/* roulang page: index */
:root{
--ink:#eaf2fb;--muted:#9eafc1;--deep:#07111e;--deep2:#0b1b2c;--panel:rgba(18,39,59,.7);
--line:rgba(157,189,219,.19);--cyan:#48d9ff;--blue:#278eff;--orange:#ff9e45;
--white:#fff;--radius:22px;--shadow:0 24px 70px rgba(0,0,0,.28);--max:1200px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:"Noto Sans SC","Microsoft YaHei",Arial,sans-serif;background:#f2f6f9;color:#182939;line-height:1.75;overflow-x:hidden}
a{text-decoration:none;color:inherit}
img{display:block;max-width:100%;height:auto}
button,input,select,textarea{font-family:inherit}
button{border:0;cursor:pointer}
:focus-visible{outline:3px solid var(--cyan);outline-offset:3px}
.container{width:min(calc(100% - 48px),var(--max));margin:auto}
.eyebrow{display:inline-flex;align-items:center;gap:9px;color:var(--cyan);font-size:13px;letter-spacing:.16em;font-weight:700;text-transform:uppercase}
.eyebrow:before{content:"";width:24px;height:2px;background:var(--orange);display:inline-block}
.section{padding:105px 0;position:relative}
.section.dark{background:var(--deep);color:var(--ink)}
.section.soft{background:#eaf1f5}
.section-head{display:flex;align-items:end;justify-content:space-between;gap:35px;margin-bottom:45px}
.section-head h2{font-size:clamp(28px,4vw,48px);line-height:1.2;letter-spacing:-.04em;color:#13283a}
.dark .section-head h2{color:var(--ink)}
.section-head p{max-width:570px;color:#6d7f90;font-size:15px}
.dark .section-head p{color:var(--muted)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:48px;padding:10px 22px;border-radius:999px;font-size:14px;font-weight:700;transition:.25s ease;border:1px solid transparent}
.btn-primary{background:linear-gradient(100deg,var(--cyan),#6ea7ff);color:#061323;box-shadow:0 0 28px rgba(72,217,255,.3)}
.btn-primary:hover{transform:translateY(-3px);box-shadow:0 0 40px rgba(72,217,255,.55)}
.btn-outline{border-color:rgba(255,255,255,.35);color:#fff;background:rgba(255,255,255,.06)}
.btn-outline:hover{border-color:var(--cyan);background:rgba(72,217,255,.12)}
.btn-light{background:#fff;color:#0b1c2b}
.btn-light:hover{transform:translateY(-3px);box-shadow:0 12px 25px rgba(0,0,0,.15)}
.badge{display:inline-flex;padding:4px 10px;border-radius:99px;background:rgba(72,217,255,.12);color:#25a8d0;font-size:12px;font-weight:700}
.dark .badge{color:var(--cyan)}
.site-header{position:relative;z-index:20;background:#07111e;color:var(--ink)}
.utility{height:38px;border-bottom:1px solid rgba(255,255,255,.09);font-size:12px;color:var(--muted)}
.utility .container,.mainnav .container{height:100%;display:flex;align-items:center;justify-content:space-between}
.utility-left,.utility-right,.trust-mini{display:flex;align-items:center;gap:18px}
.utility a{color:var(--ink)}
.utility a:hover{color:var(--cyan)}
.trust-mini{gap:7px}
.trust-mini b{color:var(--cyan);font-family:monospace;font-size:11px}
.mainnav{height:78px;background:rgba(7,17,30,.9);transition:.3s}
.mainnav.stuck{position:fixed;top:0;left:0;right:0;background:rgba(5,15,27,.96);box-shadow:0 5px 25px rgba(0,0,0,.25);border-bottom:1px solid rgba(72,217,255,.25)}
.logo{display:flex;align-items:center;gap:11px;font-weight:900;white-space:nowrap}
.logo-mark{width:37px;height:37px;border:2px solid var(--cyan);border-radius:50%;position:relative;box-shadow:0 0 18px rgba(72,217,255,.3)}
.logo-mark:before,.logo-mark:after{content:"";position:absolute;left:8px;right:8px;height:3px;background:var(--cyan);transform:skew(-28deg)}
