/* ============================================================
   BLANK-NOT-BLACK // PERSONAL ARCHIVE
   新复古主义 · 神性 × 机械 · 克莱因蓝单色印刷
   纸白底 + 蓝图蓝 + 衬线巨标题 + 等宽技术标注 + 半调网点
   ============================================================ */

:root {
  --paper: #f5f4ee;          /* 纸白 */
  --paper-2: #efeee6;        /* 略深的纸 */
  --ink: #0b1fa8;            /* 克莱因蓝图蓝 */
  --ink-deep: #081585;       /* 深蓝 */
  --ink-soft: rgba(11, 31, 168, 0.55);
  --ink-faint: rgba(11, 31, 168, 0.28);
  --ink-line: rgba(11, 31, 168, 0.35);
  --ink-hairline: rgba(11, 31, 168, 0.18);

  --serif: "Noto Serif SC", "Songti SC", "STSong", Georgia,
    "Times New Roman", "SimSun", serif;
  --mono: ui-monospace, "Cascadia Mono", "JetBrains Mono", Consolas,
    "SF Mono", Menlo, monospace;
  --sans: system-ui, -apple-system, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;

  --max: 64rem;
  --rule: 1px solid var(--ink-line);
  --hairline: 1px solid var(--ink-hairline);
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  position: relative;   /* 定位上下文：让 .page-boxes 随文档铺满整页 */
  font-family: var(--serif);
  background: var(--paper);
  color: var(--ink);
  line-height: 1.9;
  overflow-x: hidden;
  /* 纸面细网格 */
  background-image:
    linear-gradient(var(--ink-hairline) 1px, transparent 1px),
    linear-gradient(90deg, var(--ink-hairline) 1px, transparent 1px);
  background-size: 56px 56px;
  background-position: center top;
}

::selection { background: var(--ink); color: var(--paper); }

/* 眼睛光标只在精细指针且未请求减少动态效果时启用；其余场景保留系统光标。 */
@media (pointer: fine) and (hover: hover) {
  html.has-eye-cursor,
  html.has-eye-cursor body,
  html.has-eye-cursor a,
  html.has-eye-cursor button,
  html.has-eye-cursor summary,
  html.has-eye-cursor input,
  html.has-eye-cursor select,
  html.has-eye-cursor textarea,
  html.has-eye-cursor [role="button"] { cursor: none; }
}

.eye-cursor {
  position: fixed;
  top: 0;
  left: 0;
  width: 36px;
  height: 27px;
  margin: -13.5px 0 0 -18px;   /* 瞳孔中心对准指针 */
  pointer-events: none;
  z-index: 9999;
  will-change: transform;
}
.eye-cursor canvas { display: block; width: 36px; height: 27px; image-rendering: pixelated; }
/* 泛红时红光搏动（颜色/血丝/故障都在 canvas 像素里画） */
.eye-cursor.red { animation: redThrob 0.85s ease-in-out infinite; }
@keyframes redThrob {
  0%, 100% { filter: drop-shadow(0 0 2px rgba(178, 24, 16, 0.45)); }
  50% { filter: drop-shadow(0 0 9px rgba(200, 26, 18, 0.95)); }
}

a { color: var(--ink); text-decoration: none; }
a:hover { color: var(--ink-deep); }

:where(a, button, summary, select):focus-visible {
  outline: 3px solid var(--ink);
  outline-offset: 4px;
}

.container { max-width: var(--max); margin: 0 auto; padding: 0 1.5rem; }

.mono { font-family: var(--mono); }

/* ---------------- 顶部刊头 MASTHEAD ---------------- */
.masthead {
  border-bottom: 2px solid var(--ink);
  padding: 1.1rem 0 0.9rem;
  background: var(--paper);
  position: relative;
  z-index: 5;
}

.masthead-inner {
  display: flex;
  align-items: baseline;
  gap: 1.2rem;
  flex-wrap: wrap;
}

.masthead .brand {
  font-family: var(--serif);
  font-weight: 900;
  font-size: 1.35rem;
  letter-spacing: 0.04em;
  color: var(--ink);
}

.masthead .brand:hover { color: var(--ink-deep); }

.masthead .issue {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin-left: auto;
}

/* ---------------- 导航 ---------------- */
.site-nav {
  border-bottom: var(--hairline);
  background: var(--paper);
  position: sticky;
  top: 0;
  z-index: 20;
}

.nav-inner {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  min-height: 3rem;
  flex-wrap: wrap;
}

.site-nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-nav a.nav-link {
  display: block;
  padding: 0.45rem 1.05rem;
  font-family: var(--mono);
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  color: var(--ink-soft);
  border-left: var(--hairline);
  transition: background 0.15s ease, color 0.15s ease;
}

