:root{
  --bg:#0F1115;--bg2:#161922;--card:#1C2030;--line:#2A2F42;
  --orange:#FF6B35;--orange2:#FF8C5A;--text:#E8EAF0;--text2:#9CA3B8;
  --white:#fff;
}
*{margin:0;padding:0;box-sizing:border-box;}
body{font-family:'Microsoft YaHei','PingFang SC',sans-serif;background:var(--bg);color:var(--text);line-height:1.6;}
a{color:inherit;text-decoration:none;}
img{max-width:100%;display:block;}
.container{max-width:1240px;margin:0 auto;padding:0 24px;}

/* 顶栏 */
.topbar{background:#0A0B0E;font-size:13px;color:var(--text2);padding:8px 0;border-bottom:1px solid var(--line);}
.topbar .container{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:8px;}
.topbar .right{display:flex;gap:20px;}
.topbar .right span{display:flex;align-items:center;gap:6px;}
.topbar svg{width:14px;height:14px;fill:var(--orange);}

/* 导航 */
.nav{background:var(--bg);position:sticky;top:0;z-index:100;border-bottom:1px solid var(--line);}
.nav .container{display:flex;align-items:center;height:72px;gap:40px;}
.logo{font-size:22px;font-weight:900;letter-spacing:1px;}
.logo a{color:var(--white);}
.logo span{color:var(--orange);}
.nav ul{display:flex;list-style:none;gap:4px;flex:1;flex-wrap:wrap;}
.nav ul a{padding:10px 16px;font-size:15px;color:var(--text2);border-radius:6px;transition:all .2s;}
.nav ul a:hover,.nav ul a.active{color:var(--white);background:rgba(255,107,53,.1);}
.nav-cta{background:var(--orange);color:#fff;padding:10px 24px;border-radius:6px;font-size:14px;font-weight:700;white-space:nowrap;}
.nav-toggle{display:none;background:none;border:none;color:var(--text);font-size:24px;cursor:pointer;}

/* Hero */
.hero{padding:80px 0 100px;position:relative;overflow:hidden;}
.hero::before{content:'';position:absolute;top:0;right:0;width:60%;height:100%;background:radial-gradient(ellipse at right,rgba(255,107,53,.08),transparent 60%);pointer-events:none;}
.hero-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:60px;align-items:center;}
.hero-tag{display:inline-block;padding:6px 16px;background:rgba(255,107,53,.12);color:var(--orange);border-radius:4px;font-size:13px;margin-bottom:24px;}
.hero h1{font-size:52px;font-weight:900;line-height:1.15;margin-bottom:24px;letter-spacing:-1px;}
.hero h1 em{font-style:normal;color:var(--orange);}
.hero p.lead{font-size:17px;color:var(--text2);line-height:1.8;margin-bottom:36px;max-width:520px;}
.hero-btns{display:flex;gap:16px;align-items:center;flex-wrap:wrap;}
.btn{padding:14px 32px;border-radius:6px;font-size:15px;font-weight:700;display:inline-block;}
.btn-orange{background:var(--orange);color:#fff;}
.btn-line{border:1px solid var(--line);color:var(--text);}
.hero-phone{margin-left:20px;font-size:22px;font-weight:900;}
.hero-phone small{display:block;font-size:12px;color:var(--text2);font-weight:400;}
.hero-side{display:grid;grid-template-columns:1fr 1fr;gap:16px;}
.hero-card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:24px;}
.hero-card .num{font-size:32px;font-weight:900;color:var(--orange);margin-bottom:4px;}
.hero-card .label{font-size:13px;color:var(--text2);}

/* 优势条 */
.advantages{padding:40px 0;background:#0A0B0E;border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.adv-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;}
.adv-item{display:flex;gap:14px;align-items:flex-start;}
.adv-icon{width:44px;height:44px;background:rgba(255,107,53,.12);border-radius:8px;display:flex;align-items:center;justify-content:center;flex-shrink:0;}
.adv-icon svg{width:22px;height:22px;fill:var(--orange);}
.adv-item h4{font-size:15px;font-weight:700;margin-bottom:4px;}
.adv-item p{font-size:13px;color:var(--text2);}

/* 通用section */
section{padding:80px 0;}
.sec-head{margin-bottom:48px;display:flex;justify-content:space-between;align-items:flex-end;flex-wrap:wrap;gap:16px;}
.sec-head h2{font-size:36px;font-weight:900;letter-spacing:-.5px;}
.sec-head h2 span{color:var(--orange);}
.sec-head p{color:var(--text2);margin-top:8px;font-size:15px;}
.sec-head .more{font-size:14px;color:var(--text2);border-bottom:1px solid var(--line);padding-bottom:2px;}

/* 产品 */
.products{background:var(--bg2);}
.prod-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.prod-card{background:var(--card);border:1px solid var(--line);border-radius:12px;overflow:hidden;transition:all .25s;}
.prod-card:hover{border-color:var(--orange);transform:translateY(-4px);}
.prod-img{height:220px;background:linear-gradient(135deg,#252a3d,#1a1d2b);overflow:hidden;}
.prod-img img{width:100%;height:100%;object-fit:cover;}
.prod-body{padding:24px;}
.prod-body h3{font-size:19px;font-weight:700;margin-bottom:10px;}
.prod-body p{font-size:14px;color:var(--text2);line-height:1.7;margin-bottom:16px;}
.prod-link{font-size:14px;color:var(--orange);font-weight:600;}

