:root {
            --primary-color: #00f7ff;
            --secondary-color: #00a2ff;
            --accent-color: #ff00ea;
            --dark-bg: #0a0e17;
            --card-bg: rgba(16, 23, 41, 0.8);
            --text-color: #e0e0e0;
            --border-glow: 0 0 10px rgba(0, 247, 255, 0.7);
        }
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        
        body {
             margin: 0 auto;
            max-width: 700px;
            background-color: var(--dark-bg);
            color: var(--text-color);
            min-height: 100vh;
            position: relative;
            overflow-x: hidden;
        }
        
        /* 星座背景 */
        .constellation_background {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            z-index: -1;
            overflow: hidden;
        }
        
        .star {
            position: absolute;
            background-color: white;
            border-radius: 50%;
            animation: twinkle 5s infinite;
        }
        
        .star::before {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 100%;
            height: 100%;
            background: radial-gradient(circle, rgba(255,255,255,0.8) 0%, transparent 70%);
            border-radius: 50%;
        }
        
        .constellation_line {
            position: absolute;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(0, 247, 255, 0.5), transparent);
            transform-origin: 0 0;
        }
        
        @keyframes twinkle {
            0%, 100% { opacity: 0.3; }
            50% { opacity: 1; }
        }
        
        @keyframes moveStars {
            0% { transform: translateY(0); }
            100% { transform: translateY(-100vh); }
        }
        
        .main_container {
            max-width: 1000px;
            margin: 0 auto;
            padding: 20px;
        }
        
        .header_section {
            text-align: center;
            margin-bottom: 30px;
            padding: 20px 0;
        }
        
        .logo_element {
            max-width: 120px;
            height: auto;
            margin-bottom: 20px;
            filter: drop-shadow(0 0 10px var(--primary-color));
        }
        
        .title_heading {
            font-size: 2.5rem;
            margin-bottom: 15px;
            background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            text-shadow: 0 0 15px rgba(0, 247, 255, 0.5);
        }
        
        .subtitle_text {
            font-size: 1.2rem;
            color: var(--text-color);
            opacity: 0.8;
        }
        
        .card_component {
            background: var(--card-bg);
            border-radius: 15px;
            padding: 30px;
            margin-bottom: 30px;
            box-shadow: 0 0 20px rgba(0, 0, 0, 0.5);
            border: 1px solid rgba(0, 247, 255, 0.3);
            backdrop-filter: blur(10px);
            position: relative;
            overflow: hidden;
        }
        
        .card_component::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background: linear-gradient(90deg, var(--primary-color), var(--secondary-color), var(--accent-color));
        }
        
        .progress_indicator {
            height: 8px;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 4px;
            margin-bottom: 15px;
            overflow: hidden;
        }
        
        .progress_bar {
            height: 100%;
            width: 0%;
            background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
            border-radius: 4px;
            transition: width 0.5s ease;
            box-shadow: 0 0 10px var(--primary-color);
        }
        
        .progress_text {
            text-align: center;
            margin-bottom: 30px;
            font-size: 1rem;
            color: var(--primary-color);
        }
        
        .question_container {
            margin-bottom: 30px;
        }
        
        .question_title {
            font-size: 1.4rem;
            margin-bottom: 20px;
            color: var(--primary-color);
        }
        
        .options_list {
            list-style: none;
        }
        
        .option_item {
            margin-bottom: 15px;
            padding: 15px;
            border: 1px solid rgba(0, 247, 255, 0.2);
            border-radius: 10px;
            transition: all 0.3s ease;
            cursor: pointer;
        }
        
        .option_item:hover {
            border-color: var(--primary-color);
            box-shadow: var(--border-glow);
            background: rgba(0, 247, 255, 0.05);
        }
        
        .option_item.selected {
            border-color: var(--primary-color);
            box-shadow: var(--border-glow);
            background: rgba(0, 247, 255, 0.1);
        }
        
        .option_item label {
            display: flex;
            align-items: center;
            cursor: pointer;
            font-size: 1.1rem;
        }
        
        .radio_input {
            margin-right: 15px;
            appearance: none;
            width: 20px;
            height: 20px;
            border: 2px solid var(--primary-color);
            border-radius: 50%;
            position: relative;
            cursor: pointer;
        }
        
        .radio_input:checked::before {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 10px;
            height: 10px;
            background: var(--primary-color);
            border-radius: 50%;
            box-shadow: 0 0 10px var(--primary-color);
        }
        
        .completion_section {
            text-align: center;
            padding: 20px 0;
        }
        
        .completion_title {
            font-size: 2rem;
            margin-bottom: 20px;
            color: var(--primary-color);
        }
        
        .completion_text {
            font-size: 1.1rem;
            margin-bottom: 30px;
            line-height: 1.6;
        }
        
