/* ==========================================================================
   xhxh.vip 首页 · v0 改造样式
   --------------------------------------------------------------------------
   单文件承载首页全部样式，不依赖 tailwind.css。
   变量名沿用原 design-system.css 的 --xh-* 命名，fab.css / fab.js 无需改动。
   设计取向：绿色从「面积」退回「标记」；密度优先；搜索常驻。
   ========================================================================== */

:root {
  /* 字体 */
  --xh-font: "PingFang SC", "Noto Sans SC", "HarmonyOS Sans SC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, sans-serif;
  --xh-font-mono: ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;

  /* 间距阶 */
  --xh-s1: 4px;  --xh-s2: 8px;  --xh-s3: 12px; --xh-s4: 16px;
  --xh-s5: 20px; --xh-s6: 24px; --xh-s7: 32px; --xh-s8: 40px; --xh-s9: 64px;

  /* 圆角 */
  --xh-r-sm: 4px; --xh-r-md: 6px; --xh-r-lg: 8px; --xh-r-xl: 10px; --xh-r-2xl: 14px;

  /* 表面与文字 */
  --xh-bg: #ffffff;            /* 侧栏 / 卡面 */
  --xh-page: #f6f7f9;          /* 内容区底色 */
  --xh-surface: #f2f4f7;
  --xh-surface-2: #eef1f5;
  --xh-border: #e4e8ee;
  --xh-border-strong: #d5dae3;
  --xh-text: #0e1626;
  --xh-text-2: #475467;
  --xh-muted: #667085;

  /* 唯一强调色 */
  --xh-accent: #3cb884;
  --xh-accent-hover: #2fa876;
  --xh-accent-ink: #1f8f62;
  --xh-accent-tint: #eaf8f1;
  --xh-on-accent: #ffffff;
  --xh-ring: rgba(60, 184, 132, .18);
  --xh-mark: rgba(60, 184, 132, .2);

  /* 阴影 */
  --xh-shadow: 0 1px 2px rgba(16, 24, 40, .05);
  --xh-shadow-md: 0 2px 8px rgba(16, 24, 40, .08), 0 1px 2px rgba(16, 24, 40, .04);
  --xh-shadow-lg: 0 12px 32px -12px rgba(16, 24, 40, .24);

  /* 动效 */
  --xh-ease: cubic-bezier(.22, 1, .36, 1);
  --xh-dur-move: 240ms;
  --xh-dur-color: 160ms;

  /* 内容区自适应：内侧留白随视口增长（20→40px），最大宽度封顶 1680，
     超宽屏（2K/4K）不再出现两侧各 600px 的空地 */
  --xh-content-max: 1680px;
  /* 侧栏随视口微增：1685px 以下保持 236，之后按 14vw 长到 276 封顶，
     避免 1920/2560 上侧栏只占 9~12% 显得又窄又空 */
  --xh-sidebar: clamp(236px, 14vw, 276px);

  /* 图标底色（monogram 六档，低饱和，不与品牌绿抢） */
  --xh-t0-bg: #edf2f7; --xh-t0-fg: #3a5a78;
  --xh-t1-bg: #e9f4ef; --xh-t1-fg: #2f6b55;
  --xh-t2-bg: #f4efea; --xh-t2-fg: #7a5a3f;
  --xh-t3-bg: #efedf5; --xh-t3-fg: #55497e;
  --xh-t4-bg: #f1f3e9; --xh-t4-fg: #5a6540;
  --xh-t5-bg: #f3edf0; --xh-t5-fg: #7a4a5e;
}

