/* ==========================================================================
   博奥体育主站 · 共享站点工具包 /assets/site.css
   深空蓝底 + 电光青坐标 + 赛道橙变更 + 信号绿状态
   ========================================================================== */

/* ---------- 1. 设计变量 ---------- */
:root{
  --bos-deep:#071426;
  --bos-mid:#0C2038;
  --bos-panel:#122E4A;
  --bos-cyan:#2BE0E8;
  --bos-cyan-hi:#8DF6FA;
  --bos-orange:#FF6A2B;
  --bos-green:#3BE08A;
  --bos-text:#E6F3FF;
  --bos-mist:#8FA9C4;
  --bos-line:#2A4A66;
  --bos-sans:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --bos-mono:"JetBrains Mono","Roboto Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --bos-max:1280px;
  --bos-gutter:24px;
  --bos-radius:2px;
  --bos-cut:16px;
  --bos-hdr-h:68px;
}

/* ---------- 2. Reset & 基础排版 ---------- */
*,*::before,*::after{box-sizing:border-box}
html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:calc(var(--bos-hdr-h) + 52px);
}
body{
  margin:0;
  font-family:var(--bos-sans);
  font-size:16px;
  line-height:1.75;
  color:var(--bos-text);
  background-color:var(--bos-deep);
  background-image:
    radial-gradient(1100px 520px at 82% -8%,rgba(43,224,232,.10),transparent 62%),
    radial-gradient(760px 420px at 0% 2%,rgba(255,106,43,.07),transparent 58%),
    linear-gradient(rgba(42,74,102,.13) 1px,transparent 1px),
    linear-gradient(90deg,rgba(42,74,102,.13) 1px,transparent 1px);
  background-size:auto,auto,96px 96px,96px 96px;
  background-repeat:no-repeat,no-repeat,repeat,repeat;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}
h1,h2,h3,h4,h5{margin:0 0 .55em;font-weight:900;line-height:1.15;letter-spacing:-.01em}
p{margin:0 0 1em}
ul,ol{margin:0 0 1em;padding-left:1.2em}
img,svg,video{max-width:100%;height:auto}
a{color:var(--bos-cyan);text-decoration-color:rgba(43,224,232,.45);text-underline-offset:3px}
a:hover{color:var(--bos-cyan-hi)}
button{font:inherit;color:inherit}
hr{border:0;border-top:1px solid var(--bos-line);margin:2rem 0}
:where(a,button,input,select,textarea,summary,[tabindex]):focus-visible{
  outline:2px solid var(--bos-cyan);
  outline-offset:3px;
}
::selection{background:rgba(43,224,232,.28);color:#fff}

/* ---------- 3. 工具类 ---------- */
.bos-mono{font-family:var(--bos-mono);font-variant-numeric:tabular-nums;letter-spacing:.02em}
.bos-muted{color:var(--bos-mist)}
.bos-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;
}
.bos-skip{
  position:fixed;top:8px;left:8px;z-index:200;
  display:inline-block;padding:10px 18px;
  background:var(--bos-cyan);color:var(--bos-deep);
  font-weight:700;font-size:14px;text-decoration:none;
  border-radius:var(--bos-radius);
  transform:translateY(-160%);
  transition:transform .2s ease;
}
.bos-skip:focus{transform:translateY(0);color:var(--bos-deep)}

/* ---------- 4. 布局容器 ---------- */
.bos-container{
  width:100%;
  max-width:var(--bos-max);
  margin-inline:auto;
  padding-inline:clamp(16px,4vw,24px);
}
.bos-grid{
  display:grid;
  gap:var(--bos-gutter);
  grid-template-columns:repeat(12,minmax(0,1fr));
}
.bos-section{
  position:relative;
  padding-block:clamp(48px,7vw,96px);
}
.bos-section--band{
  background:linear-gradient(180deg,rgba(12,32,56,.92),rgba(7,20,38,.42));
  border-block:1px solid var(--bos-line);
}
.bos-section__head{
  display:grid;
  gap:10px;
  max-width:54ch;
  margin-bottom:clamp(24px,4vw,44px);
}
.bos-eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--bos-mono);
  font-size:11px;
  font-weight:500;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--bos-cyan);
}
.bos-eyebrow::before{content:"";width:22px;height:1px;background:currentColor;flex:0 0 auto}
.bos-prose{max-width:38em;font-size:17px;line-height:1.78;color:rgba(230,243,255,.88)}
.bos-prose p:last-child{margin-bottom:0}

