/* ============================================================
   新2投注网 / 共享样式表  /assets/site.css
   深空夜幕基底 + 深蓝同色阶层级 + 霓虹青强调 + 活力橙信号
   ============================================================ */

:root{
  --bg:#070B14;
  --panel:#0D1524;
  --raised:#141F35;
  --line:#1E2E4A;
  --mid:#2C4A7C;
  --steel:#4D7FB8;
  --silver:#B9C7D9;
  --white:#E8EEF6;
  --cyan:#33E6D0;
  --orange:#FF7A29;

  --line-soft:rgba(30,46,74,.65);
  --cyan-soft:rgba(51,230,208,.12);
  --orange-soft:rgba(255,122,41,.14);

  --shell:1280px;
  --shell-wide:1560px;
  --gutter:clamp(16px,4vw,40px);

  --r-lg:24px;
  --r-md:16px;
  --r-sm:10px;

  --ease:cubic-bezier(.22,.61,.36,1);
  --shadow:0 18px 48px -26px rgba(0,0,0,.95);

  --f-head:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --f-body:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --f-mono:"JetBrains Mono","Roboto Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--silver);
  font-family:var(--f-body);
  font-size:16px;
  font-weight:400;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  overflow-x:hidden;
}
img,svg,video{display:block;max-width:100%}
ul,ol{margin:0;padding:0;list-style:none}
button,input,select,textarea{font:inherit;color:inherit}
button{background:none;border:0;cursor:pointer}
a{color:var(--cyan);text-decoration:none}
a:hover{text-decoration:underline}
::selection{background:rgba(51,230,208,.28);color:var(--white)}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:6px}
#main-content{display:block;scroll-margin-top:88px}

/* ---------- 中文排版 ---------- */
h1,h2,h3,h4,h5,h6{
  margin:0;
  color:var(--white);
  font-family:var(--f-head);
  font-weight:900;
  letter-spacing:-.02em;
  line-height:1.16;
}
h1{font-size:clamp(32px,5vw,56px)}
h2{font-size:clamp(24px,3.2vw,34px)}
h3{font-size:clamp(18px,2vw,22px)}
h4{font-size:17px}
p{margin:0 0 1em}
p:last-child{margin-bottom:0}
strong{color:var(--white);font-weight:700}
.mono{
  font-family:var(--f-mono);
  font-variant-numeric:tabular-nums;
  letter-spacing:0;
}

/* ---------- 布局 ---------- */
.shell{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.shell--wide{max-width:var(--shell-wide)}
.section{padding-block:clamp(48px,7vw,96px);position:relative}
.section--tight{padding-block:clamp(30px,4vw,56px)}
.section--panel{background:var(--panel)}

.rule{
  height:1px;
  border:0;
  margin:0;
  background:linear-gradient(90deg,var(--line),rgba(30,46,74,0));
}

.section-head{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  justify-content:space-between;
  gap:20px;
  margin-bottom:clamp(22px,3vw,40px);
}
.section-head__text{max-width:62ch}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  margin-bottom:14px;
  font-family:var(--f-mono);
  font-size:12px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--steel);
}
.eyebrow::before{
  content:"";
  width:20px;
  height:1px;
  background:var(--cyan);
  box-shadow:0 0 10px rgba(51,230,208,.7);
}

.lede{
  font-size:clamp(16px,1.6vw,19px);
  line-height:1.7;
  color:var(--silver);
  max-width:62ch;
}
.prose{max-width:68ch}
.prose p{margin-bottom:1.1em}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:12px 22px;
  border:1px solid transparent;
  border-radius:999px;
  font-family:var(--f-head);
  font-size:15px;
  font-weight:700;
  letter-spacing:.01em;
  text-align:center;
  text-decoration:none;
  cursor:pointer;
  transition:transform .18s var(--ease),background-color .18s var(--ease),
             border-color .18s var(--ease),box-shadow .18s var(--ease),color .18s var(--ease);
}
.btn:hover{text-decoration:none;transform:translateY(-2px)}
.btn:active{transform:translateY(0)}
.btn--primary{
  background:var(--cyan);
  color:#03110F;
  box-shadow:0 12px 28px -16px rgba(51,230,208,.95);
}
.btn--primary:hover{background:#5BF0DE;box-shadow:0 16px 32px -14px rgba(51,230,208,.95)}
.btn--ghost{
  background:rgba(20,31,53,.6);
  color:var(--white);
  border-color:var(--line);
}
.btn--ghost:hover{border-color:rgba(51,230,208,.55);color:var(--cyan)}
.btn--sm{padding:8px 16px;font-size:13px}
.btn--sm:hover{transform:translateY(-1px)}

