/* ── 顶部导航栏 ──────────────────────────────────────────────────────────── */
.top-nav {
  background: var(--color-brand);
  color: #fff;
  padding: 0 24px;
  display: flex;
  align-items: center;
  height: 56px;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: var(--shadow-nav);
  flex-shrink: 0;
}

.nav-brand {
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  text-decoration: none;
  margin-right: 40px;
  white-space: nowrap;
}

.nav-brand:hover { text-decoration: none; color: #fff; }

.nav-links {
  display: flex;
  gap: 4px;
  flex: 1;
  align-items: center;
  overflow-x: auto;
}

.nav-link {
  color: rgba(255,255,255,0.85);
  text-decoration: none;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  transition: background 0.2s, color 0.2s;
  white-space: nowrap;
  flex-shrink: 0;
}

.nav-link:hover,
.nav-link.active {
  background: rgba(255,255,255,0.15);
  color: #fff;
  text-decoration: none;
}

.nav-logout {
  margin-left: auto;
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.3);
  color: rgba(255,255,255,0.9);
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  cursor: pointer;
  transition: background 0.2s;
  white-space: nowrap;
  flex-shrink: 0;
}

.nav-logout:hover {
  background: rgba(255,255,255,0.2);
}

/* ── 容器 ────────────────────────────────────────────────────────────────── */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 24px 20px;
  width: 100%;
}

.container-narrow {
  max-width: 900px;
  margin: 0 auto;
  padding: 24px 20px;
  width: 100%;
}

/* ── 页面标题区 ──────────────────────────────────────────────────────────── */
.page-header {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: 24px 32px;
  margin-bottom: 24px;
  box-shadow: var(--shadow-card);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.page-header h1 {
  font-size: 22px;
  font-weight: 700;
  color: var(--color-brand);
}

.page-header p {
  font-size: 14px;
  color: var(--color-text-muted);
  margin-top: 4px;
}

/* ── 分页栏 ──────────────────────────────────────────────────────────────── */
.pagination-bar {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
  padding: 20px;
  border-top: 1px solid #f0f0f0;
  flex-wrap: wrap;
}

.page-btn {
  padding: 7px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  font-size: 13px;
  cursor: pointer;
  transition: background 0.2s, color 0.2s, border-color 0.2s;
  color: #555;
}

.page-btn:hover:not(:disabled) {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}

.page-btn.active {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
  font-weight: 600;
}

.page-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.page-info {
  font-size: 13px;
  color: var(--color-text-muted);
  padding: 0 4px;
}

/* ── 页脚 ────────────────────────────────────────────────────────────────── */
.site-footer {
  background: var(--color-brand);
  color: rgba(255,255,255,0.6);
  text-align: center;
  padding: 16px 24px;
  font-size: 13px;
  flex-shrink: 0;
}

/* ── 筛选栏 ──────────────────────────────────────────────────────────────── */
.filter-bar {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  align-items: center;
  padding: 16px 20px;
  border-bottom: 1px solid #f0f0f0;
}

.filter-bar select,
.filter-bar input[type="text"] {
  padding: 7px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 13px;
  outline: none;
  background: var(--color-surface);
  color: var(--color-text);
  transition: border-color 0.2s;
}

.filter-bar select:focus,
.filter-bar input[type="text"]:focus {
  border-color: var(--color-primary);
}

/* ── 响应式 ──────────────────────────────────────────────────────────────── */
@media (max-width: 900px) {
  .nav-brand { margin-right: 16px; }
  .nav-link  { padding: 8px 10px; font-size: 13px; }
  .page-header { padding: 16px 20px; }
  .container, .container-narrow { padding: 16px; }
}

@media (max-width: 600px) {
  .top-nav { padding: 0 12px; }
  .nav-brand { font-size: 15px; margin-right: 8px; }
  .page-header h1 { font-size: 18px; }
  .tab-btn { padding: 12px 14px; font-size: 13px; }
}