/* 新博体育 · 共享样式 /assets/site.css */

:root{
  --ink:#06120F;
  --panel:#0C211C;
  --raise:#123029;
  --line:#1E4A3E;
  --cyan:#46F0D0;
  --cyan-deep:#1FA48C;
  --cinnabar:#C7432F;
  --cinnabar-soft:#E4715C;
  --yellow:#FFD25A;
  --snow:#EAF6F2;
  --mist:#9FBDB4;
  --rail:268px;
  --rail-pad:20px;
  --bar-h:62px;
  --dock-h:68px;
  --r-xl:28px;
  --r-lg:20px;
  --r-md:14px;
  --pill:999px;
  --font-body:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Noto Sans SC",sans-serif;
  --font-mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,"Courier New",monospace;
  --ease:cubic-bezier(.22,.68,.32,1);
}

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

html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}

body{
  margin:0;
  padding-left:var(--rail);
  min-height:100vh;
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.85;
  color:var(--snow);
  background-color:var(--ink);
  background-image:
    linear-gradient(rgba(30,74,62,.22) 1px,transparent 1px),
    linear-gradient(90deg,rgba(30,74,62,.22) 1px,transparent 1px);
  background-size:120px 120px;
  background-attachment:fixed;
  overflow-x:hidden;
}

img{display:block;max-width:100%;height:auto}

h1,h2,h3,h4{font-weight:800;letter-spacing:.06em;line-height:1.24;margin:0 0 .6em;color:var(--snow)}
h1{font-size:clamp(34px,5vw,54px)}
h2{font-size:clamp(24px,3.2vw,32px)}
h3{font-size:clamp(19px,2.1vw,22px)}
h4{font-size:17px}
p{margin:0 0 1.1em}
ul,ol{margin:0 0 1.1em}
a{color:var(--cyan);text-decoration:none}
a:hover{text-decoration:underline;text-underline-offset:4px}
button{font-family:inherit}

:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:8px}

.num{font-family:var(--font-mono);font-variant-numeric:tabular-nums;font-weight:700;letter-spacing:0}
.label{font-family:var(--font-mono);font-size:12px;letter-spacing:.12em;color:var(--mist);text-transform:uppercase}
.copy-field{position:absolute;left:-9999px;top:0;width:1px;height:1px;opacity:0;pointer-events:none}

/* ---------- 通用按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:var(--pill);border:1px solid transparent;
  font-size:15px;font-weight:700;letter-spacing:.06em;line-height:1.2;
  text-decoration:none;cursor:pointer;
  transition:background .25s var(--ease),color .25s var(--ease),border-color .25s var(--ease),box-shadow .25s var(--ease),transform .25s var(--ease);
}
.btn:hover{text-decoration:none}
.btn-primary{background:var(--cyan);color:#04140F}
.btn-primary:hover{background:#6ff7dd;box-shadow:0 0 0 4px rgba(70,240,208,.16);transform:translateY(-1px)}
.btn-ghost{background:transparent;color:var(--snow);border-color:var(--line)}
.btn-ghost:hover{background:var(--raise);border-color:var(--cyan-deep);color:var(--cyan)}
.btn-small{padding:8px 15px;font-size:13px}

/* ---------- 框架式导航（桌面左导轨） ---------- */
.frame-header{
  position:fixed;top:0;left:0;bottom:0;width:var(--rail);z-index:80;
  display:flex;flex-direction:column;gap:22px;
  padding:26px var(--rail-pad) 22px;
  background:linear-gradient(180deg,var(--panel) 0%,#071713 64%,var(--ink) 100%);
  border-right:1px solid var(--line);
  overflow-y:auto;overscroll-behavior:contain;
}

.skip-link{
  position:fixed;top:14px;left:14px;z-index:200;
  padding:10px 18px;border-radius:var(--pill);
  background:var(--cyan);color:#04140F;font-size:14px;font-weight:700;letter-spacing:.06em;
  transform:translateY(-200%);
  transition:transform .25s var(--ease);
}
.skip-link:focus{transform:translateY(0)}