/* ---------- 胶囊与标签 ---------- */
.pill{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:5px 12px;
  border:1px solid var(--line);
  border-radius:999px;
  background:var(--raised);
  color:var(--silver);
  font-size:12px;
  font-weight:600;
  white-space:nowrap;
}
.ver-badge{
  display:inline-flex;
  align-items:center;
  gap:7px;
  padding:5px 12px 5px 10px;
  border:1px solid rgba(51,230,208,.32);
  border-radius:999px;
  background:rgba(51,230,208,.08);
  color:var(--cyan);
  font-family:var(--f-mono);
  font-size:12px;
  font-weight:700;
  letter-spacing:.08em;
}
.ver-badge__dot{
  width:6px;
  height:6px;
  border-radius:50%;
  background:var(--cyan);
  box-shadow:0 0 10px var(--cyan);
}
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 10px;
  border:1px solid rgba(77,127,184,.28);
  border-radius:6px;
  background:rgba(77,127,184,.14);
  color:var(--steel);
  font-family:var(--f-mono);
  font-size:11px;
  letter-spacing:.06em;
  white-space:nowrap;
}
.tag--cyan{
  border-color:rgba(51,230,208,.3);
  background:var(--cyan-soft);
  color:var(--cyan);
}
.tag--orange{
  border-color:rgba(255,122,41,.32);
  background:var(--orange-soft);
  color:var(--orange);
}

/* ---------- 卡片与面板 ---------- */
.card{
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--r-md);
  padding:clamp(18px,2.4vw,26px);
  transition:border-color .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease);
}
.card:hover{
  border-color:rgba(51,230,208,.36);
  transform:translateY(-4px);
  box-shadow:var(--shadow);
}
.card__title{
  display:block;
  margin:0 0 10px;
  color:var(--white);
  font-size:17px;
  font-weight:800;
  letter-spacing:-.01em;
  line-height:1.35;
}
.panel{
  background:linear-gradient(180deg,var(--panel),rgba(13,21,36,.72));
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  overflow:hidden;
}
.panel__head{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding:13px 20px;
  border-bottom:1px solid var(--line);
  background:rgba(20,31,53,.72);
}
.panel__title{
  margin:0;
  color:var(--white);
  font-family:var(--f-mono);
  font-size:13px;
  font-weight:700;
  letter-spacing:.08em;
}
.panel__body{padding:clamp(18px,2.4vw,26px)}

/* ---------- 分屏 / 网格 ---------- */
.split{
  display:grid;
  grid-template-columns:minmax(0,5fr) minmax(0,7fr);
  gap:clamp(24px,4vw,48px);
  align-items:start;
}
.grid{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(240px,1fr));
  gap:clamp(16px,2vw,24px);
}

/* ---------- 数据条 ---------- */
.statbar{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(140px,1fr));
  gap:1px;
  background:var(--line);
  border:1px solid var(--line);
  border-radius:var(--r-md);
  overflow:hidden;
}
.stat{background:var(--panel);padding:16px 18px}
.stat__value{
  font-family:var(--f-mono);
  font-size:24px;
  font-weight:700;
  line-height:1.2;
  color:var(--white);
  font-variant-numeric:tabular-nums;
}
.stat__value em{font-style:normal;color:var(--cyan)}
.stat__label{margin-top:4px;font-size:13px;color:var(--steel)}

/* ---------- 面包屑 ---------- */
.breadcrumbs{font-family:var(--f-mono);font-size:13px;color:var(--steel)}
.breadcrumbs ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.breadcrumbs li{display:inline-flex;align-items:center;gap:8px}
.breadcrumbs li + li::before{content:"›";color:var(--line);font-size:14px}
.breadcrumbs a{color:var(--steel)}
.breadcrumbs a:hover{color:var(--cyan);text-decoration:none}

/* ---------- 图片容器基础（页面阶段放置图片） ---------- */
.media-frame{
  position:relative;
  aspect-ratio:16/10;
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  overflow:hidden;
  background:
    radial-gradient(120% 90% at 15% 8%,rgba(44,74,124,.5),transparent 62%),
    radial-gradient(90% 70% at 92% 96%,rgba(51,230,208,.12),transparent 58%),
    linear-gradient(160deg,#0A1222,#070B14);
}
.media-frame::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  opacity:.32;
  background-image:
    linear-gradient(rgba(30,46,74,.6) 1px,transparent 1px),
    linear-gradient(90deg,rgba(30,46,74,.6) 1px,transparent 1px);
  background-size:48px 48px;
  -webkit-mask-image:linear-gradient(180deg,rgba(0,0,0,.95),transparent);
  mask-image:linear-gradient(180deg,rgba(0,0,0,.95),transparent);
}
.media-frame img{
  width:100%;
  height:100%;
  object-fit:cover;
}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--square{aspect-ratio:1/1}
.media-frame__caption{
  position:absolute;
  left:16px;
  bottom:14px;
  z-index:2;
  padding:5px 11px;
  border:1px solid var(--line);
  border-radius:999px;
  background:rgba(7,11,20,.72);
  color:var(--silver);
  font-family:var(--f-mono);
  font-size:12px;
  -webkit-backdrop-filter:blur(6px);
  backdrop-filter:blur(6px);
}

