/* ============================================================
   /assets/site.css — 欧宝娱乐官网 共享外壳
   直角 · 精密网格 · 墨绿夜色 · 荧光柠檬绿
   ============================================================ */

:root{
  --ink:#07160F;
  --deep:#0E2A1E;
  --panel:#14392A;
  --lime:#C8FF3D;
  --mint:#3DE0B0;
  --red:#FF5B2E;
  --gold:#FFC24B;
  --text:#EAF4EC;
  --muted:#9DB8A8;
  --line:#2E4A3C;
  --light:#F3F7F2;
  --light-ink:#0B1F16;
  --light-muted:#41604F;

  --sans:"Inter","Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --mono:"JetBrains Mono","Sarasa Mono SC",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --score:"Archivo Black","Inter","Noto Sans SC","PingFang SC",system-ui,-apple-system,sans-serif;

  --shell-max:1360px;
  --gutter:clamp(18px,4.6vw,42px);
}

*,*::before,*::after{box-sizing:border-box}

html{
  -webkit-text-size-adjust:100%;
  text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:96px;
}

body{
  margin:0;
  min-height:100vh;
  font-family:var(--sans);
  font-size:16px;
  line-height:1.75;
  font-weight:400;
  color:var(--text);
  background-color:var(--ink);
  background-image:
    radial-gradient(1100px 680px at 88% -6%, rgba(200,255,61,.07), transparent 62%),
    radial-gradient(900px 620px at -10% 4%, rgba(61,224,176,.06), transparent 60%),
    linear-gradient(rgba(46,74,60,.24) 1px, transparent 1px),
    linear-gradient(90deg, rgba(46,74,60,.24) 1px, transparent 1px);
  background-size:auto,auto,80px 80px,80px 80px;
  background-repeat:no-repeat,no-repeat,repeat,repeat;
  background-position:top right,top left,0 0,0 0;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}

img,svg,video{display:block;max-width:100%}
h1,h2,h3,h4,p,figure,blockquote{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
button{font:inherit;color:inherit}
table{border-collapse:collapse}
[hidden]{display:none !important}

a{color:var(--mint);text-decoration:none}
a:hover{color:var(--lime)}

:focus-visible{
  outline:2px solid var(--lime);
  outline-offset:3px;
  box-shadow:0 0 0 4px rgba(7,22,15,.85);
}

::selection{background:var(--lime);color:var(--ink)}

/* ---------- 布局工具 ---------- */

.ob-shell{
  width:min(var(--shell-max), 100% - (var(--gutter) * 2));
  margin-inline:auto;
}

.ob-section{padding-block:clamp(56px,8vw,120px)}
.ob-section--light{background:var(--light);color:var(--light-ink)}
.ob-section--light .ob-lede,
.ob-section--light .ob-note,
.ob-section--light .ob-kicker{color:var(--light-muted)}
.ob-section--light a{color:#12664A}
.ob-section--light a:hover{color:#0B1F16}

.ob-grid{display:grid;gap:clamp(16px,2.4vw,28px)}
.ob-grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.ob-grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.ob-grid--4{grid-template-columns:repeat(4,minmax(0,1fr))}
.ob-grid--auto{grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}

.ob-prose{max-width:72ch}

/* ---------- 文字层级 ---------- */

.ob-kicker{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--mint);
}
.ob-kicker::before{content:"";width:22px;height:1px;background:currentColor}

.ob-display{
  font-size:clamp(40px,7vw,104px);
  font-weight:300;
  line-height:1.02;
  letter-spacing:-.02em;
  margin:0;
}

.ob-num{
  font-family:var(--score);
  font-size:clamp(96px,16vw,280px);
  font-weight:800;
  line-height:.82;
  letter-spacing:-.02em;
  color:var(--lime);
  font-variant-numeric:tabular-nums;
}

.ob-h2{
  font-size:clamp(26px,3.6vw,46px);
  font-weight:300;
  line-height:1.16;
  letter-spacing:-.01em;
}

.ob-h3{
  font-size:clamp(17px,1.6vw,21px);
  font-weight:500;
  line-height:1.4;
}

.ob-lede{
  font-size:clamp(15px,1.5vw,18px);
  color:var(--muted);
  max-width:64ch;
}

.ob-note{
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.05em;
  color:var(--muted);
}

