/* ==========================================================================
   LKS 推荐合集 · 按功能分类
   纸质浅色 + 分类色编码，零外部依赖（无 CDN / 无 webfont / 无图标字体）
   ========================================================================== */

:root {
  --paper: #faf8f4;
  --paper-2: #f3efe7;
  --card: #ffffff;
  --ink: #1b1a17;
  --ink-2: #5b564c;
  --ink-3: #918a7d;
  --line: #e6e1d6;
  --line-2: #d3ccbd;
  --radius: 14px;
  --radius-lg: 20px;
  --shadow: 0 1px 2px rgba(27, 26, 23, .04), 0 8px 24px -16px rgba(27, 26, 23, .18);
  --shadow-hi: 0 2px 4px rgba(27, 26, 23, .05), 0 18px 40px -22px rgba(27, 26, 23, .28);
  --serif: "Songti SC", "Noto Serif SC", "Source Han Serif SC", Georgia, "Times New Roman", serif;
  --sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB",
          "Noto Sans SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  --maxw: 1180px;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

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

body {
  margin: 0;
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.65;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

/* 纸纹：极淡的斜线，避免大面积纯色发闷 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background-image: repeating-linear-gradient(
    135deg, rgba(27, 26, 23, .012) 0 1px, transparent 1px 7px);
}

a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; }
h1, h2, h3, h4 { margin: 0; font-weight: 600; letter-spacing: -.01em; line-height: 1.25; }
p { margin: 0; }
input, select { font: inherit; color: inherit; }

.wrap { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 26px; position: relative; z-index: 1; }

.skip {
  position: absolute; left: -9999px; top: 0; z-index: 99;
  background: var(--ink); color: #fff; padding: 10px 16px; border-radius: 0 0 8px 0;
}
.skip:focus { left: 0; }

/* ---------------------------------------------------------------- 导航 */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(250, 248, 244, .86);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--line);
}
.nav-in {
  max-width: var(--maxw); margin: 0 auto; padding: 0 26px;
  height: 62px; display: flex; align-items: center; gap: 22px;
}
.brand { display: flex; align-items: center; gap: 9px; font-weight: 600; font-size: 15px; letter-spacing: -.01em; white-space: nowrap; }
.mark {
  display: grid; place-items: center; width: 26px; height: 26px; border-radius: 7px;
  background: var(--ink); color: #fff; font-family: var(--serif); font-size: 15px; line-height: 1;
  padding-bottom: 2px;
}
.nav-links { display: flex; align-items: center; gap: 4px; margin-left: 6px; }
.nav-links > a {
  padding: 7px 11px; border-radius: 8px; font-size: 14px; color: var(--ink-2);
  display: inline-flex; align-items: center; gap: 5px; transition: .16s;
}
.nav-links > a:hover { color: var(--ink); background: rgba(27, 26, 23, .05); }
.nav-links > a.on { color: var(--ink); background: rgba(27, 26, 23, .07); font-weight: 600; }
.fav-n {
  min-width: 17px; height: 17px; padding: 0 5px; border-radius: 9px;
  background: var(--ink); color: #fff; font-size: 11px; line-height: 17px; text-align: center; font-weight: 600;
}

.nav-search {
  margin-left: auto; display: flex; align-items: center; gap: 8px;
  background: #fff; border: 1px solid var(--line); border-radius: 10px;
  padding: 0 10px; height: 38px; width: 254px; transition: .18s;
}
.nav-search:focus-within { border-color: var(--ink-3); box-shadow: 0 0 0 3px rgba(27, 26, 23, .05); }
.nav-search svg { width: 15px; height: 15px; flex: none; fill: none; stroke: var(--ink-3); stroke-width: 1.7; }
.nav-search input { border: 0; outline: 0; background: none; width: 100%; font-size: 13.5px; }
.nav-search input::placeholder { color: var(--ink-3); }
.nav-search kbd {
  font-family: var(--mono); font-size: 11px; color: var(--ink-3);
  border: 1px solid var(--line); border-radius: 4px; padding: 0 5px; line-height: 17px;
}

