/* ===== 设计令牌 ===== */
:root{
  --blue:#004a99; --blue-d:#003a78; --blue-l:#00b0f0; --gold:#ffc400;
  --ink:#1d2733; --gray:#6b7685; --line:#e6ebf1; --bg:#f5f8fc; --white:#fff;
  --shadow:0 6px 24px rgba(0,58,120,.10);
}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:"Microsoft YaHei","PingFang SC","Hiragino Sans GB",sans-serif;color:var(--ink);line-height:1.7;background:var(--white)}
a{text-decoration:none;color:inherit}
img{max-width:100%;display:block}
button{font-family:inherit}
.wrap{max-width:1200px;margin:0 auto;padding:0 20px}

/* ===== 顶部热线条 ===== */
.topbar{background:var(--blue-d);color:#dce7f5;font-size:13px}
.topbar .wrap{display:flex;justify-content:space-between;align-items:center;height:38px}
.topbar .slogan{letter-spacing:2px}
.topbar .tel{color:#fff;font-weight:700}
.topbar .tel b{color:var(--gold);font-size:16px;margin-left:6px}

/* ===== 头部 LOGO ===== */
header{background:var(--white);box-shadow:0 2px 10px rgba(0,0,0,.05);position:sticky;top:0;z-index:100}
.head-in{display:flex;justify-content:space-between;align-items:center;height:80px}
.logo{display:flex;align-items:center;gap:12px}
.logo .mark{width:46px;height:46px;border-radius:10px;background:linear-gradient(135deg,var(--blue),var(--blue-l));display:flex;align-items:center;justify-content:center;color:#fff;font-weight:800;font-size:20px}
.logo .txt strong{display:block;font-size:22px;color:var(--blue);letter-spacing:1px}
.logo .txt span{font-size:11px;color:var(--gray);letter-spacing:1px}
.head-tel{text-align:right;color:var(--gray);font-size:13px}
.head-tel .n{color:var(--blue);font-size:22px;font-weight:800;letter-spacing:1px}

/* ===== 导航 ===== */
nav{background:var(--blue);position:sticky;top:80px;z-index:99}
nav .wrap{display:flex}
nav> .wrap > a{color:#fff;padding:0 26px;height:56px;display:flex;align-items:center;font-size:16px;position:relative;transition:.25s}
nav> .wrap > a:hover,nav> .wrap > a.active{background:var(--blue-d);color:var(--gold)}
nav .has{position:relative}
nav .has > a{color:#fff;padding:0 26px;height:56px;display:flex;align-items:center;font-size:16px;transition:.25s}
nav .has:hover > a,nav .has.active > a{background:var(--blue-d);color:var(--gold)}
nav .drop{position:absolute;top:56px;left:0;background:#fff;box-shadow:var(--shadow);width:230px;display:none;flex-direction:column;padding:6px 0;border-top:3px solid var(--gold)}
nav .has:hover .drop{display:flex}
nav .drop a{padding:11px 22px;color:var(--ink);font-size:14px;border-left:3px solid transparent}
nav .drop a:hover{background:var(--bg);color:var(--blue);border-left-color:var(--blue-l)}

