*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; font-size: 16px; }
        body {
            font-family: 'Segoe UI', Roboto, system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
            background: #f0f4e8;
            color: #1e2a1e;
            line-height: 1.7;
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }
        a { color: #2d6a2d; text-decoration: none; transition: color 0.2s; }
        a:hover { color: #4caf50; text-decoration: underline; }
        img { max-width: 100%; height: auto; display: block; border-radius: 12px; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.25; color: #1a3b1a; font-weight: 700; }
        h1 { font-size: 2.2rem; margin-bottom: 0.5rem; }
        h2 { font-size: 1.7rem; margin-top: 2.5rem; margin-bottom: 0.75rem; border-left: 5px solid #4caf50; padding-left: 1rem; }
        h3 { font-size: 1.3rem; margin-top: 1.8rem; margin-bottom: 0.5rem; }
        h4 { font-size: 1.1rem; margin-top: 1.2rem; margin-bottom: 0.3rem; font-weight: 600; }
        p { margin-bottom: 1.1rem; }
        ul, ol { margin: 0.6rem 0 1.2rem 1.8rem; }
        li { margin-bottom: 0.3rem; }
        strong { color: #1e4a1e; font-weight: 700; }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 1.2rem; }
        .site-header {
            background: linear-gradient(145deg, #1d3b1d 0%, #2a5e2a 100%);
            color: #fff;
            padding: 0.8rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 20px rgba(0,0,0,0.25);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 1.7rem;
            font-weight: 800;
            color: #fdd835;
            letter-spacing: 1px;
            text-shadow: 0 2px 8px rgba(0,0,0,0.4);
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }
        .my-logo i { font-size: 2rem; color: #81c784; }
        .my-logo:hover { color: #ffeb3b; text-decoration: none; }
        .my-logo span { font-size: 0.9rem; font-weight: 400; color: #c8e6c9; display: block; }
        .nav-toggle { display: none; background: none; border: none; color: #fff; font-size: 1.8rem; cursor: pointer; padding: 0.3rem 0.6rem; border-radius: 6px; transition: background 0.2s; }
        .nav-toggle:hover { background: rgba(255,255,255,0.15); }
        .main-nav { display: flex; gap: 0.2rem; flex-wrap: wrap; align-items: center; }
        .main-nav a {
            color: #e8f5e9;
            padding: 0.5rem 1rem;
            border-radius: 30px;
            font-weight: 500;
            font-size: 0.9rem;
            transition: all 0.2s;
            white-space: nowrap;
        }
        .main-nav a:hover, .main-nav a.active { background: rgba(255,255,255,0.18); color: #fff; text-decoration: none; }
        .main-nav a i { margin-right: 0.3rem; }
        .breadcrumb {
            background: #e8f0e3;
            padding: 0.6rem 0;
            font-size: 0.85rem;
            color: #3e5a3e;
            border-bottom: 1px solid #c8dcc8;
        }
        .breadcrumb a { color: #2d6a2d; }
        .breadcrumb a:hover { text-decoration: underline; }
        .breadcrumb span { margin: 0 0.3rem; }
        .hero {
            background: linear-gradient(135deg, #1b3b1b 0%, #3a7a3a 100%);
            color: #fff;
            padding: 2.5rem 0 2rem;
            text-align: center;
            margin-bottom: 1.5rem;
            border-radius: 0 0 40px 40px;
        }
        .hero h1 { color: #fdd835; font-size: 2.6rem; text-shadow: 0 3px 12px rgba(0,0,0,0.3); }
        .hero p { font-size: 1.1rem; max-width: 750px; margin: 0.7rem auto 0; color: #dcedc8; }
        .hero .updated { font-size: 0.85rem; color: #aed581; margin-top: 0.8rem; }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2rem;
            padding: 1.5rem 0 3rem;
        }
        .main-content { min-width: 0; }
        .sidebar {
            background: #ffffff;
            border-radius: 20px;
            padding: 1.5rem 1.2rem;
            box-shadow: 0 8px 30px rgba(0,0,0,0.06);
            height: fit-content;
            position: sticky;
            top: 5.5rem;
        }
        .sidebar h3 { font-size: 1rem; margin-top: 0; border-bottom: 2px solid #c8e6c9; padding-bottom: 0.5rem; }
        .sidebar ul { list-style: none; margin: 0.8rem 0 0; }
        .sidebar li { margin-bottom: 0.5rem; }
        .sidebar a { display: flex; align-items: center; gap: 0.5rem; padding: 0.3rem 0; font-size: 0.9rem; }
        .sidebar a i { width: 1.2rem; color: #4caf50; }
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 1.2rem;
            margin: 1.5rem 0;
        }
