/* ==========================================================================
   乐投娱乐 · 全站共享样式  /assets/site.css
   只负责：reset / 变量 / 中文排版 / 页头 / 页脚 / 通用按钮 / 面包屑 /
   正文容器 / 网格 / 基础组件
   ========================================================================== */

/* ---------- 1. Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{
  -webkit-text-size-adjust:100%;
  text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:132px;
}
body,h1,h2,h3,h4,h5,p,ul,ol,li,figure,figcaption,blockquote,dl,dt,dd,fieldset{margin:0;padding:0}
ul,ol{list-style:none}
img,picture,svg,video{display:block;max-width:100%}
button,input,select,textarea{font:inherit;color:inherit}
button{background:none;border:0;cursor:pointer}
a{color:inherit;text-decoration:none}
table{border-collapse:collapse;border-spacing:0}
time,variant-numeric{font-variant-numeric:tabular-nums}

/* ---------- 2. 设计变量 ---------- */
:root{
  /* 色彩体系 */
  --ink-900:#0A1622;
  --ink-700:#132639;
  --ink-500:#1E3A52;
  --cream-100:#F4E9D7;
  --cream-300:#DFCDB0;
  --cyan-400:#2FE3D0;
  --amber-400:#F2B23E;
  --redorange-500:#E2542C;
  --darkred-600:#B3283C;
  --graypurple-500:#7A6BA8;
  --offwhite-050:#F6F2E9;
  --grayblue-400:#9AAAB9;
  --inktext-900:#12181F;

  /* 字体 */
  --font-display:'Archivo Narrow','Oswald','Noto Sans SC',Impact,sans-serif;
  --font-body:'Noto Sans SC','Inter','PingFang SC','Microsoft YaHei',sans-serif;
  --font-mono:'JetBrains Mono','IBM Plex Mono','SFMono-Regular','Menlo',Consolas,monospace;

  /* 尺度 */
  --wrap:1200px;
  --gutter:24px;
  --radius-sm:10px;
  --radius-md:16px;
  --radius-lg:24px;

  /* 节奏 */
  --ease:cubic-bezier(.22,.61,.36,1);
  --dur:.32s;
}

/* ---------- 3. 中文基础排版 ---------- */
body{
  background-color:var(--ink-900);
  color:var(--offwhite-050);
  font-family:var(--font-body);
  font-size:16px;
  font-weight:400;
  line-height:1.75;
  letter-spacing:0;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  overflow-x:hidden;
}
h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:700;
  line-height:1.05;
  letter-spacing:.04em;
  color:var(--offwhite-050);
}
h1{font-size:clamp(34px,5.2vw,60px)}
h2{font-size:clamp(26px,3.6vw,38px)}
h3{font-size:clamp(20px,2.4vw,26px)}
h4{font-size:18px;letter-spacing:.03em}
p{font-size:16.5px;line-height:1.75}
small{font-size:13px;line-height:1.6}
strong{font-weight:700}
::selection{background:var(--amber-400);color:var(--inktext-900)}

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

/* ---------- 4. 容器与网格 ---------- */
.wrap{
  width:100%;
  max-width:var(--wrap);
  margin:0 auto;
  padding:0 var(--gutter);
}
.section{padding:64px 0}
.section--cream{background-color:var(--cream-100);color:var(--inktext-900)}
.section--cream h1,.section--cream h2,.section--cream h3{color:var(--inktext-900)}
.section--cream .section-label{color:#6C6A62}
.section--cream::selection,.section--cream ::selection{background:var(--ink-900);color:var(--cream-100)}

.bento{
  display:grid;
  grid-template-columns:repeat(12,minmax(0,1fr));
  gap:var(--gutter);
}
.bento > *{min-width:0}
.bento--u1{grid-column:span 3}
.bento--u2{grid-column:span 6}
.bento--u3{grid-column:span 4}
.bento--u4{grid-column:span 8}
.bento--u6{grid-column:span 12}

