/* roulang page: index */
:root{
  --bg:#060a13;
  --bg-soft:#0a1220;
  --bg-deep:#04070e;
  --surface:#101a2c;
  --surface-2:#152138;
  --line:rgba(120,165,225,.16);
  --line-hi:rgba(86,214,255,.45);
  --text:#e9f1fb;
  --muted:#94a7c2;
  --cyan:#33d3ee;
  --cyan-deep:#12b8d6;
  --violet:#8a7dff;
  --gold:#f2c14e;
  --r-lg:16px;
  --r-md:12px;
  --r-sm:8px;
  --shadow:0 12px 30px rgba(2,7,18,.55);
  --shadow-hi:0 22px 48px rgba(2,7,18,.72);
  --container:1180px;
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:'Noto Sans SC',-apple-system,BlinkMacSystemFont,'Segoe UI','PingFang SC','Microsoft YaHei',sans-serif;
  font-size:15px;
  line-height:1.78;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border-radius:var(--r-md);}
a{color:var(--cyan);text-decoration:none;transition:color .2s ease;}
a:hover{color:#7fe8f9;}
a:focus-visible,button:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:6px;}
h1,h2,h3,h4{margin:0 0 12px;line-height:1.35;font-weight:800;letter-spacing:.01em;color:#fff;}
p{margin:0 0 14px;color:var(--muted);}
ul{margin:0;padding:0;list-style:none;}
button{font-family:inherit;cursor:pointer;border:0;background:none;color:inherit;}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 22px;}

/* header */
.site-header{position:sticky;top:0;z-index:80;background:rgba(6,10,19,.88);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid var(--line);box-shadow:0 8px 26px rgba(0,0,0,.4);}
.header-inner{display:flex;align-items:center;height:64px;gap:18px;position:relative;}
.brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:900;font-size:16px;letter-spacing:.02em;white-space:nowrap;}
.brand:hover{color:#fff;}
.brand-mark{width:36px;height:36px;border-radius:11px;background:linear-gradient(135deg,var(--cyan),var(--violet));display:grid;place-items:center;color:#04121c;box-shadow:0 0 20px rgba(51,211,238,.38);flex:none;}
.brand-mark svg{width:20px;height:20px;}
.main-nav{display:flex;align-items:center;gap:4px;margin:0 auto;}
.main-nav a{position:relative;padding:8px 14px;border-radius:8px;font-size:14px;font-weight:500;color:var(--muted);transition:color .2s,background .2s;}
.main-nav a:hover{color:#fff;background:rgba(51,211,238,.08);}
.main-nav a.active{color:#fff;background:rgba(51,211,238,.13);}
.main-nav a.active::after{content:"";position:absolute;left:14px;right:14px;bottom:1px;height:2px;border-radius:2px;background:linear-gradient(90deg,var(--cyan),var(--violet));box-shadow:0 0 10px rgba(51,211,238,.75);}
.header-actions{margin-left:auto;display:flex;align-items:center;gap:10px;}
.nav-toggle{display:none;width:40px;height:40px;border-radius:10px;border:1px solid var(--line);align-items:center;justify-content:center;color:var(--text);}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:11px 22px;border-radius:var(--r-sm);font-size:14px;font-weight:700;line-height:1;transition:transform .2s ease,box-shadow .2s ease,background .2s ease,border-color .2s ease,color .2s ease;border:1px solid transparent;white-space:nowrap;min-height:42px;}
.btn-primary{background:linear-gradient(135deg,var(--cyan),var(--cyan-deep));color:#03121a;box-shadow:0 8px 22px rgba(51,211,238,.3);}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 14px 30px rgba(51,211,238,.42);color:#03121a;}
.btn-ghost{background:rgba(255,255,255,.03);border-color:var(--line);color:var(--text);}
.btn-ghost:hover{transform:translateY(-2px);border-color:var(--line-hi);color:#fff;background:rgba(51,211,238,.08);box-shadow:0 10px 24px rgba(2,7,18,.5);}
.btn-sm{padding:8px 16px;min-height:36px;font-size:13px;}

/* hero */
.hero{position:relative;padding:76px 0 86px;overflow:hidden;background-image:linear-gradient(100deg,rgba(4,7,14,.97) 0%,rgba(5,9,18,.9) 45%,rgba(6,12,24,.66) 100%),url('/assets/images/0ef90c0a4478cd21.webp');background-size:cover;background-position:center;border-bottom:1px solid var(--line);}
.hero::before{content:"";position:absolute;left:-160px;top:-140px;width:420px;height:420px;border-radius:50%;background:radial-gradient(circle,rgba(51,211,238,.18),transparent 68%);pointer-events:none;}
.hero::after{content:"";position:absolute;right:-120px;bottom:-180px;width:460px;height:460px;border-radius:50%;background:radial-gradient(circle,rgba(138,125,255,.16),transparent 70%);pointer-events:none;}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:52px;align-items:center;position:relative;z-index:2;}
.eyebrow{display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:999px;border:1px solid rgba(51,211,238,.35);background:rgba(51,211,238,.08);color:#8fe9f8;font-size:12.5px;font-weight:700;letter-spacing:.06em;margin-bottom:20px;}
.eyebrow svg{width:14px;height:14px;}
.hero h1{font-size:42px;line-height:1.24;margin-bottom:16px;letter-spacing:-.01em;}
.hero h1 em{font-style:normal;background:linear-gradient(120deg,var(--cyan),var(--violet));-webkit-background-clip:text;background-clip:text;color:transparent;}
.hero-sub{font-size:16px;color:#b9cae0;font-weight:500;margin-bottom:14px;}
.hero-desc{font-size:14.5px;color:#93a7c1;line-height:1.85;max-width:560px;margin-bottom:26px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:24px;}
.chip-row{display:flex;flex-wrap:wrap;gap:10px;}
.chip{display:inline-flex;align-items:center;gap:6px;padding:7px 14px;border-radius:999px;font-size:12.5px;font-weight:600;color:#a9bed8;background:rgba(255,255,255,.035);border:1px solid var(--line);transition:all .2s ease;}
.chip:hover{color:#fff;border-color:var(--line-hi);background:rgba(51,211,238,.1);}

/* hero quick grid */
.quick-panel{position:relative;}
.quick-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px;}
.quick-card{display:block;padding:20px 18px;border-radius:var(--r-lg);background:linear-gradient(160deg,rgba(21,33,56,.92),rgba(13,21,36,.94));border:1px solid var(--line);box-shadow:var(--shadow);transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;color:var(--text);}
.quick-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hi);border-color:var(--line-hi);color:#fff;}
.quick-icon{width:38px;height:38px;border-radius:11px;display:grid;place-items:center;background:rgba(51,211,238,.12);color:var(--cyan);margin-bottom:12px;border:1px solid rgba(51,211,238,.2);}
.quick-icon svg{width:19px;height:19px;}
.quick-card h3{font-size:14.5px;margin-bottom:6px;}
.quick-card p{font-size:12.5px;line-height:1.7;margin:0;color:var(--muted);}

/* sections */
.section{padding:72px 0;position:relative;}
.section.alt{background:var(--bg-soft);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.section-head{max-width:760px;margin-bottom:40px;}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center;}
.section-tag{display:inline-flex;align-items:center;gap:8px;font-size:12.5px;font-weight:800;letter-spacing:.14em;color:var(--cyan);text-transform:uppercase;margin-bottom:12px;}
.section-tag::before{content:"";width:22px;height:2px;border-radius:2px;background:linear-gradient(90deg,var(--cyan),var(--violet));box-shadow:0 0 8px rgba(51,211,238,.7);}
.section h2{font-size:30px;line-height:1.32;margin-bottom:14px;}
.section-head p{font-size:14.5px;color:var(--muted);line-height:1.85;margin:0;}

/* trust strip */
.trust-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;}
.trust-item{display:flex;gap:14px;padding:22px;border-radius:var(--r-lg);background:var(--surface);border:1px solid var(--line);transition:transform .22s ease,border-color .22s ease,box-shadow .22s ease;}
.trust-item:hover{transform:translateY(-3px);border-color:var(--line-hi);box-shadow:var(--shadow);}
.trust-item .t-icon{width:40px;height:40px;flex:none;border-radius:11px;display:grid;place-items:center;background:rgba(138,125,255,.14);color:#a99dff;border:1px solid rgba(138,125,255,.24);}
.trust-item .t-icon svg{width:19px;height:19px;}
.trust-item h3{font-size:14.5px;margin-bottom:4px;}
.trust-item p{font-size:12.5px;margin:0;line-height:1.7;}

/* checklist */
.check-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;}
.check-card{padding:24px 22px;border-radius:var(--r-lg);background:linear-gradient(160deg,rgba(21,33,56,.8),rgba(11,18,32,.9));border:1px solid var(--line);position:relative;overflow:hidden;transition:transform .22s ease,border-color .22s ease,box-shadow .22s ease;}
.check-card::before{content:"";position:absolute;left:0;top:0;width:3px;height:100%;background:linear-gradient(180deg,var(--cyan),transparent);opacity:.65;}
.check-card:hover{transform:translateY(-4px);border-color:var(--line-hi);box-shadow:var(--shadow-hi);}
.check-num{font-size:12px;font-weight:800;color:var(--cyan);letter-spacing:.16em;margin-bottom:8px;}
.check-card h3{font-size:15.5px;margin-bottom:8px;}
.check-card p{font-size:13px;line-height:1.75;margin:0;}

/* badges */
.badge-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:16px;}
.badge-item{display:flex;flex-direction:column;align-items:center;text-align:center;gap:10px;padding:26px 14px;border-radius:var(--r-lg);background:rgba(255,255,255,.025);border:1px dashed rgba(120,165,225,.26);transition:border-color .22s ease,background .22s ease,transform .22s ease;}
.badge-item:hover{transform:translateY(-3px);border-color:var(--line-hi);background:rgba(51,211,238,.06);}
.badge-ring{width:48px;height:48px;border-radius:50%;display:grid;place-items:center;border:1px solid rgba(51,211,238,.4);color:var(--cyan);background:rgba(51,211,238,.08);}
.badge-ring svg{width:22px;height:22px;}
.badge-item span{font-size:13px;font-weight:700;color:#cfdcee;}

/* split */
.split{display:grid;grid-template-columns:1.05fr .95fr;gap:46px;align-items:center;}
.split-media img{width:100%;height:100%;max-height:380px;object-fit:cover;border-radius:var(--r-lg);border:1px solid var(--line);box-shadow:var(--shadow-hi);}
.split-body h2{margin-bottom:16px;}
.split-body p{font-size:14.5px;line-height:1.85;}
.mini-list{margin-top:20px;display:grid;gap:12px;}
.mini-list li{display:flex;gap:12px;align-items:flex-start;font-size:13.5px;color:#b6c6dc;line-height:1.7;}
.mini-list li svg{width:18px;height:18px;flex:none;margin-top:3px;color:var(--cyan);}

/* tiles */
.tile-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.tile{display:flex;flex-direction:column;padding:26px 24px;border-radius:var(--r-lg);background:var(--surface);border:1px solid var(--line);box-shadow:var(--shadow);transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;}
.tile:hover{transform:translateY(-4px);box-shadow:var(--shadow-hi);border-color:var(--line-hi);}
.tile-ico{width:44px;height:44px;border-radius:12px;display:grid;place-items:center;background:linear-gradient(140deg,rgba(51,211,238,.16),rgba(138,125,255,.16));color:var(--cyan);margin-bottom:16px;border:1px solid rgba(51,211,238,.2);}
.tile-ico svg{width:21px;height:21px;}
.tile h3{font-size:16px;margin-bottom:8px;}
.tile p{font-size:13.5px;line-height:1.78;margin:0 0 14px;}
.tile .tagline{margin-top:auto;display:inline-flex;align-self:flex-start;padding:4px 11px;border-radius:999px;font-size:11.5px;font-weight:700;color:#8fe9f8;background:rgba(51,211,238,.1);border:1px solid rgba(51,211,238,.22);}

/* cannon cards */
.cannon-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.cannon-card{padding:28px 24px;border-radius:var(--r-lg);background:linear-gradient(170deg,rgba(21,33,56,.92),rgba(10,17,30,.96));border:1px solid var(--line);transition:transform .22s ease,border-color .22s ease,box-shadow .22s ease;}
.cannon-card:hover{transform:translateY(-4px);border-color:var(--line-hi);box-shadow:var(--shadow-hi);}
.cannon-card .level{font-size:12px;font-weight:800;letter-spacing:.16em;color:var(--violet);margin-bottom:10px;}
.cannon-card h3{font-size:19px;margin-bottom:6px;}
.cannon-card .rate{font-size:13px;color:var(--gold);font-weight:700;margin-bottom:12px;}
.cannon-card p{font-size:13.5px;line-height:1.78;margin:0 0 16px;}
.cannon-card ul{display:grid;gap:8px;}
.cannon-card ul li{font-size:12.8px;color:#a9bdd6;display:flex;gap:8px;line-height:1.65;}
.cannon-card ul li::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--cyan);flex:none;margin-top:8px;}

