/* 易贝体育看台 · 共享站点样式 /assets/site.css */

/* ---------- 1. tokens & reset ---------- */
:root{
  --ink:#0A0E0D;
  --panel:#10201B;
  --rule:#2C3532;
  --moss:#4E6B54;
  --clay:#B0764C;
  --paper:#F1F3EC;
  --cyan:#3FE0CE;
  --lime:#BDF24A;
  --red:#C0453A;
  --glass:rgba(241,243,236,.06);
  --glass-line:rgba(241,243,236,.14);
  --dim:rgba(241,243,236,.68);
  --dim-2:rgba(241,243,236,.48);
  --shell:1240px;
  --gutter:clamp(16px,4vw,44px);
  --stack:clamp(20px,3vw,40px);
  --r-panel:18px;
  --r-cap:999px;
  --dur:160ms;
  --font-display:"PingFang SC","Hiragino Sans GB","Source Han Sans SC","Noto Sans CJK SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-body:"PingFang SC","Hiragino Sans GB","Source Han Sans SC","Noto Sans CJK SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:ui-monospace,"SF Mono",SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
}

*,*::before,*::after{box-sizing:border-box}

html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:112px;
}

body{
  margin:0;
  min-height:100%;
  background:
    radial-gradient(120% 60% at 84% -12%,rgba(63,224,206,.07),transparent 62%),
    radial-gradient(90% 52% at 6% 2%,rgba(176,118,76,.06),transparent 64%),
    var(--ink);
  color:var(--paper);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.9;
  letter-spacing:.02em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

h1,h2,h3,h4,h5,h6{margin:0;font-size:inherit;font-weight:inherit;line-height:inherit}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
img,svg,video{display:block;max-width:100%}
figure{margin:0}
figcaption{margin:0}
a{color:var(--cyan);text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer}
table{border-collapse:collapse;width:100%}
strong,b{font-weight:800;color:var(--paper)}

:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:4px}
:focus:not(:focus-visible){outline:none}

/* ---------- 2. 外壳容器与章节节奏 ---------- */
.yb-shell{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding-inline:var(--gutter);
}

.yb-section{padding-block:clamp(48px,7vw,104px)}
.yb-stack{display:grid;gap:14px}

/* ---------- 3. 头部：悬浮胶囊浮岛 ---------- */
.yb-skip{
  position:fixed;
  top:10px;left:10px;
  z-index:200;
  display:inline-block;
  padding:10px 18px;
  border-radius:var(--r-cap);
  background:var(--lime);
  color:var(--ink);
  font-size:14px;
  font-weight:700;
  letter-spacing:.02em;
  transform:translateY(-200%);
  transition:transform var(--dur) ease;
}
.yb-skip:focus,
.yb-skip:focus-visible{transform:translateY(0);outline-color:var(--lime)}

.yb-header{
  position:sticky;
  top:0;
  z-index:80;
  padding:clamp(10px,1.6vw,16px) 0 0;
  background:linear-gradient(180deg,rgba(10,14,13,.94) 44%,rgba(10,14,13,0) 100%);
}
.yb-header[data-pinned="true"]{
  background:linear-gradient(180deg,rgba(10,14,13,1) 62%,rgba(10,14,13,0) 100%);
}

.yb-header__progress{
  position:absolute;
  top:0;left:0;
  z-index:2;
  display:block;
  width:0;
  height:2px;
  background:linear-gradient(90deg,var(--cyan),var(--lime));
}

.yb-capsule{
  position:relative;
  display:flex;
  align-items:center;
  gap:clamp(10px,1.8vw,24px);
  width:min(var(--shell),92vw);
  margin-inline:auto;
  padding:8px 10px 8px 16px;
  background:var(--glass);
  border:1px solid var(--glass-line);
  border-radius:var(--r-cap);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  box-shadow:0 26px 60px -44px rgba(0,0,0,.95);
  transition:background-color var(--dur) ease,border-color var(--dur) ease,box-shadow var(--dur) ease;
}
.yb-header[data-pinned="true"] .yb-capsule{
  background:rgba(16,32,27,.72);
  border-color:rgba(241,243,236,.2);
}

