:root{
  --bg:#1b2328; --bg2:#202a30; --card:#242e35; --card2:#2a363e;
  --line:rgba(255,255,255,.10);
  --txt:#eaf1ed; --muted:#9aa8a3;
  --acc:#3aa6a0; --acc2:#2a8580;
  --serif:"Noto Serif SC","Songti SC","SimSun",serif;
  --sans:"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--sans);font-size:17px;background:var(--bg);color:var(--txt);line-height:1.85;overflow-x:hidden}
img{max-width:100%;display:block}
a{text-decoration:none;color:inherit}
.container{width:min(1160px,92%);margin:0 auto}
section{padding:88px 0;position:relative}
header{position:fixed;top:0;left:0;right:0;z-index:99;transition:.35s;padding:16px 0}
header.solid{background:rgba(27,35,40,.92);backdrop-filter:blur(12px);padding:10px 0;box-shadow:0 4px 24px rgba(0,0,0,.35)}
.hd{display:flex;align-items:center;justify-content:space-between;gap:20px}
.brand{display:flex;align-items:center;gap:12px}
.brand img{height:46px;width:auto}
.brand .name{font-size:24px;font-weight:700;letter-spacing:2px}
.brand .name small{display:block;font-size:13px;font-weight:400;color:var(--muted);letter-spacing:1px}
nav{display:flex;align-items:center;gap:28px}
nav a{font-size:17px;color:var(--txt);opacity:.85;transition:.25s;position:relative}
nav a:hover{opacity:1;color:var(--acc)}
nav a::after{content:"";position:absolute;left:0;bottom:-6px;width:0;height:2px;background:var(--acc);transition:.3s}
nav a:hover::after{width:100%}
.hd .tel{display:flex;align-items:center;gap:8px;background:linear-gradient(135deg,var(--acc),var(--acc2));color:#fff;font-weight:700;font-size:17px;padding:10px 18px;border-radius:8px;transition:.25s}
.hd .tel:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(58,166,160,.35)}
.burger{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:6px}
.burger span{width:24px;height:2px;background:var(--txt);border-radius:2px;transition:.3s}
.mnav{position:fixed;top:0;right:0;bottom:0;width:min(78vw,320px);background:var(--bg2);z-index:100;transform:translateX(100%);transition:.35s;padding:80px 28px;display:flex;flex-direction:column;gap:22px;box-shadow:-8px 0 30px rgba(0,0,0,.4)}
.mnav.open{transform:translateX(0)}
.mnav a{font-size:17px;color:var(--txt)}
.mnav .close{position:absolute;top:20px;right:20px;font-size:28px;background:none;border:0;color:var(--txt);cursor:pointer}
.overlay{position:fixed;inset:0;background:rgba(0,0,0,.5);z-index:98;opacity:0;pointer-events:none;transition:.3s}
.overlay.show{opacity:1;pointer-events:auto}
.hero{min-height:100vh;display:flex;align-items:center;position:relative;padding:140px 0 90px}
.hero .bgimg{position:absolute;inset:0;background:url("门头.jpg") center/cover no-repeat;filter:saturate(.85)}
.hero .shade{position:absolute;inset:0;background:linear-gradient(180deg,rgba(27,35,40,.72),rgba(27,35,40,.55) 45%,var(--bg) 100%)}
.hero .content{position:relative;z-index:2;max-width:820px}
.hero .kicker{display:inline-flex;align-items:center;gap:10px;border:1px solid rgba(58,166,160,.55);color:var(--acc);padding:7px 16px;border-radius:999px;font-size:15px;letter-spacing:2px;background:rgba(58,166,160,.1)}
.hero h1{font-family:var(--serif);font-size:clamp(40px,6vw,74px);line-height:1.18;margin:26px 0 18px;font-weight:700}
.hero h1 em{font-style:normal;background:linear-gradient(90deg,var(--acc),#6fd0c8);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p.sub{font-size:clamp(17px,1.8vw,20px);color:#c9d2cc;max-width:680px}
.hero .tags{display:flex;flex-wrap:wrap;gap:10px;margin:26px 0 36px}
