* {
    margin: 0;
    padding: 0
}
:focus {
    outline: 0
}
img {
    border: none
}
html {
    font-size: 62.5%;
    height: 100%
}
body {
    font-size: 1.2rem;
    height: 100%;
    font-family: Helvetica, Arial, sans-serif;
    color: #000;
    background: #000
}
body.bg2 {
    background: url(../img/bg3.jpg) no-repeat center 0;
    background-size: cover
}
ol, ul {
    list-style: none
}
input[type="button"], input[type="submit"], button {
    cursor: pointer
}
.first_page {
    height: 100%;
    text-align: center
}
.radar_scanner {
    display: none;
    margin: 0 auto;
    text-align: center;
    background: url(../img/bg2.jpg) no-repeat center 0;
    background-size: cover;
    height: 100%;
    width: 100%;
    color: #fff;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0
}
h3.radar_title {
    font-size: 1.4rem;
    line-height: 140px
}
#popup-wrapper {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 10;
    background: url(../img/bg1.jpg) center center no-repeat #000;
    background-size: auto 100%; /* 高度自适应屏幕高度，宽度按比例缩放 */
}
.popup_alert {
    position: absolute;
    width: 380px;
    height: 135px;
    left: 0;
    top: 0;
    bottom: 0;
    right: 0;
    margin: auto;
    z-index: 100;
    padding: 0 0 20px;
    overflow: hidden;
    border: 1px solid #949494;
    background-color: #ededed;
    border-radius: 5px;
    box-shadow: 0 0 18px rgba(0,0,0,.4);
    font-size: 1.3rem;
    text-align: center
}
.popup_alert .top {
    height: 23px;
    background: #ccc;
    border-bottom: 1px solid #696969;
    border-radius: 5px 5px 0 0
}
.popup_alert .alert_text h5 {
    font-size: 1.4rem;
    margin: 10px 0
}
.popup_alert .popup_close {
    margin: 10px 3px 0 3px;
    display: inline-block;
    text-decoration: none;
    width: 78px;
    height: 21px;
    border-radius: 4px;
    border: 1px solid #9a9a9a;
    background: #ccc;
    font-size: 1.4rem;
    color: #000;
    height: 20px;
    line-height: 20px
}
.second_page {
    display: none
}
.intro_image {
    display: inline-block
}
.second_page .step {
    display: none;
    background: #000;
    color: #fff;
    box-shadow: 0 5px 15px rgba(0,0,0,.5);
    width: 600px;
    position: absolute;
    left: 0;
    right: 0;
    top: 50%;
    margin: -150px auto 0;
    line-height: 28px;
    font-size: 2.2rem;
    text-align: center
}
.second_page .step1 {
    display: block
}
.second_page .step1, .second_page .step2, .second_page .step3, .second_page .step4, .second_page .step5 {
    margin-top: -125px
}
.step_header {
    padding: 22px 0;
    background: #f0557b;
    color: #fff;
    font-weight: bold;
    text-align: center
}
.step_header ul {
    text-align: center
}
.step_header li {
    display: inline-block;
    font-size: 2.3rem;
    color: #fff;
    margin-left: 5px;
    font-weight: bold
}
.step_header li:first-child {
    margin-left: 0
}
.circle {
    border-radius: 100px;
    padding: 5px 13px;
    background: #555;
    text-shadow: 0 1px #666
}
.circle.active {
    color: #000;
    background: #e7e7e7
}
.step_content {
    padding: 10px 30px 20px;
    text-align: left
}
.step_content p {
    margin: 10px 0
}
.button_block {
    text-align: center;
    padding-top: 15px;
    clear: both;
    overflow: hidden
}
.button_block a {
    color: #fff;
    cursor: pointer;
    font-size: 3rem;
    width: 40%;
    padding: 15px 0;
    border-radius: 4px;
    display: inline-block;
    text-align: center;
    text-decoration: none;
    text-transform: uppercase;
    font-weight: bold
}
.btn_ok, .btn_next, .btn_start {
    background-color: #3cbc1d
}
.button_block a.btn_no {
    background: #56575b;
    color: #fff;
    border-radius: 0 4px 4px 0
}
.button_block a.btn_yes {
    background: #f0557b;
    color: #fff;
    border-radius: 4px 0 0 4px
}
.checkbox_wrap {
    width: 60%;
    margin: 0 auto
}
.notice {
    font-size: 1.8rem;
    margin: 10px 0;
    text-align: center
}
.option {
    color: #fff;
    display: block;
    padding-left: 50px;
    margin-bottom: 15px;
    position: relative;
    line-height: 20px;
    cursor: pointer
}
.option:after {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    display: block;
    width: 20px;
    height: 20px;
    box-sizing: border-box;
    border: 2px solid #fff;
    border-radius: 2px
}
.option.checked:after {
    background: url(../img/checked.png) center center no-repeat
}
.icon-buttons {
    display: flex;
    justify-content: center;
    gap: 40px;
    padding: 15px 0;
}
.icon-button {
    display: inline-block;
    text-align: center;
}
.icon-button img {
    width: 96px;
    height: 96px;
    object-fit: contain;
}
@media (max-width: 600px) {
    html {
        font-size: 55%
    }
    .second_page .step {
        max-width: 600px;
        width: 100%
    }
    .popup_alert {
        width: 90%;
        max-width: 320px
    }
    .step_header {
        padding: 5px 0
    }
    .step_content {
        padding: 5px 10px 10px;
        line-height: 1.1
    }
    .checkbox_wrap {
        width: 100%
    }
    .button_block a {
        font-size: 1.8rem
    }
    #popup-wrapper {
        background-position: 0 0
    }
    .icon-buttons {
        gap: 40px;
        padding: 10px 0;
    }
    .icon-button img {
        width: 96px;
        height: 96px;
    }
}
@media (max-height: 650px) {
    #popup-wrapper {
        background-position: center 0
    }
}
@media (max-height: 375px) {
    #popup-wrapper {
        background-position: right 0
    }
}