:root{color-scheme:dark;--bg:#050a0e;--panel:#091219;--ink:#eef5f6;--muted:#82939b;--line:#1b2a31;--accent:#d8ff45;--cyan:#43d4dc}*{box-sizing:border-box}html{min-width:320px}body{margin:0;min-height:100vh;background:var(--bg);color:var(--ink);font:14px/1.6 "Microsoft YaHei UI","PingFang SC",system-ui,sans-serif}.login-shell{min-height:100vh;display:grid;grid-template-columns:minmax(0,1.08fr) minmax(420px,.92fr);position:relative}.back-link{position:absolute;z-index:3;top:28px;right:36px;color:#a9b7bc;text-decoration:none;font-size:13px;transition:.2s}.back-link:hover{color:var(--accent)}.brand-panel{position:relative;overflow:hidden;display:flex;flex-direction:column;justify-content:space-between;padding:38px clamp(36px,6vw,92px);background:radial-gradient(circle at 20% 80%,#1e4140 0,transparent 34%),linear-gradient(145deg,#0a161d,#061016 60%,#111b16)}.brand-panel:before{content:"";position:absolute;width:530px;height:530px;border:1px solid #83a97124;border-radius:50%;right:-170px;top:50%;transform:translateY(-50%);box-shadow:0 0 0 70px #83a9710b,0 0 0 140px #83a97108}.brand-panel:after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,#ffffff07 1px,transparent 1px),linear-gradient(#ffffff07 1px,transparent 1px);background-size:56px 56px;mask-image:linear-gradient(to bottom,transparent,#000 35%,#000 80%,transparent);pointer-events:none}.brand{position:relative;z-index:1;display:flex;align-items:center;gap:12px;color:#eef6f4;text-decoration:none;font-weight:700;font-size:18px;letter-spacing:2px}.brand-mark{width:38px;height:38px;display:grid;place-items:center;border:1px solid #b2d54f;border-radius:11px;color:var(--accent);font-size:17px;box-shadow:inset 0 0 20px #ccff2d18}.brand-copy{position:relative;z-index:1;max-width:620px}.eyebrow{margin:0 0 16px;color:var(--accent);font:11px/1.4 Consolas,monospace;letter-spacing:3px}.brand-copy h1{margin:0;font-size:clamp(44px,6vw,82px);line-height:1.06;letter-spacing:-4px;font-weight:750}.brand-copy h1 em{color:var(--accent);font-style:normal}.brand-copy>p:last-child{max-width:500px;margin:28px 0 0;color:#9dafb4;font-size:16px}.signal-line{position:relative;z-index:1;display:flex;gap:28px;color:#84979e;font:11px Consolas,monospace;letter-spacing:1px}.signal-line span:before{content:"";display:inline-block;width:5px;height:5px;margin:0 9px 2px 0;border-radius:50%;background:var(--accent);box-shadow:0 0 9px var(--accent)}.form-panel{display:grid;place-items:center;padding:90px clamp(28px,6vw,82px) 48px;background:linear-gradient(160deg,#0b1419,#050a0e 70%)}.form-wrap{width:min(430px,100%)}.form-wrap h2{margin:0;font-size:32px;letter-spacing:-1px}.intro{color:var(--muted);margin:10px 0 34px}label{display:block;margin:18px 0 7px;color:#acbac0;font-size:13px}input{display:block;width:100%;height:50px;padding:0 15px;border:1px solid #27363c;border-radius:8px;background:#081117;color:#f0f7f8;outline:none;font:inherit;transition:.2s}input::placeholder{color:#53636a}input:focus{border-color:#769235;box-shadow:0 0 0 3px #c9ff3212;background:#0a151b}button{width:100%;height:51px;display:flex;align-items:center;justify-content:space-between;margin-top:26px;padding:0 18px;border:1px solid #ddff63;border-radius:8px;background:var(--accent);color:#11170a;font:700 14px inherit;cursor:pointer;transition:.2s}button:hover{background:#e5ff7d;transform:translateY(-1px);box-shadow:0 10px 30px #cfff2630}button:disabled{opacity:.5;transform:none}#error{color:#ff7182;min-height:23px;margin:10px 0 0}.security-note{margin:24px 0 0;padding-top:20px;border-top:1px solid var(--line);color:#62747c;font-size:12px}.security-note span{color:#76a72e;margin-right:7px}@media(max-width:860px){.login-shell{grid-template-columns:1fr}.brand-panel{min-height:300px;padding:28px 28px 42px}.brand-copy{margin-top:80px}.brand-copy h1{font-size:48px;letter-spacing:-2px}.brand-copy>p:last-child{margin-top:18px}.signal-line{display:none}.form-panel{padding:58px 24px}.back-link{top:29px;right:24px}}@media(max-width:480px){.brand-panel{min-height:250px}.brand-copy{margin-top:58px}.brand-copy h1{font-size:38px}.brand-copy>p:last-child{font-size:14px}.form-panel{padding:44px 20px}.form-wrap h2{font-size:27px}}
@media(max-width:420px){.brand{font-size:15px;letter-spacing:1px}.brand-panel{padding-inline:20px}.form-panel{padding-inline:18px}}