*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: 'Segoe UI', Roboto, -apple-system, BlinkMacSystemFont, 'Helvetica Neue', Arial, sans-serif;
            background: #f8fafc;
            color: #1e293b;
            line-height: 1.8;
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }
        a {
            color: #1d4ed8;
            text-decoration: none;
            transition: color 0.2s ease;
        }
        a:hover {
            color: #0f3b8c;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 12px;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        h1 {
            font-size: 2.6rem;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 0.75rem;
            color: #0f172a;
            letter-spacing: -0.02em;
        }
        h2 {
            font-size: 2rem;
            font-weight: 700;
            margin-top: 2.8rem;
            margin-bottom: 1rem;
            color: #0f172a;
            border-bottom: 3px solid #e2e8f0;
            padding-bottom: 0.5rem;
        }
        h3 {
            font-size: 1.5rem;
            font-weight: 600;
            margin-top: 2rem;
            margin-bottom: 0.75rem;
            color: #1e293b;
        }
        h4 {
            font-size: 1.2rem;
            font-weight: 600;
            margin-top: 1.5rem;
            margin-bottom: 0.5rem;
            color: #334155;
        }
        p {
            margin-bottom: 1.2rem;
            font-size: 1.05rem;
        }
        .lead {
            font-size: 1.25rem;
            font-weight: 400;
            color: #475569;
            margin-bottom: 1.8rem;
        }
        .text-muted {
            color: #64748b;
            font-size: 0.95rem;
        }
        .site-header {
            background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
            color: #fff;
            padding: 0 0 0 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            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;
            padding: 12px 20px;
            max-width: 1200px;
            margin: 0 auto;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            color: #facc15;
            letter-spacing: -0.03em;
            text-decoration: none;
            transition: opacity 0.2s;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .my-logo:hover {
            opacity: 0.85;
            text-decoration: none;
        }
        .my-logo small {
            font-size: 0.75rem;
            color: #94a3b8;
            font-weight: 400;
            display: block;
            line-height: 1;
        }
        .my-logo .logo-sub {
            font-size: 0.65rem;
            color: #cbd5e1;
            font-weight: 300;
            letter-spacing: 0.3px;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }
        .main-nav a {
            color: #e2e8f0;
            padding: 6px 14px;
            border-radius: 8px;
            font-size: 0.9rem;
            font-weight: 500;
            transition: background 0.2s, color 0.2s;
            white-space: nowrap;
        }
        .main-nav a:hover {
            background: rgba(255, 255, 255, 0.12);
            color: #facc15;
            text-decoration: none;
        }
        .main-nav a.active {
            background: rgba(250, 204, 21, 0.15);
            color: #facc15;
        }
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            background: none;
            border: none;
            padding: 6px 4px;
            z-index: 1001;
        }
        .hamburger span {
            display: block;
            width: 28px;
            height: 3px;
            background: #facc15;
            border-radius: 4px;
            transition: 0.3s ease;
        }
        .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);
        }
        .breadcrumb-wrap {
            background: #f1f5f9;
            padding: 10px 0;
            border-bottom: 1px solid #e2e8f0;
        }
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 6px;
            font-size: 0.85rem;
            color: #64748b;
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .breadcrumb li+li::before {
            content: "›";
            color: #94a3b8;
            margin-right: 6px;
            font-size: 1.1rem;
        }
        .breadcrumb a {
            color: #1d4ed8;
        }
        .breadcrumb .current {
            color: #334155;
            font-weight: 500;
        }
        .page-wrapper {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
            padding: 30px 0 50px;
            flex: 1;
        }
        .main-content {
            min-width: 0;
        }
        .sidebar {
            position: sticky;
            top: 100px;
            align-self: start;
        }
        .card {
            background: #fff;
            border-radius: 16px;
            padding: 24px 28px;
            box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06), 0 6px 16px rgba(0, 0, 0, 0.04);
            margin-bottom: 28px;
            border: 1px solid #f0f2f5;
        }
        .card h3 {
            margin-top: 0;
        }
        .info-box {
            background: #eff6ff;
            border-left: 5px solid #3b82f6;
            padding: 18px 22px;
            border-radius: 10px;
            margin: 1.5rem 0;
        }
        .info-box.warn {
            background: #fef9c3;
            border-left-color: #eab308;
        }
        .info-box.success {
            background: #ecfdf5;
            border-left-color: #10b981;
        }
        .tag {
            display: inline-block;
            background: #e2e8f0;
            padding: 2px 12px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
            color: #334155;
        }
        .tag.blue {
            background: #dbeafe;
            color: #1d4ed8;
        }
        .tag.green {
            background: #dcfce7;
            color: #15803d;
        }
        .tag.amber {
            background: #fef3c7;
            color: #b45309;
        }
        .table-wrap {
            overflow-x: auto;
            margin: 1.5rem 0;
            border-radius: 12px;
            border: 1px solid #e2e8f0;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.95rem;
            background: #fff;
        }
        th,
        td {
            padding: 12px 16px;
            text-align: left;
            border-bottom: 1px solid #e2e8f0;
        }
        th {
            background: #f1f5f9;
            font-weight: 700;
            color: #0f172a;
        }
        tr:last-child td {
            border-bottom: none;
        }
        tr:hover td {
