* { 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: #333;
            background: linear-gradient(135deg, #f5f7fa 0%, #e4e8f0 100%);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        a { text-decoration: none; color: #2c5aa0; transition: color 0.3s ease; }
        a:hover { color: #e63946; }
        img { max-width: 100%; height: auto; display: block; }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: linear-gradient(to right, #1e3c72, #2a5298);
            color: white;
            padding: 1.5rem 0;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 800;
            background: linear-gradient(90deg, #f7ef8a, #e63946);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            letter-spacing: 1px;
        }
        .my-logo:hover { opacity: 0.9; }
        .breadcrumb {
            padding: 1rem 0;
            background: #e9ecef;
            font-size: 0.9rem;
        }
        .breadcrumb a { color: #555; }
        .breadcrumb a:hover { color: #1e3c72; }
        .breadcrumb span { color: #777; }
        .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::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 3px;
            background: #e63946;
            transition: width 0.3s ease;
        }
        .main-nav a:hover::after { width: 100%; }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            color: white;
            cursor: pointer;
        }
        .hero {
            background: url('https://images.unsplash.com/photo-1504851149312-7a075b496cc7?ixlib=rb-4.0.3&auto=format&fit=crop&w=1200&q=80') no-repeat center center/cover;
            color: white;
            text-align: center;
            padding: 6rem 2rem;
            margin-bottom: 3rem;
            border-radius: 0 0 20px 20px;
            position: relative;
        }
        .hero::before {
            content: '';
            position: absolute;
            top:0; left:0; right:0; bottom:0;
            background: rgba(0,0,0,0.6);
            border-radius: 0 0 20px 20px;
        }
        .hero-content { position: relative; z-index: 2; }
        .hero h1 {
            font-size: 3.5rem;
            margin-bottom: 1.5rem;
            text-shadow: 2px 2px 5px rgba(0,0,0,0.7);
        }
        .hero p {
            font-size: 1.4rem;
            max-width: 800px;
            margin: 0 auto 2rem;
        }
        .search-container {
            max-width: 700px;
            margin: 2rem auto;
            background: white;
            padding: 1.5rem;
            border-radius: 12px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.08);
        }
        .search-form {
            display: flex;
        }
        .search-input {
            flex-grow: 1;
            padding: 1rem 1.5rem;
            border: 2px solid #ddd;
            border-radius: 50px 0 0 50px;
            font-size: 1.1rem;
            outline: none;
        }
        .search-input:focus { border-color: #2a5298; }
        .search-btn {
            background: linear-gradient(to right, #2a5298, #1e3c72);
            color: white;
            border: none;
            padding: 0 2rem;
            border-radius: 0 50px 50px 0;
            cursor: pointer;
            font-size: 1.1rem;
            font-weight: 600;
            transition: opacity 0.3s;
        }
        .search-btn:hover { opacity: 0.9; }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
            padding: 2rem 0;
        }
        .article-content {
            background: white;
            padding: 3rem;
            border-radius: 15px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.05);
        }
        .sidebar {
            background: white;
            padding: 2rem;
            border-radius: 15px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.05);
            align-self: start;
            position: sticky;
            top: 120px;
        }
        h1 { font-size: 2.8rem; color: #1e3c72; margin-bottom: 1.5rem; }
        h2 { font-size: 2.2rem; color: #2a5298; margin: 2.5rem 0 1.2rem; padding-bottom: 0.5rem; border-bottom: 3px solid #e63946; }
        h3 { font-size: 1.8rem; color: #333; margin: 2rem 0 1rem; }
        h4 { font-size: 1.4rem; color: #555; margin: 1.5rem 0 0.8rem; }
        p { margin-bottom: 1.5rem; font-size: 1.15rem; text-align: justify; }
        .lead { font-size: 1.3rem; font-weight: 500; color: #444; background: #f8f9fa; padding: 1.5rem; border-left: 5px solid #2a5298; border-radius: 0 8px 8px 0; }
        .highlight { background: #fffacd; padding: 0.2rem 0.5rem; border-radius: 3px; font-weight: 600; }
