/* ===== 01 reset ===== */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body,h1,h2,h3,h4,p,figure,blockquote,dl,dd,ul,ol{margin:0}
ul,ol{padding:0;list-style:none}
img,svg{display:block;max-width:100%}
button,input,select,textarea{font:inherit;color:inherit}
a{color:var(--cy)}

/* ===== 02 tokens ===== */
:root{
  --ink:#0B2B26;
  --ink-2:#12433A;
  --char:#1C2320;
  --paper:#F2EFE6;
  --cy:#38F2C8;
  --cy-soft:#9BFBE0;
  --gold:#F5A524;
  --gold-d:#B8761A;
  --mist:#8FA39C;
  --line:#2F6B5E;
  --ink-text:#D9D5C9;
  --shadow-hard:0 6px 0 rgba(0,0,0,.35);
  --font-display:"Archivo Narrow","Barlow Condensed","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-mono:"JetBrains Mono","Roboto Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --font-body:system-ui,-apple-system,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --rail:88px;
  --hdr-h:76px;
  --ease:cubic-bezier(.22,.61,.36,1);
}

/* ===== 03 base ===== */
html:focus-within{scroll-behavior:smooth}
body{
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.75;
  color:var(--paper);
  background-color:var(--ink);
  background-image:
    radial-gradient(58% 40% at 84% -8%, rgba(56,242,200,.12), transparent 62%),
    radial-gradient(44% 34% at 2% 4%, rgba(245,165,36,.07), transparent 58%);
  background-repeat:no-repeat;
  background-attachment:fixed;
  padding-top:calc(var(--hdr-h) + 26px);
  min-height:100%;
}
h1,h2,h3,h4{font-family:var(--font-display);font-weight:800;line-height:1.08;letter-spacing:-.02em;text-wrap:balance}
h1{font-size:clamp(38px,7vw,86px)}
h2{font-size:clamp(28px,4vw,52px)}
h3{font-size:clamp(20px,2.4vw,30px)}
p{max-width:74ch}
strong{color:var(--cy-soft);font-weight:700}
a:hover{color:var(--cy-soft)}
:focus-visible{outline:3px solid var(--cy);outline-offset:3px;border-radius:4px}
.mono{font-family:var(--font-mono);font-size:.82rem;letter-spacing:.02em;color:var(--mist)}
.mono-unit{font-family:var(--font-mono);font-size:.72rem;color:var(--mist);margin-left:.15em}
.lead{font-size:1.06rem;color:var(--ink-text);max-width:66ch}

/* ===== 04 layout ===== */
.wrap{width:min(1240px,100% - 32px);margin-inline:auto}
.rail-offset{width:100%}
@media (min-width:1120px){
  .rail-offset{padding-left:calc(var(--rail) + 34px)}
}

/* ===== 05 skip link ===== */
.skip-link{
  position:fixed;top:10px;left:50%;z-index:200;
  transform:translate(-50%,-180%);
  background:var(--cy);color:#06231E;font-family:var(--font-display);font-weight:800;
  padding:.6em 1.1em;border-radius:999px;text-decoration:none;border:2px solid var(--char);
  transition:transform .2s var(--ease);
}
.skip-link:focus{transform:translate(-50%,0);color:#06231E}

/* ===== 06 buttons ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.5em;
  padding:.72em 1.15em;border:2px solid var(--char);border-radius:999px;
  background:var(--gold);color:#14211C;
  font-family:var(--font-display);font-weight:800;font-size:.95rem;letter-spacing:.01em;
  text-decoration:none;cursor:pointer;
  box-shadow:0 5px 0 rgba(0,0,0,.4);
  transition:transform .18s var(--ease),box-shadow .18s var(--ease),background-color .18s linear,color .18s linear;
}
.btn:hover{color:#14211C;transform:translateY(-2px);box-shadow:0 7px 0 rgba(0,0,0,.42)}
.btn:active{transform:translateY(3px);box-shadow:0 1px 0 rgba(0,0,0,.45)}
.btn--gold{background:var(--gold);border-color:var(--char);color:#14211C}
.btn--gold:hover{background:#FFB84A;color:#14211C}
.btn--cy{background:var(--cy);border-color:var(--char);color:#06231E}
.btn--cy:hover{background:var(--cy-soft);color:#06231E}
.btn--ghost{background:transparent;color:var(--cy-soft);border-color:var(--line);box-shadow:0 5px 0 rgba(0,0,0,.28)}
.btn--ghost:hover{background:rgba(56,242,200,.1);color:var(--cy);border-color:var(--cy)}

