/* roulang page: index */
:root{
 --lime:#baf34b;--lime-dark:#8bc52e;--orange:#ff8b3d;--ink:#171a18;
 --muted:#68706a;--warm:#f6f4ee;--paper:#fffefa;--line:#dddcd3;
 --soft:#ecebe4;--radius:18px;--shadow:0 14px 38px rgba(27,34,27,.08);
 --font:Inter,"PingFang SC","Microsoft YaHei","Noto Sans SC",Arial,sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font);background:var(--warm);color:var(--ink);line-height:1.7;overflow-x:hidden}
a{color:inherit;text-decoration:none}
img{display:block;width:100%;object-fit:cover}
button,input,textarea{font:inherit}
button{border:0;cursor:pointer}
button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible{outline:3px solid var(--orange);outline-offset:3px}
.container{width:min(1200px,calc(100% - 48px));margin:auto}
.eyebrow{display:inline-flex;align-items:center;gap:8px;color:#5c771f;font-size:13px;font-weight:800;letter-spacing:.08em;text-transform:uppercase}
.eyebrow:before{content:"";width:24px;height:3px;background:var(--orange);border-radius:4px}
.section{padding:105px 0;position:relative}
.section-head{max-width:690px;margin-bottom:42px}
.section-head h2{font-size:clamp(30px,4vw,52px);line-height:1.16;letter-spacing:-.045em;margin-top:12px}
.section-head p{color:var(--muted);margin-top:18px;font-size:16px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:48px;padding:0 22px;border-radius:10px;font-weight:800;transition:.25s ease;border:1px solid transparent}
.btn:hover{transform:translateY(-2px)}
.btn-primary{background:var(--lime);color:var(--ink);box-shadow:0 8px 0 #91bb38}
.btn-primary:hover{background:#d0ff68;box-shadow:0 5px 0 #91bb38}
.btn-secondary{background:transparent;border-color:var(--ink);color:var(--ink)}
.btn-secondary:hover{background:var(--ink);color:#fff}
.btn-light{background:#fff;color:var(--ink)}
.btn-light:hover{background:var(--lime)}
.tag{display:inline-flex;padding:5px 11px;border-radius:8px;background:#eef8d8;color:#52731e;font-size:12px;font-weight:800}
header{position:sticky;top:0;z-index:20;background:rgba(246,244,238,.96);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.topbar{min-height:58px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:20px}
.logo{font-size:20px;font-weight:950;letter-spacing:-.06em;white-space:nowrap}
.logo i{display:inline-block;width:10px;height:10px;background:var(--orange);border-radius:50%;margin-right:7px}
.trust{display:flex;gap:24px;color:var(--muted);font-size:13px}
.topbar .btn{min-height:36px;padding:0 16px;font-size:13px}
.navbar{min-height:64px;display:flex;align-items:center;justify-content:flex-end}
.navlinks{display:flex;align-items:center;gap:4px;list-style:none}
.navlinks a{display:block;padding:10px 14px;border-radius:8px;font-size:14px;color:#56605a;transition:.2s}
.navlinks a:hover,.navlinks a.active{background:var(--ink);color:#fff}
.menu-toggle{display:none;background:var(--ink);color:#fff;border-radius:8px;width:44px;height:44px;font-size:22px}
.hero{min-height:650px;padding:74px 0 42px;background:var(--paper);position:relative;overflow:hidden}
.hero:after{content:"";position:absolute;right:-13%;top:-20%;width:58%;height:125%;background:var(--lime);transform:skewX(-13deg);z-index:0}
.hero-grid{display:grid;grid-template-columns:5fr 7fr;align-items:center;gap:38px;position:relative;z-index:1}
.hero-copy{padding:35px 0 40px}
.hero h1{font-size:clamp(43px,6vw,78px);line-height:1.06;letter-spacing:-.07em;max-width:610px;margin:16px 0 25px}
.hero h1 em{font-style:normal;color:#59781c}
.hero-copy p{max-width:590px;font-size:18px;color:#4e5851}
.actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:31px}
.hero-visual{position:relative;padding:22px 0 22px 38px}
.hero-image{height:420px;border-radius:22px;box-shadow:20px 22px 0 rgba(23,26,24,.1);border:8px solid var(--ink)}
