/* =========================================================
   GOGO赛场 · 共享 Site Kit
   文件位置：/assets/site.css
   负责：重置 / 令牌 / 中文排版 / 头部 / 页脚 / 通用组件
   ========================================================= */

/* ---------- 1. 设计令牌 ---------- */
:root{
  --ink-900:#061713;
  --ink-800:#0C2A22;
  --ink-700:#123c31;
  --lime:#C8FF3D;
  --sand:#E58A4B;
  --mist:#8C9A95;
  --bone:#F4F1E6;
  --wine:#5B2033;
  --indigo:#252A5C;
  --moss:#3F6B4F;

  --bone-78:rgba(244,241,230,.78);
  --bone-60:rgba(244,241,230,.60);
  --bone-16:rgba(244,241,230,.16);
  --bone-08:rgba(244,241,230,.08);
  --lime-28:rgba(200,255,61,.28);
  --lime-10:rgba(200,255,61,.10);

  --font-display:"Noto Serif SC","Source Han Serif SC","Songti SC","STSong",serif;
  --font-body:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-kicker:"Oswald","Barlow Condensed","Arial Narrow","PingFang SC",sans-serif;
  --font-mono:"IBM Plex Mono","JetBrains Mono","Roboto Mono",ui-monospace,SFMono-Regular,Menlo,monospace;

  --wrap:1320px;
  --gutter:clamp(1rem,4vw,3.5rem);
  --header-h:78px;

  --edge:2px solid rgba(244,241,230,.16);
  --shadow-hard:6px 6px 0 rgba(0,0,0,.55);
  --shadow-lime:6px 6px 0 rgba(200,255,61,.18);
  --ease:180ms cubic-bezier(.2,.7,.3,1);
}

/* ---------- 2. 重置 ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,p,ul,ol,figure,blockquote,dl,dd{margin:0}
ul,ol{padding:0;list-style:none}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
img,svg{display:block;max-width:100%}
table{border-collapse:collapse;width:100%}

/* ---------- 3. 基础与中文排版 ---------- */
body{
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  color:var(--bone);
  background-color:var(--ink-900);
  background-image:
    linear-gradient(rgba(140,154,149,.055) 1px,transparent 1px),
    linear-gradient(90deg,rgba(140,154,149,.055) 1px,transparent 1px);
  background-size:80px 80px,80px 80px;
  background-position:center top;
  background-attachment:fixed;
  min-height:100vh;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}

h1,h2,h3,h4,h5{
  font-family:var(--font-display);
  font-weight:900;
  line-height:1.22;
  letter-spacing:.01em;
}

p{text-wrap:pretty}
::selection{background:var(--lime);color:var(--ink-900)}

:focus-visible{
  outline:3px solid var(--lime);
  outline-offset:3px;
}

#main-content{scroll-margin-top:calc(var(--header-h) + 16px)}

/* ---------- 4. 通用工具类 ---------- */
.wrap{
  width:100%;
  max-width:var(--wrap);
  margin-inline:auto;
  padding-inline:var(--gutter);
}

.section{padding-block:clamp(2.6rem,5.5vw,4.8rem)}

.kicker{
  display:inline-flex;
  align-items:center;
  gap:.6rem;
  font-family:var(--font-kicker);
  font-size:.74rem;
  font-weight:600;
  letter-spacing:.26em;
  text-transform:uppercase;
  color:var(--lime);
}
.kicker::before{
  content:"";
  width:24px;
  height:2px;
  background:var(--sand);
  flex:none;
}

.display{
  font-family:var(--font-display);
  font-weight:900;
  font-size:clamp(1.9rem,4.4vw,3.4rem);
  line-height:1.12;
  letter-spacing:.005em;
}

.lede{
  max-width:62ch;
  font-size:clamp(1rem,1.35vw,1.12rem);
  line-height:1.85;
  color:var(--bone-78);
}

.mono{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  letter-spacing:.03em;
}

