/* ==========================================================================
   8博体育主站 · 共享样式表  /assets/site.css
   夜场墨绿 + 电子青 + 琥珀入口色 · 侧边导览式布局 · 印刷纸张质感
   ========================================================================== */

/* ---------- 1. 变量 ---------- */
:root{
  --ink-900:#0A1E19;
  --ink-800:#122A23;
  --ink-700:#173229;
  --line:#1E3A31;
  --cyan:#38E1CF;
  --cyan-soft:#9BF4EA;
  --amber:#FFB63C;
  --amber-deep:#C98423;
  --paper:#F2F0E6;
  --muted:#93AAA3;
  --night:#050E0C;

  --rail-w:112px;
  --gutter:clamp(18px,4vw,56px);
  --maxw:1180px;
  --pill:999px;

  --font-display:"Helvetica Neue Condensed","Arial Narrow","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-heading:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-body:"Songti SC","SimSun","Noto Serif SC","Source Han Serif SC",Georgia,serif;
  --font-data:ui-monospace,"SFMono-Regular",Menlo,Consolas,"Liberation Mono","Courier New",monospace;

  --ease:cubic-bezier(.2,.7,.3,1);
  --dur:.24s;
}

/* ---------- 2. Reset ---------- */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  min-height:100vh;
  background:var(--ink-900);
  color:var(--paper);
  font-family:var(--font-body);
  font-size:1.0625rem;
  line-height:1.85;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4,h5,p,figure,blockquote,dl,dd{margin:0;}
ul,ol{margin:0;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;padding:0;cursor:pointer;}
table{border-collapse:collapse;width:100%;}
:focus-visible{outline:2px solid var(--cyan-soft);outline-offset:3px;border-radius:3px;}
::selection{background:var(--cyan);color:var(--night);}
.sr-only{
  position:absolute;width:1px;height:1px;padding:0;margin:-1px;
  overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0;
}

/* ---------- 3. 跳转链接 ---------- */
.skip-link{
  position:absolute;left:12px;top:-80px;z-index:300;
  padding:10px 18px;border-radius:var(--pill);
  background:var(--amber);color:var(--night);
  font-family:var(--font-heading);font-size:.875rem;font-weight:600;
  transition:top .18s var(--ease);
}
.skip-link:focus{top:12px;}

/* ---------- 4. 正文容器 ---------- */
.canvas{
  width:100%;
  max-width:var(--maxw);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.rule{height:1px;border:0;background:var(--line);margin:0;}

/* ---------- 5. 页头：品牌轨道 ---------- */
.site-header{position:relative;z-index:70;}

.brand-rail{
  position:fixed;inset:0 auto 0 0;width:var(--rail-w);z-index:65;
  display:flex;flex-direction:column;align-items:center;justify-content:space-between;
  padding:26px 0 24px;
  background:linear-gradient(180deg,var(--ink-900) 0%,var(--night) 100%);
  border-right:1px solid var(--line);
}

.rail-brand{display:flex;flex-direction:column;align-items:center;gap:14px;}
.rail-mark{
  position:relative;width:36px;height:36px;
  border:1px solid var(--line);
  background:linear-gradient(160deg,rgba(56,225,207,.10),rgba(10,30,25,0));
}
.rail-mark__dot{
  position:absolute;left:50%;top:42%;width:8px;height:8px;margin:-4px 0 0 -4px;
  border-radius:50%;background:var(--cyan);
}
.rail-mark__bar{position:absolute;left:6px;right:6px;bottom:7px;height:2px;background:var(--amber);}

.rail-brand__text{
  writing-mode:vertical-rl;text-orientation:upright;
  font-family:var(--font-display);font-weight:300;
  font-size:1.05rem;letter-spacing:.32em;color:var(--paper);
}
.rail-brand__sub{
  font-family:var(--font-heading);font-size:.625rem;letter-spacing:.24em;
  color:var(--muted);border:1px solid var(--line);border-radius:var(--pill);
  padding:3px 7px;
}

.rail-tagline{
  writing-mode:vertical-rl;
  font-family:var(--font-heading);font-size:.75rem;letter-spacing:.3em;
  color:var(--muted);
}

.rail-meter{display:flex;flex-direction:column;align-items:center;gap:12px;}
.rail-meter__track{
  position:relative;display:block;width:2px;height:88px;
  background:var(--line);overflow:hidden;
}
.rail-meter__fill{
  position:absolute;left:0;right:0;bottom:0;display:block;height:0%;
  background:linear-gradient(180deg,var(--cyan) 0%,var(--amber) 100%);
  transition:height .12s linear;
}
.rail-meter__label{
  writing-mode:vertical-rl;
  font-family:var(--font-heading);font-size:.625rem;letter-spacing:.22em;color:var(--muted);
}

