:root{--bg:#0b1017;--bg2:#111926;--card:#141d2b;--line:#1f2b3c;--fg:#e9eff8;--muted:#94a4ba;
--accent:#4ea8ff;--accent-d:#1b6fd0;--stage:#f2f5f9;--r:14px;--wrap:1180px}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--fg);
font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
line-height:1.8;font-size:15px}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{line-height:1.35;margin:0 0 .5em}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 20px}
.narrow{max-width:820px}
.muted{color:var(--muted)}
.nono{color:var(--muted);font-size:13px}
.ic{width:18px;height:18px;fill:currentColor;flex:none}
.btn{display:inline-flex;align-items:center;gap:8px;background:var(--accent);color:#04121f;
border-radius:10px;padding:10px 18px;font-weight:600;border:0;cursor:pointer;font-size:14px;
font-family:inherit;transition:.18s}
.btn:hover{background:#6fb9ff;transform:translateY(-1px)}
.btn.ghost{background:transparent;color:var(--fg);border:1px solid var(--line)}
.btn.ghost:hover{border-color:var(--accent);color:var(--accent);background:transparent}
.btn-lg{padding:14px 26px;font-size:15px}
.btn-sm{padding:8px 14px;font-size:13px}
/* header */
.hd{position:sticky;top:0;z-index:30;background:rgba(11,16,23,.86);backdrop-filter:blur(12px);
border-bottom:1px solid var(--line)}
.hdin{display:flex;align-items:center;gap:22px;height:64px}
.logo{display:flex;flex-direction:column;line-height:1.15}
.logo b{font-size:17px;letter-spacing:.5px}
.logo i{font-style:normal;font-size:10px;color:var(--muted);letter-spacing:2px}
.nav{display:flex;gap:4px;margin-left:auto}
.nav a{padding:8px 14px;border-radius:9px;font-size:14px;color:#c3cfe0}
.nav a:hover{background:#182233;color:#fff}
.nav a.on{color:var(--accent);background:#132133}
.hdr{display:flex;align-items:center;gap:10px}
.mbtn{display:none;background:transparent;border:1px solid var(--line);color:var(--fg);
border-radius:9px;padding:6px 11px;font-size:16px;cursor:pointer}
/* hero */
/* ⚠️ hero 图的 CSS 变量**不能叫 --bg**:--bg 是背景色,重名会让图盖住底色(第一版就撞了)。
   用 --hero,由页面内联 style 传进来。 */
.hero{position:relative;padding:96px 0 60px;background-color:var(--bg);overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;background-image:var(--hero);
background-position:center;background-size:cover;background-repeat:no-repeat}
.hero::after{content:"";position:absolute;inset:0;
background:linear-gradient(180deg,rgba(11,16,23,.58) 0%,rgba(11,16,23,.82) 52%,var(--bg) 100%)}
.hero .hin{position:relative;z-index:2}
.eyebrow{display:inline-block;color:var(--accent);font-size:13px;letter-spacing:1px;
border:1px solid #23405f;background:#0f1a28;border-radius:999px;padding:5px 14px;margin-bottom:20px}
.hero h1{font-size:44px;margin-bottom:18px;letter-spacing:1px}
.hero p{max-width:640px;color:#c3cfe0;font-size:16px}
.cta{display:flex;gap:12px;flex-wrap:wrap;margin-top:26px}
.stats{display:flex;gap:38px;flex-wrap:wrap;margin-top:52px;padding-top:26px;border-top:1px solid var(--line)}
.st b{display:block;font-size:30px;color:#fff}
.st span{font-size:13px;color:var(--muted)}
/* sections */
.sec{padding:64px 0}
.sec-alt{background:var(--bg2)}
.h2{font-size:26px;margin-bottom:26px}
.bhead{padding:14px 20px 0}
.bhead p{color:var(--muted);margin-bottom:8px}
.ghead{display:flex;align-items:baseline;gap:12px;margin:34px 0 16px}
.ghead h3{font-size:18px;margin:0}
.ghead span{font-size:13px;color:var(--muted)}
/* 产品线大卡 */
.lines{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.line{background:var(--card);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;
transition:.2s;display:block}
.line:hover{transform:translateY(-3px);border-color:#2c4a6b}
.limg img{aspect-ratio:16/9;object-fit:cover;width:100%}
.lbody{padding:22px 24px 26px}
.lbody h3{font-size:19px}
.lbody p{color:var(--muted);font-size:14px}
.more{display:inline-flex;align-items:center;gap:8px;color:var(--accent);font-size:14px;
font-weight:600;margin-top:10px}
/* 服务 */
.svcs{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.svc{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:22px}
.svc h3{font-size:16px;color:#fff}
.svc p{color:var(--muted);font-size:13.5px;margin:0}
/* 场景 */
.scenes{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.scene{position:relative;border-radius:var(--r);overflow:hidden;display:block}
.scene img{aspect-ratio:4/3;object-fit:cover;width:100%;transition:.4s}
.scene:hover img{transform:scale(1.04)}
