:root {
    --primary: #405DE6;
    --primary-gradient: linear-gradient(135deg, #405DE6, #5851DB, #833AB4, #C13584, #E1306C, #FD1D1D);
    --bg-dark: #0f172a;
    --bg-light: #f8fafc;
    --text-main: #1e293b;
    --text-muted: #64748b;
    --card-bg: #ffffff;
    --border-color: #e2e8f0;
}
* { margin: 0; padding: 0; box-sizing: border-box; font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif; }
body { background: var(--bg-light); color: var(--text-main); line-height: 1.6; }
a { text-decoration: none; color: inherit; }
.nav { position: sticky; top: 0; background: rgba(255,255,255,0.9); backdrop-filter: blur(12px); z-index: 100; border-bottom: 1px solid var(--border-color); padding: 15px 5%; display: flex; justify-content: space-between; align-items: center; box-shadow: 0 2px 10px rgba(0,0,0,0.02); }
.nav-brand { font-size: 24px; font-weight: 800; background: var(--primary-gradient); -webkit-background-clip: text; color: transparent; letter-spacing: -0.5px; }
.nav-links a { margin-left: 24px; font-weight: 500; color: var(--text-main); transition: color 0.3s; }
.nav-links a:hover { color: #C13584; }
.container { max-width: 1200px; margin: 0 auto; padding: 40px 20px; }

/* Hero Section */
.hero { background: var(--bg-dark); color: #fff; padding: 100px 20px; text-align: center; position: relative; overflow: hidden; }
.hero::before { content: ""; position: absolute; top: -50%; left: -50%; width: 200%; height: 200%; background: radial-gradient(circle, rgba(193,53,132,0.15) 0%, rgba(15,23,42,0) 60%); z-index: 1; pointer-events: none; }
.hero-content { position: relative; z-index: 2; max-width: 800px; margin: 0 auto; }
.hero h1 { font-size: 48px; margin-bottom: 20px; font-weight: 700; line-height: 1.2; }
.hero p { font-size: 18px; color: #cbd5e1; margin-bottom: 40px; }
.btn-group { display: flex; justify-content: center; gap: 20px; flex-wrap: wrap; }
.btn { padding: 14px 36px; border-radius: 8px; font-weight: 600; text-align: center; display: inline-flex; align-items: center; justify-content: center; transition: all 0.3s ease; font-size: 16px; }
.btn-primary { background: var(--primary-gradient); color: white; border: none; box-shadow: 0 10px 20px rgba(193,53,132,0.2); }
.btn-primary:hover { box-shadow: 0 15px 25px rgba(193,53,132,0.4); transform: translateY(-2px); }
.btn-secondary { background: rgba(255,255,255,0.1); color: white; border: 1px solid rgba(255,255,255,0.2); backdrop-filter: blur(5px); }
.btn-secondary:hover { background: rgba(255,255,255,0.2); transform: translateY(-2px); }

/* Data Bar */
.data-bar { display: flex; justify-content: space-around; flex-wrap: wrap; padding: 50px 20px; background: #fff; border-bottom: 1px solid var(--border-color); }
.data-item { text-align: center; padding: 20px; flex: 1; min-width: 200px; }
.data-item h3 { font-size: 36px; font-weight: 800; color: #0f172a; margin-bottom: 8px; }
.data-item p { font-size: 15px; color: var(--text-muted); font-weight: 500; }

/* Sections */
.section { padding: 80px 20px; }
.section-light { background: #fff; }
.section-title { text-align: center; font-size: 36px; margin-bottom: 50px; font-weight: 700; color: var(--bg-dark); }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; align-items: center; }
.grid-3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 30px; }
@media (max-width: 768px) { .grid-2 { grid-template-columns: 1fr; } }

/* Cards */
.card { background: var(--card-bg); padding: 40px 30px; border-radius: 16px; box-shadow: 0 4px 6px rgba(0,0,0,0.02); border: 1px solid var(--border-color); transition: all 0.3s; }
.card:hover { transform: translateY(-5px); box-shadow: 0 20px 40px rgba(0,0,0,0.06); border-color: #cbd5e1; }
.card h3 { color: #1e293b; margin-bottom: 15px; font-size: 22px; font-weight: 700; display: flex; align-items: center; }
.card h3::before { content: ""; display: inline-block; width: 4px; height: 20px; background: var(--primary-gradient); margin-right: 10px; border-radius: 2px; }
.card p { color: var(--text-muted); line-height: 1.7; }

/* Device Mockups (Images) */
.device-img { width: 100%; height: auto; border-radius: 16px; box-shadow: 0 25px 50px rgba(0,0,0,0.15); transition: transform 0.3s; }
.device-img:hover { transform: scale(1.02); }

/* FAQ */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item { margin-bottom: 20px; background: var(--card-bg); padding: 25px; border-radius: 12px; border: 1px solid var(--border-color); }
.faq-item h3 { margin-bottom: 12px; font-size: 18px; color: #1e293b; font-weight: 600; }
.faq-item p { color: var(--text-muted); }

/* Guide Steps */
.step-card { text-align: center; padding: 30px 20px; }
.step-num { width: 60px; height: 60px; background: var(--primary-gradient); color: white; font-size: 24px; font-weight: bold; display: flex; align-items: center; justify-content: center; border-radius: 50%; margin: 0 auto 20px auto; box-shadow: 0 10px 20px rgba(193,53,132,0.3); }

/* Footer */
.footer { background: var(--bg-dark); color: #94a3b8; padding: 60px 20px 30px; text-align: center; }
.footer-links { margin-bottom: 30px; }
.footer-links a { margin: 0 20px; color: #e2e8f0; transition: color 0.3s; font-weight: 500; }
.footer-links a:hover { color: #C13584; }
.footer p { font-size: 14px; }