*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            background: #f8f9fc;
            color: #1e1e2a;
            line-height: 1.7;
            padding: 0;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: #2b4f8c;
            text-decoration: none;
            transition: color 0.2s;
        }
        a:hover {
            color: #1a355e;
            text-decoration: underline;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        h1 {
            font-size: 2.6rem;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 0.5rem;
            color: #0d1b33;
            letter-spacing: -0.02em;
        }
        h2 {
            font-size: 2rem;
            font-weight: 700;
            margin-top: 3rem;
            margin-bottom: 1rem;
            color: #0d1b33;
            border-bottom: 3px solid #e2e8f0;
            padding-bottom: 0.4rem;
        }
        h3 {
            font-size: 1.5rem;
            font-weight: 600;
            margin-top: 2rem;
            margin-bottom: 0.75rem;
            color: #1a2e4a;
        }
        h4 {
            font-size: 1.2rem;
            font-weight: 600;
            margin-top: 1.5rem;
            margin-bottom: 0.5rem;
            color: #2a4060;
        }
        p {
            margin-bottom: 1.2rem;
        }
        .lead {
            font-size: 1.2rem;
            color: #3a4a62;
            font-weight: 400;
        }
        .text-muted {
            color: #5a6a7a;
            font-size: 0.9rem;
        }
        .site-header {
            background: #ffffff;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
            position: sticky;
            top: 0;
            z-index: 100;
            padding: 0 0;
            border-bottom: 1px solid #e9edf2;
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0.8rem 0;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            color: #0d1b33;
            text-decoration: none;
            letter-spacing: -0.03em;
            display: flex;
            align-items: center;
            gap: 0.3rem;
        }
        .my-logo i {
            color: #2b4f8c;
            font-size: 1.6rem;
        }
        .my-logo:hover {
            color: #0d1b33;
            text-decoration: none;
        }
        .my-logo span {
            background: linear-gradient(135deg, #1a355e, #2b4f8c);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .nav-toggle {
            display: none;
            font-size: 1.6rem;
            background: none;
            border: none;
            color: #0d1b33;
            cursor: pointer;
            padding: 0.3rem 0.5rem;
            border-radius: 6px;
            transition: background 0.2s;
        }
        .nav-toggle:hover {
            background: #f0f2f5;
        }
        .nav-menu {
            display: flex;
            align-items: center;
            gap: 1.8rem;
            list-style: none;
        }
        .nav-menu li a {
            font-weight: 500;
            color: #1e2e4a;
            font-size: 0.95rem;
            padding: 0.3rem 0;
            border-bottom: 2px solid transparent;
            transition: border-color 0.2s, color 0.2s;
        }
        .nav-menu li a:hover {
            color: #2b4f8c;
            border-bottom-color: #2b4f8c;
            text-decoration: none;
        }
        .nav-menu li a i {
            margin-right: 0.3rem;
            font-size: 0.85rem;
        }
        .breadcrumb {
            background: #f0f3f8;
            padding: 0.6rem 0;
            font-size: 0.85rem;
            border-bottom: 1px solid #e2e8f0;
        }
        .breadcrumb ol {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 0.4rem 0.6rem;
            padding: 0;
        }
        .breadcrumb li+li::before {
            content: "›";
            margin-right: 0.6rem;
            color: #8a9aa8;
            font-weight: 600;
        }
        .breadcrumb a {
            color: #2b4f8c;
        }
        .breadcrumb .current {
            color: #5a6a7a;
            font-weight: 500;
        }
        .hero {
            background: linear-gradient(145deg, #f0f4fc 0%, #e6ecf6 100%);
            padding: 2.5rem 0 2rem;
            border-bottom: 1px solid #dce3ed;
        }
        .hero .container {
            display: flex;
            flex-wrap: wrap;
            gap: 2rem;
            align-items: center;
        }
        .hero-text {
            flex: 1 1 55%;
        }
        .hero-image {
            flex: 1 1 35%;
            border-radius: 16px;
            overflow: hidden;
            box-shadow: 0 8px 28px rgba(0, 0, 0, 0.08);
        }
        .hero-image img {
            width: 100%;
            height: auto;
            display: block;
            transition: transform 0.4s;
        }
        .hero-image img:hover {
            transform: scale(1.02);
        }
        .hero-meta {
            display: flex;
            gap: 1.5rem;
            flex-wrap: wrap;
            margin-top: 1rem;
            font-size: 0.9rem;
            color: #4a5a6a;
        }
        .hero-meta i {
            margin-right: 0.4rem;
            color: #2b4f8c;
        }
        .main-content {
