@charset "UTF-8";
/* 基础设置 - 确保无滚动条且全屏显示 */
 html, body {
   height: 100%;
   overflow: hidden; /* 禁止滚动 */
   margin: 0;
   padding: 0;
 }

 :root {
   --primary: #1677ff;
   --primary-light: #e8f3ff;
   --primary-dark: #0958d9;
   --text-primary: #333;
   --text-secondary: #666;
   --text-tertiary: #999;
   --border-color: #ddd;
   --bg-color: #f0f2f5;
   --white: #fff;
   --danger: #ff4d4f;
   --shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
 }

 * {
   box-sizing: border-box;
   font-family: 'Inter', 'system-ui', sans-serif;
 }

 body {
   background-color: var(--bg-color);
   display: flex;
   flex-direction: column;
   position: relative;
 }

 /* 装饰元素 - 不占用实际空间 */
 .decor {
   position: absolute;
   z-index: 0;
   opacity: 0.5;
 }

 .decor-1 {
   width: 300px;
   height: 300px;
   top: -150px;
   left: -100px;
   background: radial-gradient(circle, var(--primary) 0%, transparent 70%);
   border-radius: 50%;
 }

 .decor-2 {
   width: 250px;
   height: 250px;
   bottom: -125px;
   right: -80px;
   background: radial-gradient(circle, var(--primary) 0%, transparent 70%);
   border-radius: 50%;
 }

 /* 主容器 - 自适应高度 */
 .login-container {
   flex: 1;
   display: flex;
   flex-direction: column;
   align-items: center;
   justify-content: center;
   padding: 50px;
   position: relative;
   z-index: 1;
   width: 100%;
   max-width: 500px; /* 限制最大宽度 */
   margin: 0 auto; /* 水平居中 */
 }

 /* 品牌标识 - 紧凑布局 */
 .brand {
   text-align: center;
   margin-bottom: 30px;
   padding: 0 10px;
 }

 .brand-logo {
   display: inline-flex;
   align-items: center;
   gap: 10px;
   margin-bottom: 12px;
 }

 .brand-logo i {
   font-size: 32px;
   color: var(--primary);
 }

 .brand-logo h1 {
   font-size: 22px;
   color: var(--text-primary);
   font-weight: 600;
   margin: 0;
 }

 .brand-desc {
   color: var(--text-secondary);
   font-size: 14px;
   line-height: 1.5;
   margin: 0;
 }

 /* 登录卡片 - 固定最大高度 */
 .login-card {
   width: 100%;
   background-color: var(--white);
   border-radius: 12px;
   box-shadow: var(--shadow);
   padding: 25px;
   transition: transform 0.3s ease;
   max-height: calc(100vh - 200px); /* 限制卡片最大高度 */
   overflow-y: auto; /* 极端情况内容过多时内部滚动 */
 }

 .login-card:hover {
   transform: translateY(-3px);
 }

 .card-header {
   margin-bottom: 20px;
 }

 .card-header h2 {
   font-size: 20px;
   color: var(--text-primary);
   margin: 0 0 5px 0;
 }

 .card-header p {
   color: var(--text-tertiary);
   font-size: 13px;
   margin: 0;
 }

 /* 表单样式 - 紧凑间距 */
 .form-group {
   margin-bottom: 18px;
 }

 .form-group label {
   display: block;
   margin-bottom: 6px;
   font-size: 14px;
   color: var(--text-secondary);
   font-weight: 500;
 }

 .form-control {
   width: 100%;
   padding: 12px 15px;
   border: 1px solid var(--border-color);
   border-radius: 8px;
   font-size: 14px;
   transition: all 0.2s ease;
   background-color: var(--white);
 }

 .form-control::placeholder {
   color: var(--text-tertiary);
 }

 .form-control:focus {
   outline: none;
   border-color: var(--primary);
   box-shadow: 0 0 0 4px var(--primary-light);
 }

 .input-group {
   position: relative;
 }

 .input-group .form-control {
   padding-right: 40px;
 }

 .input-group .toggle-btn {
   position: absolute;
   right: 12px;
   top: 50%;
   transform: translateY(-50%);
   color: var(--text-tertiary);
   cursor: pointer;
   font-size: 15px;
   transition: color 0.2s;
 }

 .input-group .toggle-btn:hover {
   color: var(--primary);
 }

 .captcha-row {
   display: flex;
   gap: 10px;
 }

 .captcha-input {
   flex: 1;
 }

 .captcha-img {
   width: 100px;
   height: 44px;
   background-color: var(--bg-color);
   border-radius: 8px;
   display: flex;
   align-items: center;
   justify-content: center;
   font-size: 18px;
   letter-spacing: 3px;
   font-weight: 600;
   color: var(--text-primary);
   cursor: pointer;
   user-select: none;
   border: 1px solid var(--border-color);
   transition: all 0.2s;
 }

 .captcha-img:hover {
   border-color: var(--primary);
   background-color: var(--primary-light);
 }

 .form-actions {
   display: flex;
   justify-content: space-between;
   align-items: center;
   margin: 5px 0 20px;
   font-size: 13px;
 }

 .remember-option {
   display: flex;
   align-items: center;
   gap: 5px;
   color: var(--text-secondary);
   cursor: pointer;
 }

 .remember-option input {
   width: 15px;
   height: 15px;
   accent-color: var(--primary);
 }

 .forgot-link {
   color: var(--primary);
   text-decoration: none;
   transition: all 0.2s;
 }

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

 /* 按钮样式 */
 .btn {
   width: 100%;
   padding: 12px 0;
   border-radius: 8px;
   font-size: 15px;
   font-weight: 500;
   border: none;
   cursor: pointer;
   transition: all 0.2s ease;
   display: flex;
   align-items: center;
   justify-content: center;
 }

 .btn-primary {
   background-color: var(--primary);
   color: white;
 }

 .btn-primary:hover {
   background-color: var(--primary-dark);
   box-shadow: 0 4px 12px rgba(22, 119, 255, 0.3);
 }

 /* 错误提示 */
 .error-feedback {
   color: var(--danger);
   font-size: 12px;
   margin-top: 4px;
   height: 16px;
   display: none;
 }

 .error-feedback.show {
   display: block;
 }

 /* 页脚 - 固定在底部 */
 .page-footer {
   padding: 15px;
   text-align: center;
   font-size: 12px;
   color: var(--text-tertiary);
   position: relative;
   z-index: 1;
   margin-top: auto;
 }

 .footer-links {
   margin-top: 5px;
 }

 .footer-links a {
   color: var(--text-tertiary);
   text-decoration: none;
   margin: 0 6px;
   transition: color 0.2s;
 }

 .footer-links a:hover {
   color: var(--primary);
 }

 /* 加载动画 */
 .loading-spinner {
   width: 18px;
   height: 18px;
   border: 2px solid rgba(255, 255, 255, 0.3);
   border-radius: 50%;
   border-top-color: white;
   animation: spin 1s linear infinite;
   margin-right: 6px;
 }

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

 /* 响应式调整 - 确保不同屏幕都无滚动条 */
 @media (max-height: 600px) {
   .brand {
     margin-bottom: 20px;
   }
   .brand-desc {
     display: none; /* 小屏幕隐藏描述文字 */
   }
   .login-card {
     padding: 20px;
     max-height: calc(100vh - 150px);
   }
   .form-group {
     margin-bottom: 15px;
   }
   .page-footer {
     padding: 10px;
   }
 }

 @media (max-width: 400px) {
   .captcha-row {
     flex-direction: column;
   }
   .captcha-img {
     width: 100%;
     height: 44px;
   }
 }