:root{--bg:#f5f7f9;--surface:#fff;--surface-soft:#f9fafb;--line:#dde3ea;--line-strong:#c7d0da;--text:#1d2733;--muted:#667386;--faint:#8b96a6;--teal:#0f766e;--teal-soft:#e7f4f1;--green:#16834a;--green-soft:#e8f5ee;--amber:#b56a09;--amber-soft:#fff4df;--rose:#c2414b;--rose-soft:#fdecef;--blue:#315f9c;--blue-soft:#eaf1fb;--shadow:0 16px 40px #1f2c3c14}*{box-sizing:border-box}html{background:var(--bg)}body{background:var(--bg);color:var(--text);margin:0;font-family:Inter,PingFang SC,Microsoft YaHei,Noto Sans CJK SC,Arial,sans-serif}button,input,select{font:inherit}button{cursor:pointer}.login-shell{background:linear-gradient(180deg, #ffffffbd, #f5f7f9eb), var(--bg);place-items:center;min-height:100vh;padding:24px;display:grid}.login-panel{border:1px solid var(--line);background:var(--surface);width:min(100%,420px);box-shadow:var(--shadow);border-radius:8px;padding:28px}.login-brand{grid-template-columns:44px 1fr;align-items:center;gap:12px;margin-bottom:24px;display:grid}.login-brand 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