/* =========================================================
   联控智造 LIANKONG — 官网样式（国网 / 政务风）
   国网蓝主色 + 党政红点缀 · 庄重、权威、正式
   ========================================================= */

:root{
  --ink:        #15233a;
  --blue:       #1860f0;   /* 品牌蓝 主色(与系统一致) */
  --blue-600:   #1250d4;
  --blue-700:   #0e3ea8;
  --blue-deep:  #0a1a3c;   /* 深色区(系统深藏蓝) */
  --blue-navy:  #081226;   /* 页脚 */
  --red:        #e8791f;   /* 制造橙 点缀(与系统 MES 驾驶舱一致) */
  --red-600:    #c76210;
  --paper:      #f2f5fa;
  --paper-2:    #e9eef6;
  --white:      #ffffff;
  --muted:      #58657a;
  --muted-2:    #8492a6;
  --line:       #dbe3ee;
  --line-2:     #e8edf5;
  --shadow-sm:  0 1px 2px rgba(8,40,80,.06), 0 3px 12px rgba(8,40,80,.05);
  --shadow-md:  0 16px 38px -18px rgba(8,40,80,.26);
  --shadow-lg:  0 30px 66px -26px rgba(6,34,66,.4);
  --radius:     6px;
  --wrap:       1220px;
  --sans: "PingFang SC","Microsoft YaHei UI","Microsoft YaHei","Hiragino Sans GB","Noto Sans SC","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:92px}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{margin:0;font-family:var(--sans);color:var(--ink);background:var(--white);
  line-height:1.75;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{line-height:1.3;font-weight:800;margin:0}
p{margin:0}
.wrap{width:min(var(--wrap),100% - 44px);margin-inline:auto}
.skip-link{position:absolute;left:-999px;top:0;background:var(--blue);color:#fff;padding:10px 16px;z-index:300}
.skip-link:focus{left:0}

/* 按钮 */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5em;padding:12px 26px;
  border-radius:var(--radius);font-weight:700;font-size:15px;line-height:1;cursor:pointer;border:1px solid transparent;
  transition:background .2s,color .2s,border-color .2s}
.btn-primary{background:var(--blue);color:#fff}
.btn-primary:hover{background:var(--blue-600)}
.btn-outline{border-color:#fff;color:#fff;background:transparent}
.btn-outline:hover{background:rgba(255,255,255,.12)}
.btn-nav{background:var(--blue);color:#fff;padding:9px 20px;font-size:14px}
.btn-nav:hover{background:var(--blue-600)}

/* ===== 顶部信息条 ===== */
.utility-bar{background:var(--blue-deep);color:#b8cae2;font-size:12.5px}
.util-inner{display:flex;justify-content:space-between;align-items:center;height:36px}
.util-welcome{letter-spacing:.02em}
.util-right{display:flex;align-items:center;gap:12px}
.util-right a:hover{color:#fff}
.util-right i{color:rgba(255,255,255,.25);font-style:normal}

