:root {
      --primary-bg: #000028;
      --particle-color: #00ffff;
      --accent-color: #00aaff;
      --glass-bg: rgba(255, 255, 255, 0.1);
      --glass-border: rgba(255, 255, 255, 0.2);
    }

    body {
      margin: 0;
      height: 100vh;
      position: relative;
      overflow: hidden;
      font-family: 'Segoe UI', sans-serif;
      background: var(--primary-bg);
      color: white;
      display: flex;
      flex-direction: column;
      max-width: 100%;
      background-repeat: no-repeat;
      background-position: center center;
      background-size: cover;
    }

    /* 顶部LOGO */
    .logo-container {
      position: absolute;
      top: 1rem;
      right: 1rem;
      z-index: 10;
      width: 10rem;
      text-align: right;
    }

    .logo-container img {
      width: 100%;
    }

    /* 内容层样式 */
    .content {
      position: relative;
      z-index: 3;
      padding: 1.2rem;
      text-align: center;
      margin: auto;
      text-shadow: 0 1px 3px rgba(0, 0, 0, 0.8);
      max-width: 800px;
      display: flex;
      flex-direction: column;
      justify-content: center;
      /*align-items: center;*/
      height: 100vh;
      box-sizing: border-box;
    }

    h1 {
      font-size:1.8rem;
      margin-bottom: .2rem;
      /*background: linear-gradient(to right, #fff, var(--accent-color));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      text-shadow: 0 0 15px rgba(0, 170, 255, 0.6);*/
      color:#fff;
      text-shadow: 2px 2px 2px #000;
      text-align:left;
      letter-spacing: .1rem;
    }

    .entitle {
      text-transform: uppercase;
      margin-bottom:4rem;
      font-weight: bold;
      font-size: .85rem;
    }

    /* 按钮容器 */
    .button-container {
      display: flex;
      flex-direction: column;
      gap: 20px;
      margin-top:2rem;
      width: 14rem;
      margin-left: auto;
      margin-right: auto;
    }

    /* 按钮样式 */
    .btn {
      padding: 1rem 1.5rem;
      font-size: 1.3rem;
      border-radius: 2rem;
      border: 1px solid var(--glass-border);
      cursor: pointer;
      transition: all 0.3s ease;
      position: relative;
      overflow: hidden;
      background: var(--glass-bg);
      backdrop-filter: blur(8px);
      color: white;
      text-decoration: none;
      text-transform: uppercase;
      letter-spacing: 0.2rem;
      font-weight: 600;
      text-align: center;
      animation: float 3s infinite ease-in-out;
    }

    .btn:hover {
      transform: translateY(-4px) scale(1.03);
      box-shadow: 0 8px 15px rgba(0, 100, 255, 0.5);
      background: rgba(0, 120, 255, 0.2);
      animation: none;
    }

    .btn:active {
      transform: translateY(1px) scale(0.98);
      box-shadow: 0 2px 3px rgba(0, 0, 0, 0.3);
    }

    .btn i {
      width: 1.5rem;
      display: block;
      float: left;
      padding-right: 0.8rem;
    }

    .btn i img {
      width: 100%;
    }

    @keyframes float {
      0%, 100% {
        transform: translateY(0);
      }
      50% {
        transform: translateY(-8px);
      }
    }

    /* 响应式调整 */
    @media (min-width: 768px) {
      h1 {
        font-size:2.4rem;
        text-align: left;
      }

      .button-container {
        gap:30px;
        max-width:100%;
      }

      .btn {
        padding: 16px;
        font-size: 1.1rem;
      }
    }
.switch-language {
  margin: 2rem 1rem;
  line-height: 1;
  position: absolute;
  right: 0;
  bottom: 0;
  z-index: 9;
  font-weight: bold; }
  .switch-language span {
    display: inline-block;
    vertical-align: middle; }
  .switch-language .txt {
    /*border: solid 2px transparent;*/
    border-radius: 10rem;
    margin: 0 .5em;
    text-shadow: 2px 2px 2px #000;  
  }
    .switch-language .txt.active {
    /*border-color: #fff;*/
    padding: .375em 1em; 
    background: var(--glass-bg);
    backdrop-filter: blur(8px);
    border: 1px solid var(--glass-border);    
    }