/* 深启云官网 · 纯静态样式 */
:root{
  --blue:#0052D9; --blue-dark:#0F2F7A; --ink:#252B3A; --text:#4B5A70; --muted:#6B7385; --faint:#8A94A6;
  --line:#E5E8EF; --line2:#DDE1E9; --bg:#F5F6F8; --bg2:#F3F6FB; --bg3:#EEF0F4; --footer:#1C2333;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC","Helvetica Neue",Arial,sans-serif;font-size:14px;line-height:1.7;color:var(--ink);background:#fff}
a{color:inherit;text-decoration:none}
a:hover{color:var(--blue)}
img{display:block;max-width:100%}
h1,h2,h3,p{margin:0}
.container{max-width:1200px;margin:0 auto;padding:0 20px}
.btn{display:inline-flex;align-items:center;justify-content:center;height:46px;padding:0 30px;border-radius:2px;font-size:15px;white-space:nowrap}
.btn-primary{background:var(--blue);color:#fff}
.btn-primary:hover{background:#0043b3;color:#fff}
.btn-ghost{border:1px solid #B9C6E0;color:var(--ink);background:#fff}
.btn-sm{height:36px;padding:0 20px;font-size:14px}
.more{font-size:14px;color:var(--blue)}
.section{padding:88px 0 96px}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:40px}
.section-head h2{font-size:32px;font-weight:700;line-height:1.3}
.section-head p{margin-top:8px;font-size:15px;color:var(--muted)}
.tag{font-size:12px;color:var(--blue)}

/* 顶部工具条 */
.topbar{background:var(--bg);color:var(--muted);font-size:12px}
.topbar .container{display:flex;align-items:center;justify-content:space-between;height:36px}
.topbar .links{display:flex;gap:28px}
.topbar b{font-weight:500;color:var(--ink)}

/* 导航 */
.nav{position:sticky;top:0;z-index:50;background:#fff;border-bottom:1px solid var(--line)}
.nav .container{display:flex;align-items:center;justify-content:space-between;height:72px}
.brand{display:flex;align-items:center;gap:10px;font-size:22px;font-weight:700;letter-spacing:.1em}
.brand svg{width:32px;height:32px}
.logo{height:40px;width:auto;display:block}
.logo-foot{height:40px;width:auto;display:block;margin-bottom:14px}
.menu{display:flex;align-items:center;gap:34px;font-size:15px;list-style:none;margin:0 0 0 48px;padding:0}
.nav-right{display:flex;align-items:center;gap:20px;margin-left:auto}
.nav-toggle{display:none}
.nav-burger{display:none;width:44px;height:44px;align-items:center;justify-content:center;cursor:pointer}
.nav-burger span{display:block;width:22px;height:2px;background:var(--ink);box-shadow:0 -7px 0 var(--ink),0 7px 0 var(--ink)}

/* 首屏 */
.hero{position:relative;background:var(--bg2);overflow:hidden;
  background-image:linear-gradient(rgba(0,82,217,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(0,82,217,.06) 1px,transparent 1px);background-size:80px 80px}
.hero::before{content:"";position:absolute;left:0;top:0;bottom:0;width:6px;background:var(--blue)}
.hero .container{display:flex;align-items:center;justify-content:space-between;gap:40px;min-height:560px;padding-top:40px;padding-bottom:100px}
.hero-text{max-width:600px}
.hero-text .eyebrow{font-size:14px;color:var(--muted);letter-spacing:.2em;margin-bottom:22px}
.hero-text h1{font-size:50px;font-weight:700;line-height:1.3;margin-bottom:22px}
.hero-text p{font-size:17px;line-height:1.8;color:var(--text);max-width:520px;margin-bottom:28px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.hero-visual{position:relative;width:620px;height:460px;flex-shrink:0}
.hero-visual .web{position:absolute;right:0;top:40px;width:540px;height:300px;object-fit:cover;object-position:top;border:1px solid #DCE5F5;box-shadow:0 24px 48px rgba(15,20,32,.16);background:#fff}
.hero-visual .phone{position:absolute;left:0;top:110px;width:170px;height:320px;object-fit:cover;object-position:top;border:6px solid #fff;box-shadow:0 20px 40px rgba(15,20,32,.22);background:#fff}
.hero-visual .badge{position:absolute;right:24px;bottom:60px;padding:10px 14px;background:#fff;border-left:3px solid var(--blue);box-shadow:0 8px 20px rgba(15,20,32,.12)}
.hero-visual .badge small{display:block;font-size:11px;color:var(--muted)}
.hero-visual .badge b{font-size:15px}

