/* 首页导航 · 专属样式 */

.home-hero {
  padding: 12px 0 14px;
  margin-bottom: 10px;
  border-bottom: 1px solid var(--border);
  text-align: center;
}
.home-hero h1.hero-title {
  display: flex;
  align-items: baseline;
  justify-content: center;
  flex-wrap: wrap;
  gap: 2px 12px;
  margin: 0 0 12px;
  font-size: 24px;
  letter-spacing: -.5px;
}
.home-hero .hero-name {
  font-weight: 800;
  background: linear-gradient(100deg, #ff4d8d, #ff9a3d, #ffd23d, #4dd06b, #3da5ff, #9b5cff, #ff4d8d);
  background-size: 220% 100%;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  -webkit-text-fill-color: transparent;
  animation: heroRainbow 6s linear infinite;
  text-shadow: 0 1px 18px color-mix(in srgb, #ff4d8d 25%, transparent);
}
@keyframes heroRainbow {
  0% { background-position: 0% 50%; }
  100% { background-position: 200% 50%; }
}
@media (prefers-reduced-motion: reduce) {
  .home-hero .hero-name { animation: none; }
}
.home-hero .hero-sub {
  font-size: 15px;
  font-weight: 500;
  color: var(--text-soft);
  -webkit-text-fill-color: var(--text-soft);
}

.home-search {
  position: relative;
  max-width: 600px;
  margin: 0 auto;
}
.home-search svg {
  position: absolute;
  left: 15px; top: 50%;
  transform: translateY(-50%);
  width: 18px; height: 18px;
  color: var(--text-mute);
  pointer-events: none;
}
.home-search input {
  height: 50px;
  padding: 0 44px 0 44px;
  font-size: 15.5px;
  border-radius: 999px;
  background: var(--bg-elev);
  border: 1px solid var(--border-strong);
  box-shadow: var(--shadow-s);
}
.search-kbd {
  position: absolute;
  right: 15px; top: 50%;
  transform: translateY(-50%);
  color: var(--text-mute);
}

.home-stats {
  display: flex;
  justify-content: center;
  gap: 22px;
  flex-wrap: wrap;
  margin-top: 12px;
  color: var(--text-mute);
  font-size: 13px;
}
.home-stats b { color: var(--accent); font-size: 15px; font-variant-numeric: tabular-nums; }

.home-main { padding: 6px 0 60px; max-width: 1320px; }

/* =========================================================
   左侧分类导航（桌面常驻侧栏 / 移动端抽屉）
   ========================================================= */
.home-layout {
  display: grid;
  grid-template-columns: 236px minmax(0, 1fr);
  gap: 22px;
  align-items: start;
}
.home-content { min-width: 0; }
.home-bar { display: none; }

.side-nav {
  position: sticky;
  top: calc(var(--header-h) + 14px);
  max-height: calc(100vh - var(--header-h) - 28px);
  display: flex;
  flex-direction: column;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: var(--shadow-s);
  overflow: hidden;
}
.side-nav-head {
  flex: none;
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 9px 8px 9px 12px;
  border-bottom: 1px solid var(--border);
}
.side-nav-head .sn-title {
  flex: 1 1 auto;
  font-size: 13px;
  font-weight: 650;
  color: var(--text-soft);
}
.side-nav-head .sn-act {
  flex: none;
  border: none;
  background: transparent;
  font-family: inherit;
  font-size: 12.5px;
  color: var(--text-mute);
  padding: 3px 7px;
  border-radius: 7px;
  cursor: pointer;
  transition: .14s;
  white-space: nowrap;
}
.side-nav-head .sn-act:hover { color: var(--accent); background: var(--accent-soft); }
.side-nav-head .sn-close { display: none; font-size: 13px; }

.side-nav-body {
  flex: 1 1 auto;
  overflow-y: auto;
  overscroll-behavior: contain;
  padding: 6px;
}

