* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
        }
        
        body {
            background-color: #f5f7fa;
            color: #333;
            line-height: 1.6;
        }
        
        .container {
            max-width: 800px;
            margin: 0 auto;
            background: white;
            box-shadow: 0 0 20px rgba(0,0,0,0.05);
            position: relative;
        }
        
        section {
            padding: 40px 30px;
            border-bottom: 1px solid #eee;
        }
        
        h2 {
            color: #2c3e50;
            font-size: 1.8rem;
            margin-bottom: 25px;
            padding-bottom: 10px;
            border-bottom: 2px solid #3498db;
            position: relative;
        }
        
        h2::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 60px;
            height: 2px;
            background: #e74c3c;
        }
        
        /* 横幅区域 */
        .banner {
            background: linear-gradient(135deg, #1a2980, #26d0ce);
            color: white;
            text-align: center;
            padding: 60px 20px;
            position: relative;
            overflow: hidden;
        }
        
        .banner::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100" preserveAspectRatio="none"><polygon points="0,0 100,100 0,100" fill="rgba(255,255,255,0.1)"/></svg>');
            background-size: 100% 100%;
        }
        
        .banner h1 {
            font-size: 2.5rem;
            margin-bottom: 15px;
            text-shadow: 1px 1px 3px rgba(0,0,0,0.3);
            position: relative;
        }
        
        .banner p {
            font-size: 1.2rem;
            max-width: 600px;
            margin: 0 auto;
            position: relative;
        }
        
        /* 会议背景 */
        .background p {
            font-size: 1.1rem;
            text-align: justify;
            line-height: 1.8;
        }
        
        /* 时间地点 */
        .time-location {
            background: #f8f9fa;
        }
        
        .info-box {
            background: white;
            border-radius: 8px;
            padding: 25px;
            box-shadow: 0 3px 10px rgba(0,0,0,0.08);
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
        }
        
        .info-item {
            flex: 1;
            min-width: 200px;
        }
        
        .info-item i {
            color: #3498db;
            font-size: 1.8rem;
            margin-bottom: 10px;
        }
        
        .info-item h3 {
            margin-bottom: 10px;
            color: #2c3e50;
        }
        
        /* 主办和联办单位 */
        .organizers {
            display: flex;
            flex-wrap: wrap;
            gap: 30px;
        }
        
        .organizer-group {
            flex: 1;
            min-width: 300px;
        }
        
        .org-list {
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
        }
        
        .org-item {
            background: #f8f9fa;
            padding: 12px 20px;
            border-radius: 6px;
            font-weight: 500;
        }
        
        /* 会议日程 */
        .schedule {
            background: #f8f9fa;
        }
        
        .schedule-item {
            display: flex;
            margin-bottom: 30px;
            padding-bottom: 30px;
            border-bottom: 1px dashed #ddd;
        }
        
        .schedule-time {
            flex: 0 0 120px;
            font-weight: bold;
            color: #e74c3c;
        }
        
        .schedule-content {
            flex: 1;
        }
        
        .schedule-content h3 {
            margin-bottom: 8px;
            color: #2c3e50;
        }
        
        /* 赞助单位 */
        .sponsors {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
            gap: 20px;
            align-items: center;
        }
        
        .sponsor {
            background: white;
            border-radius: 8px;
            padding: 15px;
            text-align: center;
            box-shadow: 0 2px 5px rgba(0,0,0,0.05);
            transition: transform 0.3s ease;
        }
        
        .sponsor:hover {
            transform: translateY(-5px);
        }
        
        .sponsor img {
            max-width: 100%;
            height: 60px;
            object-fit: contain;
        }
        
        /* 展位图
        .booth-map {
            text-align: center;
        }
         */
        .booth-image {
            width: 100%;
            max-width: 700px;
            height: auto;
            border-radius: 8px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
            background: linear-gradient(45deg, #f5f7fa, #e4e7eb);
            display: flex;
            align-items: center;
            justify-content: center;
            aspect-ratio: 16/9;
            margin: 0 auto;
            color: #7f8c8d;
            font-weight: bold;
        }
        
        /* 费用表格 */
        .pricing-table {
            width: 100%;
            border-collapse: collapse;
            margin-top: 20px;
        }
        
        .pricing-table th, .pricing-table td {
            padding: 15px;
            text-align: left;
            border-bottom: 1px solid #eee;
        }
        
        .pricing-table th {
            background: #3498db;
            color: white;
        }
        
        .pricing-table tr:nth-child(even) {
            background: #f8f9fa;
        }
        
        .pricing-table tr:hover {
            background: #e3f2fd;
        }
        
        /* 表单样式 */
        .registration-form .form-group {
            margin-bottom: 20px;
        }
        
        .registration-form label {
            display: block;
            margin-bottom: 8px;
            font-weight: 500;
            color: #2c3e50;
        }
        
        .registration-form input, 
        .registration-form select, 
        .registration-form textarea {
            width: 100%;
            padding: 12px 15px;
            border: 1px solid #ddd;
            border-radius: 4px;
            font-size: 1rem;
        }
        
        .registration-form input:focus, 
        .registration-form select:focus, 
        .registration-form textarea:focus {
            border-color: #3498db;
            outline: none;
            box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.2);
        }
        
        .btn-submit {
            background: #e74c3c;
            color: white;
            border: none;
            padding: 14px 25px;
            font-size: 1.1rem;
            border-radius: 4px;
            cursor: pointer;
            transition: background 0.3s ease;
            display: block;
            width: 100%;
            font-weight: 600;
        }
        
        .btn-submit:hover {
            background: #c0392b;
        }
        
        /* 浮动按钮 */
        .floating-btn {
            position: fixed;
            bottom: 30px;
            right: 30px;
            background: #e74c3c;
            color: white;
            width: 60px;
            height: 60px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 12px rgba(231, 76, 60, 0.4);
            cursor: pointer;
            z-index: 100;
            animation: pulse 2s infinite;
        }
        
