/* ============ 196赛场 / ARENA 196 · 共享样式 ============ */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,p,ul,ol,figure,blockquote,dl,dd{margin:0}
ul,ol{padding:0;list-style:none}
img,svg,video{display:block;max-width:100%}
button{font:inherit;color:inherit;background:none;border:0}
a{color:inherit}
table{border-collapse:collapse}

:root{
  --char:#0B0F0D;
  --forest:#0F2A22;
  --panel:#141A17;
  --white:#F2F7F1;
  --paper:#E9E2D0;
  --ink:#1A1511;
  --lime:#C8FF3D;
  --orange:#FF6B1A;
  --magenta:#FF3D8A;
  --muted:#8A9B92;
  --line:#2A3A33;

  --head-h:66px;
  --wrap:1240px;
  --gutter:clamp(16px,4vw,40px);
  --ease:cubic-bezier(.2,.7,.2,1);

  --font-display:"Archivo Narrow","Barlow Condensed","Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:"IBM Plex Mono","Roboto Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}

body{
  background:var(--char);
  color:var(--white);
  font-family:var(--font-body);
  font-size:clamp(16px,1.45vw,17.5px);
  font-weight:400;
  line-height:1.75;
  letter-spacing:.012em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

h1,h2,h3,h4,h5{
  font-family:var(--font-display);
  font-weight:800;
  line-height:1.12;
  letter-spacing:-.01em;
  text-wrap:balance;
}
h1{font-size:clamp(2.4rem,6vw,5rem)}
h2{font-size:clamp(1.6rem,3vw,2.6rem)}
h3{font-size:clamp(1.15rem,1.8vw,1.45rem)}

a{text-decoration-thickness:1px;text-underline-offset:3px}
p a,li a{color:var(--lime)}

:focus-visible{outline:2px solid var(--lime);outline-offset:3px}
.paper :focus-visible{outline-color:var(--orange)}

::selection{background:var(--lime);color:var(--char)}

/* ---------- 版式骨架 ---------- */
.wrap{
  width:min(calc(100% - var(--gutter) * 2),var(--wrap));
  margin-inline:auto;
}
.section{padding-block:clamp(44px,7vw,92px)}
.section--tight{padding-block:clamp(28px,4vw,52px)}
.section--forest{background:var(--forest)}
.paper{
  background:var(--paper);
  color:var(--ink);
}
.paper h1,.paper h2,.paper h3,.paper h4{color:var(--ink)}
.paper p a,.paper li a{color:#8a3b00}

.section__head{
  display:grid;
  gap:10px;
  max-width:74ch;
  margin-bottom:clamp(20px,3vw,38px);
}
.eyebrow{
  display:flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:500;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--orange);
}
.eyebrow::before{
  content:"";
  width:26px;
  height:1px;
  background:var(--orange);
  flex:none;
}
.section-title{font-size:clamp(1.6rem,3vw,2.6rem)}
.lede{
  max-width:64ch;
  color:var(--muted);
  font-size:clamp(15px,1.6vw,17px);
  line-height:1.8;
}
.paper .lede{color:#5b4a3c}

.stack{display:grid;gap:clamp(12px,1.6vw,20px)}
.rule{height:1px;border:0;background:var(--line);margin:0}

/* ---------- 网格 ---------- */
.grid{display:grid;gap:clamp(16px,2.4vw,28px)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--split{grid-template-columns:minmax(0,5fr) minmax(0,7fr)}

