@charset "UTF-8";

/* ===== self-hosted CJK subset font =====
   只用页面实际出现的 731 个字符做子集（1106KB → 102KB）
   这样即使访客系统没装中文字体，也能正常显示 */
@font-face{
  font-family:"dsh-cjk";
  src:url("font.woff2") format("woff2");
  font-weight:100 900;
  font-style:normal;
  font-display:swap;
}

:root{
  --bg:#0b0e14; --bg2:#11151f; --card:#151a26; --line:#242c3d;
  --fg:#e6ebf5; --fg2:#9aa7bd; --fg3:#6b7789;
  --acc:#4d8dff; --acc2:#7c5cff; --ok:#3ddc97; --warn:#ffb454; --err:#ff6b81;
  --code-bg:#0d1117; --radius:14px;
  --mono:"SF Mono",Menlo,Consolas,"JetBrains Mono","Courier New",monospace;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  background:var(--bg); color:var(--fg);
  font-family:"dsh-cjk",-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC","Source Han Sans SC","WenQuanYi Micro Hei","Heiti SC","Droid Sans Fallback",sans-serif;
  line-height:1.75; -webkit-font-smoothing:antialiased;
  background-image:
    radial-gradient(900px 500px at 12% -8%, rgba(77,141,255,.13), transparent 60%),
    radial-gradient(800px 460px at 92% 4%, rgba(124,92,255,.12), transparent 62%);
  background-attachment:fixed;
}
a{color:var(--acc);text-decoration:none}
.wrap{max-width:1140px;margin:0 auto;padding:0 24px}

/* ---------- nav ---------- */
nav{position:sticky;top:0;z-index:50;backdrop-filter:blur(14px);
  background:rgba(11,14,20,.82);border-bottom:1px solid var(--line)}
.navin{max-width:1140px;margin:0 auto;padding:14px 24px;display:flex;align-items:center;gap:18px}
.logo{font-weight:700;font-size:16px;letter-spacing:-.3px;display:flex;align-items:center;gap:9px}
.logo .dot{width:9px;height:9px;border-radius:50%;background:linear-gradient(135deg,var(--acc),var(--acc2));
  box-shadow:0 0 12px rgba(77,141,255,.8)}
.navin .sp{flex:1}
.navin a.lk{color:var(--fg2);font-size:13.5px;padding:6px 11px;border-radius:8px;transition:.18s}
.navin a.lk:hover{color:var(--fg);background:rgba(255,255,255,.05)}

/* ---------- hero ---------- */
header{padding:76px 0 54px;position:relative;overflow:hidden}
.tag{display:inline-flex;align-items:center;gap:8px;font-size:12px;font-weight:600;
  color:var(--acc);background:rgba(77,141,255,.1);border:1px solid rgba(77,141,255,.28);
  padding:5px 13px;border-radius:99px;margin-bottom:22px;letter-spacing:.3px}
h1{font-size:clamp(32px,5.4vw,50px);line-height:1.16;letter-spacing:-1.4px;font-weight:800;margin-bottom:20px}
h1 .grad{background:linear-gradient(96deg,var(--acc) 12%,var(--acc2) 62%,#ff7ab6 100%);
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.lead{font-size:17.5px;color:var(--fg2);max-width:760px;line-height:1.85}
.meta{display:flex;flex-wrap:wrap;gap:9px;margin-top:26px}
.chip{font-size:12.5px;color:var(--fg2);background:var(--card);border:1px solid var(--line);
  padding:5px 12px;border-radius:8px;font-family:var(--mono)}

/* ---------- section ---------- */
section{padding:42px 0}
.sec-h{display:flex;align-items:center;gap:12px;margin-bottom:26px}
.sec-h h2{font-size:24px;letter-spacing:-.6px;font-weight:700}
.sec-h .bar{width:3px;height:22px;border-radius:2px;background:linear-gradient(180deg,var(--acc),var(--acc2))}

