/* ==========================================================================
   BSPORTS 主站 · /assets/site.css
   共享外壳：变量 / 重置 / 中文排版 / 头部 / 页脚 / 通用组件
   ========================================================================== */

:root{
  --ink:#070C0B;
  --ink-2:#0E1716;
  --panel:#162220;
  --mint:#19F0B0;
  --mint-deep:#0E8F6B;
  --orange:#FF7A2F;
  --amber:#FFB020;
  --danger:#FF5C5C;
  --text:#D7E3E0;
  --muted:#8FA6A1;
  --line:rgba(215,227,224,.12);
  --line-strong:rgba(25,240,176,.34);
  --rail-w:0px;
  --wrap:1240px;
  --font-sans:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"JetBrains Mono","Roboto Mono",ui-monospace,"SFMono-Regular",Menlo,Consolas,monospace;
}

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

html{
  scroll-behavior:smooth;
  scroll-padding-top:104px;
  -webkit-text-size-adjust:100%;
}

body{
  margin:0;
  padding-left:var(--rail-w);
  background-color:var(--ink);
  background-image:
    radial-gradient(900px 520px at 92% -6%, rgba(25,240,176,.10), transparent 68%),
    radial-gradient(760px 460px at -4% 104%, rgba(255,122,47,.07), transparent 70%);
  background-repeat:no-repeat;
  color:var(--text);
  font-family:var(--font-sans);
  font-size:17px;
  line-height:1.8;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}

img,svg{max-width:100%;height:auto}
a{color:var(--mint)}
button{font-family:inherit}

h1,h2,h3,h4{margin:0;font-weight:800;line-height:1.2;letter-spacing:-.01em}
p{margin:0 0 1.1em}
ul,ol{margin:0}

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

:focus-visible{
  outline:3px solid var(--amber);
  outline-offset:3px;
  border-radius:6px;
}

/* ---------- 跳至主内容 ---------- */
.skip-link{
  position:absolute;
  left:14px;
  top:-70px;
  z-index:120;
  padding:11px 20px;
  background:var(--mint);
  color:var(--ink);
  font-weight:800;
  font-size:14px;
  text-decoration:none;
  border-radius:0 0 14px 14px;
  transition:top .18s ease;
}
.skip-link:focus{top:0}

/* ---------- 头部 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:linear-gradient(180deg,#070C0B 0%,#0A1312 100%);
  border-bottom:1px solid var(--line-strong);
  box-shadow:0 20px 46px -34px rgba(0,0,0,.95);
}

.header-inner{
  position:relative;
  width:min(100% - 32px, var(--wrap));
  margin-inline:auto;
  display:flex;
  align-items:center;
  gap:clamp(12px,2vw,26px);
  padding-block:13px;
}

.brand{
  display:inline-flex;
  align-items:center;
  gap:12px;
  flex:0 0 auto;
  color:var(--text);
  text-decoration:none;
}
.brand__mark{
  display:grid;
  place-items:center;
  width:38px;
  height:38px;
  border:2px solid var(--mint);
  border-radius:12px 4px 12px 4px;
  color:var(--mint);
  font-family:var(--font-mono);
  font-weight:800;
  font-size:18px;
  line-height:1;
  box-shadow:4px 4px 0 rgba(25,240,176,.16);
  transition:background .18s ease,color .18s ease,transform .18s ease,box-shadow .18s ease;
}
.brand:hover .brand__mark,
.brand:focus-visible .brand__mark{
  background:var(--mint);
  color:var(--ink);
  transform:translate(-2px,-2px);
  box-shadow:7px 7px 0 rgba(25,240,176,.24);
}
.brand__text{display:flex;flex-direction:column;gap:2px;line-height:1.15}
.brand__name{font-weight:800;font-size:19px;letter-spacing:.14em}
.brand__sub{font-size:11.5px;letter-spacing:.16em;color:var(--muted)}

