/* ============================================
   混合方案 E - 渐进增强版
   不改动原有 DOM，仅通过 CSS 调整布局
   版本：v4.0 | 零风险实现三栏效果
   ============================================ */

/* ===== 桌面端布局优化（≥992px） ===== */
@media (min-width: 992px) {
  /* 左侧 Tab 浮动定位 */
  .hv-left-nav-modern {
    position: sticky;
    top: calc(var(--hv-space-lg) + 12px);
    width: 260px;
    height: fit-content;
    z-index: 5;
    margin-right: 16px;
    float: left;
  }
  
  /* 主布局调整：左缩右扩 */
  .hv-ch-layout {
    display: grid !important;
    grid-template-columns: 260px minmax(0, 1fr) auto !important;
    gap: 16px !important;
    align-items: start !important;
    overflow: hidden;
  }
  
  /* 现有侧栏调整为右栏 Sticky */
  .hv-ch-side {
    width: 320px;
    order: 3;
  }
}

/* Tablet/Mobile：保持单列，Tab 横滑胶囊化 */
@media (max-width: 992px) {
  .hv-left-nav-modern {
    position: relative;
    width: 100%;
    margin-bottom: 16px;
    float: none !important;
  }
  
  /* 主布局恢复单列 */
  .hv-ch-layout {
    grid-template-columns: 1fr !important;
  }
  
  /* Tab 改为水平胶囊 */
  .hv-ch-tabs-modern {
    display: flex;
    overflow-x: auto;
    gap: 8px;
    padding: 8px;
    white-space: nowrap;
    scroll-snap-type: x mandatory;
    background: var(--hv-bg-card);
    border: 1px solid var(--hv-border);
    border-radius: var(--hv-radius-lg);
    box-shadow: var(--hv-shadow-sm);
    -webkit-overflow-scrolling: touch;
  }
  
  /* Scrollbar 美化 */
  .hv-ch-tabs-modern::-webkit-scrollbar {
    height: 4px;
  }
  
  .hv-ch-tabs-modern::-webkit-scrollbar-thumb {
    background: var(--hv-border);
    border-radius: 2px;
  }
  
  .hv-ch-tabs-modern::-webkit-scrollbar-track {
    background: transparent;
  }
  
  /* Tab 卡片样式 */
  .hv-ch-tab-item-modern {
    flex: none;
    padding: 10px 14px;
    font-size: 14px;
    font-weight: 600;
    color: var(--hv-text-body);
    background: var(--hv-bg-hover);
    border: 1px solid var(--hv-border);
    border-radius: var(--hv-radius-full);
    text-decoration: none;
    transition: all .2s ease;
    cursor: pointer;
    scroll-snap-align: start;
    display: inline-flex;
    align-items: center;
    gap: 6px;
  }
  
  .hv-ch-tab-item-modern svg {
    flex-shrink: 0;
  }
  
  .hv-ch-tab-item-modern:hover {
    background: var(--hv-primary-bg);
    color: var(--hv-primary);
    border-color: var(--hv-primary);
    transform: translateY(-1px);
  }
  
  .hv-ch-tab-item-modern.active {
    background: linear-gradient(135deg,var(--hv-primary),var(--hv-primary-light));
    color: #fff;
    border-color: var(--hv-primary);
    box-shadow: 0 4px 12px rgba(27,58,95,.25);
  }
  
  /* 徽章计数 */
  .hv-badge-count {
    font-size: 11px;
    padding: 2px 8px;
    border-radius: var(--hv-radius-full);
    background: linear-gradient(135deg,#DC2626,#EF4444);
    color: #fff;
    font-weight: 700;
    white-space: nowrap;
  }
}

/* Mobile (<768px) */
@media (max-width: 768px) {
  .hv-ch-tabs-modern {
    padding: 6px;
    gap: 6px;
  }
  
  .hv-ch-tab-item-modern {
    padding: 8px 12px;
    font-size: 13px;
  }
}

/* ===== 瀑布流卡片样式（复用现有 .hv-article-item） ===== */

.hv-wf-card {
  columns: span 1 / 1fr 1fr 1fr !important;
  break-inside: avoid;
  margin-bottom: 16px !important;
}

/* 响应式断点 */
@media (max-width: 1200px) {
  .hv-waterfall-grid-responsive {
    columns: 1fr 1fr !important;
  }
}

@media (max-width: 768px) {
  .hv-waterfall-grid-responsive {
    columns: 1fr !important;
  }
}

/* ===== 精选徽章 ===== */
/* 首篇卡片需 relative 定位以承载徽章 */
.hv-article-item.featured {
  position: relative;
  border-color: var(--hv-primary-border);
}

.hv-article-item.featured::after {
  content: '精选';
  position: absolute;
  top: 10px;
  right: 10px;
  padding: 3px 12px;
  background: linear-gradient(135deg,var(--hv-accent),var(--hv-accent-dark));
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  border-radius: var(--hv-radius-full);
  box-shadow: 0 2px 8px rgba(201,168,76,.4);
  z-index: 2;
  letter-spacing: 1px;
}

/* 无图精选卡片：留出徽章空间避免遮挡标题 */
.hv-article-item.featured.no-thumb .hv-article-main {
  padding-right: 0;
}

@media (max-width: 768px) {
  .hv-article-item.featured::after {
    top: 8px;
    right: 8px;
    padding: 2px 10px;
  }
}

/* ===== 懒加载哨兵动画 ===== */
.hv-wf-sentinel {
  min-height: 56px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 12px 0;
}

.hv-wf-sentinel:empty {
  min-height: 0;
  padding: 0;
}

.hv-sentinel-icon {
  width: 32px;
  height: 32px;
  border: 3px solid var(--hv-border, #E2E8F0);
  border-top-color: var(--hv-primary, #1B3A5F);
  border-radius: 50%;
  animation: hv-sentinel-spin .8s linear infinite;
}

@keyframes hv-sentinel-spin {
  to { transform: rotate(360deg); }
}

/* 移动端触摸反馈：卡片按压态 */
@media (max-width: 768px) {
  .hv-article-item {
    -webkit-tap-highlight-color: transparent;
    transition: transform .15s ease;
  }
  
  .hv-article-item:active {
    transform: scale(.98);
  }
}

/* ===== 分类标签美化 ===== */
.hv-article-cat-modern {
  display: inline-block;
  font-size: 11px;
  padding: 2px 8px;
  border-radius: var(--hv-radius-full);
  background: var(--hv-primary-bg);
  color: var(--hv-primary);
  border: 1px solid var(--hv-primary-border);
  margin-bottom: 8px;
  font-weight: 600;
  text-decoration: none;
  transition: all .2s;
}

.hv-article-cat-modern:hover {
  background: var(--hv-primary);
  color: #fff;
  border-color: var(--hv-primary);
}