/* ==========================================================================
   柜中光 · 泡泡玛特潮玩收藏与摄影 · 全局样式
   设计方向：潮玩陈列柜 / 编辑式图录
   - 暖白纸感底 + 一个高饱和强调色（朱砂），强调色只用于标记与行动
   - 大字号编辑感标题；编号用衬线体，参数用等宽体，正文用系统黑体
   - 玩具盒式卡片：白面 + 细边 + 硬偏移阴影 + 角标条，不做电商按钮与价格
   - 布光图占据视觉主体：图版式边框 + 图注 + 许可行
   ========================================================================== */

/* ---------- 1. 令牌 ---------- */
:root {
  --paper: #f5efe4;
  --paper-deep: #ece3d3;
  --paper-deeper: #e3d8c4;
  --card: #fffdf8;
  --ink: #1f1a14;
  --ink-2: #3a3229;
  --muted: #5f5546;
  --faint: #675d4d;
  --line: #d7cab5;
  --line-soft: #e7ddcc;
  --accent: #d9482b;
  --accent-deep: #a8331a;
  --accent-soft: #f7e0d6;
  --accent-line: rgba(168, 51, 26, 0.32);

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei UI",
    "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", "Noto Sans CJK SC",
    "Source Han Sans SC", sans-serif;
  --font-serif: Georgia, "Times New Roman", "Songti SC", "SimSun", "Noto Serif CJK SC", serif;
  --font-mono: ui-monospace, "Cascadia Mono", "Cascadia Code", "Consolas",
    "SF Mono", "Menlo", "Liberation Mono", monospace;

  --fs-body: 17px;
  --fs-sm: 14.5px;
  --fs-xs: 13px;
  --measure: 40em;
  --wrap: 1140px;
  --gap: clamp(16px, 3vw, 32px);
  --section-y: clamp(46px, 6.5vw, 84px);
  --ease: cubic-bezier(0.2, 0.6, 0.25, 1);
}

@media (max-width: 640px) {
  :root {
    --fs-body: 16.5px;
    --fs-sm: 14px;
    --fs-xs: 12.5px;
  }
}

/* ---------- 2. 基础 ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 92px;
  background: var(--paper);
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: 1.9;
  -webkit-font-smoothing: antialiased;
  font-feature-settings: "kern" 1;
}

::selection {
  background: rgba(217, 72, 43, 0.2);
}

h1,
h2,
h3,
h4 {
  margin: 0;
  font-weight: 800;
  line-height: 1.28;
  letter-spacing: 0;
  text-wrap: balance;
}

p {
  margin: 0;
}

ul,
ol,
dl,
dd {
  margin: 0;
  padding: 0;
}

ul,
ol {
  list-style: none;
}

a {
  color: var(--accent-deep);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  text-decoration-color: var(--accent-line);
  transition: color 140ms var(--ease), text-decoration-color 140ms var(--ease);
}

a:hover {
  text-decoration-color: currentColor;
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
summary:focus-visible,
[tabindex]:focus-visible {
  outline: 2px solid var(--accent-deep);
  outline-offset: 2px;
  border-radius: 1px;
}

:focus:not(:focus-visible) {
  outline: none;
}

button,
input,
select {
  font: inherit;
  color: inherit;
}

code,
kbd,
samp,
pre {
  font-family: var(--font-mono);
  font-variant-ligatures: none;
}

img,
svg {
  max-width: 100%;
}

.serif {
  font-family: var(--font-serif);
  font-weight: 400;
  font-variant-numeric: tabular-nums;
}

.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.01em;
}

.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.muted {
  color: var(--faint);
}

.nowrap {
  white-space: nowrap;
}

.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: clamp(18px, 4vw, 40px);
}

main {
  display: block;
  outline: none;
}

/* ---------- 3. 页头与导航 ---------- */
.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 100;
  padding: 10px 16px;
  background: var(--ink);
  color: var(--paper);
  text-decoration: none;
  font-size: var(--fs-sm);
  transform: translateY(-220%);
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: var(--paper);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  min-height: 70px;
}

.brand {
  display: flex;
  flex-direction: column;
  gap: 1px;
  flex: none;
  text-decoration: none;
  color: var(--ink);
}

.brand-cn {
  font-size: 1.22rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  line-height: 1.1;
}

.brand-en {
  color: var(--faint);
  font-size: 9px;
  letter-spacing: 0.22em;
}

.site-nav {
  min-width: 0;
  overflow-x: auto;
  margin-inline: -8px;
  padding-inline: 8px;
  scrollbar-width: none;
}

.site-nav::-webkit-scrollbar {
  display: none;
}

.site-nav ul {
  display: flex;
  align-items: stretch;
  gap: 0;
}

.site-nav a {
  display: flex;
  align-items: center;
  height: 44px;
  padding: 0 11px;
  color: var(--ink-2);
  font-size: var(--fs-sm);
  text-decoration: none;
  white-space: nowrap;
  border-bottom: 2px solid transparent;
  transition: color 140ms var(--ease), border-color 140ms var(--ease);
}

.site-nav a:hover {
  color: var(--accent-deep);
}

.site-nav a[aria-current="page"] {
  color: var(--ink);
  font-weight: 700;
  border-bottom-color: var(--accent-deep);
}

/* ---------- 4. 提示条 ---------- */
.notice {
  margin-top: 20px;
  border: 1px solid var(--line);
  border-left: 4px solid var(--accent);
  background: var(--card);
  padding: 14px 20px;
}

.notice-label {
  color: var(--accent-deep);
  font-size: 10.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 6px;
}

.notice-list {
  display: grid;
  gap: 4px;
  color: var(--muted);
  font-size: var(--fs-sm);
  line-height: 1.75;
}

.notice-list li::before {
  content: "·";
  color: var(--accent-deep);
  margin-right: 8px;
}

.notice-inline {
  border-left: 2px solid var(--accent-line);
  padding: 6px 0 6px 14px;
  margin: 16px 0;
  color: var(--muted);
  font-size: var(--fs-sm);
  line-height: 1.85;
}

/* ---------- 5. 通用排版 ---------- */
.block {
  padding-block: var(--section-y);
  border-top: 1px solid var(--line);
}

.block:first-of-type {
  border-top: 0;
}

.block-end {
  padding-bottom: calc(var(--section-y) + 10px);
}

.section-head {
  max-width: 48em;
  margin-bottom: clamp(24px, 4vw, 38px);
}

.section-eyebrow {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 12px;
}

.section-no {
  color: var(--accent-deep);
  font-size: clamp(1.8rem, 3.4vw, 2.4rem);
  line-height: 1;
  letter-spacing: -0.02em;
}

.section-eyebrow .mono {
  color: var(--faint);
  font-size: 10.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.section-title {
  font-size: clamp(1.55rem, 3.4vw, 2.15rem);
  max-width: 30em;
}

.sec-lead {
  margin-top: 14px;
  max-width: var(--measure);
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.9;
}

.head-link,
.head-note {
  display: inline-block;
  margin-top: 14px;
  font-size: var(--fs-xs);
}

.head-link {
  color: var(--accent-deep);
}

.head-note {
  color: var(--faint);
  font-family: var(--font-mono);
}

.block-more {
  margin-top: 22px;
  font-size: var(--fs-sm);
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
}

.block-lead {
  max-width: var(--measure);
  color: var(--muted);
  margin-bottom: 22px;
}

/* 按钮：实心用深朱砂（保证白字对比度），描边用墨色 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 22px;
  border: 1px solid var(--accent-deep);
  background: var(--accent-deep);
  color: #fff;
  border-radius: 1px;
  font-size: var(--fs-sm);
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
  transition: background 140ms var(--ease), border-color 140ms var(--ease), color 140ms var(--ease);
}

.btn:hover {
  background: #8f2a13;
  border-color: #8f2a13;
  color: #fff;
}

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

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

.btn-small {
  min-height: 38px;
  padding: 0 14px;
  font-size: var(--fs-xs);
}

.text-link {
  font-size: var(--fs-xs);
  color: var(--muted);
}

/* 标签、状态、刻度 */
.tag {
  display: inline-block;
  padding: 2px 8px;
  border: 1px solid var(--line);
  background: var(--card);
  color: var(--muted);
  font-size: 10.5px;
  line-height: 1.7;
  white-space: nowrap;
}

