*,
        *::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, sans-serif;
            background: #f8f9fc;
            color: #1e293b;
            line-height: 1.7;
            padding: 0;
            margin: 0;
        }
        a {
            color: #2a6f97;
            text-decoration: none;
            transition: color 0.2s;
        }
        a:hover {
            color: #1a4b6d;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 12px;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: linear-gradient(135deg, #0f2b3d, #1a4b6d);
            color: #fff;
            padding: 16px 0;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
            position: sticky;
            top: 0;
            z-index: 100;
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            color: #fff;
            background: rgba(255, 255, 255, 0.1);
            padding: 6px 18px;
            border-radius: 40px;
            border: 2px solid rgba(255, 255, 255, 0.25);
            transition: 0.3s;
            display: inline-block;
        }
        .my-logo:hover {
            background: rgba(255, 255, 255, 0.2);
            transform: scale(1.02);
            text-decoration: none;
            color: #fff;
        }
        .my-logo span {
            color: #facc15;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            color: #fff;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 6px 12px;
            border-radius: 8px;
            transition: background 0.2s;
        }
        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.1);
        }
        nav {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        nav a {
            color: #e2e8f0;
            padding: 8px 16px;
            border-radius: 30px;
            font-size: 0.95rem;
            font-weight: 500;
            transition: 0.2s;
            white-space: nowrap;
        }
        nav a:hover {
            background: rgba(255, 255, 255, 0.15);
            color: #fff;
            text-decoration: none;
        }
        nav a.active {
            background: #facc15;
            color: #0f2b3d;
        }
        .breadcrumb {
            background: #e9edf2;
            padding: 12px 0;
            font-size: 0.9rem;
            border-bottom: 1px solid #dce2ea;
        }
        .breadcrumb ol {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 6px 12px;
        }
        .breadcrumb li+li::before {
            content: "›";
            margin-right: 10px;
            color: #6b7a8f;
            font-weight: 600;
        }
        .breadcrumb a {
            color: #2a6f97;
        }
        .breadcrumb .current {
            color: #1e293b;
            font-weight: 600;
        }
        main {
            padding: 40px 0 60px;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 40px;
        }
        @media (max-width: 1024px) {
            .content-grid {
                grid-template-columns: 1fr;
                gap: 30px;
            }
        }
        .article-body h1 {
            font-size: 2.6rem;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 16px;
            color: #0f2b3d;
        }
        .article-body h1 i {
            color: #facc15;
            margin-right: 10px;
        }
        .article-body h2 {
            font-size: 1.8rem;
            font-weight: 700;
            margin-top: 48px;
            margin-bottom: 16px;
            color: #1a4b6d;
            border-bottom: 3px solid #e2e8f0;
            padding-bottom: 8px;
        }
        .article-body h2 i {
            color: #facc15;
            margin-right: 8px;
        }
        .article-body h3 {
            font-size: 1.4rem;
            font-weight: 600;
            margin-top: 32px;
            margin-bottom: 12px;
            color: #1e293b;
        }
        .article-body h4 {
            font-size: 1.15rem;
            font-weight: 600;
            margin-top: 24px;
            margin-bottom: 8px;
            color: #334155;
        }
        .article-body p {
            margin-bottom: 18px;
            font-size: 1.05rem;
            color: #1e293b;
        }
        .article-body ul,
        .article-body ol {
            margin-bottom: 20px;
            padding-left: 28px;
        }
        .article-body li {
            margin-bottom: 8px;
            font-size: 1.05rem;
        }
        .article-body .highlight-box {
            background: #eef2f7;
            border-left: 5px solid #facc15;
            padding: 20px 24px;
            border-radius: 0 12px 12px 0;
            margin: 24px 0;
        }
        .article-body .highlight-box strong {
            color: #0f2b3d;
        }
        .article-body .stat-badge {
            display: inline-block;
            background: #1a4b6d;
            color: #fff;
            padding: 2px 14px;
            border-radius: 30px;
            font-size: 0.85rem;
            font-weight: 600;
            margin-right: 6px;
        }
        .featured-image {
            margin: 28px 0;
            border-radius: 16px;
            overflow: hidden;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.1);
        }
        .featured-image figcaption {
            background: #e9edf2;
            padding: 10px 18px;
            font-size: 0.9rem;
            color: #475569;
            text-align: center;
        }
        .last-updated {
            display: inline-block;
            background: #e9edf2;
            padding: 6px 18px;
            border-radius: 30px;
            font-size: 0.85rem;
            color: #475569;
            margin-bottom: 20px;
        }
        .last-updated i {
            margin-right: 6px;
        }
        .sidebar {
            background: #fff;
            border-radius: 16px;
            padding: 28px 24px;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
            border: 1px solid #e2e8f0;
            align-self: start;
            position: sticky;
            top: 100px;
        }
        .sidebar h3 {
            font-size: 1.3rem;
            font-weight: 700;
            margin-bottom: 16px;
            color: #0f2b3d;
        }
        .sidebar ul {
            list-style: none;
            padding: 0;
        }
        .sidebar li {
            margin-bottom: 10px;
            border-bottom: 1px solid #f1f5f9;
            padding-bottom: 10px;
        }
        .sidebar li a {
            font-weight: 500;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sidebar li a i {
            color: #facc15;
            font-size: 0.8rem;
        }
        .search-section {
            background: #fff;
            border-radius: 16px;
            padding: 24px 28px;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
            border: 1px solid #e2e8f0;
            margin-bottom: 30px;
        }