.hero .tags span{border:1px solid var(--line);background:rgba(255,255,255,.05);padding:8px 16px;border-radius:8px;font-size:16px;color:#eaf1ed}
.hero .cta{display:flex;flex-wrap:wrap;gap:16px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:16px 34px;border-radius:10px;font-size:18px;font-weight:700;transition:.25s;border:0;cursor:pointer}
.btn.primary{background:linear-gradient(135deg,var(--acc),var(--acc2));color:#fff;box-shadow:0 10px 30px rgba(58,166,160,.32)}
.btn.primary:hover{transform:translateY(-3px);box-shadow:0 14px 36px rgba(58,166,160,.45)}
.btn.ghost{background:transparent;color:#fff;border:1px solid rgba(255,255,255,.35)}
.btn.ghost:hover{border-color:var(--acc);color:var(--acc)}
.hero .badges{display:flex;flex-wrap:wrap;gap:28px;margin-top:52px;color:var(--muted);font-size:13px}
.hero .badges b{display:block;color:var(--txt);font-size:24px;font-family:var(--serif)}
.sec-head{text-align:center;margin-bottom:54px}
.sec-head .tag{color:var(--acc);font-size:15px;letter-spacing:4px}
.sec-head h2{font-family:var(--serif);font-size:clamp(30px,3.6vw,48px);margin:12px 0 14px;font-weight:700}
.sec-head p{color:var(--muted);max-width:680px;margin:0 auto;font-size:17px}
.about{background:var(--bg2)}
.about .grid{display:grid;grid-template-columns:1.05fr 1fr;gap:56px;align-items:center}
.about .ph{border-radius:18px;overflow:hidden;position:relative;min-height:420px;background:linear-gradient(160deg,#26323a,#1b2328)}
.about .ph img{width:100%;height:100%;object-fit:cover;position:absolute;inset:0;opacity:.88}
.about .ph .lbl{position:absolute;left:20px;bottom:20px;background:rgba(27,35,40,.82);padding:10px 16px;border-radius:10px;font-size:14px;color:#eaf1ed}
.about h3{font-family:var(--serif);font-size:30px;line-height:1.5;margin-bottom:18px}
.about h3 em{font-style:normal;color:var(--acc)}
.about p{color:var(--muted);margin-bottom:16px;font-size:17px}
.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:28px}
.stats div{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:18px;text-align:center}
.stats b{font-family:var(--serif);font-size:34px;color:var(--acc)}
.stats span{display:block;font-size:15px;color:var(--muted);margin-top:6px}
.sv{display:grid;grid-template-columns:repeat(5,1fr);gap:16px}
.sv .card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:26px 18px;transition:.3s;position:relative;overflow:hidden}
.sv .card::before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--acc),var(--acc2));opacity:0;transition:.3s}
.sv .card:hover{transform:translateY(-6px);border-color:rgba(58,166,160,.5)}
.sv .card:hover::before{opacity:1}
.sv .ico{width:54px;height:54px;border-radius:12px;display:flex;align-items:center;justify-content:center;background:rgba(58,166,160,.14);color:var(--acc);margin-bottom:18px}
.sv .ico svg{width:28px;height:28px}
.sv h4{font-size:22px;margin-bottom:10px}
.sv p{color:var(--muted);font-size:16px}
.sv .lst{margin-top:14px;display:flex;flex-wrap:wrap;gap:8px}
.sv .lst span{font-size:14px;color:#dbe5e0;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.12);padding:4px 10px;border-radius:999px}
.scenes .grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.scene{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:20px 18px;display:flex;gap:14px;align-items:center;transition:.3s}
.scene:hover{transform:translateY(-4px);border-color:rgba(58,166,160,.5);background:var(--card2)}
.scene .ico{width:46px;height:46px;flex:0 0 46px;border-radius:10px;background:rgba(58,166,160,.14);color:var(--acc);display:flex;align-items:center;justify-content:center}
