/* ═══════════════════════════════════════════════
   Element Plus 后台管理问答平台 - 设计系统
   主色 #409EFF，标准 Element 圆角样式
   ═══════════════════════════════════════════════ */

/* ── Element Plus Design Tokens ── */
:root {
  --el-primary: #409EFF;
  --el-primary-hover: #79BBFF;
  --el-primary-active: #3A8EE6;
  --el-primary-bg: rgba(64,158,255,0.08);
  --el-primary-border: rgba(64,158,255,0.3);
  
  --el-success: #67C23A;
  --el-warning: #E6A23C;
  --el-danger: #F56C6C;
  --el-info: #909399;
  
  --el-text-primary: #303133;
  --el-text-regular: #606266;
  --el-text-secondary: #909399;
  --el-text-placeholder: #C0C4CC;
  
  --el-bg: #F5F7FA;
  --el-bg-white: #FFFFFF;
  --el-bg-page: #EDEFF2;
  --el-bg-overlay: #FFFFFF;
  
  --el-border: #DCDFE6;
  --el-border-light: #E4E7ED;
  --el-border-lighter: #EBEEF5;
  --el-border-extra-light: #F2F6FC;
  
  --el-radius: 4px;
  --el-radius-base: 4px;
  --el-radius-round: 20px;
  --el-radius-circle: 50%;
  
  --el-shadow: 0 2px 12px 0 rgba(0,0,0,0.06);
  --el-shadow-light: 0 2px 4px rgba(0,0,0,0.04), 0 2px 8px rgba(0,0,0,0.06);
  --el-shadow-dark: 0 4px 16px rgba(0,0,0,0.08);
  --el-shadow-menu: 0 2px 8px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  
  --el-font: "Helvetica Neue", Helvetica, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "微软雅黑", Arial, sans-serif;
  --el-font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  
  --el-header-height: 60px;
  --el-sider-width: 210px;
  --el-sider-collapsed: 64px;
  --el-transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ── Global Reset ── */
* { box-sizing: border-box; }

body {
  font-family: var(--el-font);
  background: var(--el-bg);
  color: var(--el-text-primary);
  font-size: 14px;
  line-height: 1.5715;
  margin: 0;
  padding: 0;
  -webkit-font-smoothing: antialiased;
}

/* ── Management Layout ── */
.el-container {
  display: flex;
  flex-direction: row;
  min-height: 100vh;
  width: 100%;
}

/* ── Sider ── */
.el-aside {
  position: fixed;
  left: 0;
  top: 0;
  bottom: 0;
  width: var(--el-sider-width);
  background: #1F2D3D;
  color: #BFCFE0;
  z-index: 100;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transition: width var(--el-transition);
  box-shadow: 2px 0 6px rgba(0,0,0,0.08);
}

.el-aside .el-logo {
  height: var(--el-header-height);
  display: flex;
  align-items: center;
  padding: 0 18px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  flex-shrink: 0;
  gap: 10px;
}

.el-aside .el-logo a {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #FFFFFF;
  text-decoration: none;
  font-size: 16px;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.el-aside .el-logo a i {
  font-size: 22px;
  color: var(--el-primary);
}

/* ── el-menu (vertical) ── */
.el-menu {
  flex: 1;
  overflow-y: auto;
  padding: 6px 0;
  list-style: none;
  margin: 0;
}

.el-menu .el-menu-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 18px;
  height: 44px;
  margin: 2px 10px;
  border-radius: var(--el-radius);
  color: rgba(191,207,224,0.8);
  text-decoration: none;
  font-size: 14px;
  cursor: pointer;
  transition: all 0.15s;
  position: relative;
  white-space: nowrap;
  overflow: hidden;
}

.el-menu .el-menu-item:hover {
  background: rgba(255,255,255,0.06);
  color: #FFFFFF;
}

.el-menu .el-menu-item.is-active {
  background: var(--el-primary);
  color: #FFFFFF;
  font-weight: 500;
}

.el-menu .el-menu-item i {
  width: 16px;
  text-align: center;
  font-size: 14px;
  flex-shrink: 0;
}

.el-menu .el-menu-item .el-badge {
  margin-left: auto;
  background: var(--el-danger);
  color: #fff;
  font-size: 11px;
  padding: 0 6px;
  height: 18px;
  display: flex;
  align-items: center;
  border-radius: 9px;
  font-weight: 500;
}

.el-menu .el-menu-item-group__title {
  padding: 10px 18px 4px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: rgba(191,207,224,0.35);
}

/* ── Header ── */
.el-header {
  height: var(--el-header-height);
  background: var(--el-bg-white);
  border-bottom: 1px solid var(--el-border-lighter);
  display: flex;
  align-items: center;
  padding: 0 20px;
  position: sticky;
  top: 0;
  z-index: 99;
  box-shadow: var(--el-shadow-menu);
  margin-left: var(--el-sider-width);
  transition: margin-left var(--el-transition);
}