.sn-row { display: flex; align-items: center; gap: 1px; }
.sn-cat {
  flex: 1 1 auto;
  min-width: 0;
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 6px 8px;
  border-radius: 8px;
  color: var(--text);
  font-size: 15px;
  font-weight: 600;
  transition: .13s;
}
.sn-cat:hover { background: var(--bg-soft); text-decoration: none; }
.sn-cat.active { background: var(--accent-soft); color: var(--accent); }
.sn-cat .sn-icon {
  flex: none;
  width: 20px; height: 20px;
  display: grid; place-items: center;
  border-radius: 6px;
  background: var(--bg-soft);
  color: var(--text-soft);
  font-size: 11px;
  font-weight: 700;
  line-height: 1;
}
.sn-cat.active .sn-icon { background: var(--accent); color: #fff; }
.sn-cat .sn-name { flex: 1 1 auto; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.sn-cat .sn-num {
  flex: none;
  font-size: 11.5px;
  font-weight: 500;
  color: var(--text-mute);
  font-variant-numeric: tabular-nums;
}
.sn-cat.active .sn-num { color: var(--accent); }

.sn-all { margin-bottom: 4px; }

.sn-fold {
  flex: none;
  width: 22px; height: 22px;
  display: grid; place-items: center;
  border: none;
  background: transparent;
  color: var(--text-mute);
  border-radius: 6px;
  cursor: pointer;
  transition: .14s;
}
.sn-fold:hover { background: var(--bg-soft); color: var(--accent); }
.sn-fold svg { width: 13px; height: 13px; transition: transform .18s; }
.sn-group.folded .sn-fold svg { transform: rotate(-90deg); }
.sn-group.folded .sn-tools { display: none; }

.sn-tools {
  list-style: none;
  margin: 1px 0 5px;
  padding: 0 0 0 26px;
  border-left: 1px solid var(--border);
  margin-left: 17px;
}
.sn-tools a {
  display: block;
  padding: 3.5px 8px;
  border-radius: 7px;
  color: var(--text-soft);
  font-size: 12.8px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.sn-tools a:hover { background: var(--bg-soft); color: var(--accent); text-decoration: none; }
.sn-empty { padding: 20px 10px; text-align: center; color: var(--text-mute); font-size: 12.5px; }

.side-nav-mask { display: none; }

/* 桌面端有常驻侧栏，顶部胶囊导航不再重复展示 */
@media (min-width: 981px) {
  .cat-nav { display: none; }
  .cat-section { scroll-margin-top: calc(var(--header-h) + 16px); }
  /* 内容区一行显示 4 个工具 */
  .tool-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

/* 分类导航 */
.cat-nav {
  position: sticky;
  top: var(--header-h);
  z-index: 30;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 12px 0;
  margin-bottom: 6px;
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: blur(8px);
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}
.cat-nav::-webkit-scrollbar { display: none; }
.cat-nav .chip { flex: none; }

/* 分类区块 */
.cat-section { margin: 16px 0 22px; scroll-margin-top: 108px; }
.cat-head {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 12px;
}
.cat-head h2 { font-size: 18px; }
.cat-head .cat-icon {
  display: inline-grid;
  place-items: center;
  width: 26px; height: 26px;
  border-radius: 8px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 13px;
  font-weight: 700;
  align-self: center;
}
.cat-head .cat-d { color: var(--text-mute); font-size: 13px; }