/* ---------- 正文容器 ---------- */
.prose{
  max-width:68ch;
  display:grid;
  gap:1.05em;
  line-height:1.85;
}
.prose h2{font-size:clamp(1.3rem,2.2vw,1.8rem);margin-top:1.1em}
.prose h3{font-size:clamp(1.05rem,1.6vw,1.2rem);margin-top:.9em}
.prose ul,.prose ol{display:grid;gap:.45em;padding-left:1.25em;list-style:revert}
.prose li::marker{color:var(--orange)}
.prose strong{font-weight:700;color:var(--lime)}
.paper .prose strong{color:var(--ink)}
.prose blockquote{
  border-left:2px solid var(--lime);
  padding-left:16px;
  color:var(--muted);
}
.paper .prose blockquote{border-color:var(--orange);color:#5b4a3c}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:44px;
  padding:0 18px;
  border:1px solid var(--lime);
  background:var(--lime);
  color:var(--char);
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:600;
  letter-spacing:.1em;
  text-transform:uppercase;
  text-decoration:none;
  cursor:pointer;
  transition:background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease);
}
.btn:hover{background:transparent;color:var(--lime)}
.btn:active{transform:translateY(1px)}
.btn--ghost{border-color:var(--line);background:transparent;color:var(--white)}
.btn--ghost:hover{border-color:var(--orange);color:var(--orange)}
.btn--sub{
  border-color:var(--magenta);
  background:var(--magenta);
  color:#fff;
  border-radius:999px;
}
.btn--sub:hover{
  background:transparent;
  color:var(--magenta);
  border-color:var(--magenta);
}
.btn--sm{min-height:36px;padding:0 12px;font-size:11px}

/* ---------- 面包屑 ---------- */
.crumb{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  text-transform:uppercase;
  color:var(--muted);
}
.crumb__list{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.crumb__item{display:inline-flex;align-items:center;gap:8px}
.crumb__item[aria-current="page"]{color:var(--white)}
.crumb__sep{color:var(--line)}
.crumb__link{color:var(--muted);text-decoration:none}
.crumb__link:hover{color:var(--lime);text-decoration:underline}

/* ---------- 卡片 / 标签 / 数字 ---------- */
.card{
  position:relative;
  display:grid;
  gap:10px;
  padding:clamp(16px,2vw,24px);
  background:var(--panel);
  border:1px solid var(--line);
  transition:border-color .18s var(--ease),background .18s var(--ease);
}
.card:hover{border-color:var(--lime)}
.card__label{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--orange);
}
.paper .card{background:#f4efe3;border-color:rgba(26,21,17,.18)}
.paper .card__label{color:#b34700}

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  min-height:24px;
  padding:0 8px;
  border:1px solid var(--line);
  background:rgba(242,247,241,.03);
  color:var(--muted);
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:500;
  letter-spacing:.12em;
  text-transform:uppercase;
}
.tag--live{border-color:var(--lime);color:var(--lime)}
.tag--alert{border-color:var(--magenta);color:var(--magenta)}
.paper .tag{background:rgba(26,21,17,.04);border-color:rgba(26,21,17,.22);color:#5b4a3c}

.num{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  letter-spacing:-.02em;
  line-height:1;
}
.num--xl{
  display:block;
  font-size:clamp(2.8rem,8vw,6rem);
  font-weight:600;
  color:var(--lime);
}

/* ---------- 图片容器基础规则 ---------- */
.frame{
  position:relative;
  overflow:hidden;
  background:var(--panel);
  border:1px solid var(--line);
  isolation:isolate;
}
.frame::after{
  content:"";
  position:absolute;
  inset:0;
  z-index:1;
  pointer-events:none;
  background-image:
    linear-gradient(to right,rgba(200,255,61,.09) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(200,255,61,.09) 1px,transparent 1px);
  background-size:56px 56px;
  opacity:.7;
}
.frame__img{
  width:100%;
  height:100%;
  object-fit:cover;
  display:block;
  filter:saturate(1.05) contrast(1.03);
}
.frame--wide{aspect-ratio:16/7}
.frame--hero{aspect-ratio:4/5}
.frame--card{aspect-ratio:16/9}
.frame--paper{background:#ded6c2;border-color:rgba(26,21,17,.2)}
.frame--paper::after{
  background-image:
    linear-gradient(to right,rgba(26,21,17,.08) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(26,21,17,.08) 1px,transparent 1px);
}
.frame__tag{
  position:absolute;
  left:12px;
  bottom:12px;
  z-index:2;
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 9px;
  background:var(--char);
  color:var(--lime);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  text-transform:uppercase;
}
.frame__caption{
  margin-top:8px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.06em;
  color:var(--muted);
}
.paper .frame__caption{color:#5b4a3c}

