*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: 'Segoe UI', Roboto, -apple-system, BlinkMacSystemFont, sans-serif;
            background: #0b0e14;
            color: #e8edf3;
            line-height: 1.75;
            padding: 0 1rem;
            max-width: 1280px;
            margin: 0 auto;
        }
        a {
            color: #f5a623;
            text-decoration: none;
            transition: color 0.2s;
        }
        a:hover,
        a:focus {
            color: #ffc857;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 8px;
        }
        ul,
        ol {
            padding-left: 1.5rem;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 600;
            line-height: 1.25;
            margin-top: 1.8rem;
            margin-bottom: 0.6rem;
            color: #f0f4fa;
        }
        h1 {
            font-size: 2.4rem;
            border-left: 6px solid #f5a623;
            padding-left: 1rem;
        }
        h2 {
            font-size: 1.8rem;
            border-bottom: 2px solid #2a323e;
            padding-bottom: 0.3rem;
        }
        h3 {
            font-size: 1.35rem;
            color: #f5c542;
        }
        h4 {
            font-size: 1.1rem;
            color: #bcc9db;
        }
        p {
            margin-bottom: 1.2rem;
        }
        blockquote {
            border-left: 4px solid #f5a623;
            background: #1a212b;
            padding: 1rem 1.5rem;
            margin: 1.5rem 0;
            border-radius: 0 8px 8px 0;
            font-style: italic;
        }
        code {
            background: #1f2937;
            padding: 0.2rem 0.5rem;
            border-radius: 4px;
            font-size: 0.9rem;
        }
        hr {
            border: none;
            border-top: 1px solid #2a323e;
            margin: 2rem 0;
        }
        header {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            padding: 1.2rem 0;
            border-bottom: 1px solid #2a323e;
            position: relative;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 700;
            background: linear-gradient(135deg, #f5a623, #f7c948);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: 0.5px;
        }
        .my-logo i {
            -webkit-text-fill-color: #f5a623;
            margin-right: 0.3rem;
        }
        .my-logo:hover {
            opacity: 0.85;
            text-decoration: none;
        }
        nav {
            display: flex;
            align-items: center;
            gap: 1.2rem;
        }
        nav a {
            color: #c8d2e0;
            font-weight: 500;
            font-size: 0.95rem;
            padding: 0.3rem 0.6rem;
            border-radius: 4px;
            transition: background 0.2s;
        }
        nav a:hover {
            background: #1f2937;
            color: #f5a623;
            text-decoration: none;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: #f0f4fa;
            font-size: 1.6rem;
            cursor: pointer;
            padding: 0.2rem 0.6rem;
        }
        #nav-toggle {
            display: none;
        }
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            padding: 0.8rem 0;
            font-size: 0.85rem;
            color: #8899aa;
        }
        .breadcrumb li+li::before {
            content: "›";
            padding: 0 0.6rem;
            color: #556677;
        }
        .breadcrumb a {
            color: #8899aa;
        }
        .breadcrumb a:hover {
            color: #f5a623;
        }
        .breadcrumb .active {
            color: #f5a623;
        }
        .search-form {
            display: flex;
            gap: 0.5rem;
            margin: 1.2rem 0;
            max-width: 500px;
        }
        .search-form input {
            flex: 1;
            padding: 0.65rem 1rem;
            border: 1px solid #2a323e;
            border-radius: 6px;
            background: #151d26;
            color: #e8edf3;
            font-size: 1rem;
            transition: border 0.2s;
        }
        .search-form input:focus {
            border-color: #f5a623;
            outline: none;
        }
        .search-form button {
            background: #f5a623;
            border: none;
            border-radius: 6px;
            padding: 0.65rem 1.2rem;
            color: #0b0e14;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.2s;
        }
        .search-form button:hover {
            background: #ffc857;
        }
        .main-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2rem;
            margin: 2rem 0;
        }
        .article-content {
            min-width: 0;
        }
        .sidebar {
            background: #111922;
            border-radius: 12px;
            padding: 1.5rem 1.2rem;
            border: 1px solid #1f2937;
            height: fit-content;
            position: sticky;
            top: 1rem;
        }
        .sidebar h3 {
            font-size: 1.1rem;
            margin-top: 0;
            border-bottom: 1px solid #2a323e;
            padding-bottom: 0.5rem;
        }
        .sidebar ul {
            list-style: none;
            padding-left: 0;
        }
        .sidebar li {
            padding: 0.3rem 0;
        }
        .sidebar li a {
            font-size: 0.9rem;
        }
        .info-card {
            background: #151d26;
            border: 1px solid #1f2937;
            border-radius: 10px;
            padding: 1.2rem 1.5rem;
            margin: 1.5rem 0;
        }
        .info-card h4 {
            margin-top: 0;
        }
        .stat-row {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            justify-content: space-between;
        }
        .stat-item {
            background: #0d131c;
            padding: 0.8rem 1.2rem;
            border-radius: 8px;
            flex: 1 1 120px;
            text-align: center;
        }
        .stat-item .num {
            font-size: 1.8rem;
            font-weight: 700;