/* ---------- 按钮 ---------- */

.ob-btn{
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:13px 22px;
  border:1px solid var(--lime);
  background:transparent;
  color:var(--lime);
  font-family:var(--mono);
  font-size:12.5px;
  letter-spacing:.1em;
  text-transform:uppercase;
  cursor:pointer;
  transition:background .18s ease,color .18s ease,transform .18s ease,border-color .18s ease;
}
.ob-btn:hover{background:var(--lime);color:var(--ink);transform:translateY(-2px)}

.ob-btn--solid{background:var(--lime);color:var(--ink)}
.ob-btn--solid:hover{background:transparent;color:var(--lime)}

.ob-btn--ghost{border-color:var(--line);color:var(--text)}
.ob-btn--ghost:hover{border-color:var(--lime);background:transparent;color:var(--lime)}

/* ---------- 卡片与标签 ---------- */

.ob-panel{
  position:relative;
  background:var(--panel);
  border:1px solid var(--line);
  padding:clamp(18px,2.4vw,28px);
  transition:transform .18s ease,border-color .18s ease;
}
.ob-panel:hover{transform:translateY(-2px);border-color:var(--lime)}

.ob-sticker{
  background:var(--panel);
  border:1px solid var(--line);
  border-left:3px solid var(--lime);
  padding:13px 16px;
  font-family:var(--mono);
  font-size:12.5px;
  line-height:1.7;
  letter-spacing:.02em;
  color:var(--muted);
}

.ob-strip{
  position:relative;
  margin-block:clamp(32px,5vw,64px);
  padding-block:clamp(18px,2.4vw,28px);
  background:var(--deep);
  border-left:3px solid var(--lime);
}
.ob-strip::after{
  content:"";
  position:absolute;
  inset:0;
  background-image:repeating-linear-gradient(120deg, rgba(200,255,61,.07) 0 2px, transparent 2px 14px);
  pointer-events:none;
}

.ob-chip{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 10px;
  border:1px solid var(--line);
  font-family:var(--mono);
  font-size:11px;
  letter-spacing:.08em;
  text-transform:uppercase;
  color:var(--muted);
}
.ob-chip--lime{border-color:var(--lime);color:var(--lime)}
.ob-chip--mint{border-color:var(--mint);color:var(--mint)}
.ob-chip--red{border-color:var(--red);color:var(--red)}
.ob-chip--gold{border-color:var(--gold);color:var(--gold)}

/* ---------- 面包屑 ---------- */

.ob-breadcrumb{font-family:var(--mono);font-size:11.5px;letter-spacing:.06em;color:var(--muted)}
.ob-breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.ob-breadcrumb li{display:flex;align-items:center;gap:8px}
.ob-breadcrumb li + li::before{content:"/";color:var(--line)}
.ob-breadcrumb a{color:var(--muted)}
.ob-breadcrumb a:hover{color:var(--lime)}
.ob-breadcrumb [aria-current="page"]{color:var(--text)}

/* ---------- 表格 ---------- */

.ob-table{
  width:100%;
  border-collapse:collapse;
  font-variant-numeric:tabular-nums;
}
.ob-table th,
.ob-table td{
  padding:11px 14px;
  text-align:left;
  border-bottom:1px solid var(--line);
  font-size:14.5px;
}
.ob-table thead th{
  font-family:var(--mono);
  font-size:11.5px;
  font-weight:500;
  letter-spacing:.08em;
  text-transform:uppercase;
  color:var(--muted);
  border-bottom:1px solid var(--mint);
  white-space:nowrap;
}
.ob-table tbody tr{transition:background .16s ease}
.ob-table tbody tr:hover{background:rgba(200,255,61,.05)}

