/* === Shared styles for all pages === */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;font-size:16px;line-height:1.7;color:#333;background:#f8f9fa}
a{color:#1a73e8;text-decoration:none;transition:color .2s}
a:hover{color:#1557b0}
img{max-width:100%;height:auto;display:block}
.container{max-width:1200px;margin:0 auto;padding:0 20px}

/* Top bar */
.top-bar{background:#1a3a5c;color:#fff;font-size:14px;padding:8px 0}
.top-bar .container{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:5px}
.top-bar a{color:#ffd700}
.top-bar .tel{font-size:18px;font-weight:bold;color:#ffd700}

/* Header */
.header{background:#0f4ca6;border:none;position:sticky;top:0;z-index:1000}
.header .container{display:flex;justify-content:space-between;align-items:center;height:80px;padding:0 20px}
.logo{display:flex;align-items:center;gap:12px}
.logo img{height:55px;width:auto}
.logo-text{font-size:20px;font-weight:bold;color:#fff;line-height:1.3}
.logo-text small{display:block;font-size:13px;font-weight:normal;color:rgba(255,255,255,.8)}
.nav-toggle{display:none;background:none;border:none;font-size:28px;cursor:pointer;color:#fff;padding:0 10px}
.nav{display:flex;gap:0}
.nav a{display:block;color:#fff;padding:0 18px;line-height:80px;font-size:15px;border-radius:0;transition:background .2s;white-space:nowrap}
.nav a:hover,.nav a.active{background:#0174bf;color:#fff}

/* Page hero (inner pages) */
.page-hero{background:linear-gradient(135deg,#1a3a5c,#2c5f8a);color:#fff;text-align:center;padding:50px 20px}
.page-hero h1{font-size:clamp(24px,4vw,36px);margin-bottom:8px}
.page-hero p{font-size:clamp(14px,2vw,18px);opacity:.9}

/* Section */
.section{padding:50px 0}
.bg-white{background:#fff}
.bg-light{background:#f0f4f8}
.section-title{text-align:center;margin-bottom:30px}
.section-title h2{font-size:clamp(22px,3vw,30px);color:#1a3a5c;margin-bottom:6px}
.section-title p{color:#666;max-width:600px;margin:0 auto}

/* Features grid */
.features{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:20px}
.feature-item{background:#fff;padding:24px 16px;border-radius:12px;text-align:center;box-shadow:0 2px 12px rgba(0,0,0,.06);transition:all .3s}
.feature-item:hover{transform:translateY(-3px)}
.feature-item .icon{font-size:36px;margin-bottom:10px}
.feature-item h3{font-size:16px;color:#1a3a5c;margin-bottom:4px}
.feature-item p{font-size:14px;color:#666;line-height:1.6}

/* Product grid */
.product-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:24px}
.product-card{background:#fff;border-radius:12px;overflow:hidden;box-shadow:0 2px 12px rgba(0,0,0,.06);transition:all .3s}
.product-card:hover{transform:translateY(-4px);box-shadow:0 8px 30px rgba(0,0,0,.1)}
.product-card .card-body{padding:20px}
.product-card .card-body h3{font-size:18px;color:#1a3a5c;margin-bottom:6px}
.product-card .card-body p{font-size:14px;color:#666;line-height:1.6}
.tag{display:inline-block;background:#e8f0fe;color:#1a73e8;font-size:12px;padding:2px 10px;border-radius:20px;margin-top:8px}

/* Cert list */
.cert-list{display:flex;flex-wrap:wrap;gap:16px;justify-content:center}
.cert-badge{background:#fff;border:2px solid #e0e0e0;border-radius:10px;padding:16px 24px;font-size:14px;text-align:center;min-width:140px}

/* Footer */
.footer{background:#232525;color:#a0a0a0;padding:40px 0 20px;font-size:13px}
.footer .container{display:grid;grid-template-columns:1fr 1fr;gap:0}
.footer h3{color:#fff;font-size:15px;margin-bottom:10px}
.footer a{color:#a0a0a0;display:block;margin-bottom:5px}
.footer a:hover{color:#fff}
.footer .copyright{text-align:center;padding-top:15px;margin-top:15px;border-top:1px solid #434343;font-size:12px;grid-column:1/-1}

