*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        :root {
            --primary: #1a3a5c;
            --primary-light: #2d5a8e;
            --secondary: #e8b830;
            --secondary-dark: #d4a520;
            --accent: #ff6b35;
            --bg: #f8f9fa;
            --bg-card: #ffffff;
            --text: #2c3e50;
            --text-light: #6c757d;
            --border: #dee2e6;
            --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
            --radius: 12px;
            --max-width: 1200px;
            --font: 'Segoe UI', system-ui, -apple-system, sans-serif;
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: var(--font);
            color: var(--text);
            background: var(--bg);
            line-height: 1.8;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: var(--primary-light);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--secondary-dark);
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius);
        }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: linear-gradient(135deg, var(--primary) 0%, #0f2a44 100%);
            padding: 16px 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 900;
            color: var(--secondary);
            letter-spacing: -0.5px;
            text-transform: uppercase;
            text-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
            transition: var(--transition);
        }
        .my-logo:hover {
            color: #fff;
            text-decoration: none;
            transform: scale(1.02);
        }
        .my-logo span {
            color: #fff;
            font-weight: 300;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            color: #fff;
            font-size: 1.6rem;
            cursor: pointer;
            padding: 4px 8px;
            border-radius: 6px;
            transition: var(--transition);
        }
        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.1);
        }
        .main-nav {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
            align-items: center;
        }
        .main-nav a {
            color: rgba(255, 255, 255, 0.85);
            padding: 8px 16px;
            border-radius: 8px;
            font-size: 0.92rem;
            font-weight: 500;
            transition: var(--transition);
            white-space: nowrap;
        }
        .main-nav a:hover,
        .main-nav a.active {
            color: #fff;
            background: rgba(255, 255, 255, 0.12);
            text-decoration: none;
        }
        .main-nav a i {
            margin-right: 6px;
        }
        .breadcrumb-wrap {
            background: var(--bg-card);
            border-bottom: 1px solid var(--border);
            padding: 12px 0;
            font-size: 0.85rem;
        }
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            gap: 6px 12px;
            list-style: none;
        }
        .breadcrumb li+li::before {
            content: "›";
            margin-right: 12px;
            color: var(--text-light);
        }
        .breadcrumb a {
            color: var(--text-light);
        }
        .breadcrumb a:hover {
            color: var(--primary-light);
        }
        .breadcrumb .current {
            color: var(--text);
            font-weight: 600;
        }
        .hero {
            background: linear-gradient(135deg, var(--primary) 0%, #0f2a44 100%);
            color: #fff;
            padding: 60px 0 50px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .hero::after {
            content: "♠ ♥ ♦ ♣";
            position: absolute;
            bottom: -20px;
            right: -20px;
            font-size: 12rem;
            opacity: 0.06;
            letter-spacing: 20px;
            pointer-events: none;
            transform: rotate(-10deg);
        }
        .hero h1 {
            font-size: 2.8rem;
            font-weight: 900;
            line-height: 1.2;
            margin-bottom: 16px;
            text-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
        }
        .hero h1 i {
            color: var(--secondary);
            margin: 0 8px;
        }
        .hero p {
            font-size: 1.2rem;
            opacity: 0.9;
            max-width: 720px;
            margin: 0 auto 28px;
            line-height: 1.7;
        }
        .hero .btn-group {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 32px;
            border-radius: 50px;
            font-weight: 700;
            font-size: 1.05rem;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            text-decoration: none;
        }
        .btn-primary {
            background: var(--secondary);
            color: var(--primary);
        }
        .btn-primary:hover {
            background: #fff;
            color: var(--primary);
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(232, 184, 48, 0.4);
            text-decoration: none;
        }
        .btn-outline {
            background: transparent;
            color: #fff;
            border: 2px solid rgba(255, 255, 255, 0.4);
        }
        .btn-outline:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: var(--secondary);
            transform: translateY(-2px);
            text-decoration: none;
        }
        .meta-info {
            display: flex;
            gap: 20px;
            justify-content: center;
            flex-wrap: wrap;
            margin-top: 24px;
            font-size: 0.9rem;
            opacity: 0.75;
        }
        .meta-info i {
            margin-right: 6px;
