:root{color-scheme:dark;font:16px/1.6 "Segoe UI","Microsoft YaHei",sans-serif;color:#dce4e8;background:#0c1015;--muted:#83929e;--line:#29343e;--accent:#a9ebc5}*{box-sizing:border-box}body{margin:0;min-height:100svh;display:flex;flex-direction:column;justify-content:center;padding:48px 24px}button,input{font:inherit}button{cursor:pointer}button:focus-visible,input:focus-visible{outline:2px solid var(--accent);outline-offset:4px}.login-shell{width:min(920px,100%);margin:auto;display:grid;grid-template-columns:1.12fr 1fr;border:1px solid var(--line);border-radius:16px;overflow:hidden}.intro{padding:48px;background:#101820;border-right:1px solid var(--line)}.brand{display:flex;gap:12px;align-items:center;font-size:22px;font-weight:650;letter-spacing:-.5px}.mark{display:grid;place-items:center;width:38px;height:38px;background:var(--accent);color:#10271a;border-radius:9px;font:700 24px monospace}.eyebrow{font-size:12px;letter-spacing:2px;color:var(--muted);margin:0 0 12px}.intro>.eyebrow{margin-top:64px}h1{font-size:52px;line-height:1.18;letter-spacing:-2px;margin:0 0 24px;font-weight:650}.description{color:#a5b5c0;margin:0}.subjects{display:flex;gap:25px;margin-top:44px;color:#a5b5c0;font-size:13px}.subjects i{font-style:normal;color:var(--accent);margin-right:5px}.signin{padding:56px 40px;background:#141a21;display:flex;flex-direction:column;justify-content:center}h2{font-size:27px;line-height:1.3;margin:0 0 12px;font-weight:650}.hint{color:var(--muted);font-size:14px;margin:0 0 32px}label{display:block;font-size:14px;margin:18px 0 8px}input{width:100%;min-height:46px;padding:10px 12px;color:#e9f0f4;border:1px solid #3a4855;background:#0c1219;border-radius:7px}.password-field{position:relative}.password-field input{padding-right:66px}.password-field button{position:absolute;right:3px;top:3px;bottom:3px;color:#a5b5c0;background:transparent;border:0;padding:0 13px;font-size:13px;border-radius:5px}.error{color:#f5aaa2;font-size:13px;min-height:24px;margin:12px 0}.primary{width:100%;min-height:47px;border:1px solid var(--accent);border-radius:7px;background:var(--accent);color:#10271a;font-weight:650}.primary:hover{background:#c0f5d5}.primary:disabled{opacity:.6;cursor:wait}.footnote{font-size:12px;color:var(--muted);margin:24px 0 0}footer{text-align:center;color:#657581;font-size:12px;padding-top:28px}@media(max-width:680px){body{padding:24px 18px}.login-shell{max-width:440px;grid-template-columns:1fr}.intro{padding:25px 27px;border-right:0;border-bottom:1px solid var(--line)}.intro>.eyebrow,.description,.subjects{display:none}h1{font-size:26px;letter-spacing:0;margin:22px 0 0}h1 br{display:none}.signin{padding:30px 27px}.hint{margin-bottom:12px}}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto}}