*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            background: #f8f9fc;
            color: #1e1e2f;
            line-height: 1.7;
            padding: 0;
        }
        a {
            color: #0f4c81;
            text-decoration: none;
            transition: color .2s;
        }
        a:hover {
            color: #e84057;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 12px;
        }
        ul,
        ol {
            padding-left: 1.6rem;
            margin: 1rem 0;
        }
        li {
            margin-bottom: 0.4rem;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.3;
            color: #0b1a2e;
            margin-top: 2rem;
            margin-bottom: 0.8rem;
        }
        h1 {
            font-size: 2.2rem;
            border-left: 6px solid #e84057;
            padding-left: 1rem;
        }
        h2 {
            font-size: 1.7rem;
            border-bottom: 2px solid #e0e7ef;
            padding-bottom: 0.5rem;
        }
        h3 {
            font-size: 1.3rem;
            color: #1f3a5f;
        }
        h4 {
            font-size: 1.1rem;
            color: #2c4c6e;
        }
        p {
            margin: 1rem 0;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: linear-gradient(135deg, #0b1a2e 0%, #1a2f4a 100%);
            padding: 1rem 0;
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            color: #fff;
            text-transform: uppercase;
            background: linear-gradient(135deg, #f5a623, #e84057);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            transition: opacity .3s;
        }
        .my-logo:hover {
            opacity: 0.85;
            text-decoration: none;
        }
        .my-logo small {
            font-size: 0.8rem;
            display: block;
            -webkit-text-fill-color: #b0c4de;
            color: #b0c4de;
            letter-spacing: 2px;
            font-weight: 400;
        }
        .nav-bar {
            display: flex;
            align-items: center;
            gap: 1.2rem;
        }
        .nav-list {
            display: flex;
            list-style: none;
            gap: 1.2rem;
            padding: 0;
            margin: 0;
        }
        .nav-list a {
            color: #e8edf3;
            font-weight: 600;
            font-size: 0.95rem;
            padding: 0.3rem 0;
            position: relative;
        }
        .nav-list a::after {
            content: '';
            display: block;
            height: 2px;
            background: #e84057;
            width: 0;
            transition: width .3s;
        }
        .nav-list a:hover::after {
            width: 100%;
        }
        .nav-list a:hover {
            color: #fff;
            text-decoration: none;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 1.8rem;
            color: #fff;
            cursor: pointer;
            padding: 0.2rem 0.5rem;
        }
        .nav-toggle {
            display: none;
        }
        .breadcrumb {
            background: #eef2f7;
            padding: 0.6rem 0;
            font-size: 0.85rem;
            border-bottom: 1px solid #dce3ec;
        }
        .breadcrumb ol {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 0.3rem 0.8rem;
            padding: 0;
            margin: 0;
        }
        .breadcrumb li+li::before {
            content: "›";
            margin-right: 0.6rem;
            color: #7a8ba8;
        }
        .breadcrumb a {
            color: #0f4c81;
        }
        .breadcrumb .current {
            color: #5a6e85;
            font-weight: 600;
        }
        .content-wrapper {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2.5rem;
            padding: 2rem 0;
        }
        .main-content {
            min-width: 0;
        }
        .sidebar {
            position: sticky;
            top: 100px;
            align-self: start;
        }
        .sidebar-card {
            background: #fff;
            border-radius: 16px;
            padding: 1.5rem;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
            margin-bottom: 1.5rem;
        }
        .sidebar-card h3 {
            font-size: 1.1rem;
            margin-top: 0;
            border-left: 4px solid #e84057;
            padding-left: 0.8rem;
        }
        .sidebar-card ul {
            list-style: none;
            padding: 0;
            margin: 0.8rem 0 0;
        }
        .sidebar-card li {
            padding: 0.4rem 0;
            border-bottom: 1px solid #f0f3f8;
        }
        .sidebar-card li:last-child {
            border-bottom: none;
        }
        .sidebar-card a {
            font-weight: 500;
        }
        .data-table {
            width: 100%;
            border-collapse: collapse;
            background: #fff;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
            margin: 1.5rem 0;
        }
        .data-table th {
            background: #0b1a2e;
            color: #fff;
            padding: 0.9rem 1.2rem;
            text-align: left;
            font-weight: 600;
        }
        .data-table td {
            padding: 0.8rem 1.2rem;
            border-bottom: 1px solid #eef2f7;
        }
        .data-table tr:last-child td {
            border-bottom: none;
        }
        .data-table tr:hover td {
            background: #f4f7fc;
        }
        .feature-image {
            margin: 2rem 0;
            border-radius: 16px;
            background: #eef2f7;
            overflow: hidden;
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
        }
        .feature-image img {
            width: 100%;
            height: auto;
            display: block;
        }
        .feature-image figcaption {
            padding: 0.8rem 1.2rem;
            font-size: 0.85rem;
            color: #4a5e7a;
            background: #fff;
            border-top: 1px solid #e0e7ef;
        }
        .form-card {
            background: #fff;
            border-radius: 16px;
            padding: 2rem;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
            margin: 2rem 0;
        }
        .form-card h3 {
            margin-top: 0;
            display: flex;
            align-items: center;
            gap: 0.6rem;
        }
        .input-group {
            display: flex;
            flex-wrap: wrap;
            gap: 0.8rem;
            margin: 1rem 0;
        }
        .input-group input,
