:root{
  --blue:#2D5BFF;
  --blue-dark:#1E3FB0;
  --teal:#00C2A8;
  --ink:#0F172A;
  --gray:#5B6472;
  --line:#E6E9F0;
  --bg:#F7F9FC;
  --white:#FFFFFF;
  --radius:16px;
  --shadow:0 8px 30px rgba(15,23,42,.08);
  --maxw:1140px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:"PingFang SC","Microsoft YaHei","Source Han Sans SC",system-ui,sans-serif;
  color:var(--ink);background:var(--white);line-height:1.7;font-size:16px;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}

/* Header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:68px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px;letter-spacing:.5px}
.brand .logo{width:34px;height:34px;border-radius:9px;background:linear-gradient(135deg,var(--blue),var(--teal));display:flex;align-items:center;justify-content:center;color:#fff;font-size:18px}
.brand .logo-img{width:40px;height:40px;border-radius:10px;object-fit:contain;flex-shrink:0;display:block}
.brand small{display:block;font-size:11px;font-weight:500;color:var(--gray);letter-spacing:2px}
.menu{display:flex;gap:28px;align-items:center}
.menu a{font-size:15px;color:var(--gray);font-weight:500;transition:.2s}
.menu a:hover,.menu a.active{color:var(--blue)}
.btn{display:inline-block;padding:11px 22px;border-radius:10px;font-weight:600;font-size:15px;cursor:pointer;border:1px solid transparent;transition:.2s}
.btn-primary{background:var(--blue);color:#fff}
.btn-primary:hover{background:var(--blue-dark)}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--ink)}
.btn-ghost:hover{border-color:var(--blue);color:var(--blue)}
.btn-light{background:#fff;color:var(--blue)}

/* Hero */
.hero{background:radial-gradient(1200px 500px at 80% -10%,rgba(45,91,255,.12),transparent),linear-gradient(180deg,#fff,#F7F9FC);padding:84px 0 64px}
.hero h1{font-size:46px;line-height:1.2;font-weight:800;letter-spacing:-.5px;max-width:760px}
.hero h1 .hl{background:linear-gradient(120deg,var(--blue),var(--teal));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p{margin:22px 0 32px;font-size:18px;color:var(--gray);max-width:620px}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap}
.hero-tags{display:flex;gap:10px;margin-top:30px;flex-wrap:wrap}
.tag{background:#fff;border:1px solid var(--line);padding:7px 14px;border-radius:999px;font-size:13px;color:var(--gray);box-shadow:var(--shadow)}

/* Sections */
section{padding:72px 0}
.sec-head{text-align:center;max-width:680px;margin:0 auto 44px}
.sec-head .ey{color:var(--blue);font-weight:700;letter-spacing:2px;font-size:13px;text-transform:uppercase}
.sec-head h2{font-size:34px;font-weight:800;margin:10px 0 12px}
.sec-head p{color:var(--gray);font-size:16px}
.bg-soft{background:var(--bg)}

/* Grid cards */
.grid{display:grid;gap:22px}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-2{grid-template-columns:repeat(2,1fr)}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px;transition:.2s;box-shadow:0 2px 10px rgba(15,23,42,.04)}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#cdd6ff}
.card .ic{width:48px;height:48px;border-radius:12px;background:linear-gradient(135deg,rgba(45,91,255,.12),rgba(0,194,168,.12));display:flex;align-items:center;justify-content:center;font-size:24px;margin-bottom:16px}
.card h3{font-size:19px;margin-bottom:8px}
.card p{color:var(--gray);font-size:15px}
.card .more{display:inline-block;margin-top:14px;color:var(--blue);font-weight:600;font-size:14px}