/* 案例 */
.case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.case-card{border-radius:12px;overflow:hidden;position:relative;height:280px;}
.case-img{position:absolute;inset:0;background:linear-gradient(135deg,#252a3d,#1a1d2b);overflow:hidden;}
.case-img img{width:100%;height:100%;object-fit:cover;}
.case-overlay{position:absolute;bottom:0;left:0;right:0;padding:24px;background:linear-gradient(transparent,rgba(0,0,0,.85));}
.case-overlay h4{font-size:17px;font-weight:700;}
.case-overlay p{font-size:13px;color:var(--text2);margin-top:4px;}

/* FAQ */
.faq{background:var(--bg2);}
.faq-wrap{display:grid;grid-template-columns:1fr 1fr;gap:16px;}
.faq-item{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:24px;}
.faq-q{font-size:16px;font-weight:700;margin-bottom:12px;display:flex;gap:10px;}
.faq-q::before{content:'Q';flex-shrink:0;width:24px;height:24px;background:var(--orange);color:#fff;border-radius:4px;display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:900;}
.faq-a{font-size:14px;color:var(--text2);line-height:1.8;padding-left:34px;}

/* CTA条 */
.cta{background:linear-gradient(135deg,var(--orange),#E85A28);padding:48px 0;}
.cta .container{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:20px;}
.cta h3{font-size:26px;font-weight:900;color:#fff;}
.cta p{color:rgba(255,255,255,.85);margin-top:6px;}
.cta .btn{background:#fff;color:var(--orange);}

/* 城市 */
.cities .city-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:8px;}
.cities a{padding:12px 8px;text-align:center;font-size:14px;color:var(--text2);background:var(--card);border:1px solid var(--line);border-radius:6px;transition:all .15s;}
.cities a:hover{color:var(--orange);border-color:var(--orange);}

/* 页面banner */
.page-banner{padding:60px 0;background:var(--bg2);border-bottom:1px solid var(--line);}
.page-banner h1{font-size:36px;font-weight:900;}
.page-banner .breadcrumb{font-size:14px;color:var(--text2);margin-top:8px;}
.page-banner .breadcrumb a{color:var(--text2);}
.page-banner .breadcrumb a:hover{color:var(--orange);}

/* 列表页 */
.list-page{padding:60px 0;}
.sub-cats{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:32px;}
.sub-cats a{padding:8px 18px;background:var(--card);border:1px solid var(--line);border-radius:6px;font-size:14px;color:var(--text2);}
.sub-cats a.active,.sub-cats a:hover{background:rgba(255,107,53,.12);color:var(--orange);border-color:var(--orange);}
.product-list-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.product-item{background:var(--card);border:1px solid var(--line);border-radius:12px;overflow:hidden;transition:all .2s;}
.product-item:hover{border-color:var(--orange);transform:translateY(-4px);}
.pi-img{height:200px;background:var(--bg2);overflow:hidden;}
.pi-img img{width:100%;height:100%;object-fit:cover;}
.pi-body{padding:20px;}
.pi-body h3{font-size:17px;font-weight:700;color:var(--white);margin-bottom:8px;}
.pi-desc{font-size:14px;color:var(--text2);line-height:1.6;margin-bottom:12px;}
.pi-more{font-size:13px;color:var(--orange);}

/* 分页 */
.pagination{margin-top:40px;text-align:center;}
.pagination ul{list-style:none;display:inline-flex;gap:6px;justify-content:center;flex-wrap:wrap;}
.pagination li{display:inline-block;}
.pagination a,.pagination span{display:inline-block;padding:8px 14px;border:1px solid var(--line);border-radius:6px;font-size:14px;color:var(--text2);background:var(--card);}
.pagination a:hover{background:rgba(255,107,53,.12);color:var(--orange);border-color:var(--orange);}
.pagination .active span,.pagination .current span{background:var(--orange);color:#fff;border-color:var(--orange);}

/* 内容页 */
.view-page{padding:60px 0;}
.view-meta{display:flex;gap:20px;font-size:13px;color:var(--text2);margin-bottom:24px;padding-bottom:16px;border-bottom:1px solid var(--line);}
.view-content{font-size:15px;line-height:1.9;color:var(--text);}
.view-content img{max-width:100%;border-radius:8px;margin:16px 0;}
.view-contact-bar{margin-top:48px;padding:32px;background:linear-gradient(135deg,var(--orange),#E85A28);border-radius:12px;color:#fff;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:16px;}
.view-contact-bar p{font-size:18px;}
.view-contact-bar strong{font-size:24px;}

