/* ============ 1. 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,ul,ol{margin:0}
ul,ol{padding:0;list-style:none}
img,svg,video,canvas{display:block;max-width:100%;height:auto}
button,input,select,textarea{font:inherit;color:inherit}
button{background:none;border:0;padding:0;cursor:pointer}
a{color:inherit;text-decoration:none}
hr{border:0}
table{border-collapse:collapse;width:100%}

/* ============ 2. TOKENS ============ */
:root{
  --ink-900:#05070D;
  --ink-800:#0E1220;
  --ink-700:#171B2E;
  --ink-600:#1F2438;
  --cyan:#22F5D0;
  --cyan-soft:#A9FFF2;
  --violet:#7A5CFF;
  --orange:#FF7A2F;
  --paper:#F4F6FA;
  --mist:#8C99AE;
  --teal-deep:#0B4A45;

  --line:rgba(140,153,174,.22);
  --line-strong:rgba(140,153,174,.45);
  --grid-line:rgba(140,153,174,.075);
  --paper-72:rgba(244,246,250,.72);
  --paper-56:rgba(244,246,250,.56);

  --font-display:"PingFang SC","Hiragino Sans GB","Source Han Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-body:"PingFang SC","Hiragino Sans GB","Source Han Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"JetBrains Mono","SFMono-Regular",Menlo,Consolas,"Liberation Mono","Courier New",monospace;

  --shell-w:1280px;
  --gutter:clamp(18px,4vw,48px);
  --step:clamp(56px,8vw,116px);

  --t-fast:120ms;
  --t-base:180ms;
  --t-slow:240ms;
  --t-reveal:380ms;
  --ease:cubic-bezier(.2,.7,.2,1);
}

/* ============ 3. BASE ============ */
html{background:var(--ink-900)}
body{
  background-color:var(--ink-900);
  background-image:
    linear-gradient(var(--grid-line) 1px,transparent 1px),
    linear-gradient(90deg,var(--grid-line) 1px,transparent 1px);
  background-size:72px 72px;
  color:var(--paper);
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.75;
  letter-spacing:.01em;
  overflow-x:hidden;
}
h1,h2,h3,h4,h5,h6{
  font-family:var(--font-display);
  font-weight:900;
  line-height:1.1;
  letter-spacing:-.02em;
  color:var(--paper);
}
p{color:var(--paper-72)}
::selection{background:var(--cyan);color:var(--ink-900)}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px}

/* ============ 4. LAYOUT ============ */
.shell{
  width:100%;
  max-width:var(--shell-w);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.shell--narrow{max-width:880px}
.section{position:relative;padding-block:var(--step)}
.section--tight{padding-block:clamp(28px,4vw,58px)}
.section-head{display:grid;gap:14px;margin-bottom:clamp(22px,3.2vw,44px)}
.grid-12{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:clamp(14px,1.6vw,26px)}
.grid-12>*{min-width:0}
.col-4{grid-column:span 4}
.col-5{grid-column:span 5}
.col-6{grid-column:span 6}
.col-7{grid-column:span 7}
.col-8{grid-column:span 8}
.col-12{grid-column:span 12}
.offset-1{grid-column-start:2}
.rule{height:1px;background:var(--line);margin-block:clamp(18px,2.4vw,34px)}
.visually-hidden{position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}

/* ============ 5. TYPE ============ */
.title-xl{font-size:clamp(38px,7vw,72px);letter-spacing:-.035em}
.title-lg{font-size:clamp(28px,4.4vw,48px);letter-spacing:-.03em}
.title-md{font-size:clamp(22px,2.6vw,32px)}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--font-mono);font-size:12px;font-weight:700;
  letter-spacing:.26em;text-transform:uppercase;color:var(--cyan);
}
.eyebrow::before{content:"";width:8px;height:8px;background:var(--cyan);flex:none}
.sec-index{
  font-family:var(--font-mono);font-size:12px;letter-spacing:.24em;
  color:var(--mist);text-transform:uppercase;
}
.lede{font-size:clamp(16px,1.5vw,19px);color:var(--paper-72);max-width:64ch}
.note{
  font-size:13px;line-height:1.8;color:var(--mist);
  border-left:2px solid var(--cyan);padding-left:14px;
}

