/* ============================================================
   b—sports 赛场 · /assets/site.css
   共享外壳：reset / 变量 / 中文排版 / 头部 / 页脚 / 基础组件
   ============================================================ */

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

:root{
  --ink-green:#0B2A22;
  --moss:#123A2E;
  --citrus:#FFC53D;
  --citrus-soft:#FFE3A3;
  --electric:#2FE0A8;
  --paper:#F4F1E8;
  --ash:#DAD5C7;
  --slate-blue:#5D7488;
  --slate:#141C22;
  --alert:#E2553D;

  --font-display:"Oswald","Barlow Condensed","Source Han Sans SC","Noto Sans SC",system-ui,sans-serif;
  --font-body:"Inter","Source Han Sans SC","Noto Sans SC",system-ui,-apple-system,sans-serif;
  --font-num:"Barlow Semi Condensed","IBM Plex Mono",ui-monospace,monospace;

  --hair:1px solid var(--ash);
  --hair-dark:1px solid rgba(244,241,232,.18);
  --maxw:1240px;
  --pad:clamp(18px,4vw,48px);
  --gap:clamp(14px,2.2vw,30px);
  --shift:0 14px 30px rgba(11,42,34,.16);
  --paper-shadow:8px 8px 0 rgba(11,42,34,.08);
}

body{
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.75;
  letter-spacing:.01em;
  color:var(--slate);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}

h1,h2,h3,h4{font-weight:500;line-height:1.2;letter-spacing:.005em;}
strong{font-weight:600;color:var(--ink-green);}
.num,.tabular{font-family:var(--font-num);font-variant-numeric:tabular-nums;font-feature-settings:"tnum" 1;}

::selection{background:var(--citrus);color:var(--ink-green);}

:focus-visible{outline:2px solid var(--citrus);outline-offset:2px;}

.visually-hidden{
  position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;
  overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0;
}

/* ---------- 容器与网格 ---------- */
.container{width:100%;max-width:var(--maxw);margin-inline:auto;padding-inline:var(--pad);}
.container--wide{max-width:1440px;}

.grid{display:grid;gap:var(--gap);grid-template-columns:1fr;}
.grid--2{grid-template-columns:repeat(auto-fit,minmax(260px,1fr));}
.grid--3{grid-template-columns:repeat(auto-fit,minmax(220px,1fr));}

@media (min-width:900px){
  .grid--asym{grid-template-columns:7fr 5fr;}
  .grid--asym-rev{grid-template-columns:8fr 4fr;}
  .grid--3{grid-template-columns:repeat(3,1fr);}
}

.divider{height:1px;background:var(--ash);border:0;margin:clamp(28px,4vw,56px) 0;}

.panel{background:var(--ink-green);color:var(--paper);padding-block:clamp(40px,6vw,84px);}
.panel--moss{background:var(--moss);}
.panel--paper{background:var(--paper);color:var(--slate);}
.panel .section-head{border-bottom-color:rgba(244,241,232,.22);}
.panel .section-head__title{color:var(--paper);}
.panel .section-head__note{color:rgba(244,241,232,.66);}
.panel p{color:rgba(244,241,232,.86);}

/* ---------- 跳转链接 ---------- */
.skip-link{
  position:absolute;left:12px;top:-64px;z-index:120;
  padding:12px 18px;background:var(--citrus);color:var(--ink-green);
  font-size:13px;letter-spacing:.12em;border:1px solid var(--ink-green);
  transition:top .18s ease;
}
.skip-link:focus{top:12px;}

/* ---------- 滚动进度（转播数据条） ---------- */
.scroll-progress{
  position:absolute;left:0;bottom:-3px;height:3px;width:100%;
  transform:scaleX(0);transform-origin:0 50%;
  background:linear-gradient(90deg,var(--citrus),var(--electric));
  pointer-events:none;
}

/* ============================================================
   头部：居中刊头 + 单行导航
   ============================================================ */
.site-header{position:relative;z-index:60;background:var(--ink-green);color:var(--paper);}

.masthead{
  display:grid;
  grid-template-columns:minmax(0,1fr) auto minmax(0,1fr);
  align-items:center;
  gap:var(--gap);
  padding:clamp(20px,3vw,38px) var(--pad) clamp(16px,2.4vw,30px);
  background-color:var(--ink-green);
  background-image:
    repeating-linear-gradient(90deg,rgba(244,241,232,.055) 0 1px,transparent 1px 58px),
    repeating-linear-gradient(0deg,rgba(244,241,232,.055) 0 1px,transparent 1px 58px);
  border-bottom:var(--hair-dark);
}