/* scenes */
.scene-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;}
.scene-card{padding:24px 20px;border-radius:var(--r-lg);background:rgba(255,255,255,.028);border:1px solid var(--line);transition:background .22s ease,border-color .22s ease,transform .22s ease;}
.scene-card:hover{background:rgba(51,211,238,.07);border-color:var(--line-hi);transform:translateY(-3px);}
.scene-card h3{font-size:15px;margin-bottom:8px;display:flex;align-items:center;gap:9px;}
.scene-card h3 svg{width:17px;height:17px;color:var(--cyan);}
.scene-card p{font-size:13px;margin:0;line-height:1.75;}

/* demo */
.demo-wrap{display:grid;grid-template-columns:.95fr 1.05fr;gap:36px;align-items:center;}
.demo-steps{display:grid;gap:14px;}
.demo-step{display:flex;gap:16px;padding:18px 20px;border-radius:var(--r-md);background:var(--surface);border:1px solid var(--line);transition:border-color .22s ease,transform .22s ease;}
.demo-step:hover{border-color:var(--line-hi);transform:translateX(4px);}
.demo-step .num{width:30px;height:30px;flex:none;border-radius:9px;display:grid;place-items:center;font-size:13px;font-weight:800;color:#03121a;background:linear-gradient(135deg,var(--cyan),var(--violet));}
.demo-step h3{font-size:14.5px;margin-bottom:4px;}
.demo-step p{font-size:12.8px;margin:0;line-height:1.7;}
.meter-panel{padding:30px 28px;border-radius:var(--r-lg);background:linear-gradient(160deg,rgba(21,33,56,.95),rgba(9,15,27,.98));border:1px solid var(--line);box-shadow:var(--shadow-hi);}
.meter-panel h3{font-size:15.5px;margin-bottom:22px;color:#cfe0f4;}
.meter{margin-bottom:20px;}
.meter:last-child{margin-bottom:0;}
.meter-top{display:flex;justify-content:space-between;font-size:12.8px;color:#a9bdd6;margin-bottom:8px;}
.meter-top b{color:var(--cyan);font-size:13.5px;}
.meter-bar{height:8px;border-radius:999px;background:rgba(255,255,255,.07);overflow:hidden;}
.meter-fill{height:100%;border-radius:999px;background:linear-gradient(90deg,var(--cyan),var(--violet));box-shadow:0 0 14px rgba(51,211,238,.55);}

/* records */
.record-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.record-card{padding:24px;border-radius:var(--r-lg);background:var(--surface);border:1px solid var(--line);border-left:3px solid rgba(51,211,238,.6);transition:transform .22s ease,box-shadow .22s ease;}
.record-card:hover{transform:translateY(-3px);box-shadow:var(--shadow);}
.record-card h3{font-size:15px;margin-bottom:10px;}
.record-card p{font-size:13.3px;line-height:1.8;margin:0 0 14px;}
.record-meta{font-size:12px;color:#7d90aa;display:flex;gap:12px;}
.record-meta span{display:inline-flex;align-items:center;gap:5px;}

/* tiers table */
.tier-table{width:100%;border-collapse:separate;border-spacing:0;border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--line);background:var(--surface);}
.tier-table th,.tier-table td{padding:16px 18px;text-align:left;font-size:13.5px;border-bottom:1px solid var(--line);color:#b8c9de;}
.tier-table thead th{background:rgba(51,211,238,.08);color:#dff7fd;font-size:13px;font-weight:800;letter-spacing:.05em;}
.tier-table tbody tr:last-child td{border-bottom:0;}
.tier-table tbody tr:hover{background:rgba(51,211,238,.05);}
.tier-table td:first-child{color:#fff;font-weight:700;}

/* kpi */
.kpi-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;}
.kpi{padding:28px 22px;border-radius:var(--r-lg);background:linear-gradient(165deg,rgba(21,33,56,.9),rgba(9,15,27,.95));border:1px solid var(--line);text-align:center;transition:transform .22s ease,border-color .22s ease;}
.kpi:hover{transform:translateY(-3px);border-color:var(--line-hi);}
.kpi b{display:block;font-size:34px;line-height:1.1;font-weight:900;background:linear-gradient(120deg,var(--cyan),var(--violet));-webkit-background-clip:text;background-clip:text;color:transparent;margin-bottom:8px;}
.kpi span{font-size:13px;color:var(--muted);}

/* news */
.news-layout{display:grid;grid-template-columns:1.6fr .95fr;gap:28px;align-items:start;}
.news-list{display:grid;gap:16px;}
.news-item{display:flex;gap:18px;padding:18px;border-radius:var(--r-lg);background:var(--surface);border:1px solid var(--line);color:var(--text);transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;}
.news-item:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:var(--line-hi);color:#fff;}
.news-thumb{width:132px;height:92px;flex:none;overflow:hidden;border-radius:var(--r-md);}
.news-thumb img{width:100%;height:100%;object-fit:cover;border-radius:0;transition:transform .35s ease;}
.news-item:hover .news-thumb img{transform:scale(1.06);}
.news-body h3{font-size:15px;margin-bottom:6px;line-height:1.5;}
.news-body p{font-size:12.8px;line-height:1.7;margin:0 0 10px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-meta{display:flex;gap:14px;font-size:11.8px;color:#7e91ab;}
.news-meta span{color:#8fe9f8;}
.side-panel{padding:24px;border-radius:var(--r-lg);background:linear-gradient(165deg,rgba(21,33,56,.92),rgba(9,15,27,.96));border:1px solid var(--line);}
.side-panel h3{font-size:15px;margin-bottom:16px;padding-bottom:12px;border-bottom:1px solid var(--line);}
.side-list{display:grid;gap:14px;}
.side-list a{display:block;color:#b9cae0;font-size:13.2px;line-height:1.65;padding-left:14px;position:relative;transition:color .2s ease;}
.side-list a::before{content:"";position:absolute;left:0;top:9px;width:5px;height:5px;border-radius:50%;background:var(--cyan);}
.side-list a:hover{color:var(--cyan);}
.empty-note{padding:34px;text-align:center;border-radius:var(--r-lg);border:1px dashed rgba(120,165,225,.3);color:var(--muted);font-size:14px;}

/* channel */
.channel-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.channel-card{display:block;padding:28px 24px;border-radius:var(--r-lg);background:linear-gradient(160deg,rgba(21,33,56,.9),rgba(10,17,30,.96));border:1px solid var(--line);color:var(--text);transition:transform .22s ease,border-color .22s ease,box-shadow .22s ease;}
.channel-card:hover{transform:translateY(-4px);border-color:var(--line-hi);box-shadow:var(--shadow-hi);color:#fff;}
.channel-card .c-idx{font-size:12px;font-weight:800;letter-spacing:.16em;color:var(--violet);margin-bottom:10px;}
.channel-card h3{font-size:17px;margin-bottom:8px;}
.channel-card p{font-size:13.2px;line-height:1.75;margin:0 0 16px;}
.channel-card .more{font-size:13px;font-weight:700;color:var(--cyan);display:inline-flex;align-items:center;gap:6px;}
.channel-card .more svg{width:15px;height:15px;transition:transform .2s ease;}
.channel-card:hover .more svg{transform:translateX(4px);}

/* voices */
.voice-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;}
.voice-card{padding:26px 24px;border-radius:var(--r-lg);background:var(--surface);border:1px solid var(--line);transition:transform .22s ease,border-color .22s ease,box-shadow .22s ease;}
.voice-card:hover{transform:translateY(-3px);border-color:var(--line-hi);box-shadow:var(--shadow);}
.voice-card p{font-size:13.8px;line-height:1.85;color:#c3d3e6;margin:0 0 16px;}
.voice-user{display:flex;align-items:center;gap:12px;}
.voice-avatar{width:38px;height:38px;border-radius:50%;display:grid;place-items:center;background:linear-gradient(135deg,rgba(51,211,238,.3),rgba(138,125,255,.3));color:#fff;font-weight:800;font-size:14px;border:1px solid rgba(51,211,238,.3);}
.voice-user b{display:block;font-size:13.2px;color:#e6eefa;}
.voice-user span{font-size:11.8px;color:#7e91ab;}

/* myths */
.myth-list{display:grid;gap:16px;}
.myth-item{display:grid;grid-template-columns:1fr 1fr;gap:22px;padding:22px 24px;border-radius:var(--r-lg);background:var(--surface);border:1px solid var(--line);transition:border-color .22s ease;}
.myth-item:hover{border-color:var(--line-hi);}
.myth-wrong span,.myth-right span{display:inline-block;font-size:11.5px;font-weight:800;letter-spacing:.1em;padding:3px 10px;border-radius:999px;margin-bottom:9px;}
.myth-wrong span{color:#f39ab4;background:rgba(233,84,120,.12);border:1px solid rgba(233,84,120,.28);}
.myth-right span{color:#7fe8c8;background:rgba(51,211,163,.1);border:1px solid rgba(51,211,163,.26);}
.myth-wrong p,.myth-right p{font-size:13.3px;line-height:1.78;margin:0;}
.myth-right p{color:#c3d3e6;}

/* faq */
.faq-wrap{display:grid;gap:14px;max-width:900px;margin:0 auto;}
.faq-item{border-radius:var(--r-md);background:var(--surface);border:1px solid var(--line);overflow:hidden;transition:border-color .22s ease;}
.faq-item[open]{border-color:var(--line-hi);}
.faq-item summary{list-style:none;cursor:pointer;padding:18px 22px;font-size:15px;font-weight:700;color:#e6eefa;display:flex;justify-content:space-between;align-items:center;gap:16px;transition:background .2s ease;}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary:hover{background:rgba(51,211,238,.06);}
.faq-item summary::after{content:"+";font-size:20px;font-weight:400;color:var(--cyan);line-height:1;transition:transform .22s ease;}
.faq-item[open] summary::after{content:"−";}
.faq-item .faq-a{padding:0 22px 20px;font-size:13.6px;line-height:1.85;color:var(--muted);}

/* cta */
.cta-band{position:relative;padding:64px 44px;border-radius:20px;overflow:hidden;text-align:center;background-image:linear-gradient(115deg,rgba(4,7,14,.94),rgba(10,26,44,.86)),url('/assets/images/6f6271d6a4c2864a.webp');background-size:cover;background-position:center;border:1px solid var(--line-hi);box-shadow:var(--shadow-hi);}
.cta-band h2{font-size:28px;margin-bottom:14px;}
.cta-band p{max-width:660px;margin:0 auto 26px;font-size:14.5px;line-height:1.85;color:#a9bdd6;}
.cta-actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;}

/* footer */
.site-footer{background:var(--bg-deep);border-top:1px solid var(--line);padding:56px 0 0;margin-top:0;}
.footer-grid{display:grid;grid-template-columns:1.3fr 1fr 1fr 1.2fr;gap:36px;padding-bottom:40px;}
.footer-brand .brand{margin-bottom:14px;}
.footer-brand p{font-size:13px;line-height:1.8;color:#7e91ab;max-width:280px;}
.footer-col h4{font-size:13.5px;color:#dce8f6;margin-bottom:16px;letter-spacing:.05em;}
.footer-col ul{display:grid;gap:10px;}
.footer-col ul a{font-size:13px;color:#8ba0ba;transition:color .2s ease,padding-left .2s ease;}
.footer-col ul a:hover{color:var(--cyan);padding-left:4px;}
.footer-bottom{border-top:1px solid var(--line);padding:20px 0;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:12.5px;color:#6d8099;}
.footer-bottom a{color:#8ba0ba;}
.footer-bottom a:hover{color:var(--cyan);}

/* responsive */
@media (max-width:1080px){
  .hero h1{font-size:36px;}
  .trust-strip{grid-template-columns:repeat(2,1fr);}
  .badge-grid{grid-template-columns:repeat(3,1fr);}
  .kpi-grid{grid-template-columns:repeat(2,1fr);}
  .scene-grid{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:1fr 1fr;}
}
@media (max-width:900px){
  .main-nav{position:absolute;top:64px;left:0;right:0;flex-direction:column;align-items:stretch;gap:2px;background:#0a1220;border-bottom:1px solid var(--line);padding:10px 16px 18px;display:none;box-shadow:var(--shadow-hi);}
  .main-nav.open{display:flex;}
  .main-nav a{padding:12px 14px;font-size:14.5px;}
  .main-nav a.active::after{left:14px;right:auto;width:26px;bottom:8px;}
  .nav-toggle{display:inline-flex;}
  .hero{padding:56px 0 64px;}
  .hero-grid{grid-template-columns:1fr;gap:36px;}
  .hero h1{font-size:31px;}
  .hero-desc{max-width:none;}
  .split,.demo-wrap{grid-template-columns:1fr;gap:30px;}
  .tile-grid,.check-grid,.cannon-grid,.record-grid,.channel-grid{grid-template-columns:repeat(2,1fr);}
  .news-layout{grid-template-columns:1fr;}
  .myth-item{grid-template-columns:1fr;gap:16px;}
  .voice-grid{grid-template-columns:1fr;}
  .section{padding:56px 0;}
  .section h2{font-size:25px;}
  .cta-band{padding:48px 24px;}
}
@media (max-width:640px){
  .container{padding:0 16px;}
  .brand span.brand-name{font-size:14px;}
  .header-actions .btn-sm{display:none;}
  .hero h1{font-size:26px;}
  .hero-sub{font-size:14.5px;}
  .trust-strip,.tile-grid,.check-grid,.cannon-grid,.record-grid,.channel-grid,.badge-grid,.scene-grid,.kpi-grid{grid-template-columns:1fr;}
  .quick-grid{grid-template-columns:1fr 1fr;gap:12px;}
  .news-item{flex-direction:column;gap:12px;}
  .news-thumb{width:100%;height:160px;}
  .tier-table{display:block;overflow-x:auto;white-space:nowrap;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;text-align:left;}
  .section h2{font-size:22px;}
  .cta-band h2{font-size:22px;}
  .btn{width:100%;}
  .hero-actions .btn,.cta-actions .btn{width:100%;}
}