        }
        .content-wrap {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 40px;
            padding: 40px 0 60px;
        }
        .main-content {
            min-width: 0;
        }
        .sidebar {
            position: sticky;
            top: 110px;
            align-self: start;
        }
        .card {
            background: var(--bg-card);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 32px;
            margin-bottom: 32px;
            transition: var(--transition);
        }
        .card:hover {
            box-shadow: 0 8px 40px rgba(0, 0, 0, 0.12);
        }
        .card h2 {
            font-size: 1.8rem;
            color: var(--primary);
            margin-bottom: 16px;
            padding-bottom: 12px;
            border-bottom: 3px solid var(--secondary);
        }
        .card h2 i {
            color: var(--secondary);
            margin-right: 12px;
        }
        .card h3 {
            font-size: 1.35rem;
            color: var(--primary-light);
            margin: 24px 0 12px;
        }
        .card h3 i {
            margin-right: 8px;
            color: var(--secondary);
        }
        .card h4 {
            font-size: 1.1rem;
            color: var(--text);
            margin: 18px 0 10px;
            font-weight: 700;
        }
        .card p {
            margin-bottom: 16px;
            font-size: 1rem;
            line-height: 1.9;
        }
        .card ul,
        .card ol {
            margin: 12px 0 20px 24px;
        }
        .card li {
            margin-bottom: 8px;
            line-height: 1.7;
        }
        .card .highlight {
            background: linear-gradient(to right, #fef9e7, #fdf2d7);
            padding: 20px 24px;
            border-radius: 10px;
            border-left: 4px solid var(--secondary);
            margin: 20px 0;
        }
        .card .highlight i {
            color: var(--secondary);
            margin-right: 8px;
        }
        .featured-img {
            margin: 24px 0;
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
        }
        .featured-img figcaption {
            padding: 12px 16px;
            background: var(--bg);
            font-size: 0.85rem;
            color: var(--text-light);
            text-align: center;
            font-style: italic;
        }
        .table-wrap {
            overflow-x: auto;
            margin: 20px 0;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.95rem;
        }
        table th {
            background: var(--primary);
            color: #fff;
            padding: 12px 16px;
            text-align: left;
            font-weight: 600;
        }
        table td {
            padding: 10px 16px;
            border-bottom: 1px solid var(--border);
        }
        table tr:hover td {
            background: #f8f4ec;
        }
        .sidebar-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 24px;
            margin-bottom: 24px;
        }
        .sidebar-card h3 {
            font-size: 1.15rem;
            color: var(--primary);
            margin-bottom: 14px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--secondary);
        }
        .sidebar-card ul {
            list-style: none;
        }
        .sidebar-card li {
            margin-bottom: 10px;
        }
        .sidebar-card a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 8px 12px;
            border-radius: 8px;
            background: var(--bg);
            transition: var(--transition);
            font-size: 0.92rem;
        }
        .sidebar-card a:hover {
            background: var(--secondary);
            color: var(--primary);
            text-decoration: none;
            transform: translateX(4px);
        }
        .sidebar-card a i {
            color: var(--secondary);
            width: 20px;
            text-align: center;
        }
        .sidebar-card a:hover i {
            color: var(--primary);
        }
        .search-box {
            display: flex;
            gap: 8px;
            margin-bottom: 16px;
        }
        .search-box input {
            flex: 1;
            padding: 12px 16px;
            border: 2px solid var(--border);
            border-radius: 8px;
            font-size: 0.95rem;
            outline: none;
            transition: var(--transition);
        }
        .search-box input:focus {
            border-color: var(--secondary);
            box-shadow: 0 0 0 4px rgba(232, 184, 48, 0.15);
        }
        .search-box button {
            padding: 12px 20px;
            background: var(--primary);
            color: #fff;
            border: none;
            border-radius: 8px;
            cursor: pointer;
            font-size: 1rem;
            transition: var(--transition);
        }
        .search-box button:hover {
            background: var(--primary-light);
        }
        .comment-form,
        .rating-form {
            display: grid;
            gap: 14px;
            margin-top: 16px;
        }
        .comment-form input,
        .comment-form textarea,
        .rating-form input,
        .rating-form select {
            padding: 12px 16px;
            border: 2px solid var(--border);
            border-radius: 8px;
            font-size: 0.95rem;
            font-family: var(--font);
            outline: none;
            transition: var(--transition);
        }
        .comment-form input:focus,
        .comment-form textarea:focus,
        .rating-form input:focus,
        .rating-form select:focus {
