:root{color-scheme:light dark;--page:#f5f8fc;--surface:#fff;--subtle:#f7f9fc;--text:#14233a;--muted:#66758b;--line:#dce5f0;--blue:#2762e9;--blue-dark:#174fc7;--blue-soft:#edf4ff;--green:#14785b;--danger:#aa3b2e;--shadow:rgba(24,47,79,.12)}
*{box-sizing:border-box}html,body{margin:0;min-height:100%;background:var(--page);color:var(--text);font-family:"Microsoft YaHei UI","Segoe UI",sans-serif}button,input{font:inherit}.hidden{display:none!important}.viewer-shell{width:min(1080px,calc(100% - 32px));min-height:calc(100vh - 32px);margin:16px auto;overflow:hidden;background:var(--surface);border:1px solid var(--line);border-radius:16px;box-shadow:0 18px 48px var(--shadow)}
.topbar{min-height:58px;padding:0 20px;display:flex;align-items:center;gap:12px;background:var(--surface);border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:8px;color:inherit;text-decoration:none}.brand-mark{width:30px;height:30px;display:grid;place-items:center;margin-right:4px;color:#fff;background:linear-gradient(145deg,#1748a5,#2c70ee 65%,#20c79b 66%);border-radius:9px;font-weight:700}.brand b{font-weight:600}.brand>span:last-child{color:#7a889d;font-size:13px}.readonly{margin-left:auto;display:inline-flex;align-items:center;gap:6px;color:var(--green);font-size:12px}.readonly svg,.copy-button svg{width:16px;height:16px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.entry{min-height:calc(100vh - 91px);padding:36px 18px;display:grid;place-items:center;background:var(--page)}.entry-panel{width:min(520px,100%);padding:34px;background:var(--surface);border:1px solid var(--line);border-radius:14px}.entry-key{width:42px;height:42px;display:grid;place-items:center;margin-bottom:20px;color:var(--blue);background:var(--blue-soft);border-radius:10px;font-size:24px}.entry h1{margin:0;font-size:28px}.entry p{margin:10px 0 0;color:var(--muted);line-height:1.65}.entry form{margin-top:24px}.entry label{display:block;margin-bottom:7px;color:var(--muted);font-size:12px}.entry-row{display:flex;gap:9px}.entry-row input{min-width:0;flex:1;height:46px;padding:0 13px;color:var(--text);background:var(--subtle);border:1px solid var(--line);border-radius:9px;outline:0;text-transform:uppercase}.entry-row input:focus{border-color:var(--blue);box-shadow:0 0 0 3px rgba(39,98,233,.13)}.entry-row button{min-height:46px;padding:0 18px;color:#fff;background:var(--blue);border:0;border-radius:9px;cursor:pointer}.error{min-height:20px;margin-top:8px;color:var(--danger);font-size:12px}
.mailbox-summary{padding:22px 24px 20px;display:flex;align-items:flex-start;gap:18px;background:var(--surface)}.summary-main{min-width:0}.eyebrow{margin-bottom:6px;color:var(--muted);font-size:12px}.mailbox-summary h1{margin:0;overflow-wrap:anywhere;font-size:20px;font-weight:600}.summary-meta{margin-top:8px;color:var(--muted);font-size:12px}.mail-count{margin-left:auto;flex:0 0 auto;padding:7px 11px;color:#2459bb;background:#edf3ff;border-radius:999px;font-size:12px}.lifecycle{margin:0 24px 16px;padding:10px 13px;display:flex;align-items:center;gap:14px;color:#7c571d;background:#fff7e9;border:1px solid #eed9b5;border-radius:9px;font-size:12px}.lifecycle span{margin-left:7px;color:#8a7658}.lifecycle time{margin-left:auto;font-weight:600;font-variant-numeric:tabular-nums}
