:root{
  --blue:#185FA5; --blue-d:#134C84; --blue-l:#E8F1F9;
  --green:#0E9F6E; --green-l:#E6F6EF;
  --orange:#F5A623; --orange-d:#D98A06;
  --ink:#1A1A1A; --sub:#6B7280; --line:#E5E7EB; --bg:#F5F6F8;
  --white:#fff; --radius:14px; --shadow:0 6px 24px rgba(20,40,70,.08);
  --maxw:1180px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--white);line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 20px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 26px;border-radius:10px;font-size:15px;font-weight:600;cursor:pointer;border:none;transition:.18s;white-space:nowrap}
.btn-primary{background:var(--blue);color:#fff}
.btn-primary:hover{background:var(--blue-d)}
.btn-orange{background:var(--orange);color:#fff}
.btn-orange:hover{background:var(--orange-d)}
.btn-ghost{background:#fff;color:var(--blue);border:1px solid var(--blue)}
.btn-ghost:hover{background:var(--blue-l)}
.btn-lg{padding:15px 34px;font-size:17px}
.section{padding:72px 0}
.section.alt{background:var(--bg)}
.tit{font-size:30px;font-weight:800;letter-spacing:-.5px}
.tit .em{color:var(--blue)}
.sub-tit{color:var(--sub);font-size:16px;margin-top:12px;max-width:680px}
.center{text-align:center}
.center .sub-tit{margin-left:auto;margin-right:auto}

/* header */
 header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:66px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px;color:var(--ink)}
.logo svg{width:32px;height:32px;flex:none}
.logo .t{color:var(--blue)}
.menu{display:flex;gap:30px;align-items:center}
.menu a{font-size:15px;color:var(--ink);font-weight:500;position:relative;padding:4px 0}
.menu a:hover{color:var(--blue)}
.menu a.active{color:var(--blue)}
.menu a.active::after{content:"";position:absolute;left:0;right:0;bottom:-22px;height:3px;background:var(--blue);border-radius:2px}
.nav-cta{display:flex;gap:12px;align-items:center}
.burger{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:8px}
.burger span{width:22px;height:2px;background:var(--ink);display:block}

/* hero */
.hero{background:linear-gradient(135deg,#0E3A66 0%,#185FA5 60%,#2E7BC0 100%);color:#fff;padding:84px 0 92px;position:relative;overflow:hidden}
.hero::after{content:"";position:absolute;right:-120px;top:-80px;width:420px;height:420px;border-radius:50%;background:rgba(255,255,255,.07)}
.hero .wrap{position:relative;z-index:2}
.hero h1{font-size:44px;line-height:1.25;font-weight:800;max-width:760px}
.hero h1 .hl{color:#FFD27A}
.hero p{font-size:18px;margin-top:18px;max-width:600px;color:rgba(255,255,255,.86)}
.hero-cta{margin-top:32px;display:flex;gap:16px;flex-wrap:wrap}
.hero-stats{margin-top:46px;display:flex;gap:46px;flex-wrap:wrap}
.hero-stats .s b{font-size:30px;display:block;font-weight:800}
.hero-stats .s span{color:rgba(255,255,255,.8);font-size:14px}

/* grid */
.grid{display:grid;gap:22px}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.grid-2{grid-template-columns:repeat(2,1fr)}
.card{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:26px;transition:.18s}
.card:hover{box-shadow:var(--shadow);transform:translateY(-3px);border-color:transparent}
.card .ic{width:48px;height:48px;border-radius:12px;background:var(--blue-l);display:flex;align-items:center;justify-content:center;margin-bottom:16px}
.card .ic svg{width:26px;height:26px;stroke:var(--blue)}
.card h3{font-size:18px;margin-bottom:8px}
.card p{color:var(--sub);font-size:14px}

/* steps */
.steps{counter-reset:s}
.step{display:flex;gap:18px;align-items:flex-start}
.step .n{counter-increment:s;flex:none;width:42px;height:42px;border-radius:50%;background:var(--blue);color:#fff;font-weight:800;display:flex;align-items:center;justify-content:center;font-size:18px}
.step .n::before{content:counter(s)}
.step h4{font-size:17px;margin-bottom:4px}
.step p{color:var(--sub);font-size:14px}

/* roles */
.role{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:30px;display:flex;flex-direction:column;gap:14px}
.role .tag{display:inline-block;font-size:13px;font-weight:700;padding:4px 12px;border-radius:20px}
.role.c .tag{background:var(--blue-l);color:var(--blue)}
.role.t .tag{background:var(--green-l);color:var(--green)}
.role.e .tag{background:#FFF3E0;color:var(--orange-d)}
.role ul{list-style:none;display:flex;flex-direction:column;gap:10px}
.role li{display:flex;gap:10px;font-size:14px;color:var(--ink)}
.role li svg{width:18px;height:18px;flex:none;stroke:var(--green);margin-top:3px}

/* cat wall */
.cat-group{margin-bottom:34px}
.cat-group h3{font-size:20px;margin-bottom:16px;display:flex;align-items:center;gap:10px}
.cat-group h3 .dot{width:10px;height:10px;border-radius:3px;background:var(--blue)}
.cat-list{display:flex;flex-wrap:wrap;gap:12px}
.chip{background:var(--bg);border:1px solid var(--line);border-radius:10px;padding:10px 16px;font-size:14px;font-weight:500;transition:.15s}
.chip:hover{background:var(--blue-l);border-color:var(--blue);color:var(--blue)}

