/* ============================================================
   DEHN 防雷产品选型中心 — 全站样式
   主色 DEHN 红 #E30613 / 黄线金黄 #F5A800 / 外部防雷深蓝 #1F3A5F
   ============================================================ */
:root{
  --red:#E30613;
  --red-dark:#B00410;
  --red-soft:#FDECEE;
  --yellow:#F6B600;
  --yellow-dark:#C79400;
  --yellow-soft:#FEF7DC;
  --blue:#008CD5;
  --blue-dark:#0070AA;
  --blue-soft:#E5F4FB;
  --ink:#2B2F33;
  --muted:#6B7280;
  --line:#E5E7EB;
  --bg:#FFFFFF;
  --bg-soft:#F6F7F8;
  --radius:10px;
  --shadow:0 2px 10px rgba(20,24,28,.07);
  --shadow-lg:0 8px 28px rgba(20,24,28,.13);
  --font:"Noto Sans SC","Microsoft YaHei","PingFang SC",system-ui,-apple-system,"Segoe UI",sans-serif;
}
/* 产品线主题联动：选中某产品线后，整页主色调切换（按钮/选中态/焦点框/卡片顶条均跟随） */
body.theme-yellow{--red:#F6B600;--red-dark:#C79400;--red-soft:#FEF7DC}
body.theme-blue{--red:#008CD5;--red-dark:#0070AA;--red-soft:#E5F4FB}
/* 黄色主题对比度修正：品牌黄偏亮，黄底一律配深色字，黄色文字改用深一号黄 */
body.theme-yellow .btn{color:#332700}
body.theme-yellow .btn:hover{background:var(--red-dark);color:#fff}
body.theme-yellow .btn-outline{color:#8A6800;border-color:#D9A800;background:#fff}
body.theme-yellow .btn-outline:hover{background:var(--red-soft);color:#7A5C00}
body.theme-yellow .main-nav a.active{color:#8A6800}
body.theme-yellow .tree-all.sel,body.theme-yellow .tree-line-head.sel,
body.theme-yellow .tree-cat-head.sel,body.theme-yellow .tree-ser.sel{color:#8A6800}
body.theme-yellow .filter-path .clear{color:#8A6800}
body.theme-yellow .cart-badge{color:#332700}
body.theme-yellow .empty{color:#6B7280}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font);color:var(--ink);background:var(--bg);line-height:1.65;font-size:15px}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.wrap{max-width:1180px;margin:0 auto;padding:0 20px}
.muted{color:var(--muted)}
.small{font-size:13px}
.section{padding:56px 0}
.section.soft{background:var(--bg-soft)}
.section-title{font-size:26px;font-weight:700;margin-bottom:6px}
.section-sub{color:var(--muted);margin-bottom:28px}
.tag{display:inline-block;padding:2px 10px;border-radius:999px;font-size:12px;font-weight:600;letter-spacing:.02em}
.tag-red{background:var(--red-soft);color:var(--red);border:1px solid #F5C2C7}
.tag-yellow{background:var(--yellow-soft);color:var(--yellow-dark);border:1px solid #F0DDA8}
.tag-blue{background:var(--blue-soft);color:var(--blue);border:1px solid #C7D6E8}
.tag-gray{background:#EEF0F2;color:var(--muted);border:1px solid var(--line)}

/* ---------- 按钮 ---------- */
.btn{display:inline-flex;align-items:center;gap:6px;padding:10px 20px;border-radius:8px;border:1px solid transparent;
  font-size:14px;font-weight:600;cursor:pointer;background:var(--red);color:#fff;transition:all .18s ease;font-family:var(--font)}
.btn:hover{background:var(--red-dark);transform:translateY(-1px)}
.btn-outline{background:#fff;color:var(--red);border-color:var(--red)}
.btn-outline:hover{background:var(--red-soft)}
.btn-ghost{background:#fff;color:var(--ink);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--ink)}
.btn-sm{padding:6px 14px;font-size:13px;border-radius:6px}
.btn-block{width:100%;justify-content:center}
.btn-lg{padding:14px 30px;font-size:16px}
.btn[disabled]{opacity:.5;cursor:not-allowed;transform:none}

/* ---------- 头部 ---------- */
.topbar{background:var(--ink);color:#cfd4da;font-size:12.5px}
.topbar .wrap{display:flex;justify-content:space-between;padding-top:6px;padding-bottom:6px}
.topbar a:hover{color:#fff}
.site-header{position:sticky;top:0;z-index:60;background:#fff;border-bottom:1px solid var(--line);box-shadow:0 1px 6px rgba(0,0,0,.04)}
.header-inner{display:flex;align-items:center;gap:26px;height:64px}
.logo{display:flex;align-items:center;gap:10px;flex-shrink:0}
.logo-img{height:30px;width:auto;display:block}
.logo-sub{font-size:13px;color:var(--ink);font-weight:600;border-left:2px solid var(--line);padding-left:10px}
.main-nav{display:flex;align-items:center;gap:4px;margin-left:auto}
.main-nav a{padding:8px 13px;border-radius:7px;font-size:14.5px;font-weight:500;color:var(--ink);position:relative}
.main-nav a:hover{background:var(--bg-soft);color:var(--red)}
.main-nav a.active{color:var(--red);font-weight:700}
.main-nav a.active::after{content:"";position:absolute;left:13px;right:13px;bottom:2px;height:2.5px;background:var(--red);border-radius:2px}
.cart-link{display:flex;align-items:center;gap:6px}
.cart-badge{display:inline-flex;align-items:center;justify-content:center;min-width:19px;height:19px;padding:0 5px;
  background:var(--red);color:#fff;border-radius:999px;font-size:11.5px;font-weight:700}
.nav-toggle{display:none;background:none;border:1px solid var(--line);border-radius:7px;font-size:20px;padding:4px 10px;cursor:pointer;margin-left:auto}