.scene .ico svg{width:24px;height:24px}
.scene h4{font-size:18px;margin-bottom:4px}
.scene p{font-size:14.5px;color:var(--muted)}
.scene{cursor:pointer}
.scene::after{content:"详情 →";font-size:13px;color:var(--acc);opacity:.85;flex:0 0 auto;align-self:center;margin-left:4px}
max-height:44vh}}
.strip{background:linear-gradient(120deg,#1d2a31,#161f24)}
.strip .grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;text-align:center}
.strip .it b{font-family:var(--serif);font-size:26px;color:var(--acc);display:block;margin-bottom:6px}
.strip .it span{color:#c9d2cc;font-size:16px}
.cases .grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.case{background:var(--card);border:1px solid var(--line);border-radius:16px;overflow:hidden;transition:.3s}
.case:hover{transform:translateY(-6px);border-color:rgba(58,166,160,.45)}
.case .ph{height:200px;display:flex;align-items:center;justify-content:center;position:relative;overflow:hidden}
.case .ph .em{font-size:56px;opacity:.9}
.case .ph .city{position:absolute;top:14px;left:14px;background:rgba(27,35,40,.8);color:var(--acc);font-size:13px;padding:5px 12px;border-radius:999px;border:1px solid rgba(58,166,160,.5)}
.case .bd{padding:20px}
.case .bd h4{font-size:19px;margin-bottom:8px}
.case .bd p{color:var(--muted);font-size:15.5px}
.case .bd .tg{display:flex;flex-wrap:wrap;gap:7px;margin-top:12px}
.case .bd .tg span{font-size:14px;color:#dbe5e0;background:rgba(58,166,160,.1);border:1px solid rgba(58,166,160,.35);padding:3px 10px;border-radius:999px}
.case .ph img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.case .ph .city{z-index:2}
.videos .vgrid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:18px}
.vcard{background:var(--card);border:1px solid var(--line);border-radius:16px;overflow:hidden;transition:.3s}
.vcard:hover{transform:translateY(-6px);border-color:rgba(58,166,160,.45)}
.vcard video{width:100%;display:block;aspect-ratio:9/16;background:#1b2328;object-fit:cover}
.vcard .vbd{padding:16px 18px}
.vcard .vbd h4{font-size:18px;margin-bottom:6px}
.vcard .vbd p{color:var(--muted);font-size:15px}
.demo-note{margin-top:26px;text-align:center;font-size:15px;color:var(--muted);border:1px dashed rgba(255,255,255,.22);border-radius:10px;padding:12px}
.process{background:var(--bg2)}
.steps{display:grid;grid-template-columns:repeat(5,1fr);gap:18px}
.step{text-align:center;position:relative}
.step .num{width:56px;height:56px;margin:0 auto 16px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-family:var(--serif);font-size:22px;font-weight:700;color:#fff;background:linear-gradient(135deg,var(--acc),var(--acc2))}
.step h4{font-size:18px;margin-bottom:8px}
.step p{color:var(--muted);font-size:15px}
.contact .grid{display:grid;grid-template-columns:1fr 1.1fr;gap:40px}
.cinfo{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:34px}
.cinfo h3{font-family:var(--serif);font-size:28px;margin-bottom:20px}
.cinfo .row{display:flex;gap:14px;align-items:flex-start;margin-bottom:18px}
.cinfo .row .i{width:42px;height:42px;flex:0 0 42px;border-radius:10px;background:rgba(58,166,160,.14);color:var(--acc);display:flex;align-items:center;justify-content:center}
.cinfo .row b{display:block;font-size:17px}
.cinfo .row span{color:var(--muted);font-size:16px}
.cinfo .bigtel{display:block;margin:26px 0 10px;text-align:center;background:linear-gradient(135deg,var(--acc),var(--acc2));color:#fff;font-size:30px;font-weight:800;letter-spacing:2px;padding:18px;border-radius:12px}
.cinfo .note{text-align:center;color:var(--muted);font-size:15px}