/* ---------- 图片容器基础规则 ---------- */

.ob-media{
  position:relative;
  display:block;
  overflow:hidden;
  aspect-ratio:16/10;
  background:var(--panel);
  border:1px solid var(--line);
  isolation:isolate;
}
.ob-media::before{
  content:"";
  position:absolute;
  inset:0;
  z-index:0;
  background-image:repeating-linear-gradient(135deg, rgba(61,224,176,.09) 0 2px, transparent 2px 12px);
}
.ob-media > img,
.ob-media > svg,
.ob-media > picture{
  position:relative;
  z-index:1;
  display:block;
  width:100%;
  height:100%;
  object-fit:cover;
  filter:contrast(1.1) saturate(1.06) brightness(.94);
}
.ob-media__cap{
  position:absolute;
  left:0;
  bottom:0;
  z-index:2;
  padding:6px 12px;
  background:var(--ink);
  border-top:1px solid var(--line);
  border-right:1px solid var(--line);
  font-family:var(--mono);
  font-size:11px;
  letter-spacing:.06em;
  color:var(--muted);
}
.ob-media__num{
  position:absolute;
  right:10px;
  top:0;
  z-index:2;
  font-family:var(--score);
  font-size:clamp(44px,7vw,88px);
  font-weight:800;
  line-height:1;
  letter-spacing:-.04em;
  color:rgba(200,255,61,.22);
}
.ob-media--tall{aspect-ratio:3/4}
.ob-media--wide{aspect-ratio:21/9}
.ob-media--square{aspect-ratio:1/1}

/* ---------- 标签页 ---------- */

.ob-tabs{
  display:flex;
  flex-wrap:wrap;
  border-bottom:1px solid var(--line);
}
.ob-tab{
  appearance:none;
  background:transparent;
  border:0;
  border-bottom:2px solid transparent;
  padding:12px 16px;
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--muted);
  cursor:pointer;
  transition:color .18s ease,border-color .18s ease;
}
.ob-tab:hover{color:var(--text)}
.ob-tab[aria-selected="true"]{color:var(--lime);border-bottom-color:var(--lime)}
.ob-tabpanel{padding-top:clamp(16px,2.4vw,28px)}
.ob-tabpanel[hidden]{display:none}

/* ---------- 检索筛选 ---------- */

.ob-filter{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:12px;
  margin-bottom:18px;
}
.ob-filter__input{
  flex:1 1 240px;
  min-width:0;
  padding:11px 14px;
  background:var(--panel);
  border:1px solid var(--line);
  color:var(--text);
  font-family:var(--mono);
  font-size:13px;
}
.ob-filter__input::placeholder{color:var(--muted)}
.ob-filter__input:focus-visible{border-color:var(--lime)}
.ob-filter__count{
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--lime);
  white-space:nowrap;
}
.ob-filter [data-filter-item][hidden]{display:none}

/* ============================================================
   页头
   ============================================================ */

.ob-skip{
  position:fixed;
  top:-140px;
  left:max(12px,2vw);
  z-index:200;
  padding:10px 16px;
  background:var(--lime);
  color:var(--ink);
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.1em;
  transition:top .18s ease;
}
.ob-skip:focus{top:12px;color:var(--ink)}

.ob-header{
  position:sticky;
  top:0;
  z-index:80;
  background:rgba(7,22,15,.94);
  border-bottom:1px solid var(--line);
  -webkit-backdrop-filter:blur(8px);
  backdrop-filter:blur(8px);
}
.ob-header[data-condensed="true"]{box-shadow:0 14px 34px rgba(0,0,0,.45)}

.ob-progress{
  position:absolute;
  left:0;
  bottom:-1px;
  height:2px;
  width:0;
  z-index:3;
  background-image:linear-gradient(90deg,var(--mint),var(--lime));
}

.ob-topline{
  background:var(--deep);
  border-bottom:1px solid var(--line);
  overflow:hidden;
  max-height:76px;
  opacity:1;
  transition:max-height .26s ease,opacity .2s ease;
}
.ob-header[data-condensed="true"] .ob-topline{max-height:0;opacity:0}

.ob-topline__inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  min-height:46px;
  padding-block:5px;
}

.ob-brandline{
  margin:0;
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--muted);
}

.ob-topline__meta{display:flex;align-items:center;gap:16px}

.ob-tag{
  display:inline-flex;
  align-items:center;
  gap:7px;
  padding:4px 9px;
  border:1px solid var(--line);
  font-family:var(--mono);
  font-size:11px;
  letter-spacing:.1em;
  text-transform:uppercase;
  color:var(--muted);
  white-space:nowrap;
}
.ob-tag b{color:var(--lime);font-weight:600;letter-spacing:.04em}

.ob-quiet-link{
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--muted);
  padding-bottom:2px;
  border-bottom:1px solid transparent;
  transition:color .18s ease,border-color .18s ease;
}
.ob-quiet-link:hover{color:var(--lime);border-bottom-color:var(--lime)}

