* { margin: 0; padding: 0; box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.8;
            color: #333;
            background: linear-gradient(135deg, #0c1a2d 0%, #1a2b3c 100%);
            color: #e0e0e0;
            max-width: 100%;
            overflow-x: hidden;
        }
        a { color: #4da6ff; text-decoration: none; transition: color 0.3s ease, transform 0.2s ease; }
        a:hover { color: #80c1ff; transform: translateY(-2px); }
        img { max-width: 100%; height: auto; display: block; }
        ul, ol { padding-left: 2rem; margin: 1rem 0; }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: rgba(12, 26, 45, 0.95);
            backdrop-filter: blur(10px);
            border-bottom: 3px solid #ff9900;
            position: sticky;
            top: 0;
            z-index: 1000;
            padding: 15px 0;
        }
        .header-inner {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-family: 'Palatino Linotype', 'Book Antiqua', Palatino, serif;
            font-size: 2.5rem;
            font-weight: 900;
            background: linear-gradient(to right, #ff9900, #ffcc00);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            text-shadow: 0 2px 4px rgba(0,0,0,0.3);
            letter-spacing: 1px;
        }
        .my-logo:hover { transform: scale(1.05); }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 25px;
        }
        .main-nav a {
            color: #ccc;
            font-weight: 600;
            font-size: 1.1rem;
            padding: 8px 12px;
            border-radius: 5px;
        }
        .main-nav a:hover {
            background: rgba(255, 153, 0, 0.2);
            color: #ff9900;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            color: #ff9900;
            cursor: pointer;
            padding: 5px;
        }
        .breadcrumb {
            background: rgba(255,255,255,0.05);
            padding: 12px 20px;
            border-radius: 0 0 8px 8px;
            margin-bottom: 2rem;
            font-size: 0.9rem;
        }
        .breadcrumb a { color: #aaa; }
        .breadcrumb a:hover { color: #ff9900; }
        .breadcrumb .separator { margin: 0 10px; color: #666; }
        main {
            background: rgba(26, 43, 60, 0.9);
            border-radius: 12px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.5);
            padding: 2.5rem;
            margin: 2rem auto;
        }
        article h1 {
            font-size: 3rem;
            color: #ffcc00;
            margin-bottom: 1.5rem;
            text-align: center;
            border-bottom: 3px solid #ff9900;
            padding-bottom: 15px;
            text-shadow: 0 2px 5px rgba(0,0,0,0.5);
        }
        article h2 {
            font-size: 2.2rem;
            color: #4da6ff;
            margin: 2.5rem 0 1rem 0;
            padding-left: 10px;
            border-left: 5px solid #ff9900;
        }
        article h3 {
            font-size: 1.8rem;
            color: #80c1ff;
            margin: 2rem 0 1rem 0;
        }
        article h4 {
            font-size: 1.4rem;
            color: #a6d2ff;
            margin: 1.5rem 0 0.8rem 0;
        }
        article p {
            margin-bottom: 1.5rem;
            text-align: justify;
            font-size: 1.1rem;
        }
        .highlight-box {
            background: linear-gradient(to right, rgba(255,153,0,0.1), rgba(26,43,60,0.7));
            border-left: 5px solid #ff9900;
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 8px 8px 0;
        }
        .deck-code {
            font-family: 'Courier New', monospace;
            background: #1a1a2e;
            color: #00ffaa;
            padding: 15px;
            border-radius: 8px;
            margin: 1rem 0;
            border: 1px solid #333;
            overflow-x: auto;
        }
        .image-wrapper {
            margin: 2.5rem auto;
            text-align: center;
            max-width: 900px;
        }
        .image-wrapper img {
            border-radius: 12px;
            border: 3px solid #ff9900;
            box-shadow: 0 8px 20px rgba(0,0,0,0.7);
            transition: transform 0.4s ease;
        }
        .image-wrapper img:hover { transform: scale(1.02); }
        .image-caption {
            font-style: italic;
            color: #aaa;
            margin-top: 10px;
            font-size: 0.95rem;
        }
        .emoji { font-size: 1.2em; margin-right: 5px; }
