:root {
  --paper: #f3efe5;
  --paper-deep: #e8e1d2;
  --ink: #1e2a25;
  --ink-soft: #55635b;
  --line: rgba(30, 42, 37, 0.14);
  --cinnabar: #a2352a;
  --cinnabar-dark: #7f251e;
  --moss: #476b57;
  --ochre: #ab7b38;
  --white: #fffdf7;
  --shadow: 0 22px 60px rgba(43, 48, 38, 0.09);
  --radius: 18px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 86px;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 9% 5%, rgba(162, 53, 42, 0.08), transparent 22rem),
    radial-gradient(circle at 90% 28%, rgba(71, 107, 87, 0.1), transparent 28rem),
    var(--paper);
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  line-height: 1.7;
}

button,
input,
select {
  font: inherit;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

a {
  color: inherit;
}

.page-noise {
  position: fixed;
  inset: 0;
  z-index: -1;
  opacity: 0.23;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(30, 42, 37, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(30, 42, 37, 0.025) 1px, transparent 1px);
  background-size: 26px 26px;
  mask-image: linear-gradient(to bottom, black, transparent 75%);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  width: 100%;
  margin: 0;
  padding: 12px max(32px, calc((100vw - 1480px) / 2));
  display: flex;
  align-items: center;
  gap: 20px;
  background: rgba(243, 239, 229, 0.94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(16px);
  box-shadow: 0 8px 24px rgba(43, 48, 38, 0.04);
}

.page-switcher {
  display: flex;
  gap: 3px;
  padding: 3px;
  margin-left: auto;
  background: rgba(255, 253, 247, 0.64);
  border: 1px solid var(--line);
  border-radius: 999px;
}

.page-switcher-link {
  display: grid;
  gap: 1px;
  min-width: 126px;
  padding: 7px 13px;
  color: var(--ink-soft);
  text-decoration: none;
  border-radius: 999px;
  transition: color 160ms ease, background 160ms ease;
}

.page-switcher-link + .page-switcher-link {
  border-left: 1px solid transparent;
}

.page-switcher-link span {
  font-family: "Songti SC", "STSong", serif;
  font-size: 15px;
  font-weight: 600;
  text-align: center;
}

.page-switcher-link small {
  overflow: hidden;
  font-size: 8px;
  letter-spacing: 0.02em;
  text-align: center;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.page-switcher-link:hover {
  color: var(--ink);
  background: var(--paper);
}

.page-switcher-link.is-active {
  color: var(--white);
  background: var(--moss);
}

.page-switcher-link.is-active small {
  color: rgba(255, 253, 247, 0.62);
}

.brand {
  display: flex;
  align-items: center;
  gap: 13px;
  text-decoration: none;
}

.brand-seal {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  color: var(--white);
  background: var(--cinnabar);
  font-family: "Songti SC", "STSong", serif;
  font-size: 24px;
  border-radius: 8px 8px 8px 2px;
  box-shadow: inset 0 0 0 2px rgba(255, 255, 255, 0.22);
}

.brand strong,
.brand small {
  display: block;
}

.brand strong {
  font-family: "Songti SC", "STSong", serif;
  font-size: 20px;
  letter-spacing: 0.08em;
}

.brand small {
  color: var(--ink-soft);
  font-size: 11px;
  letter-spacing: 0.12em;
}

.header-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--ink-soft);
  font-size: 13px;
}

.dot {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--cinnabar);
}

main,
.site-footer {
  width: min(1480px, calc(100% - 64px));
  margin-inline: auto;
}

.hero {
  min-height: 570px;
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(360px, 0.85fr);
  gap: 7vw;
  align-items: center;
  padding: 72px 4vw 64px;
}

.eyebrow {
  margin: 0 0 15px;
  color: var(--cinnabar);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.2em;
}

.hero h1 {
  margin: 0;
  font-family: "Songti SC", "STSong", serif;
  font-size: clamp(44px, 5.4vw, 78px);
  font-weight: 600;
  line-height: 1.18;
  letter-spacing: -0.04em;
}

.hero-lead {
  max-width: 650px;
  margin: 25px 0 0;
  color: var(--ink-soft);
  font-size: 18px;
}

.hero-actions {
  display: flex;
  gap: 14px;
  align-items: center;
  margin-top: 31px;
}

.primary-action,
.error-state button,
.empty-state button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 24px;
  border: 0;
  border-radius: 999px;
  color: var(--white);
  background: var(--cinnabar);
  text-decoration: none;
  cursor: pointer;
  transition: background 160ms ease, transform 160ms ease;
}

.primary-action:hover,
.error-state button:hover,
.empty-state button:hover {
  background: var(--cinnabar-dark);
  transform: translateY(-1px);
}

.text-action {
  padding: 10px 4px;
  color: var(--ink);
  background: transparent;
  border: 0;
  border-bottom: 1px solid currentColor;
  cursor: pointer;
}

.hero-insight {
  position: relative;
  min-height: 400px;
  padding: 42px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  overflow: hidden;
  color: var(--white);
  background:
    linear-gradient(155deg, rgba(30, 42, 37, 0.92), rgba(50, 75, 61, 0.97)),
    var(--ink);
  border-radius: 24px 6px 24px 24px;
  box-shadow: var(--shadow);
}

.hero-insight::before {
  content: "";
  position: absolute;
  inset: 18px;
  border: 1px solid rgba(255, 253, 247, 0.14);
  border-radius: 15px 2px 15px 15px;
}

.hero-character {
  position: absolute;
  top: -56px;
  right: 16px;
  font-family: "Songti SC", "STSong", serif;
  font-size: 270px;
  line-height: 1;
  color: rgba(255, 253, 247, 0.055);
}

.stat-grid {
  position: relative;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: rgba(255, 253, 247, 0.18);
  border: 1px solid rgba(255, 253, 247, 0.18);
}

.stat-grid > div {
  min-height: 105px;
  padding: 19px;
  background: rgba(30, 42, 37, 0.94);
}

.stat-grid strong,
.stat-grid span {
  display: block;
}

.stat-grid strong {
  font-family: "Songti SC", "STSong", serif;
  font-size: 38px;
  line-height: 1.15;
  font-weight: 500;
}

.stat-grid span {
  margin-top: 5px;
  color: rgba(255, 253, 247, 0.68);
  font-size: 12px;
  letter-spacing: 0.08em;
}

.hero-insight > p {
  position: relative;
  margin: 22px 0 0;
  color: rgba(255, 253, 247, 0.66);
  font-size: 12px;
}

.hero-insight b {
  color: var(--white);
  font-weight: 500;
}

.library {
  padding: 64px 0 80px;
  border-top: 1px solid var(--line);
}

.paper-workspace {
  padding: 63px 0 58px;
  border-top: 1px solid var(--line);
}

.mindmap-page {
  padding: 63px 0 80px;
  border-top: 1px solid var(--line);
}

.mindmap-shell {
  overflow: hidden;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 20px;
  box-shadow: var(--shadow);
}

.mindmap-toolbar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  background: var(--paper);
  border-bottom: 1px solid var(--line);
}

.mindmap-summary {
  flex: 1 1 auto;
  min-width: 190px;
  color: var(--ink-soft);
  font-size: 10px;
}

.mindmap-summary strong {
  display: block;
  margin-bottom: 2px;
  color: var(--ink);
  font-family: "Songti SC", "STSong", serif;
  font-size: 15px;
}

.mindmap-summary span + span::before {
  margin: 0 5px;
  content: "·";
}

.mindmap-search-wrap {
  position: relative;
  flex: 0 1 220px;
}

.mindmap-search-wrap > label {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
}

