/* ========================================
   HEAD acoustics B站操作汇总 - 主题样式
   默认浅色，支持深色切换
   ======================================== */

/* ---- 浅色主题（默认）---- */
:root {
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-card: #ffffff;
  --bg-navbar: rgba(255, 255, 255, 0.85);
  --border-color: #e2e8f0;
  --border-color-strong: #cbd5e1;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --accent: #00a3d9;
  --accent-dim: rgba(0, 163, 217, 0.08);
  --accent-glow: rgba(0, 163, 217, 0.2);
  --card-shadow: 0 1px 3px rgba(0, 0, 0, 0.04), 0 1px 2px rgba(0, 0, 0, 0.03);
  --card-shadow-hover: 0 4px 16px rgba(0, 0, 0, 0.08), 0 2px 4px rgba(0, 0, 0, 0.04);
  --danger: #ef4444;
  --success: #10b981;
  --radius: 12px;
  --radius-sm: 8px;
  --transition: all 0.25s ease;
}

/* ---- 深色主题 ---- */
[data-theme="dark"] {
  --bg-primary: #0a0e1a;
  --bg-secondary: #111827;
  --bg-card: #161b2e;
  --bg-navbar: rgba(10, 14, 26, 0.85);
  --border-color: #2a3454;
  --border-color-strong: #3d4a75;
  --text-primary: #e2e8f0;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --accent: #00d4ff;
  --accent-dim: rgba(0, 212, 255, 0.1);
  --accent-glow: rgba(0, 212, 255, 0.25);
  --card-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
  --card-shadow-hover: 0 8px 24px rgba(0, 0, 0, 0.35);
}

/* ---- Reset ---- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  transition: background 0.3s ease, color 0.3s ease;
}

/* ---- 背景装饰 ---- */
body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image:
    linear-gradient(rgba(0, 163, 217, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 163, 217, 0.025) 1px, transparent 1px);
  background-size: 50px 50px;
  pointer-events: none;
  z-index: 0;
}

[data-theme="dark"] body::before {
  background-image:
    linear-gradient(rgba(0, 212, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 212, 255, 0.03) 1px, transparent 1px);
}

/* ========================================
   布局容器
   ======================================== */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

/* ========================================
   顶部导航
   ======================================== */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg-navbar);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  padding: 12px 0;
  transition: background 0.3s ease, border-color 0.3s ease;
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

/* Logo 图标 */
.nav-logo {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
}

.nav-logo-img {
  width: 36px;
  height: 36px;
  object-fit: contain;
  border-radius: 6px;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* 主题切换按钮 */
.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: 1px solid var(--border-color);
  border-radius: 50%;
  background: var(--bg-card);
  cursor: pointer;
  transition: var(--transition);
  padding: 0;
}

.theme-toggle:hover {
  border-color: var(--accent);
  background: var(--accent-dim);
  transform: scale(1.05);
}

.theme-icon {
  font-size: 16px;
  line-height: 1;
  display: block;
}

.nav-back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 14px;
  transition: var(--transition);
  white-space: nowrap;
}

.nav-back:hover {
  color: var(--accent);
}

/* ========================================
   搜索栏
   ======================================== */
.search-wrap {
  padding: 40px 0 28px;
  text-align: center;
}

.search-title {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 24px;
  background: linear-gradient(135deg, var(--accent), #7dd3fc);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.search-box {
  position: relative;
  max-width: 500px;
  margin: 0 auto;
}

.search-box input {
  width: 100%;
  padding: 12px 16px 12px 44px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  color: var(--text-primary);
  font-size: 15px;
  outline: none;
  transition: var(--transition);
  box-shadow: var(--card-shadow);
}

.search-box input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-dim), var(--card-shadow);
}

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

.search-box .search-icon {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 18px;
}

/* ========================================
   首页 - 分组区块 + 链接网格
   ======================================== */
.group-section {
  margin-bottom: 40px;
}

.group-section-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-color);
}

.group-section-icon {
  font-size: 22px;
  line-height: 1;
}

.group-section-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
  flex: 1;
}

.group-section-count {
  font-size: 12px;
  color: var(--text-muted);
  white-space: nowrap;
}

