* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Segoe UI', Roboto, Arial, sans-serif;
            background: #0c0e13;
            color: #e8eef2;
            line-height: 1.7;
            font-size: 16px;
        }
        a {
            color: #f0c94d;
            text-decoration: none;
            transition: color 0.2s;
        }
        a:hover {
            color: #ffd966;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        ul,
        ol {
            padding-left: 1.5rem;
            margin: 0.75rem 0;
        }
        li {
            margin-bottom: 0.4rem;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.25;
            margin: 1.8rem 0 0.8rem 0;
            color: #f5f7fa;
            letter-spacing: 0.01em;
        }
        h1 {
            font-size: 2.4rem;
            border-bottom: 3px solid #f0c94d;
            padding-bottom: 0.6rem;
            margin-top: 0.2rem;
        }
        h2 {
            font-size: 1.8rem;
            border-left: 5px solid #f0c94d;
            padding-left: 0.9rem;
            margin-top: 2.4rem;
        }
        h3 {
            font-size: 1.4rem;
            margin-top: 1.8rem;
            color: #f0c94d;
        }
        h4 {
            font-size: 1.15rem;
            margin-top: 1.2rem;
            color: #cfd9e6;
        }
        p {
            margin: 0.9rem 0;
            font-size: 1rem;
            color: #d5dce6;
        }
        strong {
            color: #ffd966;
            font-weight: 700;
        }
        em {
            color: #b0c4de;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: #151a24;
            border-bottom: 2px solid #2a3340;
            padding: 0.6rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.7);
        }
        .header-inner {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 1.6rem;
            font-weight: 800;
            text-transform: uppercase;
            letter-spacing: 2px;
            color: #f0c94d;
            background: linear-gradient(135deg, #f0c94d, #d4a843);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            padding: 4px 0;
            display: inline-block;
        }
        .my-logo:hover {
            opacity: 0.9;
            text-decoration: none;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: 1px solid #3a4555;
            color: #f0c94d;
            font-size: 1.5rem;
            padding: 6px 14px;
            border-radius: 6px;
            cursor: pointer;
        }
        .nav-menu {
            display: flex;
            gap: 1.2rem;
            align-items: center;
            flex-wrap: wrap;
        }
        .nav-menu a {
            color: #c8d0dc;
            font-weight: 500;
            padding: 6px 0;
            border-bottom: 2px solid transparent;
            transition: 0.2s;
            font-size: 0.95rem;
        }
        .nav-menu a:hover {
            color: #f0c94d;
            border-bottom-color: #f0c94d;
            text-decoration: none;
        }
        .nav-menu a i {
            margin-right: 6px;
        }
        .breadcrumb {
            background: #1a202c;
            padding: 0.7rem 0;
            border-bottom: 1px solid #2a3340;
            font-size: 0.85rem;
        }
        .breadcrumb ol {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .breadcrumb li+li::before {
            content: "›";
            margin: 0 10px;
            color: #6a7a8a;
        }
        .breadcrumb a {
            color: #9aabbb;
        }
        .breadcrumb a:hover {
            color: #f0c94d;
        }
        .breadcrumb .current {
            color: #f0c94d;
        }
        .hero {
            background: linear-gradient(145deg, #0f141e, #1b2533);
            padding: 2.8rem 0 2.2rem;
            border-bottom: 1px solid #2a3340;
            text-align: center;
        }
        .hero h1 {
            font-size: 2.6rem;
            border-bottom: none;
            margin-bottom: 0.5rem;
        }
        .hero .subtitle {
            font-size: 1.2rem;
            color: #b0c4de;
            max-width: 800px;
            margin: 0.5rem auto 1rem;
        }
        .hero .meta-info {
            color: #7a8a9a;
            font-size: 0.9rem;
        }
        .hero .meta-info i {
            margin: 0 4px;
        }
        .toc {
            background: #1a202c;
            border: 1px solid #2a3340;
            border-radius: 12px;
            padding: 1.5rem 2rem;
            margin: 2rem 0 2.5rem;
        }
        .toc summary {
            font-size: 1.3rem;
            font-weight: 700;
            color: #f0c94d;
            cursor: pointer;
            padding: 0.2rem 0;
        }
        .toc ol {
            margin-top: 0.8rem;
            columns: 2;
            column-gap: 2rem;
            list-style: decimal;
            padding-left: 1.5rem;
