.intro-hero {
    background: linear-gradient(135deg, var(--secondary-green) 0%, #F0F8F0 100%);
    border-radius: 24px;
    padding: 64px 32px;
    margin-bottom: 48px;
    text-align: center;
    border: 1px solid rgba(40, 199, 111, 0.1);
    position: relative;
    overflow: hidden;
}

.intro-hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(3, 199, 90, 0.05) 0%, transparent 70%);
    animation: rotate 20s linear infinite;
}

@keyframes rotate {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.intro-content {
    position: relative;
    z-index: 2;
}

.intro-title {
    font-size: 3rem;
    font-weight: 800;
    color: var(--text-dark);
    margin-bottom: 24px;
    letter-spacing: -1px;
}

.intro-subtitle {
    font-size: 1.5rem;
    color: var(--text-light);
    font-weight: 500;
    margin-bottom: 32px;
    line-height: 1.6;
}

.feature-card {
    background: var(--white);
    border-radius: 20px;
    padding: 32px;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
    border: 2px solid var(--border-light);
    height: 100%;
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-green);
}

.feature-icon {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, var(--primary-green) 0%, var(--primary-green-light) 100%);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    color: white;
    font-size: 1.5rem;
}

.feature-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 16px;
}

.feature-description {
    color: var(--text-light);
    line-height: 1.6;
    font-size: 1rem;
}

.feedback-section {
    background: var(--white);
    border-radius: 20px;
    padding: 40px;
    box-shadow: var(--shadow-sm);
    border: 2px solid var(--border-light);
    margin-top: 48px;
}

.feedback-form {
    display: none;
    margin-top: 24px;
    padding: 24px;
    background: var(--background-light);
    border-radius: 16px;
    border: 1px solid var(--border-light);
}

.feedback-form.show {
    display: block;
    animation: slideDown 0.3s ease;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.btn-feedback {
    background: linear-gradient(135deg, var(--primary-green) 0%, var(--primary-green-light) 100%);
    border: none;
    border-radius: 12px;
    padding: 16px 32px;
    font-weight: 600;
    letter-spacing: -0.3px;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-sm);
    color: white;
}

.btn-feedback:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    background: linear-gradient(135deg, var(--primary-green-dark) 0%, var(--primary-green) 100%);
    color: white;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 24px;
    margin: 48px 0;
}

.stat-item {
    text-align: center;
    padding: 24px;
    background: var(--white);
    border-radius: 16px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-light);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--primary-green);
    display: block;
    margin-bottom: 8px;
}

.stat-label {
    color: var(--text-light);
    font-weight: 600;
    font-size: 0.95rem;
}

@media (max-width: 768px) {
    .intro-title {
        font-size: 2rem;
    }
    
    .intro-subtitle {
        font-size: 1.2rem;
    }
    
    .intro-hero {
        padding: 48px 24px;
    }
    
    .feature-card {
        padding: 24px;
    }
    
    .feedback-section {
        padding: 24px;
    }
}

.letter {
    background-color: #FAF3DD;
    width: 60%;
    text-align: left;
    border-radius: 24px;
    padding: 32px 32px;
    margin: 0 auto;
    margin-bottom: 40px;
}