/* roulang page: index */
:root{
  --bg:#05070F;--bg2:#080C1A;--bg3:#0B1120;
  --blue:#3D6BFF;--cyan:#16E0C4;--amber:#FFB45C;
  --text:#E8EEF9;--muted:#93A0B8;
  --line:rgba(140,170,230,.16);
  --glass:rgba(255,255,255,.055);
  --line2:rgba(140,180,255,.16);
  --r:16px;
  --shadow:0 8px 28px rgba(61,107,255,.42);
}
*,*::before,*::after{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--text);font-family:"PingFang SC","HarmonyOS Sans","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;font-size:15px;line-height:1.75;-webkit-font-smoothing:antialiased}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
h1,h2,h3{font-weight:600;line-height:1.32;margin:0}
ul,ol{margin:0;padding:0;list-style:none}
input,button{font:inherit}
:focus-visible{outline:2px solid var(--cyan);outline-offset:2px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}

/* header */
.site-head{position:sticky;top:0;z-index:60;background:rgba(5,7,15,.74);backdrop-filter:blur(14px) saturate(120%);border-bottom:1px solid var(--line)}
.nav-bar{display:flex;align-items:center;height:72px;gap:16px}
.brand{display:flex;align-items:center;gap:12px;flex:none}
.brand-mark{width:48px;height:48px;border-radius:12px;display:grid;place-items:center;background:var(--glass);border:1px solid var(--line2);color:var(--cyan);font-size:20px;font-weight:600}
.brand-name{font-size:17px;font-weight:600;letter-spacing:.02em}
.nav-toggle{position:absolute;opacity:0;width:0;height:0;pointer-events:none}
.nav-burger{display:none;width:44px;height:44px;border-radius:12px;border:1px solid var(--line2);background:var(--glass);cursor:pointer;place-items:center;flex-direction:column;gap:4px}
.nav-burger span{display:block;width:18px;height:2px;border-radius:2px;background:var(--text)}
.nav-panel{display:flex;align-items:center;margin-left:auto;gap:8px}
.nav-list{display:flex;gap:2px}
.nav-list a{display:block;padding:8px 13px;border-radius:999px;font-size:14px;color:var(--muted);transition:color .2s,background .2s}
.nav-list a:hover,.nav-list a.active{color:var(--text);background:rgba(255,255,255,.06)}
.nav-actions{display:flex;align-items:center;gap:14px;margin-left:20px;flex:none}
.nav-link{font-size:14px;color:var(--muted);border-bottom:1px solid transparent;padding-bottom:2px;transition:.2s}
.nav-link:hover{color:var(--cyan);border-color:var(--cyan)}
.panel-cta{display:none}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:0 22px;border-radius:999px;font-size:14px;font-weight:600;border:1px solid transparent;cursor:pointer;transition:transform .2s,box-shadow .2s,filter .2s,border-color .2s,color .2s}
.btn-glow{background:linear-gradient(135deg,#3D6BFF,#16E0C4);color:#04101F;box-shadow:var(--shadow),inset 0 1px 0 rgba(255,255,255,.4)}
.btn-glow:hover{filter:brightness(1.08);transform:translateY(-1px);box-shadow:0 10px 36px rgba(61,107,255,.5)}
.btn-glow:active{transform:none;box-shadow:var(--shadow)}
.btn-ghost{background:rgba(255,255,255,.04);border-color:var(--line2);color:var(--text)}
.btn-ghost:hover{border-color:var(--cyan);color:var(--cyan)}

/* sections */
.sec{padding:88px 0;border-top:1px solid var(--line)}
.sec-head{display:flex;align-items:baseline;gap:16px;flex-wrap:wrap;margin-bottom:36px}
.kicker{font-size:12px;letter-spacing:.2em;color:var(--cyan);font-variant-numeric:tabular-nums}
.sec-head h2{font-size:26px}
.more{margin-left:auto;font-size:13px;color:var(--muted);border-bottom:1px solid var(--line);padding-bottom:2px;transition:.2s}
.more:hover{color:var(--cyan);border-color:var(--cyan)}