/* 热门服务条 */
.hot{position:relative;margin-top:-60px}
.hot .grid{display:grid;grid-template-columns:repeat(4,1fr);background:#fff;border:1px solid var(--line);box-shadow:0 8px 24px rgba(15,20,32,.08)}
.hot a{display:flex;flex-direction:column;gap:6px;padding:24px 28px;border-right:1px solid var(--line)}
.hot a:last-child{border-right:0}
.hot a small{font-size:12px;color:var(--muted)}
.hot a small.hl{color:var(--blue)}
.hot a b{font-size:17px}
.hot a span{font-size:13px;color:var(--muted)}

/* 产品与服务 */
.services-box{display:flex;border:1px solid var(--line)}
.services-tabs{display:flex;flex-direction:column;width:260px;flex-shrink:0;background:var(--bg);border-right:1px solid var(--line)}
.services-tabs a{display:flex;align-items:center;justify-content:space-between;padding:22px 28px;border-left:3px solid transparent;font-size:16px}
.services-tabs a.active{background:#fff;border-left-color:var(--blue);font-weight:700}
.services-tabs a.active i{color:var(--blue);font-style:normal}
.services-grid{display:grid;grid-template-columns:1fr 1fr;flex:1}
.services-grid a{display:flex;flex-direction:column;gap:8px;padding:32px;border-right:1px solid var(--line);border-bottom:1px solid var(--line)}
.services-grid a:nth-child(2n){border-right:0}
.services-grid a:nth-last-child(-n+2){border-bottom:0}
.services-grid b{font-size:17px}
.services-grid p{font-size:14px;color:var(--muted);line-height:1.8}
.services-grid .more{padding-top:6px;font-size:13px}

/* 解决方案 */
.solutions{background:var(--bg)}
.sol-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.sol-grid a{display:flex;flex-direction:column;justify-content:flex-end;gap:10px;min-height:200px;padding:28px;background:#fff;border:1px solid var(--line)}
.sol-grid a.dark{min-height:240px;background:var(--blue-dark);color:#fff;border:0;border-top:3px solid var(--blue);
  background-image:repeating-linear-gradient(135deg,rgba(255,255,255,.03) 0 2px,transparent 2px 14px)}
.sol-grid a.dark:hover{color:#fff}
.sol-grid small{font-size:12px;letter-spacing:.1em;color:var(--muted)}
.sol-grid a.dark small{color:#A6ADBA}
.sol-grid b{font-size:20px}
.sol-grid a.dark b{font-size:22px}
.sol-grid span{font-size:13px;color:var(--muted);line-height:1.7}
.sol-grid a.dark span{color:#C9CFDA}

/* 案例 */
.cases-top{display:grid;grid-template-columns:1.4fr 1fr;gap:20px;margin-bottom:20px}
.case-main{border:1px solid var(--line)}
.case-main .shot{position:relative;height:340px;background:var(--bg);overflow:hidden}
.case-main .shot .web{width:100%;height:100%;object-fit:cover;object-position:top}
.case-main .shot .phone{position:absolute;right:28px;bottom:-40px;width:150px;height:316px;object-fit:cover;object-position:top;border:5px solid #fff;box-shadow:0 16px 32px rgba(15,20,32,.25);background:#fff}
.case-main .body{padding:28px 32px}
.case-main .body b{display:block;font-size:22px;margin:10px 0}
.case-main .body p{font-size:14px;color:var(--muted);line-height:1.8}
.chips{display:flex;flex-wrap:wrap;gap:8px;font-size:12px}
.chips span{padding:2px 8px;border:1px solid var(--line2);color:var(--muted)}
.chips span.hl{border-color:var(--blue);color:var(--blue)}
.cases-side{display:flex;flex-direction:column;gap:20px}
.case-row{display:flex;gap:20px;flex:1;border:1px solid var(--line);background:#fff;overflow:hidden}
.case-row .shot{width:180px;flex-shrink:0;background:var(--bg);overflow:hidden}
.case-row .shot img{width:100%;height:100%;object-fit:cover;object-position:top}
.case-row .body{display:flex;flex-direction:column;justify-content:center;gap:8px;padding:22px 20px 22px 0}
.case-row b{font-size:18px}
.case-row p{font-size:13px;color:var(--muted)}
.cases-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.cases-grid a{display:flex;flex-direction:column;border:1px solid var(--line);background:#fff;overflow:hidden}
.cases-grid .shot{height:180px;background:var(--bg);overflow:hidden;display:flex;align-items:center;justify-content:center;color:var(--faint);font-size:13px;letter-spacing:.1em}
.cases-grid .shot img{width:100%;height:100%;object-fit:cover;object-position:top}
.cases-grid .shot.dark{background:#0F1420}
.cases-grid .shot.dark img{width:auto}
.cases-grid .body{display:flex;flex-direction:column;gap:6px;padding:20px 22px}
.cases-grid b{font-size:17px}
.cases-grid p{font-size:13px;color:var(--muted)}

