/* ==========================================================================
   互博中心 / HOOBALL — 共享层样式  /assets/site.css
   ========================================================================== */

/* 1. 变量与基调 ----------------------------------------------------------- */
:root{
  --c-indigo:#0E1330;
  --c-charcoal:#14161C;
  --c-steel:#2A3A6B;
  --c-paper:#F2F1EC;
  --c-paper-dim:#C9CCC4;
  --c-lime:#C6FF3D;
  --c-signal:#FF6A2B;
  --c-cyan:#35E0D0;
  --c-gray:#8A93A6;
  --c-arch:#E7DFC8;
  --c-ink:#0A1A16;

  --rail-w:15.5rem;
  --status-h:72px;
  --content-max:1480px;
  --measure:64ch;

  --shadow-hard:6px 6px 0 var(--c-ink);
  --shadow-soft:4px 4px 0 var(--c-ink);

  --dur:180ms;
  --ease:cubic-bezier(.2,.7,.3,1);

  --font-sans:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,"Courier New",monospace;
}

/* 2. Reset ---------------------------------------------------------------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
[hidden]{display:none !important}
body{
  margin:0;
  background:var(--c-indigo);
  color:var(--c-paper);
  font-family:var(--font-sans);
  font-size:17px;
  font-weight:400;
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
body.nav-open{overflow:hidden}
img,svg{max-width:100%;display:block}
h1,h2,h3,h4,p,figure,blockquote,dl,dd{margin:0}
ul,ol{margin:0;padding:0}
h1,h2,h3,h4{font-weight:900;line-height:1.15;letter-spacing:-.01em}
a{color:inherit}
button{font:inherit;color:inherit;background:none;border:0}
:focus-visible{outline:2px solid var(--c-signal);outline-offset:3px}
::selection{background:var(--c-lime);color:var(--c-ink)}

/* 3. 中文排版与通用文字 --------------------------------------------------- */
.display{
  font-size:clamp(2.5rem,7.5vw,6rem);
  font-weight:900;
  line-height:1.03;
  letter-spacing:-.02em;
  max-width:20ch;
}
.prose{
  max-width:var(--measure);
  font-size:1.0625rem;
  line-height:1.75;
  color:var(--c-paper-dim);
}
.prose--narrow{max-width:34ch}
.prose p+p{margin-top:1.1em}
.prose strong{color:var(--c-paper);font-weight:700}
.prose h2,.prose h3{margin:1.6em 0 .6em;color:var(--c-paper)}
.prose h2{font-size:1.5rem}
.prose h3{font-size:1.1875rem}
.prose ul,.prose ol{margin:.9em 0;padding-left:1.4em;list-style:square}
.prose a{color:var(--c-lime);text-decoration:none;border-bottom:1px solid rgba(198,255,61,.45)}
.prose a:hover{border-bottom-color:var(--c-lime)}
.mono{font-family:var(--font-mono);letter-spacing:.05em;font-feature-settings:"tnum" 1}
.eyebrow{
  font-family:var(--font-mono);
  font-size:.6875rem;
  letter-spacing:.24em;
  text-transform:uppercase;
  color:var(--c-gray);
}
.eyebrow--lime{color:var(--c-lime)}
.rule{border:0;border-top:2px solid var(--c-steel);margin-block:clamp(1.5rem,4vw,3rem)}

/* 4. 布局容器与网格 ------------------------------------------------------- */
.wrap{
  width:100%;
  max-width:var(--content-max);
  margin-inline:auto;
  padding-inline:clamp(1.1rem,3.5vw,3rem);
}
.wrap--tight{max-width:1080px}
.section{padding-block:clamp(3rem,7vw,6rem)}
.grid{
  display:grid;
  grid-template-columns:repeat(12,minmax(0,1fr));
  gap:clamp(1.25rem,3vw,2.5rem);
}
.span-4{grid-column:span 4}
.span-5{grid-column:span 5}
.span-6{grid-column:span 6}
.span-7{grid-column:span 7}
.span-8{grid-column:span 8}
.span-12{grid-column:span 12}
@media (max-width:960px){
  .span-4,.span-5,.span-6,.span-7,.span-8{grid-column:span 12}
}

