/* ===========================================================
   NG体育入口 — /assets/site.css
   共享骨架：重置 / 变量 / 中英排版 / 头部轨道 / 页脚底栏 / 基础组件
   =========================================================== */

:root{
  --ink:#08090B;
  --panel:#111317;
  --panel-2:#161A1F;
  --rail:#2C2F36;
  --lime:#C6FF00;
  --lime-hi:#E8FF66;
  --red:#FF3B30;
  --purple:#A259FF;
  --cyan:#00E0B8;
  --white:#F2F5F7;
  --steel:#8B95A1;
  --bar-h:66px;
  --head-h:calc(var(--bar-h) + 3px);
  --rail-w:236px;
  --wrap:1200px;
  --mono:ui-monospace,"JetBrains Mono","IBM Plex Mono",SFMono-Regular,Menlo,Consolas,monospace;
  --sans:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
}

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  padding-top:var(--head-h);
  min-height:100vh;
  background:var(--ink);
  color:var(--white);
  font-family:var(--sans);
  font-size:16px;
  font-weight:400;
  line-height:1.8;
  letter-spacing:.005em;
  overflow-x:hidden;
}
main{display:block}
h1,h2,h3,h4,h5{font-weight:900;line-height:1.08;letter-spacing:-.01em;color:var(--white);margin:0 0 .6em}
h1{font-size:clamp(30px,5vw,60px)}
h2{font-size:clamp(24px,3.4vw,40px)}
h3{font-size:clamp(18px,2.2vw,24px);line-height:1.25}
h4{font-size:16px;line-height:1.3}
p{margin:0 0 1.1em}
a{color:var(--lime);text-decoration:none;transition:color .2s ease}
a:hover{color:var(--lime-hi)}
img{display:block;max-width:100%;height:auto;border:0}
ul,ol{margin:0 0 1.1em;padding-left:1.2em}
code,kbd,samp,pre{font-family:var(--mono)}
::selection{background:var(--lime);color:#08090B}
:focus-visible{outline:2px solid var(--lime);outline-offset:3px}

/* ---------- 容器与通用版式 ---------- */
.wrap{width:min(100% - 32px,var(--wrap));margin-inline:auto}
@media (min-width:760px){.wrap{width:min(100% - 56px,var(--wrap))}}
@media (min-width:1024px){body{padding-left:var(--rail-w)}}

.section{position:relative;padding:clamp(48px,7vw,96px) 0}
.section-head{max-width:780px;margin-bottom:clamp(24px,4vw,46px)}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;margin:0 0 14px;
  font-family:var(--mono);font-size:11px;font-weight:700;
  letter-spacing:.16em;text-transform:uppercase;color:var(--lime);
}
.eyebrow::before{content:"";width:26px;height:2px;background:currentColor;flex:0 0 auto}
.display{font-size:clamp(30px,5.2vw,62px);line-height:1.04;font-weight:900;letter-spacing:-.015em;margin:0}
.lede{max-width:64ch;margin:16px 0 0;font-size:clamp(15px,1.5vw,18px);line-height:1.85;color:var(--steel)}

.panel{
  position:relative;background:var(--panel);border:1px solid var(--rail);
  padding:clamp(20px,3vw,40px);box-shadow:0 34px 70px -52px #000;
}
.panel--accent{border-left:6px solid var(--lime)}
.panel + .panel{margin-top:clamp(16px,2.4vw,28px)}