.site-nav li:first-child a.nav-link { border-left: none; }

.site-nav a.nav-link:hover { background: var(--paper-2); color: var(--ink); }

.site-nav a.nav-link.active {
  background: var(--ink);
  color: var(--paper);
}

/* ---------------- 英雄区 HERO ---------------- */
.hero {
  position: relative;
  border-bottom: 2px solid var(--ink);
  overflow: hidden;
  background: var(--paper);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 0;
  align-items: stretch;
}

.hero-text {
  padding: 3.4rem 2.5rem 3rem 0;
  border-right: var(--hairline);
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.hero-eyebrow {
  display: flex;
  gap: 0.8rem;
  align-items: center;
  margin-bottom: 1.4rem;
  flex-wrap: wrap;
}

.tag {
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--ink-soft);
  border: 1px solid var(--ink-line);
  padding: 0.2rem 0.6rem;
}

.tag.solid { background: var(--ink); color: var(--paper); border-color: var(--ink); }

.hero-title {
  margin: 0;
  position: relative;   /* 让标题周围的荒诞框相对标题定位 */
  font-family: var(--serif);
  font-weight: 900;
  font-size: clamp(2.6rem, 7vw, 4.6rem);
  line-height: 1.04;
  letter-spacing: 0.01em;
  color: var(--ink);
}

.hero-title .en {
  display: block;
  font-family: var(--mono);
  font-size: 0.3em;
  font-weight: 400;
  letter-spacing: 0.42em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin-bottom: 0.9rem;
}

.hero-sub {
  margin: 1.3rem 0 0;
  max-width: 30rem;
  font-size: 1.05rem;
  color: var(--ink);
  line-height: 1.85;
}

.hero-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.9rem 1.2rem;
  margin-top: 1.5rem;
}

.hero-actions .btn { padding: 0.72rem 1.2rem; }

.text-link {
  font-family: var(--mono);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  border-bottom: 1px solid var(--ink-line);
}

.text-link:hover { border-bottom-color: var(--ink); }

.hero-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1rem;
  margin: 1rem 0 0;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.05em;
  color: var(--ink-soft);
}

.hero-facts span + span::before { content: "//"; margin-right: 1rem; color: var(--ink-faint); }

.hero-fig {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  min-height: 22rem;
}

.hero-fig img { max-width: 100%; height: auto; display: block; }

.hero-fig .fig-cap {
  position: absolute;
  bottom: 0.7rem;
  left: 1rem;
  font-family: var(--mono);
  font-size: 0.64rem;
  letter-spacing: 0.2em;
  color: var(--ink-soft);
  text-transform: uppercase;
}

/* 整页大图英雄（首页用） */
.hero-full { position: relative; text-align: center; padding: 2.5rem 0 0; }
.hero-full .hero-title { padding: 0 1rem; }
.hero-full .hero-sub { margin-left: auto; margin-right: auto; }
.hero-full .fig-wrap { margin-top: 2rem; border-top: 0; }
.hero-full .fig-wrap img { width: 100%; height: 100%; object-fit: cover; display: block; }

/* ---------------- 主体 ---------------- */
main { padding: 2.8rem 0 4rem; min-height: 60vh; }

/* 节标题：编号 + 巨衬线 + 英文小字 + 细线 */
.sec-head {
  display: flex;
  align-items: baseline;
  position: relative;   /* 让标题周围的荒诞框相对标题定位 */
  gap: 1rem;
  margin: 3rem 0 1.6rem;
  border-bottom: 2px solid var(--ink);
  padding-bottom: 0.6rem;
}

.sec-head:first-child { margin-top: 0; }

.sec-no {
  font-family: var(--mono);
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: 0.1em;
}

.sec-no::before { content: "№ "; color: var(--ink-soft); }

.sec-title {
  margin: 0;
  font-family: var(--serif);
  font-size: 1.9rem;
  font-weight: 900;
  letter-spacing: 0.02em;
  color: var(--ink);
}

.sec-en {
  margin-left: auto;
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--ink-soft);
  white-space: nowrap;
}

/* ---------------- 卡片（栏目） ---------------- */
.card-grid { display: grid; gap: 0; grid-template-columns: 1fr; border: var(--rule); }

.card {
  position: relative;
  display: block;
  padding: 1.8rem 1.7rem 1.5rem;
  border-bottom: var(--rule);
  background: var(--paper);
  transition: background 0.18s ease;
}

.card:last-child { border-bottom: none; }

.card:hover { background: var(--paper-2); }

.card .card-no {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.22em;
  color: var(--ink-soft);
  text-transform: uppercase;
}

.card .card-en {
  display: block;
  font-family: var(--mono);
  font-size: 0.62rem;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-top: 0.2rem;
}

.card h2, .card h3 {
  margin: 0.5rem 0 0.5rem;
  font-family: var(--serif);
  font-size: 1.7rem;
  font-weight: 900;
  color: var(--ink);
}