/* ---------- Hero ---------- */
.hero{background:linear-gradient(115deg,#2B2F33 0%,#3A3F45 55%,#4A2023 100%);color:#fff;padding:74px 0 84px;position:relative;overflow:hidden}
.hero::after{content:"";position:absolute;right:-120px;top:-120px;width:420px;height:420px;border-radius:50%;
  background:radial-gradient(circle,rgba(227,6,19,.35),transparent 70%)}
.hero-kicker{color:var(--yellow);font-weight:700;letter-spacing:.14em;font-size:13px;margin-bottom:14px}
.hero h1{font-size:38px;line-height:1.3;max-width:760px;margin-bottom:14px}
.hero p{color:#C9CED4;max-width:640px;margin-bottom:30px;font-size:16px}
.hero-search{display:flex;max-width:640px;background:#fff;border-radius:10px;overflow:hidden;box-shadow:var(--shadow-lg);position:relative;z-index:2}
.hero-search input{flex:1;border:none;outline:none;padding:15px 18px;font-size:15px;font-family:var(--font)}
.hero-search button{border:none;background:var(--red);color:#fff;padding:0 30px;font-size:15px;font-weight:700;cursor:pointer;font-family:var(--font)}
.hero-search button:hover{background:var(--red-dark)}
.hero-hint{color:#9AA1A9;font-size:12.5px;margin-top:10px}

/* ---------- 入口卡片 ---------- */
.entry-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.entry-card{border-radius:var(--radius);padding:28px 26px;color:#fff;position:relative;overflow:hidden;min-height:190px;
  display:flex;flex-direction:column;justify-content:flex-end;transition:transform .2s ease,box-shadow .2s ease;box-shadow:var(--shadow)}
.entry-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.entry-card h3{font-size:21px;margin-bottom:6px}
.entry-card h3 .t1{display:block;line-height:1.35}
.entry-card h3 .t2{display:block;font-size:14px;font-weight:600;opacity:.85;letter-spacing:.04em;margin-top:2px;min-height:21px}
.entry-card p{font-size:13.5px;opacity:.92;margin-bottom:12px}
.entry-card .go{font-size:13px;font-weight:700}
.entry-red{background:linear-gradient(135deg,#E30613,#8F030D)}
.entry-yellow{background:linear-gradient(135deg,#F6B600,#E3A800);color:#332700}
.entry-yellow p{opacity:.88}
.entry-yellow .t2{opacity:.72}
.entry-blue{background:linear-gradient(135deg,#008CD5,#006BA3)}
.entry-icon{position:absolute;top:18px;right:20px;font-size:44px;opacity:.28;font-weight:800}

/* ---------- 通用卡片 / 网格 ---------- */
.grid{display:grid;gap:20px}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow);
  transition:transform .18s ease,box-shadow .18s ease}
.card:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg)}
.card h3{font-size:16.5px;margin-bottom:4px}

/* 行业图标网格 */
.industry-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:14px}
.industry-item{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:20px 10px;text-align:center;transition:all .18s}
.industry-item:hover{border-color:var(--red);color:var(--red);transform:translateY(-2px)}
.industry-item .ico{font-size:26px;margin-bottom:8px}
.industry-item .name{font-size:13.5px;font-weight:600}

/* 热门型号横滑 */
.hscroll{display:flex;gap:16px;overflow-x:auto;padding:6px 2px 16px;scroll-snap-type:x mandatory}
.hscroll::-webkit-scrollbar{height:8px}
.hscroll::-webkit-scrollbar-thumb{background:#d3d7db;border-radius:8px}
.pcard{flex:0 0 240px;scroll-snap-align:start;background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:18px;display:flex;flex-direction:column;gap:6px;box-shadow:var(--shadow)}
.pcard .model{font-weight:700;font-size:15px}
.pcard .pn{font-size:12px;color:var(--muted)}
.pcard .kp{font-size:13px;color:var(--ink);background:var(--bg-soft);border-radius:6px;padding:4px 8px;display:inline-block}
.pcard .ops{display:flex;gap:8px;margin-top:auto;padding-top:10px}