.yb-brand{
  display:flex;
  align-items:center;
  gap:12px;
  flex:0 0 auto;
  padding-right:clamp(8px,1.6vw,18px);
  border-right:1px solid var(--rule);
  color:var(--paper);
}
.yb-brand__mark{
  position:relative;
  flex:0 0 auto;
  width:22px;height:22px;
  border:1px solid var(--clay);
  border-radius:4px;
  background:linear-gradient(180deg,rgba(176,118,76,.24),rgba(176,118,76,0));
}
.yb-brand__mark::before{
  content:"";
  position:absolute;
  inset:6px;
  background:var(--lime);
}
.yb-brand__text{display:flex;flex-direction:column;gap:2px;line-height:1.18}
.yb-brand__name{
  font-family:var(--font-display);
  font-weight:900;
  font-size:17px;
  letter-spacing:0;
  color:var(--paper);
}
.yb-brand__sig{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.14em;
  color:var(--clay);
  white-space:nowrap;
}

.yb-nav{flex:1 1 auto;min-width:0}
.yb-nav__list{display:flex;align-items:center;gap:2px}
.yb-nav__link{
  position:relative;
  display:block;
  padding:9px 13px;
  border-radius:var(--r-cap);
  font-size:14px;
  line-height:1.4;
  color:var(--dim);
  white-space:nowrap;
  transition:color var(--dur) ease,background-color var(--dur) ease,box-shadow var(--dur) ease;
}
.yb-nav__link::after{
  content:"";
  position:absolute;
  left:13px;right:13px;bottom:5px;
  height:1px;
  background:var(--cyan);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform var(--dur) ease;
}
.yb-nav__link:hover{color:var(--cyan)}
.yb-nav__link:hover::after{transform:scaleX(1)}
.yb-nav__link[aria-current="page"]{
  color:var(--cyan);
  background:rgba(63,224,206,.12);
  box-shadow:inset 0 0 0 1px rgba(63,224,206,.42);
}
.yb-nav__link[aria-current="page"]::after{transform:scaleX(1)}

.yb-coord{
  flex:0 0 auto;
  padding-left:14px;
  border-left:1px solid var(--rule);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.08em;
  color:var(--cyan);
  white-space:nowrap;
}

.yb-update{
  flex:0 0 auto;
  display:flex;
  align-items:center;
  gap:8px;
  margin-left:auto;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.04em;
  color:var(--dim);
  white-space:nowrap;
}
.yb-update__dot{
  flex:0 0 auto;
  width:7px;height:7px;
  background:var(--lime);
}

.yb-nav-toggle{
  display:none;
  align-items:center;
  gap:9px;
  margin-left:auto;
  padding:9px 15px;
  border:1px solid var(--glass-line);
  border-radius:var(--r-cap);
  font-size:13px;
  color:var(--paper);
  transition:border-color var(--dur) ease,color var(--dur) ease;
}
.yb-nav-toggle:hover{border-color:var(--cyan);color:var(--cyan)}
.yb-nav-toggle__bars{position:relative;flex:0 0 auto;width:16px;height:10px}
.yb-nav-toggle__bars::before,
.yb-nav-toggle__bars::after{
  content:"";
  position:absolute;left:0;
  width:16px;height:1.5px;
  background:currentColor;
}
.yb-nav-toggle__bars::before{top:0}
.yb-nav-toggle__bars::after{bottom:0}
.yb-nav-toggle__label{font-family:var(--font-mono);letter-spacing:.1em}

/* ---------- 4. 移动坐标索引面板 ---------- */
.yb-index{
  display:none;
  width:min(var(--shell),92vw);
  margin:10px auto 0;
  padding:18px;
  background:rgba(16,32,27,.95);
  border:1px solid var(--glass-line);
  border-radius:22px;
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  box-shadow:0 34px 70px -46px rgba(0,0,0,.96);
}
.yb-index[data-open]{display:block}
.yb-index__head{
  display:flex;
  align-items:baseline;
  justify-content:space-between;
  gap:16px;
  padding-bottom:12px;
  border-bottom:1px solid var(--rule);
}
.yb-index__title{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.18em;
  color:var(--clay);
}
.yb-index__list{display:grid;gap:2px;padding-top:12px}
.yb-index__link{
  display:flex;
  align-items:center;
  gap:14px;
  padding:12px 10px;
  border-radius:12px;
  font-size:15px;
  color:var(--paper);
  transition:background-color var(--dur) ease,color var(--dur) ease;
}
.yb-index__link:hover{background:var(--glass);color:var(--cyan)}
.yb-index__link[aria-current="page"]{color:var(--cyan);background:rgba(63,224,206,.12)}
.yb-index__code{
  min-width:26px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.08em;
  color:var(--clay);
}