.card h2 a, .card h3 a { color: var(--ink); }
.card h2 a:hover, .card h3 a:hover { color: var(--ink-deep); }

.card p { margin: 0; color: var(--ink); font-size: 0.98rem; line-height: 1.8; }

.card .go {
  position: absolute;
  right: 1.4rem;
  top: 1.7rem;
  font-family: var(--mono);
  font-size: 1.1rem;
  color: var(--ink-faint);
  transition: color 0.15s ease, transform 0.15s ease;
}

.card:hover .go { color: var(--ink); transform: translateX(4px); }

/* ---------------- 通告 / 高亮 ---------------- */
.notice {
  position: relative;
  border: var(--rule);
  background: var(--paper);
  padding: 1.7rem 1.8rem;
  border-left: 4px solid var(--ink);
}

.notice .tag { display: inline-block; margin-bottom: 0.7rem; }
.notice p { margin: 0.5rem 0 0; }
.notice a { font-weight: 700; border-bottom: 1px solid var(--ink-line); }
.notice a:hover { border-bottom-color: var(--ink); }

/* ---------------- 更新日志（编年史） ---------------- */
.log-list { border-left: 2px solid var(--ink); margin-left: 0.4rem; }

.log-entry {
  position: relative;
  padding: 1.3rem 1.5rem 1.3rem 2rem;
  border-bottom: var(--hairline);
  transition: background 0.15s ease;
}

.log-entry:last-child { border-bottom: none; }

.log-entry::before {
  content: "";
  position: absolute;
  left: -7px;
  top: 1.9rem;
  width: 12px;
  height: 12px;
  background: var(--paper);
  border: 2px solid var(--ink);
  border-radius: 50%;
}

.log-entry:hover { background: var(--paper-2); }

.log-entry.latest { background: var(--paper-2); }
.log-entry.latest::before { background: var(--ink); }

.log-entry details { margin: 0; }

.log-head {
  display: grid;
  grid-template-columns: auto auto auto minmax(12rem, 1fr) auto;
  align-items: baseline;
  gap: 0.5rem 0.9rem;
  cursor: pointer;
  list-style: none;
}

.log-head::-webkit-details-marker { display: none; }

.log-version { grid-column: 1; }
.log-date { grid-column: 2; }
.log-badge { grid-column: 3; }
.log-summary { grid-column: 4; }

.log-head::after {
  content: "+";
  grid-column: 5;
  grid-row: 1;
  align-self: center;
  font-family: var(--mono);
  font-size: 1rem;
  color: var(--ink-soft);
}

.log-entry details[open] .log-head::after { content: "−"; }

.log-version {
  font-family: var(--mono);
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--ink);
  letter-spacing: 0.03em;
}

.log-badge {
  font-family: var(--mono);
  font-size: 0.62rem;
  letter-spacing: 0.26em;
  padding: 0.14rem 0.55rem;
  background: var(--ink);
  color: var(--paper);
  text-transform: uppercase;
}

.log-date {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
  white-space: nowrap;
}

.log-summary {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--ink);
}

.log-notes {
  margin: 0.85rem 0 0.2rem;
  padding: 0 0 0 1.2rem;
}

.log-notes li {
  margin: 0.45rem 0;
  padding-left: 0.25rem;
  font-size: 0.95rem;
  line-height: 1.8;
}

.log-notes strong {
  font-family: var(--mono);
  font-size: 0.76rem;
  letter-spacing: 0.08em;
}

.log-entry p {
  margin: 0.6rem 0 0;
  color: var(--ink);
  font-size: 0.95rem;
  line-height: 1.85;
  white-space: pre-wrap;
  overflow-wrap: break-word;
}

/* ---------------- 按钮 ---------------- */
.downloads { display: flex; flex-wrap: wrap; gap: 1rem; margin-top: 1.6rem; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.85rem 1.7rem;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--mono);
  font-weight: 700;
  font-size: 0.9rem;
  letter-spacing: 0.08em;
  border: 1px solid var(--ink);
  transition: background 0.15s ease, color 0.15s ease, transform 0.15s ease;
}

.btn::after { content: "→"; font-family: var(--mono); transition: transform 0.15s ease; }

.btn:hover { background: var(--ink-deep); color: var(--paper); transform: translateY(-2px); }
.btn:hover::after { transform: translateX(4px); }

.btn.secondary { background: var(--ink-deep); border-color: var(--ink-deep); }
.btn.secondary:hover { background: var(--ink); }

.btn.ghost { background: transparent; color: var(--ink); border-color: var(--ink-line); }
.btn.ghost:hover { background: var(--paper-2); color: var(--ink-deep); border-color: var(--ink); }

