* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.8;
            color: #333;
            background: linear-gradient(135deg, #f5f7fa 0%, #e4e8f0 100%);
            min-height: 100vh;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: #2c3e50;
            color: white;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-top {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 0;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            color: #f39c12;
            text-transform: uppercase;
            letter-spacing: 1px;
        }
        .my-logo a {
            color: inherit;
            text-decoration: none;
            transition: color 0.3s;
        }
        .my-logo a:hover {
            color: #ffd700;
        }
        .nav-desktop {
            display: flex;
            list-style: none;
            gap: 25px;
        }
        .nav-desktop a {
            color: white;
            text-decoration: none;
            font-weight: 600;
            padding: 8px 15px;
            border-radius: 5px;
            transition: all 0.3s;
            position: relative;
        }
        .nav-desktop a:hover {
            background: #3498db;
            transform: translateY(-2px);
        }
        .nav-desktop a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            width: 0;
            height: 2px;
            background: #f39c12;
            transition: all 0.3s;
        }
        .nav-desktop a:hover::after {
            width: 80%;
            left: 10%;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            cursor: pointer;
            color: white;
        }
        .nav-mobile {
            display: none;
            flex-direction: column;
            list-style: none;
            background: #34495e;
            position: absolute;
            top: 100%;
            left: 0;
            width: 100%;
            padding: 15px 0;
            border-top: 2px solid #f39c12;
            box-shadow: 0 5px 15px rgba(0,0,0,0.2);
        }
        .nav-mobile.active {
            display: flex;
        }
        .nav-mobile a {
            color: white;
            text-decoration: none;
            padding: 15px 25px;
            border-bottom: 1px solid #3d566e;
            transition: background 0.3s;
            font-weight: 600;
        }
        .nav-mobile a:hover {
            background: #3498db;
        }
        .breadcrumb {
            background: #ecf0f1;
            padding: 12px 0;
            border-bottom: 1px solid #bdc3c7;
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
        }
        .breadcrumb li {
            margin-right: 10px;
            font-size: 0.95rem;
        }
        .breadcrumb li:not(:last-child)::after {
            content: '›';
            margin-left: 10px;
            color: #7f8c8d;
        }
        .breadcrumb a {
            color: #3498db;
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        main {
            padding: 40px 0;
        }
        article {
            background: white;
            border-radius: 15px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.08);
            padding: 40px;
            margin-bottom: 30px;
        }
        .last-updated {
            text-align: right;
            font-size: 0.9rem;
            color: #7f8c8d;
            margin-bottom: 25px;
            padding-bottom: 15px;
            border-bottom: 1px dashed #ddd;
        }
        h1 {
            font-size: 2.8rem;
            color: #2c3e50;
            margin-bottom: 25px;
            line-height: 1.3;
            text-align: center;
            border-bottom: 3px solid #f39c12;
            padding-bottom: 20px;
        }
        h2 {
            font-size: 2.2rem;
            color: #2980b9;
            margin: 40px 0 20px;
            padding-left: 15px;
            border-left: 5px solid #3498db;
        }
        h3 {
            font-size: 1.8rem;
            color: #16a085;
            margin: 30px 0 15px;
        }
        h4 {
            font-size: 1.4rem;
            color: #8e44ad;
            margin: 25px 0 12px;
        }
        p {
            margin-bottom: 20px;
            text-align: justify;
            font-size: 1.1rem;
        }
        .highlight {
            background: linear-gradient(120deg, #ffeaa7 0%, #ffd166 100%);
            padding: 3px 8px;
            border-radius: 4px;
            font-weight: 700;
        }
        .bold {
            font-weight: 800;
            color: #2c3e50;
        }
        .emoji {
            font-size: 1.2em;
            margin: 0 5px;
        }
        .article-img {
            width: 100%;
            max-width: 800px;
            height: auto;
            border-radius: 12px;
            margin: 30px auto;
            display: block;
            box-shadow: 0 8px 20px rgba(0,0,0,0.15);
            border: 5px solid #fff;
