:root{--blue:#1877f2;--navy:#09294b;--bg:#f4f7fb;--ink:#172b4d;--muted:#718096;--line:#e6edf5}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:14px Arial,"Microsoft YaHei",sans-serif}.login-shell{display:grid;grid-template-columns:minmax(360px,43%) 1fr;min-height:100vh}.login-visual{display:flex;flex-direction:column;justify-content:space-between;padding:42px 11%;background:linear-gradient(155deg,#10385f,#082443);color:#fff}.brand{display:flex;align-items:center;gap:11px;font-size:20px;font-weight:800}.mark,.panel-mark{display:grid;place-items:center;width:34px;height:34px;border-radius:10px;background:#3989f7;color:#fff;font-size:23px;font-weight:800}.eyebrow{margin:0 0 13px;color:#73b0ff;font-size:11px;font-weight:800;letter-spacing:1.5px}.login-visual h1{margin:0;font-size:clamp(32px,4vw,52px);line-height:1.12;letter-spacing:-1px}.visual-copy{margin-top:20px;color:#b7cde5;font-size:15px;line-height:1.7}.visual-foot{color:#7290b1;font-size:10px;letter-spacing:1.3px}.login-panel{display:grid;place-items:center;padding:28px}.login-card{width:min(380px,100%);padding:40px;border:1px solid var(--line);border-radius:18px;background:#fff;box-shadow:0 16px 45px #173d6414}.panel-mark{margin-bottom:22px}.login-card h2{margin:0;font-size:28px}.subtitle{margin:8px 0 30px;color:var(--muted)}label{display:block;margin-top:18px;color:#435a75;font-size:12px;font-weight:700}input{display:block;width:100%;margin-top:8px;padding:13px 14px;border:1px solid #d7e2ef;border-radius:9px;outline:0;font:14px inherit}input:focus{border-color:var(--blue);box-shadow:0 0 0 3px #1877f21c}.login-card button{width:100%;margin-top:25px;padding:13px;border:0;border-radius:9px;background:var(--blue);color:#fff;font-weight:800;cursor:pointer}.login-card button:disabled{opacity:.65}.error{min-height:20px;margin:13px 0 0;color:#c83d32;font-size:12px}@media(max-width:760px){.login-shell{grid-template-columns:1fr}.login-visual{min-height:230px;padding:26px 24px}.login-visual h1{font-size:34px}.visual-copy,.visual-foot{display:none}.login-panel{padding:22px}.login-card{padding:30px}}