/* ============================================
   PC端样式 - project.css
   常规PC端样式写在此文件
   ============================================ */

/* ---------- 头部导航 ---------- */
.header {
	position: fixed;
	top: 0;
	left: 0;
	width: 100%;
	height: 140px;
	background: #fff;
	z-index: 1000;
	box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.header-main {
	max-width: 1440px;
	width: 95%;
	margin: 0 auto;
	height: 100%;
	display: flex;
	align-items: center;
	justify-content: space-between;
}

/* Logo样式 */
.logo a {
	display: block;
	text-decoration: none;
}

.logo img {
	width: auto;
}

/* PC导航菜单 */
.nav-pc {
	flex: 1;
	display: flex;
	justify-content: right;
	margin-right: 40px;
}

.nav-list {
	display: flex;
	list-style: none;
	gap: 60px;
}

.nav-item {
	position: relative;
}

.nav-link {
	display: block;
	padding: 10px 0;
	font-size: 18px;
	font-weight: bold;
	color: #333;
	text-decoration: none;
	transition: color 0.3s ease;
	position: relative;
}

.nav-link:hover,
.nav-link.active {
	color: #1d41af;
}

/* 下拉菜单 */
.has-dropdown .nav-link .arrow {
	display: inline-block;
	width: 0;
	height: 0;
	border-left: 4px solid transparent;
	border-right: 4px solid transparent;
	border-top: 4px solid #333;
	margin-left: 6px;
	vertical-align: middle;
	transition: transform 0.3s ease;
}

.has-dropdown:hover .nav-link .arrow {
	transform: rotate(180deg);
	border-top-color: #1d41af;
}

.dropdown-menu {
	position: absolute;
	top: 100%;
	left: 50%;
	transform: translateX(-50%);
	background: #fff;
	min-width: 140px;
	box-shadow: 0 5px 20px rgba(0, 0, 0, 0.15);
	border-radius: 4px;
	opacity: 0;
	visibility: hidden;
	transition: all 0.3s ease;
	margin-top: 48px;
	padding: 0;
	overflow: hidden;
}

.dropdown-menu::before {
	content: '';
	position: absolute;
	top: -58px;
	left: 50%;
	transform: translateX(-50%);
	border-left: 10px solid transparent;
	border-right: 10px solid transparent;
	border-bottom: 10px solid #fff;
}

/* 连接导航和菜单的透明区域，保持hover状态 */
.has-dropdown::after {
	content: '';
	position: absolute;
	top: 100%;
	left: 0;
	width: 100%;
	height: 48px;
	background: transparent;
	z-index: 99;
}

.has-dropdown:hover .dropdown-menu {
	opacity: 1;
	visibility: visible;
}

.dropdown-menu li {
	list-style: none;
	border-bottom: 1px solid #ddd;
}

.dropdown-menu li:last-child {
	border-bottom: none;
}

.dropdown-menu li a {
	display: block;
	padding: 12px 20px;
	font-size: 14px;
	color: #333;
	text-decoration: none;
	transition: color 0.3s ease;
	text-align: center;
}

.dropdown-menu li a:hover {
	color: #1e3fb0;
}

/* 语言切换 */
.lang-switch {
	display: flex;
	align-items: center;
	gap: 5px;
	margin-left: 20px;
	font-size: 18px;
}

/* 移动端语言切换默认隐藏 */
.lang-switch-mobile {
	display: none;
}

.lang-link {
	color: #333;
	text-decoration: none;
	transition: color 0.3s ease;
}

.lang-link:hover,
.lang-link.active {
	color: #1d41af;
}

.lang-separator {
	color: #999;
}

/* 搜索图标 */
.search-box {
	margin-left: 20px;
}

.search-icon {
	display: block;
	width: 24px;
	height: 24px;
	opacity: 0.7;
	transition: opacity 0.3s ease;
}

.search-icon:hover {
	opacity: 1;
}

.search-icon img {
	width: 100%;
	height: 100%;
}

/* 搜索弹窗 */
.search-popup {
	position: absolute;
	top: 140px;
	left: 0;
	width: 100%;
	background: #fff;
	box-shadow: 0 5px 20px rgba(0, 0, 0, 0.15);
	padding: 30px 0;
	opacity: 0;
	visibility: hidden;
	transform: translateY(-20px);
	transition: all 0.3s ease;
	z-index: 999;
}

.search-popup.active {
	opacity: 1;
	visibility: visible;
	transform: translateY(0);
}

.search-popup-inner {
	max-width: 800px;
	width: 90%;
	margin: 0 auto;
	display: flex;
	align-items: center;
	gap: 15px;
	position: relative;
}

.search-input {
	flex: 1;
	height: 50px;
	padding: 0 20px;
	border: 2px solid #ddd;
	border-radius: 4px;
	font-size: 16px;
	transition: border-color 0.3s ease;
}

.search-input:focus {
	border-color: #1e3fb0;
	outline: none;
}

.search-btn {
	height: 50px;
	padding: 0 40px;
	background: #1e3fb0;
	color: #fff;
	border: none;
	border-radius: 4px;
	font-size: 16px;
	cursor: pointer;
	transition: background 0.3s ease;
}

.search-btn:hover {
	background: #152d7a;
}

.search-close {
	position: absolute;
	right: -50px;
	top: 50%;
	transform: translateY(-50%);
	font-size: 32px;
	color: #999;
	cursor: pointer;
	transition: color 0.3s ease;
	line-height: 1;
}

.search-close:hover {
	color: #333;
}

/* 移动端菜单按钮 - PC端隐藏 */
.mobile-menu-btn,
.nav-mobile {
	display: none;
}

/* ---------- 轮播图区域 ---------- */
.banner {
	margin-top: 140px;
	position: relative;
}

.banner-swiper {
	width: 100%;
	height: 600px;
}

.banner-img {
	width: 100%;
	height: 100%;
	background-size: cover;
	background-position: center;
	position: relative;
	display: flex;
	align-items: center;
	justify-content: center;
}

.banner-img::before {
	content: '';
	position: absolute;
	top: 0;
	left: 0;
	width: 100%;
	height: 100%;
	background: linear-gradient(to right, rgba(0, 51, 102, 0.7) 0%, rgba(0, 51, 102, 0.3) 50%, rgba(0, 51, 102, 0.5) 100%);
}

.banner-content {
	position: relative;
	z-index: 2;
	text-align: center;
	color: #fff;
	max-width: 1360px;
	padding: 0 20px;
	margin-top: 350px;
}

