/*! 腾树检测全站基础样式 base.css | 纯 SEO 极简版 */
:root{
    --primary:#0066cc;
    --primary-dark:#0056b3;
    --primary-light:#e3f2fd;
    --secondary:#16a34a;
    --accent:#ff7043;
    --text:#1a1a2e;
    --text-soft:#475569;
    --text-muted:#94a3b8;
    --bg:#ffffff;
    --bg-soft:#f8fafc;
    --bg-card:#ffffff;
    --border:#e2e8f0;
    --border-soft:#f1f5f9;
    --danger:#dc2626;
    --warning:#f59e0b;
    --radius-sm:6px;
    --radius:10px;
    --radius-lg:16px;
    --shadow-sm:0 2px 8px rgba(0,0,0,.06);
    --shadow:0 8px 24px rgba(0,0,0,.08);
    --shadow-lg:0 16px 48px rgba(0,0,0,.12);
    --maxw:1200px;
    --font:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
    margin:0;
    font-family:var(--font);
    font-size:16px;
    line-height:1.7;
    color:var(--text);
    background:var(--bg);
    -webkit-font-smoothing:antialiased;
    text-rendering:optimizeLegibility;
}
img,video,svg{max-width:100%;height:auto;display:block}
img{vertical-align:middle}
a{color:var(--primary);text-decoration:none;transition:color .2s}
a:hover{color:var(--primary-dark);text-decoration:underline}
a:focus-visible{outline:3px solid var(--primary-light);outline-offset:2px}
h1,h2,h3,h4,h5,h6{margin:0 0 .5em;line-height:1.3;font-weight:600;color:var(--text)}
h1{font-size:clamp(24px,4vw,34px)}
h2{font-size:clamp(20px,3vw,26px)}
h3{font-size:clamp(17px,2.4vw,20px)}
h4{font-size:16px}
p{margin:0 0 1em}
ul,ol{margin:0 0 1em;padding-left:1.5em}
li{margin-bottom:.3em}
.container{max-width:var(--maxw);margin:0 auto;padding:0 20px}
.skip-link{position:absolute;left:-9999px;top:0;background:var(--primary);color:#fff;padding:10px 16px;z-index:9999;border-radius:0 0 var(--radius-sm) 0}
.skip-link:focus{left:0}

/* ===== Header ===== */
.site-header{position:sticky;top:0;z-index:900;background:#fff;box-shadow:var(--shadow-sm)}
.topbar{background:linear-gradient(90deg,#0a1929 0%,#162d50 100%);color:#cbd5e1;font-size:13px;padding:8px 0}
.topbar-inner{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap}
.topbar-welcome{color:#cbd5e1}
.topbar-links{display:flex;gap:18px;flex-wrap:wrap}
.topbar-links a{color:#cbd5e1}
.topbar-links a:hover{color:#00d4ff;text-decoration:none}
.topbar-links i{margin-right:6px}
.navbar{background:#fff;border-bottom:1px solid var(--border)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:64px;gap:20px}
.logo{display:flex;align-items:center;gap:8px;font-size:22px;font-weight:700;color:#0a1929}
.logo i{color:var(--primary)}
.logo:hover{text-decoration:none}
.nav-list{display:flex;gap:28px;list-style:none;margin:0;padding:0}
.nav-list a{color:var(--text-soft);font-size:15px;padding:8px 0;position:relative;font-weight:500}
.nav-list a:hover,.nav-list a.active{color:var(--primary);text-decoration:none}
.nav-list a.active::after{content:"";position:absolute;left:0;right:0;bottom:-6px;height:3px;background:var(--primary);border-radius:2px}
.nav-phone{color:var(--primary);font-weight:700;font-size:16px;white-space:nowrap}
.nav-phone i{margin-right:6px}
.nav-toggle{display:none;background:none;border:0;font-size:22px;color:var(--text);cursor:pointer;padding:8px}

/* ===== Breadcrumb ===== */
.breadcrumb{background:var(--bg-soft);border-bottom:1px solid var(--border-soft);padding:12px 0;font-size:14px;color:var(--text-muted)}
.breadcrumb .container{display:flex;flex-wrap:wrap;align-items:center}
.breadcrumb a{color:var(--text-soft)}
.breadcrumb a:hover{color:var(--primary);text-decoration:none}
.breadcrumb .sep{margin:0 8px;color:#cbd5e1}
.breadcrumb .current{color:var(--text);font-weight:500}

