/* =========================================================
   爱赢官网 / assets/site.css
   01 tokens · 02 reset · 03 typography · 04 layout
   05 header · 06 footer · 07 base components · 08 motion
   ========================================================= */

/* ---------- 01 tokens ---------- */
:root{
  --ink:#0B1230;
  --ink-2:#151F42;
  --panel:#1C2A55;
  --cyan:#35D6FF;
  --amber:#FFB347;
  --paper:#F4F7FF;
  --muted:#AEBAD6;
  --line:#2A3A66;
  --line-strong:#3C527F;
  --ok:#4ADE80;
  --warn:#FF7A7A;
  --font-cn:"HarmonyOS Sans SC","Source Han Sans SC","Noto Sans SC",system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --shell:1180px;
  --gutter:clamp(16px,4vw,40px);
  --radius:2px;
  --ease:cubic-bezier(.22,.61,.36,1);
}

/* ---------- 02 reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,h6,p,figure,blockquote,dl,dd{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
img,svg,video{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px}

/* ---------- 03 typography ---------- */
body{
  min-height:100vh;
  background-color:var(--ink);
  background-image:
    linear-gradient(to right,rgba(42,58,102,.34) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(42,58,102,.20) 1px,transparent 1px);
  background-size:96px 96px,96px 96px;
  color:var(--paper);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.85;
  font-weight:400;
  letter-spacing:.005em;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{font-weight:900;letter-spacing:-.022em;line-height:1.14;color:var(--paper)}
h1{font-size:clamp(38px,6.2vw,80px);line-height:1.04}
h2{font-size:clamp(26px,3.4vw,44px)}
h3{font-size:clamp(20px,2.2vw,27px);line-height:1.24}
h4{font-size:clamp(17px,1.5vw,20px);line-height:1.35}
p{max-width:none}
strong,b{font-weight:800}
.mono{font-family:var(--font-mono);font-size:12.5px;letter-spacing:.12em;text-transform:uppercase}
.eyebrow{
  display:inline-flex;align-items:center;gap:9px;
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.24em;
  text-transform:uppercase;color:var(--cyan);
}
.eyebrow::before{content:"";width:20px;height:1px;background:currentColor;flex:0 0 auto}
.prose{max-width:70ch}
.prose p+p{margin-top:1.1em}
.prose h2{margin-top:1.6em;margin-bottom:.5em}
.prose h3{margin-top:1.4em;margin-bottom:.4em}
.prose ul,.prose ol{margin:1em 0;padding-left:1.2em;list-style:disc}
.prose li+li{margin-top:.4em}
#main-content{display:block;scroll-margin-top:110px}

/* ---------- 04 layout ---------- */
.shell{width:100%;max-width:var(--shell);margin-inline:auto;padding-inline:var(--gutter)}
.section{padding-block:clamp(40px,7vw,88px)}
.section--tight{padding-block:clamp(22px,3.6vw,44px)}
.divider{height:1px;background:var(--line);border:0;width:100%}
.grid{display:grid;gap:clamp(16px,2.4vw,28px)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--asym{grid-template-columns:minmax(0,1fr) minmax(0,2.2fr)}
.breadcrumbs{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.14em;
  text-transform:uppercase;color:var(--muted);
}
.breadcrumbs a{color:var(--muted)}
.breadcrumbs a:hover{color:var(--cyan)}
.breadcrumbs span[aria-current="page"]{color:var(--paper)}
.breadcrumbs__sep{color:var(--line-strong)}

/* ---------- 05 header ---------- */
.skip-link{
  position:fixed;top:10px;left:10px;z-index:200;
  transform:translateY(-180%);
  padding:10px 16px;background:var(--cyan);color:#06152c;
  font-weight:800;font-size:14px;border-radius:var(--radius);
  transition:transform .18s var(--ease);
}
.skip-link:focus{transform:translateY(0)}

