:root{font-family:"Segoe UI","Microsoft YaHei",sans-serif;color:#202b28;background:#f5f7f6;font-size:14px;font-synthesis:none;letter-spacing:0;--green:#147963;--border:#e2e8e5;--muted:#75817c;--red:#b44040}
*{box-sizing:border-box}body{margin:0}button,input,textarea{font:inherit}button,a,input,textarea{outline-offset:4px}button{cursor:pointer}button:disabled{cursor:default;opacity:.45}button:focus-visible,a:focus-visible{outline:2px solid var(--green)}button{color:inherit}a{color:inherit;text-decoration:none}svg{width:18px;height:18px;flex-shrink:0}h1,h2,h3,p{margin:0}h1{font-size:16px;font-weight:650}h2{font-size:20px;font-weight:650;overflow-wrap:anywhere}h3{font-size:18px}.topbar{height:72px;background:white;border-bottom:1px solid var(--border);display:flex;align-items:center;padding:0 28px;gap:24px}.brand{display:flex;align-items:center;gap:11px;font-size:18px;font-weight:700}.brand small{display:block;font-size:9px;color:var(--muted);font-weight:600;margin-top:2px}.privacy{display:flex;align-items:center;gap:7px;color:var(--green);font-size:12px;margin-left:auto}.button{border:1px solid #d9e1dd;border-radius:6px;padding:9px 14px;display:inline-flex;align-items:center;justify-content:center;gap:8px;background:white;white-space:nowrap;min-height:38px}.button:hover:not(:disabled){background:#edf2ef}.button.primary{color:white;background:var(--green);border-color:var(--green)}.button.primary:hover:not(:disabled){background:#106550}.button.subtle{border-color:transparent;background:transparent;color:#63716a}.button.danger{background:var(--red);color:white;border-color:var(--red)}.icon-button{width:34px;height:34px;flex-shrink:0;border:1px solid transparent;background:transparent;display:inline-flex;align-items:center;justify-content:center;border-radius:5px}.icon-button:hover:not(:disabled){background:#edf2ef}.icon-button.accent{background:#eaf4ef;color:var(--green)}.workspace{display:grid;grid-template-columns:260px minmax(0,1fr);height:calc(100dvh - 72px);min-height:500px}.accounts{display:flex;flex-direction:column;border-right:1px solid var(--border);min-height:0;background:#fafcfb}.panel-heading{display:flex;align-items:center;justify-content:space-between;padding:24px 20px 18px}.count{font-size:11px;font-weight:500;margin-left:5px;background:#e9efec;color:#65766d;padding:2px 6px;border-radius:4px}.search{margin:0 16px 18px;display:flex;align-items:center;gap:9px;border:1px solid var(--border);border-radius:5px;padding:9px 10px;color:#91a097;background:white}.search input{border:0;outline:0;width:100%;min-width:0;background:transparent;font-size:12px}.account-list{overflow:auto;flex:1;padding:0 9px}.account{border:0;background:transparent;padding:13px 12px;border-radius:5px;width:100%;text-align:left;display:flex;gap:10px;align-items:center;margin-bottom:4px}.account:hover{background:#edf2ef}.account.selected{background:#e7f1eb;color:#126b51}.account-avatar{display:flex;align-items:center;justify-content:center;width:31px;height:31px;flex-shrink:0;background:#e5ebe7;border-radius:5px;color:#718277}.selected .account-avatar{background:#cce4d8;color:#197659}.account-name{font-size:12px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;display:block}.account-sub{display:block;color:var(--muted);font-size:10px;margin-top:5px}.account-copy{min-width:0}.account-footer{display:flex;align-items:center;justify-content:space-between;padding:12px;border-top:1px solid var(--border)}.account-footer .button{font-size:12px}.mailbox{display:flex;flex-direction:column;min-width:0;min-height:0;background:white}.mailbox-heading{padding:26px 28px 22px;display:flex;align-items:center;justify-content:space-between;gap:16px}.mailbox-heading>div{min-width:0}.eyebrow{display:block;font-size:11px;color:#8b9690;margin-bottom:9px}.mail-toolbar{height:54px;min-height:54px;display:flex;align-items:center;justify-content:space-between;gap:12px;padding:0 28px;border-bottom:1px solid var(--border)}.tabs{align-self:stretch;display:flex;gap:24px}.tab{display:flex;align-items:center;gap:7px;border:0;border-bottom:2px solid transparent;background:transparent;padding:0 1px;color:#75837b;font-size:13px;white-space:nowrap}.tab.active{color:var(--green);border-bottom-color:var(--green)}.auto-refresh{display:flex;gap:7px;align-items:center;font-size:12px;white-space:nowrap}.auto-refresh small{color:var(--muted)}.auto-refresh input{accent-color:var(--green);width:16px;height:16px}.status{padding:11px 28px;font-size:11px;background:#f7faf8;color:#7c8a81;border-bottom:1px solid var(--border);min-height:38px;overflow-wrap:anywhere}.status.error-state{color:var(--red);background:#fff6f4}.mail-columns{display:grid;grid-template-columns:340px minmax(0,1fr);flex:1;min-height:0}.message-column{border-right:1px solid var(--border);display:flex;flex-direction:column;min-height:0;min-width:0}.message-list{overflow:auto;flex:1}.message-item{display:block;width:100%;border:0;border-bottom:1px solid #edf0ee;background:white;padding:20px;text-align:left}.message-item:hover,.message-item.selected{background:#f0f6f2}.message-item.selected{box-shadow:inset 3px 0 var(--green)}.message-meta{display:flex;justify-content:space-between;gap:10px;font-size:10px;color:#8b958f;margin-bottom:9px}.message-sender{overflow:hidden;white-space:nowrap;text-overflow:ellipsis;min-width:0}.message-date{flex-shrink:0}.message-subject{font-size:13px;font-weight:650;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;margin-bottom:7px}.message-preview{font-size:11px;color:#8c9690;line-height:1.7;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;overflow-wrap:anywhere}.message-detail{overflow:auto;min-width:0;position:relative;padding:32px}.message-detail:has(.welcome){display:flex;align-items:center;justify-content:center;background:#fdfefd}.empty{padding:42px 20px;text-align:center;color:#8b9890;font-size:12px;line-height:1.9}.empty h3{margin-top:20px;color:#394e42;font-weight:600}.empty p{margin-top:10px}.empty .button{margin-top:25px}.welcome{max-width:400px}.welcome>img{opacity:.9}.privacy-note{margin-top:55px;display:flex;align-items:center;justify-content:center;gap:6px;color:#9aa79e;font-size:10px}.privacy-note svg{width:13px;height:13px}.detail-header{border-bottom:1px solid var(--border);padding-bottom:24px;margin-bottom:24px}.detail-header h3{line-height:1.6;overflow-wrap:anywhere}.detail-meta{font-size:12px;color:#8b9690;margin-top:10px;overflow-wrap:anywhere;line-height:1.8}.detail-actions{display:flex;justify-content:flex-end;margin-top:8px}.body-text{white-space:pre-wrap;overflow-wrap:anywhere;word-break:break-word;font-size:14px;line-height:1.9;color:#37483e;font-family:inherit;margin:0}.pagination{padding:10px 12px;display:flex;gap:16px;justify-content:center;align-items:center;font-size:11px;color:var(--muted);border-top:1px solid var(--border)}[hidden]{display:none!important}dialog{width:min(620px,calc(100% - 32px));border:1px solid var(--border);border-radius:8px;padding:28px;color:#283c30;box-shadow:0 20px 80px #153e2526}dialog::backdrop{background:#17271e70;backdrop-filter:blur(2px)}.dialog-heading{display:flex;align-items:flex-start;justify-content:space-between;margin-bottom:25px}.field-label{font-size:13px;font-weight:600}.format-hint{font-size:11px;color:#7c8c81;margin:9px 0 12px;overflow-wrap:anywhere}textarea{border:1px solid #cfdcd3;border-radius:5px;padding:13px;width:100%;resize:vertical;min-height:150px;max-height:50dvh;line-height:1.8;background:#fafcfb;font-family:Consolas,"Microsoft YaHei",monospace;font-size:12px}textarea:focus{outline:2px solid #b7d7c5;border-color:var(--green)}.import-meta{display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:11px;color:#86948a;margin-top:10px}.file-button{display:flex;align-items:center;gap:6px;cursor:pointer;color:var(--green);padding:6px 0}.privacy-explanation{display:flex;gap:9px;padding:13px;background:#eff6f1;border-radius:5px;font-size:11px;line-height:1.9;color:#6b8574;margin-top:16px}.privacy-explanation svg{margin-top:3px}.dialog-footer{display:flex;justify-content:flex-end;gap:10px;margin-top:24px}.error{font-size:12px;color:var(--red);white-space:pre-line;line-height:1.7;margin-top:10px}#confirmDialog{max-width:420px}#confirmDialog p{font-size:13px;color:#7d8c82;margin-top:15px;line-height:1.8}.toast{position:fixed;bottom:28px;left:50%;transform:translateX(-50%);padding:12px 20px;background:#243f2f;color:white;font-size:12px;border-radius:6px;z-index:10;max-width:calc(100vw - 32px);text-align:center}
@media(min-width:1600px){.workspace{grid-template-columns:280px minmax(0,1fr)}.mail-columns{grid-template-columns:390px minmax(0,1fr)}.message-detail{padding:40px 48px}}
@media(max-width:1100px){.workspace{grid-template-columns:220px minmax(0,1fr)}.mail-columns{grid-template-columns:280px minmax(0,1fr)}.mailbox-heading,.message-detail{padding:22px}.mail-toolbar{padding:0 22px}.status{padding:10px 22px}.auto-refresh small{display:none}.tabs{gap:16px}}
@media(max-width:800px){.topbar{padding:0 16px;height:62px;gap:12px}.privacy{font-size:10px}.privacy svg{display:none}.topbar>.button{padding:7px}.topbar>.button span{display:none}.workspace{height:auto;min-height:calc(100dvh - 62px);display:block}.accounts{border-right:0;border-bottom:1px solid var(--border);max-height:240px}.panel-heading{padding:13px 16px 8px}.search{margin:0 16px 8px;padding:7px 10px}.account-list{display:flex;overflow:auto;min-height:55px;gap:5px;padding:0 12px 9px;flex:none}.account{width:200px;flex-shrink:0;margin:0;padding:9px}.account-footer{padding:4px 12px}.account-footer .button{min-height:30px;padding:4px 8px}.mailbox-heading{padding:20px 16px 15px;align-items:center}.mailbox-heading h2{font-size:17px}.mailbox-heading .button{font-size:12px;padding:9px 10px;flex-shrink:0}.mail-toolbar{padding:0 16px;height:48px;min-height:48px}.status{padding:10px 16px}.mail-columns{grid-template-columns:minmax(0,1fr);min-height:420px}.message-column{border-right:0;border-bottom:1px solid var(--border);max-height:360px}.message-list:empty{display:none}.message-detail{min-height:320px;padding:24px 18px}.message-item{padding:15px 18px}.welcome{padding:25px 5px}.privacy-note{margin-top:35px}.auto-refresh{font-size:11px}.tabs{gap:20px}.tab{font-size:12px}.brand{font-size:16px}.brand img{width:29px;height:29px}dialog{padding:22px}.empty{padding:20px}.message-column:has(.empty){max-height:110px}}
@media(prefers-reduced-motion:no-preference){.loading svg{animation:spin 1.2s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}}