<template>
  <div class="home-wrapper">
    <swiper :options="swiperOption" class="bg-swiper">
      <swiper-slide class="bg-slide">
        <img src="@/assets/51/back1.png" alt="背景1" class="bg-img">
      </swiper-slide>
      <swiper-slide class="bg-slide">
        <img src="@/assets/51/back2.png" alt="背景2" class="bg-img">
      </swiper-slide>
      <swiper-slide class="bg-slide">
        <img src="@/assets/51/back3.png" alt="背景3" class="bg-img">
      </swiper-slide>
    </swiper>

    <div class="j-button">
      <button class="downbtn" @click="goShare" aria-label="前往分享页面"></button>
    </div>
  </div>
</template>

<script>
import { swiper, swiperSlide } from 'vue-awesome-swiper'
import 'swiper/dist/css/swiper.css'

export default {
  components: { swiper, swiperSlide },
  data() {
    return {
      swiperOption: {
        autoplay: {
          delay: 2000, // 切换时间（毫秒）
          disableOnInteraction: false
        },
        loop: true,
        effect: 'fade',
        fadeEffect: { crossFade: true }, // 关键：避免白屏
        pagination: false,
        navigation: false
      }
    }
  },
  mounted() {
    // 手动触发51LA统计（确保页面加载被统计）
    if (window._51la) {
      window._51la.trackPageView(); // 51LA 全局方法，用于手动统计页面
    }
  },
  methods: {
    goShare() {
      this.$router.push({ name: 'share', query: { from: '8' } })
    }
  }
}
</script>

<style scoped>
/* 轮播容器全屏覆盖 */
.bg-swiper {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 1;
  /* 去除默认边距，避免白边 */
  margin: 0;
  padding: 0;
}

/* 轮播项全屏 */
.bg-slide {
  width: 100%;
  height: 100%;
  overflow: hidden; /* 隐藏超出容器的部分 */
}

/* 核心：图片自动铺满且保持比例 */
.bg-img {
  width: 100%;
  height: 100%;
  /* 关键属性：铺满容器，裁剪多余部分，保持比例 */
  object-fit: cover;
  /* 可选：图片居中显示（默认就是居中） */
  object-position: center;
}
.j-button {
  position: fixed;
  left: 0;
  right: 0;
  margin: 0 auto;
  bottom: 70px;
  width: 300px;
  height: 60px;
  background: url("@/assets/download51.png") no-repeat;
  background-size: 100% 100%;
  z-index: 10;
}
.downbtn {
  width: 100%;
  height: 100%;
  border: none;
  background: transparent;
  cursor: pointer;
}
</style>
