/* =========================================================
   武穴市精隆钎具有限公司 — 全新重设计样式
   设计参考：cn.lhsdrill.com（工业蓝主调，克制留白）
   纯静态 / 无依赖 / 响应式
   ========================================================= */

:root{
  --blue:#1763c9;
  --blue-d:#0e4ba0;
  --blue-dd:#0a3a7d;
  --blue-l:#eaf2fc;
  --ink:#1c2733;
  --body:#46505c;
  --muted:#8b96a3;
  --line:#e7ebf0;
  --bg:#f5f7fa;
  --white:#fff;
  --radius:10px;
  --shadow:0 6px 22px rgba(20,40,80,.08);
  --shadow-h:0 12px 30px rgba(20,40,80,.14);
  --maxw:1200px;
}

*{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  font-family:"Microsoft YaHei","PingFang SC","Hiragino Sans GB","Segoe UI",sans-serif;
  color:var(--body);font-size:14px;line-height:1.8;
  background:var(--bg);-webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;transition:color .2s,background .2s;}
ul{list-style:none;}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 20px;}

/* ---------- 顶部工具条 ---------- */
.topbar{background:var(--blue-dd);color:#cfe0f7;font-size:12.5px;}
.topbar .container{display:flex;align-items:center;justify-content:space-between;height:38px;}
.topbar a{color:#cfe0f7;}
.topbar .tb-left span{margin-right:22px;}
.topbar .tb-left i{color:#7fb0ef;font-style:normal;margin-right:6px;}
.topbar .tb-right a{margin-left:18px;}
.topbar .tb-right a:hover{color:#fff;}

/* ---------- 头部导航 ---------- */
.header{background:var(--white);position:sticky;top:0;z-index:50;
  border-bottom:1px solid var(--line);transition:box-shadow .25s;}
.header.scrolled{box-shadow:var(--shadow);}
.header .container{display:flex;align-items:center;justify-content:space-between;height:74px;}
.logo{display:flex;align-items:center;gap:12px;flex:0 0 auto;min-width:0;}
.logo .mark{width:40px;height:40px;flex:0 0 40px;}
.logo .name{font-size:20px;font-weight:800;color:var(--ink);letter-spacing:.5px;line-height:1.15;}
.logo .name small{display:block;font-size:11px;font-weight:500;color:var(--muted);letter-spacing:1.5px;}

.nav{display:flex;align-items:center;min-width:0;}
.nav>ul{display:flex;align-items:center;}
/* 防止窄屏时栏目文字折行导致错位：一律单行 + 不收缩 */
.nav>ul>li{flex:0 0 auto;}
.nav>ul>li{position:relative;}
.nav>ul>li>a{display:block;padding:0 20px;height:74px;line-height:74px;
  font-size:15.5px;color:var(--ink);font-weight:600;position:relative;white-space:nowrap;flex:0 0 auto;}
.nav>ul>li>a::after{content:"";position:absolute;left:20px;right:20px;bottom:18px;height:3px;
  background:var(--blue);border-radius:3px;transform:scaleX(0);transition:transform .25s;}
.nav>ul>li>a:hover,.nav>ul>li>a.active{color:var(--blue);}
.nav>ul>li>a:hover::after,.nav>ul>li>a.active::after{transform:scaleX(1);}
/* 二级下拉 */
.nav .sub{position:absolute;top:74px;left:0;min-width:180px;background:var(--white);
  border:1px solid var(--line);border-top:2px solid var(--blue);box-shadow:var(--shadow);
  opacity:0;visibility:hidden;transform:translateY(8px);transition:.22s;padding:6px 0;}
.nav>ul>li:hover .sub{opacity:1;visibility:visible;transform:translateY(0);}
.nav .sub a{display:block;padding:9px 20px;font-size:14px;color:var(--body);font-weight:500;}
.nav .sub a:hover{background:var(--blue-l);color:var(--blue);}
/* 最后一个栏目的下拉靠右展开，防止溢出屏幕 */
.nav>ul>li:last-child .sub{left:auto;right:0;}

