.main {
    padding: 3.75rem 7.5rem;
    background-color: transparent;
}

.contact_title h2 {
    font-size: 1.875em;
    font-weight: bold;
    color: #333333;
    line-height: 1;
    margin-bottom: 2rem;
}

.contact_title span {
    font-size: 1em;
    color: #999999;
    line-height: 1;
    margin-top: -1.1875rem;
    margin-bottom: 2rem;
    display: block;
}

.contact_title p {
    font-size: .875em;
    font-family: Microsoft YaHei;
    font-weight: 400;
    color: #666666;
    line-height: 1.875rem;
    display: block;
    margin-bottom: 1.75rem;
}

.contact_title strong {
    font-size: .875em;
    font-weight: bold;
    line-height: 1;
    color: #333333;
    margin-bottom: 1.75rem;
}

.contact_flex_tab {
    display: flex;
    justify-content: space-between;
    overflow: hidden;
    margin-bottom: 4.1875rem;
}

.flex_item {
    /* max-width: 8.125rem; */
    text-align: center;
    flex: 1;
    position: relative;
}

.flex_item::after {
    content: '';
    display: block;
    position: absolute;
    top: .625rem;
    right: 0;
    width: .0625rem;
    height: 5.375rem;
    z-index: 1;
    background: #ECEFF4;
}

.flex_item:last-child::after {
    display: none;
}

.flex_item_icon {
    margin-bottom: 1.25rem;
    height: 1.875rem;
}

.flex_item_title {
    margin-bottom: .625rem;
    line-height: 1;
}

.flex_item_text {
    font-size: .875em;
    color: #666666;
    line-height: 1.2;
}

.branches {
    display: flex;
    justify-content: space-between;
    align-content: space-between;
    flex-wrap: wrap;
    padding: 1.875rem 2.5rem 0;
    background: #ECEFF4;
    position: relative;
    z-index: 1;
}

.branches_item {
    width: calc((100% - 18rem) / 4);
    margin-bottom: 2.3125rem;
    margin-right: 6rem;
}

.branches_item:nth-child(4n) {
    margin-right: 0;
}

.branches_city {
    font-size: .875em;
    font-weight: bold;
    line-height: 1;
    color: #333333;
    margin-bottom: 1rem;
    position: relative;
}

.branches_city::after {
    content: '';
    display: block;
    position: absolute;
    left: -0.6875rem;
    top: 50%;
    transform: translateY(-50%) translateX(-100%);
    z-index: 1;
    width: .5rem;
    height: .5rem;
    border-radius: 100%;
    background-color: #28399C;
}

.branches_address {
    font-size: .875em;
    color: #333333;
    line-height: 1.5rem;
}

.cooperation {
    padding: 5.4375rem 7.5rem 3.75rem;
    background-color: #28399C;
    margin-top: -6.5rem;
    position: relative;
    z-index: 0;
}

.cooperation_form {
    width: 27.5rem;
}

.coo_input {
    height: 3.125rem;
    line-height: 3.125rem;
    background: #1E2C7B;
    border: none;
    padding: 0 1.25rem;
    color: #CCD0E9;
    margin-bottom: .625rem;
}

.coo_input::-webkit-input-placeholder {
    color: #CCD0E9;
}

.coo_textarea {
    background: #1E2C7B;
    border: none;
    padding: .9375rem 1.25rem;
    color: #CCD0E9;
    margin-bottom: .625rem;
    min-height: 5.625rem;
    resize: none;
}

.coo_textarea::-webkit-input-placeholder {
    color: #CCD0E9;
}

.coo_btn {
    width: 100%;
    height: 3.125rem;
    line-height: 3.125rem;
    background: #FFFFFF;
    border: none;
    font-size: 1.25em;
    border-radius: 0;
    color: #28399C;
}

.layui-btn:hover {
    color: #28399C;
}

.problem-list li {
    margin-bottom: .0625rem;
}

.problem-top {
    position: relative;
    z-index: 2;
    border-radius: .25rem;
    height: 4.5rem;
    background-color: #eaeaea;
    display: flex;
    align-items: center;
    overflow: hidden;
    cursor: pointer;
}

.problem-top:before {
    content: "";
    width: 100%;
    height: 0;
    background: #4A5BBA;
    position: absolute;
    left: 0;
    bottom: 0;
    transition: 0.45s;
    z-index: -1;
}

