/* ============================================================
   欧宝娱乐主站 · 共享样式 /assets/site.css
   深色看台 / 霓虹数据线 / 堆叠面板
   ============================================================ */

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%}
body,h1,h2,h3,h4,h5,p,ul,ol,figure,blockquote,dl,dd{margin:0}
ul,ol{padding:0;list-style:none}
img,svg,video{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
button{background:none;border:0;cursor:pointer}
table{border-collapse:collapse;width:100%}
hr{border:0;border-top:1px solid var(--ob-line)}

/* ---------- tokens ---------- */
:root{
  --ob-deep:#070E22;
  --ob-panel:#0F1B38;
  --ob-line:#2B3A5C;
  --ob-fog:#E8EFFA;
  --ob-silver:#9AA9C2;
  --ob-mint:#17F2C4;
  --ob-mint-dim:#0E9E82;
  --ob-orange:#FF8B3D;
  --ob-amber:#FFC98C;
  --ob-blue:#1B3C7A;
  --ob-alert:#FF5C7A;

  --ob-shell:1240px;
  --ob-rail:88px;

  --ob-radius-lg:24px;
  --ob-radius:16px;
  --ob-radius-sm:10px;

  --ob-shadow:0 34px 70px -46px rgba(0,0,0,.95);
  --ob-shadow-lift:0 46px 96px -52px rgba(0,0,0,1);

  --ob-gap:clamp(16px,2vw,26px);
  --ob-ease:ease-out;

  --font-display:"Arial Narrow","Helvetica Neue Condensed","Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --font-body:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:ui-monospace,"SFMono-Regular","Cascadia Mono","JetBrains Mono",Menlo,Consolas,monospace;
}

/* ---------- base ---------- */
body{
  min-height:100%;
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.8;
  color:var(--ob-fog);
  background-color:var(--ob-deep);
  background-image:
    radial-gradient(1180px 660px at 84% -12%, rgba(27,60,122,.62), transparent 62%),
    radial-gradient(760px 520px at -12% 14%, rgba(14,158,130,.16), transparent 62%),
    repeating-linear-gradient(90deg, rgba(43,58,92,.18) 0 1px, transparent 1px 96px);
  background-attachment:fixed,fixed,scroll;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
::selection{background:rgba(23,242,196,.28);color:#04170F}

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

#main-content{scroll-margin-top:112px}

/* ---------- 中文排版 ---------- */
p{line-height:1.8}
strong{font-weight:700;color:#fff}
em{font-style:normal;color:var(--ob-amber)}

/* ---------- 容器与栅格 ---------- */
.shell{
  width:100%;
  max-width:var(--ob-shell);
  margin-inline:auto;
  padding-inline:clamp(16px,4vw,40px);
}
.section{padding-block:clamp(56px,8vw,112px)}
.grid{display:grid;gap:var(--ob-gap)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
@media (max-width:900px){
  .grid--3{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:620px){
  .grid--2,.grid--3{grid-template-columns:minmax(0,1fr)}
}

/* ---------- 章节标识 ---------- */
.section-head{
  display:grid;
  grid-template-columns:auto minmax(0,1fr);
  gap:clamp(14px,2.6vw,32px);
  align-items:end;
  margin-bottom:clamp(24px,3.6vw,46px);
}
.section-head__body{
  display:flex;
  flex-direction:column;
  gap:10px;
  padding-bottom:.35em;
  min-width:0;
}
@media (max-width:700px){
  .section-head{grid-template-columns:minmax(0,1fr);align-items:start;gap:10px}
  .section-head__body{padding-bottom:0}
}
.section-no{
  display:block;
  font-family:var(--font-display);
  font-weight:300;
  font-size:clamp(3rem,7.4vw,7.2rem);
  line-height:.82;
  letter-spacing:-.03em;
  color:rgba(232,239,250,.10);
  -webkit-text-stroke:1px rgba(43,58,92,.95);
  transition:color .42s var(--ob-ease),-webkit-text-stroke-color .42s var(--ob-ease),transform .42s var(--ob-ease);
}
[data-section].is-live .section-no{
  color:rgba(23,242,196,.20);
  -webkit-text-stroke-color:rgba(23,242,196,.62);
  transform:translateX(6px);
}
.section-kicker{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--ob-silver);
}
.section-kicker::before{
  content:"";
  width:22px;
  height:2px;
  background:var(--ob-orange);
  flex:none;
}
.section-title{
  font-family:var(--font-display);
  font-weight:300;
  font-size:clamp(1.6rem,3.4vw,2.85rem);
  line-height:1.08;
  letter-spacing:.01em;
  text-transform:uppercase;
  color:var(--ob-fog);
}

