/* 上海翼联工贸 - 快克焊接工具设备代理站 */
:root{
  --brand:#1257a6;
  --brand-d:#0d3f79;
  --brand-l:#e8f1fb;
  --accent:#f58220;
  --accent-d:#d96a0b;
  --ink:#1d2530;
  --ink-2:#4a5568;
  --ink-3:#7b8794;
  --line:#e3e8ef;
  --bg:#ffffff;
  --bg-2:#f5f7fa;
  --radius:10px;
  --wrap:1200px;
  --shadow:0 2px 12px rgba(18,87,166,.08);
}
*{margin:0;padding:0;box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  font-family:"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  color:var(--ink);background:var(--bg);font-size:15px;line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none;transition:color .2s}
ul,ol{list-style:none}
h1,h2,h3,h4{font-weight:600;line-height:1.4}
.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 16px}

/* 顶部条 */
.topbar{background:var(--brand-d);color:#cfe0f5;font-size:13px}
.topbar-in{display:flex;flex-wrap:wrap;align-items:center;gap:10px;height:38px;overflow:hidden}
.tb-item b{color:#fff;font-weight:600}
.tb-sep{opacity:.4}
.topbar-in .tb-item:nth-child(3),.topbar-in .tb-sep:nth-child(2){margin-left:auto}

/* 头部 */
.site-header{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:60}
.header-in{display:flex;align-items:center;gap:24px;height:78px}
.logo{display:flex;align-items:center;gap:12px;flex-shrink:0}
.logo-img{width:auto;height:38px;object-fit:contain}
.logo-txt{display:flex;flex-direction:column;line-height:1.25}
.logo-txt b{font-size:17px;color:var(--brand-d);letter-spacing:.5px}
.logo-txt i{font-style:normal;font-size:12px;color:var(--ink-3)}
.nav{margin-left:auto}
.nav>ul{display:flex;align-items:center;gap:4px}
.nav>ul>li{position:relative}
.nav>ul>li>a{display:block;padding:26px 16px;font-size:15px;color:var(--ink);position:relative}
.nav>ul>li>a:hover{color:var(--brand)}
.nav>ul>li.on>a{color:var(--brand)}
.nav>ul>li.on>a::after,.nav>ul>li>a:hover::after{content:"";position:absolute;left:16px;right:16px;bottom:20px;height:2px;background:var(--accent)}
.has-sub>.sub{
  position:absolute;top:100%;left:50%;transform:translateX(-50%) translateY(8px);
  background:#fff;border:1px solid var(--line);border-top:2px solid var(--accent);
  min-width:180px;box-shadow:0 8px 24px rgba(0,0,0,.1);opacity:0;visibility:hidden;
  transition:.22s;display:grid;padding:6px 0;border-radius:0 0 8px 8px;
}
.has-sub:hover>.sub{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0)}
.has-sub>.sub a{padding:9px 18px;font-size:14px;color:var(--ink-2);white-space:nowrap}
.has-sub>.sub a:hover{background:var(--brand-l);color:var(--brand)}
.header-contact{display:flex;flex-direction:column;align-items:flex-end;line-height:1.35;flex-shrink:0}
.hc-tel{font-size:19px;font-weight:600;color:var(--accent);letter-spacing:.5px}
.hc-sub{font-size:12px;color:var(--ink-3)}
.menu-btn{display:none;flex-direction:column;gap:4px;background:none;border:0;cursor:pointer;padding:8px}
.menu-btn span{display:block;width:22px;height:2px;background:var(--ink)}

/* Hero */
.hero{position:relative;background:#0d3f79 center/cover no-repeat;color:#fff;padding:72px 0}
.hero::before{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(9,38,73,.92) 0%,rgba(9,38,73,.72) 55%,rgba(9,38,73,.45) 100%)}
.hero-in{position:relative;z-index:2}
.hero-tag{display:inline-block;background:rgba(245,130,32,.18);border:1px solid rgba(245,130,32,.6);color:#ffc489;padding:4px 14px;border-radius:20px;font-size:13px;margin-bottom:18px}
.hero h1{font-size:38px;line-height:1.35;margin-bottom:14px;font-weight:600}
.hero-sub{font-size:16px;color:#c8dcf3;margin-bottom:26px}
.hero-btns{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:34px}
.btn{display:inline-block;padding:11px 26px;border-radius:var(--radius);font-size:15px;transition:.2s;border:1px solid transparent;cursor:pointer;text-align:center}
.btn-main{background:var(--accent);color:#fff}
.btn-main:hover{background:var(--accent-d);color:#fff}
.btn-ghost{border-color:rgba(255,255,255,.6);color:#fff}
.btn-ghost:hover{background:#fff;color:var(--brand-d)}
.hero-stats{display:flex;flex-wrap:wrap;gap:40px;border-top:1px solid rgba(255,255,255,.22);padding-top:22px}
.hero-stats li{display:flex;flex-direction:column}
.hero-stats b{font-size:28px;font-weight:600;color:#fff;line-height:1.2}
.hero-stats span{font-size:13px;color:#a9c6e8}

