/* ============================================================
   BSPORT赛场 — 共享外壳 /assets/site.css
   夜光蓝打底 · 荧光绿行动 · 暖橙数据
   ============================================================ */

/* -------- 1. 变量与令牌 -------- */
:root{
  --bs-night:#0A1A2F;
  --bs-ink:#06111D;
  --bs-panel:#102A46;
  --bs-line:#163E63;
  --bs-action:#C6FF3D;
  --bs-data:#FF6B2C;
  --bs-text:#F4F7FB;
  --bs-muted:#A7B7C9;
  --bs-pitch:#1F6B4A;
  --bs-focus:#FFD166;

  --rail-w:264px;
  --dock-h:62px;
  --topbar-h:58px;
  --edge:clamp(18px,4vw,52px);
  --radius-cut:4px 26px 4px 26px;

  --font-display:"BSPORT Display Condensed","Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --font-body:"BSPORT Text","Noto Sans SC","HarmonyOS Sans SC","PingFang SC",sans-serif;
  --font-mono:"BSPORT Mono","JetBrains Mono","Roboto Mono",ui-monospace,monospace;

  --fs-hero:clamp(2.6rem,7vw,6.8rem);
  --fs-h2:clamp(1.8rem,3.4vw,3.2rem);
  --fs-h3:clamp(1.2rem,1.8vw,1.6rem);
  --fs-data:clamp(2.4rem,5vw,5rem);
  --fs-body:clamp(.95rem,1.05vw,1.08rem);
}

/* -------- 2. Reset 与中文排版 -------- */
*,*::before,*::after{box-sizing:border-box}
html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  overflow-x:clip;
}
body{
  margin:0;
  background:var(--bs-night);
  color:var(--bs-text);
  font-family:var(--font-body);
  font-size:var(--fs-body);
  font-weight:400;
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:clip;
}
h1,h2,h3,h4,h5{
  margin:0;
  font-family:var(--font-display);
  font-weight:900;
  line-height:1.06;
  letter-spacing:-.04em;
  text-wrap:balance;
}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
img,svg,video{max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer}
input,textarea,select{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--bs-focus);outline-offset:3px;border-radius:3px}
::selection{background:var(--bs-action);color:var(--bs-ink)}

.sr-only{
  position:absolute;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;
}

/* -------- 3. 头部外壳 -------- */
.site-header{position:relative;z-index:80}

.skip-link{
  position:fixed;top:0;left:0;z-index:200;
  transform:translateY(-140%);
  background:var(--bs-action);color:var(--bs-ink);
  padding:10px 20px;border-radius:0 0 12px 0;
  font-weight:800;font-size:.9rem;letter-spacing:.02em;
  transition:transform .2s ease;
}
.skip-link:focus{transform:translateY(0)}

/* 顶部滚动进度读条 */
.readout{
  position:fixed;top:0;left:0;right:0;height:3px;
  background:rgba(22,62,99,.55);
  z-index:150;pointer-events:none;
}
.readout-bar{
  display:block;height:100%;width:100%;
  transform:scaleX(0);transform-origin:0 50%;
  background:linear-gradient(90deg,var(--bs-action) 0%,var(--bs-action) 42%,var(--bs-data) 100%);
}

/* 移动端粘性顶栏 */
.topbar{display:none}
.topbar-brand{
  display:flex;align-items:center;gap:9px;min-width:0;
  color:var(--bs-text);
}
.topbar-brand-mark{
  display:grid;place-items:center;flex:none;
  width:28px;height:28px;
  background:var(--bs-action);color:var(--bs-ink);
  font-family:var(--font-display);font-weight:900;font-size:.86rem;letter-spacing:-.02em;
  clip-path:polygon(0 0,100% 0,100% 72%,74% 100%,0 100%);
}
.topbar-title{
  font-family:var(--font-display);font-weight:900;
  font-size:.94rem;letter-spacing:-.01em;line-height:1.2;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.nav-toggle{
  display:inline-flex;align-items:center;gap:9px;flex:none;
  padding:9px 14px;border-radius:999px;
  border:1px solid rgba(198,255,61,.34);
  background:rgba(16,42,70,.78);
  color:var(--bs-text);
  font-family:var(--font-mono);font-size:.74rem;letter-spacing:.1em;
  transition:border-color .2s,background .2s;
}
.nav-toggle:hover{border-color:var(--bs-action);background:rgba(198,255,61,.12)}
.nav-toggle-bars{position:relative;display:block;width:16px;height:10px;flex:none}
.nav-toggle-bars::before,
.nav-toggle-bars::after{
  content:"";position:absolute;left:0;width:100%;height:2px;
  background:var(--bs-action);border-radius:2px;
  transition:transform .24s ease;
}
.nav-toggle-bars::before{top:0}
.nav-toggle-bars::after{bottom:0}
.nav-toggle-text{white-space:nowrap}

