:root{--bg: #0f172a;--card: #ffffff;--brand: #4f46e5;--brand-2: #6366f1;--text: #1e293b;--muted: #64748b;--ok: #16a34a;--line: #e2e8f0}*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Microsoft YaHei,sans-serif;background:linear-gradient(160deg,#eef2ff,#f8fafc 40%,#e0f2fe);color:var(--text);min-height:100vh}.app{min-height:100vh;display:flex;flex-direction:column}.topbar{display:flex;align-items:center;justify-content:space-between;padding:14px 24px;background:#fffc;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:10}.brand{font-weight:700;font-size:18px}.brand .sub{color:var(--muted);font-weight:500;font-size:13px}.nav{display:flex;align-items:center;gap:18px}.nav a{color:var(--text);text-decoration:none;font-size:14px}.nav a:hover{color:var(--brand)}.link{background:none;border:none;color:var(--muted);cursor:pointer;font-size:14px}.link:hover{color:#dc2626}.main{flex:1;width:100%;max-width:860px;margin:0 auto;padding:28px 20px}.foot{text-align:center;padding:18px;color:var(--muted);font-size:13px}.loading{display:grid;place-items:center;height:100vh;color:var(--muted)}.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:22px;box-shadow:0 8px 24px #0f172a0f;margin-top:14px}h2{margin:4px 0 6px}.hint{color:var(--muted);font-size:14px;margin:0 0 10px;line-height:1.6}label{display:block;font-size:14px;margin-bottom:14px;color:var(--muted)}input{display:block;width:100%;margin-top:6px;padding:10px 12px;border:1px solid var(--line);border-radius:9px;font-size:15px;color:var(--text);outline:none}input:focus{border-color:var(--brand);box-shadow:0 0 0 3px #4f46e51f}.btn{background:#f1f5f9;border:1px solid var(--line);color:var(--text);padding:9px 16px;border-radius:9px;font-size:14px;cursor:pointer;transition:.15s}.btn:hover{background:#e2e8f0}.btn.primary{background:var(--brand);border-color:var(--brand);color:#fff;width:100%;padding:11px;font-size:15px}.btn.primary:hover{background:var(--brand-2)}.btn.primary:disabled{opacity:.6;cursor:default}.btn.ghost{background:none;margin-top:12px}.auth-wrap{display:grid;place-items:center;min-height:calc(100vh - 120px)}.auth-card{width:100%;max-width:380px}.auth-card h1{margin:0 0 16px;text-align:center}.switch{text-align:center;margin-top:14px;font-size:14px;color:var(--muted)}.switch a{color:var(--brand);text-decoration:none}.err{background:#fef2f2;color:#dc2626;border:1px solid #fecaca;padding:9px 12px;border-radius:9px;font-size:14px;margin-bottom:12px}.copybox{border:1px dashed var(--line);border-radius:11px;padding:14px;margin-bottom:14px;background:#f8fafc}.cb-label{font-size:13px;color:var(--muted);margin-bottom:8px}.cb-value{word-break:break-all;font-size:13px;color:var(--text);margin-bottom:10px;line-height:1.5}.cb-value.mono{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;background:#fff;border:1px solid var(--line);border-radius:8px;padding:8px 10px}.cb-actions{display:flex;align-items:center;gap:10px;flex-wrap:wrap}.btn.link{background:transparent;border:none;color:var(--muted);padding:6px 4px;text-decoration:underline;font-size:13px}.btn.link:hover{color:var(--text);background:transparent}.preview-box{border:1px solid var(--line);border-radius:11px;padding:14px;margin-bottom:14px;background:#fff}.preview-frame{min-height:34px;border:1px dashed var(--line);border-radius:8px;padding:10px;font-size:14px;color:var(--text);background:#fcfcfd}.preview-frame:empty:after{content:"（此处为隐形回执像素，框内不可见）";color:var(--muted);font-size:12px}.ok-badge{display:inline-block;background:#dcfce7;color:var(--ok);border:1px solid #bbf7d0;padding:5px 12px;border-radius:999px;font-size:14px;margin-bottom:14px}.mail-jump{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin:6px 0 12px}.mj-tip{font-size:14px;color:var(--muted)}.toast{background:#eef2ff;color:var(--brand);border:1px solid #c7d2fe;padding:10px 12px;border-radius:9px;font-size:14px;margin-bottom:8px}.rc-head{display:flex;align-items:center;justify-content:space-between}.rc-table{width:100%;border-collapse:collapse;margin-top:14px;background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden;font-size:14px}.rc-table th,.rc-table td{padding:11px 12px;text-align:left;border-bottom:1px solid var(--line)}.rc-table th{background:#f8fafc;color:var(--muted);font-weight:600}.rc-table tr:last-child td{border-bottom:none}.tag{display:inline-block;padding:3px 