:root{
  --ink:#08251F;
  --char:#111514;
  --card:#152B25;
  --card-hi:#1C3A32;
  --signal:#17C964;
  --cyan:#25D9E8;
  --amber:#FFB020;
  --white:#F4F8F5;
  --mute:#9BB0A7;
  --line:#24463A;
  --deep:#04120F;
  --r-lg:26px;
  --r-md:16px;
  --r-pill:999px;
  --shell:1180px;
  --pad:clamp(16px,4vw,40px);
  --head-h:74px;
  --ease:cubic-bezier(.22,.68,.28,1);
  --font-display:"Barlow Condensed","Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-body:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:"JetBrains Mono","Roboto Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,p,figure,blockquote,dl,dd{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
img,svg,video{display:block;max-width:100%;height:auto}
button,input,select,textarea{font:inherit;color:inherit}
a{color:inherit}
hr{border:0}

body{
  min-height:100vh;
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.7;
  color:var(--white);
  background-color:var(--ink);
  background-image:
    radial-gradient(1100px 620px at 88% -8%, rgba(23,201,100,.10), transparent 62%),
    radial-gradient(820px 520px at -10% 22%, rgba(37,217,232,.06), transparent 60%);
  background-repeat:no-repeat;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}

:focus-visible{
  outline:2px solid var(--cyan);
  outline-offset:3px;
  border-radius:4px;
}

.shell{
  width:min(100% - (var(--pad) * 2), var(--shell));
  margin-inline:auto;
}

.skip-link{
  position:fixed;
  top:10px;
  left:12px;
  z-index:400;
  display:inline-block;
  padding:11px 18px;
  border-radius:var(--r-pill);
  background:var(--signal);
  color:var(--deep);
  font-weight:700;
  font-size:14px;
  text-decoration:none;
  transform:translateY(-180%);
  transition:transform .22s var(--ease);
}
.skip-link:focus,
.skip-link:focus-visible{transform:translateY(0)}

/* ============ export bar ============ */
.export-bar{
  background:var(--char);
  border-bottom:1px solid var(--line);
  color:var(--mute);
}
.export-bar__inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:10px 20px;
  min-height:40px;
  padding-block:6px;
  font-size:12.5px;
  letter-spacing:.02em;
}
.export-bar__label{
  display:flex;
  align-items:center;
  gap:9px;
  margin:0;
  min-width:0;
}
.export-bar__dot{
  flex:0 0 auto;
  width:7px;
  height:7px;
  border-radius:50%;
  background:var(--amber);
  box-shadow:0 0 0 4px rgba(255,176,32,.14);
  animation:breathe 3s ease-in-out infinite;
}
@keyframes breathe{
  0%,100%{box-shadow:0 0 0 4px rgba(255,176,32,.14)}
  50%{box-shadow:0 0 0 7px rgba(255,176,32,.05)}
}
.export-bar__cta{
  flex:0 0 auto;
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:5px 12px;
  border-radius:var(--r-pill);
  border:1px solid rgba(255,176,32,.42);
  background:rgba(255,176,32,.10);
  color:var(--amber);
  font-weight:700;
  font-size:12.5px;
  text-decoration:none;
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}
.export-bar__cta::after{content:"↗";font-size:11px}
.export-bar__cta:hover,
.export-bar__cta:focus-visible{
  background:var(--amber);
  border-color:var(--amber);
  color:#2A1B00;
}

/* ============ header ============ */
.site-head{
  position:sticky;
  top:0;
  z-index:200;
  background:rgba(8,37,31,.94);
  border-bottom:1px solid var(--line);
  backdrop-filter:saturate(160%) blur(14px);
  -webkit-backdrop-filter:saturate(160%) blur(14px);
}
.site-head::after{
  content:"";
  display:block;
  height:3px;
  background:linear-gradient(90deg,var(--signal) 0 38%,var(--cyan) 38% 66%,var(--amber) 66% 100%);
}
.site-head__inner{
  display:flex;
  align-items:center;
  gap:clamp(10px,1.8vw,26px);
  min-height:var(--head-h);
}