/* ---------- 6. 悬浮胶囊导航 ---------- */
.nav-dock{
  position:fixed;top:16px;left:var(--rail-w);right:0;z-index:70;
  pointer-events:none;
}
.nav-dock__canvas{
  display:flex;justify-content:flex-end;align-items:center;
  pointer-events:none;
}
.nav-dock__panel{
  display:flex;align-items:center;gap:6px;
  padding:7px 8px 7px 16px;
  border:1px solid var(--line);
  border-radius:var(--pill);
  background:rgba(18,42,35,.86);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  box-shadow:0 20px 44px -30px #000;
  pointer-events:auto;
}

.site-nav__list{display:flex;align-items:center;gap:2px;}
.site-nav__link{
  position:relative;display:inline-flex;align-items:center;gap:8px;
  padding:8px 13px;border-radius:var(--pill);
  font-family:var(--font-heading);font-size:.9375rem;letter-spacing:.02em;
  color:var(--muted);
  transition:color .18s var(--ease),background-color .18s var(--ease);
}
.site-nav__link::before{
  content:"";width:5px;height:5px;border-radius:50%;
  background:var(--line);
  transition:background-color .18s var(--ease),box-shadow .18s var(--ease);
}
.site-nav__link:hover{color:var(--paper);background:rgba(56,225,207,.08);}
.site-nav__link[aria-current="page"]{
  color:var(--paper);
  background:rgba(56,225,207,.12);
}
.site-nav__link[aria-current="page"]::before{
  background:var(--amber);
  box-shadow:0 0 0 3px rgba(255,182,60,.18);
}

.nav-dock__actions{
  display:flex;align-items:center;gap:8px;
  margin-left:10px;padding-left:12px;border-left:1px solid var(--line);
}

/* ---------- 7. 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:10px 18px;border-radius:var(--pill);
  border:1px solid transparent;
  font-family:var(--font-heading);font-size:.9375rem;font-weight:500;
  letter-spacing:.04em;white-space:nowrap;
  transition:background-color .18s var(--ease),border-color .18s var(--ease),color .18s var(--ease);
}
.btn--solid{background:var(--amber);color:var(--night);font-weight:600;}
.btn--solid:hover{background:var(--amber-deep);}
.btn--solid:active{background:var(--amber-deep);}
.btn--ghost{border-color:var(--line);color:var(--paper);}
.btn--ghost:hover{border-color:var(--cyan);color:var(--cyan);}
.btn--block{width:100%;}

/* ---------- 8. 移动导航按钮 ---------- */
.nav-toggle{
  display:none;align-items:center;gap:10px;
  padding:9px 16px;border:1px solid var(--line);border-radius:var(--pill);
  background:rgba(18,42,35,.9);color:var(--paper);
  font-family:var(--font-heading);font-size:.8125rem;letter-spacing:.14em;
  pointer-events:auto;
}
.nav-toggle__bars{display:inline-flex;flex-direction:column;gap:4px;width:16px;}
.nav-toggle__bars i{display:block;height:1.5px;background:var(--cyan);transition:transform .18s var(--ease);}
.site-header[data-open] .nav-toggle{border-color:var(--amber);}
.site-header[data-open] .nav-toggle__bars i:first-child{transform:translateY(5.5px) rotate(45deg);}
.site-header[data-open] .nav-toggle__bars i:last-child{transform:translateY(-5.5px) rotate(-45deg);}