.logo-mark:before{top:11px}.logo-mark:after{top:20px}
.logo span{font-size:17px;letter-spacing:.03em}
.navlinks{display:flex;align-items:center;gap:25px;margin-left:auto;margin-right:25px}
.navlinks a{font-size:13px;color:#b8c7d5;transition:.2s;white-space:nowrap}
.navlinks a:hover,.navlinks a.active{color:var(--cyan)}
.menu-toggle{display:none;background:transparent;color:#fff;font-size:25px;width:44px;height:44px}
.hero{min-height:680px;background:#06101d;color:#fff;position:relative;overflow:hidden}
.slides{height:680px;position:relative}
.slide{position:absolute;inset:0;opacity:0;visibility:hidden;display:flex;align-items:center;background-size:cover;background-position:center;transition:opacity .7s ease}
.slide:before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 72% 40%,rgba(24,122,204,.17),transparent 33%),linear-gradient(90deg,rgba(3,9,16,.96) 8%,rgba(4,15,26,.78) 45%,rgba(4,18,34,.2) 100%)}
.slide.active{opacity:1;visibility:visible}
.slide-content{position:relative;z-index:1;max-width:720px;padding-top:40px}
.slide-content h1{font-size:clamp(38px,6vw,76px);line-height:1.13;letter-spacing:-.065em;margin:18px 0 25px}
.slide-content p{max-width:630px;color:#c5d3df;font-size:17px;line-height:1.9;margin-bottom:32px}
.hero-actions{display:flex;flex-wrap:wrap;gap:13px}
.slide-number{position:absolute;right:0;bottom:55px;color:rgba(255,255,255,.55);font:13px monospace;z-index:2}
.slider-control{position:absolute;right:calc((100% - var(--max))/2);bottom:48px;display:flex;gap:9px;z-index:3}
.slider-control button{width:43px;height:43px;border-radius:50%;color:#fff;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.28);font-size:20px}
.slider-control button:hover{background:var(--cyan);color:#061323}
.dots{position:absolute;left:50%;bottom:49px;transform:translateX(-50%);display:flex;gap:8px;z-index:3}
.dot{width:28px;height:4px;border-radius:5px;background:rgba(255,255,255,.3);cursor:pointer}
.dot.active{background:var(--cyan);box-shadow:0 0 12px var(--cyan)}
.trustbar{background:#0b1826;color:#dbe8f0;border-bottom:1px solid var(--line);border-top:1px solid var(--line)}
.trust-grid{display:grid;grid-template-columns:repeat(5,1fr);min-height:90px}
.trust-item{padding:17px 18px;border-right:1px solid var(--line);display:flex;flex-direction:column;justify-content:center;gap:1px}
.trust-item:last-child{border-right:0}
.trust-item strong{font:700 17px/1.3 monospace;color:var(--cyan)}
.trust-item span{font-size:12px;color:#9fb0bf}
.intro-grid{display:grid;grid-template-columns:1fr 1fr;gap:75px;align-items:center}
.intro-photo{position:relative}
.intro-photo img{width:100%;height:475px;object-fit:cover;border-radius:var(--radius);box-shadow:var(--shadow)}
.photo-note{position:absolute;bottom:24px;right:-20px;padding:16px 20px;background:rgba(7,17,30,.9);border:1px solid rgba(72,217,255,.35);border-radius:15px;color:#fff;font-size:13px}
.intro-copy h2{font-size:clamp(30px,4vw,52px);line-height:1.2;margin:16px 0 22px;letter-spacing:-.04em}
.intro-copy p{color:#657789;font-size:16px;margin-bottom:24px}
.spec-list{list-style:none;border-top:1px solid #d6e0e6}
.spec-list li{display:flex;justify-content:space-between;gap:20px;padding:13px 0;border-bottom:1px solid #d6e0e6;font-size:14px}
.spec-list b{color:#19344a}
.spec-list span{color:#657789;text-align:right}
