* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

:root {
    --primary: #6C63FF;
    --primary-light: #8A84FF;
    --primary-dark: #554FD8;
    --secondary: #FF6584;
    --secondary-light: #FF8DA1;
    --dark: #2A2D43;
    --dark-light: #3A3E5A;
    --light: #F7F7FF;
    --gray: #E2E2E2;
    --gray-dark: #A0A0A0;
    --success: #4CAF50;
    --error: #F44336;
    --warning: #FF9800;
}

body {
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
    color: var(--dark);
    line-height: 1.6;
}

.container {
    max-width: 900px;
    width: 100%;
    background: white;
    border-radius: 20px;
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
    overflow: hidden;
}

.header {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    color: white;
    padding: 30px;
    text-align: center;
    position: relative;
}

.header h1 {
    font-size: 2.2rem;
    margin-bottom: 10px;
    font-weight: 700;
}

.header p {
    font-size: 1.1rem;
    opacity: 0.9;
    max-width: 600px;
    margin: 0 auto;
}

.ai-avatar {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    background: white;
    margin: 0 auto 20px;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 40px;
    color: var(--primary);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.content {
    padding: 30px;
}

/* 进度指示器 */
.progress-container {
    margin-bottom: 30px;
}

.progress-bar {
    height: 8px;
    background: var(--gray);
    border-radius: 4px;
    margin-bottom: 20px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: var(--primary);
    border-radius: 4px;
    width: 16.66%; /* 初始进度 */
    transition: width 0.5s ease;
}

.progress-steps {
    display: flex;
    justify-content: space-between;
}

.progress-step {
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
    flex: 1;
}

.progress-step::before {
    content: '';
    position: absolute;
    top: 15px;
    left: -50%;
    width: 100%;
    height: 2px;
    background: var(--gray);
    z-index: 1;
}

.progress-step:first-child::before {
    display: none;
}

.progress-step.active::before {
    background: var(--primary);
}

.step-number {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background: var(--gray);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    margin-bottom: 8px;
    z-index: 2;
    transition: all 0.3s ease;
}

.progress-step.active .step-number {
    background: var(--primary);
}

.step-label {
    font-size: 0.8rem;
    color: var(--gray-dark);
    text-align: center;
}

.progress-step.active .step-label {
    color: var(--primary);
    font-weight: 500;
}

/* 表单步骤 */
.form-step {
    display: none;
}

.form-step.active {
    display: block;
    animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.step-header {
    text-align: center;
    margin-bottom: 30px;
}

.step-header h2 {
    font-size: 1.8rem;
    color: var(--dark);
    margin-bottom: 10px;
}

.step-header p {
    font-size: 1.1rem;
    color: var(--dark-light);
}

/* 大型评分选项 */
.rating-large {
    display: flex;
    justify-content: space-between;
    gap: 15px;
    margin-top: 20px;
}

.rating-option-large {
    flex: 1;
    text-align: center;
    padding: 20px 10px;
    border: 2px solid var(--gray);
    border-radius: 15px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.rating-option-large:hover {
    border-color: var(--primary);
    background: rgba(108, 99, 255, 0.05);
    transform: translateY(-2px);
}

.rating-option-large.selected {
    border-color: var(--primary);
    background: var(--primary);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(108, 99, 255, 0.3);
}

.rating-icon {
    font-size: 32px;
    margin-bottom: 10px;
}

.rating-text {
    font-size: 1rem;
    font-weight: 500;
}

/* 大型复选框选项 */
.checkbox-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 15px;
    margin-top: 20px;
}

.checkbox-option-large input {
    display: none;
}

.checkbox-option-large label {
    display: flex;
    align-items: flex-start;
    padding: 20px;
    border: 2px solid var(--gray);
    border-radius: 15px;
    cursor: pointer;
    transition: all 0.3s ease;
    height: 100%;
}

.checkbox-option-large label:hover {
    border-color: var(--primary);
    transform: translateY(-2px);
}

.checkbox-option-large input:checked + label {
    border-color: var(--primary);
    background: rgba(108, 99, 255, 0.1);
    color: var(--primary);
}

.checkbox-icon {
    font-size: 24px;
    margin-right: 15px;
    color: var(--primary);
    flex-shrink: 0;
}

.checkbox-content {
    text-align: left;
}

.checkbox-title {
    font-weight: 600;
    margin-bottom: 5px;
}

.checkbox-description {
    font-size: 0.9rem;
    color: var(--gray-dark);
}

/* 表单控件 */
.form-group {
    margin-bottom: 30px;
}

.form-control {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid var(--gray);
    border-radius: 10px;
    font-size: 1rem;
    transition: all 0.3s ease;
    resize: vertical;
}

.form-control:focus {
    border-color: var(--primary);
    outline: none;
    box-shadow: 0 0 0 3px rgba(108, 99, 255, 0.2);
}

.hint-text {
    font-size: 0.9rem;
    color: var(--gray-dark);
    margin-top: 8px;
}

/* 步骤操作按钮 */
.step-actions {
    display: flex;
    justify-content: space-between;
    margin-top: 30px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 10px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    gap: 8px;
}

.btn:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(108, 99, 255, 0.3);
}

.btn:active {
    transform: translateY(0);
}

.btn:disabled {
    background: var(--gray-dark);
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.btn-prev {
    background: var(--gray-dark);
}

.btn-prev:hover {
    background: var(--dark-light);
}

.btn-next, .btn-submit {
    background: var(--primary);
}

.btn-secondary {
    background: var(--secondary);
}

.btn-secondary:hover {
    background: var(--secondary-light);
}

.btn-loading {
    display: flex;
    align-items: center;
    gap: 8px;
}

.error-message {
    color: var(--error);
    font-size: 0.9rem;
    margin-top: 5px;
    display: none;
}

