*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            background: #f5f7fa;
            color: #1a1a2e;
            line-height: 1.7;
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: #e63946;
            text-decoration: none;
            transition: color 0.25s ease;
        }
        a:hover,
        a:focus {
            color: #b71c1c;
            text-decoration: underline;
        }
        ul,
        ol {
            padding-left: 1.5rem;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.25;
            color: #0d1b2a;
            font-weight: 700;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.25rem;
        }
        .site-header {
            background: linear-gradient(135deg, #0d1b2a 0%, #1b2838 100%);
            padding: 0.75rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 0.75rem;
        }
        .my-logo {
            font-size: 1.6rem;
            font-weight: 800;
            color: #ffd60a;
            letter-spacing: -0.5px;
            text-shadow: 0 2px 8px rgba(255, 214, 10, 0.25);
            transition: opacity 0.3s ease;
        }
        .my-logo:hover {
            opacity: 0.85;
            text-decoration: none;
        }
        .my-logo span {
            color: #ffffff;
            font-weight: 300;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: 2px solid rgba(255, 255, 255, 0.25);
            color: #fff;
            font-size: 1.4rem;
            padding: 0.4rem 0.8rem;
            border-radius: 6px;
            cursor: pointer;
            transition: background 0.3s ease;
        }
        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.08);
        }
        .nav-menu {
            display: flex;
            align-items: center;
            gap: 0.25rem;
            flex-wrap: wrap;
            list-style: none;
            padding: 0;
        }
        .nav-menu li a {
            display: block;
            padding: 0.5rem 1rem;
            color: #e0e0e0;
            font-size: 0.9rem;
            font-weight: 500;
            border-radius: 6px;
            transition: background 0.25s, color 0.25s;
        }
        .nav-menu li a:hover,
        .nav-menu li a:focus {
            background: rgba(255, 214, 10, 0.12);
            color: #ffd60a;
            text-decoration: none;
        }
        .breadcrumb {
            background: #e9ecef;
            padding: 0.6rem 1.25rem;
            font-size: 0.85rem;
            border-bottom: 1px solid #dee2e6;
            display: flex;
            flex-wrap: wrap;
            gap: 0.3rem 0.6rem;
        }
        .breadcrumb a {
            color: #495057;
        }
        .breadcrumb a:hover {
            color: #e63946;
        }
        .breadcrumb .separator {
            color: #adb5bd;
            margin: 0 0.15rem;
        }
        .breadcrumb .current {
            color: #6c757d;
            font-weight: 600;
        }
        .main-content {
            flex: 1;
            padding: 2rem 0 3rem;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2.5rem;
        }
        @media (max-width: 992px) {
            .content-grid {
                grid-template-columns: 1fr;
            }
        }
        .article-body h1 {
            font-size: 2.4rem;
            margin-bottom: 0.5rem;
            color: #0d1b2a;
            border-bottom: 4px solid #ffd60a;
            padding-bottom: 0.5rem;
            display: inline-block;
        }
        .article-body h2 {
            font-size: 1.8rem;
            margin: 2.5rem 0 1rem;
            color: #1b2838;
            border-left: 6px solid #e63946;
            padding-left: 1rem;
        }
        .article-body h3 {
            font-size: 1.4rem;
            margin: 2rem 0 0.75rem;
            color: #2c3e50;
        }
        .article-body h4 {
            font-size: 1.15rem;
            margin: 1.5rem 0 0.5rem;
            color: #34495e;
            font-weight: 600;
        }
        .article-body p {
            margin-bottom: 1.2rem;
            color: #2d3436;
        }
        .article-body ul,
        .article-body ol {
            margin-bottom: 1.2rem;
        }
        .article-body li {
            margin-bottom: 0.4rem;
        }
        .article-body .feature-box {
            background: #ffffff;
            border-radius: 16px;
            padding: 1.5rem 1.8rem;
            margin: 1.8rem 0;
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
            border-left: 5px solid #ffd60a;
        }
        .article-body .highlight {
            background: linear-gradient(120deg, #fff9db 0%, #fff3bf 100%);
            padding: 0.1rem 0.4rem;
            border-radius: 4px;
            font-weight: 600;
        }
        .article-body .emoji-big {
            font-size: 1.4rem;
            margin-right: 0.3rem;
        }
        .article-body img {
