*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, 'Helvetica Neue', Arial, sans-serif;
            background: #0b0f1a;
            color: #e8edf5;
            line-height: 1.75;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        a {
            color: #6fc3ff;
            text-decoration: none;
            transition: color 0.25s ease;
        }
        a:hover,
        a:focus-visible {
            color: #ffd966;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 12px;
        }
        ul,
        ol {
            padding-left: 1.5rem;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.3;
            color: #ffffff;
            margin-top: 0;
        }
        h1 {
            font-size: 2.4rem;
            margin-bottom: 0.75rem;
        }
        h2 {
            font-size: 1.9rem;
            margin: 2.2rem 0 0.8rem 0;
            border-bottom: 2px solid #1e3a5f;
            padding-bottom: 0.5rem;
        }
        h3 {
            font-size: 1.5rem;
            margin: 1.8rem 0 0.6rem 0;
            color: #b8d4f0;
        }
        h4 {
            font-size: 1.2rem;
            margin: 1.2rem 0 0.4rem 0;
            color: #9bb8dd;
        }
        p {
            margin-bottom: 1.2rem;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.2rem;
            width: 100%;
        }
        .text-center {
            text-align: center;
        }
        .text-muted {
            color: #9aaec9;
        }
        .mt-1 {
            margin-top: 1rem;
        }
        .mt-2 {
            margin-top: 2rem;
        }
        .mb-1 {
            margin-bottom: 1rem;
        }
        .mb-2 {
            margin-bottom: 2rem;
        }
        .fw-bold {
            font-weight: 700;
        }
        .small {
            font-size: 0.85rem;
        }
        .emoji {
            font-style: normal;
        }
        .badge {
            display: inline-block;
            background: #1e3a5f;
            color: #b8d4f0;
            padding: 0.2rem 0.8rem;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.3px;
        }
        .site-header {
            background: #111827;
            border-bottom: 1px solid #1e3a5f;
            padding: 0.8rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            backdrop-filter: blur(8px);
            background: rgba(11, 15, 26, 0.96);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 0.8rem 1.5rem;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            background: linear-gradient(135deg, #6fc3ff, #ffd966);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: -0.5px;
            display: inline-flex;
            align-items: center;
            gap: 0.3rem;
        }
        .my-logo i {
            -webkit-text-fill-color: #6fc3ff;
            font-size: 1.6rem;
        }
        .my-logo:hover {
            opacity: 0.9;
            text-decoration: none;
        }
        .nav-bar {
            display: flex;
            align-items: center;
            gap: 0.3rem 0.8rem;
            flex-wrap: wrap;
        }
        .nav-bar a {
            padding: 0.4rem 0.9rem;
            border-radius: 30px;
            font-weight: 500;
            font-size: 0.9rem;
            color: #c8d8e8;
            transition: background 0.2s, color 0.2s;
            white-space: nowrap;
        }
        .nav-bar a:hover,
        .nav-bar a:focus-visible {
            background: #1e3a5f;
            color: #ffd966;
            text-decoration: none;
        }
        .nav-bar a.active {
            background: #1e3a5f;
            color: #ffd966;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: #e8edf5;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 0.2rem 0.5rem;
            border-radius: 8px;
            transition: background 0.2s;
        }
        .hamburger:hover {
            background: #1e3a5f;
        }
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 0.4rem 0.6rem;
            padding: 0.8rem 0 0.2rem 0;
            font-size: 0.85rem;
            color: #9aaec9;
            list-style: none;
        }
        .breadcrumb li+li::before {
            content: "▸";
            margin-right: 0.6rem;
            color: #3a5a7a;
        }
        .breadcrumb a {
            color: #6fc3ff;
        }
        .breadcrumb a:hover {
            color: #ffd966;
        }
        .breadcrumb .current {
            color: #b8d4f0;
        }
        .hero {
            padding: 2.5rem 0 1.5rem 0;
            background: linear-gradient(160deg, #0f1a2e 0%, #0b0f1a 100%);
            border-radius: 0 0 40px 40px;
        }
        .hero h1 {
            font-size: 2.6rem;
            line-height: 1.2;
        }
        .hero .subhead {
            font-size: 1.15rem;
            color: #b8d4f0;
            max-width: 760px;
        }
        .hero-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem 2rem;
            margin-top: 1.2rem;
            align-items: center;
        }
        .hero-meta span {
            font-size: 0.9rem;
            color: #9aaec9;
        }
        .hero-meta i {
            margin-right: 0.4rem;
            color: #6fc3ff;
        }
        .last-updated {
            background: #1e3a5f;
            padding: 0.2rem 1rem;
            border-radius: 30px;
            font-weight: 600;
