p,
ul,
h1,
h2,
h3 {
    margin: 0;
    padding: 0;
}

li {
    list-style-type: none;
}


/* 字重 */

.fw {
    font-weight: bold;
}

.fwno {
    font-weight: normal;
}

.fw400 {
    font-weight: 400;
}

.fw500 {
    font-weight: 500;
}

.fw800 {
    font-weight: 800;
}


/* 转块 */

.db {
    display: block;
}


/* 弹性盒子 */

.df {
    display: flex;
}

.flex1 {
    flex: 1;
}

.df_co {
    flex-direction: column;
}

.flex_wrap {
    flex-wrap: wrap;
}


/* 垂直居中 */

.align_c {
    align-items: center;
}

.align_center {
    display: flex;
    align-items: center;
}


/* 水平居中 */

.justify_c {
    justify-content: center;
}

.justify_center {
    display: flex;
    justify-content: center;
}

.al_sp {
    align-items: space-between;
}


/* 水平两端对齐 */

.justify_between {
    display: flex;
    justify-content: space-between;
}


/* 水平垂直居中 */

.center {
    display: flex;
    align-items: center;
    justify-content: center;
}


/* 宽度100% */

.w100 {
    width: 100%;
}


/* 高度100% */

.h100 {
    height: 100%;
}


/* 定位 */

.fixed {
    position: fixed;
}

.relative {
    position: relative;
}

.absolute {
    position: absolute;
}


/* 文字居中 */

.text_center {
    text-align: center;
}

input {
    border: 0;
    outline: none;
    margin: 0;
    padding: 0;
}

input::-webkit-outer-spin-button,
input::-webkit-inner-spin-button {
    -webkit-appearance: none;
}

input[type="number"] {
    -moz-appearance: textfield;
}