:root{
  --blue:#0051ad;
  --blue-deep:#1962b5;
  --ink:#0d0d0d;
  --gray:#636161;
  --light:#f9fafc;
  --line:#e4e6ea;
  --container:1630px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:"Microsoft YaHei","PingFang SC","Helvetica Neue",Arial,sans-serif;color:var(--ink);background:#fff;line-height:1.6;font-size:15px}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
ul{list-style:none}
.container{max-width:var(--container);margin:0 auto;padding:0 24px}
.center{text-align:center}
.btn{display:inline-block;background:var(--blue);color:#fff;padding:11px 34px;border-radius:30px;font-size:16px;border:1px solid var(--blue);cursor:pointer;transition:.25s}
.btn:hover{background:var(--blue-deep);border-color:var(--blue-deep)}
.btn.outline{background:#fff;color:var(--ink);border-color:#ddd}
.btn.outline:hover{background:var(--blue);border-color:var(--blue);color:#fff}
.empty{text-align:center;color:#999;padding:40px 0}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}

/* ---------- 头部 ---------- */
.head{position:sticky;top:0;z-index:100;background:#fff;box-shadow:0 2px 10px rgba(0,0,0,.06)}
.head-inner{display:flex;align-items:center;justify-content:space-between;height:80px}
.logo a{display:flex;align-items:center;gap:10px;min-width:0}
.logo img{height:56px;width:88px;object-fit:contain;flex:0 0 auto}
.logo span{font-size:18px;font-weight:700;letter-spacing:1px;color:#123d70;white-space:nowrap}
.head-right{display:flex;align-items:center;gap:34px}
.nav>ul{display:flex}
.nav>ul>li{position:relative}
.nav>ul>li>a{display:block;padding:29px 16px;font-size:16px;line-height:22px;color:var(--ink);transition:.2s}
.nav>ul>li>a:hover,.nav>ul>li.active>a{background:var(--blue);color:#fff}
.nav .sub{position:absolute;top:100%;left:0;min-width:150px;background:#fff;box-shadow:0 8px 24px rgba(0,0,0,.12);opacity:0;visibility:hidden;transform:translateY(8px);transition:.2s;z-index:99}
.nav>ul>li:hover .sub{opacity:1;visibility:visible;transform:translateY(0)}
.nav .sub a{display:block;padding:10px 18px;font-size:14px;color:#333}
.nav .sub a:hover{color:var(--blue);background:#f3f7fc}
.tel{display:flex;align-items:center;gap:8px;font-size:20px;letter-spacing:1px;font-weight:600;white-space:nowrap}
.search-btn{display:flex;align-items:center}
.nav-toggle{display:none;background:none;border:0;cursor:pointer;width:42px;height:42px;flex-direction:column;justify-content:center;gap:5px;align-items:center}
.nav-toggle span{width:24px;height:2px;background:#333;display:block}
.mob-nav{display:none}

/* ---------- 首页 Hero ---------- */
.hero-slider{position:relative;height:calc(100vh - 80px);min-height:520px;overflow:hidden}
.hero-slide{position:absolute;inset:0;background-size:cover;background-position:center;opacity:0;transition:opacity .8s;display:flex;align-items:center}
.hero-slide.active{opacity:1}
.hero-slide::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(0,20,60,.55),rgba(0,20,60,.15))}
.hero-txt{position:relative;z-index:2;max-width:var(--container);margin:0 auto;padding:0 24px;width:100%;color:#fff}
.hero-txt h2{font-size:52px;font-weight:700;letter-spacing:3px;text-shadow:0 2px 14px rgba(0,0,0,.35);overflow-wrap:break-word;word-break:break-word;hyphens:auto}
.hero-txt p{font-size:22px;margin:18px 0 30px;letter-spacing:2px;opacity:.95;overflow-wrap:break-word;word-break:break-word}
.hero-prev,.hero-next{position:absolute;top:50%;transform:translateY(-50%);z-index:5;background:rgba(255,255,255,.18);border:0;color:#fff;font-size:36px;width:54px;height:74px;cursor:pointer;border-radius:8px;transition:.2s}
.hero-prev{left:22px}.hero-next{right:22px}
.hero-prev:hover,.hero-next:hover{background:var(--blue)}
.hero-dots{position:absolute;bottom:26px;left:50%;transform:translateX(-50%);display:flex;gap:10px;z-index:5}
.hero-dots i{width:34px;height:4px;border-radius:2px;background:rgba(255,255,255,.45);cursor:pointer;transition:.2s}
.hero-dots i.active{background:#fff}

