* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            background-color: #0f1419;
            color: #e0e7ff;
            line-height: 1.7;
            overflow-x: hidden;
        }
        a {
            color: #5dade2;
            text-decoration: none;
            transition: color 0.3s ease, transform 0.2s ease;
        }
        a:hover {
            color: #7fb3d5;
            transform: translateY(-2px);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 8px;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        section {
            padding: 50px 0;
        }
        h1, h2, h3, h4 {
            color: #85c1e9;
            margin-bottom: 1rem;
            line-height: 1.3;
        }
        h1 {
            font-size: 2.8rem;
            background: linear-gradient(90deg, #85c1e9, #aed6f1);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            text-shadow: 0 2px 10px rgba(133, 193, 233, 0.2);
        }
        h2 {
            font-size: 2.2rem;
            border-left: 5px solid #3498db;
            padding-left: 15px;
            margin-top: 2.5rem;
        }
        h3 {
            font-size: 1.7rem;
            color: #a3e4d7;
            margin-top: 2rem;
        }
        p {
            margin-bottom: 1.5rem;
            font-size: 1.1rem;
        }
        .highlight {
            background: linear-gradient(135deg, #1c2833 0%, #2c3e50 100%);
            border-left: 4px solid #e74c3c;
            padding: 20px;
            border-radius: 0 8px 8px 0;
            margin: 25px 0;
            box-shadow: 0 5px 15px rgba(0,0,0,0.3);
        }
        .emoji {
            font-size: 1.3em;
            margin-right: 5px;
        }
        .keyword {
            font-weight: bold;
            color: #f7dc6f;
            background-color: rgba(247, 220, 111, 0.1);
            padding: 2px 6px;
            border-radius: 4px;
        }
        .site-header {
            background: linear-gradient(180deg, #1b2631 0%, #0f1419 100%);
            padding: 15px 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.5);
            border-bottom: 1px solid #2c3e50;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .logo a {
            font-size: 2.2rem;
            font-weight: 800;
            background: linear-gradient(90deg, #3498db, #2ecc71);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            letter-spacing: -0.5px;
        }
        .logo a:hover {
            transform: none;
            filter: brightness(1.2);
        }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 30px;
        }
        .main-nav a {
            color: #d6eaf8;
            font-weight: 600;
            font-size: 1.05rem;
            padding: 8px 5px;
            border-bottom: 2px solid transparent;
        }
        .main-nav a:hover,
        .main-nav a.active {
            color: #85c1e9;
            border-bottom-color: #85c1e9;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: #85c1e9;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 5px;
        }
        .hamburger:focus {
            outline: 2px solid #85c1e9;
            border-radius: 4px;
        }
        .breadcrumb {
            background-color: #1c2833;
            padding: 12px 0;
            font-size: 0.95rem;
            border-bottom: 1px solid #2c3e50;
        }
        .breadcrumb .container {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 10px;
        }
        .breadcrumb a {
            color: #aed6f1;
        }
        .breadcrumb i {
            margin: 0 8px;
            color: #5dade2;
        }
        .breadcrumb span {
            color: #f7dc6f;
        }
        .hero {
            padding: 60px 0 30px;
            text-align: center;
            background: radial-gradient(ellipse at center, #1c2833 0%, #0f1419 70%);
        }
        .hero p {
            font-size: 1.3rem;
            max-width: 800px;
            margin: 20px auto 30px;
            color: #d6eaf8;
        }
        .search-section {
            background-color: #1c2833;
            padding: 30px 0;
            border-top: 1px solid #2c3e50;
            border-bottom: 1px solid #2c3e50;
        }
        .search-box {
            max-width: 700px;
            margin: 0 auto;
        }
        .search-box form {
            display: flex;
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.4);
            border-radius: 50px;
            overflow: hidden;
            border: 1px solid #3498db;
        }
        .search-box input {
            flex: 1;
            padding: 18px 25px;
            border: none;
            background-color: #2c3e50;
            color: #ecf0f1;
            font-size: 1.1rem;
        }
        .search-box input::placeholder {
            color: #bdc3c7;
        }
        .search-box button {
            background: linear-gradient(90deg, #3498db, #2980b9);
            color: white;
            border: none;
            padding: 0 35px;
            cursor: pointer;
            font-size: 1.1rem;
            font-weight: 600;
            transition: all 0.3s ease;
        }
        .search-box button:hover {
            background: linear-gradient(90deg, #2980b9, #1c5c7a);
            padding: 0 40px;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
            margin-top: 30px;
        }
        .article-content {
            background-color: rgba(28, 40, 51, 0.7);
            padding: 30px;
            border-radius: 15px;
            border: 1px solid #34495e;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
        }
        .class-card {
            background: linear-gradient(145deg, #2c3e50, #1c2833);
            border-radius: 12px;
            padding: 25px;
            margin-bottom: 30px;
            border: 1px solid #4a6fa5;
            transition: transform 0.4s ease, box-shadow 0.4s ease;
        }
        .class-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 35px rgba(52, 152, 219, 0.2);
            border-color: #85c1e9;
        }
        .class-icon {
            font-size: 2.5rem;
            margin-bottom: 15px;
            color: #f7dc6f;
        }
        .gear-list {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 15px;
            margin: 20px 0;
        }
