* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: #333;
            background: linear-gradient(135deg, #f5f7fa 0%, #e4e8f0 100%);
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 15px;
        }
        h1, h2, h3, h4 {
            font-family: 'Trebuchet MS', sans-serif;
            color: #2c3e50;
            margin-bottom: 1rem;
            line-height: 1.3;
        }
        h1 {
            font-size: 2.8rem;
            text-align: center;
            margin: 2rem 0;
            color: #1a5276;
            text-shadow: 1px 1px 3px rgba(0,0,0,0.1);
        }
        h2 {
            font-size: 2.2rem;
            border-bottom: 3px solid #3498db;
            padding-bottom: 0.5rem;
            margin-top: 2.5rem;
        }
        h3 {
            font-size: 1.8rem;
            color: #2980b9;
            margin-top: 2rem;
        }
        h4 {
            font-size: 1.4rem;
            color: #16a085;
            margin-top: 1.5rem;
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
            font-size: 1.15rem;
        }
        a {
            color: #2980b9;
            text-decoration: none;
            transition: color 0.3s ease, border-bottom 0.3s ease;
            border-bottom: 1px dotted transparent;
        }
        a:hover {
            color: #e74c3c;
            border-bottom: 1px dotted #e74c3c;
        }
        strong {
            color: #2c3e50;
            font-weight: 700;
        }
        em {
            color: #7d3c98;
            font-style: italic;
        }
        .container {
            display: grid;
            grid-template-columns: 1fr;
            grid-template-areas:
                "header"
                "breadcrumb"
                "main"
                "sidebar"
                "footer";
            gap: 2rem;
        }
        @media (min-width: 992px) {
            .container {
                grid-template-columns: 3fr 1fr;
                grid-template-areas:
                    "header header"
                    "breadcrumb breadcrumb"
                    "main sidebar"
                    "footer footer";
            }
        }
        header {
            grid-area: header;
            background: linear-gradient(90deg, #1a5276, #2e86c1);
            color: white;
            padding: 1.5rem;
            border-radius: 0 0 15px 15px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
            display: flex;
            flex-direction: column;
            align-items: center;
        }
        .header-top {
            width: 100%;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }
        .my-logo {
            font-family: 'Impact', fantasy;
            font-size: 2.5rem;
            color: #f1c40f;
            text-decoration: none;
            border: none !important;
            text-shadow: 2px 2px 0 #e74c3c;
            letter-spacing: 1px;
        }
        .my-logo:hover {
            color: #f39c12;
            text-shadow: 2px 2px 0 #c0392b;
        }
        .hamburger {
            display: block;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
        }
        @media (min-width: 768px) {
            .hamburger {
                display: none;
            }
        }
        nav {
            width: 100%;
            margin-top: 1rem;
            transition: all 0.5s ease;
        }
        @media (max-width: 767px) {
            nav.collapsed {
                display: none;
            }
        }
        .nav-menu {
            display: flex;
            flex-direction: column;
            list-style: none;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 10px;
            padding: 1rem;
        }
        @media (min-width: 768px) {
            .nav-menu {
                flex-direction: row;
                justify-content: center;
                flex-wrap: wrap;
                gap: 1.5rem;
            }
        }
        .nav-menu li a {
            color: white;
            padding: 0.5rem 1rem;
            border-radius: 5px;
            font-weight: 600;
            display: block;
            border: none;
        }
        .nav-menu li a:hover {
            background-color: rgba(241, 196, 15, 0.8);
            color: #1a5276;
            transform: translateY(-2px);
        }
        .breadcrumb {
            grid-area: breadcrumb;
            padding: 1rem;
            background-color: #ecf0f1;
            border-radius: 8px;
            font-size: 0.95rem;
        }
        .breadcrumb a {
            color: #7f8c8d;
        }
        .breadcrumb a:hover {
            color: #3498db;
        }
        main {
            grid-area: main;
            background-color: white;
            padding: 2.5rem;
            border-radius: 15px;
            box-shadow: 0 5px 20px rgba(0,0,0,0.08);
        }
        article {
            counter-reset: section;
        }
        article h2::before {
            counter-increment: section;
            content: counter(section) ". ";
