/* MetaPulse — Slate/Sky-Blue Data Intelligence */
:root{--pri:#0284c7;--pri-d:#0369a1;--pri-l:#38bdf8;--bg:#f0f9ff;--card:#fff;--text:#0c4a6e}
*,::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 */
.nav{position:fixed;top:0;width:100%;z-index:50;padding:1rem 0;transition:all .3s}
.nav.scrolled{background:rgba(255,255,255,.85);backdrop-filter:blur(20px);box-shadow:0 1px 0 rgba(0,0,0,.04)}
.nav-inner{display:flex;align-items:center;justify-content:space-between}
.nav-brand{display:flex;align-items:center;gap:.6rem;text-decoration:none}
.nav-logo{width:40px;height:40px;border-radius:14px;background:linear-gradient(135deg,#0284c7,#0ea5e9);display:flex;align-items:center;justify-content:center;color:#fff;font-size:1.1rem;box-shadow:0 4px 12px rgba(2,132,199,.3)}
.nav-name{font-size:1.25rem;font-weight:800;color:#0f172a}
.nav-links{display:flex;gap:1.8rem;align-items:center}
.nav-links a{text-decoration:none;font-weight:600;font-size:.83rem;color:#475569;transition:color .2s}
.nav-links a:hover{color:var(--pri)}
.nav-cta{padding:.55rem 1.3rem;background:var(--pri);color:#fff!important;border-radius:14px;font-weight:700!important;transition:all .25s!important;box-shadow:0 4px 14px rgba(2,132,199,.25)}
.nav-cta:hover{background:var(--pri-d);box-shadow:0 6px 22px rgba(2,132,199,.35)}
.nav-toggle{display:none;background:none;border:none;color:#334155;font-size:1.3rem;cursor:pointer}

/* Hero */
.hero{padding:6rem 1.5rem 4rem;display:flex;align-items:center;min-height:90vh}
.hero-inner{display:grid;grid-template-columns:1fr 1fr;gap:3rem;align-items:center}
.hero-badge{display:inline-flex;align-items:center;gap:.4rem;padding:.35rem 1rem;background:rgba(2,132,199,.08);border:1px solid rgba(2,132,199,.15);border-radius:14px;font-size:.78rem;font-weight:700;color:var(--pri);margin-bottom:1.2rem}
.hero h1{font-size:3.2rem;font-weight:900;color:#0f172a;line-height:1.12;margin-bottom:1rem}
.hero h1 .hl{background:linear-gradient(135deg,var(--pri),#0ea5e9);-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;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:.5rem;padding:.85rem 1.8rem;border-radius:14px;font-weight:700;font-size:.92rem;text-decoration:none;transition:all .25s}
.btn-pri{background:var(--pri);color:#fff;box-shadow:0 8px 24px rgba(2,132,199,.3)}
.btn-pri:hover{background:var(--pri-d);transform:translateY(-2px);box-shadow:0 14px 36px rgba(2,132,199,.4)}
.btn-out{background:#fff;color:var(--text);border:2px solid#e2e8f0}
.btn-out:hover{border-color:var(--pri);color:var(--pri)}
.pulse-ring{position:relative;width:320px;height:320px;margin:0 auto}
.pulse-ring::before,.pulse-ring::after{content:'';position:absolute;inset:0;border-radius:50%;border:2px solid rgba(2,132,199,.2);animation:pr 3s ease-out infinite}
.pulse-ring::after{animation-delay:1s}
@keyframes pr{0%{transform:scale(.8);opacity:1}100%{transform:scale(1.4);opacity:0}}
.pulse-center{position:absolute;inset:20px;border-radius:50%;background:linear-gradient(135deg,#0284c7,#0ea5e9,#38bdf8);display:flex;align-items:center;justify-content:center;color:#fff;font-size:3rem;box-shadow:0 16px 48px rgba(2,132,199,.4)}

/* Section titles */
.sec-title{text-align:center;margin-bottom:3rem}
.sec-title h2{font-size:2.4rem;font-weight:900;color:#0f172a;margin-bottom:.5rem}
.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{border-radius:20px;padding:2rem;background:#fff;border:1px solid#e0f2fe;transition:all .35s;position:relative;overflow:hidden}
.feat-card::after{content:'';position:absolute;bottom:0;left:50%;transform:translateX(-50%);width:0;height:3px;background:var(--pri);transition:width .35s}
.feat-card:hover::after{width:60%}
.feat-card:hover{transform:translateY(-6px);box-shadow:0 18px 48px rgba(2,132,199,.08)}
.feat-card .fi{font-size:1.8rem;color:var(--pri);margin-bottom:1rem}

/* Stats */
.stats-section{background:linear-gradient(135deg,#0c4a6e,#075985);padding:4.5rem 1.5rem}
.stats-row{display:grid;grid-template-columns:repeat(4,1fr);gap:2rem;text-align:center}
.stat-item .sv{font-size:3rem;font-weight:900;color:#fff}.stat-item .sv .su{font-size:1.1rem;color:var(--pri-l)}.stat-item .sl{color:rgba(255,255,255,.5);font-weight:600;font-size:.82rem}

/* 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#e0f2fe;transition:all .3s}
.testi-card:hover{box-shadow:0 12px 36px rgba(2,132,199,.08)}
.testi-card .ts{color:#0ea5e9;font-size:.75rem;margin-bottom:.8rem}
.testi-card .tt{color:#475569;font-size:.87rem;line-height:1.65;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:linear-gradient(135deg,var(--pri),#0ea5e9);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:.75rem}

/* 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#e2e8f0;border-radius:16px;overflow:hidden}
.faq-q{width:100%;background:#fff;border:none;padding:1.1rem 1.4rem;display:flex;justify-content:space-between;align-items:center;font-weight:700;font-size:.9rem;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 ease}
.faq-a p{padding:0 1.4rem 1.1rem;color:#64748b;font-size:.85rem;line-height:1.65}

/* CTA */
.cta-section{padding:5rem 1.5rem;background:linear-gradient(135deg,#0c4a6e,var(--pri-d));text-align:center}
.cta-section h2{font-size:2.8rem;font-weight:900;color:#fff;margin-bottom:1rem}
.cta-section h2 .hl{color:var(--pri-l)}
.cta-section p{color:rgba(255,255,255,.55);font-size:1rem;margin-bottom:2rem}
.cta-btns{display:flex;gap:1rem;justify-content:center;flex-wrap:wrap}

/* 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:.82rem;font-weight:700;margin-bottom:.7rem}
.footer a{color:#94a3b8;text-decoration:none;font-size:.78rem;display:block;margin-bottom:.35rem;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:.78rem}

@media(max-width:768px){
  .nav-links{display:none}.nav-toggle{display:block}
  .hero-inner{grid-template-columns:1fr}.hero h1{font-size:2.2rem}
  .pulse-ring{width:240px;height:240px}
  .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}
}