/* ============================================================
   项目列表页
   ------------------------------------------------------------
   结构对齐公司官网 cases 页：
   hero / toolbar / filter-drawer / result-bar / grid / pagination
   保留本地能力：离线包下载、年份筛选、列表视图字段
   ============================================================ */

.cases-hero {
  padding: clamp(52px, 7vw, 88px) 0 clamp(18px, 2.8vw, 34px);
}

.cases-hero__inner { display: block; }

.page-title.cases-hero__title {
  max-width: min(980px, 100%);
  font-size: var(--text-page-title);
  line-height: var(--leading-tight);
  letter-spacing: -.045em;
}

.cases-index-section {
  padding: clamp(18px, 3vw, 40px) 0 clamp(82px, 10vw, 132px);
}

.cases-explorer {
  display: grid;
  gap: clamp(22px, 3vw, 36px);
}

/* ---------- 工具栏 ---------- */

.cases-toolbar {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: minmax(280px, 1fr) auto;
  gap: clamp(16px, 2vw, 28px);
  align-items: end;
}

.cases-toolbar__search {
  display: grid;
  gap: var(--space-2);
  min-width: 0;
}

.cases-toolbar__search label {
  color: var(--color-text-muted);
  font-size: var(--text-xs);
  font-weight: 700;
  line-height: 1;
  letter-spacing: .12em;
}

.cases-toolbar__search input {
  width: 100%;
  min-height: 48px;
  border: 0;
  border-bottom: 1px solid var(--color-line);
  padding: 0 var(--space-8) 0 0;
  background: transparent;
  color: var(--color-text);
  font-size: var(--text-md);
  outline: 0;
  transition: border-color var(--duration-fast) ease;
}

.cases-toolbar__search input::placeholder { color: var(--color-text-faint); }
.cases-toolbar__search:focus-within input { border-color: var(--color-text); }

.cases-toolbar__actions {
  position: relative;
  display: flex;
  align-items: end;
  justify-content: flex-end;
  gap: var(--space-3);
}

.cases-filter-panel { position: relative; }

.cases-filter-toggle,
.cases-view,
.cases-star-toggle,
.cases-reset,
.cases-pagination button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  border: 1px solid var(--color-line);
  background: transparent;
  color: var(--color-text-medium);
  font-size: var(--text-sm);
  line-height: 1;
  transition: color var(--duration-fast) ease, border-color var(--duration-fast) ease, background-color var(--duration-fast) ease;
}

.cases-filter-toggle {
  gap: var(--space-2);
  min-width: 132px;
  padding: 0 var(--space-4);
}

.cases-filter-toggle__text {
  overflow: hidden;
  max-width: 8em;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.cases-toolbar__view {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}

.cases-view {
  width: 48px;
  padding: 0;
}

/* 只看收藏开关（与视图切换同组样式） */
.cases-star-toggle {
  gap: var(--space-2);
  padding: 0 var(--space-4);
}

.cases-star-toggle .cases-icon svg {
  fill: none;
  transition: fill var(--duration-fast) ease;
}

.cases-star-toggle:hover .cases-icon svg,
.cases-star-toggle:focus-visible .cases-icon svg {
  fill: currentColor;
}

.cases-star-toggle.is-active {
  border-color: var(--color-text);
  background: var(--color-text);
  color: var(--color-white);
}

.cases-star-toggle.is-active .cases-icon svg { fill: currentColor; }

.cases-icon {
  display: inline-flex;
  width: 18px;
  height: 18px;
  align-items: center;
  justify-content: center;
}

.cases-icon svg {
  width: 100%;
  height: 100%;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.7;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.cases-filter-toggle:hover,
.cases-filter-toggle:focus-visible,
.cases-filter-toggle[aria-expanded='true'],
.cases-view:hover,
.cases-view:focus-visible,
.cases-view.is-active,
.cases-reset:hover,
.cases-reset:focus-visible,
.cases-pagination button:hover,
.cases-pagination button:focus-visible {
  border-color: var(--color-text);
  background: var(--color-text);
  color: var(--color-white);
}

/* ---------- 筛选抽屉 ---------- */

.cases-filter-drawer {
  display: grid;
  gap: clamp(20px, 2.6vw, 34px);
  overflow: hidden;
  padding: clamp(12px, 2vw, 24px) 0 clamp(6px, 1.2vw, 14px);
  will-change: height, opacity, transform;
  transition: height 360ms var(--ease-carousel),
    opacity 300ms ease,
    transform 360ms var(--ease-carousel);
}