.el-header-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.el-header-left .el-menu-toggle {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--el-radius);
  border: none;
  background: transparent;
  color: var(--el-text-regular);
  font-size: 18px;
  cursor: pointer;
  transition: all 0.15s;
}

.el-header-left .el-menu-toggle:hover {
  background: var(--el-primary-bg);
  color: var(--el-primary);
}

/* ── el-breadcrumb ── */
.el-breadcrumb {
  font-size: 14px;
  display: flex;
  align-items: center;
  gap: 0;
}

.el-breadcrumb ol {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  align-items: center;
}

.el-breadcrumb li { list-style: none; }

.el-breadcrumb .el-breadcrumb__inner {
  color: var(--el-text-secondary);
  text-decoration: none;
  font-size: 13px;
}

.el-breadcrumb .el-breadcrumb__inner a {
  color: var(--el-text-secondary);
  text-decoration: none;
  transition: color 0.15s;
}

.el-breadcrumb .el-breadcrumb__inner a:hover {
  color: var(--el-primary);
}

.el-breadcrumb .el-breadcrumb__separator {
  margin: 0 8px;
  color: var(--el-text-placeholder);
  font-size: 12px;
}

.el-breadcrumb li:last-child .el-breadcrumb__inner {
  color: var(--el-text-regular);
  font-weight: 500;
}

/* ── Header Center (搜索) ── */
.el-header-center {
  flex: 1;
  display: flex;
  justify-content: center;
  padding: 0 30px;
}

.el-input {
  position: relative;
  display: inline-flex;
  align-items: center;
  width: 100%;
  max-width: 360px;
}

.el-input__inner {
  width: 100%;
  height: 36px;
  padding: 0 36px 0 14px;
  border: 1px solid var(--el-border);
  border-radius: var(--el-radius-base);
  background: var(--el-bg);
  font-size: 13px;
  color: var(--el-text-primary);
  outline: none;
  transition: all 0.15s;
  font-family: var(--el-font);
}

.el-input__inner:focus {
  border-color: var(--el-primary);
  background: var(--el-bg-white);
  box-shadow: 0 0 0 2px var(--el-primary-bg);
}

.el-input__inner::placeholder { color: var(--el-text-placeholder); }

.el-input__suffix {
  position: absolute;
  right: 1px;
  top: 1px;
  bottom: 1px;
  display: flex;
  align-items: center;
  padding: 0 10px;
}

.el-input__suffix .el-icon-search {
  color: var(--el-text-secondary);
  font-size: 14px;
  cursor: pointer;
  transition: color 0.15s;
}

.el-input__suffix .el-icon-search:hover { color: var(--el-primary); }

/* ── Header Right ── */
.el-header-right {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
}

.el-header-right .el-header-btn {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--el-radius);
  border: none;
  background: transparent;
  color: var(--el-text-regular);
  font-size: 16px;
  cursor: pointer;
  transition: all 0.15s;
  position: relative;
}

.el-header-right .el-header-btn:hover {
  background: var(--el-bg);
  color: var(--el-primary);
}

.el-header-right .el-header-btn .el-dot {
  position: absolute;
  top: 6px;
  right: 6px;
  width: 6px;
  height: 6px;
  background: var(--el-danger);
  border-radius: 50%;
  border: 1px solid var(--el-bg-white);
}

.el-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--el-primary-bg);
  color: var(--el-primary);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s;
  flex-shrink: 0;
  overflow: hidden;
}

.el-avatar img { width: 100%; height: 100%; object-fit: cover; }

.el-avatar:hover { box-shadow: 0 0 0 2px var(--el-primary-border); }

/* ── Main Content ── */
.el-main {
  margin-left: var(--el-sider-width);
  padding: 20px;
  min-height: calc(100vh - var(--el-header-height));
  background: var(--el-bg);
  transition: margin-left var(--el-transition);
}

/* ── el-row / el-col ── */
.el-row {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.el-col-16 {
  flex: 0 0 calc(66.666% - 8px);
  max-width: calc(66.666% - 8px);
}

.el-col-8 {
  flex: 0 0 calc(33.333% - 8px);
  max-width: calc(33.333% - 8px);
}

/* ── el-card ── */
.el-card {
  background: var(--el-bg-white);
  border-radius: var(--el-radius-base);
  border: 1px solid var(--el-border-lighter);
  transition: box-shadow var(--el-transition);
  margin-bottom: 16px;
  overflow: hidden;
}

