/* ==========================================================================
   三亿体育主站 · 共享样式 /assets/site.css · V3.1
   深墨绿底 / 荧光青强调 / 琥珀橙数据高亮 / 极细描边 / 非对称编辑部节奏
   ========================================================================== */

:root{
  --bg-900:#06120F;
  --bg-800:#0B1F1A;
  --bg-700:#123027;
  --line:#1E3A32;
  --mint:#2EF2C8;
  --cyan:#39D9FF;
  --amber:#FFB547;
  --gold:#FFD77A;
  --graphite:#2A3B36;
  --ink:#E8F2EE;
  --ink-soft:#8FA8A0;

  --shadow-1:0 1px 0 rgba(0,0,0,.45), 0 26px 50px -34px rgba(0,0,0,.95);
  --glow:radial-gradient(130% 100% at 50% 0%, rgba(46,242,200,.10), transparent 62%);

  --shell:1280px;
  --pad:20px;
  --radius:2px;
  --ease:cubic-bezier(.22,.61,.36,1);

  --font-display:"Bebas Neue","Oswald","Archivo","Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --font-head:"Noto Sans SC Narrow","Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --font-serif:"Noto Serif SC","Songti SC","SimSun",serif;
  --font-body:"Inter","Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
}

@media (min-width:768px){ :root{ --pad:40px; } }
@media (min-width:1200px){ :root{ --pad:64px; } }

/* ---------- reset ---------- */
*,*::before,*::after{ box-sizing:border-box; }
html{ -webkit-text-size-adjust:100%; scroll-behavior:smooth; scroll-padding-top:88px; }
body{
  margin:0;
  min-height:100vh;
  background-color:var(--bg-900);
  background-image:
    radial-gradient(70% 60% at 88% 0%, rgba(57,217,255,.07), transparent 60%),
    radial-gradient(60% 50% at 0% 22%, rgba(46,242,200,.06), transparent 62%);
  background-repeat:no-repeat;
  color:var(--ink);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4,h5,h6{ margin:0; font-family:var(--font-head); font-weight:900; line-height:1.02; letter-spacing:-.01em; }
p{ margin:0; }
ul,ol{ margin:0; padding:0; }
img,svg,video{ max-width:100%; }
a{ color:var(--mint); text-decoration:none; }
a:hover{ text-decoration:none; }
button{ font:inherit; color:inherit; }
table{ border-collapse:collapse; }
::selection{ background:rgba(46,242,200,.28); color:#04140F; }

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

@media (max-width:1023px){
  #main-content{ padding-top:66px; }
}

/* ---------- 基础排版与工具 ---------- */
.shell{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding-inline:var(--pad);
}
.section{ padding-block:clamp(44px,6vw,88px); }
.section__head{ display:grid; gap:14px; margin-bottom:clamp(24px,3.4vw,44px); }
.section__title{ font-size:clamp(26px,4vw,44px); }
.section__lede{ font-family:var(--font-serif); font-size:16.5px; line-height:1.85; color:var(--ink-soft); max-width:34em; }
.eyebrow{
  display:inline-flex; align-items:center; gap:10px;
  font-family:var(--font-body); font-size:11px; font-weight:700;
  letter-spacing:.2em; text-transform:uppercase; color:var(--mint);
}
.eyebrow::before{ content:""; width:24px; height:1px; background:currentColor; }
.lede{ font-family:var(--font-serif); font-size:17px; line-height:1.85; color:var(--ink-soft); max-width:34em; }
.prose{ max-width:36em; font-size:16.5px; line-height:1.8; color:var(--ink); }
.prose p{ margin-bottom:1.1em; }
.prose p:last-child{ margin-bottom:0; }
.prose strong{ color:var(--mint); font-weight:700; }
.rule{ height:1px; border:0; margin:0; background:var(--line); }

/* ---------- 网格 ---------- */
.grid{ display:grid; gap:20px; }
.grid--2{ grid-template-columns:1fr; }
.grid--3{ grid-template-columns:1fr; }
@media (min-width:720px){
  .grid--2{ grid-template-columns:repeat(2,minmax(0,1fr)); }
  .grid--3{ grid-template-columns:repeat(2,minmax(0,1fr)); }
}
@media (min-width:1024px){
  .grid--3{ grid-template-columns:repeat(3,minmax(0,1fr)); }
}

