/* ============================================================
   球帝带安装 · 共享样式表  /assets/site.css
   结构：tokens → reset → 中文排版 → 页头 → 页脚 → 通用组件
   ============================================================ */

/* ---------- 1. Tokens ---------- */
:root{
  --c-deep:#0E2A22;
  --c-deep-2:#1B453A;
  --c-steel:#2C6B74;
  --c-steel-soft:#8FB6BC;
  --c-amber:#E38B24;
  --c-amber-pale:#F7DCAE;
  --c-paper:#F4F1E8;
  --c-paper-2:#E5DFD0;
  --c-ink:#20282A;
  --c-mono:#3C5A73;
  --c-warn:#B0452E;
  --c-ok:#3E7A57;

  --f-display:"Barlow Condensed","Arial Narrow","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --f-editorial:"Noto Serif SC","Source Serif 4","Songti SC","SimSun",Georgia,serif;
  --f-body:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --f-mono:"IBM Plex Mono","JetBrains Mono","SFMono-Regular",Consolas,"Liberation Mono","Courier New",monospace;

  --shell-w:1240px;
  --gutter:clamp(1.1rem,4vw,2.6rem);

  --ease:cubic-bezier(.2,.7,.2,1);
  --dur:200ms;
}

/* ---------- 2. Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:7.5rem}
body{margin:0}
img,svg{display:block;max-width:100%}
button{font:inherit;color:inherit;background:none;border:0}
a{color:inherit;text-decoration:none}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,h5,p,figure,blockquote{margin:0}
table{border-collapse:collapse}
:focus-visible{outline:2px solid var(--c-amber);outline-offset:3px;border-radius:2px}

/* ---------- 3. 中文排版基调 ---------- */
body{
  background:var(--c-paper);
  color:var(--c-ink);
  font-family:var(--f-body);
  font-size:1.0625rem;
  line-height:1.75;
  letter-spacing:.005em;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  overflow-x:hidden;
}
h1,h2,h3,h4{font-family:var(--f-display);font-weight:900;line-height:1.15;letter-spacing:-.01em;color:var(--c-deep)}
p,li{text-wrap:pretty}
.mono{font-family:var(--f-mono);letter-spacing:.01em;font-weight:500}

.shell{
  width:calc(100% - var(--gutter) * 2);
  max-width:var(--shell-w);
  margin-inline:auto;
}

/* ---------- 4. Skip link ---------- */
.skip-link{
  position:fixed;
  left:50%;
  top:0;
  z-index:300;
  transform:translate(-50%,-160%);
  background:var(--c-amber);
  color:#231604;
  font-weight:700;
  font-size:.9rem;
  padding:.6rem 1.1rem;
  border-radius:0 0 6px 6px;
  transition:transform var(--dur) var(--ease);
}
.skip-link:focus{transform:translate(-50%,0)}

/* ---------- 5. 滚动进度 ---------- */
.scroll-meter{
  position:fixed;
  inset:0 0 auto 0;
  height:3px;
  z-index:210;
  pointer-events:none;
  background:rgba(143,182,188,.16);
}
.scroll-meter__fill{
  display:block;
  height:100%;
  width:100%;
  transform:scaleX(0);
  transform-origin:left center;
  background:var(--c-amber);
}

/* ---------- 6. 页头 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:150;
  font-family:var(--f-body);
}
.site-header__top{background:var(--c-deep);color:#E6F0ED}
.site-header__nav{
  position:relative;
  background:var(--c-deep-2);
  color:#E6F0ED;
  border-top:1px solid rgba(143,182,188,.18);
}