.glass-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:17px}
.glass-card{padding:27px 25px;min-height:190px;color:var(--ink);background:linear-gradient(145deg,rgba(25,56,82,.82),rgba(10,28,46,.72));border:1px solid var(--line);border-radius:18px;backdrop-filter:blur(16px);transition:.3s}
.glass-card:hover{transform:translateY(-6px);border-color:var(--cyan);box-shadow:0 0 28px rgba(72,217,255,.15)}
.icon-ring{width:44px;height:44px;border-radius:14px;background:rgba(72,217,255,.12);color:var(--cyan);display:grid;place-items:center;font-size:19px;margin-bottom:17px}
.glass-card h3{font-size:19px;margin-bottom:9px}
.glass-card p{font-size:13px;color:var(--muted);line-height:1.7}
.product-grid{display:grid;grid-template-columns:1.28fr .86fr .86fr;gap:18px;align-items:stretch}
.product-card{background:#fff;border-radius:20px;overflow:hidden;border:1px solid #dce5ea;box-shadow:0 10px 30px rgba(19,47,67,.06);transition:.3s}
.product-card:hover{transform:translateY(-6px);box-shadow:0 20px 40px rgba(19,47,67,.13)}
.product-card.featured{background:#0d2032;color:#edf7ff;border-color:#1c4a68}
.product-image{height:235px;overflow:hidden;background:#dbe5ea}
.product-card:not(.featured) .product-image{height:190px}
.product-image img{width:100%;height:100%;object-fit:cover;transition:.5s}
.product-card:hover img{transform:scale(1.05)}
.product-body{padding:25px}
.product-body h3{font-size:22px;line-height:1.35;margin:11px 0}
.product-body p{color:#6f8190;font-size:13px;line-height:1.8;min-height:54px}
.featured .product-body p{color:#a7bac9}
.product-meta{display:flex;justify-content:space-between;align-items:center;margin-top:20px;padding-top:17px;border-top:1px solid #e1e8ec}
.featured .product-meta{border-color:rgba(255,255,255,.14)}
.price{font-size:18px;font-weight:800;color:var(--orange)}
.scene-band{display:grid;grid-template-columns:1.1fr 1fr;min-height:540px;background:#102538;color:#fff;border-radius:26px;overflow:hidden}
.scene-image{min-height:350px;background:url('/assets/images/8b168ecaa1dcb51d.jpg') center/cover}
.scene-copy{padding:58px 55px;display:flex;flex-direction:column;justify-content:center}
.scene-copy h2{font-size:clamp(30px,4vw,50px);line-height:1.2;margin:14px 0 20px}
.scene-copy p{color:#adc0ce;margin-bottom:25px}
.scene-list{display:grid;grid-template-columns:1fr 1fr;gap:12px;list-style:none}
.scene-list li{padding:12px 14px;border:1px solid rgba(255,255,255,.14);border-radius:10px;color:#dce8f0;font-size:13px}
.scene-list li:before{content:"◆";color:var(--cyan);font-size:8px;margin-right:8px}
.scene-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:18px}
.scene-tile{height:190px;padding:20px;display:flex;align-items:end;border-radius:17px;overflow:hidden;position:relative;background-size:cover;background-position:center;color:#fff}
.scene-tile:before{content:"";position:absolute;inset:0;background:linear-gradient(transparent 20%,rgba(2,10,17,.9))}
.scene-tile div{position:relative;z-index:1}
.scene-tile h3{font-size:17px}
.scene-tile p{font-size:11px;color:#c9d5dc;margin-top:4px}
.demo-stage{display:grid;grid-template-columns:1fr 1fr;gap:26px;align-items:stretch}
.demo-visual{min-height:480px;position:relative;border-radius:24px;overflow:hidden;background:#0a1725}
.demo-visual img{width:100%;height:100%;object-fit:cover}
.demo-overlay{position:absolute;left:25px;bottom:23px;background:rgba(4,13,22,.8);backdrop-filter:blur(10px);padding:15px 18px;border-radius:13px;color:#fff;font-size:13px}
