*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            background: #f4f7fb;
            color: #1e2a3a;
            line-height: 1.7;
            padding: 0 1rem;
        }
        a {
            color: #1a6ea8;
            text-decoration: none;
            transition: color 0.2s ease;
        }
        a:hover,
        a:focus {
            color: #0d3b5e;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 8px;
        }
        ul,
        ol {
            padding-left: 1.5rem;
            margin: 1rem 0;
        }
        li {
            margin-bottom: 0.4rem;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 600;
            line-height: 1.3;
            color: #0b1c2e;
            margin-top: 2rem;
            margin-bottom: 0.8rem;
        }
        h1 {
            font-size: 2.4rem;
            border-bottom: 3px solid #2d7fc1;
            padding-bottom: 0.5rem;
        }
        h2 {
            font-size: 1.8rem;
            border-left: 4px solid #2d7fc1;
            padding-left: 0.75rem;
            margin-top: 2.8rem;
        }
        h3 {
            font-size: 1.35rem;
            color: #1a4a6e;
        }
        h4 {
            font-size: 1.1rem;
            color: #2a5a7a;
        }
        p {
            margin: 1rem 0;
            font-size: 1.05rem;
        }
        hr {
            border: none;
            border-top: 1px solid #d0dce8;
            margin: 2.5rem 0;
        }
        strong,
        b {
            font-weight: 700;
            color: #0b1c2e;
        }
        blockquote {
            border-left: 4px solid #2d7fc1;
            background: #e9f0f9;
            padding: 1rem 1.5rem;
            margin: 1.5rem 0;
            border-radius: 0 8px 8px 0;
            font-style: italic;
            color: #1a3a4e;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            background: #ffffff;
            border-radius: 16px;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.06);
            padding: 1.5rem 2rem 3rem;
        }
        @media (max-width: 768px) {
            body {
                padding: 0 0.5rem;
            }
            .container {
                padding: 1rem 1rem 2rem;
                border-radius: 0;
            }
            h1 {
                font-size: 1.7rem;
            }
            h2 {
                font-size: 1.4rem;
            }
            h3 {
                font-size: 1.15rem;
            }
            p {
                font-size: 0.98rem;
            }
        }
        .site-header {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            padding: 1rem 0 0.8rem;
            border-bottom: 2px solid #e2ebf3;
            margin-bottom: 1.2rem;
            position: relative;
        }
        .my-logo {
            font-size: 1.9rem;
            font-weight: 700;
            color: #0b1c2e;
            letter-spacing: -0.5px;
            background: linear-gradient(145deg, #1a6ea8, #0d3b5e);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
        }
        .my-logo:hover {
            text-decoration: none;
            opacity: 0.85;
        }
        .my-logo small {
            font-size: 0.7rem;
            font-weight: 400;
            color: #4a6a8a;
            -webkit-text-fill-color: #4a6a8a;
            background: none;
            letter-spacing: 0.3px;
        }
        @media (max-width: 480px) {
            .my-logo {
                font-size: 1.4rem;
            }
            .my-logo small {
                font-size: 0.6rem;
            }
        }
        .nav-wrapper {
            display: flex;
            align-items: center;
            gap: 0.8rem;
        }
        .nav-list {
            list-style: none;
            display: flex;
            gap: 1.2rem;
            margin: 0;
            padding: 0;
        }
        .nav-list li a {
            font-weight: 500;
            font-size: 0.95rem;
            padding: 0.4rem 0.2rem;
            color: #1e3a5a;
            border-bottom: 2px solid transparent;
            transition: border-color 0.2s, color 0.2s;
        }
        .nav-list li a:hover,
        .nav-list li a:focus {
            border-bottom-color: #2d7fc1;
            color: #0b1c2e;
            text-decoration: none;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 1.8rem;
            cursor: pointer;
            color: #1e3a5a;
            padding: 0.2rem 0.4rem;
            line-height: 1;
            transition: color 0.2s;
        }
        .hamburger:hover {
            color: #0b1c2e;
        }
        #nav-toggle {
            display: none;
        }
        @media (max-width: 768px) {
