/* === Nền tảng chung === */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --bg:#070b14;--bg-card:#10182a;--bg-card-hover:#15233b;
  --border:rgba(167,190,255,.12);--border-hover:rgba(167,190,255,.24);
  --text:#eef3ff;--text-muted:#9aa7c2;--text-heading:#eef3ff;
  --text-soft:#c9d4ec;
  --accent:#7c5cff;--accent-hover:#9278ff;--accent-glow:rgba(124,92,255,.22);
  --accent-2:#34d1ff;--accent-3:#76ffb4;
  --green:#00b894;--blue:#34d1ff;
  --radius:24px;--radius-md:18px;--radius-sm:12px;
  --max-w:1180px;
  --shadow:0 18px 60px rgba(2,8,23,.45);--shadow-soft:0 10px 30px rgba(2,8,23,.3);
  --font-body:'Inter',system-ui,sans-serif;
  --font-heading:'Montserrat','Inter',system-ui,sans-serif;
}
html{scroll-behavior:smooth;font-size:16px}
body{
  font-family:var(--font-body);line-height:1.6;color:var(--text);
  background:
    radial-gradient(circle at top left,rgba(124,92,255,.2),transparent 26%),
    radial-gradient(circle at top right,rgba(52,209,255,.12),transparent 22%),
    linear-gradient(180deg,#07101c 0%,#09101b 38%,#060912 100%);
  -webkit-font-smoothing:antialiased;min-height:100vh;overflow-x:hidden;
}
a{color:var(--accent-2);text-decoration:none;transition:color .2s ease,transform .2s ease}
a:hover{color:#8ae3ff}
img{max-width:100%;display:block}
h1,h2,h3,h4{font-family:var(--font-heading);color:var(--text-heading);line-height:1.15}
p{color:var(--text-muted)}

/* === Thành phần dùng chung === */
.container{max-width:var(--max-w);margin:0 auto;padding:0 24px}
.header{
  position:fixed;top:0;left:0;right:0;z-index:100;
  background:rgba(7,12,22,.72);backdrop-filter:blur(18px);
  border-bottom:1px solid rgba(160,183,255,.1);padding:0 24px;
}
.header .container{display:flex;align-items:center;justify-content:space-between;gap:18px;height:72px}
.logo{font-family:var(--font-heading);font-size:1.42rem;font-weight:800;color:var(--text-heading);letter-spacing:-.03em}
.logo span{color:var(--accent-2)}
.nav{display:flex;align-items:center;gap:26px;flex-wrap:wrap;justify-content:flex-end}
.nav a{color:#8390a8;font-size:.92rem;font-weight:600;transition:color .2s ease,opacity .2s ease}
.nav a:hover,.nav a.active{color:var(--text-heading)}
.nav a.btn-primary,.nav a.btn-primary:hover{color:#fdfdff}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 20px;border-radius:999px;border:1px solid transparent;
  cursor:pointer;font-size:.92rem;font-weight:700;
  transition:transform .2s ease,border-color .2s ease,background .2s ease,box-shadow .2s ease,color .2s ease;
}
.btn:hover{transform:translateY(-1px)}
.btn-primary{
  color:#fff;background:linear-gradient(135deg,var(--accent),#5da4ff);
  box-shadow:0 16px 32px rgba(124,92,255,.24);
}
.btn-primary:hover{background:linear-gradient(135deg,var(--accent-hover),#6cb0ff);color:#fff}
.btn-outline{color:var(--text);background:rgba(255,255,255,.02);border:1px solid var(--border-hover)}
.btn-outline:hover{color:var(--text);border-color:rgba(138,227,255,.45);background:rgba(255,255,255,.05)}
.btn-sm{min-height:40px;padding:0 16px;font-size:.86rem}
.footer{position:relative;z-index:1;padding:32px 0 40px;border-top:1px solid var(--border);text-align:center;background:rgba(4,8,14,.35)}
.footer p,.footer-links a{color:var(--text-muted);font-size:.88rem}
.footer-links{display:flex;flex-wrap:wrap;gap:20px;justify-content:center;margin-bottom:12px}
.footer-links a:hover{color:var(--text-heading)}

