* { 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: #f8f9fa;
            max-width: 100vw;
            overflow-x: hidden;
        }
        a { color: #1a73e8; text-decoration: none; transition: color 0.3s ease; }
        a:hover { color: #0d47a1; text-decoration: underline; }
        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; }
        .mb-1 { margin-bottom: 0.5rem; }
        .mb-2 { margin-bottom: 1rem; }
        .mb-3 { margin-bottom: 2rem; }
        .mb-4 { margin-bottom: 3rem; }
        .py-2 { padding-top: 1rem; padding-bottom: 1rem; }
        .py-3 { padding-top: 2rem; padding-bottom: 2rem; }
        .highlight { background-color: #fffacd; padding: 0.2em 0.4em; border-radius: 3px; }
        .site-header {
            background: linear-gradient(135deg, #1a237e 0%, #283593 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-family: 'Trebuchet MS', sans-serif;
            font-size: 2.2rem;
            font-weight: 900;
            color: #fff;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
            letter-spacing: -1px;
        }
        .my-logo a { color: inherit; text-decoration: none; }
        .my-logo span:first-child { color: #4fc3f7; }
        .my-logo span:last-child { color: #ffb74d; }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 0.5rem;
        }
        .nav-menu {
            display: flex;
            list-style: none;
            gap: 1.8rem;
        }
        .nav-menu a {
            color: #e3f2fd;
            font-weight: 600;
            padding: 0.5rem 0.3rem;
            border-bottom: 2px solid transparent;
        }
        .nav-menu a:hover, .nav-menu a.active {
            color: #ffb74d;
            border-bottom-color: #ffb74d;
            text-decoration: none;
        }
        .breadcrumb {
            background: #e8eaf6;
            padding: 0.8rem 0;
            font-size: 0.9rem;
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
            gap: 0.5rem;
        }
        .breadcrumb li:not(:last-child)::after {
            content: '›';
            margin-left: 0.5rem;
            color: #5c6bc0;
        }
        .breadcrumb a { color: #3949ab; }
        .main-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
            margin-top: 2rem;
        }
        .article-content {
            background: white;
            padding: 2.5rem;
            border-radius: 12px;
            box-shadow: 0 6px 20px rgba(0,0,0,0.07);
        }
        .article-meta {
            color: #666;
            font-size: 0.9rem;
            border-bottom: 1px dashed #ddd;
            padding-bottom: 1rem;
            margin-bottom: 2rem;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
        }
        .update-time { color: #d32f2f; font-weight: bold; }
        h1 {
            font-size: 2.8rem;
            color: #1a237e;
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-left: 6px solid #ffb74d;
            padding-left: 1rem;
        }
        h2 {
            font-size: 2rem;
            color: #283593;
            margin: 2.5rem 0 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #e8eaf6;
        }
        h3 {
            font-size: 1.6rem;
            color: #3949ab;
            margin: 2rem 0 1rem;
        }
        h4 {
            font-size: 1.3rem;
            color: #5c6bc0;
            margin: 1.5rem 0 0.8rem;
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
            hyphens: auto;
        }
        .lead {
            font-size: 1.2rem;
            color: #555;
            font-weight: 500;
            background: #f3f5ff;
            padding: 1.5rem;
            border-radius: 8px;
            margin-bottom: 2.5rem;
        }
        .feature-img {
            width: 100%;
            border-radius: 10px;
            overflow: hidden;
            margin: 2rem 0;
            box-shadow: 0 8px 25px rgba(0,0,0,0.1);
            border: 1px solid #eee;
        }
        .img-caption {
            text-align: center;
            font-style: italic;
            color: #666;
            margin-top: 0.5rem;
            font-size: 0.95rem;
        }
        blockquote {
            border-left: 5px solid #4fc3f7;
            background: #f1f8ff;
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 8px 8px 0;
            font-style: italic;
        }
        blockquote p:last-child { margin-bottom: 0; }
        ul, ol { margin-left: 1.5rem; margin-bottom: 1.5rem; }
        li { margin-bottom: 0.5rem; }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 2rem;
        }
        .sidebar-widget {
            background: white;
