/* roulang page: index */
:root {
      --primary-deep: #4C1D95;
      --primary-blue: #2563EB;
      --accent-cyan: #00F0FF;
      --gold: #F59E0B;
      --bg-dark: #0A0A0F;
      --bg-card: rgba(255, 255, 255, 0.03);
      --border-subtle: rgba(255, 255, 255, 0.08);
      --border-glow: rgba(0, 240, 255, 0.3);
      --text-primary: #F1F5F9;
      --text-secondary: #CBD5E1;
      --text-muted: #94A3B8;
      --radius-xl: 1.5rem;
      --radius-2xl: 2rem;
      --shadow-card: 0 20px 40px -12px rgba(0,0,0,0.6);
      --glow-cyan: 0 0 20px rgba(0,240,255,0.35);
    }

    * {
      box-sizing: border-box;
    }

    body {
      font-family: 'Inter', -apple-system, 'PingFang SC', 'Microsoft YaHei', 'Segoe UI', sans-serif;
      background-color: var(--bg-dark);
      color: var(--text-primary);
      line-height: 1.6;
      margin: 0;
      -webkit-font-smoothing: antialiased;
    }

    .font-mono {
      font-family: 'SF Mono', 'Inter', 'Fira Code', monospace;
    }

    .glass-card {
      background: rgba(255, 255, 255, 0.03);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-2xl);
      box-shadow: var(--shadow-card);
      transition: all 0.3s ease;
    }

    .glass-card:hover {
      border-color: var(--border-glow);
      background: rgba(255, 255, 255, 0.06);
      box-shadow: 0 0 25px rgba(0,240,255,0.2);
      transform: translateY(-4px);
    }

    .btn-primary {
      background: linear-gradient(135deg, #4C1D95, #2563EB, #06B6D4);
      border: none;
      color: white;
      font-weight: 600;
      border-radius: 9999px;
      padding: 0.75rem 2rem;
      box-shadow: 0 0 18px rgba(0,240,255,0.4);
      transition: all 0.3s ease;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      letter-spacing: 0.5px;
    }

    .btn-primary:hover {
      box-shadow: 0 0 30px rgba(0,240,255,0.7);
      transform: scale(1.05);
      filter: brightness(1.1);
    }

    .btn-outline {
      background: transparent;
      border: 1px solid rgba(255,255,255,0.25);
      color: white;
      font-weight: 500;
      border-radius: 9999px;
      padding: 0.7rem 1.8rem;
      backdrop-filter: blur(8px);
      transition: all 0.3s ease;
    }

    .btn-outline:hover {
      border-color: var(--accent-cyan);
      color: var(--accent-cyan);
      box-shadow: 0 0 15px rgba(0,240,255,0.25);
    }

    .text-gradient {
      background: linear-gradient(to right, #A78BFA, #38BDF8, #00F0FF);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }

    .nav-blur {
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-bottom: 1px solid rgba(0,0,0,0.05);
    }

    .hero-bg {
      background-image: radial-gradient(circle at 30% 40%, rgba(37, 99, 235, 0.25) 0%, transparent 45%),
                        radial-gradient(circle at 80% 70%, rgba(6, 182, 212, 0.2) 0%, transparent 50%),
                        url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      background-blend-mode: overlay;
    }

    .data-dashboard {
      background: rgba(10, 10, 20, 0.7);
      backdrop-filter: blur(18px);
      border: 1px solid rgba(0,240,255,0.15);
      border-radius: 2.5rem;
      padding: 1.8rem;
    }

    .metric-digit {
      font-feature-settings: "tnum";
      letter-spacing: -0.5px;
    }

    .comparison-badge {
      background: linear-gradient(135deg, #F59E0B, #EA580C);
      border-radius: 9999px;
      padding: 0.3rem 2rem;
      font-weight: 700;
      color: black;
      box-shadow: 0 0 18px rgba(245,158,11,0.6);
    }

    @media (max-width: 768px) {
      .glass-card {
        border-radius: 1.5rem;
      }
      .data-dashboard {
        padding: 1.2rem;
      }
    }