.capsule-nav{
  flex:1 1 auto;
  min-width:0;
  padding:5px;
  background:var(--ink-2);
  border:2px solid var(--line);
  border-radius:999px;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.04);
}
.nav-list{
  display:flex;
  align-items:center;
  gap:2px;
  list-style:none;
  padding:0;
  overflow-x:auto;
  overscroll-behavior-x:contain;
  scrollbar-width:none;
  scroll-snap-type:x proximity;
}
.nav-list::-webkit-scrollbar{display:none}
.nav-list > li{flex:0 0 auto;scroll-snap-align:center}
.nav-link{
  display:inline-block;
  padding:9px 15px;
  border-radius:999px;
  color:var(--muted);
  font-size:15px;
  font-weight:600;
  white-space:nowrap;
  text-decoration:none;
  transition:background .18s ease,color .18s ease,box-shadow .18s ease;
}
.nav-link:hover{color:var(--mint);background:rgba(25,240,176,.10)}
.nav-link[aria-current="page"]{
  background:var(--mint);
  color:var(--ink);
  box-shadow:0 10px 22px -12px rgba(25,240,176,.95);
}
.nav-link:focus-visible{outline-offset:2px}

.header-cta{
  flex:0 0 auto;
  font-size:14px;
  padding:11px 17px;
}

.nav-toggle{
  display:none;
  width:46px;
  height:46px;
  flex:0 0 auto;
  place-items:center;
  background:rgba(22,34,32,.92);
  border:2px solid var(--line);
  border-radius:14px;
  cursor:pointer;
  transition:border-color .18s ease,background .18s ease;
}
.nav-toggle:hover{border-color:var(--mint);background:rgba(25,240,176,.10)}
.nav-toggle__bars{
  position:relative;
  display:block;
  width:20px;
  height:2px;
  border-radius:2px;
  background:var(--text);
  transition:background .2s ease;
}
.nav-toggle__bars::before,
.nav-toggle__bars::after{
  content:"";
  position:absolute;
  left:0;
  width:20px;
  height:2px;
  border-radius:2px;
  background:var(--text);
  transition:transform .2s ease,background .2s ease;
}
.nav-toggle__bars::before{top:-6px}
.nav-toggle__bars::after{top:6px}
.site-header[data-open] .nav-toggle__bars{background:transparent}
.site-header[data-open] .nav-toggle__bars::before{transform:translateY(6px) rotate(45deg);background:var(--mint)}
.site-header[data-open] .nav-toggle__bars::after{transform:translateY(-6px) rotate(-45deg);background:var(--mint)}

/* ---------- 品牌轨道（侧边导览） ---------- */
.brand-rail{
  display:none;
  position:fixed;
  left:0;
  top:0;
  bottom:0;
  width:var(--rail-w);
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:22px;
  z-index:70;
  pointer-events:none;
  background:linear-gradient(180deg,var(--ink) 0%,var(--ink-2) 55%,var(--ink) 100%);
  border-right:2px solid rgba(25,240,176,.16);
}
.brand-rail__mark{
  writing-mode:vertical-rl;
  font-family:var(--font-mono);
  font-weight:800;
  font-size:15px;
  letter-spacing:.44em;
  color:var(--mint);
}
.brand-rail__line{
  width:2px;
  height:74px;
  background:linear-gradient(180deg,var(--mint),rgba(25,240,176,0));
}
.brand-rail__text{
  writing-mode:vertical-rl;
  font-size:12px;
  letter-spacing:.24em;
  color:var(--muted);
}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(64px,8vw,120px);
  overflow:hidden;
  background:linear-gradient(180deg,var(--ink-2) 0%,var(--ink) 100%);
  border-top:2px solid rgba(25,240,176,.22);
}
.footer-glow{
  position:absolute;
  inset:0 0 -40% 0;
  pointer-events:none;
  background-image:
    radial-gradient(60% 70% at 18% 108%, rgba(25,240,176,.18), transparent 72%),
    radial-gradient(50% 66% at 86% 112%, rgba(255,122,47,.12), transparent 74%);
}
.footer-inner{
  position:relative;
  width:min(100% - 32px, var(--wrap));
  margin-inline:auto;
  padding:clamp(44px,6vw,74px) 0 30px;
  display:grid;
  grid-template-columns:minmax(230px,1.1fr) minmax(0,1.7fr) minmax(250px,1fr);
  gap:clamp(26px,4vw,54px);
}
.footer-brand{display:flex;flex-direction:column}
.brand--footer{margin-bottom:16px}
.footer-note{
  margin:0 0 8px;
  color:var(--text);
  font-size:14.5px;
  line-height:1.7;
}
.footer-note--small{color:var(--muted);font-size:13px;margin-top:2px}
.footer-meta{
  margin:0;
  color:var(--muted);
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.08em;
}
.footer-nav{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:24px;
}
.footer-col__title{
  margin:0 0 14px;
  font-size:12.5px;
  font-weight:700;
  letter-spacing:.18em;
  color:var(--mint);
}
.footer-links{
  list-style:none;
  padding:0;
  display:grid;
  gap:11px;
}
.footer-link{
  position:relative;
  display:inline-block;
  color:var(--muted);
  font-size:15px;
  text-decoration:none;
  transition:color .18s ease;
}
.footer-link::after{
  content:"";
  position:absolute;
  left:0;
  bottom:-3px;
  height:2px;
  width:0;
  background:var(--mint);
  transition:width .2s ease;
}
.footer-link:hover{color:var(--mint)}
.footer-link:hover::after{width:100%}

