:root {
            --primary: #2E7D32;
            --primary-dark: #1B5E20;
            --primary-light: #4CAF50;
            --secondary: #FF9800;
            --accent: #9C27B0;
            --light: #f8f9fa;
            --dark: #212121;
            --gray: #757575;
            --gray-light: #e0e0e0;
            --transition: all 0.3s ease;
            --shadow: 0 4px 12px rgba(0,0,0,0.08);
            --shadow-hover: 0 8px 24px rgba(0,0,0,0.12);
            --border-radius: 8px;
            --max-width: 1200px;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
        }
        html {
            scroll-behavior: smooth;
            line-height: 1.6;
        }
        body {
            background-color: #f5f7fa;
            color: #333;
            overflow-x: hidden;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background-color: white;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-inner {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 0;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--primary);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo i {
            color: var(--secondary);
        }
        .my-logo:hover {
            color: var(--primary-dark);
        }
        .breadcrumb {
            padding: 15px 0;
            background-color: #f0f4f8;
            font-size: 0.9rem;
            color: var(--gray);
        }
        .breadcrumb a {
            color: var(--primary);
        }
        .breadcrumb span {
            margin: 0 5px;
        }
        .nav-desktop {
            display: flex;
            gap: 30px;
        }
        .nav-desktop a {
            font-weight: 600;
            padding: 5px 0;
            position: relative;
        }
        .nav-desktop a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--secondary);
            transition: var(--transition);
        }
        .nav-desktop a:hover::after {
            width: 100%;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            color: var(--primary);
            cursor: pointer;
            padding: 5px;
        }
        .nav-mobile {
            display: none;
            flex-direction: column;
            background-color: white;
            position: absolute;
            top: 100%;
            left: 0;
            width: 100%;
            box-shadow: var(--shadow);
            padding: 20px;
            z-index: 999;
        }
        .nav-mobile.active {
            display: flex;
        }
        .nav-mobile a {
            padding: 12px 0;
            border-bottom: 1px solid var(--gray-light);
            font-weight: 600;
        }
        .nav-mobile a:last-child {
            border-bottom: none;
        }
        main {
            padding: 30px 0;
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
        }
        .content-area {
            background-color: white;
            border-radius: var(--border-radius);
            padding: 40px;
            box-shadow: var(--shadow);
        }
        .sidebar {
            background-color: white;
            border-radius: var(--border-radius);
            padding: 25px;
            box-shadow: var(--shadow);
            align-self: start;
            position: sticky;
            top: 100px;
        }
        h1 {
            color: var(--primary-dark);
            font-size: 2.8rem;
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-bottom: 3px solid var(--secondary);
            padding-bottom: 15px;
        }
        h2 {
            color: var(--primary);
            font-size: 2rem;
            margin: 2.5rem 0 1.2rem 0;
            padding-top: 10px;
        }
        h3 {
            color: var(--primary-dark);
            font-size: 1.5rem;
            margin: 2rem 0 1rem 0;
        }
        h4 {
            color: var(--gray);
            font-size: 1.2rem;
            margin: 1.5rem 0 0.8rem 0;
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        .lead {
            font-size: 1.2rem;
            font-weight: 500;
            color: var(--dark);
            background-color: #E8F5E9;
            padding: 20px;
            border-left: 5px solid var(--primary);
            border-radius: var(--border-radius);
            margin-bottom: 2rem;
        }
        .highlight {
            background-color: #FFF3E0;
            padding: 20px;
            border-radius: var(--border-radius);
            border-left: 5px solid var(--secondary);
            margin: 2rem 0;
        }
        .quote {
            font-style: italic;
            padding: 25px;
            background-color: #F3E5F5;
            border-radius: var(--border-radius);
            margin: 2rem 0;
            position: relative;
        }
        .quote::before {
            content: '"';
            font-size: 4rem;
            color: var(--accent);
            opacity: 0.3;
            position: absolute;
            top: -10px;
            left: 10px;
        }
        .stats {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 20px;
            margin: 2.5rem 0;
        }
        .stat-card {
            background: linear-gradient(135deg, var(--primary-light), var(--primary));
            color: white;
