:root{--bg:#fafafa;--text:#0a0a0a;--text-secondary:#64748b;--text-tertiary:#94a3b8;--border:rgba(0,0,0,0.08);--border-light:rgba(0,0,0,0.06);--card-bg:rgba(255,255,255,0.7);--card-bg-solid:#fff;--header-bg:rgba(250,250,250,0.6);--blur:18px;--shadow:0 8px 32px rgba(0,0,0,0.04);--p:#0a0a0a;--s:#22c55e;--d:#ef4444;--i:#3b82f6;--w:#f97316;--r:14px;--rl:18px;--rx:22px;--f:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI','PingFang SC','Microsoft YaHei',sans-serif;--tsl:0.3s cubic-bezier(0.2,0,0,1);--tn:0.2s cubic-bezier(0.2,0,0,1)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:var(--f);background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased;font-size:14px;line-height:1.5;min-height:100vh;background-image:linear-gradient(rgba(0,0,0,0.03) 1px,transparent 1px),linear-gradient(90deg,rgba(0,0,0,0.03) 1px,transparent 1px);background-size:36px 36px}.container{max-width:480px;margin:0 auto;padding:40px 20px}.card{background:var(--card-bg);backdrop-filter:blur(var(--blur));-webkit-backdrop-filter:blur(var(--blur));border-radius:var(--rl);border:1px solid var(--border);padding:28px 24px;margin-bottom:16px;box-shadow:var(--shadow)}.card-header{text-align:center;margin-bottom:24px}.card-header .logo{width:52px;height:52px;border-radius:var(--r);margin:0 auto 16px;display:flex;align-items:center;justify-content:center;background:var(--p);color:#fff;font-size:24px;font-weight:700}.card-header h2{font-size:20px;font-weight:700;color:var(--text);margin-bottom:6px;letter-spacing:-0.3px}.card-header p{font-size:13px;color:var(--text-secondary)}.form-group{margin-bottom:16px}.form-group label{display:block;font-size:13px;font-weight:600;color:var(--text);margin-bottom:6px}.form-group label small{font-weight:400;color:var(--text-secondary);margin-left:4px}.form-group input,.form-group select{width:100%;padding:10px 14px;border:1px solid var(--border);border-radius:var(--r);font-size:14px;font-family:var(--f);color:var(--text);background:var(--card-bg-solid);transition:all var(--tn);outline:none}.form-group input:focus,.form-group select:focus{border-color:var(--p);box-shadow:0 0 0 3px rgba(0,0,0,0.06)}.form-group input.error{border-color:var(--d)}.form-row{display:flex;gap:12px}.form-row .form-group{flex:1}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;width:100%;padding:12px 20px;font-size:14px;font-weight:600;border-radius:var(--r);cursor:pointer;transition:all var(--tn);border:none;font-family:var(--f);text-decoration:none}.btn-primary{background:var(--p);color:#fff}.btn-primary:hover{opacity:0.9;transform:translateY(-1px)}.btn-outline{background:transparent;color:var(--text);border:1px solid var(--border)}.btn-outline:hover{background:rgba(0,0,0,0.03)}.btn-sm{padding:8px 16px;font-size:12px;width:auto}.btn:disabled{opacity:0.5;cursor:not-allowed;pointer-events:none}.alert{padding:12px 16px;border-radius:var(--r);font-size:13px;margin-bottom:16px;display:flex;align-items:flex-start;gap:10px;line-height:1.5}.alert i{flex-shrink:0;margin-top:2px}.alert-error{background:rgba(239,68,68,0.08);color:var(--d);border:1px solid rgba(239,68,68,0.2)}.alert-success{background:rgba(34,197,94,0.08);color:var(--s);border:1px solid rgba(34,197,94,0.2)}.alert-info{background:rgba(59,130,246,0.08);color:var(--i);border:1px solid rgba(59,130,246,0.2)}.alert-warning{background:rgba(249,115,22,0.08);color:var(--w);border:1px solid rgba(249,115,22,0.2)}.steps{display:flex;justify-content:center;gap:8px;margin-bottom:28px}.step-dot{width:10px;height:10px;border-radius:50%;background:var(--border);transition:all var(--tn)}.step-dot.active{background:var(--p);transform:scale(1.3)}.step-dot.done{background:var(--s)}.help-link{display:inline-flex;align-items:center;gap:4px;font-size:12px;color:var(--text-secondary);text-decoration:none;margin-top:8px;transition:color var(--tn)}.help-link:hover{color:var(--p)}.text-center{text-align:center}.text-sm{font-size:12px;color:var(--text-secondary)}.mt-16{margin-top:16px}.mt-24{margin-top:24px}.mb-16{margin-bottom:16px}.mb-24{margin-bottom:24px}.flex-center{display:flex;align-items:center;justify-content:center}.gap-8{gap:8px}.gap-12{gap:12px}.badge{display:inline-flex;align-items:center;gap:4px;padding:4px 10px;border-radius:20px;font-size:11px;font-weight:600}.badge-green{background:rgba(34,197,94,0.12);color:#16a34a}.badge-red{background:rgba(239,68,68,0.12);color:#dc2626}.spinner{display:inline-block;width:16px;height:16px;border:2px solid var(--border);border-top-color:var(--p);border-radius:50%;animation:spin 0.6s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}@keyframes fadeIn{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}.fade-in{animation:fadeIn 0.3s ease forwards}@media(max-width:480px){.container{padding:20px 16px}.card{padding:22px 18px}.form-row{flex-direction:column;gap:0}}