:root {
    --main-color: #c1cfdf;
    --bg-second-color: #efefef;
    --bg-third-color: #f9f9f9;
    --text-main-color: #666;
    --text-second-color: #999;
    --text-third-color: #333;
}
body {
    font-size: 16px;
}
.bg-main {
    background: var(--main-color);
}
.bg-sub {
    background: var(--bg-second-color);
}
._container {
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
}
@media screen and (max-width: 1024px) {
    ._container {
        padding-left: 20px;
        padding-right: 20px;
    }
}

h1 {
    font-size: 32px;
}

h2 {
    font-size: 24px;
}

h3 {
    font-size: 20px;
}

h4 {
    font-size: 18px;
}

h5 {
    font-size: 16px;
}

h1,h2,h3,h4,h5 {
    color: var(--text-third-color);
}

p  {
    font-size: 14px;
    color: var(--text-main-color);
}

.text-main {
    color: var(--text-main-color);
}
.text-second {
    color: var(--text-second-color);
}
.text-third {
    color: var(--text-third-color);
}

.nav {
    position: relative;
    gap: 75px;
}
.nav a {
    color: #333;
    padding: 0;
    font-size: 20px;
}
@media screen and (max-width: 1200px) {
    .nav {
        gap: 30px;
    }
}
@media screen and (max-width: 768px) {
    .nav {
        gap: 20px;
    }
}
header {
    height: 75px;
}
header .logo {
    width: 185px;
    margin-right: 55px;
    position: relative;
    z-index: 99;
}
header .logo .pic {
    position: absolute;
    top: 0;
    left: 0;
    background-color: var(--main-color);
    padding: 0 20px;
    height: 180px;
    border-bottom-right-radius: 99px;
    border-bottom-left-radius: 99px;
}
header .nav > li > a {
    height: 75px;
    line-height: 75px;
}
header .nav li {
    position: relative;
    text-align: center;
}
header .nav ul {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    z-index: 99;
    width: 130%;
    background: var(--main-color);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s;
}
header .nav ul li {
    padding: 5px 0;
    transition: all 0.3s;
}
header .nav ul li:hover {
    background: var(--bg-second-color);
}
header .nav li:hover > ul {
    opacity: 1;
    visibility: visible;
}
header .nav ul li a {
    font-size: 16px;
}
@media screen and (max-width: 768px) {
    header .nav a {
        height: auto;
        line-height: normal;
    }
}

header .wap_logo {
    height: 60px;
}
header .wap_menu_btn {
    width: 30px;
    position: relative;
}
header .wap_menu_btn span {
    display: block;
    background: #fff;
    width: 100%;
    height: 3px;
    margin-top: 4px;
    transition: transform 0.3s;
}
header .wap_menu_btn.active span {
    position: absolute;
    top: 50%;
    left: 50%;
    margin: 0;
}
header .wap_menu_btn.active span:first-child {
    transform: translate(-50%,-50%) rotate(45deg);
}
header .wap_menu_btn.active span:last-child {
    transform: translate(-50%,-50%) rotate(-45deg);
}
header .wap_menu_btn.active span:nth-child(2) {
    display: none;
}

header .wap_menu {
    position: absolute;
    top: -100%;
    left: 0;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s;
    width: 100%;
    background: #fff;
    z-index: 99;
    padding: 0 20px;
    box-shadow: 0 25px 50px -12px rgba(0,0,0,0.25);
}
header .wap_menu.active {
    top: 75px;
    opacity: 1;
    visibility: visible;
}
header .wap_menu a {
    display: block;
    padding: 5px 0;
}

footer {
    padding-top: 95px;
    padding-bottom: 55px;
}
footer .nav {
    margin-bottom: 60px;
    gap: 60px;
}
footer .qrcode {
    gap: 60px;
    margin-bottom: 45px;
}
footer .infos p {
    color: #999;
    font-size: 16px;
    margin: 0;
}
footer .infos p:nth-child(1) {
    color: #333;
    font-size: 20px;
    margin-bottom: 15px;
}
footer .infos p:nth-child(2) {
    margin-bottom: 45px;
}
@media screen and (max-width: 1200px) {
    footer {
        padding: 30px 0;
    }
    footer .nav {
        margin-bottom: 30px;
        gap: 10px;
    }
    footer .nav a {
        font-size: 16px;
    }
    footer .infos p:nth-child(2) {
        margin-bottom: 30px;
    }
}

.section_title {
    margin-bottom: 45px;
    text-align: center;
}
.section_title.left {
    text-align: left;
}
.section_title .title_withline {
    position: relative;
    width: max-content;
    margin: 0 auto;
    padding: 0 60px;
    color: #333;
}
.section_title .title_withline::before, .section_title .title_withline::after {
    position: absolute;
    top: 50%;
    content: '';
    width: 50px;
    height: 1px;
    border-top: 1px solid #000;
    transform: translateY(-50%);
}
.section_title .title_withline::before {
    left: 0;
}
.section_title .title_withline::after {
    right: 0;
}
.section_title .subtitle {
    color: #999;
    text-transform: uppercase;
}