/* 5. 编号章节头 ----------------------------------------------------------- */
.section-head{
  display:grid;
  grid-template-columns:auto minmax(0,1fr);
  gap:clamp(.75rem,2vw,1.5rem);
  align-items:start;
  border-top:2px solid var(--c-steel);
  padding-top:1.25rem;
  margin-bottom:clamp(1.75rem,4vw,3rem);
}
.section-head__index{
  font-family:var(--font-mono);
  font-size:.75rem;
  letter-spacing:.22em;
  color:var(--c-lime);
  padding-top:.4rem;
}
.section-head__title{
  font-size:clamp(1.5rem,3.4vw,2.5rem);
  font-weight:900;
  line-height:1.15;
}
.section-head__note{
  margin-top:.6rem;
  max-width:46ch;
  color:var(--c-gray);
  font-size:.9375rem;
}

/* 6. 卡片、标签 ----------------------------------------------------------- */
.card{
  position:relative;
  background:var(--c-charcoal);
  border:2px solid var(--c-steel);
  padding:clamp(1.1rem,2.4vw,1.75rem);
  transition:border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease),transform var(--dur) var(--ease);
}
.card:hover{
  border-color:var(--c-lime);
  box-shadow:var(--shadow-soft);
  transform:translate(-2px,-2px);
}
.card__head{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:baseline;gap:.5rem 1rem}
.card__title{font-size:1.125rem;font-weight:700;line-height:1.35}
.card__meta{font-family:var(--font-mono);font-size:.75rem;letter-spacing:.12em;color:var(--c-gray)}
.card__body{margin-top:.85rem;font-size:.9375rem;line-height:1.7;color:var(--c-paper-dim)}
.card--flag{border-color:var(--c-lime)}
.card--signal{border-left:6px solid var(--c-signal)}
.card--paper{background:var(--c-arch);color:var(--c-ink);border-color:var(--c-ink)}
.card--paper .card__title{color:var(--c-ink)}
.card--paper .card__meta{color:#5A5C52}
.card--paper .card__body{color:#2A2C26}

.tag{
  display:inline-flex;
  align-items:center;
  gap:.35rem;
  font-family:var(--font-mono);
  font-size:.6875rem;
  letter-spacing:.16em;
  text-transform:uppercase;
  padding:.3rem .55rem;
  border:1px solid var(--c-steel);
  color:var(--c-gray);
  text-decoration:none;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease),background-color var(--dur) var(--ease);
}
.tag--lime{border-color:var(--c-lime);color:var(--c-lime)}
.tag--signal{border-color:var(--c-signal);color:var(--c-signal)}
.tag--solid{background:var(--c-lime);border-color:var(--c-lime);color:var(--c-ink)}

/* 7. 按钮 ----------------------------------------------------------------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.5rem;
  padding:.65rem 1.15rem;
  border:2px solid var(--c-steel);
  background:transparent;
  color:var(--c-paper);
  font-size:.875rem;
  font-weight:700;
  letter-spacing:.06em;
  line-height:1;
  text-decoration:none;
  cursor:pointer;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease),background-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease),transform var(--dur) var(--ease);
}
.btn:hover{
  border-color:var(--c-lime);
  color:var(--c-lime);
  box-shadow:var(--shadow-soft);
  transform:translate(-2px,-2px);
}
.btn:active{transform:none;box-shadow:none}
.btn--signal{border-color:var(--c-signal);background:var(--c-signal);color:var(--c-ink)}
.btn--signal:hover{background:var(--c-lime);border-color:var(--c-lime);color:var(--c-ink)}
.btn--ink{border-color:var(--c-ink);color:var(--c-ink)}
.btn--ink:hover{background:var(--c-ink);border-color:var(--c-ink);color:var(--c-lime);box-shadow:4px 4px 0 rgba(10,26,22,.35)}
.btn--quiet{border-color:transparent;padding-inline:.5rem;color:var(--c-gray)}
.btn--quiet:hover{color:var(--c-lime);border-color:transparent;box-shadow:none;transform:none}
.btn--block{width:100%}

/* 8. 面包屑 --------------------------------------------------------------- */
.breadcrumbs{padding-top:1.25rem}
.breadcrumbs__list{
  list-style:none;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:.5rem;
  font-family:var(--font-mono);
  font-size:.6875rem;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--c-gray);
}
.breadcrumbs__item{display:flex;align-items:center;gap:.5rem}
.breadcrumbs__item+.breadcrumbs__item::before{content:"/";color:var(--c-steel)}
.breadcrumbs__link{color:var(--c-gray);text-decoration:none;border-bottom:1px solid transparent;transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease)}
.breadcrumbs__link:hover{color:var(--c-lime);border-bottom-color:var(--c-lime)}
.breadcrumbs__current{color:var(--c-paper)}

