*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        :root {
            --bg-dark: #0b0e14;
            --bg-card: #151e2a;
            --bg-card-hover: #1c2a3a;
            --accent: #f04e23;
            --accent2: #f9a826;
            --accent3: #e6342a;
            --text-primary: #f0f2f5;
            --text-secondary: #b0b8c4;
            --text-muted: #6f7a8a;
            --border-color: #2a3648;
            --font-main: 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            --radius: 12px;
            --shadow: 0 8px 32px rgba(0, 0, 0, 0.6);
            --transition: 0.25s ease;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: var(--font-main);
            background: var(--bg-dark);
            color: var(--text-primary);
            line-height: 1.7;
            padding: 0 16px;
            max-width: 1200px;
            margin: 0 auto;
            min-height: 100vh;
        }
        a {
            color: var(--accent2);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover,
        a:focus-visible {
            color: #ffc857;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius);
        }
        ul,
        ol {
            padding-left: 1.5rem;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.25;
            color: #fff;
            margin-top: 1.8rem;
            margin-bottom: 0.6rem;
        }
        h1 {
            font-size: 2.6rem;
            border-left: 6px solid var(--accent);
            padding-left: 1rem;
            margin-top: 0.6rem;
        }
        h2 {
            font-size: 2rem;
            border-bottom: 2px solid var(--border-color);
            padding-bottom: 0.4rem;
        }
        h3 {
            font-size: 1.5rem;
            color: var(--accent2);
        }
        h4 {
            font-size: 1.2rem;
            color: var(--text-secondary);
        }
        p {
            margin-bottom: 1.2rem;
            color: var(--text-secondary);
        }
        strong,
        b {
            color: #fff;
            font-weight: 700;
        }
        em {
            color: var(--accent2);
            font-style: italic;
        }
        hr {
            border: none;
            border-top: 1px solid var(--border-color);
            margin: 2.5rem 0;
        }
        header {
            padding: 1.2rem 0;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            border-bottom: 1px solid var(--border-color);
            position: relative;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--accent), var(--accent2));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: -0.5px;
            text-transform: uppercase;
        }
        .my-logo:hover {
            text-decoration: none;
            opacity: 0.9;
        }
        .nav-wrapper {
            display: flex;
            align-items: center;
            gap: 1.2rem;
        }
        .nav-list {
            list-style: none;
            display: flex;
            gap: 1.2rem;
            padding: 0;
            margin: 0;
        }
        .nav-list li a {
            color: var(--text-secondary);
            font-weight: 500;
            padding: 0.4rem 0.8rem;
            border-radius: 6px;
            transition: background var(--transition), color var(--transition);
        }
        .nav-list li a:hover,
        .nav-list li a:focus-visible {
            background: var(--bg-card);
            color: #fff;
            text-decoration: none;
        }
        .hamburger {
            display: none;
            background: none;
            border: 2px solid var(--border-color);
            color: #fff;
            font-size: 1.6rem;
            padding: 0.3rem 0.8rem;
            border-radius: 6px;
            cursor: pointer;
            transition: background var(--transition);
        }
        .hamburger:hover {
            background: var(--bg-card);
        }
        .breadcrumb {
            padding: 0.8rem 0;
            font-size: 0.9rem;
            color: var(--text-muted);
            display: flex;
            flex-wrap: wrap;
            gap: 0.4rem 0.6rem;
            list-style: none;
        }
        .breadcrumb li+li::before {
            content: "▸";
            margin-right: 0.6rem;
            color: var(--text-muted);
        }
        .breadcrumb a {
            color: var(--text-secondary);
        }
        .breadcrumb a:hover {
            color: var(--accent2);
        }
        .breadcrumb .current {
            color: var(--accent);
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2.5rem;
            margin: 2rem 0;
        }
        .main-article {
            min-width: 0;
        }
        .sidebar {
            position: sticky;
            top: 1.5rem;
            align-self: start;
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 1.5rem;
