/* roulang page: index */
:root{
  --bg-0:#030712;
  --bg-1:#081229;
  --bg-2:#0a1730;
  --blue:#2563eb;
  --blue-2:#3b82f6;
  --cyan:#38bdf8;
  --holo:#60a5fa;
  --text:#f8fafc;
  --muted:#94a3b8;
  --line:rgba(96,165,250,.18);
  --line-strong:rgba(56,189,248,.42);
  --glass:linear-gradient(160deg,rgba(56,189,248,.10),rgba(8,18,41,.72));
  --radius:20px;
  --radius-sm:14px;
  --radius-xs:10px;
  --shadow:0 20px 50px rgba(2,6,23,.55);
  --glow:0 0 24px rgba(37,99,235,.45);
  --glow-cyan:0 0 30px rgba(56,189,248,.35);
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:'Be Vietnam Pro',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;
  font-size:16px;
  line-height:1.65;
  color:var(--text);
  background:var(--bg-0);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background-image:
    linear-gradient(rgba(56,189,248,.045) 1px,transparent 1px),
    linear-gradient(90deg,rgba(56,189,248,.045) 1px,transparent 1px);
  background-size:72px 72px;
  mask-image:radial-gradient(80% 70% at 50% 0%,#000 10%,transparent 85%);
  -webkit-mask-image:radial-gradient(80% 70% at 50% 0%,#000 10%,transparent 85%);
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none;transition:color .2s ease}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.25;letter-spacing:-.015em}
p{margin:0}
strong{font-weight:700}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:8px}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px;position:relative;z-index:1}
main{position:relative;z-index:1}

/* ---------- HEADER ---------- */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:120;
  background:rgba(3,7,18,.82);
  backdrop-filter:blur(18px);
  -webkit-backdrop-filter:blur(18px);
  border-bottom:1px solid var(--line);
}
.header-inner{display:flex;align-items:center;gap:20px;min-height:74px}
.brand{display:flex;align-items:center;gap:12px;flex-shrink:0}
.brand-mark{
  width:42px;height:42px;flex:0 0 42px;
  display:grid;place-items:center;
  border-radius:14px;
  font-size:19px;
  background:linear-gradient(135deg,rgba(37,99,235,.9),rgba(56,189,248,.85));
  box-shadow:var(--glow);
}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text strong{font-size:15px;font-weight:700;letter-spacing:-.01em}
.brand-text small{font-size:11px;color:var(--muted);letter-spacing:.02em}
.main-nav{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav-link{
  padding:9px 14px;
  border-radius:999px;
  font-size:14px;
  font-weight:500;
  color:var(--muted);
  white-space:nowrap;
  border:1px solid transparent;
  transition:.22s ease;
}
.nav-link:hover{color:var(--text);background:rgba(56,189,248,.08);border-color:var(--line)}
.nav-link.is-active{color:var(--text);background:rgba(37,99,235,.2);border-color:var(--line-strong);box-shadow:0 0 18px rgba(37,99,235,.28)}
.header-actions{display:flex;align-items:center;gap:10px;flex-shrink:0}
.nav-toggle{
  display:none;
  width:44px;height:44px;
  border-radius:12px;
  border:1px solid var(--line);
  background:rgba(56,189,248,.06);
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:5px;
}
.nav-toggle span{display:block;width:20px;height:2px;background:var(--cyan);border-radius:2px;transition:.2s}

/* ---------- BUTTONS ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 24px;
  border-radius:999px;
  font-size:15px;font-weight:600;
  border:1px solid transparent;
  transition:transform .22s ease,box-shadow .22s ease,background .22s ease,color .22s ease;
  cursor:pointer;
  white-space:nowrap;
}
.btn-primary{
  background:linear-gradient(135deg,var(--blue),var(--cyan));
  color:#02101f;
  box-shadow:var(--glow);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 0 36px rgba(56,189,248,.6)}
.btn-primary:active{transform:translateY(0);box-shadow:0 0 14px rgba(37,99,235,.5)}
.btn-outline{
  border-color:var(--line-strong);
  color:var(--holo);
  background:rgba(37,99,235,.08);
}
.btn-outline:hover{background:rgba(37,99,235,.2);color:#fff;box-shadow:0 0 22px rgba(37,99,235,.35)}
.btn-ghost{color:var(--muted);border-color:transparent}
.btn-ghost:hover{color:var(--text);background:rgba(148,163,184,.1)}
.btn-sm{padding:9px 16px;font-size:13.5px}
.btn-lg{padding:15px 30px;font-size:16px}
.btn-block{width:100%}

/* ---------- PILLS / EYEBROW ---------- */
.pill{
  display:inline-flex;align-items:center;gap:8px;
  padding:8px 16px;
  border-radius:999px;
  font-size:12.5px;font-weight:600;letter-spacing:.05em;text-transform:uppercase;
  color:var(--cyan);
  background:rgba(56,189,248,.09);
  border:1px solid var(--line-strong);
}
.eyebrow{
  display:inline-block;
  font-size:12.5px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;
  color:var(--cyan);
  margin-bottom:14px;
}
.tag{
  display:inline-block;
  padding:4px 11px;
  border-radius:999px;
  font-size:11.5px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;
  background:rgba(56,189,248,.12);
  color:var(--cyan);
  border:1px solid var(--line);
}
.tag-warm{background:rgba(250,204,21,.12);color:#fde68a;border-color:rgba(250,204,21,.3)}
.tag-live{background:rgba(16,185,129,.14);color:#6ee7b7;border-color:rgba(16,185,129,.32)}

/* ---------- HERO ---------- */
.hero{
  position:relative;
  padding:130px 0 90px;
  overflow:hidden;
  isolation:isolate;
  text-align:center;
}
.hero-media{position:absolute;inset:0;z-index:-1}
.hero-media img{width:100%;height:100%;object-fit:cover;opacity:.38}
.hero-mask{
  position:absolute;inset:0;
  background:
    radial-gradient(75% 60% at 50% 18%,rgba(37,99,235,.4),transparent 70%),
    linear-gradient(180deg,rgba(3,7,18,.86) 0%,rgba(3,7,18,.93) 55%,var(--bg-0) 100%);
}
.hero-grid{
  position:absolute;inset:0;
  background-image:
    linear-gradient(rgba(56,189,248,.08) 1px,transparent 1px),
    linear-gradient(90deg,rgba(56,189,248,.08) 1px,transparent 1px);
  background-size:60px 60px;
  mask-image:radial-gradient(60% 60% at 50% 35%,#000,transparent);
  -webkit-mask-image:radial-gradient(60% 60% at 50% 35%,#000,transparent);
}
.hero-inner{max-width:960px;margin:0 auto}
.hero h1{
  margin:22px 0 20px;
  font-size:clamp(28px,4.4vw,50px);
  font-weight:800;
  letter-spacing:-.02em;
  background:linear-gradient(120deg,#ffffff 20%,#93c5fd 55%,#38bdf8 90%);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}
.hero-lead{
  max-width:780px;
  margin:0 auto 30px;
  font-size:17px;
  color:#cbd5e1;
  line-height:1.7;
}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;justify-content:center;margin-bottom:34px}
.play-wrap{display:flex;justify-content:center;margin-bottom:42px}
.play-btn{
  display:inline-flex;align-items:center;gap:14px;
  padding:12px 26px 12px 12px;
  border-radius:999px;
  background:var(--glass);
  border:1px solid var(--line-strong);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  box-shadow:var(--glow-cyan);
  font-size:14.5px;font-weight:600;
  transition:.25s ease;
}
.play-btn:hover{transform:translateY(-2px);box-shadow:0 0 40px rgba(56,189,248,.5)}
.play-icon{
  width:46px;height:46px;flex:0 0 46px;
  border-radius:50%;
  display:grid;place-items:center;
  background:linear-gradient(135deg,var(--blue),var(--cyan));
  color:#02101f;
  position:relative;
}
.play-icon::after{
  content:"";
  position:absolute;inset:-6px;
  border-radius:50%;
  border:1px solid rgba(56,189,248,.5);
  animation:pulseRing 2.6s infinite ease-out;
}
@keyframes pulseRing{
  0%{transform:scale(.9);opacity:.9}
  70%{transform:scale(1.25);opacity:0}
  100%{transform:scale(1.25);opacity:0}
}
.hero-stats{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:16px;
  max-width:820px;
  margin:0 auto;
}
.hero-stats li{
  padding:18px 16px;
  border-radius:var(--radius-sm);
  background:var(--glass);
  border:1px solid var(--line);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  text-align:left;
}
.hero-stats strong{display:block;font-size:24px;font-weight:800;color:#fff;letter-spacing:-.02em}
.hero-stats span{font-size:12.5px;color:var(--muted);line-height:1.45;display:block;margin-top:4px}

/* ---------- SECTIONS ---------- */
.section{padding:86px 0;position:relative}
.section-alt{background:linear-gradient(180deg,rgba(8,18,41,.72),rgba(3,7,18,.25))}
.section-deep{background:linear-gradient(180deg,rgba(3,7,18,.4),rgba(10,23,48,.8),rgba(3,7,18,.4))}
.section-head{max-width:800px;margin-bottom:46px}
.section-head h2{font-size:clamp(23px,3vw,36px);margin-bottom:14px}
.section-head p{color:var(--muted);font-size:16px;line-height:1.7}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}

/* ---------- GRIDS ---------- */
.grid{display:grid;gap:20px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.grid-6{grid-template-columns:repeat(3,1fr)}

/* ---------- GLASS CARD ---------- */
.glass{
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:var(--radius);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  box-shadow:var(--shadow);
}
.card{
  padding:26px;
  border-radius:var(--radius);
  background:var(--glass);
  border:1px solid var(--line);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.card:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:0 0 34px rgba(37,99,235,.28)}
.card h3{font-size:18px;margin-bottom:10px}
.card p{color:var(--muted);font-size:14.5px;line-height:1.65}
.card-icon{
  width:46px;height:46px;
  display:grid;place-items:center;
  border-radius:14px;
  margin-bottom:16px;
  font-size:20px;
  background:rgba(37,99,235,.18);
  border:1px solid var(--line);
}

/* ---------- METRICS ---------- */
.metrics-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.metric{
  padding:28px 24px;
  border-radius:var(--radius);
  background:var(--glass);
  border:1px solid var(--line);
  position:relative;
  overflow:hidden;
}
.metric::after{
  content:"";
  position:absolute;top:0;left:0;width:100%;height:2px;
  background:linear-gradient(90deg,var(--blue),var(--cyan),transparent);
}
.metric strong{
  display:block;
  font-size:clamp(28px,3.4vw,40px);
  font-weight:800;
  letter-spacing:-.03em;
  background:linear-gradient(120deg,#fff,#38bdf8);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.metric span{display:block;margin-top:8px;font-size:13.5px;color:var(--muted);line-height:1.55}

/* ---------- FORMULA BLOCKS ---------- */
.formula-block{
  display:grid;
  grid-template-columns:0.95fr 1.05fr;
  gap:0;
  border-radius:var(--radius);
  overflow:hidden;
  border:1px solid var(--line);
  background:var(--glass);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  margin-bottom:26px;
}
.formula-block:nth-child(even){grid-template-columns:1.05fr .95fr}
.formula-media{position:relative;min-height:260px}
.formula-media img{width:100%;height:100%;object-fit:cover;position:absolute;inset:0;opacity:.85}
.formula-media::after{
  content:"";
  position:absolute;inset:0;
  background:linear-gradient(120deg,rgba(3,7,18,.75),rgba(3,7,18,.15));
}
.formula-body{padding:34px 32px;display:flex;flex-direction:column;justify-content:center}
.formula-body h3{font-size:clamp(18px,2.2vw,23px);margin:12px 0 14px}
.formula-body p{color:var(--muted);font-size:15px;line-height:1.7;margin-bottom:16px}
.formula-points{display:flex;flex-wrap:wrap;gap:10px}
.formula-points li{
  font-size:13px;color:var(--holo);
  padding:7px 13px;border-radius:999px;
  background:rgba(37,99,235,.12);
  border:1px solid var(--line);
}

/* ---------- ROADMAP TOOL ---------- */
.roadmap-panel{
  display:grid;grid-template-columns:1.15fr .85fr;gap:26px;align-items:center;
  padding:32px;border-radius:var(--radius);
  background:var(--glass);border:1px solid var(--line);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
}
.roadmap-panel h3{font-size:22px;margin-bottom:12px}
.roadmap-panel p{color:var(--muted);font-size:15px;line-height:1.7;margin-bottom:18px}
.roadmap-list li{
  display:flex;gap:12px;align-items:flex-start;
  padding:12px 0;border-bottom:1px dashed rgba(148,163,184,.2);
  font-size:14.5px;color:#cbd5e1;
}
.roadmap-list li:last-child{border-bottom:0}
.roadmap-list b{color:var(--cyan);font-weight:700;min-width:88px;display:inline-block}

/* ---------- PROGRESS / IN PROGRESS ---------- */
.progress-item{padding:20px 22px;border-radius:var(--radius-sm);background:rgba(8,18,41,.6);border:1px solid var(--line);margin-bottom:14px}
.progress-top{display:flex;justify-content:space-between;gap:14px;align-items:center;margin-bottom:12px}
.progress-top strong{font-size:15.5px}
.progress-top em{font-style:normal;font-size:13px;color:var(--cyan);font-weight:700}
.progress{height:8px;border-radius:99px;background:rgba(148,163,184,.16);overflow:hidden}
.progress span{display:block;height:100%;border-radius:99px;background:linear-gradient(90deg,var(--blue),var(--cyan));box-shadow:0 0 16px rgba(56,189,248,.65)}
.progress-item p{margin-top:10px;font-size:13.5px;color:var(--muted)}

/* ---------- COMPARE ---------- */
.compare{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.compare-col{padding:30px;border-radius:var(--radius);border:1px solid var(--line);background:rgba(8,18,41,.55)}
.compare-col.is-good{background:var(--glass);border-color:var(--line-strong);box-shadow:0 0 34px rgba(37,99,235,.22)}
.compare-col h3{font-size:19px;margin-bottom:18px;display:flex;align-items:center;gap:10px}
.compare-col li{display:flex;gap:11px;align-items:flex-start;padding:9px 0;font-size:14.5px;color:#cbd5e1;line-height:1.6}
.mark{flex:0 0 22px;width:22px;height:22px;border-radius:50%;display:grid;place-items:center;font-size:12px;font-weight:700;margin-top:2px}
.mark-bad{background:rgba(239,68,68,.16);color:#fca5a5}
.mark-good{background:rgba(56,189,248,.2);color:#7dd3fc}

/* ---------- TIMELINE ---------- */
.timeline{position:relative;padding-left:28px}
.timeline::before{content:"";position:absolute;left:7px;top:6px;bottom:6px;width:2px;background:linear-gradient(180deg,var(--cyan),rgba(37,99,235,.15))}
.timeline li{position:relative;padding:0 0 28px 22px}
.timeline li:last-child{padding-bottom:0}
.timeline li::before{
  content:"";position:absolute;left:-28px;top:6px;
  width:16px;height:16px;border-radius:50%;
  background:var(--bg-0);
  border:2px solid var(--cyan);
  box-shadow:0 0 14px rgba(56,189,248,.7);
}
.timeline h3{font-size:17px;margin-bottom:6px}
.timeline p{color:var(--muted);font-size:14.5px}
.timeline span.stage{font-size:12px;color:var(--cyan);font-weight:700;letter-spacing:.08em;text-transform:uppercase;display:block;margin-bottom:6px}

/* ---------- CATEGORY MATRIX ---------- */
.cat-card{
  display:block;
  border-radius:var(--radius);
  overflow:hidden;
  border:1px solid var(--line);
  background:rgba(8,18,41,.6);
  transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.cat-card:hover{transform:translateY(-5px);border-color:var(--line-strong);box-shadow:0 0 34px rgba(37,99,235,.3)}
.cat-thumb{position:relative;aspect-ratio:16/10;overflow:hidden}
.cat-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.cat-card:hover .cat-thumb img{transform:scale(1.06)}
.cat-thumb::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(3,7,18,.05),rgba(3,7,18,.85))}
.cat-body{padding:22px}
.cat-body h3{font-size:17.5px;margin-bottom:10px}
.cat-body p{color:var(--muted);font-size:14px;line-height:1.65;margin-bottom:14px}
.cat-link{font-size:13.5px;font-weight:700;color:var(--cyan);display:inline-flex;align-items:center;gap:6px}

