/* ========== 企业官网前台样式（主题色由 CSS 变量注入） ========== */
:root{
  --pri:#1a6feb; --accent:#f5a623; --txt:#2c3e50; --bg:#fff;
  --text:#334155; --muted:#64748b; --line:#e2e8f0; --soft:#f8fafc;
  --pri-soft:color-mix(in srgb, var(--pri) 8%, #fff);
  --shadow:0 2px 12px rgba(15,23,42,.06);
  --shadow-lg:0 10px 36px rgba(15,23,42,.10);
  --radius:12px;
}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:"Microsoft YaHei","PingFang SC",-apple-system,BlinkMacSystemFont,sans-serif;
  color:var(--text);line-height:1.7;background:var(--bg);-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul{list-style:none}
.wrap{max-width:1200px;margin:0 auto;padding:0 20px}

/* ---------- 头部 ---------- */
.hd{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:500;
  box-shadow:0 1px 3px rgba(15,23,42,.04)}
.hd-in{display:flex;align-items:center;justify-content:space-between;height:70px;gap:20px}
.logo{display:flex;align-items:center;flex-shrink:0}
.logo img{height:42px;max-width:220px;object-fit:contain}
.logo-txt{font-size:19px;font-weight:700;color:var(--txt);letter-spacing:.3px}
.nav{display:flex;gap:4px;align-items:center}
.nav a{padding:9px 17px;border-radius:7px;font-size:15px;color:var(--text);transition:.18s;font-weight:500}
.nav a:hover{background:var(--pri-soft);color:var(--pri)}
.nav a.on{background:var(--pri);color:#fff}
/* 在线商城入口（受商城开关控制，样式突出以便访客发现） */
.nav a.nav-shop{background:var(--accent);color:#fff;font-weight:600;margin-left:2px}
.nav a.nav-shop:hover{background:var(--accent);color:#fff;filter:brightness(1.08);transform:translateY(-1px)}
.nav-btn{display:none;background:none;border:none;font-size:22px;cursor:pointer;color:var(--txt);padding:6px}

/* ---------- 轮播 ---------- */
.banner{position:relative;height:480px;overflow:hidden;background:var(--soft)}
.bn-track{height:100%}
.bn-item{position:absolute;inset:0;opacity:0;transition:opacity .7s ease;display:block}
.bn-item.on{opacity:1}
.bn-item img{width:100%;height:100%;object-fit:cover}
.bn-mask{position:absolute;inset:0;background:linear-gradient(90deg,rgba(0,0,0,.62) 0%,rgba(0,0,0,.28) 55%,transparent 100%);z-index:1;pointer-events:none}
.bn-cap{position:absolute;left:0;right:0;top:50%;transform:translateY(-50%);z-index:2;
  max-width:1200px;margin:0 auto;padding:0 20px;color:#fff}
.bn-cap h2{font-size:40px;font-weight:700;margin-bottom:14px;line-height:1.3;
  text-shadow:0 2px 12px rgba(0,0,0,.35);font-family:inherit}
.bn-cap p{font-size:17px;opacity:.94;max-width:560px;text-shadow:0 1px 8px rgba(0,0,0,.35)}
.bn-cap .bn-btn{margin-top:22px;cursor:pointer}
@media(max-width:768px){.bn-cap h2{font-size:26px}.bn-cap p{font-size:15px}.banner{height:360px}.bn-arrow{display:none}.bn-cap{padding:0 24px}}
.bn-info{position:absolute;left:0;right:0;top:50%;transform:translateY(-50%);
  max-width:1200px;margin:0 auto;padding:0 20px;color:#fff}
.bn-info h2{font-size:40px;font-weight:700;margin-bottom:14px;line-height:1.3;text-shadow:0 2px 12px rgba(0,0,0,.3)}
.bn-info p{font-size:17px;opacity:.92;max-width:560px;text-shadow:0 1px 8px rgba(0,0,0,.3)}
.bn-btn{display:inline-block;margin-top:26px;padding:12px 34px;background:var(--pri);color:#fff;
  border-radius:8px;font-size:15px;font-weight:600;transition:.2s}
.bn-btn:hover{background:var(--accent);transform:translateX(3px)}
.bn-dots{position:absolute;bottom:26px;left:50%;transform:translateX(-50%);display:flex;gap:9px;z-index:10}
.bn-dots i{width:30px;height:4px;background:rgba(255,255,255,.45);border-radius:2px;cursor:pointer;transition:.2s;display:block}
.bn-dots i.on{background:#fff;width:42px}
.bn-arrow{position:absolute;top:50%;transform:translateY(-50%);width:46px;height:46px;
  background:rgba(255,255,255,.18);color:#fff;border:none;border-radius:50%;cursor:pointer;
  font-size:20px;z-index:10;transition:.2s;display:flex;align-items:center;justify-content:center}
.bn-arrow:hover{background:var(--pri)}
.bn-prev{left:22px} .bn-next{right:22px}