            border: 1px solid var(--border-color);
            max-height: 90vh;
            overflow-y: auto;
        }
        .sidebar h3 {
            font-size: 1.2rem;
            margin-top: 0;
            border-bottom: 1px solid var(--border-color);
            padding-bottom: 0.5rem;
            margin-bottom: 1rem;
        }
        .sidebar ul {
            list-style: none;
            padding: 0;
        }
        .sidebar ul li {
            margin-bottom: 0.6rem;
        }
        .sidebar ul li a {
            color: var(--text-secondary);
            font-size: 0.95rem;
            display: block;
            padding: 0.3rem 0;
            border-left: 2px solid transparent;
            padding-left: 0.6rem;
            transition: all var(--transition);
        }
        .sidebar ul li a:hover {
            color: var(--accent2);
            border-left-color: var(--accent2);
            text-decoration: none;
        }
        .feature-image {
            margin: 2rem 0;
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            background: var(--bg-card);
            padding: 0.5rem;
        }
        .feature-image img {
            border-radius: calc(var(--radius) - 4px);
        }
        .feature-image figcaption {
            padding: 0.8rem 0.5rem 0.3rem;
            font-size: 0.9rem;
            color: var(--text-muted);
            text-align: center;
            font-style: italic;
        }
        .card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 1.5rem;
            margin: 1.8rem 0;
            border: 1px solid var(--border-color);
            transition: transform var(--transition), box-shadow var(--transition);
        }
        .card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow);
        }
        .card h3 {
            margin-top: 0;
        }
        .data-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 1rem;
            margin: 1.5rem 0;
        }
        .data-item {
            background: var(--bg-dark);
            border-radius: 8px;
            padding: 1rem 1.2rem;
            text-align: center;
            border: 1px solid var(--border-color);
        }
        .data-item .number {
            font-size: 2rem;
            font-weight: 800;
            color: var(--accent2);
            display: block;
        }
        .data-item .label {
            font-size: 0.85rem;
            color: var(--text-muted);
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }
        .table-wrap {
            overflow-x: auto;
            margin: 1.5rem 0;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            background: var(--bg-card);
            border-radius: var(--radius);
            overflow: hidden;
            font-size: 0.95rem;
        }
        th,
        td {
            padding: 0.8rem 1rem;
            text-align: left;
            border-bottom: 1px solid var(--border-color);
        }
        th {
            background: #1a2533;
            color: var(--accent2);
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.3px;
        }
        tr:hover td {
            background: var(--bg-card-hover);
        }
        .form-block {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 1.8rem;
            border: 1px solid var(--border-color);
            margin: 2rem 0;
        }
        .form-block label {
            display: block;
            font-weight: 600;
            margin-bottom: 0.3rem;
            color: #fff;
        }
        .form-block input,
        .form-block textarea,
        .form-block select {
            width: 100%;
            padding: 0.7rem 1rem;
            border-radius: 8px;
            border: 1px solid var(--border-color);
            background: var(--bg-dark);
            color: var(--text-primary);
            font-family: inherit;
            font-size: 1rem;
            transition: border var(--transition);
            margin-bottom: 1rem;
        }
        .form-block input:focus,
        .form-block textarea:focus,
        .form-block select:focus {
            outline: none;
            border-color: var(--accent2);
            box-shadow: 0 0 0 3px rgba(249, 168, 38, 0.2);
        }
        .form-block textarea {
            min-height: 120px;
            resize: vertical;
        }
        .form-block .btn {
            background: var(--accent);
            color: #fff;
            border: none;
            padding: 0.8rem 2rem;
            border-radius: 8px;
            font-weight: 700;
            font-size: 1rem;
            cursor: pointer;
            transition: background var(--transition), transform var(--transition);
        }
        .form-block .btn:hover {
            background: #c73d1a;
            transform: scale(1.02);
        }
        .form-block .btn-secondary {
            background: var(--bg-dark);