.mail-layout{display:grid;grid-template-columns:minmax(225px,.8fr) minmax(360px,1.55fr);min-height:430px;border-top:1px solid var(--line)}.mail-list{padding:14px 12px 18px;background:var(--subtle);border-right:1px solid var(--line)}.list-toolbar{min-height:34px;padding:0 6px 8px 10px;display:flex;align-items:center;gap:8px}.list-label{color:var(--muted);font-size:12px}.refresh-button{margin-left:auto;padding:6px 9px;color:var(--blue-dark);background:var(--blue-soft);border:1px solid #d7e4fb;border-radius:7px;font-size:11px;cursor:pointer}.refresh-button:hover{border-color:#a9c3f5}.refresh-button:disabled{opacity:.6;cursor:wait}.message{width:100%;padding:14px;display:block;color:inherit;background:transparent;border:1px solid transparent;border-radius:11px;text-align:left;cursor:pointer}.message+.message{margin-top:5px}.message:hover{background:rgba(39,98,233,.05)}.message.active{background:var(--surface);border-color:#c9d8eb}.message-head{display:flex;align-items:center;gap:8px}.message-sender{min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-weight:600}.message time{margin-left:auto;flex:0 0 auto;color:#7a889d;font-size:11px}.message-subject{display:block;margin-top:9px;font-weight:500}.message-preview{display:block;margin-top:5px;overflow:hidden;color:#718096;font-size:12px;text-overflow:ellipsis;white-space:nowrap}.none{padding:34px 12px;color:var(--muted);text-align:center;font-size:13px}
.mail-detail{min-width:0;padding:24px;background:var(--surface)}.empty{min-height:320px;display:grid;place-content:center;justify-items:center;gap:10px;color:var(--muted)}.empty span{font-size:28px}.mail-detail h2{margin:0;font-size:20px;font-weight:600}.detail-meta{margin-top:7px;overflow-wrap:anywhere;color:var(--muted);font-size:12px}.otp-panel{margin-top:20px;padding:16px 18px;display:flex;align-items:center;gap:16px;background:var(--blue-soft);border-left:3px solid #2c6bea;border-radius:10px}.otp-copy{min-width:0}.otp-label{color:#4f6380;font-size:12px}.otp-code{margin-top:3px;color:var(--blue-dark);font-size:28px;font-weight:600;letter-spacing:.16em}.copy-button{margin-left:auto;min-height:40px;padding:0 16px;display:inline-flex;align-items:center;gap:7px;color:#fff;background:var(--blue);border:0;border-radius:8px;cursor:pointer}.copy-button:hover{background:var(--blue-dark)}.copy-status{min-height:20px;margin-top:9px;color:var(--green);font-size:12px}.body-label{margin-top:24px;color:var(--muted);font-size:12px}.mail-body{min-height:150px;margin:9px 0 0;padding:18px;overflow-wrap:anywhere;color:#24344b;background:#f8fafc;border:1px solid var(--line);border-radius:11px;font:14px/1.6 Consolas,"Microsoft YaHei UI",monospace;white-space:pre-wrap}.toast{position:fixed;right:20px;bottom:20px;padding:11px 15px;color:#fff;background:#17243a;border-radius:8px;opacity:0;transform:translateY(8px);transition:.2s}.toast.show{opacity:1;transform:none}
@media(prefers-color-scheme:dark){:root{--page:#0f1621;--surface:#171f2b;--subtle:#121a25;--text:#e8eef8;--muted:#9caabe;--line:#2d3849;--blue-soft:#1a2942;--green:#6dd2af;--shadow:rgba(0,0,0,.3)}.mail-count{color:#a9c7ff;background:#1c2b47}.message.active{border-color:#395273}.otp-label{color:#a9bad1}.otp-code{color:#89b1ff}.mail-body{color:#dbe5f3;background:#111923}.lifecycle{color:#e1bc78;background:#2b2418;border-color:#5f4a28}.lifecycle span{color:#bba783}}
@media(max-width:660px){.viewer-shell{width:100%;min-height:100vh;margin:0;border:0;border-radius:0}.topbar{padding:0 14px}.brand>span:last-child{display:none}.mailbox-summary{padding:18px 16px}.mailbox-summary h1{font-size:17px}.mail-count{display:none}.lifecycle{margin:0 14px 14px;align-items:flex-start}.lifecycle time{display:none}.mail-layout{display:block;min-height:0}.mail-list{padding:14px;border-right:0;border-bottom:1px solid var(--line)}.mail-detail{padding:20px 16px}.otp-panel{align-items:stretch;flex-wrap:wrap}.copy-button{min-height:44px}.entry-panel{padding:28px 20px}.entry-row{flex-direction:column}}