/* ---------- 跳过导航 ---------- */
.skip-link{
  position:fixed; top:8px; left:8px; z-index:200;
  transform:translateY(-180%);
  background:var(--mint); color:#04140F;
  font-size:14px; font-weight:700;
  padding:10px 16px; border-radius:var(--radius);
  transition:transform .18s var(--ease);
}
.skip-link:focus{ transform:translateY(0); }

/* ---------- 头部：移动端顶部实色条 ---------- */
.site-header{
  position:fixed; top:0; left:0; right:0; z-index:90;
  background:rgba(6,18,15,.80);
  border-bottom:1px solid var(--line);
  -webkit-backdrop-filter:blur(14px); backdrop-filter:blur(14px);
}
.hdr__bar{
  position:relative;
  display:flex; align-items:center; gap:10px;
  width:100%; max-width:var(--shell);
  margin-inline:auto;
  padding:10px var(--pad);
}
.hdr__brand{
  display:inline-flex; align-items:center; gap:10px;
  color:var(--ink); text-decoration:none; flex:0 0 auto;
}
.hdr__brand-mark{
  display:grid; place-items:center;
  width:28px; height:28px;
  border:1px solid var(--mint); border-radius:var(--radius);
  font-family:var(--font-display); font-size:14px; line-height:1;
  letter-spacing:.04em; color:var(--mint);
}
.hdr__brand-line{ display:grid; line-height:1.15; }
.hdr__brand-name{ font-size:15px; font-weight:900; letter-spacing:.02em; color:var(--ink); white-space:nowrap; }
.hdr__brand-sub{ font-size:10.5px; letter-spacing:.16em; color:var(--ink-soft); white-space:nowrap; }
.hdr__version{
  flex:0 0 auto;
  font-size:11px; font-weight:700; letter-spacing:.14em;
  color:var(--amber); border:1px solid rgba(255,181,71,.32);
  border-radius:999px; padding:2px 8px; white-space:nowrap;
}
.hdr__nav{
  display:none;
  position:absolute; top:100%; left:0; right:0;
  background:rgba(6,18,15,.98);
  border-bottom:1px solid var(--line);
  padding:6px var(--pad) 18px;
  -webkit-backdrop-filter:blur(14px); backdrop-filter:blur(14px);
}
.hdr__nav[data-open="true"]{ display:block; }
.hdr__nav-list{ display:flex; flex-direction:column; list-style:none; }
.hdr__nav-item{ display:block; }
.hdr__nav-link{
  display:block;
  padding:13px 4px;
  font-size:16px; color:var(--ink);
  border-bottom:1px solid var(--line);
  transition:color .12s var(--ease), background-color .12s var(--ease);
}
.hdr__nav-link:hover{ color:var(--mint); }
.hdr__nav-link[aria-current="page"]{
  color:var(--mint);
  background:rgba(46,242,200,.09);
  box-shadow:inset 0 -2px 0 0 var(--mint);
}
.hdr__cta{ display:none; }
.hdr__toggle{
  display:inline-flex; flex-direction:column; align-items:center; justify-content:center; gap:4px;
  margin-left:auto;
  width:46px; height:38px;
  background:transparent;
  border:1px solid var(--line); border-radius:999px;
  cursor:pointer;
  transition:border-color .12s var(--ease), background-color .12s var(--ease);
}
.hdr__toggle:hover{ border-color:var(--mint); }
.hdr__toggle-bar{
  display:block; width:16px; height:1.5px; background:var(--ink);
  transition:transform .24s var(--ease), opacity .18s var(--ease);
}
.hdr__toggle-text{
  position:absolute; width:1px; height:1px; overflow:hidden;
  clip:rect(0 0 0 0); white-space:nowrap;
}
.hdr__toggle[aria-expanded="true"] .hdr__toggle-bar:nth-child(1){ transform:translateY(5.5px) rotate(45deg); }
.hdr__toggle[aria-expanded="true"] .hdr__toggle-bar:nth-child(2){ opacity:0; }
.hdr__toggle[aria-expanded="true"] .hdr__toggle-bar:nth-child(3){ transform:translateY(-5.5px) rotate(-45deg); }
.hdr__progress{
  position:absolute; left:0; right:0; bottom:-1px; height:2px;
  background:linear-gradient(90deg,var(--mint),var(--cyan));
  transform:scaleX(0); transform-origin:0 50%;
  will-change:transform;
}