            border-radius: 14px;
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
            margin: 1.8rem auto;
            width: 100%;
            max-width: 780px;
            object-fit: cover;
        }
        .article-body .img-caption {
            text-align: center;
            font-size: 0.9rem;
            color: #6c757d;
            margin-top: -1.2rem;
            margin-bottom: 1.8rem;
        }
        .sidebar {
            background: #ffffff;
            border-radius: 16px;
            padding: 1.8rem 1.5rem;
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
            position: sticky;
            top: 6rem;
            align-self: start;
            height: fit-content;
            max-height: calc(100vh - 8rem);
            overflow-y: auto;
        }
        .sidebar h3 {
            font-size: 1.2rem;
            margin-bottom: 1.2rem;
            color: #0d1b2a;
            border-bottom: 3px solid #ffd60a;
            padding-bottom: 0.4rem;
        }
        .sidebar ul {
            list-style: none;
            padding: 0;
        }
        .sidebar ul li {
            margin-bottom: 0.5rem;
        }
        .sidebar ul li a {
            display: block;
            padding: 0.4rem 0.6rem;
            background: #f8f9fa;
            border-radius: 8px;
            font-size: 0.9rem;
            color: #2c3e50;
            transition: background 0.2s, color 0.2s;
        }
        .sidebar ul li a:hover {
            background: #ffd60a;
            color: #0d1b2a;
            text-decoration: none;
        }
        .search-form {
            display: flex;
            gap: 0.5rem;
            margin: 1.5rem 0 2rem;
            background: #ffffff;
            padding: 0.5rem 0.5rem 0.5rem 1.2rem;
            border-radius: 50px;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
            border: 1px solid #dee2e6;
            max-width: 600px;
        }
        .search-form input[type="text"] {
            flex: 1;
            border: none;
            outline: none;
            font-size: 1rem;
            padding: 0.5rem 0;
            background: transparent;
            color: #1a1a2e;
        }
        .search-form input[type="text"]::placeholder {
            color: #adb5bd;
        }
        .search-form button {
            background: #e63946;
            color: #fff;
            border: none;
            padding: 0.6rem 1.8rem;
            border-radius: 40px;
            font-weight: 600;
            font-size: 0.95rem;
            cursor: pointer;
            transition: background 0.25s, transform 0.15s;
        }
        .search-form button:hover {
            background: #b71c1c;
            transform: scale(0.97);
        }
        .user-feedback {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 2rem;
            margin: 3rem 0 2rem;
            padding: 2rem 0;
            border-top: 2px solid #e9ecef;
        }
        @media (max-width: 700px) {
            .user-feedback {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }
        }
        .feedback-card {
            background: #ffffff;
            border-radius: 16px;
            padding: 1.8rem 2rem;
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.05);
        }
        .feedback-card h3 {
            margin-bottom: 1rem;
            font-size: 1.2rem;
            color: #0d1b2a;
        }
        .feedback-card textarea,
        .feedback-card input[type="text"],
        .feedback-card input[type="number"],
        .feedback-card select {
            width: 100%;
            padding: 0.7rem 1rem;
            border: 1px solid #ced4da;
            border-radius: 10px;
            font-size: 0.95rem;
            font-family: inherit;
            transition: border-color 0.25s;
            background: #f8f9fa;
            margin-bottom: 0.8rem;
        }
        .feedback-card textarea:focus,
        .feedback-card input:focus,
        .feedback-card select:focus {
            outline: none;
            border-color: #ffd60a;
            background: #fff;
        }
        .feedback-card textarea {
            resize: vertical;
            min-height: 100px;
        }
        .feedback-card .btn-submit {
            background: #0d1b2a;
            color: #fff;
            border: none;
            padding: 0.7rem 2rem;
            border-radius: 40px;
            font-weight: 600;
            font-size: 0.95rem;
            cursor: pointer;
            transition: background 0.25s, transform 0.15s;
            width: 100%;
        }
        .feedback-card .btn-submit:hover {
            background: #1b2838;
            transform: scale(0.98);
        }
        .star-rating {
            display: flex;
            gap: 0.3rem;
            font-size: 1.8rem;
            color: #e9ecef;
            cursor: pointer;
