* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: Arial, Helvetica, sans-serif;
    background-color: #f0f2f5;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
}

.product-container {
    width: 100%;
    max-width: 850px;
    background-color: #ffffff;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    border-radius: 4px;
    overflow: hidden;
}

.product-header {
    background-color: #2f3640;
    color: #ffffff;
    text-align: center;
    padding: 15px;
    font-size: 20px;
    font-weight: bold;
}

.hero-banner {
    position: relative;
    height: 280px;
    background-image: linear-gradient(rgba(0, 0, 0, 0.35), rgba(0, 0, 0, 0.35)), url('../images/phonebgrd.jpg'); 
    background-size: cover;
    background-position: center;
    display: flex;
    justify-content: center;
    align-items: center;
}

.banner-title {
    color: #d4af37;
    font-size: 30px;
    font-weight: bold;
    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.6);
    text-align: center;
    padding: 0 20px;
}

.features-grid {
    display: flex;
    padding: 30px 20px;
    background-color: #ffffff;
    gap: 20px;
}

.feature-item {
    flex: 1;
    padding: 0 20px;
    border-right: 1px solid #dcdcdc;
}
.feature-item:last-child {
    border-right: none;
}

.feature-item h3 {
    font-size: 15px;
    color: #2c3e50;
    margin-bottom: 8px;
    font-weight: bold;
    line-height: 1.4;
}

.feature-item p {
    font-size: 13px;
    color: #7f8c8d;
    line-height: 1.5;
}

.cta-banner {
    background-color: #4cd137;
    padding: 25px 20px;
    text-align: center;
    color: #ffffff;
}

.cta-banner p {
    font-size: 17px;
    font-weight: bold;
    margin-bottom: 12px;
}

.btn-buy {
    background-color: #ffffff;
    color: #2f3640;
    border: none;
    padding: 8px 24px;
    font-size: 13px;
    border-radius: 3px;
    cursor: pointer;
    transition: background-color 0.2s, color 0.2s;
}

.btn-buy:hover {
    background-color: #2f3640;
    color: #ffffff;
}