* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        :root {
            --primary: #1e3a8a; 
            --secondary: #dc2626; 
            --accent: #fbbf24; 
            --light: #f8fafc;
            --dark: #0f172a;
            --gray: #64748b;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
            --transition: all 0.3s ease;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            background-color: var(--light);
            color: var(--dark);
            line-height: 1.7;
            overflow-x: hidden;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition);
        }
        ul { list-style: none; }
        img { max-width: 100%; height: auto; display: block; }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        section { padding: 60px 0; }
        h1, h2, h3, h4 {
            font-weight: 800;
            line-height: 1.3;
            margin-bottom: 1.2rem;
            color: var(--primary);
        }
        h1 {
            font-size: 3.5rem;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            text-align: center;
        }
        h2 { font-size: 2.5rem; border-left: 5px solid var(--accent); padding-left: 15px; margin-top: 2.5rem;}
        h3 { font-size: 1.8rem; color: var(--secondary); margin-top: 2rem;}
        h4 { font-size: 1.4rem; color: var(--gray);}
        p { margin-bottom: 1.5rem; font-size: 1.1rem;}
        .lead {
            font-size: 1.4rem;
            font-weight: 600;
            color: var(--primary);
            text-align: center;
            max-width: 900px;
            margin: 0 auto 3rem;
        }
        .highlight {
            background-color: rgba(251, 191, 36, 0.2);
            padding: 2px 6px;
            border-radius: 4px;
            font-weight: 600;
        }
        .emoji { font-size: 1.2em; margin-right: 5px; }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: white;
            border-radius: 50px;
            font-weight: 700;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            box-shadow: var(--shadow);
        }
        .btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 20px rgba(30, 58, 138, 0.3);
        }
        .btn-outline {
            background: transparent;
            border: 2px solid var(--primary);
            color: var(--primary);
        }
        .btn-outline:hover {
            background: var(--primary);
            color: white;
        }
        .site-header {
            background-color: white;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 20px;
        }
        .my-logo a {
            font-size: 2.2rem;
            font-weight: 900;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo i { color: var(--accent); font-size: 2.5rem;}
        .main-nav ul {
            display: flex;
            gap: 30px;
        }
        .main-nav a {
            font-weight: 600;
            padding: 8px 0;
            position: relative;
        }
        .main-nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 3px;
            background: var(--accent);
            transition: width 0.3s;
        }
        .main-nav a:hover::after,
        .main-nav a.active::after { width: 100%; }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            cursor: pointer;
            color: var(--primary);
        }
        .breadcrumb {
            background-color: #e2e8f0;
            padding: 12px 20px;
            font-size: 0.95rem;
        }
        .breadcrumb ol {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        .breadcrumb li:not(:last-child)::after {
            content: '›';
            margin-left: 10px;
            color: var(--gray);
        }
        .breadcrumb a:hover { color: var(--secondary); text-decoration: underline;}
        .hero {
            background: linear-gradient(rgba(15, 23, 42, 0.85), rgba(30, 58, 138, 0.9)), url('https://images.unsplash.com/photo-1556056504-5c769b409c48?ixlib=rb-4.0.3&auto=format&fit=crop&w=1200&q=80');
            background-size: cover;
            background-position: center;
            color: white;
            padding: 100px 20px;
            text-align: center;
            border-bottom: 5px solid var(--accent);
        }
        .hero h1 { color: white; background: none; margin-bottom: 1.5rem;}
        .hero .lead { color: #e2e8f0; margin-bottom: 2.5rem;}
        .interactive-module {
            background: white;
            border-radius: 15px;
            padding: 30px;
            margin: 40px 0;
            box-shadow: var(--shadow);
        }
        .module-title {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 25px;
            color: var(--primary);
        }
        .form-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 25px;
        }
