.article-container {
            max-width: 1280px;
            margin: 0 auto;
            background: #ffffff;
            border-radius: 32px;
            box-shadow: 0 20px 40px -12px rgba(0,0,0,0.12);
            overflow: hidden;
            padding: 32px 36px 52px;
        }
        @media (max-width: 768px) {
            .article-container {
                padding: 20px 18px 40px;
            }
        }
        h1 {
            font-size: 2.2rem;
            font-weight: 800;
            background: linear-gradient(135deg, #1e3c72, #2a5298);
            background-clip: text;
            -webkit-background-clip: text;
            color: transparent;
            margin-bottom: 12px;
        }
        .lead {
            font-size: 1.1rem;
            color: #2c5a7a;
            border-left: 4px solid #2a7de1;
            padding-left: 20px;
            margin: 18px 0 28px 0;
        }
        .toc {
            background: #eef2f9;
            padding: 20px 28px;
            border-radius: 28px;
            margin: 25px 0 35px;
        }
        .toc h2 {
            font-size: 1.5rem;
            margin-top: 0;
            margin-bottom: 14px;
            border-bottom: none;
        }
        .toc-grid {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            list-style: none;
        }
        .toc-grid li {
            width: calc(50% - 12px);
        }
        @media (max-width: 600px) {
            .toc-grid li { width: 100%; }
        }
        .toc a {
            text-decoration: none;
            background: white;
            display: block;
            padding: 8px 16px;
            border-radius: 40px;
            font-weight: 500;
            color: #1f4e79;
            border: 1px solid #d4e0ec;
            transition: all 0.2s;
        }
        .toc a:hover {
            background: #2a7de1;
            color: white;
            border-color: #2a7de1;
        }
        h2 {
            font-size: 1.8rem;
            margin: 48px 0 20px 0;
            padding-bottom: 8px;
            border-bottom: 3px solid #e2eaf1;
            color: #0a3a5c;
        }
        h3 {
            font-size: 1.45rem;
            margin: 32px 0 14px 0;
            color: #1e5985;
        }
        p {
            margin-bottom: 1.2rem;
        }
        .method-card {
            background: #f9fbfe;
            border-radius: 24px;
            padding: 20px 24px;
            margin: 24px 0;
            border-left: 6px solid #2a7de1;
            box-shadow: 0 2px 8px rgba(0,0,0,0.03);
        }
        .badge {
            display: inline-block;
            background: #e0edfc;
            color: #1f5090;
            font-weight: 700;
            font-size: 0.75rem;
            padding: 4px 12px;
            border-radius: 30px;
            margin-bottom: 12px;
        }
        .spotlight {
            background: linear-gradient(115deg, #0b2f44, #124263);
            color: white;
            border-radius: 32px;
            padding: 32px 30px;
            margin: 50px 0 40px;
            box-shadow: 0 18px 28px -10px rgba(0,0,0,0.25);
        }
        .spotlight h2, .spotlight h3 {
            color: white;
            border-bottom-color: rgba(255,255,255,0.3);
        }
        .flex-features {
            display: flex;
            flex-wrap: wrap;
            gap: 24px;
            margin: 28px 0 15px;
        }
        .ft-card {
            background: rgba(255,255,255,0.12);
            backdrop-filter: blur(3px);
            border-radius: 24px;
            padding: 20px;
            flex: 1 1 240px;
            border: 1px solid rgba(255,255,255,0.25);
        }
        .ft-card h4 {
            font-size: 1.2rem;
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .comparison-table {
            overflow-x: auto;
            margin: 35px 0;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            background: #fff;
            border-radius: 20px;
            overflow: hidden;
            box-shadow: 0 1px 4px rgba(0,0,0,0.05);
        }
        th, td {
            border: 1px solid #dde5ef;
            padding: 12px 16px;
            text-align: left;
            vertical-align: top;
        }
        th {
            background: #eef3fc;
            font-weight: 700;
        }
        .faq-item {
            background: #f8fafd;
            border-radius: 20px;
            padding: 18px 22px;
            margin: 18px 0;
        }
        .faq-q {
            font-weight: 800;
            font-size: 1.08rem;
            margin-bottom: 8px;
            color: #0f4a6e;
        }
        .refs {
            background: #eff3f8;
            border-radius: 24px;
            padding: 20px 28px;
            margin: 40px 0 20px;
            font-size: 0.9rem;
        }
        footer {
            text-align: center;
            margin-top: 48px;
            padding-top: 24px;
            border-top: 1px solid #dce5ef;
            font-size: 0.8rem;
            color: #5c7c9e;
        }
        .keyword-em {
            font-weight: 600;
            color: #1f6e5c;
        }
        .link-list {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: 15px;
        }
        .link-list a {
            color: #aad0ff;
            text-decoration: none;
            background: rgba(255,255,255,0.15);
            padding: 4px 10px;
            border-radius: 30px;
            font-size: 0.75rem;
        }
        .link-list a:hover {
            background: rgba(255,255,255,0.3);
        }
        @media (prefers-color-scheme: dark) {
            body { background: #111827; }
            .article-container { background: #1e293b; color: #e6edf5; }
            h1 { background: linear-gradient(135deg,#9ec8f0,#60a5fa); background-clip: text; -webkit-background-clip: text; color: transparent; }
            h2, h3 { color: #cbd5e6; border-bottom-color: #334155; }
            .toc, .method-card, .faq-item, .refs, table, th, td { background: #0f172a; color: #e2e8f0; border-color: #2d3a4e; }
            .toc a { background: #1e2a3a; color: #b9d4f0; border-color: #334155; }
            .lead { color: #9bb5d0; }
            .badge { background: #233753; color: #b9e2ff; }
        }
        .note {
            background: #eef4ff;
            border-left: 4px solid #2a7de1;
            padding: 12px 18px;
            border-radius: 16px;
            margin: 20px 0;
            font-size: 0.9rem;
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