/* roulang page: index */
:root{
--ink:#18201d;--coal:#202522;--charcoal:#2b302d;--asphalt:#414743;--paper:#f6f5f0;--white:#fff;
--lime:#d7ef2c;--lime-dark:#b9d10a;--cyan:#b8dbd4;--orange:#ef8d36;--red:#c94d43;--green:#357857;
--text:#1b2320;--muted:#65706a;--line:#dbe0d9;--soft:#ecefe9;--radius:10px;--shadow:0 16px 35px rgba(22,30,26,.08);
--container:1240px;--navh:116px
}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:126px}body{margin:0;background:var(--paper);color:var(--text);font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",Arial,sans-serif;font-size:16px;line-height:1.7;overflow-x:hidden}a{color:inherit;text-decoration:none}button,input,select,textarea{font:inherit}button{cursor:pointer;border:0}img{max-width:100%;display:block}::selection{background:var(--lime);color:var(--ink)}
.container{width:min(var(--container),calc(100% - 48px));margin:auto}.section{padding:94px 0;position:relative}.section-dark{background:var(--coal);color:#fff}.eyebrow{display:inline-flex;align-items:center;gap:8px;color:#59662c;font-size:13px;font-weight:800;letter-spacing:.08em}.section-dark .eyebrow{color:var(--lime)}.eyebrow:before{content:"";width:22px;height:2px;background:currentColor}.section-head{max-width:760px;margin-bottom:44px}.section-head h2{font-size:clamp(27px,3.4vw,46px);line-height:1.22;letter-spacing:.01em;margin:12px 0 14px}.section-head p{margin:0;color:var(--muted);max-width:720px}.section-dark .section-head p{color:#c4ccc6}.btn{min-height:48px;padding:11px 20px;display:inline-flex;align-items:center;justify-content:center;gap:9px;font-weight:800;border-radius:6px;transition:.2s ease;border:1px solid transparent}.btn-primary{background:var(--lime);color:var(--ink)}.btn-primary:hover{background:#edff59;transform:translateY(-2px)}.btn-secondary{border-color:rgba(255,255,255,.7);color:#fff;background:transparent}.btn-secondary:hover{background:#fff;color:var(--ink)}.btn:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid var(--orange);outline-offset:3px}.btn:active{transform:translateY(0)}.btn:disabled{opacity:.5;cursor:not-allowed}
.site-header{height:var(--navh);background:#fbfbf8;position:sticky;top:0;z-index:50;border-bottom:1px solid var(--line);box-shadow:0 3px 12px rgba(15,22,18,.03)}.head-top{height:63px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line)}.brand{font-size:20px;font-weight:900;letter-spacing:.02em;display:flex;align-items:center;gap:10px}.brand-mark{width:28px;height:28px;background:var(--lime);border:3px solid var(--ink);display:grid;place-items:center;font-size:14px;line-height:1;color:var(--ink)}.top-contact{font-size:14px;color:var(--muted);display:flex;align-items:center;gap:18px}.top-contact b{color:var(--text)}.nav-row{height:53px;display:flex;align-items:center;justify-content:space-between}.desktop-nav{display:flex;align-items:center;height:100%;gap:3px}.desktop-nav a{height:100%;padding:0 15px;display:flex;align-items:center;font-size:14px;font-weight:700;color:#46504a;border-bottom:3px solid transparent;transition:.2s}.desktop-nav a:hover,.desktop-nav a.active{color:var(--text);border-bottom-color:var(--lime-dark)}.nav-cta{font-size:13px;font-weight:800;color:var(--text);padding:7px 12px;border-left:1px solid var(--line)}.mobile-toggle{display:none;background:transparent;width:48px;height:48px;font-size:24px;color:var(--ink)}.mobile-panel{display:none}