/* 6.1 品牌带 */
.header-bar{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:.7rem 1.5rem;
  flex-wrap:wrap;
  padding-block:.62rem;
}
.brand-lockup{display:flex;align-items:center;gap:.85rem;flex-wrap:wrap;min-width:0}
.brand-mark{
  display:inline-flex;
  align-items:center;
  gap:.55rem;
  font-family:var(--f-display);
  font-weight:900;
  font-size:1.42rem;
  line-height:1;
  letter-spacing:.015em;
  color:#fff;
}
.brand-mark::before{
  content:"";
  width:.66rem;
  height:.66rem;
  flex:none;
  background:var(--c-amber);
  border-radius:2px 7px 2px 7px;
}
.brand-tagline{
  font-size:.82rem;
  letter-spacing:.16em;
  line-height:1;
  color:var(--c-steel-soft);
  padding-left:.85rem;
  border-left:1px solid rgba(143,182,188,.4);
}
.brand-locale{
  font-size:.7rem;
  letter-spacing:.08em;
  line-height:1.2;
  color:#9FB8B2;
  border:1px solid rgba(143,182,188,.35);
  border-radius:3px;
  padding:.18rem .42rem;
}
.brandbar-meta{display:flex;align-items:center;gap:.9rem;flex-wrap:wrap}
.version-chip{
  display:inline-flex;
  align-items:center;
  gap:.45rem;
  font-family:var(--f-mono);
  font-size:.72rem;
  line-height:1.5;
  letter-spacing:.02em;
  background:var(--c-amber-pale);
  color:#3A2A06;
  border-radius:999px;
  padding:.22rem .72rem;
}
.version-chip::before{
  content:"";
  width:.4rem;
  height:.4rem;
  border-radius:50%;
  background:var(--c-amber);
  box-shadow:0 0 0 3px rgba(227,139,36,.22);
  flex:none;
}
.brandbar-link{
  font-size:.82rem;
  color:#BBD3CE;
  border-bottom:1px dashed rgba(143,182,188,.55);
  padding-bottom:1px;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.brandbar-link:hover,.brandbar-link:focus-visible{color:var(--c-amber-pale);border-bottom-color:var(--c-amber-pale)}

/* 6.2 栏目带 */
.nav-bar{
  display:flex;
  align-items:center;
  gap:1rem;
  padding-block:.35rem;
  position:relative;
}
.primary-nav{flex:1 1 auto;min-width:0}
.nav-list{display:flex;align-items:center;gap:clamp(.65rem,2vw,1.7rem);flex-wrap:wrap}
.nav-list a{
  position:relative;
  display:inline-block;
  padding:.72rem .1rem;
  font-size:.95rem;
  font-weight:500;
  letter-spacing:.02em;
  color:#C6DAD5;
  transition:color var(--dur) var(--ease);
}
.nav-list a::after{
  content:"";
  position:absolute;
  left:.1rem;
  right:.1rem;
  bottom:.35rem;
  height:2px;
  background:var(--c-amber);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform var(--dur) var(--ease);
}
.nav-list a:hover{color:#fff}
.nav-list a:hover::after{transform:scaleX(1)}
.nav-list a[aria-current="page"]{color:#fff;font-weight:700}
.nav-list a[aria-current="page"]::after{transform:scaleX(1)}
.nav-bar__actions{display:flex;align-items:center;gap:.6rem;margin-left:auto;flex:none}

/* 6.3 移动导航按钮 */
.nav-toggle{
  display:none;
  align-items:center;
  gap:.55rem;
  padding:.52rem .72rem;
  border-radius:6px;
  border:1px solid rgba(143,182,188,.4);
  background:rgba(143,182,188,.08);
  color:#DFECE8;
  font-size:.85rem;
  font-weight:600;
  cursor:pointer;
  transition:background-color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.nav-toggle:hover{background:rgba(143,182,188,.18);border-color:var(--c-steel-soft)}
.nav-toggle__bars{
  display:inline-flex;
  flex-direction:column;
  justify-content:space-between;
  width:16px;
  height:12px;
  flex:none;
}
.nav-toggle__bars span{
  display:block;
  height:2px;
  border-radius:1px;
  background:currentColor;
  transition:transform var(--dur) var(--ease),opacity var(--dur) var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(1){transform:translateY(5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(3){transform:translateY(-5px) rotate(-45deg)}