.form{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:34px}
.form h3{font-family:var(--serif);font-size:26px;margin-bottom:6px}
.form .fh{color:var(--muted);font-size:16px;margin-bottom:20px}
.form label{display:block;font-size:16px;color:#e2e9e4;margin:14px 0 6px}
.form input,.form select,.form textarea{width:100%;background:var(--bg2);border:1px solid var(--line);border-radius:10px;color:var(--txt);padding:12px 14px;font-size:17px;font-family:var(--sans);outline:none;transition:.25s}
.form input:focus,.form select:focus,.form textarea:focus{border-color:var(--acc)}
.form textarea{resize:vertical;min-height:100px}
.form .btn{width:100%;margin-top:22px}
.form .ok{display:none;margin-top:16px;text-align:center;color:#6fd0c8;background:rgba(58,166,160,.12);border:1px solid rgba(58,166,160,.45);padding:12px;border-radius:10px;font-size:16px}
.form .ok.show{display:block}
footer{background:#161d21;border-top:1px solid var(--line);padding:40px 0 28px}
.ft{display:flex;flex-wrap:wrap;gap:26px;justify-content:space-between;align-items:center}
.ft .l{display:flex;align-items:center;gap:12px}
.ft .l img{height:40px}
.ft .l b{font-size:18px}
.ft .l span{display:block;font-size:14px;color:var(--muted)}
.ft p{color:var(--muted);font-size:15px}
.reveal{opacity:0;transform:translateY(28px);transition:opacity .7s,transform .7s}
.reveal.in{opacity:1;transform:none}
@media(max-width:1200px){
  .sv{grid-template-columns:repeat(3,1fr)}
}
@media(max-width:1024px){
  .sv{grid-template-columns:repeat(2,1fr)}
  .cases .grid{grid-template-columns:repeat(2,1fr)}
  .scenes .grid{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:repeat(3,1fr);row-gap:34px}
  .strip .grid{grid-template-columns:repeat(2,1fr);row-gap:26px}
  .about .grid,.contact .grid{grid-template-columns:1fr}
}
@media(max-width:760px){
  nav{display:none}
  .hd .tel{display:none}
  .burger{display:flex}
  section{padding:64px 0}
  .sv{grid-template-columns:1fr}
  .cases .grid{grid-template-columns:1fr}
  .scenes .grid{grid-template-columns:1fr}
  .steps{grid-template-columns:repeat(2,1fr)}
  .stats{grid-template-columns:1fr}
  .hero h1{font-size:34px}
}
.sv .card[data-video]{cursor:pointer}
.sv .card[data-video]::after{content:"▶ 观看宣传片";position:absolute;top:14px;right:14px;font-size:12px;color:var(--acc);background:rgba(58,166,160,.12);border:1px solid rgba(58,166,160,.4);padding:4px 10px;border-radius:999px}
.vm{position:fixed;inset:0;z-index:200;display:none;align-items:center;justify-content:center;padding:20px}
.vm.open{display:flex}
.vm .vm-overlay{position:absolute;inset:0;background:rgba(0,0,0,.8);backdrop-filter:blur(4px)}
.vm .vm-box{position:relative;background:#000;border-radius:16px;overflow:hidden;max-width:900px;width:100%;box-shadow:0 24px 70px rgba(0,0,0,.6)}
.vm video{width:100%;display:block;max-height:78vh;background:#000}
.vm .vm-close{position:absolute;top:12px;right:14px;background:rgba(0,0,0,.6);color:#fff;border:0;width:36px;height:36px;border-radius:50%;font-size:20px;line-height:1;cursor:pointer;z-index:2}

.about .ph .phplay{position:absolute;right:16px;bottom:16px;z-index:3;width:44px;height:44px;border-radius:50%;border:0;cursor:pointer;display:flex;align-items:center;justify-content:center;background:rgba(0,0,0,.38);backdrop-filter:blur(2px);color:#fff}
.about .ph .phplay .ring{font-size:17px;line-height:1;padding-left:2px}
@media(max-width:760px){.about .ph .phplay{right:12px;bottom:12px;width:38px;height:38px}.about .ph .phplay .ring{font-size:14px}}