/* =====================================================================
   DataShine · Literature Atlas
   文献阅读页样式：沿用 INTERACTION ATLAS 令牌（奶油纸面 / 墨黑 / 荧光黄绿）
   本文件仅作用于 .lit-* 命名空间，不影响工作台既有样式。
   ===================================================================== */

.lit-body {
  min-height: 100vh;
  background-color: var(--paper);
  background-image:
    linear-gradient(rgba(17, 17, 17, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(17, 17, 17, 0.025) 1px, transparent 1px);
  background-size: 48px 48px;
  color: var(--ink-950);
  font-family: var(--font-sans);
}

.lit-body h1,
.lit-body h2,
.lit-body h3,
.lit-body p {
  margin: 0;
}

.lit-body a {
  color: inherit;
  text-decoration: none;
}

.lit-body button {
  cursor: pointer;
  font-family: inherit;
}

.lit-body :focus-visible {
  outline: 2px solid var(--focus-blue);
  outline-offset: 2px;
}

/* —— 顶部已读进度条 —— */
.lit-progress {
  position: fixed;
  inset: 0 0 auto 0;
  height: 3px;
  background: var(--gray-200);
  z-index: 60;
}

.lit-progress span {
  display: block;
  height: 100%;
  width: 0;
  background: var(--ink-950);
  transition: width 0.35s ease;
}

/* —— 顶栏 —— */
.lit-top {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 12px clamp(16px, 4vw, 44px);
  background: rgba(247, 245, 240, 0.92);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(10px);
}

.lit-brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.lit-mark {
  display: flex;
  align-items: center;
  width: 42px;
  height: 30px;
  padding: 0 5px;
  border: 1px solid var(--ink-950);
  border-radius: 6px;
  background: var(--white);
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 700;
  justify-content: space-between;
}

.lit-mark i {
  width: 2px;
  height: 14px;
  background: var(--accent);
}

.lit-brand-copy {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.lit-brand-copy strong {
  font-family: var(--font-display);
  font-size: 15px;
  letter-spacing: -0.01em;
}

.lit-brand-copy small {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.16em;
  color: var(--gray-500);
}

.lit-crumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 700;
  color: var(--gray-500);
}

.lit-crumb a:hover {
  color: var(--ink-950);
}

.lit-crumb [aria-current] {
  color: var(--ink-950);
}

.lit-slash {
  opacity: 0.4;
}

.lit-top-actions {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 12px;
}

.lit-counter {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--gray-700);
  padding: 4px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  white-space: nowrap;
}

.lit-ghost {
  border: none;
  background: transparent;
  color: var(--gray-700);
  font-size: 12px;
  font-weight: 800;
  padding: 6px 8px;
  border-radius: 8px;
}

.lit-ghost:hover {
  background: var(--gray-100);
  color: var(--ink-950);
}

.lit-back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border-radius: 999px;
  background: var(--ink-950);
  color: #ffffff;
  font-size: 12px;
  font-weight: 800;
  white-space: nowrap;
  transition: background 0.15s ease, color 0.15s ease;
}

/* 提升特异性，避免被 `.lit-body a { color: inherit }` 覆盖成黑底黑字 */
.lit-body .lit-back {
  color: #ffffff;
}

.lit-body .lit-back:hover {
  background: var(--accent);
  color: var(--ink-950);
}

/* —— 主体 —— */
.lit-main {
  width: min(1340px, 100%);
  margin: 0 auto;
  padding: clamp(28px, 5vw, 56px) clamp(16px, 4vw, 44px) 72px;
}

/* —— Hero —— */
.lit-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
  gap: clamp(24px, 4vw, 56px);
  align-items: end;
  padding-bottom: clamp(28px, 4vw, 44px);
  border-bottom: 1px solid var(--line-strong);
}

.lit-eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--gray-500);
  text-transform: uppercase;
}

.lit-eyebrow span {
  padding: 3px 8px;
  background: var(--accent);
  color: var(--ink-950);
  border-radius: 4px;
}

.lit-hero h1 {
  margin-top: 18px;
  font-family: var(--font-sans);
  font-size: clamp(38px, 6vw, 74px);
  font-weight: 900;
  line-height: 1.18;
  letter-spacing: -0.03em;
}

.lit-en {
  margin-top: 12px;
  font-family: "Source Serif 4", var(--font-display);
  font-size: clamp(12px, 1.5vw, 15px);
  font-weight: 600;
  letter-spacing: 0.16em;
  color: var(--gray-500);
}

