/* ==========================================================================
   XTIOT · 商用扫码器（sysmq）全站样式
   仅系统字体栈，不引入任何外部字体 / 图标库 / 第三方资源
   ========================================================================== */

:root{
  --navy-900:#0a1c2e;
  --navy-800:#102b45;
  --navy-700:#173c5c;
  --blue-700:#0e5480;
  --blue-600:#12679b;
  --blue-500:#1a80bd;
  --amber-600:#c2741f;
  --amber-500:#e08b2d;
  --amber-050:#fdf4e7;
  --ink-900:#0f1c29;
  --ink-700:#31465a;
  --ink-500:#5d7085;
  --ink-300:#94a5b6;
  --line:#dfe7ee;
  --line-soft:#eef3f7;
  --bg-soft:#f5f8fa;
  --white:#fff;
  --ok:#12805c;
  --warn:#b46a13;
  --shadow-sm:0 1px 3px rgba(10,28,46,.06),0 1px 2px rgba(10,28,46,.04);
  --shadow-md:0 10px 26px rgba(10,28,46,.10);
  --radius:14px;
  --radius-sm:9px;
  --maxw:1180px;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--white);color:var(--ink-700);font-size:16px;line-height:1.75;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",Arial,sans-serif;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--blue-700);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3,h4{color:var(--ink-900);line-height:1.32;margin:0;font-weight:700}
p{margin:0 0 12px}
ul,ol{margin:0 0 12px;padding-left:22px}
ol.num-list{padding-left:0;list-style:none;counter-reset:nl}
ol.num-list>li{position:relative;padding:0 0 0 34px;margin:0 0 12px}
ol.num-list>li::before{counter-increment:nl;content:counter(nl);position:absolute;left:0;top:1px;width:24px;height:24px;border-radius:50%;background:var(--navy-900);color:#fff;font-size:13px;font-weight:700;line-height:24px;text-align:center}
ol.num-list>li>b:first-child,ol.num-list>li>strong:first-child{display:block;margin-bottom:2px}
li{margin:5px 0}
b,strong{color:var(--ink-900)}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 22px}
.skip{position:absolute;left:-9999px;top:0;background:var(--navy-900);color:#fff;padding:10px 16px;z-index:99}
.skip:focus{left:8px;top:8px}

/* ---------------- 顶栏 ---------------- */
.topbar{background:var(--navy-900);color:#b9cadb;font-size:13px}
.topbar .wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:38px}
.topbar-left{display:flex;align-items:center;gap:8px;color:#9db1c6;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;min-width:0}
.topbar .dot{width:6px;height:6px;border-radius:50%;background:var(--amber-500);flex:none}
.phones{display:flex;align-items:center;gap:10px;white-space:nowrap}
.phones .lbl{color:#e7eff7;font-weight:600;font-size:13px}
.phones a{color:#ffb14d;font-weight:700;font-size:14px;letter-spacing:.2px}
.phones a:hover{text-decoration:none;color:#ffc978}
.phones .mail,.phones .mail b{color:#fff;font-weight:600;font-size:13.5px;white-space:nowrap}
@media (max-width:1400px){.topbar-left{display:none}.topbar .wrap{justify-content:center}}

/* ---------------- 头部 ---------------- */
.site-header{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:50}
.site-header .wrap{display:flex;align-items:center;gap:18px;min-height:74px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;flex:none}
.brand:hover{text-decoration:none}
.brand-logo{width:44px;height:40px;object-fit:contain}
.brand-text{display:flex;flex-direction:column;line-height:1.2}
.brand-text b{font-size:18px;color:var(--navy-900);letter-spacing:.3px}
.brand-text span{font-size:11px;color:var(--ink-500);letter-spacing:.6px}
.main-nav{display:flex;align-items:center;gap:2px;margin-left:auto;flex-wrap:wrap}
.main-nav a{color:var(--ink-700);font-size:15px;padding:8px 10px;border-radius:8px;font-weight:500}
.main-nav a:hover{background:var(--bg-soft);color:var(--blue-700);text-decoration:none}
.main-nav a.on{color:var(--blue-700);background:var(--bg-soft);font-weight:700}
.main-nav a.nav-cta{background:var(--blue-700);color:#fff;font-weight:600;margin-left:8px;padding:9px 16px}
.main-nav a.nav-cta:hover{background:var(--navy-700);color:#fff}
.nav-toggle{display:none;margin-left:auto;background:none;border:0;padding:10px;cursor:pointer}
.nav-toggle span{display:block;width:22px;height:2px;background:var(--navy-900);margin:4px 0}

