/* =========================================================
   日搏体育赛场 · 共享样式表  /assets/site.css
   1 复位 / 2 变量 / 3 基础排版 / 4 头部轨道 / 5 页脚 / 6 通用组件 / 7 无障碍
   ========================================================= */

/* ---------- 1. 复位 ---------- */
*,*::before,*::after{box-sizing:border-box}
html{color-scheme:dark;-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0}
h1,h2,h3,h4,h5,h6,p,figure,blockquote,dl,dd{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
img,svg,video{display:block;max-width:100%}
button,input,select,textarea{font:inherit;color:inherit}
table{border-collapse:collapse;width:100%}

/* ---------- 2. 变量 ---------- */
:root{
  --rb-night:#0B1210;
  --rb-deep:#12352B;
  --rb-turf:#1F5A45;
  --rb-red:#E23B2E;
  --rb-yellow:#F5C542;
  --rb-white:#F4F7F5;
  --rb-slate:#8FA39B;
  --rb-mist:#D9E4DE;
  --rb-ink:#182226;
  --rb-cyan:#5FD3B3;

  --rb-line:rgba(143,163,155,.22);
  --rb-line-strong:rgba(143,163,155,.38);
  --rb-grid:rgba(143,163,155,.075);

  --rb-rail-w:266px;
  --rb-top-h:58px;
  --rb-max:1180px;
  --rb-pad:clamp(18px,4vw,44px);
  --rb-gap:clamp(14px,2.2vw,26px);

  --rb-font-sans:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --rb-font-num:ui-monospace,SFMono-Regular,"JetBrains Mono","Cascadia Mono",Menlo,Consolas,"Courier New",monospace;

  --rb-ease:cubic-bezier(.22,.8,.28,1);
}

/* ---------- 3. 基础排版 ---------- */
body{
  min-height:100vh;
  padding-top:var(--rb-top-h);
  background-color:var(--rb-night);
  background-image:
    linear-gradient(to right,var(--rb-grid) 1px,transparent 1px),
    linear-gradient(to bottom,var(--rb-grid) 1px,transparent 1px);
  background-size:64px 64px;
  color:var(--rb-white);
  font-family:var(--rb-font-sans);
  font-size:16px;
  line-height:1.75;
  letter-spacing:.01em;
  text-rendering:optimizeLegibility;
}
body.rb-nav-open{overflow:hidden}

@media (min-width:1024px){
  body{padding-top:0;padding-left:var(--rb-rail-w)}
}

::selection{background:var(--rb-red);color:#fff}

/* ---------- 4. 头部轨道 ---------- */
.rb-header{position:relative;z-index:80;display:block}

.rb-skip{
  position:fixed;
  top:-72px;left:10px;z-index:95;
  padding:10px 18px;
  background:var(--rb-yellow);color:var(--rb-night);
  font-size:13px;font-weight:800;letter-spacing:.08em;text-decoration:none;
  border:1px solid var(--rb-yellow);
  transition:top .2s var(--rb-ease);
}
.rb-skip:focus{top:10px}

.rb-progress{
  position:fixed;top:0;left:0;right:0;height:2px;z-index:85;
  transform:scaleX(0);transform-origin:0 50%;
  background:linear-gradient(90deg,var(--rb-red),var(--rb-yellow) 55%,var(--rb-cyan));
  pointer-events:none;
  will-change:transform;
}
@media (min-width:1024px){
  .rb-progress{left:var(--rb-rail-w)}
}

