/* ==========================================================================
   博万体育 · 共享站点样式  /assets/site.css
   深靛蓝底 · 蓝图网格 · 等宽索引 · 荧光青柠状态色
   ========================================================================== */

/* ---------- 1. 设计令牌 ---------- */
:root{
  --c-ink:#0B1436;
  --c-carbon:#12161C;
  --c-night:#1B2650;
  --c-panel:#171F3D;
  --c-lime:#C6F24A;
  --c-amber:#FF7A2F;
  --c-copper:#B5603A;
  --c-signal:#3ECF8E;
  --c-fog:#F2F4F8;
  --c-index:#8A94A8;

  --font-display:"Arial Narrow","Helvetica Neue Condensed","Source Han Sans SC","Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --font-body:"Source Han Sans SC","Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:"JetBrains Mono","SFMono-Regular",Menlo,Consolas,"Courier New",monospace;

  --step-0:clamp(1rem,.95rem + .25vw,1.125rem);
  --step-1:clamp(1.2rem,1.1rem + .5vw,1.5rem);
  --step-2:clamp(1.6rem,1.35rem + 1.1vw,2.5rem);

  --line:rgba(138,148,168,.22);
  --line-soft:rgba(138,148,168,.14);
  --line-strong:rgba(138,148,168,.45);

  --maxw:1320px;
  --gutter:clamp(1.25rem,4vw,4.5rem);
  --radius:28px;
  --radius-sm:14px;
  --nav-break:960px;
}

/* ---------- 2. Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,p,figure,blockquote,dl,dd{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
button,input,select,textarea{font:inherit;color:inherit}
img,svg,video{display:block;max-width:100%}
a{color:inherit}
table{border-collapse:collapse;width:100%}

/* ---------- 3. 基础与中文排版 ---------- */
body{
  background-color:var(--c-ink);
  color:var(--c-fog);
  font-family:var(--font-body);
  font-size:var(--step-0);
  line-height:1.75;
  letter-spacing:.01em;
  min-height:100vh;
  -webkit-font-smoothing:antialiased;
}

@media (min-width:768px){
  body{
    background-image:
      linear-gradient(rgba(138,148,168,.055) 1px,transparent 1px),
      linear-gradient(90deg,rgba(138,148,168,.055) 1px,transparent 1px);
    background-size:112px 112px;
    background-attachment:fixed;
  }
}

/* 滚动进度：细线沿视口顶端生长 */
body::after{
  content:"";
  position:fixed;
  left:0;top:0;
  width:100%;height:2px;
  transform:scaleX(var(--progress,0));
  transform-origin:0 50%;
  background:linear-gradient(90deg,rgba(181,96,58,.95),var(--c-lime));
  pointer-events:none;
  z-index:80;
}

h1,.h1{
  font-family:var(--font-display);
  font-weight:300;
  font-size:clamp(2.6rem,7vw,6.5rem);
  line-height:1.02;
  letter-spacing:.04em;
  text-transform:uppercase;
  color:var(--c-fog);
}
h2,.h2{
  font-family:var(--font-display);
  font-weight:300;
  font-size:clamp(1.6rem,3.4vw,3rem);
  line-height:1.14;
  letter-spacing:.05em;
  color:var(--c-fog);
}
h3,.h3{
  font-family:var(--font-body);
  font-weight:500;
  font-size:clamp(1.12rem,1.6vw,1.5rem);
  line-height:1.42;
  letter-spacing:.01em;
}
h4,.h4{font-weight:500;font-size:1rem;line-height:1.5}
strong{font-weight:500;color:var(--c-fog)}

p{max-width:38em}
p+p{margin-top:1em}

.display-hero{
  font-family:var(--font-display);
  font-weight:200;
  font-size:clamp(3.5rem,9vw,9.25rem);
  line-height:.96;
  letter-spacing:.1em;
  text-transform:uppercase;
  color:var(--c-fog);
}
.lede{
  font-size:clamp(1.05rem,1.3vw,1.22rem);
  line-height:1.85;
  color:rgba(242,244,248,.78);
  max-width:34em;
}
.mono{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--c-index);
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.24em;
  text-transform:uppercase;
  color:var(--c-lime);
}
.eyebrow::before{
  content:"";
  width:22px;height:1px;
  background:var(--c-copper);
}