/* ---------------- 面包屑 ---------------- */
.crumbs{background:var(--bg-soft);border-bottom:1px solid var(--line);font-size:13px;color:var(--ink-500)}
.crumbs .wrap{display:flex;align-items:center;gap:8px;min-height:38px;flex-wrap:wrap}
.crumbs a{color:var(--ink-500)}
.crumbs .cur{color:var(--ink-900);font-weight:600}
.crumbs .sep{color:var(--ink-300)}

/* ---------------- 首屏 ---------------- */
.page-hero{padding:40px 0 34px;background:linear-gradient(180deg,#f8fbfd 0%,#fff 100%);border-bottom:1px solid var(--line)}
.page-hero .kicker{display:inline-block;font-size:12.5px;font-weight:700;letter-spacing:.8px;color:var(--amber-600);background:var(--amber-050);padding:4px 11px;border-radius:999px;margin-bottom:12px}
.page-hero h1{font-size:31px;letter-spacing:-.2px;margin-bottom:14px;max-width:920px}
.answer{font-size:16.5px;color:var(--ink-700);max-width:880px;margin:0 0 18px;line-height:1.85}
.hero-cta{display:flex;gap:12px;flex-wrap:wrap;margin:18px 0 6px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:11px 20px;border-radius:10px;font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;text-decoration:none;transition:.15s}
.btn:hover{text-decoration:none;transform:translateY(-1px)}
.btn-primary{background:var(--blue-700);color:#fff;box-shadow:var(--shadow-sm)}
.btn-primary:hover{background:var(--navy-700)}
.btn-ghost{background:#fff;color:var(--navy-800);border-color:#c8d6e3}
.btn-ghost:hover{border-color:var(--blue-500);color:var(--blue-700)}
.btn-lg{padding:13px 24px;font-size:16px}
.hero-points{list-style:none;padding:0;margin:18px 0 0;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px 24px;max-width:900px}
.hero-points li{position:relative;padding-left:22px;font-size:14.5px;color:var(--ink-700)}
.hero-points li::before{content:"";position:absolute;left:0;top:.62em;width:8px;height:8px;border-radius:2px;background:var(--amber-500)}
.hero-split{display:grid;grid-template-columns:1.12fr .88fr;gap:36px;align-items:center;padding-top:36px;padding-bottom:30px}
.hero-split h1{font-size:32px;letter-spacing:-.3px;text-wrap:balance}
.hero-split .figure-box{min-height:0;padding:8px;background:#fff}
.hero-split .figure-box img{max-height:400px}

/* ---------------- 区块 ---------------- */
.section{padding:50px 0}
.section.soft{background:var(--bg-soft);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section h2{font-size:24px;margin-top:34px}
.section h2:first-child,.section .wrap>h2:first-child{margin-top:0}
.section h2 + .lead{margin-top:2px}
h2 + .table-wrap,h2 + .grid,h2 + .model-grid,h2 + .figs,h2 + p,h2 + .ad-grid{margin-top:16px}
.lead{font-size:16.5px;color:var(--ink-700);max-width:900px;margin:0 0 16px;line-height:1.85}
.section .table-wrap,.section .grid,.section .model-grid,.section .note,.section .ad-grid{margin:18px 0}

.grid{display:grid;gap:18px}
.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid-4{grid-template-columns:repeat(4,minmax(0,1fr))}

.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow-sm)}
.card h3{font-size:17px;margin-bottom:8px}
.card p{font-size:14.5px;color:var(--ink-700);margin:0}
.card .tagline{display:inline-block;font-size:12px;font-weight:700;color:var(--amber-600);margin-bottom:6px;letter-spacing:.5px}
.card .more{display:inline-block;margin-top:10px;font-size:13.5px;font-weight:700}

