:root{
  color-scheme:light;
  --page:#f7f8fa;
  --surface:#ffffff;
  --surface-sunken:#f2f4f7;
  --ink:#0b1220;
  --ink-secondary:#4a5766;
  --muted:#68758a;
  --line:#e2e7ef;
  --line-strong:#cfd6e2;
  --brand:#0f766e;
  --brand-strong:#0b5d56;
  --brand-wash:#e6f4f1;
  --accent:#1d4ed8;
  --good:#0ca30c;
  --good-ink:#046104;
  --series-http:#2a78d6;
  --series-https:#eb6834;
  --series-socks4:#1baf7a;
  --series-socks5:#eda100;
  --radius:12px;
  --radius-sm:8px;
  --shadow:0 1px 2px rgba(11,18,32,.04),0 4px 12px rgba(11,18,32,.04);
  --shadow-lift:0 2px 4px rgba(11,18,32,.06),0 12px 28px rgba(11,18,32,.08);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:system-ui,-apple-system,"Segoe UI","PingFang SC","Hiragino Sans GB",
    "Hiragino Kaku Gothic ProN","Yu Gothic","Malgun Gothic","Microsoft YaHei",
    "Noto Sans CJK SC","Noto Sans",sans-serif;
  background:var(--page);
  color:var(--ink);
  line-height:1.62;
  -webkit-font-smoothing:antialiased;
}
.wrap{width:min(1120px,calc(100% - 40px));margin:0 auto}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3{line-height:1.2;letter-spacing:-.02em}

/* ---------- header ---------- */
header{
  position:sticky;top:0;z-index:20;
  background:rgba(255,255,255,.88);
  backdrop-filter:saturate(180%) blur(12px);
  border-bottom:1px solid var(--line);
}
.topbar{min-height:60px;display:flex;align-items:center;justify-content:space-between;gap:16px}
.brand{display:inline-flex;align-items:center;gap:9px;color:var(--ink);font-weight:800;letter-spacing:-.02em}
.brand:hover{text-decoration:none}
.brand svg{flex:none}
.nav{display:flex;align-items:center;gap:20px;font-size:14px;font-weight:600}
.nav a{color:var(--ink-secondary)}
.nav a:hover{color:var(--ink);text-decoration:none}
.lang{position:relative}
.lang summary{
  list-style:none;cursor:pointer;display:inline-flex;align-items:center;gap:6px;
  padding:6px 11px;border:1px solid var(--line);border-radius:999px;
  background:var(--surface);font-size:13px;font-weight:600;color:var(--ink-secondary);
}
.lang summary::-webkit-details-marker{display:none}
.lang summary:hover{border-color:var(--line-strong)}
.lang-menu{
  position:absolute;right:0;top:calc(100% + 8px);min-width:172px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-sm);
  box-shadow:var(--shadow-lift);padding:6px;display:grid;gap:2px;font-size:14px;
}
.lang-menu a{padding:7px 10px;border-radius:6px;color:var(--ink-secondary);font-weight:500}
.lang-menu a:hover{background:var(--surface-sunken);text-decoration:none}
.lang-menu a[aria-current=page]{color:var(--ink);font-weight:700;background:var(--brand-wash)}

