* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            color: #e0e0e0;
            background: linear-gradient(135deg, #0c1b2b 0%, #162b3d 50%, #1a3658 100%);
            background-attachment: fixed;
            min-height: 100vh;
            position: relative;
        }
        a {
            color: #4da6ff;
            text-decoration: none;
            transition: color 0.3s ease, text-shadow 0.3s ease;
        }
        a:hover {
            color: #80c1ff;
            text-shadow: 0 0 8px rgba(77, 166, 255, 0.7);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .text-center { text-align: center; }
        .bold { font-weight: 700; }
        .highlight {
            background: linear-gradient(90deg, rgba(255,215,0,0.2) 0%, rgba(255,215,0,0.05) 100%);
            padding: 2px 6px;
            border-radius: 3px;
        }
        .section-spacing {
            padding: 60px 0;
        }
        .content-wrapper {
            background: rgba(22, 33, 49, 0.85);
            backdrop-filter: blur(10px);
            border-radius: 15px;
            padding: 30px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
            border: 1px solid rgba(64, 128, 255, 0.1);
        }
        .main-header {
            background: rgba(12, 27, 43, 0.95);
            border-bottom: 2px solid rgba(77, 166, 255, 0.3);
            position: sticky;
            top: 0;
            z-index: 1000;
            backdrop-filter: blur(8px);
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 20px;
        }
        .my-logo {
            font-family: 'Palatino Linotype', 'Book Antiqua', serif;
            font-size: 2.2rem;
            font-weight: bold;
            background: linear-gradient(90deg, #ffd700, #ff9900, #4da6ff);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            text-shadow: 0 2px 4px rgba(0,0,0,0.5);
            letter-spacing: 1px;
        }
        .my-logo:hover {
            transform: scale(1.03);
        }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 25px;
        }
        .main-nav a {
            color: #b0d0ff;
            font-weight: 600;
            padding: 8px 12px;
            border-radius: 6px;
            position: relative;
        }
        .main-nav a:hover {
            background: rgba(77, 166, 255, 0.15);
        }
        .main-nav a::after {
            content: '';
            position: absolute;
            bottom: -5px;
            left: 12px;
            right: 12px;
            height: 2px;
            background: #4da6ff;
            transform: scaleX(0);
            transition: transform 0.3s ease;
        }
        .main-nav a:hover::after {
            transform: scaleX(1);
        }
        .hamburger {
            display: none;
            flex-direction: column;
            cursor: pointer;
            gap: 5px;
        }
        .hamburger span {
            width: 25px;
            height: 3px;
            background: #4da6ff;
            border-radius: 2px;
            transition: 0.3s;
        }
        #nav-toggle {
            display: none;
        }
        .breadcrumb {
            padding: 15px 20px;
            background: rgba(20, 35, 55, 0.8);
            font-size: 0.9rem;
        }
        .breadcrumb ul {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
        }
        .breadcrumb li:not(:last-child)::after {
            content: '›';
            margin: 0 10px;
            color: #80c1ff;
        }
        .main-content {
            padding: 30px 20px;
        }
        .article-header {
            margin-bottom: 40px;
            text-align: center;
        }
        .article-header h1 {
            font-size: 3.2rem;
            color: #ffd700;
            margin-bottom: 15px;
            text-shadow: 0 2px 10px rgba(255, 215, 0, 0.4);
        }
        .article-header .subtitle {
            font-size: 1.3rem;
            color: #b0d0ff;
            max-width: 800px;
            margin: 0 auto;
        }
        h1, h2, h3, h4 {
            color: #ffd700;
            margin-top: 2rem;
            margin-bottom: 1rem;
            line-height: 1.3;
        }
        h1 { font-size: 3.2rem; }
        h2 {
            font-size: 2.4rem;
            border-bottom: 2px solid rgba(255, 215, 0, 0.3);
            padding-bottom: 10px;
        }
        h3 { font-size: 1.8rem; color: #80c1ff; }
        h4 { font-size: 1.5rem; color: #a3d5ff; }
        p {
            margin-bottom: 1.2em;
            font-size: 1.1rem;
        }
        .lead {
            font-size: 1.3rem;
            color: #c0d9ff;
            font-weight: 300;
        }
        .feature-box {
            background: rgba(30, 50, 80, 0.4);
            border-left: 5px solid #4da6ff;
            padding: 20px;
            margin: 25px 0;
            border-radius: 0 10px 10px 0;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        .feature-box:hover {
            transform: translateX(5px);
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
        }
        .form-group {
            margin-bottom: 20px;
        }
        .form-label {
            display: block;
