/* YunXiang JuCai — Global Styles */
:root{
  --primary:#0a3d74;
  --primary-dark:#072c55;
  --primary-light:#14508c;
  --accent:#f6a01a;
  --accent-dark:#d98806;
  --bg:#ffffff;
  --bg-soft:#f5f8fb;
  --text:#22303e;
  --text-muted:#5c6b7a;
  --border:#e3e9f0;
  --radius:10px;
  --shadow:0 6px 24px rgba(10,61,116,.08);
  --maxw:1180px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:"Segoe UI",Helvetica,Arial,"PingFang SC","Microsoft YaHei",sans-serif;color:var(--text);background:var(--bg);line-height:1.7;font-size:16px}
img{max-width:100%;display:block}
a{color:var(--primary);text-decoration:none}
a:hover{color:var(--accent-dark)}
.container{max-width:var(--maxw);margin:0 auto;padding:0 24px}

/* ---------- Header ---------- */
.topbar{background:var(--primary-dark);color:#cfe0f2;font-size:13px}
.topbar .container{display:flex;justify-content:space-between;align-items:center;height:36px}
.topbar a{color:#fff;margin-left:14px}
header.site{position:sticky;top:0;z-index:100;background:#fff;box-shadow:0 2px 12px rgba(0,0,0,.06)}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;height:72px}
.logo{display:flex;align-items:center;gap:10px}
.logo-mark{width:44px;height:44px;border-radius:8px;background:linear-gradient(135deg,var(--primary) 0%,var(--primary-light) 60%,var(--accent) 130%);color:#fff;font-weight:800;font-size:15px;display:flex;align-items:center;justify-content:center;letter-spacing:.5px}
.logo-text strong{display:block;font-size:18px;color:var(--primary);line-height:1.2}
.logo-text span{font-size:11px;color:var(--text-muted);letter-spacing:.8px;text-transform:uppercase}
nav.main{display:flex;align-items:center;gap:4px}
nav.main>a,nav.main .drop>a{padding:8px 14px;font-weight:600;color:var(--text);border-radius:6px;font-size:15px;display:block}
nav.main>a:hover,nav.main .drop>a:hover{background:var(--bg-soft);color:var(--primary)}
nav.main>a.active{color:var(--accent-dark)}
.drop{position:relative}
.drop-menu{position:absolute;top:100%;left:0;min-width:250px;background:#fff;border:1px solid var(--border);border-radius:8px;box-shadow:var(--shadow);padding:8px 0;display:none;flex-direction:column}
.drop:hover .drop-menu{display:flex}
.drop-menu a{padding:9px 18px;font-size:14px;color:var(--text)}
.drop-menu a:hover{background:var(--bg-soft);color:var(--primary)}
.btn{display:inline-block;padding:12px 26px;border-radius:8px;font-weight:700;font-size:15px;transition:.2s;cursor:pointer;border:none}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:hover{background:var(--accent-dark);color:#fff}
.btn-outline{border:2px solid #fff;color:#fff}
.btn-outline:hover{background:#fff;color:var(--primary)}
.btn-nav{background:var(--accent);color:#fff;padding:10px 20px;margin-left:10px}
.btn-nav:hover{background:var(--accent-dark);color:#fff}

/* ---------- Mobile burger nav ---------- */
.nav-toggle{position:absolute;opacity:0;pointer-events:none}
.nav-burger{display:none;width:44px;height:44px;align-items:center;justify-content:center;font-size:22px;color:var(--primary);background:var(--bg-soft);border:1px solid var(--border);border-radius:8px;cursor:pointer;user-select:none;-webkit-tap-highlight-color:transparent}
.nav-burger:active{background:#e8eef5}