.footer-contact{
  display:grid;
  gap:14px;
  align-content:start;
}
.footer-contact__item{
  display:grid;
  gap:5px;
  justify-items:start;
  padding:13px 15px;
  background:var(--panel);
  border:2px solid var(--line);
  border-radius:14px;
}
.footer-contact__label{
  font-size:11.5px;
  letter-spacing:.18em;
  color:var(--muted);
}
.footer-contact__value{
  font-family:var(--font-mono);
  font-size:14px;
  color:var(--text);
  word-break:break-all;
}
.contact-copy{
  margin-top:4px;
  padding:6px 13px;
  background:transparent;
  border:1.5px solid var(--line-strong);
  border-radius:999px;
  color:var(--mint);
  font-size:12.5px;
  letter-spacing:.06em;
  cursor:pointer;
  transition:background .18s ease,color .18s ease,border-color .18s ease;
}
.contact-copy:hover{background:rgba(25,240,176,.12)}
.contact-copy[data-copied="true"]{
  background:var(--mint);
  border-color:var(--mint);
  color:var(--ink);
  font-weight:700;
}

.footer-strip{
  position:relative;
  width:min(100% - 32px, var(--wrap));
  margin-inline:auto;
  padding:18px 0 26px;
  border-top:1px solid var(--line);
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:10px 24px;
  color:var(--muted);
  font-size:13px;
}
.footer-icp{
  font-family:var(--font-mono);
  letter-spacing:.06em;
  color:var(--amber);
}
.footer-address{font-size:13px}
.footer-copy{font-size:12.5px}

/* ---------- 通用按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:12px 21px;
  border:2px solid transparent;
  border-radius:999px;
  font-size:15px;
  font-weight:800;
  line-height:1;
  text-decoration:none;
  cursor:pointer;
  transition:transform .18s ease,box-shadow .18s ease,background .18s ease,color .18s ease,border-color .18s ease;
}
.btn:hover{transform:translate(-2px,-2px)}
.btn:active{transform:translate(1px,1px)}
.btn--action{
  background:linear-gradient(135deg,var(--orange),var(--amber));
  color:#1A0C02;
  box-shadow:5px 5px 0 rgba(255,122,47,.22);
}
.btn--action:hover{box-shadow:9px 9px 0 rgba(255,122,47,.3)}
.btn--mint{
  background:var(--mint);
  color:var(--ink);
  box-shadow:5px 5px 0 rgba(25,240,176,.2);
}
.btn--mint:hover{box-shadow:9px 9px 0 rgba(25,240,176,.28)}
.btn--ghost{
  background:transparent;
  border-color:var(--line-strong);
  color:var(--mint);
}
.btn--ghost:hover{border-color:var(--mint);background:rgba(25,240,176,.1);box-shadow:5px 5px 0 rgba(25,240,176,.14)}

