* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, Roboto, 'Helvetica Neue', sans-serif;
            background: #f8fafc;
            color: #1e293b;
            line-height: 1.7;
            font-size: 16px;
            scroll-behavior: smooth;
        }
        a {
            color: #2563eb;
            text-decoration: none;
            transition: color 0.2s;
        }
        a:hover {
            color: #1d4ed8;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 12px;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: linear-gradient(135deg, #0f172a, #1e293b);
            padding: 16px 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            color: #fbbf24;
            letter-spacing: -0.5px;
            text-shadow: 0 2px 8px rgba(251, 191, 36, 0.2);
            transition: transform 0.2s;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .my-logo:hover {
            transform: scale(1.02);
            text-decoration: none;
            color: #fcd34d;
        }
        .my-logo i {
            color: #60a5fa;
            font-size: 1.6rem;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            color: #fff;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 4px 8px;
            border-radius: 8px;
            transition: background 0.2s;
        }
        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.1);
        }
        .nav-menu {
            display: flex;
            align-items: center;
            gap: 24px;
            flex-wrap: wrap;
        }
        .nav-menu a {
            color: #e2e8f0;
            font-weight: 500;
            font-size: 0.95rem;
            padding: 6px 0;
            border-bottom: 2px solid transparent;
            transition: border-color 0.2s, color 0.2s;
        }
        .nav-menu a:hover {
            color: #fbbf24;
            border-bottom-color: #fbbf24;
            text-decoration: none;
        }
        .nav-menu a i {
            margin-right: 6px;
            font-size: 0.85rem;
        }
        .breadcrumb {
            background: #f1f5f9;
            padding: 10px 0;
            font-size: 0.85rem;
            border-bottom: 1px solid #e2e8f0;
        }
        .breadcrumb ol {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
        }
        .breadcrumb li+li::before {
            content: "›";
            padding: 0 8px;
            color: #94a3b8;
        }
        .breadcrumb a {
            color: #475569;
        }
        .breadcrumb a:hover {
            color: #1e293b;
        }
        .breadcrumb .active {
            color: #1e293b;
            font-weight: 600;
        }
        .hero {
            background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
            padding: 48px 0 40px;
            color: #fff;
            position: relative;
            overflow: hidden;
        }
        .hero::after {
            content: "🧩";
            position: absolute;
            right: -20px;
            bottom: -20px;
            font-size: 180px;
            opacity: 0.06;
        }
        .hero h1 {
            font-size: 2.6rem;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 16px;
            color: #fbbf24;
        }
        .hero p {
            font-size: 1.15rem;
            max-width: 720px;
            color: #cbd5e1;
            margin-bottom: 20px;
        }
        .hero-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            font-size: 0.9rem;
            color: #94a3b8;
        }
        .hero-meta i {
            margin-right: 6px;
            color: #60a5fa;
        }
        .hero-meta span {
            display: inline-flex;
            align-items: center;
        }
        .search-section {
            background: #fff;
            padding: 28px 0;
            border-bottom: 1px solid #e2e8f0;
        }
        .search-form {
            display: flex;
            gap: 12px;
            max-width: 640px;
            margin: 0 auto;
            flex-wrap: wrap;
        }
        .search-form input {
            flex: 1;
            min-width: 180px;
            padding: 14px 20px;
            border: 2px solid #e2e8f0;
            border-radius: 50px;
            font-size: 1rem;
            outline: none;
            transition: border-color 0.3s, box-shadow 0.3s;
            background: #f8fafc;
        }
        .search-form input:focus {
            border-color: #2563eb;
            box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.1);
        }
        .search-form button {
            padding: 14px 32px;
            background: #2563eb;
            color: #fff;
            border: none;
            border-radius: 50px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.3s, transform 0.2s;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .search-form button:hover {
            background: #1d4ed8;
            transform: translateY(-1px);
        }
        .main-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
            padding: 40px 0;
        }
        article {
            background: #fff;
            border-radius: 16px;
            padding: 32px 36px;
