/* ============================================================
   MBX · 作品集详情页（portfolio.html）
   左侧两级导航（三个顶级分类 → 各自的小分类）+ 右侧作品展示
   依赖 styles.css 里的颜色变量与通用样式
   ============================================================ */

[hidden] {
  display: none !important;
}

/* ---------------- 顶部栏 ---------------- */

.pf-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(255, 255, 255, 0.6);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid rgba(255, 255, 255, 0.55);
  transition: box-shadow 0.5s var(--ease), background-color 0.5s var(--ease);
}

.pf-header.is-scrolled {
  background: rgba(255, 255, 255, 0.78);
  box-shadow: 0 18px 44px -34px rgba(74, 92, 160, 0.7), inset 0 -1px 0 rgba(74, 92, 160, 0.06);
}

@supports not ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
  .pf-header {
    background: rgba(243, 246, 253, 0.96);
  }
}

.pf-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  height: 100%;
  width: 100%;
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 clamp(20px, 4.5vw, 60px);
}

.pf-header-side {
  display: flex;
  align-items: center;
  gap: clamp(12px, 2vw, 26px);
}

.pf-header-crumb {
  font-family: var(--font-en);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--muted);
}

.pf-back {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 18px;
  border-radius: 999px;
  border: 1px solid rgba(126, 169, 240, 0.35);
  background: rgba(255, 255, 255, 0.66);
  font-size: 0.84rem;
  letter-spacing: 0.04em;
  color: var(--ink);
  transition: transform 0.35s var(--ease), border-color 0.35s var(--ease),
    background-color 0.35s var(--ease), color 0.35s var(--ease);
}

.pf-back:hover {
  transform: translateY(-2px);
  border-color: var(--accent-violet);
  background: rgba(255, 255, 255, 0.94);
  color: var(--ink-strong);
}

/* ---------------- 页面骨架 ---------------- */

.pf-main {
  position: relative;
  z-index: 1;
  padding-top: var(--header-h);
}

.pf-layout {
  /* 左栏和视口上下留白用同一个值：进页面时目录面板上下间距一致 */
  --pf-gutter: clamp(28px, 3.6vw, 56px);

  display: grid;
  grid-template-columns: 274px minmax(0, 1fr);
  gap: clamp(26px, 3.4vw, 64px);
  align-items: start;
  width: 100%;
  max-width: 1440px;
  margin: 0 auto;
  padding: var(--pf-gutter) clamp(20px, 4.5vw, 60px) clamp(64px, 9vw, 140px);
}

/* ---------------- 左侧导航 ---------------- */

.pf-sidebar {
  position: sticky;
  top: calc(var(--header-h) + var(--pf-gutter));
  /* 面板高度自适应可视区域：内容不满就留白，内容多了在面板内部滚动 */
  display: flex;
  flex-direction: column;
  height: calc(100vh - var(--header-h) - var(--pf-gutter) * 2);
  min-height: 280px;
  overflow: hidden;
  padding: 16px;
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid rgba(255, 255, 255, 0.9);
  box-shadow: var(--shadow-card);
  -webkit-backdrop-filter: blur(16px) saturate(170%);
  backdrop-filter: blur(16px) saturate(170%);
}

/* 手机端才出现的目录按钮 */
.pf-nav-toggle {
  display: none;
  align-items: center;
  gap: 12px;
  width: 100%;
  padding: 12px 14px;
  border: 0;
  border-radius: var(--radius-md);
  background: transparent;
  font-family: inherit;
  color: var(--ink);
  text-align: left;
  cursor: pointer;
}

.pf-nav-toggle-bars {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 22px;
  flex: none;
}

.pf-nav-toggle-bars span {
  display: block;
  height: 1.5px;
  border-radius: 2px;
  background: currentColor;
  transition: transform 0.4s var(--ease), opacity 0.4s var(--ease);
}

.pf-sidebar.is-open .pf-nav-toggle-bars span:first-child {
  transform: translateY(3.25px) rotate(45deg);
}