/* roulang page: article */
:root{
  --bg:#060a13;
  --bg-soft:#0a1220;
  --bg-deep:#04070e;
  --surface:#101a2c;
  --surface-2:#152138;
  --line:rgba(120,165,225,.16);
  --line-hi:rgba(86,214,255,.45);
  --text:#e9f1fb;
  --muted:#94a7c2;
  --cyan:#33d3ee;
  --cyan-deep:#12b8d6;
  --violet:#8a7dff;
  --gold:#f2c14e;
  --r-lg:16px;
  --r-md:12px;
  --r-sm:8px;
  --shadow:0 12px 30px rgba(2,7,18,.55);
  --shadow-hi:0 22px 48px rgba(2,7,18,.72);
  --container:1180px;
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:'Noto Sans SC',-apple-system,BlinkMacSystemFont,'Segoe UI','PingFang SC','Microsoft YaHei',sans-serif;
  font-size:15px;
  line-height:1.78;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
h1,h2,h3,h4{margin:0;font-weight:800;line-height:1.32;color:var(--text);letter-spacing:-.01em;}
p{margin:0 0 1em;}
ul,ol{margin:0;padding:0;list-style:none;}
img{max-width:100%;display:block;border-radius:var(--r-md);}
a{color:var(--cyan);text-decoration:none;transition:color .2s ease,border-color .2s ease,background .2s ease;}
a:hover{color:#7fe8f9;}
a:focus-visible,button:focus-visible,summary:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:6px;}
button{font-family:inherit;font-size:inherit;cursor:pointer;border:0;background:none;color:inherit;padding:0;}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 22px;}

/* ============ header ============ */
.site-header{position:sticky;top:0;z-index:80;background:rgba(6,10,19,.88);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid var(--line);box-shadow:0 8px 26px rgba(0,0,0,.4);}
.header-inner{display:flex;align-items:center;height:64px;gap:18px;position:relative;}
.brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:900;font-size:16px;letter-spacing:.02em;white-space:nowrap;}
.brand:hover{color:#fff;}
.brand-mark{width:36px;height:36px;border-radius:11px;background:linear-gradient(135deg,var(--cyan),var(--violet));display:grid;place-items:center;color:#04121c;box-shadow:0 0 20px rgba(51,211,238,.38);flex:none;}
.brand-mark svg{width:20px;height:20px;}
.main-nav{display:flex;align-items:center;gap:4px;margin:0 auto;}
.main-nav a{position:relative;padding:8px 14px;border-radius:8px;font-size:14px;font-weight:500;color:var(--muted);transition:color .2s,background .2s;}
.main-nav a:hover{color:#fff;background:rgba(51,211,238,.08);}
.main-nav a.active{color:#fff;background:rgba(51,211,238,.13);}
.main-nav a.active::after{content:"";position:absolute;left:14px;right:14px;bottom:1px;height:2px;border-radius:2px;background:linear-gradient(90deg,var(--cyan),var(--violet));box-shadow:0 0 10px rgba(51,211,238,.75);}
.header-actions{margin-left:auto;display:flex;align-items:center;gap:10px;}
.nav-toggle{display:none;width:40px;height:40px;border-radius:10px;border:1px solid var(--line);align-items:center;justify-content:center;color:var(--text);transition:border-color .2s,background .2s;}
.nav-toggle:hover{border-color:var(--line-hi);background:rgba(51,211,238,.08);}

/* ============ buttons ============ */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:11px 22px;border-radius:var(--r-sm);font-size:14px;font-weight:700;line-height:1;transition:transform .2s ease,box-shadow .2s ease,background .2s ease,border-color .2s ease,color .2s ease;border:1px solid transparent;white-space:nowrap;min-height:42px;}
.btn-primary{background:linear-gradient(135deg,var(--cyan),var(--cyan-deep));color:#03121a;box-shadow:0 8px 22px rgba(51,211,238,.3);}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 14px 30px rgba(51,211,238,.42);color:#03121a;}
.btn-primary:active{transform:translateY(0);box-shadow:0 6px 16px rgba(51,211,238,.3);}
.btn-ghost{background:rgba(255,255,255,.03);border-color:var(--line);color:var(--text);}
.btn-ghost:hover{transform:translateY(-2px);border-color:var(--line-hi);color:#fff;background:rgba(51,211,238,.08);box-shadow:0 10px 24px rgba(2,7,18,.5);}
.btn-sm{padding:8px 16px;min-height:36px;font-size:13px;}

/* ============ article hero ============ */
.article-hero{
  position:relative;
  padding:52px 0 46px;
  overflow:hidden;
  background-image:linear-gradient(105deg,rgba(4,7,14,.97) 0%,rgba(5,9,18,.92) 48%,rgba(8,14,26,.72) 100%),url('/assets/images/ffb5c97f76d3b5be.webp');
  background-size:cover;
  background-position:center;
  border-bottom:1px solid var(--line);
}
.article-hero::before{content:"";position:absolute;left:-140px;top:-160px;width:400px;height:400px;border-radius:50%;background:radial-gradient(circle,rgba(51,211,238,.16),transparent 68%);pointer-events:none;}
.article-hero::after{content:"";position:absolute;right:-120px;bottom:-200px;width:440px;height:440px;border-radius:50%;background:radial-gradient(circle,rgba(138,125,255,.15),transparent 70%);pointer-events:none;}
.article-hero .container{position:relative;z-index:2;}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:12.5px;color:#7f93ae;margin-bottom:20px;}
.breadcrumb a{color:#93a9c4;font-weight:500;}
.breadcrumb a:hover{color:var(--cyan);}
.breadcrumb span.sep{color:#41536c;}
.breadcrumb span.now{color:#c5d6ea;}
.article-tags{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:16px;}
.tag{display:inline-flex;align-items:center;gap:6px;padding:6px 13px;border-radius:999px;font-size:12.5px;font-weight:700;color:#8fe9f8;background:rgba(51,211,238,.09);border:1px solid rgba(51,211,238,.3);letter-spacing:.02em;}
.tag.violet{color:#c3bcfd;background:rgba(138,125,255,.1);border-color:rgba(138,125,255,.3);}
.tag.gold{color:#f7d987;background:rgba(242,193,78,.1);border-color:rgba(242,193,78,.3);}
.article-title{font-size:38px;line-height:1.28;letter-spacing:-.015em;margin-bottom:18px;max-width:960px;}
.article-title em{font-style:normal;background:linear-gradient(120deg,var(--cyan),var(--violet));-webkit-background-clip:text;background-clip:text;color:transparent;}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px 22px;font-size:13px;color:#8ba0bb;}
.article-meta .meta-item{display:inline-flex;align-items:center;gap:7px;}
.article-meta svg{width:15px;height:15px;stroke:var(--cyan);opacity:.85;}
.article-meta .dot{width:4px;height:4px;border-radius:50%;background:#3c4d66;}

/* ============ article shell ============ */
.article-shell{padding:56px 0 24px;}
.article-wrap{max-width:880px;margin:0 auto;}
.article-body{
  font-size:15.5px;
  line-height:1.92;
  color:#c8d7ea;
  background:linear-gradient(170deg,rgba(21,33,56,.55),rgba(10,18,32,.55));
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  padding:36px 38px 30px;
  box-shadow:var(--shadow);
}
.article-body h2{font-size:23px;margin:34px 0 14px;padding-left:14px;position:relative;color:#f2f8ff;}
.article-body h2::before{content:"";position:absolute;left:0;top:6px;bottom:6px;width:4px;border-radius:3px;background:linear-gradient(180deg,var(--cyan),var(--violet));box-shadow:0 0 12px rgba(51,211,238,.5);}
.article-body h3{font-size:18px;margin:26px 0 10px;color:#e6f2ff;}
.article-body h4{font-size:16px;margin:20px 0 8px;color:#dbe9f9;}
.article-body p{margin:0 0 1.15em;}
.article-body a{color:var(--cyan);border-bottom:1px dashed rgba(51,211,238,.45);}
.article-body a:hover{color:#9ef2ff;border-bottom-color:#9ef2ff;}
.article-body strong{color:#fff;font-weight:700;}
.article-body ul,.article-body ol{margin:0 0 1.2em;padding-left:4px;}
.article-body ul li,.article-body ol li{position:relative;padding-left:20px;margin-bottom:9px;line-height:1.85;}
.article-body ul li::before{content:"";position:absolute;left:2px;top:11px;width:7px;height:7px;border-radius:2px;background:var(--cyan);box-shadow:0 0 8px rgba(51,211,238,.6);}
.article-body ol{list-style:decimal;padding-left:22px;}
.article-body ol li{padding-left:4px;}
.article-body ol li::before{display:none;}
.article-body blockquote{margin:22px 0;padding:16px 20px;border-left:3px solid var(--cyan);background:rgba(51,211,238,.06);border-radius:0 var(--r-md) var(--r-md) 0;color:#b9cfe6;}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body img{margin:20px auto;border-radius:var(--r-md);border:1px solid var(--line);}
.article-body table{width:100%;border-collapse:collapse;margin:18px 0;font-size:14px;}
.article-body th,.article-body td{border:1px solid var(--line);padding:10px 12px;text-align:left;}
.article-body th{background:rgba(51,211,238,.08);color:#e8f6ff;font-weight:700;}
.article-body hr{border:0;height:1px;background:var(--line);margin:28px 0;}
.article-empty{
  max-width:680px;margin:0 auto;text-align:center;
  padding:56px 32px;border-radius:var(--r-lg);
  background:linear-gradient(170deg,rgba(21,33,56,.6),rgba(10,18,32,.7));
  border:1px solid var(--line);box-shadow:var(--shadow);
}
.article-empty h2{font-size:24px;margin-bottom:10px;}
.article-empty p{color:var(--muted);font-size:14.5px;margin-bottom:22px;}

/* ============ sections ============ */
.section{padding:68px 0;position:relative;}
.section.alt{background:var(--bg-soft);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.section-head{max-width:760px;margin-bottom:36px;}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center;}
.kicker{display:inline-flex;align-items:center;gap:8px;font-size:12.5px;font-weight:700;letter-spacing:.08em;color:#7fdcf0;text-transform:uppercase;margin-bottom:12px;}
.kicker::before{content:"";width:22px;height:2px;border-radius:2px;background:linear-gradient(90deg,var(--cyan),transparent);}
.section-head h2{font-size:29px;line-height:1.32;margin-bottom:12px;}
.section-head p{color:var(--muted);font-size:14.5px;line-height:1.85;margin:0;}

/* ============ cards ============ */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;}
.card{
  position:relative;
  background:linear-gradient(165deg,rgba(21,33,56,.92),rgba(13,21,36,.95));
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  padding:24px 22px;
  box-shadow:var(--shadow);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hi);border-color:var(--line-hi);}
.card .card-icon{width:42px;height:42px;border-radius:12px;display:grid;place-items:center;background:rgba(51,211,238,.1);border:1px solid rgba(51,211,238,.28);color:var(--cyan);margin-bottom:16px;}
.card .card-icon svg{width:21px;height:21px;}
.card h3{font-size:17px;margin-bottom:10px;}
.card p{font-size:13.8px;line-height:1.82;color:var(--muted);margin:0 0 14px;}
.card p:last-child{margin-bottom:0;}
.card .card-foot{display:flex;flex-wrap:wrap;gap:8px;}
.pill{display:inline-flex;align-items:center;padding:4px 11px;border-radius:999px;font-size:11.5px;font-weight:700;color:#9fb6d1;background:rgba(255,255,255,.04);border:1px solid var(--line);}
.pill.hi{color:#8fe9f8;border-color:rgba(51,211,238,.32);background:rgba(51,211,238,.08);}

/* ============ steps ============ */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;counter-reset:step;}
.step{
  position:relative;padding:26px 22px 24px;border-radius:var(--r-lg);
  background:linear-gradient(165deg,rgba(21,33,56,.9),rgba(13,21,36,.94));
  border:1px solid var(--line);box-shadow:var(--shadow);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.step:hover{transform:translateY(-4px);box-shadow:var(--shadow-hi);border-color:var(--line-hi);}
.step-num{display:inline-flex;align-items:center;justify-content:center;width:38px;height:38px;border-radius:12px;font-size:15px;font-weight:900;color:#03121a;background:linear-gradient(135deg,var(--cyan),var(--violet));box-shadow:0 0 18px rgba(51,211,238,.32);margin-bottom:14px;}
.step h3{font-size:16.5px;margin-bottom:9px;}
.step p{font-size:13.6px;color:var(--muted);line-height:1.82;margin:0;}