/* ============ 6. BUTTONS ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 20px;
  font-family:var(--font-mono);font-size:13px;font-weight:700;
  letter-spacing:.12em;
  border:1px solid var(--line-strong);
  background:transparent;color:var(--paper);
  transition:border-color var(--t-base) var(--ease),color var(--t-base) var(--ease),
             background-color var(--t-base) var(--ease),transform var(--t-fast) var(--ease);
}
.btn:hover{border-color:var(--cyan);color:var(--cyan-soft)}
.btn:active{transform:translateY(1px)}
.btn--ghost{border-color:var(--line-strong);color:var(--paper)}
.btn--ghost:hover{border-color:var(--cyan);color:var(--cyan)}
.btn--solid{background:var(--cyan);border-color:var(--cyan);color:var(--ink-900)}
.btn--solid:hover{background:var(--cyan-soft);border-color:var(--cyan-soft);color:var(--ink-900)}
.btn--sm{padding:8px 14px;font-size:12px;letter-spacing:.1em}
.btn--block{width:100%}
.btn--cut{clip-path:polygon(0 0,100% 0,100% calc(100% - 9px),calc(100% - 9px) 100%,0 100%)}

/* ============ 7. TAGS / PANELS / METRICS ============ */
.tag{
  display:inline-block;padding:4px 10px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;
  border:1px solid var(--line-strong);color:var(--mist);
}
.tag--cyan{border-color:rgba(34,245,208,.55);color:var(--cyan)}
.tag--violet{border-color:rgba(122,92,255,.6);color:#B7A6FF}
.tag--orange{border-color:rgba(255,122,47,.6);color:var(--orange)}
.panel{
  position:relative;
  background:var(--ink-800);
  border:1px solid var(--line);
  padding:clamp(18px,2.4vw,32px);
  transition:border-color var(--t-base) var(--ease),background-color var(--t-base) var(--ease);
}
.panel:hover{border-color:rgba(34,245,208,.55)}
.panel--deep{background:var(--teal-deep);border-color:rgba(169,255,242,.22)}
.panel--edge{border-left:2px solid var(--cyan)}
.metric{display:grid;gap:6px}
.metric__value{
  display:block;
  font-family:var(--font-mono);font-weight:700;
  font-size:clamp(40px,6.4vw,96px);line-height:.95;letter-spacing:-.03em;
  color:var(--paper);
}
.metric__unit{
  font-family:var(--font-mono);font-size:.28em;font-weight:700;
  letter-spacing:.1em;color:var(--cyan);margin-left:.3em;
}
.metric__label{
  font-family:var(--font-mono);font-size:12px;letter-spacing:.2em;
  text-transform:uppercase;color:var(--mist);
}
.stat-row{display:grid;gap:clamp(14px,2vw,28px);grid-template-columns:repeat(auto-fit,minmax(160px,1fr))}

/* ============ 8. BREADCRUMB ============ */
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;
  color:var(--mist);
}
.breadcrumb li{display:inline-flex;align-items:center;gap:10px}
.breadcrumb li+li::before{content:"›";color:var(--line-strong)}
.breadcrumb a{color:var(--mist);transition:color var(--t-base) var(--ease)}
.breadcrumb a:hover{color:var(--cyan)}
.breadcrumb [aria-current="page"]{color:var(--paper)}

/* ============ 9. MEDIA FRAME ============ */
.media-frame{
  position:relative;width:100%;overflow:hidden;
  aspect-ratio:16/9;
  background:var(--ink-700);
  border:1px solid var(--line);
}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--tall{aspect-ratio:4/5}
.media-frame>img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.media-frame::after{
  content:"";position:absolute;left:0;top:0;width:34px;height:2px;
  background:linear-gradient(90deg,var(--cyan),transparent);
}
.media-frame__caption{
  position:absolute;left:0;right:0;bottom:0;
  padding:14px 16px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;
  color:var(--paper-72);
  background:linear-gradient(180deg,transparent,rgba(5,7,13,.88));
}

