/* =========================================================
   8博体育 · 共享样式 /assets/site.css
   深海蓝 + 珊瑚橙 + 荧光青绿 / 技术蓝图网格 / 夜场看板
   ========================================================= */

/* ---------- 1. 变量 ---------- */
:root{
  --deep-sea:#061A2B;
  --night-blue:#0B2A44;
  --bay-blue:#103B5C;
  --coral:#FF6B4A;
  --warm-coral:#FF9A7A;
  --aqua:#39F5D0;
  --signal:#FFD166;
  --paper:#F3EFE6;
  --salt:#C9D9E3;
  --ink:#071018;

  --text-on-dark:#E6EEF4;
  --text-dim:#8FA9BC;

  --font-display:"Arial Black","Helvetica Neue","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,sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --wrap:1200px;
  --gutter:clamp(16px,4vw,40px);
  --radius-s:4px;
  --radius-m:10px;
  --radius-l:22px;
  --ease:cubic-bezier(.2,.7,.3,1);
  --line-dark:rgba(201,217,227,.16);
  --line-light:rgba(16,59,92,.16);
}

/* ---------- 2. Reset ---------- */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body,h1,h2,h3,h4,h5,h6,p,figure,blockquote,dl,dd{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
img,svg,video{display:block;max-width:100%;}
button,input,select,textarea{font:inherit;color:inherit;}
button{background:none;border:0;}
a{color:inherit;}

/* ---------- 3. 基础排版（中文优先） ---------- */
body{
  margin:0;
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.7;
  letter-spacing:.005em;
  background:var(--deep-sea);
  color:var(--text-on-dark);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

h1,h2,h3,h4,h5,h6{
  font-family:var(--font-display);
  font-weight:900;
  line-height:1.14;
  letter-spacing:-.015em;
}

p,li{line-height:1.75;}

strong{font-weight:700;}
em{font-style:normal;color:var(--warm-coral);}
small{font-size:.82em;}

.mono{
  font-family:var(--font-mono);
  font-size:.78em;
  letter-spacing:.14em;
  text-transform:uppercase;
}

/* ---------- 4. 布局工具 ---------- */
.wrap{
  width:min(calc(100% - var(--gutter) * 2), var(--wrap));
  margin-inline:auto;
}

.grid{
  display:grid;
  gap:clamp(16px,2.4vw,28px);
}
.grid > *{min-width:0;}
.grid-12{grid-template-columns:repeat(12,minmax(0,1fr));}

.stack > * + *{margin-top:var(--stack-gap,1.2rem);}

.section-head{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  justify-content:space-between;
  gap:12px 24px;
  margin-bottom:clamp(18px,2.5vw,30px);
}
.section-title{
  margin:0;
  font-size:clamp(24px,3.4vw,40px);
  color:currentColor;
}

/* ---------- 5. 跳转链接与焦点 ---------- */
.skip-link{
  position:fixed;
  top:10px;
  left:10px;
  z-index:200;
  padding:10px 18px;
  border-radius:999px;
  background:var(--aqua);
  color:var(--deep-sea);
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:700;
  letter-spacing:.1em;
  text-decoration:none;
  transform:translateY(-180%);
  transition:transform .25s var(--ease);
}
.skip-link:focus{transform:translateY(0);}

:where(a,button,[tabindex]):focus-visible{
  outline:2px solid var(--aqua);
  outline-offset:3px;
  border-radius:6px;
}
.site-footer :where(a,button):focus-visible,
.header-utility :where(a,button):focus-visible{
  outline-color:var(--signal);
}

/* ---------- 6. 按钮 ---------- */
.btn{
  --btn-bg:var(--coral);
  --btn-fg:var(--deep-sea);
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:12px 22px;
  border:1px solid transparent;
  border-radius:999px;
  background:var(--btn-bg);
  color:var(--btn-fg);
  font-family:var(--font-body);
  font-size:14px;
  font-weight:700;
  letter-spacing:.02em;
  text-decoration:none;
  cursor:pointer;
  white-space:nowrap;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),background .22s var(--ease),color .22s var(--ease);
}
.btn:hover{transform:translateY(-2px);}
.btn:active{transform:translateY(0);}