.brand{
  display:inline-flex;
  align-items:center;
  gap:12px;
  flex:0 0 auto;
  text-decoration:none;
  color:var(--white);
}
.brand__mark{
  display:grid;
  place-items:center;
  width:44px;
  height:44px;
  border-radius:14px;
  background:var(--signal);
  color:var(--deep);
  font-family:var(--font-mono);
  font-size:20px;
  font-weight:700;
  letter-spacing:-.05em;
  box-shadow:0 0 0 1px rgba(23,201,100,.35),0 12px 26px -16px rgba(23,201,100,.95);
  transition:transform .24s var(--ease);
}
.brand:hover .brand__mark{transform:rotate(-6deg) scale(1.04)}
.brand__text{display:block;min-width:0}
.brand__name{
  display:block;
  font-family:var(--font-display);
  font-size:19px;
  font-weight:800;
  line-height:1.12;
  letter-spacing:.05em;
}
.brand__sub{
  display:block;
  margin-top:3px;
  font-family:var(--font-mono);
  font-size:9.5px;
  font-weight:600;
  letter-spacing:.26em;
  color:var(--mute);
}

.squad-search{
  display:inline-flex;
  align-items:center;
  gap:8px;
  flex:0 1 auto;
  max-width:250px;
  padding:8px 15px;
  border-radius:var(--r-pill);
  border:1px dashed #2C5446;
  background:rgba(21,43,37,.62);
  color:var(--mute);
  font-size:13px;
  text-decoration:none;
  transition:border-color .2s var(--ease),color .2s var(--ease),background .2s var(--ease);
}
.squad-search__icon{color:var(--cyan);font-size:14px;line-height:1}
.squad-search__text{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.squad-search:hover,
.squad-search:focus-visible{
  border-color:var(--cyan);
  color:var(--white);
  background:rgba(37,217,232,.10);
}

.nav-toggle{
  display:none;
  align-items:center;
  gap:9px;
  margin-left:auto;
  padding:10px 15px;
  border-radius:var(--r-pill);
  border:1px solid var(--line);
  background:rgba(21,43,37,.85);
  color:var(--white);
  font-size:13.5px;
  font-weight:700;
  cursor:pointer;
}
.nav-toggle__bars{display:grid;gap:4px;width:18px}
.nav-toggle__bars span{
  display:block;
  height:2px;
  border-radius:2px;
  background:var(--signal);
  transition:transform .24s var(--ease),opacity .24s var(--ease);
}
.nav-toggle__label{line-height:1}
.site-head[data-open] .nav-toggle__bars span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.site-head[data-open] .nav-toggle__bars span:nth-child(2){opacity:0}
.site-head[data-open] .nav-toggle__bars span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

.site-nav{margin-left:auto}
.site-nav__list{
  display:flex;
  align-items:center;
  gap:2px;
}
.site-nav__item{flex:0 0 auto}
.site-nav__link{
  display:inline-block;
  padding:9px 13px;
  border-radius:var(--r-pill);
  color:var(--mute);
  font-size:14.5px;
  font-weight:500;
  text-decoration:none;
  white-space:nowrap;
  transition:color .2s var(--ease),background .2s var(--ease);
}
.site-nav__link:hover,
.site-nav__link:focus-visible{
  color:var(--white);
  background:rgba(23,201,100,.12);
}
.site-nav__link[aria-current="page"]{
  color:var(--deep);
  background:var(--signal);
  font-weight:700;
  box-shadow:0 10px 24px -16px rgba(23,201,100,.95);
}

/* ============ shared layout / typography ============ */
.site-main{display:block;min-height:40vh}
.section{padding-block:clamp(38px,6.5vw,92px)}
.section--tight{padding-block:clamp(24px,3.5vw,48px)}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:9px;
  font-family:var(--font-mono);
  font-size:11.5px;
  font-weight:600;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--cyan);
}
.eyebrow::before{
  content:"";
  width:22px;
  height:2px;
  border-radius:2px;
  background:var(--signal);
}

