/* ==========================================================================
   Maker·STEAM 导航 —— 设计系统
   --------------------------------------------------------------------------
   现代、活泼、教育友好风格：
   - CSS 变量驱动主题（浅色 / 深色）
   - indigo → sky 渐变点缀
   - 圆角卡片 + 柔和阴影 + hover 上浮
   - 响应式：移动 1 列 / 平板 2 列 / 桌面 3 列
   - 系统字体栈，不依赖任何外部 CDN，纯离线可用
   ========================================================================== */

/* ---------- 主题变量 ---------- */

:root {
  /* 品牌渐变 */
  --grad-brand: linear-gradient(135deg, #6366f1 0%, #0ea5e9 100%);

  /* 浅色主题（默认） */
  --bg: #f8fafc;
  --bg-soft: #eef2f7;
  --surface: #ffffff;
  --surface-2: #f1f5f9;
  --text: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --border: #e2e8f0;
  --border-strong: #cbd5e1;
  --primary: #4f46e5;
  --primary-soft: #eef2ff;
  --accent: #0ea5e9;
  --accent-soft: #ecfeff;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.05);
  --shadow-md: 0 6px 18px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 14px 34px rgba(15, 23, 42, 0.14);
  --chip-bg: #f8fafc;
  --chip-active-bg: var(--primary);
  --chip-active-text: #ffffff;
  --card-hover-border: #a5b4fc;
  --focus-ring: 0 0 0 3px rgba(99, 102, 241, 0.35);
}

html.dark {
  --bg: #0f172a;
  --bg-soft: #111c34;
  --surface: #1e293b;
  --surface-2: #273449;
  --text: #f1f5f9;
  --text-secondary: #cbd5e1;
  --text-muted: #64748b;
  --border: #334155;
  --border-strong: #475569;
  --primary: #818cf8;
  --primary-soft: rgba(99, 102, 241, 0.18);
  --accent: #38bdf8;
  --accent-soft: rgba(14, 165, 233, 0.14);
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 6px 18px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 14px 34px rgba(0, 0, 0, 0.5);
  --chip-bg: #273449;
  --chip-active-bg: var(--primary);
  --chip-active-text: #0f172a;
  --card-hover-border: #818cf8;
  --focus-ring: 0 0 0 3px rgba(129, 140, 248, 0.4);
}

/* ---------- 基础 ---------- */

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text);
  background-color: var(--bg);
  -webkit-font-smoothing: antialiased;
  transition: background-color 0.25s ease, color 0.25s ease;
}

h1,
h2,
h3,
h4,
p {
  margin: 0;
}

a {
  color: var(--primary);
  text-decoration: none;
}

button {
  font-family: inherit;
  cursor: pointer;
}

img,
svg {
  display: block;
  max-width: 100%;
}

/* 全局焦点可见性（无障碍） */
:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

/* 容器 */
.container {
  width: min(1160px, 100% - 2rem);
  margin-inline: auto;
}

/* ==========================================================================
   通用组件
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  border: 1px solid transparent;
  border-radius: 12px;
  padding: 0.55rem 1.1rem;
  font-size: 0.95rem;
  font-weight: 600;
  line-height: 1.4;
  color: var(--text);
  background-color: var(--surface-2);
  transition: transform 0.18s ease, box-shadow 0.18s ease,
    background-color 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn:active {
  transform: translateY(0);
}

.btn-primary {
  color: #ffffff;
  background-image: var(--grad-brand);
  box-shadow: var(--shadow-md);
}

html.dark .btn-primary {
  color: #ffffff;
}

.btn-primary:hover {
  box-shadow: var(--shadow-lg);
}

.btn-lg {
  padding: 0.8rem 1.6rem;
  font-size: 1.05rem;
  border-radius: 14px;
}

.btn-sm {
  padding: 0.32rem 0.7rem;
  font-size: 0.82rem;
  border-radius: 9px;
}

.badge {
  display: inline-block;
  border-radius: 999px;
  padding: 0.16rem 0.65rem;
  font-size: 0.75rem;
  font-weight: 600;
  line-height: 1.5;
  white-space: nowrap;
}

.badge-cat {
  color: var(--primary);
  background-color: var(--primary-soft);
}

.badge-path {
  color: var(--accent);
  background-color: var(--accent-soft);
}

.badge-grade {
  color: var(--text-secondary);
  background-color: var(--surface-2);
  border: 1px solid var(--border);
}

