/* ===== 驰云信息服务部 · 前台样式 ===== */
:root{
  --primary:#1a56db;
  --primary-dark:#1e40af;
  --primary-light:#3b82f6;
  --accent:#06b6d4;
  --dark:#0b1526;
  --dark-2:#0f1e35;
  --text:#1f2937;
  --text-light:#6b7280;
  --bg:#ffffff;
  --bg-alt:#f5f8fd;
  --border:#e5e9f0;
  --radius:14px;
  --shadow:0 10px 40px rgba(16,42,90,.08);
  --shadow-lg:0 20px 60px rgba(16,42,90,.14);
  --grad:linear-gradient(120deg,#1a56db 0%,#06b6d4 100%);
  --max:1200px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;color:var(--text);background:var(--bg);line-height:1.7;-webkit-font-smoothing:antialiased}
a{text-decoration:none;color:inherit}
img{max-width:100%;display:block}
.container{max-width:var(--max);margin:0 auto;padding:0 24px}

/* ===== 按钮 ===== */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:13px 30px;border-radius:10px;font-size:15px;font-weight:600;cursor:pointer;border:none;transition:.25s;white-space:nowrap}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 8px 24px rgba(26,86,219,.32)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 30px rgba(26,86,219,.42)}
.btn-ghost{background:rgba(255,255,255,.12);color:#fff;border:1px solid rgba(255,255,255,.35);backdrop-filter:blur(4px)}
.btn-ghost:hover{background:rgba(255,255,255,.22)}
.btn-outline{background:transparent;color:var(--primary);border:1.5px solid var(--primary)}
.btn-outline:hover{background:var(--primary);color:#fff}
.btn-light{background:#fff;color:var(--primary)}
.btn-light:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg)}
.btn-block{display:flex;width:100%}
.center-btn{text-align:center;margin-top:44px}

/* ===== 顶部导航 ===== */
.site-header{position:fixed;top:0;left:0;right:0;z-index:1000;transition:.3s;padding:18px 0}
.site-header.scrolled{background:rgba(255,255,255,.96);box-shadow:0 4px 20px rgba(0,0,0,.06);padding:12px 0;backdrop-filter:blur(10px)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:20px}
.logo{display:flex;align-items:center;gap:12px}
.logo-mark{width:44px;height:44px;border-radius:11px;background:var(--grad);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:17px;box-shadow:0 6px 18px rgba(26,86,219,.35)}
.logo-text{display:flex;flex-direction:column;line-height:1.25}
.logo-text strong{font-size:18px;color:#fff;transition:.3s}
.logo-text em{font-size:11px;color:rgba(255,255,255,.75);font-style:normal;transition:.3s}
.scrolled .logo-text strong{color:var(--dark)}
.scrolled .logo-text em{color:var(--text-light)}
.main-nav{display:flex;gap:6px}
.main-nav a{padding:9px 16px;border-radius:8px;font-size:15px;font-weight:500;color:rgba(255,255,255,.9);transition:.2s}
.main-nav a:hover,.main-nav a.active{background:rgba(255,255,255,.16);color:#fff}
.scrolled .main-nav a{color:var(--text)}
.scrolled .main-nav a:hover,.scrolled .main-nav a.active{background:rgba(26,86,219,.1);color:var(--primary)}
.btn-nav-contact{padding:10px 22px;border-radius:8px;background:var(--grad);color:#fff;font-size:14px;font-weight:600;transition:.25s}
.btn-nav-contact:hover{transform:translateY(-2px);box-shadow:0 8px 20px rgba(26,86,219,.4)}
.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:6px}
.nav-toggle span{width:26px;height:2.5px;background:#fff;border-radius:2px;transition:.3s}
.scrolled .nav-toggle span{background:var(--dark)}

