/* ===========================================================
   HO体育 · /assets/site.css
   深夜球场指挥中心：深墨黑底 + 草皮深绿承载 + 夜灯绿结构
   + 电光橙限量强调 + 冷银灰过渡
   =========================================================== */

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

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

body,
h1,h2,h3,h4,p,figure,blockquote,dl,dd{margin:0}

ul,ol{padding:0;list-style:none}

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

button{font:inherit;color:inherit;background:none;border:0}

a{color:inherit;text-decoration:none}

table{border-collapse:collapse;width:100%}

/* ---------- 变量 ---------- */
:root{
  /* 色彩 */
  --night-900:#05100B;
  --turf-800:#0B2A1E;
  --turf-600:#10583A;
  --neon-450:#34D98B;
  --volt-500:#FF6A1A;
  --volt-600:#D14A05;
  --silver-300:#B9C7C0;
  --silver-100:#E8F0EC;
  --paper-000:#F6FAF7;

  --line:rgba(185,199,192,.18);
  --line-strong:rgba(185,199,192,.34);

  /* 字体 */
  --font-body:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans CJK SC","Heiti SC",sans-serif;
  --font-display:"Arial Narrow","Helvetica Neue",Arial,var(--font-body);
  --font-mono:ui-monospace,"SFMono-Regular",Menlo,Consolas,"Roboto Mono","DejaVu Sans Mono",monospace;

  /* 字阶 12/14/16/20/26/36/56/88 */
  --fs-100:.75rem;
  --fs-200:.875rem;
  --fs-300:1rem;
  --fs-400:1.25rem;
  --fs-500:1.625rem;
  --fs-600:2.25rem;
  --fs-700:3.5rem;
  --fs-800:5.5rem;

  /* 尺度 */
  --shell:1180px;
  --gutter:clamp(16px,4vw,40px);
  --radius-sm:10px;
  --radius-md:18px;
  --radius-lg:28px;
  --radius-pill:999px;

  --shadow-island:0 20px 44px rgba(0,0,0,.5);
  --shadow-card:0 16px 34px rgba(0,0,0,.32);
  --ease:cubic-bezier(.22,.61,.36,1);
}

/* ---------- 基座 ---------- */
body{
  min-height:100vh;
  background-color:var(--night-900);
  background-image:
    radial-gradient(1100px 620px at 84% -12%, rgba(52,217,139,.11), transparent 62%),
    radial-gradient(880px 520px at -8% 24%, rgba(255,106,26,.07), transparent 66%),
    repeating-linear-gradient(90deg, rgba(232,240,236,.022) 0 1px, transparent 1px 118px);
  background-attachment:fixed;
  color:var(--silver-100);
  font-family:var(--font-body);
  font-size:var(--fs-300);
  line-height:1.75;
  overflow-x:hidden;
}

#main-content{scroll-margin-top:110px}

h1,h2,h3,h4{
  font-weight:900;
  line-height:1.14;
  letter-spacing:-.015em;
  color:var(--silver-100);
}

:focus-visible{
  outline:2px solid var(--neon-450);
  outline-offset:3px;
  border-radius:6px;
}

::selection{background:var(--neon-450);color:var(--night-900)}

/* ---------- 布局骨架 ---------- */
.container{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding-inline:var(--gutter);
}

.section{padding-block:clamp(52px,7.5vw,104px)}

.section-head{
  display:grid;
  gap:14px;
  margin-bottom:clamp(26px,3.6vw,46px);
  max-width:52rem;
}

.grid{display:grid;gap:clamp(16px,2.4vw,30px)}
.grid-2{grid-template-columns:repeat(auto-fit,minmax(280px,1fr))}
.grid-3{grid-template-columns:repeat(auto-fit,minmax(232px,1fr))}
.grid-12{
  display:grid;
  grid-template-columns:repeat(12,minmax(0,1fr));
  gap:clamp(16px,2.4vw,28px);
}

