@charset "utf-8";
/* ==========================================================
   南京吉鑫环境科技有限公司 — 洁净天蓝风格 (Clean Sky Blue)
   纯静态 / 响应式 / 无依赖
   ========================================================== */

:root{
  --blue:#1890ff;
  --blue-deep:#0b5fa5;
  --blue-dark:#0a4f8a;
  --cyan:#00b8d4;
  --sky:#e8f4ff;
  --sky-soft:#f5f9fd;
  --sky-deep:#d6ecff;
  --line:#d6e9fb;
  --line-soft:#eaf3fb;
  --ink:#12303f;
  --text:#4a5a68;
  --muted:#8195a3;
  --white:#fff;
  --radius:10px;
  --radius-lg:16px;
  --shadow:0 2px 10px rgba(24,144,255,.08);
  --shadow-hover:0 10px 28px rgba(24,144,255,.18);
  --wrap:1180px;
}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--sky-soft);
  color:var(--text);
  font-family:"Microsoft YaHei","PingFang SC","Hiragino Sans GB","Helvetica Neue",Arial,sans-serif;
  font-size:15px;
  line-height:1.9;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;border:0;vertical-align:middle}
a{color:var(--blue-deep);text-decoration:none;transition:color .2s}
a:hover{color:var(--blue)}
p{margin:0 0 1em}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 16px}
.mobile-only{display:none}

/* ---------------- 顶部细条 ---------------- */
.topbar{
  background:linear-gradient(90deg,var(--blue-deep),var(--blue));
  color:#fff;font-size:13px;letter-spacing:.2px;
}
.topbar .wrap{display:flex;align-items:center;justify-content:space-between;min-height:34px;gap:12px}
.topbar .tb-text{opacity:.95;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.topbar .tb-tel{font-weight:700;white-space:nowrap}
.topbar .tb-tel b{font-size:15px}

/* ---------------- 页头 ---------------- */
.header{background:var(--white);border-bottom:1px solid var(--line-soft)}
.header .wrap{
  display:flex;align-items:center;justify-content:space-between;
  gap:20px;padding-top:16px;padding-bottom:16px;flex-wrap:wrap;
}
.brand{display:flex;align-items:center;gap:14px;min-width:0}
.brand img.logo{max-height:62px;width:auto}
.brand .brand-txt .name{
  font-size:20px;font-weight:700;color:var(--blue-deep);letter-spacing:1px;line-height:1.3;
}
.brand .brand-txt .slogan{font-size:12.5px;color:var(--muted);letter-spacing:.5px}
.header .side-img{display:flex;align-items:center;gap:14px}
.header .side-img img{max-height:80px;width:auto}
.hotline{
  display:flex;align-items:center;gap:8px;
  background:linear-gradient(135deg,#e23c3c,#b91f1f);
  color:#fff;border-radius:999px;padding:8px 18px;font-weight:700;font-size:15px;
  box-shadow:0 4px 14px rgba(185,31,31,.28);white-space:nowrap;
}
.hotline small{display:block;font-size:11px;font-weight:400;opacity:.9;letter-spacing:1px}

/* ---------------- 导航 ---------------- */
.nav{background:linear-gradient(90deg,var(--blue-deep) 0%,var(--blue) 55%,var(--cyan) 100%);position:relative;z-index:60}
.nav .wrap{display:flex;align-items:center;min-height:48px}
.nav ul{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap}
.nav li{margin:0}
.nav a{
  display:block;padding:0 18px;line-height:48px;color:#fff;font-size:15.5px;font-weight:500;
  position:relative;transition:background .2s;
}
.nav a::after{
  content:"";position:absolute;left:50%;right:50%;bottom:8px;height:2px;background:#fff;
  transition:left .25s,right .25s;border-radius:2px;
}
.nav a:hover{background:rgba(255,255,255,.14)}
.nav a:hover::after,.nav a.active::after{left:18px;right:18px}
.nav a.hot{color:#ffe58f}
.nav-burger{
  display:none;margin-left:auto;width:44px;height:44px;border:0;background:transparent;cursor:pointer;
  padding:10px;
}
.nav-burger span{display:block;height:2px;background:#fff;margin:5px 0;border-radius:2px;transition:.25s}

/* ---------------- Banner ---------------- */
.banner{position:relative;background:var(--blue-deep);overflow:hidden}
.banner img{display:block;width:100%;height:auto;aspect-ratio:1920/488;object-fit:cover}
.banner .cap{
  position:absolute;left:0;right:0;bottom:0;padding:26px 0;
  background:linear-gradient(to top,rgba(6,60,105,.88),rgba(6,60,105,0));
  color:#fff;
}
.banner .cap h1,.banner .cap .t{margin:0;font-size:26px;font-weight:700;letter-spacing:1px;text-shadow:0 2px 8px rgba(0,0,0,.3)}
.banner .cap p{margin:6px 0 0;font-size:14px;opacity:.92}