.status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 2px 9px;
  border: 1px solid var(--line);
  background: var(--card);
  color: var(--muted);
  font-size: 11px;
  line-height: 1.7;
  white-space: nowrap;
}

.status::before {
  content: "";
  width: 5px;
  height: 5px;
  border-radius: 50%;
  border: 1px solid currentColor;
}

.status-done {
  color: var(--accent-deep);
  border-color: var(--accent-line);
}

.status-done::before {
  background: currentColor;
}

.status-wip {
  color: var(--ink-2);
}

.status-wip::before {
  background: currentColor;
}

.status-empty {
  color: var(--faint);
  border-style: dashed;
}

.pill {
  display: inline-block;
  margin-left: 10px;
  padding: 1px 7px;
  border: 1px dashed var(--line);
  color: var(--faint);
  font-size: 10.5px;
  font-weight: 400;
  vertical-align: middle;
}

.ticks {
  display: inline-flex;
  gap: 3px;
  vertical-align: middle;
}

.ticks i {
  display: block;
  width: 8px;
  height: 8px;
  border: 1px solid var(--ink-2);
  background: transparent;
  opacity: 0.45;
}

.ticks i.on {
  background: var(--ink);
  border-color: var(--ink);
  opacity: 1;
}

.stars {
  display: inline-flex;
  gap: 3px;
}

.stars i {
  display: block;
  width: 8px;
  height: 8px;
  border: 1px solid var(--line);
  transform: rotate(45deg);
}

.stars i.on {
  background: var(--accent);
  border-color: var(--accent-deep);
}

.mod-chip {
  display: inline-block;
  padding: 3px 9px;
  border: 1px solid var(--line);
  background: var(--card);
  color: var(--ink-2);
  font-size: 11px;
  line-height: 1.6;
  text-decoration: none;
  transition: border-color 140ms var(--ease), color 140ms var(--ease);
}

.mod-chip:hover {
  border-color: var(--accent-deep);
  color: var(--accent-deep);
  text-decoration: none;
}

.label-strip {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 4px 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line-soft);
  color: var(--faint);
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

/* ---------- 6. 表单控件 ---------- */
.toolbar {
  border: 1px solid var(--line);
  background: var(--card);
  padding: clamp(16px, 2.5vw, 24px);
  display: grid;
  gap: 18px;
}

.toolbar-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 20px;
  padding-top: 14px;
  border-top: 1px solid var(--line-soft);
}

.search-field {
  max-width: 460px;
}

.input {
  width: 100%;
  min-height: 46px;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: 1px;
  background: var(--paper);
  color: var(--ink);
  font-size: max(16px, var(--fs-sm));
}

.input::placeholder {
  color: var(--faint);
}

.input:hover {
  border-color: var(--ink-2);
}

.input:focus {
  border-color: var(--accent-deep);
  outline: 2px solid var(--accent-line);
  outline-offset: 0;
}

.filter-group {
  border: 0;
  margin: 0;
  padding: 0;
  min-width: 0;
}

.filter-legend {
  display: block;
  color: var(--faint);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-bottom: 9px;
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  min-height: 38px;
  padding: 0 13px;
  border: 1px solid var(--line);
  background: var(--paper);
  color: var(--ink-2);
  font-size: var(--fs-xs);
  cursor: pointer;
  transition: background 140ms var(--ease), color 140ms var(--ease), border-color 140ms var(--ease);
}

.chip:hover {
  border-color: var(--ink-2);
}

.chip.is-active {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}

.chip-count {
  color: var(--faint);
  font-size: 10.5px;
}

.chip.is-active .chip-count {
  color: rgba(245, 239, 228, 0.72);
}

.toolbar-status {
  color: var(--faint);
  font-size: 11px;
}

/* ---------- 7. 代码 / 表格 ---------- */
.code-block {
  position: relative;
  margin: 18px 0;
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent);
  background: var(--card);
  overflow: hidden;
}

.code-block pre {
  margin: 0;
  padding: 16px 18px;
  overflow-x: auto;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--ink-2);
}

.copyable {
  padding-bottom: 48px;
}

.copy-btn {
  position: absolute;
  right: 8px;
  bottom: 8px;
  min-height: 32px;
  padding: 0 12px;
  border: 1px solid var(--line);
  background: var(--paper);
  color: var(--muted);
  font-size: 11px;
  cursor: pointer;
}

.copy-btn:hover {
  color: var(--accent-deep);
  border-color: var(--accent-deep);
}

.table-wrap {
  width: 100%;
  overflow-x: auto;
  border: 1px solid var(--line);
  background: var(--card);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--fs-sm);
  min-width: 540px;
}

caption {
  text-align: left;
}

thead th {
  padding: 12px 14px;
  border-bottom: 1px solid var(--line);
  color: var(--faint);
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 400;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  text-align: left;
  white-space: nowrap;
}

tbody td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--line-soft);
  color: var(--ink-2);
  vertical-align: top;
}

tbody tr:last-child td {
  border-bottom: 0;
}

tbody tr:hover td {
  background: rgba(217, 72, 43, 0.035);
}

/* ---------- 8. 页脚 ---------- */
.site-footer {
  margin-top: var(--section-y);
  border-top: 1px solid var(--line);
  background: var(--paper-deep);
}

.footer-inner {
  display: grid;
  grid-template-columns: 1.5fr 0.8fr 0.8fr 1.4fr;
  gap: clamp(24px, 4vw, 48px);
  padding-block: clamp(36px, 5vw, 56px);
}

.footer-brand {
  max-width: 28em;
}

.footer-mark {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--ink);
}

.footer-mark .mono {
  font-size: 10px;
  font-weight: 400;
  color: var(--accent-deep);
  letter-spacing: 0.06em;
}

.footer-disclaimer {
  margin-top: 12px;
  color: var(--muted);
  font-size: var(--fs-xs);
  line-height: 1.8;
}

.footer-sub {
  margin-top: 10px;
  color: var(--faint);
  font-size: 11px;
  line-height: 1.75;
}

.footer-title {
  color: var(--faint);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.footer-col ul {
  display: grid;
  gap: 8px;
}

.footer-col a {
  color: var(--ink-2);
  font-size: var(--fs-xs);
  text-decoration: none;
}

.footer-col a:hover {
  color: var(--accent-deep);
  text-decoration: underline;
}

.meta-list {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 6px 14px;
  font-size: var(--fs-xs);
}

.meta-list dt {
  color: var(--faint);
}

.meta-list dd {
  color: var(--ink-2);
  word-break: break-word;
}

.footer-boundary {
  margin-top: 16px;
  color: var(--faint);
  font-size: 11px;
  line-height: 1.8;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px 24px;
  padding-block: 16px 24px;
  border-top: 1px solid var(--line);
  color: var(--faint);
  font-size: 11px;
}

.to-top {
  position: fixed;
  right: clamp(12px, 2.5vw, 24px);
  bottom: clamp(12px, 2.5vw, 24px);
  z-index: 50;
  min-height: 42px;
  padding: 0 14px;
  border: 1px solid var(--ink-2);
  background: var(--card);
  color: var(--ink);
  font-size: 11px;
  cursor: pointer;
  box-shadow: 3px 3px 0 rgba(31, 26, 20, 0.08);
}

.to-top:hover {
  color: var(--accent-deep);
  border-color: var(--accent-deep);
}

.to-top[hidden] {
  display: none;
}

/* ---------- 9. 首页 ---------- */
.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.85fr);
  gap: clamp(30px, 5vw, 64px);
  align-items: start;
  padding-block: clamp(40px, 6vw, 84px) clamp(28px, 4vw, 48px);
}

.hero-copy {
  max-width: 38em;
}

.hero-eyebrow {
  color: var(--faint);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-bottom: 20px;
}

