/* ============================================================
   宁夏广盛活性炭 · 中文官网样式表
   设计基准：基础字号18px，行距1.9，宽屏留白
   ============================================================ */
*{margin:0;padding:0;box-sizing:border-box}
:root{
  --c-ink:#1a1a1a;
  --c-green:#1f7a3d;
  --c-green-d:#155c2c;
  --c-orange:#e8621a;
  --c-gray:#666;
  --c-light:#f6f8f6;
  --c-line:#e8e8e8;
  --fs-base:18px;
  --lh:1.9;
  --radius:12px;
}
html{font-size:var(--fs-base);scroll-behavior:smooth}
body{font-family:"Microsoft YaHei","PingFang SC","Helvetica Neue",sans-serif;color:#333;line-height:var(--lh);background:#fff}
a{text-decoration:none;color:inherit}
img{max-width:100%;display:block}
ul{list-style:none}
.wrap{max-width:1280px;margin:0 auto;padding:0 24px}

/* ---------- 顶部联系栏 ---------- */
.topbar{background:var(--c-ink);color:#ddd;font-size:0.95rem}
.topbar .wrap{display:flex;justify-content:space-between;align-items:center;height:52px}
.topbar .left{color:#aaa}
.topbar .right{display:flex;align-items:center;gap:26px}
.topbar .hot{color:var(--c-orange);font-weight:700;font-size:1.05rem}
.topbar .hot b{font-size:1.25rem;letter-spacing:1px}
.topbar a:hover{color:#fff}
.topbar .lang{border:1px solid #555;border-radius:4px;padding:2px 0;display:inline-flex}
.topbar .lang a{padding:2px 12px}
.topbar .lang a.on{background:var(--c-green);color:#fff;border-radius:3px}

/* ---------- 导航 ---------- */
.navbar{background:#fff;box-shadow:0 2px 12px rgba(0,0,0,.06);position:sticky;top:0;z-index:100}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:110px}
.brand{display:flex;align-items:center;gap:20px}
.brand .logo{width:84px;height:84px;background:var(--c-green);color:#fff;font-size:1.9rem;font-weight:800;display:flex;align-items:center;justify-content:center;border-radius:12px;letter-spacing:1px}
.brand .name b{font-size:1.6rem;color:var(--c-ink);display:block;letter-spacing:1px}
.brand .name span{font-size:0.88rem;color:var(--c-gray)}
.nav{display:flex;gap:6px}
.nav a{font-size:1.12rem;font-weight:600;color:var(--c-ink);padding:12px 20px;border-radius:6px}
.nav a:hover,.nav a.on{color:var(--c-green);background:var(--c-light)}
.nav-toggle{display:none;font-size:1.6rem;background:none;border:0;color:var(--c-ink);cursor:pointer}

/* ---------- 按钮 ---------- */
.btn{display:inline-flex;align-items:center;gap:10px;font-size:1.1rem;font-weight:700;padding:15px 34px;border-radius:8px;border:0;cursor:pointer}
.btn-orange{background:var(--c-orange);color:#fff}
.btn-green{background:var(--c-green);color:#fff}
.btn-ghost{border:2px solid #fff;color:#fff}
.btn-line{border:2px solid var(--c-green);color:var(--c-green);background:transparent}
.btn:hover{filter:brightness(1.08)}

/* ---------- 首页横幅 ---------- */
.hero{position:relative;min-height:560px;background:#2b2b2b;display:flex;align-items:center;overflow:hidden}
.hero .ph-img{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;color:#999;border:3px dashed #555;font-size:1.15rem;text-align:center;line-height:1.7;background:linear-gradient(135deg,#333,#222)}
.hero .shade{position:absolute;inset:0;background:linear-gradient(90deg,rgba(0,0,0,.75),rgba(0,0,0,.2))}
.hero .txt{position:relative;z-index:2;color:#fff;max-width:760px;padding:60px 0}
.hero .txt .tag{display:inline-block;background:var(--c-green);padding:6px 18px;border-radius:4px;font-size:1rem;letter-spacing:2px}
.hero .txt h1{font-size:2.85rem;font-weight:800;margin:24px 0 18px;line-height:1.42}
.hero .txt p{font-size:1.12rem;color:#e5e5e5}
.hero .btns{margin-top:38px;display:flex;gap:18px;flex-wrap:wrap}

/* ---------- 内页页头 ---------- */
.page-head{background:linear-gradient(120deg,#14331f,#1f7a3d);color:#fff;padding:64px 0}
.page-head h1{font-size:2.4rem;letter-spacing:2px}
.page-head .crumb{font-size:0.95rem;color:#cfe3d3;margin-top:12px}
.page-head .crumb a:hover{color:#fff}

