/* ============================
   Bluetooth Advantages Section
   「Bluetoothだからできる通信の強み」
   ============================ */

.bt-advantages {
    background: linear-gradient(135deg, #ffffff 0%, #f5f8fc 100%);
    padding: 80px 0;
    overflow: hidden;
}

.bt-advantages__inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.bt-advantages__title {
    font-size: 2.25rem;
    font-weight: 700;
    color: #1a1a1a;
    text-align: center;
    margin-bottom: 60px;
    letter-spacing: 0.02em;
}

/* 3 reasons grid - using existing bt-reasons4 styles */
.bt-advantages .bt-reasons4 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.bt-advantages .bt-reasons4__card {
    border-radius: 20px;
    border: 2px solid #e5e7eb;
    background: #fff;
    box-shadow: 0 12px 30px rgba(17,24,39,0.08);
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.bt-advantages .bt-reasons4__card:hover {
    transform: translateY(-4px);
    box-shadow: 0 16px 40px rgba(17,24,39,0.12);
}

.bt-advantages .bt-reasons4__imgWrap {
    background: #f8fafc;
    padding: 16px;
}

.bt-advantages .bt-reasons4__img {
    width: 100%;
    height: 180px;
    object-fit: cover;
    border-radius: 12px;
    display: block;
    transition: transform 0.3s ease;
}

.bt-advantages .bt-reasons4__card:hover .bt-reasons4__img {
    transform: scale(1.05);
}

.bt-advantages .bt-reasons4__label {
    margin: 0;
    padding: 16px 20px 8px;
    font-weight: 700;
    color: #111827;
    font-size: 1.125rem;
    text-align: center;
}

.bt-advantages .bt-reasons4__subtext {
    margin: 0;
    padding: 0 16px 16px;
    text-align: center;
    color: #6b7280;
    font-weight: 500;
    font-size: 0.9375rem;
}

/* Responsive */
@media (max-width: 980px) {
    .bt-advantages {
        padding: 60px 0;
    }
    
    .bt-advantages__title {
        font-size: 1.75rem;
        margin-bottom: 40px;
    }
    
    .bt-advantages .bt-reasons4 {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
}

@media (max-width: 640px) {
    .bt-advantages {
        padding: 50px 0;
    }
    
    .bt-advantages__title {
        font-size: 1.5rem;
        margin-bottom: 32px;
    }
    
    .bt-advantages .bt-reasons4 {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    
    .bt-advantages .bt-reasons4__img {
        height: 140px;
    }
}