            .hamburger {
                display: inline-block;
            }
            .nav-list {
                display: none;
                flex-direction: column;
                width: 100%;
                gap: 0.3rem;
                padding: 1rem 0 0.5rem;
                border-top: 1px solid #dce6f0;
                margin-top: 0.8rem;
            }
            .nav-list li a {
                display: block;
                padding: 0.6rem 0.8rem;
                border-radius: 6px;
                background: #f4f9ff;
                border-bottom: none;
            }
            .nav-list li a:hover {
                background: #e2ebf3;
                border-bottom: none;
            }
            #nav-toggle:checked~.nav-list {
                display: flex;
            }
            .nav-wrapper {
                flex-wrap: wrap;
            }
        }
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            padding: 0.6rem 0;
            margin: 0 0 1.2rem;
            font-size: 0.88rem;
            color: #4a6a8a;
            border-bottom: 1px solid #e6edf5;
        }
        .breadcrumb li+li::before {
            content: "›";
            padding: 0 0.6rem;
            color: #8aa3b8;
            font-weight: 700;
        }
        .breadcrumb a {
            color: #1a6ea8;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .breadcrumb li:last-child {
            color: #2a4a6a;
            font-weight: 500;
        }
        .search-form {
            display: flex;
            flex-wrap: wrap;
            gap: 0.6rem;
            margin: 1.8rem 0 2rem;
            padding: 1.2rem 1.5rem;
            background: #e9f0f9;
            border-radius: 12px;
            align-items: center;
        }
        .search-form label {
            font-weight: 600;
            color: #1a3a5a;
            font-size: 1rem;
        }
        .search-form input[type="text"] {
            flex: 1;
            min-width: 180px;
            padding: 0.7rem 1rem;
            border: 1px solid #c4d4e4;
            border-radius: 8px;
            font-size: 0.98rem;
            background: #fff;
            transition: border-color 0.2s;
        }
        .search-form input[type="text"]:focus {
            border-color: #2d7fc1;
            outline: none;
            box-shadow: 0 0 0 3px rgba(45, 127, 193, 0.15);
        }
        .search-form button {
            padding: 0.7rem 1.6rem;
            background: #1a6ea8;
            color: #fff;
            border: none;
            border-radius: 8px;
            font-weight: 600;
            font-size: 0.98rem;
            cursor: pointer;
            transition: background 0.2s, transform 0.1s;
        }
        .search-form button:hover {
            background: #0d4a78;
            transform: translateY(-1px);
        }
        .search-form button:active {
            transform: translateY(1px);
        }
        @media (max-width: 480px) {
            .search-form {
                padding: 1rem;
            }
            .search-form input[type="text"] {
                min-width: 120px;
            }
        }
        .featured-image {
            margin: 2rem 0;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 4px 14px rgba(0, 0, 0, 0.08);
            background: #e2ebf3;
        }
        .featured-image img {
            width: 100%;
            max-height: 480px;
            object-fit: cover;
        }
        .featured-image figcaption {
            padding: 0.7rem 1.2rem;
            font-size: 0.9rem;
            color: #3a5a7a;
            background: #f4f9ff;
            border-top: 1px solid #dce6f0;
        }
        .interaction-panel {
            display: flex;
            flex-wrap: wrap;
            gap: 2rem;
            margin: 3rem 0 2rem;
            padding: 1.8rem 2rem;
            background: #f4f9ff;
            border-radius: 14px;
            border: 1px solid #dce6f0;
        }
        .comment-section,
        .score-section {
            flex: 1 1 260px;
        }
        .comment-section h3,
        .score-section h3 {
            margin-top: 0;
            font-size: 1.2rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .comment-section form,
        .score-section form {
            display: flex;
            flex-direction: column;
            gap: 0.8rem;
            margin-top: 0.6rem;
        }
        .comment-section textarea {
            width: 100%;
            min-height: 90px;
            padding: 0.7rem 1rem;
            border: 1px solid #c4d4e4;
            border-radius: 8px;
            font-size: 0.95rem;
            font-family: inherit;
