* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            background-color: #f8f9fa;
            color: #333;
            line-height: 1.7;
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }
        a {
            text-decoration: none;
            color: #2a6ebb;
            transition: color 0.3s ease, transform 0.2s ease;
        }
        a:hover {
            color: #e63946;
            transform: translateY(-1px);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 8px;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .visually-hidden {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            white-space: nowrap;
            border: 0;
        }
        header {
            background: linear-gradient(135deg, #1e3c72 0%, #2a5298 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: 15px 0;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 900;
            background: linear-gradient(to right, #ff9a00, #ffd166);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            letter-spacing: 1px;
            text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
        }
        .my-logo:hover {
            opacity: 0.9;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
        }
        nav {
            display: flex;
            gap: 30px;
        }
        nav a {
            color: #e0e0e0;
            font-weight: 600;
            padding: 8px 12px;
            border-radius: 4px;
        }
        nav a:hover {
            background-color: rgba(255, 255, 255, 0.15);
            color: white;
        }
        .breadcrumb {
            background-color: rgba(255, 255, 255, 0.05);
            padding: 12px 0;
            font-size: 0.9rem;
        }
        .breadcrumb a {
            color: #b3d4fc;
        }
        .breadcrumb span {
            color: #ccc;
            margin: 0 8px;
        }
        .search-container {
            background-color: #e9f5ff;
            padding: 30px 0;
            border-bottom: 1px solid #d1e7ff;
        }
        .search-form {
            max-width: 600px;
            margin: 0 auto;
            display: flex;
            gap: 10px;
        }
        .search-form input {
            flex: 1;
            padding: 15px 20px;
            border: 2px solid #2a6ebb;
            border-radius: 50px;
            font-size: 1rem;
            outline: none;
            transition: border-color 0.3s;
        }
        .search-form input:focus {
            border-color: #e63946;
        }
        .search-form button {
            background: linear-gradient(to right, #2a6ebb, #1e3c72);
            color: white;
            border: none;
            padding: 15px 30px;
            border-radius: 50px;
            font-weight: 700;
            cursor: pointer;
            transition: background 0.3s, transform 0.2s;
        }
        .search-form button:hover {
            background: linear-gradient(to right, #e63946, #c1121f);
            transform: scale(1.05);
        }
        main {
            flex: 1;
            padding: 40px 0;
        }
        article {
            background-color: white;
            border-radius: 12px;
            padding: 40px;
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.07);
            margin-bottom: 40px;
        }
        h1 {
            font-size: 2.8rem;
            color: #1e3c72;
            margin-bottom: 25px;
            line-height: 1.2;
            text-align: center;
            border-bottom: 3px solid #ff9a00;
            padding-bottom: 20px;
        }
        .meta-info {
            text-align: center;
            color: #666;
            margin-bottom: 40px;
            font-style: italic;
            font-size: 0.95rem;
        }
        h2 {
            font-size: 2.1rem;
            color: #2a5298;
            margin: 50px 0 25px;
            padding-bottom: 10px;
            border-bottom: 2px dashed #ffd166;
        }
        h3 {
            font-size: 1.6rem;
            color: #1a508b;
            margin: 35px 0 15px;
        }
        h4 {
            font-size: 1.3rem;
            color: #0066cc;
            margin: 25px 0 12px;
        }
        p {
            margin-bottom: 22px;
            text-align: justify;
            font-size: 1.1rem;
        }
        .intro {
            font-size: 1.3rem;
            color: #444;
            background-color: #f1f8ff;
            padding: 25px;
            border-left: 5px solid #2a6ebb;
            border-radius: 0 8px 8px 0;
            margin-bottom: 35px;
        }
        .highlight {
            background-color: #fff9db;
            padding: 4px 8px;
            border-radius: 3px;
            font-weight: 700;
            color: #b35900;
        }
        .important {
            font-weight: 700;
            color: #c1121f;
        }
        .skill-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
            margin: 40px 0;
        }
        .skill-card {
            background: linear-gradient(to bottom right, #ffffff, #f0f8ff);
            border: 1px solid #d1e7ff;
            border-radius: 10px;
            padding: 25px;
            transition: transform 0.3s, box-shadow 0.3s;
        }
        .skill-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 12px 25px rgba(42, 82, 152, 0.15);
        }
        .skill-card h4 {
            color: #1e3c72;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .skill-card i {
            color: #ff9a00;
        }
        .feature-image {
            margin: 40px auto;
            max-width: 800px;
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
            border: 5px solid white;
        }
        blockquote {
            background: linear-gradient(to right, #e9f5ff, transparent);
            border-left: 6px solid #ff9a00;
            padding: 25px 30px;
            margin: 35px 0;