/* ---------- 通用section ---------- */
.sec{padding:0 0 72px}
.sec-head{text-align:center;padding:64px 20px 44px}
.sec-head h2{font-size:2.05rem;color:var(--c-ink);font-weight:700;letter-spacing:2px}
.sec-head p{font-size:1.05rem;color:var(--c-gray);margin-top:14px}
.sec-head .bar{width:60px;height:4px;background:var(--c-green);margin:20px auto 0;border-radius:2px}
.bg-light{background:var(--c-light)}

/* ---------- 实力数据 ---------- */
.stats{background:var(--c-green);color:#fff;padding:44px 0}
.stats .wrap{display:flex;justify-content:space-around;text-align:center;flex-wrap:wrap;gap:30px}
.stats b{font-size:2.5rem;display:block;font-weight:800}
.stats span{font-size:1rem;color:#d6ecd9}

/* ---------- 用途方案卡片 ---------- */
.uses .grid{display:grid;grid-template-columns:repeat(5,1fr);gap:22px}
.use-card{background:#fff;border-radius:var(--radius);overflow:hidden;box-shadow:0 4px 16px rgba(0,0,0,.05);transition:.25s;display:flex;flex-direction:column}
.use-card:hover{transform:translateY(-6px);box-shadow:0 10px 28px rgba(31,122,61,.15)}
.use-card .ph-img{height:180px;display:flex;align-items:center;justify-content:center;border-bottom:2px dashed #c9d6ca;color:#93a99a;background:#eef3ee;font-size:0.92rem;text-align:center;padding:0 12px;line-height:1.6}
.use-card .body{padding:22px 18px 26px;flex:1;display:flex;flex-direction:column}
.use-card h3{font-size:1.22rem;color:var(--c-ink);margin-bottom:8px}
.use-card p{font-size:0.93rem;color:var(--c-gray);line-height:1.8;flex:1}
.use-card .fit{font-size:0.86rem;color:var(--c-green);background:var(--c-light);border-radius:6px;padding:8px 10px;margin-top:12px}
.use-card .go{margin-top:14px;font-weight:600;color:var(--c-green);font-size:0.95rem}

/* ---------- 产品卡片 ---------- */
.prods .grid{display:grid;grid-template-columns:repeat(4,1fr);gap:26px}
.prod-card{border:1px solid var(--c-line);border-radius:var(--radius);overflow:hidden;transition:.25s;background:#fff}
.prod-card:hover{border-color:var(--c-green);box-shadow:0 8px 24px rgba(0,0,0,.08)}
.prod-card .ph-img{height:220px;display:flex;align-items:center;justify-content:center;border-bottom:2px dashed #ddd;color:#aab;background:#fafafa;font-size:0.93rem;text-align:center;padding:0 14px;line-height:1.6}
.prod-card .body{padding:24px}
.prod-card h3{font-size:1.28rem;margin-bottom:10px}
.prod-card p{font-size:0.95rem;color:var(--c-gray)}
.prod-card .more{display:inline-block;margin-top:16px;color:var(--c-green);font-weight:600}

/* ---------- 工厂实力 ---------- */
.factory .flex{display:flex;gap:40px;align-items:stretch}
.factory .left{flex:1.1}
.factory .left h2{font-size:1.9rem;margin-bottom:20px}
.factory .left p{font-size:1.03rem;color:#444;margin-bottom:16px}
.factory .left li{font-size:1.02rem;padding:9px 0 9px 34px;position:relative}
.factory .left li::before{content:"✔";position:absolute;left:0;color:var(--c-green);font-weight:800}
.factory .right{flex:1;display:grid;grid-template-columns:1fr 1fr;gap:14px}
.factory .ph-img{border:2px dashed #c9d6ca;background:#eef3ee;color:#93a99a;display:flex;align-items:center;justify-content:center;font-size:0.93rem;border-radius:10px;text-align:center;padding:10px;min-height:170px;line-height:1.6}
.factory .ph-img.big{grid-column:1/3;min-height:230px}

/* ---------- 新闻 ---------- */
.news .grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.news-card{border:1px solid var(--c-line);border-radius:var(--radius);padding:30px;transition:.25s;background:#fff}
.news-card:hover{border-color:var(--c-green)}
.news-card .date{color:var(--c-green);font-size:0.9rem}
.news-card h3{font-size:1.18rem;margin:12px 0;line-height:1.55}
.news-card p{font-size:0.93rem;color:var(--c-gray)}
.news-card .more{display:inline-block;margin-top:14px;color:var(--c-green);font-weight:600}

/* ---------- 表格 ---------- */
.table-box{overflow-x:auto;margin:24px 0}
table{width:100%;border-collapse:collapse;font-size:0.98rem;min-width:640px}
th,td{border:1px solid var(--c-line);padding:14px 16px;text-align:left}
th{background:var(--c-light);font-weight:700;color:var(--c-ink)}
tbody tr:hover{background:#fbfdfb}