.mindmap-search-wrap input {
  width: 100%;
  min-height: 36px;
  padding: 7px 11px;
  color: var(--ink);
  font: inherit;
  font-size: 11px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
  outline: none;
}

.mindmap-search-wrap input:focus {
  border-color: var(--moss);
  box-shadow: 0 0 0 3px rgba(71, 107, 87, 0.1);
}

.mindmap-search-results {
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  left: 0;
  z-index: 20;
  max-height: 310px;
  overflow-y: auto;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 9px;
  box-shadow: var(--shadow);
}

.mindmap-search-results button {
  display: grid;
  gap: 2px;
  width: 100%;
  padding: 9px 11px;
  color: var(--ink);
  font: inherit;
  text-align: left;
  background: transparent;
  border: 0;
  border-bottom: 1px solid var(--line);
  cursor: pointer;
}

.mindmap-search-results button:last-child {
  border-bottom: 0;
}

.mindmap-search-results button:hover {
  background: var(--paper);
}

.mindmap-search-results strong {
  overflow: hidden;
  font-size: 11px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.mindmap-search-results span {
  color: var(--ink-soft);
  font-size: 9px;
}

.mindmap-search-empty {
  padding: 11px;
  color: var(--ink-soft);
  font-size: 10px;
}

.mindmap-controls {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 5px;
}

.mindmap-controls button {
  min-width: 32px;
  padding: 7px 9px;
  color: var(--ink);
  font: inherit;
  font-size: 10px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 7px;
  cursor: pointer;
}

.mindmap-controls button:hover {
  color: var(--white);
  background: var(--moss);
  border-color: var(--moss);
}

.mindmap-stage {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 310px;
  height: clamp(680px, calc(100dvh - 220px), 900px);
}

.mindmap-viewport {
  position: relative;
  min-width: 0;
  overflow: hidden;
  background-color: #f7f4eb;
  background-image:
    linear-gradient(rgba(30, 42, 37, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(30, 42, 37, 0.05) 1px, transparent 1px),
    radial-gradient(circle at 20% 10%, rgba(71, 107, 87, 0.09), transparent 20rem);
  background-size: 24px 24px, 24px 24px, auto;
  cursor: grab;
  outline: none;
  overscroll-behavior: contain;
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
}

.mindmap-viewport.is-dragging {
  cursor: grabbing;
}

.mindmap-viewport,
.mindmap-viewport * {
  -webkit-user-drag: none;
}

.mindmap-world {
  position: absolute;
  top: 0;
  left: 0;
  transform-origin: 0 0;
  will-change: transform;
}

.mindmap-connectors {
  position: absolute;
  top: 0;
  left: 0;
  overflow: visible;
  pointer-events: none;
}

.mindmap-connectors path {
  fill: none;
  stroke: rgba(71, 107, 87, 0.42);
  stroke-width: 1.8;
}

.mindmap-nodes {
  position: absolute;
  top: 0;
  left: 0;
}

.mindmap-node-wrap {
  position: absolute;
  width: 232px;
  transform: translateY(-50%);
}

.mindmap-node {
  position: relative;
  width: 100%;
  min-height: 48px;
  padding: 10px 28px 10px 12px;
  color: var(--ink);
  font: inherit;
  text-align: left;
  background: var(--white);
  border: 1px solid rgba(49, 67, 57, 0.22);
  border-left: 4px solid var(--moss);
  border-radius: 8px;
  box-shadow: 0 7px 18px rgba(43, 48, 38, 0.08);
  cursor: pointer;
}

.mindmap-viewport.is-dragging .mindmap-node {
  cursor: grabbing;
}

.mindmap-node:hover,
.mindmap-node.is-selected {
  border-color: var(--cinnabar);
  border-left-color: var(--cinnabar);
  box-shadow: 0 10px 24px rgba(139, 45, 38, 0.13);
}

.mindmap-node-title {
  display: -webkit-box;
  overflow: hidden;
  font-family: "Songti SC", "STSong", serif;
  font-size: 12px;
  font-weight: 600;
  line-height: 1.55;
  white-space: pre-line;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 4;
}

.mindmap-node-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-top: 6px;
}

.mindmap-node-meta span {
  padding: 1px 5px;
  color: var(--ink-soft);
  font-size: 8px;
  background: var(--paper);
  border-radius: 999px;
}

.mindmap-node-branch {
  position: absolute;
  right: 5px;
  bottom: 6px;
  width: 21px;
  height: 21px;
  display: grid;
  place-items: center;
  padding: 0;
  color: var(--white);
  font: inherit;
  font-size: 13px;
  background: var(--moss);
  border: 0;
  border-radius: 50%;
  cursor: pointer;
}

.mindmap-node.is-merged::after {
  position: absolute;
  top: 7px;
  right: 30px;
  color: var(--ochre);
  font-size: 8px;
  content: "合并";
}

.mindmap-node.is-root {
  color: var(--white);
  background: var(--ink);
  border-left-color: #e7b44b;
}

.mindmap-node.is-root .mindmap-node-title {
  font-size: 16px;
}

.mindmap-node.is-root .mindmap-node-meta span {
  color: rgba(255, 253, 247, 0.75);
  background: rgba(255, 253, 247, 0.1);
}

.mindmap-help {
  position: absolute;
  right: 14px;
  bottom: 11px;
  left: 14px;
  margin: 0;
  color: var(--ink-soft);
  font-size: 9px;
  text-align: center;
  pointer-events: none;
}

.mindmap-inspector {
  min-width: 0;
  padding: 20px;
  overflow-y: auto;
  background: var(--paper);
  border-left: 1px solid var(--line);
}

.mindmap-inspector-empty {
  display: grid;
  place-items: center;
  align-content: center;
  min-height: 100%;
  color: var(--ink-soft);
  text-align: center;
}

.mindmap-inspector-empty strong {
  color: var(--ink);
  font-family: "Songti SC", "STSong", serif;
  font-size: 18px;
}

.mindmap-inspector-empty p {
  font-size: 11px;
}

.mindmap-detail-kicker {
  margin: 0 0 8px;
  color: var(--cinnabar);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.1em;
}

.mindmap-inspector h3 {
  margin: 0;
  font-family: "Songti SC", "STSong", serif;
  font-size: 20px;
  line-height: 1.55;
  white-space: pre-line;
}

.mindmap-path {
  margin: 9px 0 0;
  color: var(--ink-soft);
  font-size: 9px;
  line-height: 1.7;
}

.mindmap-inspector-section {
  padding-top: 14px;
  margin-top: 14px;
  border-top: 1px solid var(--line);
}

.mindmap-inspector-section h4 {
  margin: 0 0 7px;
  font-size: 10px;
  letter-spacing: 0.08em;
}

.mindmap-inspector-section p,
.mindmap-inspector-section li {
  color: var(--ink-soft);
  font-size: 11px;
  line-height: 1.75;
}

.mindmap-inspector-section ul {
  padding-left: 17px;
  margin: 0;
}

.mindmap-detail-image {
  display: block;
  width: 100%;
  height: auto;
  margin-top: 0;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 7px;
  pointer-events: none;
}

.mindmap-detail-image-button {
  position: relative;
  display: block;
  width: 100%;
  padding: 0;
  margin-top: 9px;
  overflow: hidden;
  background: transparent;
  border: 0;
  border-radius: 7px;
  cursor: zoom-in;
}

.mindmap-detail-image-button span {
  position: absolute;
  right: 8px;
  bottom: 8px;
  padding: 4px 8px;
  color: var(--white);
  font-size: 9px;
  background: rgba(30, 42, 37, 0.78);
  border-radius: 999px;
}

