/* 基础样式 */
:root {
  --primary-color: #1890FF;
  --secondary-color: #722ED1;
  --text-color: #333;
  --text-light: #666;
  --border-color: #e0e0e0;
  --bg-color: #fff;
  --error-color: #ff4d4f;
  --success-color: #52c41a;
  --radius: 8px;
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  --transition: all 0.3s ease;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
  color: var(--text-color);
  background-color: var(--bg-color);
  line-height: 1.5;
}

/* 登录容器 */
.login-container {
  display: flex;
  min-height: calc(100vh - 120px);
  padding: 40px 5%;
  align-items: center;
  justify-content: center;
  gap: 10%;
  margin: 0 auto;
  max-width: 1200px;
}

.login-card {
  flex: 0 1 480px;
  max-width: 480px;
  padding: 40px;
  background: var(--bg-color);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  transition: var(--transition);
  margin: 0 auto;
}

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

.login-header h1 {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 8px;
  background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

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

/* 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);
}

.form-group input {
  padding: 12px 16px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  font-size: 16px;
  transition: var(--transition);
}

.form-group input:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 2px rgba(24, 144, 255, 0.2);
}

.forgot-password {
  font-size: 14px;
  color: var(--primary-color);
  text-decoration: none;
  align-self: flex-end;
  transition: var(--transition);
}

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

.login-btn {
  padding: 12px;
  background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
  color: white;
  border: none;
  border-radius: var(--radius);
  font-size: 16px;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
}

.login-btn:hover {
  opacity: 0.9;
  transform: translateY(-2px);
}

/* 分割线 */
.divider {
  display: flex;
  align-items: center;
  margin: 24px 0;
  color: var(--text-light);
  font-size: 14px;
}

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

.divider span {
  padding: 0 12px;
}

/* 社交登录 */
.social-login {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 24px;
}

.social-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  background: var(--bg-color);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
}

.social-btn:hover {
  border-color: var(--primary-color);
  color: var(--primary-color);
}

.social-btn.google i {
  color: #DB4437;
}

.social-btn.facebook i {
  color: #4267B2;
}

/* 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 {
  color: var(--secondary-color);
  text-decoration: underline;
}

/* 插图 */
.login-illustration {
  flex: 0 1 600px;
  max-width: 600px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-left: auto;
}

.feature-list {
  list-style: none;
  padding: 20px;
  width: 100%;
}

.feature-list li {
  padding: 12px 0;
  font-size: 16px;
  color: var(--text-color);
  border-bottom: 1px solid var(--border-color);
}

.feature-list li:last-child {
  border-bottom: none;
}

/* 响应式设计 */
@media (max-width: 992px) {
  .login-container {
    flex-direction: column;
    padding: 40px 20px;
  }
  
  .login-card {
    width: 100%;
    max-width: 500px;
  }
  
  .login-illustration {
    display: none;
  }
}

@media (max-width: 576px) {
  .login-card {
    padding: 32px 24px;
  }
  
  .login-header h1 {
    font-size: 22px;
  }
}