/* ===== BOWAN赛场 · 共享样式 /assets/site.css ===== */

:root{
  --bw-blue:#0A1128;
  --bw-deep:#073B2E;
  --bw-green:#0B6E4F;
  --bw-orange:#FF6B35;
  --bw-yellow:#F9F871;
  --bw-cyan:#2BD9C3;
  --bw-white:#F5F7FA;
  --bw-line:#1E2A45;
  --bw-ink:#06101F;
  --bw-muted:rgba(245,247,250,.68);
  --bw-dim:rgba(245,247,250,.42);
  --bw-font-body:system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",sans-serif;
  --bw-font-display:"Impact","Haettenschweiler","Arial Narrow","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --bw-font-mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Courier New",monospace;
  --bw-wrap:1240px;
  --bw-gutter:clamp(16px,4vw,40px);
  --bw-ease:180ms cubic-bezier(.2,.7,.3,1);
}

/* reset */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;background:var(--bw-blue);color:var(--bw-white);font-family:var(--bw-font-body);font-size:16px;line-height:1.75;letter-spacing:.01em}
h1,h2,h3,h4,p,ul,ol,dl,dd,figure,blockquote{margin:0}
ul,ol{padding:0;list-style:none}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
img{max-width:100%;display:block}
:focus-visible{outline:2px solid var(--bw-yellow);outline-offset:3px}

/* ===== 中文排版与通用文本 ===== */
.bw-display{font-family:var(--bw-font-display);font-weight:900;letter-spacing:-.01em;line-height:1.04;text-transform:uppercase}
.bw-mono{font-family:var(--bw-font-mono);font-variant-numeric:tabular-nums;letter-spacing:.06em}
.bw-eyebrow{font-family:var(--bw-font-mono);font-size:12px;letter-spacing:.18em;text-transform:uppercase;color:var(--bw-cyan);display:inline-flex;align-items:center;gap:8px}
.bw-eyebrow::before{content:"";width:18px;height:2px;background:var(--bw-orange);display:inline-block}
.bw-rule{height:1px;background:var(--bw-line);border:0;margin:0}

/* ===== 布局容器 ===== */
.bw-container{width:min(var(--bw-wrap),calc(100% - 2 * var(--bw-gutter)));margin-inline:auto}
.bw-section{padding-block:clamp(40px,6vw,84px)}
.bw-split{display:grid;grid-template-columns:1fr;gap:clamp(20px,3vw,40px)}
.bw-grid{display:grid;grid-template-columns:1fr;gap:clamp(14px,2vw,24px)}
.bw-grid--dense{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:10px}
@media (min-width:760px){
  .bw-split{grid-template-columns:minmax(0,1.15fr) minmax(0,1fr)}
  .bw-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (min-width:1080px){
  .bw-split{grid-template-columns:minmax(0,1.35fr) minmax(0,1fr)}
  .bw-grid{grid-template-columns:repeat(3,minmax(0,1fr))}
}

/* ===== 按钮 ===== */
.bw-btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;
  padding:12px 20px;border:1px solid var(--bw-line);border-radius:0;
  font-family:var(--bw-font-mono);font-size:13px;letter-spacing:.14em;
  color:var(--bw-white);background:transparent;
  transition:background var(--bw-ease),color var(--bw-ease),border-color var(--bw-ease),transform var(--bw-ease)}
.bw-btn:hover{transform:translateX(2px)}
.bw-btn--primary{background:var(--bw-orange);border-color:var(--bw-orange);color:#160A03;font-weight:700}
.bw-btn--primary:hover{background:var(--bw-yellow);border-color:var(--bw-yellow)}
.bw-btn--live{background:var(--bw-green);border-color:var(--bw-green);color:var(--bw-white);font-weight:700}
.bw-btn--live:hover{background:#0E8A63;border-color:var(--bw-cyan)}
.bw-btn--ghost{border-color:var(--bw-line);color:var(--bw-muted)}
.bw-btn--ghost:hover{color:var(--bw-white);border-color:var(--bw-cyan)}

.bw-pulse{width:7px;height:7px;border-radius:50%;background:var(--bw-yellow);box-shadow:0 0 0 0 rgba(249,248,113,.7);animation:bw-pulse 2.4s ease-out infinite;flex:none}
@keyframes bw-pulse{
  0%{box-shadow:0 0 0 0 rgba(249,248,113,.55)}
  70%{box-shadow:0 0 0 7px rgba(249,248,113,0)}
  100%{box-shadow:0 0 0 0 rgba(249,248,113,0)}
}

