:root {
  --bg: #0b1020;
  --panel: rgba(15, 23, 42, 0.72);
  --panel-border: rgba(148, 163, 184, 0.18);
  --card: rgba(15, 23, 42, 0.88);
  --text: #e5eefb;
  --muted: #9fb0cc;
  --primary: #5eead4;
  --primary-dark: #14b8a6;
  --secondary: #60a5fa;
  --shadow: 0 20px 60px rgba(0, 0, 0, 0.35);
  --radius: 24px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "Microsoft YaHei", "PingFang SC", "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(96, 165, 250, 0.18), transparent 28%),
    radial-gradient(circle at top right, rgba(94, 234, 212, 0.15), transparent 25%),
    linear-gradient(160deg, #020617 0%, #0f172a 45%, #111827 100%);
  min-height: 100vh;
}

a { color: inherit; text-decoration: none; }
code {
  padding: 0.16rem 0.42rem;
  border-radius: 10px;
  background: rgba(148, 163, 184, 0.14);
  color: #c4f7ee;
}

.site-shell,
.page-shell {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 40px 0 60px;
}

.hero,
.panel,
.sub-hero,
.content-card {
  border: 1px solid var(--panel-border);
  background: var(--panel);
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow);
}

.hero,
.sub-hero {
  border-radius: 32px;
  padding: 42px;
}

.hero-badge,
.page-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: 999px;
  color: #c4fff7;
  background: rgba(45, 212, 191, 0.12);
  border: 1px solid rgba(94, 234, 212, 0.25);
  font-size: 14px;
}

.hero h1,
.sub-hero h1 {
  margin: 18px 0 14px;
  font-size: clamp(2rem, 3.6vw, 3.5rem);
  line-height: 1.12;
}

.hero-desc,
.sub-hero p,
.panel p,
.card-desc,
.content-card p,
.meta-list li {
  color: var(--muted);
  line-height: 1.75;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 24px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 20px;
  border-radius: 14px;
  font-weight: 700;
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}

.btn:hover { transform: translateY(-2px); }

.btn-primary {
  color: #082f49;
  background: linear-gradient(135deg, var(--primary), #67e8f9);
}

.btn-secondary {
  color: var(--text);
  background: rgba(96, 165, 250, 0.12);
  border: 1px solid rgba(96, 165, 250, 0.28);
}

.panel {
  border-radius: 24px;
  padding: 26px;
  margin-top: 24px;
}

.toolbar {
  display: flex;
  gap: 18px;
  justify-content: space-between;
  align-items: center;
}

.toolbar h2,
.content-card h3,
.card-title {
  margin: 0;
}

.toolbar-right {
  display: flex;
  gap: 14px;
  align-items: center;
  flex-wrap: wrap;
}

.search-box {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: min(360px, 100%);
  padding: 0 14px;
  height: 48px;
  border-radius: 14px;
  background: rgba(15, 23, 42, 0.88);
  border: 1px solid rgba(148, 163, 184, 0.18);
}

.search-box input {
  width: 100%;
  border: 0;
  outline: none;
  color: var(--text);
  background: transparent;
  font-size: 15px;
}

.count-box {
  padding: 0 14px;
  height: 48px;
  display: inline-flex;
  align-items: center;
  border-radius: 14px;
  background: rgba(15, 23, 42, 0.88);
  border: 1px solid rgba(148, 163, 184, 0.18);
  color: var(--muted);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
  margin-top: 24px;
}

.card-link {
  display: block;
  height: 100%;
}

.card {
  position: relative;
  height: 100%;
  min-height: 220px;
  padding: 24px;
  border-radius: 24px;
  border: 1px solid rgba(148, 163, 184, 0.16);
  background: var(--card);
  box-shadow: var(--shadow);
  transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease;
}

.card:hover {
  transform: translateY(-4px);
  border-color: rgba(94, 234, 212, 0.36);
  box-shadow: 0 26px 60px rgba(8, 47, 73, 0.35);
}

.card-top {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: flex-start;
}

.card-folder {
  font-size: 13px;
  color: #c4fff7;
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(94, 234, 212, 0.1);
  border: 1px solid rgba(94, 234, 212, 0.24);
}

.card-arrow {
  font-size: 22px;
  color: #93c5fd;
}

.card-title {
  margin-top: 18px;
  font-size: 22px;
}

.card-desc {
  margin: 12px 0 0;
}

.card-meta {
  margin-top: 18px;
  color: #cbd5e1;
  font-size: 14px;
}

.empty-state {
  text-align: center;
}

.sub-nav {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  margin-bottom: 20px;
  color: var(--muted);
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: #c4fff7;
}

.content-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 18px;
  margin-top: 24px;
}

.content-card {
  border-radius: 24px;
  padding: 24px;
}

.meta-list {
  margin: 14px 0 0;
  padding-left: 20px;
}

@media (max-width: 768px) {
  .site-shell,
  .page-shell {
    width: min(100% - 20px, 100%);
    padding: 20px 0 36px;
  }

  .hero,
  .sub-hero,
  .panel,
  .content-card,
  .card {
    border-radius: 20px;
  }

  .hero,
  .sub-hero {
    padding: 24px;
  }

  .toolbar,
  .toolbar-right,
  .sub-nav {
    flex-direction: column;
    align-items: stretch;
  }

  .search-box {
    min-width: 100%;
  }
}