/* ============ 本草图志 · 纸墨设计令牌 ============ */
:root {
  --paper:      #f6f1e4;   /* 宣纸底 */
  --paper-deep: #efe7d3;   /* 纸色深一档 */
  --ink:        #221a10;   /* 墨色正文 */
  --ink-soft:   #5c4f3a;   /* 次级墨 */
  --ink-mute:   #94866d;   /* 辅助 */
  --cinnabar:   #a63a24;   /* 朱砂强调 */
  --line:       #ddd2b8;   /* 细线 */
  --f-serif: "Source Han Serif SC", "Noto Serif SC", "Songti SC", "STSong", "SimSun", serif;
  --f-sans: -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  --ease: cubic-bezier(.22,.61,.36,1);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--f-serif);
  font-size: 16px;
  line-height: 1.9;
  -webkit-font-smoothing: antialiased;
}
body.modal-open { overflow: hidden; }
a { color: inherit; text-decoration: none; }
img { display: block; }

/* ============ 头尾 ============ */
.site-head {
  display: flex; align-items: baseline; justify-content: space-between;
  padding: 26px clamp(20px, 6vw, 72px) 18px;
  border-bottom: 1px solid var(--line);
}
.brand {
  font-size: 22px; letter-spacing: 6px; font-weight: 600;
}
.brand::first-letter { color: var(--cinnabar); }
.site-nav { display: flex; gap: clamp(16px, 3vw, 36px); font-size: 15px; color: var(--ink-soft); }
.site-nav a { padding-bottom: 2px; border-bottom: 1px solid transparent; transition: color .3s var(--ease), border-color .3s var(--ease); }
.site-nav a:hover { color: var(--cinnabar); }
.site-nav a.on { color: var(--cinnabar); border-bottom-color: var(--cinnabar); }

.site-foot {
  margin-top: 80px;
  padding: 28px clamp(20px, 6vw, 72px) 40px;
  border-top: 1px solid var(--line);
  color: var(--ink-mute);
  font-size: 13px;
  font-family: var(--f-sans);
  line-height: 1.8;
}
.site-foot p { margin: 2px 0; }
.site-foot a {
  color: inherit;
  border-bottom: 1px solid rgba(148, 134, 109, .45);
  transition: color .25s var(--ease), border-color .25s var(--ease);
}
.site-foot a:hover {
  color: var(--cinnabar);
  border-bottom-color: var(--cinnabar);
}
.site-beian {
  margin-top: 8px;
}

.ai-badge {
  display: inline-block;
  padding: 0 6px;
  border: 1px solid var(--cinnabar);
  border-radius: 3px;
  color: var(--cinnabar);
  font-size: 11px;
  letter-spacing: 1px;
  vertical-align: 1px;
}

main { min-height: 62vh; }

/* ============ 入场动效：淡入上移 + 错峰 ============ */
.rise { opacity: 0; transform: translateY(14px); animation: rise .6s var(--ease) forwards; }
@keyframes rise { to { opacity: 1; transform: none; } }