/* ===== 07 chips ===== */
.chip-row{display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.chip{
  appearance:none;
  display:inline-flex;align-items:center;gap:.45em;
  padding:.44em .92em;border:2px solid var(--line);border-radius:999px;
  background:rgba(18,67,58,.55);color:var(--mist);
  font-family:var(--font-mono);font-size:.8rem;line-height:1.2;
  text-decoration:none;cursor:pointer;
  transition:background-color .18s linear,color .18s linear,border-color .18s linear;
}
.chip:hover{color:var(--cy-soft);border-color:var(--cy);background:rgba(56,242,200,.1)}
.chip[aria-pressed="true"],.chip.is-active{background:var(--cy);border-color:var(--cy);color:#06231E;font-weight:700}

/* ===== 08 header ===== */
.site-header{
  position:fixed;top:12px;left:0;right:0;z-index:90;
  display:flex;justify-content:center;padding-inline:16px;
  pointer-events:none;
}
.hdr{
  pointer-events:auto;position:relative;
  width:min(1240px,100%);
  display:flex;align-items:center;gap:12px;
  padding:10px 14px;
  border:2px solid var(--line);border-radius:999px;
  background:rgba(11,43,38,.82);
  backdrop-filter:blur(14px) saturate(1.1);
  -webkit-backdrop-filter:blur(14px) saturate(1.1);
  box-shadow:0 12px 32px rgba(0,0,0,.45);
  transition:padding .22s var(--ease),background-color .22s linear,box-shadow .22s linear;
}
.site-header[data-compact] .hdr{
  padding:6px 12px;
  background:rgba(9,34,30,.95);
  box-shadow:0 10px 26px rgba(0,0,0,.55);
}
.hdr__brand{
  display:flex;align-items:center;gap:9px;
  text-decoration:none;color:var(--paper);flex:none;
}
.hdr__brand:hover{color:var(--paper)}
.hdr__mark{
  display:grid;place-items:center;width:38px;height:38px;flex:none;
  border-radius:12px;border:2px solid #06231E;
  background:linear-gradient(140deg,var(--cy),#1FA98C);
  color:#06231E;font-family:var(--font-display);font-weight:900;font-size:.8rem;letter-spacing:.02em;
  box-shadow:0 3px 0 rgba(0,0,0,.4);
}
.hdr__name{
  font-family:var(--font-display);font-weight:800;font-size:1.02rem;letter-spacing:-.01em;
  white-space:nowrap;
}
.hdr__ver{
  font-family:var(--font-mono);font-size:.7rem;font-weight:700;
  background:var(--gold);color:#2A1B02;
  padding:.16em .52em;border-radius:999px;line-height:1.4;
}
.hdr__nav{flex:1;display:flex;justify-content:center}
.hdr__list{display:flex;align-items:center;gap:2px}
.hdr__item{display:flex}
.hdr__link{
  display:inline-block;padding:.5em .78em;border-radius:999px;
  color:rgba(242,239,230,.76);text-decoration:none;
  font-family:var(--font-display);font-weight:700;font-size:.95rem;
  white-space:nowrap;
  transition:color .18s linear,background-color .18s linear,box-shadow .18s linear;
}
.hdr__link:hover{color:var(--cy-soft);background:rgba(56,242,200,.1)}
.hdr__link[aria-current="page"]{
  color:var(--cy);background:rgba(56,242,200,.13);
  box-shadow:inset 0 0 0 2px rgba(56,242,200,.42);
}
.hdr__end{display:flex;align-items:center;gap:8px;flex:none}
.hdr__fav{
  display:inline-flex;align-items:center;
  font-family:var(--font-mono);font-size:.78rem;
  color:var(--cy-soft);text-decoration:none;
  border:2px solid var(--line);border-radius:999px;
  padding:.4em .8em;
  transition:border-color .18s linear,color .18s linear,background-color .18s linear;
}
.hdr__fav::before{
  content:"";width:7px;height:7px;border-radius:50%;
  background:var(--gold);margin-right:.55em;
}
.hdr__fav:hover{border-color:var(--cy);color:var(--cy);background:rgba(56,242,200,.1)}
.hdr__cta{padding:.55em 1.05em;font-size:.88rem}
.hdr__toggle{
  display:none;align-items:center;gap:8px;flex:none;
  padding:.45em .82em;border:2px solid var(--line);border-radius:999px;
  background:rgba(56,242,200,.1);color:var(--paper);cursor:pointer;
  font-family:var(--font-display);font-weight:700;font-size:.86rem;
}
.hdr__toggle:hover{border-color:var(--cy);color:var(--cy-soft)}
.hdr__bars{display:inline-flex;flex-direction:column;gap:4px;width:18px}
.hdr__bars span{display:block;height:2px;border-radius:2px;background:var(--cy);transition:transform .18s var(--ease),opacity .18s linear}
.hdr__toggle[aria-expanded="true"] .hdr__bars span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.hdr__toggle[aria-expanded="true"] .hdr__bars span:nth-child(2){opacity:0}
.hdr__toggle[aria-expanded="true"] .hdr__bars span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
.hdr__toggle-label{white-space:nowrap}

