:root {
            --primary-dark: #1a365d;
            --primary-accent: #e53e3e;
            --secondary-accent: #f6ad55;
            --bg-light: #f7fafc;
            --text-dark: #2d3748;
            --text-light: #718096;
            --border-color: #e2e8f0;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        body {
            background-color: var(--bg-light);
            color: var(--text-dark);
            line-height: 1.7;
            overflow-x: hidden;
        }
        a {
            color: var(--primary-accent);
            text-decoration: none;
            transition: color 0.3s ease;
        }
        a:hover {
            color: var(--primary-dark);
        }
        .container {
            width: 100%;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: linear-gradient(135deg, var(--primary-dark) 0%, #2d3748 100%);
            color: white;
            padding: 1.2rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            color: white;
            background: linear-gradient(90deg, var(--secondary-accent), #fed7d7);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            text-shadow: 0 2px 4px rgba(0,0,0,0.2);
        }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .main-nav a {
            color: #cbd5e0;
            font-weight: 600;
            padding: 0.5rem 0;
            position: relative;
        }
        .main-nav a:hover {
            color: white;
        }
        .main-nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--secondary-accent);
            transition: width 0.3s ease;
        }
        .main-nav a:hover::after {
            width: 100%;
        }
        .hamburger {
            display: none;
            font-size: 1.5rem;
            cursor: pointer;
            color: white;
        }
        .breadcrumb {
            padding: 1rem 0;
            background-color: #edf2f7;
            font-size: 0.9rem;
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
        }
        .breadcrumb li:not(:last-child)::after {
            content: '/';
            margin: 0 0.5rem;
            color: var(--text-light);
        }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
            margin: 2.5rem 0;
        }
        @media (max-width: 992px) {
            .main-content {
                grid-template-columns: 1fr;
            }
        }
        .article-content {
            background: white;
            border-radius: 12px;
            padding: 2.5rem;
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.05);
        }
        .article-header {
            margin-bottom: 2.5rem;
            padding-bottom: 1.5rem;
            border-bottom: 2px solid var(--border-color);
        }
        .article-header h1 {
            font-size: 2.8rem;
            line-height: 1.2;
            color: var(--primary-dark);
            margin-bottom: 1rem;
        }
        .meta-info {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 1rem;
            color: var(--text-light);
            font-size: 0.95rem;
        }
        .update-time {
            background: #fffaf0;
            padding: 0.4rem 0.8rem;
            border-radius: 20px;
            border-left: 4px solid var(--secondary-accent);
        }
        .featured-image {
            width: 100%;
            margin: 2rem 0;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 10px 25px rgba(0,0,0,0.1);
        }
        .featured-image img {
            width: 100%;
            height: auto;
            display: block;
            transition: transform 0.5s ease;
        }
        .featured-image:hover img {
            transform: scale(1.02);
        }
        .content-section {
            margin-bottom: 3rem;
        }
        h2 {
            font-size: 2rem;
            color: var(--primary-dark);
            margin: 2.5rem 0 1.5rem;
            padding-bottom: 0.7rem;
            border-bottom: 1px solid var(--border-color);
        }
        h3 {
            font-size: 1.6rem;
            color: #4a5568;
            margin: 2rem 0 1rem;
        }
        h4 {
            font-size: 1.3rem;
            color: #718096;
            margin: 1.5rem 0 0.8rem;
        }
        p {
            margin-bottom: 1.5rem;
            font-size: 1.1rem;
        }
        .highlight-box {
            background: linear-gradient(120deg, #e6fffa, #ebf8ff);
            border-left: 5px solid #38b2ac;
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 8px 8px 0;
        }
        .tip {
            background-color: #fefcbf;
            border-left: 5px solid #d69e2e;
            padding: 1rem;
            margin: 1.5rem 0;
            border-radius: 0 6px 6px 0;
        }
        .tip i {
            color: #b7791f;
            margin-right: 0.5rem;
        }
        ul, ol {
            margin-left: 1.8rem;
            margin-bottom: 1.5rem;
        }
        li {
