* {
            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: #f0f0f0;
            background: #0a0a16;
            background: linear-gradient(135deg, #0a0a16 0%, #1a1a2e 100%);
            min-height: 100vh;
            overflow-x: hidden;
        }
        a {
            color: #4fc3f7;
            text-decoration: none;
            transition: color 0.3s ease, text-shadow 0.3s ease;
        }
        a:hover {
            color: #29b6f6;
            text-shadow: 0 0 8px rgba(41, 182, 246, 0.5);
        }
        img {
            max-width: 100%;
            height: auto;
            border-radius: 8px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.7);
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .text-center { text-align: center; }
        .bold { font-weight: 800; }
        .highlight {
            background: linear-gradient(90deg, #ff6f00, #ffca28);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            font-weight: 700;
        }
        header {
            background: rgba(10, 10, 22, 0.95);
            backdrop-filter: blur(10px);
            border-bottom: 2px solid #1e88e5;
            position: sticky;
            top: 0;
            z-index: 1000;
            padding: 15px 0;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo a {
            font-family: 'Arial Black', sans-serif;
            font-size: 2.2rem;
            background: linear-gradient(45deg, #4fc3f7, #29b6f6, #1e88e5);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            text-decoration: none;
            letter-spacing: 1px;
        }
        .my-logo a:hover {
            filter: brightness(1.2);
        }
        nav {
            display: flex;
            align-items: center;
        }
        .nav-links {
            display: flex;
            list-style: none;
            gap: 30px;
        }
        .nav-links li a {
            font-size: 1.1rem;
            font-weight: 600;
            padding: 8px 12px;
            border-radius: 5px;
        }
        .nav-links li a:hover {
            background: rgba(30, 136, 229, 0.2);
        }
        .hamburger {
            display: none;
            cursor: pointer;
            font-size: 1.8rem;
            color: #4fc3f7;
            background: none;
            border: none;
        }
        .breadcrumb {
            padding: 15px 0;
            background: rgba(26, 26, 46, 0.8);
            margin-bottom: 30px;
            border-bottom: 1px solid #333;
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
            gap: 10px;
        }
        .breadcrumb li:not(:last-child)::after {
            content: "›";
            margin-left: 10px;
            color: #888;
        }
        main {
            padding: 30px 0 60px;
        }
        article {
            background: rgba(20, 20, 40, 0.8);
            border-radius: 15px;
            padding: 40px;
            box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
            margin-bottom: 40px;
            border: 1px solid #2a2a4a;
        }
        h1 {
            font-size: 3.2rem;
            margin-bottom: 25px;
            color: #ffffff;
            text-shadow: 0 0 15px #1e88e5;
            line-height: 1.2;
            border-bottom: 3px solid #1e88e5;
            padding-bottom: 15px;
        }
        h2 {
            font-size: 2.4rem;
            margin: 40px 0 20px;
            color: #4fc3f7;
            padding-left: 10px;
            border-left: 5px solid #ff6f00;
        }
        h3 {
            font-size: 1.8rem;
            margin: 30px 0 15px;
            color: #ffca28;
        }
        h4 {
            font-size: 1.4rem;
            margin: 25px 0 12px;
            color: #a5d6a7;
        }
        p {
            margin-bottom: 1.8em;
            font-size: 1.15rem;
            text-align: justify;
        }
        .intro {
            font-size: 1.3rem;
            background: rgba(30, 136, 229, 0.1);
            padding: 25px;
            border-radius: 10px;
            border-left: 5px solid #ff6f00;
            margin-bottom: 35px;
        }
        .img-container {
            margin: 40px auto;
            text-align: center;
            max-width: 900px;
        }
        .img-container img {
            border: 3px solid #1e88e5;
        }
        .img-caption {
            font-style: italic;
            margin-top: 10px;
            color: #aaa;
            font-size: 0.95rem;
        }
        .interactive-section {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
            margin: 50px 0;
        }
        .form-box {
            background: rgba(30, 30, 60, 0.9);
            padding: 25px;
            border-radius: 12px;
            border: 1px solid #444;
        }
        .form-box h3 {
            margin-top: 0;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .form-box h3 i {