/* ============ 10. DATA RAIL ============ */
.rail{position:sticky;top:150px;display:grid;gap:16px;align-self:start}
.rail__title{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.24em;
  text-transform:uppercase;color:var(--mist);
}
.rail__list{display:grid;gap:2px}
.rail__link{
  display:grid;grid-template-columns:34px 1fr;align-items:center;
  padding:8px 0;
  font-size:13px;color:var(--paper-56);
  border-left:2px solid transparent;padding-left:10px;
  transition:color var(--t-base) var(--ease),border-color var(--t-base) var(--ease);
}
.rail__num{font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;color:var(--mist)}
.rail__link:hover{color:var(--paper)}
.rail__link[aria-current="true"]{color:var(--cyan);border-left-color:var(--cyan)}
.rail__link[aria-current="true"] .rail__num{color:var(--cyan)}

/* ============ 11. TABS / DRAWER ============ */
.tabs{display:flex;flex-wrap:wrap;gap:4px;border-bottom:1px solid var(--line)}
.tab{
  padding:10px 16px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.12em;
  color:var(--mist);border-bottom:2px solid transparent;
  transition:color var(--t-base) var(--ease),border-color var(--t-base) var(--ease);
}
.tab:hover{color:var(--paper)}
.tab[aria-selected="true"]{color:var(--cyan);border-bottom-color:var(--cyan)}
.tab-panel{padding-top:clamp(18px,2.4vw,32px)}
.tab-panel[hidden]{display:none}
.drawer{border:1px solid var(--line);background:var(--ink-800)}
.drawer+.drawer{margin-top:-1px}
.drawer__head{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  width:100%;padding:16px clamp(14px,2vw,24px);text-align:left;
  font-family:var(--font-display);font-weight:700;font-size:16px;color:var(--paper);
  transition:color var(--t-base) var(--ease);
}
.drawer__head::after{
  content:"+";font-family:var(--font-mono);font-size:16px;color:var(--cyan);
  transition:transform var(--t-base) var(--ease);
}
.drawer__head:hover{color:var(--cyan-soft)}
.drawer__head[aria-expanded="true"]::after{transform:rotate(45deg)}
.drawer__body{padding:0 clamp(14px,2vw,24px) 20px;color:var(--paper-72);font-size:15px}
.drawer__body[hidden]{display:none}

/* ============ 12. REVEAL ============ */
[data-reveal]{
  opacity:0;transform:translateY(16px);
  transition:opacity var(--t-reveal) var(--ease),transform var(--t-reveal) var(--ease);
}
[data-reveal].is-inview{opacity:1;transform:none}

/* ============ 13. HEADER ============ */
.skip-link{
  position:absolute;left:12px;top:-70px;z-index:200;
  padding:10px 16px;
  background:var(--cyan);color:var(--ink-900);
  font-family:var(--font-mono);font-size:13px;font-weight:700;letter-spacing:.1em;
  transition:top var(--t-base) var(--ease);
}
.skip-link:focus{top:12px}

.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(5,7,13,.94);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  color:var(--paper);
}
.progress-rail{
  position:absolute;left:0;right:0;top:0;height:2px;z-index:3;
  background:rgba(140,153,174,.16);
}
.progress-rail__bar{
  display:block;height:100%;width:0;
  background:linear-gradient(90deg,var(--cyan),var(--violet) 55%,var(--orange));
  transition:width 90ms linear;
}

.header-utility{
  border-bottom:1px solid var(--line);
  background:linear-gradient(90deg,rgba(122,92,255,.14),rgba(5,7,13,0) 44%,rgba(34,245,208,.12));
}
.header-utility__inner{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding-block:9px;
  font-size:12px;color:var(--mist);
}
.brand-line{
  font-family:var(--font-mono);font-size:12px;letter-spacing:.14em;
  color:var(--mist);white-space:nowrap;
}
.season-badge{
  display:inline-flex;align-items:center;gap:9px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.12em;
  color:var(--cyan-soft);white-space:nowrap;
}
.season-badge__dot{
  width:7px;height:7px;flex:none;background:var(--cyan);
  box-shadow:0 0 0 3px rgba(34,245,208,.16);
}
.header-locale{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;
  color:var(--mist);white-space:nowrap;
}
.locale-chip{padding:3px 9px;border:1px solid var(--line);color:var(--mist)}
.locale-chip.is-current{
  background:var(--cyan);border-color:var(--cyan);
  color:var(--ink-900);font-weight:700;
}
.locale-chip--mono{border-style:dashed;color:var(--paper-56)}

