*,
        *::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, sans-serif;
            background: #f5f7fa;
            color: #1e2a3a;
            line-height: 1.7;
            padding: 0 1rem;
        }
        a {
            color: #c0392b;
            text-decoration: underline;
            transition: color 0.25s;
        }
        a:hover,
        a:focus-visible {
            color: #e74c3c;
            text-decoration: none;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 12px;
        }
        h1,
        h2,
        h3,
        h4 {
            font-weight: 700;
            line-height: 1.3;
            margin-top: 2rem;
            margin-bottom: 0.75rem;
            color: #0f1a2e;
        }
        h1 {
            font-size: 2.4rem;
            border-left: 6px solid #c0392b;
            padding-left: 1.2rem;
        }
        h2 {
            font-size: 1.8rem;
            border-bottom: 2px solid #e0e4ec;
            padding-bottom: 0.4rem;
        }
        h3 {
            font-size: 1.35rem;
        }
        h4 {
            font-size: 1.1rem;
            color: #2c3e50;
        }
        p {
            margin-bottom: 1.2rem;
        }
        ul,
        ol {
            margin: 0.8rem 0 1.5rem 2rem;
        }
        li {
            margin-bottom: 0.4rem;
        }
        b,
        strong {
            font-weight: 700;
            color: #0f1a2e;
        }
        .wrapper {
            max-width: 1120px;
            margin: 0 auto;
            background: #ffffff;
            box-shadow: 0 0 40px rgba(0, 0, 0, 0.04);
            border-radius: 24px;
            padding: 1.5rem 2rem 2.5rem;
        }
        @media (max-width: 640px) {
            .wrapper {
                padding: 1rem 1rem 2rem;
            }
            h1 {
                font-size: 1.7rem;
                padding-left: 0.8rem;
            }
            h2 {
                font-size: 1.35rem;
            }
            h3 {
                font-size: 1.15rem;
            }
        }
        .site-header {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            padding: 0.8rem 0 1rem;
            border-bottom: 1px solid #e8ecf2;
            position: relative;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 900;
            letter-spacing: -0.5px;
            background: linear-gradient(135deg, #c0392b, #e67e22);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            text-decoration: none !important;
            display: inline-flex;
            align-items: center;
            gap: 0.3rem;
        }
        .my-logo i {
            -webkit-text-fill-color: initial;
            color: #c0392b;
            font-size: 1.6rem;
        }
        .my-logo small {
            font-size: 0.7rem;
            font-weight: 400;
            -webkit-text-fill-color: initial;
            color: #5a6a7a;
            display: block;
            letter-spacing: 0.3px;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: 2px solid #c0392b;
            color: #c0392b;
            font-size: 1.5rem;
            padding: 0.3rem 0.8rem;
            border-radius: 8px;
            cursor: pointer;
            transition: background 0.2s;
        }
        .nav-toggle:hover {
            background: #c0392b;
            color: #fff;
        }
        .primary-nav {
            display: flex;
            flex-wrap: wrap;
            gap: 0.2rem 1.2rem;
            align-items: center;
        }
        .primary-nav a {
            text-decoration: none;
            font-weight: 600;
            color: #1e2a3a;
            padding: 0.3rem 0;
            border-bottom: 2px solid transparent;
            transition: border-color 0.2s, color 0.2s;
            font-size: 0.95rem;
        }
        .primary-nav a:hover,
        .primary-nav a:focus-visible {
            border-bottom-color: #c0392b;
            color: #c0392b;
        }
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            padding: 1rem 0 0.5rem;
            margin: 0;
            font-size: 0.85rem;
            color: #6a7a8a;
        }
        .breadcrumb li+li::before {
            content: "›";
            margin: 0 0.6rem;
            color: #b0b8c4;
        }
        .breadcrumb a {
            color: #5a6a7a;
            text-decoration: none;
        }
        .breadcrumb a:hover {
            color: #c0392b;
        }
        .breadcrumb .current {
            color: #1e2a3a;
            font-weight: 600;
        }
        .search-block {
            background: #f0f2f6;
            border-radius: 16px;
            padding: 1.2rem 1.8rem;
            margin: 1.5rem 0 2rem;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 0.8rem;
        }
        .search-block label {
            font-weight: 600;
            font-size: 1rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .search-block form {
            display: flex;
            flex: 1;
            gap: 0.5rem;
            flex-wrap: wrap;
        }
        .search-block input[type="text"] {
            flex: 1;
            min-width: 160px;
            padding: 0.6rem 1rem;
            border: 2px solid #d0d6e0;
            border-radius: 40px;
            font-size: 0.95rem;
            outline: none;
            transition: border 0.2s;
        }
        .search-block input[type="text"]:focus {
            border-color: #c0392b;
        }
        .search-block button {
            background: #c0392b;
            color: #fff;
            border: none;
            padding: 0.6rem 1.6rem;
            border-radius: 40px;
            font-weight: 700;
            font-size: 0.95rem;
            cursor: pointer;
            transition: background 0.2s, transform 0.1s;
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }
        .search-block button:hover {
            background: #a93226;
            transform: scale(1.02);
        }
        .featured-figure {
            margin: 2rem 0 2.2rem;
            text-align: center;
        }
        .featured-figure img {
            width: 100%;
