.center-div {
	display: flex;
	flex-direction: row;
	justify-content: center;
	align-items: center;
	/* 居中方案改为使用flex，并控制上下留白 */
	position: absolute;
	top: 10%;
	/* 上留白10% */
	bottom: 15%;
	/* 下留白15%（为页脚留出空间） */
	left: 50%;
	transform: translateX(-50%);
	width: 60%;
	/* 左右各10%空间 */
	max-width: 1200px;
	/* 最大宽度限制 */
	height: auto;
	/* 高度自动适应内容 */
}

/* 关于我们模块样式 */
.about-container {
	width: 100%;
	height: 100%;
	display: flex;
	flex-direction: column;
}


.about-nav {
	display: flex;
	justify-content: space-around;
	margin-bottom: 30px;
	border-bottom: 1px solid var(--border-bottom-color-hover);
}

.about-nav-item {
	padding: 10px 20px;
	color: var(--main-text-color);
	cursor: pointer;
	transition: all 0.3s ease;
	font-size: 1.1em;
	position: relative;
}

.about-nav-item:hover {
	color: #fff;
}

.about-nav-item.active {
	color: #fff;
}

.about-nav-item.active::after {
	content: '';
	position: absolute;
	bottom: -1px;
	left: 20%;
	width: 60%;
	height: 2px;
	background-color: #fff;
}

.about-content {
	height: calc(100% - 80px);
	overflow-y: auto;
	padding: 0 10px;
}

.about-module {
	display: none;
	animation: fadeIn 0.5s ease;
	color: var(--main-text-color);
	padding: 10px;
}

.about-module.active {
	display: block;
}

.module-title {
	font-size: 1.8em;
	margin-bottom: 20px;
	color: #fff;
	text-align: center;
}

.module-text {
	line-height: 1.8;
	font-size: 1.1em;
	margin-bottom: 15px;
	text-align: justify;
}

@keyframes fadeIn {
	from {
		opacity: 0;
	}

	to {
		opacity: 1;
	}
}

/* 响应式调整 */
@media (max-width: 768px) {
	.about-nav {
		flex-wrap: wrap;
	}

	.about-nav-item {
		margin: 5px 0;
		flex: 1 0 48%;
		text-align: center;
	}

	.about-container {
		width: 95%;
		height: 90vh;
		margin: 5vh auto;
	}
}

/* 页脚样式 */
.footer {
	position: absolute;
	bottom: 0;
	left: 0;
	width: 100%;
	height: 80px;
	/* 页脚高度 */
	background-color: rgba(0, 0, 0, 0.6);
	backdrop-filter: blur(10px);
	border-top: 1px solid rgba(255, 255, 255, 0.1);
	z-index: 10;
	display: flex;
	justify-content: center;
	align-items: center;
	padding: 10px 0;
}

.footer-content {
	display: flex;
	justify-content: space-between;
	align-items: center;
	width: 90%;
	max-width: 1200px;
	color: var(--main-text-color);
	font-size: 0.9em;
}

.footer-section {
	flex: 1;
	text-align: center;
	padding: 0 10px;
}

.footer-section p {
	margin: 5px 0;
	text-shadow: 0 1px 2px rgba(0, 0, 0, 0.5);
}

/* 响应式调整 */
@media (max-width: 768px) {
	.center-div {
		top: 8%;
		bottom: 18%;
		width: 95%;
	}

	.footer {
		height: auto;
		min-height: 60px;
	}

	.footer-content {
		flex-direction: column;
		padding: 10px 0;
	}

	.footer-section {
		padding: 5px 0;
	}

	.about-nav {
		flex-wrap: wrap;
	}

	.about-nav-item {
		flex: 1 0 48%;
		margin: 5px 0;
	}
}


/* 时间线容器 */
.timeline-container {
    position: relative;
    padding: 20px 0;
}

/* 时间线主线 */
.timeline-container::before {
    content: '';
    position: absolute;
    left: 80px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, 
        rgba(255, 255, 255, 0.3), 
        rgba(255, 255, 255, 0.1));
}

/* 时间线项目 */
.timeline-item {
    display: flex;
    margin-bottom: 30px;
    position: relative;
    align-items: flex-start;
}