/* ---------- 头部：桌面端悬浮数据条 → 顶部吸附 ---------- */
@media (min-width:1024px){
  .site-header{
    top:auto; bottom:24px; left:50%; right:auto;
    width:max-content; max-width:calc(100% - 48px);
    transform:translateX(-50%);
    background:transparent; border-bottom:0;
    -webkit-backdrop-filter:none; backdrop-filter:none;
    transition:bottom .28s var(--ease), background-color .24s var(--ease), border-color .24s var(--ease);
  }
  .hdr__bar{
    width:auto; max-width:none; margin:0; gap:6px;
    padding:8px 8px 8px 18px;
    background:rgba(11,31,26,.62);
    border:1px solid var(--line);
    border-radius:999px;
    -webkit-backdrop-filter:blur(18px); backdrop-filter:blur(18px);
    box-shadow:0 30px 70px -46px rgba(0,0,0,1);
    transition:border-radius .24s var(--ease), background-color .24s var(--ease),
               border-color .24s var(--ease), padding .24s var(--ease);
  }
  .hdr__nav{
    display:flex; position:static; margin-inline:auto;
    background:none; border:0; padding:0;
    -webkit-backdrop-filter:none; backdrop-filter:none;
  }
  .hdr__nav-list{ flex-direction:row; align-items:center; gap:2px; }
  .hdr__nav-link{
    padding:8px 12px; font-size:14px; border-bottom:0;
    border-radius:999px;
  }
  .hdr__nav-link[aria-current="page"]{ box-shadow:inset 0 -2px 0 0 var(--mint); }
  .hdr__cta{
    display:inline-flex; align-items:center;
    padding:9px 16px; border-radius:999px;
    background:var(--mint); color:#04140F;
    font-size:13px; font-weight:700; white-space:nowrap;
    transition:background-color .12s var(--ease);
  }
  .hdr__cta:hover{ background:#5CF7D5; }
  .hdr__toggle{ display:none; }
  .site-header[data-docked="true"]{
    top:0; bottom:auto; left:0; right:0;
    width:100%; max-width:none;
    transform:none;
    background:rgba(6,18,15,.94);
    border-bottom:1px solid var(--line);
    -webkit-backdrop-filter:blur(16px); backdrop-filter:blur(16px);
  }
  .site-header[data-docked="true"] .hdr__bar{
    max-width:var(--shell); margin-inline:auto;
    padding:10px var(--pad);
    background:transparent; border-color:transparent; border-radius:0;
    box-shadow:none;
  }
}
@media (max-width:359px){
  .hdr__brand-sub{ display:none; }
}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(64px,9vw,120px);
  border-top:1px solid var(--line);
  background-image:
    radial-gradient(90% 120% at 10% 0%, rgba(46,242,200,.07), transparent 60%),
    linear-gradient(180deg, var(--bg-800), var(--bg-900));
  color:var(--ink-soft);
}
.ftr__inner{
  width:100%; max-width:var(--shell); margin-inline:auto;
  padding:clamp(40px,5vw,64px) var(--pad) 28px;
}
.ftr__top{ display:grid; gap:36px; grid-template-columns:1fr; }
@media (min-width:760px){
  .ftr__top{ grid-template-columns:repeat(2,minmax(0,1fr)); gap:40px; }
  .ftr__brand{ grid-column:1 / -1; }
}
@media (min-width:1080px){
  .ftr__top{ grid-template-columns:1.6fr repeat(3,minmax(0,1fr)); gap:48px; }
  .ftr__brand{ grid-column:auto; }
}
.ftr__brand-name{
  margin:0 0 12px;
  font-family:var(--font-head); font-size:22px; font-weight:900;
  letter-spacing:-.01em; color:var(--ink);
}
.ftr__brand-meta{ display:flex; flex-wrap:wrap; align-items:center; gap:10px; margin:0; }
.ftr__badge{
  font-size:11px; font-weight:700; letter-spacing:.14em;
  color:var(--amber); border:1px solid rgba(255,181,71,.32);
  border-radius:999px; padding:2px 9px;
}
.ftr__tag{
  font-size:11px; letter-spacing:.16em;
  color:var(--mint); border:1px solid rgba(46,242,200,.28);
  border-radius:999px; padding:3px 10px;
}
.ftr__closing{
  margin:18px 0 0; max-width:26em;
  font-family:var(--font-serif); font-size:14px; line-height:1.9;
  color:var(--ink-soft);
}
.ftr__col-title{
  margin:0 0 14px; padding-bottom:10px;
  font-family:var(--font-body); font-size:11px; font-weight:700;
  letter-spacing:.18em; text-transform:uppercase; color:var(--ink-soft);
  border-bottom:1px solid var(--line);
}
.ftr__links{ list-style:none; display:grid; gap:10px; }
.ftr__link{
  display:inline-flex; align-items:center; gap:8px;
  font-size:15px; color:var(--ink);
  transition:color .12s var(--ease);
}
.ftr__link::before{
  content:""; width:12px; height:1px; background:var(--line);
  transition:width .18s var(--ease), background-color .18s var(--ease);
}
.ftr__link:hover{ color:var(--mint); }
.ftr__link:hover::before{ width:20px; background:var(--mint); }
.ftr__contact{
  margin-top:clamp(32px,4vw,48px); padding-top:24px;
  border-top:1px solid var(--line);
  display:flex; flex-wrap:wrap; gap:10px 28px;
  font-size:14px;
}
.ftr__contact-item{ display:inline-flex; align-items:baseline; gap:8px; }
.ftr__contact-key{ font-size:11px; letter-spacing:.14em; color:var(--mint); }
.ftr__contact-val{ color:var(--ink); }
.ftr__bottom{
  margin-top:26px; padding-top:18px;
  border-top:1px solid var(--line);
  display:flex; flex-wrap:wrap; justify-content:space-between; gap:8px 24px;
  font-size:12.5px; color:var(--ink-soft);
}
.ftr__legal,.ftr__copy{ margin:0; }