            padding: 1.5rem;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        .sidebar-title {
            font-size: 1.3rem;
            color: #1a237e;
            margin-bottom: 1.2rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #ffb74d;
            display: flex;
            align-items: center;
            gap: 0.7rem;
        }
        .sidebar-title i { color: #ffb74d; }
        .search-form {
            display: flex;
        }
        .search-input {
            flex: 1;
            padding: 0.9rem 1rem;
            border: 2px solid #c5cae9;
            border-radius: 6px 0 0 6px;
            font-size: 1rem;
            outline: none;
            transition: border-color 0.3s;
        }
        .search-input:focus { border-color: #3949ab; }
        .search-btn {
            background: #3949ab;
            color: white;
            border: none;
            padding: 0 1.5rem;
            border-radius: 0 6px 6px 0;
            cursor: pointer;
            transition: background 0.3s;
        }
        .search-btn:hover { background: #283593; }
        .rating-form, .comment-form {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }
        .stars {
            display: flex;
            gap: 0.5rem;
            font-size: 1.8rem;
            color: #ddd;
            cursor: pointer;
            margin-bottom: 0.5rem;
        }
        .stars .active { color: #ffb74d; }
        .form-group { display: flex; flex-direction: column; }
        label { font-weight: 600; margin-bottom: 0.3rem; color: #555; }
        input, textarea, select {
            padding: 0.8rem;
            border: 1px solid #c5cae9;
            border-radius: 6px;
            font-family: inherit;
            font-size: 1rem;
            transition: border 0.3s;
        }
        input:focus, textarea:focus, select:focus {
            outline: none;
            border-color: #3949ab;
            box-shadow: 0 0 0 3px rgba(57, 73, 171, 0.1);
        }
        .submit-btn {
            background: linear-gradient(to right, #1a73e8, #0d47a1);
            color: white;
            border: none;
            padding: 1rem 1.5rem;
            border-radius: 6px;
            font-weight: bold;
            cursor: pointer;
            transition: transform 0.2s, box-shadow 0.2s;
            margin-top: 0.5rem;
        }
        .submit-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(13, 71, 161, 0.3);
        }
        .site-footer {
            background: #1a237e;
            color: #e3f2fd;
            margin-top: 4rem;
            padding: 3rem 0 1.5rem;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2.5rem;
            margin-bottom: 2.5rem;
        }
        .footer-section h3 {
            color: #ffb74d;
            font-size: 1.4rem;
            margin-bottom: 1.5rem;
            padding-bottom: 0.5rem;
            border-bottom: 1px solid #3949ab;
        }
        .footer-links { list-style: none; }
        .footer-links li { margin-bottom: 0.8rem; }
        .footer-links a { color: #bbdefb; }
        .footer-links a:hover { color: #ffb74d; }
        friend-link {
            display: block;
            background: #283593;
            padding: 1.5rem;
            border-radius: 8px;
            margin-top: 1rem;
        }
        friend-link h4 { color: #ffb74d; margin-top: 0; }
        friend-link ul { list-style: none; margin-left: 0; display: flex; flex-wrap: wrap; gap: 1.5rem; }
        friend-link a { color: #c5cae9; }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #3949ab;
            font-size: 0.9rem;
            color: #9fa8da;
        }
        @media (max-width: 992px) {
            .main-grid { grid-template-columns: 1fr; }
            h1 { font-size: 2.3rem; }
            h2 { font-size: 1.8rem; }
        }
        @media (max-width: 768px) {
            .hamburger { display: block; }
            .nav-menu {
                position: fixed;
                top: 70px;
                right: -100%;
                flex-direction: column;
                background: #1a237e;
                width: 280px;
                height: calc(100vh - 70px);
                padding: 2rem;
                transition: right 0.4s ease;
                box-shadow: -5px 0 15px rgba(0,0,0,0.2);
                z-index: 999;
            }
            .nav-menu.active { right: 0; }
            .header-content { position: relative; }
            .article-content { padding: 1.5rem; }
            .footer-content { grid-template-columns: 1fr; text-align: center; }
            friend-link ul { justify-content: center; }
        }