:root{
  --blue:#1e5eff; --blue-deep:#0f3fb0; --blue-soft:#eaf1ff;
  --slate:#334155; --slate-light:#64748b; --line:#e2e8f0;
  --bg:#f5f8ff; --white:#fff;
}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:"Microsoft YaHei","PingFang SC",Arial,sans-serif;color:var(--slate);line-height:1.7;background:var(--white)}
a{color:var(--blue);text-decoration:none}
img{max-width:100%;display:block}
.container{max-width:1200px;margin:0 auto;padding:0 20px}
h1,h2,h3{color:#0f2a5a;font-weight:700}

/* 顶部工具条 */
.topbar{background:var(--blue-deep);color:#fff;font-size:13px}
.topbar-inner{display:flex;justify-content:space-between;align-items:center;height:34px}
.topbar a{color:#fff}
.topbar-contact a{font-weight:600}

/* 主导航 */
.header{background:var(--white);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:100;box-shadow:0 1px 6px rgba(15,63,176,.06)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:70px}
.logo{display:flex;align-items:center;gap:12px;margin-right:20px}
.logo-img{height:46px;width:auto}
.logo-text{font-size:20px;font-weight:700;color:var(--blue-deep);white-space:nowrap}
.nav{display:flex;align-items:center;gap:4px}
.nav-link{font-size:17px;font-weight:600;color:var(--slate);padding:9px 14px;border-radius:8px;transition:.18s;white-space:nowrap}
.nav-link:hover{color:var(--blue);background:var(--blue-soft)}
.nav-link.active{color:var(--blue);background:var(--blue-soft)}
.nav-cta{background:var(--blue);color:#fff}
.nav-cta:hover{background:var(--blue-deep);color:#fff}

/* 横幅轮播 */
.hero{position:relative;overflow:hidden}
.hero-slide{position:absolute;inset:0;opacity:0;transition:opacity .8s;background-size:cover;background-position:center}
.hero-slide.active{opacity:1;position:relative}
.hero-slide .hero-mask{position:absolute;inset:0;background:linear-gradient(90deg,rgba(10,32,90,.82),rgba(10,32,90,.35));display:flex;align-items:center}
.hero-text{color:#fff;max-width:620px}
.hero-text h1{color:#fff;font-size:40px;margin-bottom:16px;line-height:1.25}
.hero-text p{font-size:18px;color:#e6eeff;margin-bottom:24px}
.hero-phones{font-size:19px;margin-bottom:26px;line-height:1.9}
.hero-phones strong{font-size:23px;color:#ffd54a}
.hero-btns{display:flex;gap:14px}
.btn{display:inline-flex;align-items:center;justify-content:center;padding:13px 30px;border-radius:8px;font-size:18px;font-weight:700;border:2px solid transparent;cursor:pointer;transition:.18s;background:none}
.btn-primary{background:var(--blue);color:#fff}
.btn-primary:hover{background:var(--blue-deep)}
.btn-outline{border-color:#fff;color:#fff}
.btn-outline:hover{background:rgba(255,255,255,.12)}
.hero-dots{position:absolute;bottom:18px;left:50%;transform:translateX(-50%);display:flex;gap:10px;z-index:5}
.hero-dots span{width:12px;height:12px;border-radius:50%;background:rgba(255,255,255,.5);cursor:pointer}
.hero-dots span.active{background:#fff}

/* 区块 */
.section{padding:52px 0}
.section.bg{background:var(--bg)}
.section-head{text-align:center;margin-bottom:34px}
.section-head h2{font-size:30px;margin-bottom:8px}
.section-head p{color:var(--slate-light);font-size:16px}

/* 首页服务网格 */
.grid-cards{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.grid-cards.sm{grid-template-columns:repeat(3,1fr)}
.card{background:var(--white);border:1px solid var(--line);border-radius:12px;padding:22px;transition:.2s;box-shadow:0 2px 8px rgba(15,63,176,.05)}
.card:hover{transform:translateY(-4px);box-shadow:0 10px 24px rgba(15,63,176,.12);border-color:var(--blue)}
.card .card-icon{font-size:30px;margin-bottom:10px}
.card h3{font-size:18px;margin-bottom:8px}
.card p{color:var(--slate-light);font-size:14px;margin-bottom:12px;min-height:44px}
.card-more{font-size:14px;font-weight:600}