/* ---------- 增强产品卡（产品中心） ---------- */
.pcard-rich{gap:10px;padding:20px;border-top:3px solid var(--red);position:relative}
.pcard-rich.line-yellow{border-top-color:#F6B600}
.pcard-rich.line-blue{border-top-color:#008CD5}
/* 缩略图：悬浮于标题区右侧，不改变卡片尺寸 */
.pcard-rich.has-thumb .model,.pcard-rich.has-thumb .use{padding-right:78px}
.pthumb{position:absolute;right:16px;top:46px;width:66px;height:66px;display:flex;align-items:center;justify-content:center;
  background:#fff;border:1px solid var(--line);border-radius:8px;overflow:hidden}
.pthumb img{max-width:100%;max-height:100%;object-fit:contain}
.pthumb:hover{border-color:var(--red)}
.pcard-top{display:flex;align-items:center;justify-content:space-between;gap:10px}
.pcard-pn{font-size:12px;font-weight:700;letter-spacing:.08em;color:var(--muted);text-transform:uppercase}
.line-badge{flex-shrink:0;padding:2px 8px;font-size:11px;font-weight:800;letter-spacing:.06em;border-radius:3px}
.lb-red{background:#FDECEE;color:#E30613}
.lb-yellow{background:var(--yellow-soft);color:var(--yellow-dark)}
.lb-blue{background:var(--blue-soft);color:var(--blue)}
.pcard-rich .model{font-size:18px;font-weight:800;line-height:1.3}
.pcard-rich .use{font-size:13px;color:var(--muted);line-height:1.5;min-height:20px}
.spec-grid{display:grid;grid-template-columns:1fr 1fr;border:1px solid var(--line);border-radius:8px;overflow:hidden}
.spec-cell{padding:8px 12px;border-bottom:1px solid var(--line);display:flex;flex-direction:column;gap:1px}
.spec-cell:nth-child(odd){border-right:1px solid var(--line)}
.spec-cell:nth-last-child(-n+2){border-bottom:none}
.spec-cell:only-child,.spec-cell:nth-last-child(2):nth-child(odd){border-bottom:none}
.spec-cell .k{font-size:11px;color:var(--muted)}
.spec-cell .v{font-size:13px;font-weight:700;line-height:1.4}
.spec-cell .v.na{color:#C3C9CF;font-weight:400}
.ptags{display:flex;gap:6px;flex-wrap:wrap}
.ptag{padding:2px 9px;border:1px solid var(--line);border-radius:4px;font-size:11.5px;color:var(--muted);background:var(--bg-soft)}
.pcard-rich .ops{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.pcard-rich .ops .btn{justify-content:center;text-align:center;white-space:nowrap;padding:6px 8px;font-size:12.5px}
.pcard-rich .ops .btn.added{background:var(--ink);border-color:var(--ink);color:#fff;cursor:default}
.pcard-rich .ops .btn.added:hover{background:var(--ink);transform:none}
/* 全局：任何"已加入"状态的按钮（含详情页报价条、方案页小按钮）统一深色底白字 */
.btn.added{background:var(--ink)!important;border-color:var(--ink)!important;color:#fff!important;cursor:default}
.btn.added:hover{background:var(--ink)!important;transform:none}
/* 横滑场景（首页热门 / 详情页配套推荐）中的增强卡 */
.hscroll .pcard-rich{flex:0 0 300px}

/* 品牌背书区（总部大楼底图） */
.brand-hero{position:relative;color:#fff;overflow:hidden;background:var(--ink)}
.brand-bg{position:absolute;inset:0;background:url("../assets/dehn-hq.jpg") center 30%/cover no-repeat}
.brand-hero::after{content:"";position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(20,23,27,.94) 0%,rgba(20,23,27,.82) 42%,rgba(20,23,27,.38) 75%,rgba(20,23,27,.55) 100%)}
.brand-hero-inner{position:relative;z-index:2;padding-top:64px;padding-bottom:40px}
.brand-kicker{color:var(--yellow);font-weight:700;letter-spacing:.14em;font-size:13px;margin-bottom:14px}
.brand-hero h2{font-size:32px;line-height:1.35;margin-bottom:16px;max-width:640px}
.brand-lead{color:#D4D9DE;max-width:600px;font-size:15px;line-height:1.9;margin-bottom:34px}
.brand-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:26px 40px;max-width:860px;
  border-top:1px solid rgba(255,255,255,.18);padding-top:28px}
.brand-num{font-size:32px;font-weight:800;color:var(--yellow)}
.brand-label{font-size:13px;color:#C9CED4;margin-top:2px}
.brand-src{margin-top:26px;font-size:12px;color:#9aa1a9}

/* 页脚企业微信 */
.footer-qr{display:flex;align-items:center;gap:10px;margin-top:12px}
.footer-qr img{width:88px;height:88px;border-radius:8px;background:#fff;padding:4px}
.footer-qr span{font-size:12.5px;color:#AEB5BD;line-height:1.6}

/* 关于页企业微信卡 */
.wechat-card{display:flex;align-items:center;gap:24px;margin-top:22px;padding:24px 28px;border-left:4px solid #07C160}
.wechat-card img{width:120px;height:120px;border-radius:8px;flex-shrink:0}
.wechat-card h3{font-size:17px}

/* 询盘页企业微信 */
.inq-qr{display:flex;align-items:center;gap:14px;margin-top:20px;padding-top:18px;border-top:1px dashed var(--line)}
.inq-qr img{width:84px;height:84px;border-radius:8px;border:1px solid var(--line);flex-shrink:0}
.inq-qr b{font-size:14px}