            max-width: 820px;
            margin: 0 auto;
            border-radius: 16px;
            box-shadow: 0 6px 24px rgba(0, 0, 0, 0.08);
        }
        .featured-figure figcaption {
            font-size: 0.85rem;
            color: #5a6a7a;
            margin-top: 0.6rem;
            font-style: italic;
        }
        .interaction-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1.5rem;
            margin: 2.2rem 0 1.8rem;
        }
        @media (max-width: 700px) {
            .interaction-grid {
                grid-template-columns: 1fr;
            }
        }
        .card-box {
            background: #f8fafc;
            border-radius: 16px;
            padding: 1.5rem 1.8rem;
            border: 1px solid #e8ecf2;
        }
        .card-box h3 {
            margin-top: 0;
            font-size: 1.2rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .card-box form {
            display: flex;
            flex-direction: column;
            gap: 0.7rem;
            margin-top: 0.8rem;
        }
        .card-box textarea,
        .card-box input[type="text"],
        .card-box input[type="number"] {
            padding: 0.6rem 1rem;
            border: 2px solid #d0d6e0;
            border-radius: 10px;
            font-size: 0.95rem;
            font-family: inherit;
            outline: none;
            transition: border 0.2s;
            width: 100%;
        }
        .card-box textarea:focus,
        .card-box input:focus {
            border-color: #c0392b;
        }
        .card-box textarea {
            min-height: 80px;
            resize: vertical;
        }
        .card-box button {
            background: #1e2a3a;
            color: #fff;
            border: none;
            padding: 0.6rem 1.4rem;
            border-radius: 40px;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.2s, transform 0.1s;
            align-self: flex-start;
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }
        .card-box button:hover {
            background: #0f1a2e;
            transform: scale(1.02);
        }
        .star-rating {
            display: flex;
            gap: 0.3rem;
            font-size: 1.6rem;
            color: #e0a800;
            cursor: default;
        }
        .star-rating i {
            transition: transform 0.15s;
        }
        .star-rating i:hover {
            transform: scale(1.2);
        }
        .site-footer {
            margin-top: 3rem;
            padding-top: 1.8rem;
            border-top: 2px solid #e8ecf2;
            font-size: 0.9rem;
            color: #4a5a6a;
        }
        .footer-flex {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 1.5rem 2rem;
        }
        friend-link {
            display: block;
            background: #f0f2f6;
            border-radius: 12px;
            padding: 1rem 1.5rem;
            margin: 1.2rem 0 0.8rem;
            font-weight: 500;
        }
        friend-link a {
            display: inline-block;
            margin: 0.2rem 1rem 0.2rem 0;
        }
        .copyright {
            text-align: center;
            padding: 1rem 0 0.2rem;
            font-size: 0.82rem;
            color: #7a8a9a;
            border-top: 1px solid #e0e4ec;
            margin-top: 1rem;
        }
        .last-updated {
            display: inline-block;
            background: #eef0f4;
            padding: 0.2rem 1rem;
            border-radius: 40px;
            font-size: 0.8rem;
            color: #3a4a5a;
            margin-bottom: 1rem;
        }
        @media (max-width: 720px) {
            .nav-toggle {
                display: block;
            }
            .primary-nav {
                display: none;
                width: 100%;
                flex-direction: column;
                align-items: flex-start;
                padding: 1rem 0 0.5rem;
                gap: 0.2rem;
            }
            .primary-nav.open {
                display: flex;
            }
            .primary-nav a {
                padding: 0.5rem 0;
                font-size: 1.05rem;
                border-bottom: 1px solid #e8ecf2;
                width: 100%;
            }
        }
        .link-list-inline {
            display: flex;
            flex-wrap: wrap;
            gap: 0.3rem 1.2rem;
            list-style: none;
            margin: 0.8rem 0 1.2rem;
            padding: 0;
        }
        .link-list-inline li a {
            font-weight: 500;
        }
        .badge {
            display: inline-block;
            background: #c0392b10;
            color: #c0392b;
            padding: 0.1rem 0.7rem;
            border-radius: 40px;
            font-size: 0.75rem;
            font-weight: 700;
            border: 1px solid #c0392b30;
        }
        .emoji-lg {
            font-size: 1.3rem;
        }
        .highlight-box {
            background: #fef9e7;
            border-left: 4px solid #e67e22;
            padding: 1rem 1.5rem;
            border-radius: 0 12px 12px 0;
            margin: 1.5rem 0;
        }
        .two-col {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1.5rem;
            margin: 1.2rem 0;
        }
        @media (max-width: 600px) {
            .two-col {
                grid-template-columns: 1fr;
            }
        }
        .table-wrap {
            overflow-x: auto;
            margin: 1.2rem 0;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.95rem;
        }
        th,
        td {
            padding: 0.6rem 1rem;
            text-align: left;
            border-bottom: 1px solid #e0e4ec;
        }
        th {
            background: #f0f2f6;
            font-weight: 700;
        }
        tr:hover td {
            background: #fafbfc;
        }
        .toc {
            background: #f8fafc;
            border-radius: 16px;
            padding: 1.2rem 1.8rem;
            margin: 1.8rem 0;
        }
        .toc ol {
            margin: 0.4rem 0 0 1.5rem;
        }
        .toc a {
            text-decoration: none;
            font-weight: 500;
        }