/* ---------- 7. 页脚 ---------- */
.site-footer{
  margin-top:clamp(3rem,8vw,6rem);
  background:var(--c-deep);
  color:#C9DAD6;
  font-size:.94rem;
  line-height:1.7;
}
.footer-main{
  display:grid;
  grid-template-columns:minmax(0,1fr);
  gap:2rem;
  padding-block:clamp(2.2rem,5vw,3.2rem) 1.5rem;
}
.footer-brand__name{
  font-family:var(--f-display);
  font-weight:900;
  font-size:1.9rem;
  line-height:1.1;
  color:#fff;
  letter-spacing:.01em;
}
.footer-brand__tag{
  margin-top:.35rem;
  font-size:.88rem;
  letter-spacing:.04em;
  color:var(--c-steel-soft);
}
.footer-brand__meta{
  margin-top:1rem;
  font-size:.82rem;
  color:#8FA8A3;
  max-width:32ch;
}
.footer-nav{display:grid;grid-template-columns:repeat(auto-fit,minmax(148px,1fr));gap:1.5rem 1.6rem}
.footer-col__title{
  font-family:var(--f-mono);
  font-weight:600;
  font-size:.74rem;
  letter-spacing:.16em;
  color:var(--c-steel-soft);
  margin-bottom:.85rem;
}
.footer-col ul{display:grid;gap:.45rem}
.footer-col a{
  color:#CBDDD9;
  border-bottom:1px solid transparent;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.footer-col a:hover,.footer-col a:focus-visible{color:#fff;border-bottom-color:var(--c-amber)}

.footer-contact{
  border-top:1px solid rgba(143,182,188,.2);
  padding-block:1.7rem;
}
.footer-contact__title{
  font-family:var(--f-mono);
  font-weight:600;
  font-size:.74rem;
  letter-spacing:.16em;
  color:var(--c-steel-soft);
  margin-bottom:1rem;
}
.contact-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:1.1rem 2rem}
.contact-item{display:flex;flex-direction:column;gap:.28rem;min-width:0}
.contact-item__key{
  font-family:var(--f-mono);
  font-size:.72rem;
  letter-spacing:.12em;
  color:var(--c-steel-soft);
}
.contact-item__value{color:#E4EFEC;font-size:.92rem;word-break:break-word}
.footer-note{
  margin-top:1.3rem;
  font-size:.82rem;
  line-height:1.75;
  color:#8FA8A3;
  max-width:62ch;
}
.footer-contact .btn{margin-top:1.2rem}

.footer-base{background:#0A1F19;border-top:1px solid rgba(143,182,188,.16)}
.footer-base__inner{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:.5rem 1.5rem;
  padding-block:.95rem;
  font-size:.8rem;
  color:#7E9A94;
}
.footer-copy{margin-right:auto}
.footer-legal{display:flex;flex-wrap:wrap;gap:.4rem 1.1rem}
.footer-legal a{color:#9FBAB4;transition:color var(--dur) var(--ease)}
.footer-legal a:hover,.footer-legal a:focus-visible{color:var(--c-amber)}
.footer-icp{font-family:var(--f-mono);letter-spacing:.02em;color:#7E9A94}

/* ---------- 8. 通用按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.5rem;
  font-family:var(--f-body);
  font-size:.9rem;
  font-weight:700;
  letter-spacing:.03em;
  line-height:1.3;
  padding:.62rem 1.15rem;
  border-radius:6px;
  border:1px solid transparent;
  cursor:pointer;
  text-align:center;
  transition:background-color var(--dur) var(--ease),color var(--dur) var(--ease),
             border-color var(--dur) var(--ease),transform var(--dur) var(--ease),
             box-shadow var(--dur) var(--ease);
}
.btn--cta{background:var(--c-amber);color:#22160A;box-shadow:0 2px 0 rgba(0,0,0,.35)}
.btn--cta:hover{background:#F09A34;transform:translateY(-1px);box-shadow:0 4px 0 rgba(0,0,0,.28)}
.btn--cta:active{transform:translateY(0);box-shadow:0 1px 0 rgba(0,0,0,.35)}
.btn--solid{background:var(--c-steel);color:#fff}
.btn--solid:hover{background:#34808B}
.btn--ghost{background:transparent;color:#DFECE8;border-color:rgba(143,182,188,.45)}
.btn--ghost:hover{background:rgba(143,182,188,.14);border-color:var(--c-steel-soft);color:#fff}
.btn--outline{background:transparent;color:var(--c-deep-2);border-color:rgba(44,107,116,.5)}
.btn--outline:hover{background:rgba(44,107,116,.1);border-color:var(--c-steel)}

