/* ============================================================
   博奥体育 / route-boao.com.cn
   共享样式表 site.css
   夜战战术室 · 边线灯光 · 切角与轨迹
   ============================================================ */

/* ---------- 1. 变量 ---------- */
:root{
  --ink-900:#071F1A;
  --ink-800:#0C2B24;
  --ink-700:#123A31;
  --cyan:#35F2D0;
  --orange:#FF9A3C;
  --text:#D6E4DD;
  --muted:#8FA79E;
  --indigo:#1B1B3A;
  --wine:#4A1E2B;
  --paper:#F2F7F4;
  --paper-ink:#0B1F1A;

  --line:rgba(53,242,208,.22);
  --line-soft:rgba(214,228,221,.12);
  --line-strong:rgba(53,242,208,.45);

  --rail-w:266px;
  --bar-h:64px;
  --gutter:clamp(18px,4.2vw,54px);
  --max:1140px;

  --font-display:"Arial Narrow","Helvetica Neue Condensed","Roboto Condensed","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-body:system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans CJK SC",sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,"Liberation Mono",monospace;

  --ease:cubic-bezier(.22,.72,.28,1);
  --t:180ms;
  --t-slow:220ms;

  --cut:20px;
}

/* ---------- 2. Reset ---------- */
*,*::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{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}

/* ---------- 3. 基础排版 ---------- */
body{
  min-height:100vh;
  font-family:var(--font-body);
  font-size:clamp(15px,.35vw + 14px,17px);
  line-height:1.78;
  color:var(--text);
  background-color:var(--ink-900);
  background-image:
    radial-gradient(115% 72% at 88% -10%, rgba(53,242,208,.085), transparent 62%),
    radial-gradient(85% 60% at 2% 106%, rgba(255,154,60,.06), transparent 60%);
  background-attachment:fixed;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background-image:
    repeating-linear-gradient(115deg, rgba(214,228,221,.028) 0 1px, transparent 1px 96px);
  opacity:.9;
}

h1,h2,h3,h4,h5{
  font-family:var(--font-display);
  font-weight:800;
  line-height:1.12;
  letter-spacing:-.012em;
  color:var(--text);
}
h1{font-size:clamp(30px,5vw,56px)}
h2{font-size:clamp(24px,3.2vw,40px)}
h3{font-size:clamp(19px,2vw,28px)}
h4{font-size:clamp(17px,1.4vw,20px);letter-spacing:.01em}

p{margin:0 0 1em}
p:last-child{margin-bottom:0}

strong{color:#fff;font-weight:700}

a{text-decoration-thickness:1px;text-underline-offset:3px}

/* ---------- 4. 可访问性工具 ---------- */
.sr-only{
  position:absolute;
  width:1px;height:1px;
  padding:0;margin:-1px;
  overflow:hidden;
  clip:rect(0,0,0,0);
  clip-path:inset(50%);
  white-space:nowrap;
  border:0;
}

.skip-link{
  position:fixed;
  top:10px;
  left:12px;
  z-index:200;
  padding:10px 18px;
  font-family:var(--font-display);
  font-weight:800;
  font-size:14px;
  letter-spacing:.08em;
  color:var(--ink-900);
  background:var(--cyan);
  text-decoration:none;
  clip-path:polygon(0 0,100% 0,100% calc(100% - 10px),calc(100% - 10px) 100%,0 100%);
  transform:translateY(-160%);
  transition:transform var(--t) var(--ease);
}
.skip-link:focus{transform:translateY(0)}

:where(a,button,[tabindex],summary):focus-visible{
  outline:2px solid var(--cyan);
  outline-offset:3px;
  border-radius:2px;
}

/* ---------- 5. 滚动进度 ---------- */
.scroll-progress{
  position:fixed;
  top:0;
  left:var(--rail-w);
  right:0;
  height:3px;
  z-index:95;
  background:rgba(7,31,26,.55);
  pointer-events:none;
}
.scroll-progress__bar{
  display:block;
  width:0;
  height:100%;
  background:linear-gradient(90deg,var(--cyan),#5FF0D6 55%,var(--orange));
  box-shadow:0 0 12px rgba(53,242,208,.55);
  transition:width 90ms linear;
}