.tag{
  display:inline-block;
  padding:.2rem .55rem;
  font-family:var(--font-kicker);
  font-size:.68rem;
  font-weight:600;
  letter-spacing:.16em;
  text-transform:uppercase;
  border:1px solid var(--lime-28);
  color:var(--lime);
}
.tag--sand{border-color:rgba(229,138,75,.5);color:var(--sand)}
.tag--wine{border-color:rgba(91,32,51,.9);background:var(--wine);color:var(--bone)}
.tag--indigo{border-color:rgba(37,42,92,.9);background:var(--indigo);color:var(--bone)}

.visually-hidden{
  position:absolute;
  width:1px;height:1px;
  padding:0;margin:-1px;
  overflow:hidden;
  clip:rect(0 0 0 0);
  clip-path:inset(50%);
  white-space:nowrap;
  border:0;
}

/* ---------- 5. 跳至主内容 ---------- */
.skip-link{
  position:fixed;
  top:.6rem;
  left:.6rem;
  z-index:300;
  transform:translateY(-160%);
  padding:.7rem 1.15rem;
  font-weight:700;
  color:var(--ink-900);
  background:var(--lime);
  border:3px solid var(--ink-900);
  box-shadow:4px 4px 0 rgba(0,0,0,.5);
  transition:transform var(--ease);
}
.skip-link:focus{transform:translateY(0)}

/* ---------- 6. 页头 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:100;
  background:rgba(6,23,19,.94);
  border-bottom:3px solid var(--ink-700);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  transition:border-color var(--ease),box-shadow var(--ease);
}
.site-header[data-stuck="true"]{
  border-bottom-color:var(--lime);
  box-shadow:0 14px 34px rgba(0,0,0,.6);
}
.site-header::before{
  content:"";
  position:absolute;
  top:0;bottom:-3px;left:0;
  width:6px;
  background:linear-gradient(180deg,var(--lime),var(--sand) 48%,var(--moss));
  opacity:.85;
  pointer-events:none;
}

.header-frame{
  position:relative;
  width:100%;
  max-width:var(--wrap);
  margin-inline:auto;
  min-height:var(--header-h);
  padding:.55rem var(--gutter);
  display:grid;
  grid-template-columns:auto 1fr auto;
  align-items:center;
  gap:clamp(.75rem,2vw,2rem);
}

/* 品牌锁形 */
.brand{
  display:flex;
  align-items:center;
  gap:.72rem;
  flex:none;
}
.brand-mark{
  width:38px;height:38px;
  flex:none;
  display:grid;
  place-items:center;
  border:2px solid var(--lime);
  background:linear-gradient(135deg,rgba(200,255,61,.2),rgba(6,23,19,.2) 62%);
  box-shadow:3px 3px 0 rgba(200,255,61,.22);
  transition:box-shadow var(--ease),transform var(--ease);
}
.brand-mark::after{
  content:"";
  width:12px;height:12px;
  background:var(--lime);
}
.brand:hover .brand-mark{
  transform:translate(-1px,-1px);
  box-shadow:5px 5px 0 rgba(200,255,61,.4);
}
.brand-text{display:block;min-width:0}
.brand-name{
  display:block;
  font-family:var(--font-display);
  font-weight:900;
  font-size:1.14rem;
  line-height:1.15;
  color:var(--bone);
  white-space:nowrap;
}
.brand-tagline{
  display:block;
  font-family:var(--font-kicker);
  font-size:.64rem;
  letter-spacing:.3em;
  text-transform:uppercase;
  color:var(--mist);
  white-space:nowrap;
}

/* 主导航 */
.site-nav{
  display:flex;
  justify-content:center;
  min-width:0;
}
.nav-list{
  display:flex;
  align-items:center;
  gap:.15rem;
  flex-wrap:nowrap;
}
.nav-link{
  display:flex;
  align-items:baseline;
  gap:.42rem;
  padding:.45rem .7rem;
  font-size:.92rem;
  font-weight:500;
  color:rgba(244,241,230,.84);
  border:1px solid transparent;
  white-space:nowrap;
  transition:background var(--ease),color var(--ease),border-color var(--ease);
}
.nav-link::before{
  content:attr(data-index);
  font-family:var(--font-mono);
  font-size:.62rem;
  letter-spacing:.05em;
  color:var(--moss);
  transition:color var(--ease);
}
.nav-link:hover{
  color:var(--lime);
  background:var(--lime-10);
  border-color:var(--lime-28);
}
.nav-link[aria-current="page"]{
  background:var(--lime);
  border-color:var(--lime);
  color:var(--ink-900);
  font-weight:700;
}
.nav-link[aria-current="page"]::before{color:var(--wine)}