.btn-primary{
  background:var(--coral);
  color:var(--deep-sea);
  box-shadow:0 10px 22px -16px rgba(255,107,74,.95);
}
.btn-primary:hover{
  background:var(--warm-coral);
  box-shadow:0 14px 28px -14px rgba(255,107,74,.85);
}

.btn-ghost{
  background:transparent;
  color:var(--coral);
  border-color:rgba(255,107,74,.55);
}
.btn-ghost:hover{
  background:rgba(255,107,74,.12);
  color:var(--warm-coral);
}

.btn-sm{
  padding:9px 16px;
  font-size:13px;
}

/* ---------- 7. 头部 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:var(--deep-sea);
  color:var(--text-on-dark);
  border-bottom:1px solid var(--line-dark);
  box-shadow:0 22px 40px -34px rgba(0,0,0,.95);
}

/* 顶部索引带 */
.header-utility{
  background:var(--ink);
  border-bottom:1px solid rgba(201,217,227,.1);
}
.utility-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  min-height:30px;
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--text-dim);
}
.util-lead{
  display:flex;
  align-items:center;
  gap:8px;
  margin:0;
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
}
.util-dot{
  flex:0 0 auto;
  width:6px;
  height:6px;
  border-radius:50%;
  background:var(--aqua);
  box-shadow:0 0 0 3px rgba(57,245,208,.16);
  animation:utilPulse 2.8s var(--ease) infinite;
}
.util-meta{
  display:flex;
  align-items:center;
  gap:18px;
  margin:0;
}
.util-item{white-space:nowrap;}
.util-item + .util-item{position:relative;}
.util-item + .util-item::before{
  content:"";
  position:absolute;
  left:-9px;
  top:50%;
  width:1px;
  height:9px;
  transform:translateY(-50%);
  background:rgba(201,217,227,.25);
}
@keyframes utilPulse{
  0%,100%{opacity:1;transform:scale(1);}
  50%{opacity:.55;transform:scale(.78);}
}

/* 命令栏 */
.header-bar{
  position:relative;
  background:linear-gradient(100deg,var(--deep-sea) 0%,var(--deep-sea) 58%,var(--night-blue) 100%);
}
.bar-inner{
  display:flex;
  align-items:center;
  gap:clamp(12px,2vw,28px);
  min-height:68px;
  padding-block:10px;
}

/* 品牌 */
.brand{
  flex:0 0 auto;
  display:inline-flex;
  align-items:center;
  gap:11px;
  text-decoration:none;
  color:inherit;
}
.brand-mark{
  position:relative;
  display:grid;
  place-items:center;
  width:36px;
  height:36px;
  border-radius:11px 3px 11px 3px;
  background:linear-gradient(140deg,var(--coral),var(--warm-coral));
  transform:rotate(-8deg);
  box-shadow:0 0 0 1px rgba(255,107,74,.45),0 10px 22px -16px rgba(255,107,74,.9);
  transition:transform .35s var(--ease);
}
.brand-mark-core{
  width:12px;
  height:12px;
  border-radius:2px;
  background:var(--deep-sea);
  transform:rotate(8deg);
}
.brand:hover .brand-mark{transform:rotate(0deg) scale(1.05);}
.brand-text{display:flex;flex-direction:column;line-height:1.1;}
.brand-cn{
  font-family:var(--font-display);
  font-size:19px;
  font-weight:900;
  letter-spacing:-.01em;
  color:var(--text-on-dark);
}
.brand-en{
  font-family:var(--font-mono);
  font-size:9px;
  letter-spacing:.3em;
  color:var(--aqua);
}

/* 主导航 */
.main-nav{
  flex:1 1 auto;
  display:flex;
  justify-content:flex-end;
  min-width:0;
}
.nav-list{
  display:flex;
  align-items:center;
  gap:2px;
  flex-wrap:wrap;
}
.nav-link{
  --nav-pad-x:12px;
  position:relative;
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:10px var(--nav-pad-x);
  border-radius:8px;
  font-size:14px;
  color:var(--text-on-dark);
  text-decoration:none;
  transition:background .2s var(--ease),color .2s var(--ease);
}
.nav-link::before{
  content:attr(data-idx);
  font-family:var(--font-mono);
  font-size:9px;
  letter-spacing:.06em;
  color:var(--aqua);
  opacity:.5;
  transition:opacity .2s var(--ease),color .2s var(--ease);
}
.nav-link:hover{
  background:rgba(201,217,227,.08);
  color:#fff;
}
.nav-link:hover::before{opacity:1;}