/* ===== 主视觉 ===== */
.hero{height:440px;background:
   linear-gradient(105deg,rgba(0,58,120,.92) 0%,rgba(0,74,153,.78) 45%,rgba(0,176,240,.35) 100%),
   repeating-linear-gradient(45deg,rgba(255,255,255,.04) 0 2px,transparent 2px 22px),
   linear-gradient(180deg,#062a56,#0a4f95);
   color:#fff;display:flex;align-items:center;position:relative;overflow:hidden}
.hero .tag{color:var(--gold);letter-spacing:6px;font-size:15px;margin-bottom:14px}
.hero h1{font-size:46px;line-height:1.35;margin-bottom:14px;letter-spacing:2px}
.hero h1 em{font-style:normal;color:var(--gold)}
.hero p.sub{font-size:18px;color:#d6e6fb;letter-spacing:3px}
.hero .chips{margin-top:28px;display:flex;gap:14px;flex-wrap:wrap}
.hero .chips span{border:1px solid rgba(255,255,255,.4);padding:7px 18px;border-radius:30px;font-size:14px}
.hero .wrap{position:relative;z-index:2;pointer-events:none}
.hero-bg{position:absolute;inset:0}
.hero-bg:before{content:"";position:absolute;inset:0;z-index:1;pointer-events:none;
   background:linear-gradient(100deg,rgba(3,32,64,.82) 0%,rgba(3,32,64,.5) 55%,rgba(3,32,64,.3) 100%)}
.hero-bg .slide{position:absolute;inset:0;background-size:cover;background-position:center;
   opacity:0;visibility:hidden;transition:opacity .8s ease,visibility 0s .8s}
.hero-bg .slide.on{opacity:1;visibility:visible;transition:opacity .8s ease}
.hero-dots{position:absolute;right:34px;bottom:26px;z-index:2;display:flex;gap:10px}
.hero-dots .dot{width:34px;height:4px;border-radius:2px;background:rgba(255,255,255,.45);cursor:pointer;transition:.3s}
.hero-dots .dot.on{background:var(--gold)}

/* ===== 板块通用 ===== */
section{padding:64px 0}
.sec-head{text-align:center;margin-bottom:40px}
.sec-head .en{color:var(--blue-l);letter-spacing:4px;font-size:14px;text-transform:uppercase}
.sec-head h2{font-size:30px;color:var(--blue);margin:6px 0}
.sec-head .line{width:60px;height:3px;background:var(--gold);margin:12px auto 0}
.bg-gray{background:var(--bg)}

/* ===== 产品中心卡片 ===== */
.grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.card{background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden;transition:.3s;box-shadow:0 2px 10px rgba(0,0,0,.03)}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.card .ph{height:150px;display:flex;align-items:center;justify-content:center;color:#fff;position:relative}
.card .ph small{position:absolute;right:12px;bottom:10px;font-size:12px;opacity:.85}
.card .bd{padding:16px 18px}
.card .bd h3{color:var(--blue);font-size:18px;margin-bottom:8px}
.card .bd p{color:var(--gray);font-size:13px;min-height:60px}
.card .bd a{display:inline-block;margin-top:6px;color:var(--blue-l);font-size:13px}
.card .bd a:hover{color:var(--blue)}
.c1{background:linear-gradient(135deg,#004a99,#00b0f0)}
.c2{background:linear-gradient(135deg,#0a5e3c,#22b573)}
.c3{background:linear-gradient(135deg,#b03a00,#ff8a3d)}
.c4{background:linear-gradient(135deg,#4b2a8a,#8f5bff)}
.c5{background:linear-gradient(135deg,#006a8f,#00c2c7)}
.c6{background:linear-gradient(135deg,#8a6d00,#ffc400)}
.c7{background:linear-gradient(135deg,#123b66,#3a7bd5)}
.c8{background:linear-gradient(135deg,#333,#7a8794)}

/* ===== 关于我们 ===== */
.about{display:grid;grid-template-columns:1.3fr 1fr;gap:40px;align-items:center}
.about .txt h3{color:var(--blue);font-size:24px;margin-bottom:14px}
.about .txt p{color:var(--gray);margin-bottom:12px;text-align:justify}
.stats{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.stat{background:linear-gradient(135deg,var(--blue),var(--blue-l));color:#fff;border-radius:12px;padding:22px;text-align:center}
.stat b{font-size:34px;display:block}
.stat span{font-size:14px;opacity:.92}

