/* ============================================================
   N体育空间 · 共享样式 /assets/site.css
   夜色球场 + 草原星空：靛蓝底色、堆叠画板、坐标索引
   ============================================================ */

/* ---------- 1. Tokens ---------- */
:root{
  --ink:#0B1220;
  --ink-2:#14161C;
  --dusk:#2A2F52;
  --cream:#F2E9DA;
  --lime:#B8FF3C;
  --lava:#FF5B2E;
  --silver:#9AA3AD;
  --cyan:#4FD1E0;
  --rust:#7A2A16;
  --text:#E8EAF0;

  --line:rgba(154,163,173,.22);
  --line-strong:rgba(154,163,173,.44);
  --rule:rgba(242,233,218,.10);

  --shell:1180px;
  --gutter:clamp(16px,4vw,40px);
  --panel-r:16px;
  --head-h:72px;

  --font-sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,"Liberation Mono",Courier,monospace;

  --ease:cubic-bezier(.22,.7,.24,1);
}

/* ---------- 2. Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--ink);
  color:var(--text);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.75;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img,svg,video{display:block;max-width:100%}
ul,ol{margin:0;padding:0;list-style:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
a{color:inherit;text-decoration:none}
table{border-collapse:collapse;width:100%}
[hidden]{display:none!important}

/* ---------- 3. 中文排版 ---------- */
h1,h2,h3,h4,h5{
  margin:0;
  font-weight:900;
  line-height:1.16;
  letter-spacing:-.02em;
  color:var(--cream);
}
h1{font-size:clamp(44px,7vw,96px);letter-spacing:-.03em}
h2{font-size:clamp(28px,3.4vw,40px)}
h3{font-size:clamp(20px,2.2vw,26px)}
h4{font-size:clamp(17px,1.8vw,20px)}
p{margin:0 0 1.15em}
p:last-child{margin-bottom:0}
strong{font-weight:800;color:var(--cream)}
small{font-size:13px;color:var(--silver)}
.eyebrow{
  display:inline-block;
  margin:0 0 12px;
  font-family:var(--font-mono);
  font-size:11.5px;
  font-weight:600;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--lime);
}
.lede{
  margin:14px 0 0;
  max-width:62ch;
  font-size:clamp(16px,1.6vw,18.5px);
  line-height:1.82;
  color:var(--silver);
}
.coord{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--silver);
}
.coord::before{content:"";width:24px;height:1px;background:var(--lava);flex:none}

/* ---------- 4. 焦点与可达性 ---------- */
:focus-visible{
  outline:2px solid var(--lime);
  outline-offset:3px;
  border-radius:6px;
}
.skip-link{
  position:fixed;
  top:-120px;
  left:16px;
  z-index:200;
  padding:10px 18px;
  border-radius:999px;
  background:var(--lime);
  color:var(--ink);
  font-size:14px;
  font-weight:800;
  transition:top .2s var(--ease);
}
.skip-link:focus{top:16px}

/* ---------- 5. 布局容器与网格 ---------- */
#main-content{display:block;padding-top:clamp(84px,11vh,108px);scroll-margin-top:96px}
.shell{width:100%;max-width:var(--shell);margin-inline:auto;padding-inline:var(--gutter)}
.grid{display:grid;gap:clamp(16px,2.4vw,28px)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--auto{grid-template-columns:repeat(auto-fit,minmax(min(280px,100%),1fr))}
@media (max-width:760px){
  .grid--2{grid-template-columns:minmax(0,1fr)}
}

/* ---------- 6. 堆叠面板 ---------- */
.panel{
  position:relative;
  padding:clamp(20px,3vw,34px);
  background:var(--ink-2);
  border:1px solid var(--line);
  border-radius:var(--panel-r);
}
.panel--cream{background:var(--cream);color:var(--ink-2);border-color:rgba(20,22,28,.14)}
.panel--cream h1,.panel--cream h2,.panel--cream h3,.panel--cream h4{color:var(--ink-2)}
.panel--cream .eyebrow{color:var(--rust)}
.panel--cream .lede,.panel--cream small{color:#4A4A52}
.panel--dusk{background:linear-gradient(150deg,var(--dusk) 0%,var(--ink-2) 78%)}
.panel--outline{background:transparent;border:1px dashed var(--line-strong)}
.panel--cut{border-radius:0;clip-path:polygon(0 0,100% 0,100% calc(100% - 28px),calc(100% - 28px) 100%,0 100%)}
.panel--tint{border-color:rgba(184,255,60,.34)}