            padding: 25px;
            border-radius: var(--border-radius);
            text-align: center;
            box-shadow: var(--shadow);
            transition: var(--transition);
        }
        .stat-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-hover);
        }
        .stat-card i {
            font-size: 2.5rem;
            margin-bottom: 15px;
        }
        .stat-card .number {
            font-size: 2.8rem;
            font-weight: 800;
            display: block;
            line-height: 1;
        }
        .stat-card .label {
            font-size: 1rem;
            opacity: 0.9;
        }
        .feature-box {
            background-color: #E3F2FD;
            border-radius: var(--border-radius);
            padding: 30px;
            margin: 3rem 0;
        }
        .feature-title {
            display: flex;
            align-items: center;
            gap: 15px;
            margin-bottom: 20px;
            color: var(--primary-dark);
        }
        .feature-title i {
            font-size: 2rem;
            color: var(--secondary);
        }
        form {
            display: flex;
            flex-direction: column;
            gap: 15px;
        }
        input, textarea, select {
            padding: 14px;
            border: 1px solid var(--gray-light);
            border-radius: var(--border-radius);
            font-size: 1rem;
            transition: var(--transition);
        }
        input:focus, textarea:focus, select:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(46, 125, 50, 0.1);
        }
        button, .btn {
            background-color: var(--primary);
            color: white;
            border: none;
            padding: 14px 25px;
            border-radius: var(--border-radius);
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
        }
        button:hover, .btn:hover {
            background-color: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
        }
        .star-rating {
            display: flex;
            gap: 5px;
            margin: 10px 0;
        }
        .star-rating i {
            color: var(--gray-light);
            cursor: pointer;
            font-size: 1.5rem;
            transition: var(--transition);
        }
        .star-rating i.active, .star-rating i:hover {
            color: #FFC107;
        }
        .article-link {
            display: inline-block;
            background-color: #F1F8E9;
            color: var(--primary-dark);
            padding: 8px 15px;
            border-radius: 50px;
            margin: 5px 10px 5px 0;
            font-weight: 500;
            border: 1px solid #C5E1A5;
            transition: var(--transition);
        }
        .article-link:hover {
            background-color: var(--primary);
            color: white;
            transform: scale(1.05);
        }
        .article-img {
            width: 100%;
            border-radius: var(--border-radius);
            margin: 2.5rem auto;
            box-shadow: var(--shadow);
            overflow: hidden;
        }
        .img-caption {
            text-align: center;
            font-style: italic;
            color: var(--gray);
            padding: 10px;
            font-size: 0.9rem;
        }
        footer {
            background-color: var(--dark);
            color: white;
            padding: 50px 0 20px;
            margin-top: 50px;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-section h3 {
            color: white;
            margin-bottom: 25px;
            font-size: 1.3rem;
        }
        friend-link {
            display: block;
            margin-bottom: 15px;
        }
        friend-link a {
            color: #BBBBBB;
        }
        friend-link a:hover {
            color: white;
            padding-left: 5px;
        }
        .copyright {
            text-align: center;
            padding-top: 25px;
            border-top: 1px solid #444;
            color: #BBBBBB;
            font-size: 0.9rem;
        }
        .update-time {
            background-color: #FFF8E1;
            padding: 15px;
            border-radius: var(--border-radius);
            margin-top: 30px;
            text-align: center;
            font-weight: 600;
            color: var(--dark);
        }
        @media (max-width: 992px) {
            main {
                grid-template-columns: 1fr;
            }
            .sidebar {
                position: static;
            }
            h1 {
                font-size: 2.4rem;
            }
        }
        @media (max-width: 768px) {
            .nav-desktop {
                display: none;
            }
            .hamburger {
                display: block;
            }
            .header-inner {
                padding: 12px 0;
            }
            .content-area {
                padding: 25px;
            }
            .stats {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 576px) {
            .container {
                padding: 0 15px;
            }
            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.7rem;
            }
            .feature-box {
                padding: 20px;
            }
        }