*{margin:0;padding:0;box-sizing:border-box}
:root{--navy:#0A2540;--navy2:#123A63;--navy3:#0E3055;--gold:#D4512A;--gold2:#F0A46C;
--cyan:#12B3C8;--ink:#16222E;--muted:#5E7080;--line:#E4EAF0;--bg2:#F5F8FB;--w:1200px}
html{scroll-behavior:smooth}
html,body{max-width:100%;overflow-x:hidden}
body{font-family:"Microsoft YaHei","PingFang SC","Hiragino Sans GB","Source Han Sans SC",sans-serif;
color:var(--ink);background:#fff;line-height:1.75;-webkit-font-smoothing:antialiased;font-size:15px}
a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto;display:block;border:0}
.wrap{width:100%;max-width:var(--w);margin:0 auto;padding:0 24px}
h1,h2,h3,h4{font-weight:700;line-height:1.3}
.gold{color:var(--gold)}

/* ===== 顶栏 ===== */
.topbar{background:var(--navy);color:#B9C7D6;font-size:12.5px;padding:7px 0}
.topbar .wrap{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap}
.topbar b{color:var(--gold2);font-weight:600}
header.hd{position:sticky;top:0;z-index:80;background:#fff;border-bottom:1px solid var(--line);transition:.25s}
header.hd.on{box-shadow:0 6px 24px rgba(10,37,64,.10)}
.hd .wrap{display:flex;align-items:center;justify-content:space-between;height:74px;gap:20px}
.logo{display:flex;align-items:center;gap:11px;flex:0 0 auto}
.logo img{height:46px;width:auto;display:block}
.logo svg{width:41px;height:41px;flex:0 0 auto}
.logo .t{display:flex;flex-direction:column;line-height:1.15}
.logo .t b{font-size:19px;letter-spacing:1.5px;color:var(--navy)}
.logo .t i{font-style:normal;font-size:9.5px;letter-spacing:2.2px;color:var(--muted)}
nav.nv{display:flex;gap:2px;flex:1 1 auto;justify-content:center}
nav.nv a{padding:9px 15px;font-size:14.5px;color:#33475A;border-radius:4px;white-space:nowrap}
nav.nv a:hover{color:var(--navy);background:var(--bg2)}
nav.nv a.act{color:var(--navy);font-weight:700}
nav.nv a.act::after{content:"";display:block;height:2px;background:var(--gold);margin:4px auto -3px;width:20px}
.hd-cta{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.hd-tel{display:flex;flex-direction:column;text-align:right;line-height:1.2}
.hd-tel i{font-style:normal;font-size:11px;color:var(--muted)}
.hd-tel b{font-size:17px;color:var(--navy);letter-spacing:.3px}
.hd-tel a{text-decoration:none}
.hd-tel .hd-mob{font-size:21px;font-weight:800;color:var(--gold);letter-spacing:.6px;
  font-variant-numeric:tabular-nums;display:inline-block;line-height:1.15}
.hd-tel .hd-mob:hover{color:var(--gold2)}
.hd-tel .hd-sub{font-size:11.5px;color:var(--muted);letter-spacing:.2px;margin-top:1px}
.topbar .tb-tel a{color:inherit;text-decoration:none}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:11px 24px;
border-radius:4px;font-size:14.5px;font-weight:600;transition:.22s;cursor:pointer;border:1px solid transparent}
.btn-gold{background:linear-gradient(135deg,#E2622F,var(--gold));color:#fff}
.btn-tel{font-size:16px;letter-spacing:.4px;box-shadow:0 8px 20px rgba(212,81,42,.34);
  font-variant-numeric:tabular-nums}
.btn-tel:hover{transform:translateY(-1px);box-shadow:0 10px 24px rgba(212,81,42,.44)}
.btn-gold:hover{filter:brightness(1.08);transform:translateY(-2px);box-shadow:0 8px 20px rgba(212,81,42,.35)}
.btn-line{border-color:rgba(255,255,255,.55);color:#fff}
.btn-line:hover{background:rgba(255,255,255,.14);transform:translateY(-2px)}
.btn-navy{background:var(--navy);color:#fff}
.btn-navy:hover{background:var(--navy2);transform:translateY(-2px)}
.burger{display:none;width:40px;height:40px;border:1px solid var(--line);border-radius:4px;background:#fff;
align-items:center;justify-content:center;flex-direction:column;gap:4px;cursor:pointer}
.burger span{width:18px;height:2px;background:var(--navy)}

