/* Huakong — original, dependency-free engineering website design system. */
/* Source-backed editorial expansion. */
.application-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}.application-card{border:1px solid #d9e2df;padding:30px;background:#f5f7f4}.application-card h3{font-size:26px;margin:20px 0 15px}.application-card p{font-size:15px}.editorial-links{display:grid;gap:14px}.editorial-links .text-link{justify-content:space-between;line-height:1.6;gap:16px}.resource-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;margin-bottom:40px}.resource-card{background:#fff;border:1px solid #d9e2df;padding:30px;display:flex;flex-direction:column}.resource-card h3{font-size:27px;margin:25px 0 18px}.resource-card h3 a,.experience-grid h3 a{text-decoration:none}.resource-card p{font-size:15px}.resource-card>.text-link{margin-top:auto}.review-checks{display:grid;gap:22px;margin:30px 0 44px}.review-checks article{border-top:1px solid #d9e2df;padding-top:22px}.review-checks h3{font-size:22px;margin-bottom:12px}.review-checks p{font-size:15px;margin-bottom:0}.service-depth>h2{margin-top:40px}.related-evidence-title{margin-top:38px}.case-snapshot{margin:32px 0;padding:25px;background:#edf3ef;border-left:3px solid #146f61}.case-snapshot h3{font-size:22px}.case-snapshot dl{margin:0}.case-snapshot dl>div{padding:13px 0;border-top:1px solid #d0ddd6}.case-snapshot dt{font-weight:600;font-size:12px;color:#365c4e}.case-snapshot dd{margin:5px 0 0;font-size:15px;line-height:1.65}.experience-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:30px}.experience-grid article{border-top:1px solid #b9cfc3;padding-top:25px}.experience-grid h3{font-size:23px}.experience-grid p{font-size:14px}.process-checks{grid-template-columns:1fr 1fr;gap:28px 40px}.guide-layout{display:grid;grid-template-columns:260px minmax(0,1fr);gap:70px;align-items:start}.guide-nav{position:sticky;top:125px}.guide-nav>a{display:block;font-size:13px;line-height:1.6;padding:12px 0;text-decoration:none;border-bottom:1px solid #d9e2df}.guide-body{max-width:780px;min-width:0}.guide-body>section{margin-bottom:55px;padding-bottom:40px;border-bottom:1px solid #d9e2df;scroll-margin-top:115px}.guide-body h2{font-size:36px;margin-top:18px}.guide-body .small-note{margin-top:22px}.source-link{display:block;font-size:12px;margin-top:12px}.page-resources .page-hero .lead{max-width:900px}.page-guide .page-hero .text-link{margin-top:25px}.illustration-robotic{background:#173e3a}.illustration-tunnel{background:#24384b}.illustration-sludge{background:#27403c}.project-card .control-illustration{min-height:250px}.project-photo-grid:has(>figure:only-child){grid-template-columns:minmax(0,800px);justify-content:center}
@media(max-width:1050px){.guide-layout{grid-template-columns:210px minmax(0,1fr);gap:35px}.experience-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.resource-card{padding:23px}}
@media(max-width:700px){.application-grid,.resource-grid,.experience-grid,.process-checks{grid-template-columns:1fr}.guide-layout{grid-template-columns:1fr;gap:35px}.guide-nav{position:static}.guide-body h2{font-size:30px}.application-card,.resource-card{padding:25px}.case-snapshot{padding:20px}.resource-card h3{font-size:25px}.project-card .control-illustration{min-height:260px}.editorial-links .text-link{font-size:13px}.guide-body .button-row{align-items:stretch}.guide-body .button{max-width:100%}}

/* Reviewed image galleries and a lightweight buyer brief; no new framework. */
.project-visual picture{display:block;background:#0c2433}.project-visual img{width:100%;height:250px;object-fit:contain;padding:12px}.project-visual:focus-visible{outline-color:var(--mint);outline-offset:-4px}.related-photo picture{display:block;background:#e9efeb;padding:18px}.related-photo img{width:100%;height:340px;object-fit:contain}.related-photo .small-note{margin:12px 0 0}.gallery-intro{display:flex;justify-content:space-between;gap:20px;align-items:baseline}.gallery-intro p{font-size:12px}.gallery-intro .eyebrow{white-space:nowrap}.project-photo-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}.project-photo-grid