        .emoji { font-size: 1.2em; margin-right: 0.3rem; }
        .feature-img {
            width: 100%;
            border-radius: 12px;
            margin: 2.5rem auto;
            box-shadow: 0 8px 20px rgba(0,0,0,0.15);
            border: 5px solid white;
        }
        .update-time {
            font-style: italic;
            color: #777;
            text-align: right;
            margin-top: 3rem;
            padding-top: 1rem;
            border-top: 1px dashed #ccc;
        }
        .interaction-section {
            background: #f8f9fa;
            padding: 2.5rem;
            border-radius: 15px;
            margin-top: 3rem;
        }
        .interaction-section h3 { border-bottom: none; color: #1e3c72; }
        .rating-form, .comment-form {
            display: flex;
            flex-direction: column;
            gap: 1.5rem;
            margin-top: 1.5rem;
        }
        .star-rating {
            display: flex;
            gap: 0.5rem;
            font-size: 2rem;
            color: #ffd700;
            cursor: pointer;
        }
        .star-rating .star:hover { color: #ffcc00; }
        .form-group { display: flex; flex-direction: column; gap: 0.5rem; }
        .form-group label { font-weight: 600; color: #444; }
        .form-input, .form-textarea {
            padding: 1rem;
            border: 2px solid #ddd;
            border-radius: 8px;
            font-size: 1rem;
            font-family: inherit;
        }
        .form-input:focus, .form-textarea:focus { border-color: #2a5298; outline: none; }
        .submit-btn {
            align-self: flex-start;
            background: linear-gradient(to right, #e63946, #d62839);
            color: white;
            border: none;
            padding: 1rem 2.5rem;
            border-radius: 50px;
            cursor: pointer;
            font-size: 1.1rem;
            font-weight: 600;
            transition: transform 0.2s;
        }
        .submit-btn:hover { transform: translateY(-3px); }
        .related-links h3 { font-size: 1.5rem; margin-top: 0; }
        .related-links ul { list-style: none; }
        .related-links li { margin-bottom: 1rem; }
        .related-links a {
            display: block;
            padding: 0.8rem 1rem;
            background: #f1f5fd;
            border-radius: 8px;
            border-left: 4px solid #2a5298;
            transition: all 0.3s;
        }
        .related-links a:hover {
            background: #2a5298;
            color: white;
            transform: translateX(5px);
        }
        .site-footer {
            background: #1a1a2e;
            color: #ccc;
            padding: 3rem 0 1.5rem;
            margin-top: auto;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2.5rem;
            margin-bottom: 2rem;
        }
        .footer-section h3 {
            color: #fff;
            margin-bottom: 1.5rem;
            font-size: 1.5rem;
            border-bottom: 2px solid #e63946;
            padding-bottom: 0.5rem;
        }
        friend-link {
            display: block;
            padding: 0.5rem 0;
            color: #a3c4ff;
        }
        friend-link:hover { color: white; text-decoration: underline; }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #333;
            font-size: 0.9rem;
            color: #888;
        }
        @media (max-width: 992px) {
            .main-content { grid-template-columns: 1fr; }
            .sidebar { position: static; }
        }
        @media (max-width: 768px) {
            .hamburger { display: block; }
            .main-nav {
                position: fixed;
                top: 90px;
                left: 0;
                width: 100%;
                background: #1e3c72;
                clip-path: polygon(0 0, 100% 0, 100% 0, 0 0);
                transition: clip-path 0.4s ease-in-out;
                padding: 2rem;
                box-shadow: 0 10px 15px rgba(0,0,0,0.1);
            }
            .main-nav.active {
                clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%);
            }
            .main-nav ul {
                flex-direction: column;
                gap: 1.5rem;
            }
            .hero h1 { font-size: 2.5rem; }
            .hero p { font-size: 1.2rem; }
            .search-form { flex-direction: column; }
            .search-input, .search-btn { border-radius: 50px; width: 100%; }
            .search-btn { margin-top: 1rem; padding: 1rem; }
            .article-content { padding: 2rem; }
            h1 { font-size: 2.3rem; }
            h2 { font-size: 1.9rem; }
        }