/* roulang page: index */
:root{
 --bg:#06101f;--bg2:#0a1830;--panel:rgba(15,31,57,.72);--panel2:rgba(20,42,75,.58);
 --line:rgba(145,190,255,.16);--line2:rgba(92,166,255,.38);--text:#edf5ff;--muted:#9aacc7;
 --blue:#4d9dff;--cyan:#4de1d0;--violet:#947cff;--amber:#e9b86b;
 --radius:18px;--shadow:0 20px 60px rgba(0,0,0,.32);--ease:220ms ease;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:"PingFang SC","Microsoft YaHei",system-ui,sans-serif;background:var(--bg);color:var(--text);line-height:1.75;overflow-x:hidden}
body:before{content:"";position:fixed;inset:0;z-index:-2;background:
 radial-gradient(circle at 14% 10%,rgba(50,119,255,.16),transparent 32%),
 radial-gradient(circle at 86% 22%,rgba(116,75,224,.13),transparent 28%),
 linear-gradient(rgba(89,145,220,.045) 1px,transparent 1px),
 linear-gradient(90deg,rgba(89,145,220,.045) 1px,transparent 1px);background-size:auto,auto,42px 42px,42px 42px}
body:after{content:"";position:fixed;inset:0;pointer-events:none;z-index:-1;background:linear-gradient(115deg,transparent 35%,rgba(77,157,255,.025),transparent 65%)}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit}
button{cursor:pointer;border:0}
.container{width:min(1180px,calc(100% - 40px));margin:auto}
.topbar{position:sticky;top:0;z-index:20;height:76px;border-bottom:1px solid var(--line);background:rgba(5,15,30,.82);backdrop-filter:blur(18px)}
.nav{height:100%;display:flex;align-items:center;gap:28px}
.logo{display:flex;align-items:center;gap:10px;font-size:17px;font-weight:800;white-space:nowrap;letter-spacing:.2px}
.logo-mark{width:32px;height:32px;border:1px solid var(--line2);border-radius:10px;display:grid;place-items:center;color:var(--cyan);box-shadow:0 0 20px rgba(77,225,208,.18)}
.menu{display:flex;align-items:center;gap:5px;margin-left:20px}
.menu a{color:var(--muted);padding:9px 13px;border-radius:9px;font-size:14px;transition:var(--ease)}
.menu a:hover,.menu a:focus,.menu a.active{color:var(--text);background:rgba(77,157,255,.12);outline:none}
.menu a.active{box-shadow:inset 0 -2px var(--blue)}
.nav-right{margin-left:auto;display:flex;align-items:center;gap:14px}
.status{display:flex;align-items:center;gap:7px;font-size:12px;color:var(--muted)}
.dot{width:7px;height:7px;background:var(--cyan);border-radius:50%;box-shadow:0 0 11px var(--cyan)}
.icon-btn{width:38px;height:38px;border:1px solid var(--line);border-radius:10px;background:transparent;color:var(--muted);transition:var(--ease)}
.icon-btn:hover,.icon-btn:focus{color:var(--text);border-color:var(--line2);background:var(--panel);outline:3px solid rgba(77,157,255,.16)}
.primary,.secondary{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:11px;padding:12px 18px;font-weight:700;font-size:14px;transition:var(--ease)}
.primary{color:#031321;background:linear-gradient(135deg,#67b2ff,#54e5d4);box-shadow:0 8px 26px rgba(77,190,255,.23)}
.primary:hover{transform:translateY(-2px);box-shadow:0 12px 32px rgba(77,190,255,.4)}
.primary:active,.secondary:active{transform:scale(.98)}
.primary:focus,.secondary:focus{outline:3px solid rgba(77,225,208,.3);outline-offset:3px}
.secondary{border:1px solid var(--line2);color:var(--text);background:rgba(15,31,57,.45)}
.secondary:hover{border-color:var(--cyan);background:rgba(77,225,208,.08)}
.mobile-toggle{display:none}
.hero{padding:82px 0 44px;position:relative}
.hero-grid{display:grid;grid-template-columns:1.18fr .82fr;gap:54px;align-items:center}
.eyebrow,.section-kicker{color:var(--cyan);font-size:12px;font-weight:800;letter-spacing:1.6px;text-transform:uppercase}
h1{font-size:clamp(38px,5.2vw,68px);line-height:1.14;letter-spacing:-2px;margin:16px 0 22px;max-width:720px}
.hero-copy{font-size:17px;color:#b5c4d9;max-width:670px}
.hero-actions{display:flex;gap:12px;align-items:center;margin-top:30px;flex-wrap:wrap}
.hero-note{font-size:12px;color:var(--muted);margin-top:15px}
.signal-panel{border:1px solid var(--line2);border-radius:24px;background:linear-gradient(145deg,rgba(22,49,88,.8),rgba(10,23,45,.72));padding:25px;box-shadow:var(--shadow);position:relative;overflow:hidden}
