* { margin: 0; padding: 0; box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
            line-height: 1.7;
            color: #333;
            background-color: #f9f9fb;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 15px;
        }
        img { max-width: 100%; height: auto; display: block; }
        .site-header {
            background: linear-gradient(135deg, #1a237e 0%, #4a148c 100%);
            color: white;
            padding: 1.5rem 0;
            margin-bottom: 2rem;
            border-radius: 0 0 12px 12px;
            box-shadow: 0 4px 20px rgba(26, 35, 126, 0.2);
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            padding: 0 1rem;
        }
        .my-logo {
            font-family: 'Trebuchet MS', sans-serif;
            font-size: 2.2rem;
            font-weight: 900;
            text-decoration: none;
            color: #ffeb3b;
            text-shadow: 2px 2px 0 #7b1fa2;
            letter-spacing: -1px;
            transition: all 0.3s ease;
        }
        .my-logo:hover {
            color: #fff;
            text-shadow: 3px 3px 0 #ff5722;
            transform: scale(1.03);
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 0.5rem;
        }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 1.8rem;
        }
        .main-nav a {
            color: #e1f5fe;
            text-decoration: none;
            font-weight: 600;
            padding: 0.5rem 0.8rem;
            border-radius: 6px;
            transition: all 0.3s;
            font-size: 1rem;
        }
        .main-nav a:hover,
        .main-nav a:focus {
            background-color: rgba(255, 255, 255, 0.15);
            color: #ffeb3b;
        }
        .breadcrumb {
            padding: 1rem 1rem 0;
            font-size: 0.9rem;
            color: #757575;
        }
        .breadcrumb a {
            color: #4a148c;
            text-decoration: none;
        }
        .breadcrumb a:hover { text-decoration: underline; }
        .search-container {
            background: #fff;
            padding: 1.5rem;
            border-radius: 10px;
            margin: 1.5rem 0;
            box-shadow: 0 3px 10px rgba(0,0,0,0.08);
        }
        .search-form {
            display: flex;
            max-width: 600px;
            margin: 0 auto;
        }
        .search-input {
            flex-grow: 1;
            padding: 0.9rem 1.2rem;
            border: 2px solid #d1c4e9;
            border-radius: 50px 0 0 50px;
            font-size: 1rem;
            outline: none;
            transition: border 0.3s;
        }
        .search-input:focus { border-color: #7b1fa2; }
        .search-button {
            background: linear-gradient(to right, #7b1fa2, #4527a0);
            color: white;
            border: none;
            padding: 0 1.8rem;
            border-radius: 0 50px 50px 0;
            cursor: pointer;
            font-weight: 600;
            transition: background 0.3s;
        }
        .search-button:hover { background: linear-gradient(to right, #6a1b9a, #311b92); }
        main { background: white; border-radius: 12px; padding: 2rem; margin: 1.5rem 0; box-shadow: 0 5px 15px rgba(0,0,0,0.05); }
        h1 { color: #1a237e; font-size: 2.5rem; margin-bottom: 1.5rem; border-bottom: 3px solid #ffeb3b; padding-bottom: 0.8rem; }
        h2 { color: #4a148c; margin: 2.2rem 0 1rem; font-size: 1.9rem; }
        h3 { color: #6a1b9a; margin: 1.8rem 0 0.8rem; font-size: 1.5rem; }
        h4 { color: #8e24aa; margin: 1.5rem 0 0.6rem; font-size: 1.2rem; }
        p { margin-bottom: 1.3rem; font-size: 1.05rem; color: #444; }
        .intro { font-size: 1.2rem; color: #555; background: #f3e5f5; padding: 1.5rem; border-left: 5px solid #7b1fa2; border-radius: 5px; margin-bottom: 2rem; }
        .highlight { background-color: #fff9c4; padding: 0.2rem 0.4rem; border-radius: 3px; font-weight: 600; }
        .emoji { font-size: 1.2em; margin-right: 0.3rem; }
        .article-img {
            float: right;
            margin: 0 0 1.5rem 2rem;
            width: 45%;
            border-radius: 10px;
            box-shadow: 0 8px 16px rgba(0,0,0,0.1);
            border: 5px solid #fff;
        }
        @media (max-width: 768px) {
