* { 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%, #e4edf5 100%);
            min-height: 100vh;
        }
        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; }
        .bold { font-weight: 700; }
        .highlight { background-color: #fffacd; padding: 2px 5px; border-radius: 3px; }
        .emoji { font-size: 1.2em; margin-right: 5px; }
        .site-header {
            background: linear-gradient(90deg, #1e3c72 0%, #2a5298 100%);
            color: white;
            padding: 1rem 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: 1.8rem;
            font-weight: 900;
            text-decoration: none;
            color: #ffcc00;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo:hover { color: #fff; transform: scale(1.03); }
        .my-logo i { font-size: 2rem; }
        .nav-desktop {
            display: flex;
            gap: 2rem;
        }
        @media (max-width: 768px) {
            .nav-desktop { display: none; }
        }
        .nav-desktop a {
            color: #e0e0e0;
            text-decoration: none;
            font-weight: 600;
            padding: 0.5rem 1rem;
            border-radius: 5px;
            transition: all 0.3s ease;
        }
        .nav-desktop a:hover {
            background-color: #ffcc00;
            color: #1e3c72;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            color: white;
            cursor: pointer;
            padding: 5px;
        }
        @media (max-width: 768px) {
            .hamburger { display: block; }
        }
        .nav-mobile {
            display: none;
            flex-direction: column;
            background: #2a5298;
            position: absolute;
            top: 100%;
            left: 0;
            width: 100%;
            box-shadow: 0 10px 15px rgba(0,0,0,0.1);
            padding: 1rem;
            z-index: 999;
        }
        .nav-mobile.active { display: flex; }
        .nav-mobile a {
            color: #e0e0e0;
            text-decoration: none;
            padding: 1rem;
            border-bottom: 1px solid #3a6298;
            transition: background 0.3s;
        }
        .nav-mobile a:hover { background-color: #3a6298; color: #ffcc00; }
        .breadcrumb {
            padding: 1rem 0;
            background-color: #f0f8ff;
            border-bottom: 1px solid #d0e7ff;
            font-size: 0.9rem;
        }
        .breadcrumb a {
            color: #2a5298;
            text-decoration: none;
        }
        .breadcrumb a:hover { text-decoration: underline; }
        .search-form {
            display: flex;
            max-width: 500px;
            margin: 2rem auto;
            border: 2px solid #2a5298;
            border-radius: 50px;
            overflow: hidden;
            background: white;
        }
        .search-input {
            flex-grow: 1;
            padding: 15px 20px;
            border: none;
            font-size: 1rem;
            outline: none;
        }
        .search-button {
            background: #2a5298;
            color: white;
            border: none;
            padding: 0 25px;
            cursor: pointer;
            transition: background 0.3s;
        }
        .search-button:hover { background: #ffcc00; color: #1e3c72; }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
            padding: 2rem 0;
        }
        @media (max-width: 992px) {
            .main-content { grid-template-columns: 1fr; }
        }
        .article-content {
            background: white;
            padding: 2.5rem;
            border-radius: 15px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
        }
        .article-content h1 {
            color: #1e3c72;
            font-size: 2.8rem;
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-bottom: 3px solid #ffcc00;
            padding-bottom: 15px;
        }
        .article-content h2 {
            color: #2a5298;
            margin: 2.5rem 0 1rem;
            padding-bottom: 10px;
            border-bottom: 2px dashed #e0e0e0;
        }
        .article-content h3 {
            color: #3a6298;
            margin: 2rem 0 1rem;
        }
        .article-content h4 {
            color: #555;
            margin: 1.5rem 0 0.8rem;
        }
        .article-content p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        .article-content ul, .article-content ol {
            margin: 1.5rem 0 1.5rem 2rem;
        }
        .article-content li { margin-bottom: 0.8rem; }
        .featured-image {
            width: 100%;
            border-radius: 10px;
            margin: 2rem auto;
            border: 5px solid #f0f8ff;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        .insight-box {
            background: #f0f8ff;
            border-left: 5px solid #ffcc00;
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 10px 10px 0;
        }
        .update-time {
            font-style: italic;
            color: #777;
            text-align: right;
            margin-top: 3rem;
            padding-top: 1rem;
            border-top: 1px solid #eee;
        }
        .sidebar {
            background: white;
            padding: 1.5rem;
            border-radius: 15px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
            height: fit-content;
        }
        .sidebar h3 {
            color: #1e3c72;
            margin-bottom: 1.5rem;
            padding-bottom: 10px;
            border-bottom: 2px solid #ffcc00;
        }
        .resource-list { list-style: none; }
        .resource-list li { margin-bottom: 1rem; }
        .resource-list a {
            color: #2a5298;
            text-decoration: none;
            display: block;
            padding: 12px;
            background: #f9f9f9;
            border-radius: 8px;
            transition: all 0.3s;
            border-left: 4px solid transparent;
        }
        .resource-list a:hover {
            background: #eef5ff;
            border-left-color: #ffcc00;
            transform: translateX(5px);
        }
        .interaction-section {
            background: white;
            padding: 2.5rem;
            border-radius: 15px;
            margin: 3rem 0;
            box-shadow: 0 10px 30px rgba(0,0,0,0.08);
        }
        .rating-form, .comment-form {
            margin-top: 2rem;
            padding: 1.5rem;
            background: #f9f9f9;
            border-radius: 10px;
        }
        .stars {
            display: flex;
            gap: 10px;
            margin: 15px 0;
        }
        .star {
            font-size: 2rem;
            color: #ddd;
            cursor: pointer;
            transition: color 0.2s;
        }
        .star:hover,
        .star.active { color: #ffcc00; }
        .form-group {
            margin-bottom: 1.5rem;
        }
        .form-group label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
            color: #444;
        }
        .form-input, .form-textarea {
            width: 100%;
            padding: 12px 15px;
            border: 1px solid #ccc;
            border-radius: 8px;
            font-size: 1rem;
            transition: border 0.3s;
        }
        .form-input:focus, .form-textarea:focus {
            border-color: #2a5298;
            outline: none;
        }
        .submit-btn {
            background: linear-gradient(90deg, #1e3c72, #2a5298);
            color: white;
            border: none;
            padding: 15px 30px;
            border-radius: 8px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s;
        }
        .submit-btn:hover {
            background: linear-gradient(90deg, #ffcc00, #ff9900);
            transform: translateY(-3px);
            box-shadow: 0 7px 14px rgba(255, 204, 0, 0.3);
        }
        .site-footer {
            background: #1a1a2e;
            color: #e0e0e0;
            padding: 3rem 0 1.5rem;
            margin-top: 3rem;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-logo {
            font-size: 1.8rem;
            color: #ffcc00;
            margin-bottom: 1rem;
        }
        .friend-links {
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
            margin: 1.5rem 0;
        }
        friend-link {
            display: inline-block;
            background: #2a5298;
            color: white;
            padding: 8px 15px;
            border-radius: 5px;
            text-decoration: none;
            font-size: 0.9rem;
            transition: background 0.3s;
        }
        friend-link:hover {
            background: #ffcc00;
            color: #1a1a2e;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #333;
            color: #aaa;
            font-size: 0.9rem;
        }