.signal-panel:before{content:"";position:absolute;right:-50px;top:-55px;width:180px;height:180px;border-radius:50%;border:1px solid rgba(77,225,208,.23);box-shadow:0 0 0 22px rgba(77,225,208,.03),0 0 0 44px rgba(77,225,208,.025)}
.panel-head{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line);padding-bottom:17px;margin-bottom:19px}
.panel-title{font-weight:800}.badge{display:inline-flex;align-items:center;gap:6px;border:1px solid rgba(77,225,208,.35);background:rgba(77,225,208,.08);color:var(--cyan);font-size:11px;padding:4px 9px;border-radius:20px}
.signal-row{display:flex;justify-content:space-between;align-items:center;padding:13px 0;border-bottom:1px solid rgba(145,190,255,.09);font-size:13px}
.signal-row:last-child{border:0}.signal-row span{color:var(--muted)}.signal-value{font-family:ui-monospace,monospace;color:var(--text)}
.section{padding:64px 0}
.section-head{display:flex;justify-content:space-between;align-items:end;gap:24px;margin-bottom:26px}
.section-head h2{font-size:30px;line-height:1.25;margin-top:8px;letter-spacing:-.7px}
.section-head p{color:var(--muted);max-width:570px;font-size:14px}
.metrics{display:grid;grid-template-columns:1.35fr 1fr 1fr 1fr;gap:12px}
.metric{padding:20px 22px;background:var(--panel);border:1px solid var(--line);border-radius:16px;min-height:124px;position:relative;overflow:hidden}
.metric:first-child{border-color:var(--line2);background:linear-gradient(120deg,rgba(32,76,130,.7),var(--panel))}
.metric label{display:block;color:var(--muted);font-size:12px}.metric strong{display:block;font-size:28px;margin:6px 0 2px}.metric small{color:#8297b5;font-size:12px}
.mini-line{height:3px;background:rgba(77,157,255,.15);margin-top:13px;border-radius:3px}.mini-line i{display:block;width:74%;height:100%;background:var(--blue);border-radius:3px}
.news-layout{display:grid;grid-template-columns:1fr 320px;gap:18px}
.news-list,.side-card,.service-card,.compare,.faq-wrap,.form-panel,.about-panel{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius)}
.news-list{padding:8px 25px}
.news-item{display:grid;grid-template-columns:80px 1fr auto;gap:18px;align-items:center;padding:19px 0;border-bottom:1px solid var(--line)}
.news-item:last-child{border:0}.news-index{font-family:ui-monospace,monospace;color:var(--blue);font-size:12px}.news-item h3{font-size:15px;margin-bottom:3px}.news-item p{color:var(--muted);font-size:13px}.news-item time{font-size:12px;color:#7085a2;white-space:nowrap}
.side-card{padding:24px}.side-card h3{font-size:18px;margin:10px 0}.side-card p{font-size:13px;color:var(--muted)}.side-links{margin-top:17px;display:grid;gap:9px}.side-links a{padding:10px 12px;background:rgba(77,157,255,.06);border:1px solid transparent;border-radius:10px;color:#c4d4e9;font-size:13px}.side-links a:hover{border-color:var(--line2);color:var(--text)}
.matrix{display:grid;grid-template-columns:1.25fr .75fr;grid-template-rows:1fr 1fr;gap:16px}
.service-card{padding:26px;transition:var(--ease);position:relative;overflow:hidden}.service-card:hover{transform:translateY(-4px);border-color:var(--line2);box-shadow:0 15px 38px rgba(0,0,0,.2)}
.service-card.large{grid-row:span 2;background:linear-gradient(150deg,rgba(25,59,105,.75),var(--panel))}
.service-card h3{font-size:23px;margin:16px 0 8px}.service-card p{color:var(--muted);font-size:14px;max-width:460px}.card-foot{display:flex;justify-content:space-between;align-items:center;margin-top:28px}.arrow{font-size:22px;color:var(--cyan)}
.compare{padding:28px;background:linear-gradient(115deg,rgba(15,33,61,.82),rgba(11,24,45,.66))}
.compare-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:22px}.compare-box{padding:22px;border-radius:14px;border:1px solid var(--line);background:rgba(5,15,30,.35)}.compare-box.good{border-color:rgba(77,225,208,.35)}.compare-box h3{font-size:16px;margin-bottom:14px}.compare-box ul{list-style:none;display:grid;gap:11px;color:var(--muted);font-size:13px}.compare-box li:before{content:"—";color:var(--cyan);margin-right:9px}
