:root {
            --primary-color: #1a73e8;
            --secondary-color: #34a853;
            --accent-color: #ea4335;
            --dark-color: #202124;
            --light-color: #f8f9fa;
            --gray-color: #dadce0;
            --text-color: #3c4043;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
            --radius: 8px;
            --transition: all 0.3s ease;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
            line-height: 1.6;
            color: var(--text-color);
            background-color: #fff;
            overflow-x: hidden;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        a {
            color: var(--primary-color);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--accent-color);
        }
        ul {
            list-style: none;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .btn {
            display: inline-block;
            padding: 12px 24px;
            background-color: var(--primary-color);
            color: white;
            border: none;
            border-radius: var(--radius);
            cursor: pointer;
            font-weight: 600;
            transition: var(--transition);
        }
        .btn:hover {
            background-color: #0d5bb5;
            transform: translateY(-2px);
            box-shadow: var(--shadow);
        }
        .section {
            padding: 60px 0;
        }
        .text-center {
            text-align: center;
        }
        .site-header {
            background-color: var(--dark-color);
            color: white;
            padding: 15px 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-size: 28px;
            font-weight: 800;
            color: white;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo i {
            color: var(--secondary-color);
        }
        .my-logo:hover {
            color: var(--light-color);
        }
        .main-nav ul {
            display: flex;
            gap: 30px;
        }
        .main-nav a {
            color: white;
            font-weight: 500;
        }
        .main-nav a:hover {
            color: var(--secondary-color);
        }
        .hamburger {
            display: none;
            font-size: 24px;
            background: none;
            border: none;
            color: white;
            cursor: pointer;
        }
        .breadcrumb {
            background-color: var(--light-color);
            padding: 15px 0;
            font-size: 14px;
            margin-bottom: 30px;
        }
        .breadcrumb ol {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        .breadcrumb li:not(:last-child)::after {
            content: '/';
            margin-left: 10px;
            color: var(--gray-color);
        }
        .hero {
            background: linear-gradient(135deg, #0d5bb5 0%, #1a73e8 100%);
            color: white;
            padding: 80px 0;
            border-radius: 0 0 var(--radius) var(--radius);
            margin-bottom: 40px;
        }
        .hero h1 {
            font-size: 3.5rem;
            margin-bottom: 20px;
            line-height: 1.2;
        }
        .hero p {
            font-size: 1.2rem;
            max-width: 800px;
            margin: 0 auto 30px;
            opacity: 0.9;
        }
        .search-box {
            background-color: white;
            padding: 30px;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            margin-bottom: 40px;
        }
        .search-box form {
            display: flex;
            max-width: 600px;
            margin: 0 auto;
        }
        .search-box input {
            flex: 1;
            padding: 15px;
            border: 2px solid var(--gray-color);
            border-radius: var(--radius) 0 0 var(--radius);
            font-size: 16px;
        }
        .search-box button {
            background-color: var(--primary-color);
            color: white;
            border: none;
            padding: 0 25px;
            border-radius: 0 var(--radius) var(--radius) 0;
            cursor: pointer;
            font-size: 16px;
        }
        .search-box button:hover {
            background-color: #0d5bb5;
        }
        .content-area {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
        }
        @media (max-width: 992px) {
            .content-area {
                grid-template-columns: 1fr;
            }
        }
        .main-content h1 {
            font-size: 2.8rem;
            margin-bottom: 20px;
            color: var(--dark-color);
        }
        .main-content h2 {
            font-size: 2.2rem;
            margin: 40px 0 20px;
            color: var(--primary-color);
            padding-bottom: 10px;
            border-bottom: 3px solid var(--secondary-color);
        }
        .main-content h3 {
            font-size: 1.8rem;
            margin: 30px 0 15px;
            color: var(--dark-color);
        }
        .main-content h4 {
            font-size: 1.4rem;
            margin: 25px 0 10px;
            color: var(--text-color);
        }
        .main-content p {
            margin-bottom: 20px;
            font-size: 18px;
            line-height: 1.8;
        }
        .main-content strong {
            color: var(--primary-color);
            font-weight: 700;
        }
