:root{color:#183149;background:#edf4ff;font-family:Inter,Microsoft YaHei,PingFang SC,Arial,sans-serif}*{box-sizing:border-box}body{margin:0;min-width:320px;min-height:100vh;background:linear-gradient(180deg,#f4f8ff,#e5effd)}.app-layout{min-height:100vh;background:transparent}.app-header{height:auto;min-height:76px;padding:14px clamp(16px,4vw,48px);display:flex;align-items:center;justify-content:space-between;gap:16px;background:#f8fbffe0;border-bottom:1px solid rgba(183,204,230,.55)}.brand{min-width:0}.brand-icon{background:linear-gradient(180deg,#4b9aff,#286ceb);box-shadow:0 10px 20px #2f78ff40}.brand h3{margin:0;color:#183149}.app-content{padding:16px clamp(16px,4vw,48px) 32px;display:grid;gap:16px}.toolbar-card,.stat-card,.panel-card{border:1px solid rgba(255,255,255,.9);box-shadow:0 14px 30px #325b8e14}.toolbar-card{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap}.domain-form{flex:1 1 430px}.domain-field{flex:1}.domain-field .ant-form-item-control,.domain-field .ant-form-item-control-input{width:100%}.mail-options{justify-content:flex-end}.stat-card .ant-statistic-title{color:#6f7f90}.stat-card .ant-statistic-content{color:#183149;font-weight:800}.stat-icon{color:#fff;background:linear-gradient(180deg,#4f98ff,#2c6cef)}.panel-card{height:100%}.panel-card .ant-card-body{min-height:280px}.account-item,.account-item-active{cursor:pointer;padding:10px 12px!important;border-radius:10px;transition:background .2s,box-shadow .2s}.account-item:hover,.account-item-active{background:#edf5ff}.account-item-active{box-shadow:inset 3px 0 #1677ff}.account-item .ant-list-item-meta-title,.account-item-active .ant-list-item-meta-title{word-break:break-all}.mail-list .ant-list-item{padding:0 0 12px;border:0}.mail-card{width:100%;border-color:#d7e5fb}.mail-card-unread{border-color:#80b5ff}.mail-card-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:8px}.mail-card h5{margin:8px 0 4px}.mail-recipient,.mail-preview{margin:6px 0 0!important}.mail-preview{color:#6f7f90}.center-state{min-height:220px;display:grid;place-items:center}.detail-box{min-height:260px;margin-top:16px;padding:16px;overflow:auto;border:1px solid #dce7f5;border-radius:10px;background:#fbfdff}.detail-box iframe{display:block;width:100%;min-height:360px;border:0;background:#fff}.detail-box pre{margin:0;white-space:pre-wrap;word-break:break-word}@media(max-width:768px){.app-header{align-items:flex-start;flex-direction:column}.app-header>.ant-space:last-child{width:100%;justify-content:space-between}.toolbar-card{align-items:stretch}.mail-options{justify-content:flex-start}.mail-options .ant-select{min-width:92px}}