.brand{display:flex;align-items:center;gap:12px}
.brand-mark{
  position:relative;flex:none;width:42px;height:42px;border-radius:var(--r-md);
  background:var(--raise);border:1px solid var(--line);
}
.brand-mark::before{
  content:"";position:absolute;left:9px;right:9px;bottom:10px;height:3px;border-radius:2px;
  background:var(--cyan);
  box-shadow:0 -7px 0 rgba(70,240,208,.5),0 -14px 0 rgba(70,240,208,.22);
}
.brand-mark::after{
  content:"";position:absolute;right:6px;top:6px;width:6px;height:6px;border-radius:50%;
  background:var(--cinnabar);
}
.brand-text{display:flex;flex-direction:column;gap:2px;min-width:0}
.brand-name{font-size:19px;font-weight:800;letter-spacing:.08em;line-height:1.2;color:var(--snow)}
.brand-name:hover{color:var(--cyan);text-decoration:none}
.brand-line{font-size:11px;letter-spacing:.12em;line-height:1.5;color:var(--mist)}

.nav-toggle{
  display:none;align-items:center;gap:8px;
  padding:8px 14px;border-radius:var(--pill);
  background:var(--raise);border:1px solid var(--line);color:var(--snow);
  font-size:13px;letter-spacing:.08em;cursor:pointer;
  transition:border-color .25s var(--ease),color .25s var(--ease);
}
.nav-toggle:hover{border-color:var(--cyan-deep);color:var(--cyan)}
.nav-toggle-text{font-weight:700}
.bars{position:relative;display:block;width:16px;height:10px}
.bars::before,.bars::after{
  content:"";position:absolute;left:0;right:0;height:2px;border-radius:2px;background:var(--cyan);
  transition:transform .25s var(--ease);
}
.bars::before{top:0}
.bars::after{bottom:0}
.frame-header[data-open] .bars::before{transform:translateY(4px) rotate(45deg)}
.frame-header[data-open] .bars::after{transform:translateY(-4px) rotate(-45deg)}

.rail-nav{display:flex;flex-direction:column;flex:1 1 auto;min-height:0;gap:16px}
.rail-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:4px}
.rail-link{
  position:relative;display:flex;align-items:center;gap:12px;
  padding:11px 12px;border-radius:var(--r-md);
  font-size:15px;letter-spacing:.06em;color:var(--mist);
  transition:background .25s var(--ease),color .25s var(--ease);
}
.rail-link:hover{background:var(--raise);color:var(--snow);text-decoration:none}
.rail-num{font-family:var(--font-mono);font-size:11px;letter-spacing:.06em;color:#2E6B5C;transition:color .25s var(--ease)}
.rail-label{flex:1 1 auto;min-width:0}
.rail-link[aria-current="page"]{background:var(--raise);color:var(--cyan)}
.rail-link[aria-current="page"] .rail-num{color:var(--yellow)}
.rail-link[aria-current="page"]::before{
  content:"";position:absolute;left:calc(-1 * var(--rail-pad));top:50%;margin-top:-12px;
  width:3px;height:24px;border-radius:var(--pill);background:var(--cyan);
  box-shadow:0 0 12px rgba(70,240,208,.6);
}

.rail-actions{display:grid;gap:10px;margin-top:auto;padding-top:16px}
.rail-actions .btn{width:100%}

.rail-meta{
  display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin:0;
  padding-top:14px;border-top:1px dashed var(--line);
  font-size:11px;letter-spacing:.12em;color:var(--mist);
}
.badge{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;
  padding:3px 10px;border-radius:var(--pill);
  color:var(--yellow);background:rgba(255,210,90,.08);border:1px solid rgba(255,210,90,.45);
}
.rail-coord{font-family:var(--font-mono);color:var(--cinnabar-soft)}