.masthead{padding-block:clamp(14px,2vw,26px) clamp(12px,1.6vw,18px)}
.masthead__inner{
  display:grid;
  grid-template-columns:1fr auto 1fr;
  grid-template-areas:
    "kicker brand actions"
    "nav nav nav";
  align-items:center;
  gap:12px 24px;
}
.masthead__kicker{
  grid-area:kicker;justify-self:start;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.28em;
  text-transform:uppercase;color:var(--mist);
}
.masthead__brand{
  grid-area:brand;justify-self:center;
  display:inline-flex;align-items:baseline;gap:.3em;
  font-family:var(--font-display);font-weight:900;
  font-size:clamp(30px,4.6vw,54px);
  letter-spacing:-.035em;line-height:1;color:var(--paper);
  transition:color var(--t-base) var(--ease);
}
.masthead__brand-cn{
  font-size:.4em;font-weight:700;letter-spacing:.34em;
  color:var(--cyan);padding-left:.1em;
}
.masthead__brand:hover .masthead__brand-cn{color:var(--cyan-soft)}
.masthead__actions{
  grid-area:actions;justify-self:end;
  display:flex;align-items:center;gap:10px;
}

.primary-nav{grid-area:nav;justify-self:center;width:100%}
.primary-nav__list{
  display:flex;flex-wrap:wrap;justify-content:center;
  gap:clamp(12px,2.2vw,34px);
}
.primary-nav__link{
  position:relative;display:inline-block;
  padding:8px 2px;
  font-size:15px;letter-spacing:.06em;color:var(--paper-72);
  transition:color var(--t-base) var(--ease);
}
.primary-nav__link::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;
  background:var(--cyan);transform:scaleX(0);transform-origin:left;
  transition:transform var(--t-base) var(--ease);
}
.primary-nav__link:hover{color:var(--paper)}
.primary-nav__link:hover::after{transform:scaleX(1)}
.primary-nav__link[aria-current="page"]{color:var(--paper)}
.primary-nav__link[aria-current="page"]::after{transform:scaleX(1)}
.primary-nav__foot{display:none}

.nav-toggle{
  grid-area:toggle;display:none;align-items:center;gap:10px;
  padding:8px 12px;
  border:1px solid var(--line-strong);color:var(--paper);
  font-family:var(--font-mono);font-size:12px;font-weight:700;letter-spacing:.16em;
  transition:border-color var(--t-base) var(--ease),color var(--t-base) var(--ease);
}
.nav-toggle:hover{border-color:var(--cyan);color:var(--cyan)}
.nav-toggle__bars{display:grid;gap:4px;width:18px}
.nav-toggle__bars i{display:block;height:1px;background:currentColor;transition:transform var(--t-base) var(--ease),opacity var(--t-fast) var(--ease)}
.nav-toggle[aria-expanded="true"]{border-color:var(--cyan);color:var(--cyan)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(1){transform:translateY(5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(3){transform:translateY(-5px) rotate(-45deg)}

.header-rule{position:relative;height:1px;background:var(--line);overflow:hidden}
.header-rule::after{
  content:"";position:absolute;left:0;top:0;height:1px;
  width:clamp(80px,16vw,240px);
  background:linear-gradient(90deg,var(--cyan),transparent);
}

/* compact scrolled state */
.site-header[data-compact="true"] .header-utility{display:none}
@media (min-width:900px){
  .site-header[data-compact="true"] .masthead{padding-block:10px 12px}
  .site-header[data-compact="true"] .masthead__inner{
    grid-template-columns:auto 1fr auto;
    grid-template-areas:"brand nav actions";
    gap:clamp(18px,3vw,42px);
  }
  .site-header[data-compact="true"] .masthead__kicker{display:none}
  .site-header[data-compact="true"] .masthead__brand{font-size:22px;justify-self:start}
  .site-header[data-compact="true"] .primary-nav{justify-self:center;width:auto}
  .site-header[data-compact="true"] .primary-nav__list{gap:clamp(12px,1.8vw,26px)}
  .site-header[data-compact="true"] .primary-nav__link{font-size:14px;padding:6px 2px}
}

