*,
        *::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, sans-serif;
            background: #f5f7fc;
            color: #1e2a3a;
            line-height: 1.75;
            padding: 0 16px;
        }
        a {
            color: #1a6bb0;
            text-decoration: none;
            transition: color 0.2s;
        }
        a:hover {
            color: #0d3f6b;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        ul,
        ol {
            padding-left: 1.4rem;
        }
        li {
            margin-bottom: 0.3rem;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.3;
            margin-top: 1.8rem;
            margin-bottom: 0.6rem;
            color: #0b1c2e;
        }
        h1 {
            font-size: 2.2rem;
            margin-top: 0.4rem;
        }
        h2 {
            font-size: 1.7rem;
            border-bottom: 2px solid #dce3ed;
            padding-bottom: 0.3rem;
        }
        h3 {
            font-size: 1.35rem;
        }
        h4 {
            font-size: 1.1rem;
            font-weight: 600;
        }
        p {
            margin-bottom: 1rem;
        }
        .container {
            max-width: 1140px;
            margin: 0 auto;
            background: #ffffff;
            box-shadow: 0 0 30px rgba(0, 0, 0, 0.04);
            border-radius: 20px;
            padding: 20px 28px 40px;
        }
        .site-header {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            padding: 12px 0 8px;
            border-bottom: 1px solid #e5eaf0;
            margin-bottom: 12px;
        }
        .my-logo {
            font-size: 1.9rem;
            font-weight: 800;
            background: linear-gradient(135deg, #f9b81b, #e85d1a);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: -0.5px;
            text-decoration: none !important;
        }
        .my-logo:hover {
            opacity: 0.85;
            text-decoration: none !important;
        }
        .my-logo small {
            font-size: 0.8rem;
            font-weight: 400;
            -webkit-text-fill-color: #4a5b6e;
            color: #4a5b6e;
            background: none;
            letter-spacing: 0;
        }
        .nav-bar {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-list {
            display: flex;
            list-style: none;
            gap: 8px 16px;
            flex-wrap: wrap;
            padding: 0;
            margin: 0;
        }
        .nav-list li a {
            font-weight: 500;
            padding: 4px 10px;
            border-radius: 30px;
            background: transparent;
            transition: background 0.2s, color 0.2s;
            font-size: 0.92rem;
        }
        .nav-list li a:hover {
            background: #eef3fa;
            text-decoration: none;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 1.7rem;
            color: #1e2a3a;
            cursor: pointer;
            padding: 4px 8px;
        }
        #nav-toggle {
            display: none;
        }
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            padding: 8px 0 12px;
            margin: 0 0 8px 0;
            font-size: 0.85rem;
            color: #5f6f80;
        }
        .breadcrumb li+li::before {
            content: "›";
            padding: 0 8px;
            color: #a0b0c0;
        }
        .breadcrumb a {
            color: #1a6bb0;
        }
        .breadcrumb .active {
            color: #2c3e50;
            font-weight: 500;
        }
        .search-block {
            background: #f0f4fa;
            border-radius: 16px;
            padding: 24px 28px;
            margin: 20px 0 30px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 14px;
        }
        .search-block label {
            font-weight: 600;
            font-size: 1.1rem;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .search-form {
            display: flex;
            flex: 1 1 300px;
            gap: 8px;
        }
        .search-form input {
            flex: 1;
            padding: 10px 16px;
            border: 1px solid #ccd7e4;
            border-radius: 40px;
            font-size: 0.95rem;
            outline: none;
            transition: border 0.2s;
            background: #fff;
        }
        .search-form input:focus {
            border-color: #1a6bb0;
            box-shadow: 0 0 0 3px rgba(26, 107, 176, 0.12);
        }
        .search-form button {
            padding: 10px 22px;
            border: none;
            border-radius: 40px;
            background: #1a6bb0;
            color: #fff;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.2s;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .search-form button:hover {
            background: #0d4f86;
        }
        .interaction-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
            margin: 30px 0 20px;
        }
        .interaction-card {
            background: #f8faff;
            border-radius: 16px;
            padding: 22px 24px;
            border: 1px solid #e5ecf5;
        }
        .interaction-card h3 {
            margin-top: 0;
            font-size: 1.2rem;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .interaction-card form {
            display: flex;
            flex-direction: column;
            gap: 12px;
            margin-top: 10px;
        }
        .interaction-card input,
        .interaction-card textarea,
        .interaction-card select {
            padding: 10px 14px;
            border: 1px solid #ccd7e4;
            border-radius: 10px;
            font-size: 0.92rem;
            outline: none;
            font-family: inherit;
            transition: border 0.2s;
            background: #fff;
        }
        .interaction-card input:focus,
        .interaction-card textarea:focus,
        .interaction-card select:focus {
            border-color: #1a6bb0;
            box-shadow: 0 0 0 3px rgba(26, 107, 176, 0.1);
        }
        .interaction-card textarea {
            min-height: 80px;
            resize: vertical;
        }
        .interaction-card .btn-submit {
            padding: 10px 20px;
            border: none;
            border-radius: 40px;