/* ---------------- 表格 ---------------- */
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius);background:#fff}
table{width:100%;border-collapse:collapse;font-size:14px}
th,td{padding:11px 14px;text-align:left;vertical-align:top;border-bottom:1px solid var(--line)}
thead th{background:#eef4f9;color:var(--navy-800);font-weight:700;white-space:nowrap;border-bottom:1px solid #d5e2ed}
tbody tr:last-child td{border-bottom:0}
tbody tr:nth-child(even){background:#fbfdff}
table a{font-weight:600}
.spec-table th{width:30%;background:#f7fafc;font-weight:600;color:var(--ink-900);white-space:normal}
.matrix td:first-child,.matrix th:first-child{white-space:nowrap;font-weight:600;color:var(--navy-800)}

/* ---------------- 图 ---------------- */
.figure{margin:0}
.figure-box{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:12px;display:flex;align-items:center;justify-content:center;min-height:170px}
.figure-box img{object-fit:contain;max-height:420px;width:auto;margin:0 auto}
figure figcaption{font-size:13px;color:var(--ink-500);margin-top:8px;line-height:1.65}
.figure.solo{max-width:720px;margin:0 auto}
.fig-row{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.fig-row-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}

/* 带文字的详情图：整幅展示，左图右说明 */
.detail-strip{display:grid;grid-template-columns:1fr 1fr;gap:0;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:#fff;margin:18px 0;box-shadow:var(--shadow-sm)}
.detail-strip figure{margin:0;background:#f7fafc;display:flex;align-items:center;justify-content:center;padding:10px}
.detail-strip figure img{width:100%;height:auto;object-fit:contain;max-height:560px}
.detail-strip .txt{padding:22px 24px;display:flex;flex-direction:column;justify-content:center;gap:8px}
.detail-strip .txt h3{font-size:17px}
.detail-strip .txt p{font-size:14.5px;color:var(--ink-700);margin:0}
.detail-strip:nth-child(even) figure{order:2}
@media (max-width:820px){.detail-strip{grid-template-columns:1fr}.detail-strip:nth-child(even) figure{order:0}}

/* ---------------- 型号卡 ---------------- */
.model-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
.model-card{display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:.18s;box-shadow:var(--shadow-sm)}
.model-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);border-color:#bfd6e6;text-decoration:none}
.model-card .thumb{background:#f7fafc;border-bottom:1px solid var(--line);padding:14px;display:flex;align-items:center;justify-content:center;height:212px}
.model-card .thumb img{max-height:184px;width:auto;object-fit:contain}
.model-card .body{padding:15px 18px 18px;display:flex;flex-direction:column;gap:6px;flex:1}
.model-card h3{font-size:18px;letter-spacing:.2px;color:var(--ink-900)}
.model-card .tag{font-size:12.5px;color:var(--amber-600);font-weight:700}
.model-card p{font-size:13.5px;color:var(--ink-500);margin:0;flex:1}
.model-card .more{font-size:13.5px;font-weight:700;color:var(--blue-700);margin-top:6px}

/* 品类入口瓦片 */
.tiles{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:14px}
.tile{position:relative;display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-sm);transition:.18s}
.tile:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);text-decoration:none;border-color:#bfd6e6}
.tile .im{background:#f7fafc;height:150px;display:flex;align-items:center;justify-content:center;padding:10px;border-bottom:1px solid var(--line)}
.tile .im img{max-height:130px;width:auto;object-fit:contain}
.tile .tt{padding:12px 14px 14px}
.tile .tt b{display:block;font-size:15.5px;color:var(--ink-900)}
.tile .tt span{font-size:12.5px;color:var(--ink-500)}