/* 滚动章节高亮（由 JS 加 .is-active） */
[data-section]{
  transition:transform .55s var(--ease),border-color .55s ease,box-shadow .55s ease;
}
[data-section].is-active{
  transform:translateY(-5px);
  border-color:rgba(184,255,60,.5);
  box-shadow:0 34px 74px -56px rgba(184,255,60,.9);
}

/* ---------- 7. 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:44px;
  padding:11px 22px;
  border:1px solid var(--line-strong);
  border-radius:999px;
  background:rgba(242,233,218,.06);
  color:var(--cream);
  font-size:14px;
  font-weight:800;
  letter-spacing:.01em;
  transition:transform .18s var(--ease),background .2s ease,color .2s ease,border-color .2s ease;
}
.btn:hover{transform:translateY(-2px);background:rgba(242,233,218,.12)}
.btn--lava{background:var(--lava);border-color:var(--lava);color:#1A0803}
.btn--lava:hover{background:#FF7149;border-color:#FF7149}
.btn--lime{background:var(--lime);border-color:var(--lime);color:var(--ink)}
.btn--lime:hover{background:#CBFF70;border-color:#CBFF70}
.btn--ghost{background:transparent}
.btn--sm{min-height:38px;padding:8px 16px;font-size:13px}
.btn--block{width:100%}

/* ---------- 8. 面包屑 ---------- */
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  margin:0 0 18px;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--silver);
}
.breadcrumb a{color:var(--silver);transition:color .2s ease}
.breadcrumb a:hover{color:var(--lime)}
.breadcrumb__sep{color:rgba(154,163,173,.5)}
.breadcrumb [aria-current="page"]{color:var(--cream)}

/* ---------- 9. 正文区 ---------- */
.prose{max-width:68ch;font-size:17px;line-height:1.82;color:var(--text)}
.prose h2{font-size:clamp(24px,2.6vw,32px);margin:1.8em 0 .55em}
.prose h3{font-size:clamp(19px,2vw,23px);margin:1.5em 0 .5em}
.prose p{margin:0 0 1.15em}
.prose ul{display:grid;gap:9px;margin:0 0 1.2em}
.prose li{position:relative;padding-left:22px}
.prose li::before{content:"";position:absolute;left:0;top:.78em;width:11px;height:1px;background:var(--lava)}
.prose a{color:var(--lime);text-decoration:underline;text-underline-offset:3px}
.panel--cream .prose{color:#242730}
.panel--cream .prose a{color:var(--rust)}
.panel--cream .prose li::before{background:var(--rust)}

/* ---------- 10. 图片容器基础规则 ---------- */
.frame{
  position:relative;
  display:block;
  overflow:hidden;
  border:1px solid var(--line);
  border-radius:var(--panel-r);
  background:linear-gradient(140deg,var(--dusk),var(--ink-2));
}
.frame > img,.frame > picture > img{
  display:block;
  width:100%;
  height:100%;
  object-fit:cover;
  object-position:center;
  transition:transform .7s var(--ease);
}
.frame:hover > img{transform:scale(1.035)}
.frame--ratio-16x9{aspect-ratio:16/9}
.frame--ratio-4x3{aspect-ratio:4/3}
.frame--tall{aspect-ratio:3/4}
.frame--cut{
  border-radius:0;
  clip-path:polygon(0 0,100% 0,100% calc(100% - 30px),calc(100% - 30px) 100%,0 100%);
}
.frame--cut-l{
  border-radius:0;
  clip-path:polygon(30px 0,100% 0,100% 100%,0 100%,0 30px);
}
.frame--scan::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:linear-gradient(180deg,rgba(11,18,32,0) 42%,rgba(11,18,32,.78) 100%);
}
.frame__caption{
  position:absolute;
  left:16px;
  right:16px;
  bottom:14px;
  z-index:2;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.1em;
  color:var(--cream);
}

/* ============================================================
   11. 头部：悬浮胶囊 → 右下角常驻胶囊 + 索引抽屉
   ============================================================ */
.site-header{position:fixed;inset:0 0 auto;height:0;z-index:90}