/* ---------- 页脚 ---------- */
.site-footer{background:#22262B;color:#AEB5BD;margin-top:60px}
.brand-hero + .site-footer{margin-top:0}
.footer-grid{display:grid;grid-template-columns:minmax(0,340px) max-content max-content max-content;justify-content:space-between;gap:40px;padding:44px 0 30px}
.footer-cart{display:inline-flex !important;align-items:center;gap:8px;font-weight:600;color:#fff !important}
.footer-friend a{display:inline;padding:0;text-decoration:underline}
.footer-cart .cart-badge{position:static;transform:none}
.site-footer h4{color:#fff;font-size:15px;margin-bottom:12px}
.site-footer a{display:block;padding:3px 0;font-size:13.5px}
.site-footer a:hover{color:#fff}
.footer-bottom{border-top:1px solid #3A3F45;padding:16px 0;font-size:12.5px;color:#8b929b;text-align:center}

/* ---------- Toast ---------- */
#toastBox{position:fixed;left:50%;bottom:36px;transform:translateX(-50%);z-index:999;display:flex;flex-direction:column;gap:8px;align-items:center;pointer-events:none}
.toast{background:var(--ink);color:#fff;padding:10px 22px;border-radius:8px;font-size:14px;box-shadow:var(--shadow-lg);
  animation:toastIn .25s ease;max-width:86vw;text-align:center}
.toast.ok{background:#157347}
.toast.warn{background:#8a6d00}
@keyframes toastIn{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}

/* ---------- 选型向导 ---------- */
.wizard{max-width:920px;margin:0 auto}
.progress{display:flex;align-items:center;gap:0;margin:34px 0 30px}
.progress .step{flex:1;text-align:center;position:relative;font-size:13px;color:var(--muted)}
.progress .step::before{content:attr(data-n);display:flex;align-items:center;justify-content:center;width:30px;height:30px;
  border-radius:50%;background:#E5E7EB;color:var(--muted);font-weight:700;margin:0 auto 6px;position:relative;z-index:2;transition:all .25s}
.progress .step::after{content:"";position:absolute;top:15px;left:-50%;width:100%;height:3px;background:#E5E7EB;z-index:1}
.progress .step:first-child::after{display:none}
.progress .step.done::before,.progress .step.done::after{background:var(--red);color:#fff}
.progress .step.cur::before{background:var(--red);color:#fff;box-shadow:0 0 0 5px var(--red-soft)}
.progress .step.cur{color:var(--red);font-weight:700}
.wizard-panel{background:#fff;border:1px solid var(--line);border-radius:14px;padding:34px;box-shadow:var(--shadow);
  animation:fadeSlide .3s ease}
@keyframes fadeSlide{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}
.wizard-title{font-size:21px;font-weight:700;margin-bottom:6px}
.wizard-desc{color:var(--muted);margin-bottom:24px;font-size:14px}
.opt-grid{display:grid;gap:14px}
.opt-grid.c2{grid-template-columns:1fr 1fr}
.opt-grid.c4{grid-template-columns:repeat(4,1fr)}
.opt{position:relative;border:2px solid var(--line);border-radius:10px;padding:18px;cursor:pointer;transition:all .18s;background:#fff;text-align:left;font-family:var(--font)}
.opt-count{position:absolute;right:12px;top:12px;font-size:11.5px;font-weight:600;color:var(--red);background:var(--red-soft);padding:2px 9px;border-radius:10px;white-space:nowrap}
.opt-count.zero{color:var(--muted);background:var(--bg-soft);font-weight:500}
.opt:hover{border-color:#c3c9cf;transform:translateY(-2px)}
.opt.sel{border-color:var(--red);background:var(--red-soft)}
.opt .t{font-weight:700;font-size:15.5px;margin-bottom:4px}
.opt .d{font-size:12.5px;color:var(--muted);line-height:1.5}
.opt .lv{display:inline-block;margin-top:8px}
.opt-yellow .opt.sel{border-color:var(--yellow);background:var(--yellow-soft)}
.opt-blue .opt:hover{border-color:var(--blue)}
.opt-blue .opt.sel{border-color:var(--blue);background:var(--blue-soft)}
.wizard-ops{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-top:28px}
.opt-group{margin-bottom:18px}
.opt-group-label{font-size:13px;font-weight:700;color:var(--muted);margin-bottom:8px}
.sys-diagram{display:flex;gap:6px;margin-top:10px}
.sys-diagram span{width:26px;height:8px;border-radius:3px;background:var(--line)}
.sys-diagram .l{background:#8B929B}.sys-diagram .n{background:#3B82F6}.sys-diagram .pe{background:#22A06B}

