:root {
    --cloud-bg: #f0f8ff;
    --cloud-text: #334155;
    --cloud-primary: #3b82f6;
    --cloud-secondary: #0ea5e9;
    --cloud-accent: #e0f2fe;
    --font-cloud: 'Nunito', 'Segoe UI', sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    background-color: var(--cloud-bg); color: var(--cloud-text);
    font-family: var(--font-cloud);
    line-height: 1.6;
    background-image: radial-gradient(circle at 50% 0%, #ffffff 0%, transparent 70%);
    min-height: 100vh;
}
a { text-decoration: none; color: inherit; }

.cloud-container { max-width: 1100px; margin: 0 auto; padding: 20px; position: relative;}

/* Header */
.cloud-header {
    display: flex; justify-content: space-between; align-items: center;
    padding: 20px 40px; background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px); border-radius: 100px;
    box-shadow: 0 4px 20px rgba(59, 130, 246, 0.1);
    margin-bottom: 60px; margin-top: 20px;
}
.cloud-brand {
    font-size: 24px; font-weight: 800; color: var(--cloud-primary);
    display: flex; align-items: center; gap: 10px;
}
.cloud-brand::before { content: '☁️'; font-size: 28px; }
.cloud-nav { display: flex; gap: 30px; }
.cloud-nav a {
    font-size: 15px; font-weight: 600; color: #64748b;
    transition: all 0.3s; padding: 8px 16px; border-radius: 20px;
}
.cloud-nav a:hover, .cloud-nav a.active { background: var(--cloud-accent); color: var(--cloud-primary); }

/* Hero */
.cloud-hero {
    text-align: center; padding: 80px 20px; margin-bottom: 80px;
    position: relative;
}
.cloud-hero::before {
    content: ''; position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%);
    width: 600px; height: 400px; background: radial-gradient(ellipse at center, rgba(14, 165, 233, 0.15) 0%, transparent 70%);
    z-index: -1; border-radius: 50%;
}
.cloud-hero h1 {
    font-size: 56px; font-weight: 900; margin-bottom: 20px;
    background: linear-gradient(135deg, var(--cloud-primary), var(--cloud-secondary));
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    letter-spacing: -1px;
}
.cloud-hero p { font-size: 20px; color: #64748b; margin-bottom: 40px; max-width: 700px; margin-left: auto; margin-right: auto;}
.btn-cloud {
    display: inline-block; padding: 16px 40px; font-size: 18px; font-weight: 700;
    color: #fff; background: var(--cloud-primary); border-radius: 50px;
    transition: all 0.3s; box-shadow: 0 10px 25px rgba(59, 130, 246, 0.4); margin: 0 10px;
}
.btn-cloud:hover { transform: translateY(-5px); box-shadow: 0 15px 35px rgba(59, 130, 246, 0.5); background: #2563eb;}
.btn-cloud-alt {
    display: inline-block; padding: 16px 40px; font-size: 18px; font-weight: 700;
    color: var(--cloud-primary); background: #fff; border: 2px solid var(--cloud-accent);
    border-radius: 50px; transition: all 0.3s; margin: 0 10px;
}
.btn-cloud-alt:hover { background: var(--cloud-accent); border-color: var(--cloud-primary);}

/* Stats */
.cloud-stats {
    display: flex; justify-content: center; gap: 30px; margin-bottom: 80px;
}
.cs-item {
    background: #fff; padding: 30px 40px; border-radius: 24px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.03); text-align: center;
    border: 1px solid rgba(255,255,255,0.5);
}
.cs-val { font-size: 42px; font-weight: 900; color: var(--cloud-secondary); margin-bottom: 5px;}
.cs-lbl { font-size: 14px; font-weight: 700; color: #94a3b8; text-transform: uppercase; letter-spacing: 1px;}

/* Grid */
.cloud-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; margin-bottom: 80px;}
.cg-card {
    background: rgba(255,255,255,0.7); backdrop-filter: blur(10px);
    padding: 40px 30px; border-radius: 24px; text-align: center;
    box-shadow: 0 10px 30px rgba(0,0,0,0.03); border: 1px solid rgba(255,255,255,0.5);
    transition: transform 0.3s;
}
.cg-card:hover { transform: translateY(-10px); }
.cg-icon {
    width: 70px; height: 70px; margin: 0 auto 20px; background: var(--cloud-accent);
    border-radius: 20px; display: flex; align-items: center; justify-content: center;
    font-size: 32px; color: var(--cloud-primary);
}
.cg-card h3 { font-size: 22px; font-weight: 800; margin-bottom: 15px; color: var(--cloud-text);}
.cg-card p { font-size: 15px; color: #64748b; line-height: 1.6;}

/* Nodes */
.cloud-nodes { margin-bottom: 80px; text-align: center;}
.cloud-nodes h2 { font-size: 32px; font-weight: 800; margin-bottom: 40px; color: var(--cloud-text);}
.node-cloud-wrap { display: flex; flex-wrap: wrap; justify-content: center; gap: 15px;}
.n-cloud {
    padding: 12px 25px; background: #fff; border-radius: 50px;
    font-size: 15px; font-weight: 700; color: var(--cloud-text);
    box-shadow: 0 4px 15px rgba(0,0,0,0.03); border: 1px solid var(--cloud-accent);
}
.n-cloud span { color: var(--cloud-secondary); margin-left: 10px; font-weight: 600;}

/* FAQ */
.cloud-faq { margin-bottom: 80px; max-width: 800px; margin-left: auto; margin-right: auto;}
.cloud-faq h2 { font-size: 32px; font-weight: 800; margin-bottom: 40px; text-align: center; color: var(--cloud-text);}
.faq-item {
    margin-bottom: 20px; background: #fff; padding: 30px;
    border-radius: 20px; box-shadow: 0 10px 30px rgba(0,0,0,0.03);
}
.fq-q { font-size: 18px; font-weight: 800; color: var(--cloud-primary); margin-bottom: 15px;}
.fq-a { font-size: 16px; color: #64748b; line-height: 1.6;}

footer { text-align: center; padding: 40px 0; font-size: 14px; font-weight: 600; color: #94a3b8;}

@media (max-width: 900px) {
    .cloud-header { flex-direction: column; gap: 20px; border-radius: 20px; padding: 20px;}
    .cloud-hero h1 { font-size: 42px; }
    .cloud-stats { flex-direction: column; gap: 20px; }
    .cloud-grid { grid-template-columns: 1fr; }
    .btn-cloud, .btn-cloud-alt { display: block; margin: 15px auto; width: 80%;}
}