/* ==========================================================================
   黄海东 · 作品集 — 项目详情页（6 个详情页共用）
   依赖 base.css（设计令牌 / 通用组件）
   ========================================================================== */

/* ── 顶栏 ─────────────────────────────────────────────────────────────── */
.detail-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  gap: 0.75rem 1rem;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--line);
  background: rgba(245, 245, 243, 0.82);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

/* 图纸编号：SHEET 01 / 06，与首页工程标注语汇一致 */
.detail-nav-index {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  font-variant-numeric: tabular-nums;
  color: var(--ink);
}

/* 阅读进度：贴在顶栏下沿，随滚动推进 */
.detail-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  pointer-events: none;
}

.detail-progress span {
  display: block;
  height: 100%;
  width: var(--p, 0%);
  background: var(--ink);
}

.back-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1.25rem;
  border: 1px solid var(--line-mid);
  border-radius: 9999px;
  background: var(--surface);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  color: var(--ink);
  transition: background-color 0.3s var(--ease), color 0.3s var(--ease), border-color 0.3s var(--ease);
}

.back-btn::before { content: '←'; font-size: 0.95rem; line-height: 1; }

.back-btn:hover {
  background: var(--ink);
  border-color: var(--ink);
  color: #FFFFFF;
}

.nav-title {
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--muted);
}

@media (min-width: 768px) {
  .detail-nav { padding: 1.25rem 2.5rem; }
}

/* 窄屏优先保住「返回」与编号，标题文字让位 */
@media (max-width: 560px) {
  .nav-title { display: none; }
  .back-btn { padding: 0.5rem 1rem; letter-spacing: 0.08em; }
}

/* ── 版面 ─────────────────────────────────────────────────────────────── */
.container {
  max-width: 62rem;
  margin: 0 auto;
  padding: 0 1.25rem;
}

@media (min-width: 640px) {
  .container { padding: 0 2rem; }
}

.project-detail { padding: 3rem 0 4rem; }

@media (min-width: 768px) {
  .project-detail { padding: 4.5rem 0 6rem; }
}

/* ── 标题区 ───────────────────────────────────────────────────────────── */
.project-detail-header { margin-bottom: 3rem; }

.project-detail-title {
  font-size: clamp(1.9rem, 6vw, 4.2rem);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.02em;
  background-image: var(--grad-on-light);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

.project-detail-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 1.25rem;
  margin-top: 1.25rem;
}

.project-detail-role {
  font-size: 0.85rem;
  color: var(--muted);
}

.project-detail-role strong { color: var(--ink); font-weight: 500; }

.project-detail-year {
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

/* ── 规格表：沿用首页 MCU / SYS / AWARD 的工程标注语汇 ───────────────── */
.project-spec {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0 2.5rem;
  margin-bottom: 3rem;
  border-top: 1px solid var(--line-mid);
}

.project-spec-item {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  padding: 0.65rem 0;
  border-bottom: 1px solid var(--line-soft);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
}

.project-spec-item dt {
  flex: none;
  min-width: 5.5rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

.project-spec-item dd { color: var(--ink); letter-spacing: 0.02em; }

/* 最后一条（成果）横跨整行，形成图纸标题栏的收口感 */
.project-spec-item:last-child { grid-column: 1 / -1; }

@media (min-width: 640px) {
  .project-spec { grid-template-columns: 1fr 1fr; }
  .project-spec-item { font-size: 0.74rem; padding: 0.75rem 0; }
}

/* ── 小节 ─────────────────────────────────────────────────────────────── */
.project-detail { counter-reset: detail-sec; }

.project-detail-section { margin-bottom: 3rem; }

.project-detail-section-title {
  display: flex;
  align-items: center;
  gap: 0.875rem;
  margin-bottom: 1.25rem;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--muted);
}

/* 自动编号 01 / 02 / 03 …：无需在 HTML 里手写 */
.project-detail-section-title::before {
  counter-increment: detail-sec;
  content: counter(detail-sec, decimal-leading-zero);
  font-family: var(--font-mono);
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--soft);
  font-variant-numeric: tabular-nums;
}

.project-detail-section-title::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--line);
}

