* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            background: linear-gradient(135deg, #0c1a2d 0%, #1a2b3e 100%);
            color: #e0e7ff;
            line-height: 1.8;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        a {
            color: #4dabf7;
            text-decoration: none;
            transition: color 0.3s ease, transform 0.2s ease;
        }
        a:hover {
            color: #74c0fc;
            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;
        }
        .site-header {
            background: rgba(12, 26, 45, 0.95);
            backdrop-filter: blur(10px);
            border-bottom: 2px solid #1e3a5f;
            position: sticky;
            top: 0;
            z-index: 1000;
            padding: 15px 0;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .logo a {
            font-size: 2.2rem;
            font-weight: 800;
            background: linear-gradient(to right, #3bc9db, #4dabf7);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            text-shadow: 0 2px 10px rgba(59, 201, 219, 0.3);
        }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 30px;
        }
        .main-nav a {
            color: #c5d1eb;
            font-weight: 600;
            font-size: 1.1rem;
            padding: 8px 5px;
            border-bottom: 2px solid transparent;
        }
        .main-nav a:hover,
        .main-nav a.active {
            color: #4dabf7;
            border-bottom-color: #4dabf7;
        }
        .hamburger {
            display: none;
            flex-direction: column;
            cursor: pointer;
            gap: 5px;
            background: transparent;
            border: none;
        }
        .hamburger span {
            width: 25px;
            height: 3px;
            background: #4dabf7;
            border-radius: 2px;
            transition: 0.3s;
        }
        .breadcrumb {
            padding: 15px 0;
            font-size: 0.9rem;
            color: #94a3b8;
            border-bottom: 1px solid #2d3748;
        }
        .breadcrumb a {
            color: #94a3b8;
        }
        .breadcrumb a:hover {
            color: #4dabf7;
        }
        .search-section {
            background: #1e293b;
            padding: 30px 0;
            margin: 20px 0;
            border-radius: 12px;
            text-align: center;
        }
        .search-form {
            max-width: 600px;
            margin: 0 auto;
            display: flex;
            border-radius: 50px;
            overflow: hidden;
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
        }
        .search-input {
            flex-grow: 1;
            padding: 18px 25px;
            border: none;
            background: #334155;
            color: #f8fafc;
            font-size: 1.1rem;
        }
        .search-input::placeholder {
            color: #94a3b8;
        }
        .search-btn {
            background: linear-gradient(90deg, #3bc9db, #4dabf7);
            color: white;
            border: none;
            padding: 0 30px;
            cursor: pointer;
            font-weight: 600;
            font-size: 1.1rem;
            transition: opacity 0.3s;
        }
        .search-btn:hover {
            opacity: 0.9;
        }
        .main-content {
            flex-grow: 1;
            padding: 30px 0;
        }
        .article-header {
            text-align: center;
            margin-bottom: 40px;
            padding-bottom: 25px;
            border-bottom: 2px solid #2d3748;
        }
        .article-header h1 {
            font-size: 2.8rem;
            margin-bottom: 15px;
            background: linear-gradient(to right, #3bc9db, #74c0fc);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            line-height: 1.2;
        }
        .article-meta {
            color: #94a3b8;
            font-size: 1rem;
            display: flex;
            justify-content: center;
            gap: 20px;
            flex-wrap: wrap;
        }
        .article-meta i {
            margin-right: 8px;
            color: #4dabf7;
        }
        .content-section {
            margin-bottom: 50px;
            background: rgba(30, 41, 59, 0.6);
            padding: 30px;
            border-radius: 12px;
            border-left: 5px solid #4dabf7;
            box-shadow: 0 6px 15px rgba(0, 0, 0, 0.2);
            transition: transform 0.3s ease;
        }
        .content-section:hover {
            transform: translateY(-5px);
        }
        .content-section h2 {
            font-size: 2.2rem;
            margin-bottom: 20px;
            color: #74c0fc;
            display: flex;
            align-items: center;
            gap: 15px;
        }
        .content-section h2 i {
            color: #3bc9db;
        }
        .content-section h3 {
            font-size: 1.7rem;
            margin: 25px 0 15px;
            color: #a5d8ff;
            padding-left: 10px;
            border-left: 4px solid #3bc9db;
        }
        .content-section p {
            margin-bottom: 20px;
            font-size: 1.15rem;
            color: #e2e8f0;
        }
        .highlight {
            background: rgba(59, 201, 219, 0.15);
            border-left: 4px solid #3bc9db;
            padding: 20px;
            border-radius: 0 8px 8px 0;
            margin: 25px 0;
        }
        .mistake-list {
            list-style: none;
            counter-reset: mistake-counter;
            margin: 30px 0;
        }
        .mistake-list li {
