:root{--x-bg:#f0f2f5;--x-surface:#ffffff;--x-surface-2:#fbfcfe;--x-surface-3:#f6f8fc;--x-border:#e8eaed;--x-text:#1a1d21;--x-muted:#5f6368;--x-accent:#1a73e8;--x-radius:10px;--x-shadow:0 1px 2px rgba(60, 64, 67, 0.08);--x-shadow-hover:0 2px 8px rgba(60, 64, 67, 0.12)}body.xysmt-app{font-family:system-ui,-apple-system,segoe ui,Roboto,pingfang sc,microsoft yahei,sans-serif;color:var(--x-text);background:var(--x-bg)!important}.x-navbar{box-shadow:var(--x-shadow);border-bottom:1px solid var(--x-border)!important}.x-navbar .navbar-brand{font-weight:600;letter-spacing:-.02em;color:var(--x-text)!important}.x-panel{background:var(--x-surface);border:1px solid var(--x-border)!important;border-radius:var(--x-radius)!important;box-shadow:var(--x-shadow)}.x-panel:hover{box-shadow:var(--x-shadow-hover)}.x-list-group .list-group-item{border-color:var(--x-border);border-radius:8px!important;margin-bottom:4px;border:1px solid transparent}.x-list-group .list-group-item:hover{background:#f8f9fa}.x-list-group .list-group-item.active{background:rgba(26,115,232,8%);border-color:rgba(26,115,232,.25);color:var(--x-accent);font-weight:600}.btn-primary{--bs-btn-bg:var(--x-accent);--bs-btn-border-color:var(--x-accent);--bs-btn-hover-bg:#1557b0;--bs-btn-hover-border-color:#1557b0}.form-control:focus,.form-select:focus{border-color:rgba(26,115,232,.45);box-shadow:0 0 0 .2rem rgba(26,115,232,.15)}.x-toast-mini{font-size:.875rem}.x-area-toolbar{background:var(--x-surface-3);border:1px solid var(--x-border);border-radius:10px;padding:10px 12px}.x-area-list{background:var(--x-surface)}.x-area-detail{background:var(--x-surface-2)}.x-subsection-title{font-size:12px;color:var(--x-muted);font-weight:600;letter-spacing:.02em}.x-divider-soft{border-top:1px solid rgba(0,0,0,6%)}.x-section-bar{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:8px 12px;background:var(--x-surface-3);border:1px solid var(--x-border);border-radius:10px}.mail-card.x-unread .msg-subject{font-weight:800}.mail-card.x-unread .t-small{color:#1f3b6d}.mail-card.x-unread::before{content:'';position:absolute;left:10px;top:14px;width:8px;height:8px;border-radius:999px;background:var(--x-accent);box-shadow:0 0 0 3px rgba(26,115,232,.12)}.mail-card{position:relative}.mail-card.x-folder-hide,.mail-card.x-search-hide{display:none!important}