.auth-page{min-height:100vh;display:flex;align-items:stretch;}
.auth-l{flex:1;background:var(--surface);border-right:1px solid var(--border);display:flex;flex-direction:column;align-items:flex-start;justify-content:center;padding:56px 52px;position:relative;overflow:hidden;}
.auth-l::before{content:'';position:absolute;top:-80px;right:-80px;width:380px;height:380px;border-radius:50%;background:radial-gradient(circle,rgba(79,126,247,.07) 0%,transparent 70%);pointer-events:none;}
.auth-brand{display:flex;align-items:center;gap:9px;margin-bottom:36px;}
.auth-lm{width:36px;height:36px;border-radius:10px;background:var(--accent);display:flex;align-items:center;justify-content:center;font-size:.9rem;color:#fff;font-weight:800;flex-shrink:0;}
.auth-bn{font-size:1.1rem;font-weight:700;letter-spacing:-.02em;color:var(--text);}
.auth-tag{font-size:1.72rem;font-weight:800;letter-spacing:-.03em;line-height:1.22;color:var(--text);margin-bottom:12px;max-width:320px;}
.auth-tag span{color:var(--accent);}
.auth-sub{font-size:.84rem;color:var(--t2);line-height:1.65;max-width:300px;margin-bottom:32px;}
.auth-feats{display:flex;flex-direction:column;gap:11px;}
.auth-feat{display:flex;align-items:center;gap:10px;font-size:.79rem;color:var(--t2);}
.auth-fi{width:27px;height:27px;border-radius:8px;background:var(--adim);display:flex;align-items:center;justify-content:center;font-size:.78rem;flex-shrink:0;}
.auth-r{width:440px;flex-shrink:0;display:flex;align-items:center;justify-content:center;padding:36px 44px;}
.auth-card{width:100%;max-width:340px;}
.auth-tabs{display:flex;background:var(--card);border:1px solid var(--border);border-radius:var(--r3);padding:3px;margin-bottom:20px;gap:3px;}
.atab{flex:1;padding:8px 12px;border-radius:9px;border:none;background:none;color:var(--t2);font-family:inherit;font-size:.81rem;cursor:pointer;transition:all .15s;font-weight:500;}
.atab.on{background:var(--accent);color:#fff;font-weight:600;}
.auth-h{font-size:1.07rem;font-weight:700;letter-spacing:-.02em;margin-bottom:3px;}
.auth-st{font-size:.77rem;color:var(--t2);margin-bottom:18px;}
.demo-box{background:rgba(79,126,247,.07);border:1px solid rgba(79,126,247,.14);border-radius:var(--r2);padding:9px 13px;font-size:.73rem;color:var(--t2);margin-bottom:16px;line-height:1.6;}
.demo-box strong{color:var(--accent);}
.errbox{background:var(--rdim);border:1px solid rgba(239,68,68,.2);border-radius:var(--r2);padding:8px 12px;font-size:.77rem;color:var(--red);margin-bottom:13px;display:none;}
.auth-div{display:flex;align-items:center;gap:9px;color:var(--t3);font-size:.73rem;margin:12px 0;}
.auth-div::before,.auth-div::after{content:'';flex:1;height:1px;background:var(--border);}
.auth-foot{font-size:.7rem;color:var(--t3);text-align:center;margin-top:12px;line-height:1.6;}
.auth-foot a{color:var(--t2);cursor:pointer;}
@media(max-width:840px){.auth-l{display:none;}.auth-r{width:100%;padding:26px 18px;}}