        .main-content em {
            color: var(--secondary-color);
            font-style: italic;
        }
        .main-content ul, .main-content ol {
            margin-left: 20px;
            margin-bottom: 20px;
        }
        .main-content li {
            margin-bottom: 10px;
            font-size: 18px;
        }
        .featured-image {
            margin: 40px 0;
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
        }
        .featured-image figcaption {
            text-align: center;
            padding: 10px;
            background-color: var(--light-color);
            font-style: italic;
        }
        .highlight-box {
            background-color: #e8f0fe;
            border-left: 5px solid var(--primary-color);
            padding: 25px;
            margin: 30px 0;
            border-radius: 0 var(--radius) var(--radius) 0;
        }
        .sidebar {
            background-color: var(--light-color);
            padding: 30px;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            align-self: start;
            position: sticky;
            top: 100px;
        }
        .sidebar h3 {
            color: var(--primary-color);
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--gray-color);
        }
        .related-links li {
            margin-bottom: 15px;
            padding-bottom: 15px;
            border-bottom: 1px dashed var(--gray-color);
        }
        .related-links a {
            display: block;
            font-weight: 500;
        }
        .related-links a:hover {
            padding-left: 5px;
        }
        .comments-section, .rating-section {
            background-color: var(--light-color);
            padding: 40px;
            border-radius: var(--radius);
            margin-top: 40px;
            box-shadow: var(--shadow);
        }
        .comments-section h2, .rating-section h2 {
            color: var(--primary-color);
            margin-bottom: 25px;
        }
        .rating-stars {
            display: flex;
            gap: 10px;
            margin-bottom: 20px;
        }
        .star {
            font-size: 28px;
            color: var(--gray-color);
            cursor: pointer;
            transition: var(--transition);
        }
        .star:hover,
        .star.active {
            color: #ffc107;
        }
        .rating-form, .comment-form {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }
        .form-group {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .form-group label {
            font-weight: 600;
        }
        .form-group input,
        .form-group textarea {
            padding: 15px;
            border: 2px solid var(--gray-color);
            border-radius: var(--radius);
            font-size: 16px;
            font-family: inherit;
        }
        .form-group textarea {
            min-height: 150px;
            resize: vertical;
        }
        .site-footer {
            background-color: var(--dark-color);
            color: white;
            padding: 60px 0 30px;
            margin-top: 60px;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-logo {
            font-size: 24px;
            font-weight: 700;
            margin-bottom: 20px;
            color: white;
        }
        .footer-links h4 {
            color: var(--secondary-color);
            margin-bottom: 20px;
        }
        .footer-links li {
            margin-bottom: 10px;
        }
        .footer-links a {
            color: var(--gray-color);
        }
        .footer-links a:hover {
            color: white;
        }
        friend-link {
            display: block;
            background-color: rgba(255,255,255,0.05);
            padding: 15px;
            border-radius: var(--radius);
            margin-bottom: 10px;
            text-align: center;
        }
        .copyright {
            text-align: center;
            padding-top: 30px;
            border-top: 1px solid rgba(255,255,255,0.1);
            color: var(--gray-color);
            font-size: 14px;
        }
        .update-time {
            color: var(--secondary-color);
            font-weight: 600;
            margin-top: 10px;
        }
        @media (max-width: 768px) {
            .hero h1 {
                font-size: 2.5rem;
            }
            .main-content h1 {
                font-size: 2.2rem;
            }
            .main-content h2 {
                font-size: 1.8rem;
            }
            .main-content h3 {
                font-size: 1.5rem;
            }
            .main-nav ul {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background-color: var(--dark-color);
                flex-direction: column;
                padding: 20px;
                text-align: center;
                box-shadow: 0 10px 15px rgba(0,0,0,0.1);
            }
            .main-nav.active ul {
                display: flex;
            }
            .hamburger {
                display: block;
            }
            .search-box form {
                flex-direction: column;
            }
            .search-box input,
            .search-box button {
                width: 100%;
                border-radius: var(--radius);
                margin-bottom: 10px;
            }
        }