/* ============ 14. FOOTER ============ */
.site-footer{
  position:relative;
  margin-top:var(--step);
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(23,27,46,.92),rgba(5,7,13,1) 62%);
  color:var(--paper);
}
.site-footer::before{
  content:"";position:absolute;left:0;top:-1px;height:2px;
  width:min(360px,42%);
  background:linear-gradient(90deg,var(--cyan),var(--violet),transparent);
}
.footer-grid{
  display:grid;
  grid-template-columns:minmax(240px,1fr) minmax(0,1.65fr);
  gap:clamp(28px,4vw,64px);
  padding-block:clamp(44px,6vw,84px) clamp(26px,3.6vw,46px);
}
.footer-brand__name{
  font-family:var(--font-display);font-weight:900;
  font-size:clamp(22px,2.4vw,28px);letter-spacing:-.02em;color:var(--paper);
}
.footer-brand__line{margin-top:12px;font-size:14px;line-height:1.7;color:var(--mist);max-width:28ch}
.footer-brand__stamp{
  margin-top:16px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.2em;
  color:var(--cyan);
}
.footer-index{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));
  gap:clamp(18px,2.4vw,32px);
}
.footer-index__title{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.2em;
  text-transform:uppercase;color:var(--paper);padding-bottom:10px;
  border-bottom:1px solid var(--line);
}
.footer-index__list{margin-top:12px;display:grid;gap:2px}
.footer-index__link{
  display:inline-block;padding:5px 0;font-size:14px;color:var(--paper-56);
  transition:color var(--t-base) var(--ease),padding-left var(--t-base) var(--ease);
}
.footer-index__link:hover{color:var(--cyan);padding-left:8px}
.footer-meta{
  display:grid;gap:10px;
  padding-block:clamp(18px,2.4vw,28px);
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;line-height:1.9;
}
.footer-meta__legal{color:var(--cyan)}
.footer-meta__contact{color:var(--paper-72)}
.footer-meta__note{color:var(--mist);max-width:88ch}
.footer-base{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:10px 20px;padding-block:clamp(16px,2vw,24px) clamp(28px,4vw,44px);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;color:var(--mist);
}
.footer-base__mark{color:var(--line-strong)}

/* ============ 15. RESPONSIVE ============ */
@media (max-width:1100px){
  .footer-grid{grid-template-columns:1fr}
}
@media (max-width:900px){
  body{background-size:48px 48px}
  .col-4,.col-5,.col-6,.col-7,.col-8{grid-column:span 12}
  .offset-1{grid-column-start:1}
  .rail{position:static;top:auto}
  .masthead__inner{
    grid-template-columns:1fr auto;
    grid-template-areas:
      "brand toggle"
      "nav nav";
    align-items:center;
    gap:0;
    padding-block:4px;
  }
  .masthead__kicker,.masthead__actions{display:none}
  .masthead__brand{justify-self:start;font-size:clamp(26px,7vw,34px)}
  .nav-toggle{display:inline-flex;justify-self:end}
  .primary-nav{display:none;justify-self:stretch;width:100%}
  .primary-nav[data-open]{display:block;animation:navReveal 200ms var(--ease) both}
  .primary-nav__list{
    counter-reset:navi;
    display:grid;gap:0;justify-content:stretch;
    padding-top:8px;
  }
  .primary-nav__link{
    display:flex;align-items:baseline;gap:14px;
    padding:14px 4px;font-size:18px;
    border-bottom:1px solid var(--line);
  }
  .primary-nav__link::before{
    content:counter(navi,decimal-leading-zero);
    counter-increment:navi;
    font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;
    color:var(--cyan);
  }
  .primary-nav__link::after{display:none}
  .primary-nav__foot{display:grid;gap:10px;padding:18px 0 8px}
  .footer-index{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@keyframes navReveal{from{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:none}}
@media (max-width:860px){
  .brand-line{display:none}
}
@media (max-width:640px){
  body{font-size:16px}
  .footer-index{grid-template-columns:1fr;gap:22px}
  .footer-base{justify-content:flex-start}
}
@media (max-width:560px){
  .header-locale{display:none}
}

/* ============ 16. MOTION / PRINT ============ */
@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]{opacity:1;transform:none}
  .progress-rail__bar{transition:none}
}
@media print{
  .site-header,.progress-rail,.nav-toggle{display:none}
  body{background:#fff;color:#000}
}