/* =============================================================
   新2投注指南 · 全站共享样式 /assets/site.css
   基色：void-000 / ink-800 / line-600    高亮：cyan-400 / amber-400
   ============================================================= */

/* ---------- 1. 变量 ---------- */
:root{
  --void-000:#05070B;
  --ink-800:#0B1017;
  --line-600:#1B2430;
  --paper-000:#F2F5F7;
  --paper-400:#A9B4BE;
  --slate-500:#6E7C88;
  --cyan-400:#3BE0D1;
  --cyan-700:#12635F;
  --amber-400:#FFB43A;
  --amber-700:#7A4E12;

  --font-sans:"Source Han Sans SC","Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"IBM Plex Mono","JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --gutter:clamp(20px,7vw,110px);
  --maxw:1240px;
  --radius-pill:999px;
  --radius-lg:28px;
  --radius-md:18px;
  --header-h:104px;

  --ease:cubic-bezier(.22,.61,.36,1);
}

/* ---------- 2. Reset ---------- */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--void-000);
  color:var(--paper-000);
  font-family:var(--font-sans);
  font-size:17px;
  line-height:1.75;
  font-weight:400;
  letter-spacing:0;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img,svg,video{max-width:100%;display:block;}
ul,ol{margin:0;padding:0;list-style:none;}
button{font:inherit;}
a{color:inherit;text-decoration:none;}
time{font-variant-numeric:tabular-nums;}

:focus-visible{
  outline:2px solid var(--cyan-400);
  outline-offset:3px;
  border-radius:4px;
}
#main-content:focus-visible{outline-offset:-2px;}

/* ---------- 3. 中文排版与标题 ---------- */
h1,h2,h3,h4{
  margin:0 0 .6em;
  color:var(--paper-000);
  font-weight:800;
  letter-spacing:-.02em;
  line-height:1.15;
}
h1{font-size:clamp(2.5rem,6.4vw,5.5rem);font-weight:900;}
h2{font-size:clamp(1.75rem,3.4vw,2.5rem);}
h3{font-size:clamp(1.15rem,1.7vw,1.75rem);line-height:1.3;}
h4{font-size:1.05rem;line-height:1.4;}
p{margin:0 0 1.1em;}
.mono{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  letter-spacing:.04em;
}
.index{
  display:inline-block;
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.1em;
  color:var(--cyan-400);
}
.eyebrow{
  display:inline-block;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--slate-500);
}
.lede{
  max-width:58ch;
  font-size:clamp(1.0625rem,1.35vw,1.25rem);
  line-height:1.7;
  color:var(--paper-400);
}
.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;
}

/* ---------- 4. 布局：容器 / 网格 / 章节 ---------- */
.wrap{
  width:100%;
  max-width:var(--maxw);
  margin:0 auto;
  padding:0 var(--gutter);
}
.wrap--narrow{max-width:820px;}

.section{
  position:relative;
  padding:clamp(56px,8vw,116px) 0;
}
.section--band{
  background:var(--ink-800);
  border-top:1px solid var(--line-600);
  border-bottom:1px solid var(--line-600);
}
.page-top{padding-top:calc(var(--header-h) + clamp(24px,4vw,56px));}

.section-head{
  display:flex;
  align-items:baseline;
  gap:18px;
  flex-wrap:wrap;
  padding-top:16px;
  margin-bottom:clamp(24px,3vw,44px);
  border-top:1px solid var(--line-600);
}
.section-head__aside{margin-left:auto;}

.grid{
  display:grid;
  grid-template-columns:repeat(12,minmax(0,1fr));
  gap:24px;
}
.col-3{grid-column:span 3;}
.col-4{grid-column:span 4;}
.col-6{grid-column:span 6;}
.col-8{grid-column:span 8;}
.col-9{grid-column:span 9;}
.col-12{grid-column:span 12;}

/* ---------- 5. 正文与内联链接 ---------- */
.prose{max-width:68ch;}
.prose p{margin:0 0 1.2em;color:var(--paper-400);}
.prose ul,.prose ol{margin:0 0 1.2em 1.2em;color:var(--paper-400);}
.prose li{margin-bottom:.5em;}
.prose li::marker{color:var(--cyan-400);}
.prose strong{color:var(--paper-000);font-weight:600;}
.prose a,.link-inline{
  color:var(--cyan-400);
  text-decoration:underline;
  text-decoration-thickness:1px;
  text-underline-offset:4px;
  text-decoration-color:var(--cyan-700);
}
.prose a:hover,.link-inline:hover{text-decoration-color:var(--cyan-400);}