/* ---------- 4. 可访问性 ---------- */
:focus-visible{
  outline:2px solid var(--c-lime);
  outline-offset:3px;
  border-radius:3px;
}
.skip-link{
  position:fixed;
  left:16px;
  top:-72px;
  z-index:120;
  padding:10px 20px;
  background:var(--c-lime);
  color:#0B1436;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.12em;
  text-decoration:none;
  border-radius:0 0 8px 8px;
  transition:top .18s ease;
}
.skip-link:focus{top:0}
.sr-only{
  position:absolute;
  width:1px;height:1px;
  padding:0;margin:-1px;
  overflow:hidden;
  clip:rect(0 0 0 0);
  white-space:nowrap;
  border:0;
}

/* ---------- 5. 布局容器 ---------- */
.wrap{
  width:100%;
  max-width:var(--maxw);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.section{
  position:relative;
  padding-block:clamp(56px,8vw,120px);
  z-index:1;
}
.section--tight{padding-block:clamp(32px,4vw,64px)}
.section--band{
  background:var(--c-carbon);
  border-top:1px solid var(--line-soft);
  border-bottom:1px solid var(--line-soft);
}
.section--deep{
  background:
    linear-gradient(180deg,var(--c-ink) 0%,rgba(27,38,80,.55) 50%,var(--c-ink) 100%);
}

.grid-12{
  display:grid;
  grid-template-columns:repeat(12,minmax(0,1fr));
  gap:clamp(16px,2.4vw,32px);
}
.span-3{grid-column:span 3}
.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}

/* ---------- 6. 通用组件 ---------- */
.panel{
  position:relative;
  background:var(--c-panel);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:clamp(20px,2.6vw,34px);
}
.panel--soft{
  background:rgba(23,31,61,.55);
  border-radius:var(--radius-sm);
}

.stat{display:flex;flex-direction:column;gap:6px}
.stat-value{
  font-family:var(--font-mono);
  font-weight:400;
  font-size:clamp(1.9rem,4vw,3.4rem);
  line-height:1;
  letter-spacing:-.01em;
  color:var(--c-fog);
}
.stat-value--lime{color:var(--c-lime)}
.stat-value--amber{color:var(--c-amber)}
.stat-value--signal{color:var(--c-signal)}
.stat-label{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  color:var(--c-index);
}

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 11px;
  border:1px solid var(--line-strong);
  border-radius:999px;
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.12em;
  color:var(--c-index);
  white-space:nowrap;
}
.tag--lime{border-color:rgba(198,242,74,.5);color:var(--c-lime)}
.tag--amber{border-color:rgba(255,122,47,.5);color:var(--c-amber)}

.rule{
  height:1px;
  border:0;
  margin:0;
  background:var(--line);
}
.rule--copper{background:linear-gradient(90deg,var(--c-copper),rgba(181,96,58,0))}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  padding:13px 26px;
  border:1px solid transparent;
  border-radius:999px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.14em;
  text-decoration:none;
  cursor:pointer;
  transition:background-color .18s ease,border-color .18s ease,color .18s ease,transform .18s ease;
}
.btn--lime{background:var(--c-lime);color:#0B1436}
.btn--lime:hover{background:#d6f872;transform:translateY(-1px)}
.btn--ghost{border-color:var(--line-strong);color:var(--c-fog)}
.btn--ghost:hover{border-color:var(--c-lime);color:var(--c-lime)}
.btn--amber{border-color:rgba(255,122,47,.5);color:var(--c-amber)}
.btn--amber:hover{background:rgba(255,122,47,.12)}

.breadcrumb{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  color:var(--c-index);
}
.breadcrumb ol{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:9px;
}
.breadcrumb li{display:flex;align-items:center;gap:9px}
.breadcrumb li+li::before{content:"/";color:rgba(138,148,168,.45)}
.breadcrumb a{color:var(--c-index);text-decoration:none}
.breadcrumb a:hover{color:var(--c-lime)}
.breadcrumb [aria-current="page"]{color:var(--c-fog)}