/* ===== 顶部导航 ===== */
.site-header{position:sticky;top:0;z-index:100;background:var(--white);border-bottom:1px solid var(--line);transition:box-shadow .3s}
.site-header.scrolled{box-shadow:var(--shadow-sm)}
.header-inner{display:flex;align-items:center;gap:22px;height:72px}
.brand{display:inline-flex;align-items:center;gap:12px;color:var(--blue);flex-shrink:0}
.brand-mark{width:34px;height:34px;color:var(--blue);object-fit:contain}
.hero-btns{display:flex;gap:14px;flex-wrap:wrap}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text b{font-size:21px;font-weight:800;letter-spacing:.08em}
.brand-text i{font-size:10.5px;font-style:normal;color:var(--muted-2);letter-spacing:.08em}
.site-nav{display:flex;gap:4px;margin-left:auto}
.site-nav a{font-size:15.5px;font-weight:600;color:var(--ink);padding:8px 15px;border-radius:4px;position:relative;transition:color .2s,background .2s;white-space:nowrap}
.site-nav a:hover{color:var(--blue);background:var(--paper)}
.site-nav a::after{content:"";position:absolute;left:15px;right:15px;bottom:2px;height:2px;background:var(--red);transform:scaleX(0);transition:transform .25s}
.site-nav a:hover::after{transform:scaleX(1)}
.site-header .btn-nav{margin-left:8px}
.nav-toggle{display:none;flex-direction:column;gap:5px;width:42px;height:42px;align-items:center;justify-content:center;background:none;border:1px solid var(--line);border-radius:5px;margin-left:auto;cursor:pointer}
.nav-toggle span{width:20px;height:2px;background:var(--blue);transition:.25s}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ===== 大图轮播 ===== */
.hero{position:relative;overflow:hidden}
.slides{position:relative;height:clamp(420px,52vw,560px)}
.slide{position:absolute;inset:0;background-size:cover;background-position:center;
  display:flex;align-items:center;opacity:0;visibility:hidden;transition:opacity .8s ease}
.slide.is-active{opacity:1;visibility:visible}
.slide-inner{color:#fff;max-width:760px}
.slide-tag{display:inline-block;font-size:14px;font-weight:600;color:#fff;background:var(--red);padding:6px 16px;border-radius:3px;margin-bottom:20px;letter-spacing:.02em}
.slide h1{font-size:clamp(28px,4.4vw,52px);line-height:1.25;letter-spacing:.01em;margin-bottom:18px;text-shadow:0 2px 20px rgba(0,0,0,.3)}
.slide-inner p{font-size:clamp(15px,1.7vw,19px);color:#dbe6f5;margin-bottom:28px;max-width:36em}
.slide-inner .btn{padding:14px 32px;font-size:16px}
.slide-arrow{position:absolute;top:50%;transform:translateY(-50%);z-index:5;width:46px;height:60px;
  background:rgba(6,32,63,.4);color:#fff;border:none;font-size:30px;cursor:pointer;transition:background .2s;line-height:1}
.slide-arrow:hover{background:var(--red)}
.slide-arrow.prev{left:0}.slide-arrow.next{right:0}
.slide-dots{position:absolute;bottom:22px;left:50%;transform:translateX(-50%);z-index:5;display:flex;gap:10px}
.slide-dots button{width:32px;height:4px;border:none;background:rgba(255,255,255,.45);cursor:pointer;padding:0;transition:background .2s}
.slide-dots button.active{background:var(--red)}

/* ===== 能力全覆盖 ===== */
.coverage-section{background:var(--paper);border-top:3px solid var(--red)}
.cov{max-width:960px;margin:0 auto;display:grid;gap:16px}
.cov-block{display:flex;align-items:center;gap:20px;background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:20px 24px;box-shadow:var(--shadow-sm)}
.cov-label{flex-shrink:0;width:96px;font-size:14px;font-weight:800;color:#fff;background:var(--blue);border-radius:5px;padding:10px 0;text-align:center}
.cov-items{display:flex;flex-wrap:wrap;gap:12px}
.cov-chk{position:relative;padding:11px 18px 11px 42px;font-size:15px;font-weight:700;color:var(--blue-700);background:#f0f7ff;border:1px solid #d6e6fa;border-radius:6px}
.cov-chk::before{content:"✓";position:absolute;left:14px;top:50%;transform:translateY(-50%);width:19px;height:19px;line-height:19px;text-align:center;font-size:12px;font-weight:800;color:#fff;background:#1a9e57;border-radius:50%}
.cov-chk.strong{color:#fff;background:var(--blue);border-color:var(--blue);font-size:16px}
.cov-chk.strong::before{background:#fff;color:var(--blue)}
.cov-flow{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.cov-flow span{font-size:14.5px;font-weight:700;color:var(--blue-700);background:var(--paper);border:1px solid var(--line);border-radius:5px;padding:9px 15px}
.cov-flow i{color:var(--red);font-style:normal;font-weight:800}
.cov-concl{max-width:960px;margin:22px auto 0;text-align:center;background:var(--blue-deep);color:#fff;border-radius:var(--radius);
  padding:20px;font-size:clamp(16px,1.9vw,20px);font-weight:700;letter-spacing:.01em}
.cov-concl b{color:#ffd24a}