.mobile-dock{display:none}

.frame-progress{
  position:fixed;top:0;left:var(--rail);right:0;height:3px;z-index:95;
  background:rgba(30,74,62,.55);pointer-events:none;
}
.frame-progress-bar{
  display:block;height:100%;width:100%;
  transform:scaleX(var(--p,0));transform-origin:0 50%;
  background:linear-gradient(90deg,var(--cyan),var(--yellow) 68%,var(--cinnabar));
  transition:transform .12s linear;
}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;margin-top:clamp(48px,7vw,96px);
  background:linear-gradient(180deg,rgba(12,33,28,.55) 0%,var(--panel) 40%);
  border-top:1px solid var(--line);
}
.footer-band{
  height:10px;
  background:linear-gradient(90deg,
    var(--cinnabar) 0 18%,
    var(--cyan) 18% 52%,
    var(--yellow) 52% 66%,
    rgba(30,74,62,.35) 66% 100%);
}
.footer-inner{
  display:grid;
  grid-template-columns:minmax(240px,1.1fr) 1.5fr minmax(230px,1fr);
  gap:clamp(24px,3.4vw,48px);
  max-width:1180px;margin:0 auto;
  padding:clamp(36px,5vw,60px) clamp(20px,4vw,44px);
}
.footer-brand{display:flex;flex-direction:column;gap:14px}
.footer-note{margin:0;max-width:30em;font-size:14px;line-height:1.8;color:var(--mist)}
.footer-coord{margin:0;display:flex;flex-wrap:wrap;align-items:baseline;gap:10px;font-size:13px;color:var(--snow)}

.footer-cols{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.footer-col-title{
  margin:0 0 16px;font-size:13px;font-weight:800;letter-spacing:.18em;color:var(--snow);
}
.footer-col-title::after{
  content:"";display:block;width:26px;height:2px;margin-top:9px;border-radius:2px;background:var(--cyan);
}
.footer-links{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:10px;font-size:14px}
.footer-links a{display:inline-block;color:var(--mist);transition:color .2s var(--ease),transform .2s var(--ease)}
.footer-links a:hover{color:var(--cyan);text-decoration:none;transform:translateX(4px)}

.footer-contact{display:flex;flex-direction:column;gap:12px}
.copy-btn{
  display:inline-flex;align-items:center;gap:10px;align-self:flex-start;
  max-width:100%;padding:9px 14px;border-radius:var(--pill);
  background:var(--raise);border:1px solid var(--line);color:var(--snow);
  font-size:12.5px;cursor:pointer;
  transition:border-color .25s var(--ease),background .25s var(--ease);
}
.copy-btn:hover{border-color:var(--cyan-deep)}
.copy-btn[data-copied="true"]{border-color:var(--cyan);background:rgba(70,240,208,.12)}
.copy-text{font-family:var(--font-mono);letter-spacing:.02em;overflow-wrap:anywhere}
.copy-hint{font-size:11px;letter-spacing:.12em;color:var(--cyan);white-space:nowrap}
.footer-line{margin:0;display:flex;flex-wrap:wrap;align-items:baseline;gap:10px;font-size:14px;color:var(--mist)}
.footer-mist{margin:0;font-size:13px;line-height:1.7;color:var(--mist);opacity:.86}

.footer-legal{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px 24px;
  max-width:1180px;margin:0 auto;
  padding:20px clamp(20px,4vw,44px) 30px;
  border-top:1px solid var(--line);
  font-size:13px;color:var(--mist);
}
.legal-line{margin:0;font-family:var(--font-mono);letter-spacing:.06em}
.legal-links{list-style:none;display:flex;flex-wrap:wrap;gap:18px;margin:0;padding:0}
.legal-links a{color:var(--mist)}
.legal-links a:hover{color:var(--cyan);text-decoration:none}

/* ---------- 通用内容容器 ---------- */
.wrap{width:100%;max-width:1180px;margin:0 auto;padding:0 clamp(20px,4vw,44px)}
.section{position:relative;padding:clamp(56px,7vw,104px) 0}
.section-head{max-width:760px;margin-bottom:clamp(24px,3vw,40px)}
.section-num{
  display:block;margin-bottom:10px;
  font-family:var(--font-mono);font-size:13px;letter-spacing:.24em;color:var(--cyan);
}
.section-title{margin-bottom:.4em}
.lede{max-width:34em;font-size:17px;color:var(--mist)}
.stack{display:grid;gap:16px}
.divider{height:1px;border:0;margin:0;background:var(--line)}

