* { 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-color: #f8f9fa;
            max-width: 100vw;
            overflow-x: hidden;
        }
        a { text-decoration: none; color: inherit; transition: color 0.3s ease; }
        img { max-width: 100%; height: auto; display: block; }
        ul, ol { padding-left: 1.5rem; margin: 1rem 0; }
        li { margin-bottom: 0.5rem; }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        .text-center { text-align: center; }
        .bold { font-weight: 700; }
        .italic { font-style: italic; }
        .underline { text-decoration: underline; }
        .highlight { background-color: #fffacd; padding: 0 4px; }
        .emoji { font-size: 1.2em; margin-right: 5px; }
        .site-header {
            background: linear-gradient(135deg, #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-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-size: 2rem;
            font-weight: 900;
            color: #ffcc00;
            text-transform: uppercase;
            letter-spacing: 1px;
        }
        .my-logo:hover { color: #fff; }
        .nav-desktop { display: flex; gap: 2rem; }
        .nav-desktop a {
            font-weight: 600;
            padding: 0.5rem 0;
            position: relative;
        }
        .nav-desktop a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: #ffcc00;
            transition: width 0.3s ease;
        }
        .nav-desktop a:hover::after { width: 100%; }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            color: white;
            cursor: pointer;
        }
        .nav-mobile {
            display: none;
            flex-direction: column;
            background: #2a5298;
            position: absolute;
            top: 100%;
            left: 0;
            width: 100%;
            padding: 1rem;
            box-shadow: 0 5px 10px rgba(0,0,0,0.2);
        }
        .nav-mobile.active { display: flex; }
        .nav-mobile a {
            padding: 1rem;
            border-bottom: 1px solid rgba(255,255,255,0.1);
        }
        .nav-mobile a:hover { background: rgba(255,255,255,0.1); }
        .breadcrumb {
            padding: 1rem 1.5rem;
            background: #e9ecef;
            font-size: 0.9rem;
        }
        .breadcrumb a { color: #1e3c72; }
        .breadcrumb a:hover { text-decoration: underline; }
        .breadcrumb span { color: #666; }
        .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;
            border-radius: 12px;
            padding: 2.5rem;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        .last-updated {
            font-size: 0.9rem;
            color: #666;
            margin-bottom: 1.5rem;
            padding-bottom: 1rem;
            border-bottom: 1px dashed #ddd;
        }
        .article-heading {
            color: #1e3c72;
            margin-bottom: 1.5rem;
            line-height: 1.2;
        }
        .article-heading h1 { font-size: 2.8rem; margin-bottom: 1rem; }
        .article-heading h2 { font-size: 2rem; margin: 2rem 0 1rem; color: #2a5298; border-left: 5px solid #ffcc00; padding-left: 1rem; }
        .article-heading h3 { font-size: 1.6rem; margin: 1.8rem 0 0.8rem; color: #3a6bc8; }
        .article-heading h4 { font-size: 1.3rem; margin: 1.5rem 0 0.6rem; color: #555; }
        .intro-paragraph {
            font-size: 1.2rem;
            color: #444;
            margin-bottom: 2rem;
            padding: 1rem;
            background: #f0f8ff;
            border-radius: 8px;
            border-left: 4px solid #2a5298;
        }
        .content-paragraph {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        .featured-image {
            margin: 2rem 0;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 8px 20px rgba(0,0,0,0.1);
        }
        .tip-box {
            background: linear-gradient(to right, #e3f2fd, #f3e5f5);
            border-left: 6px solid #9c27b0;
            padding: 1.5rem;
            margin: 1.5rem 0;
            border-radius: 0 8px 8px 0;
        }
        .pro-tip {
            background: #fffde7;
            border: 2px solid #ffd600;
            padding: 1.5rem;
            border-radius: 10px;
            margin: 1.5rem 0;
        }
        .pro-tip h4 { color: #f57c00; }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 2rem;
        }
        .sidebar-widget {
            background: white;
            padding: 1.5rem;
            border-radius: 10px;
            box-shadow: 0 5px 10px rgba(0,0,0,0.05);
        }
        .sidebar-widget h3 {
            color: #1e3c72;
            margin-bottom: 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #ffcc00;
        }
        .search-form, .comment-form, .rating-form {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }
        .form-input, .form-textarea {
            padding: 0.8rem;
            border: 1px solid #ccc;
            border-radius: 6px;
            font-size: 1rem;
            width: 100%;
        }
        .form-textarea { min-height: 100px; resize: vertical; }
        .form-button {
            background: linear-gradient(to right, #1e3c72, #2a5298);
            color: white;
            border: none;
            padding: 0.9rem;
            border-radius: 6px;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.3s ease, transform 0.2s;
        }
        .form-button:hover {
            background: linear-gradient(to right, #2a5298, #3a6bc8);
            transform: translateY(-2px);
        }
        .star-rating {
            display: flex;
            justify-content: center;
            gap: 0.5rem;
            font-size: 1.8rem;
            color: #ddd;
            margin: 0.5rem 0;
        }
        .star-rating label { cursor: pointer; }
        .star-rating input { display: none; }
        .star-rating label:hover,
        .star-rating label:hover ~ label { color: #ffcc00; }
        .star-rating input:checked ~ label { color: #ffcc00; }
        .site-footer {
            background: #1a1a2e;
            color: #ccc;
            padding: 3rem 0 1.5rem;
            margin-top: 3rem;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-section h4 {
            color: #ffcc00;
            margin-bottom: 1.2rem;
            font-size: 1.2rem;
        }
        .footer-links a {
            display: block;
            margin-bottom: 0.7rem;
            color: #aaa;
        }
        .footer-links a:hover { color: #ffcc00; }
        friend-link {
            display: inline-block;
            background: rgba(255,255,255,0.05);
            padding: 0.5rem 1rem;
            margin: 0.3rem;
            border-radius: 4px;
            border: 1px solid #444;
            font-size: 0.9rem;
        }
        friend-link a { color: #4da6ff; }
        friend-link a:hover { color: #80c1ff; }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #444;
            font-size: 0.9rem;
            color: #888;
        }
        @media (max-width: 768px) {
            .nav-desktop { display: none; }
            .hamburger { display: block; }
            .article-heading h1 { font-size: 2.2rem; }
            .article-heading h2 { font-size: 1.8rem; }
            .article-content { padding: 1.5rem; }
            .main-content { gap: 2rem; }
        }