/* === Landing page === */
.landing-main{position:relative;z-index:1}
.page-glow{position:fixed;pointer-events:none;filter:blur(16px);opacity:.75;z-index:0}
.glow-1{top:80px;left:-120px;width:320px;height:320px;background:radial-gradient(circle,rgba(124,92,255,.32),transparent 70%);animation:floatGlow 10s ease-in-out infinite}
.glow-2{top:220px;right:-100px;width:280px;height:280px;background:radial-gradient(circle,rgba(52,209,255,.24),transparent 68%);animation:floatGlow 12s ease-in-out infinite reverse}
.landing-main .section-shell{padding:104px 0;position:relative}
.landing-main .section-shell-alt{background:linear-gradient(180deg,rgba(255,255,255,.02),rgba(255,255,255,.01))}

.landing-main .hero{padding:148px 0 72px;position:relative}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.08fr) minmax(420px,.92fr);gap:52px;align-items:center}
.hero-copy{max-width:640px}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;padding:10px 14px;margin-bottom:20px;
  border:1px solid rgba(118,255,180,.18);background:rgba(118,255,180,.08);
  border-radius:999px;color:#dfffee;font-size:.82rem;font-weight:700;letter-spacing:.02em;
}
.landing-main .hero h1{font-size:clamp(2.6rem,5vw,4.6rem);margin-bottom:18px;letter-spacing:-.04em}
.landing-main .hero h1 span{
  background:linear-gradient(135deg,#ffffff 10%,#8ae3ff 42%,#a28cff 76%,#ffffff 100%);
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;
}
.hero-copy p{font-size:1.08rem;max-width:620px;color:var(--text-soft);margin-bottom:30px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:22px}
.hero-points{display:flex;flex-wrap:wrap;gap:12px}
.hero-points span{padding:10px 14px;border:1px solid var(--border);border-radius:999px;background:rgba(255,255,255,.03);color:var(--text-soft);font-size:.9rem;font-weight:600}

.hero-stage{position:relative;min-height:520px}
.hero-card-main{
  position:absolute;inset:40px 28px 24px 24px;padding:22px;
  border:1px solid var(--border-hover);border-radius:32px;
  background:
    linear-gradient(180deg,rgba(9,16,28,.3),rgba(8,14,24,.8)),
    url('../images/background@1x.webp') center/cover no-repeat;
  box-shadow:var(--shadow);overflow:hidden;
}
.hero-card-main::after{content:'';position:absolute;inset:auto -20% 4% 14%;height:150px;background:radial-gradient(circle,rgba(124,92,255,.22),transparent 62%);filter:blur(20px)}
.hero-card-badge{position:relative;z-index:2;display:inline-flex;padding:8px 12px;margin-bottom:18px;border-radius:999px;background:rgba(52,209,255,.12);border:1px solid rgba(52,209,255,.22);color:#b7f2ff;font-size:.8rem;font-weight:700;text-transform:uppercase;letter-spacing:.08em}
.hero-skins-stage{position:relative;height:calc(100% - 48px);min-height:380px;isolation:isolate}
.hero-skin{position:absolute;z-index:1;--skin-shadow-width:84%;--skin-shadow-height:24%;--skin-shadow-bottom:-3%;--skin-shadow-rotate:0deg;--skin-shadow-opacity:.9}
.hero-skin::after{
  content:'';position:absolute;left:50%;bottom:var(--skin-shadow-bottom);z-index:0;
  width:var(--skin-shadow-width);height:var(--skin-shadow-height);
  transform:translateX(-50%) rotate(var(--skin-shadow-rotate));
  background:radial-gradient(ellipse at center,rgba(0,0,0,var(--skin-shadow-opacity)) 0%,rgba(0,0,0,.62) 38%,rgba(0,0,0,.28) 64%,rgba(0,0,0,0) 86%);
  filter:blur(30px);pointer-events:none;
}
.hero-skin img{position:relative;z-index:1;display:block;width:100%;height:auto;object-fit:contain;filter:drop-shadow(0 18px 38px rgba(3,10,24,.46))}
.hero-skin-bayonet{top:9%;left:22%;width:24%;transform:rotate(-26deg);animation:floatWeaponB 7s ease-in-out infinite}
.hero-skin-ak{top:16%;right:20%;width:36%;transform:rotate(18deg);animation:floatWeaponA 8s ease-in-out infinite}
.hero-skin-m4a4{left:18%;bottom:34%;width:35%;transform:rotate(-18deg);animation:floatWeaponD 9s ease-in-out infinite}
.hero-skin-karambit{right:24%;bottom:36%;width:25%;transform:rotate(12deg);animation:floatWeaponC 6.5s ease-in-out infinite}
.hero-skin-bayonet{--skin-shadow-width:96%;--skin-shadow-height:20%;--skin-shadow-bottom:-5%;--skin-shadow-rotate:-12deg}
.hero-skin-ak{--skin-shadow-width:88%;--skin-shadow-height:22%;--skin-shadow-bottom:-3%;--skin-shadow-rotate:8deg}
.hero-skin-m4a4{--skin-shadow-width:92%;--skin-shadow-height:24%;--skin-shadow-bottom:-4%;--skin-shadow-rotate:-10deg}
.hero-skin-karambit{--skin-shadow-width:88%;--skin-shadow-height:22%;--skin-shadow-bottom:-6%;--skin-shadow-rotate:10deg}
.floating-card{position:absolute;z-index:4;max-width:240px;padding:18px 18px 16px;border-radius:20px;background:rgba(18,28,46,.72);border:1px solid var(--border-hover);backdrop-filter:blur(16px);box-shadow:var(--shadow-soft)}
.floating-card strong{display:block;color:var(--text-heading);font-size:.96rem;line-height:1.45}
.floating-kicker{margin-bottom:8px;color:#b7f2ff;font-size:.76rem;font-weight:800;text-transform:uppercase;letter-spacing:.09em}
.floating-card-top{top:0;right:0;animation:floatCard 8s ease-in-out infinite}
.floating-card-bottom{left:0;bottom:0;animation:floatCard 9.5s ease-in-out infinite reverse}