/* 页头操作区 */
.header-actions{
  display:flex;
  align-items:center;
  gap:.55rem;
  flex:none;
}

/* ---------- 7. 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.45rem;
  padding:.68rem 1.05rem;
  font-family:var(--font-body);
  font-size:.88rem;
  font-weight:700;
  line-height:1.3;
  letter-spacing:.02em;
  white-space:nowrap;
  border:2px solid var(--lime);
  background:var(--lime);
  color:var(--ink-900);
  box-shadow:4px 4px 0 rgba(0,0,0,.55);
  transition:transform var(--ease),box-shadow var(--ease),background var(--ease),color var(--ease),border-color var(--ease);
}
.btn:hover{
  transform:translate(-1px,-1px);
  box-shadow:6px 6px 0 rgba(0,0,0,.62);
}
.btn:active{
  transform:translate(2px,2px);
  box-shadow:1px 1px 0 rgba(0,0,0,.5);
}
.btn--signal{background:var(--lime);border-color:var(--lime);color:var(--ink-900)}
.btn--ghost{
  background:transparent;
  border-color:rgba(244,241,230,.34);
  color:var(--bone);
  box-shadow:none;
}
.btn--ghost:hover{
  background:var(--lime-10);
  border-color:var(--lime);
  color:var(--lime);
  box-shadow:4px 4px 0 rgba(200,255,61,.16);
}
.btn--sand{
  background:var(--sand);
  border-color:var(--sand);
  color:var(--ink-900);
}

/* 移动菜单按钮 */
.nav-toggle{
  display:none;
  align-items:center;
  justify-content:center;
  width:46px;
  height:44px;
  border:2px solid var(--lime);
  color:var(--lime);
  background:rgba(200,255,61,.06);
  transition:background var(--ease),color var(--ease);
}
.nav-toggle:hover{background:rgba(200,255,61,.16)}
.nav-toggle-bars{
  display:grid;
  gap:4px;
  width:20px;
}
.nav-toggle-bars span{
  display:block;
  height:2px;
  background:currentColor;
  transition:transform var(--ease),opacity var(--ease);
}
.nav-toggle[aria-expanded="true"]{
  background:var(--lime);
  color:var(--ink-900);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

/* 滚动进度 */
.header-progress{
  position:absolute;
  left:0;
  bottom:-3px;
  height:3px;
  width:0;
  background:var(--lime);
  box-shadow:0 0 12px rgba(200,255,61,.7);
  transition:width 120ms linear;
  z-index:2;
  pointer-events:none;
}

/* ---------- 8. 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(3rem,8vw,6rem);
  padding:clamp(2.2rem,5vw,3.8rem) 0 1.6rem;
  background-color:var(--ink-900);
  background-image:linear-gradient(180deg,rgba(12,42,34,.92),rgba(6,23,19,1) 62%);
  border-top:3px solid var(--ink-700);
}
.site-footer::before{
  content:"";
  position:absolute;
  top:0;left:0;right:0;
  height:8px;
  background-image:repeating-linear-gradient(90deg,var(--lime) 0 2px,transparent 2px 26px);
  opacity:.45;
  pointer-events:none;
}

.footer-inner{
  width:100%;
  max-width:var(--wrap);
  margin-inline:auto;
  padding-inline:var(--gutter);
  display:grid;
  grid-template-columns:minmax(0,1.5fr) minmax(0,.9fr) minmax(0,1.15fr);
  gap:clamp(1.6rem,3.5vw,3.2rem);
  align-items:start;
}

.footer-kicker{
  font-family:var(--font-mono);
  font-size:.68rem;
  letter-spacing:.24em;
  text-transform:uppercase;
  color:var(--sand);
  margin-bottom:.55rem;
}
.footer-entry{
  font-family:var(--font-display);
  font-weight:900;
  font-size:clamp(1.7rem,3.6vw,2.5rem);
  line-height:1.1;
  letter-spacing:.01em;
  color:var(--bone);
}
.footer-accent{color:var(--lime)}
.footer-note{
  margin-top:.85rem;
  max-width:42ch;
  font-size:.88rem;
  line-height:1.85;
  color:var(--bone-60);
}

