:root {
  --ink: #132f38; --muted: #63777d; --line: #d8e6e5; --canvas: #f4f8f7; --surface: #fff;
  --surface-soft: #edf6f3; --brand: #08766f; --brand-deep: #07595a; --brand-soft: #dff3ed;
  --water: #2582a6; --building: #c77d32; --municipal: #337465; --power: #6860c5;
  --shadow-sm: 0 8px 28px rgba(11,48,55,.08); --shadow-lg: 0 28px 78px rgba(8,45,53,.16);
  --radius: 18px; --container: 1180px; --ease-out: cubic-bezier(.16,1,.3,1);
}
*,*::before,*::after{box-sizing:border-box} html{scroll-behavior:smooth}
body{margin:0;color:var(--ink);background:radial-gradient(circle at 8% 0,rgba(8,118,111,.09),transparent 26rem),linear-gradient(180deg,#fbfdfc 0,var(--canvas) 68rem,#f8fbfa 100%);font-family:"Microsoft YaHei UI","PingFang SC","Noto Sans CJK SC",system-ui,sans-serif;-webkit-font-smoothing:antialiased}
body.no-scroll{overflow:hidden} img{display:block;max-width:100%} a{color:inherit;text-decoration:none} button,input,select{font:inherit} button{color:inherit}:focus-visible{outline:3px solid rgba(8,118,111,.26);outline-offset:3px}
.container{width:min(var(--container),calc(100% - 40px));margin-inline:auto}
.site-nav{position:sticky;top:0;z-index:80;border-bottom:1px solid rgba(216,230,229,.78);background:rgba(251,253,252,.9);backdrop-filter:blur(18px)}
.nav-inner{min-height:70px;display:flex;align-items:center;justify-content:space-between;gap:22px}.brand{min-width:0;display:inline-flex;align-items:center;gap:10px;font-size:17px;font-weight:800}
.brand-mark{width:38px;height:38px;display:grid;place-items:center;flex:0 0 38px;color:#fff;border-radius:11px;background:linear-gradient(145deg,#0c8d82,#07595a);box-shadow:0 8px 18px rgba(8,118,111,.22)}
.nav-links{display:flex;align-items:center;gap:4px}.nav-links a{min-height:40px;padding:0 13px;display:inline-flex;align-items:center;border-radius:9px;color:#4f666c;font-size:14px;font-weight:650}.nav-links a:hover,.nav-links a.active{color:var(--brand-deep);background:var(--brand-soft)}.nav-cta{margin-left:8px;color:#fff!important;background:var(--brand)!important}
.nav-toggle{width:44px;height:44px;display:none;place-items:center;border:1px solid var(--line);border-radius:11px;background:#fff}.nav-toggle span,.nav-toggle span::before,.nav-toggle span::after{width:19px;height:2px;display:block;background:var(--ink);border-radius:2px;content:""}.nav-toggle span{position:relative}.nav-toggle span::before{position:absolute;top:-6px}.nav-toggle span::after{position:absolute;top:6px}
.hero{padding:74px 0 62px;overflow:hidden}.hero-grid{display:grid;grid-template-columns:minmax(0,.92fr) minmax(540px,1.08fr);align-items:center;gap:58px}.eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--brand);font-size:13px;font-weight:800;letter-spacing:.1em}.eyebrow::before{width:24px;height:2px;content:"";background:currentColor}
.hero h1,.page-hero h1{margin:18px 0;max-width:820px;font-size:clamp(42px,5.3vw,72px);line-height:1.08;letter-spacing:-.045em}.hero h1 span{color:var(--brand)}.hero-copy{margin:0;max-width:620px;color:var(--muted);font-size:18px;line-height:1.85}.hero-actions{margin-top:28px;display:flex;align-items:center;flex-wrap:wrap;gap:10px}
.btn{min-height:48px;padding:0 20px;display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid var(--line);border-radius:11px;background:#fff;font-size:15px;font-weight:750;box-shadow:0 6px 16px rgba(9,46,54,.06)}.btn-primary{color:#fff;border-color:var(--brand);background:var(--brand);box-shadow:0 12px 24px rgba(8,118,111,.2)}.btn-quiet{color:var(--brand-deep);background:#fff}.btn-lg{min-height:54px;padding-inline:25px}.hero-note{margin-top:14px;color:#789096;font-size:12px}