.app-strip{display:grid;grid-template-columns:1fr 1fr;gap:18px;align-items:stretch}.device-card{padding:28px;border-radius:22px;border:1px solid var(--line);background:linear-gradient(135deg,rgba(24,49,85,.72),rgba(10,23,44,.78));min-height:210px}.device-card h2{font-size:27px;margin:12px 0}.device-card p{color:var(--muted);font-size:14px;max-width:490px}.device-points{display:flex;gap:9px;flex-wrap:wrap;margin-top:20px}.device-points span{padding:7px 10px;border-radius:8px;background:rgba(77,157,255,.1);color:#bcd2ed;font-size:12px}
.faq-wrap{display:grid;grid-template-columns:275px 1fr;gap:30px;padding:28px}.faq-intro p{color:var(--muted);font-size:14px;margin-top:12px}.faq-list{display:grid;gap:9px}.faq-item{border:1px solid var(--line);border-radius:12px;background:rgba(5,15,30,.28);overflow:hidden}.faq-item summary{list-style:none;padding:16px 18px;cursor:pointer;font-weight:700;font-size:14px;display:flex;justify-content:space-between}.faq-item summary::-webkit-details-marker{display:none}.faq-item summary:after{content:"+";color:var(--cyan);font-size:20px;line-height:1}.faq-item[open]{border-color:var(--line2)}.faq-item[open] summary:after{content:"−"}.faq-answer{padding:0 18px 18px;color:var(--muted);font-size:13px}
.form-panel{display:grid;grid-template-columns:.75fr 1.25fr;gap:35px;padding:30px;background:linear-gradient(120deg,rgba(23,49,87,.76),rgba(11,25,48,.75))}
.form-intro h2{font-size:29px;margin:10px 0}.form-intro p{color:var(--muted);font-size:14px}.form-status{margin-top:22px;color:var(--cyan);font-size:12px}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:15px}.field{display:grid;gap:7px}.field.full{grid-column:1/-1}.field label{font-size:12px;color:#b9c9dd}.field input,.field select,.field textarea{width:100%;background:rgba(3,12,26,.55);border:1px solid var(--line);border-radius:10px;color:var(--text);padding:11px 13px;min-height:46px;outline:none}.field textarea{resize:vertical;min-height:100px}.field input:hover,.field select:hover,.field textarea:hover,.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--blue);box-shadow:0 0 0 3px rgba(77,157,255,.12)}.privacy{font-size:11px;color:#788ca8;margin-top:12px}.about-panel{padding:27px;display:flex;justify-content:space-between;gap:30px;align-items:center}.about-panel p{color:var(--muted);font-size:14px;max-width:700px}
footer{border-top:1px solid var(--line);margin-top:45px;padding:42px 0 24px;background:rgba(3,11,24,.55)}.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:35px}.footer-brand p{color:var(--muted);font-size:13px;max-width:300px;margin-top:13px}.footer-col h3{font-size:13px;margin-bottom:13px}.footer-col a{display:block;color:var(--muted);font-size:13px;margin:7px 0}.footer-col a:hover{color:var(--cyan)}.footer-bottom{border-top:1px solid var(--line);margin-top:32px;padding-top:18px;color:#6e829e;font-size:11px;display:flex;justify-content:space-between;gap:15px}
@media(max-width:992px){.hero-grid{gap:28px}.metrics{grid-template-columns:1fr 1fr}.news-layout{grid-template-columns:1fr}.side-card{display:none}.footer-grid{grid-template-columns:1fr 1fr}}
@media(max-width:768px){.container{width:min(100% - 28px,620px)}.topbar{height:66px}.nav{gap:12px}.logo{font-size:14px}.logo-mark{width:29px;height:29px}.menu{display:none;position:absolute;top:66px;left:14px;right:14px;padding:12px;background:#0b1b33;border:1px solid var(--line2);border-radius:14px;box-shadow:var(--shadow);flex-direction:column;align-items:stretch}.menu.open{display:flex}.menu a{padding:12px}.nav-right .primary{display:none}.mobile-toggle{display:block;margin-left:auto}.hero{padding:55px 0 30px}.hero-grid{grid-template-columns:1fr}.hero-copy{font-size:15px}h1{font-size:42px;letter-spacing:-1.5px}.section{padding:46px 0}.section-head{display:block}.section-head h2{font-size:26px}.section-head p{margin-top:10px}.matrix,.app-strip,.faq-wrap,.form-panel{grid-template-columns:1fr}.service-card.large{grid-row:auto}.compare-grid{grid-template-columns:1fr}.faq-wrap{padding:20px}.about-panel{display:block}.about-panel .secondary{margin-top:18px}.footer-grid{grid-template-columns:1fr 1fr}.footer-brand{grid-column:1/-1}}