/* Float bar (mobile) - 与首页一致 */
.float-bar{display:none;position:fixed;bottom:0;left:0;right:0;background:#fff;border-top:1px solid #e5e5e5;padding:8px 10px;z-index:999}
.float-bar .btn-group{display:flex;gap:8px}
.float-bar a{flex:1;text-align:center;padding:10px;border-radius:4px;font-size:14px;font-weight:bold}
.btn-tel{background:#0f4ca6;color:#fff!important}
.btn-wx{background:#07c160;color:#fff!important}

/* Responsive */
@media(max-width:768px){
  .nav-toggle{display:block}
  .nav{display:none;position:absolute;top:100%;left:0;right:0;background:#fff;flex-direction:column;padding:10px 20px 20px;border-bottom:1px solid #e0e0e0;box-shadow:0 4px 10px rgba(0,0,0,.08)}
  .nav.open{display:flex}
  .footer .container{grid-template-columns:1fr;gap:20px}
  .float-bar{display:block}
  body{padding-bottom:60px}
  .logo img{height:40px}
  .logo-text{font-size:16px}
  .logo-text small{font-size:11px}
}

/* Animations */
.fade-in{opacity:0;transform:translateY(20px);transition:all .6s ease}
.fade-in.visible{opacity:1;transform:translateY(0)}

/* TOP BAR */
.top-bar{background:#0f4ca6;color:#fff;font-size:13px;padding:6px 0;text-align:center}
.top-bar a{color:#ffd700}

/* FLOATING WECHAT */
.wx-float{position:fixed;top:50%;right:15px;transform:translateY(-50%);z-index:999;cursor:pointer;text-align:center}
.wx-float .wx-icon{width:50px;height:50px;background:#07c160;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:24px;box-shadow:0 2px 12px rgba(7,193,96,.3);animation:pulse 2s infinite}
.wx-float .wx-label{background:#07c160;color:#fff;font-size:11px;padding:3px 0;border-radius:4px;margin-top:4px;width:47px;text-align:center;line-height:1.6}
@keyframes pulse{0%{box-shadow:0 0 0 0 rgba(7,193,96,.4)}70%{box-shadow:0 0 0 12px rgba(7,193,96,0)}100%{box-shadow:0 0 0 0 rgba(7,193,96,0)}}

.wx-popup{display:none;position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(0,0,0,.5);z-index:1000;align-items:center;justify-content:center}
.wx-popup.show{display:flex}
.wx-popup-content{background:#fff;border-radius:12px;padding:30px 25px 20px;text-align:center;max-width:300px;position:relative;animation:popIn .3s ease}
@keyframes popIn{0%{transform:scale(.8);opacity:0}100%{transform:scale(1);opacity:1}}
.wx-popup-content h3{color:#0f4ca6;font-size:16px;margin-bottom:10px}
.wx-popup-content img{width:200px;height:200px;margin:10px auto;border-radius:4px}
.wx-close{position:absolute;top:8px;right:12px;font-size:20px;color:#999;cursor:pointer;line-height:1}
.wx-close:hover{color:#333}

@media(max-width:768px){
  .nav{display:none;flex-direction:column;position:absolute;top:100%;left:0;right:0;background:#0f4ca6;padding:0;box-shadow:0 4px 12px rgba(0,0,0,.2)}
  .nav.open{display:flex}
  .nav a{padding:0 16px;line-height:48px;border-radius:0;border-bottom:1px solid rgba(255,255,255,.1);color:#fff}
  .header{position:relative}
  .nav-toggle{display:block}
  .wx-float{top:50%;right:10px;transform:translateY(-50%)}
  .wx-float .wx-icon{width:44px;height:44px;font-size:20px}
  .wx-popup-content{padding:25px 20px 15px;max-width:270px}
}