:root {
  color-scheme: dark;
  --bg: #0b0f12;
  --panel: #151b1f;
  --panel-2: #1d2529;
  --text: #eef2ef;
  --muted: #99a6a0;
  --line: #2b3734;
  --green: #4fd08a;
  --amber: #f3b44e;
  --red: #ef6b6b;
  --blue: #76a7ff;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-width: 320px;
  background: var(--bg);
  color: var(--text);
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
}

button,
input {
  font: inherit;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 18px clamp(18px, 4vw, 42px);
  background: rgba(11, 15, 18, 0.9);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(14px);
}

.topbar h1,
.briefing h2,
.section-heading h2,
.sidebar h2 {
  margin: 0;
  letter-spacing: 0;
}

.topbar h1 {
  font-size: clamp(24px, 3vw, 38px);
}

.eyebrow {
  margin: 0 0 6px;
  color: var(--green);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
}

.top-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--muted);
}

.icon-button {
  width: 40px;
  height: 40px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  color: var(--text);
  cursor: pointer;
}

main {
  padding: 24px clamp(18px, 4vw, 42px) 48px;
}

.overview {
  display: block;
}

.briefing,
.sidebar {
  border: 1px solid var(--line);
  background: var(--panel);
  border-radius: 8px;
  padding: 22px;
}

.briefing h2 {
  max-width: 820px;
  font-size: 25px;
  line-height: 1.25;
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  margin: 22px 0;
}

.metric-grid div {
  padding: 14px;
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.metric-grid strong {
  display: block;
  font-size: 28px;
}

.metric-grid span,
.note,
.updated-at,
.section-heading span {
  color: var(--muted);
}

.keyword-panel {
  margin: 18px 0;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

.keyword-panel h3 {
  margin: 0 0 10px;
  font-size: 16px;
}

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

.keyword-list button {
  min-height: 34px;
  border: 1px solid rgba(79, 208, 138, 0.45);
  border-radius: 999px;
  padding: 0 12px;
  background: rgba(79, 208, 138, 0.11);
  color: var(--text);
  cursor: pointer;
}

.keyword-list button.active {
  background: rgba(79, 208, 138, 0.26);
  border-color: var(--green);
}

.controls {
  display: flex;
  align-items: center;
  gap: 14px;
  margin: 22px 0;
}

.search-wrap {
  flex: 0 0 min(380px, 100%);
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
}

.search-wrap input {
  width: 100%;
  height: 42px;
  border: 0;
  outline: 0;
  background: transparent;
  color: var(--text);
}

.tabs {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 2px;
}

.tabs button {
  min-height: 42px;
  white-space: nowrap;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0 14px;
  background: var(--panel);
  color: var(--muted);
  cursor: pointer;
}

.tabs button.active {
  color: var(--text);
  border-color: var(--green);
  background: rgba(79, 208, 138, 0.12);
}

.layout {
  display: grid;
  grid-template-columns: 320px minmax(0, 1fr);
  gap: 22px;
}

.sidebar {
  position: sticky;
  top: 104px;
  height: fit-content;
}

.relation-item {
  padding: 14px 0;
  border-top: 1px solid var(--line);
}

.relation-item strong {
  display: block;
  margin-bottom: 6px;
}

.relation-item p {
  margin: 0;
  color: var(--muted);
  line-height: 1.55;
}

.section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 14px;
}

.news-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.news-card,
.paper-card {
  min-height: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  padding: 18px;
}

.card-head,
.news-card footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.region-tag,
.risk-tag,
.paper-tag,
.category-tag {
  display: inline-flex;
  align-items: center;
  min-height: 26px;
  padding: 0 9px;
  border-radius: 999px;
  font-size: 12px;
  color: var(--text);
  border: 1px solid var(--line);
}

.risk-high {
  background: rgba(239, 107, 107, 0.18);
  border-color: rgba(239, 107, 107, 0.5);
}

.risk-medium {
  background: rgba(243, 180, 78, 0.18);
  border-color: rgba(243, 180, 78, 0.5);
}

.risk-low {
  background: rgba(79, 208, 138, 0.15);
  border-color: rgba(79, 208, 138, 0.45);
}

.news-card h3,
.paper-card h3 {
  margin: 14px 0 8px;
  font-size: 18px;
  line-height: 1.35;
}

.summary,
.paper-card p {
  margin: 0;
  color: #c7d0cc;
  line-height: 1.65;
}

dl {
  margin: 14px 0;
}

dl div {
  padding: 10px 0;
  border-top: 1px solid var(--line);
}

dt {
  margin-bottom: 5px;
  color: var(--green);
  font-size: 13px;
  font-weight: 700;
}

dd {
  margin: 0;
  color: var(--muted);
  line-height: 1.55;
}

.category-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.category-tag {
  color: var(--blue);
  background: rgba(118, 167, 255, 0.12);
  border-color: rgba(118, 167, 255, 0.35);
}

.news-card footer {
  padding-top: 12px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 12px;
}

.paper-card footer {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 12px;
}

.paper-result {
  margin-top: 12px !important;
  color: var(--muted) !important;
}

.article-link {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  margin-top: 12px;
  color: var(--green);
  text-decoration: none;
  font-weight: 700;
}

.empty-state {
  grid-column: 1 / -1;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  color: var(--muted);
}

.papers {
  margin-top: 32px;
}

.paper-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.paper-tag {
  color: var(--blue);
  border-color: rgba(118, 167, 255, 0.45);
  background: rgba(118, 167, 255, 0.12);
}

@media (max-width: 1100px) {
  .overview,
  .layout {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: static;
  }
}

@media (max-width: 760px) {
  .topbar,
  .controls,
  .section-heading {
    align-items: stretch;
    flex-direction: column;
  }

  .news-grid,
  .paper-grid,
  .metric-grid {
    grid-template-columns: 1fr;
  }

  .top-actions {
    justify-content: space-between;
  }
}