/* ============================================
   CertFastLine Design System
   Brand: 深圳市普华智科技术有限公司
   ============================================ */

/* ---- CSS Custom Properties ---- */
:root {
  --primary: #1a56db;
  --primary-dark: #1e40af;
  --primary-light: #dbeafe;
  --accent: #0ea5e9;
  --accent-light: #e0f2fe;
  --bg: #f8fafc;
  --text: #1e293b;
  --text-muted: #64748b;
  --card: #ffffff;
  --border: #e2e8f0;
  --success: #059669;
  --success-light: #d1fae5;
  --warning: #f59e0b;
  --warning-light: #ffedd5;
  --danger: #dc2626;
  --radius: 10px;
  --shadow: 0 4px 24px rgba(0,0,0,0.08);
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --nav-h: 64px;
}

/* ---- Reset ---- */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans SC",sans-serif;
  color:var(--text);background:var(--bg);line-height:1.7;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--primary);text-decoration:none}
a:hover{text-decoration:underline}

/* ---- Layout ---- */
.wrap{max-width:1100px;margin:0 auto;padding:0 24px}
@media(max-width:640px){.wrap{padding:0 16px}}

/* ---- Navigation ---- */
nav{
  background:var(--card);border-bottom:1px solid var(--border);
  position:sticky;top:0;z-index:100;
}
nav .wrap{display:flex;align-items:center;justify-content:space-between;height:var(--nav-h)}
nav .logo{font-size:18px;font-weight:700;color:var(--primary);text-decoration:none;white-space:nowrap;letter-spacing:-0.3px}
nav .logo span{color:var(--primary);font-weight:400;font-size:14px;margin-left:4px;letter-spacing:0.5px}
nav .nav-links{display:flex;align-items:center;gap:6px;list-style:none}
nav .nav-links a{color:var(--text-muted);font-size:14px;padding:8px 12px;border-radius:6px;text-decoration:none;transition:all .15s}
nav .nav-links a:hover{color:var(--primary);background:var(--primary-light);text-decoration:none}
nav .nav-links a.active{color:var(--primary);font-weight:600}
nav .nav-links a.nav-ccrc.active{color:#fff;font-weight:600}
nav .nav-ccrc{background:linear-gradient(135deg,#dc2626,#b91c1c);color:#fff!important;padding:6px 14px;border-radius:6px;font-size:13px;font-weight:600;text-decoration:none;white-space:nowrap;animation:pulse-ccrc 2s infinite}
nav .nav-ccrc:hover{background:linear-gradient(135deg,#b91c1c,#991b1b);text-decoration:none}
@keyframes pulse-ccrc{0%,100%{box-shadow:0 0 0 0 rgba(220,38,38,0.4)}50%{box-shadow:0 0 0 6px rgba(220,38,38,0)}}
nav .nav-phone{background:var(--primary);color:#fff!important;padding:8px 18px;border-radius:6px;font-size:14px;font-weight:500;text-decoration:none;white-space:nowrap}
nav .nav-phone:hover{background:var(--primary-dark);text-decoration:none}

/* Dropdown */
nav .dropdown{position:relative}
nav .dropdown:hover .dropdown-menu{display:block}
nav .dropdown-menu{
  display:none;position:absolute;top:100%;left:0;padding-top:6px;min-width:180px;z-index:200
}
nav .dropdown-menu-inner{
  background:var(--card);border:1px solid var(--border);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:8px;list-style:none
}
nav .dropdown-menu a{display:block;padding:8px 14px;font-size:14px;white-space:nowrap;border-radius:6px}
nav .dropdown-menu a:hover{background:var(--bg)}

/* Hamburger */
nav .hamburger{display:none;background:none;border:none;cursor:pointer;padding:4px}
nav .hamburger span{display:block;width:22px;height:2px;background:var(--text);margin:5px 0;border-radius:2px;transition:.2s}
@media(max-width:860px){
  nav .nav-links{display:none;position:absolute;top:var(--nav-h);left:0;right:0;
    background:var(--card);border-bottom:1px solid var(--border);flex-direction:column;
    padding:12px 24px;gap:4px;box-shadow:var(--shadow)
  }
  nav .nav-links.open{display:flex}
  nav .nav-links .dropdown-menu{position:static;padding:0}
  nav .nav-links .dropdown-menu-inner{box-shadow:none;border:none;padding-left:16px}
  nav .hamburger{display:block}
  nav .nav-ccrc{font-size:12px;padding:4px 10px}
  nav .nav-phone{font-size:13px;padding:6px 14px}
}