.progress-rail{
  position:fixed;
  inset:0 0 auto;
  height:3px;
  z-index:95;
  pointer-events:none;
  background:rgba(154,163,173,.14);
}
.progress-bar{
  display:block;
  width:0;
  height:100%;
  background:linear-gradient(90deg,var(--lime),var(--cyan) 55%,var(--lava));
  transition:width .12s linear;
}

.header-capsule{
  position:fixed;
  top:18px;
  left:50%;
  z-index:92;
  width:min(var(--shell),calc(100% - 2 * var(--gutter)));
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  padding:9px 10px 9px 16px;
  border:1px solid var(--line);
  border-radius:999px;
  background:rgba(15,18,28,.84);
  box-shadow:0 20px 46px -30px rgba(0,0,0,.95);
  backdrop-filter:blur(16px) saturate(130%);
  transform:translateX(-50%);
  transition:background .25s ease,border-color .25s ease,padding .25s ease,box-shadow .25s ease;
}
[data-collapsed="true"] .header-capsule{
  top:auto;
  bottom:20px;
  left:auto;
  right:clamp(14px,4vw,32px);
  width:auto;
  transform:none;
  padding:8px 10px 8px 14px;
  border-color:rgba(184,255,60,.4);
  box-shadow:0 24px 50px -28px rgba(184,255,60,.5);
}
[data-collapsed="true"] .nav-capsule{display:none}
[data-collapsed="true"] .brand-text{display:none}
[data-collapsed="true"] .nav-toggle{display:inline-flex}

/* 品牌 */
.brand-mark{display:inline-flex;align-items:center;gap:11px;min-width:0}
.brand-coord{
  display:grid;
  place-items:center;
  flex:none;
  width:36px;
  height:36px;
  background:var(--lime);
  color:var(--ink);
  font-family:var(--font-mono);
  font-size:16px;
  font-weight:700;
  clip-path:polygon(0 0,100% 0,100% 70%,70% 100%,0 100%);
}
.brand-text{display:flex;flex-direction:column;line-height:1.14;min-width:0}
.brand-name{font-size:15px;font-weight:900;letter-spacing:.02em;color:var(--cream);white-space:nowrap}
.brand-sub{
  font-family:var(--font-mono);
  font-size:9.5px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--silver);
  white-space:nowrap;
}

/* 横向栏目 */
.nav-capsule{min-width:0}
.nav-list{display:flex;align-items:center;gap:2px}
.nav-link{
  display:inline-flex;
  align-items:center;
  height:40px;
  padding:0 13px;
  border-radius:999px;
  font-size:13px;
  font-weight:600;
  color:var(--silver);
  white-space:nowrap;
  transition:color .2s ease,background .2s ease;
}
.nav-link:hover{color:var(--cream);background:rgba(242,233,218,.08)}
.nav-link[aria-current="page"]{background:var(--lime);color:var(--ink);font-weight:800}

/* 栏目按钮 */
.nav-toggle{
  display:none;
  align-items:center;
  gap:9px;
  height:40px;
  padding:0 15px;
  border:1px solid var(--line-strong);
  border-radius:999px;
  color:var(--cream);
  font-size:13px;
  font-weight:800;
  letter-spacing:.04em;
  transition:background .2s ease,color .2s ease,border-color .2s ease;
}
.nav-toggle:hover{background:rgba(184,255,60,.12);border-color:rgba(184,255,60,.5)}
.nav-toggle[aria-expanded="true"]{background:var(--lime);color:var(--ink);border-color:var(--lime)}
.nav-toggle-bars{display:grid;gap:4px;width:16px}
.nav-toggle-bars i{display:block;height:2px;border-radius:2px;background:currentColor}
.nav-toggle-bars i:last-child{width:10px;margin-left:auto}

/* 遮罩 */
.drawer-scrim{
  position:fixed;
  inset:0;
  z-index:100;
  background:rgba(6,8,14,.68);
  opacity:0;
  visibility:hidden;
  pointer-events:none;
  transition:opacity .3s ease,visibility .3s ease;
}
.drawer-scrim[data-open="true"]{opacity:1;visibility:visible;pointer-events:auto}

