/* ============================================================
   vip.dehua.net · 前台主题（独立设计）
   设计原则：卡片式 / 模块化 / 三语友好 / 移动端优先
   主题变量由后台「外观设置」注入：--primary --radius --font
   ============================================================ */
:root{
  --primary:#1a5cff; --primary-weak:#eaf0ff; --ink:#111827; --ink-2:#4b5563; --ink-3:#8a94a6;
  --bg:#ffffff; --bg-soft:#f6f7f9; --line:#e6e9f0; --radius:14px; --font:system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;
  --shadow:0 1px 2px rgba(16,24,40,.04),0 8px 24px rgba(16,24,40,.06);
  --maxw:1200px;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;font-family:var(--font);color:var(--ink);background:var(--bg);line-height:1.7;font-size:16px}
img{max-width:100%;display:block;border-radius:calc(var(--radius) - 6px)}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{margin:0 0 .5em;line-height:1.3;font-weight:700;letter-spacing:-.01em}
h1{font-size:clamp(28px,4vw,44px)} h2{font-size:clamp(22px,2.6vw,32px)} h3{font-size:18px} h4{font-size:15px}
p{margin:0 0 1em}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 20px}
section{padding:56px 0}
section+section{border-top:1px solid var(--line)}
.lead{color:var(--ink-2);font-size:clamp(15px,1.6vw,18px)}

/* 按钮 */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:44px;padding:0 20px;border-radius:var(--radius);
  border:1px solid var(--line);background:#fff;color:var(--ink);font-size:15px;font-weight:600;cursor:pointer;transition:.15s}
.btn:hover{border-color:var(--primary);color:var(--primary)}
.btn.primary{background:var(--primary);border-color:var(--primary);color:#fff}
.btn.primary:hover{filter:brightness(1.08);color:#fff}
.btn.ghost{background:transparent}

/* 头部 */
.site-hd{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.site-hd .wrap{display:flex;align-items:center;gap:20px;height:64px}
.brand{font-weight:800;font-size:18px;letter-spacing:-.02em}
.nav{display:flex;gap:18px;flex:1}
.nav a{font-size:15px;color:var(--ink-2);padding:6px 0;border-bottom:2px solid transparent}
.nav a.on,.nav a:hover{color:var(--primary);border-color:var(--primary)}
.hd-right{display:flex;align-items:center;gap:12px}
.hd-right .search{display:flex;gap:6px}
.hd-right .search input{height:36px;width:150px;padding:0 12px;border:1px solid var(--line);border-radius:10px;font-size:14px}
.hd-right .search button{height:36px;padding:0 12px;border:1px solid var(--line);border-radius:10px;background:#fff;cursor:pointer}
.langs{display:flex;gap:4px}
.langs a{font-size:13px;color:var(--ink-3);padding:4px 8px;border-radius:8px}
.langs a.on{background:var(--primary-weak);color:var(--primary);font-weight:600}

/* 首屏 */
.hero{background:linear-gradient(180deg,var(--primary-weak),#fff 85%);padding:80px 0 64px;text-align:center}
.hero .lead{max-width:760px;margin:0 auto 24px}
.hero .cta{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}

