*,
        *::before,
        *::after {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        :root {
            --uno-red: #e11a2a;
            --uno-yellow: #ffd400;
            --uno-blue: #1e6fd9;
            --uno-green: #21a057;
            --dark: #111827;
            --light-bg: #f8f9fc;
            --gray: #6b7280;
            --border: #e5e7eb;
            --white: #ffffff;
            --shadow: 0 4px 20px rgba(0, 0, 0, .08);
            --radius: 16px;
            --transition: all .25s ease;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            color: #1f2937;
            background: var(--light-bg);
            line-height: 1.75;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 12px;
        }
        a {
            color: var(--uno-blue);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--uno-red);
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: var(--white);
            box-shadow: 0 2px 12px rgba(0, 0, 0, .06);
            position: sticky;
            top: 0;
            z-index: 100;
        }
        .header-top {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 14px 0;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            letter-spacing: -1px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .my-logo .logo-icon {
            width: 40px;
            height: 40px;
            background: var(--uno-red);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--white);
            font-size: 1.2rem;
            box-shadow: 0 2px 8px rgba(225, 26, 42, .35);
        }
        .my-logo span:nth-child(2) {
            color: var(--uno-red);
        }
        .my-logo span:nth-child(3) {
            color: var(--uno-blue);
        }
        .nav-links {
            display: flex;
            list-style: none;
            gap: 6px;
        }
        .nav-links a {
            padding: 8px 16px;
            border-radius: 24px;
            font-weight: 500;
            color: #374151;
            font-size: .92rem;
            transition: var(--transition);
        }
        .nav-links a:hover,
        .nav-links a.active {
            background: var(--uno-red);
            color: var(--white);
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 1.6rem;
            color: #374151;
            cursor: pointer;
            padding: 6px 10px;
            border-radius: 8px;
        }
        .hamburger:hover {
            background: #f3f4f6;
        }
        .breadcrumb-wrap {
            background: #f8f9fc;
            border-bottom: 1px solid var(--border);
            padding: 10px 0;
            font-size: .85rem;
        }
        .breadcrumb-wrap nav {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: wrap;
        }
        .breadcrumb-wrap a {
            color: var(--uno-blue);
        }
        .breadcrumb-wrap i {
            font-size: .7rem;
            color: var(--gray);
            margin: 0 4px;
        }
        .breadcrumb-wrap span {
            color: var(--gray);
        }
        .hero {
            background: linear-gradient(135deg, #e11a2a 0%, #c70e1e 50%, #8f0a14 100%);
            color: var(--white);
            padding: 70px 0 60px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .hero::before {
            content: "UNO";
            position: absolute;
            font-size: 16rem;
            font-weight: 900;
            color: rgba(255, 255, 255, .06);
            right: -40px;
            bottom: -40px;
            letter-spacing: -5px;
            line-height: 1;
        }
        .hero h1 {
            font-size: 3.2rem;
            font-weight: 900;
            margin-bottom: 14px;
            letter-spacing: -1px;
            text-shadow: 0 4px 24px rgba(0, 0, 0, .25);
        }
        .hero p.lead {
            font-size: 1.2rem;
            max-width: 700px;
            margin: 0 auto 30px;
            opacity: .95;
            line-height: 1.6;
        }
        .hero-badges {
            display: flex;
            justify-content: center;
            gap: 18px;
            flex-wrap: wrap;
            margin-bottom: 30px;
        }
        .hero-badges span {
            background: rgba(255, 255, 255, .18);
            backdrop-filter: blur(4px);
            padding: 6px 16px;
            border-radius: 30px;
            font-size: .88rem;
            font-weight: 500;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .hero-badges i {
            color: var(--uno-yellow);
        }
        .btn-primary {
            display: inline-block;
            background: var(--uno-yellow);
            color: var(--dark);
            padding: 12px 34px;
            border-radius: 30px;
            font-weight: 700;
            font-size: 1rem;
            box-shadow: 0 4px 16px rgba(0, 0, 0, .18);
            transition: var(--transition);
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(0, 0, 0, .25);
            color: var(--dark);
        }
        .main-grid {
            display: grid;
            grid-template-columns: 260px 1fr;
            gap: 36px;
            padding: 50px 20px;
            max-width: 1200px;
            margin: 0 auto;
        }
        aside.toc {
            position: sticky;
            top: 90px;
            align-self: start;
            background: var(--white);
            border-radius: var(--radius);
            padding: 24px 20px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
        }
        aside.toc h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 14px;
            color: var(--dark);
            border-bottom: 2px solid var(--uno-yellow);
            padding-bottom: 10px;
        }
        aside.toc ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }
        aside.toc a {
            display: block;
            padding: 6px 8px;
            border-radius: 8px;
