* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        :root {
            --primary-color: #1a237e;
            --secondary-color: #ff5722;
            --accent-color: #4fc3f7;
            --dark-bg: #121212;
            --light-bg: #f5f5f7;
            --text-dark: #333;
            --text-light: #eee;
            --card-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
            --transition: all 0.3s ease;
        }
        body {
            background-color: var(--light-bg);
            color: var(--text-dark);
            line-height: 1.7;
            overflow-x: hidden;
        }
        a {
            text-decoration: none;
            color: inherit;
        }
        ul {
            list-style: none;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .main-header {
            background: linear-gradient(135deg, var(--primary-color) 0%, #283593 100%);
            color: var(--text-light);
            padding: 1rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .logo {
            font-size: 2.2rem;
            font-weight: 900;
            text-transform: uppercase;
            letter-spacing: 1.5px;
            background: linear-gradient(to right, #ff9800, var(--accent-color));
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            transition: var(--transition);
        }
        .logo:hover {
            transform: scale(1.05);
        }
        .main-nav ul {
            display: flex;
            gap: 2rem;
        }
        .nav-link {
            font-weight: 600;
            padding: 0.5rem 1rem;
            border-radius: 4px;
            transition: var(--transition);
            position: relative;
        }
        .nav-link:hover {
            background-color: rgba(255, 255, 255, 0.15);
            color: var(--accent-color);
        }
        .nav-link::after {
            content: '';
            position: absolute;
            bottom: -5px;
            left: 10%;
            width: 80%;
            height: 3px;
            background-color: var(--secondary-color);
            transform: scaleX(0);
            transition: transform 0.3s ease;
        }
        .nav-link:hover::after {
            transform: scaleX(1);
        }
        .breadcrumb {
            background-color: rgba(255, 255, 255, 0.05);
            padding: 0.8rem 0;
            font-size: 0.9rem;
        }
        .breadcrumb ul {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
        }
        .breadcrumb li:not(:last-child)::after {
            content: '>';
            margin-left: 0.5rem;
            color: var(--accent-color);
        }
        .breadcrumb a:hover {
            color: var(--accent-color);
            text-decoration: underline;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            color: white;
            cursor: pointer;
        }
        .hero {
            padding: 4rem 0;
            text-align: center;
            background: linear-gradient(rgba(26, 35, 126, 0.85), rgba(26, 35, 126, 0.9)), url('https://images.unsplash.com/photo-1550745165-9bc0b252726f?ixlib=rb-4.0.3&auto=format&fit=crop&w=1350&q=80') center/cover no-repeat;
            color: white;
            margin-bottom: 2rem;
        }
        .hero h1 {
            font-size: 3.2rem;
            margin-bottom: 1.5rem;
            text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
        }
        .hero p {
            font-size: 1.3rem;
            max-width: 800px;
            margin: 0 auto 2rem;
            opacity: 0.95;
        }
        .content-wrapper {
            display: grid;
            grid-template-columns: 1fr 350px;
            gap: 3rem;
            padding: 2rem 0;
        }
        .main-article {
            background-color: white;
            padding: 2.5rem;
            border-radius: 16px;
            box-shadow: var(--card-shadow);
        }
        .main-article h2 {
            color: var(--primary-color);
            border-left: 5px solid var(--secondary-color);
            padding-left: 1rem;
            margin: 2.5rem 0 1.5rem;
            font-size: 2rem;
        }
        .main-article h3 {
            color: #555;
            margin: 2rem 0 1rem;
            font-size: 1.5rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px dashed #eee;
        }
        .main-article p {
            margin-bottom: 1.5rem;
            font-size: 1.1rem;
            text-align: justify;
        }
        .article-img {
            width: 100%;
            border-radius: 12px;
            margin: 2rem auto;
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
            transition: transform 0.5s ease;
        }
        .article-img:hover {
            transform: translateY(-5px);
        }
        .highlight {
            background: linear-gradient(120deg, #e1f5fe 0%, #b3e5fc 100%);
            padding: 2rem;
            border-radius: 12px;
            border-left: 6px solid var(--accent-color);
            margin: 2.5rem 0;
        }
        .highlight strong {
            color: var(--primary-color);
            font-size: 1.2rem;
        }
        .tier-list {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 1.5rem;
            margin: 2.5rem 0;
        }
        .tier-card {
            background: white;
            border-radius: 12px;
            padding: 1.5rem;
            box-shadow: 0 6px 15px rgba(0, 0, 0, 0.08);
            transition: var(--transition);