/* ---------- 6. 头部轨道 ---------- */
.site-rail{
  position:fixed;
  inset:0 auto 0 0;
  width:var(--rail-w);
  z-index:80;
  display:flex;
  flex-direction:column;
  padding:0;
  overflow-y:auto;
  overscroll-behavior:contain;
  background:
    linear-gradient(180deg,var(--ink-800) 0%,#0A2721 55%,var(--ink-900) 100%);
  border-right:1px solid var(--line-soft);
}
.site-rail::before{
  content:"";
  position:absolute;
  top:0;right:-1px;
  width:2px;height:100%;
  background:linear-gradient(180deg,var(--cyan) 0%,rgba(53,242,208,.12) 42%,rgba(255,154,60,.55) 100%);
  opacity:.5;
  pointer-events:none;
}
.site-rail::after{
  content:"";
  position:absolute;
  top:0;right:0;
  width:74px;height:74px;
  background:linear-gradient(225deg,rgba(53,242,208,.16),transparent 62%);
  clip-path:polygon(100% 0,100% 100%,0 0);
  pointer-events:none;
}

.rail__top{
  position:relative;
  display:flex;
  align-items:flex-start;
  justify-content:space-between;
  gap:12px;
  padding:30px 22px 20px;
  z-index:2;
}

.brand{
  display:flex;
  align-items:center;
  gap:11px;
  text-decoration:none;
  color:var(--text);
}
.brand__mark{
  flex:none;
  width:26px;height:26px;
  background:var(--cyan);
  clip-path:polygon(0 0,68% 0,100% 32%,100% 100%,32% 100%,0 68%);
  box-shadow:0 0 0 3px rgba(53,242,208,.12);
  transition:background var(--t) var(--ease),transform var(--t) var(--ease);
}
.brand:hover .brand__mark{background:var(--orange);transform:rotate(6deg)}
.brand__text{display:block}
.brand__name{
  display:block;
  font-family:var(--font-display);
  font-weight:800;
  font-size:19px;
  letter-spacing:.08em;
  line-height:1.1;
  color:#fff;
}
.brand__latin{
  display:block;
  margin-top:4px;
  font-family:var(--font-mono);
  font-size:9.5px;
  letter-spacing:.3em;
  color:var(--muted);
  text-transform:uppercase;
}

/* 汉堡 */
.nav-toggle{
  display:none;
  align-items:center;
  justify-content:center;
  width:44px;height:44px;
  flex:none;
  cursor:pointer;
  color:var(--text);
  background:rgba(53,242,208,.06);
  border:1px solid var(--line);
  clip-path:polygon(0 0,100% 0,100% calc(100% - 10px),calc(100% - 10px) 100%,0 100%);
  transition:background var(--t) var(--ease),border-color var(--t) var(--ease);
}
.nav-toggle:hover{background:rgba(53,242,208,.14);border-color:var(--line-strong)}
.nav-toggle__box{display:flex;flex-direction:column;gap:5px;width:20px}
.nav-toggle__box span{
  display:block;
  height:2px;
  background:var(--cyan);
  transform-origin:center;
  transition:transform var(--t) var(--ease),opacity var(--t) var(--ease);
}

/* 导航 */
.rail__nav{
  position:relative;
  flex:1 1 auto;
  padding:4px 12px 26px;
}
.rail__eyebrow{
  margin:0 0 12px;
  padding-left:10px;
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.24em;
  text-transform:uppercase;
  color:var(--muted);
}
.nav-list{display:flex;flex-direction:column;gap:2px}
.nav-list__item + .nav-list__item{border-top:1px solid rgba(214,228,221,.07)}

.nav-link{
  position:relative;
  display:flex;
  align-items:baseline;
  gap:12px;
  padding:12px 12px 12px 22px;
  color:var(--text);
  text-decoration:none;
  transition:background var(--t) var(--ease),color var(--t) var(--ease),padding-left var(--t) var(--ease);
}
.nav-link::before{
  content:"";
  position:absolute;
  left:6px;
  top:50%;
  width:6px;height:8px;
  margin-top:-4px;
  background:var(--muted);
  opacity:.55;
  clip-path:polygon(0 0,100% 50%,0 100%);
  transition:width var(--t) var(--ease),background var(--t) var(--ease),opacity var(--t) var(--ease),left var(--t) var(--ease);
}
.nav-link__idx{
  flex:none;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.06em;
  color:var(--muted);
  transition:color var(--t) var(--ease);
}
.nav-link__label{
  font-family:var(--font-display);
  font-weight:700;
  font-size:15.5px;
  letter-spacing:.05em;
}
.nav-link:hover,
.nav-link:focus-visible{
  background:linear-gradient(90deg,rgba(53,242,208,.11),transparent 82%);
  color:#fff;
}
.nav-link:hover::before,
.nav-link:focus-visible::before{
  left:4px;
  width:11px;
  background:var(--cyan);
  opacity:1;
}
.nav-link:hover .nav-link__idx{color:var(--cyan)}