/* ---------- 面板 / 数据 / 标签 ---------- */
.panel{
  position:relative;
  padding:22px 22px 24px;
  background:var(--bg-800);
  border:1px solid var(--line);
  border-radius:var(--radius);
  box-shadow:var(--shadow-1);
}
.panel--glow::before{
  content:""; position:absolute; inset:0;
  background:var(--glow); pointer-events:none;
}
.panel--amber{ border-color:rgba(255,181,71,.32); }

.stat{ display:block; }
.stat__num{
  display:block;
  font-family:var(--font-display); font-weight:700;
  font-size:clamp(44px,7vw,96px); line-height:.9;
  letter-spacing:-.02em; color:var(--ink);
  font-variant-numeric:tabular-nums; font-feature-settings:"tnum" 1;
}
.stat__num--mint{ color:var(--mint); }
.stat__num--amber{ color:var(--amber); }
.stat__label{
  display:block; margin-top:10px;
  font-size:12px; letter-spacing:.16em; color:var(--ink-soft);
}
.tag{
  display:inline-flex; align-items:center; gap:6px;
  padding:3px 10px;
  font-size:11px; letter-spacing:.14em; text-transform:uppercase;
  color:var(--ink-soft);
  border:1px solid var(--line); border-radius:999px;
}
.tag--mint{ color:var(--mint); border-color:rgba(46,242,200,.32); }
.tag--cyan{ color:var(--cyan); border-color:rgba(57,217,255,.32); }
.tag--amber{ color:var(--amber); border-color:rgba(255,181,71,.35); }

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex; align-items:center; gap:8px;
  padding:11px 20px;
  font-size:14px; font-weight:700; letter-spacing:.02em;
  color:var(--ink);
  background:transparent;
  border:1px solid var(--line); border-radius:var(--radius);
  cursor:pointer;
  transition:background-color .12s var(--ease), border-color .12s var(--ease),
             color .12s var(--ease), transform .12s var(--ease);
}
.btn:hover{ transform:translateY(-1px); }
.btn--primary{ background:var(--mint); border-color:var(--mint); color:#04140F; }
.btn--primary:hover{ background:#5CF7D5; }
.btn--ghost:hover{ border-color:var(--mint); color:var(--mint); }
.btn--amber{ background:var(--amber); border-color:var(--amber); color:#1A1204; }