figure{margin:0;min-width:0}.project-photo-link{display:block;background:#102b3b;position:relative;border:1px solid #bbcfc7;padding:18px;text-decoration:none}.project-photo-link img{width:100%;height:390px;object-fit:contain}.photo-enlarge{position:absolute;bottom:18px;right:18px;background:#fff;color:#102b3b;padding:9px 14px;font-size:12px;border:1px solid #ccd8d3}.project-photo-grid figcaption{font-size:12px;line-height:1.75;color:#536775;margin-top:14px}.project-gallery{margin-top:30px}#photo-dialog{width:min(1100px,94vw);max-width:94vw;max-height:93vh;padding:24px;border:1px solid #96b6a8;border-radius:6px;background:#f5f7f4;color:#102b3b}#photo-dialog::backdrop{background:#04141ee8}.photo-dialog-bar{display:flex;gap:25px;align-items:center;justify-content:space-between;margin-bottom:18px}.photo-dialog-bar h2{font-size:22px;margin:0}.photo-dialog-bar button{min-width:100px;min-height:44px;flex-shrink:0}#photo-dialog-image{width:auto;height:auto;max-width:100%;max-height:65vh;object-fit:contain;margin:0 auto;background:#e9efeb}#photo-dialog-caption{font-size:13px;margin:18px 0 0}.brief-panel{display:flex;gap:35px;align-items:center;justify-content:space-between;padding:30px;background:#f1f5f1;border-top:3px solid #146f61}.brief-panel h2{font-size:27px;max-width:650px}.brief-panel p{font-size:14px;margin:0}.brief-panel .button{flex-shrink:0}.brief-download{font-size:12px}.primary-nav>a[aria-current=location]{color:#146f61}
@media(max-width:700px){.project-photo-grid{grid-template-columns:1fr;gap:28px}.project-photo-link img{height:320px}.gallery-intro{display:block}.gallery-intro .eyebrow{margin-bottom:8px}.project-visual img{height:260px}.photo-dialog-bar{gap:12px}.photo-dialog-bar h2{font-size:17px}#photo-dialog{padding:16px}.brief-panel{display:block;padding:25px}.brief-panel .button{margin-top:22px}.related-photo img{height:290px}}

:root{--ink:#102b3b;--muted:#536775;--navy:#0c2433;--navy-2:#153745;--green:#146f61;--mint:#89dfc7;--paper:#f5f7f4;--line:#d9e2df;--white:#fff;--warning:#6d491b;--danger:#a52e32;--max:1200px;--radius:6px}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:110px}body{margin:0;color:var(--ink);font-family:"Segoe UI",Arial,Helvetica,sans-serif;font-size:16px;line-height:1.65;background:#fff;-webkit-font-smoothing:antialiased}a{color:inherit;text-underline-offset:4px}button,input,select,textarea{font:inherit}button,a,input,select,textarea,summary{-webkit-tap-highlight-color:transparent}button,summary{cursor:pointer}button{color:inherit}img{max-width:100%;height:auto;display:block}svg{display:block}h1,h2,h3,p,ul,ol,figure,dl{margin-top:0}h1,h2,h3{line-height:1.12;letter-spacing:-.035em;font-weight:600}h1{font-size:clamp(44px,5.2vw,72px)}h2{font-size:clamp(32px,3.4vw,46px);margin-bottom:24px}h3{font-size:23px;letter-spacing:-.025em}p{margin-bottom:20px;color:var(--muted)}strong{font-weight:600}button:disabled{cursor:not-allowed;opacity:.6}a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid var(--green);outline-offset:5px}::selection{background:var(--mint);color:var(--navy)}[hidden]{display:none!important}
.wrap{width:calc(100% - 80px);max-width:var(--max);margin-inline:auto}.narrow{max-width:880px}.section{padding:100px 0}.section-soft{background:var(--paper)}.section-dark{background:var(--navy);color:#fff}.section-dark p{color:#b7c9cf}.eyebrow,.number,.aside-label{font-size:11px;letter-spacing:.15em;text-transform:uppercase;font-weight:700;line-height:1.6}.eyebrow{color:var(--green);margin-bottom:22px}.number{display:block;color:var(--green)}.body-lead{font-size:20px;line-height:1.65}.lead{font-size:21px;line-height:1.65;max-width:780px}.small-note,.image-source,.diagram-note,.case-visual-note{font-size:12px;line-height:1.65}.text-link{display:inline-flex;align-items:center;gap:24px;color:var(--green);font-size:14px;font-weight:600;text-decoration:none;border-bottom:1px solid transparent;padding-bottom:4px}.text-link:hover{border-color:currentColor}.text-link span,.button span{font-size:22px;line-height:1}.button{display:inline-flex;gap:22px;justify-content:center;align-items:center;min-height:54px;padding:14px 