/* ===== 科灵 Keling - 全产品展示 ===== */
:root{--blue:#0056b3;--dark:#003d7a;--red:#e63946;--text:#333;--gray:#666;--bg:#f5f7fa;--radius:10px}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:-apple-system,"Microsoft YaHei","PingFang SC",sans-serif;color:var(--text);line-height:1.6;background:#fff}
img{max-width:100%;height:auto;display:block}
.container{max-width:1100px;margin:0 auto;padding:0 16px}
a{color:var(--blue);text-decoration:none}

/* Header */
.header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.98);border-bottom:1px solid #eee;backdrop-filter:blur(8px)}
.header .container{display:flex;align-items:center;justify-content:space-between;height:60px}
.logo{display:flex;align-items:center;gap:8px;font-weight:700;font-size:18px;color:var(--dark)}
.logo img{height:36px;border-radius:4px}
.header-tel{font-weight:600;color:var(--red);font-size:15px;white-space:nowrap}

/* Language Switcher */
.lang-switcher{display:flex;gap:4px;margin-right:12px}
.lang-btn{padding:4px 10px;border:1px solid #ddd;border-radius:4px;background:#fff;font-size:12px;cursor:pointer;color:var(--gray);transition:all .2s}
.lang-btn:hover{border-color:var(--blue);color:var(--blue)}
.lang-btn.active{background:var(--blue);color:#fff;border-color:var(--blue)}

/* Hero */
.hero{background:linear-gradient(135deg,var(--dark),var(--blue));color:#fff;padding:60px 0;text-align:center}
.hero h1{font-size:clamp(26px,5vw,42px);font-weight:800;margin-bottom:12px;line-height:1.2}
.hero p{font-size:clamp(14px,2.5vw,18px);opacity:.9;margin-bottom:24px;max-width:600px;margin-inline:auto}
.hero-btns{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.btn{display:inline-block;padding:12px 32px;border-radius:50px;font-size:15px;font-weight:600;border:none;cursor:pointer;transition:all .3s;text-align:center}
.btn-red{background:var(--red);color:#fff}
.btn-red:hover{background:#c1121f;transform:translateY(-2px);box-shadow:0 6px 20px rgba(230,57,70,.3)}
.btn-outline{background:transparent;color:#fff;border:2px solid rgba(255,255,255,.7)}
.btn-outline:hover{background:rgba(255,255,255,.15);border-color:#fff}

/* Sections */
.section{padding:50px 0}
.section-alt{background:var(--bg)}
.section-title{text-align:center;margin-bottom:32px}
.section-title h2{font-size:clamp(20px,3vw,28px);color:var(--dark);margin-bottom:6px}
.section-title p{font-size:14px;color:var(--gray)}
.section-title .bar{width:50px;height:3px;background:var(--red);margin:10px auto;border-radius:2px}

/* Features */
.features{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:16px}
.feature-card{background:#fff;border-radius:var(--radius);padding:24px 16px;text-align:center;box-shadow:0 2px 12px rgba(0,0,0,.06)}
.feature-card .icon{font-size:32px;margin-bottom:8px}
.feature-card h3{font-size:15px;margin-bottom:4px;color:var(--dark)}
.feature-card p{font-size:13px;color:var(--gray)}

/* ===== Category Nav ===== */
.cat-nav{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;margin-bottom:32px;position:sticky;top:60px;z-index:50;background:rgba(255,255,255,.95);padding:12px 0;border-bottom:1px solid #eee}
.cat-nav a{padding:6px 16px;border-radius:20px;font-size:13px;font-weight:500;background:#fff;color:var(--text);border:1px solid #ddd;transition:all .2s;white-space:nowrap}
.cat-nav a:hover,.cat-nav a.active{background:var(--blue);color:#fff;border-color:var(--blue)}

/* ===== Product Category Section ===== */
.cat-section{margin-bottom:48px;scroll-margin-top:120px}
.cat-header{display:flex;align-items:center;gap:12px;margin-bottom:20px;padding-bottom:12px;border-bottom:2px solid var(--blue)}
.cat-header .cat-icon{font-size:28px}
.cat-header h3{font-size:20px;color:var(--dark)}
.cat-header .cat-count{font-size:13px;color:var(--gray);margin-left:auto}

/* Product grid */
.prod-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:14px}
.prod-card{background:#fff;border-radius:8px;overflow:hidden;box-shadow:0 1px 8px rgba(0,0,0,.06);transition:transform .2s,box-shadow .2s;cursor:default}
.prod-card:hover{transform:translateY(-3px);box-shadow:0 6px 20px rgba(0,0,0,.12)}
.prod-card .img-wrap{position:relative;background:#fafafa;padding:12px;display:flex;align-items:center;justify-content:center;height:160px;overflow:hidden}
.prod-card .img-wrap img{max-height:136px;width:auto;max-width:100%;object-fit:contain;transition:transform .3s}
.prod-card:hover .img-wrap img{transform:scale(1.05)}
.prod-card .info{padding:10px 10px 14px;text-align:center}
.prod-card .info .pname{font-size:13px;font-weight:600;color:var(--text);line-height:1.4;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.prod-card .info .pspec{font-size:11px;color:var(--gray);margin-top:3px}

/* ===== Factory Gallery ===== */
.factory-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:12px}
.factory-item{border-radius:8px;overflow:hidden;box-shadow:0 1px 8px rgba(0,0,0,.06);transition:transform .2s}
.factory-item:hover{transform:translateY(-2px)}
.factory-item img{width:100%;height:160px;object-fit:cover}
.factory-item .flabel{font-size:12px;color:var(--gray);text-align:center;padding:8px 6px;background:#fff}