.problem-top:hover span {
    color: #fff;
}

.problem-top.active span {
    color: #fff;
}

.problem-top:hover:before,
.problem-top.active:before {
    height: 100%;
    bottom: auto;
    top: 0;
}

.problem-top:hover b,
.problem-top.active b {
    color: #fff;
}

.problem-top:hover b:before,
.problem-top.active b:before {
    background: rgba(255, 255, 255, 0.2);
}

.problem-top:hover em:before,
.problem-top.active em:before,
.problem-top:hover em:after,
.problem-top.active em:after {
    background: #eaeaea;
}

.problem-top.active em:after {
    opacity: 0;
    visibility: hidden;
    transform: translateY(.875rem);
}

.problem-top b {
    display: block;
    position: relative;
    z-index: 3;
    width: 3.0625rem;
    height: 4.5rem;
    line-height: 4.5rem;
    text-align: center;
    border-radius: .25rem 1.25rem 1.25rem .25rem;
    color: #333333;
    font-size: 1rem;
    overflow: hidden;
    flex-shrink: 0;
    transition: 0.38s;
}

.problem-top b:before {
    position: absolute;
    right: 0;
    top: 50%;
    margin-top: -2.875rem;
    z-index: -1;
    content: "";
    width: 5.75rem;
    height: 5.75rem;
    border-radius: 50%;
    background: #eaeaea;
    transition: 0.42s;
}

.problem-top span {
    display: block;
    margin-left: 1.125rem;
    margin-right: 4.375rem;
    color: #333333;
    font-size: 1.125rem;
    flex: 1;
}

.problem-top em {
    display: block;
    position: absolute;
    right: 2.25rem;
    top: 50%;
    margin-top: -0.4375rem;
    width: .875rem;
    height: .875rem;
}

.problem-top em:before {
    position: absolute;
    left: 0;
    top: .375rem;
    content: "";
    width: 100%;
    height: .125rem;
    border-radius: .0625rem;
    background: #cccccc;
    transition: 0.38s;
}

.problem-top em:after {
    position: absolute;
    left: .375rem;
    top: 0;
    content: "";
    width: .125rem;
    height: 100%;
    border-radius: .0625rem;
    background: #cccccc;
    transition: 0.38s;
}

.proble-text {
    padding: 2.25rem 1.75rem;
    background: #ffffff;
    margin-top: -0.375rem;
    border-radius: 0 0 .25rem .25rem;
    display: flex;
    display: none;
}

.proble-text span {
    display: block;
    color: #333333;
    font-size: 1rem;
    line-height: 2;
    flex-shrink: 0;
}

.proble-wr {
    display: flex;
}

.proble-info {
    flex: 1;
    /* margin-left: .625rem; */
    padding-bottom: 0;
}

.proble-info p {
    margin-bottom: .875rem;
    color: #333;
    font-size: 1em;
    line-height: 1.5625rem
}

.proble-info span {
    color: inherit;
    font-size: inherit;
}

.proble-info p:last-child {
    margin-bottom: 0;
}

@media screen and (max-width: 48rem) {
    .banner {
        margin-top: 3.75rem;
    }

    .main {
        padding: 2.5rem 1.25rem;
    }

    .cooperation {
        padding: 2.5rem 1.25rem;
        margin-top: 0;
    }

    .contact_flex_tab {
        flex-wrap: wrap;
    }

    .flex_item {
        width: calc((100% - 5.625rem) / 2);
    }

    .flex_item:nth-child(1),
    .flex_item:nth-child(2) {
        margin-bottom: 1.875rem;
    }

    .flex_item::after {
        display: none;
    }

    .branches_item {
        width: calc((100% - 2.8125rem) / 2);
        margin-right: 2.8125rem;
    }

    .branches_item:nth-child(2n) {
        margin-right: 0;
    }

    .cooperation_form {
        width: 50%;
    }
}

@media screen and (max-width: 35rem) {
    .contact_title h2 {
        font-size: 1.5em;
    }

    .cooperation .contact_title p {
        max-width: 100% !important;
    }

    .cooperation_form {
        width: 100%;
    }

    .flex_item {
        flex: auto;
    }
}

@media screen and (max-width: 64rem) {
    .cooperation .contact_title p {
        max-width: 20rem !important;
    }
}