:root{
  --blue:#174a85; --blue-2:#2f6fd0; --blue-light:#eef3f9;
  --gray:#666; --ink:#222; --line:#e5e5e5; --bg:#fff;
}
*{margin:0;padding:0;box-sizing:border-box;}
body{font-family:"Microsoft YaHei","PingFang SC",system-ui,sans-serif;color:var(--ink);background:var(--bg);line-height:1.7;}
a{color:inherit;text-decoration:none;}
.wrap{max-width:1120px;margin:0 auto;padding:0 20px;}
.section{padding:60px 0;}
.section h2{font-size:30px;margin-bottom:8px;}
.sub{color:var(--gray);margin-bottom:32px;font-size:16px;}

/* 顶部导航 */
.nav{position:sticky;top:0;z-index:50;background:#fff;border-bottom:1px solid var(--line);}
.nav .wrap{display:flex;align-items:center;justify-content:space-between;height:64px;}
.logo{display:flex;align-items:center;gap:10px;font-size:22px;font-weight:bold;color:var(--blue);letter-spacing:1px;}
.logo img{height:34px;width:auto;}
.nav-links{display:flex;gap:28px;font-size:15px;}
.nav-links a{cursor:pointer;color:var(--ink);transition:color .2s;}
.nav-links a:hover{color:var(--blue);}

/* 视图切换 */
.view{display:none;}
.view.active{display:block;}
.back-btn{display:inline-flex;align-items:center;gap:6px;margin:24px 0 18px;color:var(--blue);cursor:pointer;font-size:15px;border:1px solid var(--line);padding:7px 16px;border-radius:6px;background:#fff;transition:.2s;}
.back-btn:hover{background:var(--blue-light);}
.crumb{color:var(--gray);font-size:14px;margin-bottom:6px;}

/* Hero 轮播 */
.hero{position:relative;height:340px;overflow:hidden;background:var(--blue);}
.slides{position:relative;height:100%;}
.slide{position:absolute;inset:0;opacity:0;transition:opacity .8s;background-size:cover;background-position:center;}
.slide.active{opacity:1;}
.slide::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(10,30,60,.72),rgba(10,30,60,.25));}
.slide .cap{position:absolute;left:0;bottom:0;z-index:2;padding:0 20px 38px;max-width:760px;color:#fff;}
.slide .cap h1{font-size:32px;margin-bottom:10px;text-shadow:0 2px 8px rgba(0,0,0,.3);}
.slide .cap p{font-size:16px;opacity:.95;}
.hero-cta{display:inline-block;margin-top:20px;background:#fff;color:var(--blue);padding:11px 28px;border-radius:6px;font-weight:bold;}
.arrow{position:absolute;top:50%;transform:translateY(-50%);z-index:3;background:rgba(255,255,255,.25);border:none;color:#fff;font-size:28px;width:46px;height:46px;border-radius:50%;cursor:pointer;}
.arrow.prev{left:18px;} .arrow.next{right:18px;}
.dots{position:absolute;bottom:18px;left:50%;transform:translateX(-50%);z-index:3;display:flex;gap:8px;}
.dots span{width:10px;height:10px;border-radius:50%;background:rgba(255,255,255,.5);cursor:pointer;}
.dots span.on{background:#fff;}

/* 首页简介块 */
.intro{text-align:center;max-width:840px;margin:0 auto;}
.intro p{color:var(--gray);font-size:17px;}
/* 首页业务板块加浅底衬托，提升分量 */
#homeCatalog{background:var(--blue-light);}

/* 分组卡片（一级） */
.groups-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;}
.group-card{background:#fff;border:1px solid var(--line);border-radius:12px;padding:30px 22px;min-height:152px;text-align:center;cursor:pointer;transition:.22s;display:flex;flex-direction:column;justify-content:center;}
.group-card:hover{transform:translateY(-4px);box-shadow:0 10px 28px rgba(23,74,133,.12);border-color:var(--blue-2);}
.group-card .ic{width:64px;height:64px;margin:0 auto 14px;display:flex;align-items:center;justify-content:center;background:var(--blue-light);border-radius:14px;color:var(--blue);font-size:26px;font-weight:bold;overflow:hidden;}
.group-card .ic img{width:100%;height:100%;object-fit:cover;}
.group-card h3{font-size:20px;margin-bottom:6px;}
.group-card .cnt{color:var(--gray);font-size:14px;}

