*,
        *::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, BlinkMacSystemFont, 'Helvetica Neue', sans-serif;
            background: #f8f9fc;
            color: #1e293b;
            line-height: 1.7;
            padding: 0 1rem;
        }
        a {
            color: #0f4c81;
            text-decoration: none;
            transition: color 0.2s;
        }
        a:hover {
            color: #e67e22;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 12px;
        }
        ul,
        ol {
            padding-left: 1.5rem;
        }
        li {
            margin-bottom: 0.4rem;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            background: #ffffff;
            box-shadow: 0 0 40px rgba(0, 0, 0, 0.04);
            border-radius: 20px;
            padding: 1.2rem 1.8rem;
        }
        .site-header {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            padding: 1rem 0 0.6rem 0;
            border-bottom: 2px solid #e9edf4;
            position: relative;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            background: linear-gradient(135deg, #0f4c81, #e67e22);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            display: inline-flex;
            align-items: center;
            gap: 0.3rem;
        }
        .my-logo i {
            background: none;
            -webkit-text-fill-color: #0f4c81;
            font-size: 2rem;
        }
        .my-logo:hover {
            opacity: 0.85;
            text-decoration: none;
        }
        .nav-bar {
            display: flex;
            align-items: center;
            gap: 0.2rem;
        }
        .nav-list {
            display: flex;
            list-style: none;
            gap: 0.1rem;
            padding: 0;
            flex-wrap: wrap;
        }
        .nav-list li a {
            display: block;
            padding: 0.6rem 1.2rem;
            border-radius: 40px;
            font-weight: 500;
            font-size: 0.95rem;
            color: #1e293b;
            transition: all 0.2s;
        }
        .nav-list li a:hover {
            background: #eef2f9;
            color: #0f4c81;
            text-decoration: none;
        }
        .nav-list li a.active {
            background: #0f4c81;
            color: #fff;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 0.3rem 0.6rem;
            color: #1e293b;
            border-radius: 8px;
            transition: background 0.2s;
        }
        .hamburger:hover {
            background: #eef2f9;
        }
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            padding: 0.7rem 0 0.2rem 0;
            gap: 0.3rem 0.6rem;
            font-size: 0.9rem;
            color: #5b6f82;
        }
        .breadcrumb li+li::before {
            content: "›";
            padding-right: 0.6rem;
            color: #a0b3c9;
            font-weight: 600;
        }
        .breadcrumb a {
            color: #0f4c81;
        }
        .breadcrumb .current {
            color: #5b6f82;
            font-weight: 500;
        }
        .hero {
            padding: 2rem 0 1.5rem 0;
            text-align: center;
        }
        .hero h1 {
            font-size: 2.8rem;
            font-weight: 800;
            line-height: 1.2;
            color: #0f4c81;
            margin-bottom: 0.6rem;
        }
        .hero h1 i {
            color: #e67e22;
            margin-right: 0.4rem;
        }
        .hero p {
            font-size: 1.2rem;
            color: #2c3e50;
            max-width: 800px;
            margin: 0 auto 1.2rem auto;
        }
        .hero .badge {
            display: inline-block;
            background: #e67e22;
            color: #fff;
            padding: 0.3rem 1.4rem;
            border-radius: 40px;
            font-weight: 600;
            font-size: 0.95rem;
        }
        .hero .badge i {
            margin-right: 0.4rem;
        }
        section {
            padding: 2rem 0;
            border-bottom: 1px solid #eef2f7;
        }
        section:last-of-type {
            border-bottom: none;
        }
        h2 {
            font-size: 2rem;
            font-weight: 700;
            color: #0f4c81;
            margin: 2rem 0 1rem 0;
            padding-bottom: 0.4rem;
            border-bottom: 3px solid #eef2f7;
        }
        h2 i {
            color: #e67e22;
            margin-right: 0.5rem;
        }
        h3 {
            font-size: 1.5rem;
            font-weight: 600;
            color: #1e3a5f;
            margin: 1.8rem 0 0.8rem 0;
        }
        h3 i {
            margin-right: 0.4rem;
            color: #e67e22;
        }
        h4 {
            font-size: 1.2rem;
            font-weight: 600;
            color: #2c3e50;
            margin: 1.2rem 0 0.5rem 0;
        }
        p {
            margin-bottom: 1.1rem;
            font-size: 1.05rem;
            color: #2d3e55;
        }
        .text-muted {
            color: #5b6f82;
            font-size: 0.95rem;
        }
        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 1.8rem;
            margin: 1.5rem 0;
        }
        .feature-card {
            background: #f8faff;
            padding: 1.6rem 1.4rem;
            border-radius: 16px;
            border-left: 5px solid #e67e22;
            transition: transform 0.15s, box-shadow 0.2s;
        }
        .feature-card:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 28px rgba(0, 0, 0, 0.05);
        }
        .feature-card i {
            font-size: 2rem;
            color: #0f4c81;
            margin-bottom: 0.6rem;
        }
        .feature-card h4 {
            margin-top: 0;
        }
        .table-wrap {
            overflow-x: auto;
            margin: 1.5rem 0;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.98rem;
        }
        th,
        td {
            padding: 0.8rem 1rem;
            text-align: left;
            border-bottom: 1px solid #e2e8f0;
        }
        th {
            background: #0f4c81;
            color: #fff;
            font-weight: 600;
        }
        tr:nth-child(even) {
            background: #f8faff;
        }
        tr:hover td {
            background: #eef5ff;
        }
        .interactive-modules {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 2rem;
            margin: 2rem 0;
        }
        .module-box {
            background: #f8faff;
            border-radius: 16px;
            padding: 1.8rem 1.5rem;
            border: 1px solid #e6ecf5;
        }
        .module-box h3 {
            margin-top: 0;
