/* roulang page: index */
:root{
  --bg:#020A14;
  --bg-soft:#04121F;
  --bg-deep:#010710;
  --panel:rgba(9,28,46,.74);
  --panel-solid:#071B2C;
  --stroke:rgba(56,189,248,.18);
  --stroke-strong:rgba(34,211,238,.5);
  --text:#EAF6FF;
  --muted:#8FA6BD;
  --muted-2:#6C8299;
  --cyan:#22D3EE;
  --blue:#2E7DF7;
  --teal:#0EA5A5;
  --leaf:#5EEAD4;
  --gold:#F5C451;
  --danger:#FB7185;
  --radius-lg:24px;
  --radius:16px;
  --radius-sm:10px;
  --shadow:0 18px 45px rgba(0,0,0,.45);
  --shadow-soft:0 10px 30px rgba(0,0,0,.32);
  --glow:0 0 22px rgba(34,211,238,.35);
  --glow-strong:0 0 34px rgba(34,211,238,.5);
  --maxw:1200px;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:'Be Vietnam Pro',system-ui,-apple-system,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;
  font-size:16px;
  line-height:1.66;
  color:var(--text);
  background-color:var(--bg);
  background-image:
    radial-gradient(1100px 620px at 10% -10%, rgba(34,211,238,.16), transparent 60%),
    radial-gradient(900px 560px at 90% 2%, rgba(46,125,247,.18), transparent 62%),
    linear-gradient(180deg,#020A14 0%,#04121F 42%,#020A14 100%);
  background-attachment:fixed;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
button,input{font:inherit;color:inherit}
ul,ol{margin:0;padding:0;list-style:none}
p{margin:0 0 14px}
h1,h2,h3,h4{margin:0 0 12px;line-height:1.3;font-weight:700;letter-spacing:-.01em}
h1{font-size:clamp(1.6rem,3.1vw,2.5rem);line-height:1.24}
h2{font-size:clamp(1.4rem,2.4vw,2.05rem)}
h3{font-size:clamp(1.05rem,1.5vw,1.28rem)}
h4{font-size:1rem}
strong{font-weight:700}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:8px}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 20px}
.section{position:relative;padding:74px 0;border-top:1px solid rgba(56,189,248,.09)}
.section--plain{border-top:0}
.section--deep{background:linear-gradient(180deg,rgba(2,10,20,.35),rgba(4,18,31,.72) 40%,rgba(2,10,20,.4))}
.section--band{background:
  radial-gradient(700px 320px at 15% 0%, rgba(14,165,165,.16), transparent 65%),
  linear-gradient(180deg,rgba(4,18,31,.9),rgba(2,10,20,.55))}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:.72rem;font-weight:600;letter-spacing:.14em;text-transform:uppercase;
  color:var(--cyan);background:rgba(34,211,238,.09);
  border:1px solid rgba(34,211,238,.28);border-radius:999px;
  padding:6px 13px;margin-bottom:16px;
}
.section-head{max-width:780px;margin-bottom:34px}
.section-head p{color:var(--muted);margin:10px 0 0;font-size:1rem}
.section-head--split{max-width:none;display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);gap:28px;align-items:end}
.lead{color:var(--muted)}
.muted{color:var(--muted)}
.glass{
  background:linear-gradient(160deg,rgba(11,34,54,.86),rgba(5,17,30,.7));
  border:1px solid var(--stroke);
  border-radius:var(--radius);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  box-shadow:var(--shadow-soft);
  transition:transform .3s ease,border-color .3s ease,box-shadow .3s ease;
}
.glass:hover{transform:translateY(-4px);border-color:var(--stroke-strong);box-shadow:var(--shadow)}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  padding:12px 22px;border-radius:999px;border:1px solid transparent;
  font-weight:600;font-size:.94rem;cursor:pointer;
  transition:transform .22s ease,box-shadow .22s ease,background .22s ease,color .22s ease,border-color .22s ease;
  white-space:nowrap;
}
.btn--primary{
  background:linear-gradient(120deg,var(--cyan),var(--blue));
  color:#03121F;font-weight:700;
  box-shadow:var(--glow);
}
.btn--primary:hover{transform:translateY(-2px);box-shadow:var(--glow-strong)}
.btn--primary:active{transform:translateY(0) scale(.98)}
.btn--ghost{
  background:rgba(34,211,238,.06);
  border-color:rgba(34,211,238,.4);
  color:#CFF6FF;
}
.btn--ghost:hover{background:rgba(34,211,238,.15);border-color:var(--cyan);transform:translateY(-2px)}
.btn--outline{
  background:transparent;border-color:rgba(148,166,189,.35);color:var(--text);
}
.btn--outline:hover{border-color:var(--cyan);color:var(--cyan);transform:translateY(-2px)}
.btn--sm{padding:9px 16px;font-size:.85rem}
.tag{
  display:inline-block;font-size:.7rem;font-weight:600;letter-spacing:.1em;text-transform:uppercase;
  padding:4px 10px;border-radius:999px;color:var(--leaf);
  background:rgba(94,234,212,.1);border:1px solid rgba(94,234,212,.28);
}
.tag--gold{color:var(--gold);background:rgba(245,196,81,.1);border-color:rgba(245,196,81,.3)}
.tag--danger{color:var(--danger);background:rgba(251,113,133,.1);border-color:rgba(251,113,133,.3)}

/* HEADER */
.site-header{position:sticky;top:0;z-index:60;background:rgba(2,10,20,.86);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border-bottom:1px solid rgba(56,189,248,.14)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:13px 0}
.brand{display:flex;align-items:center;gap:12px;min-width:0}
.brand__mark{
  flex:0 0 auto;width:44px;height:44px;border-radius:14px;display:grid;place-items:center;
  background:linear-gradient(140deg,var(--teal),var(--blue));
  color:#03121F;font-size:1.05rem;box-shadow:var(--glow);
}
.brand__text{min-width:0}
.brand__text strong{display:block;font-size:.97rem;font-weight:700;line-height:1.25;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.brand__text small{display:block;font-size:.68rem;letter-spacing:.13em;text-transform:uppercase;color:var(--muted-2)}
.header-actions{display:flex;align-items:center;gap:9px;flex:0 0 auto}
.main-nav{border-top:1px solid rgba(56,189,248,.1);background:rgba(3,12,22,.55)}
.nav-scroll{display:flex;gap:6px;overflow-x:auto;padding:8px 20px;scrollbar-width:none}
.nav-scroll::-webkit-scrollbar{display:none}
.nav-link{
  padding:9px 15px;border-radius:11px;font-size:.88rem;font-weight:500;color:var(--muted);
  white-space:nowrap;border:1px solid transparent;transition:.24s ease;
}
.nav-link:hover{color:var(--text);background:rgba(34,211,238,.08);border-color:rgba(34,211,238,.24)}
.nav-link.is-active{
  color:#03121F;font-weight:700;
  background:linear-gradient(120deg,var(--cyan),var(--leaf));
  box-shadow:0 0 16px rgba(34,211,238,.35);
}

/* HERO */
.hero{position:relative;padding:52px 0 66px;overflow:hidden}
.hero::before{
  content:"";position:absolute;inset:0;
  background:url('/assets/images/28ccd10893611532.jpg') center/cover no-repeat;
  opacity:.3;filter:saturate(1.05);
}
.hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(2,10,20,.62) 0%,rgba(2,10,20,.9) 62%,var(--bg) 100%);
}
.hero .container{position:relative;z-index:2}
.hero-grid{display:grid;grid-template-columns:minmax(0,.86fr) minmax(0,1.5fr) minmax(0,.86fr);gap:24px;align-items:center}
.hero-side{display:flex;flex-direction:column;gap:16px}
.hero-side__item{padding:16px 18px;border-radius:var(--radius);border:1px solid var(--stroke);background:rgba(6,20,34,.62);backdrop-filter:blur(10px)}
.hero-side__item i{color:var(--cyan);font-size:.95rem;margin-bottom:8px;display:block}
.hero-side__item h3{font-size:.95rem;margin-bottom:6px}
.hero-side__item p{margin:0;font-size:.85rem;color:var(--muted);line-height:1.6}
.hero-stage{text-align:center;padding:8px 6px}
.hero-stage h1{margin:16px 0 14px}
.hero-lead{color:#BFD6E8;font-size:1rem;max-width:660px;margin:0 auto 22px;line-height:1.72}
.hero-actions{display:flex;justify-content:center;gap:12px;flex-wrap:wrap;margin-bottom:26px}
.hero-shot{
  margin:0 auto;max-width:600px;border-radius:var(--radius-lg);overflow:hidden;
  border:1px solid rgba(34,211,238,.34);box-shadow:0 26px 60px rgba(0,0,0,.55),0 0 30px rgba(34,211,238,.18);
  background:rgba(3,12,22,.6);
}
.hero-metrics{display:flex;flex-wrap:wrap;justify-content:center;gap:10px 22px;margin-top:24px}
.hero-metrics li{font-size:.84rem;color:var(--muted);display:flex;align-items:center;gap:8px}
.hero-metrics li i{color:var(--leaf)}

/* KPI */
.kpi{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px}
.kpi__item{padding:24px 20px;border-radius:var(--radius);border:1px solid var(--stroke);background:linear-gradient(165deg,rgba(10,32,52,.86),rgba(4,15,27,.68));backdrop-filter:blur(12px)}
.kpi__num{font-size:clamp(1.5rem,2.6vw,2.1rem);font-weight:800;color:#fff;letter-spacing:-.02em;line-height:1.1}
.kpi__num span{font-size:.95rem;color:var(--cyan);font-weight:600;margin-left:4px}
.kpi__label{margin-top:8px;font-size:.86rem;color:var(--muted)}

/* FEATURE LIST */
.feature-row{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.feature{padding:26px 24px;border-radius:var(--radius);border:1px solid var(--stroke);background:rgba(6,22,38,.6);position:relative;overflow:hidden;transition:.3s ease}
.feature:hover{border-color:var(--stroke-strong);transform:translateY(-4px);background:rgba(8,28,46,.8)}
.feature__idx{font-size:.78rem;font-weight:700;color:var(--cyan);letter-spacing:.16em}
.feature h3{margin:12px 0 8px}
.feature p{margin:0;color:var(--muted);font-size:.9rem}

/* GRID */
.grid{display:grid;gap:20px}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--4{grid-template-columns:repeat(4,minmax(0,1fr))}
.grid--6{grid-template-columns:repeat(3,minmax(0,1fr))}
.matrix-card{padding:24px 22px;border-radius:var(--radius);border:1px solid var(--stroke);background:linear-gradient(160deg,rgba(8,26,44,.82),rgba(4,14,26,.65));backdrop-filter:blur(12px);transition:.3s ease}
.matrix-card:hover{transform:translateY(-4px);border-color:var(--stroke-strong);box-shadow:var(--shadow)}
.matrix-card i{font-size:1.15rem;color:var(--cyan);width:44px;height:44px;border-radius:12px;display:grid;place-items:center;background:rgba(34,211,238,.1);border:1px solid rgba(34,211,238,.24);margin-bottom:14px}
.matrix-card h3{font-size:1.02rem;margin-bottom:8px}
.matrix-card p{margin:0;color:var(--muted);font-size:.88rem}

/* STEPS */
.steps-layout{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:34px;align-items:center}
.step{display:flex;gap:18px;padding:18px 0;border-bottom:1px dashed rgba(56,189,248,.18)}
.step:last-child{border-bottom:0}
.step__no{
  flex:0 0 auto;width:44px;height:44px;border-radius:13px;display:grid;place-items:center;
  font-weight:800;color:#03121F;background:linear-gradient(140deg,var(--leaf),var(--cyan));
  box-shadow:0 0 16px rgba(34,211,238,.35);
}
.step h3{margin-bottom:6px;font-size:1.02rem}
.step p{margin:0;color:var(--muted);font-size:.9rem}
.steps-media{border-radius:var(--radius-lg);overflow:hidden;border:1px solid var(--stroke);box-shadow:var(--shadow)}
.steps-media figcaption{padding:12px 18px;font-size:.8rem;color:var(--muted);background:rgba(3,12,22,.85);border-top:1px solid rgba(56,189,248,.14)}

/* TECH STACK */
.tech-layout{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);gap:34px;align-items:start}
.tech-item{padding:20px 22px;border-radius:var(--radius);border:1px solid var(--stroke);background:rgba(5,18,32,.66);margin-bottom:14px;transition:.3s ease}
.tech-item:hover{border-color:var(--stroke-strong);background:rgba(8,28,46,.8)}
.tech-item h3{font-size:1rem;margin-bottom:8px;display:flex;gap:10px;align-items:flex-start}
.tech-item h3 i{color:var(--leaf);margin-top:4px}
.tech-item p{margin:0;color:var(--muted);font-size:.89rem}
.tech-visual{border-radius:var(--radius-lg);overflow:hidden;border:1px solid var(--stroke);box-shadow:var(--shadow)}

/* COMPARE */
.compare{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,.95fr);gap:26px;align-items:start}
.compare-table{width:100%;border-collapse:separate;border-spacing:0;overflow:hidden;border-radius:var(--radius);border:1px solid var(--stroke);background:rgba(5,18,32,.6)}
.compare-table th,.compare-table td{padding:15px 18px;text-align:left;font-size:.9rem;border-bottom:1px solid rgba(56,189,248,.12)}
.compare-table thead th{font-size:.76rem;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);background:rgba(34,211,238,.07)}
.compare-table tbody tr:last-child td{border-bottom:0}
.compare-table td:first-child{color:var(--muted);width:34%}
.compare-table td.good{color:var(--leaf);font-weight:600}
.compare-table td.bad{color:var(--muted-2)}
.compare-note{padding:24px;border-radius:var(--radius);border:1px solid var(--stroke);background:linear-gradient(165deg,rgba(10,34,54,.8),rgba(4,15,27,.66))}
.compare-note h3{margin-bottom:10px}
.compare-note p{margin:0;color:var(--muted);font-size:.9rem}