@media(max-width:576px){.container{width:calc(100% - 24px)}.status{display:none}.metrics{display:flex;overflow:auto;padding-bottom:5px}.metric{min-width:190px}.news-list{padding:5px 16px}.news-item{grid-template-columns:42px 1fr;gap:10px}.news-item time{grid-column:2}.form-grid{grid-template-columns:1fr}.field.full{grid-column:auto}.footer-grid{grid-template-columns:1fr}.footer-bottom{display:block}.footer-bottom span{display:block;margin-top:7px}.hero-actions a{width:100%}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}

/* roulang page: category2 */
:root{
 --bg:#06101f;--bg2:#0a1830;--panel:rgba(15,31,57,.72);--panel2:rgba(20,42,75,.58);
 --line:rgba(145,190,255,.16);--line2:rgba(92,166,255,.38);--text:#edf5ff;--muted:#9aacc7;
 --blue:#4d9dff;--cyan:#4de1d0;--violet:#947cff;--amber:#e9b86b;
 --radius:18px;--shadow:0 20px 60px rgba(0,0,0,.32);--ease:220ms ease;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:"PingFang SC","Microsoft YaHei",system-ui,sans-serif;background:var(--bg);color:var(--text);line-height:1.75;overflow-x:hidden}
body:before{content:"";position:fixed;inset:0;z-index:-2;background:radial-gradient(circle at 14% 10%,rgba(50,119,255,.16),transparent 32%),radial-gradient(circle at 86% 22%,rgba(116,75,224,.13),transparent 28%),linear-gradient(rgba(89,145,220,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(89,145,220,.045) 1px,transparent 1px);background-size:auto,auto,42px 42px,42px 42px}
body:after{content:"";position:fixed;inset:0;pointer-events:none;z-index:-1;background:linear-gradient(115deg,transparent 35%,rgba(77,157,255,.025),transparent 65%)}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit}
button{cursor:pointer;border:0}
.container{width:min(1180px,calc(100% - 40px));margin:auto}
.topbar{position:sticky;top:0;z-index:20;height:76px;border-bottom:1px solid var(--line);background:rgba(5,15,30,.82);backdrop-filter:blur(18px)}
.nav{height:100%;display:flex;align-items:center;gap:28px}
.logo{display:flex;align-items:center;gap:10px;font-size:17px;font-weight:800;white-space:nowrap;letter-spacing:.2px}
.logo-mark{width:32px;height:32px;border:1px solid var(--line2);border-radius:10px;display:grid;place-items:center;color:var(--cyan);box-shadow:0 0 20px rgba(77,225,208,.18)}
.menu{display:flex;align-items:center;gap:5px;margin-left:20px}
.menu a{color:var(--muted);padding:9px 13px;border-radius:9px;font-size:14px;transition:var(--ease)}
.menu a:hover,.menu a:focus,.menu a.active{color:var(--text);background:rgba(77,157,255,.12);outline:none}
.menu a.active{box-shadow:inset 0 -2px var(--blue)}
.nav-right{margin-left:auto;display:flex;align-items:center;gap:14px}
.status{display:flex;align-items:center;gap:7px;color:var(--muted);font-size:12px}
.status-dot{width:8px;height:8px;border-radius:50%;background:var(--cyan);box-shadow:0 0 12px var(--cyan)}
.icon-btn{width:38px;height:38px;border:1px solid var(--line);border-radius:10px;background:transparent;color:var(--muted);transition:var(--ease)}
.icon-btn:hover,.icon-btn:focus{color:var(--text);border-color:var(--line2);background:var(--panel);outline:3px solid rgba(77,157,255,.16)}
.mobile-toggle{display:none}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:45px;padding:0 18px;border-radius:11px;font-weight:700;font-size:14px;transition:var(--ease)}
.btn-primary{color:#031221;background:linear-gradient(135deg,#65b2ff,#4de1d0);box-shadow:0 0 24px rgba(77,157,255,.24)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 0 34px rgba(77,157,255,.42)}
.btn-primary:active{transform:scale(.98)}
.btn-secondary{border:1px solid var(--line2);color:var(--text);background:rgba(77,157,255,.08)}
.btn-secondary:hover{background:rgba(77,157,255,.18);border-color:var(--blue)}
.btn:focus{outline:3px solid rgba(77,225,208,.28);outline-offset:3px}
.eyebrow,.section-kicker{color:var(--cyan);font-size:12px;font-weight:800;letter-spacing:1.6px}
.page-hero{padding:72px 0 48px;border-bottom:1px solid var(--line)}
.hero-line{display:grid;grid-template-columns:130px 1fr auto;gap:34px;align-items:end}
.page-index{font:700 48px/1 ui-monospace,monospace;color:rgba(77,157,255,.7);border-right:1px solid var(--line);padding:12px 28px 12px 0}
h1,h2,h3,p{margin-top:0}
h1{font-size:clamp(34px,5vw,58px);line-height:1.14;letter-spacing:-1.8px;margin:12px 0 16px}
.lead{color:#b5c4d9;font-size:17px;max-width:690px}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap}