.site-header{
  position:sticky;top:0;z-index:80;
  padding:18px var(--gutter) 0;
  transition:padding .22s var(--ease);
}
.header-bar{
  position:relative;
  display:flex;align-items:center;gap:clamp(8px,1.4vw,18px);
  max-width:var(--shell);margin-inline:auto;
  padding:9px 12px 9px 16px;
  background:rgba(21,31,66,.92);
  border:1px solid var(--line);
  border-radius:999px;
  box-shadow:0 22px 44px -34px #000;
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  transition:background .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.site-header[data-scrolled]{padding-top:9px}
.site-header[data-scrolled] .header-bar{
  background:rgba(11,18,48,.97);
  border-color:var(--line-strong);
  box-shadow:0 26px 50px -30px #000;
}

.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;border-radius:999px}
.brand__glyph{
  display:grid;place-items:center;
  width:34px;height:34px;flex:0 0 auto;
  border:1px solid var(--cyan);
  border-radius:9px;
  color:var(--cyan);font-weight:900;font-size:16px;line-height:1;
  letter-spacing:0;
}
.brand__text{display:flex;flex-direction:column;line-height:1.06;gap:2px}
.brand__cn{font-size:16px;font-weight:900;letter-spacing:.16em}
.brand__en{
  font-family:var(--font-mono);font-size:9px;letter-spacing:.2em;
  text-transform:uppercase;color:var(--muted);white-space:nowrap;
}
.brand--footer .brand__glyph{width:38px;height:38px;font-size:18px}
.brand--footer .brand__cn{font-size:18px}

.lang{
  display:inline-flex;align-items:center;gap:2px;flex:0 0 auto;
  padding:2px;border:1px solid var(--line);border-radius:999px;
}
.lang__opt{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;
  padding:3px 8px;border-radius:999px;color:var(--muted);
  transition:background .16s var(--ease),color .16s var(--ease);
}
.lang__opt:hover{color:var(--paper)}
.lang__opt[aria-pressed="true"]{background:var(--panel);color:var(--paper)}

.nav{flex:1 1 auto;display:flex;justify-content:center;min-width:0}
.nav__list{display:flex;align-items:center;gap:2px}
.nav__item{display:flex}
.nav__link{
  position:relative;display:inline-flex;align-items:center;
  padding:8px 12px;border-radius:999px;
  font-size:14px;font-weight:600;line-height:1.2;color:var(--muted);
  white-space:nowrap;
  transition:color .16s var(--ease),background .16s var(--ease);
}
.nav__link::after{
  content:"";width:4px;height:4px;margin-left:7px;
  background:var(--cyan);opacity:0;transform:rotate(45deg) scale(.6);
  transition:opacity .16s var(--ease),transform .16s var(--ease);
}
.nav__link:hover{color:var(--paper);background:rgba(53,214,255,.09)}
.nav__link:hover::after{opacity:.9;transform:rotate(45deg) scale(1)}
.nav__link[aria-current="page"]{
  color:#06152c;background:var(--cyan);font-weight:800;
}
.nav__link[aria-current="page"]::after{background:#06152c;opacity:1;transform:rotate(45deg) scale(1)}

.header-actions{display:flex;align-items:center;gap:8px;flex:0 0 auto;margin-left:auto}
.search-entry{
  display:inline-flex;align-items:center;gap:8px;
  padding:7px 12px;border:1px solid var(--line);border-radius:999px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;
  color:var(--muted);
  transition:border-color .16s var(--ease),color .16s var(--ease);
}
.search-entry:hover{border-color:var(--cyan);color:var(--cyan)}
.search-entry__icon{
  position:relative;width:11px;height:11px;flex:0 0 auto;
  border:1.5px solid currentColor;border-radius:50%;
}
.search-entry__icon::after{
  content:"";position:absolute;right:-4px;bottom:-3px;
  width:5px;height:1.5px;background:currentColor;transform:rotate(45deg);
}

