/* ============ 基础变量 ============ */
:root {
  --bg: #f5f6f8;
  --bg-soft: #ffffff;
  --bg-elev: #ffffff;
  --border: #e8eaed;
  --text: #1a1d23;
  --text-soft: #5b6472;
  --text-mute: #8a93a3;
  --brand: #4f6ef7;
  --brand-soft: #eef2ff;
  --accent: #ff5a5f;
  --ok: #22c55e;
  --warn: #f59e0b;
  --err: #ef4444;
  --shadow: 0 1px 2px rgba(20, 30, 60, .04), 0 6px 24px rgba(20, 30, 60, .06);
  --shadow-hover: 0 4px 12px rgba(20, 30, 60, .08), 0 16px 40px rgba(20, 30, 60, .12);
  --radius: 16px;
  --radius-sm: 10px;
  --maxw: 1180px;
  --font: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

.theme-dark {
  --bg: #0d1117;
  --bg-soft: #161b22;
  --bg-elev: #1c2129;
  --border: #2a313c;
  --text: #e6edf3;
  --text-soft: #9aa6b6;
  --text-mute: #6b7689;
  --brand: #6f8bff;
  --brand-soft: #1a2236;
  --accent: #ff6b70;
  --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 6px 24px rgba(0, 0, 0, .4);
  --shadow-hover: 0 4px 12px rgba(0, 0, 0, .4), 0 16px 40px rgba(0, 0, 0, .55);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  transition: background .35s ease, color .35s ease;
}
a { color: inherit; text-decoration: none; }

/* ============ 顶栏 ============ */
.topbar {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg-soft) 88%, transparent);
  backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--border);
}
.topbar-inner {
  max-width: var(--maxw); margin: 0 auto;
  display: flex; align-items: center; gap: 18px;
  padding: 12px 20px;
}
.brand { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.brand-logo {
  font-size: 26px;
  filter: drop-shadow(0 2px 6px rgba(79, 110, 247, .35));
  animation: pulse 3s ease-in-out infinite;
}
@keyframes pulse { 0%,100% { transform: translateY(0) } 50% { transform: translateY(-2px) } }
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-text strong { font-size: 18px; font-weight: 700; letter-spacing: .2px; }
.brand-text small { font-size: 11px; color: var(--text-mute); }

.search-wrap {
  flex: 1; max-width: 480px; position: relative;
  display: flex; align-items: center;
}
.search-icon { position: absolute; left: 14px; color: var(--text-mute); pointer-events: none; }
.search-input {
  width: 100%; padding: 11px 38px 11px 42px;
  border: 1px solid var(--border); border-radius: 999px;
  background: var(--bg-elev); color: var(--text);
  font-size: 14px; font-family: inherit;
  transition: border-color .2s, box-shadow .2s, background .35s;
}
.search-input:focus {
  outline: none; border-color: var(--brand);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--brand) 18%, transparent);
}
.search-clear {
  position: absolute; right: 8px;
  border: none; background: var(--border); color: var(--text-soft);
  width: 22px; height: 22px; border-radius: 50%; cursor: pointer;
  font-size: 12px; line-height: 1;
}

.topbar-actions { display: flex; gap: 8px; margin-left: auto; }
.icon-btn {
  display: inline-flex; align-items: center; justify-content: center;
  width: 40px; height: 40px; border-radius: 12px;
  border: 1px solid var(--border); background: var(--bg-elev); color: var(--text-soft);
  cursor: pointer; transition: all .2s;
}
.icon-btn:hover:not(:disabled) { color: var(--brand); border-color: var(--brand); transform: translateY(-1px); }
.icon-btn:disabled { opacity: .5; cursor: not-allowed; }
.spin { animation: spin 1s linear infinite; }
@keyframes spin { to { transform: rotate(360deg) } }

