/* ============================================================
   漆兄弟 QXD 国内官网 全站样式
   配色:碳钢黑 #15181D / 钢蓝灰 #3D4754 / 静电橙 #F25C05
   ============================================================ */
:root{
  --ink:#15181D;
  --steel:#3D4754;
  --orange:#F25C05;
  --orange-dark:#D14E02;
  --bg:#F6F7F9;
  --line:#E3E6EA;
  --white:#FFFFFF;
  --text:#23272E;
  --muted:#6B7480;
  --maxw:1180px;
}
*{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;}
@media (prefers-reduced-motion: reduce){html{scroll-behavior:auto;} *{animation:none!important;transition:none!important;}}
body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans CJK SC",sans-serif;
  color:var(--text);background:var(--bg);font-size:16px;line-height:1.75;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 20px;}

/* ---- 粉末色带(品牌标志元素) ---- */
.powder-strip{
  height:5px;width:100%;
  background:linear-gradient(90deg,
    #F25C05 0 14%, #E8B40C 14% 28%, #2E8B57 28% 42%,
    #1F6FB2 42% 56%, #5B4A9E 56% 70%, #B0B6BD 70% 84%, #2B313A 84% 100%);
}

/* ---- 顶栏 ---- */
.topbar{background:var(--ink);color:#C9CED6;font-size:13px;}
.topbar .wrap{display:flex;justify-content:space-between;align-items:center;height:34px;}
.topbar a{color:#C9CED6;}
header.site{background:var(--white);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:100;}
header.site .wrap{display:flex;align-items:center;justify-content:space-between;height:72px;}
.logo{display:flex;align-items:baseline;gap:10px;}
.logo b{font-size:24px;color:var(--ink);letter-spacing:1px;}
.logo span{font-size:12px;color:var(--muted);letter-spacing:2px;}
.hot-tel{text-align:right;line-height:1.3;}
.hot-tel small{color:var(--muted);font-size:12px;}
.hot-tel b{display:block;color:var(--orange);font-size:22px;font-family:"Helvetica Neue",Arial,sans-serif;letter-spacing:.5px;}
nav.main{background:var(--steel);}
nav.main ul{display:flex;list-style:none;max-width:var(--maxw);margin:0 auto;padding:0 8px;}
nav.main a{display:block;padding:13px 26px;color:#E8EBEF;font-size:16px;transition:background .2s;}
nav.main a:hover,nav.main a:focus-visible,nav.main li.on a{background:var(--orange);color:#fff;outline:none;}

/* ---- Hero ---- */
.hero{background:var(--ink);color:#fff;overflow:hidden;}
.hero .wrap{display:grid;grid-template-columns:1.15fr 1fr;gap:48px;align-items:center;padding:72px 20px;}
.hero .eyebrow{color:var(--orange);font-size:15px;letter-spacing:4px;margin-bottom:18px;}
.hero h1{font-size:46px;line-height:1.25;font-weight:800;letter-spacing:1px;}
.hero h1 em{font-style:normal;color:var(--orange);}
.hero p.sub{margin:22px 0 34px;color:#B7BEC8;font-size:17px;max-width:34em;}
.hero .btns{display:flex;gap:16px;flex-wrap:wrap;}
.btn{display:inline-block;padding:14px 34px;border-radius:4px;font-size:16px;font-weight:600;transition:background .2s,transform .15s;}
.btn:focus-visible{outline:3px solid #fff;outline-offset:2px;}
.btn-orange{background:var(--orange);color:#fff;}
.btn-orange:hover{background:var(--orange-dark);}
.btn-ghost{border:1px solid #5A6371;color:#E8EBEF;}
.btn-ghost:hover{border-color:#fff;}
.hero .pic{position:relative;}
.hero .pic img{border-radius:6px;}
.hero .pic .tag{position:absolute;left:-14px;bottom:18px;background:var(--orange);color:#fff;padding:8px 18px;font-size:14px;border-radius:3px;box-shadow:0 6px 18px rgba(0,0,0,.35);}