/* ---------- 面板 ---------- */
.panel{
  position:relative;
  padding:clamp(20px,3vw,34px);
  background:linear-gradient(158deg, rgba(15,27,56,.97), rgba(11,20,42,.97));
  border:1px solid var(--ob-line);
  border-radius:var(--ob-radius-lg);
  box-shadow:var(--ob-shadow), inset 0 1px 0 rgba(232,239,250,.05);
}

/* ---------- 标签 ---------- */
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:3px 10px;
  border-radius:6px;
  border:1px solid var(--ob-line);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--ob-silver);
  white-space:nowrap;
}
.tag--mint{
  color:var(--ob-mint);
  border-color:rgba(23,242,196,.45);
  background:rgba(23,242,196,.08);
}
.tag--orange{
  color:var(--ob-amber);
  border-color:rgba(255,139,61,.5);
  background:rgba(255,139,61,.10);
}

/* ---------- 数字 ---------- */
.num{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  letter-spacing:.04em;
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:9px 18px;
  border-radius:999px;
  border:1px solid var(--ob-line);
  background:transparent;
  color:var(--ob-fog);
  font-family:var(--font-body);
  font-size:13.5px;
  line-height:1.3;
  letter-spacing:.08em;
  white-space:nowrap;
  cursor:pointer;
  transition:background .2s var(--ob-ease),border-color .2s var(--ob-ease),
             color .2s var(--ob-ease),box-shadow .2s var(--ob-ease),transform .2s var(--ob-ease);
}
.btn:hover{border-color:var(--ob-mint);color:var(--ob-mint)}
.btn:active{transform:translateY(1px)}
.btn--primary{
  background:var(--ob-mint);
  border-color:var(--ob-mint);
  color:#04170F;
  font-weight:700;
  box-shadow:0 14px 30px -16px rgba(23,242,196,.85);
}
.btn--primary:hover{background:#41FFD5;border-color:#41FFD5;color:#04170F}
.btn--ghost{color:var(--ob-silver)}
.btn--ghost:hover{color:var(--ob-mint);border-color:var(--ob-mint);background:rgba(23,242,196,.07)}
.btn--orange{
  background:var(--ob-orange);
  border-color:var(--ob-orange);
  color:#22100A;
  font-weight:700;
}
.btn--orange:hover{background:#FFA362;border-color:#FFA362;color:#22100A}

/* ---------- 图片容器基础（页面阶段放置占位） ---------- */
.figure{
  position:relative;
  display:block;
  overflow:hidden;
  border:1px solid var(--ob-line);
  border-radius:var(--ob-radius);
  background:linear-gradient(150deg,#0F1B38,#070E22);
  box-shadow:var(--ob-shadow);
}
.figure__media{
  display:block;
  width:100%;
  aspect-ratio:16/10;
  object-fit:cover;
  background:
    linear-gradient(135deg, rgba(27,60,122,.55), rgba(7,14,34,.9)),
    repeating-linear-gradient(45deg, rgba(43,58,92,.5) 0 1px, transparent 1px 14px);
}
.figure--tall .figure__media{aspect-ratio:4/5}
.figure--square .figure__media{aspect-ratio:1/1}
.figure__caption{
  display:block;
  padding:10px 14px;
  border-top:1px solid var(--ob-line);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.1em;
  color:var(--ob-silver);
}

