*,
        *::before,
        *::after {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            line-height: 1.7;
            color: #1a1a2e;
            background: #f8f9fc;
            padding: 0 1rem;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 12px;
        }
        a {
            color: #004e92;
            text-decoration: none;
            transition: color 0.2s;
        }
        a:hover {
            color: #ff6f00;
            text-decoration: underline;
        }
        ul,
        ol {
            padding-left: 1.5rem;
            margin: 1rem 0;
        }
        li {
            margin-bottom: 0.4rem;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            color: #0b1a2e;
            margin-top: 2rem;
            margin-bottom: 0.75rem;
            font-weight: 700;
        }
        h1 {
            font-size: 2.2rem;
            margin-top: 0.5rem;
        }
        h2 {
            font-size: 1.65rem;
            border-bottom: 2px solid #e0e7f0;
            padding-bottom: 0.4rem;
        }
        h3 {
            font-size: 1.3rem;
        }
        h4 {
            font-size: 1.1rem;
        }
        p {
            margin-bottom: 1.2rem;
            color: #2d3748;
        }
        .container {
            max-width: 1120px;
            margin: 0 auto;
            background: #ffffff;
            border-radius: 20px;
            box-shadow: 0 10px 40px rgba(0, 0, 0, 0.06);
            padding: 1.5rem 2rem 2rem;
        }
        @media (max-width: 640px) {
            body {
                padding: 0 0.5rem;
            }
            .container {
                padding: 1rem 1rem 1.5rem;
                border-radius: 12px;
            }
            h1 {
                font-size: 1.6rem;
            }
            h2 {
                font-size: 1.3rem;
            }
            h3 {
                font-size: 1.1rem;
            }
        }
        .site-header {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            padding: 0.8rem 0 1rem;
            border-bottom: 2px solid #eef2f7;
            position: relative;
        }
        .my-logo {
            font-size: 1.9rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            background: linear-gradient(135deg, #0b1a2e, #004e92);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            gap: 0.3rem;
        }
        .my-logo:hover {
            -webkit-text-fill-color: #ff6f00;
            text-decoration: none;
        }
        .my-logo i {
            -webkit-text-fill-color: #ff6f00;
            font-size: 1.6rem;
        }
        .logo-sub {
            font-size: 0.7rem;
            -webkit-text-fill-color: #6b7a8f;
            display: block;
            font-weight: 400;
            letter-spacing: 0.3px;
        }
        .nav-wrapper {
            display: flex;
            align-items: center;
            gap: 0.3rem;
        }
        .nav-list {
            display: flex;
            list-style: none;
            gap: 0.2rem;
            padding: 0;
            margin: 0;
            flex-wrap: wrap;
        }
        .nav-list li a {
            display: block;
            padding: 0.5rem 0.9rem;
            border-radius: 30px;
            font-size: 0.88rem;
            font-weight: 500;
            color: #1a2a3a;
            background: transparent;
            transition: background 0.2s, color 0.2s;
        }
        .nav-list li a:hover {
            background: #004e92;
            color: #fff;
            text-decoration: none;
        }
        .nav-list li a.active {
            background: #eef2f7;
            color: #004e92;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 1.8rem;
            color: #1a2a3a;
            cursor: pointer;
            padding: 0.2rem 0.4rem;
            border-radius: 8px;
            transition: background 0.2s;
        }
        .hamburger:hover {
            background: #eef2f7;
        }
        @media (max-width: 800px) {
            .hamburger {
                display: block;
            }
            .nav-list {
                display: none;
                flex-direction: column;
                width: 100%;
                background: #ffffff;
                padding: 1rem 0 0.5rem;
                border-top: 1px solid #eef2f7;
                margin-top: 0.8rem;
                gap: 0;
            }
            .nav-list.open {
                display: flex;
            }
            .nav-list li a {
                padding: 0.7rem 1rem;
                border-radius: 8px;
            }
            .nav-wrapper {
                flex-wrap: wrap;
            }
        }
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            padding: 0.8rem 0 0.2rem;
            margin: 0 0 0.5rem;
            font-size: 0.82rem;
            color: #6b7a8f;
            gap: 0.3rem;
        }
        .breadcrumb li+li::before {
            content: "›";
            padding: 0 0.5rem;
            color: #b0c0d0;
        }
        .breadcrumb a {
            color: #6b7a8f;
        }
        .breadcrumb a:hover {
            color: #004e92;
        }
        .breadcrumb .current {
            color: #1a2a3a;
            font-weight: 500;
        }
        .search-box {
            display: flex;
            max-width: 520px;
            margin: 1.2rem 0 1.8rem;
            border-radius: 50px;
            overflow: hidden;
            border: 1px solid #d0dae8;
            background: #f8f9fc;
            transition: box-shadow 0.2s;
        }
        .search-box:focus-within {
            box-shadow: 0 0 0 3px rgba(0, 78, 146, 0.15);
            border-color: #004e92;
        }
        .search-box input {
            flex: 1;
            border: none;
            padding: 0.8rem 1.2rem;
            font-size: 0.95rem;
            background: transparent;
            outline: none;
            color: #1a2a3a;
        }
        .search-box input::placeholder {
            color: #8a9bb0;
        }
        .search-box button {
            background: #004e92;
            border: none;
            padding: 0 1.3rem;
            color: #fff;
            font-size: 1rem;
            cursor: pointer;
            transition: background 0.2s;
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }
        .search-box button:hover {
            background: #0b1a2e;
        }
        .feature-image {
            margin: 1.8rem 0 2rem;
            border-radius: 14px;
            overflow: hidden;
            background: #eef2f7;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