/* hero */
.hero{position:relative;overflow:hidden;padding:80px 0 64px}
.hero-bg{position:absolute;inset:0;z-index:0}
.hero-bg img{width:100%;height:100%;object-fit:cover;opacity:.3}
.hero-bg::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(5,7,15,.62),var(--bg) 82%)}
.hero .container{position:relative;z-index:1}
.hero-inner{display:grid;grid-template-columns:7fr 5fr;gap:32px;align-items:start}
.hero-tag{display:inline-block;font-size:12px;letter-spacing:.14em;color:var(--cyan);border:1px solid rgba(22,224,196,.4);background:rgba(22,224,196,.08);border-radius:6px;padding:3px 10px}
.hero h1{font-size:40px;line-height:1.22;margin:20px 0 14px;letter-spacing:.01em}
.hero h1 em{font-style:normal;background:linear-gradient(100deg,#16E0C4,#6FA8FF);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-sub{font-size:16px;color:var(--text);margin:0 0 14px;font-weight:400}
.hero-desc{font-size:15px;color:var(--muted);margin:0 0 28px;max-width:520px}
.hero-btns{display:flex;gap:12px;flex-wrap:wrap}
.hero-card{background:var(--glass);border:1px solid var(--line2);border-radius:var(--r);padding:18px;backdrop-filter:blur(14px) saturate(120%)}
.issue{display:flex;align-items:center;justify-content:space-between;font-size:12px;color:var(--muted);margin-bottom:12px}
.issue b{color:var(--cyan);font-weight:600;letter-spacing:.08em}
.card-figure{aspect-ratio:16/9;overflow:hidden;border-radius:12px;background:var(--bg3)}
.card-figure img{width:100%;height:100%;object-fit:cover}
.hero-card p{font-size:13px;color:var(--muted);margin:14px 0 0}
.nl-form{display:flex;gap:8px;margin-top:12px}
.field{flex:1;min-width:0;min-height:44px;padding:0 16px;color:var(--text);font-size:14px;background:rgba(255,255,255,.05);border:1px solid var(--line);border-radius:999px;transition:border-color .2s,box-shadow .2s}
.field::placeholder{color:#68748c}
.field:focus{outline:none;border-color:var(--cyan);box-shadow:0 0 0 3px rgba(22,224,196,.18)}
.stat-bar{display:grid;grid-template-columns:repeat(4,1fr);margin-top:60px;border-top:1px solid var(--line)}
.stat-bar li{padding:20px 24px 4px;border-right:1px solid var(--line)}
.stat-bar li:last-child{border-right:0}
.stat-num{display:block;font-size:32px;font-weight:700;color:var(--text);font-variant-numeric:tabular-nums;line-height:1.2}
.stat-label{font-size:12px;color:var(--muted)}

/* capability */
.cap-list{display:grid;grid-template-columns:repeat(4,1fr)}
.cap-item{padding:4px 24px 8px;border-left:1px solid var(--line)}
.cap-num{font-size:12px;letter-spacing:.16em;color:var(--cyan);font-variant-numeric:tabular-nums}
.cap-item h3{font-size:16px;margin:10px 0 8px}
.cap-item p{font-size:14px;color:var(--muted);margin:0 0 14px}
.tags{display:flex;flex-wrap:wrap;gap:6px}
.tag{font-size:12px;line-height:1.6;padding:2px 9px;border-radius:6px;border:1px solid var(--line);color:var(--muted);background:rgba(255,255,255,.03)}

/* scenes */
.scene{display:grid;grid-template-columns:1fr 1fr;gap:36px;align-items:center;padding:28px 0;border-bottom:1px solid var(--line)}
.scene:last-child{border-bottom:0}
.scene-fig{aspect-ratio:4/3;overflow:hidden;border-radius:var(--r);border:1px solid var(--line2)}
.scene-fig img{width:100%;height:100%;object-fit:cover;transition:transform .45s}
.scene:hover .scene-fig img{transform:scale(1.03)}
.scene:nth-child(even) .scene-fig{order:2}
.scene-txt h3{font-size:20px;margin-bottom:10px}
.scene-txt p{font-size:14px;color:var(--muted);margin:0 0 14px}
.mini-list{display:flex;flex-wrap:wrap;gap:16px;font-size:13px;color:var(--text)}
.mini-list li{position:relative;padding-left:12px}
.mini-list li::before{content:"";position:absolute;left:0;top:9px;width:4px;height:4px;border-radius:50%;background:var(--cyan)}

/* demo */
.demo-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.demo-card{background:var(--glass);border:1px solid var(--line2);border-radius:var(--r);overflow:hidden;backdrop-filter:blur(14px) saturate(120%);transition:transform .25s,border-color .25s}
.demo-card:hover{transform:translateY(-2px);border-color:rgba(22,224,196,.45)}
.window-bar{display:flex;gap:6px;padding:11px 14px;border-bottom:1px solid var(--line)}
.dot{width:8px;height:8px;border-radius:50%;background:rgba(140,170,230,.4);display:block}
.demo-card .card-figure{border-radius:0}
.demo-body{padding:16px 18px 20px}
.demo-body h3{font-size:16px;margin-bottom:8px}
.demo-body p{font-size:13px;color:var(--muted);margin:0 0 12px}