/* ---------- 5. 色相钩子（圆点 / 小面积） ---------- */
[data-tone="cyan"]{background-color:var(--cyan-400)}
[data-tone="amber"]{background-color:var(--amber-400)}
[data-tone="redorange"]{background-color:var(--redorange-500)}
[data-tone="graypurple"]{background-color:var(--graypurple-500)}
[data-tone="darkred"]{background-color:var(--darkred-600)}
[data-tone="grayblue"]{background-color:var(--grayblue-400)}

/* ---------- 6. 展览标签 ---------- */
.section-label{
  display:inline-flex;
  align-items:center;
  gap:9px;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.2em;
  line-height:1.4;
  color:var(--grayblue-400);
}
.section-label__dot{
  flex:none;
  width:8px;
  height:8px;
  border-radius:50%;
}
.section-label__name{white-space:nowrap}

/* ---------- 7. 文字工具 ---------- */
.mono{font-family:var(--font-mono);letter-spacing:.04em}
.num{
  font-family:var(--font-mono);
  font-weight:600;
  letter-spacing:.04em;
  font-variant-numeric:tabular-nums;
}
.visually-hidden{
  position:absolute;
  width:1px;height:1px;
  margin:-1px;padding:0;
  overflow:hidden;
  clip:rect(0 0 0 0);
  clip-path:inset(50%);
  white-space:nowrap;
  border:0;
}

/* ---------- 8. 通用按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  padding:13px 24px;
  border:1px solid transparent;
  border-radius:999px;
  font-family:var(--font-body);
  font-size:15px;
  font-weight:700;
  letter-spacing:.04em;
  line-height:1.2;
  cursor:pointer;
  transition:transform var(--dur) var(--ease),
             background-color var(--dur) var(--ease),
             color var(--dur) var(--ease),
             border-color var(--dur) var(--ease),
             box-shadow var(--dur) var(--ease);
}
.btn--primary{
  background-color:var(--amber-400);
  color:var(--inktext-900);
  box-shadow:0 0 0 0 rgba(242,178,62,0);
}
.btn--primary:hover{
  transform:translateY(-2px);
  box-shadow:0 10px 26px -12px rgba(242,178,62,.85);
}
.btn--ghost{
  border-color:var(--ink-500);
  color:var(--cream-100);
}
.btn--ghost:hover{
  border-color:var(--cyan-400);
  color:var(--cyan-400);
  transform:translateY(-2px);
}
.section--cream .btn--ghost{
  border-color:var(--cream-300);
  color:var(--inktext-900);
}
.section--cream .btn--ghost:hover{border-color:var(--inktext-900)}

/* ---------- 9. 面包屑 ---------- */
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:9px;
  padding:18px 0;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--grayblue-400);
}
.breadcrumb a{color:var(--grayblue-400);transition:color .2s var(--ease)}
.breadcrumb a:hover{color:var(--cyan-400)}
.breadcrumb__sep{opacity:.45}
.breadcrumb [aria-current="page"]{color:var(--cream-100)}

/* ---------- 10. 图片容器基础规则 ---------- */
.media-frame{
  position:relative;
  width:100%;
  overflow:hidden;
  border-radius:var(--radius-md);
  background-color:var(--ink-700);
  isolation:isolate;
}
.media-frame > img,
.media-frame > picture > img,
.media-frame > svg{
  width:100%;
  height:100%;
  object-fit:cover;
  display:block;
}
.media-frame--16x9{aspect-ratio:16 / 9}
.media-frame--4x3{aspect-ratio:4 / 3}
.media-frame--1x1{aspect-ratio:1 / 1}
.media-frame--21x9{aspect-ratio:21 / 9}
.media-frame__credit{
  position:absolute;
  left:12px;
  bottom:12px;
  padding:5px 11px;
  border-radius:999px;
  background-color:rgba(10,22,34,.74);
  color:var(--cream-100);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.08em;
  line-height:1.4;
}