.nav-link[aria-current="page"]{
  background:rgba(57,245,208,.13);
  color:var(--aqua);
}
.nav-link[aria-current="page"]::before{opacity:1;color:var(--aqua);}
.nav-link[aria-current="page"]::after{
  content:"";
  position:absolute;
  left:var(--nav-pad-x);
  right:var(--nav-pad-x);
  bottom:5px;
  height:2px;
  border-radius:2px;
  background:var(--coral);
}

/* 头部操作区 + 移动按钮 */
.header-actions{
  flex:0 0 auto;
  display:flex;
  align-items:center;
  gap:10px;
}
.nav-toggle{
  display:none;
  align-items:center;
  gap:8px;
  padding:9px 13px 9px 11px;
  border:1px solid rgba(201,217,227,.26);
  border-radius:999px;
  background:transparent;
  color:var(--text-on-dark);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.16em;
  text-transform:uppercase;
  cursor:pointer;
  transition:border-color .2s var(--ease),color .2s var(--ease),background .2s var(--ease);
}
.nav-toggle:hover{
  border-color:var(--aqua);
  color:var(--aqua);
  background:rgba(57,245,208,.08);
}
.nav-toggle-bars{
  position:relative;
  display:block;
  width:16px;
  height:10px;
}
.nav-toggle-bars::before,
.nav-toggle-bars::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  height:2px;
  border-radius:2px;
  background:currentColor;
  transition:transform .25s var(--ease),top .25s var(--ease),bottom .25s var(--ease);
}
.nav-toggle-bars::before{top:0;}
.nav-toggle-bars::after{bottom:0;}
.site-header[data-open="true"] .nav-toggle-bars::before{top:4px;transform:rotate(45deg);}
.site-header[data-open="true"] .nav-toggle-bars::after{bottom:4px;transform:rotate(-45deg);}
.site-header[data-open="true"] .nav-toggle{
  border-color:var(--aqua);
  color:var(--aqua);
}

/* ---------- 8. 头部响应式 ---------- */
@media (max-width:1120px){
  .nav-link{padding:9px 8px;font-size:13px;}
  .nav-link::before{display:none;}
  .nav-link[aria-current="page"]::after{left:8px;right:8px;}
}
@media (max-width:980px){
  .site-header{position:sticky;}
  .bar-inner{min-height:60px;}
  .nav-toggle{display:inline-flex;}
  .main-nav{
    position:absolute;
    left:0;
    right:0;
    top:100%;
    display:none;
    justify-content:stretch;
    padding:10px var(--gutter) 16px;
    background:var(--night-blue);
    border-top:1px solid var(--line-dark);
    border-bottom:1px solid var(--line-dark);
    box-shadow:0 30px 50px -30px rgba(0,0,0,.95);
  }
  .site-header[data-open="true"] .main-nav{display:block;}
  .nav-list{
    flex-direction:column;
    align-items:stretch;
    gap:2px;
  }
  .nav-list > li{width:100%;}
  .nav-link{
    --nav-pad-x:14px;
    width:100%;
    padding:13px var(--nav-pad-x);
    font-size:15px;
    border-radius:10px;
  }
  .nav-link::before{display:inline;font-size:10px;}
  .nav-link[aria-current="page"]::after{left:14px;right:14px;bottom:7px;}
}
@media (max-width:720px){
  .util-meta{display:none;}
  .utility-inner{justify-content:flex-start;}
  .brand-cn{font-size:17px;}
  .brand-en{letter-spacing:.24em;}
  .brand-mark{width:32px;height:32px;}
}
@media (max-width:420px){
  .btn-sm{padding:8px 13px;font-size:12px;}
  .nav-toggle{padding:8px 11px;}
  .bar-inner{gap:10px;}
}

