative;min-height:400px;display:flex;align-items:center}
.hv-window{
  width:100%;display:flex;flex-direction:column;
  background:rgba(255,255,255,.055);
  border:1px solid rgba(255,255,255,.13);border-radius:16px;
  backdrop-filter:blur(10px);overflow:hidden;
  box-shadow:0 30px 70px rgba(0,0,0,.42);
  animation:riseIn .8s cubic-bezier(.2,.8,.3,1) both;
}
@keyframes riseIn{from{opacity:0;transform:translateY(18px)}to{opacity:1;transform:none}}
.hv-bar{
  display:flex;align-items:center;gap:12px;padding:13px 16px;
  border-bottom:1px solid rgba(255,255,255,.10);background:rgba(255,255,255,.045);
}
.hv-dots{display:flex;gap:6px;flex-shrink:0}
.hv-dots i{width:9px;height:9px;border-radius:50%;background:rgba(255,255,255,.2);display:block}
.hv-dots i:first-child{background:#4C8DFF}
.hv-bar-t{font-size:12.5px;color:#C9D2E3;font-weight:500;letter-spacing:.2px}
.hv-bar-tag{margin-left:auto;font-size:11px;color:#7E8AA0;border:1px solid rgba(255,255,255,.14);padding:3px 8px;border-radius:6px}
.hv-body{display:grid;grid-template-columns:132px 1fr;flex:1}
.hv-side{padding:12px;border-right:1px solid rgba(255,255,255,.09);display:flex;flex-direction:column;gap:2px}
.hv-pitem{display:flex;align-items:center;gap:8px;padding:8px 9px;border-radius:8px;font-size:12px;color:#93A0B5;transition:.2s}
.hv-pitem.on{background:rgba(76,141,255,.18);color:#fff;font-weight:500}
.hv-pitem svg{width:13px;height:13px;stroke:currentColor;flex-shrink:0;opacity:.92}
.hv-main{padding:16px;display:flex;flex-direction:column;gap:10px;min-height:0}
.hv-msg{border-radius:10px;padding:11px 13px;font-size:12.5px;line-height:1.65}
.hv-msg-user{align-self:flex-end;background:rgba(76,141,255,.22);color:#E6EEFF;max-width:90%}
.hv-msg-ai{background:rgba(255,255,255,.07);color:#C4CDDB;border:1px solid rgba(255,255,255,.08)}
.hv-task{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:7px 0 0;margin-top:5px;border-top:1px dashed rgba(255,255,255,.11);font-size:12px}
.hv-task:first-of-type{border-top:none;padding-top:2px;margin-top:8px}
.hv-task span{color:#B4BFD2}
.hv-task i{width:38px;height:5px;border-radius:3px;background:rgba(255,255,255,.16);display:block;flex-shrink:0}
.hv-task i.done{background:#3CCF8E}
.hv-task i.run{background:linear-gradient(90deg,#0052D9,#4C8DFF)}
.hv-foot{
  margin-top:auto;padding-top:11px;border-top:1px solid rgba(255,255,255,.09);
  font-size:11.5px;color:#7E8AA0;display:flex;align-items:center;gap:7px;
}
.hv-foot em{width:6px;height:6px;border-radius:50%;background:#3CCF8E;display:block;animation:pulse 1.8s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.3}}