            font-size: .9rem;
            color: #4b5563;
            border-left: 3px solid transparent;
            transition: var(--transition);
        }
        aside.toc a:hover {
            background: #f9fafb;
            color: var(--uno-red);
            border-left-color: var(--uno-red);
        }
        .main-content {
            background: var(--white);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 40px 44px;
            border: 1px solid var(--border);
        }
        .main-content h2 {
            font-size: 2rem;
            font-weight: 800;
            margin: 56px 0 18px;
            padding-bottom: 12px;
            border-bottom: 3px solid var(--uno-yellow);
            color: var(--dark);
            letter-spacing: -.5px;
        }
        .main-content h2:first-child {
            margin-top: 0;
        }
        .main-content h3 {
            font-size: 1.35rem;
            font-weight: 700;
            margin: 32px 0 12px;
            color: var(--uno-red);
        }
        .main-content h4 {
            font-size: 1.08rem;
            font-weight: 700;
            margin: 24px 0 10px;
            color: #374151;
        }
        .main-content p {
            margin-bottom: 18px;
            font-size: 1rem;
            color: #374151;
        }
        .main-content ul,
        .main-content ol {
            margin: 0 0 20px 22px;
        }
        .main-content li {
            margin-bottom: 6px;
        }
        .main-content blockquote {
            border-left: 4px solid var(--uno-red);
            background: #fef2f2;
            padding: 18px 22px;
            border-radius: 0 12px 12px 0;
            margin: 24px 0;
            font-style: italic;
            color: #4b5563;
        }
        .main-content blockquote p {
            margin: 0;
        }
        .highlight-box {
            background: #f0f9ff;
            border: 1px solid #bae6fd;
            border-radius: 12px;
            padding: 20px 24px;
            margin: 28px 0;
        }
        .highlight-box p {
            margin: 0;
        }
        .code-block {
            background: #f8fafc;
            border: 1px solid var(--border);
            border-radius: 10px;
            padding: 20px;
            font-family: 'Courier New', monospace;
            font-size: .9rem;
            overflow-x: auto;
            margin: 20px 0;
            color: #334155;
        }
        .table-responsive {
            overflow-x: auto;
            margin: 24px 0;
            border-radius: 12px;
            border: 1px solid var(--border);
        }
        table {
            width: 100%;
            border-collapse: collapse;
            font-size: .95rem;
            min-width: 480px;
        }
        th {
            background: var(--uno-red);
            color: var(--white);
            padding: 12px 16px;
            text-align: left;
            font-weight: 600;
        }
        td {
            padding: 12px 16px;
            border-bottom: 1px solid var(--border);
        }
        tr:nth-child(even) {
            background: #f9fafb;
        }
        tr:hover {
            background: #f3f4f6;
        }
        .featured-image {
            margin: 32px 0;
            border-radius: 16px;
            overflow: hidden;
            box-shadow: 0 8px 30px rgba(0, 0, 0, .12);
        }
        .featured-image img {
            width: 100%;
            object-fit: cover;
        }
        .img-caption {
            text-align: center;
            font-size: .85rem;
            color: var(--gray);
            padding: 10px 0;
            background: #f8fafc;
            border-radius: 0 0 12px 12px;
        }
        .emoji-list li {
            list-style: none;
            padding-left: 28px;
            position: relative;
            margin-bottom: 8px;
        }
        .emoji-list li::before {
            content: "🎯";
            position: absolute;
            left: 0;
            top: 0;
        }
        .form-section {
            background: #f8fafc;
            border-radius: var(--radius);
            padding: 32px;
            margin: 48px 0 24px;
            border: 1px solid var(--border);
        }
        .form-section h3 {
            margin-top: 0;
            color: var(--dark);
        }
        .form-group {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
            margin-bottom: 16px;
        }
        .form-group label {
            font-size: .9rem;
            font-weight: 600;
            margin-bottom: 6px;
            display: block;
            color: #374151;
        }
        .form-group input,
        .form-group select,
        .form-group textarea {
            width: 100%;
            padding: 10px 14px;
            border: 1px solid #d1d5db;
            border-radius: 8px;
            font-size: .95rem;
            transition: var(--transition);
            font-family: inherit;
        }
        .form-group input:focus,
        .form-group select:focus,
        .form-group textarea:focus {
            outline: none;
            border-color: var(--uno-blue);
            box-shadow: 0 0 0 3px rgba(30, 111, 217, .12);
        }
        .form-group textarea {
            resize: vertical;
            min-height: 100px;
            grid-column: 1 / -1;
        }
        .form-group.full {
            grid-column: 1 / -1;
        }
        .btn-submit {
            background: var(--uno-red);
            color: var(--white);
            border: none;
            padding: 12px 28px;
            border-radius: 30px;
            font-size: .95rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
        }
        .btn-submit:hover {
            background: #c70e1e;
            transform: translateY(-1px);
        }
        .rating-stars {