            border: 1px solid var(--border-color);
            color: var(--text-secondary);
        }
        .form-block .btn-secondary:hover {
            background: var(--bg-card-hover);
        }
        .star-rating {
            display: flex;
            gap: 0.3rem;
            font-size: 1.8rem;
            color: var(--text-muted);
            cursor: pointer;
            margin-bottom: 1rem;
        }
        .star-rating .star {
            transition: color var(--transition), transform var(--transition);
        }
        .star-rating .star:hover,
        .star-rating .star.active {
            color: var(--accent2);
            transform: scale(1.1);
        }
        friend-link {
            display: block;
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 1.2rem 1.5rem;
            border: 1px solid var(--border-color);
            margin: 1.2rem 0;
        }
        friend-link a {
            display: inline-block;
            margin-right: 1.2rem;
            padding: 0.2rem 0;
        }
        footer {
            border-top: 1px solid var(--border-color);
            padding: 2rem 0 1.5rem;
            margin-top: 3rem;
            text-align: center;
            color: var(--text-muted);
            font-size: 0.9rem;
        }
        footer .copyright {
            margin-top: 1rem;
            font-size: 0.85rem;
        }
        @media (max-width: 900px) {
            .content-grid {
                grid-template-columns: 1fr;
            }
            .sidebar {
                position: static;
                max-height: none;
                order: 2;
            }
            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.6rem;
            }
            h3 {
                font-size: 1.25rem;
            }
        }
        @media (max-width: 680px) {
            .nav-list {
                display: none;
                flex-direction: column;
                background: var(--bg-card);
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                padding: 1rem 1.2rem;
                border-radius: 0 0 var(--radius) var(--radius);
                border: 1px solid var(--border-color);
                z-index: 100;
                gap: 0.3rem;
            }
            .nav-list.show {
                display: flex;
            }
            .hamburger {
                display: block;
            }
            header {
                position: relative;
            }
            .data-grid {
                grid-template-columns: 1fr 1fr;
            }
            .my-logo {
                font-size: 1.4rem;
            }
        }
        @media (max-width: 420px) {
            body {
                padding: 0 10px;
            }
            h1 {
                font-size: 1.6rem;
                padding-left: 0.6rem;
            }
            .data-grid {
                grid-template-columns: 1fr;
            }
            .form-block {
                padding: 1rem;
            }
        }
        .text-accent {
            color: var(--accent2);
        }
        .text-muted {
            color: var(--text-muted);
        }
        .mt-0 {
            margin-top: 0;
        }
        .mb-0 {
            margin-bottom: 0;
        }
        .flex-between {
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            align-items: center;
        }
        .gap-1 {
            gap: 1rem;
        }
        .last-updated {
            font-size: 0.85rem;
            color: var(--text-muted);
            background: var(--bg-card);
            display: inline-block;
            padding: 0.3rem 1rem;
            border-radius: 20px;
            border: 1px solid var(--border-color);
            margin-bottom: 1.2rem;
        }
        ::-webkit-scrollbar {
            width: 8px;
        }
        ::-webkit-scrollbar-track {
            background: var(--bg-dark);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--border-color);
            border-radius: 4px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--text-muted);
        }
        blockquote {
            border-left: 4px solid var(--accent);
            padding: 1rem 1.5rem;
            margin: 1.5rem 0;
            background: var(--bg-card);
            border-radius: 0 var(--radius) var(--radius) 0;
            font-style: italic;
            color: var(--text-secondary);
        }
        blockquote cite {
            display: block;
            margin-top: 0.6rem;
            font-size: 0.9rem;
            color: var(--accent2);
            font-style: normal;
        }
        .highlight-box {
            background: linear-gradient(135deg, rgba(240, 78, 35, 0.12), rgba(249, 168, 38, 0.08));
            border: 1px solid var(--accent);
            border-radius: var(--radius);
            padding: 1.2rem 1.5rem;
            margin: 1.5rem 0;
        }