        .action_button {
            background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
            color: #000;
            border: none;
            padding: 15px 40px;
            font-size: 1.2rem;
            border-radius: 50px;
            cursor: pointer;
            transition: all 0.3s ease;
            font-weight: bold;
            box-shadow: 0 0 15px rgba(0, 247, 255, 0.5);
        }
        
        .action_button:hover {
            transform: translateY(-3px);
            box-shadow: 0 0 20px rgba(0, 247, 255, 0.8);
        }
        
        .image_element {
            border-radius: 10px;
            margin-bottom: 30px;
            box-shadow: 0 0 20px rgba(0, 0, 0, 0.5);
        }
        
        .warning_title {
            font-size: 1.3rem;
            margin-bottom: 15px;
            color: #ff5555;
        }
        
        .warning_text {
            font-size: 0.9rem;
            line-height: 1.6;
            opacity: 0.8;
        }
        
        .warning_text p {
            margin-bottom: 10px;
        }
        
        .navigation_buttons {
            display: flex;
            justify-content: space-between;
            margin-top: 30px;
        }
        
        .nav_button {
            background: transparent;
            color: var(--primary-color);
            border: 1px solid var(--primary-color);
            padding: 10px 25px;
            border-radius: 50px;
            cursor: pointer;
            transition: all 0.3s ease;
        }
        
        .nav_button:hover {
            background: rgba(0, 247, 255, 0.1);
            box-shadow: var(--border-glow);
        }
        
        .nav_button:disabled {
            opacity: 0.5;
            cursor: not-allowed;
        }
        
        .nav_button:disabled:hover {
            background: transparent;
            box-shadow: none;
        }
        
        .legal_links {
            display: flex;
            justify-content: center;
            gap: 30px;
            margin-top: 30px;
            flex-wrap: wrap;
        }
        
        .legal_link {
            color: var(--primary-color);
            text-decoration: none;
            font-size: 0.9rem;
            padding: 10px 15px;
            border-radius: 5px;
            transition: all 0.3s ease;
        }
        
        .legal_link:hover {
            background: rgba(0, 247, 255, 0.1);
            box-shadow: var(--border-glow);
        }
        
        .modal_overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.8);
            z-index: 1000;
            align-items: center;
            justify-content: center;
        }
        
        .modal_content {
            background: var(--card-bg);
            border-radius: 15px;
            padding: 30px;
            max-width: 700px;
            width: 90%;
            max-height: 80vh;
            overflow-y: auto;
            box-shadow: 0 0 30px rgba(0, 247, 255, 0.3);
            border: 1px solid rgba(0, 247, 255, 0.5);
        }
        
        .modal_header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 20px;
            border-bottom: 1px solid rgba(0, 247, 255, 0.3);
            padding-bottom: 15px;
        }
        
        .modal_title {
            font-size: 1.5rem;
            color: var(--primary-color);
        }
        
        .close_button {
            background: none;
            border: none;
            color: var(--primary-color);
            font-size: 1.5rem;
            cursor: pointer;
            transition: all 0.3s ease;
        }
        
        .close_button:hover {
            transform: scale(1.2);
        }
        
        .modal_text {
            line-height: 1.6;
        }
        
        .modal_text h3 {
            margin: 20px 0 10px;
            color: var(--primary-color);
        }
        
        .modal_text p {
            margin-bottom: 15px;
        }
        
        .modal_text ul {
            margin-left: 20px;
            margin-bottom: 15px;
        }
        
        .modal_text li {
            margin-bottom: 8px;
        }
        
        .features_section {
            margin-top: 40px;
        }
        
        .features_title {
            font-size: 1.8rem;
            text-align: center;
            margin-bottom: 30px;
            color: var(--primary-color);
        }
        
        .features_grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 20px;
        }
        
        .feature_card {
            background: rgba(16, 23, 41, 0.6);
            border-radius: 10px;
            padding: 20px;
            border: 1px solid rgba(0, 247, 255, 0.2);
            transition: all 0.3s ease;
        }
        
        .feature_card:hover {
            transform: translateY(-5px);
            border-color: var(--primary-color);
            box-shadow: var(--border-glow);
        }
        
        .feature_icon {
            font-size: 2rem;
            margin-bottom: 15px;
            color: var(--primary-color);
        }
        
        .feature_title {
            font-size: 1.2rem;
            margin-bottom: 10px;
            color: var(--primary-color);
        }
        
        .feature_description {
            font-size: 0.9rem;
            line-height: 1.5;
            opacity: 0.8;
        }
        
        .copyright_section {
            text-align: center;
            margin-top: 40px;
            padding: 20px 0;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            font-size: 0.9rem;
            opacity: 0.7;
        }
        
        @media (max-width: 768px) {
            .title_heading {
                font-size: 2rem;
            }
            
            .card_component {
                padding: 20px;
            }
            
            .question_title {
                font-size: 1.2rem;
            }
            
            .legal_links {
                flex-direction: column;
                align-items: center;
                gap: 15px;
            }
            
            .features_grid {
                grid-template-columns: 1fr;
            }
        }