.section-title{
  font-family:var(--font-display);
  font-size:clamp(28px,4.4vw,52px);
  font-weight:800;
  line-height:1.08;
  letter-spacing:.01em;
  color:var(--white);
}

.prose{
  max-width:68ch;
  font-size:16.5px;
  line-height:1.78;
  color:#D6E2DB;
}
.prose > * + *{margin-top:1.05em}
.prose h2,.prose h3{
  font-family:var(--font-display);
  font-weight:800;
  color:var(--white);
  line-height:1.2;
}
.prose h2{font-size:clamp(21px,2.6vw,28px);margin-top:1.7em}
.prose h3{font-size:clamp(18px,2.1vw,22px);margin-top:1.4em}
.prose ul,.prose ol{padding-left:1.3em}
.prose ul{list-style:disc}
.prose ol{list-style:decimal}
.prose li{margin-top:.45em}
.prose li::marker{color:var(--signal)}
.prose strong{color:var(--white);font-weight:700}
.prose a{color:var(--cyan);text-underline-offset:3px}

.panel{
  background:linear-gradient(165deg,var(--card),#0C231D 78%);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  padding:clamp(18px,3vw,30px);
}

.grid{display:grid;gap:clamp(14px,2.4vw,26px)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}

/* ============ buttons ============ */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:13px 24px;
  border:1px solid transparent;
  border-radius:var(--r-pill);
  font-family:var(--font-body);
  font-size:15px;
  font-weight:700;
  line-height:1.2;
  text-decoration:none;
  cursor:pointer;
  transition:transform .2s var(--ease),background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.btn:hover{transform:translateY(-1px)}
.btn--primary{
  background:var(--signal);
  color:var(--deep);
  box-shadow:0 16px 34px -20px rgba(23,201,100,.95);
}
.btn--primary:hover{background:#25E072}
.btn--ghost{
  background:transparent;
  border-color:var(--line);
  color:var(--white);
}
.btn--ghost:hover{border-color:var(--cyan);color:var(--cyan)}
.btn--amber{
  background:var(--amber);
  color:#2A1B00;
  box-shadow:0 16px 34px -20px rgba(255,176,32,.9);
}
.btn--amber:hover{background:#FFC247}
.btn--sm{padding:9px 17px;font-size:13px}

/* ============ tags ============ */
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:5px 11px;
  border-radius:var(--r-pill);
  border:1px solid var(--line);
  background:rgba(21,43,37,.72);
  color:var(--mute);
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:600;
  letter-spacing:.1em;
  line-height:1.5;
  white-space:nowrap;
}
.tag--green{background:var(--signal);border-color:transparent;color:var(--deep)}
.tag--cyan{background:rgba(37,217,232,.12);border-color:rgba(37,217,232,.42);color:var(--cyan)}
.tag--amber{background:rgba(255,176,32,.12);border-color:rgba(255,176,32,.42);color:var(--amber)}

/* ============ figure ============ */
.figure{
  position:relative;
  margin:0;
  overflow:hidden;
  border-radius:var(--r-lg);
  border:1px solid var(--line);
  background:linear-gradient(150deg,var(--card),#0B221C 76%);
  aspect-ratio:16/10;
}
.figure--wide{aspect-ratio:21/9}
.figure--tall{aspect-ratio:4/5}
.figure > img{
  width:100%;
  height:100%;
  object-fit:cover;
  filter:saturate(108%) contrast(104%);
}
.figure__ph{
  display:grid;
  place-items:center;
  width:100%;
  height:100%;
  min-height:180px;
  padding:16px;
  text-align:center;
  color:rgba(155,176,167,.62);
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.2em;
  text-transform:uppercase;
  background-image:repeating-linear-gradient(135deg,rgba(36,70,58,.62) 0 1px,transparent 1px 14px);
}
.figure__badge{
  position:absolute;
  top:14px;
  left:14px;
  z-index:2;
  padding:6px 11px;
  border-radius:10px;
  border:1px solid rgba(37,217,232,.4);
  background:rgba(4,18,15,.82);
  color:var(--cyan);
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:700;
  letter-spacing:.08em;
  backdrop-filter:blur(6px);
  -webkit-backdrop-filter:blur(6px);
}
.figure__caption{
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  z-index:2;
  padding:34px 18px 16px;
  font-size:13px;
  line-height:1.6;
  color:var(--white);
  background:linear-gradient(transparent,rgba(4,18,15,.92));
}