/* ---------- QUOTES ---------- */
.quote{padding:26px;border-radius:var(--radius);background:var(--glass);border:1px solid var(--line);display:flex;flex-direction:column;gap:16px}
.quote p{font-size:14.5px;color:#cbd5e1;line-height:1.7}
.quote-user{display:flex;align-items:center;gap:12px;margin-top:auto}
.avatar{width:42px;height:42px;border-radius:50%;display:grid;place-items:center;font-weight:700;font-size:15px;color:#02101f;background:linear-gradient(135deg,var(--blue-2),var(--cyan))}
.quote-user strong{display:block;font-size:14.5px}
.quote-user span{font-size:12.5px;color:var(--muted)}

/* ---------- MYTHS ---------- */
.myth{display:grid;grid-template-columns:auto 1fr;gap:16px;padding:20px 22px;border-radius:var(--radius-sm);border:1px solid var(--line);background:rgba(8,18,41,.55);margin-bottom:14px}
.myth .num{width:34px;height:34px;border-radius:11px;display:grid;place-items:center;font-weight:700;font-size:14px;background:rgba(37,99,235,.18);color:var(--cyan);border:1px solid var(--line)}
.myth h3{font-size:16px;margin-bottom:6px}
.myth p{font-size:14px;color:var(--muted);line-height:1.65}
.myth p b{color:#7dd3fc}

/* ---------- SCENARIOS ---------- */
.scene{padding:24px;border-radius:var(--radius);border:1px solid var(--line);background:rgba(8,18,41,.5);transition:.25s ease}
.scene:hover{border-color:var(--line-strong);background:rgba(10,23,48,.75)}
.scene h3{font-size:16.5px;margin:12px 0 10px}
.scene p{font-size:14px;color:var(--muted);line-height:1.65}

/* ---------- NEWS (CMS) ---------- */
.news-layout{display:grid;grid-template-columns:1.6fr 1fr;gap:28px;align-items:start}
.news-item{
  display:grid;grid-template-columns:132px 1fr;gap:18px;
  padding:16px;border-radius:var(--radius-sm);
  border:1px solid var(--line);
  background:rgba(8,18,41,.5);
  margin-bottom:14px;
  transition:.25s ease;
}
.news-item:hover{border-color:var(--line-strong);background:rgba(10,23,48,.8);transform:translateX(4px)}
.news-thumb{display:block;border-radius:var(--radius-xs);overflow:hidden;aspect-ratio:4/3}
.news-thumb img{width:100%;height:100%;object-fit:cover}
.news-body{display:flex;flex-direction:column;gap:7px;min-width:0}
.news-meta{display:flex;gap:12px;flex-wrap:wrap;font-size:12px;color:var(--muted)}
.news-meta em{font-style:normal;color:var(--cyan);font-weight:600}
.news-body strong{font-size:15.5px;line-height:1.45}
.news-desc{font-size:13.5px;color:var(--muted);line-height:1.6}
.news-side{padding:24px;border-radius:var(--radius);background:var(--glass);border:1px solid var(--line)}
.news-side h3{font-size:16.5px;margin-bottom:16px;padding-bottom:14px;border-bottom:1px solid var(--line)}
.side-item{display:block;padding:12px 0;border-bottom:1px dashed rgba(148,163,184,.2)}
.side-item:last-child{border-bottom:0}
.side-item strong{display:block;font-size:14.5px;line-height:1.5;margin-bottom:5px}
.side-item span{font-size:12.5px;color:var(--muted)}
.side-item:hover strong{color:var(--cyan)}
.news-more{margin-top:26px}
.empty-note{padding:26px;border-radius:var(--radius-sm);border:1px dashed var(--line-strong);color:var(--muted);font-size:14.5px;text-align:center}

/* ---------- CHANGELOG ---------- */
.log-item{display:grid;grid-template-columns:110px 1fr;gap:20px;padding:20px 0;border-bottom:1px solid rgba(148,163,184,.14)}
.log-item:last-child{border-bottom:0}
.log-date{font-size:13px;color:var(--cyan);font-weight:700;letter-spacing:.04em}
.log-item h3{font-size:16px;margin-bottom:6px}
.log-item p{font-size:14px;color:var(--muted)}

/* ---------- ASSURANCE ---------- */
.assure{padding:22px;border-radius:var(--radius-sm);background:rgba(8,18,41,.6);border:1px solid var(--line);display:flex;gap:14px;align-items:flex-start}
.assure .ic{flex:0 0 40px;width:40px;height:40px;border-radius:12px;display:grid;place-items:center;background:rgba(37,99,235,.2);border:1px solid var(--line);font-size:17px}
.assure h3{font-size:15.5px;margin-bottom:6px}
.assure p{font-size:13.5px;color:var(--muted);line-height:1.6}
.pay-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
.pay-badge{
  padding:11px 20px;border-radius:12px;
  font-size:13.5px;font-weight:700;letter-spacing:.02em;
  background:rgba(56,189,248,.08);
  border:1px solid var(--line-strong);
  color:#bae6fd;
}
.badge-18{
  display:inline-grid;place-items:center;
  width:42px;height:42px;border-radius:50%;
  border:2px solid var(--cyan);color:var(--cyan);
  font-size:13px;font-weight:800;
}

/* ---------- FAQ ---------- */
.faq-item{border:1px solid var(--line);border-radius:var(--radius-sm);background:rgba(8,18,41,.5);margin-bottom:12px;overflow:hidden;transition:border-color .2s ease}
.faq-item[open]{border-color:var(--line-strong);background:rgba(10,23,48,.75)}
.faq-item summary{
  list-style:none;cursor:pointer;
  padding:19px 22px;
  font-size:15.5px;font-weight:600;
  display:flex;justify-content:space-between;gap:18px;align-items:center;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";font-size:20px;color:var(--cyan);font-weight:400;line-height:1}
.faq-item[open] summary::after{content:"–"}
.faq-item p{padding:0 22px 20px;font-size:14.5px;color:var(--muted);line-height:1.7}

/* ---------- CTA FORM ---------- */
.cta-wrap{
  display:grid;grid-template-columns:1fr 1fr;gap:34px;align-items:center;
  padding:38px;border-radius:var(--radius);
  background:var(--glass);border:1px solid var(--line-strong);
  backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  box-shadow:0 0 48px rgba(37,99,235,.22);
}
.cta-wrap h2{font-size:clamp(22px,2.8vw,32px);margin-bottom:14px}
.cta-wrap p{color:var(--muted);font-size:15px;line-height:1.7;margin-bottom:18px}
.cta-points li{display:flex;gap:10px;align-items:flex-start;font-size:14.5px;color:#cbd5e1;padding:7px 0}
.cta-points li::before{content:"✓";color:var(--cyan);font-weight:800}
.form-field{margin-bottom:14px}
.form-field label{display:block;font-size:13px;color:var(--muted);margin-bottom:7px;font-weight:600}
.form-field input,.form-field select{
  width:100%;
  padding:13px 16px;
  border-radius:var(--radius-xs);
  background:rgba(3,7,18,.65);
  border:1px solid var(--line);
  color:var(--text);
  font-family:inherit;
  font-size:14.5px;
  transition:.2s ease;
}
.form-field input:focus,.form-field select:focus{outline:none;border-color:var(--cyan);box-shadow:0 0 0 3px rgba(56,189,248,.18)}
.form-note{font-size:12.5px;color:var(--muted);margin-top:12px;line-height:1.6}
.form-note.is-visible{color:#6ee7b7}
.form-pay{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}
.form-pay span{font-size:12px;padding:6px 12px;border-radius:999px;background:rgba(56,189,248,.08);border:1px solid var(--line);color:#bae6fd}

/* ---------- MODAL ---------- */
.modal{position:fixed;inset:0;z-index:200;display:none;place-items:center;padding:24px;background:rgba(2,6,23,.85);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px)}
.modal.is-open{display:grid}
.modal-box{width:100%;max-width:760px;border-radius:var(--radius);overflow:hidden;border:1px solid var(--line-strong);background:var(--bg-1);box-shadow:0 30px 80px rgba(2,6,23,.8)}
.modal-media{position:relative;aspect-ratio:16/9}
.modal-media img{width:100%;height:100%;object-fit:cover;opacity:.6}
.modal-media::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(3,7,18,.35),rgba(3,7,18,.9))}
.modal-play{position:absolute;inset:0;display:grid;place-items:center;z-index:2}
.modal-play .play-icon{width:64px;height:64px;flex:0 0 64px}
.modal-body{padding:26px 28px}
.modal-body h3{font-size:20px;margin-bottom:10px}
.modal-body p{color:var(--muted);font-size:14.5px;line-height:1.7;margin-bottom:18px}
.modal-close{position:absolute;top:14px;right:14px;z-index:3;width:38px;height:38px;border-radius:50%;background:rgba(3,7,18,.75);border:1px solid var(--line);font-size:17px;color:var(--text)}
.modal-close:hover{border-color:var(--cyan);color:var(--cyan)}

/* ---------- FAB ---------- */
.fab{
  position:fixed;left:16px;bottom:96px;z-index:50;
  display:inline-flex;align-items:center;gap:10px;
  min-width:56px;min-height:56px;
  padding:9px 18px 9px 10px;
  border-radius:999px;
  background:rgba(7,7,13,.82);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border:1px solid transparent;
  background-image:linear-gradient(rgba(7,7,13,.85),rgba(7,7,13,.85)),linear-gradient(135deg,var(--cyan),var(--blue));
  background-origin:border-box;
  background-clip:padding-box,border-box;
  box-shadow:0 0 22px rgba(6,182,212,.45);
  opacity:.78;
  transition:opacity .25s ease,box-shadow .25s ease,transform .25s ease;
}
.fab:hover{opacity:1;box-shadow:0 0 34px rgba(56,189,248,.7);transform:translateY(-2px)}
.fab:active{transform:scale(.96)}
.fab-ic{width:38px;height:38px;flex:0 0 38px;border-radius:50%;display:grid;place-items:center;background:rgba(37,99,235,.28);color:var(--cyan)}
.fab-label{font-size:13px;font-weight:700;color:#e0f2fe;white-space:nowrap}
.fab-dot{position:absolute;top:6px;right:10px;width:11px;height:11px;border-radius:50%;background:#22d3ee;box-shadow:0 0 0 2px rgba(3,7,18,.9);animation:blink 1.6s infinite}
@keyframes blink{0%,100%{opacity:1}50%{opacity:.25}}

/* ---------- FOOTER ---------- */
.site-footer{position:relative;z-index:1;margin-top:20px;border-top:1px solid var(--line);background:linear-gradient(180deg,rgba(3,7,18,.6),rgba(8,18,41,.95))}
.footer-top{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:32px;padding:56px 24px 40px}
.footer-brand p{color:var(--muted);font-size:14px;line-height:1.7;margin:18px 0 20px;max-width:340px}
.badge-row{display:flex;flex-wrap:wrap;gap:9px}
.badge{font-size:11.5px;font-weight:700;letter-spacing:.05em;padding:7px 13px;border-radius:999px;border:1px solid var(--line);color:#bae6fd;background:rgba(56,189,248,.07)}
.footer-col h4{font-size:14px;margin-bottom:16px;color:#e2e8f0;letter-spacing:.02em}
.footer-col li{font-size:13.5px;color:var(--muted);padding:6px 0}
.footer-col a:hover{color:var(--cyan)}
.footer-bottom{display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;padding:20px 24px 30px;border-top:1px solid rgba(148,163,184,.14);font-size:12.5px;color:var(--muted)}

/* ---------- RESPONSIVE ---------- */
@media (max-width:1100px){
  .footer-top{grid-template-columns:1fr 1fr;gap:28px}
  .grid-6{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:1023px){
  .nav-toggle{display:flex}
  .main-nav{
    position:absolute;top:100%;left:0;right:0;
    flex-direction:column;align-items:stretch;
    gap:4px;padding:16px 20px 22px;
    background:rgba(4,10,24,.98);
    border-bottom:1px solid var(--line);
    backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
    display:none;
  }
  .main-nav.is-open{display:flex}
  .nav-link{padding:12px 14px;font-size:14.5px}
  .header-inner{min-height:68px;gap:12px}
  .hero{padding:112px 0 72px}
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .metrics-grid{grid-template-columns:repeat(2,1fr)}
  .formula-block,.formula-block:nth-child(even){grid-template-columns:1fr}
  .formula-media{min-height:220px}
  .roadmap-panel{grid-template-columns:1fr}
  .news-layout{grid-template-columns:1fr}
  .cta-wrap{grid-template-columns:1fr;padding:30px}
}
@media (max-width:768px){
  .section{padding:64px 0}
  .hero-stats{grid-template-columns:1fr;gap:12px}
  .hero-stats li{text-align:left}
  .grid-2,.grid-3,.grid-4,.grid-6{grid-template-columns:1fr}
  .metrics-grid{grid-template-columns:1fr}
  .compare{grid-template-columns:1fr}
  .brand-text small{display:none}
  .news-item{grid-template-columns:104px 1fr;gap:14px}
  .log-item{grid-template-columns:1fr;gap:6px}
  .footer-top{grid-template-columns:1fr;padding:44px 24px 32px}
  .fab-label{display:none}
  .fab{padding:9px}
}
@media (max-width:520px){
  .container{padding:0 18px}
  .brand-text strong{font-size:13.5px}
  .btn{padding:11px 18px;font-size:14px}
  .btn-sm{padding:8px 13px;font-size:12.5px}
  .hero h1{font-size:26px}
  .hero-lead{font-size:15.5px}
  .hero-cta{flex-direction:column;align-items:stretch}
  .hero-cta .btn{width:100%}
  .play-btn{padding:10px 18px 10px 10px;font-size:13.5px}
  .news-item{grid-template-columns:1fr}
  .news-thumb{aspect-ratio:16/9}
  .modal-body{padding:20px}
  .footer-bottom{flex-direction:column}
}

/* roulang page: category1 */
:root{
  --bg-0:#030712;
  --bg-1:#081229;
  --bg-2:#0a1730;
  --blue:#2563eb;
  --blue-2:#3b82f6;
  --cyan:#38bdf8;
  --holo:#60a5fa;
  --text:#f8fafc;
  --muted:#94a3b8;
  --line:rgba(96,165,250,.18);
  --line-strong:rgba(56,189,248,.42);
  --glass:linear-gradient(160deg,rgba(56,189,248,.10),rgba(8,18,41,.72));
  --radius:20px;
  --radius-sm:14px;
  --radius-xs:10px;
  --shadow:0 20px 50px rgba(2,6,23,.55);
  --glow:0 0 24px rgba(37,99,235,.45);
  --glow-cyan:0 0 30px rgba(56,189,248,.35);
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:'Be Vietnam Pro',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;
  font-size:16px;
  line-height:1.65;
  color:var(--text);
  background:var(--bg-0);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background-image:
    linear-gradient(rgba(56,189,248,.045) 1px,transparent 1px),
    linear-gradient(90deg,rgba(56,189,248,.045) 1px,transparent 1px);
  background-size:72px 72px;
  mask-image:radial-gradient(80% 70% at 50% 0%,#000 10%,transparent 85%);
  -webkit-mask-image:radial-gradient(80% 70% at 50% 0%,#000 10%,transparent 85%);
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none;transition:color .2s ease}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
ul{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;line-height:1.25;letter-spacing:-.015em}
p{margin:0}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px;position:relative;z-index:1}
main{position:relative;z-index:1;padding-top:74px}