/* ============ 筛选区 ============ */
.filters { border-bottom: 1px solid var(--border); }
.filters-inner {
  max-width: var(--maxw); margin: 0 auto; padding: 16px 20px;
  display: flex; align-items: flex-end; gap: 20px; flex-wrap: wrap;
}
.filter-group { display: flex; flex-direction: column; gap: 6px; }
.sort-group { margin-left: auto; }
.filter-label { font-size: 11px; font-weight: 600; color: var(--text-mute); text-transform: uppercase; letter-spacing: .6px; }
.chips { display: flex; gap: 6px; flex-wrap: wrap; }
.chip {
  padding: 7px 14px; border-radius: 999px;
  border: 1px solid var(--border); background: var(--bg-elev); color: var(--text-soft);
  font-size: 13px; font-weight: 500; font-family: inherit; cursor: pointer;
  transition: all .2s;
}
.chip:hover { border-color: var(--brand); color: var(--brand); }
.chip.active { background: var(--brand); border-color: var(--brand); color: #fff; box-shadow: 0 4px 12px rgba(79,110,247,.3); }
.select {
  padding: 7px 30px 7px 12px; border-radius: 999px;
  border: 1px solid var(--border); background: var(--bg-elev); color: var(--text);
  font-size: 13px; font-family: inherit; cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath fill='%238a93a3' d='M7 10l5 5 5-5z'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 8px center; background-size: 18px;
}
.select:focus { outline: none; border-color: var(--brand); }
.filter-meta { align-self: flex-end; padding-bottom: 2px; }
.count-badge {
  font-size: 12px; font-weight: 600; color: var(--brand);
  background: var(--brand-soft); padding: 5px 12px; border-radius: 999px;
}

/* ============ 状态条 ============ */
.status-bar { border-bottom: 1px solid var(--border); background: var(--bg-soft); }
.status-inner {
  max-width: var(--maxw); margin: 0 auto; padding: 10px 20px;
  display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
}
.status-summary { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--text-soft); }
.dot { width: 8px; height: 8px; border-radius: 50%; background: var(--text-mute); }
.dot.ok { background: var(--ok); box-shadow: 0 0 0 3px color-mix(in srgb, var(--ok) 25%, transparent); }
.dot.loading { background: var(--warn); animation: blink 1s infinite; }
.dot.partial { background: var(--warn); }
.dot.err { background: var(--err); }
@keyframes blink { 0%,100% { opacity: 1 } 50% { opacity: .3 } }
.link-btn { background: none; border: none; color: var(--brand); font-size: 13px; font-weight: 500; cursor: pointer; font-family: inherit; padding: 0; }
.link-btn:hover { text-decoration: underline; }

.source-grid {
  max-width: var(--maxw); margin: 0 auto; padding: 0 20px 16px;
  display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 8px;
}
.source-pill {
  display: flex; align-items: center; gap: 8px;
  padding: 7px 11px; border-radius: var(--radius-sm);
  background: var(--bg-elev); border: 1px solid var(--border); font-size: 12px;
}
.pill-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--text-mute); flex-shrink: 0; }
.source-pill.ok .pill-dot { background: var(--ok); }
.source-pill.err .pill-dot { background: var(--err); }
.source-pill.loading .pill-dot { background: var(--warn); animation: blink 1s infinite; }
.pill-name { flex: 1; color: var(--text-soft); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.pill-count { font-weight: 700; color: var(--brand); }

/* expand 过渡 */
.expand-enter-active, .expand-leave-active { transition: all .3s ease; overflow: hidden; }
.expand-enter-from, .expand-leave-to { opacity: 0; max-height: 0; }
.expand-enter-to, .expand-leave-from { opacity: 1; max-height: 600px; }

/* ============ 信息流 ============ */
.feed { max-width: var(--maxw); margin: 0 auto; padding: 24px 20px 60px; }
.cards { display: grid; grid-template-columns: 1fr; gap: 10px; }

.card {
  background: var(--bg-elev); border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  transition: transform .2s cubic-bezier(.2,.7,.3,1), box-shadow .2s, border-color .2s;
}
.card:hover { transform: translateX(3px); box-shadow: var(--shadow); border-color: color-mix(in srgb, var(--brand) 45%, var(--border)); }
.card:active { transform: translateX(3px) scale(.995); }
.card-link { display: block; cursor: pointer; }

.card-body { padding: 13px 16px; }
.card-head { display: flex; align-items: center; gap: 9px; margin-bottom: 8px; }
.source-icon { width: 26px; height: 26px; flex-shrink: 0; border-radius: 7px; overflow: hidden; display: flex; align-items: center; justify-content: center; }
.favicon { width: 100%; height: 100%; object-fit: contain; display: block; }
.fav-fallback { width: 100%; height: 100%; display: flex; align-items: center; justify-content: center; color: #fff; font-size: 13px; font-weight: 700; border-radius: 7px; }
.card-tags { display: flex; gap: 6px; flex: 1; min-width: 0; overflow: hidden; }
.card-time { white-space: nowrap; font-size: 12px; color: var(--text-mute); font-variant-numeric: tabular-nums; flex-shrink: 0; }