/* ===== 面板 / 卡片 / 标签 ===== */
.bw-panel{position:relative;background:linear-gradient(160deg,rgba(7,59,46,.5),rgba(10,17,40,.9));border:1px solid var(--bw-line);padding:clamp(16px,2.4vw,26px)}
.bw-panel--green{background:linear-gradient(160deg,var(--bw-green),var(--bw-deep));border-color:rgba(43,217,195,.32)}
.bw-panel--angle::after{content:"";position:absolute;right:0;top:0;width:34px;height:34px;background:var(--bw-orange);clip-path:polygon(100% 0,100% 100%,0 0);opacity:.85}
.bw-chip{display:inline-flex;align-items:center;gap:6px;padding:4px 10px;border:1px solid var(--bw-line);
  font-family:var(--bw-font-mono);font-size:11px;letter-spacing:.14em;color:var(--bw-cyan);background:rgba(43,217,195,.06)}
.bw-chip--hot{color:var(--bw-yellow);border-color:rgba(249,248,113,.4);background:rgba(249,248,113,.08)}

/* ===== 面包屑 ===== */
.bw-breadcrumb{font-family:var(--bw-font-mono);font-size:12px;letter-spacing:.1em;color:var(--bw-dim);padding-block:14px}
.bw-breadcrumb ol{display:flex;flex-wrap:wrap;gap:8px}
.bw-breadcrumb li:not(:last-child)::after{content:"/";margin-left:8px;color:var(--bw-line)}
.bw-breadcrumb a:hover{color:var(--bw-cyan)}

/* ===== 图片容器基础规则（页面阶段放入图片占位） ===== */
.bw-media{position:relative;overflow:hidden;background:var(--bw-deep);border:1px solid var(--bw-line);isolation:isolate}
.bw-media img{width:100%;height:100%;object-fit:cover;display:block;filter:saturate(1.05) contrast(1.03)}
.bw-media::after{content:"";position:absolute;inset:0;background:linear-gradient(200deg,rgba(10,17,40,0) 45%,rgba(10,17,40,.72));pointer-events:none}
.bw-media--wide{aspect-ratio:16/9}
.bw-media--tall{aspect-ratio:3/4}
.bw-media--square{aspect-ratio:1/1}
.bw-media__cap{position:absolute;left:12px;bottom:10px;z-index:2;font-family:var(--bw-font-mono);font-size:11px;letter-spacing:.12em;color:var(--bw-white);background:rgba(10,17,40,.7);padding:3px 8px;border-left:2px solid var(--bw-orange)}

/* ===== 动效协议 ===== */
.bw-js [data-reveal]{opacity:0;transform:translateY(16px);transition:opacity .5s ease,transform .5s ease}
.bw-js [data-reveal].is-visible{opacity:1;transform:none}

/* ===== SKIP LINK ===== */
.bw-skip{position:absolute;left:12px;top:-80px;z-index:120;
  background:var(--bw-yellow);color:#0A1128;padding:10px 16px;
  font-family:var(--bw-font-mono);font-size:13px;letter-spacing:.08em}
.bw-skip:focus{top:10px}

/* ===== HEADER ===== */
.bw-header{position:sticky;top:0;z-index:80;background:rgba(10,17,40,.94);
  border-bottom:1px solid var(--bw-line);backdrop-filter:blur(10px)}

/* 顶部赛事指令轨 */
.bw-rail{background:
    repeating-linear-gradient(135deg,rgba(11,110,79,.30) 0 6px,rgba(11,110,79,0) 6px 14px),
    linear-gradient(90deg,var(--bw-deep),var(--bw-blue) 65%);
  border-bottom:1px solid rgba(43,217,195,.18);overflow:hidden}
.bw-rail__inner{width:min(var(--bw-wrap),calc(100% - 2 * var(--bw-gutter)));margin-inline:auto;
  display:flex;align-items:center;gap:10px;height:30px;
  font-family:var(--bw-font-mono);font-size:11px;letter-spacing:.14em;
  color:var(--bw-muted);white-space:nowrap;overflow:hidden}
.bw-rail__live{display:inline-flex;align-items:center;gap:7px;color:var(--bw-yellow)}
.bw-rail__sep{color:var(--bw-line)}
.bw-rail__code{margin-left:auto;color:var(--bw-cyan);letter-spacing:.22em;font-size:10px}

/* 主体条 */
.bw-header__inner{width:min(var(--bw-wrap),calc(100% - 2 * var(--bw-gutter)));margin-inline:auto;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  min-height:64px;padding-block:8px}