/* ---------- 9. 正文容器与网格 ---------- */
.page-body{padding-bottom:clamp(1.5rem,5vw,3rem)}
.section{padding-block:clamp(2rem,6vw,4.5rem)}
.section--paper{background:var(--c-paper-2)}
.section--deep{background:var(--c-deep);color:#DCEAE6}
.section--deep h2,.section--deep h3{color:#fff}
.section--steel{background:var(--c-steel);color:#EAF4F4}
.section--steel h2,.section--steel h3{color:#fff}

.editorial{display:grid;grid-template-columns:minmax(0,1fr);gap:1.5rem}
.editorial__aside{min-width:0}
.editorial__main{min-width:0}

.eyebrow{
  font-family:var(--f-mono);
  font-size:.74rem;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--c-steel);
}
.section-title{
  font-family:var(--f-display);
  font-weight:900;
  font-size:clamp(1.6rem,3.6vw,2.4rem);
  line-height:1.14;
  letter-spacing:-.01em;
  color:var(--c-deep);
}
.lede{
  font-size:1.08rem;
  line-height:1.7;
  color:#3B4A4A;
  max-width:40ch;
}

.prose{max-width:42em}
.prose p+p{margin-top:1rem}
.prose h2,.prose h3{margin-top:1.9em;margin-bottom:.55em}
.prose h2:first-child,.prose h3:first-child{margin-top:0}
.prose ul{margin-top:1rem;padding-left:0;list-style:none}
.prose ul li{position:relative;padding-left:1.15rem}
.prose ul li+li{margin-top:.5rem}
.prose ul li::before{
  content:"";
  position:absolute;
  left:0;
  top:.72em;
  width:.42rem;
  height:.42rem;
  background:var(--c-amber);
  border-radius:1px 3px 1px 3px;
}
.prose ol{margin-top:1rem;padding-left:1.5em;list-style:decimal}
.prose ol li+li{margin-top:.5rem}
.prose blockquote{
  margin-top:1.4rem;
  padding-left:1.1rem;
  border-left:3px solid var(--c-amber);
  font-family:var(--f-editorial);
  font-size:1.05rem;
  color:#3B4A4A;
}

/* ---------- 10. 面包屑 ---------- */
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:.1rem .5rem;
  padding-block:1.15rem .2rem;
  font-size:.82rem;
  color:var(--c-mono);
}
.breadcrumb li{display:inline-flex;align-items:center;gap:.5rem}
.breadcrumb li+li::before{content:"/";color:var(--c-steel-soft)}
.breadcrumb a{color:var(--c-steel);border-bottom:1px solid rgba(44,107,116,.3)}
.breadcrumb a:hover,.breadcrumb a:focus-visible{color:var(--c-amber);border-bottom-color:var(--c-amber)}

/* ---------- 11. 数据表格 ---------- */
.table-scroll{
  overflow-x:auto;
  overscroll-behavior-x:contain;
  -webkit-overflow-scrolling:touch;
  scrollbar-width:thin;
  scrollbar-color:rgba(44,107,116,.4) transparent;
}
.table-scroll::-webkit-scrollbar{height:8px}
.table-scroll::-webkit-scrollbar-thumb{background:rgba(44,107,116,.4);border-radius:4px}
.table-scroll::-webkit-scrollbar-track{background:rgba(143,182,188,.16);border-radius:4px}

.data-table{width:100%;min-width:640px;font-size:.92rem}
.data-table th,.data-table td{
  text-align:left;
  padding:.72rem .95rem;
  border-bottom:1px solid rgba(32,40,42,.12);
  vertical-align:top;
}
.data-table thead th{
  background:var(--c-deep-2);
  color:#fff;
  font-weight:600;
  font-size:.82rem;
  letter-spacing:.04em;
}
.data-table tbody tr:nth-child(even){background:rgba(229,223,208,.55)}
.data-table .mono{color:var(--c-mono);font-weight:600}

/* ---------- 12. 图片容器 ---------- */
.figure-frame{
  position:relative;
  overflow:hidden;
  border-radius:14px;
  background:var(--c-paper-2);
  border:1px solid rgba(32,40,42,.08);
}
.figure-frame img{
  width:100%;
  height:100%;
  object-fit:cover;
  filter:saturate(.88) contrast(1.04);
}
.figure-frame--wide{aspect-ratio:16/9}
.figure-frame--square{aspect-ratio:1/1}
.figure-frame--tall{aspect-ratio:3/4}
.figure-frame__tag{
  position:absolute;
  left:.75rem;
  bottom:.75rem;
  font-family:var(--f-mono);
  font-size:.72rem;
  line-height:1.5;
  letter-spacing:.02em;
  background:rgba(14,42,34,.84);
  color:var(--c-amber-pale);
  padding:.2rem .58rem;
  border-radius:4px;
}

