:root {
            --primary-color: #0a5f8a;
            --secondary-color: #c41230;
            --accent-color: #1b75bc;
            --dark-color: #1a2b3c;
            --light-color: #f5f9fc;
            --text-color: #333;
            --gray-color: #6c757d;
            --border-radius: 8px;
            --box-shadow: 0 5px 15px rgba(0,0,0,0.08);
            --transition: all 0.3s ease;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: var(--text-color);
            background-color: #fff;
            overflow-x: hidden;
        }
        a {
            color: var(--primary-color);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--secondary-color);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .text-center { text-align: center; }
        .mb-1 { margin-bottom: 1rem; }
        .mb-2 { margin-bottom: 2rem; }
        .mb-3 { margin-bottom: 3rem; }
        .mt-2 { margin-top: 2rem; }
        .mt-3 { margin-top: 3rem; }
        .py-2 { padding-top: 2rem; padding-bottom: 2rem; }
        .py-3 { padding-top: 3rem; padding-bottom: 3rem; }
        .site-header {
            background: linear-gradient(135deg, var(--dark-color), var(--primary-color));
            color: white;
            padding: 1rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: var(--box-shadow);
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 900;
            color: white;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
            letter-spacing: -0.5px;
        }
        .my-logo span {
            color: #ffcc00;
        }
        .my-logo:hover {
            color: #ffcc00;
        }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .main-nav a {
            color: white;
            font-weight: 600;
            font-size: 1.1rem;
            padding: 0.5rem 0;
            position: relative;
        }
        .main-nav a:hover {
            color: #ffcc00;
        }
        .main-nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 3px;
            background-color: #ffcc00;
            transition: var(--transition);
        }
        .main-nav a:hover::after {
            width: 100%;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 5px;
        }
        .breadcrumb {
            background-color: var(--light-color);
            padding: 1rem 0;
            border-bottom: 1px solid #ddd;
            font-size: 0.95rem;
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
        }
        .breadcrumb li:not(:last-child)::after {
            content: '>';
            margin: 0 10px;
            color: var(--gray-color);
        }
        .breadcrumb a {
            color: var(--primary-color);
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .hero {
            background: linear-gradient(rgba(10, 95, 138, 0.85), rgba(26, 43, 60, 0.9)), url('https://images.unsplash.com/photo-1577223625816-753c0f86c1c9?ixlib=rb-4.0.3&auto=format&fit=crop&w=1200&q=80') center/cover no-repeat;
            color: white;
            padding: 4rem 0;
            text-align: center;
        }
        .hero h1 {
            font-size: 3.2rem;
            margin-bottom: 1rem;
            text-shadow: 2px 2px 5px rgba(0,0,0,0.5);
        }
        .hero p {
            font-size: 1.3rem;
            max-width: 800px;
            margin: 0 auto 2rem;
        }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
            padding: 3rem 0;
        }
        @media (max-width: 992px) {
            .main-content {
                grid-template-columns: 1fr;
            }
        }
        article {
            background: white;
            border-radius: var(--border-radius);
            overflow: hidden;
        }
        .content-section {
            padding: 2rem;
            border-bottom: 1px solid #eee;
        }
        .content-section:last-of-type {
            border-bottom: none;
        }
        h1 { font-size: 2.8rem; margin-bottom: 1.5rem; color: var(--dark-color); }
        h2 { font-size: 2.2rem; margin: 2.5rem 0 1.5rem; color: var(--primary-color); padding-bottom: 0.5rem; border-bottom: 3px solid var(--accent-color); }
        h3 { font-size: 1.8rem; margin: 2rem 0 1rem; color: var(--secondary-color); }
        h4 { font-size: 1.4rem; margin: 1.5rem 0 1rem; color: var(--dark-color); }
        p { margin-bottom: 1.5rem; font-size: 1.1rem; }
        strong { color: var(--dark-color); }
        em { color: var(--gray-color); }
        .feature-img {
            width: 100%;
            border-radius: var(--border-radius);
            margin: 2rem 0;
            box-shadow: var(--box-shadow);
            border: 5px solid white;
            outline: 1px solid #ddd;
        }
        .internal-link {
            background-color: #eef7ff;
            padding: 0.3rem 0.6rem;
            border-radius: 4px;
            border-left: 4px solid var(--accent-color);
            font-weight: 600;
        }
        .internal-link:hover {
            background-color: #d9ebff;
        }
        .interactive-box {
            background-color: var(--light-color);
            border-radius: var(--border-radius);
            padding: 2rem;
            margin: 2rem 0;
            border: 1px solid #cce0ff;
        }
        .interactive-box h3 {
            margin-top: 0;
            color: var(--primary-color);
        }
        .form-group {
            margin-bottom: 1.5rem;
        }
        .form-group label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
        }
