header {
    padding: 0 86px;
    height: 74px;
}

header .header-wrap {
    height: 74px;
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    max-width: 1196px;
    margin: 0 auto;
    padding: 0 15px;
}

header .logo img {
    max-width: 25vw;
}

header .nav-link {
    color: #707b8c;
    line-height: 42px;
    text-transform: uppercase;
    position: relative;
}

header .nav-link:after {
    content: "";
    width: 0;
    height: 2px;
    background-color: #b31b2f;
    display: block;
    position: absolute;
    bottom: 10px;
    left: 50%;
    transform: translateX(-50%);
    margin-top: 7px;
    transition: 0.2s;
    opacity: 0;
}

header .nav-item.active .nav-link,
header .nav-item:hover .nav-link {
    color: #b31b2f;
}

header .nav-item.active .nav-link:after,
header .nav-item:hover .nav-link:after {
    width: 40px;
    opacity: 1;
}

header .btn_login {
    width: 160px;
    height: 42px;
    background-color: #142b4b;
    color: #fff;
    border-radius: 3px;
    margin: 0.5rem auto;
    padding: 0 10px;
    text-align: center;
    margin-left: 42px;
    display: flex;
    justify-content: center;
    align-items: center;
}

header .btn_login .fas {
    margin-right: 5px;
}

header .btn_login .login-link {
    color: #fff;
    font-size: 14px;
    text-transform: uppercase;
    margin-top: 2px;
}

.setop {
    background: #142b4b url(../images/dt_Banner.jpg) no-repeat center;
    background-size: cover;
    /* height:127px; */

}

.setop h1 {
    color: #fff;
    font-size: 30px;
    line-height: 4.25em;
    text-transform: uppercase;
    padding: 0 15px;
    margin-bottom: 0;
}

.btn {
    padding: 0;
    width: 160px;
    height: 48px;
    border-radius: 3px;
    background-color: #b31b2f;
    color: #fff;
    text-align: center;
    line-height: 48px;
    font-size: 16px;
    border: none;
    display: inline-block;
}

.btn:hover {
    color: #fff;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    color: #142b4b;
}

p {
    color: #707b8c;
}

.a_btn {
    display: inline-block;
    width: 160px;
    height: 48px;
    background-color: transparent;
    border: 1px solid #142b4b;
    font-size: 16px;
    border: 1px solid #fff;
    color: #fff;
    border-radius: 3px;
    margin-right: 28px;
    text-align: center;
    line-height: 1;
    display: flex;
    align-items: center;
    justify-content: center;
}

.a_btn:hover,
.a_btn.active {
    background-color: #b31b2f;
    border: 1px solid transparent;
    color: #fff;
}

section .more_btn {
    background-color: #b31b2f;
    border: 1px solid transparent;
    color: #fff;
    margin-top: 30px;
}

section .more_btn:hover {
    color: #fff;
}

section .subtitle {
    font-size: 18px;
    color: #b31b2f;
    line-height: 2.8;
    font-weight: bolder;
}

section {
    padding: 90px 0;
}

section .subtitle {
    font-size: 18px;
    color: #b31b2f;
    line-height: 1;
    font-weight: 500;
    font-weight: bolder;
    margin-bottom: 12px;
}

section .title {
    font-size: 42px;
    line-height: 48px;
    color: #142b4b;
    margin-bottom: 48px;
}

section .title h2 {
    font-size: 42px;
    line-height: 1.14;
    color: #142b4b;
    margin-bottom: .45em;

}

section .title p {
    color: #707b8c;
    font-size: 24px;
    line-height: 1.4;
}

section .desc p {
    font-size: 18px;
    color: #707b8c;
    line-height: 1.6;
}

section .more_btn {
    background-color: #b31b2f;
    border: 1px solid transparent;
    color: #fff;
    margin-top: 30px;
}

section .more_btn:hover {
    color: #fff;
}

section .item {
    display: inline-block;
}

.kefu {
    position: fixed;
    right: 0;
    top: 270px;
    padding: 15px;
    z-index: 99;
}

.kefu-wrap {
    position: relative;
    
}

.kefu .tel {
    display: flex;
    align-items: center;
    position: absolute;
    right: -220px;
    top: 0;
    bottom: 0;
    width: 198px;
    opacity: 0;
    transition: 0.3s;
    background: url(../images/whats_app.gif) no-repeat 0 0 #b31b2f;
    color: #fff;
    z-index: 99999;
    line-height: 24px;
    padding: 0 15px;
}

.kefu:hover .tel,
.kefu .tel:hover {
    opacity: 1;
    right: -15px;
}

/* 导航切换 */
.m-toggle {
    display: none;
    width: 29px;
    height: 29px;
    margin-top: 26px;
}

.menu {
    width: 29px;
    height: 4px;
    background-color: #707b8c;
    position: relative;
    transition: 0.3s;
}

.menu:before {
    content: "";
    width: 29px;
    height: 4px;
    background-color: #707b8c;
    position: absolute;
    transition: 0.3s;
    top: 7px;
    left: 0;
}

.menu:after {
    content: "";
    width: 29px;
    height: 4px;
    background-color: #707b8c;
    position: absolute;
    bottom: 7px;
    transition: 0.3s;
    left: 0;
}

.m-toggle.active .menu {
    background-color: transparent;
}

.m-toggle.active .menu:before {
    transform: rotate(45deg);
    top: 2px;
}

.m-toggle.active .menu:after {
    transform: rotate(-45deg);
    bottom: -2px;
}

/* 小箭头-向右 */
.item_arro {
    width: 6px;
    position: relative;
}

a.readmore {
    text-transform: capitalize;
    color: #b31b2f;
    font-size: 14px;
    border-bottom: 2px solid #b31b2f;
    border-radius: 0;
    transition: 0.5s;
    display: inline-block;
}

.item_arro::before {
    content: "";
    display: block;
    position: absolute;
    width: 6px;
    height: 1px;
    background-color: #142b4b;
    left: 5px;
    top: .4em;
    transform: rotate(45deg);
}

.item_arro::after {
    content: "";
    display: block;
    position: absolute;
    width: 6px;
    height: 1px;
    background-color: #142b4b;
    left: 5px;
    top: .7em;
    transform: rotate(-45deg);
}


ol.breadcrumb {
    max-width: 1174px;
    margin: 0 auto;
    background-color: transparent;
    font-size: 14px;
    padding: .8rem 1rem .8rem 0;
}

.breadcrumb a {
    color: #142B4B;
    font-size: 14px;
}

.breadcrumb a:after {
    content: '/';
    padding: 0 4px;
}

.breadcrumb .active {
    color: #707b8c;
}

.bg_c_title .title {
    position: relative;
}

.bg_c_title .title:after {
    content: '';
    display: block;
    width: 5rem;
    height: 5px;
    background-color: #b31b2f;
    position: relative;
    margin: auto;
    margin-top: .5em;
}