/* 年份标签 */
.timeline-year {
    width: 80px;
    font-size: 1.5em;
    font-weight: bold;
    color: #fff;
    text-align: right;
    padding-right: 20px;
    position: relative;
    z-index: 2;
}

/* 年份圆点 */
.timeline-year::after {
    content: '';
    position: absolute;
    right: -6px;
    top: 5px;
    width: 12px;
    height: 12px;
    background-color: #fff;
    border-radius: 50%;
    box-shadow: 0 0 0 4px rgba(255, 255, 255, 0.2);
}

/* 卡片样式 */
.timeline-card {
    flex: 1;
    margin-left: 40px;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 12px;
    padding: 20px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: all 0.3s ease;
    position: relative;
}

.timeline-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    background: rgba(255, 255, 255, 0.15);
}

/* 卡片标题 */
.card-title {
    font-size: 1.3em;
    margin-bottom: 10px;
    color: #fff;
    font-weight: bold;
}

/* 卡片内容 */
.card-content {
    line-height: 1.6;
    margin-bottom: 15px;
    color: rgba(255, 255, 255, 0.9);
}

/* 标签样式 */
.card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tag {
    background: rgba(255, 255, 255, 0.2);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.8em;
    color: #fff;
    border: 1px solid rgba(255, 255, 255, 0.3);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .timeline-container::before {
        left: 40px;
    }
    
    .timeline-year {
        width: 40px;
        font-size: 1.2em;
    }
    
    .timeline-year::after {
        right: -5px;
        width: 10px;
        height: 10px;
    }
    
    .timeline-card {
        margin-left: 20px;
        padding: 15px;
    }
    
    .card-title {
        font-size: 1.1em;
    }
}

/* 动画效果 */
.timeline-item {
    opacity: 0;
    transform: translateX(-20px);
    animation: slideIn 0.6s ease forwards;
}

.timeline-item:nth-child(1) { animation-delay: 0.1s; }
.timeline-item:nth-child(2) { animation-delay: 0.2s; }
.timeline-item:nth-child(3) { animation-delay: 0.3s; }
.timeline-item:nth-child(4) { animation-delay: 0.4s; }

@keyframes slideIn {
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* 特殊年份高亮（例如当前年份） */
.timeline-item:first-child .timeline-year {
    color: #4CAF50;
}

.timeline-item:first-child .timeline-year::after {
    background-color: #4CAF50;
    box-shadow: 0 0 0 4px rgba(76, 175, 80, 0.3);
}

/* 小字样式 */
.small-txt {
    font-size: 0.85em;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.4;
    margin: 8px 0;
}

/* 在小屏幕上进一步调整 */
@media (max-width: 768px) {
    .small-txt {
        font-size: 0.8em;
    }
}

.medium-txt {
    font-size: 0.95em;
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.6;
    margin: 10px 0;
}

/* 在小屏幕上进一步调整 */
@media (max-width: 768px) {
    .medium-txt {
        font-size: 0.9em;
    }
}

/* WebKit 浏览器滚动条美化（Chrome、Safari、Edge） */
.about-content::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

.about-content::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 4px;
    margin: 5px;
}

.about-content::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.2);
    border-radius: 4px;
    border: 2px solid rgba(255, 255, 255, 0.05);
    transition: all 0.3s ease;
}

.about-content::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.4);
    border-color: rgba(255, 255, 255, 0.1);
}

.about-content::-webkit-scrollbar-thumb:active {
    background: rgba(255, 255, 255, 0.5);
}

.about-content::-webkit-scrollbar-corner {
    background: transparent;
}

/* Firefox 浏览器滚动条美化 */
.about-content {
    scrollbar-width: thin;
    scrollbar-color: rgba(255, 255, 255, 0.2) rgba(255, 255, 255, 0.05);
}

/* 滚动条悬停效果 */
.about-content:hover::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.3);
}

/* 页面整体滚动条美化（如果需要） */
body::-webkit-scrollbar {
    width: 10px;
}

body::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.1);
}

body::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.2);
    border-radius: 5px;
}

body::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.4);
}

/* 在小屏幕上调整滚动条 */
@media (max-width: 768px) {
    .about-content::-webkit-scrollbar {
        width: 6px;
        height: 6px;
    }
    