/* ---------- 区块 ---------- */
.section{padding:84px 0}
.home-about{background:#fff}
.home-about-inner{display:flex;gap:64px;align-items:center}
.home-about-imgs{flex:0 0 46%;display:grid;grid-template-columns:1fr 1fr;gap:14px}
.home-about-imgs img{width:100%;height:280px;object-fit:cover;border-radius:10px}
.home-about-txt .sec-title{margin-bottom:22px}
.home-about-txt p{font-size:16px;line-height:2;color:#444;margin-bottom:28px}
.home-products{background:#fff}
.home-cases{background:var(--light)}
.home-news{background:#fff}
.sec-title{margin-bottom:42px}
.sec-title.center{text-align:center}
.sec-title h2{font-size:34px;font-weight:700;letter-spacing:2px}
.sec-title span{display:block;font-size:14px;letter-spacing:6px;color:var(--blue);text-transform:uppercase;margin-top:8px}
.sec-title h2::after{content:"";display:block;width:48px;height:3px;background:var(--blue);margin:16px 0 0}
.sec-title.center h2::after{margin:16px auto 0}
.cat-icons{display:flex;justify-content:center;gap:70px;margin-bottom:44px;flex-wrap:wrap}
.cat-ico{text-align:center;width:120px}
.cat-ico img{width:88px;height:88px;border-radius:50%;object-fit:cover;border:1px solid #c9d3de;margin:0 auto 12px;transition:.25s}
.cat-ico:hover img{border-color:var(--blue);transform:scale(1.05)}
.cat-ico span{font-size:15px;color:var(--ink)}
.grid{display:grid;gap:26px}
.grid-4{grid-template-columns:repeat(4,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.card{background:#fff;border:1px solid var(--line);border-radius:10px;overflow:hidden;transition:.25s;display:block}
.card:hover{transform:translateY(-6px);box-shadow:0 14px 30px rgba(0,81,173,.12);border-color:transparent}
.card-img{overflow:hidden}
.card-img img{width:100%;height:220px;object-fit:cover;transition:.4s}
.card:hover .card-img img{transform:scale(1.06)}
.card-body{padding:18px 20px 22px}
.card-body h3{font-size:17px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.card:hover .card-body h3{color:var(--blue)}
.card-body p{font-size:13px;color:var(--gray);margin-top:8px;line-height:1.7;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card-body .date{display:inline-block;margin-top:10px;font-size:13px;color:#999}

/* ---------- 内页 ---------- */
.page-banner{position:relative;height:250px;background:linear-gradient(120deg,#0b2c58,#0e4b9b 60%,#0b2c58);display:flex;align-items:center;justify-content:center;overflow:hidden}
.page-banner::before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 75% 30%,rgba(255,255,255,.10),transparent 45%)}
.page-banner-inner{position:relative;z-index:2;text-align:center;color:#fff}
.page-banner-inner h1{font-size:38px;letter-spacing:4px;font-weight:700}
.crumb{font-size:13px;color:#999;padding:16px 24px}
.crumb a{color:#666}
.crumb a:hover{color:var(--blue)}
.page-body{padding-bottom:70px;min-height:360px}
.page-body.narrow{max-width:1080px}

.cat-tabs{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:30px;border-bottom:1px solid var(--line);padding-bottom:14px}
.cat-tabs a{padding:8px 22px;font-size:15px;color:#555;border-radius:20px;background:#f1f4f8}
.cat-tabs a:hover{color:var(--blue)}
.cat-tabs a.active{background:var(--blue);color:#fff}