        .interactive-section {
            background: rgba(12, 26, 45, 0.8);
            border-radius: 12px;
            padding: 2rem;
            margin: 3rem 0;
            border: 1px solid #444;
        }
        .interactive-section h3 { color: #ff9900; text-align: center; }
        .form-group {
            margin-bottom: 1.5rem;
        }
        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
            color: #ccc;
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 12px 15px;
            border-radius: 8px;
            border: 1px solid #555;
            background: #1a2b3c;
            color: #fff;
            font-size: 1rem;
            transition: border 0.3s;
        }
        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            outline: none;
            border-color: #ff9900;
            box-shadow: 0 0 0 3px rgba(255, 153, 0, 0.2);
        }
        .rating-stars {
            display: flex;
            gap: 10px;
            margin: 1rem 0;
        }
        .star {
            font-size: 2rem;
            color: #555;
            cursor: pointer;
            transition: color 0.2s, transform 0.2s;
        }
        .star:hover,
        .star.active {
            color: #ffcc00;
            transform: scale(1.2);
        }
        .btn {
            display: inline-block;
            background: linear-gradient(to right, #ff9900, #ff6600);
            color: #fff;
            font-weight: bold;
            padding: 14px 28px;
            border: none;
            border-radius: 8px;
            cursor: pointer;
            font-size: 1.1rem;
            transition: all 0.3s ease;
            text-align: center;
        }
        .btn:hover {
            background: linear-gradient(to right, #ffaa33, #ff7733);
            transform: translateY(-3px);
            box-shadow: 0 7px 15px rgba(255, 102, 0, 0.4);
        }
        .btn:active { transform: translateY(-1px); }
        .site-footer {
            background: #0c1a2d;
            color: #aaa;
            padding: 3rem 0 1.5rem 0;
            border-top: 3px solid #ff9900;
            margin-top: 4rem;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-section h4 {
            color: #ffcc00;
            margin-bottom: 1.2rem;
            font-size: 1.3rem;
        }
        friend-link {
            display: block;
            padding: 8px 0;
            border-bottom: 1px dashed #444;
            color: #4da6ff;
        }
        friend-link:hover { color: #ff9900; border-bottom-style: solid; }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #333;
            font-size: 0.9rem;
            color: #777;
        }
        .last-updated {
            color: #ff9900;
            font-weight: bold;
        }
        @media (max-width: 992px) {
            .container { padding: 0 15px; }
            article h1 { font-size: 2.5rem; }
            article h2 { font-size: 2rem; }
            article h3 { font-size: 1.6rem; }
            .main-nav ul { gap: 15px; }
        }
        @media (max-width: 768px) {
            .my-logo { font-size: 2rem; }
            .hamburger { display: block; }
            .main-nav {
                position: fixed;
                top: 80px;
                left: 0;
                width: 100%;
                background: rgba(12, 26, 45, 0.98);
                backdrop-filter: blur(10px);
                padding: 20px;
                border-top: 1px solid #444;
                clip-path: polygon(0 0, 100% 0, 100% 0, 0 0);
                transition: clip-path 0.4s ease-in-out;
            }
            .main-nav.active {
                clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%);
            }
            .main-nav ul {
                flex-direction: column;
                gap: 0;
            }
            .main-nav li {
                border-bottom: 1px solid #333;
            }
            .main-nav a {
                display: block;
                padding: 15px;
            }
            .header-inner { flex-wrap: wrap; }
            main { padding: 1.5rem; }
            .footer-content { grid-template-columns: 1fr; }
        }
        @media (max-width: 480px) {
            article h1 { font-size: 2rem; }
            article h2 { font-size: 1.7rem; }
            .interactive-section { padding: 1.5rem; }
            .btn { width: 100%; }
        }