.nav-toggle{
  display:none;flex:0 0 auto;
  width:40px;height:40px;
  align-items:center;justify-content:center;
  border:1px solid var(--line);border-radius:999px;color:var(--paper);
  transition:border-color .16s var(--ease),color .16s var(--ease);
}
.nav-toggle:hover{border-color:var(--cyan);color:var(--cyan)}
.nav-toggle__bars{display:flex;flex-direction:column;gap:4px;width:16px}
.nav-toggle__bars span{
  display:block;height:2px;border-radius:2px;background:currentColor;
  transition:transform .2s var(--ease),opacity .16s var(--ease);
}
.site-header[data-open] .nav-toggle__bars span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.site-header[data-open] .nav-toggle__bars span:nth-child(2){opacity:0}
.site-header[data-open] .nav-toggle__bars span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

/* ---------- 06 footer ---------- */
.site-footer{
  margin-top:clamp(64px,9vw,132px);
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(21,31,66,.94) 0%,#080e26 100%);
}
.footer-shell{
  max-width:var(--shell);margin-inline:auto;
  padding:clamp(38px,5.6vw,72px) var(--gutter) 22px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.5fr;
  gap:clamp(22px,3.4vw,48px);
  align-items:start;
}
.footer-col{min-width:0}
.footer-col:nth-child(2){margin-top:16px}
.footer-col:nth-child(3){margin-top:34px}
.footer-col:nth-child(4){margin-top:6px}
.footer-heading{
  font-family:var(--font-mono);font-size:11px;font-weight:600;
  letter-spacing:.22em;text-transform:uppercase;color:var(--cyan);
  margin-bottom:14px;
}
.footer-list{display:flex;flex-direction:column;gap:9px}
.footer-link{
  display:inline-flex;align-items:center;
  font-size:14.5px;color:var(--muted);
  transition:color .16s var(--ease);
}
.footer-link::before{
  content:"";width:0;height:1px;background:var(--cyan);
  margin-right:0;transition:width .18s var(--ease),margin-right .18s var(--ease);
}
.footer-link:hover{color:var(--paper)}
.footer-link:hover::before{width:14px;margin-right:8px}
.footer-note{
  margin-top:14px;font-size:13px;line-height:1.8;color:var(--muted);max-width:34ch;
}
.footer-meta{
  margin-top:14px;
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.1em;
  color:var(--muted);text-transform:uppercase;
}
.footer-meta .mono{color:var(--line-strong);margin-right:6px}
.contact-row{
  display:flex;align-items:center;flex-wrap:wrap;gap:8px;
  padding-block:9px;border-bottom:1px dashed var(--line);
}
.contact-row__label{
  flex:0 0 auto;
  font-family:var(--font-mono);font-size:10.5px;letter-spacing:.18em;
  text-transform:uppercase;color:var(--line-strong);min-width:46px;
}
.contact-row__value{font-size:13.5px;color:var(--paper);word-break:break-all}
.copy-btn{
  margin-left:auto;
  font-family:var(--font-mono);font-size:10.5px;letter-spacing:.12em;
  padding:3px 8px;border:1px solid var(--line);border-radius:var(--radius);
  color:var(--muted);
  transition:border-color .16s var(--ease),color .16s var(--ease),background .16s var(--ease);
}
.copy-btn:hover{border-color:var(--cyan);color:var(--cyan)}
.copy-btn[data-copied]{border-color:var(--ok);color:var(--ok)}
.footer-base{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  margin-top:clamp(28px,4vw,48px);padding-top:18px;
  border-top:1px solid var(--line);
}
.footer-copy{
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.12em;
  text-transform:uppercase;color:var(--muted);
}
.to-top{
  display:inline-flex;align-items:center;gap:8px;
  padding:7px 14px;border:1px solid var(--line);border-radius:999px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;
  text-transform:uppercase;color:var(--muted);
  transition:border-color .16s var(--ease),color .16s var(--ease);
}
.to-top::after{content:"↑";font-size:12px}
.to-top:hover{border-color:var(--amber);color:var(--amber)}

