body {
    background-color: #fafafa;
}

.security_banner {
    position: relative;
    height: 0;
    padding-top: 25.208333%;
    overflow: hidden;
    background-color: #020d1d;
}

.security_banner > img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
}

.security_banner_content {
    position: absolute;
    top: 50%;
    left: 6%;
    width: 48%;
    -webkit-transform: translateY(-44%);
    -ms-transform: translateY(-44%);
    transform: translateY(-44%);
}

.security_banner_content h1,
.security_banner_content h2,
.security_banner_content p {
    color: #fff;
    text-shadow: 0 2px 9px rgba(0, 0, 0, 0.45);
}

.security_banner_content h1 {
    font-size: 42px;
    font-weight: bold;
    line-height: 1.3;
}

.security_banner_content h2 {
    margin-top: 17px;
    background: transparent;
    font-size: 23px;
    line-height: 1.45;
}

.security_banner_content p {
    margin-top: 15px;
    font-size: 14px;
    line-height: 1.7;
}

.security_section_body,
.security_card_list,
.security_advantage_list,
.security_scenario_list,
.security_value_list,
.security_faq_list {
    width: 88%;
    max-width: 1202px;
    margin: 0 auto;
}

.security_section_shell {
    width: 100%;
    border-top: 1px solid #4f9de0;
    background-color: #fff;
}

.security_overview .security_section_body,
.security_solution .security_section_body {
    padding: 38px 0 54px;
}

.security_overview .security_section_body p,
.security_solution_intro {
    color: #404040;
    font-size: 16px;
    line-height: 34px;
    text-align: justify;
}

.security_overview .security_section_body p + p {
    margin-top: 16px;
}

.security_features,
.security_scenarios {
    background-color: #fafafa;
}

.security_card_list {
    padding: 38px 0 30px;
}

.security_card {
    float: left;
    width: 44%;
    min-height: 170px;
    margin: 0 2% 24px;
    padding: 26px 2%;
    border: 1px solid #dfeaf1;
    border-top: 3px solid #4f9de0;
    background-color: #fff;
    -webkit-box-sizing: border-box;
    box-sizing: border-box;
}

.security_card > span,
.security_deployment_item > em {
    display: inline-block;
    width: 54px;
    height: 54px;
    margin: 7px 5% 0 1%;
    border-radius: 50%;
    background-color: #edf6fb;
    color: #4f9de0;
    font-size: 18px;
    font-style: normal;
    font-weight: bold;
    line-height: 54px;
    text-align: center;
    vertical-align: top;
}

.security_card > div,
.security_deployment_item > div {
    display: inline-block;
    width: 76%;
    vertical-align: top;
}

.security_card h3,
.security_advantage_item h3,
.security_deployment_item h3,
.security_scenario_item h3 {
    color: #404040;
    font-size: 18px;
    line-height: 28px;
}

.security_card p,
.security_advantage_item p,
.security_deployment_item p,
.security_scenario_item p,
.security_value_item p {
    margin-top: 10px;
    color: #666;
    font-size: 13px;
    line-height: 24px;
}

.security_advantage_list {
    padding: 38px 0 30px;
}

.security_advantage_item {
    float: left;
    width: 29%;
    min-height: 205px;
    margin: 0 0 24px 3%;
    padding: 24px 2%;
    border: 1px solid #e5e5e5;
    background-color: #fff;
    text-align: center;
    -webkit-box-sizing: border-box;
    box-sizing: border-box;
}

.security_advantage_item > span {
    display: inline-block;
    margin-bottom: 11px;
    color: #4f9de0;
    font-size: 20px;
    font-weight: bold;
}

.security_solution_intro {
    margin-bottom: 30px;
    padding: 19px 3%;
    border-left: 3px solid #4f9de0;
    background-color: #f7fbfe;
}

.tom_topology {
    margin-bottom: 30px;
    padding: 34px 3%;
    border: 1px solid #dce8ef;
    background: #fff;
    box-shadow: 0 10px 30px rgba(35, 82, 116, 0.07);
}

.tom_topology_node,
.tom_topology_arrow {
    float: left;
    min-height: 86px;
    text-align: center;
    -webkit-box-sizing: border-box;
    box-sizing: border-box;
}