/* ===== 企业文化 ===== */
.cul{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.cul .i{background:#fff;border:1px solid var(--line);border-top:4px solid var(--blue-l);border-radius:10px;padding:26px 20px;text-align:center}
.cul .i h4{color:var(--blue);font-size:16px;margin-bottom:8px}
.cul .i p{color:var(--ink);font-weight:600;font-size:15px}

/* ===== 资质荣誉 ===== */
.hon{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.hon .h{background:var(--bg);border:1px dashed #cdd8e6;border-radius:10px;padding:20px;text-align:center;color:var(--blue);font-weight:600}

/* ===== 联系我们 ===== */
.contact{display:grid;grid-template-columns:1fr 1fr;gap:36px;align-items:stretch}
.contact .info .row{display:flex;gap:14px;padding:14px 0;border-bottom:1px solid var(--line);align-items:flex-start}
.contact .info .row b{color:var(--blue);display:block;font-size:14px;margin-bottom:2px}
.contact .info .row p{color:var(--gray);font-size:15px}
.form{background:#fff;border:1px solid var(--line);border-radius:12px;padding:26px;box-shadow:var(--shadow)}
.form h3{color:var(--blue);margin-bottom:16px}
.form input,.form textarea{width:100%;border:1px solid var(--line);border-radius:8px;padding:11px 14px;margin-bottom:14px;font-family:inherit;font-size:14px;color:var(--ink)}
.form input:focus,.form textarea:focus{outline:none;border-color:var(--blue-l)}
.form textarea{resize:vertical}
.form .btn{background:var(--blue);color:#fff;border:none;padding:13px;width:100%;border-radius:8px;font-size:16px;cursor:pointer;letter-spacing:2px;transition:.25s}
.form .btn:hover{background:var(--blue-d)}

/* ===== 页脚 ===== */
footer{background:#0a2540;color:#9fb3cc;font-size:13px;padding-top:46px}
.foot{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:30px;padding-bottom:34px}
.foot h5{color:#fff;font-size:16px;margin-bottom:14px}
.foot a{display:block;color:#9fb3cc;padding:5px 0}
.foot a:hover{color:var(--gold)}
.foot .desc{color:#8aa0bb;line-height:1.9;margin-top:10px}
.copy{border-top:1px solid #173356;padding:16px 0;text-align:center;color:#6f86a3}
.copy a{color:#6f86a3}

/* ===== 提示条 ===== */
.flash{position:fixed;top:24px;left:50%;transform:translateX(-50%);z-index:200;background:var(--blue);color:#fff;
  padding:12px 28px;border-radius:30px;box-shadow:0 8px 30px rgba(0,58,120,.28);font-size:15px;max-width:90vw;text-align:center}
.flash.err{background:#c0392b}

/* ===== 内页横幅 ===== */
.page-hero{color:#fff;padding:46px 0 40px;background:
   linear-gradient(105deg,rgba(0,58,120,.94) 0%,rgba(0,74,153,.84) 45%,rgba(0,176,240,.5) 100%),
   repeating-linear-gradient(45deg,rgba(255,255,255,.04) 0 2px,transparent 2px 22px),
   linear-gradient(180deg,#062a56,#0a4f95)}
.page-hero h1{font-size:28px;letter-spacing:2px;line-height:1.4}
.crumbs{font-size:13px;color:#c8dcf4;margin-top:8px;word-break:break-all}
.crumbs a{color:#c8dcf4}
.crumbs a:hover{color:var(--gold)}

