@charset "UTF-8";

:root {
  --bg: #f5f7fa;
  --bg-card: #fff;
  --bg-header: rgba(255,255,255,0.85);
  --bg-tag: #eef1f7;
  --bg-search: #fff;
  --bg-toggle: #e8ecf2;
  --text: #1a1a2e;
  --text-secondary: #555;
  --text-muted: #999;
  --border: #e2e6ee;
  --shadow-hover: 0 6px 16px rgba(0,0,0,0.1);
  --accent: #6c5ce7;
  --accent-light: #a29bfe;
  --gradient: linear-gradient(135deg, #6c5ce7, #00b894, #00cec9);
  --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
  --bg: #0f0f1a;
  --bg-card: #1a1a2e;
  --bg-header: rgba(15,15,26,0.92);
  --bg-tag: #252540;
  --bg-search: #1a1a2e;
  --bg-toggle: #252540;
  --text: #e8e8f0;
  --text-secondary: #b0b0c0;
  --text-muted: #6a6a80;
  --border: #2a2a40;
  --shadow-hover: 0 6px 16px rgba(108,92,231,0.12);
  --accent: #a29bfe;
  --accent-light: #6c5ce7;
  --gradient: linear-gradient(135deg, #a29bfe, #00cec9, #55efc4);
}

*{margin:0;padding:0;box-sizing:border-box}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.45;
  transition: background var(--transition), color var(--transition);
  min-height: 100vh;
}

.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg-header);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  max-width: 1400px;
  margin: 0 auto;
  padding: 10px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  flex-shrink: 0;
}

.logo-icon {
  width: 40px;
  height: 40px;
  border-radius: 8px;
  background: var(--gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.logo-text {
  font-size: 20px;
  font-weight: 800;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.logo-sub {
  font-size: 11px;
  color: var(--text-muted);
  letter-spacing: 1px;
  margin-left: 2px;
}

.search-wrap {
  flex: 1;
  max-width: 420px;
  position: relative;
}

.search-input {
  width: 100%;
  padding: 8px 12px 8px 36px;
  border: 2px solid var(--border);
  border-radius: 18px;
  background: var(--bg-search);
  color: var(--text);
  font-size: 13px;
  outline: none;
  transition: all var(--transition);
}

.search-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(108,92,231,0.12);
}

.search-input::placeholder{color:var(--text-muted)}

.search-icon {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 15px;
  color: var(--text-muted);
  pointer-events: none;
}

.header-actions{display:flex;align-items:center;gap:8px}

.theme-toggle {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--bg-toggle);
  cursor: pointer;
  font-size: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
}

.theme-toggle:hover{transform:rotate(20deg)}

.nav-categories {
  max-width: 1400px;
  margin: 0 auto;
  padding: 5px 16px;
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
  border-top: 1px solid var(--border);
}

.nav-cat {
  padding: 5px 14px;
  border-radius: 14px;
  border: 1px solid transparent;
  background: var(--bg-tag);
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 13px;
  white-space: nowrap;
  transition: all var(--transition);
  text-decoration: none;
}

.nav-cat:hover,.nav-cat.active{background:var(--accent);color:#fff;border-color:var(--accent)}
.nav-cat.nav-tags{border:1px dashed var(--accent-light)}

.sub-nav {
  max-width: 1400px;
  margin: 0 auto;
  padding: 3px 12px;
  display: flex;
  gap: 3px;
  flex-wrap: wrap;
  border-top: 1px solid var(--border);
  background: var(--bg-header);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.sub-nav-link {
  padding: 4px 12px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--bg-tag);
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 12px;
  white-space: nowrap;
  transition: all var(--transition);
  text-decoration: none;
}

.sub-nav-link:hover{color:var(--accent);border-color:var(--accent)}
.sub-nav-link .sn-count{font-size:9px;opacity:.6;margin-left:2px}

.main{max-width:1400px;margin:0 auto;padding:8px 12px 14px}

.section{margin-top:10px;animation:fadeInUp .35s ease both;content-visibility:auto;contain-intrinsic-size:0 500px}

@keyframes fadeInUp{
  from{opacity:0;transform:translateY(12px)}
  to{opacity:1;transform:translateY(0)}
}

.section-header{display:flex;align-items:center;gap:5px;margin-bottom:6px}
.section-icon{font-size:20px}
.section-title{font-size:17px;font-weight:700}

.section-count {
  font-size: 10px;
  color: var(--text-muted);
  background: var(--bg-tag);
  padding: 1px 7px;
  border-radius: 5px;
}