/* ---------- 容器与排版 ---------- */
.wrap{
  width:min(100% - 32px, var(--wrap));
  margin-inline:auto;
}
.section{padding-block:clamp(48px,7vw,96px)}
.section--tight{padding-block:clamp(26px,4vw,50px)}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.2em;
  color:var(--mint);
}
.eyebrow::before{
  content:"";
  width:26px;
  height:2px;
  background:var(--mint);
}
.section-title{
  margin-top:14px;
  font-size:clamp(28px,4vw,52px);
  font-weight:800;
}
.lede{
  max-width:62ch;
  margin-top:16px;
  color:var(--muted);
  font-size:clamp(16px,1.6vw,19px);
  line-height:1.85;
}
.vertical-note{
  writing-mode:vertical-rl;
  font-size:12px;
  letter-spacing:.3em;
  color:var(--muted);
}
.divider{
  height:2px;
  margin:clamp(24px,4vw,42px) 0;
  border:0;
  background:linear-gradient(90deg,rgba(25,240,176,.55),rgba(25,240,176,0));
}

/* ---------- 面包屑 ---------- */
.breadcrumbs{
  padding-block:18px;
  color:var(--muted);
  font-size:13px;
}
.breadcrumbs ol{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  list-style:none;
  padding:0;
}
.breadcrumbs li + li::before{
  content:"/";
  margin-right:8px;
  color:rgba(215,227,224,.3);
}
.breadcrumbs a{color:var(--muted);text-decoration:none;transition:color .18s ease}
.breadcrumbs a:hover{color:var(--mint)}

/* ---------- 网格与面板 ---------- */
.grid{
  display:grid;
  gap:clamp(16px,2.4vw,28px);
}
.grid--2{grid-template-columns:repeat(auto-fit,minmax(min(100%,320px),1fr))}
.grid--3{grid-template-columns:repeat(auto-fit,minmax(min(100%,260px),1fr))}

.panel{
  padding:clamp(18px,2.4vw,28px);
  background:var(--panel);
  border:2px solid var(--line);
  border-radius:18px;
}
.panel--mint{
  border-color:rgba(25,240,176,.42);
  box-shadow:8px 8px 0 rgba(25,240,176,.10);
}

.stat{display:grid;gap:6px}
.stat__num{
  font-family:var(--font-mono);
  font-weight:800;
  font-size:clamp(30px,4.6vw,54px);
  line-height:1;
  color:var(--mint);
}
.stat__label{font-size:13px;letter-spacing:.14em;color:var(--muted)}

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:5px 12px;
  border:1.5px solid rgba(25,240,176,.42);
  border-radius:999px;
  color:var(--mint);
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.08em;
}
.tag--orange{border-color:rgba(255,122,47,.5);color:var(--orange)}
.tag--amber{border-color:rgba(255,176,32,.5);color:var(--amber)}
.tag--danger{border-color:rgba(255,92,92,.5);color:var(--danger)}

/* ---------- 折叠面板 ---------- */
.panel-details{
  background:var(--panel);
  border:2px solid var(--line);
  border-radius:14px;
  overflow:hidden;
}
.panel-details + .panel-details{margin-top:12px}
.panel-details > summary{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  padding:16px 20px;
  font-weight:700;
  cursor:pointer;
  list-style:none;
  transition:color .18s ease,background .18s ease;
}
.panel-details > summary::-webkit-details-marker{display:none}
.panel-details > summary::after{
  content:"+";
  font-family:var(--font-mono);
  color:var(--mint);
  font-size:18px;
  line-height:1;
}
.panel-details[open] > summary{color:var(--mint);background:rgba(25,240,176,.06)}
.panel-details[open] > summary::after{content:"–"}
.panel-details__body{
  padding:14px 20px 20px;
  border-top:1px solid var(--line);
  color:var(--muted);
  font-size:15.5px;
}