.content-layout{display:grid;grid-template-columns:220px 1fr;gap:34px;padding:64px 0}
.toc{position:sticky;top:100px;align-self:start;border:1px solid var(--line);background:rgba(15,31,57,.58);border-radius:16px;padding:18px}
.toc strong{display:block;font-size:13px;margin-bottom:12px;color:var(--cyan)}
.toc a{display:block;color:var(--muted);font-size:13px;padding:9px 10px;border-left:2px solid transparent;transition:var(--ease)}
.toc a:hover,.toc a:focus{color:var(--text);border-left-color:var(--blue);background:rgba(77,157,255,.08);outline:none}
.module{margin-bottom:42px}
.module-head{display:flex;align-items:center;gap:12px;margin-bottom:18px}
.module-head h2{font-size:27px;line-height:1.3;margin:0}
.num{font:700 13px ui-monospace,monospace;color:var(--cyan);padding:5px 8px;border:1px solid rgba(77,225,208,.3);border-radius:7px;background:rgba(77,225,208,.07)}
.panel{border:1px solid var(--line);border-radius:var(--radius);background:var(--panel);box-shadow:var(--shadow)}
.overview{padding:28px;display:grid;grid-template-columns:1.15fr .85fr;gap:28px}
.overview p,.step p,.feature p{color:var(--muted);font-size:14px}
.mini-list{display:grid;gap:10px}
.mini-row{display:flex;justify-content:space-between;gap:16px;padding:12px 14px;border:1px solid var(--line);border-radius:10px;background:rgba(4,14,29,.35);font-size:13px}
.mini-row span{color:var(--muted)}
.badge{display:inline-flex;align-items:center;gap:6px;border:1px solid rgba(77,225,208,.35);background:rgba(77,225,208,.08);color:var(--cyan);font-size:11px;padding:4px 9px;border-radius:20px}
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.step{padding:23px;border:1px solid var(--line);border-radius:16px;background:linear-gradient(145deg,rgba(24,49,85,.7),rgba(10,23,44,.68));transition:var(--ease)}
.step:hover{transform:translateY(-4px);border-color:var(--line2)}
.step-number{font:700 25px ui-monospace,monospace;color:var(--blue)}
.step h3{font-size:18px;margin:14px 0 7px}
.feature-list{display:grid;gap:10px}
.feature{display:grid;grid-template-columns:58px 1fr auto;align-items:center;gap:16px;padding:18px 20px;border:1px solid var(--line);border-radius:14px;background:rgba(15,31,57,.62);transition:var(--ease)}
.feature:hover{border-color:var(--line2);background:rgba(20,42,75,.7)}
.feature-code{font:700 14px ui-monospace,monospace;color:var(--violet)}
.feature h3{font-size:16px;margin:0 0 3px}
.feature p{margin:0}
.feature-arrow{font-size:21px;color:var(--cyan)}
.faq-list{display:grid;gap:9px}
.faq-item{border:1px solid var(--line);border-radius:12px;background:rgba(5,15,30,.28);overflow:hidden}
.faq-item summary{list-style:none;padding:16px 18px;cursor:pointer;font-weight:700;font-size:14px;display:flex;justify-content:space-between}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:after{content:"+";color:var(--cyan);font-size:20px;line-height:1}
.faq-item[open]{border-color:var(--line2)}
.faq-item[open] summary:after{content:"−"}
.faq-answer{padding:0 18px 18px;color:var(--muted);font-size:13px}
.cta{display:flex;align-items:center;justify-content:space-between;gap:28px;padding:30px;border:1px solid var(--line2);border-radius:22px;background:linear-gradient(120deg,rgba(24,59,105,.78),rgba(11,25,48,.78));box-shadow:0 18px 50px rgba(0,0,0,.2)}
.cta h2{font-size:27px;margin:9px 0}
.cta p{color:var(--muted);font-size:14px;margin:0}
footer{margin-top:40px;padding:46px 0 24px;border-top:1px solid var(--line);background:rgba(3,10,22,.72)}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:40px}
.footer-brand p{color:var(--muted);font-size:13px;max-width:360px;margin-top:15px}
.footer-col{display:flex;flex-direction:column;gap:8px}
.footer-col h3{font-size:14px;margin:0 0 9px}
.footer-col a{color:var(--muted);font-size:13px;transition:var(--ease)}
.footer-col a:hover{color:var(--cyan);transform:translateX(3px)}
.footer-bottom{display:flex;justify-content:space-between;gap:18px;margin-top:38px;padding-top:18px;border-top:1px solid var(--line);color:#6f829e;font-size:12px}
@media(max-width:992px){.hero-line{grid-template-columns:90px 1fr}.hero-actions{grid-column:2}.content-layout{grid-template-columns:180px 1fr}.overview{grid-template-columns:1fr}}