.project-detail-section p {
  font-size: 0.95rem;
  font-weight: 300;
  line-height: 1.85;
  color: var(--fg);
}

.project-detail-section ul { display: grid; }

.project-detail-section li {
  position: relative;
  padding: 0.65rem 0 0.65rem 1.5rem;
  border-bottom: 1px solid var(--line-soft);
  font-size: 0.9rem;
  font-weight: 300;
  line-height: 1.75;
  color: var(--fg);
}

.project-detail-section li:last-child { border-bottom: none; }

.project-detail-section li::before {
  content: '';
  position: absolute;
  left: 0.2rem;
  top: 1.35rem;
  width: 0.35rem;
  height: 0.35rem;
  border-radius: 50%;
  background: var(--soft);
}

/* ── 图片画廊 ─────────────────────────────────────────────────────────── */
.project-gallery {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: start;
  gap: 0.75rem;
}

.project-gallery img {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  object-fit: cover;
  background: var(--surface);
  cursor: zoom-in;
  transition: transform 0.5s var(--ease), border-color 0.4s var(--ease), box-shadow 0.4s var(--ease);
}

.project-gallery img:hover {
  transform: scale(1.015);
  border-color: var(--line-mid);
  box-shadow: 0 22px 50px -30px rgba(12, 12, 12, 0.55);
}

.project-gallery img.full-width { grid-column: 1 / -1; }

/* 标识 / Logo 类素材：独占一行并居中收窄，避免半宽格子空出右半边 */
.project-gallery img.is-mark {
  grid-column: 1 / -1;
  width: min(100%, 20rem);
  margin: 0 auto;
}

/* ── 视频 ─────────────────────────────────────────────────────────────── */
/* --media-ratio 由脚本在 loadedmetadata 后写入真实宽高比，
   加载前用 16 / 9 占位，彻底消除布局抖动。
   width 必须写死：否则 max-height 生效时浏览器会按比例反推宽度，
   视频卡片会比同栏其它内容窄一截 */
.detail-media {
  width: 100%;
  aspect-ratio: var(--media-ratio, 16 / 9);
  max-height: 78vh;
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  overflow: hidden;
  background: #0C0C0C;
}

.detail-media video {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: #0C0C0C;
}

.detail-media-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

/* 多段视频：宽屏两列，避免竖屏素材把页面拉得过长 */
@media (min-width: 768px) {
  .detail-media-list { grid-template-columns: 1fr 1fr; align-items: start; }
}

/* ── 结论强调块 ───────────────────────────────────────────────────────── */
.project-detail-highlight {
  padding: 1.5rem 1.75rem;
  border: 1px solid var(--line);
  border-left: 3px solid var(--ink);
  border-radius: 0.9rem;
  background: var(--surface);
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--ink);
}

.project-detail-highlight strong { font-weight: 600; }

/* ── 技术标签 ─────────────────────────────────────────────────────────── */
.project-detail-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.project-detail-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.45rem 1rem;
  border: 1px solid var(--line-mid);
  border-radius: 9999px;
  background: var(--surface);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  color: var(--fg);
}

.project-detail-tag svg { width: 0.85rem; height: 0.85rem; flex: none; }

.project-detail-tag.highlight {
  background: var(--ink);
  border-color: var(--ink);
  color: #FFFFFF;
}

/* ── 代码块 ───────────────────────────────────────────────────────────── */
.code-block {
  margin-top: 0.5rem;
  border-radius: 1rem;
  overflow: hidden;
  background: #1E1E2E;
}

.code-header {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 0.875rem;
  padding: 0.7rem 1rem;
  border-bottom: 1px solid #313244;
  background: #181825;
}

.code-dots { display: flex; gap: 0.375rem; }

.code-dot { width: 0.625rem; height: 0.625rem; border-radius: 50%; }

.code-dot.red { background: #F38BA8; }
.code-dot.yellow { background: #F9E2AF; }
.code-dot.green { background: #A6E3A1; }

.code-filename {
  font-family: 'SF Mono', 'Fira Code', 'Courier New', monospace;
  font-size: 0.72rem;
  color: #A6ADC8;
}

