*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        :root {
            --primary: #003366;
            --secondary: #c8102e;
            --accent: #f5a623;
            --bg: #f9f9f9;
            --bg-card: #ffffff;
            --text: #1a1a1a;
            --text-light: #555;
            --border: #ddd;
            --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
            --radius: 12px;
            --max-width: 1200px;
            --font: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: var(--font);
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            padding: 0 16px;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        a {
            color: var(--secondary);
            text-decoration: none;
            transition: color 0.2s;
        }
        a:hover {
            color: var(--primary);
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            border-radius: var(--radius);
            display: block;
        }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            width: 100%;
            flex: 1;
        }
        header {
            background: var(--bg-card);
            border-bottom: 3px solid var(--secondary);
            padding: 16px 0;
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
        }
        .my-logo {
            font-size: 1.6rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .my-logo i {
            -webkit-text-fill-color: var(--secondary);
            font-size: 1.8rem;
        }
        .my-logo:hover {
            opacity: 0.85;
            text-decoration: none;
        }
        .my-logo small {
            font-size: 0.55rem;
            -webkit-text-fill-color: var(--text-light);
            font-weight: 400;
            display: block;
        }
        .nav-bar {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: wrap;
        }
        .nav-bar a {
            padding: 8px 14px;
            border-radius: 30px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text);
            transition: all 0.25s;
            white-space: nowrap;
        }
        .nav-bar a:hover,
        .nav-bar a.active {
            background: var(--primary);
            color: #fff;
            text-decoration: none;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 1.8rem;
            color: var(--primary);
            cursor: pointer;
            padding: 4px 8px;
            transition: color 0.2s;
        }
        .hamburger:hover {
            color: var(--secondary);
        }
        #nav-toggle {
            display: none;
        }
        .breadcrumb {
            background: var(--bg-card);
            padding: 10px 0;
            font-size: 0.85rem;
            color: var(--text-light);
            border-bottom: 1px solid var(--border);
            margin-bottom: 24px;
        }
        .breadcrumb a {
            color: var(--primary);
        }
        .breadcrumb a:hover {
            color: var(--secondary);
        }
        .breadcrumb span {
            margin: 0 6px;
            color: #aaa;
        }
        .content-wrap {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
            padding: 24px 0;
        }
        .main-content {
            min-width: 0;
        }
        .sidebar {
            position: sticky;
            top: 140px;
            align-self: start;
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 24px 20px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
        }
        .sidebar h3 {
            font-size: 1.2rem;
            margin-bottom: 16px;
            color: var(--primary);
            border-left: 4px solid var(--secondary);
            padding-left: 12px;
        }
        .sidebar ul {
            list-style: none;
        }
        .sidebar li {
            margin-bottom: 10px;
        }
        .sidebar a {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.9rem;
            padding: 6px 0;
            border-bottom: 1px solid #f0f0f0;
        }
        .sidebar a i {
            width: 20px;
            color: var(--secondary);
        }
        h1 {
            font-size: 2.4rem;
            font-weight: 800;
            line-height: 1.2;
            color: var(--primary);
            margin-bottom: 16px;
        }
        h2 {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--primary);
            margin: 40px 0 16px 0;
            padding-bottom: 8px;
            border-bottom: 3px solid var(--secondary);
        }
        h3 {
            font-size: 1.3rem;
            font-weight: 600;
            color: #222;
            margin: 28px 0 12px 0;
        }
        h4 {
            font-size: 1.05rem;
            font-weight: 600;
            color: #333;
            margin: 20px 0 8px 0;
        }
        p {
            margin-bottom: 16px;
            font-size: 1rem;
        }
        .lead {
            font-size: 1.2rem;
            color: var(--text-light);
            line-height: 1.8;
            margin-bottom: 24px;
        }
        .highlight {
            background: #fff3d6;
            padding: 2px 8px;
            border-radius: 4px;
            font-weight: 600;
        }
        .emoji-big {
            font-size: 2rem;
            margin-right: 6px;
        }
        .stat-box {
            background: var(--bg-card);
            border-left: 5px solid var(--secondary);
            padding: 20px 24px;
            border-radius: 0 var(--radius) var(--radius) 0;
            box-shadow: var(--shadow);
            margin: 24px 0;
        }
        .stat-box strong {
            color: var(--primary);
        }
        .grid-2 {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
            margin: 24px 0;
        }
        .grid-3 {
            display: grid;
            grid-template-columns: 1fr 1fr 1fr;
            gap: 20px;
            margin: 24px 0;
        }
        .card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 20px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            transition: transform 0.2s, box-shadow 0.2s;
        }
        .card:hover {
            transform: translateY(-4px);
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
        }
        .card i {
            font-size: 2rem;
            color: var(--secondary);
            margin-bottom: 12px;
        }
        .card h4 {
            margin-top: 0;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 18px 22px;
            margin-bottom: 12px;
            border: 1px solid var(--border);
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
        }
        .faq-item strong {
            color: var(--primary);
            display: block;
            margin-bottom: 6px;
            font-size: 1.05rem;
        }
        .image-wrapper {
            margin: 28px 0;
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
        }
        .image-wrapper img {
            width: 100%;
            display: block;
        }
        .image-wrapper figcaption {
            background: var(--bg-card);
            padding: 12px 18px;
            font-size: 0.9rem;
            color: var(--text-light);
            border-top: 1px solid var(--border);
        }
        .search-form {
            display: flex;
            gap: 8px;
            margin: 24px 0;
            max-width: 600px;
        }
        .search-form input {