.footer-col{min-width:0}
.footer-heading{
  font-family:var(--font-kicker);
  font-size:.72rem;
  font-weight:600;
  letter-spacing:.24em;
  text-transform:uppercase;
  color:var(--lime);
  padding-bottom:.5rem;
  margin-bottom:.7rem;
  border-bottom:2px solid var(--lime-28);
}

.footer-list li + li{margin-top:.1rem}
.footer-list a{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:.8rem;
  padding:.46rem 0;
  font-size:.92rem;
  color:rgba(244,241,230,.86);
  border-bottom:1px solid var(--bone-08);
  transition:color var(--ease),border-color var(--ease);
}
.footer-list a:hover{color:var(--lime);border-bottom-color:var(--lime-28)}
.footer-idx{
  font-family:var(--font-mono);
  font-size:.68rem;
  color:var(--moss);
}
.footer-ver{
  font-family:var(--font-mono);
  font-size:.72rem;
  color:var(--sand);
  letter-spacing:.04em;
}

.contact-list{margin-bottom:.85rem}
.contact-item{
  display:grid;
  gap:.1rem;
  padding:.46rem 0;
  border-bottom:1px solid var(--bone-08);
}
.contact-label{
  font-family:var(--font-mono);
  font-size:.66rem;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--mist);
}
.contact-value{
  font-size:.9rem;
  line-height:1.65;
  color:var(--bone);
  overflow-wrap:anywhere;
}
.contact-value--mono{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  letter-spacing:.05em;
}
.footer-col-link{
  display:inline-block;
  font-size:.86rem;
  font-weight:700;
  color:var(--lime);
  border-bottom:2px solid var(--lime-28);
  padding-bottom:.1rem;
  transition:border-color var(--ease),color var(--ease);
}
.footer-col-link:hover{border-bottom-color:var(--lime)}

.footer-meta{
  width:100%;
  max-width:var(--wrap);
  margin:clamp(1.8rem,3.5vw,3rem) auto 0;
  padding:1.1rem var(--gutter) 0;
  border-top:2px solid var(--bone-16);
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:.7rem 1.6rem;
  font-size:.8rem;
  color:var(--mist);
}
.footer-copy{line-height:1.6}
.footer-legal{
  display:flex;
  flex-wrap:wrap;
  gap:.4rem 1.2rem;
}
.footer-legal a{
  color:var(--mist);
  border-bottom:1px solid transparent;
  transition:color var(--ease),border-color var(--ease);
}
.footer-legal a:hover{color:var(--lime);border-bottom-color:var(--lime)}
.footer-icp{
  font-family:var(--font-mono);
  font-size:.76rem;
  letter-spacing:.04em;
  color:rgba(140,154,149,.9);
}

/* ---------- 9. 通用组件 ---------- */
.panel{
  position:relative;
  padding:clamp(1rem,2.2vw,1.6rem);
  background:var(--ink-800);
  border:var(--edge);
  box-shadow:var(--shadow-hard);
}
.panel--lime{border-color:var(--lime-28);box-shadow:var(--shadow-lime)}
.panel--sand{border-color:rgba(229,138,75,.55)}

.grid{display:grid;gap:clamp(1rem,2vw,1.5rem)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}

.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:.4rem;
  font-family:var(--font-mono);
  font-size:.76rem;
  letter-spacing:.04em;
  color:var(--mist);
}
.breadcrumb li{display:inline-flex;align-items:center}
.breadcrumb li + li::before{
  content:"/";
  margin-right:.4rem;
  color:var(--moss);
}
.breadcrumb a{
  color:var(--mist);
  border-bottom:1px solid rgba(140,154,149,.4);
  transition:color var(--ease),border-color var(--ease);
}
.breadcrumb a:hover{color:var(--lime);border-bottom-color:var(--lime)}
.breadcrumb [aria-current="page"]{color:var(--bone)}