/* ---------- 9. 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(56px,9vw,120px);
  padding:clamp(48px,7vw,92px) 0 32px;
  background:linear-gradient(180deg,var(--ink-900) 0%,var(--night) 100%);
  border-top:1px solid var(--line);
}
.site-footer::before{
  content:"";position:absolute;left:0;top:-1px;width:clamp(80px,14vw,180px);height:2px;
  background:var(--amber);
}
.footer-top{
  display:grid;
  grid-template-columns:1.15fr 1.6fr 1.1fr;
  gap:clamp(28px,4vw,64px);
}
.footer-brand__mark{
  font-family:var(--font-display);font-weight:300;
  font-size:clamp(1.6rem,3vw,2.25rem);letter-spacing:.06em;line-height:1.2;
}
.footer-brand__tagline{
  margin-top:12px;color:var(--cyan);
  font-family:var(--font-heading);font-size:.8125rem;letter-spacing:.24em;
}
.footer-index{
  margin-top:20px;max-width:26ch;color:var(--muted);font-size:.9375rem;line-height:1.9;
}
.footer-groups{display:grid;grid-template-columns:1fr 1fr;gap:clamp(20px,3vw,40px);}
.footer-group__title{
  margin-bottom:18px;color:var(--muted);
  font-family:var(--font-heading);font-size:.75rem;font-weight:500;letter-spacing:.18em;
}
.footer-list{display:flex;flex-direction:column;gap:11px;}
.footer-list a{
  font-family:var(--font-heading);font-size:.9375rem;color:var(--paper);
  border-bottom:1px solid transparent;
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.footer-list a:hover{color:var(--cyan);border-bottom-color:var(--cyan);}
.footer-contact__list{display:flex;flex-direction:column;gap:15px;}
.footer-contact__item{display:flex;flex-direction:column;gap:3px;}
.footer-contact__label{
  font-family:var(--font-heading);font-size:.6875rem;letter-spacing:.2em;color:var(--muted);
}
.footer-contact__value{
  font-family:var(--font-data);font-size:.875rem;line-height:1.75;
  color:var(--paper);word-break:break-word;
}
.footer-legal{
  display:flex;flex-wrap:wrap;align-items:baseline;justify-content:space-between;
  gap:10px 26px;
  margin-top:clamp(40px,6vw,76px);padding-top:22px;
  border-top:1px solid var(--line);
  font-family:var(--font-heading);font-size:.8125rem;letter-spacing:.08em;color:var(--muted);
}
.footer-legal__line{position:relative;padding-left:16px;color:var(--paper);}
.footer-legal__line::before{
  content:"";position:absolute;left:0;top:.62em;width:7px;height:7px;
  border-radius:50%;background:var(--amber);
}
.footer-legal__note{flex:1 1 260px;}
.footer-legal__copy{font-family:var(--font-data);}

/* ---------- 10. 通用文本组件 ---------- */
.eyebrow{
  display:inline-block;
  font-family:var(--font-heading);font-size:.8125rem;font-weight:500;
  letter-spacing:.18em;color:var(--muted);
}
.section-head{
  display:flex;align-items:baseline;flex-wrap:wrap;gap:14px 20px;
  padding-bottom:16px;border-bottom:1px solid var(--line);
}
.section-head__num{
  font-family:var(--font-data);font-size:.8125rem;letter-spacing:.2em;color:var(--amber);
}
.section-head__title{
  font-family:var(--font-display);font-weight:300;
  font-size:clamp(1.8rem,4vw,3rem);line-height:1.15;letter-spacing:.02em;
}
.section-head__note{
  flex:1 1 220px;color:var(--muted);font-size:.9375rem;line-height:1.8;
}
.data-num{
  font-family:var(--font-data);font-variant-numeric:tabular-nums;
  font-feature-settings:"tnum" 1;
}
.tag{
  display:inline-flex;align-items:center;gap:7px;
  padding:4px 12px;border:1px solid var(--line);border-radius:var(--pill);
  font-family:var(--font-heading);font-size:.75rem;letter-spacing:.16em;color:var(--muted);
}
.tag--amber{color:var(--amber);border-color:rgba(255,182,60,.5);}
.tag--cyan{color:var(--cyan);border-color:rgba(56,225,207,.45);}

/* ---------- 11. 纸张叠层 ---------- */
.paper{
  position:relative;
  border:1px solid var(--line);
  background:var(--ink-800);
  padding:clamp(20px,3vw,32px);
}
.paper--stack{
  box-shadow:6px 6px 0 -1px var(--ink-900),7px 7px 0 -1px var(--line),
             12px 12px 0 -2px rgba(30,58,49,.55);
}

/* ---------- 12. 面包屑 / 章节索引 ---------- */
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:9px;
  font-family:var(--font-heading);font-size:.8125rem;letter-spacing:.14em;color:var(--muted);
}
.breadcrumb__link{color:var(--muted);transition:color .18s var(--ease);}
.breadcrumb__link:hover{color:var(--cyan);}
.breadcrumb__sep{color:var(--line);}
.breadcrumb [aria-current="page"]{color:var(--cyan-soft);}

.index-link{
  display:inline-flex;align-items:center;gap:10px;
  padding:8px 0;color:var(--muted);
  font-family:var(--font-heading);font-size:.875rem;letter-spacing:.06em;
  transition:color .18s var(--ease);
}
.index-link::before{
  content:"";width:14px;height:1px;background:var(--line);
  transition:width .18s var(--ease),background-color .18s var(--ease);
}
.index-link:hover{color:var(--paper);}
.index-link:hover::before{width:22px;background:var(--cyan);}
.index-link[aria-current="location"]{color:var(--amber);}
.index-link[aria-current="location"]::before{width:26px;background:var(--amber);}

