:root{
  --brand:#e8412c; --brand-d:#c5321f; --brand2:#ff8a3c;
  --ink:#1f2430; --sub:#5b6472; --line:#e7e9ee; --bg:#f6f7f9;
  --card:#ffffff; --accent:#1f6feb; --soft:#eef3ff; --ok:#1f9d55;
  --shadow:0 1px 3px rgba(20,30,50,.06),0 6px 18px rgba(20,30,50,.05);
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{margin:0;font-family:-apple-system,"PingFang SC","Microsoft YaHei",Segoe UI,sans-serif;
  color:var(--ink);background:var(--bg);line-height:1.75;font-size:15px;-webkit-font-smoothing:antialiased;}
a{color:var(--accent);text-decoration:none;}
img{max-width:100%;display:block;}
.wrap{max-width:1120px;margin:0 auto;padding:0 18px;}
.container{max-width:1120px;margin:0 auto;padding:0 18px;}

/* header */
.site-header{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:50;}
.nav{display:flex;align-items:center;justify-content:space-between;height:62px;}
.logo{font-weight:800;font-size:19px;color:var(--ink);display:flex;align-items:center;gap:8px;}
.logo .dot{width:10px;height:10px;border-radius:50%;background:var(--brand);display:inline-block;}
.logo small{font-weight:500;color:var(--sub);font-size:12px;margin-left:2px;}
.nav-links{display:flex;gap:26px;align-items:center;}
.nav-links a{color:var(--sub);font-size:15px;font-weight:500;padding:4px 0;}
.nav-links a:hover,.nav-links a.active{color:var(--brand);}
.nav-cta{background:var(--brand);color:#fff!important;padding:8px 16px!important;border-radius:24px;font-weight:600;}
.nav-cta:hover{background:var(--brand-d);}
.menu-toggle{display:none;background:none;border:none;font-size:24px;cursor:pointer;color:var(--ink);}
@media(max-width:860px){
  .nav-links{position:absolute;top:62px;left:0;right:0;background:#fff;border-bottom:1px solid var(--line);
    flex-direction:column;gap:0;padding:8px 18px 16px;display:none;}
  .nav-links.open{display:flex;}
  .nav-links a{padding:12px 0;border-bottom:1px solid var(--line);}
  .menu-toggle{display:block;}
}

/* hero */
.hero{background:linear-gradient(135deg,#e8412c 0%,#ff7a3c 55%,#ffb43a 100%);color:#fff;padding:60px 0 54px;}
.hero h1{font-size:38px;margin:0 0 14px;line-height:1.25;letter-spacing:.5px;}
.hero p.lead{font-size:17px;opacity:.96;max-width:680px;margin:0 0 10px;}
.hero .sub{font-size:14px;opacity:.85;margin-bottom:26px;}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap;margin-top:8px;}
.btn{display:inline-block;padding:13px 26px;border-radius:30px;font-weight:700;font-size:15px;transition:.18s;}
.btn-primary{background:#fff;color:var(--brand);}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 20px rgba(0,0,0,.15);}
.btn-ghost{border:2px solid rgba(255,255,255,.7);color:#fff;}
.btn-ghost:hover{background:rgba(255,255,255,.15);}
.hero-tags{margin-top:24px;display:flex;gap:10px;flex-wrap:wrap;}
.hero-tags span{background:rgba(255,255,255,.18);border:1px solid rgba(255,255,255,.35);padding:5px 13px;border-radius:20px;font-size:13px;}

/* stats strip */
.stats{background:#fff;border-bottom:1px solid var(--line);}
.stats .grid{display:grid;grid-template-columns:repeat(5,1fr);gap:0;}
.stat{padding:22px 14px;text-align:center;border-right:1px solid var(--line);}
.stat:last-child{border-right:none;}
.stat b{display:block;font-size:26px;color:var(--brand);line-height:1.2;}
.stat span{font-size:13px;color:var(--sub);}
@media(max-width:760px){.stats .grid{grid-template-columns:repeat(2,1fr);} .stat{border-right:none;border-bottom:1px solid var(--line);}}

