/* 横幅 */
  /* Banner轮播样式 */
  .banner {
    
    position: relative;
    width: 100%;
    height: 200px;
    padding: 15px;
    overflow: hidden;
  }
  
  .banner-slider {
    width: 100%;
    height: 100%;
    position: relative;
  }
  
  .slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 0.5s ease-in-out;
  }
  
  .slide.active {
    opacity: 1;
  }
  
  .slide img {
    width: 100%;
    height: 100%;
    border-radius: 10px;
    object-fit: cover;
  }
  
  .banner-indicators {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 8px;
  }
  
  .indicator {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    cursor: pointer;
  }
  
  .indicator.active {
    background: #fff;
  }
  .banner::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 100 100'%3E%3Ccircle cx='50' cy='50' r='40' fill='rgba(255,255,255,0.1)'/%3E%3C/svg%3E") repeat;
    opacity: 0.5;
  }
  .banner-logo {
    display: flex;
    align-items: center;
    margin-bottom: 10px;
    position: relative;
    z-index: 1;
  }
  .logo-icon {
    font-size: 20px;
    margin-right: 5px;
  }
  .banner-title {
    font-size: 24px;
    font-weight: bold;
    text-align: center;
    letter-spacing: 2px;
    position: relative;
    z-index: 1;
  }
  
  /* 活动区域 */
  .activity-section {
    padding: 0 15px;
  }
  .section-title {
    font-size: 18px;
    color: #333;
    padding: 15px;
  }
  
  /* 活动卡片 */
  .activity-card {
    background: #fff;
    border-radius: 10px;
    padding: 15px;
    margin-bottom: 15px;
    
    gap: 15px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
  }
  .activity-first{
    display: flex;
  }
  .card-img-placeholder {
    width: 100px;
    height: 100px;
    background: #e5e5e5;
    border-radius: 8px;
    margin: 0px 20px 10px 0px;
    flex-shrink: 0;
  }
  .card-img-placeholder img {
    width: 100%;
    height: 100%;
    border-radius: 8px;
    object-fit: cover;
  }
  .card-title {
    font-size: 16px;
    margin-bottom: 5px;
    color: #333;
  }
  .card-desc {
    font-size: 14px;
    color: #666;
    line-height: 1.5;
    margin-bottom: 10px;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
  }
  .countdown {
    font-size: 16px;
    color: #666;
    margin-bottom: 5px;
  }
  .countdown-item {
    background-color: pink;
    color: #ff4b4b;
    font-weight: bold;
  }
  .join-btn {
    background: #ff4b4b;
    color: #fff;
    border: none;
    padding: 8px 15px;
    border-top-left-radius: 20px;
    border-bottom-left-radius: 20px;
    cursor: pointer;
    font-size: 14px;
    margin-right: -15px;
  }
  .join-btn:hover {
    background: #ff3333;
  }
  
  /* 底部导航 */
  .bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: #fff;
    display: flex;
    justify-content: space-around;
    padding: 10px 0;
    box-shadow: 0 -2px 5px rgba(0,0,0,0.1);
  }
  .nav-item {
    width: 50px;
    display: flex;
    flex-direction: column;
    align-items: center;
    color: #666;
    text-decoration: none;
    font-size: 12px;
  }
  .nav-item.active {
    color: #00c9b7;
  }
  .nav-item span:first-child {
    font-size: 20px;
    margin-bottom: 3px;
  }
  .activity-second {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-top: 10px;
  }

  .countdown-timer {
    color: rgba(0, 0, 0, 0.4);
  }
  .countdown-timer span{
    width: 20px;
    height: 20px;
    border-radius: 4px;
    opacity: 1;
    background: #FFE0DC;
    color: #FF4B4B;
    font-size: 16px;
    font-weight: bold;
    text-align: center;
  }