/* ===== Main ===== */
.main{min-height:60vh;display:block}
.section{padding:48px 0}
.section-sm{padding:32px 0}
.section-title{margin-bottom:32px;text-align:center}
.section-title h2{margin-bottom:8px}
.section-title h2::after{content:"";display:block;width:48px;height:3px;background:linear-gradient(90deg,var(--primary),#00d4ff);border-radius:2px;margin:12px auto 0}
.section-title .sub{color:var(--text-muted);font-size:15px}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;margin-bottom:24px;gap:16px;flex-wrap:wrap}
.section-head h2{margin:0}
.section-head .more{font-size:14px;color:var(--primary)}

/* ===== Hero ===== */
.hero{background:linear-gradient(135deg,#0a1929 0%,#162d50 60%,#0066cc 100%);color:#fff;padding:60px 0 70px;text-align:center}
.hero h1{color:#fff;margin-bottom:16px}
.hero .lead{font-size:18px;opacity:.95;max-width:780px;margin:0 auto 28px;line-height:1.8}
.hero-cta{display:flex;gap:16px;justify-content:center;flex-wrap:wrap;margin-bottom:24px}
.hero-badges{display:flex;gap:24px;justify-content:center;flex-wrap:wrap;color:#cbd5e1;font-size:14px}
.hero-badges span{display:inline-flex;align-items:center;gap:6px}
.hero-badges i{color:#00d4ff}

/* ===== Buttons ===== */
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 28px;border-radius:var(--radius-sm);font-size:15px;font-weight:600;cursor:pointer;border:2px solid transparent;transition:all .2s;text-decoration:none;line-height:1.2}
.btn:hover{text-decoration:none;transform:translateY(-2px)}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-dark);color:#fff}
.btn-outline{background:transparent;color:#fff;border-color:rgba(255,255,255,.6)}
.btn-outline:hover{background:#fff;color:var(--primary)}
.btn-ghost{background:var(--primary-light);color:var(--primary)}
.btn-ghost:hover{background:var(--primary);color:#fff}
.btn-lg{padding:14px 36px;font-size:16px}

/* ===== Card Grid ===== */
.card-grid{display:grid;gap:20px;grid-template-columns:repeat(auto-fill,minmax(260px,1fr))}
.card-grid.cols-2{grid-template-columns:repeat(auto-fill,minmax(360px,1fr))}
.card-grid.cols-3{grid-template-columns:repeat(auto-fill,minmax(280px,1fr))}
.card-grid.cols-4{grid-template-columns:repeat(auto-fill,minmax(240px,1fr))}
.card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:24px;transition:box-shadow .25s,transform .25s,border-color .25s;display:flex;flex-direction:column;height:100%}
.card:hover{box-shadow:var(--shadow-lg);transform:translateY(-6px);border-color:var(--primary-light)}
.card-icon{width:48px;height:48px;border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:22px;color:#fff;margin-bottom:14px}
.card-title{font-size:17px;font-weight:600;margin-bottom:8px}
.card-title a{color:var(--text)}
.card-title a:hover{color:var(--primary);text-decoration:none}
.card-desc{color:var(--text-soft);font-size:14px;flex:1}
.card-link{margin-top:14px;font-size:14px;color:var(--primary);font-weight:500}
.card-tag{display:inline-block;background:var(--primary-light);color:var(--primary);font-size:12px;padding:3px 10px;border-radius:999px;margin:0 6px 6px 0}
.card-meta{font-size:13px;color:var(--text-muted);margin-top:10px}
.card-meta i{margin-right:4px}

/* ===== Tables ===== */
.table{width:100%;border-collapse:collapse;background:#fff;border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}
.table th,.table td{padding:12px 16px;text-align:left;border-bottom:1px solid var(--border-soft);font-size:14px}
.table th{background:var(--bg-soft);font-weight:600;color:var(--text)}
.table tr:last-child td{border-bottom:0}
.table tr:hover{background:var(--bg-soft)}

/* ===== Standard / Article layout ===== */
.page-header{background:linear-gradient(135deg,#0a1929 0%,#162d50 60%,#1a3a6e 100%);color:#fff;padding:48px 0 56px;border-bottom:none;position:relative;overflow:hidden}
.page-header::after{content:"";position:absolute;bottom:0;left:0;right:0;height:4px;background:linear-gradient(90deg,var(--primary) 0%,#00d4ff 50%,var(--primary) 100%)}
.page-header h1{color:#fff;margin-bottom:10px;font-size:clamp(24px,4vw,36px);font-weight:700}
.page-header .lead{color:rgba(255,255,255,.88);font-size:16px;max-width:820px;line-height:1.7}
.page-header .hero-badges span{color:rgba(255,255,255,.85)}
.page-header .hero-badges i{color:#00d4ff}
.article-body{font-size:16px;line-height:1.85}
.article-body h2{margin-top:1.8em;margin-bottom:.6em;padding-bottom:.3em;border-bottom:1px solid var(--border-soft)}
.article-body h3{margin-top:1.4em;margin-bottom:.5em}
.article-body p{margin-bottom:1em}
.article-body ul,.article-body ol{margin-bottom:1em}
.article-body li{margin-bottom:.4em}
.article-meta{color:var(--text-muted);font-size:14px;margin-bottom:24px;padding-bottom:16px;border-bottom:1px solid var(--border-soft)}
.article-meta span{margin-right:18px}
.article-meta i{margin-right:5px}