.banner-title {
	font-size: 60px;
	font-weight: 600;
	margin-bottom: 10px;
	text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
	line-height: 1.3;
}

.banner-subtitle {
	font-size: 36px;
	opacity: 0.9;
	text-shadow: 0 1px 5px rgba(0, 0, 0, 0.3);
}

/* 轮播图分页器 */
.banner-pagination {
	bottom: 30px !important;
}

.banner-pagination .swiper-pagination-bullet {
	width: 12px;
	height: 12px;
	background: rgba(255, 255, 255, 0.5);
	opacity: 1;
	margin: 0 6px !important;
	transition: all 0.3s ease;
}

.banner-pagination .swiper-pagination-bullet-active {
	background: #fff;
	width: 30px;
	border-radius: 6px;
}

/* ---------- 课题组介绍 ---------- */
.intro-section {
	padding: 80px 0;
	background-size: cover;
	background-position: center;
	background-repeat: no-repeat;
}

.intro-container {
	max-width: 1360px;
	width: 90%;
	margin: 0 auto;
	text-align: center;
}

.intro-title {
	font-size: 36px;
	color: #333;
	font-weight: 600;
	margin-bottom: 20px;
}

.intro-line {
	width: 60px;
	height: 3px;
	background: #1e3fb0;
	margin: 0 auto 30px;
}

.intro-section .intro-text{
	display: block;
}

.intro-text {
	font-size: 18px;
	color: #222222;
	line-height: 2;
	margin-bottom: 40px;
	text-align: justify;
	text-indent: 2em;
}

.intro-more {
	display: inline-flex;
	align-items: center;
	gap: 10px;
	padding: 12px 30px;
	border: 1px solid #715df8;
	border-radius: 25px;
	text-decoration: none;
	transition: all 0.3s ease;
}

.intro-more span {
	font-size: 18px;
	color: #715df8;
	transition: color 0.3s ease;
}

.intro-more img {
	transition: transform 0.3s ease;
}

.intro-more:hover {
	background: #1e3fb0;
}

.intro-more:hover span {
	color: #fff;
}

.intro-more:hover img {
	transform: translateX(5px);
	filter: brightness(0) invert(1);
}

/* ---------- 研究组成员 ---------- */
.team-section {
	padding: 80px 0;
	background: #fff;
}

.team-container {
	max-width: 1360px;
	width: 90%;
	margin: 0 auto;
	display: flex;
	align-items: center;
	gap: 60px;
}

.team-left {
	flex: 0 0 auto;
	overflow: visible;
	border-radius: 20px;
}

.team-left img {
	width: 650px;
	height: 590px;
	object-fit: cover;
	display: block;
	transition: transform 0.5s ease;
}

.team-left:hover img {
	transform: translateY(-10px);
}

.team-right {
	flex: 1;
}

.team-title {
	font-size: 36px;
	color: #333;
	font-weight: 600;
	margin-bottom: 20px;
}

.team-line {
	width: 60px;
	height: 3px;
	background: #1e3fb0;
	margin-bottom: 30px;
}

.team-content {
	margin-bottom: 40px;
}

.team-content p {
	font-size: 16px;
	color: #555;
	line-height: 1.8;
	margin-bottom: 15px;
}

.team-content p:last-child {
	margin-bottom: 0;
}

.team-more {
	display: inline-flex;
	align-items: center;
	gap: 10px;
	padding: 12px 30px;
	border: 1px solid #1d41af;
	border-radius: 25px;
	text-decoration: none;
	transition: all 0.3s ease;
}

.team-more span {
	font-size: 16px;
	color: #1d41af;
	transition: color 0.3s ease;
}

.team-more img {
	transition: transform 0.3s ease;
}

.team-more:hover {
	background: #1d41af;
}

.team-more:hover span {
	color: #fff;
}

.team-more:hover img {
	transform: translateX(5px);
	filter: brightness(0) invert(1);
}

/* ---------- 研究方向 ---------- */
.research-section {
	padding: 80px 0;
	background-size: cover;
	background-position: center;
	background-repeat: no-repeat;
}

.research-container {
	max-width: 1360px;
	width: 90%;
	margin: 0 auto;
	position: relative;
}

.research-header {
	display: flex;
	justify-content: center;
	align-items: flex-end;
	margin-bottom: 50px;
	position: relative;
}

.research-title-wrap {
	text-align: center;
}

.research-title {
	font-size: 36px;
	color: #333;
	font-weight: 600;
	margin-bottom: 20px;
}

.research-line {
	width: 60px;
	height: 3px;
	background: #1e3fb0;
	margin: 0 auto;
}

.research-view-more {
	position: absolute;
	right: 0;
	bottom: 0;
	font-size: 14px;
	color: #1e3fb0;
	text-decoration: none;
	border-bottom: 1px solid transparent;
	transition: color 0.3s ease, border-color 0.3s ease;
}

.research-view-more:hover {
	color: #152d7a;
	border-bottom-color: #152d7a;
}

.research-list {
	display: flex;
	flex-direction: column;
	gap: 40px;
}

.research-item {
	display: flex;
	align-items: center;
	gap: 40px;
	background: rgba(255, 255, 255, 0.9);
	border-radius: 10px;
	padding: 30px;
	box-shadow: 0 2px 20px rgba(0, 0, 0, 0.05);
	text-decoration: none;
	transition: transform 0.4s ease, box-shadow 0.4s ease !important;
}

.research-item:hover {
	transform: translateY(-10px) !important;
	box-shadow: 0 15px 40px rgba(0, 0, 0, 0.12) !important;
}

.research-item.reverse {
	flex-direction: row-reverse;
}

.research-item-img {
	flex: 0 0 auto;
}

.research-item-img {
	flex: 0 0 auto;
	overflow: hidden;
	border-radius: 20px;
	border: 1px solid #ddd;
	transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.research-item-img:hover {
	transform: translateY(-5px);
	box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

.research-item-img img {
	width: 406px;
	height: 270px;
	object-fit: cover;
	display: block;
	transition: transform 0.3s ease;
}

.research-item-img:hover img {
	transform: scale(1.05);
}

.research-item-content {
	flex: 1;
}

.research-item-title {
	font-size: 18px;
	color: #333;
	font-weight: 600;
	margin-bottom: 15px;
	transition: color 0.3s ease;
}

.research-item:hover .research-item-title {
	color: #1e3fb0;
}

.research-item-desc {
	font-size: 16px;
	color: #666;
	line-height: 1.8;
	margin-bottom: 15px;
}