.mindmap-detail-image-button:hover img {
  border-color: var(--cinnabar);
}

.mindmap-source-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 12px 16px;
  border-top: 1px solid var(--line);
  color: var(--ink-soft);
  font-size: 9px;
}

.mindmap-source-bar a {
  color: var(--cinnabar);
  text-decoration: none;
}

.mindmap-image-viewer {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: grid;
  place-items: center;
  padding: 24px;
  background: rgba(15, 21, 18, 0.86);
  backdrop-filter: blur(7px);
}

.mindmap-image-dialog {
  position: relative;
  display: grid;
  place-items: center;
  max-width: 96vw;
  max-height: 94dvh;
}

.mindmap-image-dialog img {
  display: block;
  max-width: 94vw;
  max-height: 86dvh;
  object-fit: contain;
  background: var(--white);
  border-radius: 8px;
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.34);
  user-select: none;
  -webkit-user-drag: none;
}

.mindmap-image-dialog p {
  max-width: min(720px, 90vw);
  margin: 10px 0 0;
  overflow: hidden;
  color: rgba(255, 253, 247, 0.74);
  font-size: 11px;
  text-align: center;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.mindmap-image-close {
  position: absolute;
  top: -44px;
  right: 0;
  width: 36px;
  height: 36px;
  color: var(--white);
  font-size: 24px;
  background: rgba(255, 253, 247, 0.12);
  border: 1px solid rgba(255, 253, 247, 0.24);
  border-radius: 50%;
  cursor: pointer;
}

.image-viewer-open {
  overflow: hidden;
}

.paper-workspace-meta {
  display: grid;
  gap: 12px;
  justify-items: end;
}

.paper-workspace-controls {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--ink-soft);
  font-size: 11px;
}

.paper-workspace-controls button {
  padding: 7px 12px;
  color: var(--white);
  font: inherit;
  background: var(--moss);
  border: 0;
  border-radius: 999px;
  cursor: pointer;
}

.paper-workspace-controls button:hover {
  background: var(--ink);
}

.paper-workspace-shell {
  overflow: clip;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 20px;
  box-shadow: var(--shadow);
}

.paper-year-tabs {
  display: flex;
  gap: 6px;
  padding: 16px 20px;
  overflow-x: auto;
  background: var(--ink);
}

.paper-year-button,
.paper-button {
  flex: 0 0 auto;
  padding: 9px 16px;
  color: rgba(255, 253, 247, 0.64);
  background: transparent;
  border: 1px solid transparent;
  border-radius: 999px;
  cursor: pointer;
}

.paper-year-button:hover,
.paper-year-button.is-active {
  color: var(--white);
  border-color: rgba(255, 253, 247, 0.28);
}

.paper-year-button.is-active {
  background: var(--cinnabar);
}

.paper-main {
  display: grid;
  grid-template-columns: minmax(230px, 0.28fr) minmax(0, 1fr);
  min-height: 410px;
  min-width: 0;
}

.paper-switcher {
  padding: 25px;
  min-width: 0;
  max-height: 100vh;
  overflow-y: auto;
  position: sticky;
  top: 0;
  align-self: start;
  background: var(--paper);
  border-right: 1px solid var(--line);
}

.paper-tabs {
  display: grid;
  gap: 7px;
}

.paper-button {
  width: 100%;
  color: var(--ink-soft);
  background: var(--white);
  border-color: var(--line);
  text-align: left;
}

.paper-button:hover,
.paper-button.is-active {
  color: var(--white);
  background: var(--moss);
  border-color: var(--moss);
}

.paper-summary {
  padding-top: 25px;
  margin-top: 25px;
  border-top: 1px solid var(--line);
}

.paper-summary h3 {
  margin: 0 0 9px;
  font-family: "Songti SC", "STSong", serif;
  font-size: 20px;
  line-height: 1.5;
}

.paper-summary p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 12px;
}

.paper-toc {
  padding-top: 22px;
  margin-top: 22px;
  min-width: 0;
  border-top: 1px solid var(--line);
}

.paper-toc-title {
  margin: 0 0 10px;
  color: var(--ink-soft);
  font-size: 11px;
  letter-spacing: 0.12em;
}

.paper-toc-answer-title {
  padding-top: 17px;
  margin-top: 18px;
  border-top: 1px solid var(--line);
}

.paper-toc-list {
  display: grid;
  gap: 6px;
  min-width: 0;
}

.paper-toc button {
  display: grid;
  gap: 3px;
  width: 100%;
  padding: 10px 11px;
  color: var(--ink);
  text-align: left;
  background: transparent;
  border: 0;
  border-left: 2px solid transparent;
  cursor: pointer;
}

.paper-toc button:hover,
.paper-toc button:focus-visible {
  color: var(--cinnabar);
  background: rgba(139, 45, 38, 0.06);
  border-left-color: var(--cinnabar);
}

.paper-toc button span {
  color: var(--ink-soft);
  font-size: 10px;
}

.paper-toc button strong {
  overflow: hidden;
  font-family: "Songti SC", "STSong", serif;
  font-size: 13px;
  font-weight: 600;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.paper-map {
  padding: 30px 32px 40px;
  min-width: 0;
}

.paper-map-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 20px;
  margin-bottom: 20px;
}

.paper-map-head h3 {
  margin: 0;
  font-family: "Songti SC", "STSong", serif;
  font-size: 25px;
  font-weight: 600;
}

.paper-map-head p {
  margin: 5px 0 0;
  color: var(--ink-soft);
  font-size: 12px;
}

.reading-scope-note {
  display: grid;
  grid-template-columns: 88px minmax(0, 1fr);
  gap: 16px;
  padding: 14px 17px;
  margin-bottom: 10px;
  background: rgba(139, 45, 38, 0.055);
  border-left: 3px solid var(--cinnabar);
}

.reading-scope-note.is-full-text {
  background: rgba(71, 107, 87, 0.07);
  border-left-color: var(--moss);
}

.reading-scope-note strong {
  color: var(--cinnabar);
  font-family: "Songti SC", "STSong", serif;
  font-size: 14px;
}

.reading-scope-note.is-full-text strong {
  color: var(--moss);
}

.reading-scope-note p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 12px;
  line-height: 1.7;
}

.paper-section-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 27px 0 12px;
  color: var(--ink-soft);
  font-size: 11px;
  letter-spacing: 0.08em;
  border-bottom: 1px solid var(--line);
}

.paper-section-label span:first-child {
  color: var(--cinnabar);
  font-weight: 700;
}

.paper-material-list {
  display: grid;
  min-width: 0;
}

.paper-material-section {
  width: 100%;
  min-width: 0;
  padding: 0;
  border-top: 1px solid var(--line);
  outline: none;
  scroll-margin-top: 20px;
}

.paper-material-section:first-child {
  border-top: 0;
}

.paper-material-section:focus-visible,
.paper-question-card:focus-visible {
  box-shadow: 0 0 0 3px rgba(139, 45, 38, 0.2);
}

.paper-material-heading {
  display: flex;
  align-items: flex-start;
  gap: 15px;
  width: 100%;
  min-width: 0;
  padding: 19px 0;
  color: var(--ink);
  text-align: left;
  background: transparent;
  border: 0;
  border-radius: 8px;
  cursor: pointer;
}

.paper-material-heading:hover {
  background: rgba(243, 239, 229, 0.46);
}

.paper-material-heading-copy {
  min-width: 0;
  flex: 1 1 auto;
}

.paper-material-number {
  flex: 0 0 auto;
  padding: 4px 8px;
  color: var(--cinnabar);
  font-family: "Songti SC", "STSong", serif;
  font-size: 13px;
  background: rgba(162, 53, 42, 0.07);
  border: 1px solid rgba(162, 53, 42, 0.18);
  border-radius: 4px;
}

