*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,p,ul,ol,li,figure,blockquote,dl,dd{margin:0}
ul,ol{padding:0;list-style:none}
img,svg{display:block;max-width:100%}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
a{color:inherit;text-decoration:none}
table{border-collapse:collapse}

:root{
  --sc-night:#061410;
  --sc-turf:#0B211B;
  --sc-stand:#123029;
  --sc-blue:#0E2334;
  --sc-blue-soft:#17334A;
  --sc-line:#2C4A42;
  --sc-cyan:#4FE3C1;
  --sc-ember:#FF9E4D;
  --sc-text:#E6F2EE;
  --sc-muted:#94A8A1;
  --sc-chalk:#F3FBF8;
  --sc-font-display:"PingFang SC","Hiragino Sans GB","Source Han Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --sc-font-body:"PingFang SC","Hiragino Sans GB","Source Han Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --sc-font-mono:ui-monospace,"SFMono-Regular","Cascadia Mono",Consolas,"Liberation Mono",monospace;
  --sc-w:1280px;
  --sc-pad:clamp(16px,4vw,40px);
  --sc-line-w:1px;
  --sc-ease:cubic-bezier(.2,.7,.3,1);
  --sc-t:220ms;
}

html{scroll-padding-top:96px}
body{
  background-color:var(--sc-night);
  background-image:
    linear-gradient(to right,rgba(44,74,66,.16) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(44,74,66,.16) 1px,transparent 1px);
  background-size:72px 72px,72px 72px;
  background-attachment:fixed;
  color:var(--sc-text);
  font-family:var(--sc-font-body);
  font-size:17px;
  line-height:1.75;
  font-weight:400;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{font-family:var(--sc-font-display);font-weight:800;letter-spacing:-.02em;line-height:1.15;font-stretch:92%}
:focus-visible{outline:2px solid var(--sc-cyan);outline-offset:3px;border-radius:2px}
::selection{background:rgba(79,227,193,.28);color:var(--sc-chalk)}
#main-content{scroll-margin-top:96px}
[data-section]{scroll-margin-top:104px}

/* ---------- layout primitives ---------- */
.sc-container{width:min(var(--sc-w),100% - var(--sc-pad) * 2);margin-inline:auto}
.sc-section{padding-block:clamp(48px,7vw,104px);border-top:var(--sc-line-w) solid var(--sc-line)}
.sc-section:first-of-type{border-top:0}
.sc-section__head{display:flex;flex-wrap:wrap;align-items:baseline;gap:12px 20px;margin-bottom:clamp(20px,3vw,36px)}
.sc-eyebrow{font-family:var(--sc-font-mono);font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--sc-cyan);font-variant-numeric:tabular-nums}
.sc-title{font-size:clamp(28px,4.2vw,46px)}
.sc-title--lg{font-size:clamp(34px,6vw,68px);line-height:1.06}
.sc-lede{max-width:64ch;color:var(--sc-muted);font-size:clamp(16px,1.4vw,19px);line-height:1.8}
.sc-prose{max-width:70ch}
.sc-prose p{margin-bottom:1.2em}
.sc-prose p:last-child{margin-bottom:0}
.sc-meta{font-family:var(--sc-font-mono);font-size:12.5px;letter-spacing:.08em;color:var(--sc-muted);font-variant-numeric:tabular-nums}
.sc-rule{height:var(--sc-line-w);background:var(--sc-line);border:0;margin:0}

.sc-grid{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:clamp(16px,2.4vw,28px)}
.sc-col-4{grid-column:span 4}
.sc-col-6{grid-column:span 6}
.sc-col-8{grid-column:span 8}
.sc-col-12{grid-column:span 12}
.sc-offset-1{grid-column-start:2}

.sc-slab{position:relative;background:var(--sc-turf);border:var(--sc-line-w) solid var(--sc-line);padding:clamp(20px,3vw,36px)}
.sc-slab--blue{background:var(--sc-blue)}
.sc-slab--soft{background:var(--sc-blue-soft)}
.sc-slab--cut{clip-path:polygon(0 0,100% 0,100% calc(100% - 22px),0 100%)}

/* ---------- header ---------- */
.skip-link{position:absolute;left:16px;top:-60px;z-index:120;padding:10px 18px;background:var(--sc-cyan);color:var(--sc-night);font-size:14px;font-weight:700;border-radius:2px;transition:top var(--sc-t) var(--sc-ease)}
.skip-link:focus{top:12px}