/* 资质分类列表 */
.cat-list{display:flex;flex-direction:column;gap:14px}
.cat{background:var(--white);border:1px solid var(--line);border-radius:12px;overflow:hidden;transition:.2s}
.cat-head{display:flex;align-items:center;gap:14px;padding:18px 22px;cursor:pointer}
.cat-head .cat-icon{font-size:26px}
.cat-head .cat-name{font-size:19px;font-weight:700;color:#0f2a5a;flex:1}
.cat-head .cat-desc{color:var(--slate-light);font-size:13px;margin-left:12px}
.cat-head .cat-arrow{color:var(--slate-light);transition:.2s}
.cat.open .cat-arrow{transform:rotate(180deg)}
.cat-items{display:none;padding:0 22px 18px;border-top:1px dashed var(--line);background:#fbfcff;padding-top:14px}
.cat.open .cat-items{display:block}
.cat-items-wrap{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
.cat-item{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:11px 14px;border:1px solid var(--line);border-radius:8px;background:var(--white);transition:.15s}
.cat-item:hover{border-color:var(--blue);background:var(--blue-soft)}
.cat-item .ci-name{font-size:15px;color:var(--slate)}
.cat-item .ci-link{font-size:13px;color:var(--blue);font-weight:600;white-space:nowrap}

/* 服务详情 */
.svc-wrap{display:flex;gap:30px;align-items:flex-start}
.svc-img{width:377px;flex:0 0 377px;border-radius:12px;overflow:hidden;border:1px solid var(--line);background:var(--bg);align-self:stretch;display:flex;align-items:center;justify-content:center;min-height:533px}
.svc-img img{width:100%;height:100%;object-fit:cover}
.svc-main{flex:1;min-width:0}
.svc-main h1{font-size:28px;margin-bottom:14px}
.svc-body{background:var(--white);border:1px solid var(--line);border-radius:12px;padding:28px}
.svc-body p{margin-bottom:12px}
.svc-body ul{margin:0 0 14px 22px}
.svc-body li{margin-bottom:6px}
.svc-body strong{color:#0f2a5a}
.svc-siblings{margin-top:24px}
.svc-siblings h3{font-size:17px;margin-bottom:12px}
.svc-siblings a{display:inline-block;margin:0 8px 8px 0;padding:8px 16px;border:1px solid var(--line);border-radius:8px;font-size:14px;transition:.15s}
.svc-siblings a:hover{border-color:var(--blue);color:var(--blue);background:var(--blue-soft)}

/* 新闻 */
.news-list{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.news-item{background:var(--white);border:1px solid var(--line);border-radius:12px;padding:22px;transition:.2s}
.news-item:hover{border-color:var(--blue);box-shadow:0 8px 20px rgba(15,63,176,.10)}
.news-item .date{color:var(--slate-light);font-size:13px;margin-bottom:8px}
.news-item h3{font-size:18px;margin-bottom:10px}
.news-item p{color:var(--slate-light);font-size:14px}
.news-detail{max-width:860px;margin:0 auto}
.news-detail h1{font-size:28px;margin-bottom:8px}
.news-detail .meta{color:var(--slate-light);font-size:13px;margin-bottom:20px;border-bottom:1px solid var(--line);padding-bottom:16px}
.news-detail .content p{margin-bottom:12px}
.breadcrumb{color:var(--slate-light);font-size:14px;margin-bottom:18px}
.breadcrumb a{color:var(--slate-light)}
.breadcrumb a:hover{color:var(--blue)}

/* 公司介绍 */
.about-flex{display:flex;gap:34px;align-items:flex-start}
.about-flex .about-img{flex:0 0 420px;display:flex;flex-direction:column;gap:14px}
.about-flex .about-img img{border-radius:12px;border:1px solid var(--line)}
.about-text p{margin-bottom:14px;text-align:justify}
.about-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:30px}
.about-stat{background:var(--blue-soft);border-radius:12px;padding:20px;text-align:center}
.about-stat b{font-size:28px;color:var(--blue);display:block}
.about-stat span{color:var(--slate-light);font-size:13px}

/* 表单 */
.form-page{max-width:640px;margin:0 auto}
.form-card{background:var(--white);border:1px solid var(--line);border-radius:14px;padding:30px;box-shadow:0 4px 16px rgba(15,63,176,.06)}
.form-card h1{font-size:26px;margin-bottom:6px;text-align:center}
.form-card .sub{color:var(--slate-light);font-size:14px;text-align:center;margin-bottom:24px}
.field{margin-bottom:18px}
.field label{display:block;font-size:15px;font-weight:600;margin-bottom:7px;color:#0f2a5a}
.field input,.field select,.field textarea{width:100%;padding:12px 14px;border:2px solid var(--line);border-radius:8px;font-size:15px;font-family:inherit;transition:.15s;background:#fff}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--blue)}
.field textarea{min-height:120px;resize:vertical}
.field-row{display:flex;gap:12px}
.field-row .field{flex:1}
.btn-block{width:100%}
.form-msg{margin-top:14px;padding:12px;border-radius:8px;font-size:14px;text-align:center;display:none}
.form-msg.ok{display:block;background:#e6f7ec;color:#1a7f43;border:1px solid #b7e6c7}
.form-msg.err{display:block;background:#fdeaea;color:#c0392b;border:1px solid #f3c1c1}
.code-row{display:flex;gap:10px;align-items:flex-start}
.code-row .field{flex:1}
.code-btn{white-space:nowrap;padding:12px 18px;border:2px solid var(--blue);color:var(--blue);background:#fff;border-radius:8px;font-size:15px;font-weight:600;cursor:pointer}
.code-btn:disabled{opacity:.5;cursor:not-allowed}
.alt-link{text-align:center;margin-top:16px;font-size:14px;color:var(--slate-light)}

