:root{
  --navy:#1F4E79;
  --navy-dark:#153A5B;
  --navy-light:#2E6DA4;
  --gold:#C99A3A;
  --bg:#F5F7FA;
  --card:#FFFFFF;
  --text:#2A2A2A;
  --muted:#6B7280;
  --border:#E3E7EC;
}
*{box-sizing:border-box;margin:0;padding:0;}
body{
  font-family:"PingFang SC","Microsoft YaHei",Arial,sans-serif;
  background:var(--bg);
  color:var(--text);
  line-height:1.6;
}
a{text-decoration:none;color:inherit;}
ul{list-style:none;}
img{max-width:100%;display:block;}
.wrap{max-width:1120px;margin:0 auto;padding:0 20px;}

/* Header */
header{
  position:sticky;top:0;z-index:100;
  background:#fff;
  border-bottom:1px solid var(--border);
}
.nav-inner{
  display:flex;align-items:center;justify-content:space-between;
  padding:12px 20px;max-width:1120px;margin:0 auto;
}
.brand{display:flex;align-items:center;gap:10px;}
.brand img{height:38px;width:38px;border-radius:8px;object-fit:cover;}
.brand span{font-weight:700;font-size:17px;color:var(--navy-dark);}
nav.main-nav{display:flex;gap:28px;}
nav.main-nav a{font-size:14.5px;color:var(--text);font-weight:500;}
nav.main-nav a:hover,nav.main-nav a.active{color:var(--navy);}
.nav-cta{
  background:var(--navy);color:#fff;padding:9px 20px;border-radius:8px;
  font-size:14px;font-weight:600;white-space:nowrap;
}
.nav-cta:hover{background:var(--navy-light);}
.menu-toggle{display:none;background:none;border:none;font-size:22px;cursor:pointer;color:var(--navy-dark);}

@media (max-width:820px){
  nav.main-nav{
    display:none;position:absolute;top:62px;left:0;right:0;
    background:#fff;flex-direction:column;gap:0;
    border-bottom:1px solid var(--border);
  }
  nav.main-nav.open{display:flex;}
  nav.main-nav a{padding:14px 20px;border-bottom:1px solid var(--border);}
  .menu-toggle{display:block;}
  .nav-cta{display:none;}
}

/* Hero (homepage) */
.hero{
  position:relative;overflow:hidden;
  background:
    radial-gradient(circle at 1px 1px, rgba(255,255,255,.08) 1px, transparent 0) 0 0/28px 28px,
    linear-gradient(135deg,var(--navy) 0%,var(--navy-dark) 100%);
  color:#fff;padding:64px 20px 72px;text-align:center;
}
.hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(circle at 85% 12%, rgba(201,154,58,.25), transparent 45%),
             radial-gradient(circle at 8% 90%, rgba(46,109,164,.35), transparent 40%);
}
.hero .wrap{position:relative;z-index:2;}
.hero-graphic{
  position:absolute;top:50%;right:-60px;transform:translateY(-50%);
  width:480px;max-width:46%;z-index:1;opacity:.85;pointer-events:none;
}
@media (max-width:900px){
  .hero-graphic{display:none;}
}
.hero h1{font-size:32px;font-weight:700;margin-bottom:16px;line-height:1.4;}
.hero p{font-size:15.5px;opacity:.9;max-width:560px;margin:0 auto 32px;}
.hero-btns{display:flex;gap:16px;justify-content:center;flex-wrap:wrap;}
.btn-gold{
  background:var(--gold);color:#fff;padding:14px 30px;border-radius:10px;
  font-weight:700;font-size:15px;border:none;cursor:pointer;display:inline-block;
}
.btn-outline{
  background:transparent;color:#fff;padding:14px 30px;border-radius:10px;
  font-weight:700;font-size:15px;border:1.5px solid rgba(255,255,255,.7);cursor:pointer;display:inline-block;
}

/* Page header (sub-pages) */
.page-header{
  background:linear-gradient(135deg,var(--navy) 0%,var(--navy-dark) 100%);
  color:#fff;padding:48px 20px;text-align:center;
}
.page-header h1{font-size:26px;margin-bottom:10px;}
.page-header p{font-size:14px;opacity:.85;max-width:560px;margin:0 auto;}

/* Section shared */
section{padding:64px 0;}
.section-head{text-align:center;margin-bottom:40px;}
.section-head h2{font-size:24px;color:var(--navy-dark);margin-bottom:8px;}
.section-head p{color:var(--muted);font-size:14px;}
.section-alt{background:#fff;}

/* Services */
.service-grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:20px;
}
.service-card{
  background:var(--card);border:1px solid var(--border);border-radius:14px;
  padding:26px 22px;text-align:left;
}
.service-card .icon{
  width:44px;height:44px;border-radius:10px;background:#EEF3F8;color:var(--navy);
  display:flex;align-items:center;justify-content:center;font-size:20px;margin-bottom:16px;
}
.service-card h3{font-size:16px;margin-bottom:8px;color:var(--navy-dark);}
.service-card p{font-size:13.5px;color:var(--muted);margin-bottom:14px;}
.service-card .more{font-size:13px;color:var(--gold);font-weight:600;}

/* Trust bar */
.trust-bar{
  background:var(--navy-dark);color:#fff;
}
.trust-grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:20px;text-align:center;padding:36px 0;
}
.trust-grid .num{font-size:28px;font-weight:700;color:var(--gold);}
.trust-grid .label{font-size:13px;opacity:.85;margin-top:6px;}