.profession-pills{margin-top:26px;display:flex;flex-wrap:wrap;gap:8px}.profession-pill{min-height:34px;padding:0 11px;display:inline-flex;align-items:center;gap:7px;border:1px solid var(--line);border-radius:999px;background:rgba(255,255,255,.72);font-size:13px;font-weight:700}.profession-pill i{width:8px;height:8px;border-radius:50%;background:currentColor}.is-water{color:var(--water)}.is-building{color:var(--building)}.is-municipal{color:var(--municipal)}.is-power{color:var(--power)}
.product-visual{position:relative;min-height:530px}.visual-glow{position:absolute;inset:8% 5% 0;border-radius:50%;background:radial-gradient(circle,rgba(8,118,111,.24),rgba(8,118,111,0) 68%);filter:blur(18px)}
.desktop-frame{position:absolute;left:0;top:34px;width:92%;overflow:hidden;border:1px solid #c7d8d7;border-radius:19px;background:#fff;box-shadow:var(--shadow-lg);transform:perspective(1400px) rotateY(-4deg) rotateX(1deg);transform-origin:center}.frame-bar{height:34px;padding:0 13px;display:flex;align-items:center;gap:6px;border-bottom:1px solid var(--line);background:#f7faf9}.frame-bar i{width:8px;height:8px;border-radius:50%;background:#c7d5d4}.frame-bar span{margin-left:6px;color:#809397;font-size:11px}.desktop-frame img{width:100%;aspect-ratio:16/9.35;object-fit:cover;object-position:top}
.phone-frame{position:absolute;right:0;bottom:0;width:176px;padding:7px;border:1px solid rgba(255,255,255,.56);border-radius:28px;background:#15383f;box-shadow:0 24px 48px rgba(5,38,46,.25)}.phone-frame::before{position:absolute;top:10px;left:50%;width:52px;height:14px;content:"";transform:translateX(-50%);border-radius:10px;background:#15383f}.phone-frame img{width:100%;aspect-ratio:9/18.7;object-fit:cover;object-position:top;border-radius:22px}
.floating-proof{position:absolute;left:24px;bottom:8px;padding:11px 14px;display:flex;align-items:center;gap:9px;border:1px solid rgba(255,255,255,.72);border-radius:12px;background:rgba(255,255,255,.88);backdrop-filter:blur(16px);box-shadow:var(--shadow-sm);font-size:12px;font-weight:750}.floating-proof b{width:30px;height:30px;display:grid;place-items:center;color:#fff;border-radius:9px;background:var(--brand)}
.utility-strip{border-block:1px solid var(--line);background:rgba(255,255,255,.66)}.utility-grid{min-height:116px;display:grid;grid-template-columns:repeat(4,1fr)}.utility-item{padding:24px 30px;display:grid;grid-template-columns:44px 1fr;align-content:center;gap:5px 13px;border-right:1px solid var(--line)}.utility-item:last-child{border-right:0}.utility-icon{width:44px;height:44px;grid-row:1/3;display:grid;place-items:center;color:var(--brand);border-radius:12px;background:var(--brand-soft);font-weight:850}.utility-item strong{align-self:end;font-size:17px}.utility-item span{color:var(--muted);font-size:12px}
.section{padding:92px 0}.section-compact{padding:70px 0}.section-muted{background:#eaf3f1;border-block:1px solid var(--line)}.section-dark{color:#fff;background:linear-gradient(135deg,#082f3c,#07595a)}.section-heading{max-width:720px;margin-bottom:36px}.section-heading.is-centered{margin-inline:auto;text-align:center}.section-heading.is-centered .eyebrow{justify-content:center}.section-heading h2{margin:12px 0;font-size:clamp(30px,3.7vw,48px);line-height:1.18;letter-spacing:-.035em}.section-heading p{margin:0;color:var(--muted);font-size:16px;line-height:1.8}.section-dark .section-heading p{color:rgba(255,255,255,.68)}
.profession-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.profession-card{min-height:330px;padding:23px;display:flex;flex-direction:column;border:1px solid var(--line);border-radius:var(--radius);background:rgba(255,255,255,.82);box-shadow:var(--shadow-sm)}.profession-card-top{display:flex;align-items:center;justify-content:space-between;gap:10px}.profession-symbol{width:46px;height:46px;display:grid;place-items:center;color:#fff;border-radius:13px;font-size:18px;font-weight:850}.profession-card.is-water .profession-symbol{background:var(--water)}.profession-card.is-building .profession-symbol{background:var(--building)}.profession-card.is-municipal .profession-symbol{background:var(--municipal)}.profession-card.is-power .profession-symbol{background:var(--power)}.profession-card .tag{color:#75898e;font-size:11px;font-weight:750}.profession-card h3{margin:22px 0 8px;color:var(--ink);font-size:23px}.profession-card>p{margin:0 0 17px;min-height:46px;color:var(--muted);font-size:13px;line-height:1.7}