            flex: 1;
            padding: 12px 18px;
            border: 2px solid var(--border);
            border-radius: 30px;
            font-size: 1rem;
            outline: none;
            transition: border 0.3s;
        }
        .search-form input:focus {
            border-color: var(--primary);
        }
        .search-form button {
            padding: 12px 28px;
            background: var(--primary);
            color: #fff;
            border: none;
            border-radius: 30px;
            font-size: 1rem;
            cursor: pointer;
            transition: background 0.3s;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .search-form button:hover {
            background: var(--secondary);
        }
        .user-feedback {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 28px 32px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            margin: 40px 0;
        }
        .user-feedback h2 {
            margin-top: 0;
            border-bottom: 3px solid var(--secondary);
        }
        .feedback-form {
            display: grid;
            gap: 16px;
            margin-top: 16px;
        }
        .feedback-form label {
            font-weight: 600;
            font-size: 0.95rem;
        }
        .feedback-form input,
        .feedback-form textarea,
        .feedback-form select {
            padding: 12px 16px;
            border: 2px solid var(--border);
            border-radius: 8px;
            font-size: 1rem;
            font-family: var(--font);
            transition: border 0.3s;
            width: 100%;
        }
        .feedback-form input:focus,
        .feedback-form textarea:focus,
        .feedback-form select:focus {
            border-color: var(--primary);
            outline: none;
        }
        .feedback-form textarea {
            min-height: 120px;
            resize: vertical;
        }
        .feedback-form .star-rating {
            display: flex;
            gap: 6px;
            font-size: 1.6rem;
            direction: rtl;
        }
        .feedback-form .star-rating input {
            display: none;
        }
        .feedback-form .star-rating label {
            cursor: pointer;
            color: #ccc;
            transition: color 0.2s;
            font-size: 1.8rem;
        }
        .feedback-form .star-rating label:hover,
        .feedback-form .star-rating label:hover~label,
        .feedback-form .star-rating input:checked~label {
            color: var(--accent);
        }
        .feedback-form .btn-group {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }
        .feedback-form .btn-group button {
            padding: 12px 32px;
            border: none;
            border-radius: 30px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
        }
        .btn-primary:hover {
            background: #002244;
            transform: translateY(-2px);
        }
        .btn-secondary {
            background: var(--secondary);
            color: #fff;
        }
        .btn-secondary:hover {
            background: #a00a1e;
            transform: translateY(-2px);
        }
        footer {
            background: var(--primary);
            color: #fff;
            padding: 40px 0 24px 0;
            margin-top: 48px;
            border-radius: var(--radius) var(--radius) 0 0;
        }
        footer a {
            color: #ffcaca;
        }
        footer a:hover {
            color: #fff;
        }
        .footer-inner {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 32px;
        }
        .footer-inner h4 {
            color: #fff;
            font-size: 1.1rem;
            margin-bottom: 12px;
            border-left: 3px solid var(--accent);
            padding-left: 12px;
        }
        .footer-inner ul {
            list-style: none;
        }
        .footer-inner li {
            margin-bottom: 8px;
        }
        .footer-inner a {
            font-size: 0.9rem;
        }
        .friend-link {
            display: block;
            background: rgba(255, 255, 255, 0.08);
            padding: 16px 20px;
            border-radius: 8px;
            margin-top: 12px;
            font-size: 0.95rem;
        }
        .friend-link a {
            margin: 0 8px;
        }
        .copyright {
            border-top: 1px solid rgba(255, 255, 255, 0.2);
            padding-top: 20px;
            text-align: center;
            font-size: 0.85rem;
            color: #ccc;
        }
        .copyright strong {
            color: #fff;
        }
        @media (max-width: 1024px) {
            .content-wrap {
                grid-template-columns: 1fr;
            }
            .sidebar {
                position: static;
                margin-top: 32px;
            }
            .footer-inner {
                grid-template-columns: 1fr 1fr;
            }
            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.5rem;
            }
            .grid-2,
            .grid-3 {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
            .nav-bar {
                display: none;
                width: 100%;
                flex-direction: column;
                align-items: stretch;
                background: var(--bg-card);
                padding: 12px 0;
                border-top: 1px solid var(--border);
                margin-top: 12px;
            }
            .nav-bar a {
                padding: 10px 16px;
                border-radius: 0;
                border-bottom: 1px solid #f0f0f0;
            }
            #nav-toggle:checked~.nav-bar {
                display: flex;
            }
            .header-inner {
                flex-wrap: wrap;
            }
            .my-logo {
                font-size: 1.3rem;
            }
            h1 {
                font-size: 1.6rem;
            }
            h2 {
                font-size: 1.3rem;
            }
            .footer-inner {
                grid-template-columns: 1fr;
            }
            .feedback-form .btn-group {
                flex-direction: column;
            }
            .feedback-form .btn-group button {
                width: 100%;
                justify-content: center;
            }
            .user-feedback {
                padding: 20px 16px;
            }
            .stat-box {
                padding: 16px 18px;
            }
        }
        @media (max-width: 480px) {
            body {
                padding: 0 8px;
            }
            .search-form {
                flex-direction: column;
            }
            .search-form button {
                justify-content: center;
            }
            .breadcrumb {
                font-size: 0.75rem;
            }
        }
        .scroll-top {
            position: fixed;
            bottom: 24px;
            right: 24px;
            background: var(--primary);
            color: #fff;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.25);
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s;
            z-index: 99;
            border: none;
            cursor: pointer;
        }
        .scroll-top.visible {
            opacity: 1;
            visibility: visible;
        }
        .scroll-top:hover {
            background: var(--secondary);
            transform: translateY(-4px);
        }