/* ================= 全局基础与字体设置 ================= */
:root {
    --sidebar-width: 320px;
    --mail-list-width: 450px;
    --border-color: #e2e8f0;
    --bg-gray: #f8fafc;
    --bg-white: #ffffff;
    --text-primary: #1e293b;
    --text-secondary: #475569;
    --text-placeholder: #94a3b8;
    
    /* 主色系 - 蓝紫渐变 */
    --primary-color: #667eea;
    --primary-light: #f0f1ff;
    --primary-dark: #5a67d8;
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --primary-gradient-hover: linear-gradient(135deg, #7c8ff5 0%, #8a5cb3 100%);
    
    /* 成功色 - 青绿渐变 */
    --success-color: #11998e;
    --success-light: #e8f8f5;
    --success-gradient: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
    
    /* 警告色 */
    --warning-color: #f59e0b;
    --warning-light: #fffbeb;
    
    /* 危险色 */
    --danger-color: #ef4444;
    --danger-light: #fef2f2;
    
    /* 悬浮与激活态 */
    --hover-bg: #f1f5f9;
    --active-bg: #eff6ff;
    --hover-gradient: linear-gradient(135deg, rgba(102, 126, 234, 0.08) 0%, rgba(118, 75, 162, 0.08) 100%);
    --active-gradient: linear-gradient(135deg, rgba(102, 126, 234, 0.12) 0%, rgba(118, 75, 162, 0.12) 100%);
    
    /* 阴影系统 */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-glow: 0 0 20px rgba(102, 126, 234, 0.25);
    --shadow-card: 0 4px 20px rgba(102, 126, 234, 0.12);
    
    /* 圆角 */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 20px;
}

body, html {
    margin: 0; padding: 0; height: 100vh; overflow: hidden;
    font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    font-size: 15px; color: var(--text-primary);
    background-color: var(--bg-gray);
    -webkit-font-smoothing: antialiased;
    line-height: 1.5;
}

* { box-sizing: border-box; }

::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: #cbd5e1; border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: #94a3b8; }

.hover-copy-icon { cursor: pointer; color: var(--text-placeholder); transition: all 0.2s; font-size: 16px; }
.hover-copy-icon:hover { color: var(--primary-color); transform: scale(1.1); }

#app { height: 100vh; display: flex; flex-direction: column; }
.app-content { flex: 1; min-height: 0; display: flex; flex-direction: column; }
.app-content-desktop > .pc-app-view,
.app-content-desktop > .m-app-view { height: 100%; }

/* ================= 桌面版自定义标题栏 ================= */
.custom-titlebar {
  height: 38px;
  background: #fff;
  display: flex;
  align-items: center;
  flex-shrink: 0;
  user-select: none;
  border-bottom: 1px solid #e2e8f0;
}
.titlebar-drag {
  flex: 1;
  height: 100%;
  -webkit-app-region: drag;
}
.titlebar-controls {
  display: flex;
  align-items: center;
  gap: 8px;
  padding-left: 16px;
  height: 100%;
}
.tb-btn {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s;
  position: relative;
  padding: 0;
}
.tb-btn span {
  display: none;
  font-size: 10px;
  line-height: 1;
  color: rgba(0,0,0,0.5);
  font-weight: 700;
}
.tb-btn:hover span { display: block; }
.tb-close { background: #ff5f57; }
.tb-min { background: #febc2e; }
.tb-max { background: #28c840; }

/* ================= PC 端现代 3 栏架构 ================= */
.pc-app-view { display: flex; height: 100vh; width: 100vw; overflow: hidden; background: linear-gradient(180deg, #f8fafc 0%, #f1f5f9 100%); }

.pc-sidebar {
    width: var(--sidebar-width); min-width: var(--sidebar-width);
    background: var(--bg-white); 
    border-right: 1px solid var(--border-color);
    display: flex; flex-direction: column; flex-shrink: 0; z-index: 10;
    box-shadow: var(--shadow-md);
}
.pc-sidebar-header {
    height: 64px; display: flex; align-items: center; padding: 0 20px;
    font-size: 18px; font-weight: 700; color: var(--text-primary);
    letter-spacing: -0.5px;
    border-bottom: 1px solid var(--border-color);
    background: linear-gradient(135deg, rgba(255,255,255,1) 0%, rgba(248,250,252,0.8) 100%);
    position: relative;
    overflow: hidden;
}
.pc-sidebar-header::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: var(--primary-gradient);
}
.pc-sidebar-header .el-icon {
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-size: 26px;
    margin-right: 12px;
}
.pc-sidebar-menu { flex: 1; overflow-y: auto; padding: 12px 12px 16px; }

