* {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    
    html, body {
      height: 100%;
      font-family: "Microsoft YaHei", "Noto Sans SC", "PingFang SC", system-ui, -apple-system, sans-serif;
    }
    
    body {
      display: flex;
      align-items: center;
      justify-content: center;
      background: white;
      padding: 20px;
    }
    
    .container {
      text-align: center;
      max-width: 500px;
      width: 100%;
    }
    
    h1 {
      color: #2d5a5a;
      font-size: 48px;
      font-weight: 800;
      margin-bottom: 16px;
      text-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
      letter-spacing: 2px;
    }
    
    .subtitle {
      color: #666;
      font-size: 17px;
      margin-bottom: 50px;
      font-weight: 400;
      letter-spacing: 0.3px;
      line-height: 1.6;
    }
    
    .button-group {
      display: flex;
      flex-direction: column;
      gap: 20px;
      margin-bottom: 30px;
    }
    
    .choice-btn {
      background: white;
      border: none;
      border-radius: 20px;
      padding: 32px 48px;
      font-size: 22px;
      font-weight: 700;
      cursor: pointer;
      transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
      box-shadow: 0 10px 32px rgba(0,0,0,0.15);
      position: relative;
      overflow: hidden;
      text-decoration: none;
      display: block;
      color: #333;
      letter-spacing: 0.5px;
    }
    
    .choice-btn::before {
      content: '';
      position: absolute;
      top: 0;
      left: -100%;
      width: 100%;
      height: 100%;
      background: linear-gradient(90deg, transparent, rgba(255,255,255,0.8), transparent);
      transition: left 0.5s;
    }
    
    .choice-btn:hover::before {
      left: 100%;
    }
    
    .choice-btn:hover {
      transform: translateY(-6px) scale(1.02);
      box-shadow: 0 16px 48px rgba(0,0,0,0.25);
    }
    
    .choice-btn:active {
      transform: translateY(-3px) scale(1);
      box-shadow: 0 8px 24px rgba(0,0,0,0.18);
    }
    
    .btn-self {
      background: linear-gradient(135deg, #ffecd2 0%, #fcb69f 100%);
      color: #5a3e36;
    }
    
    .btn-friend {
      background: linear-gradient(135deg, #a8edea 0%, #fed6e3 100%);
      color: #2d5a5a;
    }

    .btn-newyear {
      background: linear-gradient(135deg, #ff4b2b 0%, #ff416c 100%);
      color: #fff;
    }

    .btn-blessings {
      background: linear-gradient(135deg, #fbc2eb 0%, #a6c1ee 100%);
      color: #3f3d56;
    }
    
    .emoji {
      font-size: 36px;
      margin-right: 14px;
      display: inline-block;
      animation: float 3s ease-in-out infinite;
      filter: drop-shadow(0 2px 8px rgba(0, 0, 0, 0.1));
    }
    
    .btn-self .emoji {
      animation-delay: 0s;
    }
    
    .btn-friend .emoji {
      animation-delay: 0.5s;
    }

    .btn-blessings .emoji {
      animation-delay: 1s;
    }
    
    @keyframes float {
      0%, 100% { 
        transform: translateY(0px) scale(1); 
      }
      50% { 
        transform: translateY(-8px) scale(1.05); 
      }
    }
    
    .footer {
      color: #999;
      font-size: 13px;
      margin-top: 40px;
      line-height: 1.6;
    }
    
    .credit {
      margin-top: 20px;
      padding-top: 20px;
      border-top: 1px solid #e0e0e0;
    }
    
    .credit a {
      color: #667eea;
      text-decoration: none;
      font-weight: 500;
      transition: all 0.3s ease;
    }
    
    .credit a:hover {
      color: #764ba2;
      text-decoration: underline;
    }

    .build-version {
      margin-top: 8px;
      font-size: 12px;
      color: #b3b3b3;
    }
    
    @media (max-width: 480px) {
      h1 {
        font-size: 32px;
      }
      
      .choice-btn {
        padding: 24px 32px;
        font-size: 18px;
      }
      
      .emoji {
        font-size: 28px;
      }
    }
    
    /* 加载动画 */
    @keyframes fadeIn {
      from {
        opacity: 0;
        transform: translateY(20px);
      }
      to {
        opacity: 1;
        transform: translateY(0);
      }
    }
    
    .container {
      animation: fadeIn 0.8s ease-out;
    }
    
    /* 加载屏幕样式 */
    .loading-screen {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: white;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      z-index: 9999;
      transition: opacity 0.5s ease, visibility 0.5s ease;
    }
    
    .loading-screen.fade-out {
      opacity: 0;
      visibility: hidden;
    }
    
    .loading-text {
      font-size: 64px;
      font-weight: 800;
      color: #000;
      margin-bottom: 40px;
      letter-spacing: 8px;
      display: flex;
      align-items: center;
      gap: 12px;
      position: relative;
    }
    
    .loading-text span {
      position: relative;
      background: linear-gradient(90deg, #000 0%, #000 40%, #fff 50%, #000 60%, #000 100%);
      background-size: 200% 100%;
      background-clip: text;
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      animation: shine 3s ease-in-out infinite;
    }
    
    @keyframes shine {
      0% {
        background-position: -200% 0;
      }
      50% {
        background-position: 200% 0;
      }
      100% {
        background-position: -200% 0;
      }
    }
    
    .loading-icon {
      width: 48px;
      height: 48px;
      animation: dropDown 0.8s ease-out 0.5s forwards, pulse 2s ease-in-out 1.3s infinite;
      transform: translateY(-60px) rotate(-15deg);
      opacity: 0;
    }
    
    @keyframes dropDown {
      0% {
        transform: translateY(-60px) rotate(-15deg);
        opacity: 0;
      }
      60% {
        transform: translateY(8px) rotate(5deg);
        opacity: 1;
      }
      80% {
        transform: translateY(-3px) rotate(-2deg);
      }
      100% {
        transform: translateY(0) rotate(0deg);
        opacity: 1;
      }
    }
    
    @keyframes pulse {
      0%, 100% {
        opacity: 1;
        transform: scale(1);
      }
      50% {
        opacity: 0.7;
        transform: scale(1.05);
      }
    }
    
    .progress-container {
      width: 300px;
      height: 6px;
      background: #f0f0f0;
      border-radius: 3px;
      overflow: hidden;
      box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.1);
    }
    
    .progress-bar {
      height: 100%;
      background: linear-gradient(90deg, #a8edea 0%, #fed6e3 100%);
      border-radius: 3px;
      width: 0%;
      transition: width 0.3s ease;
      box-shadow: 0 0 10px rgba(168, 237, 234, 0.5);
    }
    
    @media (max-width: 480px) {
      .loading-text {
        font-size: 42px;
        letter-spacing: 4px;
      }
      
      .loading-icon {
        width: 36px;
        height: 36px;
      }
      
      .progress-container {
        width: 250px;
      }
    }