:root {
            --primary-blue: #1a365d;
            --accent-yellow: #f6ad55;
            --light-bg: #f7fafc;
            --medium-gray: #718096;
            --dark-gray: #2d3748;
            --success-green: #48bb78;
            --card-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
            --transition: all 0.3s ease;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            background-color: var(--light-bg);
            color: var(--dark-gray);
            line-height: 1.7;
            font-size: 1.05rem;
        }
        .site-header {
            background-color: white;
            box-shadow: var(--card-shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 1.5rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--primary-blue);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 0.75rem;
            padding: 1.25rem 0;
        }
        .my-logo i {
            color: var(--accent-yellow);
            font-size: 2rem;
        }
        .my-logo:hover {
            color: #2c5282;
        }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .main-nav a {
            text-decoration: none;
            color: var(--dark-gray);
            font-weight: 600;
            padding: 0.5rem 0;
            position: relative;
            transition: var(--transition);
        }
        .main-nav a:hover {
            color: var(--primary-blue);
        }
        .main-nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 3px;
            background-color: var(--accent-yellow);
            transition: width 0.3s ease;
        }
        .main-nav a:hover::after {
            width: 100%;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 1.8rem;
            color: var(--primary-blue);
            cursor: pointer;
        }
        .breadcrumb {
            max-width: 1280px;
            margin: 1rem auto;
            padding: 0 1.5rem;
            font-size: 0.9rem;
        }
        .breadcrumb a {
            color: var(--medium-gray);
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .main-content {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 1.5rem 3rem;
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
        }
        article {
            background-color: white;
            padding: 2.5rem;
            border-radius: 12px;
            box-shadow: var(--card-shadow);
        }
        aside {
            align-self: start;
            position: sticky;
            top: 120px;
        }
        .sidebar-widget {
            background-color: white;
            padding: 1.8rem;
            border-radius: 12px;
            box-shadow: var(--card-shadow);
            margin-bottom: 1.5rem;
        }
        h1 {
            color: var(--primary-blue);
            font-size: 2.8rem;
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-bottom: 4px solid var(--accent-yellow);
            padding-bottom: 0.75rem;
        }
        h2 {
            color: var(--primary-blue);
            font-size: 2rem;
            margin: 2.5rem 0 1.2rem;
            padding-top: 1rem;
        }
        h3 {
            color: var(--dark-gray);
            font-size: 1.5rem;
            margin: 2rem 0 1rem;
        }
        h4 {
            color: var(--medium-gray);
            font-size: 1.2rem;
            margin: 1.5rem 0 0.8rem;
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        .lead {
            font-size: 1.3rem;
            color: var(--primary-blue);
            font-weight: 600;
            margin-bottom: 2rem;
            background: #f0f4f8;
            padding: 1.5rem;
            border-left: 5px solid var(--accent-yellow);
            border-radius: 0 8px 8px 0;
        }
        .highlight {
            background-color: #fff9e6;
            padding: 1.5rem;
            border-radius: 8px;
            margin: 2rem 0;
            border-left: 4px solid var(--accent-yellow);
        }
        .tip {
            background-color: #e6fffa;
            padding: 1.2rem;
            border-radius: 8px;
            margin: 1.5rem 0;
            border-left: 4px solid var(--success-green);
            display: flex;
            align-items: flex-start;
            gap: 1rem;
        }
        .tip i {
            color: var(--success-green);
            font-size: 1.5rem;
            flex-shrink: 0;
            margin-top: 0.2rem;
        }
        .strategy-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 1.5rem;
            margin: 2rem 0;
        }
        .strategy-card {
            background: #f8f9fa;
            padding: 1.5rem;
            border-radius: 10px;
            border-top: 5px solid var(--primary-blue);
            transition: var(--transition);
        }
        .strategy-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 20px rgba(0,0,0,0.1);
        }
        .scorecard-img {
            width: 100%;
            max-width: 800px;
            height: auto;
            border-radius: 10px;
            box-shadow: 0 6px 18px rgba(0,0,0,0.1);
            margin: 2rem auto;
            display: block;
            border: 1px solid #e2e8f0;
        }
        .search-box {
            margin-bottom: 2rem;
        }
        .search-box input {
            width: 100%;
            padding: 0.9rem 1.2rem;
            border: 2px solid #cbd5e0;
            border-radius: 8px;
            font-size: 1rem;
            transition: var(--transition);
        }
        .search-box input:focus {
            outline: none;
            border-color: var(--primary-blue);
            box-shadow: 0 0 0 3px rgba(26, 54, 93, 0.2);
        }
        .interactive-form {
            background: #f8f9fa;
            padding: 2rem;
            border-radius: 10px;
            margin: 3rem 0;
        }
        .form-group {
            margin-bottom: 1.5rem;
        }
        .form-group label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 0.8rem;
            border: 1px solid #cbd5e0;
            border-radius: 6px;
            font-size: 1rem;
        }
        .btn {
            background-color: var(--primary-blue);
            color: white;
            padding: 0.9rem 1.8rem;
            border: none;
            border-radius: 6px;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
        }
        .btn:hover {
            background-color: #2c5282;
            transform: translateY(-2px);
        }
        .rating-stars {
            display: flex;
            gap: 0.5rem;
            margin: 1rem 0;
        }
        .rating-stars .star {
            font-size: 1.8rem;
            color: #e2e8f0;
            cursor: pointer;
            transition: color 0.2s;
        }
        .rating-stars .star.active {
            color: var(--accent-yellow);
        }
        .site-footer {
            background-color: var(--primary-blue);
            color: white;
            padding: 3rem 1.5rem;
            margin-top: 3rem;
        }
        .footer-container {
            max-width: 1280px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2.5rem;
        }
        .footer-links h4 {
            color: white;
            margin-bottom: 1.5rem;
        }
        .footer-links ul {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 0.8rem;
        }
        .footer-links a {
            color: #cbd5e0;
            text-decoration: none;
            transition: color 0.3s;
        }
        .footer-links a:hover {
            color: white;
            text-decoration: underline;
        }
        friend-link {
            display: block;
            margin: 1rem 0;
            padding: 0.8rem;
            background: rgba(255,255,255,0.05);
            border-radius: 6px;
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            margin-top: 2rem;
            border-top: 1px solid #4a5568;
            color: #a0aec0;
            font-size: 0.9rem;
        }
        @media (max-width: 1024px) {
            .main-content {
                grid-template-columns: 1fr;
            }
            aside {
                position: static;
            }
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
            .main-nav ul {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background-color: white;
                padding: 1rem;
                box-shadow: 0 10px 15px rgba(0,0,0,0.1);
            }
            .main-nav.active ul {
                display: flex;
            }
            h1 {
                font-size: 2.2rem;
            }
            .header-container {
                padding: 0 1rem;
            }
            .main-content, .breadcrumb {
                padding: 0 1rem;
            }
            article {
                padding: 1.5rem;
            }
        }