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                    <span class="recommended-card__count">128</span>
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          </div>
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      </div>

      <!-- 侧边栏滚动按钮 -->
      <div class="sidebar">
        <div class="sidebar-btn sidebar-btn--area">
          <svg class="iconpark-icon">
            <use href="#fen-qu"></use>
          </svg>
          <span class="sidebar-btn__text">分区</span>
        </div>
        <div class="sidebar-btn sidebar-btn--old">回到旧版</div>
        <div class="sidebar-btn sidebar-btn--service">
          <svg class="iconpark-icon">
            <use href="#ke-fu"></use>
          </svg>
          <span class="sidebar-btn__text">客服</span>
        </div>
        <div class="sidebar-btn sidebar-btn--beta">前往内测</div>
        <div class="sidebar-btn sidebar-btn--top">
          <svg class="iconpark-icon">
            <use href="#ding-bu"></use>
          </svg>
          <span class="sidebar-btn__text">顶部</span>
        </div>
      </div>
    </div>
  </body>
</html>

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base.css

base.css

css

* {
  margin: 0;
  padding: 0;
}

li {
  list-style: none;
}

a {
  text-decoration: none;
  color: #000;
  cursor: pointer;
}

a:focus,
a:hover,
a:active {
  /* 去除轮廓 */
  outline: none 0;
}

body {
  /* background-color: skyblue; */
  font-size: 14px;
}

.iconpark-icon {
  width: 1em;
  height: 1em;
  vertical-align: -0.15em;
  fill: currentColor;
  overflow: hidden;
}

input {
  /* 去掉边框 */
  border: 0 none;
  /* 去除聚焦时的轮廓 */
  outline-style: none;
}

img {
  /* 使图片在垂直方向上与周围的元素居中对齐，从而去除图片的默认上下间距 */
  vertical-align: middle;
}

button {
  /* 去除按钮的边框 */
  border: none;
  /* 去除聚焦时的轮廓 */
  outline: none;
}

index.css

css

/**
 * 导航区域
 */
.bili-nav {
  display: flex;
  align-items: center;
  width: 100%;
  padding: 0 24px;

  box-sizing: border-box;
}

/**
 * 左侧入口
 */
.left-entry {
  display: flex;
}

.left-entry__link {
  display: flex;
  align-items: center;
  height: 64px;
  color: #fff;
  margin-right: 15px;

  svg {
    margin-right: 6px;
    width: 18px;
    height: 18px;
    fill: none;
    overflow: hidden;
  }
}

/**
 * 中间搜索区域
 */
.center-search {
  /* 在主轴方向上的增长比例，值为 1 表示占满整个可用空间，用于实现自适应宽度的布局效果 */
  flex: 1;
  height: 40px;
  padding: 0 48px 0 4px;
  border-radius: 8px;
  border: 1px #e3e5e7 solid;
  background-color: #f1f2f3;

  display: flex;
  align-items: center;
  position: relative;

  &:hover {
    background-color: #fff;
  }
}

.center-search__content {
  display: flex;
  height: 20px;
  width: 100%;
  padding: 0 8px;
}

.center-search__input {
  flex: 1;
  background-color: transparent;

  line-height: 20px;
  overflow: hidden;
  padding-right: 8px;
}

.center-search__button {
  position: absolute;
  top: 4px;
  right: 7px;

  display: flex;
  align-items: center;
  justify-content: center;

  width: 32px;
  height: 32px;
  line-height: 32px;
  border-radius: 6px;
  cursor: pointer;

  transition: background-color 0.5s ease-in-out;

  &:hover {
    background-color: #e3e4e5;
  }

  svg {
    width: 17px;
    height: 17px;
  }
}

/**
 * 右侧入口
 */
.right-entry {
  margin-left: 10px;
  display: flex;
  align-items: center;
}

.right-entry__avatar {
  width: 50px;
  height: 50px;
  padding-right: 10px;
  position: relative;

  a {
    position: absolute;
    top: 6px;
    left: 10px;
    width: 36px;
    height: 36px;
    line-height: 36px;
    border-radius: 50%;
    background-color: #00aeec;
    display: flex;
    justify-content: center;
    border: 2px #ffffff solid;
  }
}