/* ---------- 图片容器基础规则 ---------- */
.media-frame{
  position:relative;
  overflow:hidden;
  aspect-ratio:16 / 10;
  border:2px solid var(--line);
  border-radius:20px;
  background:linear-gradient(140deg,var(--ink-2) 0%,#0B1513 58%,#101D1A 100%);
  box-shadow:10px 10px 0 rgba(25,240,176,.08);
}
.media-frame--tall{aspect-ratio:4 / 5}
.media-frame--wide{aspect-ratio:21 / 9}
.media-frame img{
  display:block;
  width:100%;
  height:100%;
  object-fit:cover;
}
.media-frame__label{
  position:absolute;
  left:16px;
  bottom:14px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.16em;
  color:var(--mint);
}

/* ---------- JS 注入组件 ---------- */
.scroll-progress{
  position:fixed;
  left:var(--rail-w);
  top:0;
  z-index:100;
  width:0;
  height:3px;
  background:linear-gradient(90deg,var(--mint),var(--orange));
  transition:width .12s linear;
}
.to-top{
  position:fixed;
  right:18px;
  bottom:18px;
  z-index:90;
  width:48px;
  height:48px;
  display:grid;
  place-items:center;
  background:var(--ink-2);
  border:2px solid var(--line-strong);
  border-radius:14px;
  color:var(--mint);
  font-family:var(--font-mono);
  font-size:16px;
  cursor:pointer;
  opacity:0;
  visibility:hidden;
  transform:translateY(10px);
  transition:opacity .2s ease,transform .2s ease,visibility .2s ease,border-color .18s ease;
}
.to-top.is-visible{opacity:1;visibility:visible;transform:none}
.to-top:hover{border-color:var(--mint);background:rgba(25,240,176,.12)}

[data-reveal]{
  opacity:0;
  transform:translateY(18px);
  transition:opacity .5s ease,transform .5s ease;
}
[data-reveal].is-visible{opacity:1;transform:none}

/* ---------- 响应式：平板 ---------- */
@media (min-width:1280px){
  :root{--rail-w:76px}
  .brand-rail{display:flex}
}

@media (max-width:1100px){
  .nav-link{padding:8px 12px;font-size:14.5px}
  .header-cta{font-size:13px;padding:10px 14px}
}

@media (max-width:980px){
  .footer-inner{grid-template-columns:1fr 1fr}
  .footer-brand{grid-column:1 / -1}
  .footer-contact{
    grid-column:1 / -1;
    grid-template-columns:repeat(auto-fit,minmax(230px,1fr));
  }
}

/* ---------- 响应式：移动导航 ---------- */
@media (max-width:900px){
  .nav-toggle{display:grid}
  .capsule-nav{
    position:absolute;
    left:0;
    right:0;
    top:calc(100% + 8px);
    padding:10px;
    border-radius:22px;
    max-height:min(70vh,520px);
    overflow:auto;
    opacity:0;
    visibility:hidden;
    transform:translateY(-10px);
    box-shadow:0 30px 60px -32px rgba(0,0,0,.95);
    transition:opacity .2s ease,transform .2s ease,visibility .2s ease;
  }
  .site-header[data-open] .capsule-nav{
    opacity:1;
    visibility:visible;
    transform:none;
  }
  .nav-list{
    flex-direction:column;
    align-items:stretch;
    gap:4px;
    overflow:visible;
  }
  .nav-list > li{flex:1 1 auto}
  .nav-link{
    display:block;
    padding:13px 16px;
    border-radius:14px;
    font-size:16px;
  }
  .nav-link[aria-current="page"]{box-shadow:none}
}

@media (max-width:620px){
  body{font-size:16px}
  .footer-nav{grid-template-columns:1fr 1fr;gap:20px}
  .footer-strip{flex-direction:column;align-items:flex-start}
  .footer-address{order:3}
}

@media (max-width:600px){
  .header-cta{display:none}
  .brand__sub{display:none}
  .brand__mark{width:34px;height:34px;font-size:16px}
}

/* ---------- 无障碍：降低动态 ---------- */
@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;
  }
  [data-reveal]{opacity:1;transform:none}
  .scroll-progress{transition:none}
}