* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
        }
        
        body {
            background: #ffffff;
            color: #333;
            line-height: 1.6;
            padding: 20px;
            min-height: 100vh;
        }
        
        .container {
            max-width: 1200px;
            margin: 0 auto;
        }
        
        header {
            text-align: center;
            margin-bottom: 40px;
            padding: 30px;
            background: linear-gradient(135deg, #c0392b, #e74c3c);
            border-radius: 15px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
            color: white;
            position: relative;
            overflow: hidden;
        }
        
        header::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, rgba(255,255,255,0) 70%);
            transform: rotate(30deg);
        }
        
        h1 {
            margin-bottom: 10px;
            font-size: 2.8rem;
            text-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
            position: relative;
        }
        
        .subtitle {
            font-size: 1.3rem;
            opacity: 0.9;
            position: relative;
        }
        
        .stats {
            display: flex;
            justify-content: space-around;
            flex-wrap: wrap;
            margin-bottom: 30px;
            gap: 20px;
        }
        
        .stat-card {
            background: white;
            padding: 25px 20px;
            border-radius: 15px;
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
            text-align: center;
            flex: 1;
            min-width: 180px;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            position: relative;
            overflow: hidden;
        }
        
        .stat-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 5px;
            background: linear-gradient(to right, #e74c3c, #c0392b);
        }
        
        .stat-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
        }
        
        .stat-value {
            font-size: 2.5rem;
            font-weight: bold;
            color: #e74c3c;
            margin-bottom: 5px;
        }
        
        .stat-label {
            color: #7f8c8d;
            font-size: 1rem;
        }
        
        .timeline {
            position: relative;
            max-width: 1200px;
            margin: 0 auto;
        }
        
        /* 时间轴中心线 */
        .timeline::after {
            content: '';
            position: absolute;
            width: 6px;
            background: linear-gradient(to bottom, #e74c3c, #c0392b);
            top: 0;
            bottom: 0;
            left: 50%;
            margin-left: -3px;
            border-radius: 10px;
            box-shadow: 0 0 10px rgba(231, 76, 60, 0.5);
        }
        
        /* 时间轴项容器 */
        .timeline-item {
            padding: 10px 40px;
            position: relative;
            width: 50%;
            opacity: 0;
            transform: translateY(20px);
            transition: all 0.5s ease;
        }
        
        .timeline-item.visible {
            opacity: 1;
            transform: translateY(0);
        }
        
        /* 左侧项 */
        .left {
            left: 0;
        }
        
        /* 右侧项 */
        .right {
            left: 50%;
        }
        
        /* 时间轴项内容 */
        .content {
            padding: 25px;
            background: white;
            position: relative;
            border-radius: 15px;
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            border-left: 5px solid #e74c3c;
        }
        
        .content:hover {
            transform: translateY(-8px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
        }
        
        /* 时间轴项箭头 */
        .timeline-item::after {
            content: '';
            position: absolute;
            width: 0;
            height: 0;
            top: 25px;
            z-index: 1;
            box-shadow: 0 0 10px rgba(231, 76, 60, 0.5);
        }
        
        .left::after {
            right: -10px;
            border-top: 12px solid transparent;
            border-bottom: 12px solid transparent;
            border-left: 12px solid #e74c3c;
        }
        
        .right::after {
            left: -10px;
            border-top: 12px solid transparent;
            border-bottom: 12px solid transparent;
            border-right: 12px solid #e74c3c;
        }
        
        /* 时间标记 */
        .date {
            font-weight: bold;
            color: #e74c3c;
            margin-bottom: 10px;
            font-size: 1.3rem;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        
        /* 培训班标题 */
        .title {
            font-size: 1.2rem;
            margin-bottom: 8px;
            color: #2c3e50;
            line-height: 1.4;
        }
        
        /* 培训班地点/机构 */
        .location {
            color: #7f8c8d;
            font-style: italic;
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        
        /* 年份分隔 */
        .year-marker {
            text-align: center;
            margin: 50px 0;
            position: relative;
            z-index: 2;
        }
        
        .year {
            display: inline-block;
            background: linear-gradient(135deg, #e74c3c, #c0392b);
            color: white;
            padding: 12px 30px;
            border-radius: 30px;
            font-weight: bold;
            font-size: 1.6rem;
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
            position: relative;
            overflow: hidden;
        }
        
        .year::before {
            content: '';
            position: absolute;
            top: -10px;
            left: -10px;
            width: 20px;
            height: 20px;
            background: rgba(255, 255, 255, 0.2);
            border-radius: 50%;
        }
        
        /* 响应式设计 */
        @media screen and (max-width: 768px) {
            .timeline::after {
                left: 31px;
            }
            
            .timeline-item {
                width: 100%;
                padding-left: 70px;
                padding-right: 25px;
            }
            
            .right {
                left: 0;
            }
            
            .left::after, .right::after {
                left: 21px;
                border-left: 12px solid #e74c3c;
                border-right: none;
            }
            
            .right::after {
                border-left: 12px solid #e74c3c;
            }
            
            h1 {
                font-size: 2.2rem;
            }
            
            .stat-card {
                min-width: 140px;
            }
        }
        
        /* 页脚 */
        footer {
            text-align: center;
            margin-top: 60px;
            padding: 25px;
            color: #7f8c8d;
            background: white;
            border-radius: 15px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
        }
        
        /* 装饰元素 */
        .decoration {
            position: absolute;
            width: 100px;
            height: 100px;
            border-radius: 50%;
            opacity: 0.1;
            z-index: 0;
        }
        
        .dec-1 {
            top: 10%;
            left: 5%;
            background: #e74c3c;
            animation: float 8s infinite ease-in-out;
        }
        
        .dec-2 {
            top: 20%;
            right: 10%;
            background: #c0392b;
            animation: float 10s infinite ease-in-out;
            animation-delay: 1s;
        }
        
        .dec-3 {
            bottom: 20%;
            left: 10%;
            background: #d35400;
            animation: float 12s infinite ease-in-out;
            animation-delay: 2s;
        }
        
        @keyframes float {
            0%, 100% { transform: translateY(0) rotate(0deg); }
            50% { transform: translateY(-20px) rotate(180deg); }
        }