* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.8;
            color: #333;
            background: linear-gradient(135deg, #f9f9f9 0%, #e6f0ff 100%);
            min-height: 100vh;
        }
        a {
            text-decoration: none;
            color: #2c5aa0;
            transition: color 0.3s ease;
        }
        a:hover {
            color: #ff9900;
        }
        ul, ol {
            padding-left: 2rem;
            margin: 1rem 0;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        header {
            background: linear-gradient(90deg, #1a237e 0%, #283593 50%, #3949ab 100%);
            color: white;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-top {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1rem 1.5rem;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 900;
            letter-spacing: 1.5px;
            color: #ffd700;
            text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
        }
        .my-logo:hover {
            color: #fff;
        }
        .search-form {
            display: flex;
            gap: 0.5rem;
        }
        .search-input {
            padding: 0.7rem 1rem;
            border: none;
            border-radius: 30px;
            width: 250px;
            font-size: 1rem;
            outline: none;
        }
        .search-btn {
            background: #ff9900;
            color: white;
            border: none;
            border-radius: 50%;
            width: 45px;
            height: 45px;
            cursor: pointer;
            transition: background 0.3s ease;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .search-btn:hover {
            background: #ff6600;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
        }
        nav {
            background: #3949ab;
            padding: 0.8rem 1.5rem;
        }
        .nav-links {
            display: flex;
            justify-content: center;
            gap: 2.5rem;
            list-style: none;
        }
        .nav-links a {
            color: white;
            font-weight: 600;
            padding: 0.5rem 1rem;
            border-radius: 5px;
            transition: background 0.3s ease;
        }
        .nav-links a:hover {
            background: rgba(255, 255, 255, 0.2);
        }
        .mobile-nav {
            display: none;
            flex-direction: column;
            background: #283593;
            padding: 1rem;
            position: absolute;
            top: 100%;
            left: 0;
            width: 100%;
            z-index: 999;
        }
        .mobile-nav.active {
            display: flex;
        }
        .breadcrumb {
            padding: 1rem 1.5rem;
            background: #e8eaf6;
            font-size: 0.95rem;
        }
        .breadcrumb a {
            color: #555;
        }
        .breadcrumb span {
            color: #777;
        }
        main {
            padding: 2.5rem 1.5rem;
            background: white;
            border-radius: 15px;
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.08);
            margin: 2rem auto;
            max-width: 1100px;
        }
        h1 {
            font-size: 3rem;
            color: #1a237e;
            margin-bottom: 1.5rem;
            text-align: center;
            border-bottom: 4px solid #ffd700;
            padding-bottom: 1rem;
        }
        h2 {
            font-size: 2.2rem;
            color: #283593;
            margin: 2.5rem 0 1.2rem;
            padding-left: 0.8rem;
            border-left: 6px solid #ff9900;
        }
        h3 {
            font-size: 1.8rem;
            color: #3949ab;
            margin: 2rem 0 1rem;
        }
        h4 {
            font-size: 1.5rem;
            color: #5c6bc0;
            margin: 1.5rem 0 0.8rem;
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
            font-size: 1.1rem;
        }
        .highlight {
            background: #fff9c4;
            padding: 1.5rem;
            border-left: 5px solid #ffd700;
            margin: 2rem 0;
            border-radius: 0 10px 10px 0;
        }
        .emoji {
            font-size: 1.3rem;
            margin-right: 0.5rem;
        }
        .image-wrapper {
            text-align: center;
            margin: 2.5rem 0;
        }
        .image-wrapper img {
            border-radius: 12px;
            box-shadow: 0 8px 16px rgba(0, 0, 0, 0.15);
            max-width: 800px;
            margin: 0 auto;
        }
        .caption {
            font-style: italic;
            color: #666;
            margin-top: 0.8rem;
        }
        .user-functions {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2.5rem;
            margin: 3rem 0;
            padding: 2rem;
            background: #f1f8ff;
            border-radius: 12px;
        }
        .form-group {
            margin-bottom: 1.5rem;
        }
        .form-group label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
            color: #1a237e;
        }
        .form-control {
            width: 100%;
            padding: 0.9rem;
            border: 2px solid #c5cae9;
            border-radius: 8px;
            font-size: 1rem;
            transition: border 0.3s ease;
        }
        .form-control:focus {
            border-color: #3949ab;
            outline: none;
        }
        .btn {
            background: linear-gradient(90deg, #ff9800, #ff5722);
            color: white;
            border: none;
            padding: 1rem 2rem;
            border-radius: 30px;
            font-size: 1.1rem;
            font-weight: bold;
            cursor: pointer;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        .btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 6px 12px rgba(255, 87, 34, 0.4);
        }
        .rating {
            display: flex;
            gap: 0.5rem;
            align-items: center;
        }
        .star {
            font-size: 1.8rem;
            color: #ddd;
            cursor: pointer;
            transition: color 0.3s ease;
        }
        .star:hover,
        .star.active {
            color: #ffd700;
        }
        footer {
            background: linear-gradient(90deg, #1a237e, #283593);
            color: white;
            padding: 3rem 1.5rem 1.5rem;
            margin-top: 3rem;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2.5rem;
            margin-bottom: 2.5rem;
        }
        .footer-section h3 {
            color: #ffd700;
            border-bottom: 2px solid #ffd700;
            padding-bottom: 0.5rem;
            margin-bottom: 1.5rem;
        }
        friend-link {
            display: block;
            margin: 0.8rem 0;
            color: #c5cae9;
            transition: color 0.3s ease;
        }
        friend-link:hover {
            color: #ffd700;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #5c6bc0;
            color: #c5cae9;
            font-size: 0.95rem;
        }
        .update-time {
            color: #ffd700;
            font-weight: bold;
        }
        @media (max-width: 992px) {
            h1 { font-size: 2.5rem; }
            h2 { font-size: 2rem; }
            h3 { font-size: 1.6rem; }
            .search-input { width: 200px; }
        }
        @media (max-width: 768px) {
            .header-top {
                flex-wrap: wrap;
                gap: 1rem;
            }
            .hamburger {
                display: block;
            }
            .nav-links {
                display: none;
            }
            .mobile-nav.active {
                display: flex;
            }
            .search-form {
                order: 3;
                width: 100%;
                justify-content: center;
            }
            .search-input {
                width: 80%;
            }
            .user-functions {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 576px) {
            h1 { font-size: 2rem; }
            h2 { font-size: 1.7rem; }
            h3 { font-size: 1.4rem; }
            main { padding: 1.5rem; }
            .container { padding: 0 1rem; }
        }