.pf-sidebar.is-open .pf-nav-toggle-bars span:last-child {
  transform: translateY(-3.25px) rotate(-45deg);
}

.pf-nav-toggle-text {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

.pf-nav-toggle-kicker {
  font-family: var(--font-en);
  font-size: 9.5px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--muted);
}

.pf-nav-toggle-label {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--ink-strong);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.pf-nav-toggle-arrow {
  margin-left: auto;
  font-size: 0.75rem;
  color: var(--muted);
  transition: transform 0.4s var(--ease);
}

.pf-sidebar.is-open .pf-nav-toggle-arrow {
  transform: rotate(180deg);
}

/* 目录面板：顶部切换按钮固定，中间的目录可滚动，联系信息贴底 */
.pf-nav-panel {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-height: 0;
}

/* 年份作品集切换 */
.pf-switch {
  flex: none;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
  padding: 5px;
  border-radius: 999px;
  background: rgba(242, 245, 253, 0.9);
  border: 1px solid var(--line);
}

.pf-switch-btn {
  padding: 10px 6px;
  border: 0;
  border-radius: 999px;
  background: transparent;
  font-family: inherit;
  font-size: 0.82rem;
  letter-spacing: 0.02em;
  color: var(--ink-soft);
  cursor: pointer;
  transition: background 0.4s var(--ease), color 0.4s var(--ease), box-shadow 0.4s var(--ease);
}

.pf-switch-btn:hover {
  color: var(--ink-strong);
}

.pf-switch-btn.is-active {
  background: var(--grad-accent);
  color: #fff;
  box-shadow: 0 16px 30px -20px rgba(110, 130, 210, 0.95);
}

.pf-nav {
  margin-top: 14px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  /* 目录区占满剩余高度：小分类多了这里滚动，联系信息始终贴在面板最下方 */
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  overscroll-behavior: contain;
  padding-right: 2px;
}

.pf-nav::-webkit-scrollbar {
  width: 6px;
}

.pf-nav::-webkit-scrollbar-thumb {
  border-radius: 999px;
  background: rgba(148, 149, 154, 0.35);
}

.pf-nav-group {
  padding-bottom: 6px;
  border-bottom: 1px solid var(--line);
}

.pf-nav-group:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.pf-group-btn {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 12px 10px 8px;
  border: 0;
  background: transparent;
  font-family: inherit;
  text-align: left;
  cursor: pointer;
  color: var(--ink-soft);
  transition: color 0.35s var(--ease);
}

.pf-group-btn:hover {
  color: var(--ink-strong);
}

.pf-group-index {
  font-family: var(--font-en);
  font-size: 10px;
  letter-spacing: 0.16em;
  color: var(--muted);
}

.pf-group-name {
  font-size: 0.86rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.pf-group-count {
  margin-left: auto;
  font-family: var(--font-en);
  font-size: 10px;
  letter-spacing: 0.16em;
  color: var(--muted);
}

.pf-nav-group.is-active .pf-group-btn {
  color: var(--ink-strong);
}

.pf-nav-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.pf-nav-link {
  position: relative;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 12px 9px 26px;
  border-radius: 12px;
  font-size: 0.9rem;
  color: var(--ink-soft);
  transition: background-color 0.35s var(--ease), color 0.35s var(--ease), opacity 0.35s var(--ease);
}

.pf-nav-link::before {
  content: "";
  position: absolute;
  left: 12px;
  top: 50%;
  width: 6px;
  height: 6px;
  margin-top: -3px;
  border-radius: 50%;
  background: rgba(148, 149, 154, 0.5);
  transition: background-color 0.35s var(--ease), box-shadow 0.35s var(--ease);
}

.pf-nav-index {
  font-family: var(--font-en);
  font-size: 10px;
  letter-spacing: 0.14em;
  color: var(--muted);
}

.pf-nav-link:hover {
  background: rgba(255, 255, 255, 0.86);
  color: var(--ink-strong);
  opacity: 1;
}

.pf-nav-link.is-active {
  background: rgba(171, 147, 239, 0.16);
  color: var(--ink-strong);
  opacity: 1;
}