html.dark {
  --xh-bg: #161b22;
  --xh-page: #0f141a;
  --xh-surface: #1c232c;
  --xh-surface-2: #232b36;
  --xh-border: #262e39;
  --xh-border-strong: #33404e;
  --xh-text: #e6e9f0;
  --xh-text-2: #c2c9d6;
  --xh-muted: #94a0b4;
  --xh-accent: #46c793;
  --xh-accent-hover: #55d3a0;
  --xh-accent-ink: #6fd9ae;
  --xh-accent-tint: rgba(70, 199, 147, .13);
  --xh-on-accent: #08211a;
  --xh-ring: rgba(70, 199, 147, .22);
  --xh-mark: rgba(70, 199, 147, .28);
  --xh-shadow: 0 1px 2px rgba(0, 0, 0, .35);
  --xh-shadow-md: 0 2px 10px rgba(0, 0, 0, .45);
  --xh-shadow-lg: 0 16px 40px -16px rgba(0, 0, 0, .65);
  --xh-t0-bg: #1e2833; --xh-t0-fg: #9fc0dc;
  --xh-t1-bg: #1b2a24; --xh-t1-fg: #8fcfb4;
  --xh-t2-bg: #29231d; --xh-t2-fg: #d3b191;
  --xh-t3-bg: #23202e; --xh-t3-fg: #b7aede;
  --xh-t4-bg: #242620; --xh-t4-fg: #bfc79a;
  --xh-t5-bg: #2a2025; --xh-t5-fg: #d7adbd;
}

/* --------------------------------------------------------------------------
   1. 基线
   -------------------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }
html, body { margin: 0; padding: 0; }

body {
  background: var(--xh-page);
  color: var(--xh-text);
  font-family: var(--xh-font);
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  text-wrap: pretty;
}

a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
svg { display: block; }
h1, h2, h3, p { margin: 0; }
ul { margin: 0; padding: 0; list-style: none; }
mark { background: var(--xh-mark); color: inherit; font-weight: 600; border-radius: 3px; padding: 0 1px; }

:focus-visible {
  outline: 2px solid var(--xh-accent);
  outline-offset: 2px;
  border-radius: 6px;
}
::selection { background: var(--xh-accent-tint); color: var(--xh-accent-ink); }

/* 细滚动条（桌面） */
@media (pointer: fine) {
  * { scrollbar-width: thin; scrollbar-color: var(--xh-border-strong) transparent; }
  *::-webkit-scrollbar { width: 8px; height: 8px; }
  *::-webkit-scrollbar-thumb { background: var(--xh-border-strong); border-radius: 99px; }
  *::-webkit-scrollbar-track { background: transparent; }
}

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.skip {
  position: fixed; top: 8px; left: 8px; z-index: 200;
  padding: 8px 14px; border-radius: 8px;
  background: var(--xh-accent); color: var(--xh-on-accent);
  font-size: 13px; font-weight: 600;
  transform: translateY(-200%);
  transition: transform var(--xh-dur-move) var(--xh-ease);
}
.skip:focus { transform: none; }
.wrap {
  width: 100%; max-width: var(--xh-content-max);
  margin: 0 auto;
  padding: 0 clamp(20px, 2.4vw, 40px);
}

/* --------------------------------------------------------------------------
   2. 侧栏
   -------------------------------------------------------------------------- */
.sidebar {
  position: fixed; inset: 0 auto 0 0; z-index: 50;
  width: var(--xh-sidebar);
  display: flex; flex-direction: column;
  background: var(--xh-bg);
  border-right: 1px solid var(--xh-border);
}
.brand {
  display: flex; align-items: center; gap: 10px;
  height: 64px; flex: 0 0 auto; padding: 0 clamp(16px, 1.1vw, 20px);
}
.brand img { width: 26px; height: 26px; border-radius: 8px; object-fit: cover; box-shadow: 0 0 0 1px var(--xh-border); }
.brand-name { font-size: 13px; font-weight: 600; letter-spacing: .01em; }
.brand-sub { font-size: 11px; color: var(--xh-muted); line-height: 1.3; }

.nav { flex: 1 1 auto; overflow-y: auto; overscroll-behavior: contain; padding: 4px var(--xh-s2) 14px; }
.nav-label {
  display: flex; align-items: center; gap: 6px;
  padding: 14px var(--xh-s2) 6px;
  font-size: 11px; font-weight: 500; color: var(--xh-muted); letter-spacing: .04em;
}
.nav-label .n { margin-left: auto; font-variant-numeric: tabular-nums; opacity: .8; }