/* 区块 */
.section{padding:64px 0}
.section:nth-of-type(even){background:var(--bg-2)}
.sec-title{text-align:center;margin-bottom:38px}
.sec-title h2{font-size:28px;margin-bottom:8px;position:relative;display:inline-block}
.sec-title h2::after{content:"";display:block;width:44px;height:3px;background:var(--accent);margin:12px auto 0}
.sec-title p{color:var(--ink-3);font-size:15px}
.sec-more{text-align:center;margin-top:32px}

/* 优势 */
.adv-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.adv-item{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px 22px;transition:.25s}
.adv-item:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--brand-l)}
.ai-ico{width:44px;height:44px;border-radius:8px;background:var(--brand-l);color:var(--brand);display:flex;align-items:center;justify-content:center;font-size:19px;font-weight:600;margin-bottom:14px}
.adv-item h3{font-size:17px;margin-bottom:8px}
.adv-item p{color:var(--ink-2);font-size:14px}

/* 类目卡 */
.cat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.cat-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px 20px;transition:.25s;display:block;position:relative;overflow:hidden}
.cat-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--brand)}
.cc-icon{width:52px;height:52px;display:flex;align-items:center;justify-content:center;margin-bottom:14px}
.cc-icon img{max-height:48px;width:auto;object-fit:contain}
.cat-card h3{font-size:17px;margin-bottom:8px}
.cat-card h3:hover{color:var(--brand)}
.cat-card p{color:var(--ink-2);font-size:13.5px;min-height:52px}
.cc-num{display:inline-block;margin-top:10px;font-size:13px;color:var(--accent);font-weight:600}

/* 产品网格 */
.pgrid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.pcard{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:.25s;display:flex;flex-direction:column}
.pcard:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--brand)}
.pc-img{height:190px;background:#fafbfc;display:flex;align-items:center;justify-content:center;padding:14px;overflow:hidden}
.pc-img img{max-height:100%;width:auto;object-fit:contain;transition:.3s}
.pcard:hover .pc-img img{transform:scale(1.05)}
.pc-body{padding:14px 16px 18px;display:flex;flex-direction:column;flex:1}
.pc-body h3{font-size:15px;margin-bottom:6px;line-height:1.45;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.pc-desc{font-size:13px;color:var(--ink-3);flex:1;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;min-height:40px}
.pc-more{font-size:13px;color:var(--brand);margin-top:8px}
.pcard:hover .pc-more{color:var(--accent)}

/* 流程 */
.flow-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.flow-item{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px 20px;position:relative}
.fi-n{font-size:30px;font-weight:600;color:var(--brand-l);line-height:1;display:block;margin-bottom:8px}
.flow-item h3{font-size:16px;margin-bottom:6px}
.flow-item p{font-size:13.5px;color:var(--ink-2)}

/* CTA */
.cta-band{background:var(--brand);color:#fff;padding:48px 0}
.cta-in{display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap}
.cta-in h2{font-size:24px;margin-bottom:6px}
.cta-in p{color:#cfe0f5;font-size:14.5px}
.cta-btns{display:flex;gap:12px;flex-wrap:wrap}

/* 页头 */
.page-head{background:var(--brand-d) center/cover no-repeat;color:#fff;padding:52px 0;position:relative}
.page-head::before{content:"";position:absolute;inset:0;background:rgba(9,38,73,.82)}
.page-head .wrap{position:relative;z-index:2}
.page-head h1{font-size:32px;margin-bottom:8px}
.page-head p{color:#c8dcf3;font-size:15px;max-width:800px}