/* ============ breadcrumbs ============ */
.breadcrumbs{padding-block:18px 0;font-size:12.5px;color:#7C948A}
.breadcrumbs__list{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.breadcrumbs__item{display:inline-flex;align-items:center;gap:8px}
.breadcrumbs__item + .breadcrumbs__item::before{content:"/";color:#3D6154}
.breadcrumbs__link{
  color:var(--mute);
  text-decoration:none;
  transition:color .2s var(--ease);
}
.breadcrumbs__link:hover,
.breadcrumbs__link:focus-visible{color:var(--cyan)}
.breadcrumbs__item[aria-current="page"]{color:var(--white);font-weight:600}

/* ============ chapter nav (page-level index) ============ */
.chapter-nav__list{display:grid;gap:3px}
.chapter-nav__link{
  display:flex;
  align-items:center;
  gap:10px;
  padding:9px 13px;
  border-radius:12px;
  border-left:2px solid transparent;
  color:var(--mute);
  font-size:14px;
  text-decoration:none;
  transition:color .2s var(--ease),background .2s var(--ease),border-color .2s var(--ease);
}
.chapter-nav__link:hover,
.chapter-nav__link:focus-visible{
  color:var(--white);
  background:rgba(37,217,232,.08);
}
.chapter-nav__link[aria-current="true"]{
  color:var(--cyan);
  border-left-color:var(--cyan);
  background:rgba(37,217,232,.10);
  font-weight:600;
}

/* ============ reveal ============ */
[data-reveal]{transition:opacity .6s var(--ease),transform .6s var(--ease)}
.js-ready [data-reveal]{opacity:0;transform:translateY(20px)}
.js-ready [data-reveal="shown"]{opacity:1;transform:none}

/* ============ to top ============ */
.to-top{
  position:fixed;
  right:clamp(14px,3vw,30px);
  bottom:clamp(14px,3vw,30px);
  z-index:300;
  display:inline-flex;
  align-items:center;
  gap:7px;
  padding:11px 17px;
  border:0;
  border-radius:var(--r-pill);
  background:var(--signal);
  color:var(--deep);
  font-family:var(--font-body);
  font-size:13px;
  font-weight:700;
  cursor:pointer;
  opacity:0;
  visibility:hidden;
  transform:translateY(12px);
  box-shadow:0 18px 38px -20px rgba(0,0,0,.95);
  transition:opacity .26s var(--ease),transform .26s var(--ease),visibility .26s var(--ease),background .2s var(--ease);
}
.to-top span{font-size:14px;line-height:1}
.to-top[data-visible]{
  opacity:1;
  visibility:visible;
  transform:none;
}
.to-top:hover{background:#25E072}