/* ---------- 6. 按钮 / 标签 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  min-height:48px;
  padding:0 22px;
  border:1px solid var(--line-600);
  border-radius:var(--radius-pill);
  background:transparent;
  color:var(--paper-000);
  font-family:var(--font-sans);
  font-size:15px;
  font-weight:500;
  line-height:1;
  cursor:pointer;
  transition:background-color .18s var(--ease),border-color .18s var(--ease),color .18s var(--ease);
}
.btn:hover{border-color:var(--cyan-700);color:var(--cyan-400);}
.btn--primary{
  background:var(--cyan-700);
  border-color:var(--cyan-700);
  color:#EAFBF8;
}
.btn--primary:hover{background:var(--cyan-400);border-color:var(--cyan-400);color:#04211F;}
.btn--amber{border-color:var(--amber-700);color:var(--amber-400);}
.btn--amber:hover{background:var(--amber-700);border-color:var(--amber-700);color:#FFF3DE;}

.chip{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:4px 12px;
  border:1px solid var(--line-600);
  border-radius:var(--radius-pill);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.04em;
  color:var(--paper-400);
}
.chip--cyan{border-color:var(--cyan-700);background:rgba(18,99,95,.16);color:var(--cyan-400);}
.chip--amber{border-color:var(--amber-700);background:rgba(122,78,18,.16);color:var(--amber-400);}

/* ---------- 7. 折叠面板 ---------- */
.fold{
  border-bottom:1px solid var(--line-600);
}
.fold > summary{
  display:flex;
  align-items:center;
  gap:16px;
  padding:20px 0;
  cursor:pointer;
  list-style:none;
  color:var(--paper-000);
  font-weight:500;
  transition:color .18s var(--ease);
}
.fold > summary::-webkit-details-marker{display:none;}
.fold > summary:hover{color:var(--cyan-400);}
.fold > summary::after{
  content:"+";
  margin-left:auto;
  font-family:var(--font-mono);
  font-size:18px;
  line-height:1;
  color:var(--cyan-400);
}
.fold[open] > summary::after{content:"–";}
.fold__body{
  padding:0 0 24px;
  max-width:70ch;
  color:var(--paper-400);
  animation:foldIn .18s var(--ease) both;
}
@keyframes foldIn{from{opacity:0;transform:translateY(-4px);}to{opacity:1;transform:none;}}

/* ---------- 8. 图片容器（页面阶段放 <img>） ---------- */
.figure{margin:0;}
.figure__media{
  position:relative;
  aspect-ratio:16/9;
  overflow:hidden;
  border:1px solid var(--line-600);
  border-radius:var(--radius-lg);
  background-color:var(--ink-800);
  background-image:
    radial-gradient(circle at 72% 18%,rgba(59,224,209,.10),transparent 46%),
    radial-gradient(circle at 12% 82%,rgba(255,180,58,.07),transparent 44%);
}
.figure__media::after{
  content:"";
  position:absolute;
  inset:0;
  background-image:
    linear-gradient(var(--line-600) 1px,transparent 1px),
    linear-gradient(90deg,var(--line-600) 1px,transparent 1px);
  background-size:48px 48px;
  opacity:.45;
  pointer-events:none;
}
.figure__media img{
  position:relative;
  z-index:1;
  width:100%;
  height:100%;
  object-fit:cover;
}
.figure__media--wide{aspect-ratio:21/9;}
.figure__media--tall{aspect-ratio:4/5;}
.figure__caption{
  margin-top:12px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.04em;
  color:var(--slate-500);
}

/* ---------- 9. 面包屑 / 锚点 / 复制 ---------- */
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:0;
  margin:0 0 24px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.04em;
  color:var(--slate-500);
}
.breadcrumb li{display:inline-flex;align-items:center;}
.breadcrumb li:not(:last-child)::after{
  content:"/";
  margin:0 10px;
  color:var(--line-600);
}
.breadcrumb a:hover{color:var(--cyan-400);}

.anchors{
  position:sticky;
  top:calc(var(--header-h) + 16px);
}
.anchors__link{
  display:block;
  padding:6px 0;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--paper-400);
  transition:color .2s var(--ease);
}
.anchors__link:hover{color:var(--paper-000);}
.anchors__link.is-active,
.anchors__link[aria-current="true"]{color:var(--cyan-400);}

.copy-btn{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:6px 14px;
  border:1px solid var(--line-600);
  border-radius:var(--radius-pill);
  background:transparent;
  color:var(--paper-400);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.04em;
  cursor:pointer;
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.copy-btn:hover,.copy-btn.is-copied{border-color:var(--cyan-700);color:var(--cyan-400);}