.logo .logo-img{height:48px;width:auto;display:block;}

/* ---------- 首页标语横幅 ---------- */
.slogan-band{line-height:0;}
.slogan-band img{width:100%;display:block;}

/* ---------- 产品相册 ---------- */
.gallery .thumbs{display:flex;gap:10px;margin-top:12px;flex-wrap:wrap;}
.gallery .thumbs img{width:66px;height:66px;object-fit:cover;border:2px solid var(--line);
  border-radius:6px;cursor:pointer;transition:.2s;}
.gallery .thumbs img:hover,.gallery .thumbs img.on{border-color:var(--blue);}

.nav-toggle{display:none;width:42px;height:42px;border:none;background:none;cursor:pointer;}
.nav-toggle span{display:block;width:24px;height:2px;background:var(--ink);margin:5px auto;transition:.25s;}

/* ---------- 按钮 ---------- */
.btn{display:inline-block;padding:12px 28px;border-radius:6px;font-size:15px;font-weight:600;
  transition:.22s;cursor:pointer;border:1px solid transparent;}
.btn-primary{background:var(--blue);color:#fff;}
.btn-primary:hover{background:var(--blue-d);box-shadow:0 8px 20px rgba(23,99,201,.35);}
.btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.8);}
.btn-ghost:hover{background:#fff;color:var(--blue);}
.btn-line{background:#fff;color:var(--blue);border-color:var(--blue);}
.btn-line:hover{background:var(--blue);color:#fff;}

/* ---------- 首页 Hero 轮播 ---------- */
.hero{position:relative;height:540px;overflow:hidden;background:var(--blue-dd);}
.hero .flexslider{height:540px;border:0;margin:0;border-radius:0;box-shadow:none;}
.hero .slides li{height:540px;position:relative;}
.hero .slide-cap{position:absolute;inset:0;display:flex;flex-direction:column;
  justify-content:center;align-items:flex-start;padding:0 8%;
  background:linear-gradient(90deg,rgba(10,40,90,.78),rgba(10,40,90,.15));}
.hero .slide-cap .eyebrow{color:#9fc4f5;font-size:14px;letter-spacing:3px;margin-bottom:14px;}
.hero .slide-cap h1{color:#fff;font-size:46px;font-weight:800;line-height:1.2;margin-bottom:18px;
  text-shadow:0 2px 12px rgba(0,0,0,.25);}
.hero .slide-cap p{color:#e3edfb;font-size:17px;max-width:560px;margin-bottom:30px;}
.hero .slide-cap .btn{margin-right:14px;}
.flex-control-nav{bottom:18px!important;z-index:5;}
.flex-control-paging li a{background:rgba(255,255,255,.5);box-shadow:none;}
.flex-control-paging li a.flex-active{background:#fff;}
.flex-direction-nav a{height:48px;}

/* ---------- 通用区块 ---------- */
.section{padding:70px 0;}
.section.alt{background:var(--white);}
.section-head{text-align:center;max-width:720px;margin:0 auto 46px;}
.section-head .kicker{color:var(--blue);font-size:13px;font-weight:700;letter-spacing:2px;}
.section-head h2{font-size:32px;color:var(--ink);font-weight:800;margin:10px 0 12px;position:relative;display:inline-block;}
.section-head h2::after{content:"";display:block;width:54px;height:4px;background:var(--blue);
  border-radius:3px;margin:14px auto 0;}
.section-head p{color:var(--muted);font-size:15px;}

/* ---------- 产品中心（卡片网格） ---------- */
.prod-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;}
.prod-card{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;transition:.25s;}
.prod-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-h);border-color:#cfe0f7;}
.prod-card .pic{height:200px;overflow:hidden;background:var(--blue-l);}
.prod-card .pic img{width:100%;height:100%;object-fit:cover;transition:transform .4s;}
.prod-card:hover .pic img{transform:scale(1.06);}
.prod-card .info{padding:18px 18px 22px;}
.prod-card .info h3{font-size:16.5px;color:var(--ink);font-weight:700;margin-bottom:8px;}
.prod-card .info p{font-size:13px;color:var(--muted);height:42px;overflow:hidden;}
.prod-card .info .more{display:inline-block;margin-top:12px;color:var(--blue);font-weight:600;font-size:13.5px;}
.prod-card .info .more::after{content:" ›";}