10px;border-radius:999px;font-size:13px}.tag.read{background:#dcfce7;color:var(--ok)}.tag.unread{background:#fef9c3;color:#a16207}.tag.pending{background:#ffedd5;color:#c2410c}.tag.tracking{background:#dbeafe;color:#1d4ed8}.muted-note{color:var(--muted);font-size:12px;margin-left:2px}.status-banner{border-radius:10px;padding:12px 14px;margin-bottom:14px;font-size:13px;line-height:1.6}.status-banner.pending{background:#fff7ed;border:1px solid #fed7aa;color:#9a3412}.status-banner.tracking{background:#ecfdf5;border:1px solid #a7f3d0;color:#065f46}.confirm-row{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin:6px 0 14px}.confirm-tip{color:var(--muted);font-size:12px;max-width:360px}.btn.small{padding:5px 12px;font-size:13px}.btn.link.small{padding:2px 4px;font-size:13px}.ipcell{min-width:96px}.ip-list{list-style:none;margin:6px 0 0;padding:8px 10px;background:#f8fafc;border:1px solid var(--line);border-radius:8px;text-align:left}.ip-list li{display:flex;flex-direction:column;gap:2px;padding:3px 0}.ip-list li+li{border-top:1px dashed var(--line)}.ip-list code{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:12px;color:var(--text)}.empty{margin-top:18px;text-align:center;color:var(--muted);padding:40px;border:1px dashed var(--line);border-radius:12px;background:#fff}label.row{display:flex;align-items:center;gap:8px;flex-direction:row}label.row input[type=checkbox]{width:auto}textarea{width:100%;min-height:140px;border:1px solid var(--line);border-radius:8px;padding:10px;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:13px;resize:vertical;box-sizing:border-box}select{width:100%;padding:10px;border:1px solid var(--line);border-radius:8px;background:#fff;font-size:14px}.op-cell{min-width:220px;text-align:left}.letter-mail{margin-top:10px;padding:10px;background:#f8fafc;border:1px solid var(--line);border-radius:8px;text-align:left}.mail-actions{display:flex;gap:8px;margin-bottom:8px}.btn.small.link{background:transparent;border:none;color:var(--muted);text-decoration:underline;padding:5px 4px}.lv-wrap{min-height:100vh;background:linear-gradient(160deg,#eef2ff,#f8fafc);display:flex;flex-direction:column;align-items:center;justify-content:center;padding:32px 16px;box-sizing:border-box}.lv-card{width:100%;max-width:720px;background:#fff;border-radius:16px;box-shadow:0 10px 40px #0f172a14;padding:40px 36px;box-sizing:border-box;text-align:center}.lv-center{text-align:center;color:var(--muted)}.lv-lockicon{font-size:52px;margin-bottom:10px}.lv-title{margin:0 0 12px;font-size:22px;color:var(--text)}.lv-sub{color:var(--muted);font-size:14px}.lv-teaser{font-size:16px;color:#475569;font-style:italic;margin:12px 0}.lv-cdline{font-size:16px;color:#1d4ed8;margin-top:16px}.cd b{font-size:20px;color:#1d4ed8}.lv-tip{color:#94a3b8;font-size:13px;margin-top:20px}.lv-question{font-size:17px;color:var(--text);font-weight:600;margin:16px 0}.lv-form{display:flex;flex-direction:column;gap:12px;margin-top:20px;width:100%;max-width:420px;margin-left:auto;margin-right:auto}.lv-form input{width:100%;padding:14px 16px;border:1px solid var(--line);border-radius:10px;font-size:16px;box-sizing:border-box;text-align:center}.lv-form input:focus{outline:none;border-color:#2563eb;box-shadow:0 0 0 3px #2563eb26}.lv-form .btn{width:100%;padding:13px;font-size:16px}.lv-open-badge{display:inline-block;background:#dcfce7;color:#166534;padding:6px 14px;border-radius:999px;font-size:14px;margin-bottom:20px}.lv-content{text-align:left;line-height:1.75;color:var(--text);font-size:16px;word-break:break-word}.lv-content h1,.lv-content h2,.lv-content h3{margin-top:1.2em}.lv-content img{max-width:100%;border-radius:8px}.lv-content a{color:#2563eb}.lv-assets{text-align:left;margin-top:28px;border-top:1px solid var(--line);padding-top:18px}.lv-assets h3{font-size:15px;color:var(--muted);margin:0 0 12px}.lv-asset{margin:0 0 18px}.lv-asset img,.lv-asset video{max-width:100%;border-radius:10px;display:block}.lv-asset figcaption{font-size:12px;color:var(--muted);margin-top:6px}.lv-file{margin:8px 0;font-size:15px}.lv-foot{margin-top:20px;color:#94a3b8;font-size:12px}.opt-group{border:1px solid var(--line);border-radius:10px;padding:12px 14px 14px;margin:6px 0 14px}.opt-group legend{font-size:13px;font-weight:600;color:var(--text);padding:0 6px}.opt-group label.row{align-items:flex-start;margin:8px 0;font-size:14px;line-height:1.5;color:#334155}.opt-group label.row input[type=checkbox]{margin-top:2px;flex:0 0 auto}