.link-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 12px;
}

.link-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 14px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  text-decoration: none;
  color: var(--text-primary);
  transition: var(--transition);
  box-shadow: var(--card-shadow);
}

.link-card:hover {
  border-color: var(--accent);
  background: var(--accent-dim);
  transform: translateY(-2px);
  box-shadow: var(--card-shadow-hover);
}

.link-card.empty {
  opacity: 0.5;
  cursor: default;
}

.link-card.empty:hover {
  border-color: var(--border-color);
  background: var(--bg-card);
  transform: none;
  box-shadow: var(--card-shadow);
}

.link-card-title {
  font-size: 14px;
  font-weight: 500;
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ========================================
   分组详情 - 链接列表
   ======================================== */
.link-list {
  padding-bottom: 48px;
}

.link-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  text-decoration: none;
  color: var(--text-primary);
  transition: var(--transition);
  margin-bottom: 10px;
  box-shadow: var(--card-shadow);
}

.link-item:hover {
  border-color: var(--accent);
  background: var(--accent-dim);
  transform: translateX(4px);
}

.link-item .link-title {
  font-size: 15px;
  font-weight: 500;
  flex: 1;
}

.link-item .link-arrow {
  color: var(--text-muted);
  font-size: 18px;
  transition: var(--transition);
}

.link-item:hover .link-arrow {
  color: var(--accent);
}

.link-badge {
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 4px;
  background: var(--accent-dim);
  color: var(--accent);
  white-space: nowrap;
}

.link-badge.empty {
  background: rgba(100, 116, 139, 0.15);
  color: var(--text-muted);
}

/* 搜索结果高亮 */
.link-item.search-match .link-title mark,
.link-card.search-match .link-card-title mark {
  background: var(--accent-dim);
  color: var(--accent);
  border-radius: 2px;
  padding: 0 2px;
}

/* ========================================
   空状态
   ======================================== */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-muted);
}

.empty-state .empty-icon {
  font-size: 48px;
  margin-bottom: 16px;
  opacity: 0.5;
}

/* ========================================
   Footer
   ======================================== */
.footer {
  text-align: center;
  padding: 32px 0;
  border-top: 1px solid var(--border-color);
  color: var(--text-muted);
  font-size: 13px;
}

/* ========================================
   Admin 页面样式
   ======================================== */
.admin-login {
  max-width: 360px;
  margin: 100px auto;
  text-align: center;
}

.admin-login input {
  width: 100%;
  padding: 12px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 15px;
  outline: none;
  margin-bottom: 12px;
  text-align: center;
}

.admin-login input:focus {
  border-color: var(--accent);
}

.admin-login .btn {
  width: 100%;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 20px;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  font-family: inherit;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}

.btn-primary:hover {
  background: #00b8d9;
  box-shadow: 0 0 16px var(--accent-glow);
}

.btn-secondary {
  background: var(--bg-card);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.btn-danger {
  background: transparent;
  color: var(--danger);
  border: 1px solid rgba(239, 68, 68, 0.3);
}

.btn-danger:hover {
  background: rgba(239, 68, 68, 0.1);
  border-color: var(--danger);
}

.admin-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  margin: 32px 0 24px;
}

.admin-toolbar .toolbar-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.admin-group {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  margin-bottom: 20px;
  overflow: hidden;
}

.admin-group-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-color);
  background: var(--bg-secondary);
}

.admin-group-header input[type="text"] {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-size: 15px;
  font-weight: 600;
  outline: none;
  font-family: inherit;
}

.admin-group-header input[type="text"]::placeholder {
  color: var(--text-muted);
}

.admin-group-body {
  padding: 8px 20px 20px;
}

.admin-link-row {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 0;
  border-bottom: 1px solid var(--border-color);
}

.admin-link-row:last-child {
  border-bottom: none;
}

.admin-link-row input {
  background: var(--bg-secondary);
  border: 1px solid transparent;
  color: var(--text-primary);
  font-size: 14px;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  outline: none;
  font-family: inherit;
  transition: var(--transition);
}

.admin-link-row input:focus {
  border-color: var(--accent);
}

.admin-link-row .input-title {
  flex: 1;
  min-width: 0;
}

.admin-link-row .input-url {
  flex: 2;
  min-width: 0;
}

.admin-link-row .btn-delete {
  flex-shrink: 0;
  padding: 8px 10px;
  font-size: 13px;
}

