:root{
  --ink:#0A1220;
  --ink-deep:#141C28;
  --panel:#101C2F;
  --grid:#1E2E47;
  --mint:#2BE3B0;
  --mint-deep:#04221B;
  --amber:#F2B23C;
  --ember:#FF6B35;
  --paper:#F4EFE6;
  --text:#E9EEF5;
  --muted:#93A6C0;
  --radius-lg:26px;
  --radius-md:18px;
  --radius-sm:12px;
  --radius-pill:999px;
  --font-display:"Barlow Condensed","Oswald","HarmonyOS Sans SC","Source Han Sans SC","Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"Inter","HarmonyOS Sans SC","Source Han Sans SC","Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:"JetBrains Mono","SF Mono",ui-monospace,Menlo,Consolas,"Courier New",monospace;
  --page-max:1240px;
  --gutter:clamp(16px,4vw,44px);
  --header-h:70px;
  --ease:180ms cubic-bezier(.32,.72,.24,1);
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--ink);
  color:var(--text);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4,h5,p,figure,blockquote{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
img,svg,video{display:block;max-width:100%;}
button{font:inherit;color:inherit;background:none;border:0;padding:0;}
a{color:inherit;}
table{border-collapse:collapse;width:100%;}
strong{font-weight:700;}

:focus-visible{
  outline:2px solid var(--mint);
  outline-offset:3px;
  border-radius:6px;
  box-shadow:0 0 0 5px rgba(43,227,176,.18);
}
a:focus:not(:focus-visible){outline:none;}

.sr-only{
  position:absolute;width:1px;height:1px;padding:0;margin:-1px;
  overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0;
}

.skip-link{
  position:absolute;left:12px;top:-64px;z-index:200;
  display:inline-flex;align-items:center;
  padding:10px 18px;
  border-radius:var(--radius-pill);
  background:var(--mint);color:var(--mint-deep);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.12em;
  text-decoration:none;font-weight:700;
  transition:top var(--ease);
}
.skip-link:focus-visible{top:10px;}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:90;
  background:rgba(10,18,32,.94);
  border-bottom:1px solid var(--grid);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  transition:box-shadow var(--ease);
}
.site-header[data-scrolled]{box-shadow:0 14px 34px rgba(3,8,16,.55);}

.header-ruler{
  height:5px;
  background-image:repeating-linear-gradient(90deg,rgba(30,46,71,.95) 0 1px,transparent 1px 14px);
  background-repeat:repeat-x;
  background-position:0 100%;
}

.header-inner{
  position:relative;
  display:flex;align-items:center;
  gap:clamp(10px,1.8vw,26px);
  width:100%;max-width:var(--page-max);
  margin-inline:auto;
  padding:11px var(--gutter);
}

.brand{
  display:inline-flex;align-items:center;gap:10px;
  flex:0 0 auto;text-decoration:none;
}
.brand-mark{
  position:relative;
  width:26px;height:26px;flex:0 0 auto;
  border-radius:8px;
  background:linear-gradient(150deg,var(--mint),#12A181);
  box-shadow:0 0 0 1px rgba(43,227,176,.4),0 8px 20px rgba(43,227,176,.18);
}
.brand-mark::before,
.brand-mark::after{
  content:"";position:absolute;top:50%;width:3px;height:10px;
  transform:translateY(-50%);
  border-radius:2px;background:rgba(4,34,27,.92);
}
.brand-mark::before{left:8px;}
.brand-mark::after{left:15px;}

.brand-name{
  font-family:var(--font-display);
  font-weight:800;font-size:20px;line-height:1;
  letter-spacing:-.01em;color:var(--text);
}
.brand-name::after{
  content:"";display:inline-block;
  width:6px;height:6px;margin-left:8px;vertical-align:middle;
  border-radius:50%;background:var(--mint);
  box-shadow:0 0 10px rgba(43,227,176,.85);
}
.brand-sub{
  font-family:var(--font-mono);
  font-size:9px;letter-spacing:.22em;
  color:var(--muted);white-space:nowrap;
}

.site-nav{position:relative;flex:1 1 auto;display:flex;justify-content:center;min-width:0;}
.nav-list{display:flex;align-items:center;gap:clamp(0px,.8vw,10px);}
.nav-link{
  position:relative;
  display:inline-flex;align-items:baseline;gap:6px;
  padding:10px 9px 12px;
  color:var(--muted);text-decoration:none;
  font-size:14px;font-weight:500;letter-spacing:.01em;
  white-space:nowrap;
  transition:color var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:9px;right:9px;bottom:4px;height:2px;
  border-radius:2px;background:var(--mint);
  transform:scaleX(0);transform-origin:0 50%;
  transition:transform var(--ease);
}
.nav-link:hover{color:var(--text);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link[aria-current="page"]{color:var(--text);font-weight:700;}
.nav-link[aria-current="page"]::after{transform:scaleX(1);}
.nav-idx{
  font-family:var(--font-mono);
  font-size:10px;letter-spacing:.06em;
  color:var(--mint);opacity:.8;
}