/* TIMELINE */
.timeline{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px;position:relative}
.timeline::before{content:"";position:absolute;top:19px;left:5%;right:5%;height:1px;background:linear-gradient(90deg,rgba(34,211,238,.5),rgba(46,125,247,.15))}
.milestone{position:relative;padding-top:52px}
.milestone__dot{position:absolute;top:10px;left:0;width:18px;height:18px;border-radius:50%;background:var(--bg);border:2px solid var(--cyan);box-shadow:0 0 14px rgba(34,211,238,.6)}
.milestone h3{font-size:.98rem;margin-bottom:6px}
.milestone p{margin:0;color:var(--muted);font-size:.86rem}

/* REVIEWS */
.review-layout{display:grid;grid-template-columns:minmax(0,.8fr) minmax(0,1.2fr);gap:26px}
.rating-panel{padding:28px 24px;border-radius:var(--radius);border:1px solid rgba(245,196,81,.28);background:linear-gradient(165deg,rgba(38,29,10,.55),rgba(6,18,30,.8))}
.rating-score{font-size:2.7rem;font-weight:800;color:var(--gold);line-height:1}
.rating-stars{color:var(--gold);margin:8px 0 12px;letter-spacing:3px}
.rating-panel p{margin:0;color:var(--muted);font-size:.88rem}
.review-list{display:grid;gap:14px}
.review{padding:20px 22px;border-radius:var(--radius);border:1px solid var(--stroke);background:rgba(5,18,32,.66)}
.review p{margin:0 0 12px;font-size:.92rem;color:#CFE3F2}
.review__meta{display:flex;align-items:center;gap:10px;font-size:.8rem;color:var(--muted)}
.review__avatar{width:34px;height:34px;border-radius:50%;display:grid;place-items:center;font-weight:700;color:#03121F;background:linear-gradient(140deg,var(--cyan),var(--leaf));font-size:.82rem}

/* TOPICS */
.topic-card{overflow:hidden;border-radius:var(--radius-lg);border:1px solid var(--stroke);background:rgba(5,18,32,.7);transition:.32s ease;display:flex;flex-direction:column}
.topic-card:hover{transform:translateY(-5px);border-color:var(--stroke-strong);box-shadow:var(--shadow)}
.topic-card__media{position:relative;aspect-ratio:16/10;overflow:hidden}
.topic-card__media img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.topic-card:hover .topic-card__media img{transform:scale(1.06)}
.topic-card__media::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(2,10,20,.05),rgba(2,10,20,.85))}
.topic-card__body{padding:20px 20px 24px}
.topic-card__body h3{font-size:1.06rem;margin-bottom:8px}
.topic-card__body p{margin:0 0 14px;color:var(--muted);font-size:.88rem}
.topic-link{font-size:.85rem;font-weight:600;color:var(--cyan);display:inline-flex;align-items:center;gap:8px}
.topic-card:hover .topic-link{gap:12px}

/* RANKING */
.rank-list{display:grid;gap:12px}
.rank-item{display:grid;grid-template-columns:52px 76px minmax(0,1fr) auto;gap:16px;align-items:center;padding:14px 18px;border-radius:var(--radius);border:1px solid var(--stroke);background:rgba(5,18,32,.6);transition:.28s ease}
.rank-item:hover{border-color:var(--stroke-strong);background:rgba(8,28,46,.8);transform:translateX(4px)}
.rank-item__no{font-weight:800;font-size:1.15rem;color:var(--cyan)}
.rank-item__thumb{width:76px;height:56px;border-radius:10px;overflow:hidden;border:1px solid rgba(56,189,248,.2)}
.rank-item__thumb img{width:100%;height:100%;object-fit:cover}
.rank-item h3{font-size:.98rem;margin:0 0 4px}
.rank-item p{margin:0;color:var(--muted);font-size:.84rem}
.rank-item__meta{text-align:right;font-size:.84rem;color:var(--leaf);font-weight:600;white-space:nowrap}

/* TIERS */
.tier{padding:24px 20px;border-radius:var(--radius);border:1px solid var(--stroke);background:linear-gradient(170deg,rgba(8,26,44,.82),rgba(4,14,26,.6));display:flex;flex-direction:column}
.tier--top{border-color:rgba(245,196,81,.42);box-shadow:0 0 26px rgba(245,196,81,.12)}
.tier h3{margin-bottom:6px;font-size:1.02rem}
.tier__price{font-size:1.3rem;font-weight:800;color:var(--cyan);margin-bottom:12px}
.tier__price small{font-size:.78rem;color:var(--muted-2);font-weight:500}
.tier ul{margin:0 0 18px;display:grid;gap:9px}
.tier li{font-size:.86rem;color:var(--muted);display:flex;gap:9px;align-items:flex-start}
.tier li i{color:var(--leaf);margin-top:5px;font-size:.74rem}
.tier__bar{margin-top:auto;height:6px;border-radius:999px;background:rgba(148,166,189,.16);overflow:hidden}
.tier__bar span{display:block;height:100%;border-radius:999px;background:linear-gradient(90deg,var(--cyan),var(--leaf))}

/* CALENDAR */
.calendar{display:grid;gap:10px}
.cal-row{display:grid;grid-template-columns:120px minmax(0,1fr) auto;gap:16px;align-items:center;padding:14px 18px;border-radius:var(--radius-sm);border:1px solid rgba(56,189,248,.14);background:rgba(5,18,32,.5);transition:.25s ease}
.cal-row:hover{border-color:var(--stroke-strong);background:rgba(8,28,46,.72)}
.cal-row__date{font-size:.78rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--cyan)}
.cal-row__title{font-size:.92rem}
.cal-row__tag{font-size:.76rem;color:var(--muted)}

/* GALLERY */
.gallery-scroll{display:flex;gap:16px;overflow-x:auto;padding:6px 4px 18px;scroll-snap-type:x mandatory}
.gallery-scroll::-webkit-scrollbar{height:6px}
.gallery-scroll::-webkit-scrollbar-thumb{background:rgba(34,211,238,.35);border-radius:999px}
.gallery-item{flex:0 0 300px;scroll-snap-align:start;border-radius:var(--radius);overflow:hidden;border:1px solid var(--stroke);background:rgba(5,18,32,.6)}
.gallery-item img{width:100%;aspect-ratio:16/10;object-fit:cover}
.gallery-item span{display:block;padding:12px 16px;font-size:.84rem;color:var(--muted)}

/* NEWS */
.news-layout{display:grid;grid-template-columns:minmax(0,1.6fr) minmax(0,.9fr);gap:26px;align-items:start}
.news-list{display:grid;gap:12px}
.news-item{display:block;padding:20px 22px;border-radius:var(--radius);border:1px solid var(--stroke);background:rgba(5,18,32,.6);transition:.28s ease}
.news-item:hover{border-color:var(--stroke-strong);background:rgba(8,28,46,.82);transform:translateY(-3px)}
.news-item__meta{font-size:.76rem;color:var(--cyan);letter-spacing:.06em;text-transform:uppercase;margin-bottom:8px;display:block}
.news-item h3{font-size:1rem;margin-bottom:8px}
.news-item p{margin:0;color:var(--muted);font-size:.86rem}
.news-side{padding:22px 20px;border-radius:var(--radius);border:1px solid var(--stroke);background:linear-gradient(170deg,rgba(10,32,52,.85),rgba(4,15,27,.7))}
.news-side h3{font-size:.95rem;margin-bottom:14px;display:flex;align-items:center;gap:9px}
.news-side h3 i{color:var(--gold)}
.news-side ul{display:grid;gap:12px}
.news-side li a{display:block;font-size:.87rem;color:#CBE0F0;transition:.24s ease}
.news-side li a:hover{color:var(--cyan)}
.news-side li span{display:block;font-size:.75rem;color:var(--muted-2);margin-top:4px}
.empty-note{padding:24px;border-radius:var(--radius);border:1px dashed rgba(56,189,248,.3);color:var(--muted);font-size:.9rem;text-align:center}
.news-more{display:inline-flex;align-items:center;gap:9px;margin-top:18px;font-size:.88rem;font-weight:600;color:var(--cyan)}

/* SCENARIOS */
.scene{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:18px}
.scene-item{padding:22px;border-radius:var(--radius);border:1px solid var(--stroke);background:rgba(5,18,32,.58)}
.scene-item h3{font-size:1rem;margin-bottom:8px}
.scene-item p{margin:0;color:var(--muted);font-size:.88rem}

/* TRUST */
.trust-bar{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px;padding:26px;border-radius:var(--radius-lg);border:1px solid var(--stroke);background:linear-gradient(150deg,rgba(9,30,50,.9),rgba(4,14,26,.7))}
.trust-item{display:flex;gap:14px;align-items:flex-start}
.trust-item i{font-size:1.05rem;color:var(--cyan);width:42px;height:42px;flex:0 0 auto;border-radius:12px;display:grid;place-items:center;background:rgba(34,211,238,.1);border:1px solid rgba(34,211,238,.24)}
.trust-item h3{font-size:.92rem;margin-bottom:5px}
.trust-item p{margin:0;font-size:.82rem;color:var(--muted)}

/* FAQ */
.faq{display:grid;gap:12px;max-width:900px}
.faq details{border-radius:var(--radius);border:1px solid var(--stroke);background:rgba(5,18,32,.6);padding:0;overflow:hidden;transition:.25s ease}
.faq details:hover{border-color:var(--stroke-strong)}
.faq summary{
  cursor:pointer;padding:18px 22px;font-weight:600;font-size:.96rem;
  display:flex;align-items:center;justify-content:space-between;gap:14px;list-style:none;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"\f067";font-family:"Font Awesome 6 Free";font-weight:900;font-size:.72rem;color:var(--cyan);transition:transform .25s ease}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq details p{margin:0;padding:0 22px 20px;color:var(--muted);font-size:.9rem}

/* CTA */
.cta-band{
  position:relative;overflow:hidden;border-radius:var(--radius-lg);
  border:1px solid rgba(34,211,238,.32);
  background:linear-gradient(140deg,rgba(11,44,68,.92),rgba(3,14,26,.92));
  padding:46px 40px;text-align:center;
  box-shadow:0 22px 55px rgba(0,0,0,.5),0 0 34px rgba(34,211,238,.16);
}
.cta-band::before{content:"";position:absolute;inset:-40% -10% auto -10%;height:340px;background:radial-gradient(600px 260px at 50% 0%,rgba(34,211,238,.22),transparent 70%)}
.cta-band h2{position:relative;margin-bottom:12px}
.cta-band p{position:relative;color:#BFD6E8;max-width:720px;margin:0 auto 24px;font-size:.98rem}
.cta-actions{position:relative;display:flex;justify-content:center;gap:12px;flex-wrap:wrap}

/* FOOTER */
.site-footer{border-top:1px solid rgba(56,189,248,.14);background:linear-gradient(180deg,rgba(3,12,22,.6),rgba(1,7,16,.95));padding:56px 0 28px;margin-top:12px}
.footer-grid{display:grid;grid-template-columns:minmax(0,1.4fr) repeat(3,minmax(0,.85fr));gap:32px}
.footer-brand p{color:var(--muted);font-size:.86rem;margin:14px 0 0;max-width:400px}
.footer-col h3{font-size:.82rem;letter-spacing:.12em;text-transform:uppercase;color:var(--muted-2);margin-bottom:14px}
.footer-col ul{display:grid;gap:10px}
.footer-col a{font-size:.88rem;color:#C3D6E6;transition:.22s ease}
.footer-col a:hover{color:var(--cyan);padding-left:3px}
.footer-bottom{margin-top:36px;padding-top:20px;border-top:1px solid rgba(56,189,248,.12);display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;align-items:center}
.footer-bottom p{margin:0;font-size:.8rem;color:var(--muted-2)}
.footer-badges{display:flex;gap:10px;flex-wrap:wrap}
.footer-badges span{font-size:.72rem;color:var(--muted);border:1px solid rgba(56,189,248,.2);border-radius:999px;padding:5px 12px}

/* FAB */
.fab{
  position:fixed;left:1rem;bottom:6rem;z-index:50;
  display:inline-flex;align-items:center;gap:10px;
  padding:14px 16px;min-height:56px;border-radius:999px;
  border:1px solid transparent;
  background:
    linear-gradient(rgba(7,20,34,.86),rgba(7,20,34,.86)) padding-box,
    linear-gradient(120deg,var(--cyan),#A3E635) border-box;
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  box-shadow:0 0 20px rgba(34,211,238,.4);
  color:var(--text);font-size:.85rem;font-weight:600;
  opacity:.82;transition:transform .25s ease,opacity .25s ease,box-shadow .25s ease;
}
.fab i{color:var(--cyan);font-size:1.05rem;animation:fabPulse 2.4s ease-in-out infinite}
.fab:hover{opacity:1;transform:scale(1.06);box-shadow:0 0 30px rgba(34,211,238,.6)}
.fab:active{transform:scale(.95)}
.fab__dot{position:absolute;top:-3px;right:-3px;width:12px;height:12px;border-radius:50%;background:#F43F5E;box-shadow:0 0 10px rgba(244,63,94,.9);animation:fabPulse 1.6s ease-in-out infinite}
@keyframes fabPulse{0%,100%{opacity:1;transform:scale(1)}50%{opacity:.55;transform:scale(.9)}}