        .floating-btn i {
            font-size: 1.5rem;
        }
        
        @keyframes pulse {
            0% { box-shadow: 0 0 0 0 rgba(231, 76, 60, 0.7); }
            70% { box-shadow: 0 0 0 15px rgba(231, 76, 60, 0); }
            100% { box-shadow: 0 0 0 0 rgba(231, 76, 60, 0); }
        }
		/* 往届会议 */
        .past-conferences {
            background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
        }
		        .conference-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 25px;
        }
		     .conference-card {
            background: white;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0,0,0,0.08);
            transition: all 0.3s ease;
        }
        
        .conference-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 12px 25px rgba(0,0,0,0.15);
        }
        
        .conference-image {
            height: 180px;
            background-size: cover;
            background-position: center;
            position: relative;
        }
        
        .conference-image::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 60%;
            background: linear-gradient(to top, rgba(0,0,0,0.7), transparent);
        }
        
        .conference-info {
            padding: 20px;
        }
        
        .conference-info h3 {
            color: #2c3e50;
            margin-bottom: 10px;
        }
        
        .conference-info p {
            color: #7f8c8d;
            font-size: 0.95rem;
            margin-bottom: 15px;
        }
        
        .conference-link {
            display: inline-block;
            background: #3498db;
            color: white;
            padding: 8px 15px;
            border-radius: 5px;
            text-decoration: none;
            font-weight: 500;
            transition: background 0.3s ease;
        }
        
        .conference-link:hover {
            background: #2980b9;
        }
		
        
		
		.contact .info-box {
		    display: flex;
		    flex-wrap: wrap;
		    gap: 20px;
		    margin-top: 20px;
		}
		
		.contact .info-item {
		    flex: 1;
		    min-width: 250px;
		    background: #f8f9fa;
		    border-radius: 10px;
		    padding: 20px;
		    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
		    transition: transform 0.3s ease;
		}
		
		.contact .info-item:hover {
		    transform: translateY(-5px);
		}
		
		.contact .info-item i {
		    font-size: 2rem;
		    color: #2c3e50;
		    margin-bottom: 15px;
		}
		
		.contact .info-item h3 {
		    color: #2c3e50;
		    margin-bottom: 10px;
		}
		
		.contact .info-item p {
		    margin: 8px 0;
		    color: #555;
		}
		
		.wechat-qr {
		    width: 120px;
		    height: 120px;
		    display: block;
		    margin-top: 10px;
		    border: 1px solid #eee;
		    padding: 5px;
		    background: white;
		}
		


/* 1. 让图片成为定位参照 */
.zoomable{
  position:relative;
  cursor:pointer;
  transition:opacity .2s;
}

/* 2. 放大镜图标（用纯 CSS 画） */
.zoom-icon{
  position:absolute;
  top:8px;
  right:8px;
  width:28px;
  height:28px;
  background:rgba(0,0,0,.45);
  border-radius:50%;
  display:flex;
  align-items:center;
  justify-content:center;
  opacity:0;
  transition:opacity .2s;
  pointer-events:none;   /* 不挡住点击 */
  z-index:2;
}
.zoom-icon::before{
  content:'';
  width:10px;
  height:10px;
  border:2px solid #fff;
  border-radius:50%;
  transform:translate(-2px,-2px);
}
.zoom-icon::after{
  content:'';
  width:2px;
  height:6px;
  background:#fff;
  transform:translate(3px,3px) rotate(-45deg);
}

/* 3. 鼠标悬停显示图标 */
.zoomable:hover .zoom-icon{ opacity:1; }

/* 4. 全屏遮罩（同上一版） */
.overlay{
  position:fixed;left:0;top:0;width:100%;height:100%;
  background:rgba(0,0,0,.8);display:flex;align-items:center;
  justify-content:center;z-index:9999;cursor:zoom-out;
  transition:opacity .3s;opacity:0;visibility:hidden;
}
.overlay img{ max-width:90%;max-height:90%;border-radius:4px; }

.conference-image{
  /* 固定比例 16:9，可自行改 4:3 / 1:1 等 */
  aspect-ratio: 16 / 9;   /* 现代浏览器推荐写法 */
  width: 100%;            /* 让它随父级宽度自适应 */
  max-width: 520px;       /* 想要定宽就写死，也可用 100% */
  overflow: hidden;       /* 超出裁剪 */
  position: relative;
}

.conference-image img{
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;      /* 关键：铺满 + 保持比例 + 居中裁剪 */
  object-position: center;
}
        /* 页脚 */
        footer {
            text-align: center;
            padding: 25px;
            color: #7f8c8d;
            font-size: 0.9rem;
            background: #f8f9fa;
        }
        
        /* 响应式设计 */
        @media (max-width: 768px) {
            section {
                padding: 30px 20px;
            }
            
            .banner h1 {
                font-size: 2rem;
            }
            
            .banner p {
                font-size: 1rem;
            }
            
            .info-box {
                flex-direction: column;
            }
            
            .schedule-item {
                flex-direction: column;
            }
            
            .schedule-time {
                margin-bottom: 10px;
            }
            
            h2 {
                font-size: 1.6rem;
            }
        }
        
        @media (max-width: 480px) {
            .banner {
                padding: 40px 15px;
            }
            
            .banner h1 {
                font-size: 1.7rem;
            }
            
            .sponsors {
                grid-template-columns: repeat(2, 1fr);
            }
            .conference-grid {
                grid-template-columns: 1fr;
            }
            .floating-btn {
                width: 50px;
                height: 50px;
                bottom: 20px;
                right: 20px;
            }
        }