/* =========================================================
   恒科网络 - 天蓝主题样式（宽屏自适应）
   ========================================================= */
:root{
    --primary:#2196F3;        /* 天蓝主色 */
    --primary-dark:#1565C0;
    --primary-light:#E3F2FD;
    --accent:#00B0FF;
    --grad:linear-gradient(135deg,#2196F3 0%,#21CBF3 100%);
    --grad-deep:linear-gradient(135deg,#1565C0 0%,#2196F3 100%);
    --text:#333;
    --text-2:#666;
    --text-3:#999;
    --line:#e8eef5;
    --bg:#f5f9ff;
    --white:#fff;
    --radius:10px;
    --shadow:0 6px 24px rgba(33,150,243,.10);
    --shadow-hover:0 10px 30px rgba(33,150,243,.18);
    --maxw:1200px;
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
    font-family:"Microsoft YaHei","PingFang SC","Hiragino Sans GB",Arial,sans-serif;
    color:var(--text);background:var(--bg);
    font-size:15px;line-height:1.7;-webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none;transition:.2s}
img{max-width:100%;display:block}
ul{list-style:none}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 16px}

/* ===== 顶部条 ===== */
.topbar{background:var(--grad-deep);color:#fff;font-size:13px}
.topbar-inner{display:flex;justify-content:space-between;align-items:center;height:38px}
.topbar a{color:#fff;font-weight:600}
.topbar .sep{opacity:.5;margin:0 6px}

/* ===== 头部/Logo/导航 ===== */
.site-header{background:#fff;box-shadow:0 2px 12px rgba(0,0,0,.05);position:sticky;top:0;z-index:50}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:72px}
.logo{display:flex;align-items:baseline;font-weight:800;line-height:1}
.logo-mark{background:var(--grad);color:#fff;padding:6px 10px;border-radius:8px;font-size:22px;margin-right:6px}
.logo-text{font-size:24px;color:var(--primary-dark)}
.logo-sub{display:block;font-size:11px;color:var(--text-3);letter-spacing:2px;margin-top:2px;font-weight:400}
.main-nav{display:flex;gap:4px}
.main-nav a{padding:10px 14px;border-radius:8px;font-size:15px;color:var(--text);font-weight:600;position:relative}
.main-nav a:hover{color:var(--primary);background:var(--primary-light)}
.main-nav a.active{color:#fff;background:var(--grad)}
.nav-toggle{display:none;background:none;border:none;font-size:26px;color:var(--primary);cursor:pointer}

/* ===== 通用区块 ===== */
.section{padding:56px 0}
.section-title{text-align:center;margin-bottom:36px}
.section-title h2{font-size:30px;color:var(--primary-dark);position:relative;display:inline-block;padding-bottom:12px}
.section-title h2::after{content:"";position:absolute;left:50%;transform:translateX(-50%);bottom:0;width:64px;height:4px;background:var(--grad);border-radius:2px}
.section-title p{color:var(--text-2);margin-top:10px;font-size:15px}
.band{background:var(--white)}
.band-blue{background:var(--primary-light)}

/* ===== 首页 Hero ===== */
.hero{background:var(--grad);color:#fff;padding:78px 0;position:relative;overflow:hidden}
.hero::before,.hero::after{content:"";position:absolute;border-radius:50%;background:rgba(255,255,255,.12)}
.hero::before{width:320px;height:320px;right:-80px;top:-100px}
.hero::after{width:200px;height:200px;left:-60px;bottom:-90px}
.hero-inner{position:relative;z-index:2;max-width:760px}
.hero h1{font-size:42px;line-height:1.3;margin-bottom:18px;text-shadow:0 2px 12px rgba(0,0,0,.15)}
.hero p{font-size:17px;opacity:.95;margin-bottom:28px}
.hero-btns{display:flex;gap:16px;flex-wrap:wrap}
.btn{display:inline-block;padding:13px 30px;border-radius:30px;font-weight:700;font-size:15px;transition:.25s}
.btn-white{background:#fff;color:var(--primary-dark)}
.btn-white:hover{box-shadow:0 8px 24px rgba(0,0,0,.2);transform:translateY(-2px)}
.btn-ghost{border:2px solid #fff;color:#fff}
.btn-ghost:hover{background:#fff;color:var(--primary-dark)}
.btn-primary{background:var(--grad);color:#fff;box-shadow:var(--shadow)}
.btn-primary:hover{box-shadow:var(--shadow-hover);transform:translateY(-2px)}