/* ---------- 11. 滚动显现 ---------- */
.reveal{
  opacity:0;
  transform:translateY(22px);
  transition:opacity .44s var(--ease),transform .44s var(--ease);
  will-change:opacity,transform;
}
.reveal.is-visible{opacity:1;transform:none}
.reveal[data-delay="1"]{transition-delay:.07s}
.reveal[data-delay="2"]{transition-delay:.14s}
.reveal[data-delay="3"]{transition-delay:.21s}
.reveal[data-delay="4"]{transition-delay:.28s}
.reveal[data-delay="5"]{transition-delay:.35s}

/* ==========================================================================
   12. 页头
   ========================================================================== */
.skip-link{
  position:absolute;
  left:50%;
  top:-120px;
  transform:translateX(-50%);
  z-index:200;
  padding:11px 22px;
  background-color:var(--amber-400);
  color:var(--inktext-900);
  font-size:14px;
  font-weight:700;
  letter-spacing:.04em;
  border-radius:0 0 12px 12px;
  transition:top .22s var(--ease);
}
.skip-link:focus{top:0}

.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background-color:var(--ink-900);
  border-bottom:1px solid var(--ink-500);
}

/* 顶部数据条 —— 常驻 */
.databar{
  background-color:var(--ink-700);
  border-bottom:1px solid var(--ink-500);
}
.databar__inner{
  max-width:var(--wrap);
  margin:0 auto;
  padding:7px var(--gutter);
  display:flex;
  align-items:center;
  justify-content:flex-end;
  gap:9px;
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.04em;
  color:var(--grayblue-400);
  transition:padding .28s var(--ease);
}
.databar__dot{
  flex:none;
  width:7px;
  height:7px;
  border-radius:50%;
  background-color:var(--cyan-400);
  animation:datapulse 2.2s var(--ease) 2;
}
@keyframes datapulse{
  0%{box-shadow:0 0 0 0 rgba(47,227,208,.6)}
  70%{box-shadow:0 0 0 8px rgba(47,227,208,0)}
  100%{box-shadow:0 0 0 0 rgba(47,227,208,0)}
}
.databar__key{color:var(--grayblue-400);opacity:.78}
.databar__val{
  color:var(--cyan-400);
  font-weight:600;
  font-variant-numeric:tabular-nums;
}
.databar__val--time{color:var(--cream-100)}
.databar__unit{color:var(--cyan-400);opacity:.7}
.databar__div{
  width:1px;
  height:12px;
  margin:0 5px;
  background-color:var(--ink-500);
}

/* 居中刊头 */
.masthead{
  position:relative;
  background-image:
    radial-gradient(120% 150% at 50% -40%, rgba(47,227,208,.09), transparent 62%),
    radial-gradient(90% 120% at 12% 120%, rgba(242,178,62,.07), transparent 60%);
  background-color:var(--ink-900);
  border-bottom:1px solid var(--ink-500);
}
.masthead__inner{
  max-width:var(--wrap);
  margin:0 auto;
  padding:30px var(--gutter) 22px;
  text-align:center;
  transition:padding .3s var(--ease);
}
.masthead__kicker{
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.24em;
  color:var(--grayblue-400);
  transition:opacity .24s var(--ease);
}
.masthead__brand{
  display:inline-block;
  margin:6px 0 4px;
  padding-left:.16em;
  font-family:var(--font-display);
  font-weight:700;
  font-size:clamp(36px,6.4vw,58px);
  line-height:1.05;
  letter-spacing:.16em;
  color:var(--offwhite-050);
  transition:font-size .3s var(--ease),color .24s var(--ease);
}
.masthead__brand:hover{color:var(--amber-400)}
.masthead__sub{
  font-size:13.5px;
  letter-spacing:.08em;
  color:var(--grayblue-400);
}