.hero-claim {
  font-size: clamp(2.4rem, 5.8vw, 4.1rem);
  line-height: 1.14;
  letter-spacing: -0.01em;
  margin-bottom: 22px;
}

.hero-thesis {
  max-width: var(--measure);
  color: var(--ink-2);
  font-size: 1.05rem;
  line-height: 1.95;
}

.hero-spec {
  margin-top: 28px;
  border-top: 1px solid var(--line);
}

.spec-row {
  display: grid;
  grid-template-columns: 82px minmax(0, 1fr);
  gap: 16px;
  padding: 11px 0;
  border-bottom: 1px solid var(--line-soft);
  font-size: var(--fs-xs);
}

.spec-row dt {
  color: var(--faint);
  letter-spacing: 0.08em;
}

.spec-row dd {
  color: var(--ink-2);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.hero-figure {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--card);
  padding: 14px;
  box-shadow: 5px 5px 0 rgba(31, 26, 20, 0.055);
}

.hero-figure-frame {
  border: 1px solid var(--line-soft);
  background: var(--paper-deep);
  padding: 8px;
}

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

.hero-figure figcaption {
  margin-top: 10px;
  color: var(--faint);
  font-size: 10px;
  letter-spacing: 0.04em;
  text-align: right;
}

.chain-strip {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 24px;
  padding: 16px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.chain-label {
  color: var(--faint);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  white-space: nowrap;
}

.chain {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 0;
  counter-reset: chain;
}

.chain li {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--ink-2);
  font-size: var(--fs-sm);
}

.chain li:not(:last-child)::after {
  content: "→";
  color: var(--accent-deep);
  margin: 0 14px 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
}

.chain-dot {
  width: 6px;
  height: 6px;
  background: var(--accent);
  flex: none;
}

/* 三条问题 */
.questions {
  border-top: 1px solid var(--line);
}

.question {
  display: grid;
  grid-template-columns: 84px minmax(0, 1fr);
  gap: clamp(16px, 3vw, 36px);
  padding: clamp(22px, 3.2vw, 34px) 0;
  border-bottom: 1px solid var(--line-soft);
}

.question-no {
  color: var(--accent-deep);
  font-size: clamp(1.9rem, 4vw, 2.6rem);
  line-height: 1;
  padding-top: 2px;
}

.question-tag {
  color: var(--faint);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-bottom: 8px;
}

.question-title {
  font-size: clamp(1.2rem, 2.6vw, 1.6rem);
  line-height: 1.42;
  max-width: 26em;
}

.question-short {
  margin-top: 10px;
  max-width: var(--measure);
  color: var(--muted);
  font-size: var(--fs-sm);
  line-height: 1.9;
}

.question-mods {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}

/* 数字概览 */
.metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border: 1px solid var(--line);
  background: var(--card);
}

.metric {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: clamp(18px, 3vw, 26px);
  border-right: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
}

.metric:nth-child(3n) {
  border-right: 0;
}

.metric:nth-last-child(-n + 3) {
  border-bottom: 0;
}

.metric-value {
  color: var(--accent-deep);
  font-size: clamp(2rem, 4.2vw, 2.8rem);
  line-height: 1.05;
}

.metric-label {
  color: var(--ink);
  font-size: var(--fs-sm);
  font-weight: 700;
}

.metric-sub {
  color: var(--faint);
  font-size: 10.5px;
}

.stats-note {
  margin-top: 14px;
  color: var(--faint);
  font-size: 11px;
  line-height: 1.8;
}

/* 模块表 */
.module-table {
  min-width: 560px;
}

.cell-code a {
  color: var(--accent-deep);
  font-size: var(--fs-sm);
  text-decoration: none;
}

.cell-title a {
  color: var(--ink);
  font-weight: 700;
  text-decoration: none;
}

.cell-title a:hover,
.cell-code a:hover {
  text-decoration: underline;
}

.cell-question {
  display: block;
  margin-top: 2px;
  color: var(--faint);
  font-size: var(--fs-xs);
  font-weight: 400;
}

.cell-count {
  color: var(--muted);
  font-size: var(--fs-xs);
  white-space: nowrap;
}

/* 最近更新 */
.recent-list {
  border-top: 1px solid var(--line);
}

.recent-list a {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr) auto;
  gap: 16px;
  align-items: baseline;
  padding: 15px 0;
  border-bottom: 1px solid var(--line-soft);
  color: var(--ink);
  text-decoration: none;
}

.recent-list a:hover .recent-title {
  color: var(--accent-deep);
}

.recent-mod {
  color: var(--accent-deep);
  font-size: 11px;
}

.recent-title {
  font-size: 0.98rem;
  transition: color 140ms var(--ease);
}

.recent-date {
  color: var(--faint);
  font-size: 11px;
}

/* 阅读路径 */
.paths {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.path {
  background: var(--card);
  padding: clamp(20px, 3vw, 28px);
}

.path-time {
  color: var(--accent-deep);
  font-size: 11px;
  letter-spacing: 0.1em;
  margin-bottom: 10px;
}

.path-title {
  font-size: 1.05rem;
  margin-bottom: 10px;
}

.path-text {
  color: var(--muted);
  font-size: var(--fs-xs);
  line-height: 1.9;
}

.path-links {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 16px;
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--line-soft);
  font-size: var(--fs-xs);
}

/* 链路 */
.pipeline {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  border-top: 1px solid var(--line);
}

.pipe-step a {
  display: block;
  height: 100%;
  padding: 20px 16px 22px 0;
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--line-soft);
  position: relative;
}

.pipe-step a::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 26px;
  height: 3px;
  background: var(--accent);
}

.pipe-step a:hover .pipe-label {
  color: var(--accent-deep);
}

.pipe-no {
  display: block;
  color: var(--faint);
  font-size: 10px;
  margin-bottom: 10px;
}

.pipe-label {
  display: block;
  font-weight: 800;
  font-size: 1rem;
  margin-bottom: 6px;
  transition: color 140ms var(--ease);
}

.pipe-text {
  display: block;
  color: var(--muted);
  font-size: var(--fs-xs);
  line-height: 1.85;
  padding-right: 16px;
}

/* ---------- 10. 内页页头 ---------- */
.page-head {
  padding-block: clamp(34px, 5vw, 60px) clamp(20px, 3vw, 32px);
  border-bottom: 1px solid var(--line);
}

.page-eyebrow {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 16px;
}

.page-no {
  color: var(--accent-deep);
  font-size: 2rem;
  line-height: 1;
}

.page-eyebrow .mono {
  color: var(--faint);
  font-size: 10.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.page-title {
  font-size: clamp(1.9rem, 4.4vw, 3rem);
  line-height: 1.22;
  max-width: 22em;
}

.page-lead {
  margin-top: 20px;
  max-width: var(--measure);
  color: var(--muted);
  font-size: 1.02rem;
  line-height: 1.95;
}

.page-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 22px;
  margin-top: 22px;
  color: var(--faint);
  font-size: 11px;
}

.page-facts li {
  position: relative;
  padding-left: 14px;
}

.page-facts li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.66em;
  width: 5px;
  height: 1px;
  background: var(--accent);
}

/* ---------- 11. 学习地图 ---------- */
.dep-figure {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--card);
  padding: clamp(12px, 2vw, 22px);
  box-shadow: 4px 4px 0 rgba(31, 26, 20, 0.05);
}

.dep-svg {
  display: block;
  width: 100%;
  height: auto;
  color: var(--ink-2);
}

.dep-edge path {
  fill: none;
  stroke: var(--ink-2);
  stroke-width: 1.1;
  opacity: 0.4;
}

.dep-edge-skip path {
  stroke-dasharray: 4 4;
  stroke: var(--accent);
  opacity: 0.55;
}

.dep-node rect {
  fill: var(--paper);
  stroke: var(--line);
  stroke-width: 1;
}

.dep-node:hover rect {
  stroke: var(--accent);
  fill: var(--card);
}

.dep-code {
  fill: var(--accent-deep);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
}

.dep-name {
  fill: var(--ink);
  font-family: var(--font-sans);
  font-size: 12.5px;
  font-weight: 700;
}

