/* 课程练习页私有样式，按设计稿模块顺序排列*/

/* banner：背景图里已含标题和遮罩，按图片比例定高，不再叠 .page-banner 的遮罩（同合作名师页） */
.courses-banner { min-height: 0; padding: 0; aspect-ratio: 1920 / 428; background-image: url("/assets/images/courses/banner-bg.jpg"); }
.courses-banner::before { content: none; }

/* ---------- tabs 栏：吸顶在导航下方，--courses-sticky-top 由 JS 按导航实际高度设置 ----------
   距 banner 48 拆成 margin 32 + padding 16：吸顶时外边距不计，tab 文字离导航只剩 16，不会空出一大条白 */
.courses-tabs { position: sticky; top: var(--courses-sticky-top, 5rem); z-index: 1010; margin-top: 2rem; padding-top: 1rem; background: var(--dy-bg); transition: box-shadow 0.3s ease; }
.courses-tabs.is-stuck { box-shadow: 0 2px 12px rgba(23, 19, 69, 0.06); }
.courses-tabs-list { position: relative; display: grid; grid-template-columns: repeat(6, 1fr); border-bottom: 1px solid rgba(0, 0, 0, 0.08); }
.courses-tab { padding: 0 0.5rem 0.75rem; border: 0; background: none; color: #000; font-size: 1.25rem; line-height: 1.75rem; font-weight: 400; white-space: nowrap; transition: color 0.2s ease; }
.courses-tab:hover { color: var(--dy-violet); }
.courses-tab.active { color: #000; font-weight: 500; font-family: var(--dy-font-accent); }
.courses-tab:focus-visible { outline: 2px solid var(--dy-violet); outline-offset: -2px; border-radius: var(--dy-radius-sm); }
/* 选中下划线：一条，JS 设置宽度与位移，切换时滑过去 */
.courses-tabs-indicator { position: absolute; bottom: -1px; left: 0; width: calc(100% / 6); height: 3px; border-radius: 3px; background: var(--dy-violet); transition: transform 0.3s ease, width 0.3s ease; }

/* ---------- 面板 ---------- */
.courses-content { padding-bottom: var(--dy-section-gap); }
.courses-panel { padding-top: 3rem; }
.courses-panel:focus-visible { outline: none; }

/* 筛选：一行一个维度，chip 单选 */
.courses-filter { margin-bottom: 3rem; }
.courses-filter-row { display: flex; align-items: flex-start; gap: 0.75rem; }
.courses-filter-row + .courses-filter-row { margin-top: 2.25rem; }
/* 标签行高与 chip 同高，chip 折成多行时标签对齐第一行 */
.courses-filter dt { flex: none; margin: 0; color: #000; font-size: 1.125rem; font-weight: 500; line-height: 2.8125rem; }
.courses-filter dd { min-width: 0; margin: 0; }
.courses-filter ul { display: flex; flex-wrap: wrap; gap: 0.75rem; margin: 0; }

/* 面部瑜伽的分组标题 */
.courses-group-title { margin-bottom: 2.25rem; color: #000; font-size: clamp(1.375rem, 1.1rem + 0.6vw, 1.875rem); font-weight: 500; }
.courses-rows + .courses-group-title { margin-top: 5.5rem; }

/* 卡片公共：标签、简介 */
.courses-tags { display: flex; flex-wrap: wrap; gap: 0.5rem; margin: 0; }
/* 标签底色按设计稿 #5F54FF 16%：--dy-tag-bg（#F0EFFF）压在灰底卡片上几乎看不见 */
.courses-tags li { padding: 0 0.375rem; border-radius: var(--dy-radius-sm); background: rgba(95, 84, 255, 0.16); color: var(--dy-tag-text); font-size: 0.875rem; line-height: 1.375rem; }
.courses-tags-lg li { padding: 0 0.5rem; font-size: 1.125rem; line-height: 1.75rem; }
.courses-desc { display: -webkit-box; overflow: hidden; margin: 0; color: var(--dy-text-secondary); font-size: 0.875rem; line-height: 1.5rem; -webkit-box-orient: vertical; -webkit-line-clamp: 2; }