@media(max-width:768px){.container{width:min(100% - 28px,620px)}.topbar{height:68px}.nav{gap:12px}.menu{display:none;position:absolute;top:68px;left:14px;right:14px;margin:0;padding:10px;flex-direction:column;align-items:stretch;background:rgba(5,15,30,.98);border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow)}.menu.open{display:flex}.mobile-toggle{display:block}.nav-right{gap:8px}.status span{display:none}.page-hero{padding:52px 0 35px}.hero-line{grid-template-columns:1fr;gap:16px;align-items:start}.page-index{border:0;padding:0;font-size:38px}.hero-actions{grid-column:auto}.content-layout{display:block;padding:42px 0}.toc{position:static;display:flex;gap:4px;overflow-x:auto;margin-bottom:38px;padding:8px}.toc strong{display:none}.toc a{white-space:nowrap;border-left:0;border-bottom:2px solid transparent}.toc a:hover,.toc a:focus{border-left:0;border-bottom-color:var(--blue)}.steps{grid-template-columns:1fr}.feature{grid-template-columns:45px 1fr}.feature-arrow{display:none}.cta{display:block}.cta .btn{margin-top:22px}.footer-grid{grid-template-columns:1fr 1fr}.footer-brand{grid-column:1/-1}.footer-bottom{display:block}.footer-bottom span{display:block;margin-top:6px}}
@media(max-width:576px){h1{font-size:36px}.lead{font-size:15px}.hero-actions .btn{width:100%}.overview,.panel{padding:20px}.module-head h2{font-size:23px}.feature{padding:15px;gap:10px}.footer-grid{grid-template-columns:1fr}.footer-brand{grid-column:auto}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;transition:none!important}}

/* roulang page: category1 */
:root{
 --bg:#06101f;--bg2:#0a1830;--panel:rgba(15,31,57,.72);--panel2:rgba(20,42,75,.58);
 --line:rgba(145,190,255,.16);--line2:rgba(92,166,255,.38);--text:#edf5ff;--muted:#9aacc7;
 --blue:#4d9dff;--cyan:#4de1d0;--violet:#947cff;--amber:#e9b86b;
 --radius:18px;--shadow:0 20px 60px rgba(0,0,0,.32);--ease:220ms ease;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:"PingFang SC","Microsoft YaHei",system-ui,sans-serif;background:var(--bg);color:var(--text);line-height:1.75;overflow-x:hidden}
body:before{content:"";position:fixed;inset:0;z-index:-2;background:radial-gradient(circle at 14% 10%,rgba(50,119,255,.16),transparent 32%),radial-gradient(circle at 86% 22%,rgba(116,75,224,.13),transparent 28%),linear-gradient(rgba(89,145,220,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(89,145,220,.045) 1px,transparent 1px);background-size:auto,auto,42px 42px,42px 42px}
body:after{content:"";position:fixed;inset:0;pointer-events:none;z-index:-1;background:linear-gradient(115deg,transparent 35%,rgba(77,157,255,.025),transparent 65%)}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit}
button{cursor:pointer;border:0}
.container{width:min(1180px,calc(100% - 40px));margin:auto}
.topbar{position:sticky;top:0;z-index:20;height:76px;border-bottom:1px solid var(--line);background:rgba(5,15,30,.84);backdrop-filter:blur(18px)}
.nav{height:100%;display:flex;align-items:center;gap:28px}
.logo{display:flex;align-items:center;gap:10px;font-size:17px;font-weight:800;white-space:nowrap;letter-spacing:.2px}
.logo-mark{width:32px;height:32px;border:1px solid var(--line2);border-radius:10px;display:grid;place-items:center;color:var(--cyan);box-shadow:0 0 20px rgba(77,225,208,.18)}
.menu{display:flex;align-items:center;gap:5px;margin-left:20px}
.menu a{color:var(--muted);padding:9px 13px;border-radius:9px;font-size:14px;transition:var(--ease)}
.menu a:hover,.menu a:focus,.menu a.active{color:var(--text);background:rgba(77,157,255,.12);outline:none}
.menu a.active{box-shadow:inset 0 -2px var(--blue)}
.nav-right{margin-left:auto;display:flex;align-items:center;gap:14px}
.status{font-size:12px;color:var(--muted);display:flex;align-items:center;gap:7px}
.status-dot{width:7px;height:7px;border-radius:50%;background:var(--cyan);box-shadow:0 0 13px var(--cyan)}
.icon-btn{width:38px;height:38px;border:1px solid var(--line);border-radius:10px;background:transparent;color:var(--muted);transition:var(--ease)}