/* ---------------- 主体布局 ---------------- */
.main{padding:22px 0 10px}
.layout{display:grid;grid-template-columns:264px 1fr;gap:20px;align-items:start}

/* 卡片 */
.card{
  background:var(--white);border:1px solid var(--line-soft);border-radius:var(--radius-lg);
  box-shadow:var(--shadow);overflow:hidden;
}
.card-hd{
  display:flex;align-items:center;gap:8px;
  background:linear-gradient(90deg,var(--sky),#fff);
  border-bottom:1px solid var(--line);
  padding:11px 16px;font-size:16px;font-weight:700;color:var(--blue-deep);
}
.card-hd .en{font-size:12px;color:var(--muted);font-weight:400;letter-spacing:1px}
h1.card-hd{margin:0;font-size:16px;font-weight:700}
.card-bd{padding:16px}

/* 侧栏产品分类 */
.side-group{margin-bottom:6px}
.side-group > a.g-title{
  display:flex;align-items:center;gap:8px;padding:9px 14px;border-radius:8px;
  font-weight:700;color:var(--blue-deep);background:var(--sky-soft);margin-bottom:2px;
  border-left:3px solid var(--blue);
}
.side-group > a.g-title:hover{background:var(--sky);color:var(--blue)}
.side-group > a.g-title::before{
  content:"";width:6px;height:6px;border-radius:50%;background:var(--blue);flex:0 0 auto;
}
.side-group ul{list-style:none;margin:0 0 10px;padding:0 0 0 10px}
.side-group li a{
  display:block;padding:7px 12px 7px 20px;color:var(--text);font-size:14px;position:relative;
  border-radius:6px;
}
.side-group li a::before{
  content:"";position:absolute;left:8px;top:50%;margin-top:-2px;
  width:5px;height:5px;border-radius:50%;background:var(--line);transition:.2s;
}
.side-group li a:hover{background:var(--sky-soft);color:var(--blue)}
.side-group li a:hover::before{background:var(--blue)}
.side-group li a.on{color:var(--blue);font-weight:700;background:var(--sky-soft)}
.side-group li a.on::before{background:var(--blue)}

/* 侧栏热门文章 */
.hot-list{list-style:none;margin:0;padding:0}
.hot-list li{border-bottom:1px dashed var(--line-soft)}
.hot-list li:last-child{border-bottom:0}
.hot-list a{
  display:block;padding:9px 2px 9px 16px;font-size:14px;color:var(--text);position:relative;
  overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
}
.hot-list a::before{
  content:"";position:absolute;left:0;top:50%;margin-top:-3px;
  width:6px;height:6px;border-radius:2px;background:var(--cyan);
}
.hot-list a:hover{color:var(--blue)}

/* ---------------- 内容区 ---------------- */
.crumb{
  display:flex;align-items:center;flex-wrap:wrap;gap:6px;
  font-size:13px;color:var(--muted);margin-bottom:14px;
  padding-bottom:12px;border-bottom:1px solid var(--line-soft);
}
.crumb a{color:var(--muted)}
.crumb a:hover{color:var(--blue)}
.crumb .sep{color:var(--line)}
.crumb .cur{color:var(--blue-deep);font-weight:700}
.crumb .tel{
  margin-left:8px;padding:2px 10px;border-radius:999px;
  background:var(--sky);color:var(--blue-deep);font-weight:700;font-size:12.5px;
}

.article{padding:20px 22px 26px;font-size:15.5px;line-height:2}
.article h1{
  font-size:24px;color:var(--blue-deep);margin:0 0 18px;padding-bottom:12px;
  border-bottom:2px solid var(--sky);line-height:1.5;
}
.article h2{font-size:19px;color:var(--blue-deep);margin:1.4em 0 .6em}
.article h3{font-size:16.5px;color:var(--ink);margin:1.2em 0 .5em}
.article strong,.article b{color:var(--blue-deep);font-weight:700}
.article img{
  display:block;max-width:100%;height:auto;margin:14px auto;border-radius:var(--radius);
  box-shadow:0 2px 12px rgba(24,144,255,.14);cursor:zoom-in;background:#fff;
}
.article img.align-right{float:right;margin:6px 0 14px 20px;max-width:48%}
.article img.align-left{float:left;margin:6px 20px 14px 0;max-width:48%}
.article .clear{clear:both}
.article p{margin:0 0 .9em;text-align:justify;word-break:break-word}
.article ul,.article ol{margin:.4em 0 1em;padding-left:1.5em}
.article li{margin:.25em 0}
.article a{color:var(--blue-deep);border-bottom:1px dotted var(--line)}
.article a:hover{color:var(--blue);border-bottom-color:var(--blue)}
.article .hl{color:#e54545;font-weight:700}