@media (max-width:1024px){
  .hero-grid{grid-template-columns:1fr;gap:26px}
  .hero-side{flex-direction:row;flex-wrap:wrap}
  .hero-side__item{flex:1 1 220px}
  .kpi{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid--6,.grid--3,.feature-row{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid--4,.trust-bar{grid-template-columns:repeat(2,minmax(0,1fr))}
  .timeline{grid-template-columns:repeat(2,minmax(0,1fr));gap:26px}
  .timeline::before{display:none}
  .steps-layout,.tech-layout,.compare,.review-layout{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:768px){
  .section{padding:56px 0}
  .section-head--split{grid-template-columns:1fr;gap:12px}
  .grid--6,.grid--3,.grid--4,.grid--2,.feature-row,.scene{grid-template-columns:1fr}
  .rank-item{grid-template-columns:40px 60px minmax(0,1fr);gap:12px}
  .rank-item__meta{display:none}
  .cal-row{grid-template-columns:1fr;gap:6px}
  .hero{padding:38px 0 52px}
  .cta-band{padding:34px 22px}
  .brand__text small{display:none}
  .header-inner{flex-wrap:nowrap}
}
@media (max-width:520px){
  .container{padding:0 15px}
  .kpi{grid-template-columns:1fr}
  .hero-actions .btn,.cta-actions .btn{width:100%}
  .header-actions .btn{padding:9px 13px;font-size:.8rem}
  .brand__text strong{font-size:.86rem}
  .trust-bar{padding:20px}
  .footer-grid{grid-template-columns:1fr}
  .fab span.fab__label{display:none}
  .fab{padding:14px}
}

/* roulang page: article */
:root{
  --bg:#020A14;
  --bg-soft:#04121F;
  --bg-deep:#010710;
  --panel:rgba(9,28,46,.74);
  --panel-solid:#071B2C;
  --stroke:rgba(56,189,248,.18);
  --stroke-strong:rgba(34,211,238,.5);
  --text:#EAF6FF;
  --muted:#8FA6BD;
  --muted-2:#6C8299;
  --cyan:#22D3EE;
  --blue:#2E7DF7;
  --teal:#0EA5A5;
  --leaf:#5EEAD4;
  --gold:#F5C451;
  --danger:#FB7185;
  --radius-lg:24px;
  --radius:16px;
  --radius-sm:10px;
  --shadow:0 18px 45px rgba(0,0,0,.45);
  --shadow-soft:0 10px 30px rgba(0,0,0,.32);
  --glow:0 0 22px rgba(34,211,238,.35);
  --glow-strong:0 0 34px rgba(34,211,238,.5);
  --maxw:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:'Be Vietnam Pro',system-ui,-apple-system,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;
  font-size:16px;
  line-height:1.66;
  color:var(--text);
  background-color:var(--bg);
  background-image:
    radial-gradient(1100px 620px at 10% -10%, rgba(34,211,238,.16), transparent 60%),
    radial-gradient(900px 560px at 90% 2%, rgba(46,125,247,.18), transparent 62%),
    linear-gradient(180deg,#020A14 0%,#04121F 42%,#020A14 100%);
  background-attachment:fixed;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
button,input{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0;line-height:1.28;font-weight:700;letter-spacing:-.01em}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 20px}
.section{position:relative;padding:74px 0;border-top:1px solid rgba(56,189,248,.09)}
.section--plain{border-top:0}
.section--deep{background:linear-gradient(180deg,rgba(2,10,20,.35),rgba(4,18,31,.72) 40%,rgba(2,10,20,.4))}
.section--band{background:radial-gradient(700px 320px at 15% 0%, rgba(14,165,165,.16), transparent 65%),linear-gradient(180deg,rgba(4,18,31,.9),rgba(2,10,20,.55))}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:.72rem;font-weight:600;letter-spacing:.14em;text-transform:uppercase;
  color:var(--cyan);background:rgba(34,211,238,.09);
  border:1px solid rgba(34,211,238,.28);border-radius:999px;
  padding:6px 13px;margin-bottom:16px;
}
.section-head{max-width:780px;margin-bottom:34px}
.section-head h2{font-size:clamp(1.4rem,2.4vw,2rem)}
.section-head p{color:var(--muted);margin-top:10px;font-size:1rem}
.section-head--split{max-width:none;display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);gap:28px;align-items:end}
.lead{color:var(--muted)}
.muted{color:var(--muted)}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  padding:12px 22px;border-radius:999px;border:1px solid transparent;
  font-weight:600;font-size:.94rem;cursor:pointer;
  transition:transform .22s ease,box-shadow .22s ease,background .22s ease,color .22s ease,border-color .22s ease;
  white-space:nowrap;
}
.btn:focus-visible{outline:2px solid var(--leaf);outline-offset:3px}
.btn--primary{background:linear-gradient(120deg,var(--cyan),var(--blue));color:#03121F;font-weight:700;box-shadow:var(--glow)}
.btn--primary:hover{transform:translateY(-2px);box-shadow:var(--glow-strong)}
.btn--primary:active{transform:translateY(0) scale(.98)}
.btn--ghost{background:rgba(34,211,238,.06);border-color:rgba(34,211,238,.4);color:#CFF6FF}
.btn--ghost:hover{background:rgba(34,211,238,.15);border-color:var(--cyan);transform:translateY(-2px)}
.btn--outline{background:transparent;border-color:rgba(148,166,189,.35);color:var(--text)}
.btn--outline:hover{border-color:var(--cyan);color:var(--cyan);transform:translateY(-2px)}
.btn--sm{padding:9px 16px;font-size:.85rem}
.tag{
  display:inline-block;font-size:.7rem;font-weight:600;letter-spacing:.1em;text-transform:uppercase;
  padding:4px 10px;border-radius:999px;color:var(--leaf);
  background:rgba(94,234,212,.1);border:1px solid rgba(94,234,212,.28);
}
.tag--gold{color:var(--gold);background:rgba(245,196,81,.1);border-color:rgba(245,196,81,.3)}
.tag--danger{color:var(--danger);background:rgba(251,113,133,.1);border-color:rgba(251,113,133,.3)}
/* HEADER */
.site-header{position:sticky;top:0;z-index:60;background:rgba(2,10,20,.86);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border-bottom:1px solid rgba(56,189,248,.14)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:13px 0}
.brand{display:flex;align-items:center;gap:12px;min-width:0}
.brand__mark{flex:0 0 auto;width:44px;height:44px;border-radius:14px;display:grid;place-items:center;background:linear-gradient(140deg,var(--teal),var(--blue));color:#03121F;font-size:1.05rem;box-shadow:var(--glow)}
.brand__text{min-width:0}
.brand__text strong{display:block;font-size:.97rem;font-weight:700;line-height:1.25;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.brand__text small{display:block;font-size:.68rem;letter-spacing:.13em;text-transform:uppercase;color:var(--muted-2)}
.header-actions{display:flex;align-items:center;gap:9px;flex:0 0 auto}
.main-nav{border-top:1px solid rgba(56,189,248,.1);background:rgba(3,12,22,.55)}
.nav-scroll{display:flex;gap:6px;overflow-x:auto;padding:8px 20px;scrollbar-width:none}
.nav-scroll::-webkit-scrollbar{display:none}
.nav-link{padding:9px 15px;border-radius:11px;font-size:.88rem;font-weight:500;color:var(--muted);white-space:nowrap;border:1px solid transparent;transition:.24s ease}
.nav-link:hover{color:var(--text);background:rgba(34,211,238,.08);border-color:rgba(34,211,238,.24)}
.nav-link.is-active{color:#03121F;font-weight:700;background:linear-gradient(120deg,var(--cyan),var(--leaf));box-shadow:0 0 16px rgba(34,211,238,.35)}
/* ARTICLE HERO */
.article-hero{position:relative;overflow:hidden;border-bottom:1px solid rgba(56,189,248,.12)}
.article-hero__bg{position:absolute;inset:0;background:url('/assets/images/d7c30003c9aa946d.jpg') center/cover no-repeat;opacity:.26}
.article-hero__veil{position:absolute;inset:0;background:linear-gradient(180deg,rgba(2,10,20,.7) 0%,rgba(2,10,20,.88) 55%,var(--bg) 100%)}
.article-hero__inner{position:relative;z-index:2;padding:44px 0 52px}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:.8rem;color:var(--muted-2);margin-bottom:20px}
.breadcrumb a{color:var(--muted)}
.breadcrumb a:hover{color:var(--cyan)}
.breadcrumb i{font-size:.6rem;opacity:.7}
.article-hero h1{font-size:clamp(1.6rem,3.4vw,2.6rem);max-width:920px}
.article-hero__sub{margin-top:16px;max-width:760px;color:#C6DCEE;font-size:1.02rem}
.article-meta{display:flex;flex-wrap:wrap;gap:10px 22px;margin-top:22px;font-size:.83rem;color:var(--muted)}
.article-meta span{display:inline-flex;align-items:center;gap:8px}
.article-meta i{color:var(--cyan)}
.article-hero__figure{margin-top:30px;border-radius:var(--radius-lg);overflow:hidden;border:1px solid var(--stroke);box-shadow:var(--shadow);position:relative}
.article-hero__figure img{width:100%;aspect-ratio:16/7;object-fit:cover}
.article-hero__figure figcaption{position:absolute;left:0;right:0;bottom:0;padding:14px 18px;font-size:.82rem;color:#D6E8F7;background:linear-gradient(180deg,transparent,rgba(2,10,20,.92))}
/* PULL QUOTE */
.pullquote{position:relative;padding:32px 30px 32px 38px;border-radius:var(--radius-lg);border:1px solid var(--stroke);background:linear-gradient(135deg,rgba(34,211,238,.09),rgba(46,125,247,.06));box-shadow:var(--shadow-soft)}
.pullquote::before{content:"“";position:absolute;left:14px;top:6px;font-size:3.4rem;line-height:1;color:rgba(34,211,238,.35);font-family:Georgia,serif}
.pullquote p{font-size:1.08rem;color:#DCEBF8;font-weight:500}
.pullquote cite{display:block;margin-top:14px;font-style:normal;font-size:.82rem;letter-spacing:.08em;text-transform:uppercase;color:var(--cyan)}
/* ARTICLE BODY */
.article-shell{max-width:940px;margin:0 auto}
.article-body{font-size:1.02rem;line-height:1.75;color:#D8E9F7}
.article-body h2{font-size:clamp(1.24rem,2.1vw,1.6rem);margin:42px 0 16px;padding-left:14px;border-left:4px solid var(--cyan);color:#FFFFFF}
.article-body h3{font-size:1.1rem;margin:30px 0 12px;color:#EAF6FF}
.article-body p{margin:0 0 18px}
.article-body ul,.article-body ol{margin:0 0 22px;padding-left:22px}
.article-body ul li{list-style:none;position:relative;padding-left:20px;margin-bottom:10px}
.article-body ul li::before{content:"";position:absolute;left:0;top:10px;width:7px;height:7px;border-radius:50%;background:linear-gradient(120deg,var(--cyan),var(--leaf))}
.article-body ol{list-style:decimal}
.article-body ol li{margin-bottom:10px}
.article-body strong{color:#FFFFFF}
.article-body a{color:var(--cyan);border-bottom:1px dashed rgba(34,211,238,.5)}
.article-body a:hover{color:var(--leaf)}
.article-body blockquote{margin:26px 0;padding:20px 24px;border-radius:var(--radius);background:rgba(6,20,34,.7);border:1px solid var(--stroke);color:#CFE6F7}
.article-body img{border-radius:var(--radius);border:1px solid var(--stroke);margin:24px 0;width:100%}
.article-body figure{margin:26px 0}
.article-body figcaption{font-size:.82rem;color:var(--muted-2);margin-top:8px;text-align:left}
.article-body table{width:100%;border-collapse:collapse;margin:24px 0;font-size:.92rem}
.article-body th,.article-body td{padding:12px 14px;text-align:left;border-bottom:1px solid rgba(56,189,248,.15)}
.article-body th{background:rgba(34,211,238,.08);color:#DCF2FF;font-weight:600}
.article-body hr{border:0;border-top:1px solid rgba(56,189,248,.16);margin:34px 0}
.article-empty{padding:44px 28px;border-radius:var(--radius-lg);border:1px solid var(--stroke);background:var(--panel);text-align:center}
.article-empty h2{font-size:1.3rem;margin-bottom:12px}
.article-empty p{color:var(--muted);margin-bottom:22px}
/* STATS */
.stat-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px}
.stat-card{padding:22px;border-radius:var(--radius);border:1px solid var(--stroke);background:var(--panel);backdrop-filter:blur(10px);transition:transform .25s ease,border-color .25s ease}
.stat-card:hover{transform:translateY(-4px);border-color:var(--stroke-strong)}
.stat-card__value{font-size:1.7rem;font-weight:800;background:linear-gradient(120deg,var(--cyan),var(--leaf));-webkit-background-clip:text;background-clip:text;color:transparent}
.stat-card__label{margin-top:8px;font-size:.82rem;letter-spacing:.06em;text-transform:uppercase;color:var(--muted-2)}
.stat-card p{margin-top:10px;font-size:.9rem;color:var(--muted)}
/* TECH CARDS */
.tech-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.tech-card{display:flex;flex-direction:column;padding:26px 24px;border-radius:var(--radius);border:1px solid var(--stroke);background:linear-gradient(160deg,rgba(9,28,46,.82),rgba(4,18,31,.6));transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease}
.tech-card:hover{transform:translateY(-5px);border-color:var(--stroke-strong);box-shadow:var(--glow)}
.tech-card__icon{width:46px;height:46px;border-radius:14px;display:grid;place-items:center;background:rgba(34,211,238,.12);color:var(--cyan);font-size:1.05rem;margin-bottom:16px}
.tech-card h3{font-size:1.08rem;margin-bottom:10px}
.tech-card p{color:var(--muted);font-size:.94rem}
.tech-card__link{margin-top:18px;font-size:.86rem;font-weight:600;color:var(--cyan);display:inline-flex;align-items:center;gap:8px}
.tech-card__link:hover{gap:12px;color:var(--leaf)}
/* COMPARE */
.compare{display:grid;gap:12px}
.compare-row{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,1fr) minmax(0,1fr);gap:14px;align-items:center;padding:16px 20px;border-radius:var(--radius-sm);border:1px solid var(--stroke);background:rgba(6,20,34,.55);transition:background .22s ease,border-color .22s ease}
.compare-row:hover{background:rgba(34,211,238,.07);border-color:var(--stroke-strong)}
.compare-row--head{background:rgba(34,211,238,.1);font-size:.78rem;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);font-weight:600}
.compare-row strong{font-size:.98rem}
.compare-row span{font-size:.9rem;color:var(--muted)}
/* MISTAKES */
.mistake-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.mistake-item{display:flex;gap:14px;padding:20px;border-radius:var(--radius);border:1px solid rgba(251,113,133,.2);background:rgba(43,10,20,.32)}
.mistake-item i{color:var(--danger);font-size:1rem;margin-top:4px}
.mistake-item h3{font-size:1rem;margin-bottom:8px}
.mistake-item p{font-size:.92rem;color:var(--muted)}
/* FAQ */
.faq{max-width:900px;display:grid;gap:12px}
.faq-item{border-radius:var(--radius);border:1px solid var(--stroke);background:var(--panel);overflow:hidden}
.faq-item summary{list-style:none;cursor:pointer;padding:18px 22px;font-weight:600;font-size:1rem;display:flex;align-items:center;justify-content:space-between;gap:16px;transition:background .22s ease}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{background:rgba(34,211,238,.07)}
.faq-item summary i{color:var(--cyan);transition:transform .25s ease;flex:0 0 auto}
.faq-item[open] summary i{transform:rotate(45deg)}
.faq-item__body{padding:0 22px 20px;color:var(--muted);font-size:.95rem}
/* CTA */
.cta-band{position:relative;overflow:hidden;border-radius:var(--radius-lg);border:1px solid var(--stroke-strong);padding:44px 36px;background:linear-gradient(130deg,rgba(14,165,165,.24),rgba(46,125,247,.22));box-shadow:var(--shadow);display:grid;grid-template-columns:minmax(0,1.35fr) minmax(0,1fr);gap:28px;align-items:center}
.cta-band h2{font-size:clamp(1.35rem,2.5vw,2rem)}
.cta-band p{color:#D3E9F8;margin-top:12px}
.cta-band__actions{display:flex;flex-wrap:wrap;gap:12px;justify-content:flex-end}
.cta-note{margin-top:14px;font-size:.8rem;color:var(--muted-2)}
/* FOOTER */
.site-footer{margin-top:20px;border-top:1px solid rgba(56,189,248,.14);background:linear-gradient(180deg,rgba(4,18,31,.85),rgba(1,7,16,.98))}
.footer-grid{display:grid;grid-template-columns:minmax(0,1.4fr) repeat(3,minmax(0,1fr));gap:32px;padding:56px 0 34px}
.footer-brand p{color:var(--muted);font-size:.92rem;margin-top:16px;max-width:420px}
.footer-col h3{font-size:.82rem;letter-spacing:.12em;text-transform:uppercase;color:var(--muted-2);margin-bottom:16px}
.footer-col li{margin-bottom:10px}
.footer-col a{color:var(--muted);font-size:.92rem;transition:color .2s ease}
.footer-col a:hover{color:var(--cyan)}
.footer-bottom{display:flex;flex-wrap:wrap;gap:16px;align-items:center;justify-content:space-between;padding:20px 0 30px;border-top:1px solid rgba(56,189,248,.1)}
.footer-bottom p{font-size:.82rem;color:var(--muted-2)}
.footer-badges{display:flex;flex-wrap:wrap;gap:10px}
.footer-badges span{font-size:.72rem;letter-spacing:.06em;text-transform:uppercase;color:var(--leaf);border:1px solid rgba(94,234,212,.25);background:rgba(94,234,212,.07);border-radius:999px;padding:5px 12px}
/* FAB */
.fab{
  position:fixed;left:16px;bottom:96px;z-index:50;
  display:inline-flex;align-items:center;gap:10px;min-height:56px;
  padding:12px 20px 12px 14px;border-radius:999px;
  background:rgba(7,7,13,.82);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  border:1px solid transparent;
  background-image:linear-gradient(rgba(7,10,20,.92),rgba(7,10,20,.92)),linear-gradient(120deg,var(--cyan),var(--leaf));
  background-origin:border-box;background-clip:padding-box,border-box;
  box-shadow:0 0 20px rgba(6,182,212,.45);
  opacity:.78;transition:opacity .25s ease,box-shadow .25s ease,transform .2s ease;
}
.fab:hover{opacity:1;box-shadow:0 0 32px rgba(6,182,212,.62)}
.fab:active{transform:scale(.96)}
.fab__icon{width:34px;height:34px;border-radius:50%;display:grid;place-items:center;background:linear-gradient(130deg,var(--cyan),var(--blue));color:#03121F;font-size:.95rem}
.fab__label{font-size:.86rem;font-weight:600;color:#DCF3FF;letter-spacing:.04em}
.fab__dot{position:absolute;top:8px;right:10px;width:9px;height:9px;border-radius:50%;background:var(--danger);box-shadow:0 0 10px rgba(251,113,133,.9);animation:pulse 1.6s infinite}
@keyframes pulse{0%,100%{opacity:1;transform:scale(1)}50%{opacity:.45;transform:scale(.8)}}
@media (max-width:1024px){
  .hero-grid,.section-head--split{grid-template-columns:1fr}
  .stat-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .tech-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .cta-band{grid-template-columns:1fr}
  .cta-band__actions{justify-content:flex-start}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:768px){
  .section{padding:56px 0}
  .brand__text small{display:none}
  .brand__text strong{white-space:normal;font-size:.9rem}
  .btn{padding:10px 16px;font-size:.86rem}
  .compare-row{grid-template-columns:1fr;gap:6px}
  .compare-row--head{display:none}
  .mistake-list{grid-template-columns:1fr}
  .article-hero__inner{padding:34px 0 40px}
  .article-hero__figure img{aspect-ratio:16/10}
}
@media (max-width:520px){
  .container{padding:0 14px}
  .header-actions .btn--ghost{display:none}
  .stat-grid,.tech-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .pullquote{padding:26px 20px 26px 30px}
  .cta-band{padding:30px 22px}
  .fab{padding:10px 16px 10px 12px}
  .fab__label{display:none}
}