.research-item-source {
	font-size: 18px;
	color: #1e3fb0;
	text-decoration: none;
	border-bottom: 1px solid transparent;
	transition: border-color 0.3s ease;
}

.research-item:hover .research-item-source {
	border-bottom-color: #1e3fb0;
}

/* ---------- 代表性研究成果 ---------- */
.achievements-section {
	height: 840px;
	background-size: cover;
	background-position: center;
	background-repeat: no-repeat;
	display: flex;
	align-items: center;
}

.achievements-container {
	max-width: 1360px;
	width: 90%;
	margin: 0 auto;
	position: relative;
}

.achievements-header {
	display: flex;
	justify-content: center;
	align-items: flex-end;
	margin-bottom: 50px;
	position: relative;
}

.achievements-title-wrap {
	text-align: center;
}

.achievements-title {
	font-size: 36px;
	color: #fff;
	font-weight: 600;
	margin-bottom: 20px;
}

.achievements-line {
	width: 60px;
	height: 3px;
	background: #fff;
	margin: 0 auto;
}

.achievements-view-more {
	position: absolute;
	right: 0;
	bottom: 0;
	font-size: 14px;
	color: #fff;
	text-decoration: none;
	border-bottom: 1px solid transparent;
	transition: color 0.3s ease, border-color 0.3s ease;
}

.achievements-view-more:hover {
	color: rgba(255, 255, 255, 0.8);
	border-bottom-color: rgba(255, 255, 255, 0.8);
}

.achievements-swiper {
	width: 100%;
	padding-bottom: 50px;
}

.achievements-swiper .swiper-slide {
	height: auto;
}

.achievements-card {
	display: block;
	flex: 1;
	background: rgba(255, 255, 255, 0.95);
	border-radius: 10px;
	box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
	text-decoration: none;
	transition: transform 0.4s ease, box-shadow 0.4s ease !important;
	padding-top: 5px;
}

.achievements-card:hover {
	box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15) !important;
}

.achievements-card-img {
	overflow: hidden;
	border-radius: 20px;
	border: 1px solid #ddd;
	margin: 20px;
}

.achievements-card-img img {
	width: 100%;
	height: 260px;
	object-fit: cover;
	display: block;
	border-radius: 20px;
	transition: transform 0.5s ease;
}

.achievements-card:hover .achievements-card-img img {
	transform: scale(1.05);
}

.achievements-card-content {
	padding: 20px 25px 25px;
	height: 140px;
}

.achievements-card-title {
	font-size: 16px;
	color: #333;
	font-weight: 600;
	margin-bottom: 12px;
	transition: color 0.3s ease;
}

.achievements-card:hover .achievements-card-title {
	color: #1e3fb0;
}

.achievements-card-desc {
	font-size: 14px;
	color: #666;
	line-height: 1.7;
	margin-bottom: 15px;
}

.achievements-card-source {
	font-size: 14px;
	color: #1e3fb0;
}

.achievements-pagination {
	bottom: 0 !important;
}

.achievements-pagination .swiper-pagination-bullet {
	width: 10px;
	height: 10px;
	background: #d4dcf9;
	opacity: 1;
	margin: 0 6px !important;
	transition: all 0.3s ease;
}

.achievements-pagination .swiper-pagination-bullet-active {
	background: #1e3fb0;
	width: 25px;
	border-radius: 5px;
}

/* ---------- 相关链接 ---------- */
.links-section {
	padding: 60px 0;
	background: #fff;
}

.links-container {
	max-width: 1360px;
	width: 90%;
	margin: 0 auto 30px;
}

.links-title {
	font-size: 24px;
	color: #333;
	font-weight: 600;
	margin-bottom: 10px;
}

.links-line {
	width: 60px;
	height: 2px;
	background: #1e3fb0;
}

.links-swiper-wrap {
	display: flex;
	align-items: center;
	justify-content: center;
	gap: 20px;
	position: relative;
}

.links-container-inner {
	max-width: 1360px;
	width: calc(90% - 100px);
	overflow: hidden;
}

.links-swiper {
	width: 100%;
}

.links-swiper .swiper-slide {
	width: auto;
}

.links-item {
	display: block;
	width: 325px;
	height: 120px;
	overflow: hidden;
}

.links-item img {
	width: 100%;
	height: 100%;
	object-fit: cover;
	display: block;
	transition: transform 0.3s ease;
}

.links-item:hover img {
	transform: scale(1.05);
}

.links-prev,
.links-next {
	width: 40px;
	height: 40px;
	background: transparent;
	border-radius: 0;
	display: flex;
	align-items: center;
	justify-content: center;
	flex-shrink: 0;
	position: static;
	margin-top: 0;
}

.links-prev::after,
.links-next::after {
	display: none;
}

.links-prev img,
.links-next img {
	width: 100%;
	height: 100%;
	object-fit: contain;
	transition: transform 0.3s ease;
}

.links-prev:hover img,
.links-next:hover img {
	transform: scale(1.15);
}

/* ---------- 加入我们 ---------- */
.join-section {
	background: #fff;
	padding-top: 0;
}

.join-container {
	max-width: 1360px;
	width: 90%;
	margin: 0 auto;
	display: flex;
	align-items: center;
	gap: 40px;
	border-bottom: 1px solid #ddd;
	padding-bottom: 20px;
}

.join-left {
	flex: 0 0 auto;
	display: flex;
	flex-direction: column;
	align-items: flex-start;
	position: relative;
}

.join-title {
	font-size: 24px;
	color: #333;
	font-weight: 600;
}

.join-line {
	width: 60px;
	height: 2px;
	background: #1e3fb0;
	position: absolute;
	bottom: -21px;
	left: 0;
	z-index: 1;
}

.join-middle {
	flex: 1;
	overflow: hidden;
}

.join-item-single {
	display: block;
	height: 30px;
	line-height: 30px;
	text-decoration: none;
	color: #333;
	font-size: 16px;
	transition: color 0.3s ease;
}

.join-item-single:hover {
	color: #1e3fb0;
}

.join-scroll-list {
	animation: scrollUp 9s ease-in-out infinite;
}

.join-item {
	display: block;
	height: 30px;
	line-height: 30px;
	text-decoration: none;
	color: #333;
	font-size: 16px;
	transition: color 0.3s ease;
}

.join-item:hover {
	color: #1e3fb0;
}

.join-text {
	white-space: nowrap;
	overflow: hidden;
	text-overflow: ellipsis;
	display: block;
}