.signal-strip{margin-top:44px;display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:18px}
.signal-item{display:flex;gap:14px;align-items:flex-start;padding:20px;border-radius:22px;background:rgba(255,255,255,.035);border:1px solid var(--border)}
.signal-item strong{display:block;margin-bottom:4px;font-size:.98rem;color:var(--text-heading)}
.signal-item p{font-size:.92rem;color:var(--text-muted)}
.signal-dot{flex:none;width:12px;height:12px;margin-top:8px;border-radius:50%;background:linear-gradient(135deg,var(--accent-3),var(--accent-2));box-shadow:0 0 18px rgba(118,255,180,.45)}

.section-title{text-align:center;max-width:860px;margin:0 auto 14px}
.section-title-left{text-align:left;margin:0 0 14px}
.section-kicker{display:inline-block;margin-bottom:14px;font-size:.82rem;font-weight:800;text-transform:uppercase;letter-spacing:.12em;color:#9fd4ff}
.section-title h2{font-size:clamp(2rem,3.5vw,3.1rem);letter-spacing:-.03em}
.section-subtitle{max-width:720px;margin:0 auto;color:var(--text-muted);font-size:1.02rem;text-align:center}
.section-subtitle-left{margin:0;color:var(--text-muted);text-align:left}

.features-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px;margin-top:48px}
.feature-card{padding:28px;border-radius:26px;background:linear-gradient(180deg,rgba(20,30,50,.82),rgba(13,20,36,.88));border:1px solid var(--border);box-shadow:var(--shadow-soft);transition:transform .28s ease,border-color .28s ease,box-shadow .28s ease}
.feature-card:hover{transform:translateY(-6px);border-color:rgba(138,227,255,.26);box-shadow:var(--shadow)}
.feature-icon{width:56px;height:56px;border-radius:18px;display:flex;align-items:center;justify-content:center;font-size:1.55rem;margin-bottom:18px;background:linear-gradient(135deg,rgba(124,92,255,.22),rgba(52,209,255,.18));border:1px solid rgba(138,227,255,.14)}
.feature-card h3{font-size:1.12rem;margin-bottom:10px}
.feature-card p{font-size:.95rem;color:var(--text-muted)}