.nav-item {
  display: flex; align-items: center; gap: clamp(9px, .7vw, 12px);
  height: 34px; padding: 0 clamp(8px, .75vw, 12px); margin-bottom: 1px;
  border-radius: var(--xh-r-lg);
  font-size: 13px; color: var(--xh-text-2);
  transition: background var(--xh-dur-color) var(--xh-ease), color var(--xh-dur-color) var(--xh-ease);
}
.nav-item > svg { width: 15px; height: 15px; flex: 0 0 auto; color: var(--xh-muted); }
.nav-item .n { flex: 1 1 auto; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; text-align: left; }
.nav-item .c { font-size: 11px; color: var(--xh-muted); font-variant-numeric: tabular-nums; }
.nav-item:hover { background: var(--xh-surface); color: var(--xh-text); }
.nav-item:hover > svg { color: var(--xh-text-2); }
.nav-item.is-active {
  background: var(--xh-accent-tint); color: var(--xh-text); font-weight: 600;
  box-shadow: inset 2px 0 0 var(--xh-accent);
}
.nav-item.is-active > svg { color: var(--xh-accent-ink); }
.nav-item.is-active .c { color: var(--xh-accent-ink); }

/* 一级分类 + 右侧展开箭头（两层树；更深层级走面包屑） */
.nav-row { display: flex; align-items: center; gap: 2px; }
.nav-row .nav-item { flex: 1 1 auto; min-width: 0; }
.nav-tog {
  width: 22px; height: 22px; flex: 0 0 auto;
  display: grid; place-items: center;
  border-radius: var(--xh-r-sm);
  color: var(--xh-border-strong);
  transition: color var(--xh-dur-color) var(--xh-ease), background var(--xh-dur-color) var(--xh-ease);
}
.nav-tog:hover { color: var(--xh-text-2); background: var(--xh-surface); }
.nav-tog svg { width: 11px; height: 11px; transition: transform 180ms var(--xh-ease); }
.nav-tog[aria-expanded="true"] { color: var(--xh-accent-ink); }
.nav-tog[aria-expanded="true"] svg { transform: rotate(90deg); }

.nav-sub {
  padding-left: 12px;
  margin: 1px 0 4px 9px;
  border-left: 1px solid var(--xh-border);
}
.nav-sub[hidden] { display: none; }
.nav-sub .nav-item { height: 28px; font-size: 12.5px; padding: 0 6px; }
.nav-sub .nav-item > svg { width: 13px; height: 13px; }
.nav-sub .nav-item .c { font-size: 10.5px; }

/* --------------------------------------------------------------------------
   3. 主壳 / 顶栏
   -------------------------------------------------------------------------- */
.shell {
  margin-left: var(--xh-sidebar);
  min-height: 100dvh;
  display: flex; flex-direction: column;
}
.topbar {
  position: sticky; top: 0; z-index: 40;
  padding: 12px 0;
  background: color-mix(in srgb, var(--xh-page) 84%, transparent);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--xh-dur-color) var(--xh-ease), background var(--xh-dur-color) var(--xh-ease);
}
/* 滚动后才出现分隔线，静止时顶栏与内容融为一体 */
.topbar.is-stuck {
  border-bottom-color: var(--xh-border);
  background: color-mix(in srgb, var(--xh-page) 92%, transparent);
}
.topbar .wrap { display: flex; flex-wrap: wrap; align-items: center; gap: var(--xh-s3); }

/* 移动端顶栏上的菜单行 */
.m-bar { display: none; }

/* --------------------------------------------------------------------------
   4. 搜索（保留原样式：宽输入框 + 右侧深色圆形按钮 + 下方引擎标签）
   -------------------------------------------------------------------------- */
.search-form { flex: 1 1 auto; min-width: 0; }
@media (max-width: 1024px) { .search-form { flex: 1 0 100%; } }
.search {
  position: relative; display: flex; align-items: center;
  height: 44px;
  background: var(--xh-bg);
  border: 1px solid var(--xh-border-strong);
  border-radius: var(--xh-r-2xl);
  box-shadow: var(--xh-shadow);
  transition: border-color var(--xh-dur-color) var(--xh-ease), box-shadow var(--xh-dur-color) var(--xh-ease);
}
.search:focus-within {
  border-color: var(--xh-accent);
  box-shadow: 0 0 0 3px var(--xh-ring), var(--xh-shadow);
}
.search-ico {
  position: absolute; left: 15px;
  width: 17px; height: 17px; color: var(--xh-muted);
  pointer-events: none;
}
.search-input {
  flex: 1 1 auto; width: 100%; min-width: 0;
  height: 100%; padding: 0 96px 0 43px;
  border: 0; outline: 0; background: none;
  font-family: inherit; font-size: 14.5px; color: var(--xh-text);
}
.search-input::placeholder { color: var(--xh-muted); }
.search-input::-webkit-search-cancel-button { -webkit-appearance: none; }

