*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: 'Segoe UI', Roboto, -apple-system, BlinkMacSystemFont, 'Helvetica Neue', Arial, sans-serif;
            line-height: 1.8;
            color: #1a1a2e;
            background: #f4f7fc;
            padding: 0;
            margin: 0;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: #0056b3;
            text-decoration: none;
            transition: color 0.2s;
        }
        a:hover {
            color: #ff6b35;
            text-decoration: underline;
        }
        ul,
        ol {
            padding-left: 1.5rem;
            margin: 1rem 0;
        }
        li {
            margin-bottom: 0.5rem;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.25rem;
        }
        .site-header {
            background: linear-gradient(145deg, #0f1a2e 0%, #1b2a4a 100%);
            color: #fff;
            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: 2rem;
            font-weight: 900;
            letter-spacing: -0.03em;
            background: linear-gradient(135deg, #f7971e, #ffd200);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            text-shadow: none;
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            transition: transform 0.2s;
        }
        .my-logo:hover {
            transform: scale(1.02);
        }
        .my-logo i {
            -webkit-text-fill-color: #ffd200;
            font-size: 1.8rem;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: 2px solid rgba(255, 255, 255, 0.3);
            color: #fff;
            font-size: 1.6rem;
            padding: 0.4rem 0.8rem;
            border-radius: 8px;
            cursor: pointer;
            transition: background 0.2s;
        }
        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.1);
        }
        .primary-nav {
            display: flex;
            align-items: center;
            gap: 0.25rem;
            flex-wrap: wrap;
        }
        .primary-nav a {
            color: #e0e8f0;
            padding: 0.5rem 1rem;
            border-radius: 6px;
            font-size: 0.9rem;
            font-weight: 500;
            transition: background 0.2s, color 0.2s;
            white-space: nowrap;
        }
        .primary-nav a:hover {
            background: rgba(255, 255, 255, 0.12);
            color: #ffd200;
            text-decoration: none;
        }
        .primary-nav a.active {
            background: rgba(255, 215, 0, 0.18);
            color: #ffd200;
        }
        .breadcrumb {
            background: #e9edf4;
            padding: 0.7rem 0;
            font-size: 0.85rem;
            border-bottom: 1px solid #d0d8e4;
        }
        .breadcrumb ol {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            padding: 0;
            margin: 0;
            gap: 0.3rem;
        }
        .breadcrumb li+li::before {
            content: "›";
            margin: 0 0.4rem;
            color: #888;
        }
        .breadcrumb a {
            color: #2c3e50;
        }
        .breadcrumb strong {
            color: #1a1a2e;
        }
        .hero {
            background: linear-gradient(135deg, #0b1628, #1f3a5f);
            color: #fff;
            padding: 3rem 0 2.5rem;
            text-align: center;
            border-bottom: 4px solid #ffd200;
        }
        .hero h1 {
            font-size: 2.8rem;
            font-weight: 900;
            letter-spacing: -0.02em;
            line-height: 1.2;
            margin-bottom: 0.75rem;
        }
        .hero h1 i {
            color: #ffd200;
            margin-right: 0.3rem;
        }
        .hero p {
            font-size: 1.2rem;
            max-width: 780px;
            margin: 0.5rem auto 0;
            opacity: 0.88;
        }
        .hero .last-updated {
            display: inline-block;
            margin-top: 1rem;
            background: rgba(255, 215, 0, 0.18);
            padding: 0.35rem 1.2rem;
            border-radius: 30px;
            font-size: 0.85rem;
            color: #ffd200;
            border: 1px solid rgba(255, 215, 0, 0.25);
        }
        .main-content {
            padding: 2.5rem 0 3rem;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 2.5rem;
        }
        @media(max-width:992px) {
            .content-grid {
                grid-template-columns: 1fr;
            }
        }
        .article-body h2 {
            font-size: 1.9rem;
            font-weight: 800;
            margin: 2.2rem 0 1rem;
            padding-bottom: 0.4rem;
            border-bottom: 3px solid #ffd200;
            color: #0f1a2e;
        }
        .article-body h2 i {
            color: #f7971e;
