*{margin:0;padding:0;box-sizing:border-box}
body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;font-size:14px;line-height:1.6;color:#333}
a{color:#4a90d9;text-decoration:none}
.btn{display:inline-block;padding:10px 20px;font-size:14px;font-weight:500;text-align:center;border:none;border-radius:8px;cursor:pointer}
.btn-primary{background:#4a90d9;color:#fff}
.btn-primary:hover{background:#357abd}
.btn-success{background:#28a745;color:#fff}
.btn-danger{background:#dc3545;color:#fff}
.btn-outline{background:transparent;border:1px solid #4a90d9;color:#4a90d9}
.btn-sm{padding:6px 12px;font-size:12px}
.btn-lg{padding:12px 24px;font-size:16px}
.card{background:#fff;border-radius:8px;box-shadow:0 2px 10px rgba(0,0,0,0.1);padding:24px;margin-bottom:20px}
.form-group{margin-bottom:16px}
.form-group label{display:block;margin-bottom:6px;font-weight:500}
.form-control{width:100%;padding:10px 12px;border:1px solid #ddd;border-radius:8px;font-size:14px}
.form-control:focus{outline:none;border-color:#4a90d9}
textarea.form-control{resize:vertical}
.survey-container{max-width:800px;margin:20px auto;padding:0 15px}
.survey-card{background:#fff;border-radius:12px;box-shadow:0 10px 40px rgba(0,0,0,0.2);overflow:hidden}
.survey-header{background:linear-gradient(135deg,#4a90d9,#6bb3e0);color:#fff;padding:40px 20px;text-align:center}
.survey-header h1{font-size:28px;margin-bottom:12px}
.survey-header p{opacity:0.9}
.question-item{background:#fff;border-radius:8px;padding:20px;margin-bottom:16px;box-shadow:0 1px 3px rgba(0,0,0,0.05)}
.question-title{font-size:16px;font-weight:500;margin-bottom:12px}
.question-number{color:#4a90d9;font-weight:600}
.required-mark{color:#dc3545}
.option-item{display:flex;align-items:center;padding:8px 0}
.option-item input{margin-right:10px;width:18px;height:18px}
.option-item label{cursor:pointer}
.submit-section{text-align:center;padding:30px 0}
.auto-save-tip{position:fixed;bottom:20px;right:20px;background:#fff;padding:10px 16px;border-radius:8px;box-shadow:0 2px 8px rgba(0,0,0,0.1);font-size:12px;color:#666;display:none;z-index:1000}
.auto-save-tip.show{display:block}