.nav-toggle {
  display: none; margin-left: auto; border: 1px solid var(--line); background: #fff;
  border-radius: 9px; padding: 7px 12px; font-size: 13.5px; cursor: pointer;
}
.nav-drop {
  display: none; border-top: 1px solid var(--line); background: var(--paper);
  max-height: 0; overflow: hidden; transition: max-height .24s ease;
}
.nav-drop.open { max-height: 420px; }
.nav-drop-in {
  max-width: var(--maxw); margin: 0 auto; padding: 10px 26px 16px;
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 2px 10px;
}
.nav-drop-in a {
  display: flex; align-items: center; gap: 8px; padding: 9px 6px; font-size: 14px;
  border-radius: 7px; color: var(--ink-2);
}
.nav-drop-in a:hover { background: rgba(27, 26, 23, .05); color: var(--ink); }
.nav-drop-in i { width: 7px; height: 7px; border-radius: 50%; background: var(--h); flex: none; }
.nav-drop-in b { margin-left: auto; font-size: 12px; color: var(--ink-3); font-weight: 500; }

/* ---------------------------------------------------------------- 首页 Hero */
.hero { padding: 74px 0 62px; border-bottom: 1px solid var(--line); position: relative; overflow: hidden; }
.hero::after {
  content: ""; position: absolute; right: -140px; top: -120px; width: 460px; height: 460px;
  border-radius: 50%; background: radial-gradient(circle, rgba(91, 98, 201, .10), transparent 68%);
  pointer-events: none;
}
.eyebrow {
  font-size: 12px; letter-spacing: .16em; text-transform: uppercase;
  color: var(--ink-3); font-weight: 600; margin-bottom: 20px;
}
.hero h1 {
  font-family: var(--serif); font-weight: 600;
  font-size: clamp(30px, 4.6vw, 54px); line-height: 1.18; letter-spacing: -.02em;
  margin-bottom: 20px;
}
.hero h1 .hl {
  white-space: nowrap;
  background-image: linear-gradient(to top, rgba(192, 122, 40, .26) 0 .30em, transparent .30em);
  background-repeat: no-repeat;
  padding: 0 .04em;
}
.lede { font-size: 16px; color: var(--ink-2); max-width: 620px; line-height: 1.75; }
.lede b { color: var(--ink); font-weight: 600; }

.hero-search {
  margin-top: 30px; display: flex; align-items: center; gap: 10px;
  background: #fff; border: 1px solid var(--line-2); border-radius: 13px;
  padding: 6px 6px 6px 16px; max-width: 560px; box-shadow: var(--shadow);
}
.hero-search:focus-within { border-color: var(--ink); box-shadow: 0 0 0 3px rgba(27, 26, 23, .06); }
.hero-search svg { width: 17px; height: 17px; flex: none; fill: none; stroke: var(--ink-3); stroke-width: 1.7; }
.hero-search input { flex: 1; border: 0; outline: 0; background: none; font-size: 15px; min-width: 0; }
.hero-search input::placeholder { color: var(--ink-3); }
.hero-search button {
  border: 0; background: var(--ink); color: #fff; border-radius: 9px;
  padding: 10px 20px; font-size: 14px; font-weight: 500; cursor: pointer; transition: .16s;
}
.hero-search button:hover { background: #37342c; }

.stats { list-style: none; display: flex; gap: 34px; margin: 34px 0 0; padding: 0; }
.stats li { display: flex; align-items: baseline; gap: 7px; }
.stats b { font-family: var(--serif); font-size: 26px; font-weight: 600; letter-spacing: -.02em; }
.stats span { font-size: 13px; color: var(--ink-3); }

/* ---------------------------------------------------------------- 区块 */
.block { padding: 62px 0; }
.block-alt { background: var(--paper-2); border-block: 1px solid var(--line); }
.block-head { display: flex; flex-wrap: wrap; align-items: flex-end; gap: 8px 18px; margin-bottom: 28px; }
.block-head h2 { font-family: var(--serif); font-size: clamp(22px, 2.4vw, 29px); font-weight: 600; }
.block-sub { font-size: 14px; color: var(--ink-2); flex: 1; min-width: 260px; }
.more { font-size: 13.5px; color: var(--ink-2); border-bottom: 1px solid var(--line-2); padding-bottom: 2px; transition: .16s; }
.more:hover { color: var(--ink); border-color: var(--ink); }