@keyframes scrollUp {

	0%,
	28% {
		transform: translateY(0);
	}

	33%,
	61% {
		transform: translateY(-30px);
	}

	66%,
	94% {
		transform: translateY(-60px);
	}

	100% {
		transform: translateY(0);
	}
}

.join-right {
	flex: 0 0 auto;
	display: flex;
	align-items: flex-end;
}

.join-view-more {
	font-size: 14px;
	color: #1e3fb0;
	text-decoration: none;
	border-bottom: 1px solid transparent;
	transition: color 0.3s ease, border-color 0.3s ease;
	line-height: 1;
	padding-bottom: 2px;
}

.join-left .join-view-more {
	display: none;
}

.join-view-more:hover {
	color: #152d7a;
	border-bottom-color: #152d7a;
}

/* ---------- 新闻与动态 ---------- */
.news-section {
	padding: 80px 0;
	background: #fff;
}

.news-container {
	max-width: 1360px;
	width: 90%;
	margin: 0 auto;
	display: flex;
	gap: 40px;
	align-items: flex-start;
}

.news-left {
	flex: 0 0 720px;
}

.news-swiper {
	width: 720px;
	height: 440px;
	overflow: hidden;
	position: relative;
}

.news-swiper .swiper-slide {
	position: relative;
}

.news-swiper-card {
	width: 100%;
	height: 100%;
	background: #f0f7fd;
	border: 3px solid #1e3fb0;
	padding: 15px;
	overflow: hidden;
	display: flex;
	flex-direction: column;
	box-sizing: border-box;
}

.news-swiper-title {
	padding: 0 0 10px 0;
	color: #03519a;
	font-size: 30px;
	font-weight: bold;
	text-align: center;
	line-height: 1.3;
	flex-shrink: 0;
	min-height: 88px;
	display: flex;
	align-items: center;
	justify-content: center;
}

.news-swiper-img {
	width: 100%;
	flex: 1;
	position: relative;
	overflow: hidden;
}

.news-swiper-img img {
	position: absolute;
	top: 0;
	left: 0;
	width: 100%;
	height: 100%;
	object-fit: cover;
	display: block;
}

.prev2,
.next2 {
	width: 40px;
	height: 80px;
	background: transparent;
	border-radius: 0;
	margin-top: -40px;
	display: flex;
	align-items: center;
	justify-content: center;
}

.prev2::after,
.next2::after {
	display: none;
}

.prev2 img,
.next2 img {
	width: 100%;
	height: 100%;
	object-fit: contain;
	transition: transform 0.3s ease;
}

.prev2:hover img,
.next2:hover img {
	transform: scale(1.15);
}

.prev2 {
	left: 0;
}

.next2 {
	right: 0;
}

.news-right {
	flex: 1;
}

.news-header {
	display: flex;
	justify-content: space-between;
	align-items: center;
	margin-bottom: 10px;
	padding-bottom: 15px;
	position: relative;
}

.news-header::after {
	content: '';
	position: absolute;
	bottom: 0;
	left: 0;
	width: 60px;
	height: 2px;
	background: #1e3fb0;
}

.news-title {
	font-size: 24px;
	color: #333;
	font-weight: 600;
}

.news-view-more {
	font-size: 14px;
	color: #1e3fb0;
	text-decoration: none;
	border-bottom: 1px solid transparent;
	transition: color 0.3s ease, border-color 0.3s ease;
}

.news-view-more:hover {
	color: #152d7a;
	border-bottom-color: #152d7a;
}

.news-list {
	display: flex;
	flex-direction: column;
	gap: 10px;
}

.news-list .news-item {
	display: block;
	text-decoration: none;
	padding: 15px 20px 15px 20px;
	background: #f0f7fd;
	border-radius: 8px;
	transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.news-item:last-child {
	margin-bottom: 0;
}

.news-item:hover {
	transform: translateX(5px);
}

.news-item-title {
	font-size: 18px;
	color: #333;
	font-weight: 600;
	margin-bottom: 6px;
	line-height: 1.5;
	transition: color 0.3s ease;
	display: -webkit-box;
	-webkit-box-orient: vertical;
	-webkit-line-clamp: 1;
	overflow: hidden;
}

.news-item:hover .news-item-title {
	color: #1e3fb0;
}

.news-item-desc {
	font-size: 16px;
	color: #666;
	line-height: 1.6;
	margin-bottom: 6px;
	display: -webkit-box;
	-webkit-box-orient: vertical;
	-webkit-line-clamp: 1;
	overflow: hidden;
}

.news-item-meta {
	display: flex;
	justify-content: space-between;
	align-items: center;
}

.news-item-date {
	font-size: 14px;
	color: #999;
}

.news-item-arrow {
	font-size: 16px;
	color: #1e3fb0;
	transition: transform 0.3s ease;
}

.news-item:hover .news-item-arrow {
	transform: translateX(5px);
}

/* ============================================
   动画效果总览
   ============================================
   
   【ScrollReveal 滚动淡入动画】
   文件：js/tool.js
   用途：课题组介绍等模块滚动进入视口时的淡入效果
   禁用：注释 tool.js 中的 ScrollReveal 代码块
   
   【CSS Hover 动画】
   文件：本文件下方
   用途：导航下划线、按钮hover等交互效果
   禁用：注释对应的 CSS 选择器
   
   【轮播图内容动画】
   文件：本文件下方
   用途：banner标题/副标题切换时的淡入效果
   禁用：注释对应的 @keyframes 和 animation 代码
   
   ============================================ */

/* ---------- 导航链接下划线动画 ----------
   禁用：注释掉 .nav-link::after 和 .nav-link:hover::after
   -------------------------------------- */
.nav-link::after {
	content: '';
	position: absolute;
	bottom: -48px;
	left: 0;
	width: 0;
	height: 4px;
	background: #1d41af;
	transition: width 0.3s ease;
}

.nav-link:hover::after,
.nav-link.active::after {
	width: 100%;
}

/* ---------- Logo悬停缩放动画 ----------
   禁用：注释掉 .logo a 的 transition 和 transform
   -------------------------------------- */
.logo a {
	transition: transform 0.3s ease;
}

.logo a:hover {
	transform: scale(1.02);
}

/* ---------- 轮播图内容淡入动画 ----------
   用途：banner切换时标题从下方淡入
   禁用：注释整个代码块
   -------------------------------------- */
.swiper-slide-active .banner-title {
	animation: fadeInUp 0.8s ease forwards;
}

.swiper-slide-active .banner-subtitle {
	animation: fadeInUp 0.8s ease 0.2s forwards;
	opacity: 0;
}