/* 抽屉 */
.nav-drawer{
  position:fixed;
  top:0;
  right:0;
  bottom:0;
  z-index:101;
  width:min(420px,92vw);
  display:flex;
  flex-direction:column;
  padding:22px 22px calc(22px + env(safe-area-inset-bottom));
  overflow-y:auto;
  border-left:1px solid var(--line);
  background:linear-gradient(180deg,#12141D 0%,var(--ink) 46%,var(--ink) 100%);
  transform:translateX(102%);
  visibility:hidden;
  transition:transform .34s var(--ease),visibility .34s ease;
}
.nav-drawer[data-open="true"]{transform:none;visibility:visible}
body[data-nav-lock]{overflow:hidden}

.drawer-head{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  padding-bottom:14px;
  border-bottom:1px solid var(--line);
}
.drawer-coord{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--silver);
}
.drawer-close{
  display:inline-flex;
  align-items:center;
  height:40px;
  padding:0 18px;
  border-radius:999px;
  background:rgba(242,233,218,.08);
  color:var(--cream);
  font-size:13px;
  font-weight:800;
  transition:background .2s ease,color .2s ease;
}
.drawer-close:hover{background:var(--lava);color:#FFFFFF}

.drawer-nav{flex:1;margin-top:18px}
.drawer-list{display:grid;gap:4px}
.drawer-link{
  display:flex;
  align-items:center;
  gap:14px;
  min-height:52px;
  padding:10px 12px;
  border-left:2px solid transparent;
  border-radius:12px;
  color:var(--cream);
  font-size:17px;
  font-weight:800;
  transition:background .2s ease,border-color .2s ease,color .2s ease;
}
.drawer-link:hover{background:rgba(184,255,60,.08);border-left-color:var(--lime)}
.drawer-link[aria-current="page"]{background:rgba(184,255,60,.13);border-left-color:var(--lime);color:var(--lime)}
.drawer-idx{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.12em;
  color:var(--silver);
  flex:none;
}

.drawer-foot{
  margin-top:22px;
  padding:16px;
  border:1px dashed var(--line-strong);
  border-radius:16px;
  background:rgba(20,22,28,.7);
}
.drawer-note{
  margin:0 0 12px;
  font-size:13px;
  line-height:1.7;
  color:var(--silver);
}

/* ============================================================
   12. 页脚
   ============================================================ */
.site-footer{
  position:relative;
  margin-top:clamp(56px,9vw,112px);
  padding-bottom:88px;
  background:var(--ink-2);
  border-top:1px solid var(--line);
}

/* 归档带 */
.archive-band{
  border-bottom:1px solid var(--line);
  background:linear-gradient(90deg,rgba(42,47,82,.6) 0%,rgba(20,22,28,0) 72%);
}
.archive-track{
  display:flex;
  align-items:center;
  gap:10px;
  max-width:var(--shell);
  margin:0 auto;
  padding:14px var(--gutter);
  overflow-x:auto;
  cursor:grab;
  scrollbar-width:thin;
  scrollbar-color:rgba(154,163,173,.4) transparent;
  -webkit-overflow-scrolling:touch;
}
.archive-track::-webkit-scrollbar{height:6px}
.archive-track::-webkit-scrollbar-track{background:rgba(154,163,173,.1)}
.archive-track::-webkit-scrollbar-thumb{background:rgba(184,255,60,.45);border-radius:999px}
.archive-label{
  flex:none;
  padding-right:8px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--lava);
}
.archive-chip{
  flex:none;
  display:inline-flex;
  align-items:center;
  gap:8px;
  height:36px;
  padding:0 15px;
  border:1px solid var(--line);
  border-radius:999px;
  background:rgba(11,18,32,.72);
  color:var(--silver);
  font-size:13px;
  white-space:nowrap;
  transition:background .2s ease,color .2s ease,border-color .2s ease;
}
.archive-chip b{font-family:var(--font-mono);font-weight:600;font-size:11px;letter-spacing:.1em;opacity:.75}
.archive-chip:hover{background:var(--lime);border-color:var(--lime);color:var(--ink)}

