:root {
  --bg: #f7f8fa;
  --surface: #ffffff;
  --text: #1a1d21;
  --muted: #6b7280;
  --border: #e5e7eb;
  --brand: #6366f1;
  --brand-2: #8b5cf6;
  --brand-soft: #eef2ff;
  --accent: #111827;
  --radius: 14px;
  --shadow: 0 1px 3px rgba(16, 24, 40, 0.06), 0 1px 2px rgba(16, 24, 40, 0.04);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  max-width: 920px;
  margin: 0 auto;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  gap: 16px;
}
.logo {
  font-weight: 700;
  font-size: 18px;
  letter-spacing: -0.01em;
  color: var(--accent);
  display: flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
}
.logo .dot {
  width: 10px; height: 10px; border-radius: 50%;
  background: linear-gradient(135deg, #6366f1, #8b5cf6);
  display: inline-block;
}
.search-form {
  margin-left: auto;
  display: flex;
  gap: 8px;
  flex: 1;
  max-width: 420px;
}
.search-form input {
  flex: 1;
  padding: 9px 12px;
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 14px;
  outline: none;
  background: var(--surface);
}
.search-form input:focus { border-color: var(--brand); }
.search-form button {
  border: none;
  background: var(--brand);
  color: #fff;
  border-radius: 999px;
  padding: 0 16px;
  font-size: 14px;
  cursor: pointer;
}

.container {
  max-width: 920px;
  margin: 0 auto;
  padding: 24px 20px 64px;
}

.page-title {
  font-size: 22px;
  font-weight: 700;
  margin: 8px 0 4px;
}
.page-sub {
  color: var(--muted);
  font-size: 14px;
  margin: 0 0 20px;
}

/* Featured / breaking strip */
.featured {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 14px;
  margin-bottom: 22px;
}
.featured .lead {
  background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
  color: #fff;
  border-radius: var(--radius);
  padding: 22px 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 180px;
  box-shadow: var(--shadow);
}
.featured .lead .kicker {
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  opacity: 0.85;
}
.featured .lead h2 {
  font-size: 21px;
  line-height: 1.35;
  margin: 12px 0 8px;
}
.featured .lead .meta { font-size: 13px; opacity: 0.9; }
.featured .lead a { color: #fff; }
.featured .side {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.featured .side .item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 14px;
  box-shadow: var(--shadow);
  transition: transform .12s ease;
}
.featured .side .item:hover { transform: translateY(-2px); }
.featured .side .item .tag {
  font-size: 11px;
  color: #b91c1c;
  font-weight: 600;
}
.featured .side .item a {
  color: var(--text);
  font-size: 14px;
  font-weight: 600;
  line-height: 1.4;
  display: block;
  margin-top: 4px;
}
.featured .side .item .src { font-size: 12px; color: var(--muted); margin-top: 4px; }

/* Bucket filter chips */
.chips {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}
.chip {
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--muted);
  border-radius: 999px;
  padding: 6px 14px;
  font-size: 13px;
  cursor: pointer;
  transition: all .15s ease;
}
.chip:hover { border-color: var(--brand); color: var(--brand); }
.chip.active {
  background: var(--brand);
  border-color: var(--brand);
  color: #fff;
}

.feed { display: grid; gap: 14px; }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 20px;
  box-shadow: var(--shadow);
  transition: transform .12s ease, box-shadow .12s ease;
}
.card:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(16,24,40,.08);
}
.card h2 {
  margin: 0 0 8px;
  font-size: 18px;
  line-height: 1.35;
}
.card h2 a { color: var(--text); }
.card .meta {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  color: var(--muted);
  font-size: 13px;
  margin-bottom: 10px;
}
.badge {
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--brand-soft);
  color: var(--brand);
  font-weight: 600;
}
.badge.breaking { background: #fee2e2; color: #b91c1c; }
.badge.featured { background: #fef3c7; color: #b45309; }
.card .summary {
  color: #374151;
  font-size: 14.5px;
  margin: 0 0 12px;
}
.card .tags { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 8px; }
.tag {
  font-size: 12px;
  color: var(--muted);
  background: #f3f4f6;
  border-radius: 6px;
  padding: 2px 8px;
}
.card .orig { font-size: 13px; }

/* Card with thumbnail */
.card.with-thumb { display: flex; gap: 16px; align-items: flex-start; }
.card.with-thumb .thumb {
  width: 132px;
  height: 92px;
  flex-shrink: 0;
  border-radius: 10px;
  object-fit: cover;
  background: #eef2ff;
}
.card.with-thumb .body { flex: 1; min-width: 0; }

.empty, .error {
  text-align: center;
  color: var(--muted);
  padding: 60px 20px;
}
.error { color: #b91c1c; }

/* Empty guide (richer) */
.empty-guide {
  text-align: center;
  padding: 56px 24px;
  background: var(--surface);
  border: 1px dashed var(--border);
  border-radius: var(--radius);
}
.empty-guide .eg-icon {
  width: 56px; height: 56px; border-radius: 50%;
  background: #eef2ff; color: var(--brand);
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 14px; font-size: 22px;
}
.empty-guide h3 { margin: 0 0 8px; font-size: 16px; color: var(--text); }
.empty-guide p { margin: 0 0 14px; color: var(--muted); font-size: 13.5px; max-width: 420px; margin-inline: auto; }
.empty-guide a.btn {
  display: inline-block;
  background: var(--brand);
  color: #fff;
  border-radius: 999px;
  padding: 8px 18px;
  font-size: 14px;
}
.empty-guide a.btn:hover { text-decoration: none; opacity: .92; }

.pagination {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-top: 28px;
}
.pagination button {
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: 999px;
  padding: 8px 18px;
  cursor: pointer;
  font-size: 14px;
}
.pagination button:disabled { opacity: .45; cursor: default; }

/* Search highlight */
mark.hl {
  background: #fde68a;
  color: #1a1d21;
  padding: 0 2px;
  border-radius: 3px;
}

/* Article detail */
.article { background: var(--surface); border:1px solid var(--border); border-radius: var(--radius); padding: 28px 30px; box-shadow: var(--shadow); }
.article h1 { font-size: 28px; line-height: 1.3; margin: 4px 0 12px; }
.article .meta { color: var(--muted); font-size: 14px; margin-bottom: 18px; display:flex; gap:10px; flex-wrap:wrap; align-items:center;}
.article .hero { width: 100%; border-radius: 12px; margin: 0 0 20px; }
.article .body { font-size: 16px; color: #1f2937; white-space: pre-wrap; word-break: break-word; }
.article .ai-summary {
  background: var(--brand-soft);
  border-left: 3px solid var(--brand);
  padding: 12px 16px;
  border-radius: 8px;
  margin: 0 0 20px;
  color: #3730a3;
  font-size: 15px;
}
.back { display:inline-block; margin-bottom: 16px; font-size: 14px; }

@media (max-width: 680px) {
  .featured { grid-template-columns: 1fr; }
  .card.with-thumb { flex-direction: column; }
  .card.with-thumb .thumb { width: 100%; height: 160px; }
}