@keyframes fadeInUp {
	from {
		opacity: 0;
		transform: translateY(30px);
	}

	to {
		opacity: 1;
		transform: translateY(0);
	}
}

/* 下拉菜单项依次显示 */
.dropdown-menu li {
	opacity: 0;
	transform: translateY(-10px);
	transition: all 0.3s ease;
}

.has-dropdown:hover .dropdown-menu li:nth-child(1) {
	opacity: 1;
	transform: translateY(0);
	transition-delay: 0.05s;
}

.has-dropdown:hover .dropdown-menu li:nth-child(2) {
	opacity: 1;
	transform: translateY(0);
	transition-delay: 0.1s;
}

.has-dropdown:hover .dropdown-menu li:nth-child(3) {
	opacity: 1;
	transform: translateY(0);
	transition-delay: 0.15s;
}

/* ---------- 页脚 ---------- */
.footer {
	background-size: cover;
	background-position: center;
	background-repeat: no-repeat;
	padding: 40px 0;
	text-align: center;
	color: #fff;
}

.footer-container {
	max-width: 1360px;
	width: 90%;
	margin: 0 auto;
}

.footer-address {
	font-size: 16px;
	margin-bottom: 10px;
	opacity: 0.9;
}

.footer-copyright {
	font-size: 16px;
	margin-bottom: 10px;
	opacity: 0.9;
}

.footer-icp {
	font-size: 16px;
	opacity: 0.8;
}

/* ---------- 研究人员列表页面 ---------- */
.page-banner {
	margin-top: 140px;
	position: relative;
}

.page-banner-bg {
	width: 100%;
	height: 200px;
	background-size: cover;
	background-position: center;
	position: relative;
	display: flex;
	align-items: center;
	justify-content: center;
}

.page-banner-content {
	position: relative;
	z-index: 2;
	text-align: center;
	color: #fff;
}

.page-banner-title {
	font-size: 40px;
	font-weight: 600;
	margin-bottom: 10px;
	text-shadow:
		2px 2px 4px rgba(0, 0, 0, 0.4),
		0 0 30px rgba(0, 0, 0, 0.3);
	letter-spacing: 2px;
}

.page-banner-subtitle {
	font-size: 24px;
	opacity: 0.95;
	text-shadow:
		1px 1px 2px rgba(0, 0, 0, 0.4),
		0 0 20px rgba(0, 0, 0, 0.3);
	letter-spacing: 1px;
}

/* 研究人员列表区域 */
.researchers-section {
	padding: 40px 0 60px;
	background: #fff;
}

.researchers-container {
	max-width: 1360px;
	width: 90%;
	margin: 0 auto;
	display: flex;
	gap: 60px;
}

/* 左侧导航菜单 - 宽度280px */
.researchers-sidebar {
	width: 280px;
	flex-shrink: 0;
	background: #f0f7fd;
	border: 1px solid #e8e8e8;
	align-self: flex-start;
}

.researchers-sidebar-header {
	padding: 18px 20px;
	box-sizing: border-box;
	background: #1d41af;
	color: #fff;
	height: 110px;
	display: flex;
	align-items: center;
	padding-left: 40px;
}

.researchers-sidebar-header h3 {
	font-size: 30px;
	font-weight: 600;
}

.researchers-nav-list {
	list-style: none;
	padding: 0;
}

.researchers-nav-item {
	border-bottom: 1px solid #f0f0f0;
	position: relative;
}

.researchers-nav-item:last-child {
	border-bottom: none;
}

.researchers-nav-item::before {
	content: '';
	position: absolute;
	left: 0;
	top: 50%;
	transform: translateY(-50%);
	width: 3px;
	height: 0;
	background: #1d41af;
	transition: height 0.3s ease;
}

.researchers-nav-item:hover::before,
.researchers-nav-item.active::before {
	height: 100%;
}

.researchers-nav-item a {
	display: flex;
	align-items: center;
	font-size: 22px;
	color: #666;
	text-decoration: none;
	transition: all 0.3s ease;
	background-color: transparent;
	box-sizing: border-box;
	padding-left: 40px;
	height: 80px;
}

.researchers-nav-item:hover>a {
	background: transparent;
	color: #1d41af;
}

.researchers-nav-item.active>a {
	background: transparent;
	color: #1d41af;
}

/* 右侧内容区域 */
.researchers-content {
	flex: 1;
	background: #fff;
}

.researchers-content-header {
	display: flex;
	justify-content: space-between;
	align-items: baseline;
	margin-bottom: 25px;
	padding-bottom: 15px;
	border-bottom: 1px solid #e8e8e8;
}

.researchers-content-title {
	font-size: 36px;
	color: #333;
	font-weight: 600;
	position: relative;
}

.researchers-content-title::after {
	content: '';
	position: absolute;
	bottom: -16px;
	left: 0;
	width: 70px;
	height: 4px;
	background: #1d41af;
}

.researchers-breadcrumb {
	font-size: 14px;
	color: #999;
}

/* 研究人员网格布局 */
.researchers-grid {
	display: flex;
	flex-wrap: wrap;
	gap: 40px;
	padding-top: 10px;
}

.researchers-card {
	width: calc((100% - 80px) / 3);
	max-width: 300px;
	text-align: center;
	text-decoration: none;
	display: block;
	transition: transform 0.3s ease;
}

.researchers-card:hover {
	transform: translateY(-5px);
}

.researchers-card-img {
	width: 100%;
	aspect-ratio: 3/4;
	background: #1d41af;
	border-radius: 8px;
	overflow: hidden;
	margin-bottom: 12px;
}

.researchers-card-img img {
	width: 100%;
	height: 100%;
	object-fit: cover;
	display: block;
	transition: transform 0.3s ease;
}

.researchers-card:hover .researchers-card-img img {
	transform: scale(1.05);
}

.researchers-card-name {
	font-size: 20px;
	color: #333;
	font-weight: 600;
	margin-bottom: 5px;
}

.researchers-card-role {
	font-size: 16px;
	color: #999;
}

/* 分页样式 */
.pagination {
	display: flex;
	justify-content: center;
	align-items: center;
	gap: 8px;
	margin-top: 50px;
	padding-top: 30px;
}

.pagination a,
.pagination span {
	display: flex;
	align-items: center;
	justify-content: center;
	min-width: 36px;
	height: 36px;
	padding: 0 12px;
	font-size: 14px;
	color: #666;
	text-decoration: none;
	border: 1px solid #ddd;
	border-radius: 4px;
	transition: all 0.3s ease;
}

.pagination a:hover {
	background: #f0f7fd;
	color: #1d41af;
	border-color: #1d41af;
}