/* 结果卡 */
.result-group{margin-bottom:30px}
.result-group h3{font-size:16px;margin-bottom:4px}
.result-note{font-size:13px;color:var(--muted);margin-bottom:14px}
.rcard{border:1px solid var(--line);border-left:4px solid var(--red);border-radius:10px;padding:18px 20px;margin-bottom:14px;background:#fff;box-shadow:var(--shadow);position:relative}
.rcard.has-thumb .head{padding-right:88px}
.rthumb{position:absolute;right:16px;top:16px;width:72px;height:72px;display:flex;align-items:center;justify-content:center;
  background:#fff;border:1px solid var(--line);border-radius:8px;overflow:hidden}
.rthumb img{max-width:100%;max-height:100%;object-fit:contain}
.rthumb:hover{border-color:var(--red)}
.result-grid{margin-top:6px}
.rcard .head{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-bottom:10px}
.rcard .model{font-size:17px;font-weight:800}
.rcard .params{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:8px 18px;margin-bottom:12px}
.rcard .params .k{font-size:11.5px;color:var(--muted)}
.rcard .params .v{font-size:13.5px;font-weight:600}
.rcard .ops{display:flex;gap:10px;flex-wrap:wrap}
table.cmp{width:100%;border-collapse:collapse;font-size:13.5px;margin:8px 0 20px;background:#fff}
table.cmp th,table.cmp td{border:1px solid var(--line);padding:9px 12px;text-align:left}
table.cmp th{background:var(--bg-soft);font-weight:700;white-space:nowrap}
table.cmp td:first-child{color:var(--muted);white-space:nowrap}

/* ---------- 产品列表 ---------- */
.list-layout{display:grid;grid-template-columns:230px 1fr;gap:26px;margin-top:26px}
.filter-box{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:18px;position:sticky;top:84px;align-self:start;max-height:calc(100vh - 110px);overflow:auto}
.filter-box h4{font-size:14px;margin:14px 0 8px;padding-top:12px;border-top:1px solid var(--line)}
.filter-box h4:first-child{margin-top:0;padding-top:0;border-top:none}
.filter-box label{display:flex;align-items:center;gap:7px;font-size:13.5px;padding:3px 0;cursor:pointer}
.list-toolbar{display:flex;gap:12px;align-items:center;margin-bottom:16px;flex-wrap:wrap}
.list-toolbar input[type=search]{flex:1;min-width:220px;padding:10px 14px;border:1px solid var(--line);border-radius:8px;font-size:14px;font-family:var(--font);outline:none}
.list-toolbar input[type=search]:focus{border-color:var(--red)}
.prod-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.prod-grid .pcard{flex:none}
.load-more{display:block;margin:26px auto 0}
.empty{padding:60px 20px;text-align:center;color:var(--muted);background:var(--bg-soft);border-radius:var(--radius)}

/* ---------- 产品详情 ---------- */
.crumbs{font-size:13px;color:var(--muted);margin:22px 0 18px}
.crumbs a:hover{color:var(--red)}
.detail-head{display:flex;align-items:flex-start;gap:16px;flex-wrap:wrap;margin-bottom:8px}
.detail-head h1{font-size:27px}
.detail-layout{display:grid;grid-template-columns:1.05fr 1fr;gap:30px;margin:24px 0 40px}
.gallery{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:var(--bg-soft)}
.gallery-main{height:300px;display:flex;align-items:center;justify-content:center;color:#B6BCC2;font-size:15px;
  background:repeating-linear-gradient(45deg,#f2f3f4,#f2f3f4 14px,#eceef0 14px,#eceef0 28px)}
.gallery-thumbs{display:flex;gap:10px;padding:12px;background:#fff;border-top:1px solid var(--line)}
.gal-thumb{flex:0 0 auto;width:88px;cursor:pointer;text-align:center;border:none;background:none;padding:0}
.gal-thumb .gt-img{width:88px;height:58px;border:1.5px solid var(--line);border-radius:8px;background:#fff;display:flex;align-items:center;justify-content:center;overflow:hidden;transition:border-color .15s,box-shadow .15s}
.gal-thumb .gt-img img{max-width:100%;max-height:100%;object-fit:contain}
.gal-thumb:hover .gt-img{border-color:#9aa2ab}
.gal-thumb.active .gt-img{border-color:var(--red);box-shadow:0 0 0 2px rgba(215,0,15,.12)}
.gal-thumb .gt-label{font-size:11px;color:var(--muted);margin-top:5px;line-height:1.3}
.gal-thumb.active .gt-label{color:var(--red);font-weight:600}
.model3d{margin-top:18px;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;position:relative}
model-viewer{width:100%;height:280px;background:var(--blue-soft)}
.model-fallback{height:280px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;
  background:var(--blue-soft);color:var(--blue)}
.model-fallback .big{font-size:34px}
.model-fallback[hidden]{display:none}
.spec-table{width:100%;border-collapse:collapse;font-size:14px}
.spec-table th,.spec-table td{border:1px solid var(--line);padding:10px 14px;text-align:left}
.spec-table th{width:170px;background:var(--bg-soft);font-weight:600;color:#454b52}
.dl-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(170px,1fr));gap:12px}
.dl-item{display:flex;align-items:center;gap:10px;border:1px solid var(--line);border-radius:8px;padding:12px 14px;background:#fff;cursor:pointer;transition:all .15s}
.dl-item:hover{border-color:var(--red);color:var(--red)}
.dl-item .fi{font-size:20px}
.dl-item .ft{font-size:13px;font-weight:600}
.dl-item .fs{font-size:11px;color:var(--muted)}
.buy-box{background:var(--bg-soft);border-radius:var(--radius);padding:20px;display:flex;gap:14px;align-items:center;flex-wrap:wrap;margin:10px 0 30px}
.buy-box .price-note{font-size:13px;color:var(--muted)}