.pc-menu-item {
    padding: 10px 14px; display: flex; align-items: center; margin-bottom: 2px;
    color: var(--text-secondary); font-weight: 500; cursor: pointer; transition: all 0.2s ease;
    border-radius: var(--radius-md); font-size: 15px;
}
.pc-menu-item:hover { 
    background: var(--hover-gradient); 
    color: var(--primary-color);
    transform: translateX(2px);
}
.pc-menu-item.active { 
    background: var(--active-gradient); 
    color: var(--primary-color); 
    font-weight: 600;
    box-shadow: inset 0 0 0 1px rgba(102, 126, 234, 0.2);
}
.pc-menu-item .el-icon { font-size: 20px; margin-right: 12px; opacity: 0.85; }
.pc-menu-item.active .el-icon { opacity: 1; }

.pc-sidebar-divider { height: 1px; background: linear-gradient(90deg, transparent, var(--border-color), transparent); margin: 14px 10px; }

.pc-group-header {
    padding: 10px 14px; display: flex; justify-content: space-between; align-items: center;
    font-size: 13px; color: var(--text-secondary); font-weight: 600; cursor: pointer;
    margin-top: 6px;
    user-select: none;
    border-radius: var(--radius-md);
    transition: all 0.2s ease;
}
.pc-group-header:hover { 
    background: var(--hover-gradient); 
    color: var(--primary-color);
}
.group-chevron { transition: transform 0.25s ease; }
.group-chevron.is-collapsed { transform: rotate(-90deg); }

.pc-account-list { display: flex; flex-direction: column; margin-top: 4px; }
.pc-account-item {
    padding: 10px 14px; display: flex; align-items: center; margin: 0 0 3px 0;
    cursor: pointer; transition: all 0.2s ease; position: relative; border-radius: var(--radius-md);
    border: 1px solid transparent;
}
.pc-account-item:hover { 
    background: var(--hover-gradient);
    transform: translateX(2px);
}
.pc-account-item.active { 
    background: var(--active-gradient);
    border: 1px solid rgba(102, 126, 234, 0.2);
}
.pc-account-item.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 60%;
    background: var(--primary-gradient);
    border-radius: 0 3px 3px 0;
}

.acc-email { flex: 1; font-size: 15px; color: var(--text-primary); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; margin-left: 10px;}
.pc-account-item.active .acc-email { color: var(--primary-color); font-weight: 500; }
.acc-badge { 
    background: var(--primary-gradient); color: #fff; font-size: 12px; 
    padding: 2px 10px; border-radius: 12px; font-weight: 600; min-width: 22px; text-align: center;
    box-shadow: 0 2px 8px rgba(102, 126, 234, 0.3);
}

.pc-sidebar-footer {
    padding: 16px;
    border-top: 1px solid var(--border-color);
    background: linear-gradient(180deg, rgba(248,250,252,0.5) 0%, rgba(248,250,252,1) 100%);
}
.count-card {
    border-radius: var(--radius-lg);
    padding: 24px 18px;
    text-align: center;
    color: #fff;
    background: var(--primary-gradient);
    border: none;
    box-shadow: 0 8px 32px rgba(102, 126, 234, 0.35);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}
.count-card::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.15) 0%, transparent 60%);
    animation: shimmer 3s ease-in-out infinite;
}
@keyframes shimmer {
    0%, 100% { transform: translateX(-30%) translateY(-30%); }
    50% { transform: translateX(30%) translateY(30%); }
}
.count-icon { font-size: 28px; margin-bottom: 12px; opacity: 0.95; }
.count-label { font-size: 14px; opacity: 0.95; margin-bottom: 8px; font-weight: 600; letter-spacing: 0.3px; }
.count-value { font-size: 42px; font-weight: 800; line-height: 1; letter-spacing: -1px; text-shadow: 0 2px 12px rgba(0,0,0,0.15); }

/* 第二栏：邮件列表 */
.pc-mail-list-panel {
    width: var(--mail-list-width);
    min-width: var(--mail-list-width);
    max-width: var(--mail-list-width);
    background: var(--bg-white); border-right: 1px solid var(--border-color);
    display: flex; flex-direction: column; flex-shrink: 0; z-index: 5;
    box-shadow: 2px 0 12px rgba(0, 0, 0, 0.04);
}
.pc-mail-list-header { 
    padding: 18px 20px; border-bottom: 1px solid var(--border-color); 
    background: rgba(255,255,255,0.95); backdrop-filter: blur(12px);
    position: sticky; top: 0; z-index: 2;
}
.mail-list-search { margin-bottom: 14px; }
.mail-list-search .el-input__wrapper {
    background-color: var(--bg-gray);
    border-radius: var(--radius-lg);
    box-shadow: none !important;
    border: 1px solid transparent;
    transition: 0.25s ease;
}
.mail-list-search .el-input__wrapper:hover { border-color: #cbd5e1; }
.mail-list-search .el-input__wrapper.is-focus { 
    background: #fff; 
    border-color: var(--primary-color); 
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.15) !important;
}
.mail-list-title-row { display: flex; justify-content: space-between; align-items: center; margin-bottom: 12px; }
.mail-count { font-size: 13px; color: var(--text-placeholder); font-weight: 500; margin-left: 8px; background: var(--bg-gray); padding: 3px 10px; border-radius: 12px; }
.mail-sort-btn { font-size: 13px; color: var(--text-secondary); cursor: pointer; display: flex; align-items: center; padding: 6px 10px; border-radius: 6px; transition: 0.2s; }
.mail-sort-btn:hover { background: var(--hover-bg); color: var(--primary-color); }