/* ===== 首屏 ===== */
.hero{position:relative;min-height:560px;display:flex;align-items:center;overflow:hidden;color:#fff;
background:linear-gradient(118deg,#06182B 0%,#0A2540 44%,#123A63 100%)}
.hero::before{content:"";position:absolute;inset:0;
background:radial-gradient(760px 420px at 82% 22%,rgba(212,81,42,.18),transparent 62%),
radial-gradient(600px 360px at 6% 92%,rgba(18,179,200,.13),transparent 66%)}
.hero::after{content:"";position:absolute;inset:0;opacity:.5;
background-image:linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),
linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);background-size:64px 64px}
.hero .wrap{position:relative;z-index:2;padding-top:58px;padding-bottom:56px}
.hero-grid{display:grid;grid-template-columns:1.12fr .88fr;gap:52px;align-items:center}
.hero .eyebrow{display:inline-flex;align-items:center;gap:10px;font-size:12.5px;letter-spacing:3px;
color:var(--gold2);margin-bottom:18px}
.hero .eyebrow::before{content:"";width:38px;height:1px;background:var(--gold)}
.hero h1{font-size:36px;letter-spacing:.5px;margin-bottom:16px;text-wrap:balance;
text-shadow:0 2px 18px rgba(0,0,0,.3)}
.hero h1 em{font-style:normal;color:var(--gold2);display:block;font-size:23px;margin-top:14px;letter-spacing:2px}
.hero p.lead{font-size:15.5px;color:#D3DEE9;max-width:640px;margin-bottom:12px}
.hero .kw{font-size:13.2px;color:#93A9BE;margin-bottom:28px;max-width:660px;line-height:1.9}
.hero .acts{display:flex;gap:14px;flex-wrap:wrap}
.hero-shot{position:relative}
.hero-shot img{width:100%;border-radius:10px;box-shadow:0 30px 66px rgba(0,0,0,.5)}
.hero-shot::after{content:"";position:absolute;inset:-13px;border:1px solid rgba(212,81,42,.32);
border-radius:14px;pointer-events:none}
.hero .stats{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;margin-top:46px;
background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.16)}
.hero .stats div{background:rgba(6,24,42,.58);padding:18px 16px}
.hero .stats b{display:block;font-size:26px;color:var(--gold2);letter-spacing:.5px}
.hero .stats span{font-size:12.8px;color:#B7C6D5}

/* ===== 通用区块 ===== */
section{padding:82px 0}
section.alt{background:var(--bg2)}
.sec-h{text-align:center;max-width:780px;margin:0 auto 46px}
.sec-h .eyebrow{font-size:12.5px;letter-spacing:3.5px;color:var(--gold);font-weight:700;text-transform:uppercase}
.sec-h h2{font-size:31px;margin:12px 0 14px;color:var(--navy)}
.sec-h h2::after{content:"";display:block;width:46px;height:3px;background:var(--gold);margin:16px auto 0}
.sec-h p{color:var(--muted);font-size:15px}
.grid{display:grid;gap:24px}
.grid>*,.about>*,.art>*,.ct-grid>*,.case-tags>*{min-width:0}
.g4{grid-template-columns:repeat(4,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.g2{grid-template-columns:repeat(2,1fr)}

/* 产品卡 */
.pcard{background:#fff;border:1px solid var(--line);border-radius:6px;overflow:hidden;transition:.28s;display:flex;flex-direction:column}
.pcard:hover{transform:translateY(-6px);box-shadow:0 16px 38px rgba(10,37,64,.13);border-color:#D2DCE6}
.pcard .ph{position:relative;background:#F7FAFC;aspect-ratio:1/1;overflow:hidden}
.pcard .ph img{width:100%;height:100%;object-fit:cover;transition:.5s}
.pcard:hover .ph img{transform:scale(1.05)}
.pcard .tag{position:absolute;left:12px;top:12px;background:rgba(10,37,64,.86);color:var(--gold2);
font-size:11.5px;padding:4px 10px;border-radius:2px;letter-spacing:.5px}
.pcard .bd{padding:18px 18px 20px;flex:1;display:flex;flex-direction:column}
.pcard h3{font-size:16.5px;color:var(--navy);margin-bottom:8px}
.pcard p{font-size:13.5px;color:var(--muted);flex:1}
.pcard .ft{margin-top:14px;padding-top:13px;border-top:1px dashed var(--line);display:flex;
justify-content:space-between;align-items:center}
.pcard .ft span{font-size:13px;color:var(--gold);font-weight:700}
.pcard .ft a{font-size:13px;color:var(--navy);font-weight:600}