.nav-link[aria-current="page"]{
  background:linear-gradient(90deg,rgba(255,154,60,.16),rgba(255,154,60,.02) 88%);
  color:#fff;
}
.nav-link[aria-current="page"]::before{
  left:4px;
  width:12px;
  background:var(--orange);
  opacity:1;
}
.nav-link[aria-current="page"] .nav-link__idx{color:var(--orange)}

.rail__meta{
  margin:24px 10px 0;
  padding-top:16px;
  border-top:1px dashed var(--line-soft);
  font-family:var(--font-mono);
  font-size:11px;
  line-height:1.7;
  letter-spacing:.06em;
  color:var(--muted);
}

/* 悬浮入口 */
.tablet-cta{
  display:block;
  margin:0 22px 26px;
  padding:13px 16px;
  font-family:var(--font-display);
  font-weight:800;
  font-size:14px;
  letter-spacing:.1em;
  text-align:center;
  text-decoration:none;
  color:var(--ink-900);
  background:var(--orange);
  clip-path:polygon(0 0,100% 0,100% calc(100% - 12px),calc(100% - 12px) 100%,0 100%);
  transition:background var(--t) var(--ease),transform var(--t) var(--ease),box-shadow var(--t) var(--ease);
}
.tablet-cta:hover,
.tablet-cta:focus-visible{
  background:#FFB05F;
  transform:translateY(-2px);
  box-shadow:0 10px 22px rgba(255,154,60,.22);
}

/* ---------- 7. 通用内容组件 ---------- */
.wrap{
  width:100%;
  max-width:var(--max);
  margin-inline:auto;
  padding-inline:var(--gutter);
}

.section{padding-block:clamp(30px,5vw,72px)}
.section--tight{padding-block:clamp(20px,3vw,40px)}

.kicker{
  display:inline-flex;
  align-items:center;
  gap:10px;
  margin-bottom:14px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.26em;
  text-transform:uppercase;
  color:var(--cyan);
}
.kicker::before{
  content:"";
  width:22px;height:1px;
  background:var(--cyan);
}

.num{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  letter-spacing:.02em;
}

.rule{
  height:1px;
  margin-block:clamp(22px,4vw,46px);
  border:0;
  background:linear-gradient(90deg,var(--line),rgba(255,154,60,.18) 46%,transparent 88%);
}

.btn{
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:13px 24px;
  font-family:var(--font-display);
  font-weight:800;
  font-size:14px;
  letter-spacing:.09em;
  text-decoration:none;
  color:var(--ink-900);
  background:var(--cyan);
  clip-path:polygon(0 0,100% 0,100% calc(100% - 12px),calc(100% - 12px) 100%,0 100%);
  transition:background var(--t) var(--ease),transform var(--t) var(--ease),color var(--t) var(--ease);
}
.btn:hover,.btn:focus-visible{background:#66F7DC;transform:translateY(-2px)}

.btn--ghost{
  color:var(--text);
  background:transparent;
  box-shadow:inset 0 0 0 1px var(--line);
  clip-path:none;
}
.btn--ghost:hover,.btn--ghost:focus-visible{
  color:#fff;
  background:rgba(53,242,208,.10);
  box-shadow:inset 0 0 0 1px var(--line-strong);
}

.panel{
  position:relative;
  padding:clamp(18px,2.4vw,28px);
  background:linear-gradient(160deg,var(--ink-800),rgba(12,43,36,.72));
  border:1px solid var(--line-soft);
  clip-path:polygon(0 0,calc(100% - var(--cut)) 0,100% var(--cut),100% 100%,0 100%);
  transition:background var(--t-slow) var(--ease),border-color var(--t-slow) var(--ease),transform var(--t-slow) var(--ease);
}
.panel:hover{
  background:linear-gradient(160deg,#10362E,rgba(16,54,46,.86));
  border-color:var(--line);
  transform:translateY(-2px);
}
.panel--wine{border-color:rgba(255,154,60,.28);background:linear-gradient(160deg,var(--wine),rgba(74,30,43,.7))}
.panel--indigo{border-color:rgba(53,242,208,.2);background:linear-gradient(160deg,var(--indigo),rgba(27,27,58,.72))}

.grid{display:grid;gap:clamp(16px,2.4vw,30px)}
.grid--2{grid-template-columns:repeat(auto-fit,minmax(min(100%,268px),1fr))}
.grid--split{grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr)}
@media (max-width:880px){
  .grid--split{grid-template-columns:minmax(0,1fr)}
}