/* 参数数据表 */
.data-table{overflow-x:auto;margin:18px 0;-webkit-overflow-scrolling:touch}
.data-table table{border-collapse:collapse;width:100%;min-width:520px;font-size:14px}
.data-table td{border:1px solid var(--line);padding:8px 10px;text-align:center;line-height:1.7}
.data-table tr:first-child td{
  background:var(--sky);color:var(--blue-deep);font-weight:700;white-space:nowrap;
}
.data-table tr:nth-child(n+2):hover td{background:var(--sky-soft)}

/* ---------------- 产品网格 ---------------- */
.product-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:6px}
.product-card{
  background:#fff;border:1px solid var(--line-soft);border-radius:var(--radius);
  overflow:hidden;text-align:center;transition:.25s;display:block;
}
.product-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:var(--line)}
.product-card .thumb{
  height:190px;display:flex;align-items:center;justify-content:center;
  background:linear-gradient(180deg,#fff,var(--sky-soft));overflow:hidden;
}
.product-card .thumb img{max-height:100%;width:auto;object-fit:contain;transition:.3s}
.product-card:hover .thumb img{transform:scale(1.05)}
.product-card .tt{
  padding:12px 10px;font-size:15px;font-weight:700;color:var(--ink);
  border-top:1px solid var(--line-soft);
}
.product-card:hover .tt{color:var(--blue)}

/* ---------------- 新闻列表 ---------------- */
.news-list{list-style:none;margin:0;padding:0}
.news-list li{border-bottom:1px dashed var(--line-soft)}
.news-list li:last-child{border-bottom:0}
.news-list a{
  display:flex;align-items:center;gap:10px;padding:12px 6px;font-size:15.5px;color:var(--text);
  transition:.2s;border-radius:6px;
}
.news-list a:hover{background:var(--sky-soft);color:var(--blue);padding-left:12px}
.news-list .dot{flex:0 0 auto;width:7px;height:7px;border-radius:50%;background:var(--blue)}
.news-list .txt{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.news-list .arrow{flex:0 0 auto;color:var(--line);font-size:13px}

/* ---------------- 说明书阅读器 ---------------- */
.reader{max-width:900px;margin:0 auto;padding:0 0 30px}
.reader-bar{
  display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;
}
.reader-bar .pos{font-size:15px;color:var(--blue-deep);font-weight:700}
.reader-bar .pos b{color:var(--blue);font-size:18px}
.reader-stage{
  background:#fff;border:1px solid var(--line-soft);border-radius:var(--radius-lg);
  box-shadow:var(--shadow);padding:10px;text-align:center;min-height:220px;
  display:flex;align-items:center;justify-content:center;
}
.reader-stage img{max-width:100%;height:auto;border-radius:8px;cursor:zoom-in}
.reader-miss{
  width:100%;padding:70px 20px;text-align:center;color:var(--muted);
  background:repeating-linear-gradient(45deg,var(--sky-soft),var(--sky-soft) 12px,#fff 12px,#fff 24px);
  border-radius:8px;font-size:15px;line-height:2;
}
.reader-miss .ico{font-size:34px;display:block;margin-bottom:10px;opacity:.5}
.reader-nav{display:flex;align-items:center;gap:10px;margin:16px 0;flex-wrap:wrap}
.reader-nav a.btn{
  padding:9px 20px;border-radius:999px;background:var(--blue);color:#fff;font-size:14.5px;
  box-shadow:0 3px 10px rgba(24,144,255,.25);transition:.2s;
}
.reader-nav a.btn:hover{background:var(--blue-deep);transform:translateY(-1px)}
.reader-nav a.btn.ghost{background:#fff;color:var(--blue-deep);border:1px solid var(--line);box-shadow:none}
.reader-nav a.btn.ghost:hover{background:var(--sky);border-color:var(--blue)}
.reader-nav a.btn.disabled{background:#cfd8e0;color:#fff;box-shadow:none;pointer-events:none}
.pager{display:flex;flex-wrap:wrap;gap:6px;justify-content:center;margin-top:6px}
.pager a{
  min-width:34px;height:34px;line-height:32px;text-align:center;border-radius:8px;
  border:1px solid var(--line);background:#fff;font-size:14px;color:var(--text);
}
.pager a:hover{border-color:var(--blue);color:var(--blue);background:var(--sky-soft)}
.pager a.on{background:var(--blue);border-color:var(--blue);color:#fff;font-weight:700}
.reader-back{text-align:center;margin-top:18px;font-size:14px;color:var(--muted)}
.reader-back a{color:var(--blue-deep)}