/* ---------- 横卡：计划、名师课堂、面部瑜伽计划。左文字、右封面 ---------- */
.courses-rows { display: grid; gap: 2.25rem; margin: 0; }
.courses-row-card { display: flex; overflow: hidden; height: 100%; border-radius: var(--dy-radius-lg); background: var(--dy-bg-soft); transition: transform 0.3s ease, box-shadow 0.3s ease; }
.courses-row-card.is-target { box-shadow: 0 0 0 2px var(--dy-primary), 0 8px 24px rgba(var(--dy-primary-rgb), 0.18); } /* ?course= 定位到的课程 */
.courses-row-card-body { display: flex; flex: 1; flex-direction: column; min-width: 0; padding: 2.125rem 4rem 2rem 3rem; }
.courses-row-card-head { display: flex; flex-wrap: wrap; align-items: center; gap: 0.5rem 0.75rem; }
.courses-row-card h3 { margin: 0; color: #000; font-size: 1.5rem; font-weight: 500; line-height: 2.25rem; }
.courses-row-card-coach { margin: 0.25rem 0 0; color: #000; font-size: 1.125rem; line-height: 1.75rem; }
.courses-meta { display: flex; gap: 1.5rem; margin: 0.25rem 0 0; color: var(--dy-text-secondary); font-size: 1.125rem; line-height: 1.75rem; }
.courses-meta .bi { margin-right: 0.375rem; font-size: 0.875rem; }
.courses-row-card .courses-desc { margin-top: auto; padding-top: 1rem; }
.courses-row-card-cover { flex: none; width: 364px; height: auto; aspect-ratio: 364 / 205; border-radius: var(--dy-radius-lg); object-fit: cover; transition: transform 0.4s ease; }

/* ---------- 竖卡：课程、冥想、面部瑜伽课程。三列，列距 36 ---------- */
.courses-grid { --bs-gutter-x: 2.25rem; --bs-gutter-y: 2.25rem; margin-bottom: 0; }
.courses-card { display: flex; flex-direction: column; overflow: hidden; height: 100%; border-radius: var(--dy-radius-lg); background: var(--dy-bg-soft); transition: transform 0.3s ease, box-shadow 0.3s ease; }
.courses-card-cover { position: relative; overflow: hidden; }
.courses-card-cover img { display: block; width: 100%; height: auto; aspect-ratio: 456 / 257; object-fit: cover; transition: transform 0.4s ease; }
.courses-card-tall .courses-card-cover img { aspect-ratio: 456 / 306; }
/* 封面底部 60 高渐变，压时长和难度 */
.courses-card-bar { position: absolute; right: 0; bottom: 0; left: 0; display: flex; align-items: flex-end; gap: 1rem; height: 3.75rem; margin: 0; padding: 0 1.5rem 0.625rem; background: linear-gradient(0deg, rgba(0, 0, 0, 0.53), rgba(0, 0, 0, 0)); color: #fff; font-size: 1.125rem; line-height: 1.75rem; }
.courses-card-bar .bi { margin-right: 0.375rem; font-size: 0.875rem; }
.courses-card-body { display: flex; flex: 1; flex-direction: column; gap: 0.5rem; padding: 1.5rem 1.5rem 1.875rem; }
.courses-card h3 { margin: 0; color: #000; font-size: 1.5rem; font-weight: 500; line-height: 2.25rem; }
.courses-card-coach { margin: auto 0 0; padding-top: 0.5rem; color: var(--dy-text-secondary); font-size: 0.875rem; line-height: 1.25rem; }

/* ---------- 训练营卡：两列，白底细边框，封面 16:9（封面里压了标题） ---------- */
.courses-camp { overflow: hidden; height: 100%; border: 1px solid rgba(0, 0, 0, 0.08); border-radius: var(--dy-radius-lg); background: var(--dy-bg); transition: transform 0.3s ease, box-shadow 0.3s ease; }
.courses-camp img { display: block; width: 100%; height: auto; aspect-ratio: 16 / 9; object-fit: cover; transition: transform 0.4s ease; }
.courses-camp .courses-desc { position: relative; padding: 1.25rem 1.875rem 1.5rem; background: var(--dy-bg); }