/* ---------- 面包屑 ---------- */
.breadcrumb{margin-bottom:clamp(20px,3vw,34px)}
.breadcrumb__list{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.12em;
  color:var(--ob-silver);
}
.breadcrumb__item{display:inline-flex;align-items:center;gap:8px}
.breadcrumb__link{color:var(--ob-silver);transition:color .2s var(--ob-ease)}
.breadcrumb__link:hover{color:var(--ob-mint)}
.breadcrumb__sep{color:var(--ob-line)}
.breadcrumb__current{color:var(--ob-fog)}

/* ---------- 正文容器 ---------- */
.prose{max-width:42em;color:var(--ob-fog)}
.prose h2,.prose h3{
  font-family:var(--font-display);
  font-weight:300;
  line-height:1.15;
  letter-spacing:.01em;
  text-transform:uppercase;
  color:var(--ob-fog);
  margin:1.7em 0 .6em;
}
.prose h2{font-size:clamp(1.5rem,2.6vw,2.1rem)}
.prose h3{font-size:clamp(1.15rem,1.9vw,1.45rem)}
.prose p{margin:0 0 1.15em}
.prose ul,.prose ol{margin:0 0 1.3em;padding-left:1.2em;list-style:disc}
.prose ol{list-style:decimal}
.prose li{margin-bottom:.5em}
.prose li::marker{color:var(--ob-mint-dim)}
.prose a{color:var(--ob-mint);border-bottom:1px solid rgba(23,242,196,.4)}
.prose a:hover{border-bottom-color:var(--ob-mint)}
.prose blockquote{
  margin:1.4em 0;
  padding:12px 0 12px 18px;
  border-left:2px solid var(--ob-orange);
  color:var(--ob-silver);
}

/* ---------- 跳过链接 ---------- */
.skip-link{
  position:fixed;
  left:-9999px;
  top:0;
  z-index:200;
  padding:12px 22px;
  background:var(--ob-mint);
  color:#04170F;
  font-weight:700;
  letter-spacing:.06em;
  border-radius:0 0 12px 0;
}
.skip-link:focus{left:0;top:0}

/* ============================================================
   头部
   ============================================================ */
.site-header{
  position:sticky;
  top:0;
  z-index:90;
  padding:14px clamp(14px,2.4vw,28px) 0;
}
.site-header::before{
  content:"";
  position:absolute;
  inset:0 0 -20px;
  z-index:-1;
  pointer-events:none;
  background:linear-gradient(180deg,
    rgba(7,14,34,.96) 0%,
    rgba(7,14,34,.84) 56%,
    rgba(7,14,34,0) 100%);
}
.site-header__inner{
  position:relative;
  max-width:var(--ob-shell);
  margin-inline:auto;
  display:flex;
  align-items:center;
  gap:18px;
  padding:10px 14px 10px 18px;
  background:rgba(15,27,56,.82);
  border:1px solid var(--ob-line);
  border-radius:999px;
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  box-shadow:0 20px 46px -26px rgba(0,0,0,.95), inset 0 1px 0 rgba(232,239,250,.06);
  transition:background .28s var(--ob-ease),box-shadow .28s var(--ob-ease),
             padding .28s var(--ob-ease),border-color .28s var(--ob-ease);
}
.site-header[data-scrolled="true"] .site-header__inner{
  padding-top:7px;
  padding-bottom:7px;
  background:rgba(7,14,34,.95);
  border-color:#35476F;
  box-shadow:0 26px 58px -30px rgba(0,0,0,1), inset 0 1px 0 rgba(232,239,250,.06);
}

/* 品牌 */
.brand{
  display:inline-flex;
  align-items:center;
  gap:12px;
  flex:none;
  min-width:0;
}
.brand__mark,.footer-brand__mark{
  display:inline-flex;
  align-items:flex-end;
  gap:3px;
  width:32px;
  height:32px;
  padding:7px;
  flex:none;
  border-radius:10px;
  background:rgba(23,242,196,.10);
  border:1px solid rgba(23,242,196,.42);
}
.brand__mark span,.footer-brand__mark span{
  display:block;
  flex:1 1 auto;
  background:var(--ob-mint);
  border-radius:1px;
}
.brand__mark span:nth-child(1),.footer-brand__mark span:nth-child(1){height:38%}
.brand__mark span:nth-child(2),.footer-brand__mark span:nth-child(2){height:80%}
.brand__mark span:nth-child(3),.footer-brand__mark span:nth-child(3){height:54%}
.brand__text{display:flex;flex-direction:column;gap:1px;min-width:0}
.brand__name{
  font-size:15px;
  font-weight:700;
  line-height:1.25;
  letter-spacing:.05em;
  color:var(--ob-fog);
  white-space:nowrap;
}
.brand__tagline{
  font-family:var(--font-mono);
  font-size:10.5px;
  line-height:1.3;
  letter-spacing:.14em;
  color:var(--ob-silver);
  white-space:nowrap;
}
@media (max-width:560px){
  .brand__tagline{display:none}
}

