/* Stellar Constellation Animation Background */
        @keyframes stellarTwinkleEffect {
            0%, 100% { opacity: 0.3; }
            50% { opacity: 1; }
        }
        
        @keyframes celestialMovementPattern {
            from { transform: translateY(0px); }
            to { transform: translateY(-2000px); }
        }
        
        .interstellarCosmicBackground {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            z-index: -1;
            background: linear-gradient(to bottom, #0a0e2a, #1a1f4e);
            overflow: hidden;
        }
        
        .celestialStellarBody {
            position: absolute;
            background-color: white;
            border-radius: 50%;
            animation: stellarTwinkleEffect 3s infinite;
        }
        
        .stellarNanoClassification {
            width: 1px;
            height: 1px;
        }
        
        .stellarMicroClassification {
            width: 2px;
            height: 2px;
        }
        
        .stellarMacroClassification {
            width: 3px;
            height: 3px;
            animation: stellarTwinkleEffect 5s infinite;
        }
        
        /* Primary Container Architecture */
        .universalRegistrationContainer {
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 0px;
        }
        
        .quantumRegistrationInterface {
            background: rgba(255, 255, 255, 0.97);
            backdrop-filter: blur(15px);
            border-radius: 28px;
            box-shadow: 0 25px 70px rgba(0, 0, 0, 0.35);
            max-width: 850px;
            width: 100%;
            overflow: hidden;
            border: 1px solid rgba(255, 255, 255, 0.25);
        }
        
        .galacticWelcomePresentation {
            background: linear-gradient(135deg, #5d6afb 0%, #8a4db3 100%);
            color: white;
            padding: 45px;
            text-align: center;
        }
        
        .nebulousPresentationTitle {
            font-size: 2.8rem;
            margin-bottom: 15px;
            font-weight: 800;
        }
        
        .stellarPresentationSubtitle {
            font-size: 1.3rem;
            opacity: 0.92;
        }
        
        .registrationContentFramework {
            padding: 45px;
        }
        
        /* Welcome Interface Components */
        .welcomeInterfaceDisplay {
            text-align: center;
        }
        
        .cosmicVisualPresentation {
            border-radius: 20px;
            overflow: hidden;
            margin-bottom: 35px;
            box-shadow: 0 15px 40px rgba(0, 0, 0, 0.25);
        }
        
        .welcomeInterfaceHeading {
            font-size: 2.2rem;
            color: #2a2a2a;
            margin-bottom: 35px;
            line-height: 1.3;
        }
        
        .membershipAdvantageContainer {
            text-align: left;
            max-width: 550px;
            margin: 0 auto 45px;
        }
        
        .advantagePresentationItem {
            display: flex;
            align-items: flex-start;
            margin-bottom: 18px;
            font-size: 1.15rem;
            color: #333;
        }
        
        .advantageVisualIndicator {
            color: #45c75a;
            margin-right: 12px;
            font-style: normal;
            font-weight: bold;
        }
        
        /* Interactive Button Components */
        .quantumInteractiveButton {
            background: green;
            color: white;
            border: none;
            padding: 18px 40px;
            border-radius: 14px;
            font-size: 1.2rem;
            font-weight: 700;
            cursor: pointer;
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 12px;
        }
        
        .quantumInteractiveButton:hover {
            transform: translateY(-4px);
            box-shadow: 0 15px 35px rgba(93, 106, 251, 0.45);
        }
        
        /* Question Navigation Framework */
        .registrationQuestionnaireStep {
            display: none;
            animation: questionnaireTransitionEffect 0.6s ease;
        }
        
        .registrationQuestionnaireStep.stepActive {
            display: block;
        }
        
        @keyframes questionnaireTransitionEffect {
            from { opacity: 0; transform: translateY(25px); }
            to { opacity: 1; transform: translateY(0); }
        }
        
        .questionnaireHeaderPresentation {
            display: flex;
            align-items: center;
            margin-bottom: 35px;
        }
        
        .questionnaireStepIdentifier {
            background: linear-gradient(135deg, #5d6afb 0%, #8a4db3 100%);
            color: white;
            width: 46px;
            height: 46px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1.3rem;
            margin-right: 18px;
        }
        
        .questionnaireStepHeading {
            font-size: 1.6rem;
            color: #2a2a2a;
            font-weight: 700;
            margin-bottom: 8px;
        }
        
        .questionnaireStepDescription {
            color: #666;
            font-size: 1rem;
            line-height: 1.5;
        }
        
        /* Response Selection Interface */
        .responseSelectionGrid {
            display: grid;
            gap: 18px;
            margin: 35px 0;
        }
        
        .selectionOptionComponent {
            border: 2.5px solid #e8e8e8;
            border-radius: 14px;
            padding: 22px;
            cursor: pointer;
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            background: white;
        }
        
        .selectionOptionComponent:hover {
            border-color: #5d6afb;
            transform: translateX(8px);
            box-shadow: 0 8px 25px rgba(93, 106, 251, 0.15);
        }
        