.rail{
  display:flex;
  gap:clamp(14px,2vw,22px);
  overflow-x:auto;
  scroll-snap-type:x mandatory;
  padding:4px 4px 18px;
  scrollbar-color:var(--turf-600) transparent;
}
.rail > *{
  flex:0 0 auto;
  scroll-snap-align:start;
}
.rail::-webkit-scrollbar{height:6px}
.rail::-webkit-scrollbar-track{background:rgba(185,199,192,.1);border-radius:var(--radius-pill)}
.rail::-webkit-scrollbar-thumb{background:var(--turf-600);border-radius:var(--radius-pill)}

.rule{
  height:1px;
  border:0;
  margin:0;
  background:var(--line);
}

/* ---------- 文字组件 ---------- */
.display-title{
  font-size:clamp(2.35rem,7vw,5.5rem);
  font-weight:900;
  line-height:1.02;
  letter-spacing:-.035em;
  color:var(--silver-100);
}

.section-title{
  font-size:clamp(1.55rem,3.5vw,2.5rem);
  font-weight:900;
  letter-spacing:-.02em;
}

.lede{
  font-size:clamp(1.02rem,1.5vw,1.22rem);
  line-height:1.72;
  color:var(--silver-300);
  max-width:34em;
}

.numeric{
  font-family:var(--font-display);
  font-weight:200;
  font-stretch:condensed;
  font-variant-numeric:tabular-nums;
  letter-spacing:-.04em;
  line-height:.92;
}

.kicker{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:var(--fs-100);
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--neon-450);
}
.kicker::before{
  content:"";
  width:26px;
  height:2px;
  background:var(--volt-500);
}

.section-num{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-size:var(--fs-200);
  letter-spacing:.12em;
  color:var(--volt-500);
}

.chapter-band{
  display:flex;
  align-items:baseline;
  gap:14px;
  padding:13px 20px;
  border-left:3px solid var(--neon-450);
  border-radius:var(--radius-md);
  background:linear-gradient(90deg, rgba(16,88,58,.6), rgba(16,88,58,0));
}

.chip{
  display:inline-flex;
  align-items:center;
  padding:5px 12px;
  border-radius:var(--radius-pill);
  border:1px solid rgba(52,217,139,.35);
  background:rgba(52,217,139,.08);
  color:var(--neon-450);
  font-family:var(--font-mono);
  font-size:var(--fs-100);
  letter-spacing:.06em;
  white-space:nowrap;
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:12px 22px;
  border:1px solid transparent;
  border-radius:var(--radius-pill);
  font-size:var(--fs-200);
  font-weight:700;
  line-height:1.2;
  cursor:pointer;
  transition:background .2s var(--ease), color .2s var(--ease),
             border-color .2s var(--ease), transform .2s var(--ease);
}
.btn:hover{transform:translateY(-1px)}
.btn:active{transform:translateY(0)}

.btn-primary{
  background:var(--volt-500);
  color:var(--night-900);
}
.btn-primary:hover{background:var(--volt-600);color:var(--silver-100)}

.btn-ghost{
  background:transparent;
  border-color:var(--line-strong);
  color:var(--silver-100);
}
.btn-ghost:hover{border-color:var(--neon-450);color:var(--neon-450)}

.btn-sm{padding:9px 16px;font-size:var(--fs-100)}

/* ---------- 容器组件 ---------- */
.surface{
  background:rgba(11,42,30,.55);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
}

.data-card{
  display:grid;
  gap:12px;
  padding:clamp(18px,2.4vw,28px);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  background:linear-gradient(158deg, rgba(16,88,58,.5), rgba(11,42,30,.72) 62%, rgba(5,16,11,.9));
  box-shadow:var(--shadow-card);
  transition:border-color .22s var(--ease), transform .22s var(--ease);
}
.data-card:hover{
  border-color:rgba(52,217,139,.45);
  transform:translateY(-3px);
}

.stat{display:grid;gap:4px}
.stat-value{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-weight:700;
  font-size:clamp(1.6rem,3.4vw,2.5rem);
  line-height:1.05;
  letter-spacing:-.02em;
  color:var(--volt-500);
}
.stat-label{
  font-family:var(--font-mono);
  font-size:var(--fs-100);
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--silver-300);
}

