*,
        *::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', sans-serif;
            background: #f4f7fb;
            color: #1a1a2e;
            line-height: 1.75;
            padding: 0 1rem;
        }
        a {
            color: #0f4c75;
            text-decoration: none;
            transition: color 0.2s;
        }
        a:hover {
            color: #1b7eaf;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 12px;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            background: #ffffff;
            box-shadow: 0 0 40px rgba(0, 0, 0, 0.05);
            border-radius: 24px;
            padding: 1.5rem 2rem 2rem;
        }
        header {
            padding: 1.25rem 0 0.75rem;
            border-bottom: 2px solid #e8edf3;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            position: relative;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            color: #0a2540;
            transition: transform 0.2s;
            display: inline-flex;
            align-items: center;
            gap: 0.3rem;
        }
        .my-logo:hover {
            transform: scale(1.02);
            text-decoration: none;
        }
        .my-logo i {
            color: #f5a623;
            font-size: 1.6rem;
        }
        .my-logo span {
            background: linear-gradient(135deg, #0f4c75, #1b7eaf);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        nav {
            display: flex;
            align-items: center;
            gap: 0.25rem;
            flex-wrap: wrap;
        }
        nav a {
            padding: 0.5rem 0.9rem;
            border-radius: 40px;
            font-weight: 500;
            font-size: 0.9rem;
            color: #1a1a2e;
            transition: background 0.2s, color 0.2s;
        }
        nav a:hover {
            background: #0f4c75;
            color: #fff;
            text-decoration: none;
        }
        nav a.active {
            background: #0f4c7515;
            color: #0f4c75;
            font-weight: 600;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 1.8rem;
            cursor: pointer;
            color: #0a2540;
            padding: 0.2rem 0.5rem;
            border-radius: 8px;
            transition: background 0.2s;
        }
        .hamburger:hover {
            background: #e8edf3;
        }
        #nav-toggle {
            display: none;
        }
        .breadcrumb {
            padding: 1rem 0 0.5rem;
            font-size: 0.85rem;
            color: #5a6a7a;
            display: flex;
            flex-wrap: wrap;
            gap: 0.3rem 0.6rem;
            list-style: none;
            width: 100%;
            margin-top: 0.5rem;
        }
        .breadcrumb li+li::before {
            content: "›";
            margin-right: 0.6rem;
            color: #b0c4d8;
            font-weight: 600;
        }
        .breadcrumb a {
            color: #0f4c75;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .search-bar {
            display: flex;
            gap: 0.5rem;
            width: 100%;
            max-width: 480px;
            margin: 1.2rem 0 0.8rem;
        }
        .search-bar input {
            flex: 1;
            padding: 0.7rem 1.2rem;
            border: 2px solid #dce4ec;
            border-radius: 60px;
            font-size: 0.95rem;
            outline: none;
            transition: border 0.2s;
            background: #f9fbfd;
        }
        .search-bar input:focus {
            border-color: #0f4c75;
        }
        .search-bar button {
            background: #0f4c75;
            border: none;
            color: #fff;
            padding: 0 1.3rem;
            border-radius: 60px;
            font-size: 1rem;
            cursor: pointer;
            transition: background 0.2s, transform 0.1s;
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }
        .search-bar button:hover {
            background: #1b7eaf;
            transform: scale(1.02);
        }
        h1 {
            font-size: 2.6rem;
            font-weight: 800;
            line-height: 1.2;
            margin: 1.2rem 0 0.6rem;
            color: #0a2540;
            letter-spacing: -0.5px;
        }
        h2 {
            font-size: 1.9rem;
            font-weight: 700;
            margin: 2.4rem 0 1rem;
            padding-bottom: 0.4rem;
            border-bottom: 3px solid #e8edf3;
            color: #0a2540;
            letter-spacing: -0.3px;
        }
        h3 {
            font-size: 1.45rem;
            font-weight: 600;
            margin: 1.8rem 0 0.8rem;
            color: #1a3a5a;
        }
        h4 {
            font-size: 1.2rem;
            font-weight: 600;
            margin: 1.2rem 0 0.5rem;
            color: #2a4a6a;
        }
        p {
            margin-bottom: 1.2rem;
            color: #2c3e4e;
        }
        .meta-info {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem 2rem;
            font-size: 0.9rem;
            color: #5a6a7a;
            margin-bottom: 1.5rem;
            padding: 0.5rem 0;
            border-bottom: 1px dashed #dce4ec;
        }
        .meta-info i {
            margin-right: 0.4rem;
            color: #0f4c75;
        }
        .last-updated {
            font-weight: 500;
            color: #0f4c75;
        }
        .content {
            margin: 1.5rem 0;
        }
        .content ul,
        .content ol {
            margin: 0.8rem 0 1.5rem 1.8rem;
        }
        .content li {
            margin-bottom: 0.5rem;
        }
        .highlight-box {
            background: #f0f6fe;
            border-left: 5px solid #0f4c75;
            padding: 1.2rem 1.8rem;
            border-radius: 12px;
            margin: 1.8rem 0;
        }
        .highlight-box strong {
            color: #0a2540;
        }
        .emoji-lg {
            font-size: 1.3rem;
        }
        .stat-badge {
            display: inline-block;
            background: #0f4c75;
            color: #fff;
            padding: 0.15rem 0.8rem;
            border-radius: 40px;
            font-size: 0.8rem;
            font-weight: 600;
        }
        .responsive-table {
            overflow-x: auto;
            margin: 1.5rem 0;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.95rem;
            background: #fafcff;
            border-radius: 12px;
            overflow: hidden;
        }
        th,
        td {
            padding: 0.8rem 1rem;
            text-align: left;