/* 分类宫格 */
.cat-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 14px; }
.cat-card {
  position: relative; display: flex; gap: 15px; align-items: flex-start;
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 20px 20px 18px; transition: transform .18s ease, box-shadow .18s ease, border-color .18s;
  overflow: hidden;
}
.cat-card::before {
  content: ""; position: absolute; inset: 0 auto 0 0; width: 3px;
  background: var(--h); opacity: .3; transform: scaleY(.55); transform-origin: top;
  transition: opacity .26s ease, transform .26s ease;
}
.cat-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-hi); border-color: color-mix(in srgb, var(--h) 28%, var(--line)); }
.cat-card:hover::before { opacity: .95; transform: scaleY(1); }
.cat-glyph {
  flex: none; width: 46px; height: 46px; border-radius: 12px;
  display: grid; place-items: center;
  background: color-mix(in srgb, var(--h) 11%, #fff);
  color: var(--h); font-family: var(--serif); font-size: 21px; font-weight: 600; letter-spacing: -.02em;
  border: 1px solid color-mix(in srgb, var(--h) 16%, #fff);
}
.cat-glyph.big { width: 64px; height: 64px; border-radius: 16px; font-size: 28px; }
.cat-body { min-width: 0; }
.cat-body h3 { font-size: 17px; display: flex; align-items: center; gap: 9px; }
.cat-n {
  font-family: var(--mono); font-size: 11px; font-weight: 500; color: var(--ink-3);
  background: var(--paper-2); border-radius: 20px; padding: 1px 8px; letter-spacing: 0;
}
.cat-body p { font-size: 13.5px; color: var(--ink-2); margin-top: 5px; }
.cat-sample { display: block; font-size: 12.5px; color: var(--ink-3); margin-top: 10px; }
.cat-go {
  position: absolute; right: 18px; bottom: 16px; color: var(--h); opacity: 0;
  transform: translateX(-4px); transition: .2s; font-size: 16px;
}
.cat-card:hover .cat-go { opacity: 1; transform: translateX(0); }

/* ---------------------------------------------------------------- 站点卡片 */
.grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(262px, 1fr));
  gap: 13px; align-items: stretch;
}
.site {
  position: relative; display: flex; flex-direction: column;
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 17px 17px 13px; min-height: 158px;
  transition: transform .17s ease, box-shadow .17s ease, border-color .17s;
}
.site:hover {
  transform: translateY(-2px); box-shadow: var(--shadow-hi);
  border-color: color-mix(in srgb, var(--h) 26%, var(--line));
}
.site-hit { position: absolute; inset: 0; z-index: 1; border-radius: var(--radius); }
.site-head { display: flex; align-items: center; gap: 9px; margin-bottom: 11px; }
.site-av {
  width: 30px; height: 30px; border-radius: 8px; flex: none;
  display: grid; place-items: center;
  background: color-mix(in srgb, var(--h) 12%, #fff);
  color: var(--h); font-family: var(--serif); font-size: 15px; font-weight: 600;
  border: 1px solid color-mix(in srgb, var(--h) 14%, #fff);
}
.site-ep {
  font-family: var(--mono); font-size: 10.5px; letter-spacing: .02em;
  color: var(--ink-3); background: var(--paper-2); border-radius: 4px; padding: 1px 6px;
}
.site-t { font-size: 15.5px; font-weight: 600; line-height: 1.4; }
.site-d {
  font-size: 13px; color: var(--ink-2); line-height: 1.6; margin-top: 5px; flex: 1;
  min-height: 3.2em;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.site-foot {
  display: flex; align-items: center; justify-content: space-between; gap: 8px;
  margin-top: 12px; padding-top: 10px; border-top: 1px dashed var(--line);
  font-size: 11.5px; color: var(--ink-3);
}
.site-cat { color: color-mix(in srgb, var(--h) 78%, var(--ink)); opacity: .82; }
/* 分类页内已有类名 → 改用原标签；全部/收藏页 → 用分类名 */
.site-origin { color: var(--ink-3); }
.site-cat { display: none; }
[data-cat="all"] .site-cat, [data-cat="fav"] .site-cat { display: inline; }
[data-cat="all"] .site-origin, [data-cat="fav"] .site-origin { display: none; }
.site-open { opacity: .5; transition: .18s; color: var(--h); font-weight: 500; }
.site:hover .site-open { opacity: 1; }

