*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
            background: #f4f7fb;
            color: #1e2a3a;
            line-height: 1.7;
            padding: 0 1rem;
            max-width: 1280px;
            margin: 0 auto;
        }
        a {
            color: #0066c0;
            text-decoration: none;
            transition: color 0.2s;
        }
        a:hover {
            color: #003d6b;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 12px;
        }
        h1,
        h2,
        h3,
        h4 {
            font-weight: 700;
            line-height: 1.3;
            letter-spacing: -0.01em;
            color: #0b1a2a;
        }
        h1 {
            font-size: 2.2rem;
            margin: 1.5rem 0 0.8rem;
        }
        h2 {
            font-size: 1.7rem;
            margin: 2.2rem 0 0.8rem;
            border-left: 5px solid #f5a623;
            padding-left: 1rem;
        }
        h3 {
            font-size: 1.3rem;
            margin: 1.6rem 0 0.6rem;
        }
        h4 {
            font-size: 1.05rem;
            margin: 1.2rem 0 0.4rem;
            color: #2c3e50;
        }
        p {
            margin-bottom: 1.2rem;
            font-size: 1.02rem;
        }
        ul,
        ol {
            margin: 0.8rem 0 1.4rem 1.8rem;
        }
        li {
            margin-bottom: 0.4rem;
        }
        .container {
            background: #ffffff;
            border-radius: 24px;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.06);
            padding: 1.6rem 1.8rem;
            margin: 1.2rem 0 2rem;
        }
        .badge {
            display: inline-block;
            background: #f5a623;
            color: #0b1a2a;
            font-size: 0.75rem;
            font-weight: 700;
            padding: 0.2rem 0.8rem;
            border-radius: 30px;
            letter-spacing: 0.3px;
        }
        .highlight {
            background: #fef7e9;
            padding: 0.1rem 0.4rem;
            border-radius: 6px;
            font-weight: 600;
        }
        .emoji-lg {
            font-size: 1.8rem;
            vertical-align: middle;
        }
        header {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            padding: 1rem 0 0.6rem;
            border-bottom: 2px solid #e6edf4;
            position: relative;
        }
        .my-logo {
            font-size: 2rem;
            font-weight: 800;
            color: #0b1a2a;
            letter-spacing: -0.03em;
            background: linear-gradient(135deg, #1a3a5c, #f5a623);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            display: inline-block;
        }
        .my-logo small {
            font-size: 0.9rem;
            font-weight: 400;
            -webkit-text-fill-color: #5a7a9a;
            color: #5a7a9a;
            letter-spacing: 0;
        }
        .my-logo a {
            text-decoration: none;
            background: none;
            -webkit-text-fill-color: transparent;
        }
        .my-logo a:hover {
            opacity: 0.8;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.8rem;
            color: #1e2a3a;
            cursor: pointer;
            padding: 0.2rem 0.6rem;
            border-radius: 8px;
            transition: background 0.2s;
        }
        .nav-toggle:hover {
            background: #e6edf4;
        }
        nav {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 0.4rem 1.2rem;
        }
        nav a {
            font-weight: 600;
            font-size: 0.95rem;
            padding: 0.3rem 0.2rem;
            border-bottom: 2px solid transparent;
            transition: border-color 0.2s, color 0.2s;
        }
        nav a:hover {
            border-bottom-color: #f5a623;
            text-decoration: none;
        }
        nav a.active {
            border-bottom-color: #f5a623;
            color: #003d6b;
        }
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 0.4rem 0.6rem;
            font-size: 0.85rem;
            color: #5a7a9a;
            margin: 0.6rem 0 0.2rem;
            padding: 0.4rem 0;
            width: 100%;
        }
        .breadcrumb a {
            color: #5a7a9a;
            font-weight: 500;
        }
        .breadcrumb a:hover {
            color: #0066c0;
        }
        .breadcrumb .sep {
            color: #b0c4d8;
        }
        .breadcrumb .current {
            font-weight: 600;
            color: #1e2a3a;
        }
        .search-box {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
            background: #f0f4fa;
            border-radius: 60px;
            padding: 0.3rem 0.3rem 0.3rem 1.2rem;
            align-items: center;
            max-width: 520px;
            margin: 1.8rem 0 1.2rem;
            border: 1px solid #dce5ef;
            transition: box-shadow 0.3s;
        }
        .search-box:focus-within {
            box-shadow: 0 0 0 3px rgba(245, 166, 35, 0.25);
            border-color: #f5a623;
        }
        .search-box i {
            color: #7a9abb;
            font-size: 1.1rem;
        }
        .search-box input {
            flex: 1;
            border: none;