.admin-add-row {
  margin-top: 12px;
}

.admin-group-footer {
  display: flex;
  gap: 8px;
  padding: 0 20px 16px;
}

/* ---- 拖拽排序 ---- */
.drag-handle {
  flex-shrink: 0;
  cursor: grab;
  color: var(--text-muted, #888);
  font-size: 18px;
  line-height: 1;
  padding: 4px 2px;
  user-select: none;
  transition: color 0.15s;
}
.drag-handle:hover { color: var(--accent); }
.drag-handle:active { cursor: grabbing; }

.drag-handle-group {
  font-size: 20px;
  padding: 6px 4px;
}

.admin-link-row.dragging,
.admin-group.dragging {
  opacity: 0.4;
}

.admin-link-row.drag-above {
  border-top: 2px solid var(--accent) !important;
}
.admin-link-row.drag-below {
  border-bottom: 2px solid var(--accent) !important;
}

.admin-group.drag-above {
  border-top: 3px solid var(--accent) !important;
}
.admin-group.drag-below {
  border-bottom: 3px solid var(--accent) !important;
}

/* ---- 分组图标选择器 ---- */
.group-icon {
  flex-shrink: 0;
  cursor: pointer;
  font-size: 24px;
  line-height: 1;
  padding: 4px 6px;
  border-radius: 8px;
  user-select: none;
  transition: background 0.15s;
}
.group-icon:hover {
  background: var(--bg-secondary);
}

.icon-picker {
  position: absolute;
  z-index: 1000;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
  padding: 12px;
  width: 288px;
}
.icon-picker-grid {
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  gap: 4px;
}
.icon-picker-grid button {
  font-size: 20px;
  padding: 4px;
  background: none;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  line-height: 1;
}
.icon-picker-grid button:hover {
  background: var(--bg-secondary);
}
.icon-picker-custom {
  margin-top: 10px;
  display: flex;
  gap: 6px;
}
.icon-picker-custom input {
  flex: 1;
  background: var(--bg-secondary);
  border: 1px solid transparent;
  color: var(--text-primary);
  font-size: 13px;
  padding: 6px 10px;
  border-radius: 8px;
  outline: none;
}
.icon-picker-custom input:focus {
  border-color: var(--accent);
}

/* 页面标题（替代搜索栏） */
.page-title {
  font-size: 28px;
  font-weight: 800;
  color: var(--text-primary);
  text-align: center;
  padding: 48px 0 28px;
}

/* ========================================
   Tab 栏（模块切换）
   ======================================== */
.tab-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 28px;
  padding-bottom: 16px;
  border-bottom: 2px solid var(--border-color);
}

.tab-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: 10px;
  border: 1px solid var(--border-color);
  background: var(--bg-card);
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}

.tab-item:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.tab-item.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  font-weight: 600;
}

.tab-item.active .tab-icon {
  font-size: 18px;
  line-height: 1;
}

.tab-icon {
  font-size: 18px;
  line-height: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.tab-icon .icon-img,
.module-icon .icon-img {
  width: 24px;
  height: 24px;
  object-fit: contain;
  border-radius: 4px;
  vertical-align: middle;
}

.module-icon .icon-img {
  width: 28px;
  height: 28px;
}

/* 打包下载按钮 */
.module-packall {
  margin: 0 0 16px;
  text-align: right;
}

.dl-btn-packall {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 22px;
  border-radius: var(--radius-sm);
  background: var(--module-accent, var(--accent));
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: var(--transition);
}

.dl-btn-packall:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  filter: brightness(1.08);
}

/* ========================================
   模块区块（下载中心前台）
   ======================================== */
.module-section {
  --module-accent: var(--accent);
  --module-border: var(--border-color);
  background: var(--module-bg, var(--bg-card));
  border: 1px solid var(--module-border);
  border-radius: 16px;
  padding: 22px 24px;
  margin-bottom: 26px;
  transition: background 0.3s ease, border-color 0.3s ease;
}