.tag { font-size: 11px; font-weight: 600; padding: 2px 8px; border-radius: 5px; white-space: nowrap; }
.tag-company { background: color-mix(in srgb, var(--brand) 10%, transparent); color: var(--brand); }
.tag-type { background: color-mix(in srgb, var(--accent) 14%, transparent); color: var(--accent); }

.card-title { font-size: 15px; font-weight: 600; line-height: 1.45; margin: 0 0 8px; color: var(--text); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.card:hover .card-title { color: var(--brand); }

.ai-summary { background: linear-gradient(135deg, color-mix(in srgb, var(--brand) 8%, transparent), color-mix(in srgb, var(--accent) 6%, transparent)); border-left: 3px solid var(--brand); border-radius: 6px; padding: 8px 11px; margin: 0 0 9px; }
.ai-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 4px; }
.ai-badge { display: inline-flex; align-items: center; gap: 3px; font-size: 11px; font-weight: 700; color: var(--brand); letter-spacing: .3px; }
.translate-btn { border: 1px solid var(--border); background: var(--bg-elev); color: var(--text-soft); font-size: 11px; font-weight: 600; padding: 2px 9px; border-radius: 5px; cursor: pointer; font-family: inherit; transition: all .15s; }
.translate-btn:hover { color: var(--brand); border-color: var(--brand); }
.translate-btn.active { background: var(--brand); color: #fff; border-color: var(--brand); }
.translate-all-btn { margin-left: 8px; border: 1px solid var(--brand); background: var(--brand-soft); color: var(--brand); font-size: 12px; font-weight: 600; padding: 5px 12px; border-radius: 999px; cursor: pointer; font-family: inherit; transition: all .2s; }
.translate-all-btn:hover:not(:disabled) { background: var(--brand); color: #fff; }
.translate-all-btn:disabled { opacity: .5; cursor: not-allowed; }
.ai-text { font-size: 13px; color: var(--text); line-height: 1.55; margin: 0; }

.card-foot { display: flex; align-items: center; justify-content: space-between; font-size: 12px; color: var(--text-mute); }
.card-source { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 60%; }
.card-go { color: var(--brand); font-weight: 600; white-space: nowrap; transition: transform .2s; }
.card:hover .card-go { transform: translateX(3px); }

mark { background: color-mix(in srgb, var(--warn) 45%, transparent); color: inherit; border-radius: 3px; padding: 0 2px; }

/* 卡片入场动画 */
.card-enter-active { transition: all .45s cubic-bezier(.2,.7,.3,1); transition-delay: calc(var(--i) * 30ms); }
.card-enter-from { opacity: 0; transform: translateY(16px) scale(.98); }
.card-move { transition: transform .4s cubic-bezier(.2,.7,.3,1); }

/* ============ 骨架屏 ============ */
.skeleton { pointer-events: none; }
.skeleton .sk-body { padding: 13px 16px; }
.sk-line { height: 11px; background: var(--border); border-radius: 6px; margin-bottom: 9px; }
.sk-line.w30 { width: 30%; } .sk-line.w40 { width: 40%; } .sk-line.w50 { width: 50%; }
.sk-line.w70 { width: 70%; } .sk-line.w90 { width: 90%; }
.skeleton, .sk-line { position: relative; overflow: hidden; }
.skeleton::after, .sk-line::after {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(90deg, transparent, color-mix(in srgb, var(--text) 6%, transparent), transparent);
  animation: shimmer 1.4s infinite;
}
@keyframes shimmer { from { transform: translateX(-100%) } to { transform: translateX(100%) } }

/* ============ 空状态 ============ */
.empty { text-align: center; padding: 80px 20px; color: var(--text-mute); }
.empty-emoji { font-size: 56px; margin-bottom: 12px; }
.empty p { margin: 0 0 14px; font-size: 15px; }

/* ============ 页脚 ============ */
.footer { border-top: 1px solid var(--border); padding: 24px 20px; text-align: center; color: var(--text-mute); font-size: 12px; }
.footer p { margin: 2px 0; }
.footer-hint { opacity: .7; }
.footer-author { margin-top: 8px; font-size: 13px; }
.footer-author strong { color: var(--brand); font-weight: 700; }

/* ============ 响应式 ============ */
@media (max-width: 760px) {
  .topbar-inner { flex-wrap: wrap; gap: 12px; padding: 10px 14px; }
  .search-wrap { order: 3; flex-basis: 100%; max-width: none; }
  .filters-inner { padding: 12px 14px; gap: 14px; }
  .sort-group { margin-left: 0; }
  .cards { grid-template-columns: 1fr; }
  .feed { padding: 16px 14px 40px; }
}