.grid{display:grid;gap:clamp(16px,2.4vw,28px);grid-template-columns:1fr}
@media (min-width:760px){
  .grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid--3{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (min-width:1080px){
  .grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;gap:10px;
  padding:12px 20px;border:2px solid var(--rail);background:var(--panel);
  color:var(--white);font-family:var(--sans);font-size:14px;font-weight:800;
  letter-spacing:.02em;line-height:1.2;text-decoration:none;cursor:pointer;
  box-shadow:6px 6px 0 0 rgba(0,0,0,.85);
  transition:transform .18s ease,border-color .18s ease,color .18s ease,background-color .18s ease;
}
.btn:hover{transform:translate(-2px,-2px);border-color:var(--lime);color:var(--lime-hi)}
.btn--primary{background:var(--lime);border-color:var(--lime);color:#08090B}
.btn--primary:hover{background:var(--lime-hi);border-color:var(--lime-hi);color:#08090B}
.btn--ghost{background:transparent}
.btn-row{display:flex;flex-wrap:wrap;gap:14px;margin:26px 0 0}

/* ---------- 面包屑 ---------- */
.crumbs{padding:18px 0 0}
.crumbs-list{
  display:flex;flex-wrap:wrap;gap:8px;margin:0;padding:0;list-style:none;
  font-family:var(--mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--steel);
}
.crumbs-item{display:flex;align-items:center;gap:8px}
.crumbs-item + .crumbs-item::before{content:"/";color:var(--rail)}
.crumbs-list a{color:var(--steel)}
.crumbs-list a:hover{color:var(--lime)}
.crumbs-item[aria-current="page"]{color:var(--white)}

/* ---------- 标签 ---------- */
.tag{
  display:inline-flex;align-items:center;gap:6px;padding:4px 9px;
  border:1px solid var(--rail);color:var(--steel);
  font-family:var(--mono);font-size:10.5px;font-weight:700;
  letter-spacing:.12em;text-transform:uppercase;line-height:1.4;
}
.tag--lime{color:var(--lime);border-color:rgba(198,255,0,.42)}
.tag--red{color:var(--red);border-color:rgba(255,59,48,.45)}
.tag--purple{color:var(--purple);border-color:rgba(162,89,255,.45)}
.tag--cyan{color:var(--cyan);border-color:rgba(0,224,184,.42)}

/* ---------- 图片容器（供页面阶段使用） ---------- */
.media-frame{
  position:relative;display:block;overflow:hidden;
  background:var(--panel-2);border:2px solid var(--rail);
}
.media-frame img{width:100%;aspect-ratio:16/9;object-fit:cover}
.media-frame--wide img{aspect-ratio:21/9}
.media-frame--tall img{aspect-ratio:3/4}
.media-frame::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(180deg,rgba(8,9,11,0) 45%,rgba(8,9,11,.72) 100%);
}
.media-caption{display:block;margin-top:10px;font-family:var(--mono);font-size:11px;letter-spacing:.08em;color:var(--steel)}

/* ---------- 框景与滚动协议 ---------- */
.frame{position:relative;border:1px solid var(--rail)}
.frame::before,.frame::after{content:"";position:absolute;width:18px;height:18px;border:2px solid var(--lime);pointer-events:none}
.frame::before{top:-2px;left:-2px;border-right:0;border-bottom:0}
.frame::after{right:-2px;bottom:-2px;border-top:0;border-left:0}

[data-section]{position:relative;scroll-margin-top:calc(var(--head-h) + 28px)}
[data-section]::after{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,var(--lime),rgba(198,255,0,0));
  transform:scaleX(0);transform-origin:left center;transition:transform .7s ease;
}
[data-section].is-current::after{transform:scaleX(1)}
[data-section].is-current .eyebrow{color:var(--lime-hi)}

html[data-js="ready"] [data-reveal]{opacity:0;transform:translateY(14px)}
[data-reveal]{transition:opacity .6s ease,transform .6s ease}
[data-reveal].is-in{opacity:1;transform:none}

/* ===========================================================
   头部：固定状态条 + 顶部进度 + 侧边坐标轨道
   =========================================================== */
.skip-link{
  position:fixed;top:8px;left:8px;z-index:400;
  padding:10px 16px;background:var(--lime);color:#08090B;
  font-size:13px;font-weight:800;letter-spacing:.02em;text-decoration:none;
  transform:translateY(-160%);transition:transform .2s ease;
}
.skip-link:focus{transform:translateY(0);color:#08090B}

