:root {
            --primary-blue: #1e3a8a;
            --secondary-gold: #fbbf24;
            --accent-red: #dc2626;
            --light-bg: #f8fafc;
            --dark-text: #1f2937;
            --gray-text: #6b7280;
            --border-color: #e5e7eb;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.12);
            --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1);
            --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1);
            --transition: all 0.3s ease;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        body {
            background-color: var(--light-bg);
            color: var(--dark-text);
            line-height: 1.6;
            overflow-x: hidden;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition);
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background-color: white;
            box-shadow: var(--shadow-md);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-top {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 0;
            border-bottom: 1px solid var(--border-color);
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--primary-blue);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo i {
            color: var(--accent-red);
        }
        .my-logo:hover {
            color: var(--accent-red);
        }
        .search-box {
            display: flex;
            flex: 0 1 400px;
        }
        .search-box input {
            flex: 1;
            padding: 12px 15px;
            border: 2px solid var(--border-color);
            border-radius: 50px 0 0 50px;
            font-size: 1rem;
            outline: none;
        }
        .search-box input:focus {
            border-color: var(--primary-blue);
        }
        .search-box button {
            background-color: var(--primary-blue);
            color: white;
            border: none;
            padding: 0 25px;
            border-radius: 0 50px 50px 0;
            cursor: pointer;
            font-weight: 600;
            transition: var(--transition);
        }
        .search-box button:hover {
            background-color: var(--accent-red);
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            cursor: pointer;
            color: var(--primary-blue);
        }
        nav {
            padding: 15px 0;
        }
        .nav-menu {
            display: flex;
            list-style: none;
            gap: 30px;
            justify-content: center;
        }
        .nav-menu a {
            font-weight: 600;
            color: var(--dark-text);
            padding: 8px 0;
            position: relative;
        }
        .nav-menu a:hover {
            color: var(--primary-blue);
        }
        .nav-menu a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 3px;
            background-color: var(--secondary-gold);
            transition: width 0.3s;
        }
        .nav-menu a:hover::after {
            width: 100%;
        }
        .breadcrumb {
            padding: 15px 0;
            font-size: 0.9rem;
            color: var(--gray-text);
        }
        .breadcrumb a {
            color: var(--primary-blue);
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        main {
            padding: 30px 0;
        }
        article {
            background-color: white;
            border-radius: 12px;
            padding: 40px;
            box-shadow: var(--shadow-md);
            margin-bottom: 40px;
        }
        h1 {
            font-size: 2.8rem;
            color: var(--primary-blue);
            margin-bottom: 20px;
            line-height: 1.2;
            text-align: center;
        }
        .article-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-bottom: 25px;
            margin-bottom: 25px;
            border-bottom: 1px solid var(--border-color);
            flex-wrap: wrap;
            gap: 15px;
            color: var(--gray-text);
            font-size: 0.95rem;
        }
        .update-time {
            background-color: #fef3c7;
            color: #92400e;
            padding: 6px 12px;
            border-radius: 20px;
            font-weight: 600;
        }
        h2 {
            font-size: 2rem;
            color: var(--primary-blue);
            margin: 35px 0 15px;
            padding-bottom: 10px;
            border-bottom: 2px dashed var(--secondary-gold);
        }
        h3 {
            font-size: 1.6rem;
            color: var(--dark-text);
            margin: 25px 0 12px;
        }
        h4 {
            font-size: 1.3rem;
            color: var(--gray-text);
            margin: 20px 0 10px;
        }
        p {
            margin-bottom: 18px;
            text-align: justify;
        }
        .lead {
            font-size: 1.3rem;
            font-weight: 600;
            color: var(--primary-blue);
            background-color: #eff6ff;
            padding: 20px;
            border-left: 5px solid var(--secondary-gold);
            border-radius: 0 8px 8px 0;
            margin: 25px 0;
        }
        .highlight {
            background-color: #fef3c7;
            padding: 3px 6px;
            border-radius: 4px;
            font-weight: 600;
        }
        .content-img {
            width: 100%;
            max-width: 800px;
            height: auto;
            border-radius: 12px;
            margin: 25px auto;
            display: block;
            box-shadow: var(--shadow-lg);
