:root{--bg:#f4f6f8;--surface:#fff;--ink:#18212b;--muted:#667482;--line:#dfe5ea;--soft:#eef3f6;--accent:#087f72;--accent-dark:#05665c;--blue:#2563a8;--danger:#b42318;--warning:#a15c07;--shadow:0 10px 28px rgba(25,36,48,.07);font-family:Inter,"Segoe UI","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--bg)}*{box-sizing:border-box}body{margin:0;min-height:100vh;background:var(--bg);color:var(--ink)}a{color:inherit;text-decoration:none}button,input,select{font:inherit;letter-spacing:0}.app-header{height:58px;background:#15202a;color:#eef4f7;border-bottom:1px solid #273541;position:sticky;top:0;z-index:20}.header-inner{height:100%;max-width:1440px;margin:auto;padding:0 28px;display:flex;align-items:center;justify-content:space-between}.brand{display:flex;align-items:center;gap:10px;font-weight:700}.brand-mark{width:28px;height:28px;display:grid;place-items:center;background:#20b6a4;color:#062c28;border-radius:5px;font-weight:800}.brand-mark.large{width:44px;height:44px;font-size:22px}.header-inner nav{display:flex;align-items:center;height:100%;gap:4px}.header-inner nav a,.icon-link{height:100%;padding:0 14px;display:flex;align-items:center;color:#aebbc5;background:none;border:0;cursor:pointer}.header-inner nav a:hover,.header-inner nav a.active,.icon-link:hover{color:#fff;background:#1f2e3a}.header-inner nav form{height:100%}.page{max-width:1200px;margin:0 auto;padding:28px}.page.wide{max-width:1440px}.page.reading{max-width:1000px}.page-title{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:22px}.page-title h1,.mailbox-head h1{font-size:24px;line-height:1.2;margin:3px 0 7px;letter-spacing:0}.page-title p,.section-heading p{margin:0;color:var(--muted);font-size:13px}.eyebrow{font-size:10px!important;font-weight:700;color:var(--accent)!important}.mini-stats{display:flex;border:1px solid var(--line);background:var(--surface);border-radius:6px}.mini-stats span{padding:9px 15px;color:var(--muted);font-size:11px;border-left:1px solid var(--line)}.mini-stats span:first-child{border-left:0}.mini-stats b{display:block;color:var(--ink);font-size:16px;margin-bottom:2px}.stats-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;margin-bottom:20px}.stat{background:var(--surface);border:1px solid var(--line);border-radius:6px;padding:16px 18px}.stat:hover{border-color:#aebdc8}.stat span{display:block;color:var(--muted);font-size:12px}.stat b{display:block;font-size:26px;margin-top:5px}.stat.emphasis{border-left:3px solid var(--accent)}.create-panel,.content-section,.message-card{background:var(--surface);border:1px solid var(--line);border-radius:7px;box-shadow:var(--shadow);margin-bottom:18px}.create-panel,.content-section{padding:17px}.section-heading{display:flex;justify-content:space-between;align-items:center;gap:16px;margin-bottom:14px}.section-heading h2{font-size:15px;margin:0 0 4px}.create-form{display:grid;grid-template-columns:minmax(180px,1.2fr) minmax(180px,1fr) 150px minmax(170px,1fr) auto;gap:10px;align-items:end}.create-form label,.login-box label{display:grid;gap:6px}.create-form label span,.login-box label span{font-size:11px;font-weight:600;color:#53616d}.create-form input,.create-form select,.filterbar input,.filterbar select,.login-box input{height:38px;border:1px solid #bac5ce;background:#fff;color:var(--ink);border-radius:5px;padding:0 10px;min-width:0}.create-form input:focus,.create-form select:focus,.filterbar input:focus,.filterbar select:focus,.login-box input:focus{outline:2px solid rgba(8,127,114,.17);border-color:var(--accent)}.btn{height:36px;display:inline-flex;align-items:center;justify-content:center;border:1px