/* ============ myth list ============ */
.myth-list{display:grid;gap:14px;}
.myth-item{display:flex;gap:16px;align-items:flex-start;padding:20px 22px;border-radius:var(--r-md);background:rgba(255,255,255,.028);border:1px solid var(--line);transition:border-color .2s ease,background .2s ease,transform .2s ease;}
.myth-item:hover{border-color:rgba(242,193,78,.4);background:rgba(242,193,78,.05);transform:translateX(3px);}
.myth-mark{flex:none;width:28px;height:28px;border-radius:9px;display:grid;place-items:center;background:rgba(242,193,78,.12);border:1px solid rgba(242,193,78,.35);color:var(--gold);}
.myth-mark svg{width:14px;height:14px;}
.myth-body h3{font-size:15.5px;margin-bottom:6px;}
.myth-body p{font-size:13.6px;color:var(--muted);line-height:1.8;margin:0;}

/* ============ faq ============ */
.faq-list{display:grid;gap:12px;max-width:900px;margin:0 auto;}
.faq-item{border:1px solid var(--line);border-radius:var(--r-md);background:rgba(255,255,255,.025);transition:border-color .2s ease,background .2s ease;}
.faq-item[open]{border-color:var(--line-hi);background:rgba(51,211,238,.05);}
.faq-item summary{list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:17px 20px;font-size:15px;font-weight:700;color:#e6f1fd;min-height:44px;}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{content:"";width:12px;height:12px;border-right:2px solid var(--cyan);border-bottom:2px solid var(--cyan);transform:rotate(45deg);transition:transform .25s ease;flex:none;margin-top:-4px;}
.faq-item[open] summary::after{transform:rotate(-135deg);margin-top:4px;}
.faq-item .faq-answer{padding:0 20px 18px;color:var(--muted);font-size:14px;line-height:1.9;}

/* ============ cta band ============ */
.cta-band{
  position:relative;overflow:hidden;
  border-radius:var(--r-lg);
  padding:44px 40px;
  background-image:linear-gradient(110deg,rgba(6,12,24,.96),rgba(12,22,40,.82)),url('/assets/images/e5e78c3fb966ec19.webp');
  background-size:cover;background-position:center;
  border:1px solid var(--line-hi);
  box-shadow:var(--shadow-hi);
}
.cta-band::after{content:"";position:absolute;right:-90px;top:-90px;width:280px;height:280px;border-radius:50%;background:radial-gradient(circle,rgba(51,211,238,.2),transparent 70%);pointer-events:none;}
.cta-inner{position:relative;z-index:2;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:26px;}
.cta-inner h2{font-size:26px;margin-bottom:10px;}
.cta-inner p{color:#a7bcd6;font-size:14.5px;margin:0;max-width:620px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;}

/* ============ read cards ============ */
.read-card{
  display:flex;flex-direction:column;overflow:hidden;
  background:linear-gradient(165deg,rgba(21,33,56,.92),rgba(13,21,36,.96));
  border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:var(--shadow);color:var(--text);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.read-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hi);border-color:var(--line-hi);color:#fff;}
.read-thumb{position:relative;aspect-ratio:16/9;overflow:hidden;border-radius:0;}
.read-thumb img{width:100%;height:100%;object-fit:cover;border-radius:0;transition:transform .35s ease;}
.read-card:hover .read-thumb img{transform:scale(1.05);}
.read-body{padding:18px 20px 22px;}
.read-body h3{font-size:16px;margin-bottom:9px;}
.read-body p{font-size:13.4px;color:var(--muted);line-height:1.8;margin:0;}

/* ============ footer ============ */
.site-footer{background:var(--bg-deep);border-top:1px solid var(--line);padding:54px 0 0;margin-top:0;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:34px;padding-bottom:40px;}
.footer-brand .brand{margin-bottom:14px;}
.footer-brand p{font-size:13.2px;color:#7d90a9;line-height:1.85;margin:0;max-width:320px;}
.footer-col h4{font-size:14px;color:#dbe8f8;margin-bottom:14px;letter-spacing:.02em;}
.footer-col ul{display:grid;gap:9px;}
.footer-col ul li a{font-size:13.2px;color:#8ba0bb;}
.footer-col ul li a:hover{color:var(--cyan);}
.footer-bottom{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px;padding:18px 0 22px;border-top:1px solid var(--line);font-size:12.5px;color:#6d8099;}

/* ============ responsive ============ */
@media (max-width:1024px){
  .article-title{font-size:32px;}
  .grid-3,.steps{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;gap:28px;}
  .footer-brand{grid-column:1/-1;}
  .cta-band{padding:38px 30px;}
}
@media (max-width:900px){
  .main-nav{position:absolute;top:64px;left:0;right:0;display:none;flex-direction:column;align-items:stretch;gap:4px;padding:12px 16px 18px;background:rgba(6,10,19,.985);border-bottom:1px solid var(--line);box-shadow:var(--shadow);margin:0;}
  .main-nav.open{display:flex;}
  .main-nav a{padding:12px 14px;min-height:44px;display:flex;align-items:center;font-size:14.5px;}
  .main-nav a.active::after{display:none;}
  .nav-toggle{display:inline-flex;}
  .header-actions{gap:8px;}
  .article-shell{padding:42px 0 12px;}
  .article-body{padding:28px 22px 22px;font-size:15px;}
  .section{padding:54px 0;}
  .section-head h2{font-size:25px;}
}
@media (max-width:768px){
  .article-title{font-size:27px;line-height:1.34;}
  .article-hero{padding:40px 0 36px;}
  .grid-3,.grid-2,.steps{grid-template-columns:1fr;}
  .cta-inner{flex-direction:column;align-items:flex-start;}
  .footer-grid{grid-template-columns:1fr 1fr;}
  .article-body h2{font-size:20px;}
  .article-body h3{font-size:17px;}
  .section-head h2{font-size:23px;}
}
@media (max-width:520px){
  .container{padding:0 16px;}
  .brand{font-size:14.5px;}
  .brand-mark{width:32px;height:32px;border-radius:10px;}
  .header-actions .btn-sm{display:none;}
  .article-title{font-size:23px;}
  .article-meta{font-size:12.2px;gap:8px 14px;}
  .article-body{padding:22px 16px 18px;line-height:1.85;}
  .cta-band{padding:28px 20px;}
  .cta-inner h2{font-size:21px;}
  .footer-grid{grid-template-columns:1fr;gap:22px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .btn{width:100%;}
  .cta-actions{width:100%;}
}

/* roulang page: category1 */
:root{
  --bg:#060a13;
  --bg-soft:#0a1220;
  --bg-deep:#04070e;
  --surface:#101a2c;
  --surface-2:#152138;
  --line:rgba(120,165,225,.16);
  --line-hi:rgba(86,214,255,.45);
  --text:#e9f1fb;
  --muted:#94a7c2;
  --cyan:#33d3ee;
  --cyan-deep:#12b8d6;
  --violet:#8a7dff;
  --gold:#f2c14e;
  --r-lg:16px;
  --r-md:12px;
  --r-sm:8px;
  --shadow:0 12px 30px rgba(2,7,18,.55);
  --shadow-hi:0 22px 48px rgba(2,7,18,.72);
  --container:1180px;
}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
*,*::before,*::after{box-sizing:border-box;}
body{
  margin:0;
  font-family:'Noto Sans SC',-apple-system,BlinkMacSystemFont,'Segoe UI','PingFang SC','Microsoft YaHei',sans-serif;
  font-size:15px;
  line-height:1.78;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
h1,h2,h3,h4,h5,p,ul,ol,li,figure,blockquote{margin:0;padding:0;}
ul,ol{list-style:none;}
img{max-width:100%;display:block;border-radius:var(--r-md);border:0;}
a{color:var(--cyan);text-decoration:none;transition:color .2s ease;}
a:hover{color:#7fe8f9;}
a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:6px;}
button{font-family:inherit;cursor:pointer;border:0;background:none;color:inherit;}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 22px;}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0;}

/* ===== header ===== */
.site-header{position:sticky;top:0;z-index:80;background:rgba(6,10,19,.9);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid var(--line);box-shadow:0 8px 26px rgba(0,0,0,.42);}
.header-inner{display:flex;align-items:center;height:64px;gap:18px;position:relative;}
.brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:900;font-size:16px;letter-spacing:.02em;white-space:nowrap;}
.brand:hover{color:#fff;}
.brand-mark{width:36px;height:36px;border-radius:11px;background:linear-gradient(135deg,var(--cyan),var(--violet));display:grid;place-items:center;color:#04121c;box-shadow:0 0 20px rgba(51,211,238,.38);flex:none;}
.brand-mark svg{width:20px;height:20px;}
.main-nav{display:flex;align-items:center;gap:4px;margin:0 auto;}
.main-nav a{position:relative;padding:8px 14px;border-radius:8px;font-size:14px;font-weight:500;color:var(--muted);transition:color .2s,background .2s;white-space:nowrap;}
.main-nav a:hover{color:#fff;background:rgba(51,211,238,.08);}
.main-nav a.active{color:#fff;background:rgba(51,211,238,.13);}
.main-nav a.active::after{content:"";position:absolute;left:14px;right:14px;bottom:1px;height:2px;border-radius:2px;background:linear-gradient(90deg,var(--cyan),var(--violet));box-shadow:0 0 10px rgba(51,211,238,.75);}
.header-actions{margin-left:auto;display:flex;align-items:center;gap:10px;}
.nav-toggle{display:none;width:40px;height:40px;border-radius:10px;border:1px solid var(--line);align-items:center;justify-content:center;color:var(--text);transition:border-color .2s,background .2s;}
.nav-toggle:hover{border-color:var(--line-hi);background:rgba(51,211,238,.08);}

/* ===== buttons ===== */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:11px 22px;border-radius:var(--r-sm);font-size:14px;font-weight:700;line-height:1;transition:transform .2s ease,box-shadow .2s ease,background .2s ease,border-color .2s ease,color .2s ease;border:1px solid transparent;white-space:nowrap;min-height:42px;}
.btn-primary{background:linear-gradient(135deg,var(--cyan),var(--cyan-deep));color:#03121a;box-shadow:0 8px 22px rgba(51,211,238,.3);}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 14px 30px rgba(51,211,238,.42);color:#03121a;}
.btn-ghost{background:rgba(255,255,255,.03);border-color:var(--line);color:var(--text);}
.btn-ghost:hover{transform:translateY(-2px);border-color:var(--line-hi);color:#fff;background:rgba(51,211,238,.08);box-shadow:0 10px 24px rgba(2,7,18,.5);}
.btn-sm{padding:8px 16px;min-height:36px;font-size:13px;}

/* ===== hero ===== */
.hero{position:relative;padding:70px 0 78px;overflow:hidden;border-bottom:1px solid var(--line);
  background-image:linear-gradient(105deg,rgba(4,7,14,.97) 0%,rgba(6,11,21,.92) 46%,rgba(8,15,28,.72) 100%),url('/assets/images/ffb5c97f76d3b5be.webp');
  background-size:cover;background-position:center;}
.hero::before{content:"";position:absolute;left:-170px;top:-150px;width:430px;height:430px;border-radius:50%;background:radial-gradient(circle,rgba(51,211,238,.18),transparent 68%);pointer-events:none;}
.hero::after{content:"";position:absolute;right:-140px;bottom:-190px;width:470px;height:470px;border-radius:50%;background:radial-gradient(circle,rgba(138,125,255,.16),transparent 70%);pointer-events:none;}
.hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:start;position:relative;z-index:2;}
.eyebrow{display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:999px;border:1px solid rgba(51,211,238,.35);background:rgba(51,211,238,.08);color:#8fe9f8;font-size:12.5px;font-weight:700;letter-spacing:.06em;margin-bottom:18px;}
.eyebrow svg{width:14px;height:14px;}
.hero h1{font-size:38px;line-height:1.26;margin-bottom:14px;letter-spacing:-.01em;font-weight:900;}
.hero h1 em{font-style:normal;background:linear-gradient(120deg,var(--cyan),var(--violet));-webkit-background-clip:text;background-clip:text;color:transparent;}
.hero-sub{font-size:15.5px;color:#b9cae0;font-weight:500;margin-bottom:14px;}
.hero-desc{font-size:14.5px;color:#93a7c1;line-height:1.85;max-width:580px;margin-bottom:8px;}
.hero-desc + .hero-desc{margin-top:10px;}
.chip-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px;}
.chip{display:inline-flex;align-items:center;gap:6px;padding:7px 14px;border-radius:999px;font-size:12.5px;font-weight:600;color:#a9bed8;background:rgba(255,255,255,.035);border:1px solid var(--line);transition:all .2s ease;}
.chip:hover{color:#fff;border-color:var(--line-hi);background:rgba(51,211,238,.1);}