.search-kbd {
  position: absolute; right: 52px;
  display: flex; align-items: center; gap: 2px;
  padding: 2px 6px; border: 1px solid var(--xh-border); border-radius: 5px;
  background: var(--xh-surface);
  font-family: var(--xh-font-mono); font-size: 10.5px; color: var(--xh-muted);
  pointer-events: none;
  transition: opacity var(--xh-dur-color) var(--xh-ease);
}
.search-input:not(:placeholder-shown) ~ .search-kbd { opacity: 0; }

.search-button {
  position: absolute; right: 5px;
  width: 34px; height: 34px;
  display: grid; place-items: center;
  border-radius: 50%;
  background: var(--xh-text); color: var(--xh-page);
  transition: background var(--xh-dur-color) var(--xh-ease), transform var(--xh-dur-move) var(--xh-ease);
}
.search-button svg { width: 15px; height: 15px; }
.search-button:hover { background: var(--xh-accent); color: #fff; }
html.dark .search-button { color: #0f141a; }
html.dark .search-button:hover { color: #08211a; }
.search-button:active { transform: scale(.94); }

/* --------------------------------------------------------------------------
   5. 搜索引擎标签（原样保留，一行横向滚动，不再换行）
   -------------------------------------------------------------------------- */
.engines {
  display: flex; align-items: center; gap: 2px;
  margin: 0 0 20px;
  padding-bottom: 2px;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
}
.engines::-webkit-scrollbar { display: none; }

.engine {
  flex: 0 0 auto;
  padding: 5px 11px;
  border: 0; border-radius: var(--xh-r-lg);
  font-size: 13px; color: var(--xh-muted); white-space: nowrap;
  transition: color var(--xh-dur-color) var(--xh-ease), background var(--xh-dur-color) var(--xh-ease);
}
.engine:hover { color: var(--xh-text); background: var(--xh-surface); }
.engine.is-on {
  background: var(--xh-accent-tint); color: var(--xh-accent-ink);
  font-weight: 600;
}

/* --------------------------------------------------------------------------
   6. 页头
   -------------------------------------------------------------------------- */
main { flex: 1 1 auto; padding-bottom: 40px; }

.crumbs {
  display: flex; align-items: center; gap: 6px; flex-wrap: wrap;
  margin: 4px 0 10px;
  font-size: 11.5px; color: var(--xh-muted);
}
.crumbs a { transition: color var(--xh-dur-color) var(--xh-ease); }
.crumbs a:hover { color: var(--xh-accent-ink); }
.crumbs .sep { color: var(--xh-border-strong); }

.page-head {
  display: flex; align-items: flex-end; gap: var(--xh-s4);
  margin-bottom: 24px;
}
.page-head h1 {
  font-size: 26px; font-weight: 600; letter-spacing: -.02em; line-height: 1.2;
}
.page-sub { margin-top: 6px; font-size: 12px; color: var(--xh-muted); letter-spacing: .01em; }
.page-sub b { color: var(--xh-text-2); font-weight: 600; font-variant-numeric: tabular-nums; }

.view-switch {
  margin-left: auto; display: flex; gap: 2px; padding: 3px;
  background: var(--xh-surface); border-radius: var(--xh-r-lg);
}
.view-switch button {
  display: grid; place-items: center;
  width: 30px; height: 26px; border-radius: 6px;
  color: var(--xh-muted);
  transition: background var(--xh-dur-color) var(--xh-ease), color var(--xh-dur-color) var(--xh-ease), box-shadow var(--xh-dur-color) var(--xh-ease);
}
.view-switch button svg { width: 14px; height: 14px; }
.view-switch button[aria-pressed="true"] {
  background: var(--xh-bg); color: var(--xh-text);
  box-shadow: var(--xh-shadow);
}