.sc-header{position:sticky;top:0;z-index:100;background:rgba(6,20,16,.92);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:var(--sc-line-w) solid var(--sc-line)}
.sc-progress{position:absolute;left:0;right:0;bottom:-1px;height:2px;background:rgba(44,74,66,.45);pointer-events:none}
.sc-progress__bar{display:block;height:100%;width:100%;transform:scaleX(0);transform-origin:0 50%;background:linear-gradient(90deg,var(--sc-cyan) 0%,var(--sc-cyan) 72%,var(--sc-ember) 100%)}
.sc-header__inner{
  width:min(var(--sc-w),100% - var(--sc-pad) * 2);
  margin-inline:auto;
  display:flex;align-items:center;gap:clamp(10px,1.8vw,26px);
  min-height:76px;padding-block:10px;
}
.sc-brand{display:inline-flex;align-items:center;gap:12px;flex:0 0 auto}
.sc-brand__mark{display:grid;grid-template-columns:repeat(3,5px);align-items:end;gap:3px;height:22px}
.sc-brand__mark span{display:block;background:var(--sc-line)}
.sc-brand__mark span:nth-child(1){height:9px}
.sc-brand__mark span:nth-child(2){height:15px}
.sc-brand__mark span:nth-child(3){height:22px;background:var(--sc-cyan)}
.sc-brand__text{display:flex;flex-direction:column;line-height:1.2}
.sc-brand__name{font-family:var(--sc-font-display);font-weight:800;font-size:17px;letter-spacing:-.01em;color:var(--sc-chalk)}
.sc-brand__tag{font-size:11.5px;letter-spacing:.06em;color:var(--sc-muted)}

.sc-header__chapter{display:none;font-family:var(--sc-font-mono);font-size:12.5px;letter-spacing:.1em;color:var(--sc-cyan);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:22vw}

.sc-nav{margin-left:auto;background:rgba(18,48,41,.75);border:var(--sc-line-w) solid var(--sc-line);border-radius:999px;padding:5px;transition:padding var(--sc-t) var(--sc-ease)}
.sc-nav__list{display:flex;align-items:center;gap:2px}
.sc-nav__item{display:block}
.sc-nav__link{display:inline-block;padding:8px 14px;border-radius:999px;font-size:13.5px;letter-spacing:.01em;color:var(--sc-text);white-space:nowrap;transition:background var(--sc-t) var(--sc-ease),color var(--sc-t) var(--sc-ease)}
.sc-nav__link:hover{background:rgba(79,227,193,.14);color:var(--sc-chalk)}
.sc-nav__link[aria-current="page"]{background:var(--sc-cyan);color:var(--sc-night);font-weight:700}

.sc-status{display:inline-flex;flex-direction:column;align-items:flex-start;gap:2px;padding:7px 14px;border:var(--sc-line-w) solid var(--sc-line);border-radius:999px;background:var(--sc-blue);flex:0 0 auto}
.sc-status__label{font-family:var(--sc-font-mono);font-size:10.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--sc-muted)}
.sc-status__value{font-family:var(--sc-font-mono);font-size:13px;font-weight:700;color:var(--sc-ember);font-variant-numeric:tabular-nums;letter-spacing:.02em}

.sc-nav-toggle{display:none;align-items:center;gap:9px;padding:10px 16px;border:var(--sc-line-w) solid var(--sc-line);border-radius:999px;background:var(--sc-stand);color:var(--sc-text);font-size:13.5px;font-weight:600}
.sc-nav-toggle__bars{position:relative;display:block;width:16px;height:2px;background:var(--sc-cyan);border-radius:2px}
.sc-nav-toggle__bars::before,.sc-nav-toggle__bars::after{content:"";position:absolute;left:0;width:16px;height:2px;background:var(--sc-cyan);border-radius:2px;transition:transform var(--sc-t) var(--sc-ease),opacity var(--sc-t) var(--sc-ease)}
.sc-nav-toggle__bars::before{top:-5px}
.sc-nav-toggle__bars::after{top:5px}
.sc-nav-toggle__text{letter-spacing:.04em}
.sc-nav-toggle[aria-expanded="true"] .sc-nav-toggle__bars{background:transparent}
.sc-nav-toggle[aria-expanded="true"] .sc-nav-toggle__bars::before{transform:translateY(5px) rotate(45deg)}
.sc-nav-toggle[aria-expanded="true"] .sc-nav-toggle__bars::after{transform:translateY(-5px) rotate(-45deg)}