/* ============ 头部命令栏 ============ */
.site-head{
  position:sticky;
  top:0;
  z-index:80;
  background:var(--forest);
  border-bottom:1px solid var(--line);
}
.site-head__inner{
  display:grid;
  grid-template-columns:auto minmax(0,1fr) auto;
  align-items:center;
  gap:clamp(10px,2vw,28px);
  width:min(calc(100% - var(--gutter) * 2),var(--wrap));
  margin-inline:auto;
  min-height:var(--head-h);
}

.skip-link{
  position:absolute;
  left:var(--gutter);
  top:6px;
  z-index:120;
  padding:8px 14px;
  background:var(--lime);
  color:var(--char);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  text-decoration:none;
  transform:translateY(-160%);
  transition:transform .18s var(--ease);
}
.skip-link:focus-visible{transform:translateY(0)}

.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  min-height:44px;
  text-decoration:none;
  color:var(--white);
}
.brand__glyph{
  width:14px;
  height:14px;
  flex:none;
  background:linear-gradient(135deg,var(--lime) 0 56%,var(--orange) 56% 100%);
}
.brand__text{display:grid;line-height:1.06}
.brand__mark{
  font-family:var(--font-display);
  font-size:clamp(1rem,1.6vw,1.15rem);
  font-weight:800;
  letter-spacing:.02em;
}
.brand__sub{
  font-family:var(--font-mono);
  font-size:9.5px;
  font-weight:500;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--lime);
}
.brand:hover .brand__sub{color:var(--orange)}

.site-nav{display:flex;justify-content:center;min-width:0}
.site-nav__list{
  display:flex;
  flex-wrap:wrap;
  justify-content:center;
  gap:clamp(2px,1.2vw,18px);
}
.site-nav__item{display:block}
.site-nav__link{
  position:relative;
  display:inline-flex;
  align-items:baseline;
  gap:6px;
  min-height:44px;
  padding:0 2px;
  align-items:center;
  color:var(--white);
  font-size:13.5px;
  font-weight:500;
  text-decoration:none;
  white-space:nowrap;
  transition:color .16s var(--ease);
}
.site-nav__index{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.08em;
  color:var(--muted);
  transition:color .16s var(--ease);
}
.site-nav__link::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  bottom:10px;
  height:2px;
  background:var(--lime);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .18s var(--ease);
}
.site-nav__link:hover{color:var(--lime)}
.site-nav__link:hover .site-nav__index{color:var(--lime)}
.site-nav__link:hover::after{transform:scaleX(1)}
.site-nav__link[aria-current="page"]{color:var(--lime)}
.site-nav__link[aria-current="page"] .site-nav__index{color:var(--orange)}
.site-nav__link[aria-current="page"]::after{transform:scaleX(1);background:var(--orange)}

.nav-drawer{display:none}
.nav-drawer__meta{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  text-transform:uppercase;
  color:var(--muted);
}
.nav-drawer__cta{margin-top:14px;justify-self:start}

.head-actions{display:flex;align-items:center;gap:clamp(8px,1.4vw,16px)}
.head-status{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:10.5px;
  font-weight:500;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--muted);
  white-space:nowrap;
}
.head-status__dot{
  width:8px;
  height:8px;
  flex:none;
  border-radius:50%;
  background:var(--lime);
  box-shadow:0 0 0 3px rgba(200,255,61,.16);
  animation:head-pulse 2.4s ease-in-out infinite;
}
.head-cta{
  border-radius:999px;
  padding:0 16px;
  font-size:11px;
  min-height:38px;
}
@keyframes head-pulse{
  0%,100%{box-shadow:0 0 0 3px rgba(200,255,61,.16);opacity:1}
  50%{box-shadow:0 0 0 7px rgba(200,255,61,0);opacity:.72}
}