/* 五大产品：带背景图的商品卡片 */
.product-card{position:relative;overflow:hidden;display:flex;flex-direction:column;padding:0!important;border:none;background:#fff;border-radius:16px;box-shadow:0 6px 22px rgba(20,40,80,.08)}
.product-card .pc-bg{position:relative;width:100%;height:210px;object-fit:cover;object-position:center;transition:transform .45s ease;z-index:0;border:0;display:block;flex:0 0 auto}
.product-card:hover .pc-bg{transform:scale(1.06)}
.product-card .pc-inner{position:relative;z-index:2;width:100%;padding:22px 24px 24px;background:#fff}
.product-card .ic{background:rgba(255,255,255,.7);border:1px solid rgba(20,40,80,.12);color:var(--blue);margin-bottom:14px}
.product-card h3{color:#1c2536}
.product-card p{color:#3b4759}
.product-card .more{color:var(--blue);margin-top:12px}

/* Feature list */
.feat{display:flex;gap:14px;padding:14px 0;border-bottom:1px dashed var(--line)}
.feat:last-child{border-bottom:none}
.feat .dot{width:26px;height:26px;border-radius:8px;background:var(--blue);color:#fff;display:flex;align-items:center;justify-content:center;font-size:14px;flex:0 0 auto;margin-top:2px}
.feat b{display:block;font-size:15px}
.feat span{color:var(--gray);font-size:14px}

/* Stats */
.stats{display:grid;grid-template-columns:repeat(5,1fr);gap:22px;text-align:center}
.stat .n{font-size:38px;font-weight:800;background:linear-gradient(120deg,var(--blue),var(--teal));-webkit-background-clip:text;background-clip:text;color:transparent}
.stat .l{color:var(--gray);font-size:14px;margin-top:4px}

/* Cases */
.case{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.case .top{height:120px;background:linear-gradient(135deg,var(--blue),var(--teal));display:flex;align-items:flex-end;padding:16px;color:#fff;font-weight:700;font-size:18px}
.case .body{padding:18px}
.case .body .meta{font-size:13px;color:var(--gray);margin-bottom:6px}
.case .body p{font-size:14px;color:var(--gray)}

/* News */
.news{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.news .item{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:#fff}
.news .cover{height:150px;background:linear-gradient(135deg,#eef2ff,#e6fbf6)}
.news .body{padding:16px}
.news .cat{font-size:12px;color:var(--teal);font-weight:700}
.news .body h4{font-size:16px;margin:6px 0}
.news .body .date{font-size:13px;color:var(--gray)}

/* CTA band */
.cta-band{background:linear-gradient(120deg,var(--blue),var(--teal));color:#fff;border-radius:24px;padding:48px;text-align:center;margin:0 24px}
.cta-band h2{font-size:30px;margin-bottom:12px}
.cta-band p{opacity:.92;margin-bottom:24px}

/* Footer */
footer{background:var(--ink);color:#cbd5e1;padding:54px 0 26px;margin-top:30px}
.foot{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:30px}
footer h4{color:#fff;font-size:15px;margin-bottom:14px}
footer a{color:#cbd5e1;font-size:14px;display:block;padding:4px 0}
footer a:hover{color:#fff}
footer .small{font-size:13px;color:#94a3b8;margin-top:8px}
.foot-bottom{border-top:1px solid #1f2a3d;margin-top:34px;padding-top:18px;font-size:13px;color:#94a3b8;display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px}

/* Contact form */
.form{display:grid;gap:16px;max-width:560px}
.form label{font-size:14px;font-weight:600}
.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}
.form input:focus,.form select:focus,.form textarea:focus{outline:none;border-color:var(--blue)}
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:start}
.info-box{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px}
.info-box .row{display:flex;gap:12px;padding:12px 0;border-bottom:1px dashed var(--line)}
.info-box .row:last-child{border-bottom:none}
.info-box .row b{width:72px;flex:0 0 auto;color:var(--ink)}

/* breadcrumb */
.crumb{font-size:13px;color:var(--gray);padding:18px 0}
.crumb a:hover{color:var(--blue)}

/* Certificates */
.cert-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.cert-item{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:0 2px 10px rgba(15,23,42,.04)}
.cert-img{width:100%;height:260px;object-fit:cover;background:var(--bg)}
.cert-body{padding:16px}
.cert-body h4{font-size:15px;margin-bottom:6px}
.cert-body p{font-size:13px;color:var(--gray);margin:0}
.cert-meta{display:inline-block;background:#eef2ff;color:var(--blue);font-size:12px;font-weight:600;padding:4px 10px;border-radius:6px;margin-bottom:8px}
@media(max-width:900px){.cert-grid{grid-template-columns:1fr 1fr}}
@media(max-width:560px){.cert-grid{grid-template-columns:1fr}}