/* poster grid */
.poster-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.card{background:var(--glass);border:1px solid var(--line2);border-radius:var(--r);overflow:hidden;backdrop-filter:blur(14px) saturate(120%);transition:transform .25s,border-color .25s}
.card:hover{transform:translateY(-2px);border-color:rgba(22,224,196,.45)}
.card-img{aspect-ratio:2/3;overflow:hidden;background:var(--bg3)}
.card-img img{width:100%;height:100%;object-fit:cover;transition:transform .45s}
.card:hover .card-img img{transform:scale(1.03)}
.card-body{padding:12px 14px 16px}
.card-title{font-size:16px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card-meta{display:flex;align-items:center;justify-content:space-between;margin-top:10px;gap:8px}
.badge{font-size:12px;line-height:1.6;padding:1px 8px;border-radius:6px;border:1px solid;white-space:nowrap}
.badge-hd{color:var(--cyan);border-color:rgba(22,224,196,.45);background:rgba(22,224,196,.1)}
.badge-bd{color:#8FB0FF;border-color:rgba(61,107,255,.45);background:rgba(61,107,255,.12)}
.badge-up{color:var(--amber);border-color:rgba(255,180,92,.45);background:rgba(255,180,92,.1)}
.score{font-size:14px;font-weight:600;color:var(--amber);font-variant-numeric:tabular-nums}

/* hot */
.hot-list{display:grid;grid-template-columns:1fr 1fr;gap:0 44px}
.hot-item{display:flex;gap:14px;align-items:center;padding:16px 0;border-bottom:1px solid var(--line);transition:background .2s}
.hot-item:hover{background:rgba(255,255,255,.03)}
.hot-thumb{width:56px;height:76px;border-radius:12px;overflow:hidden;flex:none;background:var(--bg3)}
.hot-thumb img{width:100%;height:100%;object-fit:cover}
.hot-info{flex:1;min-width:0}
.hot-info h3{font-size:16px;margin-bottom:4px}
.hot-info p{font-size:13px;color:var(--muted);margin:0 0 6px}
.hot-foot{display:flex;align-items:center;gap:10px;font-size:12px;color:var(--muted)}

/* channels */
.chan-grid{display:grid;grid-template-columns:repeat(5,1fr)}
.chan{display:block;padding:20px 20px 26px;border-top:1px solid var(--line);border-left:1px solid var(--line);transition:background .2s}
.chan:hover{background:rgba(255,255,255,.04)}
.chan h3{font-size:19px;margin-bottom:10px;display:flex;align-items:center;justify-content:space-between}
.chan h3 span{color:var(--cyan);font-size:14px;transition:transform .2s}
.chan:hover h3 span{transform:translateX(3px)}
.chan p{font-size:13px;color:var(--muted);margin:0}

/* ranking */
.rank-list{display:grid;grid-template-columns:1fr 1fr;grid-template-rows:repeat(5,auto);grid-auto-flow:column;gap:0 48px}
.rank-list li{display:flex;align-items:center;gap:12px;height:52px;border-bottom:1px solid var(--line);transition:background .2s}
.rank-list li:hover{background:rgba(255,255,255,.04)}
.rank-no{width:24px;text-align:right;font-size:13px;color:var(--muted);font-variant-numeric:tabular-nums;flex:none}
.rank-no.top{color:var(--amber);border:1px solid rgba(255,180,92,.5);border-radius:999px;padding:0 5px;width:auto}
.rank-name{flex:1;min-width:0;font-size:15px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.rank-heat{font-size:12px;color:var(--muted);font-variant-numeric:tabular-nums}
.rank-cat{font-size:12px;color:var(--muted);border:1px solid var(--line);border-radius:6px;padding:1px 6px;flex:none}

/* cases */
.case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;align-items:start}
.case-card{background:var(--glass);border:1px solid var(--line2);border-radius:var(--r);padding:24px;backdrop-filter:blur(14px) saturate(120%)}
.case-card:nth-child(2){margin-top:-24px}
.case-org{font-size:13px;color:var(--muted)}
.case-num{display:block;font-size:38px;font-weight:700;color:var(--cyan);font-variant-numeric:tabular-nums;line-height:1.2;margin:10px 0 6px}
.case-card p{font-size:14px;color:var(--muted);margin:0 0 16px}
.case-card .more{margin-left:0;display:inline-block}