/* ============ 书架（首页） ============ */
.hero {
  display: grid;
  grid-template-columns: minmax(260px, 420px) 1fr;
  gap: clamp(28px, 6vw, 80px);
  align-items: center;
  padding: clamp(36px, 7vh, 80px) clamp(20px, 6vw, 72px);
  max-width: 1180px; margin: 0 auto;
}
.hero-cover { position: relative; }
.hero-cover img {
  width: 100%;
  border: 1px solid var(--line);
  box-shadow: 14px 18px 0 var(--paper-deep);
}
.hero-kicker {
  font-family: var(--f-sans);
  font-size: 12px; letter-spacing: 4px; color: var(--cinnabar);
  margin-bottom: 14px;
}
.hero h1 {
  margin: 0 0 6px;
  font-size: clamp(30px, 4.4vw, 46px);
  font-weight: 600;
  letter-spacing: 3px;
  line-height: 1.45;
}
.hero .dynasty { color: var(--ink-mute); font-size: 17px; letter-spacing: 2px; margin-bottom: 22px; }
.hero .intro { color: var(--ink-soft); max-width: 32em; margin-bottom: 30px; }
.hero-stats { display: flex; gap: 36px; margin-bottom: 34px; }
.hero-stats .n { font-size: 30px; color: var(--cinnabar); }
.hero-stats .l { font-family: var(--f-sans); font-size: 12px; color: var(--ink-mute); letter-spacing: 2px; }
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; align-items: center; }
.hero-link { display: inline-block; }
.btn-ink {
  display: inline-block;
  padding: 12px 34px;
  border: 1px solid var(--ink);
  font-size: 15px; letter-spacing: 4px;
  transition: background .35s var(--ease), color .35s var(--ease);
}
.btn-ink:hover { background: var(--ink); color: var(--paper); }
.book-shelf {
  max-width: 1180px;
  margin: -24px auto 54px;
  padding: 0 clamp(20px, 6vw, 72px);
}
.section-kicker {
  font-family: var(--f-sans);
  font-size: 12px;
  letter-spacing: 4px;
  color: var(--cinnabar);
  margin-bottom: 16px;
}
.book-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 14px;
}
.book-card {
  display: grid;
  grid-template-columns: 58px 1fr;
  gap: 14px;
  align-items: center;
  width: 100%;
  min-height: 92px;
  padding: 12px;
  border: 1px solid var(--line);
  background: rgba(246,241,228,.55);
  color: var(--ink);
  text-align: left;
  cursor: pointer;
  font-family: var(--f-serif);
  transition: border-color .3s var(--ease), background .3s var(--ease), transform .3s var(--ease);
}
.book-card:hover {
  border-color: var(--cinnabar);
  background: rgba(166,58,36,.05);
  transform: translateY(-2px);
}
.book-cover {
  display: block;
  width: 58px;
  aspect-ratio: 3 / 4;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--paper-deep);
}
.book-cover img { width: 100%; height: 100%; object-fit: cover; }
.book-meta { display: grid; gap: 3px; min-width: 0; }
.book-title {
  font-size: 15px;
  line-height: 1.55;
  letter-spacing: 1px;
}
.book-sub {
  font-family: var(--f-sans);
  font-size: 12px;
  color: var(--ink-mute);
}

/* ============ 画廊 ============ */
.page-wrap { max-width: 1180px; margin: 0 auto; padding: clamp(28px, 5vh, 56px) clamp(20px, 6vw, 72px) 0; }
.page-title { font-size: 26px; letter-spacing: 4px; margin: 0 0 6px; font-weight: 600; }
.page-sub { color: var(--ink-mute); font-family: var(--f-sans); font-size: 13px; margin-bottom: 30px; }

.filter-row { display: flex; gap: 10px; margin-bottom: 12px; flex-wrap: wrap; align-items: center; }
.filter-row:last-of-type { margin-bottom: 30px; }
.filter-label { font-family: var(--f-sans); font-size: 12px; letter-spacing: 2px; color: var(--ink-mute); min-width: 52px; }
.filter-search {
  flex: 1; min-width: 180px; max-width: 360px;
  padding: 6px 14px; border: 1px solid var(--line); background: transparent;
  font-family: var(--f-serif); font-size: 14px; color: var(--ink);
}
.filter-search:focus { outline: none; border-color: var(--cinnabar); }
/* 图文互证 / 置信度 徽标 */
.g-badges { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 6px; }
.d-badges { display: flex; gap: 8px; flex-wrap: wrap; margin: 10px 0 4px; }
.g-badge {
  font-family: var(--f-sans); font-size: 11px; letter-spacing: 1px;
  padding: 2px 8px; border-radius: 2px; border: 1px solid var(--line); color: var(--ink-soft);
}
.g-badge.v-一致 { border-color: #4a7c59; color: #3c6b4a; background: rgba(74,124,89,.07); }
.g-badge.v-存疑 { border-color: #b08a2e; color: #8a6a1e; background: rgba(176,138,46,.08); }
.g-badge.v-矛盾 { border-color: var(--cinnabar); color: var(--cinnabar); background: rgba(166,58,36,.06); }
.g-badge.c-high { border-color: #4a7c59; color: #3c6b4a; }
.g-badge.c-mid  { border-color: var(--line); color: var(--ink-soft); }
.g-badge.c-low  { border-color: #b08a2e; color: #8a6a1e; }
.filter-chip {
  padding: 6px 20px;
  border: 1px solid var(--line);
  font-size: 14px; letter-spacing: 2px;
  color: var(--ink-soft);
  cursor: pointer;
  background: transparent;
  font-family: var(--f-serif);
  transition: border-color .3s var(--ease), color .3s var(--ease);
}
.filter-chip:hover { border-color: var(--cinnabar); color: var(--cinnabar); }
.filter-chip.on { border-color: var(--cinnabar); color: var(--cinnabar); background: rgba(166,58,36,.05); }
.filter-select {
  padding: 6px 14px; border: 1px solid var(--line); background: transparent;
  font-family: var(--f-serif); font-size: 14px; letter-spacing: 1px; color: var(--ink-soft);
  cursor: pointer; transition: border-color .3s var(--ease), color .3s var(--ease);
}
.filter-select:hover, .filter-select:focus { outline: none; border-color: var(--cinnabar); color: var(--cinnabar); }

