/* 888电子投注中心 · 共享站点样式 /assets/site.css
   内容：reset / 设计令牌 / 中文排版 / 页头 / 页脚 / 通用按钮与组件 / 响应式 */

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;background-color:#07202E}
body{margin:0}
h1,h2,h3,h4,h5,h6,p,ul,ol,dl,dd,figure,blockquote,pre{margin:0}
ul,ol{padding:0;list-style:none}
img,svg,video{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
table{border-collapse:collapse;width:100%}
:focus-visible{outline:2px solid var(--cyan-400);outline-offset:2px;border-radius:4px}

:root{
  /* —— 色板 —— */
  --ink-950:#04121C;
  --sea-900:#07202E;
  --sea-800:#0C2C3E;
  --sea-700:#144257;
  --paper-050:#F3F7F9;
  --paper-000:#FFFFFF;
  --cyan-400:#35E0D6;
  --cyan-700:#0B6E6B;
  --coral-500:#FF6B4A;
  --amber-300:#FFC36B;
  --slate-500:#5A6E7C;
  --grid-cyan:rgba(53,224,214,.16);
  --ink-100:#E7F2F6;
  --ink-200:#BDD5E0;
  --muted:#93AEBD;
  --line-glass:rgba(53,224,214,.22);
  --line-soft:rgba(53,224,214,.12);
  --glass:rgba(12,44,62,.72);
  --glass-soft:rgba(20,66,87,.42);
  /* —— 字体 —— */
  --font-display:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-body:var(--font-display);
  --font-mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,"Noto Sans Mono CJK SC","Courier New",monospace;
  /* —— 尺度与节奏 —— */
  --shell:1320px;
  --gap:24px;
  --cut:0 18px 0 18px;
  --shadow-card:0 12px 28px -18px rgba(0,0,0,.85);
  --shadow-float:0 26px 52px -32px rgba(0,0,0,.95);
  --ease:cubic-bezier(.22,.61,.36,1);
  --dur:.6s;
}

body{
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.75;
  color:var(--ink-100);
  background-color:var(--sea-900);
  background-image:
    radial-gradient(1100px 620px at 78% -12%,rgba(53,224,214,.14),transparent 62%),
    radial-gradient(820px 520px at -6% 18%,rgba(255,107,74,.08),transparent 62%),
    linear-gradient(rgba(53,224,214,.07) 1px,transparent 1px),
    linear-gradient(90deg,rgba(53,224,214,.07) 1px,transparent 1px);
  background-size:auto,auto,96px 96px,96px 96px;
  background-attachment:fixed,fixed,fixed,fixed;
  background-repeat:no-repeat,no-repeat,repeat,repeat;
}

/* —— 基础排版 —— */
h1,h2,h3,h4{font-weight:700;line-height:1.28;color:#fff}
p{color:var(--ink-100)}
strong{color:#fff}
.mono{font-family:var(--font-mono);font-weight:500;letter-spacing:.04em}
.display-xl{font-family:var(--font-display);font-weight:900;letter-spacing:.04em;line-height:1.02;font-size:clamp(2.6rem,7vw,6.5rem);color:#fff}
.eyebrow{font-family:var(--font-mono);font-size:.8125rem;letter-spacing:.14em;color:var(--cyan-400);text-transform:uppercase}
.lead{font-size:1.125rem;color:var(--ink-200);line-height:1.7}
.prose{max-width:68ch}
.prose p+p{margin-top:1em}
.prose h2{font-size:clamp(1.25rem,2vw,1.6rem);margin:1.8em 0 .6em}
.prose h3{font-size:1.125rem;margin:1.5em 0 .5em}
.divider{height:1px;background:linear-gradient(90deg,var(--line-glass),transparent);border:0;margin:28px 0}
.surface-paper{background:var(--paper-050);color:#0A2635}
.surface-paper p,.surface-paper li{color:#123647}

/* —— 布局容器 —— */
.container{width:100%;max-width:var(--shell);margin-inline:auto;padding-inline:clamp(16px,4vw,40px)}
.container--wide{max-width:1560px}
.site-main{position:relative;z-index:1;padding-bottom:clamp(48px,7vw,96px)}
[id]{scroll-margin-top:132px}

.grid{display:grid;gap:var(--gap)}
.grid-12{grid-template-columns:repeat(12,minmax(0,1fr))}
.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.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}
.layout-split{display:grid;grid-template-columns:minmax(0,3fr) minmax(0,8fr);gap:clamp(24px,3vw,48px);align-items:start}
.split-aside{position:sticky;top:132px}
.split-main{min-width:0}

