/* roulang page: index */
:root{
      --bg:#071321;--bg-deep:#040b14;--surface:#0d1e31;--surface-2:#112940;
      --line:rgba(160,211,238,.16);--text:#f1f7fb;--muted:#9db1c2;
      --cyan:#48d9e8;--green:#7ce5a4;--orange:#ffb36b;--purple:#9b9cff;
      --shadow:0 18px 55px rgba(0,0,0,.28);--radius:18px;--container:1240px;
    }
    *{box-sizing:border-box;margin:0;padding:0}
    html{scroll-behavior:smooth}
    body{font-family:"PingFang SC","Microsoft YaHei",Arial,sans-serif;background:var(--bg);color:var(--text);line-height:1.7;font-size:15px;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} .container{width:min(var(--container),calc(100% - 48px));margin:auto}
    .topbar{height:46px;border-bottom:1px solid var(--line);background:rgba(4,11,20,.76)}
    .topbar .container,.navrow .container{display:flex;align-items:center;justify-content:space-between;height:100%}
    .topmeta{display:flex;gap:24px;color:var(--muted);font-size:13px}.topmeta b{color:var(--green);font-weight:500}
    header{position:sticky;top:0;z-index:20;background:rgba(5,15,27,.87);backdrop-filter:blur(18px);border-bottom:1px solid var(--line)}
    .navrow{height:78px}.brand{display:flex;align-items:center;gap:11px;font-weight:700;font-size:20px;letter-spacing:.02em}.brand-mark{width:34px;height:34px;border-radius:10px;background:linear-gradient(145deg,var(--cyan),#268bbd);position:relative;box-shadow:0 0 22px rgba(72,217,232,.35)}.brand-mark:after{content:"";position:absolute;width:12px;height:18px;background:#071321;clip-path:polygon(52% 0,100% 0,62% 43%,91% 43%,26% 100%,40% 55%,8% 55%);left:11px;top:8px}
    nav{display:flex;align-items:center;gap:28px;color:var(--muted);font-size:14px}nav a{height:78px;display:flex;align-items:center;border-bottom:2px solid transparent;transition:.25s}nav a:hover,nav a.active{color:var(--text);border-color:var(--cyan)}
    .nav-actions{display:flex;align-items:center;gap:18px}.phone{color:var(--muted);font-size:13px}.menu-btn{display:none;background:none;color:var(--text);font-size:25px;min-width:44px;min-height:44px}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 21px;border-radius:10px;font-weight:600;transition:.25s;border:1px solid transparent;min-height:44px}.btn-primary{background:var(--cyan);color:#06202c;box-shadow:0 0 24px rgba(72,217,232,.25)}.btn-primary:hover{background:#86eff5;box-shadow:0 0 32px rgba(72,217,232,.48);transform:translateY(-2px)}.btn-primary:active{transform:translateY(0);box-shadow:none}.btn-outline{border-color:rgba(72,217,232,.5);color:var(--cyan);background:rgba(72,217,232,.04)}.btn-outline:hover{background:rgba(72,217,232,.13);border-color:var(--cyan)}.btn:focus-visible,input:focus-visible,textarea:focus-visible,summary:focus-visible{outline:3px solid rgba(255,179,107,.65);outline-offset:3px}
    .hero{min-height:680px;position:relative;display:flex;align-items:center;background-size:cover;background-position:center;overflow:hidden}.hero:before{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(4,12,23,.95) 7%,rgba(4,12,23,.77) 45%,rgba(4,12,23,.28)),linear-gradient(0deg,var(--bg) 0,transparent 23%)}.hero .container{position:relative;z-index:1;display:grid;grid-template-columns:1.05fr .95fr;gap:70px;align-items:center}.eyebrow,.tag{display:inline-flex;align-items:center;gap:7px;color:var(--cyan);font-size:12px;letter-spacing:.1em;text-transform:uppercase}.eyebrow:before{content:"";width:24px;height:1px;background:var(--cyan)}h1{font-size:clamp(38px,5vw,68px);line-height:1.13;letter-spacing:-.04em;margin:20px 0}.hero p{max-width:620px;color:#c2d1dc;font-size:17px;line-height:1.9}.hero-buttons{display:flex;gap:13px;margin-top:32px}.hero-panel{padding:22px;background:rgba(10,28,45,.72);border:1px solid rgba(155,231,239,.25);border-radius:22px;backdrop-filter:blur(14px);box-shadow:var(--shadow);transform:rotate(1deg)}.panel-head{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line);padding-bottom:17px}.live{color:var(--green);font-size:12px}.live:before{content:"";display:inline-block;width:7px;height:7px;background:var(--green);border-radius:50%;margin-right:6px;box-shadow:0 