:root{--rgb-color-primary:24,128,255}
html{line-height:1.5;-ms-text-size-adjust:100%;-webkit-text-size-adjust:100%;box-sizing:border-box;font-size:16px;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Arial;color:#fff;-webkit-font-smoothing:subpixel-antialiased;-moz-osx-font-smoothing:grayscale;font-weight:400;-webkit-tap-highlight-color:transparent;scroll-behavior:smooth;scroll-padding-top:70px}
body,dd,dl,figure,form,h1,h2,h3,h4,h5,h6,input,menu,p{margin:0}
button,input,ol,textarea,ul{margin:0;padding:0}
:after,:before,a,abbr,address,article,aside,body,button,dd,details,div,dl,dt,figcaption,figure,footer,form,h1,h2,h3,h4,h5,h6,header,img,input,label,li,main,menu,nav,ol,p,picture,section,select,span,strong,summary,table,td,textarea,th,tr,ul{box-sizing:border-box}
ol li,ul li{list-style:none}
picture{font-size:0;display:block}
a{background-color:transparent;text-decoration:none;-webkit-text-decoration-skip:objects;transition:all ease .15s;color:inherit}
a:hover{outline:0;text-decoration:none;color:rgb(var(--rgb-color-primary))}
a,button,input[type=button],input[type=reset],input[type=submit],summary{cursor:pointer}
audio,video{display:inline-block}
img{border-style:none;max-width:100%}
textarea{resize:vertical}
button,input,select,textarea{font-family:inherit;font-size:100%;line-height:1.15}
a,a:focus,button,button:focus,input,input:focus,optgroup,optgroup:focus,select,select:focus,summary,summary:focus,textarea,textarea:focus{outline:0}

/*return top*/
.return-top{width:70px;height:70px;background:rgba(24,128,255,.5);position:fixed;bottom:1%;right:10px;cursor:pointer;display:none;z-index:1;color:#fff;font-size:12px}
.return-top:hover{background:rgba(24,128,255,.86);color:#fff}
.return-top svg{margin-bottom:5px}
.return-top.actived{display:inline-flex;flex-direction:column;justify-content:center;align-items:center}

/*flex*/
.flex{display:flex}
.inline-flex{display:inline-flex}
.flex-direction-row{flex-direction:row}
.flex-direction-column{flex-direction:column}
.flex-wrap-nowrap{flex-wrap:nowrap}
.flex-wrap-wrap{flex-wrap:wrap}
.flex-wrap-reverse{flex-wrap:wrap-reverse}
.flex-justify-start{justify-content:flex-start}
.flex-justify-end{justify-content:flex-end}
.flex-justify-center{justify-content:center}
.flex-justify-around{justify-content:space-around}
.flex-justify-between{justify-content:space-between}
.flex-align-start{align-items:flex-start}
.flex-align-end{align-items:flex-end}
.flex-align-center{align-items:center}


.btn-group{display:flex;justify-content:center;align-items:center;gap:10px;flex-wrap:wrap;font-size:0}
.default-btn{display:inline-block;position:relative;padding:14px 24px;border-radius:999px;font-size:16px;font-weight:600;line-height:1;text-decoration:none;white-space:nowrap;overflow:hidden;background:#1880ff;color:#fff}
.default-btn::before{content:"";display:block;position:absolute;left:0;right:0;top:0;bottom:0;width:100%;height:100%;border:1px solid #1880ff;border-radius:999px}
.default-btn:hover{color:#fff;transform:translateY(-5px);-webkit-filter:brightness(1.15);filter:brightness(1.15)}
.default-btn.btn-lg{padding:20px 50px}

body{background:#111827}
.container{max-width:1230px;margin:0 auto;padding:0 15px;position:relative;z-index:0}
.module-title{font-size:48px;font-weight:600;text-align:center;margin:0 0 20px}
.module-title:not(:has(+ .module-desc)){margin-bottom:48px}
.module-desc{font-size:28px;text-align:center;margin-bottom:36px}
body.header-sticky header{position:sticky;left:0;top:0}
header{position:relative;width:100%;height:80px;background:rgba(0,0,0,.75);backdrop-filter:blur(10px);z-index:999}
header .container{display:flex;justify-content:space-between;align-items:center;gap:10px;height:80px}
header .nav-logo{flex-shrink:0;font-size:22px;font-weight:700;color:rgb(var(--rgb-color-primary))}
header .nav-logo span{font-size:13px}
header .nav-main{display:flex;justify-content:center;align-items:center;transition:all ease .3s;padding: 0 10px}
header .nav-main ul{display:flex;align-items:center;justify-content:center;flex-wrap: wrap;gap:20px;list-style:none;margin:0;padding:0}
header .nav-main ul li{position:relative}
header .nav-main ul li .nav-link{text-decoration:none;font-size:16px;padding:0;display:inline-block;border-bottom:2px solid transparent;white-space: nowrap}
header .nav-main ul li.has-submenu:focus-within>.submenu,header .nav-main ul li.has-submenu:hover>.submenu{display:block}
header .nav-main ul .submenu{display:none;position:absolute;left:50%;top:100%;transform:translateX(-50%);min-width:auto;background:#fff;box-shadow:0 4px 16px rgba(0,0,0,.15);border-radius:6px;padding:8px 0;z-index:10}
header .nav-main ul .submenu li{margin:0;text-align:left}
header .nav-main ul .submenu li .nav-link{display:block;padding:8px 24px;font-size:15px;border-bottom:none;transition:all ease .2s}
header .nav-main ul .submenu li .nav-link:hover{background:#f2f8ff;color:rgb(var(--rgb-color-primary))}
footer{text-align:center;padding:25px 0;background:#000}
@media screen and (max-width:769px){
	header{height:64px}
	header .container{height:64px;padding-right:60px}
	header .hamburger{position:absolute;display:block;top:50%;right:20px;transform: translateY(-50%);cursor:pointer;caret-color:transparent}
	header .hamburger span{display:block;width:25px;height:3px;background:#fff;margin:5px 0;transition:all .3s}
	header .hamburger.actived span:nth-child(1){transform:rotate(-45deg) translate(-5px,6px)}
	header .hamburger.actived span:nth-child(2){opacity:0}
	header .hamburger.actived span:nth-child(3){transform:rotate(45deg) translate(-5px,-6px)}
	header .nav-main{position:fixed;left:0;top:0;bottom:0;width:80%;height:100vh;transform:translateX(-100%);padding:30px 20px 20px 40px;background:#fff;box-shadow:2px 0 5px rgba(0,0,0,.1);overflow-y:scroll;align-items:start;justify-content:start}
	header .nav-main.actived{transform:translateX(0)}
	header .nav-main ul{flex-direction:column;align-items:flex-start}
	header .nav-main ul li .nav-link{color:#000}
	header .nav-main ul .submenu{position:static;transform:none;box-shadow:none;display:none}
	header .nav-main ul li.has-submenu:focus-within>.submenu,header .nav-main ul li.has-submenu:hover>.submenu{display:block}
}