/* —— 跳转链接 —— */
.skip-link{
  position:fixed;left:16px;top:-80px;z-index:200;
  padding:.7rem 1.1rem;border-radius:var(--cut);
  background:var(--cyan-400);color:#04222A;font-weight:700;font-size:.9375rem;
  transition:top .22s var(--ease);
}
.skip-link:focus{top:14px}

/* —— 页头 —— */
.site-header{
  position:sticky;top:0;z-index:80;
  padding:.7rem 0 .85rem;
  background:linear-gradient(180deg,rgba(7,32,46,.96),rgba(7,32,46,.72) 62%,rgba(7,32,46,0));
}
.header-shell{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px 16px;
  padding:.55rem .65rem .55rem .75rem;
  border:1px solid var(--line-glass);border-radius:26px;
  background:var(--glass);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
  backdrop-filter:blur(18px) saturate(140%);
  box-shadow:var(--shadow-float);
}
.brand-island{display:flex;align-items:center;gap:12px}
.brand{display:inline-flex;align-items:center;gap:12px;padding:4px;border-radius:16px}
.brand-mark{
  display:grid;place-items:center;flex:0 0 auto;
  width:46px;height:46px;border-radius:var(--cut);
  font-size:.9375rem;
  color:var(--ink-950);background:linear-gradient(140deg,var(--cyan-400),#1FA9A2);
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.28);
}
.brand-text{display:flex;flex-direction:column;line-height:1.25}
.brand-name{font-weight:700;font-size:1.0625rem;letter-spacing:.04em;color:#fff}
.brand-sub{font-size:.75rem;color:var(--muted);letter-spacing:.08em}
.nav-toggle{
  display:none;align-items:center;gap:8px;
  padding:.5rem .8rem;border:1px solid var(--line-glass);border-radius:999px;
  color:var(--ink-100);font-size:.8125rem;
}
.nav-toggle-bars{display:inline-flex;flex-direction:column;gap:4px;width:16px}
.nav-toggle-bar{display:block;height:2px;width:100%;background:var(--cyan-400);border-radius:2px;transition:transform .25s var(--ease),opacity .25s var(--ease)}
.nav-toggle-label{letter-spacing:.1em}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:first-child{transform:translateY(3px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:last-child{transform:translateY(-3px) rotate(-45deg)}
.site-nav{display:flex;align-items:center;gap:6px;margin-left:auto}
.nav-list{display:flex;align-items:center;gap:2px}
.nav-link{
  display:inline-block;padding:.5rem .8rem;border-radius:999px;
  font-size:.9375rem;color:var(--ink-200);
  transition:background .2s var(--ease),color .2s var(--ease),box-shadow .2s var(--ease);
}
.nav-link:hover{background:rgba(53,224,214,.1);color:#fff}
.nav-link[aria-current="page"]{
  background:rgba(53,224,214,.14);color:var(--cyan-400);
  box-shadow:inset 0 0 0 1px var(--line-glass);
}
.nav-cta{display:none}
.header-actions{margin-left:6px;display:flex;align-items:center}
.tag-strip{
  display:flex;align-items:center;gap:12px;
  margin-top:10px;padding:6px 8px 6px 14px;
  border:1px solid var(--line-soft);border-radius:999px;
  background:rgba(4,18,28,.56);
  overflow-x:auto;scrollbar-width:thin;
}
.tag-strip-label{flex:0 0 auto;font-size:.75rem;color:var(--slate-500);letter-spacing:.18em}
.tag-list{display:flex;align-items:center;gap:8px}
.tag{
  display:inline-block;white-space:nowrap;
  padding:.28rem .72rem;border:1px dashed rgba(53,224,214,.3);border-radius:999px;
  font-size:.8125rem;color:var(--ink-200);
  transition:border-color .2s var(--ease),color .2s var(--ease),background .2s var(--ease);
}
.tag:hover{border-color:var(--cyan-400);color:var(--cyan-400);background:rgba(53,224,214,.08)}
.scroll-meter{position:absolute;left:0;right:0;bottom:0;height:2px;background:rgba(53,224,214,.1)}
.scroll-meter-fill{
  display:block;height:100%;width:100%;
  transform:scaleX(0);transform-origin:0 50%;
  background:linear-gradient(90deg,var(--cyan-700),var(--cyan-400) 62%,var(--coral-500));
}