/* ---------- 面包屑 ---------- */
.crumbs{ font-size:13px; color:var(--ink-soft); }
.crumbs__list{ display:flex; flex-wrap:wrap; gap:8px; list-style:none; }
.crumbs__item{ display:inline-flex; align-items:center; gap:8px; }
.crumbs__link{ color:var(--ink-soft); }
.crumbs__link:hover{ color:var(--mint); }
.crumbs__sep{ color:var(--line); }
.crumbs__current{ color:var(--ink); }

/* ---------- 图片容器 ---------- */
.media-frame{
  position:relative; display:block; overflow:hidden;
  margin:0;
  background:linear-gradient(160deg, var(--bg-700), var(--bg-900));
  border:1px solid var(--line); border-radius:var(--radius);
}
.media-frame::after{
  content:""; position:absolute; inset:0; pointer-events:none;
  background:radial-gradient(80% 90% at 72% 0%, rgba(57,217,255,.10), transparent 62%);
}
.media-frame__img{
  display:block; width:100%; height:100%;
  object-fit:cover;
  filter:saturate(.72) contrast(1.06);
}
.media-frame--wide{ aspect-ratio:16 / 9; }
.media-frame--tall{ aspect-ratio:3 / 4; }
.media-frame--square{ aspect-ratio:1 / 1; }
.media-frame--band{ aspect-ratio:21 / 9; }
.media-frame__caption{
  margin-top:10px;
  font-family:var(--font-serif); font-size:13px; line-height:1.7;
  color:var(--ink-soft);
}
@media (max-width:640px){
  .media-frame--tall{ aspect-ratio:4 / 5; }
}

/* ---------- 横向数据带 ---------- */
.rail{
  position:relative;
  border-block:1px solid var(--line);
  background:var(--bg-800);
}
.rail__viewport{ overflow-x:auto; overscroll-behavior-x:contain; }
.rail__track{ display:flex; min-width:max-content; }
.rail__item{
  flex:0 0 auto; min-width:220px;
  padding:18px 24px;
  border-right:1px solid var(--line);
}
.rail--auto .rail__track{ animation:rail-marquee 30s linear infinite; }
.rail--auto:hover .rail__track,
.rail--auto:focus-within .rail__track{ animation-play-state:paused; }
@keyframes rail-marquee{
  from{ transform:translate3d(0,0,0); }
  to{ transform:translate3d(-50%,0,0); }
}

/* ---------- 章节索引 ---------- */
.toc{ font-size:14px; }
@media (min-width:1024px){ .toc{ position:sticky; top:96px; } }
.toc__list{
  list-style:none;
  display:grid; gap:2px;
  border-left:1px solid var(--line);
}
.toc__link{
  display:block;
  margin-left:-1px;
  padding:7px 0 7px 16px;
  color:var(--ink-soft);
  border-left:2px solid transparent;
  transition:color .12s var(--ease), border-color .12s var(--ease), padding-left .18s var(--ease);
}
.toc__link:hover{ color:var(--ink); padding-left:20px; }
.toc__link[aria-current="true"]{ color:var(--mint); border-left-color:var(--mint); }

/* ---------- 返回顶部 ---------- */
.to-top{
  position:fixed; right:20px; bottom:20px; z-index:80;
  display:none; place-items:center;
  width:44px; height:44px;
  background:rgba(11,31,26,.92);
  color:var(--mint);
  border:1px solid var(--line); border-radius:999px;
  font-size:16px; line-height:1; cursor:pointer;
  -webkit-backdrop-filter:blur(10px); backdrop-filter:blur(10px);
  transition:border-color .12s var(--ease), transform .18s var(--ease);
}
.to-top.is-on{ display:grid; }
.to-top:hover{ border-color:var(--mint); transform:translateY(-2px); }
@media (min-width:1024px){
  .to-top{ right:32px; bottom:96px; }
}

/* ---------- 显现 ---------- */
html[data-reveal-ready] [data-reveal]{
  opacity:0;
  transform:translateY(14px);
  transition:opacity .5s var(--ease), transform .5s var(--ease);
}
html[data-reveal-ready] [data-reveal].is-in{
  opacity:1;
  transform:none;
}

/* ---------- 响应式与动效偏好 ---------- */
@media (prefers-reduced-motion:reduce){
  html{ scroll-behavior:auto; }
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .rail--auto .rail__track{ animation:none; }
  html[data-reveal-ready] [data-reveal]{ opacity:1; transform:none; }
  .btn:hover,.to-top:hover{ transform:none; }
}