.dep-count,
.dep-option {
  fill: var(--faint);
  font-size: 9px;
  letter-spacing: 0.06em;
}

.dep-figure figcaption {
  margin-top: 14px;
  color: var(--faint);
  font-size: 11px;
  line-height: 1.75;
}

.legend {
  display: grid;
  gap: 8px;
  margin-top: 18px;
  max-width: 64em;
}

.legend li {
  display: grid;
  grid-template-columns: 62px minmax(0, 1fr);
  gap: 14px;
  font-size: var(--fs-xs);
  color: var(--muted);
  line-height: 1.8;
}

.legend-term {
  color: var(--ink);
  font-size: 11px;
  letter-spacing: 0.08em;
}

.station-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}

.station-nav-label {
  color: var(--faint);
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.station-nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.anchor-chip {
  display: inline-block;
  padding: 4px 10px;
  border: 1px solid var(--line);
  background: var(--card);
  color: var(--ink-2);
  font-size: 11px;
  text-decoration: none;
}

.anchor-chip:hover {
  border-color: var(--accent-deep);
  color: var(--accent-deep);
}

.stations {
  position: relative;
}

.station {
  position: relative;
  padding: clamp(28px, 4vw, 44px) 0 clamp(30px, 4vw, 46px) clamp(28px, 4vw, 42px);
  border-top: 1px solid var(--line-soft);
}

.station:first-child {
  border-top: 1px solid var(--line);
}

.station-rail {
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 1px;
  background: var(--line);
}

.station-dot {
  position: absolute;
  left: -4px;
  top: clamp(34px, 4.4vw, 48px);
  width: 9px;
  height: 9px;
  background: var(--paper);
  border: 1px solid var(--accent);
}

.station-head {
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr) auto;
  gap: clamp(12px, 2vw, 24px);
  align-items: start;
}

.station-code {
  color: var(--accent-deep);
  font-size: clamp(1.7rem, 3.6vw, 2.2rem);
  line-height: 1;
}

.station-title {
  font-size: clamp(1.2rem, 2.6vw, 1.55rem);
  line-height: 1.3;
}

.station-question {
  margin-top: 8px;
  color: var(--muted);
  font-size: var(--fs-sm);
}

.station-status {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 8px;
  white-space: nowrap;
}

.station-count {
  color: var(--faint);
  font-size: 11px;
}

.station-body {
  margin-top: 22px;
  padding-left: calc(92px + clamp(12px, 2vw, 24px));
  max-width: 64em;
}

.station-why {
  max-width: var(--measure);
  color: var(--ink-2);
  line-height: 1.95;
}

.station-meta {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 10px 16px;
  margin: 18px 0 8px;
  font-size: var(--fs-xs);
}

.station-meta dt {
  color: var(--faint);
  letter-spacing: 0.06em;
}

.station-meta dd {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  color: var(--muted);
}

.shelf-rows {
  margin-top: 16px;
  border-top: 1px solid var(--line-soft);
}

.shelf-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 42px 64px 92px;
  gap: 14px;
  align-items: center;
  padding: 12px 0;
  border-bottom: 1px solid var(--line-soft);
}

.shelf-main {
  display: flex;
  align-items: baseline;
  gap: 12px;
  min-width: 0;
  color: var(--ink);
  text-decoration: none;
}

.shelf-main:hover .shelf-title {
  color: var(--accent-deep);
}

.shelf-order {
  color: var(--faint);
  font-size: 10.5px;
  flex: none;
}

.shelf-title {
  font-size: 0.96rem;
  min-width: 0;
  overflow-wrap: break-word;
  transition: color 140ms var(--ease);
}

.shelf-id {
  color: var(--faint);
  font-size: 10px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  margin-left: auto;
}

.shelf-type,
.shelf-date {
  color: var(--faint);
  font-size: 10.5px;
  text-align: right;
}

.shelf-row.is-case .shelf-order {
  color: var(--accent-deep);
}

.shelf-diff {
  text-align: right;
}

.shelf-empty {
  margin-top: 16px;
  padding: 16px 18px;
  border: 1px dashed var(--line);
  background: rgba(255, 253, 248, 0.5);
  color: var(--faint);
  font-size: var(--fs-xs);
  line-height: 1.8;
}

/* ---------- 12. 图版 / 案例卡 / 知识库 ---------- */
.plate {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--card);
  padding: 10px;
}

.plate-frame {
  border: 1px solid var(--line-soft);
  background: var(--paper);
  padding: 10px;
}

.plate-frame img {
  display: block;
  width: 100%;
  height: auto;
}

.plate figcaption {
  padding: 10px 4px 2px;
}

.plate-caption {
  display: block;
  color: var(--ink-2);
  font-size: var(--fs-xs);
  margin-bottom: 4px;
}

.fig-license {
  color: var(--faint);
  font-size: 10px;
  line-height: 1.7;
}

.fig-license.is-warning {
  color: var(--accent-deep);
}

.fig-dot {
  margin: 0 8px;
  color: var(--line);
}

.plate-stack {
  display: grid;
  gap: 18px;
  margin: 24px 0 8px;
  max-width: 58em;
}

.plate-diagram .plate-frame {
  background: var(--paper);
}

.plate-photo .plate-frame {
  background: var(--paper-deep);
}

.missing-image {
  padding: 14px 16px;
  border: 1px dashed var(--line);
  color: var(--accent-deep);
  font-size: var(--fs-xs);
}

/* 案例网格 */
.case-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
}

.case-card {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--line);
  background: var(--card);
  box-shadow: 4px 4px 0 rgba(31, 26, 20, 0.06);
  transition: box-shadow 160ms var(--ease), transform 160ms var(--ease);
}

.case-card:hover {
  transform: translate(-1px, -1px);
  box-shadow: 6px 6px 0 rgba(31, 26, 20, 0.08);
}

.case-card[hidden] {
  display: none;
}

.case-thumb {
  position: relative;
  aspect-ratio: 660 / 400;
  background: var(--paper-deep);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}

.case-thumb img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: 8px;
}

.case-num {
  position: absolute;
  left: 10px;
  top: 10px;
  padding: 2px 8px;
  background: var(--card);
  border: 1px solid var(--line);
  color: var(--accent-deep);
  font-size: 9.5px;
  letter-spacing: 0.12em;
}

.thumb-missing {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
  color: var(--faint);
  font-size: 11px;
}

.case-body {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 18px 20px 20px;
  flex: 1;
}

.case-title {
  font-size: 1.16rem;
  line-height: 1.4;
}

.case-title a {
  color: var(--ink);
  text-decoration: none;
}

.case-title a:hover {
  color: var(--accent-deep);
  text-decoration: underline;
  text-decoration-color: var(--accent-line);
}

.case-goal {
  color: var(--muted);
  font-size: var(--fs-sm);
  line-height: 1.85;
}

.case-params {
  padding: 8px 10px;
  background: var(--paper);
  border-left: 2px solid var(--accent-line);
  color: var(--ink-2);
  font-size: 10.5px;
  line-height: 1.7;
}

.case-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.case-license {
  color: var(--faint);
  font-size: 10px;
}

.case-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-top: auto;
  padding-top: 4px;
}

/* 阅读布局 */
.reader-layout {
  margin-top: 26px;
}

.reader {
  border: 1px solid var(--line);
  border-top: 3px solid var(--accent);
  background: var(--card);
  padding: clamp(18px, 3vw, 34px);
  margin-bottom: 30px;
  box-shadow: 4px 4px 0 rgba(31, 26, 20, 0.05);
}

.reader-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line-soft);
  margin-bottom: 22px;
}

.reader-label {
  color: var(--faint);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.reader-card-head {
  border-bottom: 1px solid var(--line-soft);
  padding-bottom: 20px;
  margin-bottom: 8px;
}

.reader-card-eyebrow {
  color: var(--accent-deep);
  font-size: 10.5px;
  letter-spacing: 0.1em;
  margin-bottom: 12px;
}

.reader-card-title {
  font-size: clamp(1.5rem, 3vw, 2.05rem);
  line-height: 1.28;
  outline: none;
}