/* --------------------------------------------------------------------------
   7. 分区标题
   -------------------------------------------------------------------------- */
.sect { margin-bottom: 28px; }
.sect + .sect { margin-top: 4px; }
.sect-head { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; }
.sect-title { font-size: 12px; font-weight: 600; color: var(--xh-text-2); letter-spacing: .03em; }
.sect-count { font-size: 11px; color: var(--xh-muted); font-variant-numeric: tabular-nums; }
.sect-rule { flex: 1 1 auto; height: 1px; background: var(--xh-border); }

/* --------------------------------------------------------------------------
   8. 文件夹卡
   -------------------------------------------------------------------------- */
.folders {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: clamp(10px, .5vw, 13px);
}
.folder {
  display: flex; align-items: center; gap: 10px;
  height: 58px; padding: 0 12px;
  background: var(--xh-bg);
  border: 1px solid var(--xh-border);
  border-radius: var(--xh-r-xl);
  box-shadow: var(--xh-shadow);
  text-align: left;
  transition: border-color var(--xh-dur-color) var(--xh-ease),
              box-shadow var(--xh-dur-color) var(--xh-ease),
              transform var(--xh-dur-move) var(--xh-ease);
}
.folder:hover { border-color: var(--xh-border-strong); box-shadow: var(--xh-shadow-md); transform: translateY(-1px); }
.folder:active { transform: scale(.99); }
.folder-ico {
  display: grid; place-items: center;
  width: 30px; height: 30px; flex: 0 0 auto;
  border-radius: var(--xh-r-lg);
  background: var(--xh-accent-tint); color: var(--xh-accent-ink);
}
.folder-ico svg { width: 16px; height: 16px; }
.folder-meta { flex: 1 1 auto; min-width: 0; display: flex; flex-direction: column; gap: 1px; }
.folder-name {
  font-size: 13px; font-weight: 600; color: var(--xh-text);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.folder-count { font-size: 11px; color: var(--xh-muted); font-variant-numeric: tabular-nums; }
.folder-chev {
  width: 12px; height: 12px; flex: 0 0 auto;
  color: var(--xh-border-strong);
  opacity: 0; transform: translateX(-3px);
  transition: opacity var(--xh-dur-color) var(--xh-ease), transform var(--xh-dur-color) var(--xh-ease);
}
.folder:hover .folder-chev { opacity: 1; transform: none; }
.folder-lock { width: 11px; height: 11px; color: var(--xh-muted); flex: 0 0 auto; }

/* --------------------------------------------------------------------------
   9. 站点卡
   -------------------------------------------------------------------------- */
.links {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(216px, 1fr));
  gap: clamp(10px, .5vw, 13px);
}
.link {
  display: flex; align-items: center; gap: 10px; min-width: 0;
  height: 54px; padding: 0 12px;
  background: var(--xh-bg);
  border: 1px solid var(--xh-border);
  border-radius: var(--xh-r-xl);
  box-shadow: var(--xh-shadow);
  transition: border-color var(--xh-dur-color) var(--xh-ease),
              box-shadow var(--xh-dur-color) var(--xh-ease),
              transform var(--xh-dur-move) var(--xh-ease);
}
.link:hover { border-color: var(--xh-border-strong); box-shadow: var(--xh-shadow-md); transform: translateY(-1px); }
.link:active { transform: scale(.99); }
.mono {
  display: grid; place-items: center;
  width: 26px; height: 26px; flex: 0 0 auto;
  border-radius: 7px;
  font-size: 12px; font-weight: 600; line-height: 1;
  user-select: none;
}
.mono[data-t="0"] { background: var(--xh-t0-bg); color: var(--xh-t0-fg); }
.mono[data-t="1"] { background: var(--xh-t1-bg); color: var(--xh-t1-fg); }
.mono[data-t="2"] { background: var(--xh-t2-bg); color: var(--xh-t2-fg); }
.mono[data-t="3"] { background: var(--xh-t3-bg); color: var(--xh-t3-fg); }
.mono[data-t="4"] { background: var(--xh-t4-bg); color: var(--xh-t4-fg); }
.mono[data-t="5"] { background: var(--xh-t5-bg); color: var(--xh-t5-fg); }
.mono-more { background: var(--xh-surface); color: var(--xh-muted); font-size: 10px; }
.link-meta { min-width: 0; display: flex; flex-direction: column; gap: 1px; }
.link-name {
  font-size: 13px; font-weight: 600; color: var(--xh-text);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.link-url {
  font-size: 11px; color: var(--xh-muted);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}