.news-list{display:flex;flex-direction:column}
.news-item{display:flex;gap:34px;padding:26px 0;border-bottom:1px solid var(--line);align-items:center;transition:.2s}
.news-item:hover{border-color:var(--blue)}
.news-item-img{flex:0 0 240px}
.news-item-img img{width:100%;height:150px;object-fit:cover;border-radius:8px}
.news-item-txt{flex:1}
.news-item-txt h3{font-size:20px;font-weight:600;margin-bottom:8px}
.news-item:hover h3{color:var(--blue)}
.news-item-txt .date{font-size:13px;color:#999}
.news-item-txt p{font-size:14px;color:var(--gray);line-height:1.8;margin-top:10px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-item-txt .more{display:inline-block;margin-top:14px;border:1px solid #333;padding:6px 22px;font-size:13px;color:#555;border-radius:2px;text-transform:uppercase}
.news-item:hover .more{background:var(--blue);border-color:var(--blue);color:#fff}

.pager{display:flex;justify-content:center;gap:6px;margin-top:40px;flex-wrap:wrap}
.pager a{display:inline-block;padding:7px 14px;border:1px solid #cbcbcb;font-size:14px;color:#333;border-radius:4px}
.pager a.current,.pager a:hover{background:var(--blue);border-color:var(--blue);color:#fff}
.pager a.disabled{opacity:.4;pointer-events:none}
.pager .dots{border:0;padding:7px 4px;color:#999}

/* ---------- 详情 ---------- */
.detail-grid{display:flex;gap:48px;margin-top:26px;align-items:flex-start}
.gallery{flex:0 0 46%}
.gallery-main{border:1px solid var(--line);border-radius:10px;overflow:hidden}
.gallery-main img{width:100%;height:420px;object-fit:cover}
.gallery-thumbs{display:flex;gap:10px;margin-top:12px;flex-wrap:wrap}
.gallery-thumbs img{width:76px;height:64px;object-fit:cover;border:2px solid transparent;border-radius:6px;cursor:pointer;opacity:.7}
.gallery-thumbs img.active{border-color:var(--blue);opacity:1}
.detail-info{flex:1;padding-top:8px}
.detail-info h1{font-size:30px;font-weight:700;margin-bottom:14px}
.detail-info .summary{color:var(--gray);font-size:15px;line-height:1.9;margin-bottom:20px}
.specs{border:1px solid var(--line);border-radius:8px;overflow:hidden}
.specs li{display:flex;padding:11px 18px;font-size:14px;border-bottom:1px dashed #e8eaee;color:#555}
.specs li:last-child{border-bottom:0}
.specs li:nth-child(odd){background:#f8fafc}
.specs b{flex:0 0 130px;color:#333;font-weight:600}
.detail-actions{display:flex;gap:16px;margin-top:26px}
.detail-content,.related{margin-top:52px}
.detail-content h2,.related h2{font-size:24px;font-weight:700;margin-bottom:18px;padding-left:14px;border-left:4px solid var(--blue)}
.detail-content p{color:#444;line-height:2;margin-bottom:14px}

.article h1{font-size:28px;font-weight:700;margin:26px 0 12px}
.article-meta{font-size:13px;color:#999;border-bottom:1px dashed #cfcfcf;padding-bottom:16px;margin-bottom:22px;display:flex;gap:26px}
.article-content{color:#3c3c3c;line-height:2;font-size:15px}
.article-content p{margin-bottom:16px}
.article-content img{margin:18px auto;border-radius:8px}
.article-tags{margin-top:26px;font-size:14px;color:#555;border-top:1px solid var(--line);padding-top:16px}
.article-tags a{color:var(--blue)}
.article-pn{margin-top:24px;background:#f6f8fb;border-radius:8px;padding:16px 20px;font-size:14px;color:#555}
.article-pn p{line-height:2}
.article-pn a{color:var(--blue)}

