* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
            line-height: 1.7;
            color: #333;
            background: #f8f9fa;
            max-width: 120rem;
            margin: 0 auto;
            padding: 0 1rem;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .site-header {
            background: linear-gradient(135deg, #1a237e 0%, #4a148c 100%);
            color: white;
            padding: 1.5rem 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;
            max-width: 120rem;
            margin: 0 auto;
            padding: 0 2rem;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 800;
            text-decoration: none;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 0.75rem;
            transition: transform 0.3s ease;
        }
        .my-logo:hover {
            transform: scale(1.05);
        }
        .my-logo i {
            color: #00e5ff;
        }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 2.5rem;
        }
        .main-nav a {
            color: #e3f2fd;
            text-decoration: none;
            font-weight: 600;
            font-size: 1.1rem;
            padding: 0.5rem 0;
            position: relative;
            transition: color 0.3s;
        }
        .main-nav a:hover,
        .main-nav a:focus {
            color: #00e5ff;
        }
        .main-nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 3px;
            background: #00e5ff;
            transition: width 0.3s ease;
        }
        .main-nav a:hover::after {
            width: 100%;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 0.5rem;
        }
        .breadcrumb {
            padding: 1.2rem 2rem;
            background: #e8eaf6;
            font-size: 0.95rem;
            max-width: 120rem;
            margin: 0 auto;
        }
        .breadcrumb a {
            color: #5c6bc0;
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .content-wrapper {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
            margin-top: 2rem;
            max-width: 120rem;
            margin-left: auto;
            margin-right: auto;
        }
        main {
            background: white;
            padding: 3rem;
            border-radius: 16px;
            box-shadow: 0 6px 20px rgba(0,0,0,0.08);
        }
        article {
            max-width: 85ch;
        }
        h1 {
            font-size: 3.2rem;
            color: #1a237e;
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-bottom: 4px solid #00e5ff;
            padding-bottom: 0.5rem;
        }
        h2 {
            font-size: 2.4rem;
            color: #283593;
            margin: 3rem 0 1.5rem;
            padding-top: 1rem;
        }
        h3 {
            font-size: 1.8rem;
            color: #3949ab;
            margin: 2.5rem 0 1rem;
        }
        h4 {
            font-size: 1.4rem;
            color: #5c6bc0;
            margin: 2rem 0 0.8rem;
        }
        p {
            margin-bottom: 1.8rem;
            font-size: 1.125rem;
            text-align: justify;
        }
        .lead {
            font-size: 1.4rem;
            color: #555;
            font-weight: 500;
            margin-bottom: 2.5rem;
            padding: 1.5rem;
            background: #f3f4ff;
            border-left: 5px solid #3949ab;
            border-radius: 0 8px 8px 0;
        }
        .highlight {
            background: linear-gradient(120deg, #e1f5fe 0%, #e1f5fe 100%);
            padding: 0.2em 0.4em;
            border-radius: 4px;
            font-weight: 600;
        }
        strong {
            color: #1a237e;
        }
        em {
            color: #6a1b9a;
            font-style: italic;
        }
        .updated {
            font-size: 0.95rem;
            color: #777;
            text-align: right;
            margin-bottom: 2rem;
            padding-bottom: 1rem;
            border-bottom: 1px dashed #ccc;
        }
        a.content-link {
            color: #3949ab;
            text-decoration: underline wavy #bbdefb;
            font-weight: 600;
            transition: all 0.3s;
        }
        a.content-link:hover {
            color: #1a237e;
            background-color: #e8eaf6;
            text-decoration: underline wavy #3949ab;
        }
        .article-img {
            margin: 3rem auto;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 10px 25px rgba(0,0,0,0.15);
            max-width: 900px;
        }
        .article-img figcaption {
            text-align: center;
            font-style: italic;
            color: #666;
            padding: 1rem;
            background: #f5f5f5;
        }
        .feature-box {
            background: #f3f4ff;
            border-radius: 12px;
            padding: 2.5rem;
            margin: 3rem 0;