.bw-brand{display:inline-flex;align-items:center;gap:12px;flex:none}
.bw-brand__mark{width:40px;height:40px;display:grid;place-items:center;flex:none;
  background:linear-gradient(150deg,var(--bw-green),var(--bw-orange));
  clip-path:polygon(0 0,100% 0,100% 72%,72% 100%,0 100%);
  font-family:var(--bw-font-display);font-weight:900;font-size:15px;letter-spacing:.02em;
  color:#04121C;text-transform:uppercase}
.bw-brand__text{display:flex;flex-direction:column;line-height:1.15}
.bw-brand__name{font-weight:800;font-size:17px;letter-spacing:.04em;color:var(--bw-white)}
.bw-brand__tag{font-family:var(--bw-font-mono);font-size:10px;letter-spacing:.18em;color:var(--bw-dim);margin-top:3px}
.bw-brand:hover .bw-brand__name{color:var(--bw-yellow)}

/* 桌面导航 */
.bw-nav{display:flex;align-items:center;gap:18px}
.bw-nav__list{display:flex;align-items:center;gap:2px}
.bw-nav__link{position:relative;display:inline-flex;align-items:baseline;gap:6px;
  padding:9px 11px;font-size:13.5px;letter-spacing:.03em;color:var(--bw-muted);
  transition:color var(--bw-ease),background var(--bw-ease)}
.bw-nav__idx{font-family:var(--bw-font-mono);font-size:10px;letter-spacing:.08em;color:var(--bw-dim);transition:color var(--bw-ease)}
.bw-nav__link::after{content:"";position:absolute;left:11px;right:11px;bottom:2px;height:2px;
  background:var(--bw-orange);transform:scaleX(0);transform-origin:left;transition:transform var(--bw-ease)}
.bw-nav__link:hover{color:var(--bw-white);background:rgba(11,110,79,.16)}
.bw-nav__link:hover::after{transform:scaleX(1)}
.bw-nav__link:hover .bw-nav__idx{color:var(--bw-cyan)}
.bw-nav__link[aria-current="page"]{color:var(--bw-white);background:rgba(11,110,79,.22)}
.bw-nav__link[aria-current="page"]::after{transform:scaleX(1)}
.bw-nav__link[aria-current="page"] .bw-nav__idx{color:var(--bw-orange)}
.bw-nav__cta{flex:none}

/* 移动按钮 */
.bw-navtoggle{display:none;align-items:center;gap:8px;padding:8px 10px;
  border:1px solid var(--bw-line);color:var(--bw-white);
  font-family:var(--bw-font-mono);font-size:12px;letter-spacing:.14em;
  transition:border-color var(--bw-ease),background var(--bw-ease)}
.bw-navtoggle:hover{border-color:var(--bw-cyan);background:rgba(43,217,195,.08)}
.bw-navtoggle__bars{display:grid;gap:3px;width:16px}
.bw-navtoggle__bars span{display:block;height:2px;background:var(--bw-white);transition:transform var(--bw-ease),opacity var(--bw-ease)}
.bw-navtoggle[aria-expanded="true"] .bw-navtoggle__bars span:nth-child(1){transform:translateY(5px) rotate(45deg)}
.bw-navtoggle[aria-expanded="true"] .bw-navtoggle__bars span:nth-child(2){opacity:0}
.bw-navtoggle[aria-expanded="true"] .bw-navtoggle__bars span:nth-child(3){transform:translateY(-5px) rotate(-45deg)}
.bw-navtoggle[aria-expanded="true"]{border-color:var(--bw-orange);background:rgba(255,107,53,.12)}

/* 滚动进度 */
.bw-progress{position:absolute;left:0;right:0;bottom:-1px;height:2px;background:rgba(30,42,69,.7);pointer-events:none}
.bw-progress__bar{display:block;height:100%;width:0;
  background:linear-gradient(90deg,var(--bw-green),var(--bw-cyan) 55%,var(--bw-orange));}

/* 移动端导航面板 */
@media (max-width:900px){
  .bw-navtoggle{display:inline-flex}
  .bw-nav{position:absolute;left:0;right:0;top:100%;z-index:90;
    display:none;flex-direction:column;align-items:stretch;gap:0;
    background:linear-gradient(180deg,#0A1128 0%,#08192B 100%);
    border-top:1px solid var(--bw-line);border-bottom:1px solid var(--bw-line);
    padding:10px var(--bw-gutter) 18px;
    max-height:calc(100vh - 90px);overflow-y:auto;
    box-shadow:0 24px 48px rgba(0,0,0,.5)}
  .bw-header[data-nav-open="true"] .bw-nav{display:flex;animation:bw-panel-in .2s ease-out}
  .bw-nav__list{flex-direction:column;align-items:stretch;gap:0}
  .bw-nav__item + .bw-nav__item{border-top:1px solid rgba(30,42,69,.7)}
  .bw-nav__link{display:flex;align-items:center;gap:12px;padding:14px 4px;font-size:15px;color:var(--bw-white)}
  .bw-nav__link::after{left:0;right:auto;bottom:6px;width:28px}
  .bw-nav__link[aria-current="page"]{background:transparent;box-shadow:inset 3px 0 0 var(--bw-orange);padding-left:12px}
  .bw-nav__cta{margin-top:14px;width:100%;padding-block:14px}
  @keyframes bw-panel-in{from{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:none}}
}
@media (max-width:420px){
  .bw-brand__tag{display:none}
  .bw-rail__item--wide,.bw-rail__sep--wide{display:none}
}

