/**
 * 知周实验室 · 极深蓝暗色主题
 */
:root {
  --bg-deep: #010818;
  --bg: #020d1f;
  --surface: #0a1628;
  --surface-2: #0f1f38;
  --surface-hover: #132a4a;
  --border: #1a3358;
  --border-light: rgba(94, 140, 210, 0.22);
  --text: #e4ecf7;
  --text-muted: #8fa3c4;
  --text-dim: #5c7294;
  --accent: #5eb3ff;
  --accent-hover: #8ccaff;
  --accent-2: #4f7cff;
  --brand: #7ec8ff;
  --price: #fbbf24;
  --price-soft: #fcd34d;
  --success: #34d399;
  --success-bg: rgba(52, 211, 153, 0.12);
  --draft-bg: rgba(143, 163, 196, 0.1);
  --danger: #f87171;
  --danger-bg: rgba(248, 113, 113, 0.12);
  --shadow: 0 8px 32px rgba(0, 8, 24, 0.55);
  --glow: 0 0 24px rgba(94, 179, 255, 0.08);
}

* { box-sizing: border-box; border-radius: 0 !important; }

body {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  margin: 0;
  color: var(--text);
  background-color: var(--bg-deep);
  background-image:
    radial-gradient(ellipse 100% 60% at 50% -10%, rgba(30, 64, 120, 0.45) 0%, transparent 55%),
    radial-gradient(ellipse 80% 50% at 100% 100%, rgba(15, 40, 90, 0.35) 0%, transparent 50%),
    linear-gradient(180deg, var(--bg-deep) 0%, #00040c 100%);
  background-attachment: fixed;
  min-height: 100vh;
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); text-decoration: underline; }

header {
  background: rgba(6, 14, 32, 0.92);
  border-bottom: 1px solid var(--border);
  padding: 14px 16px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: var(--glow);
}

header .wrap {
  max-width: 1000px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

header a.brand,
header .brand {
  color: var(--brand);
  text-decoration: none;
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: 0.02em;
}

header .crumb,
header .gray,
.counts {
  color: var(--text-muted);
  font-size: 13px;
}

.container {
  max-width: 1000px;
  margin: 20px auto;
  padding: 0 16px 32px;
}

/* 工具栏 / 筛选 */
.toolbar {
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 12px;
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
  box-shadow: var(--shadow);
}

.toolbar input[type="text"],
.toolbar select,
input[type="text"],
input[type="password"],
select {
  padding: 9px 10px;
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--text);
  min-width: 160px;
}

.toolbar input[type="text"]::placeholder { color: var(--text-dim); }

.toolbar input:focus,
.toolbar select:focus,
input:focus,
select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(94, 179, 255, 0.2);
}

/* 按钮 */
a.btn, button.btn, .btn {
  background: linear-gradient(180deg, #3b82f6 0%, #2563eb 100%);
  color: #fff;
  text-decoration: none;
  border: 1px solid #3b6fd4;
  padding: 9px 14px;
  cursor: pointer;
  display: inline-block;
  font-size: 14px;
  transition: background 0.15s, box-shadow 0.15s;
}

a.btn:hover, button.btn:hover, .btn:hover {
  background: linear-gradient(180deg, #60a5fa 0%, #3b82f6 100%);
  box-shadow: 0 4px 16px rgba(59, 130, 246, 0.35);
  text-decoration: none;
  color: #fff;
}

a.btn.secondary, button.btn.secondary, .btn.secondary {
  background: var(--surface-2);
  border-color: var(--border);
  color: var(--text-muted);
}

a.btn.secondary:hover, button.btn.secondary:hover, .btn.secondary:hover {
  background: var(--surface-hover);
  color: var(--text);
  box-shadow: none;
}

.btn[disabled], .disabled {
  opacity: 0.45;
  cursor: not-allowed;
  pointer-events: none;
}

/* 徽标 */
.badge {
  display: inline-block;
  padding: 2px 8px;
  font-size: 12px;
  border: 1px solid transparent;
}

.badge.published {
  background: var(--success-bg);
  color: var(--success);
  border-color: rgba(52, 211, 153, 0.35);
}

.badge.draft {
  background: var(--draft-bg);
  color: var(--text-muted);
  border-color: var(--border-light);
}

.badge.proto {
  background: rgba(79, 124, 255, 0.18);
  color: #93b4ff;
  border-color: rgba(79, 124, 255, 0.4);
}

/* 列表卡片 */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 14px;
  margin-top: 14px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow);
  transition: border-color 0.2s, transform 0.2s, box-shadow 0.2s;
}

.card:hover {
  border-color: var(--border-light);
  box-shadow: var(--shadow), var(--glow);
}

.card .cover {
  height: 180px;
  background: var(--surface-2);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.card .cover img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center;
  display: block;
}

.card .cover > a {
  display: flex;
  width: 100%;
  height: 100%;
  align-items: center;
  justify-content: center;
}

.card .body {
  padding: 12px;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.title {
  font-weight: 600;
  line-height: 1.35;
  margin: 0;
  color: var(--text);
}

.gray {
  color: var(--text-muted);
  font-size: 13px;
}

.price {
  color: var(--price);
  font-weight: 700;
}

.card .actions {
  display: flex;
  gap: 8px;
  margin-top: auto;
  flex-wrap: wrap;
}

/* 分页 */
.pager {
  margin: 18px 0;
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
}

.pager a {
  padding: 7px 12px;
  border: 1px solid var(--border);
  background: var(--surface);
  text-decoration: none;
  color: var(--text-muted);
}

.pager a:hover {
  background: var(--surface-hover);
  color: var(--accent);
  border-color: var(--border-light);
}

.pager .current {
  padding: 7px 12px;
  border: 1px solid var(--accent);
  background: rgba(94, 179, 255, 0.12);
  color: var(--accent);
}

/* 详情页 */
.hero {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 16px;
  align-items: start;
}

.meta h1 {
  margin: 0 0 8px;
  font-size: 22px;
  color: var(--text);
}

.badges {
  display: flex;
  gap: 8px;
  margin: 6px 0 2px;
}

.badges .badge {
  background: rgba(94, 179, 255, 0.15);
  color: var(--accent);
  border-color: rgba(94, 179, 255, 0.35);
}

.kv {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 6px;
  font-size: 13px;
  margin-top: 8px;
}

.kv .k { color: var(--text-muted); }
.kv .v, .kv .l { color: var(--text); }

.kl {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 6px;
  font-size: 16px;
  margin-top: 8px;
  color: var(--text-muted);
}

.km {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 6px;
  font-size: 16px;
  margin-top: 8px;
  color: var(--price);
  font-weight: 700;
}

.buy {
  margin-top: 12px;
  border: 1px solid var(--border);
  background: var(--surface-2);
  padding: 12px;
}

.section { margin-top: 18px; }

.section h3 {
  margin: 0 0 10px;
  font-size: 16px;
  color: var(--text);
}

.thumb {
  border: 1px solid var(--border);
  padding: 6px;
  text-align: center;
  background: var(--surface-2);
}

.thumb img {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 0 auto;
}

.footer {
  color: var(--text-dim);
  font-size: 12px;
  text-align: center;
  padding: 24px;
}

.actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 8px;
  align-items: center;
}

.actions form { display: inline; }

.video-wrap video {
  width: 100%;
  max-height: 420px;
}

.empty-box {
  grid-column: 1 / -1;
  padding: 20px;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-muted);
}

@media (max-width: 820px) {
  .hero { grid-template-columns: 1fr; }
  .kv { grid-template-columns: 100px 1fr; }
}