*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        :root {
            --primary: #0a3d62;
            --primary-light: #1e6fa0;
            --secondary: #f39c12;
            --accent: #e74c3c;
            --bg: #faf9f6;
            --card-bg: #ffffff;
            --text: #1e272e;
            --text-light: #57606f;
            --border: #dcdde1;
            --radius: 16px;
            --shadow: 0 8px 30px rgba(0, 0, 0, 0.06);
            --font: 'Segoe UI', Roboto, system-ui, -apple-system, sans-serif;
            --max-width: 1200px;
            --header-height: 70px;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: var(--font);
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            padding-top: var(--header-height);
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: var(--primary-light);
            text-decoration: none;
            transition: color 0.2s ease;
        }
        a:hover {
            color: var(--secondary);
            text-decoration: underline;
        }
        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%;
            height: var(--header-height);
            background: var(--card-bg);
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.06);
            z-index: 1000;
            display: flex;
            align-items: center;
            transition: box-shadow 0.3s ease;
        }
        header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            letter-spacing: -1px;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            text-decoration: none !important;
        }
        .my-logo i {
            -webkit-text-fill-color: var(--secondary);
            font-size: 1.6rem;
        }
        .my-logo:hover {
            opacity: 0.85;
            text-decoration: none !important;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.6rem;
            color: var(--primary);
            cursor: pointer;
            padding: 4px 8px;
            border-radius: 8px;
            transition: background 0.2s;
        }
        .nav-toggle:hover {
            background: rgba(10, 61, 98, 0.08);
        }
        nav#main-nav ul {
            display: flex;
            list-style: none;
            gap: 8px;
            align-items: center;
        }
        nav#main-nav ul li a {
            padding: 8px 16px;
            border-radius: 30px;
            font-weight: 500;
            font-size: 0.92rem;
            color: var(--text);
            transition: all 0.25s ease;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        nav#main-nav ul li a:hover,
        nav#main-nav ul li a.active {
            background: var(--primary);
            color: #fff;
            text-decoration: none;
        }
        .breadcrumb {
            padding: 16px 0 8px;
            font-size: 0.85rem;
            color: var(--text-light);
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 6px;
        }
        .breadcrumb a {
            color: var(--primary-light);
        }
        .breadcrumb span.sep {
            color: #bbb;
        }
        .hero {
            background: linear-gradient(135deg, #0a3d62 0%, #1e6fa0 100%);
            color: #fff;
            padding: 50px 0 40px;
            border-radius: 0 0 var(--radius) var(--radius);
            margin-bottom: 40px;
        }
        .hero h1 {
            font-size: 2.8rem;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 12px;
            letter-spacing: -0.5px;
        }
        .hero h1 i {
            color: var(--secondary);
            margin-right: 12px;
        }
        .hero p {
            font-size: 1.15rem;
            opacity: 0.9;
            max-width: 700px;
            margin-bottom: 16px;
        }
        .hero .meta {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            font-size: 0.9rem;
            opacity: 0.8;
        }
        .hero .meta i {
            margin-right: 6px;
        }
        .search-box {
            background: var(--card-bg);
            border-radius: 50px;
            padding: 6px 6px 6px 20px;
            display: flex;
            align-items: center;
            box-shadow: var(--shadow);
            max-width: 480px;
            margin: 20px 0 0;
            border: 1px solid var(--border);
        }
        .search-box input {
            flex: 1;
            border: none;
            outline: none;
            background: transparent;
            padding: 12px 0;
            font-size: 1rem;
            color: var(--text);
            min-width: 0;
        }
        .search-box button {
            background: var(--primary);
            color: #fff;
            border: none;
            border-radius: 40px;
            padding: 10px 28px;
            font-weight: 600;
            font-size: 0.95rem;
            cursor: pointer;
            transition: background 0.3s ease;
            display: flex;
            align-items: center;
            gap: 8px;
            white-space: nowrap;
        }
        .search-box button:hover {
            background: var(--primary-light);
        }
        .layout {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 40px;
            padding-bottom: 60px;
        }
        .main-content {
            min-width: 0;
        }
        .sidebar {
            position: sticky;
            top: calc(var(--header-height) + 20px);
            align-self: start;
        }
        article section {
            margin-bottom: 48px;
        }
        h2 {
            font-size: 2rem;
            font-weight: 700;
            color: var(--primary);
            margin: 40px 0 16px;
            padding-bottom: 8px;
            border-bottom: 4px solid var(--secondary);
            display: inline-block;
        }
        h3 {
            font-size: 1.5rem;
            font-weight: 600;