/* ==========================================================================
   顶栏
   ========================================================================== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background-color: var(--bg);
  background-color: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-block: 0.75rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--text);
  font-weight: 800;
  font-size: 1.15rem;
}

.brand-logo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 11px;
  background-image: var(--grad-brand);
  color: #fff;
  font-size: 1.05rem;
  font-weight: 800;
  box-shadow: var(--shadow-sm);
  flex-shrink: 0;
}

.brand-sub {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 500;
  letter-spacing: 0.02em;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background-color: var(--surface);
  color: var(--text);
  font-size: 1.1rem;
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
}

.icon-btn:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
  border-color: var(--border-strong);
}

/* 页头收藏按钮（我的收藏入口，位于主题切换按钮左侧） */
.header-fav-btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  height: 40px;
  padding: 0 0.85rem;
  border-radius: 12px;
  border: 1px solid var(--border);
  background-color: var(--surface);
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 600;
  line-height: 1;
  transition: transform 0.18s ease, box-shadow 0.18s ease,
    background-color 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}

.header-fav-btn:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
  border-color: var(--border-strong);
  color: var(--text);
}

.header-fav-btn.active {
  color: #b45309;
  background-color: #fef3c7;
  border-color: #fcd34d;
}

html.dark .header-fav-btn.active {
  color: #fbbf24;
  background-color: rgba(251, 191, 36, 0.14);
  border-color: rgba(251, 191, 36, 0.45);
}

.header-fav-icon {
  font-size: 1.05rem;
  line-height: 1;
}

.header-fav-label {
  white-space: nowrap;
}

/* 页头按钮内的角标复用通用 fav-count-badge；active 时保持琥珀色，不随渐变反转 */
.header-fav-btn .fav-count-badge {
  background-color: rgba(251, 191, 36, 0.9);
  color: #422006;
}

/* 小屏：收藏按钮只显示图标与角标，隐藏文字（保留可点击性与 aria-label） */
@media (max-width: 560px) {
  .header-fav-label {
    display: none;
  }

  .header-fav-btn {
    padding: 0 0.65rem;
    gap: 0.3rem;
  }
}

/* ==========================================================================
   Hero
   ========================================================================== */

.hero {
  padding: 3.2rem 0 2.4rem;
  text-align: center;
  background:
    radial-gradient(1100px 320px at 20% -10%, var(--primary-soft), transparent 60%),
    radial-gradient(1000px 300px at 85% -20%, var(--accent-soft), transparent 60%);
}

.hero-badge {
  display: inline-block;
  margin-bottom: 1rem;
  border-radius: 999px;
  padding: 0.3rem 1rem;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--primary);
  background-color: var(--primary-soft);
  border: 1px solid var(--border-strong);
}

.hero h1 {
  font-size: clamp(1.9rem, 4.5vw, 3rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.hero h1 .grad {
  background-image: var(--grad-brand);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-sub {
  margin: 0.9rem auto 0;
  max-width: 34rem;
  color: var(--text-secondary);
  font-size: 1.02rem;
}

/* 搜索框 */
.search-box {
  position: relative;
  max-width: 34rem;
  margin: 1.8rem auto 0;
}

.search-input {
  width: 100%;
  padding: 0.95rem 3rem 0.95rem 1.1rem;
  border-radius: 16px;
  border: 1px solid var(--border);
  background-color: var(--surface);
  color: var(--text);
  font-size: 1rem;
  box-shadow: var(--shadow-md);
  transition: border-color 0.18s ease, box-shadow 0.18s ease;
}

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

.search-input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: var(--focus-ring);
}

.search-icon {
  position: absolute;
  left: 1.05rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
}

.search-clear {
  position: absolute;
  right: 0.55rem;
  top: 50%;
  transform: translateY(-50%);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  border: none;
  border-radius: 50%;
  background: transparent;
  color: var(--text-muted);
  font-size: 1rem;
  transition: background-color 0.15s ease, color 0.15s ease;
}

/* hidden 属性优先于类上的 display（修复 [hidden] 被类样式覆盖的问题）
   覆盖：搜索清除按钮、收藏角标、卡片网格、空状态、标签筛选 */
.search-clear[hidden],
.fav-count-badge[hidden],
.card-grid[hidden],
.empty-state[hidden],
.tag-filter[hidden] {
  display: none;
}