.masthead__rail{display:flex;flex-direction:column;gap:6px;min-width:0;}
.masthead__rail--right{align-items:flex-end;}
.masthead__meta{
  font-size:12px;letter-spacing:.14em;text-transform:uppercase;
  color:rgba(244,241,232,.62);
}
.masthead__year{
  font-family:var(--font-num);font-variant-numeric:tabular-nums;
  font-size:clamp(24px,3vw,38px);line-height:.9;letter-spacing:-.01em;
  color:var(--citrus);
}

.masthead__brand{display:flex;flex-direction:column;align-items:center;gap:7px;text-align:center;}
.brand-mark{
  font-family:var(--font-display);font-weight:400;
  font-size:clamp(26px,3.8vw,46px);line-height:1;letter-spacing:.03em;
  color:var(--paper);
}
.masthead__brand:hover .brand-mark{color:var(--citrus);}
.masthead__title{
  font-family:var(--font-display);font-weight:300;
  font-size:clamp(12px,1.2vw,15px);letter-spacing:.42em;text-indent:.42em;
  color:var(--citrus);
}
.masthead__note{font-size:12px;letter-spacing:.14em;color:rgba(244,241,232,.6);}

/* 导航条 */
.nav-band{background:var(--paper);border-bottom:3px solid var(--ink-green);}
.nav-band__inner{
  display:flex;align-items:center;justify-content:space-between;gap:14px;
  width:100%;max-width:var(--maxw);margin-inline:auto;padding-inline:var(--pad);
}
.nav-band__stamp{
  font-size:12px;letter-spacing:.14em;color:var(--slate-blue);
  white-space:nowrap;padding:6px 10px;border:var(--hair);
}
.site-nav{flex:1 1 auto;min-width:0;}
.site-nav__list{display:flex;flex-wrap:wrap;justify-content:center;gap:2px;}
.site-nav__link{
  display:block;padding:15px 16px;
  font-size:13px;letter-spacing:.14em;color:var(--slate);
  border-bottom:3px solid transparent;border-top:3px solid transparent;
  transition:background-color .18s ease,color .18s ease,border-color .18s ease;
}
.site-nav__link:hover{background:var(--citrus-soft);color:var(--ink-green);}
.site-nav__link[aria-current="page"]{
  color:var(--ink-green);font-weight:500;border-bottom-color:var(--citrus);
}

.nav-toggle{
  display:none;align-items:center;gap:10px;
  padding:10px 14px;border:var(--hair);
  font-size:12px;letter-spacing:.14em;color:var(--ink-green);
  transition:background-color .18s ease,color .18s ease,border-color .18s ease;
}
.nav-toggle__bars{position:relative;display:block;width:18px;height:12px;}
.nav-toggle__bars::before,
.nav-toggle__bars::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--ink-green);}
.nav-toggle__bars::before{top:0;}
.nav-toggle__bars::after{bottom:0;}
.nav-toggle[aria-expanded="true"]{background:var(--ink-green);color:var(--citrus);border-color:var(--ink-green);}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before,
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{background:var(--citrus);}

@media (max-width:900px){
  .masthead{grid-template-columns:1fr;gap:14px;padding-block:22px 18px;}
  .masthead__rail{flex-direction:row;align-items:center;justify-content:center;gap:14px;}
  .masthead__rail--right{justify-content:center;}
  .masthead__meta{letter-spacing:.1em;}
  .masthead__note{font-size:11px;}

  .nav-band__inner{flex-wrap:wrap;padding-block:10px;gap:10px;}
  .nav-toggle{display:inline-flex;order:1;}
  .nav-band__stamp{order:2;margin-left:auto;}
  .site-nav{order:3;flex:1 0 100%;display:none;}
  .site-nav[data-open]{display:block;}
  .site-nav__list{flex-direction:column;gap:0;}
  .site-nav__link{padding:16px 4px;border-bottom:1px solid var(--ash);border-top:0;}
  .site-nav__link[aria-current="page"]{border-bottom-color:var(--citrus);background:rgba(255,227,163,.35);}
}