    .about-content::-webkit-scrollbar-thumb {
        background: rgba(255, 255, 255, 0.3);
    }
}



/* 联系我们容器 */
.contact-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

/* 联系卡片 */
.contact-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 12px;
    padding: 25px;
    text-align: center;
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.contact-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    background: rgba(255, 255, 255, 0.15);
}

.contact-card::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    transform: rotate(45deg);
    transition: all 0.6s ease;
    opacity: 0;
}

.contact-card:hover::before {
    opacity: 1;
    animation: shine 1.5s ease;
}

@keyframes shine {
    0% { transform: translateX(-100%) translateY(-100%) rotate(45deg); }
    100% { transform: translateX(100%) translateY(100%) rotate(45deg); }
}

/* 联系图标 */
.contact-icon {
    font-size: 3em;
    margin-bottom: 15px;
    color: #fff;
}

.contact-icon i {
    filter: drop-shadow(0 0 10px rgba(255, 255, 255, 0.5));
}

/* 联系标题 */
.contact-title {
    font-size: 1.3em;
    margin-bottom: 10px;
    color: #fff;
    font-weight: bold;
}

/* 联系描述 */
.contact-desc {
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 20px;
    font-size: 0.95em;
}

/* 联系链接 */
.contact-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    background: rgba(255, 255, 255, 0.2);
    color: #fff;
    text-decoration: none;
    border-radius: 25px;
    transition: all 0.3s ease;
    font-size: 0.9em;
    margin: 5px;
}

.contact-link:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: scale(1.05);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.contact-link i {
    font-size: 1.1em;
}

/* 邮箱列表 */
.email-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-top: 15px;
}

.email-item {
    display: flex;
    flex-direction: column;
    gap: 5px;
    padding: 10px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 8px;
}

.email-label {
    font-size: 0.85em;
    color: rgba(255, 255, 255, 0.7);
}

.email-link {
    color: #fff;
    text-decoration: none;
    font-weight: bold;
    transition: color 0.3s ease;
}

.email-link:hover {
    color: #4CAF50;
}

/* 联系信息 */
.contact-info {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 30px;
    padding: 20px;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 12px;
    margin-top: 20px;
}

.info-item {
    display: flex;
    align-items: center;
    gap: 10px;
    color: rgba(255, 255, 255, 0.8);
}

.info-item i {
    font-size: 1.2em;
    color: #4CAF50;
}

/* 二维码浮窗 */
.qr-modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(5px);
    animation: fadeIn 0.3s ease;
}

.qr-modal.show {
    display: flex;
    justify-content: center;
    align-items: center;
}

.qr-modal-content {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(20px);
    border-radius: 15px;
    padding: 30px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    text-align: center;
    max-width: 400px;
    width: 90%;
    animation: slideIn 0.3s ease;
    position: relative;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideIn {
    from { 
        opacity: 0;
        transform: translateY(-50px) scale(0.9);
    }
    to { 
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.qr-close {
    position: absolute;
    top: 15px;
    right: 20px;
    font-size: 28px;
    font-weight: bold;
    color: rgba(255, 255, 255, 0.7);
    cursor: pointer;
    transition: color 0.3s ease;
}

.qr-close:hover {
    color: #fff;
}

.qr-modal-header h3 {
    color: #fff;
    margin-bottom: 20px;
    font-size: 1.5em;
}

.qr-modal-body img {
    max-width: 250px;
    width: 100%;
    height: auto;
    border-radius: 10px;
    margin-bottom: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.qr-tip {
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.9em;
    margin: 0;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .contact-container {
        grid-template-columns: 1fr;
    }
    
    .contact-info {
        flex-direction: column;
        gap: 15px;
    }
    
    .qr-modal-content {
        padding: 20px;
    }
    
    .qr-modal-body img {
        max-width: 200px;
    }
}

/* 特殊卡片颜色 */
.contact-card[data-type="wechat-official"] .contact-icon {
    color: #1AAD19;
}

.contact-card[data-type="wechat-service"] .contact-icon {
    color: #1AAD19;
}

.contact-card[data-type="qq-group"] .contact-icon {
    color: #12B7F5;
}

.contact-card[data-type="email"] .contact-icon {
    color: #FF6B6B;
}