solid #bfc9d1;background:#fff;color:#263746;border-radius:5px;padding:0 12px;cursor:pointer;font-size:12px;white-space:nowrap}.btn:hover{background:var(--soft);border-color:#9caab5}.btn.primary{background:var(--accent);border-color:var(--accent);color:#fff;font-weight:600}.btn.primary:hover{background:var(--accent-dark)}.btn.primary-soft{background:#e8f6f4;border-color:#a9d8d2;color:#06695e}.btn.small{height:29px;padding:0 9px;font-size:11px}.btn.danger{color:var(--danger);border-color:#e5b8b4}.btn.quiet{border-color:transparent;background:transparent}.create-button{height:38px}.filterbar{display:grid;grid-template-columns:minmax(220px,1fr) 180px 150px auto auto;gap:8px;margin-bottom:14px;padding:10px;background:#f7f9fa;border:1px solid var(--line);border-radius:5px}.filterbar input,.filterbar select{height:34px}.table-scroll{overflow:auto;border:1px solid var(--line);border-radius:5px}.data-table{width:100%;border-collapse:collapse;font-size:12px}.data-table th{height:37px;background:#f5f7f8;color:#64717c;font-weight:600;text-align:left;padding:0 11px;border-bottom:1px solid var(--line);white-space:nowrap}.data-table td{padding:10px 11px;border-bottom:1px solid #e9edf0;vertical-align:middle}.data-table tr:last-child td{border-bottom:0}.data-table tbody tr:hover{background:#f8fafb}.right{text-align:right!important}.mail-address{font-family:Consolas,monospace;color:#076e65;font-weight:600}.domain-hint{font-size:10px;color:#89959f;margin-top:3px}.secondary{color:var(--muted)}.dates span{display:block;white-space:nowrap}.dates span+span{font-size:10px;margin-top:3px}.status{display:inline-flex;align-items:center;border-radius:999px;padding:3px 8px;font-size:10px;font-weight:600;border:1px solid}.status.active{background:#ecf8f1;color:#087443;border-color:#add8bd}.status.disabled,.status.expired{background:#fff5e9;color:var(--warning);border-color:#ebc99e}.count-link{color:var(--blue);font-weight:600}.row-actions{display:flex;justify-content:flex-end;gap:5px}.row-actions form{margin:0}.alert{padding:10px 12px;border-radius:5px;margin-bottom:14px;font-size:12px}.success-alert{background:#ecf8f1;border:1px solid #add8bd;color:#087443}.danger-alert{background:#fff1f0;border:1px solid #efc0bc;color:var(--danger)}.empty{min-height:150px;display:flex;flex-direction:column;align-items:center;justify-content:center;color:var(--muted);gap:6px;text-align:center}.empty b{color:#42515d}.mailbox-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:20px}.back-link{display:inline-block;color:var(--muted);font-size:12px;margin-bottom:10px}.back-link:hover{color:var(--accent)}.mailbox-meta{display:flex;align-items:center;gap:10px;color:var(--muted);font-size:12px}.inbox-section{padding:0}.inbox-section>.section-heading{padding:16px 17px 12px;margin:0;border-bottom:1px solid var(--line)}.message-list{display:grid}.message-row{display:grid;grid-template-columns:10px minmax(160px,230px) minmax(220px,1fr) 145px;gap:12px;align-items:center;padding:11px 16px;border-bottom:1px solid #e9edf0;font-size:12px}.message-row:last-child{border-bottom:0}.message-row:hover{background:#f5f9fa}.message-row.unread{background:#f0f8f7}.read-dot{width:6px;height:6px;border-radius:50%;background:#c9d1d6}.unread .read-dot{background:var(--accent)}.sender{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.subject{min-width:0}.subject b,.subject small{display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.subject b{font-size:12px}.subject small{color:var(--muted);margin-top:3px}.message-row