/* ============================================================
   乐佳电子 · 企业网站样式  (简洁大方 / 响应式 / 移动优先)
   ============================================================ */
:root{
  --primary:#0e7a5f;
  --primary-dark:#0b6350;
  --primary-light:#e6f3ee;
  --accent:#17a67f;
  --dark:#1b2b26;
  --gray:#6b7a75;
  --light:#f5f8f7;
  --border:#e3ece8;
  --radius:12px;
  --shadow:0 6px 24px rgba(14,122,95,.08);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;color:var(--dark);line-height:1.7;background:#fff;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{text-decoration:none;color:inherit}
ul{list-style:none}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}

/* ---------- 顶部信息条 ---------- */
.topbar{background:var(--dark);color:#cfe6de;font-size:13px}
.topbar-in{display:flex;justify-content:space-between;padding-top:8px;padding-bottom:8px}
.topbar-right{font-weight:500}

/* ---------- 头部导航 ---------- */
.header{position:sticky;top:0;z-index:100;background:#fff;box-shadow:0 1px 10px rgba(0,0,0,.06)}
.header-in{display:flex;align-items:center;justify-content:space-between;height:72px}
.logo{display:flex;align-items:center;gap:12px}
.logo-mark{width:46px;height:46px;border-radius:10px;background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:14px;letter-spacing:.5px}
.logo-text{display:flex;flex-direction:column;line-height:1.2}
.logo-text strong{font-size:17px;color:var(--dark)}
.logo-text em{font-style:normal;font-size:12px;color:var(--gray)}
.nav ul{display:flex;gap:6px}
.nav a{display:block;padding:8px 16px;border-radius:8px;font-size:15px;font-weight:500;color:var(--dark);transition:.2s}
.nav a:hover{color:var(--primary);background:var(--primary-light)}
.nav a.active{color:var(--primary);background:var(--primary-light);font-weight:600}
.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:8px}
.nav-toggle span{width:24px;height:2px;background:var(--dark);border-radius:2px;transition:.3s}

/* ---------- 按钮 ---------- */
.btn{display:inline-block;padding:12px 28px;border-radius:8px;font-size:15px;font-weight:600;transition:.25s;border:2px solid transparent;cursor:pointer}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-dark)}
.btn-light{background:#fff;color:var(--primary)}
.btn-light:hover{background:var(--primary-light)}
.btn-outline{background:transparent;color:var(--primary);border-color:var(--primary)}
.btn-outline:hover{background:var(--primary);color:#fff}

/* ---------- 首页轮播 ---------- */
.hero{position:relative;height:520px;overflow:hidden;background:#0b6350}
.hero-slide{position:absolute;inset:0;background-size:cover;background-position:center;opacity:0;transition:opacity 1s;display:flex;align-items:center}
.hero-slide.active{opacity:1}
.hero-slide::before{content:'';position:absolute;inset:0;background:linear-gradient(90deg,rgba(11,48,40,.82),rgba(11,99,80,.45))}
.hero-content{position:relative;max-width:1200px;margin:0 auto;padding:0 20px;width:100%;color:#fff}
.hero-content h1{font-size:44px;line-height:1.25;font-weight:800;margin-bottom:16px;max-width:640px}
.hero-content p{font-size:18px;opacity:.92;margin-bottom:28px;max-width:560px}
.hero-dots{position:absolute;bottom:24px;left:50%;transform:translateX(-50%);display:flex;gap:8px;z-index:5}
.hero-dot{width:10px;height:10px;border-radius:50%;background:rgba(255,255,255,.5);cursor:pointer;transition:.2s}
.hero-dot.active{background:#fff;width:26px;border-radius:5px}