.hero-panel{position:absolute;left:0;bottom:0;background:var(--ink);color:#fff;border-radius:14px;padding:17px 20px;min-width:205px}
.hero-panel strong{display:block;color:var(--lime);font-size:27px;line-height:1.2}
.scene-tabs{display:flex;gap:8px;flex-wrap:wrap;margin-top:28px}
.scene-tabs button{background:#fff;border:1px solid var(--line);border-radius:8px;padding:8px 12px;font-size:12px;color:#5b645e}
.scene-tabs button.active{background:var(--ink);color:var(--lime);border-color:var(--ink)}
.carousel-dots{display:flex;gap:7px;position:absolute;right:20px;bottom:8px}
.carousel-dots button{height:7px;width:28px;background:rgba(23,26,24,.35);border-radius:8px}
.carousel-dots button.active{background:var(--ink);width:48px}
.intro{background:#fff}
.intro-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:70px;align-items:center}
.intro-photo{position:relative}
.intro-photo img{height:450px;border-radius:22px}
.photo-note{position:absolute;right:-28px;bottom:28px;background:var(--orange);padding:20px;border-radius:14px;width:190px;font-weight:800}
.module-list{border-top:1px solid var(--line);margin-top:28px}
.module-list div{display:flex;justify-content:space-between;gap:18px;padding:17px 0;border-bottom:1px solid var(--line)}
.module-list span{color:var(--muted);font-size:14px;text-align:right}
.verify{margin-top:28px;padding:18px;background:var(--warm);border-left:4px solid var(--lime-dark);font-size:14px}
.pain{background:var(--soft)}
.pain-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.pain-card{background:#fff;border-radius:var(--radius);padding:28px;border:1px solid var(--line)}
.pain-card h3{font-size:21px;margin-bottom:16px}
.pain-card ul{list-style:none}
.pain-card li{padding:13px 0;border-top:1px solid var(--line);color:#56605a}
.pain-card li:before{content:"×";color:var(--orange);font-weight:900;margin-right:10px}
.arch{background:var(--paper)}
.architecture{min-height:430px;display:grid;grid-template-columns:1fr 1.2fr 1fr;align-items:center;gap:24px}
.arch-side{display:grid;gap:14px}
.arch-node{padding:18px 20px;background:#fff;border:1px solid var(--line);border-radius:13px;position:relative}
.arch-node strong{display:block;font-size:16px}.arch-node small{color:var(--muted)}
.arch-core{background:var(--ink);color:#fff;border-radius:50%;width:260px;height:260px;margin:auto;display:flex;align-items:center;justify-content:center;text-align:center;border:17px solid var(--lime);box-shadow:0 0 0 12px rgba(186,243,75,.2)}
.arch-core strong{font-size:26px;display:block}.arch-core span{color:var(--lime);font-size:13px}
.steps{background:#fff}
.timeline{display:grid;grid-template-columns:repeat(5,1fr);gap:0;border-top:2px solid var(--ink);margin-top:60px}
.step{padding:25px 18px 0;position:relative}
.step:before{content:"";position:absolute;top:-11px;left:18px;width:20px;height:20px;background:var(--orange);border:5px solid #fff;border-radius:50%;box-shadow:0 0 0 2px var(--ink)}
.step b{font-size:13px;color:#7a8d43}.step h3{font-size:18px;margin:10px 0 8px}.step p{font-size:14px;color:var(--muted)}
.advantages{background:var(--warm)}
.adv-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.adv-card{display:grid;grid-template-columns:65px 1fr;gap:18px;padding:25px;background:#fff;border:1px solid var(--line);border-radius:16px;transition:.25s}
.adv-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.adv-num{font-size:34px;font-weight:950;color:var(--orange);line-height:1}
.adv-card h3{font-size:19px}.adv-card p{color:var(--muted);font-size:14px;margin-top:6px}
.functions{background:#fff}
.function-rail{display:grid;grid-template-columns:1.35fr .8fr .8fr;gap:18px}
.function-card{min-height:310px;border-radius:19px;overflow:hidden;position:relative;background:var(--ink);color:#fff}