time{color:var(--muted);font-family:Consolas,monospace;font-size:10px;text-align:right}.message-card{overflow:hidden;margin-top:12px}.message-header{padding:22px 24px;border-bottom:1px solid var(--line)}.message-header h1{font-size:21px;margin:0 0 7px}.message-header time{font-size:11px;color:var(--muted)}.message-header dl{display:grid;gap:6px;margin:18px 0 0}.message-header dl div{display:grid;grid-template-columns:58px 1fr;font-size:12px}.message-header dt{color:var(--muted)}.message-header dd{margin:0;word-break:break-all}.attachments{display:flex;gap:6px;margin-top:14px}.message-tools{display:flex;justify-content:flex-end;padding:8px 14px;background:#f7f9fa;border-bottom:1px solid var(--line)}.mail-body{padding:24px;white-space:pre-wrap;word-break:break-word;line-height:1.65;font-family:Consolas,"Microsoft YaHei",monospace;font-size:13px}.mail-frame{display:block;width:100%;min-height:560px;border:0;background:#fff}.login-page{background:#edf1f3}.login-shell{min-height:100vh;display:grid;grid-template-columns:1fr 420px;max-width:980px;margin:auto;align-items:center;gap:70px;padding:30px}.login-brand h1{font-size:28px;margin:16px 0 7px}.login-brand p,.login-box>p{color:var(--muted)}.login-box{background:#fff;border:1px solid var(--line);border-radius:7px;box-shadow:var(--shadow);padding:28px;display:grid;gap:18px}.login-box h2{margin:0;font-size:19px}.login-box>p{margin:-12px 0 0;font-size:12px}.login-box .btn{height:40px}
@media(max-width:900px){.create-form{grid-template-columns:1fr 1fr}.create-button{grid-column:1/-1}.stats-grid{grid-template-columns:1fr 1fr}.mini-stats{display:none}.filterbar{grid-template-columns:1fr 1fr}.filterbar input{grid-column:1/-1}.message-row{grid-template-columns:10px minmax(120px,180px) 1fr}.message-row time{display:none}.login-shell{grid-template-columns:1fr;max-width:480px;gap:20px}.login-brand{display:none}}
@media(max-width:620px){.header-inner{padding:0 14px}.header-inner nav a,.icon-link{padding:0 9px}.page{padding:18px 12px}.page-title,.mailbox-head{align-items:flex-start;flex-direction:column}.stats-grid{gap:8px}.create-form,.filterbar{grid-template-columns:1fr}.filterbar input{grid-column:auto}.message-row{grid-template-columns:10px 1fr;padding:12px}.message-row .sender{grid-column:2}.message-row .subject{grid-column:2}.row-actions{justify-content:flex-start}.brand>span:last-child{display:none}}
.data-table{min-width:920px}.pagination{display:flex;align-items:center;justify-content:space-between;gap:12px;padding-top:14px;color:var(--muted);font-size:12px}.pagination>div{display:flex;gap:7px}
.api-key-panel{display:flex;align-items:center;justify-content:space-between;gap:20px;background:#eef8f6;border:1px solid #b8ddd7;border-radius:7px;padding:16px 18px;margin-bottom:20px}.api-key-copy{display:flex;align-items:center;gap:24px;min-width:0}.api-key-panel h2{font-size:15px;margin:3px 0 4px}.api-key-panel p{margin:0;color:var(--muted);font-size:12px}.api-key-panel p code{font-family:Consolas,monospace;color:#075f57}.api-key-value{display:flex;align-items:center;gap:8px;min-width:0}.api-key-value>code{display:block;max-width:480px;overflow:auto;white-space:nowrap;border:1px solid #b8d8d3;background:#fff;padding:9px 10px;border-radius:5px;color:#075f57;font-family:Consolas,monospace;font-size:12px}
@media(max-width:900px){.api-key-panel,.api-key-copy{align-items:stretch;flex-direction:column}.api-key-value>code{max-width:100%}}
@media(max-width:620px){.pagination{align-items:stretch;flex-direction:column}.pagination>div .btn{flex:1}}