:root{--brand-blue-primary: #0768ac;--brand-blue-primary-dark: #054e83;--brand-blue-primary-container: #d8e8f4;--brand-green-secondary: #7bc4a0;--brand-red-accent: #e53935;--neutral-bg: #faf8f5;--neutral-card: #ffffff;--neutral-variant: #f0edE7;--neutral-divider: #e5e2dc;--neutral-text-primary: #2c2c2c;--neutral-text-secondary: #6b6b6b}*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Microsoft YaHei,sans-serif;background:var(--neutral-bg);color:var(--neutral-text-primary)}.survey-page{max-width:560px;margin:0 auto;padding:24px 20px 48px;min-height:100vh}.survey-header h1{font-size:22px;margin:8px 0}.survey-progress{color:var(--neutral-text-secondary);font-size:14px;margin-bottom:20px}.question-card{background:var(--neutral-card);border-radius:12px;padding:20px;box-shadow:0 1px 4px #0000000f}.question-prompt{font-size:17px;line-height:1.5;margin:0 0 16px}.option-list{display:flex;flex-direction:column;gap:10px}.option{display:flex;align-items:flex-start;gap:10px;padding:12px 14px;border-radius:10px;border:1px solid var(--neutral-divider);cursor:pointer;background:var(--neutral-bg)}.option:has(input:checked){border-color:var(--brand-blue-primary);background:var(--brand-blue-primary-container)}.option input{margin-top:2px}.option-hint{display:block;font-size:13px;color:var(--neutral-text-secondary);margin-top:2px}.btn-primary{margin-top:20px;width:100%;padding:13px;border:none;border-radius:10px;background:var(--brand-blue-primary);color:#fff;font-size:16px;cursor:pointer}.btn-primary:disabled{background:var(--neutral-divider);color:var(--neutral-text-secondary);cursor:not-allowed}.btn-primary:not(:disabled):active{background:var(--brand-blue-primary-dark)}.btn-back{margin-top:16px;background:none;border:none;color:var(--neutral-text-secondary);font-size:14px;cursor:pointer}.error-text{color:var(--brand-red-accent);font-size:14px}.result-view{text-align:center;padding-top:60px}.result-serial{display:flex;flex-direction:column;align-items:center;gap:4px;margin:24px 0 16px}.result-serial-label{font-size:14px;color:var(--neutral-text-secondary)}.result-serial strong{color:var(--brand-blue-primary);font-size:28px}.result-serial-hint{font-size:13px;color:var(--neutral-text-secondary)}.result-explanation{color:var(--neutral-text-secondary);line-height:1.6;margin:16px 0}.result-params{background:var(--brand-blue-primary-container);border-radius:12px;padding:16px;text-align:left;display:flex;flex-direction:column;gap:6px;margin:16px 0}