/* ---------- 关于我们 ---------- */
.about{display:grid;grid-template-columns:1fr 1.1fr;gap:54px;align-items:center;}
.about .pic{border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);}
.about .pic img{width:100%;height:380px;object-fit:cover;}
.about .txt h2{font-size:30px;color:var(--ink);font-weight:800;margin-bottom:6px;}
.about .txt .sub{color:var(--blue);font-weight:600;margin-bottom:18px;letter-spacing:1px;}
.about .txt p{margin-bottom:16px;color:var(--body);}
.about .stats{display:flex;gap:30px;margin-top:24px;}
.about .stats .num{font-size:30px;font-weight:800;color:var(--blue);line-height:1;}
.about .stats .lbl{font-size:13px;color:var(--muted);margin-top:6px;}

/* ---------- 优势条 ---------- */
.features{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;}
.feature{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);
  padding:30px 24px;text-align:center;transition:.25s;}
.feature:hover{transform:translateY(-5px);box-shadow:var(--shadow);}
.feature .ic{width:58px;height:58px;margin:0 auto 16px;border-radius:14px;background:var(--blue-l);
  display:flex;align-items:center;justify-content:center;}
.feature .ic svg{width:30px;height:30px;stroke:var(--blue);fill:none;stroke-width:1.8;}
.feature h3{font-size:17px;color:var(--ink);margin-bottom:8px;font-weight:700;}
.feature p{font-size:13.5px;color:var(--muted);}

/* ---------- 新闻列表 ---------- */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.news-card{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;transition:.25s;display:flex;flex-direction:column;}
.news-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-h);}
.news-card .pic{height:180px;overflow:hidden;background:var(--blue-l);}
.news-card .pic img{width:100%;height:100%;object-fit:cover;transition:transform .4s;}
.news-card:hover .pic img{transform:scale(1.06);}
.news-card .body{padding:18px 20px 22px;flex:1;display:flex;flex-direction:column;}
.news-card .date{font-size:12.5px;color:var(--blue);font-weight:600;margin-bottom:8px;}
.news-card h3{font-size:16px;color:var(--ink);font-weight:700;line-height:1.5;margin-bottom:10px;}
.news-card p{font-size:13px;color:var(--muted);flex:1;overflow:hidden;}
.news-card .more{margin-top:12px;color:var(--blue);font-weight:600;font-size:13.5px;}

.news-list{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;}
.news-list li{border-bottom:1px solid var(--line);}
.news-list li:last-child{border-bottom:0;}
.news-list a{display:flex;align-items:center;padding:16px 22px;gap:18px;}
.news-list a:hover{background:var(--blue-l);}
.news-list .d{flex:0 0 92px;color:var(--blue);font-weight:700;font-size:14px;}
.news-list .t{flex:1;color:var(--ink);font-weight:600;font-size:15px;transition:color .2s;}
.news-list a:hover .t{color:var(--blue);}
.news-list .arrow{color:var(--muted);}

/* ---------- 内页横幅 ---------- */
.page-hero{height:240px;background:var(--blue-dd);position:relative;display:flex;
  align-items:center;justify-content:center;color:#fff;text-align:center;overflow:hidden;}
.page-hero .ph-bg{position:absolute;inset:0;opacity:.22;background-size:cover;background-position:center;}
.page-hero h1{font-size:34px;font-weight:800;position:relative;letter-spacing:2px;}
.page-hero .crumb{position:relative;margin-top:10px;color:#cfe0f7;font-size:13.5px;}
.page-hero .crumb a{color:#cfe0f7;}
.page-hero .crumb a:hover{color:#fff;}