.pagination .page-num.active {
	background: #1d41af;
	color: #fff;
	border-color: #1d41af;
}

.pagination .page-ellipsis {
	border: none;
	color: #999;
}

.pagination .page-prev,
.pagination .page-next {
	padding: 0 16px;
}

/* ---------- 回到顶部按钮 ---------- */
.back-to-top {
	position: fixed;
	bottom: 50px;
	right: 30px;
	width: 50px;
	height: 50px;
	background: #1e3fb0;
	border-radius: 50%;
	display: flex;
	align-items: center;
	justify-content: center;
	cursor: pointer;
	opacity: 0;
	visibility: hidden;
	transform: translateY(20px);
	transition: all 0.3s ease;
	z-index: 999;
	box-shadow: 0 4px 12px rgba(30, 63, 176, 0.4);
}

.back-to-top.show {
	opacity: 1;
	visibility: visible;
	transform: translateY(0);
}

.back-to-top:hover {
	background: #152d7a;
	transform: translateY(-3px);
	box-shadow: 0 6px 16px rgba(30, 63, 176, 0.5);
}

.back-to-top-arrow {
	color: #fff;
	font-size: 20px;
	font-weight: bold;
	line-height: 1;
}

/* ---------- 论文列表页面 ---------- */

/* 左侧三级栏目菜单样式 */
.researchers-nav-item.has-submenu {
	position: relative;
}

.researchers-nav-item.has-submenu>a {
	position: relative;
}

.researchers-nav-item.has-submenu>a::after {
	content: '';
	position: absolute;
	right: 20px;
	top: 50%;
	transform: translateY(-50%);
	width: 0;
	height: 0;
	border-left: 5px solid transparent;
	border-right: 5px solid transparent;
	border-top: 5px solid #666;
	transition: transform 0.3s ease;
}

.researchers-nav-item.has-submenu.expanded>a::after {
	transform: translateY(-50%) rotate(180deg);
	border-top-color: #1d41af;
}

/* 论文清单展开时，父级菜单保持默认样式，不激活 */
.researchers-nav-item.has-submenu.expanded>a {
	color: #666;
	border-left: 3px solid transparent;
	background-color: transparent;
}

/* hover论文清单时激活父级 */
.researchers-nav-item.has-submenu:hover>a {
	color: #1d41af;
	border-left: 3px solid #1d41af;
	background-color: transparent;
}

/* 当子年份被active时，父级论文清单也激活 */
.researchers-nav-item.has-submenu.active:has(.submenu-item.active)>a {
	color: #1d41af;
	border-left: 3px solid #1d41af;
	background-color: transparent;
}

/* 三级栏目列表 */
.submenu-list {
	list-style: none;
	padding: 0;
	background: transparent;
}

.submenu-item {
	border-bottom: none;
}

.submenu-item a {
	display: flex;
	align-items: center;
	font-size: 18px;
	color: #666;
	text-decoration: none;
	transition: all 0.1s ease;
	background-color: transparent;
	padding-left: 60px;
	height: 40px;
	position: relative;
}

.submenu-item a::before {
	content: '';
	position: absolute;
	left: 40px;
	top: 50%;
	transform: translateY(-50%);
	width: 6px;
	height: 6px;
	background: #999;
	border-radius: 50%;
}

/* 每个年份项单独hover效果 - 只改变当前项字体颜色 */
.submenu-item>a:hover {
	color: #1d41af;
	background-color: transparent;
}

.submenu-item>a:hover::before {
	background: #1d41af;
}

.submenu-item.active>a {
	color: #1d41af;
	background-color: transparent;
}

.submenu-item.active>a::before {
	background: #1d41af;
}

/* 论文列表样式 */
.paper-list {
	display: flex;
	flex-direction: column;
	padding-top: 10px;
}

.paper-item {
	display: flex;
	gap: 30px;
	padding: 40px 0;
	background: #fff;
	border-bottom: 1px solid #e8e8e8;
	text-decoration: none;
	transition: box-shadow 0.3s ease, transform 0.3s ease;
}

.paper-item:hover {
	/* 无hover效果 */
}
.paper-item2 {
	padding: 40px 0;
	background: #fff;
	border-bottom: 1px solid #e8e8e8;
	text-decoration: none;
	transition: box-shadow 0.3s ease, transform 0.3s ease;
}
.paper-qdtit{
	font-size: 18px;
	font-weight: bold;
	color: #1d41af;	
	margin-bottom: 20px;
}
.paper-qdxx{
	font-size: 16px;
	color: #333;
	list-style: 1.5;	
}
.paper-qdxx p{
	margin-bottom: 20px;
}


/* 论文图片容器 - 使用百分比保持 3:2 比例 (300*200) */
.paper-img-wrapper {
	flex: 0 0 auto;
	width: 25%;
	max-width: 300px;
	min-width: 180px;
	position: relative;
	overflow: hidden;
	border-radius: 10px;
	border: 1px solid #ddd;
	background: #fff;
}

/* 使用 padding-top 百分比保持 3:2 比例 (200/300 = 66.67%) */
.paper-img-wrapper::before {
	content: '';
	display: block;
	padding-top: 66.67%;
}

.paper-img-wrapper img {
	position: absolute;
	top: 0;
	left: 0;
	width: 100%;
	height: 100%;
	object-fit: cover;
	display: block;
	transition: transform 0.3s ease;
}

.paper-item:hover .paper-img-wrapper img {
	transform: scale(1.05);
}

/* 论文信息区域 */
.paper-info {
	flex: 1;
	display: flex;
	flex-direction: column;
	justify-content: center;
}

.paper-date {
	display: flex;
	align-items: baseline;
	gap: 5px;
	margin-bottom: 12px;
}

.paper-day {
	font-size: 24px;
	font-weight: 600;
	color: #1d41af;
	line-height: 1;
}

.paper-divider {
	font-size: 18px;
	color: #1d41af;
}

.paper-year {
	font-size: 16px;
	color: #666;
}

.paper-title {
	font-size: 18px;
	color: #333;
	font-weight: 600;
	line-height: 1.5;
	margin-bottom: 10px;
	transition: color 0.3s ease;
}

.paper-item:hover .paper-title {
	color: #1d41af;
}

.paper-intr {
	font-size: 16px;
	color: #666;
}

.paper-journal {
	font-size: 18px;
	color: #1d41af;
	margin-top: 40px;
}

/* ---------- 研究设备列表页面 ---------- */

/* 设备网格布局 - 2列 */
.equipment-grid {
	display: flex;
	flex-wrap: wrap;
	gap: 30px;
	padding-top: 10px;
}