.contact-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:26px}
.cc{background:#f6f8fb;border:1px solid var(--line);border-radius:10px;padding:34px 24px;text-align:center}
.cc b{display:block;font-size:16px;color:#999;font-weight:600;margin-bottom:12px}
.cc span{font-size:18px;color:var(--ink);word-break:break-all}

.form-card{background:#f8fafc;border:1px solid var(--line);border-radius:12px;padding:40px;margin-top:26px}
.form-card h1{font-size:24px;margin-bottom:8px}
.form-card>p{color:#888;margin-bottom:22px}
.form-card form{display:flex;flex-direction:column;gap:16px}
.form-card label{font-size:14px;color:#444}
.form-card input,.form-card textarea,.form-card select{width:100%;margin-top:6px;border:1px solid #d8dce2;border-radius:6px;padding:11px 14px;font-size:15px;font-family:inherit;background:#fff}
.form-card input:focus,.form-card textarea:focus{outline:2px solid rgba(0,81,173,.25);border-color:var(--blue)}
.captcha-line{display:flex;align-items:center;gap:12px}
.captcha-line .captcha-box{display:flex;gap:10px;align-items:center;flex:1}
.captcha-line input{width:120px}
.captcha-box img{width:120px;height:40px;border:1px solid #d8dce2;border-radius:6px;cursor:pointer;background:#eef3f9}
.form-msg{margin-top:6px;font-size:14px}
.form-msg.ok{color:#0a7d3c}
.form-msg.err{color:#c0392b}

.search-form{display:flex;gap:12px;margin:26px 0 30px}
.search-form input{flex:1;border:1px solid #d8dce2;border-radius:30px;padding:12px 22px;font-size:15px}
.search-form input:focus{outline:2px solid rgba(0,81,173,.25)}
.search-list{display:flex;flex-direction:column;gap:14px}
.search-item{display:flex;gap:20px;border:1px solid var(--line);border-radius:10px;padding:16px;transition:.2s;align-items:center}
.search-item:hover{border-color:var(--blue);box-shadow:0 8px 20px rgba(0,81,173,.08)}
.search-item img{width:150px;height:100px;object-fit:cover;border-radius:6px;flex:0 0 150px}
.search-item h3{font-size:17px;margin-bottom:6px}
.search-item:hover h3{color:var(--blue)}
.search-item p{font-size:13px;color:var(--gray);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.search-item span{font-size:12px;color:#999;margin-top:8px;display:inline-block}

.region-cloud{display:flex;gap:16px;flex-wrap:wrap;margin-top:30px}
.region-cloud a{background:#f1f4f8;border-radius:24px;padding:14px 34px;font-size:17px;transition:.2s}
.region-cloud a:hover{background:var(--blue);color:#fff}
.region-txt{margin:24px 0 36px;background:#f6f8fb;border-left:4px solid var(--blue);padding:26px 30px;border-radius:0 10px 10px 0}
.region-txt h1{font-size:24px;margin-bottom:10px}
.region-txt p{color:#555;line-height:1.9}

.sitemap h2{font-size:19px;margin:26px 0 12px;color:var(--blue)}
.sitemap ul{columns:3;gap:18px}
.sitemap li{line-height:2.1;font-size:14px}
.sitemap li a:hover{color:var(--blue)}

.nf{text-align:center;padding:90px 0}
.nf h1{font-size:90px;color:var(--blue);font-weight:800}
.nf p{color:#888;margin:12px 0 30px;font-size:16px}