        }
        .toc li {
            margin-bottom: 0.3rem;
            break-inside: avoid;
        }
        .toc a {
            color: #b0c4de;
        }
        .toc a:hover {
            color: #f0c94d;
        }
        @media (max-width: 700px) {
            .toc ol {
                columns: 1;
            }
        }
        .content-area {
            padding: 2rem 0 3rem;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2.5rem;
        }
        .article-body {
            min-width: 0;
        }
        .article-body p,
        .article-body li {
            font-size: 1.05rem;
        }
        .article-body .feature-img {
            border-radius: 14px;
            margin: 1.5rem 0;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.8);
            border: 1px solid #2a3340;
        }
        .article-body .img-caption {
            font-size: 0.85rem;
            color: #7a8a9a;
            text-align: center;
            margin-top: -0.8rem;
            margin-bottom: 1.5rem;
        }
        .highlight-box {
            background: #1a202c;
            border-left: 6px solid #f0c94d;
            padding: 1.2rem 1.8rem;
            border-radius: 0 12px 12px 0;
            margin: 1.8rem 0;
        }
        .highlight-box p {
            margin: 0.3rem 0;
        }
        .info-table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.5rem 0;
            font-size: 0.95rem;
        }
        .info-table th,
        .info-table td {
            border: 1px solid #2a3340;
            padding: 0.7rem 1rem;
            text-align: left;
        }
        .info-table th {
            background: #1f2735;
            color: #f0c94d;
            font-weight: 600;
        }
        .info-table td {
            background: #131a24;
        }
        .info-table tr:hover td {
            background: #1a2230;
        }
        .sidebar {
            position: sticky;
            top: 100px;
            align-self: start;
        }
        .sidebar-card {
            background: #151a24;
            border: 1px solid #2a3340;
            border-radius: 12px;
            padding: 1.2rem 1.4rem;
            margin-bottom: 1.5rem;
        }
        .sidebar-card h4 {
            font-size: 1.1rem;
            color: #f0c94d;
            border-bottom: 1px solid #2a3340;
            padding-bottom: 0.5rem;
            margin-top: 0;
            margin-bottom: 0.8rem;
        }
        .sidebar-card ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .sidebar-card li {
            margin-bottom: 0.5rem;
            border-bottom: 1px solid #1f2735;
            padding-bottom: 0.5rem;
        }
        .sidebar-card li:last-child {
            border-bottom: none;
        }
        .sidebar-card a {
            color: #b0c4de;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sidebar-card a:hover {
            color: #f0c94d;
        }
        .sidebar-card a i {
            width: 20px;
            color: #f0c94d;
        }
        .search-form {
            display: flex;
            gap: 8px;
            margin: 1rem 0;
        }
        .search-form input[type="text"] {
            flex: 1;
            padding: 10px 16px;
            border: 1px solid #2a3340;
            border-radius: 8px;
            background: #0c0e13;
            color: #e8eef2;
            font-size: 0.95rem;
            outline: none;
            transition: 0.2s;
        }
        .search-form input[type="text"]:focus {
            border-color: #f0c94d;
            box-shadow: 0 0 0 2px rgba(240, 201, 77, 0.2);
        }
        .search-form button {
            padding: 10px 18px;
            background: #f0c94d;
            color: #0c0e13;
            border: none;
            border-radius: 8px;
            font-weight: 700;
            cursor: pointer;
            transition: 0.2s;
        }
        .search-form button:hover {
            background: #ffd966;
            transform: scale(1.02);
        }
        .interaction-area {
            margin-top: 3rem;
            padding-top: 2rem;
            border-top: 2px solid #2a3340;
        }
        .comment-form,
        .rating-form {
            background: #151a24;
            border: 1px solid #2a3340;
            border-radius: 12px;
            padding: 1.5rem 2rem;
            margin-bottom: 2rem;
        }
        .comment-form h3,
        .rating-form h3 {
            margin-top: 0;
            margin-bottom: 0.8rem;
        }
        .comment-form textarea,
        .comment-form input[type="text"],
        .comment-form input[type="email"] {
            width: 100%;
            padding: 10px 14px;
            border: 1px solid #2a3340;
            border-radius: 8px;
            background: #0c0e13;
            color: #e8eef2;
            font-size: 0.95rem;
            outline: none;