/* ---------- hero ---------- */
.hero{padding:56px 0 40px;border-bottom:1px solid var(--line);background:
  radial-gradient(1200px 380px at 15% -10%,var(--brand-wash),transparent 60%),
  linear-gradient(180deg,#fff,var(--page))}
.eyebrow{
  display:inline-flex;align-items:center;gap:7px;margin:0 0 16px;
  padding:5px 12px;border:1px solid var(--line);border-radius:999px;
  background:var(--surface);font-size:13px;font-weight:600;color:var(--ink-secondary);
}
.pulse{width:7px;height:7px;border-radius:50%;background:var(--good);box-shadow:0 0 0 0 rgba(12,163,12,.5);animation:pulse 2.4s infinite}
.eyebrow b{color:var(--ink);font-weight:750}
/* Freshness is the product's core claim, so the cadence gets its own chip
   rather than being buried in a sentence. */
.eyebrow .cadence{
  margin-left:10px;padding:3px 9px;border-radius:999px;
  background:var(--brand);color:#fff;font-size:12px;font-weight:750;
  letter-spacing:.01em;white-space:nowrap;
}
@keyframes pulse{70%{box-shadow:0 0 0 7px rgba(12,163,12,0)}100%{box-shadow:0 0 0 0 rgba(12,163,12,0)}}
@media (prefers-reduced-motion:reduce){.pulse{animation:none}}
.hero-grid{display:grid;grid-template-columns:minmax(0,1fr) 460px;gap:32px;align-items:center}
.hero-art{width:100%;height:auto;max-width:460px;justify-self:end}
.hero-art .node{animation:float 5.5s ease-in-out infinite}
@keyframes float{0%,100%{opacity:.55}50%{opacity:1}}
@media (prefers-reduced-motion:reduce){.hero-art .node{animation:none;opacity:.85}}
.hero h1{max-width:15ch;margin:0;font-size:clamp(38px,5.6vw,62px);letter-spacing:-.035em}
.hero .lead{max-width:60ch;margin:18px 0 0;font-size:19px;color:var(--muted)}
.actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:26px}
.button{
  display:inline-flex;align-items:center;gap:8px;min-height:44px;padding:0 18px;
  border:1px solid var(--line-strong);border-radius:9px;background:var(--surface);
  color:var(--ink);font-weight:650;font-size:15px;
  transition:transform .15s ease,box-shadow .15s ease,border-color .15s ease;
}
.button:hover{text-decoration:none;transform:translateY(-1px);box-shadow:var(--shadow);border-color:var(--muted)}
.button.primary{background:var(--brand);border-color:var(--brand);color:#fff}
.button.primary:hover{background:var(--brand-strong);border-color:var(--brand-strong)}

/* ---------- stat tiles ---------- */
.kpis{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;margin-top:34px}
.kpi{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:16px 18px 14px;box-shadow:var(--shadow);
  transition:transform .15s ease,box-shadow .15s ease;
}
.kpi:hover{transform:translateY(-2px);box-shadow:var(--shadow-lift)}
.kpi .label{display:block;font-size:13px;font-weight:600;color:var(--muted)}
.kpi .value{display:block;margin-top:2px;font-size:31px;font-weight:700;letter-spacing:-.03em}
.kpi .delta{font-size:13px;font-weight:600;color:var(--good-ink)}
.kpi .spark{display:block;margin-top:8px}

/* ---------- layout ---------- */
main{padding:44px 0 64px}
.section{margin-top:52px;scroll-margin-top:76px}
.section:first-child{margin-top:0}
.section > h2{margin:0 0 6px;font-size:clamp(23px,2.6vw,30px)}
.section > p.sub{margin:0 0 20px;color:var(--muted);max-width:66ch}
.panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow)}
.grid{display:grid;gap:14px}
.grid.two{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid.three{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid.four{grid-template-columns:repeat(4,minmax(0,1fr))}

/* ---------- cards ---------- */
.card{
  display:block;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius);padding:18px;color:inherit;box-shadow:var(--shadow);
  transition:transform .15s ease,box-shadow .15s ease,border-color .15s ease;
}
a.card:hover{text-decoration:none;transform:translateY(-2px);box-shadow:var(--shadow-lift);border-color:var(--line-strong)}
.card h3{margin:0 0 4px;font-size:16px;display:flex;align-items:center;gap:8px}
.card .ico{
  display:inline-flex;align-items:center;justify-content:center;
  width:38px;height:38px;margin-bottom:12px;border-radius:10px;
  background:var(--brand-wash);color:var(--brand);
  transition:background .15s ease,color .15s ease,transform .15s ease;
}
a.card:hover .ico{background:var(--brand);color:#fff;transform:scale(1.06)}
.map{display:block;margin:0 auto}
.figure{
  margin:0 auto 8px;max-width:760px;border:1px solid var(--line);
  border-radius:var(--radius);overflow:hidden;background:var(--surface);
  box-shadow:var(--shadow);
}
.figure img{display:block;width:100%;height:auto}
.bars{display:block}
.card p{margin:0;font-size:14px;color:var(--muted)}
.card .count{font-size:13px;font-weight:700;color:var(--ink-secondary);font-variant-numeric:tabular-nums}
.dot{width:9px;height:9px;border-radius:50%;flex:none}

/* ---------- code ---------- */
.code{position:relative;background:#0d1424;border-radius:var(--radius)}
.code pre{margin:0;padding:16px 18px;padding-right:86px;overflow-x:auto;color:#e6edf7;font-size:13.5px;line-height:1.7;border-radius:var(--radius)}
.code pre code{white-space:pre}
.code code{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}
.code .tok-cmd{color:#7ee0c0}
.code .tok-flag{color:#9db4d8}
.code .tok-url{color:#cbd7ea}
.copy{
  position:absolute;top:10px;right:10px;min-height:30px;padding:0 10px;
  border:1px solid rgba(255,255,255,.18);border-radius:7px;
  background:rgba(255,255,255,.08);color:#e6edf7;font:600 12px/1 system-ui,sans-serif;
  cursor:pointer;transition:background .15s ease;
}
.copy:hover{background:rgba(255,255,255,.16)}
.copy[data-copied]{background:var(--good);border-color:var(--good);color:#fff}