.prose{max-width:680px}
.prose p{max-width:36em}
.prose h2,.prose h3{margin-top:1.6em}
.prose ul,.prose ol{padding-left:1.3em;color:var(--mist)}
.prose li{margin:.4em 0}
.prose strong{color:var(--snow)}
.prose blockquote{
  margin:1.6em 0;padding:14px 20px;color:var(--mist);
  border-left:3px solid var(--cyan);border-radius:0 var(--r-md) var(--r-md) 0;
  background:rgba(70,240,208,.06);
}

.band{height:10px;border-radius:var(--pill);background:linear-gradient(90deg,var(--cyan),rgba(70,240,208,0))}
.band-cyan{background:linear-gradient(90deg,var(--cyan),rgba(70,240,208,0))}
.band-red{background:linear-gradient(90deg,var(--cinnabar),rgba(199,67,47,0))}
.band-yellow{background:linear-gradient(90deg,var(--yellow),rgba(255,210,90,0))}

.crumbs{
  display:flex;flex-wrap:wrap;list-style:none;margin:0 0 20px;padding:0;
  font-size:12px;letter-spacing:.12em;color:var(--mist);
}
.crumbs li+li::before{content:"/";margin:0 9px;color:var(--line)}
.crumbs a{color:var(--mist)}
.crumbs a:hover{color:var(--cyan)}

.crumb{display:inline-flex;align-items:center;gap:8px;font-size:12px;letter-spacing:.12em;color:var(--mist)}

.grid{display:grid;gap:clamp(18px,2.4vw,28px)}
.grid-3{grid-template-columns:repeat(3,1fr)}

.card{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--r-xl);
  padding:clamp(20px,2.6vw,28px);
  transition:background .3s var(--ease),border-color .3s var(--ease),transform .3s var(--ease);
}
.card:hover{background:var(--raise);border-color:var(--cyan-deep);transform:translateY(-4px)}

/* ---------- 专题研究板 ---------- */
.board{
  position:relative;overflow:hidden;
  background:var(--panel);border:1px solid var(--line);border-radius:var(--r-xl);
  padding:clamp(20px,3vw,30px);
}
.board::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:4px;
  background:linear-gradient(180deg,var(--cyan),rgba(70,240,208,0));
}
.board-head{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px;margin-bottom:14px}
.board-title{margin:0;font-size:20px;font-weight:800;letter-spacing:.06em}
.board-list{list-style:none;margin:0;padding:0;display:grid;gap:10px}
.board-list li{position:relative;padding-left:18px;font-size:15px;line-height:1.75;color:var(--mist)}
.board-list li::before{
  content:"";position:absolute;left:0;top:.7em;width:7px;height:7px;border-radius:2px;background:var(--cyan-deep);
}
.board-note{
  margin:16px 0 0;padding-top:12px;border-top:1px dashed var(--line);
  font-size:13px;line-height:1.7;color:var(--mist);
}
.board-links{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px}
.board-links a{
  padding:7px 14px;border-radius:var(--pill);
  border:1px solid var(--line);background:var(--raise);color:var(--snow);
  font-size:13px;letter-spacing:.06em;
  transition:border-color .25s var(--ease),color .25s var(--ease);
}
.board-links a:hover{border-color:var(--cyan-deep);color:var(--cyan);text-decoration:none}

.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 10px;border-radius:var(--pill);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;text-transform:uppercase;
  color:var(--cyan);background:rgba(70,240,208,.07);border:1px solid rgba(70,240,208,.42);
}
.tag-warm{color:var(--yellow);background:rgba(255,210,90,.08);border-color:rgba(255,210,90,.45)}
.tag-red{color:var(--cinnabar-soft);background:rgba(199,67,47,.14);border-color:rgba(199,67,47,.5)}