/* ---------------- 特性列表 ---------------- */
.feature-list { list-style: none; padding: 0; margin: 0; }

.feature-list li {
  position: relative;
  padding: 0.8rem 0 0.8rem 2rem;
  border-bottom: var(--hairline);
  color: var(--ink);
  line-height: 1.85;
}

.feature-list li:last-child { border-bottom: none; }

.feature-list li::before {
  content: "◆";
  position: absolute;
  left: 0.2rem;
  top: 0.8rem;
  color: var(--ink);
  font-size: 0.8rem;
}

.feature-list strong { color: var(--ink); font-weight: 700; }

/* ---------------- 产品截图 ---------------- */
.product-shots {
  display: grid;
  gap: 1.2rem;
  grid-template-columns: 1fr;
  margin-top: 1.6rem;
}

.shot-frame {
  margin: 0;
  border: var(--rule);
  background: var(--paper);
  overflow: hidden;
}

.shot-frame img { display: block; width: 100%; height: auto; border-bottom: var(--hairline); }

.shot-frame figcaption {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--ink-soft);
  padding: 0.6rem 0.9rem;
  text-transform: uppercase;
}

.shot-frame figcaption::before { content: "FIG. "; color: var(--ink); }

/* ---------------- 面包屑 ---------------- */
.breadcrumb {
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  color: var(--ink-faint);
  margin: 0 0 1.8rem;
  text-transform: uppercase;
}

.breadcrumb a { color: var(--ink-soft); }
.breadcrumb a:hover { color: var(--ink); }
.breadcrumb .sep { margin: 0 0.5rem; color: var(--ink-faint); }

/* ---------------- 文章正文 ---------------- */
article.prose p { margin: 0 0 1.1em; overflow-wrap: break-word; line-height: 1.95; }

.coffee-meta {
  font-family: var(--mono);
  font-size: 0.82rem;
  color: var(--ink-soft);
  letter-spacing: 0.08em;
  margin: 0 0 1.6rem;
  text-transform: uppercase;
}

/* 目录 */
details.toc {
  border: var(--rule);
  background: var(--paper);
  padding: 1rem 1.4rem;
  margin: 0 auto 1rem;
  max-width: 46rem;
}

details.toc summary {
  cursor: pointer;
  font-family: var(--serif);
  font-weight: 900;
  font-size: 1.15rem;
  letter-spacing: 0.04em;
  color: var(--ink);
  list-style: none;
}

details.toc summary::before { content: "▸ "; font-family: var(--mono); color: var(--ink-soft); }
details.toc[open] summary::before { content: "▾ "; }

details.toc ol {
  columns: 2;
  column-gap: 2.5rem;
  margin: 1rem 0 0.3rem;
  padding-left: 1.3rem;
  font-family: var(--mono);
}

details.toc li { margin-bottom: 0.25rem; }
details.toc a { color: var(--ink-soft); }
details.toc a:hover { color: var(--ink); }

/* 章节标题：大编号 */
.chapter-title {
  display: flex;
  align-items: baseline;
  gap: 1.1rem;
  margin: 3.4rem 0 1.5rem;
  padding-top: 1.8rem;
  border-top: 2px solid var(--ink);
  font-family: var(--serif);
  font-size: 2.4rem;
  font-weight: 900;
  color: var(--ink);
  letter-spacing: 0.04em;
}

.chapter-title::before {
  content: "CH.";
  font-family: var(--mono);
  font-size: 0.85rem;
  letter-spacing: 0.32em;
  color: var(--ink-soft);
}

.chapter-title::after {
  content: "";
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--ink-line), transparent);
  align-self: center;
}

/* 《咖啡》正文 */
article.coffee {
  max-width: 46rem;
  margin: 0 auto;
  font-size: 1.04rem;
}

article.coffee p {
  text-indent: 2em;
  margin: 0 0 1.1em;
  white-space: pre-wrap;
  overflow-wrap: break-word;
  word-break: break-word;
  line-height: 2;
}

.coffee-meta {
  max-width: 46rem;
  margin-left: auto;
  margin-right: auto;
}

.reader-toolbar {
  position: sticky;
  top: 3.15rem;
  z-index: 12;
  display: flex;
  align-items: center;
  gap: 0.8rem;
  max-width: 46rem;
  margin: 0 auto 2rem;
  padding: 0.65rem 0.8rem;
  border: var(--rule);
  background: rgba(245, 244, 238, 0.96);
  backdrop-filter: blur(8px);
  box-shadow: 0 0.35rem 1rem rgba(8, 21, 133, 0.06);
}

.reader-toolbar label,
.reader-current,
.reader-toc-link {
  font-family: var(--mono);
  font-size: 0.74rem;
  letter-spacing: 0.06em;
}

