* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: #333;
            background-color: #f8f9fa;
            background-image: linear-gradient(135deg, #f5f7fa 0%, #e4edf5 100%);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .site-header {
            background: linear-gradient(90deg, #1a2980, #26d0ce);
            color: white;
            padding: 1rem 2rem;
            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;
            max-width: 1400px;
            margin: 0 auto;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 900;
            text-transform: uppercase;
            letter-spacing: 2px;
            color: #FFD700;
            text-decoration: none;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
            transition: all 0.3s ease;
        }
        .my-logo:hover {
            color: #ffffff;
            transform: scale(1.05);
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
        }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .main-nav a {
            color: white;
            text-decoration: none;
            font-weight: 600;
            font-size: 1.1rem;
            padding: 0.5rem 1rem;
            border-radius: 4px;
            transition: all 0.3s;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .main-nav a:hover,
        .main-nav a:focus {
            background-color: rgba(255, 255, 255, 0.2);
            transform: translateY(-2px);
        }
        .breadcrumb {
            background-color: #e9ecef;
            padding: 0.8rem 2rem;
            font-size: 0.95rem;
            border-bottom: 1px solid #dee2e6;
        }
        .breadcrumb ul {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            max-width: 1400px;
            margin: 0 auto;
        }
        .breadcrumb li:not(:last-child)::after {
            content: "›";
            margin: 0 0.7rem;
            color: #6c757d;
        }
        .breadcrumb a {
            color: #1a2980;
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .main-wrapper {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
            max-width: 1400px;
            margin: 2rem auto;
            padding: 0 2rem;
        }
        .content-area {
            background: white;
            border-radius: 12px;
            padding: 2.5rem;
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.08);
        }
        .sidebar {
            background: white;
            border-radius: 12px;
            padding: 1.8rem;
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.08);
            align-self: start;
            position: sticky;
            top: 120px;
        }
        h1 {
            font-size: 2.8rem;
            color: #1a2980;
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-bottom: 4px solid #26d0ce;
            padding-bottom: 0.5rem;
        }
        h2 {
            font-size: 2.2rem;
            color: #2d3b8d;
            margin: 2.5rem 0 1.2rem;
            padding-left: 0.8rem;
            border-left: 5px solid #FFD700;
        }
        h3 {
            font-size: 1.7rem;
            color: #3a4a9e;
            margin: 2rem 0 1rem;
        }
        h4 {
            font-size: 1.4rem;
            color: #4a5aaf;
            margin: 1.5rem 0 0.8rem;
        }
        p {
            margin-bottom: 1.5rem;
            font-size: 1.15rem;
            text-align: justify;
            hyphens: auto;
        }
        .lead {
            font-size: 1.4rem;
            color: #444;
            font-weight: 500;
            background: #f0f8ff;
            padding: 1.5rem;
            border-radius: 8px;
            border-left: 5px solid #1a2980;
            margin-bottom: 2.5rem;
        }
        .highlight {
            background-color: #fffacd;
            padding: 0.2rem 0.5rem;
            border-radius: 3px;
            font-weight: 600;
        }
        .emoji {
            font-size: 1.3em;
            margin-right: 0.3rem;
        }
        .article-img {
            width: 100%;
            border-radius: 10px;
            margin: 2rem auto;
            box-shadow: 0 8px 16px rgba(0,0,0,0.1);
            border: 5px solid #e4edf5;
        }
        .caption {
            text-align: center;
            font-style: italic;
            color: #666;
            margin-top: 0.5rem;
            font-size: 0.95rem;
        }
        .feature-box {
            background: linear-gradient(145deg, #f0f7ff, #e1eeff);
            border-radius: 10px;
            padding: 2rem;
            margin: 2.5rem 0;
            border: 1px solid #cce0ff;
        }
        .search-box, .comment-box, .rating-box {
            margin-bottom: 2rem;
        }
        .feature-box h3 {
            color: #1a2980;
            display: flex;
            align-items: center;
            gap: 0.7rem;
            margin-top: 0;
        }
        form {
            display: flex;
            flex-direction: column;
            gap: 1.2rem;
        }
        input, textarea, select {
            padding: 0.9rem;
            border: 1px solid #b8d4ff;
            border-radius: 6px;
            font-family: inherit;
            font-size: 1rem;
            transition: border 0.3s;
        }
        input:focus, textarea:focus, select:focus {
            outline: none;
            border-color: #1a2980;
            box-shadow: 0 0 0 3px rgba(26, 41, 128, 0.1);
        }
        button, .btn {
            background: linear-gradient(90deg, #1a2980, #26d0ce);
            color: white;
            border: none;
            padding: 1rem 1.8rem;
            border-radius: 6px;
            font-weight: 700;
            font-size: 1.1rem;
            cursor: pointer;