.function-card img{height:100%;opacity:.64}
.function-card .function-body{position:absolute;inset:auto 0 0;padding:25px;background:linear-gradient(transparent,rgba(0,0,0,.9))}
.function-card h3{font-size:23px}.function-card p{font-size:14px;color:#d9ddd7;margin:7px 0 14px}
.case{background:var(--ink);color:#fff;overflow:hidden}
.case .section-head p{color:#aeb8ad}.case-grid{display:grid;grid-template-columns:1.25fr .75fr;gap:32px;align-items:center}
.case-photo{height:410px;border-radius:20px;overflow:hidden;position:relative;border:1px solid #4a5149}
.case-photo img{height:100%;opacity:.75}.route{position:absolute;left:10%;bottom:16%;width:70%;height:35%;border-top:3px solid var(--lime);border-radius:50%;transform:rotate(-13deg)}
.case-stats{display:grid;gap:14px}.case-stat{padding:21px;border:1px solid #485148;border-radius:13px}.case-stat strong{font-size:35px;color:var(--lime);display:block}.case-stat span{color:#c2ccc0;font-size:14px}
.stories{background:var(--paper)}
.story-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:24px}
.story-main{background:#e8f3ca;border-radius:20px;padding:36px;display:grid;grid-template-columns:1fr 1fr;gap:25px;align-items:center}
.story-main img{height:250px;border-radius:15px}.story-main h3{font-size:26px}.story-main p{color:#56634c;margin-top:13px}
.story-side{padding:31px;border:1px solid var(--line);border-radius:20px;background:#fff}.story-side blockquote{font-size:23px;line-height:1.45;font-weight:700}.story-side cite{display:block;color:var(--muted);font-style:normal;margin-top:22px}
.metrics{background:var(--lime)}
.metrics .section-head{margin-bottom:28px}.metric-bar{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid rgba(23,26,24,.4);border-bottom:1px solid rgba(23,26,24,.4)}
.metric{padding:25px 20px;border-right:1px solid rgba(23,26,24,.3)}.metric:last-child{border:0}.metric strong{font-size:39px;display:block;letter-spacing:-.05em}.metric span{font-size:14px}
.reviews{background:#fff}
.review-layout{display:grid;grid-template-columns:.7fr 1.3fr;gap:60px;align-items:center}.quote{font-size:clamp(28px,3.6vw,48px);line-height:1.3;font-weight:800;letter-spacing:-.04em}.review-person{margin-top:25px;color:var(--muted)}.review-person b{display:block;color:var(--ink)}
.scenes{background:var(--soft)}
.scene-matrix{display:grid;grid-template-columns:repeat(4,1fr);gap:13px}.scene-item{background:#fff;padding:24px 18px;border-radius:14px;min-height:145px;border-bottom:4px solid var(--orange)}.scene-item h3{font-size:17px}.scene-item p{font-size:13px;color:var(--muted);margin-top:7px}
.news{background:var(--paper)}
.news-list{border-top:1px solid var(--line)}.news-item{display:grid;grid-template-columns:110px 1fr auto;gap:25px;align-items:center;padding:22px 0;border-bottom:1px solid var(--line)}.news-item time{color:var(--orange);font-weight:800;font-size:13px}.news-item h3{font-size:18px}.news-item p{color:var(--muted);font-size:14px;margin-top:3px}.news-arrow{font-size:24px}
.faq{background:#fff}
.faq-list{max-width:850px}.faq-item{border-top:1px solid var(--line)}.faq-q{width:100%;padding:22px 0;background:none;text-align:left;display:flex;justify-content:space-between;gap:20px;font-weight:800;font-size:17px}.faq-q span:last-child{font-size:24px;color:var(--orange);transition:.2s}.faq-q[aria-expanded=true] span:last-child{transform:rotate(45deg)}.faq-a{display:none;color:var(--muted);font-size:15px;padding:0 50px 22px 0}.faq-a.open{display:block}
