#pcc_crm_container {
            max-width: 900px;
            margin: 30px auto;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
            color: #333;
            line-height: 1.6;
        }

        .crm-main-title {
            text-align: center;
            color: #0073aa;
            text-transform: uppercase;
            font-weight: 800;
            font-size: 22px;
            margin-bottom: 25px;
        }

        .crm-section {
            background: #fff;
            border: 1px solid #e0e0e0;
            border-radius: 8px;
            padding: 25px;
            margin-bottom: 25px;
            box-shadow: 0 2px 10px rgba(0,0,0,0.05);
        }

        .crm-section-title {
            font-size: 16px;
            font-weight: 700;
            color: #1d2327;
            margin-bottom: 20px;
            padding-bottom: 8px;
            border-bottom: 2px solid #f0f0f1;
            text-transform: uppercase;
        }

        /* Grid Layout */
        .crm-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr); /* Mặc định 3 cột */
            gap: 15px 20px;
        }

        .crm-col-2 { grid-column: span 2; }
        .crm-full { grid-column: span 3; }

        .crm-group label {
            display: block;
            font-weight: 600;
            margin-bottom: 6px;
            font-size: 13px;
            color: #50575e;
        }

        .crm-group input, .crm-group select, .crm-group textarea {
            width: 100%;
            padding: 10px 12px;
            border: 1px solid #8c8f94;
            border-radius: 4px;
            font-size: 14px;
            background: #fff;
            box-sizing: border-box;
        }

        .crm-group input:focus, .crm-group select:focus {
            border-color: #2271b1;
            box-shadow: 0 0 0 1px #2271b1;
            outline: none;
        }

        hr.crm-divider {
            grid-column: span 3;
            border: 0;
            border-top: 1px dashed #ddd;
            margin: 10px 0;
        }

        #btn_submit_crm {
            background: #2271b1;
            color: #fff;
            border: none;
            padding: 15px;
            border-radius: 4px;
            width: 100%;
            font-size: 16px;
            font-weight: 700;
            cursor: pointer;
            transition: 0.2s;
        }

        #btn_submit_crm:hover { background: #135e96; }

        #crm_msg {
            margin-top: 20px;
            padding: 15px;
            border-radius: 4px;
            display: none;
            font-size: 14px;
        }

        @media (max-width: 768px) {
            .crm-grid { grid-template-columns: 1fr; }
            .crm-full, .crm-col-2 { grid-column: span 1; }
            hr.crm-divider { grid-column: span 1; }
        }