/* lead form */
.lead-form{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px;padding:18px;border-radius:var(--r-lg);border:1px solid var(--line);background:rgba(16,26,44,.72);box-shadow:var(--shadow);}
.lead-form input{flex:1 1 240px;min-height:44px;padding:0 16px;border-radius:var(--r-sm);border:1px solid var(--line);background:rgba(255,255,255,.04);color:var(--text);font-size:14px;font-family:inherit;}
.lead-form input::placeholder{color:#6d8099;}
.lead-form input:focus{outline:none;border-color:var(--line-hi);box-shadow:0 0 0 3px rgba(51,211,238,.16);}
.form-hint{flex:1 1 100%;font-size:12.5px;color:#7f93ad;margin:0;line-height:1.7;}
.form-hint.ok{color:#74e3c4;}

/* whitepaper aside */
.whitepaper{display:grid;gap:16px;}
.wp-cover{position:relative;border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow-hi);background:var(--surface);}
.wp-cover img{width:100%;height:214px;object-fit:cover;border-radius:0;}
.wp-cover::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(4,7,14,.05) 40%,rgba(4,7,14,.85) 100%);pointer-events:none;}
.wp-badge{position:absolute;left:16px;bottom:14px;z-index:2;display:inline-flex;align-items:center;gap:6px;padding:6px 12px;border-radius:999px;font-size:12px;font-weight:700;color:#04121c;background:linear-gradient(135deg,var(--cyan),var(--cyan-deep));box-shadow:0 8px 18px rgba(51,211,238,.32);}
.wp-toc{padding:20px;border-radius:var(--r-lg);border:1px solid var(--line);background:linear-gradient(160deg,rgba(21,33,56,.94),rgba(13,21,36,.94));box-shadow:var(--shadow);}
.wp-toc h2{font-size:14px;letter-spacing:.04em;color:#a9bed8;margin-bottom:14px;font-weight:700;}
.wp-toc ol{counter-reset:toc;display:grid;gap:10px;}
.wp-toc li{position:relative;padding-left:32px;font-size:13px;color:#c3d3e6;line-height:1.65;counter-increment:toc;}
.wp-toc li::before{content:counter(toc,decimal-leading-zero);position:absolute;left:0;top:1px;font-size:11.5px;font-weight:700;color:var(--cyan);border:1px solid rgba(51,211,238,.3);background:rgba(51,211,238,.08);border-radius:6px;padding:1px 5px;line-height:1.5;}
.wp-toc .btn{margin-top:16px;width:100%;}

/* ===== sections ===== */
.section{padding:66px 0;position:relative;}
.section.alt{background:var(--bg-soft);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.section-head{max-width:740px;margin-bottom:36px;}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center;}
.section-head h2{font-size:27px;line-height:1.34;font-weight:900;letter-spacing:-.01em;position:relative;padding-left:16px;}
.section-head.center h2{padding-left:0;}
.section-head h2::before{content:"";position:absolute;left:0;top:9px;bottom:9px;width:4px;border-radius:4px;background:linear-gradient(180deg,var(--cyan),var(--violet));box-shadow:0 0 12px rgba(51,211,238,.6);}
.section-head.center h2::before{display:none;}
.section-head p{margin-top:12px;font-size:14.5px;color:var(--muted);line-height:1.85;}

/* grids */
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;}

/* cards */
.card{position:relative;padding:24px;border-radius:var(--r-lg);border:1px solid var(--line);background:linear-gradient(160deg,rgba(21,33,56,.92),rgba(12,20,35,.96));box-shadow:var(--shadow);transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hi);border-color:var(--line-hi);}
.card .icon{width:42px;height:42px;border-radius:12px;display:grid;place-items:center;margin-bottom:14px;color:var(--cyan);background:rgba(51,211,238,.1);border:1px solid rgba(51,211,238,.24);}
.card .icon svg{width:20px;height:20px;}
.card h3{font-size:16.5px;font-weight:700;margin-bottom:8px;color:#fff;}
.card p{font-size:13.6px;color:var(--muted);line-height:1.8;}
.card .tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px;}
.tag{display:inline-flex;align-items:center;padding:4px 10px;border-radius:999px;font-size:11.5px;font-weight:600;color:#9fd8e6;background:rgba(51,211,238,.09);border:1px solid rgba(51,211,238,.22);}
.tag.gold{color:#f3d18a;background:rgba(242,193,78,.1);border-color:rgba(242,193,78,.26);}
.tag.violet{color:#bdb4ff;background:rgba(138,125,255,.11);border-color:rgba(138,125,255,.28);}

/* checklist */
.check-wrap{display:grid;grid-template-columns:1.05fr .95fr;gap:26px;align-items:start;}
.check-list{display:grid;gap:12px;}
.check-list li{display:flex;gap:14px;padding:16px 18px;border-radius:var(--r-md);border:1px solid var(--line);background:rgba(16,26,44,.7);transition:border-color .2s,background .2s;}
.check-list li:hover{border-color:var(--line-hi);background:rgba(21,33,56,.9);}
.check-list .num{flex:none;width:26px;height:26px;border-radius:8px;display:grid;place-items:center;font-size:12.5px;font-weight:700;color:#04121c;background:linear-gradient(135deg,var(--cyan),var(--cyan-deep));}
.check-list h4{font-size:14.5px;font-weight:700;margin-bottom:4px;}
.check-list p{font-size:13px;color:var(--muted);line-height:1.75;margin:0;}
.check-figure{border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow);background:var(--surface);}
.check-figure img{width:100%;height:100%;max-height:420px;object-fit:cover;border-radius:0;}
.check-figure figcaption{padding:14px 18px;font-size:12.5px;color:#8fa3bd;border-top:1px solid var(--line);background:rgba(10,18,32,.9);line-height:1.7;}

/* flow */
.flow{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;}
.flow-step{position:relative;padding:24px;border-radius:var(--r-lg);border:1px solid var(--line);background:linear-gradient(160deg,rgba(21,33,56,.94),rgba(11,19,33,.96));box-shadow:var(--shadow);transition:transform .22s,box-shadow .22s,border-color .22s;}
.flow-step:hover{transform:translateY(-4px);border-color:var(--line-hi);box-shadow:var(--shadow-hi);}
.flow-step .step-no{display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;border-radius:10px;font-size:14px;font-weight:900;color:#04121c;background:linear-gradient(135deg,var(--cyan),var(--violet));margin-bottom:14px;box-shadow:0 8px 18px rgba(51,211,238,.28);}
.flow-step h3{font-size:16px;margin-bottom:8px;}
.flow-step p{font-size:13.5px;color:var(--muted);line-height:1.8;}

/* table */
.table-card{border-radius:var(--r-lg);border:1px solid var(--line);background:linear-gradient(160deg,rgba(21,33,56,.92),rgba(12,20,35,.96));box-shadow:var(--shadow);overflow:hidden;}
.table-scroll{overflow-x:auto;}
table.rules-table{width:100%;border-collapse:collapse;min-width:620px;font-size:13.8px;}
table.rules-table th{text-align:left;padding:15px 18px;font-size:12.5px;letter-spacing:.05em;font-weight:700;color:#9fd8e6;background:rgba(51,211,238,.07);border-bottom:1px solid var(--line);white-space:nowrap;}
table.rules-table td{padding:15px 18px;border-bottom:1px solid rgba(120,165,225,.1);color:#c3d3e6;line-height:1.7;}
table.rules-table tbody tr:last-child td{border-bottom:0;}
table.rules-table tbody tr{transition:background .2s;}
table.rules-table tbody tr:hover{background:rgba(51,211,238,.05);}
table.rules-table td strong{color:#fff;font-weight:700;}
.table-note{padding:14px 18px;font-size:12.5px;color:#7f93ad;border-top:1px solid var(--line);background:rgba(10,18,32,.75);line-height:1.7;}

/* myths */
.myth-card{padding:22px;border-radius:var(--r-lg);border:1px solid var(--line);background:rgba(16,26,44,.72);transition:transform .22s,border-color .22s,box-shadow .22s;}
.myth-card:hover{transform:translateY(-3px);border-color:var(--line-hi);box-shadow:var(--shadow);}
.myth-head{display:flex;align-items:flex-start;gap:10px;margin-bottom:10px;}
.myth-head svg{width:18px;height:18px;flex:none;margin-top:4px;color:#ff8f9a;}
.myth-card.fix .myth-head svg{color:#74e3c4;}
.myth-head h3{font-size:15px;font-weight:700;line-height:1.55;color:#fff;}
.myth-card p{font-size:13.4px;color:var(--muted);line-height:1.8;}

/* news list */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;}
.news-card{display:flex;flex-direction:column;gap:10px;padding:22px;border-radius:var(--r-lg);border:1px solid var(--line);background:linear-gradient(160deg,rgba(21,33,56,.9),rgba(12,20,35,.94));box-shadow:var(--shadow);color:var(--text);transition:transform .22s,box-shadow .22s,border-color .22s;}
.news-card:hover{transform:translateY(-4px);border-color:var(--line-hi);box-shadow:var(--shadow-hi);color:#fff;}
.news-card h3{font-size:15.5px;font-weight:700;line-height:1.55;}
.news-card p{font-size:13.2px;color:var(--muted);line-height:1.78;flex:1;}
.news-meta{font-size:12px;color:#7f93ad;display:flex;gap:8px;flex-wrap:wrap;align-items:center;}
.news-meta .dot{width:4px;height:4px;border-radius:50%;background:var(--line-hi);display:inline-block;}
.empty-tip{padding:26px;border-radius:var(--r-md);border:1px dashed var(--line);color:#7f93ad;font-size:13.5px;text-align:center;background:rgba(16,26,44,.5);}

/* faq */
.faq-list{display:grid;gap:12px;max-width:920px;}
.faq-item{border-radius:var(--r-md);border:1px solid var(--line);background:rgba(16,26,44,.66);overflow:hidden;transition:border-color .2s,background .2s;}
.faq-item:hover{border-color:var(--line-hi);background:rgba(21,33,56,.82);}
.faq-item summary{list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:14px;padding:17px 20px;font-size:14.6px;font-weight:700;color:#e6eefa;min-height:48px;}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary .plus{flex:none;width:20px;height:20px;border-radius:6px;border:1px solid rgba(51,211,238,.35);display:grid;place-items:center;color:var(--cyan);font-size:14px;line-height:1;transition:transform .2s;}
.faq-item[open] summary .plus{transform:rotate(45deg);}
.faq-item .faq-body{padding:0 20px 18px;font-size:13.6px;color:var(--muted);line-height:1.85;}

/* cta */
.cta-band{position:relative;padding:44px 38px;border-radius:var(--r-lg);border:1px solid var(--line-hi);overflow:hidden;background-image:linear-gradient(105deg,rgba(8,16,30,.96),rgba(15,26,46,.9)),url('/assets/images/e5e78c3fb966ec19.webp');background-size:cover;background-position:center;box-shadow:var(--shadow-hi);}
.cta-inner{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:24px;position:relative;z-index:2;}
.cta-inner h2{font-size:24px;font-weight:900;margin-bottom:8px;}
.cta-inner p{font-size:14px;color:#a8bcd6;max-width:560px;line-height:1.8;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;}

/* boundary cards */
.boundary-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;margin-top:22px;}
.boundary-card{padding:20px;border-radius:var(--r-md);border:1px solid var(--line);background:rgba(10,18,32,.7);}
.boundary-card h3{font-size:14.5px;margin-bottom:8px;display:flex;align-items:center;gap:8px;}
.boundary-card h3 svg{width:16px;height:16px;color:var(--cyan);}
.boundary-card p{font-size:13px;color:var(--muted);line-height:1.8;}

/* ===== footer ===== */
.site-footer{background:var(--bg-deep);border-top:1px solid var(--line);padding:56px 0 0;margin-top:0;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:34px;padding-bottom:40px;}
.footer-brand .brand{font-size:15.5px;}
.footer-brand p{margin-top:14px;font-size:13px;color:#7f93ad;line-height:1.85;max-width:300px;}
.footer-col h4{font-size:13.5px;font-weight:700;color:#cfdcec;letter-spacing:.05em;margin-bottom:14px;}
.footer-col ul{display:grid;gap:10px;}
.footer-col ul li a{font-size:13px;color:#8fa3bd;transition:color .2s,padding-left .2s;}
.footer-col ul li a:hover{color:var(--cyan);padding-left:3px;}
.footer-bottom{border-top:1px solid var(--line);padding:18px 0;display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;font-size:12.5px;color:#6d8099;}