.tom_topology_node {
    width: 24%;
    padding: 20px 1%;
    border: 1px solid #cfe3ef;
    background-color: #f8fbfd;
}

.tom_topology_core {
    border-color: #4f9de0;
    background-color: #edf6fb;
}

.tom_topology_node strong,
.tom_topology_node span {
    display: block;
}

.tom_topology_node strong {
    color: #286aa1;
    font-size: 18px;
}

.tom_topology_node span {
    margin-top: 9px;
    color: #666;
    font-size: 13px;
}

.tom_topology_arrow {
    width: 14%;
    padding-top: 8px;
    color: #4f9de0;
}

.tom_topology_arrow span,
.tom_topology_arrow b {
    display: block;
}

.tom_topology_arrow span {
    color: #7c8b96;
    font-size: 12px;
}

.tom_topology_arrow b {
    margin-top: 3px;
    font-size: 33px;
    font-weight: normal;
    line-height: 40px;
}

.security_deployment_item {
    float: left;
    width: 47%;
    min-height: 135px;
    margin: 0 1.5%;
    padding: 24px 2%;
    border-top: 2px solid #4f9de0;
    background-color: #fff;
    -webkit-box-sizing: border-box;
    box-sizing: border-box;
}

.security_scenario_list {
    padding: 38px 0 22px;
}

.security_scenario_item {
    float: left;
    width: 29%;
    min-height: 240px;
    margin-left: 3%;
    padding: 25px 2%;
    border-top: 3px solid #4f9de0;
    background-color: #fff;
    box-shadow: 0 8px 26px rgba(35, 82, 116, 0.08);
    -webkit-box-sizing: border-box;
    box-sizing: border-box;
}

.security_scenario_item > span {
    display: inline-block;
    margin-bottom: 12px;
    padding: 3px 10px;
    background-color: #edf6fb;
    color: #3f8ecf;
    font-size: 12px;
}

.security_value_list {
    padding: 0 0 48px;
}

.security_value_item {
    float: left;
    width: 45.5%;
    min-height: 92px;
    margin-left: 3%;
    padding: 21px 2.5%;
    border-left: 3px solid #4f9de0;
    background-color: #f7fbfe;
    -webkit-box-sizing: border-box;
    box-sizing: border-box;
}

.security_value_item strong {
    color: #286aa1;
    font-size: 16px;
}

.security_faq_list {
    float: none;
    padding: 38px 0 48px;
}

.security_faq_list dt {
    margin-top: 16px;
    padding: 17px 22px;
    border-left: 3px solid #4f9de0;
    background-color: #f7fbfe;
    color: #404040;
    font-size: 15px;
    font-weight: bold;
    line-height: 25px;
}

.security_faq_list dt:first-child {
    margin-top: 0;
}

.security_faq_list dt span {
    margin-right: 13px;
    color: #4f9de0;
}

.security_faq_list dd {
    margin: 0;
    padding: 15px 25px 18px 52px;
    border-bottom: 1px solid #e8eef2;
    background-color: #fff;
    color: #666;
    font-size: 14px;
    line-height: 26px;
}

.duoyu {
    clear: both;
    height: 50px;
    background-color: #fafafa;
}

@media screen and (max-width: 768px) {
    .security_banner_content {
        left: 5%;
        width: 52%;
        -webkit-transform: translateY(-38%);
        -ms-transform: translateY(-38%);
        transform: translateY(-38%);
    }

    .security_banner_content h1 {
        font-size: 18px;
    }

    .security_banner_content h2 {
        margin-top: 5px;
        font-size: 11px;
    }

    .security_banner_content p {
        display: none;
    }

    .security_card,
    .security_advantage_item,
    .security_deployment_item,
    .security_scenario_item,
    .security_value_item {
        float: none;
        width: 92%;
        min-height: 0;
        margin: 0 auto 18px;
    }

    .tom_topology_node,
    .tom_topology_arrow {
        float: none;
        width: 100%;
        min-height: 0;
    }

    .tom_topology_arrow {
        padding: 8px 0;
    }

    .tom_topology_arrow b {
        -webkit-transform: rotate(90deg);
        -ms-transform: rotate(90deg);
        transform: rotate(90deg);
    }

    .security_faq_list dd {
        padding-left: 24px;
    }
}