*{
    margin: 0px;
    padding: 0px;
    font-family: Arial,Microsoft JhengHei;
}
::placeholder{
    color: #FFF;
    opacity: 0.8;
}
:-ms-input-placeholder { 
    color: #FFF;
}
::-ms-input-placeholder{
    color: #FFF;
}
body{
    font-size: 10rem;
    background-color: #DFFFFF;
}
.container{
    width: 100vw;
    height: 100vh;
    overflow-y: scroll;
}
.title{
    width: 50%;
    margin: 10% auto 20px auto;
    font-size: 3rem;
    color: #9BBBBB;
    letter-spacing: 10px;
    text-align: center;
}
.content{
    width: 50%;
    margin: 0px 25%;
    position: relative;
    font-size: 1.2rem;
    float: left;
    box-shadow: 3px 3px 10px #9BBBBB;
}
.content input[type="text"]{
    outline: 0;                                         /*清除focus外框*/
    width: 90%;
    height: 60px;
    padding: 0px 5%;
    font-size: 1.5rem;
    color: #FFF;
    border: none;
    background-color: #9BBBBB;
}
.content ul li{
    width: 90%;
    height: 50px;
    padding: 0px 5%;
    background-color: #FFF;
    list-style: none;
    line-height: 50px;
    color: #777;
}
.content input[type="checkbox"]{                        /*checkbox樣式可透過換background-image*/
    width: 15px;
    height: 15px;
    padding: 5px;
    margin-right: 5px; 
}
.content input[type="checkbox"]:checked + text{         /*法2,(法1在js)*/
    text-decoration: line-through;
}
.content button{
    height: 40px;
    margin: 5px 0px;
    color: #9BBBBB;
    font-size: 1.5rem;
    line-height: 50px;
    right: 5%;
    position: absolute;
    cursor: pointer;
    background-color: rgba(255,255,255,0);
    border: none;
}