:root {
            --primary-color: #FF9933;
            --secondary-color: #138808;
            --accent-color: #000080;
            --text-dark: #333333;
            --text-light: #666666;
            --bg-light: #f8f9fa;
        }
        body {
            font-family: 'Segoe UI', system-ui, sans-serif;
            line-height: 1.7;
            color: var(--text-dark);
            background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
        }
        .navbar-brand {
            font-weight: 800;
            font-size: 1.8rem;
            color: var(--accent-color) !important;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.1);
        }
        .smart-kick-text {
            color: var(--primary-color);
            font-style: italic;
        }
        .ace-text {
            color: var(--secondary-color);
            font-weight: bold;
        }
        h1, h2, h3 {
            font-weight: 700;
            margin-bottom: 1.5rem;
            color: var(--accent-color);
        }
        h1 {
            font-size: 2.8rem;
            border-bottom: 3px solid var(--primary-color);
            padding-bottom: 0.5rem;
            margin-top: 2rem;
        }
        h2 {
            font-size: 2.2rem;
            margin-top: 3rem;
            padding-left: 1rem;
            border-left: 5px solid var(--secondary-color);
        }
        h3 {
            font-size: 1.8rem;
            color: var(--primary-color);
            margin-top: 2.5rem;
        }
        .lead {
            font-size: 1.3rem;
            color: var(--text-light);
            margin-bottom: 2.5rem;
        }
        p {
            margin-bottom: 1.8rem;
            text-align: justify;
            font-size: 1.1rem;
        }
        .highlight-box {
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            color: white;
            padding: 2rem;
            border-radius: 15px;
            margin: 2.5rem 0;
            box-shadow: 0 10px 30px rgba(0,0,0,0.15);
        }
        .feature-icon {
            font-size: 2.5rem;
            color: var(--primary-color);
            margin-bottom: 1rem;
        }
        .img-container {
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 8px 25px rgba(0,0,0,0.15);
            margin: 2.5rem 0;
            transition: transform 0.3s ease;
        }
        .img-container:hover {
            transform: translateY(-5px);
        }
        .nav-pills .nav-link.active {
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            font-weight: 600;
        }
        .nav-pills .nav-link {
            color: var(--text-dark);
            font-weight: 500;
            margin: 0.3rem 0;
            border-radius: 8px;
            transition: all 0.3s ease;
        }
        .nav-pills .nav-link:hover {
            background-color: rgba(255, 153, 51, 0.1);
        }
        footer {
            background: linear-gradient(135deg, var(--accent-color), #1a237e);
            color: white;
            padding: 3rem 0;
            margin-top: 4rem;
        }
        .content-section {
            background: white;
            border-radius: 18px;
            padding: 3rem;
            box-shadow: 0 5px 25px rgba(0,0,0,0.08);
            margin-bottom: 3rem;
        }
        .key-term {
            background-color: rgba(255, 153, 51, 0.1);
            padding: 0.2rem 0.5rem;
            border-radius: 4px;
            font-weight: 600;
            color: var(--primary-color);
        }
        @media (max-width: 768px) {
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.8rem;
            }
            .content-section {
                padding: 1.5rem;
            }
            .lead {
                font-size: 1.1rem;
            }
        }
        .strategy-card {
            border: none;
            border-radius: 12px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.08);
            transition: all 0.3s ease;
            margin-bottom: 2rem;
            height: 100%;
        }
        .strategy-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 12px 25px rgba(0,0,0,0.15);
        }
        .card-header {
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            color: white;
            font-weight: 600;
            border-radius: 12px 12px 0 0 !important;
            padding: 1.2rem;
        }
        .table-of-contents {
            position: sticky;
            top: 2rem;
            background: white;
            border-radius: 12px;
            padding: 1.5rem;
            box-shadow: 0 5px 15px rgba(0,0,0,0.08);
        }