.reader-toolbar select {
  min-height: 2.25rem;
  padding: 0.35rem 2rem 0.35rem 0.65rem;
  border: 1px solid var(--ink-line);
  border-radius: 0;
  background: var(--paper);
  color: var(--ink);
  font: 700 0.8rem var(--mono);
}

.reader-current { margin-left: auto; color: var(--ink-soft); white-space: nowrap; }
.reader-toc-link { font-weight: 700; border-bottom: 1px solid var(--ink-line); }

.chapter-title { scroll-margin-top: 7rem; }

.chapter-links {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 1rem;
  margin: 2.6rem 0 0;
  padding: 1rem 0;
  border-top: var(--hairline);
  font-family: var(--mono);
  font-size: 0.78rem;
}

.chapter-links a:last-child { justify-self: end; }
.chapter-links .toc-return { color: var(--ink-soft); }
.chapter-links .is-placeholder { visibility: hidden; }

article.coffee p.empty { min-height: 0.5em; margin: 0; text-indent: 0; }
article.coffee p:first-of-type { text-indent: 0; }
article.coffee p.signature { text-indent: 0; color: var(--ink-soft); }
article.coffee .signature { margin-top: 2.2rem; }
article.coffee p.empty + p.empty { display: none; }

/* 阅读进度条 */
.read-progress {
  position: fixed;
  top: 0; left: 0;
  height: 3px; width: 0;
  background: var(--ink);
  z-index: 40;
  transition: width 0.08s linear;
}

/* ---------------- 占位（建设中） ---------------- */
.placeholder {
  position: relative;
  text-align: center;
  padding: 4.5rem 1.5rem;
  border: var(--rule);
  background:
    repeating-linear-gradient(-45deg, var(--ink-hairline) 0 12px, transparent 12px 24px),
    var(--paper);
}

.placeholder .big {
  font-family: var(--serif);
  font-size: clamp(2rem, 6vw, 3.2rem);
  font-weight: 900;
  letter-spacing: 0.2em;
  color: var(--ink);
  margin: 0 0 0.7rem;
}

.placeholder .en {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.36em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin: 0 0 1.1rem;
}

.placeholder p { color: var(--ink); margin: 0.3rem 0; }

/* ---------------- 页脚 ---------------- */
.site-footer {
  border-top: 2px solid var(--ink);
  background: var(--paper-2);
  padding: 2.2rem 0 2.6rem;
  color: var(--ink-soft);
  font-size: 0.85rem;
}

.site-footer .foot-mark {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--ink);
  margin-bottom: 0.8rem;
}

.site-footer p { margin: 0.3rem 0; }
.site-footer a { color: var(--ink-soft); }
.site-footer a:hover { color: var(--ink); }

.text-muted { color: var(--ink-soft); }

/* ---------------- 装饰元素 ---------------- */
.barcode {
  height: 26px; width: 130px;
  background: repeating-linear-gradient(90deg,
    var(--ink) 0 2px, transparent 2px 5px,
    var(--ink) 5px 9px, transparent 9px 11px,
    var(--ink) 11px 12px, transparent 12px 16px);
  opacity: 0.65;
  margin-top: 1.5rem;
}

.corner-ornament {
  position: absolute;
  width: 14px; height: 14px;
  border: 1px solid var(--ink-line);
}

/* ---------------- 进场动效 ---------------- */
/* 默认可见；仅当 JS+IntersectionObserver 可用时（main.js 加 .pre）才隐藏，
   并总有超时兜底把内容显示出来，保证无 JS/观察器失效时内容完整可见。 */
.reveal { opacity: 1; transform: none; }
.reveal.pre { opacity: 0; transform: translateY(16px); transition: opacity 0.55s ease, transform 0.55s ease; }
.reveal.pre.in { opacity: 1; transform: none; }

/* ---------------- 响应式 ---------------- */
@media (min-width: 640px) {
  .card-grid { grid-template-columns: repeat(2, 1fr); }
  .card-grid.single { grid-template-columns: 1fr; }
  .card-grid .card { border-bottom: none; border-right: var(--rule); }
  .card-grid .card:nth-child(2n) { border-right: none; }
  .card-grid .card:nth-child(-n+2) { border-bottom: var(--rule); }
  .card-grid.single .card { border-right: none; border-bottom: none; }
  .product-shots { grid-template-columns: repeat(3, 1fr); }
  details.toc ol { columns: 4; }
}

@media (max-width: 720px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-text { border-right: none; border-bottom: var(--hairline); padding: 2.4rem 0 2rem; }
  .hero-fig { min-height: 16rem; }
  .sec-en { display: none; }
  .masthead .issue { display: none; }
  .log-head { grid-template-columns: auto auto 1fr; }
  .log-badge { grid-column: 3; justify-self: start; }
  .log-summary { grid-column: 1 / -1; grid-row: 2; }
  .log-head::after { grid-column: 4; }
  .reader-toolbar { top: 3rem; }
  .reader-toolbar label { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
  .reader-current { display: none; }
  .chapter-links { grid-template-columns: 1fr auto 1fr; gap: 0.4rem; font-size: 0.72rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
  .reveal { opacity: 1; transform: none; }
  .eye-cursor { display: none !important; }
}