/* ===== responsive ===== */
@media (max-width:1024px){
  .hero-grid{grid-template-columns:1fr;gap:34px;}
  .hero h1{font-size:33px;}
  .grid-4{grid-template-columns:repeat(2,1fr);}
  .grid-3{grid-template-columns:repeat(2,1fr);}
  .news-grid{grid-template-columns:repeat(2,1fr);}
  .check-wrap{grid-template-columns:1fr;}
  .flow{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
}
@media (max-width:960px){
  .nav-toggle{display:inline-flex;}
  .main-nav{position:absolute;top:calc(100% + 1px);left:-22px;right:-22px;flex-direction:column;align-items:stretch;gap:4px;padding:12px 18px 18px;background:rgba(6,10,19,.985);border-bottom:1px solid var(--line);box-shadow:0 18px 34px rgba(0,0,0,.55);display:none;}
  .main-nav.open{display:flex;}
  .main-nav a{padding:12px 14px;min-height:44px;display:flex;align-items:center;font-size:14.5px;}
  .main-nav a.active::after{display:none;}
  .header-actions .btn{display:none;}
}
@media (max-width:768px){
  .section{padding:52px 0;}
  .hero{padding:54px 0 60px;}
  .hero h1{font-size:28px;}
  .hero-sub{font-size:14.5px;}
  .section-head h2{font-size:23px;}
  .grid-2,.grid-3,.grid-4,.news-grid,.boundary-grid{grid-template-columns:1fr;}
  .lead-form{padding:16px;}
  .lead-form .btn{width:100%;}
  .wp-cover img{height:190px;}
  .cta-band{padding:30px 22px;}
  .cta-inner h2{font-size:21px;}
  .footer-grid{grid-template-columns:1fr;gap:26px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}
@media (max-width:520px){
  .container{padding:0 16px;}
  .main-nav{left:-16px;right:-16px;}
  .hero h1{font-size:24.5px;}
  .brand-name{font-size:14px;}
  .card,.flow-step,.news-card{padding:18px;}
  .section-head h2{font-size:21px;}
  .check-list li{padding:14px;}
  .faq-item summary{padding:15px 16px;font-size:14px;}
}

/* roulang page: category2 */
:root{
 --bg:#060a13;
 --bg-soft:#0a1220;
 --bg-deep:#04070e;
 --surface:#101a2c;
 --surface-2:#152138;
 --line:rgba(120,165,225,.16);
 --line-hi:rgba(86,214,255,.45);
 --text:#e9f1fb;
 --muted:#94a7c2;
 --cyan:#33d3ee;
 --cyan-deep:#12b8d6;
 --violet:#8a7dff;
 --gold:#f2c14e;
 --r-lg:16px;
 --r-md:12px;
 --r-sm:8px;
 --shadow:0 12px 30px rgba(2,7,18,.55);
 --shadow-hi:0 22px 48px rgba(2,7,18,.72);
 --container:1180px;
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
 margin:0;
 font-family:'Noto Sans SC',-apple-system,BlinkMacSystemFont,'Segoe UI','PingFang SC','Microsoft YaHei',sans-serif;
 font-size:15px;
 line-height:1.78;
 color:var(--text);
 background:var(--bg);
 -webkit-font-smoothing:antialiased;
 overflow-x:hidden;
}
img{max-width:100%;display:block;border-radius:var(--r-md);}
a{color:var(--cyan);text-decoration:none;transition:color .2s ease;}
a:hover{color:#7fe8f9;}
a:focus-visible,button:focus-visible,summary:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:6px;}
button{font-family:inherit;cursor:pointer;border:0;background:none;color:inherit;}
h1,h2,h3,h4{margin:0;font-weight:900;letter-spacing:-.01em;color:#fff;}
p{margin:0;}
ul{margin:0;}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 22px;}
/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:80;background:rgba(6,10,19,.88);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid var(--line);box-shadow:0 8px 26px rgba(0,0,0,.4);}
.header-inner{display:flex;align-items:center;height:64px;gap:18px;position:relative;}
.brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:900;font-size:16px;letter-spacing:.02em;white-space:nowrap;}
.brand:hover{color:#fff;}
.brand-mark{width:36px;height:36px;border-radius:11px;background:linear-gradient(135deg,var(--cyan),var(--violet));display:grid;place-items:center;color:#04121c;box-shadow:0 0 20px rgba(51,211,238,.38);flex:none;}
.brand-mark svg{width:20px;height:20px;}
.main-nav{display:flex;align-items:center;gap:4px;margin:0 auto;}
.main-nav a{position:relative;padding:8px 14px;border-radius:8px;font-size:14px;font-weight:500;color:var(--muted);transition:color .2s,background .2s;}
.main-nav a:hover{color:#fff;background:rgba(51,211,238,.08);}
.main-nav a.active{color:#fff;background:rgba(51,211,238,.13);}
.main-nav a.active::after{content:"";position:absolute;left:14px;right:14px;bottom:1px;height:2px;border-radius:2px;background:linear-gradient(90deg,var(--cyan),var(--violet));box-shadow:0 0 10px rgba(51,211,238,.75);}
.header-actions{margin-left:auto;display:flex;align-items:center;gap:10px;}
.nav-toggle{display:none;width:40px;height:40px;border-radius:10px;border:1px solid var(--line);align-items:center;justify-content:center;color:var(--text);background:rgba(255,255,255,.03);}
.nav-toggle:hover{border-color:var(--line-hi);color:#fff;}
/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:11px 22px;border-radius:var(--r-sm);font-size:14px;font-weight:700;line-height:1;transition:transform .2s ease,box-shadow .2s ease,background .2s ease,border-color .2s ease,color .2s ease;border:1px solid transparent;white-space:nowrap;min-height:42px;}
.btn-primary{background:linear-gradient(135deg,var(--cyan),var(--cyan-deep));color:#03121a;box-shadow:0 8px 22px rgba(51,211,238,.3);}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 14px 30px rgba(51,211,238,.42);color:#03121a;}
.btn-ghost{background:rgba(255,255,255,.03);border-color:var(--line);color:var(--text);}
.btn-ghost:hover{transform:translateY(-2px);border-color:var(--line-hi);color:#fff;background:rgba(51,211,238,.08);box-shadow:0 10px 24px rgba(2,7,18,.5);}
.btn-sm{padding:8px 16px;min-height:36px;font-size:13px;}
/* ---------- hero ---------- */
.hero{position:relative;padding:70px 0 78px;overflow:hidden;background-image:linear-gradient(100deg,rgba(4,7,14,.97) 0%,rgba(5,9,18,.92) 46%,rgba(6,12,24,.7) 100%),url('/assets/images/ffb5c97f76d3b5be.webp');background-size:cover;background-position:center;border-bottom:1px solid var(--line);}
.hero::before{content:"";position:absolute;left:-160px;top:-140px;width:420px;height:420px;border-radius:50%;background:radial-gradient(circle,rgba(51,211,238,.18),transparent 68%);pointer-events:none;}
.hero::after{content:"";position:absolute;right:-120px;bottom:-180px;width:460px;height:460px;border-radius:50%;background:radial-gradient(circle,rgba(138,125,255,.16),transparent 70%);pointer-events:none;}
.hero-grid{display:grid;grid-template-columns:1.08fr .92fr;gap:48px;align-items:start;position:relative;z-index:2;}
.eyebrow{display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:999px;border:1px solid rgba(51,211,238,.35);background:rgba(51,211,238,.08);color:#8fe9f8;font-size:12.5px;font-weight:700;letter-spacing:.06em;margin-bottom:18px;}
.eyebrow svg{width:14px;height:14px;}
.hero h1{font-size:40px;line-height:1.26;margin-bottom:16px;}
.hero h1 em{font-style:normal;background:linear-gradient(120deg,var(--cyan),var(--violet));-webkit-background-clip:text;background-clip:text;color:transparent;}
.hero-sub{font-size:16px;color:#b9cae0;font-weight:500;margin-bottom:12px;}
.hero-desc{font-size:14.5px;color:#93a7c1;line-height:1.85;max-width:580px;margin-bottom:24px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:22px;}
.chip-row{display:flex;flex-wrap:wrap;gap:10px;}
.chip{display:inline-flex;align-items:center;gap:6px;padding:7px 14px;border-radius:999px;font-size:12.5px;font-weight:600;color:#a9bed8;background:rgba(255,255,255,.035);border:1px solid var(--line);transition:all .2s ease;}
.chip:hover{color:#fff;border-color:var(--line-hi);background:rgba(51,211,238,.1);}
/* hero checklist panel */
.check-panel{background:linear-gradient(165deg,rgba(21,33,56,.94),rgba(10,17,30,.96));border:1px solid var(--line);border-radius:var(--r-lg);padding:26px 24px;box-shadow:var(--shadow-hi);}
.check-panel h2{font-size:17px;margin-bottom:6px;}
.check-panel .panel-note{font-size:12.5px;color:var(--muted);margin-bottom:18px;}
.check-list{list-style:none;padding:0;margin:0;display:grid;gap:12px;}
.check-list li{display:flex;gap:11px;align-items:flex-start;padding:11px 13px;border-radius:var(--r-md);background:rgba(255,255,255,.028);border:1px solid rgba(120,165,225,.12);transition:border-color .2s ease,background .2s ease;}
.check-list li:hover{border-color:var(--line-hi);background:rgba(51,211,238,.07);}
.check-ico{width:20px;height:20px;flex:none;border-radius:6px;background:rgba(51,211,238,.16);color:var(--cyan);display:grid;place-items:center;margin-top:2px;}
.check-ico svg{width:13px;height:13px;}
.check-list strong{display:block;font-size:13.5px;color:#fff;font-weight:700;}
.check-list span{display:block;font-size:12.5px;color:var(--muted);line-height:1.65;}
.panel-foot{margin-top:16px;padding-top:14px;border-top:1px dashed rgba(120,165,225,.2);font-size:12.5px;color:#7f93ad;}
/* ---------- sections ---------- */
.section{padding:70px 0;position:relative;}
.section.alt{background:var(--bg-soft);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.section-head{max-width:780px;margin-bottom:34px;}
.section-head .kicker{display:inline-flex;align-items:center;gap:9px;font-size:12.5px;font-weight:700;letter-spacing:.1em;color:#7fdcee;margin-bottom:10px;}
.section-head .kicker::before{content:"";width:22px;height:2px;border-radius:2px;background:linear-gradient(90deg,var(--cyan),var(--violet));box-shadow:0 0 8px rgba(51,211,238,.7);}
.section-head h2{font-size:28px;line-height:1.34;margin-bottom:12px;}
.section-head p{font-size:14.5px;color:var(--muted);line-height:1.85;}
/* grids */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:22px;}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;}
/* tier cards */
.pcard{position:relative;display:flex;flex-direction:column;background:linear-gradient(160deg,rgba(21,33,56,.9),rgba(11,19,33,.95));border:1px solid var(--line);border-radius:var(--r-lg);padding:26px 22px;box-shadow:var(--shadow);transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;}
