/* ============================================================
   GOGO综合体育 — 共享站点样式 /assets/site.css
   策略：深墨底 + 苔原面板 + 青柠数据高亮 + 亮橙行动点
   ============================================================ */

:root{
  --ink:#0A1F19;
  --charcoal:#111413;
  --moss:#16332B;
  --lime:#C6FF3E;
  --orange:#FF6B1A;
  --amber:#E9B33C;
  --teal:#3ED0C4;
  --silver:#A9B6B1;
  --paper:#F3EFE3;
  --alert:#E5484D;

  --line:rgba(169,182,177,.20);
  --line-strong:rgba(169,182,177,.42);

  --font-display:"Helvetica Neue",Arial,"PingFang SC","Microsoft YaHei",sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Courier New",monospace;
  --font-body:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;

  --header-h:76px;
  --header-h-slim:56px;
  --shell-max:1240px;
  --shell-pad:clamp(18px,4vw,44px);
  --ease:cubic-bezier(.22,.61,.36,1);
}

@media (max-width:640px){
  :root{ --header-h:64px; }
}

/* ---------- reset ---------- */
*,*::before,*::after{ box-sizing:border-box; }
html{ -webkit-text-size-adjust:100%; scroll-behavior:smooth; }
body{ margin:0; }
h1,h2,h3,h4,p,dl,dd,figure,blockquote{ margin:0; }
ul,ol{ margin:0; padding:0; list-style:none; }
img,svg{ display:block; max-width:100%; }
a{ color:inherit; }
button{ font:inherit; color:inherit; }
table{ border-collapse:collapse; width:100%; }

/* ---------- 基础排版 ---------- */
body{
  background:var(--ink);
  color:var(--paper);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  letter-spacing:.004em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  background:
    radial-gradient(58% 42% at 10% -8%, rgba(198,255,62,.11), transparent 68%),
    radial-gradient(46% 38% at 98% 6%, rgba(62,208,196,.09), transparent 70%),
    radial-gradient(70% 48% at 48% 116%, rgba(255,107,26,.08), transparent 72%);
}
body.nav-open{ overflow:hidden; }

h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:900;
  letter-spacing:-.02em;
  line-height:1.05;
}
strong{ font-weight:700; color:var(--paper); }
::selection{ background:var(--lime); color:var(--ink); }

a:focus-visible,
button:focus-visible,
[tabindex]:focus-visible{
  outline:2px solid var(--lime);
  outline-offset:3px;
}

/* ---------- 无障碍工具 ---------- */
.skip-link{
  position:fixed;
  top:-72px;
  left:16px;
  z-index:200;
  padding:11px 18px;
  background:var(--lime);
  color:var(--ink);
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.08em;
  text-decoration:none;
  transition:top .18s var(--ease);
}
.skip-link:focus{ top:12px; }

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

.mono{ font-family:var(--font-mono); }

/* ============================================================
   头部
   ============================================================ */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:rgba(10,31,25,.96);
  border-bottom:1px solid var(--line);
}
.site-header[data-scrolled="true"]{
  box-shadow:0 14px 34px rgba(0,0,0,.46);
}
.header-shell{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  width:100%;
  max-width:var(--shell-max);
  margin:0 auto;
  padding-inline:var(--shell-pad);
  height:var(--header-h);
  transition:height .24s var(--ease);
}
.site-header[data-scrolled="true"] .header-shell{ height:var(--header-h-slim); }

.brand{
  display:flex;
  align-items:center;
  gap:12px;
  min-width:0;
  text-decoration:none;
  color:var(--paper);
}
.brand-mark{
  font-family:var(--font-display);
  font-weight:900;
  font-size:clamp(17px,2vw,21px);
  letter-spacing:-.02em;
  line-height:1;
  white-space:nowrap;
}
.brand-mark-accent{ color:var(--lime); }
.brand-season{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding-left:12px;
  border-left:1px solid var(--line-strong);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  color:var(--silver);
  white-space:nowrap;
}
.brand-season-dot{
  width:6px;height:6px;
  background:var(--lime);
  display:inline-block;
}