/* ---------- 面包屑 ---------- */
.breadcrumb{
  font-family:var(--font-mono);
  font-size:var(--fs-100);
  color:var(--silver-300);
}
.breadcrumb ol{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
}
.breadcrumb li{
  display:flex;
  align-items:center;
  gap:8px;
}
.breadcrumb li + li::before{
  content:"/";
  color:rgba(185,199,192,.42);
}
.breadcrumb a{color:var(--silver-300);transition:color .18s var(--ease)}
.breadcrumb a:hover{color:var(--neon-450)}
.breadcrumb [aria-current="page"]{color:var(--neon-450)}

/* ---------- 正文 ---------- */
.prose{
  max-width:42rem;
  color:var(--silver-300);
  line-height:1.85;
}
.prose > * + *{margin-top:1.15em}
.prose h2{
  font-size:var(--fs-500);
  color:var(--silver-100);
  margin-top:2.1em;
  letter-spacing:-.015em;
}
.prose h3{
  font-size:var(--fs-400);
  color:var(--silver-100);
  margin-top:1.8em;
}
.prose strong{color:var(--silver-100)}
.prose a{color:var(--neon-450);text-decoration:underline;text-underline-offset:3px}
.prose ul,.prose ol{padding-left:1.3em;display:grid;gap:.55em}
.prose ul li{list-style:square}
.prose ol li{list-style:decimal}
.prose li::marker{color:var(--neon-450)}
.prose blockquote{
  border-left:3px solid var(--volt-500);
  padding-left:1.1em;
  color:var(--silver-100);
}

.paper-zone{
  background:var(--paper-000);
  color:#1B2A24;
  border-radius:var(--radius-lg);
  padding:clamp(24px,4vw,56px);
}
.paper-zone h2,.paper-zone h3{color:var(--turf-800)}
.paper-zone .prose,.paper-zone p,.paper-zone li{color:#233830}
.paper-zone .prose a{color:var(--volt-600)}
.paper-zone .rule{background:rgba(5,16,11,.14)}

/* ---------- 图片容器（页面阶段放置图片） ---------- */
.figure{margin:0}

.media-frame{
  position:relative;
  display:block;
  overflow:hidden;
  aspect-ratio:16 / 10;
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  background:linear-gradient(148deg, var(--turf-800), var(--night-900) 78%);
}
.media-frame img{
  width:100%;
  height:100%;
  object-fit:cover;
}
.media-frame::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(200deg, rgba(52,217,139,.16), transparent 52%);
  pointer-events:none;
}
.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:10px;
  font-family:var(--font-mono);
  font-size:var(--fs-100);
  color:var(--silver-300);
}

/* ---------- 分段切换 ---------- */
.tabs{display:block}

.tab-list{
  display:flex;
  flex-wrap:wrap;
  gap:6px;
  width:fit-content;
  max-width:100%;
  padding:6px;
  border:1px solid var(--line);
  border-radius:var(--radius-pill);
  background:rgba(11,42,30,.62);
}

.tab{
  padding:9px 18px;
  border-radius:var(--radius-pill);
  color:var(--silver-300);
  font-size:var(--fs-200);
  font-weight:600;
  line-height:1.3;
  cursor:pointer;
  transition:background .2s var(--ease), color .2s var(--ease);
}
.tab:hover{color:var(--silver-100);background:rgba(52,217,139,.12)}
.tab[aria-selected="true"]{
  background:var(--neon-450);
  color:var(--night-900);
  font-weight:700;
}

.tab-panel{padding-top:clamp(20px,3vw,34px)}
.tab-panel[hidden]{display:none}

/* ---------- 显现 ---------- */
.js .reveal{
  opacity:0;
  transform:translateY(18px);
  transition:opacity .55s var(--ease), transform .55s var(--ease);
}
.js .reveal.is-visible{
  opacity:1;
  transform:none;
}

/* ---------- 滚动进度 ---------- */
.scroll-progress{
  position:fixed;
  top:0;
  left:0;
  z-index:120;
  width:100%;
  height:3px;
  transform:scaleX(0);
  transform-origin:0 50%;
  background:linear-gradient(90deg, var(--neon-450), var(--volt-500));
  pointer-events:none;
}

