* { margin: 0; padding: 0; box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            color: #333;
            background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
            padding: 0;
            margin: 0;
        }
        a { color: #1a73e8; text-decoration: none; transition: color 0.3s ease; }
        a:hover { color: #0d47a1; text-decoration: underline; }
        img { max-width: 100%; height: auto; display: block; }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: linear-gradient(90deg, #1a237e 0%, #283593 50%, #3949ab 100%);
            color: white;
            padding: 15px 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;
        }
        .logo a {
            font-size: 2.2rem;
            font-weight: 800;
            color: #ffd54f;
            text-decoration: none;
            font-family: 'Georgia', serif;
            letter-spacing: 1px;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
        }
        .logo a:hover { color: #ffca28; text-decoration: none; }
        .nav-main { display: flex; align-items: center; }
        .nav-links {
            display: flex;
            list-style: none;
        }
        .nav-links li { margin-left: 25px; }
        .nav-links a {
            color: #e3f2fd;
            font-weight: 600;
            font-size: 1.1rem;
            padding: 8px 12px;
            border-radius: 5px;
        }
        .nav-links a:hover {
            background: rgba(255, 255, 255, 0.15);
            text-decoration: none;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            cursor: pointer;
            color: #ffd54f;
        }
        .breadcrumb {
            background: #e8eaf6;
            padding: 10px 0;
            font-size: 0.95rem;
            margin-bottom: 20px;
        }
        .breadcrumb a { color: #5c6bc0; }
        .breadcrumb a:hover { color: #1a237e; }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 30px;
            margin: 30px 0;
        }
        .article-area {
            background: white;
            padding: 30px;
            border-radius: 12px;
            box-shadow: 0 6px 20px rgba(0,0,0,0.08);
        }
        .sidebar {
            background: white;
            padding: 25px;
            border-radius: 12px;
            box-shadow: 0 6px 20px rgba(0,0,0,0.08);
            align-self: start;
        }
        h1 {
            font-size: 2.8rem;
            color: #1a237e;
            margin-bottom: 20px;
            border-bottom: 3px solid #ffd54f;
            padding-bottom: 10px;
        }
        h2 {
            font-size: 2.2rem;
            color: #283593;
            margin: 30px 0 15px;
            padding-left: 10px;
            border-left: 5px solid #5c6bc0;
        }
        h3 {
            font-size: 1.8rem;
            color: #3949ab;
            margin: 25px 0 12px;
        }
        h4 {
            font-size: 1.4rem;
            color: #7986cb;
            margin: 20px 0 10px;
        }
        p {
            margin-bottom: 18px;
            text-align: justify;
            font-size: 1.1rem;
        }
        .highlight {
            background: #fff9c4;
            padding: 15px;
            border-left: 4px solid #ffd54f;
            margin: 20px 0;
            border-radius: 0 8px 8px 0;
        }
        .article-img {
            margin: 25px auto;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 8px 16px rgba(0,0,0,0.1);
            max-width: 800px;
        }
        .article-img img {
            width: 100%;
            height: auto;
            transition: transform 0.5s ease;
        }
        .article-img img:hover {
            transform: scale(1.02);
        }
        .update-time {
            font-style: italic;
            color: #666;
            text-align: right;
            margin-top: 30px;
            padding-top: 15px;
            border-top: 1px dashed #ccc;
        }
        .search-box, .comment-form, .rating-form {
            background: #f3f4f6;
            padding: 20px;
            border-radius: 10px;
            margin-bottom: 25px;
        }
        .search-box h3, .comment-form h3, .rating-form h3 {
            margin-top: 0;
            color: #1a237e;
        }
        input, textarea, select {
            width: 100%;
            padding: 12px;
            margin: 10px 0;
            border: 2px solid #c5cae9;
            border-radius: 6px;
            font-size: 1rem;
            transition: border 0.3s ease;
        }
        input:focus, textarea:focus, select:focus {
            border-color: #5c6bc0;
            outline: none;
        }
        button {
            background: linear-gradient(90deg, #1a237e 0%, #3949ab 100%);
            color: white;
            border: none;
            padding: 12px 24px;
            border-radius: 6px;
            cursor: pointer;
            font-size: 1rem;
            font-weight: 600;
            transition: background 0.3s ease, transform 0.2s ease;
        }
        button:hover {
            background: linear-gradient(90deg, #0d1b6e 0%, #283593 100%);
            transform: translateY(-2px);
        }
        .site-footer {
            background: #1a237e;
            color: #e8eaf6;
            padding: 40px 0 20px;
            margin-top: 50px;
        }
        .footer-content {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 30px;
        }
        .footer-section {
            flex: 1;
            min-width: 250px;
        }
        .footer-section h3 {
            color: #ffd54f;
            margin-bottom: 20px;
            font-size: 1.5rem;
        }
        friend-link {
            display: block;
            margin: 8px 0;
            color: #bbdefb;
        }
        friend-link:hover {
            color: #ffd54f;
            text-decoration: underline;
        }
        .copyright {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid #3949ab;
            margin-top: 30px;
            font-size: 0.9rem;
            color: #9fa8da;
        }
        @media (max-width: 992px) {
            .main-content {
                grid-template-columns: 1fr;
            }
            .nav-links {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background: #283593;
                padding: 20px;
                box-shadow: 0 10px 20px rgba(0,0,0,0.2);
            }
            .nav-links.active {
                display: flex;
            }
            .nav-links li {
                margin: 10px 0;
                text-align: center;
            }
            .hamburger {
                display: block;
            }
            h1 { font-size: 2.4rem; }
            h2 { font-size: 2rem; }
        }
        @media (max-width: 576px) {
            .header-content {
                flex-direction: column;
                align-items: flex-start;
            }
            .logo { margin-bottom: 10px; }
            .nav-main { width: 100%; justify-content: space-between; }
            .article-area, .sidebar { padding: 20px; }
            h1 { font-size: 2rem; }
            h2 { font-size: 1.8rem; }
        }