/* 品牌块 */
.rb-brand{
  display:flex;align-items:center;gap:12px;
  color:var(--rb-white);text-decoration:none;
}
.rb-brand__mark{
  position:relative;flex:0 0 auto;display:block;
  width:26px;height:34px;
  border:1px solid var(--rb-line-strong);
  background:linear-gradient(180deg,rgba(217,228,222,.10),transparent 70%);
}
.rb-brand__dot{position:absolute;left:4px;display:block;width:16px;height:9px}
.rb-brand__dot--red{top:5px;background:var(--rb-red)}
.rb-brand__dot--yellow{top:19px;background:var(--rb-yellow)}
.rb-brand__text{display:block;min-width:0}
.rb-brand__name{display:block;font-size:16.5px;font-weight:800;letter-spacing:.06em;line-height:1.35}
.rb-brand__line{display:block;margin-top:3px;font-size:11px;line-height:1.5;color:var(--rb-slate);letter-spacing:.08em}
.rb-brand--compact .rb-brand__name{font-size:15px}
.rb-brand--compact .rb-brand__line{font-size:10.5px}
.rb-brand--compact .rb-brand__mark{width:22px;height:28px}
.rb-brand--compact .rb-brand__dot{left:3px;width:14px;height:7px}
.rb-brand--compact .rb-brand__dot--red{top:4px}
.rb-brand--compact .rb-brand__dot--yellow{top:15px}

/* 移动顶部条 */
.rb-topbar{
  position:fixed;top:0;left:0;right:0;z-index:75;
  height:var(--rb-top-h);
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:0 14px;
  background:rgba(11,18,16,.95);
  border-bottom:1px solid var(--rb-line-strong);
}
@media (min-width:1024px){
  .rb-topbar{display:none}
}

.rb-nav-toggle{
  display:inline-flex;align-items:center;gap:9px;
  padding:8px 12px;
  background:var(--rb-deep);color:var(--rb-white);
  border:1px solid var(--rb-line-strong);border-radius:0;
  font-size:12px;font-weight:800;letter-spacing:.16em;
  cursor:pointer;
  transition:border-color .2s var(--rb-ease),color .2s var(--rb-ease),background-color .2s var(--rb-ease);
}
.rb-nav-toggle:hover{border-color:var(--rb-yellow);color:var(--rb-yellow)}
.rb-nav-toggle[aria-expanded="true"]{border-color:var(--rb-red);color:var(--rb-red);background:rgba(226,59,46,.14)}
.rb-nav-toggle__bars{display:flex;flex-direction:column;gap:3px;width:16px}
.rb-nav-toggle__bar{display:block;height:2px;background:currentColor;transition:transform .24s var(--rb-ease),opacity .2s linear}
.rb-nav-toggle[aria-expanded="true"] .rb-nav-toggle__bar:nth-child(1){transform:translateY(5px) rotate(45deg)}
.rb-nav-toggle[aria-expanded="true"] .rb-nav-toggle__bar:nth-child(2){opacity:0}
.rb-nav-toggle[aria-expanded="true"] .rb-nav-toggle__bar:nth-child(3){transform:translateY(-5px) rotate(-45deg)}

/* 侧边轨道 */
.rb-rail{
  position:fixed;top:0;bottom:0;left:0;z-index:78;
  width:min(304px,86vw);
  display:flex;flex-direction:column;gap:16px;
  padding:22px 20px 24px;
  overflow-y:auto;overscroll-behavior:contain;
  background:
    linear-gradient(180deg,rgba(31,90,69,.55),rgba(11,18,16,.98) 62%),
    var(--rb-deep);
  border-right:1px solid var(--rb-line-strong);
  box-shadow:26px 0 64px rgba(0,0,0,.6);
  transform:translateX(-102%);
  visibility:hidden;
  transition:transform .32s var(--rb-ease),visibility .32s linear;
}
.rb-rail[data-open]{transform:translateX(0);visibility:visible}

@media (min-width:1024px){
  .rb-rail{
    width:var(--rb-rail-w);
    transform:none;visibility:visible;
    box-shadow:none;
  }
}

.rb-rail__head{padding-bottom:16px;border-bottom:1px solid var(--rb-line)}

.rb-rail__label{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding-bottom:9px;border-bottom:1px solid var(--rb-line);
  font-size:11px;font-weight:800;letter-spacing:.22em;text-transform:uppercase;
  color:var(--rb-slate);
}
.rb-rail__label-num{font-family:var(--rb-font-num);letter-spacing:.08em;color:var(--rb-yellow)}
.rb-rail__label--sub{border-bottom:0;padding-bottom:0;color:var(--rb-mist)}

