/* JOOYA · 视觉与交互增强 v2 visual-v2.css
   补充：megamenu / 第二配色方案 / 微交互 / 视差 / Loading / Empty / icon 系统 */

/* ─── Megamenu ─── */
.masthead .nav-left a, .masthead .nav-right a { position: relative; }
.jy-megamenu-trigger { position: relative; }
.jy-megamenu {
  position: absolute; top: 100%; left: 0;
  min-width: 480px;
  background: var(--paper); border: 1px solid var(--ink);
  border-top: 3px solid var(--crimson);
  padding: 24px 28px;
  display: none; z-index: 49;
  box-shadow: 0 12px 36px rgba(0,0,0,0.1);
}
.jy-megamenu-trigger:hover > .jy-megamenu { display: block; }
.jy-megamenu .col { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.jy-megamenu .group h5 {
  font-family: "JetBrains Mono", monospace;
  font-size: 10px; letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--ink-3); padding-bottom: 8px; border-bottom: 1px solid var(--rule);
  margin-bottom: 10px;
}
.jy-megamenu .group a {
  display: block; padding: 5px 0;
  font-family: "Noto Serif SC", serif; font-size: 13.5px;
  color: var(--ink-2); border: 0;
}
.jy-megamenu .group a:hover { color: var(--crimson); }
.jy-megamenu .group a span {
  display: block; font-family: "JetBrains Mono", monospace;
  font-size: 10px; color: var(--ink-3); margin-top: 1px;
}

/* ─── 第二配色方案 · 纯白版 ─── */
body[data-theme="pure-white"] {
  --paper: #ffffff;
  --paper-2: #f6f6f4;
  --paper-3: #ebebe8;
  --ink: #0a0a0a;
  --rule: #e0e0dc;
  --crimson: #c91414;
  --ochre: #888;
}

/* ─── 微交互 · 按钮 ripple ─── */
.btn, button.btn, .jy-btn-primary, .jy-btn-ghost {
  position: relative; overflow: hidden; transform: translateZ(0);
}
.btn:active, button.btn:active { transform: scale(0.97); }
.btn::after, button.btn::after {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(circle, currentColor 0%, transparent 60%);
  opacity: 0; pointer-events: none;
  transition: opacity 0.3s;
}
.btn:hover::after, button.btn:hover::after { opacity: 0.08; }

/* ─── Hero 视差滚动 ─── */
.hero { position: relative; overflow: hidden; }
.hero::before {
  content: ""; position: absolute;
  inset: -20% -10% -10% -10%;
  background: radial-gradient(ellipse at 20% 30%, rgba(139,47,47,0.04), transparent 60%);
  pointer-events: none;
  z-index: 0;
}
.hero > * { position: relative; z-index: 1; }
@keyframes jy-float-slow { 0%,100%{transform:translateY(0)} 50%{transform:translateY(-8px)} }

/* ─── Loading · 骨架屏 ─── */
.jy-skeleton {
  background: linear-gradient(90deg, var(--paper-2) 0%, var(--paper-3) 50%, var(--paper-2) 100%);
  background-size: 200% 100%;
  animation: jy-shimmer 1.4s linear infinite;
}
@keyframes jy-shimmer { 0%{background-position:200% 0} 100%{background-position:-200% 0} }
.jy-skeleton-line { height: 14px; margin-bottom: 8px; border-radius: 2px; }
.jy-skeleton-line.title { height: 22px; width: 70%; }
.jy-skeleton-line.subtitle { width: 90%; }
.jy-skeleton-line.short { width: 40%; }

/* ─── Empty State ─── */
.jy-empty {
  text-align: center; padding: 80px 40px;
  background: var(--paper-2); border: 1px dashed var(--rule);
  margin: 24px 0;
}
.jy-empty .ic-empty {
  font-family: "Cormorant Garamond", serif; font-style: italic;
  font-size: 80px; color: var(--ink-3); line-height: 0.9;
  margin-bottom: 14px;
}
.jy-empty h3 { font-family: "Noto Serif SC", serif; font-size: 22px; margin-bottom: 8px; }
.jy-empty p { font-family: "Cormorant Garamond", serif; font-size: 15px; color: var(--ink-3); max-width: 420px; margin: 0 auto; }
.jy-empty .actions { margin-top: 20px; display: flex; gap: 8px; justify-content: center; }

/* ─── 图标系统统一 · 线性 ─── */
.jy-ic {
  display: inline-block; vertical-align: middle;
  font-family: "JetBrains Mono", monospace;
  width: 18px; height: 18px; line-height: 18px;
  text-align: center; font-size: 13px;
  color: var(--ink-3);
}
.jy-ic.crimson { color: var(--crimson); }