            padding: 2.5rem 0 3rem;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2.5rem;
        }
        .content-body {
            min-width: 0;
        }
        .sidebar {
            border-left: 1px solid #e2e8f0;
            padding-left: 2rem;
        }
        .sidebar-section {
            background: #ffffff;
            border-radius: 12px;
            padding: 1.5rem;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.03);
            margin-bottom: 1.8rem;
            border: 1px solid #edf0f5;
        }
        .sidebar-section h3 {
            margin-top: 0;
            font-size: 1.2rem;
            border-bottom: 2px solid #e2e8f0;
            padding-bottom: 0.5rem;
            margin-bottom: 1rem;
        }
        .sidebar-section ul {
            list-style: none;
            padding: 0;
        }
        .sidebar-section li {
            margin-bottom: 0.6rem;
        }
        .sidebar-section li a {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 0.9rem;
            padding: 0.3rem 0;
        }
        .sidebar-section li a i {
            color: #2b4f8c;
            width: 1.2rem;
            font-size: 0.8rem;
        }
        .search-box {
            display: flex;
            border: 2px solid #dce3ed;
            border-radius: 50px;
            overflow: hidden;
            transition: border-color 0.3s;
            background: #fff;
        }
        .search-box:focus-within {
            border-color: #2b4f8c;
        }
        .search-box input {
            flex: 1;
            border: none;
            padding: 0.7rem 1.2rem;
            font-size: 0.95rem;
            outline: none;
            background: transparent;
            min-width: 0;
        }
        .search-box button {
            background: #2b4f8c;
            color: #fff;
            border: none;
            padding: 0.7rem 1.4rem;
            cursor: pointer;
            font-size: 0.95rem;
            transition: background 0.2s;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .search-box button:hover {
            background: #1a355e;
        }
        .interaction-area {
            background: #ffffff;
            border-radius: 16px;
            padding: 2rem;
            margin-top: 2.5rem;
            border: 1px solid #edf0f5;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.03);
        }
        .interaction-area h2 {
            margin-top: 0;
            border-bottom-color: #dce3ed;
        }
        .comment-form,
        .rating-form {
            display: flex;
            flex-direction: column;
            gap: 1rem;
            margin-top: 1.2rem;
        }
        .comment-form textarea,
        .comment-form input,
        .rating-form input,
        .rating-form select {
            padding: 0.8rem 1rem;
            border: 2px solid #e2e8f0;
            border-radius: 10px;
            font-size: 0.95rem;
            font-family: inherit;
            transition: border-color 0.3s;
            background: #fafbfc;
        }
        .comment-form textarea:focus,
        .comment-form input:focus,
        .rating-form input:focus,
        .rating-form select:focus {
            border-color: #2b4f8c;
            outline: none;
            background: #fff;
        }
        .comment-form textarea {
            min-height: 120px;
            resize: vertical;
        }
        .form-row {
            display: flex;
            gap: 1rem;
            flex-wrap: wrap;
        }
        .form-row>* {
            flex: 1 1 200px;
        }
        .btn {
            background: #2b4f8c;
            color: #fff;
            border: none;
            padding: 0.8rem 2rem;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.95rem;
            cursor: pointer;
            transition: background 0.2s, transform 0.1s;
            display: inline-flex;
            align-items: center;
            gap: 0.6rem;
            width: fit-content;
        }
        .btn:hover {
            background: #1a355e;
            transform: translateY(-1px);
        }
        .btn i {
            font-size: 0.9rem;
        }
        .star-rating {
            display: flex;
            gap: 0.3rem;
            font-size: 1.8rem;
            color: #dce3ed;
            cursor: pointer;
            direction: rtl;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            cursor: pointer;
            transition: color 0.2s;
        }
        .star-rating label:hover,
        .star-rating label:hover~label,
        .star-rating input:checked~label {
            color: #f5b342;
        }
        .data-table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.5rem 0;
            font-size: 0.95rem;
        }
        .data-table th {
            background: #f0f4fc;
            font-weight: 600;
            text-align: left;
            padding: 0.8rem 1rem;
            border-bottom: 2px solid #dce3ed;
        }
        .data-table td {
            padding: 0.7rem 1rem;
            border-bottom: 1px solid #edf0f5;
        }
        .data-table tr:hover td {
            background: #f8fafd;
        }
        .info-box {
            background: #f0f4fc;
