:root{--navy:#0b2847;--blue:#1266b1;--blue2:#0d4d8f;--cyan:#25b7ca;--ink:#142235;--muted:#68778b;--line:#dce5ed;--bg:#f3f7fa;--white:#fff;--shadow:0 18px 50px rgba(19,48,77,.12)}*{box-sizing:border-box}body{margin:0;font-family:"Segoe UI","Microsoft YaHei",Arial,sans-serif;color:var(--ink);background:var(--bg);font-size:16px}.hidden{display:none!important}.login-shell{min-height:100vh;display:grid;grid-template-columns:1.08fr .92fr;background:white}.brand-panel{position:relative;overflow:hidden;padding:9vw;display:flex;align-items:center;gap:28px;color:white;background:linear-gradient(145deg,#071f38 0%,#0b477f 62%,#1685a4 100%)}.brand-panel:after{content:"";position:absolute;inset:auto -15% -30% 20%;height:58%;border:1px solid rgba(255,255,255,.16);transform:skewY(-9deg)}.brand-mark{width:86px;height:86px;display:grid;place-items:center;border:1px solid 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