/* 服务保障 */
.why{background:var(--bg)}
.why-grid{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--line2);border-left:1px solid var(--line2);margin-bottom:32px}
.why-grid div{display:flex;flex-direction:column;gap:14px;padding:36px 28px;background:#fff;border-right:1px solid var(--line2);border-bottom:1px solid var(--line2)}
.why-grid small{font-size:13px;color:var(--blue)}
.why-grid b{font-size:18px}
.why-grid span{font-size:13px;color:var(--muted);line-height:1.8}
.stack{display:flex;flex-wrap:wrap;gap:8px;font-size:13px;margin-bottom:40px}
.stack span{padding:6px 12px;background:#fff;border:1px solid var(--line2)}
.steps{display:grid;grid-template-columns:repeat(6,1fr);gap:16px}
.steps div{display:flex;flex-direction:column;gap:6px}
.steps small{font-size:13px;color:var(--blue)}
.steps b{font-size:15px}
.steps span{font-size:12px;color:var(--muted)}

/* 资质 + 客户 */
.trust{border-bottom:1px solid var(--line)}
.trust .container{display:flex;gap:60px}
.trust h2{font-size:26px;font-weight:700;margin-bottom:24px}
.certs{width:440px;flex-shrink:0}
.certs .grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.certs .grid div{display:flex;align-items:center;justify-content:center;height:150px;border:1px solid var(--line);background:var(--bg);color:var(--faint);font-size:12px;text-align:center;padding:8px}
.clients{flex:1}
.clients .grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
.clients .grid div{display:flex;align-items:center;justify-content:center;height:69px;border:1px solid var(--line);color:var(--faint);font-size:12px}

/* 新闻 */
.news-grid{display:grid;grid-template-columns:1fr 1.3fr;gap:40px}
.news-lead{border:1px solid var(--line)}
.news-lead .shot{display:flex;align-items:center;justify-content:center;height:260px;background:var(--bg3);color:var(--faint);font-size:13px}
.news-lead .body{padding:24px}
.news-lead time,.news-list time{font-size:12px;color:var(--faint)}
.news-lead b{display:block;font-size:18px;line-height:1.5;margin:8px 0}
.news-lead p,.news-list p{font-size:13px;color:var(--muted)}
.news-list a{display:flex;gap:24px;padding:20px 0;border-bottom:1px solid var(--line)}
.news-list .date{display:flex;flex-direction:column;align-items:center;width:64px;flex-shrink:0;line-height:1.2}
.news-list .date b{font-size:26px}
.news-list b{font-size:16px}

/* 咨询横幅 */
.cta{background:var(--bg);border-top:1px solid var(--line);padding:48px 0}
.cta .container{display:flex;align-items:center;justify-content:space-between;gap:24px}
.cta h2{font-size:26px;font-weight:700;line-height:1.3}
.cta p{font-size:14px;color:var(--muted);margin-top:6px}
.cta .right{display:flex;align-items:center;gap:24px}
.cta .phone{text-align:right;line-height:1.3}
.cta .phone small{display:block;font-size:12px;color:var(--faint)}
.cta .phone b{font-size:24px}

/* 页脚 */
footer{background:var(--footer);color:#A6ADBA}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr 1fr;gap:40px;padding:56px 0 40px}
.foot-grid .brand{color:#fff;font-size:17px;letter-spacing:0;margin-bottom:14px}
.foot-grid p{font-size:13px;line-height:1.8;margin-bottom:14px}
.foot-grid ul{list-style:none;margin:0;padding:0;font-size:13px;display:flex;flex-direction:column;gap:10px}
.foot-grid h4{margin:0 0 14px;font-size:15px;color:#fff}
.foot-grid a:hover{color:#fff}
.qr{display:flex;flex-direction:column;align-items:center;gap:8px;font-size:12px}
.qr div{display:flex;align-items:center;justify-content:center;width:110px;height:110px;background:#fff;color:var(--muted);text-align:center}
.foot-bottom{border-top:1px solid #2A3244;font-size:12px}
.foot-bottom .container{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:8px;height:auto;padding-top:18px;padding-bottom:18px}