23px;border:1px solid var(--green);border-radius:3px;background:var(--green);color:#fff;font-weight:600;font-size:14px;line-height:1.5;text-decoration:none;transition:background .18s,border-color .18s,transform .18s}.button:hover:not(:disabled){background:#0f584d;border-color:#0f584d;transform:translateY(-1px)}.button-secondary{color:var(--ink);border-color:#b4c4c4;background:transparent}.button-secondary:hover:not(:disabled){background:#eaf2ee;border-color:var(--green)}.button-row{display:flex;align-items:center;gap:14px;flex-wrap:wrap}.section-heading{display:grid;grid-template-columns:1.1fr .85fr;gap:90px;align-items:end;margin-bottom:48px}.section-heading h2{margin:0;max-width:600px}.section-heading>p{margin-bottom:4px;max-width:480px}.section-end{margin-top:38px;display:flex;justify-content:flex-end}.split-content,.related-grid{display:grid;grid-template-columns:1fr 1fr;gap:90px;align-items:center}
.preview-bar{background:#e9efea;color:#3f554a;text-align:center;font-size:11px;letter-spacing:.035em;padding:7px 16px;line-height:1.5}.preview-bar span{border-left:1px solid #a9bbae;margin-left:15px;padding-left:15px}.skip-link{position:fixed;left:20px;top:-100px;background:#fff;padding:12px 18px;z-index:100}.skip-link:focus{top:12px}.site-header{position:sticky;top:0;background:rgba(255,255,255,.98);z-index:50;border-bottom:1px solid #e9eeeb}.header-inner{display:flex;align-items:center;justify-content:space-between;min-height:88px;gap:24px}.brand{display:inline-flex;align-items:center;gap:12px;text-decoration:none;line-height:1;flex-shrink:0}.brand>span{font-size:21px;font-weight:750;letter-spacing:.12em}.brand small{display:block;font-size:8px;letter-spacing:.16em;margin-top:8px;font-weight:600}.primary-nav{display:flex;align-items:center;gap:26px}.primary-nav>a{font-size:13px;font-weight:600;text-decoration:none;white-space:nowrap}.primary-nav>a[aria-current=page]:not(.nav-contact),.primary-nav>a:hover:not(.nav-contact){color:var(--green)}.primary-nav .nav-contact{background:var(--navy);color:#fff;padding:12px 18px;border-radius:3px}.nav-contact span{margin-left:18px;font-size:20px}.primary-nav .language-link{font-size:12px;color:var(--muted)}.menu-toggle{display:none}
.hero{background:var(--navy);color:#fff;position:relative;overflow:hidden}.hero::before{content:"";position:absolute;inset:0;pointer-events:none;background-image:linear-gradient(#ffffff04 1px,transparent 1px),linear-gradient(90deg,#ffffff04 1px,transparent 1px);background-size:80px 80px}.hero-grid{display:grid;grid-template-columns:1.1fr .92fr;gap:72px;align-items:center;padding-top:72px;padding-bottom:66px;position:relative}.hero .eyebrow{color:var(--mint);font-size:10px;letter-spacing:.14em}.hero h1{font-size:clamp(48px,5.3vw,76px);line-height:1.04;margin-bottom:28px;letter-spacing:-.045em}.hero h1>span{color:var(--mint)}.hero-lead{font-size:18px;line-height:1.75;color:#c2d0d4;max-width:500px;margin-bottom:31px}.hero .button{background:var(--mint);color:var(--navy);border-color:var(--mint)}.hero .button:hover{background:#aeeddc;border-color:#aeeddc}.hero .button-secondary{background:transparent;color:#fff;border-color:#537078}.hero .button-secondary:hover{background:#1b4050;border-color:#a3bac0}.hero-footnote{display:flex;align-items:center;gap:10px;font-size:11px;color:#afc2c9;margin-top:38px;flex-wrap:wrap}.fine-dot{width:6px;height:6px;border-radius:50%;background:var(--mint)}.hero-separator{padding-inline:5px;color:#5c7e8b}.hero-visual{align-self:center;border-top:2px solid var(--mint)}.photo-label{display:flex;align-items:center;justify-content:space-between;font-size:9px;letter-spacing:.16em;padding:16px 0;color:#b4c8ce}.cabinet-photo{padding:10px;background:#193f4d;border:1px solid #41606a}.cabinet-photo img{width:100%;aspect-ratio:540/458;object-fit:cover}.photo-bottom{display:flex;justify-content:space-between;align-items:center;margin-top:20px;padding-bottom:17px;border-bottom:1px solid #36525d}.photo-bottom strong{font-size:20px;line-height:1.3;letter-spacing:-.01em}.photo-bottom>span{font-size:36px;color:var(--mint)}.image-source{color:#9cb4bc;font-size:10px;margin-top:13px;margin-bottom:0}.capability-strip{border-bottom:1px solid var(--line);background:#edf2ee}.capability-strip .wrap{display:grid;grid-template-columns:repeat(4,1fr);padding-block:22px}.capability-strip span{font-size:12px;text-align:center;border-right:1px solid #ccd7d0;font-weight:600}.capability-strip span:last-child{border:0}
