*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; font-size: 16px; }
        body {
            font-family: 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            line-height: 1.7;
            color: #2c2c2c;
            background: #f8f9fa;
        }
        img { max-width: 100%; height: auto; display: block; }
        a { color: #1a73e8; text-decoration: none; transition: color .2s ease; }
        a:hover { color: #c5221f; text-decoration: underline; }
        ul, ol { padding-left: 1.5rem; margin-bottom: 1rem; }
        p { margin-bottom: 1.2rem; }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
        .site-header {
            background: linear-gradient(135deg, #0f2027, #203a43, #2c5364);
            color: #fff;
            padding: 18px 0;
            box-shadow: 0 4px 15px rgba(0,0,0,.2);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-wrap {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: 1px;
            text-transform: uppercase;
            background: rgba(255,255,255,.1);
            padding: 6px 16px;
            border-radius: 30px;
            border: 2px solid #ffd700;
            transition: all .3s ease;
        }
        .my-logo:hover {
            background: rgba(255,215,0,.2);
            color: #ffd700;
            text-decoration: none;
            transform: scale(1.02);
        }
        .my-logo small {
            font-size: .9rem;
            font-weight: normal;
            color: #aab;
            display: block;
            line-height: 1.2;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .nav-links {
            display: flex;
            list-style: none;
            gap: 6px;
            flex-wrap: wrap;
        }
        .nav-links a {
            color: #e0e0e0;
            padding: 8px 14px;
            border-radius: 20px;
            font-size: .9rem;
            font-weight: 500;
            transition: all .3s;
        }
        .nav-links a:hover {
            background: #ffd700;
            color: #0f2027;
            text-decoration: none;
        }
        .hamburger {
            display: none;
            background: none;
            border: 2px solid #ffd700;
            color: #ffd700;
            font-size: 1.4rem;
            padding: 6px 12px;
            border-radius: 8px;
            cursor: pointer;
        }
        .breadcrumb-wrap {
            background: #fff;
            border-bottom: 1px solid #e9ecef;
            padding: 10px 0;
        }
        .breadcrumb {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            font-size: .85rem;
            gap: 5px;
        }
        .breadcrumb li + li::before {
            content: "›";
            margin: 0 6px;
            color: #999;
        }
        .breadcrumb a { color: #5f6368; }
        .breadcrumb a:hover { color: #1a73e8; }
        .breadcrumb .active { color: #999; }
        .content-wrapper {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 30px;
            padding: 30px 0;
        }
        .article-body {
            background: #fff;
            border-radius: 12px;
            padding: 35px;
            box-shadow: 0 2px 10px rgba(0,0,0,.06);
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 25px;
        }
        .widget {
            background: #fff;
            border-radius: 12px;
            padding: 24px;
            box-shadow: 0 2px 10px rgba(0,0,0,.06);
        }
        .widget h3 {
            font-size: 1.1rem;
            border-bottom: 3px solid #ffd700;
            padding-bottom: 10px;
            margin-bottom: 16px;
            color: #0f2027;
        }
        .widget ul {
            list-style: none;
            padding: 0;
        }
        .widget ul li {
            margin-bottom: 10px;
            padding-left: 20px;
            position: relative;
        }
        .widget ul li::before {
            content: "▸";
            position: absolute;
            left: 0;
            color: #ffd700;
            font-size: 1.1rem;
        }
        .widget ul li a {
            font-size: .9rem;
            line-height: 1.4;
        }
        h1 {
            font-size: 2.4rem;
            color: #0f2027;
            margin: 0 0 12px;
            line-height: 1.3;
            font-weight: 800;
        }
        h2 {
            font-size: 1.8rem;
            color: #203a43;
            margin: 2rem 0 1rem;
            padding-bottom: 8px;
            border-bottom: 3px solid #ffd700;
            font-weight: 700;
        }
        h3 {
            font-size: 1.3rem;
            color: #2c5364;
            margin: 1.5rem 0 .8rem;
            font-weight: 600;
        }
        h4 {
            font-size: 1.1rem;
            color: #444;
            margin: 1rem 0 .5rem;
            font-weight: 600;
        }
        .article-meta {
            display: flex;
            gap: 15px;
            flex-wrap: wrap;
            color: #777;
            font-size: .85rem;
            margin-bottom: 22px;
            padding-bottom: 15px;
            border-bottom: 1px solid #eee;
        }
        .article-meta i {
            margin-right: 4px;
        }
        .highlight-box {
            background: #f0f7ff;
            border-left: 5px solid #1a73e8;
            padding: 16px 20px;
            border-radius: 6px;
            margin: 20px 0;
        }
        .warning-box {
            background: #fff8e6;
            border-left: 5px solid #ffd700;
            padding: 16px 20px;
            border-radius: 6px;
            margin: 20px 0;
        }
        .img-caption {
            font-size: .85rem;
            color: #888;
            text-align: center;
            margin-top: 8px;
            font-style: italic;
        }
        .feature-img {
            border-radius: 10px;
            margin: 20px 0;