/* ---------- 服务亮点 ---------- */
.feature-strip{background:var(--primary);color:#fff;padding:36px 0}
.feature-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.feature{display:flex;flex-direction:column;align-items:center;text-align:center;gap:6px}
.feature-icon{font-size:30px;width:64px;height:64px;border-radius:50%;background:rgba(255,255,255,.16);display:flex;align-items:center;justify-content:center;margin-bottom:4px}
.feature h3{font-size:17px}
.feature p{font-size:13px;opacity:.9}

/* ---------- 区块 ---------- */
.section{padding:72px 0}
.section-alt{background:var(--light)}
.section-title{font-size:30px;font-weight:800;margin-bottom:6px;color:var(--dark)}
.section-title span{display:block;font-size:13px;font-weight:400;color:var(--gray);letter-spacing:2px;margin-top:4px;text-transform:uppercase}
.section-title.center{text-align:center}
.section-sub{text-align:center;color:var(--gray);margin:10px 0 34px}

/* ---------- 关于（首页） ---------- */
.about-home{display:grid;grid-template-columns:1fr 300px;gap:48px;align-items:center}
.about-home-text .lead{font-size:17px;color:var(--primary);font-weight:600;margin:14px 0 12px}
.about-home-text p{color:var(--gray);margin-bottom:10px}
.about-home-side{display:flex;flex-direction:column;gap:16px}
.stat-card{background:var(--primary-light);border-radius:var(--radius);padding:22px;text-align:center;border-left:4px solid var(--primary)}
.stat-num{font-size:22px;font-weight:800;color:var(--primary)}
.stat-label{font-size:13px;color:var(--gray);margin-top:4px}

/* ---------- 分类标签 ---------- */
.cat-tabs{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-bottom:36px}
.cat-tab{padding:9px 18px;border:1px solid var(--border);border-radius:30px;font-size:14px;color:var(--gray);transition:.2s;background:#fff}
.cat-tab:hover{border-color:var(--primary);color:var(--primary)}
.cat-tab.active{background:var(--primary);color:#fff;border-color:var(--primary)}
.cat-tabs.products-page{justify-content:flex-start;margin-bottom:28px}

/* ---------- 产品卡片 ---------- */
.product-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.product-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;transition:.3s;display:flex;flex-direction:column}
.product-card:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:transparent}
.product-img{height:210px;background:var(--light);display:flex;align-items:center;justify-content:center;overflow:hidden}
.product-img img{width:100%;height:100%;object-fit:cover;transition:.4s}
.product-card:hover .product-img img{transform:scale(1.06)}
.img-ph{width:100%;height:100%;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#eef5f2,#dcece6);color:var(--primary);font-size:18px;font-weight:700;letter-spacing:1px}
.img-ph.big{font-size:28px}
.product-info{padding:18px;display:flex;flex-direction:column;flex:1}
.product-info h3{font-size:16px;margin-bottom:6px;line-height:1.4}
.product-cat{font-size:13px;color:var(--primary);margin-bottom:6px}
.product-intro{font-size:13px;color:var(--gray);margin-bottom:12px;flex:1}
.product-more{font-size:13px;color:var(--accent);font-weight:600}

/* ---------- 解决方案 ---------- */
.solution-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.solution-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:26px;transition:.3s;position:relative;overflow:hidden}
.solution-card::before{content:'';position:absolute;top:0;left:0;right:0;height:4px;background:var(--primary)}
.solution-card:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.solution-card h3{font-size:18px;margin-bottom:10px;color:var(--primary)}
.solution-card p{font-size:14px;color:var(--gray);margin-bottom:16px}
.solution-link{font-size:14px;color:var(--accent);font-weight:600}

/* 解决方案详情页 */
.solution-full-grid{display:flex;flex-direction:column;gap:40px}
.solution-full{display:grid;grid-template-columns:1fr 1.2fr;gap:36px;align-items:center;background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:26px}
.solution-full.reverse .sf-img{order:2}
.sf-img{height:240px;border-radius:10px;overflow:hidden;background:var(--light)}
.sf-img img{width:100%;height:100%;object-fit:cover}
.sf-body h2{color:var(--primary);margin-bottom:12px;font-size:22px}
.sf-body p{color:var(--gray);margin-bottom:8px}
.sf-content{margin:12px 0 20px;color:var(--gray)}

