:root{--primary:#2563eb;--primary-dark:#1d4ed8;--ink:#0f172a;--muted:#64748b;--line:#e2e8f0;--card:#fff;--danger:#b91c1c;--success:#047857;--warning:#b45309}*{box-sizing:border-box}html,body{margin:0;min-height:100%;font-family:Inter,"PingFang SC","Microsoft YaHei",Arial,sans-serif;color:var(--ink);background:#f8fafc}.login-shell{min-height:100vh;display:grid;grid-template-columns:minmax(420px,1.05fr) minmax(420px,.95fr)}.login-brand-panel{position:relative;overflow:hidden;padding:44px 64px;display:flex;flex-direction:column;justify-content:space-between;color:#fff;background:radial-gradient(circle at 20% 10%,rgba(96,165,250,.44),transparent 31%),radial-gradient(circle at 90% 86%,rgba(14,165,233,.28),transparent 32%),linear-gradient(145deg,#0f172a,#172554 56%,#1e3a8a)}.login-brand-panel:after{content:"";position:absolute;width:420px;height:420px;border:1px solid rgba(255,255,255,.12);border-radius:50%;right:-170px;top:18%;box-shadow:0 0 0 70px rgba(255,255,255,.03),0 0 0 140px rgba(255,255,255,.025)}.brand-top,.mobile-brand{display:flex;align-items:center;gap:12px;font-weight:800;letter-spacing:.08em}.brand-mark{width:38px;height:38px;border-radius:11px;display:inline-grid;place-items:center;background:#fff;color:#1d4ed8;font-weight:900;box-shadow:0 8px 24px rgba(0,0,0,.14)}.brand-copy{position:relative;z-index:1;max-width:680px}.eyebrow{font-size:12px;letter-spacing:.18em;color:#bfdbfe}.brand-copy h1{font-size:clamp(38px,4vw,62px);line-height:1.16;margin:22px 0 20px;letter-spacing:-.035em}.brand-copy p{font-size:18px;line-height:1.85;color:#dbeafe;max-width:620px}.brand-footer{font-size:13px;color:#bfdbfe;letter-spacing:.08em}.login-form-panel{display:grid;place-items:center;padding:40px;background:linear-gradient(180deg,#fff,#f8fafc)}.login-card{width:min(440px,100%)}.mobile-brand{display:none;color:#1e3a8a;margin-bottom:36px}.login-heading h2{font-size:34px;margin:0 0 10px;letter-spacing:-.03em}.login-heading p{margin:0 0 32px;color:var(--muted)}.field{display:block;margin-bottom:20px}.field>span:first-child{display:block;margin-bottom:8px;font-size:14px;font-weight:700;color:#334155}.field input{width:100%;height:48px;border:1px solid var(--line);border-radius:10px;padding:0 14px;font-size:15px;outline:none;background:#fff;transition:.18s}.field input:focus{border-color:#60a5fa;box-shadow:0 0 0 4px rgba(37,99,235,.11)}.password-wrap{position:relative;display:block}.password-wrap input{padding-right:64px}.password-toggle{position:absolute;right:8px;top:8px;height:32px;border:0;background:#eff6ff;color:#1d4ed8;border-radius:7px;padding:0 10px;cursor:pointer}.login-button{width:100%;height:50px;border:0;border-radius:10px;background:linear-gradient(135deg,var(--primary),var(--primary-dark));color:#fff;font-size:16px;font-weight:800;cursor:pointer;box-shadow:0 12px 28px rgba(37,99,235,.24);transition:.18s}.login-button:hover{transform:translateY(-1px)}.login-button:disabled{opacity:.68;cursor:wait;transform:none}.login-notice{margin-top:24px;padding-top:20px;border-top:1px solid var(--line);font-size:13px;line-height:1.7;color:var(--muted)}.alert{padding:12px 14px;border-radius:9px;margin:0 0 20px;font-size:14px}.alert.error{background:#fef2f2;color:var(--danger);border:1px solid #fecaca}.alert.success{background:#ecfdf5;color:var(--success);border:1px solid #a7f3d0}.alert.warning{background:#fffbeb;color:var(--warning);border:1px solid #fde68a}.caps-hint{margin:-10px 0 14px;color:var(--warning);font-size:13px}@media(max-width:900px){.login-shell{grid-template-columns:1fr}.login-brand-panel{display:none}.login-form-panel{min-height:100vh;padding:24px}.mobile-brand{display:flex}.login-card{max-width:460px}}