.nav-toggle{
  display:none;
  align-items:center;
  justify-content:center;
  width:44px;
  height:44px;
  border:1px solid var(--line);
  background:transparent;
  color:var(--white);
  cursor:pointer;
  transition:border-color .16s var(--ease),background .16s var(--ease);
}
.nav-toggle:hover{border-color:var(--lime)}
.nav-toggle__bars,
.nav-toggle__bars::before,
.nav-toggle__bars::after{
  display:block;
  width:18px;
  height:2px;
  background:currentColor;
  transition:transform .2s var(--ease),background .2s var(--ease),opacity .2s var(--ease);
}
.nav-toggle__bars{position:relative}
.nav-toggle__bars::before,
.nav-toggle__bars::after{
  content:"";
  position:absolute;
  left:0;
}
.nav-toggle__bars::before{top:-6px}
.nav-toggle__bars::after{top:6px}
.nav-toggle[aria-expanded="true"]{border-color:var(--lime);background:rgba(200,255,61,.1)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars{background:var(--lime)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before{transform:translateY(6px) rotate(45deg);background:var(--lime)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{transform:translateY(-6px) rotate(-45deg);background:var(--lime)}

.head-progress{
  position:absolute;
  left:0;
  right:0;
  bottom:-1px;
  height:2px;
  background:transparent;
  pointer-events:none;
}
.head-progress__bar{
  display:block;
  height:100%;
  width:0;
  background:var(--lime);
  box-shadow:0 0 10px rgba(200,255,61,.45);
  transition:width .12s linear;
}

/* ============ 页脚 ============ */
.site-foot{
  margin-top:clamp(48px,8vw,104px);
  background:var(--forest);
  border-top:1px solid var(--line);
  color:var(--white);
}
.foot-band{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:8px 20px;
  padding:10px var(--gutter);
  background:var(--char);
  border-bottom:1px solid var(--line);
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.16em;
  text-transform:uppercase;
}
.foot-band__label{color:var(--lime)}
.foot-band__meta{color:var(--muted)}

.site-foot__inner{
  width:min(calc(100% - var(--gutter) * 2),var(--wrap));
  margin-inline:auto;
  padding-block:clamp(34px,5vw,64px);
}
.foot-grid{
  display:grid;
  grid-template-columns:minmax(0,1.6fr) repeat(3,minmax(0,1fr));
  gap:clamp(24px,4vw,52px);
}
.foot-brand{display:grid;gap:14px;align-content:start}
.brand--foot{color:var(--white)}
.foot-brand__line{
  max-width:38ch;
  color:var(--muted);
  font-size:14px;
  line-height:1.75;
}
.foot-stats{
  display:flex;
  flex-wrap:wrap;
  gap:20px;
  margin-top:4px;
  padding-top:14px;
  border-top:1px solid var(--line);
}
.foot-stat{display:grid;gap:3px}
.foot-stat__num{
  font-family:var(--font-mono);
  font-size:1.4rem;
  font-weight:600;
  line-height:1;
  color:var(--lime);
}
.foot-stat__label{
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.08em;
  color:var(--muted);
}
.foot-col{display:grid;gap:12px;align-content:start}
.foot-col__title{
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:500;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--orange);
}
.foot-list{display:grid;gap:8px}
.foot-link{
  display:inline-block;
  padding:3px 0;
  color:var(--white);
  font-size:14.5px;
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color .16s var(--ease),border-color .16s var(--ease);
}
.foot-link:hover{color:var(--lime);border-bottom-color:var(--lime)}

.foot-meta{
  display:grid;
  gap:10px;
  margin-top:clamp(28px,4vw,46px);
  padding-top:20px;
  border-top:1px solid var(--line);
}
.foot-contact{font-size:13.5px;color:var(--muted)}
.foot-note{font-size:12.5px;color:var(--muted);line-height:1.7}
.foot-legal{
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  gap:8px 24px;
  padding-top:10px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.08em;
  text-transform:uppercase;
  color:var(--muted);
}
.foot-legal__item{display:inline-block}

