*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        :root {
            --primary: #0f1b2d;
            --secondary: #1e3a5f;
            --accent: #f5a623;
            --accent2: #e84c3d;
            --light: #f4f7fa;
            --text: #1a2332;
            --text-light: #5a6a7e;
            --white: #ffffff;
            --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
            --radius: 12px;
            --transition: 0.3s ease;
            --max-width: 1200px;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
            background: var(--light);
            color: var(--text);
            line-height: 1.7;
            padding-top: 70px;
        }
        a {
            color: var(--secondary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--accent);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius);
        }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            background: var(--primary);
            box-shadow: 0 2px 16px rgba(0, 0, 0, 0.3);
            z-index: 1000;
            padding: 0 20px;
        }
        .header-inner {
            max-width: var(--max-width);
            margin: 0 auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 70px;
        }
        .my-logo {
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--white);
            letter-spacing: -0.5px;
            display: flex;
            align-items: center;
            gap: 8px;
            transition: var(--transition);
        }
        .my-logo:hover {
            color: var(--accent);
        }
        .my-logo i {
            color: var(--accent);
            font-size: 1.4rem;
        }
        .my-logo span {
            font-weight: 300;
            color: var(--accent);
        }
        nav {
            display: flex;
            align-items: center;
            gap: 28px;
        }
        .nav-link {
            color: rgba(255, 255, 255, 0.85);
            font-weight: 500;
            font-size: 0.92rem;
            transition: var(--transition);
            position: relative;
        }
        .nav-link::after {
            content: '';
            position: absolute;
            bottom: -4px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--accent);
            transition: var(--transition);
        }
        .nav-link:hover::after {
            width: 100%;
        }
        .nav-link:hover {
            color: var(--accent);
        }
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            background: none;
            border: none;
            padding: 4px;
        }
        .hamburger span {
            display: block;
            width: 26px;
            height: 3px;
            background: var(--white);
            border-radius: 4px;
            transition: var(--transition);
        }
        .hamburger.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 6px);
        }
        .hamburger.active span:nth-child(2) {
            opacity: 0;
        }
        .hamburger.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -6px);
        }
        .mobile-nav {
            display: none;
            position: fixed;
            top: 70px;
            left: 0;
            width: 100%;
            background: var(--primary);
            padding: 20px 24px 30px;
            flex-direction: column;
            gap: 18px;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3);
            z-index: 999;
        }
        .mobile-nav.open {
            display: flex;
        }
        .mobile-nav .nav-link {
            font-size: 1.1rem;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            padding-bottom: 10px;
        }
        .breadcrumb {
            background: var(--white);
            padding: 14px 0;
            border-bottom: 1px solid #e9edf2;
        }
        .breadcrumb-list {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 6px 12px;
            font-size: 0.85rem;
            color: var(--text-light);
        }
        .breadcrumb-list li+li::before {
            content: '›';
            margin-right: 12px;
            color: #b0bec5;
            font-weight: 600;
        }
        .breadcrumb-list a {
            color: var(--secondary);
        }
        .breadcrumb-list a:hover {
            color: var(--accent);
        }
        .breadcrumb-list .current {
            color: var(--text-light);
            font-weight: 500;
        }
        .page-wrap {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
            padding: 40px 0 60px;
        }
        .main-content {
            min-width: 0;
        }
        .sidebar {
            position: sticky;
            top: 100px;
            align-self: start;
        }
        h1 {
            font-size: 2.6rem;
            font-weight: 800;
            line-height: 1.2;
            color: var(--primary);
            margin-bottom: 12px;
            letter-spacing: -0.5px;
        }
        h1 i {
            color: var(--accent);
        }
        .sub-title {
            font-size: 1.15rem;
            color: var(--text-light);
            margin-bottom: 28px;
            border-left: 4px solid var(--accent);
            padding-left: 18px;
        }
        h2 {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--primary);
            margin: 48px 0 18px;
            padding-bottom: 8px;