            color: var(--primary-light);
            margin: 32px 0 12px;
        }
        h4 {
            font-size: 1.2rem;
            font-weight: 600;
            color: var(--text);
            margin: 24px 0 8px;
        }
        p {
            margin-bottom: 16px;
            font-size: 1.05rem;
        }
        ul,
        ol {
            margin: 0 0 20px 24px;
        }
        li {
            margin-bottom: 8px;
            font-size: 1.05rem;
        }
        .highlight {
            background: linear-gradient(120deg, rgba(243, 156, 18, 0.15), rgba(243, 156, 18, 0.05));
            padding: 20px 24px;
            border-radius: var(--radius);
            border-left: 6px solid var(--secondary);
            margin: 24px 0;
        }
        .highlight strong {
            color: var(--primary);
        }
        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
            gap: 20px;
            margin: 24px 0;
        }
        .card {
            background: var(--card-bg);
            border-radius: var(--radius);
            padding: 24px 20px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            transition: transform 0.2s ease, box-shadow 0.2s ease;
        }
        .card:hover {
            transform: translateY(-4px);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.08);
        }
        .card i {
            font-size: 2rem;
            color: var(--secondary);
            margin-bottom: 12px;
        }
        .card h4 {
            margin: 0 0 8px;
        }
        .card p {
            font-size: 0.95rem;
            color: var(--text-light);
            margin: 0;
        }
        .pro-tip {
            background: #eaf7f0;
            border-radius: var(--radius);
            padding: 20px 24px;
            border-left: 6px solid #27ae60;
            margin: 24px 0;
        }
        .pro-tip i {
            color: #27ae60;
            margin-right: 8px;
        }
        .interactive-box {
            background: var(--card-bg);
            border-radius: var(--radius);
            padding: 28px 30px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            margin: 32px 0;
        }
        .interactive-box h3 {
            margin-top: 0;
        }
        .form-group {
            margin-bottom: 18px;
        }
        .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 var(--border);
            border-radius: 10px;
            font-size: 1rem;
            font-family: inherit;
            background: var(--bg);
            transition: border 0.2s ease;
        }
        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            border-color: var(--primary-light);
            outline: none;
            box-shadow: 0 0 0 3px rgba(30, 111, 160, 0.12);
        }
        .form-group textarea {
            resize: vertical;
            min-height: 100px;
        }
        .btn {
            background: var(--primary);
            color: #fff;
            border: none;
            padding: 12px 32px;
            border-radius: 40px;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            transition: background 0.3s ease, transform 0.15s ease;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .btn:hover {
            background: var(--primary-light);
            transform: scale(1.02);
        }
        .btn-secondary {
            background: var(--secondary);
            color: var(--text);
        }
        .btn-secondary:hover {
            background: #e67e22;
        }
        .rating-stars {
            display: flex;
            gap: 6px;
            font-size: 1.8rem;
            color: #ddd;
            cursor: pointer;
            flex-wrap: wrap;
        }
        .rating-stars i {
            transition: color 0.2s ease, transform 0.15s ease;
        }
        .rating-stars i.active,
        .rating-stars i:hover {
            color: var(--secondary);
            transform: scale(1.1);
        }
        .sidebar-card {
            background: var(--card-bg);
            border-radius: var(--radius);
            padding: 24px 20px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            margin-bottom: 24px;
        }
        .sidebar-card h4 {
            font-size: 1.1rem;
            margin: 0 0 12px;
            display: flex;
            align-items: center;
            gap: 8px;
            color: var(--primary);
        }
        .sidebar-card ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .sidebar-card ul li {
            padding: 6px 0;
            border-bottom: 1px solid #f0f0f0;
            font-size: 0.95rem;
        }
        .sidebar-card ul li:last-child {
            border-bottom: none;
        }
        .sidebar-card ul li a {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sidebar-card ul li a i {
            color: var(--secondary);
            font-size: 0.8rem;
        }
        friend-link {
            display: block;
            background: var(--card-bg);
            border-radius: var(--radius);
            padding: 24px 28px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            margin-top: 40px;
        }
        friend-link h3 {
            margin: 0 0 16px;
            font-size: 1.3rem;
            color: var(--primary);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        friend-link .links-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
            gap: 12px;
        }
        friend-link .links-grid a {
            padding: 6px 12px;
            background: #f5f6fa;
            border-radius: 30px;
            font-size: 0.92rem;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: background 0.2s ease;
        }
        friend-link .links-grid a:hover {
            background: var(--primary);
            color: #fff;
            text-decoration: none;