/* ---------- HEADER ---------- */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:120;
  background:rgba(3,7,18,.82);
  backdrop-filter:blur(18px);
  -webkit-backdrop-filter:blur(18px);
  border-bottom:1px solid var(--line);
}
.header-inner{display:flex;align-items:center;gap:20px;min-height:74px}
.brand{display:flex;align-items:center;gap:12px;flex-shrink:0}
.brand-mark{
  width:42px;height:42px;flex:0 0 42px;
  display:grid;place-items:center;
  border-radius:14px;
  font-size:19px;
  background:linear-gradient(135deg,rgba(37,99,235,.9),rgba(56,189,248,.85));
  box-shadow:var(--glow);
}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text strong{font-size:15px;font-weight:700;letter-spacing:-.01em}
.brand-text small{font-size:11px;color:var(--muted);letter-spacing:.02em}
.main-nav{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav-link{
  padding:9px 14px;
  border-radius:999px;
  font-size:14px;
  font-weight:500;
  color:var(--muted);
  white-space:nowrap;
  border:1px solid transparent;
  transition:.22s ease;
}
.nav-link:hover{color:var(--text);background:rgba(56,189,248,.08);border-color:var(--line)}
.nav-link.is-active{color:var(--text);background:rgba(37,99,235,.2);border-color:var(--line-strong);box-shadow:0 0 18px rgba(37,99,235,.28)}
.header-actions{display:flex;align-items:center;gap:10px;flex-shrink:0}
.nav-toggle{
  display:none;
  width:44px;height:44px;
  border-radius:12px;
  border:1px solid var(--line);
  background:rgba(56,189,248,.06);
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:5px;
}
.nav-toggle span{display:block;width:20px;height:2px;background:var(--cyan);border-radius:2px;transition:.2s}

/* ---------- BUTTONS ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 24px;
  border-radius:999px;
  font-size:15px;font-weight:600;
  border:1px solid transparent;
  transition:transform .22s ease,box-shadow .22s ease,background .22s ease,color .22s ease;
  cursor:pointer;
  white-space:nowrap;
}
.btn-primary{
  background:linear-gradient(135deg,var(--blue),var(--cyan));
  color:#02101f;
  box-shadow:var(--glow);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 0 36px rgba(56,189,248,.6)}
.btn-primary:active{transform:translateY(0);box-shadow:0 0 14px rgba(37,99,235,.5)}
.btn-outline{
  border-color:var(--line-strong);
  color:var(--holo);
  background:rgba(37,99,235,.08);
}
.btn-outline:hover{background:rgba(37,99,235,.2);color:#fff;box-shadow:0 0 22px rgba(37,99,235,.35)}
.btn-ghost{color:var(--muted);border-color:transparent}
.btn-ghost:hover{color:var(--text);background:rgba(148,163,184,.1)}
.btn-sm{padding:9px 16px;font-size:13.5px}
.btn-lg{padding:15px 30px;font-size:16px}
.btn-block{width:100%}

/* ---------- PILLS / TAGS ---------- */
.pill{
  display:inline-flex;align-items:center;gap:8px;
  padding:8px 16px;
  border-radius:999px;
  font-size:12.5px;font-weight:600;letter-spacing:.05em;text-transform:uppercase;
  color:var(--cyan);
  background:rgba(56,189,248,.09);
  border:1px solid var(--line-strong);
}
.eyebrow{
  display:inline-block;
  font-size:12.5px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;
  color:var(--cyan);
  margin-bottom:14px;
}
.tag{
  display:inline-block;
  padding:4px 11px;
  border-radius:999px;
  font-size:11.5px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;
  background:rgba(56,189,248,.12);
  color:var(--cyan);
  border:1px solid var(--line);
}
.tag-warm{background:rgba(250,204,21,.12);color:#fde68a;border-color:rgba(250,204,21,.3)}
.tag-live{background:rgba(16,185,129,.14);color:#6ee7b7;border-color:rgba(16,185,129,.32)}

/* ---------- SECTION BASE ---------- */
.section{padding:86px 0;position:relative}
.section-alt{
  background:linear-gradient(180deg,rgba(8,18,41,.82),rgba(3,7,18,.35));
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.section-head{max-width:780px;margin-bottom:44px}
.section-head h2{font-size:clamp(23px,2.9vw,34px);font-weight:700}
.section-head p{margin-top:14px;color:var(--muted);font-size:15.5px;line-height:1.7}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}

/* ---------- CATEGORY HERO ---------- */
.cat-hero{position:relative;padding:78px 0 84px;overflow:hidden;isolation:isolate}
.cat-hero-bg{position:absolute;inset:0;z-index:-2}
.cat-hero-bg img{width:100%;height:100%;object-fit:cover;opacity:.28}
.cat-hero-bg::after{
  content:"";
  position:absolute;inset:0;
  background:
    radial-gradient(70% 60% at 18% 22%,rgba(37,99,235,.42),transparent 72%),
    linear-gradient(180deg,rgba(3,7,18,.86) 0%,rgba(3,7,18,.94) 58%,var(--bg-0) 100%);
}
.cat-hero::after{
  content:"";
  position:absolute;inset:0;z-index:-1;pointer-events:none;
  background-image:
    linear-gradient(rgba(56,189,248,.07) 1px,transparent 1px),
    linear-gradient(90deg,rgba(56,189,248,.07) 1px,transparent 1px);
  background-size:64px 64px;
  mask-image:radial-gradient(62% 62% at 30% 40%,#000,transparent);
  -webkit-mask-image:radial-gradient(62% 62% at 30% 40%,#000,transparent);
}
.cat-hero-grid{display:grid;grid-template-columns:1.08fr .92fr;gap:56px;align-items:center}
.cat-hero h1{
  font-size:clamp(27px,3.9vw,46px);
  font-weight:800;
  letter-spacing:-.02em;
  margin:20px 0 18px;
}
.cat-hero h1 em{
  font-style:normal;
  background:linear-gradient(120deg,#ffffff 15%,#93c5fd 55%,#38bdf8 92%);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}
.cat-lead{color:#cbd5e1;font-size:16.5px;line-height:1.72;max-width:620px}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}
.hero-stats{
  display:grid;grid-template-columns:repeat(3,1fr);gap:20px;
  margin-top:40px;padding-top:26px;border-top:1px solid var(--line);
}
.hero-stat strong{display:block;font-size:26px;font-weight:800;color:var(--cyan);letter-spacing:-.02em}
.hero-stat span{display:block;margin-top:4px;font-size:12.5px;color:var(--muted);line-height:1.5}
.hero-visual{position:relative}
.hero-visual img{
  width:100%;
  border-radius:var(--radius);
  border:1px solid var(--line-strong);
  box-shadow:var(--shadow),0 0 40px rgba(37,99,235,.25);
}
.hero-float{
  position:absolute;
  left:-18px;bottom:26px;
  display:flex;align-items:center;gap:12px;
  padding:14px 18px;
  border-radius:var(--radius-sm);
  background:rgba(3,7,18,.9);
  border:1px solid var(--line-strong);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  box-shadow:var(--glow-cyan);
}
.hero-float b{display:block;font-size:18px;color:#6ee7b7}
.hero-float small{display:block;font-size:11.5px;color:var(--muted)}

/* ---------- METRIC BOARD ---------- */
.metric-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.metric-card{
  padding:26px 24px;
  border-radius:var(--radius-sm);
  background:var(--glass);
  border:1px solid var(--line);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  transition:.25s ease;
}
.metric-card:hover{border-color:var(--line-strong);box-shadow:var(--glow-cyan);transform:translateY(-3px)}
.metric-card b{display:block;font-size:32px;font-weight:800;letter-spacing:-.03em;color:var(--holo)}
.metric-card h3{font-size:15px;margin:10px 0 8px;font-weight:600}
.metric-card p{font-size:13.5px;color:var(--muted);line-height:1.65}

/* ---------- FORMULA MATRIX ---------- */
.formula-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.formula-card{
  position:relative;
  padding:28px 26px;
  border-radius:var(--radius);
  background:var(--glass);
  border:1px solid var(--line);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  transition:.28s ease;
  overflow:hidden;
}
.formula-card::before{
  content:"";
  position:absolute;left:0;top:0;height:2px;width:100%;
  background:linear-gradient(90deg,transparent,var(--cyan),transparent);
  opacity:0;transition:.28s ease;
}
.formula-card:hover{transform:translateY(-5px);border-color:var(--line-strong);box-shadow:var(--glow-cyan)}
.formula-card:hover::before{opacity:1}
.formula-card h3{font-size:19px;margin:16px 0 10px}
.formula-card > p{font-size:14.5px;color:var(--muted);line-height:1.7}
.formula-list{margin-top:16px;display:grid;gap:9px}
.formula-list li{
  position:relative;
  padding-left:20px;
  font-size:13.8px;
  color:#cbd5e1;
  line-height:1.6;
}
.formula-list li::before{
  content:"";
  position:absolute;left:0;top:8px;
  width:8px;height:8px;border-radius:3px;
  background:linear-gradient(135deg,var(--blue-2),var(--cyan));
  box-shadow:0 0 10px rgba(56,189,248,.6);
}

/* ---------- SPLIT BLOCK ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:54px;align-items:center}
.split-media img{
  width:100%;
  border-radius:var(--radius);
  border:1px solid var(--line);
  box-shadow:var(--shadow);
}
.split-body h2{font-size:clamp(23px,2.8vw,33px);font-weight:700;margin-bottom:16px}
.split-body > p{color:var(--muted);font-size:15.5px;line-height:1.72}
.check-list{margin-top:26px;display:grid;gap:0}
.check-list li{
  display:flex;gap:14px;align-items:flex-start;
  padding:14px 0;
  border-bottom:1px dashed rgba(96,165,250,.18);
}
.check-list li:last-child{border-bottom:0}
.check-list i{
  flex:0 0 24px;width:24px;height:24px;margin-top:2px;
  display:grid;place-items:center;
  border-radius:8px;
  font-style:normal;font-size:12px;font-weight:700;
  color:#02101f;
  background:linear-gradient(135deg,var(--blue-2),var(--cyan));
  box-shadow:0 0 14px rgba(56,189,248,.4);
}
.check-list strong{display:block;font-size:15px;margin-bottom:3px}
.check-list span{display:block;font-size:13.6px;color:var(--muted);line-height:1.62}

/* ---------- STEPS ---------- */
.steps{display:grid;grid-template-columns:repeat(5,1fr);gap:18px;counter-reset:step}
.step{
  position:relative;
  padding:26px 22px;
  border-radius:var(--radius-sm);
  background:linear-gradient(180deg,rgba(56,189,248,.09),rgba(8,18,41,.55));
  border:1px solid var(--line);
  transition:.25s ease;
}
.step:hover{border-color:var(--line-strong);box-shadow:var(--glow-cyan)}
.step::before{
  counter-increment:step;
  content:counter(step,decimal-leading-zero);
  display:block;
  font-size:22px;font-weight:800;letter-spacing:-.03em;
  color:transparent;
  background:linear-gradient(120deg,var(--blue-2),var(--cyan));
  -webkit-background-clip:text;
  background-clip:text;
  margin-bottom:12px;
}
.step h3{font-size:15.5px;margin-bottom:8px}
.step p{font-size:13.4px;color:var(--muted);line-height:1.65}

/* ---------- TABLE ---------- */
.table-wrap{
  overflow-x:auto;
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:rgba(8,18,41,.55);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
}
table{width:100%;border-collapse:collapse;min-width:660px}
thead th{
  padding:16px 22px;
  text-align:left;
  font-size:12.5px;font-weight:700;letter-spacing:.07em;text-transform:uppercase;
  color:var(--holo);
  background:rgba(37,99,235,.18);
  border-bottom:1px solid var(--line-strong);
}
tbody td{
  padding:16px 22px;
  font-size:14.3px;
  color:#cbd5e1;
  border-bottom:1px solid var(--line);
  line-height:1.6;
}
tbody tr:last-child td{border-bottom:0}
tbody tr:hover{background:rgba(56,189,248,.055)}
tbody td:first-child{color:var(--text);font-weight:600}

/* ---------- SCENARIO CARDS ---------- */
.scene-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.scene-card{
  border-radius:var(--radius);
  overflow:hidden;
  border:1px solid var(--line);
  background:rgba(8,18,41,.6);
  transition:.28s ease;
}
.scene-card:hover{transform:translateY(-5px);border-color:var(--line-strong);box-shadow:var(--glow-cyan)}
.scene-card img{width:100%;height:186px;object-fit:cover;opacity:.86}
.scene-body{padding:22px 22px 26px}
.scene-body h3{font-size:17px;margin:12px 0 10px}
.scene-body p{font-size:14px;color:var(--muted);line-height:1.68}

/* ---------- POST LIST ---------- */
.post-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.post-card{
  display:flex;flex-direction:column;
  border-radius:var(--radius-sm);
  overflow:hidden;
  border:1px solid var(--line);
  background:rgba(8,18,41,.6);
  transition:.26s ease;
}
.post-card:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:0 0 26px rgba(37,99,235,.32)}
.post-thumb{display:block;overflow:hidden}
.post-thumb img{width:100%;height:172px;object-fit:cover;transition:transform .4s ease}
.post-card:hover .post-thumb img{transform:scale(1.05)}
.post-body{padding:20px 20px 22px;display:flex;flex-direction:column;gap:10px;flex:1}
.post-meta{display:flex;align-items:center;gap:10px;flex-wrap:wrap;font-size:12px;color:var(--muted)}
.post-body h3{font-size:16px;line-height:1.45}
.post-body h3 a:hover{color:var(--cyan)}
.post-body p{font-size:13.6px;color:var(--muted);line-height:1.65}
.empty-note{
  padding:28px;
  border-radius:var(--radius-sm);
  border:1px dashed var(--line-strong);
  color:var(--muted);
  font-size:14.5px;
  text-align:center;
  background:rgba(8,18,41,.45);
}

/* ---------- FAQ ---------- */
.faq-list{max-width:900px}
.faq-item{
  border:1px solid var(--line);
  border-radius:var(--radius-sm);
  background:rgba(8,18,41,.55);
  margin-bottom:14px;
  overflow:hidden;
  transition:.24s ease;
}
.faq-item:hover{border-color:var(--line-strong)}
.faq-item summary{
  list-style:none;
  cursor:pointer;
  padding:20px 24px;
  font-size:15.8px;
  font-weight:600;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:"+";
  flex:0 0 auto;
  color:var(--cyan);
  font-size:22px;
  font-weight:700;
  line-height:1;
  transition:.2s ease;
}
.faq-item[open] summary::after{content:"–"}
.faq-item[open] summary{color:var(--cyan)}
.faq-body{padding:0 24px 22px;color:var(--muted);font-size:14.6px;line-height:1.72}

/* ---------- CTA ---------- */
.cta-panel{
  position:relative;
  overflow:hidden;
  border-radius:26px;
  border:1px solid var(--line-strong);
  background:linear-gradient(150deg,rgba(37,99,235,.24),rgba(3,7,18,.92));
  padding:52px;
  isolation:isolate;
}
.cta-panel::before{
  content:"";
  position:absolute;inset:0;z-index:-1;
  background-image:url('/assets/images/8e801417c5b51fbd.jpg');
  background-size:cover;
  background-position:center;
  opacity:.16;
}
.cta-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
.cta-grid h2{font-size:clamp(23px,2.8vw,33px);font-weight:700;margin-bottom:16px}
.cta-grid > div > p{color:#cbd5e1;font-size:15.4px;line-height:1.72}
.cta-form{display:grid;gap:16px}
.field{display:flex;flex-direction:column;gap:8px}
.field label{font-size:12.8px;font-weight:600;color:var(--muted);letter-spacing:.02em}
.field input,.field select{
  width:100%;
  padding:14px 16px;
  border-radius:12px;
  border:1px solid var(--line);
  background:rgba(3,7,18,.7);
  color:var(--text);
  font:inherit;
  font-size:14.6px;
  outline:none;
  transition:.22s ease;
}
.field input::placeholder{color:#64748b}
.field input:focus,.field select:focus{
  border-color:var(--line-strong);
  box-shadow:0 0 0 3px rgba(56,189,248,.18);
}
.form-note{font-size:12.4px;color:var(--muted);line-height:1.6}
.trust-row{
  display:flex;flex-wrap:wrap;gap:10px;
  margin-top:26px;padding-top:22px;border-top:1px solid var(--line);
}
.badge{
  display:inline-block;
  padding:6px 13px;
  border-radius:999px;
  font-size:11.5px;font-weight:600;letter-spacing:.04em;
  color:#cbd5e1;
  background:rgba(148,163,184,.1);
  border:1px solid var(--line);
}

