/* 导航 Mega 下拉 — 全宽面板：左侧分类 + 右侧分栏 */
.nav-mega.nav-mega--floating {
	position: fixed !important;
	z-index: 2147483646 !important;
	margin: 0;
	padding: 0;
	background: var(--color-bg-card, #fff);
	color: var(--color-text, #0f2744);
	border-radius: 0;
	box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12), 0 2px 8px rgba(0, 0, 0, 0.06);
	pointer-events: auto;
	isolation: isolate;
	overflow: hidden;
}

.nav-mega.nav-mega--floating::before {
	content: "";
	position: absolute;
	left: 0;
	right: 0;
	top: -24px;
	height: 24px;
	pointer-events: auto;
}

/* 全宽双栏面板 */
.nav-mega.nav-mega--floating.nav-mega--panel {
	left: 0 !important;
	right: 0 !important;
	width: 100% !important;
	min-width: 0 !important;
	max-width: none !important;
	max-height: min(72vh, 560px);
}

.nav-mega.nav-mega--floating.nav-mega--panel.nav-mega--about {
	max-height: min(50vh, 380px);
}

.nav-mega__inner {
	padding: 0;
}

.nav-mega__layout {
	display: flex;
	min-height: 280px;
	max-height: inherit;
}

.nav-mega__sidebar {
	flex: 0 0 240px;
	background: #f3f5f7;
	border-right: 1px solid var(--color-border, #e5e8eb);
	overflow-y: auto;
	overscroll-behavior: contain;
}

.nav-mega__cats {
	list-style: none;
	margin: 0;
	padding: 8px 12px 8px 16px;
}

.nav-mega__cats > li {
	margin: 0;
}

.nav-mega__cat {
	display: block;
	width: 100%;
	box-sizing: border-box;
	padding: 14px 16px 14px 24px;
	border: none;
	border-left: 3px solid transparent;
	background: transparent;
	color: var(--color-text, #0f2744);
	font-size: 14px;
	font-weight: 500;
	line-height: 1.4;
	text-align: left;
	cursor: pointer;
	font-family: inherit;
	transition: background 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}

.nav-mega__cat:hover,
.nav-mega__cat.is-active {
	background: #fff;
	color: var(--color-primary, #1677ff);
	border-left-color: var(--color-primary, #1677ff);
}

.nav-mega__panels {
	flex: 1 1 auto;
	min-width: 0;
	padding: 28px 40px 32px;
	background: #fafbfc;
	overflow-y: auto;
	overscroll-behavior: contain;
}

.nav-mega__panel {
	display: none;
}

.nav-mega__panel.is-active {
	display: block;
	animation: nav-mega-fade 0.2s ease;
}

@keyframes nav-mega-fade {
	from { opacity: 0; transform: translateY(4px); }
	to { opacity: 1; transform: none; }
}

.nav-mega__panel-title {
	margin: 0 0 20px;
	font-size: 26px;
	font-weight: 700;
	line-height: 1.25;
	color: var(--color-text, #0f2744);
}

.nav-mega__grid {
	display: grid;
	grid-template-columns: repeat(3, minmax(0, 1fr));
	gap: 12px 28px;
}

.nav-mega--about .nav-mega__grid {
	grid-template-columns: repeat(2, minmax(0, 1fr));
	max-width: 720px;
}

.nav-mega__card {
	display: block;
	padding: 12px 16px;
	text-decoration: none;
	color: inherit;
	border-radius: 6px;
	transition: background 0.18s ease;
}

.nav-mega__card:hover {
	background: rgba(22, 119, 255, 0.06);
}

.nav-mega__card-title {
	display: block;
	font-size: 15px;
	font-weight: 600;
	color: var(--color-text, #0f2744);
	line-height: 1.45;
	margin-bottom: 4px;
}

.nav-mega__card:hover .nav-mega__card-title {
	color: var(--color-primary, #1677ff);
}

.nav-mega__card-arrow {
	color: var(--color-primary, #1677ff);
	font-weight: 400;
	margin-left: 2px;
}

.nav-mega__card-desc {
	display: block;
	font-size: 13px;
	line-height: 1.55;
	color: var(--color-text-secondary, #5c6b7a);
}

@media (max-width: 1024px) {
	.nav-mega__sidebar {
		flex-basis: 200px;
	}
	.nav-mega__grid {
		grid-template-columns: repeat(2, minmax(0, 1fr));
	}
	.nav-mega__panels {
		padding: 20px 24px 24px;
	}
}

@media (max-width: 768px) {
	.nav-mega__layout {
		flex-direction: column;
		min-height: 0;
	}
	.nav-mega__sidebar {
		flex: 0 0 auto;
		border-right: none;
		border-bottom: 1px solid var(--color-border, #e5e8eb);
		max-height: 160px;
	}
	.nav-mega__cats {
		display: flex;
		flex-wrap: wrap;
		gap: 4px;
		padding: 8px 12px;
	}
	.nav-mega__cats > li {
		flex: 0 0 auto;
	}
	.nav-mega__cat {
		padding: 8px 14px;
		border-left: none;
		border-radius: 4px;
		font-size: 13px;
	}
	.nav-mega__cat.is-active,
	.nav-mega__cat:hover {
		border-left: none;
	}
	.nav-mega__grid {
		grid-template-columns: 1fr;
	}
}

/* 旧版纵向列表（兼容） */
.nav-dropdown__list,
.nav-dropdown__sub {
	list-style: none;
	margin: 0;
	padding: 0;
}

.nav-dropdown__list > li > a,
.nav-dropdown__sub a {
	display: block;
	padding: 10px 18px;
	font-size: 14px;
	line-height: 1.4;
	color: var(--color-text, #0f2744);
	text-decoration: none;
}