:root{--bg:#f6f8fc;--card:#fff;--text:#101828;--muted:#667085;--line:#e6eaf2;--blue:#2563eb;--cyan:#06b6d4;--purple:#7c3aed;--red:#ef4444;--orange:#f97316;--green:#16a34a;--shadow:0 20px 50px rgba(15,23,42,.08)}*{box-sizing:border-box}body{margin:0;font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Arial,sans-serif;background:var(--bg);color:var(--text)}button,input,select,textarea{font:inherit}button{border:0;cursor:pointer}.hidden{display:none!important}.primary-btn{background:linear-gradient(135deg,var(--blue),var(--cyan));color:#fff;border-radius:12px;padding:10px 16px;font-weight:700;box-shadow:0 10px 22px rgba(37,99,235,.22)}.primary-btn.small{padding:8px 14px;border-radius:10px}.primary-btn.full{width:100%;padding:13px 18px}.soft-btn{background:#eef4ff;color:#1d4ed8;border-radius:12px;padding:10px 16px;font-weight:700}.ghost-btn{background:#fff;color:#475467;border:1px solid var(--line);border-radius:12px;padding:10px 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