.mail-folder-tabs { display: flex; align-items: center; gap: 8px; }
.folder-tab {
    height: 32px;
    padding: 0 12px;
    border: 1px solid var(--border-color);
    background: #fff;
    border-radius: var(--radius-md);
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    cursor: pointer;
    transition: 0.2s ease;
}
.folder-tab:hover { 
    background: var(--hover-gradient);
    border-color: rgba(102, 126, 234, 0.2);
}
.folder-tab.active {
    background: var(--active-gradient);
    border: 1px solid rgba(102, 126, 234, 0.3);
    color: var(--primary-color);
    box-shadow: 0 2px 8px rgba(102, 126, 234, 0.15);
}

.pc-mail-list-items { flex: 1; overflow-y: auto; }
.pc-mail-item {
    padding: 16px 20px; border-bottom: 1px solid var(--border-color);
    cursor: pointer; display: flex; transition: all 0.2s ease; position: relative;
    background: var(--bg-white);
}
.pc-mail-item:hover { 
    background: var(--hover-gradient); 
    transform: translateX(3px);
    box-shadow: inset 3px 0 0 var(--primary-color);
}
.pc-mail-item.active { 
    background: var(--active-gradient); 
    box-shadow: inset 3px 0 0 var(--primary-color);
}
.pc-mail-dot {
    position: absolute; left: 8px; top: 22px;
    width: 8px; height: 8px; border-radius: 50%; 
    background: var(--primary-gradient);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.15);
}
.pc-mail-info { flex: 1; min-width: 0; }
.pc-mail-top { display: flex; justify-content: space-between; margin-bottom: 6px; align-items: center; }
.pc-mail-sender { font-size: 15px; font-weight: 600; color: var(--text-primary); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: 70%; }
.pc-mail-date { font-size: 12px; color: var(--text-placeholder); flex-shrink: 0; font-weight: 500; display: none; }
.pc-mail-subject { font-size: 15px; color: var(--text-secondary); margin-bottom: 6px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-weight: 500; }
.pc-mail-item.active .pc-mail-subject, .pc-mail-item:hover .pc-mail-subject { color: var(--primary-color); }
.pc-mail-preview { font-size: 13px; color: var(--text-placeholder); overflow: hidden; text-overflow: ellipsis; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; line-height: 1.5; }
.pc-mail-time { margin-top: 8px; font-size: 12px; color: var(--text-placeholder); font-weight: 500; }
.empty-list-state { padding: 60px 20px; text-align: center; color: var(--text-placeholder); font-size: 15px; }


/* 第三栏：内容显示区 */
.pc-main-content {
    flex: 1; display: flex; flex-direction: column;
    background: var(--bg-white); min-width: 0;
}
.pc-topbar {
    height: 64px; display: flex; align-items: center; justify-content: space-between;
    padding: 0 24px; background: var(--bg-white); border-bottom: 1px solid var(--border-color);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
}
.pc-search-box { flex: 1; max-width: 480px; }
.pc-search-box .el-input__wrapper {
    background-color: var(--bg-gray); border-radius: var(--radius-lg); 
    box-shadow: none !important; padding: 8px 14px;
    border: 1px solid transparent; transition: 0.25s ease;
}
.pc-search-box .el-input__wrapper:hover { border-color: #cbd5e1; }
.pc-search-box .el-input__wrapper.is-focus { 
    background: #fff; 
    border-color: var(--primary-color); 
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.15) !important;
}

.pc-top-actions { display: flex; gap: 10px; }
.pc-top-actions .el-button.is-circle { 
    width: 36px; height: 36px; 
    border: 1px solid var(--border-color); 
    box-shadow: none;
    transition: all 0.2s ease;
}
.pc-top-actions .el-button.is-circle:hover { 
    background: var(--hover-gradient); 
    border-color: rgba(102, 126, 234, 0.3);
    transform: translateY(-1px);
}
.pc-top-actions .el-button--primary.is-circle {
    color: #fff;
    --el-button-text-color: #fff;
    --el-button-hover-text-color: #fff;
    background: var(--primary-gradient);
    border-color: transparent;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}
.pc-top-actions .el-button--primary.is-circle:hover,
.pc-top-actions .el-button--primary.is-circle:focus-visible {
    color: #fff;
    background: var(--primary-gradient-hover);
    border-color: transparent;
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(102, 126, 234, 0.4);
}