.hero{height:calc(100vh - 82px);min-height:650px;max-height:820px;background:var(--coal);position:relative;color:#fff;overflow:hidden}.hero-slide{position:absolute;inset:0;background-size:cover;background-position:center;opacity:0;transition:opacity .7s ease}.hero-slide.active{opacity:1}.hero-slide:after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(12,16,14,.88) 0%,rgba(12,16,14,.55) 47%,rgba(12,16,14,.18) 100%)}.hero-content{position:relative;z-index:2;padding-top:clamp(100px,14vh,150px);max-width:880px}.hero-kicker{display:inline-flex;align-items:center;gap:10px;font-size:14px;color:var(--lime);font-weight:800;letter-spacing:.08em}.hero-kicker:before{content:"";width:34px;height:2px;background:var(--lime)}h1{font-size:clamp(40px,6.2vw,75px);line-height:1.12;max-width:820px;margin:18px 0 20px;letter-spacing:.01em}.hero p{font-size:17px;line-height:1.85;max-width:800px;color:#eef1ed;margin:0}.hero-actions{display:flex;gap:13px;flex-wrap:wrap;margin-top:30px}.hero-code{margin-top:34px;width:min(610px,100%);background:rgba(20,26,23,.82);border-left:4px solid var(--lime);padding:16px 18px;font-family:Consolas,"Courier New",monospace;font-size:13px;color:#dce5dc;line-height:1.8}.code-key{color:var(--lime)}.code-val{color:#b8dbd4}.hero-controls{position:absolute;right:clamp(24px,5vw,70px);bottom:38px;z-index:3;display:flex;align-items:center;gap:10px}.hero-controls button{height:42px;min-width:42px;background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.5);color:#fff;border-radius:3px;font-size:16px}.hero-controls button:hover{background:var(--lime);color:var(--ink)}.slide-indicator{font-size:13px;letter-spacing:.12em}.hero-peek{position:absolute;bottom:0;left:0;right:0;height:60px;background:var(--paper);clip-path:polygon(0 74%,100% 0,100% 100%,0 100%);z-index:4}
.overview{padding-top:76px}.overview-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:74px;align-items:center}.image-frame{position:relative}.image-frame img{width:100%;aspect-ratio:1.15/1;object-fit:cover;border-radius:var(--radius);filter:saturate(.88)}.image-frame:after{content:"停车场设备联动";position:absolute;bottom:17px;left:17px;background:var(--lime);color:var(--ink);padding:7px 12px;font-size:13px;font-weight:900}.overview h2{font-size:clamp(28px,3.5vw,45px);line-height:1.25;margin:12px 0}.overview p{color:var(--muted)}.trust-list{padding:0;margin:25px 0;list-style:none;border-top:1px solid var(--line)}.trust-list li{padding:12px 0;border-bottom:1px solid var(--line);font-size:14px;display:grid;grid-template-columns:138px 1fr;gap:10px}.trust-list b{color:var(--text)}
.metrics{background:#e9ede7;padding:42px 0 50px}.metrics-lead{display:flex;justify-content:space-between;align-items:end;gap:25px;margin-bottom:23px}.metrics-lead h2{font-size:30px;line-height:1.3;margin:0}.metrics-lead p{margin:0;color:var(--muted);max-width:540px;font-size:14px}.metrics-flow{display:grid;grid-template-columns:1.2fr 1fr 1fr 1.1fr 1fr;gap:0;background:#fff;border:1px solid var(--line);overflow:hidden}.metric{padding:23px 21px;border-right:1px solid var(--line);min-width:0}.metric:last-child{border-right:0}.metric-label{font-size:13px;color:var(--muted);display:block}.metric-num{font-size:34px;font-weight:900;line-height:1.2;margin:9px 0 7px}.metric-num em{font-size:16px;font-style:normal}.metric-note{font-size:12px;color:#758078;line-height:1.5}.mini-bars{display:flex;align-items:end;gap:4px;height:30px;margin-top:11px}.mini-bars i{display:block;background:var(--lime-dark);width:9px}.services-grid{display:grid;grid-template-columns:1.15fr .85fr .85fr;gap:16px;align-items:stretch}.service{border-top:3px solid var(--ink);padding:22px 4px 12px;position:relative;transition:.2s}.service:hover{transform:translateY(-4px);border-color:var(--lime-dark)}.service:nth-child(1){grid-row:span 2;background:var(--coal);color:#fff;padding:30px 27px;border-top-color:var(--lime)}.service:nth-child(4){background:#e4ebe4;padding:24px}.service-icon{width:36px;height:36px;border:1px solid currentColor;display:grid;place-items:center;margin-bottom:20px;font-size:18px}.service h3{font-size:19px;line-height:1.35;margin:0 0 10px}.service p{font-size:14px;line-height:1.65;margin:0;color:var(--muted)}.service:nth-child(1) p{color:#c9d1ca}.tag{display:inline-block;background:var(--lime);color:var(--ink);padding:3px 8px;font-size:12px;font-weight:800;margin-top:16px}