.nav-toggle{
  display:none;
  align-items:center;
  gap:10px;
  padding:9px 13px;
  background:transparent;
  border:1px solid var(--line-strong);
  color:var(--paper);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.14em;
  cursor:pointer;
  transition:border-color .18s var(--ease),color .18s var(--ease);
}
.nav-toggle:hover{ border-color:var(--lime); color:var(--lime); }
.nav-toggle-bars{ display:inline-flex; flex-direction:column; gap:4px; }
.nav-toggle-bars span{ display:block; width:16px; height:1.5px; background:var(--lime); }

.primary-nav{
  display:flex;
  align-items:center;
  gap:clamp(16px,2.4vw,34px);
}
.nav-list{
  display:flex;
  align-items:center;
  gap:clamp(14px,2vw,28px);
}
.nav-link{
  position:relative;
  display:inline-flex;
  align-items:baseline;
  gap:6px;
  padding:6px 0;
  color:var(--paper);
  font-size:15px;
  text-decoration:none;
  white-space:nowrap;
  transition:color .18s var(--ease);
}
.nav-index{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.06em;
  color:var(--silver);
  transition:color .18s var(--ease);
}
.nav-link::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:0;
  height:1px;
  background:var(--lime);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .22s var(--ease);
}
.nav-link:hover{ color:var(--lime); }
.nav-link:hover::after{ transform:scaleX(1); }
.nav-link[aria-current="page"]{ color:var(--lime); }
.nav-link[aria-current="page"]::after{ transform:scaleX(1); }
.nav-link[aria-current="page"] .nav-index{ color:var(--lime); }

.header-cta{
  display:inline-flex;
  align-items:center;
  padding:9px 16px;
  border:1px solid var(--lime);
  color:var(--lime);
  font-size:14px;
  text-decoration:none;
  white-space:nowrap;
  transition:background-color .18s var(--ease),color .18s var(--ease);
}
.header-cta:hover{ background:var(--lime); color:var(--ink); }

.scroll-progress{
  position:absolute;
  left:0;right:0;bottom:0;
  height:2px;
  background:rgba(169,182,177,.14);
}
.scroll-progress-bar{
  display:block;
  height:100%;
  width:100%;
  background:linear-gradient(90deg,var(--lime),var(--orange));
  transform:scaleX(0);
  transform-origin:0 50%;
}

.nav-scrim{
  position:fixed;
  inset:0;
  z-index:50;
  background:rgba(6,14,12,.74);
  opacity:0;
  visibility:hidden;
  transition:opacity .24s var(--ease),visibility .24s var(--ease);
}
.site-header[data-open="true"] .nav-scrim{ opacity:1; visibility:visible; }

/* ---------- 移动端导航面板 ---------- */
@media (max-width:900px){
  .nav-toggle{ display:inline-flex; }
  .primary-nav{
    position:fixed;
    top:0;right:0;bottom:0;
    z-index:60;
    display:flex;
    flex-direction:column;
    align-items:stretch;
    gap:0;
    width:min(84vw,340px);
    padding:calc(var(--header-h) + 14px) var(--shell-pad) 36px;
    background:var(--charcoal);
    border-left:1px solid var(--line);
    overflow-y:auto;
    transform:translateX(102%);
    transition:transform .28s var(--ease);
  }
  .site-header[data-open="true"] .primary-nav{ transform:translateX(0); }
  .nav-list{ flex-direction:column; align-items:stretch; gap:0; }
  .nav-item{ border-bottom:1px solid var(--line); }
  .nav-link{
    display:flex;
    width:100%;
    padding:16px 0 16px 2px;
    font-size:17px;
  }
  .nav-link .nav-index{ font-size:11px; }
  .nav-link::after{ display:none; }
  .nav-link[aria-current="page"]{ padding-left:12px; box-shadow:inset 2px 0 0 var(--lime); }
  .header-cta{
    justify-content:center;
    margin-top:26px;
    padding:14px 18px;
    font-size:15px;
  }
}