/* ---------- 解决方案 ---------- */
.sol-group-title{display:flex;align-items:center;gap:12px;margin:34px 0 18px;font-size:20px}
.sol-group-title::after{content:"";flex:1;height:1px;background:var(--line)}
.sol-card{display:flex;flex-direction:column;overflow:hidden;padding:0}
.sol-visual{height:120px;display:flex;align-items:center;justify-content:center;font-size:38px;color:#fff}
.sol-body{padding:18px 20px;display:flex;flex-direction:column;gap:10px;flex:1}
.sol-body h3{font-size:16.5px}
.sol-pain{font-size:13px;color:var(--muted)}
.sol-tags{display:flex;gap:6px;flex-wrap:wrap}
.sol-prods{border-top:1px dashed var(--line);padding-top:10px;display:flex;flex-direction:column;gap:8px}
.sol-prod{display:flex;align-items:center;gap:8px;font-size:13px}
.sol-prod .m{font-weight:600;flex:1}
.sol-prod a{color:var(--red);font-size:12px}

/* ---------- 文库 / 新闻 ---------- */
.chips{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:22px}
.chip{padding:7px 16px;border:1px solid var(--line);border-radius:999px;background:#fff;font-size:13.5px;cursor:pointer;font-family:var(--font)}
.chip.active{background:var(--red);color:#fff;border-color:var(--red)}
.doc-list{display:flex;flex-direction:column;gap:10px}
.doc-item{display:flex;align-items:center;gap:14px;border:1px solid var(--line);border-radius:8px;padding:14px 18px;background:#fff}
.doc-item:hover{border-color:var(--red)}
.doc-item .fi{font-size:22px}
.doc-item .t{flex:1;font-size:14.5px;font-weight:600}
.doc-item .meta{font-size:12px;color:var(--muted)}
.doc-item .doc-ops{display:flex;gap:8px;flex-shrink:0}
.chip .dot{display:inline-block;vertical-align:-1px;margin-right:2px}
.lib-toolbar{display:flex;gap:12px;margin-bottom:16px;flex-wrap:wrap}
.lib-toolbar input[type=search]{flex:1;min-width:260px;padding:11px 16px;border:1px solid var(--line);border-radius:8px;font-size:14px;font-family:var(--font)}
.lib-toolbar select{padding:11px 14px;border:1px solid var(--line);border-radius:8px;font-size:14px;font-family:var(--font);background:#fff;max-width:320px}
@media (max-width:680px){.doc-item{flex-wrap:wrap}.doc-item .doc-ops{margin-left:36px}}
.news-layout{display:grid;grid-template-columns:1fr 240px;gap:30px;margin-top:26px}
.news-card{display:flex;gap:18px;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:#fff;margin-bottom:16px;box-shadow:var(--shadow)}
.news-thumb{flex:0 0 180px;display:flex;align-items:center;justify-content:center;color:#fff;font-size:30px;min-height:130px}
.news-body{padding:16px 18px}
.news-body h3{font-size:16px;margin-bottom:6px}
.news-body p{font-size:13px;color:var(--muted)}
.news-date{font-size:12px;color:var(--muted);margin-top:10px}
.side-box{border:1px solid var(--line);border-radius:var(--radius);padding:18px;background:#fff;margin-bottom:18px}
.side-box h4{font-size:14.5px;margin-bottom:10px}
.side-box a{display:block;padding:6px 0;font-size:13.5px;color:var(--ink);border-bottom:1px dashed var(--line)}
.side-box a:hover{color:var(--red)}

/* ---------- 需求篮 ---------- */
.cart-table{width:100%;border-collapse:collapse;font-size:14px;background:#fff}
.cart-table th,.cart-table td{border:1px solid var(--line);padding:10px 12px;text-align:left}
.cart-table th{background:var(--bg-soft)}
.cart-table input[type=number]{width:64px;padding:5px 8px;border:1px solid var(--line);border-radius:6px;font-family:var(--font)}
.inq-layout{display:grid;grid-template-columns:1.5fr 1fr;gap:30px;margin-top:26px;align-items:start}
.form-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow)}
.form-row{margin-bottom:16px}
.form-row label{display:block;font-size:13.5px;font-weight:600;margin-bottom:6px}
.form-row label .req{color:var(--red)}
.form-row input,.form-row textarea{width:100%;padding:10px 13px;border:1px solid var(--line);border-radius:8px;font-size:14px;font-family:var(--font);outline:none}
.form-row input:focus,.form-row textarea:focus{border-color:var(--red)}
.form-note{font-size:12.5px;color:var(--muted);margin-top:12px;line-height:1.6}

/* ---------- 关于 ---------- */
.cert-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.cert-item{border:1px dashed #c3c9cf;border-radius:var(--radius);height:190px;display:flex;flex-direction:column;
  align-items:center;justify-content:center;gap:8px;color:var(--muted);background:var(--bg-soft);font-size:13px}
.cert-item .big{font-size:36px}
.contact-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.contact-card{text-align:center;padding:26px}
.contact-card .ico{font-size:26px;margin-bottom:8px}
.contact-card .v{font-weight:700;margin-top:2px}