            background: #1e2a3a;
            color: #fff;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.2s;
            align-self: flex-start;
        }
        .interaction-card .btn-submit:hover {
            background: #0b1c2e;
        }
        .star-rating {
            display: flex;
            flex-direction: row-reverse;
            justify-content: flex-end;
            gap: 4px;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            font-size: 1.8rem;
            color: #ccd7e4;
            cursor: pointer;
            transition: color 0.15s;
        }
        .star-rating input:checked~label,
        .star-rating label:hover,
        .star-rating label:hover~label {
            color: #f5b81b;
        }
        .feature-image {
            margin: 28px 0 20px;
            border-radius: 18px;
            overflow: hidden;
            box-shadow: 0 4px 18px rgba(0, 0, 0, 0.06);
            background: #eef2f7;
            text-align: center;
        }
        .feature-image img {
            width: 100%;
            max-height: 460px;
            object-fit: cover;
        }
        .feature-image figcaption {
            padding: 10px 16px;
            font-size: 0.85rem;
            color: #4a5b6e;
            background: #f5f9ff;
            border-top: 1px solid #e5ecf5;
        }
        friend-link {
            display: block;
            padding: 18px 0 8px;
            margin-top: 30px;
            border-top: 2px solid #e5eaf0;
            font-size: 0.95rem;
        }
        friend-link strong {
            display: inline-block;
            margin-right: 10px;
            font-size: 1rem;
        }
        friend-link a {
            display: inline-block;
            margin: 4px 12px 4px 0;
            padding: 2px 0;
        }
        .site-footer {
            margin-top: 30px;
            padding: 20px 0 12px;
            border-top: 1px solid #e5eaf0;
            font-size: 0.88rem;
            color: #4a5b6e;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
        }
        .site-footer .copyright {
            font-weight: 400;
        }
        @media (max-width: 820px) {
            .container {
                padding: 16px 14px 30px;
            }
            h1 {
                font-size: 1.7rem;
            }
            h2 {
                font-size: 1.4rem;
            }
            .interaction-grid {
                grid-template-columns: 1fr;
                gap: 18px;
            }
            .search-block {
                flex-direction: column;
                align-items: stretch;
                padding: 18px 16px;
            }
            .search-form {
                flex-wrap: wrap;
            }
            .search-form input {
                min-width: 140px;
            }
            .nav-list {
                display: none;
                flex-direction: column;
                width: 100%;
                background: #ffffff;
                border: 1px solid #e5eaf0;
                border-radius: 16px;
                padding: 12px 16px;
                margin-top: 8px;
                box-shadow: 0 8px 24px rgba(0, 0, 0, 0.04);
            }
            .nav-list li a {
                display: block;
                padding: 8px 6px;
            }
            .hamburger {
                display: inline-block;
            }
            #nav-toggle:checked~.nav-list {
                display: flex;
            }
            .site-header {
                flex-wrap: wrap;
            }
            .nav-bar {
                order: 3;
                width: 100%;
            }
            .site-footer {
                flex-direction: column;
                text-align: center;
            }
        }
        @media (max-width: 480px) {
            body {
                padding: 0 6px;
            }
            .container {
                padding: 12px 10px 24px;
            }
            h1 {
                font-size: 1.4rem;
            }
            h2 {
                font-size: 1.2rem;
            }
            .my-logo {
                font-size: 1.5rem;
            }
            .breadcrumb {
                font-size: 0.75rem;
            }
            .interaction-card {
                padding: 16px;
            }
        }
        .last-updated {
            display: inline-block;
            background: #eef3fa;
            padding: 4px 14px;
            border-radius: 40px;
            font-size: 0.8rem;
            color: #2c3e50;
            margin-bottom: 12px;
        }
        .emoji-big {
            font-size: 1.3rem;
        }
        .highlight-box {
            background: #f0f7ff;
            border-left: 4px solid #1a6bb0;
            padding: 14px 20px;
            border-radius: 0 12px 12px 0;
            margin: 18px 0;
        }
        .highlight-box strong {
            color: #0b1c2e;
        }
        .table-wrap {
            overflow-x: auto;
            margin: 18px 0;
        }
        .table-wrap table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.92rem;
        }
        .table-wrap th,
        .table-wrap td {
            padding: 10px 14px;
            border: 1px solid #dce3ed;
            text-align: left;
        }
        .table-wrap th {
            background: #eef3fa;
            font-weight: 600;
        }
        .table-wrap tr:nth-child(even) {
            background: #f8faff;
        }
        .btn-scroll-top {
            position: fixed;
            bottom: 24px;
            right: 24px;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: #1e2a3a;
            color: #fff;
            border: none;
            font-size: 1.2rem;
            cursor: pointer;
            box-shadow: 0 4px 14px rgba(0, 0, 0, 0.12);
            transition: background 0.2s, transform 0.2s;
            display: flex;
            align-items: center;
            justify-content: center;
            opacity: 0.7;
        }
        .btn-scroll-top:hover {
            background: #0b1c2e;
            transform: scale(1.05);
            opacity: 1;
        }
        .anchor-offset {
            scroll-margin-top: 20px;
        }