/* ===== 服务卡片网格 ===== */
.service-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:20px}
.service-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px 18px;text-align:center;transition:.25s;position:relative;overflow:hidden}
.service-card:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:var(--primary)}
.service-card .ico{width:60px;height:60px;margin:0 auto 14px;border-radius:14px;background:var(--grad);display:flex;align-items:center;justify-content:center;font-size:28px;color:#fff}
.service-card h3{font-size:18px;color:var(--primary-dark);margin-bottom:8px}
.service-card p{font-size:13px;color:var(--text-2);line-height:1.6}

/* ===== 优势 ===== */
.feat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.feat-item{background:#fff;border-radius:var(--radius);padding:26px;box-shadow:var(--shadow);border-top:3px solid var(--primary)}
.feat-item .num{font-size:30px;font-weight:800;color:var(--primary);opacity:.25}
.feat-item h3{font-size:17px;margin:8px 0 8px;color:var(--primary-dark)}
.feat-item p{font-size:14px;color:var(--text-2)}

/* ===== 数据统计 ===== */
.stats{background:var(--grad-deep);color:#fff}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;text-align:center}
.stat .n{font-size:40px;font-weight:800}
.stat .t{opacity:.9;margin-top:6px}

/* ===== 新闻列表 ===== */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.news-card{background:#fff;border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);transition:.25s;display:flex;flex-direction:column}
.news-card:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.news-thumb{height:170px;background:var(--grad);display:flex;align-items:center;justify-content:center;color:#fff;font-size:42px}
.news-body{padding:18px}
.news-body .date{font-size:12px;color:var(--text-3)}
.news-body h3{font-size:17px;margin:8px 0;color:var(--text);line-height:1.5}
.news-body h3 a:hover{color:var(--primary)}
.news-body p{font-size:13px;color:var(--text-2);line-height:1.6}
.news-more{display:inline-block;margin-top:10px;color:var(--primary);font-weight:600;font-size:13px}

/* ===== 内容页通用 ===== */
.page-banner{background:var(--grad);color:#fff;padding:46px 0;text-align:center}
.page-banner h1{font-size:32px;margin-bottom:8px}
.page-banner p{opacity:.9}
.breadcrumb{background:#fff;border-bottom:1px solid var(--line);font-size:13px;color:var(--text-3);padding:12px 0}
.breadcrumb a:hover{color:var(--primary)}
.content-wrap{max-width:900px;margin:0 auto}
.article{padding:40px 0}
.article h2{font-size:24px;color:var(--primary-dark);margin:26px 0 14px;border-left:4px solid var(--primary);padding-left:12px}
.article h3{font-size:19px;color:var(--primary-dark);margin:20px 0 10px}
.article p{margin-bottom:14px;color:var(--text)}
.article ul,.article ol{margin:0 0 16px 22px}
.article li{margin-bottom:8px;color:var(--text)}
.article a{color:var(--primary);text-decoration:underline}