.header-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto;}

.countdown{
  display:inline-flex;align-items:center;gap:7px;
  padding:6px 12px;
  border-radius:var(--radius-pill);
  border:1px solid rgba(255,107,53,.42);
  background:rgba(255,107,53,.12);
  color:var(--ember);
  font-family:var(--font-mono);
  font-size:12px;letter-spacing:.06em;
  font-variant-numeric:tabular-nums;
  white-space:nowrap;
}
.countdown-dot{
  width:6px;height:6px;border-radius:50%;
  background:var(--ember);
  box-shadow:0 0 0 3px rgba(255,107,53,.16);
  animation:ember-breathe 2s ease-in-out infinite;
}
.countdown-label{font-size:10px;letter-spacing:.14em;opacity:.85;}
.countdown-value{font-weight:700;letter-spacing:.02em;}
.countdown[data-countdown-state="soon"]{
  background:var(--ember);color:#2A0D00;border-color:var(--ember);
}
.countdown[data-countdown-state="soon"] .countdown-dot{background:#2A0D00;box-shadow:none;}

@keyframes ember-breathe{
  0%,100%{opacity:1;}
  50%{opacity:.35;}
}

.nav-toggle{
  display:none;align-items:center;gap:8px;
  padding:8px 14px;
  border-radius:var(--radius-pill);
  border:1px solid var(--grid);
  font-family:var(--font-mono);
  font-size:12px;letter-spacing:.12em;
  color:var(--muted);cursor:pointer;
  transition:border-color var(--ease),color var(--ease);
}
.nav-toggle:hover{border-color:var(--mint);color:var(--mint);}
.nav-toggle-bars{position:relative;display:inline-block;width:14px;height:10px;}
.nav-toggle-bars::before,
.nav-toggle-bars::after{
  content:"";position:absolute;left:0;width:100%;height:1.5px;
  background:currentColor;transition:transform var(--ease);
}
.nav-toggle-bars::before{top:1px;}
.nav-toggle-bars::after{bottom:1px;}
.nav-toggle[data-active] .nav-toggle-bars::before{transform:translateY(3.5px) rotate(45deg);}
.nav-toggle[data-active] .nav-toggle-bars::after{transform:translateY(-3.5px) rotate(-45deg);}

.scroll-meter{
  position:absolute;left:0;right:0;bottom:-1px;height:2px;
  overflow:hidden;pointer-events:none;
}
.scroll-meter span{
  display:block;height:100%;width:100%;
  transform:scaleX(0);transform-origin:0 50%;
  background:linear-gradient(90deg,var(--mint),var(--amber));
}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;
  border-radius:var(--radius-pill);
  border:1px solid transparent;
  font-family:var(--font-body);
  font-size:14px;font-weight:600;letter-spacing:.03em;
  text-decoration:none;cursor:pointer;
  transition:transform var(--ease),background-color var(--ease),border-color var(--ease),color var(--ease);
}
.btn-primary{background:var(--mint);color:var(--mint-deep);}
.btn-primary:hover{background:#59F2C6;}
.btn-ghost{background:transparent;border-color:var(--grid);color:var(--text);}
.btn-ghost:hover{border-color:var(--mint);color:var(--mint);}
.btn-amber{background:var(--amber);color:#2A1B00;}
.btn-amber:hover{background:#FFC65C;}
.btn-sm{padding:8px 16px;font-size:13px;}
.btn-block{width:100%;}
.btn:hover{transform:translateY(-1px);}

/* ---------- tags & chips ---------- */
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 10px;
  border-radius:var(--radius-pill);
  border:1px solid var(--grid);
  font-family:var(--font-mono);
  font-size:11px;letter-spacing:.1em;text-transform:uppercase;
  color:var(--muted);
}
.tag--mint{color:var(--mint);border-color:rgba(43,227,176,.42);background:rgba(43,227,176,.1);}
.tag--amber{color:var(--amber);border-color:rgba(242,178,60,.42);background:rgba(242,178,60,.1);}
.tag--ember{color:var(--ember);border-color:rgba(255,107,53,.42);background:rgba(255,107,53,.12);}