/* 键盘选中（搜索结果 ↑↓ 导航） */
.link.is-cursor, .folder.is-cursor {
  border-color: var(--xh-accent);
  box-shadow: 0 0 0 3px var(--xh-ring), var(--xh-shadow-md);
}

/* 列表视图 */
body[data-view="list"] .folders { grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); }
body[data-view="list"] .links { grid-template-columns: 1fr; }
body[data-view="list"] .link { height: 48px; }
body[data-view="list"] .link-meta { flex-direction: row; align-items: baseline; gap: 10px; }
body[data-view="list"] .link-name { flex: 0 1 auto; }
body[data-view="list"] .link-url { flex: 1 1 auto; }

/* 「展开全部」尾卡 */
.more-card {
  display: flex; align-items: center; justify-content: center; gap: 6px;
  height: 54px; border: 1px dashed var(--xh-border-strong); border-radius: var(--xh-r-xl);
  font-size: 12px; color: var(--xh-muted);
  transition: color var(--xh-dur-color) var(--xh-ease), border-color var(--xh-dur-color) var(--xh-ease);
}
.more-card:hover { color: var(--xh-accent-ink); border-color: var(--xh-accent); }

/* 分批加载的尾巴：滚到底自动接下一批，按钮只是兜底 */
.sect-note {
  margin-top: 10px; font-size: 12px; color: var(--xh-muted);
}

.loadmore {
  display: flex; align-items: center; justify-content: center;
  gap: 12px; flex-wrap: wrap;
  margin-top: 18px; padding-top: 18px;
  border-top: 1px dashed var(--xh-border);
}
.loadmore-btn {
  padding: 7px 16px;
  border: 1px solid var(--xh-border-strong);
  border-radius: 999px;
  background: var(--xh-bg); color: var(--xh-text);
  font-size: 12.5px; font-weight: 600;
  font-variant-numeric: tabular-nums;
  transition: border-color var(--xh-dur-color) var(--xh-ease),
              color var(--xh-dur-color) var(--xh-ease),
              background var(--xh-dur-color) var(--xh-ease);
}
.loadmore-btn:hover { border-color: var(--xh-accent); color: var(--xh-accent-ink); background: var(--xh-accent-tint); }
.loadmore-btn:active { transform: scale(.98); }
.loadmore-hint, .loadmore-end {
  font-size: 11.5px; color: var(--xh-muted);
  font-variant-numeric: tabular-nums;
}
.loadmore-end { padding: 4px 0; }

/* --------------------------------------------------------------------------
   10. 骨架屏 / 空态 / 错误态
   -------------------------------------------------------------------------- */
.xh-skeleton { padding: 4px 0; }
.sk-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(170px, 1fr)); gap: 10px; margin-bottom: 28px; }
.sk-links { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 10px; }
.sk {
  border-radius: var(--xh-r-xl);
  background: linear-gradient(90deg, var(--xh-surface) 25%, var(--xh-surface-2) 50%, var(--xh-surface) 75%);
  background-size: 200% 100%;
  animation: xh-shimmer 1.4s var(--xh-ease) infinite;
}
.sk-tile { height: 58px; }
.sk-row { height: 54px; }
@keyframes xh-shimmer { from { background-position: 200% 0; } to { background-position: -200% 0; } }