.tabs{display:flex;gap:8px;margin-bottom:20px;flex-wrap:wrap}
.tab{padding:10px 16px;border-radius:999px;border:1px solid #cfdce3;background:#fff;color:#587080;font-size:13px;cursor:pointer}
.tab.active,.tab:hover{background:#102c43;border-color:#102c43;color:#fff}
.spec-panel{background:#fff;border-radius:23px;padding:31px;box-shadow:0 15px 35px rgba(20,48,67,.08)}
.spec-panel h3{font-size:27px;margin-bottom:8px}
.spec-panel>p{font-size:13px;color:#738694;margin-bottom:20px}
.spec-table{width:100%;border-collapse:collapse}
.spec-table th,.spec-table td{padding:13px 5px;text-align:left;border-bottom:1px solid #e2e9ed;font-size:13px}
.spec-table th{font-weight:500;color:#718493;width:45%}
.spec-table td{font-weight:700;color:#18364d}
.season-wrap{overflow:auto}
.season-table{width:100%;min-width:680px;border-collapse:separate;border-spacing:0;background:#fff;border:1px solid #dce6eb;border-radius:18px;overflow:hidden}
.season-table th,.season-table td{padding:18px 20px;border-bottom:1px solid #e2e8ec;text-align:left;font-size:13px}
.season-table th{color:#527084;background:#eef4f7;font-size:12px}
.season-table tr:last-child td{border-bottom:0}
.season-table td:first-child{font-weight:800;color:#16344a}
.service-grid{display:grid;grid-template-columns:1fr 1.15fr 1fr;gap:20px;align-items:stretch}
.service-card{background:#fff;border:1px solid #d9e4e9;border-radius:20px;padding:30px;transition:.25s}
.service-card:nth-child(2){background:#112b42;color:#fff;transform:translateY(-12px)}
.service-card:hover{box-shadow:0 18px 35px rgba(20,50,70,.12)}
.service-card h3{font-size:21px;margin:15px 0 9px}
.service-card p{font-size:13px;color:#738492}
.service-card:nth-child(2) p{color:#b6c8d4}
.service-card ul{list-style:none;margin:21px 0}
.service-card li{font-size:13px;padding:8px 0;border-bottom:1px dashed #dbe4e8}
.service-card:nth-child(2) li{border-color:rgba(255,255,255,.15)}
.service-card li:before{content:"✓";color:var(--cyan);font-weight:900;margin-right:9px}
.service-card .btn{width:100%}
.metric-band{background:linear-gradient(110deg,#0b1e31,#123c58);color:#fff}
.metric-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:25px}
.metric{padding:12px 20px;border-left:1px solid rgba(255,255,255,.2)}
.metric strong{display:block;font:800 43px/1.2 monospace;color:var(--cyan)}
.metric span{font-size:13px;color:#b4c7d3}
.proof-layout{display:grid;grid-template-columns:1fr 1.4fr;gap:65px;align-items:center}
.proof-layout h2{font-size:clamp(29px,4vw,48px);line-height:1.2;margin:15px 0}
.proof-layout p{font-size:15px;color:#6c7f8f}
.proof-points{display:grid;gap:13px}
.proof-point{display:flex;gap:15px;padding:20px 22px;border-radius:15px;background:#fff;border:1px solid #dfe8ed}
.proof-point b{display:block;color:#19374c;margin-bottom:3px}
.proof-point span{font-size:13px;color:#718290}
.point-no{flex:0 0 34px;width:34px;height:34px;display:grid;place-items:center;border-radius:10px;background:#102e47;color:var(--cyan);font:700 13px monospace}
.process{display:grid;grid-template-columns:repeat(4,1fr);gap:0;position:relative}
.process:before{content:"";height:1px;background:#bed0da;position:absolute;top:29px;left:10%;right:10%}
.process-step{position:relative;text-align:center;padding:0 18px}