.chip{
  display:inline-flex;align-items:center;gap:6px;
  padding:8px 15px;
  border-radius:var(--radius-pill);
  border:1px solid var(--grid);
  background:transparent;
  color:var(--muted);
  font-size:13px;letter-spacing:.03em;
  cursor:pointer;
  transition:background-color var(--ease),border-color var(--ease),color var(--ease);
}
.chip:hover{border-color:var(--mint);color:var(--text);}
.chip[aria-pressed="true"]{
  background:var(--mint);border-color:var(--mint);
  color:var(--mint-deep);font-weight:700;
}
.chip[aria-pressed="true"]::before{content:"✓";font-size:11px;}

/* ---------- layout ---------- */
.shell{width:100%;max-width:var(--page-max);margin-inline:auto;padding-inline:var(--gutter);}
.section{padding-block:clamp(44px,6vw,92px);}
.section-head{
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,.9fr);
  gap:clamp(12px,3vw,44px);
  align-items:end;
  margin-bottom:clamp(22px,3vw,40px);
}
.section-head > *{min-width:0;}
.index-tag{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--font-mono);
  font-size:11px;letter-spacing:.2em;text-transform:uppercase;
  color:var(--mint);
}
.index-tag::before{content:"";width:22px;height:1px;background:var(--mint);}
.section-title{
  font-family:var(--font-display);
  font-weight:800;
  font-size:clamp(28px,4.4vw,56px);
  line-height:1.02;
  letter-spacing:-.01em;
  margin-top:10px;
}
.section-note{color:var(--muted);font-size:15px;line-height:1.8;}

.crumbs{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-family:var(--font-mono);
  font-size:12px;letter-spacing:.06em;
  color:var(--muted);
  padding-block:18px;
}
.crumbs a{color:var(--muted);text-decoration:none;border-bottom:1px solid transparent;transition:color var(--ease),border-color var(--ease);}
.crumbs a:hover{color:var(--mint);border-bottom-color:var(--mint);}
.crumbs > * + *::before{content:"/";margin-right:8px;color:var(--grid);}
.crumbs [aria-current="page"]{color:var(--text);}

.grid-12{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:clamp(16px,2vw,28px);}
.auto-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(260px,100%),1fr));gap:clamp(16px,2vw,26px);}
.scale-band{
  height:14px;
  background-image:repeating-linear-gradient(90deg,var(--grid) 0 1px,transparent 1px 20px);
  background-repeat:repeat-x;background-position:0 0;background-size:auto 8px;
  opacity:.85;
}

.panel{
  background:var(--panel);
  border:1px solid var(--grid);
  border-radius:var(--radius-lg);
  padding:clamp(20px,3vw,32px);
}
.card{
  position:relative;
  background:var(--panel);
  border:1px solid var(--grid);
  border-radius:var(--radius-lg);
  padding:clamp(18px,2.6vw,28px);
  transition:border-color var(--ease),transform var(--ease),box-shadow var(--ease);
}
.card:hover{
  border-color:var(--mint);
  transform:translateY(-2px);
  box-shadow:0 18px 40px rgba(3,8,16,.5);
}

.prose{
  background:var(--paper);
  color:var(--ink-deep);
  border-radius:var(--radius-lg);
  padding:clamp(24px,4vw,58px);
  max-width:72ch;
  font-size:16.5px;line-height:1.8;
}
.prose h2,.prose h3{color:var(--ink-deep);font-family:var(--font-display);font-weight:800;line-height:1.1;letter-spacing:-.01em;}
.prose h2{font-size:clamp(24px,3.2vw,34px);margin-top:1.6em;}
.prose h3{font-size:clamp(19px,2.2vw,24px);margin-top:1.4em;}
.prose p{margin-top:1em;}
.prose ul,.prose ol{margin-top:1em;padding-left:1.2em;list-style:disc;}
.prose ol{list-style:decimal;}
.prose li{margin-top:.45em;}
.prose a{color:#0B7A61;text-decoration:underline;text-underline-offset:3px;}
.prose strong{color:#0A1220;}

