.theme-picker {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.9);
  padding: 15px;
  border-radius: 8px;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
  display: none;
}
.theme-toggle {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 1001;
  width: 40px;
  height: 40px;
  background: rgba(255, 255, 255, 0.9);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
  transition: all 0.3s ease;
}
.theme-toggle:hover {
  transform: rotate(30deg);
}
.theme-toggle i {
  font-size: 20px;
  color: #666;
}
.color-item {
  display: flex;
  align-items: center;
  margin-bottom: 10px;
}
.color-item:last-child {
  margin-bottom: 0;
}
.color-label {
  width: 80px;
  color: #666;
  font-size: 12px;
}
.color-input {
  width: 80px;
  height: 30px;
  padding: 0 5px;
  border: 1px solid #ddd;
  border-radius: 4px;
}
.theme-actions {
  margin-top: 15px;
  display: flex;
  justify-content: flex-end;
  border-top: 1px solid #eee;
  padding-top: 15px;
}
.theme-actions .layui-btn {
  height: 32px;
  line-height: 32px;
  padding: 0 15px;
  font-size: 12px;
}
.theme-actions .layui-btn + .layui-btn {
  margin-left: 8px;
}
body {
  background-color: #f5f5f5;
  overflow: hidden;
}
.login-wrapper {
  width: 100vw;
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}
.login-container {
  width: 400px;
  padding: 40px;
  background: rgba(255, 255, 255, 0.9);
  border-radius: 10px;
  box-shadow: 0 0 20px rgba(0, 0, 0, 0.1);
}
.login-title {
  text-align: center;
  margin-bottom: 30px;
  color: #333;
}
.login-title h2 {
  font-size: 26px;
  font-weight: 500;
  margin-bottom: 5px;
}
.layui-form-item {
  margin-bottom: 25px;
  position: relative;
}
.login-icon {
  position: absolute;
  left: 10px;
  top: 50%;
  transform: translateY(-50%);
  color: #999;
  z-index: 1;
}
.layui-input {
  padding-left: 35px !important;
  height: 40px;
  line-height: 40px;
  background-color: rgba(255, 255, 255, 0.9) !important;
}
.captcha-item {
  display: flex;
  align-items: center;
}
.captcha-input {
  flex: 1;
  margin-right: 10px;
}
.captcha-img {
  height: 40px;
  border-radius: 4px;
  cursor: pointer;
}
.login-btn {
  height: 45px;
  line-height: 45px;
  font-size: 16px;
}
.login-btn:hover {
  opacity: 0.9;
}
.animated-bg {
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  z-index: -1;
  background-size: 400% 400%;
  animation: gradientBG 15s ease infinite;
}
.footer-info {
  position: absolute;
  bottom: 20px;
  left: 0;
  right: 0;
  text-align: center;
  color: rgba(255, 255, 255, 0.8);
  font-size: 12px;
  line-height: 1.8;
}
.footer-info a {
  color: rgba(255, 255, 255, 0.9);
  text-decoration: none;
}
.footer-info a:hover {
  color: #fff;
  text-decoration: underline;
}
.footer-info .divider {
  margin: 0 8px;
  color: rgba(255, 255, 255, 0.6);
}
/* 星光效果 */
.stars {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  pointer-events: none;
}
.star {
  position: absolute;
  width: 2px;
  height: 2px;
  background: rgba(255, 255, 255, 0.5);
  border-radius: 50%;
  animation: twinkle var(--duration) ease-in-out infinite;
  animation-delay: var(--delay);
}
@keyframes twinkle {
  0%, 100% {
      opacity: 0;
      transform: scale(0.5);
  }
  50% {
      opacity: 1;
      transform: scale(1);
  }
}
@keyframes gradientBG {
  0% {
      background-position: 0% 50%;
  }
  50% {
      background-position: 100% 50%;
  }
  100% {
      background-position: 0% 50%;
  }
}