            border-bottom: 3px solid var(--accent);
            display: inline-block;
        }
        h3 {
            font-size: 1.35rem;
            font-weight: 600;
            color: var(--secondary);
            margin: 32px 0 12px;
        }
        h4 {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--text);
            margin: 24px 0 8px;
        }
        p {
            margin-bottom: 18px;
            color: var(--text);
        }
        .highlight {
            background: #fef3d9;
            padding: 2px 8px;
            border-radius: 4px;
            font-weight: 600;
        }
        .badge {
            display: inline-block;
            background: var(--accent);
            color: var(--primary);
            font-weight: 700;
            font-size: 0.75rem;
            padding: 2px 12px;
            border-radius: 20px;
            letter-spacing: 0.3px;
        }
        .info-box {
            background: var(--white);
            border-radius: var(--radius);
            padding: 28px 30px;
            box-shadow: var(--shadow);
            margin: 28px 0;
            border-left: 5px solid var(--accent);
        }
        .info-box.success {
            border-left-color: #27ae60;
        }
        .info-box.warning {
            border-left-color: var(--accent2);
        }
        .info-box h4 {
            margin-top: 0;
        }
        .steps-list {
            list-style: none;
            counter-reset: step;
            margin: 20px 0;
        }
        .steps-list li {
            counter-increment: step;
            padding: 12px 0 12px 44px;
            position: relative;
            border-bottom: 1px solid #eef2f6;
        }
        .steps-list li::before {
            content: counter(step);
            position: absolute;
            left: 0;
            top: 12px;
            width: 30px;
            height: 30px;
            background: var(--accent);
            color: var(--primary);
            font-weight: 700;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.9rem;
        }
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 20px;
            margin: 24px 0;
        }
        .feature-card {
            background: var(--white);
            padding: 24px 18px;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            text-align: center;
            transition: var(--transition);
            border: 1px solid transparent;
        }
        .feature-card:hover {
            border-color: var(--accent);
            transform: translateY(-4px);
        }
        .feature-card i {
            font-size: 2rem;
            color: var(--accent);
            margin-bottom: 12px;
        }
        .feature-card h4 {
            margin: 0 0 6px;
        }
        .feature-card p {
            font-size: 0.92rem;
            color: var(--text-light);
            margin: 0;
        }
        .table-wrap {
            overflow-x: auto;
            margin: 28px 0;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
        }
        table {
            width: 100%;
            border-collapse: collapse;
            background: var(--white);
            font-size: 0.95rem;
        }
        th {
            background: var(--primary);
            color: var(--white);
            font-weight: 600;
            padding: 14px 18px;
            text-align: left;
        }
        td {
            padding: 12px 18px;
            border-bottom: 1px solid #eef2f6;
        }
        tr:hover td {
            background: #f8fafc;
        }
        .form-card {
            background: var(--white);
            border-radius: var(--radius);
            padding: 30px 32px;
            box-shadow: var(--shadow);
            margin: 28px 0;
        }
        .form-card h3 {
            margin-top: 0;
        }
        .form-group {
            margin-bottom: 18px;
        }
        .form-group label {
            display: block;
            font-weight: 600;
            font-size: 0.9rem;
            margin-bottom: 4px;
            color: var(--text);
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 12px 16px;
            border: 1.5px solid #dce3ec;
            border-radius: 8px;
            font-size: 1rem;
            font-family: inherit;
            transition: var(--transition);
            background: #f9fbfd;
        }
        .form-group input:focus,
        .form-group textarea:focus {
            outline: none;
            border-color: var(--accent);
            box-shadow: 0 0 0 3px rgba(245, 166, 35, 0.15);
        }
        .form-group textarea {
            min-height: 100px;
            resize: vertical;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 30px;
            background: var(--accent);
            color: var(--primary);
            font-weight: 700;
            font-size: 1rem;
            border: none;
            border-radius: 8px;
            cursor: pointer;
            transition: var(--transition);
        }
        .btn:hover {
            background: #e69516;
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(245, 166, 35, 0.3);
        }
        .btn-outline {
            background: transparent;
            border: 2px solid var(--secondary);
            color: var(--secondary);
        }
        .btn-outline:hover {
            background: var(--secondary);