            color: #f5a623;
        }
        .stat-item .label {
            font-size: 0.8rem;
            color: #8899aa;
            text-transform: uppercase;
        }
        .user-feedback {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1.5rem;
            margin: 2.5rem 0;
            padding: 1.5rem;
            background: #111922;
            border-radius: 12px;
            border: 1px solid #1f2937;
        }
        .feedback-form label {
            display: block;
            font-weight: 500;
            margin-top: 0.8rem;
            margin-bottom: 0.2rem;
            font-size: 0.9rem;
            color: #bcc9db;
        }
        .feedback-form input,
        .feedback-form textarea,
        .feedback-form select {
            width: 100%;
            padding: 0.6rem 0.9rem;
            border: 1px solid #2a323e;
            border-radius: 6px;
            background: #151d26;
            color: #e8edf3;
            font-size: 0.95rem;
            font-family: inherit;
        }
        .feedback-form textarea {
            resize: vertical;
            min-height: 70px;
        }
        .feedback-form input:focus,
        .feedback-form textarea:focus,
        .feedback-form select:focus {
            border-color: #f5a623;
            outline: none;
        }
        .feedback-form button {
            margin-top: 1rem;
            background: #f5a623;
            border: none;
            border-radius: 6px;
            padding: 0.6rem 1.4rem;
            font-weight: 600;
            color: #0b0e14;
            cursor: pointer;
            transition: background 0.2s;
        }
        .feedback-form button:hover {
            background: #ffc857;
        }
        .star-rating {
            display: flex;
            flex-direction: row-reverse;
            justify-content: flex-end;
            gap: 0.2rem;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            font-size: 1.6rem;
            color: #3a4555;
            cursor: pointer;
            transition: color 0.15s;
        }
        .star-rating input:checked~label,
        .star-rating label:hover,
        .star-rating label:hover~label {
            color: #f5a623;
        }
        .featured-img {
            margin: 1.8rem 0;
            border-radius: 10px;
            overflow: hidden;
            background: #151d26;
            padding: 0.5rem;
        }
        .featured-img img {
            width: 100%;
            border-radius: 8px;
        }
        .featured-img figcaption {
            text-align: center;
            font-size: 0.85rem;
            color: #8899aa;
            padding: 0.5rem 0 0.2rem;
        }
        footer {
            border-top: 1px solid #2a323e;
            padding: 2rem 0 1.5rem;
            margin-top: 3rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 2rem;
        }
        footer a {
            color: #8899aa;
        }
        footer a:hover {
            color: #f5a623;
        }
        footer .copyright {
            text-align: center;
            padding-top: 1.5rem;
            font-size: 0.85rem;
            color: #556677;
            border-top: 1px solid #1f2937;
            margin-top: 1.5rem;
        }
        friend-link {
            display: block;
            margin: 1rem 0;
        }
        friend-link a {
            display: inline-block;
            margin: 0.2rem 0.8rem 0.2rem 0;
            padding: 0.2rem 0.6rem;
            background: #151d26;
            border-radius: 4px;
            font-size: 0.85rem;
        }
        friend-link a:hover {
            background: #1f2937;
        }
        @media (max-width: 900px) {
            .main-grid {
                grid-template-columns: 1fr;
            }
            .sidebar {
                position: static;
                order: 2;
            }
            .user-feedback {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 700px) {
            body {
                padding: 0 0.6rem;
            }
            h1 {
                font-size: 1.7rem;
            }
            h2 {
                font-size: 1.35rem;
            }
            h3 {
                font-size: 1.15rem;
            }
            header {
                flex-wrap: nowrap;
            }
            .hamburger {
                display: block;
            }
            nav {
                display: none;
                flex-direction: column;
                background: #0b0e14;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                padding: 1rem;
                border-bottom: 1px solid #2a323e;
                z-index: 100;
                gap: 0.6rem;
            }
            #nav-toggle:checked~nav {
                display: flex;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .stat-row {
                flex-direction: column;
            }
            .search-form {
                max-width: 100%;
            }
        }
        @media (min-width: 701px) {
            #nav-toggle {
                display: none;
            }
            nav {
                display: flex !important;
            }
            .hamburger {
                display: none !important;
            }
        }
        ::-webkit-scrollbar {
            width: 8px;
        }
        ::-webkit-scrollbar-track {
            background: #0b0e14;
        }
        ::-webkit-scrollbar-thumb {
            background: #2a323e;
            border-radius: 4px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: #3a4a5a;
        }
        @media print {
            body {
                background: #fff;
                color: #111;
            }
            a {
                color: #0055aa;
            }
            .sidebar,
            .search-form,
            .user-feedback,
            .hamburger {
                display: none !important;
            }
            nav {
                display: flex !important;
            }
        }