/* ---------- 5. 页脚：宽幅碳黑面板 + 刻度分隔 ---------- */
.yb-footer{
  margin-top:clamp(48px,7vw,110px);
  background:var(--ink);
  border-top:1px solid var(--rule);
}
.yb-footer__inner{
  position:relative;
  display:grid;
  grid-template-columns:minmax(0,.85fr) minmax(0,2fr);
  gap:clamp(24px,3vw,44px);
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding:clamp(32px,5vw,64px) calc(var(--gutter) + 42px) clamp(24px,3vw,40px) var(--gutter);
}
.yb-footer__brand{min-width:0}
.yb-footer__mark{
  position:relative;
  display:block;
  width:22px;height:22px;
  margin-bottom:14px;
  border:1px solid var(--clay);
  border-radius:4px;
}
.yb-footer__mark::before{
  content:"";
  position:absolute;
  inset:6px;
  background:var(--lime);
}
.yb-footer__brandname{
  font-family:var(--font-display);
  font-weight:900;
  font-size:20px;
  line-height:1.3;
  color:var(--paper);
}
.yb-footer__tagline{
  margin-top:8px;
  max-width:26ch;
  font-size:13px;
  line-height:1.85;
  color:var(--dim-2);
}
.yb-footer__cols{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:clamp(20px,3vw,36px);
}
.yb-fcol{
  min-width:0;
  padding-left:clamp(14px,1.6vw,20px);
  border-left:1px solid var(--rule);
}
.yb-fcol__title{
  margin-bottom:14px;
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:500;
  letter-spacing:.18em;
  color:var(--clay);
}
.yb-fcol__list{display:grid;gap:9px}
.yb-fcol__link{
  display:inline-block;
  font-size:14px;
  color:var(--dim);
  transition:color var(--dur) ease;
}
.yb-fcol__link:hover{color:var(--cyan)}
.yb-fcol__text{
  font-size:13px;
  line-height:1.85;
  color:var(--dim-2);
}
.yb-fcol__text + .yb-fcol__text{margin-top:8px}

.yb-footer__scale{
  position:absolute;
  top:clamp(32px,5vw,64px);
  bottom:clamp(24px,3vw,40px);
  right:calc(var(--gutter) + 14px);
  width:1px;
  background:repeating-linear-gradient(180deg,var(--rule) 0 1px,transparent 1px 14px);
}

.yb-footer__bar{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:12px 22px;
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding:16px var(--gutter) 28px;
  border-top:1px solid var(--rule);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.08em;
  color:var(--dim-2);
}
.yb-footer__legal{color:var(--dim)}
.yb-footer__legal-links{
  display:flex;
  flex-wrap:wrap;
  gap:8px 18px;
  margin-left:auto;
}
.yb-footer__legal-link{
  color:var(--dim);
  transition:color var(--dur) ease;
}
.yb-footer__legal-link:hover{color:var(--cyan)}
.yb-footer__copy{color:var(--dim-2)}

/* ---------- 6. 通用内容组件 ---------- */
.yb-eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.2em;
  color:var(--clay);
  text-transform:uppercase;
}
.yb-eyebrow::before{
  content:"";
  width:10px;height:10px;
  border:1px solid var(--clay);
  background:linear-gradient(90deg,var(--clay) 0 50%,transparent 50% 100%);
}