.icon-btn:hover,.icon-btn:focus{color:var(--text);border-color:var(--line2);background:var(--panel);outline:3px solid rgba(77,157,255,.16)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:11px;padding:11px 17px;font-weight:700;font-size:14px;transition:var(--ease);min-height:44px}
.btn-primary{color:#041326;background:var(--cyan);box-shadow:0 0 24px rgba(77,225,208,.2)}
.btn-primary:hover{background:#83f2e5;transform:translateY(-2px);box-shadow:0 0 32px rgba(77,225,208,.34)}
.btn-primary:active{transform:scale(.98)}
.btn-secondary{border:1px solid var(--line2);color:var(--text);background:rgba(77,157,255,.08)}
.btn-secondary:hover{background:rgba(77,157,255,.18);border-color:var(--blue)}
.btn:focus{outline:3px solid rgba(77,225,208,.3);outline-offset:2px}
.mobile-toggle{display:none}
.page-head{padding:74px 0 40px;border-bottom:1px solid var(--line)}
.head-grid{display:grid;grid-template-columns:1fr 360px;gap:50px;align-items:end}
.eyebrow,.section-kicker{color:var(--cyan);font-size:12px;font-weight:800;letter-spacing:1.6px}
h1{font-size:clamp(36px,5vw,62px);line-height:1.15;letter-spacing:-1.8px;margin:13px 0 18px}
.head-copy{max-width:700px;color:#b5c4d9;font-size:16px}
.head-note{padding:20px 22px;border:1px solid var(--line);background:var(--panel);border-radius:16px;box-shadow:var(--shadow)}
.head-note strong{display:block;font-size:17px;margin:8px 0}
.head-note p{font-size:13px;color:var(--muted)}
.badge{display:inline-flex;align-items:center;gap:6px;border:1px solid rgba(77,225,208,.35);background:rgba(77,225,208,.08);color:var(--cyan);font-size:11px;padding:4px 9px;border-radius:20px}
.section{padding:58px 0}
.section-head{display:flex;justify-content:space-between;align-items:end;gap:24px;margin-bottom:23px}
.section-head h2{font-size:29px;line-height:1.25;margin-top:8px;letter-spacing:-.7px}
.section-head p{color:var(--muted);max-width:570px;font-size:14px}
.filter-bar{display:grid;grid-template-columns:1.4fr .8fr .8fr auto;gap:11px;padding:16px;border:1px solid var(--line);background:var(--panel);border-radius:16px;margin-bottom:22px}
.field-control{min-height:44px;border:1px solid var(--line);border-radius:10px;background:rgba(3,12,26,.6);color:var(--text);padding:9px 12px;outline:none}
.field-control::placeholder{color:#6f83a0}
.field-control:focus{border-color:var(--blue);box-shadow:0 0 0 3px rgba(77,157,255,.14)}
.filter-btn{min-height:44px;border-radius:10px;padding:0 18px;background:rgba(77,157,255,.14);border:1px solid var(--line2);color:var(--text);font-weight:700;transition:var(--ease)}
.filter-btn:hover{background:var(--blue);color:#031225}
.index-layout{display:grid;grid-template-columns:minmax(0,1fr) 315px;gap:22px}
.news-list,.side-card,.faq-wrap,.form-panel{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius)}
.news-list{padding:7px 25px}
.news-item{display:grid;grid-template-columns:64px 1fr auto;gap:18px;align-items:center;padding:20px 0;border-bottom:1px solid var(--line);transition:var(--ease)}
.news-item:last-child{border:0}
.news-item:hover{padding-left:8px}
.item-no{font-family:ui-monospace,monospace;color:var(--blue);font-size:13px}
.news-item h3{font-size:16px;margin-bottom:4px}
.news-item p{color:var(--muted);font-size:13px}
.news-item time{font-size:12px;color:#7085a2;white-space:nowrap}
.item-meta{display:flex;gap:8px;flex-wrap:wrap;margin-top:7px}
.item-tag{font-size:11px;color:#a9bedb;border:1px solid var(--line);padding:2px 7px;border-radius:6px}
.item-arrow{color:var(--cyan);font-size:20px}
.side-card{padding:24px;position:sticky;top:98px}
.side-card h3{font-size:19px;margin:10px 0 8px}
.side-card p{font-size:13px;color:var(--muted)}
.signal-row{display:flex;justify-content:space-between;align-items:center;padding:13px 0;border-bottom:1px solid rgba(145,190,255,.09);font-size:13px}
.signal-row:last-child{border:0}
.signal-row span{color:var(--muted)}
.side-links{display:grid;gap:9px;margin-top:18px}
.side-links a{padding:10px 12px;background:rgba(77,157,255,.06);border:1px solid transparent;border-radius:10px;color:#c4d4e9;font-size:13px;transition:var(--ease)}
.side-links a:hover{border-color:var(--line2);color:var(--text);transform:translateX(3px)}