/* 遮罩 */
.rail-scrim{display:none}

/* -------- 4. 侧边轨道导航 -------- */
.site-rail{
  position:fixed;top:0;left:0;bottom:0;width:var(--rail-w);
  z-index:160;
  display:flex;flex-direction:column;gap:20px;
  padding:24px 18px 20px;
  background:linear-gradient(180deg,#0C2138 0%,var(--bs-panel) 46%,var(--bs-ink) 100%);
  border-right:1px solid var(--bs-line);
  overflow-y:auto;
  overscroll-behavior:contain;
}
.site-rail::after{
  content:"";position:absolute;top:0;right:-1px;width:2px;height:34%;
  background:linear-gradient(180deg,var(--bs-action),rgba(198,255,61,0));
  pointer-events:none;
}

.rail-top{display:flex;align-items:flex-start;justify-content:space-between;gap:10px}

.rail-brand{
  display:flex;align-items:center;gap:12px;
  flex:1 1 auto;min-width:0;
  padding-bottom:16px;border-bottom:1px solid var(--bs-line);
}
.rail-brand-mark{
  display:grid;place-items:center;flex:none;
  width:38px;height:38px;
  background:var(--bs-action);color:var(--bs-ink);
  font-family:var(--font-display);font-weight:900;font-size:1.06rem;letter-spacing:-.03em;
  clip-path:polygon(0 0,100% 0,100% 72%,74% 100%,0 100%);
}
.rail-brand-copy{display:flex;flex-direction:column;gap:1px;min-width:0}
.rail-brand-name{
  font-family:var(--font-display);font-weight:900;
  font-size:1.02rem;letter-spacing:-.025em;line-height:1.2;color:var(--bs-text);
}
.rail-brand-tag{
  font-family:var(--font-mono);font-size:.66rem;
  letter-spacing:.24em;text-transform:uppercase;
  color:var(--bs-action);
}

.rail-close{display:none}
.rail-close-glyph{position:relative;display:block;width:12px;height:12px}
.rail-close-glyph::before,
.rail-close-glyph::after{
  content:"";position:absolute;top:5px;left:0;
  width:12px;height:2px;background:currentColor;border-radius:2px;
}
.rail-close-glyph::before{transform:rotate(45deg)}
.rail-close-glyph::after{transform:rotate(-45deg)}

.rail-nav{flex:1 1 auto}
.rail-list{display:flex;flex-direction:column;gap:2px}
.rail-link{
  display:flex;align-items:center;gap:12px;
  padding:10px 10px 10px 12px;
  border-left:2px solid transparent;
  color:var(--bs-muted);
  font-weight:600;font-size:.95rem;line-height:1.4;
  transition:color .2s,background .2s,border-color .2s;
}
.rail-link:hover{
  color:var(--bs-text);
  background:rgba(198,255,61,.06);
  border-left-color:rgba(198,255,61,.45);
}
.rail-index{
  font-family:var(--font-mono);font-size:.7rem;font-weight:700;
  letter-spacing:.06em;color:#2F5A80;
  transition:color .2s;
}
.rail-label{min-width:0}
.rail-link:hover .rail-index{color:var(--bs-muted)}
.rail-link[aria-current="page"]{
  color:var(--bs-text);
  background:linear-gradient(90deg,rgba(198,255,61,.18),rgba(198,255,61,0));
  border-left-color:var(--bs-action);
}
.rail-link[aria-current="page"] .rail-index{color:var(--bs-action)}
.rail-link[aria-current="page"] .rail-label{font-weight:800}

.rail-actions{
  margin-top:auto;
  display:flex;flex-direction:column;gap:10px;
  padding-top:16px;border-top:1px solid var(--bs-line);
}
.rail-cta{width:100%;justify-content:center}
.rail-sub{
  display:inline-flex;align-items:center;gap:7px;
  padding:6px 4px;color:var(--bs-text);
  font-size:.86rem;font-weight:600;
  transition:color .2s;
}
.rail-sub::before{
  content:"";display:block;width:10px;height:2px;
  background:var(--bs-action);border-radius:2px;
}
.rail-sub:hover{color:var(--bs-action)}
.rail-support{
  font-size:.72rem;line-height:1.65;
  color:var(--bs-muted);letter-spacing:.01em;
}

