:root {
            --primary: #4a6fa5;
            --secondary: #ff9f1c;
            --accent: #2ec4b6;
            --dark: #1a1a2e;
            --light: #f8f9fa;
            --gray: #6c757d;
            --shadow: 0 4px 12px rgba(0,0,0,0.08);
            --transition: all 0.3s ease;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', system-ui, sans-serif;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            background-color: #fff;
            color: #333;
            line-height: 1.7;
            overflow-x: hidden;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: linear-gradient(135deg, var(--dark), #16213e);
            color: white;
            padding: 1rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: var(--shadow);
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .logo a {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--accent);
            text-decoration: none;
            letter-spacing: 1px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo i {
            color: var(--secondary);
        }
        .logo span {
            background: linear-gradient(to right, var(--accent), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        nav {
            display: flex;
            align-items: center;
            gap: 2rem;
        }
        .nav-links {
            display: flex;
            list-style: none;
            gap: 1.8rem;
        }
        .nav-links a {
            color: #e2e8f0;
            text-decoration: none;
            font-weight: 600;
            font-size: 1.05rem;
            transition: var(--transition);
            padding: 0.5rem 0;
            position: relative;
        }
        .nav-links a:hover {
            color: var(--secondary);
        }
        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 3px;
            background: var(--secondary);
            transition: width 0.3s;
        }
        .nav-links a:hover::after {
            width: 100%;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            cursor: pointer;
            color: var(--light);
        }
        .breadcrumb {
            padding: 1rem 0;
            background-color: #f1f5f9;
            font-size: 0.95rem;
            color: var(--gray);
        }
        .breadcrumb a {
            color: var(--primary);
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .search-box {
            background: white;
            border-radius: 50px;
            padding: 0.5rem 1.5rem;
            display: flex;
            align-items: center;
            box-shadow: var(--shadow);
            border: 2px solid #e2e8f0;
        }
        .search-box input {
            border: none;
            outline: none;
            padding: 0.5rem;
            width: 220px;
            font-size: 1rem;
        }
        .search-box button {
            background: none;
            border: none;
            color: var(--primary);
            cursor: pointer;
            font-size: 1.2rem;
            transition: var(--transition);
        }
        .search-box button:hover {
            color: var(--secondary);
        }
        main {
            padding: 2.5rem 0;
        }
        article {
            background: white;
            border-radius: 15px;
            padding: 2.5rem;
            box-shadow: var(--shadow);
            margin-bottom: 2.5rem;
        }
        h1 {
            color: var(--dark);
            font-size: 2.8rem;
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-left: 6px solid var(--secondary);
            padding-left: 1.5rem;
        }
        h2 {
            color: var(--primary);
            font-size: 2rem;
            margin: 2.5rem 0 1.2rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px dashed #e2e8f0;
        }
        h3 {
            color: var(--accent);
            font-size: 1.6rem;
            margin: 2rem 0 1rem;
        }
        h4 {
            color: var(--dark);
            font-size: 1.3rem;
            margin: 1.5rem 0 0.8rem;
        }
        p {
            margin-bottom: 1.5rem;
            font-size: 1.1rem;
            text-align: justify;
        }
        .lead {
            font-size: 1.3rem;
            color: var(--primary);
            font-weight: 600;
            background: #f0f9ff;
            padding: 1.5rem;
            border-radius: 10px;
            border-left: 5px solid var(--accent);
            margin: 2rem 0;
        }
        .highlight {
            background: linear-gradient(120deg, #ffecb3 0%, #ffecb3 100%);
            padding: 0.2rem 0.5rem;
            border-radius: 4px;
            font-weight: 600;
        }
        .emoji {
            font-size: 1.2em;
            margin-right: 5px;
        }
        .content-img {
            width: 100%;
            max-width: 800px;
            height: auto;
            border-radius: 12px;
            margin: 2rem auto;
            display: block;
            box-shadow: 0 8px 20px rgba(0,0,0,0.1);
            border: 5px solid white;
        }
        .link-list {
            background: #f8f9fa;