            border-left: 4px solid #2b4f8c;
            padding: 1.2rem 1.5rem;
            border-radius: 0 12px 12px 0;
            margin: 1.5rem 0;
        }
        .info-box p:last-child {
            margin-bottom: 0;
        }
        .info-box i {
            color: #2b4f8c;
            margin-right: 0.5rem;
        }
        .highlight {
            background: #fef9e7;
            padding: 0.1rem 0.4rem;
            border-radius: 4px;
            font-weight: 600;
        }
        .site-footer {
            background: #0d1b33;
            color: #c8d4e0;
            padding: 2.5rem 0 1.5rem;
            margin-top: 3rem;
            border-top: 4px solid #2b4f8c;
        }
        .site-footer a {
            color: #a8bccf;
        }
        .site-footer a:hover {
            color: #ffffff;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-grid h4 {
            color: #ffffff;
            margin-top: 0;
            font-size: 1.1rem;
            border-bottom: 1px solid #2a4060;
            padding-bottom: 0.5rem;
        }
        .footer-grid ul {
            list-style: none;
            padding: 0;
        }
        .footer-grid li {
            margin-bottom: 0.4rem;
        }
        .footer-grid li a {
            font-size: 0.9rem;
        }
        friend-link {
            display: block;
            padding: 1rem 0;
            border-top: 1px solid #2a4060;
            margin-top: 1rem;
            font-size: 0.9rem;
            color: #8aa0b8;
        }
        friend-link a {
            color: #a8bccf;
            margin: 0 0.5rem 0 0;
        }
        friend-link a:hover {
            color: #ffffff;
        }
        .copyright {
            text-align: center;
            padding-top: 1.2rem;
            border-top: 1px solid #2a4060;
            font-size: 0.85rem;
            color: #6a8098;
        }
        @media (max-width: 992px) {
            .content-grid {
                grid-template-columns: 1fr;
            }
            .sidebar {
                border-left: none;
                padding-left: 0;
                order: 2;
            }
            .content-body {
                order: 1;
            }
            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.6rem;
            }
            h3 {
                font-size: 1.3rem;
            }
        }
        @media (max-width: 768px) {
            .header-inner {
                padding: 0.6rem 0;
            }
            .nav-toggle {
                display: block;
            }
            .nav-menu {
                display: none;
                flex-direction: column;
                width: 100%;
                gap: 0;
                background: #ffffff;
                border-top: 1px solid #e9edf2;
                padding: 1rem 0;
                margin-top: 0.6rem;
            }
            .nav-menu.open {
                display: flex;
            }
            .nav-menu li {
                width: 100%;
                text-align: left;
            }
            .nav-menu li a {
                display: block;
                padding: 0.6rem 1rem;
                border-bottom: 1px solid #f0f2f5;
            }
            .hero .container {
                flex-direction: column;
            }
            .hero-text,
            .hero-image {
                flex: 1 1 100%;
            }
            .hero-image {
                order: -1;
            }
            h1 {
                font-size: 1.7rem;
            }
            .form-row {
                flex-direction: column;
            }
            .search-box {
                flex-direction: row;
            }
            .interaction-area {
                padding: 1.2rem;
            }
            .breadcrumb ol {
                font-size: 0.8rem;
            }
        }
        @media (max-width: 480px) {
            .container {
                padding: 0 14px;
            }
            h1 {
                font-size: 1.4rem;
            }
            h2 {
                font-size: 1.3rem;
            }
            h3 {
                font-size: 1.1rem;
            }
            .my-logo {
                font-size: 1.4rem;
            }
            .btn {
                width: 100%;
                justify-content: center;
            }
        }
        .scroll-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            background: #2b4f8c;
            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 16px rgba(43, 79, 140, 0.3);
            cursor: pointer;
            border: none;
            transition: background 0.2s, transform 0.2s;
            z-index: 99;
            opacity: 0.8;
        }
        .scroll-top:hover {
            background: #1a355e;
            transform: translateY(-3px);
            opacity: 1;
        }
        @media print {
            .site-header,
            .site-footer,
            .scroll-top,
            .search-box,
            .interaction-area {
                display: none !important;
            }
            .sidebar {
                border-left: none;
                padding-left: 0;
            }
        }