            background: transparent;
            padding: 0.6rem 0;
            font-size: 1rem;
            outline: none;
            min-width: 120px;
            font-family: inherit;
        }
        .search-box button {
            background: #1a3a5c;
            color: #fff;
            border: none;
            padding: 0.6rem 1.5rem;
            border-radius: 60px;
            font-weight: 600;
            font-size: 0.9rem;
            cursor: pointer;
            transition: background 0.25s, transform 0.1s;
            font-family: inherit;
        }
        .search-box button:hover {
            background: #f5a623;
            color: #0b1a2a;
        }
        .search-box button:active {
            transform: scale(0.96);
        }
        .feedback-section {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1.8rem;
            margin: 2.5rem 0 1.8rem;
            padding: 1.8rem 0;
            border-top: 2px solid #e6edf4;
            border-bottom: 2px solid #e6edf4;
        }
        .feedback-card {
            background: #f8fafd;
            border-radius: 18px;
            padding: 1.4rem 1.6rem;
            border: 1px solid #e6edf4;
        }
        .feedback-card h3 {
            margin-top: 0;
            font-size: 1.2rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .feedback-card form {
            display: flex;
            flex-direction: column;
            gap: 0.8rem;
            margin-top: 0.6rem;
        }
        .feedback-card input,
        .feedback-card textarea,
        .feedback-card select {
            padding: 0.7rem 1rem;
            border: 1px solid #dce5ef;
            border-radius: 12px;
            font-size: 0.95rem;
            font-family: inherit;
            background: #fff;
            transition: border-color 0.2s;
        }
        .feedback-card input:focus,
        .feedback-card textarea:focus,
        .feedback-card select:focus {
            border-color: #f5a623;
            outline: none;
            box-shadow: 0 0 0 3px rgba(245, 166, 35, 0.15);
        }
        .feedback-card textarea {
            min-height: 90px;
            resize: vertical;
        }
        .feedback-card .star-rating {
            display: flex;
            flex-direction: row-reverse;
            justify-content: flex-end;
            gap: 0.2rem;
        }
        .feedback-card .star-rating input {
            display: none;
        }
        .feedback-card .star-rating label {
            font-size: 1.6rem;
            color: #d0dae8;
            cursor: pointer;
            transition: color 0.2s, transform 0.1s;
        }
        .feedback-card .star-rating label:hover,
        .feedback-card .star-rating label:hover~label,
        .feedback-card .star-rating input:checked~label {
            color: #f5a623;
        }
        .feedback-card .star-rating label:hover {
            transform: scale(1.15);
        }
        .feedback-card .btn-submit {
            background: #1a3a5c;
            color: #fff;
            border: none;
            padding: 0.7rem 1.8rem;
            border-radius: 60px;
            font-weight: 600;
            font-size: 0.95rem;
            cursor: pointer;
            transition: background 0.25s, transform 0.1s;
            align-self: flex-start;
            font-family: inherit;
        }
        .feedback-card .btn-submit:hover {
            background: #f5a623;
            color: #0b1a2a;
        }
        .feedback-card .btn-submit:active {
            transform: scale(0.96);
        }
        .feedback-card small {
            color: #7a9abb;
            font-size: 0.8rem;
        }
        .data-table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.2rem 0 1.8rem;
            font-size: 0.95rem;
            border-radius: 12px;
            overflow: hidden;
        }
        .data-table th {
            background: #1a3a5c;
            color: #fff;
            font-weight: 600;
            padding: 0.8rem 1rem;
            text-align: left;
        }
        .data-table td {
            padding: 0.7rem 1rem;
            border-bottom: 1px solid #e6edf4;
            background: #fafcff;
        }
        .data-table tr:last-child td {
            border-bottom: none;
        }
        .data-table tr:hover td {
            background: #fef7e9;
        }
        friend-link {
            display: block;
            margin: 2rem 0 1rem;
            padding: 1.4rem 1.8rem;
            background: #f0f4fa;
            border-radius: 18px;
            border: 1px solid #dce5ef;
        }
        friend-link::before {
            content: "🔗 Friends & Related Links";
            display: block;
            font-weight: 700;
            font-size: 1.1rem;
            color: #0b1a2a;
            margin-bottom: 0.8rem;
        }
        friend-link a {
            display: inline-block;
            margin: 0.2rem 1.2rem 0.4rem 0;
            font-weight: 500;
            padding: 0.2rem 0;
        }
        friend-link a::before {
            content: "• ";
            color: #f5a623;
            font-weight: 700;
        }
        footer {
