/* roulang page: index */
:root{
  --ink:#202522;--ink-2:#303732;--lime:#d7f34a;--lime-2:#b9d62d;
  --orange:#d98245;--paper:#f5f4ef;--mist:#ebece6;--white:#fffdf8;
  --muted:#70766e;--line:#d9dcd3;--darkline:#414840;--radius:18px;
  --shadow:0 14px 34px rgba(25,31,27,.08);--container:1240px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;color:var(--ink);background:var(--paper);line-height:1.75;font-size:16px}
a{color:inherit;text-decoration:none}
img{display:block;width:100%;object-fit:cover}
button,input,textarea,select{font:inherit}
button{cursor:pointer;border:0}
.container{width:min(var(--container),calc(100% - 48px));margin:auto}
.section{padding:104px 0;position:relative;overflow:hidden}
.section-head{max-width:720px;margin-bottom:46px}
.eyebrow{display:inline-flex;align-items:center;gap:9px;color:#68711e;font-size:13px;font-weight:700;letter-spacing:.12em;margin-bottom:14px}
.eyebrow:before{content:"";width:25px;height:3px;background:var(--lime);display:inline-block}
h1,h2,h3{line-height:1.22;letter-spacing:-.035em}
h1{font-size:clamp(38px,5vw,64px)}
h2{font-size:clamp(30px,3.2vw,42px)}
h3{font-size:21px}
.section-head p{color:var(--muted);margin-top:18px;max-width:660px}
.topline{height:34px;background:var(--ink);color:#c9cec4;font-size:12px}
.topline .container{height:100%;display:flex;align-items:center;justify-content:space-between}
.topline strong{color:var(--lime);font-weight:600}
.toplinks{display:flex;gap:22px}
.site-header{position:sticky;top:0;z-index:20;background:rgba(245,244,239,.92);backdrop-filter:blur(12px);border-bottom:1px solid transparent;transition:.25s}
.site-header.scrolled{border-color:var(--line);box-shadow:0 4px 18px rgba(32,37,34,.06)}
.navbar{height:78px;display:flex;align-items:center;gap:28px}
.logo{font-size:20px;font-weight:800;white-space:nowrap;letter-spacing:-.06em}
.logo em{font-style:normal;color:#7b8d20}
.navlinks{display:flex;align-items:center;justify-content:center;gap:22px;flex:1}
.navlinks a{font-size:14px;color:#555d55;padding:28px 0;position:relative;white-space:nowrap}
.navlinks a:after{content:"";position:absolute;bottom:17px;left:0;width:0;height:3px;background:var(--lime);transition:.2s}
.navlinks a:hover,.navlinks a.active{color:var(--ink);font-weight:700}
.navlinks a:hover:after,.navlinks a.active:after{width:100%}
.btn{min-height:46px;padding:11px 20px;border-radius:8px;display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:700;font-size:14px;transition:.22s;border:1px solid transparent}
.btn-primary{background:var(--ink);color:var(--lime)}
.btn-primary:hover{background:var(--lime);color:var(--ink);transform:translateY(-2px)}
.btn-light{border-color:#bfc5b9;color:var(--ink);background:transparent}
.btn-light:hover{border-color:var(--ink);background:var(--white)}
.menu-btn{display:none;background:none;width:46px;height:46px;border:1px solid var(--line);border-radius:8px}
.menu-btn svg{width:22px}
.hero{min-height:650px;background:var(--ink);color:var(--white);position:relative;display:flex;align-items:center}
.hero:before{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(24,29,26,.98) 0%,rgba(24,29,26,.82) 43%,rgba(24,29,26,.18) 100%),url('/assets/images/2785d69f9824ba59.webp') center/cover}
.hero .container{position:relative;z-index:1}
.hero-copy{max-width:650px;padding:80px 0}
.hero .eyebrow{color:var(--lime)}
.hero h1{max-width:600px}
.hero h1 span{color:var(--lime)}