.cases-filter-drawer[hidden] { display: none; }
.cases-filter-drawer.is-animating { pointer-events: none; }

.cases-filter-drawer__head {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.cases-filter-drawer__head .cases-filter {
  flex: 0 0 auto;
  min-width: 104px;
}

.cases-filter-group {
  display: grid;
  grid-template-columns: minmax(120px, .16fr) minmax(0, 1fr);
  gap: clamp(14px, 2.4vw, 32px);
  align-items: start;
}

.cases-filter-group__title {
  margin: 0;
  padding-top: 13px;
  color: var(--color-text-muted);
  font-size: var(--text-xs);
  font-weight: 700;
  line-height: 1;
  letter-spacing: .12em;
}

.cases-filter-group__list {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: var(--space-2) clamp(14px, 1.8vw, 24px);
}

.cases-filter {
  min-height: 42px;
  border: 0;
  border-bottom: 1px solid var(--color-light-line-soft);
  padding: 0;
  background: transparent;
  color: var(--color-text-medium);
  font-size: var(--text-sm);
  line-height: 1;
  text-align: left;
  transition: color var(--duration-fast) ease, border-color var(--duration-fast) ease,
    background-color var(--duration-fast) ease, padding var(--duration-fast) ease;
}

.cases-filter:hover,
.cases-filter:focus-visible {
  border-color: var(--color-line-strong);
  color: var(--color-text);
}

.cases-filter.is-active {
  border-color: var(--color-text);
  background: var(--color-text);
  color: var(--color-white);
  padding: 0 var(--space-3);
}

/* ---------- 年份筛选（抽屉式 + 横向滚动） ----------
   点击后向右/向下展开，年份选项横向排列、可左右滚动 */

.year-drawer {
  grid-column: 1 / -1;
  display: grid;
  gap: var(--space-2);
  width: 100%;
}

.year-drawer__toggle {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  width: min(100%, 240px);
  min-height: 42px;
  border: 0;
  border-bottom: 1px solid var(--color-light-line-soft);
  padding: 0 var(--space-2) 0 0;
  background: transparent;
  color: var(--color-text-medium);
  font-size: var(--text-sm);
  text-align: left;
  transition: color var(--duration-fast) ease, border-color var(--duration-fast) ease;
}

.year-drawer__toggle:hover,
.year-drawer__toggle:focus-visible,
.year-drawer__toggle[aria-expanded='true'] {
  border-color: var(--color-text);
  color: var(--color-text);
}

.year-drawer__text {
  flex: 1 1 auto;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.year-drawer__chevron {
  display: inline-flex;
  flex: 0 0 auto;
  width: 16px;
  height: 16px;
  align-items: center;
  justify-content: center;
  transition: transform var(--duration-fast) ease;
}

.year-drawer__toggle[aria-expanded='true'] .year-drawer__chevron {
  transform: rotate(180deg);
}

.year-drawer__chevron svg {
  width: 100%;
  height: 100%;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.7;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.year-drawer__panel {
  overflow: hidden;
  transition: height 320ms var(--ease-carousel), opacity 260ms ease,
    transform 320ms var(--ease-carousel);
}

.year-drawer__panel[hidden] { display: none; }
.year-drawer__panel.is-animating { pointer-events: none; }

/* 「全部年份」固定在左，不随具体年份滚动 */
.year-drawer__body {
  display: flex;
  align-items: center;
  gap: clamp(12px, 1.6vw, 20px);
  padding: 2px 0 6px;
}

.year-drawer__pinned {
  flex: 0 0 auto;
}

/* 滚动区：年份轨道 + 右/左悬停箭头 */
.year-drawer__scroller {
  position: relative;
  flex: 1 1 auto;
  min-width: 0;
}

.year-drawer__track {
  display: flex;
  gap: clamp(12px, 1.6vw, 20px);
  overflow-x: auto;
  overscroll-behavior-x: contain;
  padding: 0 8px;
  scrollbar-width: none;
  -ms-overflow-style: none;
  scroll-behavior: smooth;
}

