:root {
  --bg: #0a0a0f;
  --bg-panel: #13131a;
  --bg-panel-2: #1a1a24;
  --bg-elev: #202030;
  --border: #2a2a3a;
  --border-hi: #3a3a50;
  --text: #f0f2fa;
  --text-dim: #b0b6c8;
  --text-mute: #7a8095;
  --accent: #6366f1;
  --accent-2: #8b5cf6;
  --accent-3: #a78bfa;
  --accent-soft: rgba(99, 102, 241, 0.12);
  --accent-glow: rgba(99, 102, 241, 0.35);
  --success: #4ade80;
  --gold: #fbbf24;
  --silver: #cbd5e1;
  --bronze: #d97706;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: "Inter", -apple-system, "Segoe UI", "Microsoft YaHei", system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  letter-spacing: 0.01em;
  font-size: 15px;
}

/* ============ 导航栏 ============ */
.nav {
  display: flex;
  align-items: center;
  gap: 32px;
  padding: 14px 32px;
  border-bottom: 1px solid var(--border);
  background: rgba(19,19,26,0.85);
  backdrop-filter: blur(12px);
  position: sticky;
  top: 0;
  z-index: 100;
}
.nav-logo {
  font-size: 18px;
  font-weight: 800;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, var(--accent-3), var(--accent-2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-decoration: none;
  flex-shrink: 0;
}
.nav-links {
  display: flex;
  gap: 4px;
  flex: 1;
}
.nav-link {
  color: var(--text-dim);
  text-decoration: none;
  font-size: 14px;
  font-weight: 600;
  padding: 8px 14px;
  border-radius: 8px;
  transition: all 0.15s;
  white-space: nowrap;
}
.nav-link:hover {
  color: var(--text);
  background: var(--bg-panel);
}
.nav-link.active {
  color: var(--accent-3);
  background: var(--accent-soft);
}
.nav-search {
  display: flex;
  gap: 6px;
  padding: 4px 4px 4px 14px;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 999px;
  min-width: 220px;
  max-width: 280px;
  transition: border-color 0.15s, box-shadow 0.15s;
  flex-shrink: 0;
}
.nav-search:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.nav-search input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: var(--text);
  font-size: 13px;
  font-family: inherit;
  min-width: 0;
}
.nav-search input::placeholder { color: var(--text-mute); }
.nav-search button {
  padding: 7px 14px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border: none;
  border-radius: 999px;
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
  transition: box-shadow 0.2s;
  flex-shrink: 0;
}
.nav-search button:hover { box-shadow: 0 4px 14px var(--accent-glow); }
.nav-signin {
  padding: 9px 18px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border: none;
  border-radius: 8px;
  color: #fff;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  font-family: inherit;
  transition: box-shadow 0.2s;
  flex-shrink: 0;
}
.nav-signin:hover { box-shadow: 0 4px 18px var(--accent-glow); }

/* 移动端折叠 */
@media (max-width: 900px) {
  .nav { padding: 12px 16px; gap: 16px; flex-wrap: wrap; }
  .nav-links { order: 3; flex-basis: 100%; flex-wrap: wrap; }
  .nav-search { max-width: none; flex: 1; }
}

/* ============ 通用容器 ============ */
.container {
  max-width: 1180px;
  margin: 0 auto;
  padding: 32px 24px 80px;
}
.page-title {
  font-size: 28px;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 6px;
}
.page-sub {
  font-size: 14px;
  color: var(--text-mute);
  margin-bottom: 28px;
}

/* ============ 状态 ============ */
.status-msg {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-dim);
  font-size: 15px;
}
.status-msg.error { color: #f87171; }
.spinner {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 2px solid rgba(99,102,241,0.2);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  vertical-align: middle;
  margin-right: 12px;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ============ 卡片 / 面板 ============ */
.panel {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 14px;
  overflow: hidden;
}