0 10px var(--green)}.panel-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:18px 0}.mini{padding:13px;background:rgba(255,255,255,.055);border-radius:11px}.mini small{display:block;color:var(--muted);font-size:11px}.mini strong{font-size:20px}.chart{height:116px;border-radius:12px;background:linear-gradient(180deg,rgba(72,217,232,.16),transparent);position:relative;overflow:hidden}.chart svg{position:absolute;inset:15px;width:100%;height:90px}.slider-control{display:flex;align-items:center;gap:10px;margin-top:20px;color:var(--muted);font-size:12px}.dots{display:flex;gap:6px}.dots i{width:20px;height:4px;border-radius:3px;background:rgba(255,255,255,.25)}.dots i.on{background:var(--cyan)}
    section{padding:108px 0;position:relative}.section-alt{background:#091a2b}.section-dark{background:var(--bg-deep)}.section-head{display:flex;justify-content:space-between;align-items:end;gap:30px;margin-bottom:48px}.section-head h2{font-size:clamp(28px,3vw,42px);line-height:1.2;letter-spacing:-.03em}.section-head p{max-width:560px;color:var(--muted);line-height:1.8}.label{color:var(--orange);font-size:12px;letter-spacing:.12em;display:block;margin-bottom:12px}
    .intro-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:70px;align-items:center}.visual-card{position:relative;border:1px solid var(--line);border-radius:22px;overflow:hidden;box-shadow:var(--shadow);background:var(--surface)}.visual-card img{aspect-ratio:1.35/1}.visual-card .float-note{position:absolute;right:18px;bottom:18px;padding:13px 16px;background:rgba(5,15,27,.83);border:1px solid var(--line);border-radius:12px;font-size:13px}.intro-copy h2{font-size:38px;line-height:1.3;margin-bottom:18px}.intro-copy p{color:var(--muted);font-size:16px}.pills{display:flex;flex-wrap:wrap;gap:9px;margin:26px 0}.pill{padding:7px 12px;border:1px solid var(--line);border-radius:20px;color:#c8e5ec;background:rgba(72,217,232,.05);font-size:13px}.specs{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:30px}.specs div{border-left:2px solid var(--cyan);padding-left:12px}.specs b{display:block;font-size:18px}.specs span{color:var(--muted);font-size:12px}
    .feature-layout{display:grid;grid-template-columns:270px 1fr;gap:28px}.feature-tabs{display:flex;flex-direction:column;gap:8px}.feature-tabs button{text-align:left;color:var(--muted);background:transparent;padding:16px 18px;border-radius:10px;border-left:2px solid transparent}.feature-tabs button:hover,.feature-tabs button.active{color:var(--text);background:rgba(72,217,232,.08);border-color:var(--cyan)}.feature-content{display:grid;grid-template-columns:1.1fr .9fr;gap:22px;background:rgba(255,255,255,.035);border:1px solid var(--line);padding:34px;border-radius:18px}.feature-content h3{font-size:28px;margin-bottom:10px}.feature-content p{color:var(--muted);margin-bottom:22px}.field-list{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}.field-list li{list-style:none;color:#c9dbe5;padding:11px 13px;background:rgba(255,255,255,.045);border-radius:8px}.field-list li:before{content:"✓";color:var(--green);margin-right:8px}.module-graphic{min-height:230px;border-radius:14px;padding:18px;background:linear-gradient(145deg,#12344b,#0a1b2d);border:1px solid rgba(72,217,232,.2)}.module-row{display:flex;justify-content:space-between;padding:12px 0;border-bottom:1px solid var(--line);font-size:13px}.module-row span:last-child{color:var(--green)}
    .adv-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.adv{padding:25px;border:1px solid var(--line);background:rgba(255,255,255,.035);border-radius:14px;transition:.25s}.adv:hover{transform:translateY(-5px);border-color:rgba(72,217,232,.55);background:rgba(72,217,232,.07)}.adv-num{color:var(--cyan);font-size:13px}.adv h3{font-size:19px;margin:18px 0 8px}.adv p,.scene p,.quote p,.story p,.news p{color:var(--muted);font-size:14px}