/* ---------- 内页布局 ---------- */
.layout{display:grid;grid-template-columns:260px 1fr;gap:40px;align-items:start;}
.side{position:sticky;top:94px;}
.side .box{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;margin-bottom:22px;}
.side .box h4{background:var(--blue);color:#fff;padding:14px 20px;font-size:16px;font-weight:700;}
.side .box ul li a{display:block;padding:12px 20px;color:var(--body);border-bottom:1px solid var(--line);font-weight:500;}
.side .box ul li:last-child a{border-bottom:0;}
.side .box ul li a:hover,.side .box ul li a.on{background:var(--blue-l);color:var(--blue);}
.side .contact-box{padding:20px;}
.side .contact-box p{margin-bottom:10px;font-size:13.5px;color:var(--body);}
.side .contact-box strong{color:var(--ink);}

.main h2.title{font-size:24px;color:var(--ink);font-weight:800;margin-bottom:6px;padding-left:14px;
  border-left:4px solid var(--blue);}
.main .title-sub{color:var(--muted);margin-bottom:26px;font-size:14px;}

/* 新闻中心标签页（公司新闻 / 行业新闻） */
.news-tabs{display:flex;gap:10px;border-bottom:2px solid var(--line);margin:-8px 0 24px;}
.news-tabs .tab-link{display:block;padding:10px 24px;font-size:15px;font-weight:600;color:var(--body);
  border-bottom:3px solid transparent;margin-bottom:-2px;cursor:pointer;transition:color .2s,border-color .2s;}
.news-tabs .tab-link:hover{color:var(--blue);}
.news-tabs .tab-link.on{color:var(--blue);border-bottom-color:var(--blue);}
.news-pane{display:none;}
.news-pane.on{display:block;}

/* 在线留言表单 */
.msg-form{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:28px;}
.msg-form .row{display:grid;grid-template-columns:1fr 1fr;gap:0 18px;}
.msg-form .field{margin-bottom:18px;}
.msg-form label{display:block;font-size:13.5px;font-weight:600;color:var(--ink);margin-bottom:6px;}
.msg-form label i{color:var(--blue);font-style:normal;margin-left:2px;}
.msg-form input,.msg-form textarea,.msg-form select{width:100%;padding:10px 14px;border:1px solid var(--line);
  border-radius:8px;font-size:14px;font-family:inherit;color:var(--ink);background:#fff;
  transition:border-color .2s,box-shadow .2s;}
.msg-form input:focus,.msg-form textarea:focus,.msg-form select:focus{outline:none;border-color:var(--blue);
  box-shadow:0 0 0 3px rgba(23,99,201,.12);}
.msg-form textarea{min-height:132px;resize:vertical;}
.msg-form .submit-btn{display:inline-block;padding:12px 42px;background:var(--blue);color:#fff;border:none;
  border-radius:8px;font-size:15px;font-weight:600;cursor:pointer;transition:background .2s;font-family:inherit;}
.msg-form .submit-btn:hover{background:var(--blue-d);}
.msg-result{display:none;margin-top:16px;padding:12px 16px;border-radius:8px;font-size:13.5px;
  background:var(--blue-l);color:var(--blue-d);border:1px solid #cfe1f8;}
.msg-tip{margin-top:14px;font-size:13px;color:var(--muted);line-height:1.7;}
@media(max-width:760px){.msg-form .row{grid-template-columns:1fr;}}

/* 产品详情 */
.prod-detail{display:grid;grid-template-columns:1fr 1fr;gap:40px;}
.prod-detail .gallery .main-img{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;height:380px;background:var(--blue-l);}
.prod-detail .gallery .main-img img{width:100%;height:100%;object-fit:cover;}
.prod-detail .info h1{font-size:26px;color:var(--ink);margin-bottom:14px;}
.prod-detail .info .lead{color:var(--body);margin-bottom:20px;}
.spec{width:100%;border-collapse:collapse;margin:18px 0;}
.spec th,.spec td{border:1px solid var(--line);padding:11px 14px;font-size:13.5px;text-align:left;}
.spec th{background:var(--blue-l);color:var(--blue-d);width:130px;font-weight:700;}
.spec td{color:var(--body);}
.article p{margin-bottom:16px;color:var(--body);text-align:justify;}
.article h3{font-size:19px;color:var(--ink);margin:24px 0 12px;font-weight:700;}
.article img{max-width:100%;border-radius:8px;margin:14px 0;}