/* ---------- 5. 按钮 ---------- */
.bos-btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:11px 20px;
  border:1px solid transparent;
  border-radius:var(--bos-radius);
  font-family:var(--bos-sans);
  font-size:14px;
  font-weight:700;
  line-height:1.2;
  letter-spacing:.02em;
  text-decoration:none;
  white-space:nowrap;
  cursor:pointer;
  transition:background-color .2s ease,color .2s ease,border-color .2s ease,transform .2s ease;
}
.bos-btn--primary{
  background:var(--bos-cyan);
  color:var(--bos-deep);
  clip-path:polygon(0 0,calc(100% - 12px) 0,100% 12px,100% 100%,0 100%);
}
.bos-btn--primary:hover{background:var(--bos-cyan-hi);color:var(--bos-deep);transform:translateY(-1px)}
.bos-btn--ghost{
  background:rgba(43,224,232,.05);
  border-color:var(--bos-line);
  color:var(--bos-text);
}
.bos-btn--ghost:hover{border-color:var(--bos-cyan);color:var(--bos-cyan-hi)}

/* ---------- 6. 标签 / 卡片 / 表格 ---------- */
.bos-tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:3px 9px;
  border:1px solid currentColor;
  border-radius:var(--bos-radius);
  font-family:var(--bos-mono);
  font-size:10.5px;
  font-weight:500;
  letter-spacing:.12em;
  text-transform:uppercase;
  line-height:1.6;
  white-space:nowrap;
}
.bos-tag--cyan{color:var(--bos-cyan);background:rgba(43,224,232,.08)}
.bos-tag--green{color:var(--bos-green);background:rgba(59,224,138,.08)}
.bos-tag--orange{color:var(--bos-orange);background:rgba(255,106,43,.10)}

.bos-card{
  position:relative;
  padding:clamp(18px,2.4vw,28px);
  background:linear-gradient(160deg,rgba(18,46,74,.94),rgba(12,32,56,.88));
  border:1px solid var(--bos-line);
  border-radius:var(--bos-radius);
  clip-path:polygon(0 0,calc(100% - var(--bos-cut)) 0,100% var(--bos-cut),100% 100%,var(--bos-cut) 100%,0 calc(100% - var(--bos-cut)));
}
.bos-card--accent::before{
  content:"";
  position:absolute;
  top:0;
  left:0;
  width:56px;
  height:2px;
  background:linear-gradient(90deg,var(--bos-cyan),var(--bos-cyan-hi));
}
.bos-card > :last-child{margin-bottom:0}

.bos-table{
  width:100%;
  border-collapse:collapse;
  font-size:15px;
}
.bos-table th{
  padding:10px 14px;
  background:rgba(12,32,56,.95);
  border-bottom:1px solid var(--bos-line);
  font-family:var(--bos-mono);
  font-size:11px;
  font-weight:500;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--bos-mist);
  text-align:left;
  white-space:nowrap;
}
.bos-table td{
  padding:12px 14px;
  border-bottom:1px solid rgba(42,74,102,.6);
  vertical-align:top;
}
.bos-table tbody tr:hover{background:rgba(43,224,232,.05)}

/* ---------- 7. 深色图片容器（页面阶段放入 <img>） ---------- */
.bos-figure{
  position:relative;
  margin:0;
  overflow:hidden;
  aspect-ratio:16/9;
  border:1px solid var(--bos-line);
  border-radius:var(--bos-radius);
  background-color:var(--bos-mid);
  background-image:
    radial-gradient(120% 90% at 85% 0%,rgba(43,224,232,.16),transparent 60%),
    radial-gradient(80% 80% at 0% 100%,rgba(255,106,43,.12),transparent 62%),
    repeating-linear-gradient(90deg,rgba(42,74,102,.45) 0 1px,transparent 1px 24px),
    repeating-linear-gradient(0deg,rgba(42,74,102,.45) 0 1px,transparent 1px 24px);
}
.bos-figure--wide{aspect-ratio:21/9}
.bos-figure--square{aspect-ratio:1/1}
.bos-figure--tall{aspect-ratio:4/5}
.bos-figure__img{
  display:block;
  width:100%;
  height:100%;
  object-fit:cover;
}
.bos-figure__caption{
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  padding:14px 16px;
  background:linear-gradient(180deg,transparent,rgba(7,20,38,.92));
  font-family:var(--bos-mono);
  font-size:10.5px;
  letter-spacing:.12em;
  color:var(--bos-cyan-hi);
}