/* ===== Hero ===== */
.hero{position:relative;padding:170px 0 80px;overflow:hidden;background:var(--dark)}
.hero-bg{position:absolute;inset:0;background:
  radial-gradient(circle at 15% 20%,rgba(26,86,219,.55),transparent 45%),
  radial-gradient(circle at 85% 15%,rgba(6,182,212,.4),transparent 45%),
  linear-gradient(160deg,#0b1526 0%,#0f2440 60%,#0b1526 100%);}
.hero-bg::after{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);background-size:56px 56px;mask-image:radial-gradient(circle at 50% 40%,#000,transparent 75%)}
.hero-inner{position:relative;z-index:2;padding:40px 0 70px}
.hero-tag{display:inline-block;padding:7px 18px;border-radius:30px;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.2);color:#8ecbff;font-size:13px;letter-spacing:.5px;margin-bottom:26px}
.hero-text h1{font-size:54px;line-height:1.2;color:#fff;font-weight:800;letter-spacing:-.5px}
.hero-text h1 .grad{background:linear-gradient(120deg,#38bdf8,#818cf8);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-text p{color:rgba(255,255,255,.7);font-size:18px;margin:24px 0 36px;max-width:620px}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap}
/* 统计条 */
.stat-bar{position:relative;z-index:2;display:grid;grid-template-columns:repeat(4,1fr);background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.12);border-radius:18px;padding:30px 10px;backdrop-filter:blur(8px)}
.stat-item{text-align:center;color:#fff;padding:6px 12px;position:relative}
.stat-item+.stat-item::before{content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);height:44px;width:1px;background:rgba(255,255,255,.12)}
.stat-item b{display:block;font-size:42px;font-weight:800;line-height:1;background:linear-gradient(120deg,#38bdf8,#818cf8);-webkit-background-clip:text;background-clip:text;color:transparent}
.stat-item span{display:block;font-size:14px;color:rgba(255,255,255,.6);margin-top:10px;letter-spacing:.5px}

/* ===== 通用区块 ===== */
.section{padding:100px 0}
.section-alt{background:var(--bg-alt)}
.section-head{text-align:center;max-width:640px;margin:0 auto 60px}
.eyebrow{display:inline-block;font-size:13px;font-weight:700;letter-spacing:2px;color:var(--primary);margin-bottom:14px}
.section-head h2{font-size:38px;font-weight:800;color:var(--dark);letter-spacing:-.5px}
.section-head p{color:var(--text-light);font-size:17px;margin-top:14px}

/* ===== 服务卡片 ===== */
.service-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:26px}
.service-detail-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:30px}
.service-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:38px 30px;transition:.3s;position:relative;overflow:hidden;display:block}
.service-card::before{content:"";position:absolute;top:0;left:0;right:0;height:4px;background:var(--grad);transform:scaleX(0);transform-origin:left;transition:.35s}
.service-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-lg);border-color:transparent}
.service-card:hover::before{transform:scaleX(1)}
.service-card.lg{padding:44px 40px}
.service-icon{width:64px;height:64px;border-radius:16px;background:linear-gradient(135deg,rgba(26,86,219,.12),rgba(6,182,212,.12));display:flex;align-items:center;justify-content:center;color:var(--primary);margin-bottom:22px;transition:.3s}
.service-icon svg{width:32px;height:32px}
.service-card:hover .service-icon{background:var(--grad);color:#fff}
.service-card h3{font-size:21px;color:var(--dark);margin-bottom:6px}
.service-sub{font-size:13px;color:var(--primary);font-weight:600;margin-bottom:12px}
.service-summary{color:var(--text-light);font-size:14.5px;margin-bottom:18px}
.service-more{font-size:14px;font-weight:600;color:var(--primary)}

/* ===== 特色 ===== */
.feature-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:26px}
.feature-item{background:#fff;border-radius:var(--radius);padding:34px 28px;box-shadow:var(--shadow);transition:.3s}
.feature-item:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.feature-no{font-size:34px;font-weight:800;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;margin-bottom:12px}
.feature-item h4{font-size:19px;color:var(--dark);margin-bottom:10px}
.feature-item p{color:var(--text-light);font-size:14.5px}

/* ===== 案例 ===== */
.case-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:26px}
.case-card{background:#fff;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:.3s;display:block}
.case-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-lg)}
.case-cover{height:180px;background:var(--grad) center/cover no-repeat;position:relative;display:flex;align-items:flex-end}
.case-cat{position:absolute;top:14px;left:14px;padding:5px 14px;border-radius:20px;background:rgba(11,21,38,.6);color:#fff;font-size:12px;backdrop-filter:blur(4px)}
.case-body{padding:24px}
.case-body h3{font-size:18px;color:var(--dark);margin-bottom:10px;display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden}
.case-body p{color:var(--text-light);font-size:14px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.case-client{display:block;margin-top:12px;font-size:13px;color:var(--primary)}