/* 面包屑 */
.breadcrumb{margin-bottom:clamp(16px,2.4vw,28px)}
.breadcrumb__list{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:var(--muted)}
.breadcrumb__list li + li::before{content:"/";margin-right:8px;color:rgba(143,167,158,.5)}
.breadcrumb__link{color:var(--muted);text-decoration:none;transition:color var(--t) var(--ease)}
.breadcrumb__link:hover,.breadcrumb__link:focus-visible{color:var(--cyan)}

/* 图片容器基础规则（页面阶段放置 <img>） */
.media{
  position:relative;
  display:block;
  width:100%;
  overflow:hidden;
  aspect-ratio:16/9;
  background:var(--ink-700);
  clip-path:polygon(0 0,calc(100% - 22px) 0,100% 22px,100% 100%,0 100%);
}
.media img{
  width:100%;height:100%;
  object-fit:cover;
  filter:saturate(.7) contrast(1.06) brightness(.92);
  transition:transform var(--t-slow) var(--ease),filter var(--t-slow) var(--ease);
}
.media:hover img{transform:scale(1.03);filter:saturate(.92) contrast(1.08) brightness(1)}
.media--wide{aspect-ratio:21/9}
.media--square{aspect-ratio:1/1}
.media--tall{aspect-ratio:4/5}
.media__caption{
  position:absolute;
  inset:auto 0 0 0;
  padding:10px 14px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.07em;
  color:var(--text);
  background:linear-gradient(0deg,rgba(7,31,26,.94),rgba(7,31,26,0));
}

/* 纸白阅读面（法规类页面可用） */
.paper{background:var(--paper);color:var(--paper-ink)}
.paper h1,.paper h2,.paper h3,.paper h4{color:var(--paper-ink)}
.paper a{color:#0E4C3E}

/* ---------- 8. 页脚 ---------- */
.site-foot{
  position:relative;
  z-index:1;
  margin-top:clamp(40px,7vw,90px);
  padding:clamp(38px,5.4vw,68px) var(--gutter) 26px;
  background:linear-gradient(180deg,var(--ink-800),#08211C 82%);
  border-top:1px solid var(--line-soft);
  overflow:hidden;
}
.site-foot::before{
  content:"";
  position:absolute;
  top:0;left:0;right:0;
  height:1px;
  background:linear-gradient(90deg,var(--cyan) 0%,rgba(53,242,208,.16) 38%,var(--orange) 100%);
  opacity:.85;
}
.site-foot::after{
  content:"";
  position:absolute;
  right:-6%;bottom:-58%;
  width:min(560px,70vw);
  height:300px;
  background:repeating-linear-gradient(102deg,rgba(53,242,208,.055) 0 1px,transparent 1px 26px);
  transform:skewY(-6deg);
  pointer-events:none;
}

.foot__grid{
  position:relative;
  z-index:1;
  max-width:var(--max);
  margin-inline:auto;
  display:grid;
  grid-template-columns:minmax(0,1.5fr) minmax(0,.9fr) minmax(0,1.15fr);
  gap:clamp(24px,4vw,58px);
}

.foot__col{min-width:0}
.foot__col--brand{max-width:34ch}

.foot__brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-display);
  font-weight:800;
  font-size:23px;
  letter-spacing:.12em;
  color:#fff;
  text-decoration:none;
}
.foot__brand::before{
  content:"";
  width:12px;height:12px;
  background:var(--orange);
  transform:skewX(-14deg);
  transition:background var(--t) var(--ease);
}
.foot__brand:hover::before{background:var(--cyan)}

.foot__desc{
  margin-top:14px;
  font-size:14px;
  line-height:1.85;
  color:var(--muted);
}

.foot__title{
  margin-bottom:16px;
  font-family:var(--font-mono);
  font-size:10.5px;
  font-weight:400;
  letter-spacing:.26em;
  text-transform:uppercase;
  color:var(--cyan);
}

.foot__links{display:flex;flex-direction:column;gap:9px;font-size:14.5px}
.foot__links a{
  color:var(--text);
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color var(--t) var(--ease),border-color var(--t) var(--ease);
}
.foot__links a:hover,
.foot__links a:focus-visible{color:var(--cyan);border-bottom-color:var(--cyan)}

.foot__links--meta{color:var(--muted);font-size:13.5px;line-height:1.7}
.foot__links--meta li{display:flex;flex-wrap:wrap;gap:8px}
.foot__key{
  flex:none;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.12em;
  color:rgba(143,167,158,.78);
  padding-top:2px;
}

