/* ═══════════════════════════════════════════════════════════════
   渊 · 视觉增强层 (visual enhancement layer)
   2026-10-08
   1. LQIP 低模占位，消除首屏黑屏
   2. 图片加载完成淡入
   3. 首屏向下提示
   4. 标题逐字浮现（墨点感）
   5. 章节卡层次与箭头
   6. 页脚
   7. 响应式与降级
   本文件独立于 styles.css，删除此文件与模板中的 link 即可完全回滚。
   ═══════════════════════════════════════════════════════════════ */

/* ── 1. LQIP 占位：图片未下载完时先铺一层极模糊低模图 ── */
.ink-hero.lqip-jianghu {
  background: #11191b url("data:image/webp;base64,UklGRnAAAABXRUJQVlA4IGQAAADQAwCdASoUAAkAPu1iqk2ppaQiMAgBMB2JZQCdABb0Ap8LZ+nuHgAA4CukajDAka9YMkOE1dcp9PGjvJgykjsg8B3GnKBBywY98CDKG9ZrJUcvb4oQZOWhxEPobRf/3/n+Y8AA") center/cover no-repeat;
}
.mood-card.lqip-mist-river {
  background: #172022 url("data:image/webp;base64,UklGRnQAAABXRUJQVlA4IGgAAACQAwCdASoUAAkAPu1kqU2ppaOiMAgBMB2JZQCdAArAcQ03zOIAAOArpFlXpDIdBLYQQsKprBvt3dsAQ0EPISAmP1A1Qj+v2F+asq+EH40we3Pf1jESsDbqsx0yHiueLmB4B+dGg7gAAA==") center/cover no-repeat;
}
.mood-card.lqip-river-valley {
  background: #172022 url("data:image/webp;base64,UklGRpgAAABXRUJQVlA4IIwAAACwBACdASoUABQAPu1ur1KppiQiqAgBMB2JZQC/7BF0Am1ry5mf3vkbkPYp91hQAP5V51OqaocCWshOt4bcXD+52B/ZZ6qZmyeVJTN0OKIpo4WHS81ao4rWvAnqkniGmk0fkwgD0UmFUlzlBVfXcxpasEeQBJeOWkBhhNdnzXJxUFKGXOG8cXluKYAAAA==") center/cover no-repeat;
}
.character-card.lqip-woman-writing {
  background: #172022 url("data:image/webp;base64,UklGRpIAAABXRUJQVlA4IIYAAACwBACdASoUABQAPu1urlKppiQiqAgBMB2JZwDKtArlHI6FQYwhPMI80tBNVXgAAP4+51cc9rq1IVL2HwwkOnCNRW3lc2Zutj5mFi5D2p4wMeVXnepGRHc2IrGY4vijwkTaDu3apc/4uSydOAtiw5jcBYBEfLx3irLO7flyYR59U5pvuIoAAA==") center/cover no-repeat;
}
.character-card.lqip-woman-bamboo {
  background: #172022 url("data:image/webp;base64,UklGRqwAAABXRUJQVlA4IKAAAAAQBQCdASoUABQAPu1ur1IppiQiqAgBMB2JZwCyzBBf+QG1h8uyn1aceC6XVwR9RMzgAP7e+hV5Cp8ruQbZTQUwd3q254ZbuOYyqDNJDH2izX5cOHG4ZIIMV0dyLN/61OX/VYCy82pw5+LKa4DzPXGP7b/ga9cqEKWkh7DXERMYRGa9wO9Zujvz3y7Q8o6I7Fr4M9XHjBKhj2rKzdja0AAA") center/cover no-repeat;
}
.character-card.lqip-woman-portrait {
  background: #172022 url("data:image/webp;base64,UklGRtAAAABXRUJQVlA4IMQAAADwBQCdASoUABsAPu1qr1CppiQiqAqpMB2JZwDE2ywAp51PG2zBG8AfjqKza+Xd8lYq4oyHC3xG7gDON1RvdZWOxdbPtjO2KWbB3DeXC1ynMN/ynCN9xq4bY3e+bNGCwePU+jSAFVNf2Wei29NaoTF6/9Jc/331vJEqdVy3XjwWscyQFxqh/+9g634v6IbvMeFEAmLZQATswgA1B8ON/sZyNU/hTZjhSgMdvIFI2BO8//zMY80UEt+zS7nHvZ7mIQRBsAAA") center/cover no-repeat;
}