.paper-material-heading h4 {
  margin: 0 0 2px;
  font-family: "Songti SC", "STSong", serif;
  font-size: 20px;
  font-weight: 600;
}

.paper-material-heading-copy > span {
  color: var(--ink-soft);
  font-size: 10px;
}

.material-annotation-count {
  display: inline-block;
  padding: 2px 7px;
  margin-left: 7px;
  color: var(--cinnabar) !important;
  background: rgba(162, 53, 42, 0.07);
  border-radius: 999px;
}

.paper-material-toggle-label {
  flex: 0 0 auto;
  padding-top: 4px;
  color: var(--cinnabar) !important;
  font-size: 10px !important;
}

.paper-material-toggle-label i {
  display: inline-block;
  font-style: normal;
  transition: transform 160ms ease;
}

.paper-material-section.is-open .paper-material-toggle-label i {
  transform: rotate(180deg);
}

.paper-material-preview {
  max-width: 790px;
  margin: -5px 0 20px 62px;
  overflow: hidden;
  color: var(--ink-soft);
  font-family: "Songti SC", "STSong", serif;
  font-size: 12px;
  line-height: 1.75;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.paper-material-section.is-open .paper-material-preview {
  display: none;
}

.paper-material-body {
  width: 100%;
  min-width: 0;
  padding-bottom: 31px;
}

.annotation-toolbar {
  position: sticky;
  top: 0;
  z-index: 8;
  display: flex;
  min-width: 0;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  padding: 11px 12px;
  margin-bottom: 16px;
  background: rgba(243, 239, 229, 0.96);
  border: 1px solid var(--line);
  border-radius: 9px;
  backdrop-filter: blur(10px);
}

.annotation-toolbar-label {
  display: grid;
  gap: 2px;
  flex: 0 0 auto;
}

.annotation-toolbar-label strong {
  color: var(--moss);
  font-size: 11px;
}

.annotation-toolbar-label span {
  color: var(--ink-soft);
  font-size: 9px;
}

.annotation-tools {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 5px;
}

.annotation-tools button {
  padding: 5px 8px;
  color: var(--ink-soft);
  font: inherit;
  font-size: 10px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 999px;
  cursor: pointer;
}

.annotation-tools button:hover,
.annotation-tools button.is-active {
  color: var(--white);
  background: var(--moss);
  border-color: var(--moss);
}

.annotation-tools button[data-annotation-action="clear"]:hover {
  background: var(--cinnabar);
  border-color: var(--cinnabar);
}

.material-annotation-area {
  position: relative;
  width: 100%;
  min-width: 0;
  min-height: 20px;
}

.material-annotation-canvas {
  position: absolute;
  inset: 0;
  z-index: 2;
  width: 100%;
  height: 100%;
  pointer-events: none;
  touch-action: none;
}

.material-annotation-area.is-annotating .material-annotation-canvas {
  pointer-events: auto;
  cursor: crosshair;
}

.material-annotation-area.is-annotating .paper-material-copy {
  user-select: none;
}

.annotation-note-layer {
  position: absolute;
  inset: 0;
  z-index: 3;
  pointer-events: none;
}

.canvas-note {
  position: absolute;
  width: min(260px, 74%);
  padding: 17px 11px 9px;
  pointer-events: auto;
  background: #fff3a9;
  border: 1px solid rgba(122, 91, 15, 0.2);
  border-radius: 3px 9px 3px 9px;
  box-shadow: 0 8px 22px rgba(43, 48, 38, 0.16);
  transform: translate(-8px, -8px) rotate(-0.5deg);
}

.canvas-note textarea {
  width: 100%;
  min-height: 58px;
  padding: 0;
  resize: vertical;
  color: #443714;
  font-family: "Kaiti SC", "STKaiti", "Songti SC", serif;
  font-size: 14px;
  line-height: 1.65;
  background: transparent;
  border: 0;
  outline: none;
}

.canvas-note-delete {
  position: absolute;
  top: 3px;
  right: 5px;
  padding: 0;
  color: rgba(68, 55, 20, 0.6);
  font: inherit;
  font-size: 16px;
  line-height: 1;
  background: transparent;
  border: 0;
  cursor: pointer;
}

.paper-material-copy {
  max-width: 790px;
  color: var(--ink);
  font-family: "Songti SC", "STSong", serif;
  font-size: 16px;
  line-height: 2.12;
  text-align: justify;
}

.paper-material-copy p {
  margin: 0 0 1em;
  text-indent: 2em;
}

.paper-material-copy p:last-child {
  margin-bottom: 0;
}

.paper-material-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  padding-top: 17px;
  margin-top: 18px;
  border-top: 1px dashed var(--line);
}

.paper-material-links > span,
.paper-question-materials > span {
  color: var(--ink-soft);
  font-size: 10px;
}

.paper-material-links button,
.paper-question-materials button {
  padding: 4px 8px;
  color: var(--moss);
  font: inherit;
  font-size: 10px;
  background: transparent;
  border: 1px solid rgba(71, 107, 87, 0.2);
  border-radius: 999px;
  cursor: pointer;
}

.paper-material-links button:hover,
.paper-question-materials button:hover {
  color: var(--white);
  background: var(--moss);
}

.paper-answers {
  padding-top: 50px;
  margin-top: 18px;
  border-top: 2px solid var(--ink);
}

.paper-answers-heading {
  display: grid;
  grid-template-columns: 90px minmax(0, 1fr);
  gap: 0 20px;
  align-items: end;
  padding-bottom: 23px;
}

.paper-answers-heading > span {
  color: var(--cinnabar);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.13em;
}

.paper-answers-heading h3 {
  margin: 0;
  font-family: "Songti SC", "STSong", serif;
  font-size: 30px;
  font-weight: 600;
}

.paper-answers-heading p {
  grid-column: 2;
  margin: 5px 0 0;
  color: var(--ink-soft);
  font-size: 12px;
}

.paper-question-list {
  display: grid;
  gap: 14px;
}

.paper-question-card {
  padding: 24px;
  background: var(--white);
  border: 1px solid var(--line);
  border-top: 3px solid var(--ochre);
  border-radius: 4px 4px 12px 12px;
  outline: none;
  scroll-margin-top: 18px;
}

.paper-question-heading {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  color: var(--cinnabar);
  font-size: 11px;
  font-weight: 600;
}

.paper-question-heading span + span::before {
  margin-right: 8px;
  color: var(--ink-soft);
  font-weight: 400;
  content: "·";
}

.paper-question-card h4 {
  margin: 13px 0 15px;
  font-family: "Songti SC", "STSong", serif;
  font-size: 18px;
  font-weight: 600;
  line-height: 1.8;
}

.paper-question-requirements {
  padding: 14px 16px;
  margin: 0 0 16px;
  color: var(--ink-soft);
  font-size: 13px;
  line-height: 1.8;
  background: rgba(243, 239, 229, 0.54);
  border-radius: 8px;
  list-style: none;
}

.paper-question-requirements li {
  position: relative;
  padding-left: 13px;
}

.paper-question-requirements li::before {
  position: absolute;
  left: 0;
  color: var(--ochre);
  content: "·";
}

.paper-question-requirements li + li {
  margin-top: 4px;
}

.paper-question-materials {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  padding-bottom: 16px;
  margin-bottom: 16px;
  border-bottom: 1px dashed var(--line);
}

.question-answer-panel {
  padding: 18px;
  margin: 0 0 16px;
  background: rgba(243, 239, 229, 0.54);
  border: 1px solid var(--line);
  border-radius: 10px;
}