.products-layout{display:grid;grid-template-columns:1.28fr .72fr;gap:18px}.product-main{min-height:480px;position:relative;overflow:hidden;border-radius:var(--radius);color:#fff;background:var(--coal)}.product-main img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.72}.product-main:after{content:"";position:absolute;inset:0;background:linear-gradient(0deg,rgba(13,18,15,.94),rgba(13,18,15,.05) 70%)}.product-main-content{position:absolute;z-index:2;left:30px;right:30px;bottom:28px}.product-main h3{font-size:30px;margin:0 0 9px;line-height:1.25}.product-main p{max-width:540px;margin:0;color:#e1e7e1}.product-side{display:grid;grid-template-rows:1fr 1fr;gap:18px}.product-small{border:1px solid var(--line);padding:24px;background:#fff;position:relative;overflow:hidden}.product-small img{position:absolute;right:0;bottom:0;width:47%;height:100%;object-fit:cover;opacity:.32}.product-small h3,.product-small p,.product-small span{position:relative;z-index:1}.product-small h3{font-size:21px;margin:0 0 9px;max-width:60%}.product-small p{font-size:14px;color:var(--muted);line-height:1.65;max-width:58%;margin:0}.product-small span{font-size:13px;font-weight:800;display:block;margin-top:13px}
.compare{padding:0}.compare-wrap{padding:88px 0;background:var(--coal);color:#fff}.compare-grid{display:grid;grid-template-columns:.8fr 1.2fr;gap:55px;align-items:start}.compare-grid h2{font-size:clamp(28px,3.8vw,45px);line-height:1.22;margin:12px 0}.compare-grid p{color:#c6cec7}.compare-table{border-top:1px solid #59615c}.compare-row{display:grid;grid-template-columns:1fr 1fr 1fr;border-bottom:1px solid #59615c}.compare-row>*{padding:14px 12px;font-size:14px}.compare-row strong{color:var(--lime)}.compare-row:first-child{font-size:13px;color:#b8c1ba}.milestones{background:#fff}.timeline{position:relative;display:grid;grid-template-columns:repeat(6,1fr);gap:0;margin-top:48px}.timeline:before{content:"";position:absolute;left:5%;right:5%;top:17px;height:2px;background:var(--line)}.milestone{position:relative;padding:0 14px 0 0}.milestone b{position:relative;z-index:1;display:grid;place-items:center;width:36px;height:36px;background:var(--ink);color:var(--lime);font-size:13px;margin-bottom:18px}.milestone h3{font-size:17px;margin:0 0 7px;line-height:1.35}.milestone p{font-size:13px;color:var(--muted);line-height:1.6;margin:0}.stories-grid{display:grid;grid-template-columns:1.25fr .75fr;gap:20px}.story-quote{background:#d9e4d7;padding:43px;position:relative}.story-quote:before{content:"“";font-size:92px;line-height:.5;color:#6e866d}.story-quote blockquote{font-size:25px;font-weight:800;line-height:1.55;margin:14px 0 25px}.story-quote cite{font-size:14px;font-style:normal;color:#55625b}.story-evidence{background:var(--coal);color:#fff;padding:35px}.story-evidence h3{font-size:22px;line-height:1.4;margin:0 0 17px}.evidence-item{padding:15px 0;border-bottom:1px solid #4c534e}.evidence-item:last-child{border:0}.evidence-item b{display:block;color:var(--lime);font-size:14px}.evidence-item span{font-size:14px;color:#c8d0c9;display:block;margin-top:3px}
.news-list{border-top:2px solid var(--ink)}.news-item{display:grid;grid-template-columns:110px 1fr auto;gap:25px;align-items:center;padding:23px 4px;border-bottom:1px solid var(--line);transition:.2s}.news-item:hover{padding-left:12px;background:#fff}.news-date{font-size:13px;font-weight:900;color:#69746d}.news-date span{display:block;font-size:25px;color:var(--ink);line-height:1.1}.news-title{font-size:20px;font-weight:800;line-height:1.35;margin:0 0 6px}.news-text{font-size:14px;margin:0;color:var(--muted)}.news-arrow{font-size:23px;color:#617200}
