/* Section introduction */
.intro {
    padding: 60px 0;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
}

.intro-content {
    max-width: 1200px;
    margin: 0 auto;
}

.intro-main h2 {
    font-size: 2.5rem;
    color: #2c3e50;
    margin-bottom: 2rem;
    line-height: 1.2;
    font-weight: 700;
}

.intro-main p {
    font-size: 1.1rem;
    color: #34495e;
    margin-bottom: 2rem;
    line-height: 1.6;
}

.intro-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.intro-card {
    background: rgba(255, 255, 255, 0.9);
    border-radius: 15px;
    padding: 2rem;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.intro-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.intro-card i {
    font-size: 2.5rem;
    color: #3498db;
    margin-bottom: 1rem;
}

.intro-card h3 {
    font-size: 1.3rem;
    color: #2c3e50;
    margin-bottom: 1rem;
    line-height: 1.4;
}

.intro-card p {
    color: #34495e;
    line-height: 1.6;
    margin: 0;
}

.intro-advantages {
    margin-top: 3rem;
}

.intro-advantages h3 {
    font-size: 1.8rem;
    color: #2c3e50;
    margin-bottom: 1.5rem;
}

.advantages-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.advantage-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.8);
    border-radius: 10px;
    transition: transform 0.3s ease;
}

.advantage-item:hover {
    transform: translateX(5px);
}

.advantage-item i {
    font-size: 1.5rem;
    color: #3498db;
    flex-shrink: 0;
    margin-top: 0.2rem;
}

.advantage-item span {
    color: #34495e;
    line-height: 1.5;
}

/* Responsive */
@media (max-width: 768px) {
    .intro {
        padding: 40px 0;
    }

    .intro-main h2 {
        font-size: 2rem;
        text-align: center;
    }

    .intro-main p {
        text-align: center;
        font-size: 1rem;
    }

    .intro-cards {
        grid-template-columns: 1fr;
        max-width: 400px;
        margin-left: auto;
        margin-right: auto;
        gap: 1.5rem;
    }

    .intro-card {
        padding: 1.5rem;
        text-align: center;
    }

    .advantages-list {
        grid-template-columns: 1fr;
    }

    .advantage-item {
        padding: 0.8rem;
    }
}

@media (max-width: 480px) {
    .intro-main h2 {
        font-size: 1.8rem;
    }

    .intro-card {
        padding: 1.2rem;
    }

    .intro-card i {
        font-size: 2rem;
    }

    .intro-card h3 {
        font-size: 1.2rem;
    }
}