:root {
  --bg: #f5f7fb;
  --panel: rgba(255,255,255,.88);
  --panel-solid: #fff;
  --text: #172033;
  --muted: #65738a;
  --line: #dfe6f0;
  --primary: #3867ff;
  --primary-dark: #2149c8;
  --primary-soft: #e9efff;
  --success-soft: #e9f9ef;
  --warning-soft: #fff7e4;
  --shadow: 0 24px 70px rgba(31, 49, 89, .12);
  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-sm: 12px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(56,103,255,.16), transparent 32rem),
    radial-gradient(circle at 80% 5%, rgba(37, 196, 156, .12), transparent 28rem),
    var(--bg);
  color: var(--text);
}
a { color: inherit; }
code {
  padding: .12rem .35rem;
  border-radius: .4rem;
  background: #eef2f7;
  color: #31415f;
  font-size: .92em;
}
.app-shell { max-width: 1180px; margin: 0 auto; padding: 24px; }
.hero {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: stretch;
  padding: 30px;
  border: 1px solid rgba(255,255,255,.7);
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, rgba(255,255,255,.92), rgba(246,249,255,.78));
  box-shadow: var(--shadow);
  backdrop-filter: blur(14px);
}
.eyebrow { margin: 0 0 8px; color: var(--primary); font-weight: 800; letter-spacing: .08em; text-transform: uppercase; }
.hero h1 { margin: 0; font-size: clamp(30px, 5vw, 52px); line-height: 1.05; letter-spacing: -.04em; }
.hero__desc { margin: 14px 0 0; color: var(--muted); max-width: 720px; font-size: 16px; line-height: 1.8; }
.hero__actions { display: flex; gap: 12px; align-items: flex-start; flex-wrap: wrap; justify-content: flex-end; min-width: 210px; }
.btn {
  border: 1px solid transparent;
  border-radius: 999px;
  padding: 12px 18px;
  font-weight: 800;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: transform .18s ease, box-shadow .18s ease, background .18s ease;
  font-size: 14px;
}
.btn:hover { transform: translateY(-1px); }
.btn.primary { background: var(--primary); color: #fff; box-shadow: 0 14px 28px rgba(56,103,255,.24); }
.btn.primary:hover { background: var(--primary-dark); }
.btn.ghost { background: #fff; border-color: var(--line); color: var(--text); }
.btn.small { padding: 8px 12px; font-size: 13px; background: #fff; border-color: var(--line); color: var(--muted); }
.toolbar {
  margin: 22px 0 16px;
  padding: 16px;
  border-radius: var(--radius-md);
  background: var(--panel);
  border: 1px solid rgba(255,255,255,.8);
  box-shadow: 0 16px 36px rgba(31,49,89,.08);
}
.search-box { position: relative; }
.search-icon { position: absolute; left: 15px; top: 50%; transform: translateY(-50%); color: var(--muted); font-size: 20px; }
.search-box input {
  width: 100%;
  height: 52px;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0 18px 0 44px;
  font-size: 16px;
  outline: none;
  background: #fff;
}
.search-box input:focus { border-color: rgba(56,103,255,.55); box-shadow: 0 0 0 4px rgba(56,103,255,.1); }
.toolbar__row { display: flex; gap: 12px; margin-top: 12px; }
select {
  width: 100%;
  height: 44px;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 0 12px;
  background: #fff;
  color: var(--text);
  font-weight: 650;
}
.stats-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; margin: 16px 0 22px; }
.stat-card { padding: 18px; border-radius: var(--radius-md); background: var(--panel-solid); border: 1px solid var(--line); box-shadow: 0 12px 32px rgba(31,49,89,.06); }
.stat-card strong { display: block; font-size: 28px; line-height: 1; letter-spacing: -.03em; }
.stat-card span { display: block; margin-top: 8px; color: var(--muted); font-size: 13px; font-weight: 700; }
.layout { display: grid; grid-template-columns: 286px minmax(0, 1fr); gap: 20px; align-items: start; }
.side-panel { position: sticky; top: 16px; display: grid; gap: 14px; }
.panel-card, .content-panel {
  border-radius: var(--radius-lg);
  background: var(--panel);