/* 数据条 + 刊头滚动收窄 */
.site-header[data-scrolled] .masthead__inner{padding:12px var(--gutter) 10px}
.site-header[data-scrolled] .masthead__kicker{opacity:0;height:0;overflow:hidden}
.site-header[data-scrolled] .masthead__brand{font-size:clamp(22px,3.4vw,32px);letter-spacing:.12em}
.site-header[data-scrolled] .masthead__sub{display:none}
.site-header[data-scrolled] .databar__inner{padding-top:4px;padding-bottom:4px}

/* 移动端导航按钮 */
.nav-toggle{
  display:none;
  position:absolute;
  top:50%;
  right:18px;
  transform:translateY(-50%);
  align-items:center;
  gap:9px;
  padding:8px 14px;
  border:1px solid var(--ink-500);
  border-radius:999px;
  background-color:var(--ink-700);
  color:var(--cream-100);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.1em;
}
.nav-toggle__bars{
  display:inline-flex;
  flex-direction:column;
  gap:3px;
}
.nav-toggle__bars i{
  display:block;
  width:15px;
  height:1.5px;
  background-color:var(--cyan-400);
  transition:transform .24s var(--ease),opacity .24s var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(1){transform:translateY(4.5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(3){transform:translateY(-4.5px) rotate(-45deg)}

/* 栏目横排 */
.site-nav{
  background-color:var(--ink-900);
  border-bottom:1px solid var(--ink-500);
}
.site-nav__list{
  max-width:var(--wrap);
  margin:0 auto;
  padding:0 var(--gutter);
  display:flex;
  flex-wrap:wrap;
  justify-content:center;
  align-items:center;
  gap:2px 6px;
}
.site-nav__item{display:block}
.site-nav__link{
  position:relative;
  display:inline-flex;
  align-items:center;
  gap:9px;
  padding:14px 15px 13px;
  font-size:15px;
  font-weight:400;
  letter-spacing:.03em;
  color:var(--grayblue-400);
  transition:color .22s var(--ease);
}
.site-nav__dot{
  flex:none;
  width:6px;
  height:6px;
  border-radius:50%;
  transition:transform .22s var(--ease);
}
.site-nav__link:hover{color:var(--offwhite-050)}
.site-nav__link:hover .site-nav__dot{transform:scale(1.4)}
.site-nav__link[aria-current="page"]{color:var(--offwhite-050);font-weight:700}
.site-nav__link[aria-current="page"]::after{
  content:"";
  position:absolute;
  left:14px;
  right:14px;
  bottom:4px;
  height:2px;
  border-radius:2px;
  background-color:var(--amber-400);
}

/* 滚动进度轨 */
.scroll-rail{
  position:absolute;
  left:0;
  right:0;
  bottom:-1px;
  height:2px;
  transform:scaleX(0);
  transform-origin:0 50%;
  background-image:linear-gradient(90deg,var(--cyan-400),var(--amber-400));
  opacity:.9;
  pointer-events:none;
}

/* ==========================================================================
   13. 页脚
   ========================================================================== */
.site-footer{
  background-color:var(--ink-700);
  border-top:1px solid var(--cyan-400);
  color:var(--grayblue-400);
}
.site-footer__inner{
  max-width:var(--wrap);
  margin:0 auto;
  padding:56px var(--gutter) 28px;
}

.footer-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:36px var(--gutter);
  padding-bottom:36px;
  border-bottom:1px solid var(--ink-500);
}
.footer-col__title{
  display:flex;
  align-items:center;
  gap:9px;
  margin-bottom:18px;
  font-family:var(--font-display);
  font-size:15px;
  font-weight:700;
  letter-spacing:.16em;
  color:var(--cream-100);
}
.footer-col__dot{
  flex:none;
  width:7px;
  height:7px;
  border-radius:50%;
}
.footer-col__list{
  display:flex;
  flex-direction:column;
  gap:11px;
}
.footer-col__list a{
  display:inline-block;
  font-size:14.5px;
  line-height:1.5;
  color:var(--grayblue-400);
  border-bottom:1px solid transparent;
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.footer-col__list a:hover{
  color:var(--cream-100);
  border-bottom-color:var(--cyan-400);
}