        }
        .feature-image img {
            width: 100%;
            max-height: 420px;
            object-fit: cover;
        }
        .feature-image figcaption {
            padding: 0.8rem 1.2rem;
            font-size: 0.85rem;
            color: #5a6a7e;
            background: #f4f6fa;
            font-style: italic;
        }
        .interaction-area {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1.8rem;
            margin: 2.5rem 0 1.5rem;
            padding: 1.8rem 1.8rem 2rem;
            background: #f4f6fa;
            border-radius: 18px;
            border: 1px solid #e4eaf2;
        }
        .interaction-area h3 {
            margin-top: 0;
            font-size: 1.2rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .interaction-area form {
            display: flex;
            flex-direction: column;
            gap: 0.8rem;
        }
        .interaction-area textarea,
        .interaction-area input,
        .interaction-area select {
            padding: 0.7rem 1rem;
            border-radius: 10px;
            border: 1px solid #d0dae8;
            font-size: 0.92rem;
            font-family: inherit;
            background: #fff;
            transition: border-color 0.2s;
        }
        .interaction-area textarea:focus,
        .interaction-area input:focus,
        .interaction-area select:focus {
            border-color: #004e92;
            outline: none;
            box-shadow: 0 0 0 2px rgba(0, 78, 146, 0.1);
        }
        .interaction-area textarea {
            min-height: 80px;
            resize: vertical;
        }
        .interaction-area .btn {
            background: #004e92;
            color: #fff;
            border: none;
            padding: 0.7rem 1.5rem;
            border-radius: 30px;
            font-weight: 600;
            font-size: 0.92rem;
            cursor: pointer;
            transition: background 0.2s, transform 0.1s;
            align-self: flex-start;
        }
        .interaction-area .btn:hover {
            background: #0b1a2e;
            transform: scale(1.02);
        }
        .star-rating {
            display: flex;
            gap: 0.3rem;
            font-size: 1.6rem;
            color: #d0dae8;
            cursor: pointer;
            direction: rtl;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            transition: color 0.2s;
            color: #d0dae8;
        }
        .star-rating label:hover,
        .star-rating label:hover~label,
        .star-rating input:checked~label {
            color: #ffb400;
        }
        @media (max-width: 640px) {
            .interaction-area {
                grid-template-columns: 1fr;
                gap: 1.5rem;
                padding: 1.2rem;
            }
        }
        friend-link {
            display: block;
            padding: 1.2rem 0 0.8rem;
            border-top: 2px solid #eef2f7;
            margin-top: 2rem;
        }
        friend-link h4 {
            font-size: 1rem;
            margin-top: 0;
            margin-bottom: 0.6rem;
            color: #4a5a6e;
        }
        friend-link ul {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-wrap: wrap;
            gap: 0.4rem 1.2rem;
        }
        friend-link li a {
            font-size: 0.88rem;
            color: #4a5a6e;
        }
        friend-link li a:hover {
            color: #004e92;
        }
        .site-footer {
            margin-top: 1.8rem;
            padding-top: 1.2rem;
            border-top: 1px solid #e4eaf2;
            font-size: 0.85rem;
            color: #6b7a8f;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 0.8rem;
        }
        .site-footer .copy {
            font-weight: 400;
        }
        .site-footer .copy strong {
            color: #1a2a3a;
        }
        .highlight-box {
            background: #eef5fb;
            border-left: 4px solid #004e92;
            padding: 1.2rem 1.5rem;
            border-radius: 0 12px 12px 0;
            margin: 1.5rem 0;
        }
        .stat-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
            gap: 1rem;
            margin: 1.5rem 0;
        }
        .stat-card {
            background: #f8f9fc;
            padding: 1rem 1.2rem;
            border-radius: 12px;
            text-align: center;
            border: 1px solid #e4eaf2;
        }
        .stat-card .number {
            font-size: 1.8rem;
            font-weight: 800;
            color: #004e92;
            display: block;
        }
        .stat-card .label {
            font-size: 0.82rem;
            color: #5a6a7e;
        }
        .table-wrap {
            overflow-x: auto;
            margin: 1.5rem 0;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.92rem;
            background: #fff;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.04);
        }
        th,
        td {
            padding: 0.7rem 1rem;
            text-align: left;
            border-bottom: 1px solid #eef2f7;
        }
        th {
            background: #eef5fb;
            font-weight: 600;
            color: #0b1a2e;
        }
        tr:last-child td {
            border-bottom: none;
        }
        .tag {
            display: inline-block;
            padding: 0.2rem 0.8rem;
            border-radius: 20px;
            font-size: 0.75rem;
            font-weight: 600;
            background: #eef5fb;
            color: #004e92;
        }
        .tag.updated {
            background: #e6f7e6;
            color: #1a7a1a;
        }
        .last-updated {
            font-size: 0.82rem;
            color: #8a9bb0;
            display: flex;
            align-items: center;
            gap: 0.4rem;
            margin-bottom: 0.8rem;
        }
        .last-updated i {
            color: #004e92;
        }
        .toc {
            background: #f4f6fa;
            padding: 1.2rem 1.8rem 1.2rem;
            border-radius: 14px;
            margin: 1.5rem 0 2rem;
            border: 1px solid #e4eaf2;
        }
        .toc h3 {
            margin-top: 0;
        }
        .toc ol {
            margin: 0.5rem 0 0;
            padding-left: 1.5rem;
        }
        .toc a {
            color: #2d3748;
        }
        .toc a:hover {
            color: #004e92;
        }
        @media (max-width: 480px) {
            .stat-grid {
                grid-template-columns: 1fr 1fr;
            }
            .site-footer {
                flex-direction: column;
                text-align: center;
            }
        }