/* ---------- 8. 面包屑 ---------- */
.bos-breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  margin:0 0 18px;
  padding:0;
  list-style:none;
  font-family:var(--bos-mono);
  font-size:11px;
  letter-spacing:.1em;
  color:var(--bos-mist);
}
.bos-breadcrumb li{display:inline-flex;align-items:center;gap:8px}
.bos-breadcrumb li + li::before{content:"/";color:var(--bos-line)}
.bos-breadcrumb__link{color:var(--bos-mist);text-decoration:none}
.bos-breadcrumb__link:hover{color:var(--bos-cyan)}

/* ---------- 9. 章节目录（页面阶段协议） ---------- */
.bos-toc{
  display:grid;
  gap:2px;
  font-family:var(--bos-mono);
  font-size:11.5px;
  letter-spacing:.08em;
}
.bos-toc__link{
  display:flex;
  align-items:baseline;
  gap:10px;
  padding:7px 10px;
  border-left:2px solid transparent;
  color:var(--bos-mist);
  text-decoration:none;
  transition:color .2s ease,background-color .2s ease,border-color .2s ease;
}
.bos-toc__link:hover{color:var(--bos-text);background:rgba(43,224,232,.06)}
.bos-toc__link[aria-current="true"]{
  color:var(--bos-cyan);
  border-left-color:var(--bos-cyan);
  background:rgba(43,224,232,.08);
}

/* ==========================================================================
   10. 页头 —— 紧凑命令栏
   ========================================================================== */
.bos-header{
  position:sticky;
  top:0;
  z-index:60;
  background:linear-gradient(180deg,rgba(7,20,38,.97),rgba(12,32,56,.93));
  border-bottom:1px solid var(--bos-line);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  transition:box-shadow .25s ease;
}
.bos-header[data-scrolled]{
  box-shadow:0 18px 40px -24px rgba(0,0,0,.95),0 1px 0 rgba(43,224,232,.22);
}
.bos-header__inner{
  display:flex;
  align-items:center;
  gap:clamp(12px,2vw,28px);
  min-height:var(--bos-hdr-h);
  width:100%;
  max-width:var(--bos-max);
  margin-inline:auto;
  padding-inline:clamp(16px,4vw,24px);
}

/* 进度条 */
.bos-progress{
  position:absolute;
  inset:0 0 auto 0;
  height:2px;
  background:rgba(42,74,102,.55);
  overflow:hidden;
}
.bos-progress__bar{
  display:block;
  width:100%;
  height:100%;
  transform:scaleX(0);
  transform-origin:left center;
  background:linear-gradient(90deg,var(--bos-cyan),var(--bos-green));
}

/* 品牌 */
.bos-brand{
  display:inline-flex;
  align-items:center;
  gap:11px;
  flex:0 0 auto;
  color:var(--bos-text);
  text-decoration:none;
}
.bos-brand:hover{color:var(--bos-text)}
.bos-brand__mark{
  position:relative;
  display:block;
  width:30px;
  height:30px;
  flex:0 0 auto;
  border:1px solid rgba(43,224,232,.7);
  background:linear-gradient(135deg,rgba(43,224,232,.3),rgba(43,224,232,0) 62%);
  clip-path:polygon(0 0,100% 0,100% 70%,70% 100%,0 100%);
}
.bos-brand__mark::before{
  content:"";
  position:absolute;
  inset:7px;
  background:var(--bos-cyan);
  clip-path:polygon(0 0,100% 0,100% 38%,38% 100%,0 100%);
  opacity:.88;
}
.bos-brand__mark::after{
  content:"";
  position:absolute;
  left:-4px;
  right:-4px;
  top:50%;
  height:1px;
  background:var(--bos-orange);
  transform:rotate(-18deg);
  opacity:.85;
}
.bos-brand__text{display:flex;flex-direction:column;line-height:1.15}
.bos-brand__name{font-size:16px;font-weight:900;letter-spacing:.02em}
.bos-brand__code{
  font-family:var(--bos-mono);
  font-size:9.5px;
  letter-spacing:.16em;
  color:var(--bos-mist);
  text-transform:uppercase;
}

