:root{
  --ink-950:#050B1C;
  --ink-800:#0A1530;
  --ink-700:#16244A;
  --gold-500:#E8B44A;
  --gold-200:#F7DCA4;
  --jade-500:#23C08A;
  --jade-700:#0E7A5A;
  --magenta-500:#FF3D8B;
  --text-100:#EAF0FF;
  --text-muted:#9BAAC8;
  --glass:rgba(255,255,255,0.06);
  --glass-line:rgba(255,255,255,0.12);
  --max:1280px;
  --prose:720px;
  --aside:280px;
  --ease:cubic-bezier(0.22,0.61,0.36,1);
  --font-sans:"Noto Sans SC","Source Han Sans SC",system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-mono:"IBM Plex Mono","JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}

*,*::before,*::after{box-sizing:border-box;}

html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}

body{
  margin:0;
  min-height:100vh;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.75;
  font-weight:400;
  color:var(--text-100);
  background-color:var(--ink-950);
  background-image:
    radial-gradient(900px 620px at 10% -10%, rgba(232,180,74,0.10), transparent 62%),
    radial-gradient(820px 700px at 94% 3%, rgba(35,192,138,0.09), transparent 64%),
    radial-gradient(680px 520px at 48% 118%, rgba(255,61,139,0.07), transparent 66%);
  background-attachment:fixed;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  text-rendering:optimizeLegibility;
}

h1,h2,h3,h4{
  margin:0 0 0.6em;
  font-weight:900;
  line-height:1.15;
  letter-spacing:0.02em;
}
h1{font-size:clamp(40px,7vw,88px);line-height:1.04;}
h2{font-size:clamp(28px,3.6vw,40px);}
h3{font-size:clamp(20px,2.2vw,24px);font-weight:800;}
p{margin:0 0 1.1em;}
p:last-child{margin-bottom:0;}
a{color:var(--gold-200);text-decoration:none;}
a:hover{color:#fff;}
img{max-width:100%;height:auto;display:block;}
ul,ol{margin:0 0 1.1em;padding-left:1.2em;}
code,kbd,samp{font-family:var(--font-mono);font-size:0.92em;color:var(--gold-200);}
::selection{background:rgba(232,180,74,0.32);color:#fff;}
:focus-visible{outline:2px solid var(--gold-500);outline-offset:3px;border-radius:4px;}

.skip-link{
  position:absolute;
  left:16px;
  top:-72px;
  z-index:200;
  padding:10px 20px;
  border-radius:0 0 12px 12px;
  background:var(--gold-500);
  color:#1A1206;
  font-size:14px;
  font-weight:700;
  letter-spacing:0.08em;
  transition:top .3s var(--ease);
}
.skip-link:focus{top:0;color:#1A1206;}

.container{
  width:100%;
  max-width:var(--max);
  margin-inline:auto;
  padding-inline:clamp(18px,4vw,32px);
}

#main-content{display:block;scroll-margin-top:28px;}

.prose{max-width:var(--prose);}

.display{
  font-size:clamp(40px,7vw,88px);
  font-weight:900;
  line-height:1.04;
  letter-spacing:0.02em;
  transform-origin:left center;
}
.display--narrow{transform:scaleX(0.95);}

.vnote{
  writing-mode:vertical-rl;
  text-orientation:mixed;
  font-family:var(--font-mono);
  font-size:12px;
  line-height:1;
  letter-spacing:0.34em;
  color:var(--text-muted);
  margin:0;
}

.section-head{
  display:flex;
  align-items:flex-start;
  gap:clamp(14px,2vw,22px);
  margin-bottom:clamp(20px,3vw,34px);
}
.section-head-title{
  margin:0;
  font-size:clamp(24px,3.4vw,40px);
  font-weight:900;
  letter-spacing:0.02em;
}
.section-lead{
  margin:12px 0 0;
  max-width:60ch;
  font-size:17px;
  color:var(--text-muted);
}

