*,
        *::before,
        *::after {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.8;
            background: #f5f7fa;
            color: #1a2a3a;
            padding: 0;
            margin: 0;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: #0077b6;
            text-decoration: none;
            transition: color 0.2s ease;
        }
        a:hover {
            color: #023e8a;
            text-decoration: underline;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: linear-gradient(135deg, #0b2a3b, #1b4a5f);
            color: #fff;
            padding: 16px 0;
            border-bottom: 4px solid #f9c74f;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 1.9rem;
            font-weight: 800;
            letter-spacing: 1px;
            color: #f9c74f;
            text-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
            transition: transform 0.2s;
        }
        .my-logo:hover {
            transform: scale(1.03);
            text-decoration: none;
            color: #ffd966;
        }
        .my-logo span {
            color: #fff;
            font-weight: 300;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            color: #fff;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 4px 12px;
            border-radius: 6px;
            transition: background 0.2s;
        }
        .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: #e0f0f8;
            padding: 8px 16px;
            border-radius: 30px;
            font-weight: 500;
            font-size: 0.95rem;
            transition: all 0.25s ease;
            white-space: nowrap;
        }
        .main-nav a:hover {
            background: rgba(249, 199, 79, 0.2);
            color: #f9c74f;
            text-decoration: none;
        }
        .main-nav a.active {
            background: #f9c74f;
            color: #0b2a3b;
        }
        .breadcrumb {
            background: #e9ecef;
            padding: 10px 0;
            font-size: 0.9rem;
            border-bottom: 1px solid #dce3e8;
        }
        .breadcrumb ol {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 6px 12px;
        }
        .breadcrumb li+li::before {
            content: "›";
            margin-right: 10px;
            color: #6c7a85;
            font-weight: 600;
        }
        .breadcrumb a {
            color: #0077b6;
        }
        .breadcrumb .current {
            color: #2a3a4a;
            font-weight: 600;
        }
        .main-content {
            padding: 40px 0 60px;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 40px;
        }
        .article-body h1 {
            font-size: 2.6rem;
            line-height: 1.2;
            color: #0b2a3b;
            margin-bottom: 16px;
            font-weight: 800;
        }
        .article-body h2 {
            font-size: 1.9rem;
            margin-top: 48px;
            margin-bottom: 16px;
            color: #0b2a3b;
            border-left: 6px solid #f9c74f;
            padding-left: 18px;
            font-weight: 700;
        }
        .article-body h3 {
            font-size: 1.4rem;
            margin-top: 32px;
            margin-bottom: 12px;
            color: #1b4a5f;
            font-weight: 600;
        }
        .article-body h4 {
            font-size: 1.15rem;
            margin-top: 24px;
            margin-bottom: 8px;
            color: #2a5a6f;
            font-weight: 600;
        }
        .article-body p {
            margin-bottom: 20px;
            font-size: 1.05rem;
            color: #1f2e3a;
        }
        .article-body ul,
        .article-body ol {
            margin: 16px 0 24px 24px;
        }
        .article-body li {
            margin-bottom: 10px;
            font-size: 1.05rem;
        }
        .article-body strong {
            color: #0b2a3b;
            font-weight: 700;
        }
        .article-body .highlight-box {
            background: #edf6fc;
            border-left: 6px solid #0077b6;
            padding: 20px 24px;
            border-radius: 0 12px 12px 0;
            margin: 28px 0;
        }
        .article-body .highlight-box p:last-child {
            margin-bottom: 0;
        }
        .article-image {
            margin: 32px 0;
            border-radius: 16px;
            overflow: hidden;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
        }
        .article-image img {
            width: 100%;
            object-fit: cover;
        }
        .article-image figcaption {
            background: #f0f4f8;
            padding: 12px 20px;
            font-size: 0.9rem;
            color: #3a4a5a;
            font-style: italic;
        }
        .last-updated {
            display: inline-block;