/* sections */
section.block{padding:54px 0;}
.sec-head{margin-bottom:26px;}
.sec-head h2{font-size:27px;margin:0 0 8px;display:flex;align-items:center;gap:10px;}
.sec-head h2::before{content:"";width:6px;height:26px;background:var(--brand);border-radius:3px;display:inline-block;}
.sec-head p{color:var(--sub);margin:0;font-size:15px;}

/* cards */
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:20px;box-shadow:var(--shadow);}
.grid{display:grid;gap:18px;}
.grid-2{grid-template-columns:repeat(2,1fr);}
.grid-3{grid-template-columns:repeat(3,1fr);}
.grid-4{grid-template-columns:repeat(4,1fr);}
@media(max-width:900px){.grid-3,.grid-4{grid-template-columns:repeat(2,1fr);}}
@media(max-width:600px){.grid-2,.grid-3,.grid-4{grid-template-columns:1fr;}}

/* category / product cards */
.cat-card{overflow:hidden;transition:.18s;}
.cat-card:hover{transform:translateY(-4px);box-shadow:0 10px 28px rgba(20,30,50,.12);}
.cat-card img{width:100%;height:170px;object-fit:cover;background:#f0f2f5;}
.cat-card .body{padding:16px 18px 18px;}
.cat-card h3{margin:0 0 6px;font-size:18px;}
.cat-card .tag{display:inline-block;font-size:12px;color:var(--brand);background:#fff1ee;border:1px solid #ffd2c8;padding:2px 9px;border-radius:20px;margin-bottom:8px;}
.cat-card p{margin:6px 0 10px;color:var(--sub);font-size:14px;}
.cat-card .more{font-weight:600;color:var(--brand);font-size:14px;}

.prod{border:1px solid var(--line);border-radius:14px;overflow:hidden;background:#fff;box-shadow:var(--shadow);transition:.18s;}
.prod:hover{transform:translateY(-4px);}
.prod img{width:100%;height:200px;object-fit:cover;background:#f0f2f5;}
.prod .body{padding:16px 18px 18px;}
.prod h3{margin:0 0 6px;font-size:17px;}
.prod .meta{font-size:13px;color:var(--sub);margin:4px 0;}
.prod .price{color:var(--brand);font-weight:800;font-size:17px;margin:8px 0 4px;}
.prod .price small{font-weight:500;color:var(--sub);font-size:12px;}
.prod .moq{display:inline-block;background:var(--soft);color:var(--accent);border:1px solid #d6e2ff;padding:2px 10px;border-radius:6px;font-size:12px;margin-top:4px;}

/* feature list */
.feat{display:flex;gap:14px;align-items:flex-start;padding:14px 0;border-bottom:1px dashed var(--line);}
.feat:last-child{border-bottom:none;}
.feat .ic{flex:0 0 40px;height:40px;border-radius:10px;background:#fff1ee;color:var(--brand);
  display:flex;align-items:center;justify-content:center;font-size:20px;font-weight:800;}
.feat h4{margin:0 0 3px;font-size:15px;}
.feat p{margin:0;font-size:14px;color:var(--sub);}

/* table */
.table-wrap{overflow-x:auto;background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow);}
table{width:100%;border-collapse:collapse;font-size:14px;min-width:560px;}
th,td{border-bottom:1px solid var(--line);padding:11px 13px;text-align:left;vertical-align:top;}
th{background:#f0f2f5;font-weight:600;}
tr:last-child td{border-bottom:none;}

/* faq */
.faq-item{border:1px solid var(--line);border-radius:12px;margin:10px 0;background:#fff;overflow:hidden;}
.faq-q{padding:15px 18px;font-weight:600;cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:10px;}
.faq-q .pm{color:var(--brand);font-size:20px;transition:.2s;}
.faq-a{padding:0 18px 16px;color:var(--sub);font-size:14px;display:none;}
.faq-item.open .faq-a{display:block;}
.faq-item.open .faq-q .pm{transform:rotate(45deg);}

