:root{
  --paper:#f1ede3;
  --bg:#272725;
  --ink:#171614;
  --mono:"IBM Plex Mono",ui-monospace,SFMono-Regular,Consolas,monospace;
  --sans:"Inter Tight","Helvetica Neue",Arial,"PingFang SC","Noto Sans SC",sans-serif;
  --serif:"EB Garamond",Georgia,"Songti SC",serif;
  --pad:56px;
  --tab-h:30px;
  --band-h:46px;
  --ease:cubic-bezier(.22,1,.36,1);
}
*{box-sizing:border-box}
html{background:var(--bg);-webkit-text-size-adjust:100%}
body{
  margin:0;min-height:100vh;background:var(--bg);color:var(--ink);
  font-family:var(--sans);display:flex;justify-content:center;
  padding:clamp(14px,3vw,54px) clamp(8px,2vw,28px);overflow-x:clip;
}
.sheet{
  width:min(1120px,100%);min-width:0;background:var(--paper);
  border-radius:3px;box-shadow:0 36px 90px -40px rgba(0,0,0,.65);
  align-self:flex-start;overflow:hidden;
}

/* ---------- header ---------- */
.masthead{
  display:flex;align-items:flex-end;gap:24px;
  padding:18px var(--pad) 12px;
}
.mast-title{flex:1 1 auto;min-width:0}
.mast-search{
  flex:0 1 260px;max-width:280px;margin-bottom:2px;
  border-bottom:1px solid rgba(23,22,20,.2);
}
.mast-controls{flex:0 0 auto;margin-bottom:2px}
.eyebrow{
  font-family:var(--mono);font-size:10px;letter-spacing:.22em;
  text-transform:uppercase;color:#4c473e;margin-bottom:8px;
}
.masthead h1{
  margin:0;font-size:clamp(22px,2.4vw,30px);line-height:1.1;
  letter-spacing:-.028em;font-weight:500;
}

/* ---------- toolbar ---------- */
.search{
  display:flex;align-items:center;gap:10px;flex:1 1 220px;min-width:0;
  padding-bottom:6px;
}
.search svg{width:13px;height:13px;flex:0 0 auto;opacity:.55}
.search input{
  flex:1;min-width:0;border:0;background:transparent;outline:none;
  font-family:var(--mono);font-size:11px;letter-spacing:.04em;color:var(--ink);padding:2px 0;
}
.search input::placeholder{font-size:9.5px;letter-spacing:.16em;text-transform:uppercase;color:#6b6559}
.bar-right{display:flex;align-items:center;gap:9px;flex-wrap:wrap}
.chip{
  display:inline-flex;align-items:center;gap:7px;
  border:1px solid rgba(23,22,20,.28);border-radius:999px;background:transparent;
  padding:6px 12px;font-family:var(--mono);font-size:9.5px;letter-spacing:.13em;
  text-transform:uppercase;color:#2f2c27;cursor:pointer;
  transition:background-color .2s,color .2s,border-color .2s;
}
.chip span{opacity:.55}
.chip:hover{border-color:rgba(23,22,20,.5)}
.chip[aria-pressed="true"]{background:var(--ink);border-color:var(--ink);color:var(--paper)}
.sort{
  font-family:var(--mono);font-size:9.5px;letter-spacing:.13em;text-transform:uppercase;
  color:#2f2c27;display:inline-flex;align-items:center;gap:7px;margin-left:4px;
}
.sort select{
  border:0;background:transparent;outline:none;cursor:pointer;
  font:inherit;letter-spacing:inherit;text-transform:inherit;color:var(--ink);
}