/* ---------- FAB ---------- */
.fab{
  position:fixed;
  left:16px;
  bottom:96px;
  z-index:50;
  display:inline-flex;
  align-items:center;
  gap:10px;
  min-height:56px;
  padding:0 20px;
  border-radius:999px;
  font-size:13.5px;
  font-weight:600;
  color:var(--text);
  border:1px solid transparent;
  background-image:linear-gradient(rgba(7,7,13,.86),rgba(7,7,13,.86)),linear-gradient(120deg,#38bdf8,#2563eb,#a3e635);
  background-origin:border-box;
  background-clip:padding-box,border-box;
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  box-shadow:0 0 20px rgba(56,189,248,.45);
  opacity:.85;
  transition:.26s ease;
}
.fab:hover{opacity:1;transform:translateY(-3px);box-shadow:0 0 34px rgba(56,189,248,.72)}
.fab:active{transform:translateY(0) scale(.97)}
.fab-icon{
  width:30px;height:30px;flex:0 0 30px;
  display:grid;place-items:center;
  border-radius:10px;
  font-size:15px;
  background:linear-gradient(135deg,rgba(56,189,248,.9),rgba(37,99,235,.9));
  color:#02101f;
}
.fab-dot{
  position:absolute;
  top:6px;right:8px;
  width:10px;height:10px;
  border-radius:50%;
  background:#f43f5e;
  box-shadow:0 0 0 2px rgba(3,7,18,.9),0 0 12px rgba(244,63,94,.9);
  animation:pulseDot 1.6s ease-in-out infinite;
}
@keyframes pulseDot{0%,100%{transform:scale(1);opacity:1}50%{transform:scale(1.28);opacity:.7}}

/* ---------- FOOTER ---------- */
.site-footer{
  position:relative;
  z-index:1;
  margin-top:20px;
  padding-top:64px;
  background:linear-gradient(180deg,rgba(3,7,18,.4),rgba(8,18,41,.92));
  border-top:1px solid var(--line);
}
.footer-top{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1fr;
  gap:40px;
  padding-bottom:48px;
}
.footer-brand p{margin-top:18px;font-size:13.8px;color:var(--muted);line-height:1.72;max-width:420px}
.badge-row{display:flex;flex-wrap:wrap;gap:9px;margin-top:20px}
.footer-col h4{font-size:14px;margin-bottom:16px;letter-spacing:.03em}
.footer-col ul{display:grid;gap:10px}
.footer-col li{font-size:13.8px;color:var(--muted)}
.footer-col a{color:var(--muted)}
.footer-col a:hover{color:var(--cyan)}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:10px 24px;
  justify-content:space-between;
  padding:22px 24px 30px;
  border-top:1px solid var(--line);
  font-size:12.8px;
  color:#64748b;
}

/* ---------- RESPONSIVE ---------- */
@media (max-width:1024px){
  .main-nav{
    position:fixed;
    top:74px;left:0;right:0;
    flex-direction:column;
    align-items:stretch;
    gap:6px;
    margin-left:0;
    padding:18px 20px 24px;
    background:rgba(3,7,18,.98);
    border-bottom:1px solid var(--line);
    transform:translateY(-14px);
    opacity:0;
    visibility:hidden;
    transition:.26s ease;
  }
  .main-nav.is-open{transform:none;opacity:1;visibility:visible}
  .nav-link{padding:12px 14px;border-radius:12px}
  .nav-toggle{display:flex}
  .cat-hero-grid{grid-template-columns:1fr;gap:42px}
  .metric-grid{grid-template-columns:repeat(2,1fr)}
  .formula-grid{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:repeat(2,1fr)}
  .split{grid-template-columns:1fr;gap:36px}
  .scene-grid{grid-template-columns:repeat(2,1fr)}
  .post-grid{grid-template-columns:repeat(2,1fr)}
  .cta-grid{grid-template-columns:1fr;gap:36px}
  .cta-panel{padding:40px 32px}
  .footer-top{grid-template-columns:1fr 1fr;gap:34px}
}
@media (max-width:768px){
  .container{padding:0 18px}
  .section{padding:64px 0}
  .cat-hero{padding:56px 0 64px}
  .header-inner{gap:12px}
  .brand-text strong{font-size:14px}
  .brand-text small{display:none}
  .hero-stats{grid-template-columns:repeat(3,1fr);gap:12px}
  .hero-stat strong{font-size:21px}
  .hero-float{left:10px;bottom:12px;padding:12px 14px}
  .footer-bottom{flex-direction:column}
}
@media (max-width:520px){
  .brand-text{display:none}
  .header-actions .btn{padding:8px 13px;font-size:12.8px}
  .metric-grid,.formula-grid,.steps,.scene-grid,.post-grid{grid-template-columns:1fr}
  .hero-stats{grid-template-columns:1fr;gap:16px;text-align:left}
  .hero-cta .btn{width:100%}
  .cat-hero h1{font-size:26px}
  .cta-panel{padding:32px 20px}
  .fab{left:12px;bottom:88px;padding:0 16px}
  .fab span.fab-label{display:none}
  .faq-item summary{padding:17px 18px;font-size:14.8px}
  .faq-body{padding:0 18px 20px}
  .footer-top{grid-template-columns:1fr}
}