.rb-nav__list{display:flex;flex-direction:column;gap:2px;margin-top:-4px}
.rb-nav__item{display:block}
.rb-nav__link{
  display:flex;align-items:baseline;gap:12px;
  padding:11px 12px 11px 14px;
  color:var(--rb-mist);text-decoration:none;
  border-left:2px solid transparent;
  border-bottom:1px solid rgba(143,163,155,.12);
  transition:background-color .2s var(--rb-ease),color .2s var(--rb-ease),border-color .2s var(--rb-ease),padding-left .2s var(--rb-ease);
}
.rb-nav__link:hover{
  background:rgba(31,90,69,.6);
  color:var(--rb-white);
  border-left-color:var(--rb-yellow);
  padding-left:18px;
}
.rb-nav__link[aria-current="page"]{
  background:linear-gradient(90deg,rgba(226,59,46,.24),rgba(31,90,69,.34) 55%,rgba(11,18,16,0));
  color:var(--rb-white);
  border-left-color:var(--rb-red);
  font-weight:800;
}
.rb-nav__link[aria-current="page"] .rb-nav__idx{color:var(--rb-red)}
.rb-nav__idx{font-family:var(--rb-font-num);font-size:11px;letter-spacing:.08em;color:var(--rb-slate)}
.rb-nav__text{font-size:15px;letter-spacing:.04em}

.rb-rail__quick{display:flex;flex-wrap:wrap;gap:6px}
.rb-rail__quick-link{
  display:inline-block;padding:5px 10px;
  font-size:12px;letter-spacing:.06em;text-decoration:none;
  color:var(--rb-mist);
  border:1px solid var(--rb-line);
  background:rgba(217,228,222,.05);
  transition:color .2s var(--rb-ease),background-color .2s var(--rb-ease),border-color .2s var(--rb-ease);
}
.rb-rail__quick-link:hover{background:var(--rb-cyan);border-color:var(--rb-cyan);color:var(--rb-night)}

.rb-rail__foot{
  margin-top:auto;padding-top:18px;
  border-top:1px solid var(--rb-line);
  display:flex;flex-direction:column;gap:10px;
}
.rb-rail__cta{
  display:block;text-align:center;
  padding:11px 14px;
  background:var(--rb-red);border:1px solid var(--rb-red);color:#fff;
  font-size:14px;font-weight:800;letter-spacing:.1em;text-decoration:none;
  transition:background-color .2s var(--rb-ease),transform .2s var(--rb-ease);
}
.rb-rail__cta:hover{background:#c62f24;transform:translateY(-1px)}
.rb-rail__note{font-size:11.5px;line-height:1.7;color:var(--rb-slate)}

.rb-rail__tag{display:none}
@media (min-width:1024px){
  .rb-rail__tag{
    display:block;position:absolute;top:130px;right:9px;
    writing-mode:vertical-rl;
    font-family:var(--rb-font-num);font-size:10px;letter-spacing:.32em;
    color:rgba(143,163,155,.34);
    pointer-events:none;
  }
}

/* 遮罩 */
.rb-scrim{
  position:fixed;inset:0;z-index:74;
  background:rgba(4,8,7,.68);
}
.rb-scrim[hidden]{display:none}
@media (min-width:1024px){
  .rb-scrim{display:none}
}