/* 产品详情 */
.product-detail{display:grid;grid-template-columns:1fr 1.2fr;gap:40px;margin-bottom:48px;}
.pd-img img{width:100%;border-radius:12px;}
.pd-right h2{font-size:28px;font-weight:900;color:var(--white);margin-bottom:12px;}
.pd-meta{display:flex;gap:20px;font-size:13px;color:var(--text2);margin-bottom:16px;}
.pd-summary{font-size:15px;color:var(--text2);line-height:1.8;margin-bottom:24px;}
.pd-contact{display:flex;align-items:center;gap:12px;flex-wrap:wrap;}
.pd-contact p{font-size:16px;margin-right:10px;}
.pd-contact strong{color:var(--orange);font-size:22px;}
.related-box{margin-top:48px;padding-top:32px;border-top:1px solid var(--line);}
.related-title{font-size:22px;font-weight:900;color:var(--white);margin-bottom:20px;}
.related-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;}
.related-item img{height:120px;object-fit:cover;border-radius:8px;margin-bottom:8px;}
.related-item p{font-size:13px;text-align:center;color:var(--text2);}

/* 新闻列表 */
.news-layout{display:grid;grid-template-columns:1fr 320px;gap:32px;}
.news-main{min-width:0;}
.news-list{display:flex;flex-direction:column;gap:20px;}
.news-item{background:var(--card);border-radius:12px;overflow:hidden;border:1px solid var(--line);}
.ni-link{display:grid;grid-template-columns:240px 1fr;}
.ni-img{height:160px;background:var(--bg2);overflow:hidden;}
.ni-img img{width:100%;height:100%;object-fit:cover;}
.ni-body{padding:20px 24px;}
.ni-title{font-size:17px;font-weight:700;color:var(--white);margin-bottom:8px;}
.ni-desc{font-size:14px;color:var(--text2);margin-bottom:12px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.ni-meta{display:flex;gap:16px;font-size:13px;color:var(--text2);}

/* 侧边栏 */
.news-side{display:flex;flex-direction:column;gap:24px;}
.side-box{background:var(--card);border-radius:12px;padding:20px;border:1px solid var(--line);}
.side-title{font-size:16px;font-weight:900;color:var(--white);margin-bottom:16px;padding-bottom:12px;border-bottom:2px solid var(--orange);}
.side-list{list-style:none;}
.side-list li{padding:8px 0;border-bottom:1px dashed var(--line);}
.side-list li a{display:flex;align-items:center;gap:10px;font-size:14px;color:var(--text2);}
.sl-num{display:inline-block;width:20px;height:20px;line-height:20px;text-align:center;background:var(--bg2);color:var(--text2);font-size:12px;border-radius:4px;}
.side-list li:nth-child(1) .sl-num,.side-list li:nth-child(2) .sl-num,.side-list li:nth-child(3) .sl-num{background:var(--orange);color:#fff;}
.sl-title{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.side-contact{background:linear-gradient(135deg,var(--orange),#E85A28);border-radius:12px;padding:24px;color:#fff;text-align:center;}
.side-contact h4{font-size:18px;font-weight:900;margin-bottom:8px;}
.side-contact p{font-size:13px;color:rgba(255,255,255,.8);margin-bottom:16px;}
.sc-phone{font-size:22px;font-weight:900;margin-bottom:16px;}
.btn-block{display:block;text-align:center;}

/* 底部 */
.footer{background:#0A0B0E;padding:60px 0 24px;border-top:1px solid var(--line);}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px;margin-bottom:40px;}
.footer h5{font-size:15px;font-weight:700;margin-bottom:18px;color:var(--white);}
.footer p,.footer li{font-size:14px;color:var(--text2);line-height:2;list-style:none;}
.foot-bottom{border-top:1px solid var(--line);padding-top:20px;text-align:center;font-size:13px;color:#555c70;}

/* 悬浮电话 */
.float-call{position:fixed;right:24px;bottom:30px;background:var(--orange);width:56px;height:56px;border-radius:50%;display:flex;align-items:center;justify-content:center;box-shadow:0 8px 24px rgba(255,107,53,.4);cursor:pointer;z-index:99;}
.float-call svg{width:26px;height:26px;fill:#fff;}

/* 响应式 */
@media (max-width:900px){
  .hero-grid{grid-template-columns:1fr;gap:40px;}
  .hero h1{font-size:36px;}
  .prod-grid,.case-grid,.product-list-grid{grid-template-columns:1fr;}
  .faq-wrap{grid-template-columns:1fr;}
  .adv-grid{grid-template-columns:repeat(2,1fr);}
  .cities .city-grid{grid-template-columns:repeat(3,1fr);}
  .foot-grid{grid-template-columns:1fr;gap:24px;}
  .news-layout{grid-template-columns:1fr;}
  .ni-link{grid-template-columns:1fr;}
  .related-grid{grid-template-columns:repeat(2,1fr);}
  .product-detail{grid-template-columns:1fr;}
  .nav ul{display:none;position:absolute;top:72px;left:0;right:0;background:var(--bg);flex-direction:column;padding:12px 24px;border-bottom:1px solid var(--line);}
  .nav ul.open{display:flex;}
  .nav-toggle{display:block;margin-left:auto;}
  .nav-cta{display:none;}
}