*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: 'Segoe UI', Roboto, system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
            background: #f8f5f0;
            color: #2c2416;
            line-height: 1.7;
            font-size: 1.0625rem;
        }
        a {
            color: #b8860b;
            text-decoration: none;
            transition: color .25s, background .25s;
        }
        a:hover,
        a:focus {
            color: #6b4c1a;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 8px;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.25;
            margin-bottom: 0.5em;
            color: #1a130c;
        }
        h1 {
            font-size: 2.4rem;
            letter-spacing: -0.01em;
        }
        h2 {
            font-size: 1.9rem;
            border-left: 5px solid #b8860b;
            padding-left: 0.75rem;
            margin-top: 2.2rem;
        }
        h3 {
            font-size: 1.45rem;
            margin-top: 1.8rem;
            color: #3d2e1b;
        }
        h4 {
            font-size: 1.2rem;
            margin-top: 1.2rem;
            color: #5a4628;
        }
        p {
            margin-bottom: 1.2rem;
        }
        ul,
        ol {
            margin-bottom: 1.2rem;
            padding-left: 1.8rem;
        }
        li {
            margin-bottom: 0.4rem;
        }
        hr {
            border: none;
            border-top: 2px solid #e6dccf;
            margin: 2.5rem 0;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .badge {
            display: inline-block;
            background: #b8860b;
            color: #fff;
            font-size: 0.75rem;
            font-weight: 600;
            padding: 0.2em 0.8em;
            border-radius: 20px;
            letter-spacing: 0.03em;
        }
        .site-header {
            background: linear-gradient(145deg, #1a130c 0%, #2c2416 100%);
            padding: 0.8rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 2rem;
            font-weight: 800;
            color: #f0e6d3;
            letter-spacing: 0.05em;
            transition: opacity .3s;
            text-decoration: none !important;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .my-logo span {
            color: #b8860b;
        }
        .my-logo i {
            font-size: 1.8rem;
            color: #d4af37;
        }
        .my-logo:hover {
            opacity: 0.85;
            text-decoration: none;
        }
        .nav-list {
            display: flex;
            list-style: none;
            gap: 0.3rem;
            flex-wrap: wrap;
            padding-left: 0;
        }
        .nav-list li a {
            color: #e6dccf;
            padding: 0.5rem 1rem;
            border-radius: 6px;
            font-weight: 500;
            font-size: 0.95rem;
            transition: background .3s, color .3s;
            text-decoration: none;
            display: block;
        }
        .nav-list li a:hover,
        .nav-list li a:focus {
            background: #b8860b22;
            color: #d4af37;
            text-decoration: none;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: 2px solid #b8860b;
            color: #f0e6d3;
            font-size: 1.6rem;
            padding: 0.3rem 0.7rem;
            border-radius: 6px;
            cursor: pointer;
            transition: background .3s;
        }
        .nav-toggle:hover {
            background: #b8860b33;
        }
        .breadcrumb {
            background: #ede7dd;
            padding: 0.6rem 0;
            font-size: 0.9rem;
        }
        .breadcrumb ul {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 0.3rem 0.6rem;
            padding-left: 0;
            margin-bottom: 0;
        }
        .breadcrumb ul li+li::before {
            content: "›";
            margin-right: 0.4rem;
            color: #8a7a66;
            font-weight: 700;
        }
        .breadcrumb a {
            color: #5a4628;
        }
        .breadcrumb .current {
            color: #2c2416;
            font-weight: 600;
        }
        .hero {
            background: linear-gradient(135deg, #2c2416 0%, #4a3824 100%);
            color: #f8f5f0;
            padding: 3rem 0 2.5rem;
            text-align: center;
            border-bottom: 4px solid #b8860b;
        }
        .hero h1 {
            color: #f0e6d3;
            font-size: 2.8rem;
            margin-bottom: 0.3rem;
        }
        .hero p {
            font-size: 1.2rem;
            max-width: 720px;
            margin: 0.6rem auto 0;
            color: #d9cebd;
        }
        .content-area {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2.5rem;
            padding: 2.5rem 0;
        }
        .content-area .main-column {
            min-width: 0;
        }
        .content-area .side-column {
            position: sticky;
            top: 100px;
            align-self: start;
        }
        @media (max-width: 920px) {
            .content-area {
                grid-template-columns: 1fr;
            }
            .content-area .side-column {
                position: static;
            }
        }
        .puzzle-image-wrapper {
            margin: 1.8rem 0;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
            background: #ede7dd;
            padding: 8px;
        }
        .puzzle-image-wrapper img {
            border-radius: 6px;
            width: 100%;
            height: auto;
        }
        .fig-caption {
            text-align: center;
            font-size: 0.85rem;
            color: #6b5d4a;
            padding: 0.6rem 0 0.2rem;
            font-style: italic;
        }
        .sidebar-card {
            background: #fff;
            border-radius: 12px;
            padding: 1.5rem;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
            margin-bottom: 1.5rem;
            border: 1px solid #e6dccf;
        }
        .sidebar-card h3 {
            font-size: 1.2rem;
            margin-top: 0;
            border-bottom: 2px solid #b8860b;
            padding-bottom: 0.4rem;
        }
        .sidebar-card ul {
            list-style: none;
            padding-left: 0;
        }
        .sidebar-card ul li {
            padding: 0.4rem 0;
            border-bottom: 1px dashed #ede7dd;
        }
        .sidebar-card ul li a {
            font-weight: 500;
        }
        .form-block {
            background: #fff;
            border-radius: 12px;
            padding: 1.8rem;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
            border: 1px solid #e6dccf;
            margin: 2rem 0;
        }
        .form-block h3 {
            margin-top: 0;
        }
        .form-group {
            margin-bottom: 1.2rem;
        }
        .form-group label {
            display: block;
            font-weight: 600;
            margin-bottom: 0.3rem;
            color: #2c2416;
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 0.7rem 1rem;
            border: 2px solid #e6dccf;
