/* 基础样式 */
:root {
  --primary-color: #1E90FF;
  --primary-light: #E6F2FF;
  --secondary-color: #FFA500;
  --secondary-light: #FFF0D9;
  --text-color: #333;
  --text-light: #666;
  --text-lighter: #999;
  --border-color: #E0E0E0;
  --bg-color: #F8FAFC;
  --white: #FFFFFF;
  --error-color: #FF4D4F;
  --success-color: #52C41A;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --transition: all 0.3s ease;
}

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

body {
  font-family: 'Roboto', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  color: var(--text-color);
  background-color: var(--bg-color);
  line-height: 1.5;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* 登录容器 */
.login-container {
  display: flex;
  justify-content: center;
  align-items: center;
  flex: 1;
  padding: 2rem;
  background: linear-gradient(135deg, var(--primary-light) 0%, var(--white) 100%);
}

.login-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: 2.5rem;
  width: 100%;
  max-width: 420px;
  transition: var(--transition);
}

.login-title {
  font-size: 1.75rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--text-color);
  text-align: center;
}

.login-subtitle {
  font-size: 0.9375rem;
  color: var(--text-light);
  text-align: center;
  margin-bottom: 2rem;
}

/* 表单样式 */
.login-form {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-group label {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-color);
}

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

.input-icon {
  position: absolute;
  left: 1rem;
  color: var(--text-lighter);
  font-size: 1rem;
}

input {
  width: 100%;
  padding: 0.75rem 1rem 0.75rem 2.5rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: 0.9375rem;
  transition: var(--transition);
  background-color: var(--white);
}

input:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 2px rgba(30, 144, 255, 0.2);
}

.toggle-password {
  position: absolute;
  right: 1rem;
  background: none;
  border: none;
  color: var(--text-lighter);
  cursor: pointer;
  font-size: 1rem;
  padding: 0.25rem;
  transition: var(--transition);
}

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

.form-options {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8125rem;
}

.remember-me {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-light);
  cursor: pointer;
}

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

.forgot-password:hover {
  text-decoration: underline;
}

.login-button {
  background-color: var(--primary-color);
  color: var(--white);
  border: none;
  border-radius: var(--radius-md);
  padding: 0.875rem;
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  margin-top: 0.5rem;
}

.login-button:hover {
  background-color: #1a7fd9;
  box-shadow: 0 2px 8px rgba(30, 144, 255, 0.3);
}

/* 分割线 */
.divider {
  display: flex;
  align-items: center;
  margin: 1.5rem 0;
  color: var(--text-lighter);
  font-size: 0.8125rem;
}

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

.divider span {
  padding: 0 1rem;
}

/* 社交登录 */
.social-login {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.social-button {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  background-color: var(--white);
  font-size: 0.9375rem;
  cursor: pointer;
  transition: var(--transition);
}

.social-button:hover {
  background-color: #f5f5f5;
}

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

.social-button.wechat:hover {
  border-color: #07C160;
  background-color: rgba(7, 193, 96, 0.05);
}

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

.social-button.qq:hover {
  border-color: #12B7F5;
  background-color: rgba(18, 183, 245, 0.05);
}

/* 注册链接 */
.register-link {
  text-align: center;
  font-size: 0.9375rem;
  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;
}

/* 响应式设计 */
@media (max-width: 480px) {
  .login-card {
    padding: 1.5rem;
  }
  
  .login-title {
    font-size: 1.5rem;
  }
  
  .social-login {
    flex-direction: column;
  }
}