.pc-dashboard-view { padding: 24px; flex: 1; overflow-y: auto; background: linear-gradient(180deg, #f8fafc 0%, #f1f5f9 100%); }
.pc-table-card {
    background: var(--bg-white); padding: 28px; border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card); border: 1px solid var(--border-color);
}
.dashboard-toolbar { margin-bottom: 24px; display: flex; gap: 12px; flex-wrap: wrap; }

.dashboard-toolbar .el-button--primary,
.dashboard-toolbar .el-button--success,
.dashboard-toolbar .el-button--warning,
.dashboard-toolbar .el-button--danger,
.dashboard-toolbar .el-button--info {
    color: #fff;
    --el-button-text-color: #fff;
    --el-button-hover-text-color: #fff;
    --el-button-active-text-color: #fff;
    --el-button-disabled-text-color: rgba(255, 255, 255, 0.55);
    --el-button-hover-border-color: transparent;
    --el-button-active-border-color: transparent;
}

.dashboard-toolbar .el-button--primary {
    background: var(--primary-gradient);
    border-color: transparent;
    box-shadow: 0 4px 14px rgba(102, 126, 234, 0.35);
    transition: all 0.25s ease;
}
.dashboard-toolbar .el-button--primary:hover,
.dashboard-toolbar .el-button--primary:focus-visible {
    color: #fff;
    background: var(--primary-gradient-hover);
    border-color: transparent;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.45);
}
.dashboard-toolbar .el-button--success {
    background: var(--success-gradient);
    border-color: transparent;
    box-shadow: 0 4px 14px rgba(17, 153, 142, 0.35);
    transition: all 0.25s ease;
}
.dashboard-toolbar .el-button--success:hover,
.dashboard-toolbar .el-button--success:focus-visible {
    color: #fff;
    background: linear-gradient(135deg, #14b8aa 0%, #4ade80 100%);
    border-color: transparent;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(17, 153, 142, 0.45);
}
.dashboard-toolbar .el-button--warning {
    background: linear-gradient(135deg, #f59e0b 0%, #f97316 100%);
    border-color: transparent;
    box-shadow: 0 4px 14px rgba(245, 158, 11, 0.35);
    transition: all 0.25s ease;
}
.dashboard-toolbar .el-button--warning:hover,
.dashboard-toolbar .el-button--warning:focus-visible {
    color: #fff;
    background: linear-gradient(135deg, #fbbf24 0%, #fb923c 100%);
    border-color: transparent;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(245, 158, 11, 0.45);
}
.dashboard-toolbar .el-button--danger {
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
    border-color: transparent;
    box-shadow: 0 4px 14px rgba(239, 68, 68, 0.35);
    transition: all 0.25s ease;
}
.dashboard-toolbar .el-button--danger:hover,
.dashboard-toolbar .el-button--danger:focus-visible {
    color: #fff;
    background: linear-gradient(135deg, #f87171 0%, #ef4444 100%);
    border-color: transparent;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(239, 68, 68, 0.45);
}
.dashboard-toolbar .el-button--info {
    background: linear-gradient(135deg, #64748b 0%, #475569 100%);
    border-color: transparent;
    box-shadow: 0 4px 14px rgba(100, 116, 139, 0.3);
    transition: all 0.25s ease;
}
.dashboard-toolbar .el-button--info:hover,
.dashboard-toolbar .el-button--info:focus-visible {
    color: #fff;
    background: linear-gradient(135deg, #94a3b8 0%, #64748b 100%);
    border-color: transparent;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(100, 116, 139, 0.4);
}

.el-table { border-radius: var(--radius-md); overflow: hidden; border: 1px solid var(--border-color); }
.el-table th.el-table__cell { 
    background: linear-gradient(180deg, #f8fafc 0%, #f1f5f9 100%) !important; 
    font-weight: 600; color: var(--text-secondary); border-bottom: 1px solid var(--border-color); height: 48px; font-size: 14px;
}
.el-table td.el-table__cell { border-bottom: 1px solid var(--border-color); padding: 14px 0; font-size: 14px; }
.el-table__row:hover td.el-table__cell { 
    background: var(--hover-gradient) !important;
}
.el-table__row.active-row td.el-table__cell {
    background: var(--active-gradient) !important;
}