/* ---------- topic entries ---------- */
.topics{
  display:flex;align-items:center;gap:22px;flex-wrap:wrap;
  padding:0 var(--pad);margin-bottom:calc(var(--tab-h) + 14px);
  min-height:34px;
}
.topics-label{
  font-family:var(--mono);font-size:9.5px;letter-spacing:.2em;
  text-transform:uppercase;color:#4c473e;white-space:nowrap;
}
.topics-count{opacity:.55;margin-left:5px}
.topics-list{
  display:flex;align-items:center;flex-wrap:wrap;
  margin:0;padding:0;list-style:none;
}
.topics-list li + li{margin-left:18px;padding-left:18px;border-left:1px solid rgba(23,22,20,.18)}
.topic-link{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13.5px;color:rgba(23,22,20,.72);
  text-decoration:none;white-space:nowrap;
  transition:color .2s;
}
.t-dot{
  flex:0 0 auto;width:5px;height:5px;border-radius:50%;background:var(--tc);
  transition:transform .2s var(--ease);
}
.topic-link:hover{color:var(--tc);text-decoration:underline;text-underline-offset:5px;text-decoration-thickness:1px}
.topic-link:hover .t-dot{transform:scale(1.5)}
.topic-link:focus-visible{outline:2px solid var(--tc);outline-offset:3px;border-radius:2px}

/* ---------- static intro (crawlable) ---------- */
.hub-intro{padding:0 var(--pad) 0;margin:36px 0 30px}
.hub-intro h2{
  margin:0 0 10px;font-family:var(--mono);font-size:9.5px;
  font-weight:400;letter-spacing:.18em;text-transform:uppercase;color:#4c473e;
}
.hub-intro p{
  margin:0 0 9px;max-width:660px;
  font-size:13.5px;line-height:1.72;color:#2f2c27;
}
.hub-intro p:last-child{margin-bottom:0}
.hub-fallback{padding:0 var(--pad) 8px}
.hub-fallback h2{
  margin:0 0 8px;font-family:var(--mono);font-size:9.5px;
  font-weight:400;letter-spacing:.18em;text-transform:uppercase;color:#4c473e;
}
.hub-fallback p{margin:12px 0 4px;font-family:var(--mono);font-size:9px;letter-spacing:.12em;text-transform:uppercase;color:#6b6559}
.hub-fallback ul{margin:0;padding-left:18px}
.hub-fallback li{margin:0 0 6px;font-size:12.5px;line-height:1.6}
.hub-fallback a{color:var(--ink)}
@media (max-width:760px){
  .hub-intro{margin:26px 0 22px}
  .hub-intro p{font-size:12.5px}
}
.site-foot{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  margin:34px var(--pad) 8px;padding-top:16px;
  border-top:1px solid rgba(23,22,20,.16);
  font-family:var(--mono);font-size:9.5px;letter-spacing:.14em;text-transform:uppercase;
}
.site-foot-label{color:#4c473e}
.site-foot nav{display:flex;gap:18px;flex-wrap:wrap}
.site-foot a{color:#2f2c27;text-decoration:none}
.site-foot a:hover{text-decoration:underline}

/* ---------- email subscribe ---------- */
.subscribe{margin:0 var(--pad) 0;padding:22px 0 6px;border-top:1px solid rgba(23,22,20,.3)}
.sub-kicker{
  display:block;margin-bottom:6px;
  font-family:var(--mono);font-size:9px;letter-spacing:.18em;
  text-transform:uppercase;color:#4c473e;
}
.subscribe h2{
  margin:0 0 6px;font-family:var(--serif);font-size:clamp(20px,2.6vw,26px);
  font-weight:500;line-height:1.15;letter-spacing:-.01em;color:var(--ink);
}
.subscribe p{
  margin:0;max-width:520px;font-size:13.5px;line-height:1.65;color:#2f2c27;
}
.nl-form{display:flex;gap:10px;margin:16px 0 8px;max-width:520px}
.nl-form[hidden]{display:none}
.nl-form input[type="email"]{
  flex:1;min-width:0;padding:11px 13px;
  border:1px solid rgba(23,22,20,.32);border-radius:2px;background:transparent;
  font-family:var(--sans);font-size:13.5px;color:var(--ink);
}
.nl-form input[type="email"]::placeholder{color:#8a8378}
.nl-form input[type="email"]:focus{outline:2px solid #34536e;outline-offset:1px}
.nl-form button{
  flex:0 0 auto;padding:11px 20px;border:0;border-radius:2px;cursor:pointer;
  background:var(--ink);color:var(--paper);
  font-family:var(--mono);font-size:9.5px;letter-spacing:.14em;text-transform:uppercase;
  transition:background-color .2s;
}
.nl-form button:hover{background:#34536e}
.nl-form button:disabled{cursor:default;opacity:.6}
.nl-status{margin:2px 0 0;max-width:520px;font-size:12.5px;line-height:1.6;color:#2f2c27}
.nl-status:empty{display:none}
.nl-status.is-ok{color:#2c6b45}
.nl-status.is-err{color:#a83b2b}
.nl-status a{color:inherit}
.sub-note{
  margin:0;font-family:var(--mono);font-size:9px;letter-spacing:.06em;
  text-transform:none;color:#6b6559;
}
.sub-note a{color:#4c473e}
@media (max-width:760px){
  .subscribe{margin-top:0}
  .nl-form{flex-wrap:wrap}
  .nl-form button{width:100%}
}
@media (max-width:760px){
  .topics{gap:6px 16px;min-height:0}
  .topics-list{width:100%}
  .topics-list li + li{margin-left:12px;padding-left:12px}
  .topic-link{font-size:13px}
}