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
  gap: clamp(18px, 3vw, 34px);
}
.g-card { cursor: pointer; }
.g-card .frame {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--paper-deep);
  aspect-ratio: 3 / 4;
}
.g-card .frame img {
  width: 100%; height: 100%; object-fit: cover;
  opacity: 0; transition: opacity .8s var(--ease), transform .8s var(--ease);
}
.g-card .frame img.loaded { opacity: 1; }
.g-card:hover .frame img { transform: scale(1.03); }
.g-card .tag {
  position: absolute; top: 10px; right: 10px;
  writing-mode: vertical-rl;
  background: rgba(246,241,228,.92);
  border: 1px solid var(--line);
  padding: 9px 5px;
  max-height: calc(100% - 20px);
  font-size: 14px; letter-spacing: 2px; color: var(--ink-soft);
}
.g-card .tag.video { color: var(--cinnabar); border-color: var(--cinnabar); }
.g-card .cap { margin-top: 12px; }
.g-card .cap .name { font-size: 17px; letter-spacing: 1px; }
.g-card .cap .meta { font-family: var(--f-sans); font-size: 12px; color: var(--ink-mute); margin-top: 2px; }

/* ============ 精选案例 ============ */
.featured-wrap { max-width: 1320px; }
.featured-stats {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin: -14px 0 28px;
  font-family: var(--f-sans);
  font-size: 12px;
  color: var(--ink-soft);
}
.featured-stats span {
  padding: 5px 11px;
  border: 1px solid var(--line);
  background: rgba(255,255,255,.18);
}
.featured-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(18px, 3vw, 34px);
}
.featured-card {
  display: grid;
  grid-template-columns: minmax(170px, .8fr) minmax(0, 1fr);
  min-height: 300px;
  border: 1px solid var(--line);
  background:
    linear-gradient(135deg, rgba(255,255,255,.18), rgba(239,231,211,.62)),
    var(--paper);
  cursor: pointer;
  overflow: hidden;
  transition: border-color .32s var(--ease), transform .32s var(--ease), box-shadow .32s var(--ease);
}
.featured-card:hover {
  border-color: var(--cinnabar);
  transform: translateY(-3px);
  box-shadow: 0 18px 40px rgba(83,62,32,.12);
}
.featured-media {
  position: relative;
  min-height: 300px;
  background: var(--paper-deep);
  overflow: hidden;
}
.featured-media img {
  width: 100%;
  height: 100%;
  min-height: 300px;
  object-fit: cover;
  opacity: 0;
  transition: opacity .8s var(--ease), transform .8s var(--ease);
}
.featured-media img.loaded { opacity: 1; }
.featured-card:hover .featured-media img { transform: scale(1.035); }
.featured-rank {
  position: absolute;
  top: 12px;
  left: 12px;
  padding: 3px 8px;
  border: 1px solid rgba(246,241,228,.9);
  background: rgba(34,26,16,.52);
  color: var(--paper);
  font-family: var(--f-sans);
  font-size: 12px;
  letter-spacing: 1px;
}
.featured-copy {
  padding: 22px clamp(18px, 2.8vw, 30px);
  min-width: 0;
}
.featured-copy .kicker {
  font-family: var(--f-sans);
  font-size: 11px;
  color: var(--cinnabar);
  letter-spacing: 1px;
  margin-bottom: 8px;
}
.featured-copy h2 {
  margin: 0 0 10px;
  font-size: clamp(22px, 2.6vw, 30px);
  line-height: 1.35;
}
.featured-copy p {
  margin: 14px 0 0;
  color: var(--ink-soft);
  font-size: 15px;
  line-height: 2;
}
.featured-copy blockquote {
  margin: 16px 0 0;
  padding: 7px 0 7px 14px;
  border-left: 2px solid var(--cinnabar);
  color: var(--ink-mute);
  font-size: 14px;
  line-height: 1.9;
}

