*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0}
img,svg,video{max-width:100%;display:block}
button,input{font:inherit;color:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p,figure{margin:0}
[hidden]{display:none!important}

:root{
  --ink:#070B14;
  --panel:#0E1B33;
  --line:#14294D;
  --paper:#F4EFE4;
  --paper-2:#E3D9C6;
  --signal:#B6FF3B;
  --signal-dim:#7ACC00;
  --alert:#FF5A36;
  --cyan:#4FD1FF;
  --muted:#A9B4C8;
  --ink-text:#0A1020;
  --paper-muted:#4A5268;

  --font-display:"Helvetica Neue","Arial Narrow","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-editorial:Georgia,"Times New Roman","Songti SC","SimSun",serif;
  --font-body:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;

  --shell:1240px;
  --shell-wide:1380px;
  --pad:clamp(16px,3.2vw,32px);
  --ease:cubic-bezier(.22,.61,.36,1);
}

body{
  background:var(--ink);
  color:var(--paper);
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4{font-family:var(--font-display);font-weight:800;line-height:1.06;letter-spacing:-.03em}
a{color:var(--signal);text-decoration:none}
a:hover{color:var(--signal-dim)}
:focus-visible{outline:2px solid var(--signal);outline-offset:2px}

.visually-hidden{position:absolute!important;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0 0 0 0);clip-path:inset(50%);white-space:nowrap;border:0}

.skip-link{position:absolute;left:12px;top:-72px;z-index:220;background:var(--signal);color:var(--ink);padding:10px 18px;font-weight:700;font-size:14px;letter-spacing:.04em;transition:top .18s var(--ease)}
.skip-link:focus{top:12px;color:var(--ink)}

/* ---------- layout ---------- */
.container{width:min(calc(100% - var(--pad) * 2),var(--shell));margin-inline:auto}
.container--wide{width:min(calc(100% - var(--pad) * 2),var(--shell-wide));margin-inline:auto}
.grid{display:grid;gap:clamp(16px,2.4vw,28px);grid-template-columns:repeat(12,minmax(0,1fr))}
.col-3{grid-column:span 3}
.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}

.section{padding:clamp(46px,6.6vw,96px) 0}
.section--tight{padding:clamp(28px,4vw,56px) 0}
.section--panel{background:var(--panel);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section--paper{background:var(--paper);color:var(--ink-text);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section__head{display:flex;align-items:baseline;justify-content:space-between;gap:16px 28px;flex-wrap:wrap;border-bottom:1px solid var(--line);padding-bottom:14px;margin-bottom:clamp(20px,3vw,38px)}
.section--paper .section__head{border-bottom-color:rgba(10,16,32,.18)}
.section__index{font-family:var(--font-mono);font-size:12px;letter-spacing:.22em;color:var(--signal)}
.section--paper .section__index{color:#3D4A16}
.section__title{font-size:clamp(1.55rem,3.4vw,2.6rem)}
.section__lead{font-family:var(--font-editorial);font-size:clamp(1rem,1.5vw,1.18rem);line-height:1.72;color:var(--muted);max-width:60ch}
.section--paper .section__lead{color:var(--paper-muted)}
.section--paper a:not(.btn){color:#3D5600}
.section--paper a:not(.btn):hover{color:#2F4300}

/* ---------- prose ---------- */
.prose{max-width:68ch;font-size:17px;line-height:1.78}
.prose>*+*{margin-top:1.05em}
.prose h2{font-size:clamp(1.28rem,2.3vw,1.75rem);margin-top:1.9em}
.prose h3{font-family:var(--font-editorial);font-weight:700;font-size:1.12rem;margin-top:1.6em;letter-spacing:0}
.prose ul{list-style:disc;padding-left:1.25em}
.prose ol{list-style:decimal;padding-left:1.4em}
.prose li+li{margin-top:.4em}
.prose a{border-bottom:1px solid var(--signal-dim)}
.prose blockquote{margin:1.6em 0;padding:2px 0 2px 18px;border-left:3px solid var(--signal);font-family:var(--font-editorial);color:var(--muted)}
.section--paper .prose blockquote{color:var(--paper-muted)}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:46px;padding:12px 20px;border:1px solid transparent;background:transparent;font-family:var(--font-display);font-weight:700;font-size:15px;letter-spacing:.03em;cursor:pointer;transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .12s var(--ease)}
.btn--signal{background:var(--signal);border-color:var(--signal);color:var(--ink)}
.btn--signal:hover{background:var(--signal-dim);border-color:var(--signal-dim);color:var(--ink)}
.btn--ghost{border-color:var(--line);color:var(--paper)}
.btn--ghost:hover{border-color:var(--signal);color:var(--signal)}
.btn--paper{background:var(--ink-text);border-color:var(--ink-text);color:var(--paper)}
.btn--paper:hover{background:var(--signal);border-color:var(--signal);color:var(--ink)}
.btn:active{transform:translateY(1px)}

