/* =========================================================
   博澳体育主站 · 共享样式 /assets/site.css
   气质：深夜球场电子记分牌
   ========================================================= */

/* ---------- 01 设计令牌 ---------- */
:root{
  --bg:#0B1F1A;
  --bg-deep:#121513;
  --panel:#14342B;
  --panel-2:#173C31;
  --line:#2A4A3F;
  --line-soft:rgba(42,74,63,.55);
  --text:#E8F1EC;
  --mute:#B9C7BF;
  --fog:#6FA893;
  --lime:#C6FF3D;
  --amber:#FFA53B;
  --shadow:0 18px 42px rgba(0,0,0,.45);
  --shadow-soft:0 6px 18px rgba(0,0,0,.32);
  --ease:cubic-bezier(.2,.7,.3,1);
  --mono:ui-monospace,"SFMono-Regular",Menlo,Consolas,"Liberation Mono",monospace;
  --sans:system-ui,-apple-system,"Segoe UI","Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --wrap:1200px;
  --gutter:clamp(16px,4vw,32px);
  --header-h:68px;
}
@media (min-width:721px){:root{--header-h:74px}}

/* ---------- 02 重置 ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,h6,p,ul,ol,li,figure,blockquote,dl,dd{margin:0}
ul,ol{padding:0;list-style:none}
img,svg,video{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
button{background:none;border:0;padding:0;cursor:pointer}
table{border-collapse:collapse;width:100%}
:focus-visible{outline:2px solid var(--amber);outline-offset:3px;border-radius:1px}

/* ---------- 03 基础排版 ---------- */
body{
  min-height:100vh;
  padding-top:var(--header-h);
  background-color:var(--bg);
  background-image:
    radial-gradient(1180px 520px at 78% -14%, rgba(198,255,61,.10), transparent 62%),
    radial-gradient(900px 460px at 4% 6%, rgba(255,165,59,.075), transparent 60%),
    linear-gradient(rgba(42,74,63,.28) 1px, transparent 1px),
    linear-gradient(90deg, rgba(42,74,63,.28) 1px, transparent 1px);
  background-size:auto,auto,64px 64px,64px 64px;
  background-position:0 0,0 0,-1px -1px,-1px -1px;
  color:var(--text);
  font-family:var(--sans);
  font-size:17px;
  font-weight:400;
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
body.nav-open{overflow:hidden}
h1,h2,h3,h4,h5,h6{font-weight:800;line-height:1.18;letter-spacing:-.01em;color:var(--text);word-break:break-word}
h1{font-size:clamp(32px,4.4vw,64px);letter-spacing:-.02em}
h2{font-size:clamp(26px,3.1vw,42px)}
h3{font-size:clamp(19px,2vw,26px)}
h4{font-size:18px}
p{word-break:break-word}
strong,b{color:var(--text);font-weight:700}
.num,.mono,code,kbd,samp{font-family:var(--mono);font-variant-numeric:tabular-nums}
.num{color:var(--lime);font-weight:600;letter-spacing:.02em}
.mute{color:var(--mute)}
#main-content{display:block;scroll-margin-top:calc(var(--header-h) + 14px)}

/* ---------- 04 布局容器与网格 ---------- */
.wrap{width:100%;max-width:var(--wrap);margin-inline:auto;padding-inline:var(--gutter)}
.grid{display:grid;gap:clamp(16px,2.4vw,28px)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--4{grid-template-columns:repeat(4,minmax(0,1fr))}
.grid--sidebar{grid-template-columns:minmax(0,1fr) minmax(0,320px);align-items:start}
.hero-overlay{margin-top:calc(var(--header-h) * -1);padding-top:calc(var(--header-h) + clamp(36px,7vw,96px))}

/* ---------- 05 跳转链接 ---------- */
.skip-link{
  position:absolute;left:12px;top:-72px;z-index:200;
  padding:10px 18px;border-radius:2px;
  background:var(--lime);color:#08150F;
  font-family:var(--mono);font-size:13px;font-weight:700;letter-spacing:.06em;
  transition:top .18s var(--ease);
}
.skip-link:focus{top:12px}

