/* GraphX — Deep Violet / Purple Data Platform */
:root{--pri:#7c3aed;--pri-d:#6d28d9;--pri-l:#a78bfa;--bg:#f5f3ff;--card:#fff;--text:#2e1065}
*,::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 — left sidebar style on desktop */
.nav{position:fixed;top:0;width:100%;z-index:50;background:rgba(255,255,255,.75);backdrop-filter:blur(16px);border-bottom:1px solid rgba(124,58,237,.08);padding:.8rem 0;transition:all .3s}
.nav.scrolled{box-shadow:0 2px 20px rgba(124,58,237,.08)}
.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:38px;height:38px;border-radius:10px;background:linear-gradient(135deg,#7c3aed,#a855f7);display:flex;align-items:center;justify-content:center;color:#fff;font-size:1rem}
.nav-name{font-size:1.2rem;font-weight:800;color:#0f172a}
.nav-links{display:flex;gap:1.6rem;align-items:center}
.nav-links a{text-decoration:none;font-weight:600;font-size:.83rem;color:#475569;transition:color .2s}
.nav-links a:hover,.nav-links a.active{color:var(--pri)}
.nav-cta{padding:.55rem 1.3rem;background:var(--pri);color:#fff!important;border-radius:10px;font-weight:700!important;font-size:.82rem!important;transition:all .25s!important}
.nav-cta:hover{background:var(--pri-d);box-shadow:0 6px 20px rgba(124,58,237,.3)}
.nav-toggle{display:none;background:none;border:none;color:#334155;font-size:1.3rem;cursor:pointer}

/* Hero — split with left content + right dashboard preview */
.hero{padding:6rem 1.5rem 4rem;display:grid;grid-template-columns:1fr 1fr;gap:3rem;align-items:center;min-height:90vh}
.hero-badge{display:inline-flex;align-items:center;gap:.4rem;padding:.35rem 1rem;background:rgba(124,58,237,.08);border:1px solid rgba(124,58,237,.15);border-radius:10px;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),#a855f7);-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:440px}
.hero-btns{display:flex;gap:1rem;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:.4rem;padding:.85rem 1.8rem;border-radius:12px;font-weight:700;font-size:.92rem;text-decoration:none;transition:all .25s;cursor:pointer}
.btn-pri{background:var(--pri);color:#fff;box-shadow:0 8px 24px rgba(124,58,237,.3)}
.btn-pri:hover{background:var(--pri-d);transform:translateY(-2px);box-shadow:0 14px 36px rgba(124,58,237,.4)}
.btn-out{background:#fff;color:var(--text);border:2px solid#e2e8f0}
.btn-out:hover{border-color:var(--pri);color:var(--pri)}
.dashboard-preview{background:var(--card);border-radius:24px;padding:1.5rem;box-shadow:0 20px 60px rgba(124,58,237,.1);border:1px solid rgba(124,58,237,.08)}
.dp-title{font-size:.75rem;font-weight:700;color:#64748b;text-transform:uppercase;letter-spacing:.08em;margin-bottom:1rem}
.dp-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:.6rem;margin-bottom:1rem}
.dp-cell{padding:.7rem;background:#f8f6ff;border-radius:10px;text-align:center;transition:all .3s}
.dp-cell:hover{background:rgba(124,58,237,.1)}
.dp-cell .dpc-val{font-size:1.3rem;font-weight:900;color:#0f172a}
.dp-cell .dpc-lbl{font-size:.65rem;color:#94a3b8;font-weight:600}
.dp-chart{display:flex;align-items:flex-end;gap:6px;height:60px}
.dp-bar{flex:1;background:linear-gradient(180deg,var(--pri-l),var(--pri));border-radius:6px 6px 0 0;transition:all .3s}

