ul li {
    list-style: none;
}

button {
    background-color: transparent;
}

button:focus {
    outline: 0;
    border: 1px #ddd solid;
}

#blackCover {
    width: 100%;
    height: 100%;
    overflow: hidden;
    position: fixed;
    top: 0;
    left: 0;
    display: none;
}

.container {
    padding-right: 0;
    padding-left: 0;
    margin-left: 0;
    margin-right: 0;
}

.black {
    background-color: rgba(0, 0, 0, 0.5) !important;
    display: block !important;
}

#blackCover>div {
    background-color: #ddd;
    width: 280px;
    height: 160px;
    margin-left: -140px;
    position: absolute;
    left: 50%;
    top: 75px;
    border-radius: 10px;
}

#blackCover span {
    display: block;
    text-align: center;
    color: #000;
    margin-top: 10px;
    font-size: 16px;
    font-weight: 700;
    padding: 5.4% 0;
    margin: 0 auto;
}

#information {
    text-align: justify;
    color: #3f3f3f;
    margin-bottom: 20px;
    padding: 0 10px;
    font-size: 15px;
}

#goOn {
    display: block;
    background-color: #ED171F;
    width: 30.4%;
    margin: 0 auto;
    font-size: 14px;
    color: #fff;
    font-weight: 700;
    height: 36px;
    border-radius: 8px;
    line-height: 36px;
    border: 1px solid red;
}

#examTitle {
    width: 100%;
    height: 100px;
    background-color: #27AE61;
}

#examTitle h1 {
    color: #FFFFFF;
    padding: 20px 0 30px 40px;
    float: left;
    width: 400px;
    font-size: 36px;
}

#timing {
    float: right;
    width: 220px;
    height: 50px;
    /* margin: 22px 30px 0 0; */
    background: url("data:image/svg+xml,%3Csvg class='icon' viewBox='0 0 1024 1024' xmlns='http://www.w3.org/2000/svg' width='32' height='32' %3E%3Cpath d='M913.892 470.344C866.856 339.898 752 239.779 609.227 207.91c36.588-52.48 97.191-86.976 165.988-86.976 111.86 0 202.508 90.683 202.508 202.49.036 58.032-24.706 109.998-63.83 146.923zM524.486 128.505v127.324c194.311 7.93 349.502 167.497 349.502 363.725 0 81.957-27.365 157.264-72.981 218.166l84.458 146.284-70.18 40.49-72.239-125.196c-63.247 52.852-144.637 84.723-233.508 84.723-88.377 0-169.375-31.443-232.481-83.802l-74.153 128.407-70.127-40.49 86.142-149.263c-46.167-61.065-73.886-136.903-73.886-219.34 0-194.933 153.149-353.615 345.545-363.527V128.467c-19.65-7.024-33.892-25.361-33.892-47.426 0-28.111 22.79-50.866 50.866-50.866 28.111 0 50.866 22.772 50.866 50.866 0 22.099-14.275 40.417-33.929 47.46zm-298.473 491.05c0 156.571 126.918 283.488 283.488 283.488s283.488-126.881 283.488-283.488c0-156.553-126.918-283.472-283.488-283.472S226.013 463.001 226.013 619.555zm368.477 61.278H492.704c-18.711 0-33.892-15.2-33.892-33.91V511.262c0-18.747 15.182-33.929 33.892-33.929 18.783 0 33.929 15.182 33.929 33.929V613.01h67.855c18.73 0 33.892 15.163 33.892 33.946 0 18.676-15.163 33.874-33.892 33.874zM110.179 470.344c-39.124-36.926-63.884-88.908-63.884-146.941 0-111.824 90.665-202.49 202.508-202.49 68.815 0 129.399 34.513 165.988 86.994-142.755 31.871-257.575 131.988-304.611 262.434z' fill='%23189837'/%3E%3C/svg%3E") 15px center no-repeat #fff;
    border-radius: 100px;
}

#timer {
    width: 60px;
    height: 40px;
    color: #3C926E;
    font-size: 24px;
    padding: 10px 0 0 60px;
    display: inline-block;
}

#suspend {
    width: 40px;
    height: 40px;
    border: none;
    border-radius: 100px;
    background-color: #6AC895;
    color: #fff;
    margin: 5px 8px;
    display: inline-block;
    font-size: 18px;
    font-weight: 800;
    line-height: 40px;
    text-align: center;
}

/*选题区域*/
#itemSelection {
    width: 25%;
    height: 100%;
    box-shadow: 4px 0 2px #EFF1F0;
    float: left;
    background: linear-gradient(to right, #EDF8F2 0%, #EDF8F2 97.9%, #C8CBCA 98%, #FAFAFA 100%);
    box-sizing: border-box;
}

#itemChoose {
    width: 100%;
    height: 600px;
    padding: 10px 12px 0 3px;
    box-sizing: border-box;
}

