:root{
  --color-bg:#F7FAF9;
  --color-panel:#FFFFFF;
  --color-panel-soft:#EEF5F1;
  --color-border:#E3EAE6;
  --color-accent:#109E63;
  --color-accent-deep:#0B7448;
  --color-text:#17211C;
  --color-muted:#5C6B63;
  --color-success:#128A5A;
  --color-warning:#D97706;
  --color-error:#DC2626;
  --color-wash-mint:#E9F4EE;
  --color-wash-blue:#EAF2F6;
  --color-overlay:rgba(23,33,28,.38);
  --color-shadow-soft:rgba(23,33,28,.05);
  --color-shadow-mid:rgba(23,33,28,.08);
  --color-shadow-far:rgba(23,33,28,.10);
  --color-shadow-near:rgba(23,33,28,.14);
  --color-shadow-accent:rgba(16,158,99,.10);
  --color-accent-ring:rgba(16,158,99,.18);
  --color-success-ring:rgba(18,138,90,.15);
  --font-display:'Inter','Noto Sans SC','PingFang SC','Microsoft YaHei',sans-serif;
  --font-body:'Inter','Noto Sans SC','PingFang SC','Hiragino Sans GB','Microsoft YaHei',sans-serif;
  --font-mono:'JetBrains Mono','SFMono-Regular',Consolas,'Liberation Mono',monospace;
  --radius-xs:6px;
  --radius-sm:10px;
  --radius-md:16px;
  --radius-lg:24px;
  --radius-xl:28px;
  --radius-pill:999px;
  --shadow-soft:0 4px 12px var(--color-shadow-soft);
  --shadow-mid:0 12px 32px var(--color-shadow-mid);
  --shadow-far:0 32px 72px var(--color-shadow-far);
  --shadow-near:0 10px 26px var(--color-shadow-near);
  --shadow-layered:var(--shadow-far),0 20px 56px var(--color-shadow-accent),var(--shadow-mid);
  --gutter:clamp(16px,4vw,44px);
  --content-width:1120px;
  --wide-width:1280px;
  --header-height:72px;
  --ease:cubic-bezier(.22,.85,.32,1);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
html.nav-open{overflow:hidden}
body,h1,h2,h3,h4,p,ul,ol,dl,dd,figure,blockquote{margin:0}
body{
  min-width:320px;
  overflow-x:hidden;
  color:var(--color-text);
  background:var(--color-bg);
  font-family:var(--font-body);
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
}
img,svg,video{display:block;max-width:100%}
button,input,select,textarea{font:inherit}
button,a{-webkit-tap-highlight-color:transparent}
button{border:0}
a{color:var(--color-accent-deep);text-underline-offset:.18em}
a:hover{color:var(--color-accent)}
ul,ol{padding-left:1.25em}
table{border-collapse:collapse}
code,kbd,pre{font-family:var(--font-mono)}
code{overflow-wrap:anywhere}
pre{
  max-width:100%;
  overflow-x:auto;
  padding:20px;
  border:1px solid var(--color-border);
  border-radius:var(--radius-md);
  background:var(--color-text);
  color:var(--color-panel);
  line-height:1.65;
  -webkit-overflow-scrolling:touch;
}
::selection{background:var(--color-accent-ring);color:var(--color-text)}
:focus-visible{outline:3px solid var(--color-accent-ring);outline-offset:3px}
.wrap{
  width:100%;
  max-width:calc(var(--content-width) + var(--gutter) * 2);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.wide-wrap{
  width:100%;
  max-width:min(100%,calc(var(--wide-width) + var(--gutter) * 2));
  margin-inline:auto;
  padding-inline:var(--gutter);
}
main,section,article,aside,header,footer,nav,.wrap,.wide-wrap,.grid>*{min-width:0}
.section{padding-top:clamp(64px,9vw,112px);padding-bottom:clamp(64px,9vw,112px)}
.section-soft{background:var(--color-panel-soft);color:var(--color-text)}
.section-head{max-width:760px;margin-bottom:36px}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  margin-bottom:16px;
  color:var(--color-accent-deep);
  font-size:.8rem;
  font-weight:700;
  letter-spacing:.04em;
}
.eyebrow::before{
  width:7px;
  height:7px;
  flex-shrink:0;
  border-radius:50%;
  background:var(--color-success);
  box-shadow:0 0 0 3px var(--color-success-ring);
  content:"";
}
h1,h2,h3,h4{
  color:var(--color-text);
  font-family:var(--font-display);
  line-height:1.2;
  text-wrap:balance;
}
h1{font-size:clamp(34px,3.3vw,48px);font-weight:800;letter-spacing:-.015em}
h2{font-size:clamp(28px,3.2vw,40px);font-weight:800;letter-spacing:-.012em}
h3{font-size:clamp(20px,2vw,26px);font-weight:750}
h4{font-size:1.05rem;font-weight:750}
.title-accent{color:var(--color-accent)}
.title-accent-deep{color:var(--color-accent-deep)}
.no-break{white-space:nowrap}