/* ---- Hero ---- */
.hero{
  background:linear-gradient(135deg,#0f172a 0%,#1e3a5f 50%,#0a1628 100%);
  color:#fff;padding:80px 24px 64px;text-align:center;position:relative;overflow:hidden;
}
.hero::before{
  content:"";position:absolute;top:-30%;right:-10%;width:500px;height:500px;
  background:radial-gradient(circle,rgba(14,165,233,.12) 0%,transparent 70%);
}
.hero .wrap{position:relative;z-index:1}
.hero .badge{display:inline-block;background:rgba(14,165,233,.2);border:1px solid rgba(14,165,233,.4);color:#7dd3fc;padding:6px 16px;border-radius:20px;font-size:13px;margin-bottom:20px}
.hero h1{font-size:clamp(28px,5vw,42px);font-weight:800;line-height:1.3;margin-bottom:16px}
.hero h1 em{font-style:normal;color:#38bdf8}
.hero p.sub{font-size:17px;color:#94a3b8;max-width:600px;margin:0 auto 32px}
.hero .btns{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}

/* ---- Buttons ---- */
.btn{display:inline-block;padding:12px 28px;border-radius:8px;font-size:15px;font-weight:600;text-decoration:none;cursor:pointer;border:none;transition:transform .15s,box-shadow .15s;text-align:center}
.btn:hover{transform:translateY(-1px);text-decoration:none}
.btn-primary{background:var(--primary);color:#fff!important}
.btn-primary:hover{background:var(--primary-dark);box-shadow:0 4px 12px rgba(26,86,219,.35)}
.btn-secondary{background:rgba(255,255,255,.15);color:#fff;border:1px solid rgba(255,255,255,.25)}
.btn-secondary:hover{background:rgba(255,255,255,.25)}
.btn-outline{background:transparent;color:var(--primary);border:2px solid var(--primary)}
.btn-outline:hover{background:var(--primary-light)}
.btn-white{background:#fff;color:var(--primary)!important;font-weight:600}
.btn-sm{padding:8px 16px;font-size:14px}

/* ---- Sections ---- */
section{padding:64px 24px}
section h2{font-size:clamp(24px,4vw,30px);font-weight:700;text-align:center;margin-bottom:12px}
.sec-sub{text-align:center;color:var(--text-muted);margin-bottom:40px;font-size:15px}
.sec-label{text-align:center;color:var(--primary);font-weight:600;font-size:14px;text-transform:uppercase;letter-spacing:.05em;margin-bottom:4px}
.section-alt{background:var(--card)}

/* ---- Cards ---- */
.card-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:20px;margin-top:24px}
.card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:28px;transition:box-shadow .2s,transform .15s}
.card:hover{box-shadow:var(--shadow);transform:translateY(-2px)}
.card .icon{width:44px;height:44px;border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:20px;margin-bottom:14px;flex-shrink:0}
.card h3{font-size:17px;margin-bottom:8px}
.card p,.card-desc{color:var(--text-muted);font-size:14px;line-height:1.6}
.card-link{display:inline-flex;align-items:center;gap:4px;font-size:14px;font-weight:600;margin-top:12px;color:var(--primary);text-decoration:none}
.card-link:hover{text-decoration:underline}

/* Icon colors */
.icon-blue{background:var(--primary-light);color:var(--primary)}
.icon-green{background:var(--success-light);color:var(--success)}
.icon-orange{background:var(--warning-light);color:#ea580c}
.icon-purple{background:#ede9fe;color:#7c3aed}
.icon-red{background:#fee2e2;color:var(--danger)}

/* ---- Table ---- */
.table-wrap{overflow-x:auto;margin:24px 0}
table{width:100%;border-collapse:collapse;background:var(--card);border-radius:var(--radius);overflow:hidden;border:1px solid var(--border)}
table th{background:#f1f5f9;padding:12px 16px;text-align:left;font-size:13px;font-weight:600;color:var(--text-muted);white-space:nowrap}
table td{padding:12px 16px;border-top:1px solid var(--border);font-size:14px}
table tr:hover td{background:var(--bg)}

/* ---- Process Steps ---- */
.process{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:16px;margin:24px 0}
.process .step{text-align:center;padding:24px 16px;background:var(--card);border:1px solid var(--border);border-radius:var(--radius)}
.process .step .num{width:36px;height:36px;border-radius:50%;background:var(--primary);color:#fff;display:flex;align-items:center;justify-content:center;margin:0 auto 12px;font-weight:700;font-size:15px}
.process .step h4{font-size:15px;margin-bottom:6px}
.process .step p{font-size:13px;color:var(--text-muted);line-height:1.5}

/* ---- Stats ---- */
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:0;margin:-1px -1px 0;background:var(--card);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}
.stats .stat-item{text-align:center;padding:24px 16px;border-right:1px solid var(--border)}
.stats .stat-item:last-child{border-right:none}
.stats .stat-value{font-size:28px;font-weight:800;color:var(--primary)}
.stats .stat-label{font-size:13px;color:var(--text-muted);margin-top:4px}