/* 优势卡 */
.adv{background:#fff;border:1px solid var(--line);border-radius:6px;padding:30px 26px;transition:.28s}
.adv:hover{transform:translateY(-6px);box-shadow:0 16px 34px rgba(10,37,64,.10)}
.adv img{width:52px;height:52px;object-fit:contain;margin-bottom:16px}
.adv h3{font-size:17px;color:var(--navy);margin-bottom:10px}
.adv p{font-size:13.8px;color:var(--muted)}

/* 案例 */
.ccard{position:relative;overflow:hidden;border-radius:6px;aspect-ratio:4/3;background:#E9EFF5}
.ccard img{width:100%;height:100%;object-fit:cover;transition:.5s}
.ccard:hover img{transform:scale(1.06)}
.ccard .cap{position:absolute;left:0;right:0;bottom:0;padding:26px 16px 13px;color:#fff;font-size:14px;
background:linear-gradient(transparent,rgba(6,24,42,.86))}
.case-tags{display:flex;flex-wrap:wrap;gap:9px;justify-content:center;margin-bottom:34px}
.case-tags span{border:1px solid var(--line);background:#fff;color:#3A5066;font-size:13.5px;
padding:7px 15px;border-radius:999px}
.case-tags span:hover{border-color:var(--gold);color:var(--navy)}

/* FAQ */
.faq{max-width:900px;margin:0 auto}
.faq details{background:#fff;border:1px solid var(--line);border-radius:6px;margin-bottom:13px;overflow:hidden}
.faq details[open]{border-color:#CFDCE8;box-shadow:0 8px 22px rgba(10,37,64,.07)}
.faq summary{cursor:pointer;padding:19px 54px 19px 22px;font-size:15.5px;font-weight:600;color:var(--navy);
position:relative;list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:22px;top:50%;transform:translateY(-50%);
font-size:21px;color:var(--gold);font-weight:400}
.faq details[open] summary::after{content:"\2212"}
.faq .ans{padding:0 22px 20px;font-size:14.3px;color:var(--muted)}

/* 关于 */
.about{display:grid;grid-template-columns:1.08fr .92fr;gap:52px;align-items:center}
.about .txt h2{font-size:29px;color:var(--navy);margin-bottom:18px}
.about .txt h2::after{content:"";display:block;width:46px;height:3px;background:var(--gold);margin-top:16px}
.about .txt p{color:#41566B;font-size:14.8px;margin-bottom:14px;text-align:justify}
.about .pic{position:relative}
.about .pic img{border-radius:6px;box-shadow:0 20px 46px rgba(10,37,64,.16)}
.badge{position:absolute;right:-16px;bottom:-18px;background:var(--navy);color:#fff;padding:20px 24px;
border-radius:6px;text-align:center;box-shadow:0 14px 30px rgba(10,37,64,.28)}
.badge b{display:block;font-size:30px;color:var(--gold2)}
.badge span{font-size:12.5px;color:#B7C6D5}
.mvv{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:44px}
.mvv div{background:#fff;border:1px solid var(--line);border-left:3px solid var(--gold);padding:20px 20px}
.mvv h4{font-size:14.5px;color:var(--navy);margin-bottom:7px}
.mvv p{font-size:13.3px;color:var(--muted)}

