/* ===== ZTCMS 演示站主样式 ===== */
:root{
  --primary:#2563eb;--primary-dark:#1d4ed8;--primary-light:#eff6ff;
  --dark:#0f172a;--text:#374151;--text-light:#6b7280;
  --border:#e5e7eb;--bg:#f8fafc;--white:#fff;
  --radius:8px;--radius-lg:16px;
  --shadow:0 2px 12px rgba(0,0,0,.08);--shadow-lg:0 8px 32px rgba(0,0,0,.12);
  --transition:.2s ease;
}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:'Segoe UI','Microsoft YaHei',system-ui,sans-serif;color:var(--text);line-height:1.7;background:#fff}
a{text-decoration:none;color:inherit}
img{max-width:100%;display:block}
ul{list-style:none}
.container{max-width:1200px;margin:0 auto;padding:0 20px}

/* ===== 导航 ===== */
.header{position:sticky;top:0;z-index:100;background:#fff;box-shadow:0 1px 8px rgba(0,0,0,.08)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:70px}
.nav-logo{display:flex;align-items:center;gap:10px;font-size:20px;font-weight:700;color:var(--dark)}
.nav-logo img{height:40px;width:auto}
.nav-menu{display:flex;align-items:center;gap:4px}
.nav-menu a{padding:8px 16px;border-radius:6px;font-size:14px;font-weight:500;color:var(--text);transition:var(--transition)}
.nav-menu a:hover,.nav-menu a.active{color:var(--primary);background:var(--primary-light)}
.nav-tel{display:flex;align-items:center;gap:8px;font-size:14px;font-weight:600;color:var(--primary)}
.nav-tel span{font-size:18px;font-weight:700}
.nav-hamburger{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:6px}
.nav-hamburger span{width:24px;height:2px;background:var(--dark);border-radius:2px;transition:var(--transition)}
.nav-mobile{display:none;position:absolute;top:70px;left:0;right:0;background:#fff;box-shadow:var(--shadow-lg);padding:16px 20px}
.nav-mobile a{display:block;padding:12px 0;border-bottom:1px solid var(--border);font-size:15px;color:var(--text)}
.nav-mobile a:last-child{border-bottom:none}
.nav-mobile.open{display:block}

/* ===== 页面横幅 ===== */
.page-banner{background:linear-gradient(135deg,var(--primary) 0%,#1e40af 100%);color:#fff;padding:60px 0;text-align:center}
.page-banner h1{font-size:32px;font-weight:700;margin-bottom:12px}
.page-banner .breadcrumb{font-size:14px;opacity:.8}
.page-banner .breadcrumb a{color:#fff}
.page-banner .breadcrumb a:hover{opacity:.7}

/* ===== 首页 Banner ===== */
.hero{position:relative;background:linear-gradient(135deg,#0f172a 0%,#1e3a8a 100%);min-height:500px;display:flex;align-items:center;overflow:hidden}
.hero-bg{position:absolute;inset:0;background-size:cover;background-position:center;opacity:.3}
.hero-content{position:relative;z-index:1;color:#fff;max-width:680px}
.hero-tag{display:inline-block;background:rgba(255,255,255,.15);border:1px solid rgba(255,255,255,.3);border-radius:20px;padding:5px 16px;font-size:13px;margin-bottom:20px}
.hero-title{font-size:46px;font-weight:800;line-height:1.2;margin-bottom:16px}
.hero-desc{font-size:17px;opacity:.85;margin-bottom:32px}
.hero-btns{display:flex;gap:12px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:8px;padding:13px 28px;border-radius:var(--radius);font-size:15px;font-weight:600;cursor:pointer;border:none;transition:var(--transition)}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-dark);transform:translateY(-1px);box-shadow:0 6px 20px rgba(37,99,235,.4)}
.btn-outline{background:transparent;color:#fff;border:2px solid rgba(255,255,255,.6)}
.btn-outline:hover{background:rgba(255,255,255,.15)}
.btn-sm{padding:9px 20px;font-size:14px}

/* ===== 通用 Section ===== */
.section{padding:72px 0}
.section-alt{background:var(--bg)}
.section-header{text-align:center;margin-bottom:48px}
.section-tag{display:inline-block;background:var(--primary-light);color:var(--primary);font-size:13px;font-weight:600;padding:4px 14px;border-radius:20px;margin-bottom:12px}
.section-title{font-size:32px;font-weight:700;color:var(--dark);margin-bottom:12px}
.section-desc{font-size:15px;color:var(--text-light);max-width:560px;margin:0 auto}

