* {
    margin: 0;
    padding: 0;
    text-decoration: none;
    list-style: none;
    transition: all 1s;
}

body {
    background-color: orange;
}

body {
    background-color: rgb(246, 246, 246);
    box-sizing: border-box;
    /* padding: 0 20px; */
}

nav {
    width: 100%;
    position: sticky;
    top: 0px;
    z-index: 5;
    background-color: rgb(246, 246, 246);
}

nav .nav_menu {
    position: absolute;
    background-color: rgba(43, 43, 43, 0.9);
    width: 100%;
    left: 0px;
    top: 0px;
    /* padding: 20px; */
    height: 0px;
    /* height: 375px; */
    overflow: hidden;
    box-sizing: border-box;
}

nav .nav_menu>img {
    width: 20px;
    height: 20px;
    margin-right: 10px;
    position: absolute;
    right: 10px;
}

nav .nav_menu>ul>li {
    line-height: 50px;
    border-bottom: 1px solid #ccc;
}

nav .nav_menu>ul>li:nth-child(2) {
    position: relative;
}

nav .nav_menu>ul>li:nth-child(2) ul {
    position: absolute;
    width: 100%;
    display: none;
    /* height: 0px; */
    overflow: hidden;
}

nav .nav_menu>ul>li:nth-child(2)>ul>li {
    width: 100%;
    border-bottom: 1px solid #ccc;
    background-color: #000;
}

nav .nav_menu>ul>li a {
    color: white;
}

.nav_header {
    width: 100%;
    height: 100px;
    margin: 0px auto;
    padding: 20px 10px;
    box-sizing: border-box;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav_header>div:nth-child(1) {
    font-size: 20px;
/*    line-height: 100px;*/
    text-align: center;
}
.logo {
    height: 40px;
    width: 40px;
    line-height: 40px;
    align-items: center;
}
.nav_header>.nav_input {
    display: flex;
    justify-content: space-around;
}

.nav_header>.nav_input>input {
    height: 20px;
    padding: 3px;
    padding-left: 20px;
    border-radius: 100px;
    border-top-right-radius: 0px;
    border-bottom-right-radius: 0px;
    border: none;
    width: 50%;
}

.nav_header>.nav_input span:nth-child(2) {
    padding: 3px;
    width: 40%;
    box-sizing: border-box;
    margin-left: 2px;
    background-color: #fff;
    font-size: 8px;
    display: flex;
    align-items: center;
    color: rgb(159, 143, 142);
    cursor: pointer;
    position: relative;
}

.nav_header>.nav_input span:nth-child(2)>div {
    width: 90%;
    position: absolute;
    top: 20px;
    background-color: #fff;
    display: none;
}

.nav_header>.nav_input span:nth-child(2)>div>ul>li {
    line-height: 30px;
    border-bottom: 1px solid #ccc;
    text-align: center;
}

.nav_header>.nav_input span:nth-child(2) img {
    width: 10px;
}

.nav_header>.nav_input span:nth-child(3) {
    width: 15%;
    margin-left: 2px;
    height: inherit;
    display: block;
    text-align: center;
    background-color: #fff;
    border-top-right-radius: 100px;
    border-bottom-right-radius: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.nav_header>.nav_input span img {
    width: 10px;
}

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

.nav_header .nav_icon>img {
    width: 30px;
    cursor: pointer;
}

.nav_icon .nav_icons {
    height: 20px;
    width: 20px;
    background-size: cover;
    background-image: url(../image/_购物\ \(1\).png);
    margin-left: 10px;
    position: relative;
}

.nav_icon .nav_icons span {
    position: absolute;
    top: -2px;
    right: -8px;
    font-size: 8px;
    background-color: red;
    color: white;
    padding: 1px 3px;
    border-radius: 10px;
}

.nav {
    width: 100%;
    height: 40px;
    background-color: rgb(29, 112, 186);
    margin: 0px auto;
    display: none;
}

footer {
    width: 100%;
    display: flex;
    flex-direction: column;
    background-color: #fff;
    align-items: center;
}

footer dl {
    padding: 10px 0;
}

footer dd {
    text-align: center;
}


/*  */

section {
    box-sizing: border-box;
    padding: 20px 0;
    /* box-sizing: border-box; */
    width: 100%;
    margin: 0 auto;
    /* display: flex; */
    /* justify-content: space-between; */
    overflow: hidden;
    background-color: #fff;
    padding-bottom: 0;
}

.title {
    color: rgb(29, 112, 186);
    margin-bottom: 30px;
    padding-left: 20px;
}

.com {
    display: flex;
    justify-content: space-between;
    flex-direction: column;
    border-top: 5px solid rgb(29, 112, 186);
    /* border-left: 1px solid #999;
    border-right: 1px solid #999;
    border-bottom: 1px solid #999; */
    box-sizing: border-box;
    padding: 20px;
}

.left {
    width: 100%;
    box-sizing: border-box;
    padding: 0 20px;
}

.c_t {
    color: rgb(29, 112, 186);
    padding-bottom: 20px;
}

.c_t_sm {
    padding-bottom: 10px;
    color: #999;
}

.c_t_sm span {
    color: red;
}

input {
    width: 100%;
    height: 35px;
}

.sti {
    display: block;
    color: red;
    font-size: 12px;
    padding-top: 5px;
}

.sti_div {
    height: 50px;
    /* background-color: pink; */
}

.chbox {
    width: 15px;
    height: 15px;
}

.d_s span {
    color: #999;
    font-size: 14px;
}

button {
    margin-top: 100px;
    color: #fff;
    background-color: rgb(29, 112, 186);
    border: none;
    width: 180px;
    height: 40px;
}

.right {
    margin-top: 30px;
    width: 100%;
    box-sizing: border-box;
    padding: 0 20px;
}

.sti_div div {
    color: #999;
    font-size: 12px;
}

.but1 {
    display: none;
}

.but2 {
    margin-top: 20px;
    margin-bottom: 50px;
}
.lisbtn img {
    width: 20px;
    height: 20px;
    float: right;
    padding-top: 15px;
    transition: .5s;
}
.gocar {
    cursor: pointer;
}