/* ─── 分享 / 收藏 / 笔记工具栏 (article) ─── */
.jy-article-tools {
  position: sticky; top: 80px;
  display: flex; flex-direction: column; gap: 6px;
  float: left; margin-left: -76px; margin-right: 12px;
  z-index: 40;
}
.jy-article-tools .t {
  width: 40px; height: 40px;
  border: 1px solid var(--rule); background: var(--paper);
  font-size: 16px; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: all 0.15s;
}
.jy-article-tools .t:hover { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.jy-article-tools .t .count {
  display: block; font-family: "JetBrains Mono", monospace;
  font-size: 9px; color: var(--ink-3); margin-top: -2px; font-weight: 600;
}
@media (max-width: 1400px) { .jy-article-tools { display: none; } }

/* ─── 上一篇 / 下一篇 (article) ─── */
.jy-prev-next {
  display: grid; grid-template-columns: 1fr 1fr; gap: 0;
  border-top: 2px solid var(--ink); margin-top: 56px;
}
.jy-prev-next .nav-link {
  padding: 22px 24px; cursor: pointer; transition: all 0.15s;
  border-right: 1px solid var(--rule);
}
.jy-prev-next .nav-link:last-child { border-right: 0; }
.jy-prev-next .nav-link:hover { background: var(--paper-2); }
.jy-prev-next .nav-link.next { text-align: right; }
.jy-prev-next .lb {
  font-family: "JetBrains Mono", monospace;
  font-size: 10px; letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--crimson); margin-bottom: 6px;
}
.jy-prev-next .ttl {
  font-family: "Noto Serif SC", serif; font-weight: 700;
  font-size: 16px; line-height: 1.35;
}

/* ─── 滚动渐入 ─── */
.jy-reveal {
  opacity: 0; transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.jy-reveal.in { opacity: 1; transform: translateY(0); }

/* ─── 暗色模式适配增强 ─── */
body[data-mode="dark"] .jy-megamenu { background: var(--paper-2); border-color: var(--rule); }
body[data-mode="dark"] .jy-megamenu .group a { color: var(--ink-2); }
body[data-mode="dark"] .jy-empty { background: var(--paper-2); border-color: var(--rule); }
body[data-mode="dark"] .jy-article-tools .t { background: var(--paper-2); border-color: var(--rule); color: var(--ink-2); }
body[data-mode="dark"] .jy-prev-next .nav-link:hover { background: var(--paper-2); }

/* ═══ 精修批1 · D1 letterpress 错版硬投影下放共享承重类（2026-06-13）
   覆盖 site-enhance.css:229 的模糊软投影；把首页签名指纹延续到内页。
   标准重磅卡=静态极轻赭金错版；密排网格卡=hover 才上墨错版（防密排一片投影杂乱）。 ═══ */
.case, .partner, .authority-card, .acard, .reco .r, .demo-cell, .tcard, .fig {
  box-shadow: 3px 3px 0 color-mix(in srgb, var(--ochre) 18%, transparent);
  transition: transform .28s var(--ease, ease), box-shadow .28s var(--ease, ease), border-color .28s var(--ease, ease);
}
.case:hover, .partner:hover, .authority-card:hover, .acard:hover, .reco .r:hover, .demo-cell:hover, .tcard:hover {
  transform: translateY(-2px);
  box-shadow: 6px 6px 0 color-mix(in srgb, var(--ochre) 26%, transparent);
}
/* 密排网格/可点卡：静态无投影，hover 上墨错版 + 两段式抬起 */
.pain, .cluster, .icell, .output {
  transition: transform .28s var(--ease, ease), box-shadow .28s var(--ease, ease), background .28s var(--ease, ease), color .28s var(--ease, ease);
}
.pain:hover, .cluster:hover, .icell:hover, .output:hover {
  transform: translateY(-2px);
  box-shadow: 4px 5px 0 var(--ink);
}
/* P2 · .pain 分离独立卡：静态赭金错版钤印（卡 em=赭金）+ 两段式抬起（覆盖上面的墨色 hover） */
.pain { box-shadow: 3px 3px 0 color-mix(in srgb, var(--ochre) 16%, transparent); }
.pain:hover {
  transform: translateY(-2px);
  box-shadow: 6px 7px 0 color-mix(in srgb, var(--ochre) 24%, transparent);
}
/* P4 · 可进入态：a.pain（App I/II/III 链接卡）更强赭金描边发光 + CTA 箭头位移，区别于陈述卡 */
a.pain:hover { border-color: var(--ochre); box-shadow: 6px 7px 0 var(--ochre); }
a.pain .panswer b { transition: padding-left .28s var(--ease, ease); }
a.pain:hover .panswer b { padding-left: 6px; }
/* AI 摘要暗块：墨色错版（守暗底语义） */
.ai-sum { box-shadow: 6px 6px 0 color-mix(in srgb, var(--ink) 16%, transparent); }