:root {
  --bg: #F8F9FB;
  --panel: #FFFFFF;
  --panel-2: #0E1630;
  --border: #E2E6EE;
  --accent: #2B5CFF;
  --accent-dark: #1A3FCC;
  --text: #0D1220;
  --muted: #5A6478;
  --success: #1FA971;
  --warn: #D99A00;
  --error: #E0484D;
  --on-accent: #FFFFFF;
  --clear: transparent;
  --accent-soft: rgba(43,92,255,.07);
  --accent-soft-2: rgba(43,92,255,.12);
  --accent-ring: rgba(43,92,255,.28);
  --success-ring: rgba(31,169,113,.16);
  --band-soft: #E7EDFF;
  --band-mid: #9DB3FF;
  --glow: rgba(70,104,214,.34);
  --glow-2: rgba(43,92,255,.12);
  --chrome-top: #F4F6FA;
  --chrome-bottom: #ECEFF5;
  --chrome-line: #DCE1EA;
  --term-border: rgba(226,230,238,.14);
  --term-text: #C9D2E6;
  --term-muted: #6F7C99;
  --term-readable-muted: #9AA8C3;
  --term-line: rgba(201,210,230,.18);
  --term-accent: #86A2FF;
  --term-success: #5FD3A1;
  --term-cursor: #DCE3F2;
  --chip-info-bg: rgba(134,162,255,.14);
  --chip-info-bd: rgba(134,162,255,.34);
  --chip-direct-bg: rgba(31,169,113,.16);
  --chip-direct-bd: rgba(31,169,113,.42);
  --chip-direct-tx: #6BDCAA;
  --chip-proxy-bg: rgba(43,92,255,.22);
  --chip-proxy-bd: rgba(110,140,255,.5);
  --chip-proxy-tx: #9DB3FF;
  --chip-reject-bg: rgba(224,72,77,.16);
  --chip-reject-bd: rgba(224,72,77,.44);
  --chip-reject-tx: #FF9296;
  --success-ink: #13734C;
  --warn-ink: #795500;
  --error-ink: #AB282E;
  --veil: rgba(14,22,48,.35);
  --shadow-xs: 0 1px 2px rgba(13,18,32,.05);
  --shadow-card: 0 1px 2px rgba(13,18,32,.04),0 10px 28px -12px rgba(13,18,32,.12);
  --shadow-card-hover: 0 2px 4px rgba(13,18,32,.05),0 18px 40px -14px rgba(13,18,32,.18);
  --shadow-float: 0 2px 6px rgba(14,22,48,.10),0 22px 44px -16px rgba(14,22,48,.38),0 56px 110px -36px rgba(14,22,48,.34);
  --shadow-btn: 0 1px 2px rgba(26,63,204,.25),0 8px 18px -8px rgba(43,92,255,.55);
  --shadow-tile: 0 10px 22px -10px rgba(14,22,48,.55);
  --r-xs: 6px;
  --r-sm: 10px;
  --r-md: 12px;
  --r-lg: 16px;
  --r-xl: 20px;
  --r-2xl: 24px;
  --r-pill: 999px;
  --r-circle: 50%;
  --font-display: "Inter","Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-body: "Inter","Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-mono: "JetBrains Mono",ui-monospace,"SFMono-Regular",Menlo,Consolas,monospace;
  --size-body: 16px;
  --size-small: 13px;
  --size-title: clamp(34px,3.3vw,48px);
  --weight-body: 400;
  --weight-medium: 500;
  --weight-strong: 600;
  --gutter: 40px;
  --content-width: 1280px;
  --reading-width: 880px;
  --topbar-h: 68px;
  --peek: 170px;
  --section-space: 80px;
  --ease: cubic-bezier(.2,.65,.3,1);
  --speed: .2s;
  --reveal-speed: .6s;
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 24px; }
html, body { margin: 0; padding: 0; }
html.nav-open { overflow: hidden; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-weight: var(--weight-body);
  font-size: var(--size-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-dark); }
svg { display: block; }
img { display: block; max-width: 100%; height: auto; }
button, input, select, textarea { font: inherit; }
button { cursor: pointer; }
button, a { -webkit-tap-highlight-color: var(--clear); }
button:disabled, .btn[aria-disabled="true"] { cursor: not-allowed; }
[hidden] { display: none !important; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: var(--weight-medium);
  line-height: 1.3;
  letter-spacing: -.012em;
  text-wrap: balance;
}
h1 { font-size: var(--size-title); font-weight: var(--weight-body); color: var(--accent); }
h2 { font-size: clamp(24px,2.3vw,32px); }
h3 { font-size: 21px; }
p { margin-top: 0; }
strong, b { font-weight: var(--weight-strong); }
code, pre { font-family: var(--font-mono); }
code { overflow-wrap: anywhere; }
pre {
  max-width: 100%;
  min-width: 0;
  overflow-x: auto;
  padding: 22px;
  border-radius: var(--r-lg);