.el-card:hover { box-shadow: var(--el-shadow); }

.el-card__header {
  padding: 14px 20px;
  border-bottom: 1px solid var(--el-border-extra-light);
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 15px;
  font-weight: 500;
  color: var(--el-text-primary);
  min-height: 48px;
}

.el-card__header i { color: var(--el-primary); font-size: 15px; }

.el-card__header .el-card__extra {
  margin-left: auto;
  font-size: 12px;
  color: var(--el-primary);
  cursor: pointer;
}

.el-card__body { padding: 18px 20px; }

/* ── el-table (styled list) ── */
.el-table {
  width: 100%;
  font-size: 14px;
  color: var(--el-text-regular);
}

.el-table__row {
  display: flex;
  align-items: flex-start;
  padding: 14px 20px;
  border-bottom: 1px solid var(--el-border-extra-light);
  gap: 14px;
  transition: background 0.15s;
}

.el-table__row:last-child { border-bottom: none; }

.el-table__row:hover { background: var(--el-bg); }

.el-table__row .el-cell { flex: 1; min-width: 0; }

.el-table__row .el-cell-title {
  font-size: 14px;
  font-weight: 500;
  color: var(--el-text-primary);
  line-height: 1.5;
  margin-bottom: 4px;
}

.el-table__row .el-cell-title a {
  color: var(--el-text-primary);
  text-decoration: none;
  transition: color 0.15s;
}

.el-table__row .el-cell-title a:hover { color: var(--el-primary); }

.el-table__row .el-cell-desc {
  font-size: 13px;
  color: var(--el-text-secondary);
  line-height: 1.6;
  margin-bottom: 6px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.el-table__row .el-cell-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 14px;
  font-size: 12px;
  color: var(--el-text-secondary);
}

.el-table__row .el-cell-meta span {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.el-table__row .el-table__tag {
  flex-shrink: 0;
  margin-top: 2px;
}

/* ── el-tag ── */
.el-tag {
  display: inline-flex;
  align-items: center;
  padding: 0 8px;
  height: 24px;
  font-size: 12px;
  border-radius: var(--el-radius-base);
  border: 1px solid var(--el-border);
  background: var(--el-bg);
  color: var(--el-text-regular);
  white-space: nowrap;
  line-height: 1;
  gap: 4px;
}

.el-tag--primary {
  background: var(--el-primary-bg);
  border-color: var(--el-primary-border);
  color: var(--el-primary);
}

.el-tag--success {
  background: rgba(103,194,58,0.08);
  border-color: rgba(103,194,58,0.3);
  color: var(--el-success);
}

.el-tag--warning {
  background: rgba(230,162,60,0.08);
  border-color: rgba(230,162,60,0.3);
  color: #E6A23C;
}

.el-tag--danger {
  background: rgba(245,108,108,0.08);
  border-color: rgba(245,108,108,0.3);
  color: var(--el-danger);
}

.el-tag--info {
  background: rgba(144,147,153,0.08);
  border-color: rgba(144,147,153,0.3);
  color: var(--el-info);
}

/* ── el-pagination ── */
.el-pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  padding: 18px 0;
  font-size: 13px;
  white-space: nowrap;
}

.el-pagination .el-pager {
  display: flex;
  align-items: center;
  gap: 4px;
}

.el-pagination .el-pager .number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 32px;
  height: 32px;
  padding: 0 6px;
  border: 1px solid var(--el-border-light);
  border-radius: var(--el-radius-base);
  background: var(--el-bg-white);
  color: var(--el-text-regular);
  cursor: pointer;
  transition: all 0.15s;
  text-decoration: none;
  font-size: 13px;
}

.el-pagination .el-pager .number:hover {
  color: var(--el-primary);
  border-color: var(--el-primary);
}

.el-pagination .el-pager .number.active {
  background: var(--el-primary);
  border-color: var(--el-primary);
  color: #FFFFFF;
  font-weight: 500;
}

.el-pagination .el-pager .number.disabled {
  color: var(--el-text-placeholder);
  cursor: not-allowed;
  border-color: var(--el-border-light);
}

.el-pagination .btn-prev,
.el-pagination .btn-next {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 32px;
  height: 32px;
  border: 1px solid var(--el-border-light);
  border-radius: var(--el-radius-base);
  background: var(--el-bg-white);
  color: var(--el-text-regular);
  cursor: pointer;
  transition: all 0.15s;
  text-decoration: none;
  font-size: 12px;
}

.el-pagination .btn-prev:hover,
.el-pagination .btn-next:hover {
  color: var(--el-primary);
  border-color: var(--el-primary);
}

.el-pagination .btn-prev.disabled,
.el-pagination .btn-next.disabled {
  color: var(--el-text-placeholder);
  cursor: not-allowed;
}

.el-pagination .el-pagination__total {
  color: var(--el-text-secondary);
  font-size: 13px;
  margin: 0 8px;
}