/* ---------- 07 base components ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 20px;border:1px solid transparent;border-radius:var(--radius);
  font-size:14.5px;font-weight:800;line-height:1.2;letter-spacing:.02em;
  transition:background .16s var(--ease),color .16s var(--ease),
             border-color .16s var(--ease),transform .16s var(--ease);
}
.btn:active{transform:translateY(1px)}
.btn--sm{padding:8px 14px;font-size:13px}
.btn--amber{background:var(--amber);color:#1a1000}
.btn--amber:hover{background:#ffc775}
.btn--cyan{background:var(--cyan);color:#06152c}
.btn--cyan:hover{background:#63e2ff}
.btn--ghost{background:rgba(28,42,85,.55);border-color:var(--line);color:var(--paper)}
.btn--ghost:hover{border-color:var(--cyan);color:var(--cyan)}

.panel{
  background:var(--ink-2);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:clamp(18px,2.4vw,28px);
}
.card{
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:clamp(18px,2.4vw,28px);
  transition:border-color .18s var(--ease),transform .18s var(--ease),background .18s var(--ease);
}
.card:hover{border-color:var(--line-strong);background:#20305f}
.chip{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 10px;border:1px solid var(--line);border-radius:var(--radius);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;
  text-transform:uppercase;color:var(--muted);
}
.tag{
  display:inline-flex;align-items:center;
  padding:3px 8px;border-radius:var(--radius);
  background:rgba(53,214,255,.12);color:var(--cyan);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;
}
.badge{
  display:inline-flex;align-items:center;gap:7px;
  padding:4px 10px;border:1px solid var(--line);border-radius:999px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;
  text-transform:uppercase;color:var(--paper);
}
.status-dot{
  display:inline-block;width:7px;height:7px;flex:0 0 auto;
  border-radius:50%;background:var(--cyan);
  box-shadow:0 0 0 3px rgba(53,214,255,.18);
}
.status-dot--ok{background:var(--ok);box-shadow:0 0 0 3px rgba(74,222,128,.18)}
.status-dot--warn{background:var(--warn);box-shadow:0 0 0 3px rgba(255,122,122,.18)}

.media{
  position:relative;overflow:hidden;
  aspect-ratio:16/10;
  border:1px solid var(--line);border-radius:var(--radius);
  background:linear-gradient(140deg,var(--panel) 0%,var(--ink) 80%);
}
.media::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    linear-gradient(to right,rgba(53,214,255,.10) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(53,214,255,.10) 1px,transparent 1px);
  background-size:28px 28px;
}
.media img,.media svg,.media video{position:relative;width:100%;height:100%;object-fit:cover}
.media--wide{aspect-ratio:21/9}
.media--tall{aspect-ratio:3/4}
.media--square{aspect-ratio:1/1}
.media__label{
  position:absolute;left:12px;bottom:12px;z-index:2;
  padding:4px 9px;background:rgba(11,18,48,.86);
  border:1px solid var(--line);border-radius:var(--radius);
  font-family:var(--font-mono);font-size:10.5px;letter-spacing:.16em;
  text-transform:uppercase;color:var(--cyan);
}

.ticker{
  position:relative;display:flex;align-items:center;gap:14px;
  overflow:hidden;
  padding-block:10px;
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  background:var(--ink-2);
}
.ticker__track{
  display:flex;align-items:center;gap:34px;
  white-space:nowrap;min-width:100%;
  animation:ticker-scroll 46s linear infinite;
}
.ticker.is-paused .ticker__track{animation-play-state:paused}
.ticker__item{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--font-mono);font-size:12.5px;letter-spacing:.14em;
  text-transform:uppercase;color:var(--muted);
}
.ticker__item::before{
  content:"";width:6px;height:6px;flex:0 0 auto;
  background:var(--amber);transform:rotate(45deg);
}
.ticker__control{
  position:relative;z-index:2;flex:0 0 auto;
  margin-right:12px;padding:4px 10px;
  border:1px solid var(--line);border-radius:999px;
  font-family:var(--font-mono);font-size:10.5px;letter-spacing:.14em;
  text-transform:uppercase;color:var(--muted);
  transition:border-color .16s var(--ease),color .16s var(--ease);
}
.ticker__control:hover{border-color:var(--amber);color:var(--amber)}
@keyframes ticker-scroll{
  from{transform:translateX(0)}
  to{transform:translateX(-50%)}
}

