:root {
            --primary: #0055D5;
            --primary-dark: #003A8F;
            --secondary: #FF6B00;
            --accent: #00C853;
            --light: #F5F9FF;
            --dark: #1A1A2E;
            --gray: #6C757D;
            --text: #333333;
            --shadow: 0 4px 12px rgba(0, 85, 213, 0.1);
            --radius: 8px;
            --transition: all 0.3s ease;
            --max-width: 1200px;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: var(--text);
            background-color: var(--light);
            overflow-x: hidden;
        }
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius);
        }
        ul, ol {
            padding-left: 1.5rem;
        }
        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            white-space: nowrap;
            border: 0;
        }
        header {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            color: white;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-top {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 0;
        }
        .my-logo {
            font-family: 'Arial Black', sans-serif;
            font-size: 2.2rem;
            font-weight: 900;
            letter-spacing: -1px;
            background: linear-gradient(to right, #FFFFFF, #FFD166);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.2);
        }
        .my-logo:hover {
            transform: scale(1.02);
        }
        .search-box {
            display: flex;
            max-width: 300px;
            width: 100%;
        }
        .search-box input {
            flex: 1;
            padding: 10px 15px;
            border: none;
            border-radius: var(--radius) 0 0 var(--radius);
            font-size: 1rem;
        }
        .search-box button {
            background-color: var(--secondary);
            color: white;
            border: none;
            padding: 10px 20px;
            border-radius: 0 var(--radius) var(--radius) 0;
            cursor: pointer;
            font-size: 1rem;
        }
        .search-box button:hover {
            background-color: #e05a00;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            cursor: pointer;
            color: white;
            background: none;
            border: none;
        }
        nav ul {
            display: flex;
            list-style: none;
            background-color: rgba(0, 0, 0, 0.15);
            border-radius: var(--radius);
            padding: 5px;
        }
        nav li {
            margin: 0 5px;
        }
        nav a {
            display: block;
            padding: 12px 20px;
            border-radius: calc(var(--radius) - 2px);
            font-weight: 600;
        }
        nav a:hover, nav a.active {
            background-color: white;
            color: var(--primary);
        }
        .breadcrumb {
            padding: 12px 0;
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.85);
        }
        .breadcrumb a:hover {
            color: white;
            text-decoration: underline;
        }
        main {
            background-color: white;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 40px;
            margin: 30px auto;
        }
        h1 {
            font-size: 2.8rem;
            color: var(--primary-dark);
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-bottom: 3px solid var(--secondary);
            padding-bottom: 15px;
        }
        h2 {
            font-size: 2rem;
            color: var(--primary);
            margin: 2.5rem 0 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 1px dashed var(--gray);
        }
        h3 {
            font-size: 1.6rem;
            color: var(--dark);
            margin: 2rem 0 1rem;
        }
        h4 {
            font-size: 1.3rem;
            color: var(--gray);
            margin: 1.5rem 0 0.8rem;
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
            hyphens: auto;
        }
        .lead {
            font-size: 1.2rem;
            font-weight: 500;
            color: var(--primary-dark);
            background-color: #F0F7FF;
            padding: 20px;
            border-left: 4px solid var(--accent);
            border-radius: 0 var(--radius) var(--radius) 0;
            margin-bottom: 2.5rem;
        }
        .highlight {
            background-color: #FFF9E6;
            padding: 20px;
            border-radius: var(--radius);
            border-left: 5px solid #FFB300;
            margin: 2rem 0;
        }
        .highlight strong {
            color: #E65100;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 20px;
            margin: 2.5rem 0;
        }
        .stat-card {
            background: linear-gradient(145deg, #ffffff, #e6f0ff);
            border-radius: var(--radius);
            padding: 25px;
            text-align: center;
            box-shadow: 0 5px 15px rgba(0, 85, 213, 0.08);
            transition: var(--transition);
        }
        .stat-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(0, 85, 213, 0.15);
        }
        .stat-card i {
            font-size: 2.5rem;
            color: var(--primary);
            margin-bottom: 15px;
        }
        .stat-card h4 {
            color: var(--primary-dark);
            margin: 0 0 10px;
        }
        .stat-card p {
            font-size: 0.95rem;