/* 主导航 */
.bos-nav{
  display:flex;
  align-items:center;
  margin-inline:auto;
}
.bos-nav__list{
  display:flex;
  align-items:center;
  gap:2px;
  margin:0;
  padding:0;
  list-style:none;
}
.bos-nav__item{list-style:none}
.bos-nav__link{
  position:relative;
  display:inline-flex;
  align-items:baseline;
  gap:6px;
  padding:10px 11px;
  border-radius:var(--bos-radius);
  color:var(--bos-mist);
  font-size:14px;
  font-weight:500;
  line-height:1;
  text-decoration:none;
  transition:color .2s ease,background-color .2s ease;
}
.bos-nav__link::after{
  content:"";
  position:absolute;
  left:11px;
  right:11px;
  bottom:4px;
  height:1px;
  background:var(--bos-cyan);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .25s ease;
}
.bos-nav__link:hover{color:var(--bos-text);background:rgba(43,224,232,.07)}
.bos-nav__link:hover::after{transform:scaleX(1)}
.bos-nav__link[aria-current="page"]{color:var(--bos-cyan-hi);background:rgba(43,224,232,.11)}
.bos-nav__link[aria-current="page"]::after{transform:scaleX(1)}
.bos-nav__idx{
  font-family:var(--bos-mono);
  font-size:10px;
  letter-spacing:.06em;
  color:var(--bos-cyan);
  opacity:.7;
}
.bos-nav__link[aria-current="page"] .bos-nav__idx{color:var(--bos-green);opacity:1}
.bos-nav__meta{display:none}

/* 头部动作区 */
.bos-header__actions{
  display:flex;
  align-items:center;
  gap:12px;
  margin-left:auto;
  flex:0 0 auto;
}
.bos-quick{
  display:flex;
  flex-direction:column;
  gap:1px;
  padding:4px 14px;
  border-left:1px solid var(--bos-line);
  line-height:1.3;
  text-decoration:none;
}
.bos-quick__label{font-size:12.5px;font-weight:700;color:var(--bos-text);transition:color .2s ease}
.bos-quick__note{
  font-family:var(--bos-mono);
  font-size:9.5px;
  letter-spacing:.13em;
  color:var(--bos-mist);
  text-transform:uppercase;
}
.bos-quick:hover .bos-quick__label{color:var(--bos-cyan-hi)}

/* 汉堡按钮 */
.bos-burger{
  display:none;
  align-items:center;
  gap:9px;
  padding:9px 12px;
  border:1px solid var(--bos-line);
  border-radius:var(--bos-radius);
  background:rgba(43,224,232,.05);
  color:var(--bos-text);
  font-family:var(--bos-mono);
  font-size:11px;
  letter-spacing:.12em;
  cursor:pointer;
}
.bos-burger:hover{border-color:var(--bos-cyan);color:var(--bos-cyan-hi)}
.bos-burger__bars{
  display:inline-flex;
  flex-direction:column;
  justify-content:space-between;
  width:18px;
  height:12px;
}
.bos-burger__bars span{
  display:block;
  width:100%;
  height:2px;
  background:currentColor;
  transition:transform .22s ease,opacity .22s ease;
}
.bos-header[data-open] .bos-burger__bars span:nth-child(1){transform:translateY(5px) rotate(45deg)}
.bos-header[data-open] .bos-burger__bars span:nth-child(2){opacity:0}
.bos-header[data-open] .bos-burger__bars span:nth-child(3){transform:translateY(-5px) rotate(-45deg)}