/* ---------- 通用区块 ---------- */
.sec{padding:64px 0}
.sec-alt{background:var(--soft)}
.sec-head{text-align:center;margin-bottom:44px}
.sec-head h3{font-size:30px;font-weight:700;color:var(--txt);margin-bottom:10px}
.sec-head p{color:var(--muted);font-size:15px}
.sec-line{width:52px;height:3px;background:var(--pri);margin:14px auto 0;border-radius:2px}

.more-link{display:inline-flex;align-items:center;gap:5px;color:var(--pri);font-size:14px;
  font-weight:500;margin-top:26px;transition:.15s}
.more-link:hover{gap:9px}

/* ---------- 卡片 ---------- */
.card-grid{display:grid;gap:24px}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
.g2{grid-template-columns:repeat(2,1fr)}

.p-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;transition:.25s;display:flex;flex-direction:column}
.p-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg);border-color:var(--pri)}
.p-img{aspect-ratio:4/3;overflow:hidden;background:var(--soft);position:relative}
.p-img img{width:100%;height:100%;object-fit:cover;transition:.45s}
.p-card:hover .p-img img{transform:scale(1.06)}
.p-badge{position:absolute;top:12px;left:12px;background:var(--accent);color:#fff;
  padding:3px 11px;border-radius:5px;font-size:12px;font-weight:600}
.p-body{padding:20px;flex:1;display:flex;flex-direction:column}
.p-t{font-size:17px;font-weight:600;color:var(--txt);margin-bottom:8px;
  transition:.15s;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.p-card:hover .p-t{color:var(--pri)}
.p-d{color:var(--muted);font-size:13.5px;line-height:1.7;flex:1;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.p-more{margin-top:14px;color:var(--pri);font-size:13.5px;font-weight:500;display:flex;align-items:center;gap:4px}
.p-card:hover .p-more{gap:8px}

/* ---------- 资讯 ---------- */
.n-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;transition:.25s;display:flex;flex-direction:column}
.n-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.n-card .n-img{aspect-ratio:16/9;overflow:hidden;background:var(--soft)}
.n-card .n-img img{width:100%;height:100%;object-fit:cover;transition:.45s}
.n-card:hover .n-img img{transform:scale(1.05)}
.n-body{padding:18px;flex:1;display:flex;flex-direction:column}
.n-meta{display:flex;align-items:center;gap:11px;font-size:12.5px;color:var(--muted);margin-bottom:9px}
.n-cat{background:var(--pri-soft);color:var(--pri);padding:2px 9px;border-radius:4px;font-weight:500}
.n-t{font-size:16px;font-weight:600;color:var(--txt);line-height:1.55;margin-bottom:8px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;transition:.15s}
.n-card:hover .n-t{color:var(--pri)}
.n-d{color:var(--muted);font-size:13.5px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}