        .form-control {
            width: 100%;
            padding: 0.8rem 1rem;
            border: 1px solid #bbb;
            border-radius: var(--border-radius);
            font-size: 1rem;
            transition: var(--transition);
        }
        .form-control:focus {
            outline: none;
            border-color: var(--primary-color);
            box-shadow: 0 0 0 3px rgba(10, 95, 138, 0.2);
        }
        .btn {
            display: inline-block;
            background: linear-gradient(to right, var(--primary-color), var(--accent-color));
            color: white;
            padding: 0.9rem 2rem;
            border: none;
            border-radius: var(--border-radius);
            font-weight: 700;
            font-size: 1.1rem;
            cursor: pointer;
            transition: var(--transition);
        }
        .btn:hover {
            background: linear-gradient(to right, var(--accent-color), var(--primary-color));
            transform: translateY(-3px);
            box-shadow: 0 7px 15px rgba(0,0,0,0.1);
        }
        .stars {
            display: flex;
            gap: 10px;
            margin: 1rem 0;
            font-size: 1.8rem;
            color: #ffcc00;
        }
        .stars i {
            cursor: pointer;
            transition: var(--transition);
        }
        .stars i:hover {
            transform: scale(1.2);
        }
        .sidebar {
            background-color: var(--light-color);
            border-radius: var(--border-radius);
            padding: 2rem;
            height: fit-content;
            box-shadow: var(--box-shadow);
        }
        .sidebar-widget {
            margin-bottom: 2.5rem;
        }
        .sidebar-widget h3 {
            font-size: 1.5rem;
            margin-bottom: 1rem;
            color: var(--dark-color);
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--accent-color);
        }
        .sidebar-links {
            list-style: none;
        }
        .sidebar-links li {
            margin-bottom: 1rem;
            padding-bottom: 1rem;
            border-bottom: 1px dashed #ccc;
        }
        .sidebar-links li:last-child {
            border-bottom: none;
        }
        .sidebar-links a {
            color: var(--text-color);
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .sidebar-links a:hover {
            color: var(--primary-color);
            gap: 15px;
        }
        .sidebar-links i {
            color: var(--accent-color);
        }
        .update-info {
            background-color: #fff8e1;
            border-left: 5px solid #ffcc00;
            padding: 1.2rem;
            margin: 2rem 0;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
            display: flex;
            align-items: center;
            gap: 15px;
        }
        .update-info i {
            font-size: 2rem;
            color: #ff9800;
        }
        .site-footer {
            background-color: var(--dark-color);
            color: white;
            padding: 3rem 0 1.5rem;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 3rem;
        }
        @media (max-width: 768px) {
            .footer-container {
                grid-template-columns: 1fr;
                gap: 2rem;
            }
        }
        .footer-logo {
            font-size: 2rem;
            font-weight: 900;
            color: white;
            margin-bottom: 1rem;
        }
        .footer-links h4 {
            color: #ffcc00;
            margin-bottom: 1.5rem;
            font-size: 1.3rem;
        }
        .footer-links ul {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 0.8rem;
        }
        .footer-links a {
            color: #ccc;
        }
        .footer-links a:hover {
            color: white;
            padding-left: 5px;
        }
        friend-link {
            display: block;
            background-color: rgba(255,255,255,0.05);
            padding: 1.5rem;
            border-radius: var(--border-radius);
            margin: 1.5rem 0;
            border: 1px solid rgba(255,255,255,0.1);
        }
        friend-link a {
            color: #4fc3f7;
            font-weight: 700;
            font-size: 1.1rem;
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            margin-top: 2rem;
            border-top: 1px solid rgba(255,255,255,0.1);
            color: #aaa;
            font-size: 0.95rem;
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
            .main-nav ul {
                position: fixed;
                top: 70px;
                right: -100%;
                flex-direction: column;
                background-color: var(--dark-color);
                width: 80%;
                height: calc(100vh - 70px);
                padding: 2rem;
                transition: var(--transition);
                box-shadow: -5px 0 15px rgba(0,0,0,0.2);
                z-index: 999;
            }
            .main-nav.active ul {
                right: 0;
            }
            .main-nav a {
                font-size: 1.2rem;
                padding: 1rem 0;
                border-bottom: 1px solid rgba(255,255,255,0.1);
                width: 100%;
            }
            .hero h1 {
                font-size: 2.5rem;
            }
            .hero p {
                font-size: 1.1rem;
            }
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.8rem; }
            h3 { font-size: 1.5rem; }
            h4 { font-size: 1.2rem; }
        }