* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        :root {
            --primary: #0b3d5f;
            --primary-light: #1a6b8a;
            --secondary: #f4a261;
            --accent: #e76f51;
            --bg: #f8f9fa;
            --bg-card: #ffffff;
            --text: #1a1a2e;
            --text-light: #4a4a6a;
            --border: #dde1e6;
            --shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
            --radius: 16px;
            --radius-sm: 10px;
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, 'Helvetica Neue', Arial, sans-serif;
            --max-width: 1200px;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: var(--font);
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            padding: 0 16px;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: var(--primary-light);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--accent);
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 16px;
        }
        header {
            background: var(--bg-card);
            border-bottom: 2px solid var(--border);
            padding: 12px 0;
            position: sticky;
            top: 0;
            z-index: 100;
            backdrop-filter: blur(8px);
            background: rgba(255, 255, 255, 0.96);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 8px 16px;
        }
        .my-logo {
            font-size: 1.6rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            color: var(--primary);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .my-logo i {
            color: var(--secondary);
            font-size: 1.8rem;
        }
        .my-logo:hover {
            text-decoration: none;
            color: var(--primary-light);
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.8rem;
            color: var(--primary);
            cursor: pointer;
            padding: 4px 8px;
            border-radius: 8px;
            transition: var(--transition);
        }
        .nav-toggle:hover {
            background: var(--border);
        }
        nav {
            display: flex;
            align-items: center;
            gap: 4px 18px;
            flex-wrap: wrap;
        }
        nav a {
            font-weight: 600;
            font-size: 0.95rem;
            padding: 6px 12px;
            border-radius: 8px;
            color: var(--text);
            transition: var(--transition);
            position: relative;
        }
        nav a:hover {
            background: var(--primary);
            color: #fff;
            text-decoration: none;
        }
        nav a i {
            margin-right: 6px;
            font-size: 0.85rem;
        }
        .breadcrumb {
            padding: 14px 0 6px;
            font-size: 0.85rem;
            color: var(--text-light);
            display: flex;
            flex-wrap: wrap;
            gap: 6px 12px;
            list-style: none;
        }
        .breadcrumb li {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .breadcrumb li+li::before {
            content: "›";
            color: var(--text-light);
            font-weight: 700;
            margin-right: 6px;
        }
        .breadcrumb a {
            color: var(--primary-light);
        }
        main {
            padding: 28px 0 48px;
        }
        .article-header {
            margin-bottom: 32px;
        }
        .article-header h1 {
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
            margin-bottom: 12px;
            letter-spacing: -0.5px;
        }
        .article-header .meta {
            display: flex;
            flex-wrap: wrap;
            gap: 12px 24px;
            color: var(--text-light);
            font-size: 0.9rem;
            align-items: center;
        }
        .article-header .meta i {
            margin-right: 6px;
        }
        .last-updated {
            background: var(--secondary);
            color: #1a1a2e;
            padding: 4px 14px;
            border-radius: 40px;
            font-weight: 600;
            font-size: 0.8rem;
            display: inline-block;
        }
        .featured-image {
            margin: 24px 0 32px;
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            background: var(--bg-card);
        }
        .featured-image img {
            width: 100%;
            max-height: 480px;
            object-fit: cover;
        }
        .featured-image figcaption {
            padding: 10px 18px;
            font-size: 0.85rem;
            color: var(--text-light);
            background: var(--bg-card);
            border-top: 1px solid var(--border);
        }
        .content {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 32px 28px;
            box-shadow: var(--shadow);
        }
        .content h2 {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--primary);
            margin-top: 40px;
            margin-bottom: 16px;
            padding-bottom: 8px;
            border-bottom: 3px solid var(--secondary);
        }
        .content h2:first-of-type {
            margin-top: 0;
        }
        .content h3 {
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--primary-light);
            margin-top: 32px;
            margin-bottom: 10px;
        }
        .content h4 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text);
            margin-top: 22px;
            margin-bottom: 8px;
        }
        .content p {
            margin-bottom: 18px;
            font-size: 1rem;
            color: var(--text);
        }
        .content ul,
        .content ol {
            margin: 12px 0 18px 24px;
        }
        .content li {
            margin-bottom: 8px;
        }
        .content blockquote {
            border-left: 5px solid var(--secondary);
            background: #fef9f0;
            padding: 16px 22px;
            margin: 20px 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            font-style: italic;
            color: var(--text-light);
        }
        .content strong {
            color: var(--primary);
        }
        .content .emoji-lg {
            font-size: 1.4rem;
            line-height: 1;
        }
        .highlight-box {
            background: #eef7fb;
            border-radius: var(--radius-sm);
            padding: 20px 24px;
            margin: 24px 0;
            border: 1px solid #cde3ed;
        }
        .highlight-box h4 {
            margin-top: 0;
            color: var(--primary);
        }
        .interactive-section {
            margin-top: 48px;
            padding-top: 32px;
            border-top: 2px solid var(--border);
        }
        .interactive-section h2 {
            border-bottom-color: var(--accent);
        }
        .search-form {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            max-width: 600px;
            margin: 16px 0 32px;
        }
        .search-form input {
            flex: 1;
            min-width: 180px;
            padding: 14px 18px;
            border: 2px solid var(--border);
            border-radius: 50px;
            font-size: 1rem;
            outline: none;
            transition: var(--transition);
            background: var(--bg);
        }
        .search-form input:focus {
            border-color: var(--primary-light);
            box-shadow: 0 0 0 4px rgba(26, 107, 138, 0.15);
        }
        .search-form button {
            background: var(--primary);
            color: #fff;
            border: none;
            padding: 14px 32px;
            border-radius: 50px;
            font-weight: 700;
            font-size: 1rem;