.answer-panel-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
}

.answer-panel-heading > div {
  display: flex;
  align-items: baseline;
  gap: 9px;
}

.answer-panel-heading span {
  color: var(--cinnabar);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.answer-panel-heading strong {
  color: var(--ink-soft);
  font-size: 10px;
  font-weight: 500;
}

.answer-panel-heading small {
  color: var(--ink-soft);
  font-size: 9px;
  text-align: right;
}

.answer-input {
  width: 100%;
  min-height: 210px;
  padding: 15px 16px;
  resize: vertical;
  color: var(--ink);
  font-family: "Songti SC", "STSong", serif;
  font-size: 15px;
  line-height: 1.9;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
  outline: none;
}

.answer-input:focus {
  border-color: var(--moss);
  box-shadow: 0 0 0 3px rgba(71, 107, 87, 0.1);
}

.answer-panel-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 7px;
  margin-top: 10px;
}

.answer-panel-actions > span {
  margin-right: auto;
  color: var(--ink-soft);
  font-size: 9px;
}

.answer-panel-actions button {
  padding: 7px 12px;
  color: var(--white);
  font: inherit;
  font-size: 10px;
  background: var(--moss);
  border: 1px solid var(--moss);
  border-radius: 999px;
  cursor: pointer;
}

.answer-panel-actions button:disabled {
  opacity: 0.56;
  cursor: wait;
}

.answer-panel-actions .answer-clear {
  color: var(--ink-soft);
  background: transparent;
  border-color: var(--line);
}

.question-answer-panel.is-reviewing {
  border-color: rgba(71, 107, 87, 0.48);
}

.ai-review-output:empty {
  display: none;
}

.ai-review-result {
  padding-top: 18px;
  margin-top: 18px;
  border-top: 1px solid var(--line);
}

.ai-review-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
  padding: 16px 17px;
  color: var(--white);
  background:
    linear-gradient(145deg, rgba(30, 42, 37, 0.98), rgba(64, 91, 75, 0.96));
  border-radius: 10px;
}

.ai-review-header span,
.ai-review-header small {
  display: block;
}

.ai-review-header span {
  font-family: "Songti SC", "STSong", serif;
  font-size: 16px;
  font-weight: 600;
}

.ai-review-header small {
  margin-top: 3px;
  color: rgba(255, 253, 247, 0.6);
  font-size: 9px;
}

.ai-review-header > strong {
  flex: 0 0 auto;
  color: #f0c96a;
  font-family: "Songti SC", "STSong", serif;
  font-size: 20px;
}

.ai-review-summary {
  padding: 15px 0 5px;
  color: var(--ink);
  font-size: 13px;
  line-height: 1.85;
}

.review-dimensions {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
  margin-top: 12px;
}

.review-dimension {
  padding: 11px 12px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.review-dimension > div:first-child {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  font-size: 10px;
}

.review-dimension > div:first-child span {
  color: var(--cinnabar);
}

.review-score-track {
  height: 4px;
  margin: 7px 0;
  overflow: hidden;
  background: var(--paper-deep);
  border-radius: 999px;
}

.review-score-track i {
  display: block;
  height: 100%;
  background: var(--moss);
  border-radius: inherit;
}

.review-dimension p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 9px;
  line-height: 1.6;
}

.review-columns {
  display: grid;
  gap: 8px;
  margin-top: 12px;
}

.review-columns section {
  padding: 12px 14px;
  background: rgba(255, 253, 247, 0.72);
  border-left: 2px solid var(--ochre);
  border-radius: 0 7px 7px 0;
}

.review-columns h5,
.review-feedback-section h5 {
  margin: 0 0 7px;
  color: var(--ink);
  font-size: 11px;
}

.review-columns ul,
.review-evidence {
  padding-left: 17px;
  margin: 0;
  color: var(--ink-soft);
  font-size: 11px;
  line-height: 1.75;
}

.review-feedback-section {
  margin-top: 14px;
}

.paragraph-feedback-list {
  display: grid;
  gap: 7px;
}

.paragraph-feedback-list article {
  padding: 10px 12px;
  background: rgba(255, 253, 247, 0.72);
  border: 1px solid var(--line);
  border-radius: 7px;
}

.paragraph-feedback-list span {
  color: var(--cinnabar);
  font-size: 9px;
  font-weight: 700;
}

.paragraph-feedback-list p {
  margin: 3px 0 0;
  color: var(--ink-soft);
  font-size: 11px;
  line-height: 1.7;
}

.review-outline {
  padding-left: 20px;
  margin: 0;
  color: var(--ink-soft);
  font-size: 11px;
  line-height: 1.8;
}

.ai-review-result > footer {
  padding-top: 10px;
  margin-top: 16px;
  color: var(--ink-soft);
  font-size: 9px;
  border-top: 1px dashed var(--line);
}

.reading-question-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.reading-question-actions button,
.reading-question-actions a {
  padding: 8px 12px;
  color: var(--moss);
  font: inherit;
  font-size: 11px;
  text-decoration: none;
  background: var(--white);
  border: 1px solid rgba(49, 67, 57, 0.2);
  border-radius: 999px;
  cursor: pointer;
}

.reading-question-actions button:hover,
.reading-question-actions a:hover {
  color: var(--white);
  background: var(--moss);
  border-color: var(--moss);
}

.section-heading {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 24px;
  margin-bottom: 28px;
}

.section-heading h2,
.source-intro h2 {
  margin: 0;
  font-family: "Songti SC", "STSong", serif;
  font-size: clamp(34px, 4vw, 52px);
  font-weight: 500;
}

.section-note {
  max-width: 420px;
  margin: 0;
  color: var(--ink-soft);
  font-size: 14px;
  text-align: right;
}

.view-tabs {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 2px;
  border-bottom: 1px solid var(--line);
}

.view-tab {
  position: relative;
  flex: 0 0 auto;
  padding: 15px 18px 17px;
  color: var(--ink-soft);
  background: transparent;
  border: 0;
  cursor: pointer;
}

.view-tab::after {
  content: "";
  position: absolute;
  right: 18px;
  bottom: -1px;
  left: 18px;
  height: 2px;
  background: transparent;
}

.view-tab.is-active {
  color: var(--ink);
  font-weight: 650;
}

.view-tab.is-active::after {
  background: var(--cinnabar);
}

.view-tab span {
  margin-left: 5px;
  color: var(--cinnabar);
  font-size: 11px;
}

.search-panel {
  display: grid;
  grid-template-columns: minmax(240px, 1.7fr) repeat(4, minmax(110px, 0.65fr)) auto;
  gap: 12px;
  padding: 20px;
  margin-top: 22px;
  background: rgba(255, 253, 247, 0.72);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 12px 35px rgba(43, 48, 38, 0.045);
}

.search-panel label {
  min-width: 0;
}

.search-panel label > span {
  display: block;
  margin-bottom: 6px;
  color: var(--ink-soft);
  font-size: 11px;
  letter-spacing: 0.08em;
}

.search-panel input,
.search-panel select {
  width: 100%;
  height: 43px;
  padding: 0 12px;
  color: var(--ink);
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
  outline: none;
}

.search-panel input:focus,
.search-panel select:focus {
  border-color: var(--moss);
  box-shadow: 0 0 0 3px rgba(71, 107, 87, 0.12);
}

.reset-button,
.empty-state button,
.error-state button {
  align-self: end;
  height: 43px;
  padding: 0 16px;
  color: var(--ink);
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 8px;
  cursor: pointer;
}

.results-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  margin: 18px 2px 12px;
  color: var(--ink-soft);
  font-size: 12px;
}