/* 各颜色主题（浅色） */
.module-section[data-color="blue"]   { --module-bg: #eff8ff; --module-accent: #0284c7; --module-border: rgba(2, 132, 199, 0.22); }
.module-section[data-color="green"]  { --module-bg: #edfaf1; --module-accent: #059669; --module-border: rgba(5, 150, 105, 0.22); }
.module-section[data-color="orange"] { --module-bg: #fff6ea; --module-accent: #d97706; --module-border: rgba(217, 119, 6, 0.22); }
.module-section[data-color="purple"] { --module-bg: #f6f1ff; --module-accent: #7c3aed; --module-border: rgba(124, 58, 237, 0.2); }
.module-section[data-color="teal"]   { --module-bg: #eafaf8; --module-accent: #0d9488; --module-border: rgba(13, 148, 136, 0.22); }
.module-section[data-color="rose"]   { --module-bg: #fff1f3; --module-accent: #e11d48; --module-border: rgba(225, 29, 72, 0.2); }
.module-section[data-color="indigo"] { --module-bg: #eef2ff; --module-accent: #4f46e5; --module-border: rgba(79, 70, 229, 0.2); }
.module-section[data-color="slate"]  { --module-bg: #f4f6fa; --module-accent: #475569; --module-border: rgba(71, 85, 105, 0.25); }

/* 各颜色主题（深色） */
[data-theme="dark"] .module-section[data-color="blue"]   { --module-bg: rgba(0, 163, 217, 0.07); --module-accent: #38bdf8; --module-border: rgba(56, 189, 248, 0.25); }
[data-theme="dark"] .module-section[data-color="green"]  { --module-bg: rgba(16, 185, 129, 0.07); --module-accent: #34d399; --module-border: rgba(52, 211, 153, 0.25); }
[data-theme="dark"] .module-section[data-color="orange"] { --module-bg: rgba(245, 158, 11, 0.07); --module-accent: #fbbf24; --module-border: rgba(251, 191, 36, 0.25); }
[data-theme="dark"] .module-section[data-color="purple"] { --module-bg: rgba(139, 92, 246, 0.09); --module-accent: #a78bfa; --module-border: rgba(167, 139, 250, 0.25); }
[data-theme="dark"] .module-section[data-color="teal"]   { --module-bg: rgba(20, 184, 166, 0.08); --module-accent: #2dd4bf; --module-border: rgba(45, 212, 191, 0.25); }
[data-theme="dark"] .module-section[data-color="rose"]   { --module-bg: rgba(244, 63, 94, 0.08); --module-accent: #fb7185; --module-border: rgba(251, 113, 133, 0.25); }
[data-theme="dark"] .module-section[data-color="indigo"] { --module-bg: rgba(99, 102, 241, 0.09); --module-accent: #818cf8; --module-border: rgba(129, 140, 248, 0.25); }
[data-theme="dark"] .module-section[data-color="slate"]  { --module-bg: rgba(100, 116, 139, 0.1); --module-accent: #94a3b8; --module-border: rgba(148, 163, 184, 0.3); }

.module-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 4px;
}

.module-icon {
  font-size: 24px;
  line-height: 1;
}

.module-title {
  font-size: 19px;
  font-weight: 700;
  color: var(--text-primary);
  flex: 1;
}

.module-count {
  font-size: 12px;
  color: var(--text-muted);
  white-space: nowrap;
}

.module-desc {
  color: var(--text-secondary);
  font-size: 14px;
  margin: 0 0 16px 34px;
}

.module-desc .desc-link {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: var(--transition);
}

.module-desc .desc-link:hover {
  opacity: 0.75;
}

/* 操作指导 Tab：永远靠右 */
.tab-item.tab-guide {
  margin-left: auto;
}

.tab-item.tab-guide .tab-icon {
  font-size: 16px;
}

/* ========================================
   操作指导模块（guide 类型）：步骤卡片
   ======================================== */
.guide-steps {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.guide-step {
  background: var(--bg-card);
  border: 1px solid var(--module-border);
  border-radius: var(--radius);
  padding: 16px 20px;
  transition: var(--transition);
}

.guide-step:hover {
  box-shadow: var(--card-shadow-hover);
}

.guide-step-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}

.guide-step-num {
  flex: none;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--module-accent);
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 700;
}

.guide-step-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  margin: 0;
}

.guide-step-items {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 7px;
}

.guide-step-items li {
  position: relative;
  padding-left: 18px;
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.7;
}