        .form-group {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .form-group label {
            font-weight: 600;
            color: var(--dark);
        }
        .form-control, textarea, select {
            padding: 14px 18px;
            border: 2px solid #cbd5e1;
            border-radius: 10px;
            font-size: 1rem;
            transition: var(--transition);
        }
        .form-control:focus, textarea:focus, select:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(30, 58, 138, 0.2);
        }
        textarea { min-height: 120px; resize: vertical;}
        .star-rating {
            display: flex;
            gap: 10px;
            font-size: 2rem;
            color: #cbd5e1;
            cursor: pointer;
        }
        .star-rating i:hover,
        .star-rating i.active { color: var(--accent);}
        .article-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 50px;
        }
        .main-content { grid-column: 1;}
        .sidebar {
            grid-column: 2;
            display: flex;
            flex-direction: column;
            gap: 30px;
        }
        .info-box {
            background: white;
            border-radius: 15px;
            padding: 25px;
            box-shadow: var(--shadow);
            border-top: 5px solid var(--secondary);
        }
        .info-box h3 { margin-top: 0; font-size: 1.5rem;}
        .related-links ul { display: flex; flex-direction: column; gap: 12px;}
        .related-links a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 10px 15px;
            background: #f1f5f9;
            border-radius: 8px;
            border-left: 4px solid transparent;
        }
        .related-links a:hover {
            background: #e2e8f0;
            border-left-color: var(--primary);
            transform: translateX(5px);
        }
        .content-image {
            margin: 40px auto;
            border-radius: 15px;
            overflow: hidden;
            box-shadow: 0 10px 30px rgba(0,0,0,0.15);
            border: 5px solid white;
        }
        .content-image figcaption {
            text-align: center;
            font-style: italic;
            padding: 10px;
            background: #f8fafc;
            color: var(--gray);
        }
        .data-table {
            width: 100%;
            border-collapse: collapse;
            margin: 30px 0;
            box-shadow: var(--shadow);
            border-radius: 10px;
            overflow: hidden;
        }
        .data-table th {
            background: var(--primary);
            color: white;
            padding: 18px 15px;
            text-align: left;
        }
        .data-table td {
            padding: 15px;
            border-bottom: 1px solid #e2e8f0;
        }
        .data-table tr:nth-child(even) { background: #f8fafc;}
        .data-table tr:hover { background: #f0f9ff;}
        .site-footer {
            background: var(--dark);
            color: white;
            padding: 60px 0 30px;
            margin-top: 60px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-logo { font-size: 2rem; font-weight: 900; color: white;}
        .footer-links h4 { color: var(--accent); margin-bottom: 20px;}
        .footer-links ul { display: flex; flex-direction: column; gap: 12px;}
        .footer-links a:hover { color: var(--accent); padding-left: 5px;}
        friend-link {
            display: inline-block;
            background: rgba(255,255,255,0.1);
            padding: 8px 16px;
            border-radius: 6px;
            margin: 5px;
            font-size: 0.9rem;
        }
        friend-link a:hover { color: var(--accent);}
        .copyright {
            text-align: center;
            padding-top: 30px;
            border-top: 1px solid #334155;
            color: #cbd5e1;
            font-size: 0.95rem;
        }
        .update-time {
            color: var(--accent);
            font-weight: 600;
        }
        @media (max-width: 992px) {
            .article-content { grid-template-columns: 1fr;}
            .sidebar { grid-column: 1;}
            h1 { font-size: 2.8rem;}
            h2 { font-size: 2.2rem;}
        }
        @media (max-width: 768px) {
            .main-nav { display: none;}
            .main-nav.active {
                display: block;
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background: white;
                box-shadow: 0 10px 20px rgba(0,0,0,0.1);
                padding: 20px;
            }
            .main-nav.active ul {
                flex-direction: column;
                gap: 15px;
            }
            .hamburger { display: block;}
            .hero { padding: 70px 20px;}
            .form-grid { grid-template-columns: 1fr;}
            .footer-grid { grid-template-columns: 1fr; text-align: center;}
        }