.layout-split{
  display:grid;
  grid-template-columns:minmax(0,1.75fr) minmax(0,1fr);
  gap:clamp(28px,4vw,64px);
  align-items:start;
}
.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));}
@media (min-width:861px){
  .grid--offset > :nth-child(even){margin-top:32px;}
}

.panel{
  background:var(--ink-800);
  border:1px solid var(--ink-700);
  border-radius:18px;
  padding:clamp(20px,3vw,32px);
}
.panel--glass{
  background:var(--glass);
  border-color:var(--glass-line);
  -webkit-backdrop-filter:blur(16px);
  backdrop-filter:blur(16px);
}

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:5px 12px;
  border-radius:999px;
  border:1px solid var(--ink-700);
  color:var(--text-muted);
  font-family:var(--font-mono);
  font-size:12px;
  line-height:1.4;
  letter-spacing:0.12em;
  white-space:nowrap;
}
.tag--gold{color:var(--gold-200);border-color:rgba(232,180,74,0.40);background:rgba(232,180,74,0.08);}
.tag--sync{color:var(--jade-500);border-color:rgba(35,192,138,0.42);background:rgba(35,192,138,0.08);}
.tag--new{color:var(--magenta-500);border-color:rgba(255,61,139,0.42);background:rgba(255,61,139,0.08);}

.btn{
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:13px 26px;
  border:1px solid transparent;
  border-radius:999px;
  font-family:var(--font-sans);
  font-size:15px;
  font-weight:600;
  letter-spacing:0.06em;
  text-decoration:none;
  cursor:pointer;
  transition:transform .35s var(--ease),background-color .35s var(--ease),border-color .35s var(--ease),color .35s var(--ease),box-shadow .35s var(--ease);
}
.btn--gold{
  background:linear-gradient(180deg,var(--gold-200),var(--gold-500));
  color:#231A02;
  box-shadow:0 10px 30px rgba(232,180,74,0.22);
}
.btn--gold:hover{
  color:#231A02;
  transform:translateY(-2px);
  box-shadow:0 16px 40px rgba(232,180,74,0.32);
}
.btn--ghost{
  background:var(--glass);
  border-color:var(--ink-700);
  color:var(--text-100);
}
.btn--ghost:hover{
  border-color:var(--gold-500);
  color:var(--gold-200);
  transform:translateY(-2px);
}
.btn--jade{
  background:linear-gradient(180deg,var(--jade-500),var(--jade-700));
  color:#04170F;
  box-shadow:0 10px 30px rgba(35,192,138,0.20);
}
.btn--jade:hover{color:#04170F;transform:translateY(-2px);}

.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:0;
  list-style:none;
  margin:0 0 clamp(18px,2.6vw,30px);
  padding:0;
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:0.06em;
  color:var(--text-muted);
}
.breadcrumb li{display:flex;align-items:center;}
.breadcrumb li + li::before{content:"/";margin:0 10px;color:var(--ink-700);}
.breadcrumb a{color:var(--text-muted);}
.breadcrumb a:hover{color:var(--gold-200);}
.breadcrumb [aria-current="page"]{color:var(--gold-200);}

.tabs{display:flex;flex-direction:column;gap:clamp(18px,2.4vw,28px);}
.tab-list{
  display:flex;
  flex-wrap:wrap;
  gap:6px;
  align-self:flex-start;
  padding:6px;
  border-radius:999px;
  background:var(--glass);
  border:1px solid var(--glass-line);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
}
.tab{
  appearance:none;
  border:0;
  background:transparent;
  color:var(--text-muted);
  font:inherit;
  font-size:14px;
  letter-spacing:0.08em;
  padding:9px 20px;
  border-radius:999px;
  cursor:pointer;
  transition:background-color .3s var(--ease),color .3s var(--ease);
}
.tab:hover{color:var(--text-100);}
.tab[aria-selected="true"]{
  background:linear-gradient(180deg,var(--gold-200),var(--gold-500));
  color:#231A02;
  font-weight:700;
}
.tab-panel{display:none;}
.tab-panel[data-active]{display:block;}