.site-header{position:fixed;top:0;left:0;right:0;z-index:120}

.header-bar{
  display:flex;align-items:center;gap:16px;
  height:var(--bar-h);padding:0 16px;
  background:rgba(8,9,11,.94);
  -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
  border-bottom:1px solid var(--rail);
}
@media (min-width:1024px){.header-bar{padding:0 24px}}

.brand{display:inline-flex;align-items:center;gap:12px;color:var(--white);text-decoration:none;min-width:0}
.brand:hover{color:var(--white)}
.brand-mark{position:relative;display:block;flex:0 0 auto;width:26px;height:26px;border:2px solid var(--lime)}
.brand-mark-line{position:absolute;top:-5px;bottom:-5px;left:50%;width:2px;background:var(--lime);transform:translateX(-50%)}
.brand-text{display:block;min-width:0}
.brand-name{display:block;font-size:17px;font-weight:900;line-height:1.1;letter-spacing:.02em;white-space:nowrap}
.brand-sub{display:block;margin-top:2px;font-size:11px;line-height:1.3;color:var(--steel);letter-spacing:.04em;white-space:nowrap}

.header-utility{display:flex;align-items:center;gap:12px;margin-left:auto}

.status-pod{
  display:inline-flex;align-items:center;gap:8px;margin:0;padding:6px 12px;
  border:1px solid var(--rail);background:var(--panel);
  font-family:var(--mono);font-size:11px;font-weight:500;
  letter-spacing:.08em;text-transform:uppercase;color:var(--steel);line-height:1.4;
}
.status-dot{
  display:block;flex:0 0 auto;width:8px;height:8px;background:var(--lime);
  animation:pulse 2.6s ease-out infinite;
}
@keyframes pulse{
  0%{box-shadow:0 0 0 0 rgba(198,255,0,.55)}
  70%{box-shadow:0 0 0 8px rgba(198,255,0,0)}
  100%{box-shadow:0 0 0 0 rgba(198,255,0,0)}
}
.status-code{color:var(--lime);font-weight:700}

.lang-switch{display:inline-flex;border:1px solid var(--rail);background:var(--panel)}
.lang-btn{
  appearance:none;border:0;background:transparent;cursor:pointer;
  padding:7px 10px;color:var(--steel);
  font-family:var(--mono);font-size:11px;font-weight:700;letter-spacing:.1em;
}
.lang-btn:hover{color:var(--white)}
.lang-btn.is-active{background:var(--lime);color:#08090B}

.nav-toggle{
  display:inline-flex;align-items:center;gap:10px;cursor:pointer;
  padding:8px 12px;border:1px solid var(--rail);background:transparent;color:var(--white);
  font-family:var(--sans);font-size:12px;font-weight:800;letter-spacing:.08em;
}
.nav-toggle:hover{border-color:var(--lime);color:var(--lime-hi)}
.nav-toggle-label{white-space:nowrap}
.nav-toggle-bars{display:inline-flex;flex-direction:column;gap:3px;width:16px}
.nav-toggle-bars span{display:block;height:2px;width:100%;background:var(--lime)}
.nav-toggle-bars span:nth-child(2){width:68%}

.progress-track{position:relative;height:3px;background:var(--rail);overflow:hidden}
.progress-bar{
  display:block;width:0;height:100%;
  background:linear-gradient(90deg,var(--lime),var(--cyan));
  transition:width .15s linear;
}

/* 侧边轨道 / 移动抽屉 */
.site-nav{
  position:fixed;top:var(--head-h);bottom:0;left:0;z-index:200;
  display:flex;flex-direction:column;
  width:min(320px,84vw);overflow-y:auto;
  background:var(--panel);border-right:1px solid var(--rail);
  transform:translateX(-102%);
  transition:transform .28s ease;
}
.site-nav[data-open]{transform:translateX(0)}
html[data-nav-locked]{overflow:hidden}