/* 卡片体系 */
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.grid4{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:18px;box-shadow:var(--shadow);transition:.18s}
.card:hover{transform:translateY(-2px);box-shadow:0 6px 12px rgba(16,24,40,.06),0 16px 40px rgba(16,24,40,.10)}
.card .body{padding-top:12px}
.card h3{margin:0 0 6px;font-size:16px}
.card .sub{color:var(--ink-3);font-size:14px;margin:0}
.card.product .thumb{position:relative;aspect-ratio:1/1;background:var(--bg-soft);border-radius:calc(var(--radius) - 6px);overflow:hidden}
.card.product .thumb img{width:100%;height:100%;object-fit:cover;border-radius:0}
.card.product .price{color:var(--primary);font-weight:700;margin-top:8px}
.badge3d,.badge{position:absolute;top:10px;left:10px;background:var(--primary);color:#fff;font-size:12px;font-weight:700;padding:3px 8px;border-radius:999px}
.badge{left:auto;right:10px;background:#111827}
.card.stat{text-align:center;padding:22px 16px}
.card.stat .v{font-size:26px;font-weight:800;color:var(--primary);line-height:1.2}
.card.stat .l{font-size:13px;color:var(--ink-3)}
.card.cert img{aspect-ratio:3/4;object-fit:cover;margin-bottom:10px}
.card.quote{margin:0;padding:20px;border-left:3px solid var(--primary)}
.card.quote p{font-size:15px}
.card.quote cite{font-size:13px;color:var(--ink-3);font-style:normal}
.card.cat{display:flex;align-items:center;justify-content:space-between}
.card.dl .meta{font-size:12px;color:var(--ink-3)}
.card.m3d .m3d-view{position:relative;aspect-ratio:4/3;background:var(--bg-soft);border-radius:calc(var(--radius) - 6px);overflow:hidden}
.card.m3d .m3d-view img{width:100%;height:100%;object-fit:cover}
.card.m3d .play3d{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);height:38px;padding:0 16px;font-size:14px}
.card.contact h4{margin-bottom:6px}

/* 步骤 */
.steps-list{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(4,1fr);gap:20px;counter-reset:s}
.steps-list li{background:var(--bg-soft);border-radius:var(--radius);padding:18px}
.steps-list .no{display:inline-flex;width:28px;height:28px;align-items:center;justify-content:center;border-radius:50%;background:var(--primary);color:#fff;font-weight:700;font-size:14px;margin-bottom:10px}

/* FAQ */
.faq-list details{border:1px solid var(--line);border-radius:var(--radius);padding:14px 18px;margin-bottom:10px;background:#fff}
.faq-list summary{cursor:pointer;font-weight:600;font-size:15px}
.faq-list details>div{color:var(--ink-2);font-size:15px;padding-top:10px;border-top:1px dashed var(--line);margin-top:10px}

/* 询盘 */
.inquiry{background:var(--bg-soft)}
.lead-form{display:grid;grid-template-columns:1fr 1fr;gap:12px;max-width:720px}
.lead-form input,.lead-form textarea{width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:10px;font:inherit;font-size:15px;background:#fff}
.lead-form textarea,.lead-form button,.lead-form .sla{grid-column:1/-1}
.lead-form .sla{font-size:13px;color:var(--ink-3);margin:0}

/* 产品页 */
.product-page{padding:32px 0 64px}
.crumb{font-size:13px;color:var(--ink-3);margin-bottom:18px}
.crumb a:hover{color:var(--primary)}
.phead{margin-bottom:24px}
.pcard{margin-bottom:28px}
.pcard>.pcard{margin-bottom:16px}
.gallery .main{background:var(--bg-soft);border-radius:var(--radius);overflow:hidden;margin-bottom:10px}
.gallery .thumbs{display:flex;gap:10px;flex-wrap:wrap}
.gallery .thumbs img{width:88px;height:88px;object-fit:cover;cursor:pointer;border:2px solid transparent}
.gallery .thumbs img:hover{border-color:var(--primary)}
.m3dbox model-viewer{width:100%;height:420px}
.m3d-bar{display:flex;gap:10px;flex-wrap:wrap;margin-top:12px}
.m3d-bar .btn{height:38px;font-size:14px}
.tip{font-size:12px;color:var(--ink-3);margin:10px 0 0}
.spec-tbl{width:100%;border-collapse:collapse;font-size:15px}
.spec-tbl th{width:180px;text-align:left;font-weight:600;color:var(--ink-2);padding:10px 12px;background:var(--bg-soft)}
.spec-tbl td{padding:10px 12px;border-bottom:1px solid var(--line)}
.spin{position:relative;background:var(--bg-soft);border-radius:var(--radius);overflow:hidden;cursor:grab;touch-action:pan-y}
.spin img{width:100%;aspect-ratio:4/3;object-fit:contain}