/* ===== 09 index rail ===== */
.rail{
  position:fixed;left:14px;top:calc(var(--hdr-h) + 34px);bottom:22px;z-index:60;
  width:var(--rail);display:none;flex-direction:column;
  padding:10px 8px;border:2px solid var(--line);border-radius:18px;
  background:rgba(11,43,38,.8);
  backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
}
.rail__list{display:flex;flex-direction:column;gap:4px;overflow:auto;scrollbar-width:thin}
.rail__link{
  display:flex;flex-direction:column;gap:2px;
  padding:8px 7px;border-radius:12px;
  border-left:2px solid transparent;
  color:var(--mist);text-decoration:none;
  transition:color .18s linear,background-color .18s linear,border-color .18s linear;
}
.rail__link:hover{color:var(--cy-soft);background:rgba(56,242,200,.08)}
.rail__link[aria-current="true"]{
  color:var(--cy);background:rgba(56,242,200,.13);border-left-color:var(--cy);
}
.rail__num{font-family:var(--font-mono);font-size:.74rem;line-height:1.3}
.rail__label{font-family:var(--font-display);font-weight:700;font-size:.78rem;line-height:1.25}
@media (min-width:1120px){.rail{display:flex}}

/* docked rail for small screens */
@media (max-width:1119px){
  .rail--docked{
    display:flex;flex-direction:row;
    left:12px;right:12px;bottom:12px;top:auto;width:auto;height:auto;
    overflow-x:auto;padding:8px;border-radius:999px;
  }
  .rail--docked .rail__list{flex-direction:row;gap:6px}
  .rail--docked .rail__link{
    flex:none;flex-direction:row;align-items:center;gap:6px;
    border-left:0;border-bottom:2px solid transparent;border-radius:999px;
  }
  .rail--docked .rail__link[aria-current="true"]{border-left:0;border-bottom-color:var(--cy)}
}

/* ===== 10 status panel ===== */
.status{
  display:flex;flex-wrap:wrap;gap:10px 24px;align-items:center;
  padding:12px 16px;border:2px solid var(--line);border-radius:14px;
  background:var(--char);
  font-family:var(--font-mono);font-size:.8rem;line-height:1.5;
}
.status__key{color:var(--mist);margin-right:.6em}
.status__val{color:var(--cy-soft);font-weight:700}
.status__dot{
  display:inline-block;width:8px;height:8px;border-radius:50%;
  background:var(--cy);box-shadow:0 0 0 4px rgba(56,242,200,.16);
  margin-right:.7em;vertical-align:middle;
}

/* ===== 11 breadcrumbs ===== */
.crumbs{display:flex;flex-wrap:wrap;align-items:center;font-size:.84rem;color:var(--mist)}
.crumbs__item{display:flex;align-items:center}
.crumbs__item + .crumbs__item::before{content:"/";margin-inline:9px;color:var(--line)}
.crumbs a{color:var(--paper);text-decoration:none;border-bottom:1px solid var(--line)}
.crumbs a:hover{color:var(--cy);border-bottom-color:var(--cy)}
.crumbs [aria-current="page"]{color:var(--cy)}

/* ===== 12 sections ===== */
.sec{position:relative;padding-block:clamp(56px,8vw,104px)}
.sec--ink2{background:var(--ink-2)}
.sec--light{background:var(--paper);color:#16211D}
.sec--light .sec__lead,.sec--light .lead{color:#3B4741}
.sec--light .mono{color:#5C6B64}
.sec--light .sec__num{border-color:var(--gold-d);color:var(--gold-d)}
.sec__head{max-width:70ch}
.sec__num{
  display:inline-block;
  font-family:var(--font-mono);font-size:.82rem;font-weight:700;line-height:1.4;
  color:var(--cy);border:2px solid rgba(56,242,200,.5);border-radius:999px;
  padding:.2em .75em;
}
.sec__title{margin:.35em 0 .4em}
.sec__lead{max-width:64ch;color:var(--ink-text)}

/* ===== 13 grid ===== */
.grid{display:grid;gap:22px}
.grid--2{grid-template-columns:repeat(auto-fit,minmax(300px,1fr))}
.grid--3{grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}
.grid--4{grid-template-columns:repeat(auto-fit,minmax(190px,1fr))}