.search-clear:hover {
  background-color: var(--surface-2);
  color: var(--text);
}

/* 统计条 */
.stats {
  margin-top: 1.1rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ==========================================================================
   分类 Tab（吸顶 + 横向滚动）
   ========================================================================== */

.category-nav {
  position: sticky;
  top: 61px;
  z-index: 40;
  background-color: var(--bg);
  background-color: color-mix(in srgb, var(--bg) 86%, transparent);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.tabs-scroll {
  display: flex;
  gap: 0.5rem;
  overflow-x: auto;
  padding: 0.65rem 0.1rem;
  scrollbar-width: thin;
  scrollbar-color: var(--border-strong) transparent;
  -webkit-overflow-scrolling: touch;
}

.tabs-scroll::-webkit-scrollbar {
  height: 5px;
}

.tabs-scroll::-webkit-scrollbar-thumb {
  background: var(--border-strong);
  border-radius: 999px;
}

.category-tab {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  flex-shrink: 0;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.5rem 1rem;
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text-secondary);
  background-color: var(--surface);
  transition: transform 0.16s ease, box-shadow 0.16s ease,
    background-color 0.16s ease, color 0.16s ease, border-color 0.16s ease;
}

.category-tab:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
  color: var(--text);
  border-color: var(--border-strong);
}

.category-tab.active {
  color: #ffffff;
  background-image: var(--grad-brand);
  border-color: transparent;
  box-shadow: var(--shadow-md);
}

html.dark .category-tab.active {
  color: #ffffff;
}

.tab-emoji {
  font-size: 1.05rem;
}

/* ==========================================================================
   标签筛选
   ========================================================================== */

.tag-filter {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1.2rem;
  padding: 0.8rem 1rem;
  border-radius: 14px;
  border: 1px solid var(--border);
  background-color: var(--surface);
}

.tag-filter-label {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-secondary);
  flex-shrink: 0;
}

.tag-chip-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  flex: 1;
}

.tag-chip {
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.28rem 0.75rem;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-secondary);
  background-color: var(--chip-bg);
  transition: transform 0.15s ease, background-color 0.15s ease,
    color 0.15s ease, border-color 0.15s ease;
}

.tag-chip:hover {
  transform: translateY(-1px);
  border-color: var(--border-strong);
  color: var(--text);
}

.tag-chip.active {
  color: var(--chip-active-text);
  background-color: var(--chip-active-bg);
  border-color: transparent;
  font-weight: 600;
}

.tag-clear {
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.28rem 0.75rem;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--accent);
  background-color: var(--accent-soft);
  flex-shrink: 0;
}

.tag-clear:hover {
  border-color: var(--accent);
}

/* ==========================================================================
   卡片网格
   ========================================================================== */

.grid-wrap {
  padding: 1.4rem 0 3.5rem;
}

.grid-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
}

.grid-count {
  font-size: 0.88rem;
  color: var(--text-secondary);
  font-weight: 600;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(1, 1fr);
  gap: 1.1rem;
}

@media (min-width: 560px) {
  .card-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 920px) {
  .card-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* 卡片 */
.card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  padding: 1.2rem 1.2rem 1.05rem;
  border-radius: 18px;
  border: 1px solid var(--border);
  background-color: var(--surface);
  color: var(--text);
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--card-hover-border);
}

.card:active {
  transform: translateY(-1px) scale(0.995);
  box-shadow: var(--shadow-md);
}

.card-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.6rem;
}

.card-emoji {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 14px;
  font-size: 1.6rem;
  background: linear-gradient(135deg, var(--primary-soft), var(--accent-soft));
  flex-shrink: 0;
}

.card-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
  justify-content: flex-end;
}

.card-title {
  font-size: 1.12rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.card-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  flex: 1;
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.card-tag {
  font-size: 0.75rem;
  color: var(--text-muted);
  background-color: var(--surface-2);
  border-radius: 999px;
  padding: 0.12rem 0.55rem;
}

.card-arrow {
  margin-top: 0.2rem;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--primary);
  opacity: 0;
  transform: translateX(-4px);
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.card:hover .card-arrow,
.card:focus-visible .card-arrow {
  opacity: 1;
  transform: translateX(0);
}

/* 空状态 */
.empty-state {
  text-align: center;
  padding: 3.5rem 1rem;
  border: 1px dashed var(--border-strong);
  border-radius: 18px;
  background-color: var(--surface);
}