/* ---------- 公告条 ---------- */
.notice-bar{background:var(--pri);color:#fff;padding:11px 0}
.notice-in{display:flex;align-items:center;gap:14px}
.notice-tag{background:rgba(255,255,255,.22);padding:3px 12px;border-radius:5px;
  font-size:13px;font-weight:600;flex-shrink:0}
.notice-list{flex:1;overflow:hidden;height:24px;position:relative}
.notice-item{position:absolute;inset:0;opacity:0;transition:opacity .4s;
  font-size:14px;line-height:24px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.notice-item.on{opacity:1}

/* ---------- 内页 banner ---------- */
.pg-banner{height:210px;background:linear-gradient(135deg,var(--pri),color-mix(in srgb,var(--pri) 65%, #000));
  display:flex;align-items:center;justify-content:center;color:#fff;text-align:center;position:relative;overflow:hidden}
.pg-banner h1{font-size:34px;font-weight:700;letter-spacing:1px}
.pg-banner p{margin-top:9px;opacity:.9;font-size:14.5px}
.pg-banner::after{content:'';position:absolute;bottom:0;left:0;right:0;height:50px;
  background:linear-gradient(transparent,rgba(0,0,0,.08))}

/* ---------- 内容排版 ---------- */
.content-wrap{padding:48px 0}
.side-layout{display:grid;grid-template-columns:230px 1fr;gap:32px;align-items:start}
.side-cate{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;position:sticky;top:90px}
.side-title{padding:16px 20px;background:var(--pri);color:#fff;font-size:16px;font-weight:600}
.side-list{padding:6px 0}
.side-list a{display:block;padding:11px 20px;font-size:14.5px;color:var(--text);transition:.15s;border-left:3px solid transparent}
.side-list a:hover{background:var(--pri-soft);color:var(--pri)}
.side-list a.on{background:var(--pri-soft);color:var(--pri);font-weight:600;border-left-color:var(--pri)}

.article{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:38px 42px}
.art-head{border-bottom:1px solid var(--line);padding-bottom:22px;margin-bottom:28px}
.art-title{font-size:27px;font-weight:700;color:var(--txt);line-height:1.45;margin-bottom:14px}
.art-meta{display:flex;gap:18px;flex-wrap:wrap;font-size:13.5px;color:var(--muted)}
.art-body{font-size:15.5px;line-height:2;color:#3f4a5c;word-break:break-word;overflow-x:auto}
.art-body img{max-width:100%;height:auto;border-radius:8px;margin:18px 0}
.art-body h2{font-size:21px;font-weight:700;color:var(--txt);margin:32px 0 14px;padding-left:12px;border-left:4px solid var(--pri)}
.art-body h3{font-size:18px;font-weight:600;color:var(--txt);margin:26px 0 12px}
.art-body p{margin-bottom:15px}
.art-body ul,.art-body ol{margin:0 0 15px 22px}
.art-body li{margin-bottom:7px}
.art-body table{width:100%;border-collapse:collapse;margin:18px 0;font-size:14px}
.art-body th{background:var(--soft);padding:10px;border:1px solid var(--line);text-align:left;font-weight:600}
.art-body td{padding:10px;border:1px solid var(--line)}

/* 产品参数表 */
.param-tb{width:100%;border-collapse:collapse;margin-top:8px;font-size:14px}
.param-tb th{width:150px;background:var(--soft);padding:12px 16px;text-align:left;
  border:1px solid var(--line);color:var(--txt);font-weight:600;vertical-align:top}
.param-tb td{padding:12px 16px;border:1px solid var(--line);color:#4b5563}

/* 面包屑 */
.crumb-bar{background:var(--soft);border-bottom:1px solid var(--line);padding:12px 0;font-size:13px;color:var(--muted)}
.crumb-bar a{color:var(--muted)}
.crumb-bar a:hover{color:var(--pri)}
.crumb-sep{margin:0 8px;opacity:.5}

/* 分页 */
.pager{display:flex;justify-content:center;gap:7px;margin-top:44px;flex-wrap:wrap}
.pager a,.pager span{padding:9px 17px;border:1px solid var(--line);border-radius:7px;
  background:#fff;font-size:14px;color:var(--text);transition:.15s}
.pager a:hover{border-color:var(--pri);color:var(--pri)}
.pager .on{background:var(--pri);border-color:var(--pri);color:#fff;font-weight:600}