.year-drawer__track::-webkit-scrollbar { display: none; }

.year-drawer__arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 2;
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border: 1px solid var(--color-line-soft);
  border-radius: var(--radius-pill);
  background: var(--color-white);
  color: var(--color-text);
  box-shadow: 0 2px 10px rgba(17, 17, 17, .12);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--duration-fast) ease, background var(--duration-fast) ease,
    color var(--duration-fast) ease;
}

.year-drawer__scroller:hover .year-drawer__arrow:not([hidden]),
.year-drawer__arrow:focus-visible {
  opacity: 1;
  pointer-events: auto;
}

.year-drawer__arrow:hover { background: var(--color-black); color: var(--color-white); }
.year-drawer__arrow[hidden] { display: none; }

.year-drawer__arrow svg {
  width: 16px;
  height: 16px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.7;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.year-drawer__arrow--prev { left: 0; }
.year-drawer__arrow--next { right: 0; }

/* 触摸设备没有悬停：箭头常显 */
@media (hover: none) {
  .year-drawer__arrow:not([hidden]) { opacity: 1; pointer-events: auto; }
}

.year-drawer__body .cases-filter {
  flex: 0 0 auto;
  min-width: 76px;
}

/* ---------- 结果条 ---------- */

.cases-result-bar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3) var(--space-5);
  align-items: center;
  justify-content: space-between;
  min-height: 40px;
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}

.cases-result-bar p {
  margin: 0;
  color: var(--color-text);
  font-weight: 560;
}

.cases-reset {
  min-height: 36px;
  padding: 0 var(--space-3);
}

/* ---------- 项目网格 ---------- */

.case-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(20px, 2vw, 32px);
}

/* 列表视图：任何尺寸下都必须一行一个（覆盖 .case-grid 的响应式列数） */
.case-grid.cases-grid--list { grid-template-columns: 1fr; }

.cases-grid { transition: opacity var(--duration-base) ease; }

.case-card {
  display: block;
  overflow: hidden;
  color: inherit;
  text-decoration: none;
}

.cases-card {
  position: relative;
  background: var(--color-surface-soft);
  border: 1px solid transparent;
  transition: transform var(--duration-base) var(--ease-standard),
    border-color var(--duration-base) ease,
    background-color var(--duration-base) ease;
}

.cases-card:hover,
.cases-card:focus-visible {
  transform: translateY(-4px);
  border-color: var(--color-line-strong);
  background: var(--color-white);
}

.case-card__link { display: block; overflow: hidden; }

/* 卡片右上角：下载离线包（图标按钮） */

.case-dl {
  position: absolute;
  top: 12px;
  right: 12px;
  z-index: 2;
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  color: #fff;
  background: rgba(10, 10, 10, .5);
  border: 0;
  border-radius: var(--radius-pill);
  opacity: 0;
  transform: translateY(-4px);
  transition: opacity var(--duration-base) var(--ease-standard),
    transform var(--duration-base) var(--ease-standard),
    background var(--duration-base) var(--ease-standard);
  backdrop-filter: blur(6px);
}

.case-card:hover .case-dl,
.case-card:focus-within .case-dl,
.case-dl:focus-visible {
  opacity: 1;
  transform: none;
}

.case-dl:hover { background: var(--color-black); }
.case-dl svg { display: block; }
.case-dl.is-busy { opacity: 1; transform: none; }
.case-dl.is-busy svg { animation: dl-pulse 1s var(--ease-standard) infinite; }

@keyframes dl-pulse {
  0%, 100% { opacity: 1; }
  50%      { opacity: .35; }
}

@media (hover: none) {
  .case-dl { opacity: 1; transform: none; }
}

/* 卡片左上角：收藏星标。默认收起，hover/已收藏时常显 */
.case-star {
  position: absolute;
  top: 12px;
  left: 12px;
  z-index: 2;
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  color: #fff;
  background: rgba(10, 10, 10, .5);
  border: 0;
  border-radius: var(--radius-pill);
  opacity: 0;
  transform: translateY(-4px);
  transition: opacity var(--duration-base) var(--ease-standard),
    transform var(--duration-base) var(--ease-standard),
    background var(--duration-base) var(--ease-standard),
    color var(--duration-base) var(--ease-standard);
  backdrop-filter: blur(6px);
}

.case-star svg { display: block; }

.case-star:hover { background: var(--color-black); }

/* 已收藏：常显、金色实心星 */
.case-star.is-on {
  opacity: 1;
  transform: none;
  color: #ffce4d;
}

