:root {
  --bg:#EAEDF8;
  --bg-panel:#F8F9FE;
  --bg-panel-2:#DDE2F2;
  --border:#CBD2E8;
  --accent:#0F5C5F;
  --accent-dark:#0A3F42;
  --accent-2:#168A7E;
  --text:#141B2D;
  --text-muted:#556079;
  --success:#1E9E6A;
  --warn:#C9800F;
  --error:#CF4338;
  --hero-top:#F2F4FC;
  --hero-bottom:#E3E7F5;
  --glow-mint:rgba(46,190,160,.12);
  --glow-peach:rgba(255,156,118,.11);
  --glow-peri:rgba(108,124,232,.12);
  --arc:rgba(248,249,254,.82);
  --arc-fade:rgba(248,249,254,0);
  --clear:transparent;
  --accent-soft:rgba(15,92,95,.07);
  --accent-soft-2:rgba(15,92,95,.13);
  --accent-line:rgba(15,92,95,.24);
  --accent-line-soft:rgba(15,92,95,.14);
  --success-soft:rgba(30,158,106,.13);
  --line-soft:rgba(203,210,232,.72);
  --plat-tile:rgba(221,226,242,.72);
  --wash-1:#DCEFEB;
  --wash-2:#EDF0FC;
  --on-accent:#FFFFFF;
  --on-accent-muted:rgba(255,255,255,.72);
  --on-accent-faint:rgba(255,255,255,.14);
  --on-accent-faint-2:rgba(255,255,255,.22);
  --hi-white:rgba(255,255,255,.9);
  --hi-white-soft:rgba(255,255,255,.55);
  --hi-frame:rgba(255,255,255,.16);
  --hi-frame-top:rgba(255,255,255,.3);
  --sheen:rgba(255,255,255,.07);
  --shadow-teal:rgba(15,92,95,.12);
  --shadow-teal-2:rgba(15,92,95,.10);
  --shadow-teal-strong:rgba(15,92,95,.28);
  --shadow-soft:rgba(10,63,66,.06);
  --veil-color:rgba(10,63,66,.35);
  --star-white:#FFFFFF;
  --star-teal:#A6DCD5;
  --star-glow:rgba(15,92,95,.38);
  --dot-red:#FF5F57;
  --dot-yellow:#FEBC2E;
  --dot-green:#28C840;
  --flag-red:#C8414B;
  --flag-white:#FFFFFF;
  --flag-blue:#2F3F78;
  --flag-green:#2E8A5A;
  --flag-edge:rgba(20,27,45,.16);
  --font-display:"Inter","Noto Sans SC","PingFang SC","Hiragino Sans","Apple SD Gothic Neo","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"Inter","Noto Sans SC","PingFang SC","Hiragino Sans","Malgun Gothic","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:"JetBrains Mono",ui-monospace,"SFMono-Regular",Menlo,Consolas,monospace;
  --r-window:20px;
  --r-panel:14px;
  --r-card:24px;
  --r-btn:12px;
  --r-pill:999px;
  --r-small:8px;
  --r-item:10px;
  --r-menu:16px;
  --gutter:40px;
  --content-width:1280px;
  --reading-width:800px;
  --header-height:64px;
  --toc-height:64px;
  --anchor-offset:144px;
  --space-1:8px;
  --space-2:16px;
  --space-3:24px;
  --space-4:32px;
  --space-6:48px;
  --space-8:64px;
  --space-10:80px;
  --text-sm:14px;
  --text-base:16px;
  --text-lg:20px;
  --heading-size:clamp(28px,3vw,40px);
  --display-size:clamp(52px,4.6vw,64px);
  --weight-body:400;
  --weight-medium:600;
  --weight-bold:700;
  --weight-heavy:800;
  --weight-display:900;
  --shadow-card:0 24px 56px -32px var(--shadow-teal-strong),inset 0 1px 0 var(--hi-white);
  --ease-quick:.2s;
}
* {box-sizing:border-box}
html {-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:calc(var(--header-height) + 16px)}
body {margin:0;font-family:var(--font-body);font-weight:var(--weight-body);color:var(--text);background:var(--bg);line-height:1.65;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
h1,h2,h3,h4,p,ul,ol,figure,blockquote {margin:0}
h1,h2,h3 {font-family:var(--font-display);text-wrap:balance;overflow-wrap:break-word}
h1 {font-size:var(--display-size);font-weight:var(--weight-display);line-height:1.12;letter-spacing:-.02em}
h2 {font-size:var(--heading-size);font-weight:var(--weight-heavy);line-height:1.25;letter-spacing:-.02em}
h3 {font-size:var(--text-lg);font-weight:var(--weight-heavy);line-height:1.4}
a {color:inherit;text-decoration:none}
button,input,select,textarea {font:inherit;color:inherit}
