*,
        *::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: 1.7;
            color: #1e293b;
            background: #f8fafc;
            padding: 0;
            margin: 0;
        }
        a {
            text-decoration: none;
            color: #2563eb;
            transition: color 0.25s ease;
        }
        a:hover,
        a:focus {
            color: #1e40af;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        ul,
        ol {
            padding-left: 1.5rem;
            margin-bottom: 1rem;
        }
        li {
            margin-bottom: 0.35rem;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            color: #0f172a;
            margin-top: 0;
        }
        h1 {
            font-size: 2.4rem;
            margin-bottom: 0.75rem;
        }
        h2 {
            font-size: 1.9rem;
            margin-top: 2.5rem;
            margin-bottom: 0.6rem;
            border-bottom: 3px solid #f97316;
            padding-bottom: 0.3rem;
            display: inline-block;
        }
        h3 {
            font-size: 1.5rem;
            margin-top: 1.8rem;
            margin-bottom: 0.5rem;
            color: #1e293b;
        }
        h4 {
            font-size: 1.2rem;
            margin-top: 1.2rem;
            margin-bottom: 0.4rem;
            color: #334155;
        }
        p {
            margin-bottom: 1.1rem;
            font-size: 1.05rem;
        }
        strong,
        b {
            color: #0f172a;
            font-weight: 700;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.25rem;
        }
        .site-header {
            background: linear-gradient(135deg, #1e3a5f 0%, #0f2b45 100%);
            color: #fff;
            padding: 1rem 0;
            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: -0.5px;
            color: #f97316;
            background: rgba(255, 255, 255, 0.08);
            padding: 0.2rem 1rem;
            border-radius: 8px;
            border: 2px solid rgba(249, 115, 22, 0.4);
            transition: all 0.3s ease;
            display: inline-block;
        }
        .my-logo:hover {
            background: rgba(249, 115, 22, 0.2);
            border-color: #f97316;
            text-decoration: none;
            color: #fb923c;
        }
        .my-logo span {
            font-weight: 300;
            color: #cbd5e1;
            font-size: 0.8rem;
            letter-spacing: 1px;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            flex-wrap: wrap;
        }
        .main-nav a {
            color: #e2e8f0;
            font-weight: 500;
            font-size: 0.95rem;
            padding: 0.4rem 0.8rem;
            border-radius: 6px;
            transition: all 0.25s ease;
            position: relative;
        }
        .main-nav a:hover,
        .main-nav a.active {
            color: #fff;
            background: rgba(249, 115, 22, 0.25);
            text-decoration: none;
        }
        .main-nav a i {
            margin-right: 0.3rem;
            font-size: 0.85rem;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: #fff;
            font-size: 1.7rem;
            cursor: pointer;
            padding: 0.25rem 0.5rem;
            border-radius: 6px;
            transition: background 0.2s;
        }
        .hamburger:hover {
            background: rgba(255, 255, 255, 0.1);
        }
        .nav-overlay {
            display: none;
        }
        .breadcrumb {
            background: #f1f5f9;
            padding: 0.6rem 0;
            font-size: 0.9rem;
            border-bottom: 1px solid #e2e8f0;
        }
        .breadcrumb ul {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 0.4rem 0.8rem;
            padding: 0;
            margin: 0;
        }
        .breadcrumb ul li {
            margin: 0;
        }
        .breadcrumb ul li+li::before {
            content: "›";
            margin-right: 0.6rem;
            color: #94a3b8;
            font-weight: 700;
        }
        .breadcrumb a {
            color: #2563eb;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .breadcrumb .current {
            color: #475569;
            font-weight: 600;
        }
        .hero {
            background: linear-gradient(135deg, #0f2b45 0%, #1e4a6f 100%);
            color: #fff;
            padding: 3rem 0 2.5rem;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .hero::after {
            content: "🔤📖🎯";
            position: absolute;
            right: 5%;
            bottom: 10%;
            font-size: 5rem;
            opacity: 0.1;
            pointer-events: none;
        }
        .hero h1 {
            color: #fff;
            font-size: 2.8rem;
            max-width: 900px;
            margin: 0 auto 0.8rem;
            text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
        }
        .hero p {
            font-size: 1.2rem;
            max-width: 750px;
            margin: 0 auto 1.2rem;
            color: #cbd5e1;
        }
        .hero .meta {
            font-size: 0.95rem;
            color: #94a3b8;
            display: flex;
            justify-content: center;
            gap: 1.5rem;
            flex-wrap: wrap;
        }
        .hero .meta i {
            color: #f97316;
            margin-right: 0.3rem;
        }
        .main-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2.5rem;
            padding: 2.5rem 0;
        }
        .main-content {
            min-width: 0;
        }
        .sidebar {
            position: sticky;
            top: 100px;
            align-self: start;
        }
        .sidebar-card {
            background: #fff;
            border-radius: 12px;
            padding: 1.5rem;
            margin-bottom: 1.5rem;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
            border: 1px solid #e2e8f0;
        }
        .sidebar-card h3 {
            font-size: 1.2rem;
            margin-top: 0;
            margin-bottom: 0.8rem;