/* ---- 通用区块 ---- */
section.block{padding:72px 0;}
section.block.alt{background:var(--white);}
.sec-head{text-align:center;margin-bottom:48px;}
.sec-head .en{color:var(--muted);font-size:13px;letter-spacing:4px;text-transform:uppercase;}
.sec-head h2{font-size:32px;color:var(--ink);margin-top:6px;font-weight:800;}
.sec-head .bar{width:56px;height:4px;background:var(--orange);margin:16px auto 0;}

/* ---- 痛点对比 ---- */
.pain{display:grid;grid-template-columns:1fr 1fr;gap:28px;}
.pain .card{background:var(--white);border:1px solid var(--line);border-radius:6px;padding:34px;}
.pain .card.bad{border-top:4px solid #9AA1AB;}
.pain .card.good{border-top:4px solid var(--orange);}
.pain h3{font-size:20px;margin-bottom:14px;color:var(--ink);}
.pain ul{list-style:none;}
.pain li{padding:7px 0 7px 26px;position:relative;color:var(--text);}
.pain .bad li::before{content:"✕";position:absolute;left:0;color:#9AA1AB;font-weight:700;}
.pain .good li::before{content:"✓";position:absolute;left:0;color:var(--orange);font-weight:700;}

/* ---- 数据带 ---- */
.stats{background:var(--steel);color:#fff;padding:54px 0;}
.stats .wrap{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;text-align:center;}
.stats b{font-size:40px;font-family:"Helvetica Neue",Arial,sans-serif;color:#fff;display:block;line-height:1.1;}
.stats b i{font-style:normal;font-size:20px;color:var(--orange);margin-left:2px;}
.stats span{color:#C9CED6;font-size:14px;}
.stats small{display:block;color:#8E97A3;font-size:12px;margin-top:34px;text-align:center;}

/* ---- 三步原理 ---- */
.how{display:grid;grid-template-columns:repeat(3,1fr);gap:28px;}
.how .step{background:var(--white);border:1px solid var(--line);border-radius:6px;padding:34px 28px;}
.how .step .no{font-family:"Helvetica Neue",Arial,sans-serif;font-size:15px;color:var(--orange);font-weight:700;letter-spacing:1px;}
.how .step h3{font-size:19px;color:var(--ink);margin:10px 0 12px;}
.how .step p{font-size:15px;color:var(--muted);}

/* ---- 产品卡 / 案例卡 ---- */
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:28px;}
.grid2{display:grid;grid-template-columns:repeat(2,1fr);gap:28px;}
.case{background:var(--white);border:1px solid var(--line);border-radius:6px;overflow:hidden;transition:transform .2s,box-shadow .2s;}
.case:hover{transform:translateY(-4px);box-shadow:0 12px 28px rgba(21,24,29,.10);}
.case img{height:210px;width:100%;object-fit:cover;}
.case .body{padding:22px 24px 26px;}
.case h3{font-size:18px;color:var(--ink);margin-bottom:8px;}
.case p{font-size:14px;color:var(--muted);}

/* ---- 参数表 ---- */
table.spec{width:100%;border-collapse:collapse;background:var(--white);}
table.spec th,table.spec td{border:1px solid var(--line);padding:13px 18px;text-align:left;font-size:15px;}
table.spec th{background:#EEF0F3;color:var(--ink);width:32%;font-weight:600;}

/* ---- 文章列表/正文 ---- */
.art-list .item{background:var(--white);border:1px solid var(--line);border-radius:6px;padding:28px 32px;margin-bottom:20px;transition:border-color .2s;}
.art-list .item:hover{border-color:var(--orange);}
.art-list h3{font-size:19px;color:var(--ink);margin-bottom:8px;}
.art-list p{font-size:14px;color:var(--muted);}
article.post{background:var(--white);border:1px solid var(--line);border-radius:6px;padding:48px 56px;max-width:880px;margin:0 auto;}
article.post h1{font-size:30px;color:var(--ink);line-height:1.4;margin-bottom:10px;}
article.post .meta{color:var(--muted);font-size:13px;margin-bottom:30px;padding-bottom:18px;border-bottom:1px solid var(--line);}
article.post h2{font-size:22px;color:var(--ink);margin:34px 0 14px;padding-left:14px;border-left:4px solid var(--orange);}
article.post p{margin:14px 0;}
article.post ul,article.post ol{margin:14px 0 14px 24px;}
article.post li{margin:6px 0;}