            border-color: var(--secondary);
            box-shadow: 0 0 0 4px rgba(232, 184, 48, 0.12);
        }
        .comment-form textarea {
            min-height: 100px;
            resize: vertical;
        }
        .comment-form button,
        .rating-form button {
            justify-self: start;
            padding: 12px 28px;
            background: var(--secondary);
            color: var(--primary);
            border: none;
            border-radius: 8px;
            font-weight: 700;
            font-size: 0.95rem;
            cursor: pointer;
            transition: var(--transition);
        }
        .comment-form button:hover,
        .rating-form button:hover {
            background: var(--secondary-dark);
            transform: translateY(-1px);
        }
        friend-link {
            display: block;
            padding: 20px 0;
        }
        .friend-links-grid {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-top: 12px;
        }
        .friend-links-grid a {
            padding: 6px 16px;
            background: var(--bg);
            border-radius: 20px;
            font-size: 0.9rem;
            color: var(--text-light);
            transition: var(--transition);
        }
        .friend-links-grid a:hover {
            background: var(--secondary);
            color: var(--primary);
            text-decoration: none;
        }
        .site-footer {
            background: var(--primary);
            color: rgba(255, 255, 255, 0.8);
            padding: 40px 0 30px;
            margin-top: 40px;
        }
        .site-footer .container {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
        }
        .site-footer h4 {
            color: var(--secondary);
            font-size: 1.1rem;
            margin-bottom: 16px;
        }
        .site-footer p {
            font-size: 0.9rem;
            line-height: 1.7;
        }
        .site-footer ul {
            list-style: none;
        }
        .site-footer li {
            margin-bottom: 8px;
        }
        .site-footer a {
            color: rgba(255, 255, 255, 0.7);
            font-size: 0.9rem;
        }
        .site-footer a:hover {
            color: var(--secondary);
        }
        .footer-bottom {
            grid-column: 1 / -1;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 20px;
            margin-top: 20px;
            text-align: center;
            font-size: 0.85rem;
            opacity: 0.7;
        }
        @media (max-width: 992px) {
            .content-wrap {
                grid-template-columns: 1fr;
            }
            .sidebar {
                position: static;
            }
            .hero h1 {
                font-size: 2rem;
            }
            .site-footer .container {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 768px) {
            .nav-toggle {
                display: block;
            }
            .main-nav {
                display: none;
                width: 100%;
                flex-direction: column;
                padding-top: 12px;
                border-top: 1px solid rgba(255, 255, 255, 0.1);
            }
            .main-nav.open {
                display: flex;
            }
            .main-nav a {
                padding: 12px 16px;
                width: 100%;
            }
            .hero h1 {
                font-size: 1.6rem;
            }
            .hero p {
                font-size: 1rem;
            }
            .card {
                padding: 20px;
            }
            .card h2 {
                font-size: 1.4rem;
            }
            .site-footer .container {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .btn {
                padding: 12px 24px;
                font-size: 0.95rem;
            }
            .meta-info {
                flex-direction: column;
                gap: 6px;
                align-items: center;
            }
        }
        @media (max-width: 480px) {
            .hero h1 {
                font-size: 1.3rem;
            }
            .my-logo {
                font-size: 1.3rem;
            }
            .card h2 {
                font-size: 1.2rem;
            }
            .header-inner {
                gap: 8px;
            }
        }
        .text-sm {
            font-size: 0.85rem;
            color: var(--text-light);
        }
        .mb-0 {
            margin-bottom: 0;
        }
        .mt-2 {
            margin-top: 16px;
        }
        .flex-center {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .gap-2 {
            gap: 12px;
        }
        .toc {
            background: var(--bg);
            padding: 20px 24px;
            border-radius: 10px;
            margin: 20px 0;
        }
        .toc ol {
            margin: 8px 0 0 20px;
        }
        .toc li {
            margin-bottom: 6px;
        }
        .toc a {
            color: var(--text);
        }
        .toc a:hover {
            color: var(--secondary-dark);
        }
        .star-rating {
            display: flex;
            gap: 4px;
            font-size: 1.4rem;
            color: #ddd;
            cursor: pointer;
        }
        .star-rating .fa-star.active {
            color: var(--secondary);
        }
        .chip-tip {
            display: inline-block;
            background: var(--secondary);
            color: var(--primary);
            padding: 2px 12px;
            border-radius: 20px;
            font-weight: 700;
            font-size: 0.8rem;
        }