button {background:var(--clear);border:0;cursor:pointer}
button:disabled {cursor:not-allowed}
a,button,summary {touch-action:manipulation}
:where(a,button,input,select,textarea,summary,[tabindex]):focus-visible {outline:2px solid var(--accent-2);outline-offset:3px}
img,svg {vertical-align:middle}
img {display:block;max-width:100%;height:auto}
svg {flex-shrink:0}
button svg,a svg {flex-shrink:0}
ul {padding-left:1.3em}
pre {max-width:100%;overflow-x:auto;padding:var(--space-3);border-radius:var(--r-panel);background:var(--bg-panel-2);font-family:var(--font-mono)}
code {font-family:var(--font-mono);overflow-wrap:anywhere}
pre code {overflow-wrap:normal;white-space:pre}
table {border-collapse:collapse}
th,td {text-align:left}
[hidden] {display:none!important}
.wrap {width:100%;max-width:var(--content-width);margin-inline:auto;padding-inline:var(--gutter)}
.reading-wrap {width:100%;max-width:calc(var(--reading-width) + var(--gutter) * 2);margin-inline:auto;padding-inline:var(--gutter)}
.section {padding-top:var(--space-10);padding-bottom:var(--space-10)}
.section-head {max-width:760px;margin-bottom:var(--space-4)}
.section-head p {margin-top:var(--space-2);color:var(--text-muted)}
.grid {display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:var(--space-3)}
.grid > *, .win-body > *, .feature-grid > *, .footer-grid > * {min-width:0}
.stack {display:flex;flex-direction:column;gap:var(--space-3)}
.row {display:flex;flex-wrap:wrap;align-items:center;gap:var(--space-2)}
.muted {color:var(--text-muted)}
.mono {font-family:var(--font-mono);font-variant-numeric:tabular-nums}
.no-break {white-space:nowrap}
.icon {width:20px;height:20px;display:inline-block;flex-shrink:0}
.card {padding:var(--space-4);background:var(--bg-panel);border:1px solid var(--border);border-radius:var(--r-card);box-shadow:var(--shadow-card)}
.surface {background:var(--bg-panel-2);border-radius:var(--r-card);padding:var(--space-4)}
.decorated {position:relative;isolation:isolate;overflow-x:clip}
.prose {overflow-wrap:break-word}
.prose > * + * {margin-top:var(--space-3)}
.prose h2 {margin-top:var(--space-8)}
.prose h3 {margin-top:var(--space-4)}
.prose p,.prose li {line-height:1.85}
.prose a {color:var(--accent);text-decoration:underline;text-underline-offset:3px}
.prose li + li {margin-top:var(--space-1)}
.btn {display:inline-flex;align-items:center;justify-content:center;gap:8px;height:48px;min-width:168px;padding:0 28px;border-radius:var(--r-btn);font-size:16px;font-weight:var(--weight-heavy);letter-spacing:.01em;line-height:1.5;flex-shrink:0;white-space:nowrap;transition:transform var(--ease-quick),box-shadow var(--ease-quick),background-color var(--ease-quick)}
.btn-primary {background:linear-gradient(180deg,var(--accent),var(--accent-dark));color:var(--on-accent);box-shadow:inset 0 1px 0 var(--hi-frame),0 14px 26px -14px var(--shadow-teal-strong)}
.btn-primary:hover {transform:translateY(-1px);box-shadow:inset 0 1px 0 var(--hi-frame),0 18px 30px -14px var(--shadow-teal-strong)}
.btn-ghost {background:var(--bg-panel);color:var(--accent);box-shadow:inset 0 0 0 1.5px var(--accent)}
.btn-ghost:hover {background:var(--accent-soft)}
.btn:active {transform:translateY(1px)}
.btn:disabled,.btn[aria-disabled="true"] {opacity:.55;pointer-events:none}
.btn-small {height:40px;min-width:0;padding-inline:20px;font-size:14px}
.btn-arrow {width:16px;height:16px;display:block}
.cta-row {margin-top:22px;display:flex;justify-content:center;flex-wrap:wrap;gap:12px}
.topbar {position:relative;z-index:50;background:var(--hero-top)}