/* ── 2. 图片加载完成淡入（LQIP 之上） ── */
.ink-home img[data-img-load] {
  opacity: 1;
  transition: opacity 620ms ease,
    transform 780ms cubic-bezier(0.2, 0.78, 0.2, 1),
    filter 420ms ease;
}
/* 首屏大图已有 clip-path 展开动画，不叠加透明度，避免双重隐藏 */
html.motion-ready .ink-home img[data-img-load]:not(.is-loaded):not(.ink-hero-bg) {
  opacity: 0;
}

/* ── 3. 首屏向下提示 ── */
.ink-hero-scroll {
  position: absolute;
  right: clamp(20px, 3vw, 44px);
  bottom: clamp(22px, 3vw, 42px);
  z-index: 2;
  display: grid;
  justify-items: center;
  gap: 10px;
  color: rgba(249, 241, 227, 0.68);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.24em;
  text-shadow: 0 3px 12px rgba(0, 0, 0, 0.5);
}
.ink-hero-scroll i {
  display: block;
  width: 1px;
  height: 48px;
  overflow: hidden;
  background: linear-gradient(180deg, rgba(217, 189, 133, 0.28), transparent);
  position: relative;
}
.ink-hero-scroll i::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent, rgba(217, 189, 133, 0.95));
  animation: scroll-hint 2.6s cubic-bezier(0.4, 0, 0.2, 1) infinite;
}
@keyframes scroll-hint {
  0% { transform: translateY(-100%); }
  55%, 100% { transform: translateY(100%); }
}

/* ── 4. 标题逐字浮现（由 motion.js 拆分字符） ── */
[data-split-text] .split-char {
  display: inline-block;
  opacity: 0;
  transform: translateY(0.4em);
  filter: blur(7px);
  transition: opacity 640ms ease,
    transform 820ms cubic-bezier(0.2, 0.78, 0.2, 1),
    filter 640ms ease;
  transition-delay: calc(var(--char-i, 0) * 42ms);
}
[data-motion-section].is-in-view [data-split-text] .split-char,
.motion-reduced [data-split-text] .split-char {
  opacity: 1;
  transform: translateY(0);
  filter: blur(0);
}

/* ── 5. 章节卡：序号、标题、悬停箭头 ── */
.chapter-card {
  position: relative;
}
.chapter-card .chapter-card-no {
  color: var(--jade);
}
.chapter-card .chapter-card-arrow {
  position: absolute;
  right: 18px;
  top: 50%;
  font-style: normal;
  font-size: 1.05rem;
  color: var(--gold);
  opacity: 0;
  transform: translate(-8px, -50%);
  transition: opacity 260ms ease, transform 340ms cubic-bezier(0.2, 0.78, 0.2, 1);
  pointer-events: none;
}
.chapter-card:hover .chapter-card-arrow,
.chapter-card:focus-visible .chapter-card-arrow {
  opacity: 1;
  transform: translate(0, -50%);
}