/* ---------- post cards ---------- */
.grid{display:grid;gap:18px}
.card{display:block;background:linear-gradient(160deg,var(--card),var(--bg2));
  border:1px solid var(--line);border-radius:var(--radius);padding:26px 26px 24px;
  transition:.22s cubic-bezier(.4,0,.2,1);position:relative;overflow:hidden}
.card::before{content:"";position:absolute;inset:0 0 auto 0;height:2px;
  background:linear-gradient(90deg,var(--acc),var(--acc2));opacity:0;transition:.22s}
.card:hover{transform:translateY(-3px);border-color:rgba(77,141,255,.45);
  box-shadow:0 16px 44px -16px rgba(0,0,0,.7),0 0 0 1px rgba(77,141,255,.12)}
.card:hover::before{opacity:1}
.card .num{font-family:var(--mono);font-size:12px;color:var(--acc);font-weight:600;margin-bottom:12px;letter-spacing:1px}
.card h3{font-size:20px;font-weight:700;color:var(--fg);margin-bottom:10px;letter-spacing:-.4px}
.card p{font-size:14.5px;color:var(--fg2);line-height:1.8}
.card .ft{display:flex;flex-wrap:wrap;gap:7px;margin-top:16px}
.card .ft span{font-size:11.5px;font-family:var(--mono);color:var(--fg3);
  border:1px solid var(--line);padding:3px 9px;border-radius:6px}
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:14px;margin-top:34px}
.stat{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:18px 20px}
.stat .n{font-size:26px;font-weight:800;letter-spacing:-1px;
  background:linear-gradient(120deg,var(--acc),var(--acc2));-webkit-background-clip:text;
  background-clip:text;-webkit-text-fill-color:transparent;font-family:var(--mono)}
.stat .l{font-size:12.5px;color:var(--fg3);margin-top:3px}

/* ---------- article body ---------- */
article{max-width:none}
article h2{font-size:26px;letter-spacing:-.7px;margin:48px 0 16px;font-weight:750;
  padding-bottom:11px;border-bottom:1px solid var(--line)}
article h3{font-size:19px;margin:32px 0 12px;font-weight:700;letter-spacing:-.3px}
article h4{font-size:16px;margin:22px 0 9px;color:var(--fg);font-weight:650}
article p{margin:14px 0;color:#c7d0e0;font-size:15.5px}
article ul,article ol{margin:14px 0 14px 22px;color:#c7d0e0;font-size:15.5px}
article li{margin:7px 0}
article strong{color:#fff;font-weight:650}
article code:not(pre code){background:rgba(124,92,255,.14);color:#c9b8ff;
  padding:2px 7px;border-radius:5px;font-family:var(--mono);font-size:13.5px;
  border:1px solid rgba(124,92,255,.2)}
blockquote{border-left:3px solid var(--acc);background:rgba(77,141,255,.07);
  padding:14px 20px;margin:20px 0;border-radius:0 9px 9px 0;color:var(--fg2);font-size:14.8px}
blockquote p{margin:5px 0;color:var(--fg2)}
table{width:100%;border-collapse:collapse;margin:22px 0;font-size:14px;
  border:1px solid var(--line);border-radius:10px;overflow:hidden}
th{background:var(--bg2);padding:12px 15px;text-align:left;font-weight:650;
  color:var(--fg);font-size:13px;border-bottom:1px solid var(--line);white-space:nowrap}
td{padding:11px 15px;border-bottom:1px solid rgba(36,44,61,.6);color:#c7d0e0;vertical-align:top}
tr:last-child td{border-bottom:none}
tbody tr:hover{background:rgba(77,141,255,.035)}
.tblwrap{overflow-x:auto;-webkit-overflow-scrolling:touch}