            color: var(--white);
        }
        .star-rating {
            display: flex;
            flex-direction: row-reverse;
            gap: 4px;
            justify-content: flex-end;
            margin: 8px 0 16px;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            font-size: 1.8rem;
            color: #dce3ec;
            cursor: pointer;
            transition: var(--transition);
        }
        .star-rating label:hover,
        .star-rating label:hover~label,
        .star-rating input:checked~label {
            color: var(--accent);
        }
        .sidebar-card {
            background: var(--white);
            border-radius: var(--radius);
            padding: 24px;
            box-shadow: var(--shadow);
            margin-bottom: 24px;
        }
        .sidebar-card h4 {
            margin-top: 0;
            font-size: 1.1rem;
            border-bottom: 2px solid var(--accent);
            padding-bottom: 8px;
            display: inline-block;
        }
        .link-list {
            list-style: none;
            margin-top: 12px;
        }
        .link-list li {
            padding: 6px 0;
            border-bottom: 1px solid #f0f3f7;
        }
        .link-list a {
            font-weight: 500;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .link-list a i {
            color: var(--accent);
            font-size: 0.8rem;
        }
        .img-wrapper {
            margin: 32px 0;
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            background: var(--white);
            padding: 8px;
        }
        .img-wrapper img {
            border-radius: 8px;
            width: 100%;
            object-fit: cover;
        }
        .img-caption {
            font-size: 0.85rem;
            color: var(--text-light);
            text-align: center;
            padding: 10px 0 4px;
            font-style: italic;
        }
        friend-link {
            display: block;
            background: var(--white);
            border-radius: var(--radius);
            padding: 24px 28px;
            box-shadow: var(--shadow);
            margin: 20px 0;
        }
        friend-link::before {
            content: '🔗 🤝 Friends & Resources';
            display: block;
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 14px;
            border-bottom: 2px solid var(--accent);
            padding-bottom: 8px;
        }
        .friend-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
            gap: 12px 20px;
        }
        .friend-grid a {
            color: var(--secondary);
            font-weight: 500;
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 4px 0;
        }
        .friend-grid a i {
            color: var(--accent);
            font-size: 0.8rem;
        }
        footer {
            background: var(--primary);
            color: rgba(255, 255, 255, 0.8);
            padding: 36px 0 28px;
            margin-top: 20px;
        }
        footer .container {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
        }
        footer .copyright {
            font-size: 0.88rem;
            opacity: 0.8;
        }
        footer .copyright strong {
            color: var(--accent);
        }
        @media (max-width: 1024px) {
            .page-wrap {
                grid-template-columns: 1fr;
                gap: 30px;
            }
            .sidebar {
                position: static;
                display: grid;
                grid-template-columns: 1fr 1fr;
                gap: 20px;
            }
        }
        @media (max-width: 768px) {
            body {
                padding-top: 60px;
            }
            .header-inner {
                height: 60px;
            }
            .my-logo {
                font-size: 1.2rem;
            }
            nav {
                display: none;
            }
            .hamburger {
                display: flex;
            }
            .mobile-nav.open {
                display: flex;
            }
            h1 {
                font-size: 1.8rem;
            }
            h2 {
                font-size: 1.4rem;
            }
            h3 {
                font-size: 1.15rem;
            }
            .page-wrap {
                padding: 24px 0 40px;
                grid-template-columns: 1fr;
            }
            .sidebar {
                grid-template-columns: 1fr;
            }
            .sidebar-card {
                padding: 18px;
            }
            .form-card {
                padding: 20px;
            }
            .info-box {
                padding: 20px;
            }
            .feature-grid {
                grid-template-columns: 1fr 1fr;
            }
            .friend-grid {
                grid-template-columns: 1fr 1fr;
            }
            footer .container {
                flex-direction: column;
                text-align: center;
            }
        }
        @media (max-width: 480px) {
            .feature-grid {
                grid-template-columns: 1fr;
            }
            .friend-grid {
                grid-template-columns: 1fr;
            }
            h1 {
                font-size: 1.5rem;
            }
            .container {
                padding: 0 14px;
            }
        }
        .schema-hidden {
            display: none;
        }