:root {
            --primary: #1a3a6e;
            --secondary: #e67e22;
            --text-light: #64748b;
            --accent: #3498db;
            --light-bg: #f8fafc;
            --border-color: rgba(0, 0, 0, 0.08);
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
            color: #333;
            line-height: 1.6;
            background-color: #fff;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        .article-header {
            padding: 5rem 0 2rem;
            background: linear-gradient(to bottom, #ffffff, #f8fafc);
            position: relative;
            z-index: 5;
            border-bottom: 1px solid var(--border-color);
        }

        .article-header .container {
            max-width: 800px;
            margin: 0 auto;
            padding: 0 2rem;
        }

        .article-title {
            font-size: clamp(2.5rem, 2.2rem + 1.2vw, 3.5rem);
            line-height: 1.2;
            color: var(--primary);
            text-align: center;
            margin: 0 auto 1.5rem;
            font-weight: 800;
            text-wrap: balance;
            letter-spacing: -0.02em;
        }

        .article-subtitle {
            font-size: clamp(1.3rem, 1.2rem + 0.4vw, 1.6rem);
            color: var(--text-light);
            text-align: center;
            max-width: 700px;
            margin: 0 auto 2.5rem;
            line-height: 1.5;
            font-weight: 400;
        }

        .article-meta {
            display: flex;
            justify-content: center;
            align-items: center;
            flex-wrap: nowrap;
            gap: 1.5rem;
            margin: 1.8rem auto 3rem;
            font-size: 0.95rem;
            color: var(--text-light);
            white-space: nowrap;
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
            padding: 1rem 1.5rem;
            width: fit-content;
            background: rgba(241, 245, 249, 0.6);
            border-radius: 50px;
            position: relative;
            z-index: 2;
            max-width: 95%;
        }

        .article-meta > span {
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }

        .article-meta > span::before {
            font-size: 1.1rem;
        }

        /* ========================
           正文内容极致优化
           ======================== */
        .article-content {
            padding: 2rem 0;
            background-color: #fff;
            font-size: clamp(1.08rem, 1rem + 0.3vw, 1.25rem);
            line-height: 1.75;
            font-kerning: normal;
            font-variant-ligatures: common-ligatures;
            text-rendering: optimizeLegibility;
            overflow-wrap: break-word;
            position: relative;
            z-index: 3;
        }

        .article-container {
            max-width: 80ch;
            margin: 0 auto;
            padding: 0 2rem;
        }

        .article-content p {
            margin: 1.8rem auto;
            line-height: 1.8;
            color: #333;
            text-align: left;
            position: relative;
            z-index: 1;
            word-spacing: -0.05em;
        }

        /* 首段特殊样式 */
        .article-content p:first-of-type {
            font-size: clamp(1.15rem, 1.05rem + 0.4vw, 1.35rem);
            line-height: 1.85;
            color: #444;
            font-weight: 450;
        }

        .article-content h2 {
            font-size: clamp(1.8rem, 1.6rem + 0.6vw, 2.3rem);
            color: var(--primary);
            margin: 3.5rem 0 1.8rem;
            line-height: 1.3;
            text-wrap: balance;
            position: relative;
            z-index: 2;
            font-weight: 700;
            letter-spacing: -0.015em;
        }
        .article-content h2::after {
            content: "";
            position: absolute;
            bottom: -0.8rem;
            left: 0;
            width: 4rem;
            height: 4px;
            background: var(--secondary);
            opacity: 0.8;
            z-index: 1;
            border-radius: 2px;
        }

        .article-content h3 {
            font-size: clamp(1.5rem, 1.35rem + 0.4vw, 1.75rem);
            color: var(--primary);
            margin: 3rem 0 1.5rem;
            line-height: 1.4;
            text-wrap: balance;
            position: relative;
            z-index: 2;
            font-weight: 650;
        }

        .article-content ul,
        .article-content ol {
            margin: 2rem 0;
            padding-left: 2.5rem;
            position: relative;
            z-index: 1;
        }
        .article-content li {
            margin-bottom: 0.9rem;
            line-height: 1.8;
            position: relative;
            padding-left: 0.5rem;
        }
        .article-content ul li::before {
            content: "•";
            color: var(--secondary);
            position: absolute;
            left: -1.5rem;
            font-weight: 700;
            font-size: 1.3rem;
            top: -0.1rem;
        }

        .article-content img {
            max-width: min(100%, 90ch);
            height: auto;
            margin: 3rem auto;
            border-radius: 8px;
            display: block;
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
            position: relative;
            z-index: 1;
        }