.sub-section{margin-bottom:8px}

.sub-heading {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 5px;
  padding: 2px 7px;
  background: var(--bg-tag);
  border-radius: 4px;
  display: inline-block;
  scroll-margin-top: 110px;
}

.sub-heading .sub-count{font-size:10px;font-weight:400;color:var(--text-muted);margin-left:3px}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 6px;
  content-visibility: auto;
  contain-intrinsic-size: 0 90px;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 7px;
  padding: 8px;
  text-decoration: none;
  color: inherit;
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
  gap: 4px;
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: var(--gradient);
  opacity: 0;
  transition: opacity var(--transition);
}

.card:hover{border-color:var(--accent);box-shadow:var(--shadow-hover);transform:translateY(-1px)}
.card:hover::before{opacity:1}

.card-top{display:flex;align-items:flex-start;gap:5px}

.card-icon {
  width: 24px;
  height: 24px;
  border-radius: 5px;
  background: var(--bg-tag);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  flex-shrink: 0;
}

.card-info{flex:1;min-width:0}
.card-name{font-size:12px;font-weight:600;line-height:1.3}

.card-desc {
  font-size: 10px;
  margin-top: 1px;
  color: var(--text-muted);
  line-height: 1.3;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-tags{display:flex;gap:3px;flex-wrap:wrap}
.card-tag{font-size:9px;padding:1px 4px;border-radius:5px;background:var(--bg-tag);color:var(--text-muted)}

.card-link-hint{font-size:9px;color:var(--accent-light);display:flex;align-items:center;gap:2px;margin-top:auto}

.tag-selector {
  display: flex;
  gap: 3px;
  flex-wrap: wrap;
  padding: 6px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 7px;
}

.tag-btn {
  padding: 3px 10px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--bg-tag);
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 11px;
  white-space: nowrap;
  transition: all var(--transition);
  user-select: none;
}

.tag-btn:hover{color:var(--accent);border-color:var(--accent);transform:translateY(-1px);box-shadow:0 2px 6px rgba(108,92,231,0.12)}

.tag-result-header{display:flex;align-items:center;gap:5px;margin-bottom:8px;flex-wrap:wrap}

.tag-result-title {
  font-size: 13px;
  font-weight: 700;
  padding: 4px 8px;
  background: var(--gradient);
  color: #fff;
  border-radius: 6px;
  display: inline-block;
}

.tag-result-title .result-count{font-size:11px;font-weight:400;opacity:.85;margin-left:3px}

.back-to-tags {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  padding: 3px 8px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--bg-tag);
  color: var(--accent);
  cursor: pointer;
  font-size: 10px;
  transition: all var(--transition);
}

.back-to-tags:hover{background:var(--accent);color:#fff;border-color:var(--accent)}

.footer{border-top:1px solid var(--border);padding:8px 12px;text-align:center}
.footer-text{font-size:10px;color:var(--text-muted)}

.footer-gradient {
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-weight: 700;
}

.to-top {
  position: fixed;
  bottom: 16px;
  right: 16px;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  border: none;
  cursor: pointer;
  font-size: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transform: translateY(12px);
  transition: all var(--transition);
  z-index: 50;
  box-shadow: 0 3px 10px rgba(108,92,231,0.25);
}

.to-top.visible{opacity:1;pointer-events:auto;transform:translateY(0)}

.no-results{text-align:center;padding:20px;color:var(--text-muted);font-size:13px}

@media(max-width:768px){
  .header-inner{flex-wrap:wrap;gap:6px}
  .search-wrap{order:3;flex:1 1 100%;max-width:100%}
  .card-grid{grid-template-columns:repeat(auto-fill, minmax(180px, 1fr))}
  .sub-heading{scroll-margin-top:120px}
  .nav-categories{
    flex-wrap:nowrap;
    overflow-x:auto;
    -webkit-overflow-scrolling:touch;
    scrollbar-width:none;
    padding:5px 8px;
  }
  .nav-categories::-webkit-scrollbar{display:none}
  .sub-nav{
    flex-wrap:nowrap;
    overflow-x:auto;
    -webkit-overflow-scrolling:touch;
    scrollbar-width:none;
    padding:3px 8px;
  }
  .sub-nav::-webkit-scrollbar{display:none}
}

@media(max-width:480px){
  .main{padding:6px 5px 10px}
  .card-grid{grid-template-columns:1fr}
}