/* ============ footer ============ */
.site-foot{
  margin-top:clamp(48px,7vw,104px);
  background:var(--char);
  border-top:1px solid var(--line);
  color:var(--mute);
}
.site-foot__band{
  height:6px;
  background:linear-gradient(90deg,var(--signal) 0 40%,var(--cyan) 40% 68%,var(--amber) 68% 100%);
}
.site-foot__inner{
  display:grid;
  grid-template-columns:1.5fr .8fr .7fr 1.15fr;
  gap:clamp(20px,3.4vw,44px);
  padding-block:clamp(30px,4.6vw,60px) clamp(26px,3vw,38px);
}
.foot-brand__mark{
  display:grid;
  place-items:center;
  width:42px;
  height:42px;
  border-radius:13px;
  background:var(--signal);
  color:var(--deep);
  font-family:var(--font-mono);
  font-size:18px;
  font-weight:700;
  letter-spacing:-.05em;
}
.foot-brand__name{
  margin-top:15px;
  font-family:var(--font-display);
  font-size:22px;
  font-weight:800;
  letter-spacing:.05em;
  color:var(--white);
}
.foot-brand__desc{
  margin-top:9px;
  max-width:34ch;
  font-size:13.5px;
  line-height:1.8;
  color:#9FB3A9;
}
.foot-brand__tag{margin-top:15px}
.foot-col__title{
  margin-bottom:14px;
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:600;
  letter-spacing:.24em;
  color:var(--white);
}
.foot-col__list{display:grid;gap:9px;font-size:14px;line-height:1.6}
.foot-col__list--plain{color:#B9C9C1;font-size:13.5px}
.foot-col__note{
  margin-top:14px;
  font-size:12px;
  line-height:1.75;
  color:#6F857B;
}
.foot-link{
  color:var(--mute);
  text-decoration:none;
  transition:color .2s var(--ease),padding-left .2s var(--ease);
}
.foot-link:hover,
.foot-link:focus-visible{color:var(--signal)}
.site-foot__base{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:8px 24px;
  padding-block:16px 26px;
  border-top:1px solid var(--line);
  font-size:12.5px;
  color:#6F857B;
}
.site-foot__base-note{font-family:var(--font-mono);letter-spacing:.04em}

/* ============ responsive ============ */
@media (max-width:1080px){
  .site-nav__link{padding:9px 10px;font-size:13.5px}
  .squad-search{max-width:200px}
}

@media (max-width:920px){
  :root{--head-h:64px}
  .site-head__inner{gap:10px}
  .squad-search{display:none}
  .nav-toggle{display:inline-flex}
  .site-nav{
    position:absolute;
    left:0;
    right:0;
    top:100%;
    margin-left:0;
    display:none;
    padding:10px var(--pad) 20px;
    background:var(--char);
    border-bottom:1px solid var(--line);
    box-shadow:0 34px 50px -32px rgba(0,0,0,.95);
  }
  .site-head[data-open] .site-nav{
    display:block;
    animation:navdrop .22s var(--ease) both;
  }
  @keyframes navdrop{
    from{opacity:0;transform:translateY(-8px)}
    to{opacity:1;transform:none}
  }
  .site-nav__list{flex-direction:column;align-items:stretch;gap:3px}
  .site-nav__link{display:block;padding:13px 15px;border-radius:var(--r-md);font-size:15.5px}
  .site-nav__link[aria-current="page"]{border-radius:var(--r-md)}

  .export-bar__inner{font-size:11.5px}
  .export-bar__label{max-width:60%}
  .export-bar__label span:not(.export-bar__dot){overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

  .site-foot__inner{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px 24px}
  .foot-brand{grid-column:1 / -1}
}

@media (max-width:720px){
  .grid--2,.grid--3{grid-template-columns:1fr}
  .export-bar__label{max-width:52%}
  .brand__sub{display:none}
  .brand__mark{width:40px;height:40px;font-size:18px;border-radius:12px}
  .brand__name{font-size:17px}
  .to-top{padding:10px 14px;font-size:12px}
}

@media (max-width:540px){
  .site-foot__inner{grid-template-columns:1fr;gap:26px}
  .site-foot__base{flex-direction:column;align-items:flex-start}
  .figure,.figure--wide,.figure--tall{aspect-ratio:4/3}
  .export-bar__inner{min-height:36px}
  .export-bar__label{display:none}
  .export-bar__cta{margin-left:auto}
}

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