.process-number{width:59px;height:59px;margin:0 auto 20px;display:grid;place-items:center;border:1px solid var(--cyan);border-radius:50%;background:#eff6f9;color:#0d4565;font:700 16px monospace;position:relative;z-index:1}
.process-step h3{font-size:17px;margin-bottom:7px}
.process-step p{font-size:12px;color:#718493}
.review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:17px}
.review-card{background:rgba(255,255,255,.06);border:1px solid var(--line);border-radius:19px;padding:27px;color:#dce9f1}
.stars{color:var(--orange);letter-spacing:3px;font-size:14px}
.review-card blockquote{font-size:14px;line-height:1.9;margin:16px 0 22px;color:#c2d1dc}
.reviewer{display:flex;align-items:center;gap:12px;border-top:1px solid var(--line);padding-top:17px}
.avatar{width:37px;height:37px;border-radius:50%;display:grid;place-items:center;background:#244a65;color:var(--cyan);font-weight:800}
.reviewer small{color:#8fa5b5}
.quote-band{background:#f6f9fa}
.quote-layout{display:grid;grid-template-columns:1fr 1fr;gap:55px;align-items:center}
.quote-layout h2{font-size:clamp(28px,4vw,46px);line-height:1.25;margin:15px 0}
.quote-layout p{color:#718290;font-size:15px}
.quote-mark{font-size:100px;line-height:.6;color:#b9eaf4;font-family:Georgia}
.faq-list{max-width:860px;margin:auto}
.faq-item{border-bottom:1px solid #ccdbe3}
.faq-question{width:100%;display:flex;justify-content:space-between;align-items:center;text-align:left;padding:21px 4px;background:transparent;color:#17334a;font-size:16px;font-weight:700}
.faq-question span{font-size:23px;color:#43bcd8;transition:.25s}
.faq-answer{max-height:0;overflow:hidden;color:#718290;font-size:14px;transition:max-height .35s ease}
.faq-answer p{padding:0 40px 20px 4px}
.faq-item.open .faq-answer{max-height:180px}
.faq-item.open .faq-question span{transform:rotate(45deg)}
.cta-section{padding:105px 0;background:radial-gradient(circle at 75% 20%,#1d6890 0,#0a2338 39%,#061321 100%);color:#fff}
.cta-layout{display:grid;grid-template-columns:1fr 1fr;gap:65px;align-items:center}
.cta-layout h2{font-size:clamp(32px,5vw,59px);line-height:1.17;letter-spacing:-.05em;margin:16px 0 20px}
.cta-layout p{color:#b9ccd8;max-width:520px}
.form-card{padding:29px;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.2);border-radius:22px;backdrop-filter:blur(14px)}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.form-card label{display:block;color:#c7d6df;font-size:12px;margin-bottom:13px}
.form-card input,.form-card select,.form-card textarea{width:100%;margin-top:6px;padding:12px 14px;border:1px solid rgba(255,255,255,.2);background:rgba(0,0,0,.18);border-radius:10px;color:#fff;font-size:13px}
.form-card select option{color:#162b3c}
.form-card textarea{height:82px;resize:vertical}
.form-card .btn{width:100%;margin-top:3px}
.site-footer{background:#050d16;color:#94a8b7;padding:58px 0 22px}
.footer-top{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:45px;padding-bottom:45px;border-bottom:1px solid rgba(255,255,255,.1)}
.footer-brand p{font-size:13px;max-width:280px;margin-top:16px;line-height:1.8}
.site-footer h3{font-size:14px;color:#e9f3f8;margin-bottom:15px}
.footer-links{list-style:none;display:grid;gap:7px;font-size:13px}
.footer-links a:hover{color:var(--cyan)}
.footer-bottom{display:flex;justify-content:space-between;gap:20px;padding-top:19px;font-size:11px}
@media(max-width:1024px){
:root{--max:920px}.navlinks{gap:14px;margin-right:15px}.navlinks a{font-size:12px}.mainnav .btn{padding:9px 15px;font-size:12px}