.clean-list{margin:auto 0 0;padding:0;display:grid;gap:9px;list-style:none}.clean-list li{position:relative;padding-left:16px;color:#425d63;font-size:13px;line-height:1.55}.clean-list li::before{position:absolute;left:0;top:.65em;width:6px;height:6px;content:"";border-radius:50%;background:currentColor;opacity:.55}
.workflow-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;counter-reset:workflow}.workflow-card{position:relative;padding:24px;border:1px solid var(--line);border-radius:var(--radius);background:#fff;box-shadow:var(--shadow-sm);counter-increment:workflow}.workflow-card::before{width:36px;height:36px;margin-bottom:36px;display:grid;place-items:center;content:"0" counter(workflow);color:var(--brand);border-radius:11px;background:var(--brand-soft);font-size:12px;font-weight:850}.workflow-card:not(:last-child)::after{position:absolute;top:40px;right:-18px;z-index:2;content:"→";color:#8aa09f;font-size:20px}.workflow-card h3{margin:0 0 8px;font-size:19px}.workflow-card p{margin:0;color:var(--muted);font-size:13px;line-height:1.7}
.bento{display:grid;grid-template-columns:1.15fr .85fr .85fr;gap:14px}.bento-card{min-height:240px;padding:26px;overflow:hidden;border:1px solid var(--line);border-radius:var(--radius);background:#fff;box-shadow:var(--shadow-sm)}.bento-card.is-wide{grid-column:span 2}.bento-card.is-tall{grid-row:span 2}.bento-kicker{color:var(--brand);font-size:12px;font-weight:800}.bento-card h3{margin:11px 0 8px;font-size:23px}.bento-card p{margin:0;color:var(--muted);font-size:14px;line-height:1.75}.number-showcase{margin-top:26px;display:flex;flex-wrap:wrap;gap:8px}.number-showcase span{padding:8px 10px;color:#36545b;border:1px solid var(--line);border-radius:8px;background:#f7faf9;font:700 12px ui-monospace,monospace}.check-stack{margin-top:22px;display:grid;gap:9px}.check-stack span{padding:10px 12px;color:#36535a;border-radius:9px;background:var(--surface-soft);font-size:13px}.check-stack span::before{margin-right:8px;content:"✓";color:var(--brand);font-weight:900}
.device-section{display:grid;grid-template-columns:.85fr 1.15fr;align-items:center;gap:54px}.device-copy h2{margin:14px 0;font-size:clamp(30px,4vw,48px);line-height:1.16;letter-spacing:-.035em}.device-copy p{color:var(--muted);line-height:1.8}.device-points{margin:24px 0 0;padding:0;display:grid;gap:11px;list-style:none}.device-points li{padding-left:30px;position:relative;color:#405b61}.device-points li::before{position:absolute;left:0;top:-1px;width:22px;height:22px;display:grid;place-items:center;content:"✓";color:var(--brand);border-radius:7px;background:var(--brand-soft);font-size:12px;font-weight:900}.device-gallery{position:relative;min-height:500px}.device-gallery .desktop-frame{width:96%;top:20px}.device-gallery .phone-frame{right:12px;width:190px}
.cta-band{padding:72px 0}.cta-card{padding:48px;display:flex;align-items:center;justify-content:space-between;gap:28px;border-radius:24px;background:linear-gradient(125deg,#e2f4ef,#f7fbfa);border:1px solid #c7e1db;box-shadow:var(--shadow-sm)}.cta-card h2{margin:0 0 10px;font-size:clamp(28px,4vw,44px);letter-spacing:-.035em}.cta-card p{margin:0;color:var(--muted)}
.page-hero{padding:70px 0 54px;border-bottom:1px solid var(--line)}.page-hero h1{margin-bottom:14px;font-size:clamp(38px,5vw,62px)}.page-hero p{max-width:760px;margin:0;color:var(--muted);font-size:17px;line-height:1.8}.page-hero-actions{margin-top:22px;display:flex;gap:10px;flex-wrap:wrap}