/* ---------- 导航下拉（产品中心） ---------- */
.nav-drop{position:relative}
.nav-drop>a{display:inline-flex;align-items:center;gap:4px}
.nav-drop>a::after{content:"▾";font-size:11px;color:var(--muted)}
.nav-drop-menu{display:none;position:absolute;top:100%;left:0;min-width:270px;background:#fff;border:1px solid var(--line);
  border-radius:10px;box-shadow:var(--shadow-lg);padding:8px;z-index:90}
.nav-drop:hover .nav-drop-menu,.nav-drop:focus-within .nav-drop-menu{display:block}
.nav-drop-menu a{display:flex;align-items:center;gap:9px;padding:10px 12px;border-radius:7px;font-size:13.5px;white-space:nowrap}
.nav-drop-menu a:hover{background:var(--bg-soft);color:var(--red)}
.dot{width:10px;height:10px;border-radius:50%;flex-shrink:0}
.dot-red{background:#E30613}.dot-yellow{background:#F6B600}.dot-blue{background:#008CD5}

/* ---------- 产品分类三级树 ---------- */
.tree-all{display:flex;align-items:center;padding:7px 8px;border-radius:7px;cursor:pointer;font-size:13.5px;font-weight:700}
.tree-all:hover{background:var(--bg-soft)}
.tree-all.sel{background:var(--red-soft);color:var(--red)}
.tree-line{border-top:1px solid var(--bg-soft);margin-top:2px}
.tree-line-head{display:flex;align-items:center;gap:8px;padding:8px;border-radius:7px;cursor:pointer;font-size:13.5px;font-weight:700;line-height:1.35}
.tree-line-head:hover{background:var(--bg-soft)}
.tree-line-head.sel{background:var(--red-soft);color:var(--red)}
.tree-line-head .arrow{margin-left:auto;color:var(--muted);font-size:11px;transition:transform .15s}
.tree-line.open>.tree-line-head .arrow{transform:rotate(180deg)}
.tree-cats{display:none;padding-left:6px}
.tree-line.open .tree-cats{display:block}
.tree-cat-head{display:flex;align-items:center;gap:6px;padding:6px 8px 6px 20px;border-radius:6px;cursor:pointer;font-size:13px;font-weight:500;line-height:1.4}
.tree-cat-head:hover{background:var(--bg-soft)}
.tree-cat-head.sel{background:var(--red-soft);color:var(--red)}
.tree-cat-head .arrow{color:var(--muted);font-size:10px;transition:transform .15s}
.tree-cat.open>.tree-cat-head .arrow{transform:rotate(90deg)}
.tree-series{display:none}
.tree-cat.open .tree-series{display:block}
.tree-ser{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:4px 8px 4px 38px;
  font-size:12.5px;border-radius:6px;cursor:pointer;color:var(--muted);line-height:1.4}
.tree-ser:hover{background:var(--bg-soft);color:var(--ink)}
.tree-ser.sel{background:var(--red-soft);color:var(--red);font-weight:600}
.cnt{background:#EEF0F2;border-radius:999px;font-size:11px;padding:0 7px;color:var(--muted);margin-left:auto;flex-shrink:0;font-weight:400}
.filter-path{display:flex;align-items:center;gap:6px;flex-wrap:wrap;font-size:12.5px;color:var(--muted);margin-bottom:12px}
.filter-path .clear{color:var(--red);cursor:pointer;font-weight:600}

/* ---------- 响应式 ---------- */
@media (max-width:980px){
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .grid-3,.entry-grid{grid-template-columns:repeat(2,1fr)}
  .industry-grid{grid-template-columns:repeat(3,1fr)}
  .prod-grid{grid-template-columns:repeat(2,1fr)}
  .list-layout{grid-template-columns:1fr}
  .filter-box{position:static;max-height:none}
  .detail-layout,.inq-layout,.news-layout{grid-template-columns:1fr}
  .brand-stats{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr}
  .opt-grid.c4{grid-template-columns:repeat(2,1fr)}
  .cert-grid,.contact-grid{grid-template-columns:1fr}
}
@media (max-width:680px){
  .nav-toggle{display:block}
  .main-nav{display:none;position:absolute;top:64px;left:0;right:0;background:#fff;flex-direction:column;
    align-items:stretch;padding:10px 16px 16px;border-bottom:1px solid var(--line);box-shadow:var(--shadow-lg)}
  .main-nav.open{display:flex}
  .main-nav a{padding:11px 8px;border-bottom:1px solid var(--bg-soft)}
  .nav-drop-menu{position:static;box-shadow:none;border:none;padding:0 0 0 18px;min-width:0}
  .nav-drop:hover .nav-drop-menu{display:none}
  .nav-drop.mob-open .nav-drop-menu{display:block}
  .hero h1{font-size:27px}
  .grid-3,.grid-4,.entry-grid,.prod-grid,.opt-grid.c2,.opt-grid.c4{grid-template-columns:1fr}
  .industry-grid{grid-template-columns:repeat(2,1fr)}
  .wizard-panel{padding:22px}
  .news-card{flex-direction:column}
  .news-thumb{flex:none;height:110px}
  .section{padding:40px 0}
}

