*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: 'Segoe UI', Roboto, system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
            background: #f8f6f0;
            color: #1e1e1e;
            line-height: 1.7;
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }
        a {
            color: #c44536;
            text-decoration: none;
            transition: color 0.2s;
        }
        a:hover,
        a:focus-visible {
            color: #8e2a1e;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 12px;
        }
        ul,
        ol {
            padding-left: 1.5rem;
        }
        li {
            margin-bottom: 0.4rem;
        }
        h1,
        h2,
        h3,
        h4 {
            line-height: 1.3;
            color: #1e2a2f;
            letter-spacing: -0.01em;
        }
        h1 {
            font-size: 2.4rem;
            margin: 0 0 0.6rem;
        }
        h2 {
            font-size: 1.8rem;
            margin: 2.2rem 0 1rem;
            border-bottom: 3px solid #e6d9c8;
            padding-bottom: 0.3rem;
        }
        h3 {
            font-size: 1.35rem;
            margin: 1.6rem 0 0.7rem;
        }
        h4 {
            font-size: 1.1rem;
            margin: 1.2rem 0 0.5rem;
        }
        p {
            margin-bottom: 1rem;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: #1e2a2f;
            color: #f8f6f0;
            padding: 0.6rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.15);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 0.6rem 1rem;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            color: #f8f6f0;
            letter-spacing: -0.03em;
            background: #c44536;
            padding: 0.2rem 1rem 0.2rem 1.2rem;
            border-radius: 0 30px 30px 0;
            display: inline-block;
            transition: background 0.25s;
            margin-left: -20px;
        }
        .my-logo:hover {
            background: #a63528;
            text-decoration: none;
            color: #fff;
        }
        .my-logo span {
            font-weight: 300;
            color: #f0d5c0;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            color: #f8f6f0;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 0.2rem 0.5rem;
        }
        .nav-menu {
            display: flex;
            gap: 0.2rem;
            flex-wrap: wrap;
            align-items: center;
        }
        .nav-menu a {
            color: #e6d9c8;
            padding: 0.4rem 0.9rem;
            border-radius: 30px;
            font-size: 0.9rem;
            font-weight: 500;
            transition: background 0.2s, color 0.2s;
            white-space: nowrap;
        }
        .nav-menu a:hover,
        .nav-menu a:focus-visible {
            background: #c44536;
            color: #fff;
            text-decoration: none;
        }
        .breadcrumb {
            background: #efe9e0;
            padding: 0.5rem 0;
            font-size: 0.88rem;
            border-bottom: 1px solid #ddd6ca;
        }
        .breadcrumb ol {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 0.3rem 0.6rem;
            padding-left: 0;
        }
        .breadcrumb li+li::before {
            content: "›";
            margin-right: 0.6rem;
            color: #8e7a6b;
            font-weight: 700;
        }
        .breadcrumb a {
            color: #6b5a4b;
        }
        .breadcrumb a:hover {
            color: #c44536;
        }
        .breadcrumb .current {
            color: #1e2a2f;
            font-weight: 600;
        }
        .hero {
            background: linear-gradient(145deg, #e6d9c8, #dacbb8);
            padding: 2.2rem 0 2.8rem;
            text-align: center;
            border-bottom: 4px solid #c44536;
        }
        .hero h1 {
            font-size: 2.8rem;
            color: #1e2a2f;
        }
        .hero .tagline {
            font-size: 1.15rem;
            color: #4d3e32;
            max-width: 720px;
            margin: 0.4rem auto 0;
        }
        .hero .update-badge {
            display: inline-block;
            margin-top: 1rem;
            background: #c44536;
            color: #fff;
            padding: 0.25rem 1.4rem;
            border-radius: 30px;
            font-size: 0.85rem;
            font-weight: 600;
        }
        .search-section {
            background: #fff;
            padding: 1.6rem 0;
            border-bottom: 1px solid #e6d9c8;
        }
        .search-form {
            display: flex;
            gap: 0.6rem;
            max-width: 560px;
            margin: 0 auto;
            flex-wrap: wrap;
            justify-content: center;
        }
        .search-form input[type="text"] {
            flex: 1 1 260px;
            padding: 0.7rem 1.2rem;