/* ===== 价格表 ===== */
.price-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.price-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:.25s;position:relative}
.price-card:hover{box-shadow:var(--shadow);transform:translateY(-6px)}
.price-card.hot{border:2px solid var(--primary);transform:scale(1.03)}
.price-card .tag{position:absolute;top:12px;right:-30px;background:#ff5722;color:#fff;font-size:12px;padding:4px 34px;transform:rotate(45deg)}
.price-head{background:var(--grad);color:#fff;text-align:center;padding:26px 16px}
.price-head .name{font-size:20px;font-weight:700}
.price-head .money{font-size:34px;font-weight:800;margin-top:6px}
.price-head .money small{font-size:14px;font-weight:400}
.price-list{padding:20px}
.price-list li{padding:9px 0;border-bottom:1px dashed var(--line);font-size:14px;color:var(--text-2);display:flex;align-items:center;gap:8px}
.price-list li::before{content:"✓";color:var(--primary);font-weight:700}
.price-list li.no::before{content:"✕";color:#bbb}
.price-list li.no{color:#bbb}
.price-foot{text-align:center;padding:0 20px 24px}

/* ===== 联系页 ===== */
.contact-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:30px}
.contact-info{background:#fff;border-radius:var(--radius);padding:30px;box-shadow:var(--shadow)}
.contact-info h3{color:var(--primary-dark);margin-bottom:14px}
.contact-info .row{display:flex;gap:10px;margin-bottom:12px;color:var(--text-2)}
.contact-info .row b{color:var(--text);min-width:64px}
.contact-form{background:#fff;border-radius:var(--radius);padding:30px;box-shadow:var(--shadow)}
.form-group{margin-bottom:16px}
.form-group label{display:block;margin-bottom:6px;color:var(--text);font-weight:600;font-size:14px}
.form-group input,.form-group textarea{width:100%;padding:11px 12px;border:1px solid var(--line);border-radius:8px;font-size:14px;font-family:inherit;transition:.2s}
.form-group input:focus,.form-group textarea:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-light)}
.form-group textarea{resize:vertical;min-height:110px}
.alert{padding:12px 16px;border-radius:8px;margin-bottom:16px;font-size:14px}
.alert-ok{background:#e8f5e9;color:#2e7d32;border:1px solid #c8e6c9}
.alert-err{background:#fdecea;color:#c62828;border:1px solid #f5c6cb}

/* ===== 侧栏资讯 ===== */
.side-box{background:#fff;border-radius:var(--radius);padding:20px;box-shadow:var(--shadow);margin-bottom:22px}
.side-box h3{font-size:17px;color:var(--primary-dark);margin-bottom:12px;border-left:4px solid var(--primary);padding-left:10px}
.side-news li{margin-bottom:10px;font-size:14px;line-height:1.5}
.side-news li a:hover{color:var(--primary)}
.side-news .d{color:var(--text-3);font-size:12px}

/* ===== 文章详情 ===== */
.detail-head{text-align:center;padding-bottom:20px;border-bottom:1px dashed var(--line);margin-bottom:24px}
.detail-head h1{font-size:26px;color:var(--primary-dark);margin-bottom:10px}
.detail-meta{color:var(--text-3);font-size:13px}
.detail-meta span{margin:0 8px}
.pager{display:flex;justify-content:space-between;margin-top:30px;gap:12px}
.pager a{color:var(--primary);font-size:14px}

