*{margin:0;padding:0;box-sizing:border-box}
html,body{height:100%}
body{background:#ffffff;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;display:flex;flex-direction:column;padding:20px 16px 0;min-height:100vh}
#app{flex:1;display:flex;flex-direction:column;width:100%}
.header-title{text-align:center;font-size:28px;font-weight:700;color:#000000;letter-spacing:0.5px;padding:0 0 8px 0}
.container{width:100%;max-width:820px;display:flex;flex-direction:column;flex:1;padding-left:0;margin:0 auto}
.spacer-3{height:40px}
.spacer-2{height:28px}
.spacer-1{height:14px}
.question-block{margin-bottom:6px;padding-left:0}
.q-header{display:flex;align-items:baseline;gap:6px;font-size:17px;font-weight:500;color:#000000;padding-left:0}
.q-header .required-star{color:#e74c3c;font-size:20px;font-weight:700;line-height:1}
.q-header .q-number,.q-header .q-dot,.q-header .q-title{color:#000000}
.options-grid{display:flex;flex-direction:column;gap:14px;padding-left:0}
.option-item{display:flex;align-items:center;gap:10px;cursor:pointer;font-size:16px;color:#000000;padding:8px 0;user-select:none}
.option-item .radio-custom{flex-shrink:0;width:22px;height:22px;border-radius:50%;border:1.5px solid #d0d5de;background:#ffffff;display:flex;align-items:center;justify-content:center;transition:all .2s}
.option-item .radio-custom .inner-dot{width:11px;height:11px;border-radius:50%;background:transparent;transition:all .2s}
.option-item.selected .radio-custom{border-color:#4a7cf7}
.option-item.selected .radio-custom .inner-dot{background:#4a7cf7;width:11px;height:11px}
.option-item .opt-label,.option-item .opt-text{color:#000000}
.option-item input[type="radio"]{display:none}
.text-input-block{padding-left:0}
.text-input-block textarea{width:100%;min-height:120px;padding:14px 16px;font-size:16px;font-family:inherit;border:1.5px solid #d0d5de;border-radius:0;background:#ffffff;color:#000000;transition:border-color .25s;resize:vertical;outline:none;line-height:1.6}
.text-input-block textarea:focus{border-color:#4a7cf7}
.text-input-block textarea::placeholder{color:#b0b8c4}
.submit-wrap{display:flex;justify-content:center;margin-top:36px;padding-top:8px;width:100%}
.submit-btn{background:#4a7cf7;color:#ffffff;border:none;border-radius:8px;padding:14px 48px;font-size:18px;font-weight:600;letter-spacing:.5px;cursor:pointer;transition:background .2s,transform .1s;width:auto;min-width:160px}
.submit-btn:hover{background:#3a67d0}
.submit-btn:active{transform:scale(.96)}
.submit-btn:disabled{opacity:.6;cursor:not-allowed}
.toast{position:fixed;top:20px;left:50%;transform:translateX(-50%);background:#1e2330;color:#fff;padding:12px 28px;border-radius:40px;font-size:15px;z-index:9999;box-shadow:0 4px 20px rgba(0,0,0,.2);display:none;max-width:90%;text-align:center}
.toast.error{background:#e74c3c}
.toast.success{background:#27ae60}
.footer{text-align:center;padding:20px 0 24px;font-size:14px;color:#000000;flex-shrink:0;width:100%}
.footer .copyright{color:#000000;text-decoration:none}
.footer .icp{color:#000000;text-decoration:none;transition:color .2s;cursor:pointer}
.footer .icp:hover{color:#4a7cf7}


@media screen and (max-width: 768px) {
    body{padding:16px 14px 0}
    .header-title{font-size:24px;padding-bottom:4px}
    .spacer-3{height:32px}
    .spacer-2{height:20px}
    .q-header{font-size:16px;gap:4px}
    .q-header .required-star{font-size:18px}
    .options-grid{gap:12px}
    .option-item{font-size:15px;padding:6px 0}
    .option-item .radio-custom{width:20px;height:20px}
    .option-item .radio-custom .inner-dot{width:10px;height:10px}
    .option-item.selected .radio-custom .inner-dot{width:10px;height:10px}
    .text-input-block textarea{min-height:100px;font-size:15px;padding:12px 14px}
    .submit-btn{padding:12px 36px;font-size:16px;min-width:140px;width:100%;max-width:300px}
    .footer{font-size:12px;padding:16px 0 20px}
    .toast{font-size:14px;padding:10px 20px}
    .container{margin:0}
}
@media screen and (max-width: 480px) {
    body{padding:12px 10px 0}
    .header-title{font-size:20px}
    .q-header{font-size:15px}
    .option-item{font-size:14px}
    .text-input-block textarea{min-height:90px;font-size:14px}
    .submit-btn{padding:12px 20px;font-size:15px;min-width:120px}
    .footer{font-size:11px}
}