/* ===== 新闻 ===== */
.news-list{display:flex;flex-direction:column;gap:16px}
.news-row{display:flex;align-items:center;gap:26px;background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:24px 28px;transition:.3s}
.news-row:hover{transform:translateX(6px);box-shadow:var(--shadow);border-color:transparent}
.news-date{flex-shrink:0;width:70px;text-align:center;border-right:1px solid var(--border);padding-right:20px}
.news-date b{display:block;font-size:32px;font-weight:800;color:var(--primary);line-height:1}
.news-date span{font-size:13px;color:var(--text-light)}
.news-main{flex:1;min-width:0}
.news-cat{display:inline-block;font-size:12px;color:var(--primary);background:rgba(26,86,219,.08);padding:3px 12px;border-radius:20px;margin-bottom:8px}
.news-main h3{font-size:19px;color:var(--dark);margin-bottom:6px;display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden}
.news-main p{color:var(--text-light);font-size:14px;display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden}
.news-arrow{font-size:22px;color:var(--text-light);transition:.3s}
.news-row:hover .news-arrow{color:var(--primary);transform:translateX(4px)}

/* ===== CTA ===== */
.cta{background:var(--dark);position:relative;overflow:hidden}
.cta::before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 80% 50%,rgba(26,86,219,.5),transparent 55%)}
.cta-inner{position:relative;z-index:2;display:flex;align-items:center;justify-content:space-between;gap:30px;padding:70px 0;flex-wrap:wrap}
.cta-inner h2{color:#fff;font-size:32px;font-weight:800}
.cta-inner p{color:rgba(255,255,255,.7);margin-top:10px;font-size:16px}

/* ===== 页面横幅 ===== */
.page-banner{position:relative;padding:150px 0 60px;background:var(--dark);overflow:hidden;text-align:center}
.page-banner-bg{position:absolute;inset:0;background:
  radial-gradient(circle at 25% 30%,rgba(26,86,219,.5),transparent 50%),
  radial-gradient(circle at 75% 40%,rgba(6,182,212,.35),transparent 50%),
  linear-gradient(160deg,#0b1526,#0f2440)}
.page-banner .container{position:relative;z-index:2}
.page-banner h1{color:#fff;font-size:40px;font-weight:800}
.page-banner p{color:rgba(255,255,255,.7);margin-top:12px;font-size:16px}
.breadcrumb{margin-top:18px;font-size:14px;color:rgba(255,255,255,.55)}
.breadcrumb a{color:rgba(255,255,255,.75)}
.breadcrumb a:hover{color:#fff}
.breadcrumb span{margin:0 8px}

/* ===== 详情页 ===== */
.detail-layout{display:grid;grid-template-columns:1fr 320px;gap:40px;align-items:start}
.detail-main{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:44px}
.detail-icon-head{display:flex;gap:20px;align-items:center;margin-bottom:26px;padding-bottom:26px;border-bottom:1px solid var(--border)}
.detail-icon-head h2{font-size:26px;color:var(--dark)}
.detail-icon-head p{color:var(--primary);font-size:14px}
.detail-cover{height:340px;border-radius:12px;background:var(--grad) center/cover no-repeat;margin-bottom:26px}
.detail-meta{display:flex;gap:20px;flex-wrap:wrap;color:var(--text-light);font-size:14px;margin-bottom:24px;padding-bottom:20px;border-bottom:1px dashed var(--border)}
.news-title{font-size:30px;color:var(--dark);margin-bottom:18px;line-height:1.35}
.rich-text{color:#374151;font-size:16px;line-height:1.9}
.rich-text p{margin-bottom:16px}
.detail-cta{margin-top:34px;padding-top:26px;border-top:1px solid var(--border);display:flex;gap:14px;flex-wrap:wrap}
.detail-side{display:flex;flex-direction:column;gap:24px;position:sticky;top:100px}
.side-box{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:26px}
.side-box h4{font-size:17px;color:var(--dark);margin-bottom:18px;padding-bottom:14px;border-bottom:2px solid var(--primary);display:inline-block}
.side-links li{list-style:none;margin-bottom:12px}
.side-links a{color:var(--text);font-size:14.5px;transition:.2s;display:block;padding:6px 0}
.side-links a:hover{color:var(--primary);padding-left:6px}
.side-contact{background:var(--grad);color:#fff;text-align:center}
.side-contact h4{color:#fff;border-color:rgba(255,255,255,.5)}
.side-contact p{opacity:.85;font-size:14px}
.side-contact strong{display:block;font-size:24px;margin:8px 0 18px}
.side-contact .btn-outline{border-color:#fff;color:#fff}
.side-contact .btn-outline:hover{background:#fff;color:var(--primary)}