            background: #e9ecef;
            padding: 6px 18px;
            border-radius: 30px;
            font-size: 0.85rem;
            color: #4a5a6a;
            margin-bottom: 20px;
        }
        .sidebar {
            position: sticky;
            top: 120px;
            align-self: start;
        }
        .sidebar-card {
            background: #fff;
            border-radius: 16px;
            padding: 24px 20px;
            margin-bottom: 24px;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
            border: 1px solid #e8edf2;
        }
        .sidebar-card h3 {
            font-size: 1.2rem;
            margin-bottom: 16px;
            color: #0b2a3b;
            border-bottom: 2px solid #f9c74f;
            padding-bottom: 10px;
        }
        .sidebar-card ul {
            list-style: none;
            padding: 0;
        }
        .sidebar-card ul li {
            padding: 8px 0;
            border-bottom: 1px solid #f0f2f4;
        }
        .sidebar-card ul li a {
            font-weight: 500;
        }
        .search-form {
            display: flex;
            gap: 8px;
            margin-top: 12px;
        }
        .search-form input {
            flex: 1;
            padding: 12px 16px;
            border: 2px solid #dce3e8;
            border-radius: 30px;
            font-size: 1rem;
            outline: none;
            transition: border 0.2s;
        }
        .search-form input:focus {
            border-color: #f9c74f;
        }
        .search-form button {
            background: #f9c74f;
            border: none;
            border-radius: 30px;
            padding: 0 20px;
            font-size: 1rem;
            font-weight: 600;
            color: #0b2a3b;
            cursor: pointer;
            transition: background 0.2s, transform 0.1s;
        }
        .search-form button:hover {
            background: #f0b832;
            transform: scale(1.02);
        }
        .search-form button i {
            margin-right: 6px;
        }
        .comment-box,
        .rating-box {
            background: #fff;
            border-radius: 16px;
            padding: 28px 24px;
            margin: 40px 0;
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.05);
            border: 1px solid #e8edf2;
        }
        .comment-box h3,
        .rating-box h3 {
            font-size: 1.5rem;
            color: #0b2a3b;
            margin-bottom: 16px;
        }
        .comment-form textarea {
            width: 100%;
            padding: 14px 18px;
            border: 2px solid #dce3e8;
            border-radius: 12px;
            font-size: 1rem;
            resize: vertical;
            min-height: 120px;
            outline: none;
            transition: border 0.2s;
            font-family: inherit;
        }
        .comment-form textarea:focus {
            border-color: #f9c74f;
        }
        .comment-form .form-row {
            display: flex;
            gap: 16px;
            margin-top: 12px;
            flex-wrap: wrap;
        }
        .comment-form .form-row input {
            flex: 1;
            padding: 12px 16px;
            border: 2px solid #dce3e8;
            border-radius: 30px;
            font-size: 1rem;
            outline: none;
            transition: border 0.2s;
            min-width: 180px;
        }
        .comment-form .form-row input:focus {
            border-color: #f9c74f;
        }
        .comment-form button {
            background: #0077b6;
            color: #fff;
            border: none;
            padding: 12px 32px;
            border-radius: 30px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.2s, transform 0.1s;
        }
        .comment-form button:hover {
            background: #005a8a;
            transform: scale(1.02);
        }
        .comment-form button i {
            margin-right: 8px;
        }
        .star-rating {
            display: flex;
            gap: 6px;
            font-size: 2rem;
            color: #dce3e8;
            cursor: pointer;
            margin: 12px 0 20px;
            direction: rtl;
            justify-content: flex-end;
        }
        .star-rating i {
            transition: color 0.15s, transform 0.15s;
        }
        .star-rating i:hover,
        .star-rating i:hover~i {
            color: #f9c74f;
            transform: scale(1.1);
        }
        .star-rating.selected i.active {
            color: #f9c74f;
        }
        .rating-submit {
            background: #f9c74f;
            border: none;
            padding: 12px 32px;
            border-radius: 30px;
            font-size: 1rem;
            font-weight: 600;
            color: #0b2a3b;