/* 移动导航按钮 */
.nav-toggle{
  display:none;
  margin-left:auto;
  align-items:center;
  gap:10px;
  padding:8px 14px;
  border:1px solid var(--ob-line);
  border-radius:999px;
  color:var(--ob-fog);
  font-size:12px;
  letter-spacing:.12em;
  transition:border-color .2s var(--ob-ease),color .2s var(--ob-ease),background .2s var(--ob-ease);
}
.nav-toggle:hover{border-color:var(--ob-mint);color:var(--ob-mint)}
.nav-toggle__label{white-space:nowrap}
.nav-toggle__bars{
  display:inline-flex;
  flex-direction:column;
  justify-content:center;
  gap:4px;
  width:18px;
  flex:none;
}
.nav-toggle__bars span{
  display:block;
  height:2px;
  width:100%;
  border-radius:2px;
  background:currentColor;
  transition:transform .22s var(--ob-ease),opacity .22s var(--ob-ease);
}
.nav-toggle[aria-expanded="true"]{border-color:var(--ob-mint);color:var(--ob-mint);background:rgba(23,242,196,.08)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

/* 导航 */
.site-nav{
  margin-left:auto;
  display:flex;
  align-items:center;
  gap:22px;
  min-width:0;
}
.site-nav__list{
  display:flex;
  align-items:center;
  gap:2px;
  min-width:0;
}
.site-nav__item{display:flex;min-width:0}
.site-nav__link{
  display:inline-flex;
  align-items:center;
  padding:8px 12px;
  border:1px solid transparent;
  border-radius:999px;
  color:var(--ob-silver);
  font-size:14px;
  letter-spacing:.04em;
  white-space:nowrap;
  transition:color .2s var(--ob-ease),background .2s var(--ob-ease),border-color .2s var(--ob-ease);
}
.site-nav__link:hover{color:var(--ob-fog);background:rgba(232,239,250,.07)}
.site-nav__link[aria-current="page"]{
  color:var(--ob-mint);
  border-color:rgba(23,242,196,.62);
  background:rgba(23,242,196,.09);
}
.site-nav__actions{
  display:flex;
  align-items:center;
  gap:10px;
  padding-left:16px;
  border-left:1px solid var(--ob-line);
  flex:none;
}

/* 滚动进度 */
.scroll-progress{
  position:fixed;
  left:0;
  top:0;
  width:100%;
  height:3px;
  z-index:120;
  pointer-events:none;
  transform:scaleX(0);
  transform-origin:0 50%;
  background:linear-gradient(90deg,var(--ob-mint) 0%,var(--ob-mint-dim) 58%,var(--ob-orange) 100%);
}

/* 头部 · 平板与移动端 */
@media (max-width:1120px){
  .site-nav{gap:12px}
  .site-nav__link{padding:8px 9px;font-size:13.5px}
  .site-nav__actions{padding-left:12px}
}
@media (max-width:980px){
  .nav-toggle{display:inline-flex}
  .site-nav{
    position:absolute;
    left:0;
    right:0;
    top:calc(100% + 10px);
    margin:0;
    display:none;
    flex-direction:column;
    align-items:stretch;
    gap:16px;
    padding:18px;
    background:rgba(9,17,38,.98);
    border:1px solid var(--ob-line);
    border-radius:var(--ob-radius-lg);
    box-shadow:0 40px 80px -34px rgba(0,0,0,1);
    max-height:calc(100vh - 130px);
    overflow-y:auto;
  }
  .site-nav[data-open]{display:flex}
  .site-nav__list{flex-direction:column;align-items:stretch;gap:4px}
  .site-nav__item{display:block}
  .site-nav__link{
    padding:13px 15px;
    border-radius:14px;
    font-size:15.5px;
    width:100%;
  }
  .site-nav__actions{
    flex-direction:column;
    align-items:stretch;
    gap:10px;
    padding:16px 0 0;
    border-left:0;
    border-top:1px solid var(--ob-line);
  }
  .site-nav__actions .btn{width:100%}
}