/* ===== 数据成就 ===== */
.stats{background:var(--blue-deep);color:#fff;padding:34px 0 26px}
.stats-inner{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.stat{text-align:center;border-right:1px solid rgba(255,255,255,.12)}
.stat:last-child{border-right:none}
.stat b{display:block;font-size:clamp(28px,4vw,44px);font-weight:800;color:#fff;line-height:1}
.stat b i{font-style:normal;font-size:.5em;color:var(--red);margin-left:2px;font-weight:700}
.stat span{display:block;font-size:14px;color:#a9c0dd;margin-top:8px}
.stats-note{text-align:center;font-size:11.5px;color:#6f89ad;margin-top:16px}

/* ===== 通用 SECTION ===== */
.section{padding:clamp(52px,7vw,88px) 0;position:relative}
.section-alt{background:var(--paper)}
.sec-head{max-width:820px;margin:0 auto clamp(32px,4vw,48px);text-align:center}
.sec-kicker{display:inline-block;font-size:14px;font-weight:700;color:var(--blue);letter-spacing:.1em;margin-bottom:12px}
.sec-head h2{font-size:clamp(23px,3.1vw,36px);color:var(--blue-700);letter-spacing:.01em;position:relative;display:inline-block;padding-bottom:16px}
.sec-head h2::after{content:"";position:absolute;left:50%;bottom:0;transform:translateX(-50%);width:46px;height:3px;background:var(--red)}
.sec-sub{font-size:clamp(15px,1.5vw,16.5px);color:var(--muted);max-width:46em;margin:14px auto 0}
.sec-head.light .sec-kicker{color:#7fb0e6}
.sec-head.light h2{color:#fff}
.sec-head.light .sec-sub{color:#b7cae2}

/* ===== 三大系统 ===== */
.sys-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.sys-card{background:var(--white);border:1px solid var(--line);border-top:3px solid var(--blue);border-radius:var(--radius);
  padding:30px 28px;box-shadow:var(--shadow-sm);transition:transform .3s,box-shadow .3s}
.sys-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-md);border-top-color:var(--red)}
.sys-ico{display:inline-flex;width:56px;height:56px;border-radius:50%;align-items:center;justify-content:center;
  background:linear-gradient(150deg,var(--blue),var(--blue-700));margin-bottom:18px}
.sys-ico svg{width:28px;height:28px;fill:none;stroke:#fff;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round}
.sys-card h3{font-size:20px;color:var(--blue-700);margin-bottom:10px}
.sys-card>p{font-size:14.5px;color:var(--muted);margin-bottom:16px}
.sys-card ul{list-style:none;margin:0;padding:0;border-top:1px solid var(--line-2);padding-top:14px}
.sys-card ul li{font-size:13.5px;color:var(--ink);padding-left:18px;position:relative;margin-bottom:8px}
.sys-card ul li::before{content:"";position:absolute;left:0;top:9px;width:7px;height:7px;background:var(--blue);border-radius:50%}

/* ===== 功能模块详情 ===== */
.mod-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.mod-card{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:24px 22px;box-shadow:var(--shadow-sm);
  transition:transform .3s,box-shadow .3s,border-color .3s}
.mod-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:var(--blue)}
.mod-head{display:flex;align-items:center;gap:12px;margin-bottom:14px;padding-bottom:12px;border-bottom:1px solid var(--line-2)}
.mod-no{flex-shrink:0;width:36px;height:36px;border-radius:6px;background:linear-gradient(150deg,var(--blue),var(--blue-700));color:#fff;font-weight:800;font-size:15px;display:flex;align-items:center;justify-content:center}
.mod-card h3{font-size:17px;color:var(--blue-700)}
.mod-card ul{list-style:none;margin:0;padding:0}
.mod-card li{position:relative;padding-left:16px;font-size:13px;color:var(--muted);margin-bottom:9px;line-height:1.65}
.mod-card li:last-child{margin-bottom:0}
.mod-card li::before{content:"";position:absolute;left:0;top:8px;width:6px;height:6px;background:var(--red);border-radius:50%}