/* ---- 联系 CTA ---- */
.cta{background:linear-gradient(135deg,var(--ink) 0%,#2B313A 100%);color:#fff;text-align:center;padding:64px 20px;}
.cta h2{font-size:30px;font-weight:800;}
.cta p{color:#B7BEC8;margin:14px 0 30px;}

/* ---- 联系页 ---- */
.contact-grid{display:grid;grid-template-columns:1.2fr 1fr;gap:40px;align-items:start;}
.contact-card{background:var(--white);border:1px solid var(--line);border-radius:6px;padding:38px 42px;}
.contact-card h3{font-size:20px;color:var(--ink);margin-bottom:20px;}
.contact-card .row{display:flex;gap:14px;margin:16px 0;align-items:baseline;}
.contact-card .row b{color:var(--ink);min-width:5.5em;}
.qr-box{text-align:center;background:var(--white);border:1px solid var(--line);border-radius:6px;padding:34px;}
.qr-box img{width:220px;height:220px;margin:0 auto 14px;border:1px solid var(--line);}
.qr-box p{color:var(--muted);font-size:14px;}

/* ---- 页脚 ---- */
footer.site{background:var(--ink);color:#9AA1AB;font-size:14px;}
footer.site .cols{display:grid;grid-template-columns:2fr 1fr 1fr;gap:40px;padding:54px 0 40px;}
footer.site h4{color:#fff;font-size:16px;margin-bottom:16px;}
footer.site a{display:block;padding:4px 0;color:#9AA1AB;}
footer.site a:hover{color:var(--orange);}
footer.site .icp{border-top:1px solid #2B313A;text-align:center;padding:18px 20px;font-size:13px;color:#6B7480;}
footer.site .icp a{display:inline;color:#6B7480;}

/* ---- 右侧浮动咨询栏 ---- */
.float-bar{position:fixed;right:0;top:45%;z-index:200;display:flex;flex-direction:column;}
.float-bar .fb{width:56px;height:56px;background:var(--steel);color:#fff;display:flex;flex-direction:column;align-items:center;justify-content:center;font-size:11px;cursor:pointer;border:none;border-bottom:1px solid #4A5462;position:relative;}
.float-bar .fb svg{width:22px;height:22px;margin-bottom:3px;fill:#fff;}
.float-bar .fb:hover{background:var(--orange);}
.float-bar .pop{position:absolute;right:62px;top:50%;transform:translateY(-50%);background:#fff;border:1px solid var(--line);border-radius:6px;padding:12px;display:none;box-shadow:0 8px 24px rgba(0,0,0,.18);text-align:center;}
.float-bar .pop img{width:150px;height:150px;}
.float-bar .pop span{display:block;font-size:12px;color:var(--text);margin-top:6px;white-space:nowrap;}
.float-bar .fb:hover .pop,.float-bar .fb:focus-within .pop{display:block;}

/* ---- 占位图样式(部署替换真实图片后自动失效) ---- */
img.ph{background:repeating-linear-gradient(45deg,#E6E9ED,#E6E9ED 12px,#EFF1F4 12px,#EFF1F4 24px);min-height:180px;object-fit:cover;}

/* ---- 移动端 ---- */
.nav-toggle{display:none;}
@media (max-width:900px){
  .hero .wrap{grid-template-columns:1fr;padding:48px 20px;}
  .hero h1{font-size:32px;}
  .pain,.how,.grid3,.grid2,.contact-grid{grid-template-columns:1fr;}
  .stats .wrap{grid-template-columns:repeat(2,1fr);gap:32px 12px;}
  header.site .wrap{height:62px;}
  .hot-tel b{font-size:18px;}
  nav.main ul{flex-wrap:wrap;}
  nav.main a{padding:11px 16px;font-size:15px;}
  article.post{padding:30px 22px;}
  section.block{padding:48px 0;}
  .topbar{display:none;}
  .float-bar .fb{width:48px;height:48px;}
}