.scene span{position:absolute;left:16px;bottom:14px;font-size:17px;font-weight:600;
text-shadow:0 2px 12px rgba(0,0,0,.7)}
.scene em{position:absolute;inset:0;background:linear-gradient(180deg,transparent 45%,rgba(6,10,16,.88))}
.scene em,.scene span{pointer-events:none}
/* why */
.whywrap{display:grid;grid-template-columns:1.35fr .85fr;gap:34px;align-items:start}
.why{list-style:none;padding:0;margin:0}
.why li{display:flex;gap:12px;align-items:flex-start;padding:11px 0;border-bottom:1px solid var(--line);
color:#c3cfe0}
.why svg{color:var(--accent);margin-top:6px}
.whycta{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:26px}
.whycta h3{font-size:18px}
.whycta p{color:var(--muted);font-size:14px}
/* 产品卡 */
.grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.pcard{background:var(--card);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;
display:flex;flex-direction:column;transition:.2s}
.pcard:hover{transform:translateY(-3px);border-color:#2c4a6b}
.pimg{background:radial-gradient(120% 100% at 50% 0%,#ffffff,var(--stage));padding:16px;
aspect-ratio:4/3;display:flex;align-items:center;justify-content:center}
.pimg img{max-height:100%;object-fit:contain;filter:drop-shadow(0 8px 18px rgba(20,35,60,.16))}
.pbody{padding:15px 16px 18px;display:flex;flex-direction:column;gap:5px}
.pbody h3{font-size:15px;margin:0}
.pmeta{font-size:12px;color:var(--accent);letter-spacing:.3px}
.pbody p{font-size:12.5px;color:var(--muted);margin:0;line-height:1.7;
display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
/* 列表页头 + 筛选 */
.phead{padding:56px 0 26px;background:var(--bg2);border-bottom:1px solid var(--line)}
.phead h1{font-size:32px}
.phead p{color:var(--muted);margin:0}
.picker{display:flex;gap:16px;align-items:center;flex-wrap:wrap;margin-top:22px}
.srch{display:flex;align-items:center;gap:10px;background:var(--card);border:1px solid var(--line);
border-radius:10px;padding:9px 14px;color:var(--muted)}
.srch input{background:transparent;border:0;outline:0;color:var(--fg);font-size:14px;width:270px;
font-family:inherit}
.chips{display:flex;gap:8px}
.chip{background:var(--card);border:1px solid var(--line);color:#c3cfe0;border-radius:999px;
padding:8px 16px;font-size:13.5px;cursor:pointer;font-family:inherit}
.chip.on{background:#132133;border-color:var(--accent);color:var(--accent)}
.nomatch{padding:30px 20px 60px;color:var(--muted)}
/* 面包屑 */
.crumb{padding:22px 0 0;font-size:13px;color:var(--muted)}
.crumb a:hover{color:var(--accent)}
/* 详情 */
.pdet{display:grid;grid-template-columns:1.1fr 1fr;gap:44px;align-items:start}
.gmain{background:radial-gradient(120% 100% at 50% 0%,#ffffff,var(--stage));border-radius:var(--r);
padding:26px;display:flex;align-items:center;justify-content:center;min-height:280px}
.gmain img{max-height:380px;object-fit:contain}
.gthumbs{display:flex;gap:10px;margin-top:12px;flex-wrap:wrap}
.gthumb{width:74px;height:74px;object-fit:contain;background:var(--stage);border-radius:10px;
padding:6px;cursor:pointer;border:1px solid transparent}
.gthumb.on{border-color:var(--accent)}
.brandchip{display:inline-block;font-size:12px;color:var(--accent);border:1px solid #23405f;
background:#0f1a28;border-radius:999px;padding:4px 12px;margin-bottom:12px}
.pdet-r h1{font-size:27px}
.model{color:var(--muted);font-size:14px;margin-bottom:14px;letter-spacing:.4px}
.ecos{display:flex;gap:8px;flex-wrap:wrap;align-items:center;margin:14px 0 4px}
.ek{font-size:12.5px;color:var(--muted)}
.ec{font-size:12.5px;background:#122033;border:1px solid #24405f;border-radius:6px;padding:3px 9px;
color:#bcd6f5}
.pdesc{color:#c3cfe0;font-size:14.5px}
.spec{width:100%;border-collapse:collapse;background:var(--card);border:1px solid var(--line);
border-radius:var(--r);overflow:hidden}
.spec th,.spec td{padding:12px 16px;border-bottom:1px solid var(--line);font-size:14px;
vertical-align:top;text-align:left}
.spec th{width:150px;color:var(--muted);font-weight:400;background:#131c29;white-space:nowrap}
.spec tr:last-child th,.spec tr:last-child td{border-bottom:0}
/* 方案 */
.sol{display:grid;grid-template-columns:1.05fr 1fr;gap:34px;align-items:center;
padding:30px 0;border-bottom:1px solid var(--line)}
.sol:last-child{border-bottom:0}
.sol:nth-child(even) .solimg{order:2}
.solimg img{border-radius:var(--r);aspect-ratio:3/2;object-fit:cover}
.solbody h2{font-size:23px}