            margin-bottom: 0.8rem;
            font-family: inherit;
            transition: 0.2s;
        }
        .comment-form textarea:focus,
        .comment-form input:focus {
            border-color: #f0c94d;
        }
        .comment-form textarea {
            min-height: 100px;
            resize: vertical;
        }
        .comment-form .btn,
        .rating-form .btn {
            padding: 10px 28px;
            background: #f0c94d;
            color: #0c0e13;
            border: none;
            border-radius: 8px;
            font-weight: 700;
            font-size: 1rem;
            cursor: pointer;
            transition: 0.2s;
        }
        .comment-form .btn:hover,
        .rating-form .btn:hover {
            background: #ffd966;
            transform: translateY(-1px);
        }
        .star-rating {
            display: flex;
            flex-direction: row-reverse;
            justify-content: flex-end;
            gap: 6px;
            margin: 0.8rem 0;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            font-size: 2rem;
            color: #3a4555;
            cursor: pointer;
            transition: 0.2s;
        }
        .star-rating label:hover,
        .star-rating label:hover~label,
        .star-rating input:checked~label {
            color: #f0c94d;
            transform: scale(1.1);
        }
        friend-link {
            display: block;
            padding: 1.2rem 0;
            border-top: 1px solid #2a3340;
            margin-top: 0.5rem;
        }
        friend-link ul {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem 2rem;
            list-style: none;
            padding: 0;
            margin: 0.5rem 0 0;
        }
        friend-link li a {
            color: #9aabbb;
            font-size: 0.9rem;
        }
        friend-link li a:hover {
            color: #f0c94d;
        }
        .site-footer {
            background: #0a0e14;
            border-top: 2px solid #1f2735;
            padding: 2rem 0 1.5rem;
            margin-top: 2rem;
        }
        .site-footer .copyright {
            color: #5a6a7a;
            font-size: 0.85rem;
            text-align: center;
            margin-top: 1rem;
        }
        .site-footer .copyright i {
            margin: 0 4px;
        }
        @media (max-width: 900px) {
            .content-grid {
                grid-template-columns: 1fr;
            }
            .sidebar {
                position: static;
                display: grid;
                grid-template-columns: 1fr 1fr;
                gap: 1rem;
            }
            .sidebar .sidebar-card {
                margin-bottom: 0;
            }
        }
        @media (max-width: 700px) {
            .nav-toggle {
                display: block;
            }
            .nav-menu {
                display: none;
                flex-direction: column;
                width: 100%;
                background: #151a24;
                padding: 1rem 0;
                border-top: 1px solid #2a3340;
                margin-top: 0.6rem;
                gap: 0.2rem;
            }
            .nav-menu.open {
                display: flex;
            }
            .nav-menu a {
                padding: 10px 16px;
                border-bottom: 1px solid #1f2735;
                width: 100%;
            }
            .hero h1 {
                font-size: 1.8rem;
            }
            h1 {
                font-size: 1.8rem;
            }
            h2 {
                font-size: 1.4rem;
            }
            h3 {
                font-size: 1.2rem;
            }
            .sidebar {
                grid-template-columns: 1fr;
            }
            .toc ol {
                columns: 1;
            }
            .info-table {
                font-size: 0.85rem;
            }
            .info-table th,
            .info-table td {
                padding: 0.5rem 0.6rem;
            }
        }
        @media (max-width: 480px) {
            .container {
                padding: 0 12px;
            }
            .hero h1 {
                font-size: 1.5rem;
            }
            .my-logo {
                font-size: 1.2rem;
            }
            .search-form {
                flex-direction: column;
            }
            .search-form button {
                width: 100%;
            }
            .comment-form,
            .rating-form {
                padding: 1rem;
            }
            .star-rating label {
                font-size: 1.6rem;
            }
        }
        .fade-up {
            opacity: 0;
            transform: translateY(20px);
            animation: fadeUp 0.6s ease forwards;
        }
        @keyframes fadeUp {
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .schema-hidden {
            display: none;
        }