* { margin: 0; padding: 0; box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
            line-height: 1.7;
            color: #333;
            background: linear-gradient(135deg, #f5f7fa 0%, #e4e8ed 100%);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        a { color: #d72323; text-decoration: none; transition: color 0.3s ease, transform 0.2s ease; }
        a:hover { color: #a81a1a; transform: translateY(-1px); }
        img { max-width: 100%; height: auto; display: block; }
        ul, ol { padding-left: 1.5em; margin-bottom: 1.5rem; }
        section { padding: 3rem 1rem; }
        h1, h2, h3, h4 { font-family: 'Arial Black', Gadget, sans-serif; color: #1a1a2e; margin-bottom: 1rem; line-height: 1.3; }
        h1 { font-size: clamp(2.5rem, 5vw, 4rem); text-align: center; border-bottom: 5px solid #d72323; padding-bottom: 1rem; margin-bottom: 2rem; }
        h2 { font-size: clamp(1.8rem, 4vw, 2.8rem); margin-top: 3rem; padding-left: 0.5rem; border-left: 4px solid #d72323; }
        h3 { font-size: clamp(1.5rem, 3vw, 2.2rem); color: #2d4059; margin-top: 2rem; }
        h4 { font-size: 1.3rem; color: #4a4a4a; margin-top: 1.5rem; }
        p { margin-bottom: 1.5rem; font-size: 1.1rem; }
        .lead { font-size: 1.3rem; font-weight: 300; color: #555; text-align: center; max-width: 900px; margin: 0 auto 3rem; }
        .highlight { background-color: #fffacd; padding: 0.2em 0.5em; border-radius: 3px; font-weight: bold; }
        .updated { text-align: center; font-size: 0.9rem; color: #777; margin-bottom: 2rem; font-style: italic; }
        .site-header {
            background: linear-gradient(to right, #1a1a2e, #2d4059);
            color: white;
            padding: 1rem;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            max-width: 1400px;
            margin: 0 auto;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }
        .my-logo {
            font-family: 'Arial Black', sans-serif;
            font-size: 2rem;
            color: #d72323;
            text-transform: uppercase;
            letter-spacing: 2px;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
        }
        .my-logo:hover { transform: scale(1.05); }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 1.5rem;
        }
        .main-nav a {
            color: #fff;
            font-weight: bold;
            padding: 0.5rem 0;
            border-bottom: 2px solid transparent;
        }
        .main-nav a:hover { border-bottom-color: #d72323; color: #d72323; }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            color: white;
            cursor: pointer;
        }
        .breadcrumb {
            max-width: 1400px;
            margin: 1rem auto;
            padding: 0 1rem;
            font-size: 0.9rem;
            color: #666;
        }
        .breadcrumb a { color: #666; }
        .breadcrumb a:hover { color: #d72323; }
        .main-content {
            flex: 1;
            max-width: 1400px;
            margin: 0 auto;
            width: 100%;
            padding: 0 1rem;
        }
        .article-body {
            background: white;
            border-radius: 12px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.08);
            padding: 3rem;
            margin-bottom: 3rem;
        }
        .feature-img {
            width: 100%;
            max-height: 500px;
            object-fit: cover;
            border-radius: 8px;
            margin: 2rem 0;
            box-shadow: 0 8px 20px rgba(0,0,0,0.15);
        }
        .interactive-box {
            background: #f8f9fa;
            border-left: 5px solid #2d4059;
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 8px 8px 0;
        }
        .feature-section {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
            margin: 3rem 0;
        }
        .feature-card {
            background: white;
            border-radius: 10px;
            padding: 2rem;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            text-align: center;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        .feature-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 12px 25px rgba(0,0,0,0.1);
        }
        .feature-card h3 { margin-top: 0; }
        .feature-icon { font-size: 2.5rem; color: #d72323; margin-bottom: 1rem; }
        form { display: flex; flex-direction: column; gap: 1rem; }
        input, textarea, select {
            padding: 0.8rem;
            border: 1px solid #ddd;
            border-radius: 6px;
            font-size: 1rem;
            transition: border 0.3s;
        }
        input:focus, textarea:focus, select:focus {
            outline: none;
            border-color: #d72323;
            box-shadow: 0 0 0 3px rgba(215, 35, 35, 0.1);
        }
        button {
            background: linear-gradient(to right, #d72323, #a81a1a);
            color: white;
            border: none;
            padding: 0.9rem 1.5rem;
            border-radius: 6px;
            font-weight: bold;
            cursor: pointer;
            transition: background 0.3s, transform 0.2s;
        }
        button:hover {
            background: linear-gradient(to right, #a81a1a, #8b1515);
            transform: scale(1.03);
        }
        .star-rating {
            display: flex;
            justify-content: center;
            gap: 0.5rem;
            margin: 1rem 0;
            font-size: 1.8rem;
            color: #ffc107;
        }
        .star-rating label { cursor: pointer; }
        .site-footer {
            background: #1a1a2e;
            color: #ccc;
            padding: 3rem 1rem;
            margin-top: auto;
        }
        .footer-container {
            max-width: 1400px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
        }
        .footer-logo { font-size: 1.8rem; color: #d72323; margin-bottom: 1rem; }
        .footer-section h4 { color: #fff; margin-bottom: 1rem; border-bottom: 2px solid #d72323; padding-bottom: 0.5rem; }
        .footer-links { list-style: none; }
        .footer-links li { margin-bottom: 0.7rem; }
        .footer-links a { color: #aaa; }
        .footer-links a:hover { color: #d72323; padding-left: 5px; }
        friend-link {
            display: block;
            background: #2d4059;
            padding: 1rem;
            border-radius: 6px;
            margin-top: 1rem;
        }
        .copyright {
            text-align: center;
            margin-top: 3rem;
            padding-top: 2rem;
            border-top: 1px solid #2d4059;
            font-size: 0.9rem;
            color: #888;
        }
        @media (max-width: 768px) {
            .hamburger { display: block; }
            .main-nav ul {
                display: none;
                flex-direction: column;
                width: 100%;
                background: #2d4059;
                position: absolute;
                top: 100%;
                left: 0;
                padding: 1rem;
                box-shadow: 0 10px 15px rgba(0,0,0,0.2);
            }
            .main-nav.active ul { display: flex; }
            .article-body { padding: 1.5rem; }
            .header-container { flex-direction: column; align-items: flex-start; }
            .my-logo { margin-bottom: 1rem; }
            .feature-section { grid-template-columns: 1fr; }
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.8rem; }
        }