/* 基础样式 */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Helvetica Neue', Arial, sans-serif;
        }
        
        body {
            background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
            height: 100vh;
            display: flex;
            justify-content: center;
            align-items: center;
            color: #333;
        }
        
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
            display: flex;
            justify-content: center;
            align-items: center;
            flex-wrap: wrap;
        }
        
        /* 登录卡片样式 */
        .login-container {
            width: 100%;
            max-width: 400px;
            background: white;
            border-radius: 10px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
            overflow: hidden;
            display: flex;
            flex-direction: column;
            animation: fadeInUp 0.6s ease-out;
        }
        
        .login-header {
            padding: 30px;
            text-align: center;
            border-bottom: 1px solid #f0f0f0;
        }
        
        .login-header h1 {
            font-size: 24px;
            color: #3a86ff;
            margin-bottom: 10px;
            font-weight: 600;
        }
        
        .login-header p {
            color: #888;
            font-size: 14px;
        }
        
        .login-body {
            padding: 30px;
        }
        
        .form-group {
            margin-bottom: 20px;
            position: relative;
        }
        
        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-size: 14px;
            color: #555;
            font-weight: 500;
        }
        
        .form-group input {
            width: 100%;
            padding: 12px 15px;
            border: 1px solid #ddd;
            border-radius: 6px;
            font-size: 14px;
            transition: all 0.3s;
            outline: none;
        }
        
        .form-group input:focus {
            border-color: #3a86ff;
            box-shadow: 0 0 0 2px rgba(58, 134, 255, 0.2);
        }
        
        .form-group .icon {
            position: absolute;
            right: 15px;
            top: 40px;
            color: #aaa;
        }
        
        .login-options {
            display: flex;
            justify-content: space-between;
            margin-bottom: 20px;
            font-size: 13px;
        }
        
        .login-options a {
            color: #3a86ff;
            text-decoration: none;
            transition: color 0.3s;
        }
        
        .login-options a:hover {
            color: #2667cc;
            text-decoration: underline;
        }
        
        .remember-me {
            display: flex;
            align-items: center;
        }
        
        .remember-me input {
            margin-right: 8px;
        }
        
        .login-button {
            width: 100%;
            padding: 12px;
            background: #3a86ff;
            color: white;
            border: none;
            border-radius: 6px;
            font-size: 16px;
            font-weight: 500;
            cursor: pointer;
            transition: all 0.3s;
            margin-top: 10px;
        }
        
        .login-button:hover {
            background: #2667cc;
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(58, 134, 255, 0.3);
        }
        
        .login-button:active {
            transform: translateY(0);
        }
        
        .login-footer {
            padding: 20px 30px;
            text-align: center;
            border-top: 1px solid #f0f0f0;
            font-size: 13px;
            color: #888;
        }
        
        .login-footer p {
            margin-bottom: 10px;
        }
        
        .login-footer p span {
            color: #3a86ff;
            cursor: pointer;
        }
        
        .login-footer p span:hover {
            text-decoration: underline;
        }
        
        .social-login {
            display: flex;
            justify-content: center;
            margin-top: 15px;
        }
        
        .social-login .social-btn {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            display: flex;
            justify-content: center;
            align-items: center;
            margin: 0 10px;
            cursor: pointer;
            transition: all 0.3s;
            color: white;
        }
        
        .social-login .social-btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 5px 10px rgba(0, 0, 0, 0.1);
        }
        
        .social-login .wechat {
            background: #07C160;
        }
        
        .social-login .qq {
            background: #12B7F5;
        }
        
        .social-login .weibo {
            background: #E6162D;
        }
        
        /* 动画效果 */
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        
        .shake {
            animation: shake 0.6s cubic-bezier(.36,.07,.19,.97) both;
        }
        
        @keyframes shake {
            10%, 90% {
                transform: translate3d(-1px, 0, 0);
            }
            20%, 80% {
                transform: translate3d(2px, 0, 0);
            }
            30%, 50%, 70% {
                transform: translate3d(-4px, 0, 0);
            }
            40%, 60% {
                transform: translate3d(4px, 0, 0);
            }
        }
        
        /* 通知样式 */
        .notification {
            position: fixed;
            top: 20px;
            right: 20px;
            padding: 15px 20px;
            background: white;
            border-left: 4px solid #3a86ff;
            border-radius: 4px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
            transform: translateX(120%);
            transition: transform 0.3s ease-out;
            z-index: 1000;
            display: flex;
            align-items: center;
        }
        
        .notification.show {
            transform: translateX(0);
        }
        
        .notification.error {
            border-left-color: #ff4d4f;
        }
        
        .notification.success {
            border-left-color: #52c41a;
        }
        
        .notification-icon {
            margin-right: 10px;
            font-size: 20px;
        }
        
        .notification.error .notification-icon {
            color: #ff4d4f;
        }
        
        .notification.success .notification-icon {
            color: #52c41a;
        }
        
        .notification-message {
            flex: 1;
        }
        
        .notification-close {
            margin-left: 10px;
            cursor: pointer;
            color: #999;
            transition: color 0.3s;
        }
        
        .notification-close:hover {
            color: #333;
        }
        
        /* 背景动画 */
        .bg-animation {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            z-index: -1;
            overflow: hidden;
        }
        
        .bg-animation .shape {
            position: absolute;
            border-radius: 50%;
            background: rgba(58, 134, 255, 0.1);
            animation: float 15s infinite ease-in-out;
        }
        
        .shape:nth-child(1) {
            width: 300px;
            height: 300px;
            top: 20%;
            left: 10%;
            animation-delay: 0s;
        }
        
        .shape:nth-child(2) {
            width: 200px;
            height: 200px;
            top: 60%;
            left: 20%;
            animation-delay: 2s;
        }
        
        .shape:nth-child(3) {
            width: 150px;
            height: 150px;
            top: 30%;
            right: 15%;
            animation-delay: 4s;
        }
        
        .shape:nth-child(4) {
            width: 250px;
            height: 250px;
            bottom: 20%;
            right: 10%;
            animation-delay: 6s;
        }
        
        @keyframes float {
            0%, 100% {
                transform: translateY(0) translateX(0);
            }
            25% {
                transform: translateY(-20px) translateX(20px);
            }
            50% {
                transform: translateY(0) translateX(40px);
            }
            75% {
                transform: translateY(20px) translateX(20px);
            }
        }
        
        /* 响应式设计 */
        @media (max-width: 480px) {
            .login-container {
                max-width: 100%;
            }
            
            .login-header h1 {
                font-size: 20px;
            }
            
            .login-button {
                font-size: 14px;
            }
        }