/* ---------- code ---------- */
.cb{margin:22px 0;border:1px solid var(--line);border-radius:11px;overflow:hidden;background:var(--code-bg)}
.cb-h{display:flex;align-items:center;gap:9px;padding:9px 14px;background:#151b26;
  border-bottom:1px solid var(--line)}
.cb-h .d{width:10px;height:10px;border-radius:50%}
.cb-h .d1{background:#ff5f57}.cb-h .d2{background:#febc2e}.cb-h .d3{background:#28c840}
.cb-h .fn{font-family:var(--mono);font-size:12px;color:var(--fg3);margin-left:6px}
.cb-h .tag2{margin-left:auto;font-family:var(--mono);font-size:10.5px;color:var(--fg3);
  border:1px solid var(--line);padding:2px 8px;border-radius:5px;letter-spacing:.5px}
pre{padding:16px 18px;overflow-x:auto;font-family:var(--mono);font-size:13.2px;
  line-height:1.72;color:#c9d1d9;background:var(--code-bg)}
pre::-webkit-scrollbar{height:8px}
pre::-webkit-scrollbar-thumb{background:#2d3546;border-radius:4px}
.k{color:#ff7b9c}.s{color:#a5d6ff}.c{color:#6b7789;font-style:italic}
.n2{color:#ffb454}.t{color:#7ee787}.f{color:#d2a8ff}.p{color:#79c0ff}

/* ---------- svg diagram ---------- */
.dia{margin:26px 0;background:linear-gradient(160deg,var(--card),var(--bg2));
  border:1px solid var(--line);border-radius:var(--radius);padding:22px;overflow-x:auto}
.dia svg{display:block;margin:0 auto;max-width:100%;height:auto}
.dia-cap{text-align:center;font-size:12.5px;color:var(--fg3);margin-top:14px;font-family:var(--mono)}

/* ---------- callout ---------- */
.co{margin:20px 0;border-radius:11px;padding:15px 19px;font-size:14.8px;
  border:1px solid var(--line);background:var(--card);display:flex;gap:13px}
.co .ic{flex:0 0 auto;font-size:17px;line-height:1.5}
.co b{display:block;margin-bottom:4px;font-size:14px;letter-spacing:.2px}
.co p{margin:4px 0 0;font-size:14.3px;color:#c0cadb}
.co.warn{border-color:rgba(255,180,84,.34);background:rgba(255,180,84,.06)}
.co.warn b{color:var(--warn)}
.co.ok{border-color:rgba(61,220,151,.3);background:rgba(61,220,151,.055)}
.co.ok b{color:var(--ok)}
.co.info{border-color:rgba(77,141,255,.3);background:rgba(77,141,255,.055)}
.co.info b{color:var(--acc)}

/* ---------- progress ---------- */
#bar{position:fixed;top:0;left:0;height:2.5px;width:0;z-index:99;
  background:linear-gradient(90deg,var(--acc),var(--acc2),#ff7ab6);transition:width .1s linear}

/* ---------- footer ---------- */
footer{border-top:1px solid var(--line);padding:36px 0;margin-top:56px;
  color:var(--fg3);font-size:13.5px;text-align:center}
footer a{color:var(--fg2)}

/* ---------- back link ---------- */
.back{display:inline-flex;align-items:center;gap:7px;color:var(--fg2);font-size:13.5px;
  padding:7px 13px;border:1px solid var(--line);border-radius:9px;margin-bottom:20px;transition:.18s}
.back:hover{color:var(--fg);border-color:rgba(77,141,255,.45);background:rgba(77,141,255,.07)}

/* ---------- support ---------- */
#support{padding:52px 0 8px}
.spt{display:flex;gap:34px;align-items:center;justify-content:space-between;
  background:linear-gradient(135deg,rgba(77,141,255,.055),rgba(157,107,255,.035));
  border:1px solid var(--line);border-radius:16px;padding:28px 30px}
.spt-l{flex:1;min-width:0}
.spt-l h3{font-size:17.5px;margin-bottom:11px;letter-spacing:-.01em}
.spt-l p{color:var(--fg2);font-size:14.5px;line-height:1.78;margin-bottom:11px}
.spt-l p:last-child{margin-bottom:0}
.spt-note{font-size:13px !important;color:var(--fg3) !important}
.spt-r{flex-shrink:0}
.qr{width:186px;padding:11px;background:#fff;border-radius:14px;
  box-shadow:0 10px 30px rgba(0,0,0,.45),0 0 0 1px rgba(255,255,255,.10);
  text-align:center;position:relative}
.qr::before{content:'';position:absolute;inset:-10px;border-radius:20px;
  background:linear-gradient(135deg,rgba(77,141,255,.32),rgba(157,107,255,.20));
  filter:blur(12px);opacity:.8;z-index:0}
.qr img,.qr-cap{position:relative;z-index:1}
.qr img{width:100%;display:block;border-radius:7px;background:#fff}
.qr-cap{display:block;margin-top:8px;font-size:12px;color:#4a5568;letter-spacing:.03em}

