:root {
  --bg: #eef2f7;
  --card-bg: #ffffff;
  --text: #1f2937;
  --text-soft: #6b7280;
  --primary: #2563eb;
  --accent: #7c3aed;
  --primary-soft: #dbeafe;
  --border: #e5e7eb;
  --shadow: 0 6px 18px -6px rgba(37, 99, 235, 0.16);
  --shadow-hover: 0 18px 40px -10px rgba(37, 99, 235, 0.28);
  --radius: 14px;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* 背景装饰光斑 */
.bg-decor {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(900px 480px at 8% -6%, rgba(37, 99, 235, 0.10), transparent 60%),
    radial-gradient(800px 460px at 100% -4%, rgba(124, 58, 237, 0.10), transparent 55%);
}

/* ---------- 顶栏导航 ---------- */
.topnav {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 12px 24px;
  display: flex;
  align-items: center;
  gap: 18px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 17px;
  font-weight: 800;
  text-decoration: none;
  color: var(--text);
  white-space: nowrap;
}
.brand-logo {
  font-size: 20px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.nav-search {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 10px;
  max-width: 520px;
  margin: 0 auto;
  padding: 10px 16px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 999px;
  box-shadow: var(--shadow);
  transition: border-color .2s, box-shadow .2s;
}
.nav-search:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px var(--primary-soft);
}
.search-icon { opacity: .55; }
.nav-search input {
  border: none;
  outline: none;
  background: transparent;
  font-size: 15px;
  width: 100%;
  color: var(--text);
}
.nav-wx {
  font-family: 'SF Mono', 'Courier New', monospace;
  font-weight: 700;
  font-size: 13px;
  color: var(--primary);
  background: linear-gradient(135deg, #eff6ff, #dbeafe);
  border: 1.5px dashed #60a5fa;
  border-radius: 8px;
  padding: 6px 12px;
  cursor: pointer;
  white-space: nowrap;
  transition: transform .2s;
}
.nav-wx:hover { transform: translateY(-1px); }

/* ---------- 横向分类条 ---------- */
.catbar {
  position: sticky;
  top: 62px;
  z-index: 30;
  background: rgba(238, 242, 247, 0.9);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--border);
}
.chips {
  max-width: 1200px;
  margin: 0 auto;
  padding: 12px 24px;
  display: flex;
  gap: 10px;
  overflow-x: auto;
  scrollbar-width: none;
}
.chips::-webkit-scrollbar { display: none; }
.chip {
  flex: 0 0 auto;
  padding: 7px 16px;
  border: 1px solid var(--border);
  background: #fff;
  color: var(--text-soft);
  border-radius: 999px;
  cursor: pointer;
  font-size: 14px;
  transition: all .18s;
}
.chip:hover { color: var(--text); border-color: #cdd3e0; }
.chip.active {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-color: transparent;
  color: #fff;
  box-shadow: 0 6px 16px rgba(37, 99, 235, 0.3);
}

/* ---------- 卡片墙（响应式网格，横向铺开） ---------- */
.container {
  max-width: 1200px;
  width: 100%;
  margin: 28px auto 0;
  padding: 0 24px 32px;
  flex: 1 0 auto;
}
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}
.card {
  position: relative;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  cursor: pointer;
  box-shadow: var(--shadow);
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
  display: flex;
  flex-direction: column;
  min-height: 176px;
  overflow: hidden;
  animation: fade-up .4s ease both;
}
.card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  opacity: 0;
  transition: opacity .2s;
}
.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
  border-color: transparent;
}
.card:hover::before { opacity: 1; }
.card:active { transform: translateY(-2px) scale(.995); }

@keyframes fade-up {
  from { opacity: 0; transform: translateY(14px); }
  to   { opacity: 1; transform: translateY(0); }
}

.card-top { display: flex; align-items: center; justify-content: space-between; }
.card-icon {
  width: 52px; height: 52px;
  display: grid; place-items: center;
  border-radius: 14px;
  font-size: 26px;
  line-height: 1;
}
.card-cat {
  font-size: 12px;
  color: var(--text-soft);
  background: #f3f4f8;
  padding: 4px 10px;
  border-radius: 999px;
}
.card-tag {
  font-size: 12px;
  font-weight: 600;
  color: #ea580c;
  background: #fff1e7;
  padding: 4px 10px;
  border-radius: 999px;
}
.badge-online {
  font-size: 12px;
  font-weight: 600;
  color: #16a34a;
  background: #dcfce7;
  padding: 4px 10px;
  border-radius: 999px;
}
.card-name { margin-top: 16px; font-size: 18px; font-weight: 700; }
.card-desc {
  margin-top: 8px;
  color: var(--text-soft);
  font-size: 14px;
  line-height: 1.6;
  flex: 1;
}
.card-foot {
  margin-top: 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.card-go {
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.card-go.muted { color: var(--text-soft); font-weight: 500; }
.arrow { transition: transform .2s; }
.card:hover .arrow { transform: translateX(4px); }
.badge-todo {
  font-size: 11px;
  color: #b45309;
  background: #fef3c7;
  padding: 3px 9px;
  border-radius: 999px;
}

.empty { text-align: center; color: var(--text-soft); padding: 60px 0; font-size: 15px; }

/* ---------- 页脚（始终居中） ---------- */
.contact-footer,
.beian-footer {
  width: 100%;
  text-align: center;
}
.contact-footer {
  flex-shrink: 0;
  font-size: 13px;
  color: var(--text-soft);
  padding: 18px 0 4px;
}
.contact-footer .wx {
  color: var(--primary);
  font-family: 'SF Mono', 'Courier New', monospace;
  font-weight: 700;
  cursor: pointer;
}
.beian-footer {
  flex-shrink: 0;
  font-size: 12px;
  color: var(--text-soft);
  line-height: 1.9;
  padding: 4px 0 32px;
}
.beian-footer a {
  color: var(--text-soft);
  text-decoration: none;
  margin: 0 6px;
}
.beian-footer a:hover { color: var(--primary); text-decoration: underline; }
.beian-footer .sep { color: #d1d5db; }

/* ---------- Toast ---------- */
.toast {
  position: fixed;
  left: 50%;
  bottom: 36px;
  transform: translateX(-50%) translateY(20px);
  background: #1f2937;
  color: #fff;
  padding: 12px 20px;
  border-radius: 12px;
  font-size: 14px;
  box-shadow: 0 10px 30px rgba(0,0,0,.25);
  opacity: 0;
  transition: opacity .25s, transform .25s;
  z-index: 50;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

@media (max-width: 640px) {
  .grid { grid-template-columns: 1fr; }
  .nav-wx { display: none; }
  .nav-inner { gap: 12px; padding: 10px 16px; }
  .beian-footer { font-size: 11px; padding: 4px 12px 24px; }
  .beian-footer a { display: inline-block; margin: 0 4px; }
  .contact-footer { padding: 14px 12px 4px; }
}