            margin-bottom: 0.7rem;
        }
        strong {
            color: var(--primary-dark);
            font-weight: 700;
        }
        .sidebar {
            background: white;
            border-radius: 12px;
            padding: 2rem;
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.05);
            align-self: start;
        }
        .sidebar-widget {
            margin-bottom: 2.5rem;
        }
        .sidebar-widget h3 {
            font-size: 1.4rem;
            margin-bottom: 1.2rem;
            padding-bottom: 0.7rem;
            border-bottom: 2px solid var(--secondary-accent);
            color: var(--primary-dark);
        }
        .search-form {
            display: flex;
        }
        .search-form input {
            flex-grow: 1;
            padding: 0.9rem 1rem;
            border: 1px solid var(--border-color);
            border-radius: 8px 0 0 8px;
            font-size: 1rem;
        }
        .search-form button {
            background: var(--primary-accent);
            color: white;
            border: none;
            padding: 0 1.5rem;
            border-radius: 0 8px 8px 0;
            cursor: pointer;
            transition: background 0.3s;
        }
        .search-form button:hover {
            background: #c53030;
        }
        .rating-widget form {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }
        .star-rating {
            display: flex;
            justify-content: space-around;
            font-size: 1.8rem;
            color: #e2e8f0;
            cursor: pointer;
            margin-bottom: 1rem;
        }
        .star-rating .star {
            transition: color 0.2s;
        }
        .star-rating .star:hover,
        .star-rating .star.active {
            color: #f6ad55;
        }
        .rating-widget textarea,
        .comment-widget textarea {
            width: 100%;
            padding: 1rem;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            font-size: 1rem;
            resize: vertical;
            min-height: 120px;
            margin-bottom: 1rem;
        }
        .rating-widget button,
        .comment-widget button {
            background: var(--primary-dark);
            color: white;
            border: none;
            padding: 1rem 2rem;
            border-radius: 8px;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.3s;
        }
        .rating-widget button:hover,
        .comment-widget button:hover {
            background: #2d3748;
        }
        .link-list a {
            display: block;
            padding: 0.8rem 1rem;
            margin-bottom: 0.7rem;
            background: #f8f9fa;
            border-radius: 6px;
            border-left: 4px solid var(--primary-accent);
            transition: all 0.3s ease;
        }
        .link-list a:hover {
            background: #e9ecef;
            transform: translateX(5px);
        }
        .site-footer {
            background: var(--primary-dark);
            color: #cbd5e0;
            padding: 3rem 0 1.5rem;
            margin-top: 3rem;
        }
        .footer-container {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 2rem;
        }
        .footer-logo {
            font-size: 1.8rem;
            font-weight: 800;
            color: white;
            margin-bottom: 1rem;
        }
        .footer-section {
            flex: 1;
            min-width: 250px;
        }
        .footer-section h4 {
            color: white;
            margin-bottom: 1.5rem;
            font-size: 1.2rem;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 0.8rem;
        }
        .footer-links a {
            color: #a0aec0;
        }
        .footer-links a:hover {
            color: white;
        }
        friend-link {
            display: block;
            margin: 1rem 0;
            padding: 0.8rem;
            background: rgba(255,255,255,0.05);
            border-radius: 6px;
            color: #90cdf4;
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            margin-top: 2rem;
            border-top: 1px solid #4a5568;
            font-size: 0.9rem;
            color: #a0aec0;
            width: 100%;
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
            .main-nav ul {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background: var(--primary-dark);
                flex-direction: column;
                padding: 1rem;
                text-align: center;
                box-shadow: 0 5px 10px rgba(0,0,0,0.2);
            }
            .main-nav.active ul {
                display: flex;
            }
            .article-header h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.8rem;
            }
            h3 {
                font-size: 1.4rem;
            }
            .article-content {
                padding: 1.5rem;
            }
            .sidebar {
                padding: 1.5rem;
            }
        }