.yb-h1{
  font-family:var(--font-display);
  font-weight:900;
  font-size:clamp(34px,6.2vw,68px);
  line-height:1.04;
  letter-spacing:-.01em;
  color:var(--paper);
}
.yb-h2{
  font-family:var(--font-display);
  font-weight:900;
  font-size:clamp(24px,3.4vw,40px);
  line-height:1.14;
  color:var(--paper);
}
.yb-h3{
  font-family:var(--font-display);
  font-weight:800;
  font-size:clamp(18px,2vw,22px);
  line-height:1.35;
  color:var(--paper);
}
.yb-lede{
  max-width:60ch;
  font-size:clamp(15px,1.5vw,17px);
  line-height:1.9;
  color:var(--dim);
}
.yb-text{
  max-width:68ch;
  font-size:15px;
  line-height:1.9;
  letter-spacing:.02em;
  color:var(--dim);
}
.yb-text + .yb-text{margin-top:14px}

.yb-link{
  position:relative;
  color:var(--paper);
  transition:color var(--dur) ease;
  background-image:linear-gradient(var(--cyan),var(--cyan));
  background-repeat:no-repeat;
  background-position:left calc(100% - 1px);
  background-size:0 1px;
  transition:color var(--dur) ease,background-size var(--dur) ease;
}
.yb-link:hover{color:var(--cyan);background-size:100% 1px}

.yb-num{
  display:inline-block;
  font-family:var(--font-mono);
  font-weight:700;
  font-size:clamp(44px,8vw,120px);
  line-height:.88;
  letter-spacing:-.03em;
  color:var(--lime);
  font-variant-numeric:tabular-nums;
}
.yb-num--sm{font-size:clamp(28px,3.6vw,46px);line-height:1}
.yb-num__unit{
  margin-left:.4em;
  font-size:.24em;
  font-weight:500;
  letter-spacing:.06em;
  color:var(--dim);
}

.yb-tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 10px;
  border:1px solid var(--rule);
  border-radius:var(--r-cap);
  font-family:var(--font-mono);
  font-size:11px;
  line-height:1.6;
  letter-spacing:.1em;
  color:var(--moss);
}
.yb-tag--clay{border-color:rgba(176,118,76,.5);color:var(--clay)}
.yb-tag--cyan{border-color:rgba(63,224,206,.5);color:var(--cyan)}
.yb-tag--red{border-color:rgba(192,69,58,.55);color:var(--red)}

.yb-rule{
  height:1px;
  margin-block:clamp(18px,2.4vw,30px);
  border:0;
  background:var(--rule);
}
.yb-rule--scale{position:relative}
.yb-rule--scale::after{
  content:"";
  position:absolute;
  left:0;right:0;top:0;
  height:8px;
  background:repeating-linear-gradient(90deg,var(--rule) 0 1px,transparent 1px 18px);
}

.yb-grid{display:grid;gap:clamp(14px,2vw,24px)}
.yb-grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.yb-grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.yb-grid--4{grid-template-columns:repeat(4,minmax(0,1fr))}
.yb-grid--split{grid-template-columns:minmax(0,1.4fr) minmax(0,1fr)}

.yb-panel{
  position:relative;
  padding:clamp(20px,3.2vw,40px);
  background:var(--panel);
  border:1px solid var(--rule);
  border-radius:var(--r-panel);
}
.yb-panel--glass{
  background:var(--glass);
  border-color:var(--glass-line);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
}
.yb-panel--flush{padding:0;overflow:hidden}

.yb-btn{
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:12px 22px;
  border:1px solid var(--glass-line);
  border-radius:var(--r-cap);
  background:var(--glass);
  color:var(--paper);
  font-size:14px;
  font-weight:600;
  letter-spacing:.02em;
  transition:background-color var(--dur) ease,border-color var(--dur) ease,color var(--dur) ease;
}
.yb-btn:hover{border-color:var(--cyan);color:var(--cyan)}
.yb-btn--solid{
  background:var(--lime);
  border-color:var(--lime);
  color:var(--ink);
}
.yb-btn--solid:hover{
  background:var(--cyan);
  border-color:var(--cyan);
  color:var(--ink);
}
.yb-btn--ghost{
  background:transparent;
  border-color:var(--rule);
  color:var(--dim);
}
.yb-btn--ghost:hover{border-color:var(--cyan);color:var(--cyan)}