        .search-section h3 {
            font-size: 1.3rem;
            font-weight: 700;
            margin-bottom: 12px;
            color: #0f2b3d;
        }
        .search-form {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }
        .search-form input {
            flex: 1;
            min-width: 180px;
            padding: 12px 18px;
            border: 2px solid #dce2ea;
            border-radius: 40px;
            font-size: 1rem;
            outline: none;
            transition: 0.3s;
        }
        .search-form input:focus {
            border-color: #2a6f97;
            box-shadow: 0 0 0 3px rgba(42, 111, 151, 0.15);
        }
        .search-form button {
            padding: 12px 28px;
            background: #1a4b6d;
            color: #fff;
            border: none;
            border-radius: 40px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: 0.3s;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .search-form button:hover {
            background: #0f2b3d;
            transform: scale(1.02);
        }
        .feedback-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
            margin-top: 30px;
        }
        @media (max-width: 768px) {
            .feedback-grid {
                grid-template-columns: 1fr;
            }
        }
        .feedback-card {
            background: #fff;
            border-radius: 16px;
            padding: 24px 28px;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
            border: 1px solid #e2e8f0;
        }
        .feedback-card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 16px;
            color: #0f2b3d;
        }
        .feedback-card form {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .feedback-card input,
        .feedback-card textarea,
        .feedback-card select {
            padding: 12px 16px;
            border: 2px solid #dce2ea;
            border-radius: 12px;
            font-size: 1rem;
            outline: none;
            transition: 0.3s;
            font-family: inherit;
        }
        .feedback-card input:focus,
        .feedback-card textarea:focus,
        .feedback-card select:focus {
            border-color: #2a6f97;
            box-shadow: 0 0 0 3px rgba(42, 111, 151, 0.1);
        }
        .feedback-card textarea {
            min-height: 100px;
            resize: vertical;
        }
        .feedback-card .star-select {
            display: flex;
            gap: 6px;
            font-size: 1.6rem;
            color: #d1d5db;
            cursor: pointer;
        }
        .feedback-card .star-select i {
            transition: 0.2s;
        }
        .feedback-card .star-select i:hover,
        .feedback-card .star-select i.active {
            color: #facc15;
        }
        .feedback-card button {
            padding: 12px 24px;
            background: #1a4b6d;
            color: #fff;
            border: none;
            border-radius: 40px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: 0.3s;
            align-self: flex-start;
        }
        .feedback-card button:hover {
            background: #0f2b3d;
            transform: scale(1.02);
        }
        footer {
            background: #0f2b3d;
            color: #cbd5e1;
            padding: 40px 0 24px;
            border-top: 4px solid #facc15;
        }
        footer .footer-inner {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
        }
        @media (max-width: 768px) {
            footer .footer-inner {
                grid-template-columns: 1fr;
                gap: 24px;
            }
        }
        footer h4 {
            color: #fff;
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 12px;
        }
        footer a {
            color: #a0b4c9;
        }
        footer a:hover {
            color: #facc15;
        }
        footer ul {
            list-style: none;
            padding: 0;
        }
        footer li {
            margin-bottom: 6px;
        }
        friend-link {
            display: block;
            background: rgba(255, 255, 255, 0.05);
            padding: 16px 20px;
            border-radius: 12px;
            border: 1px solid rgba(255, 255, 255, 0.08);
            margin-top: 12px;
        }
        friend-link a {
            display: inline-block;
            margin-right: 16px;
            margin-bottom: 6px;
            padding: 4px 12px;
            background: rgba(255, 255, 255, 0.08);
            border-radius: 30px;
            font-size: 0.9rem;
            transition: 0.2s;
        }
        friend-link a:hover {
            background: #facc15;
            color: #0f2b3d;
            text-decoration: none;
        }
        .copyright {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 20px;
            margin-top: 28px;
            text-align: center;
            font-size: 0.9rem;
            color: #8899aa;
        }
        @media (max-width: 768px) {
            .nav-toggle {
                display: block;
            }
            nav {
                display: none;
                width: 100%;
                flex-direction: column;
                background: rgba(15, 43, 61, 0.98);
                padding: 16px 0 20px;
                border-radius: 0 0 16px 16px;
                margin-top: 12px;
                gap: 4px;
            }
            nav.open {
                display: flex;
            }
            nav a {
                padding: 10px 20px;
                width: 100%;
                text-align: center;
                border-radius: 0;
            }
            .my-logo {
                font-size: 1.4rem;
            }
            .article-body h1 {
                font-size: 1.8rem;
            }
            .article-body h2 {
                font-size: 1.4rem;
            }
            .article-body h3 {
                font-size: 1.2rem;
            }
            .container {
                padding: 0 14px;
            }
            .sidebar {
                position: static;
            }
        }
        @media (min-width: 769px) and (max-width: 1024px) {
            .article-body h1 {
                font-size: 2.2rem;
            }
        }
        ::-webkit-scrollbar {
            width: 8px;
        }
        ::-webkit-scrollbar-track {
            background: #e9edf2;
        }
        ::-webkit-scrollbar-thumb {
            background: #a0b4c9;
            border-radius: 10px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: #6b7a8f;
        }
        .mt-1 {
            margin-top: 12px;
        }
        .mb-1 {
            margin-bottom: 12px;
        }
        .text-sm {
            font-size: 0.95rem;
        }
        .flex {
            display: flex;
        }
        .gap-2 {
            gap: 8px;
        }
        .items-center {
            align-items: center;
        }