.results-bar p {
  margin: 0;
}

.results-legend {
  display: flex;
  gap: 14px;
}

.results-legend span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.legend-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
}

.legend-dot.verified {
  background: var(--moss);
}

.legend-dot.analysis {
  background: var(--ochre);
}

.app-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(360px, 0.9fr);
  gap: 18px;
  align-items: start;
}

.result-panel {
  min-width: 0;
}

.result-list {
  display: grid;
  gap: 10px;
}

.result-card {
  width: 100%;
  padding: 22px 23px;
  text-align: left;
  color: var(--ink);
  background: rgba(255, 253, 247, 0.68);
  border: 1px solid var(--line);
  border-radius: 13px;
  cursor: pointer;
  transition: transform 160ms ease, border-color 160ms ease, background 160ms ease;
}

.result-card:hover {
  transform: translateY(-2px);
  border-color: rgba(162, 53, 42, 0.35);
}

.result-card.is-selected {
  background: var(--white);
  border-color: var(--cinnabar);
  box-shadow: 0 15px 40px rgba(43, 48, 38, 0.08);
}

.card-meta,
.detail-meta,
.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  align-items: center;
}

.card-meta,
.detail-meta {
  color: var(--ink-soft);
  font-size: 11px;
}

.meta-strong {
  color: var(--cinnabar);
  font-weight: 700;
}

.type-pill,
.tag {
  display: inline-flex;
  align-items: center;
  min-height: 23px;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 11px;
}

.type-pill {
  color: var(--moss);
  background: rgba(71, 107, 87, 0.1);
}

.tag {
  color: var(--ink-soft);
  background: var(--paper-deep);
}

.result-card h3 {
  margin: 13px 0 9px;
  font-family: "Songti SC", "STSong", serif;
  font-size: 20px;
  line-height: 1.5;
  font-weight: 600;
}

.result-card p {
  display: -webkit-box;
  margin: 0 0 14px;
  overflow: hidden;
  color: var(--ink-soft);
  font-size: 13px;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}

.detail-panel {
  position: sticky;
  top: 18px;
  min-height: 420px;
  max-height: calc(100vh - 36px);
  padding: 30px;
  overflow-y: auto;
  overscroll-behavior: contain;
  scrollbar-gutter: stable;
  scrollbar-width: thin;
  scrollbar-color: rgba(162, 53, 42, 0.42) transparent;
  background: var(--white);
  border: 1px solid var(--line);
  border-top: 4px solid var(--cinnabar);
  border-radius: 4px 18px 18px 18px;
  box-shadow: var(--shadow);
}

.detail-panel::-webkit-scrollbar {
  width: 8px;
}

.detail-panel::-webkit-scrollbar-track {
  background: transparent;
}

.detail-panel::-webkit-scrollbar-thumb {
  background: rgba(162, 53, 42, 0.28);
  border: 2px solid var(--white);
  border-radius: 999px;
}

.detail-panel::-webkit-scrollbar-thumb:hover {
  background: rgba(162, 53, 42, 0.52);
}

.detail-kicker {
  margin: 0 0 11px;
  color: var(--cinnabar);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
}

.detail-panel h2 {
  margin: 0 0 13px;
  font-family: "Songti SC", "STSong", serif;
  font-size: 28px;
  line-height: 1.45;
  font-weight: 600;
}

.prompt-block {
  margin: 22px 0;
  padding: 18px 19px;
  background: var(--paper);
  border-left: 3px solid var(--cinnabar);
  border-radius: 0 10px 10px 0;
}

.prompt-block p {
  margin: 0;
  font-family: "Songti SC", "STSong", serif;
  font-size: 17px;
  line-height: 1.8;
}

.detail-section {
  padding-top: 19px;
  margin-top: 19px;
  border-top: 1px solid var(--line);
}

.detail-section h3,
.source-list-wrap h3 {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: 0.12em;
}

.detail-section p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 14px;
}

.linked-list {
  display: grid;
  gap: 9px;
}

.linked-item {
  display: block;
  width: 100%;
  padding: 13px 14px;
  color: var(--ink);
  background: rgba(243, 239, 229, 0.62);
  border: 1px solid transparent;
  border-radius: 9px;
  font: inherit;
  text-align: left;
  text-decoration: none;
  cursor: pointer;
  transition: border-color 160ms ease;
}

.linked-item:hover {
  border-color: var(--moss);
}

.linked-item strong {
  display: block;
  font-family: "Songti SC", "STSong", serif;
  font-size: 15px;
  font-weight: 600;
}

.linked-item span {
  display: block;
  margin-top: 4px;
  color: var(--ink-soft);
  font-size: 11px;
}

.quote {
  font-family: "Songti SC", "STSong", serif;
  font-size: 18px !important;
  line-height: 1.8;
}

.verification-note {
  padding: 11px 13px;
  margin-top: 15px;
  color: #775825 !important;
  background: rgba(171, 123, 56, 0.1);
  border-radius: 8px;
  font-size: 12px !important;
}

.method-steps {
  display: grid;
  gap: 10px;
}

.method-step {
  display: grid;
  grid-template-columns: 28px 1fr;
  gap: 10px;
}

.method-step > span {
  width: 26px;
  height: 26px;
  display: grid;
  place-items: center;
  color: var(--white);
  background: var(--moss);
  border-radius: 50%;
  font-size: 11px;
}

.method-step strong {
  display: block;
  font-size: 13px;
}

.method-step p {
  margin-top: 2px;
  font-size: 13px;
}

.research-overview {
  border-top: 0;
}

.zhejiang-focus-card {
  padding: 17px 18px;
  margin-top: 19px;
  background: rgba(71, 107, 87, 0.08);
  border: 1px solid rgba(71, 107, 87, 0.16);
  border-radius: 11px;
}

.zhejiang-focus-card > span,
.answer-formula-card > span {
  display: block;
  margin-bottom: 7px;
  color: var(--moss);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.13em;
}

.zhejiang-focus-card p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 13px;
  line-height: 1.8;
}

.answer-formula-card {
  padding: 17px 18px;
  margin-top: 10px;
  color: var(--white);
  background:
    linear-gradient(145deg, rgba(30, 42, 37, 0.98), rgba(62, 91, 74, 0.96));
  border-radius: 11px;
}

.answer-formula-card > span {
  color: rgba(255, 253, 247, 0.58);
}

.answer-formula-card strong {
  display: block;
  font-family: "Songti SC", "STSong", serif;
  font-size: 15px;
  line-height: 1.7;
}

.answer-formula-card p {
  margin: 9px 0 0;
  color: rgba(255, 253, 247, 0.7);
  font-size: 11px;
  line-height: 1.7;
}

.team-insight-list,
.quality-upgrade-list,
.research-source-list {
  display: grid;
  gap: 9px;
}

.team-insight {
  padding: 14px 15px;
  background: rgba(243, 239, 229, 0.58);
  border-radius: 9px;
}

.team-insight > span {
  display: inline-block;
  padding: 2px 7px;
  color: var(--cinnabar);
  font-size: 10px;
  font-weight: 700;
  background: rgba(162, 53, 42, 0.07);
  border-radius: 999px;
}

.team-insight p {
  margin-top: 7px;
  color: var(--ink);
  font-size: 12px;
  line-height: 1.75;
}

.quality-upgrade {
  padding: 14px 15px;
  border: 1px solid var(--line);
  border-radius: 9px;
}

.quality-upgrade p {
  position: relative;
  padding-left: 22px;
  font-size: 12px;
  line-height: 1.7;
}

.quality-upgrade p::before {
  position: absolute;
  left: 0;
  width: 17px;
  font-weight: 700;
  text-align: center;
}

