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rgba(124,99,255,.15)}.captcha-input-error{border-color:#ff5f57;animation:shake .4s ease}.captcha-btn{flex-shrink:0;padding:10px 18px;border:none;border-radius:10px;background:linear-gradient(135deg,var(--brand),#5fd6ff);color:#fff;font-weight:700;font-size:14px;cursor:pointer;transition:all .25s ease;box-shadow:0 8px 20px rgba(124,99,255,.3)}.captcha-btn:hover{transform:translateY(-1px);box-shadow:0 12px 28px rgba(124,99,255,.45)}.captcha-error-tip{margin:12px 0 0;color:#ff5f57;font-size:12px;font-weight:600}@keyframes shake{0%,to{transform:translateX(0)}25%{transform:translateX(-6px)}50%{transform:translateX(6px)}75%{transform:translateX(-3px)}}