  background: var(--panel-2);
  color: var(--term-text);
  font-size: var(--size-small);
  line-height: 1.8;
  tab-size: 2;
}
pre code { overflow-wrap: normal; word-break: normal; white-space: pre; }
hr { border: 0; border-top: 1px solid var(--border); margin-block: 32px; }
.shell, .wrap {
  width: 100%;
  max-width: calc(var(--content-width) + var(--gutter) * 2);
  padding-inline: var(--gutter);
  margin-inline: auto;
}
.reading { max-width: calc(var(--reading-width) + var(--gutter) * 2); }
.section { padding-top: var(--section-space); padding-bottom: var(--section-space); }
.section-head { max-width: 760px; margin-bottom: 32px; }
.section-head h2 { margin: 8px 0 16px; }
.section-head p, .muted { color: var(--muted); }
.eyebrow { font-family: var(--font-mono); font-size: 12px; color: var(--accent); }
.keep-word { white-space: nowrap; }
.grid { display: grid; gap: 24px; }
.grid-three { grid-template-columns: repeat(3,minmax(0,1fr)); }
.grid-two { grid-template-columns: repeat(2,minmax(0,1fr)); }
.grid > *, .hero-grid > *, .entries > *, .footer-grid > * { min-width: 0; }
.icon { width: 20px; height: 20px; flex-shrink: 0; }
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}
.skip-link {
  position: absolute;
  left: var(--gutter);
  top: 8px;
  z-index: 110;
  padding: 10px 16px;
  border-radius: var(--r-sm);
  background: var(--panel);
  color: var(--accent-dark);
  width: 1px;
  height: 1px;
  padding: 0;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}
.skip-link:focus {
  width: auto;
  height: auto;
  padding: 10px 16px;
  overflow: visible;
  clip-path: none;
}
.cta-row { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 28px; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  height: 50px;
  max-width: 100%;
  padding: 0 22px;
  border: 1px solid var(--clear);
  border-radius: var(--r-md);
  font: var(--weight-medium) 15.5px/1 var(--font-body);
  text-align: center;
  text-decoration: none;
  transition: background-color var(--speed) ease,border-color var(--speed) ease,color var(--speed) ease,box-shadow var(--speed) ease;
}
.btn svg { width: 18px; height: 18px; flex-shrink: 0; }
.btn-primary { background: var(--accent); color: var(--on-accent); box-shadow: var(--shadow-btn); }
.btn-primary:hover, .btn-primary.is-hover { background: var(--accent-dark); color: var(--on-accent); }
.btn-primary:active, .btn-primary.is-active { background: var(--accent-dark); color: var(--on-accent); box-shadow: var(--shadow-xs); }
.btn-ghost { background: var(--panel); color: var(--text); border-color: var(--border); box-shadow: var(--shadow-xs); }
.btn-ghost:hover, .btn-ghost.is-hover { background: var(--panel); border-color: var(--accent-ring); color: var(--accent); }
.btn-ghost .arrow { color: var(--muted); }
.btn-ghost:hover .arrow { color: var(--accent); }
.btn:disabled, .btn[aria-disabled="true"] {
  background: var(--border);
  color: var(--muted);
  border-color: var(--border);
  box-shadow: none;
}
.btn.is-focus { outline: 2px solid var(--accent); outline-offset: 3px; }
.btn-small { height: 40px; padding-inline: 16px; font-size: 14px; }
.topbar {
  position: relative;
  z-index: 100;
  height: var(--topbar-h);
  background: var(--bg);
  color: var(--text);
  border-bottom: 1px solid var(--border);
}
.topbar-row {
  position: relative;
  width: 100%;
  max-width: min(100%,calc(1280px + var(--gutter) * 2));
  padding-inline: var(--gutter);
  margin-inline: auto;
  height: 100%;
  display: flex;
  align-items: center;
  gap: 24px;
}
.brand { display: flex; align-items: center; gap: 12px; flex-shrink: 0; color: var(--text); }
.brand:hover { color: var(--text); }
.brand-mark { width: 36px; height: 36px; flex-shrink: 0; border-radius: var(--r-circle); box-shadow: var(--shadow-xs); }
