:root {
            --primary: #1a237e;
            --primary-light: #534bae;
            --primary-dark: #000051;
            --secondary: #ff5722;
            --secondary-light: #ff8a50;
            --text-dark: #212121;
            --text-light: #757575;
            --background: #f5f5f7;
            --surface: #ffffff;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
            --border-radius: 12px;
            --transition: all 0.3s ease;
            --max-width: 1200px;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
            line-height: 1.7;
            color: var(--text-dark);
            background-color: var(--background);
            font-size: 18px;
            overflow-x: hidden;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--secondary);
        }
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: linear-gradient(135deg, var(--primary-dark), var(--primary));
            color: white;
            padding: 1rem 0;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 900;
            letter-spacing: -1px;
            color: white;
            text-shadow: 0 2px 4px rgba(0,0,0,0.3);
        }
        .my-logo span {
            color: var(--secondary-light);
        }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .main-nav a {
            color: white;
            font-weight: 600;
            font-size: 1.1rem;
            padding: 0.5rem 0;
            position: relative;
        }
        .main-nav a:hover {
            color: var(--secondary-light);
        }
        .main-nav a::after {
            content: '';
            position: absolute;
            width: 0;
            height: 3px;
            background: var(--secondary-light);
            bottom: 0;
            left: 0;
            transition: width 0.3s ease;
        }
        .main-nav a:hover::after {
            width: 100%;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
        }
        .breadcrumb {
            background-color: var(--surface);
            padding: 1rem;
            border-radius: var(--border-radius);
            margin: 1rem auto;
            box-shadow: var(--shadow);
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
            gap: 0.5rem;
        }
        .breadcrumb li:not(:last-child)::after {
            content: '>';
            margin-left: 0.5rem;
            color: var(--text-light);
        }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2.5rem;
            margin: 2rem auto;
        }
        @media (max-width: 992px) {
            .main-content {
                grid-template-columns: 1fr;
            }
        }
        .article-card {
            background: var(--surface);
            border-radius: var(--border-radius);
            padding: 2.5rem;
            box-shadow: var(--shadow);
            margin-bottom: 2rem;
        }
        .article-header {
            border-bottom: 3px solid var(--primary);
            padding-bottom: 1.5rem;
            margin-bottom: 2rem;
        }
        h1 {
            font-size: 3.2rem;
            line-height: 1.2;
            color: var(--primary-dark);
            margin-bottom: 1rem;
        }
        h2 {
            font-size: 2.2rem;
            color: var(--primary);
            margin: 2.5rem 0 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px dashed #e0e0e0;
        }
        h3 {
            font-size: 1.7rem;
            color: var(--primary-light);
            margin: 2rem 0 1rem;
        }
        h4 {
            font-size: 1.4rem;
            color: var(--text-light);
            margin: 1.5rem 0 1rem;
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        .lead {
            font-size: 1.4rem;
            color: var(--text-light);
            font-weight: 300;
            margin-bottom: 2rem;
        }
        .highlight {
            background: linear-gradient(120deg, #e1f5fe 0%, #e1f5fe 100%);
            border-left: 5px solid var(--primary);
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
        }
        .featured-image {
            width: 100%;
            border-radius: var(--border-radius);
            margin: 2rem 0;
            box-shadow: 0 8px 25px rgba(0,0,0,0.15);
            transition: transform 0.5s ease;
        }
        .featured-image:hover {
            transform: scale(1.01);
        }
        .link-list {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 1rem;
            margin: 2rem 0;
        }
        .link-list a {
            display: block;
            background: var(--surface);
            padding: 1rem;
            border-radius: 8px;
            border: 1px solid #e0e0e0;
            transition: var(--transition);
        }
        .link-list a:hover {
            border-color: var(--primary);
            box-shadow: 0 4px 12px rgba(26, 35, 126, 0.1);
        }
        .sidebar-widget {
            background: var(--surface);
            border-radius: var(--border-radius);
            padding: 1.5rem;
            margin-bottom: 1.5rem;
            box-shadow: var(--shadow);
        }
        .widget-title {
            font-size: 1.3rem;
            color: var(--primary);
            margin-bottom: 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #f0f0f0;
        }
        .search-form, .comment-form, .rating-form {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }
        input, textarea, select {
            padding: 0.8rem;
            border: 1px solid #ddd;
            border-radius: 8px;
            font-family: inherit;
            font-size: 1rem;
            transition: var(--transition);
        }
        input:focus, textarea:focus, select:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(26, 35, 126, 0.1);
        }
        button, .btn {
            background: linear-gradient(to right, var(--primary), var(--primary-light));
            color: white;
            border: none;
            padding: 0.9rem 1.5rem;
            border-radius: 8px;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
        }
        button:hover, .btn:hover {
            background: linear-gradient(to right, var(--primary-dark), var(--primary));
            transform: translateY(-2px);
            box-shadow: 0 6px 12px rgba(0,0,0,0.15);
        }
        .stars {
            display: flex;
            gap: 0.5rem;
            margin: 0.5rem 0;
            direction: ltr;
        }
        .star {
            color: #ddd;
            cursor: pointer;
            font-size: 1.5rem;
            transition: color 0.2s;
        }
        .star.active, .star:hover, .star:hover ~ .star {
            color: #ffc107;
        }
        .site-footer {
            background: var(--primary-dark);
            color: white;
            padding: 3rem 0 1.5rem;
            margin-top: 3rem;
        }
        .footer-container {
            display: flex;
            flex-direction: column;
            align-items: center;
            text-align: center;
        }
        .friend-links {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 1.5rem;
            margin: 2rem 0;
        }
        friend-link a {
            color: #bbdefb;
            padding: 0.5rem 1rem;
            border: 1px solid rgba(255,255,255,0.1);
            border-radius: 6px;
        }
        friend-link a:hover {
            color: white;
            border-color: var(--secondary);
            background: rgba(255,87,34,0.1);
        }
        .copyright {
            margin-top: 2rem;
            padding-top: 1.5rem;
            border-top: 1px solid rgba(255,255,255,0.1);
            width: 100%;
            color: #b0bec5;
            font-size: 0.95rem;
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
            .main-nav {
                position: fixed;
                top: 80px;
                left: -100%;
                width: 100%;
                background: var(--primary);
                transition: left 0.4s ease;
                padding: 2rem;
                box-shadow: 0 10px 20px rgba(0,0,0,0.2);
            }
            .main-nav.active {
                left: 0;
            }
            .main-nav ul {
                flex-direction: column;
                gap: 1.5rem;
            }
            h1 {
                font-size: 2.5rem;
            }
            h2 {
                font-size: 1.9rem;
            }
            .article-card {
                padding: 1.5rem;
            }
        }
        .update-time {
            font-size: 0.9rem;
            color: var(--text-light);
            font-style: italic;
            margin-top: 2rem;
            text-align: right;
        }