.service-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:23px}.service-card{border:1px solid var(--line);padding:30px;display:flex;flex-direction:column;background:#fff;position:relative;min-width:0}.service-card .number{font-size:10px}.service-card h3{margin:23px 0 15px;font-size:26px;max-width:270px}.service-card h3 a{text-decoration:none}.service-card p{font-size:15px;line-height:1.7;margin-bottom:30px;max-width:300px}.service-card>.text-link{align-self:flex-start;margin-top:auto}.service-symbol{height:74px;width:94px;border:1px solid #b8cbc5;margin-top:35px;position:relative;display:flex;gap:8px;padding:14px;align-items:center;background:#f3f8f5}.service-symbol i{display:block;background:#7dac9f;width:10px;height:26px;border-bottom:5px solid var(--navy)}.service-symbol::before,.service-symbol::after{content:"";position:absolute;background:#a4bdb5;height:1px;width:18px;left:-18px;top:25px}.service-symbol::after{left:auto;right:-18px;top:48px}.symbol-scada{width:110px;height:70px;border:3px solid #7ca496;border-bottom:10px solid #7ca496;gap:4px;padding:9px;align-items:flex-end}.symbol-scada i{border:0;background:var(--green);width:14px;height:18px}.symbol-scada i:nth-child(2){height:28px}.symbol-scada i:nth-child(3){height:22px}.symbol-scada i:nth-child(4){height:35px}.symbol-panels{height:81px;width:81px;display:grid;grid-template-columns:1fr 1fr;padding:9px;gap:7px}.symbol-panels i{width:100%;height:20px;background:#b5d5c9;border-bottom:6px solid #496e60}.service-card:hover{border-color:#8cb4a5}
.project-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;align-items:stretch}.project-card{background:#fff;border:1px solid var(--line);display:flex;flex-direction:column;min-width:0}.project-visual{display:block;text-decoration:none}.project-card-body{padding:28px;display:flex;flex-direction:column;flex:1}.project-card .eyebrow{font-size:9px;margin-bottom:13px}.project-card h3{font-size:24px;margin-bottom:15px}.project-card h3 a{text-decoration:none}.project-card p:not(.eyebrow){font-size:14px;line-height:1.75}.project-card .text-link{font-size:13px;gap:14px;margin-top:auto;align-self:flex-start}.control-illustration{background:#102d3b;color:#cbe1e5;padding:20px 18px 12px;position:relative;overflow:hidden}.control-illustration::before{content:"";position:absolute;inset:0;background-image:linear-gradient(#ffffff06 1px,transparent 1px),linear-gradient(90deg,#ffffff06 1px,transparent 1px);background-size:24px 24px;pointer-events:none}.illustration-top,.illustration-bottom{display:flex;justify-content:space-between;align-items:center;position:relative;font-size:8px;letter-spacing:.12em;gap:8px}.illustration-top{color:#9ebac5}.illustration-code{color:var(--mint)}.illustration-bottom{border-top:1px solid #48626b;padding-top:12px;color:#a6bfc6;font-size:7px}.illustration-bottom>span:last-child{font-size:17px}.control-chain{position:relative;display:flex;align-items:center;justify-content:center;padding:25px 0}.chain-node{width:27%;min-height:109px;border:1px solid #608895;background:#163b49;text-align:center;padding:14px 4px 11px;z-index:1}.chain-node strong{display:block;font-size:10px;letter-spacing:.08em;color:#d1f0e7;margin-top:9px}.chain-node>span{display:block;font-size:7px;margin-top:3px;line-height:1.4;color:#aac4cc}.chain-link{width:9.5%;height:1px;background:#7eceb5;position:relative}.chain-link:after{content:"";position:absolute;right:0;top:-2px;width:5px;height:5px;border-top:1px solid #7eceb5;border-right:1px solid #7eceb5;transform:rotate(45deg)}.node-glyph{height:26px;display:flex;align-items:end;justify-content:center;gap:4px}.node-glyph b{display:block;width:6px;background:#6eac9f;height:16px}.node-glyph