            border-radius: 8px;
            font-family: inherit;
            font-size: 1rem;
            background: #faf8f5;
            transition: border-color .3s;
        }
        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            border-color: #b8860b;
            outline: none;
            background: #fff;
        }
        .form-group textarea {
            min-height: 100px;
            resize: vertical;
        }
        .btn {
            background: #b8860b;
            color: #fff;
            border: none;
            padding: 0.7rem 2rem;
            border-radius: 8px;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            transition: background .3s, transform .2s;
        }
        .btn:hover {
            background: #9a7209;
            transform: translateY(-1px);
        }
        .btn:active {
            transform: translateY(0);
        }
        .btn-outline {
            background: transparent;
            border: 2px solid #b8860b;
            color: #b8860b;
        }
        .btn-outline:hover {
            background: #b8860b;
            color: #fff;
        }
        .star-rating {
            display: flex;
            gap: 0.3rem;
            font-size: 1.8rem;
            color: #d4af37;
            cursor: pointer;
            flex-direction: row-reverse;
            justify-content: flex-end;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            transition: color .2s, transform .2s;
            cursor: pointer;
        }
        .star-rating label:hover,
        .star-rating label:hover~label,
        .star-rating input:checked~label {
            color: #b8860b;
            transform: scale(1.1);
        }
        .site-footer {
            background: #1a130c;
            color: #d9cebd;
            padding: 2.5rem 0 1.5rem;
            margin-top: 3rem;
            border-top: 4px solid #b8860b;
        }
        .site-footer a {
            color: #d4af37;
        }
        .site-footer a:hover {
            color: #f0e6d3;
        }
        friend-link {
            display: block;
            padding: 0.8rem 0;
        }
        friend-link ul {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 0.8rem 1.6rem;
            padding-left: 0;
            margin-bottom: 0;
        }
        friend-link ul li a {
            font-weight: 500;
        }
        .copyright {
            text-align: center;
            padding-top: 1.2rem;
            border-top: 1px solid #3d2e1b;
            font-size: 0.9rem;
            color: #8a7a66;
        }
        @media (max-width: 768px) {
            .nav-list {
                display: none;
                flex-direction: column;
                width: 100%;
                background: #1a130c;
                padding: 0.8rem 0;
                border-radius: 0 0 12px 12px;
                margin-top: 0.5rem;
            }
            .nav-list.open {
                display: flex;
            }
            .nav-toggle {
                display: block;
            }
            .header-inner {
                align-items: center;
            }
            h1 {
                font-size: 1.9rem;
            }
            h2 {
                font-size: 1.5rem;
            }
            .hero h1 {
                font-size: 2rem;
            }
            .hero p {
                font-size: 1rem;
            }
            .container {
                padding: 0 14px;
            }
            .form-block {
                padding: 1.2rem;
            }
            .star-rating {
                font-size: 1.5rem;
            }
            .my-logo {
                font-size: 1.5rem;
            }
        }
        @media (max-width: 480px) {
            body {
                font-size: 0.95rem;
            }
            .breadcrumb ul {
                font-size: 0.8rem;
            }
            .sidebar-card {
                padding: 1rem;
            }
            .btn {
                padding: 0.6rem 1.2rem;
                font-size: 0.9rem;
            }
        }
        .highlight {
            background: #fcf4e0;
            padding: 0.1em 0.3em;
            border-radius: 4px;
        }
        .tactic-box {
            background: #f0ebe4;
            border-left: 4px solid #b8860b;
            padding: 1.2rem 1.5rem;
            border-radius: 0 8px 8px 0;
            margin: 1.5rem 0;
        }
        .tactic-box strong {
            color: #6b4c1a;
        }
        .stat-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
            gap: 1rem;
            margin: 1.5rem 0;
        }
        .stat-card {
            background: #fff;
            border-radius: 10px;
            padding: 1.2rem;
            text-align: center;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
            border: 1px solid #ede7dd;
        }
        .stat-card .number {
            font-size: 2rem;
            font-weight: 800;
            color: #b8860b;
            display: block;
        }
        .stat-card .label {
            font-size: 0.85rem;
            color: #6b5d4a;
        }
        .interview-box {
            background: #ede7dd;
            border-radius: 12px;
            padding: 1.8rem;
            margin: 2rem 0;
            font-style: italic;
            border: 1px solid #d9cebd;
        }
        .interview-box .source {
            font-style: normal;
            font-weight: 600;
            text-align: right;
            margin-top: 0.8rem;
            color: #3d2e1b;
        }
        .puzzle-table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.5rem 0;
            font-size: 0.95rem;
            background: #fff;
            border-radius: 8px;
            overflow: hidden;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
        }
        .puzzle-table th {
            background: #2c2416;
            color: #f0e6d3;
            padding: 0.7rem 1rem;
            text-align: left;
            font-weight: 600;
        }
        .puzzle-table td {
            padding: 0.7rem 1rem;
            border-bottom: 1px solid #ede7dd;
        }
        .puzzle-table tr:last-child td {
            border-bottom: none;
        }
        .puzzle-table tr:hover td {
            background: #fcf9f4;
        }
        .scroll-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            background: #b8860b;
            color: #fff;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
            transition: background .3s, transform .3s;
            z-index: 999;
            border: none;
            cursor: pointer;
        }
        .scroll-top:hover {
            background: #6b4c1a;
            transform: translateY(-3px);
        }
        @media (max-width: 480px) {
            .scroll-top {
                bottom: 16px;
                right: 16px;
                width: 40px;
                height: 40px;
                font-size: 1.2rem;
            }
        }