/* pricing */
.price-switch{display:flex;gap:8px;margin-bottom:28px}
.pill{font-size:13px;padding:6px 18px;border-radius:999px;border:1px solid var(--line);color:var(--muted)}
.pill.active{border-color:rgba(22,224,196,.55);color:var(--cyan);background:rgba(22,224,196,.1)}
.price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;align-items:start}
.price-card{background:var(--glass);border:1px solid var(--line2);border-radius:var(--r);padding:26px;backdrop-filter:blur(14px) saturate(120%);position:relative}
.price-card.featured{border-color:rgba(22,224,196,.55);margin-top:-12px;padding-bottom:34px}
.flag{position:absolute;top:-11px;left:26px;font-size:12px;padding:1px 10px;border-radius:6px;color:var(--amber);border:1px solid rgba(255,180,92,.5);background:rgba(255,180,92,.1)}
.price-card h3{font-size:17px;margin-bottom:14px}
.price-num{font-size:34px;font-weight:700;font-variant-numeric:tabular-nums;line-height:1.2}
.price-num small{font-size:13px;font-weight:400;color:var(--muted);margin-left:4px}
.feat{margin:18px 0 22px}
.feat li{font-size:14px;color:var(--muted);padding:6px 0 6px 22px;position:relative}
.feat li::before{content:"✓";position:absolute;left:0;color:var(--cyan);font-size:13px}
.price-card .btn{width:100%}
.price-bar{margin-top:24px;display:flex;align-items:center;gap:20px;flex-wrap:wrap;background:rgba(255,255,255,.04);border:1px solid var(--line2);border-radius:var(--r);padding:20px 26px}
.price-bar h3{font-size:16px}
.price-bar p{font-size:13px;color:var(--muted);margin:0;flex:1;min-width:220px}

/* quotes */
.quote-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px 44px}
.quote{border-left:2px solid var(--cyan);padding:2px 0 2px 16px}
.quote:nth-child(even){margin-top:22px}
.quote p{font-size:15px;margin:0 0 8px}
.quote cite{font-style:normal;font-size:12px;color:var(--muted)}

/* word of mouth */
.split{display:grid;grid-template-columns:1fr 1fr;gap:52px;align-items:start}
.kpi-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px 20px}
.kpi-num{display:block;font-size:32px;font-weight:700;font-variant-numeric:tabular-nums;line-height:1.2}
.kpi-label{font-size:12px;color:var(--muted)}
.letter{display:block;padding:14px 0;border-bottom:1px solid var(--line);transition:background .2s}
.letter:hover{background:rgba(255,255,255,.03)}
.letter h3{font-size:15px;margin-bottom:4px}
.letter p{font-size:13px;color:var(--muted);margin:0 0 6px}
.letter time{font-size:12px;color:#68748c;font-variant-numeric:tabular-nums}

/* news */
.news-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 44px}
.news-item{display:flex;gap:14px;padding:14px 0;border-bottom:1px solid var(--line);transition:background .2s}
.news-item:hover{background:rgba(255,255,255,.03)}
.news-thumb{width:120px;height:68px;border-radius:12px;overflow:hidden;flex:none;background:var(--bg3)}
.news-thumb img{width:100%;height:100%;object-fit:cover}
.news-body{min-width:0}
.news-body h3{font-size:15px;margin-bottom:6px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-foot{display:flex;gap:10px;align-items:center;font-size:12px;color:var(--muted)}
.news-foot time{font-variant-numeric:tabular-nums;color:#68748c}

/* faq */
.faq-list{max-width:900px}
.faq-list details{border-bottom:1px solid var(--line);padding:14px 0}
.faq-list summary{list-style:none;cursor:pointer;font-size:16px;font-weight:600;display:flex;justify-content:space-between;gap:16px;align-items:center}
.faq-list summary::-webkit-details-marker{display:none}
.faq-list summary::after{content:"+";color:var(--cyan);font-size:18px;flex:none}
.faq-list details[open] summary::after{content:"−"}
.faq-list p{font-size:14px;color:var(--muted);margin:10px 0 0;max-width:760px}

/* cta */
.cta-band{background:linear-gradient(140deg,rgba(61,107,255,.16),rgba(22,224,196,.08));border:1px solid var(--line2);border-radius:var(--r);padding:44px;backdrop-filter:blur(14px) saturate(120%)}
.cta-band h2{font-size:26px;margin-bottom:10px}
.cta-band .lead{font-size:15px;color:var(--muted);margin:0 0 28px}
.cta-form{display:grid;grid-template-columns:1fr 1fr auto;gap:16px;align-items:end}
.form-row label{display:block;font-size:12px;color:var(--muted);margin-bottom:6px}
.form-row .field{width:100%;border-radius:12px}
.cta-note{font-size:12px;color:var(--muted);margin:18px 0 0}
.trust{display:flex;gap:22px;flex-wrap:wrap;margin-top:14px;font-size:13px;color:var(--text)}
.trust li{position:relative;padding-left:14px}
.trust li::before{content:"";position:absolute;left:0;top:8px;width:5px;height:5px;border-radius:50%;background:var(--cyan)}

