:root{--blue:#2563eb;--blue-2:#1d4ed8;--ink:#172033;--muted:#6b7280;--line:#e5eaf2;--surface:#fff;--bg:#f4f7fb;--green:#138a5d;--orange:#bd6b0b;--red:#ba3a3a;--shadow:0 14px 38px rgba(30,55,90,.08)}*{box-sizing:border-box}body{margin:0;color:var(--ink);font:15px/1.55 -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft Yahei",sans-serif;background:var(--bg)}button,input,select,textarea{font:inherit}button{cursor:pointer;border:0}.login-shell{min-height:100vh;display:grid;place-items:center;background:radial-gradient(circle at 15% 15%,#dbeafe,transparent 34%),linear-gradient(135deg,#eff6ff 0%,#f8fafc 55%,#e0ecff 100%)}.login-card{width:min(430px,calc(100% - 32px));padding:42px 40px 36px;background:#fff;border:1px solid #edf1f7;border-radius:24px;box-shadow:0 22px 60px 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