/* roulang page: article */
:root{
  --bg-0:#030712;
  --bg-1:#081229;
  --bg-2:#0a1730;
  --blue:#2563eb;
  --blue-2:#3b82f6;
  --cyan:#38bdf8;
  --holo:#60a5fa;
  --text:#f8fafc;
  --muted:#94a3b8;
  --line:rgba(96,165,250,.18);
  --line-strong:rgba(56,189,248,.42);
  --glass:linear-gradient(160deg,rgba(56,189,248,.10),rgba(8,18,41,.72));
  --radius:20px;
  --radius-sm:14px;
  --radius-xs:10px;
  --shadow:0 20px 50px rgba(2,6,23,.55);
  --glow:0 0 24px rgba(37,99,235,.45);
  --glow-cyan:0 0 30px rgba(56,189,248,.35);
  --container:1200px;
  --read:720px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:'Be Vietnam Pro',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;
  font-size:16px;
  line-height:1.65;
  color:var(--text);
  background:var(--bg-0);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background-image:
    linear-gradient(rgba(56,189,248,.045) 1px,transparent 1px),
    linear-gradient(90deg,rgba(56,189,248,.045) 1px,transparent 1px);
  background-size:72px 72px;
  mask-image:radial-gradient(80% 70% at 50% 0%,#000 10%,transparent 85%);
  -webkit-mask-image:radial-gradient(80% 70% at 50% 0%,#000 10%,transparent 85%);
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none;transition:color .2s ease}
button,input,select,textarea{font:inherit;color:inherit}
button{background:none;border:0;cursor:pointer}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:6px}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px;position:relative;z-index:1}
main{position:relative;z-index:1}
/* ---------- HEADER ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:120;
  background:rgba(3,7,18,.82);
  backdrop-filter:blur(18px);
  -webkit-backdrop-filter:blur(18px);
  border-bottom:1px solid var(--line);
}
.header-inner{display:flex;align-items:center;gap:20px;min-height:74px}
.brand{display:flex;align-items:center;gap:12px;flex-shrink:0}
.brand-mark{
  width:42px;height:42px;flex:0 0 42px;display:grid;place-items:center;
  border-radius:14px;font-size:19px;
  background:linear-gradient(135deg,rgba(37,99,235,.9),rgba(56,189,248,.85));
  box-shadow:var(--glow);
}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text strong{font-size:15px;font-weight:700;letter-spacing:-.01em}
.brand-text small{font-size:11px;color:var(--muted);letter-spacing:.02em}
.main-nav{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav-link{
  padding:9px 14px;border-radius:999px;font-size:14px;font-weight:500;
  color:var(--muted);white-space:nowrap;border:1px solid transparent;transition:.22s ease;
}
.nav-link:hover{color:var(--text);background:rgba(56,189,248,.08);border-color:var(--line)}
.nav-link.is-active{color:var(--text);background:rgba(37,99,235,.2);border-color:var(--line-strong);box-shadow:0 0 18px rgba(37,99,235,.28)}
.header-actions{display:flex;align-items:center;gap:10px;flex-shrink:0}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:12px;
  border:1px solid var(--line);background:rgba(56,189,248,.06);
  flex-direction:column;align-items:center;justify-content:center;gap:5px;
}
.nav-toggle span{display:block;width:20px;height:2px;background:var(--cyan);border-radius:2px;transition:.2s}
.nav-toggle.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle.is-open span:nth-child(2){opacity:0}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
/* ---------- BUTTONS ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 24px;border-radius:999px;font-size:15px;font-weight:600;
  border:1px solid transparent;cursor:pointer;white-space:nowrap;
  transition:transform .22s ease,box-shadow .22s ease,background .22s ease,color .22s ease;
}
.btn-primary{background:linear-gradient(135deg,var(--blue),var(--cyan));color:#02101f;box-shadow:var(--glow)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 0 36px rgba(56,189,248,.6)}
.btn-primary:active{transform:translateY(0);box-shadow:0 0 14px rgba(37,99,235,.5)}
.btn-outline{border-color:var(--line-strong);color:var(--holo);background:rgba(37,99,235,.08)}
.btn-outline:hover{background:rgba(37,99,235,.2);color:#fff;box-shadow:0 0 22px rgba(37,99,235,.35)}
.btn-ghost{color:var(--muted);border-color:transparent}
.btn-ghost:hover{color:var(--text);background:rgba(148,163,184,.1)}
.btn-sm{padding:9px 16px;font-size:13.5px}
.btn-lg{padding:15px 30px;font-size:16px}
.btn-block{width:100%}
/* ---------- PILLS / TAGS ---------- */
.pill{
  display:inline-flex;align-items:center;gap:8px;padding:8px 16px;border-radius:999px;
  font-size:12.5px;font-weight:600;letter-spacing:.05em;text-transform:uppercase;
  color:var(--cyan);background:rgba(56,189,248,.09);border:1px solid var(--line-strong);
}
.eyebrow{display:inline-block;font-size:12.5px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--cyan);margin-bottom:14px}
.tag{
  display:inline-block;padding:4px 11px;border-radius:999px;
  font-size:11.5px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;
  background:rgba(56,189,248,.12);color:var(--cyan);border:1px solid var(--line);
}
.tag-warm{background:rgba(250,204,21,.12);color:#fde68a;border-color:rgba(250,204,21,.3)}
.tag-live{background:rgba(16,185,129,.14);color:#6ee7b7;border-color:rgba(16,185,129,.32)}
/* ---------- SECTION BASE ---------- */
.section{padding:76px 0;position:relative}
.section-alt{background:linear-gradient(180deg,rgba(8,18,41,.62),rgba(3,7,18,.2));border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:18px;margin-bottom:38px}
.section-head h2{margin:6px 0 0;font-size:clamp(22px,2.6vw,32px);font-weight:800;letter-spacing:-.02em;max-width:720px}
.section-head p{margin:10px 0 0;color:var(--muted);max-width:640px;font-size:15px}
.section-head-left{text-align:left}
/* ---------- ARTICLE BANNER ---------- */
.article-banner{
  position:relative;
  margin-top:74px;
  padding:52px 0 54px;
  overflow:hidden;
  border-bottom:1px solid var(--line);
  background:var(--bg-1);
}
.article-banner-media{position:absolute;inset:0;z-index:0}
.article-banner-media img{width:100%;height:100%;object-fit:cover;opacity:.30}
.article-banner-mask{
  position:absolute;inset:0;z-index:1;
  background:
    radial-gradient(65% 90% at 12% 0%,rgba(37,99,235,.42),transparent 68%),
    linear-gradient(90deg,rgba(3,7,18,.94) 0%,rgba(3,7,18,.78) 46%,rgba(3,7,18,.94) 100%);
}
.article-banner-inner{position:relative;z-index:2;max-width:900px}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--muted);margin-bottom:18px}
.breadcrumb a{color:var(--holo)}
.breadcrumb a:hover{color:var(--cyan)}
.breadcrumb i{font-size:9px;opacity:.6}
.article-banner h1{
  margin:14px 0 16px;
  font-size:clamp(24px,3.4vw,40px);
  font-weight:800;letter-spacing:-.02em;line-height:1.25;
  color:#fff;max-width:900px;
}
.article-banner h1 span{
  background:linear-gradient(115deg,#ffffff 25%,#93c5fd 60%,#38bdf8 95%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.article-banner .lead{margin:0;color:#cbd5e1;font-size:16px;max-width:760px}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px 18px;margin-top:24px;font-size:13.5px;color:var(--muted)}
.article-meta span{display:inline-flex;align-items:center;gap:8px}
.article-meta i{color:var(--cyan)}
/* ---------- ARTICLE LAYOUT ---------- */
.article-layout{
  display:grid;
  grid-template-columns:minmax(0,1fr) 330px;
  gap:46px;
  align-items:start;
  padding:60px 0 12px;
}
.article-main{max-width:var(--read)}
.article-main h2{
  margin:44px 0 14px;
  font-size:clamp(20px,2.2vw,26px);
  font-weight:800;letter-spacing:-.01em;
}
.article-main h2:first-child{margin-top:0}
.article-main h3{margin:30px 0 12px;font-size:18px;font-weight:700;color:#e2e8f0}
.article-main p{margin:0 0 18px;color:#cbd5e1;line-height:1.7}
.article-main ul,.article-main ol{margin:0 0 20px;padding-left:22px;color:#cbd5e1}
.article-main li{margin-bottom:10px;line-height:1.65}
.article-main strong{color:#fff}
.article-main a{color:var(--cyan);border-bottom:1px dashed rgba(56,189,248,.5)}
.article-main a:hover{color:#fff}
.article-main blockquote{
  margin:26px 0;padding:20px 22px;
  border-left:3px solid var(--cyan);
  background:var(--glass);
  border-radius:0 var(--radius-sm) var(--radius-sm) 0;
  color:#e2e8f0;font-style:normal;
}
.article-main table{width:100%;border-collapse:collapse;margin:24px 0;font-size:14.5px;display:block;overflow-x:auto}
.article-main th,.article-main td{padding:12px 14px;border:1px solid var(--line);text-align:left}
.article-main th{background:rgba(37,99,235,.16);color:#fff;font-weight:700;white-space:nowrap}
.article-main img{border-radius:var(--radius-sm);margin:22px 0;border:1px solid var(--line)}
.article-main code{background:rgba(56,189,248,.12);padding:2px 7px;border-radius:6px;font-size:14px;color:#bae6fd}
.article-divider{height:1px;background:linear-gradient(90deg,transparent,var(--line-strong),transparent);margin:46px 0}
.empty-state{
  padding:40px 30px;border-radius:var(--radius);
  border:1px dashed var(--line-strong);background:var(--glass);text-align:left;
}
.empty-state h2{margin:0 0 12px;font-size:22px}
.empty-state p{margin:0 0 22px;color:var(--muted)}
/* ---------- SIDEBAR ---------- */
.article-side{position:sticky;top:96px;display:flex;flex-direction:column;gap:20px}
.side-card{
  border:1px solid var(--line);border-radius:var(--radius-sm);
  background:var(--glass);padding:22px;box-shadow:var(--shadow);
}
.side-card h3{margin:0 0 16px;font-size:14px;font-weight:800;letter-spacing:.08em;text-transform:uppercase;color:var(--cyan)}
.side-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:2px}
.side-list a{
  display:flex;align-items:center;gap:10px;padding:9px 10px;border-radius:var(--radius-xs);
  font-size:14px;color:#cbd5e1;transition:.2s;
}
.side-list a:hover{background:rgba(56,189,248,.1);color:#fff;transform:translateX(3px)}
.side-list i{color:var(--cyan);font-size:12px}
.side-cta{background:linear-gradient(160deg,rgba(37,99,235,.28),rgba(8,18,41,.9));border-color:var(--line-strong)}
.side-cta p{margin:0 0 16px;font-size:14px;color:#cbd5e1;line-height:1.6}
.side-thumb{border-radius:var(--radius-xs);overflow:hidden;margin-bottom:16px;border:1px solid var(--line)}
.side-thumb img{width:100%;height:130px;object-fit:cover;opacity:.85}
.side-stat{display:flex;justify-content:space-between;padding:11px 0;border-bottom:1px dashed var(--line);font-size:13.5px}
.side-stat:last-child{border-bottom:0}
.side-stat span{color:var(--muted)}
.side-stat strong{color:#fff}
/* ---------- FORMULA GRID ---------- */
.grid-4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px}
.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}
.formula-card{
  border:1px solid var(--line);border-radius:var(--radius);
  background:var(--glass);padding:24px 22px;position:relative;overflow:hidden;
  transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.formula-card::after{
  content:"";position:absolute;inset:0;border-radius:inherit;pointer-events:none;
  box-shadow:inset 0 0 0 1px rgba(56,189,248,0);transition:.25s;
}
.formula-card:hover{transform:translateY(-5px);border-color:var(--line-strong);box-shadow:0 18px 40px rgba(2,6,23,.6),var(--glow-cyan)}
.formula-card h3{margin:14px 0 10px;font-size:17px;font-weight:700;color:#fff}
.formula-card p{margin:0;font-size:14px;color:var(--muted);line-height:1.65}
.formula-num{
  width:42px;height:42px;border-radius:12px;display:grid;place-items:center;
  font-weight:800;font-size:16px;color:#02101f;
  background:linear-gradient(135deg,var(--blue),var(--cyan));box-shadow:var(--glow);
}
/* ---------- METRIC BOARD ---------- */
.metric-board{
  border:1px solid var(--line-strong);border-radius:var(--radius);
  background:linear-gradient(150deg,rgba(37,99,235,.16),rgba(3,7,18,.9));
  padding:30px;box-shadow:var(--shadow);
}
.metric-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:22px}
.metric{
  padding:20px;border-radius:var(--radius-sm);
  background:rgba(3,7,18,.55);border:1px solid var(--line);
}
.metric .num{
  font-size:clamp(24px,3vw,34px);font-weight:800;letter-spacing:-.02em;
  background:linear-gradient(120deg,#fff,#38bdf8);-webkit-background-clip:text;background-clip:text;color:transparent;
  display:block;line-height:1.1;
}
.metric .lbl{display:block;margin-top:8px;font-size:13px;color:var(--muted)}
.bar{height:6px;border-radius:99px;background:rgba(148,163,184,.2);margin-top:14px;overflow:hidden}
.bar i{display:block;height:100%;border-radius:99px;background:linear-gradient(90deg,var(--blue),var(--cyan));box-shadow:0 0 12px rgba(56,189,248,.6)}
.metric-note{margin:24px 0 0;font-size:13.5px;color:var(--muted);text-align:left}
/* ---------- COMPARE TABLE ---------- */
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius-sm);background:rgba(3,7,18,.5)}
.compare{width:100%;border-collapse:collapse;min-width:620px;font-size:14.5px}
.compare th,.compare td{padding:15px 18px;text-align:left;border-bottom:1px solid var(--line)}
.compare thead th{background:rgba(37,99,235,.18);color:#fff;font-weight:700;font-size:13.5px;letter-spacing:.02em}
.compare tbody tr:last-child td{border-bottom:0}
.compare tbody tr:hover{background:rgba(56,189,248,.06)}
.compare td:first-child{color:#e2e8f0;font-weight:600}
.up{color:#6ee7b7;font-weight:700}
.down{color:#fca5a5;font-weight:700}
/* ---------- TIMELINE ---------- */
.timeline{position:relative;padding-left:34px;margin-top:6px}
.timeline::before{content:"";position:absolute;left:9px;top:6px;bottom:6px;width:2px;background:linear-gradient(180deg,var(--cyan),rgba(37,99,235,.15))}
.tl-item{position:relative;padding:0 0 32px 8px}
.tl-item:last-child{padding-bottom:0}
.tl-item::before{
  content:"";position:absolute;left:-32px;top:5px;width:16px;height:16px;border-radius:50%;
  background:var(--bg-0);border:2px solid var(--cyan);box-shadow:0 0 14px rgba(56,189,248,.55);
}
.tl-item h4{margin:0 0 8px;font-size:16.5px;font-weight:700;color:#fff}
.tl-item p{margin:0;font-size:14.5px;color:var(--muted);max-width:680px;line-height:1.65}
.tl-item .tag{margin-bottom:10px}
/* ---------- CATEGORY MATRIX ---------- */
.cat-card{
  display:flex;flex-direction:column;gap:12px;
  border:1px solid var(--line);border-radius:var(--radius);
  background:var(--glass);padding:26px 24px;
  transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.cat-card:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:0 16px 38px rgba(2,6,23,.55),var(--glow-cyan)}
.cat-card i.cat-ico{font-size:20px;color:var(--cyan)}
.cat-card h3{margin:0;font-size:18px;font-weight:700;color:#fff}
.cat-card p{margin:0;font-size:14px;color:var(--muted);line-height:1.65}
.cat-card .more{margin-top:auto;font-size:13.5px;font-weight:600;color:var(--cyan);display:inline-flex;align-items:center;gap:8px}
.cat-card:hover .more{color:#fff}
/* ---------- GUARANTEE ---------- */
.guarantee-list{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.guarantee-list li{
  display:flex;gap:14px;align-items:flex-start;
  padding:18px 20px;border:1px solid var(--line);border-radius:var(--radius-sm);
  background:rgba(3,7,18,.45);font-size:14.5px;color:#cbd5e1;line-height:1.6;
}
.guarantee-list i{color:var(--cyan);font-size:17px;margin-top:3px}
.guarantee-list strong{display:block;color:#fff;font-size:15px;margin-bottom:4px}
/* ---------- FAQ ---------- */
.quick-row{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;margin-bottom:34px}
.quick-card{padding:20px;border-radius:var(--radius-sm);border:1px solid var(--line);background:rgba(3,7,18,.5)}
.quick-card span{display:block;font-size:12px;letter-spacing:.1em;text-transform:uppercase;color:var(--cyan);margin-bottom:8px;font-weight:700}
.quick-card strong{display:block;font-size:15px;color:#fff;margin-bottom:6px}
.quick-card p{margin:0;font-size:13.5px;color:var(--muted);line-height:1.6}
.faq-list{display:flex;flex-direction:column;gap:12px;max-width:860px}
.faq-item{border:1px solid var(--line);border-radius:var(--radius-sm);background:rgba(3,7,18,.5);overflow:hidden;transition:border-color .2s}
.faq-item[open]{border-color:var(--line-strong);background:rgba(37,99,235,.1)}
.faq-item summary{
  list-style:none;cursor:pointer;padding:18px 22px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  font-size:15.5px;font-weight:600;color:#f1f5f9;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:"\f067";font-family:"Font Awesome 6 Free";font-weight:900;font-size:12px;color:var(--cyan);
  transition:transform .25s ease;
}
.faq-item[open] summary::after{transform:rotate(45deg)}
.faq-item .faq-body{padding:0 22px 20px;font-size:14.5px;color:var(--muted);line-height:1.7;border-top:1px dashed var(--line);margin-top:-2px;padding-top:16px}
/* ---------- CTA ---------- */
.cta-panel{
  display:grid;grid-template-columns:1.05fr .95fr;gap:40px;align-items:center;
  border:1px solid var(--line-strong);border-radius:var(--radius);
  background:linear-gradient(140deg,rgba(37,99,235,.22),rgba(3,7,18,.94));
  padding:44px;box-shadow:var(--shadow);
}
.cta-panel h2{margin:12px 0 14px;font-size:clamp(22px,2.8vw,30px);font-weight:800;letter-spacing:-.02em}
.cta-panel p{margin:0 0 20px;color:#cbd5e1;font-size:15px;line-height:1.7}
.cta-list{list-style:none;margin:0 0 24px;padding:0;display:flex;flex-direction:column;gap:10px}
.cta-list li{display:flex;gap:10px;align-items:center;font-size:14.5px;color:#cbd5e1}
.cta-list i{color:#6ee7b7}
.cta-form{padding:26px;border-radius:var(--radius-sm);background:rgba(3,7,18,.7);border:1px solid var(--line)}
.cta-form h3{margin:0 0 6px;font-size:17px;color:#fff}
.cta-form .hint{margin:0 0 18px;font-size:13px;color:var(--muted)}
.field{margin-bottom:14px}
.field label{display:block;font-size:12.5px;font-weight:600;color:var(--muted);margin-bottom:7px;letter-spacing:.03em}
.field input,.field select{
  width:100%;padding:12px 14px;border-radius:var(--radius-xs);
  background:rgba(8,18,41,.9);border:1px solid var(--line);color:var(--text);font-size:14.5px;
  transition:.2s;
}
.field input::placeholder{color:#64748b}
.field input:focus,.field select:focus{border-color:var(--cyan);box-shadow:0 0 0 3px rgba(56,189,248,.16);outline:none}
.form-note{margin:12px 0 0;font-size:12.5px;color:var(--muted);text-align:left}
.pay-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}
.pay-row span{
  padding:6px 12px;border-radius:999px;font-size:12px;font-weight:600;
  border:1px solid var(--line);background:rgba(56,189,248,.08);color:#bae6fd;
}
/* ---------- FOOTER ---------- */
.site-footer{position:relative;z-index:1;margin-top:40px;background:linear-gradient(180deg,rgba(8,18,41,.7),rgba(3,7,18,1));border-top:1px solid var(--line)}
.footer-top{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:36px;padding:56px 24px 40px}
.footer-brand p{margin:16px 0 18px;font-size:14px;color:var(--muted);line-height:1.7;max-width:400px}
.badge-row{display:flex;flex-wrap:wrap;gap:8px}
.badge{
  padding:5px 11px;border-radius:999px;font-size:11.5px;font-weight:700;letter-spacing:.05em;
  color:#a5b4fc;background:rgba(37,99,235,.14);border:1px solid var(--line);
}
.footer-col h4{margin:0 0 16px;font-size:13px;font-weight:800;letter-spacing:.1em;text-transform:uppercase;color:var(--cyan)}
.footer-col ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:10px}
.footer-col a,.footer-col li{font-size:14px;color:var(--muted)}
.footer-col a:hover{color:var(--cyan)}
.footer-bottom{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;
  padding:20px 24px 30px;border-top:1px solid var(--line);
}
.footer-bottom p{margin:0;font-size:12.5px;color:#64748b}
/* ---------- FAB ---------- */
.fab{
  position:fixed;left:16px;bottom:96px;z-index:50;
  display:inline-flex;align-items:center;gap:10px;
  padding:12px 18px;border-radius:999px;
  background:rgba(7,7,13,.8);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border:1px solid transparent;
  background-image:linear-gradient(rgba(7,7,13,.85),rgba(7,7,13,.85)),linear-gradient(120deg,#38bdf8,#2563eb,#a3e635);
  background-origin:border-box;background-clip:padding-box,border-box;
  box-shadow:0 0 20px rgba(6,182,212,.45);
  font-size:13.5px;font-weight:600;color:#e0f2fe;opacity:.82;
  transition:opacity .25s ease,transform .25s ease,box-shadow .25s ease;
  animation:fabPulse 3.2s ease-in-out infinite;
}
@keyframes fabPulse{0%,100%{box-shadow:0 0 18px rgba(6,182,212,.35)}50%{box-shadow:0 0 30px rgba(6,182,212,.62)}}
.fab i{font-size:16px;color:#38bdf8}
.fab:hover{opacity:1;transform:translateY(-3px) scale(1.04);box-shadow:0 0 38px rgba(6,182,212,.75)}
.fab:hover i{animation:fabFlick .5s ease-in-out 2}
@keyframes fabFlick{0%,100%{opacity:1}50%{opacity:.35}}
.fab:active{transform:translateY(0) scale(.96)}
.fab .dot{position:absolute;top:-3px;right:-3px;width:12px;height:12px;border-radius:50%;background:#ef4444;box-shadow:0 0 10px rgba(239,68,68,.9);animation:blink 1.6s infinite}
@keyframes blink{0%,100%{opacity:1}50%{opacity:.25}}
/* ---------- RESPONSIVE ---------- */
@media (max-width:1100px){
  .article-layout{grid-template-columns:minmax(0,1fr) 300px;gap:32px}
  .grid-4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .metric-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-top{grid-template-columns:1fr 1fr;gap:30px}
}
@media (max-width:980px){
  .main-nav{
    position:absolute;top:74px;left:0;right:0;
    flex-direction:column;align-items:stretch;gap:6px;
    padding:16px 20px 22px;margin-left:0;
    background:rgba(3,7,18,.98);border-bottom:1px solid var(--line);
    box-shadow:0 24px 40px rgba(2,6,23,.7);
    display:none;
  }
  .main-nav.is-open{display:flex}
  .nav-link{padding:12px 14px;border-radius:12px}
  .nav-toggle{display:flex}
  .article-layout{grid-template-columns:minmax(0,1fr);gap:34px}
  .article-side{position:static}
  .cta-panel{grid-template-columns:1fr;padding:32px}
  .quick-row{grid-template-columns:1fr}
  .grid-3{grid-template-columns:1fr}
}
@media (max-width:768px){
  .container{padding:0 18px}
  .header-actions .btn-ghost{display:none}
  .brand-text small{display:none}
  .section{padding:56px 0}
  .article-banner{padding:38px 0 40px}
  .article-layout{padding:40px 0 0}
  .metric-board{padding:22px}
  .guarantee-list{grid-template-columns:1fr}
  .grid-4{grid-template-columns:1fr}
  .grid-2{grid-template-columns:1fr}
  .cta-panel{padding:26px 20px}
  .footer-top{grid-template-columns:1fr;padding:44px 18px 30px}
}
@media (max-width:520px){
  .header-inner{min-height:66px;gap:12px}
  .brand-mark{width:38px;height:38px;flex:0 0 38px;font-size:17px}
  .brand-text strong{font-size:13.5px}
  .btn{padding:11px 18px;font-size:14px}
  .btn-sm{padding:8px 12px;font-size:12.5px}
  .header-actions{gap:6px}
  .article-banner h1{font-size:22px}
  .article-main h2{font-size:20px}
  .compare th,.compare td{padding:11px 12px}
  .fab{left:12px;bottom:84px;padding:10px 14px;font-size:12.5px}
}

/* roulang page: category2 */
:root{
  --bg-0:#030712;
  --bg-1:#081229;
  --bg-2:#0a1730;
  --blue:#2563eb;
  --blue-2:#3b82f6;
  --cyan:#38bdf8;
  --holo:#60a5fa;
  --text:#f8fafc;
  --muted:#94a3b8;
  --line:rgba(96,165,250,.18);
  --line-strong:rgba(56,189,248,.42);
  --glass:linear-gradient(160deg,rgba(56,189,248,.10),rgba(8,18,41,.72));
  --radius:20px;
  --radius-sm:14px;
  --radius-xs:10px;
  --shadow:0 20px 50px rgba(2,6,23,.55);
  --glow:0 0 24px rgba(37,99,235,.45);
  --glow-cyan:0 0 30px rgba(56,189,248,.35);
  --container:1200px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:'Be Vietnam Pro',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;
  font-size:16px;
  line-height:1.65;
  color:var(--text);
  background:var(--bg-0);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background-image:
    linear-gradient(rgba(56,189,248,.045) 1px,transparent 1px),
    linear-gradient(90deg,rgba(56,189,248,.045) 1px,transparent 1px);
  background-size:72px 72px;
  mask-image:radial-gradient(80% 70% at 50% 0%,#000 10%,transparent 85%);
  -webkit-mask-image:radial-gradient(80% 70% at 50% 0%,#000 10%,transparent 85%);
}
h1,h2,h3,h4{margin:0;line-height:1.25;letter-spacing:-.015em}
p{margin:0 0 14px}
ul{margin:0;padding:0;list-style:none}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none;transition:color .2s ease}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:8px}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px;position:relative;z-index:1}
main{position:relative;z-index:1}