/* footer */
.site-foot{background:var(--bg2);border-top:1px solid var(--line);padding:56px 0 24px}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:36px}
.foot-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.foot-brand .brand-mark{width:40px;height:40px;font-size:17px}
.foot-brand b{font-size:16px}
.site-foot p{font-size:13px;color:var(--muted);margin:0 0 10px}
.foot-col h3{font-size:13px;letter-spacing:.08em;color:var(--text);margin-bottom:14px}
.foot-col li{margin-bottom:9px}
.foot-col a{font-size:13px;color:var(--muted);transition:color .2s}
.foot-col a:hover{color:var(--cyan)}
.foot-sub .nl-form{margin-top:10px}
.foot-sub .field{border-radius:999px}
.copyright{margin-top:36px;padding-top:16px;border-top:1px solid var(--line);font-size:12px;color:#68748c}

@media (max-width:1024px){
  .nav-burger{display:flex}
  .nav-actions{display:none}
  .nav-panel{position:fixed;inset:72px 0 0;background:rgba(8,12,26,.97);backdrop-filter:blur(18px);flex-direction:column;align-items:stretch;padding:20px 24px 32px;gap:0;display:none;overflow-y:auto}
  .nav-toggle:checked ~ .nav-panel{display:flex}
  .nav-list{flex-direction:column;width:100%}
  .nav-list a{padding:16px 4px;font-size:18px;border-radius:0;border-bottom:1px solid var(--line)}
  .panel-cta{display:block;margin-top:24px}
  .panel-cta .btn{width:100%}
  .hero-inner{grid-template-columns:1fr}
  .hero h1{font-size:34px}
  .cap-list{grid-template-columns:1fr 1fr;gap:26px 0}
  .chan-grid{grid-template-columns:1fr 1fr}
  .poster-grid{grid-template-columns:repeat(3,1fr)}
  .price-grid{grid-template-columns:1fr}
  .price-card.featured{margin-top:0}
  .case-card:nth-child(2){margin-top:0}
  .case-grid{grid-template-columns:1fr}
  .split{grid-template-columns:1fr;gap:36px}
  .foot-grid{grid-template-columns:1fr 1fr}
  .cta-band{padding:32px}
  .cta-form{grid-template-columns:1fr 1fr}
  .cta-form .btn{grid-column:1 / -1;width:100%}
  .rank-list{gap:0 32px}
}
@media (max-width:768px){
  .sec{padding:48px 0}
  .hero{padding:52px 0 40px}
  .hero h1{font-size:28px}
  .sec-head h2{font-size:20px}
  .sec-head{margin-bottom:24px}
  .stat-bar{grid-template-columns:1fr 1fr;margin-top:36px}
  .stat-bar li:nth-child(2){border-right:0}
  .stat-bar li{border-bottom:1px solid var(--line)}
  .cap-list{grid-template-columns:1fr}
  .cap-item{padding:14px 0 14px 16px;border-left:1px solid var(--line)}
  .scene{grid-template-columns:1fr;gap:18px}
  .scene:nth-child(even) .scene-fig{order:0}
  .demo-grid{grid-template-columns:1fr}
  .poster-grid{grid-template-columns:1fr 1fr;gap:14px}
  .hot-list{grid-template-columns:1fr}
  .chan-grid{grid-template-columns:1fr}
  .rank-list{grid-template-columns:1fr;grid-template-rows:auto;grid-auto-flow:row}
  .quote-grid{grid-template-columns:1fr}
  .quote:nth-child(even){margin-top:0}
  .news-grid{grid-template-columns:1fr}
  .price-bar{padding:18px}
  .foot-grid{grid-template-columns:1fr;gap:28px}
  .kpi-grid{gap:20px 16px}
  .cta-form{grid-template-columns:1fr}
  .price-num{font-size:30px}
}
@media (max-width:520px){
  .container{padding:0 20px}
  .brand-mark{width:40px;height:40px;font-size:17px}
  .brand-name{font-size:15px}
  .nav-bar{height:60px}
  .nav-panel{inset:60px 0 0}
  .hero-btns .btn{width:100%}
  .hot-thumb{width:48px;height:66px}
  .news-thumb{width:96px;height:54px}
  .poster-grid{grid-template-columns:1fr}
  .cta-band{padding:24px}
  .trust{gap:12px 18px}
}