.assurance{background:#e9ede7}.assurance-layout{display:grid;grid-template-columns:.8fr 1.2fr;gap:70px}.assurance-copy h2{font-size:clamp(29px,3.6vw,44px);line-height:1.25;margin:12px 0}.assurance-copy p{color:var(--muted)}.assurance-map{background:var(--coal);padding:28px;color:#fff;display:grid;grid-template-columns:1fr 1fr;gap:1px;background-color:#56605a}.assure-node{background:var(--coal);padding:22px;min-height:135px}.assure-node b{color:var(--lime);display:block;font-size:16px;margin-bottom:8px}.assure-node span{font-size:13px;color:#cad2cb;line-height:1.6}.scenes{background:#fff}.scene-tabs{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:22px}.scene-tab{background:#eef1ec;padding:10px 14px;color:var(--text);font-size:14px;font-weight:800;border-bottom:3px solid transparent}.scene-tab.active,.scene-tab:hover{background:var(--ink);color:#fff;border-bottom-color:var(--lime)}.scene-panel{display:grid;grid-template-columns:1fr 1fr;min-height:360px;background:var(--coal);color:#fff}.scene-panel img{width:100%;height:100%;object-fit:cover}.scene-content{padding:38px}.scene-content h3{font-size:29px;margin:0 0 14px}.scene-content p{color:#d1dad2;margin:0 0 22px}.scene-points{list-style:none;padding:0;margin:0}.scene-points li{padding:9px 0;border-top:1px solid #4b554d;font-size:14px}.quick-grid{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid var(--line);border-left:1px solid var(--line)}.quick-item{padding:23px;border-right:1px solid var(--line);border-bottom:1px solid var(--line);background:#fff}.quick-item h3{font-size:17px;line-height:1.4;margin:0 0 9px}.quick-item p{font-size:14px;line-height:1.65;color:var(--muted);margin:0}.faq-wrap{max-width:900px}.faq-item{border-top:1px solid #526058}.faq-item:last-child{border-bottom:1px solid #526058}.faq-question{width:100%;padding:20px 0;text-align:left;color:#fff;background:transparent;display:flex;justify-content:space-between;align-items:center;gap:18px;font-weight:800;font-size:17px}.faq-question .plus{color:var(--lime);font-size:25px;font-weight:400;transition:.2s}.faq-question[aria-expanded="true"] .plus{transform:rotate(45deg)}.faq-answer{display:none;color:#cbd3cc;font-size:15px;padding:0 42px 21px 0}.faq-answer.open{display:block}
.contact{background:var(--lime);padding:85px 0}.contact-grid{display:grid;grid-template-columns:.82fr 1.18fr;gap:70px}.contact h2{font-size:clamp(30px,4vw,48px);line-height:1.2;margin:12px 0 15px}.contact p{max-width:430px}.contact-info{border-top:1px solid rgba(24,32,29,.35);margin-top:27px}.contact-info div{padding:12px 0;border-bottom:1px solid rgba(24,32,29,.35);font-size:14px}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:13px}.field.full{grid-column:1/-1}.field label{font-size:13px;font-weight:800;display:block;margin-bottom:5px}.required{color:var(--red)}input,select,textarea{width:100%;min-height:47px;padding:10px 12px;border:1px solid rgba(24,32,29,.48);border-radius:4px;color:var(--text);background:#fbfcef}textarea{min-height:104px;resize:vertical}input:focus,select:focus,textarea:focus{border-color:var(--ink);outline:none;box-shadow:0 0 0 3px rgba(255,255,255,.5)}.privacy{font-size:12px;line-height:1.6;margin:12px 0;color:#455147}.form-status{display:none;padding:10px 13px;margin-top:12px;font-size:14px;font-weight:700;background:#eaf6cf;border-left:4px solid var(--green)}.form-status.error{background:#ffe7df;border-left-color:var(--red)}.site-footer{background:#151a17;color:#c7cec8;padding:50px 0 22px}.footer-grid{display:grid;grid-template-columns:1.15fr .85fr .85fr;gap:40px;padding-bottom:34px;border-bottom:1px solid #3a423c}.footer-brand{color:#fff;font-size:21px;font-weight:900}.footer-brand+p{font-size:14px;line-height:1.7}.footer-title{color:var(--lime);font-size:13px;font-weight:800;margin-bottom:12px}.footer-links{display:grid;gap:6px;font-size:14px}.footer-links a:hover{color:var(--lime)}.footer-bottom{padding-top:18px;font-size:12px;color:#89948c;display:flex;justify-content:space-between;gap:15px;flex-wrap:wrap}