/* ===== 筛选 ===== */
.filter-bar{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin-bottom:44px}
.filter-bar a{padding:9px 24px;border-radius:30px;border:1px solid var(--border);color:var(--text);font-size:14px;transition:.25s}
.filter-bar a:hover,.filter-bar a.active{background:var(--grad);color:#fff;border-color:transparent}

/* ===== 关于 ===== */
.about-intro{display:grid;grid-template-columns:1.3fr 1fr;gap:56px;align-items:center}
.about-text h2{font-size:34px;color:var(--dark);margin-bottom:20px}
.about-tags{display:flex;gap:12px;flex-wrap:wrap;margin-top:24px}
.about-tags span{padding:8px 20px;background:var(--bg-alt);border-radius:30px;font-size:14px;color:var(--primary);font-weight:600}
.about-stats{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.astat{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:30px;text-align:center;box-shadow:var(--shadow)}
.astat b{display:block;font-size:38px;font-weight:800;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.astat span{color:var(--text-light);font-size:14px}

/* ===== 联系 ===== */
.contact-layout{display:grid;grid-template-columns:1fr 1.2fr;gap:50px;align-items:start}
.contact-info h2{font-size:32px;color:var(--dark);margin-bottom:16px}
.contact-lead{color:var(--text-light);margin-bottom:30px}
.contact-list li{list-style:none;display:flex;gap:16px;align-items:center;margin-bottom:22px}
.contact-list .ci{width:48px;height:48px;border-radius:12px;background:var(--bg-alt);display:flex;align-items:center;justify-content:center;font-size:20px;flex-shrink:0}
.contact-list em{display:block;font-style:normal;font-size:13px;color:var(--text-light)}
.contact-list b{font-size:17px;color:var(--dark)}
.wechat-qr-box{margin-top:28px;display:inline-flex;flex-direction:column;align-items:center;gap:12px;padding:18px;background:#fff;border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow)}
.wechat-qr-box img{width:180px;height:180px;object-fit:contain;border-radius:8px}
.wechat-qr-box span{font-size:13px;color:var(--text-light)}
.contact-form-box{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:40px;box-shadow:var(--shadow)}
.contact-form-box h3{font-size:22px;color:var(--dark);margin-bottom:24px}
.cform .frow{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.field{margin-bottom:18px;display:flex;flex-direction:column}
.field label{font-size:14px;color:var(--text);margin-bottom:8px;font-weight:500}
.field input,.field textarea,.field select{padding:12px 15px;border:1px solid var(--border);border-radius:10px;font-size:15px;font-family:inherit;transition:.2s;background:#fbfcfe}
.field input:focus,.field textarea:focus,.field select:focus{outline:none;border-color:var(--primary);background:#fff;box-shadow:0 0 0 3px rgba(26,86,219,.1)}

/* ===== 提示 ===== */
.alert{padding:13px 18px;border-radius:10px;margin-bottom:20px;font-size:14.5px}
.alert-success{background:#e7f7ee;color:#0f7b46;border:1px solid #b7e6cd}
.alert-error{background:#fdeaea;color:#c0392b;border:1px solid #f5c6c6}
.empty{text-align:center;padding:60px;color:var(--text-light)}

/* ===== 页脚 ===== */
.site-footer{background:var(--dark-2);color:rgba(255,255,255,.65);padding-top:70px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:50px}
.footer-logo{font-size:22px;font-weight:800;color:#fff;margin-bottom:16px}
.footer-about p{font-size:14px;line-height:1.8}
.footer-col h4{color:#fff;font-size:16px;margin-bottom:18px}
.footer-col ul li{list-style:none;margin-bottom:11px}
.footer-col ul a{font-size:14px;transition:.2s}
.footer-col ul a:hover{color:#fff;padding-left:4px}
.footer-contact li{font-size:14px;margin-bottom:11px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.08);padding:22px 0}
.footer-bottom .container{display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;font-size:13px;color:rgba(255,255,255,.45)}
.footer-bottom .icp-link{color:rgba(255,255,255,.45);transition:color .2s}
.footer-bottom .icp-link:hover{color:rgba(255,255,255,.8)}
.footer-stats{color:rgba(255,255,255,.4);font-size:12.5px}
.footer-stats b{color:#8ecbff;font-weight:600;margin:0 1px}

