:root {
    --grey-bg: #f8fafc;
    --grey-panel: #ffffff;
    --blue-dark: #334155;
    --blue-primary: #475569;
    --blue-accent: #3b82f6;
    --text-main: #1e293b;
    --text-sec: #64748b;
    --border-color: #e2e8f0;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    background: var(--grey-bg);
    color: var(--text-main);
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    line-height: 1.6;
}

a { text-decoration: none; color: inherit; transition: 0.2s; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* Header */
header {
    background: var(--grey-panel);
    border-bottom: 1px solid var(--border-color);
    position: sticky; top: 0; z-index: 100;
}
.h-inner { display: flex; justify-content: space-between; align-items: center; padding: 15px 0; }
.logo { font-size: 22px; font-weight: 800; color: var(--blue-dark); letter-spacing: -0.5px;}
.logo span { color: var(--blue-accent); }
.nav { display: flex; gap: 30px; }
.nav a { font-size: 14px; font-weight: 500; color: var(--text-sec); }
.nav a:hover { color: var(--blue-accent); }
.btn-solid {
    background: var(--blue-accent); color: #fff; padding: 10px 20px; border-radius: 6px;
    font-size: 14px; font-weight: 600; box-shadow: 0 2px 4px rgba(59,130,246,0.2);
}
.btn-solid:hover { background: #2563eb; }

/* Hero */
.hero { padding: 80px 0; background: var(--grey-panel); border-bottom: 1px solid var(--border-color); }
.hero-content { max-width: 800px; margin: 0 auto; text-align: center; }
.hero h1 { font-size: 48px; font-weight: 800; color: var(--blue-dark); margin-bottom: 20px; line-height: 1.2; letter-spacing: -1px;}
.hero p { font-size: 18px; color: var(--text-sec); margin-bottom: 40px; }
.hero-actions { display: flex; justify-content: center; gap: 15px; }
.btn-outline { border: 1px solid var(--border-color); color: var(--blue-dark); padding: 10px 20px; border-radius: 6px; font-weight: 600; font-size: 14px;}
.btn-outline:hover { background: var(--grey-bg); }

/* Trust */
.trust { display: flex; justify-content: center; gap: 40px; padding: 20px 0; background: var(--grey-bg); border-bottom: 1px solid var(--border-color);}
.trust span { font-size: 13px; font-weight: 500; color: var(--text-sec); display: flex; align-items: center; gap: 8px;}
.trust span::before { content: ''; display: inline-block; width: 6px; height: 6px; border-radius: 50%; background: var(--blue-accent); }

/* Stats */
.stats { padding: 60px 0; display: flex; justify-content: space-between; }
.s-box { flex: 1; text-align: center; border-right: 1px solid var(--border-color); }
.s-box:last-child { border: none; }
.s-num { font-size: 36px; font-weight: 800; color: var(--blue-dark); }
.s-lbl { font-size: 13px; color: var(--text-sec); font-weight: 500; text-transform: uppercase; margin-top: 5px;}

/* Section Title */
.sec-title { font-size: 28px; font-weight: 700; color: var(--blue-dark); margin-bottom: 40px; text-align: center; letter-spacing: -0.5px;}

/* Features */
.feat-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 25px; margin-bottom: 80px;}
.f-card { background: var(--grey-panel); padding: 40px 30px; border-radius: 8px; border: 1px solid var(--border-color); transition: 0.2s;}
.f-card:hover { border-color: var(--blue-accent); box-shadow: 0 10px 25px rgba(0,0,0,0.05); transform: translateY(-3px);}
.f-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 15px; color: var(--blue-dark); }
.f-card p { font-size: 14px; color: var(--text-sec); line-height: 1.6; }

/* Nodes Layout */
.node-map { background: var(--grey-panel); border: 1px solid var(--border-color); border-radius: 8px; padding: 50px; margin-bottom: 80px;}
.n-grid { display: flex; justify-content: space-between; align-items: center; }
.n-item { text-align: center; }
.n-loc { font-size: 18px; font-weight: 700; color: var(--blue-dark); margin-bottom: 5px; }
.n-bw { font-size: 12px; font-weight: 600; color: var(--blue-accent); background: rgba(59,130,246,0.1); padding: 4px 10px; border-radius: 20px;}

/* Reviews */
.rev-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 25px; margin-bottom: 80px;}
.r-card { background: var(--grey-panel); padding: 30px; border-radius: 8px; border: 1px solid var(--border-color); }
.r-stars { color: #f59e0b; font-size: 14px; margin-bottom: 15px; letter-spacing: 2px;}
.r-txt { font-size: 14px; color: var(--text-sec); margin-bottom: 20px; }
.r-user { font-size: 13px; font-weight: 700; color: var(--blue-dark); }

/* FAQ */
.faq-sec { max-width: 800px; margin: 0 auto 80px; }
.faq-box { background: var(--grey-panel); border: 1px solid var(--border-color); border-radius: 8px; margin-bottom: 15px; overflow: hidden;}
.faq-q { padding: 20px; font-size: 15px; font-weight: 600; color: var(--blue-dark); cursor: pointer; display: flex; justify-content: space-between;}
.faq-a { padding: 0 20px 20px; font-size: 14px; color: var(--text-sec); display: none; }

/* Footer */
footer { background: var(--grey-panel); border-top: 1px solid var(--border-color); padding: 40px 0; text-align: center;}
footer p { font-size: 14px; color: var(--text-sec); }

@media (max-width: 800px) {
    .nav { display: none; }
    .hero h1 { font-size: 36px; }
    .stats { flex-direction: column; gap: 30px; }
    .s-box { border-right: none; border-bottom: 1px solid var(--border-color); padding-bottom: 30px;}
    .feat-grid, .rev-list { grid-template-columns: 1fr; }
    .n-grid { flex-wrap: wrap; gap: 20px; justify-content: center; }
}