.equipment-card {
	width: calc((100% - 30px) / 2);
	text-align: center;
	display: block;
}

/* 设备图片容器 - 使用百分比保持 3:2 比例 (300*200) */
.equipment-card-img {
	width: 100%;
	position: relative;
	overflow: hidden;
	border-radius: 10px;
	background: #1d41af;
}

/* 使用 padding-top 百分比保持 3:2 比例 (200/300 = 66.67%) */
.equipment-card-img::before {
	content: '';
	display: block;
	padding-top: 66.67%;
}

.equipment-card-img img {
	position: absolute;
	top: 0;
	left: 0;
	width: 100%;
	height: 100%;
	object-fit: cover;
	display: block;
}

.equipment-card-name {
	font-size: 16px;
	color: #333;
	margin-top: 12px;
}

/* ---------- 新闻详情页 ---------- */

/* 新闻详情内容区域 */
.news-detail-content {
	padding-top: 10px;
}

/* 新闻详情标题 */
.news-detail-title {
	font-size: 30px;
	color: #333;
	font-weight: 600;
	line-height: 1.5;
	margin-bottom: 20px;
	text-align: center;
}

/* 新闻详情元信息 */
.news-detail-meta {
	display: flex;
	justify-content: center;
	align-items: center;
	gap: 30px;
	padding-top: 20px;
	margin-top: 30px;
	border-top: 1px dashed #ddd;
	font-size: 14px;
	color: #999;
	margin-bottom: 30px;
}

.news-detail-time,
.news-detail-views {
	color: #999;
}

/* 新闻详情正文 */
.news-detail-body {
	font-size: 16px;
	color: #333;
	line-height: 2;
	min-height: 500px;
}

.news-detail-body p {
	margin-bottom: 20px;
	text-indent: 2em;
	text-align: justify;
}

.news-detail-body p:last-child {
	margin-bottom: 0;
}

/* 设备卡片hover效果 */
.equipment-card:hover .equipment-card-img img {
	transform: scale(1.05);
}

.equipment-card:hover .equipment-card-name {
	color: #1d41af;
}

/* ---------- 新闻列表页面 ---------- */

/* 新闻列表容器 */
.researchers-content .news-list {
	display: flex;
	flex-direction: column;
	gap: 15px;
	padding-top: 10px;
}

/* 新闻条目 */
.researchers-content .news-item {
	display: flex;
	gap: 30px;
	padding: 25px 30px 25px 10px;
	background: #f0f7fd;
	border-radius: 8px;
	text-decoration: none;
	transition: all 0.3s ease;
}

.researchers-content .news-item:hover {
	background: #e0effd;
	transform: translateX(5px);
	box-shadow: 0 4px 12px rgba(0, 85, 149, 0.15);
}

/* 新闻日期 */
.researchers-content .news-date {
	flex: 0 0 auto;
	display: flex;
	flex-direction: column;
	align-items: center;
	justify-content: center;
	width: 80px;
	text-align: center;
	border-right: 1px solid #ddd;
}

.researchers-content .news-day {
	font-size: 30px;
	font-weight: 600;
	color: #1d41af;
	line-height: 1;
	margin-bottom: 5px;
}

.news-year-month {
	font-size: 14px;
	color: #03519a;
}

/* 新闻信息 */
.researchers-content .news-info {
	flex: 1;
	display: flex;
	flex-direction: column;
	justify-content: center;
}

.researchers-content .news-title {
	font-size: 18px;
	color: #333;
	font-weight: 600;
	margin-bottom: 10px;
	transition: color 0.3s ease;
	display: -webkit-box;
	-webkit-box-orient: vertical;
	-webkit-line-clamp: 1;
	overflow: hidden;
}

.researchers-content .news-item:hover .news-title {
	color: #1d41af;
}

.researchers-content .news-desc {
	font-size: 16px;
	color: #666;
	line-height: 1.8;
	display: -webkit-box;
	-webkit-box-orient: vertical;
	-webkit-line-clamp: 2;
	overflow: hidden;
}

/* ---------- 研究人员页面（新布局） ---------- */

/* 页面整体容器 */
.team-page-section {
	padding: 40px 0 60px;
	background: #fff;
}

.team-page-container {
	max-width: 1360px;
	width: 90%;
	margin: 0 auto;
}

/* 页面头部 */
.team-page-header {
	display: flex;
	justify-content: space-between;
	align-items: baseline;
	margin-bottom: 40px;
	padding-bottom: 15px;
	border-bottom: 1px solid #e8e8e8;
}

.team-page-title {
	font-size: 32px;
	color: #333;
	font-weight: 600;
	position: relative;
}

.team-page-title::after {
	content: '';
	position: absolute;
	bottom: -16px;
	left: 0;
	width: 50px;
	height: 3px;
	background: #1d41af;
}

.team-page-breadcrumb {
	font-size: 14px;
	color: #999;
}

.team-page-breadcrumb span {
	color: #1d41af;
}

/* 分类区域 */
.team-category {
	margin-bottom: 50px;
}

.team-category:last-child {
	margin-bottom: 0;
}

.team-category-title {
	font-size: 30px;
	color: #1d41af;
	font-weight: 600;
	margin-bottom: 25px;
}

/* 教授卡片 - 单列布局 */
.team-professor-list {
	display: flex;
	flex-direction: column;
	gap: 25px;
}

.team-professor-card {
	display: flex;
	gap: 30px;
	padding: 25px;
	background: #f8fbfd;
	border-radius: 8px;
	border: 1px solid #e8f0f5;
	transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.team-professor-card:hover {
	transform: translateY(-5px);
	box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.team-professor-card a {
	text-decoration: none;
	color: inherit;
}

.team-professor-card a:hover .team-professor-name {
	color: #1d41af;
}

.team-professor-photo {
	flex: 0 0 auto;
	width: 200px;
	height: 270px;
	background: #1d41af;
	border-radius: 8px;
	overflow: hidden;
}

.team-professor-photo img {
	width: 100%;
	height: 100%;
	object-fit: cover;
	display: block;
}

.team-professor-info {
	flex: 1;
}

.team-professor-name {
	font-size: 20px;
	color: #333;
	font-weight: 600;
	margin-bottom: 8px;
}

.team-professor-position {
	font-size: 16px;
	color: #666;
	margin-bottom: 25px;
}