/* ============================================================
   头部：双层信息导航
   ============================================================ */
.skip-link{
  position:absolute;
  top:-64px;
  left:14px;
  z-index:300;
  padding:10px 18px;
  border-radius:0 0 12px 12px;
  background:var(--cyan);
  color:#03110F;
  font-weight:700;
  text-decoration:none;
  transition:top .2s var(--ease);
}
.skip-link:hover{text-decoration:none}
.skip-link:focus{top:0}

.site-header{position:relative;z-index:120}

.brandbar{
  background:linear-gradient(180deg,#0A1120,var(--bg));
  border-bottom:1px solid var(--line);
}
.brandbar__inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  padding-block:14px;
  transition:padding .24s var(--ease);
}
[data-header][data-scrolled] .brandbar__inner{padding-block:8px}

.brand{
  display:inline-flex;
  align-items:center;
  gap:12px;
  min-width:0;
  color:inherit;
  text-decoration:none;
}
.brand:hover{text-decoration:none}
.brand__mark{
  display:grid;
  grid-template-columns:repeat(3,3px);
  align-items:end;
  gap:3px;
  width:26px;
  height:26px;
  padding:3px;
  border:1px solid rgba(51,230,208,.3);
  border-radius:8px;
  background:rgba(51,230,208,.08);
  flex:0 0 auto;
}
.brand__mark i{display:block;width:3px;border-radius:2px;background:var(--cyan)}
.brand__mark i:nth-child(1){height:6px;background:var(--steel)}
.brand__mark i:nth-child(2){height:11px}
.brand__mark i:nth-child(3){height:15px;background:var(--white)}

.brand__text{display:flex;flex-direction:column;gap:1px;min-width:0}
.brand__name{
  color:var(--white);
  font-family:var(--f-head);
  font-size:18px;
  font-weight:900;
  letter-spacing:-.01em;
  line-height:1.2;
}
.brand__tag{font-size:12.5px;color:var(--steel);line-height:1.3}

.brandbar__meta{
  display:flex;
  align-items:center;
  gap:12px;
  flex:0 0 auto;
}

.navbar{
  position:sticky;
  top:0;
  z-index:110;
  background:rgba(13,21,36,.92);
  border-bottom:1px solid var(--line);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  transition:box-shadow .24s var(--ease);
}
[data-header][data-scrolled] .navbar{box-shadow:0 14px 34px -24px rgba(0,0,0,1)}

.navbar__inner{
  position:relative;
  display:flex;
  align-items:center;
  gap:16px;
  min-height:56px;
}

.nav{flex:1 1 auto;min-width:0}
.nav__list{
  display:flex;
  align-items:center;
  gap:4px;
  overflow-x:auto;
  scrollbar-width:none;
}
.nav__list::-webkit-scrollbar{display:none}
.nav__item{flex:0 0 auto}

.nav__link{
  position:relative;
  display:inline-flex;
  align-items:center;
  height:56px;
  padding:0 14px;
  color:var(--silver);
  font-family:var(--f-head);
  font-size:15px;
  font-weight:600;
  letter-spacing:.01em;
  text-decoration:none;
  transition:color .18s var(--ease);
}
.nav__link:hover{color:var(--white);text-decoration:none}
.nav__link::after{
  content:"";
  position:absolute;
  left:14px;
  right:14px;
  bottom:14px;
  height:2px;
  border-radius:2px;
  background:var(--cyan);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease);
}
.nav__link:hover::after{transform:scaleX(.45)}
.nav__link[aria-current="page"]{color:var(--white)}
.nav__link[aria-current="page"]::after{
  transform:scaleX(1);
  box-shadow:0 0 12px rgba(51,230,208,.6);
}

.nav-toggle{
  display:none;
  align-items:center;
  gap:10px;
  padding:8px 14px;
  border:1px solid var(--line);
  border-radius:999px;
  background:var(--raised);
  color:var(--white);
  font-family:var(--f-head);
  font-size:14px;
  font-weight:700;
}
.nav-toggle__bars{display:grid;gap:4px;width:16px}
.nav-toggle__bars i{
  display:block;
  height:2px;
  border-radius:2px;
  background:var(--cyan);
  transition:transform .2s var(--ease),opacity .2s var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(1){transform:translateY(6px) 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(-6px) rotate(-45deg)}