.pf-nav-link.is-active::before {
  background: var(--accent-violet);
  box-shadow: 0 0 0 4px rgba(171, 147, 239, 0.2);
}

/* 非当前作品集的小分类稍微退到后面，当前作品集的目录最清楚 */
.pf-nav-group:not(.is-active) .pf-nav-link {
  opacity: 0.66;
}

.pf-nav-group:not(.is-active) .pf-nav-link.is-active {
  opacity: 1;
}

.pf-sidebar-foot {
  flex: none;
  margin-top: 16px;
  padding: 14px 10px 4px;
  border-top: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 0.78rem;
  color: var(--muted);
}

.pf-sidebar-foot a {
  font-family: var(--font-en);
  letter-spacing: 0.04em;
  color: var(--ink-soft);
  transition: color 0.3s var(--ease);
}

.pf-sidebar-foot a:hover {
  color: var(--accent-violet);
}

/* 手机端抽屉遮罩（放在 .pf-main 里，保证它在内容之上、目录之下） */
.pf-scrim {
  position: fixed;
  inset: var(--header-h) 0 0;
  z-index: 89;
  background: rgba(43, 50, 82, 0.26);
  -webkit-backdrop-filter: blur(2px);
  backdrop-filter: blur(2px);
}

/* ---------------- 右侧内容 ---------------- */

.pf-content {
  min-width: 0;
}

.pf-intro {
  padding-bottom: clamp(26px, 3.4vw, 42px);
  margin-bottom: clamp(30px, 4vw, 52px);
  border-bottom: 1px solid var(--line-strong);
}

.pf-intro-title {
  margin: 16px 0 0;
  font-size: clamp(1.85rem, 3.6vw, 3rem);
  font-weight: 600;
  line-height: 1.24;
  letter-spacing: -0.01em;
  color: var(--ink-strong);
}

.pf-intro-en {
  margin: 6px 0 0;
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1rem;
  color: var(--muted);
}

.pf-intro-desc {
  max-width: 52ch;
  margin: 16px 0 0;
  font-size: 0.96rem;
  color: var(--ink-soft);
}

.pf-intro-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 20px;
}

.pf-intro-tags li {
  padding: 6px 14px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid rgba(126, 169, 240, 0.28);
  font-size: 0.76rem;
  letter-spacing: 0.04em;
  color: var(--ink-soft);
}

/* 小分类 */
.pf-category {
  padding: 0 0 clamp(38px, 5vw, 68px);
  margin-bottom: clamp(38px, 5vw, 68px);
  border-bottom: 1px dashed var(--line-strong);
  border-radius: 20px;
  scroll-margin-top: calc(var(--header-h) + 28px);
}

.pf-category:last-child {
  border-bottom: 0;
  margin-bottom: 0;
  padding-bottom: 0;
}

.pf-category-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-family: var(--font-en);
  font-size: 10.5px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
}

.pf-category-index {
  padding-bottom: 2px;
  border-bottom: 1px solid var(--line-strong);
  color: var(--ink-strong);
}

.pf-category-name {
  margin: 12px 0 0;
  font-size: clamp(1.25rem, 2.2vw, 1.75rem);
  font-weight: 600;
  line-height: 1.4;
  color: var(--ink-strong);
}

.pf-category-en {
  margin: 4px 0 0;
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 0.92rem;
  color: var(--muted);
}

.pf-category-desc {
  max-width: 62ch;
  margin: 12px 0 0;
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--ink-soft);
}

.pf-category .tags {
  margin-top: 16px;
}

/* 作品图：先放占位图，后续替换 src 即可 */
.pf-gallery {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(14px, 1.6vw, 22px);
  margin-top: clamp(20px, 2.6vw, 32px);
}

.pf-shot {
  position: relative;
  margin: 0;
  overflow: hidden;
  border-radius: var(--radius-md);
  background: var(--surface-soft);
  border: 1px solid rgba(255, 255, 255, 0.9);
  box-shadow: var(--shadow-card);
}