/* ===== 14 figures ===== */
.figure{
  margin:0;border:2px solid var(--line);background:var(--char);
  box-shadow:var(--shadow-hard);overflow:hidden;
}
.figure__box{
  position:relative;display:block;width:100%;overflow:hidden;
  background:linear-gradient(160deg,rgba(18,67,58,.92),rgba(28,35,32,.96));
}
.figure__box::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(180deg,rgba(11,43,38,.06),rgba(11,43,38,.14));
  mix-blend-mode:multiply;
}
.figure__img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.ratio-16x9{aspect-ratio:16/9}
.ratio-4x3{aspect-ratio:4/3}
.ratio-1x1{aspect-ratio:1/1}
.ratio-3x4{aspect-ratio:3/4}
.figure__cap{
  padding:10px 14px;border-top:1px solid rgba(47,107,94,.5);
  font-family:var(--font-mono);font-size:.8rem;color:var(--mist);
}
.sec--light .figure{border-color:#0B2B26;box-shadow:0 6px 0 rgba(11,43,38,.28)}
.sec--light .figure__cap{border-top-color:rgba(11,43,38,.25);color:#5C6B64}

/* ===== 15 data table ===== */
.dtable{width:100%;border-collapse:collapse;font-family:var(--font-mono);font-size:.9rem}
.dtable caption{text-align:left;padding-bottom:10px;color:var(--mist);font-size:.8rem}
.dtable th{
  padding:10px 12px;text-align:left;
  font-family:var(--font-body);font-size:.76rem;font-weight:700;letter-spacing:.08em;
  color:var(--mist);border-bottom:2px solid var(--line);
}
.dtable td{padding:12px;border-bottom:1px solid rgba(47,107,94,.4);color:var(--ink-text)}
.dtable .num{text-align:right;font-variant-numeric:tabular-nums}
.dtable tbody tr{transition:background-color .16s linear}
.dtable tbody tr:hover{background:rgba(56,242,200,.07)}
.dtable tbody tr:focus-within{background:rgba(56,242,200,.12);outline:2px solid var(--cy);outline-offset:-2px}
.dtable a{color:var(--cy-soft);text-decoration:none;border-bottom:1px solid var(--line)}
.dtable a:hover{color:var(--cy);border-bottom-color:var(--cy)}
.sec--light .dtable th{color:#5C6B64;border-bottom-color:#0B2B26}
.sec--light .dtable td{color:#16211D;border-bottom-color:rgba(11,43,38,.2)}
.sec--light .dtable tbody tr:hover{background:rgba(245,165,36,.13)}

/* ===== 16 expandable groups ===== */
.expand{
  border:2px solid var(--line);border-radius:14px;background:var(--char);
  overflow:hidden;
}
.expand + .expand{margin-top:10px}
.expand__btn{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:16px 18px;background:none;border:0;cursor:pointer;text-align:left;
  color:var(--paper);font-family:var(--font-display);font-weight:700;font-size:1.02rem;line-height:1.35;
}
.expand__btn:hover{color:var(--cy-soft)}
.expand__icon{
  position:relative;flex:none;width:22px;height:22px;
  border:2px solid var(--cy);border-radius:6px;
  transition:transform .18s var(--ease);
}
.expand__icon::before{content:"";position:absolute;left:4px;right:4px;top:50%;height:2px;background:var(--cy);transform:translateY(-50%)}
.expand__icon::after{content:"";position:absolute;top:4px;bottom:4px;left:50%;width:2px;background:var(--cy);transform:translateX(-50%);transition:transform .18s var(--ease)}
.expand__btn[aria-expanded="true"] .expand__icon{transform:rotate(180deg)}
.expand__btn[aria-expanded="true"] .expand__icon::after{transform:translateX(-50%) scaleY(0)}
.expand__panel{height:0;overflow:hidden;transition:height .24s var(--ease)}
.expand__body{padding:0 18px 18px;color:var(--ink-text);font-size:.98rem}
.expand__body p + p{margin-top:.8em}

/* ===== 17 reveal + progress ===== */
.reveal-ready [data-reveal]{
  opacity:0;transform:translateY(10px);
  transition:opacity .32s var(--ease),transform .32s var(--ease);
}
.reveal-ready [data-reveal].is-in{opacity:1;transform:none}
.scroll-progress{
  position:fixed;top:0;left:0;right:0;height:3px;z-index:120;
  pointer-events:none;background:transparent;
}
.scroll-progress__bar{
  display:block;height:100%;width:0;
  background:linear-gradient(90deg,var(--cy),var(--gold));
}