/* ---------- 10. 滚动进度 / 显现 / 章节高亮 ---------- */
.scroll-progress{
  position:fixed;
  top:0;left:0;
  width:100%;height:2px;
  background:linear-gradient(90deg,var(--cyan-400),var(--amber-400));
  transform:scaleX(0);
  transform-origin:0 50%;
  z-index:70;
  pointer-events:none;
}
.js [data-reveal]{
  opacity:0;
  transform:translateY(16px);
  transition:opacity .5s var(--ease),transform .5s var(--ease);
}
.js [data-reveal].is-visible{opacity:1;transform:none;}
[data-section].is-active > .wrap > .section-head{border-top-color:var(--cyan-700);}

/* =============================================================
   11. 头部
   ============================================================= */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:50;
  padding:18px var(--gutter) 0;
  pointer-events:none;
  transition:padding-top .2s var(--ease);
}
.site-header.is-condensed{padding-top:8px;}

.header-bar{
  pointer-events:auto;
  position:relative;
  display:flex;
  align-items:center;
  gap:18px;
  max-width:var(--maxw);
  min-height:64px;
  margin:0 auto;
  padding:8px 14px 8px 22px;
  border:1px solid var(--line-600);
  border-radius:var(--radius-pill);
  background:rgba(11,16,23,.80);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  transition:background-color .2s var(--ease),border-color .2s var(--ease),min-height .2s var(--ease);
}
.site-header.is-condensed .header-bar{
  min-height:54px;
  background:rgba(5,7,11,.94);
  border-color:#243040;
}

.skip-link{
  position:absolute;
  left:var(--gutter);
  top:-90px;
  z-index:80;
  padding:10px 20px;
  border-radius:var(--radius-pill);
  background:var(--cyan-400);
  color:#04211F;
  font-size:14px;
  font-weight:600;
  transition:top .18s var(--ease);
}
.skip-link:focus{top:16px;}

.brand{
  display:flex;
  align-items:baseline;
  gap:10px;
  white-space:nowrap;
}
.brand__name{
  font-size:17px;
  font-weight:800;
  letter-spacing:-.01em;
  color:var(--paper-000);
}
.brand__code{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  color:var(--slate-500);
}
.brand:hover .brand__code{color:var(--cyan-400);}

.nav{
  position:absolute;
  left:50%;
  top:50%;
  transform:translate(-50%,-50%);
}
.nav__list{
  display:flex;
  align-items:center;
  gap:2px;
}
.nav__link{
  display:inline-block;
  padding:9px 14px;
  border-radius:var(--radius-pill);
  font-size:15px;
  color:var(--paper-400);
  white-space:nowrap;
  transition:color .18s var(--ease),background-color .18s var(--ease);
}
.nav__link:hover{color:var(--paper-000);background:rgba(242,245,247,.05);}
.nav__link[aria-current="page"]{
  color:var(--cyan-400);
  background:rgba(18,99,95,.22);
}

.header-status{
  display:flex;
  align-items:center;
  gap:10px;
  margin-left:auto;
}

.stamp{
  display:inline-flex;
  align-items:center;
  gap:8px;
  margin:0;
  padding:5px 13px;
  border:1px solid var(--amber-700);
  border-radius:var(--radius-pill);
  background:rgba(122,78,18,.18);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.04em;
  line-height:1.6;
  color:var(--amber-400);
  white-space:nowrap;
}
.stamp__dot{
  width:6px;height:6px;
  border-radius:50%;
  background:var(--amber-400);
  box-shadow:0 0 0 3px rgba(255,180,58,.14);
}
.stamp__label{color:var(--paper-400);}
.stamp.is-flash{animation:stampFlash .4s var(--ease);}
@keyframes stampFlash{
  0%,100%{background:rgba(122,78,18,.18);}
  50%{background:rgba(255,180,58,.34);}
}

.nav-toggle{
  display:none;
  align-items:center;
  gap:10px;
  padding:9px 16px;
  border:1px solid var(--line-600);
  border-radius:var(--radius-pill);
  background:transparent;
  color:var(--paper-000);
  font-size:14px;
  cursor:pointer;
  transition:border-color .18s var(--ease),color .18s var(--ease);
}
.nav-toggle:hover{border-color:var(--cyan-700);color:var(--cyan-400);}
.nav-toggle__label{font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;}
.nav-toggle__bars{position:relative;display:inline-block;width:16px;height:10px;}
.nav-toggle__bars i{
  position:absolute;left:0;
  width:16px;height:1.5px;
  border-radius:2px;
  background:currentColor;
  transition:transform .18s var(--ease);
}
.nav-toggle__bars i:first-child{top:0;}
.nav-toggle__bars i:last-child{bottom:0;}
.site-header[data-open] .nav-toggle__bars i:first-child{transform:translateY(4.25px) rotate(45deg);}
.site-header[data-open] .nav-toggle__bars i:last-child{transform:translateY(-4.25px) rotate(-45deg);}