/* ---- CTA Block ---- */
.cta-block{background:linear-gradient(135deg,var(--primary),#1e3a5f);color:#fff;text-align:center;padding:48px 24px;border-radius:12px;margin:24px 0}
.cta-block h3{font-size:clamp(20px,3vw,26px);margin-bottom:8px}
.cta-block p{color:#bfdbfe;margin-bottom:24px}
.cta-block .btn-white{margin:0 8px 8px}

/* ---- FAQ ---- */
.faq-item{background:var(--card);border:1px solid var(--border);border-radius:8px;padding:18px 24px;margin-bottom:12px}
.faq-item h4{font-size:16px;margin-bottom:6px;color:var(--primary);cursor:pointer}
.faq-item p{font-size:14px;color:var(--text-muted)}
details.faq-item summary{cursor:pointer;font-size:16px;color:var(--primary);font-weight:600;list-style:none;display:flex;justify-content:space-between;align-items:center}
details.faq-item summary::-webkit-details-marker{display:none}
details.faq-item summary::after{content:"+";font-size:20px;font-weight:400;color:var(--text-muted)}
details.faq-item[open] summary::after{content:"−"}
details.faq-item .faq-answer{margin-top:12px;font-size:14px;color:var(--text-muted);line-height:1.7}
details.faq-item[open]{padding-bottom:20px}

/* ---- Contact Form ---- */
.form-group{margin-bottom:16px}
.form-group label{display:block;font-size:14px;font-weight:500;margin-bottom:6px;color:var(--text)}
.form-group input,.form-group textarea,.form-group select{
  width:100%;padding:10px 14px;border:1px solid var(--border);border-radius:8px;
  font-size:14px;font-family:inherit;background:var(--card);transition:border-color .15s
}
.form-group input:focus,.form-group textarea:focus,.form-group select:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-light)}
.form-group textarea{min-height:120px;resize:vertical}

/* ---- Breadcrumb ---- */
.breadcrumb{font-size:13px;color:var(--text-muted);margin-bottom:24px;padding:24px 24px 0}
.breadcrumb a{color:var(--text-muted);text-decoration:none}
.breadcrumb a:hover{color:var(--primary)}
.breadcrumb span{color:var(--text)}

/* ---- Page Header ---- */
.page-header{text-align:center;padding:48px 24px 40px;background:var(--card);border-bottom:1px solid var(--border)}
.page-header h1{font-size:clamp(26px,4vw,34px);font-weight:800;margin-bottom:12px}
.page-header p{color:var(--text-muted);font-size:16px;max-width:600px;margin:0 auto}
.page-header .badge{margin-bottom:12px}

/* ---- Alert / Note ---- */
.note{border-left:4px solid var(--accent);background:var(--accent-light);padding:16px 20px;border-radius:0 8px 8px 0;margin:16px 0;font-size:14px;color:var(--text)}

/* ---- Tag / Badge ---- */
.tag{display:inline-block;padding:4px 12px;border-radius:16px;font-size:12px;font-weight:500}
.tag-blue{background:var(--primary-light);color:var(--primary)}
.tag-green{background:var(--success-light);color:var(--success)}
.tag-gray{background:#f1f5f9;color:var(--text-muted)}

/* ---- Two Column ---- */
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:start}
@media(max-width:768px){.two-col{grid-template-columns:1fr}}

/* ---- Footer ---- */
footer{background:#0f172a;color:#94a3b8;padding:40px 24px;text-align:center;font-size:14px}
footer a{color:#38bdf8;text-decoration:none}
footer .footer-links{display:flex;justify-content:center;gap:24px;flex-wrap:wrap;margin-bottom:16px}
footer .footer-divider{margin:16px 0;border-top:1px solid rgba(255,255,255,.08)}
footer .footer-info{max-width:500px;margin:0 auto;line-height:1.8}

/* ---- Utils ---- */
.text-center{text-align:center}
.mt-0{margin-top:0}
.mt-8{margin-top:8px}
.mt-16{margin-top:16px}
.mt-24{margin-top:24px}
.mt-32{margin-top:32px}
.mb-0{margin-bottom:0}
.mb-8{margin-bottom:8px}
.mb-16{margin-bottom:16px}
.mb-24{margin-bottom:24px}
.hidden{display:none!important}
.text-muted{color:var(--text-muted)}
.text-sm{font-size:14px}

/* ---- Print / QR ---- */
@media print{
  nav,footer,.cta-block,.btns{display:none}
  body{font-size:12pt;color:#000}
}