/* ---------------- 页脚 ---------------- */
.footer{
  margin-top:26px;background:linear-gradient(135deg,var(--blue-dark),var(--blue-deep) 60%,var(--blue));
  color:#dbeafe;font-size:14px;
}
.footer .wrap{padding:26px 16px}
.footer .f-cols{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:24px}
.footer h4{color:#fff;font-size:16px;margin:0 0 10px;font-weight:700}
.footer p{margin:0 0 6px;line-height:2}
.footer .f-brand .name{font-size:18px;color:#fff;font-weight:700;margin-bottom:8px}
.footer a{color:#dbeafe}
.footer a:hover{color:#fff;text-decoration:underline}
.footer .f-bottom{
  margin-top:20px;padding-top:14px;border-top:1px solid rgba(255,255,255,.18);
  text-align:center;font-size:13px;color:#bfdbfe;
}
.footer .f-bottom a{color:#bfdbfe}

/* ---------------- 移动端底部条 ---------------- */
.tabbar{
  position:fixed;left:0;right:0;bottom:0;z-index:80;display:none;
  background:#fff;border-top:1px solid var(--line);box-shadow:0 -2px 14px rgba(24,144,255,.12);
}
.tabbar a{
  flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;
  height:54px;font-size:12px;color:var(--text);gap:2px;
}
.tabbar a .ic{font-size:18px;line-height:1}
.tabbar a.tel{background:var(--blue);color:#fff}
.tabbar a.tel:hover{color:#fff}

/* ---------------- 图片灯箱 ---------------- */
.lightbox{
  position:fixed;inset:0;z-index:200;background:rgba(8,32,52,.9);
  display:none;align-items:center;justify-content:center;padding:20px;cursor:zoom-out;
}
.lightbox.on{display:flex}
.lightbox img{max-width:100%;max-height:100%;border-radius:6px;box-shadow:0 10px 40px rgba(0,0,0,.5)}
.lightbox .lb-close{
  position:absolute;top:16px;right:20px;color:#fff;font-size:30px;line-height:1;cursor:pointer;opacity:.8;
}

/* ---------------- 响应式 ---------------- */
@media (max-width:1024px){
  .layout{grid-template-columns:230px 1fr}
  .product-grid{grid-template-columns:repeat(2,1fr)}
  .nav a{padding:0 13px;font-size:15px}
}
@media (max-width:860px){
  body{padding-bottom:56px}
  .nav-burger{display:block}
  .nav ul{
    display:none;position:absolute;left:0;right:0;top:100%;
    background:var(--blue-deep);flex-direction:column;box-shadow:0 8px 20px rgba(0,0,0,.18);
  }
  .nav ul.open{display:flex}
  .nav ul li{width:100%}
  .nav a{line-height:44px;border-top:1px solid rgba(255,255,255,.12)}
  .nav a::after{display:none}
  .nav a.active{background:rgba(255,255,255,.16)}
  .layout{grid-template-columns:1fr}
  .sidebar{order:2}
  .header .wrap{padding-top:12px;padding-bottom:12px}
  .brand img.logo{max-height:46px}
  .hotline{padding:6px 14px;font-size:14px}
  .banner .cap{padding:14px 0}
  .banner .cap h1,.banner .cap .t{font-size:19px}
  .banner .cap p{font-size:12.5px}
  .article{padding:16px 15px 20px;font-size:15px}
  .article h1{font-size:20px}
  .article img.align-right,.article img.align-left{float:none;max-width:100%;margin:12px auto}
  .topbar .tb-text{font-size:12px}
  .footer .f-cols{grid-template-columns:1fr;gap:14px}
  .tabbar{display:flex}
  .mobile-only{display:block}
}
@media (max-width:520px){
  .product-grid{grid-template-columns:repeat(2,1fr);gap:10px}
  .product-card .thumb{height:130px}
  .product-card .tt{font-size:13.5px;padding:9px 6px}
  .header .side-img{display:none}
  .brand .brand-txt .name{font-size:17px}
  .topbar .wrap{min-height:30px}
  .topbar .tb-text{max-width:100%}
  .article{font-size:14.5px;line-height:1.9}
  .reader-stage{padding:6px}
  .pager a{min-width:30px;height:30px;line-height:28px;font-size:13px}
}
@media (max-width:380px){
  .product-grid{grid-template-columns:1fr}
}