/* 状态带 */
.bos-statusbar{
  border-top:1px solid rgba(42,74,102,.7);
  background:rgba(7,20,38,.72);
}
.bos-statusbar__inner{
  display:flex;
  align-items:center;
  gap:10px;
  width:100%;
  max-width:var(--bos-max);
  margin-inline:auto;
  padding:4px clamp(16px,4vw,24px);
  font-family:var(--bos-mono);
  font-size:10.5px;
  letter-spacing:.12em;
  color:var(--bos-mist);
}
.bos-statusbar__text{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.bos-statusbar__ticks{
  flex:1 1 auto;
  min-width:24px;
  height:6px;
  background:repeating-linear-gradient(90deg,var(--bos-line) 0 1px,transparent 1px 12px);
  opacity:.55;
}
.bos-dot{
  display:inline-block;
  width:6px;
  height:6px;
  flex:0 0 auto;
  border-radius:50%;
  background:var(--bos-green);
  box-shadow:0 0 0 0 rgba(59,224,138,.5);
  animation:bos-pulse 2.4s ease-in-out infinite;
}
@keyframes bos-pulse{
  0%,100%{opacity:1;box-shadow:0 0 0 0 rgba(59,224,138,.5)}
  50%{opacity:.62;box-shadow:0 0 0 5px rgba(59,224,138,0)}
}

/* ==========================================================================
   11. 页脚 —— 坐标终端
   ========================================================================== */
.bos-footer{
  position:relative;
  margin-top:clamp(48px,8vw,96px);
  background:linear-gradient(180deg,rgba(10,27,48,.98),#050E1B 62%);
  border-top:1px solid var(--bos-line);
}
.bos-footer__edge{
  height:3px;
  background:repeating-linear-gradient(115deg,var(--bos-cyan) 0 14px,rgba(43,224,232,0) 14px 32px);
  opacity:.75;
}
.bos-footer__inner{
  display:grid;
  grid-template-columns:1.3fr 2fr 1.2fr;
  gap:clamp(28px,4vw,52px);
  padding-block:clamp(36px,5vw,64px) clamp(24px,3vw,36px);
}
.bos-footer__brandcol{display:grid;align-content:start;gap:0}
.bos-brand--footer .bos-brand__name{font-size:22px;letter-spacing:.01em}
.bos-brand--footer .bos-brand__mark{width:36px;height:36px}
.bos-footer__tagline{
  margin:16px 0 6px;
  font-size:13.5px;
  color:var(--bos-mist);
  letter-spacing:.04em;
}
.bos-footer__coords{
  margin:0;
  font-family:var(--bos-mono);
  font-size:10.5px;
  letter-spacing:.16em;
  color:rgba(43,224,232,.72);
  text-transform:uppercase;
}
.bos-footer__nav{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:clamp(16px,2.4vw,28px);
}
.bos-footer__col{min-width:0}
.bos-footer__title{
  display:flex;
  align-items:center;
  gap:8px;
  margin:0 0 14px;
  font-family:var(--bos-mono);
  font-size:11px;
  font-weight:500;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--bos-cyan);
}
.bos-footer__title::before{content:"";width:12px;height:1px;background:currentColor;flex:0 0 auto}
.bos-footer__list{margin:0;padding:0;list-style:none;display:grid;gap:9px}
.bos-footer__link{
  display:inline-block;
  font-size:14px;
  color:var(--bos-mist);
  text-decoration:none;
  transition:color .2s ease,transform .2s ease;
}
.bos-footer__link:hover{color:var(--bos-cyan-hi);transform:translateX(3px)}
.bos-footer__contact{min-width:0}
.bos-footer__meta{
  display:grid;
  grid-template-columns:44px minmax(0,1fr);
  gap:8px;
  align-items:baseline;
  font-size:13px;
  line-height:1.6;
  color:rgba(230,243,255,.86);
  word-break:break-word;
}
.bos-footer__key{
  font-family:var(--bos-mono);
  font-size:10px;
  letter-spacing:.12em;
  color:rgba(43,224,232,.72);
  text-transform:uppercase;
}
.bos-footer__note{
  margin:14px 0 0;
  font-family:var(--bos-mono);
  font-size:10.5px;
  letter-spacing:.08em;
  color:var(--bos-mist);
}
.bos-footer__base{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:10px;
  padding-block:16px 22px;
  border-top:1px solid rgba(42,74,102,.65);
}
.bos-footer__legal{
  margin:0;
  font-size:12.5px;
  color:var(--bos-mist);
  letter-spacing:.02em;
}
.bos-footer__build{
  font-family:var(--bos-mono);
  font-size:10px;
  letter-spacing:.18em;
  color:rgba(143,169,196,.7);
  text-transform:uppercase;
}