/* ============ 工作流程 ============ */
.workflow-wrap {
  max-width: 1320px;
  margin: 0 auto;
  padding: clamp(30px, 6vh, 70px) clamp(20px, 6vw, 72px) 0;
}
.workflow-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 260px;
  gap: clamp(24px, 5vw, 76px);
  align-items: end;
  margin-bottom: 42px;
}
.workflow-hero h1 {
  max-width: 12em;
  margin: 4px 0 14px;
  font-size: clamp(34px, 5vw, 58px);
  line-height: 1.25;
  letter-spacing: 3px;
}
.workflow-hero p {
  max-width: 46em;
  margin: 0;
  color: var(--ink-soft);
}
.workflow-metrics {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 2px 14px;
  border: 1px solid var(--line);
  padding: 18px 20px;
  background: rgba(255,255,255,.16);
  font-family: var(--f-sans);
}
.workflow-metrics strong {
  color: var(--cinnabar);
  font-size: 28px;
  line-height: 1.2;
}
.workflow-metrics span {
  align-self: center;
  color: var(--ink-mute);
  font-size: 12px;
  letter-spacing: 1px;
}
.workflow-steps {
  position: relative;
  display: grid;
  grid-template-columns: repeat(6, minmax(150px, 1fr));
  gap: 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.workflow-step {
  min-height: 260px;
  padding: 22px 18px 24px;
  border-right: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(255,255,255,.15), rgba(239,231,211,.35));
}
.workflow-step:last-child { border-right: none; }
.workflow-step span {
  display: block;
  margin-bottom: 50px;
  font-family: var(--f-sans);
  font-size: 12px;
  color: var(--cinnabar);
}
.workflow-step h2 {
  margin: 0 0 10px;
  font-size: 19px;
  letter-spacing: 2px;
}
.workflow-step p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 14px;
  line-height: 1.9;
}
.workflow-proof {
  display: grid;
  grid-template-columns: minmax(260px, .72fr) minmax(0, 1fr);
  gap: clamp(24px, 4vw, 58px);
  margin-top: 48px;
  padding: 28px;
  border: 1px solid var(--line);
  background: rgba(255,255,255,.16);
}
.workflow-proof h2 {
  margin: 0 0 10px;
  font-size: 24px;
}
.workflow-proof p {
  color: var(--ink-soft);
  margin-bottom: 22px;
}
.workflow-strip {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 10px;
}
.workflow-strip button {
  padding: 0;
  border: 1px solid var(--line);
  background: var(--paper-deep);
  color: var(--ink);
  cursor: pointer;
  overflow: hidden;
  font-family: var(--f-serif);
  transition: border-color .3s var(--ease), transform .3s var(--ease);
}
.workflow-strip button:hover {
  border-color: var(--cinnabar);
  transform: translateY(-2px);
}
.workflow-strip img {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  opacity: 0;
  transition: opacity .8s var(--ease);
}
.workflow-strip img.loaded { opacity: 1; }
.workflow-strip span {
  display: block;
  padding: 6px 4px 8px;
  font-size: 12px;
  line-height: 1.4;
}

/* ============ 详情页 ============ */
.detail-wrap {
  display: grid;
  grid-template-columns: 92px minmax(300px, 1.1fr) minmax(280px, 1fr);
  gap: clamp(20px, 3.5vw, 48px);
  max-width: 1280px;
  margin: 0 auto;
  padding: clamp(24px, 4vh, 48px) clamp(20px, 5vw, 64px) 0;
}