            padding: 1.6rem 0 2.2rem;
            border-top: 2px solid #e6edf4;
            margin-top: 1.8rem;
            text-align: center;
            font-size: 0.9rem;
            color: #5a7a9a;
        }
        footer .copyright {
            font-weight: 500;
            margin-top: 0.6rem;
        }
        footer .copyright span {
            color: #1e2a3a;
        }
        @media (max-width: 820px) {
            .feedback-section {
                grid-template-columns: 1fr;
                gap: 1.2rem;
            }
            .container {
                padding: 1.2rem 1rem;
            }
            h1 {
                font-size: 1.7rem;
            }
            h2 {
                font-size: 1.35rem;
            }
            .my-logo {
                font-size: 1.5rem;
            }
            header {
                padding-bottom: 0.4rem;
            }
        }
        @media (max-width: 680px) {
            .nav-toggle {
                display: block;
            }
            nav {
                display: none;
                flex-direction: column;
                width: 100%;
                padding: 0.8rem 0 0.4rem;
                gap: 0.2rem;
                border-top: 1px solid #e6edf4;
                margin-top: 0.6rem;
            }
            nav.open {
                display: flex;
            }
            nav a {
                padding: 0.5rem 0.2rem;
                border-bottom: none;
                border-left: 3px solid transparent;
                padding-left: 0.6rem;
            }
            nav a:hover {
                border-left-color: #f5a623;
                border-bottom: none;
            }
            .breadcrumb {
                font-size: 0.75rem;
            }
            .search-box {
                max-width: 100%;
                padding-left: 1rem;
            }
            .search-box input {
                font-size: 0.9rem;
                min-width: 80px;
            }
            .search-box button {
                padding: 0.5rem 1rem;
                font-size: 0.8rem;
            }
            .data-table {
                font-size: 0.82rem;
            }
            .data-table th,
            .data-table td {
                padding: 0.5rem 0.6rem;
            }
            friend-link {
                padding: 1rem;
            }
            friend-link a {
                display: block;
                margin: 0.2rem 0;
            }
        }
        @media (max-width: 440px) {
            body {
                padding: 0 0.5rem;
            }
            .container {
                padding: 0.8rem 0.7rem;
            }
            h1 {
                font-size: 1.4rem;
            }
            h2 {
                font-size: 1.15rem;
                padding-left: 0.6rem;
            }
            .feedback-card {
                padding: 1rem;
            }
        }
        .fade-up {
            opacity: 0;
            transform: translateY(18px);
            animation: fadeUp 0.6s ease forwards;
        }
        @keyframes fadeUp {
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .toc {
            background: #f8fafd;
            border-radius: 16px;
            padding: 1rem 1.6rem;
            border: 1px solid #e6edf4;
            margin: 1.2rem 0 1.8rem;
        }
        .toc summary {
            font-weight: 700;
            font-size: 1.1rem;
            cursor: pointer;
            padding: 0.2rem 0;
        }
        .toc ul {
            margin: 0.6rem 0 0 1.2rem;
        }
        .toc li {
            margin-bottom: 0.2rem;
        }
        .toc a {
            color: #1e2a3a;
        }
        .toc a:hover {
            color: #f5a623;
        }
        .quote-block {
            background: #fef7e9;
            border-left: 5px solid #f5a623;
            padding: 1rem 1.4rem;
            border-radius: 0 12px 12px 0;
            margin: 1.2rem 0;
            font-style: italic;
        }
        .quote-block cite {
            display: block;
            margin-top: 0.5rem;
            font-style: normal;
            font-weight: 600;
            color: #1a3a5c;
        }
        .grid-2 {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1.4rem;
            margin: 1.2rem 0;
        }
        @media (max-width: 640px) {
            .grid-2 {
                grid-template-columns: 1fr;
            }
        }
        .stat-row {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem 2rem;
            justify-content: center;
            margin: 1.2rem 0;
        }
        .stat-item {
            background: #f0f4fa;
            border-radius: 16px;
            padding: 1rem 1.8rem;
            text-align: center;
            flex: 1 1 140px;
            border: 1px solid #dce5ef;
        }
        .stat-item .num {
            font-size: 2rem;
            font-weight: 800;
            color: #1a3a5c;
            display: block;
        }
        .stat-item .label {
            font-size: 0.85rem;
            color: #5a7a9a;
            font-weight: 500;
        }
        .schema-hidden {
            display: none;
        }