/* ---------- Hero ---------- */
.hero{position:relative;min-height:520px;display:flex;align-items:center;color:#fff;background:linear-gradient(rgba(6,32,61,.72),rgba(6,32,61,.55)),url("../img/case-screen-closeup.jpg") center/cover no-repeat}
.hero-content{max-width:640px;padding:80px 0}
.hero h1{font-size:44px;line-height:1.2;margin-bottom:18px;font-weight:800}
.hero p{font-size:18px;color:#dce8f4;margin-bottom:30px}
.hero .btn{margin-right:14px}
.page-hero{background:linear-gradient(rgba(6,32,61,.82),rgba(6,32,61,.72)),url("../img/case-screen-closeup.jpg") center/cover no-repeat;color:#fff;padding:70px 0 60px}
.page-hero h1{font-size:36px;margin-bottom:10px}
.page-hero p{color:#c9d9ea;max-width:720px}
.breadcrumb{font-size:13px;color:#9fb4ca;margin-top:14px}
.breadcrumb a{color:#cfe0f2}

/* ---------- Sections ---------- */
section{padding:70px 0}
section.soft{background:var(--bg-soft)}
.sec-head{text-align:center;max-width:760px;margin:0 auto 46px}
.sec-head .kicker{color:var(--accent-dark);font-weight:700;letter-spacing:2px;text-transform:uppercase;font-size:13px}
.sec-head h2{font-size:32px;color:var(--primary);margin:8px 0 12px}
.sec-head p{color:var(--text-muted)}
.grid{display:grid;gap:26px}
.g2{grid-template-columns:repeat(2,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}

.card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:transform .2s;display:flex;flex-direction:column}
.card:hover{transform:translateY(-4px)}
.card img{width:100%;height:210px;object-fit:cover}
.card-body{padding:20px 22px 24px;flex:1;display:flex;flex-direction:column}
.card-body h3{font-size:18px;color:var(--primary);margin-bottom:8px}
.card-body p{font-size:14px;color:var(--text-muted);flex:1}
.card-body .more{margin-top:14px;font-weight:700;font-size:14px}

.feature{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow)}
.feature .icon{font-size:30px;margin-bottom:10px}
.feature h3{font-size:17px;color:var(--primary);margin-bottom:8px}
.feature p{font-size:14px;color:var(--text-muted)}

.stat-band{background:linear-gradient(120deg,var(--primary-dark),var(--primary-light));color:#fff;padding:56px 0}
.stat-band .grid{gap:20px}
.stat{text-align:center}
.stat .num{font-size:38px;font-weight:800;color:var(--accent)}
.stat .lbl{font-size:14px;color:#c9d9ea;margin-top:4px}

.split{display:grid;grid-template-columns:1.1fr .9fr;gap:50px;align-items:center}
.split img{border-radius:var(--radius);box-shadow:var(--shadow);width:100%;height:100%;object-fit:cover}
.split h2{font-size:30px;color:var(--primary);margin-bottom:16px}
.split p{color:var(--text-muted);margin-bottom:14px}
.checklist{list-style:none;margin:16px 0 22px}
.checklist li{padding-left:30px;position:relative;margin-bottom:10px;color:var(--text)}
.checklist li::before{content:"✓";position:absolute;left:0;top:0;width:20px;height:20px;border-radius:50%;background:var(--accent);color:#fff;font-size:12px;display:flex;align-items:center;justify-content:center;font-weight:700}

/* Tables */
.spec-table{width:100%;border-collapse:collapse;font-size:14px;margin:18px 0}
.spec-table th,.spec-table td{border:1px solid var(--border);padding:10px 14px;text-align:left}
.spec-table th{background:var(--bg-soft);color:var(--primary);width:220px}

/* FAQ */
.faq-item{background:#fff;border:1px solid var(--border);border-radius:var(--radius);margin-bottom:14px;padding:18px 22px}
.faq-item h3{font-size:16px;color:var(--primary);margin-bottom:6px}
.faq-item p{font-size:14px;color:var(--text-muted)}

/* CTA band */
.cta-band{background:linear-gradient(120deg,var(--primary-dark),var(--primary-light));color:#fff;padding:60px 0;text-align:center}
.cta-band h2{font-size:30px;margin-bottom:10px}
.cta-band p{color:#c9d9ea;margin-bottom:26px}