.right-entry__item {
  min-width: 50px;
  margin-right: 4px;

  a {
    display: flex;
    flex-direction: column;
    align-items: center;
    color: #ffffff;

    svg {
      width: 20px;
      height: 20px;
    }

    span {
      font-size: 13px;
    }
  }
}

.right-entry__upload {
  a {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-left: 10px;
    width: 90px;
    height: 34px;
    line-height: 34px;
    border-radius: 8px;
    color: #ffffff;
    background-color: #fb7299;
  }

  span {
    margin-left: 5px;
  }
}

/**
 * banner 区域
 */
.bili-nav {
  /* 元素被放置在其包含块的顶部 */
  position: absolute;
  top: 0;
  /* 元素将在页面上的大多数其他元素之上 */
  z-index: 1000;
}

.bili-banner {
  /* 设置元素的定位方式为相对定位。相对定位元素的定位是相对于其在正常流中的初始位置 */
  position: relative;
  width: 100%;
  height: 155px;
  overflow: hidden;
}

.bili-banner__image {
  /* 设置为绝对定位，覆盖整个.bili-banner 元素，并使用 object-fit 属性来等比例缩放图片 */
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  /* 图片等比例缩放：替换内容在保持其宽高比的同时填充元素的整个内容框。如果对象的宽高比不匹配内容框的宽高比，那么该对象将被剪裁以填充内容框 */
  object-fit: cover;
}

.bili-banner__logo {
  /* 使用 flexbox 布局将元素放置在元素底部，并设置宽度和高度以及内边距 */
  display: flex;
  align-items: flex-end;

  width: 100%;
  height: 100%;
  padding: 0 64px;

  a {
    /* 设置为相对定位，并设置宽度和高度以及下边距 */
    position: relative;
    width: 162px;
    height: 78px;
    margin-bottom: 18px;
  }
}

.bili-banner__mask {
  /* 设置为绝对定位，并覆盖整个.bili-banner 元素，并使用线性渐变设置背景 */
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(rgba(0, 0, 0, 0.4), transparent);
}

/**
 * 频道区域
 */
.bili-channel {
  display: flex;
  align-items: center;

  height: 110px;
  padding: 0 60px;
}

/**
 * 左侧频道列表图标
 */
.left-channel-icons {
  display: flex;

  a {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;

    margin-right: 24px;
  }
}

.left-channel-icons__icon-bg {
  display: flex;
  align-items: center;
  justify-content: center;

  width: 46px;
  height: 46px;
  border-radius: 50%;
  margin-bottom: 6px;

  svg {
    width: 25px;
    height: 25px;
  }
}

.left-channel-icons__icon-bg--dynamic {
  background-color: #ff9212;
}

.left-channel-icons__icon-bg--popular {
  background-color: #f07775;
}

.left-channel-icons__icon-bg--channel {
  background-color: #59ca73;
}

/**
 * 右侧频道内容
 */
.right-channel-container {
  display: flex;
  width: 100%;
}

/* 左侧网格 */
.right-channel-container__left {
  display: grid;
  grid-template-columns: repeat(11, 1fr);
  gap: 10px;

  width: 100%;

  a {
    height: 26px;
    line-height: 26px;
    color: #61666d;
    background-color: #f6f7f8;
    border: 1px #f1f2f3 solid;
    border-radius: 6px;
    text-align: center;
  }
}

/* 右侧网格 */
.right-channel-container__right {
  flex-shrink: 0;

  display: grid;
  /* grid-template-columns: repeat(3, 1fr); */
  grid-template-rows: repeat(2, 1fr);
  grid-auto-flow: column;
  row-gap: 10px;

  width: 240px;
  margin-left: 30px;
  border-left: 1px solid #e3e5e7;

  a {
    display: flex;
    align-items: center;
    justify-content: flex-end;

    width: 100%;
    height: 28px;
    letter-spacing: 2px;
  }

  svg {
    width: 20px;
    height: 20px;
    margin-right: 4px;
    fill: #61666d;
  }

  span {
    color: #61666d;
  }
}

/**
 * 主体
 */
.main {
  width: 100%;
  padding: 0 60px;
  box-sizing: border-box;
}