.pagination-container { margin-top: 24px; display: flex; justify-content: flex-end; }
.pagination-container .el-pagination {
    --el-pagination-button-bg-color: #fff;
    --el-pagination-button-color: var(--text-secondary);
    --el-pagination-hover-color: var(--primary-color);
}
.pagination-container .el-pagination.is-background .el-pager li:not(.is-disabled).is-active {
    background: var(--primary-gradient);
}

.pc-mail-detail-view {
    flex: 1; display: flex; flex-direction: column; overflow: hidden; padding: 0; background: var(--bg-white);
}
.pc-detail-card {
    flex: 1; display: flex; flex-direction: column;
    background: var(--bg-white); border-radius: 0; border: none;
    box-shadow: none; overflow: hidden;
}
.pc-detail-toolbar {
    display: flex; justify-content: space-between; align-items: center;
    padding: 14px 24px; border-bottom: 1px solid var(--border-color); background: var(--bg-white);
}
.pc-action-icons { display: flex; align-items: center; gap: 8px; }
.pc-action-icons .el-icon {
    padding: 8px; border-radius: var(--radius-md); cursor: pointer; color: var(--text-secondary); font-size: 18px; transition: all 0.2s ease;
}
.pc-action-icons .el-icon:hover { 
    background: var(--hover-gradient); 
    color: var(--primary-color);
    transform: scale(1.05);
}

.pc-detail-header { 
    padding: 28px 32px 24px; 
    border-bottom: 1px solid var(--border-color); 
    background: var(--bg-white);
    position: relative;
}
.pc-detail-header::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 32px;
    right: 32px;
    height: 2px;
    background: var(--primary-gradient);
    opacity: 0.3;
}
.pc-detail-subject { 
    font-size: 24px; font-weight: 700; color: var(--text-primary); 
    margin-bottom: 20px; line-height: 1.3; letter-spacing: -0.3px;
}
.detail-meta { display: grid; grid-template-columns: 90px 1fr; row-gap: 12px; column-gap: 12px; font-size: 15px; }
.meta-row { display: contents; }
.meta-label { color: var(--text-secondary); font-weight: 700; }
.meta-value { color: var(--text-primary); font-weight: 500; }

.pc-sender-info {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    margin-top: 15px;
}
.sender-avatar {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--primary-gradient);
    color: #fff;
    font-size: 16px;
    font-weight: 700;
    overflow: hidden;
    user-select: none;
}
.sender-meta {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 4px;
}
.sender-name {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
    word-break: break-all;
    line-height: 1.3;
}
.sender-email {
    font-size: 13px;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.pc-iframe-container {
    flex: 1; display: flex; flex-direction: column; min-height: 0; background: var(--bg-white); position: relative;
}
.safe-iframe {
    flex: 1; width: 100%; height: 100%; border: none; display: block;
}

.empty-mail-view { display: flex; flex-direction: column; align-items: center; justify-content: center; height: 100%; color: var(--text-placeholder); }
.empty-mail-view .el-icon { font-size: 80px; margin-bottom: 24px; color: #e2e8f0; }
.empty-mail-view p { font-size: 16px; color: var(--text-secondary); }

.import-dialog-shell { display: flex; flex-direction: column; height: 72vh; }
.import-dialog-scroll { flex: 1; min-height: 0; overflow-y: auto; padding: 2px; display: flex; flex-direction: column; }
.import-alert { margin-bottom: 14px; border-radius: var(--radius-md); border: none; }
.import-alert-body { font-size: 13px; color: #7c2d12; line-height: 1.7; }
.import-alert-strong { font-weight: 800; }
.import-dialog-stack { display: flex; flex-direction: column; gap: 12px; flex: 1; min-height: 0; }
.import-guide-title { font-size: 14px; font-weight: 700; color: var(--text-primary); margin: 6px 0 12px; }
.import-guide-title-spacer { margin-top: 6px; }
.import-guide-sub { margin-top: 8px; font-size: 13px; color: var(--text-placeholder); line-height: 1.6; }
.import-format-card { 
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%); 
    color: #e2e8f0; border-radius: var(--radius-md); 
    border: 1px solid rgba(102, 126, 234, 0.15);
    padding: 16px; 
    box-shadow: 0 8px 24px rgba(15, 23, 42, 0.15);
}
.import-format-line { font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace; font-size: 13px; line-height: 1.8; white-space: pre-wrap; }
.import-textarea-wrap { flex: 1; min-height: 0; display: flex; }
.import-textarea { flex: 1; display: flex; }
.import-textarea .el-textarea { flex: 1; display: flex; }
.import-textarea .el-textarea__inner { 
    flex: 1; height: 100% !important; min-height: 420px; 
    border-radius: var(--radius-md); padding: 14px; 
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace; font-size: 13px;
    border: 1px solid var(--border-color);
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
.import-textarea .el-textarea__inner:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.15);
}

