* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        :root {
            --primary: #2d6a9f;
            --primary-light: #4a9fd8;
            --primary-dark: #1a3f5e;
            --secondary: #f5a623;
            --accent: #e85d75;
            --bg: #f8f9fb;
            --card-bg: #ffffff;
            --text: #1e2a3a;
            --text-light: #5a6a7a;
            --border: #e2e6ee;
            --shadow: 0 6px 24px rgba(0, 0, 0, 0.07);
            --radius: 16px;
            --radius-sm: 10px;
            --font: 'Segoe UI', system-ui, -apple-system, sans-serif;
            --max-width: 1200px;
            --transition: 0.25s ease;
        }
        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;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--primary-light);
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            border-radius: var(--radius-sm);
            display: block;
        }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 16px;
        }
        header {
            background: var(--card-bg);
            border-bottom: 1px solid var(--border);
            padding: 12px 0;
            position: sticky;
            top: 0;
            z-index: 100;
            backdrop-filter: blur(8px);
            background: rgba(255, 255, 255, 0.96);
        }
        .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;
            color: var(--primary-dark);
            letter-spacing: -0.5px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .my-logo i {
            color: var(--secondary);
            font-size: 1.8rem;
        }
        .my-logo:hover {
            text-decoration: none;
            color: var(--primary);
        }
        .my-logo span {
            font-weight: 300;
            color: var(--text-light);
            font-size: 0.9rem;
        }
        .nav-wrapper {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        nav {
            display: flex;
            gap: 4px;
            flex-wrap: wrap;
        }
        nav a {
            padding: 8px 16px;
            border-radius: 30px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text);
            transition: background var(--transition), color var(--transition);
        }
        nav a:hover {
            background: var(--primary);
            color: #fff;
            text-decoration: none;
        }
        nav a.active {
            background: var(--primary-dark);
            color: #fff;
        }
        .hamburger {
            display: none;
            background: none;
            border: 2px solid var(--border);
            font-size: 1.4rem;
            padding: 6px 12px;
            border-radius: 8px;
            cursor: pointer;
            color: var(--text);
            transition: background var(--transition);
        }
        .hamburger:hover {
            background: var(--border);
        }
        .breadcrumb {
            padding: 12px 0 4px;
            font-size: 0.85rem;
            color: var(--text-light);
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
            align-items: center;
        }
        .breadcrumb a {
            color: var(--text-light);
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb .sep {
            color: var(--border);
            margin: 0 2px;
        }
        main {
            padding: 28px 0 40px;
        }
        h1 {
            font-size: 2.6rem;
            font-weight: 800;
            line-height: 1.2;
            color: var(--primary-dark);
            margin-bottom: 12px;
            letter-spacing: -0.5px;
        }
        h1 i {
            color: var(--secondary);
            margin-right: 10px;
        }
        h2 {
            font-size: 1.9rem;
            font-weight: 700;
            color: var(--primary-dark);
            margin-top: 48px;
            margin-bottom: 16px;
            padding-bottom: 8px;
            border-bottom: 3px solid var(--secondary);
        }
        h2 i {
            color: var(--secondary);
            margin-right: 10px;
            font-size: 1.6rem;
        }
        h3 {
            font-size: 1.4rem;
            font-weight: 600;
            color: var(--primary);
            margin-top: 32px;
            margin-bottom: 12px;
        }
        h3 i {
            margin-right: 8px;
            color: var(--accent);
        }
        h4 {
            font-size: 1.15rem;
            font-weight: 600;
            color: var(--text);
            margin-top: 22px;
            margin-bottom: 8px;
        }
        p {
            margin-bottom: 16px;
            font-size: 1.02rem;
        }
        .content-card {
            background: var(--card-bg);
            border-radius: var(--radius);
            padding: 32px 28px;
            box-shadow: var(--shadow);
            margin-bottom: 32px;
        }
        .last-updated {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--text-light);
            background: var(--border);
            padding: 4px 16px;
            border-radius: 30px;
            margin-bottom: 20px;
        }
        .featured-image {
            margin: 24px 0;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
        }
        .highlight {
            background: #fff8e0;
            padding: 2px 8px;
            border-radius: 4px;
            font-weight: 600;
        }
        .tip-box {
            background: #e8f4fd;
            border-left: 5px solid var(--primary);
            padding: 18px 22px;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            margin: 20px 0;
        }
        .tip-box strong {
            color: var(--primary-dark);
        }
        .table-wrap {
            overflow-x: auto;
            margin: 20px 0;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.95rem;
        }
        th,
        td {
            padding: 12px 16px;
            text-align: left;
            border-bottom: 1px solid var(--border);
        }
        th {
            background: var(--primary-dark);
            color: #fff;
            font-weight: 600;
        }
        tr:nth-child(even) {
            background: #f6f8fc;
        }
        tr:hover {
            background: #eef2f9;
        }
        .search-section {
            background: var(--card-bg);
            border-radius: var(--radius);
            padding: 28px;
            box-shadow: var(--shadow);
            margin-bottom: 32px;
        }
        .search-form {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            max-width: 640px;