.pcard:hover{transform:translateY(-4px);box-shadow:var(--shadow-hi);border-color:var(--line-hi);}
.pcard .tier-badge{display:inline-flex;align-items:center;gap:7px;align-self:flex-start;padding:5px 12px;border-radius:999px;font-size:12px;font-weight:700;color:#04121c;background:linear-gradient(135deg,var(--cyan),var(--violet));margin-bottom:14px;}
.pcard h3{font-size:17.5px;margin-bottom:8px;}
.pcard .tier-rate{font-size:22px;font-weight:900;color:var(--gold);letter-spacing:.01em;margin-bottom:10px;}
.pcard p{font-size:13.5px;color:var(--muted);line-height:1.8;margin-bottom:16px;}
.tag-row{margin-top:auto;display:flex;flex-wrap:wrap;gap:7px;}
.tag{display:inline-block;padding:3px 10px;border-radius:999px;font-size:12px;font-weight:600;color:#9adcf0;background:rgba(51,211,238,.1);border:1px solid rgba(51,211,238,.25);}
/* rule strip */
.rule-strip{margin-top:26px;display:grid;grid-template-columns:repeat(3,1fr);gap:16px;}
.rule-item{display:flex;gap:12px;align-items:flex-start;padding:16px 18px;border-radius:var(--r-md);background:rgba(51,211,238,.055);border:1px solid rgba(51,211,238,.18);}
.rule-item .dot{width:8px;height:8px;border-radius:50%;background:var(--cyan);box-shadow:0 0 10px rgba(51,211,238,.9);margin-top:9px;flex:none;}
.rule-item p{font-size:13.5px;color:#b7c9de;line-height:1.75;}
.rule-item strong{color:#fff;}
/* steps */
.step-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;}
.step{position:relative;padding:26px 20px 22px;border-radius:var(--r-lg);background:var(--surface);border:1px solid var(--line);box-shadow:var(--shadow);transition:transform .2s ease,border-color .2s ease,box-shadow .2s ease;}
.step:hover{transform:translateY(-4px);border-color:var(--line-hi);box-shadow:var(--shadow-hi);}
.step-num{font-size:26px;font-weight:900;line-height:1;background:linear-gradient(120deg,var(--cyan),var(--violet));-webkit-background-clip:text;background-clip:text;color:transparent;margin-bottom:12px;display:block;}
.step h3{font-size:15.5px;margin-bottom:8px;}
.step p{font-size:13px;color:var(--muted);line-height:1.8;}
/* fix list */
.fix-list{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;}
.fix-item{display:grid;grid-template-columns:1fr auto 1fr;gap:14px;align-items:center;padding:20px;border-radius:var(--r-md);background:rgba(255,255,255,.026);border:1px solid var(--line);transition:border-color .2s ease,background .2s ease;}
.fix-item:hover{border-color:var(--line-hi);background:rgba(51,211,238,.06);}
.fix-wrong{font-size:13.5px;color:#f0a6a6;line-height:1.7;}
.fix-wrong b{display:block;font-size:12px;letter-spacing:.08em;color:#c98f8f;font-weight:700;margin-bottom:5px;}
.fix-right{font-size:13.5px;color:#a9e6d5;line-height:1.7;}
.fix-right b{display:block;font-size:12px;letter-spacing:.08em;color:#7fc9b6;font-weight:700;margin-bottom:5px;}
.fix-arrow{color:var(--cyan);display:grid;place-items:center;}
.fix-arrow svg{width:18px;height:18px;}
/* scene cards */
.scene-card{overflow:hidden;border-radius:var(--r-lg);background:var(--surface);border:1px solid var(--line);box-shadow:var(--shadow);transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;}
.scene-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hi);border-color:var(--line-hi);}
.scene-thumb{position:relative;aspect-ratio:16/9;overflow:hidden;}
.scene-thumb img{width:100%;height:100%;object-fit:cover;border-radius:0;transition:transform .35s ease;}
.scene-card:hover .scene-thumb img{transform:scale(1.04);}
.scene-thumb::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(4,7,14,.05),rgba(4,7,14,.72));}
.scene-body{padding:20px 20px 22px;}
.scene-body h3{font-size:16px;margin-bottom:8px;}
.scene-body p{font-size:13.3px;color:var(--muted);line-height:1.8;margin-bottom:12px;}
/* stats */
.stat-band{background:linear-gradient(120deg,rgba(18,30,52,.9),rgba(9,15,27,.94));border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.stat{text-align:left;padding:22px 20px;border-radius:var(--r-md);background:rgba(255,255,255,.03);border:1px solid var(--line);transition:border-color .2s ease,transform .2s ease;}
.stat:hover{border-color:var(--line-hi);transform:translateY(-3px);}
.stat .num{font-size:30px;font-weight:900;line-height:1.1;background:linear-gradient(120deg,var(--cyan),var(--violet));-webkit-background-clip:text;background-clip:text;color:transparent;}
.stat .num small{font-size:14px;font-weight:700;margin-left:3px;color:#8fe9f8;-webkit-text-fill-color:#8fe9f8;}
.stat .lbl{font-size:13.5px;color:#c6d5e8;font-weight:700;margin-top:8px;}
.stat .sub{font-size:12.5px;color:var(--muted);margin-top:4px;line-height:1.7;}
/* faq */
.faq-list{display:grid;gap:12px;max-width:900px;}
.faq-item{border-radius:var(--r-md);background:rgba(255,255,255,.028);border:1px solid var(--line);overflow:hidden;transition:border-color .2s ease,background .2s ease;}
.faq-item[open]{border-color:var(--line-hi);background:rgba(51,211,238,.055);}
.faq-item summary{list-style:none;cursor:pointer;padding:17px 48px 17px 20px;font-size:14.5px;font-weight:700;color:#fff;position:relative;min-height:44px;display:flex;align-items:center;}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{content:"+";position:absolute;right:18px;top:50%;transform:translateY(-50%);font-size:20px;font-weight:400;color:var(--cyan);line-height:1;}
.faq-item[open] summary::after{content:"–";}
.faq-item .faq-body{padding:0 20px 18px;font-size:13.5px;color:var(--muted);line-height:1.85;}
/* news list */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.news-card{display:flex;flex-direction:column;padding:22px 20px;border-radius:var(--r-lg);background:var(--surface);border:1px solid var(--line);box-shadow:var(--shadow);color:var(--text);transition:transform .2s ease,border-color .2s ease,box-shadow .2s ease;}
.news-card:hover{transform:translateY(-4px);border-color:var(--line-hi);box-shadow:var(--shadow-hi);color:#fff;}
.news-tag{align-self:flex-start;padding:3px 10px;border-radius:999px;font-size:11.5px;font-weight:700;color:#8fe9f8;background:rgba(51,211,238,.1);border:1px solid rgba(51,211,238,.24);margin-bottom:12px;}
.news-card h3{font-size:15.5px;line-height:1.55;margin-bottom:8px;}
.news-card p{font-size:13px;color:var(--muted);line-height:1.8;margin-bottom:14px;}
.news-meta{margin-top:auto;font-size:12px;color:#6d8099;letter-spacing:.02em;}
.empty-tip{padding:26px 22px;border-radius:var(--r-md);border:1px dashed var(--line);color:var(--muted);font-size:13.5px;background:rgba(255,255,255,.02);}
/* cta band */
.cta-band{position:relative;overflow:hidden;padding:66px 0;background-image:linear-gradient(105deg,rgba(4,7,14,.96),rgba(7,13,24,.86)),url('/assets/images/e5e78c3fb966ec19.webp');background-size:cover;background-position:center;border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.cta-inner{display:grid;grid-template-columns:1.15fr .85fr;gap:40px;align-items:center;position:relative;z-index:2;}
.cta-inner h2{font-size:27px;line-height:1.36;margin-bottom:12px;}
.cta-inner p{font-size:14px;color:#a3b6cd;line-height:1.85;margin-bottom:22px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;}
.bound-box{padding:24px 22px;border-radius:var(--r-lg);background:rgba(16,26,44,.86);border:1px solid var(--line);box-shadow:var(--shadow);}
.bound-box h3{font-size:15px;margin-bottom:12px;}
.bound-box ul{list-style:none;padding:0;margin:0;display:grid;gap:9px;}
.bound-box li{position:relative;padding-left:18px;font-size:13px;color:var(--muted);line-height:1.75;}
.bound-box li::before{content:"";position:absolute;left:0;top:8px;width:6px;height:6px;border-radius:50%;background:linear-gradient(135deg,var(--cyan),var(--violet));}
/* ---------- footer ---------- */
.site-footer{background:var(--bg-deep);border-top:1px solid var(--line);padding:56px 0 24px;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:34px;}
.footer-brand p{color:var(--muted);font-size:13px;line-height:1.8;margin-top:14px;max-width:320px;}
.footer-col h4{font-size:13.5px;color:#fff;margin-bottom:13px;letter-spacing:.04em;}
.footer-col ul{list-style:none;padding:0;margin:0;display:grid;gap:9px;}
.footer-col a{color:var(--muted);font-size:13px;}
.footer-col a:hover{color:var(--cyan);}
.footer-bottom{border-top:1px solid var(--line);margin-top:36px;padding-top:18px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;font-size:12.5px;color:#6d8099;}
/* ---------- responsive ---------- */
@media (max-width:1080px){
 .hero h1{font-size:35px;}
 .hero-grid{gap:32px;}
 .grid-4{grid-template-columns:repeat(2,1fr);}
 .step-grid{grid-template-columns:repeat(2,1fr);}
 .footer-grid{grid-template-columns:1fr 1fr;}
}
@media (max-width:900px){
 .main-nav{position:absolute;top:64px;left:0;right:0;margin:0;flex-direction:column;align-items:stretch;gap:4px;padding:12px 16px 16px;background:rgba(8,14,26,.985);border-bottom:1px solid var(--line);box-shadow:var(--shadow-hi);display:none;}
 .main-nav.open{display:flex;}
 .main-nav a{padding:12px 14px;font-size:14.5px;}
 .main-nav a.active::after{left:14px;right:auto;width:26px;bottom:6px;}
 .nav-toggle{display:inline-flex;}
 .hero{padding:52px 0 60px;}
 .hero-grid{grid-template-columns:1fr;gap:30px;}
 .hero h1{font-size:31px;}
 .grid-3,.grid-2,.news-grid,.fix-list{grid-template-columns:1fr;}
 .rule-strip{grid-template-columns:1fr;}
 .cta-inner{grid-template-columns:1fr;gap:26px;}
 .section{padding:56px 0;}
 .section-head h2{font-size:24px;}
}
@media (max-width:520px){
 .container{padding:0 16px;}
 .hero h1{font-size:27px;line-height:1.3;}
 .hero-sub{font-size:14.5px;}
 .hero-actions .btn{width:100%;}
 .grid-4,.step-grid{grid-template-columns:1fr;}
 .brand-name{font-size:14.5px;}
 .footer-grid{grid-template-columns:1fr;gap:26px;}
 .fix-item{grid-template-columns:1fr;gap:10px;}
 .fix-arrow{transform:rotate(90deg);}
 .section-head h2{font-size:21px;}
 .stat .num{font-size:26px;}
}

