*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, Roboto, 'Helvetica Neue', Arial, sans-serif;
            background: #f6f9fc;
            color: #1a2b3e;
            line-height: 1.7;
            padding: 0 16px;
            max-width: 1200px;
            margin: 0 auto;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 12px;
        }
        a {
            color: #c44536;
            text-decoration: none;
            transition: color 0.2s ease;
        }
        a:hover,
        a:focus {
            color: #2a6f6f;
            text-decoration: underline;
        }
        ul,
        ol {
            padding-left: 1.5rem;
        }
        li {
            margin-bottom: 0.4rem;
        }
        h1 {
            font-size: 2.4rem;
            font-weight: 800;
            line-height: 1.2;
            color: #0d1b2a;
            margin-bottom: 0.5rem;
            letter-spacing: -0.02em;
        }
        h2 {
            font-size: 1.8rem;
            font-weight: 700;
            line-height: 1.3;
            color: #1b3a4b;
            margin-top: 2.8rem;
            margin-bottom: 1rem;
            border-bottom: 3px solid #e8c87a;
            padding-bottom: 0.3rem;
        }
        h3 {
            font-size: 1.35rem;
            font-weight: 600;
            line-height: 1.4;
            color: #2a4a5a;
            margin-top: 2rem;
            margin-bottom: 0.6rem;
        }
        h4 {
            font-size: 1.1rem;
            font-weight: 600;
            color: #3a5a6a;
            margin-top: 1.4rem;
            margin-bottom: 0.4rem;
        }
        p {
            margin-bottom: 1.2rem;
            font-size: 1rem;
        }
        strong {
            color: #1a3a4a;
        }
        .lead {
            font-size: 1.15rem;
            color: #2c3e50;
            font-weight: 400;
        }
        .site-header {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            padding: 1.2rem 0;
            border-bottom: 2px solid #dce6ed;
            margin-bottom: 1.2rem;
            position: relative;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            color: #c44536;
            letter-spacing: -0.03em;
            transition: transform 0.2s ease;
            display: inline-flex;
            align-items: center;
            gap: 0.3rem;
        }
        .my-logo:hover {
            transform: scale(1.02);
            text-decoration: none;
        }
        .my-logo i {
            font-size: 1.6rem;
            color: #e8c87a;
        }
        .nav-wrapper {
            display: flex;
            align-items: center;
            gap: 0.8rem;
        }
        .main-nav {
            display: flex;
            gap: 1.2rem;
            flex-wrap: wrap;
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .main-nav li a {
            font-weight: 500;
            padding: 0.4rem 0.2rem;
            position: relative;
            color: #1a2b3e;
        }
        .main-nav li a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0%;
            height: 2px;
            background: #c44536;
            transition: width 0.25s ease;
        }
        .main-nav li a:hover::after,
        .main-nav li a:focus::after {
            width: 100%;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 1.8rem;
            color: #1a2b3e;
            cursor: pointer;
            padding: 0.2rem 0.4rem;
            border-radius: 6px;
            transition: background 0.2s;
        }
        .hamburger:hover {
            background: #e8f0f5;
        }
        #nav-toggle {
            display: none;
        }
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            gap: 0.4rem 0.8rem;
            list-style: none;
            padding: 0.6rem 0 0.2rem;
            margin: 0 0 1.2rem 0;
            font-size: 0.9rem;
            color: #5a6a7a;
        }
        .breadcrumb li+li::before {
            content: "›";
            margin-right: 0.6rem;
            color: #aabac8;
            font-weight: 600;
        }
        .breadcrumb a {
            color: #2a6f6f;
        }
        .breadcrumb .current {
            color: #7a8a9a;
            font-weight: 500;
        }
        .search-form {
            display: flex;
            gap: 0.4rem;
            margin: 1.2rem 0 1.6rem;
            max-width: 520px;
            width: 100%;
        }
        .search-form input[type="search"] {
            flex: 1;
            padding: 0.7rem 1rem;
            border: 2px solid #dce6ed;
            border-radius: 40px;
            font-size: 0.95rem;
            outline: none;
            transition: border-color 0.25s, box-shadow 0.25s;
            background: #ffffff;
        }
        .search-form input[type="search"]:focus {
            border-color: #c44536;
            box-shadow: 0 0 0 4px rgba(196, 69, 54, 0.12);
        }
        .search-form button {
            background: #c44536;
            color: #fff;
            border: none;
            border-radius: 40px;
            padding: 0.7rem 1.4rem;
            font-weight: 600;
            font-size: 0.95rem;
            cursor: pointer;
            transition: background 0.25s, transform 0.15s;
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }
        .search-form button:hover {
            background: #a83226;
            transform: scale(1.02);
        }
        .content-area {
            flex: 1;
            background: #ffffff;
            border-radius: 20px;
            padding: 2rem 2.2rem;
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.04);
            margin-bottom: 2rem;
        }
        .featured-image {
            margin: 1.6rem 0 2rem;
            border-radius: 16px;
            overflow: hidden;
            background: #eef3f7;
        }
        .featured-image img {
            width: 100%;
            max-height: 480px;
            object-fit: cover;
        }
        .featured-image figcaption {
            padding: 0.6rem 1rem;
            font-size: 0.85rem;
            color: #5a6a7a;
            background: #f6f9fc;
            font-style: italic;
        }
        .update-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            background: #e8f0f5;
            padding: 0.3rem 1rem;
            border-radius: 30px;
            font-size: 0.85rem;
            color: #2a4a5a;
            margin-bottom: 1.2rem;
        }