.cta{background:var(--orange);padding:85px 0}.cta-grid{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:start}.cta h2{font-size:clamp(35px,5vw,62px);line-height:1.1;letter-spacing:-.06em}.cta p{margin-top:18px;font-size:17px;max-width:470px}.contact-form{background:#fff;border-radius:18px;padding:28px;display:grid;gap:14px;box-shadow:var(--shadow)}.field{display:grid;gap:6px}.field label{font-size:13px;font-weight:800}.field input,.field textarea{width:100%;border:1px solid var(--line);background:#faf9f5;border-radius:9px;padding:12px 13px;min-height:44px;color:var(--ink)}.field textarea{min-height:88px;resize:vertical}.field input:focus,.field textarea:focus{border-color:var(--lime-dark);outline:3px solid rgba(186,243,75,.35)}.form-note{font-size:12px;color:var(--muted)}.form-status{display:none;color:#4e7819;font-size:14px;font-weight:700}
footer{background:var(--ink);color:#fff;padding:60px 0 25px}.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:35px;padding-bottom:45px}.footer-brand p{color:#aeb8ad;margin-top:15px;max-width:270px;font-size:14px}.footer-title{font-size:14px;color:var(--lime);margin-bottom:14px;font-weight:800}.footer-links{list-style:none;display:grid;gap:8px;color:#b8c0b6;font-size:14px}.footer-links a:hover{color:var(--lime)}.copyright{border-top:1px solid #3c443c;padding-top:20px;color:#8f9990;font-size:12px;display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap}
@media(max-width:1024px){.hero-grid{grid-template-columns:1fr 1fr}.intro-grid{gap:35px}.architecture{grid-template-columns:1fr 1fr}.arch-core{width:220px;height:220px}.arch-side:last-child{grid-column:1/-1;grid-template-columns:1fr 1fr}.scene-matrix{grid-template-columns:repeat(2,1fr)}}
@media(max-width:768px){.container{width:min(100% - 40px,600px)}.trust{display:none}.navbar{min-height:58px}.menu-toggle{display:block}.navlinks{display:none;position:absolute;left:20px;right:20px;top:116px;background:var(--ink);padding:10px;border-radius:12px;box-shadow:var(--shadow)}.navlinks.open{display:grid}.navlinks a{padding:14px;color:#fff}.navlinks a.active{background:var(--lime);color:var(--ink)}.hero{padding:45px 0 38px}.hero:after{width:100%;height:42%;top:auto;bottom:-12%;right:-8%;transform:skewY(-7deg)}.hero-grid,.intro-grid,.case-grid,.story-grid,.review-layout,.cta-grid{grid-template-columns:1fr}.hero-copy{padding:10px 0}.hero h1{font-size:clamp(42px,12vw,62px)}.hero-copy p{font-size:16px}.hero-visual{padding:15px 0}.hero-image{height:330px}.section{padding:72px 0}.architecture{grid-template-columns:1fr;gap:25px}.arch-core{grid-row:1;width:210px;height:210px}.arch-side:last-child{grid-column:auto;grid-template-columns:1fr}.timeline{grid-template-columns:1fr;border-top:0;border-left:2px solid var(--ink);margin:30px 0 0 12px}.step{padding:5px 18px 28px}.step:before{top:5px;left:-11px}.adv-grid{grid-template-columns:1fr}.function-rail{display:flex;overflow-x:auto;padding-bottom:12px}.function-card{min-width:285px}.story-main{grid-template-columns:1fr}.story-main img{height:220px}.metric-bar{grid-template-columns:1fr 1fr}.metric:nth-child(2){border-right:0}.metric:nth-child(-n+2){border-bottom:1px solid rgba(23,26,24,.3)}.metric{padding:20px 12px}.metric strong{font-size:31px}.news-item{grid-template-columns:75px 1fr}.news-arrow{display:none}.footer-grid{grid-template-columns:1fr 1fr}}
@media(max-width:520px){.logo{font-size:17px}.topbar .btn{display:none}.container{width:calc(100% - 40px)}.hero-image{height:270px}.actions{display:grid}.actions .btn{width:100%}.intro-photo img{height:300px}.photo-note{right:12px;bottom:15px;padding:13px;width:160px;font-size:13px}.pain-grid{grid-template-columns:1fr}.scene-matrix{grid-template-columns:1fr 1fr;gap:9px}.scene-item{padding:18px 13px;min-height:135px}.quote{font-size:30px}.cta{padding:65px 0}.contact-form{padding:21px}.footer-grid{grid-template-columns:1fr}.copyright{display:block}.copyright span{display:block;margin-top:8px}}
@media(min-width:1280px){.hero{min-height:700px}.section{padding-top:120px;padding-bottom:120px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important}}