/* ---------- 06 页头 ---------- */
.site-header{
  position:fixed;inset:0 0 auto 0;z-index:80;
  background:transparent;
  border-bottom:1px solid transparent;
  transition:background-color .22s var(--ease),border-color .22s var(--ease);
}
.site-header[data-scrolled="true"]{
  background:rgba(11,31,26,.94);
  border-bottom-color:var(--line);
  backdrop-filter:blur(10px) saturate(1.06);
  -webkit-backdrop-filter:blur(10px) saturate(1.06);
}
.header__inner{display:flex;align-items:center;gap:clamp(12px,2vw,26px);height:var(--header-h)}
.header__rule{
  position:absolute;left:0;bottom:-1px;height:2px;width:min(520px,52%);
  background:linear-gradient(90deg,var(--lime),var(--amber) 55%,transparent);
  opacity:.85;pointer-events:none;
}

/* 品牌块 */
.brand{display:inline-flex;align-items:center;gap:12px;flex:0 0 auto}
.brand__mark{
  display:grid;place-items:center;flex:0 0 auto;
  width:38px;height:38px;
  border:1px solid var(--line);background:var(--panel);
  color:var(--lime);box-shadow:inset 0 0 0 1px rgba(198,255,61,.08);
  font-family:var(--mono);font-size:13px;font-weight:700;letter-spacing:.06em;
  transition:background-color .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.brand__text{display:flex;flex-direction:column;line-height:1.14}
.brand__name{font-size:17px;font-weight:800;letter-spacing:.08em}
.brand__sub{font-family:var(--mono);font-size:10px;letter-spacing:.16em;color:var(--fog);text-transform:uppercase}
.brand:hover .brand__mark{background:var(--lime);border-color:var(--lime);color:#08150F}
.brand--footer .brand__mark{width:34px;height:34px}
.brand--footer .brand__name{font-size:16px}

/* 移动菜单按钮 */
.nav-toggle{
  display:none;align-items:center;gap:10px;margin-left:auto;
  padding:9px 13px;border:1px solid var(--line);background:rgba(20,52,43,.62);
  color:var(--text);font-family:var(--mono);font-size:11px;letter-spacing:.16em;text-transform:uppercase;
  transition:border-color .18s var(--ease),color .18s var(--ease),background-color .18s var(--ease);
}
.nav-toggle:hover{border-color:var(--lime);color:var(--lime)}
.nav-toggle__bars{position:relative;display:block;width:18px;height:2px;background:currentColor}
.nav-toggle__bars::before,.nav-toggle__bars::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:currentColor;
  transition:transform .2s var(--ease),opacity .2s var(--ease);
}
.nav-toggle__bars::before{top:-6px}
.nav-toggle__bars::after{top:6px}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars{background:transparent}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before{transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{transform:translateY(-6px) rotate(-45deg)}

/* 主导航 */
.site-nav{display:flex;align-items:center;gap:clamp(10px,1.8vw,26px);margin-left:auto}
.site-nav__list{display:flex;align-items:center;gap:clamp(8px,1.4vw,20px)}
.site-nav__link{
  position:relative;display:inline-block;padding:12px 2px;
  font-size:14.5px;font-weight:500;letter-spacing:.04em;color:var(--mute);
  transition:color .18s var(--ease);
}
.site-nav__link::after{
  content:"";position:absolute;left:0;right:100%;bottom:4px;height:2px;background:var(--lime);
  transition:right .2s var(--ease);
}
.site-nav__link:hover,.site-nav__link:focus-visible{color:var(--text)}
.site-nav__link:hover::after,.site-nav__link:focus-visible::after{right:0}
.site-nav__link[aria-current="page"]{color:var(--lime)}
.site-nav__link[aria-current="page"]::after{right:0;background:var(--lime)}

/* 快捷轴 */
.quick-axis{display:flex;align-items:center;gap:10px;padding-left:clamp(10px,1.6vw,22px);border-left:1px solid var(--line)}
.quick-axis__label{font-family:var(--mono);font-size:10px;letter-spacing:.18em;color:var(--fog);text-transform:uppercase;white-space:nowrap}
.quick-axis__list{display:flex;align-items:center;gap:6px}
.quick-axis__link{
  display:inline-block;padding:5px 10px;border:1px solid var(--line);
  font-family:var(--mono);font-size:12px;letter-spacing:.06em;color:var(--mute);
  transition:border-color .18s var(--ease),color .18s var(--ease),background-color .18s var(--ease);
}
.quick-axis__link:hover,.quick-axis__link:focus-visible{
  border-color:var(--amber);color:var(--amber);background:rgba(255,165,59,.09);
}