/* 内页头 */
.page-hd{background:var(--navy) center/cover no-repeat;position:relative;padding:78px 0 66px;color:#fff}
.page-hd::after{content:"";position:absolute;inset:0;
background:linear-gradient(96deg,rgba(5,20,36,.97) 0%,rgba(8,29,50,.92) 46%,rgba(10,37,64,.74) 100%)}
.page-hd .wrap{position:relative;z-index:2}
.page-hd h1{font-size:33px;margin-bottom:12px}
.page-hd .crumb{font-size:13.5px;color:#A9BCCD}
.page-hd .crumb a:hover{color:var(--gold2)}
.page-hd p{color:#C4D1DE;font-size:14.5px;max-width:720px;margin-top:10px}

/* 详情/正文 */
.art{display:grid;grid-template-columns:1fr 300px;gap:44px;align-items:start}
.art h2{font-size:23px;color:var(--navy);margin:34px 0 14px;padding-left:14px;border-left:4px solid var(--gold)}
.art h2:first-child{margin-top:0}
.art h3{font-size:17px;color:var(--navy);margin:24px 0 10px}
.art p,.art li{font-size:14.8px;color:#41566B;margin-bottom:11px;text-align:justify}
.art ul,.art ol{padding-left:22px;margin-bottom:14px}
.art img{border-radius:6px;margin:18px 0;box-shadow:0 12px 30px rgba(10,37,64,.10)}
.art table{width:100%;border-collapse:collapse;margin:18px 0;font-size:14px}
.art th,.art td{border:1px solid var(--line);padding:11px 14px;text-align:left}
.art th{background:var(--navy);color:#fff;font-weight:600}
.art tr:nth-child(even) td{background:#FAFCFE}
.side{position:sticky;top:94px}
.side .box{border:1px solid var(--line);border-radius:6px;overflow:hidden;margin-bottom:20px}
.side .box h4{background:var(--navy);color:#fff;font-size:15px;padding:13px 17px}
.side .box ul{list-style:none;padding:8px 0}
.side .box li a{display:block;padding:10px 17px;font-size:14px;color:#3A5066;border-bottom:1px solid #F1F5F9}
.side .box li a:hover{background:var(--bg2);color:var(--navy);padding-left:22px}
.side .cta{background:linear-gradient(160deg,var(--navy),var(--navy2));color:#fff;border-radius:6px;padding:24px 20px;text-align:center}
.side .cta b{display:block;font-size:15px;margin-bottom:6px}
.side .cta .tel{font-size:21px;color:var(--gold2);font-weight:700;margin:10px 0 14px;letter-spacing:.4px}
.side .cta p{font-size:12.8px;color:#B7C6D5;margin-bottom:16px}

/* 联系 */
.ct-grid{display:grid;grid-template-columns:1fr 1.15fr;gap:40px;align-items:start}
.ct-item{display:flex;gap:16px;padding:20px 0;border-bottom:1px dashed var(--line)}
.ct-item img{width:38px;height:38px;object-fit:contain;flex:0 0 auto}
.ct-item h4{font-size:14.5px;color:var(--navy);margin-bottom:4px}
.ct-item p{font-size:15px;color:#33475A}
.ct-item p.big{font-size:20px;font-weight:700;color:var(--navy);letter-spacing:.5px}
form .fld{margin-bottom:15px}
form label{display:block;font-size:13.5px;color:#3A5066;margin-bottom:6px}
form input,form textarea,form select{width:100%;border:1px solid var(--line);border-radius:4px;
padding:11px 13px;font-size:14.5px;font-family:inherit;background:#fff;outline:none;transition:.2s}
form input:focus,form textarea:focus{border-color:var(--gold);box-shadow:0 0 0 3px rgba(201,169,97,.14)}
form textarea{min-height:118px;resize:vertical}
.form-panel{background:#fff;border:1px solid var(--line);border-radius:6px;padding:28px;
box-shadow:0 14px 34px rgba(10,37,64,.07)}
.form-panel h3{font-size:19px;color:var(--navy);margin-bottom:6px}
.form-panel .hint{font-size:13px;color:var(--muted);margin-bottom:20px}

/* CTA 条 */
.cta-bar{background:linear-gradient(120deg,var(--navy) 0%,var(--navy2) 60%,#16456F 100%);color:#fff;padding:56px 0}
.cta-bar .wrap{display:flex;justify-content:space-between;align-items:center;gap:28px;flex-wrap:wrap}
.cta-bar h3{font-size:25px;margin-bottom:8px}
.cta-bar p{color:#C0CDDA;font-size:14.5px}
.cta-bar .tel{font-size:30px;color:var(--gold2);font-weight:700;letter-spacing:1px}