/* 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 — horizontal card rows */
.features{padding:5rem 1.5rem;background:#fff}
.feat-list{display:flex;flex-direction:column;gap:1rem}
.feat-row{display:flex;align-items:center;gap:2rem;background:#fafafa;border-radius:20px;padding:1.8rem 2rem;border:1px solid transparent;transition:all .3s;cursor:default}
.feat-row:hover{background:#fff;border-color:rgba(124,58,237,.15);box-shadow:0 8px 32px rgba(124,58,237,.06);transform:translateX(6px)}
.feat-row .fr-icon{min-width:56px;height:56px;border-radius:16px;background:rgba(124,58,237,.08);display:flex;align-items:center;justify-content:center;color:var(--pri);font-size:1.5rem;transition:all .3s}
.feat-row:hover .fr-icon{background:var(--pri);color:#fff}
.feat-row .fr-text h3{font-size:1.1rem;font-weight:700;color:#0f172a;margin-bottom:.3rem}
.feat-row .fr-text p{font-size:.88rem;color:#64748b;line-height:1.55}

/* Stats */
.stats-section{background:linear-gradient(135deg,#2e1065,#4c1d95,#5b21b6);padding:4.5rem 1.5rem;position:relative;overflow:hidden}
.stats-section::after{content:'';position:absolute;inset:0;background:radial-gradient(circle at 30% 50%,rgba(167,139,250,.1) 0%,transparent 60%)}
.stats-row{position:relative;z-index:1;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#ede9fe;transition:all .3s;position:relative}
.testi-card::before{content:'\201C';position:absolute;top:.5rem;right:1.2rem;font-size:3rem;color:rgba(124,58,237,.1);line-height:1}
.testi-card:hover{box-shadow:0 14px 40px rgba(124,58,237,.08);transform:translateY(-4px)}
.testi-card .ts{color:#f59e0b;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:34px;height:34px;border-radius:50%;background:linear-gradient(135deg,var(--pri),#a855f7);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-q i{color:var(--pri);transition:transform .3s}
.faq-item.open .faq-q i{transform:rotate(180deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease}
.faq-item.open .faq-a{max-height:200px}
.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,#2e1065,var(--pri-d));text-align:center;position:relative;overflow:hidden}
.cta-section h2{font-size:2.8rem;font-weight:900;color:#fff;position:relative;z-index:1;margin-bottom:1rem}
.cta-section h2 .hl{color:var(--pri-l)}
.cta-section p{color:rgba(255,255,255,.55);font-size:1rem;position:relative;z-index:1;margin-bottom:2rem}
.cta-btns{display:flex;gap:1rem;justify-content:center;flex-wrap:wrap;position:relative;z-index:1}

/* 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}

/* About page */
.about-hero{min-height:50vh;display:flex;align-items:center;justify-content:center;text-align:center;padding:6rem 1.5rem 3rem;background:linear-gradient(180deg,var(--bg) 0%,#fff 100%)}
.about-hero h1{font-size:3rem;font-weight:900;color:#0f172a}.about-hero h1 .hl{color:var(--pri)}
.about-section{padding:3.5rem 1.5rem}.about-section.alt{background:#fff}
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:3rem;align-items:center}
.about-card{background:linear-gradient(135deg,var(--pri),#a855f7);border-radius:24px;padding:3rem 2rem;color:#fff;text-align:center}
.about-card .ac-big{font-size:3.5rem;font-weight:900}.about-card .ac-sub{opacity:.75;font-weight:600}
.timeline{display:flex;flex-direction:column;gap:1.5rem;padding-left:2rem;border-left:2px solid rgba(124,58,237,.2)}
.timeline-item{position:relative}
.timeline-item::before{content:'';position:absolute;left:-2.45rem;top:.4rem;width:10px;height:10px;border-radius:50%;background:var(--pri)}
.timeline-item .ti-year{font-weight:900;color:var(--pri);font-size:.9rem}.timeline-item .ti-text{color:#64748b;font-size:.88rem}

@media(max-width:768px){
  .nav-links{display:none}.nav-toggle{display:block}
  .hero{grid-template-columns:1fr}.hero h1{font-size:2.2rem}
  .feat-row{flex-direction:column;text-align:center;gap:1rem}
  .stats-row{grid-template-columns:repeat(2,1fr)}.testi-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}.about-grid{grid-template-columns:1fr}
}