/* ---------- 07 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(56px,8vw,120px);
  background:var(--bg-deep);
  border-top:1px solid var(--line);
  color:var(--mute);font-size:15px;
}
.site-footer::before{
  content:"";position:absolute;top:-1px;left:0;height:2px;width:min(440px,44%);
  background:linear-gradient(90deg,var(--lime),var(--amber));
}
.footer__grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1.5fr;
  gap:clamp(24px,4vw,52px);
  padding-block:clamp(40px,6vw,72px) clamp(28px,4vw,46px);
}
.footer__col{display:flex;flex-direction:column;gap:12px;min-width:0}
.footer__col--brand{gap:14px}
.footer__tagline{font-size:15px;line-height:1.7;color:var(--mute);max-width:34ch}
.footer__stat{
  font-family:var(--mono);font-size:12.5px;letter-spacing:.06em;color:var(--fog);line-height:1.9;
  padding-top:14px;border-top:1px dashed var(--line);
}
.footer__stat .num{font-size:16px}
.footer__title{
  font-family:var(--mono);font-size:11px;font-weight:600;
  letter-spacing:.2em;text-transform:uppercase;color:var(--lime);margin-bottom:4px;
}
.footer__list{display:flex;flex-direction:column;gap:9px}
.footer__link{
  display:inline-block;font-size:14.5px;color:var(--mute);
  transition:color .18s var(--ease),box-shadow .18s var(--ease);
}
.footer__link:hover,.footer__link:focus-visible{color:var(--text);box-shadow:inset 0 -1px 0 var(--lime)}
.footer__list--contact{gap:11px}
.contact-line{display:flex;gap:10px;font-size:13.5px;line-height:1.65;color:var(--mute)}
.contact-line__key{
  flex:0 0 42px;padding-top:2px;
  font-family:var(--mono);font-size:11px;letter-spacing:.12em;color:var(--fog);
}
.contact-line__val{flex:1 1 auto;min-width:0;word-break:break-word}
.footer__meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:12px 26px;
  padding-block:20px 30px;
  border-top:1px solid var(--line);
  font-size:13px;color:var(--fog);
}
.footer__copy{margin-right:auto;font-family:var(--mono);letter-spacing:.06em}
.footer__legal{display:flex;flex-wrap:wrap;gap:8px 20px}
.footer__legal .footer__link{font-size:13px}
.footer__icp{font-family:var(--mono);letter-spacing:.06em;color:var(--mute)}

/* ---------- 08 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border:1px solid var(--line);border-radius:2px;
  background:transparent;color:var(--text);
  font-family:var(--mono);font-size:13px;letter-spacing:.1em;
  transition:border-color .18s var(--ease),color .18s var(--ease),background-color .18s var(--ease),transform .18s var(--ease);
}
.btn:hover{transform:translateY(-1px);border-color:var(--lime);color:var(--lime);background:rgba(198,255,61,.07)}
.btn--primary{border-color:var(--lime);background:var(--lime);color:#08150F;font-weight:700}
.btn--primary:hover{background:#D8FF78;border-color:#D8FF78;color:#08150F}
.btn--ghost{border-color:var(--line);color:var(--mute)}
.btn--amber{border-color:rgba(255,165,59,.55);color:var(--amber)}
.btn--amber:hover{border-color:var(--amber);background:rgba(255,165,59,.1);color:var(--amber)}

/* ---------- 09 面包屑 ---------- */
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-family:var(--mono);font-size:11.5px;letter-spacing:.1em;text-transform:uppercase;color:var(--fog);
}
.breadcrumb__item{display:inline-flex;align-items:center;gap:8px}
.breadcrumb__item + .breadcrumb__item::before{content:"/";color:var(--line)}
.breadcrumb__link{color:var(--mute);transition:color .18s var(--ease)}
.breadcrumb__link:hover{color:var(--lime)}
.breadcrumb__current{color:var(--lime)}

/* ---------- 10 章节标题组 ---------- */
.section-head{display:flex;flex-direction:column;gap:8px;margin-bottom:clamp(18px,2.4vw,28px)}
.section-num{
  font-family:var(--mono);font-size:12px;letter-spacing:.24em;
  text-transform:uppercase;color:var(--lime);
}
.section-title{font-size:clamp(22px,2.6vw,34px)}
.section-desc{max-width:68ch;color:var(--mute)}

/* ---------- 11 面板与卡片 ---------- */
.panel{
  position:relative;background:var(--panel);
  border:1px solid var(--line);border-radius:2px;box-shadow:var(--shadow);
}
.panel__head{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:14px 18px;border-bottom:1px solid var(--line);
  font-family:var(--mono);font-size:11.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--fog);
}
.panel__body{padding:clamp(16px,2vw,22px)}
.card{
  display:flex;flex-direction:column;gap:10px;
  padding:clamp(16px,2vw,22px);
  background:var(--panel-2);border:1px solid var(--line);border-radius:2px;
  box-shadow:var(--shadow-soft);
  transition:border-color .18s var(--ease),transform .18s var(--ease);
}
.card:hover{border-color:var(--lime);transform:translateY(-2px)}