@media (max-width:560px){
  .brand-season{ display:none; }
}

/* ============================================================
   页脚
   ============================================================ */
.site-footer{
  position:relative;
  z-index:1;
  margin-top:clamp(48px,7vw,96px);
  background:var(--charcoal);
  border-top:1px solid var(--line);
}
.site-footer::before{
  content:"";
  position:absolute;
  top:0;left:0;
  width:min(320px,42%);
  height:2px;
  background:var(--lime);
}
.footer-shell{
  width:100%;
  max-width:var(--shell-max);
  margin:0 auto;
  padding:clamp(44px,6vw,76px) var(--shell-pad) 32px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1.2fr;
  gap:clamp(22px,3vw,44px);
}
.footer-brand{
  display:inline-block;
  font-family:var(--font-display);
  font-weight:900;
  font-size:22px;
  letter-spacing:-.02em;
  color:var(--paper);
  text-decoration:none;
}
.footer-brand:hover{ color:var(--lime); }
.footer-tag{
  margin-top:12px;
  max-width:26ch;
  color:var(--silver);
  font-size:14px;
  line-height:1.7;
}
.footer-season{
  display:flex;
  flex-direction:column;
  gap:4px;
  margin-top:18px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  color:var(--lime);
}
.footer-season-code{ color:var(--silver); }

.footer-title{
  margin-bottom:16px;
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:500;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--silver);
}
.footer-list{
  display:flex;
  flex-direction:column;
  gap:10px;
}
.footer-link{
  color:var(--paper);
  font-size:14.5px;
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.footer-link:hover{ color:var(--lime); border-bottom-color:var(--lime); }

.footer-contact{
  display:grid;
  grid-template-columns:auto 1fr;
  gap:6px 12px;
  margin-top:18px;
  padding-top:16px;
  border-top:1px solid var(--line);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.02em;
}
.footer-contact dt{ color:var(--silver); letter-spacing:.08em; }
.footer-contact dd{ color:var(--paper); word-break:break-all; }

.footer-meta{
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  gap:10px 24px;
  margin-top:clamp(32px,4vw,52px);
  padding-top:20px;
  border-top:1px solid var(--line);
}
.footer-meta-line{
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.06em;
  color:var(--silver);
}

@media (max-width:980px){
  .footer-grid{ grid-template-columns:1fr 1fr; }
}
@media (max-width:560px){
  .footer-grid{ grid-template-columns:1fr; }
  .footer-meta{ flex-direction:column; }
}

/* ============================================================
   通用容器与章节
   ============================================================ */
.container{
  position:relative;
  z-index:1;
  width:100%;
  max-width:var(--shell-max);
  margin-inline:auto;
  padding-inline:var(--shell-pad);
}
.container-narrow{ max-width:860px; }

.section{
  position:relative;
  z-index:1;
  padding-block:clamp(52px,7.5vw,110px);
}
.section-head{
  display:grid;
  gap:14px;
  margin-bottom:clamp(24px,3vw,44px);
}
.section-index{
  display:block;
  font-family:var(--font-mono);
  font-size:clamp(38px,6.4vw,80px);
  line-height:1;
  letter-spacing:-.02em;
  color:rgba(198,255,62,.16);
  -webkit-text-stroke:1px rgba(198,255,62,.44);
}
.section-title{
  font-size:clamp(26px,3.6vw,40px);
}
.section-lede{
  max-width:36ch;
  color:var(--silver);
  font-size:15.5px;
  line-height:1.75;
}
.eyebrow{
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--lime);
}
.prose{ max-width:34em; }
.prose p{ margin-bottom:1.1em; color:rgba(243,239,227,.9); }
.prose p:last-child{ margin-bottom:0; }

/* ============================================================
   网格与面板
   ============================================================ */
.grid{
  display:grid;
  gap:clamp(16px,2vw,26px);
}
.grid-2{ grid-template-columns:repeat(auto-fit,minmax(280px,1fr)); }
.grid-3{ grid-template-columns:repeat(auto-fit,minmax(240px,1fr)); }
.grid-4{ grid-template-columns:repeat(auto-fit,minmax(200px,1fr)); }

.panel{
  background:var(--moss);
  border:1px solid var(--line);
  padding:clamp(18px,2.2vw,26px);
}
.panel--outline{ background:transparent; border-color:var(--line-strong); }
.panel--slant{
  clip-path:polygon(0 0,100% 0,100% calc(100% - 22px),calc(100% - 22px) 100%,0 100%);
}
.panel--float{
  background:rgba(17,20,19,.92);
  border-color:rgba(198,255,62,.42);
  box-shadow:0 20px 44px rgba(0,0,0,.46);
}