/* ---------- 13. 图片容器 ---------- */
.media{
  position:relative;display:block;overflow:hidden;
  border:1px solid var(--line);background:var(--ink-800);
}
.media img{width:100%;height:100%;object-fit:cover;}
.media--16x9{aspect-ratio:16/9;}
.media--4x3{aspect-ratio:4/3;}
.media--1x1{aspect-ratio:1/1;}
.media--wide{aspect-ratio:21/9;}
.media__mask{
  position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(180deg,rgba(5,14,12,0) 42%,rgba(5,14,12,.85) 100%);
}
.media__caption{
  position:absolute;left:0;right:0;bottom:0;
  padding:14px 16px;
  font-family:var(--font-heading);font-size:.75rem;letter-spacing:.14em;color:var(--cyan-soft);
}

/* ---------- 14. 显现动效 ---------- */
[data-reveal]{opacity:1;transform:none;}
html.js [data-reveal]{
  opacity:0;transform:translateY(12px);
  transition:opacity var(--dur) var(--ease),transform var(--dur) var(--ease);
}
html.js [data-reveal].is-visible{opacity:1;transform:none;}

/* ---------- 15. 平板断点 ---------- */
@media (min-width:1024px) and (max-width:1279px){
  :root{--rail-w:96px;}
  .site-nav__link{padding:8px 10px;font-size:.875rem;}
  .nav-dock__actions .btn--ghost{display:none;}
  .nav-dock__panel{padding:6px 7px 6px 13px;}
}

/* ---------- 16. 移动 / 平板竖屏 ---------- */
@media (max-width:1023px){
  :root{--gutter:clamp(16px,5vw,28px);}

  .site-header{
    position:sticky;top:0;z-index:80;
    display:flex;align-items:center;gap:12px;
    padding:9px var(--gutter);
    background:rgba(10,30,25,.95);
    backdrop-filter:blur(14px);
    -webkit-backdrop-filter:blur(14px);
    border-bottom:1px solid var(--line);
  }

  .brand-rail{
    position:static;inset:auto;width:auto;
    flex-direction:row;align-items:center;gap:10px;
    padding:0;border-right:0;background:none;
  }
  .rail-brand{flex-direction:row;align-items:center;gap:9px;}
  .rail-mark{width:26px;height:26px;}
  .rail-mark__bar{left:4px;right:4px;bottom:5px;}
  .rail-brand__text{
    writing-mode:horizontal-tb;text-orientation:mixed;
    font-size:.9375rem;letter-spacing:.16em;
  }
  .rail-brand__sub{font-size:.625rem;padding:2px 7px;letter-spacing:.18em;}
  .rail-tagline,.rail-meter{display:none;}

  .nav-dock{position:static;left:auto;right:auto;margin-left:auto;pointer-events:auto;}
  .nav-dock__canvas{max-width:none;padding-inline:0;justify-content:flex-end;pointer-events:auto;}

  .nav-toggle{display:inline-flex;}

  .nav-dock__panel{
    position:absolute;top:100%;left:0;right:0;
    display:none;flex-direction:column;align-items:stretch;gap:14px;
    padding:18px var(--gutter) 22px;
    border:1px solid var(--line);border-top:0;
    border-radius:0 0 20px 20px;
    background:var(--ink-800);
    box-shadow:0 28px 52px -26px #000;
    max-height:calc(100vh - 60px);
    overflow-y:auto;
    pointer-events:auto;
  }
  .site-header[data-open] .nav-dock__panel{display:flex;}

  .site-nav__list{flex-direction:column;align-items:stretch;gap:2px;}
  .site-nav__link{
    justify-content:flex-start;
    padding:13px 12px;border-radius:10px;
    font-size:1rem;color:var(--paper);
    border-bottom:1px solid rgba(30,58,49,.75);
  }
  .site-nav__link:last-child{border-bottom:0;}
  .site-nav__link::before{width:6px;height:6px;}

  .nav-dock__actions{
    flex-direction:column;align-items:stretch;gap:10px;
    margin-left:0;padding-left:0;padding-top:16px;border-left:0;border-top:1px solid var(--line);
  }
  .nav-dock__actions .btn--ghost{display:inline-flex;}

  .footer-top{grid-template-columns:1fr;gap:36px;}
  .footer-groups{grid-template-columns:1fr 1fr;}
  .footer-legal{flex-direction:column;align-items:flex-start;gap:12px;}
}

@media (max-width:560px){
  .footer-groups{grid-template-columns:1fr;}
  .footer-brand__mark{font-size:1.6rem;}
  .footer-legal__copy{align-self:flex-start;}
}

/* ---------- 17. 桌面主区域为品牌轨道让位 ---------- */
@media (min-width:1024px){
  body{padding-left:var(--rail-w);}
}

/* ---------- 18. 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;
  }
  html.js [data-reveal]{opacity:1;transform:none;}
  .rail-meter__fill{transition:none;}
}