@media (min-width:901px){
  .site-nav{display:block;}
}

/* ============================================================
   按钮
   ============================================================ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 20px;border:1px solid var(--ink-green);background:transparent;
  color:var(--ink-green);font-size:13px;font-weight:500;letter-spacing:.12em;
  cursor:pointer;transition:background-color .18s ease,color .18s ease,border-color .18s ease,transform .18s ease;
}
.btn:hover{transform:translateY(-2px);}
.btn--accent{background:var(--citrus);border-color:var(--citrus);color:var(--ink-green);}
.btn--accent:hover{background:var(--citrus-soft);border-color:var(--citrus-soft);}
.btn--ghost{background:transparent;border-color:var(--ash);color:var(--ink-green);}
.btn--ghost:hover{border-color:var(--citrus);background:var(--citrus-soft);}
.btn--onDark{background:transparent;border-color:rgba(244,241,232,.4);color:var(--paper);}
.btn--onDark:hover{border-color:var(--citrus);color:var(--citrus);}
.btn--block{width:100%;}
.btn--login{padding:11px 16px;font-size:12px;}

/* ============================================================
   章节头 / 编号索引
   ============================================================ */
.section-head{
  display:flex;flex-wrap:wrap;align-items:baseline;gap:10px 16px;
  padding-bottom:12px;margin-bottom:clamp(20px,3vw,32px);
  border-bottom:1px solid var(--ash);
}
.section-head__num{
  flex:0 0 auto;display:inline-block;
  font-family:var(--font-num);font-variant-numeric:tabular-nums;
  font-size:13px;letter-spacing:.14em;line-height:1.6;
  padding:3px 10px;background:var(--ink-green);color:var(--citrus);
}
.section-head__title{font-size:clamp(20px,2.2vw,28px);font-weight:500;color:var(--ink-green);}
.section-head__note{margin-left:auto;font-size:12px;letter-spacing:.14em;color:var(--slate-blue);}

.index-list{border-top:1px solid var(--ash);}
.index-list__item{
  display:flex;align-items:baseline;gap:14px;
  padding:12px 0;border-bottom:1px solid var(--ash);
}
.index-list__num{
  flex:0 0 auto;min-width:2.6em;
  font-family:var(--font-num);font-variant-numeric:tabular-nums;
  font-size:13px;letter-spacing:.08em;color:var(--citrus);
}
.index-list a{color:var(--slate);border-bottom:1px solid transparent;transition:border-color .18s ease,color .18s ease;}
.index-list a:hover{color:var(--ink-green);border-bottom-color:var(--citrus);}
.index-list__meta{margin-left:auto;font-size:12px;letter-spacing:.1em;color:var(--slate-blue);}

.breadcrumbs{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:12px;letter-spacing:.14em;color:var(--slate-blue);
}
.breadcrumbs a{border-bottom:1px solid var(--ash);transition:color .18s ease,border-color .18s ease;}
.breadcrumbs a:hover{color:var(--ink-green);border-bottom-color:var(--citrus);}
.breadcrumbs__sep{color:var(--ash);}

/* ============================================================
   卡片 / 数据 / 标签
   ============================================================ */
.card{
  position:relative;background:var(--paper);border:var(--hair);
  padding:clamp(18px,2.2vw,28px);
  transition:transform .2s ease,border-color .2s ease,box-shadow .2s ease;
}
.card--dark{background:var(--moss);color:var(--paper);border-color:rgba(244,241,232,.18);}
.card--stack{box-shadow:var(--paper-shadow);}
.card--lift:hover,.card--lift:focus-within{
  transform:translateY(-4px);border-color:var(--citrus);box-shadow:var(--shift);
}
.card__meta{font-size:12px;letter-spacing:.14em;color:var(--slate-blue);}
.card--dark .card__meta{color:rgba(244,241,232,.6);}
.card__title{font-size:20px;font-weight:500;margin-top:8px;}
.card__body{margin-top:10px;font-size:16px;line-height:1.75;}

.stat{display:block;}
.stat__value{
  display:block;font-family:var(--font-num);font-variant-numeric:tabular-nums;
  font-size:clamp(36px,5vw,64px);line-height:.92;letter-spacing:-.02em;
  color:var(--ink-green);
}
.stat--hero .stat__value{font-size:clamp(72px,10vw,152px);line-height:.86;}
.stat__label{display:block;margin-top:10px;font-size:12px;letter-spacing:.14em;color:var(--slate-blue);}
.stat--up .stat__value{color:var(--electric);}
.stat--down .stat__value{color:var(--alert);}
.panel .stat__value{color:var(--citrus);}
.panel .stat__label{color:rgba(244,241,232,.66);}