            border-radius: 10px;
            padding: 1.5rem;
            margin: 2rem 0;
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 1rem;
        }
        .link-list a {
            color: var(--primary);
            text-decoration: none;
            padding: 0.8rem 1rem;
            background: white;
            border-radius: 8px;
            display: flex;
            align-items: center;
            gap: 10px;
            transition: var(--transition);
            border-left: 4px solid var(--accent);
        }
        .link-list a:hover {
            background: var(--primary);
            color: white;
            transform: translateY(-3px);
        }
        .link-list i {
            color: var(--secondary);
        }
        .interactive-section {
            background: linear-gradient(135deg, #f0f9ff, #e6f7ff);
            border-radius: 15px;
            padding: 2rem;
            margin: 3rem 0;
            border: 1px solid #bae7ff;
        }
        .interactive-section h3 {
            color: var(--primary);
        }
        .rating {
            display: flex;
            gap: 0.5rem;
            margin: 1.5rem 0;
        }
        .star {
            font-size: 2rem;
            color: #ddd;
            cursor: pointer;
            transition: var(--transition);
        }
        .star:hover,
        .star.active {
            color: #ffc107;
        }
        textarea, input[type="text"], input[type="email"] {
            width: 100%;
            padding: 1rem;
            border: 2px solid #ced4da;
            border-radius: 8px;
            font-size: 1rem;
            margin-bottom: 1.2rem;
            transition: var(--transition);
        }
        textarea:focus, input:focus {
            border-color: var(--primary);
            outline: none;
            box-shadow: 0 0 0 3px rgba(74, 111, 165, 0.2);
        }
        button, .btn {
            background: linear-gradient(to right, var(--primary), var(--accent));
            color: white;
            border: none;
            padding: 1rem 2rem;
            border-radius: 50px;
            font-size: 1.1rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 10px;
            box-shadow: 0 4px 12px rgba(74, 111, 165, 0.3);
        }
        button:hover, .btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 6px 18px rgba(74, 111, 165, 0.4);
        }
        .update-time {
            text-align: center;
            font-style: italic;
            color: var(--gray);
            margin: 2rem 0;
            padding-top: 2rem;
            border-top: 1px solid #dee2e6;
        }
        footer {
            background: var(--dark);
            color: #cbd5e1;
            padding: 3rem 0 1.5rem;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2.5rem;
            margin-bottom: 2rem;
        }
        .footer-logo {
            font-size: 2rem;
            font-weight: 800;
            color: var(--accent);
            margin-bottom: 1rem;
        }
        .footer-links h4 {
            color: white;
            margin-bottom: 1.5rem;
            font-size: 1.3rem;
        }
        .footer-links ul {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 0.8rem;
        }
        .footer-links a {
            color: #94a3b8;
            text-decoration: none;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .footer-links a:hover {
            color: var(--secondary);
            padding-left: 5px;
        }
        friend-link {
            display: block;
            background: rgba(255,255,255,0.05);
            padding: 1.5rem;
            border-radius: 10px;
            margin: 1.5rem 0;
        }
        friend-link a {
            color: var(--accent);
            font-weight: 600;
            text-decoration: none;
            font-size: 1.1rem;
        }
        friend-link a:hover {
            text-decoration: underline;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #334155;
            font-size: 0.95rem;
            color: #94a3b8;
        }
        @media (max-width: 992px) {
            h1 { font-size: 2.4rem; }
            h2 { font-size: 1.8rem; }
            .nav-links { gap: 1.2rem; }
        }
        @media (max-width: 768px) {
            .header-container { flex-wrap: wrap; }
            .hamburger { display: block; }
            .nav-links {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background: var(--dark);
                padding: 1.5rem;
                box-shadow: 0 10px 20px rgba(0,0,0,0.2);
                z-index: 999;
            }
            .nav-links.active { display: flex; }
            .search-box input { width: 180px; }
            article { padding: 1.8rem; }
            .footer-container { grid-template-columns: 1fr; }
        }
        @media (max-width: 576px) {
            h1 { font-size: 2rem; }
            .lead { font-size: 1.1rem; }
            .search-box { width: 100%; margin-top: 1rem; }
            .search-box input { width: 100%; }
            .link-list { grid-template-columns: 1fr; }
        }