*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "微软雅黑",sans-serif;
}
body{
    background-color: #f3f6fa;
    padding: 20px 15px;
}
.wrap{
    max-width: 750px;
    margin: 0 auto;
}
h1{
    text-align: center;
    color: #2054aa;
    margin-bottom: 20px;
    font-size: 24px;
}
.block{
    background: #ffffff;
    border-radius: 10px;
    padding: 20px;
    margin-bottom: 16px;
    box-shadow: 0 1px 6px rgba(0,0,0,0.1);
}
h3{
    color: #2054aa;
    margin-bottom: 12px;
    font-size: 16px;
}
.in-row,.sel-row,.hand-row{
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    align-items: center;
}
input,select{
    padding: 10px;
    border: 1px solid #ccd6e0;
    border-radius: 6px;
    font-size: 16px;
}
button{
    padding: 10px 16px;
    background: #2054aa;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 15px;
}
button:hover{
    background: #184488;
}
.word-box{
    margin-top: 12px;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}
.char-item{
    font-size: 22px;
    padding: 6px 10px;
    background: #e8f0fc;
    border-radius: 5px;
    cursor: pointer;
}
.char-item:hover{
    background: #cfe0f7;
}
#writeCanvas{
    border: 1px solid #ccc;
    background: #fff;
    border-radius: 6px;
    margin: 8px 0;
}
.tip{
    font-size: 14px;
    color: #666;
}
#resultBox{
    background: #fff;
    padding: 25px;
    border-radius: 10px;
    box-shadow: 0 1px 6px rgba(0,0,0,0.1);
}
.big-char{
    font-size: 70px;
    text-align: center;
    color: #2054aa;
    font-weight: bold;
    margin-bottom: 10px;
}
.btn-voice{
    background: #27ae60;
    margin-bottom: 15px;
}
.line{
    font-size: 16px;
    color: #333;
    margin: 6px 0;
}
.explain{
    margin-top: 18px;
}
.explain h4{
    border-left: 4px solid #2054aa;
    padding-left: 8px;
    margin-bottom: 8px;
    color: #2054aa;
}
.explain p{
    line-height: 1.8;
    color: #444;
}
.err{
    color: #e53e3e;
    padding: 10px;
    text-align: center;
}