:root {
    --arc-bg: #0a0e17;
    --arc-text: #e2e8f0;
    --arc-primary: #00e5ff;
    --arc-secondary: #ff0055;
    --arc-card: #131a28;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    background-color: var(--arc-bg); color: var(--arc-text);
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    line-height: 1.6; overflow-x: hidden;
}
a { text-decoration: none; color: inherit; }

.arc-container { max-width: 1200px; margin: 0 auto; padding: 20px;}

/* Header */
.arc-header {
    display: flex; justify-content: space-between; align-items: center;
    padding: 25px 0; margin-bottom: 60px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}
.arc-brand {
    font-size: 26px; font-weight: 900;
    background: linear-gradient(90deg, var(--arc-primary), var(--arc-secondary));
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    letter-spacing: -1px;
}
.arc-nav { display: flex; gap: 35px; }
.arc-nav a {
    font-size: 14px; font-weight: 500; color: #8b9bb4;
    transition: color 0.3s; text-transform: uppercase; letter-spacing: 1px;
}
.arc-nav a:hover, .arc-nav a.active { color: var(--arc-primary); }

/* Hero */
.arc-hero {
    display: flex; align-items: center; justify-content: space-between;
    margin-bottom: 100px; position: relative;
}
.arc-hero::before {
    content: ''; position: absolute; top: -100px; right: -100px;
    width: 500px; height: 500px; border-radius: 50%;
    background: radial-gradient(circle, rgba(0, 229, 255, 0.1) 0%, transparent 70%);
    z-index: -1;
}
.ah-content { flex: 1; padding-right: 60px;}
.ah-content h1 {
    font-size: 52px; font-weight: 800; margin-bottom: 25px; line-height: 1.1;
    letter-spacing: -1px; color: #fff;
}
.ah-content p { font-size: 18px; color: #8b9bb4; margin-bottom: 45px; max-width: 500px;}
.ah-visual { flex: 1; display: flex; justify-content: center;}
.energy-arc {
    width: 300px; height: 300px; position: relative;
}
.energy-arc::before, .energy-arc::after {
    content: ''; position: absolute; top: 0; left: 0; right: 0; bottom: 0;
    border-radius: 50%; border: 2px solid transparent;
}
.energy-arc::before {
    border-top-color: var(--arc-primary); border-right-color: var(--arc-primary);
    animation: spinArc 4s linear infinite;
}
.energy-arc::after {
    border-bottom-color: var(--arc-secondary); border-left-color: var(--arc-secondary);
    animation: spinArc 3s linear infinite reverse;
}
@keyframes spinArc { 100% { transform: rotate(360deg); } }

.btn-arc {
    display: inline-block; padding: 16px 40px; font-size: 15px; font-weight: 600;
    color: var(--arc-bg); background: var(--arc-primary); border-radius: 30px;
    transition: all 0.3s; margin-right: 20px; box-shadow: 0 10px 20px rgba(0, 229, 255, 0.2);
}
.btn-arc:hover { transform: translateY(-3px); box-shadow: 0 15px 25px rgba(0, 229, 255, 0.3); }
.btn-arc-alt {
    display: inline-block; padding: 16px 40px; font-size: 15px; font-weight: 600;
    color: var(--arc-text); background: var(--arc-card); border-radius: 30px;
    border: 1px solid rgba(255, 255, 255, 0.1); transition: all 0.3s;
}
.btn-arc-alt:hover { border-color: var(--arc-primary); color: var(--arc-primary); }

/* Stats */
.arc-stats {
    display: flex; justify-content: space-between; margin-bottom: 100px;
    padding: 40px 0; border-top: 1px solid rgba(255,255,255,0.05); border-bottom: 1px solid rgba(255,255,255,0.05);
}
.as-item { text-align: center; flex: 1;}
.as-val { font-size: 36px; font-weight: 800; color: #fff; margin-bottom: 5px;}
.as-lbl { font-size: 13px; color: #8b9bb4; text-transform: uppercase; letter-spacing: 1px;}

/* Grid */
.arc-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 30px; margin-bottom: 100px;}
.ag-card {
    background: var(--arc-card); padding: 40px; border-radius: 16px;
    border: 1px solid rgba(255, 255, 255, 0.03); transition: all 0.3s;
    position: relative; overflow: hidden;
}
.ag-card::before {
    content: ''; position: absolute; top: 0; left: 0; width: 100%; height: 2px;
    background: linear-gradient(90deg, transparent, var(--arc-primary), transparent);
    transform: translateX(-100%); transition: transform 0.5s;
}
.ag-card:hover::before { transform: translateX(100%); }
.ag-card:hover { transform: translateY(-5px); border-color: rgba(0, 229, 255, 0.2); box-shadow: 0 20px 40px rgba(0,0,0,0.2);}
.ag-card h3 { font-size: 20px; font-weight: 700; margin-bottom: 15px; color: #fff;}
.ag-card p { font-size: 15px; color: #8b9bb4;}

/* Nodes */
.arc-nodes { margin-bottom: 100px;}
.arc-nodes h2 { font-size: 28px; font-weight: 800; margin-bottom: 40px; color: #fff; text-align: center;}
.an-list { display: flex; flex-wrap: wrap; gap: 15px; justify-content: center;}
.an-item {
    padding: 10px 20px; background: rgba(0, 229, 255, 0.05); border: 1px solid rgba(0, 229, 255, 0.2);
    border-radius: 20px; font-size: 14px; color: var(--arc-primary); font-weight: 500;
}

/* FAQ */
.arc-faq { margin-bottom: 100px; max-width: 800px; margin-left: auto; margin-right: auto;}
.arc-faq h2 { font-size: 28px; font-weight: 800; margin-bottom: 40px; color: #fff; text-align: center;}
.a-faq-item { margin-bottom: 25px; border-bottom: 1px solid rgba(255,255,255,0.05); padding-bottom: 25px;}
.a-fq { font-size: 18px; font-weight: 600; color: #fff; margin-bottom: 12px;}
.a-fa { font-size: 15px; color: #8b9bb4;}

footer { text-align: center; padding: 40px 0; border-top: 1px solid rgba(255,255,255,0.05); color: #5c6b82; font-size: 14px;}

@media (max-width: 900px) {
    .arc-hero { flex-direction: column; text-align: center; }
    .ah-content { padding-right: 0; margin-bottom: 50px;}
    .ah-content p { margin: 0 auto 40px;}
    .arc-stats { flex-wrap: wrap; gap: 30px;}
    .as-item { min-width: 40%;}
    .arc-grid { grid-template-columns: 1fr; }
    .btn-arc, .btn-arc-alt { display: block; margin: 10px auto; width: 80%;}
}