/* 复制按钮：由脚本注入，无脚本时不出现 */
.code-copy {
  margin-left: auto;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.3rem 0.7rem;
  border: 1px solid #313244;
  border-radius: 9999px;
  font-family: 'SF Mono', 'Fira Code', 'Courier New', monospace;
  font-size: 0.64rem;
  letter-spacing: 0.1em;
  color: #A6ADC8;
  background: transparent;
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease), background-color 0.25s var(--ease);
}

.code-copy:hover { color: #CDD6F4; border-color: #585B70; background: rgba(205, 214, 244, 0.07); }
.code-copy.is-done { color: #A6E3A1; border-color: rgba(166, 227, 161, 0.5); }

.code-body {
  padding: 1rem;
  overflow-x: auto;
}

.code-body pre {
  font-family: 'SF Mono', 'Fira Code', 'Courier New', monospace;
  font-size: 0.76rem;
  line-height: 1.7;
  color: #CDD6F4;
  white-space: pre;
}

.code-body .keyword { color: #CBA6F7; }
.code-body .type    { color: #89B4FA; }
.code-body .func    { color: #89DCEB; }
.code-body .comment { color: #6C7086; font-style: italic; }
.code-body .string  { color: #A6E3A1; }
.code-body .number  { color: #FAB387; }

/* ── 项目翻页：上一件 / 下一件 ────────────────────────────────────────── */
.project-pager {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.project-pager-link {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  padding: 1.25rem 1.5rem;
  border: 1px solid var(--line);
  border-radius: 1.25rem;
  background: var(--surface);
  transition: transform 0.3s var(--ease), border-color 0.3s var(--ease), background-color 0.3s var(--ease);
}

.project-pager-link:hover {
  transform: translateY(-2px);
  border-color: var(--line-mid);
  background: #FBFBFA;
}

.project-pager-label {
  font-family: var(--font-mono);
  font-size: 0.64rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
}

.project-pager-name {
  font-size: clamp(0.95rem, 1.7vw, 1.15rem);
  font-weight: 600;
  line-height: 1.35;
  color: var(--ink);
}

.project-pager-link.is-next { align-items: flex-end; text-align: right; }

@media (min-width: 640px) {
  .project-pager { grid-template-columns: 1fr 1fr; gap: 1rem; }
}

/* ── 页脚返回 ─────────────────────────────────────────────────────────── */
.detail-footer {
  display: flex;
  justify-content: center;
  padding: 2.5rem 1.25rem 5rem;
}

/* ── 图片灯箱：点击画廊大图全屏查看 ──────────────────────────────────── */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 300;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: clamp(1rem, 5vw, 3rem);
  background: rgba(12, 12, 12, 0.92);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s var(--ease), visibility 0.3s var(--ease);
}

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

.lightbox img {
  width: auto;
  height: auto;
  max-width: 100%;
  max-height: 100%;
  border-radius: 0.75rem;
  box-shadow: 0 40px 90px -40px rgba(0, 0, 0, 0.9);
  transform: scale(0.98);
  transition: transform 0.3s var(--ease);
}

.lightbox.is-open img { transform: scale(1); }

.lightbox-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.75rem;
  height: 2.75rem;
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 50%;
  color: #FFFFFF;
  background: rgba(255, 255, 255, 0.06);
  transition: background-color 0.25s var(--ease), border-color 0.25s var(--ease);
}

.lightbox-close:hover { background: rgba(255, 255, 255, 0.16); border-color: rgba(255, 255, 255, 0.55); }
.lightbox-close svg { width: 1.05rem; height: 1.05rem; }

/* 灯箱打开时锁住底层滚动 */
body.is-locked { overflow: hidden; }

@media (max-width: 640px) {
  .project-gallery { grid-template-columns: 1fr; }
  .code-body { padding: 0.75rem; }
  .code-body pre { font-size: 0.7rem; }
  .project-spec-item dt { min-width: 4.5rem; }
  .project-pager-link { padding: 1.1rem 1.25rem; }
}

/* ── 移动端降载：吸顶导航的实时模糊会在滚动时逐帧重算，代价很高 ────── */
@media (max-width: 720px) {
  .detail-nav {
    background: rgba(245, 245, 243, 0.96);
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
  }
  .lightbox {
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
  }
}