/* ── 6. 页脚 ── */
.ink-footer {
  margin-top: 34px;
  padding: clamp(26px, 4vw, 46px);
  color: rgba(238, 231, 218, 0.76);
  background: linear-gradient(180deg, #1c2729, #131c1e);
  border: 1px solid rgba(236, 226, 207, 0.16);
  box-shadow: 0 -10px 46px rgba(8, 15, 18, 0.2);
}
.ink-footer-inner {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: clamp(18px, 3vw, 40px);
}
.ink-footer-brand {
  display: flex;
  align-items: center;
  gap: 14px;
}
.ink-footer-brand strong {
  display: block;
  font-family: var(--font-serif, Georgia, "Noto Serif SC", "Songti SC", serif);
  font-size: 1.34rem;
  font-weight: 900;
  color: #f4ead6;
  letter-spacing: 0.08em;
}
.ink-footer-brand p {
  margin: 5px 0 0;
  font-size: 0.86rem;
  color: rgba(238, 231, 218, 0.6);
}
.ink-footer-meta {
  text-align: right;
  font-size: 0.8rem;
  line-height: 1.95;
}
.ink-footer-meta p {
  margin: 0;
}
.ink-footer-meta p:last-child {
  color: rgba(238, 231, 218, 0.48);
}
.ink-footer-top {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 20px;
  color: #eadfc6;
  font-size: 0.84rem;
  font-weight: 700;
  border: 1px solid rgba(217, 189, 133, 0.4);
  background: rgba(255, 255, 255, 0.04);
  cursor: pointer;
  white-space: nowrap;
  transition: background 240ms ease, border-color 240ms ease, transform 240ms ease;
}
.ink-footer-top span {
  font-size: 1rem;
  line-height: 1;
}
.ink-footer-top:hover,
.ink-footer-top:focus-visible {
  background: rgba(217, 189, 133, 0.16);
  border-color: rgba(217, 189, 133, 0.74);
  transform: translateY(-2px);
}
.ink-footer-top:active {
  transform: translateY(0);
}

/* ── 7. 响应式 ── */
@media (max-width: 820px) {
  .ink-footer-inner {
    grid-template-columns: 1fr;
    gap: 22px;
  }
  .ink-footer-meta {
    text-align: left;
  }
  .ink-hero-scroll {
    display: none;
  }
  .chapter-card .chapter-card-arrow {
    opacity: 1;
    transform: translate(0, -50%);
  }
}

/* ── 8. 动效降级 ── */
@media (prefers-reduced-motion: reduce) {
  [data-split-text] .split-char {
    opacity: 1 !important;
    transform: none !important;
    filter: none !important;
  }
  .ink-home img[data-img-load] {
    opacity: 1 !important;
  }
  .ink-hero-scroll i::after {
    animation: none;
  }
  .ink-footer-top:hover {
    transform: none;
  }
}

/* ── 9. 进入阅读页的墨迹过渡 ── */
.page-veil {
  position: fixed;
  inset: 0;
  z-index: 200;
  pointer-events: none;
  background: #131c1e;
  clip-path: circle(0% at var(--veil-x, 50%) var(--veil-y, 50%));
  transition: clip-path 420ms cubic-bezier(0.4, 0, 0.2, 1);
}
.page-leaving .page-veil {
  clip-path: circle(150% at var(--veil-x, 50%) var(--veil-y, 50%));
}
/* 内容淡出与墨迹扩散同步，避免中途出现纯黑空档 */
.page-leaving .site-shell {
  opacity: 0;
  transform: translateY(-8px);
  transition: opacity 420ms ease, transform 420ms ease;
}
@media (prefers-reduced-motion: reduce) {
  .page-veil {
    display: none;
  }
}

/* ═══════════════════════════════════════════════════════════════
   10. 阅读页增强
   ═══════════════════════════════════════════════════════════════ */

/* 首字下沉 */
.reader-article .chapter-content > p:first-of-type::first-letter {
  float: left;
  margin: 0.06em 0.14em 0 0;
  padding-top: 0.04em;
  font-family: var(--font-serif, Georgia, "Noto Serif SC", "Songti SC", serif);
  font-size: 3.05em;
  font-weight: 900;
  line-height: 0.84;
  color: var(--red);
}
.reader-theme-ink .reader-article .chapter-content > p:first-of-type::first-letter {
  color: var(--gold);
}

