* {
    /* border: 1px solid black; */
    box-sizing: border-box;
}

body {
    background: #f4f7f6;
    font-family: system-ui, sans-serif;
}

form {
    margin: 30px auto;

    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: space-around;
    gap: 22px;

    width: 90%;
    max-width: 500px;
    padding: 30px 0 30px 0;
    background-color: #fff;
    border: 1px solid #ccc;
    border-radius: 15px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

h2 {
    margin: 0;
}

.title,.source{
     height: 30px;
}

.source {
    display: flex;
    padding: 0;
    margin: 0;
    gap: 10px;
}

.source_name {
    width: 20%;
}

.source_url {
    width: 80%;
}

.para {
    display: flex;
    flex-direction: column;
    align-items: flex-start;/*可去掉*/
    gap: 10px;
}

.para-node{
    display: flex;
    align-items: flex-end;
    padding: 0;
    margin: 0;
    gap: 5px;
}

.para-btns {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.add, .del {
    margin: 0;

    width: 23px;
    height: 23px;
    border-radius: 5px;
    border: none;
    color: white;
    background-color: #86a2f0;
    line-height: 1;
    text-align: center;
    font-size: 20px;
    cursor: pointer;
}

.del {
    background-color: rgb(255, 0, 0);
}

.submit {
    width: 100px;
    height: 30px;
    border: none;
    background-color: rgb(109, 144, 235);
    color: white;
    font-size: 16px;
    cursor: pointer;
    border-radius: 5px;
}

.title,.source,.para{
    width: 80%;
}

.title,
.source_name,
.source_url,
textarea {
    border-radius: 13px;
    border: 2px solid #aaa8a8;
    padding: 5px 10px;
    font-family: system-ui, sans-serif;

    &:focus {
        outline: rgb(98, 137, 236) solid 2px;
        border: 1px solid rgb(111, 147, 238);
    }
}