/* 服务项卡片（二级） */
.items-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;}
.item-card{background:#fff;border:1px solid var(--line);border-radius:10px;overflow:hidden;cursor:pointer;transition:.22s;}
.item-card:hover{transform:translateY(-3px);box-shadow:0 8px 22px rgba(23,74,133,.1);}
.item-card .thumb{width:100%;height:150px;object-fit:cover;background:var(--blue-light);}
.item-card .meta{padding:12px 14px;}
.item-card .meta .nm{font-size:15px;font-weight:bold;line-height:1.4;height:42px;overflow:hidden;}
.item-card .meta .pr{color:#c0392b;font-weight:bold;margin-top:6px;font-size:15px;}

/* 项目详情（三级） */
.detail-head{display:flex;gap:24px;align-items:flex-start;flex-wrap:wrap;}
.detail-head img.cover{width:240px;height:240px;object-fit:cover;border-radius:10px;border:1px solid var(--line);}
.detail-head .info{flex:1;min-width:260px;}
.detail-head h2{font-size:26px;margin-bottom:12px;}
.price-badge{display:inline-block;background:#fff3f0;color:#c0392b;font-size:22px;font-weight:bold;padding:8px 18px;border-radius:8px;margin-bottom:10px;}
.detail-id{color:var(--gray);font-size:14px;margin-bottom:16px;}
.detail-imgs{margin-top:28px;display:flex;flex-direction:column;gap:18px;}
.detail-imgs img{width:100%;border:1px solid var(--line);border-radius:8px;}
.cta-go{display:inline-block;margin-top:26px;background:var(--blue);color:#fff;padding:14px 34px;border-radius:8px;font-weight:bold;font-size:16px;}
.cta-go:hover{background:var(--blue-2);}
.cta-sub{display:inline-block;margin-top:12px;color:var(--blue);font-size:14px;cursor:pointer;}
.cta-sub:hover{text-decoration:underline;}

/* 小程序码弹窗 */
.modal{position:fixed;inset:0;z-index:100;display:none;align-items:center;justify-content:center;background:rgba(0,0,0,.55);}
.modal.open{display:flex;}
.modal .box{background:#fff;width:340px;max-width:90vw;border-radius:14px;padding:26px 24px 20px;text-align:center;position:relative;box-shadow:0 20px 60px rgba(0,0,0,.3);}
.modal .box h3{font-size:19px;margin-bottom:6px;color:var(--blue);}
.modal .box p{font-size:14px;color:var(--gray);margin-bottom:16px;}
.modal .box img{width:220px;height:220px;object-fit:contain;border-radius:8px;background:var(--blue-light);}
.modal .box .ph{width:220px;height:220px;margin:0 auto;display:none;align-items:center;justify-content:center;background:var(--blue-light);border:1px dashed var(--line);border-radius:8px;color:var(--gray);font-size:14px;line-height:1.6;}
.modal .close{position:absolute;top:8px;right:14px;font-size:26px;color:var(--gray);cursor:pointer;line-height:1;}
.modal .hint{margin-top:14px;font-size:12px;color:#999;}

/* 关于促苗 */
.about{background:var(--blue-light);}
.about .wrap{max-width:840px;text-align:center;}
.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:34px;}
.stat{background:#fff;border-radius:10px;padding:22px;}
.stat .num{font-size:30px;font-weight:bold;color:var(--blue);}
.stat .lb{color:var(--gray);font-size:14px;margin-top:6px;}

/* 联系我们 */
.contact{background:var(--blue-light);}
.ch-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px;margin-bottom:30px;}
.ch-card{background:#fff;border:1px solid var(--line);border-radius:10px;padding:22px;text-align:center;}
.ch-card h3{font-size:18px;margin-bottom:8px;}
.ch-card p{font-size:13px;color:var(--gray);margin-bottom:14px;}
.qr-img{width:140px;height:140px;display:block;margin:0 auto 12px;}
.ch-btn{display:inline-block;background:var(--blue);color:#fff;padding:9px 22px;border-radius:6px;font-size:14px;font-weight:bold;}
.contact-box{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:10px;padding:28px;}
.info p{margin-bottom:10px;font-size:15px;}
.info .label{color:var(--gray);display:inline-block;width:72px;}

/* 页脚 */
.footer{background:#16314f;color:#cdd9e8;padding:30px 0;font-size:14px;text-align:center;}
.footer a{color:#9fc0e8;}

@media(max-width:900px){
  .groups-grid,.items-grid{grid-template-columns:repeat(2,1fr);}
  .stats{grid-template-columns:1fr;}
  .ch-grid,.contact-box{grid-template-columns:1fr;}
  .slide .cap h1{font-size:26px;}
  .hero{height:260px;}
}