.error-message.show {
    display: block;
}

.notification {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: 15px 25px;
    background: white;
    color: var(--dark);
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    transform: translateX(150%);
    transition: transform 0.5s ease;
    z-index: 1000;
    border-left: 4px solid var(--success);
}

.notification.show {
    transform: translateX(0);
}

.notification.error {
    border-left-color: var(--error);
}

.notification-content {
    display: flex;
    align-items: center;
    gap: 10px;
}

.notification-icon {
    font-size: 1.2rem;
}

.notification-icon.success {
    color: var(--success);
}

.notification-icon.error {
    color: var(--error);
}

.footer {
    text-align: center;
    padding: 20px;
    color: var(--dark);
    opacity: 0.7;
    font-size: 0.9rem;
    border-top: 1px solid var(--gray);
}

/* 感谢页面样式 */
.thank-you-container .header {
    background: linear-gradient(135deg, var(--secondary) 0%, var(--secondary-light) 100%);
}

.thank-you-message {
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
}

.liuliu-avatar {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--secondary) 0%, var(--secondary-light) 100%);
    margin: 0 auto 30px;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 50px;
    color: white;
    box-shadow: 0 10px 25px rgba(255, 101, 132, 0.3);
}

.liuliu-icon {
    font-weight: bold;
}

.message-bubble {
    background: var(--light);
    border-radius: 20px;
    padding: 30px;
    margin-bottom: 30px;
    position: relative;
    text-align: left;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.message-bubble::before {
    content: '';
    position: absolute;
    top: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 0;
    border-left: 10px solid transparent;
    border-right: 10px solid transparent;
    border-bottom: 10px solid var(--light);
}

.message-content p {
    margin-bottom: 15px;
    font-size: 1.1rem;
    line-height: 1.6;
}

.signature {
    text-align: right;
    margin-top: 20px;
    font-style: italic;
    color: var(--secondary);
}

.thank-you-actions {
    display: flex;
    justify-content: center;
    gap: 15px;
    flex-wrap: wrap;
}

/* 管理员页面样式 */
.admin-container {
    max-width: 1200px;
}

.admin-login {
    max-width: 400px;
    margin: 0 auto;
    text-align: center;
}

.admin-login h2 {
    margin-bottom: 20px;
    color: var(--dark);
}

.admin-dashboard h2 {
    margin-bottom: 20px;
    color: var(--dark);
    text-align: center;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background: var(--light);
    border-radius: 10px;
    padding: 20px;
    text-align: center;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.05);
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 5px;
}

.stat-label {
    color: var(--dark-light);
    font-size: 0.9rem;
}

.feature-stats {
    margin-bottom: 30px;
}

.feature-stats h3 {
    margin-bottom: 15px;
    color: var(--dark);
}

.feature-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 0;
    border-bottom: 1px solid var(--gray);
}

.feature-name {
    display: flex;
    align-items: center;
    gap: 8px;
}

.feature-count {
    font-weight: 600;
    color: var(--primary);
}

.responses-list h3 {
    margin-bottom: 15px;
    color: var(--dark);
}

.table-container {
    overflow-x: auto;
}

.responses-table {
    width: 100%;
    border-collapse: collapse;
}

.responses-table th,
.responses-table td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid var(--gray);
}

.responses-table th {
    background: var(--light);
    font-weight: 600;
}

.responses-table tr:hover {
    background: rgba(108, 99, 255, 0.05);
}

.admin-actions {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-top: 30px;
}

/* 模态框样式 */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal.show {
    display: flex;
}

.modal-content {
    background: white;
    border-radius: 15px;
    width: 90%;
    max-width: 600px;
    max-height: 80vh;
    overflow-y: auto;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 25px;
    border-bottom: 1px solid var(--gray);
}

.modal-header h2 {
    margin: 0;
    color: var(--dark);
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--gray-dark);
}

.modal-close:hover {
    color: var(--dark);
}

.modal-body {
    padding: 25px;
}

.response-detail {
    margin-bottom: 15px;
}

.response-detail label {
    font-weight: 600;
    display: block;
    margin-bottom: 5px;
    color: var(--dark);
}

.response-detail .value {
    padding: 8px 12px;
    background: var(--light);
    border-radius: 5px;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .header {
        padding: 20px;
    }
    
    .header h1 {
        font-size: 1.8rem;
    }
    
    .content {
        padding: 20px;
    }
    
    .rating-large {
        flex-direction: column;
        gap: 10px;
    }
    
    .checkbox-grid {
        grid-template-columns: 1fr;
    }
    
    .progress-steps {
        flex-wrap: wrap;
        gap: 10px;
    }
    
    .progress-step {
        flex: 0 0 calc(33.333% - 10px);
    }
    
    .progress-step::before {
        display: none;
    }
    
    .step-actions {
        flex-direction: column;
        gap: 10px;
    }
    
    .btn {
        width: 100%;
    }
    
    .thank-you-actions {
        flex-direction: column;
    }
    
    .stats-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 480px) {
    body {
        padding: 10px;
    }
    
    .container {
        border-radius: 15px;
    }
    
    .header h1 {
        font-size: 1.5rem;
    }
    
    .ai-avatar {
        width: 80px;
        height: 80px;
        font-size: 30px;
    }
    
    .liuliu-avatar {
        width: 100px;
        height: 100px;
        font-size: 40px;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .progress-step {
        flex: 0 0 calc(50% - 10px);
    }
}