/* 面包屑 */
.crumbs{padding:14px 0;font-size:13px;color:var(--ink-3);display:flex;flex-wrap:wrap;gap:6px;align-items:center}
.crumbs a:hover{color:var(--brand)}
.crumbs b{color:var(--brand);font-weight:500}

/* 筛选栏 */
.filter-bar{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;margin-bottom:10px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:14px 16px}
.fb-cats{display:flex;flex-wrap:wrap;gap:8px}
.fbtn{background:var(--bg-2);border:1px solid transparent;color:var(--ink-2);padding:7px 15px;border-radius:20px;font-size:14px;cursor:pointer;transition:.2s}
.fbtn:hover{background:var(--brand-l);color:var(--brand)}
.fbtn.on{background:var(--brand);color:#fff}
.fb-search{display:flex;gap:8px}
.fb-search input{height:36px;border:1px solid var(--line);border-radius:6px;padding:0 12px;font-size:14px;width:240px;outline:none;font-family:inherit}
.fb-search input:focus{border-color:var(--brand)}
.fb-search button{height:36px;padding:0 20px;background:var(--brand);color:#fff;border:0;border-radius:6px;cursor:pointer;font-size:14px;font-family:inherit}
.fb-search button:hover{background:var(--brand-d)}
.filter-count{font-size:13px;color:var(--ink-3);margin-bottom:18px}
.filter-count b{color:var(--accent)}
.no-result{text-align:center;color:var(--ink-3);padding:40px 0}

/* 类目页 */
.cat-intro{display:flex;gap:24px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;margin-bottom:36px;align-items:flex-start}
.cat-intro>img{width:64px;flex-shrink:0;margin-top:4px}
.cat-intro h2{font-size:20px;margin-bottom:8px}
.cat-intro p{color:var(--ink-2);font-size:14.5px;margin-bottom:12px}
.ci-tags{display:flex;flex-wrap:wrap;gap:8px}
.ci-tags a{background:var(--brand-l);color:var(--brand);padding:4px 12px;border-radius:4px;font-size:13px}
.sub-block{margin-bottom:40px}
.sb-head{display:flex;align-items:center;gap:12px;margin-bottom:16px;padding-left:12px;border-left:4px solid var(--accent)}
.sb-head h3{font-size:19px}
.sb-head span{font-size:13px;color:var(--ink-3)}

/* 详情页 */
.detail{padding:36px 0 56px}
.detail-in{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:start;margin-bottom:44px}
.dt-img{background:#fafbfc;border:1px solid var(--line);border-radius:var(--radius);padding:24px;display:flex;align-items:center;justify-content:center;min-height:320px}
.dt-img img{max-height:400px;width:auto;object-fit:contain}
.dt-info h1{font-size:27px;margin-bottom:10px;line-height:1.35}
.dt-desc{color:var(--ink-2);font-size:15px;margin-bottom:18px}
.dt-points{margin-bottom:18px}
.dt-points li{position:relative;padding:6px 0 6px 20px;font-size:14.5px;color:var(--ink-2);border-bottom:1px dashed var(--line)}
.dt-points li::before{content:"";position:absolute;left:4px;top:16px;width:6px;height:6px;border-radius:50%;background:var(--accent)}
.dt-meta{font-size:14px;color:var(--ink-3);margin-bottom:20px}
.dt-meta a{color:var(--brand)}
.dt-actions{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:16px}
.dt-tip{background:var(--brand-l);border-radius:8px;padding:12px 16px;font-size:13.5px;color:var(--brand-d)}
.dt-detail{border-top:1px solid var(--line);padding-top:32px}
.dt-h2{font-size:21px;margin-bottom:18px;padding-left:12px;border-left:4px solid var(--brand)}
.dt-note{margin-top:24px;font-size:13px;color:var(--ink-3);background:var(--bg-2);padding:12px 16px;border-radius:6px}

/* 富文本 */
.rich-text{font-size:15px;color:var(--ink-2);overflow-x:auto}
.rich-text p{margin:0 0 12px}
.rich-text strong{color:var(--ink);font-weight:600}
.rich-text img{max-width:100%;height:auto;margin:14px auto;border-radius:6px}
.rich-text table{width:100% !important;border-collapse:collapse;margin:14px 0;font-size:14px;background:#fff}
.spec-table td,.spec-table th{border:1px solid var(--line);padding:9px 12px;text-align:left;vertical-align:middle;word-break:break-word}
.spec-table tr:first-child td{background:var(--brand-l);font-weight:600;color:var(--brand-d)}
.rich-text ul{padding-left:22px;margin:0 0 12px}
.rich-text ul li{list-style:disc;margin-bottom:4px}