/* ---------- 跳转链接 ---------- */
.skip-link{
  position:fixed;
  top:-80px;
  left:50%;
  z-index:200;
  transform:translateX(-50%);
  padding:11px 22px;
  border-radius:0 0 var(--radius-md) var(--radius-md);
  background:var(--neon-450);
  color:var(--night-900);
  font-size:var(--fs-200);
  font-weight:700;
  transition:top .22s var(--ease);
}
.skip-link:focus{top:0}

/* ---------- 头部 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  padding:14px var(--gutter);
  transition:padding .26s var(--ease);
}
.site-header.is-condensed{padding-block:8px}

.header-inner{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
}

.nav-island{
  position:relative;
  display:flex;
  align-items:center;
  gap:clamp(10px,1.8vw,24px);
  width:100%;
  padding:8px 10px 8px 18px;
  border:1px solid var(--line);
  border-radius:var(--radius-pill);
  background:rgba(11,42,30,.64);
  backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  transition:background .26s var(--ease), box-shadow .26s var(--ease),
             padding .26s var(--ease);
}
.site-header.is-condensed .nav-island{
  padding:6px 8px 6px 16px;
  background:rgba(5,16,11,.88);
  box-shadow:var(--shadow-island);
}

.brand{
  display:flex;
  align-items:baseline;
  gap:10px;
  flex:0 0 auto;
}
.brand-mark{
  position:relative;
  font-size:1.0625rem;
  font-weight:900;
  letter-spacing:.02em;
  color:var(--silver-100);
  padding-right:12px;
}
.brand-mark::after{
  content:"";
  position:absolute;
  right:0;
  bottom:5px;
  width:6px;
  height:6px;
  border-radius:50%;
  background:var(--volt-500);
}
.brand-tag{
  font-family:var(--font-mono);
  font-size:var(--fs-100);
  letter-spacing:.1em;
  color:var(--silver-300);
  white-space:nowrap;
}

.nav-links{
  display:flex;
  align-items:center;
  gap:clamp(2px,1vw,8px);
  margin:0 auto;
}

.nav-link{
  display:inline-block;
  padding:8px 14px;
  border-radius:var(--radius-pill);
  color:var(--silver-100);
  font-size:var(--fs-200);
  font-weight:500;
  white-space:nowrap;
  transition:background .18s var(--ease), color .18s var(--ease),
             box-shadow .18s var(--ease);
}
.nav-link:hover{
  background:rgba(52,217,139,.14);
  color:var(--neon-450);
}
.nav-link[aria-current="page"]{
  background:rgba(52,217,139,.16);
  color:var(--neon-450);
  box-shadow:inset 0 0 0 1px rgba(52,217,139,.42);
}

.nav-cta{flex:0 0 auto}

.nav-toggle{
  display:none;
  flex:0 0 auto;
  width:44px;
  height:44px;
  border:1px solid var(--line);
  border-radius:var(--radius-pill);
  background:rgba(52,217,139,.1);
  color:var(--silver-100);
  cursor:pointer;
  transition:background .2s var(--ease), border-color .2s var(--ease);
}
.nav-toggle:hover{background:rgba(52,217,139,.22);border-color:rgba(52,217,139,.5)}
.nav-toggle span{
  display:block;
  width:18px;
  height:2px;
  margin:0 auto;
  border-radius:2px;
  background:currentColor;
  transition:transform .22s var(--ease), opacity .22s var(--ease);
}
.nav-toggle span + span{margin-top:4px}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(56px,8vw,116px);
  padding-top:clamp(44px,6.5vw,84px);
  background:linear-gradient(180deg, rgba(11,42,30,.5), var(--turf-800));
  color:var(--silver-300);
}

.footer-stripe{
  position:absolute;
  top:0;
  left:0;
  width:100%;
  height:4px;
  background:linear-gradient(90deg, var(--neon-450), var(--volt-500) 52%, var(--neon-450));
  opacity:.9;
}