.sc-header[data-condensed] .sc-header__inner{min-height:60px}
.sc-header[data-condensed] .sc-brand__tag{display:none}
.sc-header[data-condensed] .sc-nav{padding:3px}
.sc-header[data-condensed] .sc-nav__link{padding:6px 11px;font-size:12.5px}
.sc-header[data-condensed] .sc-status{display:none}
.sc-header[data-condensed] .sc-header__chapter{display:block}

/* ---------- buttons ---------- */
.sc-btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 22px;border:var(--sc-line-w) solid transparent;border-radius:2px;font-family:var(--sc-font-display);font-size:14.5px;font-weight:700;letter-spacing:.02em;transition:background var(--sc-t) var(--sc-ease),color var(--sc-t) var(--sc-ease),border-color var(--sc-t) var(--sc-ease)}
.sc-btn--accent{background:var(--sc-cyan);color:var(--sc-night)}
.sc-btn--accent:hover{background:var(--sc-chalk)}
.sc-btn--ghost{border-color:var(--sc-line);color:var(--sc-text);background:transparent}
.sc-btn--ghost:hover{border-color:var(--sc-cyan);color:var(--sc-cyan)}

/* ---------- crumbs / notes / tags / numbers ---------- */
.sc-crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-family:var(--sc-font-mono);font-size:12px;letter-spacing:.08em;color:var(--sc-muted)}
.sc-crumbs__item{color:var(--sc-muted)}
.sc-crumbs__item a{color:var(--sc-muted)}
.sc-crumbs__item a:hover{color:var(--sc-cyan)}
.sc-crumbs__item[aria-current="page"]{color:var(--sc-text)}
.sc-crumbs__sep{color:var(--sc-line)}

.sc-note{border-left:2px solid var(--sc-cyan);padding:2px 0 2px 16px;color:var(--sc-muted);font-size:14.5px;line-height:1.72;max-width:58ch}
.sc-tag{display:inline-flex;align-items:center;gap:6px;padding:4px 10px;border:var(--sc-line-w) solid var(--sc-line);border-radius:2px;font-family:var(--sc-font-mono);font-size:11.5px;letter-spacing:.1em;text-transform:uppercase;color:var(--sc-muted)}
.sc-tag--live{border-color:rgba(79,227,193,.5);color:var(--sc-cyan)}
.sc-tag--soon{border-color:rgba(255,158,77,.5);color:var(--sc-ember)}
.sc-num{font-family:var(--sc-font-mono);font-weight:700;font-size:clamp(48px,9vw,120px);line-height:1;letter-spacing:-.03em;color:var(--sc-chalk);font-variant-numeric:tabular-nums}
.sc-num__unit{display:inline-block;margin-left:10px;font-size:12.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--sc-muted);vertical-align:baseline}

/* ---------- index catalog ---------- */
.sc-index{display:flex;flex-direction:column;border-top:var(--sc-line-w) solid var(--sc-line)}
.sc-index__item{border-bottom:var(--sc-line-w) solid var(--sc-line)}
.sc-index__link{display:grid;grid-template-columns:56px 1fr auto;align-items:center;gap:16px;padding:16px 4px;color:var(--sc-text);transition:color var(--sc-t) var(--sc-ease),padding var(--sc-t) var(--sc-ease)}
.sc-index__link:hover{color:var(--sc-cyan);padding-left:12px}
.sc-index__link.is-current{color:var(--sc-cyan)}
.sc-index__link.is-current .sc-index__num{color:var(--sc-cyan)}
.sc-index__num{font-family:var(--sc-font-mono);font-size:12.5px;letter-spacing:.12em;color:var(--sc-muted);font-variant-numeric:tabular-nums}
.sc-index__label{font-family:var(--sc-font-display);font-weight:700;font-size:clamp(16px,1.6vw,19px)}
.sc-index__item .sc-meta{justify-self:end}

/* ---------- figures ---------- */
.sc-figure{margin:0}
.sc-figure__media{position:relative;display:block;aspect-ratio:16/9;overflow:hidden;border:var(--sc-line-w) solid var(--sc-line);background:linear-gradient(150deg,var(--sc-blue-soft) 0%,var(--sc-turf) 62%,var(--sc-stand) 100%)}
.sc-figure__media--wide{aspect-ratio:21/9}
.sc-figure__media--tall{aspect-ratio:4/5}
.sc-figure__media img{width:100%;height:100%;object-fit:cover}
.sc-figure__media::after{content:"";position:absolute;inset:0;pointer-events:none;background:linear-gradient(180deg,rgba(6,20,16,0) 55%,rgba(6,20,16,.55) 100%)}
.sc-figure__caption{margin-top:10px;font-family:var(--sc-font-mono);font-size:12px;letter-spacing:.06em;color:var(--sc-muted)}
.sc-figure--tilt .sc-figure__media{clip-path:polygon(0 3%,100% 0,100% 97%,0 100%)}
.sc-figure--stack{margin-top:clamp(-56px,-4vw,0px);margin-left:clamp(0px,4vw,64px)}
.sc-grid .sc-figure__media{height:100%}