/* ---------- HEADER ---------- */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:120;
  background:rgba(3,7,18,.82);
  backdrop-filter:blur(18px);
  -webkit-backdrop-filter:blur(18px);
  border-bottom:1px solid var(--line);
}
.header-inner{display:flex;align-items:center;gap:20px;min-height:74px}
.brand{display:flex;align-items:center;gap:12px;flex-shrink:0}
.brand-mark{
  width:42px;height:42px;flex:0 0 42px;
  display:grid;place-items:center;
  border-radius:14px;
  font-size:19px;
  background:linear-gradient(135deg,rgba(37,99,235,.9),rgba(56,189,248,.85));
  box-shadow:var(--glow);
}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text strong{font-size:15px;font-weight:700;letter-spacing:-.01em}
.brand-text small{font-size:11px;color:var(--muted);letter-spacing:.02em}
.main-nav{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav-link{
  padding:9px 14px;
  border-radius:999px;
  font-size:14px;
  font-weight:500;
  color:var(--muted);
  white-space:nowrap;
  border:1px solid transparent;
  transition:.22s ease;
}
.nav-link:hover{color:var(--text);background:rgba(56,189,248,.08);border-color:var(--line)}
.nav-link.is-active{color:var(--text);background:rgba(37,99,235,.2);border-color:var(--line-strong);box-shadow:0 0 18px rgba(37,99,235,.28)}
.header-actions{display:flex;align-items:center;gap:10px;flex-shrink:0}
.nav-toggle{
  display:none;
  width:44px;height:44px;
  border-radius:12px;
  border:1px solid var(--line);
  background:rgba(56,189,248,.06);
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:5px;
}
.nav-toggle span{display:block;width:20px;height:2px;background:var(--cyan);border-radius:2px;transition:.2s}

/* ---------- BUTTONS ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 24px;
  border-radius:999px;
  font-size:15px;font-weight:600;
  border:1px solid transparent;
  transition:transform .22s ease,box-shadow .22s ease,background .22s ease,color .22s ease;
  cursor:pointer;
  white-space:nowrap;
}
.btn-primary{background:linear-gradient(135deg,var(--blue),var(--cyan));color:#02101f;box-shadow:var(--glow)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 0 36px rgba(56,189,248,.6)}
.btn-primary:active{transform:translateY(0);box-shadow:0 0 14px rgba(37,99,235,.5)}
.btn-outline{border-color:var(--line-strong);color:var(--holo);background:rgba(37,99,235,.08)}
.btn-outline:hover{background:rgba(37,99,235,.2);color:#fff;box-shadow:0 0 22px rgba(37,99,235,.35)}
.btn-ghost{color:var(--muted);border-color:transparent}
.btn-ghost:hover{color:var(--text);background:rgba(148,163,184,.1)}
.btn-sm{padding:9px 16px;font-size:13.5px}
.btn-lg{padding:15px 30px;font-size:16px}

/* ---------- ATOMS ---------- */
.pill{
  display:inline-flex;align-items:center;gap:8px;
  padding:8px 16px;border-radius:999px;
  font-size:12.5px;font-weight:600;letter-spacing:.05em;text-transform:uppercase;
  color:var(--cyan);background:rgba(56,189,248,.09);border:1px solid var(--line-strong);
}
.eyebrow{display:inline-block;font-size:12.5px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--cyan);margin-bottom:14px}
.tag{
  display:inline-block;padding:4px 11px;border-radius:999px;
  font-size:11.5px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;
  background:rgba(56,189,248,.12);color:var(--cyan);border:1px solid var(--line);
}
.tag-warm{background:rgba(250,204,21,.12);color:#fde68a;border-color:rgba(250,204,21,.3)}
.tag-live{background:rgba(16,185,129,.14);color:#6ee7b7;border-color:rgba(16,185,129,.32)}
.hl{background:linear-gradient(120deg,#93c5fd,#38bdf8);-webkit-background-clip:text;background-clip:text;color:transparent}

/* ---------- HERO ---------- */
.cat-hero{position:relative;padding:132px 0 86px;overflow:hidden;isolation:isolate;background:var(--bg-1)}
.hero-media{position:absolute;inset:0;z-index:-1}
.hero-media img{width:100%;height:100%;object-fit:cover;opacity:.34}
.hero-mask{
  position:absolute;inset:0;z-index:-1;
  background:
    radial-gradient(72% 60% at 22% 20%,rgba(37,99,235,.42),transparent 72%),
    linear-gradient(180deg,rgba(3,7,18,.86) 0%,rgba(3,7,18,.94) 58%,var(--bg-0) 100%);
}
.hero-grid{
  position:absolute;inset:0;z-index:-1;
  background-image:
    linear-gradient(rgba(56,189,248,.09) 1px,transparent 1px),
    linear-gradient(90deg,rgba(56,189,248,.09) 1px,transparent 1px);
  background-size:60px 60px;
  mask-image:radial-gradient(65% 60% at 40% 35%,#000,transparent);
  -webkit-mask-image:radial-gradient(65% 60% at 40% 35%,#000,transparent);
}
.cat-hero-inner{display:grid;grid-template-columns:1.12fr .88fr;gap:56px;align-items:center}
.cat-hero h1{margin:20px 0 18px;font-size:clamp(27px,3.5vw,44px);font-weight:800}
.hero-lead{color:#cbd5e1;font-size:16.5px;max-width:640px;line-height:1.7}
.hero-list{display:flex;flex-direction:column;gap:10px;margin:22px 0 28px}
.hero-list li{display:flex;gap:11px;align-items:flex-start;color:#cbd5e1;font-size:15px;line-height:1.6}
.hero-list i{color:var(--cyan);margin-top:5px;flex:0 0 auto}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px}
.hero-note{margin:20px 0 0;font-size:13px;color:var(--muted);display:flex;flex-wrap:wrap;gap:8px 18px}
.hero-note span{display:inline-flex;align-items:center;gap:7px}
.hero-note i{color:var(--holo)}

.phone-frame{
  position:relative;width:100%;max-width:330px;margin-left:auto;
  padding:12px;border-radius:34px;
  background:linear-gradient(160deg,rgba(56,189,248,.35),rgba(8,18,41,.92));
  border:1px solid var(--line-strong);
  box-shadow:var(--shadow),var(--glow-cyan);
}
.phone-frame img{width:100%;aspect-ratio:9/16;object-fit:cover;border-radius:24px}
.phone-hud{
  position:absolute;left:24px;right:24px;bottom:26px;
  display:flex;justify-content:space-between;gap:10px;
  padding:12px 16px;border-radius:16px;
  background:rgba(3,7,18,.8);
  backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
  border:1px solid var(--line-strong);
}
.hud-item{display:flex;flex-direction:column;line-height:1.25}
.hud-item b{font-size:15px;color:var(--cyan)}
.hud-item span{font-size:10.5px;color:var(--muted);letter-spacing:.04em;text-transform:uppercase}
.phone-cap{margin-top:16px;text-align:center;font-size:12.5px;color:var(--muted);letter-spacing:.05em;text-transform:uppercase}

/* ---------- SECTIONS ---------- */
.section{padding:82px 0;border-top:1px solid var(--line);position:relative}
.section-alt{background:linear-gradient(180deg,rgba(8,18,41,.7),rgba(3,7,18,0))}
.section-head{max-width:780px;margin-bottom:44px}
.section-head h2{font-size:clamp(23px,2.7vw,34px);font-weight:700;margin-bottom:14px}
.section-head p{color:var(--muted);font-size:15.5px;max-width:700px}
.section-head.is-center{margin-left:auto;margin-right:auto;text-align:center}
.section-head.is-center p{margin-left:auto;margin-right:auto}

/* ---------- METRICS ---------- */
.metric-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.metric{
  padding:26px 22px;border-radius:var(--radius);
  background:var(--glass);border:1px solid var(--line);
  transition:transform .28s ease,box-shadow .28s ease,border-color .28s ease;
}
.metric:hover{transform:translateY(-5px);border-color:var(--line-strong);box-shadow:var(--glow-cyan)}
.metric-value{
  font-size:36px;font-weight:800;line-height:1.1;
  background:linear-gradient(120deg,#bfdbfe,#38bdf8);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.metric-label{font-size:14.5px;font-weight:600;margin:12px 0 6px}
.metric-desc{font-size:13.5px;color:var(--muted);margin:0}

/* ---------- STRATEGY CARDS ---------- */
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.strategy{
  position:relative;padding:28px 24px;border-radius:var(--radius);
  background:var(--glass);border:1px solid var(--line);
  transition:transform .3s ease,box-shadow .3s ease,border-color .3s ease;
}
.strategy:hover{transform:translateY(-7px);border-color:var(--line-strong);box-shadow:0 18px 40px rgba(2,6,23,.6),var(--glow-cyan)}
.strategy-icon{
  width:46px;height:46px;border-radius:14px;display:grid;place-items:center;
  background:rgba(56,189,248,.12);border:1px solid var(--line-strong);
  color:var(--cyan);font-size:18px;margin-bottom:16px;
}
.strategy h3{font-size:17.5px;margin-bottom:10px}
.strategy p{color:var(--muted);font-size:14.5px;margin-bottom:14px}
.strategy ul li{display:flex;gap:9px;align-items:flex-start;font-size:14px;color:#cbd5e1;margin-bottom:7px}
.strategy ul i{color:var(--holo);font-size:11px;margin-top:6px}
.card-foot{margin-top:16px;padding-top:14px;border-top:1px dashed var(--line);display:flex;justify-content:space-between;align-items:center;gap:10px}

/* ---------- COMPARE TABLE ---------- */
.compare-wrap{overflow-x:auto;border-radius:var(--radius);border:1px solid var(--line);background:rgba(8,18,41,.62)}
table.compare{width:100%;border-collapse:collapse;min-width:660px}
.compare th,.compare td{padding:16px 20px;text-align:left;font-size:14.5px;border-bottom:1px solid var(--line);vertical-align:top}
.compare thead th{background:rgba(37,99,235,.16);font-size:12.5px;text-transform:uppercase;letter-spacing:.07em;color:var(--cyan);font-weight:700}
.compare tbody tr:last-child td{border-bottom:0}
.compare tbody tr:hover{background:rgba(56,189,248,.05)}
.compare td:first-child{font-weight:600;color:#e2e8f0;width:30%}
.good{color:#6ee7b7;font-weight:600}
.bad{color:#fca5a5}

/* ---------- TIMELINE ---------- */
.timeline{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;position:relative;padding-top:8px}
.timeline::before{content:"";position:absolute;top:26px;left:0;right:0;height:1px;background:linear-gradient(90deg,transparent,var(--line-strong),transparent)}
.milestone{position:relative;padding-top:56px}
.milestone-dot{
  position:absolute;top:16px;left:0;width:20px;height:20px;border-radius:50%;
  background:var(--bg-0);border:2px solid var(--cyan);box-shadow:var(--glow-cyan);
}
.milestone .step{display:block;font-size:11.5px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--cyan);margin-bottom:6px}
.milestone h3{font-size:16.5px;margin-bottom:8px}
.milestone p{font-size:14px;color:var(--muted);margin:0}

/* ---------- FORMULA ---------- */
.formula-layout{display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:start}
.formula-list{display:grid;gap:2px;border-top:1px solid var(--line)}
.formula-item{display:grid;grid-template-columns:auto 1fr;gap:18px;padding:18px 0;border-bottom:1px dashed var(--line)}
.formula-index{font-size:13px;font-weight:700;color:var(--cyan);letter-spacing:.08em;padding-top:3px}
.formula-item h3{font-size:15.5px;margin-bottom:6px}
.formula-item p{font-size:14px;color:var(--muted);margin:0}
.formula-panel{
  padding:28px 24px;border-radius:var(--radius);
  background:linear-gradient(160deg,rgba(37,99,235,.24),rgba(3,7,18,.88));
  border:1px solid var(--line-strong);box-shadow:var(--shadow);
}
.formula-panel h3{font-size:17px;margin-bottom:6px}
.formula-panel > p{font-size:13.5px;color:var(--muted);margin-bottom:18px}
.money-row{display:flex;justify-content:space-between;align-items:baseline;gap:12px;padding:13px 0;border-bottom:1px dashed var(--line);font-size:14px;color:#cbd5e1}
.money-row:last-of-type{border-bottom:0}
.money-row b{font-size:16px;color:#fff;font-weight:700}
.money-row.is-cyan b{color:var(--cyan)}
.formula-media{margin-top:22px;border-radius:var(--radius-sm);overflow:hidden;border:1px solid var(--line)}
.formula-media img{width:100%;height:180px;object-fit:cover}

/* ---------- CATEGORY MATRIX ---------- */
.cat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.cat-card{
  display:flex;flex-direction:column;height:100%;
  padding:26px 24px;border-radius:var(--radius);
  border:1px solid var(--line);background:var(--glass);
  transition:transform .28s ease,box-shadow .28s ease,border-color .28s ease;
}
.cat-card:hover{transform:translateY(-6px);border-color:var(--line-strong);box-shadow:0 18px 40px rgba(2,6,23,.55),var(--glow-cyan)}
.cat-card .cat-num{font-size:12px;font-weight:700;letter-spacing:.14em;color:var(--cyan)}
.cat-card h3{font-size:17.5px;margin:12px 0 10px}
.cat-card p{font-size:14px;color:var(--muted);flex:1 1 auto}
.cat-more{display:inline-flex;align-items:center;gap:9px;font-size:13.5px;font-weight:600;color:var(--cyan);margin-top:8px}
.cat-card:hover .cat-more{gap:13px}

/* ---------- NEWS ---------- */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.news-item{
  display:flex;flex-direction:column;height:100%;
  padding:24px;border-radius:var(--radius);
  border:1px solid var(--line);background:rgba(8,18,41,.58);
  transition:transform .28s ease,box-shadow .28s ease,border-color .28s ease;
}
.news-item:hover{transform:translateY(-5px);border-color:var(--line-strong);box-shadow:0 16px 38px rgba(2,6,23,.55)}
.news-meta{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:13px;font-size:12.5px;color:var(--muted)}
.news-item h3{font-size:16.5px;margin-bottom:10px}
.news-item h3 a:hover{color:var(--cyan)}
.news-item p{font-size:14px;color:var(--muted);margin:0}
.news-empty{padding:26px;border-radius:var(--radius-sm);border:1px dashed var(--line-strong);color:var(--muted);font-size:14.5px;background:rgba(8,18,41,.5)}

/* ---------- GUARANTEE ---------- */
.guarantee-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.guarantee{
  padding:24px 22px;border-radius:var(--radius-sm);
  border:1px solid var(--line);background:rgba(8,18,41,.6);
  transition:border-color .25s ease,box-shadow .25s ease;
}
.guarantee:hover{border-color:var(--line-strong);box-shadow:0 0 24px rgba(37,99,235,.22)}
.guarantee i{font-size:19px;color:var(--cyan);margin-bottom:14px;display:block}
.guarantee h3{font-size:15.5px;margin-bottom:8px}
.guarantee p{font-size:13.8px;color:var(--muted);margin:0}

/* ---------- FAQ ---------- */
.faq{display:grid;gap:12px;max-width:920px}
.faq details{
  border:1px solid var(--line);border-radius:var(--radius-sm);
  background:rgba(8,18,41,.6);padding:0 22px;
  transition:border-color .25s ease,box-shadow .25s ease;
}
.faq details[open]{border-color:var(--line-strong);box-shadow:0 0 24px rgba(37,99,235,.22)}
.faq summary{
  cursor:pointer;list-style:none;padding:19px 0;
  display:flex;justify-content:space-between;align-items:center;gap:18px;
  font-size:15.5px;font-weight:600;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--cyan);font-size:21px;font-weight:600;line-height:1;flex:0 0 auto}
.faq details[open] summary::after{content:"–"}
.faq .faq-body{padding:0 0 20px;color:var(--muted);font-size:14.5px;margin:0;max-width:820px}

/* ---------- CTA ---------- */
.cta-section{padding:82px 0;border-top:1px solid var(--line);position:relative;overflow:hidden}
.cta-inner{
  display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;
  padding:48px;border-radius:28px;
  border:1px solid var(--line-strong);
  background:linear-gradient(150deg,rgba(37,99,235,.26),rgba(3,7,18,.92));
  box-shadow:var(--shadow);
}
.cta-copy h2{font-size:clamp(22px,2.5vw,31px);margin-bottom:14px;font-weight:700}
.cta-copy p{color:#cbd5e1;font-size:15px}
.cta-benefits{display:grid;gap:11px;margin-top:20px}
.cta-benefits li{display:flex;gap:10px;align-items:flex-start;font-size:14.5px;color:#cbd5e1}
.cta-benefits i{color:var(--cyan);margin-top:5px}
.cta-form{display:grid;gap:14px}
.field{display:grid;gap:7px}
.field label{font-size:13px;font-weight:600;color:#cbd5e1;letter-spacing:.02em}
.field input,.field select{
  width:100%;padding:13px 16px;border-radius:12px;
  background:rgba(3,7,18,.72);border:1px solid var(--line);
  color:var(--text);font:inherit;font-size:14.5px;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.field input::placeholder{color:#64748b}
.field input:focus,.field select:focus{outline:none;border-color:var(--cyan);box-shadow:0 0 0 3px rgba(56,189,248,.18)}
.form-note{font-size:12.5px;color:var(--muted);margin:2px 0 0}

