:root {
            --primary: #4a6fa5; 
            --secondary: #ff7b54; 
            --accent: #6bc46b; 
            --dark: #2c3e50;
            --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; }
        html { scroll-behavior: smooth; }
        body {
            font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
            line-height: 1.7;
            color: #333;
            background-color: #fff;
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }
        a { color: var(--primary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--secondary); }
        img { max-width: 100%; height: auto; display: block; }
        ul, ol { padding-left: 1.5rem; margin: 1rem 0; }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .btn {
            display: inline-block;
            background: var(--primary);
            color: white;
            padding: 12px 28px;
            border-radius: 50px;
            border: none;
            cursor: pointer;
            font-weight: 600;
            transition: var(--transition);
        }
        .btn:hover {
            background: var(--secondary);
            transform: translateY(-3px);
            box-shadow: var(--shadow);
        }
        .section-padding { padding: 4rem 0; }
        .text-center { text-align: center; }
        .mb-1 { margin-bottom: 1rem; }
        .mb-2 { margin-bottom: 2rem; }
        .mb-3 { margin-bottom: 3rem; }
        .site-header {
            background: white;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1rem 20px;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--primary);
            display: flex;
            align-items: center;
        }
        .my-logo i { color: var(--secondary); margin-right: 10px; }
        .my-logo:hover { color: var(--primary); }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .main-nav a {
            font-weight: 600;
            color: var(--dark);
            padding: 0.5rem 0;
            position: relative;
        }
        .main-nav a:hover::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background: var(--secondary);
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            cursor: pointer;
            color: var(--dark);
        }
        .breadcrumb {
            background: #f1f5f9;
            padding: 1rem 20px;
            font-size: 0.9rem;
        }
        .breadcrumb a { color: var(--gray); }
        .breadcrumb a:hover { color: var(--primary); }
        .breadcrumb span { color: var(--gray); }
        .hero {
            background: linear-gradient(135deg, #e3f2fd 0%, #fce4ec 100%);
            padding: 3rem 0;
            border-bottom: 5px solid var(--secondary);
        }
        .hero h1 {
            font-size: 3.2rem;
            color: var(--dark);
            margin-bottom: 1rem;
            line-height: 1.2;
        }
        .hero p.lead {
            font-size: 1.4rem;
            color: var(--gray);
            max-width: 800px;
            margin: 0 auto 2rem;
        }
        .search-box {
            max-width: 700px;
            margin: 2rem auto;
            background: white;
            padding: 2rem;
            border-radius: 16px;
            box-shadow: var(--shadow);
        }
        .search-form {
            display: flex;
            gap: 10px;
        }
        .search-input {
            flex: 1;
            padding: 16px 20px;
            border: 2px solid #ddd;
            border-radius: 50px;
            font-size: 1.1rem;
            outline: none;
            transition: var(--transition);
        }
        .search-input:focus {
            border-color: var(--primary);
        }
        .search-btn {
            background: var(--primary);
            color: white;
            border: none;
            border-radius: 50px;
            padding: 0 30px;
            cursor: pointer;
            font-weight: 600;
            transition: var(--transition);
        }
        .search-btn:hover {
            background: var(--secondary);
        }
        .main-content {
            flex: 1;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
            margin-top: 2rem;
        }
        @media (max-width: 992px) {
            .content-grid { grid-template-columns: 1fr; }
        }
        article h1 { font-size: 2.8rem; color: var(--dark); margin-bottom: 1.5rem; }
        article h2 {
            font-size: 2.2rem;
            color: var(--primary);
            margin-top: 3rem;
            margin-bottom: 1.5rem;
            padding-bottom: 0.5rem;
            border-bottom: 3px solid var(--secondary);
        }
        article h3 { font-size: 1.8rem; color: var(--dark); margin-top: 2.5rem; margin-bottom: 1rem; }
        article h4 { font-size: 1.4rem; color: var(--gray); margin-top: 2rem; margin-bottom: 1rem; }
        article p {
            margin-bottom: 1.5rem;
            font-size: 1.1rem;
            line-height: 1.8;
        }
        .highlight-box {
            background: #f0f9ff;
            border-left: 5px solid var(--primary);
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 8px 8px 0;
        }
        .float-img {
            float: right;
            margin: 0 0 1.5rem 2rem;
            max-width: 400px;
            border-radius: 12px;
            box-shadow: var(--shadow);
        }
        @media (max-width: 768px) {
            .float-img { float: none; margin: 1rem auto; max-width: 100%; }
        }
        .link-list {
            background: #f8f9fa;
            padding: 1.5rem;
            border-radius: 10px;
            margin: 2rem 0;
        }
        .link-list h3 { margin-top: 0; }
        .link-list ul { list-style: none; padding-left: 0; }
        .link-list li { margin-bottom: 0.8rem; padding-left: 1.5rem; position: relative; }
        .link-list li::before {
            content: '🎯';
            position: absolute;
            left: 0;
        }
        .sidebar-widget {
            background: white;
            padding: 1.8rem;
            border-radius: 12px;
            box-shadow: var(--shadow);
            margin-bottom: 2rem;
        }
        .sidebar-widget h3 {
            color: var(--primary);
            margin-bottom: 1.2rem;
            font-size: 1.4rem;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .rating-widget { background: #fff9e6; }
        .star-rating {
            display: flex;
            justify-content: center;
            gap: 5px;
            margin: 1.5rem 0;
        }
        .star-rating input { display: none; }
        .star-rating label {
            font-size: 2rem;
            color: #ddd;
            cursor: pointer;
            transition: var(--transition);
        }
        .star-rating input:checked ~ label,
        .star-rating label:hover,
        .star-rating label:hover ~ label { color: #ffc107; }
        .comment-form textarea,
        .comment-form input {
            width: 100%;
            padding: 12px;
            margin-bottom: 1rem;
            border: 1px solid #ccc;
            border-radius: 8px;
            font-family: inherit;
        }
        .update-time {
            font-size: 0.9rem;
            color: var(--gray);
            font-style: italic;
            margin-top: 3rem;
            padding-top: 1rem;
            border-top: 1px dashed #ccc;
        }
        .site-footer {
            background: var(--dark);
            color: white;
            padding: 3rem 0 1.5rem;
            margin-top: 4rem;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-logo { font-size: 2rem; font-weight: 700; color: white; margin-bottom: 1rem; }
        .friend-links {
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
            list-style: none;
            padding: 0;
        }
        .friend-links a {
            color: #ccc;
            background: rgba(255,255,255,0.05);
            padding: 8px 16px;
            border-radius: 20px;
        }
        .friend-links a:hover {
            background: var(--primary);
            color: white;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #444;
            font-size: 0.9rem;
            color: #aaa;
        }
        @media (max-width: 768px) {
            .hero h1 { font-size: 2.5rem; }
            article h1 { font-size: 2.2rem; }
            article h2 { font-size: 1.8rem; }
            .main-nav ul {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background: white;
                padding: 1rem;
                box-shadow: var(--shadow);
            }
            .main-nav.active ul { display: flex; }
            .hamburger { display: block; }
            .header-container { padding: 1rem; }
        }