/* —— 页脚 —— */
.site-footer{
  position:relative;z-index:1;
  margin-top:clamp(40px,6vw,80px);
  border-top:1px solid var(--line-soft);
  background:linear-gradient(180deg,rgba(4,18,28,.55),rgba(4,18,28,.92));
}
.footer-shell{
  display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,1fr);
  gap:clamp(28px,4vw,56px);
  padding:clamp(32px,5vw,60px) 0;
}
.footer-brand{max-width:52ch}
.brand--footer{margin-bottom:14px}
.footer-note{color:var(--ink-200);font-size:.9375rem;line-height:1.7}
.footer-meta{display:grid;gap:10px;margin-top:20px}
.footer-meta-row{display:grid;grid-template-columns:80px minmax(0,1fr);gap:12px;align-items:baseline}
.footer-meta-row dt{font-size:.75rem;color:var(--slate-500);letter-spacing:.1em}
.footer-meta-row dd{font-size:.9375rem;color:var(--ink-100);word-break:break-word}
.copy-btn{
  margin-left:.5rem;padding:.12rem .5rem;
  border:1px solid var(--line-glass);border-radius:999px;
  font-size:.6875rem;color:var(--ink-200);
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}
.copy-btn:hover{color:var(--cyan-400);border-color:var(--cyan-400)}
.copy-btn[data-copied="true"]{background:var(--cyan-400);color:#04222A;border-color:var(--cyan-400)}
.footer-cols{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
.footer-col-title{font-size:.8125rem;font-weight:500;letter-spacing:.16em;color:var(--slate-500);margin-bottom:12px}
.footer-links{display:grid;gap:6px}
.footer-link{
  display:inline-block;padding:.2rem 0;
  font-size:.9375rem;color:var(--ink-200);
  transition:color .2s var(--ease),transform .2s var(--ease);
}
.footer-link:hover{color:var(--cyan-400);transform:translateX(3px)}
.footer-strip{
  position:relative;overflow:hidden;
  display:flex;flex-wrap:wrap;gap:8px 24px;justify-content:space-between;align-items:center;
  padding:18px 22px;margin-bottom:20px;
  border:1px solid var(--line-glass);border-radius:var(--cut);
  background:linear-gradient(180deg,rgba(12,44,62,.9),rgba(4,18,28,.92));
}
.footer-strip p{position:relative;z-index:1}
.footer-legal{font-size:.8125rem;color:var(--ink-200)}
.footer-markers{font-size:.8125rem;color:var(--muted);display:inline-flex;align-items:center}
.footer-skyline{
  position:absolute;left:0;right:0;bottom:0;height:52px;pointer-events:none;
  background:var(--sea-700);opacity:.5;
  clip-path:polygon(0% 100%,0% 62%,6% 62%,6% 40%,10% 40%,10% 72%,15% 72%,15% 30%,19% 30%,19% 56%,24% 56%,24% 46%,28% 46%,28% 78%,33% 78%,33% 34%,37% 34%,37% 60%,42% 60%,42% 50%,47% 50%,47% 24%,52% 24%,52% 64%,57% 64%,57% 42%,62% 42%,62% 70%,67% 70%,67% 32%,72% 32%,72% 54%,77% 54%,77% 38%,82% 38%,82% 68%,87% 68%,87% 30%,92% 30%,92% 58%,97% 58%,97% 76%,100% 76%,100% 100%);
}
.status-dot{
  display:inline-block;width:8px;height:8px;margin-right:8px;border-radius:50%;
  background:var(--cyan-400);box-shadow:0 0 0 4px rgba(53,224,214,.16);
  animation:pulse 2.4s var(--ease) infinite;
}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.45}}

/* —— 按钮 —— */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.5em;
  padding:.72rem 1.15rem;border:1px solid transparent;border-radius:999px;
  font-weight:600;font-size:.9375rem;line-height:1;
  transition:transform .2s var(--ease),filter .2s var(--ease),background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}
.btn-primary{
  background:linear-gradient(135deg,var(--cyan-400),#1BB3AB);
  color:#04222A;box-shadow:0 12px 26px -16px rgba(53,224,214,.95);
}
.btn-primary:hover{filter:brightness(1.07);transform:translateY(-1px)}
.btn-ghost{border-color:var(--line-glass);background:rgba(53,224,214,.06);color:var(--ink-100)}
.btn-ghost:hover{border-color:var(--cyan-400);color:#fff}
.btn-coral{background:var(--coral-500);color:#2A0A02}
.btn-sm{padding:.55rem .9rem;font-size:.875rem}