            margin-bottom: 8px;
            color: #ffd700;
            font-weight: 600;
        }
        .form-input, .form-textarea, .form-select {
            width: 100%;
            padding: 12px 15px;
            background: rgba(20, 35, 55, 0.8);
            border: 1px solid #4da6ff;
            border-radius: 8px;
            color: #e0e0e0;
            font-size: 1rem;
            transition: border-color 0.3s, box-shadow 0.3s;
        }
        .form-input:focus, .form-textarea:focus, .form-select:focus {
            outline: none;
            border-color: #ffd700;
            box-shadow: 0 0 0 3px rgba(255, 215, 0, 0.2);
        }
        .form-textarea {
            min-height: 120px;
            resize: vertical;
        }
        .btn {
            display: inline-block;
            padding: 12px 30px;
            background: linear-gradient(90deg, #4da6ff, #0066cc);
            color: white;
            border: none;
            border-radius: 8px;
            font-weight: bold;
            font-size: 1rem;
            cursor: pointer;
            transition: all 0.3s ease;
            box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
        }
        .btn:hover {
            background: linear-gradient(90deg, #66b3ff, #0073e6);
            transform: translateY(-3px);
            box-shadow: 0 6px 12px rgba(0, 0, 0, 0.4);
        }
        .btn:active {
            transform: translateY(0);
        }
        .stars {
            display: flex;
            gap: 10px;
            margin: 10px 0;
        }
        .star {
            font-size: 2rem;
            color: #555;
            cursor: pointer;
            transition: color 0.2s;
        }
        .star:hover,
        .star.active {
            color: #ffd700;
        }
        .article-image {
            margin: 30px auto;
            max-width: 800px;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.5);
            border: 2px solid rgba(255, 215, 0, 0.3);
        }
        .article-image img {
            width: 100%;
            transition: transform 0.5s ease;
        }
        .article-image:hover img {
            transform: scale(1.03);
        }
        .image-caption {
            text-align: center;
            font-style: italic;
            color: #aaa;
            padding: 10px;
            background: rgba(0, 0, 0, 0.3);
        }
        .main-footer {
            background: rgba(12, 27, 43, 0.95);
            border-top: 2px solid rgba(77, 166, 255, 0.3);
            margin-top: 60px;
            padding: 40px 20px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 30px;
            margin-bottom: 30px;
        }
        .footer-section h4 {
            color: #ffd700;
            margin-bottom: 20px;
            font-size: 1.3rem;
        }
        .friend-links {
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
            list-style: none;
        }
        .friend-links a {
            background: rgba(30, 50, 80, 0.5);
            padding: 8px 15px;
            border-radius: 20px;
            border: 1px solid #4da6ff;
        }
        .friend-links a:hover {
            background: rgba(77, 166, 255, 0.2);
        }
        .copyright {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid rgba(255,255,255,0.1);
            color: #aaa;
            font-size: 0.9rem;
        }
        .update-time {
            color: #ff9900;
            font-weight: bold;
        }
        @media (max-width: 992px) {
            h1 { font-size: 2.8rem; }
            h2 { font-size: 2.1rem; }
            .header-container {
                flex-wrap: wrap;
            }
        }
        @media (max-width: 768px) {
            .hamburger {
                display: flex;
            }
            .main-nav ul {
                display: none;
                flex-direction: column;
                width: 100%;
                background: rgba(12, 27, 43, 0.98);
                position: absolute;
                top: 100%;
                left: 0;
                padding: 20px;
                box-shadow: 0 10px 20px rgba(0,0,0,0.5);
                border-top: 1px solid rgba(77, 166, 255, 0.3);
            }
            #nav-toggle:checked ~ .main-nav ul {
                display: flex;
            }
            .main-nav a {
                display: block;
                padding: 12px 15px;
                border-radius: 8px;
                margin-bottom: 5px;
            }
            .header-container {
                padding: 15px;
            }
            .article-header h1 {
                font-size: 2.4rem;
            }
            .content-wrapper {
                padding: 20px;
            }
            .section-spacing {
                padding: 40px 0;
            }
        }
        @media (max-width: 480px) {
            .article-header h1 {
                font-size: 2rem;
            }
            h2 { font-size: 1.8rem; }
            .btn {
                padding: 10px 20px;
                width: 100%;
            }
            .breadcrumb li {
                font-size: 0.85rem;
            }
        }