/* 关于 */
.about-in{display:grid;grid-template-columns:1fr 320px;gap:40px;align-items:start}
.ab-text h2{font-size:22px;margin:0 0 14px;padding-left:12px;border-left:4px solid var(--brand)}
.ab-text p{color:var(--ink-2);margin-bottom:14px}
.ab-list{margin:8px 0 24px}
.ab-list li{padding:8px 0 8px 22px;position:relative;border-bottom:1px dashed var(--line);color:var(--ink-2);font-size:14.5px}
.ab-list li::before{content:"";position:absolute;left:4px;top:17px;width:6px;height:6px;border-radius:50%;background:var(--accent)}
.ab-card{background:var(--bg-2);border-radius:var(--radius);padding:24px;position:sticky;top:100px}
.ab-card h3{font-size:18px;margin-bottom:14px;padding-bottom:10px;border-bottom:1px solid var(--line)}
.ab-card p{font-size:14px;color:var(--ink-2);margin-bottom:8px}
.ab-card .btn{display:block;margin-top:16px}

/* 服务 */
.svc-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.svc-item{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px 22px;transition:.25s}
.svc-item:hover{border-color:var(--brand);box-shadow:var(--shadow)}
.svc-item h3{font-size:17px;margin-bottom:8px;color:var(--brand-d)}
.svc-item p{font-size:14px;color:var(--ink-2)}
.faq{margin-top:20px}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:18px 22px;margin-bottom:12px}
.faq-item h4{font-size:16px;margin-bottom:6px;color:var(--brand-d)}
.faq-item p{font-size:14px;color:var(--ink-2)}

/* 联系 */
.contact-in{display:grid;grid-template-columns:380px 1fr;gap:40px;align-items:start}
.ct-info h2{font-size:22px;margin-bottom:4px}
.ct-role{color:var(--accent);font-size:14px;margin-bottom:18px}
.ct-list li{display:flex;gap:14px;padding:10px 0;border-bottom:1px dashed var(--line);font-size:14.5px}
.ct-list li span{color:var(--ink-3);flex-shrink:0;width:44px}
.ct-list li p{color:var(--ink)}
.ct-list a{color:var(--brand)}
.ct-wechat,.ct-map{margin-top:24px}
.ct-wechat h3,.ct-map h3{font-size:17px;margin-bottom:12px}
.qr-box{width:150px;height:150px;border:1px solid var(--line);border-radius:8px;display:flex;align-items:center;justify-content:center;background:#fff;color:var(--ink-3);font-size:14px;text-align:center;line-height:1.7}
.qr-box.big{width:180px;height:180px}
.qr-tip,.ct-wechat p{font-size:13px;color:var(--ink-3);margin-top:8px}
.map-box{border:1px solid var(--line);border-radius:8px;padding:20px;background:#fff}
.map-box p{font-size:14px;color:var(--ink-2);margin-bottom:6px}
.map-box span{font-size:12.5px;color:var(--ink-3)}
.ct-form{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px}
.ct-form h2{font-size:21px;margin-bottom:6px}
.ct-form>p{font-size:14px;color:var(--ink-3);margin-bottom:20px}
.ct-form label{display:block;margin-bottom:14px;font-size:14px;color:var(--ink-2)}
.ct-form input,.ct-form textarea{width:100%;margin-top:6px;border:1px solid var(--line);border-radius:6px;padding:10px 12px;font-size:14px;font-family:inherit;outline:none;background:#fff;color:var(--ink)}
.ct-form input:focus,.ct-form textarea:focus{border-color:var(--brand)}
.ct-form textarea{resize:vertical}
.form-tip{font-size:12.5px;color:var(--ink-3);margin-top:12px;line-height:1.6}
.form-ok{font-size:13.5px;color:#0f6e56;background:#e7f6f0;border-radius:6px;padding:10px 14px;margin-top:12px}