/* ---- 导航下拉子菜单 ---- */
nav.main li.has-sub{position:relative;}
nav.main li.has-sub > a::after{content:"▾";margin-left:6px;font-size:12px;opacity:.8;}
nav.main .submenu{
  position:absolute;top:100%;left:0;min-width:190px;
  background:var(--steel);box-shadow:0 8px 24px rgba(0,0,0,.25);
  list-style:none;padding:6px 0;margin:0;z-index:120;
  opacity:0;visibility:hidden;transform:translateY(6px);transition:all .18s;
}
nav.main li.has-sub:hover .submenu,
nav.main li.has-sub:focus-within .submenu{opacity:1;visibility:visible;transform:translateY(0);}
nav.main .submenu li{display:block;}
nav.main .submenu a{display:block;padding:11px 22px;font-size:15px;white-space:nowrap;}
nav.main .submenu a:hover{background:var(--orange);}

/* ---- 液体喷涂产品长图列表 ---- */
.paint-list{display:flex;flex-direction:column;gap:40px;max-width:920px;margin:0 auto;}
.paint-item{background:var(--white);border:1px solid var(--line);border-radius:8px;overflow:hidden;}
.paint-item .ptitle{padding:22px 28px 0;}
.paint-item .ptitle h3{font-size:21px;color:var(--ink);}
.paint-item .ptitle p{font-size:14px;color:var(--muted);margin-top:6px;}
.paint-item .pimg{padding:24px 28px 28px;text-align:center;}
.paint-item .pimg img{max-width:100%;border-radius:6px;cursor:zoom-in;}

@media (max-width:900px){
  nav.main li.has-sub .submenu{position:static;opacity:1;visibility:visible;transform:none;box-shadow:none;background:#33414f;}
  nav.main li.has-sub > a::after{content:"";}
}

/* ---- 产品系列卡片(粉末设备页) ---- */
.prod-cards{display:grid;grid-template-columns:repeat(2,1fr);gap:28px;}
.prod-card{background:var(--white);border:1px solid var(--line);border-radius:8px;overflow:hidden;display:flex;flex-direction:column;}
.prod-card .pc-img{background:#f4f5f7;text-align:center;padding:0;}
.prod-card .pc-img img{width:100%;display:block;}
.prod-card .pc-body{padding:24px 26px 28px;display:flex;flex-direction:column;flex:1;}
.prod-card .pc-body h3{font-size:20px;color:var(--ink);margin-bottom:12px;}
.prod-card .pc-body p{font-size:14.5px;color:var(--muted);line-height:1.75;flex:1;}
.prod-card .pc-body .btn{margin-top:20px;align-self:flex-start;}

@media (max-width:900px){ .prod-cards{grid-template-columns:1fr;} }

/* ---- 产品详情页 ---- */
.pd-hero{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:start;}
.pd-hero .pd-gallery img{width:100%;border:1px solid var(--line);border-radius:8px;margin-bottom:16px;}
.pd-hero .pd-info h1{font-size:28px;color:var(--ink);line-height:1.3;margin-bottom:20px;}
.pd-hero .pd-info p{font-size:15.5px;color:var(--steel);line-height:1.85;margin-bottom:16px;}
.pd-spec{margin-top:18px;}
.pd-spec li{font-size:15px;color:var(--steel);padding:8px 0;border-bottom:1px dashed var(--line);}
.pd-spec li b{color:var(--ink);}
.breadcrumb{font-size:14px;color:var(--muted);padding:18px 0;}
.breadcrumb a{color:var(--muted);}
.breadcrumb a:hover{color:var(--orange);}
@media (max-width:900px){ .pd-hero{grid-template-columns:1fr;gap:24px;} }

/* 案例卡片可点击 */
.case{display:block;}
.case .more{display:inline-block;margin-top:14px;color:var(--orange);font-size:14px;font-weight:700;}
.case:hover .more{text-decoration:underline;}