.quality-weak {
  color: #8a665c !important;
}

.quality-weak::before {
  color: var(--cinnabar);
  content: "－";
}

.quality-strong {
  margin-top: 6px !important;
  color: var(--ink) !important;
}

.quality-strong::before {
  color: var(--moss);
  content: "＋";
}

.quality-upgrade > span {
  display: block;
  padding-top: 8px;
  margin-top: 9px;
  color: var(--ink-soft);
  font-size: 10px;
  line-height: 1.6;
  border-top: 1px dashed var(--line);
}

.answer-checklist {
  display: grid;
  gap: 7px;
  padding: 0;
  margin: 0;
  list-style: none;
}

.answer-checklist li {
  position: relative;
  padding-left: 22px;
  color: var(--ink-soft);
  font-size: 12px;
  line-height: 1.7;
}

.answer-checklist li::before {
  position: absolute;
  left: 0;
  width: 15px;
  height: 15px;
  display: grid;
  place-items: center;
  color: var(--white);
  background: var(--moss);
  border-radius: 4px;
  font-size: 9px;
  content: "✓";
}

.research-source {
  display: block;
  padding: 13px 14px;
  color: var(--ink);
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 9px;
  text-decoration: none;
}

.research-source:hover {
  border-color: var(--cinnabar);
}

.research-source > div {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.research-source > div span {
  padding: 2px 6px;
  color: var(--cinnabar);
  font-size: 9px;
  background: rgba(162, 53, 42, 0.07);
  border-radius: 999px;
}

.research-source strong {
  display: block;
  margin-top: 7px;
  font-family: "Songti SC", "STSong", serif;
  font-size: 14px;
  line-height: 1.55;
}

.research-source p {
  margin-top: 5px;
  color: var(--ink-soft);
  font-size: 11px;
  line-height: 1.65;
}

.research-source small {
  display: block;
  margin-top: 7px;
  color: var(--ochre);
  font-size: 9px;
  line-height: 1.55;
}

.material-drawer-backdrop {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  justify-content: flex-end;
  background: rgba(18, 26, 22, 0.52);
  backdrop-filter: blur(4px);
}

.material-drawer {
  width: min(620px, 92vw);
  height: 100dvh;
  display: flex;
  flex-direction: column;
  background: var(--white);
  border-left: 1px solid rgba(255, 253, 247, 0.25);
  box-shadow: -24px 0 70px rgba(20, 27, 23, 0.22);
  animation: drawer-in 220ms ease-out;
}

@keyframes drawer-in {
  from { transform: translateX(28px); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

.material-drawer-topbar {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 26px 0;
}

.material-drawer-topbar .detail-kicker {
  margin: 0;
}

.drawer-close {
  width: 38px;
  height: 38px;
  color: var(--ink);
  background: var(--paper);
  border: 0;
  border-radius: 50%;
  font-size: 24px;
  line-height: 1;
  cursor: pointer;
}

.material-drawer-content {
  flex: 1 1 auto;
  padding: 18px 26px 30px;
  overflow-y: auto;
  overscroll-behavior: contain;
}

.material-drawer-content h2 {
  margin: 0 0 9px;
  font-family: "Songti SC", "STSong", serif;
  font-size: 27px;
  line-height: 1.45;
}

.drawer-paper-label {
  color: var(--cinnabar);
  font-size: 12px;
  font-weight: 650;
}

.drawer-question {
  padding: 17px 18px;
  margin: 18px 0;
  background: var(--paper);
  border-left: 3px solid var(--cinnabar);
  border-radius: 0 9px 9px 0;
  font-family: "Songti SC", "STSong", serif;
  font-size: 17px;
  line-height: 1.8;
}

.drawer-section {
  padding-top: 18px;
  margin-top: 18px;
  border-top: 1px solid var(--line);
}

.drawer-section h3 {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: 0.12em;
}

.drawer-section > p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 13px;
  line-height: 1.85;
}

.drawer-material {
  padding: 15px;
  margin-bottom: 10px;
  background: rgba(243, 239, 229, 0.74);
  border: 1px solid var(--line);
  border-radius: 10px;
}

.drawer-material strong {
  display: block;
  margin-bottom: 7px;
  font-size: 13px;
}

.drawer-material p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 13px;
  line-height: 1.8;
}

.drawer-material-note {
  display: inline-block;
  margin-top: 9px;
  color: var(--ochre);
  font-size: 11px;
}

.drawer-guide-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.drawer-guide-link,
.drawer-reading-link {
  display: block;
  width: 100%;
  padding: 12px;
  color: var(--ink);
  text-align: left;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 8px;
  text-decoration: none;
  cursor: pointer;
}

.drawer-guide-link:hover,
.drawer-reading-link:hover {
  border-color: var(--moss);
}

.drawer-guide-link strong,
.drawer-reading-link strong {
  display: block;
  font-size: 12px;
}

.drawer-guide-link span,
.drawer-reading-link span {
  display: block;
  margin-top: 4px;
  color: var(--ink-soft);
  font-size: 11px;
}

.material-drawer-footer {
  flex: 0 0 auto;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 10px;
  padding: 14px 22px;
  background: var(--paper);
  border-top: 1px solid var(--line);
}

.material-drawer-footer button {
  min-height: 38px;
  color: var(--ink);
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
  cursor: pointer;
}

.material-drawer-footer button:disabled {
  opacity: 0.36;
  cursor: default;
}

.material-drawer-footer span {
  color: var(--ink-soft);
  font-size: 11px;
}

.drawer-open {
  overflow: hidden;
}

.guide-card-score {
  color: var(--cinnabar);
  font-size: 13px;
}

.loading-state,
.error-state,
.empty-state {
  min-height: 330px;
  display: grid;
  place-items: center;
  align-content: center;
  gap: 12px;
  color: var(--ink-soft);
  text-align: center;
  background: rgba(255, 253, 247, 0.45);
  border: 1px dashed var(--line);
  border-radius: var(--radius);
}

.loading-mark {
  width: 60px;
  height: 60px;
  display: grid;
  place-items: center;
  color: var(--white);
  background: var(--cinnabar);
  border-radius: 10px 10px 10px 2px;
  font-family: "Songti SC", "STSong", serif;
  font-size: 30px;
  animation: breathe 1.6s ease-in-out infinite;
}

@keyframes breathe {
  50% { transform: scale(0.94); opacity: 0.72; }
}

.error-state h3,
.empty-state strong {
  margin: 0;
  color: var(--ink);
  font-family: "Songti SC", "STSong", serif;
  font-size: 24px;
}

.error-state p,
.empty-state p {
  max-width: 440px;
  margin: 0;
}

.sources-view {
  padding: 30px 0;
}

.source-intro {
  max-width: 880px;
}

.source-intro > p:last-child {
  color: var(--ink-soft);
  font-size: 16px;
}

.source-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-top: 35px;
}

.source-grid article {
  padding: 24px;
  background: rgba(255, 253, 247, 0.68);
  border: 1px solid var(--line);
  border-radius: 12px;
}

.source-grid article > span {
  color: var(--cinnabar);
  font-family: "Songti SC", "STSong", serif;
  font-size: 28px;
}

.source-grid h3 {
  margin: 11px 0 8px;
}

.source-grid p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 13px;
}

.source-list-wrap {
  margin-top: 38px;
}

.source-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
}

.source-row {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 14px 16px;
  color: var(--ink);
  background: rgba(255, 253, 247, 0.55);
  border-bottom: 1px solid var(--line);
  text-decoration: none;
}

.source-row span:first-child {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.source-row span:last-child {
  flex: 0 0 auto;
  color: var(--cinnabar);
  font-size: 12px;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 25px;
  padding: 28px 0 36px;
  color: var(--ink-soft);
  border-top: 1px solid var(--line);
  font-size: 11px;
}