/* ---------- breadcrumb ---------- */
.breadcrumb{padding-top:20px}
.breadcrumb__list{display:flex;flex-wrap:wrap;gap:4px 8px}
.breadcrumb__item{font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:var(--muted)}
.breadcrumb__item+.breadcrumb__item::before{content:"/";margin-right:8px;color:var(--line)}
.breadcrumb__item a{color:var(--muted)}
.breadcrumb__item a:hover{color:var(--signal)}

/* ---------- figure ---------- */
.figure{margin:0}
.figure__media{position:relative;width:100%;aspect-ratio:16/9;background:var(--panel);border:1px solid var(--line);overflow:hidden}
.figure__media::after{content:"";position:absolute;inset:0;pointer-events:none;background-image:linear-gradient(to right,rgba(182,255,59,.08) 1px,transparent 1px),linear-gradient(to bottom,rgba(182,255,59,.08) 1px,transparent 1px);background-size:46px 46px}
.figure__media img{width:100%;height:100%;object-fit:cover}
.figure__media--wide{aspect-ratio:21/9}
.figure__media--tall{aspect-ratio:4/5}
.figure__media--square{aspect-ratio:1/1}
.figure__caption{margin-top:10px;font-family:var(--font-mono);font-size:12px;line-height:1.6;letter-spacing:.03em;color:var(--muted)}
.figure--paper .figure__media{background:var(--paper-2);border-color:rgba(10,16,32,.16)}
.figure--paper .figure__caption{color:var(--paper-muted)}

/* ---------- stat / tag ---------- */
.stat{display:flex;flex-direction:column;gap:6px}
.stat__value{font-family:var(--font-mono);font-weight:700;font-size:clamp(1.8rem,4vw,2.9rem);line-height:1;letter-spacing:-.02em;color:var(--signal)}
.stat__label{font-family:var(--font-mono);font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted)}
.stat--alert .stat__value{color:var(--alert)}
.stat--cyan .stat__value{color:var(--cyan)}
.section--paper .stat__value{color:#2F3A12}
.section--paper .stat__label{color:var(--paper-muted)}

.tag{display:inline-flex;align-items:center;gap:6px;padding:4px 9px;font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;border:1px solid var(--line);background:rgba(20,41,77,.4);color:var(--muted)}
.tag--signal{background:var(--signal);border-color:var(--signal);color:var(--ink)}
.tag--alert{border-color:var(--alert);color:var(--alert);background:transparent}
.tag--paper{background:var(--paper-2);border-color:transparent;color:var(--ink-text)}

/* ---------- filter ---------- */
.filter-bar{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.filter-bar__label{font-family:var(--font-mono);font-size:11px;letter-spacing:.18em;text-transform:uppercase;color:var(--muted);margin-right:4px}
.filter-chip{min-height:42px;padding:8px 14px;border:1px solid var(--line);background:transparent;color:var(--muted);font-size:14px;cursor:pointer;transition:border-color .2s var(--ease),color .2s var(--ease),background .2s var(--ease)}
.filter-chip:hover{border-color:var(--signal-dim);color:var(--paper)}
.filter-chip[aria-pressed="true"]{background:var(--signal);border-color:var(--signal);color:var(--ink);font-weight:600}
.section--paper .filter-chip{border-color:rgba(10,16,32,.22);color:var(--paper-muted)}
.section--paper .filter-chip:hover{border-color:#3D5600;color:var(--ink-text)}
.section--paper .filter-chip[aria-pressed="true"]{background:var(--ink-text);border-color:var(--ink-text);color:var(--paper)}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:120;background:rgba(7,11,20,.94);border-bottom:1px solid var(--line);backdrop-filter:blur(10px)}
@supports not (backdrop-filter:blur(10px)){.site-header{background:var(--ink)}}
.header-rail{display:flex;align-items:center;gap:20px;width:min(calc(100% - var(--pad) * 2),var(--shell-wide));margin-inline:auto;min-height:78px;padding-block:12px}
.header-brand{display:flex;align-items:center;gap:18px;min-width:0;flex:1 1 auto}