.reader-card-foot {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
  margin-top: 26px;
  padding-top: 18px;
  border-top: 1px solid var(--line-soft);
  font-size: var(--fs-xs);
}

.reader-loading {
  padding: 28px 0;
  color: var(--faint);
}

.reader-prereq {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 12px;
  margin-top: 16px;
}

.reader-prereq-label {
  color: var(--faint);
  font-size: 10px;
  letter-spacing: 0.1em;
}

.reader-prereq ul {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
}

.reader-prereq li {
  font-size: var(--fs-xs);
}

.reader-prereq .mono {
  margin-left: 6px;
  color: var(--faint);
  font-size: 10px;
}

.reader-layout.has-reader {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 330px;
  gap: clamp(24px, 4vw, 44px);
  align-items: start;
}

.reader-layout.has-reader .reader {
  margin-bottom: 0;
}

.reader-layout.has-reader .list-section {
  position: sticky;
  top: 86px;
  max-height: calc(100dvh - 108px);
  overflow-y: auto;
  align-self: start;
  border-left: 1px solid var(--line);
  padding-left: 20px;
}

.reader-layout.has-reader .list-section .kb-row-summary,
.reader-layout.has-reader .list-section .kb-row-prereq,
.reader-layout.has-reader .list-section .kb-row-tags,
.reader-layout.has-reader .list-section .case-goal,
.reader-layout.has-reader .list-section .case-params,
.reader-layout.has-reader .list-section .case-tags,
.reader-layout.has-reader .list-section .case-license {
  display: none;
}

.reader-layout.has-reader .case-grid {
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.reader-layout.has-reader .case-thumb {
  display: none;
}

.reader-layout.has-reader .case-body {
  padding: 12px 14px;
  gap: 6px;
}

.reader-layout.has-reader .case-title {
  font-size: 0.98rem;
}

.list-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px 20px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.list-title {
  font-size: 1.1rem;
}

.list-hint {
  color: var(--faint);
  font-size: 10.5px;
}

/* 知识库行 */
.kb-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 108px;
  gap: 20px;
  align-items: start;
  padding: 22px 0;
  border-bottom: 1px solid var(--line-soft);
}

.kb-row[hidden] {
  display: none;
}

.kb-row:hover,
.kb-row:focus-within {
  border-bottom-color: var(--accent-line);
}

.kb-row-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 12px;
  color: var(--faint);
  font-size: 10.5px;
  margin-bottom: 8px;
}

.kb-row-mod {
  color: var(--accent-deep);
  letter-spacing: 0.06em;
}

.kb-row-type {
  padding-left: 12px;
  border-left: 1px solid var(--line);
}

.kb-row-title {
  font-size: 1.1rem;
  line-height: 1.45;
}

.kb-row-title a {
  color: var(--ink);
  text-decoration: none;
}

.kb-row-title a:hover {
  color: var(--accent-deep);
  text-decoration: underline;
  text-decoration-color: var(--accent-line);
}

.kb-row-id {
  margin-top: 4px;
  color: var(--faint);
  font-size: 10.5px;
}

.kb-row-summary {
  margin-top: 9px;
  max-width: var(--measure);
  color: var(--muted);
  font-size: var(--fs-xs);
  line-height: 1.9;
}

.kb-row-prereq {
  margin-top: 8px;
  color: var(--faint);
  font-size: 10.5px;
}

.kb-row-prereq .mono {
  color: var(--ink-2);
  margin-right: 6px;
}

.kb-row-tags {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin-top: 12px;
}

.kb-row-updated {
  margin-left: auto;
  color: var(--faint);
  font-size: 10px;
}

.kb-row-open {
  min-height: 38px;
  padding: 0 12px;
  border: 1px solid var(--ink-2);
  background: transparent;
  color: var(--ink);
  font-size: 11px;
  cursor: pointer;
  align-self: start;
}

.kb-row-open:hover {
  background: var(--ink);
  color: var(--paper);
}

/* ---------- 13. 卡片正文 ---------- */
.card-body {
  max-width: calc(var(--measure) + 1em);
}

.card-sec {
  padding: clamp(20px, 3vw, 30px) 0;
  border-top: 1px solid var(--line-soft);
}

.card-sec:first-child {
  border-top: 0;
}

.card-sec.sec-def {
  border-top: 0;
  padding-top: 4px;
}

.card-sec-title {
  display: flex;
  align-items: baseline;
  gap: 12px;
  font-size: 1.04rem;
  color: var(--ink);
  margin-bottom: 14px;
}

.sec-no {
  color: var(--accent-deep);
  font-size: 11px;
  letter-spacing: 0.08em;
}

.sec-name {
  font-weight: 800;
}

.sec-kind {
  margin-left: auto;
  color: var(--faint);
  font-size: 9.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.card-sec-body > * + * {
  margin-top: 1em;
}

.card-sec-body table {
  min-width: 420px;
}

.card-sec .table-wrap {
  margin: 16px 0;
}

.sec-def .card-sec-body {
  color: var(--ink);
  font-size: 1.06rem;
  line-height: 1.95;
}

.sec-params .card-sec-body,
.sec-how .card-sec-body {
  color: var(--ink-2);
}

.sec-light .card-sec-body,
.sec-goal .card-sec-body {
  color: var(--ink);
}

.sec-license .card-sec-body {
  font-size: var(--fs-sm);
  color: var(--muted);
}

/* 正文排版 */
.prose {
  max-width: var(--measure);
  color: var(--ink-2);
  font-size: var(--fs-body);
  line-height: 1.9;
}

.prose > * + * {
  margin-top: 1em;
}

.prose h4,
.prose h5 {
  color: var(--ink);
  font-size: 1.02rem;
  margin-top: 1.5em;
}

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

.prose em {
  font-style: italic;
}

.prose code {
  padding: 1px 5px;
  background: var(--paper-deep);
  color: var(--accent-deep);
  font-size: 0.88em;
}

.prose pre code {
  padding: 0;
  background: none;
  color: inherit;
  font-size: inherit;
}

.prose ul,
.prose ol {
  display: grid;
  gap: 0.4em;
}

.prose ul > li {
  position: relative;
  padding-left: 1.2em;
}

.prose ul > li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--accent-deep);
}

.prose ol {
  counter-reset: item;
}

.prose ol > li {
  position: relative;
  padding-left: 1.9em;
  counter-increment: item;
}

.prose ol > li::before {
  content: counter(item) ".";
  position: absolute;
  left: 0;
  color: var(--accent-deep);
  font-family: var(--font-mono);
  font-size: 0.86em;
}

.prose blockquote {
  margin: 1.2em 0;
  padding: 2px 0 2px 16px;
  border-left: 3px solid var(--accent-line);
  color: var(--muted);
}

.prose hr {
  border: 0;
  border-top: 1px solid var(--line-soft);
  margin: 1.8em 0;
}

.prose del {
  color: var(--faint);
}

.prose .src-ref,
a.src-ref {
  font-size: 0.82em;
  color: var(--faint);
  text-decoration-color: var(--line);
}

a.card-ref {
  color: var(--accent-deep);
  text-decoration-style: dotted;
  text-decoration-color: var(--accent-line);
}

a.card-ref:hover {
  text-decoration-style: solid;
}

/* 自测题 */
.quiz-list {
  display: grid;
  gap: 12px;
}

.prose .quiz-list {
  counter-reset: none;
}

.prose .quiz-list > li {
  padding-left: 0;
  position: static;
}

.prose .quiz-list > li::before {
  content: none;
}

.quiz-item {
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent);
  background: var(--card);
  padding: 14px 16px;
}

.quiz-q {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px;
}

.quiz-no {
  color: var(--faint);
  font-size: 10.5px;
}

.quiz-tag,
.quiz-diff {
  padding: 1px 7px;
  border: 1px solid var(--line);
  background: var(--paper);
  color: var(--faint);
  font-size: 10px;
  line-height: 1.7;
  white-space: nowrap;
}

.quiz-diff {
  border-style: dashed;
}

.quiz-text {
  flex: 1 1 12em;
  min-width: 0;
  color: var(--ink);
  font-size: 0.97rem;
}