/* ===== 后台 ===== */
.admin-body{background:#eef3f8;min-height:100vh}
.login-box{max-width:380px;margin:90px auto;background:#fff;border-radius:12px;box-shadow:var(--shadow);padding:36px}
.login-box h2{text-align:center;color:var(--primary-dark);margin-bottom:24px}
.admin-wrap{display:flex;min-height:100vh}
.admin-side{width:210px;background:var(--grad-deep);color:#fff;padding:20px 0;flex-shrink:0}
.admin-side .brand{padding:0 20px 18px;font-size:18px;font-weight:700;border-bottom:1px solid rgba(255,255,255,.2);margin-bottom:10px}
.admin-side a{display:block;padding:12px 20px;color:#fff;opacity:.9}
.admin-side a:hover,.admin-side a.active{background:rgba(255,255,255,.18);opacity:1}
.admin-main{flex:1;padding:24px}
.admin-card{background:#fff;border-radius:12px;box-shadow:var(--shadow);padding:24px}
.admin-table{width:100%;border-collapse:collapse;font-size:14px}
.admin-table th,.admin-table td{padding:11px 12px;border-bottom:1px solid var(--line);text-align:left}
.admin-table th{background:var(--primary-light);color:var(--primary-dark)}
.admin-table tr:hover{background:#fafcff}
.badge{display:inline-block;padding:2px 10px;border-radius:20px;font-size:12px}
.badge-on{background:#e8f5e9;color:#2e7d32}
.badge-off{background:#fdecea;color:#c62828}
.btn-sm{padding:6px 12px;font-size:13px;border-radius:6px}
.btn-danger{background:#ff5252;color:#fff}
.btn-edit{background:var(--primary);color:#fff}
.btn-default{background:#eee;color:#333}

/* ===== 响应式 ===== */
@media (max-width:1024px){
    .service-grid{grid-template-columns:repeat(3,1fr)}
    .feat-grid,.stats-grid,.price-grid{grid-template-columns:repeat(2,1fr)}
    .news-grid{grid-template-columns:repeat(2,1fr)}
    .contact-grid{grid-template-columns:1fr}
}
@media (max-width:768px){
    .topbar-left{display:none}
    .topbar-inner{justify-content:center}
    .header-inner{height:60px}
    .nav-toggle{display:block}
    .main-nav{display:none;position:absolute;top:60px;left:0;right:0;background:#fff;flex-direction:column;box-shadow:0 8px 20px rgba(0,0,0,.1);padding:8px}
    .main-nav.open{display:flex}
    .main-nav a{padding:12px 16px}
    .hero{padding:54px 0}
    .hero h1{font-size:30px}
    .hero p{font-size:15px}
    .section{padding:40px 0}
    .section-title h2{font-size:24px}
    .service-grid,.feat-grid,.stats-grid,.price-grid,.news-grid{grid-template-columns:1fr}
    .price-card.hot{transform:none}
    .stats-grid{gap:30px}
}
@media (max-width:420px){
    .hero h1{font-size:25px}
    .container{padding:0 12px}
}

/* ===== 底部页脚 ===== */
.site-footer{background:linear-gradient(180deg,#0d47a1 0%,#1565C0 100%);color:#dbeafe}
.footer-cols{display:grid;grid-template-columns:repeat(4,1fr);gap:28px;padding:46px 0 30px}
.footer-col h4{color:#fff;font-size:16px;margin-bottom:16px;position:relative;padding-bottom:9px}
.footer-col h4::after{content:"";position:absolute;left:0;bottom:0;width:28px;height:3px;background:#4FC3F7;border-radius:2px}
.footer-col ul li{margin-bottom:9px;font-size:14px;line-height:1.6}
.footer-col a:hover{color:#4FC3F7}
.footer-contact li{color:#dbeafe}
.qr-box{width:112px;height:112px;background:rgba(255,255,255,.14);border:1px dashed rgba(255,255,255,.55);border-radius:8px;display:flex;align-items:center;justify-content:center;text-align:center;font-size:12px;color:#fff;margin-bottom:8px;line-height:1.5}
.footer-tip{font-size:12px;opacity:.85}
.footer-bottom{border-top:1px solid rgba(255,255,255,.16);padding:16px 0;font-size:13px;text-align:center;color:#bbdefb}
.footer-bottom p{margin:4px 0}
.footer-bottom a{color:#fff}
.footer-bottom a:hover{color:#4FC3F7}

/* 页脚响应式 */
@media (max-width:1024px){
    .footer-cols{grid-template-columns:repeat(2,1fr);gap:24px}
}
@media (max-width:480px){
    .footer-cols{grid-template-columns:1fr;gap:22px;padding:36px 0 24px}
}