/* 全局样式 */
:root {
  --primary-color: #4A90E2;
  --primary-light: #E6F2FF;
  --primary-dark: #2D6DB5;
  --text-color: #333333;
  --text-light: #666666;
  --text-lighter: #999999;
  --border-color: #E0E0E0;
  --bg-color: #FFFFFF;
  --bg-light: #F8F9FA;
  --error-color: #E74C3C;
  --success-color: #2ECC71;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
  --transition: all 0.3s ease;
}

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

body {
  font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
  color: var(--text-color);
  background-color: var(--bg-light);
  line-height: 1.6;
}

/* 登录容器 */
.login-container {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: calc(100vh - 120px);
  padding: 40px 20px;
  gap: 60px;
}

.login-card {
  background-color: var(--bg-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: 40px;
  width: 100%;
  max-width: 420px;
  transition: var(--transition);
}

.login-header {
  margin-bottom: 32px;
  text-align: center;
}

.login-header h1 {
  font-size: 24px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-color);
}

.login-header p {
  font-size: 16px;
  color: var(--text-light);
}

/* 表单样式 */
.login-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-group label {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-color);
}

.input-with-icon {
  position: relative;
  display: flex;
  align-items: center;
}

.input-with-icon i {
  position: absolute;
  left: 12px;
  color: var(--text-lighter);
  font-size: 18px;
}

.input-with-icon input {
  width: 100%;
  padding: 12px 16px 12px 40px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: 16px;
  transition: var(--transition);
  background-color: var(--bg-light);
}

.input-with-icon input:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 2px var(--primary-light);
}

.toggle-password {
  position: absolute;
  right: 12px;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-lighter);
  font-size: 18px;
  padding: 0;
}

.toggle-password:hover {
  color: var(--text-light);
}

/* 表单选项 */
.form-options {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 14px;
}

.remember-me {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-light);
  cursor: pointer;
}

.remember-me input {
  width: 16px;
  height: 16px;
  accent-color: var(--primary-color);
}

.forgot-password {
  color: var(--primary-color);
  text-decoration: none;
  transition: var(--transition);
}

.forgot-password:hover {
  text-decoration: underline;
  color: var(--primary-dark);
}

/* 登录按钮 */
.login-button {
  background-color: var(--primary-color);
  color: white;
  border: none;
  border-radius: var(--radius-md);
  padding: 12px;
  font-size: 16px;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  margin-top: 8px;
}

.login-button:hover {
  background-color: var(--primary-dark);
}

.login-button:active {
  transform: translateY(1px);
}

/* 分割线 */
.divider {
  display: flex;
  align-items: center;
  margin: 16px 0;
  color: var(--text-lighter);
  font-size: 14px;
}

.divider::before,
.divider::after {
  content: "";
  flex: 1;
  border-bottom: 1px solid var(--border-color);
}

.divider::before {
  margin-right: 16px;
}

.divider::after {
  margin-left: 16px;
}

/* 社交登录 */
.social-login {
  display: flex;
  gap: 12px;
  margin-bottom: 16px;
}

.social-button {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  background-color: var(--bg-color);
  font-size: 14px;
  cursor: pointer;
  transition: var(--transition);
}

.social-button:hover {
  background-color: var(--bg-light);
}

.social-button i {
  font-size: 18px;
}

.social-button.wechat {
  color: #07C160;
}

.social-button.qq {
  color: #12B7F5;
}

/* 注册链接 */
.register-link {
  text-align: center;
  font-size: 14px;
  color: var(--text-light);
}

.register-link a {
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 500;
  transition: var(--transition);
}

.register-link a:hover {
  text-decoration: underline;
  color: var(--primary-dark);
}

/* 插图 */
.login-illustration {
  display: none;
}

/* 响应式设计 */
@media (min-width: 992px) {
  .login-illustration {
    display: block;
    max-width: 500px;
  }
  
  .login-illustration img {
    width: 100%;
    height: auto;
    border-radius: var(--radius-lg);
  }
}

/* 错误状态 */
.error-message {
  color: var(--error-color);
  font-size: 14px;
  margin-top: 4px;
  display: none;
}

.input-error {
  border-color: var(--error-color) !important;
}

.input-error:focus {
  box-shadow: 0 0 0 2px rgba(231, 76, 60, 0.2) !important;
}

/* 加载状态 */
.loading {
  position: relative;
  pointer-events: none;
  opacity: 0.8;
}

.loading::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 20px;
  height: 20px;
  margin: -10px 0 0 -10px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  border-top-color: white;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}