/* -------- 5. 底部遥控器快捷条 -------- */
.dock{display:none}

/* -------- 6. 页脚 -------- */
.site-footer{
  position:relative;
  isolation:isolate;
  overflow:hidden;
  background:var(--bs-ink);
  border-top:1px solid var(--bs-line);
  padding-top:clamp(42px,6vw,80px);
}
.site-footer::before{
  content:"";position:absolute;inset:0;z-index:-1;pointer-events:none;
  background:
    radial-gradient(130% 78% at 88% -6%,rgba(198,255,61,.12),transparent 62%),
    radial-gradient(90% 60% at 6% 108%,rgba(255,107,44,.10),transparent 60%),
    repeating-linear-gradient(115deg,rgba(31,107,74,.20) 0 2px,transparent 2px 10px);
}
.site-footer::after{
  content:"";position:absolute;top:0;left:0;right:0;height:2px;
  background:linear-gradient(90deg,var(--bs-action),var(--bs-data) 54%,transparent 92%);
  pointer-events:none;
}
.footer-inner{
  position:relative;z-index:1;
  max-width:1200px;margin:0 auto;
  padding-inline:var(--edge);
}

.footer-head{
  display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;
  gap:20px 34px;
  padding-bottom:clamp(26px,4vw,44px);
  border-bottom:1px solid var(--bs-line);
}
.footer-head-copy{flex:1 1 320px;min-width:0}
.footer-kicker{
  font-family:var(--font-mono);font-size:.72rem;font-weight:700;
  letter-spacing:.26em;text-transform:uppercase;
  color:var(--bs-action);margin-bottom:12px;
}
.footer-line{
  font-family:var(--font-display);font-weight:900;
  font-size:clamp(1.45rem,3.1vw,2.5rem);
  line-height:1.18;letter-spacing:-.035em;
  max-width:26ch;color:var(--bs-text);
}

.footer-cols{
  display:grid;
  grid-template-columns:1.25fr 1fr 1.35fr;
  gap:clamp(24px,4vw,56px);
  padding-block:clamp(28px,4vw,48px);
}
.footer-col{min-width:0}
.footer-col-title{
  font-family:var(--font-mono);font-size:.7rem;font-weight:700;
  letter-spacing:.22em;text-transform:uppercase;
  color:rgba(167,183,201,.66);
  margin-bottom:14px;
}

.footer-brand{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--font-display);font-weight:900;
  font-size:clamp(1.3rem,2.2vw,1.6rem);letter-spacing:-.03em;
  color:var(--bs-text);margin-bottom:14px;
}
.footer-brand-mark{
  display:grid;place-items:center;flex:none;
  width:34px;height:34px;
  background:var(--bs-action);color:var(--bs-ink);
  font-size:.94rem;letter-spacing:-.02em;
  clip-path:polygon(0 0,100% 0,100% 72%,74% 100%,0 100%);
}

.footer-list{display:flex;flex-direction:column;gap:9px}
.footer-link{
  display:inline-block;
  color:var(--bs-muted);font-size:.94rem;
  transition:color .2s,transform .2s;
}
.footer-link:hover{color:var(--bs-action);transform:translateX(3px)}
.footer-link[aria-current="page"]{color:var(--bs-action);font-weight:700}

.footer-contact{display:flex;flex-direction:column;gap:13px}
.footer-contact-item{margin:0}
.footer-contact-label{
  display:block;
  font-family:var(--font-mono);font-size:.66rem;font-weight:700;
  letter-spacing:.18em;text-transform:uppercase;
  color:rgba(167,183,201,.62);margin-bottom:2px;
}
.footer-contact-value{
  display:block;
  font-size:.94rem;line-height:1.6;color:var(--bs-text);
  overflow-wrap:anywhere;
}
.footer-note{
  margin-top:14px;
  font-size:.78rem;line-height:1.75;
  color:var(--bs-muted);max-width:36ch;
  overflow-wrap:anywhere;
}

.footer-base{
  display:flex;flex-wrap:wrap;align-items:center;
  gap:10px 26px;
  padding-block:18px 26px;
  border-top:1px solid var(--bs-line);
  font-size:.8rem;color:var(--bs-muted);
}
.footer-copy{
  font-family:var(--font-mono);letter-spacing:.02em;
  font-variant-numeric:tabular-nums;
}
.footer-icp{letter-spacing:.02em}
.footer-legal{
  display:flex;flex-wrap:wrap;gap:8px 18px;
  margin-left:auto;
}
.footer-legal .footer-link{font-size:.8rem}

