/* 引入Tailwind CSS */
@import url('https://cdn.jsdelivr.net/npm/tailwindcss@2.2.19/dist/tailwind.min.css');

/* 自定义工具类 */
@layer utilities {
  .text-shadow {
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  }
  
  .text-shadow-lg {
    text-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
  }
  
  .bg-gradient-primary {
    background: linear-gradient(135deg, #6e8efb, #a777e3);
  }
  
  .bg-gradient-secondary {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
  }
  
  .transition-all-300 {
    transition: all 300ms ease-in-out;
  }
}

/* 全局样式重置 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
}

/* 动态背景容器 */
.floating-lines-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  overflow: hidden;
}

/* 中央内容区域 */
.content-container {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
  z-index: 10;
  padding: 2rem;
  max-width: 90%;
}

.main-title {
  font-size: clamp(2.5rem, 8vw, 5rem);
  font-weight: 800;
  color: white;
  margin-bottom: 1rem;
  text-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
  letter-spacing: -0.02em;
}

.subtitle {
  font-size: clamp(1rem, 3vw, 1.5rem);
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 2.5rem;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* 按钮样式 */
.button-group {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
}

.btn {
  padding: 0.875rem 2rem;
  border-radius: 50px;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: all 0.3s ease;
  border: none;
  outline: none;
  position: relative;
  overflow: hidden;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  min-width: 140px;
  text-align: center;
}

.btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 7px 14px rgba(0, 0, 0, 0.2);
}

.btn:active {
  transform: translateY(-1px);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

.primary-btn {
  background: white; /* 修改为白色背景 */
  color: black; /* 文字颜色改为黑色以确保可读性 */
}

.secondary-btn {
  background: rgba(255, 255, 255, 0.2);
  color: white;
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.3);
}

/* 底部提示区域 */
.hint-container {
  position: absolute;
  bottom: 2rem;
  left: 0;
  width: 100%;
  text-align: center;
  z-index: 10;
}

.hint-text {
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.875rem;
  letter-spacing: 0.5px;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

/* 全屏模式样式 */
.fullscreen {
  cursor: none;
}

/* 响应式设计调整 */
@media (max-width: 768px) {
  .content-container {
    padding: 1.5rem;
  }
  
  .button-group {
    flex-direction: column;
    align-items: center;
  }
  
  .btn {
    width: 100%;
    max-width: 250px;
  }
  
  .hint-container {
    bottom: 1rem;
  }
}

/* 动画效果 */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translate(-50%, -45%);
  }
  to {
    opacity: 1;
    transform: translate(-50%, -50%);
  }
}

.content-container {
  animation: fadeIn 1s ease-out forwards;
}

/* 波纹效果 */
.ripple {
  position: absolute;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.3);
  transform: scale(0);
  animation: ripple-animation 0.8s ease-out;
  pointer-events: none;
}

@keyframes ripple-animation {
  to {
    transform: scale(4);
    opacity: 0;
  }
}