/* ---------- image frame ---------- */
.img-frame{
  position:relative;overflow:hidden;isolation:isolate;
  border-radius:var(--radius-lg);
  border:1px solid var(--grid);
  background:linear-gradient(160deg,#132238,#0B1526);
}
.img-frame::before{
  content:"";position:absolute;inset:0;z-index:1;pointer-events:none;
  background-image:
    linear-gradient(var(--grid) 1px,transparent 1px),
    linear-gradient(90deg,var(--grid) 1px,transparent 1px);
  background-size:28px 28px;
  opacity:.26;
}
.img-frame::after{
  content:"";position:absolute;inset:0;z-index:2;pointer-events:none;
  background:linear-gradient(180deg,rgba(10,18,32,0) 34%,rgba(10,18,32,.82) 100%);
}
.img-frame > img{
  width:100%;height:100%;object-fit:cover;
  filter:saturate(.92) contrast(1.04);
}
.img-frame--wide{aspect-ratio:16/9;}
.img-frame--tall{aspect-ratio:3/4;}
.img-frame--square{aspect-ratio:1/1;}
.img-frame--overlay{border-color:rgba(43,227,176,.34);box-shadow:inset 0 0 0 1px rgba(43,227,176,.16);}
.img-frame--paper{
  border-color:rgba(20,28,40,.16);
  background:linear-gradient(160deg,#EAE3D6,#DED5C6);
}
.img-frame--paper::before{
  background-image:
    linear-gradient(rgba(20,28,40,.12) 1px,transparent 1px),
    linear-gradient(90deg,rgba(20,28,40,.12) 1px,transparent 1px);
}
.img-frame--paper::after{background:linear-gradient(180deg,rgba(20,28,40,0) 46%,rgba(20,28,40,.28) 100%);}

/* ---------- segmented tabs ---------- */
.seg-tabs{
  display:inline-flex;flex-wrap:wrap;gap:4px;padding:4px;
  border:1px solid var(--grid);
  border-radius:var(--radius-pill);
  background:rgba(16,28,47,.72);
}
.seg-tab{
  padding:8px 16px;
  border-radius:var(--radius-pill);
  font-size:13px;font-weight:600;letter-spacing:.02em;
  color:var(--muted);cursor:pointer;
  transition:background-color var(--ease),color var(--ease);
}
.seg-tab:hover{color:var(--text);}
.seg-tab[aria-selected="true"]{background:var(--mint);color:var(--mint-deep);}
.seg-panel[hidden]{display:none;}

/* ---------- accordion ---------- */
.accordion{border-top:1px solid var(--grid);}
.accordion-item{border-bottom:1px solid var(--grid);}
.accordion-trigger{
  display:flex;width:100%;align-items:center;justify-content:space-between;gap:16px;
  padding:19px 4px;
  text-align:left;font-size:16px;font-weight:600;color:var(--text);
  cursor:pointer;transition:color var(--ease);
}
.accordion-trigger:hover{color:var(--mint);}
.accordion-trigger::after{
  content:"+";font-family:var(--font-mono);font-size:18px;line-height:1;
  color:var(--mint);transition:transform var(--ease);
}
.accordion-item[data-open] .accordion-trigger::after{content:"–";}
.accordion-panel{
  display:none;padding:0 4px 22px;
  color:var(--muted);font-size:15px;line-height:1.85;
}
.accordion-item[data-open] .accordion-panel{display:block;}

/* ---------- copy button / status ---------- */
.copy-btn{
  display:inline-flex;align-items:center;gap:6px;
  padding:3px 10px;
  border-radius:var(--radius-pill);
  border:1px solid var(--grid);
  font-family:var(--font-mono);
  font-size:11px;letter-spacing:.1em;
  color:var(--muted);cursor:pointer;
  transition:border-color var(--ease),color var(--ease),background-color var(--ease);
}
.copy-btn:hover{border-color:var(--mint);color:var(--mint);}
.copy-btn[data-copied="true"]{border-color:var(--mint);color:var(--mint);background:rgba(43,227,176,.12);}
.copy-btn[data-copied="false"]{border-color:var(--ember);color:var(--ember);}

.status-light{
  display:inline-block;
  width:7px;height:7px;margin-right:8px;
  border-radius:50%;background:var(--mint);
  box-shadow:0 0 0 3px rgba(43,227,176,.14);
  vertical-align:middle;
}