.case-card:hover .case-star,
.case-card:focus-within .case-star,
.case-star:focus-visible {
  opacity: 1;
  transform: none;
}

@media (hover: none) {
  .case-star { opacity: 1; transform: none; }
}

.case-card img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  background: var(--color-surface-hover-soft);
  transition: transform .7s var(--ease-carousel);
}

.case-card:hover img { transform: scale(1.035); }

.case-content { padding: clamp(22px, 2.4vw, 32px); }

.case-type {
  display: block;
  margin-bottom: var(--space-3);
  color: var(--color-text-muted);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
}

.case-card h2 {
  margin: 0 0 var(--space-4);
  font-size: clamp(22px, 2vw, 30px);
  line-height: var(--leading-title);
  font-weight: 560;
  letter-spacing: -.025em;
}

.case-card .body-copy {
  margin: 0;
  font-size: var(--text-sm);
  line-height: var(--leading-loose);
  color: var(--color-text-muted);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* 尚未上传图片的项目（批量导入的草稿），用占位块兜底 */

.case-thumb--empty {
  display: flex;
  align-items: center;
  justify-content: center;
  aspect-ratio: 4 / 3;
  background: var(--color-surface-soft);
  border: 1px dashed var(--color-line);
  color: var(--color-text-muted);
  font-size: var(--text-xs);
  text-align: center;
  padding: 8px;
  box-sizing: border-box;
}

.case-card__img.case-thumb--empty { width: 100%; }

/* ---------- 列表视图 ---------- */

.cases-grid--list {
  grid-template-columns: 1fr;
  gap: 0;
  border-top: 1px solid var(--color-light-line-soft);
}

.cases-grid--list .case-card {
  display: grid;
  /* 四栏：封面 | 文案（自适应铺满） | 收藏 | 下载按钮（贴右缘） */
  grid-template-columns: minmax(160px, 22%) minmax(0, 1fr) auto auto;
  grid-template-areas:
    "img type  star dl"
    "img title star dl"
    "img body  star dl";
  align-content: center;
  justify-items: start;
  column-gap: clamp(16px, 2.4vw, 32px);
  min-height: 0;
  padding: clamp(22px, 3.2vw, 40px) 0;
  overflow: visible;
  border: 0;
  border-bottom: 1px solid var(--color-light-line-soft);
  background: transparent;
}

.cases-grid--list .case-card:hover,
.cases-grid--list .case-card:focus-visible {
  transform: none;
  border-color: var(--color-light-line-soft);
  background: transparent;
}

/* 让链接内的封面/类别/标题/正文直接参与卡片网格，便于把下载按钮排到标题行 */
.cases-grid--list .case-card__link,
.cases-grid--list .case-content { display: contents; }

.cases-grid--list .case-card__img {
  grid-area: img;
  align-self: center;
  width: 100%;
}

.cases-grid--list .case-type { grid-area: type; align-self: end; }
.cases-grid--list .case-card h2 {
  grid-area: title;
  margin: 0;
  line-height: 1.15;
  align-self: center;
}
.cases-grid--list .body-copy { grid-area: body; }

.cases-grid--list .case-card img {
  height: auto;
  aspect-ratio: 16 / 10;
}

.cases-grid--list .case-card:hover img { transform: none; }

.cases-grid--list .case-card h2 { max-width: 560px; }
.cases-grid--list .case-card .body-copy { max-width: 620px; padding-top: var(--space-2); }

/* 列表视图下的下载按钮：位于文案右侧、与整块文案垂直居中（桌面空间充足） */
.cases-grid--list .case-dl {
  position: static;
  grid-area: dl;
  align-self: center;
  justify-self: end;
  transform: translateX(-4px);
  width: 40px;
  height: 40px;
  color: var(--color-text-muted);
  background: transparent;
  border: 1px solid var(--color-line-soft);
  border-radius: var(--radius-pill);
  backdrop-filter: none;
}

.cases-grid--list .case-dl:hover {
  color: #fff;
  background: var(--color-black);
  border-color: var(--color-black);
}

.cases-grid--list .case-card:hover .case-dl,
.cases-grid--list .case-card:focus-within .case-dl,
.cases-grid--list .case-dl:focus-visible {
  transform: none;
}

