* { margin: 0; padding: 0; box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body {
            font-family: "SF Pro Display", "Helvetica Neue", "Segoe UI", Arial, sans-serif;
            background: linear-gradient(135deg, #f0f4f8 0%, #e2ecf5 50%, #f7f3ec 100%);
            color: #2d3748;
            margin: 0;
            padding: 20px;
            min-height: 100vh;
            -webkit-font-smoothing: antialiased;
        }
        .container { max-width: 800px; margin: 0 auto; }
        .article {
            background: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border-radius: 20px;
            padding: 36px 40px;
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.6);
        }
        .top-bar { display: flex; justify-content: space-between; align-items: center; margin-bottom: 22px; flex-wrap: wrap; gap: 10px; }
        .back-link {
            display: inline-block; color: #3182ce; text-decoration: none; font-weight: 500;
            font-size: 14px; padding: 8px 16px; border-radius: 999px;
            background: rgba(49, 130, 206, 0.08); border: 1px solid rgba(49, 130, 206, 0.2);
            transition: all 0.3s;
        }
        .back-link:hover { background: #3182ce; color: #fff; }
        h1 { font-size: 1.7rem; line-height: 1.45; margin-bottom: 8px; }
        .meta { color: #718096; font-size: 13px; margin-bottom: 26px; }
        .article-body { font-size: 16.5px; line-height: 1.9; color: #334155; }
        .article-body h2 { font-size: 1.3rem; margin: 34px 0 14px; padding-left: 12px; border-left: 4px solid #3182ce; line-height: 1.5; }
        .article-body h3 { font-size: 1.1rem; margin: 26px 0 10px; color: #2d5a87; }
        .article-body p { margin: 0 0 16px; text-align: justify; }
        .article-body blockquote {
            margin: 18px 0; padding: 14px 18px;
            background: rgba(49, 130, 206, 0.06); border-left: 4px solid #7c9ec9;
            border-radius: 0 10px 10px 0; color: #4a5568; font-size: 15.5px;
        }
        .article-body ul, .article-body ol { margin: 0 0 16px 22px; }
        .article-body li { margin-bottom: 6px; }
        .article-body strong { color: #1a3a5c; }
        .article-body hr { border: none; border-top: 1px dashed #d1d9e2; margin: 26px 0; }
        .pager {
            display: flex; justify-content: space-between; gap: 12px;
            margin-top: 30px; padding-top: 22px; border-top: 1px solid rgba(49, 130, 206, 0.15);
        }
        .pager a { color: #3182ce; text-decoration: none; font-size: 14px; max-width: 45%; transition: opacity 0.2s; }
        .pager a:hover { opacity: 0.75; }
        .pager .next { text-align: right; }
        .pager .empty { visibility: hidden; }
        .top-btn {
            position: fixed; bottom: 24px; right: 24px; width: 40px; height: 40px;
            border-radius: 50%; border: none; background: #3182ce; color: #fff; cursor: pointer;
            display: none; align-items: center; justify-content: center;
            box-shadow: 0 4px 14px rgba(49, 130, 206, 0.4); transition: all 0.3s; z-index: 100;
        }
        .top-btn:hover { transform: translateY(-2px); }
        .top-btn.show { display: flex; }
        @media (max-width: 640px) {
            body { padding: 12px; }
            .article { padding: 24px 18px; border-radius: 16px; }
            h1 { font-size: 1.35rem; }
            .article-body { font-size: 15.5px; }
        }
        @media (prefers-reduced-motion: reduce) { *, *::before, *::after { animation: none !important; transition: none !important; } }