body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #030b1c
}

nav {
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 8%;
}

nav a {
    color: white;
    margin: 0 1rem;
    text-decoration: none;
    font-size: 20px;
    font-weight: 400;
    padding: 10px;
}

nav a:hover {
    transition: box-shadow .3s, border .3s, background-color .3s, color .3s;
    background: url('img/underline.png') no-repeat bottom;
}

nav img {
    width: 177px;
    height: 48px;
    vertical-align: middle;
    float: left;
    margin-right: 1rem;

}

.hero {
    color: white;
    background: url('img/banner.png') no-repeat center center;
    background-size: cover;
    padding: 5rem 1rem;
    height: 800px;
    text-align: center;
}

.content {
    height: 100%;
}


.section {
    background-color: #16a085;
    color: white;
    margin: 1rem 0;
    padding: 2rem;
    text-align: center;
}


@keyframes flicker {
    0% {
        opacity: 1;
    }

    50% {
        opacity: 0;
    }

    100% {
        opacity: 1;
    }
}

.heroflick {
    width: 100%;
    height: 2px;
    background: url('img/banner横线.png') no-repeat center center;
    background-size: cover;
    animation: flicker 1s infinite;
}

.start-banner {
    height: 260px;
    width: 100%;
    align-items: center;
    color: #FFF;
    display: flex;
    flex-direction: column;
    align-content: center;
    justify-content: space-around;
    background-color: #030b1c;
}

.start-banner span {
    font-size: 32px;
}

.start-banner b {
    font-size: 40px;
    color: #00e3a5;
}

.section-1 {
    text-align: center;
}

.title-num {
    margin: 0 20%;
    color: #FFF;
    display: flex;
    justify-content: space-between;
}

.dt-itme {
    width: 200px;
    display: flex;
    flex-direction: column;
    align-content: center;
    justify-content: center;
}

.dt-itme b {
    text-align: center;
    font-size: 40px;
    color: #00e3a5;
}

.dt-itme span {
    text-align: center;
    color: #686969;
}

.section-2 {
    height: 580px;
    overflow: hidden;
    background: url('img/穿越开启数的世界.png') no-repeat center center;
    text-align: center;
}

.title {
    width: 100%;
    font-size: 40px;
    color: #FFF;
    margin-top: 100px;
    text-align: center;
}

.color-transition {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, #2A5C8A, #E67E22);
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.5s;
    z-index: -1;
    /* 放在最底层 */
}

/* 基础样式 */
.site-footer {
    background: #030b1c; /* 深色背景 */
    color: #a0a8b3; /* 浅灰文字 */
    padding: 4rem 2rem 2rem;
    font-family: 'Helvetica Neue', sans-serif;
  }
  
  .footer-content {
    display: flex;
    width: 100%;
    justify-content: space-evenly;
    padding-bottom: 3rem;
    border-bottom: 1px solid #2d3239; /* 分隔线 */
  }
  
  .footer-column {
    padding: 0 1rem;
    cursor: pointer;
    color: #FFF;
  }
  
  .footer-title {
    color: #ffffff; /* 标题白色 */
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
    letter-spacing: 0.5px;
  }
  
  .footer-link {
    display: block;
    color: inherit;
    text-decoration: none;
    margin-bottom: 0.8rem;
    transition: color 0.3s ease;
  }
  
  .footer-link:hover {
    color: #ffffff; /* 悬停变白 */
  }
  
  /* 社交媒体图标 */
  .social-icons {
    display: flex;
    gap: 1rem;
    margin-top: 1.5rem;
  }
  
  .icon-link {
    color: #a0a8b3;
    font-size: 1.5rem;
    transition: transform 0.3s ease;
  }
  
  .icon-link:hover {
    color: #ffffff;
    transform: translateY(-2px);
  }
  
  /* 底部版权声明 */
  .footer-bottom {
    text-align: center;
    padding-top: 2rem;
    margin-top: 2rem;
    font-size: 0.9rem;
    color: #6b7280;
  }
  
  /* 响应式设计 */
  @media (max-width: 768px) {
    .footer-content {
      grid-template-columns: 1fr;
      text-align: center;
    }
  
    .social-icons {
      justify-content: center;
    }
  
    .footer-column {
      margin-bottom: 2rem;
    }
  }