@media(max-width:1024px){:root{--navh:105px}.desktop-nav a{padding:0 9px;font-size:13px}.overview-grid,.assurance-layout,.contact-grid{gap:38px}.services-grid{grid-template-columns:1fr 1fr}.service:nth-child(1){grid-row:auto}.timeline{grid-template-columns:repeat(3,1fr);gap:25px}.timeline:before{display:none}.milestone{padding:0}.products-layout{grid-template-columns:1fr}.product-side{grid-template-columns:1fr 1fr;grid-template-rows:1fr}.product-small{min-height:220px}}
@media(max-width:768px){:root{--navh:64px}.site-header{height:64px}.head-top{height:64px;border:0}.head-top .top-contact,.nav-row{display:none}.brand{font-size:17px}.mobile-toggle{display:grid;place-items:center}.mobile-panel{position:fixed;z-index:49;top:64px;left:0;right:0;background:#fbfbf8;border-bottom:1px solid var(--line);padding:13px 24px 22px;box-shadow:0 12px 22px rgba(0,0,0,.09)}.mobile-panel.open{display:grid}.mobile-panel a{padding:12px 0;border-bottom:1px solid var(--line);font-weight:800}.hero{height:calc(100vh - 64px);min-height:625px}.hero-content{padding-top:85px}.hero p{font-size:15px}.hero-code{font-size:11px;padding:13px}.hero-controls{right:24px;bottom:65px}.section{padding:68px 0}.container{width:min(var(--container),calc(100% - 32px))}.overview-grid,.compare-grid,.stories-grid,.assurance-layout,.scene-panel,.contact-grid{grid-template-columns:1fr}.overview-grid{gap:30px}.image-frame{order:2}.metrics{padding:35px 0}.metrics-lead{display:block}.metrics-lead p{margin-top:8px}.metrics-flow{overflow-x:auto;display:flex}.metric{min-width:175px}.services-grid{grid-template-columns:1fr 1fr}.products-layout{gap:14px}.product-main{min-height:380px}.product-side{grid-template-columns:1fr}.product-small{min-height:185px}.compare-grid{gap:24px}.timeline{grid-template-columns:1fr 1fr}.story-quote{padding:29px}.story-quote blockquote{font-size:21px}.news-item{grid-template-columns:75px 1fr;gap:14px}.news-arrow{display:none}.news-title{font-size:17px}.news-text{font-size:13px}.assurance-map{grid-template-columns:1fr 1fr}.quick-grid{grid-template-columns:1fr 1fr}.footer-grid{grid-template-columns:1fr 1fr}.footer-grid>div:first-child{grid-column:1/-1}}
@media(max-width:520px){.section{padding:56px 0}.section-head{margin-bottom:30px}.section-head h2{font-size:29px}.hero h1{font-size:39px}.hero-content{padding-top:72px}.hero-actions{display:grid;grid-template-columns:1fr}.btn{width:100%}.hero-code{margin-top:22px}.hero-controls{bottom:57px}.overview h2{font-size:30px}.trust-list li{grid-template-columns:1fr;gap:2px}.services-grid{grid-template-columns:1fr}.service:nth-child(1){padding:26px 22px}.product-main-content{left:20px;right:20px;bottom:20px}.product-main h3{font-size:25px}.product-small h3,.product-small p{max-width:62%}.compare-row{grid-template-columns:84px 1fr 1fr}.compare-row>*{padding:11px 6px;font-size:12px}.timeline{grid-template-columns:1fr}.milestone{padding-left:47px;min-height:100px}.milestone b{position:absolute;left:0;top:0}.timeline:after{content:"";position:absolute;top:20px;bottom:20px;left:17px;width:2px;background:var(--line)}.milestone b{z-index:2}.assurance-map{grid-template-columns:1fr}.scene-content{padding:27px}.scene-panel img{height:225px}.quick-grid{grid-template-columns:1fr}.faq-question{font-size:16px}.faq-answer{padding-right:0}.form-grid{grid-template-columns:1fr}.field.full{grid-column:auto}.footer-grid{grid-template-columns:1fr}.footer-grid>div:first-child{grid-column:auto}.footer-bottom{display:block}.footer-bottom span{display:block;margin-bottom:6px}}