/* ===== Info Table (标准详情) ===== */
.info-table{width:100%;border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;margin-bottom:24px}
.info-table dl{display:grid;grid-template-columns:160px 1fr;margin:0}
.info-table dl > div{display:contents}
.info-table dt,.info-table dd{padding:12px 16px;border-bottom:1px solid var(--border-soft);font-size:14px;margin:0}
.info-table dt{background:var(--bg-soft);font-weight:600;color:var(--text-soft)}
.info-table dl > div:last-child dt,.info-table dl > div:last-child dd{border-bottom:0}
@media(max-width:600px){.info-table dl{grid-template-columns:120px 1fr}}

/* ===== Tag cloud ===== */
.tag-cloud{display:flex;flex-wrap:wrap;gap:8px;margin:8px 0 16px}
.tag-cloud .tag{background:var(--primary-light);color:var(--primary-dark);font-size:13px;padding:5px 12px;border-radius:999px}

/* ===== Process steps ===== */
.process-grid{display:grid;gap:20px;grid-template-columns:repeat(auto-fit,minmax(160px,1fr))}
.process-step{background:var(--bg-soft);border:1px solid var(--border);border-radius:var(--radius);padding:20px;text-align:center;position:relative}
.process-step .step-num{width:36px;height:36px;background:var(--primary);color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;margin:0 auto 10px}
.process-step h4{margin-bottom:6px}
.process-step p{font-size:13px;color:var(--text-soft);margin:0}

/* ===== FAQ ===== */
.faq-list{margin:0;padding:0;list-style:none}
.faq-list > li{list-style:none;margin-bottom:12px}
.faq-item{background:#fff;border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}
.faq-item > summary{padding:16px 20px;font-weight:600;cursor:pointer;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:12px}
.faq-item > summary::-webkit-details-marker{display:none}
.faq-item > summary::after{content:"\f078";font-family:"Font Awesome 6 Free";font-weight:900;font-size:13px;color:var(--text-muted);transition:transform .2s}
.faq-item[open] > summary::after{transform:rotate(180deg)}
.faq-item .faq-answer{padding:0 20px 16px;color:var(--text-soft);font-size:14px;line-height:1.7}

/* ===== Forms ===== */
.form-grid{display:grid;gap:16px;grid-template-columns:repeat(2,1fr)}
.form-group{display:flex;flex-direction:column}
.form-group.full{grid-column:1/-1}
.form-group label{font-weight:500;margin-bottom:6px;font-size:14px}
.form-group input,.form-group select,.form-group textarea{
    padding:10px 12px;border:1px solid var(--border);border-radius:var(--radius-sm);font-size:14px;font-family:inherit;background:#fff
}
.form-group input:focus,.form-group select:focus,.form-group textarea:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-light)}
.form-group textarea{min-height:120px;resize:vertical}

/* ===== CTA band ===== */
.cta-band{background:linear-gradient(135deg,#0a1929 0%,#0066cc 50%,#0056b3 100%);color:#fff;padding:56px 0;text-align:center;position:relative;overflow:hidden}
.cta-band h2{color:#fff;margin-bottom:12px}
.cta-band p{opacity:.95;margin-bottom:24px}
.cta-band .btn-primary{background:#fff;color:var(--primary)}
.cta-band .btn-primary:hover{background:#f8fafc;color:var(--primary-dark)}

/* ===== Floating CTA ===== */
.floating-cta{position:fixed;right:20px;bottom:24px;z-index:800;display:flex;flex-direction:column;gap:10px}
.float-btn{width:52px;height:52px;border-radius:50%;display:flex;align-items:center;justify-content:center;color:#fff;font-size:20px;box-shadow:var(--shadow);transition:transform .2s}
.float-btn:hover{transform:scale(1.08);text-decoration:none}
.float-phone{background:var(--primary)}
.float-wechat{background:#07c160}