            background: #f8fafc;
        }
        .form-group {
            margin-bottom: 1.2rem;
        }
        .form-group label {
            display: block;
            font-weight: 600;
            margin-bottom: 4px;
            font-size: 0.95rem;
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 12px 16px;
            border: 1px solid #cbd5e1;
            border-radius: 10px;
            font-size: 1rem;
            font-family: inherit;
            transition: border 0.2s, box-shadow 0.2s;
            background: #fff;
        }
        .form-group input:focus,
        .form-group textarea:focus {
            outline: none;
            border-color: #3b82f6;
            box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
        }
        .form-group textarea {
            min-height: 100px;
            resize: vertical;
        }
        .btn {
            display: inline-block;
            padding: 12px 28px;
            background: #1d4ed8;
            color: #fff;
            border: none;
            border-radius: 10px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.2s, transform 0.1s;
            font-family: inherit;
        }
        .btn:hover {
            background: #1e40af;
            transform: translateY(-1px);
        }
        .btn:active {
            transform: translateY(1px);
        }
        .btn.outline {
            background: transparent;
            border: 2px solid #1d4ed8;
            color: #1d4ed8;
        }
        .btn.outline:hover {
            background: #1d4ed8;
            color: #fff;
        }
        .star-rating {
            display: flex;
            flex-direction: row-reverse;
            justify-content: flex-end;
            gap: 4px;
            font-size: 1.8rem;
            cursor: pointer;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            color: #d1d5db;
            transition: color 0.15s;
            cursor: pointer;
        }
        .star-rating label:hover,
        .star-rating label:hover~label,
        .star-rating input:checked~label {
            color: #facc15;
        }
        .site-footer {
            background: #0f172a;
            color: #cbd5e1;
            padding: 40px 0 20px;
            margin-top: auto;
            border-top: 3px solid #facc15;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 30px;
        }
        .site-footer h4 {
            color: #facc15;
            margin-top: 0;
            font-size: 1.1rem;
        }
        .site-footer a {
            color: #94a3b8;
        }
        .site-footer a:hover {
            color: #facc15;
        }
        friend-link {
            display: block;
            margin: 12px 0;
        }
        friend-link a {
            display: inline-block;
            margin-right: 20px;
            padding: 4px 0;
        }
        .copyright {
            border-top: 1px solid #1e293b;
            padding-top: 20px;
            text-align: center;
            font-size: 0.9rem;
            color: #64748b;
        }
        @media (max-width: 1024px) {
            .page-wrapper {
                grid-template-columns: 1fr;
            }
            .sidebar {
                position: static;
                order: 2;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 768px) {
            html {
                font-size: 15px;
            }
            h1 {
                font-size: 1.9rem;
            }
            h2 {
                font-size: 1.6rem;
            }
            h3 {
                font-size: 1.3rem;
            }
            .header-inner {
                padding: 10px 16px;
            }
            .my-logo {
                font-size: 1.4rem;
            }
            .main-nav {
                display: none;
                width: 100%;
                flex-direction: column;
                background: #1e293b;
                padding: 16px 12px;
                border-radius: 0 0 16px 16px;
                margin-top: 8px;
                gap: 4px;
            }
            .main-nav.open {
                display: flex;
            }
            .main-nav a {
                padding: 10px 14px;
                font-size: 1rem;
                border-radius: 8px;
            }
            .hamburger {
                display: flex;
            }
            .breadcrumb {
                font-size: 0.78rem;
            }
            .card {
                padding: 18px 16px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .page-wrapper {
                padding: 16px 0 30px;
            }
            .star-rating {
                font-size: 1.5rem;
            }
        }
        @media (max-width: 480px) {
            .container {
                padding: 0 12px;
            }
            h1 {
                font-size: 1.6rem;
            }
            .lead {
                font-size: 1.05rem;
            }
            .btn {
                width: 100%;
                text-align: center;
            }
        }
        .updated-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: #f1f5f9;
            padding: 4px 16px 4px 12px;
            border-radius: 30px;
            font-size: 0.85rem;
            color: #475569;
            font-weight: 500;
        }
        .divider {
            height: 1px;
            background: #e2e8f0;
            margin: 2rem 0;
        }
        .emoji-big {
            font-size: 1.6rem;
            vertical-align: middle;
        }
        .highlight {
            background: #fef9c3;
            padding: 0 4px;
            border-radius: 4px;
        }
        .grid-2 {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }
        @media (max-width: 640px) {
            .grid-2 {
                grid-template-columns: 1fr;
            }
        }
        .sidebar .card h4 {
            margin-top: 0;
            font-size: 1.1rem;
        }
        .sidebar .card ul {
            list-style: none;
            padding: 0;
        }
        .sidebar .card ul li {
            padding: 8px 0;
            border-bottom: 1px solid #f1f5f9;
        }
        .sidebar .card ul li:last-child {
            border-bottom: none;
        }
        .sidebar .card ul li a {
            font-size: 0.95rem;
        }
        .section-reveal {
            animation: fadeUp 0.6s ease forwards;
        }
        @keyframes fadeUp {
            0% {
                opacity: 0;
                transform: translateY(20px);
            }
            100% {
                opacity: 1;
                transform: translateY(0);
            }
        }