            .article-img { float: none; width: 100%; margin: 1rem 0; }
        }
        .content-link {
            color: #7b1fa2;
            text-decoration: none;
            font-weight: 600;
            border-bottom: 1px dashed #ba68c8;
            transition: all 0.2s;
        }
        .content-link:hover {
            color: #ff5722;
            border-bottom-style: solid;
        }
        .related-links {
            background: #e8eaf6;
            padding: 1.5rem;
            border-radius: 10px;
            margin: 2rem 0;
        }
        .related-links h3 { margin-top: 0; }
        .related-links ul { list-style-position: inside; color: #5c6bc0; }
        .related-links li { margin-bottom: 0.5rem; }
        .update-time {
            font-style: italic;
            color: #777;
            text-align: right;
            padding-top: 1rem;
            border-top: 1px dashed #ccc;
            margin-top: 2rem;
        }
        .interactive-section {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
            margin: 3rem 0;
        }
        .comment-box, .rating-box {
            background: #f5f5f5;
            padding: 1.8rem;
            border-radius: 10px;
            border: 1px solid #e0e0e0;
        }
        .interactive-section h3 { margin-top: 0; }
        .form-group { margin-bottom: 1.2rem; }
        label { display: block; margin-bottom: 0.5rem; font-weight: 600; color: #555; }
        input, textarea, select {
            width: 100%;
            padding: 0.8rem;
            border: 1px solid #bdbdbd;
            border-radius: 6px;
            font-family: inherit;
            font-size: 1rem;
        }
        textarea { min-height: 120px; resize: vertical; }
        .submit-btn {
            background: #388e3c;
            color: white;
            border: none;
            padding: 0.9rem 1.8rem;
            border-radius: 6px;
            cursor: pointer;
            font-weight: bold;
            transition: background 0.3s;
        }
        .submit-btn:hover { background: #2e7d32; }
        .star-rating {
            direction: rtl;
            display: inline-block;
            font-size: 2rem;
        }
        .star-rating input { display: none; }
        .star-rating label {
            color: #ccc;
            cursor: pointer;
            padding: 0 0.1rem;
        }
        .star-rating input:checked ~ label,
        .star-rating label:hover,
        .star-rating label:hover ~ label { color: #ffc107; }
        footer {
            background: #1a237e;
            color: #e8eaf6;
            padding: 2.5rem 1rem;
            border-radius: 12px 12px 0 0;
            margin-top: 3rem;
        }
        .footer-content {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 2rem;
        }
        .footer-section { flex: 1; min-width: 250px; }
        .footer-section h3 {
            color: #ffeb3b;
            margin-bottom: 1.2rem;
            font-size: 1.3rem;
        }
        friend-link {
            display: block;
            margin-bottom: 0.7rem;
        }
        friend-link a {
            color: #c5cae9;
            text-decoration: none;
            transition: color 0.3s;
        }
        friend-link a:hover { color: #ffeb3b; text-decoration: underline; }
        .copyright {
            text-align: center;
            margin-top: 2rem;
            padding-top: 1.5rem;
            border-top: 1px solid #3949ab;
            font-size: 0.9rem;
            color: #9fa8da;
        }
        @media (max-width: 768px) {
            .hamburger { display: block; }
            .main-nav ul {
                display: none;
                flex-direction: column;
                width: 100%;
                background: #311b92;
                position: absolute;
                top: 100%;
                left: 0;
                padding: 1rem;
                border-radius: 0 0 12px 12px;
                z-index: 1000;
            }
            .main-nav.active ul { display: flex; }
            .header-container { padding: 0 1rem; }
            h1 { font-size: 2rem; }
            h2 { font-size: 1.6rem; }
            .interactive-section { grid-template-columns: 1fr; }
        }