/* —— 章节骨架 —— */
.section{padding-block:clamp(32px,4.5vw,64px)}
.section-head{margin-bottom:clamp(20px,3vw,36px)}
.section-head .eyebrow{display:inline-block;margin-bottom:10px}
.section-num{
  display:inline-block;margin-right:.75em;
  font-family:var(--font-mono);font-size:.8125rem;letter-spacing:.16em;
  color:var(--cyan-400);vertical-align:middle;
}
.section-title{font-size:clamp(1.35rem,2.4vw,2rem);letter-spacing:.01em}
.section-lead{margin-top:12px;max-width:66ch;color:var(--ink-200)}

/* —— 面板 —— */
.panel{
  position:relative;
  padding:clamp(18px,2.2vw,26px);
  border:1px solid var(--line-glass);border-radius:var(--cut);
  background:var(--sea-800);box-shadow:var(--shadow-card);
}
.panel--glass{
  background:var(--glass);
  -webkit-backdrop-filter:blur(14px) saturate(130%);
  backdrop-filter:blur(14px) saturate(130%);
}
.panel--paper{background:var(--paper-050);color:#0A2635;border-color:rgba(11,110,107,.2)}
.panel--paper p,.panel--paper li{color:#123647}
.panel-head{display:flex;flex-wrap:wrap;align-items:baseline;gap:8px 14px;margin-bottom:14px}
.panel-kicker{font-family:var(--font-mono);font-size:.75rem;letter-spacing:.16em;color:var(--slate-500)}
.panel-title{font-size:clamp(1.05rem,1.6vw,1.35rem)}

/* —— 读数与刻度 —— */
.readout{
  display:grid;gap:6px;padding:18px 20px;
  border:1px solid var(--line-glass);border-radius:var(--cut);
  background:var(--paper-000);color:#0A2635;
  box-shadow:var(--shadow-float);
}
.readout-label{font-family:var(--font-mono);font-size:.75rem;letter-spacing:.14em;color:var(--cyan-700)}
.readout-value{font-family:var(--font-mono);font-weight:500;font-size:clamp(1.9rem,3.4vw,2.9rem);line-height:1.05;color:#07202E}
.readout-unit{font-family:var(--font-mono);font-size:.8125rem;color:var(--slate-500);margin-left:.4em}
.tick-bar{height:6px;border-radius:999px;background:rgba(53,224,214,.14);overflow:hidden}
.tick-bar-fill{display:block;height:100%;width:var(--tick,50%);background:linear-gradient(90deg,var(--cyan-700),var(--cyan-400));transition:width .6s var(--ease)}

/* —— 标签、徽标 —— */
.chip-row{display:flex;flex-wrap:wrap;gap:8px}
.chip{
  padding:.35rem .85rem;border:1px solid var(--line-glass);border-radius:999px;
  font-size:.8125rem;color:var(--ink-200);background:rgba(53,224,214,.05);
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}
.chip:hover{border-color:var(--cyan-400);color:var(--cyan-400)}
.chip[aria-pressed="true"]{background:var(--cyan-400);color:#04222A;border-color:var(--cyan-400)}
.badge{
  display:inline-block;padding:.15rem .55rem;border:1px solid var(--line-glass);border-radius:6px;
  font-family:var(--font-mono);font-size:.6875rem;letter-spacing:.1em;color:var(--ink-200);
}
.badge--coral{border-color:rgba(255,107,74,.5);color:var(--coral-500);background:rgba(255,107,74,.1)}
.badge--amber{border-color:rgba(255,195,107,.5);color:var(--amber-300);background:rgba(255,195,107,.1)}

/* —— 面包屑与目录 —— */
.breadcrumb{display:flex;flex-wrap:wrap;gap:6px;font-family:var(--font-mono);font-size:.8125rem;color:var(--muted)}
.breadcrumb li+li::before{content:"/";margin-right:6px;color:rgba(53,224,214,.5)}
.breadcrumb a{color:var(--ink-200)}
.breadcrumb a:hover{color:var(--cyan-400)}
.breadcrumb [aria-current="page"]{color:var(--cyan-400)}
.toc{padding:18px 16px;border:1px solid var(--line-soft);border-radius:var(--cut);background:rgba(12,44,62,.5)}
.toc-title{font-family:var(--font-mono);font-size:.75rem;letter-spacing:.18em;color:var(--slate-500);margin-bottom:12px}
.toc-list{display:grid;gap:4px}
.toc-link{
  display:block;padding:.4rem .55rem;border-left:2px solid transparent;border-radius:0 10px 0 10px;
  font-size:.875rem;color:var(--ink-200);
  transition:color .2s var(--ease),background .2s var(--ease),border-color .2s var(--ease);
}
.toc-link:hover{color:#fff;background:rgba(53,224,214,.08)}
.toc-link[aria-current="true"]{color:var(--cyan-400);border-left-color:var(--cyan-400);background:rgba(53,224,214,.1)}