.hero-copy>p{color:#d1d5ca;max-width:610px;margin:26px 0 30px;line-height:1.9}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap}
.hero .btn-light{color:var(--white);border-color:#697269}
.hero .btn-light:hover{color:var(--ink)}
.hero-stamp{position:absolute;right:0;top:104px;background:var(--lime);color:var(--ink);padding:13px 18px;transform:rotate(3deg);font-weight:800;font-size:13px}
.hero-panel{position:absolute;right:0;bottom:52px;background:rgba(29,35,31,.86);border:1px solid #657064;padding:17px 20px;width:290px}
.panel-title{font-size:12px;color:#aeb7a8;margin-bottom:14px}
.signal{display:flex;align-items:center;justify-content:space-between;border-top:1px solid #465047;padding:9px 0;font-size:13px}
.signal b{color:var(--lime);font-weight:600}
.meter{height:3px;background:#515a50;margin-top:5px}.meter i{display:block;width:78%;height:100%;background:var(--lime)}
.carousel-controls{position:absolute;right:0;bottom:0;display:flex;align-items:center;gap:10px}
.carousel-controls button{width:44px;height:44px;background:transparent;border:1px solid #727b70;color:#fff;border-radius:6px}
.carousel-controls button:hover{background:var(--lime);color:var(--ink)}
.pager{font-family:monospace;color:var(--lime);font-size:14px}
.intro{background:var(--white)}
.architecture{display:grid;grid-template-columns:1fr 1fr;gap:70px;align-items:center}
.arch-img{position:relative}.arch-img img{height:480px;border-radius:var(--radius)}
.arch-img:after{content:"感知范围 · 车辆状态 · 道路边界";position:absolute;bottom:22px;left:22px;background:var(--ink);color:var(--lime);padding:9px 13px;font-size:12px}
.specs{display:grid;grid-template-columns:repeat(2,1fr);border-top:1px solid var(--line);margin:28px 0}
.spec{padding:16px 12px 16px 0;border-bottom:1px solid var(--line)}.spec b{display:block;font-size:20px}.spec small{color:var(--muted)}
.system-list{list-style:none;display:flex;flex-wrap:wrap;gap:10px}.system-list li{font-size:13px;background:var(--mist);padding:8px 12px;border-radius:5px}.system-list b{color:#889b21;margin-right:5px}
.matrix{background:var(--mist)}
.matrix-grid{display:grid;grid-template-columns:1.18fr .82fr 1fr;gap:16px}.cap-card{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:26px;min-height:190px;position:relative;transition:.25s}.cap-card:nth-child(4){grid-column:span 2}.cap-card:hover,.product:hover,.story:hover,.quote:hover{transform:translateY(-4px);border-color:#b7ca45;box-shadow:var(--shadow)}
.cap-card:after{content:"";position:absolute;left:26px;right:26px;bottom:0;height:3px;background:var(--lime);transform:scaleX(0);transform-origin:left;transition:.25s}.cap-card:hover:after{transform:scaleX(1)}
.iconbox{width:38px;height:38px;border:1px solid var(--line);display:grid;place-items:center;border-radius:8px;margin-bottom:22px}.iconbox svg{width:20px;color:#869820}
.cap-card p,.product p{font-size:14px;color:var(--muted);margin:10px 0 16px}.tag{display:inline-block;font-size:12px;padding:4px 9px;border:1px solid var(--line);border-radius:99px;color:#697168;margin:3px 3px 0 0}
.products{background:var(--paper)}.product-grid{display:grid;grid-template-columns:1.25fr .87fr .87fr;gap:18px;align-items:stretch}.product{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:.25s}.product:first-child{grid-row:span 2}.product img{height:190px}.product:first-child img{height:300px}.product-body{padding:22px}.product-body p{min-height:50px}.product .btn{margin-top:12px;font-size:13px}