.feature-rows{display:grid;gap:18px}.feature-row{padding:28px;display:grid;grid-template-columns:220px 1fr;gap:34px;border:1px solid var(--line);border-radius:var(--radius);background:#fff;box-shadow:var(--shadow-sm)}.feature-row h3{margin:8px 0 0;font-size:24px}.feature-row p{margin:0 0 12px;color:var(--muted);line-height:1.8}.feature-row .clean-list{grid-template-columns:repeat(2,1fr)}
.steps{display:grid;gap:18px}.step{padding:28px;display:grid;grid-template-columns:70px 1fr;gap:24px;border:1px solid var(--line);border-radius:var(--radius);background:#fff;box-shadow:var(--shadow-sm)}.step-number{width:58px;height:58px;display:grid;place-items:center;color:var(--brand);border-radius:17px;background:var(--brand-soft);font-size:18px;font-weight:850}.step h2{margin:2px 0 8px;font-size:24px}.step p{margin:0;color:var(--muted);line-height:1.8}.tip{margin-top:12px;padding:11px 13px;color:#3f5d62;border-left:3px solid var(--brand);border-radius:0 9px 9px 0;background:var(--surface-soft);font-size:13px}
.download-grid{display:grid;grid-template-columns:.85fr 1.15fr;gap:22px;align-items:start}.download-card{padding:32px;border:1px solid #bfded7;border-radius:21px;background:linear-gradient(145deg,#fff,#eaf7f3);box-shadow:var(--shadow-lg)}.download-card h2{margin:14px 0 6px;font-size:31px}.file-line{margin:0 0 22px;color:var(--muted)}.spec-list{margin:24px 0 0;padding:0;display:grid;gap:10px;list-style:none}.spec-list li{padding-left:24px;position:relative;color:#405b61;line-height:1.55}.spec-list li::before{position:absolute;left:0;content:"✓";color:var(--brand);font-weight:900}
.preview-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}.preview-card{padding:0;overflow:hidden;text-align:left;border:1px solid var(--line);border-radius:14px;background:#fff;box-shadow:var(--shadow-sm);cursor:zoom-in}.preview-card img{width:100%;aspect-ratio:16/10;object-fit:cover;object-position:top}.preview-card span{min-height:42px;padding:0 12px;display:flex;align-items:center;color:#38545a;font-size:13px;font-weight:750}
.contact-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.contact-card{padding:28px;border:1px solid var(--line);border-radius:var(--radius);background:#fff;box-shadow:var(--shadow-sm)}.contact-icon{width:44px;height:44px;display:grid;place-items:center;color:var(--brand);border-radius:13px;background:var(--brand-soft);font-weight:850}.contact-card h2{margin:20px 0 8px;font-size:20px}.contact-card a,.contact-value{display:block;color:var(--brand-deep);font-size:20px;font-weight:800}.contact-card p{color:var(--muted);line-height:1.7}
.lightbox{position:fixed;inset:0;z-index:120;padding:24px;display:none;place-items:center}.lightbox.is-open{display:grid}.lightbox-backdrop{position:absolute;inset:0;border:0;background:rgba(5,27,33,.82);backdrop-filter:blur(9px)}.lightbox-stage{position:relative;z-index:1;width:min(1180px,96vw);max-height:90vh;margin:0;padding:12px;border-radius:18px;background:#fff;box-shadow:var(--shadow-lg)}.lightbox-stage img{width:100%;max-height:calc(90vh - 68px);object-fit:contain;border-radius:11px}.lightbox-stage figcaption{padding:11px 4px 1px;color:#526b70;font-size:13px}.lightbox-close{position:fixed;top:22px;right:22px;z-index:2;width:44px;height:44px;color:#fff;border:1px solid rgba(255,255,255,.28);border-radius:50%;background:rgba(255,255,255,.12);font-size:22px}
.site-footer{padding:46px 0 30px;color:#c5d5d7;background:#092f38}.footer-grid{display:grid;grid-template-columns:1fr auto;gap:30px;align-items:start}.footer-brand{display:flex;align-items:center;gap:11px;color:#fff;font-weight:800}.footer-copy{margin:12px 0 0;max-width:560px;color:#9cb1b5;font-size:13px;line-height:1.7}.footer-links{display:flex;flex-wrap:wrap;gap:16px;font-size:13px}.copyright{margin-top:32px;padding-top:20px;color:#799399;border-top:1px solid rgba(255,255,255,.1);font-size:12px}