/* ---------- FAB ---------- */
.fab{
  position:fixed;left:16px;bottom:96px;z-index:50;
  display:inline-flex;align-items:center;gap:10px;
  min-height:48px;padding:12px 20px;border-radius:999px;
  background:
    linear-gradient(rgba(7,7,13,.9),rgba(7,7,13,.9)) padding-box,
    linear-gradient(120deg,var(--cyan),var(--blue)) border-box;
  border:1px solid transparent;
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  box-shadow:0 0 20px rgba(6,182,212,.45);
  opacity:.8;transition:opacity .28s ease,box-shadow .28s ease,transform .28s ease;
}
.fab:hover{opacity:1;transform:translateY(-2px);box-shadow:0 0 34px rgba(6,182,212,.7)}
.fab:active{transform:scale(.95) translateY(0)}
.fab i{color:var(--cyan);font-size:16px;animation:flicker 3.2s infinite}
.fab span{font-size:13.5px;font-weight:600;color:#e2e8f0}
.fab-dot{
  position:absolute;top:7px;right:9px;width:9px;height:9px;border-radius:50%;
  background:#22d3ee;box-shadow:0 0 10px #22d3ee;animation:pulse 1.6s infinite;
}
@keyframes pulse{0%,100%{opacity:1;transform:scale(1)}50%{opacity:.35;transform:scale(.78)}}
@keyframes flicker{0%,100%{opacity:1}48%{opacity:1}49%{opacity:.3}52%{opacity:1}}

/* ---------- FOOTER ---------- */
.site-footer{
  margin-top:10px;padding:66px 0 28px;
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(8,18,41,.82),rgba(3,7,18,1));
  position:relative;z-index:1;
}
.footer-top{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:38px}
.footer-brand p{color:var(--muted);font-size:14.5px;margin:18px 0;max-width:430px}
.badge-row{display:flex;flex-wrap:wrap;gap:8px}
.badge{
  padding:5px 12px;border-radius:999px;
  font-size:11.5px;font-weight:600;letter-spacing:.03em;
  color:var(--holo);background:rgba(37,99,235,.14);border:1px solid var(--line);
}
.footer-col h4{font-size:14px;margin-bottom:16px;color:#e2e8f0;letter-spacing:.02em}
.footer-col li{font-size:14px;color:var(--muted);margin-bottom:10px}
.footer-col a:hover{color:var(--cyan)}
.footer-bottom{
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  margin-top:46px;padding-top:22px;border-top:1px solid var(--line);
  font-size:13px;color:var(--muted);
}
.footer-bottom p{margin:0}

/* ---------- RESPONSIVE ---------- */
@media (max-width:1024px){
  .cat-hero-inner{grid-template-columns:1fr;gap:44px}
  .phone-frame{margin:0 auto}
  .metric-grid{grid-template-columns:repeat(2,1fr)}
  .card-grid{grid-template-columns:repeat(2,1fr)}
  .cat-grid{grid-template-columns:repeat(2,1fr)}
  .news-grid{grid-template-columns:repeat(2,1fr)}
  .guarantee-grid{grid-template-columns:repeat(2,1fr)}
  .timeline{grid-template-columns:repeat(2,1fr)}
  .timeline::before{display:none}
  .formula-layout{grid-template-columns:1fr;gap:36px}
  .cta-inner{grid-template-columns:1fr;gap:34px;padding:38px 32px}
  .footer-top{grid-template-columns:1fr 1fr;gap:30px}
}
@media (max-width:860px){
  .nav-toggle{display:flex}
  .main-nav{
    position:fixed;top:74px;left:0;right:0;
    flex-direction:column;align-items:stretch;gap:6px;
    margin-left:0;padding:16px 24px 24px;
    background:rgba(3,7,18,.97);
    border-bottom:1px solid var(--line);
    max-height:calc(100vh - 74px);overflow-y:auto;
    transform:translateY(-12px);opacity:0;pointer-events:none;
    transition:transform .25s ease,opacity .25s ease;
  }
  .main-nav.is-open{transform:translateY(0);opacity:1;pointer-events:auto}
  .nav-link{padding:12px 14px;border-radius:12px;font-size:15px}
  .section{padding:64px 0}
  .cat-hero{padding:118px 0 68px}
}
@media (max-width:560px){
  .container{padding:0 18px}
  .header-inner{gap:10px;min-height:68px}
  .brand-mark{width:38px;height:38px;flex:0 0 38px;border-radius:12px;font-size:17px}
  .brand-text strong{font-size:13px;max-width:126px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;display:block}
  .brand-text small{display:none}
  .btn{padding:11px 18px;font-size:14px}
  .btn-sm{padding:8px 12px;font-size:12.5px}
  .btn-lg{padding:13px 20px;font-size:14.5px}
  .header-actions{gap:7px}
  .metric-grid,.card-grid,.cat-grid,.news-grid,.guarantee-grid,.timeline,.footer-top{grid-template-columns:1fr}
  .metric-value{font-size:31px}
  .section{padding:56px 0}
  .section-head{margin-bottom:32px}
  .cta-inner{padding:26px 20px;border-radius:22px}
  .faq details{padding:0 16px}
  .fab{left:12px;bottom:88px;padding:11px 16px}
  .footer-bottom{flex-direction:column;gap:8px}
  .formula-media img{height:auto}
}

/* roulang page: category3 */
:root{
  --bg-0:#030712;
  --bg-1:#081229;
  --bg-2:#0a1730;
  --blue:#2563eb;
  --blue-2:#3b82f6;
  --cyan:#38bdf8;
  --holo:#60a5fa;
  --text:#f8fafc;
  --muted:#94a3b8;
  --red:#ef4444;
  --green:#10b981;
  --gold:#fbbf24;
  --line:rgba(96,165,250,.18);
  --line-strong:rgba(56,189,248,.42);
  --glass:linear-gradient(160deg,rgba(56,189,248,.10),rgba(8,18,41,.72));
  --radius:20px;
  --radius-sm:14px;
  --radius-xs:10px;
  --shadow:0 20px 50px rgba(2,6,23,.55);
  --glow:0 0 24px rgba(37,99,235,.45);
  --glow-cyan:0 0 30px rgba(56,189,248,.35);
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:'Be Vietnam Pro',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;
  font-size:16px;
  line-height:1.65;
  color:var(--text);
  background:var(--bg-0);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background-image:
    linear-gradient(rgba(56,189,248,.045) 1px,transparent 1px),
    linear-gradient(90deg,rgba(56,189,248,.045) 1px,transparent 1px);
  background-size:72px 72px;
  mask-image:radial-gradient(80% 70% at 50% 0%,#000 10%,transparent 85%);
  -webkit-mask-image:radial-gradient(80% 70% at 50% 0%,#000 10%,transparent 85%);
}
img{max-width:100%;display:block;border:0;height:auto}
a{color:inherit;text-decoration:none;transition:color .2s ease}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
input,select{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0;line-height:1.25;letter-spacing:-.02em;font-weight:700}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
::selection{background:rgba(56,189,248,.35)}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:8px}
.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}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px;position:relative;z-index:1}
main{position:relative;z-index:1}

/* ---------- HEADER ---------- */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:120;
  background:rgba(3,7,18,.82);
  backdrop-filter:blur(18px);
  -webkit-backdrop-filter:blur(18px);
  border-bottom:1px solid var(--line);
}
.header-inner{display:flex;align-items:center;gap:20px;min-height:74px}
.brand{display:flex;align-items:center;gap:12px;flex-shrink:0}
.brand-mark{
  width:42px;height:42px;flex:0 0 42px;
  display:grid;place-items:center;
  border-radius:14px;
  font-size:19px;
  background:linear-gradient(135deg,rgba(37,99,235,.9),rgba(56,189,248,.85));
  box-shadow:var(--glow);
}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text strong{font-size:15px;font-weight:700;letter-spacing:-.01em}
.brand-text small{font-size:11px;color:var(--muted);letter-spacing:.02em}
.main-nav{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav-link{
  padding:9px 14px;
  border-radius:999px;
  font-size:14px;
  font-weight:500;
  color:var(--muted);
  white-space:nowrap;
  border:1px solid transparent;
  transition:.22s ease;
}
.nav-link:hover{color:var(--text);background:rgba(56,189,248,.08);border-color:var(--line)}
.nav-link.is-active{color:var(--text);background:rgba(37,99,235,.2);border-color:var(--line-strong);box-shadow:0 0 18px rgba(37,99,235,.28)}
.header-actions{display:flex;align-items:center;gap:10px;flex-shrink:0}
.nav-toggle{
  display:none;
  width:44px;height:44px;
  border-radius:12px;
  border:1px solid var(--line);
  background:rgba(56,189,248,.06);
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:5px;
}
.nav-toggle span{display:block;width:20px;height:2px;background:var(--cyan);border-radius:2px;transition:.2s}

/* ---------- BUTTONS ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 24px;
  border-radius:999px;
  font-size:15px;font-weight:600;
  border:1px solid transparent;
  transition:transform .22s ease,box-shadow .22s ease,background .22s ease,color .22s ease;
  cursor:pointer;
  white-space:nowrap;
}
.btn-primary{background:linear-gradient(135deg,var(--blue),var(--cyan));color:#02101f;box-shadow:var(--glow)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 0 36px rgba(56,189,248,.6)}
.btn-primary:active{transform:translateY(0);box-shadow:0 0 14px rgba(37,99,235,.5)}
.btn-outline{border-color:var(--line-strong);color:var(--holo);background:rgba(37,99,235,.08)}
.btn-outline:hover{background:rgba(37,99,235,.2);color:#fff;box-shadow:0 0 22px rgba(37,99,235,.35)}
.btn-ghost{color:var(--muted);border-color:transparent}
.btn-ghost:hover{color:var(--text);background:rgba(148,163,184,.1)}
.btn-sm{padding:9px 16px;font-size:13.5px}
.btn-lg{padding:15px 30px;font-size:16px}
.btn-block{width:100%}

/* ---------- PILLS / TAGS ---------- */
.pill{
  display:inline-flex;align-items:center;gap:8px;
  padding:8px 16px;
  border-radius:999px;
  font-size:12.5px;font-weight:600;letter-spacing:.05em;text-transform:uppercase;
  color:var(--cyan);
  background:rgba(56,189,248,.09);
  border:1px solid var(--line-strong);
}
.eyebrow{
  display:inline-block;
  font-size:12.5px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;
  color:var(--cyan);
  margin-bottom:14px;
}
.tag{
  display:inline-block;
  padding:4px 11px;
  border-radius:999px;
  font-size:11.5px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;
  background:rgba(56,189,248,.12);
  color:var(--cyan);
  border:1px solid var(--line);
}
.tag-warm{background:rgba(251,191,36,.12);color:#fde68a;border-color:rgba(251,191,36,.3)}
.tag-live{background:rgba(16,185,129,.14);color:#6ee7b7;border-color:rgba(16,185,129,.32)}
.tag-hot{background:rgba(239,68,68,.14);color:#fca5a5;border-color:rgba(239,68,68,.32)}

/* ---------- SECTION BASE ---------- */
.section{padding:88px 0;position:relative}
.section-alt{background:linear-gradient(180deg,rgba(8,18,41,.78),rgba(3,7,18,.25))}
.section-line{border-top:1px solid var(--line)}
.section-head{max-width:780px;margin-bottom:44px}
.section-head h2{font-size:clamp(24px,3vw,36px);font-weight:800;margin-bottom:14px}
.section-head p{color:var(--muted);font-size:16px;line-height:1.7}
.section-head .eyebrow{margin-bottom:10px}

/* ---------- HERO ---------- */
.hero{position:relative;padding:132px 0 84px;overflow:hidden;isolation:isolate}
.hero-media{position:absolute;inset:0;z-index:-1}
.hero-media img{width:100%;height:100%;object-fit:cover;opacity:.34}
.hero-mask{
  position:absolute;inset:0;
  background:
    radial-gradient(70% 60% at 22% 12%,rgba(37,99,235,.42),transparent 70%),
    linear-gradient(180deg,rgba(3,7,18,.88) 0%,rgba(3,7,18,.94) 58%,var(--bg-0) 100%);
}
.hero-grid-lines{
  position:absolute;inset:0;
  background-image:
    linear-gradient(rgba(56,189,248,.08) 1px,transparent 1px),
    linear-gradient(90deg,rgba(56,189,248,.08) 1px,transparent 1px);
  background-size:60px 60px;
  mask-image:radial-gradient(65% 65% at 35% 30%,#000,transparent);
  -webkit-mask-image:radial-gradient(65% 65% at 35% 30%,#000,transparent);
}
.hero-layout{display:grid;grid-template-columns:1.05fr .95fr;gap:52px;align-items:start}
.hero h1{
  margin:20px 0 18px;
  font-size:clamp(28px,4vw,48px);
  font-weight:800;
  letter-spacing:-.02em;
  background:linear-gradient(120deg,#ffffff 20%,#93c5fd 58%,#38bdf8 92%);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}
.hero-lead{color:#cbd5e1;font-size:16.5px;line-height:1.72;max-width:640px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin:28px 0 22px}
.hero-note{display:flex;flex-wrap:wrap;gap:10px 18px;color:var(--muted);font-size:13.5px}
.hero-note span{display:inline-flex;align-items:center;gap:7px}
.hero-note span::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--cyan);box-shadow:0 0 10px var(--cyan)}
.area-row{display:flex;flex-wrap:wrap;gap:9px;margin-top:20px}
.area-chip{
  display:inline-flex;align-items:center;gap:7px;
  padding:7px 13px;
  border-radius:var(--radius-xs);
  font-size:12.5px;font-weight:600;
  color:#dbeafe;
  background:rgba(8,18,41,.75);
  border:1px solid var(--line);
}
.area-chip b{color:var(--cyan);font-weight:700}
.jump-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px;padding-top:22px;border-top:1px dashed var(--line)}
.jump-row a{
  font-size:13px;font-weight:600;color:var(--muted);
  padding:6px 12px;border-radius:999px;border:1px solid var(--line);
}
.jump-row a:hover{color:var(--cyan);border-color:var(--line-strong);background:rgba(56,189,248,.08)}

/* road board panel */
.board-panel{
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:22px;
  box-shadow:var(--shadow);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
}
.board-panel-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:16px}
.board-panel-head strong{font-size:14.5px;font-weight:700}
.board-panel-head .live{
  display:inline-flex;align-items:center;gap:7px;
  font-size:11.5px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:#6ee7b7;
}
.board-panel-head .live::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--green);box-shadow:0 0 12px var(--green);animation:pulse 1.6s infinite}
@keyframes pulse{0%,100%{opacity:1;transform:scale(1)}50%{opacity:.45;transform:scale(.82)}}
.board{
  display:grid;grid-template-columns:repeat(6,1fr);gap:7px;
  padding:14px;
  border-radius:var(--radius-sm);
  background:rgba(3,7,18,.62);
  border:1px solid var(--line);
}
.rdot{aspect-ratio:1;border-radius:50%;display:grid;place-items:center;font-size:10px;font-weight:800;letter-spacing:.02em}
.rdot.b{background:linear-gradient(135deg,#2563eb,#38bdf8);color:#02101f;box-shadow:0 0 12px rgba(56,189,248,.45)}
.rdot.p{background:linear-gradient(135deg,#ef4444,#f97316);color:#1a0505;box-shadow:0 0 12px rgba(239,68,68,.4)}
.rdot.t{background:rgba(148,163,184,.22);color:var(--muted)}
.board-legend{display:flex;flex-wrap:wrap;gap:14px;margin-top:16px;font-size:12.5px;color:var(--muted)}
.board-legend i{display:inline-block;width:10px;height:10px;border-radius:50%;margin-right:6px;vertical-align:-1px;font-style:normal}
.board-legend .i-b{background:linear-gradient(135deg,#2563eb,#38bdf8)}
.board-legend .i-p{background:linear-gradient(135deg,#ef4444,#f97316)}
.board-legend .i-t{background:rgba(148,163,184,.5)}
.board-signal{
  margin-top:16px;padding:14px 16px;border-radius:var(--radius-sm);
  background:rgba(37,99,235,.14);
  border:1px solid var(--line-strong);
  font-size:13.5px;color:#dbeafe;line-height:1.6;
}
.board-signal b{color:#fff}