/* roulang page: category1 */
:root{
  --bg:#020A14;
  --bg-soft:#04121F;
  --bg-deep:#010710;
  --panel:rgba(9,28,46,.74);
  --panel-solid:#071B2C;
  --stroke:rgba(56,189,248,.18);
  --stroke-strong:rgba(34,211,238,.5);
  --text:#EAF6FF;
  --muted:#8FA6BD;
  --muted-2:#6C8299;
  --cyan:#22D3EE;
  --blue:#2E7DF7;
  --teal:#0EA5A5;
  --leaf:#5EEAD4;
  --gold:#F5C451;
  --danger:#FB7185;
  --radius-lg:24px;
  --radius:16px;
  --radius-sm:10px;
  --shadow:0 18px 45px rgba(0,0,0,.45);
  --shadow-soft:0 10px 30px rgba(0,0,0,.32);
  --glow:0 0 22px rgba(34,211,238,.35);
  --glow-strong:0 0 34px rgba(34,211,238,.5);
  --maxw:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:'Be Vietnam Pro',system-ui,-apple-system,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;
  font-size:16px;
  line-height:1.66;
  color:var(--text);
  background-color:var(--bg);
  background-image:
    radial-gradient(1100px 620px at 10% -10%, rgba(34,211,238,.16), transparent 60%),
    radial-gradient(900px 560px at 90% 2%, rgba(46,125,247,.18), transparent 62%),
    linear-gradient(180deg,#020A14 0%,#04121F 42%,#020A14 100%);
  background-attachment:fixed;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
button,input{font:inherit;color:inherit}
ul{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.26;letter-spacing:-.01em}
h1{font-size:clamp(1.62rem,3.5vw,2.55rem)}
h2{font-size:clamp(1.34rem,2.4vw,1.86rem)}
h3{font-size:1.05rem}
p{margin:0 0 14px}
p:last-child{margin-bottom:0}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:6px}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 20px}
.section{position:relative;padding:74px 0;border-top:1px solid rgba(56,189,248,.09)}
.section--plain{border-top:0}
.section--deep{background:linear-gradient(180deg,rgba(2,10,20,.35),rgba(4,18,31,.72) 40%,rgba(2,10,20,.4))}
.section--band{background:
  radial-gradient(700px 320px at 15% 0%, rgba(14,165,165,.16), transparent 65%),
  linear-gradient(180deg,rgba(4,18,31,.9),rgba(2,10,20,.55))}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:.72rem;font-weight:600;letter-spacing:.14em;text-transform:uppercase;
  color:var(--cyan);background:rgba(34,211,238,.09);
  border:1px solid rgba(34,211,238,.28);border-radius:999px;
  padding:6px 13px;margin-bottom:16px;
}
.section-head{max-width:800px;margin-bottom:34px}
.section-head p{color:var(--muted);margin:10px 0 0;font-size:1rem}
.section-head--split{max-width:none;display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,.9fr);gap:28px;align-items:end}
.lead{color:var(--muted)}
.muted{color:var(--muted)}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  padding:12px 22px;border-radius:999px;border:1px solid transparent;
  font-weight:600;font-size:.94rem;cursor:pointer;
  transition:transform .22s ease,box-shadow .22s ease,background .22s ease,color .22s ease,border-color .22s ease;
  white-space:nowrap;
}
.btn--primary{background:linear-gradient(120deg,var(--cyan),var(--blue));color:#03121F;font-weight:700;box-shadow:var(--glow)}
.btn--primary:hover{transform:translateY(-2px);box-shadow:var(--glow-strong)}
.btn--primary:active{transform:translateY(0) scale(.98)}
.btn--ghost{background:rgba(34,211,238,.06);border-color:rgba(34,211,238,.4);color:#CFF6FF}
.btn--ghost:hover{background:rgba(34,211,238,.15);border-color:var(--cyan);transform:translateY(-2px)}
.btn--outline{background:transparent;border-color:rgba(148,166,189,.35);color:var(--text)}
.btn--outline:hover{border-color:var(--cyan);color:var(--cyan);transform:translateY(-2px)}
.btn--sm{padding:9px 16px;font-size:.85rem}
.tag{
  display:inline-block;font-size:.68rem;font-weight:600;letter-spacing:.1em;text-transform:uppercase;
  padding:4px 10px;border-radius:999px;color:var(--leaf);
  background:rgba(94,234,212,.1);border:1px solid rgba(94,234,212,.28);
}
.tag--gold{color:var(--gold);background:rgba(245,196,81,.1);border-color:rgba(245,196,81,.3)}
.tag--danger{color:var(--danger);background:rgba(251,113,133,.1);border-color:rgba(251,113,133,.3)}
.tag--blue{color:#9FD0FF;background:rgba(46,125,247,.12);border-color:rgba(46,125,247,.34)}
/* HEADER */
.site-header{position:sticky;top:0;z-index:60;background:rgba(2,10,20,.86);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border-bottom:1px solid rgba(56,189,248,.14)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:13px 0}
.brand{display:flex;align-items:center;gap:12px;min-width:0}
.brand__mark{
  flex:0 0 auto;width:44px;height:44px;border-radius:14px;display:grid;place-items:center;
  background:linear-gradient(140deg,var(--teal),var(--blue));
  color:#03121F;font-size:1.05rem;box-shadow:var(--glow);
}
.brand__text{min-width:0}
.brand__text strong{display:block;font-size:.97rem;font-weight:700;line-height:1.25;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.brand__text small{display:block;font-size:.68rem;letter-spacing:.13em;text-transform:uppercase;color:var(--muted-2)}
.header-actions{display:flex;align-items:center;gap:9px;flex:0 0 auto}
.main-nav{border-top:1px solid rgba(56,189,248,.1);background:rgba(3,12,22,.55)}
.nav-scroll{display:flex;gap:6px;overflow-x:auto;padding:8px 20px;scrollbar-width:none}
.nav-scroll::-webkit-scrollbar{display:none}
.nav-link{
  padding:9px 15px;border-radius:11px;font-size:.88rem;font-weight:500;color:var(--muted);
  white-space:nowrap;border:1px solid transparent;transition:.24s ease;
}
.nav-link:hover{color:var(--text);background:rgba(34,211,238,.08);border-color:rgba(34,211,238,.24)}
.nav-link.is-active{color:#03121F;font-weight:700;background:linear-gradient(120deg,var(--cyan),var(--leaf));box-shadow:0 0 16px rgba(34,211,238,.35)}
/* HERO */
.hero{position:relative;padding:56px 0 68px;overflow:hidden}
.hero::before{
  content:"";position:absolute;inset:0;
  background:url('/assets/images/d7c30003c9aa946d.jpg') center/cover no-repeat;
  opacity:.28;
}
.hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(2,10,20,.68) 0%,rgba(2,10,20,.92) 62%,var(--bg) 100%);
}
.hero .container{position:relative;z-index:2}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.02fr) minmax(0,.98fr);gap:34px;align-items:center}
.hero-copy h1{margin-bottom:16px}
.hero-copy .lead{font-size:1.02rem;max-width:640px}
.hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}
.hero-stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;margin-top:28px}
.hero-stats div{padding:12px 14px;border-radius:var(--radius-sm);border:1px solid var(--stroke);background:rgba(6,20,34,.62);backdrop-filter:blur(10px)}
.hero-stats b{display:block;font-size:1.22rem;color:var(--cyan);line-height:1.2}
.hero-stats span{font-size:.7rem;color:var(--muted-2);text-transform:uppercase;letter-spacing:.07em}
/* COMPARE */
.compare{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.compare__col{padding:20px;border-radius:var(--radius);border:1px solid var(--stroke);background:var(--panel);backdrop-filter:blur(12px);box-shadow:var(--shadow-soft)}
.compare__col--before{border-color:rgba(251,113,133,.3);background:linear-gradient(180deg,rgba(251,113,133,.09),rgba(9,28,46,.74))}
.compare__col--after{border-color:rgba(94,234,212,.34);background:linear-gradient(180deg,rgba(34,211,238,.11),rgba(9,28,46,.74))}
.compare__col h2{font-size:1rem;margin:12px 0 12px}
.compare__col li{position:relative;padding-left:20px;font-size:.9rem;color:var(--muted);margin-bottom:9px;line-height:1.56}
.compare__col li:last-child{margin-bottom:0}
.compare__col li::before{content:"";position:absolute;left:0;top:8px;width:7px;height:7px;border-radius:50%}
.compare__col--before li::before{background:var(--danger)}
.compare__col--after li::before{background:var(--leaf)}
/* GRIDS */
.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.grid-4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px}
.grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}
/* CARD */
.card{
  position:relative;padding:24px;border-radius:var(--radius);border:1px solid var(--stroke);
  background:linear-gradient(160deg,rgba(9,28,46,.86),rgba(3,13,24,.8));
  backdrop-filter:blur(12px);transition:transform .28s ease,border-color .28s ease,box-shadow .28s ease;
}
.card:hover{transform:translateY(-4px);border-color:var(--stroke-strong);box-shadow:var(--glow)}
.card__icon{
  width:46px;height:46px;border-radius:13px;display:grid;place-items:center;margin-bottom:16px;
  background:linear-gradient(140deg,rgba(34,211,238,.22),rgba(46,125,247,.28));
  border:1px solid rgba(34,211,238,.32);color:var(--cyan);font-size:1.05rem;
}
.card h3{margin-bottom:10px}
.card p{color:var(--muted);font-size:.92rem}
.card__num{
  position:absolute;top:18px;right:20px;font-size:1.6rem;font-weight:800;
  color:rgba(34,211,238,.22);line-height:1;
}
/* SCENE CARD */
.scene{overflow:hidden;border-radius:var(--radius);border:1px solid var(--stroke);background:rgba(7,27,44,.8);backdrop-filter:blur(12px);transition:transform .28s ease,border-color .28s ease,box-shadow .28s ease}
.scene:hover{transform:translateY(-4px);border-color:var(--stroke-strong);box-shadow:var(--glow)}
.scene__img{position:relative;aspect-ratio:16/10;overflow:hidden}
.scene__img img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.scene:hover .scene__img img{transform:scale(1.06)}
.scene__img::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(2,10,20,.05),rgba(3,13,24,.9))}
.scene__body{padding:18px;position:relative;z-index:2}
.scene__body h3{font-size:.98rem;margin-bottom:8px}
.scene__body p{font-size:.86rem;color:var(--muted);margin:0}
.scene__badge{position:absolute;top:12px;left:12px;z-index:3}
/* STEPS */
.steps{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px;counter-reset:step}
.step{padding:24px 22px;border-radius:var(--radius);border:1px solid var(--stroke);background:rgba(6,20,34,.68);backdrop-filter:blur(10px);position:relative;transition:.28s ease}
.step:hover{border-color:var(--stroke-strong);transform:translateY(-4px);box-shadow:var(--glow)}
.step::before{
  counter-increment:step;content:"0" counter(step);
  display:inline-block;font-size:1.5rem;font-weight:800;color:var(--cyan);
  letter-spacing:.02em;margin-bottom:12px;
}
.step h3{margin-bottom:8px;font-size:1rem}
.step p{font-size:.89rem;color:var(--muted);margin:0}
/* TABLE */
.table-wrap{overflow-x:auto;border-radius:var(--radius);border:1px solid var(--stroke);background:rgba(5,18,31,.78);backdrop-filter:blur(10px)}
table{width:100%;border-collapse:collapse;min-width:660px}
thead th{
  text-align:left;font-size:.74rem;letter-spacing:.12em;text-transform:uppercase;
  color:var(--cyan);padding:16px 18px;background:rgba(34,211,238,.07);
  border-bottom:1px solid rgba(56,189,248,.2);font-weight:600;white-space:nowrap;
}
tbody td{padding:15px 18px;font-size:.9rem;color:var(--muted);border-bottom:1px solid rgba(56,189,248,.09)}
tbody tr:last-child td{border-bottom:0}
tbody tr:hover td{background:rgba(34,211,238,.045);color:var(--text)}
tbody td:first-child{color:var(--text);font-weight:600}
/* FIX LIST */
.fix{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.fix__panel{border-radius:var(--radius);border:1px solid var(--stroke);background:rgba(6,20,34,.7);backdrop-filter:blur(10px);padding:22px}
.fix__panel--bad{border-color:rgba(251,113,133,.28)}
.fix__panel--good{border-color:rgba(94,234,212,.28)}
.fix__panel h3{display:flex;align-items:center;gap:10px;margin-bottom:16px;font-size:1rem}
.fix__panel--bad h3 i{color:var(--danger)}
.fix__panel--good h3 i{color:var(--leaf)}
.fix__row{display:flex;gap:12px;padding:12px 0;border-bottom:1px dashed rgba(56,189,248,.14)}
.fix__row:last-child{border-bottom:0;padding-bottom:0}
.fix__row span{flex:0 0 22px;color:var(--muted-2);font-size:.82rem;font-weight:700;padding-top:2px}
.fix__row p{margin:0;font-size:.89rem;color:var(--muted)}
.fix__row p b{color:var(--text);font-weight:600}
/* QUOTES */
.quote{padding:24px;border-radius:var(--radius);border:1px solid var(--stroke);background:rgba(6,20,34,.66);backdrop-filter:blur(10px);transition:.28s ease}
.quote:hover{border-color:var(--stroke-strong);transform:translateY(-4px)}
.quote__stars{color:var(--gold);font-size:.8rem;margin-bottom:12px;letter-spacing:2px}
.quote p{font-size:.92rem;color:#C9DCEB;font-style:italic}
.quote__who{display:flex;align-items:center;gap:12px;margin-top:18px;padding-top:16px;border-top:1px solid rgba(56,189,248,.13)}
.quote__av{width:38px;height:38px;border-radius:50%;display:grid;place-items:center;font-weight:700;font-size:.85rem;color:#03121F;background:linear-gradient(140deg,var(--cyan),var(--leaf))}
.quote__who strong{display:block;font-size:.88rem}
.quote__who small{color:var(--muted-2);font-size:.76rem}
/* CATEGORY MATRIX */
.cat-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.cat-card{
  display:flex;flex-direction:column;gap:10px;padding:26px;border-radius:var(--radius);
  border:1px solid var(--stroke);background:linear-gradient(160deg,rgba(9,28,46,.92),rgba(3,13,24,.86));
  backdrop-filter:blur(12px);transition:.28s ease;
}
.cat-card:hover{transform:translateY(-5px);border-color:var(--stroke-strong);box-shadow:var(--glow)}
.cat-card i{color:var(--cyan);font-size:1.2rem}
.cat-card h3{font-size:1.02rem}
.cat-card p{font-size:.88rem;color:var(--muted);margin:0}
.cat-card .more{font-size:.84rem;font-weight:600;color:var(--cyan);margin-top:6px;display:inline-flex;align-items:center;gap:7px}
/* CTA */
.cta-band{
  position:relative;overflow:hidden;border-radius:var(--radius-lg);
  border:1px solid rgba(34,211,238,.32);
  background:linear-gradient(120deg,rgba(34,211,238,.14),rgba(46,125,247,.16) 55%,rgba(14,165,165,.14));
  padding:40px;box-shadow:var(--shadow);
}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background:url('/assets/images/8ad579fdcbbbdd00.jpg') center/cover no-repeat;opacity:.14;
}
.cta-band > *{position:relative;z-index:2}
.cta-band__grid{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(0,.75fr);gap:28px;align-items:center}
.cta-band h2{margin-bottom:12px}
.cta-band p{color:#C6DBEA}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px}
.trust-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
.trust-row span{
  display:inline-flex;align-items:center;gap:8px;font-size:.79rem;color:#BCD3E4;
  padding:7px 13px;border-radius:999px;border:1px solid rgba(56,189,248,.24);background:rgba(4,18,31,.6);
}
.trust-row i{color:var(--leaf)}
/* FAB */
.fab{
  position:fixed;left:16px;bottom:96px;z-index:50;width:56px;height:56px;border-radius:50%;
  display:grid;place-items:center;font-size:1.15rem;color:#03121F;
  background:linear-gradient(140deg,var(--cyan),var(--leaf));
  box-shadow:0 0 22px rgba(34,211,238,.5);opacity:.85;
  transition:transform .25s ease,opacity .25s ease,box-shadow .25s ease;
}
.fab:hover{opacity:1;transform:scale(1.1) rotate(6deg);box-shadow:0 0 34px rgba(34,211,238,.75)}
.fab:active{transform:scale(.94) translateY(3px)}
.fab__dot{position:absolute;top:2px;right:2px;width:12px;height:12px;border-radius:50%;background:#FB7185;box-shadow:0 0 0 2px #020A14}
/* FOOTER */
.site-footer{margin-top:0;border-top:1px solid rgba(56,189,248,.16);background:linear-gradient(180deg,rgba(3,12,22,.75),rgba(1,7,16,.96));padding:56px 0 26px}
.footer-grid{display:grid;grid-template-columns:minmax(0,1.4fr) repeat(3,minmax(0,1fr));gap:32px}
.footer-brand p{color:var(--muted);font-size:.88rem;margin-top:16px;max-width:420px}
.footer-col h3{font-size:.78rem;letter-spacing:.14em;text-transform:uppercase;color:var(--cyan);margin-bottom:16px}
.footer-col li{margin-bottom:10px}
.footer-col a{font-size:.88rem;color:var(--muted);transition:.2s ease}
.footer-col a:hover{color:var(--cyan);padding-left:4px}
.footer-bottom{
  margin-top:40px;padding-top:22px;border-top:1px solid rgba(56,189,248,.13);
  display:flex;flex-wrap:wrap;gap:16px;align-items:center;justify-content:space-between;
}
.footer-bottom p{font-size:.8rem;color:var(--muted-2);margin:0}
.footer-badges{display:flex;flex-wrap:wrap;gap:9px}
.footer-badges span{font-size:.72rem;color:#A9C1D4;padding:6px 12px;border-radius:999px;border:1px solid rgba(56,189,248,.2);background:rgba(4,18,31,.6)}
/* RESPONSIVE */
@media (max-width:1024px){
  .hero-grid{grid-template-columns:1fr;gap:30px}
  .grid-4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .steps{grid-template-columns:repeat(2,minmax(0,1fr))}
  .cat-grid{grid-template-columns:repeat(3,minmax(0,1fr))}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px}
  .cta-band__grid{grid-template-columns:1fr}
}
@media (max-width:820px){
  .section{padding:58px 0}
  .section-head--split{grid-template-columns:1fr;gap:14px;align-items:start}
  .grid-3{grid-template-columns:1fr}
  .grid-2{grid-template-columns:1fr}
  .fix{grid-template-columns:1fr}
  .cat-grid{grid-template-columns:1fr}
  .hero-stats{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:640px){
  .container{padding:0 16px}
  .hero{padding:42px 0 52px}
  .section{padding:48px 0}
  .header-inner{gap:10px}
  .brand__mark{width:40px;height:40px;border-radius:12px;font-size:.95rem}
  .brand__text strong{font-size:.86rem;white-space:normal}
  .brand__text small{display:none}
  .header-actions .btn{padding:9px 14px;font-size:.82rem}
  .grid-4{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}
  .compare{grid-template-columns:1fr}
  .cta-band{padding:26px 20px}
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  h1{font-size:1.5rem}
  .fab{width:52px;height:52px;bottom:88px}
}
@media (max-width:420px){
  .hero-stats{grid-template-columns:1fr}
  .btn{width:100%}
  .hero-cta .btn,.cta-actions .btn{width:100%}
}