.ob-cta{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:7px 14px;
  background:var(--lime);
  color:var(--ink);
  border:1px solid var(--lime);
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.08em;
  text-transform:uppercase;
  white-space:nowrap;
  transition:background .18s ease,color .18s ease,transform .18s ease;
}
.ob-cta:hover{background:transparent;color:var(--lime);transform:translateY(-2px)}

.ob-nav__inner{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  min-height:66px;
}

.ob-brand{display:flex;align-items:center;gap:11px;color:var(--text)}
.ob-brand:hover{color:var(--text)}
.ob-brand__num{
  font-family:var(--score);
  font-size:30px;
  font-weight:800;
  line-height:1;
  letter-spacing:-.04em;
  color:var(--lime);
  font-variant-numeric:tabular-nums;
}
.ob-brand__text{
  display:flex;
  flex-direction:column;
  font-size:15px;
  font-weight:600;
  line-height:1.25;
  letter-spacing:.02em;
}
.ob-brand__sub{
  font-family:var(--mono);
  font-size:10px;
  font-weight:400;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--muted);
}

.ob-nav__list{display:flex;align-items:center;gap:2px}

.ob-nav__link{
  position:relative;
  display:block;
  padding:10px 13px;
  font-size:14px;
  letter-spacing:.02em;
  color:var(--text);
  transition:color .18s ease;
}
.ob-nav__link::after{
  content:"";
  position:absolute;
  left:13px;
  right:13px;
  bottom:5px;
  height:2px;
  background:var(--lime);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .2s ease;
}
.ob-nav__link:hover{color:var(--lime)}
.ob-nav__link:hover::after,
.ob-nav__link[aria-current="page"]::after{transform:scaleX(1)}
.ob-nav__link[aria-current="page"]{color:var(--lime)}

.ob-nav__idx{
  margin-right:7px;
  font-family:var(--mono);
  font-size:10px;
  letter-spacing:.06em;
  color:var(--muted);
  vertical-align:1px;
}
.ob-nav__link:hover .ob-nav__idx,
.ob-nav__link[aria-current="page"] .ob-nav__idx{color:var(--mint)}

.ob-nav__toggle{
  display:none;
  align-items:center;
  gap:9px;
  padding:9px 13px;
  background:transparent;
  border:1px solid var(--line);
  color:var(--text);
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.1em;
  text-transform:uppercase;
  cursor:pointer;
  transition:border-color .18s ease,color .18s ease;
}
.ob-nav__toggle:hover{border-color:var(--lime);color:var(--lime)}

.ob-nav__toggle-bars{position:relative;display:inline-block;width:14px;height:9px}
.ob-nav__toggle-bars::before,
.ob-nav__toggle-bars::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  height:1px;
  background:currentColor;
  transition:transform .2s ease;
}
.ob-nav__toggle-bars::before{top:0}
.ob-nav__toggle-bars::after{bottom:0}
.ob-nav__toggle[aria-expanded="true"] .ob-nav__toggle-bars::before{transform:translateY(4px) rotate(45deg)}
.ob-nav__toggle[aria-expanded="true"] .ob-nav__toggle-bars::after{transform:translateY(-4px) rotate(-45deg)}

.ob-totop{
  position:fixed;
  right:clamp(14px,3vw,32px);
  bottom:clamp(14px,3vw,32px);
  z-index:90;
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:11px 14px;
  background:var(--panel);
  color:var(--lime);
  border:1px solid var(--line);
  font-family:var(--mono);
  font-size:11.5px;
  letter-spacing:.1em;
  cursor:pointer;
  opacity:0;
  visibility:hidden;
  transform:translateY(6px);
  transition:opacity .2s ease,visibility .2s ease,transform .2s ease,border-color .2s ease,background .2s ease;
}
.ob-totop[data-visible="true"]{opacity:1;visibility:visible;transform:translateY(0)}
.ob-totop:hover{border-color:var(--lime);background:var(--deep)}

/* ============================================================
   页脚
   ============================================================ */

.ob-footer{
  position:relative;
  margin-top:clamp(64px,9vw,140px);
  background:var(--deep);
  border-top:1px solid var(--line);
}
.ob-footer::before{
  content:"";
  position:absolute;
  left:0;
  top:-1px;
  width:clamp(80px,18vw,260px);
  height:3px;
  background:var(--lime);
}
.ob-footer__inner{padding-block:clamp(44px,6vw,80px)}