/* 缩略图轨 */
.rail {
  position: sticky; top: 18px;
  align-self: start;
  max-height: calc(100vh - 60px);
  overflow-y: auto;
  scrollbar-width: thin;
  padding-right: 4px;
}
.rail-tile {
  position: relative;
  width: 100%;
  aspect-ratio: 3 / 4.4;
  border: 1px solid var(--line);
  background: var(--paper-deep);
  margin-bottom: 10px;
  cursor: pointer;
  overflow: hidden;
  transition: border-color .3s var(--ease);
}
.rail-tile img { width: 100%; height: 100%; object-fit: cover; }
.rail-tile .pn {
  position: absolute; bottom: 0; left: 0; right: 0;
  font-family: var(--f-sans); font-size: 10.5px; text-align: center;
  background: rgba(246,241,228,.9); color: var(--ink-soft);
  padding: 1px 0;
}
.rail-tile.cur { border-color: var(--cinnabar); box-shadow: 0 0 0 1px var(--cinnabar); }
.rail-tile.dim { opacity: .55; cursor: default; }
.rail-tile.dim:hover { opacity: .8; }
.rail-tile .ph {
  display: flex; align-items: center; justify-content: center;
  height: 100%; color: var(--ink-mute); font-size: 13px; letter-spacing: 1px;
  writing-mode: vertical-rl;
}

/* 主图列 */
.d-stage { min-width: 0; }
.d-frame {
  position: relative;
  border: 1px solid var(--line);
  background: var(--paper-deep);
  overflow: hidden;
}
.d-frame img, .d-frame video {
  width: 100%;
  opacity: 0; transition: opacity .8s var(--ease);
}
.d-frame img.loaded { opacity: 1; }
.d-frame .ai-corner {
  position: absolute; top: 12px; left: 12px;
  background: rgba(246,241,228,.95);
}
.frame-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 42px;
  height: 58px;
  border: 1px solid rgba(246,241,228,.82);
  background: rgba(34,26,16,.34);
  color: var(--paper);
  font-size: 38px;
  line-height: 1;
  cursor: pointer;
  opacity: .82;
  transition: opacity .25s var(--ease), background .25s var(--ease), transform .25s var(--ease);
}
.frame-nav:hover {
  opacity: 1;
  background: rgba(166,58,36,.78);
  transform: translateY(-50%) scale(1.04);
}
.frame-nav.prev { left: 12px; }
.frame-nav.next { right: 12px; }
.media-toggle { display: flex; gap: 0; margin-bottom: 14px; border: 1px solid var(--line); width: max-content; }
.media-toggle button {
  font-family: var(--f-serif);
  padding: 7px 22px;
  background: transparent; border: none;
  font-size: 14px; letter-spacing: 3px; color: var(--ink-soft);
  cursor: pointer;
  transition: background .3s var(--ease), color .3s var(--ease);
}
.media-toggle button.on { background: var(--ink); color: var(--paper); }
.video-pending {
  position: absolute; inset: 0;
  display: flex; flex-direction: column; gap: 10px;
  align-items: center; justify-content: center;
  background: rgba(34,26,16,.55);
  color: var(--paper);
  opacity: 1; transition: opacity .4s var(--ease);
}
.video-pending .play {
  width: 64px; height: 64px; border-radius: 50%;
  border: 1px solid var(--paper);
  display: flex; align-items: center; justify-content: center;
  font-size: 22px;
}
.video-pending .note { font-family: var(--f-sans); font-size: 12.5px; letter-spacing: 1px; }

.d-actions { display: flex; gap: 12px; margin-top: 16px; flex-wrap: wrap; }
.btn-line {
  font-family: var(--f-serif);
  padding: 9px 24px;
  border: 1px solid var(--line);
  background: transparent;
  font-size: 14px; letter-spacing: 2px; color: var(--ink-soft);
  cursor: pointer;
  transition: border-color .3s var(--ease), color .3s var(--ease);
}
.btn-line:hover { border-color: var(--cinnabar); color: var(--cinnabar); }