            margin-right: 0.5rem;
        }
        .article-body h3 {
            font-size: 1.45rem;
            font-weight: 700;
            margin: 1.8rem 0 0.8rem;
            color: #1b2a4a;
        }
        .article-body h3 i {
            color: #f7971e;
            margin-right: 0.4rem;
            font-size: 1.2rem;
        }
        .article-body h4 {
            font-size: 1.15rem;
            font-weight: 600;
            margin: 1.3rem 0 0.5rem;
            color: #2c3e50;
        }
        .article-body p {
            margin-bottom: 1.1rem;
            text-align: justify;
        }
        .article-body .feature-box {
            background: #fff;
            border-left: 4px solid #f7971e;
            padding: 1.2rem 1.5rem;
            border-radius: 0 12px 12px 0;
            margin: 1.5rem 0;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.05);
        }
        .article-body .feature-box h4 {
            margin-top: 0;
        }
        .article-body .highlight {
            background: #fff8e1;
            padding: 0.15rem 0.5rem;
            border-radius: 4px;
            font-weight: 600;
        }
        .content-image {
            margin: 2rem 0;
            border-radius: 16px;
            overflow: hidden;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
            background: #dfe6ed;
        }
        .content-image img {
            width: 100%;
            min-height: 240px;
            object-fit: cover;
            background: linear-gradient(135deg, #1b2a4a, #2c3e50);
        }
        .content-image figcaption {
            padding: 0.75rem 1.2rem;
            font-size: 0.85rem;
            color: #555;
            background: #fff;
            border-top: 1px solid #e0e0e0;
        }
        .sidebar {
            background: #fff;
            border-radius: 16px;
            padding: 1.5rem 1.8rem;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
            position: sticky;
            top: 105px;
            align-self: start;
        }
        .sidebar h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 1rem;
            color: #0f1a2e;
            border-bottom: 2px solid #ffd200;
            padding-bottom: 0.5rem;
        }
        .sidebar ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .sidebar li {
            padding: 0.4rem 0;
            border-bottom: 1px solid #f0f0f0;
        }
        .sidebar li a {
            color: #2c3e50;
            font-weight: 500;
        }
        .sidebar li a:hover {
            color: #f7971e;
        }
        .interactive-section {
            background: #fff;
            border-radius: 16px;
            padding: 2rem 2.2rem;
            margin: 2.5rem 0;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
        }
        .interactive-section h3 {
            font-size: 1.5rem;
            font-weight: 700;
            margin-bottom: 1.2rem;
            color: #0f1a2e;
        }
        .search-form {
            display: flex;
            gap: 0.75rem;
            flex-wrap: wrap;
            margin-bottom: 1rem;
        }
        .search-form input {
            flex: 1;
            min-width: 200px;
            padding: 0.75rem 1.2rem;
            border: 2px solid #d0d8e4;
            border-radius: 10px;
            font-size: 1rem;
            transition: border 0.2s;
            outline: none;
        }
        .search-form input:focus {
            border-color: #f7971e;
        }
        .search-form button {
            padding: 0.75rem 2rem;
            background: #f7971e;
            color: #fff;
            border: none;
            border-radius: 10px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.2s, transform 0.1s;
        }
        .search-form button:hover {
            background: #e0860a;
            transform: scale(1.02);
        }
        .comment-form textarea {
            width: 100%;
            min-height: 120px;
            padding: 0.9rem 1.2rem;
            border: 2px solid #d0d8e4;
            border-radius: 10px;
            font-size: 1rem;
            font-family: inherit;
            resize: vertical;
            transition: border 0.2s;
            outline: none;
        }
        .comment-form textarea:focus {
            border-color: #f7971e;
        }
        .comment-form .form-row {
            display: flex;
            gap: 1rem;
            flex-wrap: wrap;
            margin: 0.8rem 0;
        }
        .comment-form .form-row input {
            flex: 1;
            min-width: 180px;
            padding: 0.7rem 1.2rem;
            border: 2px solid #d0d8e4;
            border-radius: 10px;