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-name { font-family: var(--font-display); font-weight: var(--weight-strong); font-size: 16px; letter-spacing: -.005em; color: var(--text); }
.brand-domain { font-family: var(--font-mono); font-size: 11px; color: var(--muted); margin-top: 3px; }
.mainnav { margin-left: auto; min-width: 0; }
.mainnav ul { display: flex; align-items: center; gap: 2px; list-style: none; margin: 0; padding: 0; }
.mainnav a {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 8px 12px;
  border-radius: var(--r-sm);
  font-size: 14.5px;
  color: var(--muted);
  white-space: nowrap;
  transition: color var(--speed) ease,background-color var(--speed) ease;
}
.mainnav a svg { width: 16px; height: 16px; flex-shrink: 0; }
.mainnav a:hover { background: var(--accent-soft); color: var(--text); }
.mainnav a[aria-current="page"] { background: var(--accent-soft); color: var(--accent); }
.header-tools { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.language-picker { position: relative; }
.lang {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  height: 38px;
  padding: 0 14px;
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  background: var(--panel);
  color: var(--text);
  font: var(--weight-medium) 14px/1 var(--font-body);
  cursor: pointer;
  box-shadow: var(--shadow-xs);
  white-space: nowrap;
}
.lang svg { width: 16px; height: 16px; color: var(--muted); flex-shrink: 0; }
.lang-caret { color: var(--muted); font-size: 11px; }
.lang-short { display: none; }
.lang-menu {
  position: absolute;
  right: 0;
  top: calc(100% + 10px);
  width: 180px;
  padding: 6px;
  margin: 0;
  list-style: none;
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  background: var(--panel);
  color: var(--text);
  box-shadow: var(--shadow-card-hover);
}
.lang-menu a { display: flex; align-items: center; min-height: 44px; padding: 10px 12px; color: var(--text); border-radius: var(--r-xs); }
.lang-menu a:hover, .lang-menu a[aria-current="true"] { background: var(--accent-soft); color: var(--accent-dark); }
.menu-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  min-height: 44px;
  padding: 8px;
  background: var(--panel);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
}
.menu-toggle svg { width: 22px; height: 22px; }
.nav-veil {
  position: fixed;
  inset: var(--topbar-h) 0 0;
  z-index: 80;
  border: 0;
  background: var(--veil);
  color: var(--text);
}
.mobile-nav {
  position: absolute;
  top: 100%;
  inset-inline: 0;
  z-index: 102;
  padding: 16px var(--gutter) 24px;
  max-height: calc(100dvh - var(--topbar-h));
  overflow-y: auto;
  overscroll-behavior: contain;
  background: var(--panel);
  color: var(--text);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow-card);
}
.mobile-nav ul { list-style: none; margin: 0; padding: 0; }
.mobile-nav a { display: flex; align-items: center; gap: 12px; width: 100%; min-height: 48px; padding: 12px; color: var(--text); border-radius: var(--r-sm); }
.mobile-nav svg { width: 18px; height: 18px; flex-shrink: 0; }
.mobile-nav a:hover, .mobile-nav a[aria-current] { background: var(--accent-soft); color: var(--accent-dark); }
.mobile-languages { margin-top: 16px; padding-top: 16px; border-top: 1px solid var(--border); }
.mobile-languages p { color: var(--muted); font-size: var(--size-small); margin: 0 12px 8px; }
.hero {
  min-height: max(600px,calc(100svh - var(--topbar-h) - var(--peek)));
  display: grid;
  align-content: center;
  padding-top: 48px;
  padding-bottom: 48px;
  overflow-x: clip;
}
.hero-grid { display: grid; grid-template-columns: minmax(0,45fr) minmax(0,55fr); gap: 56px; align-items: center; }
.badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  max-width: 100%;
  margin: 0 0 24px;
  padding: 6px 14px 6px 12px;