/* 9. 图片容器（页面阶段放置占位） ----------------------------------------- */
.figure{margin:0;border:2px solid var(--c-steel);background:var(--c-charcoal)}
.figure__media{
  position:relative;
  width:100%;
  aspect-ratio:16/9;
  overflow:hidden;
  background-color:var(--c-indigo);
  background-image:
    linear-gradient(135deg,rgba(53,224,208,.07),transparent 62%),
    repeating-linear-gradient(0deg,rgba(138,147,166,.12) 0 1px,transparent 1px 20px),
    repeating-linear-gradient(90deg,rgba(138,147,166,.12) 0 1px,transparent 1px 20px);
}
.figure__media img{width:100%;height:100%;object-fit:cover}
.figure__media--square{aspect-ratio:1/1}
.figure__media--wide{aspect-ratio:21/9}
.figure__caption{
  padding:.85rem 1rem;
  border-top:2px solid var(--c-steel);
  font-family:var(--font-mono);
  font-size:.75rem;
  letter-spacing:.1em;
  color:var(--c-gray);
}

/* 10. 显现动效 ------------------------------------------------------------ */
.js [data-reveal]{
  opacity:0;
  transform:translateY(8px);
  transition:opacity var(--dur) var(--ease),transform var(--dur) var(--ease);
}
.js [data-reveal].is-visible{opacity:1;transform:none}

/* 11. 顶部状态条与品牌 ---------------------------------------------------- */
.site-header{position:relative;z-index:60}
.scroll-progress{
  position:fixed;
  top:0;left:0;right:0;
  height:3px;
  background:var(--c-lime);
  transform:scaleX(0);
  transform-origin:0 50%;
  z-index:120;
  pointer-events:none;
}
.skip-link{
  position:absolute;
  left:1rem;
  top:-120px;
  z-index:200;
  padding:.75rem 1.25rem;
  background:var(--c-lime);
  color:var(--c-ink);
  font-weight:700;
  text-decoration:none;
  border:2px solid var(--c-ink);
  transition:top var(--dur) var(--ease);
}
.skip-link:focus{top:1rem}

.status-bar{
  position:sticky;
  top:0;
  z-index:65;
  height:var(--status-h);
  background:var(--c-indigo);
  border-bottom:2px solid var(--c-steel);
}
.status-bar__inner{
  height:100%;
  max-width:var(--content-max);
  margin-inline:auto;
  padding-inline:clamp(1rem,3.5vw,3rem);
  display:flex;
  align-items:center;
  gap:clamp(.75rem,2vw,1.5rem);
}
.brand{
  flex:0 0 auto;
  display:inline-flex;
  align-items:center;
  gap:.7rem;
  text-decoration:none;
  color:var(--c-paper);
}
.brand__glyph{
  width:12px;height:12px;
  flex:0 0 auto;
  background:var(--c-lime);
  box-shadow:3px 3px 0 var(--c-signal);
}
.brand__text{display:flex;flex-direction:column;gap:.3rem;line-height:1}
.brand__name{font-size:1.125rem;font-weight:900;letter-spacing:.06em}
.brand__callsign{
  font-family:var(--font-mono);
  font-size:.625rem;
  letter-spacing:.24em;
  text-transform:uppercase;
  color:var(--c-lime);
}
.status-bar__coord{
  display:flex;
  align-items:center;
  gap:.6rem;
  margin-left:clamp(.5rem,3vw,2.5rem);
  font-family:var(--font-mono);
  font-size:.6875rem;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--c-gray);
}
.coord__index{color:var(--c-lime);font-weight:700}
.coord__label{color:var(--c-paper)}
.coord__ver{border:1px solid var(--c-steel);padding:.15rem .45rem;color:var(--c-cyan)}
.status-bar__actions{margin-left:auto;display:flex;align-items:center;gap:.75rem}
.nav-toggle{
  display:none;
  align-items:center;
  gap:.55rem;
  padding:.55rem .75rem;
  border:2px solid var(--c-steel);
  background:var(--c-charcoal);
  color:var(--c-paper);
  font-family:var(--font-mono);
  font-size:.6875rem;
  letter-spacing:.18em;
  text-transform:uppercase;
  cursor:pointer;
  transition:border-color var(--dur) var(--ease),color var(--dur) var(--ease);
}
.nav-toggle:hover{border-color:var(--c-lime);color:var(--c-lime)}
.nav-toggle__bars{
  position:relative;
  display:block;
  width:18px;height:2px;
  background:currentColor;
  transition:background-color var(--dur) var(--ease);
}
.nav-toggle__bars::before,
.nav-toggle__bars::after{
  content:"";
  position:absolute;
  left:0;
  width:18px;height:2px;
  background:currentColor;
  transition:transform var(--dur) var(--ease),top var(--dur) var(--ease);
}
.nav-toggle__bars::before{top:-6px}
.nav-toggle__bars::after{top:6px}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars{background:transparent}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before{top:0;transform:rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{top:0;transform:rotate(-45deg)}