.star {
  position: absolute; top: 12px; right: 12px; z-index: 2;
  width: 26px; height: 26px; border: 0; border-radius: 7px; background: none;
  color: var(--line-2); font-size: 14px; line-height: 1; cursor: pointer;
  opacity: .28; transition: .16s; display: grid; place-items: center;
}
.site:hover .star, .star:focus-visible, .star[aria-pressed="true"] { opacity: 1; }
.star:hover { background: var(--paper-2); color: #c99a2e; transform: scale(1.08); }
.star[aria-pressed="true"] { color: #d9a521; }

/* ---------------------------------------------------------------- 分类页 */
.cat-top { padding-top: 26px; }
.crumb { display: flex; align-items: center; gap: 8px; font-size: 12.5px; color: var(--ink-3); margin-bottom: 18px; }
.crumb a:hover { color: var(--ink); }
.crumb b { color: var(--ink-2); font-weight: 500; }
.cat-hero { display: flex; align-items: flex-start; gap: 20px; padding-bottom: 26px; }
.cat-hero h1 { font-family: var(--serif); font-size: clamp(26px, 3.4vw, 38px); font-weight: 600; letter-spacing: -.02em; }
.cat-hero p { font-size: 14.5px; color: var(--ink-2); margin-top: 7px; max-width: 620px; }
.cat-meta { list-style: none; display: flex; flex-wrap: wrap; gap: 0; margin: 13px 0 0; padding: 0; font-size: 12.5px; color: var(--ink-3); }
.cat-meta li + li::before { content: "·"; margin: 0 9px; color: var(--line-2); }

.tabs { display: flex; flex-wrap: wrap; gap: 6px; padding-bottom: 20px; border-bottom: 1px solid var(--line); }
.tab {
  display: inline-flex; align-items: center; gap: 6px; font-size: 13px; color: var(--ink-2);
  padding: 6px 10px; border-radius: 9px; border: 1px solid transparent; transition: .16s;
}
.tab b { font-size: 11px; color: var(--ink-3); font-weight: 500; font-family: var(--mono); }
.tab:hover { background: #fff; border-color: var(--line); color: var(--ink); }
.tab.on {
  background: #fff; border-color: color-mix(in srgb, var(--h) 30%, var(--line));
  color: var(--ink); font-weight: 600; box-shadow: var(--shadow);
}
.tab.on b { color: var(--h); }

.chips { display: flex; flex-wrap: wrap; gap: 7px; padding-bottom: 20px; border-bottom: 1px solid var(--line); }
.chip {
  display: inline-flex; align-items: center; gap: 7px; cursor: pointer;
  background: #fff; border: 1px solid var(--line); border-radius: 9px;
  padding: 6px 11px; font-size: 13px; color: var(--ink-2); transition: .16s;
}
.chip b { font-size: 11px; color: var(--ink-3); font-weight: 500; font-family: var(--mono); }
.chip:hover { border-color: var(--line-2); color: var(--ink); }
.chip.on { border-color: var(--ink); color: var(--ink); font-weight: 600; background: var(--paper-2); }
.chip.on b { color: var(--ink); }

.toolbar {
  display: flex; flex-wrap: wrap; align-items: center; gap: 9px;
  padding: 18px 0 16px; position: sticky; top: 62px; z-index: 20;
  background: linear-gradient(var(--paper) 72%, rgba(250, 248, 244, 0));
}
.tb-search {
  display: flex; align-items: center; gap: 8px; flex: 1; min-width: 200px;
  background: #fff; border: 1px solid var(--line); border-radius: 9px; padding: 0 11px; height: 38px;
}
.tb-search:focus-within { border-color: var(--ink-3); box-shadow: 0 0 0 3px rgba(27, 26, 23, .05); }
.tb-search svg { width: 15px; height: 15px; flex: none; fill: none; stroke: var(--ink-3); stroke-width: 1.7; }
.tb-search input { border: 0; outline: 0; background: none; width: 100%; font-size: 13.5px; }
.toolbar select {
  height: 38px; border: 1px solid var(--line); border-radius: 9px; background: #fff;
  padding: 0 30px 0 11px; font-size: 13px; color: var(--ink-2); cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 12'%3E%3Cpath d='M2.5 4.5 6 8l3.5-3.5' fill='none' stroke='%23918a7d' stroke-width='1.5' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 10px center; background-size: 12px;
}
.toolbar select:focus { outline: 0; border-color: var(--ink-3); }
.tb-count { margin-left: auto; font-size: 12.5px; color: var(--ink-3); font-family: var(--mono); }

