/* ============================================================
   双SMART 九级课程切换器（PC）
   ============================================================ */

/* 首页 cont4：原为固定 1222px 静态图，改为自适应内容 */
.cont4 {
	height: auto !important;
	min-height: 0;
	padding-bottom: 90px;
}

/* 课程页 cont2：白底卡片区域 */
.cont2-main .ddl-levels {
	width: 100%;
}

.ddl-levels {
	position: relative;
	z-index: 2;
	margin: 0 auto;
	width: 100%;
	max-width: 1180px;
}

/* 级别选项卡 */
.ddl-level-tabs {
	display: flex;
	flex-wrap: nowrap;
	justify-content: center;
	list-style: none;
	margin: 0;
	padding: 0;
}
.ddl-level-tabs li {
	flex: 1 1 0;
	min-width: 0;
	height: 52px;
	margin: 0 6px 14px;
	border-radius: 26px;
	background: rgba(255,255,255,.18);
	border: 1px solid rgba(255,255,255,.55);
	color: #fff;
	font-size: 20px;
	font-weight: bold;
	line-height: 50px;
	text-align: center;
	cursor: pointer;
	transition: all .25s;
	user-select: none;
}
.ddl-level-tabs li:hover {
	background: rgba(255,255,255,.35);
}
.ddl-level-tabs li.active {
	background: #fff;
	border-color: #fff;
	color: #07A8F5;
	box-shadow: 0 6px 16px rgba(0,0,0,.18);
}

/* 课程页是浅色背景，选项卡改为浅底蓝字 */
.cont2-main .ddl-level-tabs li,
.ddl-levels[data-context="course"] .ddl-level-tabs li {
	background: #EAF6FF;
	border-color: #BFE3FF;
	color: #07A8F5;
}
.ddl-levels[data-context="course"] .ddl-level-tabs li:hover {
	background: #D6EDFF;
}
.ddl-levels[data-context="course"] .ddl-level-tabs li.active {
	background-image: linear-gradient(90deg,#61C8FC,#07ABFF);
	border-color: transparent;
	color: #fff;
}

/* 面板 */
.ddl-level-panels {
	margin-top: 30px;
}
.ddl-panel {
	display: none;
	background: #fff;
	border-radius: 12px;
	padding: 30px 40px 34px;
	box-shadow: 0 10px 30px rgba(7,120,200,.18);
	color: #303030;
	text-align: left;
}
.ddl-panel.active {
	display: block;
	animation: ddlFade .3s ease;
}
@keyframes ddlFade {
	from { opacity: 0; transform: translateY(8px); }
	to   { opacity: 1; transform: translateY(0); }
}
.ddl-panel-head {
	display: flex;
	align-items: center;
	padding-bottom: 18px;
	border-bottom: 1px solid #EAF2F8;
	margin-bottom: 22px;
}
.ddl-panel-head img {
	width: 46px;
	height: 46px;
	margin-right: 14px;
}
.ddl-panel-head h4 {
	font-size: 24px;
	line-height: 1;
	color: #07A8F5;
	font-weight: bold;
}
.ddl-panel-grid {
	list-style: none;
	margin: 0;
	padding: 0;
	display: flex;
	flex-wrap: wrap;
}
.ddl-panel-grid li {
	width: 50%;
	box-sizing: border-box;
	padding: 9px 20px 9px 0;
	font-size: 16px;
	line-height: 26px;
	color: #444;
	display: flex;
}
.ddl-panel-grid li strong {
	flex: 0 0 118px;
	color: #07A8F5;
	font-weight: bold;
}

/* 首页课程页通用：cont4 内面板阴影适配深色背景 */
@media screen and (max-width: 1280px) {
	.ddl-panel-grid li strong { flex: 0 0 108px; }
}