.data-band{background:var(--ink);color:var(--white);padding:72px 0}.data-band .section-head p{color:#adb6aa}.data-grid{display:grid;grid-template-columns:repeat(5,1fr);border-top:1px solid #4e584d;border-bottom:1px solid #4e584d}.metric{padding:25px 18px;border-right:1px solid #4e584d}.metric:last-child{border-right:0}.metric strong{font:700 42px/1.1 monospace;color:var(--lime);display:block}.metric span{display:block;color:#d4d8cf;font-size:13px;margin-top:10px}.metric small{color:#858e83;font-size:12px}
.process{background:var(--white)}.process-track{display:grid;grid-template-columns:repeat(5,1fr);gap:0;position:relative}.process-track:before{content:"";position:absolute;top:23px;left:5%;right:5%;height:2px;background:repeating-linear-gradient(90deg,var(--lime) 0 28px,transparent 28px 38px)}.step{position:relative;padding:0 16px 0 0}.step-dot{width:47px;height:47px;border-radius:50%;background:var(--lime);border:7px solid var(--white);outline:1px solid #b7c940;display:grid;place-items:center;font-weight:800;position:relative;z-index:1}.step h3{font-size:17px;margin-top:22px}.step p{font-size:13px;color:var(--muted);margin:9px 0}.status{font-size:11px;color:#87981e;background:#f0f5cf;padding:4px 8px}
.cases{background:var(--ink);color:var(--white)}.cases .section-head p{color:#aeb6aa}.case-layout{display:grid;grid-template-columns:1.35fr .65fr;gap:22px}.case-main{position:relative;min-height:470px;border-radius:var(--radius);overflow:hidden;background:#303830}.case-main img{height:470px;opacity:.72}.case-overlay{position:absolute;inset:0;padding:32px;display:flex;flex-direction:column;justify-content:flex-end;background:linear-gradient(transparent 25%,rgba(20,25,22,.9))}.case-overlay h3{font-size:28px}.case-info{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-top:22px}.case-info span{font-size:12px;color:#c2cabd;border-top:1px solid #687366;padding-top:7px}.case-info b{display:block;color:var(--lime);font-size:13px}.case-index{display:flex;flex-direction:column;gap:10px}.case-index button{text-align:left;padding:21px;background:#2b322d;color:#dce1d8;border:1px solid #465046;border-radius:10px;min-height:86px}.case-index button.active,.case-index button:hover{border-color:var(--lime);color:var(--lime)}.case-index small{display:block;color:#89948a;margin-bottom:5px}
.stories{background:var(--paper)}.story-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:20px}.story{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;display:grid;grid-template-columns:.9fr 1.1fr;transition:.25s}.story:nth-child(2){grid-template-columns:1fr}.story:nth-child(2) img{height:190px}.story img{height:100%}.story-copy{padding:28px}.story-copy p{font-size:15px;margin:17px 0;color:#505850}.story-meta{font-size:12px;color:#899189;border-top:1px solid var(--line);padding-top:13px}
.eco{background:var(--white)}.partner-wall{display:grid;grid-template-columns:repeat(5,1fr);border-top:1px solid var(--line);border-left:1px solid var(--line)}.partner{height:90px;display:flex;align-items:center;justify-content:center;border-right:1px solid var(--line);border-bottom:1px solid var(--line);color:#8b9289;font-weight:700;filter:grayscale(1);transition:.2s}.partner:hover{color:#80931b;background:#f4f7dc;filter:none}
.feedback{background:var(--mist)}.quote-grid{display:grid;grid-template-columns:repeat(3,1fr) .72fr;gap:14px}.quote{background:var(--white);padding:25px;border:1px solid var(--line);border-radius:var(--radius);transition:.25s}.quote:before{content:"“";font:700 40px/1 Georgia;color:var(--lime-2)}.quote p{font-size:14px;color:#505850;margin:5px 0 26px}.quote small{color:#7b847a}.response{background:var(--ink);color:var(--white);padding:25px;border-radius:var(--radius)}.response strong{display:block;color:var(--lime);font:700 34px monospace;margin:12px 0}.response p{font-size:13px;color:#c0c8bc}