        .gear-item {
            background-color: #34495e;
            padding: 12px;
            border-radius: 8px;
            border-left: 4px solid #2ecc71;
        }
        .sidebar {
            background-color: rgba(28, 40, 51, 0.7);
            padding: 25px;
            border-radius: 15px;
            border: 1px solid #34495e;
            align-self: start;
            position: sticky;
            top: 120px;
        }
        .sidebar h3 {
            margin-top: 0;
            color: #a3e4d7;
            border-bottom: 2px solid #2ecc71;
            padding-bottom: 10px;
        }
        .sidebar ul {
            list-style: none;
        }
        .sidebar li {
            margin-bottom: 12px;
            padding-left: 20px;
            position: relative;
        }
        .sidebar li:before {
            content: '▶';
            position: absolute;
            left: 0;
            color: #3498db;
            font-size: 0.8rem;
        }
        .interactive-section {
            background-color: #1c2833;
            padding: 40px 0;
            border-top: 1px solid #2c3e50;
            border-bottom: 1px solid #2c3e50;
        }
        .form-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
            margin-top: 30px;
        }
        .form-box {
            background-color: #2c3e50;
            padding: 25px;
            border-radius: 12px;
            border: 1px solid #4a6fa5;
        }
        .form-box h3 {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .form-box h3 i {
            color: #f7dc6f;
        }
        .form-group {
            margin-bottom: 20px;
        }
        .form-group label {
            display: block;
            margin-bottom: 8px;
            color: #d6eaf8;
            font-weight: 600;
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 12px 15px;
            background-color: #34495e;
            border: 1px solid #5dade2;
            border-radius: 6px;
            color: #ecf0f1;
            font-size: 1rem;
        }
        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            outline: none;
            border-color: #85c1e9;
            box-shadow: 0 0 8px rgba(133, 193, 233, 0.5);
        }
        .rating {
            display: flex;
            gap: 10px;
            direction: rtl;
            justify-content: start;
        }
        .rating input {
            display: none;
        }
        .rating label {
            font-size: 2rem;
            color: #555;
            cursor: pointer;
            transition: color 0.3s;
        }
        .rating label:hover,
        .rating label:hover ~ label,
        .rating input:checked ~ label {
            color: #f7dc6f;
        }
        .submit-btn {
            background: linear-gradient(90deg, #2ecc71, #27ae60);
            color: white;
            border: none;
            padding: 14px 30px;
            border-radius: 50px;
            font-size: 1.1rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            display: block;
            width: 100%;
        }
        .submit-btn:hover {
            background: linear-gradient(90deg, #27ae60, #219653);
            box-shadow: 0 5px 15px rgba(46, 204, 113, 0.4);
        }
        .web-links-section {
            padding: 40px 0;
            background-color: #1c2833;
        }
        .web-links-container {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 20px;
        }
        .web-link {
            background: linear-gradient(135deg, #2c3e50, #34495e);
            padding: 18px;
            border-radius: 10px;
            border: 1px solid #4a6fa5;
            text-align: center;
            transition: all 0.3s ease;
        }
        .web-link:hover {
            background: linear-gradient(135deg, #34495e, #4a6fa5);
            transform: scale(1.03);
        }
        .site-footer {
            background: linear-gradient(180deg, #1b2631 0%, #0a0e13 100%);
            padding: 50px 0 20px;
            border-top: 2px solid #2c3e50;
        }
        .footer-container {
            display: flex;
            flex-direction: column;
            gap: 40px;
        }
        .copyright {
            text-align: center;
            padding-top: 25px;
            border-top: 1px solid #34495e;
            color: #bdc3c7;
            font-size: 0.95rem;
        }
        @media (max-width: 992px) {
            .content-grid {
                grid-template-columns: 1fr;
            }
            .sidebar {
                position: static;
            }
            h1 {
                font-size: 2.4rem;
            }
            h2 {
                font-size: 1.9rem;
            }
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
            .main-nav {
                position: fixed;
                top: 80px;
                left: 0;
                width: 100%;
                background-color: #1c2833;
                border-top: 1px solid #2c3e50;
                box-shadow: 0 10px 20px rgba(0,0,0,0.5);
                clip-path: polygon(0 0, 100% 0, 100% 0, 0 0);
                transition: clip-path 0.5s ease;
                z-index: 999;
            }
            .main-nav.active {
                clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%);
            }
            .main-nav ul {
                flex-direction: column;
                padding: 20px;
                gap: 0;
            }
            .main-nav li {
                width: 100%;
                border-bottom: 1px solid #2c3e50;
            }
            .main-nav a {
                display: block;
                padding: 15px 10px;
                border-bottom: none;
            }
            .header-container {
                padding: 0 10px;
            }
            .article-content, .sidebar, .form-box {
                padding: 20px;
            }
            .hero p {
                font-size: 1.1rem;
            }
        }
        @media (max-width: 480px) {
            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.7rem;
            }
            .form-grid {
                grid-template-columns: 1fr;
            }
            .gear-list {
                grid-template-columns: 1fr;
            }
        }