@import url(reset.css);
.yemei {
  background-color: rgba(248, 8, 8, 0.853);
  height: 3rem;

  position: fixed; /* 固定定位 */
  left: 0;
  top: 0;
  right: 0;
  z-index: 100; /* 页眉始终显示在前面 */
  display: flex;
  flex-flow: row nowrap;
  align-items: center;
}
.yemei p {
  flex: 1;
  color: aqua;
  text-align: center;
  font-size: 1.5rem;
}
.yemei a {
  font-size: 1.3rem;
  text-align: center;
  color: white;
}
.yemei h2 {
  color: white;
}

body {
  margin: 0;
  padding: 0;
  font-family: Arial, sans-serif;
  background: linear-gradient(135deg, #0f0c29 0%, #302b63 50%, #24243e 100%);
  color: #fff;
  overflow-x: hidden;
  position: relative;
}

/* 宇宙背景效果 */
.space-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
}

.particle {
  position: absolute;
  background-color: rgba(255, 255, 255, 0.8);
  border-radius: 50%;
  animation: float 8s infinite ease-in-out;
}

@keyframes float {
  0%,
  100% {
    transform: translateY(0) translateX(0);
    opacity: 0.8;
  }
  50% {
    transform: translateY(-20px) translateX(10px);
    opacity: 0.4;
  }
}

/* 页眉样式 */
.yemei2 {
  text-align: center;
  padding: 30px 0;
  background: radial-gradient(
    circle,
    rgba(148, 187, 233, 0.3) 0%,
    rgba(58, 107, 164, 0.1) 70%
  );
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  position: relative;
  overflow: hidden;
  animation: pulse 4s infinite;
}

@keyframes pulse {
  0%,
  100% {
    box-shadow: 0 0 20px rgba(148, 187, 233, 0.5);
  }
  50% {
    box-shadow: 0 0 40px rgba(148, 187, 233, 0.8);
  }
}

.beianhao {
  height: 3rem;
  position: fixed;
  left: 0;
  bottom: 2rem;
  right: 0;
  display: flex;
  flex-flow: row nowrap;
  align-items: center;
}
.beianhao .ba {
  flex: 1;
  text-align: center;
}

.yejiao {
  background-color: rgba(112, 114, 113, 0.894);
  height: 3rem;
  position: fixed;
  left: 0;
  bottom: 0;
  right: 0;
  display: flex;
  flex-flow: row nowrap;
  align-items: center;
}
.yejiao .aa,
.yejiao .bb,
.yejiao .cc {
  color: white;
  flex: 1;
  text-align: center;
  font-size: 1.2rem;
}