.insights{background:var(--white)}.news-layout{display:grid;grid-template-columns:1.05fr .95fr;gap:20px}.feature-news{background:var(--ink);color:var(--white);border-radius:var(--radius);overflow:hidden}.feature-news img{height:245px}.feature-news div{padding:23px}.feature-news p,.news-item p{font-size:13px;color:#9aa49a;margin-top:9px}.news-list{border-top:1px solid var(--line)}.news-item{display:grid;grid-template-columns:90px 1fr;gap:17px;padding:18px 0;border-bottom:1px solid var(--line)}.news-item time{font:12px monospace;color:#8b961e}.news-item h3{font-size:17px}
.faq{background:var(--paper)}.faq-wrap{max-width:820px;margin:auto}.faq-item{border-top:1px solid var(--line)}.faq-question{width:100%;min-height:67px;background:none;text-align:left;display:flex;justify-content:space-between;align-items:center;font-weight:700;color:var(--ink);padding:10px 0}.faq-question span{font-size:24px;color:#889b20;transition:.2s}.faq-question[aria-expanded=true] span{transform:rotate(45deg)}.faq-answer{max-height:0;overflow:hidden;transition:max-height .25s ease;color:var(--muted);font-size:14px}.faq-answer div{padding:0 36px 20px 0}.faq-item.open .faq-answer{max-height:180px}
.guarantee{background:#eff3d4;padding:38px 0;border-top:1px solid #d7dfac;border-bottom:1px solid #d7dfac}.guarantee-grid{display:grid;grid-template-columns:repeat(4,1fr)}.guarantee-item{padding:5px 25px;border-right:1px solid #cbd49c}.guarantee-item:first-child{padding-left:0}.guarantee-item:last-child{border:0}.guarantee-item b{display:block;font-size:16px}.guarantee-item span{font-size:13px;color:#6e765d}
.contact{background:var(--ink);color:var(--white);padding:100px 0}.contact-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:90px;align-items:start}.contact h2{max-width:480px}.contact-copy>p{color:#bdc6b9;margin:22px 0 30px}.contact-info{display:grid;gap:10px;color:#d2d8cd;font-size:14px}.contact-info b{color:var(--lime);margin-right:8px}.contact-form{background:var(--white);color:var(--ink);border-radius:var(--radius);padding:28px}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}.field{display:grid;gap:6px}.field.full{grid-column:1/-1}.field label{font-size:13px;font-weight:700}.field input,.field select,.field textarea{width:100%;border:1px solid var(--line);background:#fafaf5;padding:11px 12px;border-radius:7px;outline:none}.field textarea{min-height:95px;resize:vertical}.field input:focus,.field select:focus,.field textarea:focus{border-color:#9eb52a;box-shadow:0 0 0 3px rgba(215,243,74,.25)}.form-foot{display:flex;align-items:center;gap:14px;margin-top:18px}.form-note{font-size:12px;color:var(--muted)}.success{display:none;color:#718715;font-size:13px;margin-top:12px}.success.show{display:block}
.footer{background:#171c19;color:#aab2a7;padding:56px 0 20px}.footer-top{display:grid;grid-template-columns:1.3fr 1fr 1fr 1fr;gap:40px;padding-bottom:42px}.footer .logo{color:var(--white);display:block;margin-bottom:13px}.footer p,.footer li{font-size:13px;color:#8e988e}.footer h3{font-size:14px;color:var(--white);margin-bottom:14px}.footer ul{list-style:none;display:grid;gap:7px}.footer a:hover{color:var(--lime)}.copyright{border-top:1px solid #343d35;padding-top:18px;font-size:12px;display:flex;justify-content:space-between;gap:20px}