.site-footer p {
  margin: 0;
}

[hidden] {
  display: none !important;
}

@media (max-width: 1120px) {
  .hero {
    gap: 4vw;
    padding-inline: 0;
  }

  .search-panel {
    grid-template-columns: minmax(220px, 1.5fr) repeat(2, minmax(120px, 0.7fr));
  }

  .search-panel label:nth-of-type(4),
  .search-panel label:nth-of-type(5) {
    grid-column: span 1;
  }

  .app-grid {
    grid-template-columns: minmax(0, 1fr) minmax(330px, 0.8fr);
  }

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

@media (max-width: 820px) {
  main,
  .site-footer {
    width: min(100% - 32px, 680px);
  }

  .site-header {
    width: 100%;
    gap: 9px;
    padding: 9px 16px;
  }

  .page-switcher {
    gap: 2px;
    padding: 2px;
  }

  .page-switcher-link {
    min-width: 0;
    padding: 7px 9px;
  }

  .page-switcher-link span {
    font-size: 14px;
  }

  .page-switcher-link small {
    display: none;
  }

  .header-meta {
    display: none;
  }

  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
    padding: 54px 0 42px;
  }

  .hero h1 {
    font-size: clamp(42px, 11vw, 62px);
  }

  .hero-insight {
    min-height: 300px;
  }

  .section-heading {
    align-items: flex-start;
    flex-direction: column;
  }

  .section-note {
    text-align: left;
  }

  .paper-workspace-meta {
    justify-items: start;
  }

  .mindmap-toolbar {
    align-items: stretch;
    flex-wrap: wrap;
  }

  .mindmap-summary {
    flex-basis: 100%;
  }

  .mindmap-search-wrap {
    flex: 1 1 240px;
  }

  .mindmap-controls {
    justify-content: flex-start;
  }

  .mindmap-stage {
    grid-template-columns: 1fr;
    height: auto;
  }

  .mindmap-viewport {
    height: 600px;
  }

  .mindmap-inspector {
    max-height: 460px;
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .paper-workspace-controls {
    flex-wrap: wrap;
  }

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

  .search-field {
    grid-column: 1 / -1;
  }

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

  .paper-main {
    grid-template-columns: 1fr;
  }

  .paper-switcher {
    position: static;
    max-height: none;
    overflow: visible;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .paper-tabs {
    grid-template-columns: repeat(3, 1fr);
  }

  .paper-button {
    text-align: center;
  }

  .paper-summary {
    padding-top: 17px;
    margin-top: 17px;
  }

  .paper-toc {
    padding-top: 17px;
    margin-top: 17px;
  }

  .paper-toc-list {
    display: flex;
    gap: 7px;
    padding-bottom: 2px;
    overflow-x: auto;
  }

  .paper-toc button {
    flex: 0 0 190px;
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: 8px;
  }

  .detail-panel {
    position: static;
    order: -1;
    max-height: none;
    overflow: visible;
    scrollbar-gutter: auto;
  }

  .results-legend {
    display: none;
  }

  .source-list {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 520px) {
  .site-header {
    gap: 6px;
    padding: 8px 12px;
  }

  .brand {
    gap: 7px;
  }

  .brand-seal {
    width: 36px;
    height: 36px;
    font-size: 20px;
  }

  .brand strong {
    font-size: 18px;
    letter-spacing: 0.04em;
  }

  .brand small {
    display: none;
  }

  .page-switcher-link {
    padding: 6px 7px;
  }

  .page-switcher-link span {
    font-size: 13px;
  }

  .hero {
    padding-top: 44px;
  }

  .hero-lead {
    font-size: 16px;
  }

  .hero-actions {
    align-items: flex-start;
    flex-direction: column;
  }

  .hero-insight {
    min-height: 270px;
    padding: 28px;
  }

  .stat-grid > div {
    min-height: 88px;
    padding: 14px;
  }

  .stat-grid strong {
    font-size: 30px;
  }

  .library {
    padding-top: 46px;
  }

  .paper-workspace {
    padding-top: 46px;
  }

  .mindmap-page {
    padding-top: 46px;
  }

  .mindmap-toolbar {
    padding: 12px;
  }

  .mindmap-search-wrap {
    flex-basis: 100%;
  }

  .mindmap-viewport {
    height: 68vh;
    min-height: 460px;
  }

  .mindmap-source-bar {
    align-items: flex-start;
    flex-direction: column;
    gap: 7px;
  }

  .paper-year-tabs {
    padding: 12px 14px;
  }

  .paper-switcher,
  .paper-map {
    padding: 18px;
  }

  .paper-map-head {
    flex-direction: column;
    gap: 8px;
  }

  .reading-scope-note {
    grid-template-columns: 1fr;
    gap: 5px;
  }

  .paper-material-section {
    padding: 0;
    scroll-margin-top: 12px;
  }

  .paper-material-heading {
    padding: 16px 0;
  }

  .paper-material-preview {
    margin-left: 0;
  }

  .annotation-toolbar {
    align-items: stretch;
    flex-direction: column;
  }

  .annotation-tools {
    justify-content: flex-start;
  }

  .canvas-note {
    width: min(250px, 82%);
  }

  .canvas-note textarea {
    font-size: 16px;
  }

  .paper-material-copy {
    font-size: 16px;
    line-height: 1.98;
    text-align: left;
  }

  .paper-section-label,
  .paper-answers-heading {
    grid-template-columns: 1fr;
  }

  .paper-section-label {
    align-items: flex-start;
    flex-direction: column;
    gap: 4px;
  }

  .paper-answers {
    padding-top: 36px;
  }

  .paper-answers-heading {
    gap: 5px;
  }

  .paper-answers-heading p {
    grid-column: auto;
  }

  .paper-question-card {
    padding: 19px;
  }

  .paper-question-card h4 {
    font-size: 17px;
    line-height: 1.75;
  }

  .question-answer-panel {
    padding: 14px;
  }

  .answer-panel-heading {
    align-items: flex-start;
    flex-direction: column;
    gap: 5px;
  }

  .answer-panel-heading small {
    text-align: left;
  }

  .answer-input {
    min-height: 190px;
    font-size: 16px;
  }

  .answer-panel-actions {
    flex-wrap: wrap;
  }

  .answer-panel-actions > span {
    flex: 1 0 100%;
  }

  .review-dimensions {
    grid-template-columns: 1fr;
  }

  .ai-review-header {
    align-items: flex-start;
    flex-direction: column;
    gap: 8px;
  }

  .reading-question-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .reading-question-actions button,
  .reading-question-actions a {
    text-align: center;
  }

  .material-drawer-backdrop {
    align-items: flex-end;
  }

  .material-drawer {
    width: 100%;
    height: 100dvh;
    border-left: 0;
    border-radius: 0;
  }

  .material-drawer-topbar {
    padding: 14px 18px 0;
  }

  .material-drawer-content {
    padding: 13px 18px 22px;
  }

  .material-drawer-content h2 {
    font-size: 23px;
  }

  .drawer-guide-grid {
    grid-template-columns: 1fr;
  }

  .material-drawer-footer {
    padding: 11px 14px;
  }

  .search-panel {
    grid-template-columns: 1fr;
    padding: 15px;
  }

  .search-field {
    grid-column: auto;
  }

  .detail-panel {
    padding: 22px 19px;
    border-radius: 4px 13px 13px 13px;
  }

  .detail-panel h2 {
    font-size: 23px;
  }

  .result-card {
    padding: 18px;
  }

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

  .site-footer {
    flex-direction: column;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}