            display: flex;
            gap: 4px;
            font-size: 1.6rem;
            color: var(--uno-yellow);
            cursor: pointer;
            justify-content: center;
            margin-top: 8px;
        }
        .rating-stars i {
            transition: transform .2s;
        }
        .rating-stars i:hover {
            transform: scale(1.2);
        }
        .search-box {
            display: flex;
            background: var(--white);
            border-radius: 40px;
            box-shadow: 0 2px 12px rgba(0, 0, 0, .08);
            overflow: hidden;
            max-width: 420px;
            margin: 0 auto;
            border: 1px solid var(--border);
        }
        .search-box input {
            flex: 1;
            border: none;
            padding: 12px 18px;
            font-size: .95rem;
            outline: none;
        }
        .search-box button {
            background: var(--uno-red);
            color: var(--white);
            border: none;
            padding: 0 20px;
            font-size: 1rem;
            cursor: pointer;
            transition: var(--transition);
        }
        .search-box button:hover {
            background: #c70e1e;
        }
        footer {
            background: #0f172a;
            color: #9ca3af;
            padding: 60px 20px 0;
        }
        .footer-grid {
            max-width: 1200px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 40px;
            padding-bottom: 40px;
        }
        .footer-col h4 {
            color: var(--white);
            font-size: 1.1rem;
            margin-bottom: 16px;
            font-weight: 700;
        }
        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .footer-col a {
            color: #cbd5e1;
            font-size: .9rem;
            transition: var(--transition);
        }
        .footer-col a:hover {
            color: var(--uno-yellow);
        }
        .footer-bottom {
            border-top: 1px solid #1e293b;
            padding: 24px 0;
            text-align: center;
            font-size: .85rem;
            color: #64748b;
            max-width: 1200px;
            margin: 0 auto;
        }
        friend-link {
            display: block;
            padding: 16px 0;
            border-top: 1px solid #1e293b;
            margin-top: 10px;
            max-width: 1200px;
            margin-left: auto;
            margin-right: auto;
            color: #64748b;
            font-size: .85rem;
        }
        friend-link a {
            color: #cbd5e1;
            margin-right: 12px;
            text-decoration: underline;
            text-underline-offset: 3px;
        }
        friend-link a:hover {
            color: var(--uno-yellow);
        }
        .back-to-top {
            position: fixed;
            bottom: 24px;
            right: 24px;
            background: var(--uno-red);
            color: var(--white);
            width: 40px;
            height: 40px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1rem;
            box-shadow: 0 4px 12px rgba(225, 26, 42, .4);
            opacity: 0;
            visibility: hidden;
            transition: var(--transition);
            z-index: 50;
        }
        .back-to-top.visible {
            opacity: 1;
            visibility: visible;
        }
        .back-to-top:hover {
            transform: translateY(-4px);
            color: var(--white);
        }
        @media (max-width: 992px) {
            .main-grid {
                grid-template-columns: 1fr;
                padding: 20px 12px;
            }
            aside.toc {
                position: static;
                margin-bottom: 20px;
            }
            aside.toc ul {
                flex-direction: row;
                flex-wrap: wrap;
                gap: 4px;
            }
            aside.toc a {
                border-radius: 20px;
                border: 1px solid var(--border);
                padding: 4px 14px;
            }
        }
        @media (max-width: 768px) {
            .header-top {
                flex-wrap: wrap;
            }
            .nav-links {
                display: none;
                width: 100%;
                flex-direction: column;
                background: var(--white);
                border-radius: 0 0 12px 12px;
                padding: 12px 0;
                box-shadow: 0 8px 20px rgba(0, 0, 0, .08);
            }
            .nav-links.open {
                display: flex;
            }
            .nav-links a {
                padding: 12px 20px;
                border-radius: 0;
                border-left: 4px solid transparent;
            }
            .nav-links a:hover {
                border-left-color: var(--uno-red);
                background: #f9fafb;
                color: var(--uno-red);
            }
            .hamburger {
                display: block;
            }
            .hero h1 {
                font-size: 2.2rem;
            }
            .hero::before {
                font-size: 8rem;
            }
            .main-content {
                padding: 24px 18px;
                border-radius: 10px;
            }
            .main-content h2 {
                font-size: 1.5rem;
            }
            .form-group {
                grid-template-columns: 1fr;
            }
            .form-group textarea {
                grid-column: 1;
            }
        }
        @media (max-width: 480px) {
            .hero {
                padding: 48px 12px;
            }
            .hero p.lead {
                font-size: 1rem;
            }
            .breadcrumb-wrap {
                font-size: .75rem;
            }
            .container,
            .main-grid {
                padding-left: 8px;
                padding-right: 8px;
            }
        }