/* roulang page: category2 */
:root{
  --bg:#020A14;
  --bg-soft:#04121F;
  --bg-deep:#010710;
  --panel:rgba(9,28,46,.74);
  --panel-solid:#071B2C;
  --stroke:rgba(56,189,248,.18);
  --stroke-strong:rgba(34,211,238,.5);
  --text:#EAF6FF;
  --muted:#8FA6BD;
  --muted-2:#6C8299;
  --cyan:#22D3EE;
  --blue:#2E7DF7;
  --teal:#0EA5A5;
  --leaf:#5EEAD4;
  --gold:#F5C451;
  --danger:#FB7185;
  --radius-lg:24px;
  --radius:16px;
  --radius-sm:10px;
  --shadow:0 18px 45px rgba(0,0,0,.45);
  --shadow-soft:0 10px 30px rgba(0,0,0,.32);
  --glow:0 0 22px rgba(34,211,238,.35);
  --glow-strong:0 0 34px rgba(34,211,238,.5);
  --maxw:1200px;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  padding-bottom:88px;
  font-family:'Be Vietnam Pro',system-ui,-apple-system,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;
  font-size:16px;
  line-height:1.66;
  color:var(--text);
  background-color:var(--bg);
  background-image:
    radial-gradient(1100px 620px at 10% -10%, rgba(34,211,238,.16), transparent 60%),
    radial-gradient(900px 560px at 90% 2%, rgba(46,125,247,.18), transparent 62%),
    linear-gradient(180deg,#020A14 0%,#04121F 42%,#020A14 100%);
  background-attachment:fixed;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
button,input{font:inherit;color:inherit}
::selection{background:rgba(34,211,238,.3);color:#fff}
h1,h2,h3,h4{margin:0 0 12px;line-height:1.24;font-weight:700;letter-spacing:-.01em}
h1{font-size:clamp(1.75rem,3.4vw,2.85rem);font-weight:800}
h2{font-size:clamp(1.4rem,2.5vw,2rem)}
h3{font-size:1.06rem}
p{margin:0 0 12px}
p:last-child{margin-bottom:0}
ul{margin:0;padding:0;list-style:none}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 20px}
.section{position:relative;padding:74px 0;border-top:1px solid rgba(56,189,248,.09)}
.section--plain{border-top:0}
.section--deep{background:linear-gradient(180deg,rgba(2,10,20,.35),rgba(4,18,31,.72) 40%,rgba(2,10,20,.4))}
.section--band{background:
  radial-gradient(700px 320px at 15% 0%, rgba(14,165,165,.16), transparent 65%),
  linear-gradient(180deg,rgba(4,18,31,.9),rgba(2,10,20,.55))}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:.72rem;font-weight:600;letter-spacing:.14em;text-transform:uppercase;
  color:var(--cyan);background:rgba(34,211,238,.09);
  border:1px solid rgba(34,211,238,.28);border-radius:999px;
  padding:6px 13px;margin-bottom:16px;
}
.section-head{max-width:800px;margin-bottom:34px}
.section-head p{color:var(--muted);margin:10px 0 0;font-size:1rem}
.section-head--split{max-width:none;display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,.9fr);gap:30px;align-items:end}
.lead{color:var(--muted)}
.muted{color:var(--muted)}
.gradient-text{background:linear-gradient(100deg,var(--cyan),var(--leaf));-webkit-background-clip:text;background-clip:text;color:transparent}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  padding:12px 22px;border-radius:999px;border:1px solid transparent;
  font-weight:600;font-size:.94rem;cursor:pointer;
  transition:transform .22s ease,box-shadow .22s ease,background .22s ease,color .22s ease,border-color .22s ease;
  white-space:nowrap;
}
.btn--primary{
  background:linear-gradient(120deg,var(--cyan),var(--blue));
  color:#03121F;font-weight:700;
  box-shadow:var(--glow);
}
.btn--primary:hover{transform:translateY(-2px);box-shadow:var(--glow-strong)}
.btn--primary:active{transform:translateY(0) scale(.98)}
.btn--ghost{
  background:rgba(34,211,238,.06);
  border-color:rgba(34,211,238,.4);
  color:#CFF6FF;
}
.btn--ghost:hover{background:rgba(34,211,238,.15);border-color:var(--cyan);transform:translateY(-2px)}
.btn--lg{padding:15px 30px;font-size:1rem}
.btn:focus-visible,.nav-link:focus-visible,a:focus-visible,summary:focus-visible{
  outline:2px solid var(--cyan);outline-offset:3px;border-radius:8px;
}
.tag{
  display:inline-block;font-size:.7rem;font-weight:600;letter-spacing:.1em;text-transform:uppercase;
  padding:4px 10px;border-radius:999px;color:var(--leaf);
  background:rgba(94,234,212,.1);border:1px solid rgba(94,234,212,.28);
}
.tag--gold{color:var(--gold);background:rgba(245,196,81,.1);border-color:rgba(245,196,81,.3)}
.tag--danger{color:var(--danger);background:rgba(251,113,133,.1);border-color:rgba(251,113,133,.3)}