/* ============================================================
   机械感 · 视觉模型识别标注层（detection overlay）
   检测框 + 关键点 + 置信度标签 + 准星 + 扫描线 + 连接线
   ============================================================ */

/* 承载图与标注的容器：固定宽高比，图铺满，标注绝对定位在 % 坐标 */
.fig-frame {
  position: relative;
  overflow: hidden;
  background: var(--paper);
  border: var(--hairline);
  aspect-ratio: var(--ar, 4 / 3);
  min-height: 0;
}

.fig-frame > img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* 标注层 */
.vision { position: absolute; inset: 0; pointer-events: none; }

/* 检测框：细虚线框 + 四角角标 + 右上角置信度 */
.bbox {
  position: absolute;
  border: 1px dashed var(--ink-line);
  background: rgba(11, 31, 168, 0.04);
  animation: framePulse 3.2s ease-in-out infinite;
}

.bbox .cc {
  position: absolute;
  width: 9px; height: 9px;
  border: 1.5px solid var(--ink);
}

.bbox .cc.tl { top: -1px; left: -1px; border-right: 0; border-bottom: 0; }
.bbox .cc.tr { top: -1px; right: -1px; border-left: 0; border-bottom: 0; }
.bbox .cc.bl { bottom: -1px; left: -1px; border-right: 0; border-top: 0; }
.bbox .cc.br { bottom: -1px; right: -1px; border-left: 0; border-top: 0; }

.bbox .lbl {
  position: absolute;
  top: -1.5em;
  left: -1px;
  font-family: var(--mono);
  font-size: 0.6rem;
  letter-spacing: 0.14em;
  line-height: 1;
  white-space: nowrap;
  background: var(--ink);
  color: var(--paper);
  padding: 0.22em 0.5em;
  animation: labelBlink 4s step-end infinite;
}

.bbox .lbl.dim { background: transparent; color: var(--ink); border: 1px solid var(--ink-line); }

/* 关键点 */
.kp {
  position: absolute;
  width: 8px; height: 8px;
  margin: -4px 0 0 -4px;
  border-radius: 50%;
  border: 2px solid var(--paper);
  background: var(--ink);
  animation: pulse 2.4s ease-in-out infinite;
}

.kp::after {
  content: "";
  position: absolute;
  inset: -7px;
  border: 1px solid var(--ink-line);
  border-radius: 50%;
  animation: ring 2.4s ease-out infinite;
}

/* 关键点十字 */
.kp-x {
  position: absolute;
  width: 15px; height: 15px;
  margin: -7px 0 0 -7px;
  opacity: 0.75;
}
.kp-x::before, .kp-x::after {
  content: "";
  position: absolute;
  background: var(--ink);
  opacity: 0.55;
}
.kp-x::before { left: 50%; top: 0; bottom: 0; width: 1px; transform: translateX(-50%); }
.kp-x::after { top: 50%; left: 0; right: 0; height: 1px; transform: translateY(-50%); }

/* 关键点连接线（骨骼式） */
.bone {
  position: absolute;
  height: 1px;
  background: linear-gradient(90deg, var(--ink), var(--ink-line));
  transform-origin: left center;
  opacity: 0.5;
}

/* 主准星（四角） */
.cross {
  position: absolute;
  width: 22px; height: 22px;
  opacity: 0.5;
}
.cross::before, .cross::after { content: ""; position: absolute; }
.cross::before { left: 50%; top: 0; bottom: 0; width: 1px; background: var(--ink); }
.cross::after { top: 50%; left: 0; right: 0; height: 1px; background: var(--ink); }
.cross .ring {
  position: absolute;
  inset: 5px;
  border: 1px solid var(--ink-line);
  border-radius: 50%;
  animation: spin 12s linear infinite;
}

/* 扫描线 */
.scanline {
  position: absolute;
  left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--ink), transparent);
  animation: scan 7s linear infinite;
}
.scanline::before {
  content: "";
  position: absolute;
  left: 50%; top: 0;
  transform: translateX(-50%);
  width: 46px; height: 2px;
  background: var(--ink);
  filter: blur(1px);
}

/* 数据读出 */
.readout {
  position: absolute;
  font-family: var(--mono);
  font-size: 0.6rem;
  letter-spacing: 0.2em;
  color: var(--ink-soft);
  white-space: nowrap;
  text-transform: uppercase;
}