b:nth-child(2){height:25px}.glyph-1{border:1px solid #85b3af;width:32px;padding:5px;margin:auto;align-items:center;gap:3px}.glyph-1 b,.glyph-1 b:nth-child(2){width:4px;height:9px}.glyph-2{border:1px solid #85b3af;width:35px;height:25px;margin:auto;padding:5px;gap:3px}.glyph-2 b{width:5px;height:7px}.glyph-2 b:nth-child(2){height:12px}.illustration-pumping{background:#163846}.illustration-conveyor{background:#213634}.illustration-conveyor .chain-node{background:#274942;border-color:#7b9a89}.illustration-scada{background:#152c47}.illustration-scada .chain-node{background:#203f57;border-color:#587d9b}.illustration-large{padding:28px 38px 20px}.illustration-large .illustration-top{font-size:10px}.illustration-large .control-chain{max-width:720px;margin:auto;padding:38px 0}.illustration-large .chain-node{min-height:130px;padding:22px 10px}.illustration-large .chain-node strong{font-size:13px;margin-top:17px}.illustration-large .chain-node>span{font-size:10px}.illustration-large .illustration-bottom{font-size:9px}
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.breadcrumbs{display:flex;align-items:center;gap:12px;flex-wrap:wrap;font-size:11px;color:#687e86;margin-bottom:43px}.breadcrumbs a{text-decoration:none}.breadcrumbs a:hover{color:var(--green)}.page-hero{background:var(--paper);border-bottom:1px solid var(--line);padding:35px 0 70px}.page-hero:not(:has(.breadcrumbs)){padding-top:75px}.page-hero h1{max-width:970px;font-size:clamp(42px,4.4vw,63px);margin-bottom:27px}.page-hero .eyebrow{margin-bottom:22px}.page-hero .lead{margin-bottom:0}.detail-grid{display:grid;grid-template-columns:1.6fr 1fr;gap:80px;align-items:start}.detail-grid>div>h2{font-size:34px}.feature-grid{display:grid;grid-template-columns:1fr 1fr;gap:35px 28px;margin-top:36px}.feature-block{border-top:1px solid var(--line);padding-top:21px}.feature-block h3{font-size:23px;margin-top:23px;margin-bottom:15px}.feature-block p{font-size:15px}.content-block{margin-top:55px}.content-block h2{font-size:34px}.check-list{list-style:none;padding:0;margin:24px 0 28px}.check-list li{padding:11px 0 11px 25px;position:relative;font-size:15px;line-height:1.65;border-bottom:1px solid var(--line)}.check-list li::before{content:"+";font-size:15px;color:var(--green);position:absolute;left:0;top:11px}.scope-note{padding:27px 30px;background:#f1f5f1;border-left:3px solid #97b9a9;margin-top:33px}.scope-note strong{display:block;font-size:14px;margin-bottom:12px}.scope-note p{font-size:14px;line-height:1.8;margin-bottom:12px}.scope-note p:last-child{margin:0}.detail-aside{padding:30px;background:#f1f5f1;border-top:3px solid var(--green)}.detail-aside h2{font-size:27px;margin:20px 0}.aside-label{font-size:10px;color:var(--green)}.detail-aside li{font-size:13px}.detail-aside .button{width:100%;font-size:13px}.detail-aside .small-note{margin-top:17px;margin-bottom:0}.related-grid{gap:85px}.related-grid h2{font-size:40px}.project-filters{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:40px}.project-filters button{padding:10px 18px;font-size:12px;background:white;border:1px solid #cddbd4;border-radius:2px;font-weight:600}.project-filters button span{margin-left:15px;color:var(--green);font-size:10px}.project-filters button[aria-pressed=true]{background:var(--navy);color:#fff;border-color:var(--navy)}.project-filters button[aria-pressed=true] span{color:var(--mint)}.evidence-note{font-size:12px;border-top:1px solid var(--line);margin-top:35px;padding-top:22px;color:#64796e}
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@media(min-width:1500px){.hero-grid{gap:100px}.hero h1{font-size:80px}}
@media(max-width:1150px){.primary-nav{gap:17px}.primary-nav>a{font-size:12px}.brand>span{font-size:18px}.brand small{font-size:7px}.hero-grid{gap:42px}.hero h1{font-size:65px}.hero .button{font-size:12px;padding-inline:18px;gap:15px}.section-heading{gap:50px}.system-grid{gap:55px}.case-body-grid{gap:55px}.contact-grid{gap:45px}.detail-grid{gap:45px}.service-card{padding:25px}.project-card-body{padding:24px}.footer-top{gap:28px}}
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