/* 关于我们 */
.about-block{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:center}
.about-img{border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-lg)}
.about-img img{width:100%}
.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:44px}
.feature{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px 24px;text-align:center;transition:.25s}
.feature:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg);border-color:var(--pri)}
.feature-ic{width:56px;height:56px;margin:0 auto 16px;border-radius:14px;background:var(--pri-soft);
  display:flex;align-items:center;justify-content:center;font-size:24px;color:var(--pri)}
.feature h4{font-size:17px;font-weight:600;color:var(--txt);margin-bottom:9px}
.feature p{color:var(--muted);font-size:13.5px;line-height:1.75}

/* 联系我们 */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:start}
.info-list{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px}
.info-row{display:flex;gap:15px;padding:16px 0;border-bottom:1px dashed var(--line)}
.info-row:last-child{border-bottom:none}
.info-ic{width:42px;height:42px;border-radius:10px;background:var(--pri-soft);color:var(--pri);
  display:flex;align-items:center;justify-content:center;font-size:18px;flex-shrink:0}
.info-lb{font-size:12.5px;color:var(--muted);margin-bottom:3px}
.info-vl{font-size:15px;color:var(--txt);font-weight:500;word-break:break-all}
.map-box{border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);height:390px;background:var(--soft)}

/* ---------- 页脚 ---------- */
.ft{background:#1e293b;color:#94a3b8;padding:52px 0 0;margin-top:auto}
.ft h4{color:#fff;font-size:15.5px;font-weight:600;margin-bottom:17px}
.ft-grid{display:grid;grid-template-columns:2fr 1fr 1.4fr 1.4fr;gap:36px;padding-bottom:38px}
/* 配了官方授权店铺码时扩为五列：关于 / 导航 / 联系方式 / 关注我们 / 官方授权店铺 */
.ft-grid.has-shop{grid-template-columns:1.9fr .85fr 1.15fr 1.05fr 1.55fr;gap:30px}
.ft-col p{font-size:13.5px;line-height:1.85}
.ft-addr{margin-top:8px;color:#64748b}
.ft-links li{font-size:13.5px;line-height:2.2}
.ft-links a{transition:.15s}
.ft-links a:hover{color:var(--pri)}
.ft-bot{border-top:1px solid #334155;padding:19px 0;display:flex;
  justify-content:space-between;gap:14px;flex-wrap:wrap;font-size:13px;color:#64748b}
.ft-record{display:flex;gap:16px;flex-wrap:wrap}
.ft-record a{transition:.15s}
.ft-record a:hover{color:var(--pri)}

/* 微信二维码：必须完整显示（contain + 白底静区），禁止裁切/圆角裁角，否则手机扫不出来 */
.ft-qr-link{display:inline-block;line-height:0;border-radius:10px}
.ft-qr-img{width:152px;height:152px;object-fit:contain;background:#fff;padding:7px;
  border-radius:10px;box-shadow:0 6px 18px rgba(0,0,0,.22);transition:.22s}
.ft-qr-link:hover .ft-qr-img{transform:translateY(-2px);box-shadow:0 12px 26px rgba(0,0,0,.3)}
.ft-qr-cap{color:#94a3b8;font-size:12.5px;line-height:1.75;margin-top:10px}
.ft-qr-cap span{color:#64748b;font-size:12px}

/* 官方授权店铺码：统一尺寸正方形、整齐网格排列（contain + 白底静区，绝不裁切） */
.ft-shops{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px 12px}
.ft-shop{display:block;text-decoration:none;text-align:center;line-height:1.4}
.ft-shop-img{display:block;width:100%;aspect-ratio:1/1;object-fit:contain;background:#fff;
  padding:5px;border-radius:8px;box-shadow:0 4px 12px rgba(0,0,0,.18);transition:.2s}
.ft-shop:hover .ft-shop-img{transform:translateY(-2px);box-shadow:0 10px 22px rgba(0,0,0,.28)}
.ft-shop-name{display:block;margin-top:7px;font-size:12.5px;color:#cbd5e1;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.ft-shop-note{display:block;margin-top:2px;font-size:11.5px;color:#64748b;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis}

