:root{color-scheme:light;--ink:#202831;--muted:#617086;--line:#e6eaf0;--blue:#346bd6}*{box-sizing:border-box}body{margin:0;min-height:100dvh;background:#f3f5f8;color:var(--ink);font:14px/1.6 "Segoe UI","Microsoft YaHei UI",sans-serif;display:grid;place-items:center;padding:32px 20px}a{color:inherit;text-decoration:none}.login-shell{width:min(100%,420px)}.login-brand{display:flex;gap:12px;align-items:center;justify-content:center;margin-bottom:32px}.login-brand img{width:42px;height:42px}.login-brand span{font-size:21px;font-weight:700}.login-brand small{display:block;font-size:9px;letter-spacing:1.8px;font-weight:500;color:var(--muted)}.login-card{padding:36px;background:#fff;border:1px solid var(--line);border-radius:16px;box-shadow:0 14px 48px #26365306}.eyebrow{font-size:11px;color:var(--muted)}h1{font-size:28px;margin:12px 0 8px;letter-spacing:-.5px}.intro{margin:0 0 28px;color:var(--muted);font-size:13px}label{display:block;font-size:12px;font-weight:600;margin-bottom:8px}input{width:100%;height:46px;border:1px solid #d6dee9;border-radius:7px;padding:0 12px;font:15px "Segoe UI","Microsoft YaHei UI",sans-serif;letter-spacing:.8px}input:focus{outline:2px solid #346bd633;border-color:var(--blue)}button{display:flex;align-items:center;justify-content:space-between;width:100%;height:46px;padding:0 16px;margin-top:12px;background:var(--blue);color:#fff;border:0;border-radius:7px;font:600 13px "Segoe UI","Microsoft YaHei UI",sans-serif;cursor:pointer}button:hover{background:#2b5fc4}button:disabled{opacity:.6;cursor:wait}.error{min-height:19px;margin:8px 0 0;color:#a33f43;font-size:12px}.device-help{padding-top:22px;margin:22px 0 0;border-top:1px solid var(--line);font-size:11px;line-height:1.9;color:var(--muted)}.login-foot{text-align:center;color:var(--muted);font-size:11px;margin:24px 0 0}@media(max-width:480px){.login-card{padding:28px 24px}h1{font-size:26px}}@media(prefers-reduced-motion:reduce){*{transition:none!important}}