/* 登录页面专用样式 */
        body {
            display: flex;
            align-items: center;
            justify-content: center;
            min-height: 100vh;
            padding: 20px;
            overflow: hidden;
        }

        .login-container {
            width: 100%;
            max-width: 440px;
            position: relative;
            z-index: 1;
        }

        .login-card {
            background: linear-gradient(135deg, rgba(26, 26, 46, 0.95) 0%, rgba(15, 15, 35, 0.95) 100%);
            backdrop-filter: blur(20px);
            border: 1px solid var(--border-color);
            border-radius: 24px;
            padding: 48px 40px;
            box-shadow: 
                0 20px 60px rgba(0, 0, 0, 0.5),
                0 0 0 1px rgba(255, 255, 255, 0.05) inset;
            animation: slideUp 0.6s cubic-bezier(0.16, 1, 0.3, 1);
            position: relative;
            overflow: hidden;
        }

        .login-card::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(circle, rgba(102, 126, 234, 0.1) 0%, transparent 70%);
            animation: rotate 20s linear infinite;
            pointer-events: none;
        }

        @keyframes slideUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        @keyframes rotate {
            from {
                transform: rotate(0deg);
            }
            to {
                transform: rotate(360deg);
            }
        }

        .login-header {
            text-align: center;
            margin-bottom: 40px;
            position: relative;
            z-index: 1;
        }

        .login-logo {
            width: 80px;
            height: 80px;
            margin: 0 auto 24px;
            background: var(--gradient-blue);
            border-radius: 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 36px;
            color: #ffffff;
            box-shadow: 
                0 8px 24px rgba(102, 126, 234, 0.4),
                0 0 0 4px rgba(102, 126, 234, 0.1);
            animation: pulse 2s ease-in-out infinite;
        }

        @keyframes pulse {
            0%, 100% {
                box-shadow: 
                    0 8px 24px rgba(102, 126, 234, 0.4),
                    0 0 0 4px rgba(102, 126, 234, 0.1);
            }
            50% {
                box-shadow: 
                    0 12px 32px rgba(102, 126, 234, 0.6),
                    0 0 0 8px rgba(102, 126, 234, 0.15);
            }
        }

        .login-title {
            font-size: 28px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
            background: var(--gradient-blue);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .login-subtitle {
            font-size: 14px;
            color: var(--text-secondary);
            margin: 0;
        }

        .login-form {
            position: relative;
            z-index: 1;
        }

        .form-group {
            margin-bottom: 24px;
        }

        .form-group label {
            display: block;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-primary);
            margin-bottom: 8px;
        }

        .form-control {
            width: 100%;
            padding: 14px 16px;
            background: rgba(26, 26, 46, 0.6);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            color: var(--text-primary);
            font-size: 15px;
            transition: all 0.3s ease;
            backdrop-filter: blur(10px);
        }

        .form-control:focus {
            outline: none;
            border-color: #667eea;
            background: rgba(26, 26, 46, 0.8);
            box-shadow: 
                0 0 0 3px rgba(102, 126, 234, 0.1),
                0 4px 12px rgba(0, 0, 0, 0.2);
        }

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

        .input-wrapper {
            position: relative;
        }

        .input-icon {
            position: absolute;
            left: 16px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--text-muted);
            font-size: 16px;
            pointer-events: none;
        }

        .input-wrapper .form-control {
            padding-left: 48px;
        }

        .btn-login {
            width: 100%;
            padding: 16px;
            background: var(--gradient-blue);
            border: none;
            border-radius: 12px;
            color: #ffffff;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
            margin-top: 8px;
            box-shadow: 0 4px 16px rgba(102, 126, 234, 0.4);
        }

        .btn-login::before {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            width: 0;
            height: 0;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.2);
            transform: translate(-50%, -50%);
            transition: width 0.6s ease, height 0.6s ease;
        }

        .btn-login:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(102, 126, 234, 0.5);
        }

        .btn-login:hover::before {
            width: 300px;
            height: 300px;
        }

        .btn-login:active {
            transform: translateY(0);
        }

        .alert-error {
            padding: 14px 16px;
            background: rgba(239, 68, 68, 0.1);
            border: 1px solid rgba(239, 68, 68, 0.3);
            border-radius: 12px;
            color: #fca5a5;
            font-size: 14px;
            margin-bottom: 24px;
            display: flex;
            align-items: center;
            gap: 10px;
            position: relative;
            z-index: 1;
            animation: shake 0.5s ease;
        }

        @keyframes shake {
            0%, 100% { transform: translateX(0); }
            25% { transform: translateX(-10px); }
            75% { transform: translateX(10px); }
        }

        .alert-error i {
            font-size: 16px;
        }

        .login-footer {
            margin-top: 32px;
            text-align: center;
            position: relative;
            z-index: 1;
        }

        .login-footer p {
            font-size: 12px;
            color: var(--text-muted);
            margin: 0;
            line-height: 1.6;
        }

        .login-footer strong {
            color: var(--text-secondary);
        }

        /* 响应式设计 */
        @media (max-width: 480px) {
            .login-card {
                padding: 36px 24px;
                border-radius: 20px;
            }

            .login-logo {
                width: 64px;
                height: 64px;
                font-size: 28px;
                margin-bottom: 20px;
            }

            .login-title {
                font-size: 24px;
            }

            .login-subtitle {
                font-size: 13px;
            }
        }