        .input-group textarea,
        .input-group select {
            flex: 1 1 200px;
            padding: 0.8rem 1.2rem;
            border: 2px solid #e0e7ef;
            border-radius: 10px;
            font-size: 0.95rem;
            background: #fafcff;
            transition: border .3s;
        }
        .input-group input:focus,
        .input-group textarea:focus,
        .input-group select:focus {
            border-color: #0f4c81;
            outline: none;
            background: #fff;
        }
        .input-group textarea {
            min-height: 100px;
            width: 100%;
            flex-basis: 100%;
        }
        .btn {
            padding: 0.7rem 2rem;
            border: none;
            border-radius: 10px;
            font-weight: 700;
            font-size: 1rem;
            cursor: pointer;
            transition: all .3s;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
        }
        .btn-primary {
            background: #0f4c81;
            color: #fff;
        }
        .btn-primary:hover {
            background: #0a375c;
            transform: translateY(-2px);
            box-shadow: 0 6px 16px rgba(15, 76, 129, 0.3);
        }
        .btn-danger {
            background: #e84057;
            color: #fff;
        }
        .btn-danger:hover {
            background: #c92a40;
            transform: translateY(-2px);
        }
        .btn-success {
            background: #1f8b4c;
            color: #fff;
        }
        .btn-success:hover {
            background: #156b39;
            transform: translateY(-2px);
        }
        .star-rating {
            display: flex;
            gap: 0.3rem;
            font-size: 1.8rem;
            cursor: pointer;
            direction: rtl;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            color: #d4d9e2;
            transition: color .2s;
        }
        .star-rating label:hover,
        .star-rating label:hover~label,
        .star-rating input:checked~label {
            color: #f5a623;
        }
        .site-footer {
            background: #0b1a2e;
            color: #b0c4de;
            padding: 2.5rem 0 1.5rem;
            margin-top: 3rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 2rem;
        }
        .footer-grid h4 {
            color: #fff;
            margin-top: 0;
            font-size: 1.1rem;
        }
        .footer-grid a {
            color: #b0c4de;
            display: block;
            padding: 0.2rem 0;
        }
        .footer-grid a:hover {
            color: #fff;
        }
        friend-link {
            display: block;
            padding: 0.6rem 0;
        }
        friend-link a {
            display: inline-block;
            margin-right: 1.2rem;
            padding: 0.2rem 0;
        }
        .copyright {
            border-top: 1px solid #1f3a5f;
            padding-top: 1.5rem;
            margin-top: 1.5rem;
            text-align: center;
            font-size: 0.9rem;
        }
        .highlight-box {
            background: linear-gradient(135deg, #fef9e7, #fef3e0);
            border-left: 6px solid #f5a623;
            padding: 1.5rem 2rem;
            border-radius: 12px;
            margin: 1.5rem 0;
        }
        .highlight-box strong {
            color: #b45309;
        }
        .tip-box {
            background: #e7f3ff;
            border-left: 6px solid #0f4c81;
            padding: 1.2rem 1.8rem;
            border-radius: 12px;
            margin: 1.5rem 0;
        }
        .stat-badge {
            display: inline-block;
            background: #e84057;
            color: #fff;
            padding: 0.2rem 1rem;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 700;
            letter-spacing: 0.5px;
        }
        @media (max-width: 992px) {
            .content-wrapper {
                grid-template-columns: 1fr;
            }
            .sidebar {
                position: static;
                order: 2;
            }
            .main-content {
                order: 1;
            }
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
            .nav-list {
                display: none;
                flex-direction: column;
                background: #0b1a2e;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                padding: 1rem 2rem;
                border-top: 2px solid #1f3a5f;
                box-shadow: 0 12px 30px rgba(0, 0, 0, 0.3);
            }
            .nav-list a {
                padding: 0.6rem 0;
                font-size: 1.05rem;
            }
            .nav-toggle:checked~.nav-list {
                display: flex;
            }
            .header-inner {
                position: relative;
            }
            h1 {
                font-size: 1.7rem;
            }
            h2 {
                font-size: 1.4rem;
            }
            .data-table {
                font-size: 0.85rem;
            }
            .data-table th,
            .data-table td {
                padding: 0.6rem 0.8rem;
            }
            .form-card {
                padding: 1.2rem;
            }
            .feature-image {
                margin: 1.2rem 0;
            }
            .star-rating {
                font-size: 1.5rem;
            }
        }
        @media (max-width: 480px) {
            .container {
                padding: 0 12px;
            }
            .my-logo {
                font-size: 1.4rem;
            }
            .input-group {
                flex-direction: column;
            }
            .input-group input,
            .input-group textarea,
            .input-group select {
                flex-basis: auto;
                width: 100%;
            }
            .btn {
                width: 100%;
                justify-content: center;
            }
            .breadcrumb ol {
                font-size: 0.75rem;
                gap: 0.2rem 0.4rem;
            }
        }
        @media print {
            .site-header,
            .breadcrumb,
            .sidebar,
            .form-card,
            .site-footer {
                display: none;
            }
            .content-wrapper {
                display: block;
            }
            h1 {
                font-size: 1.8rem;
            }
            body {
                font-size: 12pt;
                line-height: 1.5;
            }
        }