.empty-icon {
  font-size: 2.6rem;
}

.empty-title {
  margin-top: 0.7rem;
  font-size: 1.15rem;
  font-weight: 700;
}

.empty-desc {
  margin: 0.4rem auto 1.2rem;
  max-width: 26rem;
  color: var(--text-secondary);
  font-size: 0.92rem;
}

/* ==========================================================================
   详情页
   ========================================================================== */

.detail-main {
  padding: 1.8rem 0 3.5rem;
}

.detail-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.4rem;
}

.back-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0.5rem 0.95rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-secondary);
  background-color: var(--surface);
  transition: transform 0.16s ease, box-shadow 0.16s ease, color 0.16s ease;
}

.back-btn:hover {
  transform: translateX(-2px);
  box-shadow: var(--shadow-md);
  color: var(--text);
}

.detail-card {
  border: 1px solid var(--border);
  border-radius: 22px;
  background-color: var(--surface);
  box-shadow: var(--shadow-md);
  padding: 2rem 1.6rem;
}

@media (min-width: 640px) {
  .detail-card {
    padding: 2.6rem 2.6rem;
  }
}

.detail-hero {
  display: flex;
  align-items: flex-start;
  gap: 1.2rem;
  flex-wrap: wrap;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
}

.detail-emoji {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 84px;
  height: 84px;
  border-radius: 22px;
  font-size: 2.8rem;
  background: linear-gradient(135deg, var(--primary-soft), var(--accent-soft));
  flex-shrink: 0;
}

.detail-heading {
  flex: 1;
  min-width: 220px;
}

.detail-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 0.6rem;
}

.detail-title {
  font-size: clamp(1.5rem, 3.4vw, 2.1rem);
  font-weight: 800;
  letter-spacing: -0.02em;
}

.detail-desc {
  margin-top: 0.45rem;
  color: var(--text-secondary);
  font-size: 1.02rem;
}

.detail-section {
  margin-top: 1.6rem;
}

.detail-section-title {
  font-size: 1.06rem;
  font-weight: 700;
  margin-bottom: 0.7rem;
}

.detail-intro {
  color: var(--text-secondary);
  font-size: 0.98rem;
  line-height: 1.85;
  background-color: var(--surface-2);
  border-radius: 14px;
  padding: 1rem 1.1rem;
}

.detail-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.detail-tag {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--primary);
  background-color: var(--primary-soft);
  border-radius: 999px;
  padding: 0.24rem 0.75rem;
}

.detail-actions {
  margin-top: 1.7rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

/* 相关推荐 */
.related-grid {
  display: grid;
  grid-template-columns: repeat(1, 1fr);
  gap: 0.7rem;
}

@media (min-width: 640px) {
  .related-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.related-card {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  padding: 0.85rem 0.9rem;
  border-radius: 14px;
  border: 1px solid var(--border);
  background-color: var(--surface);
  color: var(--text);
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
}

.related-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--card-hover-border);
}

.related-emoji {
  font-size: 1.5rem;
  flex-shrink: 0;
}

.related-info {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.related-name {
  font-weight: 700;
  font-size: 0.92rem;
}

.related-desc {
  font-size: 0.78rem;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* 学习路径 */
.path-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
}

.path-step {
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1.2rem 1.2rem;
  background-color: var(--surface);
}

.path-step-header {
  display: flex;
  gap: 0.9rem;
  align-items: flex-start;
}

.path-step-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background-image: var(--grad-brand);
  color: #ffffff;
  font-weight: 800;
  font-size: 0.95rem;
  flex-shrink: 0;
}

.path-step-title {
  font-size: 1.05rem;
  font-weight: 700;
}

.path-step-desc {
  margin-top: 0.25rem;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.path-resources {
  list-style: none;
  margin: 0.9rem 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.path-resource {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  padding: 0.65rem 0.75rem;
  border-radius: 12px;
  background-color: var(--surface-2);
}

.path-resource-emoji {
  font-size: 1.3rem;
  flex-shrink: 0;
}

.path-resource-info {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.path-resource-name {
  font-weight: 600;
  font-size: 0.9rem;
}

.path-resource-desc {
  font-size: 0.78rem;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* 未找到 */
.not-found {
  text-align: center;
  padding: 3.5rem 1rem;
}