    .scene-grid{display:grid;grid-template-columns:1.35fr .65fr;gap:16px}.scene-main{min-height:390px;background:linear-gradient(0deg,rgba(5,15,27,.9),transparent),url('/assets/images/850ce31288a7b262.webp') center/cover;border-radius:20px;padding:32px;display:flex;align-items:end;border:1px solid var(--line)}.scene-main h3{font-size:29px}.scene-side{display:grid;gap:16px}.scene{padding:25px;background:var(--surface);border:1px solid var(--line);border-radius:16px}.scene h3{margin:7px 0}
    .demo{background:#06111f}.demo-stage{display:grid;grid-template-columns:1fr 1fr;gap:28px;align-items:center}.demo-screen{border:1px solid rgba(72,217,232,.24);border-radius:20px;background:#0e2438;padding:18px;box-shadow:0 0 40px rgba(20,170,200,.12)}.demo-screen img{aspect-ratio:1.7/1;border-radius:11px}.demo-info h2{font-size:34px;margin:13px 0}.demo-info p{color:var(--muted)}.checklist{margin:24px 0;display:grid;gap:12px}.checklist li{list-style:none}.checklist li:before{content:"●";color:var(--green);font-size:10px;margin-right:12px}
    .product-layout{display:grid;grid-template-columns:1.3fr .7fr;gap:16px}.product{border:1px solid var(--line);background:var(--surface);border-radius:18px;overflow:hidden}.product.featured{grid-row:span 2}.product img{aspect-ratio:1.8/1}.product.featured img{aspect-ratio:1.3/1}.product-body{padding:22px}.product h3{font-size:21px;margin:5px 0 8px}.product small{color:var(--cyan)}
    .case{background:linear-gradient(120deg,#07101d,#102b3e);overflow:hidden}.case-grid{display:grid;grid-template-columns:1fr 1fr;gap:55px;align-items:center}.case h2{font-size:38px;line-height:1.3;margin:12px 0}.case p{color:#adc1ce}.case-board{padding:28px;border:1px solid rgba(124,229,164,.28);background:rgba(124,229,164,.05);border-radius:20px}.case-board img{aspect-ratio:1.35/1;border-radius:12px;margin-bottom:18px}.case-points{display:flex;gap:10px;flex-wrap:wrap}.case-points span{padding:8px 12px;border-radius:8px;background:rgba(255,255,255,.07);font-size:13px;color:#d9f4e1}
    .plans{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.plan{padding:28px;border:1px solid var(--line);border-radius:16px;background:rgba(255,255,255,.035);position:relative}.plan.recommend{border-color:var(--cyan);background:linear-gradient(150deg,rgba(72,217,232,.12),rgba(255,255,255,.035))}.recommend em{position:absolute;right:18px;top:18px;color:var(--orange);font-size:12px;font-style:normal}.plan h3{font-size:22px}.plan .for{color:var(--cyan);font-size:13px;margin:9px 0 18px}.plan ul{display:grid;gap:11px;margin:20px 0 26px}.plan li{list-style:none;color:#c1d0da}.plan li:before{content:"—";color:var(--green);margin-right:8px}
    .quotes{display:grid;grid-template-columns:1.2fr .8fr .8fr;gap:15px}.quote{padding:28px;background:rgba(255,255,255,.05);border:1px solid var(--line);border-radius:16px}.quote.big{background:linear-gradient(145deg,rgba(72,217,232,.13),rgba(255,255,255,.04))}.quote p{font-size:17px;color:#dbe8ef;line-height:1.8;margin-bottom:25px}.author{font-size:13px;color:var(--muted)}.author b{display:block;color:var(--text);font-size:14px}
    .story-layout{display:grid;grid-template-columns:.8fr 1.2fr;gap:60px}.story-layout h2{font-size:36px;line-height:1.35}.story-steps{display:grid;gap:16px}.story-step{display:grid;grid-template-columns:70px 1fr;gap:18px;padding:18px 0;border-bottom:1px solid var(--line)}.story-step strong{font-size:24px;color:var(--cyan)}.story-step h3{margin-bottom:4px}
    .stats{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.stat{padding:28px 18px;border-right:1px solid var(--line)}.stat:last-child{border:0}.stat strong{display:block;font-size:32px;color:var(--cyan)}.stat span{color:var(--muted);font-size:13px}
    .news-layout{display:grid;grid-template-columns:1.25fr .75fr;gap:16px}.news-main,.news-item{border:1px solid var(--line);border-radius:16px;overflow:hidden;background:var(--surface)}.news-main{display:grid;grid-template-columns:1fr 1fr}.news-main img{height:100%}.news-body{padding:27px}.news-body h3{font-size:23px;margin:12px 0}.news-item{display:flex;gap:17px;padding:17px}.news-item .date{color:var(--cyan);font-size:12px;min-width:75px}.news-item h3{font-size:16px}.news-item p{margin-top:3px;font-size:13px}