.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 10px;font-size:12px;letter-spacing:.14em;
  background:var(--citrus-soft);border:var(--hair);color:var(--ink-green);
}
.tag--line{background:transparent;}
.tag--ok{background:transparent;border-color:var(--electric);color:#0B7A5B;}
.tag--warn{background:transparent;border-color:var(--alert);color:var(--alert);}
.tag--dark{background:rgba(244,241,232,.08);border-color:rgba(244,241,232,.24);color:var(--paper);}

/* ---------- 数据表 ---------- */
.table-wrap{
  width:100%;overflow-x:auto;border:var(--hair);background:var(--paper);
  -webkit-overflow-scrolling:touch;
}
.table-wrap:focus-visible{outline:2px solid var(--citrus);outline-offset:2px;}
.data-table{width:100%;border-collapse:collapse;font-size:15px;min-width:560px;}
.data-table caption{
  caption-side:top;text-align:left;padding:12px 16px;
  font-size:12px;letter-spacing:.14em;color:var(--slate-blue);border-bottom:1px solid var(--ash);
}
.data-table th{
  text-align:left;padding:12px 16px;font-size:12px;font-weight:500;
  letter-spacing:.14em;color:var(--slate-blue);border-bottom:1px solid var(--ash);
  background:rgba(218,213,199,.35);white-space:nowrap;
}
.data-table td{padding:12px 16px;border-bottom:1px solid var(--ash);}
.data-table tbody tr{transition:background-color .15s ease;}
.data-table tbody tr:hover{background:var(--citrus-soft);}
.data-table tbody tr:last-child td{border-bottom:0;}
.data-table td.num,.data-table th.num{font-family:var(--font-num);font-variant-numeric:tabular-nums;text-align:right;}
.data-table td.is-up{color:#0B7A5B;}
.data-table td.is-down{color:var(--alert);}

/* ---------- 折叠问答 ---------- */
.faq-item{border:var(--hair);background:var(--paper);transition:border-color .18s ease;}
.faq-item + .faq-item{margin-top:-1px;}
.faq-item:hover{border-color:var(--citrus);}
.faq-item summary{
  display:flex;align-items:baseline;gap:12px;
  padding:16px 20px;font-size:17px;font-weight:500;color:var(--slate);
  cursor:pointer;list-style:none;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::before{
  content:"0";
  font-family:var(--font-num);font-size:12px;line-height:1.6;
  padding:2px 8px;background:var(--ink-green);color:var(--citrus);
  flex:0 0 auto;
}
.faq-item[open] summary{color:var(--ink-green);}
.faq-item[open] summary::before{content:"—";}
.faq-item__body{padding:0 20px 20px 20px;max-width:68ch;color:var(--slate);}

/* ---------- 无后端筛选 ---------- */
.filter{display:flex;flex-wrap:wrap;gap:8px;}
.filter__option input{position:absolute;opacity:0;width:1px;height:1px;pointer-events:none;}
.filter__option label{
  display:inline-block;padding:9px 14px;border:var(--hair);
  font-size:12px;letter-spacing:.14em;color:var(--slate);
  cursor:pointer;transition:background-color .18s ease,color .18s ease,border-color .18s ease;
}
.filter__option label:hover{border-color:var(--citrus);background:var(--citrus-soft);}
.filter__option input:checked + label{background:var(--ink-green);border-color:var(--ink-green);color:var(--citrus);}
.filter__option input:focus-visible + label{outline:2px solid var(--citrus);outline-offset:2px;}

/* ============================================================
   图文容器（页面阶段放入图片）
   ============================================================ */
.media-frame{
  position:relative;display:block;width:100%;overflow:hidden;
  aspect-ratio:16/9;border:var(--hair);
  background:linear-gradient(160deg,var(--ink-green) 0%,var(--moss) 62%,#0E2E25 100%);
}
.media-frame::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    repeating-linear-gradient(90deg,rgba(244,241,232,.07) 0 1px,transparent 1px 44px),
    repeating-linear-gradient(0deg,rgba(244,241,232,.07) 0 1px,transparent 1px 44px);
}
.media-frame > img{width:100%;height:100%;object-fit:cover;}
.media-frame--wide{aspect-ratio:21/9;}
.media-frame--square{aspect-ratio:1/1;}
.media-frame--tall{aspect-ratio:3/4;}
.media-frame--cut{clip-path:polygon(0 0,100% 0,100% calc(100% - 26px),calc(100% - 26px) 100%,0 100%);}
.media-frame__caption{
  position:relative;z-index:1;margin-top:10px;
  font-size:12px;letter-spacing:.14em;color:var(--slate-blue);
}