.pf-shot--wide {
  grid-column: 1 / -1;
}

.pf-shot img {
  display: block;
  width: 100%;
  height: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.pf-shot--wide img {
  aspect-ratio: 16 / 9;
}

/* 整页设计稿：单列竖排，按原比例整张展示，不裁切 */
.pf-gallery--flow {
  grid-template-columns: minmax(0, 1fr);
}

/* 海报组：三张并排一组，重点海报单独占满一行 */
.pf-gallery--posters {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  align-items: start;
}

.pf-gallery--posters .pf-shot--span-full {
  grid-column: 1 / -1;
}

.pf-poster-duo {
  display: grid;
  grid-template-columns: minmax(0, 0.565fr) minmax(0, 1fr);
  align-items: stretch;
  gap: clamp(14px, 1.6vw, 22px);
}

.pf-poster-duo .pf-shot {
  min-width: 0;
}

.pf-poster-pair {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  align-items: stretch;
  gap: clamp(14px, 1.6vw, 22px);
}

.pf-poster-pair .pf-shot {
  min-width: 0;
}

/* 作品集开头的目录总览图 */
.pf-overview {
  margin-bottom: clamp(30px, 4vw, 56px);
}

.pf-shot--page img {
  aspect-ratio: auto;
  height: auto;
  object-fit: contain;
}

/* ---------------- 作品大图预览 ---------------- */

/* 双击选不中文字，也不会把图片拖出来 */
.pf-gallery img {
  -webkit-user-drag: none;
  user-select: none;
}

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 14px;
  padding: clamp(18px, 4vw, 48px);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.32s var(--ease), visibility 0.32s;
}

.lightbox.is-open {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.lightbox__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(20, 23, 38, 0.88);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}

.lightbox__stage {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  width: 100%;
  flex: 1;
  min-height: 0;
  margin: 0;
  padding: 4px 0;
  overflow-x: hidden;
  overflow-y: auto;
  overscroll-behavior: contain;
  touch-action: pan-y;
  scrollbar-width: thin;
}

.lightbox__stage::-webkit-scrollbar {
  width: 8px;
}

.lightbox__stage::-webkit-scrollbar-thumb {
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.28);
}

.lightbox__image {
  display: block;
  width: auto;
  height: auto;
  /* 按宽度放大；长图超出屏幕时在舞台里滚动查看 */
  max-width: min(92vw, 1680px);
  max-height: none;
  margin: auto 0;
  object-fit: contain;
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 40px 90px -30px rgba(0, 0, 0, 0.75);
  transform: scale(0.97);
  transition: transform 0.35s var(--ease);
}

.lightbox.is-open .lightbox__image {
  transform: none;
}

.lightbox__caption {
  position: relative;
  z-index: 1;
  flex: none;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  max-width: min(90vw, 1200px);
  font-size: 0.82rem;
  color: rgba(255, 255, 255, 0.72);
  text-align: center;
}

.lightbox__text {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.lightbox__count {
  flex: none;
  font-family: var(--font-en);
  letter-spacing: 0.14em;
  color: rgba(255, 255, 255, 0.9);
}

.lightbox__btn {
  position: absolute;
  z-index: 2;
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  padding: 0;
  border: 1px solid rgba(255, 255, 255, 0.24);
  border-radius: 50%;
  background: rgba(20, 23, 38, 0.55);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  color: #fff;
  font-family: var(--font-en);
  font-size: 1.05rem;
  line-height: 1;
  cursor: pointer;
  box-shadow: 0 12px 30px -14px rgba(0, 0, 0, 0.7);
  transition: background 0.3s var(--ease), border-color 0.3s var(--ease), opacity 0.3s var(--ease);
}

.lightbox__btn:hover {
  background: rgba(20, 23, 38, 0.78);
  border-color: rgba(255, 255, 255, 0.45);
}

.lightbox__btn:focus-visible {
  outline: 2px solid #fff;
  outline-offset: 3px;
}

.lightbox__btn:disabled {
  opacity: 0.25;
  cursor: default;
}

.lightbox__close {
  top: clamp(14px, 2.2vw, 28px);
  right: clamp(14px, 2.2vw, 28px);
  font-size: 1.4rem;
}