/* ---------- 12 标签 ---------- */
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:3px 9px;border:1px solid var(--line);
  font-family:var(--mono);font-size:11px;letter-spacing:.1em;color:var(--mute);
}
.tag--lime{border-color:rgba(198,255,61,.5);color:var(--lime)}
.tag--amber{border-color:rgba(255,165,59,.5);color:var(--amber)}

/* ---------- 13 正文容器 ---------- */
.prose{max-width:74ch;color:var(--mute);font-size:17px;line-height:1.8}
.prose > * + *{margin-top:1.15em}
.prose h2,.prose h3,.prose h4{color:var(--text);margin-top:1.8em}
.prose h2:first-child,.prose h3:first-child{margin-top:0}
.prose a{color:var(--lime);box-shadow:inset 0 -1px 0 rgba(198,255,61,.45);transition:box-shadow .18s var(--ease)}
.prose a:hover{box-shadow:inset 0 -2px 0 var(--lime)}
.prose ul{display:flex;flex-direction:column;gap:.55em}
.prose ul > li{position:relative;padding-left:20px}
.prose ul > li::before{content:"";position:absolute;left:0;top:.72em;width:8px;height:2px;background:var(--amber)}
.prose ol{display:flex;flex-direction:column;gap:.55em;counter-reset:item}
.prose ol > li{position:relative;padding-left:28px;counter-increment:item}
.prose ol > li::before{
  content:counter(item,decimal-leading-zero);
  position:absolute;left:0;top:.1em;
  font-family:var(--mono);font-size:12px;color:var(--lime);letter-spacing:.06em;
}
.prose blockquote{border-left:2px solid var(--lime);padding-left:18px;color:var(--text)}
.prose code{font-size:14px;color:var(--amber)}

/* ---------- 14 媒体框 ---------- */
.media-frame{
  position:relative;display:block;overflow:hidden;
  background:linear-gradient(135deg,var(--panel),#0F2A23);
  border:1px solid var(--line);border-radius:2px;
}
.media-frame > img,.media-frame__img{width:100%;height:100%;object-fit:cover;display:block}
.media-frame--16x9{aspect-ratio:16/9}
.media-frame--4x3{aspect-ratio:4/3}
.media-frame--3x2{aspect-ratio:3/2}
.media-frame--1x1{aspect-ratio:1/1}
.media-frame--wide{aspect-ratio:21/9}
.media-frame::before{
  content:"";position:absolute;inset:0;z-index:2;pointer-events:none;opacity:0;
  background-image:repeating-linear-gradient(114deg,rgba(198,255,61,.09) 0 2px,transparent 2px 12px);
  transition:opacity .22s var(--ease);
}
.media-frame:hover::before,.media-frame:focus-within::before{opacity:1}
.media-frame__caption{
  position:absolute;left:0;right:0;bottom:0;z-index:3;
  padding:12px 16px;
  font-family:var(--mono);font-size:11px;letter-spacing:.1em;color:var(--mute);
  background:linear-gradient(180deg,transparent,rgba(11,31,26,.94));
}

/* ---------- 15 横向卡带 ---------- */
.rail{
  display:flex;gap:clamp(12px,2vw,20px);
  overflow-x:auto;scroll-snap-type:x mandatory;
  padding-bottom:14px;
  scrollbar-color:var(--line) transparent;
}
.rail__item{flex:0 0 clamp(240px,32vw,340px);scroll-snap-align:start}
.rail::-webkit-scrollbar{height:6px}
.rail::-webkit-scrollbar-track{background:var(--line-soft)}
.rail::-webkit-scrollbar-thumb{background:var(--fog)}

/* ---------- 16 折叠问答 ---------- */
.fold{display:flex;flex-direction:column;gap:10px}
.fold__item{border:1px solid var(--line);background:var(--panel);border-radius:2px}
.fold__item[open]{border-color:rgba(198,255,61,.45)}
.fold__summary{
  display:flex;align-items:center;gap:12px;
  padding:15px 18px;cursor:pointer;list-style:none;
  font-weight:600;color:var(--text);
  transition:color .18s var(--ease);
}
.fold__summary::-webkit-details-marker{display:none}
.fold__summary::before{content:"＋";font-family:var(--mono);color:var(--lime);flex:0 0 auto}
.fold__item[open] .fold__summary::before{content:"－"}
.fold__summary:hover{color:var(--lime)}
.fold__body{padding:0 18px 18px;color:var(--mute);font-size:16px}

