/* 完全独立模块 – 不影响外部页面布局 */
        .impedance-module * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        .impedance-module {
            display: block;
            font-family: 'Inter', 'Segoe UI', Roboto, system-ui, sans-serif;
            max-width: 100%;
            background: transparent;
            line-height: 1.5;
            color: #1a2b3c;
            position: relative;
        }

        .service-card {
            background: white;
            border-radius: 2rem;
            box-shadow: 0 25px 45px -15px rgba(199, 36, 177, 0.2);
            padding: 2rem 2rem;
            border: 1px solid rgba(199, 36, 177, 0.2);
            position: relative;
            overflow: hidden;
        }

        /* 背景音符 */
        .bg-note {
            position: absolute;
            font-size: 5rem;
            color: rgba(199, 36, 177, 0.03);
            pointer-events: none;
            font-family: 'Segoe UI', 'Arial Unicode MS', sans-serif;
            z-index: 0;
        }
        .bg-note-1 { top: 2%; left: -1%; transform: rotate(-8deg); }
        .bg-note-2 { bottom: 3%; right: -2%; transform: rotate(6deg); }
        .bg-note-3 { top: 20%; right: 5%; transform: rotate(10deg); font-size: 3.5rem; }

        /* 几何装饰线 */
        .geo-divider {
            width: 100%;
            height: 1px;
            background: repeating-linear-gradient(90deg, #c724b1, #c724b1 6px, transparent 6px, transparent 20px);
            opacity: 0.3;
            margin: 2rem 0;
        }

        /* 主色调 */
        .accent { color: #c724b1; }

        /* 核心理念 (顶部高亮) */
        .core-message {
            background: linear-gradient(135deg, #fef5fc, #fbf0f9);
            border-radius: 1.5rem;
            padding: 1.2rem 1.5rem;
            margin-bottom: 2rem;
            text-align: center;
            border: 1px solid rgba(199, 36, 177, 0.3);
            position: relative;
            z-index: 2;
            box-shadow: inset 0 1px 0 rgba(255,255,255,0.8), 0 4px 12px rgba(0,0,0,0.02);
        }
        .core-message p {
            font-size: 1rem;
            font-weight: 500;
            color: #c724b1;
        }

        /* 角色区块 – 两层卡片结构增加层次 */
        .role-section {
            display: flex;
            flex-wrap: wrap;
            gap: 2rem;
            margin: 1rem 0 0.5rem;
            position: relative;
            z-index: 2;
        }
        .role-card {
            flex: 1;
            background: #ffffff;
            border-radius: 1.5rem;
            padding: 1.2rem 1.2rem;
            border: 1px solid rgba(199, 36, 177, 0.2);
            box-shadow: 0 6px 14px -6px rgba(0,0,0,0.05);
            transition: all 0.2s;
        }
        .role-card:hover {
            border-color: #c724b1;
            box-shadow: 0 12px 20px -12px rgba(199, 36, 177, 0.15);
        }
        .role-title {
            font-size: 1.1rem;
            font-weight: 600;
            margin-bottom: 1rem;
            color: #c724b1;
            display: flex;
            align-items: center;
            gap: 8px;
            padding-bottom: 0.5rem;
            border-bottom: 2px dotted rgba(199, 36, 177, 0.3);
        }
        .role-title .note {
            font-size: 1rem;
        }

        /* 信息网格 – 用在角色卡片内部 */
        .info-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 0.8rem;
        }
        .info-item {
            background: #faf5fc;
            border-radius: 1rem;
            padding: 0.7rem 1rem;
            text-align: center;
            border: 1px solid rgba(199, 36, 177, 0.15);
            transition: all 0.1s;
        }
        .info-item .label {
            font-size: 0.75rem;
            color: #c724b1;
            font-weight: 600;
            margin-bottom: 0.2rem;
            letter-spacing: 0.3px;
        }
        .info-item .value {
            font-size: 0.9rem;
            font-weight: 500;
            color: #1a2b3c;
        }

        /* 服务步骤网格 */
        .service-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 0.8rem;
        }
        .service-step {
            background: linear-gradient(145deg, #fff6fe, #fef0fd);
            border-radius: 0.8rem;
            padding: 0.7rem 0.5rem;
            text-align: center;
            border: 1px solid rgba(199, 36, 177, 0.2);
        }
        .step-num {
            font-size: 1rem;
            font-weight: 700;
            color: #c724b1;
            margin-bottom: 0.2rem;
        }
        .step-desc {
            font-size: 0.8rem;
            color: #2c3e50;
        }

        /* 协作流程表格 (优化阅读体验) */
        .process-table {
            width: 100%;
            border-collapse: collapse;
            margin: 1rem 0 1rem;
            background: white;
            border-radius: 1rem;
            overflow: hidden;
            border: 1px solid rgba(199, 36, 177, 0.2);
            position: relative;
            z-index: 2;
            box-shadow: 0 4px 12px rgba(0,0,0,0.02);
        }
        .process-table th, .process-table td {
            padding: 1rem 1.2rem;
            text-align: left;
            border-bottom: 1px solid rgba(199, 36, 177, 0.1);
        }
        .process-table th {
            background: #faf5fc;
            color: #c724b1;
            font-weight: 600;
            font-size: 0.9rem;
        }
        .process-table td {
            color: #2c3e50;
            font-size: 0.85rem;
        }
        .process-table tr:last-child td,
        .process-table tr:last-child th {
            border-bottom: none;
        }
        .customer-action {
            background: #fefafd;
        }

        /* 底部促销 */
        .promo-footer {
            text-align: center;
            margin-top: 2rem;
            padding: 0.8rem 1rem;
            background: linear-gradient(115deg, #fef5fc, #fef9fd);
            border-radius: 2rem;
            border: 1px solid rgba(199, 36, 177, 0.3);
            position: relative;
            z-index: 2;
        }
        .promo-footer .highlight {
            font-weight: 700;
            color: #c724b1;
        }

        .footer-line {
            text-align: center;
            color: #c724b1;
            font-size: 0.75rem;
            margin-top: 1.5rem;
            padding-top: 0.8rem;
            border-top: 1px dashed rgba(199, 36, 177, 0.3);
        }

        @media (max-width: 800px) {
            .service-card { padding: 1.5rem; }
            .role-section { flex-direction: column; gap: 1.5rem; }
            .service-grid { grid-template-columns: 1fr; }
            .process-table th, .process-table td { padding: 0.8rem; }
        }
        @media (max-width: 480px) {
            .bg-note-1, .bg-note-2, .bg-note-3 { display: none; }
        }