/* ===== 深色区：全过程 ===== */
.section-dark{background:linear-gradient(160deg,var(--blue-700),var(--blue-deep));color:#cbd8ea;position:relative;overflow:hidden}
.section-dark::before{content:"";position:absolute;inset:0;pointer-events:none;opacity:.5;
  background-image:linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);background-size:48px 48px}
.section-dark>.wrap{position:relative}
.proc{list-style:none;margin:0 0 40px;padding:0;display:grid;grid-template-columns:repeat(5,1fr);gap:14px}
.proc li{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.14);border-radius:var(--radius);padding:22px 18px;position:relative}
.proc-no{font-size:14px;font-weight:800;color:var(--red);letter-spacing:.05em}
.proc li h3{font-size:17px;color:#fff;margin:8px 0 12px}
.proc-cap,.proc-ctl{font-size:12.5px;line-height:1.55;padding-left:16px;position:relative;margin-bottom:6px}
.proc-cap{color:#a9bde0}.proc-ctl{color:#d3e0f4}
.proc-cap::before{content:"";position:absolute;left:0;top:7px;width:7px;height:7px;border-radius:50%;background:#4a9df0}
.proc-ctl::before{content:"";position:absolute;left:0;top:7px;width:7px;height:7px;border-radius:50%;background:var(--red)}
.proc li:not(:last-child)::after{content:"";position:absolute;right:-9px;top:50%;width:13px;height:13px;border-top:2px solid rgba(120,170,255,.5);border-right:2px solid rgba(120,170,255,.5);transform:translateY(-50%) rotate(45deg);z-index:2}
/* 监控大屏视觉 */
.monitor{position:relative;margin:0 0 30px;border-radius:var(--radius);overflow:hidden;border:1px solid rgba(255,255,255,.18);box-shadow:var(--shadow-lg)}
.monitor img{width:100%;aspect-ratio:16/9;object-fit:cover;display:block}
.monitor figcaption{position:absolute;left:0;right:0;bottom:0;padding:16px 22px;font-size:15px;font-weight:600;color:#fff;
  background:linear-gradient(0deg,rgba(6,32,63,.9),transparent);text-align:center}
.monitor-ph-tip{display:none}
.monitor.ph{aspect-ratio:16/9;border:1.5px dashed rgba(255,255,255,.4);background:rgba(255,255,255,.05);display:flex;align-items:center;justify-content:center}
.monitor.ph figcaption{position:static;background:none;padding:0}
.monitor.ph .monitor-ph-tip{display:block;position:absolute;bottom:18px;left:0;right:0;text-align:center;font-size:12.5px;color:#9fb4d4}
/* 对标评分强调语 */
.score-callout{margin-top:28px;background:rgba(255,255,255,.06);border-left:4px solid var(--red);border-radius:0 var(--radius) var(--radius) 0;
  padding:18px 24px;font-size:clamp(15px,1.7vw,18px);line-height:1.7;color:#dbe6f5;text-align:center}
.score-callout b{color:#fff}
.score-callout b.hl{color:#ffd24a}
.loop{display:flex;flex-wrap:wrap;align-items:stretch;justify-content:center;gap:10px}
.loop-node{flex:1 1 180px;max-width:230px;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.16);border-radius:var(--radius);padding:18px 16px;text-align:center}
.loop-node b{display:block;font-size:15px;color:#fff;margin-bottom:6px}
.loop-node span{font-size:12.5px;color:#a9bde0}
.loop-arrow{align-self:center;font-size:13px;font-weight:700;color:var(--red);white-space:nowrap}