        }
        .quote {
            font-style: italic;
            padding: 25px;
            background-color: #f8fafc;
            border-left: 4px solid var(--accent-red);
            margin: 25px 0;
            border-radius: 0 8px 8px 0;
        }
        .quote-author {
            text-align: right;
            font-weight: 600;
            color: var(--primary-blue);
            margin-top: 10px;
        }
        .strategy-box {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 20px;
            margin: 30px 0;
        }
        .strategy-card {
            background-color: #f0f9ff;
            border: 1px solid #bae6fd;
            border-radius: 10px;
            padding: 20px;
            transition: var(--transition);
        }
        .strategy-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-md);
        }
        .strategy-card h4 {
            color: var(--primary-blue);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .interactive-section {
            background: linear-gradient(135deg, #f0f9ff 0%, #fef3c7 100%);
            border-radius: 12px;
            padding: 30px;
            margin: 40px 0;
            border: 2px dashed var(--primary-blue);
        }
        .rating-form, .comment-form {
            margin-top: 20px;
        }
        .stars {
            display: flex;
            gap: 10px;
            margin: 15px 0;
            font-size: 1.8rem;
            color: #d1d5db;
            cursor: pointer;
        }
        .stars .active {
            color: var(--secondary-gold);
        }
        .form-group {
            margin-bottom: 20px;
        }
        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
            color: var(--dark-text);
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 12px 15px;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            font-size: 1rem;
            transition: var(--transition);
        }
        .form-group input:focus,
        .form-group textarea:focus {
            border-color: var(--primary-blue);
            outline: none;
            box-shadow: 0 0 0 3px rgba(30, 58, 138, 0.1);
        }
        .btn {
            display: inline-block;
            background-color: var(--primary-blue);
            color: white;
            padding: 12px 28px;
            border-radius: 8px;
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            font-size: 1rem;
        }
        .btn:hover {
            background-color: var(--accent-red);
            transform: scale(1.03);
        }
        .btn-block {
            width: 100%;
        }
        footer {
            background-color: var(--primary-blue);
            color: white;
            padding: 40px 0 20px;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 30px;
            margin-bottom: 30px;
        }
        .footer-section h3 {
            color: white;
            margin-bottom: 20px;
            font-size: 1.5rem;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 10px;
        }
        .footer-links a {
            color: #dbeafe;
        }
        .footer-links a:hover {
            color: var(--secondary-gold);
            padding-left: 5px;
        }
        friend-link {
            display: block;
            background-color: rgba(255, 255, 255, 0.1);
            padding: 15px;
            border-radius: 8px;
            margin-bottom: 15px;
            text-align: center;
            font-weight: 600;
        }
        friend-link a {
            color: white;
        }
        friend-link a:hover {
            color: var(--secondary-gold);
        }
        .copyright {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.2);
            color: #dbeafe;
            font-size: 0.9rem;
        }
        @media (max-width: 992px) {
            h1 {
                font-size: 2.3rem;
            }
            .strategy-box {
                grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            }
        }
        @media (max-width: 768px) {
            .header-top {
                flex-wrap: wrap;
                gap: 15px;
            }
            .search-box {
                order: 3;
                flex: 1 0 100%;
                margin-top: 10px;
            }
            .hamburger {
                display: block;
            }
            .nav-menu {
                flex-direction: column;
                gap: 0;
                max-height: 0;
                overflow: hidden;
                transition: max-height 0.5s ease;
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background-color: white;
                box-shadow: var(--shadow-md);
            }
            .nav-menu.active {
                max-height: 500px;
                padding: 20px 0;
            }
            .nav-menu li {
                text-align: center;
                padding: 12px 0;
                border-bottom: 1px solid var(--border-color);
            }
            article {
                padding: 25px;
            }
            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.7rem;
            }
        }
        @media (max-width: 480px) {
            .article-meta {
                flex-direction: column;
                align-items: flex-start;
            }
            h1 {
                font-size: 1.8rem;
            }
            .interactive-section {
                padding: 20px;
            }
        }