/* ===== FOOTER ===== */
.bw-footer{position:relative;margin-top:clamp(40px,7vw,96px);
  background:linear-gradient(180deg,#0A1128 0%,#081326 55%,#06101F 100%);
  border-top:1px solid var(--bw-line)}
.bw-footer::before{content:"";position:absolute;left:0;right:0;top:0;height:3px;
  background:linear-gradient(90deg,var(--bw-green) 0%,var(--bw-cyan) 38%,var(--bw-orange) 72%,var(--bw-yellow) 100%)}
.bw-footer__inner{width:min(var(--bw-wrap),calc(100% - 2 * var(--bw-gutter)));margin-inline:auto;
  display:grid;grid-template-columns:1fr;gap:clamp(24px,4vw,48px);
  padding-block:clamp(32px,5vw,64px)}
.bw-footer__logo{font-family:var(--bw-font-display);font-weight:900;font-size:clamp(26px,4vw,38px);
  letter-spacing:.01em;line-height:1;color:var(--bw-white)}
.bw-footer__line{margin-top:10px;font-family:var(--bw-font-mono);font-size:12px;letter-spacing:.12em;color:var(--bw-cyan)}
.bw-footer__note{margin-top:14px;max-width:34ch;font-size:14px;color:var(--bw-muted);line-height:1.8}
.bw-footer__brand .bw-btn{margin-top:20px}
.bw-footer__head{font-family:var(--bw-font-mono);font-size:11px;letter-spacing:.22em;
  text-transform:uppercase;color:var(--bw-dim);padding-bottom:10px;border-bottom:1px solid var(--bw-line)}
.bw-footer__links{margin-top:14px;display:grid;gap:2px}
.bw-footer__link{display:flex;align-items:baseline;gap:10px;padding:8px 0;font-size:14px;
  color:var(--bw-muted);transition:color var(--bw-ease),padding-left var(--bw-ease)}
.bw-footer__link .bw-mono{font-size:11px;color:var(--bw-line);transition:color var(--bw-ease)}
.bw-footer__link:hover{color:var(--bw-white);padding-left:6px}
.bw-footer__link:hover .bw-mono{color:var(--bw-orange)}
.bw-contact{margin-top:14px;display:grid;gap:10px}
.bw-contact__row{display:grid;grid-template-columns:52px 1fr;gap:10px;align-items:start;
  padding-bottom:10px;border-bottom:1px dashed rgba(30,42,69,.9)}
.bw-contact dt{font-family:var(--bw-font-mono);font-size:11px;letter-spacing:.14em;color:var(--bw-dim);padding-top:3px}
.bw-contact dd{font-family:var(--bw-font-mono);font-size:13px;line-height:1.6;color:var(--bw-white);word-break:break-word}
.bw-footer__tips{margin-top:14px;font-size:12.5px;line-height:1.75;color:var(--bw-dim)}
.bw-legal{border-top:1px solid var(--bw-line);background:rgba(6,16,31,.8)}
.bw-legal__inner{width:min(var(--bw-wrap),calc(100% - 2 * var(--bw-gutter)));margin-inline:auto;
  display:flex;flex-wrap:wrap;align-items:center;gap:8px 20px;
  padding-block:18px;font-family:var(--bw-font-mono);font-size:11.5px;letter-spacing:.1em;color:var(--bw-dim)}
.bw-legal__links{display:flex;flex-wrap:wrap;gap:8px 18px;margin-left:auto}
.bw-legal__links a{color:var(--bw-dim);border-bottom:1px solid transparent;transition:color var(--bw-ease),border-color var(--bw-ease)}
.bw-legal__links a:hover{color:var(--bw-yellow);border-color:var(--bw-yellow)}

@media (min-width:760px){
  .bw-footer__inner{grid-template-columns:minmax(0,1.3fr) minmax(0,.85fr) minmax(0,1fr)}
}

/* ===== 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}
  .bw-js [data-reveal]{opacity:1;transform:none}
  .bw-btn:hover{transform:none}
}