.file-drop-zone {
    border: 2px dashed rgba(102, 126, 234, 0.4);
    border-radius: var(--radius-md);
    padding: 28px;
    margin-bottom: 14px;
    text-align: center;
    cursor: pointer;
    transition: all 0.25s ease;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.03) 0%, rgba(118, 75, 162, 0.03) 100%);
}
.file-drop-zone:hover { 
    border-color: var(--primary-color); 
    background: var(--active-gradient);
    box-shadow: 0 4px 16px rgba(102, 126, 234, 0.15);
    transform: translateY(-2px);
}
.file-drop-zone.is-dragging { 
    border-color: var(--primary-color); 
    background: var(--active-gradient);
    border-style: solid;
    box-shadow: var(--shadow-glow);
}

.drop-zone-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}
.drop-zone-icon { font-size: 36px; color: var(--primary-color); transition: all 0.2s ease; }
.file-drop-zone:hover .drop-zone-icon { transform: scale(1.1); }
.file-drop-zone.is-dragging .drop-zone-icon { transform: scale(1.15); }
.drop-zone-text { font-size: 15px; color: var(--text-primary); font-weight: 600; }
.drop-zone-hint { font-size: 13px; color: var(--text-placeholder); }

.manual-dialog-footer {
    padding: 16px 20px 18px;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    background: linear-gradient(180deg, rgba(248,250,252,0.8) 0%, rgba(248,250,252,1) 100%);
    position: relative;
    z-index: 10;
    margin-top: 0;
}
.manual-dialog-footer .el-button--primary {
    color: #fff;
    --el-button-text-color: #fff;
    --el-button-hover-text-color: #fff;
    --el-button-active-text-color: #fff;
    background: var(--primary-gradient);
    border-color: transparent;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
    transition: all 0.2s ease;
}
.manual-dialog-footer .el-button--primary:hover,
.manual-dialog-footer .el-button--primary:focus-visible {
    color: #fff;
    background: var(--primary-gradient-hover);
    border-color: transparent;
    transform: translateY(-1px);
    box-shadow: 0 6px 16px rgba(102, 126, 234, 0.4);
}

/* ================= 移动端 App UI 美化 ================= */
@media screen and (max-width: 768px) {
    .m-app-view { display: flex; flex-direction: column; height: 100vh; background: linear-gradient(180deg, #f8fafc 0%, #f1f5f9 100%); }
    
    .m-header {
        position: sticky;
        top: 0;
        z-index: 30;
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: calc(14px + env(safe-area-inset-top)) 20px 14px;
        background: rgba(255, 255, 255, 0.95);
        backdrop-filter: blur(12px);
        border-bottom: 1px solid var(--border-color);
        box-shadow: 0 2px 8px rgba(0,0,0,0.04);
    }
    .m-header h2 { margin: 0; font-size: 20px; font-weight: 800; color: var(--text-primary); letter-spacing: -0.5px; }
    .m-header-actions { font-size: 22px; color: var(--primary-color); }
    
    .m-body { flex: 1; overflow-y: auto; padding: 16px; }
    .m-card { 
        background: var(--bg-white); 
        border-radius: var(--radius-lg); 
        padding: 0 16px; 
        box-shadow: var(--shadow-card);
        border: 1px solid var(--border-color);
        margin-bottom: 20px; 
    }
    
    .m-group-header { display: flex; align-items: center; padding: 18px 0; border-bottom: 1px solid var(--border-color); cursor: pointer; }
    .m-group-icon { 
        width: 44px; height: 44px; 
        background: var(--primary-gradient);
        border-radius: var(--radius-md); 
        display: flex; justify-content: center; align-items: center; 
        color: #fff; font-size: 22px; margin-right: 16px;
        box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
    }
    .m-group-title { font-size: 17px; font-weight: 700; color: var(--text-primary); }
    .m-group-subtitle { font-size: 13px; color: var(--text-placeholder); margin-top: 3px; }
    .m-group-chevron { margin-left: auto; font-size: 14px; color: var(--text-placeholder); transition: transform 0.25s ease; }
    .m-group-chevron.is-collapsed { transform: rotate(-90deg); }
    
    .m-group-panel {
        border-bottom: 1px solid var(--border-color);
        padding: 8px 0;
    }
    .m-group-item {
        padding: 12px 0;
        font-size: 15px;
        color: var(--text-secondary);
        cursor: pointer;
        border-radius: var(--radius-sm);
        margin: 0 4px;
        padding-left: 8px;
        transition: all 0.15s ease;
    }
    .m-group-item:active { background: var(--hover-gradient); }
    .m-group-item.active {
        color: var(--primary-color);
        font-weight: 600;
        background: rgba(102, 126, 234, 0.08);
    }
    
