:root{--purple:#c3a4ed;--purple2:#e9def8;--blue:#cceafb;--ink:#322b43;--muted:#756d82;--line:#e7dfef}*{box-sizing:border-box}body{margin:0;min-height:100vh;background:linear-gradient(140deg,#f7f2fc,#f5fbff);color:var(--ink);font:14px/1.65 system-ui,"Microsoft YaHei",sans-serif}.login-shell{min-height:calc(100vh - 50px);display:grid;grid-template-columns:minmax(340px,1fr) minmax(360px,520px);gap:28px;align-items:stretch;padding:5vw 7vw}.brand-card,.login-card{border:1px solid #ffffffaa;border-radius:26px;box-shadow:0 24px 60px #624b7c16}.brand-card{padding:64px;background:linear-gradient(145deg,#cfb4f3,#cdeafa);position:relative;overflow:hidden}.brand-card:after{content:"";position:absolute;width:340px;height:340px;border-radius:50%;right:-120px;bottom:-140px;background:#fff5}.brand-card img{width:90px;height:68px;object-fit:contain}.brand-card>span{display:block;margin-top:26px;font-size:12px;letter-spacing:.2em}.brand-card h1{font-size:clamp(38px,5vw,68px);line-height:1.08;margin:16px 0 24px}.brand-card p{max-width:640px;font-size:17px}.brand-card ol{display:grid;grid-template-columns:repeat(2,minmax(180px,1fr));gap:12px;padding:0;list-style:none;margin-top:38px}.brand-card li{background:#ffffff82;border:1px solid #fff8;border-radius:12px;padding:12px 16px}.login-card{align-self:center;background:#fff;padding:36px}.switcher{display:grid;grid-template-columns:1fr 1fr;background:#f6f2fa;padding:5px;border-radius:12px}.switcher button{border:0;background:transparent;border-radius:9px;padding:11px;color:var(--muted);cursor:pointer}.switcher button.active{background:var(--purple);color:var(--ink);box-shadow:0 4px 12px #8c6aad25}.intro{margin:32px 0 24px}.intro h2{font-size:25px;margin:0}.intro p,.privacy,small{color:var(--muted)}form{display:grid;gap:16px}label{display:grid;gap:6px;font-weight:600}input{width:100%;border:1px solid var(--line);border-radius:10px;padding:12px;background:#fcfbfd;font:inherit;color:var(--ink)}button{font:inherit}.primary,details button{border:0;border-radius:10px;background:var(--purple);padding:12px;cursor:pointer;font-weight:700}.primary:hover,details button:hover{filter:brightness(.97)}details{margin-top:22px;border-top:1px solid var(--line);padding-top:18px}summary{cursor:pointer;font-weight:700;margin-bottom:14px}details form{margin:14px 0}.hidden{display:none}.privacy{font-size:12px;margin-top:22px;background:#eef8fe;padding:10px;border-radius:9px}#toast{position:fixed;top:20px;left:50%;transform:translate(-50%,-90px);background:#3e3153;color:#fff;padding:10px 18px;border-radius:9px;transition:.2s;z-index:5}#toast.show{transform:translate(-50%,0)}footer{text-align:center;color:var(--muted);height:50px}@media(max-width:850px){.login-shell{grid-template-columns:1fr;padding:18px}.brand-card{padding:32px}.brand-card h1{font-size:38px}.brand-card ol{grid-template-columns:1fr}.login-card{width:100%}}