/* 登录模态框样式 */
        .login-modal {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0, 0, 0, 0.5);
            z-index: 2000;
            align-items: center;
            justify-content: center;
            padding: 20px;
        }
        
        .login-modal.active {
            display: flex;
        }
        
        .login-modal-content {
            background: white;
            border-radius: 20px;
            padding: 30px 25px;
            width: 100%;
            max-width: 380px;
            position: relative;
            box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
        }
        
        .login-logo-section {
            text-align: center;
            margin-bottom: 30px;
        }
        
        .login-logo {
            width: 70px;
            height: 70px;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 15px;
            font-size: 36px;
            box-shadow: 0 5px 15px rgba(102, 126, 234, 0.3);
        }
        
        .login-welcome-text {
            font-size: 22px;
            font-weight: 700;
            color: #1e293b;
            margin-bottom: 8px;
        }
        
        .login-welcome-desc {
            font-size: 13px;
            color: #64748b;
            line-height: 1.6;
        }
        
        .login-methods {
            display: flex;
            flex-direction: column;
            gap: 12px;
            margin-bottom: 20px;
        }
        
        .login-method-btn {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
            padding: 14px 16px;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            border: none;
            border-radius: 12px;
            font-size: 15px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s;
            box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
        }
        
        .login-method-btn:active {
            transform: scale(0.98);
            box-shadow: 0 2px 8px rgba(102, 126, 234, 0.2);
        }
        
        .login-method-btn i {
            font-size: 18px;
        }
        
        .login-agreement {
            display: flex;
            align-items: flex-start;
            font-size: 11px;
            color: #64748b;
            line-height: 1.5;
            margin-bottom: 15px;
        }
        
        .login-agreement input[type="checkbox"] {
            margin-right: 6px;
            margin-top: 3px;
            cursor: pointer;
            flex-shrink: 0;
        }
        
        .login-agreement label {
            cursor: pointer;
        }
        
        .login-agreement a {
            color: #667eea;
            text-decoration: none;
        }
        
        .login-agreement a:hover {
            text-decoration: underline;
        }
        
        .login-close {
            position: absolute;
            top: 15px;
            right: 15px;
            width: 32px;
            height: 32px;
            background: #f0f1f7;
            border: none;
            border-radius: 50%;
            font-size: 18px;
            color: #64748b;
            cursor: pointer;
            transition: all 0.2s;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        
        .login-close:active {
            background: #e2e8f0;
        }
        
        @media (max-width: 480px) {
            .login-modal-content {
                max-width: 100%;
                padding: 25px 20px;
            }
        }