:root {
            --primary-color: #1e40af;
            --secondary-color: #dc2626;
            --accent-color: #f59e0b;
            --text-dark: #1f2937;
            --text-light: #6b7280;
            --bg-light: #f3f4f6;
            --bg-white: #ffffff;
            --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
            --transition: all 0.3s ease;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            color: var(--text-dark);
            background-color: var(--bg-light);
            line-height: 1.6;
            overflow-x: hidden;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }
        ul, ol {
            list-style-position: inside;
            margin-left: 1rem;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background-color: var(--bg-white);
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 20px;
        }
        .my-logo {
            font-size: 2rem;
            font-weight: 800;
            color: var(--primary-color);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo i {
            color: var(--secondary-color);
        }
        .my-logo:hover {
            color: var(--secondary-color);
        }
        .nav-desktop {
            display: flex;
            gap: 30px;
        }
        @media (max-width: 768px) {
            .nav-desktop {
                display: none;
            }
        }
        .nav-desktop a {
            font-weight: 600;
            padding: 5px 0;
            position: relative;
        }
        .nav-desktop a::after {
            content: '';
            position: absolute;
            width: 0;
            height: 2px;
            bottom: 0;
            left: 0;
            background-color: var(--secondary-color);
            transition: width 0.3s;
        }
        .nav-desktop a:hover::after {
            width: 100%;
        }
        .hamburger {
            display: none;
            font-size: 1.5rem;
            background: none;
            border: none;
            cursor: pointer;
            color: var(--primary-color);
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
        }
        .mobile-nav {
            position: fixed;
            top: 70px;
            left: 0;
            width: 100%;
            background-color: var(--bg-white);
            box-shadow: var(--shadow);
            padding: 20px;
            transform: translateY(-100%);
            opacity: 0;
            transition: transform 0.4s ease, opacity 0.4s ease;
            z-index: 999;
        }
        .mobile-nav.active {
            transform: translateY(0);
            opacity: 1;
        }
        .mobile-nav a {
            display: block;
            padding: 12px 0;
            border-bottom: 1px solid #eee;
            font-weight: 600;
        }
        .breadcrumb {
            padding: 15px 20px;
            background-color: #e5e7eb;
            font-size: 0.9rem;
        }
        .breadcrumb a {
            color: var(--primary-color);
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        main {
            padding: 30px 0;
            background-color: var(--bg-white);
        }
        article {
            max-width: 900px;
            margin: 0 auto;
            padding: 0 20px;
        }
        h1 {
            font-size: 2.8rem;
            color: var(--primary-color);
            margin-bottom: 1.5rem;
            line-height: 1.2;
        }
        @media (max-width: 768px) {
            h1 {
                font-size: 2.2rem;
            }
        }
        h2 {
            font-size: 2rem;
            color: var(--secondary-color);
            margin: 2.5rem 0 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--accent-color);
        }
        h3 {
            font-size: 1.6rem;
            color: var(--primary-color);
            margin: 2rem 0 0.8rem;
        }
        h4 {
            font-size: 1.3rem;
            color: var(--text-dark);
            margin: 1.5rem 0 0.5rem;
        }
        p {
            margin-bottom: 1.2rem;
            text-align: justify;
        }
        .lead {
            font-size: 1.2rem;
            color: var(--text-light);
            font-weight: 500;
            margin-bottom: 2rem;
        }
        .highlight {
            background-color: #fef3c7;
            padding: 20px;
            border-left: 5px solid var(--accent-color);
            margin: 2rem 0;
            border-radius: 0 8px 8px 0;
        }
        .feature-img {
            width: 100%;
            max-height: 500px;
            object-fit: cover;
            border-radius: 12px;
            margin: 2.5rem auto;
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
        }
        .interactive-box {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 25px;
            margin: 3rem 0;
        }
        .search-box, .comment-box, .rating-box {
            background-color: var(--bg-light);
            padding: 25px;
            border-radius: 12px;
            box-shadow: var(--shadow);
        }
        .interactive-box h3 {
            margin-top: 0;
            color: var(--secondary-color);
        }
        form {
            display: flex;
            flex-direction: column;
            gap: 15px;
        }
        input, textarea, select {
            padding: 12px 15px;
            border: 1px solid #d1d5db;
            border-radius: 8px;
            font-size: 1rem;
            transition: var(--transition);
        }
        input:focus, textarea:focus, select:focus {
            outline: none;
            border-color: var(--primary-color);
            box-shadow: 0 0 0 3px rgba(30, 64, 175, 0.1);
        }
        button {
            background-color: var(--primary-color);
            color: white;
            border: none;
            padding: 12px 24px;
            border-radius: 8px;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            align-self: flex-start;
        }
        button:hover {
            background-color: var(--secondary-color);
            transform: translateY(-2px);
        }
        .stars {
            display: flex;
            gap: 10px;
            font-size: 1.8rem;
            color: #d1d5db;
            margin-bottom: 15px;
        }
        .stars i {
            cursor: pointer;
            transition: var(--transition);
        }
        .stars i:hover, .stars i.active {
            color: var(--accent-color);
        }
        .related-links {
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
            margin: 2rem 0;
        }
        .related-links a {
            background-color: #e0e7ff;
            color: var(--primary-color);
            padding: 8px 16px;
            border-radius: 50px;
            font-weight: 500;
            border: 1px solid transparent;
        }
        .related-links a:hover {
            background-color: var(--primary-color);
            color: white;
            border-color: var(--primary-color);
        }
        .update-time {
            font-size: 0.9rem;
            color: var(--text-light);
            text-align: right;
            margin-top: 3rem;
            padding-top: 1rem;
            border-top: 1px solid #e5e7eb;
        }
        footer {
            background-color: var(--text-dark);
            color: #d1d5db;
            padding: 40px 0 20px;
        }
        .footer-container {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 30px;
        }
        friend-link {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 20px;
            margin-bottom: 30px;
        }
        friend-link a {
            color: #93c5fd;
            padding: 5px 10px;
            border-radius: 4px;
        }
        friend-link a:hover {
            color: white;
            background-color: rgba(255, 255, 255, 0.1);
        }
        .copyright {
            text-align: center;
            font-size: 0.9rem;
            color: #9ca3af;
            width: 100%;
            padding-top: 20px;
            border-top: 1px solid #374151;
        }