/* 泊头市科惠除尘设备有限公司 — 改版演示站样式
   深绿 + 灰，移动优先响应式，纯静态无框架 */
:root{
  --green-900:#0d3b21;
  --green-800:#14532d;
  --green-700:#1a6b3c;
  --green-600:#22804a;
  --green-050:#eef6f0;
  --ink:#26302a;
  --ink-soft:#5a6660;
  --line:#dde4de;
  --bg:#f5f7f5;
  --card:#ffffff;
  --accent:#e8a33d;
  --radius:10px;
  --maxw:1200px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans CJK SC",sans-serif;
  color:var(--ink);
  background:var(--bg);
  line-height:1.7;
  font-size:16px;
  padding-bottom:56px; /* 给手机底部拨号条留位 */
}
img{max-width:100%;height:auto;display:block}
a{color:var(--green-700);text-decoration:none;transition:color .25s ease}
a:hover{text-decoration:underline}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 16px}

/* ---------- 顶部信息栏 ---------- */
.topbar{background:var(--green-900);color:#dcefe2;font-size:13px}
.topbar .wrap{display:flex;justify-content:space-between;align-items:center;gap:12px;padding-top:6px;padding-bottom:6px}
.topbar .hotline{color:#fff;font-weight:600;white-space:nowrap}
.topbar .hotline a{color:#ffd98a}
.topbar .site-name-short{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* ---------- 页眉 / 导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:50;background:#fff;
  border-bottom:3px solid var(--green-800);
  box-shadow:0 2px 10px rgba(13,59,33,.08);
}
.header-in{display:flex;align-items:center;gap:14px;padding-top:10px;padding-bottom:10px}
.logo-badge{
  flex:0 0 auto;width:46px;height:46px;border-radius:10px;
  background:linear-gradient(145deg,var(--green-700),var(--green-900));
  color:#fff;display:flex;align-items:center;justify-content:center;
  font-size:19px;font-weight:700;letter-spacing:1px;white-space:nowrap;
}
.brand{min-width:0}
.brand h1,.brand .brand-name{font-size:19px;margin:0;line-height:1.3;color:var(--green-900);font-weight:700}
.brand p{margin:0;font-size:12px;color:var(--ink-soft);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.header-tel{margin-left:auto;text-align:right;display:none}
.header-tel .label{font-size:12px;color:var(--ink-soft)}
.header-tel .num{font-size:22px;font-weight:800;color:var(--green-800);line-height:1.2}
.nav-toggle{
  margin-left:auto;background:var(--green-800);color:#fff;border:0;border-radius:8px;
  padding:9px 14px;font-size:15px;cursor:pointer;
}
.main-nav{display:none;border-top:1px solid var(--line)}
.main-nav.open{display:block}
.main-nav ul{list-style:none;margin:0;padding:6px 0}
.main-nav a{
  display:block;padding:10px 16px;color:var(--ink);font-size:16px;border-radius:6px;
  transition:background-color .25s ease,color .25s ease;
}
.main-nav a:hover{background:var(--green-050);text-decoration:none}
.main-nav a.active{color:var(--green-800);font-weight:700;background:var(--green-050)}

/* ---------- Hero：整幅工业实拍背景 + 深色渐变遮罩 ---------- */
.hero{
  position:relative;background:var(--green-900);color:#fff;overflow:hidden;
  display:flex;align-items:center;min-height:360px;
}
.hero img.hero-bg{
  position:absolute;inset:0;width:100%;height:100%;
  object-fit:cover;object-position:center 38%;
  animation:hero-settle 2.2s ease-out both;
}
@keyframes hero-settle{from{transform:scale(1.07)}to{transform:scale(1)}}
.hero::after{
  content:"";position:absolute;inset:0;z-index:1;
  background:
    linear-gradient(0deg,rgba(7,32,17,.5),rgba(7,32,17,0) 45%),
    linear-gradient(90deg,rgba(7,32,17,.85) 0%,rgba(7,32,17,.6) 48%,rgba(7,32,17,.25) 100%);
}
.hero-in{position:relative;z-index:2;width:100%;padding:46px 0}
.hero h2{font-size:26px;margin:0 0 8px;line-height:1.35;text-shadow:0 2px 8px rgba(0,0,0,.4)}
.hero p{margin:0 0 16px;font-size:15px;color:#e6f2ea;max-width:640px;text-shadow:0 1px 6px rgba(0,0,0,.4)}
.hero-btns{display:flex;gap:10px;flex-wrap:wrap}
.btn{
  display:inline-block;padding:11px 22px;border-radius:8px;font-weight:700;font-size:15px;
  transition:filter .3s ease,transform .3s ease,background-color .3s ease;
}
.btn:hover{text-decoration:none;filter:brightness(1.07);transform:translateY(-1px)}
.btn-call{background:var(--accent);color:#3a2a05}
.btn-ghost{background:rgba(255,255,255,.14);color:#fff;border:1px solid rgba(255,255,255,.65)}