.steps-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px;margin-top:48px}
.step-card{position:relative;padding:28px;border-radius:26px;background:linear-gradient(180deg,rgba(15,23,39,.85),rgba(11,18,32,.95));border:1px solid var(--border);box-shadow:var(--shadow-soft)}
.step-number{width:58px;height:58px;border-radius:18px;margin-bottom:18px;display:flex;align-items:center;justify-content:center;font-size:1.25rem;font-weight:800;color:#fff;background:linear-gradient(135deg,var(--accent),#5c8dff 60%,var(--accent-2));box-shadow:0 16px 26px rgba(92,141,255,.28)}
.step-card h3{margin-bottom:10px;font-size:1.08rem}
.step-card p{font-size:.95rem}

.earn-layout{display:grid;grid-template-columns:minmax(0,1fr) minmax(340px,.88fr);gap:30px;align-items:center}
.earn-copy{max-width:620px}
.earn-list{list-style:none;display:grid;gap:12px;margin:28px 0 30px}
.earn-list li{position:relative;padding-left:30px;color:var(--text-soft)}
.earn-list li::before{content:'✓';position:absolute;left:0;top:0;color:#8ae3ff;font-weight:800}
.earn-showcase{position:relative;min-height:460px;padding:30px 30px 24px;border-radius:30px;background:linear-gradient(180deg,rgba(17,26,44,.9),rgba(10,16,28,.9));border:1px solid var(--border);box-shadow:var(--shadow);text-align:center;overflow:hidden;isolation:isolate;display:flex;align-items:flex-end}
.earn-showcase::before{content:'';position:absolute;inset:0;background:url('/images/background-agent@1x.webp') center bottom/cover no-repeat;opacity:.92;z-index:0;pointer-events:none}
.earn-agent-stage{position:absolute;inset:18px 24px 72px;display:flex;align-items:flex-end;justify-content:center;z-index:1;pointer-events:none}
.earn-agent-stage img{position:relative;z-index:1;width:min(100%,360px);max-height:100%;object-fit:contain;filter:drop-shadow(0 28px 42px rgba(4,10,24,.52));animation:floatCard 8.5s ease-in-out infinite}
.glass-note{position:relative;z-index:2;width:100%;padding:18px 20px;border-radius:18px;background:rgba(255,255,255,.05);border:1px solid rgba(138,227,255,.14);color:var(--text-soft);backdrop-filter:blur(10px)}

.contact-panel{display:flex;justify-content:space-between;gap:24px;align-items:center;margin-bottom:28px;padding:28px;border-radius:28px;background:linear-gradient(135deg,rgba(124,92,255,.16),rgba(52,209,255,.08));border:1px solid rgba(138,227,255,.16)}
.contact-copy h2{font-size:clamp(1.8rem,3vw,2.6rem);margin-bottom:12px}
.contact-copy p{max-width:640px;color:var(--text-soft)}
.contact-panel .btn{justify-content:center;text-align:center;white-space:nowrap}
.contact-cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
.contact-card{display:flex;align-items:center;gap:16px;padding:24px;border-radius:24px;background:linear-gradient(180deg,rgba(18,28,46,.84),rgba(12,19,34,.92));border:1px solid var(--border);box-shadow:var(--shadow-soft);transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease}
.contact-card:hover{transform:translateY(-4px);border-color:rgba(138,227,255,.26);box-shadow:var(--shadow)}
.contact-card .icon{width:54px;height:54px;border-radius:18px;display:flex;align-items:center;justify-content:center;background:rgba(255,255,255,.05);font-size:1.5rem}
.contact-card .info{text-align:left}
.contact-card .label{font-size:.78rem;color:var(--text-muted);text-transform:uppercase;letter-spacing:.12em}
.contact-card .value{margin-top:4px;color:var(--text-heading);font-weight:700}

/* === Chuyển động nhẹ === */
@keyframes floatCard{
  0%,100%{transform:translateY(0)}
  50%{transform:translateY(-12px)}
}
@keyframes floatGlow{
  0%,100%{transform:translate3d(0,0,0)}
  50%{transform:translate3d(0,18px,0)}
}
@keyframes floatWeaponA{
  0%,100%{transform:translate3d(0,0,0) rotate(-14deg)}
  50%{transform:translate3d(10px,-16px,0) rotate(-9deg)}
}
@keyframes floatWeaponB{
  0%,100%{transform:translate3d(0,0,0) rotate(24deg)}
  50%{transform:translate3d(-10px,12px,0) rotate(18deg)}
}
@keyframes floatWeaponC{
  0%,100%{transform:translate3d(0,0,0) rotate(-18deg)}
  50%{transform:translate3d(12px,-10px,0) rotate(-10deg)}
}
@keyframes floatWeaponD{
  0%,100%{transform:translate3d(0,0,0) rotate(10deg)}
  50%{transform:translate3d(-14px,-18px,0) rotate(4deg)}
}