/* ---------- 5. 页脚 ---------- */
.rb-footer{
  position:relative;
  margin-top:clamp(48px,7vw,96px);
  padding:clamp(36px,5vw,66px) var(--rb-pad) 22px;
  background:linear-gradient(180deg,rgba(18,53,43,.88),var(--rb-night) 72%);
  border-top:1px solid var(--rb-line-strong);
  color:var(--rb-mist);
  font-size:14px;
}
.rb-footer::before{
  content:"";position:absolute;top:-1px;left:0;
  width:96px;height:3px;
  background:linear-gradient(90deg,var(--rb-red) 0 50%,var(--rb-yellow) 50% 100%);
}
.rb-footer__grid{
  max-width:var(--rb-max);margin:0 auto;
  display:grid;grid-template-columns:1fr;
  gap:clamp(26px,3.2vw,42px);
}
@media (min-width:720px){
  .rb-footer__grid{grid-template-columns:1.2fr 1fr}
}
@media (min-width:1024px){
  .rb-footer__grid{grid-template-columns:1.3fr 1fr 1.5fr}
}

.rb-footer__brand .rb-brand__mark{margin-bottom:14px}
.rb-footer__name{font-size:18px;font-weight:800;letter-spacing:.08em;color:var(--rb-white)}
.rb-footer__tagline{margin-top:7px;font-size:12px;letter-spacing:.12em;color:var(--rb-yellow)}
.rb-footer__note{margin-top:14px;max-width:34em;font-size:13px;line-height:1.85;color:var(--rb-slate)}

.rb-footer__col{min-width:0}
.rb-footer__title{
  padding-bottom:10px;margin-bottom:14px;
  border-bottom:1px solid var(--rb-line);
  font-size:11px;font-weight:800;letter-spacing:.24em;text-transform:uppercase;
  color:var(--rb-white);
}
.rb-footer__list{display:flex;flex-direction:column;gap:9px}
.rb-footer__item{display:block}
.rb-footer__link{
  color:var(--rb-mist);text-decoration:none;font-size:13.5px;
  border-bottom:1px solid transparent;
  transition:color .2s var(--rb-ease),border-color .2s var(--rb-ease),background-color .2s var(--rb-ease);
}
.rb-footer__link:hover{color:var(--rb-cyan);border-bottom-color:var(--rb-cyan)}
.rb-footer__link--strong{
  display:inline-block;margin-top:16px;padding:9px 18px;
  border:1px solid var(--rb-red);background:rgba(226,59,46,.14);
  color:var(--rb-white);font-weight:800;letter-spacing:.08em;
}
.rb-footer__link--strong:hover{background:var(--rb-red);border-color:var(--rb-red);color:#fff}

.rb-footer__contact{display:flex;flex-direction:column;gap:12px}
.rb-footer__row{
  display:grid;grid-template-columns:52px 1fr;gap:10px;align-items:start;
  padding-bottom:10px;
  border-bottom:1px dashed rgba(143,163,155,.18);
}
.rb-footer__k{font-size:11px;font-weight:800;letter-spacing:.16em;color:var(--rb-slate);padding-top:3px}
.rb-footer__v{font-size:13.5px;line-height:1.75;color:var(--rb-white);word-break:break-word}

.rb-copy{
  margin-left:9px;padding:2px 9px;vertical-align:1px;
  background:transparent;color:var(--rb-cyan);
  border:1px solid rgba(95,211,179,.5);border-radius:0;
  font-size:11px;font-weight:800;letter-spacing:.12em;
  cursor:pointer;
  transition:background-color .2s var(--rb-ease),color .2s var(--rb-ease),border-color .2s var(--rb-ease);
}
.rb-copy:hover{background:var(--rb-cyan);color:var(--rb-night)}
.rb-copy[data-copied]{background:var(--rb-yellow);border-color:var(--rb-yellow);color:var(--rb-night)}

.rb-footer__bottom{
  max-width:var(--rb-max);margin:clamp(28px,4vw,52px) auto 0;
  padding-top:16px;
  border-top:1px solid var(--rb-line);
  display:flex;flex-wrap:wrap;gap:8px 20px;align-items:center;justify-content:space-between;
  font-family:var(--rb-font-num);font-size:11.5px;letter-spacing:.08em;color:var(--rb-slate);
}
.rb-footer__icp{display:flex;align-items:center;gap:8px}
.rb-footer__icp::before{content:"";width:7px;height:7px;background:var(--rb-yellow);flex:0 0 auto}
.rb-footer__copyright{color:var(--rb-slate)}