.pager{display:flex;justify-content:center;gap:8px;margin-top:24px}
.page-btn{width:38px;height:38px;border-radius:9px;border:1px solid var(--line);background:rgba(8,22,42,.65);color:var(--muted);transition:var(--ease)}
.page-btn:hover,.page-btn.active{color:var(--text);border-color:var(--line2);background:rgba(77,157,255,.18)}
.page-btn.disabled{opacity:.35;cursor:not-allowed}
.compare{padding:28px}
.compare-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:22px}
.device-card{padding:27px;border-radius:18px;border:1px solid var(--line);background:linear-gradient(135deg,rgba(24,49,85,.72),rgba(10,23,44,.78));min-height:190px}
.device-card h3{font-size:23px;margin:12px 0 8px}
.device-card p{color:var(--muted);font-size:14px}
.check-list{display:grid;gap:9px;margin-top:16px;list-style:none;color:#c9d7e9;font-size:13px}
.check-list li:before{content:"✓";color:var(--cyan);margin-right:9px}
.faq-wrap{display:grid;grid-template-columns:275px 1fr;gap:30px;padding:28px}
.faq-intro p{color:var(--muted);font-size:14px;margin-top:12px}
.faq-list{display:grid;gap:9px}
.faq-item{border:1px solid var(--line);border-radius:12px;background:rgba(5,15,30,.28);overflow:hidden}
.faq-item summary{list-style:none;padding:16px 18px;cursor:pointer;font-weight:700;font-size:14px;display:flex;justify-content:space-between}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:after{content:"+";color:var(--cyan);font-size:20px;line-height:1}
.faq-item[open]{border-color:var(--line2)}
.faq-item[open] summary:after{content:"−"}
.faq-answer{padding:0 18px 18px;color:var(--muted);font-size:13px}
.cta{padding:34px;border:1px solid var(--line2);border-radius:22px;background:linear-gradient(120deg,rgba(25,58,104,.72),rgba(10,23,45,.85));display:flex;justify-content:space-between;align-items:center;gap:25px}
.cta h2{font-size:27px;margin:8px 0}
.cta p{color:var(--muted);font-size:14px;max-width:630px}
footer{border-top:1px solid var(--line);padding:45px 0 22px;background:rgba(3,10,21,.65)}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:35px}
.footer-brand p{color:var(--muted);font-size:13px;max-width:330px;margin-top:15px}
.footer-col{display:grid;align-content:start;gap:8px}
.footer-col h3{font-size:13px;color:var(--text);margin-bottom:7px}
.footer-col a{font-size:13px;color:var(--muted);transition:var(--ease)}
.footer-col a:hover{color:var(--cyan)}
.footer-bottom{display:flex;justify-content:space-between;gap:20px;border-top:1px solid var(--line);margin-top:35px;padding-top:18px;color:#6f83a0;font-size:11px}
@media(max-width:992px){.head-grid{grid-template-columns:1fr 300px}.index-layout{grid-template-columns:1fr}.side-card{position:static}.filter-bar{grid-template-columns:1fr 1fr}.filter-btn{width:100%}}
@media(max-width:768px){.container{width:min(100% - 28px,620px)}.topbar{height:68px}.nav{gap:12px}.menu{display:none;position:absolute;left:14px;right:14px;top:76px;margin:0;padding:12px;flex-direction:column;align-items:stretch;background:rgba(5,15,30,.97);border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow)}.menu.open{display:flex}.mobile-toggle{display:block;margin-left:auto}.nav-right .status,.nav-right .btn{display:none}.page-head{padding:52px 0 30px}.head-grid{grid-template-columns:1fr;gap:25px}h1{font-size:42px}.section{padding:45px 0}.section-head{display:block}.section-head p{margin-top:10px}.filter-bar{grid-template-columns:1fr}.news-list{padding:5px 16px}.news-item{grid-template-columns:42px 1fr auto;gap:10px}.news-item time{display:none}.compare-grid,.faq-wrap{grid-template-columns:1fr}.faq-wrap{padding:20px}.cta{display:block;padding:26px}.cta .btn{margin-top:20px}.footer-grid{grid-template-columns:1fr 1fr}.footer-brand{grid-column:1/-1}.footer-bottom{display:block}.footer-bottom span{display:block;margin-top:6px}}
@media(max-width:576px){.logo{font-size:14px}.logo-mark{width:29px;height:29px}h1{font-size:35px}.head-copy{font-size:15px}.news-item h3{font-size:14px}.news-item p{font-size:12px}.item-arrow{font-size:17px}.footer-grid{grid-template-columns:1fr}.footer-brand{grid-column:auto}.footer-bottom{font-size:10px}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;transition:none!important}}