.state {
  max-width: 460px; margin: 48px auto; padding: 24px;
  border: 1px solid var(--xh-border); border-radius: var(--xh-r-2xl);
  background: var(--xh-bg); text-align: center;
}
.state svg { width: 32px; height: 32px; margin: 0 auto 12px; color: var(--xh-muted); }
.state h2 { font-size: 15px; font-weight: 600; }
.state p { margin: 6px 0 0; font-size: 13px; color: var(--xh-muted); }
.state .detail { display: block; margin-top: 6px; font-size: 11px; color: var(--xh-muted); opacity: .75; word-break: break-all; }
.state-btn {
  margin-top: 16px; padding: 8px 16px;
  border-radius: var(--xh-r-lg);
  background: var(--xh-text); color: var(--xh-page);
  font-size: 13px; font-weight: 600;
  transition: background var(--xh-dur-color) var(--xh-ease), transform var(--xh-dur-color) var(--xh-ease);
}
.state-btn:hover { background: var(--xh-accent); color: #fff; }
html.dark .state-btn { color: #0f141a; }
html.dark .state-btn:hover { background: var(--xh-accent); color: #08211a; }
.state-btn:active { transform: scale(.98); }

/* --------------------------------------------------------------------------
   11. 密码弹层（沿用原类名）
   -------------------------------------------------------------------------- */
.xh-pw-back {
  position: fixed; inset: 0; z-index: 130;
  display: grid; place-items: center; padding: 16px;
  background: rgba(12, 16, 22, .55);
  -webkit-backdrop-filter: blur(4px); backdrop-filter: blur(4px);
  animation: xh-fade var(--xh-dur-color) var(--xh-ease);
}
@keyframes xh-fade { from { opacity: 0; } to { opacity: 1; } }
.xh-pw {
  width: min(360px, 100%); padding: 24px;
  border-radius: var(--xh-r-2xl);
  background: var(--xh-bg); color: var(--xh-text);
  box-shadow: var(--xh-shadow-lg);
}
.xh-pw-title { font-size: 15px; font-weight: 600; }
.xh-pw-desc { margin: 6px 0 16px; font-size: 13px; color: var(--xh-muted); }
.xh-pw-input {
  width: 100%; padding: 9px 12px;
  border: 1px solid var(--xh-border-strong); border-radius: var(--xh-r-lg);
  background: var(--xh-surface); color: var(--xh-text);
  font-family: inherit; font-size: 14px;
}
.xh-pw-input:focus { outline: 0; border-color: var(--xh-accent); box-shadow: 0 0 0 3px var(--xh-ring); }
.xh-pw-error { margin: 8px 0 0; font-size: 11.5px; color: #d92d20; }
.xh-pw-actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 18px; }
.xh-pw-actions button { padding: 8px 16px; border-radius: var(--xh-r-lg); font-size: 13px; font-weight: 600; }
.xh-pw-cancel { background: var(--xh-surface); color: var(--xh-text); }
.xh-pw-cancel:hover { background: var(--xh-surface-2); }
.xh-pw-ok { background: var(--xh-text); color: var(--xh-page); }
.xh-pw-ok:hover { background: var(--xh-accent); color: #fff; }
html.dark .xh-pw-ok { color: #0f141a; }
html.dark .xh-pw-ok:hover { background: var(--xh-accent); color: #08211a; }

/* --------------------------------------------------------------------------
   12. 页脚
   -------------------------------------------------------------------------- */
.foot {
  margin-top: auto;
  border-top: 1px solid var(--xh-border);
  background: var(--xh-bg);
  font-size: 11px; color: var(--xh-muted);
}
.foot .wrap { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; padding-top: 18px; padding-bottom: 22px; }
.foot-links { margin-left: auto; display: flex; gap: 16px; }
.foot a:hover { color: var(--xh-accent-ink); }

/* --------------------------------------------------------------------------
   13. 移动端抽屉
   -------------------------------------------------------------------------- */
.drawer { position: fixed; inset: 0; z-index: 100; }
.drawer[hidden] { display: none; }
.drawer-back {
  position: absolute; inset: 0;
  background: rgba(12, 16, 22, .5);
  -webkit-backdrop-filter: blur(2px); backdrop-filter: blur(2px);
  opacity: 0; transition: opacity 220ms var(--xh-ease);
}
.drawer-panel {
  position: absolute; inset: 0 auto 0 0;
  width: min(300px, 86vw);
  display: flex; flex-direction: column;
  background: var(--xh-bg);
  border-right: 1px solid var(--xh-border);
  transform: translateX(-100%);
  transition: transform 260ms var(--xh-ease);
}
.drawer.is-open .drawer-back { opacity: 1; }
.drawer.is-open .drawer-panel { transform: none; }
.drawer-head { display: flex; align-items: center; gap: 8px; height: 56px; padding: 0 12px 0 16px; }
.drawer-head .brand { height: auto; padding: 0; }
.drawer-close {
  margin-left: auto; width: 34px; height: 34px;
  display: grid; place-items: center; border-radius: var(--xh-r-lg);
  color: var(--xh-muted);
}
.drawer-close:hover { background: var(--xh-surface); color: var(--xh-text); }
.drawer-close svg { width: 18px; height: 18px; }
.drawer .nav { padding-bottom: 12px; }