/* ---------- 6. 通用组件 ---------- */
.rb-container{
  width:100%;max-width:var(--rb-max);
  margin:0 auto;
  padding:0 var(--rb-pad);
}

.rb-section{padding:clamp(44px,6vw,88px) 0}
.rb-section--tight{padding:clamp(26px,3.4vw,48px) 0}

.rb-eyebrow{
  display:inline-flex;align-items:center;gap:9px;
  font-size:11px;font-weight:800;letter-spacing:.24em;text-transform:uppercase;
  color:var(--rb-slate);
}
.rb-eyebrow::before{content:"";width:3px;height:13px;background:var(--rb-red);flex:0 0 auto}

.rb-title{
  margin-top:12px;
  font-size:clamp(28px,4.6vw,52px);
  font-weight:900;line-height:1.2;letter-spacing:-.01em;
  color:var(--rb-white);
}
.rb-lead{
  margin-top:16px;max-width:38em;
  font-size:clamp(15px,1.5vw,17.5px);line-height:1.85;
  color:var(--rb-mist);
}

.rb-crumb{
  display:flex;flex-wrap:wrap;gap:8px;
  margin-bottom:18px;
  font-size:12px;letter-spacing:.1em;color:var(--rb-slate);
}
.rb-crumb li::after{content:"/";margin-left:8px;color:rgba(143,163,155,.5)}
.rb-crumb li:last-child::after{content:"";margin:0}
.rb-crumb a{color:var(--rb-slate);text-decoration:none}
.rb-crumb a:hover{color:var(--rb-cyan)}
.rb-crumb [aria-current="page"]{color:var(--rb-white)}

.rb-btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:12px 22px;border-radius:0;
  border:1px solid var(--rb-line-strong);
  background:transparent;color:var(--rb-white);
  font-size:14px;font-weight:800;letter-spacing:.1em;text-decoration:none;
  cursor:pointer;
  transition:background-color .2s var(--rb-ease),border-color .2s var(--rb-ease),color .2s var(--rb-ease),transform .2s var(--rb-ease);
}
.rb-btn:hover{transform:translateY(-1px)}
.rb-btn--red{background:var(--rb-red);border-color:var(--rb-red);color:#fff}
.rb-btn--red:hover{background:#c62f24;border-color:#c62f24}
.rb-btn--yellow{background:var(--rb-yellow);border-color:var(--rb-yellow);color:var(--rb-night)}
.rb-btn--yellow:hover{background:#e0b02f;border-color:#e0b02f}
.rb-btn--ghost:hover{border-color:var(--rb-cyan);color:var(--rb-cyan)}

.rb-tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:3px 9px;border-radius:0;
  border:1px solid var(--rb-line-strong);
  background:rgba(217,228,222,.05);
  color:var(--rb-mist);
  font-size:10.5px;font-weight:800;letter-spacing:.18em;text-transform:uppercase;
}
.rb-tag--red{border-color:var(--rb-red);background:rgba(226,59,46,.18);color:#FFD9D4}
.rb-tag--yellow{border-color:var(--rb-yellow);background:rgba(245,197,66,.12);color:var(--rb-yellow)}
.rb-tag--cyan{border-color:rgba(95,211,179,.6);background:rgba(95,211,179,.1);color:var(--rb-cyan)}

.rb-panel{
  position:relative;
  padding:clamp(18px,2.4vw,26px);
  border:1px solid var(--rb-line);
  background:linear-gradient(180deg,rgba(18,53,43,.72),rgba(11,18,16,.72));
}
.rb-panel--mist{background:var(--rb-mist);border-color:#b9c9c1;color:var(--rb-ink)}
.rb-panel--mist .rb-panel__title{color:var(--rb-ink)}
.rb-panel__head{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding-bottom:12px;margin-bottom:14px;
  border-bottom:1px solid var(--rb-line);
}
.rb-panel--mist .rb-panel__head{border-bottom-color:rgba(24,34,38,.2)}
.rb-panel__title{font-size:16px;font-weight:800;letter-spacing:.06em}

