body {
  margin: 0;
  padding: 0;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;

  /* 背景：天空蓝渐变 + 动态流动 */
  background: linear-gradient(270deg, #87cefa, #ffffff, #b0e0e6);
  background-size: 600% 600%;
  animation: bgMove 20s ease infinite;

  /* 文字颜色改为深蓝，增强对比度 */
  color: #1a2a3a;
  font-family:
    system-ui,
    Segoe UI,
    Roboto,
    Inter,
    "Noto Sans",
    sans-serif;
}

.card {
  max-width: 700px;
  text-align: center;
  padding: 2rem;
  border-radius: 14px;

  /* 卡片背景更亮，文字更清晰 */
  background: rgba(255, 255, 255, 0.85);
  border: 1px solid rgba(135, 206, 250, 0.6);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.35);
  animation: fadeIn 1.2s ease-in-out;
}

.title {
  font-size: 2.4rem;
  font-weight: 700;
  background: linear-gradient(90deg, #1a2a3a, #87cefa);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-bottom: 1rem;

  /* 平滑闪烁光晕 */
  animation: titleGlow 3s ease-in-out infinite;
}

.subtitle {
  font-size: 1.2rem;
  margin-bottom: 1rem;
  color: #1a2a3a;
}

.badge {
  display: inline-block;
  padding: 0.4rem 0.8rem;
  border: 1px dashed #1a2a3a;
  border-radius: 999px;
  margin-top: 1rem;
  color: #1a2a3a;
}

.footer {
  margin-top: 1rem;
  font-size: 0.9rem;
  color: #333;
}

.contact {
  margin-top: 1rem;
  font-size: 1rem;
  color: #1a2a3a;
}

.gw {
  color: #0066cc;
  margin-top: 1rem;
}

/* 动画效果 */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes bgMove {
  0% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
  100% {
    background-position: 0% 50%;
  }
}

@keyframes titleGlow {
  0%,
  100% {
    text-shadow:
      0 0 10px #87cefa,
      0 0 20px #1a2a3a;
  }
  50% {
    text-shadow:
      0 0 20px #1a2a3a,
      0 0 40px #87cefa;
  }
}