    .faq{max-width:900px;margin:auto}.faq details{border-bottom:1px solid var(--line);padding:21px 0}.faq summary{cursor:pointer;list-style:none;font-size:17px;font-weight:600;display:flex;justify-content:space-between;gap:20px}.faq summary::-webkit-details-marker{display:none}.faq summary:after{content:"+";color:var(--cyan);font-size:22px}.faq details[open] summary:after{content:"−"}.faq details p{color:var(--muted);padding:15px 35px 0 0;max-width:800px}
    .cta-section{padding:95px 0;background:radial-gradient(circle at 82% 30%,rgba(72,217,232,.2),transparent 34%),#0b2335}.cta-grid{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center}.cta-grid h2{font-size:42px;line-height:1.3}.cta-grid p{color:#bfd2dc;margin-top:15px}.form{display:grid;grid-template-columns:1fr 1fr;gap:13px}.form input,.form textarea{width:100%;border:1px solid rgba(174,220,234,.2);background:rgba(4,14,24,.62);border-radius:9px;padding:13px 14px;color:var(--text);min-height:48px}.form textarea{grid-column:span 2;min-height:90px;resize:vertical}.form .full{grid-column:span 2}.form input::placeholder,.form textarea::placeholder{color:#7890a0}.form-note{font-size:12px;color:var(--muted);margin-top:12px}.form-status{font-size:13px;color:var(--green);display:none;margin-top:10px}
    footer{background:#030a12;padding:58px 0 25px;border-top:1px solid var(--line)}.footer-grid{display:grid;grid-template-columns:1.3fr .7fr .8fr 1fr;gap:40px}.footer-brand p{color:var(--muted);margin-top:16px;max-width:300px;font-size:13px}.footer-col h3{font-size:14px;margin-bottom:17px}.footer-col a,.footer-col p{display:block;color:var(--muted);font-size:13px;margin:9px 0}.footer-col a:hover{color:var(--cyan)}.copyright{border-top:1px solid var(--line);margin-top:38px;padding-top:20px;color:#627785;font-size:12px;display:flex;justify-content:space-between;gap:20px}
    @media(max-width:1024px){nav{gap:15px}.phone{display:none}.hero .container{gap:35px}.feature-layout{grid-template-columns:210px 1fr}.intro-grid,.case-grid,.demo-stage{gap:35px}.footer-grid{grid-template-columns:repeat(2,1fr)}}
    @media(max-width:768px){.container{width:min(100% - 32px,var(--container))}.topbar{display:none}.navrow{height:68px}.navrow .container{position:relative}nav{display:none;position:absolute;top:68px;left:0;right:0;background:#081a2a;border:1px solid var(--line);padding:10px 16px;flex-direction:column;align-items:stretch;box-shadow:var(--shadow)}nav.open{display:flex}nav a{height:48px;border:0}.nav-actions .btn{display:none}.menu-btn{display:block}.hero{min-height:680px;padding:80px 0 90px}.hero .container,.intro-grid,.feature-content,.demo-stage,.case-grid,.story-layout,.cta-grid,.news-layout{grid-template-columns:1fr}.hero-panel{margin-top:10px;transform:none}.section-head{display:block;margin-bottom:30px}.section-head p{margin-top:13px}.feature-layout{grid-template-columns:1fr}.feature-tabs{display:flex;flex-direction:row;overflow:auto;padding-bottom:5px}.feature-tabs button{min-width:145px;border-left:0;border-bottom:2px solid transparent}.feature-tabs button.active{border-color:var(--cyan)}.adv-grid{grid-template-columns:repeat(2,1fr)}.scene-grid,.product-layout{grid-template-columns:1fr}.scene-main{min-height:300px}.product.featured{grid-row:auto}.product.featured img{aspect-ratio:1.8/1}.plans{grid-template-columns:1fr}.quotes{grid-template-columns:1fr}.stats{grid-template-columns:repeat(2,1fr)}.stat:nth-child(2){border-right:0}.stat:nth-child(-n+2){border-bottom:1px solid var(--line)}.news-main{grid-template-columns:1fr}.news-main img{height:220px}.cta-grid h2{font-size:34px}}
    @media(max-width:520px){h1{font-size:39px}.hero p{font-size:15px}.hero-buttons{flex-direction:column;align-items:stretch}.hero-buttons .btn{text-align:center}.intro-copy h2,.case h2,.demo-info h2{font-size:29px}.adv-grid{grid-template-columns:1fr}.field-list{grid-template-columns:1fr}.form{grid-template-columns:1fr}.form textarea,.form .full{grid-column:auto}.footer-grid{grid-template-columns:1fr;gap:26px}.copyright{display:block}.copyright span{display:block;margin-top:8px}.stats strong{font-size:26px}}
    @media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important;animation:none!important}}