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/* Gentle sky palette, clear tap targets and answer feedback. */
body{background:linear-gradient(145deg,#f4f9fd 0%,#ecf5fc 60%,#faf5ee 100%);background-attachment:fixed}h1{font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;font-weight:650;letter-spacing:-.02em}.button{border-color:#426e91;background:#426e91;border-radius:12px;box-shadow:0 4px 12px #426e9110}.button.secondary{border-color:var(--line);background:#fffefbcc;color:var(--ink);box-shadow:none}.choice{border-radius:14px;transition:background .15s,border-color .15s}.choice[aria-checked=true]{border-color:#6d99b9;box-shadow:inset 3px 0 #6d99b9}.choice:hover{background:#f5faff}.ticket{border-radius:20px;box-shadow:0 10px 35px #5185ac09}.progress{height:5px;border-radius:5px;overflow:hidden}.letter{border-radius:8px}.takeaway{border-radius:18px;border-style:solid}.mark{border-color:#a6bfd2;color:#426e91}.error{color:#a24d38}