/* 页脚 */
footer{background:#071A2D;color:#8FA3B6;font-size:13.6px;padding:58px 0 0}
footer .cols{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.3fr;gap:36px}
footer h4{color:#fff;font-size:15.5px;margin-bottom:18px;position:relative;padding-bottom:11px}
footer h4::after{content:"";position:absolute;left:0;bottom:0;width:28px;height:2px;background:var(--gold)}
footer a:hover{color:var(--gold2)}
footer ul{list-style:none}
footer li{margin-bottom:9px}
footer .fl{display:flex;align-items:center;gap:12px;margin-bottom:18px}
footer .fl img{height:42px;width:auto}
footer .fl svg{width:38px;height:38px}
footer .fl b{color:#fff;font-size:18px;letter-spacing:1.5px}
footer .fl i{font-style:normal;font-size:9.5px;letter-spacing:2px;color:#7C93A8}
footer .cpy{margin-top:44px;border-top:1px solid rgba(255,255,255,.09);padding:19px 0;font-size:12.8px;
display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;color:#7A8FA3}

/* 侧浮 */
.float{position:fixed;right:18px;bottom:26px;z-index:90;display:flex;flex-direction:column;gap:9px}
.float a,.float button{width:52px;height:52px;border-radius:6px;background:#fff;border:1px solid var(--line);
display:flex;flex-direction:column;align-items:center;justify-content:center;gap:1px;
box-shadow:0 8px 22px rgba(10,37,64,.13);cursor:pointer;transition:.22s;padding:0}
.float a:hover,.float button:hover{background:var(--navy);border-color:var(--navy);color:#fff}
.float img{width:22px;height:22px;object-fit:contain}
.float span{font-size:10px;color:#4A5F73}
.float a:hover span,.float button:hover span{color:#fff}
.float .top{display:none}
.float .top.on{display:flex}

/* 表格/参数 */
.params{width:100%;border-collapse:collapse;font-size:14px;margin:20px 0}
.params th,.params td{border:1px solid var(--line);padding:12px 14px}
.params th{background:var(--bg2);color:var(--navy);text-align:left;width:180px}

@media(max-width:1040px){
 nav.nv{display:none}
 .burger{display:flex}
 nav.nv.open{display:flex;position:absolute;left:0;right:0;top:100%;background:#fff;flex-direction:column;
 padding:12px 18px;box-shadow:0 16px 30px rgba(10,37,64,.14);border-top:1px solid var(--line);gap:0}
 nav.nv.open a{padding:13px 8px;border-bottom:1px solid #F2F6FA}
 .hd-tel i{display:none}
 .hd-tel b{font-size:15px;letter-spacing:0}
 .hd-tel .hd-mob{font-size:16px}
 .hd-tel .hd-sub{display:none}
 .btn-tel{font-size:14px}
 .hero-grid{grid-template-columns:1fr;gap:36px}
 .hero-shot{max-width:520px;margin:0 auto;order:-1}
 .hero h1{font-size:32px}.hero h1 em{font-size:21px}
 .hero .stats{grid-template-columns:repeat(2,1fr)}
 .g4,.g3{grid-template-columns:repeat(2,1fr)}
 .about,.art,.ct-grid,.g2{grid-template-columns:1fr}
 .side{position:static}
 .mvv{grid-template-columns:repeat(2,1fr)}
 footer .cols{grid-template-columns:1fr 1fr}
 .sec-h h2,.page-hd h1{font-size:25px}
}
@media(max-width:620px){
 .topbar{padding:6px 0}
 .topbar .wrap{justify-content:center}
 .topbar .wrap>div:first-child{display:none}
 .wrap{padding:0 18px}
 section{padding:56px 0}
 .g4,.g3{grid-template-columns:1fr}
 footer .cols{grid-template-columns:1fr}
 .hero .stats{grid-template-columns:1fr 1fr}
 .cta-bar h3{font-size:21px}.cta-bar .tel{font-size:24px}
 .logo .t b{font-size:16.5px}
}