            border-bottom: 2px solid #f97316;
            padding-bottom: 0.3rem;
            display: inline-block;
        }
        .sidebar-card ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .sidebar-card ul li {
            padding: 0.4rem 0;
            border-bottom: 1px solid #f1f5f9;
        }
        .sidebar-card ul li:last-child {
            border-bottom: none;
        }
        .sidebar-card ul li a {
            color: #1e293b;
            font-weight: 500;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .sidebar-card ul li a:hover {
            color: #f97316;
            text-decoration: none;
        }
        .sidebar-card ul li a i {
            color: #f97316;
            font-size: 0.8rem;
        }
        .content-section {
            background: #fff;
            border-radius: 16px;
            padding: 2rem 2.2rem;
            margin-bottom: 2rem;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.05);
            border: 1px solid #eef2f6;
        }
        .content-section .featured-image {
            border-radius: 12px;
            margin: 1.5rem 0;
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.08);
            width: 100%;
        }
        .content-section .img-caption {
            font-size: 0.85rem;
            color: #64748b;
            text-align: center;
            margin-top: 0.3rem;
            font-style: italic;
        }
        .highlight-box {
            background: #fef9ee;
            border-left: 5px solid #f97316;
            padding: 1.2rem 1.5rem;
            border-radius: 0 10px 10px 0;
            margin: 1.5rem 0;
        }
        .highlight-box p:last-child {
            margin-bottom: 0;
        }
        .tip-box {
            background: #ecfdf5;
            border-left: 5px solid #10b981;
            padding: 1.2rem 1.5rem;
            border-radius: 0 10px 10px 0;
            margin: 1.5rem 0;
        }
        .tip-box p:last-child {
            margin-bottom: 0;
        }
        .stat-table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.5rem 0;
            font-size: 0.98rem;
        }
        .stat-table th {
            background: #1e3a5f;
            color: #fff;
            padding: 0.7rem 1rem;
            text-align: left;
            font-weight: 600;
        }
        .stat-table td {
            padding: 0.6rem 1rem;
            border-bottom: 1px solid #e2e8f0;
        }
        .stat-table tr:nth-child(even) {
            background: #f8fafc;
        }
        .stat-table tr:hover {
            background: #eef2f6;
        }
        .inline-link {
            color: #f97316;
            font-weight: 600;
            border-bottom: 1px dashed #f97316;
        }
        .inline-link:hover {
            color: #ea580c;
            border-bottom-style: solid;
            text-decoration: none;
        }
        .search-form {
            display: flex;
            gap: 0.6rem;
            margin: 1.5rem 0;
            max-width: 600px;
        }
        .search-form input[type="text"] {
            flex: 1;
            padding: 0.75rem 1.2rem;
            border: 2px solid #e2e8f0;
            border-radius: 30px;
            font-size: 1rem;
            outline: none;
            transition: border 0.3s;
            background: #f8fafc;
        }
        .search-form input[type="text"]:focus {
            border-color: #f97316;
            background: #fff;
        }
        .search-form button {
            background: #f97316;
            color: #fff;
            border: none;
            padding: 0.75rem 1.8rem;
            border-radius: 30px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.3s;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .search-form button:hover {
            background: #ea580c;
        }
        .interaction-area {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1.8rem;
            margin: 2rem 0;
        }
        .comment-form,
        .rating-form {
            background: #f8fafc;
            padding: 1.5rem 1.8rem;
            border-radius: 14px;
            border: 1px solid #e2e8f0;
        }
        .comment-form h3,
        .rating-form h3 {
            margin-top: 0;
            font-size: 1.2rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .comment-form textarea {
            width: 100%;
            padding: 0.8rem 1rem;
            border: 2px solid #e2e8f0;
            border-radius: 10px;
            font-size: 0.98rem;
            font-family: inherit;
            resize: vertical;
            min-height: 90px;
            transition: border 0.3s;
            background: #fff;
        }
        .comment-form textarea:focus {
            border-color: #f97316;
            outline: none;
        }
        .comment-form input[type="text"],
        .comment-form input[type="email"] {
            width: 100%;
            padding: 0.65rem 1rem;
            border: 2px solid #e2e8f0;
            border-radius: 8px;
            font-size: 0.98rem;
            margin-bottom: 0.7rem;
            transition: border 0.3s;
            background: #fff;
        }
        .comment-form input:focus {
            border-color: #f97316;
            outline: none;
        }
        .comment-form .btn-submit,
        .rating-form .btn-submit {
            background: #1e3a5f;
            color: #fff;
            border: none;
            padding: 0.65rem 1.8rem;
            border-radius: 30px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.3s;
            margin-top: 0.5rem;
        }
        .comment-form .btn-submit:hover,
        .rating-form .btn-submit:hover {
            background: #0f2b45;
        }
        .star-rating {
            display: flex;
            flex-direction: row-reverse;
            justify-content: flex-end;
            gap: 0.2rem;
            font-size: 2rem;
            margin: 0.5rem 0 0.8rem;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            color: #d1d5db;