/* ---------------- 步骤 ---------------- */
.steps{counter-reset:s;list-style:none;padding:0;margin:0;display:grid;gap:12px}
.steps li{counter-increment:s;position:relative;padding:14px 18px 14px 56px;background:#fff;border:1px solid var(--line);border-radius:var(--radius-sm);font-size:14.5px}
.steps li::before{content:counter(s);position:absolute;left:16px;top:14px;width:26px;height:26px;border-radius:50%;background:var(--amber-050);color:var(--amber-600);font-weight:700;font-size:13px;display:flex;align-items:center;justify-content:center}

/* ---------------- FAQ ---------------- */
.faq{border:1px solid var(--line);border-radius:var(--radius);background:#fff;overflow:hidden}
.faq + .faq{margin-top:10px}
.section .faq:first-of-type{margin-top:14px}
.faq summary{cursor:pointer;padding:16px 20px;font-weight:600;color:var(--ink-900);font-size:15.5px;list-style:none;position:relative;padding-right:44px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:20px;top:50%;transform:translateY(-50%);font-size:20px;color:var(--blue-600);font-weight:400}
.faq[open] summary::after{content:"−"}
.faq .a{padding:0 20px 18px;font-size:14.5px;color:var(--ink-700)}
.faq .a p:last-child{margin-bottom:0}

/* ---------------- 提示 ---------------- */
.note{background:#fdf8ef;border-left:3px solid var(--amber-500);border-radius:0 10px 10px 0;padding:12px 16px;font-size:14px;color:#6a4a1e}
.note.ok{background:#eaf7f1;border-left-color:var(--ok);color:#0d5f46}
.note b{color:inherit}

/* ---------------- CTA ---------------- */
.cta-band{background:var(--navy-900);color:#d7e3ef;padding:40px 0}
.cta-band .wrap{display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap}
.cta-band h2{color:#fff;font-size:22px;margin-bottom:6px}
.cta-band p{margin:0;color:#a9c0d5;font-size:14.5px}
.cta-band .btn-primary{background:var(--amber-600)}
.cta-band .btn-primary:hover{background:#a86216}
.cta-band .btn-ghost{background:transparent;color:#fff;border-color:#3b566f}
.cta-band .btn-ghost:hover{background:#132f4a;color:#fff}

/* ---------------- 页脚 ---------------- */
.site-footer{background:#07131f;color:#8fa4b9;font-size:13.5px;padding:44px 0 22px}
.site-footer .cols{display:grid;grid-template-columns:1.35fr 1fr 1fr 1fr 1.15fr;gap:26px;margin-bottom:26px}
.site-footer h4{color:#fff;font-size:14px;margin-bottom:10px;letter-spacing:.4px}
.site-footer a{color:#a3b7cb}
.site-footer a:hover{color:#fff;text-decoration:none}
.site-footer ul{list-style:none;padding:0;margin:0}
.site-footer li{margin:6px 0}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:10px}
.footer-brand img{width:40px;height:36px;object-fit:contain;background:#fff;border-radius:6px;padding:2px}
.footer-brand b{color:#fff;font-size:16px}
.site-footer .muted{color:#6c8298;font-size:12.5px;line-height:1.7}
.footer-contact li{display:flex;gap:8px;font-size:13px}
.footer-contact .k{color:#7b91a7;flex:none}
.footer-contact b{color:#e3ecf5}
.icp{border-top:1px solid #17293c;padding-top:16px;display:flex;gap:18px;flex-wrap:wrap;align-items:center;font-size:12.5px;color:#6d849a}
.icp a{color:#8ba2b8}

/* 广告图墙（图内自带文案） */
.ad-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
.ad{margin:0;background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-sm)}
.ad img{width:100%;height:auto;display:block;aspect-ratio:4/3;object-fit:contain;background:#f5f8fa}
.ad figcaption{font-size:13px;color:var(--ink-500);padding:10px 14px;border-top:1px solid var(--line);margin:0;line-height:1.6}
.ad-grid.one{grid-template-columns:minmax(0,520px)}
.ad-grid.two{grid-template-columns:repeat(2,minmax(0,1fr))}