/* ===== 内页两栏 ===== */
.page2{display:flex;gap:30px;align-items:flex-start;padding-top:48px;padding-bottom:64px}
.side{width:252px;flex:0 0 252px}
.side-box{background:#fff;border:1px solid var(--line);border-radius:10px;overflow:hidden;margin-bottom:20px;box-shadow:0 2px 10px rgba(0,0,0,.03)}
.side-box h3{margin:0;padding:14px 18px;font-size:16px;color:#fff;background:linear-gradient(135deg,var(--blue),var(--blue-l))}
.side-cats{list-style:none;margin:0;padding:8px}
.side-cats a{display:flex;justify-content:space-between;align-items:center;gap:8px;padding:10px 12px;border-radius:6px;font-size:14px;transition:.2s}
.side-cats a:hover{background:var(--bg);color:var(--blue)}
.side-cats a.on{background:var(--blue);color:#fff}
.side-cats em{font-style:normal;font-size:12px;color:#9aa7b6}
.side-cats a.on em{color:#cfe3fb}
.side-contact p{margin:0;padding:10px 18px;font-size:13px;color:var(--gray);border-bottom:1px dashed var(--line);word-break:break-all}
.side-contact p:last-child{border-bottom:0}
.content{flex:1;min-width:0}

/* ===== 产品列表卡片 ===== */
.prod-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.prod-cell{display:block;background:#fff;border:1px solid var(--line);border-radius:10px;overflow:hidden;transition:.3s;box-shadow:0 2px 10px rgba(0,0,0,.03)}
.prod-cell:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.p-img{display:block;aspect-ratio:4 / 3;overflow:hidden;background:var(--bg)}
.p-img img{width:100%;height:100%;object-fit:cover;transition:.4s}
.prod-cell:hover .p-img img{transform:scale(1.04)}
.p-name{display:block;padding:14px 16px;font-size:15px;color:var(--ink);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.prod-cell:hover .p-name{color:var(--blue)}

/* ===== 案例列表 ===== */
.case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.case-cell{display:block;background:#fff;border:1px solid var(--line);border-radius:10px;overflow:hidden;transition:.3s;box-shadow:0 2px 10px rgba(0,0,0,.03)}
.case-cell:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.case-img{display:block;aspect-ratio:16 / 9;overflow:hidden;background:var(--bg)}
.case-img img{width:100%;height:100%;object-fit:cover}
.case-name{display:block;padding:14px 16px;font-size:15px;color:var(--ink);line-height:1.5}
.case-cell:hover .case-name{color:var(--blue)}
.case-main-img{margin:0 0 20px}
.case-main-img img{width:100%;border:1px solid var(--line);border-radius:10px}

/* ===== 新闻列表 ===== */
.news-list{background:#fff;border:1px solid var(--line);border-radius:10px;padding:6px 0}
.news-item{display:flex;justify-content:space-between;align-items:center;gap:14px;padding:14px 22px;border-bottom:1px dashed var(--line)}
.news-item:last-child{border-bottom:0}
.news-title{flex:1;min-width:0;color:var(--ink);font-size:15px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.news-title:hover{color:var(--blue)}
.news-date{flex:0 0 auto;font-size:13px;color:#9aa7b6}

/* ===== 产品详情 ===== */
.detail-top{display:flex;gap:30px;flex-wrap:wrap}
.dt-img{width:46%;min-width:280px;flex:1 0 auto;max-width:560px}
.dt-img img{width:100%;border:1px solid var(--line);border-radius:10px;background:var(--bg)}
.thumbs{display:flex;gap:8px;margin-top:10px;flex-wrap:wrap}
.thumbs img{width:64px;height:64px;object-fit:cover;border:2px solid var(--line);border-radius:6px;cursor:pointer}
.thumbs img.on{border-color:var(--blue)}
.dt-info{flex:1;min-width:300px}
.params{width:100%;border-collapse:collapse;margin-bottom:18px}
.params th,.params td{border:1px solid var(--line);padding:9px 12px;font-size:13px;text-align:left}
.params th{background:var(--bg);color:var(--blue);width:130px;white-space:nowrap;font-weight:600}
.buy-tip{background:var(--bg);border-left:3px solid var(--blue-l);padding:10px 14px;color:var(--gray);font-size:14px}
.buy-line{margin:14px 0 0;color:var(--ink);font-size:15px}
.buy-line b{color:var(--blue);font-size:18px;letter-spacing:.5px}
.detail-sec{margin-top:40px}
.sec-title{margin:0 0 16px;font-size:18px;color:var(--blue);padding-left:12px;border-left:4px solid var(--gold)}

