* { 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%);
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 20px;
        }
        img { max-width: 100%; height: auto; display: block; }
        .site-header {
            background: linear-gradient(to right, #1a2980, #26d0ce);
            color: white;
            padding: 1.5rem 0;
            border-radius: 0 0 15px 15px;
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
            margin-bottom: 2rem;
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            padding: 0 1rem;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 900;
            text-decoration: none;
            color: white;
            display: flex;
            align-items: center;
            gap: 10px;
            transition: transform 0.3s;
        }
        .my-logo:hover {
            transform: scale(1.05);
        }
        .my-logo i { color: #FFD700; }
        .breadcrumb {
            padding: 1rem;
            background-color: #f1f8ff;
            border-radius: 8px;
            margin: 1rem 0;
            font-size: 0.9rem;
        }
        .breadcrumb a { color: #1a2980; text-decoration: none; }
        .breadcrumb a:hover { text-decoration: underline; }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 1.8rem;
            flex-wrap: wrap;
        }
        .main-nav a {
            color: white;
            text-decoration: none;
            font-weight: 600;
            padding: 0.5rem 0.8rem;
            border-radius: 6px;
            transition: all 0.3s;
            border: 2px solid transparent;
        }
        .main-nav a:hover,
        .main-nav a:focus {
            background-color: rgba(255, 255, 255, 0.2);
            border-color: #FFD700;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            color: white;
            cursor: pointer;
            padding: 0.5rem;
        }
        .search-container {
            background: white;
            padding: 2rem;
            border-radius: 12px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            margin: 2rem 0;
            text-align: center;
        }
        .search-form {
            display: flex;
            max-width: 600px;
            margin: 0 auto;
        }
        .search-input {
            flex-grow: 1;
            padding: 15px;
            border: 2px solid #26d0ce;
            border-radius: 8px 0 0 8px;
            font-size: 1rem;
        }
        .search-btn {
            background: linear-gradient(to right, #1a2980, #26d0ce);
            color: white;
            border: none;
            padding: 0 25px;
            border-radius: 0 8px 8px 0;
            cursor: pointer;
            font-size: 1rem;
            transition: opacity 0.3s;
        }
        .search-btn:hover { opacity: 0.9; }
        .content-wrapper {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2.5rem;
            margin: 2rem 0;
        }
        @media (max-width: 1024px) {
            .content-wrapper { grid-template-columns: 1fr; }
        }
        main {
            background: white;
            padding: 2.5rem;
            border-radius: 15px;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.06);
        }
        article h1 {
            color: #1a2980;
            font-size: 2.8rem;
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-bottom: 4px solid #FFD700;
            padding-bottom: 15px;
        }
        article h2 {
            color: #26d0ce;
            font-size: 2rem;
            margin: 2.5rem 0 1.2rem;
            padding-left: 10px;
            border-left: 5px solid #1a2980;
        }
        article h3 {
            color: #1a2980;
            font-size: 1.6rem;
            margin: 2rem 0 1rem;
        }
        article h4 {
            color: #555;
            font-size: 1.3rem;
            margin: 1.5rem 0 0.8rem;
        }
        article p {
            margin-bottom: 1.5rem;
            text-align: justify;
            font-size: 1.1rem;
        }
        .highlight-box {
            background: #f0f9ff;
            border-left: 5px solid #1a2980;
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 10px 10px 0;
        }
        .feature-img {
            width: 100%;
            border-radius: 12px;
            margin: 2rem auto;
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
            border: 5px solid white;
        }
        .internal-link {
            color: #1a2980;
            text-decoration: none;
            font-weight: 600;
            border-bottom: 2px dotted #26d0ce;
            transition: all 0.3s;
        }
        .internal-link:hover {
            color: #26d0ce;
            border-bottom-style: solid;
        }
        .update-time {
            font-style: italic;
            color: #777;
            text-align: right;
            margin-top: 3rem;
            padding-top: 1rem;
            border-top: 1px dashed #ccc;
        }
        aside {
            background: white;
            padding: 2rem;
            border-radius: 15px;
            box-shadow: 0 8px 25px rgba(0, 0, 0, 0.05);
            align-self: start;
            position: sticky;
            top: 150px;
        }
        .sidebar-widget {
            margin-bottom: 2.5rem;
        }
        .sidebar-widget h3 {
            color: #1a2980;
            margin-bottom: 1.2rem;
            padding-bottom: 8px;
            border-bottom: 3px solid #FFD700;
        }
        .rating-form, .comment-form {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }
        .rating-stars {
            display: flex;
            gap: 10px;
            font-size: 1.8rem;
            color: #ddd;
            cursor: pointer;
        }
        .rating-stars .star:hover,
        .rating-stars .star.active {
            color: #FFD700;
        }
        textarea, input[type="text"], input[type="email"] {
            width: 100%;
            padding: 12px;
            border: 1px solid #ccc;
            border-radius: 8px;
            font-family: inherit;
            font-size: 1rem;
        }
        .submit-btn {
            background: linear-gradient(to right, #1a2980, #26d0ce);
            color: white;
            border: none;
            padding: 14px;
            border-radius: 8px;
            font-weight: bold;
            cursor: pointer;
            transition: transform 0.3s;
        }
        .submit-btn:hover {
            transform: translateY(-3px);
        }
        footer {
            background: linear-gradient(to right, #1a2980, #26d0ce);
            color: white;
            padding: 3rem 2rem;
            border-radius: 15px 15px 0 0;
            margin-top: 4rem;
            text-align: center;
        }
        .friend-links {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 2rem;
            margin: 2rem 0;
        }
        friend-link a {
            color: #FFD700;
            text-decoration: none;
            font-weight: 600;
            padding: 0.5rem 1rem;
            border: 2px solid transparent;
            border-radius: 6px;
            transition: all 0.3s;
        }
        friend-link a:hover {
            border-color: #FFD700;
            background-color: rgba(255, 215, 0, 0.1);
        }
        .copyright {
            margin-top: 2rem;
            padding-top: 1.5rem;
            border-top: 1px solid rgba(255, 255, 255, 0.2);
            font-size: 0.9rem;
            opacity: 0.9;
        }
        @media (max-width: 768px) {
            .header-container { flex-direction: column; align-items: flex-start; }
            .main-nav { width: 100%; margin-top: 1rem; }
            .main-nav ul {
                flex-direction: column;
                display: none;
                width: 100%;
            }
            .main-nav ul.active { display: flex; }
            .hamburger { display: block; align-self: flex-end; margin-top: -3rem; }
            article h1 { font-size: 2.2rem; }
            article h2 { font-size: 1.8rem; }
            .content-wrapper { gap: 1.5rem; }
            main, aside { padding: 1.5rem; }
        }