.lit-lead {
  margin-top: 20px;
  max-width: 62ch;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--gray-700);
}

.lit-lead strong {
  color: var(--ink-950);
  font-weight: 800;
  box-shadow: inset 0 -0.55em 0 var(--accent-soft);
}

.lit-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--white);
}

.lit-stat {
  padding: 16px 14px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.lit-stat:nth-child(3n) {
  border-right: none;
}

.lit-stat strong {
  font-family: var(--font-num);
  font-size: clamp(26px, 3vw, 34px);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1;
}

.lit-stat span {
  font-family: var(--font-mono);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--gray-500);
}

.lit-stat small {
  font-size: 10.5px;
  color: var(--gray-500);
  line-height: 1.4;
}

.lit-stat-wide {
  grid-column: span 3;
  border-right: none;
  border-bottom: none;
  background: var(--ink-950);
  color: var(--white);
}

.lit-stat-wide span {
  color: var(--accent);
}

.lit-stat-wide small {
  color: rgba(255, 255, 255, 0.6);
}

/* —— 研究脉络 —— */
.lit-threads {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr;
  gap: 14px;
  align-items: stretch;
  padding: 26px 0;
  border-bottom: 1px solid var(--line);
}

.lit-thread {
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.62);
  transition: background 0.18s ease, border-color 0.18s ease;
}

.lit-thread:hover {
  background: var(--white);
  border-color: var(--line-strong);
}

.lit-thread-no {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  color: var(--gray-500);
}

.lit-thread h2 {
  margin-top: 6px;
  font-size: 15px;
  font-weight: 900;
  letter-spacing: -0.01em;
}

.lit-thread p {
  margin-top: 6px;
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--gray-700);
}

.lit-thread-tag {
  display: block;
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 9.5px;
  letter-spacing: 0.06em;
  color: var(--gray-500);
}

.lit-thread-arrow {
  display: grid;
  place-items: center;
  font-size: 16px;
  color: var(--gray-300);
}

/* —— 筛选控件 —— */
.lit-controls {
  position: sticky;
  top: 55px;
  z-index: 30;
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  padding: 16px 0;
  background: linear-gradient(var(--paper) 78%, rgba(247, 245, 240, 0));
}

.lit-seg {
  display: flex;
  gap: 4px;
  padding: 4px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: var(--white);
}

.lit-seg-btn {
  border: none;
  background: transparent;
  color: var(--gray-700);
  font-size: 12.5px;
  font-weight: 800;
  padding: 7px 14px;
  border-radius: 999px;
  transition: background 0.15s ease, color 0.15s ease;
}

.lit-seg-btn b {
  font-family: var(--font-mono);
  font-size: 10px;
  margin-left: 4px;
  opacity: 0.55;
}

.lit-seg-btn:hover {
  background: var(--gray-100);
}

.lit-seg-btn.is-active {
  background: var(--ink-950);
  color: var(--white);
}

.lit-seg-btn.is-active b {
  color: var(--accent);
  opacity: 1;
}

.lit-tools {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.lit-search {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 12px;
  height: 38px;
  min-width: min(320px, 60vw);
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  background: var(--white);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.lit-search:focus-within {
  border-color: var(--ink-950);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.lit-search span {
  color: var(--gray-500);
  font-size: 15px;
}

.lit-search input {
  flex: 1;
  border: none;
  outline: none;
  background: transparent;
  font-size: 12.5px;
  font-weight: 600;
  color: var(--ink-950);
}

.lit-search input::placeholder {
  color: var(--gray-500);
  font-weight: 500;
}

.lit-check {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 700;
  color: var(--gray-700);
  cursor: pointer;
  user-select: none;
}

.lit-check input {
  accent-color: var(--ink-950);
  width: 14px;
  height: 14px;
}

.lit-result {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  color: var(--gray-500);
  white-space: nowrap;
}

/* —— 文献卡片网格 —— */
.lit-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(330px, 1fr));
  gap: 18px;
  margin-top: 8px;
}

.lit-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--white);
  overflow: hidden;
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
  animation: lit-rise 0.4s ease both;
}

.lit-card::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 3px;
  background: var(--accent);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform 0.25s ease;
}

.lit-card:hover {
  transform: translateY(-3px);
  border-color: var(--line-strong);
  box-shadow: var(--shadow-float);
}