.yb-crumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  color:var(--dim-2);
}
.yb-crumb__item{color:var(--dim)}
.yb-crumb__item a{color:inherit;transition:color var(--dur) ease}
.yb-crumb__item a:hover{color:var(--cyan)}
.yb-crumb__sep{color:var(--rule)}

/* ---------- 7. 图片容器基础规则（页面阶段放置素材） ---------- */
.yb-media{
  position:relative;
  isolation:isolate;
  overflow:hidden;
  aspect-ratio:16/9;
  border:1px solid var(--rule);
  border-radius:var(--r-panel);
  background:linear-gradient(160deg,#10201B,#0A0E0D);
}
.yb-media--wide{aspect-ratio:21/9}
.yb-media--tall{aspect-ratio:3/4}
.yb-media--square{aspect-ratio:1/1}
.yb-media > img,
.yb-media__img{
  width:100%;height:100%;
  object-fit:cover;
  filter:saturate(.78) contrast(1.1) brightness(.82);
}
.yb-media::before{
  content:"";
  position:absolute;
  inset:0;
  z-index:1;
  pointer-events:none;
  background:linear-gradient(180deg,rgba(10,14,13,.14) 22%,rgba(10,14,13,.88) 100%);
}
.yb-media__grid{
  position:absolute;
  inset:0;
  z-index:1;
  pointer-events:none;
  opacity:.6;
  background-image:
    repeating-linear-gradient(90deg,rgba(241,243,236,.16) 0 1px,transparent 1px 56px),
    repeating-linear-gradient(0deg,rgba(241,243,236,.13) 0 1px,transparent 1px 56px);
}
.yb-media__trace{
  position:absolute;
  left:0;right:0;bottom:0;
  z-index:1;
  height:52%;
  pointer-events:none;
  opacity:.85;
  background:repeating-linear-gradient(90deg,rgba(63,224,206,.85) 0 2px,transparent 2px 13px);
  -webkit-mask-image:linear-gradient(180deg,transparent,rgba(0,0,0,.92));
  mask-image:linear-gradient(180deg,transparent,rgba(0,0,0,.92));
}
.yb-media__caption{
  position:absolute;
  left:0;right:0;bottom:0;
  z-index:2;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px;
  padding:clamp(12px,2vw,20px);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  color:var(--paper);
}

/* ---------- 8. 响应式 ---------- */
@media (max-width:1180px){
  .yb-update{display:none}
}

@media (max-width:1024px){
  .yb-footer__inner{
    grid-template-columns:1fr;
    padding-right:var(--gutter);
  }
  .yb-footer__scale{display:none}
  .yb-footer__cols{grid-template-columns:repeat(2,minmax(0,1fr))}
}

@media (max-width:980px){
  .yb-nav__link{padding:8px 9px;font-size:13px}
  .yb-coord{padding-left:10px;font-size:10px}
}

@media (max-width:900px){
  html{scroll-padding-top:96px}
  .yb-nav{display:none}
  .yb-coord{display:none}
  .yb-update{display:none}
  .yb-nav-toggle{display:flex}
  .yb-capsule{padding:8px 10px 8px 14px;gap:12px}
  .yb-brand{padding-right:12px}
  .yb-grid--2,
  .yb-grid--3,
  .yb-grid--4,
  .yb-grid--split{grid-template-columns:1fr}
}

@media (max-width:640px){
  body{font-size:15px;line-height:1.85}
  .yb-brand__sig{display:none}
  .yb-brand__name{font-size:16px}
  .yb-capsule{width:min(var(--shell),94vw)}
  .yb-index{width:min(var(--shell),94vw);padding:14px}
  .yb-footer__cols{grid-template-columns:1fr}
  .yb-fcol{
    padding-left:0;
    padding-top:14px;
    border-left:0;
    border-top:1px solid var(--rule);
  }
  .yb-footer__bar{
    flex-direction:column;
    align-items:flex-start;
    gap:10px;
  }
  .yb-footer__legal-links{margin-left:0}
}

/* ---------- 9. 可访问性 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    transition-duration:.01ms !important;
    animation-duration:.01ms !important;
    animation-iteration-count:1 !important;
  }
}