            color: #e74c3c;
            font-weight: bold;
        }
        aside {
            grid-area: sidebar;
            background-color: #f8f9fa;
            padding: 1.5rem;
            border-radius: 15px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            align-self: start;
        }
        .widget {
            margin-bottom: 2rem;
        }
        .widget h3 {
            font-size: 1.5rem;
            border-bottom: 2px solid #3498db;
            padding-bottom: 0.5rem;
            margin-bottom: 1rem;
        }
        form {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }
        input, textarea, select {
            padding: 0.8rem;
            border: 1px solid #bdc3c7;
            border-radius: 8px;
            font-size: 1rem;
            transition: border 0.3s ease;
        }
        input:focus, textarea:focus, select:focus {
            outline: none;
            border-color: #3498db;
            box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.2);
        }
        button, .btn {
            background: linear-gradient(to right, #3498db, #2980b9);
            color: white;
            border: none;
            padding: 0.9rem 1.5rem;
            border-radius: 8px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            text-align: center;
            display: inline-block;
        }
        button:hover, .btn:hover {
            background: linear-gradient(to right, #2980b9, #1a5276);
            transform: translateY(-3px);
            box-shadow: 0 7px 14px rgba(52, 152, 219, 0.3);
        }
        .rating {
            display: flex;
            gap: 0.5rem;
            margin: 1rem 0;
            flex-wrap: wrap;
        }
        .rating input {
            display: none;
        }
        .rating label {
            font-size: 1.8rem;
            color: #ddd;
            cursor: pointer;
            transition: color 0.2s;
        }
        .rating label:hover,
        .rating label:hover ~ label,
        .rating input:checked ~ label {
            color: #f1c40f;
        }
        .featured-img {
            width: 100%;
            max-height: 500px;
            object-fit: cover;
            border-radius: 12px;
            margin: 2rem 0;
            border: 5px solid #ecf0f1;
            box-shadow: 0 10px 20px rgba(0,0,0,0.1);
            transition: transform 0.5s ease;
        }
        .featured-img:hover {
            transform: scale(1.01);
        }
        .data-table {
            width: 100%;
            border-collapse: collapse;
            margin: 2rem 0;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        .data-table th, .data-table td {
            border: 1px solid #bdc3c7;
            padding: 1rem;
            text-align: left;
        }
        .data-table th {
            background-color: #2c3e50;
            color: white;
            font-weight: 600;
        }
        .data-table tr:nth-child(even) {
            background-color: #f8f9fa;
        }
        .data-table tr:hover {
            background-color: #e8f4fc;
        }
        footer {
            grid-area: footer;
            background: linear-gradient(90deg, #2c3e50, #34495e);
            color: #ecf0f1;
            padding: 2.5rem 1.5rem;
            border-radius: 15px 15px 0 0;
            text-align: center;
        }
        .footer-links {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-links a {
            color: #bdc3c7;
            border: none;
        }
        .footer-links a:hover {
            color: #f1c40f;
        }
        friend-link {
            display: block;
            margin: 1rem 0;
            font-style: italic;
            color: #7f8c8d;
        }
        friend-link a {
            color: #3498db;
        }
        .copyright {
            border-top: 1px solid #7f8c8d;
            padding-top: 1.5rem;
            margin-top: 1.5rem;
            font-size: 0.9rem;
            color: #95a5a6;
        }
        .highlight {
            background-color: #fffacd;
            padding: 1.5rem;
            border-left: 5px solid #f1c40f;
            border-radius: 0 8px 8px 0;
            margin: 1.5rem 0;
        }
        .update-time {
            font-size: 0.9rem;
            color: #7f8c8d;
            text-align: right;
            margin-bottom: 2rem;
            font-style: italic;
        }
        .tag {
            display: inline-block;
            background-color: #e8f4fc;
            color: #2980b9;
            padding: 0.3rem 0.8rem;
            border-radius: 20px;
            font-size: 0.85rem;
            margin: 0.2rem;
        }
        .content-link-list {
            columns: 2;
            column-gap: 2rem;
            margin: 2rem 0;
            padding: 1rem;
            background-color: #f8f9fa;
            border-radius: 10px;
        }
        @media (max-width: 768px) {
            .content-link-list {
                columns: 1;
            }
        }