        .selectionOptionComponent.optionSelected {
            border-color: #5d6afb;
            background: linear-gradient(135deg, rgba(93, 106, 251, 0.12) 0%, rgba(138, 77, 179, 0.12) 100%);
            transform: translateX(8px);
        }
        
        .selectionOptionText {
            font-size: 1.15rem;
            color: #333;
            margin: 0;
            font-weight: 500;
        }
        
        /* Progress Visualization */
        .registrationProgressTracker {
            margin-top: 45px;
            padding-top: 25px;
            border-top: 1px solid #f0f0f0;
        }
        
        .progressVisualizationBar {
            height: 10px;
            background: #f5f5f5;
            border-radius: 5px;
            overflow: hidden;
            margin-bottom: 18px;
        }
        
        .progressVisualizationFill {
            height: 100%;
            background: linear-gradient(135deg, #5d6afb 0%, #8a4db3 100%);
            width: 0%;
            transition: width 0.6s cubic-bezier(0.4, 0, 0.2, 1);
            border-radius: 5px;
        }
        
        .progressTextualDisplay {
            display: flex;
            justify-content: space-between;
            color: #777;
            font-size: 0.95rem;
            font-weight: 500;
        }
        
        /* 移除手动导航按钮相关样式 */
        
        /* Submission Interface */
        .finalSubmissionInterface {
            text-align: center;
            padding: 10px;
            background: linear-gradient(135deg, rgba(93, 106, 251, 0.08) 0%, rgba(138, 77, 179, 0.08) 100%);
            border-radius: 20px;
            margin-top: 5px;
            display: none;
        }
        
        .finalSubmissionInterface.interfaceActive {
            display: block;
            animation: questionnaireTransitionEffect 0.6s ease;
        }
        
        .whatsappIntegrationButton {
            background: linear-gradient(135deg, #25D366 0%, #128C7E 100%);
            color: white;
            padding: 20px 50px;
            font-size: 1.25rem;
            border-radius: 14px;
            border: none;
            cursor: pointer;
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            display: inline-flex;
            align-items: center;
            gap: 12px;
            font-weight: 700;
            margin-top: 25px;
        }
        
        .whatsappIntegrationButton:hover {
            transform: translateY(-4px);
            box-shadow: 0 15px 35px rgba(37, 211, 102, 0.45);
        }
        
        /* Legal Information Components */
        .legalInformationContainer {
            margin-top: 50px;
            padding-top: 30px;
            border-top: 1px solid #eee;
            text-align: center;
        }
        
        .legalLinkComponent {
            color: #5d6afb;
            text-decoration: none;
            margin: 0 15px;
            font-size: 0.95rem;
            cursor: pointer;
            transition: color 0.2s ease;
        }
        
        .legalLinkComponent:hover {
            color: #8a4db3;
            text-decoration: underline;
        }
        
        .copyrightInformation {
            margin-top: 25px;
            color: #888;
            font-size: 0.9rem;
        }
        
        /* Modal Dialog Components */
        .legalModalOverlay {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.7);
            display: flex;
            align-items: center;
            justify-content: center;
            z-index: 1000;
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s ease;
        }
        
        .legalModalOverlay.modalActive {
            opacity: 1;
            visibility: visible;
        }
        
        .legalModalContent {
            background: white;
            border-radius: 20px;
            width: 90%;
            max-width: 700px;
            max-height: 80vh;
            overflow-y: auto;
            padding: 40px;
            position: relative;
            transform: translateY(30px);
            transition: transform 0.3s ease;
        }
        
        .legalModalOverlay.modalActive .legalModalContent {
            transform: translateY(0);
        }
        
        .modalCloseButton {
            position: absolute;
            top: 20px;
            right: 20px;
            background: none;
            border: none;
            font-size: 1.5rem;
            cursor: pointer;
            color: #666;
        }
        
        .modalTitle {
            font-size: 1.8rem;
            color: #2a2a2a;
            margin-bottom: 25px;
            padding-right: 40px;
        }
        
        .modalContent {
            color: #444;
            line-height: 1.7;
            font-size: 1rem;
        }
        
        /* Responsive Design Framework */
        @media (max-width: 768px) {
            .quantumRegistrationInterface {
                margin: 15px;
                border-radius: 20px;
            }
            
            .galacticWelcomePresentation {
                padding: 35px 25px;
            }
            
            .nebulousPresentationTitle {
                font-size: 2.2rem;
            }
            
            .registrationContentFramework {
                padding: 10px 10px;
            }
            
            .selectionOptionComponent {
                padding: 18px;
            }
            
            .legalLinkComponent {
                display: block;
                margin: 10px 0;
            }
            
            .legalModalContent {
                padding: 30px 25px;
            }
        }
        
        /* Warning Styling */
        .investmentWarningNotice {
            background: linear-gradient(135deg, #ffecd2 0%, #fcb69f 100%);
            border-left: 0px solid #ff6b6b;
            padding: 20px;
            border-radius: 10px;
            margin: 30px 0;
            color: #333;
        }
        
        .warningTitle {
            color: #d63031;
            font-weight: 700;
            margin-bottom: 10px;
            font-size: 1.1rem;
        }