/* ---------- 图片容器（页面阶段放置图片） ---------- */
.media-grid{display:grid;gap:clamp(14px,2vw,22px);grid-template-columns:repeat(2,1fr)}
.media-frame{
  position:relative;overflow:hidden;margin:0;
  border:1px solid var(--line);border-radius:var(--r-xl);
  background:linear-gradient(150deg,var(--raise) 0%,#06120F 72%);
}
.media-frame img{width:100%;height:100%;object-fit:cover}
.media-frame::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(180deg,rgba(6,18,15,0) 42%,rgba(6,18,15,.78) 100%);
}
.media-frame figcaption{
  position:absolute;left:18px;right:18px;bottom:14px;z-index:2;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.12em;color:var(--mist);
}
.media-frame[data-ratio="16x9"]{aspect-ratio:16/9}
.media-frame[data-ratio="3x2"]{aspect-ratio:3/2}
.media-frame[data-ratio="4x5"]{aspect-ratio:4/5}
.media-frame[data-ratio="1x1"]{aspect-ratio:1/1}

/* ---------- 滚动显现 ---------- */
html.js [data-reveal]{
  opacity:0;transform:translateY(24px);
  transition:opacity .6s var(--ease),transform .6s var(--ease);
}
html.js [data-reveal].is-in{opacity:1;transform:none}

/* ---------- 响应式 ---------- */
@media (max-width:1180px){
  :root{--rail:236px;--rail-pad:18px}
  .frame-header{padding:22px var(--rail-pad) 20px}
  .footer-inner{grid-template-columns:1fr 1fr}
  .footer-contact{grid-column:1 / -1}
}

@media (max-width:980px){
  :root{--rail-pad:16px}
  body{padding-left:0;padding-top:var(--bar-h);padding-bottom:var(--dock-h);background-size:88px 88px}

  .frame-header{
    position:fixed;top:0;left:0;right:0;bottom:auto;
    width:auto;height:var(--bar-h);
    flex-direction:row;align-items:center;justify-content:space-between;gap:12px;
    padding:0 var(--rail-pad);
    background:#091A16;
    border-right:0;border-bottom:1px solid var(--line);
    overflow:visible;
  }
  .nav-toggle{display:inline-flex}
  .brand-mark{width:36px;height:36px;border-radius:12px}
  .brand-name{font-size:17px}
  .brand-line{display:none}

  .rail-nav{
    position:fixed;top:var(--bar-h);left:0;right:0;
    display:flex;flex-direction:column;
    max-height:calc(100vh - var(--bar-h) - var(--dock-h));
    overflow-y:auto;overscroll-behavior:contain;
    padding:16px var(--rail-pad) 20px;gap:14px;
    background:#0A1D19;border-bottom:1px solid var(--line);
    box-shadow:0 26px 44px -22px rgba(0,0,0,.9);
    opacity:0;visibility:hidden;transform:translateY(-10px);
    transition:opacity .22s var(--ease),transform .22s var(--ease),visibility .22s var(--ease);
  }
  .frame-header[data-open] .rail-nav{opacity:1;visibility:visible;transform:none}
  .rail-link{padding:13px 14px;font-size:16px}
  .rail-link[aria-current="page"]::before{left:calc(-1 * var(--rail-pad));height:26px;margin-top:-13px}
  .rail-actions{margin-top:6px;padding-top:6px;grid-template-columns:1fr 1fr}
  .rail-meta{padding-top:12px}

  .mobile-dock{
    display:flex;gap:10px;
    position:fixed;left:0;right:0;bottom:0;z-index:85;
    padding:10px 14px calc(10px + env(safe-area-inset-bottom));
    background:rgba(7,20,17,.96);
    border-top:1px solid var(--line);
  }
  .mobile-dock .btn{flex:1 1 0;padding:11px 12px;font-size:14px}

  .frame-progress{left:0}

  .grid-3{grid-template-columns:1fr}
  .media-grid{grid-template-columns:1fr}
  .footer-inner{grid-template-columns:1fr;gap:32px}
  .footer-cols{grid-template-columns:repeat(3,1fr);gap:18px}
  .footer-contact{grid-column:auto}
}

@media (max-width:640px){
  body{font-size:16px}
  .footer-cols{grid-template-columns:1fr 1fr;gap:22px}
  .footer-legal{padding-bottom:26px}
}

@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    transition-duration:.01ms !important;
    animation-duration:.01ms !important;
    animation-iteration-count:1 !important;
  }
  html.js [data-reveal]{opacity:1 !important;transform:none !important}
  .card:hover,.btn-primary:hover,.footer-links a:hover{transform:none}
  .frame-progress-bar{transition:none}
}