/* 产品页 hero 视觉（紧凑卡片） */
.hv-card{
  position:absolute;background:rgba(255,255,255,.07);
  border:1px solid rgba(255,255,255,.14);border-radius:14px;
  backdrop-filter:blur(6px);padding:16px 18px;
}
.hv-1{top:14px;right:0;width:252px;animation:float 7s ease-in-out infinite}
.hv-2{top:126px;right:52px;width:212px;animation:float 7s ease-in-out 1.4s infinite}
.hv-3{bottom:6px;right:10px;width:232px;animation:float 7s ease-in-out 2.8s infinite}
.hv-head{display:flex;align-items:center;gap:9px;margin-bottom:12px}
.hv-dot{width:22px;height:22px;border-radius:6px;background:linear-gradient(135deg,#0052D9,#4C8DFF);flex-shrink:0}
.hv-title{font-size:13px;font-weight:600;color:#fff}
.hv-line{height:7px;border-radius:4px;background:rgba(255,255,255,.16);margin-bottom:8px}
.hv-line.w70{width:70%} .hv-line.w50{width:50%} .hv-line.w85{width:85%} .hv-line.w40{width:40%}
.hv-line.blue{background:linear-gradient(90deg,#0052D9,#4C8DFF)}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-10px)}}

/* ---------- Stats ---------- */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:44px}
.stat{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:28px 24px;transition:.2s}
.stat:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg);border-color:#D6E1F5}
.stat b{display:block;font-size:38px;line-height:1.15;font-weight:700;color:var(--brand);letter-spacing:-1px;margin-bottom:6px}
.stat span{font-size:14px;color:var(--ink-2)}

/* ---------- Cards ---------- */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.card{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:28px;transition:.2s}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg)}
.ico{
  width:46px;height:46px;border-radius:12px;display:flex;align-items:center;justify-content:center;
  background:var(--brand-soft);margin-bottom:18px;
}
.ico svg{width:22px;height:22px;stroke:var(--brand)}
.card h3{font-size:18px;font-weight:700;margin-bottom:8px}
.card p{font-size:14px;color:var(--ink-2)}
.card-sm{padding:24px}
.card-sm h3{font-size:16px;margin-bottom:6px}
.card-sm p{font-size:13px}
.card-sm .ico{width:40px;height:40px;margin-bottom:14px}
.card-sm .ico svg{width:19px;height:19px}

/* ---------- Product rows ---------- */
.prow{
  display:flex;align-items:center;gap:24px;
  background:var(--white);border:1px solid var(--line);border-radius:var(--radius);
  padding:24px 28px;margin-bottom:14px;transition:.2s;
}
.prow:hover{transform:translateX(4px);border-color:#C7D8F7;box-shadow:var(--shadow-lg)}
.prow-ico{
  width:52px;height:52px;border-radius:14px;flex-shrink:0;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,var(--brand),#4C8DFF);
}
.prow-ico svg{width:25px;height:25px;stroke:#fff}
.prow-body{flex:1;min-width:0}
.prow-body h3{font-size:18px;font-weight:700;margin-bottom:5px;display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.prow-body h3 em{font-style:normal;font-size:13px;font-weight:500;color:var(--brand);background:var(--brand-soft);padding:3px 9px;border-radius:6px}
.prow-body p{font-size:14px;color:var(--ink-2)}
.prow-arrow{flex-shrink:0;display:flex;align-items:center;gap:6px;font-size:14px;font-weight:500;color:var(--brand)}
.prow-arrow svg{width:17px;height:17px;stroke:var(--brand);transition:.2s}
.prow:hover .prow-arrow svg{transform:translateX(4px)}

/* ---------- Case ---------- */
.case-tag{font-size:14px;font-weight:500;color:var(--brand);margin-bottom:16px}
.case-num{font-size:38px;font-weight:700;color:var(--brand);line-height:1.1;letter-spacing:-1px;margin-bottom:4px}
.case-lbl{font-size:15px;font-weight:500;margin-bottom:14px}
.case p{font-size:14px;color:var(--ink-2)}

/* ---------- Steps ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:44px}
.step{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:28px 24px}
.step b{display:block;font-size:32px;font-weight:700;color:var(--brand);line-height:1;margin-bottom:14px;letter-spacing:-1px}
.step h3{font-size:16px;font-weight:700;margin-bottom:6px}
.step p{font-size:13px;color:var(--ink-2)}