    .m-item { display: flex; align-items: center; padding: 16px 0; border-bottom: 1px solid var(--border-color); cursor: pointer; border-radius: 0; transition: all 0.2s ease; }
    .m-item:last-child { border-bottom: none; }
    .m-item:active { background: var(--hover-gradient); }
    .m-avatar { 
        width: 50px; height: 50px; border-radius: 50%; 
        background: var(--primary-gradient);
        color: #fff; display: flex; justify-content: center; align-items: center; 
        font-size: 20px; font-weight: bold; margin-right: 16px; flex-shrink: 0;
        box-shadow: 0 4px 12px rgba(102, 126, 234, 0.25);
    }
    .m-info { flex: 1; min-width: 0; }
    .m-title { font-size: 15px; font-weight: 600; color: var(--text-primary); margin-bottom: 4px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
    .m-subtitle { font-size: 13px; color: var(--text-placeholder); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
    
    .m-status { display: flex; flex-direction: column; align-items: flex-end; gap: 8px; margin-left: 12px; }
    .m-dot { width: 10px; height: 10px; border-radius: 50%; }
    .dot-green { background: var(--success-gradient); box-shadow: 0 0 0 3px rgba(17, 153, 142, 0.15); }
    .dot-red { background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%); }
    .m-badge { 
        background: var(--primary-gradient); color: #fff; font-size: 12px; font-weight: 700; 
        padding: 3px 10px; border-radius: 12px; min-width: 20px; text-align: center;
        box-shadow: 0 2px 8px rgba(102, 126, 234, 0.3);
    }
    
    .m-bottom-bar {
        background: rgba(255, 255, 255, 0.98);
        padding: 16px 20px calc(16px + env(safe-area-inset-bottom));
        border-top: 1px solid var(--border-color);
        display: flex;
        justify-content: space-between;
        align-items: center;
        box-shadow: 0 -4px 16px rgba(0,0,0,0.06);
        backdrop-filter: blur(12px);
    }
    .m-add-btn { 
        flex: 1; display: flex; justify-content: center; align-items: center; height: 50px; 
        background: var(--primary-gradient);
        color: white; border: none; border-radius: var(--radius-md); 
        font-size: 16px; font-weight: 600; margin-right: 14px; 
        box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
        transition: all 0.2s ease;
    }
    .m-add-btn:active { 
        transform: translateY(1px); 
        filter: brightness(0.95);
        box-shadow: 0 4px 14px rgba(102, 126, 234, 0.3);
    }
    .m-icon-btn { 
        width: 50px; height: 50px; 
        background: var(--bg-white); 
        border: 1px solid var(--border-color); 
        border-radius: var(--radius-md); 
        font-size: 22px; display: flex; justify-content: center; align-items: center; 
        color: var(--text-secondary);
        box-shadow: var(--shadow-sm);
        transition: all 0.2s ease;
    }
    .m-icon-btn:active { 
        transform: translateY(1px); 
        background: var(--hover-gradient);
    }
    
    .m-mail-list-view, .m-mail-detail-view { display: flex; flex-direction: column; height: 100vh; background: #fff; }
    .m-detail-back { 
        display: flex; align-items: center; padding: 16px 20px; 
        background: #fff; color: var(--primary-color); font-weight: 600; 
        border-bottom: 1px solid var(--border-color); cursor: pointer; font-size: 15px;
        transition: all 0.2s ease;
    }
    .m-detail-back:active { background: var(--hover-gradient); }
    .m-folder-tabs { display: flex; gap: 10px; padding: 14px 16px; border-bottom: 1px solid var(--border-color); background: #fff; }
    .m-folder-tabs .folder-tab { flex: 1; height: 36px; border-radius: var(--radius-md); }
    .pc-mail-list-items { flex: 1; background: #fff; }

    .m-mail-detail-view .pc-detail-header {
        padding: 20px;
    }
    .m-mail-detail-view .pc-detail-header::after {
        left: 20px;
        right: 20px;
    }

    .pull-to-refresh-wrapper {
        flex: 1;
        display: flex;
        flex-direction: column;
        overflow: hidden;
        position: relative;
    }
    .pull-indicator {
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        height: 44px;
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 8px;
        background: linear-gradient(180deg, rgba(248,250,252,0.98) 0%, rgba(248,250,252,0) 100%);
        z-index: 10;
        pointer-events: none;
    }
    .pull-icon {
        font-size: 18px;
        color: var(--primary-color);
        transition: transform 0.2s ease;
    }
    .pull-icon.spinning .el-icon {
        animation: spin 0.8s linear infinite;
    }
    .pull-text {
        font-size: 13px;
        color: var(--text-secondary);
        font-weight: 500;
    }