        .context-link {
            font-weight: 500;
            border-bottom: 1px dashed #c44536;
        }
        .interaction-section {
            margin-top: 3rem;
            padding-top: 2rem;
            border-top: 2px solid #e8f0f5;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 2rem;
        }
        .interaction-section .full-width {
            grid-column: 1 / -1;
        }
        .interaction-card {
            background: #f6f9fc;
            border-radius: 16px;
            padding: 1.6rem 1.8rem;
        }
        .interaction-card h3 {
            margin-top: 0;
            display: flex;
            align-items: center;
            gap: 0.6rem;
        }
        .interaction-card form {
            display: flex;
            flex-direction: column;
            gap: 0.8rem;
            margin-top: 1rem;
        }
        .interaction-card input,
        .interaction-card textarea,
        .interaction-card select {
            padding: 0.7rem 1rem;
            border: 2px solid #dce6ed;
            border-radius: 12px;
            font-size: 0.95rem;
            font-family: inherit;
            outline: none;
            transition: border-color 0.2s;
            background: #fff;
        }
        .interaction-card input:focus,
        .interaction-card textarea:focus,
        .interaction-card select:focus {
            border-color: #c44536;
        }
        .interaction-card textarea {
            min-height: 90px;
            resize: vertical;
        }
        .interaction-card button {
            align-self: flex-start;
            background: #2a6f6f;
            color: #fff;
            border: none;
            border-radius: 40px;
            padding: 0.7rem 2rem;
            font-weight: 600;
            font-size: 0.95rem;
            cursor: pointer;
            transition: background 0.25s, transform 0.15s;
        }
        .interaction-card button:hover {
            background: #1d5555;
            transform: scale(1.02);
        }
        .star-rating-select {
            display: flex;
            gap: 0.3rem;
            flex-direction: row-reverse;
            justify-content: flex-end;
        }
        .star-rating-select input {
            display: none;
        }
        .star-rating-select label {
            font-size: 1.8rem;
            color: #d0d8e0;
            cursor: pointer;
            transition: color 0.15s;
        }
        .star-rating-select label:hover,
        .star-rating-select label:hover~label,
        .star-rating-select input:checked~label {
            color: #f5c542;
        }
        .site-footer {
            padding: 1.8rem 0 2.2rem;
            border-top: 2px solid #dce6ed;
            margin-top: auto;
            font-size: 0.9rem;
            color: #5a6a7a;
        }
        .site-footer friend-link {
            display: block;
            margin-bottom: 0.8rem;
            font-weight: 500;
        }
        .site-footer friend-link a {
            display: inline-block;
            margin: 0.2rem 0.8rem 0.2rem 0;
        }
        .site-footer .copyright {
            margin-top: 0.8rem;
            padding-top: 0.8rem;
            border-top: 1px solid #e8f0f5;
            font-size: 0.85rem;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
        }
        @media (max-width: 820px) {
            body {
                padding: 0 12px;
            }
            .content-area {
                padding: 1.5rem 1.2rem;
            }
            h1 {
                font-size: 1.8rem;
            }
            h2 {
                font-size: 1.4rem;
            }
            .interaction-section {
                grid-template-columns: 1fr;
                gap: 1.2rem;
            }
            .site-header {
                padding: 0.8rem 0;
            }
            .my-logo {
                font-size: 1.4rem;
            }
            .hamburger {
                display: block;
            }
            .main-nav {
                display: none;
                flex-direction: column;
                width: 100%;
                background: #ffffff;
                padding: 1rem 0.5rem;
                border-radius: 12px;
                box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
                margin-top: 0.6rem;
                gap: 0.4rem;
            }
            #nav-toggle:checked+.hamburger+.main-nav {
                display: flex;
            }
            .main-nav li a {
                padding: 0.5rem 0.8rem;
                display: block;
                border-radius: 8px;
            }
            .main-nav li a:hover {
                background: #f0f5fa;
            }
            .nav-wrapper {
                flex-wrap: wrap;
                justify-content: flex-end;
            }
            .breadcrumb {
                font-size: 0.8rem;
            }
            .search-form {
                max-width: 100%;
            }
        }
        @media (max-width: 480px) {
            .content-area {
                padding: 1rem 0.8rem;
            }
            h1 {
                font-size: 1.5rem;
            }
            h2 {
                font-size: 1.2rem;
            }
            .featured-image figcaption {
                font-size: 0.75rem;
            }
            .interaction-card {
                padding: 1.2rem;
            }
            .star-rating-select label {
                font-size: 1.4rem;
            }
        }
        @media print {
            .search-form,
            .interaction-section form button,
            .hamburger,
            #nav-toggle {
                display: none !important;
            }
            .main-nav {
                display: flex !important;
            }
            body {
                padding: 0;
                background: #fff;
            }
            .content-area {
                box-shadow: none;
                padding: 1rem 0;
            }
            .site-footer {
                border-top: 1px solid #ccc;
            }
        }
        ::-webkit-scrollbar {
            width: 8px;
            height: 8px;
        }
        ::-webkit-scrollbar-track {
            background: #eef3f7;
        }
        ::-webkit-scrollbar-thumb {
            background: #bac8d4;
            border-radius: 12px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: #9aacbc;
        }