/* 联系页微信二维码卡片（同样规则：contain + 白底静区，不裁切） */
.cc-qr-link{display:inline-block;line-height:0;border-radius:8px}
.cc-qr{display:block;width:132px;height:132px;object-fit:contain;background:#fff;padding:6px;
  border-radius:8px;border:1px solid #e6ebf2;margin-top:4px;transition:.2s}
.cc-qr-link:hover .cc-qr{box-shadow:0 8px 20px rgba(15,23,42,.16)}

/* ---------- 客服 ---------- */
.svc{position:fixed;right:22px;bottom:24px;z-index:900}
.svc-toggle{display:flex;align-items:center;gap:9px;padding:12px 19px;background:var(--pri);
  color:#fff;border:none;border-radius:32px;cursor:pointer;font-size:14.5px;font-weight:600;
  box-shadow:0 6px 22px color-mix(in srgb,var(--pri) 40%, transparent);transition:.22s;font-family:inherit}
.svc-toggle:hover{transform:translateY(-2px);box-shadow:0 10px 28px color-mix(in srgb,var(--pri) 50%, transparent)}
.svc-dot{width:8px;height:8px;background:#4ade80;border-radius:50%;animation:blink 1.6s infinite}
@keyframes blink{0%,100%{opacity:1}50%{opacity:.35}}
.svc-panel{position:absolute;right:0;bottom:66px;width:352px;max-width:calc(100vw - 40px);
  background:#fff;border-radius:14px;box-shadow:0 16px 48px rgba(15,23,42,.2);
  overflow:hidden;display:none;flex-direction:column}
.svc-panel.show{display:flex;animation:svcIn .22s ease-out}
@keyframes svcIn{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}
.svc-head{background:var(--pri);color:#fff;padding:15px 17px;display:flex;align-items:center;gap:11px}
.svc-avatar{width:38px;height:38px;border-radius:50%;background:rgba(255,255,255,.24);
  display:flex;align-items:center;justify-content:center;font-weight:700;font-size:15px;flex-shrink:0}
.svc-hinfo{flex:1;min-width:0}
.svc-name{font-weight:600;font-size:15px}
.svc-status{font-size:12px;opacity:.9;display:flex;align-items:center;gap:5px;margin-top:1px}
.svc-status i{width:6px;height:6px;background:#4ade80;border-radius:50%;display:block}
.svc-close{background:none;border:none;color:#fff;font-size:22px;cursor:pointer;line-height:1;opacity:.85;padding:0}
.svc-close:hover{opacity:1}
.svc-body{flex:1;max-height:330px;overflow-y:auto;padding:15px;background:var(--soft);
  display:flex;flex-direction:column;gap:11px}
.svc-body::-webkit-scrollbar{width:5px}
.svc-body::-webkit-scrollbar-thumb{background:#cbd5e1;border-radius:3px}
.svc-msg{max-width:86%;padding:10px 14px;border-radius:11px;font-size:14px;line-height:1.75;
  white-space:pre-wrap;word-break:break-word}
.svc-msg.bot{background:#fff;border:1px solid var(--line);align-self:flex-start;
  border-bottom-left-radius:3px;color:var(--text)}
.svc-msg.user{background:var(--pri);color:#fff;align-self:flex-end;border-bottom-right-radius:3px}
.svc-hot{background:#fff;border:1px solid var(--line);border-radius:11px;padding:12px;
  align-self:stretch}
.svc-hot-title{font-size:12.5px;color:var(--muted);margin-bottom:9px;font-weight:600}
.svc-kw{display:block;width:100%;text-align:left;padding:7px 11px;margin-bottom:6px;
  background:var(--pri-soft);color:var(--pri);border:none;border-radius:6px;cursor:pointer;
  font-size:13px;transition:.15s;font-family:inherit}
.svc-kw:hover{background:var(--pri);color:#fff}
.svc-retry{display:inline-block;margin-top:6px;padding:3px 14px;background:var(--pri);color:#fff;
  border:none;border-radius:5px;font-size:12.5px;cursor:pointer;font-family:inherit}
.svc-retry:hover{opacity:.85}
.svc-foot{padding:11px;background:#fff;border-top:1px solid var(--line);display:flex;gap:9px;align-items:flex-end}
.svc-foot textarea{flex:1;border:1px solid var(--line);border-radius:8px;padding:8px 11px;
  resize:none;font-size:14px;font-family:inherit;max-height:88px;line-height:1.5}
.svc-foot textarea:focus{outline:none;border-color:var(--pri)}
.svc-send{padding:9px 17px;background:var(--pri);color:#fff;border:none;border-radius:8px;
  cursor:pointer;font-size:14px;font-weight:600;font-family:inherit;transition:.15s}
.svc-send:hover{background:var(--accent)}
.svc-contact{padding:9px 15px;background:#f1f5f9;font-size:12px;color:var(--muted);
  display:flex;gap:16px;flex-wrap:wrap;border-top:1px solid var(--line)}