.team-professor-intro {
	font-size: 16px;
	color: #555;
	line-height: 1.8;
}

.intro-label {
	color: #222;
	font-weight: 600;
}

.team-category .intro-text {
	display: inline;
	font-size: 16px;
	color: #666;
}

/* 研究员/博士后卡片 - 双列网格布局 */
.team-researcher-grid {
	display: grid;
	grid-template-columns: repeat(2, 1fr);
	gap: 25px;
}

.team-researcher-card {
	display: flex;
	gap: 20px;
	padding: 20px;
	background: #f8fbfd;
	border-radius: 8px;
	border: 1px solid #e8f0f5;
	transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.team-researcher-card:hover {
	transform: translateY(-5px);
	box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.team-researcher-card a {
	text-decoration: none;
	color: inherit;
}

.team-researcher-card a:hover .team-researcher-name {
	color: #1d41af;
}

.team-researcher-photo {
	flex: 0 0 auto;
	width: 200px;
	height: 270px;
	background: #1d41af;
	border-radius: 8px;
	overflow: hidden;
}

.team-researcher-photo img {
	width: 100%;
	height: 100%;
	object-fit: cover;
	display: block;
}

.team-researcher-info {
	flex: 1;
}

.team-researcher-name {
	font-size: 20px;
	color: #333;
	font-weight: 600;
	margin-bottom: 6px;
}

.team-researcher-position {
	font-size: 16px;
	color: #666;
	margin-bottom: 25px;
}

.team-researcher-intro {
	font-size: 16px;
	color: #555;
	line-height: 1.7;
}

.team-researcher-intro .intro-text {
	display: -webkit-box;
	-webkit-box-orient: vertical;
	-webkit-line-clamp: 4;
	overflow: hidden;
	text-indent: 0;
	font-size: 16px;
	color: #666;
}

/* 博士研究生 - 四列网格布局 */
.team-phd-grid {
	display: grid;
	grid-template-columns: repeat(4, 1fr);
	gap: 30px;
}

.team-phd-card {
	text-align: center;
	transition: transform 0.3s ease, box-shadow 0.3s ease;
	padding: 15px;
	border-radius: 8px;
}

.team-phd-card:hover {
	transform: translateY(-5px);
	box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.team-phd-card a {
	text-decoration: none;
	color: inherit;
	display: block;
}

.team-phd-card a:hover .team-phd-name {
	color: #1d41af;
}

.team-phd-photo {
	width: 100%;
	aspect-ratio: 200/270;
	background: #1d41af;
	border-radius: 8px;
	overflow: hidden;
	margin-bottom: 15px;
}

.team-phd-photo img {
	width: 100%;
	height: 100%;
	object-fit: cover;
	display: block;
}

.team-phd-name {
	font-size: 16px;
	color: #333;
	font-weight: 600;
	margin-bottom: 5px;
}

.team-phd-position {
	font-size: 14px;
	color: #666;
}

/* ---------- 二级导航 ---------- */
.sub-nav {
	background: #f0f7fd;
}

.sub-nav-container {
	max-width: 1360px;
	width: 90%;
	margin: 0 auto;
	display: flex;
	justify-content: center;
	gap: 80px;
}

.sub-nav-item {
	font-size: 24px;
	color: #666;
	text-decoration: none;
	position: relative;
	transition: color 0.3s ease;
	font-weight: bold;
	line-height: 80px;
}

.sub-nav-item:hover {
	color: #1d41af;
}

.sub-nav-item.active {
	color: #1d41af;
}

.sub-nav-item.active::after {
	content: '';
	position: absolute;
	bottom: 0px;
	left: 50%;
	transform: translateX(-50%);
	width: 100%;
	height: 3px;
	background: #1d41af;
}

/* ---------- 活动列表页面 ---------- */

/* 活动列表区域 */
.activity-section {
	padding: 40px 0 60px;
	background: #fff;
}

.activity-container {
	max-width: 1360px;
	width: 90%;
	margin: 0 auto;
}

/* 页面头部 */
.activity-header {
	display: flex;
	justify-content: space-between;
	align-items: baseline;
	margin-bottom: 40px;
	padding-bottom: 15px;
	border-bottom: 1px solid #e8e8e8;
}

.activity-title {
	font-size: 32px;
	color: #333;
	font-weight: 600;
	position: relative;
}

.activity-title::after {
	content: '';
	position: absolute;
	bottom: -16px;
	left: 0;
	width: 50px;
	height: 3px;
	background: #1d41af;
}

.activity-breadcrumb {
	font-size: 14px;
	color: #999;
}

.activity-breadcrumb span {
	color: #1d41af;
}

/* 活动卡片网格 - 3列布局 */
.activity-grid {
	display: flex;
	flex-wrap: wrap;
	gap: 30px;
	padding-top: 10px;
}

.activity-card {
	width: calc((100% - 60px) / 3);
	text-decoration: none;
	display: block;
	transition: transform 0.3s ease, box-shadow 0.3s ease;
	background: #f3f6ff;
	padding: 10px;
	border-radius: 10px;
	box-sizing: border-box;
}

.activity-card:hover {
	transform: translateY(-5px);
}

/* 活动图片容器 - 使用百分比保持 406:270 比例 (约3:2) */
.activity-card-img {
	width: 100%;
	position: relative;
	overflow: hidden;
	border-radius: 10px;
	background: #f5f5f5;
}

/* 使用 padding-top 百分比保持 406:270 比例 (270/406 = 66.5%) */
.activity-card-img::before {
	content: '';
	display: block;
	padding-top: 66.5%;
}

.activity-card-img img {
	position: absolute;
	top: 0;
	left: 0;
	width: 100%;
	height: 100%;
	object-fit: cover;
	display: block;
	transition: transform 0.3s ease;
}

.activity-card:hover .activity-card-img img {
	transform: scale(1.05);
}

/* 活动卡片内容 */
.activity-card-content {
	padding: 20px;
}

.activity-card-title {
	font-size: 18px;
	color: #333;
	font-weight: 600;
	margin-bottom: 12px;
	line-height: 1.5;
	transition: color 0.3s ease;
}

.activity-card:hover .activity-card-title {
	color: #1d41af;
}

.activity-card-desc {
	font-size: 16px;
	color: #666;
	line-height: 1.7;
	margin-bottom: 12px;
	display: -webkit-box;
	-webkit-box-orient: vertical;
	-webkit-line-clamp: 3;
	overflow: hidden;
}

.activity-card-source {
	font-size: 18px;
	color: #1d41af;
}

.submenu-list {
	display: none;
}

.researchers-nav-item.active .submenu-list{
	display: block;
}