.read_bt {
    width: 170px;
    float: left;
    margin-top: 5px;
}

@media (min-width: 768px) and (max-width: 991px) {
    .read_bt {
        width: 160px;
    }
}

@media (min-width: 576px) and (max-width: 767px) {
      .read_bt {
        width: 150px;
      }
}

@media (max-width: 575px) {
      .read_bt {
        width: 120px;
      }
}

.read_bt a {
    width: 100%;
    float: left;
    font-size: 16px;
    color: #ffffff;
    background-color: #337ab7;/*rgba(103, 154, 245, 1);/*#05141f;*/
    text-align: center;
    padding: 10px 0px;
    /*text-transform: uppercase;*/
    border: 1px solid #337ab7;/*rgba(103, 154, 245, 1);/*#05141f;*/
    border-radius: 8px;
}

.read_bt a:hover {
    color: #fff;
    background-color: transparent;
    border: 1px solid #fff;
}

.read_bt:hover,
.read_bt:focus,
.read_bt:active {
    color: #fff;
    background-color: rgba(0,0,0,0.7);
    border-radius: 8px;
}

.align_text {
    text-align: center;
}

.width_text {
    width:100%;
}

.none_text {
    float:none;
}

.none_border {
    border: none;
}

.style_background {
    padding: 60px 20px; 
    background: #ffffff;
}

.margin_text_align {
    max-width: 1100px;
    margin: 0 auto; 
    text-align: center;
}

.font_margin {
    font-size: 2rem;
    margin-bottom: 40px;
}

.margin_bottom {
    margin-bottom: 50px;
}

.font_color {
    font-size: 1.5rem; 
    color: #007bff;
}

.font_width_margin {
    font-size: 1.1rem; 
    max-width: 800px; 
    margin: 10px auto;
}

.padding_font_width_margin_text_align {
    list-style: none; 
    padding: 0; 
    font-size: 1rem; 
    max-width: 600px; 
    margin: 20px auto; 
    text-align: left;
}

.list_padding_width_margin_text_align {
    list-style: none; 
    padding: 0; font-size: 1rem; 
    max-width: 600px; 
    margin: 20px auto; 
    text-align: left;
}

.border_zero {
    border:0;
}
.videdrone_color {
    color:#336699;
}