            transition: all 0.3s;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.7rem;
        }
        button:hover, .btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 7px 14px rgba(26, 41, 128, 0.25);
        }
        .star-rating {
            display: flex;
            gap: 0.5rem;
            font-size: 2rem;
            color: #FFD700;
            margin: 1rem 0;
        }
        .star-rating label {
            cursor: pointer;
        }
        .star-rating input {
            display: none;
        }
        .internal-links {
            background: #f9f9f9;
            padding: 1.5rem;
            border-radius: 8px;
            margin: 2rem 0;
        }
        .internal-links h4 {
            margin-top: 0;
        }
        .internal-links ul {
            columns: 2;
            list-style: none;
        }
        .internal-links li {
            margin-bottom: 0.8rem;
        }
        .internal-links a {
            color: #1a2980;
            text-decoration: none;
            padding: 0.3rem 0.6rem;
            border-radius: 4px;
            transition: background 0.3s;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
        }
        .internal-links a:hover {
            background: #e6f0ff;
            text-decoration: underline;
        }
        .sidebar h3 {
            font-size: 1.5rem;
            color: #1a2980;
            border-bottom: 2px solid #26d0ce;
            padding-bottom: 0.5rem;
            margin-bottom: 1.5rem;
        }
        .sidebar ul {
            list-style: none;
        }
        .sidebar li {
            margin-bottom: 1rem;
            padding-bottom: 1rem;
            border-bottom: 1px dashed #e0e0e0;
        }
        .sidebar a {
            color: #333;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 0.7rem;
            transition: color 0.3s;
        }
        .sidebar a:hover {
            color: #1a2980;
        }
        .site-footer {
            background: #1a1a1a;
            color: #ccc;
            padding: 3rem 2rem 1.5rem;
            margin-top: 4rem;
        }
        .footer-content {
            max-width: 1400px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 3rem;
        }
        .footer-section h4 {
            color: #FFD700;
            font-size: 1.4rem;
            margin-bottom: 1.5rem;
        }
        .friend-links {
            background: #252525;
            padding: 1.5rem;
            border-radius: 8px;
            margin-top: 1rem;
        }
        .friend-links h5 {
            color: #fff;
            margin-bottom: 1rem;
        }
        .friend-links a {
            color: #26d0ce;
            text-decoration: none;
            margin-right: 1.5rem;
            line-height: 2.2;
        }
        .friend-links a:hover {
            text-decoration: underline;
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            margin-top: 2rem;
            border-top: 1px solid #444;
            color: #888;
            font-size: 0.95rem;
        }
        .update-time {
            background: #2a2a2a;
            color: #FFD700;
            padding: 0.5rem 1rem;
            border-radius: 4px;
            display: inline-block;
            margin-top: 1rem;
            font-weight: bold;
        }
        @media (max-width: 1024px) {
            .main-wrapper {
                grid-template-columns: 1fr;
            }
            .sidebar {
                position: static;
            }
        }
        @media (max-width: 768px) {
            .header-container {
                flex-wrap: wrap;
            }
            .nav-toggle {
                display: block;
                order: 1;
            }
            .main-nav {
                width: 100%;
                order: 3;
                display: none;
                margin-top: 1rem;
            }
            .main-nav.active {
                display: block;
            }
            .main-nav ul {
                flex-direction: column;
                gap: 0.5rem;
            }
            .main-nav a {
                padding: 0.8rem;
                justify-content: center;
            }
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.9rem;
            }
            .main-wrapper, .breadcrumb, .site-header {
                padding-left: 1rem;
                padding-right: 1rem;
            }
            .content-area {
                padding: 1.8rem;
            }
            .internal-links ul {
                columns: 1;
            }
        }
        .fade-in {
            animation: fadeIn 1s ease-in-out;
        }
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        .pulse {
            animation: pulse 2s infinite;
        }
        @keyframes pulse {
            0% { box-shadow: 0 0 0 0 rgba(38, 208, 206, 0.7); }
            70% { box-shadow: 0 0 0 10px rgba(38, 208, 206, 0); }
            100% { box-shadow: 0 0 0 0 rgba(38, 208, 206, 0); }
        }
        .tooltip {
            position: relative;
            border-bottom: 1px dotted #1a2980;
            cursor: help;
        }
        .tooltip-text {
            visibility: hidden;
            width: 250px;
            background-color: #1a2980;
            color: white;
            text-align: center;
            border-radius: 6px;
            padding: 0.8rem;
            position: absolute;
            z-index: 1;
            bottom: 125%;
            left: 50%;
            transform: translateX(-50%);
            opacity: 0;
            transition: opacity 0.3s;
            font-size: 0.9rem;
        }
        .tooltip:hover .tooltip-text {
            visibility: visible;
            opacity: 1;
        }