* { 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: #e0e0e0;
            background: linear-gradient(135deg, #0a192f 0%, #1a365d 100%);
            min-height: 100vh;
            background-attachment: fixed;
        }
        a { color: #4dabf7; text-decoration: none; transition: color 0.3s ease, transform 0.2s ease; }
        a:hover { color: #74c0fc; transform: translateY(-2px); }
        img { max-width: 100%; height: auto; display: block; }
        .container {
            width: 100%;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: rgba(10, 25, 47, 0.95);
            backdrop-filter: blur(10px);
            border-bottom: 2px solid #1e4976;
            position: sticky;
            top: 0;
            z-index: 1000;
            padding: 15px 0;
        }
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-family: 'Impact', 'Arial Black', sans-serif;
            font-size: 2.2rem;
            background: linear-gradient(90deg, #ff6b6b, #4ecdc4, #45b7d1);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            text-shadow: 0 2px 5px rgba(0, 0, 0, 0.5);
        }
        .my-logo:hover { transform: scale(1.05); }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 30px;
        }
        .main-nav a {
            color: #a5d8ff;
            font-weight: 600;
            padding: 8px 12px;
            border-radius: 5px;
        }
        .main-nav a:hover {
            background: rgba(30, 73, 118, 0.5);
            color: #fff;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: #a5d8ff;
            font-size: 1.8rem;
            cursor: pointer;
        }
        .breadcrumb {
            padding: 15px 0;
            font-size: 0.9rem;
            color: #8a9ba8;
        }
        .breadcrumb a { color: #8a9ba8; }
        .breadcrumb a:hover { color: #4dabf7; }
        main { padding: 30px 0 60px; }
        article {
            background: rgba(22, 42, 68, 0.8);
            border-radius: 15px;
            padding: 40px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
            border: 1px solid #2a4a6e;
        }
        h1 {
            font-size: 3.2rem;
            color: #ffffff;
            margin-bottom: 1.5rem;
            border-bottom: 3px solid #4ecdc4;
            padding-bottom: 15px;
            text-shadow: 0 2px 4px rgba(0,0,0,0.7);
        }
        h2 {
            font-size: 2.3rem;
            color: #4ecdc4;
            margin: 2.5rem 0 1.2rem;
            padding-top: 10px;
        }
        h3 {
            font-size: 1.8rem;
            color: #74c0fc;
            margin: 2rem 0 1rem;
        }
        h4 {
            font-size: 1.4rem;
            color: #a5d8ff;
            margin: 1.5rem 0 0.8rem;
        }
        p {
            margin-bottom: 1.5rem;
            font-size: 1.1rem;
            text-align: justify;
        }
        .highlight {
            background: rgba(78, 205, 196, 0.15);
            border-left: 4px solid #4ecdc4;
            padding: 20px;
            margin: 25px 0;
            border-radius: 0 8px 8px 0;
        }
        .featured-img {
            width: 80%;
            margin: 30px auto;
            border-radius: 10px;
            overflow: hidden;
            border: 3px solid #1e4976;
            box-shadow: 0 8px 20px rgba(0,0,0,0.6);
        }
        .featured-img img { width: 100%; transition: transform 0.5s ease; }
        .featured-img:hover img { transform: scale(1.03); }
        .interactive-module {
            background: rgba(30, 41, 59, 0.9);
            border-radius: 10px;
            padding: 25px;
            margin: 40px 0;
            border: 1px solid #3b82f6;
        }
        .module-title {
            display: flex;
            align-items: center;
            gap: 10px;
            color: #3b82f6;
            margin-bottom: 20px;
            font-size: 1.5rem;
        }
        form {
            display: grid;
            gap: 20px;
        }
        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
            color: #cbd5e1;
        }
        input, textarea, select {
            width: 100%;
            padding: 12px 15px;
            border-radius: 8px;
            border: 1px solid #475569;
            background: #1e293b;
            color: #f1f5f9;
            font-size: 1rem;
            transition: border 0.3s;
        }
        input:focus, textarea:focus, select:focus {
            outline: none;
            border-color: #3b82f6;
            box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.3);
        }
        button {
            background: linear-gradient(90deg, #3b82f6, #1d4ed8);
            color: white;
            border: none;
            padding: 14px 28px;
            border-radius: 8px;
            font-weight: bold;
            font-size: 1.1rem;
            cursor: pointer;
            transition: all 0.3s ease;
            justify-self: start;
        }
        button:hover {
            background: linear-gradient(90deg, #1d4ed8, #1e40af);
            box-shadow: 0 6px 15px rgba(29, 78, 216, 0.4);
        }
        .star-rating {
            display: flex;
            gap: 10px;
            font-size: 1.8rem;
            color: #fbbf24;
            cursor: pointer;
        }
        .star-rating i { transition: transform 0.2s; }
        .star-rating i:hover { transform: scale(1.3); }
        .related-links {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 20px;
            margin: 40px 0;
        }
        .link-card {
            background: rgba(30, 41, 59, 0.7);
            border-radius: 10px;
            padding: 20px;
            border-top: 4px solid #10b981;
            transition: transform 0.3s, box-shadow 0.3s;
        }
        .link-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 12px 20px rgba(0,0,0,0.4);
        }
        .site-footer {
            background: rgba(10, 25, 47, 0.98);
            border-top: 2px solid #1e4976;
            padding: 40px 0 20px;
            margin-top: 50px;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 30px;
        }
        .footer-section h4 {
            color: #4ecdc4;
            margin-bottom: 20px;
            font-size: 1.3rem;
        }
        friend-link {
            display: block;
            padding: 8px 0;
            color: #a5d8ff;
            border-bottom: 1px dashed #2a4a6e;
        }
        friend-link:last-child { border-bottom: none; }
        .copyright {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid #2a4a6e;
            color: #8a9ba8;
            font-size: 0.9rem;
        }
        .update-time {
            color: #fbbf24;
            font-weight: bold;
            margin-top: 20px;
            font-size: 0.9rem;
        }
        @media (max-width: 992px) {
            .main-nav ul { gap: 15px; }
            h1 { font-size: 2.7rem; }
            h2 { font-size: 2rem; }
        }
        @media (max-width: 768px) {
            .hamburger { display: block; }
            .main-nav ul {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background: rgba(10, 25, 47, 0.98);
                padding: 20px;
                border-top: 1px solid #1e4976;
                box-shadow: 0 10px 20px rgba(0,0,0,0.3);
            }
            .main-nav.active ul { display: flex; }
            .featured-img { width: 100%; }
            article { padding: 25px; }
        }
        @media (max-width: 480px) {
            .container { padding: 0 15px; }
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.8rem; }
            .my-logo { font-size: 1.8rem; }
        }