.ob-footer__mast{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  gap:8px 20px;
  padding-bottom:clamp(24px,3vw,40px);
  border-bottom:1px solid var(--line);
}
.ob-footer__brand{
  font-size:clamp(22px,2.6vw,30px);
  font-weight:600;
  letter-spacing:.02em;
}
.ob-footer__tag{
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.1em;
  color:var(--muted);
}

.ob-footer__grid{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:clamp(18px,3vw,40px);
  padding-block:clamp(28px,4vw,48px);
}

.ob-fcol__title{
  display:flex;
  align-items:baseline;
  gap:8px;
  margin-bottom:14px;
  padding-bottom:10px;
  border-bottom:1px solid var(--line);
  font-size:15px;
  font-weight:600;
}
.ob-fcol__num{
  font-family:var(--mono);
  font-size:11px;
  letter-spacing:.08em;
  color:var(--lime);
}
.ob-fcol__list li + li{margin-top:9px}
.ob-fcol__list a{
  font-size:14px;
  color:var(--muted);
  transition:color .18s ease;
}
.ob-fcol__list a:hover{color:var(--lime)}

.ob-footer__contact{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(220px,1fr));
  gap:12px 28px;
  padding:clamp(18px,2.4vw,26px);
  border:1px solid var(--line);
  background:var(--panel);
}
.ob-cell{
  font-family:var(--mono);
  font-size:12px;
  line-height:1.6;
  letter-spacing:.04em;
  color:var(--muted);
}
.ob-cell strong{
  display:block;
  margin-top:2px;
  font-family:var(--sans);
  font-size:13px;
  font-weight:500;
  letter-spacing:0;
  color:var(--text);
  word-break:break-word;
}
.ob-footnote{
  grid-column:1 / -1;
  margin-top:4px;
  padding-top:12px;
  border-top:1px solid var(--line);
  font-family:var(--mono);
  font-size:12px;
  line-height:1.7;
  color:var(--muted);
}

.ob-footer__legal{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:12px 24px;
  margin-top:clamp(24px,3vw,36px);
  padding-top:18px;
  border-top:1px solid var(--line);
}
.ob-legal-list{display:flex;flex-wrap:wrap;gap:8px 20px}
.ob-legal-list a{
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--muted);
}
.ob-legal-list a:hover{color:var(--lime)}
.ob-icp,
.ob-copy{
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.04em;
  color:var(--muted);
}
.ob-copy{margin-left:auto}

/* ============================================================
   响应式
   ============================================================ */

@media (max-width:1000px){
  .ob-grid--4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .ob-footer__grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}

@media (max-width:1024px){
  .ob-nav__toggle{display:inline-flex}
  .ob-nav__list{
    display:none;
    flex-basis:100%;
    flex-direction:column;
    align-items:stretch;
    gap:0;
    margin-top:12px;
    padding:6px 0 14px;
    border-top:1px solid var(--line);
  }
  .ob-nav[data-open="true"] .ob-nav__list{display:flex}
  .ob-nav__link{
    padding:13px 2px;
    font-size:15px;
    border-bottom:1px solid rgba(46,74,60,.5);
  }
  .ob-nav__link::after{left:0;right:auto;bottom:-1px;width:34px}
}

@media (max-width:820px){
  .ob-topline__inner{flex-wrap:wrap;gap:10px 14px}
  .ob-tag{display:none}
  .ob-brandline{
    width:100%;
    font-size:11px;
    white-space:nowrap;
    overflow:hidden;
    text-overflow:ellipsis;
  }
}

@media (max-width:760px){
  .ob-grid--2,
  .ob-grid--3,
  .ob-grid--4,
  .ob-grid--auto{grid-template-columns:minmax(0,1fr)}
  .ob-footer__grid{grid-template-columns:minmax(0,1fr)}
  .ob-copy{margin-left:0}
  .ob-totop{padding:10px 12px}
  .ob-totop span:not([aria-hidden]){display:none}
}

@media (max-width:560px){
  .ob-footer__contact{grid-template-columns:minmax(0,1fr)}
  .ob-cta{padding:6px 11px;font-size:11px}
  .ob-brand__num{font-size:26px}
}

/* ============================================================
   动效降级
   ============================================================ */

@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,
  *::before,
  *::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .ob-panel:hover,
  .ob-btn:hover,
  .ob-cta:hover,
  .ob-totop:hover{transform:none}
}