:root {
            --primary-dark: #1a365d;
            --primary: #2d4b8c;
            --accent: #d4af37;
            --light-bg: #f8f9fa;
            --dark-text: #2d3748;
            --light-text: #718096;
            --border-color: #e2e8f0;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: var(--dark-text);
            background-color: #fff;
            max-width: 100vw;
            overflow-x: hidden;
        }
        .site-header {
            background: linear-gradient(135deg, var(--primary-dark), var(--primary));
            color: white;
            padding: 1rem 5%;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: var(--shadow);
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 800;
            color: white;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo i {
            color: var(--accent);
        }
        .my-logo span {
            background: linear-gradient(90deg, #fff, var(--accent));
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }
        .breadcrumb {
            padding: 0.8rem 5%;
            background-color: var(--light-bg);
            font-size: 0.9rem;
            border-bottom: 1px solid var(--border-color);
        }
        .breadcrumb a {
            color: var(--primary);
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .main-nav {
            display: flex;
            gap: 2rem;
        }
        .main-nav a {
            color: white;
            text-decoration: none;
            font-weight: 600;
            padding: 0.5rem 1rem;
            border-radius: 4px;
            transition: all 0.3s ease;
        }
        .main-nav a:hover,
        .main-nav a:focus {
            background-color: rgba(255, 255, 255, 0.15);
            transform: translateY(-2px);
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            color: white;
            cursor: pointer;
        }
        .search-container {
            max-width: 600px;
            margin: 2.5rem auto;
            padding: 0 5%;
        }
        .search-form {
            display: flex;
            border-radius: 50px;
            overflow: hidden;
            box-shadow: var(--shadow);
        }
        .search-input {
            flex-grow: 1;
            padding: 1rem 1.5rem;
            border: none;
            font-size: 1rem;
        }
        .search-btn {
            background-color: var(--primary);
            color: white;
            border: none;
            padding: 1rem 2rem;
            cursor: pointer;
            font-weight: 600;
            transition: background 0.3s;
        }
        .search-btn:hover {
            background-color: var(--primary-dark);
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 5%;
        }
        main {
            padding: 3rem 0;
        }
        article {
            background: white;
            border-radius: 12px;
            padding: 3rem;
            box-shadow: var(--shadow);
            margin-bottom: 3rem;
        }
        h1 {
            font-size: 3.2rem;
            color: var(--primary-dark);
            margin-bottom: 1.5rem;
            line-height: 1.2;
        }
        h2 {
            font-size: 2.2rem;
            color: var(--primary);
            margin: 2.5rem 0 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 3px solid var(--accent);
        }
        h3 {
            font-size: 1.8rem;
            color: var(--primary-dark);
            margin: 2rem 0 1rem;
        }
        h4 {
            font-size: 1.4rem;
            color: var(--dark-text);
            margin: 1.5rem 0 0.8rem;
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        .lead {
            font-size: 1.3rem;
            color: var(--light-text);
            font-weight: 500;
            margin-bottom: 2rem;
        }
        .highlight {
            background-color: #fff8e1;
            border-left: 5px solid var(--accent);
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 8px 8px 0;
        }
        .featured-image {
            width: 100%;
            max-width: 800px;
            height: auto;
            border-radius: 12px;
            margin: 2.5rem auto;
            display: block;
            box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color 0.3s;
        }
        a:hover {
            color: var(--primary-dark);
            text-decoration: underline;
        }
        .content-links {
            display: inline-block;
            padding: 0.2rem 0.5rem;
            border-radius: 4px;
        }
        .interactive-section {
            background-color: var(--light-bg);
            padding: 2.5rem;
            border-radius: 12px;
            margin: 3rem 0;
            border: 1px solid var(--border-color);
        }
        .rating-section,
        .comment-section {
            margin-top: 2rem;
        }
        .star-rating {
            display: flex;
            gap: 0.5rem;
            margin: 1rem 0;
        }
        .star-rating i {
            color: #ccc;
            cursor: pointer;
            font-size: 1.8rem;
            transition: color 0.2s;
        }
        .star-rating i:hover,
        .star-rating i.active {
            color: #ffc107;
        }
        textarea, input[type="text"], input[type="email"] {
            width: 100%;
            padding: 1rem;
            margin-bottom: 1rem;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            font-family: inherit;
        }
        button[type="submit"] {
            background-color: var(--primary);
            color: white;
            padding: 1rem 2rem;
            border: none;
            border-radius: 8px;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.3s;
        }
        button[type="submit"]:hover {
            background-color: var(--primary-dark);
        }
        footer {
            background-color: var(--primary-dark);
            color: white;
            padding: 3rem 5%;
            margin-top: 4rem;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-links a {
            color: #cbd5e0;
            display: block;
            margin-bottom: 0.8rem;
        }
        friend-link {
            display: inline-block;
            background-color: rgba(255, 255, 255, 0.1);
            padding: 0.8rem 1.5rem;
            margin: 0.5rem;
            border-radius: 6px;
            transition: transform 0.3s;
        }
        friend-link:hover {
            transform: translateY(-3px);
            background-color: rgba(255, 255, 255, 0.2);
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            color: #a0aec0;
            font-size: 0.9rem;
        }
        .update-time {
            font-style: italic;
            color: var(--light-text);
            margin-top: 2rem;
            text-align: right;
            font-size: 0.9rem;
        }
        @media (max-width: 992px) {
            h1 { font-size: 2.8rem; }
            h2 { font-size: 2rem; }
            article { padding: 2rem; }
        }
        @media (max-width: 768px) {
            .header-container {
                flex-direction: column;
                align-items: flex-start;
            }
            .main-nav {
                flex-direction: column;
                width: 100%;
                display: none;
                margin-top: 1rem;
            }
            .main-nav.active {
                display: flex;
            }
            .hamburger {
                display: block;
                position: absolute;
                top: 1.5rem;
                right: 5%;
            }
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.8rem; }
            .interactive-section {
                padding: 1.5rem;
            }
        }
        @media (max-width: 480px) {
            .container {
                padding: 0 3%;
            }
            article {
                padding: 1.5rem;
            }
            .search-form {
                flex-direction: column;
                border-radius: 12px;
            }
            .search-input, .search-btn {
                border-radius: 0;
                width: 100%;
            }
        }