/* 响应式 */
@media (max-width:1024px){
  .hero .container{flex-direction:column;align-items:flex-start;padding-bottom:110px}
  .hero-visual{width:100%;max-width:620px;height:auto;aspect-ratio:620/460}
  .hero-visual .web{width:87%;height:65%;top:8%}
  .hero-visual .phone{width:27%;height:70%;top:22%}
  .hero-visual .badge{bottom:8%}
  .hot .grid{grid-template-columns:repeat(2,1fr)}
  .hot a:nth-child(2n){border-right:0}
  .hot a:nth-child(-n+2){border-bottom:1px solid var(--line)}
  .services-box{flex-direction:column}
  .services-tabs{width:100%;flex-direction:row;overflow-x:auto;border-right:0;border-bottom:1px solid var(--line)}
  .services-tabs a{padding:16px 20px;border-left:0;border-bottom:3px solid transparent;white-space:nowrap}
  .services-tabs a.active{border-bottom-color:var(--blue)}
  .sol-grid,.cases-grid{grid-template-columns:repeat(2,1fr)}
  .cases-top{grid-template-columns:1fr}
  .why-grid{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:repeat(3,1fr)}
  .trust .container{flex-direction:column;gap:40px}
  .certs{width:100%}
  .news-grid{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr 1fr 1fr}
}
@media (max-width:768px){
  .topbar{display:none}
  .menu{display:none}
  .nav-right .btn{display:none}
  .nav-burger{display:flex}
  .nav-toggle:checked ~ .menu{display:flex;position:absolute;left:0;right:0;top:72px;flex-direction:column;align-items:stretch;gap:0;margin:0;background:#fff;border-bottom:1px solid var(--line)}
  .nav-toggle:checked ~ .menu li a{display:block;padding:14px 20px;border-top:1px solid var(--line)}
  .section{padding:56px 0 64px}
  .section-head{flex-direction:column;align-items:flex-start;margin-bottom:28px}
  .section-head h2{font-size:26px}
  .hero .container{min-height:0;padding-top:48px;padding-bottom:90px}
  .hero-text h1{font-size:32px}
  .hero-text p{font-size:15px}
  .hot .grid{grid-template-columns:1fr}
  .hot a{border-right:0;border-bottom:1px solid var(--line)}
  .services-grid{grid-template-columns:1fr}
  .services-grid a{border-right:0}
  .services-grid a:nth-last-child(-n+2){border-bottom:1px solid var(--line)}
  .services-grid a:last-child{border-bottom:0}
  .sol-grid,.cases-grid,.why-grid{grid-template-columns:1fr}
  .case-main .shot{height:220px}
  .case-main .shot .phone{width:100px;height:210px;right:16px;bottom:-30px}
  .case-row{flex-direction:column;gap:0}
  .case-row .shot{width:100%;height:200px}
  .case-row .body{padding:20px}
  .steps{grid-template-columns:repeat(2,1fr)}
  .certs .grid,.clients .grid{grid-template-columns:repeat(2,1fr)}
  .cta .container{flex-direction:column;align-items:flex-start}
  .cta .phone{text-align:left}
  .foot-grid{grid-template-columns:1fr 1fr;gap:28px}
  .foot-grid > div:first-child{grid-column:span 2}
}