/* ============================================================
   页脚
   ============================================================ */
.site-footer{
  margin-top:clamp(64px,9vw,140px);
  padding-block:clamp(44px,6vw,76px) 28px;
  border-top:1px solid var(--ob-line);
  background:linear-gradient(180deg, rgba(15,27,56,.55) 0%, rgba(7,14,34,1) 42%);
}
.site-footer__inner{
  width:100%;
  max-width:var(--ob-shell);
  margin-inline:auto;
  padding-inline:clamp(16px,4vw,40px);
}
.footer-top{
  display:grid;
  grid-template-columns:minmax(230px,1.5fr) repeat(3,minmax(140px,1fr));
  gap:clamp(24px,4vw,52px);
}
@media (max-width:900px){
  .footer-top{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:560px){
  .footer-top{grid-template-columns:minmax(0,1fr)}
}

.footer-brand{
  display:flex;
  flex-direction:column;
  gap:10px;
  max-width:32em;
}
.footer-brand__name{
  font-size:16px;
  font-weight:700;
  letter-spacing:.05em;
  color:var(--ob-fog);
}
.footer-brand__tagline{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.14em;
  color:var(--ob-mint);
}
.footer-brand__note{
  font-size:14px;
  line-height:1.75;
  color:var(--ob-silver);
}

.footer-col{display:flex;flex-direction:column;gap:14px}
.footer-col__title{
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:400;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--ob-fog);
}
.footer-col__list{display:flex;flex-direction:column;gap:10px}
.footer-col__link{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-size:14.5px;
  color:var(--ob-silver);
  transition:color .2s var(--ob-ease),gap .2s var(--ob-ease);
}
.footer-col__link::before{
  content:"";
  width:14px;
  height:1px;
  flex:none;
  background:var(--ob-line);
  transition:background .2s var(--ob-ease),width .2s var(--ob-ease);
}
.footer-col__link:hover{color:var(--ob-fog);gap:14px}
.footer-col__link:hover::before{background:var(--ob-orange);width:22px}

.footer-contact{
  display:flex;
  flex-direction:column;
  gap:8px;
  margin-top:clamp(28px,4vw,48px);
  padding:18px clamp(16px,2.4vw,24px);
  border:1px solid var(--ob-line);
  border-left:3px solid var(--ob-orange);
  border-radius:0 var(--ob-radius) var(--ob-radius) 0;
  background:linear-gradient(100deg, rgba(255,139,61,.08), rgba(15,27,56,.6) 62%);
}
.footer-contact__line{
  font-family:var(--font-mono);
  font-size:13px;
  line-height:1.75;
  letter-spacing:.03em;
  color:var(--ob-fog);
  word-break:break-word;
}
.footer-contact__note{
  font-size:13px;
  line-height:1.7;
  color:var(--ob-silver);
}

.footer-legal{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px 24px;
  margin-top:clamp(28px,4vw,46px);
  padding-top:22px;
  border-top:1px solid var(--ob-line);
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.06em;
  color:var(--ob-silver);
}
.footer-legal__copy{color:var(--ob-silver)}
.footer-legal__icp{color:var(--ob-amber)}

/* ============================================================
   动效与可访问性
   ============================================================ */
.js [data-reveal]{
  opacity:0;
  transform:translateY(12px);
  transition:opacity .6s var(--ob-ease),transform .6s var(--ob-ease);
}
.js [data-reveal].is-visible{opacity:1;transform:none}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  .js [data-reveal]{opacity:1;transform:none}
  [data-section].is-live .section-no{transform:none}
  .scroll-progress{transition:none}
}