.lit-card:hover::before {
  transform: scaleY(1);
}

.lit-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.lit-no {
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 700;
  letter-spacing: -0.05em;
  line-height: 1;
  color: var(--ink-950);
}

.lit-theme {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 9.5px;
  font-weight: 700;
  letter-spacing: 0.1em;
  padding: 4px 9px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  color: var(--gray-700);
  text-transform: uppercase;
}

.lit-theme::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--gray-500);
}

.lit-card[data-theme="agent"] .lit-theme::before {
  background: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-soft);
}

.lit-card[data-theme="survey"] .lit-theme::before {
  background: var(--ink-950);
}

.lit-card[data-theme="eval"] .lit-theme::before {
  background: var(--focus-blue);
}

.lit-card h3 {
  font-family: var(--font-display);
  font-size: 16.5px;
  font-weight: 700;
  line-height: 1.32;
  letter-spacing: -0.015em;
}

.lit-card-zh {
  font-size: 12.5px;
  font-weight: 700;
  line-height: 1.55;
  color: var(--gray-700);
}

.lit-authors {
  font-size: 11.5px;
  line-height: 1.5;
  color: var(--gray-500);
}

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

.lit-tag {
  font-size: 10.5px;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 5px;
  background: var(--gray-100);
  color: var(--gray-700);
}

.lit-why {
  padding: 10px 12px;
  border-left: 2px solid var(--accent);
  background: var(--paper);
  border-radius: 0 8px 8px 0;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--ink-800);
}

.lit-why b {
  display: block;
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.14em;
  color: var(--gray-500);
  margin-bottom: 3px;
}

.lit-points {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.lit-points li {
  position: relative;
  padding-left: 14px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--gray-700);
}

.lit-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 7px;
  width: 6px;
  height: 1px;
  background: var(--gray-300);
}

.lit-card-foot {
  margin-top: auto;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.lit-date {
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 700;
  color: var(--gray-500);
  letter-spacing: 0.04em;
}

.lit-acts {
  display: flex;
  gap: 6px;
}

.lit-act {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
  padding: 7px 12px;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  background: var(--white);
  color: var(--ink-950);
  font-size: 11.5px;
  font-weight: 800;
  line-height: 1;
  transition: background 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}

.lit-body .lit-act:hover {
  background: var(--gray-100);
  border-color: var(--ink-950);
}

.lit-body a.lit-act {
  color: var(--ink-950);
}

.lit-act-primary {
  background: var(--ink-950);
  border-color: var(--ink-950);
  color: var(--white);
}

.lit-act-primary:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--ink-950);
}

.lit-card.is-read {
  background: linear-gradient(180deg, var(--white), rgba(234, 251, 176, 0.18));
}

.lit-card.is-read .lit-no {
  color: var(--gray-500);
}

.lit-card.is-read .lit-act-primary {
  background: var(--gray-100);
  border-color: var(--line-strong);
  color: var(--gray-700);
}

.lit-read-stamp {
  padding: 3px 8px;
  border: 1px solid var(--ink-950);
  border-radius: 4px;
  background: var(--accent);
  font-family: var(--font-mono);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.12em;
  transform: rotate(-4deg);
}

.lit-flags {
  display: flex;
  align-items: center;
  gap: 8px;
}

.lit-empty {
  padding: 60px 0;
  text-align: center;
  font-size: 13px;
  color: var(--gray-500);
}

/* —— 页脚说明 —— */
.lit-footnote {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 28px;
  margin-top: 44px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}

.lit-footnote-label {
  font-family: var(--font-mono);
  font-size: 9.5px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--gray-500);
}

.lit-footnote p {
  margin-top: 8px;
  font-size: 12.5px;
  line-height: 1.75;
  color: var(--gray-700);
}

.lit-footnote code {
  font-family: var(--font-mono);
  font-size: 11px;
  padding: 1px 5px;
  border-radius: 4px;
  background: var(--gray-100);
  color: var(--ink-950);
}

.lit-footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 24px;
  padding: 24px clamp(16px, 4vw, 44px) 40px;
  border-top: 1px solid var(--line);
  color: var(--gray-500);
  font-size: 12px;
  font-weight: 600;
}

.lit-footer strong {
  color: var(--ink-950);
  font-family: var(--font-display);
  font-size: 17px;
}

.lit-footer a {
  margin-left: auto;
  font-weight: 800;
  color: var(--ink-950);
}