            font-size: 1.3rem;
        }
        .module-box form {
            display: flex;
            flex-direction: column;
            gap: 0.8rem;
            margin-top: 0.8rem;
        }
        .module-box input,
        .module-box textarea,
        .module-box select {
            padding: 0.7rem 1rem;
            border: 1px solid #cfdbe8;
            border-radius: 10px;
            font-size: 1rem;
            font-family: inherit;
            background: #fff;
            transition: border 0.2s;
        }
        .module-box input:focus,
        .module-box textarea:focus,
        .module-box select:focus {
            border-color: #0f4c81;
            outline: none;
            box-shadow: 0 0 0 3px rgba(15, 76, 129, 0.12);
        }
        .module-box textarea {
            min-height: 80px;
            resize: vertical;
        }
        .btn {
            padding: 0.7rem 1.6rem;
            border: none;
            border-radius: 40px;
            font-weight: 600;
            font-size: 0.95rem;
            cursor: pointer;
            transition: all 0.2s;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            background: #0f4c81;
            color: #fff;
        }
        .btn:hover {
            background: #1a5f9e;
            transform: translateY(-1px);
        }
        .btn-secondary {
            background: #e67e22;
        }
        .btn-secondary:hover {
            background: #d06c12;
        }
        .star-rating {
            display: flex;
            flex-direction: row-reverse;
            justify-content: flex-end;
            gap: 0.2rem;
            font-size: 1.8rem;
            margin: 0.4rem 0;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            cursor: pointer;
            color: #cfdbe8;
            transition: color 0.15s;
        }
        .star-rating label:hover,
        .star-rating label:hover~label,
        .star-rating input:checked~label {
            color: #f1c40f;
        }
        .img-wrap {
            margin: 2rem 0;
            border-radius: 16px;
            overflow: hidden;
            background: #eef2f7;
            text-align: center;
        }
        .img-wrap figcaption {
            padding: 0.8rem 1rem;
            font-size: 0.9rem;
            color: #5b6f82;
            background: #f8faff;
            font-style: italic;
        }
        .site-footer {
            padding: 2.2rem 0 1.2rem 0;
            border-top: 2px solid #e9edf4;
            margin-top: 1rem;
        }
        .footer-flex {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 2rem;
        }
        .footer-col {
            flex: 1 1 200px;
        }
        .footer-col h4 {
            color: #0f4c81;
            margin-bottom: 0.8rem;
            font-size: 1.1rem;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
        }
        .footer-col ul li {
            margin-bottom: 0.3rem;
        }
        .footer-col ul li a {
            color: #2c3e50;
            font-size: 0.95rem;
        }
        .footer-col ul li a:hover {
            color: #e67e22;
        }
        .friend-link {
            display: flex;
            flex-wrap: wrap;
            gap: 0.8rem 1.6rem;
            padding: 1rem 0;
            margin: 1rem 0 0.4rem 0;
            border-top: 1px solid #eef2f7;
            font-size: 0.95rem;
        }
        .friend-link a {
            color: #0f4c81;
            font-weight: 500;
        }
        .friend-link a:hover {
            color: #e67e22;
        }
        .copyright {
            text-align: center;
            padding-top: 1.2rem;
            font-size: 0.9rem;
            color: #6b7f94;
            border-top: 1px solid #eef2f7;
            margin-top: 1rem;
        }
        .copyright strong {
            color: #0f4c81;
        }
        .last-updated {
            display: inline-block;
            background: #eef2f7;
            padding: 0.2rem 1rem;
            border-radius: 30px;
            font-size: 0.85rem;
            color: #4a5f77;
            margin-top: 0.5rem;
        }
        @media (max-width: 900px) {
            .container {
                padding: 1rem;
            }
            .hero h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.6rem;
            }
            .nav-list {
                display: none;
                flex-direction: column;
                width: 100%;
                background: #fff;
                padding: 1rem 0;
                border-radius: 16px;
                box-shadow: 0 8px 30px rgba(0, 0, 0, 0.06);
                position: absolute;
                top: 100%;
                left: 0;
                z-index: 99;
            }
            .nav-list.open {
                display: flex;
            }
            .nav-list li a {
                padding: 0.8rem 1.5rem;
                border-radius: 0;
            }
            .hamburger {
                display: block;
            }
            .site-header {
                position: relative;
            }
            .features-grid {
                grid-template-columns: 1fr;
            }
            .interactive-modules {
                grid-template-columns: 1fr;
            }
            .footer-flex {
                flex-direction: column;
            }
        }
        @media (max-width: 480px) {
            body {
                padding: 0 0.4rem;
            }
            .container {
                padding: 0.8rem;
                border-radius: 12px;
            }
            .hero h1 {
                font-size: 1.8rem;
            }
            .my-logo {
                font-size: 1.7rem;
            }
            .breadcrumb {
                font-size: 0.8rem;
            }
            p {
                font-size: 0.98rem;
            }
        }
        .highlight {
            background: #fef9e7;
            padding: 0.1rem 0.3rem;
            border-radius: 4px;
            font-weight: 600;
        }
        .emoji-lg {
            font-size: 1.4rem;
        }
        .gap-1 {
            gap: 1rem;
        }
        .mt-1 {
            margin-top: 1rem;
        }
        .mb-1 {
            margin-bottom: 1rem;
        }
        .flex-center {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            flex-wrap: wrap;
        }
        .d-none {
            display: none;
        }
        @media (max-width: 900px) {
            .d-none-mob {
                display: none;
            }
        }
        .schema-hidden {
            display: none;
        }