/* 返回顶部 */
.bos-to-top{
  position:fixed;
  right:clamp(14px,2vw,24px);
  bottom:clamp(14px,2vw,24px);
  z-index:80;
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:10px 14px;
  border:1px solid var(--bos-line);
  border-radius:var(--bos-radius);
  background:rgba(12,32,56,.95);
  color:var(--bos-cyan);
  font-family:var(--bos-mono);
  font-size:11px;
  letter-spacing:.14em;
  cursor:pointer;
  opacity:0;
  visibility:hidden;
  transform:translateY(10px);
  transition:opacity .25s ease,transform .25s ease,visibility .25s ease,border-color .2s ease,background-color .2s ease;
}
.bos-to-top[data-visible]{opacity:1;visibility:visible;transform:translateY(0)}
.bos-to-top:hover{border-color:var(--bos-cyan);background:rgba(43,224,232,.14)}
.bos-to-top__arrow{
  display:block;
  width:0;
  height:0;
  border-left:5px solid transparent;
  border-right:5px solid transparent;
  border-bottom:7px solid currentColor;
}
.bos-to-top__label{line-height:1}

/* ---------- 12. 入场动效协议 ---------- */
[data-reveal]{
  opacity:0;
  transform:translateY(16px);
  transition:opacity .55s ease,transform .55s ease;
}
[data-reveal][data-revealed]{opacity:1;transform:none}

/* ---------- 13. 滚动锁 ---------- */
body.bos-nav-open{overflow:hidden}

/* ==========================================================================
   14. 响应式
   ========================================================================== */
@media (max-width:1199.98px){
  .bos-quick{display:none}
}

@media (max-width:1023.98px){
  .bos-burger{display:inline-flex}
  .bos-nav{
    position:absolute;
    left:0;
    right:0;
    top:100%;
    display:block;
    margin:0;
    padding:8px clamp(16px,4vw,24px) 20px;
    max-height:calc(100vh - var(--bos-hdr-h) - 34px);
    overflow-y:auto;
    background:linear-gradient(180deg,rgba(12,32,56,.99),rgba(7,20,38,.99));
    border-top:1px solid var(--bos-line);
    border-bottom:1px solid var(--bos-line);
    opacity:0;
    visibility:hidden;
    transform:translateY(-10px);
    transition:opacity .22s ease,transform .22s ease,visibility .22s ease;
  }
  .bos-header[data-open] .bos-nav{opacity:1;visibility:visible;transform:translateY(0)}
  .bos-nav__list{flex-direction:column;align-items:stretch;gap:0}
  .bos-nav__link{
    display:flex;
    align-items:center;
    gap:14px;
    padding:15px 4px;
    font-size:16px;
    border-bottom:1px dashed rgba(42,74,102,.85);
    border-radius:0;
  }
  .bos-nav__link::after{display:none}
  .bos-nav__link[aria-current="page"]{background:transparent;color:var(--bos-cyan-hi)}
  .bos-nav__idx{font-size:11px;min-width:22px}
  .bos-nav__meta{
    display:flex;
    align-items:center;
    gap:9px;
    margin-top:16px;
    font-family:var(--bos-mono);
    font-size:10.5px;
    letter-spacing:.1em;
    color:var(--bos-mist);
  }
  .bos-footer__inner{grid-template-columns:1fr 1fr}
  .bos-footer__brandcol{grid-column:1 / -1}
  .bos-footer__contact{grid-column:1 / -1}
}

@media (max-width:767.98px){
  :root{--bos-hdr-h:60px;--bos-cut:14px}
  .bos-statusbar__inner{font-size:9.5px;letter-spacing:.08em}
  .bos-statusbar__ticks{display:none}
  .bos-brand__code{display:none}
  .bos-brand__name{font-size:15px}
  .bos-header__actions .bos-btn{padding:9px 14px;font-size:13px}
  .bos-burger__text{display:none}
  .bos-footer__inner{grid-template-columns:1fr;gap:28px}
  .bos-footer__nav{grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}
  .bos-footer__base{flex-direction:column;align-items:flex-start}
  .bos-grid{grid-template-columns:repeat(6,minmax(0,1fr))}
}

@media (max-width:559.98px){
  .bos-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .bos-footer__nav{grid-template-columns:1fr}
  .bos-prose{font-size:16px}
}

/* ---------- 15. 减少动效 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms!important;
    animation-iteration-count:1!important;
    transition-duration:.001ms!important;
  }
  [data-reveal]{opacity:1;transform:none}
  .bos-dot{animation:none}
}