*{margin:0;padding:0;box-sizing:border-box}
:root{
--primary:#00e5a0;
--primary-dark:#00b882;
--bg:#0a0e17;
--bg-card:#111827;
--bg-card2:#1a2236;
--text:#e5e7eb;
--text-muted:#9ca3af;
--border:#1f2937;
--accent:#f59e0b;
}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans SC",sans-serif;background:var(--bg);color:var(--text);line-height:1.6;overflow-x:hidden}
a{color:var(--primary);text-decoration:none}
a:hover{color:var(--primary-dark)}
.container{max-width:1200px;margin:0 auto;padding:0 20px}

/* ===== TOP NAV ===== */
.nav{position:fixed;top:0;left:0;right:0;z-index:1000;background:rgba(10,14,23,.92);backdrop-filter:blur(12px);border-bottom:1px solid var(--border)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:64px}
.nav-logo{font-size:1.3rem;font-weight:800;color:var(--primary);letter-spacing:1px}
.nav-logo span{color:var(--text)}
.nav-links{display:flex;gap:28px;list-style:none}
.nav-links a{color:var(--text-muted);font-size:.9rem;transition:.2s}
.nav-links a:hover{color:var(--primary)}
.nav-toggle{display:none;flex-direction:column;gap:5px;cursor:pointer;background:none;border:none;padding:4px}
.nav-toggle span{width:24px;height:2px;background:var(--text);transition:.3s}
#menu-check{display:none}
#menu-check:checked~.nav-links{display:flex;flex-direction:column;position:absolute;top:64px;left:0;right:0;background:rgba(10,14,23,.97);padding:20px;gap:16px;border-bottom:1px solid var(--border)}

/* ===== HERO ===== */
.hero{padding:140px 0 80px;text-align:center;position:relative;overflow:hidden}
.hero::before{content:"";position:absolute;top:-50%;left:-50%;width:200%;height:200%;background:radial-gradient(ellipse at center,rgba(0,229,160,.08) 0%,transparent 60%);pointer-events:none}
.hero h1{font-size:clamp(1.8rem,5vw,3.2rem);font-weight:900;line-height:1.2;margin-bottom:16px;background:linear-gradient(135deg,#fff 0%,var(--primary) 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero p{font-size:clamp(1rem,2.5vw,1.2rem);color:var(--text-muted);max-width:600px;margin:0 auto 32px}
.btn-download{display:inline-flex;align-items:center;gap:10px;background:linear-gradient(135deg,var(--primary),var(--primary-dark));color:#000;font-weight:700;font-size:1.1rem;padding:16px 40px;border-radius:12px;border:none;cursor:pointer;transition:.3s;text-decoration:none;box-shadow:0 4px 24px rgba(0,229,160,.3)}
.btn-download:hover{transform:translateY(-2px);box-shadow:0 8px 32px rgba(0,229,160,.4)}
.btn-download svg{width:22px;height:22px;fill:#000}
.hero-badges{display:flex;justify-content:center;gap:12px;margin-top:24px;flex-wrap:wrap}
.badge{background:var(--bg-card);border:1px solid var(--border);padding:6px 14px;border-radius:20px;font-size:.8rem;color:var(--text-muted)}
.badge strong{color:var(--primary)}

/* ===== SECTION COMMON ===== */
section{padding:80px 0}
.section-title{text-align:center;margin-bottom:48px}
.section-title h2{font-size:clamp(1.5rem,4vw,2.2rem);font-weight:800;margin-bottom:12px}
.section-title h2 span{color:var(--primary)}
.section-title p{color:var(--text-muted);max-width:500px;margin:0 auto}

/* ===== FEATURE CARDS ===== */
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:24px}
.card{background:var(--bg-card);border:1px solid var(--border);border-radius:16px;padding:32px 24px;transition:.3s;position:relative;overflow:hidden}
.card:hover{border-color:var(--primary);transform:translateY(-4px)}
.card::before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--primary),transparent);opacity:0;transition:.3s}
.card:hover::before{opacity:1}
.card-icon{width:48px;height:48px;background:rgba(0,229,160,.1);border-radius:12px;display:flex;align-items:center;justify-content:center;margin-bottom:16px;font-size:1.5rem}
.card h3{font-size:1.15rem;margin-bottom:8px;font-weight:700}
.card p{color:var(--text-muted);font-size:.9rem}

/* ===== FEATURE DETAIL ===== */
.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:32px}
.feature-item{display:flex;gap:16px;align-items:flex-start}
.feature-num{min-width:36px;height:36px;background:linear-gradient(135deg,var(--primary),var(--primary-dark));color:#000;font-weight:800;border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:.9rem}
.feature-item h4{margin-bottom:4px;font-size:1rem}
.feature-item p{color:var(--text-muted);font-size:.88rem}

/* ===== TUTORIAL ===== */
.tutorial{background:var(--bg-card)}
.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:24px}
.step{background:var(--bg-card2);border:1px solid var(--border);border-radius:12px;padding:24px;position:relative}
.step-num{position:absolute;top:-12px;left:20px;background:var(--primary);color:#000;width:28px;height:28px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:.85rem}
.step h4{margin-bottom:8px;font-size:1rem}
.step p{color:var(--text-muted);font-size:.85rem}

/* ===== FAQ ===== */
.faq-list{max-width:760px;margin:0 auto}
.faq-item{background:var(--bg-card);border:1px solid var(--border);border-radius:12px;margin-bottom:12px;overflow:hidden}
.faq-q{padding:18px 24px;cursor:pointer;font-weight:600;display:flex;justify-content:space-between;align-items:center;font-size:.95rem}
.faq-q::after{content:"+";font-size:1.3rem;color:var(--primary);transition:.3s}
.faq-item:target .faq-q::after{content:"?";transform:rotate(180deg)}
.faq-item:target .faq-a{max-height:200px;padding:0 24px 18px}
.faq-a{max-height:0;overflow:hidden;transition:.4s;color:var(--text-muted);font-size:.9rem}

/* ===== FOOTER ===== */
.footer{background:var(--bg-card);border-top:1px solid var(--border);padding:48px 0 24px}
.footer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:32px;margin-bottom:32px}
.footer-col h4{color:var(--primary);margin-bottom:12px;font-size:.95rem}
.footer-col p,.footer-col a{color:var(--text-muted);font-size:.85rem;display:block;margin-bottom:6px}
.footer-col a:hover{color:var(--primary)}
.footer-bottom{text-align:center;padding-top:24px;border-top:1px solid var(--border);color:var(--text-muted);font-size:.8rem}
.footer-bottom a{color:var(--primary)}

/* ===== RESPONSIVE ===== */
@media(max-width:768px){
.nav-toggle{display:flex}
.nav-links{display:none}
.hero{padding:120px 0 60px}
section{padding:60px 0}
.card{padding:24px 18px}
}
@media(max-width:480px){
.btn-download{padding:14px 28px;font-size:1rem}
}