.readout .v { color: var(--ink); font-weight: 700; }

/* 尺寸标注线 */
.dimline {
  position: absolute;
  height: 1px;
  background: var(--ink-line);
}
.dimline::before, .dimline::after {
  content: "";
  position: absolute;
  top: -4px;
  width: 1px; height: 9px;
  background: var(--ink-line);
}
.dimline::before { left: 0; }
.dimline::after { right: 0; }
.dimline .dim-label {
  position: absolute;
  top: -0.6em;
  left: 50%;
  transform: translateX(-50%);
  font-family: var(--mono);
  font-size: 0.58rem;
  letter-spacing: 0.14em;
  color: var(--ink-soft);
  text-transform: uppercase;
}

/* ---------- 关键帧 ---------- */
@keyframes scan { 0% { top: -4%; } 100% { top: 104%; } }
@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 0.75; }
  50% { transform: scale(1.25); opacity: 1; }
}
@keyframes ring {
  0% { transform: scale(0.6); opacity: 0.8; }
  100% { transform: scale(1.6); opacity: 0; }
}
@keyframes spin { to { transform: rotate(360deg); } }
@keyframes labelBlink { 0%, 92% { opacity: 1; } 94%, 100% { opacity: 0.35; } }
@keyframes framePulse {
  0%, 100% { border-color: var(--ink-line); background: rgba(11,31,168,0.03); }
  50% { border-color: var(--ink); background: rgba(11,31,168,0.08); }
}

/* ============================================================
   动态背景层（增强机械感，弱化「素材单一」）
   固定于页面底层：缓移网格 + 扫描光束 + 漂移准星 + 旋转环
   ============================================================ */
.bg-tech {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}

/* 缓移网格 */
.bg-tech::before {
  content: "";
  position: absolute;
  inset: -20%;
  background-image:
    linear-gradient(var(--ink-hairline) 1px, transparent 1px),
    linear-gradient(90deg, var(--ink-hairline) 1px, transparent 1px);
  background-size: 84px 84px;
  animation: gridPan 60s linear infinite;
  opacity: 0.5;
}

/* 顶部缓慢下移的扫描光束 */
.bg-tech::after {
  content: "";
  position: absolute;
  left: 0; right: 0; top: -12%;
  height: 26vh;
  background: linear-gradient(180deg, transparent, rgba(11,31,168,0.045), transparent);
  animation: beam 14s linear infinite;
}

.bg-tech .ring {
  position: absolute;
  border: 1px dashed var(--ink-line);
  border-radius: 50%;
  animation: spin 36s linear infinite;
}
.bg-tech .cross {
  position: absolute;
  opacity: 0.14;
  animation: drift 22s ease-in-out infinite;
}

@keyframes gridPan { to { transform: translate(42px, 42px); } }
@keyframes beam { 0% { top: -16%; } 100% { top: 118%; } }
@keyframes drift {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(26px, -18px); }
}

/* 让主体内容浮在背景层之上 */
.masthead, .site-nav, .hero, main, .site-footer { position: relative; z-index: 1; }
body > .bg-tech { z-index: 0; }

/* 背景水印雕塑（淡 + 视差 + 轻微旋转） */
.wmark {
  position: absolute;
  opacity: 0.05;
  filter: saturate(1.1);
  mix-blend-mode: multiply;
  pointer-events: none;
  will-change: transform;
}

/* 背景漂移"待检测"空框 */
.scanbox {
  position: absolute;
  border: 1px dashed var(--ink-line);
  background: rgba(11, 31, 168, 0.02);
  animation: scanboxDrift 26s ease-in-out infinite;
  will-change: transform;
}
.scanbox::before, .scanbox::after {
  content: "";
  position: absolute;
  width: 9px; height: 9px;
  border: 1.5px solid var(--ink);
  opacity: 0.6;
}
.scanbox::before { top: -1px; left: -1px; border-right: 0; border-bottom: 0; }
.scanbox::after { bottom: -1px; right: -1px; border-left: 0; border-top: 0; }

@keyframes scanboxDrift {
  0%, 100% { transform: translate(0, 0); opacity: 0.35; }
  50% { transform: translate(30px, -22px); opacity: 0.7; }
}

/* 全站滚动进度条 */
#scroll-progress {
  position: fixed;
  top: 0; left: 0;
  height: 3px;
  width: 0;
  background: linear-gradient(90deg, var(--ink), var(--ink-deep));
  z-index: 50;
  box-shadow: 0 0 8px rgba(11, 31, 168, 0.4);
}

/* ---------- 标注滚动浮现（滚动到该图时"重新检测"，交错出现） ---------- */
.vision .bbox, .vision .kp, .vision .bone, .vision .cross,
.vision .readout, .vision .dimline, .vision .scanline {
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.45s ease, transform 0.45s ease;
  transition-delay: calc(var(--i, 0) * 0.07s);
}
.fig-frame.on .vision .bbox,
.fig-frame.on .vision .kp,
.fig-frame.on .vision .bone,
.fig-frame.on .vision .cross,
.fig-frame.on .vision .readout,
.fig-frame.on .vision .dimline,
.fig-frame.on .vision .scanline {
  opacity: 1;
  transform: none;
}

