:root {
  color-scheme: light;
  --paper: #f4f1ea;
  --ink: #161b22;
  --muted: #667085;
  --line: #ded8cc;
  --teal: #24706a;
  --copper: #bf6543;
  --gold: #c8a44d;
  --white: #fffdf8;
  --panel: #15201f;
  --soft: #ece7dc;
  --shadow: 0 18px 50px rgba(22, 27, 34, 0.1);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--paper);
  color: var(--ink);
}

.app-shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: minmax(300px, 360px) minmax(0, 1fr);
}

.library-panel {
  position: sticky;
  top: 0;
  height: 100vh;
  overflow: auto;
  background: var(--panel);
  color: #fffdf8;
  border-right: 1px solid rgba(255,255,255,0.1);
}

.brand-block {
  padding: 30px 28px 22px;
  border-bottom: 1px solid rgba(255,255,255,0.12);
}
.brand-kicker {
  color: var(--gold);
  font-size: 13px;
  letter-spacing: 0;
}
.brand-block h1 {
  margin: 10px 0 6px;
  font-size: 32px;
  line-height: 1.15;
}
.brand-block p {
  margin: 0;
  color: rgba(255,255,255,0.72);
  font-size: 14px;
}

.search-area {
  padding: 18px 22px 14px;
  display: grid;
  gap: 10px;
  background: rgba(255,255,255,0.04);
}
.search-area input,
.search-area select {
  width: 100%;
  height: 42px;
  border: 1px solid rgba(255,255,255,0.16);
  background: rgba(255,255,255,0.08);
  color: #fffdf8;
  border-radius: 8px;
  padding: 0 12px;
  font-size: 14px;
}
.search-area option { color: var(--ink); }

.stats-strip {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: rgba(255,255,255,0.12);
}
.stat {
  min-width: 0;
  padding: 12px 8px;
  background: rgba(255,255,255,0.06);
  text-align: center;
}
.stat strong { display: block; font-size: 20px; line-height: 1.1; color: #fffdf8; }
.stat span { display: block; margin-top: 3px; font-size: 12px; color: rgba(255,255,255,0.66); white-space: nowrap; }

.toc-list { padding: 12px 0 28px; }
.chapter-title {
  margin: 18px 18px 8px;
  color: var(--gold);
  font-size: 12px;
  font-weight: 700;
}
.toc-item {
  width: 100%;
  display: block;
  text-align: left;
  background: transparent;
  color: rgba(255,255,255,0.82);
  border: 0;
  border-left: 3px solid transparent;
  padding: 9px 18px 9px 22px;
  cursor: pointer;
  font-size: 14px;
  line-height: 1.35;
}
.toc-item:hover,
.toc-item.active {
  color: #fffdf8;
  background: rgba(255,255,255,0.08);
  border-left-color: var(--gold);
}
.toc-meta {
  display: block;
  color: rgba(255,255,255,0.48);
  font-size: 12px;
  margin-top: 3px;
}

.reader {
  min-width: 0;
  padding: 28px clamp(18px, 4vw, 46px) 80px;
}

.book-overview {
  padding: 30px clamp(22px, 4vw, 42px);
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
  margin-bottom: 18px;
}
.overview-copy h2 {
  margin: 0 0 22px;
  font-size: 42px;
  line-height: 1.12;
  max-width: 760px;
}
.overview-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
}
.overview-cell {
  border: 1px solid var(--line);
  border-top: 3px solid var(--teal);
  background: #faf8f2;
  padding: 14px 13px;
  border-radius: 8px;
}
.overview-cell strong { display: block; font-size: 24px; }
.overview-cell span { display: block; color: var(--muted); font-size: 13px; margin-top: 4px; }

.tool-row {
  position: sticky;
  top: 0;
  z-index: 2;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  padding: 12px 0;
  background: rgba(244,241,234,0.94);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.tool-row button,
.tool-row a {
  height: 36px;
  border: 1px solid var(--line);
  background: var(--white);
  color: var(--ink);
  border-radius: 8px;
  padding: 0 12px;
  font-size: 14px;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  cursor: pointer;
}
.tool-row button:hover,
.tool-row a:hover { border-color: var(--teal); }