            box-shadow: 0 1px 4px rgba(0, 0, 0, 0.04);
        }
        .sidebar {
            position: sticky;
            top: 100px;
            align-self: start;
        }
        .sidebar-card {
            background: #fff;
            border-radius: 16px;
            padding: 24px;
            box-shadow: 0 1px 4px rgba(0, 0, 0, 0.04);
            margin-bottom: 24px;
        }
        .sidebar-card h3 {
            font-size: 1.1rem;
            margin-bottom: 16px;
            color: #0f172a;
            border-bottom: 2px solid #f1f5f9;
            padding-bottom: 10px;
        }
        .sidebar-card ul {
            list-style: none;
        }
        .sidebar-card li {
            margin-bottom: 10px;
        }
        .sidebar-card a {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.9rem;
            color: #334155;
            padding: 6px 8px;
            border-radius: 8px;
            transition: background 0.2s;
        }
        .sidebar-card a:hover {
            background: #f1f5f9;
            text-decoration: none;
            color: #1e293b;
        }
        .sidebar-card a i {
            color: #2563eb;
            width: 18px;
            text-align: center;
        }
        article h2 {
            font-size: 1.8rem;
            font-weight: 700;
            margin: 40px 0 16px;
            color: #0f172a;
            padding-bottom: 8px;
            border-bottom: 3px solid #fbbf24;
            display: inline-block;
        }
        article h3 {
            font-size: 1.35rem;
            font-weight: 600;
            margin: 32px 0 12px;
            color: #1e293b;
        }
        article h4 {
            font-size: 1.1rem;
            font-weight: 600;
            margin: 24px 0 10px;
            color: #334155;
        }
        article p {
            margin-bottom: 18px;
            color: #334155;
        }
        article ul,
        article ol {
            margin: 12px 0 20px 24px;
            color: #334155;
        }
        article li {
            margin-bottom: 8px;
        }
        article strong {
            color: #0f172a;
        }
        article .highlight-box {
            background: #fef9e7;
            border-left: 4px solid #fbbf24;
            padding: 16px 20px;
            border-radius: 0 12px 12px 0;
            margin: 24px 0;
        }
        article .highlight-box p {
            margin-bottom: 0;
        }
        article .info-box {
            background: #eff6ff;
            border-left: 4px solid #2563eb;
            padding: 16px 20px;
            border-radius: 0 12px 12px 0;
            margin: 24px 0;
        }
        article .info-box p {
            margin-bottom: 0;
        }
        .feature-image {
            margin: 32px 0;
            border-radius: 14px;
            overflow: hidden;
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
        }
        .feature-image figcaption {
            padding: 12px 16px;
            background: #f8fafc;
            font-size: 0.85rem;
            color: #64748b;
            text-align: center;
            border-top: 1px solid #e2e8f0;
        }
        .emoji-big {
            font-size: 1.4rem;
            line-height: 1;
        }
        .table-wrap {
            overflow-x: auto;
            margin: 24px 0;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.95rem;
        }
        th,
        td {
            padding: 12px 16px;
            text-align: left;
            border-bottom: 1px solid #e2e8f0;
        }
        th {
            background: #f1f5f9;
            font-weight: 600;
            color: #0f172a;
        }
        tr:hover {
            background: #f8fafc;
        }
        .rating-section,
        .comment-section {
            background: #f8fafc;
            border-radius: 14px;
            padding: 24px 28px;
            margin: 32px 0 20px;
            border: 1px solid #e2e8f0;
        }
        .rating-section h3,
        .comment-section h3 {
            margin-top: 0;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .star-group {
            display: flex;
            gap: 6px;
            font-size: 1.6rem;
            color: #d1d5db;
            cursor: pointer;
            margin: 12px 0;
        }
        .star-group .star {
            transition: color 0.2s, transform 0.15s;
        }
        .star-group .star:hover,
        .star-group .star.active {
            color: #fbbf24;
            transform: scale(1.1);
        }
        .rating-form button,
        .comment-form button {
            padding: 10px 24px;
            background: #2563eb;
            color: #fff;
            border: none;
            border-radius: 50px;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.2s;
            font-size: 0.95rem;
        }
        .rating-form button:hover,
        .comment-form button:hover {
            background: #1d4ed8;
        }
        .comment-form textarea {
            width: 100%;
            padding: 14px 18px;
            border: 2px solid #e2e8f0;
            border-radius: 12px;
            font-size: 0.95rem;
            font-family: inherit;