        .article-content figcaption {
            text-align: center;
            font-size: 0.95rem;
            color: var(--text-light);
            margin-top: 0.8rem;
            margin-bottom: 2rem;
            font-style: italic;
        }

        .article-content blockquote {
            border-left: 4px solid var(--secondary);
            padding: 1.8rem 2.2rem;
            margin: 3rem 0;
            background: rgba(26, 58, 110, 0.03);
            font-style: italic;
            color: #444;
            border-radius: 0 8px 8px 0;
            position: relative;
            z-index: 1;
            font-size: 1.1rem;
            line-height: 1.75;
        }

        .article-content blockquote p {
            margin: 0.8rem 0;
        }

        .article-content pre {
            margin: 2.5rem 0;
            padding: 1.6rem;
            background: #f8fafc;
            border-radius: 8px;
            overflow-x: auto;
            border-left: 4px solid var(--accent);
            position: relative;
            z-index: 1;
            font-size: 0.95rem;
            line-height: 1.6;
            box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.05);
        }

        .article-content code {
            font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
            font-size: 0.92rem;
        }

        .article-content a {
            color: var(--accent);
            text-decoration: none;
            background-image: linear-gradient(currentColor, currentColor);
            background-position: 0% 100%;
            background-repeat: no-repeat;
            background-size: 0% 2px;
            transition: background-size 0.3s ease, color 0.2s;
            padding-bottom: 2px;
            font-weight: 500;
            position: relative;
            z-index: 1;
        }
        .article-content a:hover {
            background-size: 100% 2px;
            color: #2980b9;
        }

        .article-content table {
            width: 100%;
            margin: 2.5rem 0;
            border-collapse: collapse;
            display: block;
            overflow-x: auto;
            position: relative;
            z-index: 1;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.04);
            border-radius: 8px;
            font-size: 0.95rem;
        }

        .article-content table th {
            background-color: #f1f5f9;
            padding: 0.9rem 1.2rem;
            text-align: left;
            font-weight: 600;
            color: var(--primary);
            border-bottom: 2px solid var(--border-color);
        }

        .article-content table td {
            padding: 0.8rem 1.2rem;
            border-bottom: 1px solid var(--border-color);
        }

        .article-content table tr:last-child td {
            border-bottom: none;
        }

        .article-content hr {
            margin: 3.5rem auto;
            border: 0;
            height: 1px;
            background: linear-gradient(to right, rgba(0,0,0,0), rgba(0,0,0,0.1), rgba(0,0,0,0));
            max-width: 70%;
        }

        /* ======= 移动端优化 ======= */
        @media (max-width: 768px) {
            .article-header {
                padding: 3.5rem 0 1.5rem;
            }
            
            .article-title {
                font-size: clamp(2rem, 1.8rem + 0.8vw, 2.5rem);
            }
            
            .article-meta {
                gap: 1rem;
                font-size: 0.9rem;
                justify-content: flex-start;
                padding: 0.9rem 1.2rem;
            }
            
            .article-container { 
                padding: 0 1.5rem; 
            }
            
            .article-content {
                padding: 1.5rem 0;
            }
            
            .article-content h2 {
                margin: 3rem 0 1.5rem;
            }
            
            .article-content pre {
                margin-left: -1.5rem;
                margin-right: -1.5rem;
                border-radius: 0;
                padding: 1.4rem;
            }
            
            .article-content ul,
            .article-content ol {
                padding-left: 2rem;
            }
        }

        @media (max-width: 480px) {
            .article-header {
                padding: 2.5rem 0 1rem;
            }
            
            .article-title {
                font-size: clamp(1.8rem, 1.7rem + 0.5vw, 2rem);
            }
            
            .article-meta {
                gap: 0.8rem;
                padding: 0.8rem;
                font-size: 0.85rem;
                max-width: 98%;
            }
            
            .article-container {
                padding: 0 1.2rem;
            }
            
            .article-content {
                font-size: 1.05rem;
            }
            
            .article-content p {
                margin: 1.6rem auto;
            }
            
            .article-content h2 {
                font-size: 1.7rem;
            }
            
            .article-content h3 {
                font-size: 1.45rem;
            }
            
            .article-content blockquote {
                padding: 1.4rem 1.6rem;
                margin: 2.5rem 0;
            }
            
            .article-content img {
                margin: 2.5rem auto;
            }
        }

        /* ========================
           其他部分优化
           ======================== */
        .article-navigation {
            display: flex;
            justify-content: space-between;
            margin: 4rem 0;
            padding: 2.5rem 0;
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
            position: relative;
            z-index: 3;
        }