/* ---------- 通用区块 ---------- */
.section{padding:34px 0 6px}
.section-head{display:flex;align-items:baseline;gap:12px;margin-bottom:16px;border-bottom:2px solid var(--line);padding-bottom:8px}
.section-head h2,.section-head h3{margin:0;font-size:21px;color:var(--green-900)}
.section-head h2::before,.section-head h3::before{
  content:"";display:inline-block;width:5px;height:20px;background:var(--green-700);
  border-radius:3px;margin-right:9px;vertical-align:-3px;
}
.section-head .more{margin-left:auto;font-size:14px;white-space:nowrap}

/* ---------- 卡片网格 ---------- */
.grid{display:grid;grid-template-columns:1fr;gap:16px}
.card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;display:flex;flex-direction:column;
  transition:box-shadow .35s ease,transform .35s ease;
}
.card:hover{box-shadow:0 10px 26px rgba(13,59,33,.16);transform:translateY(-3px)}
.card .thumb{aspect-ratio:4/3;overflow:hidden;background:var(--green-050)}
.card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .8s cubic-bezier(.22,.61,.36,1)}
.card:hover .thumb img{transform:scale(1.07)}
.card .thumb .ph{
  width:100%;height:100%;display:flex;align-items:center;justify-content:center;
  padding:14px;text-align:center;color:var(--green-800);font-weight:700;font-size:18px;
  background:linear-gradient(150deg,#e3efe6,#cfe3d5);
}
.card .body{padding:13px 15px 15px;display:flex;flex-direction:column;gap:7px;flex:1}
.card h3{margin:0;font-size:16.5px;line-height:1.45}
.card h3 a{color:var(--ink)}
.card h3 a:hover{color:var(--green-700);text-decoration:none}
.card p{margin:0;font-size:13.5px;color:var(--ink-soft);flex:1}
.card .go{font-size:13.5px;font-weight:600}

/* 分类卡片 */
.cat-card .body{align-items:flex-start}
.cat-card .count{font-size:12.5px;color:var(--green-700);background:var(--green-050);border-radius:20px;padding:1px 10px}

/* ---------- 页面头（内页） ---------- */
.page-head{
  background:
    linear-gradient(100deg,rgba(8,34,19,.88) 0%,rgba(13,59,33,.7) 55%,rgba(13,59,33,.5) 100%),
    url("assets/img_085.jpg") center 18%/cover no-repeat var(--green-900);
  color:#fff;padding:30px 0;
}
.page-head h2{margin:0 0 4px;font-size:24px}
.crumbs{font-size:13px;color:#cfe5d6}
.crumbs a{color:#eaf5ee}

