/* ----- 完全隔离的模块 – 不影响外部页面 ----- */
        .smiery-guide * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        .smiery-guide {
            display: block;
            font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
            max-width: 1340px;
            margin: 0 auto;
            background: transparent;
            line-height: 1.5;
        }

        /* PCB families 标题 */
        .guide-header {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 2.5rem;
            padding-bottom: 0.8rem;
            border-bottom: 2px solid #c724b1;
        }
        .guide-header .header-icon {
            font-size: 2.2rem;
            color: #c724b1;
            font-style: normal;
        }
        .guide-header .header-title {
            font-size: 1.8rem;
            font-weight: 600;
            color: #1e293b;
        }

        /* SMIERY权益说明 */
        .smiery-note {
            background: #fcf2fb;
            border-radius: 60px;
            padding: 0.8rem 1.8rem;
            margin-bottom: 2rem;
            display: inline-flex;
            align-items: center;
            gap: 10px;
            border-left: 4px solid #c724b1;
            font-size: 0.95rem;
            color: #1e293b;
            flex-wrap: wrap;
        }
        .smiery-note i {
            font-size: 1.4rem;
            color: #c724b1;
            font-style: normal;
        }
        .smiery-note strong {
            color: #c724b1;
            font-weight: 600;
        }

        /* 网格布局 - 调整为flex布局以便第三行居中 */
        .card-grid {
            display: flex;
            flex-wrap: wrap;
            gap: 2rem 1.8rem;
            margin: 1.5rem 0;
        }

        /* 卡片 - 固定宽度 */
        .card-item {
            background: white;
            border-radius: 28px;
            box-shadow: 0 12px 28px -10px rgba(0, 0, 0, 0.08);
            border: 1px solid #f0e0ef;
            transition: all 0.25s ease;
            display: flex;
            flex-direction: column;
            overflow: hidden;
            height: 100%;
            width: calc((100% - 3.6rem) / 3); /* 三列布局，减去gap总和 */
            min-width: 280px;
        }
        .card-item:hover {
            box-shadow: 0 20px 32px -14px rgba(199, 36, 177, 0.4);
            border-color: #c724b1;
            transform: translateY(-5px);
        }

        /* 图片容器 */
        .card-image {
            width: 100%;
            aspect-ratio: 16 / 9;
            background-color: #ffffff;
            background-size: contain;
            background-repeat: no-repeat;
            background-position: center;
            border-bottom: 3px solid #c724b1;
        }

        /* 标题区域 */
        .card-title {
            padding: 1.1rem 1.2rem;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 8px;
            border-bottom: 1px solid rgba(199, 36, 177, 0.15);
            position: relative;
        }

        .title-link {
            text-decoration: none;
            color: #1e1e1e;
            font-size: 1.28rem;
            font-weight: 540;
            line-height: 1.3;
            transition: color 0.2s;
            flex: 1;
            text-decoration: none !important;
        }
        .title-link:hover {
            color: #c724b1;
            text-decoration: none !important;
        }

        /* 箭头灵动效果 */
        .arrow-icon {
            color: #c724b1;
            font-weight: 600;
            font-size: 1rem;
            background: rgba(199, 36, 177, 0.08);
            width: 32px;
            height: 32px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: 30px;
            transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
            flex-shrink: 0;
            margin-left: 4px;
            position: relative;
            cursor: default;
        }
        
        .card-item:hover .arrow-icon {
            background: #c724b1;
            color: white;
            transform: translateX(8px) scale(1.15);
            box-shadow: 0 4px 12px rgba(199, 36, 177, 0.3);
        }
        
        @keyframes arrow-pulse {
            0% { box-shadow: 0 0 0 0 rgba(199, 36, 177, 0.4); }
            70% { box-shadow: 0 0 0 6px rgba(199, 36, 177, 0); }
            100% { box-shadow: 0 0 0 0 rgba(199, 36, 177, 0); }
        }
        
        .card-item:hover .arrow-icon {
            animation: arrow-pulse 1.5s infinite;
        }

        /* 权益提示 */
        .benefit-note {
            padding: 0.8rem 1.2rem 1.2rem;
            font-size: 0.85rem;
            color: #c724b1;
            display: flex;
            align-items: center;
            gap: 6px;
            border-top: 1px dashed rgba(199, 36, 177, 0.25);
            margin-top: auto;
        }
        .benefit-note i {
            font-size: 1rem;
            color: #c724b1;
            font-style: normal;
        }
        .benefit-note span {
            color: #4a5568;
            flex: 1;
        }

        /* 第三行容器 - 居中显示单个卡片 */
        .row-centered {
            display: flex;
            justify-content: center;
            width: 100%;
            margin-top: 0;
        }

        /* 图片类 */
        .img-1 { background-image: url('//ueeshop.ly200-cdn.com/u_file/UPBC/UPBC551/2603/20/photo/UltrathinFR4FPC.png'); }
        .img-2 { background-image: url('//ueeshop.ly200-cdn.com/u_file/UPBC/UPBC551/2504/27/photo/CASE-STUDENTPCBs.png'); }
        .img-3 { background-image: url('//ueeshop.ly200-cdn.com/u_file/UPBC/UPBC551/2504/27/photo/PCBfabrication.png'); }
        .img-4 { background-image: url('//ueeshop.ly200-cdn.com/u_file/UPBC/UPBC551/2505/30/photo/2025052901carpcb.png'); }
        .img-5 { background-image: url('//ueeshop.ly200-cdn.com/u_file/UPBC/UPBC551/2504/27/photo/CASE-HightTech-PCBs.png'); }
        .img-6 { background-image: url('//ueeshop.ly200-cdn.com/u_file/UPBC/UPBC551/2503/18/photo/LEDFR4Aluminumplate.png'); }
        .img-7 { background-image: url('//ueeshop.ly200-cdn.com/u_file/UPBC/UPBC551/2505/29/photo/EMI-SheildedmultilayerPCBs.png'); }

        /* 底部色带 */
        .footer-rail {
            margin-top: 3rem;
            height: 4px;
            background: linear-gradient(90deg, #c724b1 20%, #dea1da 70%, transparent);
            width: 100%;
            border-radius: 4px;
        }

        /* 响应式 */
        @media (max-width: 900px) {
            .card-item {
                width: calc((100% - 1.8rem) / 2); /* 两列布局 */
            }
        }
        
        @media (max-width: 700px) {
            .guide-header { 
                flex-wrap: wrap; 
            }
            .smiery-note {
                border-radius: 30px;
                padding: 0.7rem 1.2rem;
            }
            .card-title {
                padding: 1rem 1rem;
            }
            .title-link {
                font-size: 1.1rem;
            }
            .card-item {
                width: 100%; /* 单列布局 */
            }
        }