/* HEADER / NAV */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(2,10,20,.86);
  backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid rgba(56,189,248,.14);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:13px 0}
.brand{display:flex;align-items:center;gap:12px;min-width:0}
.brand__mark{
  flex:0 0 auto;width:44px;height:44px;border-radius:14px;display:grid;place-items:center;
  background:linear-gradient(140deg,var(--teal),var(--blue));
  color:#03121F;font-size:1.05rem;box-shadow:var(--glow);
}
.brand__text{min-width:0}
.brand__text strong{display:block;font-size:.97rem;font-weight:700;line-height:1.25;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.brand__text small{display:block;font-size:.68rem;letter-spacing:.13em;text-transform:uppercase;color:var(--muted-2)}
.header-actions{display:flex;align-items:center;gap:9px;flex:0 0 auto}
.main-nav{border-top:1px solid rgba(56,189,248,.1);background:rgba(3,12,22,.55)}
.nav-scroll{display:flex;gap:6px;overflow-x:auto;padding:8px 20px;scrollbar-width:none}
.nav-scroll::-webkit-scrollbar{display:none}
.nav-link{
  padding:9px 15px;border-radius:11px;font-size:.88rem;font-weight:500;color:var(--muted);
  white-space:nowrap;border:1px solid transparent;transition:.24s ease;
}
.nav-link:hover{color:var(--text);background:rgba(34,211,238,.08);border-color:rgba(34,211,238,.24)}
.nav-link.is-active{
  color:#03121F;font-weight:700;
  background:linear-gradient(120deg,var(--cyan),var(--leaf));
  box-shadow:0 0 16px rgba(34,211,238,.35);
}

/* HERO */
.hero{position:relative;padding:56px 0 72px;overflow:hidden}
.hero__bg{
  position:absolute;inset:0;
  background:url('/assets/images/9fa9241f1cfcbee7.jpg') center/cover no-repeat;
  opacity:.28;filter:saturate(1.05);
}
.hero__veil{
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(2,10,20,.6) 0%,rgba(2,10,20,.88) 60%,var(--bg) 100%);
}
.hero .container{position:relative;z-index:2}
.hero-cut{
  position:relative;
  padding:54px 42px 58px;
  border:1px solid var(--stroke);
  border-radius:var(--radius-lg);
  background:linear-gradient(135deg,rgba(9,28,46,.92),rgba(4,18,31,.7) 58%,rgba(14,165,165,.16));
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  box-shadow:var(--shadow);
  clip-path:polygon(0 0,100% 4%,100% 100%,0 96%);
}
.hero-cut::before{
  content:"";position:absolute;left:0;top:0;width:5px;height:100%;
  background:linear-gradient(180deg,var(--cyan),rgba(46,125,247,0));
  opacity:.9;
}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.3fr) minmax(0,.7fr);gap:38px;align-items:center}
.hero h1{margin-bottom:16px}
.hero-sub{font-size:1.03rem;color:#C7DCEF;max-width:640px}
.hero-actions{margin-top:26px;display:flex;align-items:center;gap:16px;flex-wrap:wrap}
.hero-note{font-size:.82rem;color:var(--muted-2)}
.hero-chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:22px}
.hero-panel{display:grid;gap:12px}
.hero-stat{
  padding:16px 18px;border-radius:var(--radius);
  border:1px solid var(--stroke);background:rgba(6,20,34,.62);
  backdrop-filter:blur(10px);transition:.25s ease;
}
.hero-stat:hover{border-color:var(--stroke-strong);transform:translateY(-2px)}
.hero-stat i{color:var(--cyan);font-size:.95rem;margin-bottom:8px;display:block}
.hero-stat strong{display:block;font-size:1.32rem;font-weight:800;color:#fff;line-height:1.2}
.hero-stat span{font-size:.8rem;color:var(--muted)}

/* GRIDS & CARDS */
.grid{display:grid;gap:20px}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--4{grid-template-columns:repeat(4,minmax(0,1fr))}
.gcard{
  position:relative;
  padding:24px 22px;
  border:1px solid var(--stroke);
  border-radius:var(--radius);
  background:var(--panel);
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.gcard:hover{transform:translateY(-4px);border-color:var(--stroke-strong);box-shadow:0 14px 34px rgba(0,0,0,.4),0 0 18px rgba(34,211,238,.14)}
.gcard__icon{
  width:46px;height:46px;border-radius:13px;display:grid;place-items:center;
  margin-bottom:14px;font-size:1.05rem;color:#03121F;
  background:linear-gradient(140deg,var(--cyan),var(--leaf));
  box-shadow:0 0 18px rgba(34,211,238,.25);
}
.gcard h3{margin-bottom:8px}
.gcard p{color:var(--muted);font-size:.93rem}

/* TABLE */
.table-wrap{
  border:1px solid var(--stroke);border-radius:var(--radius);
  background:var(--panel);backdrop-filter:blur(12px);
  overflow-x:auto;box-shadow:var(--shadow-soft);
}
table{width:100%;border-collapse:collapse;min-width:660px}
caption{
  text-align:left;padding:18px 22px 6px;font-size:.8rem;letter-spacing:.1em;
  text-transform:uppercase;color:var(--cyan);font-weight:600;
}
th,td{padding:15px 22px;text-align:left;font-size:.92rem;border-bottom:1px solid rgba(56,189,248,.12)}
thead th{
  font-size:.74rem;letter-spacing:.12em;text-transform:uppercase;color:var(--muted-2);
  background:rgba(34,211,238,.05);font-weight:600;
}
tbody tr{transition:background .2s ease}
tbody tr:hover{background:rgba(34,211,238,.06)}
tbody td:first-child{color:#fff;font-weight:600}
tbody tr:last-child td{border-bottom:0}
.angle-pill{
  display:inline-block;padding:3px 11px;border-radius:999px;font-weight:700;font-size:.85rem;
  color:var(--cyan);background:rgba(34,211,238,.12);border:1px solid rgba(34,211,238,.32);
}

/* STEPS */
.steps{display:grid;gap:14px;counter-reset:step}
.step{
  display:grid;grid-template-columns:58px minmax(0,1fr);gap:20px;align-items:start;
  padding:20px 24px;border-radius:var(--radius);
  border:1px solid var(--stroke);border-left:3px solid rgba(34,211,238,.5);
  background:linear-gradient(90deg,rgba(34,211,238,.07),rgba(9,28,46,.6) 30%);
  transition:.25s ease;
}
.step:hover{border-left-color:var(--cyan);background:linear-gradient(90deg,rgba(34,211,238,.14),rgba(9,28,46,.7) 34%)}
.step__num{
  width:44px;height:44px;border-radius:13px;display:grid;place-items:center;
  font-weight:800;font-size:1rem;color:#03121F;
  background:linear-gradient(140deg,var(--cyan),var(--blue));
  box-shadow:var(--glow);
}
.step h3{margin-bottom:6px}
.step p{color:var(--muted);font-size:.93rem;margin:0}

/* SPLIT */
.split{display:grid;grid-template-columns:minmax(0,1.08fr) minmax(0,.92fr);gap:38px;align-items:center}
.split--reverse{grid-template-columns:minmax(0,.92fr) minmax(0,1.08fr)}
.media{
  position:relative;border-radius:var(--radius-lg);overflow:hidden;
  border:1px solid var(--stroke);box-shadow:var(--shadow);
}
.media img{width:100%;height:100%;object-fit:cover;aspect-ratio:16/11}
.media__caption{
  position:absolute;left:0;right:0;bottom:0;padding:16px 18px;font-size:.84rem;color:#D9ECFB;
  background:linear-gradient(180deg,rgba(2,10,20,0),rgba(2,10,20,.92));
}
.tier-list{display:grid;gap:12px;margin-top:20px}
.tier{
  display:flex;align-items:flex-start;gap:14px;
  padding:14px 16px;border-radius:var(--radius-sm);
  border:1px solid var(--stroke);background:rgba(6,20,34,.5);
}
.tier b{color:var(--gold);font-size:.95rem;min-width:86px;display:inline-block}
.tier span{color:var(--muted);font-size:.9rem}

/* MISTAKES */
.mistake{
  display:grid;grid-template-columns:40px minmax(0,1fr);gap:16px;align-items:start;
  padding:18px 20px;border-radius:var(--radius);
  border:1px solid var(--stroke);background:rgba(6,20,34,.55);
  transition:.25s ease;
}
.mistake:hover{border-color:rgba(251,113,133,.45);transform:translateX(3px)}
.mistake i{color:var(--danger);font-size:1.05rem;padding-top:4px}
.mistake h3{margin-bottom:6px;font-size:1rem}
.mistake p{margin:0;color:var(--muted);font-size:.92rem}
.mistake p b{color:var(--leaf);font-weight:600}

/* COMPARE */
.compare{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}
.compare__col{
  border:1px solid var(--stroke);border-radius:var(--radius);
  background:var(--panel);backdrop-filter:blur(12px);padding:24px 22px;
}
.compare__col--accent{
  border-color:var(--stroke-strong);
  background:linear-gradient(160deg,rgba(34,211,238,.12),rgba(9,28,46,.78));
  box-shadow:0 0 26px rgba(34,211,238,.16);
}
.compare__col h3{display:flex;align-items:center;gap:10px;font-size:1.1rem;margin-bottom:16px}
.compare__col ul{display:grid;gap:11px}
.compare__col li{display:flex;gap:11px;align-items:flex-start;font-size:.93rem;color:var(--muted)}
.compare__col li i{margin-top:5px;font-size:.8rem;color:var(--cyan)}
.compare__col--accent li i{color:var(--leaf)}

/* FAQ */
.faq{display:grid;gap:12px}
.faq details{
  border:1px solid var(--stroke);border-radius:var(--radius);
  background:rgba(6,20,34,.6);overflow:hidden;transition:.25s ease;
}
.faq details[open]{border-color:var(--stroke-strong);background:rgba(9,28,46,.78);box-shadow:0 0 20px rgba(34,211,238,.12)}
.faq summary{
  cursor:pointer;list-style:none;padding:18px 54px 18px 22px;position:relative;
  font-weight:600;font-size:1rem;line-height:1.5;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{
  content:"\f067";font-family:"Font Awesome 6 Free";font-weight:900;font-size:.8rem;
  position:absolute;right:20px;top:50%;transform:translateY(-50%);
  color:var(--cyan);transition:transform .25s ease;
}
.faq details[open] summary::after{content:"\f068";transform:translateY(-50%) rotate(180deg)}
.faq .faq__body{padding:0 22px 20px;color:var(--muted);font-size:.94rem}