/* ---------- 资料待补充 ---------- */
.missing-page{max-width:1280px}
.missing-summary{margin:20px 0 38px;display:flex;align-items:center;gap:30px;background:#fff5f4;border:1px solid #f1c2bd;border-left:5px solid #c0392b;border-radius:10px;padding:22px 26px}
.missing-summary>div{display:flex;align-items:baseline;gap:8px;white-space:nowrap;color:#c0392b}
.missing-summary strong{font-size:38px;line-height:1}
.missing-summary span{font-size:18px;font-weight:700}
.missing-summary p{color:#6d4743;line-height:1.8}
.missing-group{margin-bottom:46px}
.missing-group-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:18px;padding-bottom:13px;border-bottom:2px solid #f0d6d3}
.missing-group-head h2{font-size:24px;color:#c0392b}
.missing-group-head p{margin-top:5px;color:#777;font-size:14px}
.missing-group-head>span{color:#c0392b;font-weight:700;white-space:nowrap}
.missing-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}
.missing-card{display:grid;grid-template-columns:210px 1fr;min-height:190px;border:1px solid #ead8d5;border-radius:10px;overflow:hidden;background:#fff;box-shadow:0 5px 18px rgba(80,30,20,.05)}
.missing-shot{background:#f5f6f8;overflow:hidden}
.missing-shot img{width:100%;height:100%;min-height:190px;object-fit:cover;transition:.3s}
.missing-card:hover .missing-shot img{transform:scale(1.03)}
.missing-card-body{padding:18px 20px;display:flex;flex-direction:column;align-items:flex-start}
.missing-status{display:inline-block;color:#c0392b;background:#fff0ee;border-radius:12px;padding:3px 10px;font-size:12px;font-weight:700}
.missing-card h3{color:#c0392b;font-size:17px;margin:10px 0 8px;line-height:1.55}
.missing-card p{font-size:13px;color:#666;line-height:1.75;flex:1}
.missing-view{color:var(--blue);font-size:13px;font-weight:600;margin-top:12px}
.missing-view:hover{text-decoration:underline}
.missing-complete{text-align:center;color:#1e7d3c;font-size:18px;padding:70px 0}

/* ---------- 页脚 ---------- */
.foot{background:#10263f;color:#cfd9e6}
.foot-main{display:flex;gap:30px;padding:60px 24px 50px}
.foot-main dl{flex:1}
.foot-main dl dt{color:#fff;font-size:17px;font-weight:600;margin-bottom:18px;padding-bottom:12px;border-bottom:1px solid rgba(255,255,255,.14)}
.foot-main dl dd{line-height:2.2;font-size:14px}
.foot-main dl dd a:hover{color:#fff}
.foot-main .foot-contact dd{line-height:2}
.foot-main .hotline{font-size:24px;font-weight:700;color:#fff;letter-spacing:1px}
.foot-copy{background:#0b1d31;padding:24px 0}
.foot-copy p{font-size:13px;line-height:2.1;color:#9fb0c4;text-align:center}
.foot-copy a{color:#c6d2e0}
.foot-copy a:hover{color:#fff}
.foot-links{margin-top:4px}
.foot-copy .missing-foot-link{color:#ff7b70;font-weight:700}
.foot-copy .missing-foot-link:hover{color:#fff}
.mob-bar{display:none}