.quiz-answer {
  margin-top: 10px;
  border-top: 1px dashed var(--line);
  padding-top: 2px;
}

.quiz-answer summary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 32px;
  color: var(--muted);
  font-size: var(--fs-xs);
  cursor: pointer;
  list-style: none;
}

.quiz-answer summary::-webkit-details-marker {
  display: none;
}

.quiz-answer summary::before {
  content: "+";
  color: var(--accent-deep);
  font-family: var(--font-mono);
  width: 12px;
}

.quiz-answer[open] summary::before {
  content: "−";
}

.quiz-answer dl {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr);
  gap: 6px 14px;
  padding: 8px 0 6px;
  font-size: var(--fs-sm);
}

.quiz-answer dt {
  color: var(--accent-deep);
  font-size: 10.5px;
  padding-top: 3px;
}

.quiz-answer dd {
  color: var(--ink-2);
  line-height: 1.85;
  max-width: var(--measure);
}

.quiz-extra {
  grid-column: 2;
}

/* 独立卡片页 */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding-block: 22px;
  color: var(--faint);
  font-size: 10.5px;
}

.breadcrumb a {
  color: var(--muted);
  text-decoration: none;
}

.breadcrumb a:hover {
  color: var(--accent-deep);
}

.card-head {
  padding-bottom: clamp(20px, 3vw, 30px);
  border-bottom: 1px solid var(--line);
}

.card-eyebrow {
  color: var(--accent-deep);
  font-size: 10.5px;
  letter-spacing: 0.1em;
  margin-bottom: 14px;
}

.card-page-title {
  font-size: clamp(1.75rem, 4.2vw, 2.6rem);
  line-height: 1.24;
  max-width: 22em;
}

.card-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 32px;
  margin-top: 20px;
  font-size: var(--fs-xs);
}

.card-meta > div {
  display: flex;
  align-items: center;
  gap: 8px;
}

.card-meta dt {
  color: var(--faint);
  letter-spacing: 0.06em;
}

.card-meta dd {
  color: var(--ink-2);
}

.card-meta a {
  color: var(--ink-2);
}

.card-toc {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 18px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line-soft);
}

.card-toc-label {
  color: var(--faint);
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.card-toc ol {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 16px;
}

.card-toc a {
  color: var(--muted);
  font-size: 11px;
  text-decoration: none;
}

.card-toc a span {
  color: var(--faint);
  margin-right: 6px;
  font-size: 10px;
}

.card-toc a:hover {
  color: var(--accent-deep);
}

.card-page .card-body {
  padding-top: 8px;
}

.card-foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: 40px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
}

.card-foot-note {
  max-width: 44em;
  color: var(--faint);
  font-size: 11.5px;
  line-height: 1.8;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 22px 28px;
  margin-top: 34px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}

.related-title {
  color: var(--faint);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-bottom: 10px;
}

.related ul {
  display: grid;
  gap: 8px;
  font-size: var(--fs-xs);
}

.related .mono {
  color: var(--faint);
  font-size: 10px;
  margin-left: 6px;
}

.source-list {
  display: grid;
  gap: 8px;
  font-size: var(--fs-xs);
  line-height: 1.7;
}

.src-id {
  color: var(--faint);
  font-size: 10px;
  margin-right: 6px;
}

.card-pager {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
  margin-top: 32px;
  padding-top: 22px;
  border-top: 1px solid var(--line-soft);
}

.cardnav {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 16px;
  border: 1px solid var(--line);
  background: var(--card);
  color: var(--ink-2);
  font-size: var(--fs-sm);
  text-decoration: none;
}

.cardnav .mono {
  color: var(--faint);
  font-size: 10px;
}

.cardnav:hover {
  border-color: var(--accent-deep);
}

.cardnav-next {
  text-align: right;
  align-items: flex-end;
}

/* ---------- 14. 收藏档案 ---------- */
.collection-count {
  margin-top: 22px;
  color: var(--faint);
  font-size: 11px;
}

.item-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}

.item-card {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  border: 1px solid var(--line);
  background: var(--card);
  box-shadow: 4px 4px 0 rgba(31, 26, 20, 0.06);
  min-width: 0;
}

.item-visual {
  border-right: 1px solid var(--line-soft);
  padding: 12px;
  background: var(--paper);
}

.item-photo {
  aspect-ratio: 4 / 5;
  background: var(--paper-deep);
  border: 1px solid var(--line-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.item-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.item-photo.is-empty {
  flex-direction: column;
  gap: 6px;
  border-style: dashed;
  color: var(--faint);
  font-size: 11px;
  text-align: center;
  padding: 12px;
}

.item-photo-hint {
  font-size: 10px;
  color: var(--faint);
}

.item-body {
  padding: 18px 20px 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-width: 0;
}

.item-title {
  font-size: 1.12rem;
  line-height: 1.42;
}

.item-fields {
  display: grid;
  gap: 6px;
  font-size: var(--fs-xs);
}

.item-fields > div {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding-bottom: 5px;
  border-bottom: 1px dashed var(--line-soft);
}

.item-fields dt {
  color: var(--faint);
  font-size: 10px;
  letter-spacing: 0.08em;
  min-width: 42px;
}

.item-fields dd {
  color: var(--ink-2);
  min-width: 0;
  overflow-wrap: break-word;
}

.item-note {
  font-size: var(--fs-xs);
  line-height: 1.85;
  color: var(--muted);
}

.item-note h4,
.item-note h5 {
  font-size: 0.9rem;
  color: var(--ink);
  margin: 10px 0 4px;
}

.item-note > * + * {
  margin-top: 0.7em;
}

.item-tags {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin-top: auto;
  padding-top: 8px;
}

.item-updated {
  margin-left: auto;
  color: var(--faint);
  font-size: 10px;
}

.empty-state {
  border: 1px solid var(--line);
  background: var(--card);
  padding: clamp(22px, 4vw, 36px);
  margin-bottom: 22px;
}

.empty-state-title {
  font-family: var(--font-serif);
  font-size: clamp(1.6rem, 3.4vw, 2.2rem);
  color: var(--accent-deep);
  line-height: 1.2;
}

.empty-state-note {
  margin-top: 12px;
  max-width: var(--measure);
  color: var(--muted);
  font-size: var(--fs-sm);
  line-height: 1.9;
}

.slot-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.item-slot {
  border: 1px dashed var(--line);
  background: repeating-linear-gradient(
    -45deg,
    rgba(255, 253, 248, 0.55),
    rgba(255, 253, 248, 0.55) 9px,
    rgba(236, 227, 211, 0.5) 9px,
    rgba(236, 227, 211, 0.5) 18px
  );
  padding: 20px 18px;
  min-height: 190px;
}

.item-slot-no {
  color: var(--faint);
  font-size: 10px;
  letter-spacing: 0.12em;
}

.item-slot-title {
  margin-top: 18px;
  font-family: var(--font-serif);
  font-size: 1.6rem;
  color: var(--faint);
}

.item-slot-text {
  margin-top: 8px;
  color: var(--faint);
  font-size: var(--fs-xs);
  line-height: 1.85;
  max-width: 26em;
}

.steps {
  counter-reset: step;
  display: grid;
  gap: 12px;
  max-width: 52em;
}

.steps li {
  position: relative;
  padding-left: 34px;
  color: var(--muted);
  font-size: var(--fs-sm);
  line-height: 1.9;
  counter-increment: step;
}

.steps li::before {
  content: counter(step, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 0.2em;
  color: var(--accent-deep);
  font-family: var(--font-mono);
  font-size: 11px;
}

.boundary-how {
  margin-top: 24px;
  padding: 14px 18px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent);
  background: var(--card);
  color: var(--ink-2);
  font-size: var(--fs-xs);
  line-height: 1.9;
  max-width: 56em;
}

/* ---------- 15. 学伴 ---------- */
.role-line {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px;
  margin-top: 24px;
  padding: 12px 16px;
  border-left: 3px solid var(--accent);
  background: var(--accent-soft);
  color: var(--ink);
  font-size: var(--fs-sm);
}