/* 适合 / 不适合 */
.fit-two{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin:16px 0}
.fit-two .box{border:1px solid var(--line);border-radius:var(--radius);padding:16px 18px;background:#fff}
.fit-two .box h4{font-size:14.5px;margin-bottom:8px}
.fit-two .box.yes{border-left:3px solid var(--ok)}
.fit-two .box.no{border-left:3px solid var(--amber-500)}
.fit-two ul{margin:0;padding-left:20px;font-size:14px;color:var(--ink-700)}

/* 参数徽标 */
.kv-row{display:flex;flex-wrap:wrap;gap:10px;margin:16px 0}
.kv{background:#fff;border:1px solid var(--line);border-radius:10px;padding:8px 14px;font-size:13.5px;color:var(--ink-700)}
.kv b{color:var(--navy-800);font-size:15px;margin-right:4px}

/* 页内目录 */
.toc{background:var(--bg-soft);border:1px solid var(--line);border-radius:var(--radius);padding:13px 18px;margin:0 0 18px}
.toc b{display:block;font-size:12.5px;color:var(--ink-500);letter-spacing:.5px;margin-bottom:6px}
.toc a{font-size:14px;margin-right:14px;white-space:nowrap;display:inline-block}

/* 证书 */
.cert-grid .figure-box{height:300px;padding:8px}
.cert-grid .figure-box img{max-height:282px;width:auto}
.cert-grid figcaption{font-size:12.5px}

/* ---------------- 响应式 ---------------- */
@media (max-width:1080px){
  .model-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid-4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .tiles{grid-template-columns:repeat(3,minmax(0,1fr))}
  .site-footer .cols{grid-template-columns:1fr 1fr}
}
@media (max-width:900px){
  .hero-split{grid-template-columns:1fr;gap:22px;padding-top:26px;padding-bottom:22px}
  .hero-split h1{font-size:25px}
  .ad-grid,.ad-grid.four{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:860px){
  .grid-2,.grid-3,.fig-row,.fig-row-3{grid-template-columns:1fr}
  .hero-points{grid-template-columns:1fr}
  .page-hero h1{font-size:25px}
  .section{padding:36px 0}
  .nav-toggle{display:block}
  .main-nav{display:none;position:absolute;top:74px;left:0;right:0;background:#fff;border-bottom:1px solid var(--line);flex-direction:column;align-items:stretch;padding:10px 16px 16px;gap:2px;box-shadow:var(--shadow-md)}
  .main-nav.open{display:flex}
  .main-nav a{padding:11px 12px;font-size:15px}
  .main-nav a.nav-cta{margin-left:0;text-align:center;margin-top:6px}
  .site-header .wrap{position:relative;min-height:64px}
  .brand-text b{font-size:16px}
  .phones{gap:8px;flex-wrap:wrap;justify-content:center;padding:4px 0}
  .phones a{font-size:13px}
  .tiles{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:700px){.fit-two{grid-template-columns:1fr}}
@media (max-width:620px){
  .model-grid{grid-template-columns:1fr}
  .site-footer .cols{grid-template-columns:1fr}
  .cta-band .wrap{flex-direction:column;align-items:flex-start}
  th,td{padding:9px 10px;font-size:13px}
  .ad-grid,.ad-grid.two,.ad-grid.one{grid-template-columns:1fr}
  .cert-grid .figure-box{height:220px}
  .cert-grid .figure-box img{max-height:202px}
}

/* 场景卡（带图 + 文字） */
.scene-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px;margin:18px 0}
.scene-card{display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-sm);transition:.18s}
.scene-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);text-decoration:none;border-color:#bfd6e6}
.scene-card .im{height:186px;background:#f4f8fb;display:flex;align-items:center;justify-content:center;overflow:hidden;border-bottom:1px solid var(--line);padding:8px}
.scene-card .im img{width:100%;height:100%;object-fit:contain}
.scene-card .im picture{display:block;width:100%;height:100%}
.scene-card .tt{padding:12px 14px 16px}
.scene-card .tt b{display:block;font-size:15.5px;color:var(--ink-900);margin-bottom:4px}
.scene-card .tt span{font-size:13px;color:var(--ink-500);line-height:1.6}
@media (max-width:1080px){.scene-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:560px){.scene-grid{grid-template-columns:1fr}}