/* 主体 */
.footer-zone{
  max-width:var(--shell);
  margin:0 auto;
  padding:clamp(34px,5.5vw,62px) var(--gutter) 26px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.45fr 1fr 1.15fr;
  gap:clamp(26px,4vw,52px);
}
.footer-brand{display:grid;gap:14px;align-content:start}
.footer-mark{display:flex;align-items:center;gap:12px}
.footer-logo{
  display:grid;
  place-items:center;
  flex:none;
  width:44px;
  height:44px;
  background:linear-gradient(135deg,var(--lime),var(--cyan));
  color:var(--ink);
  font-family:var(--font-mono);
  font-size:19px;
  font-weight:700;
  clip-path:polygon(0 0,100% 0,100% 70%,70% 100%,0 100%);
}
.footer-name{font-size:19px;font-weight:900;letter-spacing:-.01em;color:var(--cream)}
.footer-tagline{margin:0;max-width:36ch;font-size:14px;line-height:1.8;color:var(--silver)}

.footer-heading{
  margin:0 0 14px;
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:600;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--silver);
}
.footer-links{display:grid;gap:6px}
.footer-link{
  display:inline-flex;
  align-items:center;
  gap:10px;
  min-height:32px;
  font-size:14.5px;
  color:var(--text);
  transition:color .2s ease;
}
.footer-link::before{
  content:"";
  flex:none;
  width:12px;
  height:1px;
  background:var(--lava);
  transition:width .2s ease,background .2s ease;
}
.footer-link:hover{color:var(--lime)}
.footer-link:hover::before{width:22px;background:var(--lime)}

.footer-note{margin:0 0 14px;font-size:13.5px;line-height:1.75;color:var(--silver)}
.contact-line{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px;
  min-height:44px;
  padding:3px 0;
  font-size:14px;
}
.contact-key{
  flex:none;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--silver);
}
.contact-value{color:var(--cream);word-break:break-all}
.copy-btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:32px;
  padding:4px 13px;
  border:1px solid var(--line-strong);
  border-radius:999px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  color:var(--silver);
  transition:background .2s ease,color .2s ease,border-color .2s ease;
}
.copy-btn:hover{background:var(--cyan);border-color:var(--cyan);color:var(--ink)}
.copy-btn[data-copied="true"]{background:var(--lime);border-color:var(--lime);color:var(--ink)}

/* 法务条 */
.footer-legal{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:14px 26px;
  margin-top:clamp(26px,4vw,46px);
  padding-top:20px;
  border-top:1px solid var(--line);
  font-size:12.5px;
  color:var(--silver);
}
.icp{
  margin:0;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--silver);
}
.region-badge{
  display:inline-flex;
  align-items:center;
  gap:7px;
  margin:0;
  padding:4px 11px;
  border:1px solid var(--line);
  border-radius:999px;
  font-size:11px;
  letter-spacing:.1em;
  color:var(--silver);
}
.region-badge::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--cyan)}
.legal-list{display:flex;flex-wrap:wrap;align-items:center;gap:8px 20px}
.legal-link{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--silver);
  transition:color .2s ease;
}
.legal-link:hover{color:var(--lime)}
.copyright{margin:0;font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:var(--silver)}

/* ============================================================
   13. 响应式
   ============================================================ */
@media (max-width:1140px){
  .nav-link{padding:0 10px;font-size:12.5px}
}
@media (max-width:980px){
  .nav-capsule{display:none}
  .nav-toggle{display:inline-flex}
  .header-capsule{padding:8px 9px 8px 14px}
  .footer-grid{grid-template-columns:1fr 1fr}
  .site-footer{padding-bottom:96px}
}
@media (max-width:700px){
  :root{--gutter:16px}
  #main-content{padding-top:80px}
  .header-capsule{
    top:12px;
    width:calc(100% - 24px);
    padding:7px 8px 7px 12px;
  }
  [data-collapsed="true"] .header-capsule{right:12px;bottom:12px}
  .brand-coord{width:32px;height:32px;font-size:14px}
  .brand-name{font-size:14px}
  .nav-toggle{height:38px;padding:0 13px}
  .footer-legal{flex-direction:column;align-items:flex-start}
  .footer-zone{padding-bottom:18px}
}
@media (max-width:620px){
  .footer-grid{grid-template-columns:1fr}
  .panel{border-radius:14px}
}

/* ============================================================
   14. 动效降级
   ============================================================ */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms!important;
    animation-iteration-count:1!important;
    transition-duration:.001ms!important;
    scroll-behavior:auto!important;
  }
  [data-section].is-active{transform:none}
  .frame:hover > img{transform:none}
  .btn:hover{transform:none}
}