.rb-stat{display:block}
.rb-stat__num{
  display:block;
  font-family:var(--rb-font-num);
  font-size:clamp(28px,4vw,44px);font-weight:700;line-height:1;
  letter-spacing:-.02em;color:var(--rb-white);
}
.rb-stat__label{
  display:block;margin-top:7px;
  font-size:11px;font-weight:800;letter-spacing:.2em;text-transform:uppercase;
  color:var(--rb-slate);
}

.rb-grid{display:grid;gap:var(--rb-gap)}
.rb-grid--2,.rb-grid--3{grid-template-columns:1fr}
@media (min-width:680px){
  .rb-grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (min-width:900px){
  .rb-grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
}

.rb-prose{max-width:72ch;font-size:16px;line-height:1.78;color:var(--rb-mist)}
.rb-prose > * + *{margin-top:1.05em}
.rb-prose h2{
  margin-top:2em;
  font-size:clamp(20px,2.4vw,26px);font-weight:800;letter-spacing:.02em;
  color:var(--rb-white);
  padding-left:12px;border-left:3px solid var(--rb-red);
}
.rb-prose h3{margin-top:1.6em;font-size:18px;font-weight:800;color:var(--rb-white)}
.rb-prose a{color:var(--rb-cyan);text-underline-offset:3px}
.rb-prose a:hover{color:var(--rb-yellow)}
.rb-prose ul,.rb-prose ol{padding-left:1.3em;list-style:disc}
.rb-prose ol{list-style:decimal}
.rb-prose li + li{margin-top:.4em}
.rb-prose blockquote{
  padding:14px 18px;
  border-left:3px solid var(--rb-yellow);
  background:rgba(245,197,66,.07);
  color:var(--rb-mist);
}
.rb-prose code{
  font-family:var(--rb-font-num);font-size:.9em;
  padding:1px 6px;background:rgba(217,228,222,.1);color:var(--rb-cyan);
}
.rb-prose hr{border:0;border-top:1px solid var(--rb-line);margin:2em 0}
.rb-prose table{font-size:14px}
.rb-prose th,.rb-prose td{padding:9px 12px;border:1px solid var(--rb-line);text-align:left}
.rb-prose th{background:var(--rb-turf);color:var(--rb-white);font-weight:800;letter-spacing:.06em}

.rb-media{
  position:relative;display:block;width:100%;
  overflow:hidden;
  border:1px solid var(--rb-line);
  background:linear-gradient(135deg,rgba(31,90,69,.6),rgba(11,18,16,.92));
}
.rb-media::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    linear-gradient(to right,rgba(143,163,155,.14) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(143,163,155,.14) 1px,transparent 1px);
  background-size:28px 28px;
}
.rb-media__img{width:100%;height:100%;object-fit:cover}
.rb-media__cap{
  position:absolute;left:0;bottom:0;z-index:2;
  padding:6px 11px;
  background:rgba(11,18,16,.84);
  color:var(--rb-slate);
  font-size:11px;letter-spacing:.14em;
}
.rb-media--16x9{aspect-ratio:16/9}
.rb-media--4x3{aspect-ratio:4/3}
.rb-media--1x1{aspect-ratio:1/1}
.rb-media--wide{aspect-ratio:21/9}

.rb-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;
}

/* ---------- 7. 无障碍 ---------- */
:focus-visible{outline:2px solid var(--rb-cyan);outline-offset:2px}
.rb-nav__link:focus-visible{outline-offset:-2px}
.rb-skip:focus-visible{outline-color:var(--rb-night)}

@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;
  }
}