@keyframes float{0%{transform:translateY(0)}50%{transform:translateY(-10px)}to{transform:translateY(0)}}@keyframes fadeUp{0%{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}.login-container{position:fixed;inset:0;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#fdfbf7,#f4f0ea);padding:20px;overflow:hidden;font-family:Inter,system-ui,-apple-system,sans-serif;z-index:1000}.login-container:before{top:-10%;left:-10%;width:50vw;height:50vw;background:radial-gradient(circle,rgba(51,112,255,.06) 0,rgba(255,255,255,0) 70%);animation:float 8s ease-in-out infinite}.login-container:after,.login-container:before{content:"";position:absolute;border-radius:50%;pointer-events:none}.login-container:after{bottom:-20%;right:-10%;width:60vw;height:60vw;background:radial-gradient(circle,rgba(0,200,255,.04) 0,rgba(255,255,255,0) 70%);animation:float 10s ease-in-out infinite reverse}.login-card{background:rgba(255,255,255,.85);backdrop-filter:blur(32px) saturate(180%);-webkit-backdrop-filter:blur(32px) saturate(180%);padding:56px 48px;border-radius:32px;border:1px solid #ffffff;box-shadow:0 24px 48px rgba(0,0,0,.04),0 8px 16px rgba(0,0,0,.02),inset 0 2px 4px rgba(255,255,255,.5);max-width:440px;width:100%;text-align:center;animation:fadeUp .8s cubic-bezier(.16,1,.3,1) forwards;z-index:1}.login-header h1{font-size:32px;font-weight:800;color:#1a1a1c;margin:0 0 16px;letter-spacing:-1px}.login-header p{font-size:16px;color:#6e6e73;margin:0 0 40px;line-height:1.5}.feishu-login-btn{display:flex;align-items:center;justify-content:center;gap:12px;width:100%;background:linear-gradient(135deg,#3370FF,#2E65E5);color:#ffffff;border-radius:16px;padding:18px 24px;font-size:17px;font-weight:600;text-decoration:none;transition:all .3s cubic-bezier(.16,1,.3,1);box-shadow:0 8px 24px rgba(51,112,255,.25),inset 0 1px 0 rgba(255,255,255,.2);position:relative;overflow:hidden}.feishu-login-btn:after{content:"";position:absolute;top:0;left:-100%;width:50%;height:100%;background:linear-gradient(90deg,transparent,rgba(255,255,255,.2),transparent);transition:all .5s ease}.feishu-login-btn:hover{transform:translateY(-3px);box-shadow:0 12px 32px rgba(51,112,255,.35),inset 0 1px 0 rgba(255,255,255,.2)}.feishu-login-btn:hover:after{left:200%;transition:all .8s ease}.feishu-login-btn:active{transform:translateY(0);box-shadow:0 4px 16px rgba(51,112,255,.2)}.login-error{background:#fff1f1;color:#cc2f2f;padding:16px;border-radius:12px;margin-bottom:32px;font-size:15px;font-weight:500;border:1px solid rgba(204,47,47,.1)}