.lightbox__prev {
  left: clamp(10px, 1.6vw, 28px);
  top: 50%;
  margin-top: -24px;
}

.lightbox__next {
  right: clamp(10px, 1.6vw, 28px);
  top: 50%;
  margin-top: -24px;
}

/* 从首页跳进来时，给落点一个短暂的提示 */
.pf-category.is-flash {
  animation: pf-flash 1.9s var(--ease) 1;
}

@keyframes pf-flash {
  0% {
    background: rgba(171, 147, 239, 0.14);
    box-shadow: 0 0 0 14px rgba(171, 147, 239, 0.14);
  }
  100% {
    background: transparent;
    box-shadow: 0 0 0 14px rgba(171, 147, 239, 0);
  }
}

/* ---------------- 进场动画 ---------------- */

.pf-reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.85s var(--ease), transform 0.85s var(--ease);
}

.pf-reveal.is-in {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  .pf-reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .pf-category.is-flash {
    animation: none;
  }
}

/* ---------------- 响应式 ---------------- */

@media (max-width: 1200px) {
  .pf-layout {
    grid-template-columns: 244px minmax(0, 1fr);
  }
}

/* 平板 / 手机：左侧导航变成顶部目录抽屉 */
@media (max-width: 1024px) {
  .pf-layout {
    grid-template-columns: minmax(0, 1fr);
    gap: 0;
    padding-top: 0;
  }

  .pf-sidebar {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    z-index: 90;
    /* 手机端只是顶部那条目录栏，不再拉伸到整屏 */
    display: block;
    height: auto;
    min-height: 0;
    overflow: visible;
    padding: 6px clamp(12px, 3vw, 24px);
    border-radius: 0 0 22px 22px;
    border-top: 0;
  }

  .pf-nav-toggle {
    display: flex;
  }

  .pf-nav-panel {
    position: absolute;
    top: 100%;
    left: clamp(8px, 2vw, 18px);
    right: clamp(8px, 2vw, 18px);
    max-height: min(68vh, 560px);
    overflow-y: auto;
    overscroll-behavior: contain;
    padding: 14px;
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
    background: rgba(255, 255, 255, 0.9);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid rgba(255, 255, 255, 0.9);
    border-top: 0;
    box-shadow: 0 30px 60px -40px rgba(28, 28, 29, 0.9);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: opacity 0.35s var(--ease), transform 0.35s var(--ease), visibility 0.35s;
  }

  .pf-sidebar.is-open .pf-nav-panel {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  .pf-nav {
    margin-top: 12px;
  }

  .pf-content {
    padding-top: 76px;
  }
}

@media (max-width: 860px) {
  .pf-header-crumb {
    display: none;
  }

  .pf-back {
    padding: 8px 14px;
    font-size: 0.8rem;
  }

  .pf-gallery--posters {
    grid-template-columns: minmax(0, 1fr);
  }

  .pf-gallery--posters .pf-shot--span-full {
    grid-column: auto;
  }

  .pf-poster-duo {
    grid-template-columns: minmax(0, 1fr);
  }

  .pf-poster-pair {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 560px) {
  .pf-header-inner {
    gap: 12px;
  }

  .pf-gallery {
    grid-template-columns: minmax(0, 1fr);
    gap: 12px;
  }

  /* 占位小图在手机上统一成 4:3；整页作品稿保持原始比例，不能套 4:3 */
  .pf-shot:not(.pf-shot--page) img {
    aspect-ratio: 4 / 3;
  }

  .pf-intro-tags li {
    padding: 5px 11px;
    font-size: 0.72rem;
  }

  .lightbox {
    padding: 16px 12px 22px;
  }

  .lightbox__btn {
    width: 40px;
    height: 40px;
    font-size: 0.95rem;
  }

  .lightbox__prev {
    left: 6px;
    margin-top: -20px;
  }

  .lightbox__next {
    right: 6px;
    margin-top: -20px;
  }

  .lightbox__caption {
    gap: 10px;
    font-size: 0.75rem;
  }
}