* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: 'Segoe UI', Roboto, system-ui, -apple-system, sans-serif;
            background: #faf9f6;
            color: #1e2a2f;
            line-height: 1.7;
            padding: 0 1rem;
        }
        a {
            color: #b87333;
            text-decoration: none;
            transition: color 0.2s;
        }
        a:hover {
            color: #8b5a2b;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 12px;
        }
        ul,
        ol {
            padding-left: 1.6rem;
        }
        li {
            margin-bottom: 0.4rem;
        }
        .container {
            max-width: 1120px;
            margin: 0 auto;
            padding: 0 0.5rem;
        }
        header {
            background: linear-gradient(135deg, #1e3a2f 0%, #2a5a44 100%);
            color: #f5efe6;
            padding: 1rem 0;
            border-radius: 0 0 20px 20px;
            margin-bottom: 1.2rem;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
            position: relative;
            z-index: 10;
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            padding: 0 1rem;
        }
        .my-logo {
            font-size: 2rem;
            font-weight: 800;
            letter-spacing: 2px;
            color: #f5e6c8;
            text-shadow: 2px 2px 0 #8b5a2b;
            transition: transform 0.2s;
        }
        .my-logo:hover {
            transform: scale(1.02);
            text-decoration: none;
            color: #f5e6c8;
        }
        .my-logo span {
            color: #e6b17e;
        }
        nav {
            display: flex;
            align-items: center;
            gap: 0.2rem;
            flex-wrap: wrap;
        }
        nav a {
            color: #f5efe6;
            padding: 0.45rem 0.9rem;
            border-radius: 30px;
            font-weight: 500;
            font-size: 0.92rem;
            transition: background 0.2s, color 0.2s;
        }
        nav a:hover {
            background: rgba(245, 239, 230, 0.2);
            color: #e6b17e;
            text-decoration: none;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: #f5efe6;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 0.2rem 0.6rem;
            border-radius: 8px;
            transition: background 0.2s;
        }
        .hamburger:hover {
            background: rgba(255, 255, 255, 0.1);
        }
        .nav-links {
            display: flex;
            gap: 0.2rem;
            flex-wrap: wrap;
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
            .nav-links {
                display: none;
                flex-direction: column;
                width: 100%;
                margin-top: 0.8rem;
                background: rgba(30, 58, 47, 0.95);
                padding: 0.8rem;
                border-radius: 16px;
                gap: 0.3rem;
            }
            .nav-links.open {
                display: flex;
            }
            .nav-links a {
                padding: 0.6rem 1rem;
                border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            }
        }
        .breadcrumb {
            padding: 0.6rem 0 0.2rem 0;
            font-size: 0.85rem;
            color: #6b7a7a;
            display: flex;
            flex-wrap: wrap;
            gap: 0.3rem 0.6rem;
        }
        .breadcrumb a {
            color: #b87333;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .breadcrumb span {
            color: #8f9e9e;
        }
        main {
            background: #ffffff;
            border-radius: 24px;
            padding: 2rem 1.8rem;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.06);
            margin-bottom: 2rem;
        }
        h1 {
            font-size: 2.6rem;
            font-weight: 800;
            color: #1e3a2f;
            line-height: 1.2;
            margin-bottom: 0.5rem;
            border-left: 6px solid #b87333;
            padding-left: 1.2rem;
        }
        h2 {
            font-size: 1.9rem;
            font-weight: 700;
            color: #1e3a2f;
            margin-top: 2.8rem;
            margin-bottom: 1rem;
            border-bottom: 2px solid #e8ddd0;
            padding-bottom: 0.4rem;
        }
        h3 {
            font-size: 1.4rem;
            font-weight: 600;
            color: #2a5a44;
            margin-top: 1.8rem;
            margin-bottom: 0.6rem;
        }
        h4 {
            font-size: 1.15rem;
            font-weight: 600;
            color: #3b6f56;
            margin-top: 1.2rem;
            margin-bottom: 0.4rem;
        }
        p {
            margin-bottom: 1.2rem;
            color: #2d3f3f;
        }
        .meta-info {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem 2rem;
            font-size: 0.9rem;
            color: #6b7a7a;
            margin-bottom: 1.8rem;
            padding: 0.6rem 0 0.8rem 0;
            border-bottom: 1px solid #eee5dc;
        }
        .meta-info i {
            margin-right: 0.4rem;
            color: #b87333;
        }
        .featured-image {
            margin: 1.8rem 0 2.2rem 0;
            border-radius: 16px;
            overflow: hidden;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
        }
        .featured-image img {
            width: 100%;
            max-height: 480px;
            object-fit: cover;
        }
        .featured-image figcaption {
            padding: 0.6rem 1rem;
            font-size: 0.85rem;
            color: #6b7a7a;
            background: #f8f4ef;
            font-style: italic;
        }
        .search-box {
            background: #f5f1eb;
            border-radius: 60px;
            padding: 0.3rem 0.3rem 0.3rem 1.5rem;
            display: flex;
            align-items: center;
            max-width: 480px;
            margin: 1.4rem 0 2rem 0;
            border: 1px solid #ddd5c8;
            transition: box-shadow 0.2s;
        }
        .search-box:focus-within {
            box-shadow: 0 0 0 3px rgba(184, 115, 51, 0.2);
            border-color: #b87333;
        }
        .search-box input {
            flex: 1;
            border: none;
            background: transparent;
            padding: 0.7rem 0;
            font-size: 0.95rem;
            outline: none;
            color: #1e2a2f;
        }
        .search-box button {
            background: #b87333;
            border: none;
            color: white;
