*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            background: #f5f7fb;
            color: #1a1a2e;
            line-height: 1.7;
            padding: 0;
            margin: 0;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: #0057b3;
            text-decoration: none;
            transition: color 0.2s;
        }
        a:hover {
            color: #ff6b35;
            text-decoration: underline;
        }
        ul,
        ol {
            padding-left: 1.5rem;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            color: #0d1b2a;
            margin-top: 1.5em;
            margin-bottom: 0.5em;
        }
        h1 {
            font-size: 2.2rem;
            margin-top: 0.2em;
        }
        h2 {
            font-size: 1.7rem;
            border-left: 5px solid #ff6b35;
            padding-left: 0.8rem;
        }
        h3 {
            font-size: 1.3rem;
            color: #1b3a5c;
        }
        h4 {
            font-size: 1.1rem;
            color: #2c3e50;
        }
        p {
            margin-bottom: 1.2rem;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1rem;
        }
        .skip-link {
            position: absolute;
            top: -100%;
            left: 1rem;
            background: #ff6b35;
            color: #fff;
            padding: 0.5rem 1.2rem;
            border-radius: 0 0 6px 6px;
            z-index: 9999;
            font-weight: 600;
        }
        .skip-link:focus {
            top: 0;
        }
        .site-header {
            background: linear-gradient(135deg, #0d1b2a 0%, #1b3a5c 100%);
            color: #fff;
            padding: 0.8rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 2px 15px rgba(0, 0, 0, 0.3);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 0.5rem 1rem;
        }
        .my-logo {
            font-size: 1.6rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            color: #fff;
            background: linear-gradient(135deg, #ff6b35, #f7931e);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }
        .my-logo i {
            -webkit-text-fill-color: #ff6b35;
            font-size: 1.8rem;
        }
        .my-logo:hover {
            opacity: 0.9;
            text-decoration: none;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: 2px solid rgba(255, 255, 255, 0.3);
            color: #fff;
            font-size: 1.5rem;
            padding: 0.3rem 0.7rem;
            border-radius: 6px;
            cursor: pointer;
            transition: background 0.2s;
        }
        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.1);
        }
        .nav-menu {
            display: flex;
            gap: 0.2rem;
            flex-wrap: wrap;
            align-items: center;
        }
        .nav-menu a {
            color: #e0e7ef;
            padding: 0.4rem 0.9rem;
            border-radius: 6px;
            font-size: 0.92rem;
            font-weight: 500;
            transition: background 0.2s, color 0.2s;
            white-space: nowrap;
        }
        .nav-menu a:hover {
            background: rgba(255, 107, 53, 0.25);
            color: #fff;
            text-decoration: none;
        }
        .nav-menu a i {
            margin-right: 0.3rem;
        }
        .breadcrumb-wrap {
            background: #e9edf4;
            padding: 0.5rem 0;
            font-size: 0.88rem;
        }
        .breadcrumb-wrap nav ol {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            padding: 0;
            margin: 0;
            gap: 0.3rem 0.1rem;
        }
        .breadcrumb-wrap nav ol li+li::before {
            content: "›";
            margin: 0 0.4rem;
            color: #7f8c9b;
        }
        .breadcrumb-wrap a {
            color: #0057b3;
        }
        .breadcrumb-wrap .current {
            color: #4a5568;
            font-weight: 500;
        }
        .main-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2rem;
            padding: 2rem 0;
        }
        @media (max-width: 900px) {
            .main-grid {
                grid-template-columns: 1fr;
            }
        }
        .sidebar {
            background: #fff;
            border-radius: 16px;
            padding: 1.5rem 1.2rem;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
            height: fit-content;
            position: sticky;
            top: 5.5rem;
        }
        .sidebar h3 {
            margin-top: 0;
            font-size: 1.2rem;
            border-bottom: 2px solid #ff6b35;
            padding-bottom: 0.4rem;
            margin-bottom: 1rem;
        }
        .sidebar ul {
            list-style: none;
            padding: 0;
        }
        .sidebar ul li {
            padding: 0.3rem 0;
            border-bottom: 1px solid #f0f2f5;
        }
        .sidebar ul li a {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            color: #2d3748;
        }
        .sidebar ul li a:hover {
            color: #ff6b35;
        }
        .sidebar ul li a i {