/* 表单 */
.form-row{margin-bottom:18px;}
.form-row label{display:block;margin-bottom:7px;color:var(--ink);font-weight:600;font-size:14px;}
.form-row input,.form-row textarea{width:100%;padding:11px 14px;border:1px solid var(--line);
  border-radius:6px;font-size:14px;font-family:inherit;color:var(--ink);background:#fff;transition:border .2s;}
.form-row input:focus,.form-row textarea:focus{outline:none;border-color:var(--blue);}
.form-row textarea{min-height:130px;resize:vertical;}
.form-note{font-size:13px;color:var(--muted);margin-top:10px;}

/* ---------- 页脚 ---------- */
.footer{background:var(--blue-dd);color:#bcd2ef;font-size:13.5px;}
.footer .top{padding:54px 0 40px;}
.footer .cols{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;}
.footer h4{color:#fff;font-size:16px;margin-bottom:18px;font-weight:700;position:relative;padding-left:12px;}
.footer h4::before{content:"";position:absolute;left:0;top:3px;bottom:3px;width:3px;background:var(--blue);border-radius:2px;}
.footer .f-about p{margin-bottom:12px;line-height:1.9;}
.footer .links a{display:block;padding:5px 0;color:#bcd2ef;}
.footer .links a:hover{color:#fff;padding-left:6px;}
.footer .contact p{margin-bottom:10px;}
.footer .contact strong{color:#fff;}
.footer .bottom{border-top:1px solid rgba(255,255,255,.12);padding:18px 0;text-align:center;
  color:#8fb0dd;font-size:12.5px;}

/* ---------- 响应式 ---------- */
/* 1200px 起：导航开始渐进收缩，保持桌面单行形态 */
@media(max-width:1200px){
  .topbar .tb-left span{margin-right:16px;}
  .nav>ul>li>a{padding:0 15px;font-size:15px;}
  .logo .logo-img{height:44px;}
}
@media(max-width:1080px){
  .topbar .tb-right{display:none;}
  .topbar .tb-left span:not(:first-child){display:none;}
  .nav>ul>li>a{padding:0 12px;font-size:14.5px;}
  .logo .logo-img{height:42px;}
}
@media(max-width:980px){
  .nav>ul>li>a{padding:0 10px;font-size:14px;}
  .logo .logo-img{height:40px;}
  .prod-grid,.features{grid-template-columns:repeat(2,1fr);}
  .news-grid{grid-template-columns:repeat(2,1fr);}
  .about{grid-template-columns:1fr;gap:30px;}
  .layout{grid-template-columns:1fr;}
  .side{position:static;}
  .prod-detail{grid-template-columns:1fr;}
}
@media(max-width:760px){
  .topbar .tb-left span:not(:first-child){display:none;}
  .nav-toggle{display:block;}
  .nav{position:absolute;top:74px;left:0;right:0;background:#fff;border-bottom:1px solid var(--line);
    max-height:0;overflow:hidden;transition:max-height .3s;}
  .nav.open{max-height:80vh;overflow:auto;}
  .nav>ul{flex-direction:column;align-items:stretch;}
  .nav>ul>li>a{height:auto;line-height:normal;padding:14px 20px;border-bottom:1px solid var(--line);}
  .nav>ul>li>a::after{display:none;}
  .nav .sub{position:static;opacity:1;visibility:visible;transform:none;box-shadow:none;
    border:none;border-top:1px solid var(--line);display:none;}
  .nav>ul>li:hover .sub{display:block;}
  .hero{height:380px;}
  .hero .flexslider,.hero .slides li{height:380px;}
  .hero .slide-cap h1{font-size:30px;}
  .hero .slide-cap p{font-size:14px;}
  .section{padding:48px 0;}
  .section-head h2{font-size:26px;}
  .prod-grid,.features,.news-grid{grid-template-columns:1fr;}
  .about .stats{flex-wrap:wrap;gap:18px;}
  .footer .cols{grid-template-columns:1fr 1fr;}
}
@media(max-width:480px){
  .footer .cols{grid-template-columns:1fr;}
  .hero .slide-cap h1{font-size:24px;}
}