/* 章节末尾「继续阅读」引导 */
.reader-next-hint {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-top: 44px;
  padding: 20px 24px;
  border: 1px solid rgba(184, 145, 86, 0.34);
  background: linear-gradient(120deg, rgba(184, 145, 86, 0.12), rgba(184, 145, 86, 0.03));
  transition: border-color 260ms ease, transform 320ms cubic-bezier(0.2, 0.78, 0.2, 1),
    box-shadow 320ms ease;
}
.reader-next-hint span {
  flex: 0 0 auto;
  color: var(--muted);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.16em;
}
.reader-next-hint strong {
  flex: 1 1 auto;
  font-size: 1.05rem;
}
.reader-next-hint i {
  font-style: normal;
  font-size: 1.2rem;
  color: var(--gold);
  transition: transform 320ms cubic-bezier(0.2, 0.78, 0.2, 1);
}
.reader-next-hint:hover,
.reader-next-hint:focus-visible {
  border-color: rgba(184, 145, 86, 0.72);
  transform: translateX(4px);
  box-shadow: 0 16px 36px rgba(8, 15, 18, 0.12);
}
.reader-next-hint:hover i {
  transform: translateX(6px);
}

/* 键盘翻章提示 */
.reader-key-tip {
  margin-top: 22px;
  color: var(--muted);
  font-size: 0.78rem;
  text-align: center;
}
.reader-key-tip kbd {
  display: inline-block;
  min-width: 22px;
  margin: 0 2px;
  padding: 2px 6px;
  border: 1px solid rgba(24, 33, 38, 0.2);
  border-radius: 3px;
  background: rgba(255, 255, 255, 0.62);
  font-family: inherit;
  font-size: 0.74rem;
}

/* 阅读进度环 */
.reader-ring {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 60;
  width: 54px;
  height: 54px;
  display: grid;
  place-items: center;
  padding: 0;
  cursor: pointer;
  border-radius: 50%;
  background: rgba(255, 252, 245, 0.92);
  box-shadow: 0 12px 32px rgba(8, 15, 18, 0.16);
  opacity: 0;
  transform: translateY(10px);
  pointer-events: none;
  transition: opacity 320ms ease, transform 320ms ease, box-shadow 240ms ease;
}
.reader-body.reader-loaded .reader-ring {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}
.reader-ring:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
}
.reader-ring svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  transform: rotate(-90deg);
}
.reader-ring-track,
.reader-ring-fill {
  fill: none;
  stroke-width: 3;
}
.reader-ring-track {
  stroke: rgba(24, 33, 38, 0.12);
}
.reader-ring-fill {
  stroke: var(--gold);
  stroke-linecap: round;
  transition: stroke-dashoffset 180ms linear;
}
.reader-ring > span {
  position: relative;
  font-size: 0.68rem;
  font-weight: 900;
  letter-spacing: 0;
  color: var(--muted);
}
.reader-theme-ink .reader-ring {
  background: rgba(24, 32, 34, 0.92);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.42);
}
.reader-theme-ink .reader-ring-track {
  stroke: rgba(240, 232, 216, 0.16);
}
.reader-theme-ink .reader-ring > span {
  color: rgba(240, 232, 216, 0.72);
}

/* 阅读页章节切换：与首页墨迹过渡时长对齐 */
.motion-ready .reader-body.reader-leaving .reader-article {
  opacity: 0;
  transform: translateY(-10px);
  transition: opacity 380ms ease, transform 380ms ease;
}

@media (max-width: 640px) {
  .reader-ring {
    right: 14px;
    bottom: 84px;
    width: 48px;
    height: 48px;
  }
  .reader-next-hint {
    flex-wrap: wrap;
    gap: 10px;
    padding: 16px 18px;
  }
  .reader-key-tip {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .reader-body.reader-loaded .reader-ring {
    transform: none;
  }
  .reader-next-hint:hover {
    transform: none;
  }
}