/* ---------- 正文 ---------- */
.prose{max-width:68ch;font-size:17px;line-height:1.75;}
.prose p + p{margin-top:1.05em;}
.prose ul,.prose ol{margin:1em 0;padding-left:1.4em;list-style:disc;}
.prose ol{list-style:decimal;}
.prose li{margin-bottom:.4em;}
.prose h2{font-size:clamp(22px,2.6vw,32px);margin:1.6em 0 .6em;}
.prose h3{font-size:20px;margin:1.4em 0 .5em;}
.prose a{color:var(--ink-green);border-bottom:1px solid var(--citrus);}
.prose a:hover{background:var(--citrus-soft);}
.prose blockquote{
  margin:1.4em 0;padding:14px 18px;border-left:3px solid var(--citrus);
  background:rgba(218,213,199,.35);
}

/* ============================================================
   页脚
   ============================================================ */
.site-footer{
  position:relative;background:var(--ink-green);color:var(--paper);
  border-top:3px solid var(--citrus);
  padding-block:clamp(36px,5vw,72px) clamp(20px,3vw,32px);
  background-image:
    repeating-linear-gradient(90deg,rgba(244,241,232,.05) 0 1px,transparent 1px 64px),
    repeating-linear-gradient(0deg,rgba(244,241,232,.05) 0 1px,transparent 1px 64px);
}
.footer__grid{display:grid;gap:clamp(22px,3vw,36px);grid-template-columns:1fr;}
.footer__brand-line{
  font-family:var(--font-display);font-weight:400;
  font-size:clamp(22px,2.6vw,32px);line-height:1.1;color:var(--paper);
}
.footer__statement{
  margin-top:12px;max-width:34ch;font-size:15px;line-height:1.75;
  color:rgba(244,241,232,.72);
}
.footer__cta{margin-top:18px;}
.footer__heading{
  font-size:12px;font-weight:500;letter-spacing:.14em;
  color:var(--citrus);padding-bottom:10px;margin-bottom:12px;
  border-bottom:1px solid rgba(244,241,232,.2);
}
.footer__links li + li{margin-top:9px;}
.footer__link{
  font-size:15px;color:rgba(244,241,232,.82);
  border-bottom:1px solid transparent;
  transition:color .18s ease,border-color .18s ease;
}
.footer__link:hover{color:var(--citrus);border-bottom-color:var(--citrus);}
.footer__contact-list{display:flex;flex-direction:column;gap:10px;}
.footer__contact-list li{display:flex;flex-direction:column;gap:2px;}
.footer__label{font-size:12px;letter-spacing:.14em;color:rgba(244,241,232,.55);}
.footer__value{
  font-size:15px;color:var(--paper);word-break:break-word;
  font-variant-numeric:tabular-nums;
}
.footer__note{
  margin-top:14px;font-size:13px;line-height:1.7;
  color:rgba(244,241,232,.6);max-width:34ch;
}
.footer__legal{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px 24px;
  margin-top:clamp(28px,4vw,52px);padding-top:18px;
  border-top:1px solid rgba(244,241,232,.18);
  font-size:12px;letter-spacing:.14em;color:rgba(244,241,232,.62);
}
.footer__icp{color:var(--citrus);}
.footer__copy{font-variant-numeric:tabular-nums;}

@media (min-width:640px){
  .footer__grid{grid-template-columns:repeat(2,1fr);}
  .footer__brand{grid-column:1 / -1;}
}
@media (min-width:1024px){
  .footer__grid{grid-template-columns:1.6fr 1fr 1fr 1fr 1.3fr;}
  .footer__brand{grid-column:auto;}
  .footer__legal{justify-content:space-between;}
}

/* ============================================================
   进入视口显现
   ============================================================ */
.has-js [data-reveal]{
  opacity:0;transform:translateY(14px);
  transition:opacity .5s ease,transform .5s ease;
}
.has-js [data-reveal].is-visible{opacity:1;transform:none;}

/* ============================================================
   降低动效
   ============================================================ */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{
    animation-duration:.001ms!important;
    animation-iteration-count:1!important;
    transition-duration:.001ms!important;
  }
  .has-js [data-reveal]{opacity:1;transform:none;}
  .card--lift:hover,.card--lift:focus-within,.btn:hover{transform:none;}
}