.lit-footer a:hover {
  box-shadow: inset 0 -0.55em 0 var(--accent);
}

/* —— PDF 阅读器 —— */
.lit-reader {
  position: fixed;
  inset: 0;
  z-index: 80;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: clamp(0px, 2vw, 24px);
}

.lit-reader[hidden] {
  display: none;
}

.lit-reader-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(10, 10, 10, 0.55);
  backdrop-filter: blur(4px);
}

.lit-reader-panel {
  position: relative;
  width: min(1280px, 100%);
  height: min(880px, 100%);
  display: flex;
  flex-direction: column;
  background: var(--paper);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 30px 90px rgba(0, 0, 0, 0.3);
  animation: lit-pop 0.25s ease both;
}

.lit-reader-head {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 12px 16px;
  background: var(--white);
  border-bottom: 1px solid var(--line);
}

.lit-reader-id {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.lit-reader-no {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  flex: 0 0 auto;
  border-radius: 8px;
  background: var(--accent);
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
}

.lit-reader-id > div {
  min-width: 0;
}

.lit-reader-id strong {
  display: block;
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 700;
  line-height: 1.3;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.lit-reader-id small {
  display: block;
  margin-top: 2px;
  font-size: 11px;
  color: var(--gray-500);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.lit-reader-actions {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 6px;
  flex: 0 0 auto;
}

.lit-reader-close {
  width: 32px;
  height: 32px;
  margin-left: 4px;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  background: var(--white);
  font-size: 13px;
  font-weight: 700;
}

.lit-reader-close:hover {
  background: var(--err);
  border-color: var(--err);
  color: var(--white);
}

.lit-reader-body {
  flex: 1;
  min-height: 0;
  display: grid;
  grid-template-columns: 300px minmax(0, 1fr);
}

.lit-reader-side {
  overflow-y: auto;
  padding: 18px;
  border-right: 1px solid var(--line);
  background: var(--paper);
}

.lit-reader-side h4 {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 9.5px;
  letter-spacing: 0.14em;
  color: var(--gray-500);
}

.lit-reader-side p {
  font-size: 12.5px;
  line-height: 1.75;
  color: var(--gray-700);
}

.lit-reader-side .lit-side-block + .lit-side-block {
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.lit-side-list {
  margin: 0;
  padding-left: 16px;
  font-size: 12.5px;
  line-height: 1.75;
  color: var(--gray-700);
}

.lit-side-list li + li {
  margin-top: 6px;
}

.lit-side-meta {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 11.5px;
  color: var(--gray-700);
}

.lit-side-meta div {
  display: flex;
  gap: 8px;
}

.lit-side-meta span {
  flex: 0 0 44px;
  font-family: var(--font-mono);
  font-size: 9.5px;
  letter-spacing: 0.08em;
  color: var(--gray-500);
  padding-top: 2px;
}

.lit-reader-body iframe {
  width: 100%;
  height: 100%;
  border: 0;
  background: var(--white);
}

/* —— 动画 —— */
@keyframes lit-rise {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes lit-pop {
  from {
    opacity: 0;
    transform: scale(0.985) translateY(8px);
  }
  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

/* —— 响应式 —— */
@media (max-width: 1080px) {
  .lit-hero {
    grid-template-columns: 1fr;
    align-items: start;
  }

  .lit-stats {
    max-width: 520px;
  }

  .lit-threads {
    grid-template-columns: 1fr;
  }

  .lit-thread-arrow {
    transform: rotate(90deg);
    padding: 2px 0;
  }
}

@media (max-width: 760px) {
  .lit-crumb {
    display: none;
  }

  .lit-top {
    gap: 10px;
  }

  .lit-counter,
  .lit-ghost {
    display: none;
  }

  .lit-controls {
    position: static;
  }

  .lit-tools {
    margin-left: 0;
    width: 100%;
  }

  .lit-search {
    flex: 1;
    min-width: 0;
  }

  .lit-grid {
    grid-template-columns: 1fr;
  }

  .lit-reader-body {
    grid-template-columns: 1fr;
  }

  .lit-reader-side {
    display: none;
  }

  .lit-reader-actions .lit-act:not(.lit-act-primary) {
    display: none;
  }

  .lit-reader-id small {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .lit-card,
  .lit-reader-panel {
    animation: none;
  }

  .lit-card,
  .lit-progress span {
    transition: none;
  }
}