/* ---------- 新闻 ---------- */
.news-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.news-card{display:flex;gap:18px;background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:20px;transition:.3s}
.news-card:hover{box-shadow:var(--shadow);transform:translateY(-4px)}
.news-date{display:flex;flex-direction:column;align-items:center;justify-content:center;min-width:64px;background:var(--primary);color:#fff;border-radius:10px;padding:10px;height:fit-content}
.news-date .d{font-size:26px;font-weight:800;line-height:1}
.news-date .m{font-size:12px;opacity:.9}
.news-body h3{font-size:16px;margin-bottom:8px;line-height:1.4}
.news-body p{font-size:13px;color:var(--gray);margin-bottom:10px}
.news-more{font-size:13px;color:var(--accent);font-weight:600}
/* 新闻列表页 */
.news-list{display:flex;flex-direction:column;gap:16px}
.news-row{display:flex;gap:20px;align-items:center;background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:18px 20px;transition:.25s}
.news-row:hover{box-shadow:var(--shadow);border-color:var(--primary)}
.news-row-date{display:flex;flex-direction:column;align-items:center;min-width:60px;color:var(--primary);border-right:2px solid var(--border);padding-right:18px}
.news-row-date .d{font-size:30px;font-weight:800;line-height:1}
.news-row-date .m{font-size:12px}
.news-row-body{flex:1}
.news-row-body h3{font-size:16px;margin-bottom:6px}
.news-row-body h3 a:hover{color:var(--primary)}
.news-tag{display:inline-block;font-size:12px;background:var(--primary-light);color:var(--primary);padding:2px 10px;border-radius:20px;margin-bottom:6px}
.news-row-body p{font-size:13px;color:var(--gray)}
.news-row-more{color:var(--primary);font-weight:600;font-size:14px;white-space:nowrap}

/* ---------- 页面横幅 ---------- */
.page-banner{background:linear-gradient(135deg,var(--primary-dark),var(--primary));color:#fff;padding:56px 0;text-align:center}
.page-banner h1{font-size:32px;font-weight:800}
.page-banner p{opacity:.8;letter-spacing:3px;font-size:13px;text-transform:uppercase;margin-top:6px}

/* ---------- 页面内部 ---------- */
.page-head{margin-bottom:24px}
.page-head h2{font-size:24px}
.page-head-line{width:50px;height:3px;background:var(--primary);margin-top:8px;border-radius:3px}
.about-body{color:#4a5a55;margin-bottom:30px}
.about-body p{margin-bottom:14px}
.about-body img{max-width:100%;border-radius:8px;margin:10px 0}
.about-certs{margin-bottom:36px}
.about-certs h3{font-size:20px;margin-bottom:16px}
.cert-list{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
.cert-list li{background:var(--primary-light);border-radius:8px;padding:14px 16px;font-size:14px;font-weight:500;color:var(--primary-dark);display:flex;align-items:center;gap:10px}
.cert-list li::before{content:'✓';font-weight:800}
.about-idea{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.idea-item{background:var(--light);border-radius:var(--radius);padding:24px;text-align:center}
.idea-item h4{color:var(--primary);font-size:17px;margin-bottom:8px}
.idea-item p{font-size:14px;color:var(--gray)}

/* ---------- 面包屑 ---------- */
.breadcrumb{font-size:14px;color:var(--gray);margin-bottom:28px}
.breadcrumb a{color:var(--primary)}
.breadcrumb a:hover{text-decoration:underline}