.topbar-in {width:min(1280px,100% - 80px);margin:0 auto;height:var(--header-height);display:flex;align-items:center;gap:28px;flex-wrap:nowrap}
.brand {display:inline-flex;align-items:center;gap:10px;font-family:var(--font-display);font-weight:var(--weight-display);font-size:20px;letter-spacing:-.02em;color:var(--text);white-space:nowrap;flex-shrink:0}
.brand-mark {width:32px;height:32px;flex:none;display:block}
.nav {display:flex;align-items:center;flex:1;min-width:0}
.nav-list {display:flex;align-items:center;list-style:none;margin:0;padding:0;gap:2px}
.nav-link,.nav-more-btn {display:inline-flex;align-items:center;gap:6px;height:40px;padding:0 14px;border-radius:var(--r-item);font-size:15px;font-weight:var(--weight-medium);white-space:nowrap;transition:background-color var(--ease-quick),color var(--ease-quick)}
.nav-link:hover,.nav-more-btn:hover {background:var(--accent-soft);color:var(--accent)}
.nav-link[aria-current="page"] {color:var(--accent);position:relative}
.nav-link[aria-current="page"]::after {content:"";position:absolute;left:50%;bottom:4px;width:4px;height:4px;margin-left:-2px;border-radius:var(--r-pill);background:var(--accent)}
.chev {width:14px;height:14px;display:block}
.nav-more {position:relative}
.menu {display:none;position:absolute;top:calc(100% + 8px);left:-8px;z-index:60;width:236px;padding:8px;border-radius:var(--r-menu);background:var(--bg-panel);box-shadow:inset 0 0 0 1px var(--border),0 24px 48px -20px var(--shadow-teal-strong)}
.nav-more.is-open .menu {display:block}
.menu-group + .menu-group {margin-top:4px;padding-top:6px;border-top:1px solid var(--line-soft)}
.menu-label {display:block;padding:6px 12px 4px;font-family:var(--font-mono);font-size:11px;letter-spacing:.04em;color:var(--text-muted)}
.menu a {display:flex;align-items:center;min-height:40px;padding:8px 12px;border-radius:var(--r-item);font-size:14px;font-weight:var(--weight-medium)}
.menu a:hover,.menu a[aria-current="page"] {background:var(--accent-soft);color:var(--accent)}
.topbar-end {margin-left:auto;display:flex;align-items:center;gap:10px;flex-shrink:0}
.language {position:relative}
.lang {display:inline-flex;align-items:center;justify-content:center;gap:6px;height:40px;width:auto;min-width:44px;padding:0 12px;border-radius:var(--r-item);font-size:14px;font-weight:var(--weight-medium);color:var(--text-muted);white-space:nowrap}
.lang span {white-space:nowrap}
.lang:hover {background:var(--accent-soft);color:var(--accent)}
.lang-ico {width:16px;height:16px;display:block}
.lang-panel {display:none;position:absolute;right:0;top:calc(100% + 8px);z-index:70;width:180px;padding:8px;background:var(--bg-panel);border:1px solid var(--border);border-radius:var(--r-menu);box-shadow:var(--shadow-card)}
.language.is-open .lang-panel {display:block}
.lang-panel a {display:flex;align-items:center;min-height:44px;padding:8px 12px;border-radius:var(--r-small)}
.lang-panel a:hover,.lang-panel a[aria-current="true"] {color:var(--accent);background:var(--accent-soft)}
.btn-login {display:inline-flex;align-items:center;justify-content:center;height:40px;min-height:40px;padding:0 20px;border-radius:var(--r-btn);background:var(--bg-panel);color:var(--accent);font-size:14px;font-weight:var(--weight-heavy);white-space:nowrap;box-shadow:inset 0 0 0 1.5px var(--accent)}
.btn-login:hover {background:var(--accent-soft)}
.nav-toggle {display:none;align-items:center;justify-content:center;flex-direction:column;gap:4px;min-width:44px;min-height:44px;border-radius:var(--r-small);color:var(--accent)}
.nav-toggle-line {display:block;width:20px;height:2px;background:currentColor}