.role-line .mono {
  color: var(--accent-deep);
  font-size: 10px;
  letter-spacing: 0.12em;
}

.mode-table {
  min-width: 640px;
}

.mode-name {
  color: var(--ink);
  font-weight: 700;
  white-space: nowrap;
}

.mode-gets {
  color: var(--faint);
  font-size: 10.5px;
  white-space: nowrap;
}

.demo-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 22px;
  padding: 14px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line-soft);
}

.demo-badge {
  padding: 3px 10px;
  border: 1px solid var(--accent-line);
  color: var(--accent-deep);
  font-size: 10.5px;
  letter-spacing: 0.06em;
}

.demo-badge.is-real {
  border-style: solid;
}

.demo-badge.is-mock {
  border-style: dashed;
}

.demo-badge.is-placeholder {
  border-style: dashed;
  border-color: var(--line);
  color: var(--muted);
}

.demo-source,
.demo-summary {
  color: var(--faint);
  font-size: 10.5px;
}

.demo-note {
  max-width: 54em;
}

.demo-filter {
  margin-top: 22px;
}

.demo-filter .chips {
  margin-top: 9px;
}

.turns {
  margin-top: 22px;
  border-top: 1px solid var(--line);
}

.turn {
  padding: clamp(22px, 3vw, 32px) 0;
  border-bottom: 1px solid var(--line-soft);
}

.turn[hidden] {
  display: none;
}

.turn-head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 14px;
}

.turn-no {
  color: var(--faint);
  font-size: 10.5px;
}

.turn-mode {
  color: var(--accent-deep);
  font-size: 10.5px;
  letter-spacing: 0.08em;
}

.turn-user,
.turn-assistant {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 16px;
  margin-bottom: 18px;
}

.turn-role {
  color: var(--faint);
  font-size: 10.5px;
  letter-spacing: 0.1em;
  padding-top: 4px;
}

.turn-user-text {
  max-width: var(--measure);
  color: var(--ink);
  font-size: 1rem;
  line-height: 1.85;
}

.turn-answer {
  max-width: var(--measure);
  color: var(--ink-2);
}

.turn-plan {
  margin-top: 16px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent);
  background: var(--card);
  padding: 16px 18px;
  max-width: 56em;
}

.turn-plan-label {
  color: var(--accent-deep);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-bottom: 10px;
}

.plan-table {
  display: grid;
  gap: 8px;
  font-size: var(--fs-xs);
}

.plan-row {
  display: grid;
  grid-template-columns: 74px minmax(0, 1fr);
  gap: 12px;
  padding-bottom: 8px;
  border-bottom: 1px dashed var(--line-soft);
}

.plan-row:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.plan-row dt {
  color: var(--faint);
  letter-spacing: 0.06em;
  padding-top: 2px;
}

.plan-row dd {
  color: var(--ink-2);
  line-height: 1.85;
}

.turn-cites,
.turn-followups {
  margin-left: 62px;
  margin-top: 8px;
  padding-top: 14px;
  border-top: 1px dashed var(--line-soft);
}

.turn-cites-label {
  color: var(--faint);
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 8px;
}

.turn-cites ul,
.turn-followups ul {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.cite {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 5px 11px;
  border: 1px solid var(--line);
  background: var(--card);
  color: var(--ink-2);
  font-size: var(--fs-xs);
  text-decoration: none;
}

.cite .mono {
  color: var(--faint);
  font-size: 10px;
}

a.cite:hover {
  border-color: var(--accent-deep);
  color: var(--accent-deep);
}

.cite-missing {
  color: var(--faint);
  border-style: dashed;
}

.turn-followups li {
  padding: 5px 11px;
  border: 1px dashed var(--line);
  color: var(--faint);
  font-size: var(--fs-xs);
}

.run-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.9fr);
  gap: clamp(26px, 4vw, 52px);
  align-items: start;
}

.run-intro {
  color: var(--ink-2);
  max-width: 38em;
}

.run-note {
  color: var(--muted);
  font-size: var(--fs-sm);
  line-height: 1.9;
  max-width: 40em;
}

.run-api {
  margin-top: 18px;
  color: var(--faint);
  font-size: 10.5px;
  word-break: break-word;
}

.run-aside {
  border: 1px solid var(--line);
  border-top: 3px solid var(--accent);
  background: var(--card);
  padding: clamp(18px, 3vw, 26px);
  box-shadow: 4px 4px 0 rgba(31, 26, 20, 0.05);
}

.run-aside-title {
  font-size: 1rem;
  margin-bottom: 14px;
}

.limits {
  display: grid;
  gap: 10px;
  font-size: var(--fs-xs);
  line-height: 1.9;
  color: var(--muted);
}

.limits li {
  position: relative;
  padding-left: 16px;
}

.limits li::before {
  content: "▪";
  position: absolute;
  left: 0;
  color: var(--accent-deep);
  font-size: 9px;
}

/* ---------- 16. 日志 ---------- */
.log-source {
  color: var(--faint);
  font-size: 10.5px;
  margin-bottom: 8px;
}

.log-list {
  border-top: 1px solid var(--line);
}

.log-entry {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  padding: clamp(24px, 3.5vw, 36px) 0 clamp(24px, 3.5vw, 36px) clamp(24px, 3vw, 34px);
  border-bottom: 1px solid var(--line-soft);
}

.log-rail {
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 1px;
  background: var(--line);
}

.log-dot {
  position: absolute;
  left: -4px;
  top: clamp(30px, 4vw, 42px);
  width: 9px;
  height: 9px;
  background: var(--paper);
  border: 1px solid var(--accent);
}

.log-date {
  color: var(--accent-deep);
  font-size: 11px;
  letter-spacing: 0.08em;
  margin-bottom: 8px;
}

.log-title {
  font-size: clamp(1.14rem, 2.4vw, 1.4rem);
  margin-bottom: 12px;
}

/* ---------- 17. 关于 ---------- */
.about-why {
  max-width: var(--measure);
  margin-top: 18px;
  color: var(--muted);
  font-size: var(--fs-sm);
  line-height: 1.95;
}

.about-facts {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 8px 22px;
  margin-top: 26px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
  font-size: var(--fs-xs);
  max-width: 520px;
}

.about-facts dt {
  color: var(--faint);
}

.about-facts dd {
  color: var(--ink-2);
}

.method-list {
  border-top: 1px solid var(--line);
}

.method-item {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.6fr);
  gap: clamp(16px, 3vw, 40px);
  padding: clamp(20px, 3vw, 28px) 0;
  border-bottom: 1px solid var(--line-soft);
  scroll-margin-top: 92px;
}

.method-title {
  font-size: 1rem;
  line-height: 1.5;
}

.method-item p {
  color: var(--muted);
  font-size: var(--fs-sm);
  line-height: 1.95;
  max-width: 44em;
}

.tool-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.tool {
  background: var(--card);
  padding: clamp(18px, 3vw, 26px);
}

.tool:last-child:nth-child(odd) {
  grid-column: 1 / -1;
}

.tool-title {
  font-size: 0.98rem;
  margin-bottom: 9px;
}

.tool p {
  color: var(--muted);
  font-size: var(--fs-xs);
  line-height: 1.95;
}

.boundary-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(20px, 4vw, 44px);
}

.boundary-col {
  border-top: 2px solid var(--ink);
  padding-top: 18px;
}

.boundary-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.98rem;
  margin-bottom: 14px;
}

.badge {
  padding: 1px 8px;
  font-size: 10px;
  letter-spacing: 0.08em;
  font-weight: 400;
  border: 1px solid var(--line);
  color: var(--faint);
}

.badge-public {
  color: var(--accent-deep);
  border-color: var(--accent-line);
}

.badge-private {
  border-style: dashed;
}

.boundary-col ul {
  display: grid;
  gap: 8px;
  font-size: var(--fs-xs);
  color: var(--muted);
  line-height: 1.9;
}

.boundary-col li {
  position: relative;
  padding-left: 16px;
}

.boundary-col li::before {
  content: "·";
  position: absolute;
  left: 2px;
  color: var(--accent-deep);
}