        .feature-card {
            background: #fff;
            border-radius: 16px;
            padding: 1.3rem 1rem;
            box-shadow: 0 4px 16px rgba(0,0,0,0.05);
            transition: transform 0.2s, box-shadow 0.2s;
            text-align: center;
            border: 1px solid #e0ece0;
        }
        .feature-card:hover { transform: translateY(-4px); box-shadow: 0 12px 32px rgba(0,0,0,0.08); }
        .feature-card i { font-size: 2.2rem; color: #4caf50; margin-bottom: 0.5rem; }
        .feature-card h4 { margin: 0.3rem 0 0.4rem; font-size: 1rem; }
        .feature-card p { font-size: 0.85rem; color: #3e5a3e; margin: 0; }
        .tip-box {
            background: #e8f5e9;
            border-left: 5px solid #4caf50;
            padding: 1rem 1.3rem;
            border-radius: 0 12px 12px 0;
            margin: 1.2rem 0;
        }
        .interaction-area {
            background: #fff;
            border-radius: 20px;
            padding: 2rem 1.8rem;
            margin: 2.5rem 0;
            box-shadow: 0 8px 30px rgba(0,0,0,0.05);
        }
        .interaction-area h2 { margin-top: 0; border-left-color: #81c784; }
        .form-group { margin-bottom: 1rem; }
        .form-group label { display: block; font-weight: 600; margin-bottom: 0.3rem; color: #1e3a1e; }
        .form-group input, .form-group textarea, .form-group select {
            width: 100%;
            padding: 0.7rem 1rem;
            border: 2px solid #dce8dc;
            border-radius: 10px;
            font-size: 1rem;
            font-family: inherit;
            background: #f9fbf9;
            transition: border 0.2s;
        }
        .form-group input:focus, .form-group textarea:focus { border-color: #4caf50; outline: none; }
        .form-group textarea { resize: vertical; min-height: 100px; }
        .btn {
            background: #2d6a2d;
            color: #fff;
            border: none;
            padding: 0.7rem 2rem;
            border-radius: 30px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.2s, transform 0.1s;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
        }
        .btn:hover { background: #1e4a1e; transform: scale(1.02); }
        .btn i { font-size: 1rem; }
        .rating-stars { display: flex; gap: 0.3rem; font-size: 1.8rem; cursor: pointer; color: #ccc; }
        .rating-stars .star { transition: color 0.15s; }
        .rating-stars .star.active, .rating-stars .star:hover { color: #fdd835; }
        .site-footer {
            background: #1a2e1a;
            color: #c8e6c9;
            padding: 2rem 0 1.2rem;
            margin-top: auto;
            font-size: 0.9rem;
        }
        .footer-inner { display: grid; grid-template-columns: 2fr 1fr; gap: 2rem; }
        .site-footer a { color: #aed581; }
        .site-footer a:hover { color: #dcedc8; }
        .footer-copyright { text-align: center; border-top: 1px solid #2e4e2e; padding-top: 1rem; margin-top: 1.5rem; color: #8aaa8a; }
        friend-link { display: block; margin: 0.5rem 0; }
        friend-link a { display: inline-block; margin-right: 1rem; padding: 0.2rem 0; }
        @media (max-width: 900px) {
            .content-grid { grid-template-columns: 1fr; }
            .sidebar { position: static; margin-top: 2rem; }
            .hero h1 { font-size: 2rem; }
            .footer-inner { grid-template-columns: 1fr; }
        }
        @media (max-width: 680px) {
            .nav-toggle { display: block; }
            .main-nav {
                display: none;
                width: 100%;
                flex-direction: column;
                background: #1d3b1d;
                padding: 0.8rem 0;
                border-radius: 0 0 16px 16px;
                margin-top: 0.6rem;
            }
            .main-nav.open { display: flex; }
            .main-nav a { padding: 0.7rem 1.2rem; border-radius: 0; width: 100%; }
            .hero h1 { font-size: 1.6rem; }
            .hero p { font-size: 0.95rem; }
            h2 { font-size: 1.3rem; }
            .interaction-area { padding: 1.2rem 1rem; }
        }
        @media (max-width: 480px) {
            .my-logo { font-size: 1.3rem; }
            .my-logo span { font-size: 0.7rem; }
            .container { padding: 0 0.9rem; }
            .feature-grid { grid-template-columns: 1fr 1fr; }
        }
        .text-small { font-size: 0.85rem; color: #4a6a4a; }
        .mt-1 { margin-top: 1rem; }
        .mb-1 { margin-bottom: 1rem; }
        .flex-between { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 0.5rem; }