/* About mini */
.about-mini{background:#fff;border-radius:var(--radius);padding:28px;text-align:center;box-shadow:0 2px 12px rgba(0,0,0,.06)}
.about-mini p{font-size:14px;color:var(--gray);max-width:700px;margin:0 auto;line-height:1.8}

/* ===== Contact Info Box ===== */
.contact-info-box{max-width:700px;margin:0 auto;display:flex;flex-direction:column;gap:0;background:#fff;border-radius:var(--radius);box-shadow:0 2px 12px rgba(0,0,0,.06);overflow:hidden}
.contact-info-item{display:flex;align-items:center;gap:16px;padding:18px 24px;border-bottom:1px solid #f0f0f0;transition:background .2s}
.contact-info-item:last-child{border-bottom:none}
.contact-info-item:hover{background:rgba(0,86,179,.03)}
.ci-icon{font-size:28px;flex-shrink:0;width:40px;text-align:center}
.ci-text{flex:1}
.ci-text h4{font-size:13px;color:var(--gray);margin-bottom:2px;font-weight:500}
.ci-value{font-size:18px;font-weight:700;color:var(--dark)}
.ci-value a{color:var(--dark);text-decoration:none}
.ci-value a:hover{color:var(--blue)}
.ci-sub{font-size:12px;color:var(--gray);margin-top:2px}

/* Footer */
.footer{background:var(--dark);color:rgba(255,255,255,.7);padding:30px 0;text-align:center;font-size:13px}
.footer .logo-wrap{display:flex;align-items:center;justify-content:center;gap:8px;margin-bottom:10px;color:#fff;font-weight:600;font-size:16px}
.footer .logo-wrap img{height:30px;border-radius:4px}

/* ===== Lightbox ===== */
.lightbox{display:none;position:fixed;top:0;left:0;right:0;bottom:0;z-index:999;background:rgba(0,0,0,.9);align-items:center;justify-content:center;cursor:pointer}
.lightbox.show{display:flex}
.lightbox img{max-width:90vw;max-height:85vh;object-fit:contain;border-radius:4px}
.lightbox .lb-close{position:absolute;top:16px;right:24px;color:#fff;font-size:32px;cursor:pointer;z-index:1;width:40px;height:40px;display:flex;align-items:center;justify-content:center;border-radius:50%;background:rgba(255,255,255,.15)}
.lightbox .lb-close:hover{background:rgba(255,255,255,.3)}
.lightbox .lb-name{position:absolute;bottom:24px;left:50%;transform:translateX(-50%);color:#fff;font-size:14px;background:rgba(0,0,0,.6);padding:6px 18px;border-radius:20px}

/* Float contact bar (mobile) */
.float-bar{display:none;position:fixed;bottom:0;left:0;right:0;z-index:99;background:#fff;border-top:1px solid #eee;padding:8px 12px;gap:8px}
.float-bar a{flex:1;padding:10px;border-radius:8px;font-size:13px;font-weight:600;text-align:center;display:flex;align-items:center;justify-content:center;gap:6px}
.float-bar .btn-tel{background:var(--blue);color:#fff}
.float-bar .btn-wa{background:#25D366;color:#fff}

/* Back to top */
.back-top{position:fixed;bottom:80px;right:20px;z-index:80;width:40px;height:40px;border-radius:50%;background:var(--blue);color:#fff;border:none;cursor:pointer;font-size:18px;display:none;align-items:center;justify-content:center;box-shadow:0 2px 10px rgba(0,0,0,.2);transition:opacity .3s}
.back-top.show{display:flex}

/* ===== Show More 按钮 ===== */
.show-more-wrap{text-align:center;margin-top:16px}
.btn-show-more{display:inline-block;padding:10px 32px;background:#fff;color:var(--blue);border:1px solid var(--blue);border-radius:50px;font-size:14px;font-weight:600;cursor:pointer;transition:all .2s}
.btn-show-more:hover{background:var(--blue);color:#fff;transform:translateY(-1px);box-shadow:0 4px 12px rgba(0,86,179,.2)}

/* Responsive */
@media(max-width:768px){
  .hero{padding:40px 0}
  .section{padding:36px 0}
  .features{grid-template-columns:repeat(2,1fr)}
  .prod-grid{grid-template-columns:repeat(2,1fr);gap:10px}
  .prod-card .img-wrap{height:140px}
  .factory-grid{grid-template-columns:repeat(2,1fr)}
  .float-bar{display:flex}
  .header-tel{font-size:13px}
  .btn{font-size:14px;padding:10px 24px}
  .cat-nav{top:56px;gap:6px}
  .cat-nav a{padding:5px 12px;font-size:12px}
  .cat-section{scroll-margin-top:105px}
  .back-top{bottom:70px}
  .contact-info-item{padding:14px 16px;gap:12px}
  .ci-value{font-size:16px}
}
@media(max-width:480px){
  .prod-grid{grid-template-columns:repeat(2,1fr);gap:8px}
  .prod-card .img-wrap{height:120px;padding:8px}
  .prod-card .img-wrap img{max-height:104px}
  .prod-card .info{padding:8px 6px 10px}
  .prod-card .info .pname{font-size:12px}
  .factory-grid{grid-template-columns:repeat(2,1fr)}
  .features{grid-template-columns:1fr 1fr}
  .btn{width:100%}
  .hero-btns{flex-direction:column;align-items:stretch}
  .cat-nav a{font-size:11px;padding:4px 10px}
}