            padding: 0.6rem 1.4rem;
            border-radius: 40px;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.2s;
            font-size: 0.9rem;
        }
        .search-box button:hover {
            background: #9e642a;
        }
        .chess-table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.2rem 0 1.8rem 0;
            font-size: 0.95rem;
            background: #fcfaf7;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
        }
        .chess-table th {
            background: #1e3a2f;
            color: #f5efe6;
            padding: 0.8rem 1rem;
            text-align: left;
            font-weight: 600;
        }
        .chess-table td {
            padding: 0.7rem 1rem;
            border-bottom: 1px solid #ece3d8;
        }
        .chess-table tr:last-child td {
            border-bottom: none;
        }
        .chess-table tr:hover td {
            background: #f6f0e8;
        }
        .interaction-area {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1.8rem;
            margin: 2.8rem 0 1.2rem 0;
            padding: 1.8rem;
            background: #f8f5f0;
            border-radius: 20px;
            border: 1px solid #e8ddd0;
        }
        .interaction-area h3 {
            margin-top: 0;
            color: #1e3a2f;
            font-size: 1.3rem;
        }
        .interaction-area form {
            display: flex;
            flex-direction: column;
            gap: 0.8rem;
        }
        .interaction-area form input,
        .interaction-area form textarea,
        .interaction-area form select {
            padding: 0.7rem 1rem;
            border: 1px solid #d5cbbe;
            border-radius: 10px;
            font-size: 0.95rem;
            background: white;
            transition: border 0.2s;
            outline: none;
            font-family: inherit;
        }
        .interaction-area form input:focus,
        .interaction-area form textarea:focus,
        .interaction-area form select:focus {
            border-color: #b87333;
            box-shadow: 0 0 0 3px rgba(184, 115, 51, 0.12);
        }
        .interaction-area form textarea {
            min-height: 80px;
            resize: vertical;
        }
        .interaction-area form button {
            background: #b87333;
            color: white;
            border: none;
            padding: 0.7rem 1.4rem;
            border-radius: 40px;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.2s;
            font-size: 0.95rem;
            align-self: flex-start;
        }
        .interaction-area form button:hover {
            background: #9e642a;
        }
        .score-group {
            display: flex;
            align-items: center;
            gap: 0.8rem;
            flex-wrap: wrap;
        }
        .score-group select {
            flex: 1;
            min-width: 80px;
        }
        @media (max-width: 680px) {
            .interaction-area {
                grid-template-columns: 1fr;
                gap: 2rem;
            }
        }
        friend-link {
            display: block;
            padding: 1.2rem 0 0.4rem 0;
            border-top: 2px solid #e8ddd0;
            margin-top: 0.8rem;
            font-size: 0.9rem;
        }
        friend-link a {
            display: inline-block;
            margin: 0.25rem 1rem 0.25rem 0;
            color: #b87333;
        }
        friend-link a:hover {
            text-decoration: underline;
        }
        footer {
            background: #1e3a2f;
            color: #d9cec0;
            padding: 1.8rem 1.2rem;
            border-radius: 20px 20px 0 0;
            text-align: center;
            font-size: 0.9rem;
        }
        footer a {
            color: #e6b17e;
        }
        footer a:hover {
            color: #f5e6c8;
        }
        footer .copyright {
            margin-top: 1rem;
            font-size: 0.82rem;
            color: #a8b8a8;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 1rem;
        }
        @media (max-width: 600px) {
            body {
                padding: 0 0.4rem;
            }
            main {
                padding: 1.2rem 0.8rem;
            }
            h1 {
                font-size: 1.8rem;
                padding-left: 0.8rem;
            }
            h2 {
                font-size: 1.4rem;
            }
            h3 {
                font-size: 1.15rem;
            }
            .my-logo {
                font-size: 1.5rem;
            }
            .meta-info {
                flex-direction: column;
                gap: 0.3rem;
            }
            .chess-table {
                font-size: 0.82rem;
            }
            .chess-table th,
            .chess-table td {
                padding: 0.4rem 0.5rem;
            }
        }
        @media (max-width: 420px) {
            .header-inner {
                flex-direction: column;
                align-items: stretch;
                gap: 0.4rem;
            }
            .hamburger {
                align-self: flex-end;
            }
            .search-box {
                max-width: 100%;
                flex-wrap: wrap;
                border-radius: 30px;
                padding: 0.3rem;
            }
            .search-box input {
                padding: 0.5rem 0.8rem;
                min-width: 120px;
            }
            .search-box button {
                padding: 0.5rem 1rem;
                font-size: 0.8rem;
            }
        }
        .highlight {
            background: #fcf2e4;
            padding: 0.1rem 0.4rem;
            border-radius: 6px;
            font-weight: 600;
        }
        .emoji-big {
            font-size: 1.4rem;
            margin-right: 0.3rem;
        }
        .tip-box {
            background: #eef6f0;
            border-left: 5px solid #b87333;
            padding: 1rem 1.4rem;
            border-radius: 12px;
            margin: 1.4rem 0;
        }
        .tip-box strong {
            color: #1e3a2f;
        }
        .grid-2 {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1.4rem;
            margin: 1.2rem 0;
        }
        @media (max-width: 600px) {
            .grid-2 {
                grid-template-columns: 1fr;
            }
        }
        .inline-icon {
            margin-right: 0.3rem;
            color: #b87333;
        }
        .schema-hidden {
            display: none;
        }