/* 标签页 */
.tabs{display:block}
.tablist{
  display:flex;
  flex-wrap:wrap;
  gap:.35rem;
  padding-bottom:.5rem;
  border-bottom:3px solid var(--lime-28);
}
.tab{
  padding:.5rem .95rem;
  font-family:var(--font-kicker);
  font-size:.82rem;
  font-weight:600;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--bone-78);
  border:2px solid transparent;
  background:var(--ink-800);
  transition:background var(--ease),color var(--ease),border-color var(--ease);
}
.tab:hover{color:var(--lime);border-color:var(--lime-28)}
.tab[aria-selected="true"]{
  background:var(--lime);
  border-color:var(--lime);
  color:var(--ink-900);
}
.tabpanel{padding-top:1.2rem}
.tabpanel[hidden]{display:none}

/* 图片容器基础规则（页面阶段放 <img> 占位） */
.media-frame{
  position:relative;
  display:block;
  overflow:hidden;
  border:2px solid var(--bone-16);
  background-color:var(--ink-800);
  background-image:
    linear-gradient(135deg,rgba(63,107,79,.62),rgba(6,23,19,.95)),
    repeating-linear-gradient(90deg,rgba(140,154,149,.16) 0 1px,transparent 1px 46px);
  aspect-ratio:16 / 9;
}
.media-frame img{
  width:100%;
  height:100%;
  object-fit:cover;
  display:block;
  filter:saturate(.92) contrast(1.05);
}
.media-frame::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background-image:repeating-linear-gradient(0deg,rgba(0,0,0,.2) 0 1px,transparent 1px 3px);
  opacity:.3;
  mix-blend-mode:multiply;
}
.media-frame--wide{aspect-ratio:21 / 9}
.media-frame--tall{aspect-ratio:3 / 4}
.media-frame--square{aspect-ratio:1 / 1}
.media-caption{
  margin-top:.6rem;
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.06em;
  color:var(--mist);
}

/* ---------- 10. 响应式 ---------- */
@media (max-width:1180px){
  .header-frame{gap:.7rem}
  .nav-link{padding:.4rem .5rem;font-size:.85rem;gap:.3rem}
  .nav-link::before{font-size:.56rem}
  .header-actions .btn--ghost{display:none}
}

@media (max-width:1023px){
  .header-frame{grid-template-columns:1fr auto}
  .nav-toggle{display:inline-flex}

  .site-nav{
    position:absolute;
    top:100%;
    left:0;
    right:0;
    display:none;
    padding:.5rem var(--gutter) 1rem;
    background-color:var(--ink-800);
    background-image:linear-gradient(180deg,rgba(200,255,61,.06),transparent 45%);
    border-top:3px solid var(--lime);
    border-bottom:3px solid var(--ink-900);
    max-height:calc(100vh - var(--header-h) - 1rem);
    overflow-y:auto;
    box-shadow:0 22px 40px rgba(0,0,0,.65);
  }
  .site-nav[data-open="true"]{display:block}

  .nav-list{flex-direction:column;align-items:stretch;gap:0}
  .nav-link{
    padding:.85rem .25rem;
    font-size:1rem;
    border-bottom:1px solid var(--bone-08);
  }
  .nav-link:hover{background:transparent}
  .nav-link[aria-current="page"]{padding-left:.8rem}

  .btn--signal{padding:.58rem .72rem;font-size:.8rem}
  .brand-mark{width:34px;height:34px}
  .brand-name{font-size:1.04rem}

  .footer-inner{grid-template-columns:1fr 1fr}
  .footer-brand{grid-column:1 / -1}
}

@media (max-width:900px){
  .grid--2,.grid--3{grid-template-columns:1fr}
}

@media (max-width:560px){
  :root{--header-h:68px}
  .footer-inner{grid-template-columns:1fr}
  .footer-meta{justify-content:flex-start}
  .footer-entry{font-size:1.7rem}
  .brand-tagline{letter-spacing:.22em}
}

@media (max-width:420px){
  .brand-tagline{display:none}
  .btn--signal{padding:.52rem .6rem;font-size:.74rem}
  .nav-toggle{width:42px;height:40px}
}

/* ---------- 11. 减少动态效果 ---------- */
@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;
  }
  .btn:hover,.brand:hover .brand-mark{transform:none}
  .btn:active{transform:none}
}