/* ===== 系统架构图 ===== */
.arch{max-width:980px;margin:0 auto;display:grid;gap:10px}
.arch-layer{display:flex;align-items:center;gap:18px;border-radius:var(--radius);padding:18px 22px;border:1px solid var(--line)}
.arch-layer.app{background:#eef5ff;border-color:#cfe2fa}
.arch-layer.mid{background:#fff3f3;border-color:#f3d2d2}
.arch-layer.dev{background:var(--blue-deep);border-color:transparent}
.arch-tag{flex-shrink:0;width:104px;font-size:14px;font-weight:800;color:#fff;background:var(--blue);border-radius:5px;padding:11px 0;text-align:center}
.arch-layer.mid .arch-tag{background:var(--red)}
.arch-layer.dev .arch-tag{background:#0a4489}
.arch-cells{display:flex;flex-wrap:wrap;gap:8px}
.arch-cells span{font-size:13.5px;font-weight:600;color:var(--blue-700);background:#fff;border:1px solid var(--line);border-radius:5px;padding:8px 14px}
.arch-layer.dev .arch-cells span{background:rgba(255,255,255,.1);border-color:rgba(255,255,255,.22);color:#dbe6f5}
.arch-arrows{display:flex;justify-content:center;gap:44px;font-size:12.5px;font-weight:700;color:var(--muted-2);padding:2px 0}
.arch-proto{text-align:center;font-size:13px;font-weight:700;color:var(--blue);background:var(--white);border:1px dashed var(--blue);border-radius:5px;padding:11px;letter-spacing:.02em}

/* ===== 应用场景 ===== */
.scene-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.scene{margin:0;border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow-sm);background:var(--white);transition:transform .3s,box-shadow .3s}
.scene:hover{transform:translateY(-4px);box-shadow:var(--shadow-md)}
.scene img{width:100%;aspect-ratio:16/10;object-fit:cover}
.scene figcaption{padding:14px 18px;font-size:14px;font-weight:600;color:var(--blue-700);text-align:center;border-top:2px solid var(--red)}

/* ===== 综合实力 ===== */
.strength-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.strength{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:28px 26px;box-shadow:var(--shadow-sm);position:relative;overflow:hidden;transition:transform .3s,box-shadow .3s}
.strength:hover{transform:translateY(-4px);box-shadow:var(--shadow-md)}
.st-n{position:absolute;top:14px;right:20px;font-size:32px;font-weight:800;color:var(--paper-2);line-height:1}
.strength h3{font-size:18px;color:var(--blue-700);margin-bottom:10px;padding-left:14px;position:relative}
.strength h3::before{content:"";position:absolute;left:0;top:3px;bottom:3px;width:4px;background:var(--red);border-radius:2px}
.strength p{font-size:14px;color:var(--muted)}

/* ===== 服务流程 ===== */
.steps{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(6,1fr);gap:12px}
.steps li{text-align:center;position:relative;background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:26px 14px;box-shadow:var(--shadow-sm)}
.step-n{display:inline-flex;width:46px;height:46px;border-radius:50%;background:linear-gradient(150deg,var(--blue),var(--blue-700));color:#fff;font-weight:800;font-size:19px;align-items:center;justify-content:center;margin-bottom:12px}
.steps li h3{font-size:15.5px;color:var(--blue-700);margin-bottom:6px}
.steps li p{font-size:12.5px;color:var(--muted)}
.steps li:not(:last-child)::after{content:"";position:absolute;right:-8px;top:46px;width:12px;height:12px;border-top:2px solid var(--line);border-right:2px solid var(--line);transform:rotate(45deg);z-index:2}

/* ===== FAQ ===== */
.faq-wrap{max-width:880px}
.faq-list{display:grid;gap:12px}
.faq-list details{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-sm);overflow:hidden}
.faq-list details[open]{border-color:var(--blue)}
.faq-list summary{list-style:none;cursor:pointer;padding:18px 22px;font-size:16px;font-weight:700;color:var(--blue-700);display:flex;justify-content:space-between;gap:12px}
.faq-list summary::-webkit-details-marker{display:none}
.faq-list summary::after{content:"+";font-size:22px;font-weight:400;color:var(--red);transition:transform .25s}
.faq-list details[open] summary::after{transform:rotate(45deg)}
.faq-list p{padding:0 22px 20px;font-size:14px;color:var(--muted)}

