body {
            background: #F7F7F7;
            color: #4D4D4D;
        }
        .article-title h1 {
            font-size: 28px;
            font-weight: 600;
            margin-bottom: 10px;
            color: #000;
        }
        .article-tagline {
            padding-bottom: 16px;
            border-bottom: 1px solid #ddd;
            margin-bottom: 30px;
        }
        .article-img {
            width: 100%;
            display: block;
            margin-bottom: 30px;
        }
        .article-desc p {
            margin-bottom: 18px;
        }
        .article-desc strong {
            color: #000;
        }
        /* 标题与副标题入场：无位移，仅透明度渐显 */
        .article-title h1 {
            animation: fadeIn 0.7s ease both;
        }
        .article-tagline {
            animation: fadeIn 0.7s 0.1s ease both;
        }
        @keyframes fadeIn {
            0% { opacity: 0; }
            100% { opacity: 1; }
        }