:root{color-scheme:light;--ink:#172033;--muted:#667085;--line:#dce3ec;--accent:#3159d9;--soft:#f3f6fa}
*{box-sizing:border-box}[hidden]{display:none!important}
body{margin:0;min-height:100vh;min-height:100dvh;display:grid;place-items:center;padding:28px 18px;background:var(--soft);color:var(--ink);font-family:"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;-webkit-font-smoothing:antialiased}
.login-card{position:relative;width:min(480px,100%);min-height:480px;padding:32px 36px;border:1px solid var(--line);border-radius:16px;background:#fff;box-shadow:0 16px 48px #1720330c}
.login-heading{margin-bottom:24px;padding-right:80px}h1{margin:0;font-size:26px;line-height:1.3;letter-spacing:-.6px;font-weight:700}.login-heading p{margin:10px 0 0;color:var(--muted);font-size:14px;line-height:1.5}
button,input,a{font:inherit}button,a{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:wait;opacity:.6}button:focus-visible,a:focus-visible{outline:3px solid #91a8f2;outline-offset:4px}
.mode-switch{position:absolute;top:24px;right:24px;display:flex;align-items:center;gap:7px;min-height:48px;min-width:76px;padding:8px 10px;background:#f5f7fc;color:var(--accent);border:1px solid #e8edf8;border-radius:10px;font-size:12px;font-weight:600;transition:background .15s}
.mode-switch:hover{background:#eaf0ff}.mode-switch span[data-mode-icon]{display:flex}.mode-switch svg{width:27px;height:27px;stroke-width:1.65}
label{display:block;margin:19px 0 8px;font-size:13px;font-weight:600;color:#465166}label:first-of-type{margin-top:0}
input:not([type=hidden]){display:block;width:100%;height:48px;border:1px solid #cdd6e2;border-radius:8px;background:#fff;padding:0 13px;color:var(--ink);font-size:16px;transition:border-color .15s,box-shadow .15s}
input:focus{outline:0;border-color:var(--accent);box-shadow:0 0 0 3px #3159d91a}
.login-submit{width:100%;height:48px;margin-top:30px;border:0;border-radius:8px;background:var(--accent);color:#fff;font-size:15px;font-weight:650;transition:background .15s}.login-submit:hover{background:#264bbb}
.login-error{margin:-6px 0 22px;padding:12px 14px;border:1px solid #f4ceca;background:#fff5f3;border-radius:8px;color:#ad3027;font-size:13px;line-height:1.6;overflow-wrap:anywhere}
.qr-stage{position:relative;width:100%;min-height:220px;height:380px;overflow:hidden}#wecom-panel{width:320px;height:380px;position:absolute;left:50%;top:0;transform:translateX(-50%);transform-origin:top center}#wecom-panel iframe{display:block;border:0}
.qr-placeholder{position:absolute;inset:0;display:grid;place-items:center;padding:24px;background:#fff;color:var(--muted);font-size:14px;text-align:center;line-height:1.65}
.qr-status{margin:8px 0 0;min-height:22px;text-align:center;color:var(--muted);font-size:13px;line-height:1.6}.qr-status[data-error=true]{color:#ad3027}.scan-actions{display:flex;justify-content:center;flex-wrap:wrap;gap:4px 12px;margin-top:6px}.text-button{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:8px 4px;border:0;background:transparent;color:var(--accent);font-size:13px;text-decoration:none}.text-button:hover{text-decoration:underline}
@media(max-width:480px){body{padding:20px 16px}.login-card{padding:32px 24px 28px;min-height:440px}.login-heading{margin-bottom:26px;padding-right:78px}h1{font-size:24px}.mode-switch{top:21px;right:16px;min-width:68px;padding:7px 8px}.mode-switch svg{width:25px;height:25px}}
@media(prefers-reduced-motion:reduce){*{transition:none!important}}