            resize: vertical;
            background: #fff;
            transition: border-color 0.2s;
        }
        .comment-section textarea:focus {
            border-color: #2d7fc1;
            outline: none;
            box-shadow: 0 0 0 3px rgba(45, 127, 193, 0.12);
        }
        .comment-section input[type="text"] {
            padding: 0.6rem 1rem;
            border: 1px solid #c4d4e4;
            border-radius: 8px;
            font-size: 0.95rem;
            background: #fff;
        }
        .comment-section input[type="text"]:focus {
            border-color: #2d7fc1;
            outline: none;
            box-shadow: 0 0 0 3px rgba(45, 127, 193, 0.12);
        }
        .score-section select {
            padding: 0.6rem 1rem;
            border: 1px solid #c4d4e4;
            border-radius: 8px;
            font-size: 0.95rem;
            background: #fff;
            cursor: pointer;
        }
        .interaction-panel button {
            padding: 0.6rem 1.4rem;
            background: #1a6ea8;
            color: #fff;
            border: none;
            border-radius: 8px;
            font-weight: 600;
            font-size: 0.92rem;
            cursor: pointer;
            transition: background 0.2s, transform 0.1s;
            align-self: flex-start;
        }
        .interaction-panel button:hover {
            background: #0d4a78;
            transform: translateY(-1px);
        }
        .interaction-panel button:active {
            transform: translateY(1px);
        }
        @media (max-width: 600px) {
            .interaction-panel {
                padding: 1.2rem 1rem;
                gap: 1.5rem;
            }
        }
        friend-link {
            display: block;
            padding: 1.5rem 0 0.8rem;
            border-top: 2px solid #e2ebf3;
            margin-top: 2rem;
            font-size: 0.95rem;
        }
        friend-link a {
            display: inline-block;
            margin: 0.3rem 1.2rem 0.3rem 0;
            padding: 0.2rem 0;
            color: #1a6ea8;
            font-weight: 500;
        }
        friend-link a:hover {
            color: #0d3b5e;
        }
        .site-footer {
            padding: 1.8rem 0 1rem;
            border-top: 1px solid #dce6f0;
            margin-top: 2.5rem;
            font-size: 0.9rem;
            color: #4a6a8a;
            text-align: center;
        }
        .site-footer .copyright {
            font-weight: 500;
            color: #2a4a6a;
        }
        .site-footer .copyright small {
            font-weight: 400;
            color: #6a8aaa;
        }
        @media (max-width: 480px) {
            .hide-mobile {
                display: none !important;
            }
            .featured-image img {
                max-height: 220px;
            }
        }
        .last-updated {
            font-size: 0.88rem;
            color: #5a7a9a;
            text-align: right;
            margin: 0.5rem 0 1rem;
            font-style: italic;
        }
        .data-table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.5rem 0;
            font-size: 0.95rem;
            border-radius: 8px;
            overflow: hidden;
            box-shadow: 0 1px 6px rgba(0, 0, 0, 0.05);
        }
        .data-table th {
            background: #1a3a5a;
            color: #fff;
            padding: 0.7rem 1rem;
            text-align: left;
            font-weight: 600;
        }
        .data-table td {
            padding: 0.6rem 1rem;
            border-bottom: 1px solid #e2ebf3;
            background: #fafdff;
        }
        .data-table tr:last-child td {
            border-bottom: none;
        }
        .data-table tr:hover td {
            background: #f0f6fd;
        }
        @media (max-width: 600px) {
            .data-table {
                font-size: 0.82rem;
            }
            .data-table th,
            .data-table td {
                padding: 0.4rem 0.6rem;
            }
        }
        .toc {
            background: #f4f9ff;
            border: 1px solid #dce6f0;
            border-radius: 12px;
            padding: 1.2rem 1.8rem;
            margin: 1.8rem 0;
        }
        .toc summary {
            font-weight: 700;
            font-size: 1.1rem;
            cursor: pointer;
            color: #0b1c2e;
            padding: 0.2rem 0;
        }
        .toc ol {
            margin: 0.8rem 0 0.2rem;
            padding-left: 1.2rem;
        }
        .toc ol li {
            margin-bottom: 0.3rem;
        }
        .toc ol li a {
            color: #1a6ea8;
        }
        .toc ol li a:hover {
            text-decoration: underline;
        }