/* ---------- METRICS ---------- */
.metric-layout{display:grid;grid-template-columns:1fr 1.15fr;gap:48px;align-items:center}
.metric-visual{position:relative;border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow)}
.metric-visual img{width:100%;height:100%;object-fit:cover;aspect-ratio:4/3;opacity:.88}
.metric-visual::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(3,7,18,.12),rgba(3,7,18,.82))}
.metric-float{
  position:absolute;left:18px;right:18px;bottom:18px;
  background:rgba(3,7,18,.82);
  border:1px solid var(--line-strong);
  border-radius:var(--radius-sm);
  padding:14px 16px;
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
}
.metric-float strong{display:block;font-size:22px;font-weight:800;color:var(--cyan);line-height:1.1}
.metric-float span{font-size:12.5px;color:var(--muted)}
.metric-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.metric{
  padding:22px 20px;
  border-radius:var(--radius-sm);
  background:linear-gradient(160deg,rgba(56,189,248,.09),rgba(8,18,41,.6));
  border:1px solid var(--line);
  transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.metric:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:var(--glow-cyan)}
.metric b{display:block;font-size:30px;font-weight:800;letter-spacing:-.03em;background:linear-gradient(120deg,#fff,#38bdf8);-webkit-background-clip:text;background-clip:text;color:transparent}
.metric span{display:block;margin-top:6px;font-size:13.5px;color:var(--muted);line-height:1.55}

/* ---------- BOARD MATRIX ---------- */
.matrix-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.matrix-item{
  position:relative;
  padding:26px 24px 24px;
  border-radius:var(--radius);
  background:rgba(8,18,41,.55);
  border:1px solid var(--line);
  transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.matrix-item:hover{transform:translateY(-5px);border-color:var(--line-strong);box-shadow:var(--glow-cyan)}
.matrix-item .idx{
  display:inline-grid;place-items:center;
  width:34px;height:34px;border-radius:10px;
  font-size:13px;font-weight:800;
  color:#02101f;
  background:linear-gradient(135deg,var(--blue),var(--cyan));
  margin-bottom:16px;
}
.matrix-item h3{font-size:17px;font-weight:700;margin-bottom:9px}
.matrix-item p{font-size:14px;color:var(--muted);line-height:1.68}
.matrix-item .tag{margin-top:16px}

/* ---------- COMPARE ---------- */
.compare{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.compare-col{padding:28px 26px;border-radius:var(--radius);border:1px solid var(--line);background:rgba(8,18,41,.5)}
.compare-col.is-weak{border-color:rgba(148,163,184,.22);background:rgba(15,23,42,.5)}
.compare-col.is-strong{border-color:var(--line-strong);background:linear-gradient(160deg,rgba(37,99,235,.16),rgba(8,18,41,.68));box-shadow:var(--glow)}
.compare-col h3{font-size:18px;font-weight:700;margin-bottom:6px}
.compare-col > p{font-size:13.5px;color:var(--muted);margin-bottom:20px}
.compare-list li{
  display:flex;gap:12px;
  padding:12px 0;
  font-size:14px;
  color:#cbd5e1;
  line-height:1.62;
  border-bottom:1px dashed var(--line);
}
.compare-list li:last-child{border-bottom:0;padding-bottom:0}
.compare-list .mark{
  flex:0 0 22px;width:22px;height:22px;border-radius:7px;
  display:grid;place-items:center;font-size:12px;font-weight:800;
}
.is-weak .mark{background:rgba(239,68,68,.16);color:#fca5a5}
.is-strong .mark{background:rgba(16,185,129,.18);color:#6ee7b7}

/* ---------- TIMELINE ---------- */
.timeline{position:relative;display:grid;gap:18px}
.tl-item{
  display:grid;grid-template-columns:64px 1fr;gap:22px;
  padding:24px 26px;
  border-radius:var(--radius);
  background:rgba(8,18,41,.5);
  border:1px solid var(--line);
  transition:border-color .25s ease,transform .25s ease;
}
.tl-item:hover{border-color:var(--line-strong);transform:translateX(4px)}
.tl-num{
  width:52px;height:52px;border-radius:16px;
  display:grid;place-items:center;
  font-size:17px;font-weight:800;
  color:var(--cyan);
  background:rgba(56,189,248,.1);
  border:1px solid var(--line-strong);
}
.tl-body h3{font-size:17px;font-weight:700;margin-bottom:8px}
.tl-body p{font-size:14px;color:var(--muted);line-height:1.68}
.tl-body .tag{margin-top:12px}

/* ---------- CHANNELS ---------- */
.channel-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.channel-card{
  display:flex;flex-direction:column;
  padding:28px 24px;
  border-radius:var(--radius);
  background:linear-gradient(160deg,rgba(56,189,248,.1),rgba(8,18,41,.7));
  border:1px solid var(--line);
  transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.channel-card:hover{transform:translateY(-5px);border-color:var(--line-strong);box-shadow:var(--glow-cyan)}
.channel-card.is-current{border-color:var(--line-strong);box-shadow:var(--glow)}
.channel-card h3{font-size:18px;font-weight:700;margin:14px 0 10px}
.channel-card p{font-size:14px;color:var(--muted);line-height:1.68;margin-bottom:20px}
.channel-card .link-go{margin-top:auto;font-size:13.5px;font-weight:700;color:var(--cyan)}
.channel-card .link-go::after{content:"→";margin-left:8px;transition:margin .2s ease}
.channel-card:hover .link-go::after{margin-left:14px}

/* ---------- NEWS ---------- */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.news-card{
  display:flex;flex-direction:column;
  padding:24px 22px;
  border-radius:var(--radius-sm);
  background:rgba(8,18,41,.55);
  border:1px solid var(--line);
  transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.news-card:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:var(--glow-cyan)}
.news-meta{font-size:12px;color:var(--cyan);letter-spacing:.04em;text-transform:uppercase;font-weight:700}
.news-card h3{font-size:16px;font-weight:700;margin:12px 0 10px;line-height:1.45}
.news-card p{font-size:13.5px;color:var(--muted);line-height:1.65;margin-bottom:18px}
.news-more{margin-top:auto;font-size:13px;font-weight:700;color:var(--holo)}
.empty-note{
  grid-column:1/-1;
  padding:28px;border-radius:var(--radius-sm);
  border:1px dashed var(--line-strong);
  color:var(--muted);font-size:14px;text-align:center;
  background:rgba(8,18,41,.4);
}

/* ---------- ASSURANCE ---------- */
.assure-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.assure-item{padding:24px 20px;border-radius:var(--radius-sm);border:1px solid var(--line);background:rgba(8,18,41,.5)}
.assure-item .ico{
  width:40px;height:40px;border-radius:12px;display:grid;place-items:center;
  font-size:17px;margin-bottom:14px;
  background:rgba(56,189,248,.12);border:1px solid var(--line-strong);color:var(--cyan);
}
.assure-item h3{font-size:15.5px;font-weight:700;margin-bottom:8px}
.assure-item p{font-size:13.5px;color:var(--muted);line-height:1.62}

/* ---------- FAQ ---------- */
.faq-list{display:grid;gap:14px;max-width:920px}
.faq-item{
  border-radius:var(--radius-sm);
  border:1px solid var(--line);
  background:rgba(8,18,41,.5);
  overflow:hidden;
  transition:border-color .22s ease,box-shadow .22s ease;
}
.faq-item[open]{border-color:var(--line-strong);box-shadow:0 0 24px rgba(37,99,235,.22)}
.faq-item summary{
  cursor:pointer;
  list-style:none;
  padding:19px 22px;
  font-size:15.5px;font-weight:600;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:"+";
  flex:0 0 26px;width:26px;height:26px;border-radius:8px;
  display:grid;place-items:center;
  font-size:16px;font-weight:700;color:var(--cyan);
  background:rgba(56,189,248,.12);border:1px solid var(--line);
  transition:transform .22s ease;
}
.faq-item[open] summary::after{content:"–";transform:rotate(180deg)}
.faq-item .faq-body{padding:0 22px 22px;font-size:14.5px;color:var(--muted);line-height:1.72}

/* ---------- CTA ---------- */
.cta-wrap{
  position:relative;
  border-radius:26px;
  border:1px solid var(--line-strong);
  background:linear-gradient(160deg,rgba(37,99,235,.24),rgba(8,18,41,.85));
  box-shadow:var(--shadow);
  overflow:hidden;
  padding:48px 44px;
}
.cta-wrap::after{
  content:"";position:absolute;top:-120px;right:-80px;width:340px;height:340px;border-radius:50%;
  background:radial-gradient(circle,rgba(56,189,248,.35),transparent 68%);
  pointer-events:none;
}
.cta-layout{display:grid;grid-template-columns:1.05fr .95fr;gap:44px;align-items:start;position:relative;z-index:1}
.cta-layout h2{font-size:clamp(23px,2.8vw,32px);font-weight:800;margin-bottom:14px}
.cta-layout > div > p{color:#cbd5e1;font-size:15.5px;line-height:1.72}
.cta-points{display:grid;gap:12px;margin-top:24px}
.cta-points li{display:flex;gap:11px;font-size:14px;color:#cbd5e1;align-items:flex-start}
.cta-points li::before{content:"✓";color:var(--cyan);font-weight:800;flex:0 0 auto}
.cta-form{
  padding:26px 24px;
  border-radius:var(--radius);
  background:rgba(3,7,18,.72);
  border:1px solid var(--line);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  display:grid;gap:14px;
}
.cta-form h3{font-size:16.5px;font-weight:700}
.field{display:grid;gap:7px}
.field label{font-size:12.5px;font-weight:600;color:var(--muted);letter-spacing:.03em}
.field input,.field select{
  width:100%;
  padding:12px 14px;
  border-radius:var(--radius-xs);
  background:rgba(8,18,41,.8);
  border:1px solid var(--line);
  color:var(--text);
  font-size:14px;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.field input::placeholder{color:#64748b}
.field input:focus,.field select:focus{
  outline:none;border-color:var(--line-strong);box-shadow:0 0 0 3px rgba(56,189,248,.16);
}
.form-note{font-size:12.5px;color:var(--muted);line-height:1.6}

/* ---------- FOOTER ---------- */
.site-footer{
  position:relative;z-index:1;
  margin-top:20px;
  padding:66px 0 26px;
  background:linear-gradient(180deg,rgba(3,7,18,.2),rgba(8,18,41,.9));
  border-top:1px solid var(--line);
}
.footer-top{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:34px}
.footer-brand p{color:var(--muted);font-size:13.8px;line-height:1.7;margin:18px 0 18px;max-width:420px}
.badge-row{display:flex;flex-wrap:wrap;gap:8px}
.badge{
  font-size:11px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;
  padding:5px 11px;border-radius:999px;
  color:#cbd5e1;background:rgba(56,189,248,.08);border:1px solid var(--line);
}
.footer-col h4{font-size:13.5px;font-weight:700;letter-spacing:.05em;text-transform:uppercase;color:#dbeafe;margin-bottom:16px}
.footer-col ul{display:grid;gap:10px}
.footer-col li,.footer-col a{font-size:13.8px;color:var(--muted)}
.footer-col a:hover{color:var(--cyan)}
.footer-bottom{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;
  margin-top:44px;padding-top:20px;border-top:1px solid var(--line);
}
.footer-bottom p{font-size:12.8px;color:var(--muted)}

/* ---------- FAB (Option 2: Cyber Neon) ---------- */
.fab{
  position:fixed;
  left:16px;bottom:96px;
  z-index:50;
  display:inline-flex;align-items:center;gap:10px;
  min-height:56px;
  padding:12px 20px;
  border-radius:999px;
  background:rgba(7,7,13,.8);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border:1.5px solid transparent;
  background-image:linear-gradient(rgba(7,7,13,.86),rgba(7,7,13,.86)),linear-gradient(120deg,#38bdf8,#2563eb,#38bdf8);
  background-origin:border-box;
  background-clip:padding-box,border-box;
  box-shadow:0 0 20px rgba(56,189,248,.42);
  opacity:.78;
  transition:opacity .25s ease,transform .25s ease,box-shadow .25s ease;
  animation:fabPulse 3.2s ease-in-out infinite;
}
@keyframes fabPulse{
  0%,100%{box-shadow:0 0 18px rgba(56,189,248,.35)}
  50%{box-shadow:0 0 30px rgba(56,189,248,.62)}
}
.fab:hover{opacity:1;transform:translateY(-3px) scale(1.04);box-shadow:0 0 34px rgba(56,189,248,.8)}
.fab:active{transform:translateY(1px) scale(.96)}
.fab .fab-ico{font-size:18px;line-height:1;animation:fabFlicker 2.4s steps(1,end) infinite}
@keyframes fabFlicker{0%,92%,100%{opacity:1}94%{opacity:.35}96%{opacity:1}98%{opacity:.5}}
.fab .fab-txt{display:flex;flex-direction:column;line-height:1.15}
.fab .fab-txt strong{font-size:12.8px;font-weight:700;color:#f8fafc}
.fab .fab-txt small{font-size:10.5px;color:var(--cyan)}
.fab .fab-dot{
  position:absolute;top:-3px;right:-3px;
  width:12px;height:12px;border-radius:50%;
  background:#ec4899;
  box-shadow:0 0 12px rgba(236,72,153,.9);
  animation:pulse 1.3s infinite;
}

/* ---------- RESPONSIVE ---------- */
@media (max-width:1080px){
  .hero-layout{grid-template-columns:1fr;gap:38px}
  .metric-layout{grid-template-columns:1fr;gap:34px}
  .matrix-grid{grid-template-columns:repeat(2,1fr)}
  .news-grid{grid-template-columns:repeat(2,1fr)}
  .assure-grid{grid-template-columns:repeat(2,1fr)}
  .channel-grid{grid-template-columns:1fr}
  .footer-top{grid-template-columns:1fr 1fr;gap:30px}
}
@media (max-width:960px){
  .main-nav{
    position:absolute;
    top:74px;left:0;right:0;
    flex-direction:column;
    align-items:stretch;
    gap:6px;
    padding:16px 20px 22px;
    background:rgba(3,7,18,.97);
    border-bottom:1px solid var(--line);
    box-shadow:var(--shadow);
    display:none;
  }
  .main-nav.is-open{display:flex}
  .nav-link{padding:12px 14px;border-radius:12px}
  .nav-toggle{display:flex}
  .header-inner{gap:12px}
  .brand-text small{display:none}
  .brand-text strong{font-size:14px}
  .section{padding:66px 0}
  .compare{grid-template-columns:1fr}
  .cta-layout{grid-template-columns:1fr;gap:30px}
  .cta-wrap{padding:34px 24px}
}
@media (max-width:640px){
  .container{padding:0 16px}
  .hero{padding:112px 0 62px}
  .hero h1{font-size:26px}
  .hero-actions .btn{width:100%}
  .btn{padding:12px 20px;font-size:14.5px}
  .brand-text strong{font-size:13px}
  .brand-mark{width:38px;height:38px;flex:0 0 38px;font-size:17px}
  .metric-grid{grid-template-columns:1fr}
  .matrix-grid{grid-template-columns:1fr}
  .news-grid{grid-template-columns:1fr}
  .assure-grid{grid-template-columns:1fr}
  .tl-item{grid-template-columns:1fr;gap:14px;padding:22px 18px}
  .tl-num{width:44px;height:44px;font-size:15px;border-radius:13px}
  .board{grid-template-columns:repeat(5,1fr);gap:6px;padding:12px}
  .faq-item summary{padding:16px 16px;font-size:14.5px}
  .faq-item .faq-body{padding:0 16px 18px;font-size:14px}
  .footer-top{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column}
  .fab{left:12px;bottom:82px;padding:10px 16px;min-height:52px}
  .fab .fab-txt small{display:none}
}
@media print{
  .site-header,.fab,.jump-row{display:none}
}