.empty { text-align: center; color: var(--ink-3); font-size: 14px; padding: 60px 0; }
.empty-state { text-align: center; padding: 70px 0 40px; min-height: 42vh; display: grid; align-content: center; }
.empty-t { font-family: var(--serif); font-size: 19px; color: var(--ink-2); }
.empty-d { font-size: 13.5px; color: var(--ink-3); margin-top: 8px; }
.empty-d a { border-bottom: 1px solid var(--line-2); }
.empty-d a:hover { color: var(--ink); }

.pager {
  display: grid; grid-template-columns: 1fr 1fr; gap: 13px;
  margin: 46px 0 10px; padding-top: 26px; border-top: 1px solid var(--line);
}
.pager-item {
  display: flex; flex-direction: column; gap: 5px; padding: 16px 18px;
  border: 1px solid var(--line); border-radius: var(--radius); background: #fff; transition: .17s;
}
.pager-item:hover { box-shadow: var(--shadow-hi); transform: translateY(-2px); border-color: var(--line-2); }
.pager-item small { font-size: 11.5px; color: var(--ink-3); }
.pager-item span { font-size: 15px; font-weight: 600; color: color-mix(in srgb, var(--h) 70%, var(--ink)); }
.pager-item.next { text-align: right; align-items: flex-end; }
.pager-hint { margin: 30px 0 60px; font-size: 13.5px; color: var(--ink-3); }
.pager-hint a:hover { color: var(--ink); }

/* ---------------------------------------------------------------- 使用说明 */
.how { max-width: 820px; }
.how h2 { font-family: var(--serif); font-size: clamp(22px, 2.4vw, 28px); margin-bottom: 22px; }
.how-list { margin: 0; padding-left: 22px; color: var(--ink-2); font-size: 14.5px; line-height: 1.9; }
.how-list li { padding-left: 4px; }
.how-list li + li { margin-top: 8px; }
.how-list b { color: var(--ink); }
.how-list code {
  font-family: var(--mono); font-size: 12.5px; background: var(--paper-2);
  border: 1px solid var(--line); border-radius: 5px; padding: 1px 5px; color: var(--ink-2);
}

/* ---------------------------------------------------------------- 页脚 */
.foot { border-top: 1px solid var(--line); background: var(--paper-2); padding: 40px 0 46px; margin-top: 20px; }
.foot-in {
  max-width: var(--maxw); margin: 0 auto; padding: 0 26px;
  display: flex; flex-wrap: wrap; gap: 26px; justify-content: space-between;
}
.foot-brand { display: flex; align-items: center; gap: 8px; font-weight: 600; font-size: 14px; margin-bottom: 10px; }
.foot-note { font-size: 12.5px; color: var(--ink-3); line-height: 1.8; max-width: 560px; }
.foot-note a { border-bottom: 1px solid var(--line-2); }
.foot-note a:hover { color: var(--ink); }
.foot-links { display: flex; flex-direction: column; gap: 7px; font-size: 13px; color: var(--ink-2); }
.foot-links a:hover { color: var(--ink); }

/* ---------------------------------------------------------------- 响应式 */
@media (max-width: 900px) {
  .nav-search { width: 190px; }
  .nav-links > a { padding: 7px 8px; }
}
@media (max-width: 720px) {
  body { font-size: 14.5px; }
  .wrap, .nav-in, .foot-in { padding-left: 18px; padding-right: 18px; }
  .nav-links, .nav-search { display: none; }
  .nav-toggle { display: block; }
  .nav-drop { display: block; }
  .hero { padding: 46px 0 42px; }
  .stats { gap: 20px; }
  .stats b { font-size: 21px; }
  .block { padding: 44px 0; }
  .cat-grid { grid-template-columns: 1fr; }
  .grid { grid-template-columns: 1fr; gap: 10px; }
  .toolbar { top: 62px; }
  .tb-count { display: none; }
  .cat-hero { gap: 14px; }
  .cat-glyph.big { width: 52px; height: 52px; font-size: 23px; border-radius: 13px; }
  .pager { grid-template-columns: 1fr; }
  .hero-search { padding-left: 13px; }
  .hero-search button { padding: 9px 15px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
}