:root {
            --primary-color: #0a4a8c;
            --secondary-color: #d32f2f;
            --accent-color: #ffc107;
            --dark-bg: #1a1a2e;
            --light-bg: #f8f9fa;
            --text-dark: #212529;
            --text-light: #e9ecef;
            --spacing-unit: 1rem;
            --border-radius: 8px;
            --box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            --transition: all 0.3s ease;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: var(--text-dark);
            background-color: var(--light-bg);
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }
        a {
            color: var(--primary-color);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--secondary-color);
            text-decoration: underline;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 var(--spacing-unit);
        }
        .site-header {
            background-color: var(--dark-bg);
            color: var(--text-light);
            padding: 1rem 0;
            box-shadow: var(--box-shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            background: linear-gradient(90deg, var(--accent-color), #fff);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            text-transform: uppercase;
            letter-spacing: 1px;
        }
        .my-logo a {
            color: inherit;
            text-decoration: none;
        }
        .main-nav ul {
            display: flex;
            list-style: none;
        }
        .main-nav li {
            margin-left: 1.5rem;
        }
        .main-nav a {
            color: var(--text-light);
            font-weight: 600;
            padding: 0.5rem 0;
            position: relative;
        }
        .main-nav a:hover {
            color: var(--accent-color);
            text-decoration: none;
        }
        .main-nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--accent-color);
            transition: width 0.3s ease;
        }
        .main-nav a:hover::after {
            width: 100%;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: var(--text-light);
            font-size: 1.5rem;
            cursor: pointer;
        }
        .breadcrumb {
            background-color: #e9ecef;
            padding: 0.75rem 0;
            font-size: 0.9rem;
            margin-bottom: 2rem;
        }
        .breadcrumb a {
            color: var(--primary-color);
        }
        .breadcrumb span {
            color: #6c757d;
        }
        .content-wrapper {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2rem;
            padding: 2rem 0;
            flex: 1;
        }
        @media (max-width: 992px) {
            .content-wrapper {
                grid-template-columns: 1fr;
            }
        }
        article {
            background-color: #fff;
            padding: 2rem;
            border-radius: var(--border-radius);
            box-shadow: var(--box-shadow);
        }
        article h1 {
            color: var(--primary-color);
            font-size: 2.5rem;
            margin-bottom: 1rem;
            border-bottom: 3px solid var(--accent-color);
            padding-bottom: 0.5rem;
        }
        article h2 {
            color: var(--secondary-color);
            font-size: 1.8rem;
            margin: 2rem 0 1rem;
            padding-top: 1rem;
            border-top: 1px solid #dee2e6;
        }
        article h3 {
            color: var(--primary-color);
            font-size: 1.4rem;
            margin: 1.5rem 0 0.75rem;
        }
        article h4 {
            color: #495057;
            font-size: 1.1rem;
            margin: 1.25rem 0 0.5rem;
        }
        article p {
            margin-bottom: 1.25rem;
            text-align: justify;
        }
        article emoji {
            font-size: 1.2em;
            margin-right: 0.3rem;
        }
        article strong {
            color: var(--secondary-color);
            font-weight: 700;
        }
        article img {
            max-width: 100%;
            height: auto;
            border-radius: var(--border-radius);
            box-shadow: var(--box-shadow);
            margin: 1.5rem auto;
            display: block;
        }
        .image-caption {
            text-align: center;
            font-style: italic;
            color: #6c757d;
            margin-top: -1rem;
            margin-bottom: 1.5rem;
            font-size: 0.9rem;
        }
        .update-time {
            background-color: #fff3cd;
            border-left: 4px solid var(--accent-color);
            padding: 0.75rem;
            margin-bottom: 2rem;
            font-size: 0.9rem;
            color: #856404;
        }
        aside {
            background-color: #fff;
            padding: 1.5rem;
            border-radius: var(--border-radius);
            box-shadow: var(--box-shadow);
            align-self: start;
            position: sticky;
            top: 120px;
        }
        aside h3 {
            color: var(--primary-color);
            margin-bottom: 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--accent-color);
        }
        .form-group {
            margin-bottom: 1rem;
        }
        .form-group label {
            display: block;
            margin-bottom: 0.3rem;
            font-weight: 600;
        }
        .form-control {
            width: 100%;
            padding: 0.75rem;
            border: 1px solid #ced4da;
            border-radius: var(--border-radius);
            font-size: 1rem;
            transition: var(--transition);
        }
        .form-control:focus {
            border-color: var(--primary-color);
            outline: none;
            box-shadow: 0 0 0 0.2rem rgba(10, 74, 140, 0.25);
        }
        .btn {
            background-color: var(--primary-color);
            color: white;
            border: none;
            padding: 0.75rem 1.5rem;
            border-radius: var(--border-radius);
            cursor: pointer;
            font-weight: 600;
            transition: var(--transition);
        }
        .btn:hover {
            background-color: var(--secondary-color);
            text-decoration: none;
        }
        .rating {
            display: flex;
            gap: 0.5rem;
            margin: 0.5rem 0;
        }
        .rating input {
            display: none;
        }
        .rating label {
            font-size: 1.5rem;
            color: #ddd;
            cursor: pointer;
        }
        .rating input:checked ~ label {
            color: #ddd;
        }
        .rating label:hover,
        .rating label:hover ~ label {
            color: var(--accent-color);
        }
        .rating input:checked + label,
        .rating input:checked + label ~ label {
            color: var(--accent-color);
        }
        .site-footer {
            background-color: var(--dark-bg);
            color: var(--text-light);
            padding: 2rem 0;
            margin-top: auto;
        }
        .footer-content {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 2rem;
        }
        .footer-section {
            flex: 1;
            min-width: 250px;
        }
        .footer-section h4 {
            color: var(--accent-color);
            margin-bottom: 1rem;
        }
        friend-link {
            display: block;
            margin-bottom: 0.5rem;
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            margin-top: 2rem;
            border-top: 1px solid #495057;
            font-size: 0.9rem;
            color: #adb5bd;
        }
        @media (max-width: 768px) {
            .header-content {
                flex-wrap: wrap;
            }
            .hamburger {
                display: block;
            }
            .main-nav {
                width: 100%;
                max-height: 0;
                overflow: hidden;
                transition: max-height 0.5s ease;
            }
            .main-nav.active {
                max-height: 300px;
                margin-top: 1rem;
            }
            .main-nav ul {
                flex-direction: column;
            }
            .main-nav li {
                margin: 0;
                border-bottom: 1px solid #495057;
            }
            .main-nav a {
                display: block;
                padding: 0.75rem 0;
            }
            article h1 {
                font-size: 2rem;
            }
            article h2 {
                font-size: 1.6rem;
            }
        }