/* ---------- category stack ---------- */
.stack{position:relative}
.cat{position:relative;height:var(--band-h);z-index:var(--z)}
.cat-bar{position:absolute;inset:0;background:var(--cc);overflow:hidden;transition:background-color .24s var(--ease)}
.cat-label{
  position:absolute;right:44px;top:0;height:100%;
  display:flex;align-items:center;gap:10px;
  font-family:var(--mono);font-size:9.5px;letter-spacing:.16em;
  text-transform:uppercase;color:var(--cf);opacity:.85;
}
.cat-count{opacity:.55}

/* tabs sitting on the top edge of each band */
.tabs{
  position:absolute;left:calc(var(--pad) - 60px);bottom:100%;
  display:flex;align-items:flex-end;gap:0;z-index:3;
  max-width:calc(100% - var(--pad) + 60px);overflow-x:auto;overflow-y:hidden;
  scrollbar-width:none;-ms-overflow-style:none;
}
.tabs::-webkit-scrollbar{display:none}
.tabs.is-dense .tab{padding:0 24px}
.tabs.is-dense .tab-label{font-size:clamp(15px,1.2vw,17px)}
.tabs.is-dense .tab .long{display:none}
.tabs.is-dense .tab .short{display:inline}
.cat.is-many .tabs{display:none}
.cat-more{
  display:none;margin-left:3px;padding:0 0 2px;border:0;border-bottom:1px solid currentColor;
  background:none;color:inherit;font:inherit;letter-spacing:inherit;text-transform:inherit;
  cursor:pointer;opacity:.75;
}
.cat.is-many .cat-more{display:inline-block}
.tab{
  position:relative;display:flex;align-items:flex-end;flex:0 0 auto;width:max-content;
  height:var(--tab-h);padding:0 68px;border:0;background:transparent;
  text-decoration:none;
  font-family:var(--serif);cursor:pointer;-webkit-tap-highlight-color:transparent;
}
.tab svg{position:absolute;inset:0;width:100%;height:100%;fill:var(--tc);pointer-events:none}
.tab + .tab{margin-left:-40px}
/* 同一排内左侧标签压住右侧标签，形成由左向右的叠压顺序 */
.tabs .tab:nth-child(1){z-index:9}
.tabs .tab:nth-child(2){z-index:8}
.tabs .tab:nth-child(3){z-index:7}
.tabs .tab:nth-child(4){z-index:6}
.tabs .tab:nth-child(5){z-index:5}
.tabs .tab:nth-child(6){z-index:4}
.tabs .tab:nth-child(7){z-index:3}
/* 悬停时该标签压在最上层，左右邻居都不遮住它 */
.tabs .tab:hover,.tabs .tab:focus-visible{z-index:20}
.tab-label{
  position:relative;z-index:1;padding-bottom:4px;
  font-family:var(--serif);font-size:clamp(18px,1.55vw,22px);line-height:1;font-weight:400;
  letter-spacing:0;white-space:nowrap;color:var(--tf);
}
.tab:hover .tab-label{text-decoration:underline;text-underline-offset:6px;text-decoration-thickness:2px}
.tab:focus-visible{outline:none}
.tab:focus-visible .tab-label{text-decoration:underline;text-underline-offset:6px;text-decoration-thickness:2px}
.tab[aria-current="true"] .tab-label{text-decoration:underline;text-underline-offset:6px;text-decoration-thickness:2px}
.tab .short{display:none}