/* Product page */
.product-detail{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:start}
.gallery{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.gallery img{border-radius:var(--radius);height:200px;width:100%;object-fit:cover;border:1px solid var(--border)}
.gallery .wide{grid-column:1/-1;height:300px}
.tag-row{margin:14px 0}
.tag{display:inline-block;background:var(--bg-soft);border:1px solid var(--border);color:var(--primary);border-radius:20px;padding:4px 14px;font-size:13px;margin:0 6px 8px 0}

/* Contact */
.contact-grid{display:grid;grid-template-columns:1fr 1.2fr;gap:44px}
.contact-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:24px;margin-bottom:18px;box-shadow:var(--shadow)}
.contact-card h3{color:var(--primary);font-size:16px;margin-bottom:10px}
.contact-card p{font-size:15px}
.contact-card a{font-weight:600}
form .field{margin-bottom:16px}
form label{display:block;font-size:14px;font-weight:600;margin-bottom:6px;color:var(--primary)}
form input,form select,form textarea{width:100%;padding:11px 14px;border:1px solid var(--border);border-radius:8px;font-size:15px;font-family:inherit;background:#fff}
form input:focus,form textarea:focus{outline:2px solid var(--accent);border-color:transparent}

/* Footer */
footer.site{background:var(--primary-dark);color:#b9cbe0;padding:56px 0 0;font-size:14px}
footer.site .grid{gap:36px}
footer.site h4{color:#fff;font-size:16px;margin-bottom:16px}
footer.site a{color:#b9cbe0}
footer.site a:hover{color:var(--accent)}
footer.site ul{list-style:none}
footer.site li{margin-bottom:9px}
.foot-bottom{border-top:1px solid rgba(255,255,255,.12);margin-top:44px;padding:18px 0;text-align:center;font-size:13px;color:#8aa3bf}

/* Responsive */
@media(max-width:960px){
  .g4{grid-template-columns:repeat(2,1fr)}
  .g3{grid-template-columns:repeat(2,1fr)}
  .split,.contact-grid,.product-detail{grid-template-columns:1fr}
  section{padding:52px 0}

  /* 抽屉式导航 */
  .nav-wrap{height:64px;position:relative}
  nav.main{
    display:none;
    position:absolute;top:100%;left:0;right:0;
    background:#fff;
    flex-direction:column;align-items:stretch;gap:2px;
    border-top:1px solid var(--border);
    box-shadow:0 14px 26px rgba(0,0,0,.1);
    padding:10px 18px 18px;
    max-height:calc(100vh - 64px);overflow-y:auto;
  }
  .nav-toggle:checked ~ nav.main{display:flex}
  .nav-burger{display:flex}
  nav.main>a,nav.main .drop>a{padding:13px 14px;font-size:16px;border-radius:8px}
  .btn-nav{margin:8px 0 0;text-align:center;padding:13px 20px}
  .drop-menu{position:static;display:flex;min-width:0;border:none;box-shadow:none;padding:0 0 0 16px;background:transparent}
  nav.main .drop>a::after{content:"";}

  .hero h1{font-size:32px}
}
@media(max-width:600px){
  .g2,.g3,.g4{grid-template-columns:1fr}
  .topbar{display:none}
  .container{padding:0 16px}
  section{padding:44px 0}
  .hero{min-height:430px}
  .hero-content{padding:52px 0}
  .hero h1{font-size:27px}
  .hero p{font-size:16px}
  .hero .btn{margin-right:10px}
  .page-hero{padding:52px 0 44px}
  .page-hero h1{font-size:26px}
  .sec-head{margin-bottom:34px}
  .sec-head h2{font-size:24px}
  .split h2{font-size:24px}
  .cta-band h2{font-size:24px}
  .stat .num{font-size:30px}
  .stat-band{padding:44px 0}
  .gallery{grid-template-columns:1fr}
  .gallery img{height:190px}
  .gallery .wide{height:230px}
  .spec-table{display:block;overflow-x:auto;-webkit-overflow-scrolling:touch}
  .spec-table th{width:auto;white-space:nowrap}
  .card-body h3{font-size:17px}
  .contact-card{padding:20px}
  .btn{padding:12px 22px;font-size:15px}
}