* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: #333;
            background-color: #fef9e7;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 15px;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: #d35400;
            text-decoration: none;
            transition: color 0.3s ease;
        }
        a:hover {
            color: #a04000;
            text-decoration: underline;
        }
        .container {
            width: 100%;
            padding-right: 15px;
            padding-left: 15px;
            margin-right: auto;
            margin-left: auto;
        }
        header {
            background: linear-gradient(135deg, #f8c471 0%, #e67e22 100%);
            padding: 1.5rem 0;
            border-bottom: 5px solid #ba4a00;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
            margin-bottom: 2rem;
            border-radius: 0 0 12px 12px;
        }
        .logo-nav-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 800;
            color: #fff;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
            background: #a04000;
            padding: 10px 20px;
            border-radius: 10px;
            transition: transform 0.3s ease, background 0.3s ease;
        }
        .my-logo:hover {
            transform: scale(1.05);
            background: #8b3500;
            text-decoration: none;
        }
        .main-nav {
            display: flex;
        }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 1.5rem;
        }
        .main-nav a {
            color: #fff;
            font-weight: 600;
            padding: 8px 12px;
            border-radius: 6px;
            background-color: rgba(255, 255, 255, 0.15);
        }
        .main-nav a:hover {
            background-color: rgba(255, 255, 255, 0.3);
            text-decoration: none;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            color: white;
            background: none;
            border: none;
            cursor: pointer;
        }
        .breadcrumb {
            margin: 1.5rem 0;
            font-size: 0.9rem;
            color: #7d6608;
        }
        .breadcrumb a {
            color: #d35400;
        }
        .user-interaction {
            background: #fff;
            padding: 1.5rem;
            border-radius: 10px;
            margin: 2rem 0;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 1.5rem;
        }
        .interaction-box h3 {
            color: #a04000;
            margin-bottom: 1rem;
            border-left: 5px solid #f8c471;
            padding-left: 10px;
        }
        .interaction-box input,
        .interaction-box textarea,
        .interaction-box select {
            width: 100%;
            padding: 12px;
            margin-bottom: 12px;
            border: 2px solid #f8c471;
            border-radius: 8px;
            font-size: 1rem;
            transition: border 0.3s ease;
        }
        .interaction-box input:focus,
        .interaction-box textarea:focus {
            border-color: #e67e22;
            outline: none;
        }
        .interaction-box button {
            background: linear-gradient(to right, #f8c471, #e67e22);
            color: white;
            border: none;
            padding: 12px 25px;
            border-radius: 8px;
            font-weight: bold;
            cursor: pointer;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        .interaction-box button:hover {
            transform: translateY(-3px);
            box-shadow: 0 5px 15px rgba(230, 126, 34, 0.4);
        }
        .star-rating {
            display: flex;
            gap: 8px;
            margin: 15px 0;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            font-size: 1.8rem;
            color: #ddd;
            cursor: pointer;
            transition: color 0.2s;
        }
        .star-rating input:checked ~ label,
        .star-rating label:hover,
        .star-rating label:hover ~ label {
            color: #f39c12;
        }
        main {
            background: white;
            padding: 2.5rem;
            border-radius: 15px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.08);
            margin-bottom: 3rem;
        }
        h1 {
            color: #a04000;
            font-size: 2.8rem;
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-bottom: 3px dashed #f8c471;
            padding-bottom: 15px;
        }
        h2 {
            color: #ba4a00;
            font-size: 2rem;
            margin: 2.5rem 0 1.2rem 0;
            padding: 10px 0;
            border-left: 6px solid #f8c471;
            padding-left: 15px;
        }
        h3 {
            color: #d35400;
            font-size: 1.6rem;
            margin: 2rem 0 1rem 0;
        }
        h4 {
            color: #e67e22;
            font-size: 1.3rem;
            margin: 1.5rem 0 0.8rem 0;
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
            font-size: 1.1rem;
        }
        .lead {
            font-size: 1.3rem;
            color: #5d6d7e;
            font-weight: 500;
            background: #fef9e7;
            padding: 1.2rem;
            border-radius: 10px;
            border-left: 5px solid #f8c471;
            margin-bottom: 2rem;
        }
        .highlight {
            background-color: #fff3cd;
            border-left: 5px solid #ffc107;
            padding: 1rem;
            margin: 1.5rem 0;
            border-radius: 0 8px 8px 0;
        }
        .content-img {
            max-width: 800px;
            margin: 2rem auto;
            border: 5px solid #f8c471;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 8px 20px rgba(0,0,0,0.1);
        }
        .img-caption {
            text-align: center;
            font-style: italic;
            color: #7d6608;
            padding: 10px;
            background: #fef9e7;
        }
        .key-term {
            font-weight: bold;
            color: #a04000;
        }
        .related-link {
            display: inline-block;
            background: #fef9e7;
            padding: 5px 10px;
            margin: 5px;
            border-radius: 5px;
            border: 1px dashed #f8c471;
        }
        .update-time {
            text-align: right;
            font-size: 0.9rem;
            color: #7d6608;
            margin-top: 3rem;
            padding-top: 1rem;
            border-top: 1px solid #eee;
        }
        footer {
            background: linear-gradient(to right, #2c3e50, #34495e);
            color: #ecf0f1;
            padding: 3rem 2rem;
            border-radius: 12px 12px 0 0;
            margin-top: 4rem;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2.5rem;
            margin-bottom: 2.5rem;
        }
        .footer-section h4 {
            color: #f8c471;
            margin-bottom: 1.2rem;
            font-size: 1.4rem;
        }
        .friend-links {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 1rem;
        }
        .friend-link {
            background: rgba(255,255,255,0.1);
            padding: 8px 15px;
            border-radius: 6px;
            transition: background 0.3s ease;
        }
        .friend-link:hover {
            background: rgba(248, 196, 113, 0.3);
            text-decoration: none;
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            border-top: 1px solid #5d6d7e;
            color: #bdc3c7;
            font-size: 0.95rem;
        }
        @media (max-width: 992px) {
            h1 { font-size: 2.4rem; }
            h2 { font-size: 1.8rem; }
            .main-nav ul {
                gap: 1rem;
            }
        }
        @media (max-width: 768px) {
            .logo-nav-container {
                flex-direction: column;
                align-items: flex-start;
            }
            .my-logo {
                margin-bottom: 1.5rem;
                font-size: 1.8rem;
            }
            .hamburger {
                display: block;
                position: absolute;
                top: 30px;
                right: 20px;
            }
            .main-nav {
                width: 100%;
                display: none;
            }
            .main-nav.active {
                display: block;
            }
            .main-nav ul {
                flex-direction: column;
                gap: 0.8rem;
                margin-top: 1rem;
            }
            .main-nav a {
                display: block;
                padding: 12px;
                background-color: rgba(255, 255, 255, 0.2);
            }
            .user-interaction {
                grid-template-columns: 1fr;
            }
            main {
                padding: 1.5rem;
            }
            .footer-content {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 480px) {
            h1 { font-size: 2rem; }
            h2 { font-size: 1.6rem; }
            body {
                padding: 0 10px;
            }
            .interaction-box button {
                width: 100%;
            }
        }