/* ---------- detail panel ---------- */
.panel{
  --pc:#1c4ed8;--pf:#f4f0e6;
  position:relative;min-height:348px;
  display:flex;flex-direction:column;justify-content:space-between;
  gap:40px;padding:42px var(--pad) 44px;
  background:var(--pc);color:var(--pf);
  transition:background-color .55s var(--ease),color .4s var(--ease);
}
.panel-top{
  display:flex;justify-content:space-between;gap:20px;
  font-family:var(--mono);font-size:9.5px;letter-spacing:.16em;
  text-transform:uppercase;opacity:.78;
}
.panel-right{display:flex;align-items:center;gap:12px}
.fav-hint{opacity:.62;letter-spacing:.1em}
.fav{
  width:24px;height:24px;padding:0;border:1px solid currentColor;border-radius:999px;
  background:transparent;color:inherit;font-size:11px;line-height:1;
  display:grid;place-items:center;cursor:pointer;opacity:.8;
  transition:background-color .2s,opacity .2s;
}
.fav:hover{opacity:1;background:rgba(255,255,255,.12)}
.panel-detail{flex:1;display:flex;flex-direction:column;justify-content:space-between;gap:40px}
.panel-detail[hidden]{display:none}
.panel-main{max-width:660px}
.panel-eyebrow{
  font-family:var(--mono);font-size:10px;letter-spacing:.18em;
  text-transform:uppercase;opacity:.72;margin-bottom:16px;
}
.panel h2{
  margin:0 0 18px;font-size:clamp(30px,4.2vw,48px);line-height:1.02;
  letter-spacing:-.03em;font-weight:500;
}
.panel p{
  margin:0;max-width:560px;font-family:var(--mono);
  font-size:12px;line-height:1.95;opacity:.92;
}
.panel-bottom{display:flex;justify-content:space-between;align-items:flex-end;gap:22px;flex-wrap:wrap}
.cta{
  display:inline-flex;align-items:center;gap:12px;padding:13px 22px;
  border:1px solid currentColor;border-radius:999px;
  color:inherit;text-decoration:none;
  font-family:var(--mono);font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;
  transition:background-color .25s,color .25s;
}
.cta svg{width:11px;height:11px;transition:transform .35s var(--ease)}
.cta:hover{background:rgba(255,255,255,.14)}
.cta:hover svg{transform:translate(2px,-2px)}
.panel-note{font-family:var(--mono);font-size:9.5px;letter-spacing:.14em;text-transform:uppercase;opacity:.55;line-height:1.9;text-align:right}

/* ---------- grid mode (many sites / search / saved) ---------- */
.panel.is-topic .fav,
.panel.is-topic .fav-hint{display:none}
.panel.is-grid{
  justify-content:flex-start;gap:26px;
  background:var(--paper);color:var(--ink);
}
.panel.is-grid .panel-top{opacity:.62}
.panel.is-grid .fav,
.panel.is-grid .fav-hint{display:none}
.grid{
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;width:100%;
}
.grid[hidden]{display:none}
.grid-empty{
  margin:0;font-family:var(--mono);font-size:11px;line-height:1.9;
  letter-spacing:.06em;opacity:.6;
}
.card{
  position:relative;display:flex;flex-direction:column;gap:7px;
  padding:18px 18px 16px 22px;text-align:left;
  background:#f8f4ea;border:1px solid rgba(23,22,20,.13);border-radius:2px;
  color:var(--ink);font:inherit;cursor:pointer;
  transition:border-color .2s,background-color .2s;
}
.card::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:var(--tc);
}
.card:hover{background:#fffdf7;border-color:rgba(23,22,20,.38)}
.card-cat{font-family:var(--mono);font-size:8.5px;letter-spacing:.16em;text-transform:uppercase;color:#6f6a60}
.card-name{font-family:var(--serif);font-size:22px;line-height:1.08;font-weight:500}
.card-host{font-family:var(--mono);font-size:9px;letter-spacing:.06em;color:#7a756a}
.card-desc{
  font-family:var(--mono);font-size:10.5px;line-height:1.75;color:#3f3b34;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.card-go{
  margin-top:auto;padding-top:10px;
  font-family:var(--mono);font-size:9px;letter-spacing:.14em;text-transform:uppercase;color:#6f6a60;
}

