*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            background: #0b0f1a;
            color: #e8edf5;
            line-height: 1.75;
            padding: 0 1rem;
            max-width: 1280px;
            margin: 0 auto;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        a {
            color: #6ecbf5;
            text-decoration: none;
            transition: color 0.25s;
        }
        a:hover,
        a:focus-visible {
            color: #f5c542;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 12px;
        }
        h1,
        h2,
        h3,
        h4 {
            font-weight: 700;
            letter-spacing: -0.02em;
            color: #f0f4fe;
            margin-top: 1.8em;
            margin-bottom: 0.5em;
            line-height: 1.2;
        }
        h1 {
            font-size: 2.4rem;
            border-left: 6px solid #f5c542;
            padding-left: 1rem;
        }
        h2 {
            font-size: 1.8rem;
            border-bottom: 2px solid #1f2a40;
            padding-bottom: 0.3rem;
        }
        h3 {
            font-size: 1.35rem;
        }
        h4 {
            font-size: 1.1rem;
            color: #b6c8e5;
        }
        p {
            margin-bottom: 1.2rem;
        }
        ul,
        ol {
            margin-bottom: 1.5rem;
            padding-left: 1.8rem;
        }
        li {
            margin-bottom: 0.4rem;
        }
        strong {
            color: #f5c542;
        }
        .site-header {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            padding: 1.2rem 0;
            border-bottom: 1px solid #1f2a40;
            position: relative;
        }
        .my-logo {
            font-size: 1.9rem;
            font-weight: 800;
            background: linear-gradient(135deg, #f5c542, #e89f3e);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: -0.03em;
            text-transform: uppercase;
        }
        .my-logo small {
            font-size: 0.7rem;
            font-weight: 400;
            display: block;
            -webkit-text-fill-color: #8899bb;
            color: #8899bb;
            letter-spacing: 0.1em;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: 2px solid #2a3a5a;
            color: #e8edf5;
            font-size: 1.6rem;
            padding: 0.3rem 0.8rem;
            border-radius: 8px;
            cursor: pointer;
            transition: 0.2s;
        }
        .nav-toggle:hover {
            border-color: #f5c542;
            color: #f5c542;
        }
        .navbar {
            display: flex;
            flex-wrap: wrap;
            gap: 0.4rem 1.2rem;
            align-items: center;
        }
        .navbar a {
            font-size: 0.95rem;
            font-weight: 500;
            padding: 0.3rem 0;
            color: #b6c8e5;
            border-bottom: 2px solid transparent;
            transition: 0.2s;
        }
        .navbar a:hover {
            border-bottom-color: #f5c542;
            color: #f5c542;
            text-decoration: none;
        }
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            gap: 0.4rem 0.8rem;
            padding: 0.9rem 0 0.3rem;
            font-size: 0.85rem;
            color: #6f84a8;
            list-style: none;
        }
        .breadcrumb li+li::before {
            content: "▸";
            margin-right: 0.6rem;
            color: #3e506e;
        }
        .breadcrumb a {
            color: #6f84a8;
        }
        .breadcrumb a:hover {
            color: #f5c542;
        }
        .breadcrumb .active {
            color: #e8edf5;
        }
        main {
            flex: 1;
            padding: 2rem 0 3rem;
        }
        .search-section {
            background: #131b2b;
            border-radius: 16px;
            padding: 1.8rem 2rem;
            margin: 2rem 0 2.5rem;
            display: flex;
            flex-wrap: wrap;
            gap: 0.8rem;
            align-items: center;
            border: 1px solid #1f2a40;
        }
        .search-section label {
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 0.5rem;
            color: #f5c542;
        }
        .search-section input[type="text"] {
            flex: 1 1 240px;
            padding: 0.7rem 1.2rem;
            border-radius: 40px;
            border: 1px solid #2a3a5a;
            background: #0b0f1a;
            color: #e8edf5;
            font-size: 0.95rem;
            outline: none;
            transition: 0.25s;
        }
        .search-section input[type="text"]:focus {
            border-color: #f5c542;
            box-shadow: 0 0 0 3px rgba(245, 197, 66, 0.2);
        }
        .search-section button {
            padding: 0.65rem 2rem;
            border-radius: 40px;
            border: none;
            background: #f5c542;
            color: #0b0f1a;
            font-weight: 700;
            font-size: 0.95rem;
            cursor: pointer;
            transition: 0.25s;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .search-section button:hover {
            background: #e8b83a;
            transform: scale(1.02);
        }
        .feedback-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1.8rem;
            margin: 2.5rem 0;
        }
        .feedback-card {
            background: #131b2b;
            border-radius: 16px;
            padding: 1.8rem 2rem;
            border: 1px solid #1f2a40;
        }
        .feedback-card h3 {
            margin-top: 0;
            display: flex;
            align-items: center;
            gap: 0.6rem;
            color: #f5c542;
        }
        .feedback-card textarea,
        .feedback-card input[type="number"],
        .feedback-card input[type="text"] {
            width: 100%;
            padding: 0.7rem 1rem;
            border-radius: 10px;
            border: 1px solid #2a3a5a;
            background: #0b0f1a;
            color: #e8edf5;
            font-size: 0.95rem;
            outline: none;
            transition: 0.25s;
            margin-bottom: 0.8rem;
            font-family: inherit;
        }
        .feedback-card textarea {
            min-height: 90px;
            resize: vertical;
        }
        .feedback-card textarea:focus,
        .feedback-card input:focus {
            border-color: #f5c542;
            box-shadow: 0 0 0 3px rgba(245, 197, 66, 0.15);
        }
        .feedback-card .star-group {