.nav-head{
  display:flex;align-items:baseline;justify-content:space-between;gap:10px;
  margin:0;padding:14px 16px;border-bottom:1px solid var(--rail);
  font-family:var(--mono);font-size:10.5px;font-weight:700;
  letter-spacing:.14em;text-transform:uppercase;color:var(--steel);
}
.nav-head-code{color:var(--lime)}
.nav-head-note{color:var(--steel)}

.nav-list{display:flex;flex-direction:column;margin:0;padding:10px 0;list-style:none}
.nav-item{margin:0}
.nav-link{
  display:flex;align-items:center;gap:12px;
  padding:12px 16px;border-left:3px solid transparent;
  color:var(--white);text-decoration:none;
  transition:background-color .2s ease,border-color .2s ease;
}
.nav-link:hover{background:var(--panel-2);border-left-color:var(--lime-hi);color:var(--white)}
.nav-idx{flex:0 0 auto;min-width:22px;font-family:var(--mono);font-size:11px;font-weight:700;color:var(--steel);letter-spacing:.06em}
.nav-text{display:block;min-width:0}
.nav-cn{display:block;font-size:15px;font-weight:800;line-height:1.3;letter-spacing:.01em}
.nav-en{display:block;margin-top:2px;font-family:var(--mono);font-size:10px;font-weight:500;letter-spacing:.12em;color:var(--steel)}
.nav-link[aria-current="page"]{
  border-left-color:var(--lime);
  background:linear-gradient(90deg,rgba(198,255,0,.16),rgba(198,255,0,0) 78%);
}
.nav-link[aria-current="page"] .nav-idx{color:var(--lime)}
.nav-link[aria-current="page"] .nav-en{color:var(--lime-hi)}

.nav-foot{
  display:flex;flex-direction:column;gap:4px;
  margin-top:auto;padding:16px;border-top:1px solid var(--rail);
  font-family:var(--mono);font-size:10.5px;letter-spacing:.1em;
  text-transform:uppercase;color:var(--steel);
}
.nav-foot-code{color:var(--purple)}
.nav-foot-note{color:var(--steel)}

.nav-scrim{
  position:fixed;inset:0;z-index:190;
  background:rgba(4,5,7,.72);
  opacity:0;visibility:hidden;pointer-events:none;
  transition:opacity .26s ease,visibility .26s ease;
}
.nav-scrim[data-open]{opacity:1;visibility:visible;pointer-events:auto}

html[data-lang="en"] .nav-cn{color:var(--steel);font-weight:500}
html[data-lang="en"] .nav-en{color:var(--white)}

@media (min-width:1024px){
  .site-nav{width:var(--rail-w);transform:none;z-index:100}
  .nav-scrim{display:none}
  .nav-toggle{display:none}
}
@media (min-width:1024px) and (max-width:1199px){
  :root{--rail-w:88px}
  .nav-text{display:none}
  .nav-link{flex-direction:column;align-items:flex-start;gap:4px;padding:14px 14px}
  .nav-head{padding:14px 10px;font-size:9.5px}
  .nav-head-note{display:none}
  .nav-idx{min-width:0;font-size:14px;color:var(--white)}
  .nav-foot{padding:14px 10px;font-size:9.5px}
  .nav-foot-note{display:none}
}
@media (max-width:719px){
  .brand-sub{display:none}
  .status-text{display:none}
}
@media (max-width:559px){
  .lang-switch{display:none}
  .nav-toggle-label{display:none}
  .header-bar{gap:10px;padding:0 12px}
}