/* 图片容器：夜间灯光渐变占位，页面阶段放入 <img> */
.media-frame{
  position:relative;
  overflow:hidden;
  isolation:isolate;
  aspect-ratio:16/9;
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:
    radial-gradient(120% 100% at 12% 0%,rgba(198,242,74,.16),transparent 58%),
    radial-gradient(90% 80% at 100% 100%,rgba(255,122,47,.14),transparent 60%),
    linear-gradient(150deg,var(--c-night),var(--c-panel) 55%,var(--c-carbon));
}
.media-frame img{
  width:100%;height:100%;
  object-fit:cover;
}
.media-frame::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:linear-gradient(180deg,rgba(11,20,54,0) 52%,rgba(11,20,54,.62));
}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--plate{aspect-ratio:4/3}
.media-frame--square{aspect-ratio:1/1}
.media-frame--tall{aspect-ratio:3/4}

/* 渐入协议 */
[data-reveal]{
  opacity:0;
  transform:translateY(18px);
  transition:opacity .46s ease,transform .46s ease;
  transition-delay:calc(var(--reveal-delay,0) * 80ms);
}
[data-reveal].is-revealed{opacity:1;transform:none}

/* ==========================================================================
   7. 头部
   ========================================================================== */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(11,20,54,.95);
  backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  border-bottom:1px solid var(--line);
}
.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:clamp(14px,2.4vw,40px);
  width:100%;
  max-width:var(--maxw);
  margin-inline:auto;
  padding:15px var(--gutter);
}

.header-brand{
  display:flex;
  flex-direction:column;
  gap:5px;
  flex:0 0 auto;
  min-width:0;
}
.brand-link{
  display:flex;
  flex-direction:column;
  gap:3px;
  text-decoration:none;
}
.brand-mark{
  font-family:var(--font-display);
  font-weight:300;
  font-size:clamp(1.02rem,1.5vw,1.35rem);
  letter-spacing:.2em;
  line-height:1.1;
  color:var(--c-fog);
  white-space:nowrap;
  transition:color .18s ease;
}
.brand-sub{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.28em;
  text-transform:uppercase;
  color:var(--c-copper);
}
.brand-link:hover .brand-mark{color:var(--c-lime)}

.season-flag{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.14em;
  color:var(--c-index);
  white-space:nowrap;
  max-width:none;
}
.season-flag::before{
  content:"";
  width:6px;height:6px;
  border-radius:50%;
  background:var(--c-lime);
  box-shadow:0 0 0 3px rgba(198,242,74,.16);
  animation:dotPulse 2.8s ease-in-out infinite;
}
@keyframes dotPulse{
  0%,100%{box-shadow:0 0 0 3px rgba(198,242,74,.16)}
  50%{box-shadow:0 0 0 7px rgba(198,242,74,.04)}
}

.header-rule{
  position:relative;
  flex:1 1 auto;
  min-width:32px;
  height:1px;
  background:linear-gradient(90deg,rgba(181,96,58,.9) 0%,rgba(138,148,168,.2) 46%,rgba(198,242,74,.5) 100%);
}
.rule-tag{
  position:absolute;
  left:clamp(6px,2vw,28px);
  top:50%;
  transform:translateY(-50%);
  padding:0 10px;
  background:var(--c-ink);
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.16em;
  color:rgba(138,148,168,.9);
  white-space:nowrap;
}

.nav-toggle{
  display:none;
  align-items:center;
  gap:10px;
  padding:10px 16px;
  background:transparent;
  border:1px solid var(--line-strong);
  border-radius:999px;
  color:var(--c-fog);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  cursor:pointer;
  transition:border-color .18s ease,background-color .18s ease;
}
.nav-toggle:hover{border-color:var(--c-lime)}
.nav-toggle-bars{display:inline-flex;flex-direction:column;gap:4px;width:16px}
.nav-toggle-bars i{
  display:block;
  height:1px;
  background:currentColor;
  transition:transform .2s ease;
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars i:first-child{transform:translateY(2.5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars i:last-child{transform:translateY(-2.5px) rotate(-45deg)}

