* {
            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, #f5f7fa 0%, #c3cfe2 100%);
            padding: 0;
            margin: 0;
        }
        a {
            color: #4a90e2;
            text-decoration: none;
            transition: color 0.3s ease;
        }
        a:hover {
            color: #ff6b6b;
            text-decoration: underline;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: linear-gradient(90deg, #2c3e50, #4a6491);
            color: white;
            padding: 20px 0;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 2.5rem;
            font-weight: 900;
            text-transform: uppercase;
            letter-spacing: 2px;
            background: linear-gradient(45deg, #ff9a9e, #fad0c4);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.2);
            padding: 10px;
            border-radius: 10px;
            transition: transform 0.3s ease;
        }
        .my-logo:hover {
            transform: scale(1.05);
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            cursor: pointer;
            color: white;
            background: none;
            border: none;
        }
        nav {
            display: flex;
            align-items: center;
            gap: 30px;
        }
        .nav-links {
            display: flex;
            list-style: none;
            gap: 25px;
        }
        .nav-links a {
            color: white;
            font-weight: 600;
            font-size: 1.1rem;
            padding: 10px 15px;
            border-radius: 5px;
            transition: background 0.3s ease;
        }
        .nav-links a:hover {
            background: rgba(255,255,255,0.2);
        }
        .breadcrumb {
            padding: 15px 0;
            background: #ecf0f1;
            margin-bottom: 20px;
        }
        .breadcrumb ul {
            display: flex;
            list-style: none;
            gap: 10px;
        }
        .breadcrumb li:not(:last-child)::after {
            content: '>';
            margin-left: 10px;
            color: #7f8c8d;
        }
        main {
            background: white;
            border-radius: 20px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.1);
            padding: 40px;
            margin: 30px auto;
        }
        h1 {
            font-size: 3.5rem;
            color: #2c3e50;
            margin-bottom: 30px;
            text-align: center;
            border-bottom: 5px solid #4a90e2;
            padding-bottom: 20px;
            line-height: 1.2;
        }
        h2 {
            font-size: 2.5rem;
            color: #34495e;
            margin: 40px 0 20px;
            padding-left: 15px;
            border-left: 8px solid #ff9a9e;
        }
        h3 {
            font-size: 2rem;
            color: #4a6491;
            margin: 30px 0 15px;
        }
        h4 {
            font-size: 1.5rem;
            color: #7f8c8d;
            margin: 20px 0 10px;
        }
        p {
            margin-bottom: 25px;
            font-size: 1.2rem;
            text-align: justify;
            padding: 0 10px;
        }
        .highlight {
            background: linear-gradient(120deg, #a1c4fd 0%, #c2e9fb 100%);
            padding: 25px;
            border-radius: 15px;
            margin: 30px 0;
            border-left: 6px solid #4a90e2;
            font-weight: bold;
            color: #2c3e50;
        }
        emoji {
            font-size: 1.5rem;
            margin-right: 10px;
        }
        img {
            max-width: 100%;
            height: auto;
            border-radius: 15px;
            box-shadow: 0 8px 20px rgba(0,0,0,0.15);
            display: block;
            margin: 30px auto;
            transition: transform 0.5s ease;
        }
        img:hover {
            transform: scale(1.02);
        }
        .form-section {
            background: #f8f9fa;
            padding: 30px;
            border-radius: 15px;
            margin: 40px 0;
            border: 2px dashed #4a90e2;
        }
        .form-section h3 {
            color: #2c3e50;
        }
        form {
            display: grid;
            grid-template-columns: 1fr;
            gap: 20px;
            max-width: 800px;
            margin: 0 auto;
        }
        input, textarea, select {
            padding: 15px;
            border: 2px solid #bdc3c7;
            border-radius: 10px;
            font-size: 1.1rem;
            transition: border 0.3s ease;
        }
        input:focus, textarea:focus, select:focus {
            border-color: #4a90e2;
            outline: none;
        }
        button {
            padding: 15px 30px;
            background: linear-gradient(45deg, #4a90e2, #2c3e50);
            color: white;
            border: none;
            border-radius: 10px;
            font-size: 1.2rem;
            cursor: pointer;
            transition: background 0.3s ease, transform 0.3s ease;
        }
        button:hover {
            background: linear-gradient(45deg, #2c3e50, #4a90e2);
            transform: translateY(-3px);
        }
        .rating {
            display: flex;
            gap: 10px;
            align-items: center;
            justify-content: center;
            margin: 20px 0;
        }
        .star {
            font-size: 2rem;
            color: #f1c40f;
            cursor: pointer;
            transition: color 0.3s ease;
        }
        .star:hover, .star.active {
            color: #ff9a00;
        }
        footer {
            background: #2c3e50;
            color: white;
            padding: 40px 0;
            margin-top: 50px;
            text-align: center;
        }
        friend-link {
            display: block;
            font-size: 1.5rem;
            margin: 20px 0;
            padding: 20px;
            background: rgba(255,255,255,0.1);
            border-radius: 10px;
        }
        friend-link a {
            color: #a1c4fd;
            margin: 0 15px;
        }
        .copyright {
            margin-top: 30px;
            font-size: 1rem;
            color: #bdc3c7;
            border-top: 1px solid #7f8c8d;
            padding-top: 20px;
        }
        @media (max-width: 768px) {
            .header-content {
                flex-direction: column;
                align-items: flex-start;
            }
            .hamburger {
                display: block;
                position: absolute;
                top: 25px;
                right: 20px;
            }
            nav {
                width: 100%;
                flex-direction: column;
                display: none;
            }
            nav.active {
                display: flex;
            }
            .nav-links {
                flex-direction: column;
                width: 100%;
                gap: 10px;
                margin-top: 20px;
            }
            h1 {
                font-size: 2.5rem;
            }
            h2 {
                font-size: 2rem;
            }
            h3 {
                font-size: 1.7rem;
            }
            p {
                font-size: 1.1rem;
            }
            .container {
                padding: 0 15px;
            }
            main {
                padding: 25px;
            }
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 40px;
        }
        @media (min-width: 992px) {
            .content-grid {
                grid-template-columns: 2fr 1fr;
            }
            .sidebar {
                padding-left: 30px;
                border-left: 3px solid #ecf0f1;
            }
        }
        .update-time {
            text-align: right;
            font-style: italic;
            color: #7f8c8d;
            margin-bottom: 20px;
            font-size: 1rem;
        }