.brand-mark{display:inline-flex;align-items:center;gap:12px;color:inherit}
.brand-mark:hover{color:inherit}
.brand-mark__glyph{display:inline-block;background:var(--signal);color:var(--ink);font-family:var(--font-display);font-weight:900;font-size:22px;line-height:1;letter-spacing:-.06em;padding:7px 10px}
.brand-mark__text{display:flex;flex-direction:column;line-height:1.2;min-width:0}
.brand-mark__name{font-family:var(--font-display);font-weight:800;font-size:16px;letter-spacing:.02em;color:var(--paper)}
.brand-mark__sub{font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;color:var(--muted);white-space:nowrap}

.season-switch{display:flex;align-items:center;gap:10px;padding-left:18px;border-left:1px solid var(--line)}
.season-switch__label{font-family:var(--font-mono);font-size:11px;letter-spacing:.2em;color:var(--muted)}
.season-switch__group{display:flex;gap:4px}
.season-chip{min-width:38px;min-height:32px;padding:5px 8px;font-family:var(--font-mono);font-size:12px;background:transparent;color:var(--muted);border:1px solid var(--line);cursor:pointer;transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease)}
.season-chip:hover{border-color:var(--signal-dim);color:var(--paper)}
.season-chip[aria-pressed="true"]{background:var(--signal);border-color:var(--signal);color:var(--ink);font-weight:700}

.site-nav{display:flex;align-items:center;gap:18px}
.site-nav__list{display:flex;align-items:center;gap:2px}
.site-nav__link{display:inline-block;padding:10px 12px;font-size:15px;color:var(--paper);border-bottom:2px solid transparent;transition:color .2s var(--ease),border-color .2s var(--ease)}
.site-nav__link:hover{color:var(--signal);border-bottom-color:var(--signal-dim)}
.site-nav__link[aria-current="page"]{color:var(--signal);border-bottom-color:var(--signal);font-weight:600}

.header-search{display:flex;align-items:stretch;border:1px solid var(--line);background:var(--panel)}
.header-search__input{width:174px;padding:9px 10px;background:transparent;border:0;color:var(--paper);font-size:14px}
.header-search__input:focus{outline:none}
.header-search__input::placeholder{color:var(--muted)}
.header-search:focus-within{border-color:var(--signal)}
.header-search__go{padding:0 12px;background:transparent;border:0;border-left:1px solid var(--line);color:var(--signal);font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;cursor:pointer}
.header-search__go:hover{background:var(--signal);color:var(--ink)}

.nav-toggle{display:none;align-items:center;gap:9px;min-height:46px;padding:10px 14px;background:transparent;border:1px solid var(--line);color:var(--paper);font-size:14px;letter-spacing:.1em;cursor:pointer}
.nav-toggle:hover{border-color:var(--signal);color:var(--signal)}
.nav-toggle__bars{position:relative;display:block;width:18px;height:2px;background:var(--signal)}
.nav-toggle__bars::before,.nav-toggle__bars::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--signal);transition:transform .22s var(--ease),opacity .22s var(--ease)}
.nav-toggle__bars::before{top:-6px}
.nav-toggle__bars::after{top:6px}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before{transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{transform:translateY(-6px) rotate(-45deg)}

.scroll-progress{position:absolute;left:0;bottom:-1px;height:2px;width:0;background:linear-gradient(90deg,var(--signal),var(--cyan));transition:width .1s linear}