/* CTA */
.cta-band{
  position:relative;overflow:hidden;
  border:1px solid var(--stroke-strong);border-radius:var(--radius-lg);
  padding:44px 40px;
  background:
    radial-gradient(600px 300px at 12% 0%, rgba(34,211,238,.22), transparent 62%),
    linear-gradient(140deg,rgba(9,28,46,.95),rgba(4,18,31,.9));
  box-shadow:var(--shadow);
  display:grid;grid-template-columns:minmax(0,1.35fr) minmax(0,.65fr);gap:30px;align-items:center;
}
.cta-band h2{margin-bottom:12px}
.cta-band p{color:#B7CFE3}
.cta-actions{margin-top:22px;display:flex;gap:14px;flex-wrap:wrap}
.cta-badges{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}
.cta-badges span{
  font-size:.76rem;color:var(--muted);border:1px solid var(--stroke);
  border-radius:999px;padding:6px 13px;background:rgba(6,20,34,.5);
}
.cta-visual{
  border-radius:var(--radius);overflow:hidden;border:1px solid var(--stroke);
}
.cta-visual img{aspect-ratio:4/3;object-fit:cover;width:100%}

/* FOOTER */
.site-footer{
  border-top:1px solid rgba(56,189,248,.14);
  background:linear-gradient(180deg,rgba(2,10,20,.4),rgba(1,7,16,.96));
  padding:56px 0 30px;margin-top:20px;
}
.footer-grid{display:grid;grid-template-columns:minmax(0,1.5fr) repeat(3,minmax(0,1fr));gap:32px}
.footer-brand p{color:var(--muted);font-size:.9rem;margin-top:16px;max-width:420px}
.footer-col h3{
  font-size:.76rem;letter-spacing:.13em;text-transform:uppercase;color:var(--muted-2);
  margin-bottom:16px;font-weight:600;
}
.footer-col ul{display:grid;gap:10px}
.footer-col a{font-size:.9rem;color:var(--muted);transition:.2s ease}
.footer-col a:hover{color:var(--cyan);padding-left:4px}
.footer-bottom{
  margin-top:40px;padding-top:22px;border-top:1px solid rgba(56,189,248,.12);
  display:flex;justify-content:space-between;align-items:center;gap:18px;flex-wrap:wrap;
}
.footer-bottom p{margin:0;font-size:.84rem;color:var(--muted-2)}
.footer-badges{display:flex;gap:10px;flex-wrap:wrap}
.footer-badges span{
  font-size:.74rem;color:var(--muted);border:1px solid var(--stroke);
  border-radius:999px;padding:5px 12px;background:rgba(6,20,34,.5);
}

/* STICKY BOTTOM CTA */
.sticky-cta{
  position:fixed;left:0;right:0;bottom:0;z-index:55;
  background:rgba(3,12,22,.92);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border-top:1px solid rgba(34,211,238,.28);
  padding:12px 0;
}
.sticky-cta__inner{display:flex;align-items:center;justify-content:space-between;gap:16px}
.sticky-cta__text{font-size:.88rem;color:#C7DCEF;display:flex;align-items:center;gap:10px}
.sticky-cta__text i{color:var(--cyan)}

/* FAB */
.fab{
  position:fixed;left:16px;bottom:96px;z-index:58;
  display:inline-flex;align-items:center;gap:9px;
  padding:12px 18px;border-radius:999px;
  background:rgba(7,16,29,.85);
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  border:1px solid transparent;
  background-image:linear-gradient(rgba(7,16,29,.9),rgba(7,16,29,.9)),
    linear-gradient(120deg,var(--cyan),var(--leaf));
  background-origin:border-box;background-clip:padding-box,border-box;
  color:#DDF6FF;font-size:.84rem;font-weight:600;
  box-shadow:0 0 20px rgba(34,211,238,.45);
  transition:transform .25s ease,box-shadow .25s ease,color .25s ease;
}
.fab:hover{transform:translateY(-3px) scale(1.03);box-shadow:0 0 30px rgba(34,211,238,.7);color:#fff}
.fab:active{transform:scale(.97)}
.fab i{color:var(--cyan)}
.fab__dot{
  position:absolute;top:-3px;right:-3px;width:11px;height:11px;border-radius:50%;
  background:var(--cyan);box-shadow:0 0 0 3px rgba(2,10,20,.9);
  animation:pulse 1.8s infinite;
}
@keyframes pulse{
  0%,100%{opacity:.55;transform:scale(.9)}
  50%{opacity:1;transform:scale(1.15)}
}
.float-y{animation:floaty 5s ease-in-out infinite}
@keyframes floaty{0%,100%{transform:translateY(0)}50%{transform:translateY(-6px)}}

/* RESPONSIVE */
@media (max-width:1024px){
  .hero-grid{grid-template-columns:1fr;gap:28px}
  .grid--4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .split,.split--reverse{grid-template-columns:1fr;gap:28px}
  .split--reverse .media{order:-1}
  .cta-band{grid-template-columns:1fr;padding:38px 30px}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .section-head--split{grid-template-columns:1fr;gap:14px}
}
@media (max-width:768px){
  .section{padding:56px 0}
  .hero{padding:34px 0 54px}
  .hero-cut{padding:40px 24px 44px;clip-path:polygon(0 0,100% 2.5%,100% 100%,0 97.5%)}
  .grid--3{grid-template-columns:1fr}
  .hero-grid{padding-top:6px}
  .compare{grid-template-columns:1fr}
  .sticky-cta__text{display:none}
  .sticky-cta__inner{justify-content:center}
  .sticky-cta .btn{width:100%}
  .faq summary{padding:16px 48px 16px 18px;font-size:.95rem}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}
@media (max-width:520px){
  body{font-size:15px;padding-bottom:84px}
  .container{padding:0 16px}
  .brand__text small{display:none}
  .brand__text strong{font-size:.86rem}
  .brand__mark{width:38px;height:38px;border-radius:12px;font-size:.92rem}
  .header-actions .btn{padding:8px 13px;font-size:.8rem}
  .grid--4,.grid--2{grid-template-columns:1fr}
  .step{grid-template-columns:1fr;gap:12px;padding:18px}
  .cta-band{padding:30px 20px}
  .fab{left:12px;bottom:92px;padding:11px 15px;font-size:.78rem}
  .footer-grid{grid-template-columns:1fr;gap:26px}
  table{min-width:560px}
  th,td{padding:12px 16px}
}