/* ---------- footer ---------- */
.sc-footer{position:relative;margin-top:clamp(48px,7vw,96px);background:linear-gradient(180deg,var(--sc-turf) 0%,var(--sc-night) 100%);border-top:var(--sc-line-w) solid var(--sc-line)}
.sc-footer::before{content:"";position:absolute;top:-1px;left:0;width:min(240px,40%);height:2px;background:var(--sc-cyan)}
.sc-footer__inner{width:min(var(--sc-w),100% - var(--sc-pad) * 2);margin-inline:auto;padding-block:clamp(40px,6vw,76px) 28px}
.sc-footer__grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.4fr;gap:clamp(24px,3.4vw,52px)}
.sc-footer__col{min-width:0}
.sc-footer__brand{font-family:var(--sc-font-display);font-weight:800;font-size:19px;letter-spacing:-.01em;color:var(--sc-chalk)}
.sc-footer__tag{margin-top:10px;max-width:34ch;color:var(--sc-muted);font-size:14px;line-height:1.72}
.sc-footer__title{font-family:var(--sc-font-mono);font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--sc-cyan);margin-bottom:14px}
.sc-footer__list{display:flex;flex-direction:column;gap:9px}
.sc-footer__link{font-size:14.5px;color:var(--sc-text);border-bottom:var(--sc-line-w) solid transparent;transition:color var(--sc-t) var(--sc-ease),border-color var(--sc-t) var(--sc-ease)}
.sc-footer__link:hover{color:var(--sc-cyan);border-bottom-color:var(--sc-cyan)}
.sc-footer__contact{color:var(--sc-muted);font-size:14px;line-height:1.7;gap:7px}
.sc-footer__contact li{word-break:break-word}
.sc-footer__note{margin-top:14px;font-size:13px;line-height:1.7;color:var(--sc-muted);max-width:38ch}
.sc-footer__cta{margin-top:18px}
.sc-footer__bottom{margin-top:clamp(32px,4vw,56px);padding-top:18px;border-top:var(--sc-line-w) solid var(--sc-line);display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;align-items:center}
.sc-footer__legal,.sc-footer__copy{font-family:var(--sc-font-mono);font-size:12px;letter-spacing:.08em;color:var(--sc-muted);font-variant-numeric:tabular-nums}

/* ---------- tablet ---------- */
@media (max-width:1120px){
  .sc-nav{position:absolute;left:var(--sc-pad);right:var(--sc-pad);top:calc(100% + 10px);margin-left:0;padding:10px;border-radius:16px;background:rgba(11,33,27,.98);box-shadow:0 24px 48px rgba(0,0,0,.45);display:none}
  .sc-nav__list{flex-direction:column;align-items:stretch;gap:4px}
  .sc-nav__link{display:block;padding:13px 16px;border-radius:10px;font-size:15px}
  .sc-header[data-open] .sc-nav{display:block}
  .sc-nav-toggle{display:inline-flex;margin-left:auto}
  .sc-status{display:none}
  .sc-header__chapter{display:none !important}
  .sc-header[data-condensed] .sc-brand__tag{display:block}
  .sc-header__inner{min-height:68px}
  .sc-footer__grid{grid-template-columns:1fr 1fr}
}
@media (max-width:760px){
  body{font-size:16px;background-size:48px 48px,48px 48px}
  .sc-grid{grid-template-columns:repeat(6,minmax(0,1fr))}
  .sc-col-4,.sc-col-6,.sc-col-8{grid-column:span 6}
  .sc-offset-1{grid-column-start:auto}
  .sc-index__link{grid-template-columns:44px 1fr;gap:12px}
  .sc-index__link .sc-meta{display:none}
  .sc-footer__grid{grid-template-columns:1fr;gap:32px}
  .sc-figure--stack{margin-top:16px;margin-left:0}
  .sc-num{font-size:clamp(42px,14vw,72px)}
}
@media (max-width:520px){
  .sc-header__inner{gap:10px}
  .sc-brand__tag{display:none}
  .sc-nav-toggle__text{display:none}
  .sc-nav-toggle{padding:11px 14px}
  .sc-footer__bottom{flex-direction:column;align-items:flex-start}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important}
}