/* ============================================================
   数据语法
   ============================================================ */
.data-figure{
  display:block;
  font-family:var(--font-mono);
  font-size:clamp(28px,4.6vw,54px);
  font-weight:700;
  line-height:1.1;
  letter-spacing:0;
  color:var(--lime);
}
.data-label{
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--silver);
}
.data-unit{
  font-family:var(--font-mono);
  font-size:13px;
  color:var(--silver);
  margin-left:6px;
}

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 10px;
  border:1px solid var(--line-strong);
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.1em;
  color:var(--silver);
  white-space:nowrap;
}
.tag--lime{ border-color:rgba(198,255,62,.5); color:var(--lime); }
.tag--orange{ border-color:rgba(255,107,26,.55); color:var(--orange); }
.tag--teal{ border-color:rgba(62,208,196,.5); color:var(--teal); }
.tag--alert{ border-color:rgba(229,72,77,.55); color:var(--alert); }

.rule{
  height:1px;
  border:0;
  background:var(--line);
}
.rule--lime{
  background:linear-gradient(90deg,var(--lime),rgba(198,255,62,0));
}

/* ============================================================
   按钮
   ============================================================ */
.btn{
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:12px 22px;
  border:1px solid transparent;
  font-size:15px;
  letter-spacing:.01em;
  text-decoration:none;
  cursor:pointer;
  transition:background-color .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.btn-primary{ background:var(--orange); border-color:var(--orange); color:#180C04; }
.btn-primary:hover{ background:#ff8342; border-color:#ff8342; }
.btn-ghost{ background:transparent; border-color:var(--line-strong); color:var(--paper); }
.btn-ghost:hover{ border-color:var(--lime); color:var(--lime); }
.btn-lime{ background:transparent; border-color:var(--lime); color:var(--lime); }
.btn-lime:hover{ background:var(--lime); color:var(--ink); }

/* ============================================================
   面包屑
   ============================================================ */
.breadcrumb{ margin-bottom:clamp(18px,2.4vw,30px); }
.breadcrumb-list{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.1em;
}
.breadcrumb-item{ color:var(--silver); }
.breadcrumb-link{
  color:var(--silver);
  text-decoration:none;
  transition:color .18s var(--ease);
}
.breadcrumb-link:hover{ color:var(--lime); }
.breadcrumb-sep{ color:rgba(169,182,177,.5); }

/* ============================================================
   目录索引（滚动高亮）
   ============================================================ */
.toc{ position:relative; }
.toc-list{
  display:flex;
  flex-direction:column;
  gap:2px;
}
.toc-link{
  display:flex;
  align-items:baseline;
  gap:10px;
  padding:9px 0 9px 12px;
  color:var(--silver);
  font-size:14px;
  text-decoration:none;
  border-left:2px solid var(--line);
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.toc-link:hover{ color:var(--paper); border-left-color:var(--line-strong); }
.toc-link[data-active="true"]{
  color:var(--lime);
  border-left-color:var(--lime);
}

/* ============================================================
   图片容器（页面阶段放占位图）
   ============================================================ */
.media-frame{
  position:relative;
  overflow:hidden;
  background:var(--charcoal);
  border:1px solid var(--line);
}
.media-frame img{
  width:100%;
  height:100%;
  object-fit:cover;
}
.media-frame--band{ aspect-ratio:21/9; }
.media-frame--wide{ aspect-ratio:16/9; }
.media-frame--square{ aspect-ratio:1/1; }
.media-frame--tall{ aspect-ratio:3/4; }
.media-frame::after{
  content:"";
  position:absolute;
  right:10px;bottom:10px;
  width:22px;height:1px;
  background:var(--lime);
  opacity:.75;
  pointer-events:none;
}

/* ============================================================
   入场显现
   ============================================================ */
[data-reveal]{
  opacity:0;
  transform:translateY(12px);
  transition:opacity .24s var(--ease),transform .24s var(--ease);
}
[data-reveal][data-visible="true"]{
  opacity:1;
  transform:none;
}

/* ============================================================
   动效降级
   ============================================================ */
@media (prefers-reduced-motion:reduce){
  html{ scroll-behavior:auto; }
  *,*::before,*::after{
    animation-duration:.001ms!important;
    animation-iteration-count:1!important;
    transition-duration:.001ms!important;
  }
  [data-reveal]{ opacity:1; transform:none; }
  .primary-nav{ transition:none; }
}