/* ===========================================================
   页脚：刻度条 + 三列轨道 + 联络带 + 底栏
   =========================================================== */
.site-footer{margin-top:clamp(40px,6vw,88px);background:var(--panel);border-top:1px solid var(--rail)}
.footer-scale{
  height:12px;border-bottom:1px solid var(--rail);opacity:.9;
  background-image:repeating-linear-gradient(90deg,var(--rail) 0 1px,rgba(0,0,0,0) 1px 14px);
}
.footer-inner{
  display:grid;grid-template-columns:1fr;gap:32px 40px;
  padding:clamp(30px,5vw,58px) 0;
}
@media (min-width:640px){
  .footer-inner{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-brand{grid-column:1 / -1}
}
@media (min-width:1080px){
  .footer-inner{grid-template-columns:1.5fr repeat(3,minmax(0,1fr))}
  .footer-brand{grid-column:auto}
}

.footer-brand-name{margin:0;font-size:22px;font-weight:900;line-height:1.15;letter-spacing:.01em}
.footer-brand-sub{margin:6px 0 0;font-size:13px;color:var(--steel)}
.footer-status{
  display:flex;align-items:center;gap:8px;margin:16px 0 0;
  font-family:var(--mono);font-size:11px;font-weight:500;
  letter-spacing:.08em;text-transform:uppercase;color:var(--steel);
}
.footer-meta{margin:10px 0 0;font-family:var(--mono);font-size:11px;letter-spacing:.08em;color:var(--steel);opacity:.7}

.footer-col{min-width:0}
.footer-heading{
  margin:0 0 14px;font-family:var(--mono);font-size:11px;font-weight:700;
  letter-spacing:.16em;text-transform:uppercase;color:var(--lime);
}
.footer-list{display:flex;flex-direction:column;gap:10px;margin:0;padding:0;list-style:none}
.footer-link{
  display:inline-block;padding-bottom:2px;border-bottom:1px solid transparent;
  color:var(--steel);font-size:14px;line-height:1.6;
}
.footer-link:hover{color:var(--white);border-bottom-color:var(--lime)}

.footer-contact-strip{background:var(--ink);border-top:1px solid var(--rail);border-bottom:1px solid var(--rail)}
.footer-contact-inner{display:flex;flex-wrap:wrap;gap:10px 34px;padding:18px 0}
.footer-contact-line{
  display:flex;align-items:baseline;gap:10px;margin:0;
  font-size:13px;line-height:1.7;color:var(--white);word-break:break-word;
}
.footer-contact-key{
  font-family:var(--mono);font-size:10.5px;font-weight:700;
  letter-spacing:.14em;color:var(--cyan);text-transform:uppercase;
}
.footer-note{flex:0 0 100%;margin:0;font-size:12px;line-height:1.7;color:var(--steel)}

.footer-base{background:var(--panel)}
.footer-base-inner{
  display:flex;flex-wrap:wrap;align-items:center;gap:12px 26px;
  padding:16px 0 22px;
}
.footer-legal{margin:0;font-family:var(--mono);font-size:11px;letter-spacing:.06em;color:var(--steel)}
.footer-legal-links{display:flex;flex-wrap:wrap;gap:8px 20px;margin:0 0 0 auto;padding:0;list-style:none}
.footer-legal-links a{font-size:12px;color:var(--steel)}
.footer-legal-links a:hover{color:var(--lime)}
.top-btn{
  appearance:none;cursor:pointer;padding:8px 14px;
  border:1px solid var(--rail);background:transparent;color:var(--steel);
  font-family:var(--mono);font-size:11px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;
}
.top-btn:hover{border-color:var(--lime);color:var(--lime)}

/* ===========================================================
   降级与无障碍
   =========================================================== */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .status-dot{animation:none;box-shadow:0 0 0 3px rgba(198,255,0,.22)}
  html[data-js="ready"] [data-reveal]{opacity:1;transform:none}
  [data-section]::after{transform:scaleX(1)}
  .btn:hover{transform:none}
}
@media print{
  .site-header,.site-footer,.nav-scrim,.skip-link{display:none}
  body{padding:0;background:#fff;color:#000}
}