/* ---------- 滚动显现 ---------- */
.has-reveal [data-reveal]{
  opacity:0;
  transform:translateY(12px);
  transition:opacity .24s var(--ease),transform .24s var(--ease);
  transition-delay:calc(var(--reveal-i,0) * 60ms);
}
.has-reveal [data-reveal].is-revealed{opacity:1;transform:none}

/* ============ 响应式 ============ */
@media (max-width:1080px){
  .head-status{display:none}
}
@media (max-width:980px){
  :root{--head-h:58px}
  html.is-nav-open{overflow:hidden}
  .site-head__inner{grid-template-columns:1fr auto;gap:10px}
  .nav-toggle{display:inline-flex}
  .site-head .brand{order:1}
  .head-actions{order:2}
  .site-nav{
    order:3;
    position:fixed;
    top:var(--head-h);
    left:0;
    right:0;
    display:flex;
    flex-direction:column;
    justify-content:flex-start;
    max-height:calc(100dvh - var(--head-h));
    overflow-y:auto;
    gap:0;
    padding:12px var(--gutter) 28px;
    background:var(--char);
    border-bottom:1px solid var(--line);
    box-shadow:0 24px 48px rgba(0,0,0,.45);
    opacity:0;
    visibility:hidden;
    pointer-events:none;
    transform:translateY(-10px);
    transition:opacity .2s var(--ease),transform .2s var(--ease),visibility .2s linear;
  }
  .site-nav[data-open]{
    opacity:1;
    visibility:visible;
    pointer-events:auto;
    transform:none;
  }
  .site-nav__list{flex-direction:column;gap:0;justify-content:flex-start;width:100%}
  .site-nav__item{width:100%}
  .site-nav__link{
    display:flex;
    width:100%;
    justify-content:space-between;
    align-items:center;
    min-height:52px;
    padding:0;
    font-size:15.5px;
    border-bottom:1px solid var(--line);
  }
  .site-nav__link::after{display:none}
  .site-nav__link[aria-current="page"]{
    padding-left:10px;
    border-left:2px solid var(--orange);
  }
  .site-nav__index{order:2;font-size:11px}
  .nav-drawer{
    display:grid;
    justify-items:start;
    gap:4px;
    padding-top:18px;
  }
  .nav-drawer__cta{width:100%;max-width:320px;justify-self:stretch;margin-top:12px}
  .head-cta{min-height:36px;padding:0 14px;font-size:10.5px}
  .grid--2,.grid--3,.grid--split{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .foot-brand{grid-column:1 / -1}
}
@media (max-width:640px){
  .head-cta{display:none}
  .foot-grid{grid-template-columns:1fr;gap:26px}
  .foot-legal{font-size:10.5px;letter-spacing:.06em}
  .foot-brand__line{max-width:none}
}
@media (max-width:400px){
  .brand__sub{letter-spacing:.16em}
}

/* ---------- 无障碍与动效偏好 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    transition-delay:0ms !important;
  }
  .has-reveal [data-reveal]{opacity:1 !important;transform:none !important}
  .head-status__dot{animation:none}
  .head-progress__bar{transition:none}
}

@media print{
  body{background:#fff;color:#000}
  .site-head,.head-progress,.nav-toggle,.skip-link{display:none}
  .site-foot{background:#fff;color:#000;border-top:1px solid #000}
  .foot-band{background:#fff;color:#000;border-bottom:1px solid #000}
  .foot-band__label,.foot-band__meta,.foot-contact,.foot-note,.foot-legal,.foot-brand__line,.foot-link,.foot-col__title{color:#000}
  .has-reveal [data-reveal]{opacity:1 !important;transform:none !important}
  .card{border:1px solid #000;background:#fff}
}