            box-shadow: 0 4px 12px rgba(0,0,0,.1);
        }
        .related-links {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 10px;
            margin: 20px 0;
            padding: 0;
        }
        .related-links a {
            background: #f4f6f8;
            padding: 12px 16px;
            border-radius: 8px;
            font-size: .9rem;
            border-left: 4px solid #ffd700;
            transition: all .3s;
            display: block;
        }
        .related-links a:hover {
            background: #e8f0fe;
            transform: translateX(4px);
            text-decoration: none;
        }
        .feedback-section {
            margin-top: 40px;
            border-top: 2px solid #e9ecef;
            padding-top: 30px;
        }
        .feedback-section h2 {
            border-bottom: none;
            margin-top: 0;
        }
        .form-group {
            margin-bottom: 18px;
        }
        .form-group label {
            display: block;
            font-weight: 600;
            margin-bottom: 6px;
            color: #333;
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 12px 14px;
            border: 2px solid #e1e5ea;
            border-radius: 8px;
            font-size: .95rem;
            font-family: inherit;
            transition: border-color .3s;
        }
        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            outline: none;
            border-color: #1a73e8;
        }
        .btn {
            background: linear-gradient(135deg, #1a73e8, #0d5bbd);
            color: #fff;
            border: none;
            padding: 12px 28px;
            border-radius: 30px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: all .3s ease;
            box-shadow: 0 4px 10px rgba(26,115,232,.3);
        }
        .btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 16px rgba(26,115,232,.4);
        }
        .rating-stars {
            font-size: 1.6rem;
            color: #ddd;
            cursor: pointer;
            display: flex;
            gap: 4px;
        }
        .rating-stars .fa-solid {
            color: #ffd700;
        }
        .rating-stars i {
            transition: transform .2s;
        }
        .rating-stars i:hover {
            transform: scale(1.2);
        }
        .search-box {
            position: relative;
        }
        .search-box input {
            width: 100%;
            padding: 12px 45px 12px 16px;
            border: 2px solid #e1e5ea;
            border-radius: 30px;
            font-size: .9rem;
        }
        .search-box button {
            position: absolute;
            right: 4px;
            top: 50%;
            transform: translateY(-50%);
            background: #ffd700;
            border: none;
            border-radius: 50%;
            width: 36px;
            height: 36px;
            cursor: pointer;
            color: #0f2027;
            font-size: .9rem;
        }
        .site-footer {
            background: #0f2027;
            color: #adb5bd;
            padding: 40px 0 20px;
            margin-top: 40px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 30px;
            margin-bottom: 25px;
        }
        .site-footer h4 {
            color: #ffd700;
            margin-bottom: 14px;
            font-size: 1rem;
        }
        .site-footer ul {
            list-style: none;
            padding: 0;
        }
        .site-footer ul li {
            margin-bottom: 8px;
        }
        .site-footer a {
            color: #adb5bd;
            font-size: .9rem;
        }
        .site-footer a:hover {
            color: #ffd700;
        }
        .copyright {
            border-top: 1px solid #2c3e50;
            padding-top: 20px;
            font-size: .8rem;
            text-align: center;
        }
        friend-link {
            display: block;
            margin-top: 20px;
            font-size: .9rem;
        }
        friend-link a {
            margin: 0 5px;
        }
        @media (max-width: 992px) {
            .content-wrapper {
                grid-template-columns: 1fr;
            }
            .sidebar {
                order: 2;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 768px) {
            .header-wrap {
                padding: 0 10px;
            }
            .my-logo { font-size: 1.4rem; }
            .nav-links {
                display: none;
                flex-direction: column;
                width: 100%;
                background: #1a2a35;
                border-radius: 10px;
                padding: 15px;
                position: absolute;
                top: 70px;
                left: 0;
                right: 0;
                box-shadow: 0 6px 20px rgba(0,0,0,.3);
            }
            .nav-links.show {
                display: flex;
            }
            .nav-links li {
                margin-bottom: 8px;
            }
            .nav-links a {
                display: block;
                padding: 10px 20px;
                background: rgba(255,255,255,.05);
            }
            .hamburger {
                display: block;
            }
            .article-body {
                padding: 20px;
            }
            h1 { font-size: 1.8rem; }
            h2 { font-size: 1.4rem; }
            .related-links {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 480px) {
            .container { padding: 0 12px; }
            .article-body { padding: 16px; }
            .form-group input, .form-group textarea { font-size: .85rem; }
            .btn { width: 100%; }
        }
        @media print {
            .site-header, .sidebar, .site-footer, .breadcrumb-wrap { display: none; }
            .content-wrapper { display: block; }
            .article-body { box-shadow: none; padding: 0; }
        }