    .m-full-page-import {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: #fff;
        z-index: 2000;
        display: flex;
        flex-direction: column;
    }
    .import-mobile-header { padding-left: 12px; padding-right: 16px; }
    .import-mobile-back { font-size: 22px; color: #334155; margin-right: 12px; display: flex; align-items: center; }
    .import-mobile-title { font-size: 18px; margin: 0; font-weight: 800; color: #0f172a; letter-spacing: -0.3px; }
    .import-mobile-body { flex: 1; overflow-y: auto; padding: 16px 16px 20px; background: #fff; }
    .import-format-card-mobile { margin-top: 14px; margin-bottom: 14px; }
    .import-textarea-mobile .el-textarea__inner { font-size: 14px; border-radius: var(--radius-md); }
    .file-drop-zone-mobile {
        border: 2px dashed rgba(102, 126, 234, 0.4);
        border-radius: var(--radius-md);
        padding: 24px;
        margin-bottom: 14px;
        text-align: center;
        cursor: pointer;
        transition: all 0.25s ease;
        background: linear-gradient(135deg, rgba(102, 126, 234, 0.03) 0%, rgba(118, 75, 162, 0.03) 100%);
    }
    .file-drop-zone-mobile:hover { 
        border-color: var(--primary-color); 
        background: var(--active-gradient);
    }
    .file-drop-zone-mobile.is-dragging { 
        border-color: var(--primary-color); 
        background: var(--active-gradient);
        border-style: solid;
    }
    .import-mobile-footer {
        padding: 14px 16px calc(14px + env(safe-area-inset-bottom));
        border-top: 1px solid var(--border-color);
        display: flex;
        gap: 12px;
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(12px);
    }
    .import-mobile-footer .el-button--primary {
        color: #fff;
        --el-button-text-color: #fff;
        --el-button-hover-text-color: #fff;
        --el-button-active-text-color: #fff;
        background: var(--primary-gradient);
        border-color: transparent;
        box-shadow: 0 4px 12px rgba(102, 126, 234, 0.35);
    }

    .m-select-toolbar {
        display: flex;
        align-items: center;
        padding: 12px 0;
        border-bottom: 1px solid var(--border-color);
        gap: 12px;
    }
    .m-select-count {
        flex: 1;
        font-size: 14px;
        color: var(--primary-color);
        font-weight: 600;
    }
    .m-checkbox-wrap {
        margin-right: 12px;
        display: flex;
        align-items: center;
    }
    .m-item.m-item-selected {
        background: rgba(102, 126, 234, 0.08);
    }
    .m-item.m-item-selected .m-avatar {
        background: linear-gradient(135deg, #7c8ff5 0%, #a78bfa 100%);
    }
    .m-batch-bar {
        background: rgba(255, 255, 255, 0.98);
        padding: 12px 16px calc(12px + env(safe-area-inset-bottom));
        border-top: 1px solid var(--border-color);
        display: flex;
        gap: 10px;
        box-shadow: 0 -4px 16px rgba(0,0,0,0.08);
        backdrop-filter: blur(12px);
    }
    .m-batch-btn {
        flex: 1;
        height: 44px;
        border: none;
        border-radius: var(--radius-md);
        font-size: 14px;
        font-weight: 600;
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 6px;
        transition: all 0.2s ease;
    }
    .m-batch-btn:active {
        transform: translateY(1px);
        filter: brightness(0.95);
    }
    .m-batch-cancel {
        background: var(--bg-gray);
        color: var(--text-secondary);
        border: 1px solid var(--border-color);
    }
    .m-batch-group {
        background: var(--primary-gradient);
        color: #fff;
        box-shadow: 0 4px 14px rgba(102, 126, 234, 0.4);
    }
    .m-batch-delete {
        background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
        color: #fff;
        box-shadow: 0 4px 14px rgba(239, 68, 68, 0.4);
    }
}

.account-loading-icon {
    font-size: 16px !important;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-right: 8px;
    animation: spin 0.8s linear infinite;
    display: inline-flex;
    align-items: center;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* ================= API 文档弹窗 ================= */
.api-doc-body { padding: 4px; }
.api-doc-section {
    margin-bottom: 20px;
    padding: 16px;
    background: var(--bg-gray);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}
.api-doc-method {
    display: inline-block;
    font-size: 12px;
    font-weight: 700;
    padding: 2px 10px;
    border-radius: 4px;
    color: #fff;
    margin-right: 8px;
    vertical-align: middle;
}
.api-doc-method.get { background: #10b981; }
.api-doc-method.post { background: var(--primary-color); }
.api-doc-section code {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    vertical-align: middle;
}
.api-doc-pre {
    margin: 10px 0 0;
    padding: 12px;
    background: #0f172a;
    color: #e2e8f0;
    border-radius: var(--radius-sm);
    font-size: 13px;
    line-height: 1.6;
    overflow-x: auto;
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}