/* ---------- small screens ---------- */
@media (max-width:1000px){
  .grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:760px){
  :root{--pad:20px;--tab-h:46px;--band-h:42px}
  .masthead{flex-direction:column;align-items:stretch;gap:12px;padding:16px var(--pad) 14px}
  .mast-search{flex:none;width:100%;max-width:none;margin-bottom:0;padding:6px 0 10px;min-height:44px}
  .search input{font-size:16px}
  .search input::placeholder{font-size:11px;letter-spacing:.1em}
  .mast-controls{justify-content:flex-start;margin-bottom:0}
  .bar-right{gap:8px}
  .chip{padding:10px 14px;font-size:11px;letter-spacing:.08em;min-height:44px}
  .sort{font-size:11px;margin-left:2px}
  .sort select{padding:10px 2px;font-size:11px;min-height:44px}

  /* 目录条：加大点击区，窄屏去掉竖线分隔 */
  .topics{gap:2px 16px}
  .topics-label{font-size:11px}
  .topics-list{gap:0 16px;width:100%}
  .topics-list li + li{margin-left:0;padding-left:0;border-left:0}
  .topic-link{font-size:14px;min-height:44px}

  /* 触屏：标签改为静态排布，可换行，不再叠压在色带上方 */
  .cat{height:auto;display:flex;flex-direction:column-reverse}
  .cat-bar{position:relative;inset:auto;height:var(--band-h);flex:0 0 auto}
  .tabs{
    position:static;left:auto;bottom:auto;max-width:none;width:auto;
    flex-wrap:wrap;align-items:flex-end;gap:6px 4px;
    padding:0 var(--pad);overflow:visible;
  }
  .tab{padding:0 12px}
  .tab + .tab{margin-left:0}
  .tabs.is-dense .tab{padding:0 12px}
  .tab-label,.tabs.is-dense .tab-label{font-size:16px;padding-bottom:8px}
  .tab .long{display:none}
  .tab .short{display:inline}
  .cat-label{right:var(--pad);top:auto;bottom:0;height:var(--band-h);font-size:10.5px;letter-spacing:.1em;gap:7px}
  .cat-more{padding:12px 0}

  .grid{grid-template-columns:1fr;gap:8px}
  .card{padding:16px 16px 14px 20px;gap:6px}
  .card-cat{font-size:10px}
  .card-name{font-size:20px}
  .card-host{font-size:11px}
  .card-desc{font-size:12.5px;-webkit-line-clamp:2}
  .card-go{font-size:11px}
  .panel.is-grid{padding-top:24px;gap:20px}
  .panel{min-height:240px;padding:26px var(--pad) 28px;gap:20px}
  .panel-top{font-size:11px;letter-spacing:.12em}
  .panel h2{font-size:27px;margin-bottom:14px}
  .panel-eyebrow{font-size:11px;margin-bottom:12px}
  .panel p{font-size:15px;line-height:1.75}
  .panel-note{font-size:11px;text-align:left}
  .fav{width:32px;height:32px;font-size:13px}
  .cta{padding:14px 20px;font-size:12px;min-height:44px}
  .grid-empty{font-size:13px}
}
@media (max-width:560px){
  .topics-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0}
  .topic-link{font-size:14px}
}
@media (max-width:400px){
  .tab{padding:0 9px}
  .tab-label,.tabs.is-dense .tab-label{font-size:15px}
  .topic-link{font-size:13px}
}
@media (prefers-reduced-motion:reduce){
  .panel,.cta,.cta svg{transition-duration:.01ms}
}