/* ---------- CTA ---------- */
.cta{background:linear-gradient(135deg,var(--brand) 0%,var(--dark) 100%);padding:88px 0;text-align:center;position:relative;overflow:hidden}
.cta::before{content:"";position:absolute;inset:0;background:radial-gradient(620px 320px at 50% 0%,rgba(255,255,255,.16),transparent 62%)}
.cta-in{position:relative}
.cta h2{font-size:38px;font-weight:700;color:#fff;letter-spacing:-.6px;margin-bottom:14px}
.cta p{font-size:17px;color:#CCE0FF;margin-bottom:32px}
.cta-btns{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}

/* ---------- Product hero ---------- */
.phero{background:linear-gradient(180deg,var(--dark) 0%,var(--dark-2) 100%);color:#fff;padding:84px 0 76px;position:relative;overflow:hidden}
.phero::before{content:"";position:absolute;inset:0;background:radial-gradient(680px 340px at 76% 30%,rgba(0,82,217,.32),transparent 62%)}
.phero-in{position:relative;display:grid;grid-template-columns:1fr .82fr;gap:48px;align-items:center}
.phero h1{font-size:42px;line-height:1.3;font-weight:700;letter-spacing:-.8px;margin-bottom:18px}
.phero-sub{font-size:17px;color:#C9CDD4;margin-bottom:30px;max-width:640px}
.pvisual{position:relative;height:330px}

/* ---------- Contact ---------- */
.contact-grid{display:grid;grid-template-columns:.86fr 1.14fr;gap:24px;align-items:start}
.info-card,.form-card{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:32px}
.info-card h2{font-size:24px;font-weight:700;margin-bottom:10px}
.info-card>.sub{font-size:15px;color:var(--ink-2);margin-bottom:26px}
.info-row{display:flex;gap:16px;padding:18px 0;border-top:1px solid var(--line)}
.info-row:first-of-type{border-top:none;padding-top:0}
.info-ico{width:40px;height:40px;border-radius:10px;background:var(--brand-soft);display:flex;align-items:center;justify-content:center;flex-shrink:0}
.info-ico svg{width:19px;height:19px;stroke:var(--brand)}
.info-lbl{font-size:13px;color:var(--ink-3);margin-bottom:3px}
.info-val{font-size:15px;font-weight:500;line-height:1.6}
.info-val a:hover{color:var(--brand)}
.qr{margin-top:22px;padding-top:22px;border-top:1px solid var(--line);display:flex;gap:18px;align-items:center}
.qr img{width:118px;height:118px;border-radius:10px;border:1px solid var(--line);object-fit:cover}
.qr-txt h4{font-size:15px;font-weight:600;margin-bottom:5px}
.qr-txt p{font-size:13px;color:var(--ink-2)}
.field{margin-bottom:18px}
.field label{display:block;font-size:14px;font-weight:500;margin-bottom:8px}
.field label i{color:#F53F3F;font-style:normal;margin-left:3px}
.field input,.field textarea{
  width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:var(--radius-sm);
  font-size:15px;font-family:inherit;color:var(--ink);background:#fff;transition:.16s;
}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(0,82,217,.12)}
.field textarea{min-height:112px;resize:vertical}
.field input::placeholder,.field textarea::placeholder{color:var(--ink-3)}
.form-note{font-size:12px;color:var(--ink-3);margin-top:14px;text-align:center}
.map{
  margin-top:24px;height:280px;border-radius:var(--radius);
  background:linear-gradient(135deg,#EEF3FA,#E4EBF5);
  border:1px solid var(--line);
  display:flex;align-items:center;justify-content:center;flex-direction:column;gap:10px;
  color:var(--ink-3);font-size:15px;
}
.map svg{width:34px;height:34px;stroke:#A9B4C6}