            width: 1.2rem;
            color: #ff6b35;
        }
        @media (max-width: 900px) {
            .sidebar {
                position: static;
                margin-top: 1rem;
            }
        }
        .content {
            background: #fff;
            border-radius: 16px;
            padding: 2rem 2.2rem;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
        }
        @media (max-width: 600px) {
            .content {
                padding: 1.2rem 1rem;
            }
            h1 {
                font-size: 1.6rem;
            }
            h2 {
                font-size: 1.3rem;
            }
            h3 {
                font-size: 1.1rem;
            }
        }
        .featured-image {
            border-radius: 14px;
            overflow: hidden;
            margin: 1.8rem 0;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
        }
        .featured-image img {
            width: 100%;
            height: auto;
            object-fit: cover;
        }
        .featured-image figcaption {
            background: #f8f9fc;
            padding: 0.6rem 1rem;
            font-size: 0.88rem;
            color: #4a5568;
            border-top: 1px solid #e9edf4;
        }
        .data-table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.5rem 0;
            font-size: 0.95rem;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.04);
        }
        .data-table thead {
            background: #0d1b2a;
            color: #fff;
        }
        .data-table th,
        .data-table td {
            padding: 0.7rem 1rem;
            text-align: left;
            border-bottom: 1px solid #e9edf4;
        }
        .data-table tbody tr:hover {
            background: #f8f9fc;
        }
        @media (max-width: 600px) {
            .data-table {
                font-size: 0.82rem;
            }
            .data-table th,
            .data-table td {
                padding: 0.4rem 0.5rem;
            }
        }
        .search-section {
            background: #f0f4ff;
            border-radius: 12px;
            padding: 1.5rem;
            margin: 2rem 0 1.5rem;
        }
        .search-form {
            display: flex;
            gap: 0.5rem;
            flex-wrap: wrap;
        }
        .search-form input[type="text"] {
            flex: 1;
            min-width: 180px;
            padding: 0.7rem 1rem;
            border: 2px solid #d1d9e6;
            border-radius: 8px;
            font-size: 1rem;
            outline: none;
            transition: border 0.2s;
        }
        .search-form input[type="text"]:focus {
            border-color: #ff6b35;
        }
        .search-form button {
            padding: 0.7rem 1.6rem;
            background: #0d1b2a;
            color: #fff;
            border: none;
            border-radius: 8px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.2s, transform 0.1s;
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }
        .search-form button:hover {
            background: #ff6b35;
            transform: scale(1.02);
        }
        .feedback-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1.5rem;
            margin: 2rem 0;
        }
        @media (max-width: 700px) {
            .feedback-grid {
                grid-template-columns: 1fr;
            }
        }
        .feedback-card {
            background: #f8f9fc;
            border-radius: 14px;
            padding: 1.5rem;
            border: 1px solid #e9edf4;
        }
        .feedback-card h3 {
            margin-top: 0;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .feedback-card form {
            display: flex;
            flex-direction: column;
            gap: 0.8rem;
        }
        .feedback-card input,
        .feedback-card textarea {
            padding: 0.6rem 0.9rem;
            border: 2px solid #d1d9e6;
            border-radius: 8px;
            font-size: 0.95rem;
            outline: none;
            transition: border 0.2s;
            font-family: inherit;
        }
        .feedback-card input:focus,
        .feedback-card textarea:focus {
            border-color: #ff6b35;
        }
        .feedback-card textarea {
            min-height: 90px;
            resize: vertical;
        }
        .feedback-card button {
            padding: 0.6rem 1.4rem;
            background: #ff6b35;
            color: #fff;
            border: none;
            border-radius: 8px;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.2s, transform 0.1s;
            align-self: flex-start;
        }
        .feedback-card button:hover {
            background: #e0552a;
            transform: scale(1.02);
        }
        .star-rating {
            display: flex;
            flex-direction: row-reverse;
            gap: 0.2rem;
            justify-content: flex-end;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            font-size: 1.7rem;
            color: #d1d9e6;
            cursor: pointer;