            cursor: pointer;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .search-form button:hover {
            background: var(--primary-light);
            transform: translateY(-2px);
        }
        .comment-form {
            max-width: 700px;
            margin: 16px 0 32px;
            background: var(--bg);
            padding: 24px 28px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border);
        }
        .comment-form .form-row {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            margin-bottom: 16px;
        }
        .comment-form .form-row input {
            flex: 1;
            min-width: 180px;
            padding: 12px 16px;
            border: 2px solid var(--border);
            border-radius: 10px;
            font-size: 0.95rem;
            outline: none;
            transition: var(--transition);
            background: #fff;
        }
        .comment-form .form-row input:focus {
            border-color: var(--primary-light);
        }
        .comment-form textarea {
            width: 100%;
            padding: 12px 16px;
            border: 2px solid var(--border);
            border-radius: 10px;
            font-size: 0.95rem;
            outline: none;
            transition: var(--transition);
            background: #fff;
            min-height: 120px;
            resize: vertical;
            font-family: var(--font);
        }
        .comment-form textarea:focus {
            border-color: var(--primary-light);
        }
        .comment-form button {
            background: var(--secondary);
            color: #1a1a2e;
            border: none;
            padding: 12px 32px;
            border-radius: 50px;
            font-weight: 700;
            font-size: 1rem;
            cursor: pointer;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 10px;
            margin-top: 8px;
        }
        .comment-form button:hover {
            background: #e08f4a;
            transform: translateY(-2px);
        }
        .rating-section {
            max-width: 500px;
            margin: 16px 0 32px;
        }
        .rating-stars {
            display: flex;
            gap: 8px;
            font-size: 2rem;
            color: #ddd;
            cursor: pointer;
            transition: var(--transition);
            direction: rtl;
        }
        .rating-stars i {
            transition: var(--transition);
        }
        .rating-stars i:hover,
        .rating-stars i:hover~i {
            color: var(--secondary);
        }
        .rating-stars.active i.active-star {
            color: var(--secondary);
        }
        .rating-form {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            align-items: center;
            margin-top: 12px;
        }
        .rating-form input {
            padding: 10px 16px;
            border: 2px solid var(--border);
            border-radius: 10px;
            font-size: 0.95rem;
            outline: none;
            flex: 1;
            min-width: 160px;
            background: #fff;
        }
        .rating-form input:focus {
            border-color: var(--primary-light);
        }
        .rating-form button {
            background: var(--primary);
            color: #fff;
            border: none;
            padding: 10px 24px;
            border-radius: 50px;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
        }
        .rating-form button:hover {
            background: var(--primary-light);
        }
        friend-link {
            display: block;
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 24px 28px;
            margin-top: 40px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
        }
        friend-link h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 14px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        friend-link ul {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 8px 20px;
            padding: 0;
            margin: 0;
        }
        friend-link li {
            margin: 0;
        }
        friend-link a {
            color: var(--primary-light);
            font-weight: 500;
            padding: 4px 0;
            display: inline-block;
        }
        friend-link a::before {
            content: "🔗 ";
            font-size: 0.8rem;
        }
        footer {
            padding: 32px 0 24px;
            border-top: 2px solid var(--border);
            margin-top: 32px;
            text-align: center;
            color: var(--text-light);
            font-size: 0.9rem;
        }
        footer .copyright {
            font-weight: 500;
            margin-bottom: 6px;
        }
        footer .copyright i {
            color: var(--accent);
        }
        @media (max-width: 768px) {
            body {
                padding: 0 10px;
            }
            .header-inner {
                flex-wrap: nowrap;
            }
            .nav-toggle {
                display: block;
            }
            nav {
                display: none;
                width: 100%;
                flex-direction: column;
                align-items: stretch;
                gap: 4px;
                padding: 12px 0 4px;
                border-top: 1px solid var(--border);
                margin-top: 8px;
            }
            nav.open {
                display: flex;
            }
            nav a {
                padding: 10px 16px;
                border-radius: 8px;
            }
            .article-header h1 {
                font-size: 1.8rem;
            }
            .content {
                padding: 20px 16px;
            }
            .content h2 {
                font-size: 1.5rem;
            }
            .content h3 {
                font-size: 1.2rem;
            }
            .comment-form {
                padding: 16px;
            }
            .search-form button {
                padding: 12px 20px;
            }
            .rating-stars {
                font-size: 1.6rem;
            }
            .breadcrumb {
                font-size: 0.78rem;
            }
            .my-logo {
                font-size: 1.3rem;
            }
            friend-link ul {
                flex-direction: column;
                gap: 6px;
            }
        }
        @media (max-width: 480px) {
            .article-header h1 {
                font-size: 1.5rem;
            }
            .content {
                padding: 16px 12px;
            }
            .search-form {
                flex-direction: column;
            }
            .search-form input {
                min-width: auto;
            }
            .comment-form .form-row {
                flex-direction: column;
            }
            .comment-form .form-row input {
                min-width: auto;
            }
            .rating-form {
                flex-direction: column;
                align-items: stretch;
            }
            .rating-form input {
                min-width: auto;
            }
        }
        @media (min-width: 769px) {
            .nav-toggle {
                display: none !important;
            }
            nav {
                display: flex !important;
            }
        }
        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            border: 0;
        }
        .text-center {
            text-align: center;
        }
        .mt-2 {
            margin-top: 16px;
        }
        .mb-2 {
            margin-bottom: 16px;
        }
        .gap-1 {
            gap: 8px;
        }
        .flex-wrap {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
        }