/* 悬停：上浮 + 阴影 + 封面轻放大。只在有鼠标的设备上生效 */
@media (hover: hover) {
  .courses-row-card:hover, .courses-card:hover, .courses-camp:hover { transform: translateY(-4px); box-shadow: 0 12px 32px rgba(23, 19, 69, 0.1); }
  .courses-row-card:hover .courses-row-card-cover, .courses-card:hover .courses-card-cover img, .courses-camp:hover img { transform: scale(1.04); }
}
@media (prefers-reduced-motion: reduce) {
  .courses-tabs, .courses-tabs-indicator, .courses-row-card, .courses-card, .courses-camp, .courses-page img { transition: none; }
}

/* JS 追加的卡片淡入 */
.courses-enter { animation: courses-fade-up 0.4s ease both; }
@keyframes courses-fade-up {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: none; }
}

/* 查看更多、空状态 */
.courses-more { margin-top: 3rem; text-align: center; }
.courses-more .btn { min-width: 10rem; padding: 0.625rem 2rem; }
.courses-more .bi { margin-left: 0.375rem; }
.courses-more .btn:disabled { opacity: 0.6; }
.courses-empty { padding: 5rem 0; color: var(--dy-text-secondary); text-align: center; }

/* ---------- 平板：横卡封面缩小 ---------- */
@media (max-width: 1199.98px) {
  .courses-row-card-cover { width: 300px; }
  .courses-row-card-body { padding-right: 2rem; }
}

/* ---------- 手机、竖屏平板：tab 与 chip 横向滑动，横卡改上图下文 ---------- */
@media (max-width: 991.98px) {
  .courses-banner { aspect-ratio: auto; min-height: 180px; background-size: auto 100%; }
  .courses-tabs { margin-top: 0.5rem; padding-top: 0.75rem; }
  .courses-tabs-list { display: flex; overflow-x: auto; scrollbar-width: none; }
  .courses-tabs-list::-webkit-scrollbar { display: none; }
  .courses-tab { flex: none; padding: 0 1rem 0.625rem; font-size: 1rem; line-height: 1.5rem; }
  .courses-panel { padding-top: 1.5rem; }
  .courses-filter { margin-bottom: 1.5rem; }
  .courses-filter-row + .courses-filter-row { margin-top: 1rem; }
  .courses-filter dt { font-size: 0.875rem; line-height: calc(2.25rem + 4px); }
  .courses-filter ul { flex-wrap: nowrap; overflow-x: auto; gap: 0.5rem; padding: 2px 1px; scrollbar-width: none; }
  .courses-filter ul::-webkit-scrollbar { display: none; }
  .courses-rows { gap: 1.25rem; }
  .courses-grid { --bs-gutter-x: 1.25rem; --bs-gutter-y: 1.25rem; }
  .courses-rows + .courses-group-title { margin-top: 3rem; }
  .courses-group-title { margin-bottom: 1.25rem; }
}
@media (max-width: 767.98px) {
  .courses-row-card { flex-direction: column; }
  .courses-row-card-cover { order: -1; width: 100%; }
  .courses-row-card-body { padding: 1rem 1.25rem 1.25rem; }
  .courses-row-card h3, .courses-card h3 { font-size: 1.125rem; line-height: 1.75rem; }
  .courses-tags-lg li { font-size: 0.75rem; line-height: 1.375rem; }
  .courses-meta, .courses-row-card-coach { font-size: 0.875rem; line-height: 1.5rem; }
  .courses-row-card .courses-desc { padding-top: 0.5rem; }
  .courses-card-bar { height: 3rem; padding: 0 1rem 0.5rem; font-size: 0.875rem; }
  .courses-card-body { padding: 1rem 1.25rem 1.25rem; }
  .courses-camp .courses-desc { padding: 1rem 1.25rem; }
  .courses-more { margin-top: 2rem; }
}