* { margin: 0; padding: 0; box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
            line-height: 1.6;
            color: #333;
            background: linear-gradient(135deg, #0c1a2d 0%, #1a3a5f 100%);
            color: #f0f0f0;
            min-height: 100vh;
        }
        a { color: #00a8ff; text-decoration: none; transition: color 0.3s ease; }
        a:hover { color: #7ed6df; text-decoration: underline; }
        img { max-width: 100%; height: auto; display: block; }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; }
        h1, h2, h3, h4 { font-weight: 700; line-height: 1.2; margin-bottom: 1rem; color: #fff; }
        h1 { font-size: clamp(2.5rem, 5vw, 3.5rem); margin-top: 1.5rem; }
        h2 { font-size: clamp(1.8rem, 4vw, 2.5rem); border-bottom: 2px solid #00a8ff; padding-bottom: 0.5rem; margin-top: 2.5rem; }
        h3 { font-size: clamp(1.4rem, 3vw, 1.8rem); margin-top: 2rem; color: #7ed6df; }
        h4 { font-size: 1.2rem; margin-top: 1.5rem; color: #bdc3c7; }
        p, li { margin-bottom: 1.2rem; font-size: 1.05rem; }
        strong { color: #f1c40f; }
        em { color: #95a5a6; }
        blockquote {
            border-left: 4px solid #00a8ff;
            padding-left: 1.5rem;
            margin: 2rem 0;
            font-style: italic;
            color: #bdc3c7;
        }
        ul, ol { padding-left: 2rem; margin-bottom: 1.5rem; }
        li { margin-bottom: 0.5rem; }
        .site-header {
            background: rgba(12, 26, 45, 0.95);
            backdrop-filter: blur(10px);
            position: sticky;
            top: 0;
            z-index: 1000;
            border-bottom: 1px solid #2c3e50;
            padding: 1rem 0;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-size: 2rem;
            font-weight: 900;
            background: linear-gradient(to right, #ff9a00, #ff2e00);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            text-decoration: none;
        }
        .my-logo:hover { text-decoration: none; }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .main-nav a {
            color: #ecf0f1;
            font-weight: 600;
            padding: 0.5rem;
        }
        .main-nav a:hover { color: #00a8ff; text-decoration: none; }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: #ecf0f1;
            font-size: 1.8rem;
            cursor: pointer;
        }
        .breadcrumb {
            padding: 1rem 0;
            color: #95a5a6;
            font-size: 0.9rem;
        }
        .breadcrumb a { color: #95a5a6; }
        .breadcrumb a:hover { color: #00a8ff; }
        .search-module {
            background: rgba(255,255,255,0.05);
            border-radius: 10px;
            padding: 2rem;
            margin: 2rem 0;
            text-align: center;
        }
        .search-form {
            display: flex;
            max-width: 600px;
            margin: 0 auto;
        }
        .search-input {
            flex-grow: 1;
            padding: 0.8rem 1rem;
            border: 2px solid #2c3e50;
            border-radius: 8px 0 0 8px;
            background: #1a3a5f;
            color: white;
            font-size: 1rem;
        }
        .search-btn {
            padding: 0.8rem 1.5rem;
            background: linear-gradient(to right, #00a8ff, #0097e6);
            color: white;
            border: none;
            border-radius: 0 8px 8px 0;
            cursor: pointer;
            font-weight: bold;
            transition: background 0.3s;
        }
        .search-btn:hover { background: linear-gradient(to right, #0097e6, #0078b3); }
        .main-content {
            background: rgba(255,255,255,0.03);
            border-radius: 15px;
            padding: 2rem;
            margin: 2rem 0;
            box-shadow: 0 10px 30px rgba(0,0,0,0.3);
        }
        .article-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            color: #95a5a6;
            font-size: 0.9rem;
            border-bottom: 1px solid #2c3e50;
            padding-bottom: 1rem;
            margin-bottom: 2rem;
        }
        .update-time::before { font-family: 'Font Awesome 5 Free'; font-weight: 900; content: '\f017'; margin-right: 0.5rem; }
        .featured-image {
            width: 100%;
            border-radius: 10px;
            margin: 2rem auto;
            border: 3px solid #00a8ff;
        }
        .content-section { margin-bottom: 3rem; }
        .highlight-box {
            background: linear-gradient(135deg, #1a3a5f, #2c3e50);
            border-left: 5px solid #f1c40f;
            padding: 1.5rem;
            border-radius: 0 10px 10px 0;
            margin: 2rem 0;
        }
        .link-list { display: flex; flex-wrap: wrap; gap: 1rem; list-style: none; padding: 0; }
        .link-list a {
            background: rgba(0,168,255,0.1);
            padding: 0.5rem 1rem;
            border-radius: 20px;
            border: 1px solid #00a8ff;
        }
        .link-list a:hover { background: rgba(0,168,255,0.2); text-decoration: none; }
        .user-interaction {
            background: rgba(255,255,255,0.05);
            border-radius: 10px;
            padding: 2rem;
            margin: 3rem 0;
        }
        .interaction-title { text-align: center; margin-bottom: 2rem; }
        .interaction-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
        }
        .interaction-form label { display: block; margin-bottom: 0.5rem; color: #bdc3c7; }
        .interaction-form input, .interaction-form textarea, .interaction-form select {
            width: 100%;
            padding: 0.8rem;
            margin-bottom: 1rem;
            background: #1a3a5f;
            border: 1px solid #2c3e50;
            border-radius: 5px;
            color: white;
        }
        .interaction-form textarea { min-height: 150px; resize: vertical; }
        .submit-btn {
            background: linear-gradient(to right, #00a8ff, #0097e6);
            color: white;
            padding: 0.8rem 2rem;
            border: none;
            border-radius: 5px;
            cursor: pointer;
            font-weight: bold;
            display: block;
            width: 100%;
            transition: background 0.3s;
        }
        .submit-btn:hover { background: linear-gradient(to right, #0097e6, #0078b3); }
        .star-rating { display: flex; justify-content: center; gap: 0.5rem; margin: 1rem 0; }
        .star-rating input { display: none; }
        .star-rating label { font-size: 2rem; color: #555; cursor: pointer; }
        .star-rating input:checked ~ label { color: #f1c40f; }
        .star-rating label:hover, .star-rating label:hover ~ label { color: #f39c12; }
        .site-footer {
            background: #0c1a2d;
            border-top: 1px solid #2c3e50;
            padding: 3rem 0 1.5rem;
            margin-top: 3rem;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-section h4 { color: #00a8ff; margin-bottom: 1rem; }
        friend-link {
            display: block;
            padding: 0.5rem 0;
            border-bottom: 1px dashed #2c3e50;
        }
        friend-link a { color: #bdc3c7; }
        .copyright {
            text-align: center;
            color: #95a5a6;
            font-size: 0.9rem;
            border-top: 1px solid #2c3e50;
            padding-top: 1.5rem;
        }
        @media (max-width: 768px) {
            .hamburger { display: block; }
            .main-nav ul {
                flex-direction: column;
                position: fixed;
                top: 70px;
                left: -100%;
                background: #0c1a2d;
                width: 100%;
                padding: 2rem;
                transition: left 0.3s ease;
                border-top: 1px solid #2c3e50;
            }
            .main-nav.active ul { left: 0; }
            .header-container { flex-wrap: wrap; }
            .search-form { flex-direction: column; }
            .search-input, .search-btn { border-radius: 8px; width: 100%; }
            .search-btn { margin-top: 0.5rem; }
            .interaction-grid { grid-template-columns: 1fr; }
        }