/* ---------- 产品详情 ---------- */
.product-detail{display:grid;grid-template-columns:460px 1fr;gap:40px;margin-bottom:40px}
.pd-left{}
.pd-main-img{width:100%;border-radius:var(--radius);border:1px solid var(--border);background:var(--light)}
.pd-thumbs{display:flex;gap:10px;margin-top:12px;flex-wrap:wrap}
.pd-thumbs img{width:70px;height:70px;object-fit:cover;border-radius:8px;border:1px solid var(--border);cursor:pointer}
.pd-name{font-size:26px;font-weight:800;margin-bottom:12px}
.pd-model{font-size:15px;margin-bottom:8px}
.pd-model strong{color:var(--primary)}
.pd-cat{font-size:14px;color:var(--gray);margin-bottom:16px}
.pd-intro{color:#4a5a55;margin-bottom:24px;padding:16px;background:var(--light);border-radius:8px;font-size:15px}
.pd-contact{border-top:1px solid var(--border);padding-top:18px}
.pd-contact p{font-size:14px;color:var(--gray);margin-bottom:6px}
.pd-tel{font-size:16px;color:var(--primary);font-weight:700;margin-bottom:14px !important}
.pd-content{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:30px;margin-bottom:36px}
.pd-content img{max-width:100%;border-radius:8px;margin:12px 0}
.pd-content p{margin-bottom:12px;color:#4a5a55}
.pd-sec-title{font-size:20px;margin-bottom:18px;padding-left:12px;border-left:4px solid var(--primary)}
.related .product-grid{grid-template-columns:repeat(4,1fr)}

/* ---------- 新闻详情 ---------- */
.news-detail{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:36px}
.nd-title{font-size:26px;font-weight:800;margin-bottom:14px;line-height:1.4}
.nd-meta{display:flex;gap:20px;flex-wrap:wrap;color:var(--gray);font-size:13px;padding-bottom:16px;border-bottom:1px solid var(--border);margin-bottom:22px}
.nd-cover{width:100%;max-height:420px;object-fit:cover;border-radius:10px;margin-bottom:22px}
.nd-content{color:#4a5a55;line-height:1.9}
.nd-content p{margin-bottom:14px}
.nd-content img{max-width:100%;border-radius:8px;margin:12px 0}
.nd-content h2,.nd-content h3{margin:18px 0 10px;color:var(--dark)}
.nd-nav{display:flex;justify-content:space-between;gap:20px;margin-top:30px;padding-top:20px;border-top:1px solid var(--border);font-size:14px}
.nd-nav a{color:var(--primary);flex:1}
.nd-nav a:hover{text-decoration:underline}
.nd-next{text-align:right}

/* ---------- 联系我们 ---------- */
.contact-wrap{display:grid;grid-template-columns:1fr 1fr;gap:48px}
.contact-info h2{font-size:26px;margin-bottom:8px}
.contact-sub{color:var(--gray);margin-bottom:24px}
.contact-detail li{display:flex;padding:14px 0;border-bottom:1px solid var(--border);font-size:15px;gap:16px}
.contact-detail li span{min-width:88px;color:var(--gray);font-weight:600}
.contact-detail li a{color:var(--primary)}
.contact-form{background:var(--light);border-radius:var(--radius);padding:30px}
.contact-form h2{font-size:22px;margin-bottom:20px}
.form-row{margin-bottom:16px}
.form-row label{display:block;font-size:14px;margin-bottom:6px;font-weight:500}
.form-row label span{color:#d04a4a}
.form-row input,.form-row textarea{width:100%;padding:12px;border:1px solid var(--border);border-radius:8px;font-size:14px;font-family:inherit;background:#fff}
.form-row input:focus,.form-row textarea:focus{outline:none;border-color:var(--primary)}
.alert{padding:12px 16px;border-radius:8px;margin-bottom:16px;font-size:14px}
.alert-ok{background:#e6f7ee;color:#0b6350;border:1px solid #bfe8d3}
.alert-err{background:#fdecec;color:#b03030;border:1px solid #f3caca}