            resize: vertical;
            min-height: 100px;
            outline: none;
            transition: border-color 0.3s;
        }
        .comment-form textarea:focus {
            border-color: #2563eb;
        }
        .comment-form input {
            width: 100%;
            padding: 12px 16px;
            border: 2px solid #e2e8f0;
            border-radius: 12px;
            font-size: 0.95rem;
            outline: none;
            transition: border-color 0.3s;
            margin-bottom: 12px;
        }
        .comment-form input:focus {
            border-color: #2563eb;
        }
        .comment-form .form-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 12px;
        }
        footer {
            background: #0f172a;
            color: #e2e8f0;
            padding: 40px 0 24px;
            margin-top: 40px;
        }
        footer .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 32px;
        }
        footer h4 {
            color: #fbbf24;
            font-size: 1.05rem;
            margin-bottom: 16px;
        }
        footer p,
        footer li {
            font-size: 0.9rem;
            color: #cbd5e1;
        }
        footer ul {
            list-style: none;
        }
        footer li {
            margin-bottom: 8px;
        }
        footer a {
            color: #94a3b8;
            transition: color 0.2s;
        }
        footer a:hover {
            color: #fbbf24;
            text-decoration: none;
        }
        friend-link {
            display: block;
            border-top: 1px solid #1e293b;
            padding-top: 24px;
            margin-top: 24px;
        }
        friend-link .friend-list {
            display: flex;
            flex-wrap: wrap;
            gap: 16px 24px;
            justify-content: center;
        }
        friend-link .friend-list a {
            color: #60a5fa;
            font-size: 0.9rem;
        }
        friend-link .friend-list a:hover {
            color: #fbbf24;
        }
        .copyright {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid #1e293b;
            font-size: 0.85rem;
            color: #64748b;
            margin-top: 20px;
        }
        @media (max-width: 992px) {
            .main-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .sidebar {
                position: static;
                display: grid;
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .sidebar-card {
                margin-bottom: 0;
            }
            footer .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
        }
        @media (max-width: 768px) {
            .header-inner {
                flex-wrap: wrap;
            }
            .nav-toggle {
                display: block;
            }
            .nav-menu {
                display: none;
                width: 100%;
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
                padding: 16px 0 8px;
                border-top: 1px solid rgba(255, 255, 255, 0.08);
                margin-top: 8px;
            }
            .nav-menu.open {
                display: flex;
            }
            .nav-menu a {
                padding: 8px 0;
                width: 100%;
                border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            }
            .hero h1 {
                font-size: 1.8rem;
            }
            .hero p {
                font-size: 1rem;
            }
            article {
                padding: 20px 18px;
            }
            article h2 {
                font-size: 1.4rem;
            }
            article h3 {
                font-size: 1.15rem;
            }
            .sidebar {
                grid-template-columns: 1fr;
            }
            footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .search-form {
                flex-direction: column;
            }
            .search-form button {
                width: 100%;
                justify-content: center;
            }
            .comment-form .form-row {
                grid-template-columns: 1fr;
            }
            .breadcrumb ol {
                font-size: 0.75rem;
            }
        }
        @media (max-width: 480px) {
            .container {
                padding: 0 12px;
            }
            .hero h1 {
                font-size: 1.5rem;
            }
            .my-logo {
                font-size: 1.4rem;
            }
            .rating-section,
            .comment-section {
                padding: 16px;
            }
        }
        .fade-up {
            opacity: 0;
            transform: translateY(20px);
            transition: opacity 0.6s ease, transform 0.6s ease;
        }
        .fade-up.visible {
            opacity: 1;
            transform: translateY(0);
        }
        html {
            scroll-padding-top: 80px;
        }
        :focus-visible {
            outline: 3px solid #fbbf24;
            outline-offset: 2px;
        }
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible {
            outline: 3px solid #fbbf24;
            outline-offset: 2px;
        }