:root{--primary:#149187;--primary-dark:#0e6a61;--primary-light:#5cb8ab;--primary-soft:#e3f3f0;--ink:#1c1c1c;--muted:#5b6770;--placeholder:#8892a0;--border:#e5e7eb;--bg:#f8fafb;--white:#fff;--error:#d64545;--font:"Noto Sans SC","Source Sans 3",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}*{margin:0;padding:0;box-sizing:border-box}body,html{height:100%;width:100%}body{font-family:var(--font);background:var(--bg);color:var(--ink);-webkit-font-smoothing:antialiased}.login-split{display:flex;min-height:100vh;width:100%}.brand-side{position:relative;flex:1 1 50%;min-width:420px;background:linear-gradient(135deg,#0b1e1c,#113833 60%,#16544b);color:#fff;display:flex;flex-direction:column;justify-content:space-between;padding:48px 56px;overflow:hidden}.brand-side:after,.brand-side:before{content:"";position:absolute;border-radius:50%;border:1px solid hsla(0,0%,100%,.08);pointer-events:none}.brand-side:before{width:520px;height:520px;right:-180px;top:-120px}.brand-side:after{width:720px;height:720px;right:-240px;bottom:-240px;border-color:hsla(0,0%,100%,.05)}.brand-header{position:relative;z-index:1;gap:14px}.brand-header,.brand-logo{display:flex;align-items:center}.brand-logo{width:46px;height:46px;border-radius:10px;background:#fff;justify-content:center;flex-shrink:0;overflow:hidden;padding:3px}.brand-logo img{width:100%;height:100%;-o-object-fit:contain;object-fit:contain;display:block}.brand-name{line-height:1.2}.brand-name .cn{font-size:18px;font-weight:700;letter-spacing:.5px}.brand-name .en{font-size:11px;font-weight:600;opacity:.65;text-transform:uppercase;letter-spacing:1px;margin-top:2px}.brand-body{position:relative;z-index:1;max-width:460px;margin-top:40px;margin-bottom:40px}.brand-headline{font-size:34px;font-weight:700;line-height:1.35;margin-bottom:36px;letter-spacing:-.01em}.brand-point{display:flex;align-items:flex-start;gap:12px;margin-bottom:20px;font-size:15px;line-height:1.6;opacity:.92}.brand-point .bar{width:3px;height:16px;border-radius:2px;background:var(--primary-light);margin-top:4px;flex-shrink:0}.brand-point strong{font-weight:600;margin-right:8px}.brand-tags{position:relative;z-index:1;display:flex;flex-wrap:wrap;gap:10px}.brand-tag{padding:8px 14px;border-radius:100px;background:hsla(0,0%,100%,.08);border:1px solid hsla(0,0%,100%,.12);font-size:13px;opacity:.92}.brand-footer{position:relative;z-index:1;font-size:12px;opacity:.5;margin-top:48px}.form-side{flex:1 1 50%;min-width:420px;display:flex;align-items:center;justify-content:center;padding:48px 60px}.form-card{width:100%;max-width:420px}.eyebrow{font-size:11px;font-weight:600;letter-spacing:2px;color:var(--placeholder);text-transform:uppercase;margin-bottom:10px}.form-title{font-size:28px;font-weight:700;margin-bottom:10px;color:var(--ink)}.form-subtitle{font-size:14px;color:var(--muted);margin-bottom:28px;line-height:1.5}.role-tabs{display:flex;gap:0;background:#fff;border:1px solid var(--border);border-radius:10px;padding:4px;margin-bottom:14px}.role-tabs button{flex:1;padding:11px 16px;border:none;background:transparent;border-radius:8px;font-size:14px;font-weight:600;color:var(--muted);cursor:pointer;transition:all .2s;font-family:inherit}.role-tabs button.active{background:var(--primary-soft);color:var(--primary-dark);box-shadow:0 1px 2px rgba(20,145,135,.08)}.role-hint{font-size:13px;color:var(--placeholder);margin-bottom:24px;line-height:1.5}.form-group{margin-bottom:18px}.form-label{display:block;font-size:13px;font-weight:600;color:var(--ink);margin-bottom:8px}.input-wrap{position:relative}.input-wrap,.input-wrap .icon{display:flex;align-items:center}.input-wrap .icon{position:absolute;left:14px;color:var(--placeholder);font-size:16px;justify-content:center}.input-wrap input{width:100%;height:48px;padding:0 14px 0 42px;border:1px solid var(--border);border-radius:10px;font-size:14px;color:var(--ink);background:#fff;font-family:inherit;transition:border-color .2s,box-shadow .2s;outline:none}.input-wrap input:focus{border-color:var(--primary-light);box-shadow:0 0 0 3px rgba(20,145,135,.08)}.input-wrap input::-moz-placeholder{color:var(--placeholder)}.input-wrap input::placeholder{color:var(--placeholder)}.form-row{display:flex;align-items:center;justify-content:space-between;margin-bottom:24px}.remember{font-size:13px;color:var(--muted)}.remember,.submit-btn{display:flex;align-items:center;gap:8px;cursor:pointer}.submit-btn{width:100%;height:48px;border:none;border-radius:10px;background:var(--primary);color:#fff;font-size:15px;font-weight:600;font-family:inherit;transition:background .2s,transform .1s;justify-content:center}.submit-btn:hover{background:var(--primary-dark)}.submit-btn:active{transform:scale(.99)}.submit-btn:disabled{opacity:.6;cursor:not-allowed;transform:none}.divider{display:flex;align-items:center;gap:12px;color:var(--placeholder);font-size:13px;margin:20px 0}.divider:after,.divider:before{content:"";flex:1;height:1px;background:var(--border)}.sso-btn{width:100%;height:46px;border:1px solid var(--border);border-radius:10px;background:#fff;color:var(--primary-dark);font-size:14px;font-weight:600;cursor:pointer;font-family:inherit;transition:all .2s}.sso-btn:hover{border-color:var(--primary-light);background:var(--primary-soft)}.message{font-size:13px;margin-top:12px;min-height:18px;color:var(--error);line-height:1.5;text-align:center}.internal-panel{margin-top:24px;border-top:1px solid var(--border);padding-top:6px}.internal-toggle{display:flex;align-items:center;justify-content:center;gap:8px;width:100%;padding:14px 0;border:none;background:none;color:var(--primary);font-size:14px;font-weight:700;cursor:pointer;font-family:inherit}.internal-toggle .arrow{font-size:10px;transition:transform .2s}.internal-panel.open .arrow{transform:rotate(180deg)}.internal-body{display:none;flex-direction:column}.internal-panel.open .internal-body{display:flex}.internal-entry{width:100%;text-align:left;padding:13px 0 13px 18px;border:none;border-bottom:1px solid var(--border);background:none;color:var(--primary);font-size:14px;font-weight:600;cursor:pointer;font-family:inherit;transition:color .2s,background .2s}.internal-entry:last-child{border-bottom:none}.internal-entry:hover{color:var(--primary-dark);background:var(--primary-soft)}.form-footer{text-align:center;margin-top:24px;font-size:13px;color:var(--muted);line-height:1.8}.form-footer a{color:var(--primary-dark);font-weight:600;text-decoration:none}.form-footer a:hover{text-decoration:underline}.back-link{display:inline-flex;align-items:center;gap:4px;margin-top:6px}@media (max-width:900px){.login-split{flex-direction:column}.brand-side{min-width:0;flex:none;padding:32px 24px;min-height:280px}.brand-headline{font-size:24px}.brand-tags{display:none}.form-side{min-width:0;padding:32px 24px}}