/* 搜索 */
.search-box{max-width:720px;margin:0 auto 30px;display:flex;gap:0}
.search-box input{flex:1;padding:13px 16px;border:5px solid var(--blue-deep);border-right:none;border-radius:10px 0 0 10px;font-size:16px}
.search-box input:focus{outline:none}
.search-box button{padding:0 28px;border:5px solid var(--blue-deep);background:var(--blue-deep);color:#fff;border-radius:0 10px 10px 0;font-size:17px;font-weight:700;cursor:pointer}
.search-result{background:var(--white);border:1px solid var(--line);border-radius:10px;padding:16px 20px;margin-bottom:12px;transition:.15s}
.search-result:hover{border-color:var(--blue);box-shadow:0 6px 16px rgba(15,63,176,.10)}
.search-result h3{font-size:17px;margin-bottom:4px}
.search-result p{color:var(--slate-light);font-size:14px;margin-bottom:6px}
.search-result .tag{font-size:12px;color:var(--blue);background:var(--blue-soft);padding:2px 8px;border-radius:4px}

/* 联系方式 */
.contact-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;margin-bottom:30px}
.contact-card{background:var(--white);border:1px solid var(--line);border-radius:12px;padding:22px}
.contact-card h3{font-size:18px;margin-bottom:12px;display:flex;align-items:center;gap:8px}
.contact-card .big{font-size:24px;color:var(--blue);font-weight:700}
.contact-addr{background:var(--bg);border-radius:12px;padding:22px;border:1px solid var(--line);margin-bottom:30px}
.contact-map{height:320px;border-radius:12px;overflow:hidden;border:1px solid var(--line);background:var(--blue-soft);display:flex;align-items:center;justify-content:center;color:var(--slate-light)}
.form-title{text-align:center;font-size:24px;margin:34px 0 8px;color:#0f2a5a}

/* 页脚 */
.footer{background:#0c2452;color:#c7d4ee;margin-top:50px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1.2fr 1fr;gap:30px;padding:42px 0 30px}
.footer-col h4{color:#fff;font-size:17px;margin-bottom:14px}
.footer-col ul{list-style:none}
.footer-col li{margin-bottom:9px;font-size:14px}
.footer-col a{color:#c7d4ee}
.footer-col a:hover{color:#fff}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);padding:16px 0;font-size:13px}
.footer-bottom .container{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:8px}
.footer-bottom a{color:#c7d4ee}

/* 右下悬浮微信窗 */
.float-qr{position:fixed;right:18px;bottom:90px;z-index:200;width:150px;background:#fff;border:2px solid var(--blue);border-radius:12px;box-shadow:0 12px 30px rgba(15,63,176,.22);overflow:hidden}
.float-qr-title{background:var(--blue);color:#fff;text-align:center;font-size:14px;font-weight:700;padding:8px 6px}
.float-qr-body{padding:12px 12px 10px}
.float-qr-item{margin-bottom:10px}
.float-qr-item:last-child{margin-bottom:0}
.float-qr-item img{width:100%;border-radius:6px;border:1px solid var(--line)}
.float-qr-label{text-align:center;font-size:12px;color:var(--slate);margin-top:4px;font-weight:600}

/* 404 */
.notfound{text-align:center;padding:90px 0}
.notfound h1{font-size:72px;color:var(--blue)}
.notfound p{color:var(--slate-light);margin:10px 0 24px}
.notfound .btn{display:inline-flex}

/* 响应式 */
@media(max-width:1024px){
  .grid-cards,.grid-cards.sm,.news-list{grid-template-columns:repeat(2,1fr)}
  .about-flex{flex-direction:column}
  .about-flex .about-img{flex:1 1 auto}
  .svc-wrap{flex-direction:column}
  .svc-img{width:100%;flex:0 0 auto;min-height:auto;max-height:420px}
}
@media(max-width:720px){
  .header-inner{flex-direction:column;height:auto;padding:14px 0;gap:12px}
  .nav{flex-wrap:wrap;justify-content:center}
  .nav-link{font-size:15px;padding:7px 10px}
  .grid-cards,.grid-cards.sm,.news-list,.contact-grid,.about-stats,.footer-grid{grid-template-columns:1fr}
  .hero-text h1{font-size:28px}
  .topbar-contact{display:none}
  .float-qr{width:120px}
  .field-row{flex-direction:column;gap:0}
}