/* -------- 7. 正文容器与栅格 -------- */
#main-content{scroll-margin-top:12px}
.content{
  width:100%;max-width:1200px;margin:0 auto;
  padding-inline:var(--edge);
}
.section{padding-block:clamp(40px,6vw,84px)}
.section-head{
  display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;
  gap:14px 28px;margin-bottom:clamp(22px,3vw,38px);
}
.section-title{font-size:var(--fs-h2)}
.section-lede{
  max-width:56ch;color:var(--bs-muted);
  font-size:.98rem;line-height:1.8;
}
.eyebrow{
  display:inline-flex;align-items:center;gap:9px;
  font-family:var(--font-mono);font-size:.72rem;font-weight:700;
  letter-spacing:.24em;text-transform:uppercase;
  color:var(--bs-action);margin-bottom:12px;
}
.eyebrow::before{
  content:"";display:block;width:22px;height:2px;
  background:var(--bs-action);border-radius:2px;
}
.layout-grid{display:grid;gap:clamp(16px,2.4vw,28px)}
.stack{display:flex;flex-direction:column;gap:clamp(12px,2vw,20px)}
@media (min-width:720px){
  .layout-grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (min-width:960px){
  .layout-grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
}

/* -------- 8. 通用组件 -------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:999px;
  border:1px solid transparent;
  font-family:var(--font-body);font-size:.9rem;font-weight:800;
  letter-spacing:.02em;line-height:1.2;
  transition:transform .18s ease,background .2s,border-color .2s,color .2s,box-shadow .2s;
}
.btn:hover{transform:translateY(-1px)}
.btn:active{transform:translateY(0)}
.btn-action{
  background:var(--bs-action);color:var(--bs-ink);
  box-shadow:0 6px 22px rgba(198,255,61,.2);
}
.btn-action:hover{background:#d5ff6b;box-shadow:0 10px 26px rgba(198,255,61,.28)}
.btn-ghost{
  background:transparent;color:var(--bs-action);
  border-color:rgba(198,255,61,.5);
}
.btn-ghost:hover{background:rgba(198,255,61,.12);border-color:var(--bs-action)}

.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 11px;border-radius:999px;
  font-family:var(--font-body);font-size:.72rem;font-weight:700;
  letter-spacing:.06em;line-height:1.6;
}
.tag-action{background:rgba(198,255,61,.16);color:var(--bs-action);border:1px solid rgba(198,255,61,.34)}
.tag-data{background:rgba(255,107,44,.14);color:var(--bs-data);border:1px solid rgba(255,107,44,.36)}

.stat{display:flex;flex-direction:column;gap:4px}
.stat-value{
  font-family:var(--font-mono);font-weight:800;
  font-size:var(--fs-data);line-height:1;letter-spacing:-.02em;
  color:var(--bs-text);font-variant-numeric:tabular-nums;
}
.stat-value--action{color:var(--bs-action)}
.stat-value--data{color:var(--bs-data)}
.stat-label{
  font-size:.78rem;letter-spacing:.08em;
  color:var(--bs-muted);
}

.panel{
  background:linear-gradient(160deg,rgba(16,42,70,.94),rgba(10,26,47,.94));
  border:1px solid var(--bs-line);
  border-radius:var(--radius-cut);
  padding:clamp(18px,2.4vw,28px);
}
.panel-head{
  display:flex;align-items:baseline;justify-content:space-between;
  gap:12px;margin-bottom:14px;padding-bottom:12px;
  border-bottom:1px solid var(--bs-line);
}

.rule{
  height:1px;border:0;margin:0;
  background:linear-gradient(90deg,var(--bs-line),rgba(22,62,99,0));
}
.link-arrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:.9rem;font-weight:700;color:var(--bs-action);
  transition:color .2s;
}
.link-arrow::after{content:"→";transition:transform .2s ease}
.link-arrow:hover::after{transform:translateX(4px)}

.breadcrumbs{
  display:flex;flex-wrap:wrap;gap:8px;
  font-size:.82rem;color:var(--bs-muted);
}
.breadcrumbs ol{display:flex;flex-wrap:wrap;gap:8px}
.breadcrumbs a{color:var(--bs-muted);transition:color .2s}
.breadcrumbs a:hover{color:var(--bs-action)}
.breadcrumbs li:not(:last-child)::after{
  content:"/";margin-left:8px;color:rgba(22,62,99,.95);
}
.breadcrumbs [aria-current="page"]{color:var(--bs-text);font-weight:700}