            transition: color 0.15s;
        }
        .star-rating label:hover,
        .star-rating label:hover~label,
        .star-rating input:checked~label {
            color: #ffb703;
        }
        .related-links {
            background: #f8f9fc;
            border-radius: 12px;
            padding: 1.2rem 1.5rem;
            margin: 1.8rem 0;
            border-left: 4px solid #ff6b35;
        }
        .related-links ul {
            display: flex;
            flex-wrap: wrap;
            gap: 0.6rem 1.2rem;
            list-style: none;
            padding: 0;
            margin: 0.5rem 0 0;
        }
        .related-links ul li a {
            color: #0057b3;
            font-weight: 500;
        }
        .related-links ul li a:hover {
            color: #ff6b35;
        }
        .site-footer {
            background: #0d1b2a;
            color: #cdd9e6;
            padding: 2.5rem 0 1.5rem;
            margin-top: 2rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 2rem;
            margin-bottom: 1.5rem;
        }
        @media (max-width: 700px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 1.2rem;
            }
        }
        .footer-grid h4 {
            color: #fff;
            margin-top: 0;
            font-size: 1.1rem;
            border-bottom: 2px solid #ff6b35;
            padding-bottom: 0.3rem;
            display: inline-block;
        }
        .footer-grid a {
            color: #aab9d6;
        }
        .footer-grid a:hover {
            color: #ff6b35;
        }
        .friend-link {
            display: block;
            padding: 0.3rem 0;
        }
        .friend-link a {
            margin-right: 1.2rem;
        }
        .copyright {
            border-top: 1px solid #1e3a5f;
            padding-top: 1.2rem;
            text-align: center;
            font-size: 0.88rem;
            color: #8899b0;
        }
        .copyright a {
            color: #ff6b35;
        }
        @media (max-width: 760px) {
            .nav-toggle {
                display: block;
            }
            .nav-menu {
                display: none;
                flex-direction: column;
                width: 100%;
                background: #0d1b2a;
                padding: 0.5rem 0 0.8rem;
                border-radius: 0 0 12px 12px;
                gap: 0.1rem;
            }
            .nav-menu.open {
                display: flex;
            }
            .nav-menu a {
                padding: 0.6rem 1rem;
                width: 100%;
                border-radius: 0;
            }
            .nav-menu a:hover {
                background: rgba(255, 107, 53, 0.2);
            }
            .header-inner {
                align-items: center;
            }
        }
        .text-muted {
            color: #6b7a8f;
            font-size: 0.9rem;
        }
        .last-updated {
            display: inline-block;
            background: #eef2f7;
            padding: 0.2rem 0.8rem;
            border-radius: 20px;
            font-size: 0.82rem;
            color: #4a5568;
            margin-bottom: 0.8rem;
        }
        .highlight-box {
            background: #fff8f0;
            border-left: 4px solid #ff6b35;
            padding: 1rem 1.5rem;
            border-radius: 0 10px 10px 0;
            margin: 1.5rem 0;
        }
        .emoji-lg {
            font-size: 1.4rem;
        }
        .btn-top {
            position: fixed;
            bottom: 1.5rem;
            right: 1.5rem;
            background: #0d1b2a;
            color: #fff;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
            transition: background 0.2s, transform 0.2s;
            z-index: 999;
            border: none;
            cursor: pointer;
        }
        .btn-top:hover {
            background: #ff6b35;
            transform: translateY(-3px);
        }
        @media (max-width: 480px) {
            .container {
                padding: 0 0.6rem;
            }
            .content {
                padding: 0.8rem 0.6rem;
                border-radius: 10px;
            }
            .feedback-card {
                padding: 1rem;
            }
            .search-section {
                padding: 1rem;
            }
        }
        ::-webkit-scrollbar {
            width: 8px;
        }
        ::-webkit-scrollbar-track {
            background: #f0f2f5;
        }
        ::-webkit-scrollbar-thumb {
            background: #b0bccf;
            border-radius: 10px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: #8a9bb0;
        }
        @media print {
            .site-header,
            .nav-toggle,
            .btn-top,
            .search-section,
            .feedback-grid {
                display: none !important;
            }
            .content {
                box-shadow: none;
                padding: 0;
            }
            .sidebar {
                position: static;
                box-shadow: none;
            }
        }