/* —— 清单与动作 —— */
.list-check{display:grid;gap:8px}
.list-check li{position:relative;padding-left:22px;color:var(--ink-200)}
.list-check li::before{
  content:"";position:absolute;left:0;top:.72em;width:10px;height:2px;
  background:var(--cyan-400);border-radius:2px;
}
.action-row{display:flex;flex-wrap:wrap;gap:12px;align-items:center;margin-top:24px}
.action-link{
  display:inline-flex;align-items:center;gap:.4em;
  font-family:var(--font-mono);font-size:.875rem;color:var(--cyan-400);
  border-bottom:1px solid rgba(53,224,214,.4);
  transition:border-color .2s var(--ease),color .2s var(--ease);
}
.action-link:hover{border-color:var(--cyan-400);color:#fff}

/* —— 图片容器（页面阶段放置 img 即可） —— */
.img-frame{
  position:relative;overflow:hidden;aspect-ratio:4/3;
  border:1px solid var(--line-glass);border-radius:var(--cut);
  background:linear-gradient(140deg,var(--sea-700),var(--sea-800) 58%,var(--ink-950));
}
.img-frame--wide{aspect-ratio:16/9}
.img-frame--square{aspect-ratio:1/1}
.img-frame--tall{aspect-ratio:3/4}
.img-frame > img{width:100%;height:100%;object-fit:cover}
.img-frame::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(180deg,transparent 48%,rgba(4,18,28,.6));
}
.img-frame--plain::after{display:none}
.img-frame::before{
  content:"";position:absolute;inset:0;pointer-events:none;z-index:1;
  background-image:linear-gradient(rgba(53,224,214,.12) 1px,transparent 1px),linear-gradient(90deg,rgba(53,224,214,.12) 1px,transparent 1px);
  background-size:44px 44px;opacity:.5;
}

/* —— 显现动效 —— */
.reveal{opacity:0;transform:translateY(18px);transition:opacity var(--dur) var(--ease),transform var(--dur) var(--ease)}
.reveal.is-visible{opacity:1;transform:none}

/* —— 响应式 —— */
@media (max-width:1180px){
  .nav-link{padding:.45rem .6rem;font-size:.875rem}
  .layout-split{grid-template-columns:minmax(0,1fr)}
  .split-aside{position:static}
}
@media (max-width:1024px){
  .col-3,.col-4,.col-6,.col-8,.col-9{grid-column:span 12}
  .grid-2,.grid-3{grid-template-columns:minmax(0,1fr)}
  .footer-shell{grid-template-columns:minmax(0,1fr)}
}
@media (max-width:940px){
  body{font-size:16px}
  .header-shell{border-radius:22px;padding:.5rem .6rem}
  .nav-toggle{display:inline-flex}
  .header-actions{display:none}
  .site-nav{
    flex-basis:100%;order:5;margin-left:0;
    flex-direction:column;align-items:stretch;gap:2px;
    max-height:0;opacity:0;visibility:hidden;overflow:hidden;
    border-top:1px solid transparent;padding-top:0;
    transition:max-height .35s var(--ease),opacity .25s var(--ease),visibility .25s var(--ease),padding-top .3s var(--ease);
  }
  .site-nav[data-open="true"]{
    max-height:560px;opacity:1;visibility:visible;
    border-top-color:var(--line-glass);padding-top:10px;
  }
  .nav-list{flex-direction:column;align-items:stretch;gap:2px}
  .nav-link{display:block;padding:.65rem .8rem;border-radius:12px}
  .nav-cta{display:inline-flex;margin-top:8px}
  .footer-meta-row{grid-template-columns:minmax(0,1fr)}
}
@media (max-width:640px){
  .brand-mark{width:40px;height:40px;font-size:.8125rem}
  .brand-name{font-size:1rem}
  .brand-sub{font-size:.6875rem}
  .tag-strip{padding:6px 8px 6px 12px;border-radius:16px}
  .footer-strip{padding:16px;border-radius:var(--cut)}
  .footer-cols{grid-template-columns:minmax(0,1fr)}
  .readout{padding:14px 16px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important}
  .reveal{opacity:1;transform:none}
  .status-dot{animation:none}
  .scroll-meter-fill{transition:none}
}