/* 公告弹窗 */
.notice-mask{position:fixed;inset:0;background:rgba(0,0,0,.5);z-index:1200;
  display:flex;align-items:center;justify-content:center;padding:20px;animation:svcIn .2s}
.notice-box{background:#fff;border-radius:13px;max-width:560px;width:100%;padding:30px;
  position:relative;max-height:80vh;overflow-y:auto;box-shadow:0 20px 60px rgba(0,0,0,.3)}
.notice-box h3{font-size:20px;color:var(--txt);margin-bottom:16px;padding-right:26px;line-height:1.5}
.notice-c{font-size:14.5px;line-height:1.9;color:#4b5563}
.notice-c img{max-width:100%;height:auto;border-radius:7px}
.notice-x{position:absolute;top:13px;right:15px;background:none;border:none;font-size:24px;
  cursor:pointer;color:#94a3b8;line-height:1}
.notice-x:hover{color:var(--txt)}

/* ---------- 空态 ---------- */
.empty-tip{text-align:center;padding:70px 20px;color:var(--muted)}
.empty-tip-ic{font-size:46px;opacity:.3;margin-bottom:14px}

/* ---------- 响应式 ---------- */
@media(max-width:1250px){
  /* 五列太挤：店铺码整行下移，图片按固定尺寸排成一行 */
  .ft-grid.has-shop{grid-template-columns:1.7fr 1fr 1.2fr 1.2fr;gap:26px}
  .ft-grid.has-shop .ft-col-shop{grid-column:1 / -1}
  .ft-grid.has-shop .ft-shops{grid-template-columns:repeat(auto-fill,92px);justify-content:flex-start}
}
@media(max-width:1000px){
  .card-grid.g4{grid-template-columns:repeat(2,1fr)}
  .ft-grid{grid-template-columns:1fr 1fr;gap:28px}
  .ft-grid.has-shop{grid-template-columns:1fr 1fr;gap:28px}
  .ft-grid.has-shop .ft-col-shop{grid-column:auto}
  .ft-grid.has-shop .ft-shops{grid-template-columns:repeat(auto-fill,minmax(82px,1fr))}
  .about-block,.contact-grid{grid-template-columns:1fr;gap:30px}
  .feature-grid{grid-template-columns:1fr}
}
@media(max-width:768px){
  .nav-btn{display:block}
  .nav{position:absolute;top:70px;left:0;right:0;background:#fff;flex-direction:column;
    align-items:stretch;padding:8px;border-bottom:1px solid var(--line);box-shadow:var(--shadow-lg);
    display:none}
  .nav.show{display:flex}
  .nav a{padding:13px 18px}
  .card-grid.g3,.card-grid.g2,.card-grid.g4{grid-template-columns:1fr}
  .banner{height:330px}
  .bn-info h2{font-size:25px}
  .bn-info p{font-size:14.5px}
  .sec{padding:42px 0}
  .sec-head h3{font-size:24px}
  .side-layout{grid-template-columns:1fr;gap:20px}
  .side-cate{position:static}
  .article{padding:24px 20px}
  .art-title{font-size:21px}
  .ft-grid{grid-template-columns:1fr}
  .svc{right:14px;bottom:16px}
  .svc-txt{display:none}
  .svc-toggle{padding:13px 15px}
  .pg-banner{height:150px}
  .pg-banner h1{font-size:25px}
}
/* ===== H5 通用兜底：任何后台发布的图片/表格都不撑破手机屏 ===== */
.art-body img,.art-body video,.art-body iframe{max-width:100%;height:auto}
.art-body table{display:block;overflow-x:auto;-webkit-overflow-scrolling:touch}
.art-body pre,.art-body code{white-space:pre-wrap;word-break:break-all}

