/* 
  3D 星际射击战机 - 全局科幻样式
  使用 CSS 变量定义霓虹科技风格，支持流畅的微动效
*/

:root {
  --color-bg: #0a0a16;
  --color-bg-dark: #05050b;
  --color-primary: #00f0ff;      /* 霓虹蓝 */
  --color-secondary: #bd00ff;    /* 极光紫 */
  --color-accent: #ff0055;       /* 警报红 */
  --color-text: #e0e0f0;
  --color-text-muted: #8a8a9e;
  --color-card-bg: rgba(16, 16, 36, 0.7);
  --color-card-border: rgba(0, 240, 255, 0.2);
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --glow-primary: 0 0 10px rgba(0, 240, 255, 0.5);
  --glow-secondary: 0 0 10px rgba(189, 0, 255, 0.5);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background: radial-gradient(circle at center, var(--color-bg) 0%, var(--color-bg-dark) 100%);
  color: var(--color-text);
  font-family: var(--font-family);
  min-height: 100vh;
  overflow-x: hidden;
  line-height: 1.6;
}

/* 霓虹发光标题 */
.glow-text {
  color: #fff;
  text-shadow: var(--glow-primary);
}

.gradient-title {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-shadow: none;
}

/* 科幻卡片 */
.sci-fi-card {
  background: var(--color-card-bg);
  border: 1px solid var(--color-card-border);
  border-radius: 12px;
  padding: 24px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: transform 0.3s cubic-bezier(0.25, 0.8, 0.25, 1), border-color 0.3s, box-shadow 0.3s;
}

.sci-fi-card:hover {
  transform: translateY(-5px);
  border-color: var(--color-primary);
  box-shadow: 0 12px 40px rgba(0, 240, 255, 0.15);
}

/* 科幻按钮 */
.sci-fi-btn {
  background: rgba(0, 240, 255, 0.1);
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
  border-radius: 6px;
  padding: 10px 24px;
  font-family: var(--font-family);
  font-size: 1rem;
  font-weight: bold;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: all 0.2s ease;
  text-shadow: var(--glow-primary);
  box-shadow: inset 0 0 8px rgba(0, 240, 255, 0.1);
}

.sci-fi-btn:hover {
  background: var(--color-primary);
  color: var(--color-bg-dark);
  box-shadow: var(--glow-primary);
  transform: scale(1.05);
  text-shadow: none;
}

.sci-fi-btn:active {
  transform: scale(0.98);
}

.sci-fi-btn.secondary {
  color: var(--color-secondary);
  border-color: var(--color-secondary);
  background: rgba(189, 0, 255, 0.1);
  text-shadow: var(--glow-secondary);
  box-shadow: inset 0 0 8px rgba(189, 0, 255, 0.1);
}

.sci-fi-btn.secondary:hover {
  background: var(--color-secondary);
  color: var(--color-bg-dark);
  box-shadow: var(--glow-secondary);
  text-shadow: none;
}

/* 顶部导航栏 */
.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 40px;
  background: rgba(5, 5, 11, 0.8);
  border-bottom: 1px solid rgba(0, 240, 255, 0.1);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-logo {
  font-size: 1.5rem;
  font-weight: 800;
  text-decoration: none;
  letter-spacing: 2px;
}

.nav-links {
  display: flex;
  gap: 20px;
}

/* 页面容器 */
.container {
  max-width: 1200px;
  margin: 40px auto;
  padding: 0 20px;
}

/* 底部页脚 */
footer {
  text-align: center;
  padding: 40px 20px;
  color: var(--color-text-muted);
  font-size: 0.9rem;
  border-top: 1px solid rgba(0, 240, 255, 0.05);
  margin-top: 80px;
}

/* 响应式调整 */
@media (max-width: 768px) {
  .navbar {
    flex-direction: column;
    gap: 15px;
    padding: 15px 20px;
  }
  .nav-links {
    width: 100%;
    justify-content: center;
    flex-wrap: wrap;
  }
}

/* 滚动条样式 */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: var(--color-bg-dark);
}
::-webkit-scrollbar-thumb {
  background: rgba(0, 240, 255, 0.3);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--color-primary);
}