/* 信息列 */
.d-info { min-width: 0; }
.d-info .kicker { font-family: var(--f-sans); font-size: 11px; letter-spacing: 3px; color: var(--cinnabar); margin-bottom: 10px; }
.d-info h1 { margin: 0 0 4px; font-size: clamp(26px, 3vw, 34px); letter-spacing: 2px; font-weight: 600; }
.d-info .sub { color: var(--ink-mute); font-size: 14px; font-family: var(--f-sans); margin-bottom: 24px; }
.d-field { margin-bottom: 22px; }
.d-field .k {
  font-family: var(--f-sans); font-size: 11px; letter-spacing: 3px;
  color: var(--ink-mute); margin-bottom: 6px;
}
.d-field .v { color: var(--ink); font-size: 15px; }
.d-quote {
  border-left: 2px solid var(--cinnabar);
  padding: 4px 0 4px 16px;
  color: var(--ink-soft);
  font-size: 15px;
  line-height: 2.1;
}
.d-nav-row {
  display: flex; justify-content: space-between;
  margin-top: 34px; padding-top: 18px;
  border-top: 1px solid var(--line);
  font-size: 14px; color: var(--ink-soft);
}
.d-nav-row a:hover { color: var(--cinnabar); }

/* ============ 阅读器（查看原书页） ============ */
.reader[hidden], .lightbox[hidden] { display: none; }
.reader {
  position: fixed; inset: 0; z-index: 60;
  background: rgba(20, 15, 8, .9);
  display: flex; align-items: center; justify-content: center;
  padding: 4vh 4vw;
  animation: fade .35s var(--ease);
}
@keyframes fade { from { opacity: 0; } }
.reader-card {
  position: relative;
  max-width: min(820px, 92vw);
  max-height: 92vh;
  background: var(--paper);
  padding: 14px;
}
.reader-card .pg { position: relative; width: max-content; max-width: 100%; margin: 0 auto; }
.reader-card img { max-width: 100%; max-height: calc(92vh - 90px); margin: 0 auto; }
.reader-cap {
  display: flex; justify-content: space-between; align-items: center;
  padding: 10px 4px 0;
  font-family: var(--f-sans); font-size: 12.5px; color: var(--ink-soft);
}
.reader-close {
  background: none; border: none; cursor: pointer;
  font-family: var(--f-serif); font-size: 14px; letter-spacing: 2px; color: var(--ink-soft);
}
.reader-close:hover { color: var(--cinnabar); }
/* 插图位置高亮：墨迹晕开式描边，只播一次 */
.hl-box {
  position: absolute;
  border: 2px solid var(--cinnabar);
  box-shadow: 0 0 0 0 rgba(166,58,36,.45);
  animation: inkSpread 1.6s var(--ease) .3s 1 both;
  pointer-events: none;
}
@keyframes inkSpread {
  0%   { opacity: 0; box-shadow: 0 0 0 0 rgba(166,58,36,.45); }
  30%  { opacity: 1; }
  100% { opacity: 1; box-shadow: 0 0 0 14px rgba(166,58,36,0); }
}
.reader-missing {
  padding: 60px 40px; text-align: center; color: var(--ink-soft);
  font-size: 15px; line-height: 2.2;
}

/* ============ 灯箱 ============ */
.lightbox {
  position: fixed; inset: 0; z-index: 70;
  background: rgba(20,15,8,.93);
  display: flex; align-items: center; justify-content: center;
  cursor: zoom-out;
  animation: fade .3s var(--ease);
}
.lightbox img { max-width: 94vw; max-height: 94vh; }

/* ============ 关于页 ============ */
.about-wrap { max-width: 720px; margin: 0 auto; padding: clamp(30px, 6vh, 64px) 24px 0; }
.about-wrap h1 { font-size: 26px; letter-spacing: 4px; }
.about-wrap h2 { font-size: 18px; letter-spacing: 2px; margin-top: 40px; }
.about-wrap p { color: var(--ink-soft); }

/* ============ 响应式 ============ */
@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; }
  .book-shelf { margin-top: -10px; }
  .featured-grid,
  .featured-card,
  .workflow-hero,
  .workflow-proof { grid-template-columns: 1fr; }
  .workflow-steps {
    grid-template-columns: 1fr;
    border-bottom: none;
  }
  .workflow-step {
    min-height: auto;
    border-right: none;
    border-bottom: 1px solid var(--line);
  }
  .workflow-step span { margin-bottom: 18px; }
  .workflow-strip { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .detail-wrap { grid-template-columns: 1fr; }
  .rail {
    position: static; max-height: none;
    display: flex; gap: 10px; overflow-x: auto; padding-bottom: 6px;
  }
  .rail-tile { width: 64px; flex: 0 0 64px; margin-bottom: 0; }
  .frame-nav { width: 36px; height: 50px; font-size: 32px; }
}