.figure{
  display:flex;
  flex-direction:column;
  gap:12px;
  margin:0;
}
.figure-media{
  position:relative;
  width:100%;
  aspect-ratio:16 / 9;
  overflow:hidden;
  border-radius:16px;
  border:1px solid var(--ink-700);
  background-color:var(--ink-800);
  background-image:
    radial-gradient(420px 240px at 22% 0%, rgba(232,180,74,0.22), transparent 70%),
    radial-gradient(360px 260px at 88% 100%, rgba(35,192,138,0.18), transparent 72%),
    linear-gradient(140deg,var(--ink-800),var(--ink-950) 62%);
}
.figure-media img{
  width:100%;
  height:100%;
  object-fit:cover;
}
.figure-media--wide{aspect-ratio:21 / 9;}
.figure-media--tall{aspect-ratio:4 / 5;}
.figure-caption{
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:0.06em;
  color:var(--text-muted);
}

[data-reveal].is-ready{
  opacity:0;
  transform:translateY(16px);
  transition:opacity .7s var(--ease),transform .7s var(--ease);
}
[data-reveal].is-visible{
  opacity:1;
  transform:none;
}

/* ---------- Header ---------- */
.site-header{
  position:relative;
  z-index:60;
  background:linear-gradient(180deg,rgba(10,21,48,0.72),rgba(5,11,28,0.34));
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
}

.masthead{border-bottom:1px solid var(--ink-700);}

.masthead-in{
  max-width:var(--max);
  margin-inline:auto;
  padding:22px clamp(18px,4vw,32px) 16px;
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  gap:18px;
}

.masthead-rail{
  display:flex;
  align-items:center;
  gap:12px;
  margin:0;
  min-width:0;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:0.30em;
  color:var(--text-muted);
  text-transform:uppercase;
}
.masthead-rail--end{justify-content:flex-end;}
.rail-rule{
  flex:1 1 auto;
  max-width:170px;
  height:1px;
  background:linear-gradient(90deg,transparent,var(--ink-700));
}
.masthead-rail--end .rail-rule{
  background:linear-gradient(270deg,transparent,var(--ink-700));
}
.rail-num{white-space:nowrap;}

.brand{
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:8px;
  justify-self:center;
  text-align:center;
}
.brand-mark{
  font-size:clamp(26px,3.4vw,40px);
  font-weight:900;
  letter-spacing:0.08em;
  line-height:1.1;
  transform:scaleX(0.94);
  background:linear-gradient(180deg,#FFFFFF 0%,var(--gold-200) 62%,var(--gold-500) 100%);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}
.brand-sub{
  font-size:11px;
  letter-spacing:0.34em;
  color:var(--text-muted);
  white-space:nowrap;
}

.nav-toggle{
  display:none;
  align-items:center;
  gap:9px;
  padding:9px 15px;
  border-radius:999px;
  background:var(--glass);
  border:1px solid var(--glass-line);
  color:var(--text-100);
  font:inherit;
  font-size:13px;
  letter-spacing:0.14em;
  cursor:pointer;
  transition:border-color .3s var(--ease),color .3s var(--ease);
}
.nav-toggle:hover{border-color:var(--gold-500);color:var(--gold-200);}
.nav-toggle-bars{
  position:relative;
  display:block;
  width:16px;
  height:10px;
}
.nav-toggle-bars::before,
.nav-toggle-bars::after{
  content:"";
  position:absolute;
  left:0;
  width:16px;
  height:1.5px;
  background:currentColor;
  transition:transform .3s var(--ease),top .3s var(--ease);
}
.nav-toggle-bars::before{top:1px;}
.nav-toggle-bars::after{top:8px;}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::before{top:5px;transform:rotate(45deg);}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::after{top:5px;transform:rotate(-45deg);}