/* ---------- 17 锚点目录 ---------- */
.toc{border-left:2px solid var(--line);padding-left:16px}
.toc__list{display:flex;flex-direction:column;gap:8px}
.toc__link{
  display:block;padding:4px 0;
  font-family:var(--mono);font-size:12.5px;letter-spacing:.06em;color:var(--fog);
  transition:color .18s var(--ease),padding-left .18s var(--ease);
}
.toc__link:hover{color:var(--text)}
.toc__link[data-active="true"]{color:var(--lime);padding-left:6px;box-shadow:inset 2px 0 0 var(--lime)}

/* ---------- 18 动效与显现 ---------- */
html.js [data-reveal]{
  opacity:0;transform:translateY(12px);
  transition:opacity .45s var(--ease),transform .45s var(--ease);
}
html.js [data-reveal][data-revealed="true"]{opacity:1;transform:none}

.scroll-progress{
  position:fixed;top:0;left:0;z-index:120;
  width:100%;height:2px;transform:scaleX(0);transform-origin:0 50%;
  background:linear-gradient(90deg,var(--lime),var(--amber));
  pointer-events:none;
}
.to-top{
  position:fixed;right:20px;bottom:20px;z-index:90;
  display:grid;place-items:center;width:44px;height:44px;
  border:1px solid var(--line);border-radius:2px;
  background:rgba(20,52,43,.94);color:var(--lime);
  font-family:var(--mono);font-size:16px;line-height:1;
  opacity:0;visibility:hidden;transform:translateY(8px);
  transition:opacity .2s var(--ease),transform .2s var(--ease),visibility .2s linear,background-color .18s var(--ease),border-color .18s var(--ease),color .18s var(--ease);
}
.to-top[data-visible="true"]{opacity:1;visibility:visible;transform:none}
.to-top:hover{border-color:var(--lime);background:var(--lime);color:#08150F}

/* ---------- 19 响应式 ---------- */
@media (max-width:1024px){
  .footer__grid{grid-template-columns:1fr 1fr}
  .grid--4{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:960px){
  .nav-toggle{display:inline-flex}
  .site-nav{
    position:absolute;top:var(--header-h);left:0;right:0;
    display:block;margin:0;
    padding:8px var(--gutter) 22px;
    background:rgba(11,31,26,.98);
    border-bottom:1px solid var(--line);
    box-shadow:var(--shadow);
    max-height:calc(100dvh - var(--header-h));
    overflow-y:auto;
    opacity:0;visibility:hidden;transform:translateY(-8px);
    transition:opacity .2s var(--ease),transform .2s var(--ease),visibility .2s linear;
  }
  .site-nav[data-open="true"]{opacity:1;visibility:visible;transform:none}
  .site-nav__list{flex-direction:column;align-items:stretch;gap:0;border-top:1px solid var(--line-soft)}
  .site-nav__item{border-bottom:1px solid var(--line-soft)}
  .site-nav__link{display:block;padding:15px 2px;font-size:16px;color:var(--text)}
  .site-nav__link::after{display:none}
  .site-nav__link[aria-current="page"]{
    color:var(--lime);
    background:linear-gradient(90deg,rgba(198,255,61,.13),transparent 72%);
    padding-left:12px;
  }
  .quick-axis{margin-top:18px;padding:16px 0 0;border-left:0;border-top:1px solid var(--line-soft);flex-wrap:wrap}
  .grid--3,.grid--sidebar{grid-template-columns:minmax(0,1fr)}
  .grid--sidebar{gap:32px}
}
@media (max-width:720px){
  body{font-size:16px}
  .brand__sub{display:none}
  .header__rule{width:72%}
  .footer__grid{grid-template-columns:1fr;gap:30px}
  .footer__meta{flex-direction:column;align-items:flex-start;gap:10px}
  .footer__copy{margin-right:0}
  .grid--4{grid-template-columns:minmax(0,1fr)}
}
@media (max-width:600px){
  .grid--2,.grid--3{grid-template-columns:minmax(0,1fr)}
  .rail__item{flex-basis:min(84vw,320px)}
  .to-top{right:14px;bottom:14px}
}

/* ---------- 20 降低动态偏好 ---------- */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  html.js [data-reveal]{opacity:1;transform:none}
  .card:hover,.btn:hover{transform:none}
}