/* ===== Footer ===== */
.site-footer{background:#0a1929;color:#94a3b8;padding:48px 0 0;margin-top:60px}
.footer-grid{display:grid;gap:32px;grid-template-columns:1.6fr 1fr 1fr 1fr;padding-bottom:32px}
.footer-col{font-size:14px}
.footer-title{color:#fff;margin-bottom:14px;font-size:15px}
.footer-col.footer-about .footer-title{font-size:20px}
.footer-desc{color:#94a3b8;line-height:1.7;margin-bottom:12px}
.footer-contact{margin-bottom:6px;color:#cbd5e1}
.footer-contact i{margin-right:6px;color:#00d4ff}
.footer-links{list-style:none;margin:0;padding:0}
.footer-links li{margin-bottom:8px}
.footer-links a{color:#94a3b8;font-size:14px}
.footer-links a:hover{color:#00d4ff;text-decoration:none}
.footer-bottom{border-top:1px solid #1e293b;padding:20px 0;text-align:center;font-size:13px}
.footer-bottom p{margin:0 0 6px}
.footer-bottom a{color:#94a3b8}
.footer-bottom a:hover{color:#00d4ff;text-decoration:none}
.footer-bottom .sep{margin:0 8px;color:#475569}

/* ===== Search form ===== */
.search-form{display:flex;gap:10px;max-width:640px;margin:0 auto}
.search-form input{flex:1;padding:14px 18px;border:2px solid var(--border);border-radius:var(--radius-sm);font-size:15px;font-family:inherit}
.search-form input:focus{outline:none;border-color:var(--primary)}
.search-form button{padding:0 28px;background:var(--primary);color:#fff;border:0;border-radius:var(--radius-sm);font-size:15px;font-weight:600;cursor:pointer}
.search-form button:hover{background:var(--primary-dark)}

/* ===== Hero stat / quick links ===== */
.quick-links{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px;justify-content:center}
.quick-links a{background:rgba(255,255,255,.12);color:#fff;padding:6px 14px;border-radius:999px;font-size:13px}
.quick-links a:hover{background:rgba(255,255,255,.22);text-decoration:none}

/* ===== Generic list ===== */
.list-compact{list-style:none;padding:0;margin:0}
.list-compact li{padding:8px 0;border-bottom:1px solid var(--border-soft);font-size:14px}
.list-compact li:last-child{border-bottom:0}
.list-compact a{color:var(--text)}
.list-compact a:hover{color:var(--primary);text-decoration:none}

/* ===== Pagination ===== */
.pagination{display:flex;gap:6px;justify-content:center;margin-top:32px;flex-wrap:wrap}
.pagination a,.pagination span{padding:8px 14px;border:1px solid var(--border);border-radius:var(--radius-sm);font-size:14px;background:#fff}
.pagination a:hover{background:var(--primary-light);text-decoration:none}
.pagination .current{background:var(--primary);color:#fff;border-color:var(--primary)}

/* ===== Section alternates ===== */
.bg-soft{background:var(--bg-soft)}
.bg-white{background:#fff}
.text-center{text-align:center}

/* ===== Highlight / badge ===== */
.badge{display:inline-block;font-size:12px;padding:3px 10px;border-radius:999px;font-weight:500}
.badge-success{background:#dcfce7;color:#16a34a}
.badge-warning{background:#fef3c7;color:#d97706}
.badge-info{background:#dbeafe;color:#2563eb}
.badge-danger{background:#fee2e2;color:#dc2626}

/* ===== Responsive ===== */
.article-layout{display:grid;grid-template-columns:1fr 300px;gap:32px;align-items:start}
.article-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:32px}
@media(max-width:1024px){
    .footer-grid{grid-template-columns:1fr 1fr}
    .article-layout{grid-template-columns:1fr}
}
@media(max-width:768px){
    .nav-list{
        position:absolute;top:64px;left:0;right:0;background:#fff;
        flex-direction:column;gap:0;padding:12px 20px;border-bottom:1px solid var(--border);
        box-shadow:var(--shadow);display:none
    }
    .nav-list.show{display:flex}
    .nav-list li{padding:8px 0;border-bottom:1px solid var(--border-soft)}
    .nav-list li:last-child{border-bottom:0}
    .nav-toggle{display:block}
    .nav-phone{display:none}
    .topbar-welcome{display:none}
    .topbar-inner{justify-content:center}
    .footer-grid{grid-template-columns:1fr;gap:24px}
    .form-grid{grid-template-columns:1fr}
    .section{padding:32px 0}
    .hero{padding:40px 0 50px}
    .floating-cta{right:12px;bottom:16px}
    .float-btn{width:46px;height:46px;font-size:18px}
}
@media(prefers-reduced-motion:reduce){
    *{animation-duration:.001s!important;transition-duration:.001s!important;scroll-behavior:auto!important}
}