            border: 2px solid #c5cae9;
        }
        .feature-box h3 {
            margin-top: 0;
            color: #4527a0;
        }
        .search-form, .comment-form, .rating-form {
            display: flex;
            flex-direction: column;
            gap: 1.2rem;
        }
        .form-group {
            display: flex;
            flex-direction: column;
        }
        label {
            font-weight: 600;
            margin-bottom: 0.5rem;
            color: #444;
        }
        input, textarea, select {
            padding: 1rem;
            border: 2px solid #c5cae9;
            border-radius: 8px;
            font-size: 1rem;
            transition: border 0.3s;
        }
        input:focus, textarea:focus, select:focus {
            outline: none;
            border-color: #3949ab;
            box-shadow: 0 0 0 3px rgba(57, 73, 171, 0.2);
        }
        button {
            background: linear-gradient(135deg, #3949ab, #283593);
            color: white;
            border: none;
            padding: 1.2rem 2rem;
            border-radius: 8px;
            font-size: 1.1rem;
            font-weight: 700;
            cursor: pointer;
            transition: all 0.3s;
            align-self: flex-start;
        }
        button:hover {
            background: linear-gradient(135deg, #283593, #1a237e);
            transform: translateY(-3px);
            box-shadow: 0 7px 14px rgba(41, 53, 147, 0.3);
        }
        .stars {
            display: flex;
            gap: 0.5rem;
            font-size: 2rem;
            color: #ffc107;
            cursor: pointer;
            margin: 0.5rem 0;
        }
        aside {
            background: white;
            padding: 2rem;
            border-radius: 16px;
            box-shadow: 0 6px 20px rgba(0,0,0,0.08);
            align-self: start;
            position: sticky;
            top: 140px;
        }
        .sidebar-section {
            margin-bottom: 3rem;
        }
        .sidebar-section h3 {
            font-size: 1.4rem;
            color: #1a237e;
            margin-bottom: 1.2rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #00e5ff;
        }
        .quick-links ul {
            list-style: none;
        }
        .quick-links li {
            margin-bottom: 1rem;
        }
        .quick-links a {
            text-decoration: none;
            color: #5c6bc0;
            display: block;
            padding: 0.8rem 1rem;
            background: #f5f5ff;
            border-radius: 8px;
            transition: all 0.3s;
        }
        .quick-links a:hover {
            background: #3949ab;
            color: white;
            transform: translateX(5px);
        }
        footer {
            background: #1a237e;
            color: #e3f2fd;
            margin-top: 5rem;
            padding: 4rem 2rem 2rem;
            border-radius: 20px 20px 0 0;
        }
        .footer-container {
            max-width: 120rem;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 3rem;
        }
        .footer-logo {
            font-size: 2.2rem;
            font-weight: 800;
            margin-bottom: 1rem;
        }
        friend-link {
            display: block;
            margin: 1rem 0;
        }
        friend-link a {
            color: #bbdefb;
            text-decoration: none;
            font-size: 1.1rem;
        }
        friend-link a:hover {
            color: #00e5ff;
            text-decoration: underline;
        }
        .copyright {
            text-align: center;
            padding-top: 3rem;
            margin-top: 3rem;
            border-top: 1px solid #3949ab;
            color: #9fa8da;
            font-size: 0.95rem;
        }
        @media (max-width: 992px) {
            .content-wrapper {
                grid-template-columns: 1fr;
            }
            aside {
                position: static;
            }
            h1 {
                font-size: 2.6rem;
            }
            h2 {
                font-size: 2.1rem;
            }
        }
        @media (max-width: 768px) {
            .header-container {
                padding: 0 1rem;
            }
            .main-nav {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background: #1a237e;
                padding: 2rem;
                box-shadow: 0 10px 15px rgba(0,0,0,0.2);
            }
            .main-nav.active {
                display: block;
            }
            .main-nav ul {
                flex-direction: column;
                gap: 1.5rem;
            }
            .hamburger {
                display: block;
            }
            main {
                padding: 2rem;
            }
            .feature-box {
                padding: 1.8rem;
            }
        }