body{
	margin:0;
	width:100%;
	overflow-x:hidden;
	min-width:0;
}
html{
	overflow-x:hidden;
}
.visually-hidden{
	position:absolute;
	width:1px;
	height:1px;
	padding:0;
	margin:-1px;
	overflow:hidden;
	clip:rect(0,0,0,0);
	white-space:nowrap;
	border:0;
}
.index-top-wrap{
	width:100%;
	background:#fff;
}
/* 头部 */
.index-top{
	width:100%;
	min-height:56px;
	height:56px;
	box-sizing:border-box;
	display:flex;
	justify-content:space-between;
	align-items:center;
	position:relative;
	z-index:10001;
	background:#fff;
	padding:0 12px 0 16px;
	gap:12px;
}
.index-top__brand{
	flex:0 0 auto;
	display:flex;
	justify-content:flex-start;
	align-items:center;
	cursor:pointer;
	min-width:0;
}
.index-top__brand img{
	width:140px;
	max-width:46vw;
	height:auto;
	display:block;
}
.index-top__nav{
	display:none;
	align-items:stretch;
	flex:1;
	min-width:0;
	height:85px;
	box-sizing:border-box;
}
.index-top__menu-btn{
	flex:0 0 auto;
	width:44px;
	height:44px;
	margin:0;
	padding:0;
	border:none;
	background:transparent;
	cursor:pointer;
	border-radius:8px;
	display:flex;
	align-items:center;
	justify-content:center;
	-webkit-tap-highlight-color:transparent;
	transition:background .15s ease;
}
.index-top__menu-btn:hover,
.index-top__menu-btn:focus-visible{
	background:rgba(247,148,29,.12);
	outline:none;
}
.index-top__menu-btn:focus-visible{
	box-shadow:0 0 0 2px #fff, 0 0 0 4px #f7941d;
}
.index-top__menu-btn-lines{
	display:block;
	width:22px;
	height:2px;
	background:#1a1a1a;
	border-radius:1px;
	position:relative;
	transition:background .2s ease;
}
.index-top__menu-btn-lines::before,
.index-top__menu-btn-lines::after{
	content:"";
	position:absolute;
	left:0;
	width:22px;
	height:2px;
	background:#1a1a1a;
	border-radius:1px;
	transition:transform .25s ease, top .25s ease;
}
.index-top__menu-btn-lines::before{ top:-7px; }
.index-top__menu-btn-lines::after{ top:7px; }
.index-top__menu-btn.is-open .index-top__menu-btn-lines{
	background:transparent;
}
.index-top__menu-btn.is-open .index-top__menu-btn-lines::before{
	top:0;
	transform:rotate(45deg);
}
.index-top__menu-btn.is-open .index-top__menu-btn-lines::after{
	top:0;
	transform:rotate(-45deg);
}

/* 移动端下拉 */
.index-top__mobile{
	width:100%;
	box-sizing:border-box;
	border-top:1px solid #eee;
	background:#fafafa;
}
.index-top__mobile[hidden]{
	display:none !important;
}
.index-top__mobile-inner{
	padding:8px 0 16px;
	max-height:min(70vh, 520px);
	overflow-y:auto;
	-webkit-overflow-scrolling:touch;
}
.index-top__mobile-link{
	display:block;
	width:100%;
	box-sizing:border-box;
	text-align:left;
	font-size:15px;
	padding:14px 20px;
	margin:0;
	border:none;
	border-bottom:1px solid #eee;
	background:#fff;
	color:#1a1a1a;
	cursor:pointer;
	font-family:inherit;
	line-height:1.3;
	transition:background .15s ease, color .15s ease;
}
.index-top__mobile-link:hover,
.index-top__mobile-link:active{
	background:#fff5eb;
	color:#f7941d;
}
.index-top__mobile-sub{
	border-bottom:1px solid #eee;
	background:#fff;
}
.index-top__mobile-sub summary{
	list-style:none;
}
.index-top__mobile-sub summary::-webkit-details-marker{
	display:none;
}
.index-top__mobile-summary{
	display:flex;
	align-items:center;
	justify-content:space-between;
	padding:14px 20px;
	font-size:15px;
	font-weight:500;
	cursor:pointer;
	color:#1a1a1a;
	transition:background .15s ease;
}
.index-top__mobile-summary::after{
	content:"";
	width:8px;
	height:8px;
	border-right:2px solid #888;
	border-bottom:2px solid #888;
	transform:rotate(45deg);
	margin-top:-4px;
	transition:transform .2s ease;
	flex-shrink:0;
}
.index-top__mobile-sub[open] .index-top__mobile-summary::after{
	transform:rotate(225deg);
	margin-top:2px;
}
.index-top__mobile-sub[open] .index-top__mobile-summary{
	background:#fff5eb;
	color:#f7941d;
}
.index-top__mobile-sublist{
	padding:0 12px 12px 20px;
	display:flex;
	flex-direction:column;
	gap:2px;
}
.index-top__mobile-sublist a{
	display:block;
	padding:10px 12px;
	font-size:14px;
	color:#444;
	text-decoration:none;
	border-radius:6px;
	transition:background .15s ease, color .15s ease;
}
.index-top__mobile-sublist a:hover,
.index-top__mobile-sublist a:active{
	background:rgba(247,148,29,.1);
	color:#f7941d;
}
.index-top__mobile-highlight{
	font-weight:600;
	color:#1a1a1a !important;
}

@media (min-width: 1200px){
	.index-top{
		height:85px;
		min-height:85px;
		justify-content:center;
		padding:0;
		gap:0;
	}
	.index-top__brand{
		width:40%;
		height:85px;
		justify-content:center;
	}
	.index-top__brand img{
		width:179px;
		max-width:none;
		height:44px;
	}
	.index-top__menu-btn{
		display:none;
	}
	.index-top__nav{
		display:flex;
		width:70%;
		height:85px;
	}
	.index-top__mobile{
		display:none !important;
	}
}

.index-top__nav>div:not(.nav-mega-wrap){
	flex:0 0 102px;
	max-width:120px;
	min-width:0;
	height:85px;
	min-height:85px;
	box-sizing:border-box;
	font-size:15px;
	display:flex;
	justify-content:center;
	align-items:center;
	cursor:pointer;
	white-space:nowrap;
	padding:0 4px;
	margin:0;
	line-height:1.2;
	transition:background-color .15s ease,color .15s ease;
}
.index-top__nav>div:not(.nav-mega-wrap):hover{
	background:#f7941d;
	color:#fff;
}
.nav-mega-wrap{
	position:relative;
	flex:0 0 102px;
	max-width:120px;
	min-width:0;
	height:85px;
	min-height:85px;
	box-sizing:border-box;
	z-index:10002;
	padding:0;
	margin:0;
}
.nav-mega-wrap__label{
	width:100%;
	height:100%;
	min-height:85px;
	box-sizing:border-box;
	font-size:15px;
	display:flex;
	justify-content:center;
	align-items:center;
	cursor:pointer;
	white-space:nowrap;
	padding:0 4px;
	margin:0;
	line-height:1.2;
	transition:background-color .15s ease,color .15s ease;
}
.nav-mega-wrap:hover .nav-mega-wrap__label{
	background:#f7941d;
	color:#fff;
}

/* mega 内容仅作克隆源，展示层在父页浮层（见 nav-mega-float.css） */
.nav-mega[hidden]{
	display:none !important;
}