/* ===== 产品卡片 ===== */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.card{background:#fff;border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow);border:1px solid var(--border);transition:var(--transition)}
.card:hover{box-shadow:var(--shadow-lg);transform:translateY(-3px);border-color:var(--primary-light)}
.card-img{width:100%;height:220px;object-fit:cover}
.card-body{padding:20px}
.card-tag{font-size:12px;color:var(--primary);font-weight:600;margin-bottom:8px;text-transform:uppercase;letter-spacing:.5px}
.card-title{font-size:17px;font-weight:700;color:var(--dark);margin-bottom:8px;line-height:1.4;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card-desc{font-size:13px;color:var(--text-light);line-height:1.6;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.card-meta{display:flex;align-items:center;justify-content:space-between;margin-top:14px;padding-top:14px;border-top:1px solid var(--border);font-size:12px;color:var(--text-light)}
.card-more{color:var(--primary);font-size:13px;font-weight:600}
.card-more:hover{text-decoration:underline}

/* ===== 产品图标卡 ===== */
.feature-card{background:#fff;border-radius:var(--radius-lg);padding:32px 24px;text-align:center;border:1px solid var(--border);transition:var(--transition)}
.feature-card:hover{border-color:var(--primary);box-shadow:0 8px 24px rgba(37,99,235,.15)}
.feature-icon{width:64px;height:64px;border-radius:16px;background:var(--primary-light);display:flex;align-items:center;justify-content:center;margin:0 auto 16px;font-size:28px}
.feature-title{font-size:16px;font-weight:700;color:var(--dark);margin-bottom:10px}
.feature-desc{font-size:13px;color:var(--text-light);line-height:1.6}

/* ===== 新闻列表 ===== */
.news-list{display:flex;flex-direction:column;gap:0}
.news-item{display:flex;gap:20px;padding:20px 0;border-bottom:1px solid var(--border)}
.news-item:last-child{border-bottom:none}
.news-thumb{width:120px;height:80px;object-fit:cover;border-radius:var(--radius);flex-shrink:0}
.news-content{flex:1;min-width:0}
.news-title{font-size:15px;font-weight:600;color:var(--dark);margin-bottom:6px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-title:hover{color:var(--primary)}
.news-desc{font-size:13px;color:var(--text-light);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-date{font-size:12px;color:var(--text-light);margin-top:6px}

/* ===== 案例瀑布格 ===== */
.case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.case-card{position:relative;border-radius:var(--radius-lg);overflow:hidden;aspect-ratio:4/3}
.case-card img{width:100%;height:100%;object-fit:cover;transition:.3s}
.case-card:hover img{transform:scale(1.05)}
.case-overlay{position:absolute;inset:0;background:linear-gradient(to top,rgba(0,0,0,.7) 0%,transparent 60%);display:flex;align-items:flex-end;padding:20px;opacity:0;transition:var(--transition)}
.case-card:hover .case-overlay{opacity:1}
.case-info{color:#fff}
.case-name{font-size:15px;font-weight:700;margin-bottom:4px}
.case-cat{font-size:12px;opacity:.8}

/* ===== 统计数字 ===== */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;text-align:center}
.stat-num{font-size:40px;font-weight:800;color:var(--primary);line-height:1}
.stat-unit{font-size:18px;vertical-align:top;margin-top:6px;display:inline-block}
.stat-label{font-size:14px;color:var(--text-light);margin-top:8px}

/* ===== CTA Banner ===== */
.cta{background:linear-gradient(135deg,var(--primary),#1e40af);padding:60px 0;text-align:center;color:#fff}
.cta h2{font-size:30px;font-weight:700;margin-bottom:12px}
.cta p{font-size:16px;opacity:.85;margin-bottom:28px}

/* ===== 列表页 ===== */
.list-layout{display:grid;grid-template-columns:1fr 320px;gap:32px;align-items:start}
.list-main{}
.list-sidebar{position:sticky;top:90px}
.list-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;margin-bottom:32px}
.list-row{display:flex;gap:16px;padding:16px 0;border-bottom:1px solid var(--border)}
.list-row:last-child{border-bottom:none}
.list-row-thumb{width:100px;height:70px;object-fit:cover;border-radius:var(--radius);flex-shrink:0}
.list-row-body{flex:1}
.list-row-title{font-size:15px;font-weight:600;color:var(--dark);margin-bottom:6px}
.list-row-title:hover{color:var(--primary)}
.list-row-desc{font-size:13px;color:var(--text-light);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.list-row-meta{font-size:12px;color:var(--text-light);margin-top:6px}

/* ===== 侧边栏 ===== */
.sidebar-box{background:#fff;border-radius:var(--radius-lg);border:1px solid var(--border);padding:20px;margin-bottom:20px}
.sidebar-title{font-size:15px;font-weight:700;color:var(--dark);padding-bottom:12px;border-bottom:2px solid var(--primary);margin-bottom:14px}
.sidebar-news li{padding:8px 0;border-bottom:1px solid var(--border);font-size:13px}
.sidebar-news li:last-child{border-bottom:none}
.sidebar-news a{color:var(--text);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.sidebar-news a:hover{color:var(--primary)}
.sidebar-contact-item{display:flex;gap:10px;align-items:flex-start;margin-bottom:12px;font-size:13px;color:var(--text)}
.sidebar-contact-item .ico{font-size:16px;color:var(--primary);flex-shrink:0;margin-top:1px}