            border-top: 4px solid var(--secondary-color);
        }
        .tier-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 12px 25px rgba(0, 0, 0, 0.15);
        }
        .tier-card h4 {
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--primary-color);
            margin-bottom: 1rem;
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 2rem;
        }
        .widget {
            background-color: white;
            padding: 1.8rem;
            border-radius: 12px;
            box-shadow: var(--card-shadow);
        }
        .widget h3 {
            color: var(--primary-color);
            margin-bottom: 1.5rem;
            padding-bottom: 0.7rem;
            border-bottom: 2px solid #eee;
        }
        .search-form {
            display: flex;
        }
        .search-input {
            flex-grow: 1;
            padding: 0.9rem 1.2rem;
            border: 2px solid #ddd;
            border-radius: 8px 0 0 8px;
            font-size: 1rem;
            outline: none;
            transition: border-color 0.3s;
        }
        .search-input:focus {
            border-color: var(--accent-color);
        }
        .search-btn {
            background-color: var(--secondary-color);
            color: white;
            border: none;
            padding: 0 1.5rem;
            border-radius: 0 8px 8px 0;
            cursor: pointer;
            transition: var(--transition);
            font-size: 1.1rem;
        }
        .search-btn:hover {
            background-color: #e64a19;
        }
        .rating-widget {
            text-align: center;
        }
        .stars {
            font-size: 2rem;
            color: #ffc107;
            margin: 1rem 0;
            cursor: pointer;
        }
        .stars span:hover,
        .stars span:hover ~ span {
            color: #ff9800;
        }
        .comment-form textarea {
            width: 100%;
            padding: 1rem;
            border: 2px solid #ddd;
            border-radius: 8px;
            resize: vertical;
            min-height: 120px;
            margin-bottom: 1rem;
            font-size: 1rem;
        }
        .submit-btn {
            background-color: var(--primary-color);
            color: white;
            border: none;
            padding: 0.9rem 2rem;
            border-radius: 8px;
            cursor: pointer;
            font-weight: 600;
            transition: var(--transition);
            width: 100%;
        }
        .submit-btn:hover {
            background-color: #0d1b6b;
            transform: translateY(-2px);
        }
        .footer-links {
            background-color: var(--dark-bg);
            padding: 3rem 0;
            margin-top: 4rem;
        }
        .web-links-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 1.5rem;
        }
        .web-link {
            background-color: rgba(255, 255, 255, 0.05);
            padding: 1.2rem;
            border-radius: 8px;
            transition: var(--transition);
        }
        .web-link:hover {
            background-color: rgba(255, 255, 255, 0.1);
            transform: translateX(5px);
        }
        .web-link a {
            color: var(--accent-color);
            display: block;
        }
        .web-link a:hover {
            text-decoration: underline;
        }
        .main-footer {
            background-color: #0a0a0a;
            color: #aaa;
            padding: 2.5rem 0;
            text-align: center;
        }
        .copyright {
            margin-top: 1.5rem;
            font-size: 0.9rem;
            opacity: 0.8;
        }
        @media (max-width: 992px) {
            .content-wrapper {
                grid-template-columns: 1fr;
            }
            .hero h1 {
                font-size: 2.5rem;
            }
        }
        @media (max-width: 768px) {
            .main-nav ul {
                position: fixed;
                top: 80px;
                left: 0;
                width: 100%;
                background-color: var(--primary-color);
                flex-direction: column;
                align-items: center;
                padding: 2rem 0;
                clip-path: polygon(0 0, 100% 0, 100% 0, 0 0);
                transition: clip-path 0.4s ease;
                z-index: 999;
            }
            .main-nav.active ul {
                clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%);
            }
            .nav-link {
                padding: 1rem;
                width: 80%;
                text-align: center;
            }
            .hamburger {
                display: block;
            }
            .hero h1 {
                font-size: 2rem;
            }
            .main-article {
                padding: 1.5rem;
            }
            .tier-list {
                grid-template-columns: 1fr;
            }
        }
        .emoji {
            font-size: 1.3em;
            margin-right: 8px;
            vertical-align: middle;
        }
        .key-term {
            background-color: #fff9c4;
            padding: 0.2rem 0.5rem;
            border-radius: 4px;
            font-weight: 700;
            color: #5d4037;
        }
        .pulse {
            animation: pulse 2s infinite;
        }
        @keyframes pulse {
            0% { box-shadow: 0 0 0 0 rgba(255, 87, 34, 0.7); }
            70% { box-shadow: 0 0 0 10px rgba(255, 87, 34, 0); }
            100% { box-shadow: 0 0 0 0 rgba(255, 87, 34, 0); }
        }