* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background: #f5f7fa;
            color: #1e2a3a;
            line-height: 1.7;
            font-size: 16px;
        }
        a {
            color: #d62828;
            text-decoration: none;
            transition: color 0.25s ease;
        }
        a:hover,
        a:focus {
            color: #9b1b1b;
            text-decoration: underline;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: linear-gradient(135deg, #0b1a2e 0%, #1a3a5c 100%);
            padding: 16px 0;
            border-bottom: 4px solid #d62828;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.25);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 1.9rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: 1px;
            text-shadow: 2px 2px 0 #d62828;
            transition: transform 0.2s;
            font-family: 'Impact', 'Arial Black', sans-serif;
        }
        .my-logo:hover {
            transform: scale(1.03);
            text-decoration: none;
            color: #ffe66d;
        }
        .my-logo i {
            color: #ffe66d;
            margin-right: 6px;
        }
        .hamburger {
            display: none;
            background: none;
            border: 2px solid #fff;
            color: #fff;
            font-size: 1.5rem;
            padding: 6px 14px;
            border-radius: 6px;
            cursor: pointer;
            transition: background 0.2s;
        }
        .hamburger:hover {
            background: rgba(255, 255, 255, 0.12);
        }
        .nav-menu {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }
        .nav-menu a {
            color: #eaeef2;
            font-weight: 600;
            padding: 8px 16px;
            border-radius: 30px;
            background: rgba(255, 255, 255, 0.06);
            transition: background 0.25s, color 0.25s;
            font-size: 0.92rem;
        }
        .nav-menu a:hover {
            background: #d62828;
            color: #fff;
            text-decoration: none;
        }
        .nav-menu a i {
            margin-right: 6px;
        }
        .breadcrumb {
            background: #e9edf2;
            padding: 12px 0;
            border-bottom: 1px solid #d0d7de;
        }
        .breadcrumb ul {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 6px 14px;
            font-size: 0.88rem;
        }
        .breadcrumb ul li+li::before {
            content: "›";
            margin-right: 14px;
            color: #8a9aa8;
            font-weight: 700;
        }
        .breadcrumb a {
            color: #1e2a3a;
        }
        .breadcrumb a:hover {
            color: #d62828;
        }
        .breadcrumb .current {
            color: #6c7a8a;
            font-weight: 600;
        }
        main {
            padding: 40px 0 60px;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
        }
        @media (max-width: 992px) {
            .content-grid {
                grid-template-columns: 1fr;
            }
        }
        .article-body h1 {
            font-size: 2.5rem;
            color: #0b1a2e;
            margin-bottom: 10px;
            line-height: 1.2;
            border-left: 6px solid #d62828;
            padding-left: 20px;
        }
        .article-body h1 i {
            color: #d62828;
        }
        .article-body .last-updated {
            display: block;
            font-size: 0.92rem;
            color: #6c7a8a;
            margin-bottom: 30px;
            font-weight: 500;
        }
        .article-body .last-updated i {
            margin-right: 6px;
        }
        .article-body h2 {
            font-size: 1.8rem;
            color: #0b1a2e;
            margin: 48px 0 16px;
            border-bottom: 3px solid #d62828;
            padding-bottom: 8px;
        }
        .article-body h2 i {
            color: #d62828;
            margin-right: 10px;
        }
        .article-body h3 {
            font-size: 1.35rem;
            color: #1a3a5c;
            margin: 32px 0 12px;
        }
        .article-body h4 {
            font-size: 1.1rem;
            color: #2d4a6e;
            margin: 22px 0 8px;
            font-weight: 700;
        }
        .article-body p {
            margin-bottom: 18px;
            text-align: justify;
        }
        .article-body ul,
        .article-body ol {
            margin: 14px 0 22px 28px;
        }
        .article-body li {
            margin-bottom: 10px;
        }
        .article-body strong {
            color: #0b1a2e;
        }
        .article-body .feature-img {
            margin: 30px 0 20px;
            border-radius: 14px;
            max-width: 100%;
            height: auto;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
            display: block;
            width: 100%;
            border: 2px solid #e2e8f0;
        }
        .sidebar {
            background: #ffffff;
            border-radius: 16px;
            padding: 28px 22px;
            box-shadow: 0 6px 24px rgba(0, 0, 0, 0.06);
            border: 1px solid #e2e8f0;
            height: fit-content;
            position: sticky;
            top: 100px;
        }
        .sidebar h3 {
            font-size: 1.25rem;
            color: #0b1a2e;
            border-bottom: 2px solid #d62828;
            padding-bottom: 8px;
            margin-bottom: 18px;
        }
        .sidebar ul {
            list-style: none;
        }
        .sidebar ul li {
            margin-bottom: 12px;
        }
        .sidebar ul li a {
            font-weight: 500;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sidebar ul li a i {
            color: #d62828;
            width: 18px;
        }
        .search-section {
            background: #eef2f6;
            border-radius: 14px;
            padding: 28px 24px;
            margin: 40px 0;
            border: 1px solid #d0d7de;
        }
        .search-section h3 {
            font-size: 1.3rem;
            margin-bottom: 14px;
            color: #0b1a2e;
        }
        .search-form {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }
        .search-form input {
            flex: 1;
            min-width: 200px;
            padding: 12px 18px;
            border: 2px solid #ccd4dd;
            border-radius: 30px;
            font-size: 1rem;
            outline: none;
            transition: border 0.25s;
        }
        .search-form input:focus {
            border-color: #d62828;
        }
        .search-form button {
            padding: 12px 32px;
            background: #d62828;
            color: #fff;
            border: none;
            border-radius: 30px;
            font-weight: 700;