/* =============================================================
   12. 页脚
   ============================================================= */
.site-footer{
  margin-top:clamp(56px,8vw,112px);
  padding:clamp(48px,6vw,80px) 0 32px;
  background:var(--ink-800);
  border-top:1px solid var(--line-600);
  font-size:15px;
  color:var(--paper-400);
}
.footer-top{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  gap:12px 24px;
  padding-bottom:26px;
  border-bottom:1px solid var(--line-600);
}
.footer-brand{
  margin:0;
  font-size:20px;
  font-weight:800;
  letter-spacing:-.01em;
  color:var(--paper-000);
}
.footer-brand__note{margin:0;max-width:44ch;font-size:14px;color:var(--paper-400);}
.footer-brand__domain{margin:0 0 0 auto;font-size:12px;color:var(--slate-500);}

.footer-grid{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:40px 32px;
  padding:44px 0 32px;
}
.footer-title{
  margin:0 0 16px;
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:500;
  letter-spacing:.12em;
  color:var(--slate-500);
}
.footer-list{display:flex;flex-direction:column;gap:10px;}
.footer-link{
  display:inline-block;
  font-size:15px;
  color:var(--paper-400);
  transition:color .18s var(--ease);
}
.footer-link:hover{color:var(--cyan-400);}

.footer-address{display:flex;flex-direction:column;gap:10px;font-style:normal;font-size:14px;line-height:1.7;}
.footer-address__line{color:var(--paper-400);}
.footer-address__meta{font-size:12px;color:var(--amber-400);}

.footer-note{margin:0 0 18px;font-size:14px;line-height:1.7;color:var(--paper-400);}

.footer-legal{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:12px 28px;
  padding-top:22px;
  border-top:1px solid var(--line-600);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.04em;
  color:var(--slate-500);
}
.footer-legal__item{margin:0;}
.footer-legal__links{display:flex;gap:20px;}
.footer-legal__links a:hover{color:var(--cyan-400);}

/* =============================================================
   13. 响应式
   ============================================================= */
@media (max-width:1100px){
  .nav__link{padding:9px 11px;font-size:14px;}
}

@media (max-width:960px){
  :root{--header-h:96px;}
  .site-header{padding:12px clamp(14px,4vw,32px) 0;}
  .site-header.is-condensed{padding-top:8px;}

  .header-bar{
    flex-wrap:wrap;
    gap:12px;
    border-radius:var(--radius-lg);
    padding:10px 12px;
  }
  .site-header.is-condensed .header-bar{border-radius:var(--radius-lg);}

  .brand{order:1;}
  .header-status{order:2;margin-left:auto;}

  .nav{
    order:3;
    position:absolute;
    left:0;
    right:0;
    top:calc(100% + 8px);
    display:none;
    transform:none;
    padding:10px;
    border:1px solid var(--line-600);
    border-radius:var(--radius-lg);
    background:rgba(5,7,11,.97);
    backdrop-filter:blur(12px);
    -webkit-backdrop-filter:blur(12px);
  }
  .site-header[data-open] .nav{display:block;}
  .nav__list{flex-direction:column;align-items:stretch;gap:2px;}
  .nav__link{
    display:block;
    padding:12px 14px;
    border-radius:14px;
    font-size:16px;
  }
  .nav-toggle{display:inline-flex;}

  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:34px 28px;}
  .footer-brand__domain{margin-left:0;}
}

@media (max-width:760px){
  body{font-size:16px;}
  .col-3,.col-4,.col-6,.col-8,.col-9{grid-column:span 12;}
  .section-head{flex-direction:column;gap:8px;}
  .section-head__aside{margin-left:0;}
  .anchors{position:static;top:auto;}
  .stamp__label{display:none;}
}

@media (max-width:560px){
  .footer-grid{grid-template-columns:minmax(0,1fr);}
  .footer-legal{flex-direction:column;align-items:flex-start;gap:10px;}
  .brand__code{display:none;}
  .nav-toggle__label{display:none;}
  .nav-toggle{padding:9px 12px;}
}

/* ---------- 14. 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;
  }
  .js [data-reveal]{opacity:1;transform:none;}
  .scroll-progress{transition:none;}
  .fold__body{animation:none;}
}