.guide-step-items li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 0.72em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--module-accent);
}

.guide-note {
  margin-top: 12px;
  padding: 10px 14px;
  background: var(--module-bg);
  border-left: 3px solid var(--module-accent);
  border-radius: 6px;
  color: var(--text-secondary);
  font-size: 13px;
  line-height: 1.7;
}

.guide-step .software-list {
  margin-top: 14px;
}

/* 软件列表行：名称在左，下载按钮在右 */
.software-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.software-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 18px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  box-shadow: var(--card-shadow);
  transition: var(--transition);
}

.software-row:hover {
  border-color: var(--module-accent, var(--accent));
}

.software-row.empty {
  opacity: 0.55;
}

.software-name {
  font-size: 14px;
  font-weight: 500;
  flex: 1;
  display: flex;
  align-items: center;
  gap: 8px;
  overflow: hidden;
}

.module-tag {
  flex-shrink: 0;
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 4px;
  background: var(--accent-dim);
  color: var(--accent);
  white-space: nowrap;
}

.dl-btn {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px;
  border-radius: var(--radius-sm);
  background: var(--module-accent, var(--accent));
  color: #fff;
  font-size: 13px;
  font-weight: 600;
  text-decoration: none;
  transition: var(--transition);
}

.dl-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  filter: brightness(1.08);
}

.dl-badge.empty {
  flex-shrink: 0;
  font-size: 11px;
  padding: 4px 10px;
  border-radius: 4px;
  background: rgba(100, 116, 139, 0.15);
  color: var(--text-muted);
}

/* 管理后台：模块背景色选择 */
.color-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}

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

.color-swatches {
  display: inline-flex;
  gap: 6px;
}

.color-swatch {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: 2px solid transparent;
  cursor: pointer;
  transition: var(--transition);
  padding: 0;
}

.color-swatch:hover {
  transform: scale(1.15);
}

.color-swatch.active {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-dim);
}

.search-subtitle {
  color: var(--text-muted);
  font-size: 14px;
  margin: -14px 0 16px;
}

/* ========================================
   响应式
   ======================================== */
@media (max-width: 640px) {
  .container {
    padding: 0 16px;
  }

  .search-title {
    font-size: 22px;
  }

  .module-section {
    padding: 18px 16px;
  }

  .module-desc {
    margin-left: 0;
  }

  .guide-step {
    padding: 14px 14px;
  }

  .guide-note {
    padding: 9px 11px;
  }

  .software-row {
    flex-wrap: wrap;
  }

  .dl-btn {
    width: 100%;
    justify-content: center;
  }

  .link-grid {
    grid-template-columns: 1fr;
  }

  .admin-link-row {
    flex-direction: column;
    align-items: stretch;
  }

  .admin-link-row .input-title,
  .admin-link-row .input-url {
    width: 100%;
  }

  .admin-link-row .btn-delete {
    align-self: flex-end;
  }

  .navbar .container {
    flex-wrap: wrap;
  }

  .nav-logo-img {
    width: 30px;
    height: 30px;
  }
}

/* ========================================
   管理后台：guide 模块步骤编辑器
   ======================================== */
.steps-editor {
  margin: 8px 0 12px;
  padding: 12px;
  border: 1px dashed var(--border-color-strong);
  border-radius: 10px;
  background: var(--bg-secondary);
}

.steps-editor-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.admin-step-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 10px 12px;
  margin-bottom: 10px;
}

.admin-step-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}

.step-badge {
  font-size: 12px;
  font-weight: 700;
  color: var(--accent);
}

.step-tools {
  display: inline-flex;
  gap: 6px;
}

.admin-step-card input,
.admin-step-card textarea {
  width: 100%;
  background: var(--bg-secondary);
  border: 1px solid transparent;
  color: var(--text-secondary);
  font-size: 13px;
  padding: 7px 10px;
  border-radius: 7px;
  outline: none;
  font-family: inherit;
  margin-bottom: 6px;
  resize: vertical;
}

.admin-step-card input:focus,
.admin-step-card textarea:focus {
  border-color: var(--accent);
  background: var(--bg-card);
}

.btn-xs {
  padding: 2px 8px;
  font-size: 12px;
}