.not-found-icon {
  font-size: 3rem;
}

.not-found-title {
  margin-top: 0.8rem;
  font-size: 1.4rem;
  font-weight: 800;
}

.not-found-desc {
  margin: 0.5rem auto 1.4rem;
  max-width: 24rem;
  color: var(--text-secondary);
}

/* ==========================================================================
   页脚
   ========================================================================== */

.site-footer {
  border-top: 1px solid var(--border);
  background-color: var(--surface);
  padding: 1.6rem 0 2rem;
  margin-top: 1rem;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.4rem;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
}

.footer-brand {
  font-weight: 700;
  color: var(--text-secondary);
}

/* ==========================================================================
   动效
   ========================================================================== */

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.card-grid .card {
  animation: fadeInUp 0.32s ease both;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001s !important;
    transition-duration: 0.001s !important;
    scroll-behavior: auto !important;
  }
}

/* ==========================================================================
   收藏 / 人气 / 排序 / 搜索模式（功能增强）
   ========================================================================== */

/* 收藏角标（页头收藏按钮内复用） */
.fav-count-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 1.25rem;
  height: 1.25rem;
  padding: 0 0.3rem;
  border-radius: 999px;
  background-color: rgba(251, 191, 36, 0.9);
  color: #422006;
  font-size: 0.72rem;
  font-weight: 800;
  line-height: 1;
}

/* 卡片收藏按钮 */
.card-fav {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background-color: var(--surface);
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1;
  padding: 0;
  flex-shrink: 0;
  transition: transform 0.15s ease, background-color 0.15s ease,
    color 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease;
}

.card-fav:hover {
  transform: scale(1.12);
  border-color: #f59e0b;
  color: #f59e0b;
  box-shadow: var(--shadow-sm);
}

.card-fav.active {
  color: #b45309;
  background-color: #fef3c7;
  border-color: #fcd34d;
}

html.dark .card-fav.active {
  color: #fbbf24;
  background-color: rgba(251, 191, 36, 0.16);
  border-color: rgba(251, 191, 36, 0.5);
}

/* 人气徽标 */
.badge-views {
  color: #b45309;
  background-color: #fef3c7;
  border: 1px solid #fde68a;
}

html.dark .badge-views {
  color: #fbbf24;
  background-color: rgba(251, 191, 36, 0.14);
  border-color: rgba(251, 191, 36, 0.35);
}

/* 网格 meta：提示 + 排序控件 */
.grid-meta-left {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  min-width: 0;
}

.sort-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.2rem;
  padding: 0.2rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background-color: var(--surface-2);
  flex-shrink: 0;
}

.sort-btn {
  border: none;
  border-radius: 999px;
  padding: 0.3rem 0.8rem;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-secondary);
  background-color: transparent;
  transition: background-color 0.15s ease, color 0.15s ease, box-shadow 0.15s ease;
}

.sort-btn:hover {
  color: var(--text);
}

.sort-btn.active {
  color: #ffffff;
  background-image: var(--grad-brand);
  box-shadow: var(--shadow-sm);
}

html.dark .sort-btn.active {
  color: #ffffff;
}

@media (max-width: 640px) {
  .grid-meta {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.6rem;
  }
}

/* 全站搜索 / 收藏模式提示条 */
.search-mode-note {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--accent);
  background-color: var(--accent-soft);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.3rem 0.7rem;
  width: fit-content;
  max-width: 100%;
}

/* 命中高亮标签 */
.card-tag.hit {
  color: #92400e;
  background-color: #fef3c7;
  border: 1px solid #fcd34d;
  font-weight: 700;
}

html.dark .card-tag.hit {
  color: #fbbf24;
  background-color: rgba(251, 191, 36, 0.16);
  border-color: rgba(251, 191, 36, 0.45);
}

/* 详情页收藏按钮 */
.detail-fav {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0.8rem 1.4rem;
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.4;
  color: var(--text-secondary);
  background-color: var(--surface);
  transition: transform 0.18s ease, box-shadow 0.18s ease,
    background-color 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}

.detail-fav:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
  border-color: #f59e0b;
  color: #b45309;
}

.detail-fav.active {
  color: #b45309;
  background-color: #fef3c7;
  border-color: #fcd34d;
}

html.dark .detail-fav.active {
  color: #fbbf24;
  background-color: rgba(251, 191, 36, 0.14);
  border-color: rgba(251, 191, 36, 0.45);
}