            counter-increment: mistake-counter;
            background: rgba(45, 55, 72, 0.7);
            margin-bottom: 20px;
            padding: 25px 25px 25px 80px;
            border-radius: 10px;
            position: relative;
            border: 1px solid #3a506b;
            transition: all 0.3s ease;
        }
        .mistake-list li:hover {
            border-color: #4dabf7;
            box-shadow: 0 5px 15px rgba(77, 171, 247, 0.2);
        }
        .mistake-list li::before {
            content: counter(mistake-counter);
            position: absolute;
            left: 20px;
            top: 50%;
            transform: translateY(-50%);
            background: linear-gradient(135deg, #3bc9db, #4dabf7);
            color: white;
            width: 50px;
            height: 50px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            font-weight: bold;
            box-shadow: 0 4px 10px rgba(59, 201, 219, 0.4);
        }
        .rating-section {
            background: #1a2b3e;
            padding: 40px;
            border-radius: 12px;
            margin: 40px 0;
            text-align: center;
        }
        .star-rating {
            display: flex;
            justify-content: center;
            gap: 10px;
            margin: 25px 0;
            flex-wrap: wrap;
        }
        .star {
            font-size: 2.5rem;
            color: #475569;
            cursor: pointer;
            transition: color 0.2s, transform 0.2s;
        }
        .star:hover,
        .star.active {
            color: #ffd43b;
            transform: scale(1.2);
        }
        .comment-form {
            background: #1e293b;
            padding: 30px;
            border-radius: 12px;
            margin-top: 40px;
        }
        .form-group {
            margin-bottom: 25px;
        }
        .form-group label {
            display: block;
            margin-bottom: 10px;
            color: #c5d1eb;
            font-weight: 600;
        }
        .form-control {
            width: 100%;
            padding: 15px;
            background: #334155;
            border: 1px solid #475569;
            border-radius: 8px;
            color: #f8fafc;
            font-size: 1rem;
            transition: border-color 0.3s;
        }
        .form-control:focus {
            outline: none;
            border-color: #4dabf7;
            box-shadow: 0 0 0 3px rgba(77, 171, 247, 0.2);
        }
        .submit-btn {
            background: linear-gradient(90deg, #3bc9db, #4dabf7);
            color: white;
            border: none;
            padding: 16px 40px;
            border-radius: 8px;
            font-size: 1.1rem;
            font-weight: 600;
            cursor: pointer;
            transition: opacity 0.3s, transform 0.2s;
        }
        .submit-btn:hover {
            opacity: 0.9;
            transform: translateY(-3px);
        }
        .footer-links {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 20px;
            margin: 50px 0 30px;
        }
        .web-link {
            background: rgba(30, 41, 59, 0.7);
            padding: 20px;
            border-radius: 8px;
            border: 1px solid #3a506b;
            transition: all 0.3s ease;
        }
        .web-link:hover {
            border-color: #4dabf7;
            transform: translateY(-5px);
        }
        .web-link a {
            color: #e2e8f0;
            font-weight: 600;
            display: block;
            padding: 8px 0;
            border-bottom: 1px dashed #475569;
        }
        .web-link a:last-child {
            border-bottom: none;
        }
        .site-footer {
            background: #0c1a2d;
            padding: 40px 0 20px;
            margin-top: 50px;
            border-top: 2px solid #1e3a5f;
            text-align: center;
        }
        .copyright {
            color: #94a3b8;
            font-size: 0.95rem;
            margin-top: 20px;
            padding-top: 20px;
            border-top: 1px solid #2d3748;
        }
        @media (max-width: 992px) {
            .article-header h1 {
                font-size: 2.4rem;
            }
            .content-section h2 {
                font-size: 1.9rem;
            }
        }
        @media (max-width: 768px) {
            .main-nav ul {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background: rgba(12, 26, 45, 0.98);
                padding: 20px;
                border-top: 2px solid #1e3a5f;
                box-shadow: 0 10px 20px rgba(0,0,0,0.3);
            }
            .main-nav.active ul {
                display: flex;
            }
            .hamburger {
                display: flex;
            }
            .article-header h1 {
                font-size: 2rem;
            }
            .content-section {
                padding: 20px;
            }
            .content-section h2 {
                font-size: 1.7rem;
            }
            .content-section h3 {
                font-size: 1.5rem;
            }
            .mistake-list li {
                padding: 20px 20px 20px 70px;
            }
            .footer-links {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 480px) {
            .logo a {
                font-size: 1.8rem;
            }
            .article-header h1 {
                font-size: 1.8rem;
            }
            .search-input {
                padding: 15px;
            }
            .star {
                font-size: 2rem;
            }
        }