/* --------------------------------------------------------------------------
   14. 响应式
   -------------------------------------------------------------------------- */
@media (max-width: 1024px) {
  :root { --xh-sidebar: 0px; }
  .sidebar { display: none; }
  .shell { margin-left: 0; }
  .topbar { padding: 10px 0 8px; }
  .m-bar {
    display: flex; flex: 1 0 100%; align-items: center; gap: 8px;
    margin-bottom: 10px;
  }
  .m-bar .brand { height: auto; padding: 0; gap: 8px; }
  .m-bar .brand img { width: 22px; height: 22px; border-radius: 6px; }
  .m-bar .brand-name { font-size: 13.5px; }
  .m-icon {
    display: grid; place-items: center;
    width: 36px; height: 36px; flex: 0 0 auto;
    border-radius: var(--xh-r-lg);
    color: var(--xh-text-2);
  }
  .m-icon:hover { background: var(--xh-surface); }
  .m-icon svg { width: 19px; height: 19px; }
  .m-icon:last-child { margin-left: auto; }
  .wrap { padding: 0 var(--xh-s4); }
  .search-input { font-size: 14px; padding-right: 46px; }
  .search-kbd { display: none; }
  .engines {
    margin-bottom: 16px;
    -webkit-mask-image: linear-gradient(to right, #000 calc(100% - 30px), transparent 100%);
    mask-image: linear-gradient(to right, #000 calc(100% - 30px), transparent 100%);
  }
  .page-head { align-items: flex-start; margin-bottom: 18px; }
  .page-head h1 { font-size: 22px; }
  .page-sub { margin-top: 5px; }
  .view-switch { display: none; }
  .folders { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; }
  .folder { height: 62px; padding: 0 10px; gap: 9px; }
  /* 手机上也用两列分布，不再一行一个：390 下每张卡 175px，
     图标缩到 24、标题 12.5px、网址 10.5px，长网址照旧省略号收尾 */
  .links { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; }
  /* minmax(0,1fr) 而不是 1fr：1fr 的最小值是 auto，会被卡片内容撑破视口 */
  body[data-view="list"] .links { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .link { height: 56px; padding: 0 10px; gap: 8px; }
  .link .mono { width: 24px; height: 24px; border-radius: 6px; font-size: 11px; }
  .link-name { font-size: 12.5px; }
  .link-url { font-size: 10.5px; }
  .sect { margin-bottom: 22px; }
  .foot .wrap { padding-top: 14px; padding-bottom: 18px; }
  .foot-links { margin-left: 0; }
  /* 手机上「扫码打开」没有意义，打赏/反馈也退到次要位置 */
  #xh-fab .xh-fab-scan,
  #xh-fab .xh-fab-reward,
  #xh-fab .xh-fab-feedback { display: none; }
}


/* 桌面：给悬浮按钮留出呼吸空间，避免压住最后一列卡片 */
@media (min-width: 1025px) {
  /* 内容区右侧留一条通道给悬浮按钮（36px 按钮 + 14px 边距 + 间隙），
     自适应宽度后卡片会抵到视口右缘，不留这条通道就会被按钮压住 */
  .shell .wrap { padding-right: max(clamp(20px, 2.4vw, 40px), 62px); }
  #xh-fab { right: 14px; bottom: 14px; gap: 6px; }
  #xh-fab .xh-fab-btn { width: 36px; height: 36px; border-radius: 10px; opacity: .85; }
  #xh-fab .xh-fab-btn:hover { opacity: 1; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
    scroll-behavior: auto !important;
  }
}