.footer-inner{
  display:grid;
  grid-template-columns:minmax(230px,1.1fr) minmax(0,2fr);
  gap:clamp(28px,4.5vw,60px);
}

.footer-lede{display:grid;gap:12px;align-content:start;justify-items:start}

.footer-brand-mark{
  font-size:clamp(1.9rem,3.6vw,2.9rem);
  font-weight:900;
  line-height:1;
  letter-spacing:-.03em;
  color:var(--silver-100);
}
.footer-tagline{
  font-size:var(--fs-200);
  color:var(--silver-300);
  max-width:22em;
}

.footer-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:clamp(20px,3vw,36px);
}

.footer-col{display:grid;gap:12px;align-content:start}

.footer-col-title{
  margin:0;
  font-family:var(--font-mono);
  font-size:var(--fs-100);
  font-weight:600;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--neon-450);
}

.footer-links{display:grid;gap:9px}

.footer-links a{
  display:inline-block;
  font-size:var(--fs-200);
  color:var(--silver-300);
  transition:color .18s var(--ease), transform .18s var(--ease);
}
.footer-links a:hover{color:var(--silver-100);transform:translateX(3px)}
.footer-links a[aria-current="page"]{color:var(--neon-450)}

.footer-contact{
  display:flex;
  flex-wrap:wrap;
  gap:14px clamp(20px,4vw,52px);
  margin-top:clamp(30px,4.5vw,54px);
  padding-top:22px;
  border-top:1px dashed var(--line-strong);
}
.footer-contact-item{display:grid;gap:3px}
.footer-contact-label{
  font-family:var(--font-mono);
  font-size:var(--fs-100);
  letter-spacing:.14em;
  text-transform:uppercase;
  color:rgba(185,199,192,.7);
}
.footer-contact-value{
  font-size:var(--fs-200);
  color:var(--silver-100);
}

.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  gap:8px 24px;
  justify-content:space-between;
  margin-top:clamp(26px,4vw,46px);
  padding:18px 0 30px;
  border-top:1px solid rgba(185,199,192,.14);
  font-family:var(--font-mono);
  font-size:var(--fs-100);
  color:rgba(185,199,192,.72);
}

/* ---------- 响应式：平板 ---------- */
@media (max-width:1024px){
  .footer-inner{grid-template-columns:1fr}
  .grid-12{gap:20px}
}

/* ---------- 响应式：移动导航 ---------- */
@media (max-width:940px){
  .site-header{padding:10px var(--gutter)}
  .nav-island{padding:7px 8px 7px 16px;gap:10px}

  .brand-tag{display:none}

  .nav-toggle{display:flex;flex-direction:column;align-items:center;justify-content:center}

  .nav-links{
    position:absolute;
    top:calc(100% + 12px);
    left:0;
    right:0;
    display:none;
    flex-direction:column;
    align-items:stretch;
    gap:4px;
    margin:0;
    padding:12px;
    max-height:min(68vh,520px);
    overflow-y:auto;
    border:1px solid var(--line);
    border-radius:var(--radius-lg);
    background:rgba(5,16,11,.97);
    box-shadow:var(--shadow-island);
  }
  .nav-links[data-open]{display:flex}

  .nav-link{
    padding:12px 16px;
    border-radius:var(--radius-md);
    font-size:var(--fs-300);
  }

  .grid-12{grid-template-columns:repeat(6,minmax(0,1fr))}

  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}

/* ---------- 响应式：手机 ---------- */
@media (max-width:560px){
  .nav-cta{display:none}

  .display-title{font-size:clamp(2rem,10vw,2.9rem)}

  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;align-items:flex-start}

  .tab-list{
    width:100%;
    justify-content:flex-start;
    border-radius:var(--radius-md);
  }
  .tab{flex:1 1 auto;text-align:center;padding:9px 12px}

  .paper-zone{border-radius:var(--radius-md)}
}

/* ---------- 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;
  }
  .js .reveal{opacity:1 !important;transform:none !important}
  .btn:hover{transform:none}
  .data-card:hover{transform:none}
  .footer-links a:hover{transform:none}
}