.toc{position:sticky;top:104px}
.toc__list{display:flex;flex-direction:column;gap:2px;border-left:1px solid var(--line)}
.toc__link{
  display:block;padding:7px 0 7px 14px;
  font-size:13.5px;line-height:1.5;color:var(--muted);
  border-left:2px solid transparent;margin-left:-1px;
  transition:color .16s var(--ease),border-color .16s var(--ease);
}
.toc__link:hover{color:var(--paper)}
.toc__link[aria-current="true"]{color:var(--cyan);border-left-color:var(--cyan);font-weight:700}

.scroll-progress{
  position:fixed;top:0;left:0;z-index:120;
  height:2px;width:0;
  background:linear-gradient(90deg,var(--cyan),var(--amber));
  transition:width .08s linear;
}

/* reveal */
.js [data-reveal]{
  opacity:0;transform:translateY(12px);
  transition:opacity .38s var(--ease),transform .38s var(--ease);
}
.js [data-reveal].is-visible{opacity:1;transform:none}

/* ---------- responsive ---------- */
@media (max-width:1180px){
  .nav__link{padding:8px 9px;font-size:13.5px}
  .brand__en{display:none}
}
@media (max-width:1080px){
  .lang{display:none}
  .search-entry__text{display:none}
  .search-entry{padding:8px 10px}
}
@media (max-width:980px){
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-col:nth-child(2),
  .footer-col:nth-child(3),
  .footer-col:nth-child(4){margin-top:0}
  .grid--asym{grid-template-columns:minmax(0,1fr)}
  .toc{position:static}
}
@media (max-width:900px){
  .site-header{padding:10px var(--gutter) 0}
  .site-header[data-scrolled]{padding-top:8px}
  .header-bar{padding:8px 10px 8px 12px;border-radius:999px}
  .nav-toggle{display:inline-flex}
  .header-actions{margin-left:0}
  .header-actions .search-entry{display:none}
  .nav{
    display:none;
    position:absolute;top:calc(100% + 10px);left:0;right:0;
    flex-direction:column;
  }
  .site-header[data-open] .nav{
    display:flex;
    padding:10px;
    background:#101a3c;
    border:1px solid var(--line-strong);
    border-radius:14px;
    box-shadow:0 34px 60px -30px #000;
    max-height:calc(100vh - 130px);
    overflow:auto;
  }
  .nav__list{flex-direction:column;align-items:stretch;gap:2px;width:100%}
  .nav__item{width:100%}
  .nav__link{
    width:100%;justify-content:space-between;padding:13px 14px;
    border-radius:10px;font-size:15.5px;
  }
  .nav__link::after{order:2;margin-left:auto}
  .grid--2,.grid--3{grid-template-columns:minmax(0,1fr)}
  .section{padding-block:clamp(32px,8vw,56px)}
}
@media (max-width:640px){
  body{font-size:15.5px}
  .footer-grid{grid-template-columns:minmax(0,1fr)}
  .footer-base{flex-direction:column;align-items:flex-start}
  .btn--sm{padding:8px 12px;font-size:12.5px}
  .ticker__item{font-size:11.5px;letter-spacing:.1em}
}

/* ---------- 08 motion / a11y ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  .ticker__track{animation:none}
  .js [data-reveal]{opacity:1;transform:none}
}