:root {
            --primary-color: #3498db;
            --secondary-color: #2980b9;
            --accent-color: #e74c3c;
            --light-color: #ecf0f1;
            --dark-color: #2c3e50;
            --text-color: #333;
            --border-radius: 8px;
            --box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
        }
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Vazirmatn', sans-serif;
        }
        
        body {
            background-color: #f5f5f5;
            color: var(--text-color);
            line-height: 1.6;
        }
        
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        
        header {
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            color: white;
            padding: 2rem 0;
            text-align: center;
            margin-bottom: 2rem;
            border-bottom: 5px solid var(--accent-color);
        }
        
        h1 {
            font-size: 2.5rem;
            margin-bottom: 1rem;
        }
        
        h2 {
            color: var(--secondary-color);
            margin: 2rem 0 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--primary-color);
        }
        
        h3 {
            color: var(--dark-color);
            margin: 1.5rem 0 0.5rem;
        }
        
        .breadcrumb {
            background-color: var(--light-color);
            padding: 1rem;
            border-radius: var(--border-radius);
            margin-bottom: 2rem;
        }
        
        .breadcrumb a {
            color: var(--secondary-color);
            text-decoration: none;
        }
        
        .content-box {
            background-color: white;
            border-radius: var(--border-radius);
            padding: 2rem;
            margin-bottom: 2rem;
            box-shadow: var(--box-shadow);
        }
        
        .note {
            background-color: #fff8e1;
            border-right: 4px solid #ffc107;
            padding: 1rem;
            margin: 1rem 0;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
        }
        
        .warning {
            background-color: #ffebee;
            border-right: 4px solid var(--accent-color);
            padding: 1rem;
            margin: 1rem 0;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
        }
        
        .steps {
            counter-reset: step-counter;
            margin: 1.5rem 0;
        }
        
        .step {
            position: relative;
            padding-left: 3rem;
            margin-bottom: 1.5rem;
        }
        
        .step:before {
            counter-increment: step-counter;
            content: counter(step-counter);
            position: absolute;
            left: 0;
            top: 0;
            background-color: var(--primary-color);
            color: white;
            width: 2rem;
            height: 2rem;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
        }
        
        .receiver-list {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 1rem;
            margin: 1rem 0;
        }
        
        .receiver-item {
            background-color: var(--light-color);
            padding: 1rem;
            border-radius: var(--border-radius);
            text-align: center;
            transition: transform 0.3s;
        }
        
        .receiver-item:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
        }
        
        .features {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 1.5rem;
            margin: 2rem 0;
        }
        
        .feature {
            background-color: white;
            padding: 1.5rem;
            border-radius: var(--border-radius);
            box-shadow: var(--box-shadow);
            text-align: center;
            transition: all 0.3s;
        }
        
        .feature:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.15);
        }
        
        .feature-icon {
            font-size: 2.5rem;
            color: var(--primary-color);
            margin-bottom: 1rem;
        }
        
        .download-btn {
            display: inline-block;
            background-color: var(--primary-color);
            color: white;
            padding: 0.8rem 1.5rem;
            border-radius: var(--border-radius);
            text-decoration: none;
            font-weight: bold;
            margin: 1rem 0;
            transition: background-color 0.3s;
        }
        
        .download-btn:hover {
            background-color: var(--secondary-color);
        }
        
        footer {
            background-color: var(--dark-color);
            color: white;
            text-align: center;
            padding: 2rem 0;
            margin-top: 3rem;
        }
        
        .contact-info {
            display: flex;
            justify-content: center;
            gap: 2rem;
            margin: 1rem 0;
        }
        
        .contact-info a {
            color: white;
            text-decoration: none;
        }
        
        @media (max-width: 768px) {
            h1 {
                font-size: 2rem;
            }
            
            .receiver-list, .features {
                grid-template-columns: 1fr;
            }
            
            .contact-info {
                flex-direction: column;
                gap: 1rem;
            }
        }

:root {
    --primary-red: #e63946;
    --dark-red: #d62839;
    --pure-white: #ffffff;
    --shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
}

.floating-btn {
    position: fixed;
    bottom: 20px;
    right: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    background-color: var(--primary-red);
    color: var(--pure-white);
    padding: 15px 25px;
    border-radius: 50px;
    text-decoration: none;
    font-family: 'Yekan', 'Segoe UI', Tahoma, sans-serif;
    font-weight: 700;
    font-size: 1.1rem;
    box-shadow: var(--shadow);
    z-index: 9999;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    border: none;
    cursor: pointer;
    overflow: hidden;
}

.floating-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(45deg, var(--primary-red), var(--dark-red));
    z-index: -1;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.floating-btn:hover {
    transform: translateY(-5px) scale(1.05);
    box-shadow: 0 10px 25px rgba(230, 57, 70, 0.3);
}

.floating-btn:hover::before {
    opacity: 1;
}

.floating-btn:active {
    transform: translateY(-2px) scale(0.98);
}

.icon {
    font-size: 1.2rem;
    transition: transform 0.3s ease;
}

.floating-btn:hover .icon {
    transform: translateY(-3px);
}

/* افکت پالس */
@keyframes pulse {
    0% {
        box-shadow: 0 0 0 0 rgba(230, 57, 70, 0.7);
    }
    70% {
        box-shadow: 0 0 0 12px rgba(230, 57, 70, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(230, 57, 70, 0);
    }
}

.pulse-effect {
    animation: pulse 2s infinite;
}

/* حالت موبایل */
@media (max-width: 768px) {
    .floating-btn {
        bottom: 30px;
        right: 20px;
        padding: 12px 20px;
        font-size: 1rem;
    }
    
    
    .floating-btn .icon {
        font-size: 1.4rem;
        margin: 0;
    }
}