.lead{font-size:clamp(17px,2vw,20px);color:var(--color-muted);line-height:1.75}
.muted{color:var(--color-muted)}
.mono{font-family:var(--font-mono)}
.prose{max-width:780px}
.prose>*+*{margin-top:1.15em}
.prose h2{margin-top:2.2em}
.prose h3{margin-top:1.8em}
.prose li+li{margin-top:.45em}
.prose img{border-radius:var(--radius-md)}
.prose>table,.data-table{width:100%;font-size:.94rem}
.prose>.data-table{
  display:block;
  max-width:100%;
  min-width:0;
  overflow-x:auto;
  -webkit-overflow-scrolling:touch;
}
th,td{padding:14px 16px;border:1px solid var(--color-border);text-align:left;vertical-align:top}
th{background:var(--color-panel-soft);color:var(--color-text);font-weight:700}
td{background:var(--color-panel);color:var(--color-text)}
.button{
  display:inline-flex;
  min-height:48px;
  align-items:center;
  justify-content:center;
  gap:9px;
  padding:11px 22px;
  border:1px solid transparent;
  border-radius:var(--radius-md);
  color:var(--color-panel);
  background:linear-gradient(180deg,var(--color-accent),var(--color-accent-deep));
  box-shadow:0 10px 24px var(--color-accent-ring),0 2px 6px var(--color-shadow-near);
  font-weight:700;
  line-height:1.2;
  text-decoration:none;
  cursor:pointer;
  transition:transform .15s ease,box-shadow .15s ease,background-color .15s ease;
}
.button:hover{transform:translateY(-2px);color:var(--color-panel);box-shadow:0 14px 30px var(--color-accent-ring),var(--shadow-soft)}
.button:active{transform:translateY(0)}
.button:disabled,.button.is-disabled{opacity:.55;pointer-events:none}
.button-secondary{
  border-color:var(--color-border);
  color:var(--color-text);
  background:var(--color-panel);
  box-shadow:var(--shadow-mid);
}
.button-secondary:hover{color:var(--color-text);background:var(--color-panel-soft)}
.button-small{min-height:40px;padding:8px 16px;border-radius:var(--radius-sm);font-size:.9rem}
.button svg,.nav-link svg,.mobile-link svg{width:17px;height:17px;flex-shrink:0}
.card,.panel{
  border:1px solid var(--color-border);
  border-radius:var(--radius-lg);
  background:var(--color-panel);
  color:var(--color-text);
  box-shadow:var(--shadow-mid);
}
.card{padding:clamp(20px,3vw,30px)}
.panel{padding:clamp(24px,4vw,40px);box-shadow:var(--shadow-layered)}
.chip-row{display:flex;flex-wrap:wrap;gap:9px}
.chip{
  display:inline-flex;
  max-width:100%;
  align-items:center;
  gap:7px;
  padding:6px 12px;
  overflow:hidden;
  border:1px solid var(--color-border);
  border-radius:var(--radius-pill);
  background:var(--color-panel);
  color:var(--color-muted);
  font-size:.8rem;
  font-weight:600;
}
.chip::before{width:5px;height:5px;flex-shrink:0;border-radius:50%;background:var(--color-accent);content:""}
.site-header{
  position:relative;
  z-index:50;
  height:var(--header-height);
  background:var(--color-panel);
  color:var(--color-text);
}
.header-shell{
  display:flex;
  width:100%;
  height:var(--header-height);
  max-width:min(100%,calc(var(--wide-width) + var(--gutter) * 2));
  align-items:center;
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.site-brand{display:flex;flex-shrink:0;align-items:center;gap:10px;color:var(--color-text);font-weight:800;text-decoration:none}
.site-brand:hover{color:var(--color-text)}
.site-brand img{width:34px;height:34px;flex-shrink:0}
.desktop-nav{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav-link{
  display:flex;
  min-height:42px;
  align-items:center;
  gap:7px;
  padding:8px 12px;
  border-radius:var(--radius-pill);
  color:var(--color-muted);
  font-size:.875rem;
  font-weight:600;
  text-decoration:none;
}
.nav-link:hover,.nav-link.is-active{background:var(--color-panel-soft);color:var(--color-accent-deep)}
.header-tools{display:flex;align-items:center;gap:8px;margin-left:12px}
.lang-menu{position:relative}
.lang-trigger,.menu-toggle{
  display:inline-flex;
  min-width:44px;
  min-height:44px;
  align-items:center;
  justify-content:center;
  gap:7px;
  border:1px solid var(--color-border);
  border-radius:var(--radius-pill);
  background:var(--color-panel);
  color:var(--color-text);
  box-shadow:var(--shadow-soft);
  cursor:pointer;
}