/* ===== 首页两侧悬浮广告（后台「广告管理」控制） =====
   position:fixed + top:50% + translateY(-50%)：始终停在视口垂直居中位置，
   页面上下滚动时位置不变。
   三级适配：≥1360 完整卡片（宽度随两侧留白自适应）；1024–1359 收成侧边小竖条；
   <1024 手机/平板隐藏，避免压住正文。 */
.side-ad{--sa-w:clamp(84px,calc((100vw - 1160px)/2),170px);
  position:fixed;top:calc(50% + 16px);transform:translateY(-50%);z-index:400;width:var(--sa-w);
  background:#fff;border:1px solid var(--line);border-radius:14px;
  box-shadow:0 12px 34px rgba(15,23,42,.14);pointer-events:auto;
  transition:box-shadow .25s}
.side-ad:hover{box-shadow:0 18px 44px rgba(15,23,42,.22)}
/* 距正文固定 10px，两侧留白不足时贴边（最小 10px） */
.sa-l{left:max(10px,calc((100vw - 1200px)/2 - var(--sa-w) - 10px))}
.sa-r{right:max(10px,calc((100vw - 1200px)/2 - var(--sa-w) - 10px))}
/* 图片区：完整等比显示，绝不裁切、不加圆角（二维码四角必须完整才可扫）；
   外层白底 + 内边距正好充当二维码的静区，并把关闭按钮挤到卡片外侧 */
.sa-img{padding:11px 11px 0;background:#fff;display:flex;align-items:center;justify-content:center}
.sa-img img{display:block;width:auto;height:auto;max-width:100%;max-height:260px;
  object-fit:contain;border-radius:0}
.sa-body{padding:12px 13px 14px;text-align:center}
.sa-body h4{font-size:14px;font-weight:600;color:var(--txt);line-height:1.5;margin-bottom:6px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.sa-body p{font-size:12px;color:var(--muted);line-height:1.6;margin-bottom:9px;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.sa-body p:last-child{margin-bottom:0}
.sa-more{display:inline-block;font-size:12px;font-weight:600;color:var(--pri);letter-spacing:.5px}
/* 纯文字版：主题色渐变底 + 金色底边 */
.sa-t-text{padding:26px 15px;border-color:transparent;
  background:linear-gradient(150deg,var(--pri) 0%,color-mix(in srgb,var(--pri) 60%,#000) 100%)}
.sa-t-text::after{content:'';position:absolute;left:0;right:0;bottom:0;height:3px;background:var(--accent)}
.sa-t-text .sa-body{padding:0}
.sa-t-text .sa-body h4{color:#fff;font-size:15px}
.sa-t-text .sa-body p{color:rgba(255,255,255,.86)}
.sa-t-text .sa-more{display:block;color:#fff;margin-top:10px;padding-top:9px;
  border-top:1px solid rgba(255,255,255,.3)}
/* 整卡可点（不嵌套块级链接，避免 HTML 非法） */
.sa-link{position:absolute;inset:0;z-index:2}
/* 关闭按钮：挪到卡片外侧右上角，避免悬停时压住二维码定位图案导致扫不出来 */
.sa-x{position:absolute;top:-10px;right:-10px;z-index:5;width:22px;height:22px;padding:0;
  display:flex;align-items:center;justify-content:center;border:1px solid var(--line);
  border-radius:50%;background:#fff;color:#94a3b8;font-size:15px;line-height:1;cursor:pointer;
  box-shadow:0 2px 8px rgba(15,23,42,.12);opacity:.65;transition:opacity .2s,color .2s;
  font-family:inherit}
.side-ad:hover .sa-x{opacity:1;color:var(--txt)}