/* roulang page: category3 */
:root{
  --bg:#060a13;
  --bg-soft:#0a1220;
  --bg-deep:#04070e;
  --surface:#101a2c;
  --surface-2:#152138;
  --line:rgba(120,165,225,.16);
  --line-hi:rgba(86,214,255,.45);
  --text:#e9f1fb;
  --muted:#94a7c2;
  --cyan:#33d3ee;
  --cyan-deep:#12b8d6;
  --violet:#8a7dff;
  --gold:#f2c14e;
  --r-lg:16px;
  --r-md:12px;
  --r-sm:8px;
  --shadow:0 12px 30px rgba(2,7,18,.55);
  --shadow-hi:0 22px 48px rgba(2,7,18,.72);
  --container:1180px;
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:'Noto Sans SC',-apple-system,BlinkMacSystemFont,'Segoe UI','PingFang SC','Microsoft YaHei',sans-serif;
  font-size:15px;
  line-height:1.78;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
h1,h2,h3,h4,h5,p,ul,ol,dl,dd,figure{margin:0;}
ul,ol{padding-left:1.15em;}
img{max-width:100%;display:block;border-radius:var(--r-md);border:0;}
a{color:var(--cyan);text-decoration:none;transition:color .2s ease;}
a:hover{color:#7fe8f9;}
a:focus-visible,button:focus-visible,summary:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:6px;}
button{font-family:inherit;cursor:pointer;border:0;background:none;color:inherit;}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 22px;}
/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:80;background:rgba(6,10,19,.88);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid var(--line);box-shadow:0 8px 26px rgba(0,0,0,.4);}
.header-inner{display:flex;align-items:center;height:64px;gap:18px;position:relative;}
.brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:900;font-size:16px;letter-spacing:.02em;white-space:nowrap;}
.brand:hover{color:#fff;}
.brand-mark{width:36px;height:36px;border-radius:11px;background:linear-gradient(135deg,var(--cyan),var(--violet));display:grid;place-items:center;color:#04121c;box-shadow:0 0 20px rgba(51,211,238,.38);flex:none;}
.brand-mark svg{width:20px;height:20px;}
.main-nav{display:flex;align-items:center;gap:4px;margin:0 auto;padding:0;}
.main-nav a{position:relative;padding:8px 14px;border-radius:8px;font-size:14px;font-weight:500;color:var(--muted);transition:color .2s,background .2s;list-style:none;}
.main-nav a:hover{color:#fff;background:rgba(51,211,238,.08);}
.main-nav a.active{color:#fff;background:rgba(51,211,238,.13);}
.main-nav a.active::after{content:"";position:absolute;left:14px;right:14px;bottom:1px;height:2px;border-radius:2px;background:linear-gradient(90deg,var(--cyan),var(--violet));box-shadow:0 0 10px rgba(51,211,238,.75);}
.header-actions{margin-left:auto;display:flex;align-items:center;gap:10px;}
.nav-toggle{display:none;width:40px;height:40px;border-radius:10px;border:1px solid var(--line);align-items:center;justify-content:center;color:var(--text);background:rgba(255,255,255,.02);}
.nav-toggle:hover{border-color:var(--line-hi);color:#fff;}
/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:11px 22px;border-radius:var(--r-sm);font-size:14px;font-weight:700;line-height:1;transition:transform .2s ease,box-shadow .2s ease,background .2s ease,border-color .2s ease,color .2s ease;border:1px solid transparent;white-space:nowrap;min-height:42px;}
.btn-primary{background:linear-gradient(135deg,var(--cyan),var(--cyan-deep));color:#03121a;box-shadow:0 8px 22px rgba(51,211,238,.3);}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 14px 30px rgba(51,211,238,.42);color:#03121a;}
.btn-ghost{background:rgba(255,255,255,.03);border-color:var(--line);color:var(--text);}
.btn-ghost:hover{transform:translateY(-2px);border-color:var(--line-hi);color:#fff;background:rgba(51,211,238,.08);box-shadow:0 10px 24px rgba(2,7,18,.5);}
.btn-sm{padding:8px 16px;min-height:36px;font-size:13px;}
.btn-block{width:100%;}
/* ---------- hero ---------- */
.hero{position:relative;padding:70px 0 78px;overflow:hidden;background-image:linear-gradient(100deg,rgba(4,7,14,.97) 0%,rgba(5,9,18,.92) 44%,rgba(6,12,24,.68) 100%),url('/assets/images/ffb5c97f76d3b5be.webp');background-size:cover;background-position:center;border-bottom:1px solid var(--line);}
.hero::before{content:"";position:absolute;left:-160px;top:-140px;width:420px;height:420px;border-radius:50%;background:radial-gradient(circle,rgba(51,211,238,.18),transparent 68%);pointer-events:none;}
.hero::after{content:"";position:absolute;right:-120px;bottom:-180px;width:460px;height:460px;border-radius:50%;background:radial-gradient(circle,rgba(138,125,255,.16),transparent 70%);pointer-events:none;}
.hero-grid{display:grid;grid-template-columns:1.08fr .92fr;gap:48px;align-items:center;position:relative;z-index:2;}
.eyebrow{display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:999px;border:1px solid rgba(51,211,238,.35);background:rgba(51,211,238,.08);color:#8fe9f8;font-size:12.5px;font-weight:700;letter-spacing:.06em;margin-bottom:20px;}
.eyebrow svg{width:14px;height:14px;}
.hero h1{font-size:40px;line-height:1.26;margin-bottom:16px;letter-spacing:-.01em;font-weight:900;}
.hero h1 em{font-style:normal;background:linear-gradient(120deg,var(--cyan),var(--violet));-webkit-background-clip:text;background-clip:text;color:transparent;}
.hero-sub{font-size:16px;color:#b9cae0;font-weight:500;margin-bottom:14px;}
.hero-desc{font-size:14.5px;color:#93a7c1;line-height:1.85;max-width:560px;margin-bottom:26px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:24px;}
.chip-row{display:flex;flex-wrap:wrap;gap:10px;}
.chip{display:inline-flex;align-items:center;gap:6px;padding:7px 14px;border-radius:999px;font-size:12.5px;font-weight:600;color:#a9bed8;background:rgba(255,255,255,.035);border:1px solid var(--line);transition:all .2s ease;}
.chip:hover{color:#fff;border-color:var(--line-hi);background:rgba(51,211,238,.1);}
.hero-panel{background:linear-gradient(160deg,rgba(21,33,56,.94),rgba(11,18,32,.96));border:1px solid var(--line);border-radius:var(--r-lg);padding:26px 24px;box-shadow:var(--shadow-hi);}
.panel-head{display:flex;align-items:center;gap:9px;font-size:13px;font-weight:700;color:#9fe9f7;letter-spacing:.04em;margin-bottom:18px;}
.panel-head .dot{width:8px;height:8px;border-radius:50%;background:var(--cyan);box-shadow:0 0 12px var(--cyan);flex:none;}
.spec-list{display:grid;gap:0;margin-bottom:18px;}
.spec-list>div{display:flex;align-items:baseline;justify-content:space-between;gap:16px;padding:11px 0;border-bottom:1px dashed rgba(120,165,225,.16);}
.spec-list>div:first-child{padding-top:0;}
.spec-list dt{font-size:13px;color:var(--muted);font-weight:500;}
.spec-list dd{font-size:13.5px;color:#fff;font-weight:700;text-align:right;margin:0;}
.panel-note{font-size:12.5px;line-height:1.75;color:#8b9fb9;background:rgba(51,211,238,.05);border-left:2px solid rgba(51,211,238,.5);padding:10px 12px;border-radius:0 var(--r-sm) var(--r-sm) 0;margin-bottom:20px;}
/* ---------- sections ---------- */
.section{padding:70px 0;position:relative;}
.section.alt{background:var(--bg-soft);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.section-head{max-width:760px;margin-bottom:38px;}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center;}
.kicker{display:inline-flex;align-items:center;gap:8px;font-size:12.5px;font-weight:700;letter-spacing:.12em;color:var(--cyan);text-transform:uppercase;margin-bottom:12px;}
.kicker::before{content:"";width:22px;height:2px;border-radius:2px;background:linear-gradient(90deg,var(--cyan),var(--violet));}
.section-head.center .kicker{justify-content:center;}
.section-head.center .kicker::after{content:"";width:22px;height:2px;border-radius:2px;background:linear-gradient(90deg,var(--violet),var(--cyan));}
.section-title{font-size:28px;line-height:1.36;font-weight:900;letter-spacing:-.01em;margin-bottom:12px;}
.section-title em{font-style:normal;color:var(--cyan);}
.section-desc{font-size:14.5px;color:var(--muted);line-height:1.82;max-width:720px;}
/* ---------- grids & cards ---------- */
.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px;}
.grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px;}
.card{position:relative;display:flex;flex-direction:column;padding:24px 22px;border-radius:var(--r-lg);background:linear-gradient(165deg,rgba(21,33,56,.86),rgba(13,21,36,.92));border:1px solid var(--line);box-shadow:var(--shadow);transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hi);border-color:var(--line-hi);}
.card-icon{width:44px;height:44px;border-radius:12px;display:grid;place-items:center;background:rgba(51,211,238,.1);border:1px solid rgba(51,211,238,.28);color:var(--cyan);margin-bottom:16px;flex:none;}
.card-icon svg{width:22px;height:22px;}
.card h3{font-size:16.5px;font-weight:700;margin-bottom:9px;color:#fff;line-height:1.5;}
.card p{font-size:14px;color:var(--muted);line-height:1.8;margin-bottom:16px;}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:auto;}
.tag{display:inline-flex;align-items:center;padding:4px 11px;border-radius:999px;font-size:12px;font-weight:600;color:#9fe9f7;background:rgba(51,211,238,.09);border:1px solid rgba(51,211,238,.24);}
.tag.tag-gold{color:#f7d98c;background:rgba(242,193,78,.1);border-color:rgba(242,193,78,.28);}
.tag.tag-violet{color:#c2bbff;background:rgba(138,125,255,.11);border-color:rgba(138,125,255,.3);}
.version-num{font-size:12.5px;font-weight:700;letter-spacing:.1em;color:#8ba3c0;margin-bottom:8px;}
/* ---------- split ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:center;}
.split-media{position:relative;border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow-hi);}
.split-media img{width:100%;height:100%;object-fit:cover;border-radius:0;aspect-ratio:16/11;}
.split-media::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(4,7,14,0) 45%,rgba(4,7,14,.55) 100%);pointer-events:none;}
/* ---------- feature list ---------- */
.feature-list{display:grid;gap:16px;margin-top:6px;list-style:none;padding:0;}
.feature-list li{display:flex;gap:14px;padding:16px 18px;border-radius:var(--r-md);background:rgba(255,255,255,.025);border:1px solid var(--line);transition:border-color .2s,background .2s,transform .2s;}
.feature-list li:hover{border-color:var(--line-hi);background:rgba(51,211,238,.05);transform:translateY(-2px);}
.feature-list .fi{width:34px;height:34px;border-radius:10px;flex:none;display:grid;place-items:center;background:rgba(138,125,255,.12);border:1px solid rgba(138,125,255,.3);color:#c2bbff;}
.feature-list .fi svg{width:17px;height:17px;}
.feature-list h4{font-size:14.5px;font-weight:700;color:#fff;margin-bottom:4px;}
.feature-list p{font-size:13.5px;color:var(--muted);line-height:1.78;margin:0;}
/* ---------- steps ---------- */
.step-list{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px;list-style:none;padding:0;counter-reset:step;}
.step-list li{position:relative;padding:26px 20px 22px;border-radius:var(--r-lg);background:linear-gradient(170deg,rgba(21,33,56,.9),rgba(11,18,32,.94));border:1px solid var(--line);box-shadow:var(--shadow);transition:transform .22s ease,border-color .22s ease,box-shadow .22s ease;}
.step-list li:hover{transform:translateY(-4px);border-color:var(--line-hi);box-shadow:var(--shadow-hi);}
.step-no{display:inline-flex;align-items:center;justify-content:center;width:38px;height:38px;border-radius:11px;font-size:14px;font-weight:900;color:#03121a;background:linear-gradient(135deg,var(--cyan),var(--cyan-deep));box-shadow:0 8px 18px rgba(51,211,238,.3);margin-bottom:14px;}
.step-list h3{font-size:15.5px;font-weight:700;color:#fff;margin-bottom:8px;}
.step-list p{font-size:13.5px;color:var(--muted);line-height:1.78;margin:0;}
/* ---------- check list ---------- */
.check-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;}
.check-item{display:flex;gap:14px;padding:20px;border-radius:var(--r-md);background:rgba(255,255,255,.025);border:1px solid var(--line);transition:border-color .2s,transform .2s,background .2s;}
.check-item:hover{border-color:var(--line-hi);background:rgba(51,211,238,.05);transform:translateY(-2px);}
.check-item .mark{width:30px;height:30px;flex:none;border-radius:9px;display:grid;place-items:center;color:#03121a;background:linear-gradient(135deg,var(--cyan),var(--violet));font-weight:900;font-size:13px;}
.check-item h4{font-size:14.5px;font-weight:700;color:#fff;margin-bottom:5px;}
.check-item p{font-size:13.5px;color:var(--muted);line-height:1.78;margin:0;}
/* ---------- notice strip ---------- */
.notice{margin-top:24px;display:flex;gap:14px;align-items:flex-start;padding:18px 20px;border-radius:var(--r-md);background:rgba(242,193,78,.06);border:1px solid rgba(242,193,78,.26);}
.notice svg{width:20px;height:20px;flex:none;color:var(--gold);margin-top:3px;}
.notice p{font-size:13.5px;color:#d9c9a2;line-height:1.8;margin:0;}
/* ---------- faq ---------- */
.faq-list{display:grid;gap:14px;max-width:920px;margin:0 auto;}
.faq-item{background:linear-gradient(160deg,rgba(21,33,56,.82),rgba(13,21,36,.9));border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden;transition:border-color .2s,box-shadow .2s;}
.faq-item summary{list-style:none;cursor:pointer;padding:18px 56px 18px 20px;font-weight:700;font-size:15px;position:relative;color:#fff;line-height:1.6;}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{content:"+";position:absolute;right:20px;top:50%;transform:translateY(-50%);font-size:20px;font-weight:400;color:var(--cyan);line-height:1;}
.faq-item[open] summary::after{content:"–";}
.faq-item:hover{border-color:var(--line-hi);}
.faq-item[open]{border-color:var(--line-hi);box-shadow:var(--shadow);}
.faq-item p{padding:0 20px 20px;margin:0;color:var(--muted);font-size:14px;line-height:1.82;}
/* ---------- cta ---------- */
.cta-band{position:relative;padding:64px 0;background-image:linear-gradient(100deg,rgba(4,7,14,.95),rgba(6,12,24,.82)),url('/assets/images/e5e78c3fb966ec19.webp');background-size:cover;background-position:center;border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;}
.cta-inner h2{font-size:26px;font-weight:900;margin-bottom:10px;line-height:1.4;}
.cta-inner p{font-size:14.5px;color:var(--muted);max-width:620px;line-height:1.8;margin:0;}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap;}
/* ---------- footer ---------- */
.site-footer{background:var(--bg-deep);border-top:1px solid var(--line);padding:56px 0 26px;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:36px;padding-bottom:36px;border-bottom:1px solid var(--line);}
.footer-brand .brand{font-size:15.5px;margin-bottom:14px;}
.footer-brand p{font-size:13.5px;color:var(--muted);line-height:1.8;max-width:320px;margin:0;}
.footer-col h4{font-size:14px;font-weight:700;color:#fff;margin-bottom:14px;letter-spacing:.02em;}
.footer-col ul{list-style:none;padding:0;margin:0;display:grid;gap:9px;}
.footer-col ul li a{font-size:13.5px;color:var(--muted);}
.footer-col ul li a:hover{color:var(--cyan);}
.footer-bottom{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;padding-top:24px;font-size:12.5px;color:#6d8099;}
/* ---------- responsive ---------- */
@media (max-width:1024px){
  .hero-grid{gap:34px;}
  .hero h1{font-size:34px;}
  .grid-3{grid-template-columns:repeat(2,minmax(0,1fr));}
  .step-list{grid-template-columns:repeat(2,minmax(0,1fr));}
  .split{gap:30px;}
  .footer-grid{grid-template-columns:1fr 1fr;}
}
@media (max-width:900px){
  .nav-toggle{display:inline-flex;}
  .main-nav{position:absolute;top:64px;left:0;right:0;flex-direction:column;align-items:stretch;gap:2px;margin:0;padding:10px 16px 16px;background:rgba(6,10,19,.985);border-bottom:1px solid var(--line);box-shadow:0 20px 32px rgba(0,0,0,.55);display:none;}
  .main-nav.open{display:flex;}
  .main-nav a{padding:13px 14px;font-size:14.5px;}
  .main-nav a.active::after{display:none;}
  .header-actions .btn{display:none;}
  .hero{padding:52px 0 58px;}
  .hero-grid{grid-template-columns:1fr;}
  .hero-panel{max-width:520px;}
  .split{grid-template-columns:1fr;}
  .split-media{order:-1;}
  .cta-inner{flex-direction:column;align-items:flex-start;}
}
@media (max-width:768px){
  .section{padding:52px 0;}
  .section-title{font-size:23px;}
  .hero h1{font-size:29px;}
  .grid-3,.grid-2,.check-grid,.step-list{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;gap:26px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px;}
}
@media (max-width:520px){
  .container{padding:0 16px;}
  .hero h1{font-size:25px;line-height:1.34;}
  .hero-sub{font-size:14.5px;}
  .section-title{font-size:21px;}
  .btn{width:100%;}
  .hero-actions .btn{width:100%;}
  .brand-name{font-size:14.5px;}
  .card,.hero-panel{padding:20px 16px;}
  .faq-item summary{font-size:14px;padding-right:48px;}
}