[data-reveal]{opacity:0;transform:translateY(18px);transition:opacity 500ms var(--ease-out),transform 500ms var(--ease-out)}[data-reveal].is-visible{opacity:1;transform:translateY(0)}.btn,.nav-links a,.preview-card,.profession-card{transition:transform 160ms var(--ease-out),color 160ms var(--ease-out),background-color 160ms var(--ease-out),border-color 160ms var(--ease-out),box-shadow 180ms var(--ease-out)}.btn:active,.nav-toggle:active,.preview-card:active{transform:scale(.97)}
@media(hover:hover) and (pointer:fine){.btn:hover{transform:translateY(-2px);box-shadow:0 13px 26px rgba(9,46,54,.12)}.profession-card:hover{transform:translateY(-4px);border-color:#b9d3d0;box-shadow:0 18px 42px rgba(11,48,55,.12)}.preview-card:hover{transform:translateY(-3px);box-shadow:0 16px 34px rgba(11,48,55,.13)}}
@media(max-width:1020px){.hero-grid{grid-template-columns:1fr}.hero-copy-block{max-width:760px}.product-visual{min-height:500px}.desktop-frame{width:88%}.profession-grid{grid-template-columns:repeat(2,1fr)}.workflow-grid{grid-template-columns:repeat(2,1fr)}.workflow-card::after{display:none}.bento{grid-template-columns:1fr 1fr}.bento-card.is-tall{grid-row:auto}.device-section{grid-template-columns:1fr}.device-copy{max-width:720px}.download-grid{grid-template-columns:1fr}.contact-grid{grid-template-columns:1fr 1fr}}
@media(max-width:760px){.container{width:min(100% - 28px,var(--container))}.nav-inner{min-height:62px}.brand{font-size:15px}.nav-toggle{display:grid}.nav-links{position:absolute;top:calc(100% + 1px);left:0;right:0;padding:10px 14px 16px;display:none;flex-direction:column;align-items:stretch;border-bottom:1px solid var(--line);background:rgba(251,253,252,.98);box-shadow:var(--shadow-sm)}.site-nav.menu-open .nav-links{display:flex}.nav-links a{width:100%;justify-content:center}.nav-cta{margin-left:0}.hero{padding:48px 0 42px}.hero-grid{gap:34px}.hero h1,.page-hero h1{font-size:clamp(38px,12vw,54px)}.hero-copy{font-size:16px}.product-visual{min-height:355px}.desktop-frame{width:94%;top:10px;transform:none}.phone-frame{width:126px;border-radius:22px}.phone-frame img{border-radius:17px}.floating-proof{left:4px;bottom:0}.utility-grid{grid-template-columns:repeat(2,1fr)}.utility-item{padding:18px;border-bottom:1px solid var(--line)}.utility-item:nth-child(2){border-right:0}.utility-item:nth-child(n+3){border-bottom:0}.section{padding:64px 0}.profession-grid,.workflow-grid,.bento,.contact-grid{grid-template-columns:1fr}.bento-card.is-wide{grid-column:auto}.profession-card{min-height:0}.clean-list{margin-top:12px}.cta-card{padding:30px 24px;align-items:flex-start;flex-direction:column}.feature-row{grid-template-columns:1fr;gap:16px}.feature-row .clean-list{grid-template-columns:1fr}.step{grid-template-columns:48px 1fr;padding:22px;gap:16px}.step-number{width:46px;height:46px;border-radius:13px}.preview-grid{grid-template-columns:1fr}.download-card{padding:24px}.footer-grid{grid-template-columns:1fr}.footer-links{gap:12px}.device-gallery{min-height:360px}.device-gallery .phone-frame{width:132px}}
@media(max-width:430px){.hero-actions .btn,.page-hero-actions .btn{width:100%}.utility-grid{grid-template-columns:1fr}.utility-item{border-right:0;border-bottom:1px solid var(--line)!important}.utility-item:last-child{border-bottom:0!important}.profession-pills{display:grid;grid-template-columns:1fr 1fr}.profession-pill{justify-content:center}.product-visual{min-height:310px}.phone-frame{width:108px}.floating-proof{display:none}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}[data-reveal]{opacity:1;transform:none;transition:none}.btn,.nav-links a,.preview-card,.profession-card{transition-duration:1ms}}