/* 页脚 */
.site-footer{background:#12233a;color:#a8b8cc;font-size:14px;margin-top:0}
.footer-in{display:grid;grid-template-columns:160px 160px 1fr 200px;gap:32px;padding:52px 0 36px}
.f-col h4{color:#fff;font-size:16px;margin-bottom:16px;font-weight:600}
.f-col ul li{margin-bottom:9px}
.f-col a:hover{color:#fff}
.f-contact p{margin-bottom:7px;line-height:1.7}
.f-contact a{color:#8fc0ee}
.f-qr .qr-box{background:#fff;border-color:#2c3e56}
.copyright{border-top:1px solid #22344e;padding:18px 0;font-size:13px;color:#7d8ea3}
.cp-note{margin-top:4px;color:#61748c;font-size:12.5px}

/* 侧边联系条 */
.side-contact{position:fixed;right:12px;top:50%;transform:translateY(-50%);z-index:50;display:flex;flex-direction:column;gap:6px}
.sc-item{width:48px;height:48px;background:#fff;border:1px solid var(--line);border-radius:8px;display:flex;align-items:center;justify-content:center;font-size:12px;color:var(--ink-2);box-shadow:0 2px 8px rgba(0,0,0,.08);transition:.2s}
.sc-item:hover{background:var(--brand);color:#fff;border-color:var(--brand)}
.mobile-bar{display:none}

/* 响应式 */
@media (max-width:1100px){
  .cat-grid,.adv-grid,.flow-grid{grid-template-columns:repeat(2,1fr)}
  .pgrid{grid-template-columns:repeat(3,1fr)}
  .footer-in{grid-template-columns:1fr 1fr;gap:28px}
  .about-in{grid-template-columns:1fr}
  .ab-card{position:static}
  .contact-in{grid-template-columns:1fr}
}
@media (max-width:860px){
  .header-contact,.topbar-in .tb-item:nth-child(1),.topbar-in .tb-sep:nth-child(2){display:none}
  .menu-btn{display:flex;margin-left:auto}
  .nav{position:fixed;top:78px;left:0;right:0;background:#fff;border-bottom:1px solid var(--line);
       box-shadow:0 8px 20px rgba(0,0,0,.1);max-height:0;overflow:hidden;transition:.28s;margin:0}
  body.nav-open .nav{max-height:70vh;overflow-y:auto}
  .nav>ul{flex-direction:column;align-items:stretch;gap:0}
  .nav>ul>li>a{padding:14px 20px;border-bottom:1px solid var(--line)}
  .nav>ul>li.on>a::after,.nav>ul>li>a:hover::after{display:none}
  .has-sub>.sub{position:static;transform:none;opacity:1;visibility:visible;box-shadow:none;border:0;border-left:2px solid var(--accent);display:none;padding:0}
  body.nav-open .has-sub>.sub{display:grid}
  .has-sub>.sub a{padding:10px 34px}
  .hero{padding:52px 0}
  .hero h1{font-size:27px}
  .hero-stats{gap:24px}
  .hero-stats b{font-size:22px}
  .section{padding:44px 0}
  .sec-title h2{font-size:23px}
  .pgrid{grid-template-columns:repeat(2,1fr)}
  .detail-in{grid-template-columns:1fr;gap:24px}
  .svc-grid{grid-template-columns:1fr}
  .cat-intro{flex-direction:column;gap:14px}
  .side-contact{display:none}
  .mobile-bar{display:flex;position:fixed;bottom:0;left:0;right:0;z-index:70;background:#fff;border-top:1px solid var(--line);box-shadow:0 -2px 10px rgba(0,0,0,.06)}
  .mobile-bar a{flex:1;text-align:center;padding:13px 0;font-size:14px;color:var(--brand-d);border-right:1px solid var(--line)}
  .mobile-bar a:last-child{border-right:0;background:var(--accent);color:#fff}
  body{padding-bottom:52px}
  .footer-in{grid-template-columns:1fr;padding:36px 0 24px}
  .rich-text table{font-size:13px}
  .spec-table td,.spec-table th{padding:7px 8px}
}
@media (max-width:520px){
  .pgrid{grid-template-columns:1fr}
  .cat-grid,.adv-grid,.flow-grid{grid-template-columns:1fr}
  .hero h1{font-size:22px}
  .cta-in{flex-direction:column;align-items:flex-start}
  .fb-search input{width:100%}
  .fb-search{width:100%}
  .pc-img{height:170px}
}