@media(max-width:1024px){.navlinks{gap:12px}.navbar{gap:15px}.architecture{gap:35px}.matrix-grid{grid-template-columns:repeat(2,1fr)}.cap-card:nth-child(4){grid-column:auto}.data-grid{grid-template-columns:repeat(3,1fr)}.metric:nth-child(3){border-right:0}.metric:nth-child(-n+3){border-bottom:1px solid #4e584d}.product-grid{grid-template-columns:1fr 1fr}.product:first-child{grid-row:auto}.product:first-child img,.product img{height:220px}.quote-grid{grid-template-columns:repeat(2,1fr)}.response{grid-column:span 2}.footer-top{grid-template-columns:repeat(2,1fr)}}
@media(max-width:768px){.container{width:min(100% - 32px,var(--container))}.topline{display:none}.site-header{position:sticky}.navbar{height:68px}.navlinks{display:none;position:absolute;top:68px;left:0;right:0;background:var(--white);padding:10px 20px 22px;border-bottom:1px solid var(--line);box-shadow:0 15px 25px rgba(20,25,20,.1);flex-direction:column;align-items:stretch;gap:0}.navlinks.open{display:flex}.navlinks a{padding:12px 0;border-bottom:1px solid var(--line)}.navlinks a:after{bottom:0}.navbar>.btn{display:none}.menu-btn{display:grid;place-items:center;margin-left:auto}.hero{min-height:650px}.hero:before{background:linear-gradient(0deg,rgba(24,29,26,.98) 0%,rgba(24,29,26,.65) 70%,rgba(24,29,26,.2) 100%),url('/assets/images/2785d69f9824ba59.webp') center/cover}.hero-copy{padding:100px 0 145px}.hero-stamp{top:28px}.hero-panel{bottom:26px;left:16px;right:auto;width:calc(100% - 32px)}.carousel-controls{bottom:-57px}.architecture,.case-layout,.story-grid,.news-layout,.contact-grid{grid-template-columns:1fr}.arch-img img{height:330px}.process-track{display:grid;grid-template-columns:1fr;gap:25px}.process-track:before{top:23px;bottom:23px;left:22px;width:2px;height:auto;background:repeating-linear-gradient(0deg,var(--lime) 0 28px,transparent 28px 38px)}.step{padding-left:70px}.step-dot{position:absolute;left:0;top:0}.case-main{min-height:380px}.case-main img{height:380px}.case-info{grid-template-columns:repeat(2,1fr)}.partner-wall{grid-template-columns:repeat(3,1fr)}.guarantee-grid{grid-template-columns:repeat(2,1fr);gap:20px}.guarantee-item{border:0;padding:0}.contact-grid{gap:40px}.footer-top{grid-template-columns:1fr 1fr}}
@media(max-width:520px){body{font-size:15px}.section{padding:68px 0}.hero h1{font-size:39px}.hero-copy>p{font-size:14px}.hero-actions,.hero-actions .btn{width:100%}.hero-actions .btn{min-height:50px}.architecture{gap:28px}.specs{grid-template-columns:1fr}.matrix-grid,.product-grid,.quote-grid,.data-grid{grid-template-columns:1fr}.product:first-child img,.product img{height:205px}.metric{border-right:0!important;border-bottom:1px solid #4e584d!important}.metric:last-child{border-bottom:0!important}.response{grid-column:auto}.story{grid-template-columns:1fr}.story img{height:210px}.news-item{grid-template-columns:72px 1fr}.partner-wall{grid-template-columns:repeat(2,1fr)}.form-grid{grid-template-columns:1fr}.field.full{grid-column:auto}.form-foot{align-items:stretch;flex-direction:column}.form-foot .btn{width:100%}.copyright{display:block}.copyright span{display:block;margin-top:7px}.footer-top{grid-template-columns:1fr}.case-overlay{padding:22px}.case-overlay h3{font-size:23px}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;transition:none!important;animation:none!important}}
:focus-visible{outline:3px solid var(--lime-2);outline-offset:3px}