:root {
            --primary-color: #e53935;
            --secondary-color: #1e88e5;
            --dark-color: #212121;
            --light-color: #f5f5f5;
            --gray-color: #757575;
            --font-main: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: var(--font-main);
            line-height: 1.8;
            color: var(--dark-color);
            background-color: var(--light-color);
            overflow-x: hidden;
        }
        a {
            text-decoration: none;
            color: var(--secondary-color);
            transition: color 0.3s ease;
        }
        a:hover {
            color: var(--primary-color);
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background-color: var(--dark-color);
            color: white;
            padding: 1rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
        }
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 900;
            text-transform: uppercase;
            letter-spacing: 2px;
            color: var(--primary-color);
            text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
        }
        .my-logo:hover {
            color: #ff6f61;
        }
        nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        nav ul li a {
            color: white;
            font-weight: 600;
            padding: 0.5rem 1rem;
            border-radius: 4px;
        }
        nav ul li a:hover {
            background-color: var(--primary-color);
            color: white;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            cursor: pointer;
            color: white;
        }
        .breadcrumb {
            padding: 1rem 0;
            background-color: #eeeeee;
            font-size: 0.9rem;
        }
        .breadcrumb a {
            color: var(--gray-color);
        }
        .breadcrumb a:hover {
            color: var(--primary-color);
        }
        main {
            padding: 2rem 0;
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2rem;
        }
        .article-content {
            background: white;
            padding: 2.5rem;
            border-radius: 12px;
            box-shadow: 0 6px 20px rgba(0,0,0,0.08);
        }
        h1 {
            font-size: 3rem;
            color: var(--primary-color);
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-left: 6px solid var(--secondary-color);
            padding-left: 1rem;
        }
        h2 {
            font-size: 2.2rem;
            color: var(--dark-color);
            margin: 2.5rem 0 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 3px solid var(--secondary-color);
        }
        h3 {
            font-size: 1.8rem;
            color: var(--secondary-color);
            margin: 2rem 0 1rem;
        }
        h4 {
            font-size: 1.4rem;
            color: var(--gray-color);
            margin: 1.5rem 0 0.8rem;
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
            font-size: 1.1rem;
        }
        .highlight {
            background-color: #fff9c4;
            padding: 1rem;
            border-left: 5px solid #ffd600;
            margin: 1.5rem 0;
            font-weight: bold;
        }
        .emoji {
            font-size: 1.2rem;
            margin-right: 0.5rem;
        }
        img {
            max-width: 100%;
            height: auto;
            border-radius: 10px;
            margin: 1.5rem 0;
            box-shadow: 0 8px 16px rgba(0,0,0,0.1);
            transition: transform 0.3s ease;
        }
        img:hover {
            transform: scale(1.02);
        }
        .link-list {
            background-color: #e3f2fd;
            padding: 1.5rem;
            border-radius: 8px;
            margin: 2rem 0;
        }
        .link-list ul {
            list-style: none;
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 1rem;
        }
        .link-list li a {
            display: block;
            padding: 0.8rem;
            background: white;
            border-radius: 6px;
            border: 1px solid #bbdefb;
        }
        .link-list li a:hover {
            background: var(--secondary-color);
            color: white;
        }
        .sidebar {
            background: white;
            padding: 1.5rem;
            border-radius: 12px;
            box-shadow: 0 6px 20px rgba(0,0,0,0.08);
            height: fit-content;
        }
        .sidebar h3 {
            color: var(--primary-color);
            margin-top: 0;
        }
        .search-box, .comment-box, .rating-box {
            margin-bottom: 2rem;
        }
        .search-box input, .comment-box textarea, .rating-box select, .comment-box input, .rating-box input {
            width: 100%;
            padding: 0.8rem;
            margin: 0.5rem 0;
            border: 1px solid #ccc;
            border-radius: 6px;
            font-family: inherit;
        }
        .search-box button, .comment-box button, .rating-box button {
            background-color: var(--secondary-color);
            color: white;
            border: none;
            padding: 0.8rem 1.5rem;
            border-radius: 6px;
            cursor: pointer;
            font-weight: bold;
            width: 100%;
            transition: background-color 0.3s ease;
        }
        .search-box button:hover, .comment-box button:hover, .rating-box button:hover {
            background-color: var(--primary-color);
        }
        .stars {
            display: flex;
            gap: 0.5rem;
            margin: 0.5rem 0;
            font-size: 1.5rem;
            color: #ffc107;
        }
        .update-time {
            font-size: 0.9rem;
            color: var(--gray-color);
            text-align: right;
            margin-top: 2rem;
            font-style: italic;
        }
        footer {
            background-color: var(--dark-color);
            color: white;
            padding: 3rem 0 1.5rem;
            margin-top: 3rem;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-section h4 {
            color: var(--primary-color);
            margin-bottom: 1rem;
            font-size: 1.3rem;
        }
        .friend-link {
            display: inline-block;
            background: #37474f;
            color: white;
            padding: 0.6rem 1.2rem;
            border-radius: 6px;
            margin: 0.3rem;
            transition: background 0.3s ease;
        }
        .friend-link:hover {
            background: var(--primary-color);
            color: white;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #546e7a;
            font-size: 0.9rem;
            color: #b0bec5;
        }
        @media (max-width: 992px) {
            main {
                grid-template-columns: 1fr;
            }
            h1 {
                font-size: 2.5rem;
            }
            h2 {
                font-size: 2rem;
            }
        }
        @media (max-width: 768px) {
            nav ul {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background-color: var(--dark-color);
                padding: 1rem;
                box-shadow: 0 8px 16px rgba(0,0,0,0.2);
            }
            nav ul.active {
                display: flex;
            }
            .hamburger {
                display: block;
            }
            .header-content {
                flex-wrap: wrap;
            }
            .article-content {
                padding: 1.5rem;
            }
            .link-list ul {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 480px) {
            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.6rem;
            }
            .my-logo {
                font-size: 1.8rem;
            }
        }