/* ===== 联系我们（电话 + 微信扫码）===== */
.contact-section{background:linear-gradient(160deg,var(--blue-700),var(--blue-deep));color:#cbd8ea}
.contact-simple{display:flex;align-items:center;justify-content:center;gap:clamp(28px,6vw,72px);flex-wrap:wrap;
  max-width:860px;margin:0 auto;padding:34px 30px;background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.14);border-radius:var(--radius)}
.cs-phone{text-align:center}
.cs-label{display:block;font-size:14px;color:#8fa8c9;margin-bottom:8px}
.cs-tel{display:block;font-size:clamp(34px,5vw,48px);font-weight:800;color:#fff;letter-spacing:.02em;line-height:1.15;margin-bottom:10px}
.cs-tel:hover{color:#7fb0e6}
.cs-sub{display:block;font-size:13px;color:#8fa8c9}
.cs-sub em{font-style:normal;color:#6f89ad;font-size:12px}
.cs-divider{width:1px;align-self:stretch;background:rgba(255,255,255,.16)}
.cs-wechat{text-align:center}
.wechat-slot{margin:0 auto 10px;width:150px;height:150px;border-radius:var(--radius);overflow:hidden;background:#fff;display:flex;align-items:center;justify-content:center;text-align:center}
.wechat-slot img{width:100%;height:100%;object-fit:contain}
.wechat-slot .wq-tip{display:none}
.wechat-slot.ph{border:1px dashed rgba(255,255,255,.4);background:rgba(255,255,255,.05)}
.wechat-slot.ph .wq-tip{display:block;font-size:12.5px;color:#9fb4d4;line-height:1.6}
.cs-addr{text-align:center;font-size:13.5px;color:#8fa8c9;margin-top:22px}
.cs-addr em{font-style:normal;font-size:12px;color:#6f89ad}

/* ===== 页脚 ===== */
.site-footer{background:var(--blue-navy);color:#8fa4c2;padding:52px 0 22px}
.footer-inner{display:grid;grid-template-columns:1.3fr 2fr;gap:40px;padding-bottom:32px;border-bottom:1px solid rgba(255,255,255,.1)}
.footer-brand .brand{color:#fff;margin-bottom:16px}
.footer-brand .brand-mark{color:#fff}
.footer-brand .brand-text i{color:#7f95b3}
.footer-brand p{font-size:13.5px;color:#8398b6;line-height:1.8}
.footer-nav{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.footer-nav h4{font-size:13px;color:#fff;margin-bottom:14px}
.footer-nav a{display:block;font-size:14px;color:#8398b6;padding:5px 0;transition:color .2s}
.footer-nav a:hover{color:#7fb0e6}
.footer-bottom{display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;padding-top:18px;font-size:12.5px;color:#6f85a4}
.footer-bottom a:hover{color:#7fb0e6}
.footer-bottom em{font-style:normal;color:#5c718e}

/* ===== 悬浮按钮 ===== */
.float-cta{position:fixed;right:20px;bottom:80px;z-index:120;display:inline-flex;flex-direction:column;align-items:center;gap:3px;
  background:var(--blue);color:#fff;padding:13px 11px;border-radius:8px;box-shadow:0 12px 26px -8px rgba(11,78,162,.6);font-size:12.5px;font-weight:700;transition:background .2s,transform .2s}
.float-cta svg{width:23px;height:23px;fill:none;stroke:#fff;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.float-cta:hover{background:var(--blue-600);transform:translateY(-2px)}
.to-top{position:fixed;right:20px;bottom:24px;z-index:120;width:46px;height:46px;border:none;border-radius:8px;background:var(--blue-deep);color:#fff;font-size:20px;cursor:pointer;opacity:0;visibility:hidden;transition:opacity .3s,background .2s}
.to-top.show{opacity:1;visibility:visible}
.to-top:hover{background:var(--red)}

/* ===== 动画 ===== */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .7s cubic-bezier(.2,.7,.2,1),transform .7s cubic-bezier(.2,.7,.2,1)}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;transition:none}.slide{transition:none}}