/* ---------- 响应式 ---------- */
@media (max-width:1200px){
  .grid-4{grid-template-columns:repeat(3,1fr)}
  .head-right{gap:18px}
  .tel{font-size:16px}
}
@media (max-width:1020px){
  .head{position:relative}
  .nav,.search-btn{display:none}
  .nav-toggle{display:flex}
  .head-inner{height:66px}
  .logo img{height:46px;width:72px}
  .logo span{font-size:16px}
  .mob-nav{display:none;position:absolute;top:66px;left:0;right:0;background:#fff;box-shadow:0 12px 30px rgba(0,0,0,.12);max-height:calc(100vh - 66px);overflow:auto;z-index:99}
  .mob-nav.open{display:block}
  .mob-nav>ul>li{border-bottom:1px solid var(--line)}
  .mob-nav>ul>li>a{display:block;padding:15px 24px;font-size:16px}
  .mob-nav>ul>li>a:hover{background:var(--blue);color:#fff}
  .mob-nav .sub{display:none;background:#f6f8fb}
  .mob-nav li.open .sub{display:block}
  .mob-nav .sub a{display:block;padding:11px 38px;font-size:14px}
  .mob-hot{padding:14px 24px;font-size:13px;color:#888}
  .mob-hot a{color:var(--blue);margin-right:12px}
  .hero-slider{height:62vh;min-height:420px}
  .hero-txt h2{font-size:34px}
  .hero-txt p{font-size:17px}
  .home-about-inner{flex-direction:column;gap:34px}
  .home-about-imgs{flex:auto;width:100%}
  .section{padding:56px 0}
  .detail-grid{flex-direction:column}
  .gallery{flex:auto;width:100%}
  .contact-cards{grid-template-columns:1fr}
  .missing-grid{grid-template-columns:1fr}
}
@media (max-width:760px){
  .tel{display:none}
  .grid-4,.grid-3{grid-template-columns:repeat(2,1fr)}
  .container{padding:0 16px}
  .page-banner{height:170px}
  .page-banner-inner h1{font-size:26px}
  .news-item{flex-direction:column;gap:14px}
  .news-item-img{flex:auto;width:100%}
  .news-item-img img{height:190px}
  .sec-title h2{font-size:26px}
  .hero-prev,.hero-next{display:none}
  /* 移动端/窄屏：英文长标题需缩小并允许折行 */
  .hero-txt h2{font-size:30px;letter-spacing:1px;line-height:1.3;word-break:break-word}
  .hero-txt p{font-size:16px;letter-spacing:1px;line-height:1.5;word-break:break-word}
  .hero-txt{padding:0 20px}
  .foot-main{flex-wrap:wrap;padding:40px 16px}
  .foot-main dl{flex:0 0 46%}
  .foot-main .foot-contact{flex:0 0 100%}
  .form-card{padding:24px 18px}
  .gallery-main img{height:280px}
  .detail-actions{flex-wrap:wrap}
  .sitemap ul{columns:2}
  .missing-summary{align-items:flex-start;flex-direction:column;gap:12px}
  .missing-card{grid-template-columns:150px 1fr}
  .mob-bar{display:flex;position:fixed;bottom:0;left:0;right:0;background:#fff;border-top:1px solid var(--line);z-index:100;height:58px}
  .mob-bar a{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;font-size:11px;color:#555;gap:2px}
  .mob-bar .ic{font-size:19px;color:var(--blue)}
  body{padding-bottom:58px}
}
@media (max-width:480px){
  .logo a{gap:6px}
  .logo img{height:42px;width:65px}
  .logo span{max-width:180px;overflow:hidden;text-overflow:ellipsis;font-size:14px}
  .grid-4,.grid-3{grid-template-columns:1fr}
  .cat-icons{gap:24px}
  /* 英文标题较长，小屏需缩小字号并允许折行，避免右侧被裁切 */
  .hero-txt h2{font-size:22px;letter-spacing:0;line-height:1.32;word-break:break-word}
  .hero-txt p{font-size:14px;letter-spacing:0;line-height:1.5;word-break:break-word}
  .hero-txt{padding:0 18px}
  .missing-card{grid-template-columns:1fr}
  .missing-shot img{height:180px;min-height:0}
}
/* 中英文切换 */
.lang-toggle{display:flex;align-items:center;gap:5px;padding:3px 7px;border:1px solid #dfe6ee;border-radius:5px;background:#f7f9fc;white-space:nowrap}
.lang-toggle button{border:0;background:transparent;padding:3px 4px;color:#687789;font:600 12px/1.2 inherit;cursor:pointer}
.lang-toggle button.on{color:#0051ad;font-weight:800}
.lang-toggle span{color:#aab4bf;font-size:11px}
.mob-lang{display:none;padding:12px 18px 2px}
html[data-site-lang="en"] .i18n-zh,html[data-site-lang="zh"] .i18n-en{display:none!important}
html[data-site-lang="en"] .i18n-en,html[data-site-lang="zh"] .i18n-zh{display:block}
span.i18n-html{display:inline}
@media(max-width:900px){.head-right>.lang-toggle{display:none}.mob-lang{display:flex;justify-content:flex-end}.mob-lang .lang-toggle{display:flex}}