/* trust */
.trust{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.trust .card .ic{background:var(--green-l)}
.trust .card .ic svg{stroke:var(--green)}

/* CTA band */
.cta-band{background:var(--blue);color:#fff;border-radius:20px;padding:48px;text-align:center}
.cta-band h2{font-size:28px;margin-bottom:10px}
.cta-band p{color:rgba(255,255,255,.85);margin-bottom:24px}

/* 真实案例区块 (官网内容深化) */
.case-card{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:26px;display:flex;flex-direction:column;gap:10px;transition:.18s}
.case-card:hover{box-shadow:var(--shadow);transform:translateY(-3px);border-color:transparent}
.case-card .ic{width:48px;height:48px;border-radius:12px;background:var(--blue-l);display:flex;align-items:center;justify-content:center}
.case-card .ic svg{width:26px;height:26px;stroke:var(--blue)}
.case-tag{display:inline-block;align-self:flex-start;font-size:12px;font-weight:700;padding:3px 12px;border-radius:20px;background:var(--green-l);color:var(--green)}
.case-card h3{font-size:17px;margin-top:2px}
.case-card p{color:var(--sub);font-size:14px;flex:1}
.case-foot{display:flex;gap:14px;align-items:center;border-top:1px solid var(--line);padding-top:12px;margin-top:4px;font-size:13px;color:var(--sub)}
.case-star{color:var(--orange-d);font-weight:700}

/* 资质与合规区块 (官网内容深化) */
.qcard{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:26px;transition:.18s}
.qcard:hover{box-shadow:var(--shadow);transform:translateY(-3px);border-color:transparent}
.qcard .ic{width:48px;height:48px;border-radius:12px;background:var(--blue-l);display:flex;align-items:center;justify-content:center;margin-bottom:14px}
.qcard .ic svg{width:26px;height:26px;stroke:var(--blue)}
.qcard h3{font-size:17px;margin-bottom:8px}
.qcard p{color:var(--sub);font-size:14px}

/* footer */
footer{background:#0F2336;color:#C7D2DE;padding:54px 0 30px}
.foot{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:30px}
.foot h4{color:#fff;font-size:15px;margin-bottom:16px}
.foot a{display:block;color:#C7D2DE;font-size:14px;margin-bottom:10px}
.foot a:hover{color:#fff}
.foot .desc{font-size:14px;line-height:1.7;max-width:320px;margin-top:12px}
.foot-bottom{border-top:1px solid rgba(255,255,255,.1);margin-top:36px;padding-top:20px;font-size:13px;color:#8FA3B5;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px}

/* form */
.form{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:34px;max-width:620px;margin:0 auto;box-shadow:var(--shadow)}
.form .row{margin-bottom:18px}
.form label{display:block;font-size:14px;font-weight:600;margin-bottom:8px}
.form label .req{color:#E0483B;margin-left:2px}
.form input,.form select,.form textarea{width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:10px;font-size:15px;font-family:inherit;background:#fff;color:var(--ink)}
.form input:focus,.form select:focus,.form textarea:focus{outline:none;border-color:var(--blue);box-shadow:0 0 0 3px var(--blue-l)}
.form textarea{resize:vertical;min-height:96px}
.form .hint{font-size:13px;color:var(--sub);margin-top:6px}
.form .two{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.form-ok{background:var(--green-l);border:1px solid var(--green);color:#0B7D55;border-radius:12px;padding:18px;text-align:center;font-weight:600;margin-top:8px}
.form-err{background:#FDECEA;color:#C0392B;border-radius:10px;padding:12px;font-size:14px;margin-top:6px}
.seg{display:flex;gap:10px;flex-wrap:wrap}
.seg label{display:flex;align-items:center;gap:8px;padding:10px 16px;border:1px solid var(--line);border-radius:10px;cursor:pointer;font-weight:500}
.seg input{width:auto}

/* mobile guide */
.mguide{min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:30px;background:linear-gradient(160deg,#0E3A66,#185FA5)}
.mguide .logo{color:#fff;font-size:22px;margin-bottom:26px}
.mguide h1{color:#fff;font-size:26px;margin-bottom:10px}
.mguide p{color:rgba(255,255,255,.85);margin-bottom:30px}
.qr{width:220px;height:220px;background:#fff;border-radius:18px;padding:16px;display:flex;align-items:center;justify-content:center}
.qr svg{width:100%;height:100%}
.mguide .tip{color:rgba(255,255,255,.7);font-size:13px;margin-top:22px;max-width:300px}
.mguide .open{margin-top:24px}

@media(max-width:980px){
  .grid-3,.grid-4,.grid-2{grid-template-columns:1fr 1fr}
  .trust{grid-template-columns:1fr 1fr}
  .foot{grid-template-columns:1fr 1fr}
}
@media(max-width:680px){
  .menu{display:none}
  .burger{display:flex}
  .hero h1{font-size:32px}
  .tit{font-size:24px}
  .grid-3,.grid-4,.grid-2{grid-template-columns:1fr}
  .trust{grid-template-columns:1fr}
  .form .two{grid-template-columns:1fr}
  .hero-stats{gap:26px}
}