.solbody p{color:var(--muted)}
.solp{display:flex;gap:8px;flex-wrap:wrap;margin:14px 0 18px}
.solp span{font-size:12.5px;background:#122033;border:1px solid #24405f;color:#bcd6f5;
border-radius:6px;padding:4px 10px}
.steps{list-style:none;counter-reset:s;padding:0;margin:0;display:grid;
grid-template-columns:repeat(5,1fr);gap:16px}
.steps li{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:20px}
.steps b{display:block;font-size:22px;color:var(--accent);line-height:1.2}
.steps span{display:block;font-weight:600;margin:6px 0 4px}
.steps em{font-style:normal;font-size:13px;color:var(--muted)}
/* 关于 */
.bcards{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.bcard{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:26px}
.bcard h3{font-size:19px;display:flex;align-items:baseline;gap:10px}
.bcard em{font-style:normal;font-size:12px;color:var(--muted);letter-spacing:1px}
.bcard p{color:var(--muted);font-size:14px;margin:0}
.ecolist{display:flex;gap:10px;flex-wrap:wrap;margin-top:16px}
.sgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:12px;margin-top:18px}
.scard{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:14px 16px;
display:flex;align-items:baseline;justify-content:space-between;gap:8px}
.scard b{font-size:14.5px;font-weight:600}
.scard span{font-size:12.5px;color:var(--muted)}
.ecolist span{background:var(--card);border:1px solid var(--line);border-radius:8px;
padding:9px 16px;font-size:13.5px;color:#c3cfe0}
.lead{font-size:15.5px;color:#c9d5e4}
/* 联系 */
.cwrap{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:start}
.crow{display:flex;gap:16px;align-items:baseline;padding:16px 0;border-bottom:1px solid var(--line)}
.crow span{width:80px;color:var(--muted);font-size:13.5px;flex:none}
.crow b{font-size:17px}
.crow .big{font-size:26px;color:var(--accent);font-weight:700;letter-spacing:.5px}
.cform{display:flex;flex-direction:column;gap:16px;background:var(--card);border:1px solid var(--line);
border-radius:var(--r);padding:26px}
.cform label{display:flex;flex-direction:column;gap:7px;font-size:13.5px;color:var(--muted)}
.cform input,.cform textarea{background:#0f1826;border:1px solid var(--line);border-radius:9px;
padding:11px 13px;color:var(--fg);font-size:14px;font-family:inherit;outline:0}
.cform input:focus,.cform textarea:focus{border-color:var(--accent)}
.cform.pending p{margin:0;color:#c3cfe0;font-size:14px}
/* 蜜罐:留一个真人看不见也不该填的输入框(云枢侧按 hp 有值判脚本) */
.cform .hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}
.cmsg{margin-top:4px;font-size:14px;padding:10px 12px;border-radius:9px}
.cmsg.ok{background:#0f2a1c;border:1px solid #1f6b45;color:#8ff0bb}
.cmsg.err{background:#2a1414;border:1px solid #6b2020;color:#ffb4b4}
.terr h1{font-size:56px;color:var(--accent);margin-bottom:6px}
/* footer */
.ft{background:#080d14;border-top:1px solid var(--line);padding:52px 0 22px;margin-top:20px}
.ftin{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:34px}
.ft .logo{margin-bottom:12px}
.fcol p{color:var(--muted);font-size:13.5px;max-width:340px}
.fcol h4{font-size:14px;color:#fff;margin-bottom:12px}
.flinks{display:flex;flex-direction:column;gap:8px;font-size:13.5px;color:var(--muted)}
.flinks a:hover{color:var(--accent)}
.fbot{display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;margin-top:36px;
padding-top:18px;border-top:1px solid var(--line);font-size:12.5px;color:var(--muted)}
/* 响应式 */
@media(max-width:1000px){
.grid,.scenes,.svcs{grid-template-columns:repeat(2,1fr)}
.steps{grid-template-columns:repeat(2,1fr)}
.pdet,.sol,.cwrap,.whywrap,.lines,.bcards{grid-template-columns:1fr}
.sol:nth-child(even) .solimg{order:0}
.ftin{grid-template-columns:1fr 1fr}
.hero h1{font-size:34px}
}
@media(max-width:680px){
.nav{position:absolute;top:64px;left:0;right:0;background:#0d1622;border-bottom:1px solid var(--line);
flex-direction:column;padding:12px;display:none;margin:0}
.nav.open{display:flex}
.mbtn{display:block}
.hdr .btn span{display:none}
.hdr .btn{padding:8px 10px}
.grid,.scenes,.svcs,.steps{grid-template-columns:1fr 1fr}
.hero{padding:70px 0 40px}
.hero h1{font-size:27px}
.stats{gap:22px}
.st b{font-size:24px}
.sec{padding:44px 0}
.h2{font-size:21px}
.srch input{width:100%}
.srch{width:100%}
.pdet-r h1{font-size:22px}
.crow .big{font-size:22px}
.ftin{grid-template-columns:1fr}
}
@media(max-width:440px){.grid,.scenes,.svcs,.steps{grid-template-columns:1fr}}