:root{
  --blue:#1f6feb; --blue-d:#155bb5; --blue-l:#e8f1ff;
  --ink:#1f2733; --sub:#5b6675; --line:#e6e9ef; --bg:#f5f7fa; --card:#fff;
  --radius:10px; --maxw:1200px; --shadow:0 4px 18px rgba(20,40,80,.08);
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{font-family:"PingFang SC","Microsoft YaHei","Segoe UI",Roboto,Helvetica,Arial,sans-serif;color:var(--ink);background:var(--bg);font-size:15px;line-height:1.7;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 16px}
.btn{display:inline-block;background:var(--blue);color:#fff;padding:11px 26px;border-radius:6px;font-weight:600;transition:.2s;border:1px solid var(--blue)}
.btn:hover{background:var(--blue-d)}
.btn.ghost{background:#fff;color:var(--blue);border:1px solid var(--blue)}
.section{padding:54px 0}
.section h2{font-size:28px;margin:0 0 6px;font-weight:700}
.section .sub{color:var(--sub);margin:0 0 30px}
.center{text-align:center}

/* ---------- top bar ---------- */
.topbar{background:#0e1b33;color:#cdd6e6;font-size:13px}
.topbar .wrap{display:flex;justify-content:space-between;align-items:center;height:38px}
.topbar a{color:#cdd6e6;margin-left:16px}
.topbar a:hover{color:#fff}

/* ---------- header ---------- */
.header{background:#fff;border-bottom:1px solid var(--line)}
.header .wrap{display:flex;align-items:center;justify-content:space-between;height:78px}
.logo{display:flex;align-items:center;gap:12px}
.logo img{height:60px;width:auto}
.logo .name{font-size:20px;font-weight:700;line-height:1.15}
.logo .name small{display:block;font-size:11px;color:var(--sub);font-weight:400;letter-spacing:.5px}
.nav{display:flex;gap:6px}
.nav a{padding:10px 14px;font-size:15px;border-radius:6px;font-weight:500}
.nav a:hover,.nav a.active{color:var(--blue);background:var(--blue-l)}
.head-cta{display:flex;gap:10px;align-items:center}

/* ---------- hero / carousel ---------- */
.hero{position:relative;overflow:hidden;background:#0b1830}
.slides{position:relative;height:460px}
.slide{position:absolute;inset:0;opacity:0;transition:opacity .6s}
.slide.active{opacity:1}
.slide img{width:100%;height:100%;object-fit:cover}
.slide .cap{position:absolute;left:8%;top:50%;transform:translateY(-50%);color:#fff;max-width:560px;text-shadow:0 2px 12px rgba(0,0,0,.5)}
.slide .cap h1{font-size:40px;margin:0 0 14px;font-weight:800}
.slide .cap p{font-size:17px;margin:0 0 22px;opacity:.95}
.dots{position:absolute;bottom:18px;left:50%;transform:translateX(-50%);display:flex;gap:10px}
.dots span{width:11px;height:11px;border-radius:50%;background:rgba(255,255,255,.5);cursor:pointer}
.dots span.on{background:#fff;width:26px;border-radius:6px}

/* ---------- feature strip ---------- */
.feat{background:var(--blue);color:#fff}
.feat .wrap{display:flex;flex-wrap:wrap;justify-content:space-around;padding:26px 16px;gap:18px;text-align:center}
.feat .it b{display:block;font-size:26px}
.feat .it span{opacity:.9;font-size:14px}

/* ---------- cards / grid ---------- */
.grid{display:grid;gap:24px}
.grid.c3{grid-template-columns:repeat(3,1fr)}
.grid.c4{grid-template-columns:repeat(4,1fr)}
.grid.c2{grid-template-columns:repeat(2,1fr)}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:.2s;box-shadow:var(--shadow)}
.card:hover{transform:translateY(-4px);box-shadow:0 10px 28px rgba(20,40,80,.14)}
.card .ph{height:200px;background:var(--bg);overflow:hidden}
.card .ph img{width:100%;height:100%;object-fit:cover}
.card .bd{padding:16px 18px}
.card .bd h3{font-size:16px;margin:0 0 8px;line-height:1.4}
.card .bd .tag{display:inline-block;background:var(--blue-l);color:var(--blue);font-size:12px;padding:3px 10px;border-radius:20px;margin-bottom:10px}

/* ---------- category blocks ---------- */
.catblock{display:grid;grid-template-columns:1.1fr 1fr;gap:0;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;margin-bottom:26px;background:#fff}
.catblock .pic{overflow:hidden}
.catblock .pic img{width:100%;height:100%;object-fit:cover;min-height:320px}
.catblock .info{padding:40px}
.catblock .info h3{font-size:24px;margin:0 0 6px}
.catblock .info .en{color:var(--blue);font-weight:600;letter-spacing:1px;font-size:13px}
.catblock .info p{color:var(--sub);margin:14px 0 20px}
.catlist{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px}
.catlist a{font-size:13px;background:var(--bg);border:1px solid var(--line);padding:6px 12px;border-radius:20px;color:var(--sub)}
.catlist a:hover{color:var(--blue);border-color:var(--blue)}

/* ---------- breadcrumb ---------- */
.crumb{background:#fff;border-bottom:1px solid var(--line);padding:14px 0;font-size:13px;color:var(--sub)}
.crumb a:hover{color:var(--blue)}