/* ===== 详情页 ===== */
.detail-layout{display:grid;grid-template-columns:1fr 300px;gap:32px;align-items:start}
.detail-main{}
.detail-header{margin-bottom:24px}
.detail-title{font-size:26px;font-weight:700;color:var(--dark);margin-bottom:12px;line-height:1.4}
.detail-meta{display:flex;gap:16px;font-size:13px;color:var(--text-light);flex-wrap:wrap}
.detail-meta span{display:flex;align-items:center;gap:4px}
.detail-cover{width:100%;max-height:400px;object-fit:cover;border-radius:var(--radius-lg);margin-bottom:24px}
.detail-content{font-size:15px;line-height:1.9;color:var(--text)}
.detail-content img{border-radius:var(--radius);margin:16px auto}
.detail-content p{margin-bottom:16px}
.detail-content h2,.detail-content h3{font-weight:700;color:var(--dark);margin:20px 0 10px}
.detail-nav{display:flex;justify-content:space-between;gap:16px;margin-top:32px;padding-top:20px;border-top:1px solid var(--border)}
.detail-nav a{flex:1;padding:12px;border:1px solid var(--border);border-radius:var(--radius);font-size:13px;color:var(--text);transition:var(--transition)}
.detail-nav a:hover{border-color:var(--primary);color:var(--primary)}

/* ===== 分页 ===== */
.pagination{display:flex;justify-content:center;gap:6px;margin-top:32px}
.pagination a,.pagination span{width:36px;height:36px;display:flex;align-items:center;justify-content:center;border-radius:var(--radius);border:1px solid var(--border);font-size:13px;color:var(--text);transition:var(--transition)}
.pagination a:hover{border-color:var(--primary);color:var(--primary)}
.pagination .active{background:var(--primary);color:#fff;border-color:var(--primary)}

/* ===== 单页(关于/联系) ===== */
.about-content{font-size:15px;line-height:1.9;color:var(--text)}
.about-content img{border-radius:var(--radius-lg);margin:16px 0}
.about-layout{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:32px}
.contact-info-item{display:flex;gap:14px;align-items:flex-start;padding:16px;background:#fff;border-radius:var(--radius-lg);border:1px solid var(--border)}
.contact-icon{width:44px;height:44px;border-radius:10px;background:var(--primary-light);display:flex;align-items:center;justify-content:center;font-size:20px;flex-shrink:0}
.contact-form{background:#fff;border-radius:var(--radius-lg);border:1px solid var(--border);padding:32px}
.form-group{margin-bottom:16px}
.form-group label{display:block;font-size:14px;font-weight:600;color:var(--dark);margin-bottom:6px}
.form-control{width:100%;padding:10px 14px;border:1px solid var(--border);border-radius:var(--radius);font-size:14px;font-family:inherit;transition:var(--transition)}
.form-control:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(37,99,235,.1)}
textarea.form-control{resize:vertical;min-height:100px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.btn-block{width:100%}

/* ===== Footer ===== */
.footer{background:var(--dark);color:rgba(255,255,255,.7);padding:60px 0 0}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;margin-bottom:40px}
.footer-brand .logo-text{font-size:20px;font-weight:700;color:#fff;margin-bottom:12px}
.footer-brand p{font-size:13px;line-height:1.8}
.footer-title{font-size:14px;font-weight:700;color:#fff;margin-bottom:16px}
.footer-links li{margin-bottom:8px}
.footer-links a{font-size:13px;color:rgba(255,255,255,.65);transition:var(--transition)}
.footer-links a:hover{color:#fff}
.footer-contact-item{display:flex;gap:8px;font-size:13px;margin-bottom:10px}
.footer-contact-item .ico{color:var(--primary);flex-shrink:0}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding:20px 0;display:flex;justify-content:space-between;align-items:center;font-size:13px}
.footer-icp a{color:rgba(255,255,255,.5)}
.footer-icp a:hover{color:#fff}

/* ===== 响应式 ===== */
@media(max-width:992px){
  .grid-3,.grid-4{grid-template-columns:repeat(2,1fr)}
  .case-grid{grid-template-columns:repeat(2,1fr)}
  .stats{grid-template-columns:repeat(2,1fr)}
  .list-layout,.detail-layout{grid-template-columns:1fr}
  .list-sidebar{position:static}
  .footer-grid{grid-template-columns:1fr 1fr}
  .about-layout,.contact-grid{grid-template-columns:1fr}
  .hero-title{font-size:34px}
}
@media(max-width:600px){
  .grid-3,.grid-4,.grid-2{grid-template-columns:1fr}
  .case-grid{grid-template-columns:1fr}
  .stats{grid-template-columns:repeat(2,1fr)}
  .nav-menu,.nav-tel{display:none}
  .nav-hamburger{display:flex}
  .footer-grid{grid-template-columns:1fr}
  .hero-title{font-size:26px}
  .section-title{font-size:24px}
  .list-grid{grid-template-columns:1fr}
  .form-row{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;gap:8px;text-align:center}
}