            color: #ffca28;
        }
        .form-group {
            margin-bottom: 20px;
        }
        label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
            color: #ccc;
        }
        input, textarea, select {
            width: 100%;
            padding: 12px 15px;
            border-radius: 8px;
            border: 1px solid #555;
            background: rgba(10, 10, 22, 0.7);
            color: #fff;
            font-size: 1rem;
            transition: border 0.3s, box-shadow 0.3s;
        }
        input:focus, textarea:focus, select:focus {
            outline: none;
            border-color: #4fc3f7;
            box-shadow: 0 0 10px rgba(79, 195, 247, 0.5);
        }
        button {
            background: linear-gradient(45deg, #1e88e5, #0d47a1);
            color: white;
            border: none;
            padding: 14px 28px;
            border-radius: 8px;
            font-size: 1.1rem;
            font-weight: 700;
            cursor: pointer;
            transition: all 0.3s ease;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
        }
        button:hover {
            background: linear-gradient(45deg, #0d47a1, #1e88e5);
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.3);
        }
        .stars {
            display: flex;
            gap: 10px;
            justify-content: center;
            margin: 20px 0;
        }
        .stars input {
            display: none;
        }
        .stars label {
            font-size: 2rem;
            color: #555;
            cursor: pointer;
            transition: color 0.2s;
        }
        .stars input:checked ~ label,
        .stars label:hover,
        .stars label:hover ~ label {
            color: #ffca28;
        }
        .related-links {
            background: rgba(40, 40, 80, 0.6);
            padding: 25px;
            border-radius: 12px;
            margin: 40px 0;
        }
        .related-links h3 {
            margin-top: 0;
        }
        .related-links ul {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 15px;
            list-style: none;
        }
        .related-links li a {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px;
            background: rgba(30, 30, 60, 0.7);
            border-radius: 8px;
            border: 1px solid transparent;
            transition: all 0.3s;
        }
        .related-links li a:hover {
            border-color: #4fc3f7;
            background: rgba(79, 195, 247, 0.1);
            transform: translateX(5px);
        }
        .related-links i {
            color: #ff6f00;
        }
        footer {
            background: #0a0a16;
            border-top: 2px solid #1e88e5;
            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 h4 {
            color: #4fc3f7;
            margin-bottom: 20px;
            font-size: 1.4rem;
        }
        .footer-section ul {
            list-style: none;
        }
        .footer-section ul li {
            margin-bottom: 12px;
        }
        friend-link {
            display: block;
            padding: 10px;
            background: rgba(255, 255, 255, 0.05);
            border-radius: 6px;
            margin-bottom: 10px;
            transition: background 0.3s;
        }
        friend-link:hover {
            background: rgba(79, 195, 247, 0.2);
        }
        .copyright {
            text-align: center;
            padding-top: 30px;
            border-top: 1px solid #333;
            color: #888;
            font-size: 0.95rem;
        }
        .update-time {
            color: #ffca28;
            font-weight: 700;
            margin-top: 10px;
            display: inline-block;
            padding: 5px 15px;
            background: rgba(255, 202, 40, 0.1);
            border-radius: 20px;
        }
        @media (max-width: 992px) {
            h1 { font-size: 2.8rem; }
            h2 { font-size: 2.1rem; }
            .nav-links { gap: 20px; }
        }
        @media (max-width: 768px) {
            .header-container { flex-direction: column; gap: 20px; }
            .nav-links {
                display: none;
                flex-direction: column;
                width: 100%;
                text-align: center;
                background: rgba(10, 10, 22, 0.98);
                position: absolute;
                top: 100%;
                left: 0;
                padding: 20px;
                border-top: 1px solid #333;
            }
            .nav-links.active { display: flex; }
            .hamburger { display: block; }
            .interactive-section { grid-template-columns: 1fr; }
            article { padding: 25px; }
        }
        @media (max-width: 480px) {
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.8rem; }
            .my-logo a { font-size: 1.8rem; }
            .form-box { padding: 20px; }
        }