/* === Hiển thị trên màn hình nhỏ === */
@media(max-width:1080px){
  .hero-grid,.earn-layout{grid-template-columns:1fr}
  .hero-stage{min-height:440px;max-width:620px;margin:0 auto}
  .hero-skins-stage{min-height:340px}
  .features-grid,.steps-grid,.contact-cards{grid-template-columns:repeat(2,minmax(0,1fr))}
  .signal-strip{grid-template-columns:1fr}
}
@media(max-width:768px){
  .container,.header{padding-left:16px;padding-right:16px}
  .header .container{height:auto;padding-top:14px;padding-bottom:14px;align-items:flex-start;gap:12px}
  .nav{gap:14px}
  .landing-main .section-shell{padding:74px 0}
  .landing-main .hero{padding:128px 0 56px}
  .hero-actions{flex-direction:column;align-items:stretch}
  .hero-actions .btn{width:100%}
  .hero-stage{min-height:450px}
  .hero-card-main{inset:24px 12px 18px 12px;padding:18px}
  .hero-skins-stage{min-height:300px}
  .hero-skin-bayonet{top:9%;left:18%;width:25%}
  .hero-skin-ak{top:17%;right:17%;width:39%}
  .hero-skin-m4a4{left:17%;bottom:33%;width:36%}
  .hero-skin-karambit{right:19%;bottom:35%;width:26%}
  .floating-card{max-width:220px;padding:14px}
  .features-grid,.steps-grid,.contact-cards{grid-template-columns:1fr}
  .contact-panel{flex-direction:column;align-items:flex-start}
  .contact-panel .btn{width:100%}
  .earn-showcase{min-height:420px;padding:24px 24px 20px}
  .earn-agent-stage{inset:18px 18px 66px}
  .earn-agent-stage img{width:min(100%,320px)}
}
@media(max-width:640px){
  .hero-stage{display:flex;flex-direction:column;gap:14px;min-height:auto}
  .hero-card-main,
  .floating-card{
    position:relative;
    inset:auto;
    left:auto;
    right:auto;
    top:auto;
    bottom:auto;
    width:100%;
    max-width:none;
    animation:none;
  }
  .hero-card-main{min-height:340px;padding:18px 16px 18px}
  .hero-skins-stage{height:auto;min-height:270px;padding-top:8px}
  .hero-skin{
    position:absolute;
    inset:auto;
    max-width:none;
  }
  .hero-skin::after{filter:blur(18px)}
  .hero-skin-bayonet{top:6%;left:14%;width:24%;transform:rotate(-22deg)}
  .hero-skin-ak{top:13%;right:13%;width:38%;transform:rotate(18deg)}
  .hero-skin-m4a4{left:14%;bottom:12%;width:34%;transform:rotate(-16deg)}
  .hero-skin-karambit{right:15%;bottom:15%;width:24%;transform:rotate(12deg)}
  .floating-card{padding:14px 16px}
}
@media(max-width:540px){
  .header .btn{width:100%}
  .hero-copy p,.section-subtitle,.section-subtitle-left,.signal-item p,.feature-card p,.step-card p,.glass-note,.contact-copy p{font-size:.96rem}
  .hero-stage{gap:12px}
  .hero-card-main{min-height:300px;padding:16px 14px 14px;border-radius:24px}
  .hero-card-badge{margin-bottom:12px;font-size:.74rem}
  .hero-skins-stage{min-height:240px;padding-top:4px}
  .hero-skin-bayonet{top:5%;left:12%;width:24%}
  .hero-skin-ak{top:14%;right:11%;width:40%}
  .hero-skin-m4a4{left:12%;bottom:11%;width:35%}
  .hero-skin-karambit{right:14%;bottom:15%;width:24%}
  .floating-card{padding:12px 14px;border-radius:18px}
  .floating-card strong{font-size:.88rem}
  .floating-kicker{margin-bottom:6px;font-size:.72rem}
  .hero-points span{width:100%;justify-content:flex-start}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation:none!important;transition:none!important}
}