            border-bottom: 1px solid #e8edf3;
        }
        th {
            background: #0f4c75;
            color: #fff;
            font-weight: 600;
        }
        tr:last-child td {
            border-bottom: none;
        }
        tr:hover td {
            background: #f0f6fe;
        }
        .featured-image {
            margin: 2rem 0;
            border-radius: 16px;
            overflow: hidden;
            background: #e8edf3;
            position: relative;
        }
        .featured-image img {
            width: 100%;
            object-fit: cover;
            max-height: 520px;
        }
        .featured-image figcaption {
            padding: 0.8rem 1.2rem;
            font-size: 0.85rem;
            color: #4a5a6a;
            background: #f4f7fb;
            font-style: italic;
        }
        .interaction-area {
            margin: 2.8rem 0 1.5rem;
            padding: 2rem;
            background: #f9fbfd;
            border-radius: 20px;
            border: 1px solid #e8edf3;
        }
        .interaction-area h3 {
            margin-top: 0;
        }
        .form-group {
            margin-bottom: 1.2rem;
        }
        .form-group label {
            display: block;
            font-weight: 600;
            margin-bottom: 0.3rem;
            color: #1a3a5a;
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 0.7rem 1rem;
            border: 2px solid #dce4ec;
            border-radius: 12px;
            font-size: 0.95rem;
            font-family: inherit;
            transition: border 0.2s;
            background: #fff;
        }
        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            border-color: #0f4c75;
            outline: none;
        }
        .form-group textarea {
            min-height: 100px;
            resize: vertical;
        }
        .btn-primary {
            background: #0f4c75;
            color: #fff;
            border: none;
            padding: 0.7rem 2rem;
            border-radius: 60px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.2s, transform 0.1s;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
        }
        .btn-primary:hover {
            background: #1b7eaf;
            transform: translateY(-2px);
        }
        .star-rating {
            display: flex;
            flex-direction: row-reverse;
            gap: 0.3rem;
            justify-content: flex-end;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            font-size: 1.8rem;
            color: #dce4ec;
            cursor: pointer;
            transition: color 0.2s, transform 0.1s;
        }
        .star-rating label:hover,
        .star-rating label:hover~label,
        .star-rating input:checked~label {
            color: #f5a623;
            transform: scale(1.05);
        }
        friend-link {
            display: block;
            margin-top: 2rem;
            padding: 1.5rem 0 0.5rem;
            border-top: 2px solid #e8edf3;
        }
        friend-link .friend-list {
            display: flex;
            flex-wrap: wrap;
            gap: 0.8rem 1.5rem;
            list-style: none;
            padding: 0.5rem 0 0;
        }
        friend-link .friend-list li a {
            font-weight: 500;
            padding: 0.3rem 0.8rem;
            background: #f0f6fe;
            border-radius: 40px;
            font-size: 0.9rem;
            transition: background 0.2s;
        }
        friend-link .friend-list li a:hover {
            background: #0f4c75;
            color: #fff;
            text-decoration: none;
        }
        footer {
            padding: 1.8rem 0 1rem;
            border-top: 2px solid #e8edf3;
            margin-top: 2rem;
            text-align: center;
            color: #5a6a7a;
            font-size: 0.9rem;
        }
        footer .copyright {
            font-weight: 400;
            letter-spacing: 0.2px;
        }
        footer .copyright strong {
            color: #0a2540;
        }
        @media (max-width: 900px) {
            .container {
                padding: 1rem 1.2rem;
            }
            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.6rem;
            }
            h3 {
                font-size: 1.25rem;
            }
            .my-logo {
                font-size: 1.5rem;
            }
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
            nav {
                display: none;
                width: 100%;
                flex-direction: column;
                background: #ffffff;
                padding: 1rem 0 0.5rem;
                border-top: 1px solid #e8edf3;
                margin-top: 0.8rem;
                gap: 0.2rem;
            }
            nav a {
                padding: 0.6rem 1rem;
                border-radius: 12px;
                width: 100%;
            }
            #nav-toggle:checked~nav {
                display: flex;
            }
            header {
                flex-wrap: wrap;
            }
            .breadcrumb {
                font-size: 0.78rem;
            }
            .search-bar {
                max-width: 100%;
                flex-wrap: wrap;
            }
            .search-bar button {
                padding: 0.6rem 1.2rem;
                flex: 1;
                justify-content: center;
            }
            .interaction-area {
                padding: 1.2rem;
            }
            .star-rating label {
                font-size: 1.5rem;
            }
            .meta-info {
                flex-direction: column;
                gap: 0.3rem;
            }
            table {
                font-size: 0.85rem;
            }
            th,
            td {
                padding: 0.5rem 0.6rem;
            }
        }
        @media (max-width: 480px) {
            .container {
                padding: 0.8rem 0.8rem;
                border-radius: 16px;
            }
            h1 {
                font-size: 1.6rem;
            }
            h2 {
                font-size: 1.35rem;
            }
            h3 {
                font-size: 1.1rem;
            }
            .my-logo {
                font-size: 1.3rem;
            }
            .my-logo i {
                font-size: 1.2rem;
            }
            .btn-primary {
                width: 100%;
                justify-content: center;
            }
        }
        .schema-hidden {
            display: none;
        }