.lang-trigger{padding-inline:14px}
.lang-trigger svg,.menu-toggle svg{width:16px;height:16px;flex-shrink:0}
.lang-short{display:none}
.lang-options{
  position:absolute;
  top:calc(100% + 8px);
  right:0;
  width:180px;
  padding:8px;
  border:1px solid var(--color-border);
  border-radius:var(--radius-md);
  background:var(--color-panel);
  color:var(--color-text);
  box-shadow:var(--shadow-near);
}
.lang-options[hidden]{display:none}
.lang-options a{
  display:flex;
  min-height:44px;
  align-items:center;
  padding:9px 12px;
  border-radius:var(--radius-sm);
  color:var(--color-text);
  text-decoration:none;
}
.lang-options a:hover,.lang-options a[aria-current]{background:var(--color-panel-soft);color:var(--color-accent-deep)}
.menu-toggle{display:none;padding:10px}
.mobile-drawer,.nav-veil{display:none}
.site-footer{
  padding-top:64px;
  background:var(--color-text);
  color:var(--color-panel-soft);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.3fr .8fr 1.2fr .8fr;
  gap:36px;
}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px;color:var(--color-panel);font-weight:800;text-decoration:none}
.footer-brand img{width:36px;height:36px;flex-shrink:0}
.footer-copy{max-width:30em;color:var(--color-border);font-size:.9rem}
.footer-title{margin-bottom:13px;color:var(--color-panel);font-size:.9rem;font-weight:750}
.footer-links{display:grid;gap:8px;padding:0;list-style:none}
.footer-links a{color:var(--color-border);font-size:.88rem;text-decoration:none}
.footer-links a:hover{color:var(--color-panel)}
.footer-bottom{
  display:flex;
  justify-content:space-between;
  gap:20px;
  margin-top:48px;
  padding-top:22px;
  padding-bottom:26px;
  border-top:1px solid var(--color-muted);
  color:var(--color-border);
  font-size:.82rem;
}
.reveal{opacity:0;transform:translateY(18px);transition:opacity .55s var(--ease),transform .55s var(--ease)}
.reveal.shown{opacity:1;transform:none}
.tilt{transform:rotate(1.5deg)}
.decorated-section{position:relative;overflow-x:clip}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{scroll-behavior:auto!important;animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}
  .reveal{opacity:1;transform:none}
}
@media (max-width:1080px){
  .desktop-nav .nav-link span{display:none}
}
@media (max-width:820px){
  h1{font-size:clamp(24px,7vw,30px);line-height:1.16}
  h2{font-size:clamp(24px,6vw,32px)}
  .desktop-nav,.lang-options{display:none!important}
  .header-tools{margin-left:auto}
  .lang-trigger{padding-inline:12px}
  .lang-full{display:none}
  .lang-short{display:inline}
  .menu-toggle{display:inline-flex}
  .nav-veil{
    position:fixed;
    z-index:48;
    inset:var(--header-height) 0 0;
    background:var(--color-overlay);
  }
  .nav-veil.is-open{display:block}
  .mobile-drawer{
    position:fixed;
    z-index:51;
    top:var(--header-height);
    right:0;
    left:0;
    display:none;
    max-height:calc(100dvh - var(--header-height));
    padding:12px var(--gutter) 22px;
    overflow-y:auto;
    border-top:1px solid var(--color-border);
    background:var(--color-panel);
    color:var(--color-text);
    box-shadow:var(--shadow-near);
    overscroll-behavior:contain;
  }
  .mobile-drawer.is-open{display:block}
  .mobile-link{
    display:flex;
    width:100%;
    min-height:48px;
    align-items:center;
    gap:10px;
    padding:11px 12px;
    border-radius:var(--radius-sm);
    color:var(--color-text);
    font-weight:650;
    text-decoration:none;
  }
  .mobile-link:hover,.mobile-link.is-active{background:var(--color-panel-soft);color:var(--color-accent-deep)}
  .mobile-language{margin-top:10px;padding-top:10px;border-top:1px solid var(--color-border)}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:640px){
  :root{--gutter:16px}
  .tilt{transform:none}
  .section{padding-top:58px;padding-bottom:58px}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column}
  .button{width:100%}
  .chip-row{flex-direction:row;align-items:flex-start}
  th,td{padding:11px 12px}
}
@media (max-width:380px){
  .site-brand span{font-size:.9rem}
  .lang-trigger{min-width:44px;padding-inline:9px}
}