/* ---------- footer ---------- */
.site-footer{position:relative;background:var(--panel);border-top:1px solid var(--line);color:var(--muted);font-size:14px;padding:clamp(40px,6vw,72px) 0 26px}
.footer-rail{width:min(calc(100% - var(--pad) * 2),var(--shell-wide));margin-inline:auto;display:grid;grid-template-columns:1.9fr 1fr 1fr 1.2fr;gap:36px 28px}
.footer-brand{display:flex;flex-direction:column;gap:14px;align-items:flex-start}
.footer-brand .brand-mark__name{color:var(--paper)}
.footer-note{max-width:34em;font-size:13px;line-height:1.72;color:var(--muted)}
.footer-meta{font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;color:var(--signal)}
.footer-cta{display:flex;flex-wrap:wrap;gap:10px;margin-top:4px}
.footer-col__title{margin-bottom:14px;font-family:var(--font-mono);font-size:11px;font-weight:600;letter-spacing:.2em;text-transform:uppercase;color:var(--signal)}
.footer-list__item+.footer-list__item{margin-top:8px}
.footer-list a{font-size:14px;color:var(--paper);border-bottom:1px solid transparent;transition:color .2s var(--ease),border-color .2s var(--ease)}
.footer-list a:hover{color:var(--signal);border-bottom-color:var(--signal-dim)}
.footer-value{font-family:var(--font-mono);font-size:13px;color:var(--paper);word-break:break-word}
.footer-list--plain .footer-list__item+.footer-list__item{margin-top:10px}
.footer-legal{width:min(calc(100% - var(--pad) * 2),var(--shell-wide));margin:40px auto 0;padding-top:20px;border-top:1px solid var(--line);display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px 24px}
.footer-legal__item{font-family:var(--font-mono);font-size:12px;color:var(--muted);letter-spacing:.04em}
.footer-legal__links{display:flex;flex-wrap:wrap;gap:8px 20px}
.footer-legal__links a{font-size:13px;color:var(--muted)}
.footer-legal__links a:hover{color:var(--signal)}

.back-top{position:fixed;right:16px;bottom:16px;z-index:55;display:grid;place-items:center;width:48px;height:48px;background:var(--signal);border:0;color:var(--ink);font-size:14px;cursor:pointer;opacity:0;visibility:hidden;transform:translateY(10px);transition:opacity .24s var(--ease),transform .24s var(--ease),visibility .24s linear}
.back-top.is-visible{opacity:1;visibility:visible;transform:none}
.back-top:hover{background:var(--signal-dim)}

/* ---------- reveal ---------- */
html.has-js [data-reveal]{opacity:0;transform:translateY(16px)}
html.has-js [data-reveal].is-in{opacity:1;transform:none;transition:opacity .34s var(--ease),transform .34s var(--ease)}

/* ---------- responsive ---------- */
@media (max-width:1120px){
  .header-search__input{width:120px}
  .site-nav__link{padding:10px 9px;font-size:14px}
}
@media (max-width:1024px){
  .nav-toggle{display:inline-flex}
  .header-rail{min-height:70px;gap:12px}
  .site-nav{position:fixed;left:0;right:0;bottom:0;z-index:130;display:block;max-height:80vh;overflow-y:auto;background:var(--panel);border-top:1px solid var(--signal-dim);padding:16px var(--pad) calc(20px + env(safe-area-inset-bottom));transform:translateY(104%);transition:transform .3s var(--ease);box-shadow:0 -18px 44px rgba(0,0,0,.5)}
  .site-nav[data-open]{transform:translateY(0)}
  .site-nav__list{flex-direction:column;gap:0;align-items:stretch}
  .site-nav__item+.site-nav__item{border-top:1px solid var(--line)}
  .site-nav__link{display:block;min-height:52px;padding:14px 4px;font-size:17px;border-bottom:0}
  .site-nav__link[aria-current="page"]{background:rgba(182,255,59,.08);padding-left:12px}
  .header-search{width:100%;margin-top:16px}
  .header-search__input{flex:1 1 auto;width:auto;padding:12px}
  .header-search__go{padding:0 16px}
  .footer-rail{grid-template-columns:1fr 1fr}
  .footer-brand{grid-column:1 / -1}
}
@media (max-width:900px){
  .col-3,.col-4,.col-5,.col-6,.col-7,.col-8{grid-column:1 / -1}
}
@media (max-width:640px){
  body{font-size:16px}
  .brand-mark__sub{display:none}
  .season-switch{padding-left:12px;gap:8px}
  .season-switch__label{display:none}
  .season-chip{min-width:34px}
  .footer-rail{grid-template-columns:1fr;gap:28px}
  .footer-legal{flex-direction:column;align-items:flex-start}
  .back-top{bottom:16px;right:12px}
}
@media (max-width:400px){
  .footer-cta .btn{width:100%}
}

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