.site-nav{
  display:flex;
  align-items:center;
  gap:clamp(16px,2.4vw,34px);
  flex:0 0 auto;
}
.nav-list{
  display:flex;
  align-items:center;
  gap:clamp(11px,1.5vw,24px);
}
.nav-list li{position:relative}
.nav-list a{
  position:relative;
  display:inline-flex;
  align-items:baseline;
  gap:7px;
  padding:6px 0;
  text-decoration:none;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.1em;
  color:var(--c-index);
  white-space:nowrap;
  transition:color .16s ease;
}
.nav-idx{
  font-size:9px;
  letter-spacing:.06em;
  color:rgba(138,148,168,.62);
  transition:color .16s ease;
}
.nav-list a:hover{color:var(--c-fog)}
.nav-list a:hover .nav-idx{color:var(--c-copper)}
.nav-list a[aria-current="page"]{color:var(--c-fog)}
.nav-list a[aria-current="page"] .nav-idx{color:var(--c-lime)}
.nav-list a[aria-current="page"]::after{
  content:"";
  position:absolute;
  left:0;
  bottom:-3px;
  width:16px;
  height:2px;
  background:var(--c-lime);
}

.nav-cta{
  display:inline-flex;
  align-items:center;
  gap:9px;
  padding:9px 18px;
  border:1px solid rgba(198,242,74,.45);
  border-radius:999px;
  text-decoration:none;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.1em;
  color:var(--c-lime);
  white-space:nowrap;
  transition:background-color .18s ease,border-color .18s ease;
}
.nav-cta::before{
  content:"";
  width:6px;height:6px;
  border-radius:50%;
  background:var(--c-lime);
  box-shadow:0 0 0 3px rgba(198,242,74,.16);
}
.nav-cta:hover{background:rgba(198,242,74,.1);border-color:var(--c-lime)}

/* ==========================================================================
   8. 页脚
   ========================================================================== */
.site-footer{
  position:relative;
  margin-top:clamp(72px,10vw,140px);
  background:var(--c-carbon);
  border-top:1px solid var(--line);
  z-index:1;
}
.site-footer::before{
  content:"";
  position:absolute;
  left:0;right:0;top:0;
  height:1px;
  background:linear-gradient(90deg,transparent,rgba(198,242,74,.55) 28%,rgba(255,122,47,.5) 72%,transparent);
  pointer-events:none;
}
.footer-top{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  justify-content:space-between;
  gap:14px 32px;
  width:100%;
  max-width:var(--maxw);
  margin-inline:auto;
  padding:clamp(46px,6vw,78px) var(--gutter) clamp(26px,3.4vw,42px);
  border-bottom:1px solid var(--line-soft);
}
.footer-brand{
  font-family:var(--font-display);
  font-weight:300;
  font-size:clamp(1.4rem,3vw,2.2rem);
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--c-fog);
  max-width:none;
}
.footer-tagline{
  font-size:14px;
  letter-spacing:.02em;
  color:var(--c-index);
  max-width:32em;
}

.footer-grid{
  display:grid;
  grid-template-columns:1.15fr 1fr 1.3fr .9fr;
  gap:clamp(24px,3.4vw,56px);
  width:100%;
  max-width:var(--maxw);
  margin-inline:auto;
  padding:clamp(34px,4.4vw,58px) var(--gutter) clamp(42px,5vw,72px);
}
.footer-col{min-width:0}
.footer-heading{
  position:relative;
  font-family:var(--font-mono);
  font-weight:400;
  font-size:11px;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--c-copper);
  padding-bottom:12px;
  margin-bottom:18px;
}
.footer-heading::after{
  content:"";
  position:absolute;
  left:0;bottom:0;
  width:28px;height:1px;
  background:var(--c-copper);
}
.footer-links li+li{margin-top:10px}
.footer-links a{
  display:inline-block;
  font-size:14.5px;
  letter-spacing:.02em;
  color:rgba(242,244,248,.72);
  text-decoration:none;
  transition:color .16s ease,transform .16s ease;
}
.footer-links a:hover{color:var(--c-lime);transform:translateX(3px)}