/* ============ View Transitions（共享元素过渡） ============ */
::view-transition-old(hero-img), ::view-transition-new(hero-img) {
  animation-duration: .45s;
  animation-timing-function: var(--ease);
}

/* ============ 放映模式（精选案例全屏自动翻页） ============ */
.slideshow { position: fixed; inset: 0; z-index: 9999; background: var(--paper); display: flex; flex-direction: column; }
.ss-stage { flex: 1; min-height: 0; display: grid; grid-template-columns: 1fr 360px; gap: 36px; padding: 48px 72px; align-items: center; }
.ss-img { height: 100%; min-height: 0; display: flex; align-items: center; justify-content: center; }
.ss-photo { max-width: 100%; max-height: 100%; object-fit: contain; opacity: 0; transition: opacity .3s var(--ease); box-shadow: 0 8px 30px rgba(34,26,16,.18); }
.ss-photo.show { opacity: 1; }
.ss-copy { align-self: center; color: var(--ink); }
.ss-copy-inner { opacity: 0; transform: translateY(6px); transition: opacity .25s var(--ease), transform .25s var(--ease); }
.ss-copy-inner.show { opacity: 1; transform: none; }
.ss-kicker { font-family: var(--f-sans); font-size: 12px; letter-spacing: 2px; color: var(--ink-mute); }
.ss-copy h2 { font-family: var(--f-serif); font-size: 30px; margin: 6px 0 2px; color: var(--ink); font-weight: 600; }
.ss-copy .name-pinyin .py, .ss-copy .py { color: var(--ink-mute) !important; }
.ss-copy p { color: var(--ink-soft); line-height: 1.95; margin-top: 14px; font-size: 15px; }
.ss-copy blockquote { border-left: 3px solid var(--cinnabar); padding-left: 12px; margin: 14px 0 0; color: var(--ink-soft); font-family: var(--f-serif); line-height: 1.9; }
.ss-bar { height: 3px; background: rgba(34,26,16,.08); }
.ss-bar-fill { height: 100%; width: 0; background: var(--cinnabar); }
.ss-counter { position: absolute; left: 56px; bottom: 14px; color: var(--ink-mute); font-family: var(--f-sans); font-size: 13px; letter-spacing: 1px; }
.ss-hint { position: absolute; left: 50%; transform: translateX(-50%); bottom: 13px; color: var(--ink-mute); font-family: var(--f-sans); font-size: 12px; letter-spacing: 1px; }
.slideshow.paused .ss-hint::after { content: ' · 已暂停'; color: var(--cinnabar); }
.ss-close { position: absolute; top: 18px; right: 22px; width: 36px; height: 36px; border-radius: 50%; background: transparent; border: 1px solid var(--line); color: var(--ink-soft); cursor: pointer; font-size: 15px; transition: border-color .3s var(--ease), color .3s var(--ease); z-index: 2; }
.ss-close:hover { border-color: var(--cinnabar); color: var(--cinnabar); }
.ss-nav { position: absolute; top: 50%; transform: translateY(-50%); width: 44px; height: 64px; background: rgba(246,241,228,.7); border: 1px solid var(--line); color: var(--ink-soft); font-size: 30px; line-height: 1; cursor: pointer; z-index: 2; transition: border-color .3s var(--ease), color .3s var(--ease), background .3s var(--ease); }
.ss-nav:hover { border-color: var(--cinnabar); color: var(--cinnabar); background: var(--paper); }
.ss-prev { left: 14px; }
.ss-next { right: 14px; }
@media (max-width: 760px) {
  .ss-stage { grid-template-columns: 1fr; gap: 16px; padding: 40px 18px 28px; }
  .ss-copy { max-height: 36vh; overflow: auto; }
  .ss-copy h2 { font-size: 24px; }
  .ss-counter { left: 18px; }
}
@media (prefers-reduced-motion: reduce) {
  .ss-photo, .ss-copy-inner { transition: none; }
}