body {
    font-family: Arial, sans-serif;
    margin: 0;
    background-color: #f5f5f7;
}
.header {
    background-color: #1f1f1f;
    color: white;
    text-align: center;
    padding: 15px 0;
    font-size: 20px;
    font-weight: bold;
}
.banner {
    height: 350px;
    background: #2c3e50 url(../images/phonebgrd.jpg) center/cover;
    opacity: 0.5;
    display: flex;
    align-items: center;
    justify-content: center;
}
.banner h2 {
    color: #f1c40f;
    font-size: 36px;
    text-shadow: 2px 2px 8px rgba(0,0,0,0.7);
    margin: 0;
}
.features {
    display: flex;
    max-width: 1200px;
    margin: 40px auto;
    padding: 0 20px;
    gap: 20px;
}
.box {
    flex: 1;
    background: white;
    padding: 25px;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
}
.box h3 { margin-top: 0; font-size: 16px; color: #1d1d1f; }
.box p { color: #86868b; font-size: 14px; line-height: 1.5; }
.footer {
    background-color: #27ae60;
    color: white;
    text-align: center;
    padding: 30px;
}
.footer p { margin: 0 0 15px 0; font-size: 18px; font-weight: bold; }
.btn {
    background: white; color: #27ae60; border: none;
    padding: 10px 35px; font-size: 16px; font-weight: bold;
    border-radius: 4px; cursor: pointer;
}