* { margin: 0; padding: 0; box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            color: #333;
            background: linear-gradient(135deg, #f5f7fa 0%, #e4edf5 100%);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        a { color: #2c5aa0; text-decoration: none; transition: color 0.3s; }
        a:hover { color: #1a3d6d; text-decoration: underline; }
        img { max-width: 100%; height: auto; display: block; }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header { background: #1a3d6d; color: white; padding: 1rem 0; box-shadow: 0 4px 12px rgba(0,0,0,0.1); }
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: bold;
            color: #ffcc00;
            text-transform: uppercase;
            letter-spacing: 1px;
            display: flex;
            align-items: center;
        }
        .my-logo i { margin-right: 10px; }
        .my-logo:hover { color: white; }
        nav { display: flex; align-items: center; }
        .nav-links {
            display: flex;
            list-style: none;
            gap: 1.5rem;
        }
        .nav-links a {
            color: white;
            font-weight: 500;
            padding: 0.5rem 0.8rem;
            border-radius: 4px;
        }
        .nav-links a:hover { background: rgba(255,255,255,0.2); text-decoration: none; }
        .hamburger {
            display: none;
            font-size: 1.5rem;
            cursor: pointer;
            color: white;
            background: none;
            border: none;
        }
        .breadcrumb {
            background: #e9f0f8; padding: 0.8rem 20px; margin-top: 1px; font-size: 0.9rem;
        }
        .breadcrumb a { color: #555; }
        .breadcrumb a:hover { color: #1a3d6d; }
        main { flex: 1; padding: 2rem 0; }
        article {
            background: white;
            padding: 2.5rem;
            border-radius: 12px;
            box-shadow: 0 6px 20px rgba(0,0,0,0.08);
            margin-bottom: 2rem;
        }
        h1 { color: #1a3d6d; font-size: 2.5rem; margin-bottom: 1.5rem; border-bottom: 3px solid #ffcc00; padding-bottom: 0.5rem; }
        h2 { color: #2c5aa0; font-size: 2rem; margin: 2rem 0 1rem; padding-top: 1rem; border-top: 1px dashed #ccc; }
        h3 { color: #3a6bc2; font-size: 1.6rem; margin: 1.5rem 0 0.8rem; }
        h4 { color: #4a7cd4; font-size: 1.3rem; margin: 1.2rem 0 0.6rem; }
        p { margin-bottom: 1.2rem; text-align: justify; line-height: 1.7; }
        .highlight { background: #fff9e6; padding: 1rem; border-left: 4px solid #ffcc00; margin: 1.5rem 0; }
        .emoji { font-size: 1.2em; margin-right: 5px; }
        .keyword { font-weight: bold; color: #1a3d6d; }
        .update-time { color: #666; font-style: italic; margin-bottom: 1.5rem; padding-bottom: 1rem; border-bottom: 1px solid #eee; }
        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 1.5rem;
            margin: 2rem 0;
        }
        .feature-card {
            background: #f8fafd;
            padding: 1.5rem;
            border-radius: 8px;
            border: 1px solid #dce5f0;
            transition: transform 0.3s, box-shadow 0.3s;
        }
        .feature-card:hover { transform: translateY(-5px); box-shadow: 0 8px 16px rgba(0,0,0,0.1); }
        .feature-card i { color: #2c5aa0; font-size: 2rem; margin-bottom: 1rem; }
        .form-section { margin: 2.5rem 0; padding: 2rem; background: #f0f7ff; border-radius: 10px; }
        .form-group { margin-bottom: 1.2rem; }
        label { display: block; margin-bottom: 0.5rem; font-weight: 600; color: #333; }
        input, textarea, select {
            width: 100%;
            padding: 0.8rem;
            border: 1px solid #b0c4de;
            border-radius: 6px;
            font-size: 1rem;
            transition: border 0.3s;
        }
        input:focus, textarea:focus, select:focus { border-color: #2c5aa0; outline: none; }
        button {
            background: #2c5aa0;
            color: white;
            border: none;
            padding: 0.9rem 1.8rem;
            border-radius: 6px;
            cursor: pointer;
            font-size: 1rem;
            font-weight: 600;
            transition: background 0.3s;
        }
        button:hover { background: #1a3d6d; }
        .rating { display: flex; gap: 0.5rem; margin: 1rem 0; }
        .rating input { display: none; }
        .rating label { font-size: 1.8rem; color: #ccc; cursor: pointer; }
        .rating input:checked ~ label { color: #ffcc00; }
        footer {
            background: #1a3d6d;
            color: white;
            padding: 2rem 0;
            margin-top: auto;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
        }
        .footer-section h3 { color: #ffcc00; border: none; padding: 0; }
        .footer-links { list-style: none; }
        .footer-links li { margin-bottom: 0.8rem; }
        .footer-links a { color: #d0dfff; }
        .footer-links a:hover { color: white; }
        friend-link {
            display: block;
            background: #2c5aa0;
            padding: 1rem;
            border-radius: 6px;
            margin: 1rem 0;
            font-weight: bold;
        }
        friend-link a { color: white; }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #2c5aa0;
            margin-top: 1.5rem;
            font-size: 0.9rem;
            color: #b0c4de;
        }
        @media (max-width: 768px) {
            .header-content { flex-direction: column; align-items: flex-start; }
            .nav-links {
                flex-direction: column;
                width: 100%;
                display: none;
                margin-top: 1rem;
            }
            .nav-links.active { display: flex; }
            .hamburger { display: block; }
            h1 { font-size: 2rem; }
            h2 { font-size: 1.7rem; }
            article { padding: 1.5rem; }
            .features-grid { grid-template-columns: 1fr; }
        }