            cursor: pointer;
            transition: background 0.2s, transform 0.1s;
        }
        .rating-submit:hover {
            background: #f0b832;
            transform: scale(1.02);
        }
        .rating-submit i {
            margin-right: 8px;
        }
        .site-footer {
            background: #0b2a3b;
            color: #d0e0e8;
            padding: 40px 0 30px;
            border-top: 4px solid #f9c74f;
        }
        .footer-inner {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 30px;
        }
        .footer-inner h4 {
            color: #f9c74f;
            font-size: 1.1rem;
            margin-bottom: 16px;
            font-weight: 600;
        }
        .footer-inner p,
        .footer-inner li {
            font-size: 0.95rem;
            line-height: 1.7;
        }
        .footer-inner ul {
            list-style: none;
            padding: 0;
        }
        .footer-inner ul li {
            padding: 4px 0;
        }
        .footer-inner ul li a {
            color: #b0c8d8;
        }
        .footer-inner ul li a:hover {
            color: #f9c74f;
        }
        friend-link {
            display: block;
            padding: 18px 0;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            margin-top: 10px;
            font-size: 0.95rem;
        }
        friend-link a {
            color: #b0c8d8;
            margin: 0 6px;
        }
        friend-link a:hover {
            color: #f9c74f;
        }
        .copyright {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            font-size: 0.9rem;
            color: #8aa0b0;
        }
        @media (max-width: 992px) {
            .content-grid {
                grid-template-columns: 1fr;
            }
            .sidebar {
                position: static;
            }
            .footer-inner {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 768px) {
            .nav-toggle {
                display: block;
            }
            .main-nav {
                display: none;
                flex-direction: column;
                width: 100%;
                background: rgba(11, 42, 59, 0.98);
                padding: 16px 0 20px;
                border-radius: 0 0 16px 16px;
                margin-top: 12px;
                gap: 4px;
            }
            .main-nav.open {
                display: flex;
            }
            .main-nav a {
                padding: 12px 20px;
                border-radius: 0;
                border-bottom: 1px solid rgba(255, 255, 255, 0.05);
                width: 100%;
                text-align: center;
            }
            .main-nav a.active {
                background: #f9c74f;
                color: #0b2a3b;
                border-radius: 30px;
                margin: 4px 16px;
                width: auto;
            }
            .article-body h1 {
                font-size: 1.8rem;
            }
            .article-body h2 {
                font-size: 1.4rem;
                padding-left: 12px;
            }
            .article-body h3 {
                font-size: 1.2rem;
            }
            .header-inner {
                align-items: center;
            }
            .my-logo {
                font-size: 1.4rem;
            }
            .footer-inner {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .comment-form .form-row {
                flex-direction: column;
            }
            .comment-form .form-row input {
                min-width: auto;
            }
            .star-rating {
                font-size: 1.6rem;
                justify-content: center;
            }
            .breadcrumb ol {
                font-size: 0.8rem;
                gap: 4px 8px;
            }
        }
        @media (max-width: 480px) {
            .container {
                padding: 0 14px;
            }
            .article-body h1 {
                font-size: 1.5rem;
            }
            .article-body p {
                font-size: 0.98rem;
            }
            .search-form {
                flex-direction: column;
            }
            .search-form button {
                padding: 12px;
            }
        }
        .text-muted {
            color: #5a6a7a;
            font-size: 0.9rem;
        }
        .mt-2 {
            margin-top: 16px;
        }
        .mb-2 {
            margin-bottom: 16px;
        }
        .gap-1 {
            gap: 8px;
        }
        .flex {
            display: flex;
        }
        .flex-wrap {
            flex-wrap: wrap;
        }
        .items-center {
            align-items: center;
        }
        .anchor-offset {
            scroll-margin-top: 100px;
        }