.intro-grid,.proof-layout{gap:35px}.scene-copy{padding:40px}.product-grid{grid-template-columns:1fr 1fr}.product-card.featured{grid-row:span 2}.product-card.featured .product-image{height:270px}.product-card:not(.featured) .product-image{height:165px}
}
@media(max-width:768px){
.container{width:min(calc(100% - 34px),620px)}.utility{height:39px}.utility-right{display:none}.utility-left{justify-content:space-between;width:100%}.mainnav{height:68px}.navlinks{position:fixed;top:107px;right:0;bottom:0;width:min(84vw,350px);padding:38px 28px;display:flex;align-items:stretch;flex-direction:column;gap:5px;background:rgba(5,17,29,.97);backdrop-filter:blur(18px);transform:translateX(105%);transition:.35s;box-shadow:-18px 0 45px rgba(0,0,0,.3);border-left:1px solid rgba(72,217,255,.25);margin:0}.navlinks.open{transform:translateX(0)}.navlinks a{display:flex;align-items:center;min-height:48px;font-size:15px;border-bottom:1px solid rgba(255,255,255,.1)}.mainnav>.container>.btn{display:none}.menu-toggle{display:block}
.slides,.slide{min-height:650px;height:650px}.slide{background-position:62% center}.slide-content{padding-top:15px}.slide-content h1{font-size:clamp(37px,10vw,60px)}.slide-content p{font-size:15px;line-height:1.8}.slider-control{right:17px;bottom:45px}.dots{left:30px;transform:none;bottom:64px}
.trust-grid{grid-template-columns:repeat(5,minmax(135px,1fr));overflow-x:auto}.trust-item{min-width:135px}.section{padding:75px 0}.section-head{display:block;margin-bottom:30px}.section-head h2{margin:13px 0}.section-head p{font-size:14px}
.intro-grid,.demo-stage,.quote-layout,.cta-layout{grid-template-columns:1fr}.intro-photo img{height:330px}.photo-note{right:15px}.glass-grid{grid-template-columns:1fr 1fr}.product-grid{grid-template-columns:1fr}.product-card.featured{grid-row:auto}.product-card.featured .product-image,.product-card:not(.featured) .product-image{height:235px}
.scene-band{grid-template-columns:1fr}.scene-image{min-height:290px}.scene-copy{padding:35px 27px}.scene-grid{grid-template-columns:1fr 1fr}.demo-visual{min-height:310px}.spec-panel{padding:24px}.service-grid{grid-template-columns:1fr}.service-card:nth-child(2){transform:none}.metric-grid{grid-template-columns:1fr 1fr;gap:16px}.proof-layout{grid-template-columns:1fr}.process{grid-template-columns:1fr 1fr;gap:28px}.process:before{display:none}.review-grid{grid-template-columns:1fr}.footer-top{grid-template-columns:1fr 1fr;gap:30px}
}
@media(max-width:520px){
.container{width:calc(100% - 28px)}.logo span{font-size:15px}.logo-mark{width:33px;height:33px}.utility-left{font-size:11px;gap:8px}.utility-left a:last-child{display:none}
.slides,.slide{min-height:610px;height:610px}.slide-content{padding-top:0}.slide-content h1{font-size:39px}.slide-content p{font-size:14px;margin-bottom:24px}.hero-actions{display:grid;grid-template-columns:1fr}.hero-actions .btn{width:100%}.slider-control{bottom:26px}.dots{bottom:42px;left:12px}
.glass-grid{grid-template-columns:1fr}.glass-card{min-height:0;padding:23px}.scene-grid{grid-template-columns:1fr}.scene-tile{height:160px}.scene-list{grid-template-columns:1fr}.metric-grid{grid-template-columns:1fr 1fr}.metric{padding:8px 12px}.metric strong{font-size:30px}.process{grid-template-columns:1fr}.form-row{grid-template-columns:1fr}.footer-top{grid-template-columns:1fr}.footer-bottom{display:block}.footer-bottom span{display:block;margin-top:9px}
}