/* 中屏（1024–1359）：收成贴边小竖条——标题竖排，图片隐藏，保证任何笔记本都看得见 */
@media(max-width:1359px){
  .side-ad{--sa-w:46px;width:46px;min-height:120px;border-radius:0 10px 10px 0;
    display:flex;flex-direction:column;justify-content:center}
  .sa-l{left:0}
  .sa-r{right:0;border-radius:10px 0 0 10px}
  .sa-img{display:none}
  .sa-t-text{padding:0}
  .sa-body{padding:16px 7px}
  .sa-body h4{display:block;-webkit-line-clamp:unset;writing-mode:vertical-rl;
    text-orientation:upright;letter-spacing:2px;font-size:13px;line-height:1.4;
    max-height:150px;margin:0 auto;overflow:hidden}
  .sa-body p,.sa-more{display:none}
  .sa-t-text .sa-body h4{font-size:13px}
  /* 无标题的纯图片广告：竖条兜底显示「广告」二字 */
  .side-ad:not(:has(.sa-body)){border-color:transparent;
    background:linear-gradient(150deg,var(--pri) 0%,color-mix(in srgb,var(--pri) 60%,#000) 100%)}
  .side-ad:not(:has(.sa-body))::after{content:'广告';writing-mode:vertical-rl;
    text-orientation:upright;letter-spacing:3px;font-size:13px;color:#fff;margin:auto;padding:16px 0}
  .sa-x{top:2px;right:2px;width:16px;height:16px;font-size:12px;opacity:.75}
}
/* 手机 / 平板：完全隐藏 */
@media(max-width:1023px){.side-ad{display:none!important}}

/* 竖条档（1024–1359）：点击竖条弹出完整广告卡（二维码放大到可扫），点遮罩/×收起 */
@media(max-width:1359px){
  .side-ad.sa-open{display:block;width:200px;left:50%!important;right:auto!important;
    top:50%;transform:translate(-50%,-50%);border-radius:14px;z-index:600;
    box-shadow:0 24px 60px rgba(15,23,42,.35)}
  .side-ad.sa-open::after{content:none}
  .side-ad.sa-open .sa-img{display:flex;padding:12px 12px 0;background:#fff}
  .side-ad.sa-open .sa-body{display:block;padding:12px 14px 14px}
  .side-ad.sa-open .sa-body h4{display:-webkit-box;-webkit-line-clamp:2;writing-mode:horizontal-tb;
    text-orientation:mixed;letter-spacing:0;font-size:14px;max-height:none;max-width:none;margin:0 0 6px}
  .side-ad.sa-open .sa-body p{display:block;-webkit-line-clamp:3}
  .side-ad.sa-open .sa-more{display:inline-block}
  .side-ad.sa-open.sa-t-text{padding:26px 15px;border-color:transparent;
    background:linear-gradient(150deg,var(--pri) 0%,color-mix(in srgb,var(--pri) 60%,#000) 100%)}
  .side-ad.sa-open .sa-x{top:-10px;right:-10px;width:22px;height:22px;font-size:15px;opacity:1}
  .sa-mask{position:fixed;inset:0;background:rgba(15,23,42,.45);z-index:500}
}