/* ===== 富文本 ===== */
.rich{line-height:1.9;color:#41505f}
.rich p{margin:0 0 12px;text-align:justify}
.rich img{max-width:100%;border-radius:8px}
.rich h2,.rich h3{color:var(--blue)}

/* ===== 联系我们页 ===== */
.contact-list{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;margin-bottom:30px}
.cl-item{background:var(--bg);border:1px solid var(--line);border-radius:10px;padding:16px 18px}
.cl-item span{display:block;color:#93a2b3;font-size:13px;margin-bottom:2px}
.cl-item b{color:var(--blue);font-size:16px;word-break:break-all;font-weight:600}

/* ===== 分页 / 空状态 / 404 ===== */
.btn{display:inline-block;padding:10px 26px;background:var(--blue);color:#fff;border-radius:8px;font-size:14px;border:0;cursor:pointer;transition:.25s}
.btn:hover{background:var(--blue-d);color:#fff}
.pager{display:flex;justify-content:center;gap:6px;margin-top:32px;flex-wrap:wrap}
.pager a{display:block;min-width:34px;text-align:center;padding:6px 10px;border:1px solid var(--line);color:var(--ink);border-radius:8px;background:#fff;font-size:14px}
.pager a:hover{border-color:var(--blue);color:var(--blue)}
.pager a.on{background:var(--blue);border-color:var(--blue);color:#fff}
.empty{text-align:center;color:#93a2b3;padding:60px 0;margin:0;grid-column:1 / -1}
.nf404{text-align:center;padding:60px 0}
.n404{margin:0;font-size:88px;font-weight:800;line-height:1;color:#d5e3f5}
.nf404 p:not(.n404){color:#7d92ad;margin:14px 0 0}
.nf404 .btn{margin-top:22px}

/* ===== 响应式 ===== */
@media(max-width:960px){
  nav> .wrap{overflow-x:auto;-webkit-overflow-scrolling:touch}
  nav> .wrap > a,nav .has > a{flex:0 0 auto;white-space:nowrap;padding:0 18px;font-size:15px}
  .grid,.cul,.hon{grid-template-columns:repeat(2,1fr)}
  .about,.contact,.stats{grid-template-columns:1fr}
  .foot{grid-template-columns:1fr 1fr}
  .hero h1{font-size:32px}
  nav{top:0;position:static}
  header{position:static}
  .page2{flex-direction:column}
  .side{width:100%;flex:none}
  .side-cats{display:flex;flex-wrap:wrap;gap:6px}
  .side-cats li{flex:1 1 160px}
  .side-contact{display:none}
  .prod-grid,.case-grid{grid-template-columns:repeat(2,1fr);gap:14px}
  .contact-list{grid-template-columns:1fr}
}
@media(max-width:640px){
  .topbar .wrap{height:auto;padding:6px 20px;flex-wrap:wrap;gap:0 12px;font-size:12px}
  .head-in{height:auto;padding:12px 0;flex-wrap:wrap;gap:10px}
  .logo{min-width:0}
  .logo .txt{min-width:0}
  .logo .txt strong{font-size:17px;letter-spacing:0}
  .logo .txt span{display:none}
  .head-tel{display:none}
  .hero{height:auto;padding:56px 0}
  .hero h1{font-size:26px}
  .hero .chips{margin-top:20px}
  .hero .chips span{font-size:13px;padding:6px 14px}
  .sec-head h2{font-size:24px}
  section{padding:46px 0}
  .page-hero h1{font-size:22px}
}
@media(max-width:520px){
  .prod-grid,.case-grid{grid-template-columns:1fr}
  .dt-img{width:100%;min-width:0}
  .grid,.cul,.hon,.foot{grid-template-columns:1fr}
}