  border: 1px solid var(--border);
  border-radius: var(--r-pill);
  background: var(--panel);
  color: var(--muted);
  font-size: 13px;
  line-height: 1.4;
  box-shadow: var(--shadow-xs);
  overflow-wrap: anywhere;
}
.badge-dot { width: 8px; height: 8px; flex-shrink: 0; border-radius: var(--r-circle); background: var(--success); color: var(--text); box-shadow: 0 0 0 4px var(--success-ring); }
.badge b { color: var(--text); }
.hero-title { margin: 0 0 20px; font-size: var(--size-title); font-weight: var(--weight-body); line-height: 1.2; color: var(--accent); }
.hero-title > span { display: block; }
.hero-desc { margin: 0 0 32px; max-width: 33em; font-size: 17px; line-height: 1.72; color: var(--muted); }
.hero-desc strong { color: var(--text); }
.plat-row { display: flex; flex-wrap: wrap; gap: 8px; margin: 0; padding: 0; list-style: none; }
.plat {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  height: 36px;
  padding: 0 12px;
  border: 1px solid var(--border);
  border-radius: var(--r-pill);
  background: var(--panel);
  color: var(--text);
  font-size: 13.5px;
  transition: border-color var(--speed) ease,color var(--speed) ease;
}
.plat svg { width: 15px; height: 15px; flex-shrink: 0; color: var(--muted); }
.plat:hover { border-color: var(--accent-ring); color: var(--accent); }
.plat:hover svg { color: var(--accent); }
.topics { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin-top: 22px; padding-top: 18px; border-top: 1px dashed var(--border); }
.topics-label { font-size: 12.5px; color: var(--muted); margin-right: 4px; }
.topic, .tag { display: inline-flex; align-items: center; justify-content: center; max-width: 100%; padding: 4px 11px; border-radius: var(--r-pill); background: var(--accent-soft); color: var(--accent-dark); font-size: 12.5px; overflow-wrap: anywhere; }
.topic:hover { background: var(--accent-soft-2); color: var(--accent-dark); }
.band { border-top: 1px solid var(--border); padding-top: 32px; padding-bottom: 88px; background: linear-gradient(180deg,var(--bg) 0%,var(--band-soft) 36%,var(--band-mid) 72%,var(--accent) 100%); color: var(--text); }
.entries { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 24px; }
.card, .panel, .entry {
  padding: 30px;
  background: var(--panel);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--r-2xl);
  box-shadow: var(--shadow-card);
  min-width: 0;
}
.panel-dark { background: var(--panel-2); color: var(--term-text); border-color: var(--term-border); }
.panel-dark h2, .panel-dark h3 { color: var(--on-accent); }
.panel-dark a { color: var(--term-accent); }
.entry { position: relative; display: flex; flex-direction: column; min-height: 280px; padding: 30px 30px 28px; transition: transform .25s ease,box-shadow .25s ease; }
.entry:hover { color: var(--text); transform: translateY(-3px); box-shadow: var(--shadow-card-hover); }
.entry-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 20px; margin-bottom: 12px; }
.entry-kicker { display: block; font-family: var(--font-mono); font-size: 12px; color: var(--accent); margin-bottom: 6px; }
.entry h2 { margin: 0; font-weight: var(--weight-medium); font-size: 21px; line-height: 1.3; }
.entry-tile { width: 56px; height: 56px; flex-shrink: 0; border-radius: var(--r-lg); background: linear-gradient(160deg,var(--panel-2),var(--text)); color: var(--term-accent); display: grid; place-items: center; box-shadow: var(--shadow-tile); }
.entry-tile svg { width: 26px; height: 26px; }
.entry p { margin: 0 0 20px; font-size: 15px; line-height: 1.7; color: var(--muted); max-width: 28em; }
.entry-link { margin-top: auto; display: inline-flex; align-items: center; gap: 6px; font-size: 15px; font-weight: var(--weight-medium); color: var(--accent); }
.prose { min-width: 0; line-height: 1.85; }