.article-view {
  max-width: 960px;
  margin: 28px auto 0;
  background: var(--white);
  padding: clamp(30px, 5vw, 54px) clamp(22px, 5vw, 62px);
  box-shadow: var(--shadow);
  border: 1px solid var(--line);
  border-radius: 8px;
}
.article-kicker {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  color: var(--muted);
  font-size: 13px;
}
.badge {
  border-radius: 999px;
  padding: 4px 10px;
  background: #eef6f4;
  color: var(--teal);
  font-size: 12px;
  border: 1px solid rgba(36,112,106,0.12);
}
.badge.warn { background: #fff3e7; color: var(--copper); border-color: rgba(191,101,67,0.16); }
#articleSourceLink {
  color: var(--teal);
  text-decoration: none;
  border-bottom: 1px solid rgba(36,112,106,0.35);
}
.article-view h2 {
  margin: 14px 0 16px;
  font-size: 40px;
  line-height: 1.22;
  letter-spacing: 0;
}
.article-body { margin-top: 30px; }
.article-body p {
  margin: 0 0 17px;
  font-size: 18px;
  line-height: 1.98;
  color: #26313d;
}
.article-body p.source-label {
  padding: 13px 15px;
  background: #f1f6f5;
  border-left: 3px solid var(--teal);
  border-radius: 0 8px 8px 0;
}
.topic-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 22px;
}
.source-link {
  color: var(--teal);
  text-decoration: none;
  border-bottom: 1px solid rgba(36,112,106,0.35);
}
.market-panel {
  margin-top: 26px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}
.market-panel h3 {
  margin: 0 0 14px;
  font-size: 20px;
  line-height: 1.3;
}
.market-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}
.market-cell {
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #faf8f2;
  padding: 13px 14px;
}
.market-cell span {
  display: block;
  color: var(--muted);
  font-size: 12px;
  margin-bottom: 5px;
}
.market-cell strong {
  display: block;
  font-size: 15px;
  line-height: 1.45;
}
.market-note {
  margin: 10px 0 0;
  color: #4c5562;
  font-size: 15px;
  line-height: 1.75;
}
.deep-reading {
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}
.deep-reading h4 {
  margin: 0 0 10px;
  font-size: 16px;
}
.deep-reading p {
  color: #3d4651;
  font-size: 15px;
  line-height: 1.85;
  margin: 8px 0 0;
}
.market-section-title {
  margin: 18px 0 10px;
  font-size: 14px;
  color: var(--muted);
  font-weight: 700;
}
.kline-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin-top: 10px;
}
.kline-card {
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fffdf8;
  padding: 12px;
}
.kline-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
}
.kline-head strong {
  font-size: 15px;
  line-height: 1.35;
}
.market-up { color: #b4472f; }
.market-down { color: #287064; }
.kline-chart {
  width: 100%;
  height: 70px;
  margin: 8px 0;
  display: block;
}
.kline-meta {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 6px;
  color: var(--muted);
  font-size: 12px;
}
.kline-meta span {
  min-width: 0;
  white-space: nowrap;
}
.empty-state {
  padding: 28px;
  color: var(--muted);
}

@media (max-width: 980px) {
  .app-shell { grid-template-columns: 1fr; }
  .library-panel {
    position: relative;
    height: auto;
    max-height: none;
  }
  .reader { padding: 22px 16px 64px; }
  .book-overview { padding: 20px; }
  .overview-copy h2 { font-size: 34px; }
  .overview-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .article-view {
    margin-top: 24px;
    padding: 34px 22px;
  }
  .market-grid { grid-template-columns: 1fr; }
  .kline-grid { grid-template-columns: 1fr; }
  .article-view h2 { font-size: 29px; }
  .article-body p { font-size: 16px; line-height: 1.85; }
}

@media (max-width: 520px) {
  .brand-block { padding: 24px 20px 18px; }
  .search-area { padding: 14px 16px; }
  .overview-grid { grid-template-columns: 1fr; }
  .tool-row button,
  .tool-row a { flex: 1 1 auto; justify-content: center; }
}