/* 12. 左侧导航轨道 -------------------------------------------------------- */
.rail{
  position:fixed;
  top:0;left:0;bottom:0;
  width:var(--rail-w);
  z-index:70;
  display:flex;
  flex-direction:column;
  background:var(--c-charcoal);
  border-right:2px solid var(--c-steel);
  padding:0 1.1rem 1.5rem;
  overflow-y:auto;
  overscroll-behavior:contain;
}
.rail::after{
  content:"";
  position:absolute;
  top:calc(var(--status-h) + 2rem);
  right:0;
  width:6px;
  height:min(52vh,26rem);
  background-image:repeating-linear-gradient(to bottom,var(--c-steel) 0 1px,transparent 1px 16px);
  pointer-events:none;
}
.rail__label{
  display:flex;
  align-items:center;
  min-height:var(--status-h);
  margin-bottom:1.25rem;
  border-bottom:2px solid var(--c-steel);
  font-family:var(--font-mono);
  font-size:.625rem;
  letter-spacing:.24em;
  text-transform:uppercase;
  color:var(--c-gray);
}
.nav-list{list-style:none;display:flex;flex-direction:column;gap:2px}
.nav-link{
  display:flex;
  align-items:center;
  gap:.7rem;
  padding:.7rem .6rem;
  border-left:3px solid transparent;
  color:var(--c-gray);
  font-size:.9375rem;
  line-height:1.4;
  text-decoration:none;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease),background-color var(--dur) var(--ease),transform var(--dur) var(--ease);
}
.nav-link__idx{
  font-family:var(--font-mono);
  font-size:.6875rem;
  letter-spacing:.14em;
  color:var(--c-steel);
  transition:color var(--dur) var(--ease);
}
.nav-link__label{white-space:nowrap}
.nav-link:hover{
  color:var(--c-paper);
  border-left-color:var(--c-lime);
  background:var(--c-indigo);
  transform:translateX(2px);
}
.nav-link:hover .nav-link__idx{color:var(--c-lime)}
.nav-link[aria-current="page"]{
  color:var(--c-paper);
  font-weight:700;
  border-left-color:var(--c-lime);
  background:var(--c-indigo);
}
.nav-link[aria-current="page"] .nav-link__idx{color:var(--c-lime)}
.rail__foot{
  margin-top:auto;
  padding-top:1rem;
  border-top:2px solid var(--c-steel);
}
.rail__foot-link{
  display:flex;
  justify-content:space-between;
  gap:.5rem;
  padding:.5rem 0;
  font-family:var(--font-mono);
  font-size:.6875rem;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--c-paper);
  text-decoration:none;
  transition:color var(--dur) var(--ease);
}
.rail__foot-link:hover{color:var(--c-signal)}
.nav-scrim{position:fixed;inset:0;z-index:68;background:rgba(10,26,22,.72)}

/* 13. 桌面端为轨道让位 ---------------------------------------------------- */
@media (min-width:1024px){
  body{padding-left:var(--rail-w)}
  .scroll-progress{left:var(--rail-w)}
}

/* 14. 平板与手机的抽屉状态 ------------------------------------------------ */
@media (max-width:1023px){
  .nav-toggle{display:inline-flex}
  .rail{
    width:min(86vw,20rem);
    z-index:88;
    transform:translateX(-102%);
    transition:transform 200ms var(--ease);
  }
  .rail[data-open]{transform:none;box-shadow:8px 0 0 var(--c-ink)}
  .nav-scrim{z-index:86}
}
@media (max-width:900px){
  .status-bar__coord{display:none}
}
@media (max-width:560px){
  .status-bar__actions .btn--signal{display:none}
  .brand__callsign{display:none}
}