@media(max-width:720px){
  #support{padding:40px 0 4px}
  .spt{flex-direction:column;gap:22px;padding:24px 20px;text-align:center}
  .spt-l h3{font-size:16.5px}
  .spt-l p{font-size:14px}
  .qr{width:168px}
}

@media(max-width:720px){
  .wrap{padding:0 17px}
  header{padding:52px 0 38px}
  .lead{font-size:16px}
  article h2{font-size:21.5px;margin-top:38px}
  article p,article li{font-size:15px}
  pre{font-size:12.2px;padding:14px}
  .card{padding:22px 19px}
  table{font-size:13px}
  th,td{padding:10px 11px}
  .navin a.lk{padding:6px 8px;font-size:13px}
}

/* ---------- breadcrumb ---------- */
.bc{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;
  color:var(--fg3);margin-bottom:22px;font-family:var(--mono)}
.bc a{color:var(--fg2);transition:.18s}
.bc a:hover{color:var(--acc)}
.bc .sep{color:var(--line)}
.bc .cur{color:var(--fg2)}

/* ---------- section (column) head ---------- */
.colhead{padding:56px 0 34px}
.colhead .ico{font-size:30px;line-height:1;margin-bottom:14px;display:block}
.colhead h1{font-size:clamp(28px,4.4vw,40px);letter-spacing:-1px;font-weight:800;margin-bottom:14px}
.colhead .lead{font-size:16.5px}
.colhead .meta{margin-top:20px}
.colcount{font-family:var(--mono);font-size:12.5px;color:var(--fg3);
  border:1px solid var(--line);padding:4px 11px;border-radius:7px}

/* ---------- post list ---------- */
.plist{display:grid;gap:16px}
.pitem{display:flex;gap:20px;align-items:flex-start;background:linear-gradient(160deg,var(--card),var(--bg2));
  border:1px solid var(--line);border-radius:var(--radius);padding:24px 25px;
  transition:.22s cubic-bezier(.4,0,.2,1);position:relative;overflow:hidden}
.pitem:hover{transform:translateY(-3px);border-color:rgba(77,141,255,.45);
  box-shadow:0 16px 44px -16px rgba(0,0,0,.7),0 0 0 1px rgba(77,141,255,.12)}
.pitem .idx{flex:0 0 auto;font-family:var(--mono);font-size:22px;font-weight:800;
  letter-spacing:-1px;background:linear-gradient(120deg,var(--acc),var(--acc2));
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
  min-width:44px;line-height:1.2;padding-top:2px}
.pitem .bd{flex:1;min-width:0}
.pitem h3{font-size:19px;font-weight:700;margin-bottom:9px;letter-spacing:-.4px}
.pitem h3 a{color:var(--fg)}
.pitem h3 a:hover{color:var(--acc)}
.pitem p{font-size:14.3px;color:var(--fg2);line-height:1.78}
.pitem .ft{display:flex;flex-wrap:wrap;gap:7px;margin-top:14px}
.pitem .ft span{font-size:11.5px;font-family:var(--mono);color:var(--fg3);
  border:1px solid var(--line);padding:3px 9px;border-radius:6px}
.pitem.soon{opacity:.62;cursor:default}
.pitem.soon:hover{transform:none;border-color:var(--line);box-shadow:none}

@media(max-width:720px){
  .colhead{padding:40px 0 26px}
  .pitem{flex-direction:column;gap:12px;padding:20px 19px}
  .pitem .idx{font-size:18px;min-width:0}
}