/**
 * 轮播图
 */
.carousel {
  position: relative;

  grid-row: 1/3;
  grid-column: 1/3;
  border-radius: 6px;
  overflow: hidden;

  img {
    width: 100%;
  }
}

/* 轮播图遮罩层 */
.carousel__mask {
  position: absolute;
  left: 0;
  top: 0;

  width: 100%;
  height: 392px;
  border-radius: 6px;
  background: linear-gradient(0, #524c46 23%, transparent 35%);
}

/* 轮播图工具栏 */
.carousel__tools {
  position: absolute;
  left: 0;
  bottom: 94px;

  width: 100%;
  padding: 0 15px;
  box-sizing: border-box;

  a {
    display: flex;
    margin-bottom: 10px;
    font-size: 18px;
    color: #fff;
  }
}

/* 轮播图指示器列表 */
.carousel__indicators {
  display: flex;
}

.carousel__indicator {
  width: 8px;
  height: 8px;
  margin: 4px;
  border-radius: 50%;
  background-color: #fff6;
  cursor: pointer;
}

.carousel__indicator--active {
  width: 14px;
  height: 14px;
  margin: 1px;
  background-color: #fff;
}

/* 轮播图按钮区域 */
.carousel__buttons {
  position: absolute;
  right: 15px;
  bottom: 23px;
}

.carousel__button {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  margin-right: 8px;

  display: inline-flex;
  align-items: center;
  justify-content: center;

  background-color: #ffffff1a;
  border: none;
  cursor: pointer;
}

.carousel__button--next {
  margin-right: 0;
}

.carousel__button svg {
  width: 12px;
  height: 12px;
  color: #fff;
}

/**
 * 推荐列表
 */
.recommended-container {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
  width: 100%;
}

/* 视频封面图片区 */
.recommended-card a {
  transition: color 0.2s linear;
  cursor: pointer;
}

.recommended-card a:hover {
  color: #00aeec;
}

.recommended-card__image {
  position: relative;
  border-radius: 6px;
  overflow: hidden;
}

.recommended-card__image img {
  width: 100%;
  height: 100%;
  vertical-align: middle;
}

/* 视频封面遮罩层 */
.recommended-card__mask {
  position: absolute;
  left: 0;
  bottom: 0;
  padding: 16px 8px 6px;
  box-sizing: border-box;

  width: 100%;
  height: 38px;
  background-image: linear-gradient(180deg, rgba(0, 0, 0, 0) 0%, rgba(0, 0, 0, 0.8) 100%);
  color: #fff;
  font-size: 13px;

  display: flex;
  align-items: center;
}

.recommended-card__stats {
  flex: 1;
  display: flex;
  align-items: center;
}

.recommended-card__stat {
  display: flex;
  align-items: center;
  margin-right: 12px;
}

.recommended-card__mask svg {
  width: 18px;
  height: 18px;
  color: #fff;
  margin-right: 2px;
}

/* 视频信息区 */
.recommended-card__info {
  margin-top: 10px;
}

.recommended-card__title {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  text-overflow: ellipsis;
  line-break: anywhere;

  padding-right: 16px;
  line-height: 22px;
  font-size: 15px;
  overflow: hidden;
  font-weight: 500;
  color: #18191c;
}

.recommended-card__meta {
  margin-top: 4px;
  display: flex;
  font-size: 13px;
}

.recommended-card__meta a {
  color: #9499a0;
  display: flex;
  align-items: center;
}

.recommended-card__meta svg {
  width: 17px;
  height: 17px;
  margin-right: 2px;
}

.recommended-card__date {
  margin-left: 4px;
}

/**
 * 侧边栏滚动按钮
 */
.sidebar {
  position: fixed;
  right: 12px;
  bottom: 40px;
}

.sidebar-btn {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;

  width: 40px;
  margin-top: 6px;
  padding: 8px 0 6px;
  box-sizing: border-box;

  border: 1px solid #e3e5e7;
  border-radius: 8px;
  background-color: #fff;
  font-size: 12px;
  text-align: center;
  cursor: pointer;

  svg {
    width: 24px;
    height: 24px;
  }
}

.sidebar-btn--old,
.sidebar-btn--beta {
  padding: 4px;
}

.sidebar-btn--top {
  margin-top: 12px;

  svg {
    width: 15px;
    height: 8px;
  }
}

.sidebar-btn__text {
  margin-top: 2px;
}

课程代码 ​

index.html ​

base.css ​

index.css ​

课程代码

index.html

base.css

index.css