/* ---------- Footer ---------- */
.ftr{background:var(--dark);color:#C9CDD4;padding:64px 0 0}
.ftr-grid{display:grid;grid-template-columns:1.7fr .8fr .8fr .8fr;gap:36px;padding-bottom:44px}
.ftr-brand img{height:34px;width:auto;margin-bottom:18px}
.ftr-brand p{font-size:14px;color:#86909C;max-width:300px;margin-bottom:20px}
.ftr-contact{display:flex;flex-direction:column;gap:11px;font-size:14px}
.ftr-contact a,.ftr-contact div{display:flex;align-items:flex-start;gap:9px;transition:.16s;line-height:1.6}
.ftr-contact a:hover{color:#fff}
.ftr-contact svg{width:15px;height:15px;stroke:#6B7785;flex-shrink:0;margin-top:4px}
.ftr h4{font-size:15px;font-weight:600;color:#fff;margin-bottom:18px}
.ftr ul{list-style:none;display:flex;flex-direction:column;gap:11px}
.ftr ul a{font-size:14px;transition:.16s}
.ftr ul a:hover{color:#fff}
.ftr-bot{border-top:1px solid #26292F;padding:22px 0;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13px;color:#7A8699}

/* ---------- Toast ---------- */
.toast{
  position:fixed;left:50%;bottom:40px;transform:translateX(-50%) translateY(20px);
  background:var(--ink);color:#fff;padding:14px 22px;border-radius:10px;font-size:14px;
  box-shadow:var(--shadow-lg);opacity:0;visibility:hidden;transition:.24s;z-index:200;
  display:flex;align-items:center;gap:9px;max-width:90vw;
}
.toast.on{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0)}
.toast svg{width:17px;height:17px;stroke:#52D98A;flex-shrink:0}

.page{display:none}
.page.on{display:block}

/* ---------- Responsive ---------- */
@media(max-width:1024px){
  .hero-in,.phero-in{grid-template-columns:1fr;gap:36px}
  .hero-visual{min-height:0;max-width:560px}
  .pvisual{display:none}
  .stats,.grid-4,.steps{grid-template-columns:repeat(2,1fr)}
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .contact-grid{grid-template-columns:1fr}
  .ftr-grid{grid-template-columns:1fr 1fr;gap:32px}
  .hero h1{font-size:40px}
  .phero h1{font-size:34px}
  .sec-h h2{font-size:30px}
}
@media(max-width:768px){
  .burger{display:flex}
  .nav{
    display:none;position:absolute;top:72px;left:0;right:0;
    background:#fff;border-bottom:1px solid var(--line);
    flex-direction:column;align-items:stretch;gap:0;padding:12px 16px 18px;
    box-shadow:var(--shadow-lg);max-height:calc(100vh - 72px);overflow-y:auto;
  }
  .nav.open{display:flex}
  .nav a{padding:13px 12px;font-size:16px;border-radius:8px}
  .nav-item .drop{position:static;transform:none;opacity:1;visibility:visible;box-shadow:none;border:none;padding:0 0 0 12px;min-width:0;background:transparent}
  .nav-item:hover .drop{transform:none}
  .hdr-cta .btn{display:none}
  .hdr-cta .btn-m{display:inline-flex;height:38px;padding:0 16px;font-size:14px}
  .sec{padding:56px 0}
  .hero{padding:68px 0 56px}
  .hero h1{font-size:31px;letter-spacing:-.4px}
  .hero-sub{font-size:16px}
  .hero-visual{display:none}
  .trust{gap:16px}
  .trust span{font-size:13px}
  .stats,.grid-3,.grid-4,.steps{grid-template-columns:1fr}
  .sec-h h2{font-size:26px}
  .cta h2{font-size:27px}
  .prow{flex-direction:column;align-items:flex-start;gap:16px;padding:22px}
  .prow-arrow{display:none}
  .ftr-grid{grid-template-columns:1fr;gap:28px}
  .info-card,.form-card{padding:24px}
  .phero{padding:58px 0 50px}
  .phero h1{font-size:27px}
  .map{height:200px}
}
.btn-m{display:none}