/* ---------- 9. 页脚 ---------- */
.site-footer{
  position:relative;
  overflow:hidden;
  padding-top:clamp(44px,6vw,76px);
  background:var(--ink);
  color:var(--text-on-dark);
  border-top:1px solid rgba(201,217,227,.12);
}
.site-footer::before{
  content:"";
  position:absolute;
  inset:0 0 auto 0;
  height:4px;
  background:linear-gradient(90deg,var(--coral) 0 34%,var(--signal) 34% 52%,var(--aqua) 52% 100%);
  opacity:.9;
}
.footer-glow{
  position:absolute;
  right:-12%;
  bottom:-46%;
  width:70vw;
  height:70vw;
  max-width:820px;
  max-height:820px;
  pointer-events:none;
  background:
    radial-gradient(circle at 30% 30%,rgba(255,107,74,.22),transparent 62%),
    radial-gradient(circle at 72% 68%,rgba(57,245,208,.16),transparent 60%);
  filter:blur(22px);
}
.footer-grid{
  position:relative;
  z-index:1;
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.4fr;
  gap:clamp(24px,3vw,48px);
}

.footer-brand{display:flex;flex-direction:column;gap:14px;}
.brand-footer{margin-bottom:2px;}
.footer-tagline{
  margin:0;
  font-family:var(--font-display);
  font-size:clamp(15px,1.4vw,18px);
  letter-spacing:-.005em;
  color:var(--text-on-dark);
}
.footer-note{
  margin:0;
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--aqua);
}

.footer-col{min-width:0;}
.footer-title{
  display:flex;
  align-items:center;
  gap:8px;
  margin-bottom:16px;
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:700;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--paper);
}
.footer-title::before{
  content:"";
  flex:0 0 auto;
  width:6px;
  height:6px;
  border-radius:2px;
  background:var(--coral);
  transform:rotate(45deg);
}
.footer-list{display:flex;flex-direction:column;gap:2px;}
.footer-link{
  position:relative;
  display:inline-block;
  padding:4px 0;
  font-size:14px;
  color:var(--text-dim);
  text-decoration:none;
  transition:color .2s var(--ease);
}
.footer-link::after{
  content:"";
  position:absolute;
  left:0;
  bottom:2px;
  width:100%;
  height:1px;
  background:var(--aqua);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .3s var(--ease);
}
.footer-link:hover{color:var(--aqua);}
.footer-link:hover::after{transform:scaleX(1);}

.footer-meta{display:grid;gap:13px;margin:0;}
.footer-meta-row{display:grid;gap:2px;}
.footer-meta dt{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--text-dim);
}
.footer-meta dd{
  margin:0;
  font-size:14px;
  line-height:1.6;
  color:var(--text-on-dark);
  overflow-wrap:anywhere;
}
.footer-contact dd{color:var(--paper);}

.footer-bottom{
  position:relative;
  z-index:1;
  margin-top:clamp(32px,5vw,58px);
  border-top:1px solid rgba(201,217,227,.14);
  background:rgba(6,26,43,.55);
}
.footer-bottom-inner{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:8px 26px;
  padding-block:18px;
}
.footer-legal{
  margin:0;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--text-dim);
}

@media (max-width:980px){
  .footer-grid{grid-template-columns:1fr 1fr;}
  .footer-brand{grid-column:1 / -1;}
}
@media (max-width:600px){
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom-inner{justify-content:flex-start;}
  .footer-legal{font-size:10px;}
}

/* ---------- 10. 通用内容组件 ---------- */
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:9px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--aqua);
}
.eyebrow::before{
  content:"";
  width:22px;
  height:2px;
  border-radius:2px;
  background:var(--coral);
}

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 11px;
  border:1px solid rgba(201,217,227,.32);
  border-radius:999px;
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:inherit;
  white-space:nowrap;
}
.tag--coral{
  border-color:rgba(255,107,74,.55);
  color:var(--coral);
}
.tag--aqua{
  border-color:rgba(57,245,208,.5);
  color:var(--aqua);
}
.tag--solid{
  background:var(--coral);
  border-color:transparent;
  color:var(--deep-sea);
  font-weight:700;
}

