*,
        *::before,
        *::after {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: 'Segoe UI', Roboto, system-ui, -apple-system, sans-serif;
            background: #f7f9fc;
            color: #1e2a41;
            line-height: 1.7;
            padding: 0 1rem;
        }
        a {
            text-decoration: none;
            color: #2563eb;
            transition: color 0.2s ease;
        }
        a:hover {
            color: #1e40af;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 12px;
        }
        ul,
        ol {
            padding-left: 1.5rem;
            margin: 0.75rem 0 1.25rem 0;
        }
        li {
            margin-bottom: 0.4rem;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0.5rem 0 2rem;
        }
        .site-header {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            padding: 1rem 0 0.6rem;
            border-bottom: 2px solid #e2e8f0;
            position: relative;
            background: #f7f9fc;
        }
        .my-logo {
            font-size: 2rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            background: linear-gradient(135deg, #f59e0b, #ef4444);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            display: inline-block;
            font-family: 'Segoe UI', sans-serif;
        }
        .my-logo small {
            font-size: 0.9rem;
            font-weight: 400;
            -webkit-text-fill-color: #475569;
            color: #475569;
            background: none;
            letter-spacing: 0;
        }
        .my-logo:hover {
            opacity: 0.85;
            text-decoration: none;
        }
        .nav-toggle {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            color: #1e2a41;
            cursor: pointer;
            padding: 0.25rem 0.5rem;
            border-radius: 8px;
            transition: background 0.2s;
        }
        .nav-toggle:hover {
            background: #e2e8f0;
        }
        .nav-menu {
            display: flex;
            gap: 1.25rem;
            align-items: center;
            flex-wrap: wrap;
        }
        .nav-menu a {
            font-weight: 600;
            color: #1e2a41;
            padding: 0.3rem 0;
            border-bottom: 2px solid transparent;
            transition: border-color 0.2s, color 0.2s;
        }
        .nav-menu a:hover {
            border-bottom-color: #f59e0b;
            color: #f59e0b;
            text-decoration: none;
        }
        .nav-menu .active {
            border-bottom-color: #ef4444;
            color: #ef4444;
        }
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            gap: 0.3rem 0.6rem;
            font-size: 0.85rem;
            padding: 0.75rem 0 0.25rem;
            color: #64748b;
        }
        .breadcrumb a {
            color: #2563eb;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .breadcrumb span {
            color: #94a3b8;
        }
        .content-wrapper {
            display: grid;
            grid-template-columns: 1fr;
            gap: 2.5rem;
            margin: 1.5rem 0 2rem;
        }
        @media(min-width:992px) {
            .content-wrapper {
                grid-template-columns: 2fr 1fr;
            }
        }
        .main-article h1 {
            font-size: 2.4rem;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 0.5rem;
            color: #0f172a;
        }
        .main-article h2 {
            font-size: 1.8rem;
            font-weight: 700;
            margin: 2rem 0 0.8rem;
            color: #0f172a;
            border-left: 5px solid #f59e0b;
            padding-left: 1rem;
        }
        .main-article h3 {
            font-size: 1.35rem;
            font-weight: 600;
            margin: 1.6rem 0 0.6rem;
            color: #1e293b;
        }
        .main-article h4 {
            font-size: 1.1rem;
            font-weight: 600;
            margin: 1.2rem 0 0.4rem;
            color: #334155;
        }
        .main-article p {
            margin-bottom: 1rem;
            color: #334155;
        }
        .main-article strong {
            color: #0f172a;
        }
        .main-article .highlight {
            background: #fef3c7;
            padding: 0.1rem 0.4rem;
            border-radius: 4px;
            font-weight: 600;
        }
        .main-article .emoji-big {
            font-size: 1.4rem;
        }
        .featured-image {
            margin: 1.5rem 0 2rem;
            border-radius: 16px;
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
            overflow: hidden;
            background: #e2e8f0;
        }
        .featured-image img {
            width: 100%;
            object-fit: cover;
            max-height: 420px;
        }
        .featured-image figcaption {
            padding: 0.5rem 1rem 0.75rem;
            font-size: 0.85rem;
            color: #64748b;
            background: #fff;
        }
        .last-updated {
            display: inline-block;
            font-size: 0.85rem;
            color: #64748b;
            background: #eef2f6;
            padding: 0.25rem 0.9rem;
            border-radius: 30px;
            margin-bottom: 1rem;
        }
        .sidebar {
            background: #ffffff;
            border-radius: 20px;
            padding: 1.5rem 1.2rem;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
            border: 1px solid #eef2f6;
            align-self: start;
            position: sticky;
            top: 1rem;
        }
        .sidebar h3 {
            font-size: 1.3rem;
            font-weight: 700;
            margin-bottom: 1rem;
            color: #0f172a;
            border-bottom: 2px solid #f59e0b;
            padding-bottom: 0.4rem;
        }
        .sidebar ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .sidebar li {
            padding: 0.5rem 0;
            border-bottom: 1px solid #f1f5f9;
            margin-bottom: 0;
        }
        .sidebar li:last-child {
            border-bottom: none;
        }
        .sidebar a {
            color: #1e293b;
            font-weight: 500;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .sidebar a:hover {
            color: #f59e0b;
            text-decoration: none;
        }
        .sidebar i {
            color: #f59e0b;
            width: 1.2rem;
        }
        .form-block {
            background: #ffffff;
            border-radius: 20px;
            padding: 1.5rem 1.5rem 1.8rem;
            margin: 2rem 0 1.5rem;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
            border: 1px solid #eef2f6;
        }
        .form-block h3 {
            font-size: 1.3rem;
            font-weight: 700;
            margin-bottom: 1rem;
            color: #0f172a;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .form-group {