            display: flex;
            gap: 0.3rem;
            font-size: 1.6rem;
            color: #3e506e;
            cursor: pointer;
            margin-bottom: 0.8rem;
        }
        .feedback-card .star-group i {
            transition: 0.2s;
        }
        .feedback-card .star-group i.active,
        .feedback-card .star-group i:hover {
            color: #f5c542;
        }
        .feedback-card button {
            padding: 0.6rem 2rem;
            border-radius: 40px;
            border: none;
            background: #f5c542;
            color: #0b0f1a;
            font-weight: 700;
            font-size: 0.9rem;
            cursor: pointer;
            transition: 0.25s;
        }
        .feedback-card button:hover {
            background: #e8b83a;
            transform: scale(1.02);
        }
        .featured-img {
            margin: 2rem 0;
            border-radius: 16px;
            overflow: hidden;
            background: #131b2b;
            padding: 0.5rem;
            border: 1px solid #1f2a40;
        }
        .featured-img figcaption {
            padding: 0.7rem 1rem 0.4rem;
            font-size: 0.85rem;
            color: #6f84a8;
            font-style: italic;
        }
        .last-updated {
            font-size: 0.85rem;
            color: #6f84a8;
            text-align: right;
            border-top: 1px solid #1f2a40;
            padding-top: 1rem;
            margin-top: 2rem;
        }
        .site-footer {
            border-top: 1px solid #1f2a40;
            padding: 2rem 0 1.5rem;
            margin-top: 2rem;
        }
        friend-link {
            display: block;
            padding: 1.2rem 0 0.8rem;
            font-weight: 600;
            color: #b6c8e5;
        }
        friend-link a {
            display: inline-block;
            margin: 0.3rem 1.5rem 0.3rem 0;
            font-weight: 400;
            font-size: 0.95rem;
        }
        .copyright {
            font-size: 0.85rem;
            color: #4a5a7a;
            padding-top: 1rem;
            border-top: 1px solid #131b2b;
            margin-top: 0.8rem;
            text-align: center;
        }
        .copyright strong {
            color: #6f84a8;
        }
        @media (max-width: 768px) {
            body {
                padding: 0 0.8rem;
            }
            h1 {
                font-size: 1.8rem;
            }
            h2 {
                font-size: 1.4rem;
            }
            h3 {
                font-size: 1.15rem;
            }
            .site-header {
                padding: 0.8rem 0;
            }
            .nav-toggle {
                display: inline-block;
            }
            .navbar {
                display: none;
                width: 100%;
                flex-direction: column;
                align-items: flex-start;
                padding: 1rem 0 0.4rem;
                gap: 0.2rem;
            }
            .navbar.open {
                display: flex;
            }
            .feedback-grid {
                grid-template-columns: 1fr;
                gap: 1.2rem;
            }
            .search-section {
                flex-direction: column;
                align-items: stretch;
                padding: 1.2rem;
            }
            .search-section input[type="text"] {
                flex: 1 1 auto;
            }
            .my-logo {
                font-size: 1.5rem;
            }
            .breadcrumb {
                font-size: 0.75rem;
            }
        }
        @media (min-width: 769px) {
            .navbar {
                display: flex !important;
            }
        }
        .highlight-box {
            background: linear-gradient(145deg, #182237, #0f1728);
            border-left: 4px solid #f5c542;
            padding: 1.5rem 2rem;
            border-radius: 12px;
            margin: 1.8rem 0;
        }
        .stat-badge {
            display: inline-block;
            background: #1f2a40;
            padding: 0.2rem 1rem;
            border-radius: 40px;
            font-size: 0.8rem;
            color: #b6c8e5;
            font-weight: 600;
        }
        .emoji-lg {
            font-size: 1.3rem;
        }
        .grid-2col {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1.5rem;
            margin: 1.5rem 0;
        }
        @media (max-width: 640px) {
            .grid-2col {
                grid-template-columns: 1fr;
            }
        }
        .toc {
            background: #0f1728;
            border-radius: 12px;
            padding: 1.5rem 2rem;
            margin: 2rem 0;
            border: 1px solid #1f2a40;
        }
        .toc ol {
            margin-bottom: 0;
            columns: 2;
            column-gap: 2rem;
        }
        .toc li {
            break-inside: avoid;
        }
        @media (max-width: 600px) {
            .toc ol {
                columns: 1;
            }
        }
        .interview-block {
            background: #131b2b;
            border-radius: 16px;
            padding: 1.5rem 2rem;
            margin: 2rem 0;
            border: 1px solid #2a3a5a;
        }
        .interview-block q {
            font-style: italic;
            color: #c4d4f0;
            quotes: "“" "”" "‘" "’";
            display: block;
            padding: 0.5rem 1rem;
            border-left: 3px solid #f5c542;
            margin: 0.8rem 0;
        }
        .btn-top {
            position: fixed;
            bottom: 2rem;
            right: 2rem;
            background: #f5c542;
            color: #0b0f1a;
            border: none;
            border-radius: 50%;
            width: 48px;
            height: 48px;
            font-size: 1.4rem;
            cursor: pointer;
            box-shadow: 0 4px 20px rgba(245, 197, 66, 0.3);
            transition: 0.25s;
            display: flex;
            align-items: center;
            justify-content: center;
            z-index: 999;
        }
        .btn-top:hover {
            transform: translateY(-4px);
            box-shadow: 0 8px 30px rgba(245, 197, 66, 0.4);
        }
        @media (max-width: 600px) {
            .btn-top {
                bottom: 1.2rem;
                right: 1.2rem;
                width: 42px;
                height: 42px;
                font-size: 1.2rem;
            }
        }
        .hidden-schema {
            display: none;
        }