/* Scene showcase */
.scene-showcase{border-radius:var(--radius);overflow:hidden;background:#fff;box-shadow:var(--shadow)}
.scene-showcase img{width:100%;height:auto;display:block;object-fit:cover;max-height:520px}
.scene-caption{padding:20px 26px;background:#fff}
.scene-caption .tag{font-size:12px;color:var(--blue);font-weight:700;letter-spacing:1px;margin-bottom:4px}
.scene-caption h4{margin:0 0 6px;font-size:20px}
.scene-caption p{margin:0;color:var(--gray);font-size:14px}
.scene-row{display:grid;grid-template-columns:1.1fr .9fr;gap:28px;align-items:center}
.scene-row.reverse{grid-template-columns:.9fr 1.1fr}
.scene-text .ey{color:var(--blue);font-weight:700;letter-spacing:2px;font-size:13px}
.scene-text h3{font-size:30px;margin:10px 0 16px}
.scene-text p{color:var(--gray);font-size:16px;margin-bottom:12px}
.scene-text ul{list-style:none;margin-top:18px}
.scene-text li{display:flex;gap:10px;padding:8px 0;color:var(--gray);font-size:15px}
.scene-text li::before{content:"✓";color:var(--teal);font-weight:700}

@media(max-width:900px){
  .scene-row,.scene-row.reverse{grid-template-columns:1fr}
  .grid-3,.grid-2,.news,.stats{grid-template-columns:1fr 1fr}
  .foot{grid-template-columns:1fr 1fr}
  .contact-grid{grid-template-columns:1fr}
  .hero h1{font-size:34px}
  .menu{display:none}
}
@media(max-width:560px){
  .grid-3,.grid-2,.news,.stats{grid-template-columns:1fr}
  .foot{grid-template-columns:1fr}
  .cta-band{padding:32px 20px}
}

/* 全国合作商场 Top30 网格 */
.mall-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:12px}
.mall-card{display:flex;align-items:center;gap:10px;padding:13px 16px;background:#fff;border:1px solid #eef1f6;border-radius:12px;font-size:14px}
.mall-card .rk{display:inline-flex;align-items:center;justify-content:center;min-width:24px;height:24px;border-radius:7px;background:#eef2ff;color:#2D5BFF;font-weight:800;font-size:13px}
.mall-card.top3 .rk{background:linear-gradient(135deg,#2D5BFF,#00C2A8);color:#fff}
.mall-card b{color:#1c2536}
.mall-card .vol{margin-left:auto;color:#00a98e;font-size:12px;font-weight:600;white-space:nowrap}
@media(max-width:560px){.mall-grid{grid-template-columns:1fr 1fr}.mall-card .vol{font-size:11px}}

/* 全国合作商场 图片网格 */
.mall-photo-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:22px}
.mall-photo{position:relative;overflow:hidden;border-radius:12px}
.mall-photo img{display:block;width:100%;aspect-ratio:3/2;object-fit:cover;background:#eef1f6;transition:transform .3s ease}
.mall-photo:hover img{transform:scale(1.05)}
.mall-photo:hover{box-shadow:0 10px 24px rgba(20,40,80,.16)}
.mall-photo .cap{position:absolute;left:0;right:0;bottom:0;padding:14px 12px 10px;color:#fff;font-weight:600;font-size:15px;text-align:left;background:linear-gradient(to top,rgba(8,16,34,.78),rgba(8,16,34,0));border-radius:0 0 12px 12px;text-shadow:0 1px 3px rgba(0,0,0,.4)}
@media(max-width:900px){.mall-photo-grid{grid-template-columns:repeat(3,1fr);gap:16px}}
@media(max-width:560px){.mall-photo-grid{grid-template-columns:repeat(2,1fr);gap:14px}.mall-photo .cap{font-size:13px;padding:10px 9px 8px}}