/* ---------- 文章正文 ---------- */
.article{max-width:880px;margin:0 auto;padding:56px 24px 80px}
.article h1{font-size:2.1rem;line-height:1.5;margin-bottom:18px;color:var(--c-ink)}
.article .meta{color:#999;font-size:0.92rem;padding-bottom:24px;border-bottom:1px solid var(--c-line);margin-bottom:32px}
.article h2{font-size:1.5rem;margin:38px 0 16px;color:var(--c-ink);padding-left:14px;border-left:5px solid var(--c-green)}
.article h3{font-size:1.22rem;margin:26px 0 12px;color:var(--c-ink)}
.article p{margin-bottom:18px;color:#3a3a3a}
.article li{margin:10px 0 10px 26px;list-style:disc;color:#3a3a3a}
.article strong{color:var(--c-ink)}
.article .note{background:var(--c-light);border-left:4px solid var(--c-green);padding:18px 22px;border-radius:6px;margin:24px 0}

/* ---------- 联系页 ---------- */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:44px}
.contact-item{display:flex;gap:18px;padding:22px 0;border-bottom:1px dashed var(--c-line)}
.contact-item .ic{width:52px;height:52px;flex:0 0 52px;border-radius:50%;background:var(--c-light);color:var(--c-green);display:flex;align-items:center;justify-content:center;font-weight:800}
.contact-item b{font-size:1.1rem;color:var(--c-ink);display:block;margin-bottom:4px}
.contact-item span{color:var(--c-gray)}
.form-row{margin-bottom:18px}
.form-row label{display:block;font-size:0.98rem;margin-bottom:8px;color:#444}
.form-row input,.form-row textarea,.form-row select{width:100%;font-size:1rem;padding:13px 16px;border:1px solid var(--c-line);border-radius:8px;font-family:inherit}
.form-row textarea{min-height:130px;resize:vertical}
.form-row input:focus,.form-row textarea:focus,.form-row select:focus{outline:2px solid #bfe0c8;border-color:var(--c-green)}
.map-ph{height:320px;border:2px dashed #c9d6ca;background:#eef3ee;color:#93a99a;display:flex;align-items:center;justify-content:center;border-radius:10px;text-align:center;padding:20px;margin-top:20px}

/* ---------- 页脚 ---------- */
.footer{background:var(--c-ink);color:#bbb;padding:64px 0 0;font-size:0.98rem}
.footer .grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:44px;padding-bottom:44px}
.footer h4{color:#fff;font-size:1.12rem;margin-bottom:20px}
.footer li{padding:6px 0}
.footer a:hover{color:#fff}
.footer .addr li{line-height:2}
.footer .social{display:flex;gap:14px;margin-top:18px}
.footer .social-ic{width:44px;height:44px;border:1px solid #555;border-radius:50%;display:flex;align-items:center;justify-content:center;color:#ddd;font-size:0.82rem}
.footer .qr{width:120px;height:120px;border:2px dashed #555;display:flex;align-items:center;justify-content:center;color:#777;font-size:0.8rem;text-align:center;border-radius:8px;margin-top:12px;padding:8px}
.footer .copy{border-top:1px solid #333;text-align:center;padding:22px;font-size:0.9rem;color:#777}

/* ---------- 浮动联系按钮 ---------- */
.float-bar{position:fixed;right:0;top:50%;transform:translateY(-50%);z-index:200;display:flex;flex-direction:column;gap:2px}
.float-bar a{width:112px;padding:16px 10px;text-align:center;color:#fff;font-size:0.92rem;font-weight:700;border-radius:8px 0 0 8px;line-height:1.5}
.float-bar .tel{background:var(--c-orange)}
.float-bar .wa{background:#25d366}
.float-bar .top{background:#555}

/* ---------- 响应式 ---------- */
@media (max-width:1200px){
  .uses .grid{grid-template-columns:repeat(3,1fr)}
  .prods .grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:1024px){
  .news .grid{grid-template-columns:1fr}
  .factory .flex{flex-direction:column}
  .footer .grid{grid-template-columns:1fr 1fr}
  .contact-grid{grid-template-columns:1fr}
  .float-bar{display:none}
}
@media (max-width:768px){
  html{font-size:17px}
  .topbar{display:none}
  .nav-inner{height:auto;flex-wrap:wrap;padding:16px 0;gap:10px}
  .brand .logo{width:64px;height:64px;font-size:1.4rem}
  .brand .name b{font-size:1.2rem}
  .nav-toggle{display:block}
  .nav{display:none;width:100%;flex-direction:column;gap:2px;padding-top:8px}
  .nav.open{display:flex}
  .nav a{padding:14px;border-radius:6px}
  .hero{min-height:480px}
  .hero .txt h1{font-size:1.95rem}
  .page-head{padding:44px 0}
  .page-head h1{font-size:1.7rem}
  .uses .grid{grid-template-columns:1fr}
  .prods .grid{grid-template-columns:1fr}
  .footer .grid{grid-template-columns:1fr}
  .stats b{font-size:1.9rem}
}