/* 工具卡片 */
.tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(238px, 1fr));
  gap: 12px;
}
.tool-card {
  position: relative;
  display: block;
  padding: 14px 15px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 14px;
  color: var(--text);
  transition: .17s;
  overflow: hidden;
}
.tool-card::after {
  content: "";
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 3px;
  background: var(--accent);
  transform: scaleY(0);
  transition: transform .2s;
}
.tool-card:hover {
  text-decoration: none;
  border-color: color-mix(in srgb, var(--accent) 45%, var(--border));
  box-shadow: var(--shadow);
  transform: translateY(-2px);
}
.tool-card:hover::after { transform: scaleY(1); }
.tool-card .t-name {
  font-weight: 650;
  font-size: 15px;
  display: flex;
  align-items: center;
  gap: 6px;
}
.tool-card .t-desc {
  color: var(--text-mute);
  font-size: 12.8px;
  line-height: 1.55;
  margin-top: 5px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.fav-btn {
  position: absolute;
  right: 8px; top: 8px;
  width: 26px; height: 26px;
  display: grid; place-items: center;
  border: none;
  background: transparent;
  color: var(--text-mute);
  opacity: 0;
  cursor: pointer;
  border-radius: 6px;
  transition: .15s;
}
.tool-card:hover .fav-btn, .fav-btn.on { opacity: 1; }
.fav-btn:hover { background: var(--bg-soft); color: var(--accent); }
.fav-btn.on { color: #f0a020; }
.fav-btn.on svg { fill: #f0a020; }
.fav-btn svg { width: 15px; height: 15px; }

/* 快捷区 */
.quick-block { margin: 4px 0 8px; }
.quick-block h2 { font-size: 15px; color: var(--text-soft); margin-bottom: 10px; }
.quick-list { display: flex; flex-wrap: wrap; gap: 8px; }

/* 空状态 */
.empty-state { text-align: center; padding: 50px 0; color: var(--text-mute); }
.empty-state p { margin-bottom: 12px; }

/* 关于 */
.about-block { margin-top: 40px; padding-top: 26px; border-top: 1px solid var(--border); }
.about-block h2 { font-size: 17px; margin-bottom: 14px; }
.about-card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 16px;
}
.about-card h3 { font-size: 14.5px; margin-bottom: 6px; color: var(--accent); }
.about-card p { color: var(--text-soft); font-size: 13.5px; margin: 0; line-height: 1.7; }
.doc-links { margin-top: 16px; color: var(--text-mute); font-size: 13.5px; }

/* 中小屏：侧栏变为可开合抽屉 */
@media (max-width: 980px) {
  .home-layout { display: block; }
  .home-bar { display: flex; align-items: center; gap: 8px; padding: 10px 0 2px; }
  .side-nav-toggle svg { width: 15px; height: 15px; }

  .side-nav {
    position: fixed;
    left: 0; top: 0; bottom: 0;
    width: min(286px, 84vw);
    max-height: none;
    z-index: 120;
    border-radius: 0;
    border-width: 0 1px 0 0;
    box-shadow: var(--shadow-l);
    transform: translateX(-102%);
    transition: transform .22s ease;
  }
  .side-nav.open { transform: none; }
  .side-nav-head { padding-top: calc(9px + env(safe-area-inset-top)); }
  .side-nav-head .sn-close { display: inline-block; }

  .side-nav-mask {
    display: block;
    position: fixed;
    inset: 0;
    z-index: 110;
    background: rgba(16, 20, 28, .42);
    backdrop-filter: blur(2px);
    animation: fade-in .15s ease;
  }
  .side-nav-mask[hidden] { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  .side-nav { transition: none; }
}

@media (max-width: 720px) {
  .home-hero { padding: 14px 0 12px; }
  .home-hero h1.hero-title { font-size: 22px; margin-bottom: 12px; }
  .home-hero .hero-sub { font-size: 13px; }
  .home-search input { height: 46px; font-size: 15px; }
  .search-kbd { display: none; }
  .tool-grid { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 10px; }
  .tool-card { padding: 12px; border-radius: 12px; }
  .tool-card .t-name { font-size: 14px; }
  .tool-card .t-desc { -webkit-line-clamp: 2; font-size: 12px; }
  .fav-btn { opacity: .45; }
  .cat-section { scroll-margin-top: 96px; }
  .about-block .grid-3 { gap: 10px; }
}