/* NovaTrace — Deep Indigo / Violet Professional */
:root{--pri:#4f46e5;--pri-d:#4338ca;--pri-l:#a5b4fc;--bg:#eef2ff;--card:#fff;--text:#1e1b4b}
*,::before,::after{box-sizing:border-box;margin:0;padding:0}
body{font-family:"Inter","PingFang SC","Microsoft YaHei",sans-serif;background:var(--bg);color:#1e293b;line-height:1.6}
.container{max-width:1200px;margin:0 auto;padding:0 1.5rem}

/* Nav — minimal underline style */
.nav{position:fixed;top:0;width:100%;z-index:50;background:rgba(255,255,255,.75);backdrop-filter:blur(16px);padding:.75rem 0;transition:all .3s}
.nav.scrolled{border-bottom:1px solid rgba(79,70,229,.08);box-shadow:0 1px 12px rgba(0,0,0,.03)}
.nav-inner{display:flex;align-items:center;justify-content:space-between}
.nav-brand{display:flex;align-items:center;gap:.5rem;text-decoration:none}
.nav-logo{width:36px;height:36px;border-radius:10px;background:#4f46e5;display:flex;align-items:center;justify-content:center;color:#fff;font-size:.9rem}
.nav-name{font-size:1.15rem;font-weight:800;color:#0f172a}
.nav-links{display:flex;gap:1.5rem;align-items:center}
.nav-links a{text-decoration:none;font-weight:600;font-size:.82rem;color:#475569;transition:color .2s;padding-bottom:4px;border-bottom:2px solid transparent}
.nav-links a:hover,.nav-links a.active{color:var(--pri);border-bottom-color:var(--pri)}
.nav-cta{padding:.5rem 1.2rem;background:var(--pri);color:#fff!important;border-radius:10px;font-weight:700!important;font-size:.8rem!important;border-bottom:none!important;transition:all .25s!important}
.nav-cta:hover{background:var(--pri-d);box-shadow:0 6px 20px rgba(79,70,229,.3);border-bottom:none!important}
.nav-toggle{display:none;background:none;border:none;color:#334155;font-size:1.3rem;cursor:pointer}

/* Hero — grid split with large typography */
.hero{padding:6rem 1.5rem 4rem;min-height:90vh;display:grid;grid-template-columns:1fr 1fr;gap:3rem;align-items:center}
.hero .hbadge{display:inline-flex;align-items:center;gap:.4rem;padding:.3rem .9rem;background:rgba(79,70,229,.06);border:1px solid rgba(79,70,229,.12);border-radius:10px;font-size:.75rem;font-weight:700;color:var(--pri);margin-bottom:1.2rem}
.hero h1{font-size:3.4rem;font-weight:900;color:#0f172a;line-height:1.08;margin-bottom:1rem}
.hero h1 .hl{background:linear-gradient(135deg,#4f46e5,#818cf8);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero p{font-size:1rem;color:#64748b;line-height:1.7;margin-bottom:2rem;max-width:420px}
.hero-btns{display:flex;gap:1rem}
.btn{display:inline-flex;align-items:center;gap:.4rem;padding:.85rem 1.8rem;border-radius:12px;font-weight:700;font-size:.9rem;text-decoration:none;transition:all .25s}
.btn-pri{background:var(--pri);color:#fff;box-shadow:0 8px 24px rgba(79,70,229,.3)}
.btn-pri:hover{background:var(--pri-d);transform:translateY(-2px)}
.btn-out{background:#fff;color:var(--text);border:2px solid#e2e8f0}
.btn-out:hover{border-color:var(--pri)}
.hero-visual{display:grid;grid-template-columns:repeat(2,1fr);gap:1rem}
.hv-card{background:#fff;border-radius:16px;padding:1.3rem;border:1px solid#e0e7ff;transition:all .3s;text-align:center}
.hv-card:hover{transform:translateY(-4px);box-shadow:0 8px 28px rgba(79,70,229,.08)}
.hv-card .hvn{font-size:1.5rem;font-weight:900;color:#0f172a}.hv-card .hvl{font-size:.7rem;color:#94a3b8;font-weight:600}