        }
        footer {
            background: var(--primary);
            color: #ddd;
            padding: 32px 0 24px;
            margin-top: 60px;
            border-radius: var(--radius) var(--radius) 0 0;
        }
        footer .container {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 30px;
        }
        footer h5 {
            color: #fff;
            font-size: 1.1rem;
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        footer a {
            color: #bbb;
        }
        footer a:hover {
            color: var(--secondary);
        }
        footer ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        footer ul li {
            padding: 4px 0;
            font-size: 0.92rem;
        }
        footer .copyright {
            grid-column: 1 / -1;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 20px;
            margin-top: 20px;
            text-align: center;
            font-size: 0.88rem;
            color: #aaa;
        }
        .featured-image {
            margin: 32px 0;
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
        }
        .featured-image figcaption {
            padding: 12px 16px;
            background: var(--card-bg);
            font-size: 0.88rem;
            color: var(--text-light);
            text-align: center;
            border: 1px solid var(--border);
            border-top: none;
            border-radius: 0 0 var(--radius) var(--radius);
        }
        .table-wrap {
            overflow-x: auto;
            margin: 24px 0;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.95rem;
            background: var(--card-bg);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
        }
        th,
        td {
            padding: 12px 16px;
            text-align: left;
            border-bottom: 1px solid var(--border);
        }
        th {
            background: var(--primary);
            color: #fff;
            font-weight: 600;
        }
        tr:last-child td {
            border-bottom: none;
        }
        @media (max-width: 992px) {
            .layout {
                grid-template-columns: 1fr;
            }
            .sidebar {
                position: static;
            }
            .hero h1 {
                font-size: 2.2rem;
            }
            footer .container {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 768px) {
            .nav-toggle {
                display: block;
            }
            nav#main-nav {
                position: fixed;
                top: var(--header-height);
                left: 0;
                width: 100%;
                background: var(--card-bg);
                box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
                padding: 16px 20px;
                border-radius: 0 0 var(--radius) var(--radius);
                transform: translateY(-120%);
                opacity: 0;
                visibility: hidden;
                transition: all 0.35s cubic-bezier(0.22, 1, 0.36, 1);
                max-height: calc(100vh - var(--header-height));
                overflow-y: auto;
            }
            nav#main-nav.open {
                transform: translateY(0);
                opacity: 1;
                visibility: visible;
            }
            nav#main-nav ul {
                flex-direction: column;
                gap: 4px;
            }
            nav#main-nav ul li a {
                padding: 12px 16px;
                border-radius: 12px;
                font-size: 1rem;
                width: 100%;
            }
            .hero {
                padding: 30px 0 24px;
            }
            .hero h1 {
                font-size: 1.8rem;
            }
            .hero h1 i {
                display: none;
            }
            h2 {
                font-size: 1.6rem;
            }
            h3 {
                font-size: 1.3rem;
            }
            .search-box {
                flex-wrap: wrap;
                border-radius: 16px;
                padding: 12px 16px;
                background: rgba(255, 255, 255, 0.12);
                border-color: rgba(255, 255, 255, 0.2);
            }
            .search-box input {
                padding: 8px 0;
                color: #fff;
                width: 100%;
            }
            .search-box input::placeholder {
                color: rgba(255, 255, 255, 0.7);
            }
            .search-box button {
                width: 100%;
                justify-content: center;
                margin-top: 8px;
            }
            footer .container {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .card-grid {
                grid-template-columns: 1fr;
            }
            .rating-stars {
                font-size: 1.5rem;
            }
        }
        @media (max-width: 480px) {
            .hero h1 {
                font-size: 1.5rem;
            }
            .container {
                padding: 0 14px;
            }
            .my-logo {
                font-size: 1.4rem;
            }
            .breadcrumb {
                font-size: 0.78rem;
            }
            .interactive-box {
                padding: 20px 16px;
            }
            .btn {
                width: 100%;
                justify-content: center;
            }
        }
        .featured-image img {
            width: 100%;
            height: auto;
            aspect-ratio: 1200/630;
            object-fit: cover;
            background: #e8ecf0;
        }
        .mt-0 {
            margin-top: 0;
        }
        .mb-0 {
            margin-bottom: 0;
        }
        .flex-center {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .gap-2 {
            gap: 8px;
        }
        .text-center {
            text-align: center;
        }