时间线上下分布

<template>
  <div class="custom-timeline-container">
    <div class="custom-timeline">
      <div 
        v-for="(item, index) in timelineData" 
        :key="index" 
        class="custom-timeline-item"
        :class="{'custom-top': index % 2 === 0, 'custom-bottom': index % 2 !== 0}"
      >
        <div class="custom-timeline-node">
          <div class="node-circle"></div>
        </div>
        <div class="custom-timeline-wrapper">
          <div class="custom-timeline-content">
            <div class="custom-timestamp">{{ item.time }}</div>
            <el-card shadow="hover" class="custom-card">
              <h4>{{ item.title }}</h4>
              <p>{{ item.content }}</p>
              <el-tag v-if="item.tag" :type="item.tagType">{{ item.tag }}</el-tag>
            </el-card>
          </div>
        </div>
      </div>
    </div>
  </div>
</template>

<script setup>
import { ref } from 'vue';

const timelineData = ref([
  { 
    time: '2023 Q1', 
    title: '项目启动', 
    content: '完成需求分析和团队组建',
    tag: '已完成',
    tagType: 'success'
  },
  { 
    time: '2023 Q2', 
    title: '原型设计', 
    content: '完成产品原型和UI设计',
    tag: '已完成',
    tagType: 'success'
  },
  { 
    time: '2023 Q3', 
    title: '开发阶段', 
    content: '核心功能开发与单元测试',
    tag: '进行中',
    tagType: 'primary'
  },
  { 
    time: '2023 Q4', 
    title: '测试阶段', 
    content: '系统集成测试和性能优化',
    tag: '待开始',
    tagType: 'info'
  },
  { 
    time: '2024 Q1', 
    title: '产品发布', 
    content: '正式版本发布和市场推广',
    tag: '规划中',
    tagType: 'warning'
  }
]);
</script>

<style scoped>
.custom-timeline-container {
  width: 100%;
  overflow-x: auto;
  padding: 60px 0;
}

.custom-timeline {
  display: flex;
  justify-content: center;
  position: relative;
  min-width: 1000px;
  padding: 0 50px;
}

.custom-timeline::before {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  height: 2px;
  background: linear-gradient(90deg, #409eff, #67c23a);
  z-index: 0;
}

.custom-timeline-item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  position: relative;
  padding: 0 10px;
}

.custom-top {
  align-items: flex-start;
}

.custom-bottom {
  align-items: flex-end;
}

.custom-timeline-node {
  display: flex;
  justify-content: center;
  position: relative;
  z-index: 1;
  margin-bottom: 15px;
}

.custom-bottom .custom-timeline-node {
  margin-top: 15px;
  margin-bottom: 0;
}

.node-circle {
  width: 18px;
  height: 18px;
  border: 3px solid #409eff;
  border-radius: 50%;
  background: white;
  box-shadow: 0 0 0 4px rgba(64, 158, 255, 0.2);
  transition: all 0.3s;
}

.custom-timeline-item:hover .node-circle {
  transform: scale(1.2);
  box-shadow: 0 0 0 6px rgba(64, 158, 255, 0.3);
}

.custom-timeline-wrapper {
  width: 200px;
}

.custom-timeline-content {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.custom-top .custom-timeline-content {
  margin-bottom: 20px;
}

.custom-bottom .custom-timeline-content {
  margin-top: 20px;
}

.custom-timestamp {
  font-weight: bold;
  color: #409eff;
  margin-bottom: 10px;
  font-size: 15px;
}

.custom-card {
  border-radius: 8px;
  padding: 15px;
  text-align: center;
  transition: transform 0.3s;
  width: 100%;
}

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

.custom-card h4 {
  margin: 0 0 10px 0;
  font-size: 16px;
  color: #303133;
}

.custom-card p {
  margin: 0 0 10px 0;
  font-size: 14px;
  color: #606266;
}

.custom-timeline-item::after {
  content: '';
  position: absolute;
  top: 50%;
  left: calc(100% - 10px);
  width: 20px;
  height: 2px;
  background: #e4e7ed;
  z-index: 0;
}

.custom-timeline-item:last-child::after {
  display: none;
}

/* 响应式设计 */
@media (max-width: 992px) {
  .custom-timeline {
    flex-direction: column;
    min-width: auto;
    padding: 0 20px;
  }
  
  .custom-timeline::before {
    left: 20px;
    top: 0;
    bottom: 0;
    width: 2px;
    height: auto;
  }
  
  .custom-timeline-item {
    flex-direction: row;
    padding: 20px 0;
    align-items: flex-start !important;
  }
  
  .custom-timeline-node {
    margin: 0 15px 0 0 !important;
  }
  
  .custom-timeline-wrapper {
    width: calc(100% - 50px);
    text-align: left;
  }
  
  .custom-timeline-content {
    align-items: flex-start;
    margin: 0 !important;
  }
  
  .custom-card {
    text-align: left;
  }
  
  .custom-timeline-item::after {
    display: none;
  }
}
</style>