main [id]{scroll-margin-top:calc(var(--header-h) + 22px);}

/* ---------- footer ---------- */
.site-footer{
  position:relative;
  background:var(--ink);
  border-top:1px solid var(--grid);
  color:var(--muted);
}
.footer-scale{
  height:16px;
  background-image:repeating-linear-gradient(90deg,var(--grid) 0 1px,transparent 1px 22px);
  background-repeat:repeat-x;
  background-position:0 0;
  background-size:auto 8px;
  opacity:.9;
}
.footer-inner{
  width:100%;max-width:var(--page-max);
  margin-inline:auto;
  padding:clamp(34px,5vw,58px) var(--gutter) 0;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.5fr;
  gap:clamp(22px,3.4vw,48px);
}
.footer-col{min-width:0;}
.brand-footer .brand-name{font-size:19px;}
.footer-tagline{
  margin-top:16px;
  font-size:14px;line-height:1.85;
  color:var(--muted);
  max-width:26ch;
}
.footer-title{
  position:relative;
  padding-left:12px;
  margin-bottom:16px;
  font-family:var(--font-mono);
  font-size:11px;font-weight:700;
  letter-spacing:.22em;text-transform:uppercase;
  color:var(--text);
}
.footer-title::before{
  content:"";position:absolute;left:0;top:50%;
  width:3px;height:12px;transform:translateY(-50%);
  border-radius:2px;background:var(--mint);
}
.footer-list{display:flex;flex-direction:column;gap:2px;}
.footer-list a{
  position:relative;
  display:inline-flex;align-items:center;gap:8px;
  padding:5px 0;
  color:var(--muted);text-decoration:none;
  font-size:14.5px;
  transition:color var(--ease);
}
.footer-list a::before{
  content:"";width:6px;height:1px;
  background:var(--grid);
  transition:width var(--ease),background-color var(--ease);
}
.footer-list a:hover{color:var(--mint);}
.footer-list a:hover::before{width:14px;background:var(--mint);}

.footer-list-contact li{
  display:flex;flex-wrap:wrap;align-items:center;gap:6px 10px;
  padding:6px 0;
}
.footer-label{
  font-family:var(--font-mono);
  font-size:10px;letter-spacing:.16em;
  color:#7C90AC;
  min-width:30px;
}
.footer-value{
  font-family:var(--font-mono);
  font-size:13px;letter-spacing:.02em;
  color:var(--text);
  word-break:break-all;
}

.footer-baseline{
  position:relative;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:10px 26px;
  margin-top:clamp(28px,4vw,46px);
  padding:18px 0 26px;
  font-family:var(--font-mono);
  font-size:12px;letter-spacing:.05em;
  color:var(--muted);
}
.footer-baseline::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background-image:repeating-linear-gradient(90deg,var(--grid) 0 6px,transparent 6px 12px);
}
.footer-copy,.footer-icp,.footer-note{margin:0;}
.footer-note{color:#7C90AC;}
.footer-note .status-light{margin-right:8px;}

/* ---------- responsive ---------- */
@media (max-width:1239px){
  .nav-idx{display:none;}
  .brand-sub{display:none;}
  .nav-link{font-size:13.5px;padding:10px 7px 12px;}
  .nav-link::after{left:7px;right:7px;}
}

@media (max-width:1079px){
  .countdown-label{display:none;}
  .countdown{padding:6px 10px;font-size:11px;}
}

@media (max-width:959px){
  .nav-toggle{display:inline-flex;}
  .site-nav{
    position:absolute;left:0;right:0;top:100%;
    display:none;flex-direction:column;justify-content:flex-start;
    background:var(--panel);
    border-bottom:1px solid var(--grid);
    padding:10px var(--gutter) 20px;
    max-height:calc(100dvh - 84px);
    overflow-y:auto;
    box-shadow:0 26px 46px rgba(3,8,16,.6);
  }
  .site-nav[data-open]{display:flex;}
  .nav-list{flex-direction:column;align-items:stretch;gap:0;width:100%;}
  .nav-list > li{width:100%;}
  .nav-link{
    display:flex;width:100%;
    padding:14px 2px;
    font-size:15px;
    border-bottom:1px solid rgba(30,46,71,.85);
  }
  .nav-link::after{left:0;right:auto;bottom:0;width:100%;transform:scaleX(0);}
  .nav-link[aria-current="page"]::after{transform:scaleX(1);}
  .nav-idx{display:inline-block;}
  .header-inner{gap:10px;}
  .section-head{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;}
  .footer-col-brand{grid-column:1 / -1;}
  .footer-tagline{max-width:44ch;}
  .prose{max-width:none;}
}

@media (max-width:620px){
  .countdown{display:none;}
  .brand-name{font-size:18px;}
  .header-actions{gap:8px;}
  .header-cta{padding:8px 14px;font-size:12.5px;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-baseline{justify-content:flex-start;}
  .grid-12{grid-template-columns:repeat(4,minmax(0,1fr));}
}

@media (max-width:400px){
  .nav-toggle-text{display:none;}
  .header-cta{padding:8px 12px;}
}

@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;
  }
  .countdown-dot{opacity:1;}
  .card:hover{transform:none;}
  .btn:hover{transform:none;}
}