            border: 2px solid #d4c8b8;
            border-radius: 40px;
            font-size: 1rem;
            outline: none;
            transition: border 0.25s;
            background: #fbf9f6;
        }
        .search-form input[type="text"]:focus {
            border-color: #c44536;
        }
        .search-form button {
            background: #c44536;
            color: #fff;
            border: none;
            padding: 0.7rem 2rem;
            border-radius: 40px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.25s;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .search-form button:hover {
            background: #a63528;
        }
        .content-wrapper {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 2.5rem;
            padding: 2.2rem 0 3rem;
        }
        .main-content {
            min-width: 0;
        }
        .sidebar {
            background: #fff;
            padding: 1.6rem 1.4rem;
            border-radius: 16px;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
            border: 1px solid #eae3d8;
            align-self: start;
            position: sticky;
            top: 85px;
        }
        .sidebar h3 {
            font-size: 1.2rem;
            margin-top: 0;
            border-bottom: 2px solid #e6d9c8;
            padding-bottom: 0.4rem;
        }
        .sidebar ul {
            list-style: none;
            padding-left: 0;
        }
        .sidebar li {
            margin-bottom: 0.5rem;
        }
        .sidebar a {
            display: block;
            padding: 0.3rem 0.6rem;
            border-radius: 6px;
            font-size: 0.92rem;
            transition: background 0.15s;
        }
        .sidebar a:hover {
            background: #f0ebe4;
            text-decoration: none;
        }
        .toc {
            background: #fff;
            border: 1px solid #e6d9c8;
            border-radius: 14px;
            padding: 1.4rem 1.8rem;
            margin-bottom: 2.2rem;
        }
        .toc strong {
            font-size: 1.1rem;
            display: block;
            margin-bottom: 0.4rem;
        }
        .toc ol {
            margin-bottom: 0;
            columns: 2 240px;
            column-gap: 2rem;
        }
        .toc li {
            break-inside: avoid;
            font-size: 0.94rem;
        }
        .feature-image {
            margin: 1.8rem 0 2.2rem;
            border-radius: 16px;
            overflow: hidden;
            box-shadow: 0 6px 24px rgba(0, 0, 0, 0.08);
            background: #e6d9c8;
        }
        .feature-image img {
            width: 100%;
            max-height: 460px;
            object-fit: cover;
        }
        .feature-image figcaption {
            padding: 0.6rem 1rem;
            font-size: 0.88rem;
            color: #4d3e32;
            background: #f8f6f0;
            font-style: italic;
        }
        .highlight-box {
            background: #f0ebe4;
            border-left: 5px solid #c44536;
            padding: 1.2rem 1.6rem;
            border-radius: 0 12px 12px 0;
            margin: 1.4rem 0;
        }
        .highlight-box p:last-child {
            margin-bottom: 0;
        }
        .interview-block {
            background: #fff;
            border: 2px solid #e6d9c8;
            border-radius: 16px;
            padding: 1.6rem 1.8rem;
            margin: 1.6rem 0;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.03);
        }
        .interview-block .speaker {
            font-weight: 700;
            color: #c44536;
        }
        .user-interactions {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1.6rem;
            margin: 2.4rem 0 1.6rem;
        }
        .interaction-card {
            background: #fff;
            border: 1px solid #eae3d8;
            border-radius: 16px;
            padding: 1.4rem 1.6rem;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
        }
        .interaction-card h4 {
            margin-top: 0;
            font-size: 1.1rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .interaction-card form {
            display: flex;
            flex-direction: column;
            gap: 0.7rem;
            margin-top: 0.6rem;
        }
        .interaction-card input,
        .interaction-card textarea,
        .interaction-card select {
            padding: 0.6rem 1rem;
            border: 2px solid #d4c8b8;
            border-radius: 10px;
            font-size: 0.95rem;
            background: #fbf9f6;
            transition: border 0.2s;
            width: 100%;
        }
        .interaction-card input:focus,
        .interaction-card textarea:focus,
        .interaction-card select:focus {
            border-color: #c44536;
            outline: none;
        }
        .interaction-card textarea {