/* ===== 内页 ===== */
.menu a.active{color:var(--blue);border-bottom:2px solid var(--blue);padding:4px 0}
.page-hero{background:var(--bg2);border-bottom:1px solid var(--line);position:relative;
  background-image:linear-gradient(rgba(0,82,217,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(0,82,217,.06) 1px,transparent 1px);background-size:80px 80px}
.page-hero::before{content:"";position:absolute;left:0;top:0;bottom:0;width:6px;background:var(--blue)}
.page-hero .container{padding-top:64px;padding-bottom:64px}
.page-hero h1{font-size:40px;font-weight:700;line-height:1.3}
.page-hero p{margin-top:10px;font-size:16px;color:var(--text)}
/* 服务页 */
.svc{padding:56px 0;border-bottom:1px solid var(--line)}
.svc .container{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:start}
.svc h2{font-size:28px;font-weight:700;margin:6px 0 12px}
.svc p{font-size:15px;color:var(--text);line-height:1.8}
.svc-list{list-style:none;margin:0;padding:0;display:grid;gap:12px}
.svc-list li{padding:14px 18px;background:var(--bg);border-left:3px solid var(--blue);font-size:14px}
/* 方案页 */
.sol{padding:56px 0;border-bottom:1px solid var(--line)}
.sol:nth-child(even){background:var(--bg)}
.sol-row{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center}
.sol:nth-child(even) .sol-row .sol-text{order:2}
.sol-text h2{font-size:28px;font-weight:700;margin:6px 0 12px}
.sol-text p{font-size:15px;color:var(--text);line-height:1.8;margin-bottom:16px}
.sol-img{height:320px;overflow:hidden;border:1px solid var(--line);background:#fff;display:flex;justify-content:center}
.sol-img img{width:100%;height:100%;object-fit:cover;object-position:top}
/* 案例页 */
.case{padding:64px 0;border-bottom:1px solid var(--line)}
.case:nth-child(even){background:var(--bg)}
.case-row2{display:grid;grid-template-columns:1.1fr 1fr;gap:60px;align-items:start}
.case-row2 .shot{position:relative;height:400px;background:var(--bg3);border:1px solid var(--line);overflow:hidden;display:flex;align-items:center;justify-content:center;color:var(--faint);letter-spacing:.1em}
.case-row2 .shot img{width:100%;height:100%;object-fit:cover;object-position:top}
.case-row2 .shot.dark{background:#0F1420}
.case-row2 .shot.dark img{width:auto}
.case-row2 .shot .phone{position:absolute;right:24px;bottom:-40px;width:150px;height:316px;border:5px solid #fff;box-shadow:0 16px 32px rgba(15,20,32,.25);background:#fff}
.case-row2 h2{font-size:28px;font-weight:700;margin:12px 0 4px}
.case-row2 .client{font-size:13px;color:var(--faint);margin-bottom:12px}
.case-row2 p{font-size:15px;color:var(--text);line-height:1.8}
.case-row2 h3{font-size:16px;margin:20px 0 10px}
.case-row2 ul{margin:0;padding:0 0 0 18px;font-size:14px;color:var(--text);line-height:1.9}
.stack-line{margin-top:16px;font-size:13px;color:var(--muted)}
.stack-line b{color:var(--ink);margin-right:8px}
/* 关于页 */
.about-grid{display:grid;grid-template-columns:1.4fr 1fr;gap:60px;align-items:start}
.about-grid h2{font-size:30px;font-weight:700;margin:6px 0 16px}
.about-grid p{font-size:15px;color:var(--text);line-height:1.9;margin-bottom:14px}
.facts{margin:0;display:grid;gap:0;border-top:1px solid var(--line2)}
.facts div{display:flex;gap:16px;padding:14px 0;border-bottom:1px solid var(--line2);font-size:14px}
.facts dt{width:90px;flex-shrink:0;color:var(--muted)}
.facts dd{margin:0;font-weight:500}
.tech-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.tech-grid div{display:flex;flex-direction:column;gap:8px;padding:24px;border:1px solid var(--line);border-top:3px solid var(--blue)}
.tech-grid b{font-size:16px}
.tech-grid span{font-size:14px;color:var(--muted);line-height:1.8}
/* 新闻页 */
.news-page a{border-bottom:1px solid var(--line)}
/* 联系页 */
.contact-grid{display:grid;grid-template-columns:1fr 1.2fr;gap:60px;align-items:start}
.contact-grid h2{font-size:26px;font-weight:700;margin-bottom:20px}
.contact-form p{font-size:14px;color:var(--muted);margin-bottom:20px}
.contact-form form{display:grid;gap:16px}
.contact-form label{display:flex;flex-direction:column;gap:6px;font-size:13px;color:var(--muted)}
.contact-form input,.contact-form textarea{font:inherit;font-size:14px;color:var(--ink);padding:10px 12px;border:1px solid var(--line2);border-radius:2px;background:#fff}
.contact-form input:focus,.contact-form textarea:focus{outline:2px solid var(--blue);outline-offset:-1px}
.contact-form button{border:0;cursor:pointer;justify-self:start}
@media (max-width:1024px){.tech-grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:768px){
  .page-hero h1{font-size:28px}
  .svc .container,.sol-row,.case-row2,.about-grid,.contact-grid{grid-template-columns:1fr;gap:28px}
  .sol:nth-child(even) .sol-row .sol-text{order:0}
  .sol-img{height:220px}
  .case-row2 .shot{height:240px}
  .case-row2 .shot .phone{width:100px;height:210px;right:12px;bottom:-30px}
  .tech-grid{grid-template-columns:1fr}
}