.foot__base{
  position:relative;
  z-index:1;
  max-width:var(--max);
  margin:clamp(28px,4vw,48px) auto 0;
  padding-top:18px;
  border-top:1px solid var(--line-soft);
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px 26px;
  font-size:13px;
  color:var(--muted);
}
.foot__legal{margin:0;letter-spacing:.02em}
.foot__year{font-family:var(--font-mono)}

.foot__pol{display:flex;flex-wrap:wrap;gap:18px;margin-left:auto}
.foot__pol a{
  color:var(--muted);
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color var(--t) var(--ease),border-color var(--t) var(--ease);
}
.foot__pol a:hover,
.foot__pol a:focus-visible{color:var(--cyan);border-bottom-color:var(--cyan)}

.foot__icp{
  margin:0;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:rgba(143,167,158,.85);
}

/* ---------- 9. 桌面分屏偏移 ---------- */
@media (min-width:901px){
  body{padding-left:var(--rail-w)}
}

/* ---------- 10. 移动 / 平板 ---------- */
@media (max-width:900px){
  body::before{opacity:.55}

  .site-rail{
    position:sticky;
    inset:0 0 auto 0;
    width:auto;
    height:var(--bar-h);
    flex-direction:row;
    align-items:center;
    overflow:visible;
    background:#0A2721;
    border-right:0;
    border-bottom:1px solid var(--line-soft);
    box-shadow:0 8px 24px rgba(0,0,0,.32);
  }
  .site-rail::before{display:none}
  .site-rail::after{
    top:0;right:0;
    width:52px;height:52px;
    opacity:.7;
  }

  .rail__top{
    flex:1 1 auto;
    align-items:center;
    padding:0 var(--gutter);
    height:var(--bar-h);
    gap:16px;
  }
  .brand__name{font-size:17px}
  .brand__latin{font-size:9px;letter-spacing:.26em;margin-top:2px}
  .brand__mark{width:22px;height:22px}

  .nav-toggle{display:inline-flex;position:relative;z-index:2}

  .rail__nav{
    position:fixed;
    inset:var(--bar-h) 0 0 0;
    z-index:1;
    padding:22px var(--gutter) 130px;
    overflow-y:auto;
    background:
      radial-gradient(110% 60% at 90% -6%, rgba(53,242,208,.09), transparent 60%),
      var(--ink-900);
    border-top:1px solid var(--line-soft);
    opacity:0;
    visibility:hidden;
    transform:translateY(-12px);
    transition:opacity var(--t) var(--ease),transform var(--t) var(--ease),visibility 0s linear var(--t);
  }
  .site-rail[data-open] .rail__nav{
    opacity:1;
    visibility:visible;
    transform:translateY(0);
    transition-delay:0s;
  }

  .rail__eyebrow{
    padding-left:2px;
    margin-bottom:14px;
    font-size:11px;
  }
  .nav-list{gap:0}
  .nav-link{
    padding:16px 12px 16px 26px;
    font-size:17px;
  }
  .nav-link__label{font-size:18px}
  .nav-link__idx{font-size:12px}

  .rail__meta{
    margin:26px 2px 0;
    padding-top:18px;
    font-size:11.5px;
  }

  .site-rail[data-open] .nav-toggle__box span:first-child{transform:translateY(3.5px) rotate(45deg)}
  .site-rail[data-open] .nav-toggle__box span:last-child{transform:translateY(-3.5px) rotate(-45deg)}

  .tablet-cta{
    position:fixed;
    left:auto;
    right:16px;
    bottom:16px;
    z-index:90;
    margin:0;
    padding:12px 20px;
    font-size:13.5px;
    box-shadow:0 12px 26px rgba(0,0,0,.45);
  }

  html.nav-open,
  html.nav-open body{overflow:hidden}

  .scroll-progress{left:0}

  .foot__grid{grid-template-columns:minmax(0,1fr) minmax(0,1fr)}
  .foot__col--brand{grid-column:1 / -1;max-width:none}
}

@media (max-width:560px){
  .foot__grid{grid-template-columns:minmax(0,1fr)}
  .foot__col--brand{grid-column:auto}
  .foot__pol{margin-left:0;width:100%}
  .foot__base{gap:8px 18px}
}

/* ---------- 11. 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;
    scroll-behavior:auto !important;
  }
  .panel:hover,
  .btn:hover,
  .tablet-cta:hover{transform:none}
  .media:hover img{transform:none}
}