/* 列表视图下的收藏星标：与下载按钮同款式、同列居中对齐 */
.cases-grid--list .case-star {
  position: static;
  grid-area: star;
  align-self: center;
  justify-self: end;
  width: 40px;
  height: 40px;
  color: var(--color-text-muted);
  background: transparent;
  border: 1px solid var(--color-line-soft);
  border-radius: var(--radius-pill);
  backdrop-filter: none;
  opacity: 1;
  transform: none;
}

.cases-grid--list .case-star:hover {
  color: #fff;
  background: var(--color-black);
  border-color: var(--color-black);
}

.cases-grid--list .case-star.is-on {
  color: #e0a325;
  background: transparent;
  border-color: var(--color-line-soft);
}

.cases-grid--list .case-star.is-on:hover {
  color: #fff;
  background: var(--color-black);
  border-color: var(--color-black);
}

/* ---------- 空状态 ---------- */

.cases-empty {
  margin: 0;
  padding: clamp(40px, 6vw, 72px);
  background: var(--color-surface-soft);
  color: var(--color-text-muted);
  text-align: center;
}

/* ---------- 加载失败 ---------- */

.cases-error {
  display: grid;
  justify-items: center;
  gap: var(--space-4);
  margin: 0;
  padding: clamp(40px, 6vw, 72px);
  background: var(--color-surface-soft);
  color: var(--color-text-medium);
  text-align: center;
}

.cases-error__text { margin: 0; }

/* ---------- 分页 ---------- */

.cases-pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--space-3);
  padding-top: var(--space-2);
}

.cases-pagination span {
  min-width: 96px;
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  text-align: center;
}

.cases-pagination button {
  min-height: 42px;
  padding: 0 var(--space-4);
}

.cases-pagination button:disabled {
  cursor: default;
  border-color: var(--color-line);
  background: transparent;
  color: var(--color-text-faint);
}

/* ---------- 轻提示 ---------- */

.case-toast {
  position: fixed;
  left: 50%;
  bottom: 32px;
  z-index: var(--z-toast, 900);
  margin: 0;
  padding: 12px 22px;
  max-width: calc(100vw - 48px);
  background: var(--color-black);
  color: #fff;
  font-size: var(--text-sm);
  border-radius: 0;
  box-shadow: 0 8px 30px rgba(0, 0, 0, .18);
  opacity: 0;
  transform: translate(-50%, 12px);
  pointer-events: none;
  transition: opacity var(--duration-base) var(--ease-standard),
    transform var(--duration-base) var(--ease-standard);
}

.case-toast.is-on { opacity: 1; transform: translate(-50%, 0); }
.case-toast.is-error { background: #7a1f1f; }

/* ---------- 响应式 ---------- */

@media (max-width: 980px) {
  .case-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }

  .cases-toolbar {
    grid-template-columns: 1fr;
    align-items: stretch;
  }

  .cases-toolbar__actions { justify-content: space-between; }

  .cases-filter-group {
    grid-template-columns: 1fr;
    gap: var(--space-3);
  }

  .cases-filter-group__list { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .cases-filter-group__title { padding-top: 0; }
}

@media (max-width: 720px) {
  .cases-hero { padding-top: clamp(44px, 14vw, 68px); }

  .cases-toolbar__actions { align-items: stretch; }

  .cases-filter-panel,
  .cases-filter-toggle { flex: 1 1 auto; }

  .cases-filter-toggle { justify-content: flex-start; }

  .cases-filter-group__list { grid-template-columns: 1fr; }

  .cases-view { width: 46px; }

  /* 窄屏横排空间不足：仍是「左图右文」，仅把封面缩窄，收藏/下载按钮移到标题同一行右端 */
  .cases-grid--list .case-card {
    grid-template-columns: clamp(96px, 26%, 160px) minmax(0, 1fr) auto auto;
    grid-template-areas:
      "img type  star dl"
      "img title star dl"
      "img body  star dl";
    column-gap: var(--space-4);
  }

  .cases-grid--list .case-card h2 { padding-right: 0; }

  .cases-grid--list .case-star,
  .cases-grid--list .case-dl { width: 36px; height: 36px; }

  .cases-grid--list .case-card img { aspect-ratio: 4 / 3; }
}

@media (max-width: 640px) {
  .case-grid { grid-template-columns: 1fr; }
  .year-drawer__toggle { width: 100%; }
}