            color: var(--gray);
            margin-bottom: 0;
        }
        .img-caption {
            text-align: center;
            font-style: italic;
            color: var(--gray);
            margin-top: 10px;
            font-size: 0.9rem;
        }
        .link-list {
            columns: 2;
            column-gap: 40px;
            margin: 2rem 0;
        }
        .link-list li {
            margin-bottom: 10px;
            break-inside: avoid;
        }
        .link-list a {
            color: var(--primary);
            padding: 5px 0;
            display: inline-block;
            border-bottom: 1px dotted transparent;
        }
        .link-list a:hover {
            color: var(--secondary);
            border-bottom-color: var(--secondary);
        }
        .update-time {
            text-align: right;
            color: var(--gray);
            font-size: 0.9rem;
            margin-top: 3rem;
            padding-top: 1rem;
            border-top: 1px solid #eee;
        }
        .emoji {
            font-size: 1.2em;
            margin-right: 5px;
        }
        .user-interaction {
            background-color: #F8FAFC;
            border-radius: var(--radius);
            padding: 30px;
            margin: 3rem 0;
            border: 1px solid #E2E8F0;
        }
        .interaction-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
        }
        .interaction-form h3 {
            margin-top: 0;
        }
        .interaction-form label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
            color: var(--dark);
        }
        .interaction-form input,
        .interaction-form textarea,
        .interaction-form select {
            width: 100%;
            padding: 12px 15px;
            margin-bottom: 20px;
            border: 1px solid #CBD5E0;
            border-radius: var(--radius);
            font-family: inherit;
            font-size: 1rem;
            transition: var(--transition);
        }
        .interaction-form input:focus,
        .interaction-form textarea:focus,
        .interaction-form select:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(0, 85, 213, 0.2);
        }
        .interaction-form button {
            background-color: var(--primary);
            color: white;
            border: none;
            padding: 12px 25px;
            border-radius: var(--radius);
            cursor: pointer;
            font-size: 1rem;
            font-weight: 600;
            transition: var(--transition);
        }
        .interaction-form button:hover {
            background-color: var(--primary-dark);
        }
        .star-rating {
            display: flex;
            justify-content: center;
            gap: 10px;
            margin: 15px 0;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            font-size: 2rem;
            color: #ddd;
            cursor: pointer;
            transition: var(--transition);
        }
        .star-rating label:hover,
        .star-rating label:hover ~ label,
        .star-rating input:checked ~ label {
            color: #FFC107;
        }
        footer {
            background-color: var(--dark);
            color: #B0B7C3;
            padding: 50px 0 20px;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-section h3 {
            color: white;
            font-size: 1.3rem;
            margin-bottom: 20px;
        }
        .footer-section ul {
            list-style: none;
            padding-left: 0;
        }
        .footer-section li {
            margin-bottom: 12px;
        }
        .footer-section a:hover {
            color: white;
            padding-left: 5px;
        }
        friend-link {
            display: inline-block;
            background-color: rgba(255, 255, 255, 0.05);
            padding: 8px 15px;
            border-radius: 20px;
            margin: 5px;
            border: 1px solid rgba(255, 255, 255, 0.1);
        }
        friend-link a {
            color: #4FC3F7;
        }
        friend-link a:hover {
            color: #29B6F6;
            text-decoration: underline;
        }
        .copyright {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            font-size: 0.9rem;
            color: #8A94A6;
        }
        @media (max-width: 992px) {
            h1 { font-size: 2.4rem; }
            h2 { font-size: 1.8rem; }
            .header-top { flex-wrap: wrap; }
            .search-box { order: 3; max-width: 100%; margin-top: 15px; }
            .link-list { columns: 1; }
        }
        @media (max-width: 768px) {
            .hamburger { display: block; }
            nav { display: none; width: 100%; margin-top: 15px; }
            nav.active { display: block; }
            nav ul { flex-direction: column; }
            nav li { margin: 5px 0; }
            main { padding: 25px; }
            .header-top { padding: 15px 0; }
            .footer-content { grid-template-columns: 1fr; }
        }
        @media (max-width: 576px) {
            .container { padding: 0 15px; }
            h1 { font-size: 2rem; }
            h2 { font-size: 1.6rem; }
            .lead { font-size: 1.1rem; padding: 15px; }
            .interaction-grid { grid-template-columns: 1fr; }
            .stats-grid { grid-template-columns: 1fr; }
        }