/* ===== article-page additions (from post 1) ===== */
#bar{position:fixed;top:0;left:0;height:2.5px;width:0;z-index:99;
  background:linear-gradient(90deg,var(--acc),var(--acc2),#ff7ab6);transition:width .1s linear}
.ahead{padding:30px 0 24px}
.back{display:inline-flex;align-items:center;gap:7px;color:var(--fg2);font-size:13.5px;
  padding:7px 13px;border:1px solid var(--line);border-radius:9px;margin-bottom:22px;transition:.18s}
.back:hover{color:var(--fg);border-color:rgba(77,141,255,.45);background:rgba(77,141,255,.07);text-decoration:none}
.cb{margin:23px 0;border:1px solid var(--line);border-radius:11px;overflow:hidden;background:var(--code-bg)}
.cb-h .tg{margin-left:auto;font-family:var(--mono);font-size:10.5px;color:var(--fg3);
  border:1px solid var(--line);padding:2px 8px;border-radius:5px;letter-spacing:.5px;white-space:nowrap}
.co{margin:21px 0;border-radius:11px;padding:15px 19px;font-size:14.8px;
  border:1px solid var(--line);background:var(--card);display:flex;gap:13px}
.dia{margin:27px 0;background:linear-gradient(160deg,var(--card),var(--bg2));
  border:1px solid var(--line);border-radius:var(--radius);padding:22px;overflow-x:auto}
.next{display:block;margin-top:46px;padding:24px 26px;background:linear-gradient(160deg,var(--card),var(--bg2));
  border:1px solid var(--line);border-radius:var(--radius);transition:.22s}
.next .lb{font-size:12px;letter-spacing:1.3px;color:var(--fg3);font-family:var(--mono)}
.next h4{font-size:18px;color:var(--fg);margin:8px 0 5px}
.next p{font-size:14.3px;color:var(--fg2);margin:0}
.next:hover{border-color:rgba(77,141,255,.45);transform:translateY(-2px);text-decoration:none}
.tblwrap table{margin:0}
.toc a{color:#c7d0e0}
.toc a:hover{color:var(--acc)}
.toc h4{font-size:12.5px;letter-spacing:1.4px;color:var(--fg3);font-weight:650;margin-bottom:13px}
.toc li{margin:6px 0;color:var(--fg2)}
.toc ol{margin:0 0 0 19px;columns:2;column-gap:34px;font-size:14.3px}
a:hover{text-decoration:underline}
article h2 .hn{color:var(--acc);font-family:var(--mono);font-size:19px;margin-right:9px;opacity:.85}
footer{border-top:1px solid var(--line);padding:34px 0;color:var(--fg3);font-size:13.5px;text-align:center}
hr{border:none;border-top:1px solid var(--line);margin:40px 0}
nav{position:sticky;top:0;z-index:50;backdrop-filter:blur(14px);
  background:rgba(11,14,20,.82);border-bottom:1px solid var(--line)}

/* ===== SVG diagram styles ===== */
.bx{fill:url(#gL);stroke:#2c3648;stroke-width:1.5;rx:11}
.ttl{fill:#e6ebf5;font-family:-apple-system,sans-serif;font-size:14px;font-weight:700}
.sub{fill:#9aa7bd;font-family:"SF Mono",monospace;font-size:10.5px}
.lbl{fill:#6b7789;font-family:"SF Mono",monospace;font-size:10.5px}
.ev{fill:#c9b8ff;font-family:"SF Mono",monospace;font-size:11px}
.hd{fill:#4d8dff;font-family:-apple-system,sans-serif;font-size:11.5px;font-weight:700;letter-spacing:1px}
.lane{fill:#e6ebf5;font-family:-apple-system,sans-serif;font-size:13px;font-weight:700}
.ls{fill:#6b7789;font-family:"SF Mono",monospace;font-size:9.5px}
.ll{fill:#0b0e14;stroke:#4d8dff;stroke-width:1.6}
.lp{fill:#0b0e14;stroke:#ffb454;stroke-width:1.6}
.lg{fill:#0b0e14;stroke:#3ddc97;stroke-width:1.6}
.msg{font-family:"SF Mono",monospace;font-size:10.5px;fill:#c7d0e0}
.num{font-family:"SF Mono",monospace;font-size:10px;fill:#4d8dff;font-weight:700}
.step{fill:#9aa7bd;font-family:-apple-system,sans-serif;font-size:11px}