            outline: 1px solid #ddd;
        }
        .content-link {
            color: #e74c3c;
            text-decoration: none;
            border-bottom: 2px dotted #e74c3c;
            transition: all 0.3s;
            font-weight: 600;
        }
        .content-link:hover {
            color: #c0392b;
            border-bottom-style: solid;
            background: #fff5f5;
        }
        .user-section {
            background: #f8f9fa;
            border-radius: 12px;
            padding: 30px;
            margin: 50px 0;
            border-left: 5px solid #3498db;
        }
        .user-section h3 {
            color: #2c3e50;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .user-section h3 i {
            color: #3498db;
        }
        .form-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 20px;
            margin-top: 20px;
        }
        .form-group {
            margin-bottom: 20px;
        }
        label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
            color: #2c3e50;
        }
        input, textarea, select {
            width: 100%;
            padding: 14px;
            border: 2px solid #ddd;
            border-radius: 8px;
            font-size: 1rem;
            transition: border 0.3s;
        }
        input:focus, textarea:focus, select:focus {
            border-color: #3498db;
            outline: none;
            box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.2);
        }
        button {
            background: linear-gradient(135deg, #3498db 0%, #2980b9 100%);
            color: white;
            border: none;
            padding: 15px 30px;
            border-radius: 8px;
            font-size: 1.1rem;
            font-weight: 700;
            cursor: pointer;
            transition: all 0.3s;
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }
        button:hover {
            transform: translateY(-3px);
            box-shadow: 0 7px 15px rgba(52, 152, 219, 0.4);
            background: linear-gradient(135deg, #2980b9 0%, #3498db 100%);
        }
        footer {
            background: #2c3e50;
            color: white;
            padding: 50px 0 20px;
            margin-top: 60px;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-section h4 {
            color: #f39c12;
            font-size: 1.4rem;
            margin-bottom: 25px;
            padding-bottom: 10px;
            border-bottom: 2px solid #34495e;
        }
        friend-link {
            display: block;
            margin-bottom: 15px;
        }
        friend-link a {
            color: #bdc3c7;
            text-decoration: none;
            transition: color 0.3s;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        friend-link a::before {
            content: '▸';
            color: #3498db;
        }
        friend-link a:hover {
            color: white;
            padding-left: 5px;
        }
        .copyright {
            text-align: center;
            padding-top: 25px;
            border-top: 1px solid #34495e;
            color: #95a5a6;
            font-size: 0.95rem;
        }
        @media (max-width: 992px) {
            h1 { font-size: 2.4rem; }
            h2 { font-size: 2rem; }
            h3 { font-size: 1.6rem; }
            article { padding: 30px; }
        }
        @media (max-width: 768px) {
            .nav-desktop { display: none; }
            .hamburger { display: block; }
            .header-top { padding: 12px 0; }
            h1 { font-size: 2rem; }
            h2 { font-size: 1.7rem; }
            h3 { font-size: 1.4rem; }
            article { padding: 25px 20px; }
            .user-section { padding: 25px 20px; }
        }
        @media (max-width: 480px) {
            .container { padding: 0 15px; }
            h1 { font-size: 1.8rem; }
            .my-logo { font-size: 1.5rem; }
            button { width: 100%; justify-content: center; }
        }
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        article {
            animation: fadeIn 0.8s ease-out;
        }
        .tip-box {
            background: #e8f6f3;
            border-left: 5px solid #16a085;
            padding: 20px;
            margin: 25px 0;
            border-radius: 0 8px 8px 0;
        }
        .warning-box {
            background: #ffeaa7;
            border-left: 5px solid #f39c12;
            padding: 20px;
            margin: 25px 0;
            border-radius: 0 8px 8px 0;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 20px;
            margin: 30px 0;
        }
        .stat-card {
            background: #3498db;
            color: white;
            padding: 25px;
            border-radius: 10px;
            text-align: center;
            box-shadow: 0 5px 15px rgba(52, 152, 219, 0.3);
        }
        .stat-card h4 {
            color: white;
            font-size: 2.5rem;
            margin: 10px 0;
        }