/* 15. 页脚 ---------------------------------------------------------------- */
.site-footer{
  background:var(--c-charcoal);
  border-top:2px solid var(--c-steel);
  color:var(--c-paper-dim);
}
.footer-feedback{
  background:var(--c-signal);
  color:var(--c-ink);
  border-bottom:2px solid var(--c-ink);
}
.footer-feedback__inner{
  max-width:var(--content-max);
  margin-inline:auto;
  padding:clamp(1.4rem,3.5vw,2.25rem) clamp(1.1rem,3.5vw,3rem);
  display:grid;
  grid-template-columns:minmax(0,1fr) auto;
  align-items:center;
  gap:1.25rem 2rem;
}
.footer-feedback__text{display:flex;flex-direction:column;gap:.4rem}
.footer-feedback__eyebrow{
  font-family:var(--font-mono);
  font-size:.625rem;
  letter-spacing:.24em;
  text-transform:uppercase;
  opacity:.75;
}
.footer-feedback__title{
  font-size:clamp(1.25rem,2.6vw,1.9rem);
  font-weight:900;
  line-height:1.2;
  letter-spacing:-.01em;
}
.footer-feedback__meta{
  font-family:var(--font-mono);
  font-size:.6875rem;
  letter-spacing:.12em;
  opacity:.85;
}
@media (max-width:720px){
  .footer-feedback__inner{grid-template-columns:minmax(0,1fr)}
  .footer-feedback__inner .btn{justify-self:start}
}

.footer-grid{
  max-width:var(--content-max);
  margin-inline:auto;
  padding:clamp(2.5rem,5vw,4rem) clamp(1.1rem,3.5vw,3rem);
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:clamp(1.5rem,3vw,2.5rem);
}
@media (max-width:900px){.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:560px){.footer-grid{grid-template-columns:minmax(0,1fr)}}
.footer-col__title{
  font-family:var(--font-mono);
  font-size:.625rem;
  font-weight:400;
  letter-spacing:.24em;
  text-transform:uppercase;
  color:var(--c-gray);
  padding-bottom:.7rem;
  margin-bottom:1rem;
  border-bottom:2px solid var(--c-steel);
}
.footer-list{list-style:none;display:flex;flex-direction:column;gap:.45rem}
.footer-link{
  display:inline-block;
  padding:.15rem 0;
  color:var(--c-paper-dim);
  font-size:.875rem;
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.footer-link:hover{color:var(--c-lime);border-bottom-color:var(--c-lime)}
.footer-contact{list-style:none;display:flex;flex-direction:column;gap:.9rem}
.footer-contact__label{
  display:block;
  font-family:var(--font-mono);
  font-size:.625rem;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--c-gray);
}
.footer-contact__value{
  display:block;
  margin-top:.2rem;
  font-family:var(--font-mono);
  font-size:.8125rem;
  color:var(--c-paper);
  word-break:break-word;
}
.footer-note{
  margin-top:.9rem;
  max-width:36ch;
  font-size:.75rem;
  line-height:1.7;
  color:var(--c-gray);
}
.footer-legal{border-top:2px solid var(--c-steel)}
.footer-legal__inner{
  max-width:var(--content-max);
  margin-inline:auto;
  padding:1.25rem clamp(1.1rem,3.5vw,3rem);
  display:flex;
  flex-wrap:wrap;
  gap:.5rem 1.5rem;
  font-family:var(--font-mono);
  font-size:.6875rem;
  letter-spacing:.12em;
  color:var(--c-gray);
}
.footer-legal__icp{margin-left:auto;text-align:right}

/* 16. 底部固定反馈入口 ---------------------------------------------------- */
.feedback-dock{
  position:fixed;
  right:clamp(1rem,2.5vw,1.75rem);
  bottom:clamp(1rem,2.5vw,1.75rem);
  z-index:75;
  display:inline-flex;
  align-items:center;
  gap:.5rem;
  padding:.7rem 1rem;
  background:var(--c-lime);
  color:var(--c-ink);
  border:2px solid var(--c-ink);
  box-shadow:var(--shadow-soft);
  font-family:var(--font-mono);
  font-size:.6875rem;
  letter-spacing:.18em;
  text-transform:uppercase;
  text-decoration:none;
  transition:transform var(--dur) var(--ease),box-shadow var(--dur) var(--ease),background-color var(--dur) var(--ease),opacity var(--dur) var(--ease),visibility var(--dur) var(--ease);
}
.feedback-dock:hover{
  background:var(--c-signal);
  transform:translate(-2px,-2px);
  box-shadow:var(--shadow-hard);
}
.feedback-dock.is-hidden{
  opacity:0;
  visibility:hidden;
  transform:translateY(10px);
  pointer-events:none;
}
.feedback-dock__dot{width:8px;height:8px;background:var(--c-ink)}

/* 17. 无障碍与动效偏好 ---------------------------------------------------- */
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  .js [data-reveal]{opacity:1;transform:none}
  .card:hover,.btn:hover,.nav-link:hover{transform:none}
}