        }
        .search-form input {
            flex: 1;
            min-width: 180px;
            padding: 14px 20px;
            border: 2px solid var(--border);
            border-radius: 40px;
            font-size: 1rem;
            outline: none;
            transition: border var(--transition);
        }
        .search-form input:focus {
            border-color: var(--primary);
        }
        .search-form button {
            padding: 14px 32px;
            background: var(--primary);
            color: #fff;
            border: none;
            border-radius: 40px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: background var(--transition);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .search-form button:hover {
            background: var(--primary-dark);
        }
        .feedback-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
            margin: 32px 0;
        }
        @media (max-width: 700px) {
            .feedback-grid {
                grid-template-columns: 1fr;
            }
        }
        .feedback-card {
            background: var(--card-bg);
            border-radius: var(--radius);
            padding: 28px;
            box-shadow: var(--shadow);
        }
        .feedback-card h3 {
            margin-top: 0;
        }
        .form-group {
            margin-bottom: 16px;
        }
        .form-group label {
            display: block;
            font-weight: 600;
            margin-bottom: 4px;
            font-size: 0.92rem;
        }
        .form-group input,
        .form-group textarea {
            width: 100%;
            padding: 12px 16px;
            border: 2px solid var(--border);
            border-radius: var(--radius-sm);
            font-size: 0.95rem;
            font-family: var(--font);
            transition: border var(--transition);
            outline: none;
        }
        .form-group input:focus,
        .form-group textarea:focus {
            border-color: var(--primary);
        }
        .form-group textarea {
            resize: vertical;
            min-height: 90px;
        }
        .btn-primary {
            padding: 12px 28px;
            background: var(--primary);
            color: #fff;
            border: none;
            border-radius: 30px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: background var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .btn-primary:hover {
            background: var(--primary-dark);
        }
        .star-rating {
            display: flex;
            gap: 4px;
            font-size: 1.7rem;
            cursor: pointer;
            direction: rtl;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            color: #ddd;
            transition: color var(--transition);
            cursor: pointer;
        }
        .star-rating label:hover,
        .star-rating label:hover~label,
        .star-rating input:checked~label {
            color: var(--secondary);
        }
        footer {
            background: var(--primary-dark);
            color: #cfdce8;
            padding: 36px 0 20px;
            border-radius: var(--radius) var(--radius) 0 0;
            margin-top: 40px;
        }
        footer .container {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }
        .footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: 12px 24px;
            justify-content: center;
        }
        .footer-links a {
            color: #b0c8dd;
            font-size: 0.9rem;
        }
        .footer-links a:hover {
            color: #fff;
        }
        friend-link {
            display: flex;
            flex-wrap: wrap;
            gap: 12px 24px;
            justify-content: center;
            padding: 12px 0;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            font-size: 0.9rem;
        }
        friend-link a {
            color: #b0c8dd;
        }
        friend-link a:hover {
            color: #fff;
        }
        .copyright {
            text-align: center;
            font-size: 0.85rem;
            color: #8aa5be;
            padding-top: 12px;
        }
        @media (max-width: 768px) {
            h1 {
                font-size: 1.9rem;
            }
            h2 {
                font-size: 1.5rem;
                margin-top: 32px;
            }
            h3 {
                font-size: 1.2rem;
            }
            .content-card {
                padding: 20px 16px;
            }
            .search-section {
                padding: 20px 16px;
            }
            .feedback-card {
                padding: 20px 16px;
            }
            .header-inner {
                flex-wrap: wrap;
            }
            nav {
                display: none;
                width: 100%;
                flex-direction: column;
                background: var(--card-bg);
                border-radius: var(--radius-sm);
                padding: 12px 8px;
                box-shadow: 0 12px 32px rgba(0, 0, 0, 0.1);
                margin-top: 8px;
            }
            nav.open {
                display: flex;
            }
            nav a {
                padding: 10px 16px;
                border-radius: 8px;
            }
            .hamburger {
                display: block;
            }
            .my-logo {
                font-size: 1.3rem;
            }
            .breadcrumb {
                font-size: 0.78rem;
            }
            .star-rating {
                font-size: 1.4rem;
            }
        }
        @media (max-width: 480px) {
            body {
                padding: 0 10px;
            }
            .container {
                padding: 0 8px;
            }
            h1 {
                font-size: 1.6rem;
            }
            .search-form input {
                min-width: 140px;
                padding: 12px 16px;
            }
            .search-form button {
                padding: 12px 20px;
                font-size: 0.9rem;
            }
        }
        .flex-between {
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            align-items: center;
        }
        .gap-8 {
            gap: 8px;
        }
        .mt-16 {
            margin-top: 16px;
        }
        .mb-8 {
            margin-bottom: 8px;
        }
        .text-center {
            text-align: center;
        }
        .fw-700 {
            font-weight: 700;
        }
        .color-secondary {
            color: var(--secondary);
        }