.breadcrumb{margin-bottom:clamp(18px,3vw,32px);}
.breadcrumb-list{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.12em;
  text-transform:uppercase;
  opacity:.75;
}
.breadcrumb-list li{display:flex;align-items:center;gap:8px;}
.breadcrumb-list li + li::before{content:"/";opacity:.5;}
.breadcrumb-list a{text-decoration:none;transition:color .2s var(--ease);}
.breadcrumb-list a:hover{color:var(--coral);}

.prose{
  max-width:42em;
  line-height:1.85;
  color:inherit;
}
.prose > * + *{margin-top:1.1em;}
.prose h2{
  margin-top:2em;
  font-size:clamp(22px,2.4vw,30px);
}
.prose h3{
  margin-top:1.6em;
  font-size:clamp(18px,1.6vw,22px);
}
.prose ul{display:flex;flex-direction:column;gap:.5em;}
.prose ul > li{
  position:relative;
  padding-left:1.4em;
}
.prose ul > li::before{
  content:"";
  position:absolute;
  left:0;
  top:.72em;
  width:7px;
  height:7px;
  border-radius:2px;
  background:var(--coral);
  transform:rotate(45deg);
}
.prose a{
  color:inherit;
  text-decoration:underline;
  text-decoration-thickness:1px;
  text-decoration-color:var(--coral);
  text-underline-offset:4px;
  transition:text-decoration-color .2s var(--ease);
}
.prose a:hover{text-decoration-color:var(--aqua);}

.card{
  position:relative;
  display:block;
  padding:clamp(16px,2.2vw,26px);
  border:1px solid var(--line-light);
  border-radius:var(--radius-l);
  background:#FBF8F2;
  color:var(--ink);
  text-decoration:none;
  transition:transform .3s var(--ease),border-color .3s var(--ease),box-shadow .3s var(--ease);
}
a.card:hover{
  transform:translateY(-4px);
  border-color:rgba(255,107,74,.5);
  box-shadow:0 24px 42px -34px rgba(6,26,43,.85);
}
.card--dark{
  background:var(--night-blue);
  color:var(--text-on-dark);
  border-color:var(--line-dark);
}

/* 图片容器基础规则（页面阶段放入 <img> 与 <figcaption>） */
.media-frame{
  position:relative;
  display:block;
  overflow:hidden;
  margin:0;
  border:1px solid var(--line-dark);
  border-radius:var(--radius-l);
  background:linear-gradient(150deg,var(--night-blue),var(--bay-blue));
}
.media-frame::before{
  content:"";
  position:absolute;
  top:0;
  right:0;
  width:44%;
  aspect-ratio:1;
  pointer-events:none;
  background:linear-gradient(220deg,rgba(255,107,74,.34),transparent 70%);
  clip-path:polygon(100% 0,100% 100%,0 0);
}
.media-frame > img{
  display:block;
  width:100%;
  height:100%;
  object-fit:cover;
  aspect-ratio:16 / 9;
}
.media-frame figcaption{
  position:absolute;
  left:14px;
  bottom:12px;
  padding:3px 10px;
  border-radius:999px;
  background:rgba(7,16,24,.72);
  color:var(--signal);
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.14em;
  text-transform:uppercase;
}
.media-frame--wide > img{aspect-ratio:21 / 9;}
.media-frame--tall > img{aspect-ratio:4 / 5;}
@media (max-width:600px){
  .media-frame{border-radius:var(--radius-m);}
  .media-frame--wide > img{aspect-ratio:16 / 9;}
}

/* ---------- 11. 显现动效协议 ---------- */
.js [data-reveal]{
  opacity:0;
  transform:translateY(18px);
  transition:opacity .6s var(--ease),transform .6s var(--ease);
  will-change:opacity,transform;
}
.js [data-reveal="in"]{
  opacity:1;
  transform:none;
  will-change:auto;
}

/* ---------- 12. 减少动态 ---------- */
@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;
  }
  .js [data-reveal]{
    opacity:1;
    transform:none;
    transition:none;
  }
  .btn:hover,
  a.card:hover,
  .brand:hover .brand-mark{
    transform:none;
  }
}