/* ===== 18 footer ===== */
.site-footer{
  position:relative;margin-top:48px;
  background:var(--ink-2);border-top:2px solid var(--line);
}
.site-footer::before{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.55;
  background-image:repeating-linear-gradient(90deg,rgba(56,242,200,.07) 0 1px,transparent 1px 96px);
}
.foot{position:relative;z-index:1;padding-block:clamp(44px,6vw,76px) 26px}
.foot__head{display:flex;flex-wrap:wrap;align-items:baseline;gap:8px 16px;padding-bottom:26px;border-bottom:2px solid rgba(47,107,94,.6)}
.foot__logo{
  font-family:var(--font-display);font-weight:900;font-size:clamp(22px,3vw,32px);
  letter-spacing:-.02em;color:var(--paper);text-decoration:none;
}
.foot__logo:hover{color:var(--cy)}
.foot__tag{font-family:var(--font-mono);font-size:.78rem;color:var(--mist)}
.foot__grid{display:grid;grid-template-columns:1.05fr 1fr 1.25fr;gap:32px;padding-block:34px}
.foot__title{
  font-size:1rem;font-weight:800;letter-spacing:.08em;color:var(--cy-soft);
  margin-bottom:14px;position:relative;padding-left:14px;
}
.foot__title::before{content:"";position:absolute;left:0;top:.42em;width:7px;height:7px;background:var(--gold)}
.foot__links{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:2px 18px}
.foot__links a{
  display:inline-block;padding:5px 0;
  color:rgba(242,239,230,.76);text-decoration:none;font-size:.94rem;
  border-bottom:1px solid transparent;
  transition:color .18s linear,border-color .18s linear;
}
.foot__links a:hover{color:var(--cy);border-bottom-color:var(--cy)}
.foot__text{font-size:.94rem;color:var(--ink-text);max-width:44ch}
.foot__meta{display:flex;flex-direction:column;gap:9px;font-size:.9rem;color:var(--ink-text)}
.foot__meta li{display:flex;flex-wrap:wrap;gap:10px;align-items:baseline}
.foot__meta-key{
  flex:none;min-width:5.2em;
  font-family:var(--font-mono);font-size:.74rem;color:var(--mist);
  border:1px solid var(--line);border-radius:999px;padding:.1em .55em;text-align:center;
}
.foot__legal{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px 24px;
  padding-top:22px;border-top:1px solid rgba(47,107,94,.6);
  color:var(--mist);font-size:.82rem;
}
.foot__copy{font-family:var(--font-mono);font-size:.8rem}
.foot__note{max-width:60ch}

/* ===== 19 responsive ===== */
@media (max-width:1159px){
  .hdr__fav{font-size:.74rem;padding:.35em .7em}
  .hdr__link{padding:.5em .62em;font-size:.9rem}
}
@media (max-width:1023px){
  .foot__grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px}
  .foot__col:last-child{grid-column:1 / -1}
}
@media (max-width:959px){
  :root{--hdr-h:66px}
  body{padding-top:calc(var(--hdr-h) + 34px);font-size:16px}
  .hdr{position:relative;align-items:center;gap:8px;padding:8px 10px}
  .hdr__nav{
    position:absolute;top:calc(100% + 12px);left:0;right:0;
    display:flex;flex-direction:column;
    padding:10px;border:2px solid var(--line);border-radius:22px;
    background:rgba(9,34,30,.97);
    backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
    box-shadow:0 18px 40px rgba(0,0,0,.5);
    opacity:0;visibility:hidden;transform:translateY(-10px);
    transition:opacity .22s var(--ease),transform .22s var(--ease),visibility .22s linear;
  }
  .hdr__nav[data-open]{opacity:1;visibility:visible;transform:none}
  .hdr__list{flex-direction:column;width:100%;gap:2px}
  .hdr__item{width:100%}
  .hdr__link{display:block;width:100%;padding:12px 14px;border-radius:14px;font-size:1rem}
  .hdr__end{margin-left:auto}
  .hdr__toggle{display:inline-flex}
}
@media (max-width:699px){
  .hdr__cta{display:none}
  .hdr__mark{width:34px;height:34px;font-size:.72rem}
  .hdr__name{font-size:.94rem}
  .foot__grid{grid-template-columns:1fr}
  .foot__links{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:420px){
  .hdr__name{display:none}
  .hdr__ver{font-size:.66rem}
}

/* ===== 20 reduced motion ===== */
@media (prefers-reduced-motion:reduce){
  html:focus-within{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .reveal-ready [data-reveal]{opacity:1;transform:none}
  .btn:hover{transform:none}
}