.lf-root{--ease:cubic-bezier(.22, 1, .36, 1);--ink:#0a0a0a;--soft:#737373;--mute:#9ca3af;--line:#e8e8e8;--paper:#fff;--mono:ui-monospace, "SF Mono", "Cascadia Mono", "Consolas", "Menlo", monospace;background:var(--paper);min-height:100vh;color:var(--ink);-webkit-font-smoothing:antialiased;flex-direction:column;font-family:MiSans VF,MiSans,PingFang SC,Microsoft YaHei,system-ui,sans-serif;display:flex}.lf-top{z-index:30;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-bottom:1px solid var(--line);background:#ffffffdb;position:sticky;top:0}.lf-top-inner{justify-content:space-between;align-items:center;max-width:960px;margin:0 auto;padding:14px 24px;display:flex}.lf-brand{color:var(--ink);align-items:center;gap:10px;text-decoration:none;display:flex}.lf-brand img{width:28px;height:28px;display:block}.lf-brand b{letter-spacing:.02em;font-size:15px;font-weight:700}.lf-brand span{color:var(--mute);font-size:11px;font-family:var(--mono);letter-spacing:.08em}.lf-main{flex-direction:column;flex:1;justify-content:center;align-items:center;padding:48px 20px 64px;display:flex}.lf-card{border:1px solid var(--line);width:100%;max-width:440px;transition:border-color .3s var(--ease);background:#fff;border-radius:16px;padding:40px 38px 34px}.lf-card:hover{border-color:#d9d9d9}.lf-kicker{font-family:var(--mono);letter-spacing:.16em;color:var(--mute);margin:0 0 14px;font-size:11px}.lf-title{letter-spacing:-.6px;margin:0;font-size:28px;font-weight:700;line-height:1.15}.lf-sub{color:var(--soft);margin:8px 0 0;font-size:14px;line-height:1.6}.lf-tabs{border-bottom:1px solid var(--line);margin:30px 0 24px;display:flex}.lf-tab{color:var(--mute);cursor:pointer;transition:color .3s var(--ease);background:0 0;border:none;flex:1;padding:0 0 12px;font-family:inherit;font-size:14px;font-weight:500;position:relative}.lf-tab:hover{color:var(--soft)}.lf-tab--active{color:var(--ink);font-weight:600}.lf-tab--active:after{content:"";background:var(--ink);border-radius:2px;width:26px;height:2px;position:absolute;bottom:-1px;left:50%;transform:translate(-50%)}.lf-msg{border-radius:10px;margin:0 0 16px;padding:10px 14px;font-size:13px;line-height:1.5}.lf-msg--err{color:#b91c1c;background:#fef2f2;border:1px solid #fecaca}.lf-msg--ok{color:#15803d;background:#f0fdf4;border:1px solid #bbf7d0}.lf-form{flex-direction:column;gap:18px;display:flex}.lf-field label{color:var(--soft);margin-bottom:8px;font-size:13px;display:block}.lf-field-head{justify-content:space-between;align-items:center;margin-bottom:8px;display:flex}.lf-field-head label{margin-bottom:0}.lf-input-wrap{position:relative}.lf-input{width:100%;color:var(--ink);border:1px solid var(--line);transition:border-color .3s var(--ease), background .3s var(--ease);background:#fafaf8;border-radius:10px;outline:none;padding:11px 14px;font-family:inherit;font-size:14px}.lf-input::placeholder{color:var(--mute)}.lf-input:focus{border-color:var(--ink);background:#fff}.lf-input--code{letter-spacing:.3em;font-family:var(--mono)}.lf-input-row{gap:10px;display:flex}.lf-btn{border:1px solid var(--ink);background:var(--ink);color:#fff;cursor:pointer;transition:opacity .3s var(--ease), transform .3s var(--ease);border-radius:10px;justify-content:center;align-items:center;gap:8px;padding:12px 16px;font-family:inherit;font-size:14px;font-weight:600;display:inline-flex}.lf-btn:hover{opacity:.88;transform:translateY(-1px)}.lf-btn:disabled{opacity:.45;cursor:not-allowed;transform:none}.lf-btn--outline{color:var(--ink);border-color:var(--line);white-space:nowrap;background:0 0;min-width:108px;padding:11px 14px;font-size:13px}.lf-btn--outline:hover{border-color:var(--ink);background:#fafaf8}.lf-btn--ghost{color:var(--ink);background:0 0}.lf-btn--qq{color:var(--ink);border-color:var(--line);background:0 0}.lf-btn--qq:hover{color:#0e9fd8;background:#f0fbff;border-color:#12b7f5}.lf-forgot{color:var(--mute);cursor:pointer;transition:color .3s var(--ease);background:0 0;border:none;align-items:center;gap:4px;padding:2px;font-family:inherit;font-size:12px;display:inline-flex}.lf-forgot:hover{color:var(--ink)}.lf-qq{text-align:center;padding:10px 0 2px}.lf-qq-icon{border:1px solid var(--line);color:#12b7f5;background:#fafaf8;border-radius:50%;justify-content:center;align-items:center;width:56px;height:56px;margin:0 auto 16px;display:flex}.lf-qq-title{margin:0 0 6px;font-size:16px;font-weight:600}.lf-qq-desc{color:var(--mute);margin:0 0 22px;font-size:13px}.lf-qq-note{color:var(--mute);margin:14px 0 0;font-size:12px}.lf-back{color:var(--soft);transition:color .3s var(--ease);align-items:center;gap:6px;margin-top:26px;font-size:13px;text-decoration:none;display:inline-flex}.lf-back:hover{color:var(--ink)}.lf-foot{border-top:1px solid var(--line);text-align:center;color:var(--mute);padding:24px;font-size:12px}.lf-foot p{margin:0}@media (max-width:560px){.lf-card{padding:28px 22px 24px}.lf-brand span{display:none}}