/* ---------- product detail ---------- */
.pd{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:start}
.pd .gallery .main{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:#fff}
.pd .gallery .main img{width:100%;height:380px;object-fit:cover}
.pd .thumbs{display:flex;gap:10px;margin-top:12px}
.pd .thumbs img{width:74px;height:74px;object-fit:cover;border:1px solid var(--line);border-radius:8px;cursor:pointer}
.pd .thumbs img.on{border-color:var(--blue)}
.pd .info h1{font-size:28px;margin:0 0 8px}
.pd .info .brand{color:var(--blue);font-weight:600;margin-bottom:16px}
.pd .attrs{background:var(--blue-l);border-radius:8px;padding:14px 18px;margin:18px 0}
.pd .attrs div{display:flex;justify-content:space-between;padding:6px 0;border-bottom:1px dashed #cfe0ff;font-size:14px}
.pd .attrs div:last-child{border:0}
.pd .attrs div span:first-child{color:var(--sub)}
.pd .buy{display:flex;gap:12px;margin-top:18px}
.spec-table{width:100%;border-collapse:collapse;margin-top:14px}
.spec-table th,.spec-table td{border:1px solid var(--line);padding:10px 14px;font-size:14px;text-align:left}
.spec-table th{background:var(--bg);width:30%;color:var(--sub)}
.tabs{display:flex;gap:8px;border-bottom:2px solid var(--line);margin:30px 0 18px}
.tabs button{background:none;border:0;padding:10px 18px;font-size:15px;cursor:pointer;color:var(--sub);font-weight:600;border-bottom:2px solid transparent;margin-bottom:-2px}
.tabs button.on{color:var(--blue);border-color:var(--blue)}
.tabpane{display:none}.tabpane.on{display:block}
.tabs-content p{color:var(--sub);margin:0 0 12px}

/* ---------- forms ---------- */
.form{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px;max-width:520px;box-shadow:var(--shadow)}
.form label{display:block;font-size:14px;margin:14px 0 6px;font-weight:600}
.form input,.form textarea,.form select{width:100%;padding:11px 12px;border:1px solid var(--line);border-radius:6px;font-size:14px;font-family:inherit}
.form textarea{resize:vertical;min-height:110px}
.form .row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.auth{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:start}
.auth .side{background:linear-gradient(135deg,#eaf2ff 0%,#f4f8ff 100%);border:1px solid #d7e6ff;color:var(--ink);border-radius:var(--radius);padding:36px}
.auth .side h2{color:var(--blue);margin-top:0}
.auth .side a{color:var(--blue);text-decoration:underline}
.ok-msg{background:#e7f7ee;color:#137a4b;border:1px solid #b7e6cd;padding:12px 16px;border-radius:6px;margin-top:14px;font-size:14px}

/* ---------- news / blog list ---------- */
.post{display:grid;grid-template-columns:280px 1fr;gap:24px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;margin-bottom:22px}
.post img{width:100%;height:100%;object-fit:cover;min-height:190px}
.post .bd{padding:22px}
.post .bd .date{color:var(--blue);font-size:13px;font-weight:600}
.post .bd h3{margin:8px 0;font-size:20px}
.post .bd p{color:var(--sub);margin:0 0 10px}

/* ---------- footer ---------- */
.footer{background:#0e1b33;color:#aeb9cc;margin-top:40px}
.footer .wrap{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.3fr;gap:30px;padding:46px 16px}
.footer h4{color:#fff;font-size:16px;margin:0 0 16px}
.footer a{color:#aeb9cc;display:block;padding:4px 0;font-size:14px}
.footer a:hover{color:#fff}
.footer .info p{margin:6px 0;font-size:14px}
.footer .logo2{display:inline-flex;background:#fff;border-radius:10px;padding:10px 14px;margin-bottom:14px}
.footer .logo2 img{height:40px;width:auto}
.foot-bottom{border-top:1px solid #1c2c4a;text-align:center;padding:16px;font-size:13px;color:#8b97ad}

/* ---------- contact page (redesigned) ---------- */
.contact-hero{background:linear-gradient(135deg,#eaf2ff 0%,#f6f9ff 55%,#eef4ff 100%);border-bottom:1px solid var(--line);padding:54px 0}
.contact-hero .ch-inner{max-width:760px}
.contact-hero .en{color:var(--blue);font-weight:700;letter-spacing:3px;font-size:13px}
.contact-hero h1{font-size:34px;margin:8px 0 12px;font-weight:800}
.contact-hero p{color:var(--sub);font-size:15px;margin:0;max-width:620px}
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:36px;align-items:start}
.contact-info{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.ci-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:18px 20px;box-shadow:var(--shadow)}
.ci-card .ci-k{font-size:13px;color:var(--blue);font-weight:600;margin-bottom:6px}
.ci-card .ci-v{font-size:15px;color:var(--ink);font-weight:500}
@media(max-width:980px){.contact-grid,.contact-info{grid-template-columns:1fr}}

/* ---------- responsive ---------- */
@media(max-width:980px){
  .nav{display:none}
  .grid.c3,.grid.c4{grid-template-columns:repeat(2,1fr)}
  .catblock,.pd,.post,.auth{grid-template-columns:1fr}
  .slide .cap h1{font-size:28px}
  .form .row{grid-template-columns:1fr}
}
@media(max-width:560px){
  .grid.c3,.grid.c4{grid-template-columns:1fr}
}