            font-size: 1rem;
            outline: none;
            transition: border 0.2s;
        }
        .comment-form .form-row input:focus {
            border-color: #f7971e;
        }
        .comment-form button {
            padding: 0.7rem 2.2rem;
            background: #1b2a4a;
            color: #fff;
            border: none;
            border-radius: 10px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.2s, transform 0.1s;
        }
        .comment-form button:hover {
            background: #0f1a2e;
            transform: scale(1.02);
        }
        .rating-stars {
            display: flex;
            gap: 0.3rem;
            font-size: 2rem;
            color: #ffc107;
            cursor: pointer;
            margin: 0.5rem 0 1rem;
        }
        .rating-stars i {
            transition: transform 0.15s, color 0.2s;
        }
        .rating-stars i:hover {
            transform: scale(1.25);
            color: #ff9800;
        }
        .rating-stars i.active {
            color: #ff9800;
        }
        .rating-display {
            font-weight: 600;
            color: #2c3e50;
            margin-left: 0.5rem;
        }
        .site-footer {
            background: #0f1a2e;
            color: #c8d6e5;
            padding: 2.5rem 0 1.5rem;
            margin-top: 2rem;
            border-top: 4px solid #ffd200;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr;
            gap: 2rem;
            margin-bottom: 2rem;
        }
        @media(max-width:640px) {
            .footer-grid {
                grid-template-columns: 1fr;
            }
        }
        .site-footer h4 {
            color: #ffd200;
            font-size: 1.1rem;
            margin-bottom: 0.8rem;
        }
        .site-footer a {
            color: #b0c4de;
        }
        .site-footer a:hover {
            color: #ffd200;
        }
        friend-link {
            display: block;
            padding: 0.5rem 0;
        }
        friend-link a {
            display: inline-block;
            padding: 0.25rem 0.6rem;
            margin: 0.2rem 0;
            background: rgba(255, 255, 255, 0.06);
            border-radius: 6px;
            font-size: 0.9rem;
        }
        friend-link a:hover {
            background: rgba(255, 215, 0, 0.15);
        }
        .copyright {
            border-top: 1px solid #2a3a5a;
            padding-top: 1.2rem;
            text-align: center;
            font-size: 0.85rem;
            color: #8a9bb5;
        }
        @media(max-width:768px) {
            .nav-toggle {
                display: block;
            }
            .primary-nav {
                display: none;
                width: 100%;
                flex-direction: column;
                background: #1b2a4a;
                padding: 1rem 0.5rem;
                border-radius: 12px;
                margin-top: 0.5rem;
            }
            .primary-nav.open {
                display: flex;
            }
            .primary-nav a {
                padding: 0.6rem 1rem;
                width: 100%;
                border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            }
            .hero h1 {
                font-size: 1.9rem;
            }
            .hero p {
                font-size: 1rem;
            }
            .article-body h2 {
                font-size: 1.5rem;
            }
            .article-body h3 {
                font-size: 1.2rem;
            }
            .sidebar {
                position: static;
                margin-top: 1.5rem;
            }
            .interactive-section {
                padding: 1.2rem 1.2rem;
            }
            .rating-stars {
                font-size: 1.6rem;
            }
        }
        @media(max-width:480px) {
            .header-inner {
                flex-direction: row;
                flex-wrap: wrap;
            }
            .my-logo {
                font-size: 1.5rem;
            }
            .hero h1 {
                font-size: 1.5rem;
            }
            .container {
                padding: 0 0.9rem;
            }
            .search-form input,
            .search-form button {
                width: 100%;
            }
        }
        @media print {
            .site-header,
            .site-footer,
            .sidebar,
            .nav-toggle,
            .interactive-section {
                display: none !important;
            }
            .content-grid {
                display: block;
            }
            body {
                background: #fff;
                color: #000;
            }
        }