            cursor: pointer;
            transition: color 0.2s;
        }
        .star-rating input:checked~label,
        .star-rating label:hover,
        .star-rating label:hover~label {
            color: #f97316;
        }
        .rating-form select {
            padding: 0.6rem 1rem;
            border: 2px solid #e2e8f0;
            border-radius: 8px;
            font-size: 0.98rem;
            background: #fff;
            width: 100%;
            margin-bottom: 0.7rem;
        }
        .site-footer {
            background: #0f2b45;
            color: #cbd5e1;
            padding: 2.5rem 0 1.5rem;
            margin-top: 3rem;
        }
        .footer-inner {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 2rem;
            margin-bottom: 1.5rem;
        }
        .site-footer h4 {
            color: #f97316;
            font-size: 1.1rem;
            margin-bottom: 0.8rem;
        }
        .site-footer a {
            color: #94a3b8;
        }
        .site-footer a:hover {
            color: #f97316;
            text-decoration: none;
        }
        .footer-bottom {
            border-top: 1px solid #1e3a5f;
            padding-top: 1.2rem;
            text-align: center;
            font-size: 0.9rem;
            color: #64748b;
        }
        .footer-bottom .copyright {
            font-weight: 600;
            color: #94a3b8;
        }
        friend-link {
            display: block;
            background: #1a314a;
            padding: 1rem 1.5rem;
            border-radius: 10px;
            margin: 1rem 0;
            font-size: 0.95rem;
        }
        friend-link a {
            color: #fb923c;
            margin: 0 0.5rem;
        }
        friend-link a:hover {
            color: #f97316;
            text-decoration: underline;
        }
        @media (max-width: 992px) {
            .main-grid {
                grid-template-columns: 1fr;
            }
            .sidebar {
                position: static;
                display: grid;
                grid-template-columns: 1fr 1fr;
                gap: 1rem;
            }
            .footer-inner {
                grid-template-columns: 1fr 1fr;
            }
            .hero h1 {
                font-size: 2.2rem;
            }
        }
        @media (max-width: 768px) {
            .header-inner {
                flex-wrap: wrap;
            }
            .main-nav {
                display: none;
                flex-direction: column;
                width: 100%;
                background: #0f2b45;
                padding: 1rem 0;
                border-radius: 0 0 12px 12px;
                margin-top: 0.8rem;
                gap: 0.2rem;
            }
            .main-nav.open {
                display: flex;
            }
            .main-nav a {
                padding: 0.6rem 1.2rem;
                border-radius: 0;
                border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            }
            .hamburger {
                display: block;
            }
            .nav-overlay {
                display: none;
            }
            .sidebar {
                grid-template-columns: 1fr;
            }
            .interaction-area {
                grid-template-columns: 1fr;
            }
            .hero h1 {
                font-size: 1.8rem;
            }
            .hero p {
                font-size: 1rem;
            }
            .content-section {
                padding: 1.2rem 1rem;
            }
            .footer-inner {
                grid-template-columns: 1fr;
                gap: 1.2rem;
            }
            .search-form {
                flex-direction: column;
            }
            .search-form button {
                justify-content: center;
            }
            h1 {
                font-size: 1.8rem;
            }
            h2 {
                font-size: 1.5rem;
            }
            h3 {
                font-size: 1.25rem;
            }
            .stat-table {
                font-size: 0.85rem;
            }
            .stat-table th,
            .stat-table td {
                padding: 0.4rem 0.5rem;
            }
            .my-logo {
                font-size: 1.4rem;
            }
        }
        @media (max-width: 480px) {
            .hero h1 {
                font-size: 1.5rem;
            }
            .container {
                padding: 0 0.9rem;
            }
            .content-section {
                padding: 1rem 0.8rem;
            }
            .highlight-box,
            .tip-box {
                padding: 0.9rem 1rem;
            }
            .my-logo span {
                display: none;
            }
        }
        .scroll-top {
            position: fixed;
            bottom: 25px;
            right: 25px;
            background: #f97316;
            color: #fff;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            box-shadow: 0 4px 15px rgba(249, 115, 22, 0.4);
            transition: all 0.3s;
            opacity: 0.8;
            z-index: 999;
            border: none;
            cursor: pointer;
        }
        .scroll-top:hover {
            opacity: 1;
            transform: translateY(-3px);
            background: #ea580c;
        }
        @media print {
            .site-header,
            .breadcrumb,
            .sidebar,
            .search-form,
            .interaction-area,
            .scroll-top,
            .hamburger {
                display: none !important;
            }
            .main-grid {
                display: block;
            }
            .content-section {
                box-shadow: none;
                border: 1px solid #ddd;
                break-inside: avoid;
            }
            body {
                background: #fff;
                font-size: 12pt;
            }
        }