            font-style: italic;
            color: #2a5298;
            border-radius: 0 10px 10px 0;
        }
        .link-list {
            background-color: #f8f9fa;
            padding: 25px;
            border-radius: 10px;
            margin: 35px 0;
        }
        .link-list ul {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
            justify-content: center;
        }
        .link-list li a {
            background-color: white;
            padding: 12px 25px;
            border-radius: 50px;
            border: 1px solid #2a6ebb;
            display: inline-block;
            font-weight: 600;
        }
        .link-list li a:hover {
            background-color: #2a6ebb;
            color: white;
        }
        .stats-box {
            display: flex;
            justify-content: space-around;
            flex-wrap: wrap;
            background: linear-gradient(135deg, #1e3c72, #2a5298);
            color: white;
            padding: 30px;
            border-radius: 12px;
            margin: 45px 0;
            text-align: center;
        }
        .stat {
            padding: 15px;
        }
        .stat-number {
            font-size: 3rem;
            font-weight: 900;
            color: #ffd166;
            display: block;
        }
        .stat-label {
            font-size: 1.1rem;
            opacity: 0.9;
        }
        .user-interaction {
            background-color: #f1f8ff;
            border-radius: 12px;
            padding: 40px;
            margin-top: 50px;
            border-top: 5px solid #ff9a00;
        }
        .interaction-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
            margin-top: 30px;
        }
        .interaction-form {
            background-color: white;
            padding: 30px;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
        }
        .interaction-form h3 {
            margin-top: 0;
            display: flex;
            align-items: center;
            gap: 10px;
            color: #1e3c72;
        }
        .form-group {
            margin-bottom: 20px;
        }
        label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
            color: #555;
        }
        input, textarea, select {
            width: 100%;
            padding: 14px;
            border: 1px solid #ccc;
            border-radius: 6px;
            font-size: 1rem;
            transition: border 0.3s;
        }
        input:focus, textarea:focus, select:focus {
            border-color: #2a6ebb;
            outline: none;
        }
        .rating {
            display: flex;
            flex-direction: row-reverse;
            justify-content: flex-end;
            gap: 5px;
        }
        .rating input {
            display: none;
        }
        .rating label {
            font-size: 2rem;
            color: #ddd;
            cursor: pointer;
            margin: 0;
            padding: 0;
        }
        .rating label:hover,
        .rating label:hover ~ label,
        .rating input:checked ~ label {
            color: #ff9a00;
        }
        .submit-btn {
            background: linear-gradient(to right, #2a6ebb, #1e3c72);
            color: white;
            border: none;
            padding: 15px 30px;
            border-radius: 50px;
            font-weight: 700;
            font-size: 1.1rem;
            cursor: pointer;
            transition: background 0.3s, transform 0.2s;
            display: block;
            width: 100%;
        }
        .submit-btn:hover {
            background: linear-gradient(to right, #e63946, #c1121f);
            transform: translateY(-2px);
        }
        footer {
            background-color: #1e3c72;
            color: #e0e0e0;
            padding: 50px 0 20px;
            margin-top: 60px;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-section h3 {
            color: #ffd166;
            margin-bottom: 25px;
            font-size: 1.4rem;
        }
        friend-link {
            display: block;
            background-color: rgba(255, 255, 255, 0.05);
            padding: 12px 20px;
            margin-bottom: 12px;
            border-radius: 6px;
            border-left: 4px solid #ff9a00;
            transition: background-color 0.3s;
        }
        friend-link:hover {
            background-color: rgba(255, 255, 255, 0.1);
        }
        friend-link a {
            color: #b3d4fc;
            font-weight: 600;
        }
        .copyright {
            text-align: center;
            padding-top: 25px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            font-size: 0.9rem;
            color: #aaa;
        }
        @media (max-width: 992px) {
            h1 { font-size: 2.4rem; }
            h2 { font-size: 1.9rem; }
            .skill-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 768px) {
            .hamburger { display: block; }
            nav {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background-color: #1e3c72;
                padding: 20px;
                box-shadow: 0 5px 15px rgba(0,0,0,0.2);
            }
            nav.active { display: flex; }
            .header-top { padding: 12px 0; }
            .search-form { flex-direction: column; }
            .search-form button { width: 100%; }
            article { padding: 25px; }
            .skill-grid, .interaction-grid { grid-template-columns: 1fr; }
            .link-list ul { flex-direction: column; align-items: center; }
            .link-list li { width: 100%; text-align: center; }
            .stats-box { flex-direction: column; gap: 20px; }
        }
        @media (max-width: 480px) {
            h1 { font-size: 2rem; }
            h2 { font-size: 1.6rem; }
            .intro { font-size: 1.1rem; padding: 20px; }
            .footer-content { grid-template-columns: 1fr; }
        }