/* roulang page: category3 */
:root{
  --bg:#020A14;
  --bg-soft:#04121F;
  --bg-deep:#010710;
  --panel:rgba(9,28,46,.74);
  --panel-solid:#071B2C;
  --stroke:rgba(56,189,248,.18);
  --stroke-strong:rgba(34,211,238,.5);
  --text:#EAF6FF;
  --muted:#8FA6BD;
  --muted-2:#6C8299;
  --cyan:#22D3EE;
  --blue:#2E7DF7;
  --teal:#0EA5A5;
  --leaf:#5EEAD4;
  --gold:#F5C451;
  --danger:#FB7185;
  --radius-lg:24px;
  --radius:16px;
  --radius-sm:10px;
  --shadow:0 18px 45px rgba(0,0,0,.45);
  --shadow-soft:0 10px 30px rgba(0,0,0,.32);
  --glow:0 0 22px rgba(34,211,238,.35);
  --glow-strong:0 0 34px rgba(34,211,238,.5);
  --maxw:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:'Be Vietnam Pro',system-ui,-apple-system,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;
  font-size:16px;
  line-height:1.66;
  color:var(--text);
  background-color:var(--bg);
  background-image:
    radial-gradient(1100px 620px at 10% -10%, rgba(34,211,238,.16), transparent 60%),
    radial-gradient(900px 560px at 90% 2%, rgba(46,125,247,.18), transparent 62%),
    linear-gradient(180deg,#020A14 0%,#04121F 42%,#020A14 100%);
  background-attachment:fixed;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
button,input{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0 0 12px;line-height:1.3;font-weight:700;letter-spacing:-.01em}
h1{font-size:clamp(1.6rem,3.1vw,2.45rem);font-weight:800;line-height:1.24}
h2{font-size:clamp(1.32rem,2.15vw,1.86rem)}
h3{font-size:1.06rem}
p{margin:0 0 12px}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:6px}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 20px}
.section{position:relative;padding:74px 0;border-top:1px solid rgba(56,189,248,.09)}
.section--plain{border-top:0}
.section--deep{background:linear-gradient(180deg,rgba(2,10,20,.35),rgba(4,18,31,.72) 40%,rgba(2,10,20,.4))}
.section--band{
  background:
    radial-gradient(700px 320px at 15% 0%, rgba(14,165,165,.16), transparent 65%),
    linear-gradient(180deg,rgba(4,18,31,.9),rgba(2,10,20,.55));
}
.section--img{overflow:hidden}
.section--img::before{
  content:"";position:absolute;inset:0;
  background:url('/assets/images/d7c30003c9aa946d.jpg') center/cover no-repeat;
  opacity:.22;
}
.section--img::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(2,10,20,.82),rgba(2,10,20,.94));
}
.section--img .container{position:relative;z-index:2}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:.72rem;font-weight:600;letter-spacing:.14em;text-transform:uppercase;
  color:var(--cyan);background:rgba(34,211,238,.09);
  border:1px solid rgba(34,211,238,.28);border-radius:999px;
  padding:6px 13px;margin-bottom:16px;
}
.section-head{max-width:800px;margin-bottom:34px}
.section-head p{color:var(--muted);margin:10px 0 0}
.section-head--split{max-width:none;display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);gap:28px;align-items:end}
.lead{color:var(--muted);font-size:1.02rem}
.muted{color:var(--muted)}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  padding:12px 22px;border-radius:999px;border:1px solid transparent;
  font-weight:600;font-size:.94rem;cursor:pointer;text-align:center;line-height:1.4;
  transition:transform .22s ease,box-shadow .22s ease,background .22s ease,color .22s ease,border-color .22s ease;
  white-space:nowrap;
}
.btn--primary{background:linear-gradient(120deg,var(--cyan),var(--blue));color:#03121F;font-weight:700;box-shadow:var(--glow)}
.btn--primary:hover{transform:translateY(-2px);box-shadow:var(--glow-strong)}
.btn--primary:active{transform:translateY(0) scale(.98)}
.btn--ghost{background:rgba(34,211,238,.06);border-color:rgba(34,211,238,.4);color:#CFF6FF}
.btn--ghost:hover{background:rgba(34,211,238,.15);border-color:var(--cyan);transform:translateY(-2px)}
.btn--outline{background:transparent;border-color:rgba(148,166,189,.35);color:var(--text)}
.btn--outline:hover{border-color:var(--cyan);color:var(--cyan);transform:translateY(-2px)}
.btn--sm{padding:9px 16px;font-size:.84rem}
.tag{
  display:inline-block;font-size:.7rem;font-weight:600;letter-spacing:.1em;text-transform:uppercase;
  padding:4px 10px;border-radius:999px;color:var(--leaf);
  background:rgba(94,234,212,.1);border:1px solid rgba(94,234,212,.28);
}
.tag--gold{color:var(--gold);background:rgba(245,196,81,.1);border-color:rgba(245,196,81,.3)}
.tag--danger{color:var(--danger);background:rgba(251,113,133,.1);border-color:rgba(251,113,133,.3)}
/* HEADER */
.site-header{position:sticky;top:0;z-index:60;background:rgba(2,10,20,.86);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border-bottom:1px solid rgba(56,189,248,.14)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:13px 0}
.brand{display:flex;align-items:center;gap:12px;min-width:0}
.brand__mark{
  flex:0 0 auto;width:44px;height:44px;border-radius:14px;display:grid;place-items:center;
  background:linear-gradient(140deg,var(--teal),var(--blue));
  color:#03121F;font-size:1.05rem;box-shadow:var(--glow);
}
.brand__text{min-width:0}
.brand__text strong{display:block;font-size:.97rem;font-weight:700;line-height:1.25;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.brand__text small{display:block;font-size:.68rem;letter-spacing:.13em;text-transform:uppercase;color:var(--muted-2)}
.header-actions{display:flex;align-items:center;gap:9px;flex:0 0 auto}
.main-nav{border-top:1px solid rgba(56,189,248,.1);background:rgba(3,12,22,.55)}
.nav-scroll{display:flex;gap:6px;overflow-x:auto;padding:8px 20px;scrollbar-width:none}
.nav-scroll::-webkit-scrollbar{display:none}
.nav-link{
  display:inline-block;padding:9px 15px;border-radius:11px;font-size:.88rem;font-weight:500;color:var(--muted);
  white-space:nowrap;border:1px solid transparent;transition:.24s ease;
}
.nav-link:hover{color:var(--text);background:rgba(34,211,238,.08);border-color:rgba(34,211,238,.24)}
.nav-link.is-active{color:#03121F;font-weight:700;background:linear-gradient(120deg,var(--cyan),var(--leaf));box-shadow:0 0 16px rgba(34,211,238,.35)}
/* HERO chuyên mục */
.c-hero{position:relative;padding:46px 0 54px;overflow:hidden;border-bottom:1px solid rgba(56,189,248,.12)}
.c-hero::before{
  content:"";position:absolute;inset:0;
  background:
    radial-gradient(720px 340px at 88% 6%, rgba(34,211,238,.2), transparent 62%),
    radial-gradient(620px 320px at 6% 92%, rgba(14,165,165,.2), transparent 65%);
}
.c-hero::after{
  content:"";position:absolute;inset:0;
  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:54px 54px;
  -webkit-mask-image:linear-gradient(180deg,rgba(0,0,0,.85),transparent 82%);
  mask-image:linear-gradient(180deg,rgba(0,0,0,.85),transparent 82%);
}
.c-hero .container{position:relative;z-index:2}
.c-hero__grid{display:grid;grid-template-columns:minmax(0,1.32fr) minmax(0,.88fr);gap:30px;align-items:start}
.c-hero__copy p{max-width:640px}
.c-hero__cta{display:flex;flex-wrap:wrap;gap:11px;margin:22px 0 0}
.crumbs{display:flex;flex-wrap:wrap;gap:8px;align-items:center;font-size:.8rem;color:var(--muted-2);margin-bottom:16px}
.crumbs a:hover{color:var(--cyan)}
.crumbs i{font-size:.62rem}
.icon-matrix{
  display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;padding:16px;
  border-radius:var(--radius-lg);border:1px solid var(--stroke);
  background:var(--panel);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  box-shadow:var(--shadow-soft);
}
.icon-matrix__title{grid-column:1/-1;font-size:.72rem;letter-spacing:.14em;text-transform:uppercase;color:var(--cyan);font-weight:600;margin-bottom:2px}
.im-item{
  display:flex;align-items:center;gap:10px;padding:11px 12px;border-radius:12px;
  background:rgba(3,14,26,.62);border:1px solid rgba(56,189,248,.13);
  font-size:.85rem;color:var(--text);transition:.24s ease;
}
.im-item i{color:var(--cyan);flex:0 0 auto}
.im-item:hover{border-color:var(--stroke-strong);transform:translateY(-2px)}
.stat-bar{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;margin-top:30px}
.stat{
  padding:15px 17px;border-radius:var(--radius);border:1px solid var(--stroke);
  background:rgba(6,20,34,.66);backdrop-filter:blur(10px);
}
.stat b{display:block;font-size:1.16rem;font-weight:800;color:var(--cyan);line-height:1.2}
.stat span{display:block;margin-top:4px;font-size:.78rem;color:var(--muted)}
/* Tiles */
.tile-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}
.tile-grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.tile{
  padding:22px;border-radius:var(--radius);border:1px solid var(--stroke);
  background:var(--panel);backdrop-filter:blur(10px);
  transition:transform .26s ease,border-color .26s ease,box-shadow .26s ease;
}
.tile:hover{transform:translateY(-4px);border-color:var(--stroke-strong);box-shadow:var(--shadow-soft)}
.tile__ico{
  width:44px;height:44px;border-radius:13px;display:grid;place-items:center;margin-bottom:14px;
  background:linear-gradient(140deg,rgba(34,211,238,.22),rgba(46,125,247,.22));
  border:1px solid rgba(34,211,238,.3);color:var(--cyan);font-size:1rem;
}
.tile h3{margin-bottom:8px}
.tile p{color:var(--muted);font-size:.92rem;margin:0}
/* Split */
.split-2{display:grid;grid-template-columns:minmax(0,.86fr) minmax(0,1.14fr);gap:30px;align-items:start}
.spec-list{border:1px solid var(--stroke);border-radius:var(--radius);overflow:hidden;background:rgba(4,16,28,.72)}
.spec-row{
  display:grid;grid-template-columns:minmax(0,.95fr) minmax(0,1.05fr);gap:14px;
  padding:14px 18px;border-top:1px solid rgba(56,189,248,.12);font-size:.92rem;
}
.spec-row:first-child{border-top:0}
.spec-row span{color:var(--muted)}
.spec-row b{color:var(--leaf);font-weight:600}
/* Steps */
.steps{display:grid;gap:13px}
.step{
  display:grid;grid-template-columns:52px minmax(0,1fr);gap:16px;align-items:start;
  padding:17px 19px;border-radius:var(--radius);border:1px solid var(--stroke);
  background:rgba(5,18,32,.68);transition:.26s ease;
}
.step:hover{border-color:var(--stroke-strong);transform:translateX(4px)}
.step__num{
  width:44px;height:44px;border-radius:14px;display:grid;place-items:center;
  background:linear-gradient(140deg,var(--teal),var(--blue));color:#03121F;font-weight:800;font-size:1rem;
}
.step h3{margin:2px 0 6px}
.step p{margin:0;color:var(--muted);font-size:.92rem}
/* Compare */
.compare{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
.compare__col{padding:24px;border-radius:var(--radius-lg);border:1px solid var(--stroke);background:var(--panel);backdrop-filter:blur(10px)}
.compare__col--on{border-color:rgba(94,234,212,.38);box-shadow:0 0 26px rgba(94,234,212,.12)}
.compare__col--off{border-color:rgba(251,113,133,.32)}
.compare__head{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.compare__head i{width:36px;height:36px;border-radius:11px;display:grid;place-items:center;font-size:.92rem}
.compare__col--on .compare__head i{background:rgba(94,234,212,.14);color:var(--leaf);border:1px solid rgba(94,234,212,.32)}
.compare__col--off .compare__head i{background:rgba(251,113,133,.13);color:var(--danger);border:1px solid rgba(251,113,133,.3)}
.compare__head h3{margin:0;font-size:1.02rem}
.check-list li{display:flex;gap:10px;align-items:flex-start;padding:9px 0;border-bottom:1px dashed rgba(56,189,248,.14);color:var(--muted);font-size:.92rem}
.check-list li:last-child{border-bottom:0}
.check-list i{margin-top:4px;flex:0 0 auto}
.check-list--on i{color:var(--leaf)}
.check-list--off i{color:var(--danger)}
/* Media split */
.media-split{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.05fr);gap:30px;align-items:center}
.media-figure{position:relative;border-radius:var(--radius-lg);overflow:hidden;border:1px solid var(--stroke);box-shadow:var(--shadow)}
.media-figure img{width:100%;height:auto}
.media-figure figcaption{
  position:absolute;left:0;right:0;bottom:0;padding:14px 18px;font-size:.82rem;color:#DDF6FF;
  background:linear-gradient(180deg,transparent,rgba(2,10,20,.92));
}
.note-list li{display:flex;gap:11px;align-items:flex-start;padding:11px 0;border-bottom:1px solid rgba(56,189,248,.1);color:var(--muted)}
.note-list li:last-child{border-bottom:0}
.note-list i{color:var(--cyan);margin-top:4px;flex:0 0 auto}
.note-list b{color:var(--text);font-weight:600}
/* Category matrix */
.cat-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
.cat-card{
  display:block;padding:24px;border-radius:var(--radius);
  border:1px solid var(--stroke);
  background:linear-gradient(160deg,rgba(9,28,46,.86),rgba(3,12,22,.72));
  transition:transform .26s ease,border-color .26s ease,box-shadow .26s ease;
}
.cat-card:hover{transform:translateY(-5px);border-color:var(--stroke-strong);box-shadow:0 0 28px rgba(34,211,238,.2)}
.cat-card i.cat-card__ico{
  width:46px;height:46px;border-radius:14px;display:grid;place-items:center;margin-bottom:14px;
  background:linear-gradient(140deg,rgba(34,211,238,.22),rgba(14,165,165,.22));
  border:1px solid rgba(34,211,238,.3);color:var(--cyan);
}
.cat-card h3{margin-bottom:8px}
.cat-card p{color:var(--muted);font-size:.9rem;margin:0 0 14px}
.cat-card span.cat-card__more{font-size:.84rem;font-weight:600;color:var(--cyan);display:inline-flex;align-items:center;gap:7px}
/* FAQ */
.faq{display:grid;gap:12px;max-width:940px}
.faq details{
  border:1px solid var(--stroke);border-radius:var(--radius);
  background:rgba(5,18,32,.68);padding:15px 18px;transition:border-color .24s ease,background .24s ease;
}
.faq details[open]{border-color:var(--stroke-strong);background:rgba(7,24,40,.82)}
.faq summary{
  list-style:none;cursor:pointer;display:flex;justify-content:space-between;align-items:flex-start;gap:14px;
  font-weight:600;font-size:.98rem;color:var(--text);
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{
  content:"\f067";font-family:"Font Awesome 6 Free";font-weight:900;color:var(--cyan);
  font-size:.8rem;transition:transform .25s ease;flex:0 0 auto;margin-top:4px;
}
.faq details[open] summary::after{content:"\f068"}
.faq details p{margin:12px 0 0;color:var(--muted);font-size:.93rem}
/* CTA */
.cta-band{
  position:relative;padding:34px 32px;border-radius:var(--radius-lg);
  border:1px solid var(--stroke-strong);
  background:linear-gradient(120deg,rgba(34,211,238,.14),rgba(46,125,247,.16));
  box-shadow:0 0 38px rgba(34,211,238,.16);
  display:grid;grid-template-columns:minmax(0,1.2fr) minmax(0,.8fr);gap:26px;align-items:center;
}
.cta-band h2{margin-bottom:10px}
.cta-band p{color:#CBE7F7;margin:0}
.cta-actions{display:flex;flex-wrap:wrap;gap:11px;justify-content:flex-end}
.trust-strip{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}
.trust-strip span{
  display:inline-flex;align-items:center;gap:7px;font-size:.78rem;color:var(--muted);
  border:1px solid var(--stroke);border-radius:999px;padding:6px 12px;background:rgba(5,18,32,.6);
}
.trust-strip i{color:var(--cyan)}
/* FAB */
.fab{
  position:fixed;left:16px;bottom:96px;z-index:50;
  width:58px;height:58px;border-radius:999px;display:grid;place-items:center;
  border:2px solid transparent;
  background:
    linear-gradient(rgba(7,7,13,.86),rgba(7,7,13,.86)) padding-box,
    linear-gradient(135deg,var(--cyan),var(--leaf)) border-box;
  color:var(--cyan);font-size:1.15rem;
  box-shadow:0 0 20px rgba(6,182,212,.45);
  backdrop-filter:blur(10px);
  animation:fabPulse 3.4s ease-in-out infinite;
  transition:transform .25s ease,box-shadow .25s ease;
}
.fab:hover{transform:scale(1.08);opacity:1;box-shadow:0 0 30px rgba(6,182,212,.7)}
.fab:active{transform:scale(.94)}
.fab__dot{
  position:absolute;top:6px;right:6px;width:11px;height:11px;border-radius:999px;
  background:#FB7185;box-shadow:0 0 0 2px rgba(2,10,20,.9);animation:dotPulse 1.8s ease-in-out infinite;
}
@keyframes fabPulse{0%,100%{opacity:.78}50%{opacity:1}}
@keyframes dotPulse{0%,100%{transform:scale(1);opacity:1}50%{transform:scale(1.35);opacity:.65}}
/* FOOTER */
.site-footer{border-top:1px solid rgba(56,189,248,.16);background:linear-gradient(180deg,rgba(3,12,22,.6),rgba(1,7,16,.96));padding:52px 0 26px;margin-top:10px}
.footer-grid{display:grid;grid-template-columns:minmax(0,1.5fr) repeat(3,minmax(0,1fr));gap:28px}
.footer-brand p{color:var(--muted);font-size:.9rem;margin:16px 0 0;max-width:420px}
.footer-col h3{font-size:.78rem;letter-spacing:.13em;text-transform:uppercase;color:var(--cyan);margin-bottom:14px}
.footer-col li{margin-bottom:9px}
.footer-col a{color:var(--muted);font-size:.9rem;transition:.22s ease}
.footer-col a:hover{color:var(--cyan)}
.footer-bottom{
  margin-top:36px;padding-top:20px;border-top:1px solid rgba(56,189,248,.12);
  display:flex;flex-wrap:wrap;gap:14px;align-items:center;justify-content:space-between;
}
.footer-bottom p{margin:0;font-size:.82rem;color:var(--muted-2)}
.footer-badges{display:flex;flex-wrap:wrap;gap:9px}
.footer-badges span{font-size:.74rem;color:var(--muted);border:1px solid var(--stroke);border-radius:999px;padding:5px 11px;background:rgba(5,18,32,.6)}
/* Responsive */
@media(max-width:1024px){
  .c-hero__grid{grid-template-columns:1fr;gap:24px}
  .icon-matrix{grid-template-columns:repeat(3,minmax(0,1fr))}
  .tile-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .tile-grid--3{grid-template-columns:repeat(2,minmax(0,1fr))}
  .cat-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .split-2{grid-template-columns:1fr}
  .media-split{grid-template-columns:1fr}
  .cta-band{grid-template-columns:1fr}
  .cta-actions{justify-content:flex-start}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .section-head--split{grid-template-columns:1fr;gap:12px}
}
@media(max-width:768px){
  .section{padding:56px 0}
  .stat-bar{grid-template-columns:repeat(2,minmax(0,1fr))}
  .icon-matrix{grid-template-columns:repeat(2,minmax(0,1fr))}
  .compare{grid-template-columns:1fr}
  .spec-row{grid-template-columns:1fr;gap:4px}
  .nav-scroll{padding:8px 16px}
  .cta-band{padding:26px 20px}
}
@media(max-width:520px){
  .container{padding:0 16px}
  .header-inner{padding:11px 0}
  .brand__mark{width:38px;height:38px;border-radius:12px;font-size:.95rem}
  .brand__text strong{font-size:.84rem;max-width:150px}
  .brand__text small{display:none}
  .header-actions{gap:7px}
  .header-actions .btn{padding:9px 13px;font-size:.8rem}
  .tile-grid,.tile-grid--3,.cat-grid{grid-template-columns:1fr}
  .stat-bar{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .step{grid-template-columns:1fr;gap:10px}
  .fab{width:54px;height:54px;left:14px;bottom:84px}
  .btn{width:100%}
  .c-hero__cta .btn,.cta-actions .btn{width:100%}
}

/* roulang: framework shim */
/* 覆盖 Bootstrap 等对 a/btn 的全局默认，避免导航出现下划线/蓝链 */
.site-header a,.site-header a:hover,.navbar a,.navbar a:hover,.nav-links a,.nav-links a:hover,header nav a,header nav a:hover{text-decoration:none}
.site-header .btn,.navbar .btn,.nav-cta{text-decoration:none}