/* ===== 回到顶部 ===== */
.back-top{position:fixed;right:26px;bottom:26px;width:46px;height:46px;border-radius:12px;background:var(--grad);color:#fff;display:flex;align-items:center;justify-content:center;font-size:20px;box-shadow:var(--shadow-lg);opacity:0;visibility:hidden;transform:translateY(10px);transition:.3s;z-index:900}
.back-top.show{opacity:1;visibility:visible;transform:translateY(0)}

/* ===== 404 ===== */
.notfound{text-align:center;padding:160px 0}
.notfound h1{font-size:110px;font-weight:800;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.notfound p{color:var(--text-light);font-size:18px;margin:10px 0 30px}

/* ===== 滚动动画 ===== */
.reveal{opacity:0;transform:translateY(30px);transition:.7s cubic-bezier(.2,.8,.2,1)}
.reveal.in{opacity:1;transform:none}

/* ===== 响应式 ===== */
@media(max-width:992px){
  .service-grid,.feature-grid,.case-grid{grid-template-columns:repeat(2,1fr)}
  .hero-text h1{font-size:42px}
  .detail-layout{grid-template-columns:1fr}
  .detail-side{position:static}
  .about-intro,.contact-layout{grid-template-columns:1fr;gap:36px}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:768px){
  .main-nav{position:fixed;top:0;right:-100%;width:76%;max-width:320px;height:100vh;background:#fff;flex-direction:column;padding:90px 24px 24px;gap:6px;box-shadow:-10px 0 40px rgba(0,0,0,.15);transition:.35s;z-index:1001}
  .main-nav.open{right:0}
  .main-nav a{color:var(--text);padding:14px 16px;border-radius:10px;font-size:16px}
  .main-nav a:hover,.main-nav a.active{background:rgba(26,86,219,.08);color:var(--primary)}
  .nav-toggle{display:flex;z-index:1002}
  .btn-nav-contact{display:none}
  .nav-toggle.active span:nth-child(1){transform:translateY(7.5px) rotate(45deg);background:var(--dark)}
  .nav-toggle.active span:nth-child(2){opacity:0}
  .nav-toggle.active span:nth-child(3){transform:translateY(-7.5px) rotate(-45deg);background:var(--dark)}
  .hero{padding-top:130px}
  .hero-text h1{font-size:33px}
  .hero-text p{font-size:16px}
  .stat-bar{grid-template-columns:1fr 1fr;gap:16px;padding:26px 16px}
  .stat-item+.stat-item::before{display:none}
  .stat-item b{font-size:32px}
  .section{padding:64px 0}
  .section-head h2{font-size:28px}
  .service-grid,.feature-grid,.case-grid,.service-detail-grid{grid-template-columns:1fr}
  .cta-inner{flex-direction:column;text-align:center;padding:50px 0}
  .cta-inner h2{font-size:26px}
  .cform .frow{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .news-row{gap:16px;padding:18px}
  .news-date{width:56px;padding-right:14px}
  .detail-main{padding:26px}
  .page-banner h1{font-size:30px}
  .about-stats{grid-template-columns:1fr 1fr}
  .body-lock{overflow:hidden}
}
@media(max-width:420px){
  .stat-bar{grid-template-columns:1fr 1fr}
  .about-stats{grid-template-columns:1fr}
}

/* ===== 前台分页 ===== */
.site-pager{display:flex;align-items:center;justify-content:center;gap:8px;flex-wrap:wrap;margin-top:44px}
.site-pager .sp-btn,.site-pager .sp-num{min-width:42px;height:42px;padding:0 16px;display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--border);border-radius:10px;color:var(--text);background:#fff;font-size:15px;transition:.2s}
.site-pager .sp-btn:hover,.site-pager .sp-num:hover{border-color:var(--primary);color:var(--primary)}
.site-pager .sp-num.on{background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;border-color:transparent}
.site-pager .sp-dots{color:var(--text-light)}