:root{color-scheme:light;--navy:#262253;--ink:#292a3e;--muted:#898a9b}*{box-sizing:border-box}body{margin:0;min-height:100vh;font:14px/1.75 'Microsoft YaHei UI','Microsoft YaHei',sans-serif;color:var(--ink);background:radial-gradient(ellipse at 50% 30%,#eaeaf3,transparent 65%),#f5f6f9;-webkit-font-smoothing:antialiased}a{text-decoration:none;color:inherit}.login-header{max-width:1200px;margin:auto;padding:28px 40px;display:flex;align-items:center;justify-content:space-between;gap:20px}.brand{display:flex;align-items:center;gap:12px;font-size:13px;color:#515165}.brand img{width:36px;height:36px;object-fit:contain}.back{font-size:12px;color:#818194}.back span{margin-left:8px}.back:hover{color:var(--navy)}main{padding:40px 24px}.login-card{width:100%;max-width:470px;margin:auto;background:#fff;border:1px solid #e1e2eb;border-radius:18px;box-shadow:0 25px 65px -25px #26234d25,0 2px 5px #23233d03;overflow:hidden}.card-top{display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid #eeeeF4;padding:19px 32px;font-size:12px;color:#77778e}.tag{font:11px/1.6 'Segoe UI',sans-serif;letter-spacing:.08em;color:#77718f;background:#f4f3f9;border:1px solid #eceaf3;border-radius:5px;padding:3px 8px}.card-body{padding:32px 36px}.eyebrow{font:9px/1.5 'Segoe UI',sans-serif;letter-spacing:.18em;color:#a0a0b2;margin:0 0 13px}h1{font-size:26px;font-weight:500;letter-spacing:.02em;line-height:1.5;margin:0 0 12px}.intro{font-size:12px;color:var(--muted);margin:0 0 32px}label{display:block;font-size:12px;color:#56566d;margin-bottom:10px}.key-input{display:flex;align-items:center;gap:11px;padding:0 14px;border:1px solid #dcdde8;border-radius:8px;background:#fbfbfd;transition:box-shadow .2s,border-color .2s}.key-input svg{color:#9693ab;flex-shrink:0}.key-input:focus-within{border-color:#827ba9;box-shadow:0 0 0 3px #827ba910;background:white}input{border:0;background:transparent;width:100%;min-width:0;padding:14px 0;outline:0;font:14px/1.6 'Microsoft YaHei UI',sans-serif;color:var(--ink)}input::placeholder{color:#b0aebd;font-size:12px}button{display:flex;align-items:center;justify-content:space-between;width:100%;margin-top:24px;padding:13px 18px;border:1px solid var(--navy);border-radius:8px;background:var(--navy);color:white;font:13px/1.8 'Microsoft YaHei UI',sans-serif;cursor:pointer;box-shadow:0 5px 12px #28224e15;transition:background .2s}button span{font-size:20px;line-height:1}button:hover{background:#3c356d}button:focus-visible,a:focus-visible{outline:3px solid #aaa4ce;outline-offset:4px}.error{font-size:12px;color:#a33d42;background:#fff2f3;border:1px solid #f1dadd;padding:10px 12px;border-radius:7px;margin:12px 0 0}.help{margin-top:28px;display:flex;align-items:flex-start;gap:10px;padding-top:23px;border-top:1px solid #efeff4}.help-icon{flex-shrink:0;display:flex;align-items:center;justify-content:center;width:15px;height:15px;border:1px solid #a7a3ba;border-radius:50%;font:11px Georgia,serif;color:#918ba6;margin-top:3px}.help strong{font-size:11px;font-weight:400;color:#69677e}.help p{font-size:11px;line-height:1.9;color:#9a98a9;margin:5px 0 0}code{font:11px 'Segoe UI',sans-serif;color:#79738d;overflow-wrap:anywhere}.card-bottom{background:#fafafd;border-top:1px solid #efeff5;text-align:center;padding:16px;font-size:10px;color:#9693a7}.card-bottom span{padding:0 15px;color:#c3c0cf}footer{text-align:center;font-size:10px;color:#a5a4b2;margin:24px 0 12px}@media(min-width:1500px){main{padding-top:8vh}}@media(max-width:600px){.login-header{padding:24px 20px;gap:12px}.brand{font-size:11px;gap:9px}.brand img{width:30px;height:30px}.back{font-size:10px;white-space:nowrap}.back span{margin-left:3px}main{padding:24px 18px}.card-top{padding:16px 24px}.card-body{padding:28px 24px}h1{font-size:24px}.intro{margin-bottom:28px}.card-bottom span{padding:0 10px}}@media(prefers-reduced-motion:reduce){*{transition:none!important}}