/* cta band */
.cta-band{background:linear-gradient(135deg,#1f2430,#333b4d);color:#fff;border-radius:16px;padding:34px 30px;text-align:center;margin:10px 0;}
.cta-band h2{margin:0 0 8px;color:#fff;font-size:24px;}
.cta-band p{margin:0 0 18px;opacity:.9;}
.cta-band .btn-primary{background:var(--brand);color:#fff;}
.cta-band .btn-primary:hover{background:var(--brand-d);}

/* breadcrumb */
.crumb{font-size:13px;color:var(--sub);padding:16px 0 0;}
.crumb a{color:var(--sub);}

/* footer */
.site-footer{background:#1f2430;color:#cdd3de;padding:40px 0 26px;margin-top:30px;font-size:14px;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:26px;}
.site-footer h4{color:#fff;font-size:15px;margin:0 0 12px;}
.site-footer a{color:#cdd3de;display:block;margin:6px 0;font-size:13.5px;}
.site-footer a:hover{color:#fff;}
.footer-bottom{border-top:1px solid #333b4d;margin-top:26px;padding-top:16px;font-size:12.5px;color:#8b93a3;}

/* wechat float */
.wx-float{position:fixed;right:20px;bottom:24px;z-index:90;display:flex;flex-direction:column;align-items:center;gap:10px;}
.wx-btn{width:56px;height:56px;border-radius:50%;background:var(--ok);color:#fff;display:flex;align-items:center;justify-content:center;font-size:26px;box-shadow:0 6px 18px rgba(31,157,85,.45);cursor:pointer;border:none;animation:pulse 2.2s infinite;}
@keyframes pulse{0%{box-shadow:0 0 0 0 rgba(31,157,85,.5);}70%{box-shadow:0 0 0 14px rgba(31,157,85,0);}100%{box-shadow:0 0 0 0 rgba(31,157,85,0);}}
.wx-panel{display:none;background:#fff;border:1px solid var(--line);border-radius:14px;padding:16px;width:240px;box-shadow:0 10px 30px rgba(0,0,0,.18);text-align:center;}
.wx-panel.show{display:block;}
.wx-panel img{width:150px;height:150px;margin:8px auto;background:#f0f2f5;border-radius:8px;object-fit:contain;}
.wx-panel .id{font-weight:800;color:var(--ink);font-size:16px;}
.wx-panel .tip{font-size:12px;color:var(--sub);margin:4px 0 0;}

/* form */
.field{margin:14px 0;}
.field label{display:block;font-weight:600;margin-bottom:6px;font-size:14px;}
.field input,.field select,.field textarea{width:100%;padding:11px 13px;border:1px solid var(--line);border-radius:10px;font-size:14px;font-family:inherit;background:#fff;}
.field textarea{resize:vertical;min-height:90px;}
.submit{background:var(--brand);color:#fff;border:none;padding:13px 26px;border-radius:28px;font-weight:700;font-size:15px;cursor:pointer;width:100%;}
.submit:hover{background:var(--brand-d);}
.note{background:#eef7f0;border:1px solid #cfe9d6;color:#1f7a45;padding:12px 14px;border-radius:10px;font-size:14px;margin:14px 0;}
.warn{background:#fdeeee;border:1px solid #f6caca;color:#b3261e;padding:12px 14px;border-radius:10px;font-size:14px;margin:14px 0;}

.pill{display:inline-block;background:var(--soft);color:var(--accent);border:1px solid #d6e2ff;padding:3px 11px;border-radius:20px;font-size:13px;margin:3px 4px 3px 0;}
.img-note{font-size:12px;color:var(--sub);text-align:center;margin-top:6px;}
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:26px;align-items:center;}
@media(max-width:800px){.two-col{grid-template-columns:1fr;}}
.step{display:flex;gap:14px;margin:12px 0;}
.step .n{flex:0 0 34px;height:34px;border-radius:50%;background:var(--brand);color:#fff;font-weight:800;display:flex;align-items:center;justify-content:center;}

/* SKU 色块封面（品类级标识，避免图文不符） */
.prod .pimg{height:120px;display:flex;flex-direction:column;align-items:center;justify-content:center;color:#fff;gap:4px;}
.prod .pimg b{font-size:30px;font-weight:400;line-height:1;}
.prod .pimg span{font-size:12.5px;font-weight:700;letter-spacing:1px;}