/* 视频 */
.video-box{background:#000;border-radius:var(--radius);overflow:hidden}
.video-box video{width:100%;display:block}

/* 页脚 */
.site-ft{background:#0f1420;color:#c6cddb;padding:56px 0 24px;margin-top:0}
.site-ft .cols{display:grid;grid-template-columns:2fr 1fr 1fr;gap:32px}
.site-ft h4{color:#fff;margin-bottom:12px}
.site-ft a:hover{color:#fff}
.ft-brand{font-weight:800;font-size:18px;color:#fff;margin-bottom:10px}
.legal{border-top:1px solid #1e2636;margin-top:32px;padding-top:18px;font-size:13px;color:#7d879b}

/* 响应式 */
@media (max-width:900px){
  .grid4,.steps-list{grid-template-columns:repeat(2,1fr)}
  .grid3{grid-template-columns:repeat(2,1fr)}
  .site-ft .cols{grid-template-columns:1fr 1fr}
}
@media (max-width:600px){
  body{font-size:15px}
  section{padding:36px 0}
  .grid3,.grid4,.steps-list,.site-ft .cols,.lead-form{grid-template-columns:1fr}
  .site-hd .wrap{height:56px;gap:10px;flex-wrap:wrap}
  .nav{order:3;flex:1 0 100%;overflow-x:auto;gap:14px;padding-bottom:4px}
  .hd-right .search{display:none}
  .m3dbox model-viewer{height:300px}
  .hero{padding:48px 0 36px}
}

/* ===== 搜索 / 新闻 / 政策页（新增路由配套样式） ===== */
.search.big{display:flex;gap:10px;max-width:560px;margin:18px 0 10px}
.search.big input{flex:1;height:44px;padding:0 14px;border:1px solid var(--line);border-radius:var(--radius);font-size:15px;background:#fff}
.empty{padding:40px 0;color:var(--muted);text-align:center}
.meta{color:var(--muted);font-size:14px;margin:6px 0 18px}
.article-page,.doc-page{max-width:820px;padding:40px 20px 60px}
.article-page h1,.doc-page h1{font-size:30px;margin:12px 0 8px;line-height:1.35}
.article-page time{color:var(--muted);font-size:14px}
.article-page .cover{width:100%;border-radius:var(--radius);margin:18px 0;display:block}
.rich p{margin:0 0 16px;line-height:1.9;color:#2c3444}
.rich p:first-child{margin-top:18px}
.doc-page .rich p{font-size:15px}
@media (max-width:600px){
  .article-page,.doc-page{padding:24px 16px 44px}
  .article-page h1,.doc-page h1{font-size:23px}
  .search.big{flex-direction:column}
}

/* ===== Cookie 同意条（M-21）===== */
.consent-bar{position:fixed;left:0;right:0;bottom:0;z-index:800;background:#fff;border-top:1px solid var(--line);box-shadow:0 -8px 28px rgba(16,24,40,.12);padding:14px 20px}
.consent-bar[hidden]{display:none}
.cb-wrap{max-width:1200px;margin:0 auto;display:flex;gap:18px;align-items:center;flex-wrap:wrap}
.cb-txt{flex:1;min-width:260px}
.cb-txt b{font-size:14px}
.cb-txt p{margin:4px 0 0;font-size:13px;color:var(--muted);line-height:1.6}
.cb-acts{display:flex;gap:8px;flex-wrap:wrap}
.cb-pref{max-width:1200px;margin:10px auto 0;padding-top:10px;border-top:1px dashed var(--line);display:flex;gap:16px;align-items:center;flex-wrap:wrap}
.cb-pref[hidden]{display:none}
.cb-l{font-size:13px;color:#2c3444;display:flex;align-items:center;gap:6px}
@media (max-width:600px){
  .consent-bar{padding:12px 14px}
  .cb-acts{width:100%}
  .cb-acts .btn{flex:1}
}