#itemChoose>div {
    width: 100%;
    margin: 6px;
    float: left;
}

#itemChoose button {
    width: 18px;
    height: 18px;
    text-align: center;
    font-size: 14px;
    border: 1px solid #39CB76;
    border-radius: 3px;
    color: #39CB76;
    font-family: "黑体";
    float: left;
    margin: 6px 3px 6px 6px;
}

#itemChoose>div p {
    height: 16px;
    line-height: 16px;
    text-align: left;
    float: left;
    margin: 6px 3px 6px 3px;
    font-size: 15px;
    color: #6EAD8B;
}

#itemChoose>div ul {
    display: block;
    margin: 0 3px;
    float: left;
    width: 100%;
}

#itemChoose>div li {
    text-align: center;
    font-size: 15px;
    border-radius: 3px;
    float: left;
    margin: 3px 5px;
    cursor: pointer;
}

.curAnswer {
    background-color: #6cb3e9;
    border: 1px solid #609080;
    color: #90B5A2;
    width: 22px;
    height: 22px;
    line-height: 22px;
    box-shadow: 0px 0px 4px #888888;
}

.markAnswer {
    background-color: #FFAD00 !important;
    border: 1px solid #FFAD00 !important;
    color: #fff !important;
    width: 22px;
    height: 22px;
    line-height: 22px;
}

.hasAnswer {
    background-color: #2AB064;
    border: 1px solid #2AB064;
    color: #fff;
    width: 22px;
    height: 22px;
    line-height: 22px;
}

.noAnswer {
    background-color: #F0FAF5;
    border: 1px solid #ddd;
    color: #90B5A2;
    width: 22px;
    height: 22px;
    line-height: 22px;
}

/*标记指示信息*/
#markInfo {
    width: 100%;
    height: 80px;
    background-color: #D5EDDF;
    box-sizing: border-box;
    padding: 8px 10px;
    background: linear-gradient(to right, #D5EDDF, #D6EEE0 97.9%, #A4BAAD 98%, #D2E8DB 100%);
}

#markInfo li {
    height: 20px;
    line-height: 20px;
    font-size: 18px;
    display: block;
    width: 60px;
    float: left;
    font-size: 12px;
    margin: 5px 10px;
}

#markInfo span {
    display: inline-block;
    width: 20px;
    height: 20px;
    border-radius: 3px;
    vertical-align: middle;
    margin-left: 5px;
}

#topic {
    width: 75%;
    height: 100%;
    float: left;
}

#info {
    width: 100%;
    height: 50px;
    background-color: #F2F2F2;
    float: left;
    font-family: "宋体";
    line-height: 50px;
    text-indent: 15px;
    font-size: 15px;
    color: #333;
}

#item {
    width: 100%;
    height: 550px;
    background-color: #FFFFFF;
    float: left;
    padding: 20px 30px;
    box-sizing: border-box;
    position: relative;
}


#index {
    font-style: normal;
    margin-bottom: 20px;
    display: block;
    font-size: 20px;
    color: #1F834B;
    font-weight: 800;
}

#describe {
    line-height: 23px;
    word-spacing: 20px;
    letter-spacing: 1px;
    text-align: justify;
    margin-bottom: 15px;
}

/* 题目中的图片 */
#describe img {
    max-width: 80%;
    margin: 10px auto;
}

#option {
    background-color: #EEF9F3;
    padding: 10px 15px;
    border-radius: 5px;
}

#option p {
    display: inline-block;
    line-height: 17px;
    text-align: justify;
    margin: 5px 20px 0 10px;
}

#option i {
    font-style: normal;
}

#option li {
    margin: 5px 0;
}

#explain {
    margin: 0 30px;
    width: 626px;
    background: rgba(87, 192, 133, 0.05);
    position: absolute;
    bottom: 20px;
    right: 0;
    border: 1px dashed #ffd;
    border-radius: 5px;
    padding: 10px 15px;
    text-align: justify;
    font-size: 16px;
    color: #3f3f3f;
    line-height: 22px;
}

#explain p:first-child {
    color: #4B7C5F;
    font-weight: 800;
    margin: 0 0 6px -8px;
}

#ctrlBtn {
    width: 100%;
    height: 80px;
    background-color: #D5EDDF;
    float: left;
}

#ctrlBtn button {
    width: 80px;
    height: 36px;
    border: none;
    border-radius: 3px;
    text-align: center;
    color: #fff;
    font-size: 16px;
    float: left;
    margin: 20px -24px 12px 30px;
}

.enable {
    color: #EEE !important;
}

#prevItem,
#nextItem,
#calculator {
    background-color: #2BC76D;
}

#markItem {
    background-color: #FBAD04;
    margin-left: 40px !important;
}

#submit {
    background-color: #FF635C;
    margin-left: 240px !important;
}