        }
        .img-card {
            margin: 2rem 0;
            border-radius: 16px;
            overflow: hidden;
            background: #111827;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.6);
        }
        .img-card img {
            width: 100%;
            max-height: 480px;
            object-fit: cover;
        }
        .img-card .img-caption {
            padding: 0.8rem 1.2rem;
            font-size: 0.85rem;
            color: #9aaec9;
            background: #111827;
            border-top: 1px solid #1e3a5f;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 2rem 3rem;
        }
        @media (min-width: 992px) {
            .content-grid {
                grid-template-columns: 1fr 300px;
            }
            .content-grid .main-col {
                order: 1;
            }
            .content-grid .side-col {
                order: 2;
            }
        }
        .side-col .card {
            background: #111827;
            border-radius: 16px;
            padding: 1.5rem;
            margin-bottom: 1.8rem;
            border: 1px solid #1e3a5f;
        }
        .side-col .card h3 {
            margin-top: 0;
            font-size: 1.2rem;
            border-bottom: 2px solid #1e3a5f;
            padding-bottom: 0.5rem;
        }
        .side-col .card ul {
            list-style: none;
            padding-left: 0;
        }
        .side-col .card ul li {
            padding: 0.5rem 0;
            border-bottom: 1px solid #1a2a40;
        }
        .side-col .card ul li:last-child {
            border-bottom: none;
        }
        .side-col .card ul li a {
            display: flex;
            align-items: center;
            gap: 0.6rem;
        }
        .side-col .card ul li a i {
            color: #6fc3ff;
            font-size: 0.8rem;
        }
        .link-list-inline {
            display: flex;
            flex-wrap: wrap;
            gap: 0.6rem 1rem;
            list-style: none;
            padding: 0.8rem 0;
        }
        .link-list-inline li a {
            background: #1a2a40;
            padding: 0.3rem 1rem;
            border-radius: 30px;
            font-size: 0.85rem;
            color: #b8d4f0;
            transition: background 0.2s, color 0.2s;
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
        }
        .link-list-inline li a:hover {
            background: #1e3a5f;
            color: #ffd966;
            text-decoration: none;
        }
        .search-form {
            display: flex;
            gap: 0.5rem;
            width: 100%;
            max-width: 600px;
            margin: 1.2rem 0;
        }
        .search-form input[type="text"] {
            flex: 1;
            padding: 0.7rem 1.2rem;
            border-radius: 40px;
            border: 1px solid #2a4a6a;
            background: #111827;
            color: #e8edf5;
            font-size: 1rem;
            outline: none;
            transition: border 0.3s, box-shadow 0.3s;
        }
        .search-form input[type="text"]:focus {
            border-color: #6fc3ff;
            box-shadow: 0 0 0 3px rgba(111, 195, 255, 0.2);
        }
        .search-form button {
            padding: 0.7rem 1.8rem;
            border-radius: 40px;
            border: none;
            background: #1e3a5f;
            color: #e8edf5;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.25s, transform 0.1s;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
        }
        .search-form button:hover {
            background: #2a5a8a;
            transform: scale(1.02);
        }
        .feedback-section {
            background: #111827;
            border-radius: 20px;
            padding: 2rem 1.8rem;
            margin: 2.5rem 0;
            border: 1px solid #1e3a5f;
        }
        .feedback-section h2 {
            border-bottom-color: #2a5a8a;
            margin-top: 0;
        }
        .form-group {
            margin-bottom: 1.2rem;
        }
        .form-group label {
            display: block;
            font-weight: 600;
            margin-bottom: 0.3rem;
            color: #b8d4f0;
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 0.7rem 1rem;
            border-radius: 10px;
            border: 1px solid #2a4a6a;
            background: #0b0f1a;
            color: #e8edf5;
            font-size: 1rem;
            font-family: inherit;
            transition: border 0.3s;
        }
        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            border-color: #6fc3ff;
            outline: none;
        }
        .form-group textarea {
            min-height: 100px;
            resize: vertical;
        }
        .form-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1rem;
        }
        @media (max-width: 600px) {
            .form-row {
                grid-template-columns: 1fr;
            }
        }
        .btn-primary {
            padding: 0.8rem 2.5rem;
            border-radius: 40px;
            border: none;
            background: linear-gradient(135deg, #1e3a5f, #2a5a8a);
            color: #ffffff;
            font-weight: 700;
            font-size: 1rem;
            cursor: pointer;
            transition: transform 0.2s, box-shadow 0.3s;
            display: inline-flex;
            align-items: center;