/* Cases */
.case-filter{display:flex;gap:10px;flex-wrap:wrap;justify-content:center;margin-bottom:32px;}
.case-filter button{
  background:#fff;border:1px solid var(--border);color:var(--text);
  padding:8px 18px;border-radius:20px;font-size:13.5px;cursor:pointer;
}
.case-filter button.active,.case-filter button:hover{background:var(--navy);color:#fff;border-color:var(--navy);}
.case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.case-card{
  background:var(--card);border:1px solid var(--border);border-radius:14px;overflow:hidden;
}
.case-tag-row{padding:18px 20px 0;display:flex;gap:8px;flex-wrap:wrap;}
.tag{
  background:#EEF3F8;color:var(--navy);font-size:11.5px;font-weight:600;
  padding:4px 10px;border-radius:20px;
}
.case-card .body{padding:14px 20px 20px;}
.case-card h4{font-size:15px;margin-bottom:6px;color:var(--navy-dark);}
.case-card p{font-size:13px;color:var(--muted);margin-bottom:12px;}
.case-card .result{font-size:13.5px;font-weight:700;color:var(--gold);}

/* News */
.news-filter{display:flex;gap:10px;flex-wrap:wrap;justify-content:center;margin-bottom:32px;}
.news-filter button{
  background:#fff;border:1px solid var(--border);color:var(--text);
  padding:8px 18px;border-radius:20px;font-size:13.5px;cursor:pointer;
}
.news-filter button.active,.news-filter button:hover{background:var(--navy);color:#fff;border-color:var(--navy);}
.news-list{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.news-card{
  background:var(--card);border:1px solid var(--border);border-radius:14px;padding:22px;
}
.news-card .date{font-size:12px;color:var(--muted);margin-bottom:8px;}
.news-card .cat{
  display:inline-block;font-size:11px;font-weight:600;color:var(--gold);
  background:#FBF6EA;padding:2px 9px;border-radius:10px;margin-bottom:8px;
}
.news-card h4{font-size:15px;margin-bottom:8px;color:var(--navy-dark);}
.news-card p{font-size:13px;color:var(--muted);}

/* Assessment CTA */
.assess-cta{
  background:linear-gradient(135deg,var(--gold) 0%,#B5852E 100%);
  color:#fff;text-align:center;border-radius:20px;padding:48px 30px;
  max-width:1120px;margin:0 auto;
}
.assess-cta h2{font-size:24px;margin-bottom:12px;}
.assess-cta p{font-size:14.5px;opacity:.95;margin-bottom:26px;}
.assess-cta .btn-white{
  background:#fff;color:var(--gold);padding:14px 32px;border-radius:10px;
  font-weight:700;font-size:15px;display:inline-block;
}

/* Service detail (业务范围页) */
.service-detail{
  background:var(--card);border:1px solid var(--border);border-radius:16px;
  padding:32px;margin-bottom:24px;scroll-margin-top:80px;
}
.service-detail .head{display:flex;align-items:center;gap:14px;margin-bottom:16px;}
.service-detail .head .icon{
  width:48px;height:48px;border-radius:12px;background:#EEF3F8;color:var(--navy);
  display:flex;align-items:center;justify-content:center;font-size:22px;flex-shrink:0;
}
.service-detail h3{font-size:19px;color:var(--navy-dark);}
.service-detail .desc{font-size:14px;color:var(--muted);margin-bottom:20px;}
.service-detail .sub-title{font-size:14px;font-weight:700;color:var(--navy);margin:18px 0 10px;}
.timeline{display:flex;flex-wrap:wrap;gap:14px;}
.timeline .step{
  flex:1;min-width:140px;background:#F5F7FA;border-radius:10px;padding:14px 16px;
  border-left:3px solid var(--gold);
}
.timeline .step .n{font-size:12px;color:var(--gold);font-weight:700;margin-bottom:4px;}
.timeline .step p{font-size:13px;color:var(--text);}
.faq-item{border-bottom:1px solid var(--border);padding:12px 0;}
.faq-item:last-child{border-bottom:none;}
.faq-item .q{font-size:13.5px;font-weight:600;color:var(--navy-dark);margin-bottom:6px;}
.faq-item .a{font-size:13px;color:var(--muted);}
.service-detail .cta-row{margin-top:20px;}
.btn-navy{
  background:var(--navy);color:#fff;padding:11px 24px;border-radius:8px;
  font-size:13.5px;font-weight:600;display:inline-block;
}
.btn-navy:hover{background:var(--navy-light);}

/* Footer */
footer{background:var(--navy-dark);color:#fff;padding:48px 0 24px;}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:32px;margin-bottom:32px;}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
.footer-brand img{height:34px;width:34px;border-radius:8px;}
.footer-brand span{font-weight:700;font-size:16px;}
footer p{font-size:13px;opacity:.8;line-height:1.8;}
footer h5{font-size:14px;margin-bottom:14px;opacity:.95;}
footer .qr-img{
  width:100px;height:100px;border-radius:10px;object-fit:cover;
  background:#fff;padding:4px;margin-bottom:10px;
}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.15);padding-top:18px;text-align:center;
  font-size:12px;opacity:.6;
}

@media (max-width:820px){
  .service-grid,.case-grid,.news-list{grid-template-columns:1fr 1fr;}
  .trust-grid{grid-template-columns:1fr 1fr;}
  .footer-grid{grid-template-columns:1fr;}
  .hero h1{font-size:24px;}
  .timeline .step{min-width:120px;}
}
@media (max-width:520px){
  .service-grid,.case-grid,.news-list{grid-template-columns:1fr;}
  .trust-grid{grid-template-columns:1fr 1fr;}
  .service-detail{padding:22px;}
  .service-detail .head{align-items:flex-start;}
}