/* ---------- table ---------- */
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius);background:var(--surface);box-shadow:var(--shadow)}
table{border-collapse:collapse;width:100%;font-size:14px}
th,td{padding:11px 14px;text-align:left;border-bottom:1px solid var(--line)}
thead th{background:var(--surface-sunken);font-size:12px;letter-spacing:.04em;text-transform:uppercase;color:var(--muted)}
tbody tr:last-child td{border-bottom:0}
tbody tr:hover{background:var(--surface-sunken)}
td.num{font-variant-numeric:tabular-nums;font-weight:650}

/* ---------- chart ---------- */
.chart{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow)}
.chart h3{margin:0 0 2px;font-size:16px}
.chart .cap{margin:0 0 16px;font-size:13px;color:var(--muted)}
.legend{display:flex;flex-wrap:wrap;gap:14px;margin-top:14px;font-size:13px;color:var(--ink-secondary)}
.legend span{display:inline-flex;align-items:center;gap:7px}
.legend b{font-variant-numeric:tabular-nums}

/* ---------- pills / faq / footer ---------- */
.pills{display:flex;flex-wrap:wrap;gap:8px}
.pills a{
  padding:7px 13px;border:1px solid var(--line);border-radius:999px;
  background:var(--surface);color:var(--ink-secondary);font-size:14px;font-weight:550;
  transition:border-color .15s ease,color .15s ease,background .15s ease;
}
.pills a:hover{text-decoration:none;border-color:var(--brand);color:var(--brand);background:var(--brand-wash)}
.cc{
  display:inline-block;margin-right:7px;padding:1px 5px;border-radius:4px;
  background:var(--surface-sunken);color:var(--muted);
  font-size:11px;font-weight:800;letter-spacing:.06em;vertical-align:1px;
}
.pills a:hover .cc{background:#fff;color:var(--brand)}
.faq details{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:0;margin-bottom:10px;box-shadow:var(--shadow)}
.faq summary{cursor:pointer;padding:16px 18px;font-weight:650;list-style:none;display:flex;justify-content:space-between;gap:12px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--muted);font-weight:400;font-size:20px;line-height:1}
.faq details[open] summary::after{content:"\2212"}
.faq p{margin:0;padding:0 18px 16px;color:var(--muted);font-size:15px}
.note{border:1px solid var(--line);border-left:3px solid var(--brand);background:var(--surface);border-radius:var(--radius);padding:16px 18px;color:var(--ink-secondary);font-size:15px}
footer{border-top:1px solid var(--line);background:var(--surface);padding:30px 0;color:var(--muted);font-size:14px}
.foot{display:flex;flex-wrap:wrap;gap:14px;justify-content:space-between;align-items:center}

@media(max-width:1040px){
  /* The hero figure is decorative; drop it before it can squeeze the copy. */
  .hero-grid{grid-template-columns:minmax(0,1fr)}
  .hero-art{display:none}
}
@media(max-width:900px){
  .kpis,.grid.four{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid.three{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media(max-width:760px){
  .topbar{flex-direction:column;align-items:flex-start;gap:10px;padding:12px 0}
  .nav{flex-wrap:wrap;gap:14px;font-size:13.5px}
}
@media(max-width:640px){
  .kpis,.grid.two,.grid.three,.grid.four{grid-template-columns:1fr}
  .hero{padding:34px 0 28px}
  .hero h1{font-size:clamp(30px,8vw,40px)}
  .button{width:100%;justify-content:center}
  .map{height:auto}
  .section{margin-top:38px}
}
.brand{white-space:nowrap}
.wrap{max-width:100%}
.chart{position:relative}
[hidden]{display:none!important}
.tooltip{
  position:absolute;top:8px;transform:translateX(-50%);pointer-events:none;
  background:#0b1220;color:#fff;border-radius:7px;padding:6px 10px;font-size:12.5px;
  display:flex;gap:8px;align-items:baseline;white-space:nowrap;box-shadow:0 6px 18px rgba(11,18,32,.22);
}
.tooltip span{color:#aebbd0}
.tooltip b{font-variant-numeric:tabular-nums}