        .nav-previous, .nav-next {
            flex: 1;
            position: relative;
            z-index: 2;
        }

        .nav-next {
            text-align: right;
        }

        .nav-label {
            font-size: 0.95rem;
            color: var(--text-light);
            margin-bottom: 0.7rem;
            display: block;
        }

        .nav-title {
            font-weight: 700;
            color: var(--primary);
            position: relative;
            transition: color 0.3s;
            line-height: 1.4;
        }

        .nav-title:hover {
            color: var(--secondary);
        }

        .related-articles {
            padding: 4rem 0;
            background: linear-gradient(to bottom, #f1f5f9, #e8edf4);
            position: relative;
            z-index: 4;
        }

        .related-title {
            text-align: center;
            margin-bottom: 3rem;
            font-size: 2rem;
            color: var(--primary);
            position: relative;
            z-index: 2;
        }

        .related-title::after {
            content: "";
            position: absolute;
            bottom: -1rem;
            left: 50%;
            transform: translateX(-50%);
            width: 70px;
            height: 4px;
            background: var(--secondary);
            border-radius: 2px;
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2.5rem;
            position: relative;
            z-index: 3;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 2rem;
        }
        
        .related-card {
            background: white;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
            transition: transform 0.3s, box-shadow 0.3s;
        }
        
        .related-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
        }
        
        .related-card img {
            width: 100%;
            height: 180px;
            object-fit: cover;
        }
        
        .related-card-content {
            padding: 1.5rem;
        }
        
        .related-card h3 {
            font-size: 1.3rem;
            margin-bottom: 0.8rem;
            color: var(--primary);
        }
        
        .related-card p {
            color: var(--text-light);
            font-size: 0.95rem;
            line-height: 1.6;
        }

        /* ========================
           文章页CTA模块 (优化版)
           ======================== */
        .article-cta {
            margin: 5rem auto 4rem;
            padding: 3rem;
            background: linear-gradient(to right, #1a3a6e, #152a4e);
            color: white;
            border-radius: 12px;
            border: none;
            box-shadow: 0 6px 25px rgba(0, 0, 0, 0.18), 
                        inset 0 0 0 1px rgba(255, 255, 255, 0.12);
            text-align: center;
            position: relative;
            overflow: hidden;
            max-width: 75ch;
            z-index: 4;
        }

        .article-cta::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100" preserveAspectRatio="none"><path d="M0,0 L100,0 L100,100 L0,100 Z" fill="none" stroke="rgba(255,255,255,0.1)" stroke-width="0.5"/></svg>');
            background-size: 50px 50px;
            opacity: 0.6;
            z-index: 1;
        }

        .article-cta-content {
            position: relative;
            z-index: 2;
        }

        .article-cta h3 {
            font-size: clamp(1.7rem, 1.5rem + 0.6vw, 2.1rem);
            color: white;
            margin-bottom: 1.5rem;
            line-height: 1.3;
            font-weight: 700;
            text-shadow: 0 2px 4px rgba(0, 0, 0, 0.25);
        }

        .article-cta p {
            color: rgba(255, 255, 255, 0.92);
            margin-bottom: 2.2rem;
            line-height: 1.75;
            font-size: 1.1rem;
            max-width: 55ch;
            margin-left: auto;
            margin-right: auto;
        }

        .article-cta .btn {
            display: inline-block;
            background-color: var(--secondary);
            color: white;
            padding: 0.95rem 2.8rem;
            border-radius: 8px;
            text-decoration: none;
            font-weight: 700;
            transition: all 0.3s;
            border: none;
            cursor: pointer;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
            position: relative;
            z-index: 2;
            font-size: 1.1rem;
            letter-spacing: 0.02em;
        }

        .article-cta .btn:hover {
            background-color: #d35400;
            transform: translateY(-3px);
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.4);
        }

        @media (max-width: 768px) {
            .article-cta {
                padding: 2.5rem 1.8rem;
                margin: 4rem auto 3rem;
            }
            
            .article-cta h3 {
                font-size: 1.6rem;
            }
            
            .article-cta p {
                font-size: 1.05rem;
            }
            
            .article-navigation {
                flex-direction: column;
                gap: 2rem;
            }
        }

        @media (max-width: 480px) {
            .article-cta {
                padding: 2rem 1.5rem;
                margin: 3.5rem auto 2.5rem;
            }
            
            .article-cta h3 {
                font-size: 1.5rem;
            }
            
            .article-cta p {
                font-size: 1rem;
            }
            
            .article-cta .btn {
                padding: 0.85rem 2.2rem;
                font-size: 1rem;
            }
        }