/* 仅定义内容区样式，与头部底部完美兼容 */
        .programs-showcase {
            background-color: #f7f9fc;   /* 外层浅底色衬托白色卡片，但不影响全局 */
            padding: 3rem 0 4rem;
        }
        /* 简介区域样式 */
        .intro-text {
            text-align: center;
            max-width: 860px;
            margin: 0 auto 3rem auto;
            font-size: 1.06rem;
            color: #444;
            line-height: 1.55;
            background: transparent;
            padding: 0 1rem;
        }
        /* 一行三列卡片容器 */
        .row-custom {
            display: flex;
            flex-wrap: wrap;
            gap: 2rem;
            justify-content: center;
        }
        .card-item {
            flex: 1;
            min-width: 260px;
			max-width:33%;
            background: #ffffff;
            overflow: hidden;
            box-shadow: 0 12px 28px rgba(0, 0, 0, 0.05);
            transition: transform 0.25s ease, box-shadow 0.25s ease;
        }
        .card-item:hover {
            transform: translateY(-5px);
            box-shadow: 0 22px 32px rgba(0, 0, 0, 0.08);
        }
        .card-img {
            width: 90%;
            display: block;
			margin:0px auto;
			margin-top:5%;
        }
        .card-body {
            padding: 1.5rem;
        }
		.card-zhiwei{color:#999;}
        /* 标题颜色 #20477c */
        .card-title {
            font-size: 1.45rem;
            font-weight: 700;
            color: #20477c;
            margin-bottom: 0.75rem;
            line-height: 1.3;
        }
        /* 简介颜色 #444 */
        .card-description {
            font-size: 0.95rem;
            color: #444;
            line-height: 1.5;
            margin-bottom: 0;
        }
        /* 响应式适配：平板和手机 */
        @media (max-width: 991.98px) {
            .programs-showcase {
                padding: 2rem 0;
            }
            .intro-text {
                font-size: 1rem;
                margin-bottom: 2rem;
            }
            .card-title {
                font-size: 1.3rem;
            }
            .card-description {
                font-size: 0.9rem;
            }
        }
        @media (max-width: 767.98px) {
            .intro-text {
                font-size: 0.94rem;
                padding: 0 0.5rem;
            }
            .card-body {
                padding: 1.2rem;
            }
			.row-custom{display:block;}
			.card-item{width:98%;float:left;min-width:auto;margin:1%;max-width:98%;}
			.programs-showcase{overflow:hidden;}
            .card-title {
                font-size: 1.15rem;
            }
            .card-description {
                font-size: 0.85rem;
            }
            .row-custom {
                gap: 1.5rem;
            }
        }
        /* 优雅间距 */
        .extra-margin {
            margin-bottom: 0;
        }