            min-height: 80px;
            resize: vertical;
        }
        .interaction-card .btn-submit {
            background: #c44536;
            color: #fff;
            border: none;
            padding: 0.6rem 1.6rem;
            border-radius: 40px;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.2s;
            align-self: flex-start;
        }
        .interaction-card .btn-submit:hover {
            background: #a63528;
        }
        .star-rating {
            display: flex;
            gap: 0.2rem;
            direction: rtl;
            justify-content: flex-end;
            font-size: 1.6rem;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            color: #ddd6ca;
            cursor: pointer;
            transition: color 0.15s;
        }
        .star-rating label:hover,
        .star-rating label:hover~label,
        .star-rating input:checked~label {
            color: #f5b342;
        }
        .star-label {
            font-size: 0.9rem;
            margin-top: 0.2rem;
            color: #6b5a4b;
        }
        .site-footer {
            background: #1e2a2f;
            color: #d4c8b8;
            padding: 2.2rem 0 1.6rem;
            margin-top: auto;
            border-top: 4px solid #c44536;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 2rem;
        }
        .site-footer h4 {
            color: #f8f6f0;
            margin-top: 0;
            font-size: 1.1rem;
            border-bottom: 2px solid #3a4a52;
            padding-bottom: 0.4rem;
        }
        friend-link {
            display: block;
            margin-top: 0.4rem;
        }
        friend-link a {
            color: #d4c8b8;
            display: inline-block;
            padding: 0.2rem 0.6rem 0.2rem 0;
            transition: color 0.2s;
        }
        friend-link a:hover {
            color: #f5b342;
            text-decoration: none;
        }
        .copyright {
            margin-top: 1.8rem;
            padding-top: 1.2rem;
            border-top: 1px solid #3a4a52;
            font-size: 0.85rem;
            text-align: center;
            color: #8e7a6b;
        }
        .copyright strong {
            color: #d4c8b8;
        }
        @media (max-width: 860px) {
            .content-wrapper {
                grid-template-columns: 1fr;
            }
            .sidebar {
                position: static;
                order: 2;
            }
            .user-interactions {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 1.2rem;
            }
            .hero h1 {
                font-size: 2rem;
            }
            h1 {
                font-size: 1.9rem;
            }
            h2 {
                font-size: 1.5rem;
            }
            .toc ol {
                columns: 1;
            }
        }
        @media (max-width: 640px) {
            .nav-menu {
                display: none;
                flex-direction: column;
                width: 100%;
                background: #1e2a2f;
                padding: 0.6rem 0 1rem;
                border-top: 1px solid #3a4a52;
                margin-top: 0.4rem;
            }
            .nav-menu.open {
                display: flex;
            }
            .nav-menu a {
                padding: 0.5rem 1.2rem;
                width: 100%;
                border-radius: 0;
            }
            .nav-toggle {
                display: block;
            }
            .header-inner {
                flex-wrap: wrap;
            }
            .my-logo {
                font-size: 1.4rem;
                margin-left: -10px;
                padding: 0.2rem 0.8rem 0.2rem 1rem;
            }
            .hero h1 {
                font-size: 1.6rem;
            }
            .hero .tagline {
                font-size: 0.95rem;
            }
            .search-form input[type="text"] {
                flex: 1 1 100%;
            }
            .search-form button {
                width: 100%;
                justify-content: center;
            }
            .interaction-card {
                padding: 1rem;
            }
            .star-rating {
                font-size: 1.4rem;
            }
        }
        @media (min-width: 641px) {
            .nav-toggle {
                display: none !important;
            }
            .nav-menu {
                display: flex !important;
            }
        }
        .text-muted {
            color: #6b5a4b;
            font-size: 0.92rem;
        }
        .mt-1 {
            margin-top: 0.6rem;
        }
        .mb-1 {
            margin-bottom: 0.6rem;
        }
        .flex-center {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            flex-wrap: wrap;
        }
        .emoji-lg {
            font-size: 1.4rem;
        }