            font-size: 1rem;
            cursor: pointer;
            transition: background 0.25s, transform 0.15s;
        }
        .search-form button:hover {
            background: #9b1b1b;
            transform: scale(1.02);
        }
        .interact-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 30px;
            margin: 44px 0;
        }
        @media (max-width: 700px) {
            .interact-grid {
                grid-template-columns: 1fr;
            }
        }
        .comment-box,
        .rating-box {
            background: #ffffff;
            border-radius: 14px;
            padding: 26px 22px;
            border: 1px solid #e2e8f0;
            box-shadow: 0 4px 14px rgba(0, 0, 0, 0.04);
        }
        .comment-box h3,
        .rating-box h3 {
            font-size: 1.2rem;
            color: #0b1a2e;
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .comment-box textarea {
            width: 100%;
            padding: 12px 14px;
            border: 2px solid #ccd4dd;
            border-radius: 10px;
            font-size: 0.95rem;
            resize: vertical;
            min-height: 100px;
            font-family: inherit;
            transition: border 0.25s;
        }
        .comment-box textarea:focus {
            border-color: #d62828;
            outline: none;
        }
        .comment-box input,
        .rating-box input {
            width: 100%;
            padding: 10px 14px;
            border: 2px solid #ccd4dd;
            border-radius: 8px;
            font-size: 0.95rem;
            margin-top: 10px;
            transition: border 0.25s;
        }
        .comment-box input:focus,
        .rating-box input:focus {
            border-color: #d62828;
            outline: none;
        }
        .comment-box button,
        .rating-box button {
            margin-top: 14px;
            padding: 10px 28px;
            background: #0b1a2e;
            color: #fff;
            border: none;
            border-radius: 30px;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.25s, transform 0.15s;
        }
        .comment-box button:hover,
        .rating-box button:hover {
            background: #1a3a5c;
            transform: scale(1.02);
        }
        .rating-stars {
            display: flex;
            gap: 8px;
            font-size: 1.8rem;
            color: #f0c929;
            margin: 12px 0 6px;
            cursor: pointer;
        }
        .rating-stars i {
            transition: transform 0.15s, color 0.15s;
        }
        .rating-stars i:hover {
            transform: scale(1.25);
            color: #f59e0b;
        }
        .site-footer {
            background: #0b1a2e;
            color: #cbd5e1;
            padding: 40px 0 20px;
            border-top: 4px solid #d62828;
            margin-top: 40px;
        }
        .footer-inner {
            display: grid;
            grid-template-columns: 2fr 1fr;
            gap: 40px;
        }
        @media (max-width: 700px) {
            .footer-inner {
                grid-template-columns: 1fr;
            }
        }
        .footer-inner h4 {
            color: #fff;
            font-size: 1.1rem;
            margin-bottom: 14px;
            border-bottom: 2px solid #d62828;
            padding-bottom: 6px;
            display: inline-block;
        }
        .footer-inner p {
            font-size: 0.92rem;
            line-height: 1.7;
        }
        friend-link {
            display: block;
            margin-top: 10px;
        }
        friend-link a {
            color: #f0c929;
            font-weight: 500;
            margin-right: 18px;
            display: inline-block;
            padding: 4px 0;
        }
        friend-link a:hover {
            color: #ffe66d;
            text-decoration: underline;
        }
        .copyright {
            text-align: center;
            padding-top: 24px;
            margin-top: 24px;
            border-top: 1px solid #1e3a5c;
            font-size: 0.85rem;
            color: #8a9aa8;
        }
        .copyright a {
            color: #f0c929;
        }
        @media (max-width: 768px) {
            .hamburger {
                display: inline-block;
            }
            .nav-menu {
                display: none;
                width: 100%;
                flex-direction: column;
                margin-top: 16px;
                gap: 8px;
            }
            .nav-menu.open {
                display: flex;
            }
            .nav-menu a {
                background: rgba(255, 255, 255, 0.08);
                border-radius: 8px;
                padding: 10px 18px;
            }
            .article-body h1 {
                font-size: 1.8rem;
                padding-left: 14px;
            }
            .article-body h2 {
                font-size: 1.4rem;
            }
            .article-body h3 {
                font-size: 1.15rem;
            }
            .sidebar {
                position: static;
                margin-top: 30px;
            }
            .search-form {
                flex-direction: column;
            }
            .search-form button {
                width: 100%;
            }
            .interact-grid {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 480px) {
            .header-inner {
                flex-wrap: nowrap;
            }
            .my-logo {
                font-size: 1.3rem;
            }
            .my-logo i {
                font-size: 1.1rem;
            }
            .breadcrumb ul {
                font-size: 0.78rem;
                gap: 4px 10px;
            }
            .article-body h1 {
                font-size: 1.5rem;
            }
            .container {
                padding: 0 14px;
            }
        }
        .tag {
            display: inline-block;
            background: #d62828;
            color: #fff;
            padding: 2px 14px;
            border-radius: 30px;
            font-size: 0.75rem;
            font-weight: 700;
            letter-spacing: 0.5px;
            text-transform: uppercase;
        }
        .highlight-box {
            background: #fef9e7;
            border-left: 6px solid #f0c929;
            padding: 18px 22px;
            border-radius: 0 12px 12px 0;
            margin: 24px 0;
        }
        .highlight-box strong {
            color: #9b1b1b;
        }
        .emoji-big {
            font-size: 1.4rem;
        }
        hr.divider {
            margin: 40px 0;
            border: 0;
            height: 2px;
            background: linear-gradient(to right, transparent, #d62828, transparent);
        }