/* ---------- 13. Chip 与锚点目录 ---------- */
.chip{
  display:inline-flex;
  align-items:center;
  gap:.35rem;
  font-size:.8rem;
  line-height:1.5;
  padding:.3rem .75rem;
  border-radius:999px;
  border:1px solid rgba(143,182,188,.7);
  background:rgba(143,182,188,.12);
  color:var(--c-mono);
  cursor:pointer;
  transition:background-color var(--dur) var(--ease),color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.chip:hover{border-color:var(--c-steel);color:var(--c-deep)}
.chip.is-active,.chip[aria-pressed="true"]{background:var(--c-deep-2);border-color:var(--c-deep-2);color:#fff}

.toc-rail{display:grid;gap:.1rem;font-size:.85rem}
.toc-rail a{
  display:block;
  padding:.4rem 0 .4rem .9rem;
  border-left:2px solid rgba(143,182,188,.45);
  color:var(--c-mono);
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.toc-rail a:hover{color:var(--c-deep);border-left-color:var(--c-steel)}
.toc-rail a.is-active{color:var(--c-deep);border-left-color:var(--c-amber);font-weight:700}

/* ---------- 14. 显现动效 ---------- */
[data-reveal].is-in{animation:reveal-in 460ms var(--ease) both}
@keyframes reveal-in{
  from{opacity:0;transform:translateY(14px)}
  to{opacity:1;transform:none}
}

/* ---------- 15. 响应式 ---------- */
@media (min-width:820px){
  .footer-main{grid-template-columns:minmax(230px,.9fr) minmax(0,2fr)}
}
@media (min-width:1000px){
  .editorial{grid-template-columns:minmax(150px,1fr) minmax(0,3.4fr);gap:clamp(1.6rem,4vw,3.4rem)}
}

@media (max-width:900px){
  html{scroll-padding-top:6.5rem}
  .nav-toggle{display:inline-flex}
  .nav-bar{padding-block:.5rem}
  .primary-nav{
    position:absolute;
    left:0;
    right:0;
    top:100%;
    background:var(--c-deep-2);
    border-top:1px solid rgba(143,182,188,.25);
    border-bottom:1px solid rgba(143,182,188,.25);
    box-shadow:0 24px 44px -24px rgba(0,0,0,.75);
    max-height:0;
    overflow:hidden;
    visibility:hidden;
    transition:max-height 240ms var(--ease),visibility 240ms var(--ease);
  }
  .primary-nav[data-open="true"]{
    max-height:min(72vh,540px);
    overflow-y:auto;
    visibility:visible;
  }
  .primary-nav .nav-list{
    flex-direction:column;
    align-items:stretch;
    gap:0;
    padding:.3rem var(--gutter) 1.1rem;
  }
  .primary-nav .nav-list a{
    display:block;
    padding:.88rem .1rem;
    font-size:1rem;
    border-bottom:1px solid rgba(143,182,188,.16);
  }
  .primary-nav .nav-list a::after{display:none}
  .primary-nav .nav-list a[aria-current="page"]{
    color:var(--c-amber-pale);
    padding-left:.9rem;
    box-shadow:inset 3px 0 0 var(--c-amber);
  }
}

@media (max-width:640px){
  body{font-size:1rem}
  .brand-mark{font-size:1.25rem}
  .brand-tagline{font-size:.76rem;letter-spacing:.12em;padding-left:.7rem}
  .header-bar{padding-block:.55rem}
  .btn{font-size:.86rem;padding:.56rem .95rem}
  .footer-base__inner{font-size:.76rem}
  .footer-icp{margin-left:0;flex-basis:100%}
}

@media (max-width:420px){
  .nav-toggle__label{display:none}
  .brand-locale{display:none}
}

@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-reveal].is-in{animation:none;opacity:1;transform:none}
}