/* ===== 响应式 ===== */
@media (max-width:1180px){
  .site-nav{gap:0}
  .site-nav a{padding:8px 10px;font-size:14.5px}
}
/* 平板及以下：汉堡菜单 */
@media (max-width:1000px){
  .site-header{overflow:visible}
  .site-nav{position:absolute;left:0;right:0;top:100%;flex-direction:column;background:var(--white);
    border-bottom:1px solid var(--line);padding:8px 22px 16px;transform:translateY(-140%);transition:transform .3s;box-shadow:var(--shadow-md);margin:0;z-index:-1}
  .site-nav.open{transform:translateY(0)}
  .site-nav a{padding:13px 0;border-bottom:1px solid var(--line-2);width:100%;font-size:15px}
  .site-nav a::after{display:none}
  .nav-toggle{display:flex}
}
@media (max-width:900px){
  .stats-inner{grid-template-columns:repeat(2,1fr);gap:24px 20px}
  .stat:nth-child(2){border-right:none}
  .sys-grid,.scene-grid{grid-template-columns:1fr}
  .mod-grid{grid-template-columns:1fr 1fr}
  .cov-block{flex-direction:column;align-items:flex-start;gap:14px}
  .cov-label{width:auto;padding:7px 18px}
  .arch-layer{flex-direction:column;align-items:flex-start;gap:12px}
  .arch-tag{width:auto;padding:7px 18px}
  .strength-grid{grid-template-columns:1fr 1fr}
  .proc{grid-template-columns:repeat(2,1fr)}
  .proc li:not(:last-child)::after{display:none}
  .steps{grid-template-columns:repeat(3,1fr)}
  .steps li:not(:last-child)::after{display:none}
  .footer-inner{grid-template-columns:1fr}
}
@media (max-width:760px){
  .utility-bar .util-welcome{display:none}
  .util-inner{justify-content:center}
  .site-header .btn-nav{display:none}
  .slide-inner{text-align:left}
}
@media (max-width:540px){
  .stats-inner{grid-template-columns:1fr;gap:18px}
  .stat{border-right:none;border-bottom:1px solid rgba(255,255,255,.12);padding-bottom:16px}
  .stat:last-child{border-bottom:none}
  .strength-grid,.steps,.mod-grid{grid-template-columns:1fr}
  .proc{grid-template-columns:1fr}
  .footer-nav{grid-template-columns:1fr 1fr}
  .footer-bottom{flex-direction:column}
  .slide-arrow{display:none}
}

/* ===== 登录入口选择弹窗(一套账号,四个门户) ===== */
.login-modal{position:fixed;inset:0;z-index:400;display:flex;align-items:center;justify-content:center}
.login-modal[hidden]{display:none}
.lm-mask{position:absolute;inset:0;background:rgba(4,14,34,.62)}
.lm-card{position:relative;width:min(480px,calc(100% - 40px));max-height:calc(100vh - 60px);overflow-y:auto;
  background:#fff;border-radius:10px;padding:30px 30px 26px;box-shadow:var(--shadow-lg)}
.lm-close{position:absolute;top:10px;right:14px;border:0;background:none;font-size:26px;line-height:1;color:var(--muted-2);cursor:pointer}
.lm-close:hover{color:var(--ink)}
.lm-card h3{font-size:20px;color:var(--ink)}
.lm-sub{margin:6px 0 18px;font-size:13.5px;color:var(--muted)}
.lm-doors{display:flex;flex-direction:column;gap:10px}
.lm-door{display:flex;flex-direction:column;gap:2px;padding:12px 16px;border:1px solid var(--line);
  border-left:4px solid var(--blue);border-radius:6px;transition:box-shadow .2s,transform .2s}
.lm-door:hover{box-shadow:var(--shadow-md);transform:translateY(-1px)}
.lm-door b{font-size:15px;color:var(--ink)}
.lm-door span{font-size:12.5px;color:var(--muted)}
.lm-door i{font-style:normal;font-size:12px;color:var(--blue);margin-top:2px}
.door-mes{border-left-color:#f0862c}
.door-wms{border-left-color:#0e9f9a}
.door-bim{border-left-color:#7b5ce0}
.door-mes i{color:#d97318}.door-wms i{color:#0b8a85}.door-bim i{color:#6a4de0}