            gap: 0.6rem;
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(42, 90, 138, 0.4);
        }
        .star-rating {
            display: flex;
            flex-direction: row-reverse;
            gap: 0.3rem;
            justify-content: flex-end;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            font-size: 1.8rem;
            color: #3a5a7a;
            cursor: pointer;
            transition: color 0.2s, transform 0.1s;
        }
        .star-rating label:hover,
        .star-rating label:hover~label,
        .star-rating input:checked~label {
            color: #ffd966;
            transform: scale(1.1);
        }
        .site-footer {
            background: #0a0e17;
            border-top: 1px solid #1e3a5f;
            padding: 2.5rem 0 1.5rem 0;
            margin-top: auto;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1.5rem 2rem;
        }
        @media (max-width: 700px) {
            .footer-grid {
                grid-template-columns: 1fr;
            }
        }
        .footer-grid h4 {
            color: #6fc3ff;
            margin-bottom: 0.8rem;
            font-size: 1.1rem;
        }
        friend-link {
            display: block;
        }
        friend-link ul {
            list-style: none;
            padding-left: 0;
        }
        friend-link ul li {
            padding: 0.3rem 0;
        }
        friend-link ul li a {
            color: #9aaec9;
            font-size: 0.9rem;
        }
        friend-link ul li a:hover {
            color: #ffd966;
        }
        .copyright {
            text-align: center;
            padding-top: 1.8rem;
            margin-top: 1.8rem;
            border-top: 1px solid #1a2a40;
            font-size: 0.85rem;
            color: #6a7e9a;
        }
        .copyright a {
            color: #6fc3ff;
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
            .nav-bar {
                display: none;
                flex-direction: column;
                width: 100%;
                background: #111827;
                padding: 1rem 0.5rem;
                border-radius: 16px;
                margin-top: 0.5rem;
                border: 1px solid #1e3a5f;
            }
            .nav-bar.open {
                display: flex;
            }
            .nav-bar a {
                width: 100%;
                padding: 0.7rem 1rem;
            }
            .header-inner {
                align-items: center;
            }
            h1 {
                font-size: 1.9rem;
            }
            h2 {
                font-size: 1.5rem;
            }
            h3 {
                font-size: 1.25rem;
            }
            .hero h1 {
                font-size: 1.9rem;
            }
            .hero .subhead {
                font-size: 1rem;
            }
            .search-form {
                flex-wrap: wrap;
            }
            .search-form button {
                width: 100%;
                justify-content: center;
            }
        }
        @media (max-width: 480px) {
            .container {
                padding: 0 0.9rem;
            }
            .hero-meta {
                flex-direction: column;
                gap: 0.4rem;
            }
            .feedback-section {
                padding: 1.5rem 1rem;
            }
        }
        :target {
            scroll-margin-top: 100px;
        }
        .table-wrap {
            overflow-x: auto;
            margin: 1.5rem 0;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            background: #111827;
            border-radius: 12px;
            overflow: hidden;
        }
        th,
        td {
            padding: 0.8rem 1rem;
            text-align: left;
            border-bottom: 1px solid #1a2a40;
        }
        th {
            background: #1e3a5f;
            color: #ffd966;
            font-weight: 700;
        }
        tr:last-child td {
            border-bottom: none;
        }
        tr:hover td {
            background: #0f1a2e;
        }
        blockquote {
            border-left: 4px solid #6fc3ff;
            padding: 0.8rem 1.5rem;
            margin: 1.5rem 0;
            background: #0f1a2e;
            border-radius: 0 12px 12px 0;
            font-style: italic;
            color: #b8d4f0;
        }
        blockquote cite {
            display: block;
            margin-top: 0.5rem;
            font-size: 0.85rem;
            color: #6a7e9a;
            font-style: normal;
        }
        .highlight {
            background: #1e3a5f;
            padding: 0.1rem 0.4rem;
            border-radius: 6px;
            font-weight: 600;
        }
        .key-point {
            background: #0f1a2e;
            border-left: 4px solid #ffd966;
            padding: 1rem 1.5rem;
            border-radius: 0 12px 12px 0;
            margin: 1.2rem 0;
        }
        .key-point i {
            color: #ffd966;
            margin-right: 0.6rem;
        }
        ::-webkit-scrollbar {
            width: 8px;
            height: 8px;
        }
        ::-webkit-scrollbar-track {
            background: #0b0f1a;
        }
        ::-webkit-scrollbar-thumb {
            background: #1e3a5f;
            border-radius: 10px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: #2a5a8a;
        }