.nav-bar{
  border-bottom:1px solid var(--ink-700);
  background:linear-gradient(180deg,rgba(10,21,48,0.86),rgba(5,11,28,0.58));
}
.site-nav{max-width:var(--max);margin-inline:auto;}
.nav-list{
  display:flex;
  justify-content:center;
  align-items:stretch;
  gap:clamp(4px,2vw,34px);
  margin:0;
  padding:0 clamp(18px,4vw,32px);
  list-style:none;
}
.nav-link{
  position:relative;
  display:block;
  padding:16px 4px;
  font-size:15px;
  letter-spacing:0.06em;
  color:var(--text-muted);
  text-decoration:none;
  transition:color .3s var(--ease);
}
.nav-link::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  bottom:-1px;
  height:2px;
  background:var(--gold-500);
  transform:scaleX(0);
  transform-origin:center;
  transition:transform .35s var(--ease);
}
.nav-link:hover{color:var(--text-100);}
.nav-link:hover::after{transform:scaleX(0.6);}
.nav-link[aria-current="page"]{color:var(--gold-200);}
.nav-link[aria-current="page"]::after{transform:scaleX(1);}

.service-pod{
  position:fixed;
  right:clamp(16px,3vw,34px);
  bottom:clamp(18px,3vw,32px);
  z-index:90;
  display:flex;
  align-items:center;
  gap:10px;
  padding:12px 20px;
  border-radius:999px;
  background:rgba(10,21,48,0.78);
  border:1px solid rgba(232,180,74,0.42);
  color:var(--gold-200);
  font-size:14px;
  letter-spacing:0.08em;
  text-decoration:none;
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  box-shadow:0 12px 40px rgba(0,0,0,0.55),inset 0 1px 0 rgba(255,255,255,0.08);
  transition:transform .4s var(--ease),padding .4s var(--ease),width .4s var(--ease),height .4s var(--ease),border-color .4s var(--ease),color .4s var(--ease);
}
.service-pod:hover{
  color:#fff;
  border-color:var(--gold-500);
  transform:translateY(-2px);
}
.pod-dot{
  flex:0 0 auto;
  width:8px;
  height:8px;
  border-radius:50%;
  background:var(--magenta-500);
  animation:podPulse 2.4s infinite;
}
@keyframes podPulse{
  0%{box-shadow:0 0 0 0 rgba(255,61,139,0.55);}
  70%{box-shadow:0 0 0 12px rgba(255,61,139,0);}
  100%{box-shadow:0 0 0 0 rgba(255,61,139,0);}
}
.pod-text{white-space:nowrap;}
.service-pod[data-collapsed]{
  width:56px;
  height:56px;
  padding:0;
  justify-content:center;
}
.service-pod[data-collapsed] .pod-text{display:none;}

.scroll-progress{
  position:fixed;
  top:0;
  left:0;
  z-index:100;
  width:100%;
  height:3px;
  transform:scaleX(0);
  transform-origin:0 50%;
  background:linear-gradient(90deg,var(--gold-500),var(--gold-200) 55%,var(--jade-500));
  pointer-events:none;
}

