* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            color: #333;
            background-color: #f8f9fa;
            overflow-x: hidden;
        }
        a {
            text-decoration: none;
            color: inherit;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: linear-gradient(135deg, #1e3c72, #2a5298);
            color: white;
            padding: 1rem 0;
            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;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 900;
            text-transform: uppercase;
            letter-spacing: 2px;
            background: linear-gradient(to right, #ff7e5f, #feb47b);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            transition: transform 0.3s ease;
        }
        .my-logo:hover {
            transform: scale(1.05);
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            cursor: pointer;
            background: none;
            border: none;
            color: white;
        }
        nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        nav a {
            padding: 0.5rem 1rem;
            border-radius: 5px;
            transition: background 0.3s ease, color 0.3s ease;
            font-weight: 600;
        }
        nav a:hover {
            background: rgba(255, 255, 255, 0.2);
            color: #ffcc00;
        }
        .breadcrumb {
            padding: 1rem 0;
            font-size: 0.9rem;
            color: #ddd;
        }
        .breadcrumb a {
            color: #ffcc00;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        main {
            padding: 2rem 0;
            background: white;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            margin: 2rem auto;
        }
        article {
            padding: 0 2rem;
        }
        h1 {
            font-size: 3rem;
            color: #1e3c72;
            margin-bottom: 1.5rem;
            text-align: center;
            border-bottom: 3px solid #ff7e5f;
            padding-bottom: 1rem;
        }
        h2 {
            font-size: 2.2rem;
            color: #2a5298;
            margin: 2rem 0 1rem;
            border-left: 5px solid #feb47b;
            padding-left: 1rem;
        }
        h3 {
            font-size: 1.8rem;
            color: #4a6fa5;
            margin: 1.5rem 0 0.8rem;
        }
        h4 {
            font-size: 1.4rem;
            color: #666;
            margin: 1.2rem 0 0.6rem;
        }
        p {
            margin-bottom: 1.2rem;
            text-align: justify;
            line-height: 1.8;
        }
        .lead {
            font-size: 1.2rem;
            font-weight: bold;
            color: #444;
            background: #f1f8ff;
            padding: 1rem;
            border-radius: 8px;
            border-left: 4px solid #2a5298;
        }
        .highlight {
            background: linear-gradient(120deg, #ffcc00 0%, #ffcc00 100%);
            background-repeat: no-repeat;
            background-size: 100% 0.4em;
            background-position: 0 88%;
            font-weight: bold;
            padding: 0 2px;
        }
        emoji {
            font-size: 1.2rem;
            margin-right: 5px;
        }
        .content-img {
            float: right;
            margin: 1rem 0 1rem 2rem;
            border-radius: 10px;
            box-shadow: 0 8px 16px rgba(0, 0, 0, 0.1);
            max-width: 400px;
            border: 3px solid #2a5298;
        }
        .content-img:hover {
            transform: translateY(-5px);
            transition: transform 0.3s ease;
        }
        .link-list {
            background: #f0f8ff;
            padding: 1.5rem;
            border-radius: 10px;
            margin: 2rem 0;
        }
        .link-list ul {
            list-style: none;
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 1rem;
        }
        .link-list li {
            padding: 0.8rem;
            background: white;
            border-radius: 8px;
            border-left: 4px solid #1e3c72;
            transition: transform 0.2s ease;
        }
        .link-list li:hover {
            transform: translateX(5px);
            background: #e6f2ff;
        }
        .link-list a {
            color: #1e3c72;
            font-weight: 600;
        }
        .link-list a:hover {
            color: #ff7e5f;
        }
        .last-updated {
            text-align: right;
            font-style: italic;
            color: #777;
            margin-top: 2rem;
            padding-top: 1rem;
            border-top: 1px dashed #ccc;
        }
        .functions {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
            margin: 3rem 0;
            padding: 2rem;
            background: #f8f9fa;
            border-radius: 15px;
        }
        .function-box {
            background: white;
            padding: 1.5rem;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            text-align: center;
            transition: box-shadow 0.3s ease;
        }
        .function-box:hover {
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
        }
        .function-box i {
            font-size: 2.5rem;
            color: #2a5298;
            margin-bottom: 1rem;
        }
        .function-box h3 {
            font-size: 1.5rem;
            margin-bottom: 1rem;
        }
        .function-box form {
            display: flex;
            flex-direction: column;
            gap: 0.8rem;
        }
        .function-box input, .function-box textarea, .function-box select {
            padding: 0.8rem;
            border: 1px solid #ccc;
            border-radius: 5px;
            font-size: 1rem;
        }
        .function-box button {
            padding: 0.8rem;
            background: linear-gradient(135deg, #1e3c72, #2a5298);
            color: white;
            border: none;
            border-radius: 5px;
            cursor: pointer;
            font-weight: bold;
            transition: background 0.3s ease;
        }
        .function-box button:hover {
            background: linear-gradient(135deg, #2a5298, #3a6bc5);
        }
        footer {
            background: #1a1a2e;
            color: #ddd;
            padding: 2rem 0;
            margin-top: 3rem;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
        }
        .footer-section h4 {
            color: #ffcc00;
            margin-bottom: 1rem;
            font-size: 1.3rem;
        }
        friend-link {
            display: block;
            padding: 0.5rem 0;
            color: #66b3ff;
            transition: color 0.3s ease;
        }
        friend-link:hover {
            color: #ffcc00;
            text-decoration: underline;
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            border-top: 1px solid #444;
            font-size: 0.9rem;
            color: #aaa;
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
            nav ul {
                flex-direction: column;
                position: fixed;
                top: 70px;
                left: -100%;
                width: 100%;
                background: #1e3c72;
                padding: 2rem;
                transition: left 0.5s ease;
                z-index: 999;
            }
            nav ul.active {
                left: 0;
            }
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.8rem;
            }
            h3 {
                font-size: 1.5rem;
            }
            .content-img {
                float: none;
                margin: 1rem auto;
                max-width: 100%;
            }
            .functions {
                grid-template-columns: 1fr;
                padding: 1rem;
            }
            .link-list ul {
                grid-template-columns: 1fr;
            }
        }
        ::selection {
            background: #ffcc00;
            color: #000;
        }
        .pulse {
            animation: pulse 2s infinite;
        }
        @keyframes pulse {
            0% { transform: scale(1); }
            50% { transform: scale(1.05); }
            100% { transform: scale(1); }
        }