/* 全局样式重置 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Microsoft YaHei', 'PingFang SC', 'Helvetica Neue', Arial, sans-serif;
}

body {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  background: linear-gradient(135deg, #6e8efb, #a777e3);
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
  overflow: hidden;
  position: relative;
}

/* 背景图形 */
.bg-shapes {
  position: absolute;
  width: 100%;
  height: 100%;
  overflow: hidden;
  z-index: -1;
}

.bg-shapes div {
  position: absolute;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
}

.bg-shapes div:nth-child(1) {
  width: 80px;
  height: 80px;
  top: 10%;
  left: 10%;
  animation: float 8s infinite;
}

.bg-shapes div:nth-child(2) {
  width: 120px;
  height: 120px;
  top: 60%;
  left: 15%;
  animation: float 10s infinite;
}

.bg-shapes div:nth-child(3) {
  width: 60px;
  height: 60px;
  top: 30%;
  left: 80%;
  animation: float 7s infinite;
}

.bg-shapes div:nth-child(4) {
  width: 100px;
  height: 100px;
  top: 70%;
  left: 75%;
  animation: float 11s infinite;
}

.bg-shapes div:nth-child(5) {
  width: 70px;
  height: 70px;
  top: 20%;
  left: 50%;
  animation: float 9s infinite;
}

@keyframes float {

  0%,
  100% {
    transform: translateY(0) translateX(0);
  }

  25% {
    transform: translateY(-15px) translateX(10px);
  }

  50% {
    transform: translateY(8px) translateX(-10px);
  }

  75% {
    transform: translateY(-5px) translateX(15px);
  }
}

/* 登录容器 */
.login-container {
  position: relative;
  width: 380px;
  padding: 40px;
  background: rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: 16px;
  box-shadow: 0 8px 32px rgba(31, 38, 135, 0.2);
  border: 1px solid rgba(255, 255, 255, 0.18);
  transition: transform 0.3s, box-shadow 0.3s;
}

.login-container:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 35px rgba(31, 38, 135, 0.25);
}

/* 登录标题 */
.login-title {
  margin-bottom: 30px;
  text-align: center;
  color: #fff;
  font-size: 28px;
  font-weight: 600;
  letter-spacing: 1px;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

/* 表单样式 */
.login-form .form-group {
  position: relative;
  margin-bottom: 25px;
}

.login-form label {
  position: absolute;
  top: 0;
  left: 0;
  padding: 15px 0;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.8);
  pointer-events: none;
  transition: 0.3s;
}

.login-form input[type="text"],
.login-form input[type="password"] {
  width: 100%;
  padding: 15px 0;
  font-size: 16px;
  color: #fff;
  background: transparent;
  border: none;
  border-bottom: 1px solid rgba(255, 255, 255, 0.5);
  outline: none;
  transition: 0.3s;
}

.login-form input[type="text"]:focus,
.login-form input[type="text"]:valid,
.login-form input[type="password"]:focus,
.login-form input[type="password"]:valid {
  border-bottom: 2px solid #fff;
}

.login-form input[type="text"]:focus~label,
.login-form input[type="text"]:valid~label,
.login-form input[type="password"]:focus~label,
.login-form input[type="password"]:valid~label {
  top: -20px;
  left: 0;
  color: #fff;
  font-size: 12px;
  font-weight: 600;
}

/* 登录按钮 */
.login-btn {
  position: relative;
  width: 100%;
  padding: 12px 0;
  margin-top: 20px;
  background: rgba(255, 255, 255, 0.25);
  border: none;
  border-radius: 8px;
  color: #fff;
  font-size: 16px;
  font-weight: 600;
  letter-spacing: 1px;
  cursor: pointer;
  overflow: hidden;
  transition: 0.3s;
}

.login-btn:before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: 0.5s;
}

.login-btn:hover {
  background: rgba(255, 255, 255, 0.35);
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.login-btn:hover:before {
  left: 100%;
}

/* 错误消息 */
.error-message {
  margin-top: 20px;
  padding: 12px;
  background: rgba(255, 0, 0, 0.15);
  color: #fff;
  border-radius: 6px;
  font-size: 14px;
  text-align: center;
  display: none;
}

.error-message.show {
  display: block;
  animation: fadeIn 0.3s;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* 验证码样式 */
.captcha-group {
  margin-bottom: 20px;
}

.captcha-container {
  display: flex;
  gap: 10px;
  align-items: center;
}

.captcha-container input {
  flex: 1;
  width: auto !important;
  min-width: 120px;
}

.captcha-image {
  position: relative;
  display: flex;
  align-items: center;
  background: rgba(255, 255, 255, 0.9);
  border-radius: 6px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.3);
}

.captcha-image img {
  display: block;
  width: 120px;
  height: 40px;
  cursor: pointer;
}

.refresh-captcha {
  position: absolute;
  top: 2px;
  right: 2px;
  width: 24px;
  height: 24px;
  background: rgba(0, 0, 0, 0.6);
  border: none;
  border-radius: 4px;
  color: white;
  font-size: 10px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
  opacity: 0.8;
}

.refresh-captcha:hover {
  background: rgba(0, 0, 0, 0.8);
  opacity: 1;
  transform: scale(1.1);
}

.refresh-captcha i {
  transition: transform 0.3s ease;
}

.refresh-captcha:hover i {
  transform: rotate(180deg);
}

.captcha-hint {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.6);
  margin-top: 5px;
  text-align: center;
}

/* 记住我选项 */
.remember-me {
  display: flex;
  align-items: center;
  margin-top: 15px;
  margin-bottom: 10px;
  color: rgba(255, 255, 255, 0.8);
  font-size: 14px;
  cursor: pointer;
  user-select: none;
}

.remember-me input[type="checkbox"] {
  position: relative;
  width: 18px;
  height: 18px;
  margin-right: 10px;
  appearance: none;
  -webkit-appearance: none;
  background: rgba(255, 255, 255, 0.1);
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.3s ease;
  flex-shrink: 0;
}

.remember-me input[type="checkbox"]:hover {
  border-color: rgba(255, 255, 255, 0.6);
  background: rgba(255, 255, 255, 0.15);
}

.remember-me input[type="checkbox"]:checked {
  background: rgba(255, 255, 255, 0.9);
  border-color: rgba(255, 255, 255, 0.9);
}

.remember-me input[type="checkbox"]:checked::after {
  content: '✓';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  color: #6e8efb;
  font-size: 12px;
  font-weight: bold;
}

.remember-me label {
  position: static;
  padding: 0;
  color: rgba(255, 255, 255, 0.8);
  font-size: 14px;
  cursor: pointer;
  transition: color 0.3s ease;
  pointer-events: auto;
}

.remember-me:hover label {
  color: rgba(255, 255, 255, 1);
}

/* 响应式设计 */
@media (max-width: 480px) {
  .login-container {
    width: 90%;
    padding: 30px;
  }

  .login-title {
    font-size: 24px;
    margin-bottom: 25px;
  }

  .remember-me {
    margin-top: 12px;
    margin-bottom: 8px;
  }

  .remember-me input[type="checkbox"] {
    width: 16px;
    height: 16px;
    margin-right: 8px;
  }

  .remember-me input[type="checkbox"]:checked::after {
    font-size: 10px;
  }

  .remember-me label {
    font-size: 13px;
  }

  .login-btn {
    margin-top: 15px;
  }

  .captcha-container {
    flex-direction: column;
    gap: 8px;
  }

  .captcha-container input {
    min-width: auto;
    width: 100%;
  }

  .captcha-image {
    align-self: center;
  }

  .captcha-hint {
    font-size: 11px;
  }
}