/* ---------- 分页 ---------- */
.pagination{display:flex;gap:8px;justify-content:center;margin-top:36px}
.page-num{width:40px;height:40px;display:flex;align-items:center;justify-content:center;border:1px solid var(--border);border-radius:8px;font-size:14px;color:var(--gray);transition:.2s}
.page-num:hover{border-color:var(--primary);color:var(--primary)}
.page-num.active{background:var(--primary);color:#fff;border-color:var(--primary)}
.empty{text-align:center;color:var(--gray);padding:40px}

/* ---------- 页脚 ---------- */
.footer{background:var(--dark);color:#a8bfb8;font-size:14px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1.2fr 1fr;gap:36px;padding:52px 20px 36px}
.footer-logo{font-size:20px;font-weight:800;color:#fff;margin-bottom:12px}
.footer-about p{line-height:1.8;margin-bottom:8px}
.footer-desc{opacity:.8}
.footer-col h4{color:#fff;font-size:15px;margin-bottom:16px;position:relative;padding-bottom:10px}
.footer-col h4::after{content:'';position:absolute;left:0;bottom:0;width:30px;height:2px;background:var(--accent)}
.footer-col ul li{margin-bottom:10px}
.footer-col ul li a:hover{color:#fff}
.contact-list li{display:flex;align-items:flex-start;gap:8px;opacity:.92}
.qr-img{width:100px;height:100px;border-radius:8px;background:#fff;padding:4px}
.qr-placeholder{width:100px;height:100px;border-radius:8px;background:rgba(255,255,255,.08);display:flex;align-items:center;justify-content:center;text-align:center;font-size:12px;color:#a8bfb8}
.footer-bottom{border-top:1px solid rgba(255,255,255,.08);padding:18px 0}
.footer-bottom .container{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;font-size:13px}
.footer-admin a{color:var(--accent)}

/* ============================================================
   响应式 (移动优先适配)
   ============================================================ */
@media (max-width:1024px){
  .product-grid{grid-template-columns:repeat(3,1fr)}
  .solution-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:900px){
  .about-home{grid-template-columns:1fr}
  .solution-full{grid-template-columns:1fr}
  .solution-full.reverse .sf-img{order:0}
  .product-detail{grid-template-columns:1fr}
  .contact-wrap{grid-template-columns:1fr}
  .feature-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:768px){
  /* 移动导航 */
  .nav-toggle{display:flex}
  .nav{position:fixed;top:72px;left:0;right:0;background:#fff;box-shadow:0 8px 20px rgba(0,0,0,.1);transform:translateY(-120%);transition:.3s;opacity:0;pointer-events:none}
  .nav.open{transform:translateY(0);opacity:1;pointer-events:auto}
  .nav ul{flex-direction:column;padding:12px}
  .nav a{padding:14px 16px;border-radius:8px;font-size:16px}
  .nav a:hover{background:var(--primary-light)}
  .hero{height:420px}
  .hero-content h1{font-size:30px}
  .hero-content p{font-size:16px}
  .section{padding:48px 0}
  .section-title{font-size:24px}
  .product-grid{grid-template-columns:repeat(2,1fr);gap:14px}
  .news-grid{grid-template-columns:1fr}
  .solution-grid{grid-template-columns:1fr}
  .cert-list{grid-template-columns:1fr}
  .about-idea{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .footer-bottom .container{justify-content:center}
  .contact-detail li{flex-direction:column;gap:2px}
  .related .product-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:480px){
  .topbar-right{display:none}
  .logo-text strong{font-size:15px}
  .hero{height:360px}
  .product-grid{grid-template-columns:1fr}
  .product-img{height:180px}
  .feature-grid{grid-template-columns:1fr 1fr}
  .news-row{flex-direction:column;align-items:flex-start}
  .news-row-date{flex-direction:row;gap:8px;border-right:none;border-bottom:2px solid var(--border);padding-bottom:8px;margin-bottom:8px}
  .related .product-grid{grid-template-columns:1fr}
}