/* ---------- 解决方案卡片（索引式） ---------- */
.sol-card2{display:flex;flex-direction:column;padding:0;overflow:hidden;cursor:pointer;transition:all .18s ease}
.sol-card2:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg)}
.sol-card2 .sol-visual{height:96px;font-size:34px}
.sol-card2 .sol-body{padding:16px 18px;display:flex;flex-direction:column;gap:9px;flex:1}
.sol-card2 h3{font-size:16px}
.sol-tagline{font-size:13px;color:var(--muted)}
.sol-points{list-style:none;display:flex;flex-direction:column;gap:5px;font-size:12.5px;color:var(--ink)}
.sol-points li{padding-left:16px;position:relative}
.sol-points li::before{content:"⚡";position:absolute;left:0;font-size:10px;top:2px}
.sol-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;border-top:1px dashed var(--line);padding-top:10px;font-size:12.5px;color:var(--muted)}
.sol-go{color:var(--red);font-weight:600}

/* ---------- 解决方案详情页 ---------- */
.sold-hero{background:linear-gradient(135deg,#2B2F33,#4a5058);color:#fff;padding:40px 0}
.sold-hero .wrap{display:flex;gap:24px;align-items:flex-start;flex-wrap:wrap}
.sold-icon{font-size:44px}
.sold-hero h1{font-size:26px;margin-bottom:6px}
.sold-hero .sold-tag{font-size:14px;opacity:.85;margin-bottom:10px}
.sold-hero .sold-intro{font-size:13.5px;opacity:.75;max-width:760px}
.sold-docs{margin-left:auto;display:flex;flex-direction:column;gap:9px;min-width:250px}
.sold-docs .sold-docs-title{font-size:13px;font-weight:700;color:var(--yellow);letter-spacing:.04em;display:flex;align-items:center;gap:6px}
.sold-docs a{display:flex;gap:8px;align-items:center;background:#fff;border:1px solid #fff;
  color:var(--ink);font-weight:600;padding:10px 14px;border-radius:8px;font-size:13px;
  box-shadow:0 3px 10px rgba(0,0,0,.28);transition:all .15s}
.sold-docs a .dl-ico{color:var(--red);font-size:15px;flex:none}
.sold-docs a:hover{background:var(--red);border-color:var(--red);color:#fff;transform:translateY(-1px);box-shadow:0 6px 14px rgba(0,0,0,.32)}
.sold-docs a:hover .dl-ico{color:#fff}
.sol-node{border:1px solid var(--line);border-radius:var(--radius);margin-bottom:16px;overflow:hidden;box-shadow:var(--shadow)}
.sol-node-head{background:var(--bg-soft);padding:12px 18px;font-weight:700;display:flex;gap:10px;align-items:baseline;flex-wrap:wrap}
.sol-node-head .idx{color:var(--red);font-size:13px}
.sol-node-head .risk{font-weight:400;font-size:12.5px;color:var(--muted)}
.sol-node-body{padding:14px 18px;display:flex;flex-direction:column;gap:10px}
.sol-tech{font-size:12.5px;color:var(--blue-dark);background:var(--blue-soft);border-radius:6px;padding:8px 12px}
.sol-tech::before{content:"💡 "}
.sol-prod2{display:flex;align-items:center;gap:10px;flex-wrap:wrap;padding:8px 10px;border:1px solid var(--line);border-radius:8px;font-size:13px}
.sol-prod2:hover{border-color:var(--red)}
.sol-prod2 .m{font-weight:700}
.sol-prod2 .pn{color:var(--muted);font-size:12px}
.sol-prod2 .note{flex:1;color:var(--muted);font-size:12.5px;min-width:200px}
.sol-prod2 .btn-sm{padding:5px 12px;font-size:12px}
.sol-back{display:inline-flex;gap:6px;align-items:center;color:#fff;opacity:.8;font-size:13px;margin-bottom:14px}
.sol-back:hover{opacity:1}
.sol-cta{margin-top:34px;background:var(--red-soft);border:1px solid #F5C2C7;border-radius:var(--radius);
  padding:20px 24px;display:flex;align-items:center;gap:18px;flex-wrap:wrap}
.sol-cta b{font-size:16px}
.sol-cta p{color:var(--muted);font-size:13px;flex:1;min-width:220px}

/* ---- 模块 ↔ 底座 配对（黄线可插拔式 SPD） ---- */
.pair-box{margin:22px 0 6px;border:2px solid var(--red);border-radius:var(--radius);overflow:hidden;background:#fff}
.pair-head{background:var(--red-soft);color:var(--red-dark);font-weight:700;font-size:14px;padding:10px 16px}
.pair-body{display:flex;align-items:center;gap:16px;padding:14px 16px;flex-wrap:wrap}
.pair-thumb img{width:84px;height:84px;object-fit:contain;background:#fff;border:1px solid var(--line);border-radius:8px;padding:6px}
.pair-ops{display:flex;flex-direction:column;gap:8px}
.pair-box .pair-note{font-size:13px;color:var(--muted);margin:0;padding:10px 16px 0;line-height:1.6}
.pair-mods{display:flex;flex-wrap:wrap;gap:8px;padding:10px 16px 16px}
.pair-mod{border:1px solid var(--line);border-radius:8px;padding:6px 12px;font-size:13px;font-weight:600;color:var(--ink);background:var(--bg-soft)}
.pair-mod:hover{border-color:var(--red);color:var(--red)}
.pair-line{font-size:12px;margin-top:4px}
.pair-line.ok{color:#15803d}
.pair-line.warn{color:#b45309}