/* 人物图轻微视差（由 JS 写 --py） */
.fig-frame { transform: translateY(var(--py, 0px)); transition: transform 0.1s linear; }

/* ============================================================
   解构主义荒诞感：雕塑残片 / 巨型错位字母 / 错版重影
   只作点缀，密度很低，呼应「把古典拆散、让机器认错」的荒谬。
   ============================================================ */

/* 雕塑残片：从半调雕像裁切旋转，漂浮 */
.shard {
  position: absolute;
  opacity: 0.42;
  mix-blend-mode: multiply;
  animation: shardFloat 18s ease-in-out infinite;
  will-change: transform;
  pointer-events: none;
}
@keyframes shardFloat {
  0%, 100% { transform: translate(0, 0) rotate(var(--r, 0deg)); }
  50% { transform: translate(20px, -26px) rotate(calc(var(--r, 0deg) + 5deg)); }
}

/* 巨型解构字母：巨大、旋转、被裁切、极淡 */
.decon-letter {
  position: absolute;
  font-family: var(--serif);
  font-weight: 900;
  color: var(--ink);
  opacity: 0.07;
  line-height: 1;
  pointer-events: none;
  user-select: none;
  z-index: 0;
}

/* 错版重影：文字带偏移的错位复影 + 轻微倾斜 */
.misreg { position: relative; }
.misreg::before {
  content: attr(data-text);
  position: absolute;
  left: 0.07em;
  top: 0.05em;
  color: var(--ink);
  opacity: 0.4;
  transform: skewX(-8deg) translateX(2px);
  z-index: -1;
}

/* 荒诞检测框（机器"睁眼说瞎话"）：单个框允许旋转 */
.bbox[data-rot] { transform: rotate(var(--rot, 0deg)); }

/* 荒诞框：模糊的"幻觉识别"，时隐时现、节奏错乱 */
.bbox.absurd { opacity: 0; }
.bbox.absurd .lbl {
  background: transparent;
  color: var(--ink);
  border: 1px dashed var(--ink-line);
  animation: none;
}
.bbox.absurd .cc { border-color: var(--ink-faint); }
.fig-frame.on .bbox.absurd {
  animation: absurdFlick var(--dur, 9s) var(--dly, 0s) infinite;
}

/* 全屏页面级荒诞框：随文档滚动、偏向两侧、不倾斜、不压透明度 */
.page-boxes { position: absolute; inset: 0; z-index: 1; pointer-events: none; }
.absurd-box {
  position: absolute;
  border: 1px dashed var(--ink-line);
  background: rgba(11, 31, 168, 0.03);
  animation: absurdFlick var(--dur, 9s) var(--dly, 0s) infinite;
  pointer-events: none;
}
.absurd-box::before, .absurd-box::after {
  content: "";
  position: absolute;
  width: 10px; height: 10px;
  border: 1.5px solid var(--ink-faint);
}
.absurd-box::before { top: -1px; right: -1px; border-left: 0; border-bottom: 0; }
.absurd-box::after { bottom: -1px; left: -1px; border-right: 0; border-top: 0; }
.absurd-box .absurd-lbl {
  position: absolute;
  top: -1.5em;
  left: -1px;
  font-family: var(--mono);
  font-size: 0.58rem;
  letter-spacing: 0.14em;
  white-space: nowrap;
  color: var(--ink);
  border: 1px dashed var(--ink-line);
  padding: 0.2em 0.45em;
}
/* 每次可见期短暂、带轻微位移抖动，像不断认错又反悔（不旋转） */
@keyframes absurdFlick {
  0%, 9%   { opacity: 0; transform: translate(0, 0); }
  10%, 26% { opacity: 1; transform: translate(var(--jx, 0px), var(--jy, 0px)); }
  27%, 42% { opacity: 0; transform: translate(0, 0); }
  43%, 59% { opacity: 1; transform: translate(calc(var(--jx, 0px) * -1), calc(var(--jy, 0px) - 5px)); }
  60%, 100%{ opacity: 0; transform: translate(0, 0); }
}

@media (prefers-reduced-motion: reduce) {
  .bbox, .bbox .lbl, .kp, .kp::after, .cross .ring, .scanline,
  .bg-tech::before, .bg-tech::after, .bg-tech .ring, .bg-tech .cross,
  .scanbox, .shard, .absurd-box,
  .eye-cursor, .eye-img, .eye-fx { animation: none !important; }
  .fig-frame { transform: none !important; transition: none !important; }
}