.prose h2 { margin-top: 56px; margin-bottom: 20px; }
.prose h3 { margin-top: 32px; margin-bottom: 16px; }
.prose p, .prose ul, .prose ol { margin-bottom: 22px; }
.prose a { text-decoration: underline; text-underline-offset: 3px; }
.prose :not(pre) > code { padding: 2px 5px; border-radius: var(--r-xs); background: var(--accent-soft); color: var(--accent-dark); font-size: .9em; }
.prose li { padding-left: 4px; margin-bottom: 8px; }
.prose :target { scroll-margin-top: 24px; }
.decorated { position: relative; overflow-x: clip; }
.reveal { opacity: 1; }
html.reveal-ready .reveal:not(.shown) { opacity: 0; transform: translateY(14px); }
html.reveal-ready .reveal { transition: opacity var(--reveal-speed) var(--ease),transform var(--reveal-speed) var(--ease); }
.site-footer { padding-top: 64px; padding-bottom: 28px; background: var(--panel); color: var(--text); border-top: 1px solid var(--border); }
.footer-grid { display: grid; grid-template-columns: 1.25fr .8fr 1.3fr .65fr; gap: 40px; }
.footer-brand p { margin: 20px 0 0; font-size: 14px; line-height: 1.8; color: var(--muted); }
.footer-column h2 { font-size: 14px; margin: 0 0 16px; font-weight: var(--weight-strong); }
.footer-column ul { margin: 0; padding: 0; list-style: none; }
.footer-column li { margin-bottom: 8px; }
.footer-column a { display: inline-block; padding-block: 3px; color: var(--muted); font-size: 13px; }
.footer-column a:hover { color: var(--accent); }
.footer-column a[aria-current="true"] { color: var(--accent-dark); }
.footer-bottom { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 16px; margin-top: 40px; padding-top: 24px; border-top: 1px solid var(--border); color: var(--muted); font-size: 12px; }
.footer-bottom p { margin: 0; }
.footer-bottom a { color: var(--muted); }
@media (max-width: 1180px) {
  .topbar-row { gap: 16px; }
  .mainnav a { padding: 8px 9px; gap: 6px; }
}
@media (max-width: 1080px) {
  .mainnav { display: none; }
  .header-tools { margin-left: auto; }
  .menu-toggle { display: inline-flex; }
  .hero { min-height: 0; padding-top: 48px; padding-bottom: 56px; }
  .hero-grid { grid-template-columns: minmax(0,1fr); gap: 48px; }
  .entries { grid-template-columns: minmax(0,1fr); }
  .entry { min-height: 0; }
  .footer-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .topbar[data-long-nav="true"] .mainnav { display: none; }
}
@media (min-width: 1081px) and (max-width: 1280px) {
  .topbar[data-long-nav="true"] .mainnav { display: none; }
  .topbar[data-long-nav="true"] .header-tools { margin-left: auto; }
  .topbar[data-long-nav="true"] .menu-toggle { display: inline-flex; }
}
@media (max-width: 768px) {
  :root { --size-title: clamp(24px,4.6vw,30px); --section-space: 56px; }
  .grid-three, .grid-two { grid-template-columns: minmax(0,1fr); }
}
@media (max-width: 640px) {
  :root { --gutter: 20px; }
  .brand-domain { display: none; }
  .topbar-row { gap: 8px; }
  .brand { gap: 8px; }
  .brand-name { font-size: 14px; }
  .brand-mark { width: 32px; height: 32px; }
  .header-tools { gap: 6px; margin-left: auto; }
  .lang { height: 44px; padding-inline: 10px; }
  .lang-full { display: none; }
  .lang-short { display: inline; }
  .hero-desc { font-size: 16px; }
  .badge { align-items: center; flex-wrap: nowrap; }
  .card, .panel, .entry { padding: 24px; }
  .footer-grid { grid-template-columns: minmax(0,1fr); gap: 28px; }
  .tilt, [data-tilt] { transform: none !important; }
}
@media (max-width: 360px) {
  :root { --gutter: 16px; }
  .brand-name { font-size: 13px; }
  .brand-mark { width: 30px; height: 30px; }
  .lang svg { display: none; }
  .btn { padding-inline: 17px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
  html.reveal-ready .reveal:not(.shown) { opacity: 1; transform: none; }
  .entry:hover { transform: none; }
}