/* Section titles */
.sec-title{text-align:center;margin-bottom:3rem}
.sec-title h2{font-size:2.3rem;font-weight:900;color:#0f172a}.sec-title h2 .hl{color:var(--pri)}.sec-title p{color:#64748b}

/* Features */
.features{padding:5rem 1.5rem;background:#fff}
.feat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.5rem}
.feat-card{background:#fff;border-radius:20px;padding:2rem;border:1px solid#e0e7ff;transition:all .35s}
.feat-card:hover{box-shadow:0 16px 48px rgba(79,70,229,.06);transform:translateY(-5px)}
.feat-card .fi{font-size:1.6rem;color:var(--pri);margin-bottom:1rem}

/* Stats bar */
.stats-section{background:linear-gradient(135deg,#1e1b4b,#312e81,#3730a3);padding:4.5rem 1.5rem}
.stats-row{display:grid;grid-template-columns:repeat(4,1fr);gap:2rem;text-align:center}
.stat-item .sn{font-size:3rem;font-weight:900;color:#fff}.stat-item .sn .su{font-size:1rem;color:var(--pri-l)}.stat-item .sl{color:rgba(255,255,255,.45);font-weight:600;font-size:.8rem}

/* Testimonials */
.testimonials{padding:5rem 1.5rem;background:var(--bg)}
.testi-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.5rem}
.testi-card{background:#fff;border-radius:20px;padding:1.8rem;border:1px solid#e0e7ff;transition:all .3s}
.testi-card:hover{box-shadow:0 10px 32px rgba(79,70,229,.06)}
.testi-card .ts{color:#818cf8;font-size:.75rem;margin-bottom:.8rem}
.testi-card .tt{color:#475569;font-size:.85rem;line-height:1.6;margin-bottom:1rem}
.testi-card .ta{display:flex;align-items:center;gap:.6rem}
.testi-card .ta .tav{width:32px;height:32px;border-radius:50%;background:var(--pri);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:.7rem}

/* FAQ */
.faq{padding:5rem 1.5rem;background:#fff}
.faq-wrap{max-width:720px;margin:0 auto;display:flex;flex-direction:column;gap:.6rem}
.faq-item{border:1px solid#c7d2fe;border-radius:16px;overflow:hidden}
.faq-q{width:100%;background:#fff;border:none;padding:1.1rem 1.3rem;display:flex;justify-content:space-between;font-weight:700;font-size:.88rem;color:#0f172a;cursor:pointer;text-align:left}
.faq-item.open .faq-a{max-height:200px}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s}
.faq-a p{padding:0 1.3rem 1.1rem;color:#64748b;font-size:.83rem;line-height:1.6}

/* CTA */
.cta-section{padding:5rem 1.5rem;background:linear-gradient(135deg,#1e1b4b,#3730a3);text-align:center}
.cta-section h2{font-size:2.6rem;font-weight:900;color:#fff}.cta-section h2 .hl{color:var(--pri-l)}
.cta-section p{color:rgba(255,255,255,.5);font-size:.95rem;margin-bottom:2rem}
.cta-btns{display:flex;gap:1rem;justify-content:center}

/* Footer */
.footer{background:#0f172a;color:#94a3b8;padding:3rem 1.5rem 1.5rem}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:2.5rem;margin-bottom:2rem}
.footer h4{color:#fff;font-size:.8rem;margin-bottom:.6rem}
.footer a{color:#94a3b8;text-decoration:none;font-size:.76rem;display:block;margin-bottom:.3rem;transition:color .2s}
.footer a:hover{color:#fff}
.footer-bot{border-top:1px solid rgba(255,255,255,.08);padding-top:1.5rem;text-align:center;font-size:.75rem}

@media(max-width:768px){
  .nav-links{display:none}.nav-toggle{display:block}
  .hero{grid-template-columns:1fr}.hero h1{font-size:2.2rem}
  .hero-visual{grid-template-columns:repeat(2,1fr)}
  .feat-grid{grid-template-columns:1fr}.stats-row{grid-template-columns:repeat(2,1fr)}
  .testi-grid{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr 1fr}
}