  border: 1px solid rgba(255,255,255,.8);
  box-shadow: 0 16px 40px rgba(31,49,89,.08);
  padding: 18px;
}
.panel-card h2, .content-head h2 { margin: 0 0 12px; font-size: 18px; }
.panel-card.note p { color: var(--muted); line-height: 1.75; margin: 0; font-size: 14px; }
.chip-list { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 8px 11px;
  background: #fff;
  color: var(--muted);
  cursor: pointer;
  font-size: 13px;
  font-weight: 800;
}
.chip.active { color: var(--primary); border-color: rgba(56,103,255,.34); background: var(--primary-soft); }
.tag-cloud .chip { font-size: 12px; padding: 7px 10px; }
.content-head { display: flex; justify-content: space-between; gap: 12px; align-items: flex-start; margin-bottom: 14px; }
.content-head p { margin: -6px 0 0; color: var(--muted); font-size: 14px; }
.cards-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.web-card {
  border: 1px solid var(--line);
  background: #fff;
  border-radius: var(--radius-md);
  padding: 16px;
  display: flex;
  flex-direction: column;
  min-height: 215px;
  transition: transform .16s ease, box-shadow .16s ease, border-color .16s ease;
}
.web-card:hover { transform: translateY(-2px); box-shadow: 0 18px 38px rgba(31,49,89,.12); border-color: rgba(56,103,255,.28); }
.card-top { display: flex; justify-content: space-between; align-items: flex-start; gap: 10px; }
.badge { display: inline-flex; border-radius: 999px; padding: 6px 9px; background: var(--primary-soft); color: var(--primary); font-size: 12px; font-weight: 900; white-space: nowrap; }
.favorite {
  border: 0;
  background: #f4f6fa;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 18px;
  color: #b0bacb;
}
.favorite.active { color: #ffb000; background: var(--warning-soft); }
.web-card h3 { margin: 12px 0 8px; font-size: 18px; line-height: 1.35; letter-spacing: -.02em; }
.web-card p { margin: 0; color: var(--muted); line-height: 1.65; font-size: 14px; flex: 1; }
.meta { display: flex; flex-wrap: wrap; gap: 8px; margin: 14px 0 12px; }
.meta span { font-size: 12px; color: var(--muted); background: #f4f6fa; border-radius: 999px; padding: 6px 8px; font-weight: 700; }
.card-actions { display: flex; gap: 8px; margin-top: auto; }
.card-actions .open { flex: 1; background: var(--primary); color: #fff; border-radius: 12px; text-decoration: none; text-align: center; padding: 11px 12px; font-weight: 900; }
.card-actions .copy { border: 1px solid var(--line); background: #fff; border-radius: 12px; padding: 0 12px; cursor: pointer; font-weight: 900; color: var(--muted); }
.empty-state { text-align: center; padding: 50px 16px; color: var(--muted); }
.empty-state h3 { color: var(--text); margin: 0 0 8px; }
.toast {
  position: fixed;
  left: 50%;
  bottom: 22px;
  transform: translateX(-50%);
  background: #172033;
  color: #fff;
  padding: 12px 16px;
  border-radius: 999px;
  font-weight: 800;
  box-shadow: 0 18px 42px rgba(0,0,0,.22);
  z-index: 999;
  opacity: 0;
  pointer-events: none;
  transition: opacity .2s ease, transform .2s ease;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(-4px); }
@media (max-width: 920px) {
  .layout { grid-template-columns: 1fr; }
  .side-panel { position: static; grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .panel-card.note { grid-column: 1 / -1; }
}
@media (max-width: 720px) {
  .app-shell { padding: 14px; }
  .hero { flex-direction: column; padding: 22px; }
  .hero__actions { justify-content: stretch; min-width: 0; }
  .hero__actions .btn { flex: 1; }
  .stats-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .side-panel { grid-template-columns: 1fr; }
  .cards-grid { grid-template-columns: 1fr; }
  .toolbar__row { flex-direction: column; }
  .content-head { align-items: stretch; flex-direction: column; }
  .content-head .btn { align-self: flex-start; }
}