.footer-channel{
  display:grid;
  grid-template-columns:1.5fr 1fr;
  gap:32px var(--gutter);
  padding:34px 0;
  border-bottom:1px solid var(--ink-500);
}
.footer-channel__label{
  margin-bottom:15px;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.22em;
  color:var(--cyan-400);
}
.footer-channel__line{
  display:flex;
  gap:14px;
  padding:5px 0;
  font-size:14.5px;
  line-height:1.6;
}
.footer-channel__key{
  flex:none;
  width:48px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--grayblue-400);
  opacity:.66;
}
.footer-channel__val{color:var(--cream-100)}
.footer-channel__hours{
  font-family:var(--font-mono);
  font-size:26px;
  font-weight:600;
  letter-spacing:.06em;
  line-height:1.2;
  color:var(--amber-400);
  font-variant-numeric:tabular-nums;
}
.footer-channel__note{
  margin-top:10px;
  font-size:13px;
  line-height:1.65;
  color:var(--grayblue-400);
  max-width:30ch;
}

.footer-base{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding-top:24px;
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.04em;
  color:var(--grayblue-400);
}
.footer-base__icp{color:var(--grayblue-400)}
.footer-base__meta{color:var(--grayblue-400);opacity:.86}

/* ==========================================================================
   14. 响应式
   ========================================================================== */
@media (max-width:1024px){
  .bento--u1{grid-column:span 4}
  .bento--u2{grid-column:span 8}
  .bento--u3{grid-column:span 6}
  .bento--u4{grid-column:span 12}
  .bento--u6{grid-column:span 12}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}

@media (max-width:900px){
  html{scroll-padding-top:112px}
  .nav-toggle{display:inline-flex}
  .masthead__inner{padding:24px 78px 20px}
  .site-header[data-scrolled] .masthead__inner{padding:12px 78px 10px}

  .site-nav{display:none}
  .site-nav[data-open]{display:block}
  .site-nav__list{
    flex-direction:column;
    align-items:stretch;
    gap:0;
    padding:8px 16px 18px;
  }
  .site-nav__link{
    width:100%;
    padding:14px 10px;
    font-size:16px;
    border-bottom:1px solid var(--ink-700);
    border-radius:0;
  }
  .site-nav__link[aria-current="page"]{
    background-color:var(--ink-700);
    padding-left:14px;
  }
  .site-nav__link[aria-current="page"]::after{display:none}
  .site-nav__link[aria-current="page"] .site-nav__dot{
    box-shadow:0 0 0 4px rgba(242,178,62,.16);
  }

  .footer-channel{grid-template-columns:1fr;gap:26px}
  .footer-channel__note{max-width:none}
}

@media (max-width:640px){
  :root{--gutter:16px}
  body{font-size:16px}
  p{font-size:16px}
  .section{padding:48px 0}

  .databar__inner{padding:6px var(--gutter);gap:7px;font-size:11.5px}
  .databar__div{margin:0 2px}
  .masthead__inner{padding:20px 70px 18px}
  .masthead__brand{letter-spacing:.1em}
  .masthead__sub{font-size:12.5px}
  .site-header[data-scrolled] .masthead__inner{padding:11px 70px 9px}
  .nav-toggle{right:12px;padding:7px 12px}

  .bento{grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}
  .bento--u1,.bento--u2,.bento--u3,.bento--u4,.bento--u6{grid-column:span 4}

  .footer-grid{grid-template-columns:1fr;gap:30px;padding-bottom:30px}
  .footer-channel{padding:28px 0}
  .footer-base{flex-direction:column;align-items:flex-start;gap:8px}
}

/* ---------- 15. 无障碍：减弱动效 ---------- */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    transition-delay:0s !important;
  }
  .reveal{opacity:1;transform:none}
  .databar__dot{animation:none}
  .scroll-rail{transition:none}
}