/* ============================================================
   页脚
   ============================================================ */
.site-footer{
  margin-top:clamp(48px,7vw,96px);
  background:linear-gradient(180deg,#0A1120,var(--bg));
  border-top:1px solid var(--line);
}
.footer__grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.4fr;
  gap:clamp(24px,3vw,44px);
  padding-block:clamp(40px,5vw,64px);
}
.footer__col{min-width:0}
.footer__col--brand{max-width:36ch}

.footer__logo{
  margin:0 0 10px;
  color:var(--white);
  font-family:var(--f-head);
  font-size:20px;
  font-weight:900;
  letter-spacing:-.01em;
}
.footer__domain{
  display:inline-block;
  margin:0 0 12px;
  padding:4px 11px;
  border:1px solid rgba(51,230,208,.28);
  border-radius:999px;
  background:rgba(51,230,208,.06);
  color:var(--cyan);
  font-size:13px;
}
.footer__icp{margin:0 0 12px;font-size:13px;color:var(--steel)}
.footer__icp a{color:var(--steel)}
.footer__icp a:hover{color:var(--cyan);text-decoration:none}
.footer__note{margin:0 0 14px;font-size:13px;line-height:1.7;color:var(--steel)}

.footer__title{
  margin:0 0 16px;
  color:var(--steel);
  font-family:var(--f-mono);
  font-size:12px;
  font-weight:700;
  letter-spacing:.16em;
  text-transform:uppercase;
  line-height:1.4;
}
.footer__list{display:grid;gap:10px}
.footer__link{
  color:var(--silver);
  font-size:14.5px;
  text-decoration:none;
  transition:color .16s var(--ease);
}
.footer__link:hover{color:var(--cyan);text-decoration:none}

.footer__meta{display:grid;gap:12px;margin:0 0 16px}
.footer__meta li{display:grid;gap:3px}
.footer__label{
  font-family:var(--f-mono);
  font-size:11px;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--steel);
}
.footer__value{color:var(--silver);font-size:14px;line-height:1.5;overflow-wrap:anywhere}

.footer__base{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding-block:20px;
  border-top:1px solid var(--line);
  color:var(--steel);
  font-size:13px;
}
.footer__base p{margin:0}

/* ============================================================
   入场显现
   ============================================================ */
.js-anim [data-reveal]{
  opacity:0;
  transform:translateY(14px);
  transition:opacity .32s var(--ease),transform .32s var(--ease);
}
.js-anim [data-reveal].is-visible{
  opacity:1;
  transform:none;
}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width:1100px){
  .footer__grid{grid-template-columns:1fr 1fr;gap:32px}
  .footer__col--brand{grid-column:1 / -1;max-width:none}
}

@media (max-width:900px){
  .nav-toggle{display:inline-flex}

  .navbar__inner{flex-wrap:wrap}
  .nav{
    position:absolute;
    left:calc(var(--gutter) * -1);
    right:calc(var(--gutter) * -1);
    top:100%;
    max-height:0;
    overflow:hidden;
    background:rgba(20,31,53,.98);
    border-bottom:1px solid var(--line);
    box-shadow:0 22px 40px -28px rgba(0,0,0,1);
    transition:max-height .3s var(--ease);
  }
  .nav[data-open]{max-height:min(70vh,430px);overflow-y:auto}
  .nav__list{
    flex-direction:column;
    align-items:stretch;
    gap:0;
    padding:6px var(--gutter) 14px;
    overflow:visible;
  }
  .nav__item{border-bottom:1px solid var(--line-soft)}
  .nav__item:last-child{border-bottom:0}
  .nav__link{
    width:100%;
    height:auto;
    padding:14px 2px;
    font-size:16px;
  }
  .nav__link::after{display:none}
  .nav__link[aria-current="page"]{color:var(--cyan)}

  .split{grid-template-columns:minmax(0,1fr)}
}

@media (max-width:640px){
  .brand__tag{display:none}
  .brand__name{font-size:16px}
  .brand__mark{width:24px;height:24px}
  .btn{padding:11px 18px;font-size:14px}
  .btn--sm{padding:7px 13px;font-size:12.5px}
  .footer__grid{grid-template-columns:1fr;gap:28px}
  .footer__base{flex-direction:column;align-items:flex-start}
  .stat__value{font-size:21px}
}

/* ============================================================
   无障碍与动效偏好
   ============================================================ */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  .btn:hover,.card:hover{transform:none}
  .js-anim [data-reveal]{opacity:1;transform:none}
}