.policy-list {
  display: grid;
  gap: 12px;
  max-width: 58em;
  counter-reset: policy;
}

.policy-list li {
  position: relative;
  padding-left: 30px;
  color: var(--muted);
  font-size: var(--fs-sm);
  line-height: 1.95;
  counter-increment: policy;
}

.policy-list li::before {
  content: counter(policy, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 0.22em;
  color: var(--accent-deep);
  font-family: var(--font-mono);
  font-size: 10px;
}

.license-table {
  margin-top: 30px;
}

.license-table-title {
  color: var(--faint);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-bottom: 10px;
}

.license-note {
  margin-top: 10px;
  color: var(--faint);
  font-size: 10px;
}

.disclaimer-box {
  border: 1px solid var(--accent-line);
  border-left: 4px solid var(--accent);
  background: var(--accent-soft);
  padding: clamp(18px, 3vw, 26px);
  max-width: 56em;
}

.disclaimer-label {
  color: var(--accent-deep);
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  margin-bottom: 10px;
}

.disclaimer-box p:last-child {
  color: var(--ink);
  font-size: var(--fs-sm);
  line-height: 1.95;
}

.build-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.9fr);
  gap: clamp(24px, 4vw, 48px);
  align-items: start;
}

.build-text {
  color: var(--ink-2);
  max-width: 40em;
}

.build-note {
  color: var(--faint);
  font-size: 10.5px;
  line-height: 1.8;
  word-break: break-word;
}

.build-stats {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 8px 18px;
  padding: 18px 20px;
  border: 1px solid var(--line);
  background: var(--card);
  font-size: var(--fs-xs);
}

.build-stats dt {
  color: var(--faint);
}

.build-stats dd {
  color: var(--ink-2);
  word-break: break-word;
}

.empty-note {
  padding: 26px 0;
  color: var(--faint);
  font-size: var(--fs-sm);
}

/* ---------- 18. 响应式 ---------- */
@media (max-width: 1080px) {
  .footer-inner {
    grid-template-columns: 1.5fr 1fr 1fr;
  }

  .footer-meta {
    grid-column: 1 / -1;
    border-top: 1px solid var(--line);
    padding-top: 22px;
  }

  .item-card {
    grid-template-columns: minmax(0, 1fr);
  }

  .item-visual {
    border-right: 0;
    border-bottom: 1px solid var(--line-soft);
  }

  .item-photo {
    aspect-ratio: 16 / 10;
  }
}

@media (max-width: 940px) {
  .site-nav {
    mask-image: linear-gradient(to right, #000 88%, transparent 100%);
    -webkit-mask-image: linear-gradient(to right, #000 88%, transparent 100%);
  }

  .hero {
    grid-template-columns: minmax(0, 1fr);
    gap: 36px;
  }

  .hero-figure {
    max-width: 34em;
  }

  .paths {
    grid-template-columns: minmax(0, 1fr);
  }

  .pipeline {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .pipe-step:nth-child(2n) a {
    padding-right: 0;
  }

  .run-grid,
  .build-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .method-item {
    grid-template-columns: minmax(0, 1fr);
    gap: 10px;
  }

  .case-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .reader-layout.has-reader {
    grid-template-columns: minmax(0, 1fr);
  }

  .reader-layout.has-reader .list-section {
    position: static;
    max-height: none;
    overflow: visible;
    border-left: 0;
    padding-left: 0;
    border-top: 1px solid var(--line);
    padding-top: 24px;
  }

  .dep-figure {
    display: none;
  }

  .item-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .station-head {
    grid-template-columns: 70px minmax(0, 1fr);
  }

  .station-status {
    grid-column: 2;
    flex-direction: row;
    align-items: center;
    justify-content: flex-start;
    margin-top: 4px;
  }

  .station-body {
    padding-left: calc(70px + 12px);
  }
}

@media (max-width: 760px) {
  .metrics {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .metric:nth-child(3n) {
    border-right: 1px solid var(--line-soft);
  }

  .metric:nth-child(2n) {
    border-right: 0;
  }

  .metric:nth-last-child(-n + 3) {
    border-bottom: 1px solid var(--line-soft);
  }

  .metric:nth-last-child(-n + 2) {
    border-bottom: 0;
  }

  .question {
    grid-template-columns: 52px minmax(0, 1fr);
  }

  .station {
    padding-left: 20px;
  }

  .station-head {
    grid-template-columns: minmax(0, 1fr);
    gap: 8px;
  }

  .station-code {
    font-size: 1.4rem;
  }

  .station-status {
    grid-column: 1;
  }

  .station-body {
    padding-left: 0;
  }

  .shelf-row {
    grid-template-columns: minmax(0, 1fr) 52px;
    gap: 8px 12px;
  }

  .shelf-row .shelf-type,
  .shelf-row .shelf-date {
    display: none;
  }

  .shelf-id {
    display: none;
  }

  .kb-row {
    grid-template-columns: minmax(0, 1fr);
    gap: 12px;
  }

  .kb-row-open {
    justify-self: start;
    min-height: 40px;
  }

  .item-card {
    grid-template-columns: minmax(0, 1fr);
  }

  .item-photo {
    aspect-ratio: 4 / 3;
  }

  .slot-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .boundary-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 28px;
  }

  .tool-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .footer-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 26px;
  }

  .question-no {
    font-size: 1.5rem;
  }

  .spec-row {
    grid-template-columns: 66px minmax(0, 1fr);
    gap: 12px;
  }

  .section-title {
    font-size: 1.38rem;
  }

  .page-title {
    font-size: 1.8rem;
  }

  .turn-cites,
  .turn-followups {
    margin-left: 0;
  }

  .turn-user,
  .turn-assistant {
    grid-template-columns: minmax(0, 1fr);
    gap: 4px;
  }

  .turn-role {
    padding-top: 0;
  }
}

@media (max-width: 560px) {
  .header-inner {
    min-height: 60px;
    gap: 10px;
  }

  .brand-en {
    display: none;
  }

  .brand-cn {
    font-size: 1.05rem;
  }

  .site-nav a {
    padding: 0 9px;
    font-size: 13px;
  }

  .hero-claim {
    font-size: clamp(2rem, 10vw, 2.5rem);
  }

  .hero {
    padding-top: 30px;
  }

  .chain-strip {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }

  .chain {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 6px 14px;
    width: 100%;
  }

  .chain li:not(:last-child)::after {
    display: none;
  }

  .pipeline {
    grid-template-columns: minmax(0, 1fr);
  }

  .pipe-step a {
    padding-right: 0;
  }

  .metric {
    padding: 16px;
  }

  .metric-value {
    font-size: 1.9rem;
  }

  .question {
    gap: 14px;
  }

  .question-title {
    font-size: 1.12rem;
  }

  .quiz-answer dl {
    grid-template-columns: minmax(0, 1fr);
    gap: 2px 0;
  }

  .quiz-answer dt {
    margin-top: 8px;
  }

  .quiz-extra {
    grid-column: 1;
  }

  .card-toc {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .slot-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .item-slot {
    min-height: 150px;
  }

  .plate-stack {
    margin-top: 18px;
  }

  .to-top {
    min-height: 44px;
  }
}

/* ---------- 19. 动效偏好与打印 ---------- */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

@media print {
  :root {
    --paper: #fff;
    --paper-deep: #f4f4f4;
    --card: #fff;
    --ink: #111;
    --ink-2: #222;
    --muted: #333;
    --faint: #555;
    --line: #bbb;
    --line-soft: #ddd;
    --accent: #8a2a12;
    --accent-deep: #6d2110;
    --accent-soft: #fff;
  }

  body {
    background: #fff;
  }

  .site-header,
  .site-footer,
  .to-top,
  .notice,
  .card-toc,
  .breadcrumb,
  .card-pager,
  .toolbar,
  .reader-bar {
    display: none !important;
  }

  .card-body,
  .prose {
    max-width: none;
  }

  a {
    color: #111;
  }

  .card-sec,
  .case-card {
    break-inside: avoid;
  }

  .quiz-answer {
    display: block;
  }
}