/* ── Sidebar List ── */
.el-sidebar-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.el-sidebar-list .el-sidebar-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 10px 0;
  border-bottom: 1px solid var(--el-border-extra-light);
}

.el-sidebar-list .el-sidebar-item:last-child { border-bottom: none; }

.el-sidebar-list .el-sidebar-item .el-rank {
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--el-radius-base);
  font-size: 11px;
  font-weight: 600;
  flex-shrink: 0;
  margin-top: 1px;
}

.el-sidebar-list .el-sidebar-item .el-rank.top1 { background: #F56C6C; color: #fff; }
.el-sidebar-list .el-sidebar-item .el-rank.top2 { background: #E6A23C; color: #fff; }
.el-sidebar-list .el-sidebar-item .el-rank.top3 { background: #909399; color: #fff; }
.el-sidebar-list .el-sidebar-item .el-rank.normal { background: var(--el-bg); color: var(--el-text-secondary); }

.el-sidebar-list .el-sidebar-item .el-rank-text {
  flex: 1;
  min-width: 0;
}

.el-sidebar-list .el-sidebar-item .el-rank-text a {
  color: var(--el-text-regular);
  text-decoration: none;
  font-size: 13px;
  line-height: 1.5;
  transition: color 0.15s;
  display: block;
}

.el-sidebar-list .el-sidebar-item .el-rank-text a:hover { color: var(--el-primary); }

.el-sidebar-list .el-sidebar-item .el-rank-meta {
  font-size: 11px;
  color: var(--el-text-placeholder);
  margin-top: 2px;
}

/* ── Article Content ── */
.el-article-content {
  font-size: 14px;
  line-height: 1.8;
  color: var(--el-text-regular);
}

.el-article-content p { margin-bottom: 1em; }

.el-article-content img {
  max-width: 100%;
  border-radius: var(--el-radius-base);
  margin: 14px 0;
}

/* ── Comment / Answer ── */
.el-comment {
  display: flex;
  gap: 12px;
  padding: 14px 0;
  border-bottom: 1px solid var(--el-border-extra-light);
  transition: background 0.15s;
}

.el-comment:last-child { border-bottom: none; }

.el-comment .el-avatar-sm {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  flex-shrink: 0;
  background: var(--el-primary-bg);
  overflow: hidden;
}

.el-comment .el-avatar-sm img { width: 100%; height: 100%; object-fit: cover; }

.el-comment .el-comment-body { flex: 1; min-width: 0; }

.el-comment .el-comment-author {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 4px;
}

.el-comment .el-comment-author .name {
  font-size: 14px;
  font-weight: 500;
  color: var(--el-text-primary);
}

.el-comment .el-comment-author .time {
  font-size: 12px;
  color: var(--el-text-placeholder);
}

.el-comment .el-comment-text {
  font-size: 14px;
  color: var(--el-text-regular);
  line-height: 1.6;
}

.el-comment .el-comment-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 6px;
  font-size: 12px;
}

.el-comment .el-comment-actions button {
  border: none;
  background: none;
  cursor: pointer;
  color: var(--el-text-secondary);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 6px;
  border-radius: var(--el-radius-base);
  font-size: 12px;
  transition: all 0.15s;
}

.el-comment .el-comment-actions button:hover {
  color: var(--el-primary);
  background: var(--el-primary-bg);
}

/* ── Footer ── */
.el-footer {
  margin-left: var(--el-sider-width);
  text-align: center;
  padding: 16px 20px;
  font-size: 13px;
  color: var(--el-text-secondary);
  border-top: 1px solid var(--el-border-lighter);
  background: var(--el-bg-white);
  transition: margin-left var(--el-transition);
}

/* ── Responsive ── */
@media (max-width: 991px) {
  .el-col-16, .el-col-8 {
    flex: 0 0 100%;
    max-width: 100%;
  }
}

@media (max-width: 768px) {
  .el-aside { width: 0 !important; overflow: hidden; }
  .el-header { margin-left: 0; }
  .el-main { margin-left: 0; padding: 14px; }
  .el-footer { margin-left: 0; }
  .el-header-center { display: none; }
}

/* ── Focus States ── */
:focus-visible {
  outline: 2px solid var(--el-primary);
  outline-offset: 1px;
}

/* ── Reduced Motion ── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--el-border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--el-text-placeholder); }

/* ─── Statistic ─── */
.el-statistic {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  padding: 8px 12px;
}

.el-statistic .el-statistic-value {
  font-size: 22px;
  font-weight: 600;
  color: var(--el-text-primary);
  line-height: 1.3;
}

.el-statistic .el-statistic-label {
  font-size: 12px;
  color: var(--el-text-secondary);
  line-height: 1.3;
  margin-top: 2px;
}