/* -------- 9. 图片容器基础规则 -------- */
.media-frame{
  position:relative;overflow:hidden;isolation:isolate;
  aspect-ratio:16/10;
  border:1px solid var(--bs-line);
  border-radius:var(--radius-cut);
  background:linear-gradient(150deg,#123152 0%,#071523 100%);
}
.media-frame>img{
  display:block;width:100%;height:100%;
  object-fit:cover;object-position:center;
}
.media-frame::after{
  content:"";position:absolute;inset:0;z-index:1;pointer-events:none;
  background-image:
    linear-gradient(rgba(198,255,61,.12) 1px,transparent 1px),
    linear-gradient(90deg,rgba(198,255,61,.12) 1px,transparent 1px);
  background-size:36px 36px;
  opacity:.28;
}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--tall{aspect-ratio:3/4}
.media-caption{
  margin-top:10px;
  font-size:.78rem;line-height:1.7;color:var(--bs-muted);
}

/* -------- 10. 断点：平板与移动端 -------- */
@media (max-width:1023px){
  .readout{left:0}

  .topbar{
    display:flex;align-items:center;justify-content:space-between;
    gap:12px;
    position:sticky;top:0;z-index:140;
    height:var(--topbar-h);
    padding-inline:var(--edge);
    background:rgba(6,17,29,.94);
    backdrop-filter:blur(12px);
    -webkit-backdrop-filter:blur(12px);
    border-bottom:1px solid var(--bs-line);
  }

  .rail-scrim{
    display:block;
    position:fixed;inset:0;z-index:155;
    background:rgba(3,9,16,.72);
    opacity:0;pointer-events:none;
    transition:opacity .3s ease;
  }
  .rail-scrim[data-open="true"]{opacity:1;pointer-events:auto}

  .site-rail{
    width:min(84vw,318px);
    padding:20px 16px 18px;
    z-index:165;
    transform:translateX(-104%);
    transition:transform .34s cubic-bezier(.4,0,.2,1);
    box-shadow:24px 0 64px rgba(0,0,0,.55);
  }
  .site-rail[data-open="true"]{transform:translateX(0)}

  .rail-close{
    display:inline-flex;align-items:center;justify-content:center;flex:none;
    width:34px;height:34px;border-radius:50%;
    border:1px solid var(--bs-line);
    color:var(--bs-text);
    transition:border-color .2s,background .2s,color .2s;
  }
  .rail-close:hover{border-color:var(--bs-action);background:rgba(198,255,61,.12);color:var(--bs-action)}

  .dock{
    display:grid;
    grid-template-columns:repeat(5,1fr);
    position:fixed;left:0;right:0;bottom:0;z-index:135;
    height:calc(var(--dock-h) + env(safe-area-inset-bottom,0px));
    padding-bottom:env(safe-area-inset-bottom,0px);
    background:rgba(6,17,29,.95);
    backdrop-filter:blur(14px);
    -webkit-backdrop-filter:blur(14px);
    border-top:1px solid var(--bs-line);
  }
  .dock-item{
    display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;
    color:var(--bs-muted);
    font-size:.68rem;font-weight:700;letter-spacing:.06em;
    transition:color .2s;
  }
  .dock-item:hover{color:var(--bs-text)}
  .dock-dot{
    width:16px;height:3px;border-radius:2px;
    background:currentColor;opacity:.5;
    transition:opacity .2s,width .2s;
  }
  .dock-item[aria-current="page"]{color:var(--bs-action)}
  .dock-item[aria-current="page"] .dock-dot{opacity:1;width:22px}
  .dock-label{line-height:1}

  #main-content{padding-bottom:calc(var(--dock-h) + 20px)}
  .site-footer{padding-bottom:calc(var(--dock-h) + 16px)}

  .footer-legal{margin-left:0}
}

@media (max-width:900px){
  .footer-cols{grid-template-columns:1fr 1fr}
}

@media (max-width:620px){
  .footer-cols{grid-template-columns:1fr}
  .footer-head{align-items:flex-start}
  .footer-base{gap:8px 18px}
  .footer-legal{margin-left:0;width:100%}
}

/* -------- 11. 桌面端：内容右移，形成看台边缘感 -------- */
@media (min-width:1024px){
  .readout{left:var(--rail-w)}
  #main-content{margin-left:var(--rail-w)}
  .site-footer{margin-left:var(--rail-w)}
}

/* -------- 12. 动效降级 -------- */
.motion-ready [data-reveal]{
  opacity:0;transform:translateY(16px);
  transition:opacity .5s ease,transform .55s cubic-bezier(.2,.7,.3,1);
  will-change:opacity,transform;
}
.motion-ready [data-reveal].is-inview{opacity:1;transform: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;
  }
  .motion-ready [data-reveal]{opacity:1;transform:none}
  .btn:hover,.footer-link:hover{transform:none}
}