.contact-list{display:flex;flex-direction:column;gap:12px}
.contact-row{
  display:flex;
  align-items:baseline;
  gap:12px;
  min-width:0;
}
.contact-key{
  flex:0 0 auto;
  min-width:38px;
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.12em;
  color:var(--c-index);
}
.contact-val{
  font-size:14.5px;
  color:rgba(242,244,248,.86);
  word-break:break-word;
}
.footer-note{
  margin-top:16px;
  font-size:12.5px;
  line-height:1.7;
  color:rgba(138,148,168,.9);
  max-width:30em;
}

.footer-bar{
  background:rgba(11,20,54,.62);
  border-top:1px solid var(--line-soft);
}
.footer-bar-inner{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:14px 24px;
  width:100%;
  max-width:var(--maxw);
  margin-inline:auto;
  padding:18px var(--gutter);
}
.footer-legal{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.08em;
  color:var(--c-index);
  max-width:none;
}
.footer-cta{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding-bottom:2px;
  border-bottom:1px solid rgba(198,242,74,.4);
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.1em;
  color:var(--c-lime);
  text-decoration:none;
}
.footer-cta span{transition:transform .18s ease}
.footer-cta:hover span{transform:translateX(4px)}

/* ==========================================================================
   9. 响应式
   ========================================================================== */
@media (max-width:1200px){
  .footer-grid{grid-template-columns:1fr 1fr}
}

@media (max-width:960px){
  .header-rule{display:none}
  .nav-toggle{display:inline-flex}

  .site-nav{
    position:fixed;
    inset:0;
    z-index:55;
    display:flex;
    flex-direction:column;
    align-items:stretch;
    justify-content:flex-start;
    gap:26px;
    padding:104px var(--gutter) 44px;
    overflow-y:auto;
    overscroll-behavior:contain;
    background:
      radial-gradient(120% 80% at 100% 0%,rgba(255,122,47,.12),transparent 62%),
      linear-gradient(165deg,#0B1436 0%,#12161C 58%,#0B1436 100%);
    opacity:0;
    visibility:hidden;
    transform:translateY(-10px);
    transition:opacity .24s ease,transform .24s ease,visibility .24s;
  }
  .site-nav[data-open]{
    opacity:1;
    visibility:visible;
    transform:none;
  }

  .nav-list{
    display:block;
    border-top:1px solid var(--line);
  }
  .nav-list li{
    border-bottom:1px solid var(--line);
  }
  .nav-list a{
    display:flex;
    width:100%;
    align-items:baseline;
    gap:14px;
    padding:18px 2px;
    font-size:14px;
    letter-spacing:.14em;
  }
  .nav-idx{font-size:10px}
  .nav-list a[aria-current="page"]::after{
    left:auto;
    right:2px;
    top:50%;
    bottom:auto;
    transform:translateY(-50%);
    width:20px;
  }
  .nav-cta{align-self:flex-start;padding:12px 22px;font-size:12.5px}

  .grid-12{gap:20px}
  .span-7,.span-8,.span-5,.span-6{grid-column:span 12}

  .section{padding-block:clamp(44px,9vw,80px)}
}

@media (max-width:640px){
  :root{--radius:20px}
  .span-3,.span-4{grid-column:span 12}
  .header-inner{padding:13px var(--gutter)}
  .brand-sub{letter-spacing:.2em}
  .season-flag{font-size:9.5px;letter-spacing:.1em}
  .nav-toggle{padding:9px 14px}
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .footer-top{flex-direction:column;align-items:flex-start}
  .footer-bar-inner{flex-direction:column;align-items:flex-start}
  .display-hero{letter-spacing:.06em}
}

body.nav-open{overflow:hidden}

/* ---------- 10. 减弱动效 ---------- */
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  html{scroll-behavior:auto}
  [data-reveal]{opacity:1 !important;transform:none !important}
  .site-nav{transform:none !important}
}