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

body {
    font-family: Arial, Helvetica, sans-serif;
    background-color: #ffffff;
    color: #333333;
}

/* Header section */
.header {
    display: flex;
    color: #ffffff;
    background-color: #242424;
    height: 75px;
    justify-content: center;
    align-items: center;
}

.header h2 {
    font-size: 26px;
    font-weight: bold;
}

/* Promo banner section */
.promo {
    display: flex;
    background-image: url("../images/phonebgrd.jpg");
    background-size: cover;
    background-position: center 25%;
    background-repeat: no-repeat;
    height: 350px;
    justify-content: center;
    align-items: center;
    text-align: center;
}

.promo h2 {
    color: #ffff55;
    font-size: 40px;
    font-weight: bold;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.8), 0 0 10px rgba(0, 0, 0, 0.6);
}

/* Features description section */
.description {
    display: flex;
    gap: 24px;
    padding: 35px 25px;
    justify-content: center;
    max-width: 1300px;
    margin: 0 auto;
}

.feature {
    flex: 1;
    padding: 24px 20px;
    border: 1px solid #dcdcdc;
    border-radius: 8px;
    background-color: #ffffff;
}

.feature h3 {
    font-size: 16px;
    font-weight: bold;
    color: #111111;
    margin-bottom: 14px;
    line-height: 1.35;
}

.feature p {
    font-size: 14px;
    color: #333333;
    line-height: 1.45;
}

/* Call to action section */
.action {
    display: flex;
    flex-direction: column;
    color: #ffffff;
    background-color: #22a745;
    padding: 35px 20px 40px;
    justify-content: center;
    align-items: center;
    text-align: center;
}

.action h2 {
    font-size: 24px;
    font-weight: bold;
    margin-bottom: 18px;
}

.action button {
    padding: 9px 28px;
    border: none;
    border-radius: 4px;
    background-color: #ffffff;
    color: #222222;
    font-size: 15px;
    font-weight: normal;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.action button:hover {
    background-color: #f0f0f0;
}