            margin-bottom: 0.8rem;
            direction: rtl;
            justify-content: flex-end;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            transition: color 0.2s;
            color: #dee2e6;
            cursor: pointer;
        }
        .star-rating input:checked~label,
        .star-rating label:hover,
        .star-rating label:hover~label {
            color: #ffd60a;
        }
        .site-footer {
            background: #0d1b2a;
            color: #ced4da;
            padding: 2.5rem 0 1.5rem;
            margin-top: 3rem;
        }
        .footer-inner {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 2rem;
        }
        @media (max-width: 768px) {
            .footer-inner {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }
        }
        .footer-inner h4 {
            color: #ffd60a;
            margin-bottom: 0.8rem;
            font-size: 1.1rem;
        }
        .footer-inner p,
        .footer-inner a {
            font-size: 0.9rem;
            color: #adb5bd;
        }
        .footer-inner a:hover {
            color: #ffd60a;
        }
        friend-link {
            display: block;
            background: rgba(255, 255, 255, 0.04);
            border-radius: 12px;
            padding: 1rem 1.2rem;
            margin-top: 1rem;
            border: 1px solid rgba(255, 255, 255, 0.06);
        }
        friend-link a {
            display: inline-block;
            margin-right: 1.2rem;
            margin-bottom: 0.4rem;
            color: #ffd60a;
            font-weight: 500;
        }
        friend-link a:hover {
            color: #fff;
            text-decoration: underline;
        }
        .copyright {
            text-align: center;
            padding-top: 1.8rem;
            margin-top: 1.8rem;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            font-size: 0.85rem;
            color: #6c757d;
        }
        @media (max-width: 768px) {
            .nav-toggle {
                display: block;
            }
            .nav-menu {
                display: none;
                flex-direction: column;
                width: 100%;
                background: rgba(13, 27, 42, 0.98);
                border-radius: 12px;
                padding: 0.8rem 0;
                margin-top: 0.5rem;
                border: 1px solid rgba(255, 255, 255, 0.06);
            }
            .nav-menu.open {
                display: flex;
            }
            .nav-menu li a {
                padding: 0.6rem 1.2rem;
            }
            .article-body h1 {
                font-size: 1.7rem;
            }
            .article-body h2 {
                font-size: 1.4rem;
            }
            .article-body h3 {
                font-size: 1.15rem;
            }
            .article-body h4 {
                font-size: 1rem;
            }
            .search-form {
                flex-wrap: wrap;
                border-radius: 16px;
                padding: 0.8rem;
            }
            .search-form input[type="text"] {
                width: 100%;
            }
            .search-form button {
                width: 100%;
            }
        }
        @media (max-width: 480px) {
            .container {
                padding: 0 0.9rem;
            }
            .my-logo {
                font-size: 1.2rem;
            }
            .article-body h1 {
                font-size: 1.4rem;
            }
            .feedback-card {
                padding: 1.2rem;
            }
        }
        ::-webkit-scrollbar {
            width: 6px;
        }
        ::-webkit-scrollbar-track {
            background: #f1f1f1;
        }
        ::-webkit-scrollbar-thumb {
            background: #888;
            border-radius: 4px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: #555;
        }
        .last-updated {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: #e9ecef;
            padding: 0.4rem 1.2rem;
            border-radius: 40px;
            font-size: 0.85rem;
            color: #495057;
            margin-bottom: 1.2rem;
        }
        .last-updated i {
            color: #e63946;
        }
        .info-table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.5rem 0;
            font-size: 0.95rem;
            background: #fff;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.04);
        }
        .info-table th {
            background: #0d1b2a;
            color: #ffd60a;
            padding: 0.7rem 1rem;
            text-align: left;
            font-weight: 600;
        }
        .info-table td {
            padding: 0.6rem 1rem;
            border-bottom: 1px solid #f0f0f0;
        }
        .info-table tr:last-child td {
            border-bottom: none;
        }
        .info-table tr:hover td {
            background: #fffbe6;
        }