/* ---------- 内页布局：侧栏 + 正文 ---------- */
.layout{display:block}
.side-nav{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;margin-bottom:18px}
.side-nav h3{margin:0;background:var(--green-800);color:#fff;font-size:16px;padding:11px 16px}
.side-nav ul{list-style:none;margin:0;padding:6px}
.side-nav a{display:block;padding:9px 12px;border-radius:6px;color:var(--ink);font-size:15px;transition:background-color .25s ease,color .25s ease}
.side-nav a:hover{background:var(--green-050);text-decoration:none}
.side-nav a.active{background:var(--green-050);color:var(--green-800);font-weight:700}
.side-contact{margin-top:16px;background:var(--green-050);border:1px solid var(--line);border-radius:var(--radius);padding:14px 16px;font-size:14px}
.side-contact h4{margin:0 0 8px;color:var(--green-900);font-size:15px}
.side-contact p{margin:3px 0;color:var(--ink-soft)}
.side-contact .big{font-size:19px;font-weight:800;color:var(--green-800)}
.content{min-width:0}
.panel{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:20px 18px}
.panel h3{color:var(--green-900);margin:20px 0 8px;font-size:18px}
.panel h3:first-child{margin-top:0}
.panel p{margin:0 0 12px}
.panel ul{margin:0 0 12px;padding-left:20px}
.panel li{margin-bottom:5px}

/* ---------- 参数表 ---------- */
.table-scroll{overflow-x:auto;margin:0 0 14px;border:1px solid var(--line);border-radius:8px}
table.spec{border-collapse:collapse;width:100%;min-width:760px;font-size:13.5px;background:#fff}
table.spec th,table.spec td{border:1px solid var(--line);padding:7px 9px;text-align:center;white-space:nowrap}
table.spec th{background:var(--green-800);color:#fff;font-weight:600}
table.spec td:first-child,table.spec th:first-child{text-align:left;font-weight:600;background:var(--green-050)}
table.spec th:first-child{background:var(--green-800)}

/* ---------- 产品详情 ---------- */
.pd-top{display:grid;grid-template-columns:1fr;gap:18px}
.pd-photo{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:var(--green-050)}
.pd-photo img{width:100%;height:100%;object-fit:cover;aspect-ratio:4/3;transition:transform .8s cubic-bezier(.22,.61,.36,1)}
.pd-photo:hover img{transform:scale(1.04)}
.supplier{background:var(--green-050);border:1px solid var(--line);border-radius:var(--radius);padding:16px 18px}
.supplier h3{margin:0 0 10px;color:var(--green-900);font-size:17px}
.supplier dl{margin:0;display:grid;grid-template-columns:64px 1fr;row-gap:7px;font-size:15px}
.supplier dt{color:var(--ink-soft)}
.supplier dd{margin:0;font-weight:600}
.supplier .tel-num{color:var(--green-800);font-size:19px;font-weight:800}

/* ---------- 新闻 ---------- */
.news-list{display:flex;flex-direction:column;gap:14px}
.news-item{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:16px 18px;display:flex;gap:16px;transition:box-shadow .3s ease}
.news-item:hover{box-shadow:0 6px 18px rgba(13,59,33,.10)}
.news-item .date{
  flex:0 0 auto;text-align:center;background:var(--green-050);border-radius:8px;
  padding:8px 10px;height:fit-content;min-width:74px;
}
.news-item .date .d{font-size:19px;font-weight:800;color:var(--green-800);line-height:1.2}
.news-item .date .m{font-size:12px;color:var(--ink-soft)}
.news-item h3{margin:0 0 5px;font-size:16.5px}
.news-item h3 a{color:var(--ink)}
.news-item h3 a:hover{color:var(--green-700)}
.news-item p{margin:0;font-size:13.5px;color:var(--ink-soft)}
.news-item .thumb{flex:0 0 108px;border-radius:6px;overflow:hidden}
.news-item .thumb img{width:108px;height:82px;object-fit:cover;transition:transform .8s cubic-bezier(.22,.61,.36,1)}
.news-item:hover .thumb img{transform:scale(1.08)}
.article-meta{font-size:13px;color:var(--ink-soft);border-bottom:1px solid var(--line);padding-bottom:10px;margin-bottom:14px}
.article-img{border-radius:var(--radius);overflow:hidden;margin:14px 0}
.article-img img{transition:transform .8s cubic-bezier(.22,.61,.36,1)}
.article-img:hover img{transform:scale(1.04)}