.nav-drawer {display:none;position:fixed;top:var(--header-height);right:0;left:0;z-index:45;height:calc(100dvh - var(--header-height));max-height:calc(100dvh - var(--header-height));overflow-y:auto;overscroll-behavior:contain;background:var(--bg-panel);padding:var(--space-3) var(--gutter)}
.nav-drawer a {display:flex;align-items:center;width:100%;min-height:44px;padding:12px 16px;border-radius:var(--r-item);font-weight:var(--weight-medium)}
.nav-drawer a:hover,.nav-drawer a[aria-current] {background:var(--accent-soft);color:var(--accent)}
.drawer-label {display:block;margin-top:var(--space-2);padding:12px 16px;color:var(--text-muted);border-top:1px solid var(--border);font-size:14px}
.nav-veil {display:none;position:fixed;inset:var(--header-height) 0 0;z-index:40;background:var(--veil-color)}
html.nav-open {overflow:hidden}
.site-footer {background:var(--bg-panel-2);border-top:1px solid var(--border);padding-top:var(--space-8);padding-bottom:var(--space-4)}
.footer-grid {display:grid;grid-template-columns:1.2fr 1fr 1fr;gap:var(--space-8)}
.footer-brand p {max-width:340px;margin-top:var(--space-2);color:var(--text-muted);font-size:14px}
.footer-heading {font-size:14px;font-weight:var(--weight-heavy);margin-bottom:var(--space-2)}
.footer-links {display:flex;flex-wrap:wrap;gap:4px 16px}
.footer-links a {display:inline-flex;align-items:center;min-height:32px;font-size:14px;color:var(--text-muted)}
.footer-links a:hover {color:var(--accent);text-decoration:underline}
.footer-bottom {display:flex;flex-wrap:wrap;justify-content:space-between;gap:var(--space-2);border-top:1px solid var(--border);margin-top:var(--space-6);padding-top:var(--space-3);font-size:13px;color:var(--text-muted)}
.footer-bottom a {display:inline-flex;align-items:center;min-height:24px}
.reveal {transition:opacity .35s ease,transform .35s ease}
.reveal.pending {opacity:0;transform:translateY(16px)}
.reveal.shown {opacity:1;transform:none}
#server-status {position:static;display:block;min-height:80px;max-width:100%;overflow:hidden;margin-block:var(--space-3)}
#server-status + * {margin-top:var(--space-3)}
#server-status > * {min-width:0;max-width:100%}
@media (max-width:1100px) {
  .topbar-in {gap:16px}
  .nav-link,.nav-more-btn {padding-inline:10px;font-size:14px}
}
@media (max-width:960px) {
  .nav {display:none}
  .topbar-end {margin-left:auto}
  .nav-toggle {display:inline-flex}
  .nav-drawer.is-open,.nav-veil.is-open {display:block}
  .footer-grid {gap:var(--space-4)}
}
@media (max-width:768px) {
  :root {--gutter:24px;--display-size:clamp(28px,5.2vw,40px)}
  .grid {grid-template-columns:repeat(2,minmax(0,1fr))}
  .section {padding-top:var(--space-6);padding-bottom:var(--space-6)}
  .footer-grid {grid-template-columns:1fr 1fr}
  .footer-brand {grid-column:1 / -1}
}
@media (max-width:640px) {
  :root {--gutter:16px}
  .no-break {white-space:normal}
  .tilt,.aux-chip {transform:none}
  .decorated {max-width:100%;overflow-x:clip}
  .topbar-in {width:calc(100% - 32px);gap:8px}
  .brand {font-size:17px;gap:6px}
  .brand-mark {width:28px;height:28px}
  .topbar-end {margin-left:auto;gap:4px}
  .btn-login {padding-inline:12px}
  .lang {padding-inline:6px;font-size:12px}
  .lang-ico,.lang .chev {display:none}
  .grid,.footer-grid {grid-template-columns:minmax(0,1fr)}
  .card,.surface {padding:var(--space-3)}
  .btn {padding-inline:20px;min-width:140px}
  .footer-brand {grid-column:auto}
}
@media (prefers-reduced-motion:reduce) {
  html {scroll-behavior:auto}
  *,*::before,*::after {transition-duration:0s!important}
  .reveal,.reveal.pending {opacity:1;transform:none}
}