/* ===== 下载中心留资门 ===== */
.card.dl.gated{position:relative}
.card.dl.gated::after{content:"🔒";position:absolute;right:12px;top:10px;font-size:15px}
.gate-modal{position:fixed;inset:0;z-index:900;background:rgba(10,14,22,.55);display:flex;align-items:center;justify-content:center;padding:20px}
.gate-box{background:#fff;border-radius:14px;max-width:420px;width:100%;padding:22px}
.gate-box h3{margin:0 0 6px;font-size:17px}
.gate-box p{margin:0 0 14px;font-size:13px;color:var(--muted)}
.gate-box .f{display:block;margin-bottom:10px}
.gate-box .f span{display:block;font-size:12px;color:#475467;margin-bottom:4px}
.gate-box input,.gate-box textarea{width:100%;height:36px;padding:0 10px;border:1px solid var(--line);border-radius:8px;box-sizing:border-box;font-size:14px}
.gate-box textarea{height:64px;padding:8px 10px}
.gate-err{color:#b42318;font-size:12px;min-height:16px}

/* ===== 在线客服浮标（M-22）===== */
.chatbar{position:fixed;right:16px;bottom:84px;z-index:700;display:flex;flex-direction:column;gap:8px}
.chatbar[hidden]{display:none}
.cb-item{display:flex;align-items:center;gap:8px;background:#fff;border:1px solid var(--line);border-radius:999px;padding:8px 14px 8px 10px;box-shadow:0 6px 18px rgba(16,24,40,.12);color:#2c3444;text-decoration:none;font-size:13px;transition:transform .15s,box-shadow .15s}
.cb-item:hover{transform:translateY(-2px);box-shadow:0 10px 24px rgba(16,24,40,.16)}
.cb-item svg{flex:none}
.cb-wa{color:#0f9d58}
.cb-wx{color:#07c160}
.cb-form{background:var(--primary);color:#fff;border-color:transparent}
@media (max-width:600px){
  .chatbar{right:10px;bottom:76px;gap:6px}
  .cb-item{padding:7px 10px;font-size:0}
  .cb-item span{display:none}
  .cb-item svg{width:22px;height:22px}
}

/* ===== 产品中心：分类筛选 / 排序 / 分页 ===== */
.cat-tabs{display:flex;gap:8px;flex-wrap:wrap;margin:14px 0 6px}
.ct{padding:7px 14px;border:1px solid var(--line);border-radius:999px;font-size:13px;color:#475467;text-decoration:none;background:#fff;transition:.15s}
.ct:hover{border-color:var(--primary);color:var(--primary)}
.ct.on{background:var(--primary);border-color:var(--primary);color:#fff}
.list-bar{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;padding:12px 0;border-bottom:1px solid var(--line);margin-bottom:16px}
.sorter{display:flex;gap:6px}
.so{padding:5px 12px;border-radius:8px;font-size:13px;color:#667085;text-decoration:none}
.so:hover{background:#f2f4f7}
.so.on{background:#eef4ff;color:var(--primary);font-weight:600}
.pager{display:flex;gap:6px;justify-content:center;align-items:center;margin:28px 0 8px;flex-wrap:wrap}
.pg{min-width:34px;height:34px;padding:0 10px;display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--line);border-radius:8px;font-size:13px;color:#475467;text-decoration:none;background:#fff}
.pg:hover{border-color:var(--primary);color:var(--primary)}
.pg.on{background:var(--primary);border-color:var(--primary);color:#fff;font-weight:600}
.pg.gap{border:none;background:none;color:#98a2b3}
@media (max-width:600px){
  .cat-tabs{gap:6px}
  .ct{padding:6px 11px;font-size:12px}
  .list-bar{font-size:12px}
}