/* ---------- 生产现场 ---------- */
.gallery{display:grid;grid-template-columns:1fr;gap:14px}
.gallery figure{margin:0;background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:box-shadow .35s ease,transform .35s ease}
.gallery figure:hover{box-shadow:0 8px 22px rgba(13,59,33,.13);transform:translateY(-2px)}
.gallery img{width:100%;aspect-ratio:4/3;object-fit:cover;transition:transform .8s cubic-bezier(.22,.61,.36,1)}
.gallery figure:hover img{transform:scale(1.06)}
.gallery figcaption{padding:9px 13px;font-size:13.5px;color:var(--ink-soft)}

/* ---------- 联系 ---------- */
.contact-grid{display:grid;grid-template-columns:1fr;gap:16px}
.contact-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:20px}
.contact-card h3{margin:0 0 12px;color:var(--green-900)}
.contact-card dl{margin:0;display:grid;grid-template-columns:70px 1fr;row-gap:10px;font-size:15.5px}
.contact-card dt{color:var(--ink-soft)}
.contact-card dd{margin:0;font-weight:600;word-break:break-all}
.qr-box{text-align:center}
.qr-box img{width:150px;height:150px;margin:0 auto;border:1px solid var(--line);border-radius:8px}
.qr-box p{font-size:13px;color:var(--ink-soft);margin:8px 0 0}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--green-900);color:#cfe0d4;margin-top:42px;padding:28px 0 30px;font-size:14px}
.site-footer .f-grid{display:grid;grid-template-columns:1fr;gap:18px}
.site-footer h4{color:#fff;margin:0 0 9px;font-size:16px}
.site-footer p{margin:4px 0}
.site-footer a{color:#ffd98a}
.footer-nav{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:6px 16px}
.footer-nav a{color:#cfe0d4}
.copyright{border-top:1px solid rgba(255,255,255,.16);margin-top:20px;padding-top:14px;font-size:13px;color:#9db8a6}

/* ---------- 手机底部拨号条 ---------- */
.callbar{
  position:fixed;left:0;right:0;bottom:0;z-index:60;display:flex;
  background:#fff;border-top:1px solid var(--line);box-shadow:0 -3px 12px rgba(13,59,33,.12);
}
.callbar a{
  flex:1;text-align:center;padding:12px 6px;font-weight:700;font-size:15.5px;color:var(--green-800);
  transition:background-color .25s ease,color .25s ease;
}
.callbar a.main{background:var(--green-800);color:#fff}
.callbar a:hover{text-decoration:none}

/* ---------- 平板 ---------- */
@media (min-width:640px){
  body{padding-bottom:0}
  .callbar{display:none}
  .grid{grid-template-columns:repeat(2,1fr)}
  .gallery{grid-template-columns:repeat(2,1fr)}
  .hero{min-height:430px}
  .hero h2{font-size:31px}
  .brand h1,.brand .brand-name{font-size:21px}
  .site-footer .f-grid{grid-template-columns:1.4fr 1fr 1fr}
}
/* ---------- 桌面 ---------- */
@media (min-width:1024px){
  .nav-toggle{display:none}
  .header-tel{display:block}
  .main-nav{display:block;border-top:1px solid var(--line);background:#fff}
  .main-nav ul{display:flex;gap:2px;padding:0}
  .main-nav a{padding:12px 20px;border-radius:0;font-size:16.5px}
  .main-nav a.active{box-shadow:inset 0 -3px 0 var(--green-700)}
  .grid{grid-template-columns:repeat(3,1fr)}
  .grid.cols-4{grid-template-columns:repeat(4,1fr)}
  .gallery{grid-template-columns:repeat(3,1fr)}
  .layout{display:grid;grid-template-columns:250px 1fr;gap:22px;align-items:start}
  .side-nav{margin-bottom:0}
  .pd-top{grid-template-columns:1.05fr 1fr}
  .contact-grid{grid-template-columns:1.5fr 1fr}
  .hero{min-height:490px}
  .hero h2{font-size:36px}
  .panel{padding:26px 30px}
}

/* ---------- 减动效偏好 ---------- */
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{transition:none !important;animation:none !important}
  html{scroll-behavior:auto}
}