            display: flex;
            flex-wrap: wrap;
            gap: 0.6rem;
            margin-bottom: 0.8rem;
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            flex: 1 1 200px;
            padding: 0.7rem 1rem;
            border: 1px solid #cbd5e1;
            border-radius: 12px;
            font-size: 0.95rem;
            background: #f8fafc;
            transition: border-color 0.2s, box-shadow 0.2s;
            font-family: inherit;
        }
        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            outline: none;
            border-color: #f59e0b;
            box-shadow: 0 0 0 3px rgba(245, 158, 11, 0.15);
        }
        .form-group textarea {
            min-height: 80px;
            resize: vertical;
            flex-basis: 100%;
        }
        .form-group .btn {
            background: #f59e0b;
            color: #fff;
            border: none;
            padding: 0.7rem 2rem;
            border-radius: 30px;
            font-weight: 600;
            font-size: 0.95rem;
            cursor: pointer;
            transition: background 0.2s, transform 0.1s;
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
        }
        .form-group .btn:hover {
            background: #d97706;
            transform: translateY(-1px);
        }
        .form-group .btn:active {
            transform: translateY(0);
        }
        .form-group .btn-secondary {
            background: #e2e8f0;
            color: #1e293b;
        }
        .form-group .btn-secondary:hover {
            background: #cbd5e1;
        }
        .star-rating {
            display: flex;
            gap: 0.3rem;
            font-size: 1.6rem;
            color: #d1d5db;
            cursor: pointer;
            direction: rtl;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            transition: color 0.15s;
            color: #d1d5db;
        }
        .star-rating label:hover,
        .star-rating label:hover~label,
        .star-rating input:checked~label {
            color: #f59e0b;
        }
        .site-footer {
            margin-top: 3rem;
            padding-top: 2rem;
            border-top: 2px solid #e2e8f0;
            font-size: 0.9rem;
            color: #475569;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 1.5rem;
            padding-bottom: 1.5rem;
        }
        @media(min-width:640px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        .footer-grid h4 {
            font-size: 1.1rem;
            font-weight: 700;
            color: #0f172a;
            margin-bottom: 0.6rem;
        }
        .footer-grid ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-grid li {
            padding: 0.2rem 0;
        }
        .footer-grid a {
            color: #2563eb;
        }
        .footer-grid a:hover {
            text-decoration: underline;
        }
        friend-link {
            display: block;
            background: #eef2f6;
            padding: 1rem 1.2rem;
            border-radius: 16px;
            margin: 0.5rem 0 0.8rem;
            font-weight: 500;
        }
        friend-link a {
            display: inline-block;
            margin: 0.2rem 0.8rem 0.2rem 0;
        }
        .copyright {
            text-align: center;
            padding: 1.2rem 0 0.5rem;
            border-top: 1px solid #e2e8f0;
            color: #64748b;
            font-size: 0.82rem;
        }
        .copyright strong {
            color: #1e293b;
        }
        @media(max-width:768px) {
            .nav-toggle {
                display: block;
            }
            .nav-menu {
                display: none;
                flex-basis: 100%;
                flex-direction: column;
                align-items: flex-start;
                padding: 1rem 0 0.5rem;
                gap: 0.2rem;
            }
            .nav-menu.open {
                display: flex;
            }
            .nav-menu a {
                padding: 0.5rem 0;
                width: 100%;
                border-bottom: 1px solid #eef2f6;
            }
            .nav-menu a:last-child {
                border-bottom: none;
            }
            .main-article h1 {
                font-size: 1.8rem;
            }
            .main-article h2 {
                font-size: 1.4rem;
            }
            .main-article h3 {
                font-size: 1.15rem;
            }
            .my-logo {
                font-size: 1.5rem;
            }
            .sidebar {
                position: static;
            }
            .form-group input,
            .form-group textarea,
            .form-group select {
                flex-basis: 100%;
            }
        }
        @media(max-width:480px) {
            body {
                padding: 0 0.6rem;
            }
            .main-article h1 {
                font-size: 1.5rem;
            }
            .breadcrumb {
                font-size: 0.75rem;
            }
            .star-rating {
                font-size: 1.3rem;
            }
        }
        @keyframes fadeUp {
            0% {
                opacity: 0;
                transform: translateY(12px);
            }
            100% {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .main-article,
        .sidebar,
        .form-block {
            animation: fadeUp 0.5s ease-out;
        }
        .tag-badge {
            display: inline-block;
            background: #dbeafe;
            color: #1e40af;
            font-size: 0.7rem;
            font-weight: 700;
            padding: 0.15rem 0.7rem;
            border-radius: 30px;
            text-transform: uppercase;
            letter-spacing: 0.03em;
        }
        .divider {
            height: 2px;
            background: linear-gradient(to right, #f59e0b, #ef4444);
            width: 80px;
            margin: 0.5rem 0 1.2rem;
            border-radius: 4px;
        }
        .table-wrap {
            overflow-x: auto;
            margin: 1.2rem 0;
            border-radius: 12px;
            border: 1px solid #eef2f6;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.9rem;
            background: #fff;
        }
        th,
        td {
            padding: 0.7rem 1rem;
            text-align: left;
            border-bottom: 1px solid #f1f5f9;
        }
        th {
            background: #f8fafc;
            font-weight: 700;
            color: #0f172a;
        }
        tr:last-child td {
            border-bottom: none;
        }
        .callout {
            background: #fef9e7;
            border-left: 5px solid #f59e0b;
            padding: 0.8rem 1.2rem;
            border-radius: 8px;
            margin: 1rem 0;
        }
        .callout i {
            color: #f59e0b;
            margin-right: 0.5rem;
        }