/* ---------- Footer ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(60px,8vw,120px);
  border-top:1px solid var(--ink-700);
  background:linear-gradient(180deg,rgba(10,21,48,0.62),var(--ink-950) 72%);
}
.site-footer::before{
  content:"";
  position:absolute;
  top:-1px;
  left:0;
  width:min(280px,42%);
  height:2px;
  background:linear-gradient(90deg,var(--gold-500),transparent);
}
.footer-in{
  max-width:var(--max);
  margin-inline:auto;
  padding:clamp(40px,6vw,72px) clamp(18px,4vw,32px) 0;
}
.footer-brand{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  gap:14px;
  padding-bottom:26px;
  border-bottom:1px solid var(--ink-700);
}
.footer-mark{
  font-size:20px;
  font-weight:800;
  letter-spacing:0.06em;
  background:linear-gradient(180deg,#FFFFFF,var(--gold-200));
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}
.footer-tag{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:0.22em;
  color:var(--text-muted);
}
.footer-grid{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:clamp(24px,4vw,48px);
  padding:38px 0 30px;
}
.footer-col{min-width:0;}
.footer-col-title{
  margin:0 0 16px;
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:500;
  letter-spacing:0.28em;
  color:var(--gold-500);
  text-transform:uppercase;
}
.footer-list{
  display:flex;
  flex-direction:column;
  gap:11px;
  margin:0;
  padding:0;
  list-style:none;
  font-size:14px;
}
.footer-list a{
  color:var(--text-100);
  text-decoration:none;
  transition:color .3s var(--ease);
}
.footer-list a:hover{color:var(--gold-200);}
.footer-contact-item{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  line-height:1.6;
}
.footer-key{
  flex:0 0 auto;
  min-width:2.6em;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:0.18em;
  color:var(--gold-500);
}
.footer-val{
  color:var(--text-100);
  word-break:break-word;
}
.copy-btn{
  appearance:none;
  border:1px solid var(--ink-700);
  background:transparent;
  color:var(--text-muted);
  font:inherit;
  font-size:12px;
  line-height:1.4;
  letter-spacing:0.10em;
  padding:2px 10px;
  border-radius:999px;
  cursor:pointer;
  transition:color .3s var(--ease),border-color .3s var(--ease);
}
.copy-btn:hover{color:var(--gold-200);border-color:rgba(232,180,74,0.5);}
.copy-btn[data-copied]{color:var(--jade-500);border-color:rgba(35,192,138,0.5);}
.footer-icp{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:0.08em;
  color:var(--text-muted);
}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px 28px;
  padding:22px 0 34px;
  border-top:1px solid var(--ink-700);
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:0.06em;
  color:var(--text-muted);
}
.footer-bottom p{margin:0;}

/* ---------- Responsive ---------- */
@media (max-width:1040px){
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
}
@media (max-width:960px){
  .layout-split{grid-template-columns:1fr;}
  .grid--3{grid-template-columns:repeat(2,minmax(0,1fr));}
}
@media (max-width:860px){
  .masthead-in{
    grid-template-columns:40px 1fr 40px;
    padding:16px 16px 13px;
    gap:10px;
  }
  .masthead-rail{display:none;}
  .brand{grid-column:2;gap:6px;}
  .brand-mark{font-size:24px;letter-spacing:0.06em;}
  .brand-sub{font-size:10px;letter-spacing:0.26em;}
  .nav-toggle{display:flex;grid-column:3;justify-self:end;padding:8px 12px;}
  .nav-toggle-label{display:none;}
  .nav-bar{position:relative;}
  .nav-list{
    justify-content:flex-start;
    flex-wrap:nowrap;
    gap:6px;
    padding:0 14px;
    overflow-x:auto;
    scrollbar-width:none;
    -webkit-overflow-scrolling:touch;
  }
  .nav-list::-webkit-scrollbar{display:none;}
  .nav-link{
    padding:14px 10px;
    font-size:14px;
    white-space:nowrap;
  }
  .site-nav[data-open] .nav-list{
    position:absolute;
    top:100%;
    left:0;
    right:0;
    z-index:70;
    flex-direction:column;
    flex-wrap:wrap;
    gap:0;
    padding:8px 20px 18px;
    overflow:visible;
    background:rgba(10,21,48,0.97);
    border-bottom:1px solid var(--ink-700);
    box-shadow:0 24px 60px rgba(0,0,0,0.55);
    -webkit-backdrop-filter:blur(18px);
    backdrop-filter:blur(18px);
  }
  .site-nav[data-open] .nav-list > li{width:100%;}
  .site-nav[data-open] .nav-link{
    padding:14px 0;
    border-bottom:1px solid var(--ink-700);
  }
  .site-nav[data-open] .nav-link::after{
    left:0;
    right:auto;
    width:30px;
  }
  .service-pod[data-collapsed]{
    width:auto;
    height:auto;
    padding:11px 18px;
    justify-content:flex-start;
  }
  .service-pod[data-collapsed] .pod-text{display:inline;}
  .grid--2,.grid--3{grid-template-columns:1fr;}
}
@media (max-width:620px){
  body{font-size:16px;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .tab-list{border-radius:18px;}
}

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